JP3068682B2 - Web processing machine - Google Patents

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 that prints on a web-like sheet like a rotary printing press and performs required processing after printing. In particular, each unit is mechanically independent. The present invention relates to a so-called shaftless type web processing machine in which a drive motor of each unit is controlled in synchronization phase.

[0002]

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

For this reason, after performing the initial phase adjustment, each unit is driven while maintaining its phase.
There was no need to perform control to match the phase and speed of each unit during driving.

[0004]

However, the web processing machine having the conventional structure as described above has a long drive shaft provided with a clutch for each unit. If the correct phase adjustment is not performed, the compensator with a complicated control function not only increases the amount of waste paper because the units are linked during plate hanging or threading, but also compensates for variations in the threading distance. There was a problem that required.

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

[0006]

According to the present invention, each unit of a web processing machine including a printing unit and other necessary units includes an independent drive shaft for each unit and a drive shaft for the unit. A motor connected to a shaft, a pulse generator for detecting a rotation phase of a rotating unit of a unit driven by a drive shaft connected to the motor,
A control circuit for performing feedback control of the speed and phase of the rotating unit based on the detection pulse of the pulse generator and a common reference signal input to each unit, and for setting an initial phase of the rotating unit in the control circuit. In a web processing machine provided with an initial phase setting circuit that outputs a drive signal based on a detection signal from an origin sensor provided in the rotating unit, a signal for speed adjustment is output to each of the units each time an operation switch is operated. That is, a configuration in which a register correction circuit for inputting to the control circuit is provided is employed.

[0007]

[0008]

In the web processing machine configured as described above, at the start of operation, each unit sets an initial phase setting circuit to a predetermined initial phase based on a detection signal from the origin sensor. When the operation of each unit is started in this state, the motor connected to the drive shaft of each unit is controlled by the control circuit, and the speed and phase of the rotating unit of the unit are controlled. At this time, the control circuit of each unit performs feedback control based on a common reference signal input to each unit and a detection pulse of a pulse generator that detects a rotation phase of a rotating unit provided in each unit. . Therefore, at the time of starting operation, each unit can continue to operate while maintaining the set predetermined phase relationship. At this time, for example, when an operation switch is operated to input a signal for speed adjustment from the register correction circuit to the control circuit,
The input signal for speed adjustment is added or subtracted from the common reference signal input to each unit and the detection pulse of the pulse generator that detects the rotation phase of the rotating unit provided in each unit, thereby accelerating the motor rotation speed. Or you can slow down. Therefore, the error of the register in the vertical direction can be corrected by appropriately changing the phase of the rotating unit. At this time, since the web is a roll paper and continuous, the register correction can be performed by operating the operation switch for each unit and correcting the rotational phase by the register correction circuit.

[0009]

[0010]

[0011]

Embodiment 1 FIG. 1 schematically shows a rotary printing press having three black printing units 1, 2, 3 and one color printing unit 4 and folding unit 5. Each of these units is mounted on a frame 6, which is supported by legs 7. On the frame 6, a motor 8 is installed for each unit, and the motor 8 has a drive shaft 9 for each unit.
Are linked. A longitudinal axis 12 for each unit is connected 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 7 of the frame 6 has a paper feeder 13
Is provided, and the paper web 14 pulled out from the paper feed unit 13 is drawn into the folding unit 5 via the printing units 1, 2, 3, and 4. Each of the motors 8 is a DC servo motor and is controlled by a common control device 15.

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

FIG. 2 shows an example of the control device 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 setter 23 and a control circuit 24.
All units have a common speed setting device 25 and
That it is connected to the reference pulse generator 26.

FIG. 3 shows a specific example of the initial phase setting circuit 21 and control circuit 24 provided for 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 operation circuit 32, a D / A converter 33, and an analog regulator.

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

The initial phase setting switch 22 is manually operated to set the initial phase of the rotating section 18 for each unit. The switch 22 and the comparator 29 are connected to the input side of the initialization 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 outputs this 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 unit 23, and the output side is connected to the initialization 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.

[0020] Incidentally, the origin data setter 23 and stores it when the origin data is input in terms of the equivalent number of pulses phi _B in the initial phase of the rotating unit 18.

The input side of the F / V converter 30 of the control circuit 24 is connected to the reference pulse generator 26 for generating a pulse train corresponding to the set speed and phase, and the output side is connected to the analog regulator 34. This F / V converter 30
Convert a reference pulse with a certain frequency to a certain 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 counts the number of pulses φ _A into the pulse calculation circuit. 32.

