JP3157994U - Stencil machine for stencil printing machine - Google Patents

Abstract

A stencil discharging apparatus for a stencil printing machine capable of preventing a stencil sheet from remaining in a housing with a simple structure. A stencil container 43 which is retractably stored in a stencil printing machine and has an open upper surface, and a stencil sheet N which has been wound around a printing plate cylinder and used for printing, are sandwiched in the stencil container 43. A stencil discharging apparatus of a stencil printing machine including a pair of upper and lower drawing rollers for drawing. An upward scraping claw 64 that can be engaged with the stencil sheet immediately after passing through the drawing roller 42 is formed at the end of the plate discharging container 43 on the drawing roller 42 side. A band plate-shaped or bar-shaped pressing member 66 that extends in the width direction of the plate discharging container 43 and can suppress a part of the stencil sheet N in the plate discharging container 43 from above is disposed. The pressing member is connected to an arm 67 that is swingably supported in the vertical direction on the plate discharging container, and is configured to move up and down by swinging the arm. [Selection] Figure 2

Description

  The present invention is a pair of upper and lower plates that are housed in a stencil printing machine so that they can be drawn out and have an open upper surface, and a stencil sheet that is wound around a printing plate cylinder and used for printing, and is drawn into the stencil container. And a stencil discharging apparatus of the stencil printing machine.

  A stencil printing machine generally includes a plate making apparatus, a printing plate cylinder having an ink supply mechanism, and a discharging apparatus. The stencil sheet made by the plate making apparatus is mounted on the outer peripheral surface of the printing plate cylinder for printing. By rotating the plate cylinder, the image of the stencil sheet of the printing paper is transferred to the printing paper.

  Then, when printing a predetermined number of sheets and printing another image, the used stencil sheet on the surface of the printing plate cylinder is discharged into the discharge plate container by the rotation of the pair of drawing rollers, Install the following new stencil paper into the printing cylinder.

  When the used stencil sheet is pushed into the above-mentioned stencil container one after another and becomes almost full, the stencil container is pulled out from the housing of the stencil printing machine, and the stencil sheet stored in the stencil container is in the trash box. And the empty waste container is mounted again in the housing.

  However, when the quantity of stencil paper stored in the stencil container increases, the last drawn stencil paper is not completely discharged from the squeeze roller into the stencil container, and the end of the stencil paper is sandwiched between the stencil rollers. Or the end of the stencil sheet may remain attached to the drawing roller with ink. In addition, when the quantity of stencil paper stored in the stencil container in the stencil container increases, the stencil paper protrudes upward from the stencil container, and when the stencil paper is pulled out, the stencil paper is caught in the housing and remains in the housing. Or, when the discharge container is pulled out, the stencil sheet that protrudes may become clogged between the discharge container and the housing, and the discharge operation may be difficult.

  When the stencil sheet remains in the housing, the inside of the stencil printer is soiled by the ink adhering to the stencil sheet, and it takes time to take out the remaining stencil sheet. Moreover, when taking out, a hand will become dirty with ink.

In order to eliminate such residual stencil paper in the housing, there is a conventional stencil discharging apparatus provided with a clamp device that clamps the stencil paper located inside the housing when the stencil container is full (Patent Document 1). There is also a plate discharging apparatus provided with a cover that covers the entire upper surface of the plate discharging container so as to be openable and closable in order to prevent the stencil sheet in the plate discharging container from protruding upward (Patent Document 2).
JP-A-2005-74810. JP-A 61-185471.

  In the former prior art, it is necessary to provide two clamp arms that are vertically opposed to each other for the clamp device, which increases the number of parts. Further, when the stencil sheet stored in the stencil container is discarded into a trash box or the like, the upper clamp arm must be removed, which takes time and effort.

  In the latter prior art, the upward swelling of the stencil sheet can be suppressed by the cover, but since the cover covering the entire upper surface of the stencil container is attached, the material cost increases and the weight of the stencil container also increases. The stencil sheet stored in the stencil container easily adheres to the cover, and the stencil sheet that has adhered needs to be removed by hand, and it takes time to clean the ink adhered to the cover.

