JPH0241632Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a photosensitive material processing device for printing plate making, and more specifically, a photosensitive material processing device for printing plate making that prevents contamination of processing liquid for processing photosensitive material for printing plate making. It is related to.

[Prior Art] Conventionally, as a photosensitive material processing apparatus for printing plate making that develops an offset plate (PS plate) known as a photosensitive material for printing plate making that has been exposed to light, there is one that performs a washing process with running water after the development process. It is difficult to secure designated water distribution locations, the amount of water used is large, and running costs are high.

Therefore, there are products that are processed directly with a wash gum solution or a rinsing solution without washing with water after the development process, but since there is no washing step, the lifespan of these solutions is short, and if the solution gets dirty, it is easy to stain the plate. Become. In addition, there is a method in which the developing process is carried out in two processing solution tanks, and in the subsequent process, the processing is performed directly with a wash gum solution or a rinsing solution without washing with water. becomes fatigued and has a short lifespan.

For this reason, after the development process, there are some that carry out circulating washing with stored water, and then process with a wash gum solution or a rinsing liquid.

An example of this is described in the photosensitive material processing apparatus for printing plate making shown in FIG. 2. A processing liquid tank 1, a circulating water washing liquid tank 2, a washing gum solution or a rinsing liquid tank 3 are provided, and the photosensitive material 4 for printing plate making is It is transported by a pair of transport rollers 5 arranged above the processing liquid tank 1 . When the photosensitive material 4 for printing plate making is conveyed over the processing liquid tank 1, the developer in the processing liquid tank 1 is supplied to the photosensitive material 4 for printing plate making from the supply means 6 by the circulation pump. Furthermore, the diazo compound sent to the brush roller 7 and developed and dissolved is removed by the brush roller 7, and a developer is supplied by supply means 8 disposed on both sides of the brush roller 7 to accelerate the development. Next, after squeezing with the squeeze roller 9, the circulating water in the circulating washing liquid tank 2 is supplied to both sides of the printing plate making photosensitive material 4 by the supply means 10 via the circulation pump when passing over the circulating washing liquid tank 2. Spray and pre-wash.

Thereafter, when passing over the wash gum liquid or rinsing liquid tank 3, these cleaning liquids are sprayed from the supply means 11 onto the photosensitive material 4 for printing plate making to clean it. As this cleaning liquid, a wash gum liquid or a rinsing liquid is used depending on the type of photosensitive material 4 for printing plate making.

In this photosensitive material processing apparatus for printing plate making, when the processing liquid becomes exhausted, the development finish of the photosensitive material 4 for printing plate making becomes unstable. For this purpose, as shown in FIG. 3, a processing liquid tank 12 is provided between the processing liquid tank 1 and the circulating water washing liquid tank 2, and the photosensitive material 4 for printing plate making that has been developed in the processing liquid tank 1 is squeezed. Squeeze with roller 9. Then, the supplying means 13 performs development again with a developer similar to a new solution, and the dirty residual liquid that remains on the photosensitive film or the plate surface due to insufficient dissolution on the photosensitive material 4 for printing plate making is developed. Dissolve and wash away. As a result, development is stabilized, and since cleaning is performed in the next circulating washing liquid tank 2, the amount of processing liquid brought into the next washing gum liquid or rinsing liquid tank 3 is reduced, and the washing gum liquid , or the life of a cleaning liquid such as a rinse liquid becomes longer.

However, in this case, since the processing liquid tanks are each independent, the apparatus becomes larger, and the squeeze roller 9 of the processing liquid tank 1 and the conveyance roller 14 of the next processing liquid tank 12 are independent, so There are problems such as an increase in the number of rollers and an increase in cost.

[Problem to be solved by the invention] Therefore, as shown in FIG. It is conceivable to provide a supply means 8 and a supply means 17 on both sides of this roller 16 for development processing.

In this case, the developing tank becomes compact and the number of rollers decreases, and as shown in FIGS. 5 to 7, when the photosensitive material 4 for printing plate making is being developed, When passing over the processing liquid tank 12, the respective developing solutions sprayed from the supply means 8 and 17 swell onto the photosensitive material 4 for printing plate making (FIG. 5).

