JPH1179485A - Sheet winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper roll higher in safety and sanitary by performing the fixing of a winding start end part to a core at vacuum pressure when a sheet material such as paper towel is wound on a roll. SOLUTION: A sheet winding device is structured so that a sheet winding start end part is fixed by a vacuum pressure to the outer peripheral part of a core 5. Also a vent hole 2a passing a vacuum pressure to the inside of a winding shaft 2 to which a core 5 is inserted fixedly, and the opening part of its branch hole provides a sucking force to a communicating hole 5a in the core 5 through a lateral groove part 2b formed so that it surrounds the periphery of a mounting shaft. Because it can be fixed to the periphery of the core without using any adhesive agent and adhesive tape which are suspected to be harmful, a sheet available for a wide range of application such as for food packaging materials and sanitary goods can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet winding device for winding a sheet, such as a paper towel, wound around a large roll onto a smaller roll.

[0002]

2. Description of the Related Art Normally, thin sheet materials such as soft paper and polyethylene are firstly wound on a large roll, secondarily wound on a small roll, and shipped as they are. It is used for the following purposes. As described above, when the sheet material is wound on a small roll, the winding start end is joined to a core material (paper tube) with a glue or an adhesive tape while rotating the winding shaft. Winding up.

[0003]

As described above, when glue or adhesive tape is used at the winding start end, if the sheet is used for kitchen towels or food packaging materials, there is a problem in hygiene and safety. Comes out. Therefore, when winding a sheet material for such an application, it is desired to employ a safe and harmless means for fixing the winding start end.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sheet winding device capable of winding without causing such a safety problem.

[0005]

In order to achieve the above object, a sheet winding device according to the present invention is arranged such that a winding start end of a sheet to be wound by utilizing vacuum pressure is fixed to a roll core. The paper tube is sucked and fixed, and the paper tube can be wound up by rotating the paper tube through a winding shaft.

Specifically, a ventilation hole is provided inside a rotatable winding shaft, the opening of the ventilation hole is provided in a lateral groove on the outer periphery, and a paper tube inserted into the winding shaft is provided. Also, at least one communication hole is provided to communicate with the outside. Using the vacuum pressure supplied to the communication hole through the ventilation hole, the winding start end of the sheet is fixed to the outer circumference of the paper tube, and the sheet is wound into a roll by rotating the winding shaft. is there.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a base of a winding shaft 2 is fixed to a tip of a main shaft 1. The main shaft 1 is rotatably attached to a device main body (not shown) via bearings 3 and 3. The main shaft is rotatable by a transmission wheel 4 that is rotated by a transmission device such as a belt, a chain, or a gear.

A paper tube 5 serving as a core of a sheet roll (paper roll) to be wound is inserted through the winding shaft 2.
Although the diameter of the paper tube 5 is determined by a standard, the outer diameter of the winding shaft 2 is set to a size that can be loosely fitted thereto.

Inside the winding shaft 2, there is provided a ventilation hole 2a extending from the vicinity of the base end to the center, and passing therethrough to the vicinity of the front end through the central shaft. The ventilation hole 2a is branched at three places and communicates with a lateral groove 2b provided on the outer peripheral portion. The paper tube 5 is provided with a communication hole 5a at a position corresponding to the lateral groove 2b for communicating with an external space. Therefore, each of these holes communicates from the entrance near the base of the winding shaft 2 to the communication hole 5a via the ventilation hole 2a.

Around the portion of the wind-up shaft 2 at the vent hole entrance,
An introduction groove 2c is provided, and the periphery thereof is covered by a fluid coupling 7 capable of maintaining airtightness between the introduction groove and the external space. The fluid can be supplied through the introduction groove 2c even if the position of the vent hole inlet changes due to the rotation of the winding shaft 2.

A hose 8 is connected to the fluid coupling 6 via a fluid joint 7. The hose 8 is connected to a vacuum pump 10 via a solenoid valve 9. Therefore, the solenoid valve 9
Is opened, the communication hole 5a of the paper tube enters the suction state via the ventilation hole 2a even when the winding shaft 2 is kept rotating.

When the communication hole 5a is in the suction state,
When the winding start end of the sheet 11 approaches the outer peripheral portion of the paper tube 5, this is sucked by the communication hole to start winding the sheet. When the take-up shaft 2 continues to rotate, the sheet is wound up to a predetermined length to form a sheet roll, and the solenoid valve 9 is closed when the sheet rolls. Thus, the vacuum state of the communication hole 5a is released, and the sheet roll is pulled out from the winding shaft together with the paper tube. The next paper tube is inserted into the take-up shaft after being taken out, and the next sheet is taken up again by the same process.

In order to make the winding shaft 2 and the paper tube 5 integrally rotatable, a means for increasing the friction by filling the gap between the two is necessary. Means utilizing the deformation of the bellows due to the introduction of the compressed air or the electromagnetic clutch.

The present invention is applicable not only to embossed paper such as paper towels but also to winding of wrap sheets for food packaging and various kinds of fabrics.

[0015]

According to the present invention, as a means for fixing the winding start end of a sheet such as a paper towel to a paper tube, suction and fixing by vacuum pressure without using a harmful adhesive or adhesive tape. Therefore, it is possible to quickly wind up a sheet for a wide range of uses such as food packaging and sanitary goods.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of a main part of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 2 Winding shaft 2a Vent hole 2b Horizontal groove 5 Paper tube 5a Communication hole 11 Sheet

Claims (1)

[Claims] 1. A paper tube is inserted through a rotatable winding shaft, a winding start end of a sheet to be wound is attached to an outer peripheral portion of the paper tube, and the winding shaft is rotated. A sheet winding device for winding the sheet into a roll with a paper tube as a core, wherein a ventilation hole connectable to a vacuum pump is provided inside the winding shaft, and the ventilation hole is provided on an outer peripheral portion thereof. The paper tube is provided with a communication hole communicating with the outside of the paper tube at least at one place, and the sheet starts winding of the sheet. In this case, the winding start end portion can be attracted to the outer peripheral portion of the paper tube by vacuum pressure.