JPH0651529A - Brush cover for photosensitive planographic printing plate processor - Google Patents

Abstract

PURPOSE:To prevent processing liquid scattering from a brush cover from being foamed by coaxially arranging an inner surface nearly cylindrically formed with a brush. CONSTITUTION:The carrying path of a waterless planographic plate 12 is formed on the upper part of a dyeing liquid recovering tank by a pair of carrying rollers 94, a brush roller 100 and a roller 32, a pair of carrying rollers 96 and a spray pipes 104 and 105 jetting out dyeing liquid are disposed above the carrying path and the dyeing liquid is applied while the waterless planographic plate is interposed and held, and carried by the rollers. The inner surface 107A of the brush roller is formed in a nearly circular-arc state and is covered with the brush cover 107 coaxially arranged. The brush roller rubs the surface of the waterless planographic plate by rotating and removes a photosensitive layer and a silicone rubber layer, etc., which adhere to the surface of the swelled waterless planographic plate. The foam of the dyeing liquid scatters by rotating the brush roller; however, it collides with the inner surface of the brush cover in nearly its tangential direction, so that the foaming does not occur by the collision.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photosensitive lithographic printing plate processing for covering a brush which is provided in a photosensitive lithographic printing plate processing apparatus and rubs the surface of the photosensitive lithographic printing plate to facilitate the processing of the photosensitive lithographic printing plate. The present invention relates to a brush cover of the device.

[0002]

2. Description of the Related Art A lithographic printing plate for making a printing plate for newspaper printing includes a waterless lithographic printing plate having a silicone layer as an ink repellent layer (hereinafter referred to as "waterless lithographic plate"). This waterless planographic printing plate is described in JP-B-44-23042 and JP-B-46-16044, in which a photo-soluble or photo-insolubilizing photosensitive layer and a silicone rubber layer are laminated on a substrate. And JP-A-48-945
No. 04 and Japanese Patent Application Laid-Open No. 50-50102 propose waterless planographic printing plates in which a photoadhesive photosensitive layer and a silicone rubber layer are laminated on a substrate. These can print tens of thousands of sheets without using dampening water.

In the above waterless planographic printing plate, a photosensitive layer and a silicone rubber layer are laminated on a support such as aluminum, and a protective film is laminated on the upper surface of these layers to protect the surface. When an image is printed on this waterless lithographic plate, the photosensitive layer is cured and adheres to the support according to the exposure amount. When a developing solution (for example, developing water consisting essentially of water) is applied to the surface in this state, the developing layer swells the unexposed portion and the light-exposed portion of the photosensitive layer and peels off the silicone rubber layer. The exposed portion of the silicone rubber layer remains according to the amount of exposure.

In the developed waterless planographic printing plate, since the image portion and the non-image portion have substantially the same color, a dyeing solution is applied in order to facilitate the plate inspection work. In this way, the waterless lithographic processing apparatus that processes the waterless lithographic plate is equipped with a brush.By rotating this brush, the surface of the waterless lithographic plate is rubbed to remove the silicone rubber layer and promote the penetration of the dyeing solution. is doing.

The brush rubbing the surface of the waterless planographic plate has developing residue (such as the removed silicone rubber layer) and developing water or a dyeing solution attached thereto, which scatter when the brush rotates. Therefore, the brush is covered with a cover for preventing scattering. Usually, the brush cover that covers these brushes is formed in a substantially rectangular box shape with an opening on the side facing the waterless planographic plate so that the brush cover can be easily processed and attached.

[0006]

However, when the brush to which the treatment liquid is adhered is rotated, splashes of the stain liquid adhered to the brush are scattered at the dyeing part, and when the brush collides with the inner surface of the brush cover, foaming occurs. Therefore, there is a problem that the bubbles grow in the processing tank and overflow from the processing tank to contaminate the inside of the apparatus, or the bubbles of the dyeing solution are mixed into the adjacent processing tank. Further, if the liquid surface of the processing liquid in the processing tank is covered with bubbles, it becomes difficult to monitor the liquid surface, that is, the amount of the processing liquid.

The present invention has been made in consideration of the above facts, and an object thereof is to provide a brush cover of a photosensitive lithographic printing plate processing apparatus which suppresses scattering and foaming of a processing solution.

[0008]

A brush cover of a photosensitive lithographic printing plate processing apparatus according to claim 1 of the present invention is a photosensitive lithographic printing plate processing apparatus equipped with a photosensitive lithographic printing plate processing apparatus, to which a processing liquid is attached. A brush cover that covers the periphery on the side opposite to the photosensitive lithographic printing plate with respect to the brush that rubs while rotating the surface, wherein the inner surface is formed in a substantially cylindrical shape and the inner surface is arranged coaxially with the brush. Characterize.

The brush cover of the photosensitive lithographic printing plate processing apparatus according to claim 2 of the present invention is the brush cover of the photosensitive lithographic printing plate processing apparatus according to claim 1, wherein the processing liquid is a dyeing liquid. Is characterized by.

