JPS61290905A - Hook - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention forms an eyelet hook by fixing and protruding a metal eyelet member to a synthetic resin hook member, and the eyelet member is made of a material such as fabric. The flexible sheet is pierced, and a male or female fastening hook member is externally fitted to the eyelet member, and the end portion of the eyelet member is expanded and deformed diametrically outward to be caulked. Regarding the improvement of the hook.

[Conventional technology]

Conventionally, as shown in Fig. 9, a hook member made of synthetic resin was used.
An annular protrusion a is integrally molded on the outer periphery of the back surface of the metal eyelet member 2, and the flange part of the metal eyelet member 2 having a flange part formed at the base end is brought into contact with the back surface side of the hook member 1, and The eyelet hook E is constructed by striking the projection a and mechanically bending the annular projection a toward the back side of the flange, and the eyelet member 2 of the eyelet hook E is attached to the flexible sheet c.
At the same time, the eyelet member 2 is fitted with the fastening hook member A, and the tip of the cylindrical portion of the eyelet member 2 is expanded and deformed diametrically outward to attach, for example, a female hook. It consists of

Alternatively, as an eyelet hook E, as shown in FIG. 10, an annular protrusion C concentric with the annular protrusion a on the outer periphery is integrally molded in the middle of the back surface of the synthetic resin hook member 1, and this annular protrusion C is By striking the metal eyelet member 2 so that it is shorter than the outer annular protrusion d and mechanically bending it toward the back side of the flange of the metal eyelet member 2, the eyelet member 2 is turned into a honky member 1.
There is also one (for example, Japanese Utility Model Publication No. 56-30251) in which it is fixed to.

[Problem that the invention seeks to solve]

The above-mentioned eyelet hook integrates the synthetic resin hook member 1 and the metal eyelet member 2 by mechanical bending (squashing) of the annular protrusions a and C, so injection molding of the synthetic resin hook member is performed. Compared to traditional eyelet hooks, which sometimes had a metal eyelet inserted, there is no need for a special mold for injecting molten resin while holding the eyelet concentrically, and it is easier to manufacture. Although this method has advantages such as a significant cost reduction, there is still room for improvement in that the hook member 1 and eyelet member 2 are easily separated unexpectedly.

That is, in the eyelet hook described above, a part of the hook member 1 (annular protrusions a, c) is crushed and the plastically deformed resin portion is held in the flange of the eyelet member 2, thereby forming the hook. Although the member 1 and the eyelet member 2 are integrated, for example, in a jumper, etc., the tensile force when pulling the fabric to release the delamination hook is applied to the plastically deformed resin part. , the resin part is easily broken by such external force, and the hook member 1 and the eyelet member 2 are separated. The present invention improves this point and combines a synthetic resin hook member with a synthetic resin hook member. A hook that can effectively prevent the hook member and the eyelet member from separating, despite adopting a cost-effective manufacturing method in which the metal eyelet member and the eyelet member are manufactured separately and later integrated into one. We are trying to provide the following.

In order to achieve the above object, the present invention provides the hook described at the beginning, in which a protrusion into which the eyelet member is fitted is formed at the center of the back side of the hook member, and at the same time the diameter of the eyelet member is expanded and the protrusion is deformed. The eyelet member is characterized in that the tip of the eyelet member is expanded in diameter outward in the diameter direction, and the expanded diameter portion is superimposed on the outside of the expanded diameter portion of the eyelet member.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings. Fig. 1 shows a female type hook and a male type hook (snap fastener) that are elastically fitted to each other, and each hook includes a female type hook member A and a male type hook member A for fastening the female type and It consists of a male hook member B and eyelet hooks E and F for attaching these to a flexible sheet C1D such as cloth.

The female type fastening hook member A has a fastening surface portion A1 having a hole in the center, and a U-shaped cross-section portion A2 continuous to the circumference of the fastening surface portion A1.
An annular raised portion A is provided at the outer end of the inner peripheral portion of the U-shaped portion A2.

The male type fastening hook member B consists of a fastening surface part B having a hole in the center, and a cylindrical part B2 that enters into the recessed space P of the female type fastening hook member A, and the cylindrical Part B
At the outer end of the outer periphery of 2, an annular raised part B that elastically engages with the annular raised part A is formed.

By pushing the cylindrical portion Bt of the male hook member B into the recessed space P of the female hook member A against the elastic restoring force of the annular raised portions Az and B3, the female Hook members A and B for fixing the mold and the male mold are connected in a locking manner.

