JPH1058389A - Elastic body for extruding punched article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply cut a belt-like body to a suitable length without a cutting tool such as a cutter, a clipper or the like by forming tearing slits extended in the cross direction of the belt-like body at designated spaces in the direction of the belt-like body. SOLUTION: A belt-like body 1 is cut to a designated length and rolled, and the rolled belt-like body 1 is inserted in the inside of a dieing blade 9 fitted to a die board 8. The belt-like body 1 is wound round the outside of the dieing blade 9, and the winding end is fixed by sticking such as a pressure sensitive adhesive tape or the like. At this time, the respective belt-like bodies are fitted in such a manner that the projecting and recessed parts 2 are positioned on the knife edge side of the dieing blade 9. As slits 3 are provided on the belt-like body 1 at required spaces in the longitudinal direction, the belt-like body is pulled in the longitudinal direction or twisted to simply cut the belt-like body along the slits. Accordingly, it is not necessary to use a cutting tool such as a cutter, a clipper or the like in cutting the belt-like body, and the belt-like body 1 with a required length can be simply formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic body for extruding a punched product for preventing a punched product from remaining inside or outside a punching blade for punching a plate-shaped body into a predetermined shape.

[0002]

2. Description of the Related Art In a punching apparatus for punching a relatively hard plate-like body such as a plywood into a predetermined shape using a die board having a punching blade attached thereto and an anvil receiving the cutting edge of the punching blade, an inner side of the punching blade is used. An elastic body is attached to the outside and the outside, and the punched product is pushed out from the inside and outside of the punching blade by using the elastic force of the elastic body.

The elastic body shown in FIG. 5 has been conventionally known. This elastic body has irregularities 11 along one side edge of a band 10 made of an elastic material such as urethane rubber.
Is formed.

[0004] The above-mentioned elastic body is formed by inserting the other side edge into a groove formed along the punching blade of the die board, or by rounding it to an appropriate size, or folding it in a zigzag shape so that it is inside and outside the punching blade. It is a mounting to be arranged. If punching work is performed after such mounting,
The elastic body is deformed, and the punched product is extruded by the restored elasticity due to the deformation.

[0005]

By the way, in the above-mentioned elastic body, since the belt-like body 10 is made of an elastic material having a high tear strength such as urethane rubber, a cutter or scissors is required when cutting to an appropriate length. I do. Here, since a large number of elastic bodies need to be attached to one die board,
A cutting tool must be used for each installation, and there is still a point to be improved in improving the mounting workability.

An object of the present invention is to provide an elastic body for extruding a punched product which can be easily cut into an appropriate length without using a cutting tool such as a cutter or scissors.

[0007]

According to the present invention, there is provided an elastic body for extruding a punched product comprising an elastic band having a high tear strength, the tear extending in the width direction of the band. In this configuration, the notches are formed at predetermined intervals in the length direction of the band.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, the strip 1 is made of an elastic material having a high tear strength such as urethane rubber, and has irregularities 2 along one side edge of the strip 1. Here, the unevenness 2 may be one as shown in FIG. 2, one in which triangular peaks and valleys are alternately continuous, or one as shown in FIG. 5.

The strip 1 is provided with tearing cuts 3 extending in the width direction of the strip 1 at predetermined intervals in the length direction of the strip 1. The cut 3 in the embodiment extends discontinuously from each of the two side edges of the strip 1 toward the opposite side edge, and the joint 4 remains between the opposed portions of the cut 3.

Instead of the above-described cut 3, a linear cut whose depth is slightly smaller than the thickness of the band 1 may be formed on both side edges of the elastic band 1.

If the gap between the cuts 3 is large, an elastic body having a required length cannot be formed by cutting from the cut 3, so that the above-mentioned space is preferably about 3 to 8 mm.

FIGS. 3 (I) and (II) show an example of a method of forming the elastic body A having the above structure. FIG. 3 (I) shows a sheet 5 made of urethane rubber and a wavy cutting line 6 and a straight line. Cut lines 7 are formed alternately, and cut lines 3 are formed at predetermined intervals in the longitudinal direction of the cut lines 6, 7 so as to intersect the cut lines 6, 7 and to be linearly arranged. doing.

Here, since the sheet 5 made of urethane rubber has an affinity, when the cutting lines 6, 7 and the cuts 3 are formed, the cut surfaces of the cutting lines 6, 7 and the cuts 3 are mutually formed due to the affinity. The sheet 5 is adhered and is not separated from the cutting lines 6 and 7 and maintains the shape of the sheet 5.

Then, the elastic body A shown in FIG. 1 can be obtained by tearing along the cutting lines 6 and 7.

FIG. 4 shows an example of the use of the elastic body having the above configuration. In this example, the band 1 shown in FIG. 1 is cut to a predetermined length and rounded, and the round band 1 is inserted into a punching blade 9 attached to a die board 8. Further, the belt-like body 1 is wound around the outside of the punching blade 9, and the end of the winding is fixed by attaching an adhesive tape or the like. At this time, each of the strips 1 is mounted such that the unevenness 2 is located on the cutting edge side of the punching blade 9.

Here, since the slits 3 are provided at predetermined intervals in the length direction of the strip 1, the strip 1 is pulled in the length direction or twisted as shown in FIG. It can be easily cut along the cut 3. For this reason, there is no need to use a cutting tool such as a cutter or scissors for cutting the strip 1, and the strip 1 having a required length can be easily formed.

When the plate 1 is punched by the punching blade 9 in a state where the strip 1 is mounted as shown in FIG. 4, the strip 1 is elastically deformed at the time of punching, and the punched product is pushed out by its resilient elasticity. It is.

In general, when punching a relatively hard plate-like body, the band-like body 1 having a width dimension protruding from the cutting edge of the punching blade 9 in an attached state is used. Here, since the punching blades 9 have different heights according to the thickness of the plate-like body to be punched, several types of strips 1 having different widths according to the height of the punching blades 9 are prepared. deep. When the unevenness 2 is formed along one side edge of the strip 1 as in the embodiment, the unevenness 2 is easily elastically deformed, so that the unevenness 2 is adapted to several kinds of punching blades 9 having different heights. And the number of strips 1 to be prepared can be reduced.

[0020]

As described above, in the present invention, since the notches extending in the width direction of the elastic band are formed at a required interval in the length direction of the band, the band is used with a cutter or scissors. It can be cut easily along the cut without any. Therefore, an elastic body having a required length can be easily obtained, and the workability of attaching the elastic body to the die board can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of an elastic body according to the present invention.

FIG. 2 is a perspective view showing a tearing state of the elastic body.

FIG. 3 (I) is a front view showing an example of a method for forming the elastic body, and FIG. 3 (II) is a perspective view showing the same.

FIG. 4 is a sectional view showing an example of the use of the above elastic body.

FIG. 5 is a front view showing a part of a conventional elastic body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Strip 2 Irregularity 3 Cut

Claims (1)

[Claims] 1. An elastic body for extruding a punched product comprising an elastic band having high tear strength, wherein tear cuts extending in a width direction of the band are formed at predetermined intervals in a length direction of the band. An elastic body for extruding a punched product, characterized in that: