JP2000168052A - Operating state monitoring device for rotary press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To monitor an operating state of a rotary press capable of easily grasping the history of a driving state of a servo motor for driving a plate cylinder of each printing unit by an operator. SOLUTION: This operating state monitoring device for a rotary press comprises a motor driving state quantity detecting means 22, 23 for detecting a motor driving state amounts such as a torque, a speed and the like of a servo motor 13 for driving a plate cylinder of each printing unit 10, a log memory for storing the motor driving state amount detected by the means 22, 23 as log data, and an output processor 26 for processing to display the amount stored in the memory 25 on a display unit 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating condition monitoring device for a rotary printing press, and more particularly to an operating condition monitoring device for a rotary printing press that synchronously drives a plurality of printing units.

[0002]

2. Description of the Related Art A rotary printing press has a plurality of printing units provided with a plate cylinder, an impression cylinder, and the like, and a plate cylinder driving servomotor provided for each printing unit is synchronized between the printing units. 2. Description of the Related Art A multiple rotary press that performs speed control is known.

Further, as a drive control device for a rotary printing press,
Japanese Patent Laid-Open Publication No. 10-505029 discloses a folding machine as an example, in which a rotation angle position of a motor drive device is detected by a signal generator, and a detected value (an instantaneous current value of the rotation angle position) and a target value are determined. In comparison with real time, it is shown that the apparatus is quickly stopped when the rotation angle position exceeds a preset allowable value.

[0004]

In the above-described multiple rotary printing press, the operation at the time of machine start-up and maintenance can be performed smoothly, and the synchronism between specific printing units becomes abnormal. In order to estimate which printing unit's motor operation is abnormal, a state quantity indicating the driving state of the plate cylinder driving servomotor of each printing unit,
For example, there may be a case where the user wants to know a torque, a speed, or the like, or a state quantity indicating the synchronization between the printing units, for example, a history of synchronization errors (time-series data).

However, in the motor drive control technique disclosed in Japanese Patent Application Laid-Open No. 10-505029, only the rotational angle position is monitored and the machine is stopped. The history of (speed fluctuation and torque fluctuation) cannot be grasped.

Therefore, it is possible to judge that the rotational angle position of the motor driving device is not normal, but it is possible to grasp the driving state of the plate cylinder driving servomotor of each printing unit and the synchronization history between the printing units. It is difficult to find the cause of the abnormality.

For this reason, in the related art, when the machine is started or maintenance is performed, it takes time and when the synchronization between the specific printing units becomes abnormal, the motor operation of any of the printing units becomes abnormal. There is a problem that it takes a long time to estimate whether or not it is.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and allows an operator to easily record the driving state of a plate cylinder driving servomotor of each printing unit and the synchronization history between each printing unit. It can be grasped, the machine startup and maintenance work can be performed smoothly, and if the synchronization between specific printing units becomes abnormal, it is easy to estimate which of the printing unit's motor operation is abnormal It is an object of the present invention to provide an apparatus for monitoring the operation state of a rotary printing press.

[0009]

In order to achieve the above object, an operation state monitoring apparatus for a rotary printing press according to the present invention comprises a plurality of printing units having a plate cylinder, an impression cylinder, and the like. A printing cylinder driving servomotor for each printing unit, wherein the printing cylinder driving servomotor provided for each printing unit is synchronized between the printing units to perform speed control. Motor driving state amount detecting means for detecting a motor driving state amount such as torque, speed, and the like; storage means for storing the motor driving state amount detected by the motor driving state amount detection means as log data; and And output control means for performing a process of displaying the motor driving state amount stored as log data on the display means.

According to a second aspect of the present invention, there is provided an operation state monitoring apparatus for a rotary printing press, wherein a synchronization error is detected by comparing the motor driving state quantities of a plurality of different printing units detected by the motor driving state quantity detecting means. And the output control means performs a process of displaying the synchronization error data by the synchronization error detection means on a display means.

According to a third aspect of the present invention, there is provided an apparatus for monitoring an operation state of a rotary printing press, comprising an operation panel, wherein the output control means reads out data selected according to a request from the operation panel from the storage means. To perform a process of displaying on the display device.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an embodiment of an apparatus for monitoring the operation state of a rotary printing press according to the present invention. This rotary printing press has a plurality of (n) printing units 10 (printing units # 1 to #n) in a row.

