JPH1062953A - Photosensitive material processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photosensitive material processing device which is capable of maintaining the entire surface of a heating roller at an always uniform temp. and preventing the deformation thereof even when a pressing roller is used. SOLUTION: The partial temp. rise of the heating roller 41 and the deformation, etc., of the pressing roller 42 are prevented by the concentrated transfer of the heat from a heater 165 upward by repeating the intermittent rotating operation of driving a driving motor 172 to rotate the heating roller 41 and the pressing roller 42 for one second at the time of standing by, then stopping the driving motor 172 for 60 seconds to stop the rotation of the heating roller 41 and the pressing roller 42. The heating roller 41 is so controlled that the stop angle position at the time of intermittent rotation does not attain the same angular position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photosensitive material processing apparatus for processing a photosensitive material with a processing solution.

[0002]

2. Description of the Related Art Photosensitive materials such as films, photographic papers, printing plates and the like are processed with a processing solution such as a developing solution, a fixing solution, a stabilizing solution, and washing water after an image is recorded. As a photosensitive material processing apparatus for performing such processing, a photosensitive material is transported into a processing tank storing a processing liquid by a transporting unit including a plurality of transport roller pairs or the like, and the photosensitive material is immersed in the processing liquid. An immersion-type processing apparatus that performs processing by such a method is known.

In such an immersion type processing apparatus,
Since the processing solution deteriorates due to processing fatigue accompanying the processing of the photosensitive material or temporal fatigue due to carbon dioxide or oxygen in the atmosphere, the deterioration of the processing solution is recovered by replenishing the processing solution with a replenisher. Therefore, the components of the processing liquid at the start of the processing are different from the components of the processing liquid when the processing is continued thereafter, and it is impossible to perform strictly uniform processing. In addition, such an immersion type processing apparatus has a problem that the amount of waste liquid of the processing liquid is large and the maintainability of the apparatus is poor.

As a photosensitive material processing apparatus for solving such problems, instead of immersing the photosensitive material in the processing solution, an amount of the processing solution required for processing the photosensitive material is applied to the photosensitive surface of the photosensitive material. There is also used a coating type processing apparatus for performing the processing. For example, in Japanese Patent Publication No. 6-7257, as a processing apparatus of such a coating method, a wire bar formed by spirally winding a wire around a shaft around a photosensitive surface of a photosensitive material after supplying a processing liquid is used. There is disclosed a processing apparatus in which an amount of a processing liquid applied to a photosensitive material is measured by bringing the photosensitive material into contact with the photosensitive material so that only a necessary amount of the processing liquid is applied to the photosensitive material.

In such a processing apparatus of the coating system, the processing liquid is usually heated to a predetermined temperature. However, since the amount of the processing liquid applied to the photosensitive material is small, the processing liquid is applied to the photosensitive material. At this point, the temperature of the processing solution decreases due to the heat capacity of the photosensitive material. For this reason, in the processing apparatus described in Japanese Patent Publication No. 6-7257,
A heater is provided inside the photosensitive material before the processing liquid is applied, and the photosensitive material is heated in advance by a heating roller that rotates in synchronization with the photosensitive material.

[0006]

Since the rotation of such a heating roller is stopped when the processing of the photosensitive material is interrupted, the heat of the heater disposed inside the heating roller is increased. Since the heat is transmitted in a concentrated manner, the upper surface of the heating roller is heated more strongly, and the temperature distribution on the outer peripheral surface of the heating roller becomes uneven. Therefore, when the processing of the photosensitive material is restarted, the photosensitive material conveyed in contact with the heating roller is heated in an uneven state,
As a result, processing unevenness occurs in the photosensitive material.

In a processing apparatus of the type in which a photosensitive material is nipped and conveyed by the heating roller and a pressing roller rotating in contact with the heating roller, only a part of the pressing roller is constantly heated by the heating roller and pressed. Therefore, there is a problem that the pressing roller is deformed.

As a solution to this problem, it is conceivable to keep the heating roller constantly rotating, but this is not preferable because wasteful power is consumed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and can always maintain the entire surface of a heating roller at a uniform temperature. Even when a pressing roller is used, It is an object of the present invention to provide a photosensitive material processing apparatus capable of preventing the deformation.

