JPH0564882A - Web processing machine - Google Patents

Abstract

PURPOSE:To easily set the initial phase of each device of a web processing machine containing printing devices and a processing device, reduce an amount of paper waste at the time of carrying paper, and eliminate the need for a compensator by a method wherein each device is independently actuated, and the phase of a drive motor is synchronously controlled for every device. CONSTITUTION:Printing devices 1-4 and a folding device 5 of, e.g. a rotary press are driven by motors 8 provided for every device. In the vicinity of each rotating part 18, an origin sensor 20 is provided. The number phiB of pulses phiB corresponding to the distance between the sensor 20 and an origin mark 19 on the rotating part 18 is inputted to each origin data setting device 23 of a controller 15. By operating an initial phase setting switch 22, the motor 8 starts driving and stops at the inputted initial phase. By inputting a reference speed to a common speed setting device 25, a reference pulse phiA is inputted to a control circuit 24. In addition, the phase pulses phiC of the motor 8 generated by a pulse generator 17 is counted. The rotating speed of the motor 8 is controlled in accordance with a value phiC, phiA+phiB-phiC.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a web processing machine, such as a rotary printing machine, which prints on a web-like sheet and performs required processing after printing. The present invention relates to a so-called shaftless type web processing machine in which a drive motor of each unit is controlled in tuned phase.

[0002]

2. Description of the Related Art In a conventional rotary printing press as a typical example of a web processing machine, a printing unit and a folding unit are mechanically connected by a common drive shaft (main shaft).

Therefore, each unit is driven while maintaining its phase after the initial phase adjustment,
It was not necessary to control the phase and speed of each unit during driving.

[0004]

However, according to the conventional structure as described above, a long drive shaft provided with a clutch for each unit is required, and the installation pitch of each unit is limited, so that the assembly is difficult. There are problems such as difficulty. In addition, when the drive shafts are mechanically connected, accurate phase alignment is required, and when the plate is hooked or the paper is threaded, the units are interlocked with each other, so that the amount of waste paper increases. Further, there is a problem that a compensator having a complicated control function is required to compensate for the variation in the paper threading distance.

Therefore, it is a technical object of the present invention to solve the above problems by mechanically making each unit independent and controlling the drive motor of each unit in synchronization phase.

[0006]

In order to solve the above-mentioned problems, the present invention provides a web processing machine including a printing unit and other required units, each of these units being provided with an independent drive shaft. Having a motor connected to the drive shaft, initial phase setting means of the rotating part of each unit, and tuning for feedback controlling the speed and phase of the motor of each unit based on a reference signal common to each unit It is configured to have a phase control means.

Further, the tuning phase control means may be provided with a digital calculation means to perform the feedback control by sample value control.

[0008]

Operation: Each unit is set to a predetermined initial phase by the initial phase setting means, and thereafter, by the tuning phase control means.
The speed is controlled to tune to the reference signal while maintaining the predetermined phase relationship.

Further, in the case where the above-mentioned control is performed by the sample value control, the speed control is performed by the arithmetic processing by the digital computer.

At this time, in the case where each unit is provided with the register correction circuit, the error of the vertical direction register generated during the operation of the web processing machine is corrected by accelerating / decelerating the motor rotation speed for each unit.

[0011]

Embodiment 1 FIG. 1 schematically shows a rotary printing machine having three black printing units 1, 2, 3 and one color printing unit 4 and a folding unit 5. Each of these units is mounted on a frame 6, and the frame 6 is supported by legs 7. A motor 8 is installed for each unit on the frame 6, and a drive shaft 9 for each unit is attached to the motor 8.
Are connected. A vertical axis 12 for each unit is coupled to each drive shaft 9 via a bevel gear 11. Each unit is driven by a motor 8, a drive shaft 9 and a vertical axis 12 for each unit.

The leg portion 7 of the frame 6 is provided with a paper feeding portion 13
Is provided, and the paper web 14 pulled out from these paper feeding portions 13 is drawn into the folding unit 5 via the printing units 1, 2, 3, and 4. A DC servo motor is used for each of the motors 8 described above, and each motor 8 is controlled by a common controller 15.

As shown in FIG. 2, the motor 8 is provided with a tacho generator 16 and a pulse generator 17. Further, an origin mark 19 is attached to an appropriate position on the rotating portion 18 of each unit, and an origin sensor 20 is installed near the rotating portion 18.

