JP4725738B2 - Plastic snap fastener - Google Patents

Description

  The present invention relates to a synthetic resin snap fastener comprising a female fitting member and a male fitting member, and a rivet member for attaching them to a flexible sheet such as a cloth for clothes or a plastic bag.

  For example, a synthetic resin rivet member with a protrusion piercing through a flexible sheet such as a cloth for clothes or a plastic bag protruding from the center of the back surface of the circular head, and a substantially cylindrical tip on the surface of the circular substrate A through hole for forming a female fitting portion formed with a bulging portion for engagement on the inner peripheral surface of the side and penetrating the protrusion pierced into the sheet into the center of the substrate in the female fitting portion to fix it. A female snap with a synthetic resin female fitting member formed with a synthetic resin rivet member with a protrusion projecting through the flexible sheet protruding from the center of the back surface of the circular head, and a circular substrate A male fitting portion having a substantially cylindrical shape and a bulging portion for engagement formed on the outer peripheral surface on the front end side is formed on the surface of the substrate, and a protrusion pierced through the sheet is inserted through the center of the substrate in the male fitting portion. Male fitting member made of synthetic resin with through-holes for securing Synthetic resin snap fastener consisting of a male snap is known by Patent Documents 1 and 2 by.

  In this type of synthetic resin snap fastener, as shown in FIG. 5A, the female fitting member 1 and the male fitting member 3 have substantially the same diameter, and the male fitting member No. 3 was molded into a shape in which the tip of the male fitting portion 10b protruded by an appropriate distance H further outward (on the surface side) in the axial direction than the outer edge portion of the surface of the circular substrate 8b.

Therefore, in the fitting state of the female and male snaps A ₁ and A ₂ shown in FIG. 5B, the clothes are pulled in the in-plane direction, etc., so that the female snap A ₁ and the male snap A ₂ are laterally moved ( When force in the arrow directions a and b) is applied, the male fitting portion 10b of the male fitting member 3 is pushed and elastically deformed by the female fitting portion 10a, and the male fitting portion 10b and the female fitting portion 10b are elastically deformed. In some cases, the fitting of the mold fitting portion 10a was unexpectedly disengaged. This tendency is particularly noticeable when the snap fastener has a small size and the male fitting portion 10b has a small thickness in the diameter direction, or when the snap fastener material resin is a soft synthetic resin such as polyester. .

  In addition, since the tip of the male fitting portion 10b protrudes from the outer edge portion of the surface of the circular substrate 8b, when pressing the washed clothes with an iron or a roller, the iron or roller is attached to the male fitting portion 10b. When hitting the tip, the tip of the male fitting portion 10b may be crushed, and as a result, the fitting with the female fitting portion 10a may become unstable or impossible to fit.

JP 2004-248704 A JP 2005-152059 A

  The present invention has been made in consideration of the above points, and its purpose is to prevent the tip of the male fitting portion from being crushed by ironing, and the clothes are pulled in the in-plane direction. Thus, it is an object of the present invention to provide a synthetic resin snap fastener that does not easily disengage the female and male snaps even when a lateral force is applied to the female and male snaps.

  In order to achieve the above object, technical measures taken by the present invention are as follows. That is, the present invention includes a synthetic resin rivet member in which a protrusion that pierces a flexible sheet protrudes from the center of the back surface of the circular head, and a substantially cylindrical shape on the surface of the circular substrate and the inner peripheral surface on the front end side. A female fitting portion formed with a bulging portion for engagement is formed, and a through hole is formed in the center of the substrate in the female fitting portion for penetrating the protrusion pierced through the sheet and fixing it. A female snap formed by a female fitting member made of synthetic resin, a synthetic resin rivet member in which a protrusion penetrating the flexible sheet protrudes from the center of the back surface of the circular head, and a surface of the circular substrate. A male fitting portion that is cylindrical and has a bulging portion for engagement formed on the outer peripheral surface on the distal end side is formed, and a protrusion that penetrates the sheet is passed through the center of the substrate in the male fitting portion to be caulked. A male snap with a synthetic resin male fitting member with a through hole for Synthetic resin snap fasteners, which are provided with an annular ridge that is taller than the male fitting portion on the outer edge of the surface of the circular substrate of the male fitting member, and the female and male snaps are fitted to each other. In the state, when the female fitting portion is fitted into an annular groove formed between the male fitting portion and the annular ridge portion, the female fitting member moves in the lateral direction with respect to the male fitting member. It is characterized by having comprised so that it may be blocked | prevented by an annular protruding part.

