JP3416251B2 - Method of changing rolls of multi-high rolling mill, roll changing apparatus used for the same, and multi-high rolling mill - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reassembling method and a reassembling apparatus used for reassembling work rolls, first and second intermediate rolls, backup rolls and other rolls equipped in a multi-high rolling mill. It also relates to a multi-high rolling mill suitable for implementing these.

[0002]

2. Description of the Related Art FIG. 39 is a side view of a multi-high rolling mill M having 20 rolls. The lower housing DH has a lower work roll DWR as a core and two lower first rolls around its periphery.
Intermediate roll DMR (1), three lower second intermediate rolls DM
R (2), four lower backup rolls DBR are provided, and the upper housing UH has two upper first intermediate rolls UMR (1) and three upper work rolls UWR as cores. Upper second intermediate roll UMR (2), 4
A book upper backup roll UBR is provided.
P is a pass line, which is the direction along the pass line P (the left-right direction in FIG. 39, hereinafter referred to as the multi-high rolling mill M.
Upper and lower work rolls UW
Rolled material (not shown) is located on both sides of R and DWR.
Upper and lower strip guides SG for guiding the are provided.

The upper and lower backup rolls UBR and DBR provided in the multi-stage rolling mill M generally have a plurality of bearing portions and fan-shaped projections in the radial direction and are interposed between the bearing portions. What is formed by skewering a saddle SD with a support shaft is used. In the following, the effective length (roll surface length) of the upper and lower work rolls UWR and DWR is 800 mm, and the upper and lower first intermediate rolls UMR
(1), DMR (1) or upper and lower second intermediate rolls UMR (2)
, DMR (2) effective length is 1000mm, and upper and lower backup rolls UBR, DBR effective length is 1150mm. We call them "large" to distinguish them.

By the way, in the standard type multi-high rolling mill M, the upper first intermediate roll UMR (1) and the upper second intermediate roll UMR (2) are not shown in the drawing, but the bearing members are respectively provided on both end side pivot shaft portions. Generally, the bearings are fitted in the upper housing UH and are held by being biased by a coil spring along the upper housing UH. Thus, each roll is balanced (prevention of falling when the upper housing UH is raised and retention of the levelness). Also, the upper work roll U
The WR is just placed on the lower work roll DWR, and when the upper housing UH is raised,
It is adapted to be picked up by a pair of strip guides SG on the upper side.

Conventionally, roll changing methods for such a multi-high rolling mill M include a porter bar method and a trolley method. The porter bar system conveys the porter bar suspended horizontally by a crane via a wire rope or the like to the working side of the multi-stage rolling mill M, and one end of this porter bar is screw-connected to the pivot portion of a predetermined roll, and the porter bar is connected. A balance weight that balances the weight of the roll is provided on the other end side, and the crane is operated in this state to pull out the roll from the multistage rolling mill M or insert it in the opposite direction. As an example of implementing this porter bar system for a backup roll UBR or DBR
There is a roll changing jig described in No. 4.

This porter bar system has a drawback in that the work efficiency is extremely poor in the porter bar suspending work, the weight balancing work, and the like, and in such a suspending state, there is a risk that wobbling tends to occur and therefore the danger is high. It was In particular, it was unsuitable for work rolls UWR and DWR that are frequently exchanged. On the other hand, the trolley system is developed to eliminate the drawbacks of the porter bar system, and a trolley capable of traveling orthogonal to the pass line P is provided on the working side of the multi-stage rolling mill M, and on this trolley. By providing a roll holding device that can be screw-connected to the pivot of the predetermined roll, the predetermined roll held by the roll holding device can be used by using the traveling of the dolly (the slide table provided on the dolly can be moved back and forth). Is pulled out from the multi-stage rolling mill M or inserted in the opposite direction. As an example in which this trolley system is applied to work rolls UWR, DWR and first intermediate rolls UMR (1), DMR (1) which are relatively lightweight, roll change described in Japanese Utility Model Publication No. 61-190304 There is a device.

However, such a trolley system also has the following drawbacks. That is, since the roll holding device and the predetermined roll are directly screw-connected, the work efficiency is poor, and further, due to vibrations and impacts generated during this work,
There was a risk of scratching the roll surface (this point also existed in the porter bar system, but it was not resolved when the trolley system was developed). Further, the carriage is provided with an elevating means for elevating and lowering the roll holding device to prevent the holding roll which is being extracted or inserted from hitting other rolls in the multi-stage rolling mill M and being damaged. However, this elevating means could not have a long elevating stroke due to the traveling of the carriage. Therefore, it has been difficult to apply this trolley system to rolls such as backup rolls UBR and DBR whose setting range set in the multi-stage rolling mill M is wide in the vertical direction.

Therefore, the applicant of the present invention has previously developed and applied for a patent for a roll changing device which eliminates all of these drawbacks (Japanese Patent Laid-Open No. 5-317932). The roll changing device according to this prior application is an elevating cylinder having a long stroke provided in a standing hole in a hole formed in a foundation (floor surface) on the working side of a multi-stage rolling mill M, and the elevating cylinder. A horizontally rotatable turntable provided at the end of the rod facing upward, a slide table capable of advancing and retracting on the turntable, and a roll chuck such as a three-jaw chuck provided on the slide table. And a king device. The above turntable is
This is necessary to store the extracted rolls in a roll storage table provided in parallel with the pass line P on the working side of the multi-high rolling mill M.

Incidentally, the forward / backward movement of the slide table, the chucking operation of the roll chucking device, and the like are operated by a handwheel.

[0010]

In the roll changing device according to the prior application, since the roll chucking device has a structure for gripping the pivot portion of the roll, it is fatal that the radial dimension thereof is increased. Since it is necessary to avoid interference with various accessory devices provided on the side surface of the multi-high rolling mill M and the arrangement of the pivot parts according to the combination of various rolls, there are severe restrictions on the design. Especially, the backup roll U
When the pivots of the BR and DBR are gripped, it is necessary to consider the positional interference with the saddle housing recesses (see SD) formed in the upper housing UH and the lower housing DH.

For this reason, it has been difficult for the roll chucking device to have a sufficient functional and strength allowance. Therefore, in this type of roll chucking device, the limit is to hold the various rolls provided in the standard type multi-high rolling mill M, and if it exceeds this (that is,
When holding various rolls (for large-scale multi-high rolling mills), it is inevitable that the roll chucking device itself will bend. It was supposed to trigger.

After all, in a large multi-stage rolling mill, the porter bar system is obliged to be implemented, and the weight is heavy, so that the danger becomes higher and higher. Further, since the lifting cylinder having a long stroke is provided, a deep hole portion must be recessed in the foundation, which requires a large amount of work. Since there is this hole part, it is necessary to provide a slide floor plate that closes the upper part of the hole part due to these movements when the turntable horizontally turns and the slide table advances and retreats. Since it operates frequently, it not only narrows the walking range of the worker, but also destabilizes the scaffold.

Further, since the turntable is provided, there is a drawback in that its operating time is slightly longer than that of, for example, a truck system. By the way, in either the porter bar method or the trolley method, and also in the roll changing device according to the prior application, since each roll is cantilevered only by the pivot portion on one end side thereof, The stress is concentrated on the holding portion, which may cause distortion or scratches in some cases. This is due to the holding structure of the upper work roll UWR, the upper first intermediate roll UMR (1), and the upper second intermediate roll UMR (2) with respect to the upper housing UH. It was something that could not be solved only by improving.

When the upper housing UH is raised, the upper work roll UWR is supported by the upper strip guide SG at its lower portion as described above, and the upper first intermediate roll UMR (1). The upper second intermediate roll UMR (2) has its both end side pivots held by bearings. As a result, the upper strip guide SG and the bearings interfered with each other, and the rolls could not be received from below.

In addition to the above-described roll holding structure in the multi-stage rolling mill M, first of all, at the start of rolling, the rolling material cannot be rolled from the leading edge of the rolling, and the rolling material is passed in advance. It must be made flat (when it is not rolled, the upper work roll UWR is the upper first intermediate roll UM
It has a structural and fatal defect that it does not come into contact with R (1) (a gap corresponding to the roll gap is generated between the two), so it occurs because the driving force is not transmitted. Was there.

Secondly, the work rolls UWR, DW
Roll bending cannot be applied to the R, the first intermediate rolls UMR (1), DMR (1), and the second intermediate rolls UMR (2), DMR (2) (as described above, the upper housing UH and the lower housing UH). The housing DH has no space for newly providing a rolling-down means, and it is impossible to expect a rolling-down force with an existing coil spring. Even if such a coil spring has a strong elastic force and is large, it cannot be manually attached / detached.) It had the structural and fateful drawback.

In the end, these first and second drawbacks result in a decrease in yield. The present invention has been made in view of the above circumstances, and a purpose thereof is to have a purposely porter bar system not only for a standard multi-high rolling mill but also for a large multi-high rolling mill. A roll that enables roll reconfiguration without performing the above, and that enables safe, easy, and quick roll reconfiguration without damaging the roll during roll reconfiguration or roll transport. A second object of the present invention is to provide a reassembling method and a roll reassembling device, and a second object thereof is to provide a roll chucking device that contributes to an increase in size of the roll reassembling device, an elevating cylinder having a long stroke, and a turn. A simple structure that does not use a table or the like is to provide a roll changing device that eliminates various drawbacks caused by them, and a third object is to provide a new structure. In parallel with the development of the roll changing method and the new roll changing device, by improving the multi-high rolling mill so that synergistic effects with them can be obtained, distortions and scratches on the rolls due to roll changing were thoroughly implemented. In addition, it is possible to roll the rolled material from the time of the leading edge of the rolled material, and to correct (roll bending) when defective rolling shape occurs, thus improving the yield and high quality rolling. It is an object of the present invention to provide a multi-stage rolling mill that enables steel products to be obtained.

[0018]

In order to achieve the above object, the present invention takes the following technical means.

[0019]

The roll changing method according to claim 1, wherein raises the upper housing in a multistage rolling mill, to form a gap between the upper and lower work rolls by raising the upper work roll, to the gap, multi-high rolling mill From the work side of the work roll, the upper fork part that supports the lower outer peripheral surface of the upper work roll is advanced along the work roll axial center, and the holding relationship of the upper work roll with respect to the upper housing is released so that the upper work part is placed on the upper fork part. It is characterized in that the upper work roll is unloaded by loading the rolls and then withdrawing the upper fork portion from the inside of the multi-stage rolling mill to the outside of the mill, or by performing the reverse procedure thereof.

According to a second aspect of the present invention, there is provided a roll changing method in which the upper housing is raised in the multi-stage rolling mill, the upper work roll is raised or pulled out, and then the lower work roll is pushed up by the pivot portions on both ends thereof. To the gap formed below this lower work roll,
From the working side of the multi-high rolling mill, the lower fork part that supports the lower outer peripheral surface of the lower work roll is advanced along the work roll axis, and the lower work roll is lifted to release the lower work roll on the lower fork part. Is loaded and then the lower fork part is withdrawn from the inside of the multi-stage rolling mill to the outside of the multi-rolling mill, so that the lower work roll is pulled out or the reverse work procedure is performed to insert the lower work roll.

A roll reassembling method according to a third aspect of the present invention is the above-mentioned contract.
When the work roll is extracted in claim 1 or claim 2 , the loading fork part for inserting the new work roll is placed on the side of the recovery fork part supporting the extracted old work roll, After the withdrawal of the old work roll by the recovery fork is completed, the recovery fork is retracted from the operation center position where the recovery fork was located, and the loading fork is moved to the operation center position. Set
Then, the feature is that the new work roll is inserted by the loading fork part.

According to a fourth aspect of the present invention, there is provided a roll changing method in which the upper housing is raised in the multi-high rolling mill, the upper work roll is extracted from the upper housing, and then the upper work roll is removed from the working side of the multi-high rolling mill. A pair of clamping means for clamping both end-side pivotal parts of the upper intermediate roll toward the side of the upper intermediate roll and holding one or a plurality of upper intermediate rolls by these clamping means; It is characterized in that the upper intermediate roll is pulled out by pulling it out of the machine, or the upper intermediate roll is inserted by performing the reverse procedure.

According to a fifth aspect of the present invention, in the roll changing method, the upper housing of the multi-stage rolling mill is raised, the lower work roll is extracted from the lower housing, and then the lower work roll is pulled out from the working side of the multi-stage rolling mill. A pair of clamping means for clamping both end side pivotal parts of the lower intermediate roll toward the space, and holding one or a plurality of lower intermediate rolls by these clamping means, then both clamping means are subjected to multi-stage rolling It is characterized in that the lower intermediate roll is pulled out by pulling it out of the machine, or the lower intermediate roll is inserted by performing the reverse procedure.

