JPH0387832A - Device for processing photosensitive material - Google Patents

Abstract

PURPOSE:To uniformly rub the surface of a photosensitive layer and to eliminate unequal development by spirally winding long-sized brush on a shaft and disposing the shaft in a processing liquid. CONSTITUTION:The long-sized brush 66 made of a synthetic resin is wound around the shaft 64 to form the rubbing brush 62. This shaft 64 is disposed in the processing liquid and the unnecessary photosensitive layer is rubbed away by the brush. The outside diameter is reduced by this constitution, by which the wire diameter of the brush is reduced and the brush is less stiffened. The brush is thereby miniaturized and the damage of the surface of the photosensitive layer is prevented. The bending of the rear end of the photosensitive material is obviated and the uniform rubbing is possible. Further, the rubbing brush is formed by inserting the twisted brush into the grooves 72 provided on the shaft 70. The winding of the long-sized carpet brush spirally on the shaft 64 is equally effective.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a photosensitive material processing apparatus for processing a photosensitive material on which an image has been printed by transporting and immersing it in a processing liquid.

[Prior Art] A photosensitive material, such as a photosensitive lithographic printing plate, on which an image has been printed is sent to a photosensitive lithographic printing plate processing machine, which is a photosensitive material processing device, and is equipped with a photosensitive lithographic printing plate processing machine. After being developed in a developing tank and washed with water in a rinsing tank or washing tank, a finisher liquid is applied.

A developer is stored in the developer tank, and the photosensitive lithographic printing plate is conveyed and immersed into the developer tank to undergo development processing. While being transported and immersed in the developer, the unexposed portions of the image area on the surface of the photosensitive lithographic printing plate are rubbed off by a brush placed in the developer. As a result, a non-image area, which is an exposed area, is left and developed.

In general, in photosensitive materials that are developed by imagewise exposure, the irradiated areas harden to form image areas and non-image areas, and unnecessary areas of the photosensitive layer are rubbed off with a rubbing member such as a brush.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional photosensitive material processing apparatus, since the brush that scrubs the surface of the photosensitive material is formed by flocking to the shaft, the outer diameter becomes thicker than 50 mmΦ.

The shaft also becomes thicker and is exposed to the outside from the surface of the processing liquid. Therefore, when this thick brush rotates, the processing liquid is pumped up and comes into contact with air, which causes the processing liquid to deteriorate.

Furthermore, the size of the developing tank in which this thick brush is placed becomes large.

In addition, if a flocked brush with an outer diameter of 50 mm or less is made forcibly, the brush becomes stiff and may damage the surface of the photosensitive material or kick up the rear end of the photosensitive material and bend the rear end of the photosensitive material. There's a problem.

It has also been proposed to use a channel brush (formed by supporting bristles in elongated channels) instead of a bristle brush. However, since this channel brush is manufactured by winding a channel spirally around a shaft, a gap corresponding to the width of the channel is created between the wound brushes. For this reason, the surface of the photosensitive material cannot be rubbed uniformly, resulting in uneven development of the photosensitive material.

In consideration of the above facts, the present invention provides a photosensitive material processing device that is small and capable of uniformly rubbing the surface of the photosensitive layer without damaging the surface of the photosensitive layer or bending the rear end of the photosensitive material. The purpose is to

[Means for solving the problem] In order to achieve the above object, the invention described in claim <1) provides the following:
The scrubbing brush is characterized in that a long brush made of synthetic resin is spirally wound around a shaft, and the shaft is placed in the processing liquid.

Further, the invention according to claim (2) is characterized in that the scrubbing brush is formed by inserting and winding a screw rib run into a spiral groove provided in the shaft.

Further, the invention according to claim (3) is characterized in that a long fibrous brush is spirally wound around the shaft to form a scrubbing brush.

[Function] According to the invention described in claim (1), the image-exposed photosensitive material is automatically transported and immersed in the processing liquid. During this immersion, the unnecessary photosensitive layer on the photosensitive surface side of the photosensitive material is rubbed off with a brush, and the photosensitive material is processed.

The brush that rubs the photosensitive layer of the photosensitive material is formed by winding an elongated synthetic resin brush around a shaft in a spiral manner, so that the outer diameter and brush wire diameter can be made small and the brush stiffness is also weak. This makes the brush small and does not damage the surface of the photosensitive layer.