[0010]

The brush cover of the present invention described above has a semi-cylindrical shape whose inner surface is arranged substantially coaxially with the brush. The treatment liquid and the like adhering to the brush are scattered in a substantially tangential direction by the rotation of the brush. Since the inner surface of the brush cover is formed substantially coaxially with the brush, the scattered droplets collide with the inner surface of the brush cover at a substantially constant angle.

Foaming is most likely to occur when the droplets collide with the wall in a state in which the droplets are almost vertical, and by forming the collision angle at an acute angle with respect to the wall surface, it is possible to suppress the foaming of the droplets of the treatment liquid scattered from the brush. . By making the inner surface of the brush cover coaxial with the brush into a substantially semi-cylindrical shape, it is possible to make the treatment liquid collide with any position on the inner surface of the brush cover at a substantially constant angle that is not an obtuse angle. It can be prevented from colliding with and scattered in all directions, which can suppress the foaming of the processing liquid.

[0012]

1 and 2, there is shown a waterless planographic developing apparatus 10 applied to an embodiment of the present invention. As shown in FIG. 1, the waterless planographic developing apparatus 10 includes an insertion table 1
1 is provided, and the waterless planographic plate 1 is provided from the insertion table 11.
2 is inserted into the casing 10A in a substantially horizontal state. Further, the waterless lithographic developing apparatus 10 can be provided with a stocker 11A on the output side opposite to the insertion table 11, and the waterless lithographic developing apparatus 10 can perform development processing. Are stocked when discharged from the casing 10A. In the waterless planographic developing apparatus 10,
Instead of the insertion table 11, an auto feeder or the like may be attached to automatically feed the waterless planographic plate 12 into the casing 10A. Further, a washing and drying device may be provided between the stocker 11A and the waterless planographic developing device 10 so that the developed waterless planographic plate 12 is continuously dried and discharged. Alternatively, an automatic transport device for the waterless planographic plate 12 may be provided so that the developed waterless planographic plate 12 can be further subjected to plate bending and punching.

FIG. 2 shows a schematic structure of the waterless planographic developing apparatus 10. The waterless planographic developing apparatus 10 is composed of a developing section 14 and a dyeing section 16, and after developing the waterless planographic plate 12, a dyeing process for facilitating the plate inspection work is performed. As the dyeing solution used in the dyeing section 16, a dyeing solution containing crystal violet, astrazone red, or the like is used.

The waterless planographic plate 12 developed by the waterless planographic developing device 10 is, for example, an aluminum substrate on which a primer layer, a photosensitive layer, a silicone rubber layer and a protective film are sequentially laminated. The waterless lithographic plate 12 in which the photosensitive layer is exposed according to the image is developed by the waterless lithographic developing apparatus 10 with the surface protective film peeled off.

The developing section 14 and the dyeing section 16 are covered by an inner casing 15 and are partitioned by a partition wall 15A, and an opening 15B through which the waterless planographic plate 12 is inserted is formed in the partition wall 15A.

The developing tank body 20 of the developing section 14 is opened upward, the bottom portion is formed in an inverted mountain shape, and the developing water collecting tank 22 is formed in the central portion of the bottom portion. Developer water is stored in the developer water recovery tank 22. Further, in the developing section 14, an auxiliary tank 18 is disposed between the insertion side of the waterless planographic plate 12 (on the left side of the paper surface of FIG. 2) and the developing tank body 20. The bottom plate 18A of the auxiliary tank 18 is inclined so that the developing tank main body 20 side is lowered, and the tip end thereof is bent toward the developing water collecting tank 22. The auxiliary tank 18 may be integrally assembled with the developing tank body 20.

The developing water stored in the developing water recovery tank 22 is
Organic substances are not contained in the components, and simple water such as tap water can be applied. Further, the hardness of water may be adjusted by mixing an antifoaming agent with water to prevent generation of bubbles during circulation, or by adding a chelating agent. Furthermore, the number of times of cyclic use may be increased by adding a preservative. An ozone generator may be attached to obtain the same effect as that of the preservative.

In the developing section 14, a pair of transport rollers 24, 25, 26, 28 are arranged in order from the insertion side of the waterless planographic plate 12. The pair of transport rollers 24, 25 are provided in the auxiliary tank 18. A pair of conveying rollers 26, 28 is provided on the upper portion of the developing tank main body 20. Conveyor roller pairs 24, 25, 2
The racks 6 and 28 are supported by a rack side plate (not shown), and are rotated by transmitting the driving force of a driving means (not shown) to sandwich and convey the waterless planographic plate 12 in the direction of arrow A in FIG. Further, the waterless planographic plate 12 is applied with developing water on its surface before passing through the conveying roller pair 24 and the conveying roller pair 28.