[Purpose of the idea]
The purpose of the present invention is a plate discharging device with a small number of parts and a simple structure, and when the stencil paper stored in the plate discharging container is disposed of, it can be reliably prevented from remaining in the housing of the stencil paper, It is an object of the present invention to provide a plate discharging device that can easily discard all stencil sheets from a plate discharging container without contaminating the housing or the like of the plate discharging device.

  In order to solve the above-described problems, the present invention sandwiches a stencil container that is stored in a stencil printing machine so that it can be pulled out and has an open upper surface, and a stencil sheet that is wound around a printing plate cylinder and used for printing. In a stencil discharging apparatus of a stencil printing machine comprising a pair of upper and lower drawing rollers that are drawn into a stencil container, an end of the stencil container on the side of the stencil roller is engaged with the stencil sheet immediately after passing the stencil roller from below. An upward scraping claw that can be joined, and a strip-like or bar-like shape that extends in the width direction of the stencil container and suppresses a part of the stencil sheet in the stencil container from above from the upper surface opening portion of the stencil container A pressing member is disposed, and the pressing member is connected to an arm supported by the plate discharging container so as to be swingable in the vertical direction, and is configured to move up and down when the arm swings.

In addition to the above configuration, the present invention can also include the following configuration.
(A) The pressing member and the arm are formed as a single piece by the same member.

(B) The pressing member can be lowered by its own weight, and is locked at a predetermined position by a stopper portion formed on the plate discharging container.

(C) A plurality of downward protrusions are formed on the pressing member at intervals in the width direction of the discharge container.

(D) The arms are disposed on both side walls of the plate discharging container.

(E) The pressing member is disposed at a position near the drawing roller side of the plate discharging container.

(F) An elevating mechanism is provided that raises the end portion on the scraping claw side of the discharged plate container by an operation of pulling out the discharged plate container from the stencil printing machine.

  According to the present invention, even if the end portion of the last stencil sheet discharged into the discharge container is sandwiched between the pull-in rollers or attached to the pull-in roller with ink, When pulling out the stencil from the housing of the stencil printing machine, it can be peeled off from the drawing roller by the scraping claw, and the stencil sheet stored in the stencil container can be reliably prevented from protruding upward by the pressing member. It is possible to prevent the stencil sheet from remaining inside.

  If the pressing member and the arm are integrally formed as in the configuration (a), the manufacturing is easy and the number of parts can be reduced.

  As in the configuration (b), if the pressing member can be lowered by its own weight, a part of the stencil sheet can be pressed with a constant pressure without providing a special urging means. When the paper is turned upside down and thrown into the trash, the holding member opens naturally by its own weight, so that all the stencil paper can be easily thrown away without leaving it.

  As in the configuration (c), when the pressing member is formed with a plurality of downward protrusions at intervals in the width direction of the plate discharging container, when the discharging plate container is pulled out, the protrusions bite into the stencil sheet, The stencil sheet can be prevented from slipping out of the waste container.

  If the arm is provided on both side walls of the plate discharging container as in the configuration (d), the pressing member can be supported in a stable state so as to be movable up and down.

  As in the configuration (e), when the pressing member is arranged at a position closer to the drawing roller side of the plate discharging container, it is easy to escape above the plate discharging container by a scraping claw immediately after being pulled out into the plate discharging container. The stencil sheet thus obtained can be confined in a reliable stencil container.

As in the configuration (f), when the platen container is provided with a lifting mechanism that raises the end portion on the scraping nail side of the platen container by the operation of pulling out the platen container from the stencil printing machine, The base paper bites in and the last stencil base paper can be reliably peeled off from the drawing roller.

1 is a schematic vertical side view of a stencil printing machine equipped with a plate discharging apparatus according to the present invention. FIG. 2 is an enlarged longitudinal sectional side view of the plate discharging apparatus of FIG. 1. It is the perspective view which looked at the discharging container of the discharging apparatus of FIG. 1 from front diagonally upward. FIG. 4 is an enlarged vertical side view similar to FIG. 3, showing a state in the middle of pulling out the plate discharging container.