When the rear end of the photosensitive material 4 for printing plate making leaves the brush roller 7, the photosensitive material 4 for printing plate making
The processing liquid sprayed from the rear end and the supply means 8 travels along the lower roller 16a and falls, and the lower roller 1
It enters the processing liquid tank 12 side through the gap 18 between the lower end of the partition wall 6a and the upper end of the partition wall 15 (FIG. 6). Then, when the photosensitive material 4 for printing plate making passes the roller 16,
The processing liquid injected from the rear end of the photosensitive material 4 for printing plate making and the supply means 17 passes through the gap 18 from the opposite side of the lower roller 16a and enters the processing liquid tank 1 side, and the two may be mixed together. Figure 7).

An example of a device for reducing carryover of processing liquid is disclosed in Japanese Patent Application Laid-open No. 163237/1983. In this device, a perforated molding roller is placed on the partition wall, and the pressure inside the perforated roller is reduced to suck the processing liquid and reduce carryover of the processing liquid. Since the processing liquid is sucked, the apparatus becomes large-sized, and there are problems such as the processing liquid cannot be carried over to the other tank very efficiently, and such means cannot be applied.

Also, as disclosed in Special Bulletin No. 52-96869,
A flexible wiper is installed on the lower roller of the conveyor roller,
Some wipers are brought into pressure contact with the lower roller to prevent the processing liquid from carrying over. This device is equipped with a conveyor roller and a flexible wiper corresponding to each processing tank, making the processing device itself complicated and large, and the flexible wiper is in pressure contact with the lower roller. , the pressure on the lower roller increases,
This causes friction on the roller surface and affects conveyance. In addition, the stiffness of the flexible wiper is important in separating the processing liquid from the roller surface, but if you choose a flexible wiper, the pressure on the roller will increase, making the roller surface more likely to be scratched. However, since the flexible wiper is also under pressure, there is a problem with its durability. Further, when the rollers and flexible wiper are attached and detached for cleaning or the like, it is troublesome to return the flexible wiper to its original shape, and maintenance is troublesome.

This idea was devised in view of these problems, and it is possible to make the processing equipment itself, which has multiple processing liquid tanks, compact, to prevent mixing of both processing liquids with a simple structure, and to be more durable. It is an object of the present invention to provide a photosensitive material processing device for printing plate making that is easy to maintain.

[Means for Solving the Problems] In order to solve the above-mentioned problems, this invention provides a photosensitive material processing apparatus for printing plate making in which a plurality of processing liquid tanks are provided in close proximity to one another, in which one of the plurality of processing liquid tanks is , a pair of conveying rollers for conveying the photosensitive material for printing plate making is disposed at the upper end of a partition wall separating a first processing liquid tank and a second processing liquid tank, and the first Alternatively, a supply means for supplying the treatment liquid to the second treatment liquid tank is provided, and the treatment liquid supplied by the supply means is transferred to the first or second treatment liquid tank.
The present invention is characterized in that guide rollers leading to the processing tank are provided on the first and second processing liquid tank sides, respectively, so as to be in contact with the lower roller of the transport roller.

[Function] In this invention, when the photosensitive material for printing platemaking passes through a pair of upper and lower transport rollers disposed on the upper part of the partition wall that partitions the first processing liquid tank and the second processing liquid tank, the processing liquid flows down from the lower roller, but the processing liquid flowing down from the lower roller is guided by respective guide rollers disposed on the first processing liquid tank side and the second processing liquid tank side, so that the processing liquid flows down from the lower roller. It will not flow into the processing liquid tank and mix into the other processing liquid tank.

[Example] Hereinafter, an example of this invention will be described in detail based on the accompanying drawings.

FIG. 1 is an enlarged sectional view of the main parts of a photosensitive material processing apparatus for printing plate making to which this invention is applied.

The processing liquid tank 1 and the processing liquid tank 12 are separated by a partition wall 15 and are disposed close to each other. Therefore, the width of both is shortened, and the width of the apparatus in the transport direction in which the photosensitive material 4 for printing plate making is transported is correspondingly reduced. is shortened.

A pair of conveyance rollers 16 are arranged above the partition wall 15, and supply means 8 and 17 are arranged on both sides of the conveyance rollers 16. The supply means 8 receives the processing liquid in the processing liquid tank 1 by means of a circulation pump (not shown), while the supply means 17 receives the processing liquid in the processing liquid tank 12 by means of a circulation pump (not shown) through a conveyance path 19. It is designed to be sprayed onto a photosensitive material 4 for printing plate making.

A pair of guide rollers 20a and 20b are arranged so as to be in contact with the lower roller 16a of the conveyance roller 16. The guide rollers 20a and 20b straddle the upper part of the partition wall 15, and their lower ends are located below the upper part of the partition wall 15. The guide roller 20a is provided on the processing liquid tank 1 side, and the guide roller 20b is provided on the processing liquid tank 12 side. and are adapted to rotate in conjunction with the rotation of the lower roller 16a.

