JPH0118320Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a burster for cutting continuous printing paper.

In general, there are various methods for bursters that cut continuous printing paper, but one of them is to sandwich the paper between a pair of in-rollers and out-rollers that have different circumferential speeds, and a blade is installed between these rollers. There are some that cut the paper based on the difference in circumferential speed. In a burster that cuts paper, the cutting mechanism is operated in accordance with the length of one page of the paper to be cut (hereinafter referred to as paper) due to the difference in circumferential speed between each pair of rollers. These will be outlined with reference to FIGS. 1 to 6.

Continuous printing paper 1 discharged from a printing device (not shown) in FIG. It is folded up and deposited. 6 and 16 are guides. It is assumed that the in rollers 3 and 13 feed the paper 1 at the same peripheral speed as the tractor 2, and the out rollers 4 and 14 cut the paper 1 at the position of the blade 7, so the in rollers 3 and 1
Suppose that paper 1 is fed at a peripheral speed slightly faster than paper 1. When a cutting command is issued, when the perforation of the paper 1 comes directly under the blade 7 as shown in Fig. 2, the paper 1 is stopped, the blade 7 and the idle roller 14 are lowered, and then as shown in Fig. 3. By feeding paper 1 to the reference point, rollers 3 and 13 and rollers 4 and 1
The paper 1 is cut due to the difference in circumferential speed of 4, and the cut paper 1 is stacked on the table 8 by feed rollers 5 and 15. Thereafter, the blade 7 and idle roller 14 are raised as shown in FIG. 4, and the same operation is repeated with the next cutting command.

In this way, in the burster which cuts the paper 1 by the difference in circumferential speed between the pair of inner rollers 3, 13 and the outer rollers 4, 14, when the blade 7 and the idle roller 14 are lowered, the perforation of the paper 1 to be cut is Since it is necessary to control the paper so that it is directly below the blade 7, a reference point is provided and the blade 7 and the in-roller 3, 13 mechanism are moved left and right according to the length of the paper to be cut. Blade 7 In-roller 3, 13
If the position of the inner roller 3, etc. is set incorrectly,
If the blade 7 and the in-rollers 3 and 13 are moved left and right with the paper 1 in the paper 13, the reference point will shift as shown in Figs. I had to reconfigure step 1.

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to eliminate the need to reset the paper even when the blade and the in-roller are moved from side to side.

When moving the blade and in-roller left and right, if there is paper between the in-roller and out-roller, the idle roller of the out-roller is temporarily stopped, then the in-roller and blade are moved left and right, and then the out-roller is idle. It is characterized by returning the roller to its original position.

The present invention will be explained with reference to FIG. 7 showing the control section. The ROLL CLS signal is the idle roller 1
This is generated by a sensor (not shown) that detects whether or not the idle roller 1 is rising.
When 4 is falling, the logic value becomes 1.
The BURST DRV signal is a signal that has a logical value of 1 when moving the blade 7 and the in-rollers 3 and 13 in the running direction of the paper 1, and the BURST UNIT information is a signal that has a logical value of 1 when moving the blade 7 and the in-rollers 3 and 13 in the running direction of the paper 1, and the BURST UNIT information is a signal that takes the blade and in-roller for each paper length depending on the settings of the guides 6 and 16. This is a signal indicating the positions of 3 and 13. The unit position detection section 32 determines whether the blade 7 and the inner rollers 3, 13 are at specified positions.

