JPH0619223A - Planographic printing plate forming device - Google Patents

Abstract

PURPOSE:To obtain the planographic printing plate forming device which can securely remove a waste sticking on the toner image formation surface of a planographic printing plate. CONSTITUTION:This device is provided with clamping rollers 326 and 327 which are formed of silicone rubber and carry a direct printing plate 14 in a clamped state. An adhesive rubber roller 329 is arranged so that the adhesive rubber layer 329A abuts on the outer peripheral surface of the clamping roller 326, and rotated by the rotation of the clamping roller 326. The adhesive rubber layer 329A is larger in adhesive strength than the silicone rubber. When the direct printing plate 14 having the cutting waste stuck on the toner image formation surface 14A is carried while clamped between the clamping rollers 326 and 327, the cutting waste sticks on the clamping roller 326 and is removed from the toner image formation surface 14A of the direct printing plate 14, and the cutting waste sticking on the outer peripheral surface of the clamping roller 326 sticks on the adhesive rubber layer 329A of the adhesive rubber roller 329 and is removed from the clamping roller 326.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lithographic printing apparatus for developing a lithographic printing plate with a liquid developer.

[0002]

2. Description of the Related Art Conventionally, there is a lithographic plate forming apparatus which develops a lithographic plate with a liquid developer and fixes and elutes the lithographic plate after development processing. In this type of lithographic plate making apparatus, the lithographic plate is developed with a liquid developer composed of toner particles and a carrier liquid in a developing section. In this developing step, the toner particles adhere to the image portion of the planographic printing plate to visualize the electrostatic latent image. The developed lithographic plate is heated in the fixing processing section so that the toner particles are melted and fixed to the lithographic plate. In the lithographic plate subjected to the fixing processing, the non-image area is eluted in the next elution processing section.

By the way, in this type of lithographic printing apparatus, the toner used in the lithographic printing apparatus is oleophilic so that the ink easily adheres during printing, so that the lithographic printing plate in the state where the toner adheres to the side edges is used. When printed with, the ink adheres not only to the toner image but also to the toner adhering to the side edges. Therefore, when printing on a sheet that is larger than the printing plate, such as newspaper printing, the ink adhering to the toner at the side edges is transferred, causing line-like stains and degrading print quality. .

Therefore, in order to solve the above problems,
Prior to the present invention, the present inventor examined the following flat plate making apparatus (see Japanese Patent Application No. 4-43917). The outline is as follows. That is, the side edge of the lithographic plate after development and fixing is chamfered by a cutting device to remove the toner from the side edge of the lithographic plate. The flat plate forming apparatus is provided with a suction device that removes chips generated during chamfering, and suctions and removes chips.

[0005]

However, in the above-described planographic forming apparatus, the chips generated during chamfering can be those scattered in the air, but the chips adhering to the toner image forming surface of the planographic printing plate can be removed. It could not be completely removed.

In consideration of the above facts, an object of the present invention is to provide a planographic forming apparatus capable of surely removing dust adhering to the toner image forming surface of the planographic printing plate.

[0007]

A planographic forming apparatus according to the present invention of claim 1 is a chamfering means for chamfering a side end portion of a planographic printing plate on which a toner image formed by liquid development is fixed, and the chamfering. The lithographic printing plate is rotated by a state in which the adhering part is in contact with the toner image forming surface of the planographic printing plate after chamfering, which is provided with an adhering part on the outer peripheral surface to which the debris attached to the lithographic printing plate is attached. A first roller which has an adhesive portion on its outer peripheral surface, and a second roller which has an adhesive portion on its outer peripheral surface and is rotated in a state where the adhesive portion is in contact with the adhering portion to adhere and remove the debris adhering to the adhering portion to the adhesive portion. Is characterized by having.

The planographic printing apparatus according to the present invention of claim 2 is
A cutting means for cutting the side end portion of the lithographic printing plate on which the toner image formed by liquid development is fixed, and an adhering portion on the outer peripheral surface for adhering debris attached to the lithographic printing plate A first roller that is rotated with the adhering portion in contact with the toner image forming surface of the lithographic printing plate after cutting, and an adhesive portion on an outer peripheral surface, and the adhesive portion contacts the adhering portion. A second roller that is rotated in a contact state and that adheres and removes the waste adhering to the adhering portion to the adhering portion.

[0009]

In the planographic printing apparatus of the first aspect, the chamfering means chamfers the corners of the lithographic printing plate on the toner image forming surface side, and at the same time removes the toner near the corners of the side edges.
When you print using a plate that has been chamfered in this way,
Even if the ink adheres to the toner on the side edge, the ink on the side edge toner does not separate and contact at the chamfered portion, so the ink adhered to the toner on the side edge of the plate is transferred. The print quality is not degraded.

Further, in the above planographic printing apparatus, the outer peripheral surface of the first roller is in contact with the toner image forming surface even if the dust generated by the chamfering of the planographic printing plate adheres to the toner image forming surface of the planographic printing plate. When it is rotated by, the dust adheres to the attachment portion of the first roller and is removed from the toner image forming surface of the lithographic printing plate.

