JPH10109801A - Winding device for continuous paper delivered from printing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change tension applied to a continuous paper according to a winding diameter and make a tension change have no influence on a printing machine side in a winding device for winding, in a roll shape, the printed continuous paper delivered from the printing machine. SOLUTION: This winding device 1 is provided with three driving rollers 17, 18 and 19 whose rotational speed is micro-changeable on the transfer route of a continuous paper 3, from a printing machine 2 to a winding core 16. The driving roller 18 is constituted of a vacuum roller. By changing tension applied to the continuous paper 3 on the winding core 16 side by adjusting the rotational speed of the driving rollers 17, 18 and 19, tension is decreased gradually if a winding diameter exceeds a prescribed one. At the same time, by adjusting air sucking force of the vacuum roller and contact strength with the continuous paper 3, a sliding ratio of the vacuum roller to the continuous paper 3 is adjusted, continuity of tension against the continuous paper 3 is cut off, it is possible to make a tension change on the winding core 16 side have no influence on the printing machine 2 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding device for winding printed continuous paper discharged from a printing press in a roll shape around a winding core, and more particularly, to a winding device that adjusts the size of a winding diameter. The present invention relates to a winding device that changes the tension and does not affect the change in the tension on the printing press.

[0002]

2. Description of the Related Art Conventionally, a winding device for winding a printed continuous sheet discharged from a printing press into a roll is provided with a dancer roller and a tension pickup, and the continuous sheet is wound from the start to the end of winding. Is wound with a certain tension.

[0003]

For this reason, in the prior art, as the winding diameter increases, the tension increases, and the continuous paper near the winding core is pulled and stretched. Therefore, when the rolled continuous paper is drawn out and used, when the paper is close to the core, the continuous paper in the stretched state contracts at the moment when it is released from tension due to the characteristics of the paper. Cause a phenomenon. When such a phenomenon occurs, when the rolled continuous paper is pulled out by a collating machine and collated, the paper shrinks, and the pitch of the printed portion corresponding to the page to be collated is reduced. Is shortened, so that an appropriate collation cannot be performed.

In order to solve this inconvenience, during winding, the tension is changed in accordance with the size of the winding diameter, the tension is increased near the winding core, and the tension is increased when the winding diameter becomes larger than a certain value. It should be weakened gradually.
However, when the tension at the time of winding is changed in this way,
The change in the tension also affects the printing press, which causes a new disadvantage that proper printing cannot be performed.

The present invention solves these disadvantages, and when winding continuous paper into a roll, the tension applied to the continuous paper can be changed according to the winding diameter.
An object of the present invention is to provide a continuous paper winding device that does not exert the change in the tension on the printing press side.

[0006]

According to the present invention, there is provided an apparatus for winding a continuous paper discharged from a printing press according to the present invention. A take-up device for taking up a sheet of paper in a roll around a winding core, wherein a paper transfer mechanism is provided on a transfer path of continuous paper from the printing press to the winding core. By changing the speed difference from the paper winding speed by finely adjusting the transfer speed of the paper, the tension applied to the continuous paper on the winding core side can be changed, and this tension is gradually increased when the winding diameter becomes a certain value or more. On the other hand, the slip rate of the continuous paper can be adjusted to cut off the continuity of the tension on the continuous paper so that the change in the tension applied to the continuous paper on the winding core side does not affect the continuous paper on the printing press side. What It is those that you have configured.

According to a second aspect of the present invention, there is provided an apparatus for winding continuous paper discharged from a printing press, wherein the printed continuous paper discharged from the printing press is wound around a core in a roll shape. A plurality of drive rollers, for example, three drive rollers, whose rotation speed can be slightly changed, on a transfer path of continuous paper from the printing press to the winding core. In addition to providing a paper transport mechanism that is arranged so that the peripheral surfaces are in contact with each other, one of a plurality of drive rollers, for example, a central one of three drive rollers is replaced with a vacuum roller that sucks air from the peripheral surface. By adjusting the rotation speed of these drive rollers to change the speed difference from the paper winding speed, the tension applied to the continuous paper on the core side can be changed. Gradually becomes weaker when a certain value or more, while adjusting the air suction force of the vacuum roller to adjust the close contact between the vacuum roller and the continuous paper, the vacuum roller and the continuous paper that comes in contact with the vacuum roller. The slidability is adjusted so that the continuity of the tension on the continuous paper is interrupted so that the change in the tension on the winding core side does not reach the printing press side.