[0025]

[0026]

[0027]

[0028]

According to a sixth aspect of the present invention, there is provided a roll changing device having a multistage pressure.
From the working side of the rolling mill (2), cross the pass line (P) at right angles.
Guide rail (4) laid in the direction of
A truck (9, etc.) that can run along the guide rail (4)
And a roll attaching / detaching device provided on this carriage (9 etc.)
(11 etc.) and arranged along the guide rail (4)
At least one roll storage device (6A etc.)
The roll desorption device (11 etc.)
Both side positions with the center of gravity of the
Roll holders (114, 115 etc.)
Set the roll holders (114, 115, etc.) on the multi-high rolling mill.
Advancing / retreating machine that advances or retreats along the axis of the rolled roll
And a roll storage device having a structure (113 etc.)
(6A, etc.) and multiple roll support parts (149, etc.)
A trolley (9, etc.) is horizontally attached to the roll storage device (6 A, etc.)
The roll loading / unloading device (11 etc.) and the roll
Rolls to and from the bearing support unit (149 etc.)
And a transfer device (140, etc.), and a traverse table that is movable in a longitudinal position of the guide rail and is orthogonal to the guide rail at a position lower than the guide rail. A first short rail connectable to the guide rail and a second short rail parallel to the side of the first short rail on the traverse stand and connectable to the guide rail.
It is characterized in that a bogie exchange device having a short rail is installed.

[0030]

[0031]

According to a seventh aspect of the present invention, there is provided a roll changing device having a multi-stage pressure.
Base part (stand) installed at a certain height on the working side of the rolling machine.
Car) and a work roll roll installed on this base.
And the roll desorption device.
Clamping hand that clamps both ends of the work roll
Upper roll holder with steps and lower work roll
Lower end equipped with clamping means for clamping both end side pivots
Part roll holder having a roll holder part and this roll
Axis of the work roll that is set in the multi-stage rolling mill
An advance / retreat mechanism for advancing or retreating in accordance with the mind,
The roll attachment / detachment device is characterized by being provided with a rotation mechanism for rotating the roll holder so that the upper and lower roll holder parts and the lower roll holder part are interchanged in the vertical positional relationship.

The roll reassembling apparatus according to claim 8 is a multistage pressure machine.
Base part (stand) installed at a certain height on the working side of the rolling machine.
Car) and a work roll roll installed on this base.
And the roll desorption device.
Upper fork part that supports the lower outer peripheral surface of the work roll and
And the lower outer surface of the lower work roll
And a roll holder that has a multi-layered structure
Advance along the axis of the work roll set on the rolling mill
Or a roll attaching / detaching device having an advancing / retreating mechanism for retracting the roll.
Is provided with a roll holder having the same structure as the roll holder having upper and lower fork parts or upper and lower roll holder parts, and one of the roll holders is the old one It is for collecting holding work rolls, and the other roll holder is for loading holding new work rolls to be inserted, and it is for collecting between roll desorption device or base or between both. It is characterized in that a shift mechanism for selectively shifting the roll holder and the loading roll holder with respect to the operation center position is provided.

[0034]

According to a ninth aspect of the present invention, there is provided a roll changing device having a multi-stage pressure.
Base part (stand) installed at a certain height on the working side of the rolling machine.
Car, etc.) and the intermediate roll row installed on this base
And a roll detaching device.
The holding body and this roll holding body are set in the multi-stage rolling mill.
A forward / backward machine that advances or retracts along the axis of the intermediate roll.
The roll holder has a structure inside the multi-stage rolling mill.
Long charging arm along the intermediate roll set to
And the intermediate lows provided near both ends of this charging arm.
Clamping means for clamping both end side pivots
In the roll attaching / detaching device, the roll holder can be rotated about its charging arm, so that the posture of the clamp can be changed so as to direct the clamping means to the intermediate rolls for the upper and lower positions. It is characterized in that a rotating mechanism is provided.

[0036]

[0037]

[0038]

According to a tenth aspect of the multi-stage rolling mill of the present invention, a push-up roller that abuts a little obliquely lower portion of the outer peripheral surface of the upper work roll when the upper housing is in the lowered position, and the push-up roller is moved back and forth along the pass line. A multi-high rolling mill comprising an upper work roll lifting device including a drive mechanism for driving the upper work roll. The multi-stage rolling mill according to claim 11 , wherein the lower work roll is pushed down by a push-down roller that comes into contact with a slightly oblique upper portion of the outer peripheral surface of the lower work roll, and a drive mechanism that moves the push-down roller forward and backward along a path line. It is characterized in that a device is provided.

According to a twelfth aspect of the present invention, in the multi-stage rolling mill, a pair of bearing pieces that engage with the pivot shaft portions on both ends of the upper first intermediate roll or are in contact with the upper first intermediate roll arranged on the outer peripheral surface of the upper work roll from below. And a drive mechanism for engaging and disengaging these support pieces with respect to both end side pivots of the upper first intermediate roll, a fall prevention device for the upper first intermediate roll is provided.

According to a thirteenth aspect of the present invention, in the multi-stage rolling mill, the upper first intermediate roll, which is disposed in contact with the upper outer peripheral surface of the upper work roll, applies upward downward pressure force by hydraulic pressure to both end side pivot shaft portions thereof. It is characterized in that a reduction device for the intermediate roll is provided. 15. The multi-stage rolling mill according to claim 14 , wherein the lower first intermediate roll, which is disposed in contact with the lower outer peripheral surface of the lower work roll, applies a downward downward pressure force by hydraulic pressure to both end side pivot shaft portions thereof. It is characterized in that a reduction device is provided.

The multi-high rolling mill according to claim 15 is the upper first
A pair of clamp means for clamping both end side pivotal parts of the upper second intermediate roll, which is disposed in contact with the upper outer peripheral surface of the intermediate roll, and an upper second intermediate roll clamped and held by these clamp means, in the bending direction thereof. An upper second intermediate roll positioning device including a hydraulic drive unit for moving along the upper part is provided.

According to a sixteenth aspect of the present invention, in the multi-stage rolling mill, a pair of clamping means for clamping both end side pivotal portions of the lower second intermediate roll, which is disposed in contact with the lower outer peripheral surface of the lower first intermediate roll, is provided. A lower second intermediate roll positioning device including a hydraulic drive unit for moving the lower second intermediate roll clamped and held by the clamp means along the bending direction thereof is provided.

The multi-high rolling mill according to claim 17 is the same as that according to claim 1.
Among the clamping means according to claim 5 or claim 16 , at least the clamping means arranged on the working side is provided with a retracting mechanism that swings in an open leg shape toward the side of the multi-stage rolling mill. I am trying.

[0045]

According to the first to fifth aspects of the present invention, the roll changing method is described.

The first aspect (or the second aspect ) is a method of holding the upper work roll (or the lower work roll) by supporting the outer peripheral surface of the lower work roll and reassembling the roll. According to claim 3 , the upper (or lower) old work roll is extracted from the multi-stage rolling mill by the method according to claim 1 (or claim 2 ), and immediately thereafter, it is made to stand by to those sideways. This is a method of inserting a new work roll on the upper part (or the lower part), which is intended to significantly reduce the working time.

According to claim 4 (or claim 5 ), the upper first intermediate roll and the upper second intermediate roll (or the lower first intermediate roll and the lower second intermediate roll) are clamped at their both end side pivot shaft portions. It is a method of holding and then recombining rolls.

[0048]

[0049]

Claims 6 to 9 relate to a roll changing device.

A sixth aspect of the present invention limits the installation of the trolley exchange device at a predetermined position in the longitudinal direction of the guide rail. The trolley exchange device is, for example, a work on the first short rail of the traverse platform. Guide the stop position of the traverse stand by placing the truck with the roll detachable body for the roll and the truck with the roll detachable body for the backup roll on the second short rail. By selecting for the rail, the selection of the roll desorption device to be used becomes extremely simple and quick.

[0052]

[0053] Claim 7, in which the b Lumpur holder, positioned between the upper roll holder portion and the lower roll holder portion is limited to also be provided with a rotating device for rotating as replaced vertically. By installing this rotating device, for example, for the upper and lower roll holder parts,
Work rolls having different roll crowns, roll diameters, and the like are held, and these can be appropriately selected and arranged or replaced based on the rolling result of the previous pass.

[0054]

[0055] Claim 8, in Russia Lumpur desorber, is obtained by limiting, further comprising: a pair of roll holding member. That is, the upper fork portion (or the upper roll holder portion) is a left and right pair, and the lower fork portion (or the lower roll holder portion) is also a left and right pair. Then, these roll holders (the upper fork portions and the lower fork portions, or the upper roll holder portions and the lower roll holder portions) are selectively positioned by the shift mechanism at the operation center position for the multi-stage rolling mill. It is possible. Therefore, the upper and lower old work rolls can be extracted from the multi-high rolling mill, and then the upper and lower new work rolls can be continuously inserted into the multi-high rolling mill.

[0056]

[0057] Claim 9, in which the b Lumpur holder, is limited to also be provided with a rotating device for rotating about the charging arm which clamping means is attached.
By providing this rotating device, a plurality of intermediate rolls (upper and lower first intermediate rolls and / or upper and lower second intermediate rolls) in each arrangement can be recombined with only one roll holder. it can.

[0058]

[0059]

[0060]

[0061]

This lifting piece can be adapted to work rolls of various diameters by lowering the upper housing by allowing the work rolls to move up and down while maintaining the posture in which the upper work rolls can be engaged. When in position (during rolling), roll bending may be applied to the upper work roll. Moreover, when not rolling, the upper work roll is replaced by the upper intermediate roll (upper first roll).
Since it can be kept in contact with the intermediate roll),
The rolling can be started at the time of passing the leading end of the rolled material.

[0063]

Claims 10 to 17 relate to a multi-high rolling mill.
It is a thing. Claim 10 limits the provision of a lifting device for the upper work roll,
With this lifting device, when the upper housing is still in the lowered position, the lifting roller is brought into contact with a slightly oblique lower part of the outer peripheral surface of the upper work roll, and the lifting roller is further advanced toward the upper work roll. With such an advancing movement, it is possible to generate a wedge-like lifting action. Therefore, upward force can be applied to the upper work roll. Therefore, at this time, if the upper housing is raised synchronously, the upper work roll can be raised together, and if the upper housing is not raised, roll bending can be applied to the upper work roll.

The eleventh aspect limits the provision of the push-down device for the lower work roll,
This press-down device is such that a press-down roller is brought into contact with the upper surface of the lower work roll at a slightly oblique upper surface, and the press-down roller can be advanced toward the lower work roll. With such an advanced movement, a wedge-like depression action can be generated. Therefore, it is possible to apply a downward force to the lower work roll, which allows roll bending of the lower work roll.

A twelfth aspect of the invention is limited to the provision of a fall prevention device for the upper first intermediate roll, and the fall prevention device is provided on both end side pivot shafts of the upper first intermediate roll when raising the upper housing. A bearing piece is adapted to be engaged with the portion, and literally prevents the falling piece. Claim 13 (or claim 14 ) limits provision of a reduction device for the upper first intermediate roll (or lower first intermediate roll), and this reduction device is provided for the upper first intermediate roll. An upward pressing force by hydraulic pressure (or a downward pressing force by hydraulic pressure on both end side pivot parts of the lower first intermediate roll) is applied to both end side pivot parts. Thereby, roll bending can be made to act on the upper first intermediate roll (or the lower first intermediate roll) as necessary. Since it uses a hydraulic pressure reduction structure, it can be made compact.

In particular, in the reduction device for the upper first intermediate roll, it is possible to utilize this to perform roll balance of the upper first intermediate roll (prevention of falling when the upper housing rises and adjustment of horizontality). Claim 15 (or Claim
16 ) limits the provision of a positioning device for the upper second intermediate roll (or the lower second intermediate roll). This positioning device clamps both end side pivots of the upper second intermediate roll (or the lower second intermediate roll) by a clamp means, and holds the clamped upper second intermediate roll (or lower second intermediate roll). The hydraulic drive unit is adapted to move along the bending direction. Thereby, roll bending can be applied to the upper second intermediate roll (or the lower second intermediate roll). Since a hydraulic pressure reduction structure is adopted, the size can be reduced.

Particularly, in the positioning device for the upper second intermediate roll, it is possible to utilize this to perform roll balance of the upper second intermediate roll (prevention of falling when the upper housing rises and adjustment of the levelness). Claim 17 claims
The clamp means according to claim 15 or claim 16 is limited to the provision of a retracting mechanism for swinging the multi-high rolling mill laterally in an open leg shape. With this retracting mechanism,
The clamp means does not interfere with roll changing work such as a backup roll. Needless to say, this retracting mechanism may be provided only in the clamp device arranged on the side for performing the roll changing operation.

[0069]

Embodiments of the present invention will be described below with reference to the drawings. [I]. Overall Configuration FIG. 1 shows the arrangement relationship between a roll changing device 1 according to the present invention and a multi-high rolling mill 2 which is improved for implementing the roll changing device 1.

