JPS5824275B2 - Automatic operation control device for web-type offset rotary printing presses - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for successively sequentially controlling each stage of operation in a rotary offset printing press, including BB type and zatellite type, according to a predetermined order.

According to the present invention, the operation stage of the paper inspection mechanism at the start of printing and the operation stage of supplying, attaching and detaching water, ink, blanket cylinders, etc. during printing operation are determined in advance in time in relation to the rotational speed of the plate cylinder. , by correlating the completion of the control operation in the previous stage with the start of the control operation in the next stage, and automating the printing operation through sequence control, saving labor and time and eliminating waste due to paper waste. The purpose is to make this possible.

To summarize the concept of the present invention, there is an automatic control system that includes a paper inspection stage during the development of a printing operation that relates each operation at each stage from startup to steady operation, and from steady operation to normal stop. The point is to provide a steady course consisting of an automatic control system during normal stoppage of the printing operation, which relates each operation at each stage up to.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure and operation of the present invention will be explained in detail below using a specific example and drawings.

First, the work of attaching plates (not shown) to the plate cylinders 5 and 5a is carried out using rollers 6 and 5a for the swimsuit, and rollers 7 and 7 for ink.
This is done manually after confirming that the plate cylinders 7 and 7a, 7a and the plunket cylinders 8 and 8a are separated from the peripheral surfaces of the plate cylinders 5 and 5a, respectively.

After the installation of the plate is completed, an operation for cleaning and removing the thin rubber film adhering to the plate surface is automatically carried out, but since it is not the main point of the present invention, its explanation will be omitted.

Automatic control of printing operation can be roughly divided into a stage from startup to steady operation, and a stage from steady operation to normal stop.

First, at point A in FIGS. 2 and 3, the print run button and the autorun button are both turned ON either manually or automatically in response to the signal indicating the completion of the plate cleaning automatic control stage, and the rotary press starts running. At the same time as starting, the folding section 10
The power transmission clutch is turned on and the machine operation button is turned on, and the speed of the rotary press is automatically increased.

By inputting the signal indicating the completion of the starting stage, approximately 60 minutes after starting
Sequentially within seconds and within the plate cylinder rotational speed of 100 rpm,
The following operations B, C, D, and E are preset to be performed.

That is, at point B, at the same time as the blanket cylinders 8 and 8a come into contact with each other, the blanket cylinder and the plate cylinder come into contact, which is called an impression, and the running paper 9a is fed by the infeed roller 15.

Next, at point C, the water supply mechanism is activated, the drive motor for the water source rollers 13, 13a is turned on, and after a short delay, for example, 1 second, the swimsuit is brought into contact with the plate cylinders 5, 5a of the rollers 7 and 7a. Each will be done.

Further, at point D, the ink supply mechanism operates, and the drive motor (not shown) of the ink source roller 14° 14a is activated.
N1 ink is deposited on the plate cylinders 5, 5 of rollers 7, 7a, 7a.
Contact with a is made sequentially.

Then, at the last point E, infeed roller 1
5 turns off the nip feed.

This operation is no longer necessary because the paper is fed by the blanket cylinder at this point.

In this way, after starting, when all of the operations set in stages at each time point B, C, and D are completed, printing is performed on the running paper 9a by the blanket cylinders 8 and 8a, and the running paper after printing is completed. is conveyed to the folding section 10, folded, and at the same time cut into a certain length t. Immediately after this cutting is completed, the printed paper is pulled out by a paper inspection mechanism (not shown) to a minimum number of copies, for example, about 2 copies. It is necessary for the worker to inspect the ink for adhesion, unevenness, and the suitability of the mounting position of the plate.

Therefore, in order to incorporate this paper inspection operation into the automatic operation control system, the automatic speed increase of the rotary press is stopped at point F, when the rotation speed of the plate cylinders 5 and 5a reaches approximately 1100 rpm, and the rotary press is switched to constant speed operation. At the same time, it commands the operation of the paper inspection mechanism.

This constant-speed operation stage for paper inspection usually lasts within several seconds to 10 seconds, so at the 0 point after the set time has elapsed, the speed of the rotary press is automatically increased again after waiting for the paper inspection completion signal to be input.

The rotational speed of the plate cylinders 5, 5a is successively increased by the auto-run mechanism, and for example, 60 seconds after starting, the rotational speed reaches approximately 60.
When the speed reaches 0 rpm, the plate cylinder enters a steady operation phase in which the rotational speed is constant from that point onward.

