JPS6358348B2 - - Google Patents

Description

[Detailed description of the invention] In an automatic developing machine, when the blackened area of developed photographic paper or film, etc. is accumulated and reaches a certain value, a developer replenisher equivalent to the consumed developer chemicals is added to the developing tank. In the conventional automatic developer activity control device, which electronically manages the developer activity by replenishing the developer and restoring its activity, there is a possibility that power outages or inadvertent occurrences may occur during blackening area integration or replenishment. If you turn off the power, the data such as the blackened area value measured up to that point or the remaining amount of replenisher converted to time will disappear, so the activity of the developer after that will be lower than the standard value. It will come off.

In the case of a power outage, the present invention automatically switches to an emergency power source such as a storage battery, operates the developer activity automatic management device, and saves the above data,
The present invention relates to a method for maintaining the activity of a developing solution at a standard value thereafter, and will be specifically explained below with reference to the accompanying drawings.

Reference numeral 1 denotes a known film blackening rate measuring device installed, for example, between a washing tank and a drying tank of an automatic processor, and its analog output signal is sent to a V/F converter 2 at a frequency corresponding to the blackening rate. The signal is converted into a pulse signal, passed through an AND gate 3, and divided by a frequency division counter 4, and when the blackened area reaches a predetermined value, one pulse is output.

The flip-flop circuit 5 has a frequency division counter 4
A high-level signal is outputted by the output signal of the flip-flop circuit 5 and inputted to the time base oscillator 6, and the time base oscillator 6 oscillates a pulse with a constant period while the output of the flip-flop circuit 5 is at a high level.
The signal is inputted to a preset counter 8 through a gate 7.

Then, in the preset counter 8, the replenishment time is subtracted from the replenishment time set in advance by the replenishment time setting device 9, and the replenishment signal output from the preset counter 8 continues to inject the replenisher until it reaches 0 from the start of the subtraction. Open the constant flow solenoid valve 10 for
A developing tank (not shown) is replenished with replenisher from the replenisher tank 11.

When one replenishment is completed, the electromagnetic valve 10 is closed, the flip-flop circuit 5 is reversed, and the system waits for the next signal from the frequency division counter 4.

Therefore, in the present invention, the high level signal of the separately provided power outage detector 12 is normally input to the AND gates 3 and 7, and the output signal of the previous stage is passed through, and is , an emergency storage battery 14 is installed.

In the above configuration, even if a power outage occurs, the storage battery 14 supplies power, so the data in the frequency division counter 4 and preset counter 8 immediately before the power outage will not be lost, and the output of the power outage detector 12 will not be lost. Since it becomes a low level and closes the AND gate 3, the blackening rate signal from the blackening area measuring device 1 is not input to the frequency dividing counter 4.

Therefore, the frequency division counter 4 and the flip-flop circuit 5 continue the state immediately before the power outage, and furthermore, the AND
Even if the gate 7 is closed and the time base oscillator 6 is oscillating, its pulse will not be input to the preset counter 8, and the preset counter 8 will also maintain the state immediately before the power failure.

Moreover, if a power outage occurs while the replenisher is being refilled, the electromagnetic valve 10 is immediately closed, so that excessive replenishment will not occur.

As soon as the power outage is lifted, each part takes over the state immediately before the power outage and starts operating normally.
The activity of the developer can be maintained at a normal level.

[Brief explanation of the drawing]

FIG. 1 shows an example of a block diagram for carrying out the method of the invention. FIG. 2 also shows the power supply circuit. DESCRIPTION OF SYMBOLS 1... Film blackening rate measuring device, 2... V/F converter, 3... AND gate, 4... Frequency divider, 5... Flip-flop circuit, 6... Time base oscillator, 7...
AND gate, 8...preset counter, 9...
Replenishment time setting device, 10... constant flow solenoid valve, 11... replenisher tank, 12... power failure detector, 13... regular power supply, 14... storage battery.

Claims (1)

[Claims] 1 The signal from the blackening rate measuring device for film, etc. installed at a suitable location in the automatic processor is integrated by a frequency division counter, and when the blackened area of the film reaches a predetermined value, a signal is output, and the time base oscillator generates a constant signal. A constant flow solenoid valve is opened to replenish the developer tank until the number of pulses corresponding to the developer replenishment time set in advance by the preset counter is reached. In an automatic developer activity management device that replenishes the solution later, an emergency power source is provided in parallel with the regular power source of the device, and the output of the power failure detector is used to control the frequency division counter and the preset counter. A method for storing data during a power outage, etc. in an automatic developer activity management device for an automatic processor, characterized by blocking input from the developer.