In the following description, for convenience, the lower side of FIG. 1 is referred to as “front”, the upper side thereof is referred to as “rear”, the rolling mill side corresponding to the left side of FIG. 1 is referred to as “left”, and the working side corresponding to the same right side is referred to as “right”. To do. Further, as to the reference numerals of the various rolls and the respective parts of the multi-high rolling mill 2, the parts attached to FIG. 39 are used as they are, and the other parts are omitted only when it is necessary to distinguish them particularly in the vertical arrangement and the like. [I-1]. 1. Overall Configuration of Roll Changing Device The roll changing device 1 includes a trolley changing device 3 provided on the right side of the multi-high rolling mill 2 and a further right side thereof in a direction orthogonal to a pass line P of the multi-high rolling mill 2. A guide rail 4 laid toward the roll storage device 5A, which is arranged so as to form a pair in the front-rear direction along a line along the guide rail 4.
5B to 8A and 8B, trolleys 9 and 10 that can travel over the trolley exchanging device 3 to the upper portions of the guide rails 4, and roll unloading devices 11 and 1 mounted on these trolleys 9 and 10.
It consists of 2. [I-1- (1)]. Roll storage device In the roll storage devices 5A, 5B to 8A, 8B, the one arranged on the front side of the guide rail 4 (the one having the symbol A) is dedicated to the supply of the new roll, and the one arranged on the rear side thereof (the symbol B is designated as B). The ones with a mark) are dedicated to the recovery of the old rolls, and these two have the same configuration except that the front-rear direction is reversed (which may include some structural reversal). Then, these roll storage devices 5A, 5B-
8A and 8B are those for the first intermediate roll (5A, 5B), those for the work roll (6A, 6B), and those for the backup roll (in order from the one closer to the multi-stage rolling mill 2 to the one further away. 7A, 7B), and roll storage devices 7A, 7B dedicated to this backup roll.
Can be replaced with the roll storage devices 8A and 8B dedicated to the second intermediate roll placed in another place.

The roll accommodating devices 5A, 5B-
The presence or absence of the arrangement and the order in 8A and 8B can be arbitrarily changed. For example, the roll accommodating devices 6A and 6B dedicated to the work rolls that have to be frequently recombined with rolls are provided in a multi-stage rolling mill. The roll storage devices 8A and 8B dedicated to the second intermediate roll and the roll storage devices 7A and 7B dedicated to the backup rolls, which are sufficient if they are arranged at a position close to 2, or the rolls are rearranged in a long cycle, are subjected to multi-stage rolling. It is also possible to arrange it at a place away from the machine 2. [I-1- (2)]. The trolley exchanging device 3 is a trolley exchanging device 3 in which at least two trolleys 9 and 10 are loaded, and one of the trolleys can be moved toward the guide rail 4. Although the drawing shows the state in which the trolley 9 is selected, the roll attaching / detaching devices 11, 1 with different target rolls are provided above the trolleys 9, 10, respectively.
2 is installed. [I-2]. Outline of Operation in Roll Changing Device Now, it is assumed that the roll attaching / detaching device 11 dedicated to the work roll is mounted on the trolley 9 selected by the trolley changing device 3. First, the carriage 9 travels to the right along the guide rail 4 and stops at a position laterally attached to the roll storage device 6A that supplies a new work roll. Then, after the new work roll is supplied from the roll storage device 6A to the roll attachment / detachment device 11, the trolley 9 travels to the left this time, and stops again on the side of the multi-stage rolling mill 2 (the trolley exchange device 3). To do.

After the upper housing UH is raised in the multi-high rolling mill 2, the roll desorption device 11 is operated to extract the old work rolls from the multi-high rolling mill 2.
After the completion, the new work roll is continuously inserted without the need for traveling of the carriage 9. Then, the carriage 9 travels to the right and stops at a position laterally attached to the roll storage device 6B for collecting the old work rolls, and the roll storage device 6B collects the old work rolls from the roll detaching device 11.

When the rolls of other work rolls are changed at the same time when the work rolls are changed, the new work roll is inserted after the old work roll is completely removed by the roll attaching / detaching device 11. Instead, the old work roll is collected in the roll storage device 6B. Then, when the carriage 9 is returned to the carriage exchanging device 3, the roll attaching / detaching device 11 is replaced with respect to the carriage 9 (first, the roll attaching / detaching device dedicated to the first intermediate roll is placed). The target roll is pulled out by the roll detaching device. After that, if necessary, these replacements and a series of roll extracting operations are repeated.

Then, the required final removal of the old roll and the insertion of the new roll in the corresponding roll are performed, and the replacement of the roll attachment / detachment device and a series of roll insertion operations are performed in the reverse order. . [II]. Configuration of each part of roll changing device and multi-stage rolling mill [II-1]. As shown in FIG. 2, the trolley exchanging device 3 is provided with a traverse base 14 that is movable in a direction that is orthogonal to the guide rails 4 (see FIG. 1) in the recess 13 that is one step lower than the basic surface GL.
And first and second short rails 15 and 16 laid on the traverse base 14 and parallel to each other. First
The short rails 15 and the second short rails 16 are provided such that their longitudinal directions are oriented in the same direction as the guide rails 4 and at the same height level, and the traverse base 14 is located in one of the front and rear directions (for example, the rear position). ), The first short rail 15 and the guide rail 4 are connected, and when the traverse stand 14 is stopped at the other side (front position), the second short rail 16 and the guide rail 4 are connected. It is like this.

The traverse table 14 has a basic surface GL.
Slide floor plate 17 for closing the concave portion 13 opening to the
Is attached. The installation position of the cart exchanging device 3 is not limited to the vicinity of the multi-stage rolling mill 2 and may be anywhere in the longitudinal direction of the guide rail 4. For example, roll storage devices 6A, 6 dedicated to work rolls having a high roll changing frequency
B is arranged near the multi-stage rolling mill 2, roll accommodating devices 5A and 5B dedicated to the first intermediate roll having the next highest frequency are arranged to the right of the multi-roll rolling mill 2, and the traverser device 3 is arranged, and then the roll rearrangement is performed. It is also possible to arrange the roll storage devices 8A and 8B dedicated to the second intermediate roll and the roll storage devices 7A and 7B dedicated to the backup roll, which are relatively infrequent. [II-2]. Improvements of multi-high rolling mill (No. 1) As shown in FIGS. 3 to 11, in the multi-high rolling mill 2, the upper and lower second intermediate rolls and the upper and lower first intermediate rolls are held in upper and lower housings by bearings. The conventional structure of urging tools with coil springs has been abolished,
The drawbacks caused by this conventional structure are eliminated. Then, when the upper housing UH is raised, not only the upper second intermediate roll UMR (2) and the upper first intermediate roll UMR (1) but also the upper work roll U
The WR also rises along with it so that it will not fall out.

That is, the upper second intermediate roll UMR (2)
Is held by a positioning device 20 (see FIG. 3), the upper first intermediate roll UMR (1) is held by a fall prevention device 21 (see FIG. 9), and the upper work roll UWR is held by a lifting device 22 (see FIG. 6). It is supposed to be retained. [II-2- (1)]. Positioning Device for Upper Second Intermediate Roll The positioning device 20 for holding the upper second intermediate roll UMR (2) has the two end side pivot portions 23 of the upper second intermediate roll UMR (2) as shown in FIGS. As shown, the frame body 2 is clamped by the pair of left and right clamp means 24.
The upper housing UH is made to hold the same via 5. The clamp means 24 is a frame body 25.
A holder portion 26 provided at the projecting end portion of the holder, a pair of L-shaped levers 27 provided so as to be swingable with respect to the holder portion 26 around a pivot portion 27a, and both levers 27 for the holder portion 26. And a driving tool 28 for causing a clamping operation in the form of mutual proximity and mutual separation.

A hydraulic cylinder or the like is used as the drive tool 28, and the direction of expansion and contraction of the cylinder rod 29 thereof is the direction in which the respective upper second intermediate rolls UMR (2) are attracted to the upper backup rolls UBR, that is, the respective directions. It is provided so as to match the bending direction. Further, the driving tool 28 operates the clamp means 24 by retracting the cylinder rod 29, and the upper second intermediate roll UMR (2).
Even after it comes to grasp the both end side pivot portions 23, it has a stroke enough to leave some reduction margin.
Accordingly, the upper second intermediate roll UMR (2) can be pressed against the upper backup roll UBR to perform incremental bending. For this reason, in the drive tool 26, the stroke corresponding to the operation of the lever 27 is used as the drive source as the clamp means 24, and thereafter, the stroke for moving the upper second intermediate roll UMR (2) in the bending direction. It can be said that the corresponding portion has a function as the hydraulic drive unit 30 for roll bending.

In the drive tool 28, when the cylinder rod 29 is extended, the both end side pivot portions 23 of the upper second intermediate roll UMR (2) are unclamped,
Since the action of pushing the upper second intermediate roll UMR (2) away from the upper backup roll UBR can be obtained, the roll surface can be protected at the time of roll change described later, which is preferable.

By the way, if the driving tool 28 as the driving source of the clamping means 24 and the hydraulic driving section 30 for roll bending are provided separately, only the incremental bending is performed on the upper second intermediate roll UMR (2). Not
In addition to being able to apply dickies bending,
The roll balance of the upper second intermediate roll UMR (2) can be performed (particularly, the levelness adjustment).

Of the positioning devices 20 forming a pair on the left and right sides of the multi-high rolling mill 2, at least the side on which rolls are changed (in the present embodiment, the right side of the multi-high rolling mill 2 as shown in FIG. 1).
The retreating mechanism 31 is provided for the frame body 25 of the above-mentioned one. The retracting mechanism 31 has a frame body 25 that is divided into a mounting frame 32 and a swing frame 34 that is held so as to be swingable left and right around a swing shaft 33. A rack 36 that is linearly moved by a rocking drive tool 35 such as a hydraulic cylinder is provided at 32, and a rack 36 is provided at the rocking frame 34.
A pinion gear 37 which meshes with the swing shaft 33 and rotates integrally with the swing shaft 33.
, Each attached. Therefore, the swing drive 3
As shown in FIG. 7, the swing frame 34
(That is, the clamp means 24) can be oscillated to the side of the multi-high rolling mill 2 in an open leg shape. As a result, the clamp means 24 does not interfere with the roll change of the upper second intermediate roll UMR (2) and the upper backup roll UBR. [II-2- (2)]. The positioning device for the lower second intermediate roll The lower second intermediate roll DMR (2) is held on the lower housing DH by being placed on the lower backup roll DBR. Also for 2), as shown in FIGS. 3 and 8, a positioning device 3 having the same configuration as the positioning device 20 is provided.
8 is provided. Therefore, the lower second intermediate roll D
With respect to MR (2), it is possible to obtain the same effects as the above-mentioned various actions (roll bending, roll balance, etc.) on the upper second intermediate roll UMR (2). [II-2- (3)]. The fall prevention device 21 for holding the upper first intermediate roll UMR (1) is attached to both end side pivots 40 of the upper first intermediate roll UMR (1) as shown in FIG. As shown in FIG. 4, the downward step surface 40a protruding forward or backward is used to form a pair of left and right support pieces 4
It came to be supported by 1. Each support piece 41
Can be engaged with and disengaged from the step surface 40a as required by a drive mechanism 42 using a hydraulic cylinder or the like. The fall prevention device 21 is provided on the inner surface side of the upper roll cover URC (see FIG. 39) attached to the upper housing UH. Therefore, if the upper roll cover URC is opened after the upper work roll UWR and the upper first intermediate roll UMR (1) are pulled out, the fall prevention device 21 changes the rolls for the upper second intermediate roll UMR (2) and the like. It won't get in the way.

In the multi-stage rolling mill 2, the upper first intermediate roll UM
Since R (1) is made up of two pairs of front and rear, and these two are combined in the middle with the key member 43 (see FIG. 3), the fall prevention device 21 is also paired at the front and rear according to this. It is supposed to be done. That is, the support pieces 41 are paired on the left and right sides, but also form a set on the front and rear sides (that is, there are a total of four pieces). The mechanism 42 is operated synchronously (in order to make the pair of support pieces 41 on the left and right parallel to each other and to bring the pair of support pieces 41 on the front and rear sides close to and away from each other). [II-2- (4)]. Lifting device for upper work roll The lifting device 22 for holding the upper work roll UWR is
As shown in FIG. 6, with respect to both end side pivotal shaft portions 45 of the upper work roll UWR, the engagement concave portions 4 recessed in the end surfaces thereof.
A pair of left and right L-shaped lifting pieces 46 are engaged with the inside of 5a. These lifting pieces 46 are configured to swing up and down by an engagement / disengagement drive mechanism 47 that uses a hydraulic cylinder or the like.
The engagement and disengagement for 5a is performed. Also, the lifting piece 46 is
A lift drive mechanism 48 using a hydraulic cylinder or the like moves up and down together with the engagement / disengagement drive mechanism 47.
49 is a potentiometer for distance detection.

With such a lifting device 22, a space can be formed between the upper work roll UWR and the lower work roll DWR when the upper housing UH is raised. This space is used for the roll holders 114 and 11 described later.
5 (refer to FIG. 13) and 131, 132 (refer to FIG. 19). As described above, since the engagement / disengagement drive mechanism 47 and the elevating / lowering drive mechanism 48 are separately provided, it is possible to handle several types of upper work rolls UWR having different diameters. Moreover, the upper work roll UWR is held while the upper work roll UWR is held by the lifting piece 46.
Since the WR can be used to press the upper first intermediate roll UMR (1) strongly, the upper work roll UWR can be slightly bent. Further, with this structure, since the roll balance in the upper work roll UWR can be adjusted, there is also an advantage that the rolling can be started from the time when the leading end of the rolled material is passed at the time of starting the rolling.

On the other hand, when the upper work roll UWR is pulled out or inserted into the multi-high rolling mill 2, the holding level of the upper work roll UWR is moved to a position slightly lower than the upper first intermediate roll UMR (1). The transition can be made so as not to come into contact with the upper first intermediate roll UMR (1) or the like. As a result, the upper work roll UWR and the upper first intermediate roll UMR (1)
It is possible to prevent the roll surface from being scratched.