(Overview of the entire stencil printing machine)
1 to 4 show a stencil printing machine equipped with a plate removing apparatus according to the present invention, and an embodiment of the present invention will be described based on these drawings. FIG. 1 shows a longitudinal side view of the entire stencil printing machine. For convenience of explanation, the upstream side in the transport direction M of the printing paper P is defined as “front side”, and the downstream side in the transport direction M is defined as “rear side”. ,explain.

  In FIG. 1, a paper feeding device 2 is disposed at the front lower portion of the printing press main body 1, and a paper discharge device 3 is disposed at the rear lower portion of the printing press main body 1. A printing unit 4 is arranged, a plate making device 5 is arranged at the front upper part of the printing machine main body 1, and a plate discharging device 7 is arranged at the rear upper part of the printing machine main body 1. An image reading device 9 is disposed on the upper side of the printing machine main body 1.

  The printing unit 4 includes a cylindrical printing plate cylinder 11 on which a pre-made stencil sheet N is mounted on an outer peripheral surface, and a pressing roller 12 that abuts and separates from the printing plate cylinder 11 from below. In the printing plate cylinder 11, an ink supply mechanism having an ink roller 11a is incorporated. That is, the printing paper P is sandwiched between the rotating printing cylinder 11 and the pressing roller 12 and conveyed in the conveying direction M, and the image of the stencil sheet N is printed by the ink supplied from the printing plate cylinder 11. Transfer (print) on the upper surface of the printing paper P.

  The sheet feeding device 2 includes a sheet feeding table 21, a sheet feeding roller 22 and a separating member 23 arranged at the rear end of the sheet feeding table 21, and a pair of timing rollers 24 arranged behind the sheet feeding roller 22. And. That is, the timing roller 24 performs printing so that the printing paper P stacked on the paper feed tray 21 can be taken out one by one from the top by the paper feeding roller 22 and the separating member 23 and printed at a predetermined position on the printing paper P. The printing cylinder P is operated at an appropriate timing in synchronization with the rotation of the printing cylinder 11 to feed the printing paper P into the printing unit A of the printing unit 4.

  The paper discharge device 3 includes an air suction type transport belt mechanism 31 and a paper receiving tray 32, and transports the printing paper P printed by the printing unit 4 backward while air is sucked by the transport belt mechanism 31. Then, it is discharged onto the paper tray 32.

  The plate making apparatus 5 includes a stencil sheet roll 35, a thermal head 37, and a platen roller 36 that comes into contact with the thermal head 37, and based on image data read by the image reading device 9, the stencil sheet roll 35. Is made with the thermal head 37, and the stencil sheet N after the plate making is mounted on the outer peripheral surface of the printing plate cylinder 11 of the printing unit 4.

(Configuration of plate removal device)
The plate discharging device 7 includes a plate discharging housing 41 attached in the printing machine main body 1, a pair of upper and lower drawing rollers 42 attached to the front upper end of the housing 41, and is slidable from the rear in the housing 41. And a plate-opening container 43 having an open top surface inserted into the container.

  The drawing roller 42 is located at a position corresponding to the rear upper end portion of the printing plate cylinder 11, and holds the front end portion of the stencil sheet N after printing mounted on the outer peripheral surface of the printing plate cylinder 11. And it is comprised so that it may draw in in the waste-plate container 43 of the housing 41 by rotating.

  FIG. 2 is an enlarged vertical side view of the plate discharging device 7 in a state in which the plate discharging container 43 is accommodated. In FIG. 2, the housing 41 includes a pair of side plates 50 arranged at intervals in the left-right direction, and both side plates. The bottom plate 51 that connects the lower end portions of the 50 and the ceiling plate 52 that connects the upper end portions of the side plates 50 are formed in a substantially rectangular parallelepiped shape, and the front surface and the rear surface are open. On the bottom plate 51, a plate discharge container 43 is slidably supported.

  The upper drawing roller 42 is connected to a drive motor (not shown) via a belt transmission mechanism (not shown), and rotates in the direction of arrow R1. The lower drawing roller 42 is in pressure contact with the upper drawing roller 42 by a spring (not shown), so that the upper drawing roller 42 is driven to rotate in the direction of the arrow R2 as the upper drawing roller 42 rotates in the direction of the arrow R1. It has become. That is, the used stencil sheet N is sandwiched between the upper and lower drawing rollers 42 and 42 and rotated in the directions R1 and R2, respectively, so that the stencil sheet N is drawn into the housing 41.

