JPH0532847Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an improvement for removing dirt from the contact area of a silver salt photosensitive material (hereinafter simply referred to as photosensitive material) of a transfer unit between tanks of a developing device. .

[Conventional technology]

The photosensitive material sent to the developing device is sequentially conveyed through processing solutions such as a developing tank, a bleach-fixing tank, and a stabilizing tank, where it is finished. In order to prevent the liquid from mixing with the next processing liquid, the passage of the photosensitive material sandwiched between the transport rollers in the transfer section between tanks is made to pass above the liquid level so that as much processing liquid as possible can reach the next tank. For this reason, the tanks are clearly separated to prevent processing liquids from flowing into each other.

[Problem that the invention attempts to solve]

As mentioned above, conventionally, the processing liquid that has adhered to the photosensitive material and is transported to the tank-to-tank transfer section above the liquid level of the processing liquid tank is deposited and then dries, gradually accumulating dirt, resulting in a poor feeling when passing through the processing liquid tank. The problem of dirt adhering to the material also occurred, and in order to avoid this problem, it was necessary to occasionally clean the crossing conveyance section above the liquid level, which was troublesome.

Furthermore, if the liquid transfer mechanism uses a pair of rollers, the surface area of the rollers will expand the liquid surface area of the processing tank, increasing the amount of evaporation of the processing liquid and changing the liquid concentration. It had some drawbacks.

An object of the present invention is to provide a developing device that eliminates such drawbacks.

[Means for solving problems]

The purpose of this is to develop the silver salt photosensitive material between adjacent processing tanks and between the final processing tank and the drying section in a developing device that develops the silver salt photosensitive material while sequentially conveying it through each processing solution in a plurality of processing tanks. the crossing conveyance unit is separated from the submerged conveyance unit, and
This is achieved by a silver salt photosensitive material conveying device of a developing device, which is characterized by having an elevating device that can be immersed in the liquid.

〔Example〕

The present invention will be explained using a developing device shown in FIG. 1 incorporating one embodiment of the present invention. However, the present invention is not limited to this.

The developing device 1 includes a developing tank 42, a bleach-fixing tank 61,
First stabilization tank 62, second stabilization tank 72, drying section 9
5. A recovery section 96 is provided.

and a bleach-fix tank 61, first and second stabilization tanks 6
2 and 72 have the same dimensions, the structure will be explained only for the bleach-fixing tank 61, and the explanation for the first and second stabilizing tanks will be omitted.

The photosensitive material is fed into the developer tank 42 through the passage 3. Secondary side plates 2 are provided symmetrically on the front side and the back side of the developing tank 42, and the nipping conveyance rollers 4,
5, 6, 7, 8, 9, 10, 11, 12, 13,
14, 15, 16, 17, 18, 19 are rotatably fixed to the both side plates 2, and guide plates 24, 25, 2 are provided on the both side plates 2 to form a conveying path for the photosensitive material.
6, 27, 28, 29, 30, 31, 32, 3
3, 34, 35, 36, 37, 38, 39 are 2
The sheets are arranged almost symmetrically one by one to form a submerged conveyance unit, and drive is transmitted to each of the nipping and conveying rollers so that the photosensitive material is conveyed through the developing tank 42 at a constant speed.

Then, the transport roller 20, which is partially out of the liquid, and the roller 21, which is pressed against it and is completely out of the liquid, are attached to both side plates 41 that move up and down in the liquid tank, and are placed in the position shown in FIG. They are arranged to form a crossing conveyance unit. When in this position, the driving force is transmitted so that the photosensitive material is synchronously conveyed at the same speed in the same way as with each of the nipping and conveying rollers.

As described above, the photosensitive material is developed while being conveyed at a constant speed within the developing tank, and then enters the conveying rollers 44 and 45 at the entrance of the bleach-fixing tank 61 via the rollers 20 and 21. This conveyance roller is movable up and down like the rollers 20 and 21, and constitutes a crossing conveyance unit.

Two side plates 43 are provided almost symmetrically on the front side and the back side inside the bleach-fix tank 61, and the holding rollers 4
6, 47, 48, 49, 50, 51 are rotatably fixed to the both side plates 43, and guide plates 54, 55,
56, 57, 58, 59, 60, 55 are provided almost symmetrically in two each to constitute a submerged conveyance unit,
Drive is transmitted to each of the nipping and conveying rollers so that the photosensitive material is conveyed through the solution in the bleach-fixing tank 61 at a constant speed.

The transport rollers 44, 52 are partially out of the liquid, and the rollers 45, 53 are in contact with them and are completely out of the liquid.
and are attached to both side plates 82 that move up and down within the liquid tank, and are arranged at the positions shown in FIG. 1 to constitute a crossing conveyance unit.

