JPS5810238B2 - Printing device control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a printing device having a paper processing device.

FIG. 1 shows a schematic configuration of a printing device having a paper processing device.

The printing paper 11 that is intermittently fed by the tractor 12 within the printing device 10 is moved by the printing hammer 13 and the type carrier 1.
The paper is printed in the printing unit consisting of 4, and then sent into the paper processing device 20, pulled by the paper feed roller 21,
The paper is folded along the folds and placed on the paper table 26.

When the amount of printing paper 11 on the paper tray 26 increases, the microswitch 25 is operated by the end surface sensor 24, and the paper tray 26 is lowered via the motor 28 and the belt 29, and the paper tray 26 is lowered. The distance between the top surface of the paper and the paper feed roller 21 is maintained at a predetermined value.

When the printing for one job (one job) is completed and the page reaches the end of the page or the position of the canter 15, it is cut by the cutter 15, and is placed on the paper tray 26 via the paper feed roller 21 as shown in FIG. sent.

The trailing edge of the paper is detected by the start and end sensor 22, and the microswitch 23 is operated to move the paper tray 26 through a drive means (not shown) to move the printing paper 1 thereon as shown in FIG.
Eject 1.

After the printing paper 11 is discharged, the paper tray 26 is closed as shown in FIG. 4, and is further raised by the motor 28 and belt 29 to return to the initial position.

When the paper tray 26 returns to its initial position as shown in FIG. 5, the microswitch 2γ is activated and the motor 28 is stopped.

Printing and paper feeding operations cannot be started until the series of operations from cutting the paper to returning the paper tray 26 to its initial position is completed, making it impossible to improve the throughput of the printing device.

That is, there is a disadvantage that the processing time is increased by the time from when the next printing or paper feeding operation is started until the starting edge of the paper 11 reaches above the paper tray 26 and is detected by the starting edge end sensor 22. there were.

In addition, if you start printing and paper feeding immediately after cutting the paper, the starting edge of the paper may reach the top of the paper tray before the paper tray returns to its initial position, and in this case, the folding may not be complete. This may cause a paper jam.

An object of the present invention is to eliminate the above-described drawbacks of the prior art, improve processing capacity, and prevent paper jams.

For this reason, the present invention aims to improve processing capacity by starting printing and paper feeding operations immediately after cutting the paper, and
When the starting edge of the paper reaches above the paper tray before the paper tray returns to its initial position, printing and paper feeding operations are stopped to prevent paper jamming.

FIG. 6 is a block diagram showing an embodiment of the control device of the present invention, in which the signal FOR is a reset signal generated when the power is turned on, the signal PAST-PLS is a pulse signal instructing to start paper feeding operation, and the signal PA5TOP is a The pulse signal (PAPERFEED) which instructs the end of the paper feeding operation is a level signal which instructs the paper feeding operation.

Further, the microswitch 23 falls to the W side when the paper 11 has entered the start/end sensor 22 as shown in FIG. 9, and falls to the Y side when the paper 11 is out of the start/end sensor 22 as shown in FIG. .

Further, the microswitch 27 tilts toward the Y side when the paper tray 26 is at the initial position, and tilts toward the Z side when it is not at the initial position.

The operation shown in FIG. 6 will be described below from the point in time when the power is turned on, the paper 11 is loaded into the tractor 12, and the printing operation is started.

At this time, it is assumed that the paper tray 26 is at the initial position.

Therefore, the microswitch 27 is tilted to the Y side, the flip-flop 31 is set, and the flip-flop 3
2 is reset by the reset signal FOR.

When one line of printing is completed and a pulse signal PAST PLS instructing to start paper feeding operation is generated, the flip-flop 33 is set, the AND gate 39 opens its gate, the flip-flop 34 is set, and the level signal PAPERFEED is set. This occurs and the paper is fed.

As the paper feed progresses and the pulse signal PASTOP is generated, the flip-flops 33 and 34 are reset and the paper feed operation ends. 23 is turned to the W side and the flip-flop 30 is set.

At this time, the paper tray 26 is still in its initial position and the flip-flop 31 remains set, so the AND gate 37
will not open the gate.

Therefore, since the flip-flop 32 maintains the reset state, the O-side output of the flip-flop 32 acts to open the Nant gate 39.

That is, even if the starting edge of the paper 11 reaches the starting edge/terminating edge sensor 22, it does not affect printing or paper feeding operations in any way.

The following description assumes that the printing and paper feeding operations further proceed and the cutter 15 operates.

At this time, it is assumed that the paper tray 26 has a large amount of paper on it and is lowered as described above, and the microswitch 27 is tilted toward the Z side.

When the paper 11 is cut by the cutter 15, the paper 11
is pulled out by the paper feed roller 21, and the end of the paper 11 passes through the paper feed roller 21, resulting in the state shown in FIG.

