JPS5844121Y2 - paper folding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper folding device for controlling the folding of continuous printing paper used in a printing device such as a line printer using a pendulum-operating swing fin, and folding and stacking the continuous printing paper alternately front and back on a paper holder.

As is well known, in such a paper folding device, the swing fin is driven in accordance with the paper folding length, so that the paper coming out through the swing fin is guided in the direction of the fold line, and the folding operation is performed continuously. It is something that is carried out.

Control methods for moving the swing fins in accordance with the paper folding length include a method in which a signal related to paper feed is sent from the printing device to the paper folding device and control is performed based on that signal, and a method in which the paper feed amount is detected within the paper folding device. There is a method in which a means is provided and control is performed based on the detected paper feed amount.

In the former control method, when the printing device performs a paper feeding operation, a signal related to paper feeding is sent to the paper folding device, so that the swing fin operates and the paper folding operation is executed.

However, if a paper end state occurs or if the paper is cut midway in order to replace the paper, the swing fin does not operate because a signal related to paper feeding is not generated.

Therefore, in this case, there was a drawback that good folding was not guaranteed.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to operate the swing fins even when the end of the paper reaches the paper folding device without generating a signal related to paper feeding. The goal is to fold the paper well to the end within the paper.

A feed roller is provided in the paper folding device for feeding the paper discharged from the printing device into the paper folding device.

If the end of the paper goes into the paper folding device,
The paper is fed into the paper folding device by this feed roller.

Set the feeding speed of the paper by the feed roller to L inches 7
seconds, and the number of pulses related to paper feed that occur when paper feed is executed by the printing device is m///1' inches, then the number of pulses related to paper feed that occur in one second is Assuming N1, N=L (inch 7 seconds) x m(
In other words, when the end of the paper is pulled by the feed roller and enters the paper folding device without generating a signal related to paper feed, the number of pulses related to paper feed is L m This is equivalent to a continuous paper feed operation that takes '(knot seconds).

Therefore, if the end of the paper is pulled by the feed roller and enters the paper folding device without generating a signal related to paper feed, a pseudo pulse of Lm (seconds) is generated, and the pulse related to paper feed is generated. The swing fin can be operated by making sure that the problem is occurring.

A pseudo pulse of Lm (seconds) can be easily realized by an oscillator with an oscillation period of □seconds.

FIG. 1 is a diagram showing a schematic configuration of a printing device equipped with a paper folding device.

A printing paper 11 consisting of a type carrier 12 and three groups of printing hammers is fed by a tractor 14, passes through a cutting means 15 consisting of a cutter, and is discharged from the printing device 10 into a paper folding device 20.

The paper 11 discharged into the paper folding device 20 is sent to the feed roller 22 via the guide 21, and then fed downward by the feed roller 22 and folded alternately from front to back through the swing fin 23 which operates as a pendulum, and is folded into a paper holder. 24.

Note that 25 and 26 are dancer rollers and microswitches that detect the slack of the paper 11 in the paper folding device 20, and 27 indicates that the starting edge of the paper 11 has reached the feed roller 22 and the ending edge has come off the feed roller 22. A microswitch for detecting
This constitutes a detection means.

Further, 28 is a motor that causes the swing fin 23 to operate in a pendulum manner.

FIG. 2 is a block diagram showing one embodiment of the device of the present invention.

The signal C0NT PLS is a pulse signal generated when a paper feeding operation is executed in the printing device 10.
This is a signal equivalent to (kotsuinchi).

Further, the signal CUT END is a signal generated when the paper 11 is cut by the cutting means 15. For example, when the cutting means 15 is constituted by a movable cutter that runs along the width direction of the paper 11, the signal CUT END is a signal generated when the paper 11 is cut by the cutting means 15. This is obtained from microswitches (not shown) provided at both ends of the travel trajectory.

The microswitch constitutes the first detection means of the present invention, and is for detecting that the paper 11 is removed from the printing device 10.

That is, since the normal paper 11 is often cut to remove it from the printing device 10, it is detected that the paper 11 has been cut and the paper 1 is cut.
1 is torn off from the printing device 10.

The contact point of the microswitch 27 is tilted to the 2 side while the paper 11 is fed to the feed roller 22.

Therefore, the end of the cut paper 11 is placed on the feed roller 2.
If it deviates from 2, it falls to the 1 side and resets the flip-flop 32 set by the CUT END signal via the inverter 31.

The oscillator 33 constituting the generating means of the present invention has a speed L corresponding to the feeding speed L (7 seconds in inches) of the feed roller 22.
m (seconds), that is, a pseudo pulse with a period of 1/Lm (seconds) is generated.

The swing fin control circuit 36 drives the penalty motor 28 in response to the C0NT PLS signal sent via the OR gate 35, and causes the swing fin 23 to perform a pendulum operation.

The paper 11 is cut by the cutting means 15 and CUTEND
When a signal is generated and the flip-flop 32 is set, the AND gate 34 opens, and when the end of the paper 11 comes off the feed roller 22 and the contact of the microswitch 27 falls to the 1 side, the AND gate 34 closes. .

Therefore, during this period, the swing fin control circuit 36
Since the swing fin 23 can be operated in a pendulum manner via the motor 28 in response to the pseudo pulse from the paper 11, it is possible to reliably fold the paper 11 to the end even if a signal related to paper feeding, that is, a C0NTPLS signal is not generated. can.

As described above, according to the present invention, it is possible to reliably fold the paper to the end even if the paper comes off the printing device and a signal related to paper feeding is no longer generated.

Note that in the above description, it is assumed that the paper 11 is removed from the printing device 10 by detecting that the paper 11 is cut. The paper 11 may be removed from the printing device 10 when it is detected that there is no paper 11, and various modifications are possible.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a schematic configuration of a printing device equipped with a paper folding device, and FIG. 2 is a block diagram showing an embodiment of the device of the present invention. In the figure, 10 is a printing device 11 for printing paper, 12 is a type carrier, 13 is a printing hammer, 14 is a tractor, 15 is a cutting means, 20 is a paper folding device, 21 is a guide,
22 is a feed roller, 23 is a swing fin, 24 is a paper holder, 25 is a dancer roller, 26.27 is a micro switch, 2B is a motor, 31 is an inverter, 32 is a flip-flop, 33 is an oscillator, 34 is an AND gate , 35 is an OR gate, and 36 is a swing fin control circuit.

Claims (1)

[Scope of utility model registration request] Continuous printing paper that is dropped from above via a feed roller and has creases at regular intervals is controlled to be folded in the folding direction by a swing fin that operates in a pendulum manner in response to a signal related to the paper feed of the printing device, and placed on a paper holder. In a paper folding device that folds and stacks the front and back sides alternately,
generating means for generating a pseudo signal corresponding to the speed of the feed roller; first detecting means for detecting that the folded paper has come off the printing device; and second detection means for detecting curling, and after the first detection means detects that the paper has come off the printing device, the second detection means detects that the end of the paper has come off the feed roller. A paper folding device in which the swing fin is driven and controlled by a pseudo signal from the generating means until the swing fin is detected.