JP2556779Y2 - Filter abnormality detection device of automatic developing machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a means for detecting an abnormality such as clogging of a filter device provided in an automatic developing machine for photosensitive material.

[0002]

2. Description of the Related Art A developing machine for a photosensitive material using a silver salt is used for developing,
The transfer processing is carried out while immersing in the processing tanks containing the processing liquids for fixing, stabilization, etc., but the processing liquids are taken out to the next tank by the photosensitive material passing through the processing tanks, mixed and mixed. As the processing performance deteriorates, extraordinary substances are generated, and fine powdery debris is also generated by the photosensitive material. Performance will not be obtained.

In order to avoid such a situation, a replenisher is supplied in accordance with the processing amount of the light-sensitive material, and a corresponding measure is taken to discard the old reduced pressure solution little by little. A filter device is provided in each processing tank in order to cut off abnormal substances such as effluents to purify the processing liquid.

[0004]

However, the filter of the filter device may be clogged in a relatively short time, and it is very difficult to find it. If the detection is properly performed, the filter regeneration operation can be effectively performed.However, until now, it was not easy to do so. Came.

[0005] In such a case, a filter which can still sufficiently perform its function is discarded, or a filter which is still considered to be okay is in a state where it does not work at all, thereby deteriorating the finished quality of development, Or wasted consumption of expensive materials.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a filter abnormality detecting device for an automatic developing machine which solves such problems.

[0007]

This object is achieved by the following technical means.

[0008] The circulating pipe through a pump between the outlet and the treatment tank inlet of the automatic developing machine processing filter device provided in the tank is provided, it said in a motor driving circuit for driving the pump An ammeter that can detect the value of the current flowing through the motor
A filter abnormality detection device for an automatic developing machine, wherein the device is provided as a sensor, and the abnormality of the filter device can be determined based on the current value .

[0009]

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. A processing tank 1 containing processing liquids 2 for developing, fixing, and stabilizing is provided, and a plug part of a cartridge filter 13 is inserted into a filter set fitting opening 15 at the bottom of the processing tank 1.
14 is fitted in a fitted state and kept in a watertight state. The cartridge filter 13 is a cylindrical filter made of a heat-bonded or sintered alloy of a porous polypropylene fiber, absorbs the processing liquid from the outer peripheral part through the porous part, flows out to the inner cylindrical part, and further flows into the inner cylindrical part. The cylindrical portion is opened at a lower portion, and the outlet 3 and the inlet 4 to the processing tank 1 again are connected by a circulation pipe 5, and a pump 6 is connected to the middle of the circulation pipe 5. The ammeter 7 is connected as a sensor so that the value of the current flowing through the motor 6A driving the pump 5 can be measured and detected.

A knob 16 is provided above the cartridge filter 13 so that the cartridge filter 13 can be easily fitted and set in the processing tank 1.

When the filter 13 is clogged and the processing liquid is difficult to pass, the load of the pump 6 increases, the current load of the motor 6A directly connected to the pump 6 increases, and the current value of the ammeter 7 connected to the motor drive circuit becomes abnormal. Become higher. By detecting this value with a sensor, the condition of clogging of the filter is caught, and based on this, the flow direction of the processing liquid refluxing the filter is reversed, and the clogged residue and debris are discharged to remove the filter 13. Can be reproduced.

[0013] However, the state must eventually to the exchange came to play inability to state in one go also repeatedly re-live many times. That is, in this case, the processing liquid flows forward,
Even if the backflow is repeated, the clogged state cannot be eliminated, the current value does not decrease, and the sensor keeps detecting the abnormal value, so that the replacement can be accurately determined.

[0014]

[0015]

[0016]

[0017]

[0018]

According to the present invention, the abnormality of the filter function of the processing tank of the automatic developing machine can be accurately determined by simple means, whereby the regeneration or replacement of the filter can be performed accurately.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Processing tank 2 Processing liquid 3 Outlet 4 Inlet 5 Circulation pipe 6 Pump 6A Drive motor 7 Ammeter sensor 13 Cartridge filter 14 Plug part 15 Filter fitting port 16 Pick

Claims (1)

(57) [Scope of request for utility model registration] A circulation pipe is provided between an outlet of a filter device provided in a processing tank of an automatic developing machine and an inlet of the processing tank via a pump, and a driving circuit of a motor for driving the pump is provided. A device for detecting an electric current flowing through the motor as a sensor , wherein an abnormality of the filter device can be determined based on the electric current value .