Further, the second roller is rotated in a state where the adhesive portion is in contact with the adhering portion of the first roller, and debris adhering to the adhering portion is attracted to the adhesive portion by the adhesive force of the adhering portion and is adhered and removed. It

Further, in the planographic printing apparatus according to the first aspect, the waste adhered to the first roller is adhered to the second roller to form the first scrap.
Since the toner is removed from the roller, the first roller that comes into contact with the toner image forming surface is kept in a clean state without dust, so that the toner image is not damaged.

In the planographic forming apparatus according to the second aspect, the corners on the toner image forming surface side of the planographic printing plate are cut by the cutting means, and at the same time, the toner near the corners of the side edges is removed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 10, a direct printing plate 14 as a lithographic printing plate used in this embodiment is a thin plate electrophotographic printing plate, and a photoconductive photosensitive layer is formed on one surface of a conductive support 28. The image forming surface 30 is formed. The conductive support 28 is made of an aluminum material,
The thickness is about 0.3 mm. In addition, the conductive support 2
In No. 8, the boundary surface with the photoconductive photosensitive layer 30 is hydrophilized. As the photoconductive photosensitive layer 30, for example, an organic photoconductive photosensitive member is used.

As shown in FIG. 3, an electrophotographic plate making apparatus 10 as a planographic forming apparatus to which the present invention is applied includes a plate feeding section 12, a drawing section 16, a developing and fixing processing section 18, a rotary cutting processing section 120, Cooling unit 300, elution processing unit 22, standby unit 11
8, a puncher section 24 and a plate bending section 26 are provided.

The plate supply section 12 is arranged on the upstream side in the carrying direction of the electrophotographic plate making apparatus 10 (the side opposite to the arrow A direction side in FIG. 3). The plate feeding unit 12 is equipped with a conveyor device (not shown), and the unexposed direct printing plate 14 is shown in FIG.
It is conveyed in the direction of arrow A. In this electrophotographic plate making apparatus 10, the direct printing plate 14 is arranged such that the longitudinal direction is along the arrow A direction in FIG. 3 and each processing is performed.

As shown in FIG. 4, the drawing unit 16 is provided with a carrier 32 on which the direct printing plate 14 is placed.
The carrier 32 can be moved in a direction indicated by an arrow A in FIG. 4 and a direction opposite to the direction indicated by the arrow A by a conveyer (not shown). The drawing unit 16 has an upper side in the middle part in the direction of arrow A in FIG.
A charger 34 for positively charging the photoconductive photosensitive layer 30 of the direct printing plate 14 is provided.
The exposure unit 36 is arranged on the arrow A direction side in FIG.
The exposure section 36 is provided with a semiconductor laser (not shown), and a laser beam is applied to the image section of the photoconductive photosensitive layer 30 after charging to scan and expose the image. In the drawing unit 16, the direct printing plate 14 after exposure is indicated by an arrow A in FIG.
A nipping claw (not shown) for ejecting the plate in the direction is provided.

As shown in FIG. 3, a developing / fixing processing section 18 is arranged on the arrow A side of the drawing section 16 in FIG. The developing / fixing processing unit 18 includes a developing unit 38 and a squeeze unit 4.
0, a drying unit 42, a fixing unit 44, and a transport device (not shown) that transports the direct printing plate 14.

The developing section 38 is arranged on the upstream side of the developing and fixing processing section 18, and is adapted to apply the liquid developer to the direct printing plate 14 after exposure. The developing unit 38
A developing electrode connected to a power source (not shown) and a ground terminal formed of a stainless steel plate and contacting the back surface of the toner image forming surface 14A of the direct printing plate 14 during development are provided. When a voltage is applied between the developing electrode and the ground terminal, the electrostatic latent image on the direct printing plate 14 becomes visible. As the liquid developer, particles of toner 19 in which a pigment imparting properties such as dispersibility, polarity controllability, and fixability is adsorbed on a pigment such as carbon black are dispersed in a carrier liquid. .

The development in the developing section 38 is performed by reversal development, and the positively charged direct printing plate 14 is developed with toner having a positive charge. Further, the portion of the direct printing plate 14 to which the toner is attached becomes lipophilic.

The squeeze section 4 is located downstream of the developing section 38 in the conveying direction of the direct printing plate 14 (on the side of arrow A in FIG. 3).
0 is placed. The squeeze portion 40 is provided with a blower (not shown), and blows air to both sides of the direct printing plate 14.

Direct printing plate 14 rather than squeeze section 40
A drying unit 42 is arranged on the downstream side in the transport direction of (in the direction of arrow A in FIG. 3). The dryer 42 is provided with a dryer (not shown), and the direct printing plate 14 is dried by the warm air of the dryer.

The fixing unit 44 is located downstream of the drying unit 42 in the conveying direction of the direct printing plate 14 (on the side of arrow A in FIG. 3).
Are arranged. The fixing unit 44 includes a plurality of heating lamps (not shown), and the heat of the heating lamps melts and fixes the toner particles adhering to the direct printing plate 14.

A cooling unit 46 is provided downstream of the fixing unit 44 in the conveying direction of the direct printing plate 14 (on the side of arrow A in FIG. 3).
Are arranged. The cooling unit 46 includes a blower (not shown), and the direct printing plate 1 is driven by the wind of the blower.
Cool 4.

A rotary cutting processor 120 is arranged downstream of the cooling unit 46 in the transport direction of the direct printing plate 14 (direction of arrow A in FIG. 3).

