JPH0210521Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an automatic developing machine for film and photographic paper, and particularly to a small automatic developing machine. More specifically, the present invention relates to cleaning of the processing roller of the developing machine.

(Prior art) When currently used X-ray films, printing films, and photographic paper are developed using automatic processors, when developing with a new solution, substances eluted from the photosensitive material agglomerate in the developing solution. things and trash,
There is no dust or the like, and the foreign matter will not adhere to the photosensitive surface and backside support surface of the photosensitive material and cause stains.

However, the developers and fixers currently in use have been improved to prevent oxidation fatigue, and developer replenishment systems have been developed and maintained to prevent processing fatigue. When replaced with liquid, 1
Without replacing the mother liquor for 1 to 3 months, a considerable number of photosensitive materials must be processed every day. At this time, in film, especially photographic printing paper, the gelatin in the photosensitive emulsion melts and aggregates, producing so-called scum.
In addition, sludge is generated due to elution from the emulsion and oxidation or deterioration of the processing agent composition, and floats in the developer and fixer. When the rack for transporting the photosensitive material is driven in this state, the floating gelatin scum or sludge is attracted to the roller located on the liquid surface and adheres to the surface of the roller.

If a photosensitive material is processed with gelatin scum etc. attached to the surface of the roller in this way, this gelatin scum etc. will be transferred to the photosensitive surface, and gelatin scum etc. will remain attached to the photosensitive film even after the fixing and water washing processes. is not removed and is dried as is, becoming a fixed foreign substance. These stains are especially noticeable on photographic paper, and there was a practical problem in that if there were foreign substances (stains) stuck inside the screen, especially if the stains were superimposed on the letters or images, the manuscript could no longer be used. .

To deal with these problems, automatic processors that process photosensitive materials that are prone to stains such as sludge and gelatin scum are equipped with liquid level rollers for the developing, fixing, and washing processing racks that are submerged in the processing solution. There is a machine that has a structure in which dirt such as sludge and gelatin scum is floated on the liquid surface to prevent it from adhering to the rollers and to make it easier to wash away with water.

However, this structure makes it difficult to develop, fix and fix.
The transport distance outside the solution of each crossing rack from the fixing rack to the washing rack is long, and the ratio of crossing distance to the processing liquid immersion distance is large. For this reason, although it is permissible for large, high-capacity aircraft, it cannot be mechanically adapted to small aircraft.

Also, if the conveyor roller is protruding from the liquid surface, improve the liquid surface agitation to prevent sludge or gelatin scum from floating on the liquid surface, or overflow the upper layer of the liquid and filter this liquid with a filter. Although this method is effective when the liquid is being circulated, it is necessary to turn on the power switch and turn on the circulation and drive switches after the automatic processor has stopped, especially after it has been stopped overnight. When I put it in,
When the roller rotates, sludge, gelatin scum, etc. floating on the liquid surface are lifted onto the roller surface and adhered to the roller surface while the liquid is stopped. Adhering sludge and gelatin scum are adhesive soft scum and are difficult to wash away in a water washing process. Therefore, failure due to foreign matter sticking to some sheets due to sludge or gelatin scum during startup is unavoidable.

(Purpose of the invention) The purpose of the invention is to provide a small-sized automatic developing machine that does not cause malfunction due to foreign matter sticking to processed photosensitive materials even when the mother liquor is not replaced for a long period of time. That's true.

A second object is to provide a developing machine processing rack having cleaning means suitable for the above-mentioned purpose.

(Structure of the invention) The object of the invention described above is to provide an automatic developing machine in which the transfer roller of the processing rack is exposed from the surface of the processing liquid, by means of a processing rack of the developing machine having a means for cleaning the surface of the transfer roller. achieved.

Next, the present invention will be specifically explained using the drawings.

FIG. 1 is a diagram showing the main points of the processing rack structure of a conventional small-sized automatic processor according to the present invention.

This figure shows an example of an automatic developing machine for small-sized computer typesetting paper and manual typesetting paper. In the figure, 9 is a developing rack, 1 is a fixing rack, and 10 is a washing rack (hereinafter abbreviated as rack). The photosensitive material 6 coming out of the squeeze roller of the developing rack 9 is guided to the fixer tank 2 by the guide 5 and the inlet roller 3 of the fixing rack 1, passes through the U-turn guide 7, is guided by the outlet liquid level roller 8, and is guided by the squeeze roller. It is sent to the washing rack 10. The fixing liquid level 4 is applied to the entrance roller 3 and the exit liquid level roller 8.

If such a conventional rack is used for a long period of time without replacing the mother liquor, gelatin scum 11 will float on the fixer solution surface 4 as shown in FIG. Transferred to 6.

FIG. 3 shows an example in which the gelatin scum 12 is transferred to the photosensitive material 6, causing foreign matter to stick.

Next, the transfer roller (for example, the inlet roller 3, etc.) exposed to the surface of the processing liquid such as the gelatin scum described above.
A cleaning means for eliminating adhesion to the surface will be explained.