The pulse operation circuit 32 has the input side connected to the phase pulse counter 27, the origin data setter 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 (φ _A + φ _B ) of the reference pulse number φ _A and the stored pulse number φ _B of the origin data setting unit 23 and the phase pulse counter 27.
The difference between the pulse phi _C output from the _{(φ A + φ B -φ C} )
And outputs the calculation result to the D / A converter 33. The D / A converter 33 converts the output to a DC voltage,
Output to the analog regulator 34.

The analog regulator 34 has the input side connected to the F / V converter 30, the D / A converter 33, the tachometer generator 16, and the register correction circuit 35, and the output side connected to the motor 8. 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 tacho generator 16 are used as feedback inputs to perform feedback control of a power supply (not shown) of the motor 8.

The tacho generator 16 outputs a voltage equal to the reference voltage when the motor 8 is rotating at a predetermined reference speed corresponding to the above-mentioned reference voltage. Is input to the analog regulator 34 in a feedback manner, and acts so as to always keep the rotation speed of the motor 8 at the reference speed.

The register correction circuit 35, for example, each time actuate the register operation switch (not shown), and outputs a voltage for speed adjustment to the analog regulator 34. The analog regulator 34 converts the voltage into the F / V converter 30
Add to or subtract from the speed setting reference voltage output from
The rotation of the motor 8 is controlled at a reference speed according to the added or subtracted reference voltage.

The control device 15 is configured as described above.
Next, the operation will be described.

First, in order to perform the initial phase adjustment, the origin data (the origin sensor 20) of the rotating unit 18 for each unit is required.
The number of pulses phi _B) corresponding to the distance to the origin mark 19 is input to the origin data setter 23, and by initial phase setting switch 22, actuates an initialization 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. A phase pulse φ _PG generated by the pulse generator 17 with this rotation is input to the phase pulse counter 27. Counter 27 is reset to start counting of the phase pulse phi _PG when the origin mark 19 of the rotating portion 18 is detected by the origin sensor 20.

The output pulse of the counter 27 is input to the comparator 29, and the 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 numbers of pulses (φ _C and φ _B ) match, a signal for stopping the operation of the initialization pulse generator 28 is supplied from the comparator. As a result, each rotating unit 18 driven by the motor 8 stops with the initial phase set and stored in each origin data setting unit 23.

After the initial phase of the rotating unit is set for each unit in this way, a desired reference speed is input to the speed setting unit 25. If you enter it, the reference pulse phi _A of constant frequency which is proportional to the reference speed from the reference pulse generator 26 is outputted.

The reference pulse φ _A is input to the F / V converter 30, where it is converted to a reference voltage, and the 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 tacho generator 16 and the reference voltage, so that the motor 8 is tuned 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 section 18 is counted by the phase pulse counter 27 and
The sum of the origin data pulse number stored in the setting unit 23 phi _B and the reference pulse number phi _A (i.e., the reference of the phase change amount corresponding to the initial phase + reference pulse each revolution 18), the phase pulse counter 27 the number of output pulses phi _C difference between the (initial phase + actual phase change _{amount) (φ a + φ B -φ} C) is calculated. A voltage for feedback compensation corresponding to the difference is fed back to the analog regulator 34 by the D / A converter 33, and the motor 8 is accelerated and 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 due to the reference pulse. For this reason, the operation is performed while maintaining the phase difference between the rotating parts 18 of the respective units always equal to the phase difference set in the initial phase adjustment during operation.

During printing or folding, each web 14
If a vertical register error occurs between the webs 14 due to a difference in tension or the like , for example, a misalignment of printing or folding occurs, the register correction circuit 35 is operated to accelerate or decelerate the rotation speed of the motor 8 of each unit. , Register or web
The vertical position is corrected. As described above, since the speed of the motor 8 of each unit can be individually adjusted and register correction during operation can be performed, a complicated register correction mechanism as in a conventional well-known web processing machine is not required. Therefore, cost can be reduced. Further, since no failure occurs due to the register correction mechanism, the failure occurrence rate of the entire processing machine also decreases.

The reference pulse generator 26 is preferably an oscillator having a high frequency stability, such as a crystal oscillator, in order to improve the rotational accuracy of each unit and increase the tuning accuracy between the units.

[0035]

Embodiment 2 A control device 15 of this embodiment shown in FIG.
Analog regulator (servo amplifier) 34, phase pulse counter 27, reference pulse counter 31, F / V converter 30, and D / A converter 3 provided for each unit
3 and one CPU control circuit 54 connected to them. The CPU 54 control circuit controls the motor of each unit of the web processing machine by sample value (time division), sets the initial phase of each unit and tunes phase control. Is performed. Since the connections between each unit and the CPU control circuit 54 are the same, a block diagram of one unit is shown in FIG. In the present embodiment, the same reference numerals are given to the parts described in the first embodiment, and the detailed description is omitted.