As shown in FIG. 5, the rotary cutting processing unit 120.
Is provided with a belt conveyor 126 on the main body base 122 for conveying the direct printing plate 14 conveyed from the cooling section 46 in the direction of arrow A in FIG. The width dimension of the belt conveyor 126 is smaller than the width dimension of the direct printing plate 14 by a predetermined dimension. Therefore, the belt conveyor 1
When the direct printing plate 14 is placed on the belt 26, the side end portion 15 on the width direction side of the direct printing plate 14 is moved to the belt conveyor 126.
A predetermined amount outwardly projecting from the side end portion of.

An optical sensor 127 is provided above the upstream side of the belt conveyor 126, and detects whether or not the direct printing plate 14 has been carried into the rotary cutting processing section 120 from the cooling section 46, and detects a detection signal. Is transmitted to a control device (not shown).

Further, on the main body base 122, four guide rollers 128 are pivotally supported near the side portions of the belt conveyor 126. These guide rollers 128 are respectively in contact with the side end portions 15 of the direct printing plate 14 to prevent movement of the direct printing plate 14 in the width direction (the arrow B direction in FIG. 5 and the direction opposite to the arrow B direction). To be done.

On both sides of the belt conveyor 126 near the intermediate portion in the conveying direction, rotary cutting devices 130 and 132 are arranged opposite to each other.

As shown in FIG. 6, a rotary cutting device 130.
A slit 150 is formed on the side of the belt 138 of the box 138, and the side end portion 15 of the direct printing plate 14 can enter the inside of the box 138 from the slit 150.

On the belt conveyor 126 side of the box 138, a printing plate guide 142 formed of a thick member whose upper surface 144 is horizontal is closely arranged. The plate guide 142 has a top surface 144 with a height of the belt conveyor 126.
It has the same height as the top surface, and the belt conveyor 126
The lower surface of the direct printing plate 14 is supported so that the direct printing plate 14 protruding from the side edge of the plate does not go down.

On the other hand, on the upper inner wall surface of the box 138,
The motor 1 in which the rotary shaft 134 is inclined by a predetermined angle θ from the horizontal direction
36 is attached. A super hard cutter 140 (for example, a super hard cutter Z171 for rotary Anglon manufactured by Minitor Co., Ltd.) is attached to the tip of the rotary shaft 134. Further, the carbide cutter 140 has a rotary shaft 134.
In addition, when the rotary shaft 134 rotates in the forward direction, the blade 140A is fixed in the direction of moving from the image forming surface side of the direct printing plate 14 to the side end portion 15 (moving in the direction of arrow C in FIG. 6). There is. Therefore, burrs and reverse stitches are less likely to occur at the intersections between the cutting surface and the image forming surface of the direct printing plate 14.

Anti-belt conveyor 126 of box 138
A hole 146 is formed in the lower portion of the side surface on the side. Hole 1
One end of a duct 148 is connected to 46, and a suction device (not shown) is connected to the other end of the duct 148. Therefore, when a suction device (not shown) is operated, the outside air is sucked from the slit 150 and the foreign matter and cutting dust in the box 138 are sucked by the suction device (not shown).

On the other hand, the rotary cutting device 132 also has the same configuration as the rotary cutting device 130. Regarding the configuration of the rotary cutting device 132, the same components as those of the rotary cutting device 130 are designated by the same reference numerals, and the description thereof will be omitted. To do.

As shown in FIG. 3, the rotary cutting processing unit 120
A water cooling type cooling unit 300 is provided on the downstream side of the direct printing plate 14 in the transport direction (on the side of the arrow A in FIG. 3).

As shown in FIG. 7, a receiving tray 312 is arranged in the cooling unit 300, and the direct printing plate 14 conveyed from the fixing unit 44 is provided above the receiving tray 312 in the direction of arrow A in FIG. A spray bed 314 leading to

Each of the spray beds 314 has an L-shaped cross section with a vertical wall portion 314A on the upstream side in the transport direction of the direct printing plate 14, and is separated by a predetermined gap in the transport direction of the direct printing plate 14. They are arranged parallel to each other.

Further, two water supply pipes 318 are erected from the bottom of the tray 312. One of the water supply pipes 318 is branched into three, and the tip portions 318A of the respective branch portions are arranged along the lower portions of the three spray beds 314, respectively. The other side of the water supply pipe 318 is branched into two at the upper part of the three spray beds 314, and the tip portions 318B of the respective branch portions are arranged along the gaps of the three spray beds 314, respectively.

Circular through holes 320 are formed at predetermined intervals along the axial direction (direction perpendicular to the paper surface of FIG. 7) on the upper surface of the tip portion 318A of the water supply pipe 318, and the upper wall portion of the spray bed 314 is formed. A circular through hole 322 is formed in 314B coaxially with the through hole 320. On the other hand, in the lower portion of the tip portion 318B of the water supply pipe 318, there is an axial direction (see FIG.
Circular through-holes 3 at predetermined intervals along the
24 is provided as a spray nozzle.

Each of the water supply pipes 318 is extended downward through the bottom of the tray 312, and each of the water supply pipes 318 is put into one after passing through the cock 336, and is put into the cooling water tank 328 through the filter 338 and the pump 340. Has reached
The cooling water tank 328 is filled with cooling water.

