JP3023572U - Home kotatsu legs - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a leg for a home kotatsu, which is made of a synthetic resin and has good workability in assembly while reducing the number of parts. SOLUTION: A mounting portion (1) for attaching to a kotatsu frame is integrally formed on the upper end of a cylindrical leg body (2) made of synthetic resin which is integrally formed in a tapered shape with a lower end opening and expanding downward. . A nut accommodating chamber (3) is formed in the upper end surface of the mounting portion (1), and a plate nut (4) and a soft material cap (5) are inserted into the nut accommodating chamber (3). Cap made of soft material (5)
The upper surface of the mounting portion (1) is slightly projected from the upper surface of the mounting portion (1), and the mounting wall (7) of the mounting portion (1) and the projecting portion of the soft material cap (5) into the nut accommodating chamber (3). The through holes (12) and (19) for the fixing bolts are provided in each.

Description

[Detailed description of the device]

[0001]

[Field of Invention]

 The present invention relates to a leg for a home kotatsu.

[0002]

[Prior art]

 Generally, the leg for the home kotatsu is made of wood with a male male threaded rod protruding upward from the center of the upper end surface, or is integrally fixed by injection molding with the maleic rod by injection molding. Although synthetic resin products are used, for example, in furniture-like home pons, large, massive prismatic legs are preferred in order to reveal their heavy weight.

As such a prismatic synthetic resin leg body, those disclosed in Japanese Utility Model Publication No. Sho 64-2090 and Japanese Utility Model Publication No. 2-25049 have been conventionally proposed. In Japanese Utility Model Publication No. 64-2090, a nut member is attached to a synthetic resin with a nut mounting portion defined at an inner upper end portion of a cylindrical leg body having an upper surface closed and a lower surface opened. The nut support which is cast-in is inserted and fixed, and the one disclosed in Japanese Utility Model Publication No. 2-25049 is a cylindrical leg in which the upper surface is closed and the lower surface is opened. A nut support, in which a nut member is cast in a synthetic resin, is inserted and fixed to the entire upper end of the main body.

[0004]

[Problems to be solved by the device]

 However, in all of the above-mentioned conventional ones, the nut member must be cast into a nut support body having a large outer dimension that is fixedly mounted on the inner peripheral surface of the leg body, and therefore a large metal for forming the nut support body is required. In addition to requiring a mold, it is necessary to insert the nut support that is molded separately from the leg into the upper part of the leg by inserting it from the opening in the lower part of the leg. There was a problem that the mounting work was troublesome and assembly workability was poor. The present invention has been made in view of such a point, and an object thereof is to reduce the number of parts and to provide a leg for a home kotatsu made of a synthetic resin which is easy to assemble. .

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention integrates a mounting portion to a kotatsu frame into an upper end portion of a synthetic resin cylindrical leg body which is integrally formed in a taper shape and expands toward an open lower end. Form a protrusion, close the lower end opening of the leg body with a lower cap body, form a recess in the nut storage chamber on the upper end surface of the mounting part, and insert the plate nut and the soft material cap into this nut storage chamber. Then, project the top surface of the soft material cap slightly above the top surface of the mounting part, and insert the fixing bolt insertion holes through the mounting surface of the mounting part and the protruding part of the soft material cap into the nut chamber. It is characterized by what was done.

[0006]

[Action]

 In the present invention, a mounting portion to the kotatsu frame is integrally formed at the upper end portion of the synthetic resin cylindrical leg body that is integrally formed in a taper shape that expands toward the open lower end, and the lower end of the leg body is formed. The opening is closed with a lower cap body, a nut housing chamber is formed in the upper end surface of the mounting portion, and a plate nut and a soft material cap are inserted into this nut housing chamber, and the upper surface of the soft material cap is attached to the mounting portion. Of the fixing bolt and the mounting surface of the mounting part and the projecting part of the soft material cap into the nut accommodating chamber are inserted through the fixing bolts. A nut that engages with the fixing bolt at the time of connection can be mounted from the upper part of the leg body, and work efficiency can be improved. In addition, since it is not necessary to cast the nut on the support body having a large outer dimension, the structure of the die for forming the leg can be simplified.