A backflow prevention roller 27 is brought into contact with the roller above the transport roller 24 to prevent the backflow of the developing water 18. The backflow prevention roller 27 may also be provided on the other pair of conveying rollers 25, 26, 28. A guide plate 29 is arranged substantially horizontally between the conveying roller pair 24 and the conveying roller pair 25 and between the conveying roller pair 25 and the conveying roller pair 26, so that the waterless planographic plate 12 is inserted from the insertion side. The pairs 24, 25, and 26 are sent out and conveyed in a substantially horizontal state.

Spray pipes 34 are arranged above the conveying roller pairs 24 and 25 on the downstream side. These spray pipes 34 are provided with a plurality of discharge holes (not shown) provided at predetermined intervals along the conveyance width direction of the waterless planographic plate 12, and discharge water toward the space between the conveyance roller pairs 24 and 25. To do. These spray pipes 34 are in communication with a developing water supply device, which will be described later, through a conduit 38. As a result, the developing water is sent to the spray pipe 34, and the developing water is jetted toward the surface of the waterless planographic plate 12 sent from the pair of transport rollers 24 and 25, and is applied to the surface of the waterless planographic plate 12.

The conveying roller pair 28 is arranged at the rearmost portion of the conveying path of the waterless planographic plate 12 in the developing section 14 and has a role of a squeeze roller for squeezing developing water from the waterless planographic plate 12.

A brush roller 30 is arranged between the conveying roller pair 26 and the conveying roller pair 28. The brush roller 30 scrapes the photosensitive layer and the silicone layer corresponding to the image portion on the plate surface by rubbing the plate surface of the waterless planographic plate 12 to be conveyed. The brush roller 30 is also supported by the side plate (not shown) similarly to the pair of transport rollers 24, 25, 26, 28, and is rotated by transmitting the driving force of the driving means (not shown).

The brush roller 30 is formed by planting a brush material on a plastic or metal roll, and rotates in the forward direction (counterclockwise direction in FIG. 2) with respect to the conveying direction of the waterless planographic plate 12. By (normal rotation), the surface of the waterless planographic plate 12 is rubbed. The rotation speed of the brush roller 30 is 100 to 800 rpm (preferably 2 rpm).
00 to 600 rpm) is set.

Further, the brush roller 30 rotates and reciprocates in the axial direction (front and back direction in FIG. 2) to further improve the effect of scraping the silicone layer on the plate surface of the waterless planographic plate 12 (hereinafter Is called forward swing).

The combination of the rotation direction of the brush roller 30 and the rotation direction of the brush roller 100 on the dyeing section 16 side, which will be described later, can be selected as follows. (Developing unit 14) ----- (Dyeing unit 16) -Forward rotation oscillation -------- Reverse oscillation-Forward oscillation -------- Forward oscillation-Normal Rolling oscillating --------- Normal rotation ・ Normal oscillating --------- Reverse rotation (combination of this embodiment) In addition to these, the developing section 14 is reversely oscillated and the dyeing section 16 is changed. A combination of rotation directions such as normal rotation is also possible.

A roller 32 is arranged below the brush roller 30, and a guide plate 31 is arranged downstream of the roller 32. The waterless planographic plate 12 is nipped and conveyed by the roller 32 and the brush roller 30, and is sent out in a substantially horizontal state by the guide plate 31. At this time, the brush roller 30
The surface is rubbed by so that the silicone layer corresponding to the image area is surely scraped off. The guide plate 31 also has a role of preventing vignetting of the waterless planographic plate 12.

The blade 33 is in contact with the upper roller of the conveying roller pair 26 so that the silicone layer scraped off by the brush roller 30 will not be carried out upstream even if it adheres to the conveying roller pair 26. Has been

Since the roller 32 is freely rotatable, when the brush roller 30 is stopped,
When the waterless planographic plate 12 is conveyed, the roller 32 is driven to rotate and the waterless planographic plate 12 is smoothly inserted between the brush roller 30 and the roller 32. Such an action is not performed during the actual developing process, but is performed when inspecting the brushing state of the brush roller 30.

That is, the waterless planographic plate 1 which is entirely exposed
2 is sandwiched between the brush roller 30 and the roller 32, and the brush roller 30 is rotated in a stopped state to determine whether or not the brush rubbing width is appropriate.

In such an inspection, the waterless planographic plate 12
Since the brush roller 30 can be freely inserted and withdrawn while the brush roller 30 is stopped, even if the exposure amount is reduced and the brush roller 30 has a larger amount of displacement, the portion remaining during the insertion and withdrawal does not peel off. , You can get the exact brush width.

Around the brush roller 30, spray pipes 40 and 42 are arranged. Spray pipe 40
Is disposed between the brush roller 30 and the conveying roller pair 26, and a plurality of discharge holes (not shown) are formed toward the brush roller 30. Like the spray pipe 34, the spray pipe 40 is a pipe branching from the pipe 38 and is in communication with a developing water supply device described later. The developing water supplied to the spray pipe 40 by the developing water supply device is jetted and supplied toward the brush roller 30.