Furthermore, since the brush is less stiff, the rear end of the photosensitive material is not bent.

Furthermore, since the elongated brush is tightly wound, the photosensitive layer of the photosensitive material can be uniformly rubbed, and uniform processing can be achieved.

Further, in the invention of claim (2), the scrubbing brush is formed by inserting a screw rib run into a groove provided in the shaft. This makes it possible to make the brush smaller and to reduce the wire diameter of the brush, which makes the brush weaker and makes it possible to scrape off unnecessary photosensitive layers without damaging the surface of the photosensitive layer of the photosensitive material. Further, since the brushes formed in this manner do not have gaps between the brushes due to channels as in the conventional brushes, the photosensitive material can be processed uniformly.

In the invention of claim (3), the scrubbing brush is formed by winding a long fibrous brush in a spiral manner around the shaft. As a result, it is possible to make the brush smaller, and the wire diameter of the brush can be reduced, making the brush weaker and allowing unnecessary photosensitive layers to be scraped off without damaging the surface of the photosensitive layer of the photosensitive material. Furthermore, since the brushes formed in this manner are tightly wound around the shaft, gaps due to channels do not occur between the brushes as in the conventional brushes, so that the photosensitive material can be processed uniformly.

[Effects of the Invention] The present invention having the above structure is compact, and the surface of the photosensitive layer can be uniformly rubbed without damaging the surface of the photosensitive layer or bending the rear end, and uniform development processing can be achieved. The excellent effect of being able to do this can be obtained.

[Embodiment] FIG. 1 shows an embodiment of a photosensitive lithographic printing plate processor 10, which is an example of a photosensitive material processing apparatus according to the present invention.

The photosensitive planographic printing plate processor 10 includes a first developer tank 14 for developing a photosensitive planographic printing plate (hereinafter referred to as "25th plate") 12 on which an image has been printed by a printing device (not shown), and a 23rd plate 1.
a second developer tank 16 that performs auxiliary development processing on the PS plate 12; an overflow tank 18 disposed between the first developer tank 14 and the second developer tank 16; and a finisher tank 20 that applies finisher liquid to the PS plate 12. are provided.

1st developer tank> As shown in FIG.
A pair of conveyance rollers 22 is arranged on the insertion side of the paper. The 23rd plate 12, on which an image has been printed by a printing device (not shown), is inserted between the pair of conveying rollers 22, and the inserted 23rd plate 12 is sent into the photosensitive planographic printing plate processor 10.

The first developer tank 14 has an approximately inverted mountain shape with an open top and a bottom central portion protruding downward.

A developer 24 is contained within the first developer tank 14 . Inside the first developing tank 14, guide rollers 26, 28, 30, 32, 34, 36, 38 having the same diameter are arranged along the bottom wall. These guide rollers 26 to 38 form skewer-shaped rollers in which a plurality of elastic rotating members are pivotally supported on the outer periphery of the shaft, and the shaft is supported by being stretched between a pair of side plates (not shown). .

Further, an idle roller 40 having a larger diameter than the guide roller 26 is arranged above the guide roller 26, a guide roller 42 is arranged above the guide roller 36, and a guide roller 42 is arranged above the guide roller 36.
A guide roller 44 is arranged above the roller 8 . These guide rollers 40, 42, 44 are the guide rollers 26
- 38, it is supported by a pair of side plates (not shown).

A pair of transport rollers 46 is arranged between the guide rollers 30 and 32 in the center of the first developer tank 14 . This conveyance roller pair 46 is supported by a pair of side plates (not shown), and is rotated by the driving force of a driving means (not shown) transmitted thereto.

A guide roller 48 having a larger diameter than the guide roller 30 is arranged between the conveyance roller 46 and the guide roller 30.

This guide roller 48 is a skewer-shaped roller and the guide roller 2
Similar to 4-38, it is supported by a pair of side plates. A guide 52 is attached to the shaft of the guide roller 48 via a bracket 50. One end of this guide 52 is fixed to the bracket 50, and the other end is arranged toward the pair of conveying rollers 46. As a result, the 23rd plate 12 is guided between the conveyance rollers 46.