  FIG. 3 is a perspective view of the discharge plate container 43 as viewed obliquely from above. In FIG. 3, the discharge plate container 43 includes a pair of side walls 60 arranged at intervals in the left-right direction and lower end portions of both side walls 60. A bottom wall 61 that joins between the front walls 62, a front wall 62 that joins between the front ends of both side walls 60, and a rear wall 63 that joins between the rear ends of both side walls 60 are formed in a square box shape, and the entire top surface is Open (open). The side wall 60, the bottom wall 61, the front wall 62, and the rear wall 63 are integrally formed of a resin member. The front wall 62 is formed lower than the rear wall 63 in order to secure a space for the drawing roller arrangement. The upper portion of the plate discharging container 43 is covered with a ceiling plate 52 of the housing 41 at a certain interval in the housed state as shown in FIG. Further, a handle 75 protruding rearward is integrally formed on the rear wall 63 of the plate discharging container 43.

(Scraping mechanism for preventing residual stencil paper)
In FIG. 2, in order to prevent the stencil sheet N from remaining on the drawing rollers 42, 42, a plurality of scraping claws 64 projecting forward and upward are integrated with the front wall 62 at the upper end portion of the front wall 62 of the discharge container 43. Is formed.

  Each scraping claw 64 extends so that the tip thereof is directed slightly below the nip portion 42b of the pull-in rollers 42, whereby the stencil sheet N fed rearward from the nip portion 42b of the pull-in roller 42 is It passes over each scraping claw 64 and is discharged into the plate discharge container 43.

  In FIG. 3, one scraping claw 64 is disposed at a substantially central position of the left and right widths, and two scraping claws 64 are disposed at left and right positions spaced substantially evenly from the central position to the left and right. Further, auxiliary claws 64 a shorter than the scraping claws 64 are formed near the left and right ends of the front wall 62.

(Mechanism to suppress stencil paper from above)
In FIG. 3, as a mechanism for pressing and suppressing the stencil sheet N stored in the discharging plate container 43 from above, a metal pressing member 66 extending elongated across the entire width in the left-right direction of the discharging plate container 43 is the same as the pressing member 66. And a pair of left and right arms 67 integrally formed of a material. The front end portion of each arm 67 is integrally coupled to the left and right end portions of the pressing member 66, each arm 67 extends rearward and downward from the left and right end portions of the pressing member 66, and the rear end portion of each arm 67 is The platen 42 is supported by a swing shaft (bolt) 68 so as to be swingable in the vertical direction. Each side wall 60 is formed with a vertically long shaft support hole 69 having an open upper end, and the swing shafts 68 are inserted into the shaft support hole 69 from above. The holding member 66 is formed with a plurality of square-shaped protrusions 66a facing downward in the left-right direction.

  In addition, a plurality of (three) ribs 73 extending in the vertical direction are formed in the front half of both side walls 60, and these ribs 73 serve as stoppers for the pressing member 66. By lowering under its own weight and locking each arm 67 to the upper end of each rib 73, the pressing member 66 is at the position shown in FIGS. It is maintained at a position near the rear of the drawing roller 42.

(Raising guide mechanism of the plate discharge container 43)
In FIG. 2, the front end portion (that is, the scraping claw 64) of the plate discharging container 43 is disposed on the plate discharging container 43 and the housing 41 so that the scraping claw 64 can effectively perform the scraping operation of the base paper. A raising guide mechanism for raising is provided. That is, as a rising guide mechanism, a downward guide projection 65 is formed on the lower surface of the front end portion of the bottom wall 61 of the plate discharging container 43, while the guide of the plate discharging container 43 in the stored state is formed on the front end portion of the bottom plate 51 of the housing 41. A guide hole 70 into which the protrusion 65 is fitted is formed. The guide protrusion 65 has a rear end edge 65a that is tilted backward (backward tilted), and the rear end edge of the guide hole 70 corresponds to the rear end edge 65a that tilts backward of the guide protrusion 65. The inclined guide piece 70a is bent. Further, an inclined portion 71 is formed at the rear end portion of the bottom plate 51 of the housing 41 so as to incline rearward with respect to the horizontal. When the front end portion of the plate discharge container 43 rises as shown in FIG. The lower surface of the rear end portion of 43 can be inclined downward.

