JPH06190777A - Paper roll cutting device - Google Patents

Abstract

PURPOSE:To manufacture a paper saw element equipped at the cutter tip with saw-teeth without roundness, with good producibility, by segregating a paper roll so as to have a zigzag edge. CONSTITUTION:A feed drum 16 to transport a paper roll 1 at the same speed as the speed of a cutter element in one region in circumferential direction is furnished in a position upstream of a rotary die cutter 2 having a receptacle cylinder 6 furnished with a receptacle table 8 and a cutter cylinder 5 equipped with cutter 7, which is fed in depth direction to perform cutting into the web 1 under running. A reversing device 25 is installed upstream of this feed drum 16, and after cutting of the paper 1, its leading edge is returned to the specified position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for cutting the leading end of a long raw material such as paper or plastic sheet one after another, and more particularly, for making a saw blade member by cutting the leading end of the raw material. The present invention relates to a suitable material cutting device.

[0002]

2. Description of the Related Art Conventionally, a metal cutting blade having a saw blade is attached to a rectangular parallelepiped carton containing a wound aluminum foil or a resin film wrap,
A structure in which a wrap of an aluminum foil or a resin film is pulled out from a carton and separated by using a cutting blade is widely used. To manufacture the cutting blade used in this carton, a method of punching the cutting blade from a metal plate with a die set was used (for example,
JP-A-1-294029 and JP-A-2-29321
(See Japanese Patent Publication).

[0003]

However, the carton using such a conventional metal cutting blade cannot be incinerated because the cutting blade is made of metal during incineration, which causes an environmental problem. Therefore, it is desired to change the cutting blade from a conventional metal blade to a flammable blade such as paper or plastic.

In order to make a cutting blade made of paper or plastic, a long raw material such as paper or plastic sheet is prepared, and the raw material is introduced from the tip to the mold die as disclosed in the above publication. It is thought that it is better to separate the saw blades one after another according to the set. However, it has been found that when a non-metal raw material such as paper or plastic is cut into a saw blade shape with a die set, the resulting saw blade has poor sharpness. The cause is considered as follows. That is, since the die set is cut using shearing, it is necessary to form a slight clearance between the blades of the upper and lower die sets, which causes the tip of the saw blade to be rounded. . With metal blades, the hardness of the blade itself is high, so even if roundness occurs at the tip of the saw blade, it does not affect sharpness, but with paper, plastic, etc., the hardness is low, so the roundness of the cutting edge greatly affects sharpness, It wasn't sharp.

Further, in the conventional die set, the raw material to be cut is temporarily stopped, and in that state, the upper die set is lowered to perform cutting, and then the upper die set is raised to its original position. Then, since the intermittent operation of positioning the raw material by advancing the original material by a predetermined amount is performed, there is a problem that the production efficiency is poor.

The present invention has been made to solve the above-mentioned conventional problems, and it is possible to separate a raw material such as paper or plastic from the tip end one after another with high productivity, and at that time, a saw blade is formed. In this case, it is an object of the present invention to provide a raw fabric cutting device capable of forming a saw blade with good sharpness without causing roundness at the tip of the saw blade.

[0007]

The invention according to claim 1 of the present application comprises a cutter cylinder having a cutter blade extending in the longitudinal direction on the outer peripheral surface, and a receiving cylinder having a pedestal for receiving the cutter blade on the outer peripheral surface. A rotary die cutter provided, and a raw fabric conveying and reversing device that feeds the raw fabric between the cutter cylinder and the receiving cylinder of the rotary die cutter at a speed synchronized with the speed of the cutter blade, and pulls back the raw fabric after completion of cutting. The main point is the original fabric cutting device.

The invention described in claim 2 is the same as claim 1.
According to the invention described in (1), the original fabric transport reversing device is provided with a pair of feed cylinders having a cylindrical feed surface in a part of the outer circumference in the circumferential direction, and the feed surface of the pair of feed cylinders forms the raw material Between the cutter cylinder and the receiving cylinder of the rotary die cutter, there is provided a conveying device that feeds in synchronization with the speed of the cutter blade, and a reversing device that pulls back the raw fabric after the cutting of the raw fabric by the rotary die cutter. To do.