Therefore, the 23rd printing plate 12 sent into the first developer tank 14 by the conveying roller pair 22 is inserted between the guide roller 24 and the guide roller 40, and the guide roller 28, 30, 48
The paper is guided by the guide 52 and is inserted between the pair of transport rollers 46 by the guide 52 . After passing through the pair of transport rollers 46, it is guided by guide rollers 32, 34, 36, 42, 38 and rises obliquely, and is guided by guide rollers 44 and sent onto the overflow tank 18. As a result, the 23rd plate 12 is immersed in the developer in the first developer tank 16 and developed.

The guide roller 32 is formed by a plurality of elastic rotating members pivotally supported on the outer periphery of a spray vibrator 54 in which a plurality of discharge ports are formed along the axial direction.

This spray vibe 54 is communicated with one end of a conduit 56. The other end of the conduit 56 passes through the bottom of the second developer 16 and opens into the second developer tank 16 .

A supply pump 58 (P7→) is disposed in the middle of the conduit 56, and the developer 24 in the second developer tank 16 is supplied to the spray vibe 54.

Further, a spray pipe 60 is arranged above the guide roller 32. The spray pipe 60 is provided with a plurality of discharge ports opening toward the conveying roller pair 46 along the axial direction. This spray pipe 60 is also in communication with the pipeline 56, and the developer 24 in the second developer tank 16 is
is supplied by supply pump 58.

A brush 62 is arranged between the spray pipe 60 and the guide roller 42. This brush 62 has a rotating shaft 64 rotatably supported by a side plate (not shown), and is rotated by the driving force of a driving means (not shown) transmitted thereto.

As shown in FIG. 2, the brush 62 includes a long fibrous brush 66 that is spirally wound around a rotating shaft 64 with a nylon sheet 68 interposed therebetween and bonded thereto.

This fibrous brush 66 is made of nylon, ETEF, PPS, P
It is molded from P etc. Also, the outer diameter is 40mmΦ or less.
5 to 40 mm Φ is preferable, and the wire diameter of 66 of the fibrous brush is 2
It is set to 0 to 70μ.

Further, the rotation speed of the fibrous brush 66 is set to 300 rpm or less, and preferably 60 to 20 rpm.

Further, the brush 62 has a spiral groove 72 provided in the rotating shaft 70 as shown in FIG.
4 may be inserted and wound. In this case, the screw rib run 74 shown in FIG. 4 is a brush with bristles 76 fixed to two wire rods, and when the wire rod of this screw rib run is inserted into the groove 72, the hairs are scattered approximately evenly to the outside of the groove 72 and protrude.
The radially arranged bristles are arranged approximately evenly around the rotating shaft 70. This screw rib run is made of the same material as the fibrous brush 66 described above.

As shown in FIG. 1, a brush 6 is provided at the bottom of the conveyance path of the 23rd plate 12 between the guide roller 36 and the guide roller 38.
A brush 78 having the same configuration as 2 is arranged.

A scraping prevention plate 80 is provided on the guide roller 42 side of the brush 62.
is located. This vignetting prevention plate 80 has a brush 62
This prevents the rear end of the 23rd plate 12 passing between the guide roller 36 and the guide roller 36 from being vignetted. Furthermore, a scratch prevention plate 82 is arranged between the brush 78 and the guide roller 38.

This vignetting prevention plate 82 is similar to the vignetting prevention plate 80.
This prevents the rear end of the plate 12 from being vignetted.

A pipe line 84 that communicates with the bottom of the overflow tank 18 opens above the first developer tank 14 . A pump (ps') 86 is disposed in the middle of this conduit 84.

Further, a pipe line 90 communicating with the water supply tank 88 is opened above the first developer tank 14, and a water supply pump 92 (P2) is disposed in the middle of this pipe line 90. This water supply pump 92 is connected to a conductivity replenishment controller 176, which will be described later. As a result, the timing of water supply to the first developer tank 14 is controlled.

Further, one end of a conduit 94 is connected to the lower part of the first developing tank 14 . A conductivity detector 96 (S
), a circulation pump 98, and a filter 100(F) are arranged, and the other end is communicated again to the lower part of the first developer tank 14. Therefore, the operation of the circulation pump 98 causes the first
The developer 24 stored in the lower part of the developer tank 14 is connected to the conduit 9.
After passing through the conductivity detector 96 and the filter 100, it is sent into the first developer tank 14 again. As a result, the conductivity of the developer 24 is detected, dust in the developer 24 is removed, and the developer 24 in the first developer tank 14 is stirred.

