JPS6219400A - Device for perforating perforation, etc. to tape - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Application of the Invention The present invention relates to an apparatus for perforating or cutting a strip of paper at regular intervals.

<Prior Art> For example, there is an apparatus that makes perforations or the like at regular intervals on a strip of paper such as toilet paper.

By the way, when perforations are carved using conventional equipment, the distance e from one perforation (L+ in Figure 2) to the next perforation (L2) on the finished product is determined at the time the equipment is ordered. This is the setting.

However, for example, when handling paper of different quality, or when handling items with different structures such as single sheets and double sheets, it becomes necessary to change the perforation interval e.

However, in conventional devices, the pitch between perforations is already fixed for each device, and therefore cannot meet such user demands.

OBJECT OF THE INVENTION The present invention has been made to improve the above-mentioned points, and it is possible to freely adjust the perforation positions and the intervals between the cutting positions according to the requirements of the user of the device. The purpose is to provide a device that can

Structure of this proposal Kui〉Cutter The cutter is composed of a rotating blade 1 and a fixed blade 2.

The cutter is a blade for cutting the tape T or making perforations without cutting it.

The rotary blade 1 is arranged in a spiral shape on the side of the rotating roll 11.
It is constructed by attaching two spiral blades 12.

Particularly in the present invention, the rotational speed of the rotary blade 1 is configured to be adjustable by a known continuously variable transmission or the like.

A fixed blade 2 is located close to the rotary blade 1.

The fixed blade 2 is mounted on the side of the fixed base 11 that does not rotate.
It is constructed by attaching one straight blade 22 parallel to the central axis of the blade.

In addition, the fixed blade 2 is attached to the arm 23, fixed via a pin at the rotation center of the arm 23, and the distance between the fixed blade 2 and the rotary blade 1 can be adjusted by rotating the arm 23 with the jack 24. Configure it like this.

Exit> Pull-out roller A roller that pulls out the tape T wound around the base paper roll 3 is the pull-out roller 4.

The pull-out roller 4 has a configuration in which two rollers are brought into contact with each other and rotated in opposite directions by the force of a driving source.

The base paper roll 3 is positioned on the opposite side of the pull-out roller 4 with respect to the cutter.

As a result, the tape T is pulled out from the base paper roll 3 by the driving force of the pull-out roller 4 and passes between the cutters.

(kuha) Auxiliary rollers One auxiliary roller 5.6 is arranged on each side of the rotary blade 1.

The angle at which the tape T wraps around the rotary blade 1, that is, the distance that the tape T and the rotary blade 1 are in contact with each other, is determined by the relationship between the distance between each auxiliary roller 5.6 and the rotary blade 1 and its arrangement position. .

<2> Relationship of rotational speed The rotation speed of the pull-out roller 4 is constant.

Therefore, the moving speed of the tape T pulled out by the pull-out roller 4 is constant.

On the other hand, the speed at which the rotary blade 1 rotates can be adjusted as described above.

Therefore, for a tape T that is fed at a constant speed, the tape rotates in one of the following conditions: ■ It rotates faster than that speed, ■ It rotates at a speed equal to the tape T speed, or ■ It rotates slower than the tape T speed. The blade 1 will come into contact with the tape T.

kuho〉Relationship between tape speed and pitch From the relationship between the feeding speed of the tape T and the rotational speed of the rotary blade, the interval between perforations carved on the tape T changes as follows.

In this way, even if the tape feed speed V is constant, the pitch of the perforations carved by the rotary blade on the tape can be freely adjusted by changing the speed of the rotary blade.

Since the surface speed of the rotating roll 11 and the running speed of the paper are different, a slip naturally occurs between the rotating roll 11 and the running paper, creating a frictional force.

When this frictional force becomes greater than the tensile strength of the paper, the paper is cut and cannot be rewound.

Naturally, this frictional force is related to the angle δ between the rotating roll 11 and the paper.

As a result of various experiments, the inventor has found that when the holding angle is 30'' or less, the paper does not cut and the interval between perforations can be adjusted almost freely, but when the holding angle is 40' or more, the paper is cut. I found it to be impractical as it would tear apart.

<Example> The positional relationship between the roller 11 of the rotary blade and the auxiliary rollers 5 and 6 is as shown in the figure, and the position of the auxiliary roller 5 is changed to change the holding angle δ.

The wrap angle δ is calculated using the following formula.

The results were as follows.

Effects of the present invention> As described above, the present invention changes the interval between perforations etc. carved on the tape by simply changing the rotational speed of the rotary blade while keeping the tape feeding speed constant. It is.

Therefore, the rotational speed of the rotary blade can be adjusted depending on the quality, application, and structure of the tape, and the perforation pitch can be freely selected.

[Brief explanation of drawings]

Figure 1: Illustration of the arrangement of two rollers and rotating blades Figure 2: Illustration of perforations in the tape Figure 3: Illustration of the arrangement of rollers in the embodiment 1: Rotary blade
2: Fixed blade 3: Base paper roll 4: Pull-out roller

Claims (1)

[Claims] In a device that draws out a tape from a roll and makes perforations by using the driving force of a draw-out roller, the tape is drawn out at a constant speed by the draw-out roller, and the cutter rotates to form the perforations. A device for carving perforations, etc. on tape, characterized in that the speed is adjustable, and the angle between the tape and the roll rotated by the cutter is set to 30° or less.