The spray pipe 42 is composed of a pair of conveying rollers 28.
Discharge holes (not shown) are formed between the upper and lower rollers. The spray pipe 42 is also branched from the conduit 38 and communicates with a developing water supply device described later. The developing water is sent to the spray pipe 42, and the developing water is ejected between the upper and lower rollers of the conveying roller pair 28.

A brush cover 39 having a substantially rectangular cross section is arranged above the brush roller 30. The brush cover 39 prevents the developing water adhering to the brush roller 30 from scattering due to the rotation of the brush roller 30.

The developing water supply device includes a circulation pump 44, a filter 46, a conduit 38, a circulation pump 44, and a developing water recovery tank 2.
It is constituted by a conduit 48 which communicates with the bottom surface of 2. The circulation pump 44 is a variable flow rate pump and is connected to the control device 52 to control the discharge flow rate. Circulation pump 44
The conduit 38 is connected to the discharge port side of the above, and one end of the conduit 48 is communicated to the suction port side. The other end of the conduit 48 is connected to the bottom of the developer water recovery tank 22 via a valve 55 midway. By the operation of the circulation pump 44, the developing water in the developing water recovery tank 22 is sucked into the circulation pump 44 through the pipe line 48 and passes through the pipe line 38 to spray the spray pipe 3
It is designed to be sent to 4, 40, 42.

A filter 46 is disposed in the middle of the conduit 48, and filters out residues in the developing water passing through the conduit 48 (mainly developing residues consisting of a silicone layer scraped from the surface of the waterless planographic plate 12). It is supposed to do. The mesh of this filter is 10 μ to 500 μ (preferably 100 μ to 300 μ).
μ) is used. A flow rate sensor (not shown) is provided in the middle of the pipeline 38 to detect the flow rate of the developing water passing through the pipeline 38, and when the flow rate of the developing water passing through the pipeline 38 becomes a predetermined flow rate or less, The time of replacement may be notified, and a general flow meter can be used as the flow sensor, but a rotary type is preferable in order to downsize the device.

In the pipeline 48, a pipeline 56 opened and closed by the valve 54 is provided between the valve 55 and the developing water recovery tank 22.
Is branched, and by opening the valve 54,
The developing water in the developing water recovery tank 22 can be discharged to a discharge tank or the like (not shown).

An overflow pipe 50 is provided in the developing water recovery tank 22. The overflow pipe 50 has one end protruding from the liquid surface of the developing water to a predetermined height and the other end connected to the pipe 56. When the amount of the developing water in the developing water recovery tank 22 reaches a predetermined amount or more and reaches the upper end opening of the overflow pipe 50, the developing water of the outermost layer is discharged by the overflow pipe 50. The height of this overflow pipe 50 from the bottom of the developer water recovery tank 22 is
It corresponds to the highest level of the developing water contained in the developing water recovery tank 22.

One end of a pipe 58 is opened in the developing section 14, and the other end of the pipe 58 is connected to a water pipe outside the waterless planographic developing apparatus 10 via a valve 60. By opening the valve 60, the developing water can be supplied to the developing section 14 of the waterless planographic developing apparatus 10. That is, as described above, in the waterless planographic developing apparatus 10 used in this embodiment, tap water is used as the developing water. The pipe 58 for supplying the developing water is connected to the developing unit 14
Is opened in the auxiliary tank 18, and the developing water supplied from the pipe 58 flows into the developing water recovery tank 22 along the bottom plate 18A of the auxiliary tank 18.

A solenoid valve 62 and a flow meter 64 with a regulating valve are arranged in the pipe 58 to which tap water is supplied, and these are connected to the control device 52. Therefore, when the control device 52 opens the solenoid valve 62, tap water is supplied into the waterless lithographic developing device 10, and the control device 52 supplies the adjusting valve-equipped flowmeter 64 to the developing portion 14. In addition to adjusting the flow rate, the control device 52 integrates the supply amount of the developing water. When the integrated value of the supply amount of the developing water reaches a predetermined value, the filter 46 may be replaced, the developing water may be replaced, or the like.

The pipe 58 for supplying tap water is branched between the solenoid valve 62 and the flow meter 64 with a regulating valve, and the dyeing water tank 12 for supplying water to the dyeing section 16 is provided.
8 is opened. A float valve 66 is provided at the tip of the branched pipe 58A, and tap water flows in when the liquid level of the water in the dye water tank 128 falls below a predetermined level.

A cleaning hose 70 is provided in the pipe 58 via a valve 68 so that the developing section 14 and the dyeing section 16 in the waterless lithographic developing apparatus 10 can be washed with tap water.

In this embodiment, tap water is directly drawn into the waterless lithographic developing apparatus 10. However, a tank for storing the developing water is provided in the apparatus, and the water in this tank is pumped up by the water supply pump to develop. It may be supplied to the section 14 and the dyeing section 16.

