JPH0120576Y2 - - Google Patents

Description

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

Conventionally, the legs for a home kotatsu have either been made of wood with a male metal threaded rod protruding upward from the center of the upper end surface, or made of plastic with the threaded rod integrally implanted and fixed by injection molding. However, for example, in furniture-style home kotatsu, large-diameter, sturdy prismatic legs are preferred in order to create a sense of solidity. Therefore, the mold for plastic molding becomes large, and it is necessary to hold the metal male threaded rod (or nut member) in the mold beforehand and mold it afterwards, making the mold even more complex and large, and shortening its lifespan. There was a problem with it being short.

The present invention was developed in view of the current situation, and aims to provide legs for a home kotatsu that simplify the mold, extend its life, and have high mounting strength. Therefore, the feature of the present invention is that a plastic upper cap body in which a metal nut member is integrally embedded is fitted into the upper end of a plastic base body as an internal shape, and , a screw hole of the nut member is opened in the horizontal direction, and a mounting hole is formed through a part of the upper peripheral wall of the script body corresponding to the screw hole, and is further formed with a side frame of the kotatsu top plate. a hole of a fixture fixed in the vicinity of a corner portion to be attached, and a bolt member inserted into the mounting hole in a skewer-like manner, and removably screwed into the nut member,
The screen base body is configured to be detachably attached to the top plate via the upper cap body and the attachment tool.

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

In Figs. 1 to 4, reference numeral 1 denotes a platform body for a home kotatsu, which has a prismatic shape with a hollow part 2 made of plastic. A protrusion 4 for fitting and supporting the upper cap body 3 is provided on the inner circumferential wall near the upper end of the script body 1 to project inward, and the protrusion position is approximately equal to the height of the circumferential wall of the upper cap body 3 from the upper end. They are assumed to be at the same height. In other words, upper cap font 3 is script font 1.
It is fitted into the upper end part as an inner part, and in the fitted state, the upper surface 14 of the upper cap body 3 and the upper end of the outer circumferential wall of the script body 1 are approximately at the same height. 5 is script font 1
This is a stepped part formed by cutting out a corner part of the outer circumferential wall from the upper end thereof to a substantially corresponding part of the protrusion 4, and this stepped part 5 includes an inner part of the upper cap body 3 at the upper end of the base body 1. In order to fix the script body 1 at a predetermined position on the lower surface of the kotatsu top plate in a fitted and fixed state, a mounting hole 7 is provided through which a bolt member 6 is inserted.

The upper cap body 3 fitted from the upper end opening of the script body 1 has a rectangular tube shape with an upper surface portion 14, has a notch portion 8 corresponding to the stepped portion 5, and further has a cutout portion 8 corresponding to the stepped portion 5. The outer dimensions of the cap body 3 are set to be slightly smaller than the inner dimensions of the script body 1.
Reference numerals 9 denote a plurality of ribs protruding inwardly within the cap body 3, and the ribs 9 protrude from approximately the center of the four inner walls in the front, back, right and left directions, and extend from the notch 8 in the radial direction, that is, in the hollow. A boss portion 23 protruding toward substantially the center of the portion is held by the inward end edge of each of the ribs 9. A nut member 11 into which the bolt member 6 is screwed so as to be freely advanced and retracted is integrally embedded in the hole 10 of the boss portion 23 by injection molding.
At this time, if an uneven portion (not shown) is formed on the entire outer peripheral surface of the nut member 11, the nut member 11 can be more firmly integrated.

Reference numeral 12 denotes a recess into which an elastic member 13 such as rubber or plastic is fitted, and the recess 12 is formed by recessing the upper surface portion 14 of the upper cap body 3 so as to be disposed at a position substantially directly above the boss portion 23. It will be done. Specifically, the recess 12 is formed in a long groove shape, and the bottom surface 15
A pair of protrusions 16, 16 are provided in a protruding manner. Then, the elastic member 13, which is set to have substantially the same dimensions as the recess 12, is attached to the upper surface portion 14 of the upper cap body 3.
The elastic member 13 is fitted into the recess 12 so as to slightly protrude from the recess 12, and the elastic member 13 is received and supported by the protrusions 16, 16 in the form of a barb. Due to the intervention of the elastic member 13, the upper edge of the script body 1, that is, the upper surface portion 14 of the upper cap body 3, comes into contact with the lower surface of the kotatsu top plate 18 in a resilient manner, thereby preventing unnecessary rattling. The bottom surface 15 of the recess 12 constitutes the upper half of the boss portion 23 into which the nut member 11 is inserted, and its wall thickness is approximately the same as that of the lower half of the boss portion 23. Set to the same dimensions. Therefore, since the boss portion 23 has a cylindrical shape with a substantially uniform wall thickness, it is easy to mold plastic, and an accurate shape and size without distortion can be obtained.

