JP2006255860A - Slitter device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slitter device which is free from a risk of an imbalance between a sheet feeding speed and a sheet material feeding speed and a risk of bending of a sheet material feeding direction even if the sheet material feeding speed is changed. <P>SOLUTION: The slitter device is formed of a slitter blade having an upper blade and a lower blade, and sheet material holding and carrying means which are arranged on upstream and downstream sides of the slitter blade in the sheet material carrying direction, for holding a sheet material and at the same time carrying the sheet material in a predetermined direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a slitter device, and in particular, even if the sheet material feeding speed is changed due to wear of the slitter blade, the balance between the sheet feeding speed and the sheet cutting speed is lost, and the sheet material feeding direction is bent. The present invention relates to a slitter device that does not occur.

  As a slitter device for cutting a sheet material along the conveying direction, two disk blades are provided coaxially with the slitter blades arranged so that the blade tip portions partially overlap each other. One having a conveyance roller is generally used (Patent Document 1).

  In the slitter device, the conveying roller and the slitter blade are simultaneously rotated to convey the sheet material with the conveying roller, and cut with the slitter blade.

In some of the slitter devices, a slitter blade and a transport roller are incorporated in the same shaft to simplify the structure (Patent Document 2).
JP-A-1-205996 Japanese Utility Model Publication No. 61-184690

  The cutting feed speed, which is the cutting speed of the sheet material in the slitter blade, changes when the cutting edge of the slitter blade is worn or scratched. Further, even if the width of the ear dust or the thickness of the sheet material changes when the sheet material is cut, the cutting feed speed changes.

  In the slitter device in which the slitter blade and the transport roller are concentrically arranged as in the conventional slitter device, when the cutting feed speed changes in the slitter blade, the cutting feed speed and the transport speed of the sheet material on the transport roller The balance between the two may be lost, the sheet material may be bent and sent, and the cutting edge may be bent.

  In addition, since there is an error in both the diameter of the slitter blade and the diameter of the conveying roller, the upper blade, the lower blade, and the conveying roller are based on the overlap amount, that is, the biting amount between the upper blade and the lower blade in the slitter blade. If the positional relationship is set, the nip of the conveying roller becomes unbalanced, and the sheet material cannot be uniformly nipped, so the sheet material cannot be fed linearly.

  On the other hand, when the nip balance of the conveying roller is adjusted to the reference, the overlap amount of the slitter blade may not be set to an optimum value, so that the cutting edge of the sheet may be distorted or the sheet material may not be cut.

  Therefore, in the conventional slitter apparatus, since both the slitter blade and the transport roller must be formed with high dimensional accuracy, the manufacturing cost increases, and in some cases, the slitter device cannot be manufactured.

  Also, when the slitter blade is blunted, it is common to re-grind the outer periphery of the slitter blade. However, if the slitter blade is re-polished, a difference in outer diameter occurs between the slitter blade and the conveyance roller. Also, it was necessary to regrind and match the slitter blade and diameter.

  The present invention has been made to solve the above problem, and the balance between the sheet feeding speed and the sheet material feeding speed is lost even if the sheet material feeding speed changes due to wear of the slitter blade or the like. An object of the present invention is to provide a slitter device in which the feeding direction of the sheet material is not bent.

  The invention according to claim 1 is a slitter device for cutting a sheet material into a predetermined width while conveying the sheet material in a predetermined direction, and a disk-shaped upper blade disposed so that the blade edge portions partially overlap each other, and A slitter blade having a lower blade and cutting the sheet material by rotating the upper blade and the lower blade, and disposed on the upstream side and the downstream side of the slitter blade along a conveying direction of the sheet material, And a sheet material holding / conveying means for conveying the sheet along the predetermined direction.

  In the slitter device, the sheet material is held at one or both sides by a sheet material holding and conveying means disposed upstream and downstream of the slitter blade and conveyed at a predetermined conveyance speed along the predetermined direction. The

  Therefore, since the sheet material conveyance direction and conveyance speed are determined by the sheet material holding and conveying means irrespective of the sheet material feeding speed of the slitter blade, the upper limit of the sheet material is not affected by the sheet material conveyance speed. The amount of overlap between the blade and the lower blade can be set to an optimum value. Further, even when the slitter blade is worn down and the diameter is reduced and the sheet material feeding speed is changed, the sheet material is not bent and fed.