Further, in the invention described in claim 3, in the material cutting device according to claim 1 or 2, the cutter cylinder and the receiving cylinder of the rotary die cutter have their cutter blade tips at the time of material cutting. Is arranged so as to leave a minute clearance between the base and the pedestal, the receiving cylinder is provided with a suction means for holding the separated raw material by suction, and the raw material supplied to the rotary die cutter is further provided. A stopper device for temporarily stopping the raw fabric after the completion of the cutting of the raw fabric by the rotary die cutter is provided in the reverse conveying passage.

[0010]

In the raw fabric cutting device according to the above-mentioned claim 1,
The rotary die cutter is constantly rotating at a constant speed, and the original fabric conveying / reversing device conveys the original fabric, and its tip is between the cutter cylinder and the receiving cylinder of the rotary die cutter, in synchronization with the speed of the cutter blade. Send in.
In a rotary die cutter, a cutter blade cuts a raw material supported by a pedestal and cuts the raw material into a shape that matches the shape of the cutter blade. At this time, only the cutter blade cuts into the original fabric and presses the original fabric, so the original fabric can be accurately cut into the shape of the cutter blade, for example, the blade edge of the cutter blade, the saw blade on the original fabric to be cut. By forming the saw blade so as to be formed, it is possible to form a saw blade having no rounded tip. At this time, it is not necessary to surely separate the original fabric by the cutter blade, but it is also possible to bring the parts into a connected state and separate them later by an appropriate means.

After the cutting by the cutter blade is completed, the original fabric conveyance reversing device reverses to pull back the original fabric, and the tip (the portion cut by the cutter blade) is positioned at a predetermined position with respect to the rotary die cutter, and the next operation is performed. Prepare for In this way, the raw fabric can be cut into desired shapes one after another at desired positions from its tip, and by using a cutter blade having a serrated edge, a saw blade member having a rounded tip is provided. Can be made. Moreover, the productivity can be improved by using the rotary die cutter.

Here, as the original fabric conveyance reversing device, a conveyance device provided with a pair of feed cylinders having a cylindrical feed surface in a part of the outer circumference in the circumferential direction, and a reversing device provided separately from the conveyance device. With the one provided with, the feed surfaces of the pair of feed cylinders are inserted between them by simply rotating the feed cylinder of the carrier at a constant speed in synchronization with each cylinder of the rotary die cutter. When the original fabric is nipped, the original fabric can be conveyed and its tip can be fed between the cutter cylinder and the receiving cylinder of the rotary die cutter at a speed synchronized with the speed of the cutter blade.
For this reason, a complicated control device for synchronizing the feed speed of the original fabric with the speed of the cutter blade of the rotary die cutter becomes unnecessary. Further, at this time, if the front end position of the raw fabric before being nipped by the pair of feed drums is positioned at a predetermined position, the feed amount by the feed drum is constant, so that the constant position from the front end of the raw fabric is maintained. It can be sent to the cutter blade of the rotary die cutter, and the cutting position of the material can be controlled easily. After cutting the original fabric with the rotary die cutter, the original fabric may be pulled back by the reversing device when the portions other than the feed surfaces of the pair of feed cylinders are in positions facing the original fabric. At this time, since the original fabric is not nipped by the feed cylinder, it can be pulled back without any trouble.

