JPH0446234B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention relates to a plate-making and printing device that is equipped with a plate-making means and a printing means. It is equipped with a cutter for cutting the base paper.

(b) Conventional technology As a conventional plate-making printing device, for example,
There is one described in the -96983 publication. For a while now, let's talk about this conventional device.
A brief explanation will be given according to the diagram.

In this figure, 101 is a plate making machine, and this plate making machine 101 is a pressed member 1 provided above.
02, a transparent glass plate 105 that presses the pressed member 102 from below with the base paper 103 and the original 104 superimposed, a flash lamp 106 attached to the transparent glass plate 105, and the transparent glass plate 105 and a pressure device 107 that pushes up the flash lamp 106 integrally. On the downstream side of the transparent glass plate 105, the base paper 1 separated from the original 104 after plate making is placed.
A first pair of conveying rollers 108, 10 that conveys 03
9 is provided, and this first conveying roller pair 108,
A cutter consisting of a fixed blade 110 and a rotary blade 111 is provided downstream of the blade 109.

Further, on the downstream side of the cutters 110 and 111, a guide 1 is provided for conveying the downstream edge of the base paper 103 toward the clamper 113 of the plate cylinder 112.
14 and a second pair of transport rollers 115, 116 are provided.

Note that in this apparatus, the original image is intermittently made on the base paper 103 by the plate-making machine 101, and the base paper 103 is conveyed in synchronization with this plate-making operation.
The conveyance direction dimension L10 of the area to be plate-made at one time on the base paper 103 and the distance from the cutters 110, 111 to the clamper 1.
13 so that the distance L20 is the same, i.e.
Each dimension is set so that the relationship L10=L20 holds.

Therefore, if the length of L10 is set to be long in order to improve the plate-making efficiency, the length of L20 will also be lengthened accordingly.

By the way, since the material of the base paper 103 is extremely flexible, the downstream edge of the base paper 103 after being cut by the cutters 110 and 111 hangs down, making it impossible to transport the base paper 103 only by the pair of transport rollers 108 and 109. First, as described above, the clamper 113 is
It has been transported to.

(c) Problems to be solved by the invention As mentioned above, in the conventional technology, in order to convey the downstream edge of the base paper to the clamper of the plate cylinder,
Since a pair of conveying rollers and a guide are installed up to the downstream side of the cutter, the structure is complicated and reliability is low.

The present invention has been made in view of the problems of the prior art, and is intended to simplify the structure and improve reliability.

(d) Means for Solving the Problems The present invention provides a method for attaching the stencil paper to the upstream side of the portion of the printing cylinder where the downstream end edge is attached along the direction of transport of the stencil paper. Cutters for cutting in orthogonal directions are arranged adjacent to each other, and a guide is provided on the downstream side of the cutter to guide a stencil paper different from the stencil paper toward the plate cylinder from the outside. A stencil printing device characterized in that no stencil conveying means is provided between the cutters.

(E) Effect In the present invention, since the cutter is provided near the plate cylinder, the distance from the cutter to the plate cylinder is short.
Even if no base paper conveying means such as a pair of rollers or a guide is interposed between the plate cylinder and the cutter, the downstream edge of the base paper is reliably conveyed to the clamper.

In addition, since a guide is provided downstream of the cutter to guide stencil paper different from the stencil paper toward the plate cylinder, the stencil paper made with another plate making machine can be guided to the plate cylinder by the guide. It can be guided and installed.

(F) Embodiment Figures 1 to 4 all show one embodiment of the present invention, with Figure 1 being an external perspective view, Figure 2 being a configuration diagram showing an outline of the internal structure, and Figure 3 being a configuration diagram showing an outline of the internal structure. 4 is a time chart for explaining the operation, and FIG. 4 is a partial plan view of the stencil sheet.