  According to a second aspect of the present invention, in the slitter apparatus according to the first aspect, the sheet material holding and conveying means is a nip roller that nips and conveys the sheet material from both sides.

  In the slitter device, the sheet material can be fed straight by setting the nip pressure of the nip roller uniformly in the longitudinal direction and at an optimum value.

  According to a third aspect of the present invention, in the slitter device according to the second aspect, the conveying speed of the sheet material holding and conveying means positioned on the upstream side of the slitter blade is positioned on the downstream side of the slitter blade with respect to the conveying direction. The present invention relates to a sheet material holding and conveying means that is set lower than the conveying speed.

  In the slitter device, the sheet material receives a force pulled downstream between the sheet material holding / conveying means located on the upstream side of the slitter blade and the sheet material holding / conveying means located on the downstream side of the slitter blade. Therefore, the sheet material can be conveyed without slackening.

  According to a fourth aspect of the present invention, in the slitter device according to the third aspect, the sheet material feeding speed of the slitter blade is higher than the conveying speed of the sheet material holding and conveying means located on the upstream side of the slitter blade, The present invention relates to one that is set lower than the conveying speed of the sheet material holding and conveying means located on the downstream side of the slitter blade.

  In the slitter device, the sheet material feeding speed of the slitter blade is determined by the sheet material holding / conveying means positioned upstream of the slitter blade and the sheet material holding / conveying means positioned downstream of the slitter blade. Therefore, the sheet material is not loosened between the upstream sheet material holding and conveying means and the slitter blade, and between the slitter blade and the downstream sheet material holding and conveying means. Therefore, the sheet material can be sent stably.

  As described above, according to the present invention, even if the sheet material feed speed changes in the slitter blade, the balance between the sheet feed speed and the sheet cutting speed is not lost and the sheet material feed direction is not bent. Is provided.

  1. Embodiment 1

  Hereinafter, an example of the slitter device of the present invention will be described.

  As shown in FIG. 6, the slitter apparatus 100 according to the first embodiment performs lithographic printing one by one from a lithographic printing plate bundle B in which lithographic printing plates P cut to a predetermined size are stacked and laminated together with interleaving paper. It is a slitter device that takes out the plate P and cuts it into three strips in the width direction. Here, the planographic printing plate P is an example of a sheet material in the present invention.

  As shown in FIGS. 1 to 3, the slitter apparatus 100 includes a slitter blade 2 that cuts the lithographic printing plate P into a predetermined width, and an upstream located upstream of the slitter blade 2 along the conveying direction indicated by an arrow a. A side nip roller 4 and a downstream nip roller 6 positioned on the downstream side of the slitter blade 2 along the conveying direction a. The upstream nip roller 4 and the downstream nip roller 6 correspond to the sheet material holding and conveying means in the present invention.

  An aligning portion 8 is provided on the upstream side of the upstream nip roller 4 along the transport direction a, and the planographic printing plate P cut by the slitter blade 2 is transported downstream on the downstream side of the downstream nip roller 6. A conveyor 10 that is a belt conveyor is provided.

  A pass roller 40 is provided between the slitter device 100 and the transport conveyor 10 to deliver the planographic printing plate P to the transport conveyor 10.

  Each of the upstream nip roller 4 and the downstream nip roller 6 includes an upper roller 12 and a lower roller 14 as shown in FIGS. As shown in FIG. 1, the upper roller 12 and the lower roller 14 are both disposed so as to be orthogonal to the transport direction a. As shown in FIG. 1, three sets of upstream nip rollers 4 are arranged along the longitudinal direction, and four sets of downstream nip rollers 6 are arranged along the longitudinal direction.

