JPH0542498A - Sheet perforating method and device - Google Patents

Abstract

PURPOSE:To provide a sheet-perforating method and device in which manufacturing trouble due to a large tension applied to a sheet being conveyed is not caused and also the perforation edges are hardly damaged. CONSTITUTION:A sheet-perforating device is made up of a perforating device C and a sheet-conveying device B by which a sheet is continuously conveyed to the perforating device C. The perforating device C is made up of a perforation roll 3 on the circumferential surface of which perforation edges 31 are planted so as to be oblique to the direction of the roll shaft, and a seat roll 4 which receives the perforation edges 31 of the perforation roll 3. A sheet A is successively perforated by the perforation edges 31 of the perforation roll 3, and a perforation D is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for punching perforations in the width direction of sheets at a predetermined interval.

[0002]

2. Description of the Related Art Conventionally, as a method of perforating perforations in the width direction at predetermined intervals in sheets, as shown in FIG. 2, sheets a are perforated with a perforation blade b axially aligned with the circumferential surface. _{When a} large number of _1's are transferred between the perforated roll b and the pedestal roll c, which are planted side by side, and the sheet a comes on the pedestal roll c, the perforation blade b ₁ of the perforated roll b is simultaneously moved to the sheet a. The perforation d is perforated by penetrating.

[0003]

In the above method, since all the perforation blades of the perforating roll penetrate the sheets at the same time, the tension of the sheets greatly changes. For this reason, troubles are likely to occur in the transfer of sheets and the like. Also,
Since all of the perforation blades penetrate the sheets at the same time and come into contact with the pedestal roll, there is a problem that the blades tend to be painful.

In view of the above points, the present invention provides a perforating method and apparatus which do not cause manufacturing troubles due to a large change in tension of the sheets to be transferred and have less perforation blade damage. The purpose is to

[0005]

A method of punching perforations in sheets according to the present invention is a method for punching a perforation roll between a pedestal roll and a perforation roll in which perforations are planted obliquely with respect to the roll axis direction. It is characterized in that perforations in the width direction are perforated in the sheets by transferring the sheets.

Further, the apparatus of the present invention comprises a punching device and a sheet transporting device for continuously transporting sheets to the punching device. The punching device is slanted on the roll peripheral surface with respect to the roll axial direction. A perforation roll having a perforation blade planted therein and a pedestal roll for receiving the perforation blade of the perforation roll, wherein the sheets are conveyed in a direction perpendicular to the roll axial direction of the perforation roll. The feature is that it can be tilted.

This method and apparatus achieve the above object. The perforation blades to be planted on the peripheral surface of the piercing roll are not particularly different from the conventional ones,
As described above, it is to be inclined with respect to the roll axial direction, the oblique angle is appropriately determined by the peripheral speed of the perforating roll, the transfer speed of the sheets, etc.,
It is preferably inclined in a spiral shape so as to be a straight line when unfolded.

In the present invention, the sheets to be perforated are not particularly limited, and include papers such as kraft paper, plastic films or sheets, or laminates of two or more of these, Alternatively, a laminated body such as an adhesive sheet obtained by applying an adhesive to these papers, films and sheets may be mentioned.

[0009]

In the method and apparatus of the present invention, since the sheets are perforated by the perforating roll in which the perforation blade is planted obliquely with respect to the axial direction of the roll, a large number of perforations are formed. The blade does not penetrate the sheets at the same time to come into contact with the pedestal roll, and sequentially penetrates the sheets to come into contact with the pedestal roll, so that the perforation blade is less damaged, and the sheets are punched at the time of punching. Does not increase the tension.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The method and apparatus of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the outline of the invented apparatus, where A is sheets, B is a sheet transfer device, and C is a punching device.

The sheet transfer device B is composed of a pair of transfer rolls 1 and 1. Although not shown, the transfer rolls 1 and 1 can be moved forward and backward in the axial direction thereof, and the sheet for the punching device C can be moved. The supply angle of class A can be adjusted.

In the punching device C, a plurality of needle-like perforated blades 31 are planted on the outer peripheral surface at predetermined intervals, and the rotating punching roll 3 and the sheets A to be punched with the punching roll 3 are formed.
And a pedestal roll 4 that rotates in synchronization with the perforating roll 3.
The perforation blade 3 provided on the outer peripheral surface of the perforating roll 3
1 is planted obliquely in a spiral shape in the roll axis direction.

The sheets A are unwound from the roll 2 by the transfer roll 1 and continuously fed to the punching device C.
In this punching device C, the perforation blade 3 of the punching roll 3
Since 1 is not planted along the roll axis direction as described above, all of them do not hit the sheets A at the same time and penetrate, and the sheets A are sequentially penetrated. Perforations D are formed in the width direction at intervals.

The sheets A on which the perforations D are formed in this manner are wound up by a winding device (not shown).

[0015]

As described above, according to the present invention, a large number of perforated blades do not penetrate the sheets at the same time and come into contact with the pedestal roll, and sequentially penetrate the sheets to form the pedestal roll. Since they are in contact with each other, the perforation blade is less damaged, and the tension of the sheets is not increased during perforation.

Further, the perforations are perforated in the sheets on a straight line perpendicular to the longitudinal direction by synchronizing the sheet conveying direction of the sheet conveying device with the inclination direction of the perforations of the perforating roll. .

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an embodiment of a conventional method.

[Explanation of symbols]

 A sheets B sheet transfer device C punching device D perforation 1 transfer roll 3 perforation roll 31 perforation blade 4 pedestal roll

Claims (2)

[Claims] 1. A perforation line in the width direction is formed on a sheet by transferring the sheet line between a pedestal roll and a perforation roll having perforation blades slantingly formed on the peripheral surface with respect to the roll axis direction. A method for punching perforations in sheets, which is characterized by punching. 2. A punching device and a sheet transporting device for continuously transporting sheets to the punching device, wherein the punching device is provided with perforated blades obliquely to the roll axial direction on the roll peripheral surface. And a pedestal roll that receives the perforation blades of the piercing roll, and the sheet conveying direction of the sheet conveying device is tiltable with respect to the direction perpendicular to the roll axial direction of the piercing roll. A perforation device for perforations.