A temperature sensor 342 for detecting the temperature of the cooling water is provided inside the cooling water tank 328, and the temperature sensor 342 is connected to the control device 344. In addition, the cooling water tank 328 is the cooler 346.
This cooler 346 is connected to the controller 344.
Are linked to. The controller 344 operates the cooler 346 to keep the temperature of the cooling water constant.

At the bottom of the tray 312, the recovery pipe 33 is provided.
The two ends of the recovery pipe 332 are connected to each other, and the other end of the recovery pipe 332 reaches a precipitation tank 348 arranged above the cooling water tank 328.

The settling tank 348 is in the form of a box whose longitudinal direction is oriented in the direction of the arrow A opened at the top, and a partition 350 provided at the middle portion in the longitudinal direction makes the inside of the precipitation tank 348 in the longitudinal direction.
One of them is divided into a first precipitation tank 352 and the other is a second precipitation tank 354.

The height (H2) of the partition wall 350 is determined by the partition wall 350.
Width direction (direction of arrow B and direction opposite to arrow B)
The height (H3) of the side wall 360 in the direction opposite to the arrow A direction of the second settling tank 354 is lower than that of the side walls 356 and 358 to which both ends of the partition wall 350 are connected. It is lower than H2). The recovery pipe 3
The other end of 32 is the bottom surface 3 inside the first settling tank 352.
It is set at a position away from 52A.

As shown in FIG. 1, on the downstream side of the cooling unit 300 in the transport direction of the direct printing plate 14, a pair of sandwiching rollers 32 for transporting the direct printing plate 14 in a sandwiched state.
6, 327, an adhesive rubber roller 329, a U-shaped fixing member 302 that rotatably supports these, a flat plate-shaped fixing member 30.
4 and a supporting member 306 are provided.

The U-shaped fixing member 302 has a circular hole 3 at the center.
02C has a flat plate portion 302A penetratingly formed therein, and both end portions of the flat plate portion 302A in the arrow A direction in FIG. 1 and in the direction opposite to the arrow A direction are extended in parallel in the arrow B direction in FIG. The projecting ends are bent at right angles to opposite sides to form a mounting portion 302B. The U-shaped fixing member 302 is
The saucer 312 shown in FIG. 7 is provided through each attachment portion 302B.
Is fixed to one side wall arranged in a direction orthogonal to the paper surface of FIG.

On the flat plate portion 302A of the U-shaped fixing member 302, a rectangular flat plate-shaped fixing member 304 is superposed on the side opposite to the arrow B direction in FIG. Flat plate fixing member 304
Has a circular hole 304A on the upper side (the direction of the arrow C in FIG. 1). Below the circular hole 304A, the flat plate portion 30 is provided.
A circular hole 304B communicating with the circular hole 302C of 2A is formed. A bearing 308 for supporting the nipping roller 326 is fitted in the circular hole 304A, and a bearing 310 for supporting the nipping roller 327 is fitted in the circular hole 304B and the circular hole 302C.

A support member 306 is superposed on the flat plate-shaped fixing member 304 on the side opposite to the direction of arrow B in FIG. The support member 306 includes an elongated attachment portion 306A and a support portion 306B extending from the upper end of the attachment portion 306A to the side opposite to the direction of arrow A in FIG. 1, and has a substantially L shape. There is. The mounting portion 306A is a flat plate-shaped fixing member 30.
4 is overlapped at the end portion in the direction of arrow A in FIG. The U-shaped fixing member 302, the flat plate-shaped fixing member 304, and the supporting member 306 are fixed by a bolt 319 inserted into a through hole formed coaxially with each other, and a nut (not shown).

A substantially U-shaped notch 306C is formed in the supporting portion 306B of the supporting member 306 with its upper end opened, and is used for supporting the adhesive rubber roller 329.

The nip roller 326 is an elastic body having a weak adhesive force (adhesive force capable of removing dust adhering to the surface of the direct printing plate 14 and not deforming the direct printing plate 14), in this embodiment. It is made of silicone rubber and is fixed to a fixed shaft 330 passing through its axis. Both axial end portions of the fixed shaft 330 project from both end portions of the nip roller 326 (only one end portion is shown in FIG. 1). One protruding portion 330A of the fixed shaft 330 is pivotally supported by the bearing 308, and the other protruding portion (not shown) of the fixed shaft 330 is
The U-shaped fixing member 302 of the tray 312 is pivotally supported by a mounting member fixed to a side surface facing the fixed side surface. As a result, the nip roller 326 causes the fixed shaft 3 to move.
It is configured such that it can rotate integrally with the fixed shaft 330 with 30 as the center of rotation. In addition, the fixed shaft 3
A gear 307 is fixed to the protrusion 330A of the gear 30.

The sandwiching roller 327 is also sandwiched by the sandwiching roller 326.
Similar to the above, it is made of silicone rubber and is fixed to the fixed shaft 331 in the same manner as the sandwiching roller 326. One protruding portion 331A of the fixed shaft 331 is rotatably supported by the bearing 310 and the other side of the fixed shaft 331 is illustrated. The protruding portion not supported is axially supported by the mounting member (not shown), and the holding roller 327 can rotate together with the fixed shaft 331 about the fixed shaft 331 as a rotation center. A gear 309 is fixed to one protruding portion 331A of the fixed shaft 331, and the gear 309 meshes with the gear 307.

