JP2004194862A - Snap fastener having peeling directivity - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a snap fastener having female/male snap members more easily engaged with each other and more strong in resistance of being peeled off compared with the prior art (Japan patent publication number 10-33210). <P>SOLUTION: A groove 17 extending in the eccentric direction and the perpendicular direction is provided in an engagement projection 12 in the constitution of the prior art (Japan patent publication number 10-33210). Preferably, a penetration space 15 is formed in the root part of the engagement projection 12 and around the circumference in the eccentric direction and a recess 18 is formed in the root part of the engagement projection 12 and around the circumference inverse to the eccentric direction. In fitting the female and the male snap members 1 and 4, a head part insertion guide 42 is stored in the penetration space 15 and the recess 18. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a snap fastener having a peeling direction. When the male and female members of such a fastener are attached to the fabric, the fabric cannot be easily peeled from one direction, but can be easily peeled from another direction. The snap fastener having such a direction can be used in various fields such as clothing, bags, footwear and the like.
[0002]
[Prior art]
The present applicant's own prior application, the invention of Japanese Patent Application Laid-Open No. 10-33210 (Patent Document 1), comprises a male tape formed by fixing a male snap member made of synthetic resin to a cloth tape at an arbitrary interval by resin molding means; A snap fastener with a tape comprising a female tape formed by fixing a female snap member made of a synthetic resin to a cloth tape at an arbitrary interval.
[0003]
Regarding the engagement projection of the male snap member fixed to the cloth tape, the neck and the head of the neck and the head constituting the engagement projection are the same center with respect to the male base, but the head is The engagement edge is formed eccentrically from the axial center of the neck.
[0004]
On the other hand, a head insertion guide for inserting the engagement projection into a female base having an engagement projection projected from the center of the male base fixed to the cloth tape, and an engagement hole through which the head elastically deforms and passes. And, a female snap member forming a head storage chamber in which the passed head is accommodated, for the head insertion guide, the head insertion guide and the engagement hole are formed at the same center, and for the head storage chamber, The male snap member is formed at a position eccentric from the center on the insertion side corresponding to the eccentricity of the head of the male snap member, and a locking step is formed at least on the eccentric side around the bottom.
[0005]
This snap fastener has different engagement strength depending on the peeling direction.
[0006]
In order to further increase the strength of the peeling directionality than the invention of Patent Document 1, another prior application of the present applicant, the invention of Japanese Patent Application Laid-Open No. 2001-8711 (Patent Document 2), has an arrangement in addition to that of Patent Document 1. Therefore, means for reducing the gap at the time of fitting the male and female snap members is provided. This means is, for example, a small projection provided on the neck portion opposite to the engagement edge or a projection provided on the female snap member side.
[0007]
[Patent Document 1] JP-A-10-33210 [Patent Document 2] JP-A-2001-8711
[0008]
[Problems to be solved by the invention]
The present invention relates to an improvement of the invention of the above-mentioned Patent Document 1, and an object of the present invention is to provide a snap fastener in which the male and female snap members are more easily engaged, but the peel strength is higher. And
[0009]
[Means for Solving the Problems]
The snap fastener having a peeling direction according to the present invention is a snap fastener comprising a male snap member made of a synthetic resin and a female snap member made of a synthetic resin, wherein the male snap member is provided with a projection protruding from a male base. It has a joint projection, the engagement projection is composed of a neck and a head, the head is eccentric from the axial center of the neck to form an engagement edge, and the female snap member is In a snap fastener having a head insertion guide for inserting an engagement projection, an engagement hole through which the head is elastically deformed to pass, and a female base body having a head housing chamber for accommodating the passed head, the engagement projection is provided. , Wherein at least one groove is provided.
[0010]
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The groove extends in a direction perpendicular to the longitudinal direction of the male tape and is usually one, but if it is thin, two or more grooves can be provided.
[0011]
Preferably, a through space is formed around a root portion of the engaging projection on the side of the engaging edge, and a recess is formed around a root portion of the engaging projection on the side opposite to the engaging edge. When the male and female snap members are fitted, the head insertion guide is housed in the through space and the recess.