FIG. 2 shows an example of the controller 15 connected to the motor 8, the tachogenerator 16, the pulse generator 17 and the origin sensor 20.

The control device 15 includes an initial phase setting circuit 21 and an initial phase setting switch 2 corresponding to each unit.
2. It has an origin data setting device 23 and a control circuit 24.
It also has a speed setter 25 and a reference pulse generator 26 common to all units.

FIG. 3 shows a specific example of the initial phase setting circuit 21 and the control circuit 24 provided corresponding to each unit. The initial phase setting circuit 21 includes a phase pulse counter 27, an initial setting pulse generator 28 and a comparator 29. The control circuit 24 includes an F / V converter 30, a reference pulse counter 31, a pulse calculation circuit 32, a D / A converter 33, and an analog regulator 34.

The phase pulse counter 27 of the initial phase setting circuit 21 has the origin sensor 20 and the pulse generator 17 connected to its input side, and the comparator 29 and the pulse calculation circuit 32 of the control circuit 24 connected to its output side. To be done. The phase pulse counter 27 is reset when the origin sensor 20 detects the origin mark 19 described above, and the phase of the motor 8 generated by the pulse generator 17, that is, the phase of the rotating portion 18 of each unit driven by the motor 8 is set. Count the indicated pulses.

The initial phase setting switch 22 is manually operated to set the initial phase of the rotating portion 18 for each unit. The switch 22 and the comparator 29 are connected to the input side of the initial setting pulse generator 28, and the F / V converter 30 of the control circuit 24 is connected to the output side. The initialization pulse generator 28 is activated by the switch 22 to generate an initialization drive pulse for the motor 8 and output it to the F / V converter 30.

The input side of the comparator 29 is connected to the phase pulse counter 27 and the origin data setting device 23, and the output side is connected to the initial setting pulse generator 28. Comparator 29
Compares the number of output pulses φ _C of the phase pulse counter 27 with the number of stored pulses φ _B of the origin data setting unit 23, and outputs a signal for stopping the operation of the initial setting pulse generator 28 when they match.

When the origin data of each rotating unit 18 is input, the origin data setter 23 converts the origin data into a pulse number φ _B equal to the initial phase and stores it.

The F / V converter 30 of the control circuit 24 has an input side connected to a reference pulse generator 26 for generating a pulse train corresponding to a set speed and phase, and an output side connected to an analog regulator 34. This F / V converter 30 is
Convert a reference pulse with a constant frequency to a constant reference voltage,
Output to the analog regulator 34.

The reference pulse counter 31 has a reference pulse generator 26 connected to its input side and a pulse calculation circuit 32 connected to its output side, counts reference pulses, and calculates the number of pulses φ _A of the pulse calculation circuit. To 32.

The pulse operation circuit 32 has the input side connected to the phase pulse counter 27, the origin data setting device 23 and the reference pulse counter 31, and the output side connected to the D / A converter 33. The pulse calculation circuit 32 calculates the sum of the reference pulse number φ _A and the stored pulse number φ _B of the origin data setting device 23 (φ _A + φ _B ) and the phase pulse counter 27.
Difference from pulse φ _C output from (φ _A + φ _{B −} φ _C )
Is calculated and the calculation result is output to the D / A converter 33. The D / A converter 33 converts the output into a DC voltage,
Output to the analog regulator 34.

The analog regulator 34 is connected to the F / V converter 30, the D / A converter 33, the tachogenerator 16 and the register correction circuit 35 on the input side, and is connected to the motor 8 on the output side. The analog regulator 34 uses the output voltage of the F / V converter 30 as a reference input,
The output of the D / A converter 33 and the output of the tachogenerator 16 are used as feedback inputs to feedback control the power supply device (not shown) of the motor 8.

The tachogenerator 16 supplies a voltage equal to the reference voltage when the motor 8 is rotating at a predetermined reference speed corresponding to the above reference voltage, and when the motor 8 is deviated from the reference speed, the deviated speed. A voltage proportional to is fed back to the analog regulator 34, and acts so as to always keep the rotation speed of the motor 8 at the reference speed.

The register correction circuit 35 outputs a speed adjusting voltage (+ or − constant voltage) to the analog regulator 34 each time a register operating switch (not shown) is operated, for example. The analog regulator 34 adds the voltage to a reference voltage for speed setting output from the F / V converter 34, and controls the rotation of the motor 8 at a reference speed according to the added reference voltage.