As described above, in the rotary die cutter, the cutter blade is pressed against the pedestal to push out the original fabric.
At that time, if the tip of the cutter blade pushes through the raw material and then comes into contact with the pedestal, the blade edge may be worn and the life may be shortened. Therefore, in the invention of claim 3, the tip of the cutter blade has a minute clearance (for example, 0.0
(About 1 mm) is left. Therefore, the cutter blade does not hit the pedestal, and the blade tip can be prevented from being worn or damaged and the life can be extended. However, in this case, even when the cutter blade cuts into the raw fabric, the raw fabric cannot be completely cut, and a single thin skin is connected.
However, after cutting the raw fabric with the cutter blade, with the side that the tip of the raw fabric is cut off being held by suction in the cylinder,
By stopping the original fabric with a stopper device, tensile force is applied to the part left uncut by the cutter blade,
This part can be torn and separated reliably.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention shown in the drawings will be described below. FIG. 1 is a schematic side view showing an embodiment in which the raw fabric cutting device of the present invention is applied to the manufacture and attachment of a paper saw blade member, that is, a paper saw blade. In FIG. 1, reference numeral 1 is a paper raw material for making a paper saw blade, which is pulled out from a winding (not shown). 2 is a saw blade 3a on both sides as shown in FIG. 2 by cutting off the tip of the original fabric 1 in a zigzag shape.
It is a rotary die cutter for making the paper saw blade 3 having the shape. The paper saw blade 3 produced in this embodiment has an extremely small width (a distance between the front and rear saw blades 3a, 3a) of about 5 to 10 mm.

In FIG. 1, the rotary die cutter 2
Has a cutter cylinder 5 and a receiving cylinder 6 arranged in parallel with each other, and a drive device (not shown) for synchronously rotating these cylinders 5, 6 in opposite directions. The cutter cylinder 5 has a cutter blade 7 extending in the longitudinal direction at a position separated by 180 ° on the outer peripheral surface thereof.
The receiving cylinder 6 has a pedestal 8 for receiving the cutter blade 7 at a position separated by 180 ° on the outer peripheral surface. The tips of these cutter blades 7 and the outer peripheral surface of the pedestal 8 are arranged on the circumference of the same diameter. Therefore, when the cylinders 5 and 6 rotate synchronously, the tips of the cutter blade 7 and the outer periphery of the pedestal 8 are arranged. It moves at the same speed as the surface, and the original fabric 1 can be satisfactorily cut by each cutter blade 7 and the pedestal 8 corresponding thereto.

Here, the center distance between the cutter cylinder 5 and the receiving cylinder 6 is, as shown in an enlarged view in FIG. 3, when the cutter blade 7 faces the pedestal 8 at a right angle (at the time of cutting the original fabric). ), A minute clearance 9 is left between the tip of the cutter blade and the pedestal. This clearance 9
The size d is preferably about 0.005 mm to 0.03 mm, and more preferably about 0.01 mm. In this way, the configuration in which the clearance is left between the cutter blade 7 and the pedestal 8 prevents the blade edge of the cutter blade 7 from hitting the hard pedestal 8 to be damaged or worn, and the cutter blade 7 7 can be extended in life.

As shown in FIGS. 4 and 5, the tip shape of the cutter blade 7 is zigzag so that the saw blade 3a (see FIG. 2) is formed on the cut original fabric, and the bent portion 7 is formed.
A and 7b are not rounded but square. Thereby, the saw blade 3 of the paper saw blade 3 formed by the cutter blade 7
A sharp saw blade can be formed without causing the tip of a to be rounded.

The cutter blade 7 is a cutter cylinder 5.
Is provided so as to extend in the longitudinal direction, the term "extends in the longitudinal direction" in the present specification does not mean that it extends only in a direction parallel to the central axis of the cutter cylinder, but in an inclined direction. Is also included.
Therefore, the cutter blade 7 is not always the cutter cylinder 5.
Need not be provided in parallel with the central axis line, and may be inclined as necessary, or may be bent like a V-shape. An elastic material 10 such as a sponge is preferably provided on the downstream side of the cutter blade 7 if necessary. This elastic material 10 prevents the original fabric (paper saw blade) separated by the cutter blade 7 from sticking to the cutter cylinder 5.

