JPH08259067A - Web sliding method and its device - Google Patents

Abstract

PURPOSE: To provide a web sliding method and its device which is always stable even in the case where the carrying speed of a web varys at the time of winding or rewinding a thin belt-shaped material such as paper and plastic film or the like. CONSTITUTION: The carrying speed of a web 1 in the case of its winding and rewinding is detected by a web sliding device which is equipped with a sliding motor 9 for moving the web rectangularly to the running direction of the continuously running web 1; a web carrying speed detector 8 for detecting the carrying speed of the web 1; and a controller 10 for controlling the sliding speed given by the sliding motor 9 so as to vary the sliding speed according to the variation of the carrying speed of the web 1. A web sliding device is changed in sliding speed so as to make the term of the sliding speed of the web 1 faster in the case where the detected carrying speed of web 1 becomes faster, and to make the sliding speed of the web 1 slower in the case where the carrying speed of the web 1 becomes slower. Thus this web sliding method executes stable sliding to the variation of the carrying speed of the web 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuously moving web sliding method and device, and more particularly to a winding device and an unwinding device for winding or unwinding a thin strip material such as paper and plastic film. The present invention relates to a method and a device for sliding at right angles to the running direction of a web.

[0002]

2. Description of the Related Art When rewinding a web wound in a roll shape, a method of periodically moving a roll to be unwound (rewinding web) in a direction perpendicular to a traveling direction is a conventional method of winding a web. Has been generally practiced as a means for stabilizing the width direction.

However, the above conventional web sliding device is
Since it slides in the direction perpendicular to the web traveling at a constant cycle regardless of the web transport speed, there is a problem that when the web transport speed becomes slow, the web slides more than necessary and wrinkles are generated on the web. However, when the conveyance speed of the web is increased, the sliding of the web is delayed, and there is a problem that the stabilization in the width direction is insufficient. This tendency is more likely to occur as the thickness of the web becomes thinner, and in particular, it often causes a problem with the paper having a basis weight of 50 g / m ² or less.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and particularly when winding or rewinding a thin strip material such as paper or plastic film, the web conveyance speed is The objective is to provide a sliding method and device that are always stable even when changing.

[0005]

In order to achieve the above object, the present invention has a sliding motor 9 for moving in a direction perpendicular to the running direction of a continuously running web 1, and a web 1.
And a controller for controlling the sliding speed by the sliding motor 9 so that the cycle of the sliding speed also changes in accordance with the change in the conveying speed of the web 1. A sliding device for the web 1 provided with 10 detects the conveying speed at the time of winding or rewinding the web, and when the detected conveying speed of the web 1 is high, the sliding speed of the web 1 is increased. However, when the transport speed of the web 1 becomes slow, the sliding speed of the web 1 is changed so as to be slow, and stable sliding is performed with respect to a change in the transport speed of the web 1. It is a moving method.

[0006]

The relationship between the conveying speed of the web 1 and the sliding speed for stabilizing the quality of the web 1 in the width direction is as follows. When the transport speed of 1 becomes slow, the sliding speed also needs to be slow. Therefore, the present invention makes the sliding speed variable in accordance with the conveyance speed of the web 1 and stably realizes uniform quality without wrinkles in the width direction of the web 1. The present invention is particularly effective for sliding a paper having a basis weight of 50 g / m ² or less.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a web sliding method and apparatus according to the present invention will be described below with reference to the drawings.

Embodiment 1 FIG. 1 is a system configuration diagram showing an embodiment of the present invention. When the rewinding web 3 wound around the rewinding shaft 2 is rewound, the web 1 is wound on the winding shaft 4 while sliding on the rewinding shaft 2 to form the winding web 5. Shows.

In FIG. 1, a conveyance speed detector 8 for the web 1 is arranged on the conveyance motor 7, and a sliding range sensor 6 for limiting the sliding range of the rewinding shaft 2 moves the rewinding shaft 2. It is located on both sides in a position where it can be detected.

The conveyance speed detector 8 for the web 1 is, for example,
It is composed of a pulse generator and outputs a web transport speed signal I ₀ indicating the transport speed of the web 1 to the controller 10.

