JPH08294405A - Snap faster made of plastics - Google Patents

Abstract

PURPOSE: To protect from collapse the bottom of the cloth engaging recess of a snap head and to enhance the efficiency of snap attaching work by interposing a gasket between the snap head and the cloth to which the snap head is fastened under pressure. CONSTITUTION: A female snap main body 1 has a fastening stud insertion hole 5 formed at the center of the bottom of an engaging recess 4 with its bottom inner diameter designed to be larger than the opening inner diameter, and a cloth engaging flange 6 is formed, provided with a multiplicity of protrusions 7 for the prevention of rotation, to surround the engaging recess 4. A male snap 3 is the same as the female snap main body 1 in outer diameter, with a fastening stud insertion hole 5 formed at the center of the bottom of a cylindrical engaging column 8 to engage with the engaging recess 4, and a multiplicity of protrusions 7 are formed on the circumference of the cloth engaging surface for the prevention of rotation. The snap head 2 is provided with a cloth engaging recess 9 and fastening stud 10, and a soft urethane made gasket 12, provided with a stud accommodating hole 11 at its center, with its outer diameter so designed as to fit into the cloth engaging recess 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin hook which is widely used for opening and closing clothes, bags, raincoats, diaper covers and the like.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional synthetic resin hook includes a female hook including a female hook main body 1 and a hook head body 2, and a male side including a male hook main body 3 and a hook head body 2. It consists of a hook and.

In the female hook main body 1, a caulking leg insertion hole 5 is formed at the center of the bottom of a locking recess 4 formed in an undercut state, and a dowel pinning collar 6 formed around the locking recess 4 is formed. A plurality of protrusions 7 for preventing rotation are formed on the sandwiching surface, and the male hook main body 3 has the same outer diameter as that of the female hook main body 1 and is engaged with the locking recess 4. The caulking leg insertion hole 5 is formed at the center of the bottom of the cylindrical locking leg 8, and a large number of protrusions 7 for preventing rotation are formed on the peripheral edge of the cloth clamping surface side. Is
On the back surface of the head, the male hook main body 3 or the female hook main body 1 is loosely fitted, and a cloth holding recess 9 having an inner diameter and a caulking leg 1 at its center
It has a configuration in which 0 is provided in a protruding manner.

Each of these hook components is a hook head body 2.
Of the female hook main body 1 or the male hook main body 3 such that the protrusions 7 are formed on the cloth surface by passing the caulking legs 10 of It is attached to the cloth by caulking the caulking leg 10 protruding into the stop recess 4 or the cylindrical locking leg 8.

[0005]

However, in the synthetic resin hook configured as described above and attached to the cloth, the projection 7 provided for preventing rotation acts when the cloth to be attached is thin. Although the hook head body 2 is prevented from rotating with respect to the cloth, the cloth enters deeply into the cloth holding recess, so that wrinkles are formed in the cloth around the hook head body 2 and the attachment appearance is deteriorated.

When the material to be attached is thick, wrinkles are not formed during the attachment, but the adhesion of the hook head body 2 to the material is deteriorated, and the anti-rotation function of the protrusions 7 does not work or deteriorates. , The hook head body 2 is rotated with respect to the attachment cloth, and especially when the hook head body 2 expresses a decorative pattern or the like having directionality, the direction cannot be secured and the decorativeness is impaired.

Further, the bottom portion of the material holding concave portion 9 of the hook head body 2 may be crushed and broken by the force applied during the crimping process of the crimping leg 10, so that the hook mounting work efficiency by the automatic, semi-automatic or manual machine is improved. It is causing the decline.

According to the present invention, the existing hook constituent members can be used as they are, and the attachment wrinkles are not formed due to the thickness of the cloth, and the attachment direction of the hook head body with respect to the cloth to be attached can be secured and maintained. The purpose of the present invention is to provide a resin hook at a low cost.