Waterless planographic developing apparatus 1 applied to this embodiment
0 is disposed on the entrance side of the developing unit 14 and passes through the waterless planographic plate 12, that is, the processing amount (area of the waterless planographic plate 12).
An aluminum detector 86 for detecting the
It is connected to the. In the aluminum detector 86, a plurality of photoelectric tubes are arranged along the width direction of the waterless planographic plate 12, and the controller 52 measures the time when the waterless planographic plate 12 passes over the aluminum detector 86. The processing amount of the planographic plate 12 can be integrated. In addition,
The aluminum detector 86 may detect the area on the printing plate,
The area of the waterless planographic plate 12 may be calculated by previously inputting the length in the width direction into the apparatus and detecting the length with one photoelectric tube.

A heater 88 is arranged at the bottom of the developing water recovery tank 22. The heater 88 is connected to a power source (not shown) to heat the developing water.
By this heater 88, the temperature of the developing water is 15 ° C to 60 ° C.
It is set to ° C (preferably 25 ° C to 50 ° C).

The developing time in this apparatus is 10 seconds to
It is set to 3 minutes (preferably 30 seconds to 2 minutes), and the dyeing time is set to 5 seconds to 1 minute (preferably 10 seconds to 30 seconds).

Next, the dyeing section 16 will be described. The dyeing tank main body 90 of the dyeing section 16 is opened upward similarly to the developing tank main body 20, the bottom is formed in an inverted mountain shape, and the dyeing liquid recovery tank 92 is formed in the center of the bottom, and the development water recovery tank 22 is formed. Is located adjacent to. The dyeing liquid recovery tank 92 contains the above dyeing liquid. An overflow pipe 91 is arranged in the dyeing liquid recovery tank 92. The upper end of the overflow pipe 91 is opened at an upper level position of the dyeing liquid in the upper part of the dyeing liquid recovery tank 92, and the other end of the overflow pipe 91 penetrates the bottom of the dyeing liquid recovery tank 92 and protrudes outward to waste liquid tank 72. It has an opening inside. In the overflow pipe 91, the liquid level in the dyeing liquid recovery tank 92 rises when the dyeing liquid is replenished by the dyeing liquid replenishing device described later, and the overflow pipe 91
The dyeing solution is discharged from the dyeing solution recovery tank 92 to the waste liquid tank 72 when the upper end of the dyeing solution is crossed.

On the upper part of the dyeing tank main body 90, the waterless planographic plate 1
A pair of conveying rollers 94 and 96 are sequentially arranged from the entrance side to the dyeing tank main body 90 along the conveying direction 2. The conveying roller pairs 94 and 96 are supported by a rack side plate (not shown), and are rotated by receiving the driving force of a driving means (not shown).
The waterless planographic plate 12 is sandwiched and conveyed. These conveying roller pairs 94 and 96 are formed of a general rubber material so as not to damage the surface of the waterless planographic plate 12 to be conveyed.

The tip of the blade 95 is in contact with the upper roller of the conveying roller pair 94. As a result, the development dust adhering to the conveyance roller pair 94 is removed by the blade 9
5, the surface of the pair of conveying rollers 94 is kept smooth. The blade 95 also has a role of preventing backflow of the dyeing solution.

A conveying roller pair 98 is arranged on the downstream side of the dye tank main body 90 in the conveying direction of the waterless planographic plate 12. The conveyance roller pair 98 is made of NBR rubber (nitrile butadiene rubber), a Molton roller, or the like as a roll material, so that the wiping property of the dyeing liquid is improved.

A brush roller 100 is arranged between the conveying roller pair 94 and the conveying roller pair 96. The brush roller 100 is also supported by a side plate (not shown) similarly to the pair of transport rollers 94 and 96, and the driving force of a drive unit (not shown) is transmitted to the brush roller 100, for example, in a direction against the transport by the pair of transport rollers 94 and 96 (clockwise in FIG. ) To rotate. The brush roller 100 is formed by planting a brush material on a roll made of plastic or metal, and is rotated in a direction (clockwise direction in FIG. 2) counter to the conveying direction of the waterless planographic plate 12 to rotate the waterless planographic plate 12. It rubs the surface. The rotation number of the brush roller 100 is 100 to
It is set to 800 rpm (preferably 200 to 600 rpm).

The rotation direction of the brush roller 100 is not limited to the rotation (reverse rotation) in the direction opposite to the conveying direction of the waterless planographic plate 12, but may be normal rotation (counterclockwise rotation in the drawing).

A roller 32 is arranged below the brush roller 100, similarly to the lower part of the brush roller 30, and a guide plate 31 is provided adjacent to the upstream side of the roller 32. Therefore, the waterless planographic plate 12 is inserted between the roller 32 and the brush roller 100 in a substantially horizontal state, and the dyeing solution is applied to the surface while being rubbed by the brush roller 100. At this time, the guide plate 31 also has a role of preventing eclipse from the waterless planographic plate 12. An eclipse prevention lever may be arranged to prevent eclipse of the waterless planographic plate 12.