As shown in FIG. 2, the eyelet hook E includes a decorative synthetic resin hook member 1 that is applied to one side of the flexible sheet C, and a part that is fixed and protrudes from the back side and has a generally cylindrical shape. One of the eyelet members 2 includes a large diameter cylindrical part 2b on the proximal end side having a stepped part 2a in the middle part, a small diameter cylindrical part 2c on the distal end side, and the large diameter cylindrical part 2a. 2b and a circular flange 2d provided at the base end.

The other hook member 1 is composed of a spherical head 1a, a raised portion 1b projecting from the center of the back side thereof, and an annular raised portion 1c projecting from the outer periphery of the back surface of the head 1a.

The raised portion 1b is fitted into the eyelet member 2 from the large diameter cylindrical portion 2b to the intermediate portion of the small diameter cylindrical portion 2c, and has a narrow hole 1d of an appropriate depth in the axial center of the raised portion 1b. is formed. This hole 1d is provided to prevent a recess from being formed at the center of the surface of the head 1a due to shrinkage of the synthetic resin when the hook member 1 is injection molded from a synthetic resin material.

The inner diameter of the annular raised portion IC in the hook member 1 is set to be minimum at an axially intermediate position of the raised portion 1b, and this minimum inner diameter is set to be slightly smaller than the diameter of the collar portion 2d. ing. Then, by pushing the flange 2d into the annular ridge IC against the elastic restoring force of the annular ridge 1c, the flange 2d is pushed into the annular ridge 1c.
c. In addition, the annular raised part IC
A slope S with an outward wave is formed on the inner surface of the
The guiding action allows the collar portion 2d to be easily and smoothly pushed into the annular raised portion IC.

Next, to explain a method for manufacturing a female hook, as shown in FIG. The cylindrical portions 2b and 4c of the eyelet member 2 of the hook E are opened onto a flexible sheet (C) such as cloth, and the female type fastening hook member A is attached to the opened large diameter cylindrical portion 2b. After fitting outwardly, the tip of the opened cylinder portion 2C is struck with a hammer 5 of a hook driver.

Then, as shown in FIG. 3(b), the tip is crushed and deformed to expand diametrically outward, and at the same time, the raised portion 1b is also crushed diametrically outward. , a diameter-expanding deformation portion y is formed that overlaps the outside of the diameter-expansion deformation portion X of the eyelet member 2, and furthermore, the volume change due to the crushing of the tip of the raised portion 1b is caused by the change in diameter expansion of the raised portion 1b. As a result, it comes into strong pressure contact with the inner surface of the cylindrical portion 2b, and in addition to the engagement of the flange portion 2d with the annular raised portion 1c, the formation of the enlarged diameter deformed portion y and the enlarged diameter of the raised portion 1b, the eyelet is closed. The member 2 can be firmly fixed to the hook member l.

The structure and manufacturing method of the eyelet hook F are substantially the same as the eyelet hook E, and the eyelet hook has a structure in which the flange 2d is engaged with the annular protrusion IC. It differs from eyelet hook E only in that it does not have a mating configuration. That is, the eyelet hook F is
As shown in FIG. 4, there is a decorative synthetic resin hook member 3 that is attached to one side of the flexible seam) D, and a metal eyelet member that is fixed and protrudes from the back side and has a generally cylindrical shape. 4, and one eyelet member 4 is
It is composed of a large-diameter cylindrical portion 4b on the proximal side having a stepped portion 4a in the middle, a small-diameter cylindrical portion 4C1 on the distal end, and a circular collar portion 4d provided at the proximal end of the large-diameter cylindrical portion 4b. .

The other hook member 3 is composed of a spherical head 3a and a protrusion 3b protruding from the center on the back side of the head 3a. An annular stepped portion 3c having the same thickness as the flange portion 4d is formed. 3d in Fig. 0 is a thin hole formed in the axis of the raised portion 3b to prevent sink marks.

Thus, as shown in FIG. 5, the raised portion 3 of the hook member 3
The cylindrical portions 4b and 4c of the eyelet member 4 fitted in the eyelet member 4 are opened onto the flexible sheet D, and the tip of the small diameter cylindrical portion 4C is struck with the hammer 5 of the hook driver, so that the tip of the cylindrical portion is The hook is produced by simultaneously forming the diameter-expanding deformation portion X of the raised portion 3b outward in the diametrical direction by the impact.

