JP6339808B2 - Fixture leg cap - Google Patents

Description

  The present invention relates to a cap that is used by being fitted to a lower end portion of a leg of furniture (furniture) such as a table or a chair, that is, a leg cap for furniture.

  Leg caps are known that are used by covering the tips of furniture legs such as chair legs and table table legs. These leg caps are used to protect the floor and leg tips from being dragged by a chair or the like, or to prevent slipping so that they cannot be moved easily. It is attached to. There are various types of furniture with legs, such as desks such as study desks and conference desks, beds, and magazine racks.

  An example of such a leg cap is disclosed in Patent Document 1, in which a sheet-like ground member (12) is bonded to the bottom surface of the cap for floor surface protection.

  However, with the leg cap with the grounding member attached to the lower surface, there are many problems that the grounding member is repeatedly rubbed, that is, the grounding member is peeled off or peeled off or torn off over time during normal use. It was the actual situation.

JP 2008-017901 A

  The object of the present invention is to provide a leg cap for a fixture that has been improved to a state in which durability and reliability are substantially improved by making a grounding member less likely to be peeled off compared to conventional products by structural contrivance based on earnest research. There is in point to do.

The invention according to claim 1 is a leg cap for furniture,
A bottomed cylindrical cap body 1 capable of receiving a leg tip 4a of furniture;
A grounding member 2 provided on the cap body 1 in a state of covering the bottom surface 1b and the side peripheral surface 9 of the cap body 1,
The cylindrical cap upper part 3 that is fitted to the side circumferential wall 5 and the side circumferential surface 9 that are surrounded by the side circumferential surface 9 of the grounding member 2 and that can be fitted to the leg tip 4 of furniture. And having
A concave / convex fitting portion 10 is provided by fitting a convex portion 1t formed on one of the cap body 1 and the cap upper portion 3 and a concave portion 3c formed on either one of the cap main body 1 and the cap upper portion 3,
The cap upper part 3 has a lower end peripheral wall part 8 that surrounds the side peripheral wall part 5 in a state in which the diameter becomes smaller toward the lower side .

The invention according to claim 2 is the leg cap for furniture according to claim 1,
The cap upper part 3 is made of an elastomer, and the cap main body 1 is made of an elastomer having the same quality as the elastomer of the cap upper part 3 and having a hard hardness.

The invention according to claim 3 is the leg cap for furniture according to claim 1 or 2,
The cap upper part 3 is integrated with the cap main body 1 in a state where the grounding member 2 is provided .

According to invention of Claim 1, the side peripheral wall part of the grounding member currently formed in the three-dimensional thing covering the bottom face and side peripheral surface of a cap main body is clamped and supported by the cap main body and the cap upper part. Therefore, since the grounding member is supported in a state in which the upper end, which is the open end, is firmly sandwiched by the sandwich structure, a strong or heavy drag force is applied to the grounding member, and even if these forces are repeated, the grounding member Is difficult to peel off and has been improved so that it does not peel off early.
As a result, it is possible to provide an appliance leg cap that is improved in a state in which durability and reliability are substantially improved so that the grounding member is less likely to be peeled compared to the conventional product.

According to the first aspect of the present invention, the convex and concave portions that are fitted to each other are provided with the concave-convex fitting portion formed by distributing the cap main body and the cap upper portion, so that the contact area is not increased. There is an advantage that the integrated strength between the cap body and the cap upper portion is reinforced.

  According to the second aspect of the present invention, the cap body is made of a hard elastomer and is rich in strength and rigidity, and can withstand the load and drag force of furniture and its action. And the upper part of the cap that covers the legs of the furniture is made of a soft elastomer, and can be configured as a preferred leg cap that is elastic and can be elastically fitted to legs of various diameters. .

According to the invention of claim 3, since the upper part of the cap is integrated with the cap main body provided with the grounding member, compared with the case where the three parts of the cap main body, the upper part of the cap and the grounding member are integrated separately. Thus, there is an advantage that a solid integration means in which the side peripheral wall portion of the grounding member is firmly sandwiched between the cap upper portion and the cap body can be obtained while being easy to produce.

Front view of leg cap (A) Top view of leg cap, (b) Bottom view of leg cap Cross section of leg cap Exploded perspective view showing the structure of the leg cap Sectional drawing of the principal part which shows the uneven | corrugated fitting structure of a cap main body and a cap upper part

  Embodiments of a leg cap for furniture according to the present invention will be described below with reference to the drawings. Hereinafter, for the sake of simplicity, the fixture leg cap is basically referred to as a “leg cap”.

