JPH0891657A - Device for judging cause of paper failure for rotary press printing machine - Google Patents

Abstract

PURPOSE: To provide a device for judging cause of paper failure, which can automatically specify the case of paper run-out and with which a unskillful worker can reset the malfunction part and accurately perform the paster work. CONSTITUTION: A ring buffer 3 inside of an electronic computer 2 takes in various detecting signal and the control signal 10 from a control and measuring device 1 per a constant time. The data stored in this ring buffer 3 is always renewed, and the old data is erased. When the paper is failure, the data before or after the paster (paper jointing) work is stored in the ring buffer 3, and compared with the value (specified value) of each data of the normal time, and value and kind of the data over the specified value is stored with data and time, and the content thereof is transmitted to a display unit 8 by an operator. On the other hand, in the case where paper failure is generated before the paster (paper jointing) work, feedback of the control signal 9 to the control and measuring device 1 is performed so as to correct the malfunction of the paster (paper jointing) work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet breakage factor determining device for a rotary printing press.

[0002]

2. Description of the Related Art A conventional paper breakage factor determination device for a rotary printing press will be described with reference to FIG. 3. 11a is a new reel (new paper roll), 11b is an old reel, 12 is a knife, and 13 is a paper splice (hereinafter referred to as pasta Brush), 14 is a guide roller, 15 is a tension detecting roller, 16 is paper, 17 is a printing unit of a rotary printing press, 18 is a load cell of the tension detecting roller 15, 19 is an amplifier, 20 is a meter, and 21 is a paper feed. Part, 22
Is a tension detecting device, and the tension detecting device 22 provided between the paper feeding unit 21 and the printing unit 19 detects the tension of the paper 16 and when the tension becomes zero, the paper break occurs. Was visually determined by the operator.

[0003]

In the conventional paper breakage factor determination device for a rotary printing press shown in FIG. 3, when the tension of the paper 16 becomes zero, the paper breakage is visually observed by the operator (operator). Although it is determined that it has occurred, the cause of the paper break is not only the tension of the paper 16 but also the operating speed of the machine before and after the paster, the current value of the new reel acceleration motor, the new reel peripheral speed, and the paper. The braking force that controls the tension, the pressing force of the pasta brush, the operation timing between the pasta brush and the knife, and the like.

It is only possible to rely on the long-term intuition of a skilled operator to identify whether a paper break is caused by a single factor or a plurality of factors are entangled with each other. It was difficult to identify the cause and restore the defective part. The present invention is proposed in view of the above-mentioned problems, and the purpose thereof is to automatically identify the cause of a paper break, and even an inexperienced operator can recover a defective portion, and perform paster work. An object of the present invention is to provide a sheet breakage factor determination device for a rotary printing press that can be accurately performed.

[0005]

In order to achieve the above-mentioned object, a device for determining a paper breakage factor of a rotary printing machine according to the present invention operates a machine before and after a splicing operation in a paper feeding section of the rotary printing machine. Speed, current value of acceleration motor of new reel, peripheral speed of new reel,
A control / measuring device for obtaining information on the tension applied to the paper, the braking force of the brake that controls the tension applied to the paper, the pressing force of the paper splicing brush, and the operation timing between the paper splicing brush and the knife, and these. It is composed of an electronic computer that collects the information of the above, stores and displays this information, and determines the factors of paper breakage, and feeds back the determination results by the electronic computer to the control / measurement device to correct defects. I am trying.

[0006]

The sheet-breakage factor determination device of the rotary printing machine according to the present invention is configured as described above, and the ring buffer in the electronic computer provides various detection signals and control signals from the control / measurement device at regular intervals. take in. The data in this ring buffer is constantly updated and old data is erased. When a paper break occurs, the data before and after pasta (paper splicing) work is saved in the ring buffer and compared with the normal value (regular value) of each data. Is stored with the date and time, and the contents are transmitted to the operator by the display, but before the pasta (paper splicing) work, the control signal is fed back to the control / measuring device, and the paster (paper splicing) work will not be performed. Will be fixed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a sheet breakage factor determination device for a rotary printing machine according to the present invention will be described with reference to an embodiment shown in FIGS. 1 and 2. Reference numeral 1 in FIG. 1 is a control / measurement device installed in various places of the printing machine. 2 is an electronic computer, and the ring buffer 3 in the electronic computer 2 has various detection signals from the control / measuring device 1, control signals 10, that is, knife control signals, paster (paper splicing) brush control signals, and tension. The detection signal, the paster (paper splicing) brush pressure detection signal, the new reel acceleration motor current detection signal, the new reel peripheral speed detection signal, the brake control force detection signal, and the paper cut detection signal are set for a certain time a (Fig. (See 2). The data in the ring buffer 3 is constantly updated, and old data is erased.

When a paper break occurs, the data collection operation is stopped after the data is fetched into the ring buffer 3 until a certain time b (see FIG. 2) set by the timer 4. The ring buffer 3 must be large enough to accommodate the data within the time c (see FIG. 2). When the data collection work is stopped, the data in the ring buffer 3 is transferred to the storage device 6 and stored therein, and information such as date and time is added to the data, which is compared by the arithmetic unit 5 with the value at the normal time to determine the cause of the abnormality. Is displayed on the display unit 8 via the interface 7. If you have not done pasta (paper splicing) work,
The control signal 9 is fed back to the control / measurement device 1,
Correct defects in pasta work.

[0009]

As described above, in the paper breakage factor determination device for a rotary printing machine according to the present invention, the ring buffer in the electronic computer fetches various detection signals and control signals from the control / measurement device at regular intervals. The data in this ring buffer is constantly updated and old data is erased. When a paper break occurs, the data before and after the paster (paper splicing) work is saved in the ring buffer, and compared with the normal value (regular value) of each data, and the data that does not fall within the specified value is classified as a value or type. Memorize with the date and time, and inform the operator of the contents on the display, but before the paster (paper splicing) work,
Since the control signal is fed back to the control / measuring device to correct defects in pasta (paper splicing) work, the cause of paper breaks can be identified automatically, and even inexperienced operators can recover the defective parts. The pasta work can be performed accurately.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of a paper breakage factor determination device for a rotary printing press according to the present invention.

FIG. 2 is an explanatory diagram showing timing of data acquisition.

FIG. 3 is an explanatory diagram showing a conventional paper breakage factor determination device for a rotary printing press.

[Explanation of symbols]

1 Control / Measurement Device 2 Computer 3 Ring Buffer in Computer 2 4 〃 Timer 5 〃 Computing Unit 6 〃 Storage Device 7 〃 Interface 8 Display 9 Control Signal from Computer 2 10 Detecting from Control / Measurement Device 1 Signals and control signals

Claims (1)

[Claims] 1. A running speed of a machine before and after a splicing operation in a paper feeding section of a rotary printing press, a current value of an acceleration motor of a new reel,
Control to obtain information about the peripheral speed of the new reel, the tension applied to the paper, the braking force of the brake that controls the tension applied to the paper, the pressure applied to the brush for paper splicing, and the operation timing of this brush for paper splicing and the knife.・ It consists of a measuring device and an electronic computer that collects this information, stores and displays this information, and determines the factors of paper breaks. A paper breakage factor determination device for a rotary printing press, characterized in that