JPS60224573A - Rotary press with plate-dismounting device - Google Patents

Abstract

PURPOSE:To facilitate a leading end part of a stencil detached from a form cylinder to be securely fed to a roller pair in a plate-dismounting device, by providing a stencil guide member in proximity to the outer peripheral surface of a form cylinder at a part ranging from a part opposed to a stencil-fastening part of the form cylinder located at a plate-dismounting position to the roller pair. CONSTITUTION:A stencil paper S disposed between a movable exposure base 12 and a pressure plate 13 is supplied from a stencil paper storing part 28 provided under an original mount base 27. In a plate-dismounting operation for detaching the stencil S from the form cylinder 1, fastening of an end part of the stencil S by a stencil-fastening device 2 is released. A stencil-releasing pawl 32 is located at a releasing position, the form cylinder 1 is rotated clockwise, and the stencil S fitted to the outer peripheral surface of the form cylinder 1 is released from the cylinder 1, starting from the one end part thereof, by the pawl 32 as the cylinder 1 is rotated. The stencil S thus released is guided by a tip part of the pawl 32 to a position between a metallic roller 36 and a rubber roller 37, and is guided into a discarding box 33 to be discarded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a rotary printing apparatus with a plate discharging device, and more particularly to a plate discharging device for discarding relatively thin used base paper such as stencil printing base paper. This relates to a rotary printing device.

BACKGROUND OF THE INVENTION In order to automate plate discharging in a rotary printing device, a plate discharging device is already known that peels off relatively thin used base paper, such as stencil printing base paper, from a plate cylinder and automatically disposes of it. , this keyaki plate discharging device was filed in Utility Application No. 54-179595 (Utility Model Application No. 56-958) filed by the same applicant as the present applicant.
68 month), Jōgan No. 179596 (Sho 56-
95869), 1982-97030 yen
No. 8-3266), and a fully automatic rotary stencil printing machine equipped with this type of plate discharge device was proposed in Japanese Patent Application No. 1983-2072 by the same applicant as the present applicant.
It has already been proposed in No. 16.

The above-mentioned plate discharging device is equipped with a pair of rollers that pinch the base paper peeled off from the plate cylinder and transport the base paper to a disposal box. If the paper sheet does not reach the pair of rollers, the pair of rollers will not carry out the discard conveyance of the base paper, and normal discharge will not occur.

In a conventional rotary printing apparatus having the above-described plate discharge device, the portion extending from the original paper locking portion of the plate cylinder at the plate discharge position to the O-L pair of the plate discharge device is an open space. Therefore, when the locked end of the base paper released from the locked state at the base paper locking portion bends in the direction away from the outer peripheral surface of the plate cylinder and rolls, the curl of the base paper is suppressed. 1. In this case, the locked end of the base paper, that is, the leading end, may not be fed into the pair of rollers of the plate discharging device.
Print ejection failure occurs.

Purpose of the Invention The present invention has been made in view of the above-mentioned problems in the conventional plate ejection '@floor rotary printing device, and has been made to improve the method so that the leading edge of the base paper removed from the plate cylinder is reliably fed into the pair of rollers of the plate ejection device. The purpose is to provide a KiF for rotary printing of printed plates.

DESCRIPTION OF THE INVENTION According to the present invention, the above-mentioned object is to provide a rotary printing apparatus having a plate discharging device equipped with an O-R pair that pinches the base paper removed from the plate cylinder and transports the base paper for disposal. A rotary press with a plate discharge device, in which a paper guide member is provided close to the outer circumferential surface of the plate cylinder at a portion extending from a portion opposite to a part of the plate cylinder 11 at the plate discharge position to the pair of rollers. This is accomplished by a printing device.

Effects of the Invention According to the above-described configuration, when the master is discharged, the retained end of the base paper released from the retained state in the base paper retaining portion warps and curls in the direction away from the outer circumferential surface of the discharged master. However, the paper guide member prevents it from becoming large, and the paper guide member guides the leading edge of the paper from the paper locking portion toward the pair of rollers. As a result, the leading edge of the removed base paper is reliably fed to the pair of rollers, and the waste conveyance of the base paper by the pair of rollers is reliably performed.

DESCRIPTION OF EMBODIMENTS The present invention will now be described in detail with reference to embodiments with reference to the accompanying drawings.

FIGS. 1 and 2 show the main parts of an embodiment of a rotary printing apparatus with a plate discharge device according to the present invention. In the figure, reference numeral 1 indicates a plate cylinder, which is composed of a cylindrical body with a porous structure that allows ink to pass through. The original paper locking device 2 is rotated by an electric motor (not shown) around its own central axis in the direction a>fi+ in the figure. On the outer peripheral surface of the plate cylinder 1, a stencil printing paper S whose one end is attached to the plate cylinder 1 by a paper lock 12 is wound around the plate cylinder 1 due to the viscosity of the printing ink.