  According to the present invention, since the annular ridge having a height higher than that of the male fitting portion is provided at the outer edge portion of the surface of the circular substrate in the male fitting member, the tip of the male fitting portion is more than the annular ridge portion. Will be positioned inward in the axial direction, and when pressing the washed clothes with an iron or roller, the iron or roller will hit the tip of the male fitting, and the tip of the male fitting will be pushed. It can be prevented from being crushed, and in the fitted state of the female and male snaps, the female fitting part fits into an annular groove formed between the male fitting part and the annular ridge. As a result, the lateral movement of the female fitting member relative to the male fitting member is prevented by the annular ridge, so that the fitting can be removed by pulling the female snap and the male snap apart in the axial direction. You can, however, the female snap and male sn Even if a lateral force is applied to the lip, the female fitting part hits the inner peripheral surface of the annular ridge, and the male fitting part is restricted from being deformed more than a certain amount. There is no risk of unintentional disconnection.

1 to 4 show an example of a synthetic resin snap fastener composed of a female snap A ₁ and a male snap A ₂ . The female snap A ₁ is a female fitting member 1 and a rivet member 2 that is attached to a flexible sheet (for example, a cloth for clothes, a tape-like cloth, a plastic bag, etc. The same applies hereinafter) B ₁ . The male snap A ₂ is composed of a male fitting member 3 and a rivet member 4 for attaching it to the flexible sheet B ₂ .

  The female fitting member 1, the male fitting member 3, and the rivet members 2 and 4 are all made of polyester, but may be made of polybutylene terephthalate or polyacetal.

  The rivet members 2 and 4 are formed by protruding protrusions 5b and 6b having a circular cross section and sharp at the center of the back surface of the circular heads 5a and 6a.

The female fitting member 1 is a circular substrate 8a in which a through hole 7a having a circular shape into which the protrusion 5b of the rivet member 2 is inserted and having an inner diameter substantially equal to the thickness of the protrusion 5b (for example, about 0.1 mm larger) is formed. on the surface (the surface of the flexible sheet B ₁ and the facing surfaces opposite), and is divided into the tip side inner circumferential surface in the circumferential direction a plurality generally cylindrical shape projecting into the through-hole 7a and coaxially and engagement bulging portion formed by integral molding of the female fitting part 10a forming a (undercut portion) 9a, the flexible sheet B ₁ in piercing projections 5b of the rivet member 2 into the through hole 7a It is configured to be inserted and deformed by expanding the diameter of the projecting tip by striking to stop it. The bulging part 9a for engagement is provided at a position slightly lower (for example, about 0.1 to 1 mm) than the tip of the female fitting part 10a. Further, on the back side of the female fitting portion 10a, an annular groove 12 is formed which is divided into a plurality of circumferential directions by radial reinforcing ribs 11.

The male fitting member 3 has a circular shape into which the protrusion 6b of the rivet member 4 is inserted and a circular substrate 8b formed with a through hole 7b having an inner diameter substantially equal to the thickness of the protrusion 6b (for example, about 0.1 mm larger). on the surface (the surface of the flexible sheet B ₂ and the facing surfaces opposite), is and divided distally outer peripheral surface in the circumferential direction a plurality generally cylindrical shape projecting into the through-holes 7b and coaxially formed by integral molding of the male fitting portion 10b formed engagement protruding portion (undercut portion) 9b, insert the projection 6b of the rivet member 4 pierces the flexible sheet B ₂ into the through-hole 7b The projecting tip portion is configured to be expanded and deformed by striking to be caulked.

In this embodiment, in the synthetic resin snap fastener having the above-described configuration, an annular ridge 13 that is taller than the male fitting portion 10b is provided on the outer surface of the circular substrate 8b of the male fitting member 3, The distal end of the male fitting portion 10b is positioned slightly inward (for example, about 0.1 to 1 mm) h from the distal end of the annular ridge portion 13 in the axial direction, while the outer side of the female fitting member 1 is outside. The diameter is slightly smaller than the inner diameter of the annular ridge 13, and the female fitting portion 10 a is located between the male fitting portion 10 b and the annular ridge 13 in the fitting state of the female and male snaps A ₁ and A _2. It is characterized in that it is configured to prevent the lateral movement of the female fitting member 1 with respect to the male fitting member 3 by the annular ridge 13 by fitting into the annular groove 14 formed in the annular groove 14.

