JPS628149A - Processing device for photosensitive material - Google Patents

Abstract

PURPOSE:To obtain an optimum squeezing effect with a good tight contact characteristic and to minimize the carry over of a processing liquid by using mirror-faced rollers to form squeeze rollers provided to a processing section for a photosensitive material thereby providing prescribed hardness to the rollers with the simple constitution and setting the roller surfaces to the specular surfaces having accuracy. CONSTITUTION:Bearings 16, 17 of the squeeze roller 15 positioned in the upper part are pressed downward in the upper part thereof by ends 22a, 23a of nip springs 22, 23. The springs 22, 23 are supported by lock pins 24, 25 and the energizing force for downward pressing is exerted to the ends of the spring 22, 23 by positioning pins 26, 27. The lower squeeze roller 15 is rotated as a driving shaft 29 rotates. The squeeze rollers 15 are so constituted that the upper roller is rotated cooperatively by the rotation of the lower roller. The rollers 15 are constituted of the specular-faced rollers. Each of the specular-faced rollers is formed by polishing the inside peripheral surface of a metallic pipe, subjecting the polished inside surface to chrome plating to form a mold having the specular surface, pouring rubber stock of fluid type into such mold and curing the rubber.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a photosensitive material processing apparatus that includes a squeeze roller in a processing section for processing a photosensitive material.

(Background of the Invention) For example, there is an apparatus for processing lithographic printing plates or photographic films known as photosensitive materials, which process the photosensitive materials as they are conveyed through a processing section.

Incidentally, a squeeze roller is disposed on the conveyance path of this processing section, and the squeeze roller squeezes the photosensitive material being conveyed, thereby reducing as much as possible the removal of the processing liquid.

(Problem to be solved by the invention) A rubber roller is used for this squeeze roller, and this rubber roller wraps a rubber sheet around a roller core by a so-called lamination method, and after vulcanization, the surface is polished by mechanical means. It is formed as follows.

In other words, if the squeeze roller surface is matte and rough, the liquid removal effect of the squeeze roller will be halved, so the roughness of the roller surface should be minimized and the roller should have a predetermined hardness to obtain the optimum squeezing effect. There is a need. However, when a rubber roller is formed using the TA layer method, the roughness of the roller surface is made finer because it is polished by mechanical means.
To improve accuracy, the hardness of the rubber roller must be relatively high. However, if the hardness of the rubber roller is too high,
The squeeze effect was reduced, and in order to mechanically polish to the desired hardness, it was necessary to polish slowly and slowly, which increased processing time and increased costs, and was not suitable for mass production. .

This invention was made against the background of the above circumstances, and has a simple structure that improves the surface accuracy of the squeeze roller, and makes it possible to select the hardness appropriately, thereby making it possible to reliably drain liquid. The purpose is to provide a photosensitive material processing apparatus.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a photosensitive material processing apparatus in which a photosensitive material is processed while being conveyed through a processing section, and is equipped with a squeeze roller that squeezes a processing solution. In this invention, the squeeze roller is formed of a mirror-finished roller.

(Function) In this invention, the squeeze roller provided in the photosensitive material processing section is formed of a mirror roller, and the photosensitive material is squeezed by this squeeze roller. The squeeze roller has a simple structure, has a predetermined hardness, and is set to a mirror surface with roller surface precision, so the roller surface has good adhesion and an optimal squeeze effect is achieved, minimizing the removal of processing liquid. can be suppressed to

(Example) Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

First, FIGS. 1 and 2 show the application of the present invention to a photosensitive material processing apparatus for lithographic printing plates. FIG. 1 is a schematic sectional view of the photosensitive material processing apparatus, and FIG. 2 is an enlarged perspective view of the main parts. It is.

In the figure, reference numeral 1 denotes a photosensitive material processing apparatus, and this photosensitive material processing apparatus 1 is equipped with a development processing section 2, a water washing processing section 3, and a wash gum or rinsing processing section 4. The lithographic printing plate, which is the photosensitive material 5, is placed in these processing sections 2, 3.4.
A conveyance path 8 composed of a conveyance roller 6 and a guide roller 7
are sequentially conveyed, and a processing liquid is sprayed through the shower nozzles 9, 10.11 of the respective processing sections 2, 3.4 for development processing.

A brush processing section 12 is arranged after the development processing section 2, and the photosensitive material 5 is transferred to a brush guide 13 and a brush roller 14.
When the photosensitive material 5 is conveyed between the photosensitive material 5 and the photosensitive material 5, the photosensitive layer in the non-image area on the photosensitive material 5 is brushed and removed by a brush roller 14.

Squeeze rollers 15 are arranged downstream of the brush processing section 12, as well as after the water washing section 3 and the wash gum or rinse processing section 4.