  In any of the upstream nip roller 4 and the downstream nip roller 6, the upper roller 12 is pressed against the lower roller 14 by an air cylinder (not shown). Therefore, the pressing force with which the upper roller 12 presses the lower roller 14 can be changed by changing the air pressure supplied to the air cylinder. The upstream nip roller 4 and the downstream nip roller 6 are arranged so that the distance between the axes of the upper rollers 12 and the lower rollers is shorter than the dimension along the transport direction a of the planographic printing plate P. It is installed.

  As shown in FIG. 1, the slitter blade 2 includes two trimming blades 2A provided at both ends, and a center blade 2B provided at the center. The trimming blade 2A has a function of trimming both side edges of the planographic printing plate P, and the center blade 2B has a function of cutting the planographic printing plate P into three. The trimming blade 2A and the center blade 2B are provided coaxially.

  As shown in FIG. 4, the trimming blade 2 </ b> A includes a disk-shaped upper blade 16 positioned above the transport path of the planographic printing plate P and a disk-shaped lower blade positioned below the transport path of the planographic printing plate P. 18. The lower blade 18 is disposed closer to the center than the upper blade 16 so that the upper blade 16 and the cutting edge partially overlap.

  Adjacent to the outer side of the upper blade 16, the ear receiving roller 20 is adjacent to the center of the upper blade 16, and the upper rubber roller 22 is disposed coaxially with the upper blade 16. The ear receiving roller 20 and the upper rubber roller 22 are both coated or formed with rubber so that the plate-making layer of the planographic printing plate P is not damaged. The ear receiving roller 20 and the upper rubber roller 22 are attached so as to rotate coaxially with the upper blade 16 and integrally therewith. The ear receiving roller 20 and the upper rubber roller 22 can be omitted.

  On the other hand, an ear receiver 24 is provided adjacent to the outside of the lower blade 18 to receive the strip-shaped ear dust e generated from the lower plate 18 by trimming the planographic printing plate P with the upper blade 16 and the lower blade 18. A lower rubber roller 26 that receives a planographic printing plate P trimmed by the lower blade 18 from below is provided adjacent to the center of the lower blade 18. The ear receiver 24 and the lower rubber roller 26 are formed so as to rotate integrally with the lower blade 18. The lower rubber roller 26 is also coated or formed with a rubber surface.

  The upper blade 16 is pressed against the lower blade 18 by a disc spring 17. The ear receiving roller 20 is nipped by the ear receiving 24 and the upper rubber roller 22 is nipped by the lower rubber roller 26 with a predetermined nip pressure.

  The center blade 2 </ b> B has a pair of upper blades 16 disposed at the center and a lower blade 18 disposed outside the upper blade 16. The upper blade 16 is positioned above the transport path of the planographic printing plate P, and the lower blade 18 is positioned below the transport path. The lower blade 18 is disposed such that a part of the blade edge contacts the blade edge of the upper blade 16. The upper blade 16 is pressed against the lower blade 18 by a disc spring 17.

  A pair of upper rubber rollers 22 are coaxially disposed outside the upper blade 16. On the other hand, on the inner side of the lower blade 18, a pair of ear receiving portions 24 that receive the ear dust e generated by cutting the planographic printing plate P with the upper blade 16 and the lower blade 18 from below are provided coaxially, and on the outside The lower rubber roller 26 is provided coaxially with a pair.

  Also in the center blade 2B, the upper blade 16 rotates integrally with the upper rubber roller 22, and the lower blade 18 rotates so as to rotate integrally with the lower rubber roller 26 and the ear receiving portion 24. The upper rubber roller 22 can be omitted also in the center blade 2B.

  As shown in FIGS. 1 and 2, the aligning unit 8 includes an aligning roller 30 provided so as to sandwich the transport path of the planographic printing plate P and narrow in the transport direction a, and the planographic plate A slitting device 100 by supporting the printing plate P from below, a stopper 34 provided concealably downstream of the supporting guide plate 32, and pushing the planographic printing plate P along the transport direction a. And a supply pusher 36 to be supplied.

