JP4494864B2 - Stencil printing machine - Google Patents

Description

  The present invention relates to a stencil printing machine, which relates to a stencil printing machine for supplying a plate-making plate material to a printing apparatus.

  In the stencil printing machine, the plate material made by the plate making apparatus is supplied to the printing apparatus by the plate supplying apparatus. The plate material supplied to the printing apparatus is clamped by the plate material clamping means and mounted on a plate material mounting body such as a plate cylinder. In the printing apparatus, printing is performed based on the mounted plate material.

  By the way, in the plate supply apparatus, when supplying the plate material to the plate material clamping means of the printing apparatus, it is desired to convey the plate material so as not to generate undulations and wrinkles. As a technique for that purpose, for example, there are those disclosed in Patent Documents 1 and 2.

  On the other hand, as the plate material, a material obtained by bonding an ink permeable sheet as a support to a thermoplastic resin film is generally used. However, various inconveniences have been pointed out regarding the use of such a plate material, as shown in Patent Document 3. Accordingly, it is desired to use a plate material that is not bonded with an ink-permeable sheet, that is, a plate material that is substantially made only of a thermoplastic resin film. An example of such a plate material is disclosed in Patent Document 4. The plate material disclosed in Patent Document 4 is composed only of a thermoplastic resin film having a large number of minute recesses formed on one surface.

JP 2000-127595 A Japanese Patent No. 3417591 JP 2003-112402 A JP 2001-213065 A

  However, with the techniques disclosed in Patent Documents 1 and 2, it has not been possible to sufficiently prevent waving and wrinkling from occurring in the plate material during plate feeding.

  Furthermore, it has become desirable to sufficiently prevent the generation of waviness and wrinkles in a plate material even when a plate material substantially consisting only of a thermoplastic resin film is supplied.

  The present invention can sufficiently prevent the generation of waviness and wrinkles in the plate material, particularly when the plate material is supplied only with a thermoplastic resin film. An object of the present invention is to provide a plate-feeding device that can be used.

  The invention described in claim 1 is a stencil printing machine, in which a plate-making plate material is supplied to a printing device, and includes a cylindrical roller for conveying the plate material along the outer peripheral surface to the printing device. The roller is formed with a through slit extending in a direction orthogonal to the conveying direction, and a buffer member is disposed on the outer peripheral surface of the roller to avoid the through slit, and the outer peripheral surface of the roller A cover guide is provided so as to constitute a plate material transport path in contact with the buffer member between the part of the plate material, and the plate material that has passed through the plate material transport path is projected by a protrusion that protrudes from the through slit, The present invention is characterized in that projecting means is provided to be pushed into the clamping portion of the plate material clamping means of the printing apparatus.

  One or more through slits may be provided. Further, the protruding means may be provided either inside or outside the roller. Further, when the protruding means is provided inside the roller, the protruding means may be provided so as to rotate together with the roller, or may be provided as being fixed independently of the rotation of the roller. Further, when the protruding means is provided outside the roller, it is necessary to provide two through slits at the opposing position of the roller so that the protruding portion passes through the roller and advances and retracts.

  The invention according to claim 2 is the invention according to claim 1, wherein a slit for cutting is formed in the cover guide for inserting a cutter for cutting the plate material passing through the plate material conveyance path. It is.

  The invention according to claim 3 is the invention according to claim 2, wherein a plate extending from the edge on the downstream side in the transport direction of the cutting slit toward the upstream side in the transport direction is provided on the outer surface of the cover guide. It is.

  According to the first aspect of the invention, since the plate material is conveyed through the plate material conveyance path in a state of being sandwiched between the cover guide and the buffer member, tension can be applied to the plate material. Waves and wrinkles can be prevented from occurring in the plate material. Further, when the plate material is clamped by the plate material clamping means, the plate material is pushed into the clamping portion by the projecting portion, so that tension can be applied to the plate material. It can be prevented from occurring. Therefore, according to the plate supply apparatus of the present invention, the plate material can be supplied to the printing apparatus without generating undulations or wrinkles. In particular, even when the plate material is substantially composed only of a thermoplastic resin film, the plate can be fed to the printing apparatus without generating undulations or wrinkles.

  According to the second aspect of the present invention, it is possible to cut the plate material in a state where no waviness or wrinkle is generated, and thus the plate material can be cut well.

  According to the invention described in claim 3, the leading edge of the plate material can be directed into the plate material conveyance path by the base end portion of the plate. Therefore, it is possible to prevent the leading edge of the plate material from coming out of the cover guide through the cutting slit.