In FIG. 4, a blade 13 is attached to the side of the inlet roller 3.
An embodiment has been shown in which the rollers are in contact with each other or at least provided close enough that scum etc. do not wrap around between the roller and the blade. A structure is shown in which gelatin scum 11 floating on the fixer liquid surface 4 is blocked from the roller surface.

FIG. 5 also shows that scum and the like are prevented from floating on the side surface of the outer roller facing the inner inlet roller 3.
It also shows a structure in which a blade is provided close to the roller to scrape off scum and the like attached to the roller in the liquid.

The above-mentioned blade may have a form in which a resin blade 17 is supported by a support 16 and a fixing fitting 15 is attached as shown in FIG.
It may be composed of a single plate.

By configuring the cleaning means as in the above embodiment, gelatin scum 1 floats on the liquid surface as shown in FIG.
1, although the inlet roller 3 rotates in the direction of scooping up scum, the blade 13
By making the tip of the blade 13 contact the side surface of the inlet roller 3 and entering below the liquid level, the gap between the gelatin scum 11 floating on the liquid surface and the inlet roller 3 is cut off, and the inlet roller 3 Prevent gelatin scum 11 from adhering to the surface. Also, since the tip of the blade 13 is in contact with the surface of the inlet roller 3,
It is possible to scrape off fatigue liquid on the roller surface and constantly supply fresh processing liquid to the roller, thereby preventing uneven processing and staining of the photosensitive surface of the photosensitive material 6. Furthermore, even greater effects can be expected by combining this blade with a mechanism that combines liquid level circulation and a filter.

This blade can be made of resin film, rubber, metal plate, or the like. By screwing this onto the frame, it becomes a mechanism that can be easily removed, making it easier to clean the rack. Further, this blade does not need to be pressed against the roller surface using a spring or the like, and the purpose is sufficiently achieved by lightly contacting the roller surface with the appropriate weight of the blade.

Still another embodiment is shown in FIG. This is a method in which a wide nozzle 18 having a large number of pores or slots is applied to the roller surface parallel to the cylindrical axis of the inlet roller 3.

The wide nozzle 18 branches a part of the liquid flow from the circulation pump of the processing liquid and introduces it into the nozzle from an inlet pipe 181, and causes a liquid film 183 to fall on the surface of the roller 3 from a spout 182 and adhere to the surface. The scum 11 is removed from the roller surface by washing off the scum and creating a liquid reservoir 19 with a high liquid level on the tangent between the roller and the processing liquid to create a liquid flow that moves away from the roller.

Further, the front width nozzle 18 can also be used as an air doctor by introducing a gas such as air from a conduit 181 using a blower and ejecting a gas film flow 183 from an ejection port 182. In this case, if the gas film flow is too strong, the liquid reservoir 19 will conversely dent and the scum 11 will be attracted to the roller surface, so it is necessary to adjust the flow to such an extent that this inconvenience does not occur.

Still another embodiment is shown in FIG. A flow guide plate 20 having a streamlined surface 201 is provided so that the streamlined surface 201 faces the surface of the roller 3, and a liquid reservoir 19 is provided to the processing liquid flowing into the facing gap along with the surface of the roller 3.
At the same time, a liquid flow is created along the streamline surface 201 and away from the roller surface to separate the scum 11 from the roller surface.

This method exhibits the same effect as the first embodiment described above when the liquid level decreases.

[Brief explanation of the drawing]

Figure 1 shows an example of the processing ease of a small automatic processor, Figure 2
The figure is an explanatory diagram of adhesion of sludge to a roller, and FIG. 3 is an example of gelatin scum transferred to a photosensitive material. Fourth
The figure shows Embodiment 1 of the present invention, and FIG. 5 shows Embodiment 2.
FIG. FIG. 6 is a perspective view of blade type example 1, and FIG. 7 is a perspective view of blade type example 2. FIG. 8 is an explanatory view a and a perspective view b of a nozzle type cleaning means. FIG. 9 is an explanatory diagram of a cleaning means using a flow guide plate. 1...Fixing rack, 2...Fixing treatment tank, 3...
Liquid level entrance roller, 4... Fixer liquid level, 5... Entrance guide, 6... Photosensitive material, 7... U-turn guide,
8...Liquid level outlet roller, 9...Developing rack, 10
...Water rack, 11... Sludge or gelatin scum, 12... Gelatin scum, 13... Blade device, 14... Rear blade device, 15...
Fixing metal fittings, 16...Blade support, 17...Blade, 18...Wide nozzle, 20...Driving plate.

Claims (1)

[Scope of utility model registration request] In an automatic developing device having a plurality of processing tanks for developing photosensitive materials and a transport roller for transporting the photosensitive material within each processing tank, the transport roller guides the photosensitive material into the processing tank. Floating matter on the surface of the processing liquid comes into contact with the entrance-side transport roller, which is provided so that a portion of the roller is exposed from the surface of the processing liquid, and as the roller rotates, it rides on the circumferential surface of the roller and is exposed to light. An automatic developing machine that is equipped with a blade that prevents adhesion to materials.