JPH0581842U - Photosensitive material processing equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent deterioration of the processing solution. An automatic developing apparatus includes a tank body 1a of a developing tank 1 in which a processing liquid is stored, a conveying roller 13 for passing a printing plate into the processing liquid, a pair of squeezing rollers composed of a pair of rollers 21, and a diaphragm. And a processing liquid overflow groove 23 provided adjacent to the roller pair. The roller 21 of the squeezing roller pair has a contact portion located above the processing liquid surface in the tank body 1a, and discharges the printing plate from the tank body 1a while squeezing the developing solution on the printing plate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a photosensitive material processing apparatus having a processing liquid tank through which a photosensitive material passes.

[0002]

[Prior Art]

 Generally, a photosensitive material processing apparatus for developing a photosensitive film or a photosensitive printing plate (hereinafter referred to as a printing plate) is provided with a processing liquid tank in which a processing liquid is stored. The photosensitive material is developed by passing through the processing liquid tank by a conveying means composed of a large number of rollers. Then, the photosensitive material conveyed in the processing liquid tank passes between a pair of squeezing rollers composed of a pair of rollers, whereby excess processing liquid adhering to the surface of the photosensitive material is removed.

Further, the processing liquid tank is appropriately replenished with the processing liquid by a processing liquid replenishing means including a replenishing liquid tank and a replenishing pump. Further, in order to keep the amount of the processing liquid in the processing liquid tank constant, a processing liquid overflow portion (hereinafter referred to as an overflow portion) is provided on the side wall surface of the central portion of the processing liquid tank. The overflow portion opens on the side wall surface of the processing solution tank, and the excess processing solution is discharged from the opening to keep the level of the processing solution in the processing solution tank constant.

[0004]

[Problems to be solved by the device]

 In the conventional structure, the processing liquid squeezed from the photosensitive material by the pair of squeezing rollers returns to the processing liquid tank and diffuses as it is. Since the treatment liquid squeezed by the squeezing roller is particularly dirty, the contaminated treatment liquid in the above-mentioned conventional structure is diffused as it is into the treatment liquid in the treatment liquid tank, resulting in contamination of the treatment liquid. Deterioration becomes faster.

An object of the present invention is to suppress deterioration of the processing liquid.

[0006]

[Means for Solving the Problems]

 A photosensitive material processing apparatus according to the present invention includes a processing solution tank in which a processing solution is stored, a conveying means for passing a photosensitive material into the processing solution, a pair of squeezing rollers, and a squeezing roller. And an overflow portion provided adjacent to the pair. The contact portion of the pair of squeezing rollers is located above the processing liquid surface in the processing liquid tank, and the photosensitive material is discharged from the processing liquid tank while squeezing the processing liquid on the photosensitive material. .

[0007]

[Action]

 In the photosensitive material processing apparatus according to the present invention, the conveying means causes the photosensitive material to pass through the processing liquid in the processing liquid tank. From the photosensitive material that has passed through the processing liquid, the processing liquid is squeezed out by a pair of squeezing rollers. Here, since the overflow portion is provided adjacent to the squeezing roller pair, the highly contaminated processing liquid squeezed out from the photosensitive material by the squeezing roller pair is easily discharged to the outside from the overflow portion.

[0008]

【Example】

 FIG. 1 shows an automatic developing apparatus as an embodiment of the present invention. This automatic developing device comprises a developing tank 1 for developing a printing plate on which an image is printed by a printing device (not shown), a washing tank 2 for washing the developing solution adhering to the printing plate, and a rinsing plate. Or a rinse treatment tank 3 for performing a rinse / gum solution treatment.

The developing tank 1 has a tank body 1a for storing a developing solution, and a cover 1b for covering the tank body 1a from above. A large number of guide rollers 7, 8, 9, 10, 14, 17, 17, 18 for guiding the printing plate in the developing tank 1 are arranged in the tank body 1a. Further, between the guide roller 10 and the guide roller 14, a pair of conveying rollers 13 for nipping and conveying the printing plate is provided. A pair of squeezing rollers 21 are arranged in the tank main body 1a at the downstream end in the printing plate conveyance direction.

The lower squeezing roller of the pair of squeezing rollers 21 and 21 is in a state of being immersed in the developing solution except for the upper end portion thereof. Further, all of the upper squeezing rollers 21 are arranged above the developing solution. That is, here, at least a part of both diaphragm rollers 21 and 21 is exposed above the developing solution, and the contact portion thereof is arranged above the developing solution.

A pair of brush rollers 15 a and 15 b are arranged between the guide roller 14 and the guide roller 17. The brush rollers 15a and 15b are arranged so that they can be pressed against the printing plate from above and below. In FIG. 1, the upper brush roller 15a is clockwise and the lower brush roller 15b is counterclockwise. Rotate. One end of the discharge pipe 16 is connected to the center of the lower end of the tank body 1a. The other end of the discharge pipe 16 is connected to the suction side of the circulation pump 12. The discharge side of the circulation pump 12 is connected to the spray pipe 11 via a pipe 11a. The spray pipe 11 is arranged near the transport roller 13 in the tank body 1a. The developer can be sprayed from the spray pipe 11 toward the printing plate surface.

The discharge side of the circulation pump 12 is also connected to the spray 27. The spray 27 is arranged in the tank main body 1a near the lower brush roller 15b. The spray 27 discharges the developing solution downward. A developer replenishing pipe 25 is arranged below the spray 27 in the tank main body 1a. The discharge direction of the replenishing pipe 25 is generally directed to the brush roller 15b. One end of the replenishment pipe 25 is connected to a replenisher tank 26 via a replenishment pump 36.

