JP2003326679A - Method and device for controlling band type body cutting position control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control device for a band type body cutting position control device, in which an adjusting roller returns to a normal position in a short time, which enables correct cutting and avoids waste of printing material. <P>SOLUTION: The band type body cutting position control device for controlling the cutting position of a printed band type body has a rotational speed detecting step for detecting the rotational speed of a printing machine, a rotational speed setting step for setting the rotational speed of the printing machine during a regular printing, a controlling step for controlling the band type body cutting position control device corresponding to a signal from the rotational speed detecting step and the rotational speed setting step. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for a strip cutting position control device and a control device for a strip cutting position control device.

[0002]

2. Description of the Related Art A folding machine of a conventional web-fed rotary printing press is shown in FIG. FIG. 8 shows a case where the web 1 is half-folded in the width direction and half-folded in the length direction after cutting. As shown in FIG. 8, the web 1 printed by the printing unit in the rotary printing machine is dried, and then sent to the folding machine to be cut and folded.

That is, the web 1 reaches a drag roller 4 from a guide roller 2 through an adjusting roller (compensator roller 3), and is half-folded in the width direction by a triangular plate-shaped former 5 provided below the drag roller 4 to lead. It reaches the cutting cylinder 8 through the roller 6 and the nipping roller 7. And
After passing through the cutting cylinder 8 and the folding cylinder 9 and reaching the gripper cylinder 10, the paper is cut and folded in the lengthwise direction and discharged by the conveyor 11.

Further, the same printing surface, that is, a so-called pattern 12 is continuously printed on the web 1, and the web 1 must be accurately cut at the boundary between the adjacent patterns 12.
However, the tension of the web 1 is often changed due to the non-uniformity of the physical properties of the web 1, the rotational balance of the mechanical parts, the variation of the load, etc., and the precision of the cutting position is often deteriorated.

Therefore, various cutting position control devices (cut-off control devices) have been developed for the purpose of improving the cutting position accuracy. As an example of this cutting position control device, a cutting reference signal generator 1 provided on the cutting cylinder 8
1 pulse signal per cutting length sent by 3
The detection head 14 provided above the drag roller 4 has a pattern 1
There is a method in which 2 is detected and compared with a signal to be transmitted, and the compensator roller 3 is advanced and retracted in proportion to the amount of deviation to perform correction.

[0006]

In the above-described cutting position control device of the web-fed rotary printing press, the cutting position control device is turned on / off in synchronization with the attachment / detachment of the cylinder of the printing press. Because the position of the compensator roller 3 moves from the position at the time of main printing due to the fluctuation in tension, when performing the main printing again, the correct position of the compensator roller 3 until the compensator roller 3 returns to the position at the time of the previous main printing However, there was a problem that it could not be trimmed in a long time, and that it took a long time and a large amount of printing material was wasted.

For example, as shown in FIG. 7, the tension value of the web 1 decreases as the speed of the printing machine (the number of rotations per unit time) decreases, and as the speed of the printing machine increases. It rises and stabilizes when the speed of the printing machine becomes constant, but the cylinder speed of the printing machine is constant because the cylinder insertion and removal of the printing machine are performed when the speed of the printing machine reaches a predetermined speed. When the cutting position control device is turned on during the period from the time of until the time when the cylinder is unrolled, and before the speed of the printing machine becomes constant from the time when the cylinder is inserted, the tension fluctuation of the web 1 causes
When the position of the compensator roller 3 fluctuates greatly and the printing machine is stopped and then restarted, the position of the compensator roller 3 does not easily return to the position when the speed of the printing machine is constant, and a lot of cut defective paper is generated. Had been generated.

Therefore, since the operator manually corrects the rough position of the compensator roller 3 so that the web 1 can be cut at a precise position quickly, there is a problem that the operator's burden is heavy. The present invention is intended to solve the above-mentioned problems, and depends on whether the rotational speed of the printing press is the rotational speed at the time of final printing or whether the tension value of the web is the tension value at the time of final printing. Then, the cutting position control device is turned on / off.