[0012]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0013]
FIGS. 1A and 1B are partial views of a pair of tape-attached snap members according to an embodiment of the present invention, as viewed from the engagement surface side. FIG. 1A shows a male tape and FIG. FIG. 2 is an enlarged sectional view of the male snap member taken along line AA of FIG. FIG. 3 is an enlarged view of the male snap member from the side opposite to the engaging surface, and FIG. 4 is an enlarged view of the male snap member from the side of the engaging surface. FIG. 5 is an enlarged sectional view of the female snap member taken along the line BB in FIG. 1, and FIG. 6 is an enlarged view of the female snap member as viewed from the side opposite to the engaging surface. FIG. 7 is an enlarged view of the female snap member as seen from the engagement surface side.
[0014]
As shown in FIG. 1, the tape of the present invention includes a pair of tape-attached snap members of a male tape 3 and a female tape 6. The male side tape 3 is formed by fixing a plurality of polyacetal resin male snap members 1 to a nylon or cotton cloth tape 2 at predetermined intervals by molten resin injection molding means. The female tape 6 is formed by fixing a plurality of female snap members 4 of the same material as the male snap member 1 to the fabric tape 5 at the same interval or at a different interval from the male snap member 1. The pair of snap fasteners with tape is manufactured as a long product, but FIG. 1 shows only a part for convenience of illustration.
[0015]
As shown in FIG. 2, the male snap member 1 has an engagement protrusion 12 protruding from the center of the male base 11. The engagement side surface of the male base 11 is a gentle inclined surface 11a from the center toward the outside. The engagement projection 12 includes a neck 13 and a head 14. The neck 13 is a column and is co-centered with the male base 11. The head 14 forms an engaging edge 16 eccentric in one direction from the axial center of the neck. A deep groove 17 is formed through the neck 13 and the head 14 in a direction perpendicular to the longitudinal direction of the male tape. On the back side of the engaging projection 12, there is a ring-shaped shallow groove 19, which is a trace of a resin injection port at the time of injection molding.
[0016]
At the base of the neck portion 13 on the side of the engaging edge 16, a through space for allowing the die for forming the engaging edge 16 with a large catch with a simple split mold and allowing the neck portion 13 to be elastically deformed. 15 is formed in a semicircular shape. This penetration space 15 also serves as a positioning mark indicating the engagement direction.
[0017]
A recess 18 that allows the neck 13 to be elastically deformed is provided at the base of the neck 13 opposite to the engagement edge 16.
[0018]
On the other hand, as shown in FIG. 5, the female snap member 4 has a head insertion guide 42 for helping the head 14 of the engaging projection 12 of the male snap member 1 to be inserted into the female base 41, and a resilient member. An engagement hole 43 that is deformed and passes therethrough, and a head storage chamber 44 in which the passed head 14 is stored are formed. As shown in FIG. 7, two head insertion guides 42 are provided in parallel in a straight line, and as shown in FIG. 5, the cross section is semicircular. The head accommodating chamber 44 has a locking step 45, at which the engaging edge 16 of the male snap member is seated when the male and female snap members are fitted.
[0019]
Eight large and small circles 7 are drawn around the periphery of the engagement projection 12 and the periphery of the engagement hole 43, respectively, in order to sandwich the fabric tapes 2 and 5 in the injection molding stage of the male and female snap members. This is a pin hole formed by a pin of a molding die.
[0020]
The engagement state and the separation state of the male snap member 1 and the female snap member 4 configured as described above are as shown in FIGS. The engagement state will be described with reference to FIG. 8. The engagement protrusion 12 of the male snap member 1 is pushed into the engagement hole 43 from the head insertion guide 42 of the female snap member 4, and the engagement hole 43 and the head 14 are inserted. The head 14 is housed in the head accommodating chamber 44 while elastically deforming the head. As a result, the engaging edge 16 of the head 14 is locked by the locking step 45, and the male snap member 1 and the female snap member 4 are engaged. At this time, the two head insertion guides 42 are accommodated in the through space 15 and the recess 18, respectively, to reduce the gap between them (see FIG. 8).
[0021]
When the head 14 of the engaging projection 12 passes through the engaging hole 43, the head is elastically deformed in the direction in which the groove 17 of the head narrows, so that the head can be easily inserted. After the head 14 has passed through the engagement hole 43, the width of the groove 17 is restored to the original width, so that the engagement is ensured.
