JPS6011351B2 - Copy paper forced ejection device in a copying machine - Google Patents

Description

[Detailed Description of the Invention] In a copying machine that performs the copying cycle by electrical control rather than cam control, if the power is turned off for some reason such as a power outage or malfunction during the copying cycle, the power is turned on again and a new copy is made. Even if the cycle starts, an error occurs in the sequence because there is copy paper inside the machine that was stopped during the previous copy cycle.

For example, paper inside the machine may activate an ejection detection switch, causing the machine to stop operating in the middle of the copying cycle. SUMMARY OF THE INVENTION The present invention aims to eliminate such inconveniences and provide a forced copy paper ejection method that allows paper remaining in the machine to be ejected without causing abnormalities in new sequence control.

Hereinafter, the present invention will be explained according to specific examples shown in the drawings.

The accompanying drawing is a circuit diagram showing an embodiment of the forced ejection device according to the present invention. This forced ejection device is used in the following copying machines,
That is, a roll-shaped copying machine is cut into an appropriate length, for example, A4 size, and the sheet-shaped copy paper thus formed is subjected to a series of copying operations, such as charging, exposure, and development, and the resulting copy product is produced. , is used in a copying machine that discharges copies onto a paper discharge tray provided outside the machine. In the figure, 10 is a ratchet relay, which is set via transistor 7 by cut signal C from cut switch SW, and reset via OR circuit 8 and transistor 9 by discharge detection signal E from discharge detection switch SW2. be done. Here, the cut switch SW is a switch that operates simultaneously with the cutting operation to generate a cut signal C when a roll of copy paper is cut into an appropriate length. A switch is used that is placed so that it can detect the movement of the Further, the ejection detection switch SW2 is activated to generate an ejection detection signal E when the above-mentioned copy that has completed the copying operation is ejected into the paper ejection tray. A switch is provided near the exit of the machine body and is capable of detecting copies passing through this section. Once set, this ratchet relay 10 will not operate again unless reset by signal E.
It remains set even if the voltage applied to the relay coil is interrupted. 12 is a timer for forced ejection, and this timer is NAND when the print signal P is generated while the ratchet relay 10 is set.
Triggered via gate 1 1.

The timer 12 is followed by a driver stage 14 of a relay 15 for driving a motor for forced ejection. Generally, roll-shaped copy paper is subjected to a cutting operation and a series of subsequent copying operations while being moved on a conveyance system consisting of a belt, loaf, etc. installed in a copying machine. In addition to the above motor, it is possible to drive the above-mentioned copy paper transport system independently of a series of copying operations.Therefore, if only the forced ejection motor is operated without performing any copying operations, The copy paper passes through the machine and is ejected to the paper output tray without undergoing any copying operations.This forced ejection motor is separate from the copying motor that drives the paper conveyance system in synchronization with the copying operation. However, it is also possible to use one motor to perform both of the above functions.In the case of a normal copying cycle, the ratchet relay is set by the 1st river cut signal C, and then reset by the discharge detection signal E. has been done.

That is, the ratchet relay contact 10' inserted between one input terminal of the NAND gate 11 and the positive wire bus is open. Therefore, even if you press print switch 1 to start the next copy cycle, inverter 2
The other input of the NAND circuit 11 connected to the NAND gate 11 only becomes H level, and the output of the NAND gate 11 does not change. Therefore, the forced discharge timer 12 and therefore the motor drive relay 15 do not operate. A roll of copy paper was cut into sheets due to a finger command, and after the sheets of copy paper fought against the copy paper conveyance system, there was an accident where the power supply was interrupted, such as a failure of the commercial power supply, or an input cord was inadvertently disconnected. In this case, the ratchet relay 10 remains activated and the contacts 10' are closed. When the power is restored in this state, the H input remains applied to one input terminal of NAND I through its associated contact 10'. When the print switch 1 is turned on in this step, the following inverter 2 is connected to the switch.
The output of the NAND gate 11 becomes H level, and the output of the NAND gate becomes L level.