  FIG. 1 is a schematic cross-sectional view of a stencil printing machine provided with a plate feeding apparatus of the present invention. In the stencil printing machine 1, the plate material 10 is supplied from the roll 21 of the supply unit 2, and is made by being heated and punched by the thermal head 31 in the plate making apparatus 3, and from the plate supplying apparatus 4 to the printing apparatus 5. The edition will be supplied. The printing apparatus 5 includes a multi-cylinder type plate material mounting body 9 having two rollers 91 and 92, and the supplied plate material 10 is mounted on the plate material mounting body 9. The printing device 5 may be a single cylinder type. On the other hand, the printing paper 61 is fed to the printing device 5 by the paper feeding device 6. In the printing apparatus 5, the printing paper 61 is pressed against the roller 92 by the press roller 62 that is a pressing unit, and printing based on the plate material 10 is performed. After the printing is finished, the printed paper 61 is sent to the paper discharge tray 72 by the paper discharge roller 71 of the paper discharge device 7, and the plate material 10 used for printing is peeled off from the printing device 5 by the plate discharge device 8. Collected.

  In the stencil printing machine 1 operating as described above, the plate feeding device 4 of the present invention is configured as follows. FIG. 2 is a longitudinal sectional view of the plate feeding device 4. The plate feeding device 4 includes a cylindrical roller 40 that transports the plate material 10 along the outer peripheral surface to the printing device 5, a cover guide 41, and a protruding means 42.

  FIG. 3 is an external perspective view of the roller 40. The roller 40 is formed with four through slits 45 extending in a direction orthogonal to the transport direction (arrow A direction). A buffer member 46 is disposed on the outer peripheral surface 401 of the roller 40 in parallel with the through slit 45 so as to avoid the through slit 45. The buffer member 46 is, for example, a sponge.

  As shown in FIG. 2, the cover guide 41 is provided so as to constitute a plate material conveyance path 400 that conveys the plate material 10 between a part of the outer peripheral surface 401 of the roller 40. The cover guide 41 is provided in pressure contact with the surface of the buffer member 46 so that the plate material 10 passing through the plate material conveyance path 400 is sandwiched between the cover guide 41 and the buffer member 46. It has become. However, in the drawing, the plate material conveyance path 400 is expressed as a gap for convenience of display. Specifically, the cover guide 41 has a circular arc cross section, is provided so as to cover approximately ¼ of the outer peripheral surface of the roller 40, and the outer peripheral surface of the upper half of the roller 40 on the printing device 5 side. Covering. An edge 411 of the cover guide 41 on the plate making apparatus 3 side slightly extends obliquely upward so as to be away from the outer peripheral surface of the roller 40. A cutting slit 412 extending in a direction orthogonal to the transport direction is formed at the end of the cover guide 41 on the printing apparatus 5 side. The cutting slit 412 is for inserting a cutter 413 (FIG. 11) for cutting the plate material 10 passing through the plate material conveyance path 400. Further, a plate 414 extending from the edge of the cutting slit 412 on the downstream side in the conveyance direction toward the upstream side in the conveyance direction is provided on the outer surface of the cover guide 41.

  The protruding means 42 is arranged inside the roller 40 so as to push the plate material 10 that has passed through the plate material conveying path 400 into the holding portion 510 of the plate material holding means 51 of the printing apparatus 5 by the protruding portion 421 protruding from the through slit 45. Is provided. The plate material mounting body 9 includes a plate material clamping means 51 for clamping the leading end portion of the plate material 10 and a plate material clamping means 52 for clamping the rear end portion of the plate material 10. Yes.

  FIG. 4 is a partial perspective view of the protruding means 42. The protruding means 42 includes a plate-shaped protruding portion 421 and a drive mechanism 420 for the protruding portion 421. The driving mechanism 420 includes a horizontal horizontal arm 422 that supports the protruding portion 421 at the end, a vertical arm 423 that supports the horizontal horizontal arm 422 at the end, and a horizontal vertical arm 424 that supports the vertical arm 423 at the lower end. And a rotation arm 425 that supports the horizontal vertical arm 424 at the end, and a rotation shaft 426. The horizontal lateral arm 422 extends through the long hole 428 of the vertical wall 427. When the drive mechanism 420 rotates the rotation arm 425 around the rotation axis 426 as indicated by the arrow B, the horizontal vertical arm 424 moves as indicated by the arrow C, and the vertical arm 423 moves along the horizontal horizontal arm 422 and the protruding portion. It moves like the arrow D with 421, and makes the protrusion part 421 protrude by it. In order to retract the projecting portion 421, the pivot arm 425 may be pivoted in the opposite arrow B direction.