Since the paper 11 is removed from the start/end sensor 22, the microswitch 23 falls to the Y side.

At this time, flip-flop 30 is reset, and since Nantes gate 38 opens its gate, flip-flop 31 is also reset.

Therefore, AND gate 37 does not open its gate and flip-flop 32 also remains reset.

Therefore, the Nantes gate 39 can be opened and the next printing and paper feeding operation can be started.

That is, printing and paper feeding operations can be started immediately after cutting the paper.

On the other hand, when the paper 11 is removed from the start/end sensor 22, the paper tray 26 opens as described above and discharges the paper placed on its upper surface as shown in FIG.

When the next printing and paper feeding operation progresses and the starting edge of the paper 11 reaches the starting/ending edge sensor 22, the microswitch 23 is turned to the W side and the flip-flop 30 is set.

At this time, if the paper tray 26 has not returned to its initial position as shown in FIG. Flip-flop 32 is set.

When the flip-flop 32 is set, the Nantes gate 3
9 does not open its gate, the flip-flop 34 is not set and the paper feeding operation is stopped.

That is, printing and paper feeding operations are stopped.

When the paper tray 26 returns to its initial position as shown in FIG. 10, the microswitch 21 falls to the Y side and the flip-flop 31 is set.

When the flip-flop 31 is set, the monomulti 36
The flip-flop 32 is reset via the Nant gate 39 to open the gate 39, so that the stopped printing and paper feeding operations are restarted.

After cutting the paper, the next printing and paper feeding operations proceed, and when the starting edge of the paper 11 reaches the starting/ending edge sensor 22, if the paper placement table 26 has returned to the initial position, the microswitch 27 has fallen to the Y side. Therefore, the flip-flop 31 is set, and the Nantes gate 31 will not open its gate.

As a result, the flip-flop 32 is not set, so printing and paper feeding operations continue without being stopped.

As described above, according to the present invention, the next printing and paper feeding operations can be started immediately after cutting the paper, so that processing capacity can be improved.

Furthermore, when the starting edge of the paper reaches the upper blade of the paper tray before the paper tray returns to its initial position, the printing and paper feeding operations are temporarily stopped, thereby preventing the occurrence of paper jams.

In the above explanation, the paper tray 26 is opened and the paper 1 is
1, the ejection force method can be modified in various ways.
As in No. 133469, the paper may be ejected by simply lowering the paper tray 26.

[Brief explanation of the drawing]

FIG. 1 is an internal side view showing a printing device having a paper processing device, FIGS. 2 to 5 are explanatory diagrams showing the operation of the prior art, and FIG. 6 is a block diagram showing an embodiment of the control device of the present invention. , 1 to 10 are explanatory diagrams showing the operation of the present invention. In the figure, 10 is a printing device, 11 is a printing paper, 12 is a tractor, 13 is a printing hammer, 14 is a type conveyor, 15 is a cutter, 20 is a paper processing device, 21 is a paper feed roller, 22 is a start/end sensor, 23 , 25°27 is a microsinch,
24 is a paper top surface sensor, 26 is a paper placement table, 28 is a motor,
29 is a belt, 30-34 are flip-flops, 35.
36 is a monomulti, 37 is an AND gate, and 38.39 is a Nante gate.

Claims (1)

[Claims] 1. A paper tray on which sheets of paper released from the printing section are placed and folded along the folds thereof, a paper feed roller provided above the paper tray and feeding the paper from the printing section to the paper tray, and the paper feed roller. A starting edge sensor and a trailing edge sensor are provided between the paper tray and detect the arrival of the paper starting edge and the passage of the trailing edge of the paper; a drive means for vertically moving the paper tray; and a driving means provided near the initial position of the paper tray; a paper tray sensor that detects whether or not the paper tray is at the initial position; a paper top surface sensor that detects the amount of paper on the paper tray and lowers the paper tray via the drive means when the amount of paper on the paper tray is greater than a predetermined value; and the paper feeder. A cutting device is provided between the roller and the printing unit, and includes a cutting device that cuts the paper after one job is completed, and a discharging device that discharges the paper on the paper tray after cutting the paper by the cutting device, and removes the paper on the paper tray. In a printing device configured to return the paper tray to the initial position after ejection, the paper tray sensor receives the outputs of the paper tray sensor and the start and end sensors, and generates a signal that enables printing after cutting the paper and paper feeding operation. Before a signal indicating that the paper has returned to the initial position is generated, a control means is provided that generates a signal to stop printing and paper feeding operations when the start and end sensors generate a signal indicating that the paper has reached the starting edge, and the paper is cut. A control device is characterized in that printing and paper feeding operations can be started immediately after printing.