The gear 309 is adapted to be rotated by the driving force of a motor (not shown) being transmitted through a driving force transmitting member. As a result, when the motor is driven, a rotational force can also be applied to the gear 307 via the gear 309, the nipping roller 326 and the nipping roller 327 are rotated, and the direct printing plate 14 includes the nipping roller 326 and the nipping roller 326. While being held by the rollers 327, the cooling water is squeezed and conveyed to the elution processing unit 22 in the direction of arrow A in FIG. In this case, the outer peripheral surface 32 of the nip roller 326 is
6A is made of silicone rubber as described above and has adhesiveness, so that the rotary cutting devices 130, 1
The cutting dust generated by cutting the side edge portion 15 of the direct printing plate 14 by 32 and adhering to the toner image forming surface 14A is adhered to the outer peripheral surface 326A of the nip roller 326.

An adhesive rubber roller 329 is provided above the nip roller 326. Adhesive rubber roller 329
Has its entire outer peripheral surface covered with an adhesive rubber layer 329A. The adhesive rubber layer 329A includes a nip roller 326,
It has a larger adhesive force to the cutting dust than the silicone rubber forming 327.

The adhesive rubber roller 329 is fixed to the fixed shaft 333 passing through the axial center of the adhesive rubber roller 329.
33 projects from both ends of the adhesive rubber roller 329 (only one end is shown in FIG. 1),
It is a protrusion 333A. The protruding portion 333A is provided with a pin 333C whose tip portion has a small diameter through a step portion 333B so as to project, and corresponds to the pulley 311. The pulley 311 is integrally provided with a thin-walled prismatic fitting portion 315 for fitting into the notch 306C.
C penetrates the fitting portion 315 and the pulley 311. In this state, the E-ring 313 is fitted into the ring groove 333D formed at the tip of the pin 333C, and the pulley 311 includes the E-ring 313 and the step portion 333B.
It is held between and so that it does not come out of the fixed shaft 330.

Although only one end of the adhesive rubber roller 329 is shown in FIG. 1, the other end has the same structure, and the adhesive rubber roller 329 has the fitting portions 315 at both ends thereof as the supporting member. It is supported by the support member 306 while being fitted in the notch 306C of the 306. Further, in the adhesive rubber roller 329, a coil spring 317 is wound around the pulleys 311 provided at both ends from above, and the adhesive rubber layer 329A of the adhesive rubber roller 329 is sandwiched by the urging force of the coil spring 317. Three
It is pressed against the outer peripheral surface 326A of 26. As a result, when the holding roller 326 is rotated, the adhesive rubber roller 329 is also rotated. In this case, since the adhesive rubber layer 329A of the adhesive rubber roller 329 has a larger adhesive force to the cutting dust than the silicone rubber forming the nipping roller 326, the nipping roller 32 is used.
The cutting dust adhering to 6 can be removed by adhering it to the adhesive rubber layer 329A.

The coil spring 317 is used for the support member 30.
It is locked to each of the locking pins 321A and 321B formed in the six support portions 306B with the notch 306C separated.

The direct printing plate 14 includes a nip roller 32.
6, 327 is conveyed in a state of being sandwiched by 6, 327 and reaches the elution processing unit 22 in a state where the cooling water is squeezed out.

As shown in FIG. 8, a direct printing plate 14 is provided with an alkaline solution in the elution processing portion 22 to form a non-image portion of the direct printing plate 14 (that is, a non-image portion other than the portion where the toner image is formed). Elution section 48 for eluting the photoconductive photoreceptor layer, squeeze section 50 for removing an excess alkaline solution adhering to the direct printing plate 14, and a water washing section for washing the squeezed direct printing plate 14 to remove the alkaline solution. 5
2, a gum solution application section 54 for applying a gum solution to the washed direct printing plate 14, a drying section 114 for drying the direct printing plate 14 coated with the gum solution, and the direct printing plate 1
A plurality of transport rollers 56, 58, 6 for sandwiching and transporting 4
0, 62, 64, 66 are provided.

The carrying roller 56 is arranged on the upstream side of the elution processing section 22 (the side opposite to the direction of the arrow A in FIG. 8) and is on the downstream side of the carrying roller 56 in the carrying direction of the direct printing plate 14 ( The elution portion 48 is arranged on the arrow A direction side in FIG. 8. The elution section 48 is provided with an elution tank 68, and the elution tank 68 is provided with conveyance rollers 58, 60 and a plurality of guide rollers 88. The direct printing plate 14 is transported to the transport rollers 58 and 60 and the guide roller 88 and immersed in the alkaline solution in the elution tank 68. A circulation pump 84 is connected to the elution tank 68, and the alkaline solution in the tank is sucked to spray the alkaline solution from the nozzle 86 onto the direct printing plate 14.

Further, the direct printing plate 14 in the elution tank 68
A roller-shaped brush 90 is arranged at a position corresponding to the photoconductive photosensitive layer 30. The brush 90 is connected to a rotation driving means such as a motor (not shown), and the rotation driving means rotates the brush 90. A drain pipe 82 is connected to the lower end of the elution tank 68, and the deteriorated alkaline solution in the tank can be discharged to the outside of the tank through the drain pipe 82.