Further, the conductivity detector 96 detects the developer 24 passing through the pipe line 94 by a conductivity replenishment controller 176, which will be described later.
The conductivity of the developer 24 in the first developing tank 14 is detected, and the detection result is transmitted to the conductivity replenishment controller 176.

Further, a liquid level lid 102 is arranged above the first developing tank 14 . The movement of the liquid level lid 102 in the transport direction of the 23rd plate 12 is regulated by a stopper (not shown), but the movement in the liquid level height direction is not regulated. Therefore, the amount of developer 24 in the first developer tank 14 decreases, and the amount of developer 24 in the first developer tank 14 decreases.
When the liquid level decreases, the liquid level lid 102 lowers to follow this decrease. The liquid level lid 102 thus prevents deterioration of the developer caused by the developer absorbing carbon dioxide gas in the air and neutralizing alkaline components in the developer. It also prevents the developer from evaporating.

Further, a guide cover 104 for beam entry is arranged above the first developing tank 14. This guide cover 104
After the development process, it jumps over the first developer tank 14 and goes to the second developer tank 16 for performing the development process and finisher process again.
Insert the 23rd edition 12 inside.

<Overflow tank> The upper part of the side wall of the first developer tank 14 on the overflow tank 18 side is bent toward the overflow tank 18 side, and the developer 24 in the first developer tank 14 overflows the upper part of this side wall and flows into the overflow tank 18. It is collected inside.

A pair of conveying rollers 106 is arranged at the upper part of the side wall that partitions the overflow tank 18 and the second developer tank 16. These transport roller pairs 106 are rotatably supported by a side plate (not shown), and are rotated by the driving force of a driving means (not shown) transmitted thereto. The 23rd printing plate 12 sent out from between the guide rollers 38 and 44 is inserted between the pair of transport rollers 106.

The conveyance roller 106 located on the upper side has a small diameter roller 10.
8 are placed in contact with each other. This roller 108 is connected to the developer 24 in the second developer tank 16 adhering to the conveyance roller 106.
is prevented from entering the overflow tank 18.

Further, the transport roller 106 located further below has an overflow tank 18 and a roller 110.1 inside the second developer tank 16.
12 are arranged in contact with each other. The roller 110 is carried out by the 23rd printing plate 12 in the first developer tank 14 to prevent the developer 24 adhering to the transport roller 106 from entering the second developer tank 16 . Further, the roller 112 prevents the developer in the second developer tank from entering the overflow tank 18.

Inside the overflow tank 18 is a conduit 114 that penetrates the bottom.
One end of the pipe 114 extends from the bottom to a predetermined height, and the height of the developer in the overflow tank 18 is determined by the height of the pipe 114 from the bottom. The other end of this conduit 114 opens into a drain tank 116 .

Second developer tank> At the top of the second developer tank 16, a pair of transport rollers 118 are arranged on the side of the finisher tank 20. These transport roller pairs 118 are rotatably supported by a side plate (not shown). The driving force of a driving means (not shown) is transmitted and rotates. A pair of conveyor rollers 10 is disposed between these pairs of conveyor rollers 118.
The 23rd edition 12 sent out from between 6 and 6 is inserted. As a result, the 23rd plate 12 is conveyed substantially horizontally above the second developing tank 16.

23 plate 12 between conveyance roller 106 and conveyance roller 118
A spray pipe 120 having the same configuration as the spray pipe 54 described above is arranged above the conveyance path. The outlet of the developer 24 of this spray pipe 120 is connected to the conveyor roller 1.
It is opened toward the 06 side, and discharges the supplied developer between the conveyance roller 106 and the upper surface side of the 23rd plate 12. This spray pipe 120 is connected to one end of a conduit 122. The other end of the conduit 122 communicates with the bottom of the second developer tank 16, and a supply pump 124 is disposed in the middle. A developer 24 is stored in the lower part of the second developer tank 16, and the developer is supplied by the operation of the supply pump 124.
4 is supplied to the spray pipe 120. As a result, the developer 24 is discharged and applied onto the surface of the 23rd plate 12.

