JP7499675B2 - Follow-up pulley unit and wire saw machine using same - Google Patents

Description

The present invention relates to a follower pulley unit used in cutting concrete structures and other objects to be cut, and a wire saw machine using the same.

A method of cutting reinforced concrete structures and the like using a wire saw machine has been known for some time. As disclosed in Patent Document 1, this type of method involves wrapping the wire saw around the periphery (cutting position) of the object to be cut in an endless manner via a pair of guide pulleys and a drive pulley of a drive device, contacting it linearly, rotating the wire saw at high speed using the drive device, and moving the drive device (in the direction of pulling it away from the object to be cut) to maintain the appropriate tension required for cutting as the cutting progresses relative to the object to be cut (eliminating slack in the wire saw), and pulling and cutting the concrete, reinforcing bars, etc. of the object to be cut.

In this method, cutting dust is generated from the workpiece while it is being cut with the wire saw, so a dust collector is used to suck up the dust, and because the wire saw and the cut parts become very hot due to frictional heat, a water supply device is used to cool the wire saw and the cut parts with water.

However, in such construction methods using wire saw machines, the accuracy of the cutting line on the object to be cut is poor, which affects workability. Therefore, a new cutting device has been proposed in Patent Document 2 with the aim of improving such cutting accuracy.

The cutting device in Document 2 comprises a drive unit, a pair of moving units that are arranged to be movable along the steel girder, and a wire saw that is looped between the drive unit and the pair of moving units. The pair of moving units are arranged to face each other across the steel girder, and the wire saw is disposed between the moving units so as to intersect with the girder axis of the steel girder at the boundary between the steel girder and the deck, and is pulled by the drive unit together with the pair of moving units while rotating due to the power of the drive unit.

In this case, the pair of moving parts are slidably attached to a pair of rails provided on the sides of the steel girder. The pair of rails are arranged along the girder axis of the steel girder so as to face each other across the steel girder. The pair of moving parts are each movably engaged with the rails, so as to face each other across the steel girder. In this case, a motor (not shown) is built into the moving part body. The moving part body moves along the rails by rotating the wheels using the power of the motor. The motor is connected to a control means, and operates according to the operating status of the drive part.

In this way, the joint between the girder and the deck is cut using a wire saw, making construction easy. The wire saw is pulled together with a pair of moving parts that move along the side of the girder, so it cuts the joint while maintaining a constant angle. This prevents a large burden on the drive unit, and construction can be carried out with high precision.

JP 2009-101542 A JP 2017-203299 A

However, such conventional wire saw machines have the following problems.
(1) In the case of the wire saw machine of Patent Document 1, the dust collection work described above is often performed manually by an operator near the cutting point of the object to be cut while the object is being cut with the wire saw, which is undesirable because there is a risk that the operator may come into contact with the object to be cut. This point is not addressed in Patent Document 2.
(2) In the case of the wire saw machine of Patent Document 1, the water supply work described above requires an operator to stop cutting the workpiece with the wire saw and supply water to the workpiece while the workpiece is being cut, and then collect the wastewater, so it is difficult to say that the workability is good. This point is not addressed in Patent Document 2.
(3) In the case of the wire saw machine of Patent Document 2, a pair of pulleys (guide pulleys) are electrically driven on a pair of rails and follow the pulling of the wire saw by the drive unit. Therefore, during construction, the number of steps required to install the power source, control means, and their wiring, etc., increases, and workability is inevitably reduced accordingly.

The present invention aims to solve these problems in the past, and in this type of wire saw machine, the pulley is unitized on a rail and automatically follows the pulling of the wire saw by the drive unit, thereby improving the cutting accuracy of the object to be cut, the safety of the dust collection work, and the workability of water supply and drainage work in cutting work of concrete structures and other objects to be cut, thereby improving workability, and by eliminating the need for a drive system such as an electric drive to drive the pulley, the setup for installing equipment such as a power source, electric motor, and wiring is eliminated, thereby contributing to improved workability.