A squeeze portion 50 is arranged downstream of the elution tank 68 in the conveying direction of the direct printing plate 14 (direction of arrow A in FIG. 8), and a conveying roller 62 is arranged in the squeeze portion 50. There is. The squeeze section 50 has a receiving section 9
4 is provided, and the direct printing plate 14 is sandwiched by the transport rollers 62 to remove the alkaline solution adhering to the surface thereof. A roller 96 is disposed on the receiving portion 94 side of the transport roller 62 so as to be in close contact with the transport roller 62, and the alkaline solution removed by the transport roller 62 is transferred to the roller 9.
6 to the receiving portion 94. A pump 98 for returning the removed alkaline solution to the elution tank 68 is connected to the receiving portion 94.

A washing section 52 is provided downstream of the elution section 48 in the conveying direction of the direct printing plate 14 (on the side of arrow A in FIG. 8).
Is arranged, and the transport roller 64 is arranged in the water washing section 52. The water washing section 52 has a roller-shaped brush 1
00 and a water receiving tank 102 are provided. Water tank 10
Wash water is stored in 2 and this wash water is pump 1
It is sucked up by 04 and sprayed from the nozzle 106 to the direct printing plate 14. The brush 100 is arranged at a position corresponding to the photoconductive photosensitive layer 30 of the direct printing plate 14, and the photoconductive photosensitive layer 30 of the direct printing plate 14 can be washed.

A gum solution application section 54 is arranged downstream of the water washing section 52 in the transport direction of the direct printing plate 14 (direction of arrow A in FIG. 8). In this gum solution application section 54,
The gum solution tank 110 is provided, and the gum solution is stored in the gum solution tank 110. The gum solution in the gum solution tank 110 is sucked up by the pump 112 and sprayed from the nozzle 115 to the direct printing plate 14.

Direct printing plate 1 rather than gum solution application section 54
4, a drying unit 114 is arranged on the downstream side in the conveyance direction (the direction of the arrow A in FIG. 8). The drying unit 114 is provided with a drier 116, and the drier 116 dries the gum-treated direct printing plate 14.

As shown in FIG. 3, a waiting section 118 is arranged downstream of the elution processing section 22 in the transport direction of the direct printing plate 14 (on the side of the arrow A in FIG. 3), and after the elution processing. The direct printing plate 14 is conveyed to the standby section 118. The standby unit 118 is provided with a conveyor device (not shown), and this conveyor device conveys the direct printing plate 14 in the direction of arrow A in FIG.

A puncher section 24 is arranged downstream of the standby section 118 in the transport direction of the direct printing plate 14 (on the side of arrow A in FIG. 3). The puncher portion 24 is provided with a punch (not shown) that forms a notch for positioning the direct printing plate 14 when the plate is placed.

Direct printing plate 1 rather than puncher section 24
The plate curving portion 26 is arranged on the downstream side of the conveyance direction 4 (the arrow A direction in FIG. 3). The plate bending section 26 is provided with a folding device (not shown) that bends both ends of the direct printing plate 14 in the longitudinal direction by a predetermined dimension.

The operation of this embodiment will be described below. As shown in FIG. 3, the unexposed direct printing plate 14 is arranged along the conveying direction with the photoconductive photosensitive layer 30 facing upward, and is transferred to the drawing unit 16 by a conveyor device (not shown) of the plate supply unit 12. Be transported. As shown in FIG. 4, in the drawing unit 16, the transport table 32 on which the direct printing plate 14 is placed is moved in the direction of arrow A in FIG. During this movement, the direct printing plate 14 on the carrier 32
The photoconductive photosensitive layer 30 is positively charged by the charger 34. When the direct printing plate 14 is conveyed directly below the exposure unit 36, the surface of the photoconductive photosensitive layer 30 is irradiated with a laser beam corresponding to an original image emitted from a semiconductor laser (not shown). As a result, the incident portion on which the laser beam is incident becomes conductive, and positive charges move from the surface of the incident portion of the photoconductive photosensitive layer 30 to form an electrostatic latent image corresponding to image information. .

Direct printing plate 14 on which an electrostatic latent image is formed
Is clamped at its end by a clamping claw (not shown), and is carried out from the drawing section 16 to the developing / fixing processing section 18.

In the developing and fixing processing section 18, the direct printing plate 14 has the positively charged toner particles in the liquid developer in the developing section 38 attached to the exposed portions of the photoconductive photosensitive layer 30.

When the direct printing plate 14 reaches the squeeze portion 40, air from a blower (not shown) is blown to both surfaces of the direct printing plate 14 to remove the excess liquid developer adhering to both surfaces. After that, direct printing plate 14
Is conveyed to the drying unit 42, and the toner wet with warm air from a dryer (not shown) is dried.

The direct printing plate 14 thus developed is conveyed to the fixing section 44. In the fixing unit 44, the toner attached to the direct printing plate 14 is melted and fixed by the heat of a heating lamp (not shown) and fixed. The direct printing plate 14 heated by the fixing unit 44 is cooled by the cooling unit 46.
After being blown and cooled by, the sheet is conveyed to the rotary cutting processing section 120.

As shown in FIG. 5, the rotary cutting processing unit 120
The direct printing plate 14 conveyed to the guide roller 12
8 guides the arrow B direction and the side end portion 15 on the opposite side to the arrow B direction side of FIG.
6 is conveyed in the direction of arrow A in FIG.

