JPH0225049Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a leg body for a home kotatsu.

Conventionally, the legs for a home kotatsu have either been made of wood with a male threaded metal rod protruding upward from the center of the upper end surface, or the legs have been integrally implanted with the threaded rod by injection molding. Although those made of fixed plastic are used, for furniture-style home kotatsu, thick, sturdy, prismatic legs are preferred in order to give a sense of solidity. However, with such a large leg body, the mold for molding also becomes large, and it is necessary to hold the male threaded metal rod (or nut member) in the mold in advance and then mold it, and the mold The problem arises that the process becomes complicated and its lifespan is shortened. It is also necessary to increase the connection strength with the top plate.

This invention solves these problems,
To provide a leg for a home kotatsu that simplifies and extends the life of a large leg, has a high connection strength with a top plate, and has an improved aesthetic appearance as a piece of furniture.

Therefore, the features of the present invention include a plastic cylindrical base body that has an upper wall, is open at the lower end, and is integrally molded in a tapered shape that expands downward, and a metal nut member that is horizontally connected to the body. an inner holder made of plastic that is inserted from the lower end opening of the script body and fixed on the upper wall side, and a lower end that closes the lower end opening of the script body; a cap body, a mounting hole corresponding to the screw hole of the nut member and an engagement window portion corresponding to the locking piece are provided through a part of the upper peripheral wall of the base body; An elastic member that comes into contact with the inner holder is attached to the inner holder in an upwardly projecting manner, and an escape hole for the elastic member is provided in the upper wall of the script body.

Hereinafter, the present invention will be explained in detail based on drawings showing embodiments.

In Figure 1, Figure 2, Figure 3, and Figure 4, 1
The script body is made of plastic and has a rectangular cylindrical shape, has an upper wall 1a, is open at the lower end, and is integrally molded in a tapered shape that widens downward. Furthermore, one corner of the outer circumferential wall on the upper wall 1a side of the script body 1 is formed into a stepped portion 2 having a predetermined length A from the upper end, and the back side of the bottom wall 3 of the stepped portion 2 (leg One inclined rib 25 continuous from the inner surface of the vertical wall 4 is integrally molded on the inside of the main body 1.

Reference numeral 5 denotes an inner holder made of plastic and has a planar shape that can be fitted into the inner periphery of the stepped portion 2 of the script body 1. That is, it has four side walls 7 corresponding to the inner surfaces of the three corner portions 6, 6, 6 of the script body 1, and one side wall 8 corresponding to the inner surface of the vertical wall 4 of the stepped portion 2. The inner holder 5 horizontally includes a metal cylindrical nut member 9 with a screw hole 9a opened in the side wall 8 on the side corresponding to the stepped portion 2. It is embedded as one piece when molding No. 5. Furthermore, the inner holder 5 has a stepped portion 2.
It has a locking piece 10 that protrudes downward flush from the side wall 8 on the corresponding side, and a locking protrusion 11 is provided on the locking piece 10 in a protruding manner. Further, a recess 14 having a circular shape in plan view is formed in the upper part of the inner holder 5 for attaching an elastic member 13 that comes into contact with the lower surface of the kotatsu top plate 12. The elastic member 13 is made of rubber, plastic, or the like, has a circular plan view, can be fitted into the recess 14, and is attached by screws 15 or fixing means such as adhesive or fitting.

Thus, when the inner holder 5 is in the upper insertion position of the script body 1 as shown in FIG. Rectangular engagement window 1 corresponding to
7 are respectively provided through the vertical wall 4 of the stepped portion 2, and an escape hole 18 through which the elastic member 13 is inserted is provided in the upper wall 1.
It is penetrated at a position corresponding to a. The elastic member 13 has a height such that it protrudes a little from the outer surface of the upper wall 1a when the inner holder 5 is in contact with the inner surface of the upper wall 1a of the script body 1.

19 is a plastic integrally molded lower cap body that closes the lower end opening 1b of the script body 1;
b is fitted and fixed inside. Reference numeral 20 indicates a side frame of the kotatsu top plate 12, and reference numeral 21 indicates a screen mounting fixture which is bridge-disposed near the corner of the side frame 20 with fixing tools 22, 22 such as screws.

In the above configuration, the inner holder 5 is inserted into the script body 1 from the lower end opening 1b along the tapered inner peripheral surface to the upper wall 1a, and in this insertion position, the locking protrusion 11 of the locking piece 10 is fixed to the script body 1 by engaging with the engagement window portion 17 of the vertical wall 4 of the stepped portion 2. Note that when inserting the inner holder 5, the locking piece 10
The locking protrusion 11 comes into contact with the inclined rib 25, and further pushing of the inner holder 5 causes the locking piece 10 to be elastically deformed. With this deformation, the locking protrusion 11 smoothly moves from the top of the inclined rib 25 to the inner surface of the vertical wall 4 and fits into the engagement window 17 . That is, the locking protrusion 1 is connected to the inner corner of the stepped portion 2 by the inclined rib 25.
1 is prevented from getting caught. In addition, the inner holder 5
If it is inserted while it is still hot after molding the script body 1,
The inner holder 5 is preferably fixed to the inner surface of the script body 1 in a tight fit due to contraction due to heat dissipation of the script body 1.

In this way, the script 23, which has the inner holder 5 fixed inside the script body 1 and the lower cap body 19 attached to the lower end opening 1b, is attached to the bottom corner of the kotatsu top plate 12 as shown in FIG. Installed. That is, insert the upper stepped part 2 toward the center of the top plate 12 from below into the corner part of the side frame 20 to which the fixture 21 is attached, and insert the screw 26 into the nut member 9 through the hole 24 of the fixture 21. The leg body 23 is fixed by screwing it into the screw hole 9a and tightening it. In this attached state, the legs 23 and the top plate 12 are in a resilient state due to the elastic member 13, and unnecessary rattling is prevented.

The locking piece 10 is elastically deformable in the shape of a leaf spring and has a locking protrusion 11 on the outer surface side.
This locking protrusion 11 is provided on a part of the upper peripheral wall of the script body 1.
An engagement window 17 is provided through the engagement window 17 to correspond to the above, and when the inner holder 5 is inserted through the lower end opening 1b of the script body 1, the locking piece 10 is subjected to a leaf spring-like urging force. Therefore, it is elastically restored outward at the position of the engagement window 17, and the locking protrusion 11 is locked to the engagement window 17. That is, the inner holder 5 can be attached to the inside of the script body 1 with one touch.

In addition, the elastic member 13 comes into contact with the lower surface of the top plate 12 and is elastically compressed, but the escape hole 18 provided through the upper wall 1a
The dimensions of the top plate 12 are sufficiently large to accommodate the volume of the elastic member 13 in the compressed state, and the lower surface of the top plate 12 is always elastically biased upward by the elastic member 13. The body 23 and the top plate 12 are less likely to rattle each other.

[Effect of idea]

The present invention has the following significant effects with the above-described configuration.

A metal nut member 9 and an elastic member 13,
Since it is provided in the inner holder 5, the shape of the script body 1 can be simplified, making it easier to manufacture a large and expensive mold for molding the script body, and improving the durability of the mold.

Since the upper wall 1a of the script body 1 is integrally molded, the appearance of the upper end portion is improved, the strength of the upper end portion is improved, and the connection strength with the top plate 12 is also increased.

When the inner holder 5 is installed into the script body 1, the locking piece 10 is elastically deformed like a leaf spring and elastically restored outward at the position of the engagement window 17, so that the locking piece 10 Since the locking protrusion 11 locks into the engagement window 17 and can be fixed with one touch, the workability of assembly is good.

The elastic member 13 of the small part is attached to the inner holder 5 of the small part.
The installation work is easy because it can be installed on the Moreover, the attached elastic member 13 penetrates through the escape hole 18 of the top wall 1a and protrudes upward, so that the top plate 1
2 elastically supports the lower surface, and the top plate 12 and the script body 1
to prevent mutual rattling. Furthermore, the dimensions of the escape hole 18 can accommodate the volume of the elastic member 13 compressed by contacting the lower surface of the top plate 12, thereby preventing the elastic member 13 from being excessively compressed and destroyed.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 2 is a plan view, Fig. 3 is a sectional view taken along the line X-X in Fig. 1, and Fig. 4 is an external perspective view of the upper part of the leg. It is. 1...Script font, 1a...Top wall, 1b...Bottom end,
5... Inner holder, 9... Nut member, 9a... Screw hole, 10... Locking piece, 12... Top plate, 13...
Elastic member, 16... Attachment hole, 17... Engagement window section,
18...Escape hole, 19...Lower cap body.

Claims (1)

[Scope of utility model registration request] A cylindrical base body 1 made of plastic integrally molded in a tapered shape that has an upper wall 1a, is open at the lower end, and expands downward, and a nut member 9 made of metal is horizontally held inside and locked. an inner holder 5 made of plastic having a piece 10 inserted into the script body 1 from the lower end opening 1b and fixed on the upper wall 1a side; and a lower cap body that closes the lower end opening 1b of the script body 1. 19, the locking piece 10 is elastically deformable in the shape of a leaf spring and has a locking protrusion 11 on the outer surface side, and a mounting hole 16 corresponding to the screw hole 9a of the nut member 9 and the above-mentioned Locking piece 10
An engagement window 17 corresponding to the locking protrusion 11 is provided through a part of the upper circumferential wall of the script body 1, and an elastic member 13 that abuts the lower surface of the top plate 12 is inserted upward into the inner holder 5. In addition to being attached in a protruding manner, an escape hole 18 for the elastic member 13 is provided in the upper wall 1a of the script body 1, and the dimensions of the escape hole 18 are set so that the elastic member 13 comes into contact with the lower surface of the top plate 12. The legs for a home kotatsu are set to a size that accommodates the volume in a compressed state.