  As shown in FIG. 3, the slitter device 100 is provided with a guide plate 50 that guides along a predetermined transport path while supporting the planographic printing plate P from below along the transport path of the planographic printing plate P. Yes. Further, an ear dust shooter 52 for guiding the ear dust e generated by cutting the planographic printing plate P with the slitter blade 2 to a lower ear dust receptacle (not shown) is also provided. The ear dust shooter 52 is provided closer to the slitter blade 2 than the lower ear dust shooter 52B receiving the ear dust e from below, and the ear generated by cutting the planographic printing plate P with the slitter blade 2 The upper ear waste shooter 52A is configured to bend the waste e downward.

  Hereinafter, the operation of the slitter device 100 according to the first embodiment will be described.

  As shown in FIG. 6, a lithographic printing plate bundle B on which a lithographic printing plate P in which a lithographic printing layer P is covered with protective paper is placed on a pallet is carried into a lithographic printing plate supply unit.

  Then, as shown in FIG. 6 (A), the lithographic printing plate P is taken out one by one with the interleaving paper by a lithographic printing plate take-out sucker (not shown) provided in the lithographic printing plate supply unit, and aligned. It conveys to the part 8.

  In the aligning unit 8, the planographic printing plate P is pushed on the support guide plate 32 along the transport direction a by the supply pusher 36, and the long side is aligned with the cutting direction of the slitter blade 2 by the aligning roller 30. Aligned at right angles.

  The planographic printing plate P that has been aligned in the aligning unit 8 is fed by the supply pusher 36 until the leading end is gripped between the upper roller 12 and the lower roller 14 in the upstream nip roller 4.

  The planographic printing plate P is fed toward the slitter blade 2 by the upstream nip roller 4 when the leading end is gripped between the upper roller 12 and the lower roller 14 in the upstream nip roller 4.

  As shown in FIG. 6B, the planographic printing plate P is trimmed at both side edges by the trimming blade 2A and cut into three by the center blade 2B.

In any of the trimming blade 2A and the center blade 2B, the planographic printing plate P is cut by the upper blade 16 and the lower blade 18. The cut lithographic printing plate P is nipped by the upper rubber roller 22 and the lower rubber roller 26 and conveyed toward the downstream nip roller 6.
On the other hand, the ear dust e generated by the cutting is nipped between the ear receiving roller 20 and the ear receiving portion 24 in the trimming blade 2A, and is conveyed along the conveying direction a by the ear receiving portion 24 in the center blade 2B. The ear waste shooter 52 guides the ear waste to the ear waste receptacle. The ear dust e transported along the transport direction a by the ear receiver 24 is bent downward by the upper ear waste shooter 52A in the ear waste shooter 52 and supported from below by the lower ear waste shooter 52B. Guided to the waste bin.
In this way, the lithographic printing plate P after cutting is separated from the ear dust e and sent to the downstream nip roller 6. In this state, the planographic printing plate P is fed along the transport direction a while being cut in a state of being held at two locations by the upstream nip roller 4 and the upper rubber roller 22 and the lower rubber roller 26 in the slitter blade 2.

  Here, since the distance along the conveyance direction a between the upstream nip roller 4 and the downstream nip roller 6 is smaller than the dimension along the conveyance direction a of the lithographic printing plate P, the lithographic plate fed along the conveyance direction a Even when the leading edge of the printing plate P reaches the downstream nip roller 6, the planographic printing plate P is also held by the upper rubber roller 22 and the lower rubber roller 26 in the upstream nip roller 4 and the slitter blade 2. Therefore, when the leading edge of the planographic printing plate P reaches the downstream nip roller 6, it is held by the upstream nip roller 4, the upper rubber roller 22, the lower rubber roller 26, and the downstream nip roller 6, and is cut by the slitter blade 2. Is done.

  As the cutting of the lithographic printing plate P proceeds, the rear end of the lithographic printing plate P is disengaged from the upstream nip roller 4. In the held state, the sheet is cut along the transfer direction a by the slitter blade 2 while being transferred.