In FIGS. 1 and 2, an auxiliary document placement table 2 is provided at the upper left end of the main body 1 of the apparatus.
This document placement auxiliary table 2 is rotatably attached to the main body 1 of the apparatus, and is configured to extend horizontally only when necessary, and to hang down when not necessary. Inside the part where the document placement auxiliary table 2 is installed, a roll of heat-sensitive stencil printing base paper 3 (hereinafter simply referred to as base paper) is mounted on a support shaft 4.
It is rotatably fitted into the A tension roller 5 having rotational resistance to apply tension to the base paper 3 when conveying the base paper 3 and a guide 6 to which the tension roller 5 is pressed are provided on the top of the roll-shaped base paper 3. There is. The base paper 3 used here is a conventionally known base paper on which a heat-sensitive film and a porous thin paper are laminated.

A plate-making machine 7 for forming a document image on the base paper 3 is arranged adjacent to the roll-shaped base paper 3 on the downstream side along the conveyance direction. This plate-making machine 7 mainly includes a holding member 8 that is attached to the upper surface of the apparatus main body 1 so as to be openable and closable, and a holding member 8 that is closed to the apparatus main body 1. A transparent glass plate 11 that presses from below a pressed plate 10 attached to the lower surface of 8, a flash lamp 12 installed below this transparent glass plate 11, and a transparent glass plate 11 and a flash lamp 1.
2 and a pressurizing device 19 for pressing the transparent glass plate 11 against the pressed plate 10. The holding member 8 is attached to the main body 1 of the apparatus via hinges 13, 13 provided on the rear side edge (see FIG. 1). Further, as described above, the pressed plate 10 is fixedly installed on the surface of the holding member 8 that comes into contact with the document 9, and near the free end, when the holding member 8 is closed on the apparatus main body 1, Locking means 14 for locking this,
14 is installed. Further, a back up roller 15 that presses both the original 9 and the base paper 3 against the upper surface of the guide 6 is rotatably mounted on the back surface of the holding member 8. It is being Photo sensors 17, 17 are arranged adjacent to each other to detect the flash timing marks 16 (see FIG. 4).

The transparent glass plate 11 and the flash lamp 12
is fixed to a chassis 18 having a U-shaped cross section, and as described above, this chassis 18 is configured to be movable up and down by a pressure device 19 provided at its lower part. A small lamp 20 for displaying the document position, which is always emitting light, is installed in the inner bottom of the downstream side of the chassis 18, and the light beam emitted from this small lamp 20 is transmitted to the inner wall of the chassis 18, and
The light travels straight between the outside of the reflection plate 21 of the flash lamp 12 and irradiates the transparent glass plate 11 in a linear manner. The downstream edge of the plate-making area is displayed by the light beam emitted from the small lamp 20. Since this display light beam can also pass through the original 9, it is also possible to control the plate-making position while the original 9 is placed on the transparent glass plate 11.

Further, a guide 22 for discharging the document is formed at the downstream end edge of the holding member 8. In addition,
The transport dimension L1 of the area to be plate-made at one time by the flash lamp 12 is set to about 6 cm.

On the downstream side of the plate-making machine 7, a base paper 3a after plate-making (hereinafter referred to as a base paper after plate-making) peeled off from the original 9 is placed.
Displayed at a. ), a first pair of conveying rollers 23, 24 and a second pair of conveying rollers 25, 26, which are in pressure contact with each other, are arranged in series. A driving force is applied to the second transport roller pair 25, 26 only when transporting the base paper 3a by itself, and when the base paper 3a is driven by other means, a constant resistance is applied to the second transport roller pair 25, 26. A one-way clutch is mounted on the rotating shaft so as to be driven with the rotational speed. In addition, both conveyor roller pairs 23, 24 and 25,
A micro switch 27 having an actuator is provided between the base paper 3a and the base paper 3a.

Below the first pair of transport rollers 23, 24 is a base paper 3a after plate making on which a document image is formed.
A storage chamber 28 is provided for temporarily storing the document 9, and a guide 29 is formed above the document 9, which is rotatable about the upper edge, for discharging the original 9 that has been peeled off from the base paper 3a. .