This hoisting device 22 also has an upper housing UH.
It is provided on the inner surface side of the upper roll cover URC attached to the. Therefore, if the upper roll cover URC is opened after the upper work roll UWR and the upper first intermediate roll UMR (1) are pulled out, the lifting device 2
2 does not hinder the roll rearrangement for the upper second intermediate roll UMR (2) and the like. [II-2- (5)]. Knockout device for lower work rolls When the upper housing UH is raised, the upper work rolls UWR are configured such that a loading space for a roll holder is formed in the lower part by the lifting device 22 as described above. First lower part for lower work roll DWR
A knockout device 55 as shown in FIG. 8 is provided in order to form a charging space for the roll holder with the intermediate roll DMR (1).

The knock-out device 55 includes an L-shaped lifting piece 56 which can come into contact with both end side pivot parts 45 of the lower work roll DWR from below and a lower first intermediate roll DMR (1). From the state where the lifting piece 56 retracts, the lower work roll DWR becomes the lower first intermediate roll DMR.
It is composed of a drive mechanism 57 such as a hydraulic cylinder for moving the lifting piece 56 up and down within the range up to the state of (1). The drive mechanism 57 is provided on the inner surface side of the lower roll cover DRC attached to the lower housing DH. Therefore, the lower work roll DWR
If the lower roll cover DRC is opened after pulling out the lower first intermediate roll DMR (1) and the like, the knockout device 5
5 does not hinder the roll rearrangement for the lower second intermediate roll DMR (2) and the like. [II-2- (6)]. Other Embodiments of Lifting Device and Knockout Device In addition, such a lifting device 22 and the knockout device 5
5 is not limited to being attached to the upper roll cover URC and the lower roll cover DRC of the multi-high rolling mill 2. For example, since the upper and lower first intermediate rolls usually have a structure in which both end side pivot portions 40 are rotatable relative to the roll body (not shown), the pivot portions 40 are not shown. As shown in FIG. 11, the lifting device 22 is used.
To the pivot part 40 of the upper first intermediate roll UMR (1) and the knockout device 55 to the lower first intermediate roll DMR (1).
Can be provided on each of the pivot portions 40 of the. Since the lifting device 22 shown in FIG. 11 does not include the lifting drive mechanism 48 (see FIG. 6) as described above, the lift of the upper housing UH is used to move the upper work roll UWR upward. It is designed to be lifted together with the first intermediate roll UMR (1). [II-3]. Improvements of multi-high rolling mill (Part 2) By the way, the upper and lower second intermediate rolls can be roll-bended and roll-balanced by the positioning devices 20 and 38, and the upper work roll UWR is also
As described above, the roll bending and the roll balance can be performed by the lifting device 22. In view of these circumstances, it goes without saying that it is preferable to be able to perform roll bending or the like on the lower work roll DWR and the upper and lower first intermediate rolls.

Therefore, the lowering devices 60 and 61 (see FIGS. 3 and 4) are provided for the upper and lower first intermediate rolls, and the pressing device 62 (see FIGS. 4 and 10) is provided for the lower work roll DWR. ), A lifting device 63 (see FIGS. 4 and 10) is provided for the purpose of more positive roll bending of the upper work roll UWR. [II-3- (1)]. When providing these rolling down devices 60, 61, the pushing down device 62, and the pushing up device 63, a pair of left and right side parts of the multi-stage rolling mill 2 are provided as shown in FIGS. The gate body 65 is provided.

The gate body 65 includes a pair of front and rear struts 66 standingly held inside the lower roll cover DH, and both struts 66.
And a erection body 67 passed between the two. Further, at least the gate body 65 arranged on the side where rolls are changed with respect to the multi-stage rolling mill 2 (on the right side in this embodiment as shown in FIG. 1).
In regard to the above, the erection body 67 is divided into a front half body 68 and a rear half body 69, and has a structure that opens and closes in a double door shape around the front and rear columns 66, respectively. This prevents the work rolls and other rolls from being changed. 70 is a front half body 68 using a hydraulic motor or the like
And an opening and closing drive for the rear half 69. [II-3- (2)]. Reduction device for upper first intermediate roll Reduction device 60 for upper first intermediate roll UMR (1)
Is adapted to apply upward pressure reduction by means of hydraulic pressure reduction means 75 such as a hydraulic cylinder to the downwardly facing step surface 40a provided on both end side pivot portions 40 of the upper first intermediate roll UMR (1). There is. By adopting the hydraulic pressure reducing means 75 in this way, the overall size can be reduced and a large output can be obtained. As a result, the upper first intermediate roll UMR (1) can be brought into pressure contact with the upper second intermediate roll UMR (2) to cause roll bending, or the roll balance can be adjusted. [II-3- (3)]. Reduction device for lower first intermediate roll The reduction device 61 for the lower first intermediate roll DMR (1) is substantially the same as the above, and the lower first intermediate roll DMR (1)
Upwardly facing step surface 40b provided on both end side pivots 40
On the other hand, downward pressure is applied by hydraulic pressure reduction means 76 such as a hydraulic cylinder. In this case, only the action of roll bending is possible.

The reduction devices 60 and 61 are displaced in the left-right direction (that is, the axial direction of the first intermediate roll) (see FIG. 4) so that the respective lifting strokes do not interfere with each other and there is a sufficient margin. Is ensured. [II-3- (4)]. Lowering device for lower work rolls The lowering device 62 for the lower work rolls DWR is, as shown in FIG. 10, a left and right side that can come into contact with the upper outer peripheral surfaces of both end side pivot parts 45 of the lower work rolls DWR. It is composed of a pair of push-down rollers 80 and a drive mechanism 81 for synchronously advancing and retracting the left and right push-down rollers 80 in the direction along the pass line P (see FIG. 39). The push-down roller 80 is rotatable around a rotation shaft 82. A hydraulic cylinder or the like is used for the drive mechanism 81.

As shown in the figure, the push-down device 63 is preferably provided so as to face both the front and rear sides of the lower work roll DWR. In this case, the four front and rear drive mechanisms 81 are synchronized. (The left and right push-down rollers 80
Push-down rollers 80 that make them parallel to each other and form a pair at the front and rear
They should be activated so that they move close to each other and away from each other.

With such a structure, the drive mechanism 81
When the push-down roller 80 is pressed against the lower work roll DWR by means of this, a wedge-like sinking force is generated in the lower work roll UWR, and this is strongly pressed against the lower first intermediate roll DMR (1) (ie, , Roll bending). [II-3- (5)]. Push-Up Device for Upper Work Roll The push-up device 63 for the upper work roll UWR is provided with respect to both end side pivots 45 of the upper work roll UWR when the upper housing UH is in the lowered position, as shown in FIG. It has a pair of left and right push-up rollers 83 that can come into contact with the outer peripheral surface of the lower part of the push-up roller 83. The push-up roller 83 is fitted on the rotary shaft 82 common to the push-down roller 80 of the push-down device 62. Common drive mechanism 81
It is designed to move back and forth. Thus, the push-up device 63 is inseparably integrated with the push-down device 62 (see FIG. 4).

With such a configuration, when the push-up roller 83 is pressed against the upper work roll UWR by the drive mechanism 82 when the upper housing UH is at the lowered position, the upper work roll UWR is pushed up like a wedge. It can generate power. Therefore, at this time, when the upper housing UH is not raised, the upper work roll UWR can be strongly pressed against the upper first intermediate roll UMR (1) (that is, roll bending is performed). It is also possible to adjust the roll balance of the upper work roll UWR. Therefore, there is also an advantage that the rolling can be started from the time of passing the leading end of the rolled material at the time of starting the rolling. On the other hand, if the upper housing UH is raised so as to be synchronized with the pressing of the push-up roller 83,
The upper work roll UWR can also be raised together (while being in contact with the upper first intermediate roll UMR (1)). [II-4]. Bogie used in the roll changing device As described above, the roll accommodating devices 5A, 5B to 8A, 8B provided on the roadside portions (both sides along the guide rail 4) along which the bogies 9 and 10 travel are various rolls. Each of the roll desorption devices 11 and 12 has a different structure dedicated to each roll, and different types (including roll desorption devices 85 and 86 described later) dedicated to various rolls are also prepared. .

On the other hand, one of the carts 9 is provided with a roll attaching / detaching device 11 for the work rolls (see FIG. 13), a roll attaching / detaching device 85 for the first intermediate rolls (see FIG. 26), and a second intermediate roll. Roll desorption device 86 (see FIG. 32)
Compatible with the other trolley 10
Is dedicated to the roll attaching / detaching device 12 (see FIG. 34) dedicated to the backup roll. [II-4- (1)]. The trolley having compatibility The trolley 9 includes a main body frame 90 which is box-assembled with a shaped steel or the like as shown in FIG. The upper frame 92 provided and the advancing / retreating piece 9 provided on the upper frame 92.
3 and a sub advancing / retreating device 94 having the same. Reference numeral 95 is a wheel rolling on the guide rail 4.

Although not shown in the drawing, this trolley 9 is
It travels by a self-propelled system equipped with a remote traveling drive means or a traveling motor by rope transmission or chain transmission, and at a predetermined stop position with respect to the multi-stage rolling mill 2 and various roll storage devices (5A, 5B, etc.), for example, anchor pins. Positioning means (not shown) such as driving the base into the foundation floor is adopted.

The middle frame 91 is vertically movably held by vertical rails 96 fixed inside the four corners of the main body frame 90 via sliding guides 97. A pair of left and right worm jacks 98 is provided between the bottom of the middle frame 91 and the bottom of the main body frame 90. One warm jack 98
Is driven by a rotating tool 99 such as a hydraulic motor, and the transmission shaft 1
The other worm jack 98 is also linked via 00. In this way, the middle frame 91 can be moved up and down with respect to the main body frame 90. Reference numeral 101 is a lift stroke detector such as a rotary encoder. Such an elevating structure of the middle frame 91 has an elevating mechanism 102 for elevating a roll holding body of the roll attaching / detaching device 11 or the like when various trolley attaching / detaching devices 11 or the like to be described later are mounted on the carriage 9. It is what constitutes.

The upper frame 92 is slidably guided by a pair of left and right horizontal rails 103 fixed to the upper part of the middle frame 91.
A pair of left and right forward / backward drive tools 105, such as a hydraulic cylinder provided in the middle frame 91, are held so as to be movable back and forth via
(Refer to FIG. 27), it is possible to move back and forth with respect to the middle frame 91. Such a front-back movement structure of the upper frame 92 is for relocating the roll attaching / detaching device 11 or the like in a direction parallel to the pass line P when the roll attaching / detaching device 11 or the like described later is mounted on the carriage 9. Shift mechanism 1
06 is configured.

The sub advancing / retreating mechanism 94 is adapted to move the advancing / retreating piece 93 in the left-right direction (axial direction of various rolls set in the multi-high rolling mill 2). In this embodiment, the advancing / retreating piece 93 is moved. A ball screw mechanism that uses itself as a nut member is adopted. Reference numeral 107 is a rotary drive tool such as a hydraulic motor. A guide rail 108a is provided on the upper surface of the upper frame 92 so as to sandwich the forward / backward passage of the forward / backward piece 93. This guide rail 108a is a slide guide 1 provided in various roll attaching / detaching devices 11, 85, 86, etc. described later.
The advance / retreat guide means 180 is configured in combination with 08b or 108c. The sub advancing / retreating mechanism 94 may or may not be used depending on the type of the roll attaching / detaching device 11 mounted on the carriage 9. [II-4- (2)]. The trolley 10 equipped with the roll unloading / attaching device 12 for backup rolls, which is exclusively used for the roll unloading / attaching device for backup rolls, is simple in that the wheels 95 are provided on the main body frame 109 as shown in FIG. [II-5]. Roll Desorption Device Dedicated to Work Rolls (Part 1) FIGS. 13 to 18 show a first embodiment of the roll desorption device 11 dedicated to work rolls. The roll attachment / detachment device 11 has a slide guide 108b and is provided with a carriage 9
The base plate portion 110 held by (the guide rail 108a of the sub advancing / retreating mechanism 94) and the two front and rear slide booms 111, 112 that are long in the left-right direction (the axial direction of the work roll set in the multi-stage rolling mill 2), It comprises an advancing / retreating mechanism 113 for advancing / retreating in the same direction with respect to the base plate section 110, and a pair of front and rear roll holders 114 and 115 provided on each slide boom 111, 112. [II-5- (1)]. The advancing / retreating mechanism 113 includes a roll assembly 116 provided on the substrate 110 and each slide boom 1 with respect to the substrate 110.
It comprises an advancing / retreating drive member 117 for advancing / retreating the respective 11, 112. The roll assembly 116 is for each slide boom 11
1, 112 are slidably held with their upper and lower surfaces sandwiched. As the advancing / retreating drive member 117, a hydraulic cylinder having an advancing / retreating stroke longer than the entire length of the work roll is used. Therefore, this forward / backward drive tool
The work rolls can be pulled out and inserted into the multi-high rolling mill 2 only by the operation of 7, and it is not necessary to borrow the operation of the sub advancing / retreating mechanism 94. [II-5- (2)]. Each of the roll holders 114 and 115 is composed of an upper fork portion 118 and a lower fork portion 119, and a spacing mechanism 120 that allows the vertical arrangement of both fork portions 118 and 119 to be relatively variable. The upper fork part 118 supports the upper work roll UWR, and the lower fork part 119 supports the lower work roll DWR. However, regarding their sectional structures, those arranged in the front side (the front roll holder 114 And the rear side arrangement (the rear roll holder 115 has) have the front and rear directions reversed. That is, the upper and lower fork parts 118 and 119 arranged on the front side.
In contrast, the front side portion (the lower side in FIG. 14) near the protruding end has a planar shape as if cut away, while the upper and lower fork portions 118 and 119 arranged on the rear side have the rear side closer to the protruding end. It has a planar shape such that the side portion (upper side in FIG. 14) is cut off.

