JPS638245Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention integrates a fitting member having a through hole in the center and a synthetic resin mounting member having a cylindrical shaft with an open end by sandwiching a membrane-like base material. The present invention relates to an improvement in a hooking jig for crushing a portion of a cylindrical shaft body that is inserted into the through hole while penetrating the membrane base material and that protrudes from the through hole.

Conventionally, as shown in FIG. 4, in this type of hook attachment jig, the tip opening edge of the cylindrical shaft body 6 protruding from the through hole 3 is connected to the shaft of the cylindrical shaft body 6 at the center of the tip. By pressing the cylindrical shaft body 6 with a jig having a shape protruding in the pressing direction against the core, it is plastically deformed into an outwardly expanded state, and this deformed shaft body portion is engaged with the periphery of the through hole 3. Therefore, the membrane base material A
It was attached to. For this reason, when the tip opening edge of the cylindrical shaft body 6 is expanded outward and crushed, cracks are likely to occur from the tip opening edge, and as a result, the crushed tip opening edge becomes like a plurality of petals. The fitting member 1 and the exterior member 4 were sometimes separated unexpectedly.

Therefore, while reducing the diameter of the tip opening edge of the cylindrical shaft body 6 radially inward, the intermediate portion of the cylindrical shaft body 6 located between the tip opening edge and the through hole 3 is reduced in the radial direction. There was a need to improve the jig in order to obtain a hook-fastening structure that does not cause cracks at the tip opening edge and has excellent locking force.

The present invention provides a hooking jig that is improved in this respect.

An example of the present invention will be described based on the drawings.
FIG. 1 shows parts for constructing a pair of synthetic resin hooks, 1 and 1 are fitting members, and one fitting member 1 has a cylindrical male fitting part 2.
a and a through hole 3 located in the center thereof are integrally molded, and the other fitting member 1 has a cylindrical female fitting part 2.
b and the through hole 3 located at the center thereof are integrally molded. 4 and 4 are exterior and mounting members made of acetal resin, respectively, and each has a small hole 5, 5 with an outer diameter that can be inserted into the through hole 3, 3, and in which only the tip is opened in the shaft core. Cylindrical shaft bodies 6, 6 are integrally molded at the center of one side.

Figure 2 shows the male side fitting member 1 and the mounting member 4.
are attached to one side of a suitable membrane base material A such as cloth or a resin sheet to create a male hook, and the female side fitting member 1 and attachment member 4 are attached to the other side of the membrane base material A. The figure shows a state in which the male fitting part 2a and the female fitting part 2b are fitted together to form a female hook.

The fitting member 1 and the exterior member 4 are shown in FIG.
As shown in B, C, and D, with the cylindrical shaft body 6 penetrating the membrane base material A, the through hole 3 of the fitting member 1 is
The tip opening edge of the portion protruding from the through hole 3 of the cylindrical shaft body 6 is a conical recess as an example of a concave recess formed in the center of the tip of the jig 7. 8 and press the jig 7 in the axial direction of the cylindrical shaft body 6, thereby reducing the diameter of the tip opening edge inward toward the cylindrical axis side.
By crushing the cylindrical shaft portion located between the tip opening edge and the through hole 3 so as to bulge outward, and engaging this crushed portion with the peripheral edge of the through hole 3, they are integrated with each other. and is attached to the membrane-like base material A.

The mounting structure of the male hook is also the same as that of the female hook, so illustrations and explanations thereof will be omitted.

In short, the hook fixing jig of the present invention has a concave portion 8 in the center of its tip that guides the opening edge of the tip end of the cylindrical shaft body 6 to the inner side of the cylindrical shaft core to reduce its diameter. It is characterized by being formed.

Therefore, by fitting and pressing the tip opening edge of the cylindrical shaft body 6 into the concave recess 8 formed at the center of the tip of the jig 7, it serves as a guide for shrinking the tip opening edge. , the air inside the cylinder shaft can be crushed without escaping to the outside, the middle part of the cylinder shaft can easily bulge outward, and the hook mounting structure has a strong locking force that is less likely to cause cracks. Finally, it was possible to form a simple cylinder.

[Brief explanation of drawings]

The drawings show an embodiment of the hook attachment jig according to the present invention, and FIG. 1 is a perspective view of the hook component parts, FIG. 2 is a cross-sectional view showing the hook attached state, and FIGS. D is a sectional view showing the hook attachment procedure, and FIG. 4 is a sectional view showing a conventional example. DESCRIPTION OF SYMBOLS 1... Fitting member, 3... Through hole, 4... Mounting member, 6... Cylindrical shaft body, 7... Jig, 8... Recessed part, A... Membrane base material.

Claims (1)

[Scope of utility model registration request] In order to integrate the fitting member 1 having a through hole 3 in the center and the synthetic resin mounting member 4 having a cylindrical shaft body 6 with an open end by sandwiching the membrane base material A, In the jig for attaching a hook, which crushes the portion of the cylindrical shaft body 6 inserted into the through hole 3 with the membranous base material A penetrated therethrough, which protrudes from the through hole 3, at the center of the tip thereof, A hooking jig characterized in that a concave portion 8 in the shape of a recess is formed to guide the opening edge of the distal end of the cylindrical shaft body 6 to the inner side of the cylindrical shaft core so as to reduce its diameter.