JPH08300292A - Running cutter - Google Patents

Abstract

PURPOSE: To provide a running cutter that is able to stably cut a film regardless of any synchronous conditions lying between a running speed of the cutter and a conveying speed of the film, in this running cutter in use of cutting the film during conveyance. CONSTITUTION: This is a running cutter whose one side blade 1 is vertically projected from one surface side to the other side of a film 11 during conveyance and running in a direction to be orthogonal with the conveying direction of the film, and in this constitution, the one side blade is constituted to be turnable on a virtual plane in parallel with the film and a cutting edge part of this one side blade is set up in a spot nearby the turning center. The running of this one side blade 1 is performable in use of a belt 4 wrapped on both symmetrical rolls 5 and 5, by way of example. In this connection, the one side blade 1 is rotatable in use of a ball bearing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling cutter, and more particularly to a traveling cutter used for cutting a film during transportation.

[0002]

2. Description of the Related Art In the process of manufacturing a thermoplastic resin film, a single-sided blade projects vertically from one side of the film being conveyed to the other side thereof in order to cut the film being conveyed, and is orthogonal to the conveying direction of the film. A traveling cutter that travels in the desired direction is used. Cutting with such a traveling cutter,
The traveling speed of the cutter and the conveying speed of the film are synchronized with each other, and the film being conveyed is cut obliquely with respect to the conveying direction by the blade edge portion of the single-sided blade.

[0003]

However, in the conventional traveling cutter, the single-sided blade is fixed, and therefore, when the traveling speed of the cutter and the conveying speed of the film are not synchronized, the film is not cut during cutting. There is a problem of breaking. The present invention has been made in view of the above circumstances, and an object thereof is a traveling cutter used for cutting a film during conveyance, which is irrelevant to a synchronization condition between the traveling speed of the cutter and the conveyance speed of the film. Another object of the present invention is to provide a traveling cutter capable of stably cutting a film.

[0004]

That is, the gist of the present invention is a traveling cutter in which a single-sided blade projects vertically from one side of a film being conveyed to the other side and travels in a direction orthogonal to the film conveying direction. In addition, the traveling cutter is characterized in that the one-sided blade is configured to be rotatable on an imaginary plane parallel to the film, and the blade tip portion of the one-sided blade is arranged at a position close to the center of rotation.

[0005]

The single-sided blade, which is configured to be swivelable and whose blade edge portion is disposed near the center of swiveling, automatically receives the resistance from the film in the direction in which the traveling speed of the cutter and the conveying speed of the film are combined. Aim the cutting edge.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an explanatory plan view showing an example of a traveling cutter of the present invention in a film cut state, FIG. 2 is a side explanatory view showing the traveling cutter shown in FIG. 1 in a film cut state, and FIG.
[Fig. 3] is a side view showing a main part of the traveling cutter shown in Fig. 2.

The traveling cutter of the present invention is similar to the conventional traveling cutter in that the single-sided blade (1) is feeding the film (1
1) It projects vertically from one surface side to the other surface side and runs in a direction orthogonal to the film transport direction.

The illustrated traveling cutter is, as shown in FIGS. 1 and 2, arranged on the lower surface side of the film (11) being conveyed, in the direction orthogonal to the conveying direction of the film, and in the longitudinal direction thereof. A guide box (3) having a running groove (2), and rotating rolls (5), (5) arranged at both ends inside the guide box (3) and wound with a belt (4), A drive motor (not shown) connected to the rotating roll enables the above-mentioned movement of the single-sided blade (1).

That is, the single-sided blade (1) vertically protruding from one surface side to the other surface side of the film (11) being conveyed is connected to the belt (4) and runs in a direction orthogonal to the film conveying direction. . However, the above-mentioned movement of the single-sided blade (1) is not limited to the illustrated example, and for example, a method of fixing the single-sided blade to the drive shaft of a reciprocating mechanism such as an air cylinder, a rail on the lower surface side of the film being conveyed, It can also be performed by arranging a carriage moving on the carriage and mounting a single-sided blade on the carriage.

A feature of the traveling cutter of the present invention is that the single-sided blade (1) is configured to be rotatable on a virtual plane parallel to the film (11) being transported, and the blade tip portion of the single-sided blade is close to the center of rotation. It is located at the point. As shown in FIG. 2, the illustrated traveling cutter has a fixed shaft (6) provided upright on the belt (4) and a ball bearing (7) arranged on the tip side thereof, and the outer ring of the ball bearing is A single-sided blade fixing base (8) is provided so that the single-sided blade fixing base (8) can be turned on a virtual plane parallel to the film (11) being conveyed, and the single-sided blade (1) is erected on the single-sided blade fixing base (8). This allows the single-sided blade (1) to swivel as described above. Then, the single-sided blade (1) is erected on the single-sided blade fixing base (8) so that the inclined blade tip portion is arranged at a position near the turning center.

The base end side of the fixed shaft (6) has an upper slide member (9) and a lower slide member (1) located above and below the cutter running groove (2) of the guide box (3).
0) and the lower slide member (10) is fixed to the belt (4). Therefore, the fixed shaft (6) can stably run in the cutter running groove (2) of the guide box (3) by the belt (4).

The cutting of the film (11) during transportation by the traveling cutter of the present invention is performed as shown in FIG. That is, as in the case of the conventional traveling cutter, the film (11) being conveyed is cut by the blade edge portion of the single-sided blade in an oblique direction with respect to the conveying direction.

However, in the case of the traveling cutter of the present invention in which the single-sided blade (1) can be rotated on a virtual plane parallel to the film, the rotation of the single-sided blade (1) is restricted only by the resistance from the film. To be done. Moreover, in the case of the traveling cutter of the present invention, since the blade tip portion of the single-sided blade (1) is arranged at a position close to the turning center, the blade tip portion of the single-sided blade (1) automatically receives the resistance from the film. In the direction of the composite of the traveling speed of the cutter and the conveying speed of the film.

Therefore, the traveling cutter of the present invention travels in the direction orthogonal to the film conveying direction with the blade edge always directed to the direction having the least resistance regardless of the synchronization condition between the traveling speed of the cutter and the conveying speed of the film. And stable cutting can be performed.

[0015]

According to the traveling cutter of the present invention described above, the film can be stably cut regardless of the synchronization condition between the traveling speed of the cutter and the conveying speed of the film. As a result, it is possible to prevent breakage during film cutting and improve the productivity of the film, and also to prevent damage to the cutting edge portion and damage to the traveling cutter due to cutting resistance.

[Brief description of drawings]

FIG. 1 is an explanatory plan view showing an example of a traveling cutter of the present invention in a film cut state.

FIG. 2 is a side view showing the traveling cutter shown in FIG. 1 in a film cut state.

FIG. 3 is a side view showing a main part of the traveling cutter shown in FIG.

[Explanation of symbols]

 1: Single-sided blade 2: Cutter running groove 3: Guide box 4: Belt 5: Rotating roll 6: Fixed shaft 7: Ball bearing 8: Single-sided blade fixing base 9: Upper slide member 10: Lower slide member 11: Film being conveyed

Claims (1)

[Claims] 1. A traveling cutter in which a single-sided blade vertically protrudes from one side of a film being conveyed to the other side and travels in a direction orthogonal to a conveying direction of the film, wherein the one-sided blade is parallel to the film. A traveling cutter which is configured to be rotatable on a plane and in which a blade edge portion of a single-sided blade is arranged at a position close to a center of rotation.