JPS60255439A - Method for continuous processing of printed matter - Google Patents

Abstract

PURPOSE:To recuce correction quantity at every one time by eliminating the accumulation of an error, by correcting the number of rotations of a post- processing roll on the basis of the average error between the signal of a sensor up to the previous time and the processing bit position of an encoder. CONSTITUTION:In a continuous processing apparatus wherein encoders 3, 4 are respectively attached to the end parts of the feed roll 1 of printed raw cloth 10 and a post-processing roll 2 for performing post-processing such as punching, bag manufacturing or cutting, the signal obtained by detecting the register mark of the stock cloth 10 by a sensor 9 is coincided with the bit position of the encoder 4 and, thereafter, the definite number (e.g., 20) of the register marks of the stock cloth 10 is determined as one set and the number of rotations of the post-processing roll 2 is changed corresponding to the average error between the signal from the sensor 9 and the bit position of the encoder 4 by a stepless transmission 6 and, in this state, the shift between the signal from the sensor 9 and the bit position of the encoder 4 is corrected by the rotation of a correction motor 8 and, at the same time, the average error of one set is calculated.

Description

[Detailed Description of the Invention] [Technical Field Applied] The present invention is a method of punching out labels from a continuous film printed with plastic film, paper, aluminum foil, or a laminated film of these in accordance with the printing process. The present invention relates to a continuous processing method for printed matter that can automatically correct errors between printing positions and post-processing positions that occur during post-processing such as bag making and cutting.

[Prior art and its problems]

As shown in Figure 1, the continuous processing equipment for printed matter currently in use consists of a raw material feed roll (1) and a post-processing roll (2).
), and encoders (3) and (4) equipped with a large number of radial bits are installed at one end of each roll, and a drive motor (5) controls the feed roll (1) and post-processing. It drives the roll (2).

Transmission from the drive motor (5) is via a gear to the feed roll (1), a chain to a continuously variable transmission (6) with a built-in variable speed motor, and a differential gear to the post-processing roll (2). It is said that.

In addition, on the opposite side of the encoder (4) of the post-processing roll (2), there is a correction motor (8) that changes the rotation speed of the post-processing roll.
and a sensor (9) for detecting register marks on the film (10).

In this device, the deviation between the signal detected by the sensor (9) and the processing position of the encoder (4) provided on the post-processing roll is corrected by rotating the correction motor (8), and the post-processing position is corrected to the normal position. and went on.

In addition, as shown in FIGS. 2 and 6, a correction motor (
11) and moved the correction roll (12) up and down to make the same correction.

However, when performing post-processing by comparing the position of the encoder and the sensor signal, it is sufficient if the state is completely synchronized, but in reality, the encoder position and sensor position are far apart, so the tension This was extremely difficult because it was affected by fluctuations in the flow rate, expansion and contraction of the original fabric, and the condition of the equipment.

Furthermore, since deviations in printing pitch also occur within a certain range during the printing process, correction using a correction motor via a differential gear is insufficient, and during operation of the equipment, a continuously variable transmission is used to rotate the post-processing roll. had to be corrected.

Corrections using the continuously variable transmission were made when it was visually confirmed that synchronization had occurred.

In this way, even though the equipment was equipped with self-control correction equipment, there were cases in which it was not possible to make full use of it.

In addition, there is a risk that the synchronization difference between the sensor signal and the encoder processing bit position may occur only depending on the machine condition (otherwise normal). There was a risk of synchronization loss occurring.

[Means for solving problems]

In the present invention, after matching the signal detected by a sensor from the register marks provided on the film with the machining position of a large number of radially provided bits on the post-processing axis, a certain number of register marks provided on the film are processed. (For example, 2
0 pieces) as one set, the number of revolutions of the post-processing roll is changed by the continuously variable transmission by the average error between the sensor signal and the encoder processing bit position, and in this state, the sensor signal and encoder processing bit position are changed in the same way as above. This is a continuous processing method for printed matter in which the positional deviation is corrected by rotating a correction morph, and at the same time, a set of average errors is calculated as described above.

[For production]

Since the rotational speed of the post-processing roll is corrected in advance based on the average error between the sensor signal and the encoder processing bit position up to the previous time, deviations caused simply by the machine can be eliminated.

Furthermore, the accumulation of errors due to continuously occurring deviations can be eliminated, and the amount of correction to be performed each time is reduced.

〔effect〕

Since the present invention operates as described above, it is possible to correct only the error that is actually correct, and each correction is based on the average error of the sensor signal and encoder processing bit position. Since the number of rotations of the post-processing rolls is adjusted in advance, the number of rotations required is small and can be corrected automatically.

Furthermore, since slight but continuous deviations are eliminated in stages, continuous deviations can now be corrected automatically.

[Brief explanation of drawings]

FIGS. 1, 2, and 2 are explanatory diagrams of the processing apparatus used in the present invention. Patent applicant Toppan Printing Co., Ltd. 4' Representative Kazuo Suzuki Cause 1 Figure 2

Claims (1)

[Claims] A feed roll that feeds the printed continuous film at a constant speed.
It consists of a post-processing roll that processes the fed film, and a sensor that detects register marks provided on the film.The post-processing roll is equipped with an encoder with a large number of radial bits, and the feed roll is driven by a drive motor. In a continuous processing device that has a mechanism that is driven via a continuously variable transmission with a built-in variable speed motor and a differential gear equipped with a correction motor, the post-processing roll is directly processed by the signal detected by the sensor of the register mark. After aligning the position of the encoder machining pit provided on the post-processing roll, a certain number of register marks are set as 1 set and 1~,
Calculate the average error between the signal detected by the sensor and the machining bit position of the encoder, calculate this error, and change the rotation speed of the post-processing roll by the amount of this error.1. Correcting each error between the signal and the encoder machining pit position by correcting the post-processing roll by a motor, and correcting the error by the fixed number of times between the sensor signal and the encoder machining bit position,
A continuous processing method for printed matter characterized by repeatedly changing the rotational speed of a post-processing roll using a continuously variable transmission.