[0010]

According to a first aspect of the present invention, there is provided a processing liquid supply section for supplying a processing liquid to a photosensitive material, and a photosensitive material disposed before the processing liquid supply section and before supplying the processing liquid. A heating roller for pre-heating the photosensitive material, wherein the heating roller continuously rotates during processing of the photosensitive material, and intermittently rotates during standby, and the heating control means; The roller is provided with temperature control means for maintaining a constant temperature during processing of the photosensitive material and during standby.

According to a second aspect of the present invention, in the first aspect of the present invention, the rotation control means controls the stop angle position of the heating roller during the intermittent rotation so as not to be the same angle position.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a pressing roller for pressing the photosensitive material against the heating roller by rotating in contact with the heating roller is further provided. ing.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram of a lithographic printing plate making apparatus provided with a photosensitive material processing apparatus according to the present invention.

This plate making apparatus uses a lithographic printing plate M using a silver complex salt diffusion transfer method (DTR method) as a photosensitive material.
The lithographic printing plate M is subjected to image exposure and development processing. The exposure apparatus 2 performs exposure to the lithographic printing plate M, and performs the development processing to the exposed lithographic printing plate M. And a development processing device 3.

A lithographic printing plate using a silver complex salt diffusion transfer method (DTR method), particularly a lithographic printing plate having a physical development nucleus layer on a silver halide emulsion layer is disclosed in, for example, US Pat. No. 3,728. No. 4,114,769, No.4,160,670, No.4,336,321, No.4,501,811, No.4,510,228, No.4,621,041 The exposed silver halide is subjected to chemical development by DTR development to become black silver to form a hydrophilic non-image area, while the unexposed silver halide crystal is The silver salt complexing agent in the developer forms a silver complex and diffuses to the physical development nucleus layer on the surface. Form.

First, the configuration of the exposure apparatus 2 will be described. The exposure device 2 exposes the image of the original to the lithographic printing plate M by projecting the reflected light from the original mounted on the original holder 12 onto the surface of the lithographic printing plate M by the projection optical system 13. is there.

The original holder 12 has a light transmitting plate 14 for placing an original and an upper lid 15 which can be opened and closed with respect to the light transmitting plate 14. 1, it is configured to be reciprocally movable in the left-right direction between a position indicated by a solid line and a position indicated by a two-dot chain line. Further, the projection optical system 13 is fixed below the reciprocating movement path of the original holder 12, and a rod-shaped light source 17 for irradiating illumination light to the surface of the original horizontally moved while being held by the original holder 12; The apparatus includes a plurality of folding mirrors 18 for guiding light reflected from a document by the light source 17 and a projection lens 19 for projecting the reflected light guided by the plurality of folding mirrors 18 onto a lithographic printing plate M.

When exposing an image of a document on the lithographic printing plate M by the exposure device 2, the document holder 12 is arranged at a position shown by a solid line in FIG. The original is mounted on the original holder 12 by closing the upper cover 15 after placing the original. Then, with the light source 17 turned on, the document holder 12 is moved to the left in FIG. In synchronization with this, the leading end of the lithographic printing plate M wound in a roll by the plurality of transport rollers 22 and the guide member 23 is moved to the original holder 1.
2 is conveyed at the same speed as the moving speed. As a result, the document held in the document holder 12 is sequentially irradiated with light from the light source 17. Then, the reflected light from the original is irradiated onto the surface of the lithographic printing plate M moving at the same speed as the original holder 12 via the plurality of folding mirrors 18 and the projection lens 19, and the image of the original is printed on the lithographic printing plate M. Exposed.

The lithographic printing plate M to which the image has been exposed is sequentially transported from the exposure device 2 to the subsequent development processing device 3 for processing. Further, a cutting device 25 having a cutter 24 that moves in a direction perpendicular to the transport direction of the lithographic printing plate M is disposed on the exit side of the exposure device 2. Cut at the rear end of the exposed part.

Since the transport speed of the lithographic printing plate M in the exposure device 2 is lower than the transport speed of the lithographic printing plate M in the developing device 3, the lithographic printing plate M is simply transferred to the exposure device 2 and the developing device 3. Cannot be conveyed. When the lithographic printing plate M is cut by the cutting device 25, it is necessary to stop the transport of the lithographic printing plate M. For this reason, a lithographic printing plate M buffer unit 26 is provided between the exposure device 2 and the development processing device 3, and when the lithographic printing plate M that has been exposed in the exposure device 2 is transported, the buffer unit 26 By stopping the rotation of the pair of rollers 27 and 28 disposed for a certain period of time, the lithographic printing plate M is stored in the buffer unit 26 for a certain length, and then conveyed to the developing device 3. ing.