The receiving table 8 provided on the receiving cylinder 6 is for supporting the raw material 1 to be cut by the cutter blade 7,
Usually a hard metal is used. As described above, since the cutter blade 7 is provided so as not to come into direct contact with the pedestal 8, even if the pedestal 8 is hard metal, the tip of the cutter blade 7 hits against it and is damaged or worn. There is no such thing. The pedestal 8 has a large number of suction holes 1 on the downstream side (right side in FIG. 3) of the position facing the cutter blade 7.
2 is formed, and a vacuum supply source is connected to the suction hole 12 via a valve. This valve is configured to apply a vacuum to the suction hole 12 while rotating about 180 ° from the position where the suction hole 12 faces upward and comes into contact with the original fabric to the position where the suction hole 12 faces downward. Suction hole 12
Can suck and hold the original fabric (paper saw blade 3) separated by the cutter blade 7 and convey it to the lower side. Therefore, the suction hole 12 and the mechanism for applying a vacuum thereto constitute suction means for suction-holding the separated original fabric.

In FIG. 1, each of the cutter cylinder 5 and the receiving cylinder 6 of this embodiment is provided with two cutter blades 7 and a pedestal 8 so that the cylinders 5 and 6 can be cut twice by one rotation. Although configured to do, the cutter blade 7
The number of the pedestals 8 can be appropriately increased or decreased, and the cutting may be performed once per one rotation of the cylinder, or may be performed three times or more.

In FIG. 1, reference numeral 15 is a conveying device for feeding the original fabric 1 into the rotary die cutter 2. The transport device 15 includes a pair of feed cylinders 16 and 16 which are driven to rotate in opposite directions in synchronization with each other. This feed cylinder 1
6 and 16 have cylindrical feed surfaces 17 and 17 in a part of the outer circumference in the circumferential direction.
At 7, the original fabric is nipped and conveyed. Here, the diameter of the cylindrical feed surface 17 is half the diameter of the circle drawn by the tip of the cutter blade 7 of the cutter cylinder 5, and the feed cylinder 16 is rotated once for one half rotation of the cutter cylinder 5. In addition, it is driven in synchronization with the cutter cylinder 5. Thus, the feed surfaces 17, 17 of the pair of feed cylinders 16, 16 can feed the raw material 1 between the cutter cylinder 5 and the receiving cylinder 6 of the rotary die cutter 2 at a speed synchronized with the speed of the cutter blade 7. it can. The diameter of the feed surface 17 of the feed cylinder 16 is not limited to half the diameter of the circle drawn by the tip of the cutter blade 7 of the cutter cylinder 5, and is a fraction of the diameter of the circle, equal to the diameter of the circle, or It may be an integral multiple thereof.

Here, the phase of the feed cylinder 16 (position of the feed surface 17) is as shown in FIG.
Immediately after the end of the nip of the original fabric 1 by the above, the cutter blade 7 of the rotary die cutter 2 is located at a position orthogonal to the pedestal 8, and it is determined to cut deeply into the original fabric.

In FIG. 1, reference numeral 20 denotes a stopper device for temporarily stopping the original fabric 1, and includes a fixed base 21 and a movable base 22 which are arranged with the original fabric 1 in between, and an air for moving the movable base 22. It has a drive device 23 such as a cylinder. The stopper device 20 is configured to operate immediately after the rotary die cutter 2 has finished cutting the raw material and to stop the raw material temporarily.

Reference numeral 25 is a reversing device arranged further upstream of the stopper device 20. The reversing device 25 includes a driving roller 26 and a pinch roller 27.
6, a servo motor 2 via a clutch (not shown)
8 is connected. This clutch and servo motor 2
Reference numeral 8 is for operating after the completion of the cutting of the raw fabric by the rotary die cutter 2 to drive the drive roller 26 in the direction to pull back the raw fabric 1 to pull back the tip of the raw fabric 1 to a predetermined position. Further, the drive roller 26 is provided with means (not shown) for measuring the amount of rotation of the drive roller 26 to measure the amount of feed and the amount of pullback of the original fabric 2, and the signal is used to control the servomotor 28. It has become. The reversing device 25 and the above-described conveying device 15 feed the raw material between the cutter cylinder and the receiving cylinder of the rotary die cutter at a speed synchronized with the speed of the cutter blade, and pull back the original material after the cutting is completed. An anti-conveyance reversing device is configured.