[0009]

According to a first aspect of the present invention, which solves the above-mentioned problems, there is provided a method for controlling a cutting position control device for a band-shaped material, which is a cutting position control device for a band-shaped material for controlling a cutting position of a printed band-shaped material. In, a rotation speed detection step of detecting the rotation speed of the printing machine, a rotation speed setting step of reading out the set rotation speed of the printing machine at the time of final printing, a rotation speed detected in the rotation speed detection step and the rotation speed setting A control step of controlling the band cutting position control device based on the set rotation speed set in the step. According to a second aspect of the present invention to solve the above-mentioned problems, a method for controlling a band cutting position control device according to the first aspect is the method for controlling the band cutting position control device according to the first aspect, wherein the rotation speed detection process detects the control step. When the current rotation speed of the printing machine is larger than a value obtained by multiplying the set rotation speed read out by the rotation speed setting step by a constant ratio, the step of starting the control of the band cutting position control device is included. It is characterized by According to a third aspect of the present invention to solve the above-mentioned problems, a method for controlling a band cutting position control device according to the first aspect is the method for controlling the band cutting position control device according to the first aspect, wherein the rotational speed detection process detects the control step. When the present rotational speed of the printing machine is smaller than a value obtained by multiplying the set rotational speed read by the rotational speed setting step by a fixed ratio, the method includes the step of stopping the control of the band cutting position control device. It is characterized by

According to a fourth aspect of the present invention for solving the above-mentioned problems, a control method of a strip cutting position control device according to a fourth aspect of the present invention is a strip cutting position control device for controlling a cutting position of a printed strip, wherein And a control step of controlling the band cutting position control device based on the tension value detected in the tension detection step. According to a fifth aspect of the present invention, which solves the above-mentioned problems, a method for controlling a band cutting position control device is the method according to the fourth aspect, wherein the control step of controlling the band cutting position control device is detected by the tension detecting step. When the difference between the current tension value of the strip and the reference tension value is smaller than the allowable tension value, the method includes the step of starting the control of the strip cutting position control device. According to a sixth aspect of the present invention for solving the above-mentioned problems, a method for controlling a band cutting position control device according to the fourth aspect is such that, in the fourth aspect, the control process for controlling the band cutting position control device is detected by the tension detecting process. When the difference between the current tension value of the strip and the reference tension value is larger than the allowable tension value, the step of stopping the control of the strip cutting position control device is included.

According to a seventh aspect of the present invention which solves the above-mentioned problems, a control device for a strip cutting position control device is a strip cutting position control device for controlling a cutting position of a printed strip, in which a printer is rotated. A rotation speed detecting means for detecting the number of rotations, and a rotation speed setting means for setting the rotation speed at the time of final printing of the printing machine,
It is characterized by comprising control means for controlling the band cutting position control device based on the rotation speed detected by the rotation speed detection means and the set rotation speed set by the rotation speed setting means.

According to an eighth aspect of the present invention to solve the above-mentioned problems, a control device of a strip cutting position control device according to a eighth aspect of the present invention is a strip cutting position control device for controlling a cutting position of a printed strip. And a control means for controlling the band cutting position control device in response to a signal from the tension detection means.

According to a ninth aspect of the present invention, which solves the above-mentioned problems, the control device for the strip cutting position control apparatus according to the seventh or eighth aspect is to change the conveyance path length of the strip to cut the strip. In order to change the position, an adjusting roller movably supported, a detecting means for detecting a mark printed on the strip, and a control means for moving the position of the adjusting roller according to a signal from the detecting means It is characterized by having.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a printing machine, which value the rotation speed of the printing machine takes relative to the rotation speed at the time of final printing, or the tension of the printing machine, that is, the web. The cutting position control device is turned on / off depending on whether or not the tension applied is stable.

The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 shows a control device of a band cutting position control device according to the first embodiment of the present invention. As shown in FIG. 1, the cut-off control device 20
0, the control device 100 is mutually connected via I / Fs (interfaces) 101 and 201. The control device 100 includes a CPU 102, and the CPU 1
02, an input device 104, a display device 105, an output device 106 via an I / O (input output) 103.
Are connected.

In addition, the control device 100 includes a ROM 10
7, RAM 108, memory 109 for the number of revolutions of the printing press when the cut-off control device is ON / OFF, memory 120 for the number of revolutions set during the final printing of the printing press, and memory 121 for the current number of revolutions of the printing press. I have it. The rotation speed memory 109 turns on the cut-off control device.
The number of rotations of the printing machine used when the switch is turned off is recorded. Further, the CPU 102 has an I / O 110, an A / D
(Analog / digital converter) 118, F / V (frequency
/ Voltage converter) 111, and is connected to the rotary encoder 112 of the motor for driving the printing press.
It is connected to the control device 114 of the printing press via F113. The control device 114 of the printing press is connected to a set rotational speed setting device 122 for the final printing of the printing press.

On the other hand, the cut-off control device 2
00 has a CPU 202, a ROM 203, and a RAM 204, and is connected to a register mark detector 206 via an I / O 205. The register mark detector 206 detects a registration mark (register mark) printed in a margin of a printed pattern to obtain a position to be cut.