When in this position, the driving force is transmitted so that the photosensitive material is synchronously conveyed at the same speed in the same way as with each of the nipping and conveying rollers.

As described above, the photosensitive material is bleach-fixed while being conveyed at a constant speed in the bleach-fixing tank, and the rollers 52, 53
to the conveyance roller 44 at the entrance of the first stabilization tank 62,
Enter 45. The conveyance roller is movable up and down.

The photosensitive material that has entered the first stabilization tank 62 in this way completes the first stabilization process through the same process as the conveyance in the bleach-fix tank 61, and is then transferred to the next second stabilization tank 72. Further, after passing through the same process as the conveyance in the bleach-fixing tank 61, the second stabilization treatment is completed, and the sheet is sent to the drying device 95, where it is dried and finished, and collected into the collection table 96.

Here, each of the submerged conveyance units and crossing conveyance units in the bleach-fix tank 61, the first stabilization tank 62, and the second stabilization tank 72 have the same structure.

The above-mentioned three-tank crossing conveyance unit has both side plates 41 provided on the front side and the back side and three sets of side plates 8.
2 are fastened and fixed to bridge plates 86 on both sides provided on the front side and the back side, respectively.

A screw shaft 9 is attached to a frame 81 provided on the front side and back side of the upper part of the main body of the developing device 1.
1 is bearings 87 and 8 provided on the frame 81.
8 and is rotatably fixed to the shaft and thrust fixed in the axial direction. There are four locations where they are installed, including two locations shown on the back side of Figure 1 and two locations on the near side.

A worm wheel 89 is fixed concentrically to the screw shaft, and drive is transmitted by a worm (not shown).

A drive transmission frame 85 is fixed to the bridge plate 86, and a female threaded block 93 that is screwed into the screw portion 91A of the screw shaft 91 is fixed to the frame 85.

In this way, the side plates 82 and 41 connected to the bridge plate 86, to which the rotational drive is transmitted by the worm, can be moved up and down in each processing tank together.

When conveying the photosensitive material, the crossing conveyance unit equipped with such a lifting and lowering function assumes the roller position shown in Figure 1, and when the photosensitive material is not being conveyed, the conveyance rollers of the unit are submerged below the liquid surface. In other words, by lowering the lifting amount of the roller that is out of the liquid by S ₁ from the liquid level l shown in Figure 1 by the height of S ₂ where S ₁ < S ₂ , the entire roller surface is submerged in the liquid. As a result, the precipitates of the processing agent deposited on the roller surface can be eluted into the liquid again, making it possible to restore the roller surface to cleanliness.

At this time, if a drop lid 98 is provided in each tank near the top of the submerged roller of the crossing conveyance unit, the drop lid will come into contact with the liquid surface when the unit descends, which will help prevent liquid surface oxidation due to air and liquid evaporation. becomes possible.

By controlling the vertical movement of the cross-conveyance unit in this manner, it is possible to keep the surface of the conveyance roller of the unit clean.

In addition, the water level due to partial submergence of the crossing conveyance unit
In order to prevent liquid from mixing between tanks due to an increase in water, it is necessary to temporarily return the volume of processing liquid equivalent to the submerged tank to another tank in advance. However, a detailed explanation of this will be omitted.

[Effect of idea]

With this invention, contamination caused by precipitated processing liquid that adheres to the rollers of the cross-conveying section is removed, clean handling of the sensitive material is achieved, wasteful evaporation of processing liquid is avoided to some extent, and proper processing is achieved. Development processing can now be performed stably. This has made it possible to contribute to the stable improvement of the quality of image finishing on photosensitive materials.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a developing device incorporating the silver salt photosensitive material conveying device of the present invention. 20, 44, 52... Partially liquid-external conveyance roller, 2
1, 45, 53... Liquid transport roller, 41, 82
...Both sides plates (for lifting), 2, 43...Both sides plates (for fixing in liquid), 42...Developer tank, 61...Bleach-fix tank, 62...First stabilization tank, 72...Second Stabilization tank, 81... Frame, 85... Drive transmission frame, 86... Bridge plate, 87, 88...
Bearing, 89... Worm wheel, 91... Screw shaft, 91A... Screw part, 93
...Female screw block.

Claims (1)

[Scope of utility model registration request] In a developing device that develops a silver salt photosensitive material while sequentially conveying it through each processing solution in a plurality of processing tanks, a cross-transport unit for the photosensitive material is provided between adjacent processing tanks and between a final processing tank and a drying section. 1. A silver salt photosensitive material transporting device for a developing device, characterized in that the silver salt photosensitive material transporting device is separated from a transporting unit submerged in a liquid and has an elevating device that can be immersed in the liquid.