Side edge 1 of the conveyed direct printing plate 14
5 is inserted through the slits 150 of the rotary cutting devices 130 and 132, as shown in FIG. 9, the side end portion 15 of the direct printing plate 14 on which the toner 19 has adhered to the blade of the carbide cutter 140 rotated by the motor 136 is shown. The corners of the photoconductive photosensitive layer 30 side are brought into contact with each other to be cut and chamfered. By operating a suction device (not shown) during this cutting, cutting dust scattered in the air is sucked into the suction device via the duct 148. Further, since the outside air is sucked through the slit 150 at the time of the suction, the cutting dust does not scatter to the outside of the box 138. The chamfering dimension of the direct printing plate 14 is about half the wall thickness.

The direct printing plate 14 after the chamfering process is conveyed to the cooling unit 300 by the belt conveyor 126,
It is conveyed along the spray bed 314 in the direction of arrow A in FIG. 7. When the optical sensor 316 detects the direct printing plate 14, the controller 344 operates the pump 340. As a result, the cooling water tank 32
8, the cooling water is pumped up, and the cooling water is transferred to the tip portion 318A.
The direct printing plate 14 is sprayed from the through hole 320 of No. 3 and the direct printing plate 14 is sprayed from the through hole 324 of the tip portion 318B. Therefore, the direct printing plate 14 is quickly cooled.

The cooled direct printing plate 14 is conveyed while being sandwiched by the sandwiching rollers 326 and 327, and is transported to the elution processing section 22. During this conveyance, the adhesive outer peripheral surface 326A of the nip roller 326 is rotated while being in contact with the toner image forming surface 14A of the direct printing plate 14, and the cutting dust attached to the toner image forming surface 14A is
The toner is attached to the outer peripheral surface 326A of the nip roller 326 and is removed from the toner image forming surface 14A.

When the direct printing plate 14 is conveyed,
The adhesive rubber roller 329 is rotated with the adhesive rubber layer 329A abutting on the outer peripheral surface of the nip roller 326. In this case, since the adhesive rubber layer 329A has a viscosity that is much higher than that of the silicone rubber forming the nipping roller 326 with respect to the cutting dust, the cutting dust and the outer peripheral surface 32 of the nipping roller 326 are large.
Overcoming the adhesive force with 6A, the cutting scraps cause the adhesive rubber layer 13
Is attracted to and stuck. Therefore, the outer peripheral surface 326A of the nip roller 326 is always in a state where no cutting dust is attached. In this embodiment, not only the cutting dust generated by chamfering and scattered in the air, but also the cutting dust attached to the toner image forming surface 14A of the direct printing plate 14 can be reliably removed. Therefore, cutting dust does not remain on the outer peripheral surface 326 of the nip roller 326, and the toner image is not damaged when the direct printing plate 14 is conveyed. Further, in the present embodiment, the cutting waste adhered to the toner image forming surface 14A is
Without adhering the adhesive rubber layer 329A having a large adhesive force directly to the toner image forming surface 14A, the cutting debris is once adhered to the outer peripheral surface 326A of the nip roller 326, and then adhered to the adhesive rubber layer 329A to be removed. There is. Therefore, when the direct printing plate 14 is conveyed, it is not firmly adhered to the outer peripheral surface 326A of the nip roller 326 to be deformed.

The direct printing plate 14 from which the cutting dust has been removed from the toner image forming surface 14 A is conveyed to the elution processing section 22. The direct printing plate 14 is sandwiched by the transport rollers 56, transported into the elution tank 68, and immersed in the alkaline solution. Direct printing plate 14 dipped in alkaline solution
Means that the photoconductive photoreceptor layer 30 without toner adheres
That is, the non-image area is eluted. At this time, the photoconductive photoreceptor layer 30 of the direct printing plate 14 is rubbed by the brush 90 to promote the elution reaction. By this elution treatment, the surface of the direct printing plate 14 to which the toner is not attached exposes the surface of the conductive support 14 which has been subjected to the hydrophilic treatment.

After the elution treatment, the direct printing plate 14 is squeezed by the squeeze portion 50, which is sandwiched by the conveying rollers 62 and the alkaline solution attached to the surface thereof is squeezed. The squeezed alkaline solution falls through the roller 96 and is collected in the receiving portion 94. The alkaline solution accumulated in the receiving portion 94 is returned to the elution tank 68 by the pump 98.

The squeezed direct printing plate 14 is conveyed to the water washing section 52, and washing water is sprayed from the nozzle 106. Further, the direct printing plate 14 is rubbed by the brush 100 to completely remove the attached alkaline solution.

When the direct printing plate 14 is conveyed and reaches the gum solution applying section 54, the gum solution is jetted from the nozzle 115 and the gum solution is applied to the direct printing plate 14. The direct printing plate 14 after the gum treatment is conveyed to the direct printing plate 1
When 4 reaches the drying section 114, the gum liquid attached to the direct printing plate 14 is dried by the hot air of the dryer 116. As a result, the non-image portion of the direct printing plate 14 (portion to which toner is not attached) is made hydrophilic.

The direct printing plate 14 processed by the elution processing section 22 is temporarily waited by the waiting section 118, and then sent to the puncher section 24 after the plate inspection work and the like, and is sent to a puncher (not shown) for positioning for plate making. A notch is formed.