Each of the printing units 10 includes a plate cylinder 11, an impression cylinder 12, a guide roller (not shown), and a plate cylinder driving servomotor 13 which is driven by the plate cylinder driving servomotor 13 for each printing unit 10. Plate cylinder 1 of printing unit 10
1 is synchronously driven between the printing units 10.

The plate cylinder driving servo motors 13 of the respective printing units 10 are individually connected to servo drivers 15 of the respective printing units 10 by power lines 14, and each of the servo drivers 15 is a servo controller of a drive controller 20. 21 to input torque commands T1 to Tn for each printing unit 10,
The power supplied to the plate cylinder driving servomotor 13 of each printing unit 10 is controlled according to the torque commands T1 to Tn.

The servo control unit 21 controls each printing unit 10
The feedback signals F1 to Fn related to the motor position are input from a position detector 16 such as a rotary encoder connected to the plate cylinder driving servomotor 13 of each printing unit 1.
0, a position control loop for each plate cylinder drive servomotor 13;
A general feedback control including a speed control loop is performed, and the speed control of the plate cylinder driving servomotor 13 of each printing unit 10 is performed while synchronizing between the plate cylinder driving servomotors 13 of each printing unit 10. The torque commands T1 to Tn are output to the servo driver 15 of the printing unit 10.

The drive control device 20 serves as a motor drive state amount detecting means for monitoring the operation state, a speed detector 22 for detecting the speed of the plate cylinder driving servomotor 13 of each printing unit 10, and a torque. A torque detector 23,
A synchronization error detection unit 24, a log memory 25 that stores the motor speed detected by the speed detector 22 and the motor torque detected by the torque detection unit 23 for each printing unit 10 in time series as log data, Log memory 25
And an output processing unit 26 for performing a process of displaying, on the display 28, the motor driving state quantities (motor speed and motor torque) stored in the display unit 28 and the synchronization error data from the synchronization error detection unit 24.

In this control system, the servo control unit 21 controls the speed data of each servo motor 13 in order to maintain the synchronization of the motors between the printing units and the servo motor 13 in order to give a torque command to each servo driver. Since the torque detector 22 has torque data, the speed detector 22 and the torque detector 23 need not use any special measuring means or new arithmetic processing, and can use servo data in the form of diverting data originally possessed by the servo control unit 21. It can be obtained from the control unit 21.

The synchronization error detector 24 compares the motor speeds of the plurality of printing units 10 detected by the speed detector 22 or the motor torques of the different printing units 10 detected by the torque detector 23. , A synchronization error is detected.

The synchronization error detecting section 24 may calculate a synchronization error according to a request. The synchronization error detecting section 24 acquires log data relating to motor speed and motor torque from a log memory 25, and performs synchronization based on the log data. Perform error calculation.
The synchronization error data calculated by the synchronization error detection unit 24 can also be stored in the log memory 25 as one piece of log data. In addition, in a multiple rotary press,
If the drive control device has a function equivalent to that of the synchronization error detection unit 24, the data of the same can be used.

An operation panel 27 including a keyboard, various switches, and the like, and a display 28 such as a CRT and an LCD are connected to the drive control device 20 as a man-machine interface. Note that a printer can be added as a man-machine interface, and a communication unit can be added.

The display 28 displays the motor speed of each printing unit 10 stored in the log memory 27 as log data,
The motor torque and the synchronization error data calculated by the synchronization error detection unit 25 are displayed in a time-series graph.

The display contents of the log data on the display 27 can be selected according to a request from the operation panel 26. That is, when there is a log data display request from the operation panel 26, the output processing unit 26 analyzes the display request and reads log data (motor speed, motor torque) according to the request from the log memory 25, or performs synchronization. A drawing process for instructing calculation of error data and displaying a graph on the display 28 is performed.

As illustrated in FIG. 2, the motor speed and the motor torque can be displayed simultaneously and vertically on the designated printing unit X with the same time axis. As shown in FIG. 3, a graph between two designated printing units XY can be displayed in a graph.

The graphical display as described above allows an operator to easily grasp the speed / torque state quantity of each printing unit motor and the synchronization error between each printing unit motor.

