JPS5851092A - Cutter - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for longitudinally cutting a moving sheet-like elongated object.

Normally, this type of cutting machine only cuts items of the same series, such as paper series and glass series, but the present invention can cut objects such as paper and glass cloth that have high cutting strength with a wing piercing. To provide a low-cost cutting machine that makes it possible to perform cutting with the same machine by adding simple operations, and uses a regular fixed blade without using an expensive rotary blade.

BACKGROUND ART Conventionally, when cutting a long sheet-like object such as paper or glass cloth in the longitudinal direction, a method has been used in which the object is moved to the blade portion of a rotating disc-shaped blade. However, this method requires a rotary blade and a motor to drive it, and maintenance costs are high when you factor in replacement blades and the like. Therefore,
The simplest and cheapest mechanism is to attach a sharp knife-shaped blade such as a commercially available safety knife or sled blade to the fixing jig 1ζ, and press it against the top or bottom of the object to be cut.
Moving the object - a mechanism that cuts the object is often employed. If this mechanism is used, it is easy to cut paper having an appropriate cutting strength (for example, 101 lus thick paper).

However, in the case of objects to be cut, such as glass cloth or nonwoven fabrics, which have cutting strength in the direction perpendicular to the length direction of the fibers, the above mechanism will cause breakage at the cutting surface, and the target cut object will not be cut into a strip. ? I can't be replaced.

Therefore, the present invention is designed to move the object while keeping the cutting blade, the object to be cut, and the soft object in close contact with each other by applying a soft object to the lower surface of the object. With this, the desired strip can be obtained without destroying the cut surface.

The soft object placed underneath must be rotated in order to smoothly move the object.

In addition, it is advantageous for this surface to be soft enough for the cutting blade to bite into it slightly, in terms of adhesion to the object to be cut and prevention of blade wear; however, if it is too soft, the rotating body There is a risk that the surface of the material may be cut and attached to the object to be cut.

From our experimental results, the material has a surface hardness of 50 to 1.
0 pre,,,'.

It has been found that nitrile rubber or urethane rubber with flannel hardness is preferable. Furthermore, since this mechanism is not necessarily necessary for the above-mentioned paper, it is more convenient to have a mechanism that allows the paper to be moved and removed at a location other than the cutting location.

Next, with regard to winding up the cut object, it is difficult to wind it up on the same axis because the object tends to meander during cutting. At this point, the adjacent cut strips are
This problem can be solved by using a winding mechanism.

Examples of the present invention will be described below.

FIGS. 1 and 2 schematically show a cutting machine equipped with the mechanism of the present invention. That is, the cutting section adjusts the contact angle between the knife-shaped fixed blade 4, the fixing jig 2 that attaches it, and the sheet-shaped long object 1 to be cut and the fixed blade 4 in order to make cutting the easiest. It consists of an angle adjustment handle 3. In the case of cutting a material with high cutting strength such as glass cloth, a cylindrical rotating body 5 with a soft surface is attached, and the fixed blade 4 and the long object to be cut l1 and the rotating body S are held in close contact with each other. A mechanism to do this, and a mechanism to do it. The rotating body S rotates freely with the movement of the elongated object 1, or is rotated on its own axis by a drive unit, thereby facilitating the movement of the elongated object 1.

The winding portion of the long object II cut in the longitudinal direction is provided with winding shafts 6, i' with different steps, so that the winding portions of the adjacent long objects l' are provided with different steps. As a result, the positioning of the cutting part and the winding part can be accurately performed SC, meandering of the long object 1' can be prevented, and irregularities at the ends of the winding object can be eliminated.

Table 1 shows the results of cutting various sheet-like elongated objects with or without the rotating body 5 and with changing the material of the rotating body 5. In the conventional method, the rotary blade is broken and cut. Table 1 (2) O: Cutting is easy and a strip-shaped cut product can be obtained.

Δ: Cutting - may cause destruction.

×: The desired strip-shaped cut product cannot be obtained.

As is clear from Table 1, when a rotating body is provided but not rotated, as in Experiment A5, when the object has a high cutting strength, the object breaks at the cutting part and the purpose cannot be smoothly accomplished. There is. Furthermore, differences in the material and surface hardness of the rotating body cause differences in the difficulty of cutting work. For example, if the surface of the rotating body is too hard, the blade, the object to be cut,
The contact surface of the rotating body is small, which causes many disadvantages such as insufficient cutting and severe blade wear (Experiment 4).

On the other hand, if one surface is too flexible, the surface of the rotating body will be destroyed during cutting, and the cutting waste will adhere to the cut edge of the cut object (Experiment Ax). For this reason, the purpose can be smoothly achieved by using synthetic rubber (for example, urethane rubber, nitrile rubber) having a surface hardness of 50 to 70 on the Brinell hardness.

The effects of the present invention are clear from Table 1, and can be summarized as follows: (1) The cutting mechanism is simpler than the conventional method, and the manufacturing cost is low.
A cutting machine with low maintenance costs can be obtained.

(2) A wide range of materials can be cut by attaching a rotating body with a soft surface as a cutting pedestal.

The industrial value of the present invention is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an outline of the mechanism of a cutting machine according to an embodiment of the present invention, and FIG. 2 is a side view 7 of FIG. 1. 1.1' is a long object, 2 is a fixing jig, 4 is a fixed blade, 5 is a rotating body, 6.6' is a winding shaft patent applicant

Claims (1)

[Scope of Claims] 1. A device for thermally cutting a moving sheet-like long object in the longitudinal direction by bringing the blade into contact with the object. Device. 2. The cutting device according to claim 1, wherein the rotating body has a surface hardness of 50 to 70 Brinell hardness. 1. The cutting device according to claim 1 or 2, wherein a winding section for taking up a cut long object is provided so as to be easily removed.