JPS63121864A - Controller for copying machine - Google Patents

Abstract

PURPOSE:To prevent copying operation from being interrupted owing to a jam by checking whether or a machine is used for a constant time at off time, and then controlling the machine. CONSTITUTION:It is checked whether or not the contents of a timer register is 0; when 0, an RET is made and when not, -1 is added to the value of the timer register and then it is checked whether or not the value of the timer is 1. When 1, that means a timeover state and a relay RL is turned off. When the timer starts after OFF time in the presence of an operator's input signal, e.g. an ON signal of an operation key, a door OPEN signal, or an in-copying- operation signal, the time of the timer is initialized by this routine. Consequently, when the copying operation is continued after the OFF time, the operation key, etc., is only turned on within a specific time to evade OFF operation. Consequently, the copying operation is not interrupted.

Description

[Detailed Description of the Invention] (Technical Field) The present invention has a daily timer and a weekly timer,
The present invention relates to a control device for a copying machine that turns on and off the power at a set time.

(Prior art) Traditionally, daily timers (timers that set the power on time in the morning and power off time in the evening), weekly timers (in addition to turning on and off in the morning and evening, turning on and off depending on the day of the week, such as turning off on Saturdays and Sundays) (a timer with the function of
Copying machines that are easy to operate, prevent the risk of forgetting to turn off the power, and shorten warm-up time are already known.

By the way, in the case of a copying machine having a function of automatically turning on and off the power in this way, conventionally the power was turned off uniformly at the set off time, which caused problems in the following cases.

(11) If you turn it off during copying, the paper will jam.

(2) If the copier is turned off when there is an abnormality, it becomes unclear why the abnormality is occurring.

(3) If the switch is turned off during an interruption such as when paper ends, toner ends, or the stop key is pressed, copying operations cannot continue.

(Purpose) The present invention was made based on this background,
It is an object of the present invention to provide a copying machine that eliminates the above-mentioned inconvenience when the power is turned off by a timer.

(Structure) For this purpose, the present invention is characterized in that when the off time comes, it is checked whether the machine will be used for a certain period of time or not, and the machine is controlled to prevent any trouble from occurring in the copying operation. It is something.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows a circuit diagram of a copying machine.

When power 2 is supplied by main switch 1, control circuit 3 is activated and relay (RL) 4 is turned on. Relay R
When L turns on, contacts RL-1 and RL-2 close,
The load (
Power is supplied to L I , L 2--.L,).

There are various loads on a copying machine, such as the main motor for transporting the copying machine, the heater for the fixing section, the illumination lamp for copying the original onto the drum, the scanner motor, and the developing motor for developing it. , and various chargers. Among these, those driven by AC power supply are controlled by 5SR5, and those driven by DC power supply 6 are controlled by transistor 7. The control circuit 3 controls these loads (L is a DC load) to perform copying operations.

Next, a block diagram of this control circuit 3 is shown in FIG. The control circuit 3 is composed of a microcomputer consisting of a CPU 31, ROM 32, and RAM 33, reads input signals 34 from sensors, switches, keys, etc. via an input port 35, and uses these signals to send control signals to the load via an output port. It is now possible to send These controls are performed by program codes written in the ROM 32.

The keys include a timer key, a 10 key, and an enter key, which will be described later. Inside the RAM 33 there is an F which will be described later.
Part that stores flags from GI to 5, ON time data A, OFF time data A, ON time data B, OFF
A portion for storing time data B is allocated. In addition, the clock pJIIC can be read and written directly from the CPU 31.
37 is set, and this clock IC37 is backed up by a battery, and when the main switch is turned OFF.
Even in the case of F, the power for the watch IC 37 is still supplied by the battery. Therefore, the current time can be determined by reading the current time from the clock IC 37 by the CPU 31.

Next, the Wi control operation will be explained according to the flowcharts shown in FIG. 3 and below.

First, subroutine 5UBI in FIG. 3 will be explained.

This is a program for setting the mode in which ON time and OFF time data can be entered using the timer key. First, when you turn on the timer key, FGI is set,
Enter data input mode.

At this time, FG2 is set to O to set ON time input mode. In addition, Fe2 is set to O to enter the input state from the first digit.

Note that FGI is a flag indicating the input mode of ON time and OFF time.

Fe2 indicates whether it is an ON time input mode or an OFF time input mode.