[0008] The change in the tension with respect to the continuous paper during the above-mentioned winding is as follows. For example, when the final winding diameter is 1000 mm, the tension at the winding core is set to about 15 kg, and the winding diameter is reduced to about 300 mm. It is preferable that the tension is gradually reduced when it reaches the point, and finally the tension is set to about 10 kg. Generally, 30% of the final winding diameter
When the take-up diameter reaches a certain level, the tension starts to be reduced, and when the final take-up diameter is reached, the tension is reduced to 7 at the beginning of the take-up.
It may be adjusted to be about 0%.

Further, when the paper transport speed of the paper transport mechanism is changed, the sliding rate with respect to the continuous paper in contact is changed. By adjusting the sliding rate, the paper transport speed is changed, that is, the core side is changed. The change in tension can be prevented from reaching the printing press. More specifically, for example, it is possible to adjust the slip ratio by adjusting the adhesion to the continuous paper, and when a vacuum roller is used for the paper transport mechanism, the air suction force of the vacuum roller is adjusted to adjust the continuous paper. And the slip ratio can be adjusted by adjusting the adhesion to the substrate. That is, as the adhesiveness is increased, the slip ratio decreases.

[0010]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a schematic front view of the winding device.

As shown in FIG. 1, a printed continuous paper 3 discharged from a printing press 2 has a plurality of guide rollers 5, 6, 7, rotatably supported by a body 4 of a winding device 1.
After 8, 9, 10, 11, 12, 13, 14, 15,
A winding core 16 linked to a suitable rotation drive system (not shown)
It is configured to be wound into a roll.

Between the guide roller 14 and the guide roller 15 in the transfer path of the continuous paper 3, three drive rollers 17, 18, and 19 capable of slightly changing the rotation speed are provided. The paper transfer mechanism is arranged so that the paper contacts. The three drive rollers 17, 18,
The drive roller 18 located at the center of the drive roller 19 is a vacuum roller, which is hollow (not shown) and has a suction hole formed on the entire peripheral surface, and is connected to a negative pressure suction device (not shown). Therefore, when the negative pressure suction device is driven, air is sucked from the peripheral surface of the drive roller 18.

The driving rollers 17, 18, 1
9, the tension applied to the continuous paper 3 when it is wound on the winding core 16 is changed. When the winding diameter exceeds a certain value, the tension is gradually reduced. 3 is configured to be prevented from being stretched by being pulled, and to be able to be always wound up in a normal state.

Further, by adjusting the adhesion between the continuous roller 3 and the continuous paper 3 in contact with the drive roller 18 by the air suction force of the driving roller 18, the slip ratio between the continuous roller 3 and the drive roller 18 is adjusted. The configuration is such that the continuity of the tension with respect to the continuous paper 3 is interrupted, and the change in the tension on the winding core 16 side does not reach the printing press 2 side.

Further, the driving roller 19 and the guide roller 1
5, a tension pickup 20 for applying a constant tension to the continuous paper 3 is disposed. The tension pickup 20 moves up and down to adjust the position, thereby setting the tension at the start of winding of the continuous paper 3.

Since this embodiment is configured as described above,
The printed continuous paper 3 discharged from the printing press 2 is rotated by the driving forces of the driving rollers 17, 18, 19 to guide the rollers 5, 6, 7, 8, 9, 10, 11, 12, 1.
From the rollers 3, 14, the drive rollers 17, 18, 19, the tension pickup 20, and the guide roller 15 are wound around the winding core 16. In this winding operation, the winding diameter of the continuous paper 3 is 30% of the final winding diameter.
When it reaches the degree, the tension starts to be reduced, and when the final winding diameter is reached, the tension is adjusted so as to be about 70% of the initial winding.