In order to achieve the above object, the present invention provides
A pulley unit is movably disposed on a rail installed near an object to be cut, and a wire saw extended from a drive unit of a wire saw machine body is wound around the pulley unit and moved together with the wire saw being pulled by the drive unit,
A pulley base movably disposed on the rail;
a pulley arm rotatably supported on the pulley base via a rotation shaft;
a pulley supported at one end of the pulley arm via a rotation shaft so as to be rotatable in parallel with the pulley arm;
a stopper provided at the other end of the pulley arm so as to be capable of contacting and separating from the rail by rotation of the pulley arm;
a spring member that urges the other end of the pulley arm toward the rail and presses the stopper against the rail in a normal state;
Equipped with
The wire saw is wound around the workpiece, and the wire saw is pulled by the drive unit while the workpiece is cut by the wire saw due to the drive of the drive unit.
When the tension of the wire saw acting on the pulley becomes greater than the rotational biasing force of the spring member acting on the pulley arm, the pulley arm rotates in a direction in which the stopper is released from the rail,
When the tension of the wire saw acting on the pulley becomes smaller than the rotational biasing force of the spring member acting on the pulley arm, the pulley arm is elastically restored by the spring member, and the stopper is pressed against the rail,
The pulley automatically follows the pulling of the wire saw by the drive unit.
The gist of the present invention is as follows.

In this case, it is preferable that the pulley base is formed in a generally cylindrical shape so as to be able to fit onto the outside of the rail, and has a plurality of guide rollers on its circumferential surface so as to be able to roll on the rail.
In this case, it is preferable that the pulley arm is formed in a generally V-shape and has an attachment portion for the pulley at one end and an attachment portion for the stopper at the other end.
In this case, the stopper is preferably formed by laminating a base plate and a rubber plate.
In this case, it is preferable that a tension coil spring is used as the spring member and is operatively connected to the mounting portion of the stopper of the pulley arm.
In this case, it is preferable that the spring member has a spring pressure adjusting portion for adjusting the spring pressure.
In this case, it is preferable that the pulley base has a mounting portion for the dust collection port of the dust collector.
In this case, it is preferable that the pulley base has a mounting portion for the water supply port and/or the water drain port of the water supply device.

In order to achieve the above object, the present invention provides
A wire saw machine comprising a drive unit of a wire saw machine body, a rail installed along an object to be cut, a pulley unit movably arranged on the rail, and a wire saw extending from the drive unit and wound around the pulley unit, the wire saw being wound around the object to be cut and the drive unit being driven to rotate and pull the wire saw, and the pulley unit being moved on the rail to cut the object to be cut,
The above-mentioned follow-up pulley unit is used as the pulley unit.
The gist of the present invention is as follows.

In order to achieve the above object, the present invention provides
A wire saw machine comprising: a drive section for a wire saw machine body; a pair of rails installed in parallel on both sides of an object to be cut; a pair of pulley units movably arranged on each of the rails; and a wire saw extending from the drive section and wound around each of the pulley units, the wire saw being wound around the object to be cut between the pulley units and the drive section being driven to rotate and pull the wire saw, and the pulley units being moved on each of the rails to cut the object to be cut,
The above-mentioned follow-up pulley unit is used for each of the pulley units.
The gist of the present invention is as follows.

According to the tracking pulley unit of the present invention and the wire saw machine using it, the pulley is made into a unit and automatically follows the pulling of the wire saw by the drive unit on the rail, so that in cutting work of concrete structures and other objects to be cut, the cutting accuracy of the object to be cut, the safety of the dust collection work, and the workability of water supply and drainage work can be improved, thereby improving workability. In addition, there is no need for a drive system such as an electric drive to drive the pulley, and the setup for installing equipment such as a power source, electric motor, and wiring can be eliminated, which contributes to improving workability, providing a unique and exceptional effect of the present invention.

