JPS5839521B2 - Walnut button - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a covered button used as a fastener for tightening cloth and leather covered parts of furniture such as sofas, beds and chairs, and for tightening cloth and leather covered parts in interior decoration such as wall quilting.

Generally, for this type of covered button, the covering material is placed over the upper core body, and the peripheral end of the covering material is folded into the opening on the lower surface of the upper core body.
This is fixed by a lower core that is press-fitted into the upper core from an opening on the lower surface, so that a tensioned state can be obtained.

Conventional covered buttons with such a structure include those with a threading hole formed in the lower core and those with fixed leg rods protruding from the upper or lower core.In the former, Thick thread or leather cord, etc., passed through the threading hole is pierced through the back side of the workpiece using a needle, passed roughly through the back side or through the stopper, and then tightened and fixed.

In the latter case, the leg rod is pierced from the front side of the workpiece to the back side, inserted through the stopper, and then fixed in a clamped state.

In conventional covered buttons with such a structure, when the upper core of the covering material that is exposed on the surface of the workpiece and the lower core that is fitted and fixed to this and are integrated, become thread-like when turned. This results in cuts and twisted leg rods, which have to be sent for repair.

In view of this, it is an object of the present invention to provide a covered button in which there is no risk of the connecting tools such as threads, strings or pins breaking no matter how it is turned, and there is no risk of disassembly due to detachment of the upper core. .

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal cross-sectional view of the covered button of the present invention in an assembled state, in which the peripheral end portion of the covering material 2 covered with the upper core body 1 is folded and press-fitted into the opening 3 on the lower surface of the upper core body 1. The lower core body 4 is kept in tension by being fixed by caulking the opening edge of the upper core body 1, and at the same time, the upper and lower core bodies 1 and 4 are joined together.

In the upper core body 1 having the above structure, as shown in the exploded perspective view in FIG. It is formed by the establishment.

On the other hand, the lower core body 4 has a tubular projection 8 into which the projection 7 is inserted.
is formed upward from the center.

This protrusion 8 has an enlarged opening end 8a that comes into contact with the back surface 5a of the recessed stepped portion 5 of the protrusion 7.

The protrusion 8 resists the load when the opening edge of the upper core body 1 is caulked with the enlarged opening end of θ in contact with the back surface 5a of the recessed step portion 5.

The rotatable leg rod 9, which is a feature of the present invention, has the above-mentioned concave stepped portion 5.
It consists of a head part 10 and a leg part 11 that fit inside.

The leg portion 11 has a cylindrical portion 11A having a height such that the lower end thereof faces the lower end of the protrusion 7 when the head 10 is inserted into the recessed stepped portion 5, a left and right width slightly longer than the diameter of the cylindrical portion 11A, and a cylindrical portion 1.
Approximately 2/3 of the diameter of 1A is the flat part 11B with any front and rear width.
Near the lower end of the flat part 11B, a locking tool having a hole 12 for passing a thread or string or a hook such as a pin is provided.

On the other hand, the lower end of the projection 7 forming the shaft through hole 6 is narrowed so that the inner diameter of the lower end corresponds to the horizontal diagonal length of the flat part 11B of the leg rod 9.

To attach the leg rod 9 to the upper core 1 having the above structure, as shown in FIG. 1 and placed upside down on a metal pedestal 13, and push down a punch 14 having an inner diameter approximately parallel to the inner diameter of the shaft hole 6, thereby slightly reducing the diameter of the protrusion 7. .

As shown in FIG. 4, the projection 7 whose diameter is reduced in this way is
Initially, the outer diameter of the imaginary line is reduced to a solid line in at least the lower half, so that the narrowed lower edge approaches the outer circumferential surface of the cylindrical part 11A, and the cylindrical part 11
It fits into the lower part of the step formed by A and the upper end of the diagonal line on the cut surface of the flat part 11B, and is supported so that it can only rotate freely without pulling out the leg rod 9.

The upper core body 1 to which the leg rods 9 are attached as described above is
As shown in FIGS. 4 and 5, the flat portion 11B of the leg rod 9 is a member that protrudes from the lower end of the projection 7.

Since the present invention has the above-mentioned configuration, the covering material 2 is placed over the upper core body 1 to which the leg rods 9 are attached, and the peripheral portion of this covering material is pushed into the upper core body 1 by press-fitting the lower core body 4. The upper core body 1 is assembled into one piece by caulking by constricting the lower edge portion to form a product covered button.

In the product covered button of the present invention, the leg rod 9 attached to the upper core body 1 rotates freely, so when it is used for tightening the cloth and leather upholstery of furniture such as a sofa, for example, the button is exposed on the surface. Even if the upper core body 1 covered with the covering material 2 is turned, there is no risk that the threads or strings connecting it to the back side (not shown) on the back side will be twisted and broken.

Further, the leg rod 9 located at the center of the upper core 1 resists the axial load applied to the upper core 1 and prevents the upper core 1 from being crushed.

Furthermore, in the unlikely event that the connection between the upper core body 1 and the lower core body 4 becomes loose, or even if they come off, the leg rod 9 whose head 10 is fitted into the concave stepped portion 5 of the upper core body Since the front and back sides are tied together with thread or string, there is no risk of it disintegrating and scattering.

As is clear from the above description, the covered button of the present invention has high pressure resistance and is robust, and there is no risk of the thread twisting or breaking during use, and unless the thread breaks, it will not disassemble and fall off. It is possible to obtain excellent practical effects.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing one embodiment of the covered button of the present invention, Fig. 2 is an exploded perspective view of the upper and lower core bodies and leg rods, and Fig. 3 is an enlarged view illustrating assembly of the leg rods to the upper core body. FIG. 4 is an enlarged longitudinal sectional view of the leg rod attachment portion, and FIG. 5 is an enlarged bottom view of the upper core body to which the leg rod is attached. 1... Upper core body, 2... Covering material, 3.
...Opening, 4...Lower core, 5...
...Concave stepped portion, 6...Shaft through hole, 7, 8...
... Tubular process, 9 ... Leg rod, 10 ...
...Head, 11...Leg, 11a...
Cylindrical part, 11b... Flat part, 12...
A thread or string threader.

Claims (1)

[Claims] 1. Cover the upper surface of the upper core which has an opening on the lower surface with a covering material, fold the peripheral end of this covering material inward from the lower edge of the upper core, and insert this peripheral end into the opening on the lower surface of the upper core. In the case of a covered button that is held in place by a lower core body that fits into the upper core body, a shaft hole with a recessed step for supporting the leg rod is formed in the center of the upper core body, and a leg rod is formed in the center of the lower core body. A hole through which the rod passes and a tubular protrusion extending from the periphery of the hole are provided, and the tubular protrusion provided on the lower core body is brought into contact with the concave stepped portion of the upper core body,
Furthermore, the covered button is characterized in that a headed leg rod is rotatably inserted and fixed into the shaft hole of the upper core.