A kite roller 126 is disposed at the bottom of the conveyance path for the 23rd plate 12 in correspondence with the spray pipe 120. Like the guide roller 32, this guide roller 126 is a spray pipe 12 having a plurality of discharge ports formed along the axial direction.
A plurality of elastic rotating members are pivotally supported on the outer periphery of 8. This spray pipe 128 is in communication with the conduit 122, and the developer 24 is supplied by the operation of the supply pump 124.

A plurality of discharge ports are opened in the spray pipe 128 along the axial direction between the conveyance roller 118 and the back side of the 23rd printing plate 12. The developer 24 thus supplied is discharged and applied to the back side of the 23rd plate 12.

One end of a conduit 130 is communicated with the bottom of the second developer tank 16 . The other end of the pipe line 130 is connected to a developing solution tank 132. A stock solution supply pump 1 is located in the middle of the pipe line 130.
32 (P,) are arranged. This stock solution supply pump 1
32 is connected to a processing replenishment controller 164, which will be described later, and its operation is controlled.

Further, one end of a conduit 134 is communicated with the bottom of the second developing tank 16 . The other end of the pipe line 134 is connected to a water supply tank 88. A water supply pump 136 is arranged in the middle of the pipe line 134. This water supply pump 136 (P3) is connected to the conductivity replenishment controller 176 and the processing replenishment controller 164, and their operations are controlled.

Further, one end of a conduit 138 passes through the bottom of the second developer tank 16 and projects into the second developer tank. This second developing tank 16
The height of the inward protrusion sets the level of the developer in the second developer tank 16 . The other end of the pipe line 138 opens to a drain tank 140, and the developer that has overflowed the pipe line 138 is discharged.

Finisher tank> A partition plate 142 is provided on the side wall that partitions the second developer tank 16 and the finisher tank 20.
This prevents the developing solution adhering to the pair of transport rollers 118 from mixing into the finisher solution in the finisher tank 20.

A pair of conveyor rollers 144 is arranged on the exit side in the upper part of the finisher tank 20.
is rotatably supported by a side plate (not shown), and is rotated by the driving force of a driving means (not shown) transmitted thereto. The conveyance roller pair 144 is arranged at a slightly lower position than the conveyance roller 118. A pair of conveying rollers 11 is provided between the pair of conveying rollers 144.
The 23rd edition 12 sent out from between 8 and 8 is inserted. As a result, the 23rd plate 12 is transported with the upper part of the second developing tank 16 tilted.

23 plate 1 between the conveying roller pair 118 and the conveying roller 144
A spray pipe 146 having the same configuration as the spray pipe 54 described above is arranged above the conveyance path No. 2. A discharge port of the developer 24 of this spray pipe 146 is opened toward the conveyance roller 144 side, and the developer 24 supplied thereto is
4 is discharged between the conveyance roller 144 and the upper surface side of the 23rd plate 12.

This spray pipe 146 is connected to one end of a conduit 148. The other end of the pipe line 148 is communicated with the bottom of the finisher tank 20, and a supply pump 150 is disposed in the middle. A finisher liquid 152 is stored in the lower part of the finisher tank 20, and a supply pump 150
This finisher liquid 152 is supplied to the spray pipe 146 by the operation of. This allows the finisher to
The liquid 152 is discharged onto the surface of the 23rd plate 12 and applied.

A finisher liquid coating box 154 is arranged at the bottom of the conveyance path for the 23rd plate 12 in correspondence with the spray pipe 146 . The finisher liquid application box 154 has a substantially U-shaped cross section, and an opening 154A is formed toward the top. A spray pipe 156 is arranged within the finisher liquid application box 154. Similar to the spray pipe 146, this spray pipe 156 has a plurality of discharge ports formed along the axial direction toward a corner inside the finisher liquid application box 154. This spray pipe 154 is in communication with a conduit 148, and when the supply pump 148 is operated, the finisher is sprayed.
Liquid 152 is supplied into finisher liquid application box 154 . The finisher liquid 152 supplied into the finisher liquid application box 154 overflows from the opening 154A and is applied to the back side of the 23rd plate 12 passing above.

One end of a conduit 158 is connected to the bottom of the finisher tank 20 . The other end of the pipe line 158 is connected to a finisher liquid tank 160. A stock solution supply pump 162 (P,) is arranged in the middle of the pipe line 158. This stock solution supply pump 162 is connected to a processing replenishment controller 164 to control its operation.