FIG. 1 is a diagram showing a configuration of a follow-up pulley unit according to an embodiment of the present invention; FIG. 1 is a diagram showing the overall configuration of a wire saw machine using the follow-up pulley unit. FIG. 2 shows the configuration of the follow-up pulley unit in more detail. FIG. 13 shows an example of construction using a wire saw machine having the same follow-up pulley unit. FIG. 1 shows an example of construction using a wire saw machine having the follow-up pulley unit, and in particular shows the operation of the follow-up pulley unit.

Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a follow-up pulley unit, and FIG. 2 shows a wire saw machine using this pulley unit.

As shown in FIG. 1, the follower pulley unit U is movably arranged on a rail R installed near the workpiece to be cut, and is wound around the wire saw W (see FIG. 2) that extends from the drive unit M11 (see FIG. 2) of the wire saw machine main body M1 (see FIG. 2; hereafter simply referred to as the main body M1), and is moved together with the wire saw W being pulled by the drive unit M11.

The pulley unit U is particularly configured with a pulley base 1, a pulley arm 2, a pulley 3, a stopper 4, and a spring member 5.

The pulley base 1 is movably arranged on the rail R. The pulley base 1 is formed in a generally cylindrical shape so that it can be fitted onto the rail R, and has a number of guide rollers 11 on its circumferential surface so that they can roll on the rail R. In this case, the rail R is formed from a steel material in a square shape (approximately rectangular in cross section), and the pulley base 1 is formed from a steel material in a generally rectangular cylindrical shape (a cylindrical shape with a generally rectangular cross section) so that it can slide on the rail R. At both ends of each face of the pulley base 1, a bearing 12 is protruding from the center in the width direction, and openings 10 are formed in pairs on both sides, and a pair of guide rollers 11 are attached to each opening 10 on each face via an axis to the central bearing 12. Each guide roller 11 can abut against each face of the rail R through each opening 10.

In this case, the two opposing surfaces of the pulley base 1 are the mounting surfaces 101 of the pulley arm (hereinafter referred to as the pulley arm mounting surfaces 101 or mounting surfaces 101), which will be described later. Adjacent to these mounting surfaces 101 and on one surface 102 corresponding to the other end 22 of the pulley arm 2, an opening 103 is formed closer to the other end than the center in the longitudinal direction so that the stopper 4 (described later) can be fitted into the opening 103.

Furthermore, although not specifically shown, the pulley base 1 has, at appropriate positions, mounting parts for the dust collection inlet of the dust collector, and mounting parts for the water supply inlet and/or drain outlet of the water supply device. In this case, the dust collector and its dust collection inlet, the water supply device and its water supply inlet, and the drain outlet are generally known, and the mounting parts are accordingly.

The pulley arm 2 is pivotally supported on the pulley base 1 via a pivot shaft 211. The pulley arm 2 is formed in a generally V-shape, with one end 21 having a mounting portion 202 for the pulley 3, and the other end 22 being a mounting portion 203 for the stopper 4. In this case, the pulley arm 2 is made of a pair of arms 201, each of which is formed from steel material in a V-shape in plan view, and is made up of a pair of long lever parts 201a on one end side having a shaft insertion hole (hereinafter referred to as the shaft insertion hole 202) for the rotating shaft 31 that supports the pulley 3 as the mounting portion 202 for the pulley 3 at one end 21, and a short U-shaped mounting portion 203 for the stopper 4 at the other end 22. The pulley arm 2 is pivotally supported and attached to the two opposing surfaces of the pulley base 1, i.e., the pulley arm mounting surfaces 101, closer to one end than the center in the length direction, via the pivot shaft 211.

The pulley 3 is supported at one end 21 of the pulley arm 2 via a rotating shaft 31 so as to be rotatable parallel to the pulley arm 2. In this case, the pulley 3 is made of a disk-shaped member, with flanges formed on both edges of the periphery, and a recess in the center into which the wire saw W can be inserted. The pulley 3 is attached to one end of the rotating shaft 31, which is passed through the shaft insertion hole 202 at one end 21 of each arm 201 of the pulley arm 2, and is disposed at one end 21 of the pulley arm 2 so as to be rotatable parallel to the pulley arm 2.