The difference in cross-sectional structure is that the front roll holder 114 is dedicated to loading a new work roll, while the rear roll holder 115 is dedicated to collecting old work rolls. Has occurred. That is, the upper and lower fork portions 118 and 119 arranged on the front side are for avoiding interference with the roll storage device 6A (supply-only machine) arranged on the front side (lower side in FIG. 1) of the guide rail 4 (see FIG. 23). The forks 118 and 119 arranged on the rear side are the same as those on the rear side (see FIG. 1).
In order to avoid the interference with the roll storage device 6B (recovery-dedicated machine) arranged on the upper side, the cross-sectional structure is provided.

Both upper and lower fork parts 118, 11 arranged on the front side
The cross-sectional structure will be described with reference to FIG. 9 as an example. At the tip end side, a one-side inclined structure having a bearing pad 121 that contacts only the lower surface of the rear side of the work roll as shown in FIG. In the central portion, as shown in FIG. 15 (b), the support pad 121 that contacts both the front and rear lower surfaces of the work roll.
And has a notch 122 formed in the center, and has a “reverse C-shaped” double-sided inclined structure.
As shown in FIG. 15C, the support pad 121 is not provided, and the notch 122 does not extend to form a "dogleg" -shaped inclined structure on both sides.

A soft metal material, resin, rubber or the like is used for the support pad 121, and the support pad 121 is located near both ends of the work roll, that is, the position of the center of gravity of the work roll in the axial direction (approximately in the longitudinal direction). Since a plurality of points are brought into contact with each other with the (center position) interposed therebetween, the work roll can be stably held without being distorted or damaged.

The notch 122 formed in the upper fork 118 avoids interference with the lifting device 22 (see FIGS. 6, 9, 11) for the upper work roll UWR provided in the multi-high rolling mill 2. The cutout portion 122 formed in the lower fork portion 119 avoids interference with the knockout device 55 (see FIGS. 8 and 11) for the lower work roll DWR provided in the multi-stage rolling mill 2. This is a measure for

Then, these roll holders 114 and 11
5 is an alternative position to the operation center position (see CL in FIG. 14) for the multi-stage rolling mill 2 by the operation of the shift mechanism 106 (see FIGS. 12 and 27) provided on the carriage 9 as described above. It is designed to be used. Therefore, after the old work roll set in the multi-stage rolling mill 2 is extracted by the roll holding body 115, the new work roll is inserted into the multi-stage rolling mill 2 by the roll holding body 114 immediately after the operation of the shift mechanism 106. The operation can be performed continuously. Therefore, highly efficient roll combination can be expected.

As shown in FIG. 16, the space adjusting mechanism 120 includes a lower bracket portion 123 extended and fixed to the projecting end portion of the slide boom 111 or 112, and a left guide portion 124 (see FIG. 17) on the lower bracket portion 123. And a lift means using an upper bracket portion 126 movably held up and down via a right guide portion 125 (see FIG. 18) and a toggle link mechanism interposed between the upper and lower bracket portions 126, 123. 127 and a driving means 128 such as a hydraulic cylinder for operating the lifting means 127. The upper bracket portion 126 has an upper fork portion 1
18, the lower bracket portion 125 has a lower fork portion 11
9 are attached respectively. Therefore, by the operation of the driving means 128, the holding height of the upper fork portion 118 with respect to the lower fork portion 119 can be changed while the upper fork portion 118 remains horizontal.

Therefore, the pitch between rolls (the upper housing UH is raised and the upper work roll UWR is held by the lifting means 22 by using rolls having different diameters for the upper and lower work rolls set in the multi-high rolling mill 2. And the lower work roll DWR has knockout device 5
Even if the pitch between the two rolls when held at 5) is changed variously, the spacing adjusting mechanism 12 is provided each time.
By performing the pitch adjusting operation of the upper and lower fork portions 118 and 119 by 0 and the overall level adjusting operation by the elevating mechanism 102 provided on the carriage 9, the space formed below the work rolls is reduced. It is possible to position the upper and lower fork portions 118 and 119 at a level at which they can be inserted. In addition, the upper and lower fork parts 118,
By operating the elevating mechanism 102 with the 119 inserted, the lower outer peripheral surfaces of both work rolls can be supported at substantially the same time, or the support can be released at substantially the same time. [II-6]. Roll Desorption Device Dedicated to Work Roll (Part 2) FIGS. 19 to 21 show a second embodiment of the roll desorption device 11 dedicated to a work roll. This second
In the embodiment, the most different point from the first embodiment is that
The upper and lower work rolls are configured to be held by clamping both end side pivot portions 45, and the upper and lower work rolls that are clamped and held can be exchanged in the vertical positional relationship. It is in.

That is, the roll attaching / detaching device 11 has a rotating device 129 having a shape in which a cylindrical body is laid sideways.
It comprises. In the center of the rotating device 129, an erection structure 130 that advances and retreats by the advancing and retracting mechanism 113 is pierced in a horizontal skewered state.
Roll holders 131 and 132 are provided near the tip of 0. [II-6- (1)]. The rotating device rotating device 129 can rotate the erected structure 130 in a horizontal state. The rotating structure will be described later. As shown in FIG. 20, the rotating device 129 has a sliding guide tool 108c that fits into the guide rail 108a of the sub advancing / retreating mechanism 94 provided on the carriage 9. Therefore, in comparison with the first embodiment, the guide rail 1
It can be replaced through 08a. [II-6- (2)]. Advancing / Retracting Mechanism The advancing / retreating mechanism 113 is configured to move the erected structure 130 horizontally with respect to the rotating device 129 by the advancing / retreating drive tool 117, as shown in FIG. In addition, erection strip 1
The holding structure and the like of 30 will be described later. Also for this advancing / retreating drive tool 117, a hydraulic cylinder having an advancing / retreating stroke longer than the entire length of the work roll is used. Therefore, even in the roll attaching / detaching device 11 of the second embodiment, it is not necessary to borrow the operation of the sub advancing / retreating mechanism 94.

The erected strip 130 is made of H-shaped steel or the like, and due to its function, the slide-boom 130B is the portion near the base that moves forward and backward in the rotating device 129.
The portion of the roll holder 131, 132 near the projecting end will be described as the charging arm portion 130A. [II-6- (3)]. Roll holders The roll holders 131 and 132 are the charging arm portions 130A.
On the other hand, as shown in FIG.
They are symmetrically arranged so as to sandwich 0a. These roll holders 131 and 132 are a pair of roll holders that are vertically aligned along the side surface of the web 130a (for convenience of explanation, the upper holder in the state shown in FIG. 20 is the upper roll holder). Section 133, and the one arranged on the lower side is referred to as a lower roll holder section 134).

These upper and lower roll holder parts 133, 1
34 has a pair of left and right clamp means 135 (see FIG. 21) provided along the longitudinal direction of the charging arm portion 130A at intervals corresponding to both end side pivotal shaft portions 45 of the work roll. These clamping means 135 are a rotating disc 135a formed to have a diameter larger than the diameter of the pivot portion 45 of the work roll, and a pair of clamps projecting from the outer peripheral portion of the rotating disc 135a at opposite positions. Pin 13
5b, and this rotating disk 135a is driven by a driving tool 136 such as a hydraulic cylinder, and the transmission means 13 such as a link mechanism.
It can be rotated in the range of about 90 ° through 7. Needless to say, such a clamp means 135 is provided by the rotating device 129.
This is to prevent the work rolls in the holding state from falling out or being displaced when the 1, 132 are rotated.

With such a configuration, for example, work rolls having different roll crowns and roll diameters are initially clamped and held by the upper and lower roll holder parts 133 and 134, and the tri-and-roll mill in the multi-high rolling mill 2 is operated.・ While looking at the error situation, it is possible to select the appropriate one as the upper work roll or the appropriate one as the lower work roll, and the work efficiency can be improved. [II-7]. Work Roll Supply Dedicated Roll Storage Device FIGS. 22 to 25 show a roll storage device 6A (see FIG. 1) which is a work roll supply dedicated machine, and particularly, the roll attachment / detachment device 11 (of the first embodiment). 13 to 1
8)). As shown in FIG. 22, the roll storage device 6A has
A roll delivery device 140 is provided via a height switching mechanism 139. [II-7- (1)]. Height Switching Mechanism The height switching mechanism 139 includes a body frame 138 and the vertical rails 1 fixed inside the four corners of the body frame 138.
An inner frame 143 is held by 41 in a vertically movable manner via a slide guide tool 142, and an elevating tool 144 such as a hydraulic cylinder that elevates and lowers the inner frame 143 relative to the main body frame 138. Therefore, the operation level of the roll delivery device 140 (roll depositing piece 147 described later) is set to the upper fork portion 118 of the roll attaching / detaching device 11.
Alternatively, it can be fitted to either the lower fork portion 119. [II-7- (2)]. The roll delivery device 140 includes a pair of front and rear guide devices 14 provided on the left side portion and the right side portion of the inner frame 143.
5, a roll feed base 146 held by these guide devices 145 to be movable back and forth, and the roll feed base 14
6, a plurality of (four in the drawing) roll depositing pieces 147 provided at predetermined intervals in the front-rear direction, and an advancing / retreating tool such as a hydraulic cylinder for driving the roll feed base 146 to advance / retreat with respect to the inner frame 143. 148 and. Further, the inner frame 143 is provided with a pair of left and right roll supporting portions 149 on both sides of each roll depositing piece 147 (FIG. 23).
For reference, FIG. 22 shows only the roll bearing 149 which is closest to the guide rail 4.

As shown in FIGS. 24 and 25, the guide device 145 is such that a bracket 154 holding a wheel 153 rotatably is moved up and down by a lifting tool 152 such as a hydraulic cylinder. And this foil 1
53 is fitted to a pair of left and right horizontal rails 155 provided on the roll feed table 146. Therefore, the roll feed base 146 is capable of advancing and retracting and moving up and down with respect to the inner frame 143 toward the guide rail 4.
By combining these movements, the roll depositing piece 147 is subjected to a rectangular repetitive motion of ascending on the inner frame 143 side, advancing to the guide rail 4 side, descending at the advancing position, and retracting to the inner frame 143 side. Can be done. Normally, each roll deposit piece 147 is stopped at a position below each roll support portion 149,
The new work roll is supported by each roll support portion 149.

Therefore, the roll depositing piece 147 above-mentioned.
By this operation, the work roll supported by the roll supporting portion 149 closest to the guide rail 4 is moved to the front and the bottom fork portions 118 and 119 of the roll detaching device 11 (close to the roll storing device 6A) (operation of the shift mechanism 106). To the roll storage device 6A),
The roll bearing 1 located near the guide rail 4 from the roll bearing 149 located far from the guide rail 4 (on the left side in FIG. 22).
The work rolls can be sequentially transferred to 49. It should be noted that the roll depositing piece 147 closest to the guide rail 4 and the upper and lower fork portions 118 and 119 do not interfere with each other as shown in FIG. [II-8]. Roll storage device dedicated to collection of work rolls The roll storage device 6B (see FIG. 1) dedicated to collection is substantially the same in structure except that the roll storage device 6A dedicated to supply is inverted. As mentioned above.

However, the operating condition is opposite, and the movement of the roll depositing piece 147 is kept in the lowered state while the guide rail 4 is being moved.
Advancing to the side, rising at the advancing position, inner frame 143
The upper and lower fork parts 118 on the rear side (close to the roll storage device 6B) of the roll attachment / detachment device 11 are configured to perform a recursive rectangular motion of retreating to the side and descending on the inner frame 143 side. The old work rolls are collected from 119 (closed to the roll storage device 6B by the operation of the shift mechanism 106), or sequentially from the roll support portion 149 closest to the guide rail 4 and the roll support portion 149 positioned farthest from the guide rail 4. The work roll can be sent to. [II-9]. Roll Desorption Device Dedicated to First Intermediate Roll (Part 1) FIGS. 26 to 29 show a first example of the roll desorption device 85 dedicated to the first intermediate roll. The roll attaching / detaching device 85 includes a rotating device 129 having a horizontal erection structure 130, and a roll holding body 1 provided on a charging arm portion 130A near the projecting end of the erection structure 130.
60, and an advancing / retreating mechanism 113 (advancing / retreating drive tool 117) for horizontally advancing / retreating the erected structure 130 with respect to the rotating device 129. Regarding the rotating device 129 and the advancing / retreating mechanism 113, the second device of the roll attaching / detaching device 11 for the work roll is used.
It is common to the one used in the embodiment (see FIG. 19), and therefore, in this embodiment, the specifications including the carriage 9 can be changed only by replacing the erected structure 130 with a slightly different length or structure. You can do it.