[0022]
On the other hand, the case where the engagement between the male snap member 1 and the female snap member 4 is released will be described with reference to FIG. 9. When a force in the separating direction (arrow direction) is applied to the cloth tape 5, the engagement protrusion 12 The width of the groove 17 is reduced, the state of engagement between the engaging step 45 on the wide side of the engaging hole 43 and the engaging edge 16 of the head 14 is loosened, and a through space formed at the root of the engaging projection 12. Due to 15, the elastic deformation span of the engaging projection 12 in the direction of the through space becomes longer. Therefore, the engaging projection 12 is easily elastically deformed (in the state of the imaginary line) by the force acting in the separating direction, so that the engagement between the male snap member 1 and the female snap member 4 can be easily performed by the separating operation of applying a slight force. Can be removed.
[0023]
In order to manufacture the snap fastener with a tape according to the embodiment of the present invention described above, a molding position is formed between upper and lower molds having a large number of male snap member molding portions or female snap member molding portions at intervals according to the molding portions. The dough tape with the holes is inserted, and the molten resin is injected into the molding section.
[0024]
【The invention's effect】
According to the snap fastener with a tape of the present invention, the engagement projection 12 of the male snap member 1 is pushed into the engagement hole 43 from the head insertion guide 42 of the female snap member 4, and the engagement hole 43 and the head 14 are inserted. By fitting the head 14 into the head accommodating chamber 44 while giving elastic deformation to the head, the engaging edge 16 of the head 14 is locked to the locking step 45.
[0025]
When the male and female snap members are fitted or released, at the moment when the head 14 of the engaging projection 12 passes through the engaging hole 43, the head is elastically deformed so that the groove 17 of the head is narrowed.・ Easy extraction. After the head 14 has passed through the engagement hole 43, the width of the groove is restored to the original width, so that the engagement is ensured. Further, since the engagement edge can be extended by the groove width, the fitting force at the time of fitting the male and female snap members is further increased.
[Brief description of the drawings]
FIGS. 1A and 1B are partial views of a pair of tape-attached snap members according to an embodiment of the present invention as viewed from an engagement surface side, where FIG. 1A is a male tape and FIG.
FIG. 2 is an enlarged sectional view of the male snap member taken along the line AA in FIG.
FIG. 3 is an enlarged view of the male snap member as viewed from a side opposite to an engagement surface.
FIG. 4 is an enlarged view of the male snap member as viewed from an engagement surface side.
FIG. 5 is an enlarged sectional view of the female snap member taken along line BB of FIG. 1;
FIG. 6 is an enlarged plan view of the female snap member as viewed from the side opposite to the engagement surface.
FIG. 7 is an enlarged bottom view of the female snap member as viewed from the engagement surface side.
FIG. 8 is a sectional view showing an engaged state between a male snap member and a female snap member.
FIG. 9 is a sectional view showing a separated state of a male snap member and a female snap member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Male snap member 2 Fabric tape 3 Male tape 4 Female snap member 5 Fabric tape 6 Female tape 7 Pin hole 11 Male base 12 Engagement projection 13 Neck 14 Head 15 Through space 16 Engagement edge 17 (deep) groove 18 recess 41 female base 42 head insertion guide 43 engagement hole 44 head storage chamber 45 locking step

Claims (4)

In a snap fastener comprising a male snap member (1) made of synthetic resin and a female snap member (4) made of synthetic resin,
The male snap member (1) has an engagement projection (12) projecting from a male base (11),
The engagement projection (12) includes a neck (13) and a head (14),
The head (14) is eccentric from the axial center of the neck (13) to form an engaging edge (16),
The female snap member (4) includes a head insertion guide (42) for inserting the engagement protrusion (12), an engagement hole (43) through which the head (14) is elastically deformed, and a passed head. A snap fastener having a female base (41) formed with a head receiving chamber (44) in which a portion (14) is accommodated,
A snap fastener having peeling directionality, wherein at least one groove (17) is provided in the engaging projection (12). The snap fastener according to claim 1, wherein a through space (15) is formed around a root portion of the engagement projection (12) on the engagement edge (16) side. The snap fastener according to claim 1, wherein a recess (18) is formed around a root portion of the engaging projection (12) opposite the engaging edge (16). 4. The snap fastener according to claim 2, wherein when the male and female snap members are fitted, the head insertion guide is accommodated in the through space and the recess.

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