In FIG. 1, below the receiving cylinder 6, a paper saw blade 3 sucked and held by the receiving cylinder 6 is sent in synchronization with the rotation of the receiving cylinder 6.
A crimping device 32 for sticking to 0 is provided.
This crimping device 32 includes a support base 33 that supports the lower surface of the carton 30 that is sent, a rail 34 that horizontally holds the support base 33, an air cylinder 35 that raises and lowers the rail 34, and a support base. An air cylinder 36 with a spring connected to 33 is provided. This air cylinder 36
Serves as a shock absorber when the support table 33 moves as the receiving cylinder 6 rotates when the support table 33 is pressed against the receiving cylinder 6, and supports when the supporting table 33 is separated from the receiving cylinder 6. It serves to return the table 33 to its original position.

Next, the operation of the apparatus having the above configuration will be described.
In FIG. 1, the cylinders 5 and 6 of the rotary die cutter 2 and the feed cylinders 16 and 16 of the transfer device 15 are always rotating in synchronization with each other in a direction indicated by an arrow. Now, FIG. 6 (b)
As shown in, it is assumed that the leading end of the original 1 is stopped at a predetermined origin position A. By the rotation of the feed cylinders 16 and 16,
When the feed surfaces 17 and 17 move to the position where the original fabric 1 is nipped, the original fabric 1 is nipped and the conveyance is started, and the leading end of the original fabric is inserted between the cutter cylinder 5 and the receiving cylinder 6. The feed cylinders 16, 16 feed the front end of the original fabric 1 by a predetermined amount, and as shown in FIG.
When the nip is released, the cutter blade 7 of the rotary die cutter 2 cuts at a position separated by a predetermined distance L from the front end of the original fabric 1 supported by the pedestal 8. At this time, original 1
Has been conveyed by the feed cylinders 16 and 16 at the same speed as the cutter blade 7, so the cutter blade 7 cuts into the raw fabric 1 neatly and cuts the raw fabric 1 into the same shape as the cutter blade 7. However, the original fabric 1 is not completely separated, and one thin skin remains.

At the time when the cutter blade 7 cuts into the material 1, vacuum is applied to the suction hole 12 of the pedestal 8.
The original fabric (the part which becomes the paper saw blade 3) located thereabove is suction-held. Next, the stopper device 20 operates to grip the original fabric 1 and stop it. On the other hand, since the receiving cylinder 6 that adsorbs and holds the front end portion (paper saw blade 3) of the original fabric 1 continues to rotate, a tensile force acts between the paper saw blade 3 and the stopped original fabric 1, and both One thin skin left in between is torn, and eventually the paper saw blade 3 is separated from the tip of the raw fabric 1. In addition,
As described above, the stopper device 20 functions to separate the paper saw blade 3 from the leading end of the raw fabric 1 and also to reduce the amount of the raw fabric 1 delivered by inertia.

After that, after the grip of the original fabric 1 by the stopper device 20 is released, the reversing device 25 is activated to operate the original fabric 1.
6 is pulled back, and as shown in FIG. 6B, the leading end of the original fabric is positioned at the original origin position A to prepare for the next operation. FIG. 8 is a timing chart for explaining the above operation.