The adjustment of the tension is determined by the speed difference between the paper winding speed of the winding core 16 and the paper transfer speed of each of the drive rollers 17, 18, and 19. Therefore, the tension on the continuous paper 3 increases. Then, each drive roller 17, 1
The change in the paper transfer speed due to the drive rollers 1 and 8
The slip ratio between the continuous papers 7, 18, and 19 and the continuous paper 3 that comes in contact with them is changed.

The winding core 16 for such continuous paper 3
The change in the tension on the side affects the printing press 2 in the normal state due to the change in the slip ratio described above. Here, the continuity of tension can be interrupted by adjusting the suction force of the drive roller 18 to adjust the adhesion between the continuous paper 3 and the peripheral surface of the drive roller 18 and adjusting the slip rate. As a result, a change in the tension of the continuous paper 3 on the winding core 16 side does not reach the printing press 2 side. Therefore, printing on the continuous paper 3 by the printing press 2 is performed normally without being affected by the change in tension.

The present invention is not limited to the above-described embodiment.
Need not necessarily be provided. In addition, the driving roller 17,
The number of rollers 18 and 19 is not necessarily limited to three, and one roller that contacts the vacuum roller and the peripheral surface may be configured by a guide roller having no driving force. Further, the paper transport mechanism includes a plurality of drive rollers 1 including a vacuum roller.
7, 18, 19, regardless of the drive rollers 17, 18, 19
And a pressure roller capable of adjusting the pressure force.

[0020]

As described above, according to the first aspect of the present invention, the operation of winding the continuous paper onto the winding core can be performed smoothly and reliably from the beginning to the end of winding. Normal printing operation can always be performed without adversely affecting the printing press side, and furthermore, when the wound continuous paper is pulled out and used, the shrinking phenomenon of the continuous paper close to the core may occur. And an effect that normal use becomes possible.

According to the invention of claim 2 of the present application, the paper transport mechanism is constituted by a plurality of drive rollers including a vacuum roller. In this case, it is possible to more reliably and easily perform the change in the tension on the continuous paper and the interruption of the change in the tension on the printing press side.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing a preferred embodiment of a winding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Take-up device 2 Printing machine 3 Continuous paper 4 Body 16 Take-up core 17, 18, 19 Drive roller

Claims (2)

[Claims] 1. A winding device for winding printed continuous paper discharged from a printing press into a roll around a winding core, wherein the winding device is on a transfer path of the continuous paper from the printing press to the winding core. A paper transfer mechanism is provided, and this paper transfer mechanism can change the tension applied to the continuous paper on the winding core side by finely adjusting the transfer speed of the continuous paper and changing the speed difference with the paper take-up speed. The tension is gradually reduced when the winding diameter is equal to or larger than a certain value, while the tension applied to the continuous paper on the printing press side is controlled so that the change in the tension applied to the continuous paper on the winding core side does not reach the continuous paper on the printing press side. A winding device for a continuous sheet discharged from a printing press, wherein a slip rate of the continuous sheet can be adjusted to interrupt the continuity. 2. A winding device for winding printed continuous paper discharged from a printing press into a roll around a winding core, wherein the winding device is on a transfer path of the continuous paper from the printing press to the winding core. In addition, a paper transfer mechanism is provided in which a plurality of drive rollers capable of slightly changing the rotation speed are arranged so that the peripheral surfaces of adjacent ones are in contact with each other, and one of the plurality of drive rollers sucks air from the peripheral surface. By adjusting the rotation speed of these drive rollers to change the speed difference from the paper take-up speed, it is possible to change the tension applied to the continuous paper on the winding core side. While the winding diameter gradually becomes weaker when it becomes a certain diameter or more, the air suction force of the vacuum roller is adjusted,
By adjusting the adhesion between the vacuum roller and the continuous paper, the slip ratio of the vacuum roller and the continuous paper that comes into contact with the vacuum roller is adjusted, and the continuity of the tension with respect to the continuous paper is interrupted to thereby reduce the tension on the core side. Wherein the change of the printing paper does not reach the printing press side.