Embodiment 1
A leg cap A according to the present invention is shown in FIGS. The leg cap A includes three parts: a hard elastomer cap body 1, a grounding member 2 provided on the lower side of the cap body 1, and a soft elastomer cap upper part 3 provided on the upper side of the cap body 1. It is comprised by integrating. The leg cap A according to the first embodiment is formed in the shape of a rotating body having an axis P, and has a circular shape when viewed in the direction of the axis P.
FIG. 1 shows an example of how the leg cap A is used. The grounding member 2 is grounded to the floor F by being loaded on a leg L of furniture.

As shown in FIGS. 1, 3, and 4, the cap main body 1 is a bottomed cylindrical elastomer body having a main body bottom wall 1A and a main body side peripheral wall 1B.
The relatively thick main body bottom wall 1A includes a receiving surface 1c that can receive the leg tip 4a of the leg L of the furniture, and a bottom surface 1b that is a lower attaching surface provided by attaching the grounding member 2. .
The main body side peripheral wall 1B has a lower side peripheral surface 1d that is a surface on which the grounding member 2 is installed and fixed, and an upper side peripheral surface 1e that is an inclined surface that has an angle that increases in diameter toward the lower side. Surface 9), an inner peripheral surface 1a, and an annular upper surface 1f having a narrow width connected to the upper peripheral surface 1e and the inner peripheral surface 1a.

As an example, the diameter of the lower end of the upper peripheral surface 1e is set to a value obtained by adding twice the thickness of the grounding member 2 to the diameter of the upper end of the lower peripheral surface 1d.
In addition, the main body side peripheral wall 1B is formed with a pair of convex portions 1t and 1t which are projecting portions protruding upward at positions symmetrical with respect to the axis P. The inner surface of the convex portion 1t is flush with the inner peripheral surface 1a.

  As shown in FIGS. 1 to 4, the grounding member 2 is made of felt formed in a substantially bowl shape (or a bottomed cylindrical shape). The grounding member 2 made of felt includes a side peripheral wall portion 5 that is externally mounted on the lower side peripheral surface 1d of the main body side peripheral wall 1B, a bottom surface portion 6 that is externally mounted on the bottom surface 1b of the main body bottom wall 1A, and these side peripheral wall portions 5. And a curved surface portion 7 that connects the bottom surface portion 6 to each other. The grounding member 2 is adhered (adhered) in a state of surrounding the cap body 1 using an adhesive or the like.

As shown in FIGS. 1 to 5, the cap upper portion 3 has a relatively small diameter constricted upper portion 3 </ b> B and a generally constricted upper portion 3 </ b> B so as to be tightly fitted to the leg tip portion 4 of the leg L of the furniture. It is comprised in the cylindrical body of the lower expansion shape which has 3 A of upper main bodies with a larger diameter. The cap upper portion 3 is made of an elastomer which is the same material as the elastomer of the cap body 1 but has a high hardness.
The upper main body 3A is formed with an upper peripheral surface 1e of the cap main body 1, an inclined inner peripheral surface 3a that is a surface surrounding the annular upper surface 1f, and an annular bottom surface 3b, and the convex portion 1t is fitted inside. A recess 3c, which is an internal fitting portion that is recessed and formed, is provided.
Further, the upper main body 3A has a lower peripheral wall portion 8 that surrounds the side peripheral wall portion 5 of the grounding member 2 in a state where the upper main body 3A becomes thinner toward the lower side. The upper peripheral surface 1e and the lower peripheral surface 1d are collectively referred to as a side peripheral surface 9.

  In short, the leg cap A is provided on the bottomed cylindrical cap body 1 having a receiving surface 1c capable of receiving the leg tip 4a of the leg L of the furniture, and on the bottom surface 1b and the lower peripheral surface 1d of the cap body 1. It fits over the grounding member 2 provided on the cap body 1 in a state of covering, the side peripheral wall 5 surrounded by the lower side circumferential surface 1d of the cap body 1 of the grounding member 2 and the upper side circumferential surface 1e of the cap body 1 And a cylindrical cap upper part 3 that can be fitted to the leg tip 4 of the leg L of the furniture.

An example of a method for producing the leg cap A is as follows. First, a grounding member 2 made of felt is placed in a mold, and then a hard elastomer resin is injected into the mold to perform insert molding for molding the cap body 1. Next, after the cap body 1 integrated with the grounding member 2 is installed in the mold, insert molding is performed in which a soft elastomer resin is injected to mold the cap upper portion 3.
By so-called two-stage insert molding, it is possible to form a strong leg cap A in which the cap body 1, the grounding member 2, and the cap upper part 3 are firmly integrated.