On the other hand, the receiving cylinder 6 holding the paper saw blade 3 by suction continues to rotate and conveys the held paper saw blade 3 downward. In FIG. 1, a carton 30 is conveyed toward a receiving cylinder 6 by a conveying device (not shown), glue is applied to a position where a paper saw blade should be attached on the way, and the carton 30 is sent onto a support base 33 at a predetermined timing. come. At this time, the support base 33 stands by at the lowered position. When the carton 30 is sent onto the support table 33 and the paper saw blade 3 held by the receiving cylinder 6 is sent onto the carton 30, the air cylinder 35 pushes up the rail 34 and lifts the support table 33. As a result, the carton 30 held by the support 33 is pressed against the paper saw blade 3, and the paper saw blade 3 is bonded to the carton 30. At this time, since the support base 33 moves in the same direction as the carton 30 and the receiving cylinder 6 move, the pressure bonding balance between the paper saw blade 3 and the carton 30 is maintained, and the sticking accuracy is improved. After the bonding of the paper saw blade 3 is completed, the rail 34 descends to separate the support base 33 from the cylinder 6, and the support base 33 is returned to its original position by the spring-loaded air cylinder 36 to prepare for the next operation.

By repeating the above operation, the original 1
The tip ends of the sheets are separated by a predetermined length L to form the paper saw blade 3, and the paper saw blade 3 is attached to the carton 30. Here, in order to change the separation length L of the leading end of the original fabric 1, the stop position of the leading end when the original fabric 1 is pulled back by the reversing device 25 [FIG.
The origin position A shown in (b) may be changed.

In the above embodiment, the cutter blade 7 is not in contact with the pedestal 8 and the original fabric 1 is cut with one thin skin left. However, instead of this, the cutter blade 7 is used.
It is also possible to adopt a configuration in which the original fabric 1 can be reliably separated by. In that case, although the stopper device 20 may be omitted, if the stopper device 20 is provided, the advance of the material 1 can be stopped immediately by the stopper device 20 after cutting the material, and the reversing device 25 can be used. The advantage of being able to reduce the amount of pullback is obtained.

Further, in the above-described embodiment, the original fabric is conveyed and fed between the cutter cylinder and the receiving cylinder of the rotary die cutter at a speed synchronized with the speed of the cutter blade, and the original fabric is pulled back after the completion of cutting. As
Conveying device 1 for feeding the raw material to the rotary die cutter 2
5 and the reversing device 25 for pulling back the original fabric are used separately, but the present invention is not limited to this configuration, and an apparatus having both a feeding function for feeding the original fabric and a reversing function for returning the original fabric is used. It is also possible to use. For example, it is possible to drive the driving roller 26 of the reversing device 25 in the illustrated embodiment in both forward and reverse directions and control the driving speed thereof, and the reversing device 25 can also function as the transport device 15. At that time, the function of feeding, stopping, and reversing the material may be electrically controlled by using a servo motor or the like, or may be mechanically controlled by a clutch and brake or the like.

In the above embodiment, the case where the raw fabric tip is cut into a jagged shape to make a paper saw blade has been described, but the present invention is not limited to this case, and the raw fabric tip is a member for other uses. It may be applied when separating to make. Further, the rotary die cutter 2 is not only provided with a cutter blade for separating the tip of the raw fabric, but also provided with a blade for punching out the raw fabric and a blade for making a cut in the raw fabric for punching or cutting. You may make it process.

[0034]

As described above, in the invention described in claim 1 of the present application, between the cutter blade provided on the cutter cylinder of the rotary die cutter and the pedestal of the receiving cylinder is provided by the original transport reverse device. Since the original fabric is fed at a speed that is synchronized with the moving speed of the cutter blade and the cutter blade is cut into the original fabric supported by the pedestal for cutting, the original fabric can be shaped into the shape of the cutter blade with good productivity. It is possible to accurately cut, and for example, by forming the blade edge of the cutter blade into a serrated shape so that the raw material to be cut forms a saw blade, a saw blade without a rounded tip can be formed. Furthermore, after cutting the raw fabric, the raw fabric tip is pulled back by the raw fabric transport reversing device, so that it is possible to cut at a position separated from the leading end of the raw fabric by an arbitrary distance.
It is possible to form paper saw blades with a short width.