According to the above hook structure, the cylindrical portion 2b of the eyelet member 2.4
, 3b of the hook member 1.3 at the same time as the caulking is performed to expand the tip of the hook member 1.3 outward in the diametrical direction.
The diameter of the eyelet member 2.4 is expanded diametrically outward, and this expanded diameter deformed portion y overlaps the expanded diameter deformed portion X of the eyelet member 2.4, and the diameters of the raised portions 1b and 3b are expanded. By forming the diameter-expanding deformation portion y and pressing the raised portions 1b and 3b against the inner surface of the cylindrical portion by expanding their diameters, it is possible to firmly prevent separation of the eyelet member 2.4 from the hook members 1 and 3, and furthermore, the diameter-expanding deformation can be prevented. The part y is the recessed space P of the fastening hook members A and B,
Since it is located within Q, the tensile force applied to the flexible sheets C and D when separating the male and female hooks and other external forces do not directly apply to the diameter enlarged deformation portion y. , like the conventional eyelet hook in which a thin resin part formed by crushing a part of the hook member is engaged with the flange of the eyelet member, the thin plastically deformed resin part that engages with the flange breaks. There is no risk that the hook member 1.3 and the eyelet member 2.4 are firmly fixed, and the hook member 1
, 3 and the eyelet member 2.4.

Another embodiment is shown in FIG. 6, which includes eyelet hook E,
A feature is that a part of the eyelet member 2.4 of F is plastically deformed inward in the diametrical direction, and the protrusions 2e, 4e resulting from the plastic deformation are engaged with the protrusions 1b, 3b of the hook member 1.3. For example, as shown in FIG. Then, with the hook member 1 placed on the stand 6, the outer cylinder 8 of the chuck device 7 is lowered, and the plurality of claws 9 of the chuck device 7 are used to Holding the cylindrical portion 2b, a part of the cylindrical portion 2b is plastically deformed diametrically inward, and the protruding portion 2e on the inner surface of the cylindrical portion is formed into the raised portion 1b.
By biting into the hook member 1 and eyelet member 2
In this way, the eyelet hook E was constructed.

The lengths of the raised portions 1b and 3b are such that the lengths of the cylindrical portions 1b and 3b are such that when the fastening hook members A and B are caulked to the eyelet hooks E and F, the lengths of the cylindrical portions 2b and 4b are closer to the tip end of the cylindrical portions than the position where the cylindrical portions 2b and 4b are deformed to expand in diameter. The ridges 1b and 3b are located at the extremes.
may be in a state where it slightly protrudes from the tip of the cylindrical portion.

In addition, in FIGS. 2, 4, and 7, the stepped portion 2a,
4a, but as shown in FIG. 8, the raised part 1b (3b) and the cylinder part 2 that fits this
b (4b) can be formed into a tapered shape or, although not shown, can be formed into a straight shape without a step.

〔Effect of the invention〕

As explained above, the hook of the present invention has a protrusion in which the eyelet member is fitted, formed at the center of the back side of the hook member, and at the same time as the eyelet member is deformed to expand its diameter, the tip of the protrusion is moved diametrically outward. Since the enlarged diameter deformed portion was superimposed on the outside of the enlarged diameter deformed portion of the eyelet member, the synthetic resin hook member and the metal eyelet member were manufactured separately and then joined together. Despite adopting the cost-effective means of integrating the hook member and eyelet member, the hook member and eyelet member can be firmly and firmly fixed, and there is no risk of the hook member and eyelet member being accidentally separated. effective.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view of a female type and male type hook, and FIG. 2 is a sectional view of a female eyelet hook. is a manufacturing explanatory diagram of the eyelet hook. FIG. 4 is a cross-sectional view of the male eyelet hook, and FIG. 5 is a manufacturing explanatory diagram of the eyelet hook. FIG. 6 is a sectional view of a female hook and a male hook of another embodiment, and FIG.
The figure is a manufacturing explanatory diagram of one of the eyelet hooks, FIG. 8 is a sectional view of another embodiment of the eyelet hook, and FIGS. 9 and 10 are sectional views showing conventional examples. 1, 3... Synthetic resin hook member, 2.4... Metal eyelet member, lb, 3b... Raised portion, x, y...
・Diameter expansion deformation part, A, B...Hook member for attachment, C...
・Flexible sheet. Figure 3 (a) Figure 3 (-)) Figure 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] An eyelet hook formed by fixing and protruding a cylindrical metal eyelet member at the center of the back side of a synthetic resin hook member, and piercing the eyelet member into a flexible sheet, and attaching a fastening hook member to the eyelet member. The hook is formed by fitting outwardly and deforming the distal end of the eyelet member to expand in diameter outward in the diametrical direction, and a protruding portion into which the eyelet member is fitted is formed at the center of the back side of the hook member. , the tip of the raised portion is deformed diametrically outward at the same time as the eyelet member is expanded in diameter, and the expanded diameter portion is overlapped with the outside of the expanded diameter portion of the eyelet member. Features a hook.