Further, the cut-off control device 2
00 is connected to a compensator-roller motor 209 via an I / O 207 and a compensator-roller motor driver 208, and is also connected to a rotary encoder 211 via a counter 210.
The compensator roller motor 209 moves the compensator roller 3 in FIG. 8 back and forth to change the transport path length, and the amount of change is detected by the rotary encoder 211 and totaled by the counter 210. The compensator / roller motor 209 operates according to the position determined by the register / mark detector 206.
The CPU 202 controls the position so that accurate cutting can be performed. The cut-off control device 200 is not limited to the one shown in FIG. 1, but a wide band cutting position control device for controlling the cutting position of the printed band can be widely used.

FIG. 2 shows an operation flow of the control device 100.
Shown in. FIG. 2 shows that the cut-off control device 200 is turned ON / O by comparing the number of rotations of the printing machine.
This is an operation flow for FF. First, when the start switch is turned on (step S1), and when the final printing start signal of the printing press is turned on (step S2), the set rotational speed of the printing press during final printing is read (step S).
3). The set rotational speed of the printing press during the final printing is preset by the operator by the setting rotational speed setting device 122 during the final printing of the printing press, and the set rotational speed memory 12 during the final printing is set.
Preloaded to 0.

Next, the cut-off control device 2
The number of revolutions of the printing machine when ON / OFF of 00 is calculated (step S4). For example, the number of rotations of the printing machine when the tension of the web is stable, specifically, 95% of the number of rotations of the printing machine at the time of final printing stored in the memory 120 for the number of rotations at the time of final printing is calculated. To do. The calculated rotation speed is stored in the rotation speed memory 109 of the printing press when the cut-off control device is turned on / off.

Subsequently, the current rotational speed of the printing press is read from the current rotational speed memory 121 (step S5),
It is determined whether or not the current rotation speed of the printing press is equal to or higher than the rotation speed of the printing press when the cut-off control device 200 is turned on / off (step S6). The current rotational speed of the printing press is the rotary encoder 1 of the printing press drive motor.
12 detected, F / V111, A / D118, I /
It is stored in the current rotation speed memory 121 via O110. When the current rotation speed of the printing press is equal to or higher than the rotation speed of the printing press when the cut-off control device 200 is turned on / off, the control of the cut-off control device 200 is started (step S7).

Further, the current rotation speed of the printing press is read into the current rotation speed memory 121 (step S8), and the current rotation speed of the printing press is cut off by the control unit 20.
It is determined whether or not it is smaller than the rotation speed of the printing machine when 0 is turned on / off (step S9). The current rotation speed of the printing press is ON / OFF of the cut-off control device 200.
When it is lower than the rotational speed of the printing press at that time, the control of the cut-off control device 200 is stopped (step S10). After that, if the start switch is turned off (step S11), the process ends. In the above embodiment, the control of the cut-off control device 200 is started when the current rotational speed of the printing press is equal to or higher than the rotational speed of the printing press when the cut-off control device 200 is turned ON / OFF. The control is stopped when it is small, but when the current rotation speed of the printing press is larger than the rotation speed of the printing press when the cut-off control device 200 is turned on / off, the cut-off control device 200 is turned off. It goes without saying that the control may be started and stopped at the following times.

FIG. 3 shows a control device of the band cutting position control device according to the second embodiment of the present invention. In this embodiment, in place of the memories 109, 120, 121 in the above-described embodiment, a reference tension value memory 115, a tension allowance value memory 116, and a web current tension value memory 117 are provided, and a printing press drive motor is provided. Web tension detector 2 in place of rotary encoder 112
12 is provided. Reference tension value memory 1
15. The tension allowable value memory 116 stores the tension value of the web used when the cut-off control device 200 is turned ON / OFF and the allowable value thereof. Further, in the present embodiment, the tension allowable value preliminarily written in the tension allowable value memory 116 from the tension allowable value input device 104a in the input device 104 is used.

An example of the operation flow of the control device 100 is shown in FIGS. 4 and 5. 4 and 5 compare the tension values of the web, that is, the tension values acting on the web, to determine the cut-off control device 200.
It is an operation flow of N / OFF. First, when the start switch is turned on (step T1), and when the final printing start signal of the printing press is turned on (step T1).
2) Read the web tension value (step T
3) The read web tension value is stored in the reference tension value memory 115 (step T4). The current tension value of the web is obtained by the tension detector 212 which is a means for measuring the tension acting on the web,
It is stored in the current tension value memory 117 via the A / D 118 and the I / O 110.