The stopper 4 is provided at the other end 22 of the pulley arm 2 so that it can abut against and separate from the rail R by the rotation of the pulley arm 2. In this case, the stopper 4 is formed by laminating a base plate 41 made of steel and a rubber plate 42 made of vibration-proof rubber, and is attached to the mounting portion 203 of the stopper 4 at the other end 22 of the pulley arm via a mounting frame 43, and is arranged so as to face and fit into the opening 103 of the pulley base 1. As shown in FIG. 3, the mounting frame 43 is formed into a rectangular frame shape from steel. This mounting frame 43 is assembled and arranged so that it can straddle each pulley arm mounting surface 101 of the pulley base 1 in a direction perpendicular to the pulley arm mounting surface 101 at a position corresponding to the opening 103 and can be displaced in the perpendicular direction, and is attached to the mounting portion 203 of the pulley arm 2 on the other end 22 side of the pulley arm 2. The stopper 4 is fixed to the other end of the mounting frame 43 on the other end 22 side of the pulley arm 2, and the surface of the rubber plate 42 of the stopper 4 is arranged to face the opening 103 of the pulley base 1. Thus, when the other end 22 of the pulley arm 2 is rotated in a direction approaching the pulley base 1, the other end of the mounting frame 43 is displaced toward the pulley base 1 and the stopper 4 is fitted into the opening 103 of the pulley base 1, and when the other end 22 of the pulley arm 2 is rotated in a direction away from the pulley base 1, the other end of the mounting frame 43 is displaced in a direction away from the pulley base 1 and the stopper 4 is released from the opening 103 of the pulley base 1.

The spring member 5 urges the other end 22 of the pulley arm 2 to rotate toward the rail R, and presses the stopper 4 against the rail R in the normal state. In this case, a coil spring (hereinafter referred to as the coil spring 5) is used as the spring member 5, and is operatively connected to the mounting portion 203 of the stopper 4 of the pulley arm 2. In this case, the coil spring 5 is interposed between the receiving portion 431 on the pulley base 1 side and the receiving portion 432 on one end side of the mounting frame 43 on the opposite side to the stopper 4, sandwiching the pulley base 1 therebetween. Thus, due to the biasing force of the coil spring 5, the entire mounting frame 43 is displaced in a direction such that the other end approaches the pulley base 1 as a normal state, and the stopper 4 is pressed into the opening 103 of the pulley base 1; when the other end 22 of the pulley arm 2 is rotated in a direction away from the pulley base 1 against the biasing force of the coil spring 5, the entire mounting frame 43 is displaced in a direction such that the other end moves away from the pulley base 1, and the stopper 4 is released from the opening 103 of the pulley base 1.

In this way, the pulley arm 2, the mounting frame 43, the stopper 4, and the coil spring 5 form a brake mechanism for the pulley unit U. In this brake mechanism, the biasing force of the coil spring 5 is usually stronger than the tension of the wire saw W against the pulley 3, and the pulley unit U is fixed on the rail R. As the wire saw W cuts the object to be cut, the cut portion of the object approaches the pulley unit U, and the tension of the wire saw W against the pulley 3 increases beyond the biasing force of the coil spring 5. (The brake is released.) The pulley unit U is pulled by the wire saw W and slides on the rail R following the wire saw W. Then, when the pulley unit U slides on the rail R following the wire saw W, the biasing force of the coil spring 5 becomes stronger than the tension of the wire saw W against the pulley 3, and (the brake is applied) the pulley unit U is fixed on the rail R. By repeating this operation, the pulley unit U automatically and intermittently follows the wire saw W in accordance with the cutting of the object to be cut by the wire saw W.

This pulley unit U has such a configuration, and while the wire saw W is hung around the workpiece and the wire saw W cuts the workpiece by driving the drive unit M11, the wire saw W is pulled by the drive unit M11, and when the tension of the wire saw W acting on the pulley 3 becomes greater than the rotational biasing force of the coil spring 5 acting on the pulley arm 2, the pulley arm 2 rotates in a direction in which the stopper 4 moves away from the rail R, and when the tension of the wire saw W acting on the pulley 3 becomes smaller than the rotational biasing force of the coil spring 5 acting on the pulley arm 2, the pulley arm 2 elastically returns by the coil spring 5, and the stopper 4 is pressed against the rail R.