The erection strip 130 used in the roll attaching / detaching device 85 has a slide boom 130B portion and a charging arm portion 130A portion formed of different H-shaped steels and connected to each other. [II-9- (1)]. The roll holder 160 holds the roll holder 160 with respect to the charging arm portion 130A.
It has a pair of left and right clamp means 161 provided at intervals corresponding to both end side pivotal shaft portions 40 of the first intermediate roll. Inside the multi-stage rolling mill 2, the fall prevention device 21 (see FIG. 9) for holding the pivot portion 40 of the upper first intermediate roll UMR (1) and the upper and lower rolling devices 60, 61 (FIG. 3).
In order to prevent interference with the clamp means 161, the mutual intervals of the clamping means 161 are made slightly smaller (a little wider than the effective roll length). These clamping means 1
Reference numeral 61 denotes the web 13 as an H-shaped steel as shown in FIG.
0a is sandwiched between the pair of claw brackets 162, swing claw pieces 163 swingably held by these claw brackets 162, and these swing claw pieces 163 are individually driven. Driving tool 164 such as a hydraulic cylinder
It consists of and. Each of the driving tools 164 is adapted to synchronously perform the extension movement and the contraction movement to open and close the swinging claw pieces 163.

Since the first intermediate rolls are a set of two with the key member 43 sandwiched between them, when the rocking claw pieces 163 are closed, both the first intermediate rolls are closed. Hold the clamps as if they were squeezed from both sides. [II-9- (2)]. As shown in FIG. 29, the rotating device rotating device 129 includes an outer cylinder portion 170.
A middle cylinder portion 172 rotatably accommodated in the outer cylinder portion 170 via a bearing 171; and a boom holding plate 173 attached to both ends of the middle cylinder portion 172 so as to rotate integrally therewith. Comprising. A drive tool 174 (see FIG. 27) such as a hydraulic motor having an axis centered in the tangential direction of the middle tube section 172 is attached to the upper portion of the outer peripheral section of the outer cylinder section 170, and a worm is attached to the rotary shaft of the drive tool 174. 175 is provided,
A ring-shaped rack 176 that meshes with the worm 175 is provided on the outer peripheral surface of the middle tubular portion 172.

Further, the boom holding plate 173 is provided with a guide roller 177 for slidably holding the upper and lower surfaces of the slide boom 130A in a sandwiched state. Since such a rotation device 129 is provided, the orientation of the clamp means 161 in the roll holder 160 is set to the downward orientation (the orientation shown in FIG. 28) below the charging arm portion 130A, or conversely. The upper side of 130A may be in an upward posture (not shown). Since the holding level of the clamped first intermediate roll and the set level of the first intermediate roll in the multi-high rolling mill 2 are different between when the clamp means 161 is turned downward and when it is turned upward, the carriage 9 Lifting mechanism 102 provided in the
Actuate (see FIG. 12) to adjust this.

As a result, one roll holder 160 can be used to pull out and insert the upper first intermediate roll UMR (1) and also to pull out and insert the lower first intermediate roll UMR (2). It is also possible to reduce the size of the device. [II-9- (3)]. Advancement / Retraction Mechanism When the first intermediate roll is pulled out or inserted by the roll attachment / detachment device 85, the advancement / retraction stroke of the advancement / retraction mechanism 113 is insufficient because the first intermediate roll is longer than the work roll. Since it is adjusted to the work roll in order to prevent it, the operation of the sub advancing / retreating mechanism 94 (see FIG. 12) provided on the carriage 9 is also borrowed (see FIG. 26). [II-10]. Roll Desorption Device Dedicated to First Intermediate Roll (Part 2) FIG. 30 shows a second embodiment of the roll desorption device 85 dedicated to the first intermediate roll. The difference of the second embodiment from the first embodiment is that the upper first intermediate roll UMR (1) and the lower first intermediate roll DMR (1) are provided to the multi-stage rolling mill 2 in total of four rolls. At the set level (set level when the upper housing UH is raised), it is possible to clamp and hold at the same time. [II-10- (1)]. Roll holding body As a structure therefor, the roll holding body 160 includes swinging claw pieces 163 on both upper and lower portions of the charging arm portion 130A.
It is equipped with a clamping means 161 adapted to point. The structure of the clamp means 161 itself is the first except that the pair of upper and lower swing claw pieces 163 are operated by the drive tool 164.
Since this is almost the same as the embodiment (see FIG. 28), the description is omitted here. Of course, since the rotating device 129 as described above is not necessary, the time required to operate the rotating device 129 can be shortened. [II-10- (2)]. The advancing / retreating mechanism 113 includes an attaching frame body 179 and the attaching frame body 1
It comprises a roll assembly 180 provided at 79 and an advancing / retreating drive member 117 such as a hydraulic cylinder for advancing / retreating the erected strip 130 with respect to the mounting frame 179. The roll assembly 180 slidably holds the upper and lower surfaces of the erected structure 130 (slide boom 130B) while sandwiching the upper and lower surfaces. The mounting frame body 179 has a sliding guide tool 108d slidably fitted to the guide rail 108a of the sub advancing / retreating mechanism 94 provided on the carriage 9 (see FIG. 12). Therefore, it can be replaced with another roll attaching / detaching device through this guide rail 108a. When the first intermediate roll is pulled out or inserted, the sub advancing / retreating mechanism 94 is operated. [II-11]. Roll Storage Device for Dedicated Supply of First Intermediate Roll FIG. 31 shows a roll storage device 5A (see FIG. 1) which is a dedicated machine for supply of the first intermediate roll, and in particular, the roll attachment / detachment device 85 of the first embodiment. (See FIG. 26 to FIG. 29). The roll accommodating device 5A is configured by providing a roll delivery device 182 on a main body frame 181 that is box-assembled with shaped steel or the like. [II-11- (1)]. Roll delivery device The roll delivery device 182 includes a pair of front and rear guide devices 145 provided on the left side portion and the right side portion (long side portion orthogonal to the axis of the first intermediate roll) of the main body frame 181,
The guide device 145 includes a roll feed base 183 held so as to be movable back and forth, and an advance / retreat tool 184 such as a hydraulic cylinder that drives the roll feed base 183 to move back and forth with respect to the main body frame 181. Also, the body frame 18
1 shows that when the guide device 145 lowers the roll feed table 183 to the lower position, it is positioned on the left and right sides of the roll feed table 183 above the roll support table 183. 185 is provided.

Since the guide device 145 has the same structure as that shown in FIGS. 24 and 25, its explanation is omitted here. 186 is a horizontal rail provided on the roll feed base 183. Therefore, the roll feed table 183 is
Ascending on the body frame 181, advancing to the guide rail 4 side, descending at the advancing position, body frame 181
It is possible to make a rectangular repetitive motion of retreating to the side. Normally, the roll feed base 183 is stopped at a position lower than the roll support portion 185, and the roll support portion 185 supports the new first intermediate roll.

Therefore, the roll feed table 183 above-mentioned.
By this operation, the first intermediate roll supported closest to the guide rail 4 is pushed out below the clamp means 161 in the roll attaching / detaching device 85, and the roll support portion 18 is provided.
Each of the other first intermediate rolls on 5 can be sequentially fed toward the guide rail 4. [II-12]. Roll storage device dedicated to collection of the first intermediate roll The roll storage device 5B dedicated to collection (see FIG. 1) is substantially the same in structure except that the roll storage device 5A dedicated to supply is turned upside down. That was mentioned above.

However, the operating condition is opposite, and the movement of the roll feed base 183 is kept in the lowered state and the guide rail 4
Advancing to the side, ascending at the advancing position, body frame 18
The rectangular reciprocating motion of retreating to the 1 side and lowering to the main body frame 181 side is performed, whereby the old first intermediate roll is collected from the roll attaching / detaching device 85, or the guide rail 4 is closest to the guide rail 4. First supported by
The intermediate rolls can be sequentially fed to the far side from the guide rail 4. [II-13]. Roll Desorption Device Dedicated to Second Intermediate Roll FIG. 32 shows a roll desorption device 86 dedicated to the second intermediate roll. The roll attaching / detaching device 86 is a roll attaching / detaching device 85 (see FIG. 2) dedicated to the above-described first intermediate roll.
(See 6) and has almost the same configuration. However, the positioning, shape and dimensional relationship of the clamp means 188 provided as the roll holding body 187 need to correspond to the both end side pivot portions 23 of the second intermediate roll as a matter of course, so in the present embodiment, the roll holding body is used. Construction body 187
Every 0, the rotating device 129 and the advancing / retreating mechanism 113 are replaced.

Inside the multi-high rolling mill 2, the second rolling mill
In order to prevent interference of the positioning devices 20, 38 (see FIGS. 3 and 7) for holding the intermediate rolls with the clamping means 24, the mutual spacing of the clamping means 188 is slightly smaller (a little wider than the effective roll length). It is set to about). The structure of the clamp means 188 may be the same as that of the clamp means 161 shown in FIG. 28, or may be the same as that of the clamp means 24 shown in FIG.

In the roll attaching / detaching device 86 thus constructed, the upper second intermediate roll UM in the multi-stage rolling mill 2 is
If the clamping means 188 cannot reach the radius of rotation of the rotating device 129 alone with respect to the respective arrangements of the R (2) and the lower second intermediate roll DMR (2), the lifting mechanism 102 provided on the carriage 9 is used. The operation of the shift mechanism 106 and the shift mechanism 106 are also performed in a composite manner to increase the radius of gyration. [II-14]. Roll Storage Device Dedicated to Supplying Second Intermediate Roll FIG. 33 shows a roll storage device 8A (see FIG. 1) which is a dedicated supply device for the second intermediate roll. This roll storage device 8A is also basically the same as the roll storage device 6A (see FIG. 31) dedicated to supplying the first intermediate roll.

That is, with respect to the main body frame 190,
The roll feed base 191 includes the guide device 145 and the advancing / retreating tool 19.
It comprises a roll delivery device 193 adapted to perform a rectangular reciprocating motion in response to a combination operation of the two.
However, in this roll delivery device 193, a plurality of (six in the drawing) roll depositing pieces 194 are provided above the roll feed base 191 at predetermined intervals in the front-rear direction.
Further, the main body frame 190 is provided with a pair of left and right roll support portions 195 on both sides of each roll deposit piece 194.

Therefore, the second intermediate roll supported by the roll supporting portion 195 closest to the guide rail 4 is moved by the rectangular repeating movement of the roll feed base 191 (each roll depositing piece 194) to the clamping means in the roll attaching / detaching device 86. 188 (Roll storing device 8 by rotating device 129)
The shift mechanism 106 is directed to the A side, and if necessary,
The second intermediate roll is sequentially fed from the roll support portion 195 positioned far from the guide rail 4 to the roll support portion 195 near the guide rail 4). It is a thing. [II-15]. The roll storage device 8B (see FIG. 1) dedicated to the recovery of the second intermediate roll
The roll storage device 8A for exclusive use of supply has a structure in which the roll storage device 8A is inverted, and the point that the repeated rectangular movement of the roll feed base 191 (each roll depositing piece 194) is in the opposite direction is that the roll storage device for the first intermediate roll is stored. This is similar to the case of the devices 6A and 6B. Therefore, the description here is omitted. [II-16]. Roll Desorption Device Dedicated to Backup Roll FIGS. 34 to 37 show the roll desorption device 12 dedicated to a backup roll. The roll attaching / detaching device 12 includes a body frame 109 provided on the carriage 10.
The rotation device 198 is held at a predetermined height by the roll rotation device 198, and the roll holder 200 provided on the rotation device 198 via the advancing / retreating mechanism 199. [II-16- (1)]. The rotating device 198 includes an outer cylinder portion 201 fixed horizontally to the main body frame 90 of the carriage 10, and the outer cylinder portion 2
01, about one half of which is inserted into one end, and the other half of the other end is provided with a rotary cylinder portion 202 provided in a state of protruding toward the multi-stage rolling mill 2 side (left side in FIG. 34).

As shown in FIG. 35, the rotary cylinder portion 202 is rotatably held by the bearing member 203 with respect to the outer cylinder portion 201. Then, in the lower portion of the outer peripheral portion of the outer tubular portion 201,
A drive tool 204 such as a hydraulic motor having an axis oriented in the tangential direction of the rotary cylinder section 202 is attached, a worm 205 is provided on the rotary shaft of the drive tool 204, and the worm 205 is provided on the outer peripheral surface of the rotary cylinder section 202. A ring-shaped rack 206 that meshes with 205 is provided. Therefore, the driver 204
With the operation of, the rotating cylinder portion 202 can be rotated around its central axis. It is of course possible to reverse the direction of rotation. In addition, since the transmission means by the engagement of the worm 205 and the rack 206 is used, a high torque can be obtained even by the relatively small driving tool 204.