A cutter consisting of a rotary blade 30 and a fixed blade 31 is provided downstream of the second pair of transport rollers 25, 26, and the cutter 30, 31 allows the roll-shaped base paper 3a to be cut perpendicularly to its transport direction. It will be cut in the direction of Note that in this embodiment, the cutters 30, 31
In order to shorten the distance between the base paper 3a and a clamper 37 (described later), and to ensure smooth conveyance of the raw paper 3a after cutting, the raw paper 3a is moved between the cutters 30 and 31.
It is configured to be cut downstream of the

At the top of the cutters 30, 31, an insertion guide 32 into which a base paper 3 that has been previously cut to size and made by another plate-making machine is inserted extends toward a printing machine 33, which will be described later.

A printing machine 33 is installed downstream of the cutters 30 and 31.
This printing press 33 is equipped with a single plate cylinder 3.
4, a press roller 36 for pressing the printing paper 35 against the plate cylinder 34, and the like. A clamper 37 for holding the downstream edge of the base paper 3a and a printing ink injection port 38 are installed in the non-printing area of the plate cylinder 34. An overcenter spring (not shown) is attached to the clamper 37, and when the clamper 37 is pushed halfway down by a rotary cam 39 rotatably provided on the device body 1, the overcenter spring The base paper 3a is clamped at once by the resilient force of the plate 3a, and is released at once by a plate discharging machine 40, which will be described later. The structure of the plate cylinder 34 itself is the same as that conventionally known, so a description thereof will be omitted.
The clamper 37 and the cutters 30, 31 are as close as possible without interfering (L2 = approximately 3.5 cm),
No means for conveying the base paper 3a is provided between the two.

On the right side of the plate cylinder 34, the clamper 37 is released and the base paper 3b (hereinafter referred to as
The base paper after printing is completed is displayed at 3b. ) is provided with a plate discharger 40 for removing the plate from the plate cylinder 34. This plate discharging machine 40 includes a means (not shown) for opening the clamper 37 and a means for disengaging the base paper 3b from the plate cylinder 3.
4 and the peeled base paper 3
It consists of a pair of meshing gears 43 and 44 for storing the paper sheets b into the paper storage box 42, and the paper storage box 42 is horizontally mounted on the main body 1 of the apparatus.

At the lower right side of the device main body 1, there is paper 35 before printing.
A conventionally well-known paper feed tray 45 and paper feed roller 46 capable of stacking up to about 1000 sheets are provided, and the sheets are sequentially fed between the plate cylinder 34 and the press roller 36 starting from the topmost sheet 35. In addition, the device main body 1
A conveyor 47 for conveying the printed paper 35 and a paper discharge tray 48 for stacking and storing the discharged paper 35 are provided at the lower left side of the paper. 49 is a motor that drives the plate cylinder 34 and the like.

The apparatus of this embodiment is sequence-controlled by a microcomputer, and is configured so that the plate-making machine 7 and the printing machine 33 can operate simultaneously.

In addition, as mentioned above, the roll-shaped base paper 3 has
When forming an original image, flash timing marks 16 are attached at intervals corresponding to the length of the original image (first area) that can be formed with one light emission. This flash timing mark 16...
is printed on base paper 3 in advance,
It may be displayed as a through hole, and this through hole may be detected by a micro switch. It can also be formed by pasting small pieces of aluminum foil.

Next, the operation of the apparatus of this embodiment will be explained. Note that FIG. 2 shows the state at time P in FIG. 3 (time chart). The strip-shaped base paper 3 is pulled out from the roll in advance and transferred to the first pair of transport rollers 23, 24.
and a second conveying roller pair 25, 26, and the downstream edge thereof is connected to the double edge 3 of the cutter.
It is located between 0.31. At this time, the upstream side of the base paper 3 is stretched over the transparent glass plate 11 with the heat-sensitive film surface facing upward.

First, the operator opens the holding member 8 upward with the hinges 13, 13 as the center of rotation (see FIG. 1), and holds the original 9 with its plate-making surface facing downward. Superimpose it on the base paper 3. At this time, the downstream end edge of the plate-making area is displayed on the transparent glass plate 11 with light rays as described above. Note that marks A4 and B4 are formed on the upper surface of the guide 6 provided on the upstream side of the transparent glass plate 11 to indicate widthwise dimensions. (See Figure 1). Therefore, the operator uses the light beam or mark as a reference,
All that is necessary is to position the portion of the original 9 to be plated. When the holding member 8 is closed with the original 9 placed on the original paper 3, the holding member 8 is locked to the main body 1 of the apparatus by the locking means 14, and the original paper 3 and the original 9 are placed on the backing up. Prora 1
5 and is pressed onto the guide 6.