Reference numeral 17 denotes a lower cap body that fits into the lower edge of the script body 1 and closes the hollow part 2.

To attach the script body 1 to a predetermined position on the lower surface of the kotatsu top plate 18, open the upper end of the script body 1 so that the outer surface of the notch 8 of the upper cap body 3 comes into contact with the inner surface of the stepped part 5 of the script body 1. The upper cap body 3 is fitted into the upper cap body 3, and the mounting hole 7 of the script body 1 communicates with a nut member 11 fixed in the hole portion 10 in a radial direction from the outer circumferential wall of the upper cap body 3. An elastic member 13 is fitted into the recess 12 of the upper bottom portion 14 of the upper cap 3. Next, as shown by the imaginary line in FIG. 2, the upper end of the script body 1 is placed at the lower corner of the kotatsu top plate 18. Specifically, the stepped portion 5 of the script body 1
is directed inward toward the center of the top plate 18, and the outer peripheral wall of the upper end of the script body 1 is brought into contact with the corner portion formed by the side frames 19, 19 of the top plate 18, and the side frames 19, 19
The stepped portion 5 is disposed in contact with a mounting fixture 21 which is bridged with fixing devices 20, such as screws, near the corner of the mounting fixture 21. A hole 22 is formed at approximately the center of the fixture 21 in correspondence with the mounting hole 7 of the stepped portion 5, and a skewer is inserted into the hole 22 of the fixture 21 and the mounting hole 7 of the script body 1. The bolt member 6 and the nut member 11 are screwed together by screwing the bolt member 6 inserted into the top plate 1, and the script body 1 is attached to the corner part of the top plate 1 via the upper cap body 3 and the fixture 21. Install it. In this way, the script bodies 1 are removably attached to the lower corners (four corners) of the kotatsu top plate 18, respectively. According to the above-described embodiment, the boss portion 23 is held by the ribs 9, and the ribs 9 allow the boss portion 23 to be attached to the outer circumferential wall of the upper cap body 3 corresponding to the ribs 9 during molding. Even if a distortion (dent) occurs, the upper cap body 3 is covered by the upper end of the script body 1 and is not visible from the outside, so that the appearance is kept beautiful. Also, this rib 9...
The boss portion 23 that holds the nut member 11 by increasing the
It is also possible to make the vicinity sufficiently strong, and in this case as well, since the ribs 9 are provided protruding from the inner wall of the upper cap body 3, the appearance will not be spoiled.

It should be noted that the present invention is not limited to the illustrated embodiment, and the design may be changed without changing the gist of the invention. Approximately W is provided on the side other than the corner, and is in contact with the outer peripheral wall of the script body 1.
It is also preferable to attach it via the bolt member 6 to the attachment tool 21 which is bent into a letter shape. Further, the shape of the recess 12 into which the elastic member 13 is fitted is not limited to that shown in the drawings, but can be changed to various shapes.

The present invention has effectively achieved the intended purpose with the configuration detailed above. In particular, since the metal nut member 11 is provided not in the large script body 1 but in the small upper cap body 3, it is easy to mold it into plastic, and since it is a small mold, it is relatively inexpensive even if the life is short. As a result, the large and expensive mold for the main body became significantly more durable, and the overall manufacturing cost was reduced. In addition, since the upper cap body 3 is fitted to the upper end of the script body 1 in an internal state, the upper cap body 3 is covered by the upper end of the script body 1 and is not visible from the outside. The legs have a smooth outer wall and a beautiful appearance. Also,
As mentioned above, since the structure is simple, the installation work can be done easily and quickly.

In this way, it is a device that has great practical effects.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, FIG. 3 is a sectional view of a main part, and FIG. 4 is a plan view. DESCRIPTION OF SYMBOLS 1...Screen body, 3...Upper cap body, 6...Bolt member, 7...Mounting hole, 11...Nut member,
18...Top plate.

Claims (1)

[Scope of utility model registration request] A plastic upper cap body 3 in which a metal nut member 11 is integrally embedded is fitted into the upper end portion of the plastic base body 1 as an inner part,
Further, the screw hole portion of the nut member 11 is opened in the horizontal direction, and a mounting hole 7 is provided through a part of the upper end peripheral wall of the script body 1 corresponding to the screw hole portion, and further, the kotatsu top plate 18 is provided. The bolt member 6, which is inserted into the hole 22 of the fixture 21 fixed near the corner formed by the side frames 19, 19, and the mounting hole 7 in a skewered manner, can be freely attached to and removed from the nut member 11. by screwing the script body 1 onto the upper cap body 3.
A leg attachment device for a home kotatsu, characterized in that it is configured to be detachably attached to a top plate 18 via a fixture 21.