The control device 15 has the above-mentioned configuration,
Next, the operation will be described.

First, in order to perform the initial phase adjustment, the origin data (origin sensor 20) of the rotary unit 18 for each unit is used.
The number of pulses φ _B corresponding to the distance from the origin mark 19 to the origin mark 19 is input to the origin data setting unit 23, and the initial phase setting switch 22 operates the initial setting pulse generator 28. Then, the output pulse is converted into a DC voltage by the F / V converter 30, and the motor 8 is rotated. With this rotation, the phase pulse φ _PG generated from the pulse generator 17 is input to the phase pulse counter 27. The counter 27 is reset when the origin mark 19 of each rotating portion 18 is detected by the origin sensor 20, and starts counting the phase pulse φ _PG .

The output pulse of the counter 27 is input to the comparator 29, and its pulse number φ _C is compared with the stored content of the origin data setting unit 23, that is, the pulse number φ _{B of the} origin data. When the two pulse numbers (φ _C and φ _B ) match each other, the comparator supplies a signal for stopping the operation of the initialization pulse generator 28. As a result, each rotating unit 18 driven by the motor 8 stops at the initial phase set and stored in each origin data setting unit 23.

After the initial phase of the rotating portion is set for each unit in this way, the desired reference speed is input to the speed setter 25. When this is input, the reference pulse generator 26 outputs a reference pulse φ _A having a constant frequency proportional to the reference speed.

This reference pulse φ _A is input to the F / V converter 30, where it is converted into a reference voltage, and this reference voltage causes the motor 8 to rotate at a reference speed via the analog regulator 34. When the rotation speed of the motor 8 deviates from the reference speed, the deviation is corrected by the difference between the output of the tachogenerator 16 and the reference voltage, so that the motor 8 is synchronously controlled so as to always maintain the reference speed.

On the other hand, the phase pulse φ _PG from the pulse generator 17 representing the phase of each rotating portion 18 is counted by the phase pulse counter 27, and in the pulse calculation circuit 32.
The sum of the number of pulses φ _B and the number of reference pulses φ _A stored in the origin data setter 23 (that is, the initial phase of each rotating unit 18 + the reference phase change amount according to the reference pulse) and the phase pulse counter 27. The difference (φ _A + φ _B −φ _C ) from the output pulse number φ _C (initial phase + actual phase change amount) is calculated. A voltage for feedback compensation corresponding to this difference is fed back to the analog regulator 34 by the D / A converter 33, and the motor 8 is accelerated / decelerated by that amount. As a result, the rotation unit 18 of each unit is phase-controlled so that the phase change after the initial phase setting always matches the reference phase change amount by the reference pulse. Therefore, the phase difference between the rotating parts 18 of each unit is always kept equal to the phase difference set in the initial phase matching during operation.

If a vertical register error occurs on the web 14 during printing, the register correction circuit 35 is activated to accelerate or decelerate the rotation speed of the motor 8 of each unit.
Correct the register. As described above, this device does not require the register correction mechanism as found in the conventionally known web processing machine because the speed of the motor 8 of each unit can be adjusted individually and the register correction during operation can be performed. Therefore, the cost can be reduced. Further, since there is no failure due to the register correction mechanism, the failure occurrence rate of the entire processing machine is reduced.

For the reference pulse generator 26, an oscillator having a high frequency stability, such as a crystal oscillator, may be used in order to improve the rotation accuracy of each unit and the tuning accuracy between the units.

[0035]

[Embodiment 2] The controller 15 of this embodiment shown in FIG.
An analog regulator (servo amplifier) 34 provided for each unit, a phase pulse counter 27, a reference pulse counter 31, an F / V converter 30, and a D / A converter 3
3 and one CPU control circuit 54 connected to them, the motor of each unit of the web processing machine is controlled by sample value (time division) by the CPU 54 control circuit, and initial phase setting and tuning phase control of each unit are performed. Is to do. It should be noted that the connection between each unit and the CPU control circuit 54 is the same in this figure, so a block diagram of one unit is shown. Further, in the present embodiment, the same reference numerals are given to the portions described in the first embodiment, and detailed description thereof will be omitted.