Thereafter, when a start switch (not shown) is operated, the pressurizing device 19 of the plate-making machine 7 is activated, and the transparent glass plate 11 is raised together with the chassis 18, and the base paper 3 and original 9 are pressed against the pressed plate 10 and the transparent glass plate 11 is raised together with the chassis 18. It is pressed between glass plates 11. When the flash lamp 12 emits a flash of light in this state, a document image is formed in the first area of the base paper 3 (see FIG. 4) by this flash of light. Since this image forming principle is well known, its explanation will be omitted.

When the plate making of the original image in the first area is completed,
The pressure device 19 moves in reverse and the transparent glass plate 11
descends together with the chassis 18, and the base paper 3a after plate making is
The document 9 is then placed in a non-squeezed state. Next, when only the first pair of transport rollers 23 and 24 start rotating, the downstream edge portions of the original 9 and the base paper 3a are separated, and the original 9 passes between the guides 22 and 29 and is placed in the main body 1 of the apparatus. The base paper 3a is fed upward, and the base paper 3a after plate making is loosened and sequentially fed into the storage chamber 28 below. At this time, the tension detection microswitch 27 becomes non-conductive because its actuator moves away from the base paper 3a, and a signal indicating that the plate-making operation is in progress is output.

As the base paper 3a is transported downstream by the first transport roller pair 23, 24, the flash timing mark 16a located upstream of the second area is detected by the photo sensors 17, 17. That is, when the second area of the base paper 3 reaches the transparent glass plate 11, the first pair of transport rollers 23 and 24 stop. Thereafter, the same steps as described above are repeated to form a manuscript image in the second area of the base paper 3, and the base paper 3a is stored in the storage chamber 28 one after another. At this time, in order to prevent a non-image forming part from occurring between the first area and the second area of the base paper 3, the intervals between the flash timing marks 16 are set at intervals corresponding to one light emission. Length of the original image to be made into plates (width exposed to flash light)
It is set slightly shorter than .

In this way, for each original 9, 3
When the original image is intermittently conveyed five times and the flash lamp 12 is emitted six times, the original image is made into a plate over the entire area of the base paper 3 (the length of one document), and the plate making process is completed. In this embodiment, the entire area of the original image is printed on the base paper 3a by emitting light six times, but by increasing the size and output of the slush lamp 12, etc., this number of times can be reduced. It is of course possible to reduce it.

Note that the length over which a document image is formed by one light emission can be determined by controlling the rotational speed of the first pair of transport rollers 23 and 24, but if slips and the like are taken into account, As in this embodiment, more accurate conveyance can be achieved by defining the conveyance dimensions by detecting the flash timing mark 16 pre-formed on the base paper 3 with the photo sensors 17, 17. .

When the plate-making operation is completed, the first conveying roller pair 2
3 and 24 and the second pair of conveyance rollers 25 and 26 start rotating, respectively. When the downstream end edge of the base paper 3a advances to the clamping position of the clamper 37, which has been opened in advance, both the transport roller pairs 23, 2
4, 25, and 26 are stopped. At this time, since the distance from the cutters 30, 31 to the clamper 37 is short as described above, the base paper 3a can be conveyed in a substantially horizontal direction by its own stiffness without sagging.

Thereafter, as the rotary cam 39 rotates, the downstream end edge of the base paper 3a is clamped by the clamper 37. At the same time as the base paper 3a is clamped by the clamper 37, the plate cylinder 34 is rotated clockwise at low speed.
When rotated, the base paper 3a after plate making stored in the storage chamber 28 is pulled out and wound around the plate cylinder 34. At this time, the second pair of transport rollers 25 and 26 follow with resistance, so that the base paper 3a is wound around the plate cylinder 34 with an appropriate tension, and wrinkles do not occur. Then, the plate cylinder 34 of the base paper 3a
When the wrapping of the base paper 3a is completed, that is, when the base paper 3a stored in the storage chamber 28 is completely pulled out, the first pair of transport rollers 23 and 24 have stopped, so the base paper 3a is conveying roller pair 23,
The tension becomes high downstream of the microswitch 24, and the microswitch 27 becomes conductive. The rotary blade 30 of the cutter is rotated by the conduction signal from the micro switch 27, and the base paper 3a is cut at a predetermined position.