That is, while the wire saw W is hung around the workpiece and the wire saw W is cut by the drive unit M11, the wire saw W is pulled by the drive unit M11, and when the tension of the wire saw W acting on the pulley 3 becomes greater than the rotational biasing force of the coil spring 5 acting on the pulley arm 2, the pulley arm 2 rotates in a direction in which the stopper 4 is released from the rail R. During this rotation of the pulley arm 2, the pulley unit U is pulled by the wire saw W, and the pulley base 1 is moved on the rail R in the direction of the drive unit M11. Due to this movement of the pulley base 1, the tension of the wire saw W acting on the pulley 3 becomes smaller than the rotational biasing force of the coil spring 5 acting on the pulley arm 2, and the pulley arm 2 is elastically returned by the coil spring 5. As a result, the stopper 4 is pressed against the rail R, and the pulley base 1 stops moving on the rail R and is fixed. The pulley unit U repeatedly moves and stops on the rail R in this way, and the pulley 3 automatically and intermittently follows the pulling of the wire saw W by the drive unit M11.

As shown in FIG. 2, the wire saw machine M is configured with a drive unit M11 of the main body M1, a rail R installed along the workpiece to be cut, a pulley unit U movably arranged on the rail R, and a wire saw W extending from the drive unit M11 and wound around the pulley unit U.

The drive unit M11 rotates and pulls the wire saw W, and has a drive unit main body 60, a pair of first drive unit pulleys 61, and a pair of second drive unit pulleys 62.

The drive unit main body 60 applies a rotational force to the wire saw W and pulls the wire saw W. The drive unit main body 60 also has a drive source such as a motor, not shown, as well as multiple guide pulleys 601. The wire saw W is looped around these guide pulleys 601, and the length of the wire saw W extending from the drive unit M11 is adjusted by appropriately moving each guide pulley 601.

The first and second drive pulleys 61, 62 are each made of a disk-shaped member with flanges formed on both edges of the periphery and a recess in the center into which the wire saw can be inserted.

Each of the first drive pulleys 61 is rotatably held by an attachment member (not shown) extending from the drive body 60. In this case, each of the first drive pulleys 61 guides the wire saw W extending from the drive body 60 vertically.

The second drive pulleys 62 are each rotatably held by an attachment member 621 attached to the rail R. In this case, each second drive pulley 62 is attached to the rail R below each first drive pulley 61, and guides the wire saw W laterally relative to each first drive pulley 61. The attachment member 621 of this pulley 62 may be slidably attached to the rail R.

The wire saw W is made of a so-called diamond wire, is flexible, and has no ends. It is wound between the drive unit M11 and the pulley 3 of the pulley unit U.

The rail R and pulley unit U use the rail R and pulley unit U that have already been described.

In this way, the wire saw W is wrapped around the workpiece and the drive unit M11 is driven to rotate and pull the wire saw W, and the following pulley unit U moves on the rail R to cut the workpiece.

Figures 4 and 5 show an example of construction using a wire saw machine M with this follow-up pulley unit U. In this case, the object to be cut is a concrete structure.

As shown in FIG. 4 (1), first, the wire saw machine M is installed. In this case, the main body M1 is placed on the upper surface of the concrete structure and fixed with an anchor driven from the upper surface of the concrete structure. Next, the rail R is installed parallel to the upper surface of the concrete structure, and the second drive pulleys 62 are attached to the lower part of each first drive pulley 61 of the drive unit M11 at the other end side of the rail R. Next, a follow-up pulley unit U is attached to one end side of the rail R. In this case, the pulley unit U is fitted onto the rail R by passing the rail R through the pulley base 1 with the pulley 3 facing the same direction as the second drive pulley 62, and placed at one end of the rail R. This state is fixed (locked) by pressing the stopper 4 against the rail R surface through the opening 103 of the pulley base 1 (see FIG. 1). Then, the wire saw W extending from the drive unit M11 is wound around each of the first and second drive unit pulleys 61, 62 and the pulley 3 of the follower pulley unit U, and is hung around the concrete structure, with both ends connected to make it endless.

