JPS5941580B2 - Copy machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying machine that can make a single copy even when the copy number setting display is 0.

Conventionally, copying machines have been equipped with push buttons 0 to 9 as shown in Fig. 1, and push-button copy number setting devices have been used to display the number of copies set in a display window by pressing buttons a. is used.

Note that c is a count display window that displays the number of copies that have been made, d is a print button, and e is a clear button that returns the set display window to "00". Now, for example, if you set the number of copies to ``15'' and make a copy, the next time you make a copy, press the clear button e to return the number of copies to ``00,'' and then press button a to set the next number of copies. The operation becomes complicated.

For this reason, some copying machines are designed to automatically return the display of the previous set to "00" after a certain period of time after the end of copying. With this configuration, when copying is to be performed next time, there is no need to use the clear button e to return the set display to "00", and it is only necessary to set the desired number of copies using the push button a. However, in such a system, even if the print button d is pressed while the set number, that is, the set display remains "00", copying cannot be performed.

Generally, the setting number of copies that is most frequently used is ``00'', so in such a case, if you can make a single copy without pressing the setting pushbutton a and with ``00'' still displayed, then the operation is simplified and very convenient. The present invention focuses on this point, and provides a copying machine in which the copy number setting display becomes "00" after a certain period of time after copying is completed.
Even if the display remains as "00", only one copy can be made in the same way as when the display is "01".

Examples of the present invention will be described below.

FIG. 2 shows one embodiment of the present invention, which includes a programmer 1, an inverter 2, NAND gates 3, 4, 5, a flip-flop 6, a paper detection switch 7, a delay circuit 8, an inverter 9
It consists of 10 is a print switch for starting copying, 11 is a motor, and 12 is its driving circuit.

The programmer 1 outputs an L level signal to line A when the copy set display is "O1" or higher, and outputs an H level signal to line A when the copy set display is "00". On the other hand, when the copy set display and copy count display match, line J
An L level signal is output at certain times, and an H level signal is output at other times. the inverter 2;
The NAND gates 3 to 5 and the delay circuit 8 are connected to the output of the programmer 1 and the paper detection switch 7, 0N, . 0FF
The flip-flop 6 is reset accordingly, thereby forming a logic circuit for controlling the motor 11 (details of which will be described later). First, the copy set display is “0”.
1" (see the timing chart in Figure 3), at time TO, programmer 1 outputs an L level signal to line A and an H level signal (inconsistency) to line J. Therefore, line B is set to L level by inverter 2 and NAND gate 3.

The paper detection switch 7 disposed along the paper conveyance path is configured to turn ON when paper is present on it, and is in the OFF state at this point because no paper is present. Therefore, line M is at H level, and therefore line C is at H level. Therefore, both lines D and E are H.
level. As a result, an H level is input to the set input R side of the RS-flip-flop 6. Also, since the print switch 10 is open, the Q output of the RS-flip-flop 6 is at the H level, and the inverter 9 causes the line F to be at the L level. Therefore, the motor, drive circuit 1
2 is not energized, and the main motor 11 is stopped. In this state, when the print switch 10 is pressed at time t1,
The S input of the RS-flip-flop 6 is set to the L level, the line F becomes the H level, the main motor 11 is rotated by the motor drive circuit 12, and copying is started. Then, at time T2, when the transfer paper comes to the position of switch 7, this is closed, and the signal is input to programmer 1 through line K, and the count becomes 01, which matches the set display, so the output of line J goes to L.
level, line B goes to H level, line D goes to L level, and line E goes to L level after a certain period of time (the time required for the paper to be ejected) δ (after the end of the copying cycle) due to the delay circuit 8. Therefore, RS 1st, 1st, 6th, and 6th set. The delay circuit 8 is provided to extend the stop time of the drum, and the paper is ejected during this extended time. As a result, the Q output becomes H level and the line F becomes L level, so the main motor 11 stops. Note that the set display returns to "00" after a certain period of time ε, so line J becomes H level. Next, if the copy set display is “00” (
(See timing chart in FIG. 4) is time T.

In this case, programmer 1 outputs an H level signal to line A, and a L level signal to line J (if the signal on line J is displayed as "00" and is not actually copied, there is a match signal).゛L゛), line B
is at H level. On the other hand, since line M is also at H level, line C is at L level. Therefore, lines D and E
becomes H level. This causes the copy set display to change to
1'', the line F is at the L level and the main motor 11 is stopped. In this state, when the print switch 10 is pressed at time t1, R
The S-flip jack 6 is set, the line F becomes H level, the main motor 11 rotates, and copying is started. Then, at time T2, when the transfer paper steps on the switch r, the signal causes the line M to go to L level. At this time, line A is at H level, so line C goes to H level, and line B maintains H level, so line D goes to L level.
becomes L level, flip-flop 6 is reversed in the same way as described above, line F becomes L level, and main motor 11
stops. When the transfer paper passes switch 7, line M
returns to H level, and lines C and D each return to LlH level accordingly. Incidentally, since copying is performed at time T2, the count display and set display become inconsistent, and line J becomes H level, but line A remains at H level, so the level of line B does not change. As a result of the above, even if the copy set display is "00", "O1" is displayed.
'', you can press the print switch to make a single copy.

As described above, the present invention can make only one copy even when the copy number setting display is O, and can efficiently make one copy from the same document that is most frequently used.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the control panel of the copying machine, Fig. 2 is a circuit diagram of one embodiment of the present invention, Fig. 3 is an operation timing chart when the number of copies setting display is "O1", and Fig. 4 is an illustration of the control panel of the copying machine.
The figure is an operation timing chart when the copy number setting display is "00". 1...Programmer, 6...Flip-flop, 7...Paper detection switch, 8...
...Delay circuit, 10...Print switch, 1
1...Motor, 12...Motor drive circuit.

Claims (1)

[Claims] 1. In a copying machine in which the number of copies is set and displayed by a push button, and the number of copies set and displayed is returned to 0 after a certain period of time after the set and displayed number of copies has been completed, it is arranged along the paper conveyance path. a paper detection switch that generates a paper detection output in response to the passage of paper;
The paper detection output is supplied, and this is counted as the number of copied sheets, and the binary value becomes the first level when the copy set display is 0, and the second level when the copy set display is 1 or more. 1 signal, and when the copy set display and the copied count number match, the 2nd signal
level, otherwise it is the first level 2
A programmer that generates a second value signal, a flip-flop that drives a motor of a copying machine by its output when set and stops the motor of the copying machine when reset, and a print for setting the flip-flop. a switch, and a logic circuit having inputs connected to the output of the programmer and a paper detection output, the output of which resets the flip-flop, the logic circuit having an inverted signal of the first signal and a first a first AND circuit that calculates an AND with two signals, a second AND circuit that calculates an AND of the first signal and the paper detection output, and each of the first and second AND circuits. an OR circuit that calculates a logical sum of outputs, and the output of the OR circuit is supplied to the reset terminal of the flip-flop after being delayed by the necessary time from when the paper passes through the paper detection switch until it is ejected. 1. A copying machine comprising a delay circuit.