(Function)
The printing method by the stencil printing machine has already been described in each device explanation part, and since it is a well-known content, it is omitted here, and the procedure for making the stencil sheet N, discharging the plate, and discarding will be described.

  In FIG. 1, the stencil printing machine 5 performs piercing stencil roll 35 with a thermal head 36 based on the original image data read by the image reading device 9 or based on the data read by another device. The base paper N is made and the stencil base paper N is mounted on the outer peripheral surface of the printing unit 11.

  After the image of the stencil sheet N mounted on the printing plate cylinder 11 is printed on a predetermined number of printing sheets P, it is replaced with a new stencil sheet N in order to print the next image. When exchanging, first, the printing plate cylinder 11 is stopped at a predetermined discharging plate rotation angle, and the starting end portion of the used stencil sheet N is peeled off from the printing plate cylinder 11, and the discharging device 7 is discharged by an appropriate guide device. Then, the printing plate cylinder 11 and the drawing roller 42 are simultaneously rotated, and the used stencil sheet N is taken into the plate discharging container 43 of the plate discharging housing 41.

  After the plate removal operation, a new stencil sheet N made by the plate making apparatus 5 is mounted on the printing plate cylinder 11, the next image is printed, and after the printing of a predetermined number of printing sheets P is completed, the same as described above. In addition, the used stencil sheet N is taken into the discharge container 43 by the drawing roller 42.

  When used stencil sheets N are stored one after another in the discharge container 43 and the discharge container 43 is almost full, the discharge container 43 is pulled out from the housing 41 with the handle 75 and used in the discharge container 43. The stencil sheet N is discarded in a trash can.

  FIG. 2 shows a state before the discharged plate container 43 is pulled out from the housing 41, and shows a state in which the used stencil sheet N is taken into the discharged plate container 43, and FIG. 4 shows a state where the full discharged plate container 43 is started to be pulled out. Is shown. As shown in FIG. 2, the stencil sheet N drawn by the drawing roller 42 passes above the scraping claw 64 and then passes below the pressing member 66 and is stored in the plate discharging container 43. At this time, when the stencil sheet N passes so as to swell upward, the stencil sheet N is suppressed downward by the pressing member 66 and is stored in the discharge plate container 43 without protruding from the discharge plate container 43.

  When the stencil sheet N is stored one after another and the inside of the stencil sheet 43 becomes full and the stencil sheet N is discarded from the stencil sheet container 43, the stencil sheet container 43 is first pulled out from the state of FIG. The bottom wall 61 of the plate discharging container 43 starts to slide backward on the bottom plate 51 of the housing 41. As shown in FIG. 4, the rear end edge 65a of the guide projection 65 abuts on the guide piece 70a and is pushed upward. As a result, the front end portion of the discharge plate container 43 and the scraping claw 64 rise. At this time, since both the rear end edge 65a of the guide protrusion 65 and the guide piece 70a are formed in a backward inclined posture, the guide protrusion 65 and the front end portion of the plate discharge container 43 rise smoothly.

  Even if the end portion of the last stencil sheet N is sandwiched between the nip portions 42 b of the drawing roller 42, the scraping claw 64 rises, so that the scraping claw 64 is positioned immediately after the drawing roller 42. The end of the stencil sheet N is hooked, the end of the stencil sheet N is pulled rearward, and peeled back from the drawing roller 42.

  Moreover, since the stencil sheet N is prevented from bulging upward by the pressing member 66 at the position behind the scraping claw 64, the stencil sheet N does not protrude upward from the stencil container 43, and the stencil sheet N is placed in the housing 41. Is removed together with the discharge plate container 43 without remaining.