Next, the structure of the developing apparatus 3 according to the present invention will be described. FIG. 2 is an enlarged schematic view showing the developing device 3 in FIG. 1, and FIG. 3 is an outline diagram showing a piping system thereof.

The developing unit 3 applies a developing solution (activator) to the exposed lithographic printing plate M and develops the lithographic printing plate M, and a developing solution (stabilizer) to the developed lithographic printing plate M. Stabilizer 33 for applying and stabilizing
And a drying unit 34 for drying the lithographic printing plate M after the stabilization process.

The developing section 32 includes a roller 2 of the buffer section 26.
Lithographic printing plate M conveyed to developing section 32 by 7, 28
A pair of introduction rollers 41 and 42 for nipping and transporting the developer, and a developer application for measuring and applying a fixed amount of the developer to the photosensitive surface of the lithographic printing plate M transported by the pair of introduction rollers 41 and 42 A mechanism 43 and a pair of squeezing rollers 4 for removing the developer supplied to the developing process from the lithographic printing plate M;
4, 45, and a plurality of guide members 46, 47, 48, 49, 50 for guiding the lithographic printing plate M.

The lower roller 41 of the pair of introduction rollers 41, 42 is a heating roller having a built-in heater for heating the lithographic printing plate M passing therethrough.
The upper roller 42 is a pressing roller that presses the planographic printing plate M against the heating roller 41. The lithographic printing plate M is heated in advance prior to the development process because a small amount of a temperature-controlled developer is applied to the lithographic printing plate M and the lithographic printing plate M is heated by the heat capacity of the lithographic printing plate M when developing. This is to prevent the temperature of the developer contacting the plate M from decreasing. The configurations of the heating roller 41 and the pressing roller 42 will be described later in detail.

As shown in FIG. 3, the developing solution application mechanism 43 is connected to a developing solution tank 52 for storing a developing solution via a pump 53. A collection tray 54 is provided below the developer application mechanism 43. The developing solution in a developing solution tank 52 is pumped by a pump 53 to a developing solution application mechanism 43.
And supplied onto the lithographic printing plate M. Then, the developer not applied to the lithographic printing plate M, such as the developing solution flowing out from both ends and the rear end of the lithographic printing plate M, is collected on a collecting tray 5.
4. Drop on top. Further, since this developer can be reused, the collection tube 5 provided at the lower end of the collection tray 54 is provided.
5, the liquid is dropped into the liquid receiving portion 56 of the developer tank 52 and collected in the developer tank 52. The developer tank 52 has a built-in panel heater 57 and is configured to maintain the developer circulating in the developer circulation path from the developer tank 52 to the developer application mechanism 43 at a predetermined temperature. ing.

A collection tray 58 is provided below the pair of squeezing rollers 44 and 45. The fatigue developing solution removed from the lithographic printing plate M by the pair of squeezing rollers 44, 45 passes through the collecting hole 63 of the liquid receiving member 62 provided below the pair of squeezing rollers 44, 45, and the collection tray 5
8 is dropped. Further, since this developer cannot be reused, it is discharged to the drainage tank 64 via the collection pipe 59 provided at the lower end of the collection tray 58.

As shown in FIG. 4, the developing solution application mechanism 43 has a developing solution supply pipe 122 having a plurality of discharge holes 121 formed thereunder, and a plurality of developing solution supply pipes 122 for flowing the developing solution down to the lower end thereof. Developer receiving portion 124 having opening 123
A coating roller 125 having a plurality of grooves on its surface and rotating in contact with the lithographic printing plate M; and a diffusion for guiding the developer flowing down from the opening 123 of the developer receiving portion 124 to the coating roller 125. The film 126 and the developer receiving section 12
4 has a backflow prevention film 127 for preventing backflow of the developer flowing down from the opening 123, and a backup roller 128 abutting on the application roller 125. In addition,
Arrows in FIG. 4 indicate the transport direction of the lithographic printing plate M.