As mentioned above, the pulley base 1 has a mounting portion for the dust collection port of the dust collector, and a mounting portion for the water supply port and/or drain port of the water supply device, and the dust collection port of the dust collector, the water supply port and/or drain port of the water supply device are attached to each mounting portion, and each is directed toward the part of the concrete structure to be ground by the wire saw W.

In this manner, the drive unit M11 is driven to rotate the wire saw W, thereby cutting the concrete structure. In this case, the power of the drive unit M11 is used to apply a constant tension to the endless wire saw W, causing the wire saw W to rotate and be pulled (i.e., to be pulled), thereby cutting the concrete structure.

As shown in Fig. 4 (1), while the concrete structure is being cut with the wire saw W, the wire saw W is pulled by the drive unit M11, and the grinding portion of the wire saw W for the concrete structure gradually approaches the pulley unit U. Next, as shown in Figs. 5 (1) and (2), when the grinding portion of the wire saw W for the concrete structure approaches the pulley unit U and the tension of the wire saw W acting on the pulley 3 becomes greater than the rotational biasing force of the coil spring 5 acting on the pulley arm 2, the pulley arm 2 is gradually rotated in a direction in which the stopper 4 is released from the rail R, and the pressure contact state of the stopper 4 against the rail R is released, as shown in Fig. 5 (3). When the pressure contact state of the stopper 4 against the rail R is released, during this release, the pulley unit U is pulled by the wire saw W, and the pulley base 1 slides on the rail R in the direction of the drive unit M11. Due to this sliding of the pulley base 1, as shown in Figures 4 (2) and 5 (4), the tension of the wire saw W acting on the pulley 3 becomes smaller than the rotational biasing force of the coil spring 5 acting on the pulley arm 2. As a result, the pulley arm 2 is elastically returned by the coil spring 5, the stopper 4 is pressed against the rail R, and the pulley base 1 stops moving on the rail R and is fixed (locked).

While the concrete structure is being cut with the wire saw W, the pulley unit U repeatedly moves and stops on the rail R, and the pulley 3 automatically and intermittently follows the pulling of the wire saw W by the drive unit M11. While the concrete structure is being cut in this way, the pulley 3 automatically follows the pulling of the wire saw W by the drive unit M11, so that the wire saw W cuts the concrete structure at a constant speed, with a constant load, and with a stable cutting line in a constant direction. In addition, because the wire saw W cuts the concrete structure at a constant speed, with a constant load, and with a stable cutting line in a constant direction, the scattering direction of the cutting powder and the supply and/or drainage direction of the cooling water are determined, so that the collection of the cutting powder and the supply and/or drainage of the cooling water can be effectively carried out using the dust suction port, water supply port, and/or drainage port attached to the pulley unit U without the need for manpower.

As described above, with the follow-up pulley unit U and the wire saw machine M using it, the pulley 3 is made into a unit that automatically follows the pulling of the wire saw W by the drive unit M11 on the rail R, so that in cutting work on concrete structures and other objects, the cutting accuracy of the object to be cut, the safety of the dust collection work, and the workability of water supply and drainage work can be improved, improving the workability of the cutting work as a whole. In addition, by eliminating the need for a drive system such as an electric motor for driving the pulley as in the past, the setup of equipment such as a power source, electric motor, and wiring can be reduced, contributing to improved workability.