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

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

First, in order to perform the initial phase adjustment, the origin data φ _B of the rotating 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,
Each input port of the I / O interface 53 to which the origin sensor 20 of each unit is connected is 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 stores the phase pulse φ _PG in the phase pulse counter 27.
Simultaneously with the start of counting, it operates the data selector 51b, sequentially sampling the count data of the phase pulse counter 27 for each unit, and compares with its sampling value phi _C and the origin data phi _B set in the unit ,
When both 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 unit 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 setting device 25. When this is input, from 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 the 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, and always sets the motor 8 at a constant setting. Drive at speed.

On the other hand, the reference pulses inputted 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, each unit the phase data phi _A is generated. The data φ _A is a CPU
50, the data selectors 51a and 51b sequentially sample data together with the integrated data φ _C of the phase pulse counter 27 of each unit, and the two sampled data φ _A and φ _C are the origin data set for each of the units. is φ _B and the addition and subtraction.

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 initial phase ten actual phase change amount of each rotating unit is determined for each unit. Then, voltage data for feedback compensation corresponding to the deviation is sequentially output to the D / A converter 33 of each unit. With the feedback voltage, the analog regulator 34 of each unit increases or decreases the rotation speed of the motor 8. As a result, the rotator 18 of each unit tunes precisely 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 independent of disturbance or load. Is kept accurate. At that time, the units are tuned and phase-controlled without interfering with each other.

If an error occurs in the register of each web 14 during operation, a switch circuit 3 for register correction is used.
5 during operation of the switch circuit 35, C
The PU 50 changes, for example, output data to the D / A conversion circuit 33 of each unit corresponding to the switch circuit 35, 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 match and the operation of the switch circuit 35 is stopped, the CPU 50 determines the state of the switch circuit 35 and outputs normal speed control data to the D / A converter 33. Subsequently, tuning phase control is performed.

As described above, in this embodiment, instead of the initialization 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 performs the operation by software.

The sampling cycle of each unit of the CPU 50 is selected to be higher than twice the frequency of the change of the deviation of each unit. 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.
In addition, the present invention can be applied to various types of processing machines that perform printing on web-like sheets other than newspapers and perform required processing after printing.

Furthermore, a register error detecting means may be provided in each unit of the first and second embodiments, and the correcting operation may be automatically performed by the detecting means and the register correcting circuit.

[0046]

The present invention is configured as described above,
An independent drive shaft and motor are provided for each knit, and the motor
Of the unit driven by the drive shaft connected to the motor
The rotation speed and phase of the section are
Feedback based on a common reference signal input to the unit.
Each unit of the web processing machine that is controlled by
A register correction circuit that inputs a signal for speed adjustment to the control circuit
By providing the road, the motor speed of each unit
Since it can be adjusted separately and the register can be corrected during operation,
Register correction mechanisms, such as those found in
No need. Therefore, cost can be reduced. Also,
Since there is no failure caused by the register mechanism, the processing machine
The overall failure rate can also be reduced .

[0047]

[0048]

[0049]

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an embodiment.

FIG. 2 is a block diagram of the control device of FIG. 1;

FIG. 3 is a block diagram of a control circuit of FIG. 2;

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 Tach 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 operation circuit 33 D / A converter 34 Analog regulator 35 Register correction circuit 54 CPU control circuit

Claims (1)

(57) [Claims] 1. Each unit (1-5) of a web processing machine including a printing unit (1,2,3) and other required units (4,5) is independent for each unit (1-5) . drive shaft (9), a motor (8) which is connected to the drive shaft (9), connected to the drive shaft and the motor (8)
A pulse generator (17) for detecting a rotation phase of a rotating section (18) of a unit driven by (9), a detection pulse (φ _PG ) of the pulse generator (17 ) and each unit (1 ) ;
Rotating unit based on the common reference signal (phi _A) inputted to 5) and (18) speed control circuit for feedback controlling the phase of (24), the rotary portion to the control circuit (24) (18 A) a web processing machine provided with an initial phase setting circuit (21) for outputting a drive signal for setting an initial phase based on a detection signal from an origin sensor (20) provided in the rotating section (18) . Activate the operation switch on each of the above units (1-5)
A web processing machine, comprising: a register correction circuit (35) for inputting a speed adjustment signal to a control circuit (24) every time .