The developing solution supply pipe 122 is connected to the developing solution tank 52 via the pump 53, and the developing solution is discharged from the plurality of discharge holes 121 by driving the pump 53. After the developer is once received by the developer receiving section 124, the diffusion film 12
Flow down to 6. Opening 12 of developer receiving section 124
The developer flowing down from 3 is temporarily stored in the contact portion between the application roller 125 and the diffusion film 126 and is diffused in a direction orthogonal to the transport direction of the lithographic printing plate M. Then, with the rotation of the application roller 125, the developer passes through the opening formed by the groove of the application roller 125 and passes through the application roller 125.
Move in the direction of the contact portion between
A reservoir is formed there.

When the lithographic printing plate M passes through the liquid reservoir, a developing solution is applied to the photosensitive surface of the lithographic printing plate M. At this time, since the photosensitive surface of the lithographic printing plate M is pressed against the surface of the application roller 125 by the backup roller 128, the developer applied to the photosensitive surface of the lithographic printing plate M is opened by the groove of the application roller 125. It is weighed to a certain amount by the part. Therefore, the backup roller 128
Printing plate M that has passed the contact portion between
A constant amount of developer required for development is always applied to the photosensitive surface.

The stabilizing section 33 is provided with a stabilizing liquid applying mechanism 73 for measuring and applying a constant amount of a stabilizing liquid to the photosensitive surface of the lithographic printing plate M conveyed from the developing section 32 and a stabilizing process. The lithographic printing plate M includes a pair of squeezing rollers 74 and 75 for removing the stabilizing liquid from the lithographic printing plate M, and a plurality of guide members 76, 77 and 78 for guiding the lithographic printing plate M.

As shown in FIG. 3, the stabilizing liquid application mechanism 73 is connected via a pump 83 to a stabilizing liquid tank 82 for storing the stabilizing liquid. A collection tray 84 is provided below the stable liquid application mechanism 73. The stable liquid in the stable liquid tank 82 is supplied to the stable liquid applying mechanism 73 by the pump 83.
And supplied onto the lithographic printing plate M. Then, the stabilizing liquid that has not been applied to the lithographic printing plate M, such as the stabilizing liquid flowing out from both ends and the rear end of the lithographic printing plate M, is dropped onto the collection tray 84 because it can be reused. Further, the stable liquid drops into the liquid receiving section 86 of the stable liquid tank 82 via the recovery pipe 85 provided at the lower end of the recovery tray 84, and is collected in the stable liquid tank 82.

A collection tray 88 is provided below the pair of squeezing rollers 74 and 75. The stable liquid removed from the lithographic printing plate M by the pair of squeezing rollers 74 and 75 is dropped onto the collection tray 88 via the collection holes 93 of the liquid receiving member 92 provided below the pair of squeezing rollers 74 and 75. I do. Further, since this stable liquid cannot be reused, it is discharged to the drainage tank 64 via a collecting pipe 89 provided at the lower end of the collecting tray 88.

As shown in FIG. 5, the stabilizing liquid application mechanism 73 includes a stabilizing liquid supply pipe 132 having a plurality of discharge holes 131 formed below the stabilizing liquid supply pipe 132, and a plurality of stabilizing liquid supply pipes for flowing the stabilizing liquid downward at the lower end thereof. A stable liquid receiving portion 134 having an opening 133 formed therein.
A coating roller 135 whose surface is formed of a single-cell sponge and rotates in contact with the lithographic printing plate M; and an opening 133 of the stable liquid receiving portion 134 whose surface is formed in an uneven shape.
Film 136 for guiding the stable liquid flowing down from the coating roller 135 to the coating roller 135 and the lithographic printing plate M with the coating roller 1
And a leaf spring 138 that urges the plate spring 335. In addition,
Arrows in FIG. 4 indicate the transport direction of the lithographic printing plate M.

The stable liquid supply pipe 132 is connected to the above-mentioned stable liquid tank 82 via a pump 83, and the stable liquid is discharged from the plurality of discharge holes 131 by driving the pump 83. After the stable liquid is once received by the stable liquid receiving section 134, the diffusion film 13 passes through the plurality of openings 133.
Flow down to 6. Opening 13 of stable liquid receiving portion 134
The stable liquid flowing down from 3 is temporarily stored in a contact portion between the application roller 135 and the diffusion film 136, and is diffused in a direction orthogonal to the transport direction of the lithographic printing plate M. Then, with the rotation of the application roller 135, the stable liquid passes through the opening formed by the unevenness on the surface of the diffusion film 136, moves toward the contact portion between the application roller 135 and the leaf spring 138, and stores the liquid therein. Form.

