JPH0655443U - Height adjustment device for furniture - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain an adjusting device that facilitates separation of a bolt and a grounding board, has a simple structure, and is inexpensive to manufacture. [Structure] Since the polygonal head 4a of the bolt 4 is fitted into the polygonal fitting hole 5 formed in the upper surface 3a of the grounding board 3, the grounding board 3
When the is rotated, the bolt 4 can also be integrally rotated, and the height of furniture or the like can be adjusted. Further, the retaining piece 7 provided on the grounding board 3 engages with the upper end edge 4b of the head 4a of the bolt 4 so that the grounding board 3 does not fall off from the bolt 4 even when lifting furniture or the like. Also,
The bolt 4 and the grounding board 3 can be easily separated only by unlocking the retaining piece 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a height adjusting device for furniture or the like, which is attached to the lower surface of legs of furniture or the like and adjusts the height, inclination or rattling of the furniture body.

[0002]

[Prior art]

 There is a conventional height adjusting device of this type in which a head of a metal bolt is integrally molded so as to be embedded in a resin grounding board. However, such a conventional height adjusting device has a problem that the two cannot be easily separated at the time of disposal. In particular, the effective use of resources has recently been reviewed, which is a major obstacle to recycling.

Further, as a device capable of separating the bolt and the grounding board, for example, a height adjusting device (applied in Japanese Utility Model Publication No. 4-32988) already filed by the applicant of the present invention. However, although it can be easily separated, there is a problem that the number of parts is large and the structure is complicated, resulting in high cost.

[0004]

[Problems to be solved by the device]

 The present invention has been made to solve the above problems, and an object thereof is to provide a height adjusting device for furniture or the like, which facilitates separation of a bolt from a grounding board, has a simple structure, and is inexpensive to manufacture. It is what

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention supports a lower end of furniture or the like and has a polygonal fitting hole formed in an upper surface thereof, and an inward retaining piece is provided inside the fitting hole. The provided grounding board and the polygonal head are fitted into the fitting holes of the installation board so that they cannot rotate relative to each other, and the retaining piece engages with the upper edge of the head to allow the head to move. Is equipped with a bolt screwed to the screw hole formed at the lower end of furniture or the like, and the screw portion connected to the head portion is prevented from coming off from the fitting hole.

[0006]

[Action]

 Since the polygonal head of the bolt is fitted into the polygonal fitting hole formed on the upper surface of the grounding board, the bolt can also rotate integrally when the grounding board is rotated. Can be adjusted. Also, the retaining piece provided on the grounding board engages with the upper edge of the head of the bolt, so there is no risk of the grounding board falling off from the bolt even when lifting furniture, etc. The bolt and the grounding board can be easily separated by simply unlocking the.

[0007]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. (1) is a height adjusting device according to the present invention, which is provided on the lower surface of legs (2a) of an office desk (2) and has a disk shape, and the diameter of the lower surface is smaller than the diameter of the central portion. Is also small, and is composed of a grounding board (3) and a bolt (4) with unevenness (3b) formed around the central part.

A bottomed fitting hole (5) having a regular hexagonal shape in plan view is formed at the center of the upper surface (3a) of the grounding board (3) supporting the lower end of the desk (2). . On the outer periphery of the fitting hole (5), three bottomed vertical holes (6) spaced 120 ° are continuously connected, and the bottom end (6a) of the vertical hole (6) has a tip. Three elastically bendable retainer pieces (7) are erected on which claws (7a) facing inward are formed.

The regular hexagonal head (4a) of the bolt (4) is fitted into the regular hexagonal fitting hole (5) of the grounding board (3) so as not to rotate relative to it. The claw (7a) of the retaining piece (7) engages with the upper edge (4b) of the head (4a) of the bolt (4) so that the head (4a) of the grounding board (3). It is fitted in (5) into the hexagonal fitting hole so that it cannot rotate relative to it. Then, the claw (7a) of the retaining piece (7) engages with the upper edge (4b) of the head (4a) of the bolt (4), so that the head (4a) is inserted through the fitting hole (5). The screw part (4c) connected to the head (4a) is screwed into the screw hole (8) formed at the tip of the leg (2a) of the desk (2) while being prevented from coming off. There is. The bolt (4) may be a dedicated product or a commercially available product, and has an advantage that it can be provided at a low cost.

(9) is a die-cutting hole for molding the grounding board (3). With the above structure, the head portion (4a) of the bolt is fitted into the fitting hole (5) in a relatively non-rotatable manner, so that the grounding plate (3) and the bolt (4) can be rotated together. Yes, the height of the desk (2) can be adjusted. Further, the claw (7a) of the retaining piece (7) provided in the fitting hole (5) locks the upper end edge of the head (4a) of the bolt (4) to move the desk (2) upward. The grounding plate (3) will not fall out from the bolt (4) even if it is lifted up. Further, when it is desired to separate the grounding board (3) and the bolt (4), the retaining piece (7) may be always unlocked, which facilitates the separation.

The head (4a) of the bolt (4) is pushed into the fitting hole (5) of the grounding board (3), and the retaining piece (7) is attached to the upper edge (4b) of the head (4a). The height adjusting device (1) can be easily manufactured only by locking the claw (7a).

The retaining piece (7) is an inward projection provided on the upper inner surface of the fitting hole (5) that is a regular hexagon, and the head (4a) of the bolt (4) is pushed while expanding the projection. The protrusion may be engaged with the upper edge of the head portion (4a) by pushing into the fitting hole (5). The point is that a retaining piece (7) for locking the upper edge (4b) of the head (4a) of the bolt (4) may be provided in the fitting hole (5). The numbers and the like are not limited to those in the above embodiment. Further, since the diameter of the lower surface of the grounding board (3) is smaller than the diameter of the central portion to reduce the friction of the grounding surface and to form the unevenness (3b) on the peripheral edge of the central portion, the grounding board (3) The rotation operation becomes very easy.

[0013]

[Effect of device]

 The present invention has the following effects. (a) Unlock the retaining piece that locks the upper edge of the bolt head, and pull out the bolt head from the fitting hole to separate the metal bolt from the resin grounding board. It can be easily separated and is useful for recycling resources.

(B) By simply pushing the head of the bolt into the fitting hole, the head of the bolt is locked by the retaining piece, and the height adjusting device can be easily assembled.

(C) Since the height adjusting device is composed only of the bolt and the grounding board, the number of parts is smaller and the manufacturing cost is lower than that of the conventional structure described in the above publication.

[Brief description of drawings]

FIG. 1 is a side view of a desk equipped with an embodiment of the present invention.

FIG. 2 is a vertical sectional view taken along the line II-II in FIG.

3 is a cross-sectional plan view taken along the line III-III in FIG.

[Explanation of symbols]

(1) Height adjustment device (2) Desk (2a) Leg (3) Grounding board (3a) Top surface (3b) Concavo-convex (4) Bolt (4a) Head (4b) Upper edge (4c) Screw part (5) Mating hole (6) Vertical hole (6a) Bottom surface (7) Locking piece (7a) Claw (8) Screw hole (9) Mold removal hole

Claims (1)

[Scope of utility model registration request] 1. A grounding board for supporting a lower end of furniture or the like, having a polygonal fitting hole formed in an upper surface thereof, and an inward retaining piece provided inside the fitting hole, The square head is fitted into the fitting hole of the installation board so as not to rotate relative to it, and the head is prevented from coming off the fitting hole by engaging the retaining piece with the upper edge of the head, A height adjusting device for furniture or the like, further comprising: a screw part connected to the head portion and a bolt screwed into a screw hole formed at a lower end of the furniture or the like.