When the base paper 3a is cut, two test prints are made next.
The printing process is completed and the time required to this point is 29 seconds.

Thereafter, a predetermined number of sheets are printed, and when the predetermined number of prints are completed, the plate cylinder 34 stops with the non-printing area facing downward. This is to prevent printing ink from leaking and dripping due to the screen portion being on the lower side.

In this way, while the first original 9 is being printed, the original image of the second original is made into a plate on the base paper 3 through the same steps as described above. That is, while the first document 9 is being printed, the document image of the second document is made into a plate on the base paper 3 and stored in the storage chamber 19.
will be stored in.

When a predetermined number of sheets of the first document 9 have been printed, the plate discharger 40 is operated and the printed paper 3b is stored in the paper storage box 42.

Although the plate discharge machine 40 operates immediately after printing a predetermined number of sheets, by appropriately selecting the sequence, the process of storing the base paper 3b in the base paper storage box 42 can overlap with the plate-making process in chronological order. In this case, the plate removal time can be virtually ignored.

In addition, when printing a base paper that has already been made into a plate with another device, after releasing the holding member 8, rotate the guide 29 clockwise and insert the base paper along the base paper insertion guide 32. It's enough.

In this embodiment, the plate-making operation and the printing operation are performed at the same time, but in the case of an apparatus that cannot perform both operations at the same time, the base paper 3a is moved to the cutter 30,
31 to the clamper 37 by the same dimension as the distance L2.
What is necessary is just to provide it between 24, 25, and 26. With this configuration, even while the base paper 3a is being pressed between the pressed plate 10 and the transparent glass plate 11, the base paper 3a
The downstream edge can be conveyed by the deflected dimension,
The edge portion thereof can be clamped by the clamper 37.

(g) Effects of the invention In the present invention, since the cutter is provided near the plate cylinder, the distance from the cutter to the plate cylinder is short.
Even if no base paper transport means such as a pair of transport rollers or a guide is interposed between the plate cylinder and the cutter, the downstream edge of the base paper is reliably transported to the clamper.

Therefore, the structure is simplified, the cost is reduced, and the reliability is improved.

In addition, since a guide is provided downstream of the cutter to guide the stencil sheet toward the plate cylinder of a stencil paper different from the stencil paper, the stencil sheet made with another plate making machine can be guided to the plate cylinder by the guide. It can be guided and installed.

Therefore, only the printing press section can be operated, improving the usage efficiency of the entire apparatus.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is an external perspective view, FIG. 2 is an internal configuration diagram,
FIG. 3 is a time chart, and FIG. 4 is a partial plan view of the stencil paper. FIG. 5 is a block diagram of the main parts of a conventional device. DESCRIPTION OF SYMBOLS 1... Apparatus body, 3... Stencil paper, 7... Plate making machine, 9... Document, 23, 24... First conveyance roller pair, 25, 26... Second conveyance roller pair, 28
... Storage chamber, 30, 31 ... Katsuta, 33 ... Printing machine, 34 ... Plate cylinder, 35 ... Paper, 37 ... Clamper.

Claims (1)

[Scope of Claims] 1. Plate-making printing that is equipped with a plate-making means for forming a manuscript image on a band-shaped stencil paper, and a printing means for attaching the stencil paper after plate-making to a printing cylinder and printing on printing paper. In the apparatus, a cutter for cutting the stencil paper in a direction perpendicular to the stencil paper conveyance direction is provided on the upstream side of a portion of the plate cylinder to which the downstream edge portion is attached along the stencil paper conveyance direction. guides are arranged adjacent to each other and are provided on both sides below the cutter to guide a stencil paper different from the stencil paper toward the plate cylinder from the outside;
A stencil printing apparatus characterized in that a stencil sheet conveying means is not provided between a plate cylinder and a cutter.