BURST due to operator switch operation, etc.
When the DRV signal becomes a logical value 1, if the blade 7 and the in-rollers 3, 13 are in the position where they need to move, the DRV from the unit position detection section 32 is detected.
The signal has a logical value of 1, and the AND gate 21
opens. On the other hand, when the idle roller 14 is descending, the ROLLCLS signal has a logical value of 1, and when the paper 1 is loaded on the inner rollers 3 and 13, it is the output of the optical sensor 9 that detects the presence or absence of the paper 1. The PA SNS signal has a logic value of 1,
The NAND gate 24 opens, a ROLL OPN DRV signal is output, and the idle roller 14 is driven upward by a drive system (not shown), while at the same time the AND gate 22 remains closed. on the other hand
ROLL OPN Idle roller 1 by DRV signal
4 rises, the ROLL CLS signal goes to a logic 0, NAND gate 24 is closed, AND gate 22 is opened, and flip-flop 28 is set. As a result, the Q output of the flip-flop 28 becomes a logical value 1, and the unit position detection section 3
With the signal from 2, the blade 7 and the inner roller 3,
The motor 3 moves the blade 7 and the inner rollers 3, 13 to the left or right via the amplifier circuit 29 according to the R/L signal that determines the direction of movement of the blade 7 and the inner rollers 3, 13.
0 is driven. The encoder 31 directly connected to the motor 30 controls the blade 7 and the inner roller 3,
13 is detected and the blade 7 and the inner rollers 3, 13 move to the predetermined positions, the DRV signal from the unit position detection section 32 becomes a logical value of 0,
At the same time as the AND gate 21 is closed, the flip-flop 28 that was driving the motor 30 is reset via the inverter 25, and the flip-flop 28 that drives the motor 30 is reset.
0 stops. At the same time, the idle roller 14
is in the raised position and the ROLL CLS signal has a logic value of 0.
Therefore, the AND gate 23 is opened via the inverter 26, the flip-flop 27 is set via the differentiating circuit 33, and ROLL CLS is set.
The DRV signal is output and the idle roller 14 is driven downward. When the idle roller 14 descends and comes into contact with the paper 1, the ROLL CLS signal becomes a logic 1, the flip-flop 27 is reset, the ROLL CLS DRV signal disappears, and the downward drive of the idle roller 14 is stopped.

Note that if the optical sensor 9 does not detect the paper 1 and the BURST DRV signal that instructs the movement of the blade 7 and the inner rollers 3 and 13 becomes a logical value 1, the PA SNS signal from the optical sensor 9 becomes a logical value. 0, the NAND gate 24 does not open and the ROLL that drives the idle roller 14 upward
OPN DRV signal is not output, flip-flop 28
is set, the blade 7 and the inner rollers 3, 1
A motor 30 is driven to move 3 from side to side.
When the blade 7 and the inner rollers 3, 13 reach the predetermined positions, the DRV from the unit position detection section 32 is detected.
Even if the signal becomes a logical value of 0, the idle roller 14
is falling, the ROLL CLS signal has a logic value of 1, and since one input and output of the AND gate 23 have a logic value of 0 via the inverter 26, the differentiating circuit 33 does not operate and the flip-flop 27 is not set and the ROLL CLS DRV signal is not output.

In this way, the blade 7 and the inner rollers 3, 13
If there is no paper 1, it is not necessary to move the idle roller 14 up and down, and only the blade 7 and the in-rollers 3 and 13 are moved.

If there is paper between the blade and in-roller,
The idle roller of the out roller is retracted from the paper, and then the blade and inner roller are moved, so the paper does not move with the inner roller, and the next job can be carried out without having to reset the paper. effective.

[Brief explanation of the drawing]

1 to 6 are side views showing the schematic structure and cutting sequence of the paper cutting device, and FIG. 7 is a block diagram showing one embodiment of the control section of the burster of the present invention. In the figure, 1 is paper, 2 is a tractor, 3 to 5,
13-15 are rollers, 6 and 16 are guides, 7 is a blade, 8 is a table, 9 is an optical sensor, 21-
23 is and gate, 24 is nand gate, 2
5 and 26 are inverters, 27 and 28 are flip-flops, 29 is an amplifier, 30 is a motor, 31 is an encoder, 32 is a unit position detection section, and 33 is a differential circuit.

Claims (1)

[Claims for Utility Model Registration] An in-roller and its idle roller that feed the paper between them, an out-roller that is provided in front of the in-roller in the paper running direction and rotates at a circumferential speed faster than the circumferential speed of the in-roller, and an outroller that is always located above the in-roller. The blade includes an idle roller that descends during cutting, and a blade that is provided between the in roller and the out roller and is movable in the paper running direction together with the in roller and its idle roller, The burster cuts the paper by applying tension to the paper by speed difference, and includes a moving motor with an encoder that moves the unit consisting of the inner roller, its idle roller, and a blade along the paper feeding direction, and a motor for each paper length. unit position detection means which receives position information and encoder pulses indicating the position of the unit and generates a unit drive signal and a unit movement direction signal when the unit is not in a predetermined position; A sensor detects whether the out roller is in the up or down position and generates a raise position signal or a lower position signal, respectively, and a lower position signal of the sensor when a movement command signal of the unit is generated to determine the idle of the out roller. a first logic means for generating a signal for driving a vertical motor for moving the roller up and down in an upward direction; and a first logical means for generating a signal for driving a vertical movement motor in an upward direction; a second logic means for generating a drive signal to drive the unit and stopping the generation of the drive signal when the unit drive signal of the unit position detection means disappears; A burster comprising third logic means for generating a signal for driving the motor in a downward direction.