Further, in the invention according to claim 2 of the present application, in order to feed the raw material into the rotary die cutter, a pair of feed cylinders having a cylindrical feed surface are provided in a part of the outer circumference in the circumferential direction. Since the transfer device is used, the transfer cylinder of the transfer device is simply rotated at a constant speed in synchronization with each cylinder of the rotary die cutter, and the leading edge of the original fabric is positioned at a predetermined position. A simple structure can be controlled by nipting the raw material between the feed surfaces of the pair of feed cylinders and feeding it so that a predetermined position comes into contact with the cutter blade from the tip and is fed at a speed synchronized with the speed of the cutter blade. The device allows the material to be fed into a rotary die cutter.

Further, in the invention according to claim 3 of the present application, since the tip of the cutter blade leaves a minute clearance with respect to the pedestal at the time of raw material cutting, the tip of the cutter blade abuts against the pedestal and is worn. And the life of the cutter blade can be extended. At this time, even when the cutter blade cuts into the original fabric, the original fabric is not completely separated and one thin skin is left. Since the original material on the opposite side is stopped by the stopper device, the uncut portion can be torn by the cutter blade and surely cut, and there is no problem.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing an embodiment in which the raw fabric cutting device of the present invention is applied to the manufacture and attachment of a paper saw blade member, that is, a paper saw blade.

FIG. 2 is a schematic plan view showing a paper saw blade and a front end of the raw fabric, which are formed by being separated from the raw fabric by the apparatus of the above embodiment.

FIG. 3 is an enlarged cross-sectional view of a main part of the rotary die cutter used in the above embodiment.

FIG. 4 is a schematic front view of the rotary die cutter.

FIG. 5 is a schematic plan view showing an enlarged cutting edge of a cutter blade of the rotary die cutter.

FIG. 6 is a view showing the conveying device and the rotary die cutter in the above-mentioned embodiment, (a) is a schematic sectional view showing a state at the time of cutting the original fabric, and (b) shows a standby state before the cutting of the original fabric. Schematic cross section

FIG. 7 is a timing chart of the cutting operation of the original fabric in the above embodiment.

[Explanation of symbols]

 1-Fabric 2-Rotary die cutter 3 Paper saw blade 5 Cutter cylinder 6 Receiving cylinder 7 Cutter blade 8 Receiving stand 12 Suction hole 15 Conveying device 16 Feeding cylinder 17 Feeding surface 20 Stopper device 21 Fixed stand 22 Movable stand 23 Drive unit 25 Reversing device 26 Drive motor 27 Pinch roller 28 Servo motor

Claims (3)

[Claims] 1. A rotary die cutter having a cutter cylinder having a cutter blade extending in the longitudinal direction on the outer peripheral surface thereof, and a receiving cylinder having a pedestal receiving the cutter blade on the outer peripheral surface thereof, and a raw material of the rotary die cutter. A raw fabric cutting device having a raw fabric conveying and reversing device that feeds the raw fabric between a cutter cylinder and a receiving cylinder at a speed synchronized with the velocity of a cutter blade, and pulls back the raw fabric after completion of cutting. 2. A rotary die cutter having a cutter cylinder having a cutter blade extending in the longitudinal direction on the outer peripheral surface and a receiving cylinder having a pedestal for receiving the cutter blade on the outer peripheral surface, and a part of the outer circumference in the circumferential direction. A pair of feed cylinders having a cylindrical feed surface in the area of, and the feed surface of the pair of feed cylinders allows the raw material to be synchronized between the cutter cylinder and the receiving cylinder of the rotary die cutter in synchronization with the speed of the cutter blade. A raw fabric cutting device having a feeding device for feeding the raw fabric and a reversing device for pulling back the raw fabric after the cutting of the raw fabric by the rotary die cutter. 3. A cutter cylinder and a receiving cylinder of the rotary die cutter are arranged so as to leave a minute clearance between the tip of the cutter blade and the pedestal when cutting the raw fabric, and the receiving cylinder is separated. And a suction means for sucking and holding the raw material, and further, in the transport path of the raw material supplied to the rotary die cutter, the raw material is temporarily stopped after the end of the cutting of the raw material by the rotary die cutter. The raw fabric cutting device according to claim 1, further comprising a stopper device.