  In the illustrated example, the inner peripheral surface of the annular raised portion 13 in a state where the female fitting portion 10a is fitted in the annular groove 14 formed between the male fitting portion 10b and the annular raised portion 13. Is set so that a minute gap S is formed between the outer surface of the female fitting portion 10a and the female fitting portion 10a. 13 may be set so that the inner peripheral surface of the annular raised portion 13 and the outer peripheral surface of the female fitting portion 10a come into contact with each other when fitted into the annular groove 14 formed between them. In the illustrated example, the inner peripheral surface on the tip side of the annular ridge 13 is formed perpendicularly (parallel to the axis), but it may be an inclined surface located radially outward as the tip side.

  According to said structure, since the cyclic | annular protruding part 13 taller than the male fitting part 10b was provided in the surface outer edge part of the circular board | substrate 8b in the male fitting member 3, of the male fitting part 10b. The tip is positioned inward of the annular ridge 13 in the axial direction, and when pressing the washed clothes with an iron or roller, the iron or roller does not hit the tip of the male fitting portion 10b. It can prevent that the front-end | tip part (engagement swelling part 9b) of the male fitting part 10b is crushed. Also in the female fitting member 1, the bulging portion 9 a for engagement is provided at a position slightly lower than the tip of the female fitting portion 10 a, so that the iron or roller is at the tip of the female fitting portion 10 a. It is possible to prevent the tip end portion (engaging bulging portion 9a) of the female fitting portion 10a from being crushed.

Moreover, in the fitted state of the female and male snaps A ₁ and A ₂ , the female fitting portion 10 a is located between the male fitting portion 10 b and the annular raised portion 13 as shown in FIG. by fit into the annular groove 12 formed on, the movement in the lateral direction of the female fitting member 1 with respect to the male engaging member 3 is restricted by the annular ridge 13, the female snap a ₁ and the male snap Although the fitting can be released by pulling A ₂ away in the axial direction, the clothes are pulled in the in-plane direction, and the lateral direction (arrow directions a and b) is applied to female snap A ₁ and male snap A _2. ) Is applied, the outer peripheral surface of the female fitting portion 10a hits the inner peripheral surface of the annular raised portion 11, and the male fitting portion 10b is prevented from being deformed more than a certain amount. There is no possibility that the male snaps A ₁ and A ₂ will be unintentionally disconnected.

It is a perspective view explaining the structural member of the synthetic resin snap fasteners concerning this invention. It is a perspective view of a male fitting member. It is a vertical side view of a male fitting member. It is a vertical side view of a synthetic resin snap fastener. It is a vertical side view of the conventional synthetic resin snap fastener.

Explanation of symbols

A ₁ female snap A ₂ male snap B ₁ flexible sheet B ₂ flexible sheet 1 female fitting member 2,4 rivet member 3 male fitting member 5a, 6a circular head 5b, 6b protrusion 7a, 7b Through hole 8a, 8b Circular substrate 9a, 9b Engaging bulging part 10a Female fitting part 10b Male fitting part 13 Annular raised part 14 Annular groove

Claims (1)

    A synthetic resin rivet member having a protrusion penetrating the flexible sheet protruding from the center of the back surface of the circular head, and a substantially cylindrical shape on the surface of the circular substrate and a bulging portion for engagement on the inner peripheral surface on the front end side A female mold made of synthetic resin, in which a female mold fitting portion is formed, and a through hole is formed in the center of the substrate in the female mold fitting portion for penetrating the protrusion pierced through the sheet and fixing it. A female snap by a fitting member, a synthetic resin rivet member with a protrusion penetrating the flexible sheet protruding from the center of the back surface of the circular head, and a substantially cylindrical shape on the front surface of the circular substrate A male fitting portion having an engagement bulging portion formed on the outer peripheral surface is formed, and a through hole is formed in the center of the substrate in the male fitting portion to penetrate the protrusion pierced by the sheet and fix it by caulking Synthetic resin comprising a male snap with a synthetic resin male fitting member The snap fastener is a female mold in a state in which an annular bulge portion that is taller than the male fitting portion is provided on the outer edge of the surface of the circular substrate in the male fitting member, and the female and male snaps are fitted to each other. By fitting the fitting portion into an annular groove formed between the male fitting portion and the annular ridge, the lateral movement of the female fitting member with respect to the male fitting member can be performed by the annular ridge. A synthetic resin snap fastener characterized by being configured to prevent.

Images