Further, one end of a conduit 166 is communicated with the bottom of the finisher tank 20. The other end of the pipe 166 is a water tank 88
is connected to. A water supply pump 1 is installed in the middle of the pipe 166.
68 (P3) is arranged. This water supply pump 136
is connected to the conductivity replenishment controller 176 and the process replenishment controller 164, and their operations are controlled.

Further, one end of a conduit 1170 passes through the bottom of the finisher tank 20 and projects into the finisher tank 20. The height of this protrusion into the finisher tank 20 sets the liquid level height of the finisher liquid in the finisher tf20. The other end of the pipe line 170 opens to a drain tank 172,
The developer that overflowed the pipe line 170 is discharged.

A detector 174 connected to the processing replenishment controller 164 is arranged on the insertion side of the transport roller pair 22. The detector 174 detects the passage time of the 23rd plate 12 at the insertion port of the photosensitive planographic printing plate processing machine 10, and detects the preset PS.
Using the processing speed of the plate and the width dimension of the PS plate, the processing replenishment controller 164 calculates the area of the 23 plate 12 to be inserted into the photosensitive planographic printing plate processor 10.

Further, the conductivity replenishment controller 176 is connected to the conductivity detector 9.
Based on the detection result in step 6, the water supply pump 136 and the stock solution supply pump 132 are operated to replenish the second developer tank 16 with the developer stock solution and water.

Next, the operation of this embodiment will be explained.

The 23rd plate 12 on which an image has been printed by a printing device (not shown) is inserted into the transport roller pair 22, and then inserted between the guide roller 40 and the guide roller 26 of the first developer tank 14.
It is sent into the first developer tank 14. This 23rd plate 12 is guided by guide rollers 28, 30, 48 and descends to the first
Sent to the center of development.

The large-diameter guide roller 52 guides the tip of the 23rd plate 12 without deviating from the predetermined conveyance path.
It functions to insert the leading end of the third plate 12 between the pair of conveying rollers 46.

The 23rd plate 12 inserted into the pair of conveying rollers 46 and sent out from the pair of conveying rollers 46 is moved by the guide rollers 32, 34, .
36, 42, 38, and 44, rises, and is sent out from the first developer tank 14.

The 23rd printing plate 12 is squeezed in the developer 24 in the first developer tank 16 when it is conveyed while being held by a pair of conveyor rollers 46, and immediately after that, the developer is sprayed by the spray pipes 54, 60. Further, the developer in the first developer tank 14 is circulated through the spray pipes 54 and 60.

Further, both sides of the 23rd plate 12 are rubbed by the brushes 62 and 78, and the swollen or dissolved unnecessary photosensitive layer is rubbed off, so that the 1st plate part 2 of the P'S plate is completely developed.

This brush 62.78 is made of synthetic resin and is formed of screw rib run or fibrous brush, so it has weak stiffness and 2
The photosensitive surface of the third plate 12 will not be damaged. Also, since the brushes 62 and 78 are formed with a small diameter, the rotating shaft 62 and 78
．． 70 is placed in a developer solution. As a result, the developer 24
Since contact with air is reduced, deterioration of the developer 24 is prevented, and the first developer tank 14 can be made smaller, thereby reducing costs.

Further, the developer 24 overflowing from the first developer tank 14 and discharged into the overflow tank 18 is transferred to the pipe 114.
from there into the discharge tank 116.

The developer 24 that overflows from the first developer tank 14 and is discharged into the overflow tank 18 passes through the pipe line 84 by the pump 86 and is supplied again into the first developer tank 14, so that the developer 24 can be effectively used. can be used.

The 23rd printing plate 12 sent out from the first developer tank 14 is pinched and transported by a pair of transport rollers 106 , the developer 24 is squeezed out, and the plate 12 is sent out between a pair of transport rollers 118 . The toner is sent out toward a pair of transport rollers 118 and transported in a substantially horizontal direction above the second developer tank 16 while being guided by guide rollers 126 .

During this conveyance, the developer 24 is discharged and coated onto both sides of the 23rd plate 12 by the spray pipes 120 and 128. As a result, the 23rd plate 12 is completely developed.

The developing solution in the first developing tank 14 becomes exhausted due to the development process of the 23rd plate 12, and this exhausted developing solution 24 is discharged from the overflow tank 18 through the pipe line 134 into the discharge tank 116.