In the direct printing plate 14 having the notches for positioning formed in the puncher portion 24, both ends in the longitudinal direction of the direct printing plate 14 are bent to a predetermined size by a bending device (not shown) of the plate bending portion 26. Thus, the plate making process of the direct printing plate 14 is completed.

As described above, when printing is performed with the direct printing plate 14 made by the electrophotographic plate making apparatus 10 according to the present invention, the toner 19 attached to the side end portion 15 of the direct printing plate 14 (see FIG. 9). ) Are separated from each other via the rotary cutting processing section and do not come into contact with each other, so that even if ink adheres to the toner of the side end portion 15, this ink will not be transferred.

As shown in FIG. 5, in the electrophotographic plate making apparatus 10 of the present embodiment, the rotary cutting processing section 120 is provided with the air jetting apparatus 200. This air ejection device 200
Is composed of a blower (not shown), a blower pipe 202 for guiding the air blown from the blower, and a nozzle 204 attached to the tip of the blower pipe 202.

The nozzle 204 is arranged above the belt conveyor 126 between the rotary cutting device 132 and the rotary cutting device 130. The nozzle 204 has a pair of outlets 20.
6 are provided, each opening towards the slit 150 of the box 138.

Therefore, when a blower (not shown) is operated, the air (arrow C) blown out from the air outlet 206 flows into the box 138 through the slit 150, so that the removal of cutting chips becomes more reliable.

In the above embodiment, since the cutting dust adhering to the toner image forming surface 14A is removed by the nip roller 326 and the adhesive rubber roller 329, the direct printing plate 1
No cutting chips are mixed into the alkaline liquid when the elution treatment of No. 4 is performed. Further, cutting dust does not mix into the gum liquid layer 110 when the gum liquid is applied.

In the above embodiment, the adhesive rubber roller 329 is arranged only on the side of the sandwiching roller 326 which comes into contact with the toner image forming surface 14A of the direct printing plate 14 and rotates. You may arrange | position on the both sides with the pinch roller 327 side which contacts and rotates to the back surface of 14 A of toner image forming surfaces. At the time of development, the direct printing plate 14 is conveyed with the ground terminal in contact with the surface of the direct printing plate 14 opposite to the toner image forming surface 14A. Even if scraps are generated by scraping the surface of the printing plate 14 on the side opposite to the toner image forming surface 14A, the scraps are removed by the nip roller 327 and the adhesive rubber roller arranged in contact therewith.

[0091]

As described above, since the planographic forming apparatus according to the present invention of claim 1 and claim 2 has the above-mentioned structure, it is possible to surely remove the dust adhering to the toner image forming surface of the planographic printing plate. It has an excellent effect.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a sandwiching roller and an adhesive rubber roller for removing dust generated by cutting in a planographic printing apparatus according to the present invention.

FIG. 2 is a side view of the nip roller and the adhesive rubber roller of FIG. 1 viewed from the axial direction.

FIG. 3 is a plan view showing an arrangement of processing units of the planographic printing apparatus according to the present invention.

FIG. 4 is a component layout view showing the layout of each component forming the drawing unit of FIG.

FIG. 5 is a perspective view showing a rotary cutting unit of the planographic printing apparatus.

FIG. 6 is a cross-sectional view showing a rotary cutting device of a lithographic plate making apparatus according to the present invention.

FIG. 7 is a cross-sectional view showing a cooling unit of the planographic printing apparatus of the invention.

FIG. 8 is a cross-sectional view showing an elution treatment section of FIG.

FIG. 9 is a cross-sectional view showing a lithographic printing plate that has been cut.

FIG. 10 is a cross-sectional view showing the structure of a lithographic printing plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electrophotographic plate making apparatus 14 Direct printing plate (flat plate printing plate) 15 Side edge part 120 Rotating cutting processing part 130 Rotating cutting device (chamfering means) 132 Rotating cutting device (chamfering means) 326 Clamping roller (1st roller) 329 Adhesive rubber roller (Second roller)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Okutsu 1250 Takematsu, Minamiashigara City, Kanagawa Prefecture Fuji Kikai Kogyo Co., Ltd.

Claims (2)

[Claims] 1. A chamfering means for chamfering a side end portion of a lithographic printing plate having a toner image formed by liquid development fixed thereon, and an adhering portion to which debris generated by the chamfering and adhering to the lithographic printing plate is attached. A first roller that is provided on the outer peripheral surface and is rotated with the adhering portion in contact with the toner image forming surface of the conveyed planographic printing plate after chamfering; and an adhesive portion on the outer peripheral surface. A lithographic printing apparatus, comprising: a second roller that is rotated in a state in which the section is in contact with the adhering section and that adheres the scraps adhering to the adhering section to the adhesive section to remove the scrap. 2. A cutting means for cutting a side end portion of a lithographic printing plate on which a toner image formed by liquid development is fixed, and an attachment portion to which debris produced by the cutting and attached to the lithographic printing plate is attached. A first roller which is provided on the outer peripheral surface and is rotated while the adhering portion is in contact with the toner image forming surface of the conveyed planographic printing plate after cutting; and an adhesive portion on the outer peripheral surface. A lithographic printing apparatus, comprising: a second roller that is rotated in a state in which the section is in contact with the adhering section and that adheres the scraps adhering to the adhering section to the adhesive section to remove the scrap.