In addition, in the above embodiment, the blanket cylinder 8.8a at point B
The arrangement is such that mutual contact of the water and ink supply mechanisms precedes activation of the water and ink supply mechanisms.

This is a program suitable for printing on paper such as newspapers; in the case of commercial printing on higher quality paper, the mutual contact of the bracket cylinders 8, 8a is carried out after the water and ink supply mechanisms are completed. It is desirable that

When printing is completed or it is desired to take a break, the automatic control system normally used when printing is stopped operates as shown below.

First, after manually turning on the printing section operation stop button,
Approximately 10 seconds before the time when the operation of the printing section was realized, and the number of rotations of the plate cylinders 5, 5a is approximately 1.0 Or
The next operation is set to be performed sequentially at the previous stage within pm.

That is, first, at point L, the operation of the ink supply mechanism is stopped, the first drive motor of the ink source rollers 14, 14a is turned off, and the ink is deposited on the rollers 7, 7, 7a, 7a.
is removed from the plate cylinders 5, 5a, and then, at point M, the operation of the water supply mechanism is stopped and the motor for driving the water base rollers 13, 13a is turned off.

In the swimsuit, the roller 6.6a is detached from the plate cylinders 5, 5a, and furthermore, at point N, the blanket cylinders 8, 8a are detached and the infeed roller 15 is fed in place of O.
It becomes N.

It is desirable to provide a time difference of about 5 seconds between the above-mentioned point and the M point, so that the ink adhering to the printing plate surface is cleaned up by water, and subsequent processing of the printing cylinder is advantageous.

In this way, about 60 seconds have passed since the command to stop the printing section
At this point, the brake button for automatically stopping the printing section is ON1.
The printing operation button is turned OFF, the autorun button is turned OFF, and all normal stops are completed.

When restarting after a long break, the plate surface is coated with a thin rubber film to prevent it from oxidizing at the time of the break, and it must be removed, so the process begins with automatic cleaning of the plate surface.

Restarting after a short break is set to start from point B after manually turning on the autorun button.

As mentioned above, in the present invention, the printing operation, which has conventionally been performed entirely manually depending on the experience and skill of the operator, can be changed to Since the sequence IIJtl can be set in a predetermined order in relation to the completion of operations, and the operations proceed automatically one after another, the occurrence of paper waste can be greatly reduced, and the labor and time of workers can be greatly reduced. This has made it possible to save money and reduce work errors.

[Brief explanation of drawings]

The drawings show a specific embodiment of the invention. Figure 1 is an explanatory diagram showing the configuration of each part of a rotary offset printing press that is sequence-controlled. Figure 2 is a time chart showing each control stage in relation to the passage of time and plate cylinder rotation speed. Figure 3 is 2 shows a flowchart illustrating automatic control of printing steps. 5 and 5a... plate cylinder, 6 and 6a...
Swimsuit is on rollers, 7, 7 and 7a, 7a... Ink coat is on rollers, 8 and 8a... Blanket body, 9a... Running paper, 10...・Oribe, 1
1...Clutch for transmitting power to the folding section, 12...
...Main morph, 13 and 13a... Water source roller, 14 and 14a... Ink source roller, 15... Infeed roller.

Claims (1)

[Scope of Claims] 1. A starting stage in which the autorun button is manually turned ON and the printing part is started while the clutch for transmitting power to the folding part is turned on, and an input signal indicating the completion of the starting stage is used for about 10 minutes after starting. Within seconds and within the plate cylinder rotation speed of 1100 rpm, the following operations are performed sequentially: contact of the plunket cylinder, infeed roller feed ON, water supply mechanism operation, ink supply mechanism operation, and infeed roller feed OFF. a step immediately after starting, in which the steps are set to be performed sequentially, and a rotation speed of the plate cylinder at 100 rpm after the step immediately after starting.
There is a constant speed operation stage for paper inspection in which the automatic speed increase of the rotary press is stopped for a few seconds and the operation of the paper inspection mechanism is commanded when the speed reaches 100. an automatic control system during the development of printing operation consisting of a steady operation stage in which speed increase is stopped and constant speed operation is started upon input of a signal that detects that the rotation speed of the printer has reached a certain number of rotations; After turning on the printing unit operation stop button at Stopping the operation of the supply mechanism, stopping the operation of the water supply mechanism, detaching the blanket cylinder, and feeding the infeed roller.
An automatic operation control device for a web-type offset rotary printing press, comprising: an automatic control system during a normal stop of printing operation, which is set to perform N sequentially; 2. The automatic operation control device according to claim 1, wherein the contacting operation of the blanket cylinder is performed after the ink supply mechanism is activated immediately after startup.