[0009]

Means for Solving the Problems A synthetic resin hook according to the present invention comprises a female hook main body having a desired outer diameter in which a caulking leg insertion hole is formed at the bottom center of a locking recess formed in an undercut state, A male hook main body having the same outer diameter as that of the female hook main body and having a caulking leg insertion hole formed at the bottom center of the cylindrical locking leg engaging with the locking recess, and on the back surface of the head. The male and female hooks are loosely fitted into the cloth-holding recess, and the cloth is penetrated through the center of the recess to be inserted into the caulking leg insertion hole and crimped in the locking recess or the tubular locking leg. In a resin hook including two hook heads with protruding caulking legs, a packing made of an elastic member that is softer than a synthetic resin member forming the hook component is provided in the cloth holding recess of the hook head. It is characterized in that a member is provided.

[0010]

When the synthetic resin hook configured as described above is caulked and fixed to the cloth, the packing member interposed between the hook head and the cloth cushions the shock during caulking and The elastic deformation corresponding to the thickness of the material prevents the formation of wrinkles to a minimum, and the restoring force of elastic deformation always acts even after caulking and fixing, resulting in a large rotational friction resistance. Is exerted and not only prevents the hook head from rotating with respect to the fabric, but also serves to complement the looseness caused by frequent desorption.

[0011]

FIG. 1 is an exploded sectional view of a synthetic resin hook according to an embodiment of the present invention, FIG. 2 is a plan view of a male hook as a main body, and FIG. 3 is a sectional view showing a state in which it is fastened and engaged with a base cloth. It is a figure and is made from hard polyacetal resin (JIS D code 80 to 95 °), and the female side hook which consists of the female hook main body 1 and the hook head body 2, and the male side consisting of the male hook main body 3 and the hook head body 2. The hook head body 2 is provided with a novel structure, and a remarkable working effect is achieved in a coupling relationship between the hook head body 2 and the female hook main body 1 or the male hook main body 3.

First, the female hook main body 1 has a caulking leg insertion hole 5 formed at the center of the bottom of a locking recess 4 formed in a so-called undercut state in which the inner diameter of the bottom is larger than the inner diameter of the opening. A plurality of protrusions 7 for preventing rotation are formed on the holding surface of the material holding collar 6 formed around the stop recess 4, and the male hook main body 3 has the same outer diameter as the female hook main body 1. A caulking leg insertion hole 5 is formed at the center of the bottom of the cylindrical locking leg 8 that is the outer diameter and that engages with the locking recess 4, and a large number of rotation preventing projections are formed on the peripheral edge of the cloth clamping surface side. This is the same as the conventional one in that it has a configuration in which 7 is formed.

On the other hand, the hook head body 2 has a cloth holding recess 9 having an inner diameter in which the male hook main body 3 or the female hook main body 1 is loosely fitted on the back surface of the head, and a caulking leg 10 projecting from the center thereof. A soft urethane resin (JIS A code 80-
A packing member 12 made of 100 °) is provided in the material sandwiching concave portion 9 by means such as fitting, adhesion, and melt integration.

Each of these hook constituents is a hook head body 2.
The caulking legs 10 of the
After the female hook main body 1 or the male hook main body 3 is loaded through the caulking leg insertion hole 5 so that the projection 7 becomes the cloth surface, the caulking protruding into the locking concave portion 4 or the cylindrical locking leg 8 is performed. The leg 10 is attached to the cloth by caulking.

When the synthetic resin hook according to the embodiment configured as described above is fixed to the cloth S by caulking, since the packing member 12 is interposed between the hook head 2 and the cloth S, this is added. It reduces the impact during tightening, elastically deforms according to the thickness of the fabric to minimize the formation of wrinkles, and the restoring force of elastic deformation always works even after caulking and fixing. Therefore, when the rotation of the hook head 2 with respect to the fabric S is blocked by the exertion of a great rotational friction resistance and the protrusion 7, the hook head 2 is provided with characters, patterns, etc. (not shown). In addition to ensuring a certain directionality, the loosening of the mutual connection caused by frequent desorption is complemented by the restoring action of the packing member to maintain the mounting stability for a long time.