Next, after a certain time has passed (step T
5), read the tension value stored in the reference tension value memory 115 (step T6), read the tension allowable value from the tension allowable value memory 116 (step T7), and read the current tension value of the web (step T8). . The tension allowable value memory 116 is provided in advance with the tension allowable value input device 1 in the input device 114.
The allowable tension value is input from 14a. Subsequently, it is determined whether the difference between the tension value read from the reference tension value memory 115 and the current tension value of the web read from the current tension value memory 117 is less than or equal to the tension allowable value (step T9), and the tension is allowed. When it is less than the value, control of the cut-off control device 200 is started (step T10).

On the other hand, when it is larger than the allowable tension value, the current tension value of the web is written in the reference tension value memory 115 (step T11), and steps T5 to T9 are repeated. Then, after a lapse of a certain time (step T12), the tension value stored in the reference tension value memory 115 is read (step T13), and the tension allowable value is read from the tension allowable value memory 116 (step T14). The current tension value of the web is read from the value memory 117 (step T15).

Further, it is judged whether the difference between the tension value read from the reference tension value memory 115 and the current tension value of the web read from the current tension value memory 117 is larger than the allowable tension value (step). T16), if it is larger than the tension allowable value, the control of the cut-off control device 200 is stopped (step T17). On the other hand, when the tension is equal to or less than the allowable tension value, the current tension value of the web is written in the reference tension value memory 115 (step T1).
9), Steps T12 to T16 are repeated.
After that, if the start switch is turned off (step T18), the process ends. In the above embodiment, the cut-off control device is used when the difference between the tension value read from the reference tension memory 115 and the current tension value of the web read from the current tension value memory 117 is equal to or less than the allowable tension value. Although the control of 200 is started and the control is stopped when it is larger, the difference between the tension value read from the reference tension memory 115 and the current tension value of the web read from the current tension value memory 117 is the tension. Cut-off control device 200 when it is smaller than the allowable value
It goes without saying that the control may be started and the control may be stopped in the above cases.

FIG. 9 shows a control device for a strip cutting position control device according to the third embodiment of the present invention. In this embodiment, the reference tension value input device 104b in the input device 114,
This is an example of using the reference tension value and the tension allowance value previously written in the reference tension value memory 115 and the tension allowance memory 116 from the tension allowance input device 104a. Other configurations are similar to those of the embodiment shown in FIG. 3, and the description thereof will be omitted.

FIG. 6 shows an operation flow of the control device 100.
Shown in. First, when the start switch is turned on (step U1) and the final printing start signal of the printing press is turned on (step U2), the reference tension value is read from the reference tension value memory 115 (step U3). The allowable tension value is read from the allowable tension memory 116 (step U4), and the current tension value of the web is read from the current tension value memory 117 (step U5). The current tension value of the web is obtained from the tension detector 212 which is a means for measuring the tension acting on the web, and the A / D 118, I / O 1
It is stored in the current tension value memory 117 via 10.

Next, it is judged whether the difference between the tension value read from the reference tension value memory 115 and the current tension value of the web read from the current tension value memory 117 is less than or equal to the allowable tension value (step U).
6) If the tension is below the allowable value, control of the cut-off control device 200 is started (step U7). On the other hand, when it is larger than the allowable tension value, steps U5 to U6 are repeated. Subsequently, the current tension value of the web is read from the current tension value memory 117 (step U8).

Further, it is judged whether the difference between the tension value read from the reference tension value memory 115 and the current tension value of the web read from the current tension value memory 117 is larger than the allowable tension value (step). U9), if the tension is larger than the allowable value,
The control of the cut-off control device 200 is stopped (step U10). On the other hand, if the tension is less than the allowable value, steps U8 to U9 are repeated. After that, if the start switch is turned off (step U1
1) ends. In the above embodiment, the cut-off control is performed when the difference between the tension value read from the reference tension value memory 115 and the current web tension value read from the current tension value memory 117 is less than or equal to the allowable tension value. The control of the device 200 is started, and the control is stopped when it is large. However, the tension value read from the reference tension value memory 115 and the current tension value of the web read from the current tension value memory 117 are compared. Cut-off control device 200 when the difference is smaller than the allowable tension value
It goes without saying that the control may be started and the control may be stopped in the above cases.

[0032]

As described above in detail based on the embodiments, in the present invention, in the printing press, what value does the rotation speed of the printing press take with respect to the rotation speed at the time of final printing? Or, since the cutting position control device is turned on / off depending on whether the tension of the web, that is, the tension acting on the web is stable, the adjusting roller returns to a normal position in a short time, Since there is no need for cutting, there is an advantage that the waste of printing materials can be eliminated.

[Brief description of drawings]

FIG. 1 is a block diagram showing a control device of a band cutting position control device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of the band cutting position control device.