As shown in FIG. 2, both ends of each squeeze roller 15 are rotatably supported by bearings 16 and 17. This squeeze roller 15 has its bearings 16 and 17.
The bearing member 2 fixed to the inside of the processing tank side plate 18.19
0.21, the two squeeze rollers 15 are pivotally supported so that the roller portions 15a of the two squeeze rollers 15a contact each other and rotate in conjunction with each other.

The upper part of the bearing 16.17 of the squeeze roller 15 located above is connected to the ends 22a, 23a of the nip spring 22.23.
It is being pushed down towards the bottom. This nip spring 22
．． 23 is supported by fixed pins 24.degree. 25, and one positioning pin 26.27 applies downward urging force to the end of the nip spring 22.23. Thereby, the rollers tSa of the squeeze rollers 15 are pressed against each other with a predetermined pressure, and a good squeezing effect is obtained.

A worm wheel 28 is provided at one end of the squeeze roller 15 located below, and the worm wheel 28
meshes with a worm gear 30 provided on the drive shaft 29.

The rotation of this drive shaft 29 causes the lower squeeze roller 1 to
5 rotates, and the rotation of this squeeze roller 15 causes the upper squeeze roller 15 to rotate in conjunction.

The squeeze roller 15 is composed of a mirror roller. Mirror rollers are made by polishing the inner surface of a metal pipe and applying chrome plating to create a mirror surface, then injecting a fluid type rubber material into a mold and allowing it to harden. Moreover, other than metal pipes can also be formed by injecting into resin pipes for casting.

This mirror roller has a mirror surface, so the roller surface has good adhesion and there is no leakage of processing liquid.Also, the photosensitive material 5 and other objects to be conveyed pass between the mirror rollers. Because of its good adhesion to the surface, it has a great effect on squeezing out liquid that adheres to the surface of non-conveyed objects.Furthermore,
Because it is molded by casting, the rubber hardness is, for example, 20 to 25.
The squeeze effect can be further increased.

Therefore, for example, in the case of a photosensitive material 5 with a thickness of 0, 15 to 0, 3 mm, the amount of liquid taken out after development processing is 8.
It can be suppressed to less than mi/m''.

Furthermore, with regard to workability, mass production can be achieved simply by forming a cast mold, which has the effect of reducing costs.

FIG. 3 is a sectional view showing another embodiment to which the present invention is applied.

In the figure, reference numeral 41 denotes a photosensitive material processing device for developing a photographic film, which is a photosensitive material 42;' On one side of this photosensitive material processing device 41, there is an insertion table 43 for inserting the photosensitive material 42;
A photosensitive material receiver 44 is provided on the other side. Inside, a developing processing section 45, a fixing processing section 46, a washing processing section 47, and a drying section 48 are arranged from the insertion table 43 side to the photosensitive material receiver 44.

The photosensitive material 42 is inserted from the insertion table 43, and the photosensitive material 42 is inserted into the development processing section 4.
5. The photosensitive material passes through a conveying path 50 formed by conveying rollers 49 disposed in the fixing processing section 46, the washing processing section 47, and the drying section 48, is processed therebetween, and is taken out to the photosensitive material receiver 44. A squeeze roller 51 formed of a mirror roller is disposed downstream of the washing section 47 and is designed to sufficiently remove water before supplying it to the drying section 48 .

In the above embodiment, the squeeze rollers 15, 51 made of mirror-finished rollers are provided in a lower pair, but the upper squeeze rollers 15, 51 are made of mirror-finished rollers, and the lower squeeze rollers 15, 51 are formed by mechanical polishing. You can also combine things.

(Effects of the Invention) As described above, in this invention, the squeeze roller provided in the photosensitive material processing section is formed of a mirror roller. Therefore, the squeeze roller has a simple structure and a predetermined hardness, and the roller surface has high precision. The mirror surface has good adhesion, provides an optimal squeezing effect, and minimizes removal of processing liquid.

[Brief explanation of the drawing]

1 and 2 show the present invention applied to a photosensitive material processing apparatus for lithographic printing plates. FIG. 1 is a schematic sectional view of the photosensitive material processing apparatus, FIG. FIG. 3 is a sectional view showing another embodiment to which the present invention is applied. 2.45... Development processing section 3.47... Washing processing section 4... Wash gum or rinsing processing section 5.42...
・Photosensitive material 6.49...Conveyance roller 8.50...Conveyance path

Claims (1)

[Claims] 1. A photosensitive material processing apparatus in which a photosensitive material is processed while being conveyed through a processing section and is equipped with a squeeze roller for squeezing a processing liquid, characterized in that the squeeze roller is formed of a mirror-finished roller.