The base paper locking device 2 has two magnet plates 4 and 5 fixed to a seat 3 for attaching the base paper provided on the outer circumferential surface of the plate cylinder 1, and a pivot 6 for attaching the base paper to the seat 3. It has a supported clamp plate 7 made of a thin metal plate, and when the clamp plate 7 is magnetically attracted to the magnetic plate 4, one end of the stencil printing base paper S is clamped by the clamp plate 7 and the magnetic plate 4. This is then connected to plate cylinder 1. Clamp plate 7
As shown in the figure, the clamp position is magnetically attracted to the magnetic plate 4, and as shown by the imaginary line in the figure, the 5-lamp position is magnetically attracted to the other magnetic plate 5. During this time, it is rotated by a drive device (not shown), and the base paper is automatically locked and released.

If a more detailed explanation of this paper locking device is required, please refer to the patent application filed in 1973 by the same applicant as the present applicant.
Please refer to the patent specification and drawings of No. 7-207217.

An ink supply device including a squeegee roller 8, a doctor rod 9, and an ink supply pipe 10 is provided in the plate cylinder 1, and the ink supply device supplies ink to the inner peripheral surface of the plate cylinder 1 in accordance with the rotation of the plate cylinder 1. It is designed to supply printing ink.

A part that holds the plate WA1 and faces the squeegee roller 3,
That is, a press roller 11 is provided below the plate cylinder 1, and the press roller presses a printing paper (not shown) onto the outer peripheral surface of the plate rI41 with a counterclockwise direction, and works together with the plate cylinder 1. Stencil printing is now available.

A plate making device and a base paper supply device are provided on one side of the plate cylinder 1. The plate-making apparatus has a movable exposure table 126- and a fixed suppression plate 13, and the movable exposure table 12 is pulled from the pressure plate 19 and pressed against the pressure plate 13 by the drive unit W114 as shown in the figure. It is designed to be reciprocated in the vertical direction as shown in the figure between the two positions.

A movable cutter 20 such as a paper guide rod 15, a pair of paper feed rollers 1G, and paper feed guide plates 18 and 19 is provided between the movable exposure table 12 and the plate 111, and the movable cutter 20 is not shown in the figure. As shown in the figure, the base paper is disposed in a position very close to the base paper locking device 2 of the plate W41 at the plate loading/discharging position, and is reciprocated by the cam 21 in the vertical direction as shown in the figure, thereby serving as a fixed cutter. It works together with the feed guide plate 19 to cut the stencil printing base paper S.

On the side of the plate WA1 of the movable exposure table 12, there is a document discharge path 2 defined by document guide plates 22 and 23 arranged at an angle.
4 is #Q+J. The document ejection passage 24 extends diagonally upward from near one edge of the sales I41 side of the movable exposure f-312, and in the middle thereof is a document drop prevention claw 26 that is pivotally supported by a pivot shaft 25. but! ! Q1 has been awarded. The document fall prevention claw 26 is configured to freely allow the document to move upward in the document discharge path 24 and to prevent the document from descending in the document discharge path 24.

A stencil printing paper S is arranged between the movable exposure table 12 and the pressing plate 13, and this stencil printing stencil paper is stored in the stencil paper roll 2 in the stencil storage section 28 provided below the original loading table 27.
It is now supplied from 9.

A plate discharge device 30 is provided on the opposite side of the plate W41 from the plate making device. The plate discharge device w130 includes a pair of rollers 31, a base paper stripping claw 32, and a base paper disposal box 33.

The roller pair 31 is provided at the entrance of the paper waste box 33 parallel to the axis of the plate cylinder 1, and includes a metal roller 36 and a rubber roller supported by a lower rotating shaft 34 and an upper rotating shaft 35 that are parallel to each other and engage with each other. 37, and the metal roller 36 is rotated by an electric motor 38 in a direction around the hour g1 in the figure. As shown in the figure, the roller pair 31 is provided at a position opposite to the movable cutter 20 and very close to the original paper locking device 2 of the plate 11i1 at the plate loading/discharging position.

The base paper waste box 33 is provided with a base paper guide plate 39 extending from the entrance thereof toward a position above the base paper locking device [12] of the plate cylinder 1 located at the plate loading/discharging position. The base paper guide plates 39 are provided on the inner and outer sides of the clamp plate 7 so as not to obstruct the rotation of the clamp plate 7. Of the two document guide plates 39, the one on the side where the original paper detector 40 is provided is shorter than the one on the other side. Base paper detector 4
0 is supported from a side plate 42 by a bracket 41, and a base paper guide plate 43 is attached to the base paper detector parallel to the base paper guide plate 39.

Further, in the illustrated embodiment, the movable cutter 20 is provided with a base paper locking device 2 of the plate cylinder 1, which is located at the discharge plate printing position from the movable cutter 20.
A base paper guide plate 44 is attached that extends toward an upper position. The base paper guide plates 39, 43 and 44 are all provided close to the outer circumferential surface of the plate 11i11, and their lower bottom surfaces and inner surfaces of the plate 111 are substantially flush with each other. In cooperation with the outer peripheral surface of the plate cylinder 1, a non-open paper path is defined from the movable cutter 20 to the roller pair 31. The base paper guide plates 39, 43, and 471 are all provided relatively close to the inner and outer ends of the clamp plate so as to face the stencil printing base paper S without blocking the rotation of the clamp plate 7.