The rotary cylinder portion 202 extends over substantially the entire length of the portion projecting from the outer cylinder portion 201, and the rotary cylinder portion 20.
A base frame portion 210 (see FIG. 37), which is further protruded toward the multi-stage rolling mill 2 side (left side in FIG. 34) than 2, is fixed. With such a rotating device 198, the roll holder 200 can be oriented in any direction around the rotating cylinder 202, and for the multi-high rolling mill 2, all upper backup rolls UBR and all lower backup rolls are provided. The roll DBR can be extracted and inserted. Therefore, the provision of one roll holder 200 is sufficient, and the size of the apparatus can be reduced. [II-16- (2)]. The advancing / retreating mechanism 199 is configured such that the roll holding member 200 is arranged along the longitudinal direction of the base frame portion 210 provided on the rotating tubular portion 202.
The guide frame 211 is provided over the entire length of the base frame part 210, and the loading arm part 215 of the roll holder 200, which will be described later, has a guide rail 211 as shown in FIG. A sliding guide 216 that fits in the 211 is provided. Further, at one end of the base frame part 210, a drive means 217 for driving the charging arm part 215 to move back and forth is provided. In this embodiment, the driving means 2
A ball screw mechanism was adopted as 17. That is, reference numeral 218 denotes a driving tool such as a hydraulic motor. The driving tool 218 rotates the ball screw 220 via the gear device 219, and the nut member 22 screwed to the ball screw 220.
The charging arm portion 215 moves forward and backward together with 1. The ball screw 220 has a span that allows the nut member 221 (the charging arm portion 215) to move back and forth by a distance larger than the entire length of the backup roll. [II-16- (3)]. The roll holder 200 includes a charging arm portion 215 that is long in the left-right direction (axial direction of the backup roll set in the multi-stage rolling mill 2), and a pair of left and right arms provided to the charging arm portion 215. Clamping means 223 and base frame 210
Of the rotating tubular portion 20 with respect to the end portion near the outer tubular portion 201 in
2 and a saddle guide 224 provided so as to project outward in the radial direction.

The charging arm portion 215 is formed so as to have a length substantially equal to that of the backup roll, and the clamp means 223 is provided near both ends thereof with a mutual interval corresponding to both end side pivot shaft portions 225 of the backup roll. Is designed to hold. As shown in FIG. 37, the clamping means 223 includes a hook body 226 that engages with the pivot portion 225 of the backup roll, and a fastening piece 227 that is movable inside the hook body 226 along the direction of expanding and contracting its inner diameter.
It comprises a driving tool 228 such as a hydraulic cylinder for driving the fastening piece 227.

The saddle guide 224 includes a support column 230 fixed to the base frame section 210, a holding arm 231 swingably connected at a projecting end of the support section 230, and a holding arm 231 provided on the support column 230. A drive tool 232 such as a hydraulic cylinder for swinging drive, a hook claw 233 swingably connected to the projecting end of the holding arm 231, and a hydraulic cylinder for swinging the hook claw 233 provided on the holding arm 231. Drive device 234, etc.

The hugging arm 231 has a curved shape capable of contacting the saddle SD of the backup roll along the outer peripheral surface of the fan-shaped protrusion, and the hook claw is directed toward the inside of the curved shape. When 233 is swung, it engages with the fan-shaped protruding portion in a state of holding it, and prevents the saddle SD from freely rotating. This saddle guide 224 is used when the charging arm portion 215 is retracted to the rotating device 198 (outer cylinder portion 201) side as shown by the chain double-dashed line in FIG. 34, and the clamping means 223 is used as the charging arm. When the backup roll is held so as to be laid adjacent to the portion 215, only the saddle SD closest to the rotating device 198 is engaged. Because, although illustration is omitted, in the backup roll,
This is because the saddles SD are connected to each other by a rotation-stopping connecting rod that is parallel to the support shaft of the backup roll, and the universal rotation of all saddles SD can be prevented by stopping the universal rotation of only one of them. The saddle guide 224 is used from the time when a new backup roll is received from the roll storage device 7A described later to the time when the new backup roll is conveyed to the multi-high rolling mill 2 and immediately before the insertion is started. This is because there is no need to use it at other times (for example, during a series of operations for extracting the old backup roll from the multi-high rolling mill 2).

In the roll holder 12 thus constructed, the multi-stage rolling mill 2 moves from the upper backup roll UBR.
First, the rotating device 198 is operated so that the clamp means 223 is horizontally oriented with the opening of the hook claw 232 facing upward (FIG. 3).
7 X1 position). Then, the advancing / retreating mechanism 199 is operated, and the upper work roll UWR and the upper first intermediate roll UMR of the multi-high rolling mill 2 are operated with the clamping means 223 being horizontally oriented.
(1) and the upper second intermediate roll UMR (2) are loaded and advanced into the space after being extracted. Then, the rotating device 198 is slightly actuated, and the hook claw 232 of the clamp means 223 is activated.
, The upper backup roll UBR located at the frontmost side
It is brought into a state (X2 position) where it is engaged with the pivot portion 225 of. Next, the clamp means 223 is operated in parallel with the holding release operation of the backup roll in the multi-stage rolling mill 2, and the backup roll is held alongside with a feeling of pulling it toward the charging arm portion 215 side. After that, the advancing / retreating mechanism 199 is operated in the reverse order of the above, and the backup roll is extracted.

After that, in the multi-high rolling mill 2, a space (for example, X
While the clamp means 223 is oriented in correspondence with the second position), the extraction is continued (toward the X5 position) sequentially to the adjacent backup roll. When inserting the upper backup roll UBR, the reverse operation (from the X5 position to the X1 position) is performed. However, as described above, this is performed in multiple stages from the time when the new backup roll is received from the roll storage device 7A described later. The saddle guide 224 is engaged with the saddle SD of the backup roll until it is inserted into the rolling mill 2, and a procedure for releasing the saddle guide 224 at the same time when the insertion is started is added.

Extraction (from the Y1 position to the Y5 position) and insertion (from the Y5 position to the Y1 position) of the lower backup roll DBR are substantially the same as the above procedure. [II-17]. Roll Storage Device Dedicated to Supplying Backup Rolls FIG. 38 shows a roll storage device 7A (see FIG. 1) which is a dedicated machine for supplying backup rolls. The roll storage device 7A is provided with a roll delivery device 241 and a roll feed device 242 with respect to the main body frame 240. [II-17- (1)]. Roll delivery device The roll delivery device 241 includes a main body frame 240 and a horizontal rail 243 provided on the main body frame 240 and long in the front-rear direction (direction orthogonal to the axis of the backup roll set in the multi-stage rolling mill 2). On the other hand, the reciprocating table 245 held so as to be able to move back and forth through the sliding guide 244.
And a reciprocating table 246 such as a hydraulic cylinder for driving the reciprocating table 245 forward and backward with respect to the main body frame 240, and a pair of left and right roll lifters 247 provided closest to the guide rails 4 of the reciprocating table 245. Roll lifter 24
7, the lifting piece 249 is moved up and down by a lifting tool 248 such as a hydraulic cylinder.

The roll delivery device 241 stands by for the roll lifter 247 to support the new backup roll with the lifting piece 249 lowered to the lower position, and when the backup roll is supplied to the roll detaching device 12. , Advancement of the reciprocating table 245 toward the guide rail 4, lifting piece 249 by the roll lifter 247
(Backup roll) rises, lift piece 249 descends after the backup roll is supplied, carriage 24
The operation of retreating 5 to the body frame 240 side is performed. [II-17- (2)]. The roll feeding device 242 includes a pair of front and rear guide devices 145 provided on the left and right sides of the reciprocating table 245.
(Similar to that shown in FIGS. 24 and 25), a roll feed table 253 held by these guide devices 145 to be movable back and forth, and this roll feed table 253 is driven forward and backward with respect to the reciprocating table 245. Advancement / retraction tool 2 such as hydraulic cylinder
54 and. The roll feed table 253 is provided with a plurality of (three in the drawing) roll depositing pieces 255 at predetermined intervals in the front-rear direction, and the reciprocating platform 245 has a pair of left and right sides on both sides of each roll depositing piece 255. The roll support 256 is provided.

Normally, the roll depositing piece 255 is stopped at a position lower than the roll bearing portion 256, and the roll bearing portion 256 is stopped.
It is in a state to support the new backup roll above. Therefore, the roll feed table 253 is the reciprocating table 24.
5 side rise, roll lifter 247 side advance,
A rectangular repetitive motion of descending at the advanced position and retreating to the original position side is performed, and the roll support portion 256 positioned far from the roll lifter 247 moves from the roll supporter 256 to the roll lifter 2.
The backup rolls are sequentially fed to the roll bearing 256 near the 47th position. [II-18]. The roll storage device 7B (see FIG. 1) dedicated to the recovery of the backup roll
It has a structure in which the supply-only roll accommodating device 7A is turned upside down, and the reciprocating table 245 and the roll feed table 253.
Is the reverse of the operation of the first intermediate roll roll storage device 6A, 6B and the second intermediate roll roll storage device 8A,
It is similar to the case of 8B. Therefore, the description here is omitted. [III]. In each of the roll changing devices 1, cylinders and motors mainly using hydraulic pressure as a driving source are mainly used in each embodiment, but they may be electrically driven. Of course, the various transmission means, the acting force conversion mechanism and the like can be replaced with various conventionally known mechanisms such as a gear device, a link mechanism, a rope transmission, a chain transmission, a ball screw mechanism and a cam mechanism.

The carts 9 and 10 may be bases fixed to the sides of the multi-stage rolling mill 2 (concrete bases, frame bodies made of shaped steel, etc.). Multi-stage rolling mill 2 has 2
The rolling mill is not limited to the 0-high rolling mill.

[0133]

Since the present invention has the above-mentioned structure,
The following effects are achieved. Since various rolls are held in such a manner that the center of gravity in the axial direction is sandwiched between them, the rolls can be stably held without being distorted or damaged. Therefore, it can be applied not only to the standard type multi-high rolling mill but also to the large multi-high rolling mill. Therefore, it is not necessary to use the porter bar system, which has a high risk and is inferior in work efficiency, and it becomes possible to perform roll recomposition safely, easily and quickly. In addition, according to each of the above-described embodiments, the time can be shortened by 1 to 3 minutes even when only the work rolls are rearranged.

The roll changing device has a simple structure that does not use a roll chuck device that tends to increase in size, an elevating cylinder having a long stroke, a turntable, and the like, so that various defects caused by these can be eliminated. . Since the multi-stage rolling mill is equipped with a mechanism and a device for holding each roll, it is possible to thoroughly prevent the roll from being distorted or scratched due to the roll change. In addition, automation can be achieved in combination with a roll changing device, and work efficiency is becoming easier to achieve. Not only work rolls,
Since it is possible to apply roll bending to the first and second intermediate rolls, it is possible to properly deal with defects in the rolling shape, and it is possible to perform rolling from the time when the leading edge of the rolled material is passed. And a high quality rolled steel material can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view showing a positional relationship between a roll changing device according to the present invention and a multi-high rolling mill which is improved to implement the roll changing device.

FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is a side view showing the main part of the multi-high rolling mill with the upper and lower roll covers open.

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is a front view showing a positioning device for an upper second intermediate roll (side view for a multi-high rolling mill).

FIG. 6 is a front cross-sectional view (corresponding view taken along the line C-C in FIG. 3) of a multi-stage rolling mill showing a positioning device for the upper second intermediate roll and a lifting device for the upper work roll.

FIG. 7 is a front cross-sectional view (corresponding view taken along the line CC of FIG. 3) of the multi-high rolling mill showing the operating state of the retracting mechanism provided in the positioning device for the upper second intermediate roll.

FIG. 8 is a front cross-sectional view (corresponding view taken along the line C-C in FIG. 3) of a multi-stage rolling mill showing a positioning device for the lower second intermediate roll and a knockout device for the lower work roll.

FIG. 9 is a side view of a multi-high rolling mill showing a fall prevention device for an upper first intermediate roll.

FIG. 10 is a side cross-sectional view (corresponding view taken along the line EE in FIG. 4) of the multi-stage rolling mill, showing a push-up device for the upper work roll and a push-down device for the lower work roll.

FIG. 11 is a front view (corresponding view taken along the line D-D in FIG. 4) of a multi-stage rolling mill showing another embodiment of the lifting device for the upper work roll and the knockout device for the lower work roll.

FIG. 12 is a side sectional view of a truck.

FIG. 13 is a side view showing a state in which a roll unloading device for work rolls according to the first embodiment is mounted on a trolley having compatibility.

FIG. 14 is a plan view of FIG.

15 (a) is a sectional view taken along line FF of FIG.
14B is a sectional view taken along line GG in FIG. 14, and FIG.
4 is a sectional view taken along line HH of FIG.

FIG. 16 is an enlarged side view showing the space adjusting mechanism.

17 is a partial crushing arrow view corresponding to the line JJ of FIG.

FIG. 18 is a partially crushed arrow view corresponding to line KK of FIG. 16.

FIG. 19 is a side view showing a state in which the second embodiment of the work roll dedicated roll attachment / detachment device is mounted on a compatible carriage.

20 is an enlarged view taken along the line LL in FIG.

21 is a side view showing the roll holder of FIG. 19 in an enlarged manner. FIG.

22 is an enlarged cross-sectional view taken along line MM in FIG.

23 is a plan view of relevant parts showing a roll delivery state between the roll attachment / detachment device shown in FIG. 13 and the roll delivery device shown in FIG. 22.

FIG. 24 is a front view showing a guide device provided in the roll delivery device.

FIG. 25 is a view taken along the line NN of FIG.

FIG. 26 is a side view showing a state in which the first embodiment of the roll attaching / detaching device for the first intermediate roll is mounted on the compatible carriage.

FIG. 27 is an enlarged front view of the partially crushed portion of FIG. 26.

28 is an enlarged sectional view taken along line OO of FIG.

FIG. 29 is a side sectional view of a rotating device.

