JPS59138549A - Web winder - Google Patents

Abstract

PURPOSE:To prevent the occurrence of trouble in a presser by using one touch roll to exclude air brought in with a web, thereby preventing creases or slip of the wind in rolling a long film or sheet round a take-up shaft of a web winder. CONSTITUTION:A web W is a PET film which is 1m in width, 100mum in thickness and 1,700m in length. A web winder is adapted to take up the web at a winding speed of 100m/min. The long web W is rolled counter-clockwise round a take-up shaft 11 by power. A touch roll 12 is fixed to the forward end portion of a dancer lever 14 pivoted on a dancer shaft 13, and the touch roll 12 is pressed to the surface of the roll of the web rolled round the take-up shaft 11 through the lever 14 by a cylinder 15. A pneumatic or hydraulic cylinder 15 is used for pressing the touch roll.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a web winding device that winds a web onto a take-up shaft.

PRIOR ART If a wide and long Kuep is simply wound onto a winding shaft, air will be brought in between the webs along with the web, making the winding state unstable. This phenomenon of air being brought in between the webs becomes more pronounced as the web is wound up at higher speeds.

When the winding state becomes unstable, the winding of the web becomes misaligned, the winding becomes tight, and wrinkles occur inside the wound web. As a countermeasure against this problem, as shown in Fig. 1, the web W wound around the winding shaft 1 is pressed down from above by a touch roll 2 to block the air brought in with the web and to keep the winding state. Efforts have been made to stabilize the This touch roll 2
A winding device that presses the surface of the web W during winding to prevent air from being brought in between the webs is known, for example, from Japanese Patent Publication No. 55-1212.

However, all conventional touch rolls have a structure in which one touch roll is in pressure contact with the entire width of the web. Although such a taft roll is effective as a countermeasure against the above problem and stabilizes the winding of the web, it also has the following drawbacks.

(1) When the web is wound eccentrically and at high speed, the inertia of the tuft roll is large, so it cannot follow the eccentricity of the web and bounces, causing pressure failure on the web.

(2) When rubber rolls are used as the material for tattoo j-rolls, the frictional force is large, so if there are wrinkles on the web surface in the winding direction, they will be crushed, resulting in wrinkles. . In particular, in the conventional technology using one touch roll, since the touch roll is in pressure contact with the entire width of the web, it is not possible to extend the curls to the end faces in the width direction and eliminate them, resulting in wrinkles.

Purpose of the Invention The present invention aims at stabilizing the wound web by blocking the air brought in with the web when the web is wound around the winding shaft, and in order to achieve the above object, a single roller touch roll is provided. When using , the above (1) and (
The purpose is to eliminate the drawbacks of 2).

Structure of the Invention The above object is to provide a winding device comprising a winder for winding a wide long web, and a touch roll that presses the web wound by the winder from the surface of the winding. This is achieved by a web winding device characterized in that the touch roll is divided into two or more parts in the web width direction, and each of the divided touch rolls operates independently.

Furthermore, the effect is made more pronounced by independently controlling the pressing force of the divided touch rolls from the surface of the web roll.

That is, in the present invention, the touch roll is divided in the width direction to reduce the mass moment of inertia of each roll, and to ensure sufficient response to fluctuations in the winding surface of the web, thereby preventing pressure failures. I tried to get rid of it. In addition, the wrinkles that occur when winding the web due to division are removed (
This made it possible.

Embodiment FIG. 2 shows an embodiment of the present invention, and FIG. 2(a)
2(b) shows a side view perpendicular to the winding axis, and FIG. 2(b) shows a front view parallel to the winding axis.

The web W has a film width of 1rrL1 and a film thickness of 100μ.
This is a web winding device that winds up a PET film with a length of 1,700 m at a winding speed of 100,100 rrV. The present invention is effective as a device for winding up a wide long web having a web width of 50 cIrL or more at a high speed of 30 m/ml n or more.

Reference numeral 11 denotes a winding shaft which winds up the long web W in a counterclockwise direction as shown in FIG. 2(a) using power. In the example, the winding tension is 25
It is wound with such force that it becomes kg/rrL.

Reference numeral 12 denotes a touch roll, which is attached to the tip of a dancer lever 14 that rotates around a dancer shaft 13. A cylinder 15 winds up the touch roll 12 onto the winding shaft 11 via the dancer lever 14. It has a structure in which pressure is applied from the surface of the rolled web W. In this embodiment, the touch roll 12 is shown as being divided into three rolls, but the number of divisions varies depending on the situation and is not limited to three rolls. In order to respond to high vibrations that occur with speed, it is effective to increase the number of divided cylinders.The cylinder 15 uses air pressure or oil pressure, and in this embodiment, the touch roll for each touch roll is・The cylinder pressure was set to 0.5kl?/cIl.

In this embodiment, a pneumatic cylinder, a hydraulic cylinder, or the like is used as a method for pressing the touch roll, but the method is not limited to these methods, and force such as a nail or the weight of the touch roll may also be used.

When the web was wound under these conditions,
There were no wrinkles or deviations in the winding, and the winding could be stably and satisfactorily wound onto the winding shaft 11. Also, breakdowns due to pressure no longer occur.

In the embodiment shown in FIG. 2, all three dancer shafts 13, which are rotational axes of the touch roll 120, are coaxial, but their positions may be changed arbitrarily. For example, by changing the dancer axis 13 for each touch roll, the dancer axis may be moved back and forth to overlap the contact portions of the touch roll 12 and the web W, as shown in FIG.

Further, in the embodiment shown in FIG. 2, the web pressing force of each touch roll is the same, but it can be changed independently. Even when pressing a single conventional touch roll onto a web roll, it is effective to control the pressing force according to the size of the core, winding speed, distance of the web wound, etc. However, even when a plurality of touch rolls according to the present invention are pressed onto a web roll, better winding can be achieved by independently controlling the pressing force.

Effects of the Invention The present invention provides the following effects in addition to the effects that conventional touch rolls had.

(1) According to the present invention, web pressure failures caused by bounce of the touch roll due to eccentric winding of the web roll can be eliminated.

(2) If there is any distortion in the wound web,
In the present invention, since there is room for the web to escape between each touch roll, it is possible to remove wrinkles that occur on the web roll even if a material with a large frictional force such as rubber is used as the touch roll. .

(3) The force with which the web roll is pressed by each divided touch roll can be changed independently for each touch roll each night, so there is no difference in the pressing pressure between the central part and the side part in the width direction of the web. It was possible to eliminate wrinkles caused by wrinkles, etc.

(4) In the present invention, since each divided touch roll can move independently, even if the winding of the web roll has unevenness, the entire web roll can be pressed uniformly, and measures against pressure failure can be taken. was completed.

[Brief explanation of the drawing]

Fig. 1 shows a conventional web winding device, and Fig. 2 shows an embodiment of the present invention, in which Fig. 2 (a) is a side view and Fig. 2 (b) is a front view. shows. FIG. 3 shows another embodiment, showing a front view of the main parts. 11... Winding shaft 12... Touch roll 1
3... Dancer shaft 14... Dancer lever 15...
・Cylinder agent Yoshimi Kuwahara

Claims (2)

[Claims] (1) @ A winder that winds a wide long web, and a touch that presses the surface of the web wound on the winder.
1. A web winding device comprising: a web winding device, wherein the touch roll is divided into two or more in the web width direction, and each of the divided touch rolls operates independently. (2) The web winding device according to claim 1, characterized in that the touch rolls each having a divided pattern independently control the pressing force exerted from the surface of the wound web.