FIG. 3 is a block diagram showing a control device of a band cutting position control device according to a second embodiment of the present invention.

FIG. 4 is a flowchart showing an operation of the band cutting position control device.

FIG. 5 is a flowchart showing an operation of the band cutting position control device.

FIG. 6 is a flowchart showing the operation of the band cutting position control device.

FIG. 7 is a graph showing the operation of the compensator roller in the conventional case.

FIG. 8 is a perspective view, a side view, and a front view of a conventional folding machine.

FIG. 9 is a block diagram showing a control device of a strip cutting position control device according to a third embodiment of the present invention.

[Explanation of symbols]

1 Web 2 Guide Roller 3 Adjustment Roller (Compensator Roller 3) 4 Drag Roller 5 Former 6 Lead Roller 7 Nipping Roller 8 Cutting Cylinder 9 Folding Cylinder 10 Holding Cylinder 11 Conveyor 12 Picture 13 Cutting Reference Signal Generator 14 Detection Head 100 Control Unit 101, 113, 201 I / F 102, 202 CPU 103, 110, 205, 207 I / O 104 Input device 105 Display device 106 Output device 107, 203 ROM 108, 204 RAM 109 ON / OF of cut-off control device
F / V 112 Printing machine rotation speed memory at F F / V 112 Rotary encoder of printing press drive motor 114 Printing press control device 115 Reference tension value memory 116 Tension allowable value memory 117 Current web tension value Memory 118 A / D 120 Memory for setting rotational speed when printing on the printing machine 121 Memory for current number of printing machine 122 Setting rotation speed setting device when printing on the printing machine 200 Cut-off control device 206 Register Mark detector 208 compensator roller motor driver 209 compensator roller motor 210 counter 211 rotary encoder 212 web tension detector

Claims (9)

[Claims] 1. A strip cutting position control device for controlling a cutting position of a printed strip, and a rotation speed detecting step of detecting a rotation speed of a printing machine, and reading a set rotation speed of a printing machine during final printing. A rotation speed setting step, based on the rotation speed detected in the rotation speed detection step and the set rotation speed set in the rotation speed setting step, a control step of controlling the band cutting position control device, A method for controlling a band cutting position control device, comprising: 2. The control step of controlling the band cutting position control device, wherein the current rotation speed of the printing press detected by the rotation speed detection step is a set rotation speed read by the rotation speed setting step. 2. The control method for the band cutting position control device according to claim 1, further comprising the step of starting the control of the band cutting position control device when it is larger than a value obtained by multiplying by a certain ratio. 3. The control step of controlling the band cutting position control device, wherein the current rotation speed of the printing press detected by the rotation speed detection step is a set rotation speed read by the rotation speed setting step. 2. The control method for the band cutting position control device according to claim 1, further comprising the step of stopping the control of the band cutting position control device when the value is smaller than a value obtained by multiplying by a certain ratio. 4. A belt cutting position control device for controlling a cutting position of a printed belt, wherein a tension detecting step of detecting a current tension value of the belt and a tension value detected in the tension detecting step are used. Based on the above, a control step of controlling the band cutting position control device is performed, and a control method of the band cutting position control device. 5. The control step of controlling the strip cutting position control device, when the difference between the current tension value of the strip detected by the tension detecting step and the reference tension value is smaller than the allowable tension value, The method for controlling the band cutting position control device according to claim 4, further comprising the step of starting control of the band cutting position control device. 6. The control step of controlling the band cutting position control device, when the difference between the current tension value of the band detected by the tension detecting step and the reference tension value is larger than the allowable tension value, The control method of the strip cutting position control device according to claim 4, further comprising the step of stopping the control of the strip cutting position control device. 7. A strip cutting position control device for controlling a cutting position of a printed strip, wherein a rotation speed detecting means for detecting a rotation speed of a printing machine and a rotation speed of a printing machine during final printing are set. A rotation speed setting means and a control means for controlling the band cutting position control device based on the rotation speed detected by the rotation speed detecting means and the set rotation speed set by the rotation speed setting means. A control device for a band cutting position control device characterized by the above. 8. A strip cutting position control device for controlling a cutting position of a printed strip, in accordance with a tension detecting means for detecting a current tension value of the strip and a signal from the tension detecting means. A control device for a strip cutting position control device, comprising control means for controlling the strip cutting position control device. 9. An adjusting roller movably supported for changing a conveyance path length of the belt-like member and a cutting position of the belt-like member, a detection unit for detecting a mark printed on the belt-like member, and 9. The control device for a strip cutting position control device according to claim 7, further comprising control means for moving the position of the adjusting roller according to a signal from the detection means.