The CPU control circuit 54 comprises a CPU 50, data selectors 51a and 51b, an address decoder 52 and an I / O interface 53. CPU50
As shown in the figure, the reference pulse counter 3 of each unit
1 and the phase counter 27 are connected via a data selector 51, and the select outputs generated from the address bus AB of the CPU 50 by the address decoder 52 are connected to the reset inputs of both the counters 27 and 31. Further, an I / O interface 53 is connected to the CPU 50, and an origin data setting switch 23, an initial phase setting switch 22 for CPU operation, and a register correction switch for each unit are connected to an input port of the I / O interface 53. The circuit 35 is connected, and the origin sensor 20 of each unit is connected. Further, the data bus DB of the CPU 50 is connected to the data latch 5
5 is connected to the D / A converter 33 of each unit, and the select output by the address decoder 52 and the control bus CB of the CPU 50 are connected to the D / A converter.

This embodiment is constructed as described above, and its operation will be described below.

First, in order to perform the initial phase adjustment, the origin data φ _B of the rotary unit 18 for each unit is set in the origin data setting switch 23, and the initial phase setting switch 22 is set.
To operate the CPU 50. Then, CPU5
0 outputs appropriate output data to the D / A converter 33 of each unit, rotates the motor 8 of each unit, and
The input ports of the I / O interface 53 to which the origin sensor 20 of each unit is connected are sequentially read while performing, for example, polling processing, and the detection signal from the origin sensor 20 of each unit is read. The CPU 50 that has detected the origin mark 19 in this manner resets the phase pulse counter 27 of the unit that has detected the origin mark 19, and causes the phase pulse counter 27 to detect the phase pulse φ _PG.
Of the phase pulse counter 27 of each unit are sequentially sampled, and the sampling value φ _C is compared with the origin data φ _B set in the unit. ,
When they match, the data output to the D / A converter 33 of the unit is stopped and the motor 8 is stopped. as a result,
The rotating portion 18 of each unit driven by the motor 8 stops at the set initial phase.

When the initial phase setting for each unit is completed in this way, the reference speed is input to the speed setter 25. When this is input, the reference pulse generator 26
A reference pulse having a constant frequency proportional to the reference speed is output. This reference pulse is converted into a reference voltage by the F / V converter 30, and the analog regulator 34 rotates the motor 8 at the set speed by this reference voltage. At this time, if the rotation speed of the motor 8 deviates from the set speed, the analog regulator 34 corrects the rotation of the motor 8 so as to eliminate the difference between the output of the tacho generator 16 and the reference voltage, so that the motor 8 is always set at a constant value. Drive at speed.

On the other hand, the reference pulses input from the reference pulse generator 26 to the reference pulse counter 31 of each unit are integrated by the counter 31, and the rotation phase of the motor of each unit with respect to the elapsed time, that is, the phase of each unit. Data φ _A is generated. The data φ _A is the CPU
50 is sequentially sampled together with the integrated data φ _C of the phase pulse counter 27 of each unit by the operation of the data selectors 51a and 51b. The sampling data φ _A and φ _B are the origin data set for each unit. φ _B is added and subtracted.

That is, the difference (φ _A + φ _B −φ _C ) between the reference phase change amount corresponding to the initial phase ten reference pulse and the actual phase change amount of each initial phase ten, for each unit, is calculated for each unit. The calculated voltage data for feedback compensation is sequentially output to the D / A converter 33 of each unit. With this feedback voltage, the analog regulator 34 of each unit increases or decreases the rotation speed of the motor 8. As a result, the rotating unit 18 of each unit is accurately tuned so that the phase change after the initial phase setting always matches the reference phase change amount due to the reference pulse, and their speed and phase are Kept accurate. At that time, each unit is controlled in tuning phase without interfering with each other.

If an error occurs in the register of each web 14 during operation, the switch circuit 3 for register correction is used.
5 is activated, C is activated during the operation period of the switch circuit 35.
The PU 50 changes the output data to the D / A conversion circuit 33 of each unit corresponding to the switch circuit 35, for example, and slightly increases or decreases the rotation speed of the motor 8. Therefore, each unit can perform register correction during operation. When the registers of each unit are matched and the operation of the switch circuit 35 is stopped, the CPU 50 determines the state of the switch circuit 35, outputs normal speed control data to the D / A converter 33, and each unit The tuning phase control is continued.

As described above, in this embodiment, instead of the initial setting pulse generator 28 and the comparator 29 of the initial phase setting circuit 21 and the pulse arithmetic circuit 32 of the control circuit 24 shown in FIG. The CPU 50 uses software.