As shown in FIG. 3, the brush roller 1
The periphery of 00 is covered with a brush cover 107. The inner surface 107A of the brush cover 107 has a substantially arc-shaped cross section, that is, a semi-cylindrical shape, and both ends thereof extend downward. The brush cover 107 is arranged so that the inner surface 107A is substantially coaxial with the brush roller 100. The brush cover 107 prevents the stain liquid adhering to the brush roller 100 from scattering and contaminating the surroundings due to the rotation of the brush roller 100.

In this brush cover 107, a substantially cylindrical recess 107B is formed above the conveying roller pair 96 side, and a spray pipe 105 for ejecting the dyeing liquid toward the brush roller 100 is accommodated therein. It is like this.

Around the brush roller 100, a spray pipe 104 is arranged together with a spray pipe 105. The spray pipe 104 is disposed on the upstream upper side of the brush roller 100, and a discharge port (not shown) formed along the axial direction is directed between the pair of transport rollers 94. As a result, the deposits and "dust" adhering to the surface of the transport roller pair 94 are washed off.

As shown in FIG. 2, the spray pipe 104 is connected to a dyeing liquid supply device, which will be described later, through a pipe line 110. This allows the spray pipe 104
The dyeing solution is sent to the sheet, and the dyeing solution is discharged toward the space between the conveying roller pairs 94, so that the dyeing solution is uniformly applied to the surface of the waterless planographic plate 12 that is sandwiched and conveyed by the conveying roller pair 94. ing.

The spray pipe 105 housed in the recess 107B of the brush cover 107 is the spray pipe 104.
Similarly to the above, the brush roller 100 is communicated with the dyeing liquid supply device through the pipe line 110, and the discharge ports (not shown) are provided at predetermined intervals along the axial direction of the brush roller 100.
The dyeing solution is discharged toward and the brush contains the dyeing solution.

The dyeing liquid supply device is composed of a circulation pump 114, a filter 116, and a pipe line 118 connecting the circulation pump 114 and the dyeing liquid recovery tank 92. Circulation pump 11
4, the conduit 110 communicates with the discharge port side and one end of the conduit 118 communicates with the suction port side. The circulation pump 114 is connected to the control device 52, and when the circulation pump 114 is operated by the control device 52, the dyeing liquid in the dyeing liquid recovery tank 92 is sucked into the circulation pump 114 through the pipe 118. Spray pipe 104 through line 110,
It is sent to 105.

A filter 116 is provided in the middle of the pipe 118, and the dust in the dyeing liquid passing through the pipe 118 (mainly the silicone scraped from the surface of the waterless planographic plate 12 brought in from the developing section). It is designed to remove dust from layers.

The dyeing solution replenishing device is provided with a dyeing solution tank 122 containing the dyeing solution, a dyeing solution replenishing tank 132 for diluting the dyeing solution from the dyeing solution tank appropriately with water, and a dyeing solution into the dyeing solution replenishing tank 132. Staining liquid supply pump 12 for supplying
4 and the dyeing liquid replenishing tank 92 by drawing water from the water tank 128 in order to dilute the dyeing liquid supplied to the dyeing liquid collecting tank 92.
It is composed of a water supply pump 130 for supplying to.

One end of a pipe 126 is communicated with the dyeing liquid tank 122, and the other end of the pipe 126 is opened to a replenishing cylinder 132 arranged adjacent to the dyeing liquid collecting tank 92. A dyeing liquid supply pump 124 is arranged in the middle of the conduit 126. Further, the replenishing cylinder 132 has one end opened to the inside of the water tank 128 and the other end of the pipe 134 opened. The water supply pump 130 is arranged in the middle of the pipe 134. The dyeing liquid supply pump 124 and the water supply pump 130 are connected to the control device 52. As a result, when the control device 52 operates the dyeing liquid supply pump 124 and the water supply pump 130, the dyeing liquid and water are supplied with the dyeing liquid and water.
The dye solution is supplied to the dye solution recovery tank 92 via the line 2.

The replenishing amount of the dyeing solution is as follows:
The amount of replenishment is 5-100.
cc / m ² (preferably 10~60cc / m ²⁾ is set to.

A heater 88 is provided at the bottom of the dyeing liquid recovery tank 92.
Is provided and is connected to a power source (not shown) to heat the dyeing solution. The temperature of this dyeing solution is 1
The temperature is set to 5 to 45 ° C. (preferably 20 to 40 ° C.) and controlled by the controller 52.

Further, the waterless lithographic developing apparatus 10 is provided with a liquid level measuring tank which communicates with the developing water collecting tank 22 and the dyeing liquid collecting tank 92 and monitors the respective liquid surfaces. The liquid level measuring tank 136 of the developing water is connected to the developing water collecting tank 22 through a pipe 138, and a liquid level gauge 140 is provided. In addition, the liquid level measuring tank 142 of the staining liquid is provided with a pipe 144.
A liquid level gauge 146 is provided so as to communicate with the dyeing liquid recovery tank 92.