[0007]

[Embodiment of device]

 1 shows an embodiment of the present invention, FIG. 1 is a partially cutaway sectional view of a leg for a home tattoo, and FIG. 2 is an exploded perspective view showing a state in which a part of an upper leg is cut away. This leg for home kotatsu has a synthetic resin leg body (2) with an attachment part (1) to the kotatsu frame at the upper end and an open lower end, and this attachment part (1). ), A plate nut (4) to be inserted into the nut containing chamber (3), a soft material cap (5) to be inserted into the nut containing chamber (3) together with the plate nut (4), and a leg body (2) And a lower cap body (6) for closing the lower end opening of the.

The leg body (2) is a tubular body having a substantially elliptical cross section, and is a downwardly widening tapered barrel whose diameter increases toward the lower side. The attachment part (1) to the kotatsu frame formed at the upper end is the mounting wall (7) that rises in the direction along the major axis direction of the leg body (2) and the left and right end parts of this mounting wall (7). And a connecting wall (8) which is connected at an opening angle of 135 degrees, and the mounting wall (7) rises from the inner side of the peripheral side wall of the leg body (2) on the minor diameter side. For this reason, the mounting portion (1) is formed in a substantially fan-shaped shape in which the small diameter side is straight in the cross section, and one upper end portion on the short diameter side of the leg body (2) is formed in a stepped shape. .

A nut accommodating chamber (3) is recessed in the upper wall (9) of the mounting portion (1). The nut accommodating chamber (3) is formed into a square hole having an open top surface with the inner surface of the mounting wall (7) as one side wall. The nut accommodating chamber (3) has a peripheral edge portion at the top opening. A fitting portion (11) to which the peripheral flange portion (10) of the soft material cap (5) is fitted is formed. Further, a through hole (12) for a fixing bolt is formed through the mounting wall (7), and the inner wall (13) arranged to face the mounting wall (7) has a mounting wall (7). ), A vertical groove (14) having a width equal to the diameter of the fixing bolt insertion hole (12) is formed at a position facing the fixing bolt insertion hole (12). The upper end of is located at a position slightly higher than the position corresponding to the upper end position of the fixing bolt insertion hole (1 2).

The soft material cap (5) includes an insertion piece portion (15) fitted into the nut accommodating chamber (3), and the peripheral flange portion (10) continuous with the upper end of the insertion piece portion (15). The upper body (16) located above the peripheral flange portion (10) is integrally formed, and the plate nut (4) is embedded in the insertion piece portion (15). A bolt insertion hole (19) is transparently provided in the insertion piece portion (15) corresponding to the screw hole (18) of the plate nut (4). A wedge-shaped engaging projection (20) is formed on the side surface of the insertion piece portion (15) where the bolt insertion hole (19) is not formed. The engaging projections (20) are attached to the engaging portions formed on the inner side wall (13) of the nut accommodating chamber (3) with the soft material cap (5) inserted into the nut accommodating chamber (3). The soft material cap (5) is engaged to prevent the soft material cap (5) from coming off. Further, reference numeral (17) in FIG. 2 denotes a ridge formed on the insertion tip end surface of the insertion piece portion (15) of the soft material cap (5), and the ridge (17) is a bolt insertion hole ( It is formed parallel to the axial direction of 19).

FIGS. 3 and 4 show a modified example of the plate nut holding portion, which is a plate nut on one side parallel to the mounting wall (7) of the insertion piece portion (15) of the soft material cap (5). The fitting recess (21) is formed, and the plate nut fitting recess (21) is positioned on the inner wall (13) side of the nut accommodating chamber (3), and the soft material cap (5) is By inserting the insertion piece portion (15) between the plate nut (4) inserted in the nut housing chamber (3) and the mounting wall (7), the plate nut (4) is inserted into the nut housing chamber. (3) It is designed to be firmly maintained in the prescribed position.