That is, while the wire saw W is cutting the workpiece, the wire saw W is pulled by the drive unit M11, and the pulley unit U automatically follows the pulling of the wire saw W by the drive unit M11, so that the wire saw W can cut the concrete structure at a constant speed, with a constant load, and with a stable cutting line in a constant direction. Therefore, by automatically following the pulley 3 to the pulling of the wire saw W by the drive unit M11, the accuracy of the cutting line in cutting the workpiece can be improved. In addition, by automatically following the pulley 3 to the wire saw W, the direction of the supply and/or drainage of cutting powder and cooling water is determined, cutting powder can be sucked and collected by the dust suction port attached to the pulley base 1, and cooling water can be supplied and drained by the water supply port and/or drain port attached to the pulley base 1, so that the recovery rate of cutting powder and cooling water can be improved. This also eliminates the need for manpower, eliminating the need for cumbersome tasks, such as having workers suction cutting powder near the object being cut, or timing the cutting of the object to water it according to the cutting progress, and interrupting the cutting of the object to perform water supply work, as was previously required, and ensuring the safety of the workers. By eliminating these cumbersome tasks, the workability of the cutting work can be improved. In addition, because the cutting of the object with the wire saw W is performed under a constant load on the wire saw W, wear on the wire saw W can also be reduced.

Furthermore, while the wire saw W is cutting the workpiece, the wire saw W is pulled by the drive unit M11, and the pulley unit U automatically follows the pulling of the wire saw W by the drive unit M11. This reduces the need for a power supply, electric motor, control panel and wiring for driving the pulley unit U as in the past, and eliminates the need to install these pieces of equipment. This elimination of the installation work further improves the ease of cutting work.

Furthermore, the automatic tracking system of this pulley unit U can reduce wear on the wire saw W even when cutting thin structures, making it suitable for on-site work where it is not possible to stop midway, such as when cutting iron, and improving workability.

In this embodiment, the spring member may be provided with a spring pressure adjustment unit for adjusting the spring pressure. In this case, the spring pressure adjustment unit is configured by a commonly known spring pressure adjustment type, such as a bolt tightening type in which the coil spring 5 is compressed by tightening the coil spring 5 with a bolt to increase the spring pressure (stronger), and the bolt is loosened to loosen the compression of the coil spring 5 to decrease the spring pressure (weaker). In this way, the spring pressure adjustment unit adjusts the spring pressure of the coil spring 5 according to the drive type (electric or hydraulic) of the drive unit M11 and the magnitude of the drive force (output), thereby appropriately adjusting the brake size of the brake mechanism. That is, in the structure in which the pulley 3 automatically follows the pulling of the wire saw W by the drive unit M11, as described above, the tension of the wire saw W acting on the pulley 3 and the effective angle of the wire saw W acting on the pulley 3 change depending on the drive type and the magnitude of the drive force of the drive unit M11, so it is desirable to adjust the brake of the brake mechanism to a size suitable for the drive type and the magnitude of the drive force of the drive unit M11. Therefore, by adjusting the spring pressure of the coil spring 5 in the spring pressure adjustment unit according to the drive type and magnitude of the drive force of the drive unit M11 and adjusting the braking force of the brake mechanism, the pulley unit U can be made to effectively follow the pulling of the wire saw W by the drive unit M11 on the rail R according to the drive type and magnitude of the drive force of the drive unit M11.

In addition, in this embodiment, the wire saw machine M includes a drive unit M11 of the main body M1, a rail R installed along the workpiece, a follow-up pulley unit U movably arranged on the rail R, and a wire saw W extending from the drive unit M11 and wound around the pulley unit U, and by wrapping the wire saw W around the workpiece and driving the drive unit M11, the wire saw W is pulled while rotating and the pulley unit U is moved on the rail R to cut the workpiece; however, the wire saw machine may also include a drive unit of the main body, a pair of rails installed in parallel on both sides of the workpiece, a pair of follow-up pulley units movably arranged on each rail, and a wire saw extending from the drive unit and wound around each pulley unit, and by wrapping the wire saw between each pulley unit around the workpiece and driving the drive unit, the wire saw is pulled while rotating and each pulley unit is moved on each rail to cut the workpiece.
By using such a pair of rails and pulley units, it is possible to achieve the same or greater effects as those of the above embodiment.