When the lithographic printing plate M passes through the liquid reservoir, a stable liquid is applied to the photosensitive surface of the lithographic printing plate M. At this time, since the photosensitive surface of the lithographic printing plate M is pressed against the surface of the application roller 135 by the leaf spring 138, the stable liquid applied to the photosensitive surface of the lithographic printing plate M is a single bubble on the surface of the application roller 135. It is metered to a constant volume by a number of holes with a sponge. Therefore, a constant amount of the stabilizing liquid required for stabilization is always applied to the photosensitive surface of the lithographic printing plate M that has passed through the contact portion between the leaf spring 138 and the application roller 135.

The leaf spring 138 has an overflow hole 137 for storing a stable liquid more than necessary at a contact portion between the leaf spring 138 and the application roller 135 to prevent the liquid reservoir from becoming excessively large. Is provided.

The drying unit 34 includes a rubber roller 102 that supports and transports the lithographic printing plate M transported from the stabilizing unit 33,
A mirror roller 103 for preventing uneven drying of the lithographic printing plate M by contacting the rubber roller 102 with a predetermined pressure;
Cleaning liquid reservoir 104 for supplying the cleaning liquid via
A drying mechanism 107 having a fan 105 and a heater 106 for blowing hot air onto the lithographic printing plate M to dry it, and a plurality of transport rollers 108 for transporting the lithographic printing plate M;
09 and 110. The cleaning liquid storage unit 104 is provided as shown in FIG.
As shown in FIG.
The cleaning liquid supply pipe 105 for supplying the cleaning liquid to the cleaning liquid 4 and 45 is connected to the cleaning liquid supply pipe 105 via a pump 106.

The development processing of the planographic printing plate M by the development processing device 3 is performed as follows.

That is, the lithographic printing plate M on which an image has been recorded by the exposure device 2 at the former stage is placed on a pair of introduction rollers 41 and 4.
The developing solution is applied by the developer application mechanism 43 to apply an amount of the developing solution necessary for developing the lithographic printing plate M.
The lithographic printing plate M to which only the developing solution necessary for the developing process is applied is supplied from the developing solution applying mechanism 43 to the pair of squeezing rollers 4.
The developing process is completed on the photosensitive surface while being transported through the space developing section reaching to 4, 45. And the lithographic printing plate M
The developing solution adhered to the developing process and removed by the pair of squeezing rollers 44 and 45 is removed. Subsequently, the lithographic printing plate M is applied with a stabilizing solution application mechanism 73 with an amount of stabilizing solution necessary for stabilizing the lithographic printing plate M. The lithographic printing plate M to which only the necessary amount of the stabilizing liquid for the stabilizing process is applied is stabilized while being conveyed to the pair of squeezing rollers 74 and 75, and the stabilizing process attached to the lithographic printing plate M is performed. Is removed by the pair of squeezing rollers 74 and 75. Then, the lithographic printing plate M for which the stabilization process has been completed.
After the unevenness of drying is prevented by being pressed by the mirror surface roller 103, the drying is performed by the drying mechanism 107 and discharged onto the discharge tray 29 shown in FIG.

In this developing apparatus 3, since only the amount of developing solution necessary for the developing process is applied to the lithographic printing plate M and the developing process is performed, the amount of the developing solution required for the process can be reduced. It becomes possible. Further, since a substantially unused processing liquid is supplied to the lithographic printing plate M, the lithographic printing plate M can always be uniformly processed.

Next, a description will be given of the heating roller 41 and its control mechanism, which are features of the present invention. FIG. 6 is a cross-sectional view illustrating a structure near the heating roller 41 and the pressing roller 42.

As shown in this figure, the heating roller 41 is formed of a stainless steel cylindrical body, and is rotatably supported by bearings 163 and 164 made of heat resistant resin. In addition, the bearings 163 and 164 are disposed in long holes formed in the pair of side plates 161 and 162, and the pair of side plates 161 and 164 are provided.
162 is supported in a vertically movable manner in FIG. Further, inside the heating roller 41, a heater 165 is disposed coaxially with the heating roller 41.

The pressing roller 42 disposed in contact with the heating roller 41 has a surface made of an elastic material such as rubber, and rotates on bearings 166 and 167 fixed to the pair of side plates 161 and 162. Supported as possible. A shaft 168 of the pressing roller 42 has a sprocket 169
The sprocket 169 is connected to a sprocket 173 of a drive motor 172 via a drive transmission mechanism 171 indicated by a virtual line in FIG.