In the above embodiment, the protrusion 7 for preventing rotation is used because of the structure using the existing hook.
However, even if the protrusion 7 is not provided, the rotation of the hook head body 2 with respect to the cloth S can be surely prevented, and the direction of characters, patterns, etc. (not shown) of the hook head body 2 can be surely prevented. It is possible to secure the sex.

Further, the hook head body 2 is not limited to the synthetic resin member because the same effect can be achieved even if the hook head body 2 is made of metal.

[0018]

As described above, according to the synthetic resin hook of the present invention, in the case of caulking and fixing to the cloth, the packing member interposed between the hook head body and the cloth causes (1) caulking. The impact at the time of processing can be mitigated to prevent the bottom portion of the cloth holding recess 9 of the hook head body 2 from being crushed and broken, and the efficiency of hook mounting work by an automatic, semi-automatic, or manual machine can be improved.

(2) Corresponding to the thickness of the material, it is elastically deformed to minimize the formation of wrinkles and improve the appearance.

(3) Further, since the restoring force of elastic deformation always acts even after caulking and fixing, great rotational frictional resistance is exerted, rotation of the hook head with respect to the cloth is prevented, and the hook head body Can be secured, and the decorativeness when the directional decorative pattern or the like is expressed on the hook head body 2 can be maintained in a good state.

(4) Further, due to the resilience of the packing member, the looseness caused by frequent detachment is complemented,
The stable mounting state of the hook is maintained.

(5) Further, since it can be constituted by providing a packing member without changing the structure of the existing hook, an inexpensive synthetic resin hook is provided in cooperation with the effect of the above (1). be able to.

[Brief description of drawings]

FIG. 1 is an exploded cross-sectional view of a pair of synthetic resin hooks according to an embodiment of the present invention.

FIG. 2 is a plan view of a male hook main body according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state in which the synthetic resin hook according to the embodiment of the present invention is fixed to and engaged with the cloth.

FIG. 4 is an exploded cross-sectional view of a pair of a female hook and a male hook, which is an example of a conventional synthetic resin hook.

[Explanation of symbols]

 1 Female hook main body 2 Hook head body 3 Male hook main body 4 Locking concave portion 5 Caulking leg insertion hole 6 Fabric clamping pin 7 Protrusion 8 Cylindrical locking leg 9 Fabric clamping recess 10 Caulking leg 11 Leg hole 12 Packing Material S Fabric

Claims (3)

[Claims] 1. A locking recess formed in an undercut state
A female hook main body (1) having a desired outer diameter with a caulking leg insertion hole (5) formed in the bottom center of (4), and an outer diameter that is the same as the outer diameter of the female hook main body (1). A male hook main body (3) with a caulking leg insertion hole (5) formed at the bottom center of a cylindrical locking leg (8) that engages with the locking recess (4), and the male and female on the back of the head. Hook mainly (3),
(1) is the inner diameter of the material holding recess (9), and the center of the material is passed through the material and is inserted through the caulking leg insertion hole (5) into the locking recess (4) or cylindrical locking. The crimping leg (1
(2) is a synthetic resin hook consisting of two hook heads (2) protruding from the hook head body (2).
(9) A hook made of synthetic resin, characterized in that a packing member (12) made of an elastic member softer than the synthetic resin member forming the hook component is provided. 2. A JIS D as a synthetic resin for a hook constituent member.
The synthetic resin hook according to claim 1, wherein the hook is made of polyacetal resin having a code of 80 to 95 ° and the packing member (12) is made of urethane resin having a JIS A code of 80 to 100 °. 3. The synthetic resin hook according to claim 1 or 2, wherein only the hook head body (2) is made of metal.