Next, the operation of this embodiment will be explained.

The photosensitive material 4 for printing plate making passes through the processing liquid tank 1 and the processing liquid tank 12 while being developed, and when the rear end of the photosensitive material 4 for printing plate making leaves the brush roller 7, the photosensitive material 4 for printing plate making passes through the processing liquid tank 1 and the processing liquid tank 12 while being developed. Rear end and supply means 8
The processing liquid supplied from the lower roller 16a falls, but is regulated by the guide roller 20a located on the processing liquid tank 1 side and returned to the processing liquid tank 1.

Then, the printing plate-making photosensitive material 4 is transferred to the conveying roller 1.
6, the developer jetted from the rear end of the photosensitive material for printing plate making 4 and the supply means 17 travels along the lower roller 16a and falls, but it does not reach the guide roller 20.
b, the liquid is regulated and returned to the processing liquid tank 12.
Therefore, the developer in the processing liquid tank 1 and the processing liquid tank 12
There is no possibility of mixing with the developer inside.

These guide rollers 20a, 20b are the conveyance roller 1
The guide rollers 20a, 20b and the lower roller 16a of the conveyance roller 16 are less likely to be scratched, as they rotate in conjunction with the lower roller 16a of the transport roller 16, and there is no slippage between them during processing. Improves sex.

Furthermore, after removing the conveyance roller 16 or the guide rollers 20a, 20b for cleaning, etc., when reattaching them, the rollers must be assembled together, and all that is required is to bring the conveyance roller 16 into contact with the guide rollers 20a, 20b with a predetermined pressure. It can be easily installed and maintainability is improved.

[Effect of the invention] As described above, this invention transports the photosensitive material for printing plate making to the upper end of the partition wall that separates the first processing liquid tank and the second processing liquid tank among the plurality of processing liquid tanks. A pair of conveyance rollers are disposed to convey the treatment liquid to the first or second treatment liquid tank, and a supply means for supplying the treatment liquid to the first or second treatment liquid tank is disposed near the conveyance roller, and the treatment liquid supplied by the supply means is transferred to the guide roller. Since the liquid is guided to the first or second processing tank, the processing apparatus itself having a plurality of processing liquid tanks can be made compact, and the number of conveyance rollers can be reduced.

Further, a guide roller that guides the processing liquid to the first or second processing tank is connected to a lower roller of a pair of transport rollers arranged at the upper end of the partition wall separating the first processing liquid tank and the second processing liquid tank. Since they are provided on the first and second processing liquid tanks so as to be in contact with each other, the processing liquid can be prevented from entering the other processing tank with a simple structure, and stable processing can be performed.

Further, by providing the guide roller, it is possible to prevent the processing liquid from entering the other processing liquid tank without damaging the guide roller or the lower roller of the pair of transport rollers.

Further, after removing the conveying roller or guide roller for cleaning or the like, when reattaching the roller, the rollers are simply joined together, so positioning is simple and installation is easy.

[Brief explanation of the drawing]

Figure 1 is an enlarged sectional view of the main parts of a photosensitive material processing apparatus for printing plate making to which this invention is applied, Figures 2 and 3.
The figure is a schematic diagram showing a conventional photosensitive material processing apparatus for printing plate making, FIG. FIG. 7 is a diagram showing a state in which the processing liquid flows down in the photosensitive material processing apparatus for printing plate making shown in FIG. 4. In the figure, numerals 1 and 12 are processing liquid tanks, 4 is a photosensitive material for printing plate making, 8 and 17 are supply means, 15 is a partition wall,
16 is a conveyance roller, and 20a, 20b are guide rollers.

Claims (1)

[Scope of utility model registration request] In a photosensitive material processing apparatus for printing plate making, which has a plurality of processing liquid tanks provided in close proximity to each other, an upper end portion of a partition wall that separates a first processing liquid tank and a second processing liquid tank among the plurality of processing liquid tanks. A pair of conveyance rollers for conveying the photosensitive material for printing plate making are disposed on the plate, and
A supply means for supplying a treatment liquid to the first or second treatment liquid tank is disposed near the conveyance roller, and the treatment liquid supplied by the supply means is guided to the first or second treatment liquid tank. the first and second guide rollers so as to be in contact with the lower rollers of the conveyance rollers;
A photosensitive material processing device for printing plate making, characterized in that each device is provided on the processing liquid tank side.