JP2561496Y2 - Crushed piece - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushed piece used for fixing eyelets to a cloth.

[0002]

2. Description of the Related Art Conventionally, a crushing piece is composed of an upper die, which is covered with an eyelet holding cylinder which retreats against an upper spring, and an upper die in which a urethane cloth-clamping cylindrical ring is fitted, and a lower spring. bear the seat plate holding cylinder descending against
And a lower die in which an urethane circular lower die cover larger than the outer diameter of the dough-clamping cylindrical ring is fitted into the opening of the lower-die main body in a case. With the dough pinched on the upper surface of the lower die cover by pressing the ring, the upper die is hit mainly, and the eyelet holding cylinder held by the eyelet holding cylinder is used.
And deforming the lower die together pass through the raw land,
The eyelet main body and the seat plate are connected by sandwiching the cloth.

[0003]

SUMMARY OF THE INVENTION The above-configured crushed piece of cloth sandwiching cylindrical ring and lower die cover,
It is to prevent wrinkles from being formed in the cloth sandwiched between the eyelet main body and the seat plate by caulking and fixing, but the upper die and the lower die There is a problem to be solved in that the required clamping dimensions cannot be secured in the clamping portion of the die, so that the eyelet main body and the seat plate cannot be securely clamped and fixed.

According to the present invention, even when the fabric is sandwiched by the fabric-clamping tubular ring and the lower die cover, the required crimping dimensions can be ensured at the caulking portion of the upper die and the lower die, and the eyelet main body and the seat plate are secured. It is an object of the present invention to provide a crushed piece that can be securely caulked and fixed.

[0005]

According to the present invention, a synthetic resin cloth clamping cylindrical ring having excellent elasticity is fitted to an upper die mainly covered with an eyelet holding cylinder which retreats against an upper spring. The upper die and the lower die main body covered with a seat plate holding cylinder that descends against the lower spring are housed in a case, and the opening thereof has excellent elasticity larger than the outer diameter of the cloth-clamping cylindrical ring. The lower die is fitted with a circular lower die cover made of synthetic resin, and the upper die is mainly hit while the cloth is pinched on the upper surface of the lower die cover by pressing the cloth pinching cylindrical ring. the caulking tube eyelet held by the holding tube, with pass through the raw fabric is deformed by the lower die, in a crushed piece which is adapted to couple across the fabric eyelet and seat plate, the fabric clamping of the upper die Cylindrical ring A single or a plurality of narrow grooves are formed on the surface of the circular lower die cover of the lower die to be in contact with the surface so that the surface is compressed and deformed within the elastic limit by the pressing of a cloth-clamping cylindrical ring. The crushed piece is a gist.

[0007]

As described above, the surface of the circular lower die cover of the lower die to which the cloth holding cylindrical ring of the upper die abuts is compressed or deformed by the pressing of the cloth holding cylindrical ring. When the dough sandwiching cylindrical ring is pressed, the upper surface of the lower die cover is compressed and deformed within the elastic limit, and the crimping dimensions required for the crimping parts of the upper die and the lower die are formed. Can be secured.

[0008]

FIG. 1 is a sectional view, FIG. 2 is a plan view of a lower die, and FIG. 3 is a cross-sectional view showing a deformed state of a lower die cover. The upper die 1 is composed of an upper die 1 and a lower die 2, and the upper die 1 is made of a urethane-made main body 5 covered with an eyelet holding tube 4 that retreats against the upper spring 3, as in the conventional case. The lower die 2 accommodates a lower die main body 9 covered with a seat plate holding cylinder 8 which descends against a lower spring 7 in a case 10. A urethane circular lower die cover 11 larger than the outer diameter of the cloth-clamping cylindrical ring 6 is fitted into the opening, and two narrow grooves 12 are formed on the surface of the circular lower die cover 11. The maximum diameter is outside the cloth-clamping cylindrical ring 6. It is engraved as equal to or slightly smaller diameter when.

As shown in FIG. 1, the crushed piece constructed as described above has an upper die 1 in which an eyelet main body is held in an eyelet holding tube 4 with a caulking tube (not shown) facing downward, and a seat plate holding member. The cloth C is arranged between the lower dies 2 holding a seat plate (not shown) in the cylinder 8 and the upper dies 1 are lowered to strike the upper dies 1 to resist the upper and lower springs 3 and 7. Then, the eyelet holding tube 4 and the seat plate holding tube 8 retreat and descend, and the lower die cover 11
The narrow groove 12 on the upper surface is compressed and deformed within the elastic limit, so that the contact surface is reduced by the amount of deformation t, and the crimping dimensions required for the crimping portions of the upper die 1 and the lower die 2 are secured, and the eyelet holding cylinder 4
The crimping cylinder mainly composed of the eyelets can be penetrated through the cloth C and deformed by the lower die, so that the eyelet main body and the seat plate can be completely crimped with the cloth C interposed therebetween.

In the above description, urethane is used as the material of the cloth-clamping tubular ring 6 and the circular lower die cover 11. However, any synthetic resin having the same elasticity as this may be used, and is limited to urethane. is not.

[0011]

As described above, the crushed piece button of the present invention is provided on the surface of the circular lower die cover of the lower die to which the cloth holding cylindrical ring of the upper die is abutted. Since a single or a plurality of narrow grooves that are compressed and deformed within the elastic limit by pressing the shaped ring are formed, the upper surface of the lower die cover is compressed and deformed within the elastic limit when the fabric-clamping cylindrical ring is pressed. In addition, the required crimping dimensions are secured in the crimped portions of the upper die and the lower die, and there is an effect that the eyelet main body and the seat plate can be securely crimped and fixed to the cloth.

[Brief description of the drawings]

FIG. 1 is a sectional view of a crushing piece according to an embodiment of the present invention.

FIG. 2 is a plan view of a lower die forming a crushed piece.

FIG. 3 is a sectional view showing a deformed state of a lower die cover of a lower die constituting a crushed piece.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Upper die 2 Lower die 3 Upper spring 4 Eyelet holding cylinder 5 Upper die main body 6 Fabric holding cylindrical ring 7 Lower spring 8 Seat plate holding cylinder 9 Lower die main body 10 Case 11 Circular lower die cover 12 Narrow groove C Fabric t deformation amount

Claims (1)

(57) [Scope of request for utility model registration] 1. An upper die in which an eyelet holding cylinder which retreats against an upper spring is covered with an upper die main body, and a synthetic resin cloth sandwiching cylindrical ring having excellent elasticity is fitted to the upper die. A lower die main body covered with a seat plate holding cylinder that descends in opposition is accommodated in a case, and a circular lower die cover made of synthetic resin having an elasticity larger than the outer diameter of the cloth-clamping cylindrical ring in an opening thereof is provided. A lower die is fitted to the lower die cover by pressing the dough pinching cylindrical ring. Caulking cylinder ,
Together pass through the raw land is deformed in the lower die, in a crushed piece which is adapted to couple across the fabric eyelet and seat plate, a circular of the lower die fabric clamping cylindrical ring of the upper die comes into contact On the surface of the lower die cover,
A crushed piece having a single or a plurality of narrow grooves formed on the surface thereof for compressively deforming the surface within the elastic limit by pressing of a cloth clamping cylindrical ring.