These liquid level gauges 140 and 146 are connected to the control device 52 so as to keep the liquid level of the developing water recovery tank 22 and the dyeing liquid recovery tank 92 within a predetermined range, and When the surface level is out of the predetermined range, the worker is notified by an alarm, a display or the like.

Next, the operation of this embodiment will be described. The waterless planographic plate 12 having an image printed by an image printing device (not shown) is inserted into the developing section 14 after passing above the aluminum detector 86. The light-exposed portion of the waterless lithographic plate 12 inserted into the developing section 14 is exposed to light, that is, the exposed portion cures and adheres to the silicone layer, and the unexposed portion swells or elutes when developing water is applied. It is possible.

From this state, the protective film laminated to protect the surface of the waterless planographic plate 12 is peeled off, and then the waterless planographic plate 12 is inserted into the developing section 14. The waterless planographic plate 12 is coated with the developing water ejected from the spray pipe 34 while being nipped and conveyed by the pair of conveying rollers 24 and 25 of the developing section 14. As a result, the photosensitive layer in the unexposed portion (image portion) of the waterless planographic plate 12 swells and the silicone layer is easily peeled off.

Further, the waterless planographic plate 12 has a pair of conveying rollers 26.
It is nipped and conveyed by the brush roller 30 and the roller 32.
Is inserted between and. Brush roller 30 is waterless planographic 1
It rotates in a direction (counterclockwise direction in FIG. 2) that follows the conveyance direction of 2 and rubs the upper surface of the waterless planographic plate 12 that passes over the roller 32. The developing water is also supplied to the brush roller 30, and the surface of the waterless planographic plate 12 is rubbed by the brush roller 30 while being coated with the developing water, and the silicone rubber layer swollen or eluted by the developing water is scraped off. As a result, the photosensitive layer and the silicone layer corresponding to the exposed portion (non-image portion) remain on the waterless planographic plate 12 and a positive image is formed.

The excess developing water after the developing water applied to the surface of the waterless planographic plate 12 is dropped into the developing water recovery tank 22 and is recovered.

Further, the waterless lithographic plate 12 in which the silicone layer in the unexposed portion (image portion) is scraped off by the brush roller 30 is nipped and conveyed by the conveying roller pair 28, and the developing water is applied again, and the waterless lithographic plate 12 is reapplied. The developing water is squeezed out from. The waterless planographic plate 12 in this state is inserted between the conveying roller pair 94 of the dyeing section 16. This transport roller pair 94
The waterless planographic plate 12 is inserted between the brush roller 100 and the roller 32 by the nipping and conveyance by. The brush roller 100 rotates in a direction (counterclockwise direction in FIG. 2) following the conveyance direction of the waterless planographic plate 12, and the dyeing liquid supplied by being guided by the brush cover 107 is applied to the upper surface of the waterless planographic plate 12. To do. As a result, the dyeing solution adheres to the photosensitive layer, that is, the unexposed area (image area) and is dyed.

Further, the waterless planographic plate 12 has a pair of conveying rollers 96.
The dyeing solution is squeezed while being applied to the surface of the upper roller of the pair of transport rollers 96 guided by the lower end of the brush cover 107 while being applied to the surface,
Be squeezed. When the waterless planographic plate 12 is dyed, the image portion and the non-image portion can be easily discriminated from each other, and the plate inspection operation can be facilitated.

The waterless planographic plate 12 having the dyed image area is sent out from the dyeing section 16 and then inserted between the pair of conveying rollers 98, and the dyeing solution remaining on the surface is wiped off. In addition, you may provide a washing process and a drying process after this.

Here, in the dyeing section 16, the dyeing solution is applied to the surface of the waterless planographic plate 12 by the spray pipes 104 and 105. Further, the dyeing liquid is ejected from the spray pipe 105 onto the brush roller 100. Therefore, the dyeing solution is attached to the brush roller 100, and the surface of the waterless planographic plate 12 is rubbed by the rotation of the brush roller 100, and the dyeing solution attached to the brush roller 100 flies. The dye cover that has flown from the brush roller 100 is prevented from scattering by the brush cover 107. That is, the splash of the dyeing liquid that has flown from the brush roller 100 collides with the inner surface 107A of the brush cover 107 and is prevented from scattering.

Although the stain liquid splashes from the brush roller 100 is ejected along the tangential direction of the outer periphery of the brush roller 100, the inner surface 107A of the brush cover 107 is arranged substantially coaxially with the brush roller 100. The splash does not collide with the inner surface 107A of the brush cover 107 at an angle close to vertical. That is, since the droplets of the dyeing liquid collide with the inner surface 107A at an acute angle θ, foaming is suppressed.

The dyeing liquid for facilitating plate inspection of the waterless planographic plate 12 easily foams, and particularly when it collides with the wall surface at an angle close to vertical, it is most likely to foam. The inner surface 107A of the brush cover 107 is impinged by the droplets of the dyeing solution at an acute angle θ with respect to the tangential direction of the inner surface 107A, and whether the droplets of the dyeing solution that collide with the inner surface 107A fly along the inner surface 107A. It adheres to the inner surface 107A. That is, since the droplets of the dyeing solution become fine and do not scatter in all directions, foaming is suppressed.