  Here, in the slitter blade 2, the peripheral speed between the upper blade 16 and the lower blade 18 is such that the feeding speed of the planographic printing plate P by the upper rubber roller 22 and the lower rubber roller 26 is the upper roller 12 and the lower roller in the upstream nip roller 4. It is set to be faster than the peripheral speed of the side roller 14 and slower than the peripheral speed of the upper roller 12 and the lower roller 14 in the downstream nip roller 6.

  Therefore, the lithographic printing plate P is always cut in two or three places along the transport direction a in both the upstream nip roller 4 and the slitter blade 2 and the slitter blade 2 and the downstream nip roller 6. In addition, since it receives a force that extends along the conveyance direction a, it does not loosen during cutting. Therefore, no matter how the upper blade 16 and the lower blade 18 are set in the slitter blade 2, the planographic printing plate P is fed straight along the transport direction a.

  The planographic printing plate P that has been cut with the slitter blade 2 is sent to the conveyor 10 by the pass rollers 40 as shown in FIG.

  The example of the slitter device using the nip roller as the sheet material holding and conveying unit has been described above. However, as the sheet material holding and conveying unit, a suction conveyor may be provided instead of the upstream nip roller 4 and the downstream nip roller 6. . Further, only one of the upstream nip roller 4 and the downstream nip roller 6 may be replaced with a suction conveyor.

  The slitter apparatus of the present invention can be used not only for cutting a web- or sheet-like lithographic printing plate to a predetermined width, but also for various metal sheet materials such as aluminum and stainless steel, paper, fabric, and plastic sheets. Etc. can also be preferably used to cut a predetermined width.

FIG. 1 is a schematic top view showing an outline of the configuration of the slitter device according to the first embodiment and its periphery as viewed from above. FIG. 2 is a schematic side view showing an outline of the configuration of the slitter device according to the first embodiment and the periphery thereof viewed from the side. FIG. 3 is an enlarged view showing an arrangement of each component of the slitter device according to the first embodiment. FIG. 4 is an enlarged view showing details of the configuration of the trimming blades disposed at both ends of the slitter blades in the slitter device according to the first embodiment. FIG. 5 is an enlarged view showing details of the configuration of the center blades disposed at both ends of the slitter blades in the slitter device according to the first embodiment. FIG. 6 is an explanatory diagram illustrating a procedure for cutting a planographic printing plate using the slitter device according to the first embodiment.

Explanation of symbols

2 Slitter blade 2A Trimming blade 2B Center blade 4 Upstream nip roller 6 Roller 6 Downstream nip roller 8 Aligning section 10 Conveyor 12 Upper roller 14 Lower roller 16 Upper blade 18 Lower blade 20 Ear receiving roller 22 Upper rubber roller 24 Ear receiving section 26 Lower rubber roller 30 Aligning roller 32 Support guide plate 34 Stopper 36 Supply pusher 40 Pass roller 50 Guide plate 52 Ear dust shooter 100 Slitter device

Claims (4)

A slitter device that cuts a sheet material to a predetermined width while conveying the sheet material in a predetermined direction,
A slitter blade that has a disk-shaped upper blade and a lower blade arranged so that the blade edge portions partially overlap, and cuts the sheet material by rotating the upper blade and the lower blade;
The sheet material holding and conveying means is provided on the upstream side and the downstream side of the slitter blade along the sheet material conveying direction and conveys the sheet material along the predetermined direction while holding the sheet material. Characteristic slitter device.   2. The slitter device according to claim 1, wherein the sheet material holding and conveying unit is a nip roller that nips and conveys the sheet material from both sides.   Of the nip rollers, the conveying speed of the sheet material holding and conveying means located on the upstream side of the slitter blade with respect to the conveying direction is the conveyance speed of the sheet material holding and conveying means located on the downstream side of the slitter blade with respect to the conveying direction. The slitter device according to claim 2, wherein the slitter device is set lower than the speed.   The sheet material feeding speed of the slitter blade is higher than the conveying speed of the sheet material holding and conveying means positioned upstream of the slitter blade and lower than the conveying speed of the sheet material holding and conveying means positioned downstream of the slitter blade. The slitter device according to claim 3, wherein the slitter device is set.

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