The heating roller 41 and the pressing roller 4
2 are urged in directions approaching each other by urging means (not shown), and the lithographic printing plate M passing between them.
Are held at a constant nip pressure.

To heat the lithographic printing plate M, the motor 1 is heated while the heating roller 41 is heated by the heater 165.
The pressing roller 42 is rotated by 72. Accordingly, the heating roller 41 also rotates. Then, the lithographic printing plate M is heated by pressing the lithographic printing plate M against the heating roller 41. The driving motor 172 is connected to the developing device 3
Is a driving source for driving all the driving rollers for transporting the lithographic printing plate M, and the driving motor 172 is
During the development processing of the lithographic printing plate M, it is always rotating.

FIG. 7 is a block diagram showing a configuration of a control unit 180 for controlling the heater 165 and the drive motor 172.

The control unit 180 includes a CPU 174 and an R
An OM 175 and a RAM 176 are provided. The controller 180 is connected to the heater 165 and the drive motor 172 via the interface 177. The control unit 180 functions as a temperature control unit that controls the heater 165 to be always at the set temperature. Also,
The control unit 180 also functions as a rotation control unit that controls the driving of the driving motor 172 to control the rotation of the heating roller 41.

In such a configuration, the heater 165
After the power is turned on to the plate making device including the exposure device 2 and the development processing device 3, the lithographic printing plate M can be processed at any time even in a standby state in which the development processing of the lithographic printing plate M is temporarily stopped. So that it is always working. On the other hand, since the lithographic printing plate M is not transported during standby,
The heat roller 41 and the pressing roller 42 do not rotate.

As a result, since the heat from the heater 165 is intensively transmitted upward, only the upper surface of the heating roller 41 is more strongly heated, and the temperature distribution on the outer peripheral surface of the heating roller 41 becomes uneven. Therefore, when the development processing of the lithographic printing plate M is restarted, the lithographic printing plate M conveyed in contact with the heating roller 41 is heated in an uneven state. Processing unevenness occurs. Further, the pressing roller 4 in contact with the heating roller 41
Since only a part of 2 is constantly heated and pressed by the heating roller 41, the pressing roller 42 is deformed.

For this reason, the heating roller 41 and the pressing roller 42 are configured to rotate intermittently even in a standby state according to a command from the control unit 180. That is, in the standby state in which the development processing of the lithographic printing plate M is temporarily stopped, the heating roller 41 and the pressing roller 42 which are normally stopped are rotated for a short period of time at regular intervals under the control of the control unit 180. More specifically, after the drive motor 172 is driven for one second to rotate the heating roller 41 and the pressing roller 42 for one second in standby mode, the drive motor 172 is stopped for 60 seconds and the heating is performed. By repeating the intermittent rotation operation of stopping the rotation of the roller 41 and the pressing roller 42, a partial temperature rise of the heating roller 41, deformation of the pressing roller 42, and the like are prevented.

If the stop angle position of the heating roller 41 is always the same at the time of the intermittent rotation of the heating roller 41, the heating roller 41 is intermittently rotated even though the heating roller 41 is intermittently rotating. In some cases, the temperature distribution on the outer peripheral surface of the outer surface 41 becomes non-uniform. For this reason, the heating roller 41 is controlled by the control unit 180 so that the stop angle position during the intermittent rotation does not become the same angle position.

That is, since the transport speed of the lithographic printing plate M in this developing apparatus is 20 mm / sec, when the driving motor 172 is driven for 1 second as described above, the heating roller 41 and the pressing roller 42 Are moved by 20 mm. On the other hand, the outer peripheral length of the heating roller 41 is set to 78.5 mm.
For this reason, the heating roller 41 rotates and stops by about 91.7 degrees at each intermittent rotation, and the stop angle position differs every time. Therefore, it is possible to more effectively prevent the temperature distribution on the outer peripheral surface of the heating roller 41 from becoming uneven.