The position of the spray pipe may be as shown in FIG. In this case, the dyeing liquid is discharged from the spray pipe 104 on the upstream side of the brush cover 107 toward the upstream side and the downstream side of the waterless planographic printing plate. The discharge to the upstream side cleans the surface of the transport roller pair 94. The discharge to the downstream side is intended to supply the dyeing liquid for dyeing to the brush roller 100. The spray pipe 105 on the downstream side is for washing away the deposits and "dust" adhering to the surface of the conveying roller pair 96.

Therefore, it is possible to suppress the foaming of the dyeing liquid collected from the brush cover 107 into the dyeing liquid collecting tank 92. As a result, the bubbles of the dyeing solution do not grow in the dyeing solution recovery tank 92 in which the droplets collected by the brush cover 107 are stored, and the bubbles of the dyeing solution stain the inside of the apparatus or the adjacent processing tank (developing water). The problem of flowing into the recovery tank 22) does not occur.

In the present embodiment, the present invention is applied to the dyeing section 16 of the waterless planographic developing apparatus 10 in which the treatment liquid is particularly likely to foam, but it is also applicable to the brush cover of the brush roller 30 of the developing section 14. The good thing is of course, the waterless plank 12
The present invention is not limited to the waterless lithographic developing apparatus 10 for processing the above, but may be applied to a brush cover that covers the brush of a general photosensitive lithographic printing plate processing apparatus, and is not limited to the embodiment.

[0079]

As described above, in the brush cover of the photosensitive lithographic printing plate processing apparatus of the present invention, when the brush roller to which the processing liquid is attached is rotated, the processing liquid attached to the brush roller becomes a droplet. It has an excellent effect that it can be prevented from scattering and the foaming due to the collision of the splash with the brush cover can be considerably suppressed. As a result, it becomes possible to measure the position of the liquid surface of the processing liquid with a slight error.

[Brief description of drawings]

FIG. 1 is a schematic outline view showing a waterless planographic processor applied to this embodiment.

FIG. 2 is a schematic configuration diagram showing a waterless planographic processor applied to this embodiment.

FIG. 3 is a schematic sectional view showing a brush cover to which the present invention is applied.

FIG. 4 is a schematic cross-sectional view showing a modified example of the arrangement of the brush cover and the spray pipe.

[Explanation of symbols]

10 Waterless planographic developing device (photosensitive planographic printing plate processing device) 12 Waterless planographic (photosensitive planographic printing plate) 14 Developing part 16 Dyeing part 90 Dyeing tank main body 92 Dyeing liquid collecting tank 100 Brush roller 104, 105 Spray pipe 107 Brush cover 107A inner surface

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[Procedure amendment]

[Submission date] March 8, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

2. Description of the Related Art A silicone rubber layer is used as an ink repellent layer.
Waterless photosensitive planographic printing plate (hereinafter referred to as "waterless planographic printing plate")
For example , Japanese Patent Publication No. 44-23042 and Japanese Patent Publication No. 46-
JP-A-48-94504 and JP-A-50-50102, and a waterless planographic printing plate in which a photo-soluble or photo-insoluble photosensitive layer and a silicone rubber layer are laminated on a substrate described in JP-A-16044. There is proposed a waterless planographic printing plate in which a photoadhesive photosensitive layer and a silicone rubber layer are laminated on a substrate described in each of the above publications. These can print tens of thousands of sheets without using dampening water.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0029

[Correction method] Change

[Correction content]

That is, the waterless planographic plate 1 which is entirely exposed
2 or the unexposed waterless planographic plate 12 is sandwiched between the brush roller 30 and the roller 32, and the brush roller 30 is stopped in a stopped state.
Rotate to determine whether the brush rubbing width is appropriate.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0030

[Correction method] Change

[Correction content]

In such an inspection, the waterless planographic plate 12
Since the brush roller 30 can be freely inserted and withdrawn while the brush roller 30 is stopped, even if the amount of unexposed light or the amount of exposure is increased and the amount of scrubbing by the brush roller 30 is increased, the portion remaining at the time of insertion and withdrawal is peeled off. It is possible to obtain an accurate brush width.

Claims (2)

[Claims] 1. A brush cover which is provided in a photosensitive lithographic printing plate processing apparatus and covers the periphery of the side opposite to the photosensitive lithographic printing plate with respect to a brush that rubs while rotating the surface of the photosensitive lithographic printing plate to which the processing liquid is attached. A brush cover for a photosensitive lithographic printing plate processing apparatus, wherein an inner surface is formed in a substantially cylindrical shape and the inner surface is arranged coaxially with the brush. 2. The brush cover of the photosensitive lithographic printing plate processing apparatus according to claim 1, wherein the processing liquid is a dyeing liquid.