The sampling period for each unit of the CPU 50 is selected to be higher than twice the frequency of the change in deviation of each unit. Further, the interval of the sampling cycle may be generated by a timer by software processing of the CPU 50, or the CPU 50 may be provided with an interval timer clock.
Further, the present invention can be applied to various processing machines that perform printing on a web-shaped sheet other than newspaper and perform required processing after printing.

Further, each unit of the first and second embodiments may be provided with a register error detecting means so that the detecting operation and the register correcting circuit can automatically perform the correcting operation.

[0046]

As described above, in the web processing machine of the present invention, the drive shaft and the drive motor of the printing unit and other required units are mechanically independent, and the rotating portion of each unit serves as the initial phase setting means. The operation is performed while maintaining the phase difference initialized by the tuning phase control means.

That is, this web processing machine exhibits the following effects. (1) The weight of the device is reduced by simplifying the drive mechanism. (2) It is possible to prevent the shift of the cutting synchronization at the folding machine due to the difference in the path length between each press and the folding machine by setting the initial phase of the printing position of the press in advance. (3) Since the initial phase can be set for each unit, disconnection synchronization at the folding machine can be performed without the need for a convensor. (4) When the units are accelerated or decelerated, it is possible to prevent the tension fluctuation due to the disturbance to the web caused by the inertia of the paper roller or the like by the phase adjustment. (5) It is possible to prevent the cutting synchronization shift caused by the change of the disturbance amount to the web due to the printing speed on the drag roll of the folding machine, the paper roll of the rail frame, etc. by the phase adjustment. (6) When running out of paper during operation, it does not have a common drive shaft (shaft) for each unit as in the past, so it is possible to stop the printing machine, folding machine, etc. suddenly (within 3 seconds) ( It can prevent the equipment from being damaged). (7) Since there is no common drive shaft (shaft) for each unit, the installation pitch can be freely selected. (8) In a newspaper rotary press, it is easy to deal with paper stretching that changes depending on the quality of the paper roll by changing the amount of phase adjustment during acceleration / deceleration of each unit. (9) It is possible to perform paper threading and plate hanging for each unit. (10) Even if the paper threading course is changed, it is only necessary to change the initial phase for each unit, which can be easily dealt with. (11) Since other printing machines and folding machines do not rotate during threading or plate changing, waste paper is reduced, and initial cost and running cost can be suppressed. (12) Automatic connection between each unit is easy.

In addition to the above effects, the use of sample value control for the feedback control can effectively use the computer and reduce the size of the apparatus.

Further, the register correction circuit provided for each unit can correct the register during operation.
Further, since the register correction mechanism is not required, the manufacturing cost can be reduced and the number of failures is small.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an example.

FIG. 2 is a block diagram of the control device of FIG.

3 is a block diagram of the control circuit of FIG.

FIG. 4 is a block diagram of a control device according to another embodiment.

[Explanation of symbols]

 1, 2, 3, 4 Printing unit 5 Folding unit 6 Frame 7 Leg 8 Motor 9 Drive shaft 11 Bevel gear 12 Vertical axis 13 Paper feed unit 14 Paper web 15 Control device 16 Tacho generator 17 Pulse generator 18 Rotating unit 19 Origin Mark 20 origin sensor 21 initial phase setting circuit 22 initial phase setting switch 23 origin data setting device 24 control circuit 25 speed setting device 26 reference pulse generator 27 phase pulse counter 28 initial setting pulse generator 29 comparator 30 F / V converter 31 Reference pulse counter 32 Pulse calculation circuit 33 D / A converter 34 Analog regulator 35 Register correction circuit 54 CPU control circuit

Claims (3)

[Claims] 1. In a web processing machine including a printing unit and other required units, each of these units has an independent drive shaft and a motor connected to the drive shaft, and each unit has its own drive shaft. A web processing machine comprising: an initial phase setting means of the rotating part; and a tuning phase control means for feedback controlling the speed and phase of the motor for each unit based on a reference signal common to each unit. 2. The web processing machine according to claim 1,
A web processing machine characterized in that the tuning phase control means is provided with a digital calculation means for performing the feedback control by sample value control. 3. The web processing machine according to claim 1, further comprising a register correction circuit that finely adjusts a rotation speed of a motor of each unit for each of the units.