The plate feeder 4 having the above-described configuration operates as follows.
As shown in FIG. 5, the plate material 10 made by the plate making apparatus 3 enters the plate material conveyance path 400 below the edge 411 from the upstream side in the conveyance direction. In the plate feeding device 4, the plate material 10 is conveyed in the plate material conveyance path 400 as the roller 40 rotates, and when the leading end portion 101 of the plate material 10 comes out of the cover guide 41 as shown in FIG. 6. The rotation of the roller 40 is stopped. At this time, the distal end portion 101 is located on the through slit 45. Next, as shown in FIG. 7, the protruding portion 421 of the protruding means 42 passes through the through slit 45, and the holding portion of the plate material holding means 51 of the printing apparatus 5 with the tip portion 101 of the printing material 10. Projects to 510 and stops. As a result, the tip portion 101 of the plate 10 is pushed into the clamping portion 510 by the tip of the protruding portion 421. Next, as shown in FIG. 8, the sandwiching portion 510 of the plate material sandwiching means 51 is closed and the projecting portion 421 is retracted into the roller 40 through the through slit 45. As a result, the front end portion 101 of the plate material 10 is held in a folded state by the holding portion 510 of the plate material holding means 51.

  Next, as shown in FIG. 9, as the plate material mounting body 9 rotates, the plate material clamping means 51 moves together with the front end portion 101 of the plate material 10, and the roller 40 rotates to rotate the plate material 10. Is conveyed in the plate material conveyance path 400. Next, as shown in FIG. 10, when the plate material clamping means 52 of the plate material mounting body 9 reaches the original position of the plate material clamping means 51, the rotation of the plate material mounting body 9 stops. On the other hand, the rotation of the roller 40 is also stopped. At this time, the through slit 45 faces the plate material clamping means 52. Then, the protruding portion 421 of the protruding means 42 passes through the through slit 45 and protrudes to the inside of the clamping portion 520 of the plate material clamping means 52 with the rear end portion 102 of the plate material 10, and stops. Next, as shown in FIG. 11, the clamping portion 520 of the plate material clamping means 52 is closed and the protruding portion 421 is retracted into the roller 40 through the through slit 45, and at the same time, the cutter 413 is inserted from the cutting slit 412. The rear edge of the rear end portion 102 is cut off. As a result, a single plate material 10 is mounted on the plate material mounting body 9.

  As described above, in the plate feeder 4 having the above-described configuration, the plate material 10 is conveyed through the plate material conveyance path 400 while being sandwiched between the cover guide 41 and the buffer member 46, so that tension is applied during conveyance. It will be in the state. Therefore, according to the plate feeder 4 having the above-described configuration, it is possible to prevent the plate material 10 from being wavy and wrinkled during conveyance.

  Further, when the plate material 10 is clamped by the plate material clamping means 51, 52, the protruding portion 421 protrudes with the plate material 10 in place, so that the plate material 10 is in a state in which tension is applied during clamping. It becomes. Therefore, according to the plate feeding device 4 having the above-described configuration, it is possible to prevent the plate material 10 from being wavy or wrinkled during clamping.

  Therefore, according to the plate feeding device 4 having the above-described configuration, the plate material 10 can be fed to the printing device 5 without generating undulations and wrinkles. In particular, even when the plate material 10 is substantially made only of a thermoplastic resin film, the plate can be fed to the printing apparatus 5 without generating undulations or wrinkles.

  Further, in the plate feeder 4 having the above-described configuration, since the cutting slit 412 is formed in the cover guide 41, it is possible to cut the plate material 10 in a state where no waviness or wrinkle is generated. The material 10 can be cut well. Moreover, since the cutting slit 412 is formed at the end of the cover guide 41 on the printing device 5 side (downstream in the transport direction), it is formed in the rear end portion 102 of the plate material 10 held by the plate material holding means 52. It is possible to prevent the wasted plate material 10 from being attached for a long time.

  Further, in the plate feeder 4 having the above-described configuration, the outer surface of the cover guide 41 is provided with the plate 414 extending from the edge on the downstream side in the transport direction of the cutting slit 412 toward the upstream side in the transport direction. The leading edge 103 of the plate material 10 is directed into the plate material conveyance path 400 by the base end portion 4141 of the plate 414. The same applies to the leading edge 103 (FIG. 11) of the upstream plate member 10 of the plate member 10 immediately after being cut by the cutter 413. Therefore, according to the plate feeder 4 having the above-described configuration, it is possible to prevent the leading edge 103 of the plate material 10 from coming out of the cover guide 41 from the cutting slit 412.