The base paper stripping claw 32 has its base end pivotally supported by a pivot 45 and is drivingly connected to a plunger 47 of a solenoid device [46], and as shown in the figure, the base paper stripping claw 32 moves from the base paper stripping position to the base paper peeling position around the pivot 45. It is designed to be rotated between the retracted position, which is rotated clockwise in the figure.

When the stencil printing base paper S, which is wrapped around the outer peripheral surface of the plate 11i1, is removed from the plate cylinder 1, one end of the stencil printing base paper S is released from the base paper locking device 2, and the base paper is peeled off. The stripping claw 32 is located at the stripping position as shown in FIG. 1, and in this state, the plate cylinder 1 is rotated clockwise as viewed in FIG. 1, thereby performing stripping. This allows @W
The stencil printing base paper S attached to the outer periphery 10- of 41 is stripped from the plate cylinder 1 from one end by the base paper stripping claw 32 as the plate cylinder 1 rotates, and the tip of the stripping claw 12 The metal roller 36 enters between the metal roller 36 and the rubber roller 37, and the metal roller 36 rotates in the clockwise direction as seen in FIG. As it rotates, it is held between the two rollers and transported to the waste box 33 for disposal.

During plate discharge as described above, when the stencil printing base paper S is released from the base paper retaining device 2, the retained end portion of the stencil printing base paper S is released from the plate cylinder 1.
The paper guide plates 39, 43 and 44 may curl in a direction away from the outer peripheral surface of the paper.
Because it is regulated by 1blj, it does not become large,
Further, as the plate cylinder 1 rotates, these paper guide plates move the already released IL end of the stencil printing paper to the roller pair 31.
I started to guide him in order to send him in the opposite direction. J to this
, the end of the stencil printing paper which has been released from the lock is reliably fed into the []-ra pair 31, and is reliably conveyed to the waste box 33 by the roller pair, The occurrence of plate ejection defects is avoided.

In addition, the above-mentioned base paper guide plate, especially the base paper guide plate 44 on the side of the movable cutter 20, is used to guide the new stencil printing base paper S to plate 1F1.
1, the tip is guided to be fed between the permanent magnet plate 4 and the clamp plate 7 of the original paper locking device 2, and this also contributes to improving the reliability of printing.

In the above-described embodiment, the base paper guide plate is constructed of separate members on the plate loading side and the plate discharge side, but it may be constructed as one continuous member.

Although the present invention has been described in detail with respect to specific embodiments above, the present invention is not limited thereto.
It will be apparent to those skilled in the art that other embodiments are possible within the scope of the invention.

[Brief explanation of drawings]

Figure 1 is a schematic longitudinal cross-sectional view showing the main parts of one embodiment of a rotary printing device with a plate discharging device according to the present invention;
1 is a plan view showing a wandering plate plate structure of the rotary printing apparatus with a plate discharge device according to the present invention shown in FIG. 1. FIG. DESCRIPTION OF SYMBOLS 1... Plate cylinder, 2... Base paper locking device, 3... Base paper attachment number seat, 4.5... Magnet plate, 6... Pivot, 7...
...Clamp plate, 8...Squeegee 0-ra, 9...
doctor rod. 10... Ink supply pipe, 11... Press roller. 12...Movable exposure table, 13...Press plate, 14...
Drive device, 15... Base paper guide 0, 16... Base paper feed roller pair, 18.19... Base paper feed guide plate, 20
...Movable cutter, 21...Cam, 22.23...
Manuscript guide board. 24... Original 81 paper discharge passage, 25... Axis, 26...
・Document fall prevention claw, 27...Document placement table, 28...
Original paper storage section. 29... Base paper roller, 30... Master discharge device, 31...
- Roller pair, 32... Base paper stripping claw, 33... Base paper disposal box. 34... Lower rotation shaft, 35... Upper rotation shaft, 36.
・・Metal roller, 36... Gold j [0-ra, 37...
rubber roller. 38... Electric motor, 39... Original paper guide plate, 40...
Base paper detector, 41...Bracket, 42...Side plate,
43.44...Base paper guide board, 45...Axis, 46.
··solenoid. -13= 47... Plunger patent applicant Riso H Gaku Kogyo Co., Ltd. Agent Patent attorney Akashi 8 Tsuyoshi 14-

Claims (1)

[Claims] In a rotary printing device having a plate discharging device equipped with a pair of rollers that pinch the base paper removed from the plate cylinder and transport the base paper for disposal, the above-mentioned from the part J corresponding to the base paper locking part of the plate cylinder at the plate discharge position. 1. A rotary printing device with a wandering plate mounting, characterized in that a base paper guide member is provided close to the outer circumferential portion of the plate cylinder in a portion leading to the roller pair.