As for the method of displaying each data, there is a method of always displaying data by providing a dedicated display. However, since this data display is not always necessary, it is necessary to display the data when the display 28 of the system needs it. The display method is realistic.

For example, by inputting a switch for displaying data for each printing unit provided on the operation panel 27, the servomotor state quantities (torque, speed) of the printing unit corresponding to the input switch are shown in FIG. As shown, it can be displayed on the display 28 at any time.

As for the state quantity (synchronization error) for checking the synchronism between the printing units, two switches corresponding to the printing units to be displayed are turned on, and as shown in FIG. Can be displayed at any time.

Although the present invention has been described in detail with reference to specific embodiments, the present invention is not limited to these embodiments, and various embodiments may be made within the scope of the present invention. The possibilities will be clear to the skilled person.

[0030]

As will be understood from the above description, according to the operation state monitoring apparatus for a rotary printing press according to the first aspect of the present invention, the motor drive state amount detection means including the speed detection section, the torque detection section, and the like are used. The detected motor drive state quantities (speed, torque) are stored in the storage means as log data,
Since the output control means performs a process of displaying the motor drive state amount stored as log data in the storage means on the display means, the state amount of the drive system can be grasped even at the time of machine start-up, maintenance, and normal operation. If an abnormality occurs in the drive system, it is easy to determine which printing unit is abnormal from the state quantities, and the speed and torque states at the time of abnormality can be grasped.

In addition, the adjustment of the drive system at the time of starting up the machine and at the time of maintenance can be adjusted for each printing unit based on the state quantity, thereby increasing the efficiency of the adjustment work.

According to the apparatus for monitoring the operation state of a rotary printing press according to the second aspect of the present invention, the synchronous error detecting means detects the motor driving state quantities of the plurality of different printing units detected by the motor driving state quantity detecting means. The synchronization error is detected by the comparison, and the output control means performs the processing of displaying the synchronization error data by the synchronization error detection means on the display means. It is easy to estimate whether the motor operation is abnormal, and even if the system does not judge that it is abnormal, since the state quantities can be compared between each printing unit, even if it seems that the motor is operating normally, A printing unit having a large torque value and a printing unit having a large speed fluctuation can be identified, and the system can be prevented from being stopped due to an abnormality.

According to the third aspect of the present invention, the output control means reads the data selected from the storage means in response to a request from the operation panel and displays the data on the display. Since the processing is performed, necessary data can be displayed when needed, and a display attached to the system can be used.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a device for monitoring the operation state of a rotary printing press according to the present invention.

FIG. 2 is an explanatory diagram showing an example of a screen display of a motor speed and a motor torque in the operation state monitoring device for a rotary printing press according to the present invention.

FIG. 3 is an explanatory diagram showing a screen display example of a synchronization error between printing units in the operating state monitoring device for a rotary printing press according to the present invention.

[Explanation of symbols]

 Reference Signs List 10 printing unit 11 plate cylinder 12 impression cylinder 13 plate cylinder driving servomotor 14 power line 15 servo driver 16 position detector 20 drive control device 21 servo control unit 22 speed detector 23 torque detector 24 synchronization error detector 25 log memory 26 Output processing unit 27 Operation panel 28 Display

Claims (3)

[Claims] 1. A rotary press having a plurality of printing units including a plate cylinder and an impression cylinder, and performing speed control while synchronizing a plate cylinder driving servomotor provided for each printing unit between the printing units. In the printing press operating state monitoring device, the motor driving state amount detecting means for detecting the motor driving state amount such as the torque and speed of the plate cylinder driving servomotor of each printing unit; and Storage means for storing the motor drive state quantity as log data, and output control means for performing processing for displaying the motor drive state quantity stored as log data in the storage means on a display means. A feature of this invention is an operation state monitoring device for a rotary printing press. 2. A synchronous error detecting means for detecting a synchronous error by comparing the motor driving state quantities of a plurality of different printing units detected by the motor driving state quantity detecting means, and wherein the output control means is provided with the synchronous control means. 2. The apparatus according to claim 1, wherein a process of displaying the synchronization error data by the error detection unit on the display unit is performed. 3. An operation panel, wherein said output control means performs a process of reading data selected in response to a request from said operation panel from said storage means and displaying it on said display. Item 3. An operation state monitoring device for a rotary printing press according to item 1 or 2.