A printing plate mounting table 4 is arranged on the upstream side of the developing tank 1 in the printing plate conveying direction (left side in FIG. 1). At the end of the mounting table 4 on the tank body 1a side, a guide roller 5 for preventing the trailing edge of the printing plate from rising and a pair of conveying rollers 6 for conveying the printing plate from the mounting table 4 to the tank body 1a side. And are arranged. Although not shown, a sensor for detecting whether the printing plate is inserted and the area of the printing plate is provided on the mounting table 4 below the guide roller 5.

In the water washing tank 2, a water spray 29, two pairs of conveying rollers 28 and 31 arranged with the water spray 29 sandwiched therebetween, and a guide roller with a spray function arranged below the water spray 29. And 30 are provided. Further, in the rinse treatment tank 3, a rinse spray 33, a guide roller 32 for guiding the printing plate from the transport roller 31, and a transport roller 34 for discharging the rinsed printing plate to the outside are arranged. ing.

Further, between the developing tank 1 and the water washing tank 2, the development, the water washing, and the rinsing treatment are once completed, and after that, the retouching printing plate requiring only the water rinsing and the rinsing treatment is applied. A bypass insertion port 24 for inserting the washing tank 2 is provided. An overflow groove 23 is provided below the bypass insertion port 24 and adjacent to the squeezing roller 21, so that the level of the developing solution in the tank main body 1a becomes constant. ing. A guide roller 22 is arranged above the overflow groove 23 and adjacent to the upper squeezing roller 21. Further, a floating lid 20 is floated on the developer in the tank body 1a. The floating lid 20 is for suppressing evaporation and oxidation of the developing solution.

Next, the operation of the above embodiment will be described. The printing plate is carried in from the mounting table 4 into the developing tank 1 in which the developing solution is stored. At this time, the printing plates are immersed in the developing solution in the tank main body 1a by driving the conveying rollers 6, 13 and the like. At this time, the rotating brushes 15a and 15b rotate to rub the surface of the printing plate to accelerate the developing process. The printing plate that has undergone the development processing passes between the pair of squeezing rollers 21 and 21, and is further transported to the washing tank 2 side.

The printing plate from which the developing solution has been squeezed by the squeezing rollers 21 and 21 is washed in the rinsing tank 2, rinsed in the rinsing tank 3, and then discharged to the outside. When the modified printing plate is washed with water, the printing plate is inserted through the bypass insertion port 24 and passed through the washing tank 2 and the rinse treatment tank 3. When the printing plate passes between the squeezing rollers 21 and 21, the developing solution adhering to the surface of the printing plate is squeezed out by the pressure contact force of the squeezing rollers 21 and 21. The squeezed contaminated developer drops downward, but since the overflow groove 23 is provided adjacent to the squeezing rollers 21 and 21, the contaminated developer is completely contained in the tank main body 1a. Before being diffused in, it is discharged relatively quickly to the overflow groove 23 side. As a result, the developer in the tank main body 1a is less likely to be contaminated and the deterioration of the processing liquid is suppressed.

On the other hand, when circulating the developing solution, the circulation pump 12 is driven. As a result, the developer in the tank body 1a is sucked out from the discharge pipe 16 and returned to the tank body 1a again from the spray pipe 11 and the spray 27. Further, at the time of replenishment of the developing solution, the replenishing pump 36 is driven, and new developing solution is supplied from the replenishing solution tank 26 into the tank main body 1a through the replenishing pipe 25. At this time, the circulation pump 12 is also driven and the developer is vigorously ejected from the spray 27 adjacent to the replenishment pipe 25, so that the developer supplied from the replenishment pipe 25 is efficiently stirred. On the other hand, the excess developer in the tank body 1a is discharged to the overflow groove 23 side. As a result, the amount of the developer in the tank body 1a is kept constant.

[Other Embodiments] The present invention can be similarly implemented by the embodiment of FIG. 2 instead of the embodiment of FIG. In the automatic developing device of FIG. 2, a replenishing pipe 125 is arranged near the brush roller 15a instead of the replenishing pipe 25 of FIG. Further, instead of the overflow groove 23 of FIG. 1, an overflow groove 123 is provided between the guide roller 19 and the diaphragm roller 21.

In this case, since the overflow groove 123 is arranged at a position almost corresponding to the position where the contaminated developing solution from the squeezing roller 21 falls, the effect of discharging the developing solution from the squeezing roller 21 is obtained. Is high. The overflow groove does not have to be provided in the entire region of the squeezing roller 21 in the longitudinal direction, and may be provided partially.

[0021]

[Effect of the device]

 In the photosensitive material processing apparatus according to the present invention, since the processing liquid overflow portion is provided adjacent to the squeezing roller pair, the highly contaminated processing liquid removed from the photosensitive material on the squeezing roller pair is easily discharged. The deterioration of the processing liquid in the processing liquid tank can be suppressed.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of an automatic developing device as an embodiment of the present invention.

FIG. 2 is a view corresponding to FIG. 1 of another embodiment.

[Explanation of symbols]

 1 Development Tank 1a Tank Main Body 13 Conveying Roller 21 Squeezing Roller 23,123 Overflow Groove

Claims (1)

[Scope of utility model registration request] 1. A processing liquid tank in which a processing liquid is stored, a conveying means for passing a photosensitive material into the processing liquid, and a contact portion thereof is located above a processing liquid surface in the processing liquid tank. A pair of squeezing rollers configured to discharge the photosensitive material from the processing liquid tank while squeezing the processing liquid on the photosensitive material, and a processing liquid overflow portion provided adjacent to the squeezing roller pair, And a photosensitive material processing apparatus.