The cap upper part 3 is made of soft rubber, the cap body 1 is made of hard rubber, the above two-stage insert molding is performed, and the grounding member 2 is vulcanized and bonded to the cap body 1 by vulcanization by subsequent heat treatment. Thus, a leg cap A in which three parts (cap body 1, grounding member 2, cap upper part 3) are integrated may be formed.
Further, a method of attaching the grounding member 2 to the cap body 1 previously formed using an adhesive or the like and then insert-molding the cap upper portion 3 is possible, or other manufacturing methods are also possible.

  As shown in FIGS. 3 and 5, the leg cap A configured as described above is configured such that the grounding member 2 formed in a three-dimensional shape has a side peripheral wall portion 5 formed of a cap body 1 and a cap upper portion 3. In other words, it is tightly integrated. Therefore, even if it is attached to the legs L of furniture and repeatedly dragged, durability that can be maintained for a long time is exhibited without inconvenience of peeling off at an early stage.

In the case of a conventional structure in which a grounding member made of felt, plastic, rubber or the like is simply pasted on a flat bottom surface, there is a disadvantage that the grounding member peels off or tears relatively easily or early due to external force such as dragging. It was happening.
On the other hand, in the leg cap A of the present invention adopting a structure in which the side peripheral wall portion 5 that is the upper part of the grounding member 2 formed in a three-dimensional shape is sandwiched and supported, strong or heavy drag, or they are Even if it repeats, the grounding member 2 becomes difficult to peel off, and it is improved so that it cannot peel off early.

The cap body 1 and the cap upper portion 3 are tightly integrated with each other because the cap body 1 and the cap upper portion 3 are tightly covered inside and outside, and also have a concave / convex fitting portion 10 by the convex portion 1t and the concave portion 3c, and the contact area is increased. Has been. That is, the uneven fitting part 10 which reinforces the integrated strength of the cap main body 1 and the cap upper part 3 is provided.
And since the cap main body 1 is made of a hard elastomer and is rich in strength and rigidity, it can withstand the load of furniture (furniture), drag force and its action. The cap upper portion 3 that covers the legs L of furniture (furniture) is made of a soft elastomer, and is made of a material that is elastic (elastic) and can be elastically fitted to legs of various diameters.

  Moreover, since the cap upper part 3 is integrated with the cap main body 1 in a state in which the grounding member 2 is provided, the three parts of the cap upper part 3, the grounding member 2 and the cap main body 1 are integrated at once. Compared to the above, the cap upper portion 3 and the cap body 1 can be easily integrated, and the side peripheral wall portion 5 of the grounding member 2 can be firmly sandwiched between the cap upper portion 3 and the cap body 1. It is an excellent one.

[Another embodiment]
The shape of the leg cap A can be variously changed such that the bottom surface 1b of the cap body 1 is spherical and the bottom surface portion 6 of the grounding member 2 is also spherical.
As in the case of this spherical shape, “the state covering the bottom surface 1b and the side peripheral surface 9 of the cap body 1” means that the bottom surface 1b and the side peripheral surface 9 (lower side peripheral surface 1d) are continuous without any boundary. It also includes the state of covering the shape.

Elastomer (elastomer resin) is a general term for polymer materials having large elasticity (flexibility) at room temperature, TPE (Thermo-Plastic Elastomer), TPR (Thermo-Plastic Rubber), rubber, synthetic rubber, EPDM, Various other materials can be used.
The cap body 1, the cap upper part 3, and the grounding member 2 can be variously changed, and the cap upper part 3 has a convex part 1 t and the cap main part 1 has a concave part 3 c. The joint 10 may be used.

DESCRIPTION OF SYMBOLS 1 Cap main body 1b Bottom face 1t Convex part 2 Grounding member 3 Cap upper part 3c Concave part 4 Leg tip part 4a Leg tip 5 Side peripheral wall part
8 Lower peripheral wall portion 9 Side peripheral surface 10 Concave / concave fitting portion

Claims (3)

A bottomed cylindrical cap body capable of receiving the leg ends of furniture;
A grounding member provided on the cap body in a state of covering the bottom surface and side peripheral surface of the cap body;
Is fitted to the side wall portion and the side peripheral surface is the outer circumference on the side circumferential surface of the ground member, and has the leg tip of the furniture and a tubular cap top capable fitted, the Become
An uneven fitting part is provided by fitting a convex part formed on one of the cap main body and the cap upper part and a concave part formed on either of the other,
The upper part of the cap has a lower end peripheral wall part surrounded by the side peripheral wall part in a state in which the diameter becomes smaller toward the lower side .   The appliance leg cap according to claim 1, wherein the upper part of the cap is made of an elastomer, and the cap body is made of an elastomer having the same quality as the elastomer of the upper part of the cap and having a hard hardness. The appliance leg cap according to claim 1 or 2, wherein the cap upper portion is integrated with the cap body in a state where the grounding member is provided .

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