The sliding range sensor 6 is composed of, for example, a limit switch and is arranged on both sides of the rewinding shaft 2. When the rewinding shaft 2 is moved by a certain amount, the sliding range sensor 6 senses it. Detection signal (sliding range signal I ₁ )
Is output to the controller 10.

The controller 10 decelerates and stops the sliding motor 9 in response to the sliding range signal I ₁ of the sliding range sensor 6 and then reversely rotates the sliding motor 9 so that the sliding side 9 moves at the reverse side with a sliding motion according to the conveyance speed of the web 1. The rewinding shaft 2 is moved until it is detected by the sliding range sensor 6 arranged at. By repeating this operation, the rewinding shaft 2 is periodically moved at a sliding speed corresponding to the conveyance speed of the web 1, so that the rewinding web 3 is also slid in the same manner and is wound by the winding shaft 4. The quality of the wound web 5 in the width direction can be made uniform.

Next, a specific configuration of the controller 10 will be described with reference to a block diagram showing a detailed example of the controller of FIG. The signal conversion circuit 11 outputs the web 1 transport speed signal I ₀ output from the web transport speed detector 8.
Is output to the variable speed device 14. At that time, the signal conversion circuit 11 has a function of converting a digital signal output from the web conveyance speed detector 8 into an analog signal which can be input by the variable speed device 14.

Next, the sliding speed upper / lower limit setting circuit 12 presets the upper limit speed and the lower limit speed of the sliding motor 9 which is controlled according to the web conveying speed. Has a role as a protection circuit.

The deceleration / stop and reverse rotation determination circuit 13 uses the contact signal (sliding range signal I ₁ ) from the sliding sensor 6 to instruct the sliding motor 9 to perform deceleration / stop and forward or reverse rotation. Is output to the variable speed device 14.

With the above device, the output (motor variable speed signal I ₂ ) corresponding to the conveyance speed of the web 1 is output from the variable speed device 14 within the upper and lower speed limits set in the sliding speed upper and lower limit setting circuit 12. When the web 1 is fed to the sliding motor 9 and the conveying speed of the web 1 is increased, the sliding speed is correspondingly increased, and conversely, when the conveying speed of the web 1 is decreased, the sliding speed is also reduced. Then, sliding can be repeated between the sliding range sensors 6 installed on both sides of the rewinding shaft 2, and the quality of the web 1 in the width direction can be made uniform.

As a result of rewinding a paper having a basis weight of 45 g / m ² by using this apparatus, the conveyance speed is a normal 1500 m / m 2.
Effective sliding was possible even when the speed was lowered from min to 100 m / min, while wrinkles were observed at 500 m / min or less when the sliding speed was constant.

[0018]

As described above, according to the web sliding method and apparatus according to the present invention, stable sliding can be always performed without wrinkles regardless of the web conveying speed. The present invention is particularly effective as a sliding method and apparatus for paper having a basis weight of 50 g / m ² or less.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram showing details of the controller shown in FIG.

[Explanation of symbols]

1 Web 2 Rewinding Shaft 3 Rewinding Web 4 Winding Shaft 5 Winding Web 6 Sliding Range Sensor 7 Conveying Motor 8 Conveying Speed Detector 9 Sliding Motor 10 Controller 11 Signal Conversion Circuit 12 Sliding Speed Upper / Lower Limit Setting Circuit 13 Deceleration / stop and reverse rotation determination circuit 14 Variable speed device I ₀ Web transport speed signal I ₁ Sliding range signal I ₂ Motor variable speed signal

Claims (2)

[Claims] 1. A method of sliding a web 1 which is moved in a direction perpendicular to a running direction of the web 1 which is continuously running, detects a conveying speed at the time of winding or unwinding the web 1, and detects the detected web. A method of sliding a web, characterized in that the cycle of the sliding speed of the web 1 is changed according to the change of the carrying speed of No. 1 to perform stable sliding with respect to the change of the carrying speed of the web 1. 2. A sliding motor 9 for moving in a direction perpendicular to the traveling direction of the continuously traveling web 1 and the web 1.
The web transfer speed detector 8 for detecting the transfer speed at the time of winding or rewinding, and the sliding speed by the sliding motor 9 also changes the cycle of the sliding speed according to the change of the transfer speed of the web 1. A web sliding device comprising a controller 10 for controlling the movement of the web.