In the case of the above-described embodiment, the minimum distance between 20 (mm), which is the transport distance of the lithographic printing plate M per second, and 78.5 (mm), which is the length of the outer periphery of the heating roller 41, is used. Since the common multiple is 3140, the value obtained by dividing the minimum common multiple by the transport distance per second of the lithographic printing plate M is 157, and the heating roller 41 stops at the same angular position only after intermittently rotating 157 times. Will be. Thus, the transport distance per second of the lithographic printing plate M (that is,
When the moving distance of the outer peripheral surface of the heating roller 41 per second) is smaller than the outer peripheral length of the heating roller 41, the minimum of the transport distance per second of the planographic printing plate M and the outer peripheral length of the heating roller 41 is minimum. The value obtained by dividing the common multiple by the transport distance per second of the lithographic printing plate M is preferably larger, and is preferably at least 5 or more. When the transport distance per second of the lithographic printing plate M is larger than the outer peripheral length of the heating roller 41, the transport distance per second of the lithographic printing plate M is divided by the outer peripheral length of the heating roller 41. The above calculation may be performed by setting the surplus value as the transport distance per second of the lithographic printing plate M.

In the above embodiment, the case where the heating roller 41 is rotated via the pressing roller 42 has been described. However, the heating roller 41 may be directly driven by a motor or the like.

In each of the above-described embodiments, a silver complex salt diffusion transfer method (DTR method) is used as a photosensitive material.
Although the case where the lithographic printing plate M using is used has been described, the present invention can be applied to a photosensitive material processing apparatus using other various photosensitive materials.

[0056]

According to the first aspect of the present invention, since the heating roller is intermittently rotated during standby, the upper surface of the heating roller is more strongly heated, and the temperature distribution on the outer peripheral surface of the heating roller is reduced. Non-uniformity can be prevented. For this reason, it is possible to prevent processing unevenness due to the heating of the heating roller photosensitive material in an uneven state.

According to the second aspect of the present invention, since the stop angle position of the heating roller at the time of intermittent rotation does not become the same angle position, the temperature distribution on the outer peripheral surface of the heating roller becomes less uniform. It can be effectively prevented.

According to the third aspect of the present invention, since the photosensitive material is further provided with the pressing roller, the photosensitive material can be pressed against the heating roller to be heated more effectively. It is possible to effectively prevent deformation of the pressing roller caused by only the heating roller receiving the pressure.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a lithographic printing plate making apparatus.

FIG. 2 is a schematic diagram of a developing device 3;

FIG. 3 is a schematic diagram showing a piping system of the developing device 3;

FIG. 4 is a schematic view showing a developer application mechanism 43.

FIG. 5 is a schematic view showing a stable liquid application mechanism 73.

FIG. 6 is a cross-sectional view showing a structure near a heating roller 41.

FIG. 7 is a block diagram showing a control unit 180.

[Explanation of symbols]

 2 Exposure device 3 Developing device 32 Developing unit 33 Stabilizing unit 34 Drying unit 41 Heating roller 42 Press roller 43 Developing solution applying mechanism 73 Stabilizing solution applying mechanism 122 Developing solution supply pipe 125 Applying roller 128 Backup roller 165 Heater 172 Drive motor 180 Control Department

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Eiji Miyasaka, 480-1, Takamiyacho, Hikone, Shiga Prefecture Dainippon Screen Mfg. Co., Ltd. Hikone District Office (72) Masaharu Kimura 480, Takamiyacho, Hikone, Shiga 1 Dainippon Screen Mfg. Co., Ltd., in the Hikone area business establishment (72) Inventor Yasuhiro Kawaguchi 1 Dainippon Screen Mfg. Co., Ltd., in the Hikone area business establishment at 480 Takamiyacho, Hikone City, Shiga Prefecture

Claims (3)

[Claims] 1. A photosensitive material processing apparatus comprising: a processing liquid supply unit for supplying a processing liquid to a photosensitive material; and a heating roller disposed before the processing liquid supply unit for preheating the photosensitive material before supplying the processing liquid. A rotation control means for continuously rotating the heating roller during processing of the photosensitive material and intermittently rotating during standby, and controlling the heating roller to be constant during processing of the photosensitive material and during standby. A photosensitive material processing apparatus, comprising: temperature control means for maintaining a temperature. 2. The photosensitive material processing apparatus according to claim 1, wherein the rotation control means controls the stop angular position of the heating roller during the intermittent rotation so as not to be the same angular position. 3. The photosensitive material processing apparatus according to claim 1, further comprising a pressing roller that presses the photosensitive material against the heating roller by rotating while being in contact with the heating roller.