In the leg for the home kotatsu constructed as described above, the plate nut (4) and the soft material cap (5) are attached to the mounting portion (1) formed at the upper end of the leg body (2). Insert it from the top, set the mounting part (1) to the kotatsu frame, and tighten the kotatsu frame and the leg body (2) together with the fixing bolts. Then, the plate nut (4) will be placed in the nut housing chamber (3). The insertion piece portion (15) of the soft material cap (5) between the attachment wall (7) and the mounting wall (7) of the attachment portion (1) is pinched and elastically deformed. The part (15) acts like a spring washer and can firmly hold the leg body (2). Further, when the soft material cap (5) is attached to the kotatsu frame, the upper body (16) of the soft material cap (5) projects beyond the upper wall (9) of the attachment portion (1). Since the upper body (16) of (5) projects from the upper surface of the kotatsu frame and is ready to receive the top plate placed on the kotatsu frame, prevent the placed top plate from rattling. You can

[0013]

[Effect of device]

 A synthetic resin cylindrical leg body with a lower end that opens and expands downward is integrally formed with an attachment part for attachment to the kotatsu frame at the upper end, and the lower end opening of the leg body is lowered. Block with the cap body and form a recess in the nut housing chamber on the upper end surface of the mounting part.Insert the plate nut and the soft material cap into this nut housing chamber, and place the upper surface of the soft material cap above the upper surface of the mounting part. The mounting holes of the fixing bolts are made to protrude through the mounting surface of the mounting part and the projecting part of the soft material cap into the nut accommodating chamber. The nut to be screwed with can be mounted from the upper part of the leg body, improving work efficiency. Further, since the nut need not be wrapped in the leg forming resin, the structure of the leg forming mold can be simplified.

[Brief description of drawings]

FIG. 1 is a partially cutaway cross-sectional view of a leg for a home kotatsu.

FIG. 2 is an exploded perspective view of an upper part of a leg.

FIG. 3 is a taken-out cross-sectional view of a main part showing a modified example of the soft material cap.

FIG. 4 is an exploded perspective view of an upper part of a leg in a modified example.

[Explanation of symbols]

1 ... Attachment part, 2 ... Leg body, 3 ... Nut storage chamber, 4 ...
Plate nut, 5 ... Soft material cap, 6 ... Lower cap body,
7 ... Mounting wall, 12/19 ... Fixing bolt insertion hole, 17 ... Plate nut insertion slot, 21 ... Plate nut fitting recess.

Claims (3)

[Scope of utility model registration request] 1. A mounting portion (1) for attaching to a kotatsu frame is integrally formed at the upper end of a synthetic resin cylindrical leg body (2) which is integrally formed in a taper shape and expands toward an open lower end. Then, the lower end opening of the leg body (2) is closed by the lower cap body (6), and the nut accommodating chamber (3) is formed in the upper end surface of the mounting portion (1), and the nut accommodating chamber (3) is formed. Insert the plate nut (4) and the soft material cap (5) into the plate, and make the upper surface of the soft material cap (5) slightly protrude from the upper surface of the mounting portion (1) to mount the mounting portion (1). Wall (7) and softwood cap (5)
A leg for a home kotatsu, through which insertion holes (12) and (19) for fixing bolts are transparently provided at the protruding portion into the nut housing chamber (3) of the above. 2. The nut accommodating chamber of the soft material cap (5)
Place the plate nut (4) in a state of being cast in the insertion part into (3), and insert the soft material cap (5) and the plate nut (4) into the nut accommodating chamber (3). The leg for home pats according to claim 1. 3. The nut accommodating chamber of the soft material cap (5)
A plate nut fitting concave portion (21) is formed on one side surface of the insertion portion into (3), and the soft material cap (5) is fitted with the plate nut (4) fitted in the plate nut fitting concave portion (21). ) And the plate nut (4) are inserted into the nut accommodating chamber (3).