  After the drawing, the stencil sheet N is released from the stencil container 43 by turning the stencil container 43 downward. However, when the stencil container 43 is downward, the pressing member 66 is automatically opened downward by its own weight. Therefore, the stencil sheet N is discharged from the discharge plate container 43 without any support. Further, since the pressing member 66 is a band plate-shaped or bar-shaped member, the stencil sheet N is difficult to adhere to the pressing member 66, so that it is not difficult to discharge from the discharge plate container 43.

  After the stencil sheet N is discarded, when the empty stencil container 43 is returned from the downward state to the original state, the pressing member 66 automatically returns to the state shown in FIG. In this state, it is inserted into the housing 41 again.

[Other Embodiments of Invention]
(1) In the above embodiment, the pressing member 66 is formed with a plurality of downward quadrangular protrusions 66a. The protrusion 66a has various shapes such as a triangular shape or a semicircular shape. be able to. It is also possible to make the shape without the protrusion 66a.

(2) In the above embodiment, the belt plate-like pressing member 66 and a pair of arms 67 formed integrally therewith are provided. As the pressing member 66, a rod having a circular cross section or a square cross section is used. Further, it can be structured to be fixed to the pair of arms 67.

(3) Although five scraping claws 64 are provided in the above-described embodiment, two, three, four, or six or more scraping claws 64 can be provided. However, it is preferable to provide three or more stencil sheets in order to surely scrape out.

(4) In the embodiment, the position of the pressing member 66 in the front-rear direction is the position near the upper rear side of the scraping claw at the front end portion. Is possible. However, as in the above-described embodiment, the arrangement arranged immediately after the scraping claw 64 is optimal for preventing the stencil sheet N from protruding upward.

(5) In the above-described embodiment, the pressing member 66 is made of metal. However, it is sufficient that the stencil sheet stored in the discharging plate container 43 can be prevented from bulging upward by its own weight, and preferably the pressing member. 66 should just have the weight of 50g-300g, and materials other than a metal, for example, resin, may be sufficient.

DESCRIPTION OF SYMBOLS 1 Printing machine main body 7 Plate discharging apparatus 11 Printing plate cylinder 41 Housing for discharging plate 42 Pull-in roller 43 Plate discharging container 64 Scraping claw 66 Holding member 66a Protrusion 67 Arm 68 Oscillating shaft (bolt)
N Stencil paper

Claims (7)

A stencil container that can be pulled out in the stencil printing machine and has an open upper surface; and a pair of upper and lower drawing rollers that sandwich the stencil sheet that has been wound around a printing plate cylinder and used for printing and that is drawn into the stencil container In the stencil machine of the stencil printing machine, comprising:
An upward scraping claw that can be engaged with the stencil sheet immediately after passing through the drawing roller is formed at the end of the discharging container on the drawing roller side, from below.
A strip-shaped or bar-shaped pressing member that extends in the width direction of the plate discharging container and can suppress a part of the stencil sheet in the plate discharging container from above is disposed on the upper surface opening portion of the plate discharging container,
The pressing member is connected to an arm supported by the plate discharging container so as to be swingable in the vertical direction, and is configured to move up and down by swinging the arm.   The stencil discharging machine of a stencil printing machine according to claim 1, wherein the pressing member and the arm are integrally formed of the same member.   The stencil discharging apparatus of a stencil printing machine according to claim 1 or 2, wherein the pressing member can be lowered by its own weight and is locked at a predetermined position by a stopper portion formed on the stencil discharging container.   The stencil discharging apparatus of a stencil printing machine according to any one of claims 1 to 3, wherein the pressing member is formed with a plurality of downward projections at intervals in the width direction of the stencil discharging container.   The stencil discharging apparatus of a stencil printing machine according to any one of claims 1 to 4, wherein the arm is disposed on both side walls of the stencil discharging container.   The stencil printing machine discharging apparatus according to any one of claims 1 to 5, wherein the pressing member is disposed at a position of the discharging container closer to the drawing roller.   The stencil printing machine according to any one of claims 1 to 6, further comprising an ascending mechanism that raises an end portion on the scraping claw side of the stencil discharge container by an operation of pulling out the stencil discharge container from the stencil printing machine. Plate removal equipment.

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