FIG. 30 is a side view showing a state in which a second embodiment of the roll attaching / detaching device for the first intermediate roll is mounted on a compatible carriage.

31 is an enlarged cross-sectional view taken along the line PP of FIG.

FIG. 32 is a side view showing a state in which a roll attaching / detaching device for the second intermediate roll is mounted on a compatible carriage.

FIG. 33 is an enlarged sectional view taken along the line QQ of FIG. 1.

FIG. 34 is a partially crushed side view showing a state in which a dedicated roll unloading device for backup rolls is mounted on a dedicated trolley.

35 is a side sectional view showing an enlarged part R of FIG. 34. FIG.

36 is a side sectional view showing, on an enlarged scale, a portion S in FIG. 34. FIG.

FIG. 37 is an operation explanatory diagram corresponding to the TT line arrow of FIG. 34.

38 is an enlarged cross-sectional view taken along line U-U of FIG.

FIG. 39 is a side view showing the basic configuration of a multi-high rolling mill.

[Explanation of symbols]

1 roll changing device 2 Multi-stage rolling mill 3 trolley replacement device 4 guide rails 5A, 5B Roll storage device dedicated to the first intermediate roll Roll storage device for 6A and 6B work rolls Roll storage device exclusively for 7A and 7B backup rolls 8A, 8B Roll storage device dedicated to the second intermediate roll 9 Compatible cart 10 Cart for roll desorption device for backup roll 11 Roll desorption device for work rolls 12 Roll desorption device for backup roll only

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-2-112807 (JP, A) JP-A-51-83863 (JP, A) JP-A-2-52113 (JP, A) JP-A-5- 317932 (JP, A) JP-A-63-183710 (JP, A) Actually developed 56-131904 (JP, U) JP-B 48-24630 (JP, B1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B21B 31/10 B21B 13/14 B21B 31/08

Claims (17)

(57) [Claims] 1. The upper and lower work rolls (UWR and DW) are raised by raising an upper housing (UH) and an upper work roll (UWR) in a multi-stage rolling mill (2).
R) is formed into a gap, and the upper fork part (118) supporting the lower outer peripheral surface of the upper work roll (UWR) is advanced into the gap along the work roll axis from the working side of the multi-stage rolling mill. The upper work roll (UWR) is loaded on the upper fork part (118) by releasing the holding relationship of the upper work roll (UWR) with respect to the upper housing (UH), and then the upper fork part (11).
Multi-stage rolling characterized in that 8) is withdrawn from the inside of the multi-stage rolling mill to remove the upper work roll (UWR), or by inserting the upper work roll (UWR) by performing the reverse procedure. Machine roll changing method. 2. In a multi-stage rolling mill (2), the upper housing (UH) is raised and the upper work roll (UW) is moved.
R) is lifted or pulled out, and then the lower work roll (DWR) is floated by pushing up the pivot portions (45) on both end sides thereof to the gap formed below the lower work roll (DWR), The lower fork part (119) supporting the lower outer peripheral surface of the lower work roll (DWR) is advanced from the working side of the multi-stage rolling mill along the work roll axis to release the pushing up of the lower work roll (DWR). The lower work roll (DWR) is loaded on the lower fork part (119) by means of the above, and then the lower fork part (119) is withdrawn from the inside of the multi-stage rolling mill to extract the lower work roll (DWR), or these The lower work roll (DW
R) is inserted, and the roll reassembling method of the multi-high rolling mill is characterized. 3. A loading fork part (118, 119) for inserting a new work roll (UWR or DWR) on the side of a recovery fork part (118, 119) for extracting an old work roll (UWR or DWR). 119) is made to stand by, and after extraction of the old work roll (UWR or DWR) by the recovery fork part (118, 119) is completed, the operation center where the recovery fork part (118, 119) is positioned. While retracting the recovery fork portion (118, 119) from the position (CL),
The loading fork portion (118, 119) is set at the operation center position (CL), and then the new work roll (UWR or DWR) is inserted by the loading fork portion (118, 119). The roll reassembling method for a multi-high rolling mill according to claim 1 or 2, characterized in that. 4. A multi-high rolling mill (2), wherein an upper housing (UH) is raised, an upper work roll (UWR) is extracted from this upper housing (UH), and then an upper work roll ( A pair of clamping means (161 or 188) for clamping both end side pivot parts (40 or 23) of the upper intermediate roll (UMR (1) or (2)) is inserted toward the space where the UWR has come out, and these are inserted. After holding one or more upper intermediate rolls (UMR (1) or (2)) by the clamp means (161 or 188), both clamp means (161 or 188) are withdrawn from the multi-stage rolling mill. The upper intermediate roll (UMR (1) or
(2)) is withdrawn or the reverse procedure is performed to insert the upper intermediate roll (UMR (1) or (2)) into the roll changing method of the multi-high rolling mill. 5. The lower work roll (DWR) is pulled out from the lower housing (DH) by raising the upper housing (UH) of the multi-stage rolling mill (2) , and then the lower work from the working side of the multi-stage rolling mill. A pair of clamping means (161 or 188) for clamping both end side pivots (40 or 23) of the lower intermediate roll (DMR (1) or (2)) is inserted toward the space where the roll (DWR) is removed. After holding one or a plurality of lower intermediate rolls (DMR (1) or (2)) by these clamping means (161 or 188),
By lowering both clamping means (161 or 188) out of the multi-high rolling mill, the lower intermediate roll (DMR (1) or (2)) is withdrawn, or the reverse procedure thereof is performed. A method for changing rolls of a multi-high rolling mill, characterized by inserting DMR (1) or (2)). 6. The pass from the working side of the multi-stage rolling mill (2)
A guide laid in the direction orthogonal to the line (P)
Running along the rail (4) and this guide rail (4)
Possible dolly (9 etc.) and provided on this dolly (9 etc.)
Roll desorption device (11 etc.) and the guide rail
(4) at least one roll installed along the line
The roll attaching / detaching device (1
1 etc.) put the roll in the middle of the center of gravity in the axial direction.
B Lumpur holder holding both sides position useless (11
4,115) and this roll holder (114,115)
Etc.) along the roll axis set in the multi-stage rolling mill.
It has an advancing and retracting mechanism (113 etc.) to move in and out.
The roll storage device (6A, etc.) supports multiple rolls.
Part (149 etc.) and this roll storage device (6 A etc.)
When the car (9 etc.) is mounted horizontally
Between the table (11 etc.) and the roll support part (149 etc.)
A roll delivery device (140 etc.) for delivering rolls
The guide rail (4) is provided at a proper position in the longitudinal direction of the guide rail (4) at a position lower than the guide rail (4).
On the traverse stand (14), a traverse stand (14) that can move orthogonally to the first and second short rails (15) laid on the traverse stand (14) and connectable to the guide rails (4). wherein the first carriage replacement device including a second short rail connectable to the guide rail (4) parallel (16) to the side of the short rail (15) (3) is installed Roll changing device for multi-high rolling mill. 7. A predetermined height is provided on the working side of the multi-stage rolling mill (2).
The base part (carrying car 9 etc.) installed and installed and on this base part
And a work roll desorption device (11)
This roll desorption device (11) consists of
Clamp the pivot (45) on both ends of the roll (UWR)
Upper roll holder with clamping means (135)
Part (133) and lower work roll (DWR) both ends
Clamping means (135) for clamping the pivot (45)
A roll having a lower roll holder part (134)
Holder (131 or 132) and this roll holder
(131 or 132) is set in the multi-high rolling mill
An advancing / retreating mechanism that advances or retracts along the axis of the crawl
(113), and the roll attaching / detaching device (11) includes a roll holder (13).
1 or 132), the upper roll holder portion (133) and the multi-high rolling mill, wherein a rotation mechanism for the vertical position relationship of the lower roll holder portion (134) is rotated so replaced (129) is provided Roll changing device. 8. A predetermined height is provided on the working side of the multi-stage rolling mill (2).
The base part (carrying car 9 etc.) installed and installed and on this base part
And a work roll desorption device (11)
This roll desorption device (11) consists of
An upper fork that supports the lower peripheral surface of the roll (UWR )
Outside of lower part (118) and lower work roll (DWR)
Low having a lower fork portion (119) for supporting the peripheral surface
Holder (114 or 115) and this roll holder
(114 or 115) is set in the multi-high rolling mill
An advancing / retreating mechanism that advances or retracts along the axis of the crawl
(113) and the roll attaching / detaching device (11) includes upper and lower fork portions (1
18, 119) or the upper and lower roll holder parts (133,
The roll holder (114 or 133) having the same (134) has a roll holder (11) having the same structure as the roll holder (114 or 133) laterally.
5 or 134) is provided, and one of the roll holders (for example, 115 or 134) is used for recovery to hold the extracted old work roll, and the other roll holder (for example, 114 or 133) is It is designed for loading to hold a new work roll to be inserted, and a roll removing device (11) or a base (carriage 9 or the like) or both of them and a recovery roll holding body (for example, 115 or 134). wherein the loading roll holder (e.g. 114 or 133) and which selectively shifting mechanism for shifting relative to the operating center position (CL) (106) is provided
Roll changing device for multi-high rolling mill. 9. A predetermined height is provided on the working side of the multi-stage rolling mill (2).
The base part (carrying car 9 etc.) installed and installed and on this base part
Roll desorption device for intermediate rolls (85 or 8)
6) and consists of this roll desorption device (85 or 86)
Is a roll holder (160 or 188) and this roll
The holder (160 or 187) is set on the multi-stage rolling mill.
A forward / backward machine that advances or retracts along the axis of the intermediate roll.
Structure (113), and the roll holder (16)
0 or 187) is the intermediate roll set in the multi-high rolling mill.
Long charging arm (130A) along the
It is provided near both ends of the insertion arm (130A) and
For clamping the pivots (40 or 23) on both ends of the tool
And a roll holding device (160 or 187) in the roll attaching / detaching device (85 or 86).
By making it rotatable about (A), the clamping means (161 or 188) is positioned at the upper and lower positions of the intermediate rolls (UMR (1) and DMR (1), or the UMR (1)).
(2) and a feature that the DMR (2)) rotation mechanism which enables attitude change to be directed to (129) is provided
Roll changing device for multi-stage rolling mill. 10. In a multi-stage rolling mill (2), a push-up roller (83), which comes into contact with a slightly oblique lower portion of the outer peripheral surface of the upper work roll (UWR) when the upper housing (UH) is in the lowered position, and the push-up roller (83). An upper work roll lifting device (63) including a driving mechanism (81) for moving a lifting roller (83) forward and backward along a pass line (P) is provided. 11. In a multi-high rolling mill (2), a push-down roller (80) which comes into contact with a slightly oblique upper portion of the outer peripheral surface of a lower work roll (DWR), and the push-down roller (80) are provided on a pass line (P). A multi-high rolling mill comprising a lower work roll pressing device (62) including a drive mechanism (81) for advancing and retracting along the lower work roll. 12. In a multi-high rolling mill (2), both ends of a first upper intermediate roll (UMR (1)) arranged in contact with an upper outer peripheral surface of an upper work roll (UWR) are pivoted (40). A pair of bearing pieces (4
1) and an upper first intermediate roll composed of a support mechanism (41) and a drive mechanism (42) for engaging and disengaging the support pieces (41) with respect to both end side pivotal shafts (40) of the upper first intermediate roll (UMR (1)). A multi-stage rolling mill characterized by being provided with a drop-out prevention device (21). 13. In a multi-stage rolling mill (2), both end side pivot parts (40) of an upper first intermediate roll (UMR (1)) arranged in contact with an upper outer peripheral surface of an upper work roll (UWR). Upper part that applies upward pressure by hydraulic pressure to the first
A multi-high rolling mill comprising a reduction device (60) for intermediate rolls. 14. In a multi-stage rolling mill (2), a lower first intermediate roll (DMR (1)) arranged in contact with a lower outer peripheral surface of a lower work roll (DWR) is provided with a pivot shaft portion (40) at both ends thereof. Lower part that applies downward pressure by hydraulic pressure to the first
A multi-high rolling mill comprising a reduction device (61) for intermediate rolls. 15. In the multi-stage rolling mill (2), the first upper part
A pair of clamping means (2) for clamping both end side pivot parts (23) to the upper second intermediate roll (UMR (2)) arranged to abut on the upper outer peripheral surface of the intermediate roll (UMR (1)).
4) and an upper second intermediate roll (UMR (2)) clamped and held by the clamp means (24), and a hydraulic drive unit (30) for moving the upper second intermediate roll (UMR (2)) along the bending direction thereof. A multi-high rolling mill comprising a positioning device (20). 16. In the multi-stage rolling mill (2), the first lower part
A pair of clamping means (2) for clamping both end side pivot shaft parts (23) to the lower second intermediate roll (DMR (2)) arranged to abut on the lower outer peripheral surface of the intermediate roll (DMR (1)).
4) and a hydraulic drive unit (30) for moving the lower second intermediate roll (DMR (2)) clamped and held by these clamping means (24) along the bending direction thereof, for the lower second intermediate roll A multi-high rolling mill comprising a positioning device (38). 17. The retracting mechanism (31) for swinging the clamp means (24) arranged at least on the working side in an open leg shape toward the side of the multi-stage rolling mill is provided. The multi-high rolling mill according to claim 15 or 16 , characterized in that