Further, the developing stock solution and water are replenished into the second developing tank 16 by the processing replenishment controller 164.
6, the developer 24 is replenished into the first developer tank 14. As a result, the second developer 24 is applied in the second developer tank 16.
Since the third printing plate 12 has been developed in advance in the first developer tank 14, deterioration due to processing of the developer 24 in the second developer tank 16 is unlikely. Therefore, since the developer 24 in the second developer tank is supplied into the first developer tank 14, the developer can be used for a long period of time, and long-term running is possible.

Further, since the upper surface of the developer is covered by a liquid level lid 102, the developer is prevented from being deteriorated by air.

It also prevents the developer from evaporating.

Next, replenishment of the developer will be explained.

When a large number of 23 plates 12 are developed in the first developer tank 14, the developer becomes exhausted. The degree of fatigue of the developer can be determined by detecting the area of the 23 plate 12 to be processed by the detector 174, calculating it by the processing replenishment controller 164, and replenishing the developer to recover from the deterioration of the developer.

That is, the 23rd plate 12 inserted by the detector 174
Based on this detection result, the processing replenishment controller 164 calculates the operation time of the stock solution supply pump 132 and the water supply pump 136, and supplies the stock solution in order to supply a replenishment amount corresponding to the area of the plate 12. pump 132
, the water supply pump 136 is activated.

Further, the electrical conductivity of the developing solution 24 is detected by the electrical conductivity detector 96, and when the developing solution 24 is concentrated and the electrical conductivity increases and reaches a predetermined value or more, the electrical conductivity replenishment controller 176 is activated to supply water. The pump 92 is operated to supply the first developer tank 14 . Second development W! 18. The amount of water evaporated in the finisher tank 24 is also measured in advance, and the second
Developing water supply pump 136, finisher water supply pump 1
68 is activated. This water replenishment amount is 1Qcc ~ 1000
It is set to cc/times.

In addition, the finisher tank 20 includes a processing replenishment controller 1.
64, the finisher solution and water are replenished at a constant rate by the finisher stock solution supply pump 162 and the water supply pump 168.

This prevents the developer 24 and the finisher solution 152 from becoming concentrated, and in addition to the area replenishment, the activity of the developer solution 24 and the finisher solution 152 is kept constant, making it possible to perform stable development over a long period of time.

In this example, a photosensitive lithographic printing plate is shown as an example of the photosensitive material, but the present invention is not limited to this, and the present invention can be applied to a developing device for photosensitive recording materials such as a developing device for waterless planographic printing plates as other photosensitive materials. You can.

Further, in this embodiment, an example is shown in which the fibrous brush and the screw rib are used, but the brush is not limited to this, and any other brush with a weak stiffness may be used.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a photosensitive planographic printing plate processing machine according to the present invention, FIG. 2 is a perspective view showing a brush, and FIG.
The figure is a perspective view showing another example of the brush, and FIG. 4 is a cross-sectional view of the brush shown in FIG. 3 taken along the axial direction. 10... Photosensitive planographic printing plate processor, 12... Photosensitive planographic printing plate (PS plate), 14... First developer tank, 16... Second developer tank, 18... Overflow tank , 20... Finisher 24... Developer, 62.78... Brush, 64.70... Rotating shaft, 66... Fibrous brush, 74... Screwdriver run.

Claims (3)

[Claims] (1) A photosensitive material processing device that automatically transports and immerses image-exposed photosensitive material in a processing solution and processes it while rubbing it with a rubbing brush, in which a long synthetic resin brush is spirally moved toward the shaft. A photosensitive material processing apparatus characterized in that the rubbing brush is formed by winding the brush, and the shaft is disposed in the processing liquid so that the brush is disposed in the processing liquid. (2) A photosensitive material processing device that automatically transports and immerses a surface image-exposed photosensitive material in a processing solution and processes it while rubbing it with a brush, in which a screw rib run is inserted into a spiral groove provided on the shaft. A photosensitive material processing apparatus characterized in that the brush is formed by spirally winding the brush around the shaft. (3) A photosensitive material processing device that automatically transports and immerses an image-exposed photosensitive material in a processing solution and processes it while rubbing it with a brush, in which a long carpet brush is wound spirally around a shaft. A photosensitive material processing apparatus characterized in that the brush is formed.