ONN time nested mode when Fe2=O OFF time when G2=1 Input input field FG3 is a flag for determining the digit when inputting 10 key data.

When Fe3=0, it indicates the input of the first digit.

When Fe3=1, it indicates input of the second or higher digit.

5UB2 shown in FIG. 4 will be explained.

This is to input data into ON time and OFF time data A ("A" is the primary data storage buffer) using the 10 key. First, Fe1=1
If so, it is in input mode, so check the input of the 10 keys. If the 10 key is ON, check Fe2 next. Initially, Fe3=0, so it is the first digit input.

Next, check Fe2, and initially Fe2=0
Therefore, the value of the 10 key (0~
9) is entered, and F is entered in the 2nd, 3rd, and 4th digits (F is 16
In decimal notation, it is 1111 in binary). Then, FG3 is set to 1 and the completion of inputting the first digit is stored. Then, when the 10 key is turned on next time, since FG3 is 1, the second and subsequent digits will be input. For input after the second digit, if the fourth digit is no longer F, it means that up to the fourth digit has been input, so the data of the fourth digit is checked. If the 4th digit is F, copy the 3rd digit to the 4th digit, move the 2nd digit to the 3rd digit, move the 1st digit to the 2nd digit, and enter the 10 key data in the 1st digit. In this way, four-digit data is input. 4
The meaning of the digits is that the upper two digits represent the hour and the lower two digits represent the minute. OF
The F time data A is also input in the same way as the ON time data A when FG2=1.

Next, 5UB3 shown in FIG. 5 will be explained.

This is a program that determines whether the value of data A is valid data or invalid data, and if it is valid data, it is transferred to data B. When the enter key is turned on, ON time data A is checked if FG2=O. The specific judgment of this check is described below.

Hour data 00-23, minute data 00-59, this range is considered valid data. Furthermore, data during ON time - OFF time is invalid.

If the data is valid, move it from data A to data B, and
2←L to set the OFF time setting mode, and FG3←O
to enter input mode from the first digit. The input of the OFF time is also the same as the input of the ON time. However, after entering the OFF time, set FGI-0 to cancel the timer setting mode.

Next, 5UB4 shown in FIG. 6 will be explained.

This is a program for comparing the current time, ON time, OFF time, and ON operation. Prioritize and check the ON time, and if the ONN time data is the current time, check if the relay is OFF, and if it is OFF, turn it ON.

Next, if ON time≠current, compare OFF time and current,
If OFF time - current, check relay ON,
If it is ON, start the timer. To start the timer, data corresponding to a predetermined time (T
) by writing.

Next, 5UB5 shown in FIG. 7 will be explained.

This is a program that is turned off when a timer expires. Check whether the timer register is 0, and if it is 0, the timer has not started, so R
ETL, if not O, set timer register to -1
and check whether the timer's input is 1. If it is 1, it means time over and relay RL is turned off.

Finally, 5UB6 shown in FIG. 8 will be explained.

This means: After the OFF time (after the timer has started), an input signal due to an input signal, e.g.
If there is an input signal, such as a signal that turns on the copy key, number of copies set key, mode set key, etc., a door 0PEN signal, or a copying operation signal, and the timer is in star 1-, the timer is set to the initial setting. This is a routine that performs 1-. As a result, if you want to turn off the OFF time picopy operation, you can prevent it from turning OFF by turning on the operation key or the like within a predetermined time.

(effect) The present invention is as described above, and according to the present invention, (1) There is no interruption in copying operations.

(2) Preventing the cause of an abnormality in the copying machine from becoming unknown.

(3) The copying operation can be continued even when the copying operation is interrupted.

It has the following effects.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of the entire copying machine according to the present invention, Fig. 2 is a block diagram of the same control circuit, Figs. 3, 4, 5, 6, 7, and 8. The figure is a flowchart showing each control subroutine. Figure 1 Prisoner 3 Figure 5 Figure 6

Claims (1)

[Claims] In a copying machine that has on-time, off-time setting means, means for knowing the current time, and means for comparing these, and has a function of automatically turning on and off the power at the set time,
As a result of the comparison by the comparison means, if the time coincides with the off time, the timer is started from that time, and if an input signal is input by turning on an operation key or by opening a door before the predetermined time elapses, the timer is started. restart it,
A control device for a copying machine, characterized in that the timer is turned off when a predetermined time elapses, and turned on when the timer coincides with an on time.