  In addition, you may provide the buffer member 46 of the outer peripheral surface 401 of the roller 40 in a spiral form, as shown in FIG. According to this, the plate material 10 comes into contact with the surface of the buffer member 46 at a large number of locations in the conveyance direction and in the direction orthogonal thereto on the outer peripheral surface 401 of the roller 40. Generation of undulations and wrinkles is better prevented.

  Further, in the plate feeding device 4 having the above-described configuration, the protruding means 42 is provided as being fixed regardless of the rotation of the roller 40. However, as shown in FIG. Also good. In FIG. 14, the protruding portion 421 always faces one through slit 45. According to this configuration, the work of matching the through slit 45 with the opposing position of the protruding portion 421 every time the plate is supplied can be made unnecessary, so that the workability can be improved.

  Furthermore, in the plate feeding device 4 having the above-described configuration, the protruding means 42 is provided inside the roller 40, but may be provided outside the roller 40 as shown in FIG. In FIG. 15, the protruding portion 421 protrudes through two through slits 45 formed at positions facing the roller 40. According to this configuration, since the trouble of providing the protruding means 42 inside the roller 40 can be eliminated, the plate feeder 4 can be easily manufactured.

  Since the plate feeding device 4 of the present invention can sufficiently prevent the plate material 10 from being wavy and wrinkled even when the plate material 10 consisting essentially of a thermoplastic resin film is fed. Industrial utility value is great.

1 is a schematic cross-sectional view of a stencil printing machine provided with a plate feeding apparatus of the present invention. It is a longitudinal cross-sectional view of the plate feeding apparatus of FIG. It is an external appearance perspective view of a roller. It is a perspective partial view of a protrusion means. It is a longitudinal cross-sectional view which shows the action | operation of a plate feeding apparatus. It is a longitudinal cross-sectional view which shows the operation | movement following FIG. 5 of a plate feeding apparatus. It is a longitudinal cross-sectional view which shows the operation | movement following FIG. 6 of a plate feeding apparatus. It is a longitudinal cross-sectional view which shows the operation | movement following FIG. 7 of a plate feeding apparatus. It is a longitudinal cross-sectional view which shows the operation | movement following FIG. 8 of a plate feeding apparatus. It is a longitudinal cross-sectional view which shows the operation | movement following FIG. 9 of a plate feeding apparatus. It is a longitudinal cross-sectional view which shows the operation | movement following FIG. 10 of a plate feeding apparatus. It is an enlarged vertical sectional view showing one operating state of the plate feeder. It is an external appearance perspective view of another example of a roller. It is a longitudinal cross-sectional view which shows another example of a plate feeding apparatus. It is a longitudinal cross-sectional view which shows another example of the plate feeding apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stencil printing machine 10 Plate material 4 Plate feeding apparatus 40 Roller 400 Plate material conveyance path 401 Outer peripheral surface 41 Cover guide 412 Cutting slit 413 Cutter 414 Plate 42 Protruding means 421 Protruding part 45 Through slit 46 Buffering member 5 Printing device 51, 52 Plate material clamping means 510, 520 clamping part

Claims (3)

In a stencil printing machine, in a stencil feeding machine, which supplies a plate-making plate material to a printing machine,
It has a cylindrical roller that conveys the plate material along the outer peripheral surface to the printing device,
The roller is formed with a through slit extending in a direction perpendicular to the conveying direction,
A buffer member is disposed on the outer peripheral surface of the roller so as to avoid a through slit, and a cover is formed between the roller and a part of the outer peripheral surface of the roller so as to contact the buffer member to form a plate material conveyance path. There is a guide,
A stencil printing machine characterized in that a projecting means is provided for pushing a plate material that has passed through a plate material conveying path into a clamping part of a printing material clamping means of a printing apparatus by a projecting part that projects from a through slit. Plate feeder.   The stencil feeder of a stencil printing machine according to claim 1, wherein a slit for cutting is inserted into the cover guide for inserting a cutter for cutting the plate material passing through the plate material conveyance path. The stencil feeder of a stencil printing machine according to claim 2, wherein a plate is provided on an outer surface of the cover guide so as to extend from an edge of the cutting slit downstream in the conveying direction toward the upstream in the conveying direction.

Images