U: Tracking pulley unit R: Rail M: Wiresaw machine M1: Wiresaw machine body (main body)
M11 Drive unit W Wire saw 1 Pulley base 101 Pulley arm mounting surface (pulley arm mounting surface or mounting surface)
102 Surface 103 Opening 10 Opening 11 Guide roller 12 Bearing 2 Pulley arm 21 One end 211 Rotating shaft 22 Other end 201 Arm 201a Lever portion 202 Mounting portion (shaft insertion hole)
203 Mounting portion 3 Pulley 31 Rotating shaft 4 Stopper 41 Base plate 42 Rubber plate 43 Mounting frame 431 Receiving portion 432 Receiving portion 5 Spring member (coil spring)
60 Drive unit body 601 Guide pulley 61 First drive unit pulley 62 Second drive unit pulley 621 Mounting member

Claims (10)

A pulley unit is movably disposed on a rail installed near an object to be cut, and a wire saw extended from a drive unit of a wire saw machine body is wound around the pulley unit and moved together with the wire saw being pulled by the drive unit,
A pulley base movably disposed on the rail;
a pulley arm rotatably supported on the pulley base via a rotation shaft;
a pulley supported at one end of the pulley arm via a rotation shaft so as to be rotatable in parallel with the pulley arm;
a stopper provided at the other end of the pulley arm so as to be capable of contacting and separating from the rail by rotation of the pulley arm;
a spring member that urges the other end of the pulley arm toward the rail and presses the stopper against the rail in a normal state;
Equipped with
The wire saw is wound around the workpiece, and the wire saw is pulled by the drive unit while the workpiece is cut by the wire saw due to the drive of the drive unit.
When the tension of the wire saw acting on the pulley becomes greater than the rotational biasing force of the spring member acting on the pulley arm, the pulley arm rotates in a direction in which the stopper is released from the rail,
When the tension of the wire saw acting on the pulley becomes smaller than the rotational biasing force of the spring member acting on the pulley arm, the pulley arm is elastically restored by the spring member, and the stopper is pressed against the rail,
The pulley automatically follows the pulling of the wire saw by the drive unit.
A follow-up pulley unit characterized by the above. The follow-up pulley unit according to claim 1, wherein the pulley base is formed in a generally cylindrical shape so that it can be fitted onto the rail, and has a number of guide rollers on its circumferential surface so that they can roll on the rail. The follow-up pulley unit according to claim 1 or 2, wherein the pulley arm is formed in a generally V-shape, has a pulley mounting portion at one end, and has a stopper mounting portion at the other end. A follow-up pulley unit according to any one of claims 1 to 3, in which the stopper is made by laminating a base plate and a rubber plate. A follow-up pulley unit according to any one of claims 1 to 4, in which a coil spring is used as the spring member and is operatively connected to the mounting portion of the stopper of the pulley arm. A follow-up pulley unit according to any one of claims 1 to 5, which has a spring pressure adjustment part for adjusting the spring pressure of the spring member. A follow-up pulley unit according to any one of claims 1 to 6, having a mounting portion for a dust collection port of a dust collector on the pulley base. A follow-up pulley unit according to any one of claims 1 to 7, having a pulley base with a mounting portion for a water supply port and/or a water drain port of a water supply device. A wire saw machine comprising a drive unit of a wire saw machine body, a rail installed along an object to be cut, a pulley unit movably arranged on the rail, and a wire saw extending from the drive unit and wound around the pulley unit, the wire saw being wound around the object to be cut and the drive unit being driven to rotate and pull the wire saw, and the pulley unit being moved on the rail to cut the object to be cut,
The pulley unit is a follow-up pulley unit according to any one of claims 1 to 8.
A wire saw machine characterized by: A wire saw machine comprising: a drive section for a wire saw machine body; a pair of rails installed in parallel on both sides of an object to be cut; a pair of pulley units movably arranged on each of the rails; and a wire saw extending from the drive section and wound around each of the pulley units, the wire saw being wound around the object to be cut between the pulley units and the drive section being driven to rotate and pull the wire saw, and the pulley units being moved on each of the rails to cut the object to be cut,
A follow-up pulley unit according to any one of claims 1 to 8 is used for each of the pulley units.
A wire saw machine characterized by:

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