This triggers the timer 12, and its output terminal becomes H level, which is applied to one input terminal of the AND gate 13. The other input terminal of this AND gate 13 is connected through a delay circuit consisting of a resistor 3 and a capacitor 4 to the 0 output terminal of a flip-flop 6 which is set by the print signal P. Therefore, immediately after pressing the print switch 1, the flip-flop 6 has not yet been set and the 0 output terminal is at the H level. Therefore, both inputs of AND gate 13 are at H level, and the output of this gate 13 is also at H level. This results in
The motor drive relay 15 is activated, and the copy paper transport system is driven regardless of the copy sequence, thereby sending out the paper inside the copying machine toward the paper discharge tray. AND gate 1
3 is output from the delay circuits 3 and 4 and the flip-flop 6.
is applied via an inverter 16 to one input terminal of an AND gate 5 provided between the two.

That is, when the output of the AND gate 13 is at H level, the D flip-flop 6 remains reset, thereby setting the flip-flop 6 and prohibiting it from entering a normal copy cycle. Further, the output terminal of the timer 12 is connected to the other input terminal of the OR circuit 8, so that the ratchet relay 10 is restored at the same time as the timer 12 is activated. This is ratchet relay 1
This is because as long as 0 is set, even after forced ejection is completed, the forced ejection circuit will operate every time the print switch is turned on again, and you will never be able to enter the copying cycle directly. be. Furthermore, when the flip-flop 6 is in the copy cycle command operation, that is, in the setting operation, one input terminal of the AND gate 13 is set to L level by the 0 output of the flip-flop 6, so even if the timer 12 malfunctions, the forced ejection circuit is no longer working. The resistor 3 and capacitor 4 of the delay circuit are provided in order to obtain time to determine whether the ratchet relay I0 is set after the print switch 1 is turned on, and if the ratchet relay I0 is set, the above-mentioned As shown, one input of AND gate 5 is L.
level, and the setting operation of the flip-flop 6 is prohibited. If the ratchet relay 10 is not set, the flip-flop 6 is set with a slight delay after the print switch is turned on, and the copying cycle starts. The delay time in this case is about 10 seconds, which is barely perceptible to the operator. The control device of the present invention uses a ratchet relay to store the presence or absence of paper inside the copying machine, and if there is paper, the normal copying cycle will not start until after the paper is ejected. Even if there is paper inside a copying machine, this does not cause abnormalities in the copying cycle.

Moreover, its forced discharge circuit can be easily constructed. Although a ratchet relay is used in the specific example, it is clear that any memory element that operates in response to a paper cut signal, maintains its operating state regardless of interruption of the power supply, and recovers in response to a discharge detection signal may be used.

[Brief explanation of the drawing]

The figure is a drawing showing an example of a forced discharge circuit according to the control method of the present invention. 1...Print switch, 6...Flip-flop, 1
0...Ratchet relay, 10'...Contact, 11...
... NAND gate, 12 ... Timer, 1
3...AND gate, 15...Motor drive relay, SW.・・・・・・Cut switch, SW2・
...Ejection detection switch.

Claims (1)

[Claims] 1. In a copying machine that cuts a roll of copy paper to make a sheet of copy paper, performs a copying operation while the sheet of copy paper is being conveyed by a paper conveyance system, and then discharges it outside the machine. A copy paper forced ejection device operates in response to a paper cut signal generated when cutting a roll of copy paper, maintains its operating state regardless of power interruption, and discharges the copy paper after copying is completed outside the machine. A memory element that is restored by a paper ejection detection signal generated when the memory element is in operation, a gate circuit that generates an output when a print signal is generated while the memory element is in operation, and a gate circuit that outputs paper transport regardless of the copying operation by the output of the gate circuit. 1. A forced copy paper ejecting device comprising: a paper ejecting means for operating a copy paper ejecting system.