JPH0432988Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention can be attached to the underside of the legs of furniture, machinery, etc., for example, to adjust the height, or to prevent tilting or wobbling of furniture, etc. due to uneven floor surfaces. The present invention relates to a height adjusting device which is easy to operate and has a good appearance, and which eliminates sticking.

[Conventional technology]

FIG. 3 shows an example of a conventional height adjustment device, in which a bolt 2 is screwed into a screw hole on the underside of the furniture 1.
A ground plate 3 is fixed to the lower end of the
It is supported on the floor 4.

The height of the furniture 1 is adjusted by rotating the bolt 2 together with the ground plate 4.

FIG. 4 shows another conventional example described in Japanese Utility Model Publication No. 56-32113.

A blind shaft hole 11 is bored in the center of the lower surface of the head 21 of the bolt 2 that is screwed into the screw hole on the lower surface of the furniture 1, and an annular groove 12 is formed in the inner peripheral surface of the shaft hole 11. It is cut out.

A support shaft 13 erected at the center of the upper surface of the ground plate 3 is loosely fitted into the shaft hole 11 so as to come into contact with the upper end surface of the shaft hole 11 .
An annular groove 14 facing the annular groove 12 of the first one is cut.

By forcibly fitting C-shaped locking rings 15 into both annular grooves 12 and 14, the support shaft 13 is prevented from coming off by the bolt 2.

Furniture 1 is attached to floor 4 via bolts 2 and ground plate 3.
By rotating bolt 2,
Height is adjusted.

[Problem that the invention attempts to solve]

The mechanism shown in FIG. 3 is simple and inexpensive, but when the ground plate 3 is in close contact with the floor 4,
The bolt 2 is difficult to rotate due to friction between them, and therefore, when rotating the bolt 2, there is a problem in that the furniture 1 or the like must be lifted slightly or a spanner or the like must be used.

The frictional resistance when rotating the bolt 2 in the one shown in Figure 4 is smaller than that shown in Figure 3, but it is still necessary to lift the furniture a little or use a spanner, etc., and the bolt 2 The fitting portion of the supporting shaft 13 needs to be machined with high precision, which makes manufacturing troublesome.

[Means for solving problems]

The present invention includes a ground plate having a cylindrical part, a cylindrical shape whose upper end is closed by an upper wall, and a shaft hole that is rotatably fitted onto the cylindrical part of the ground plate, and a shaft hole in the center of the upper wall. A rotary tube in which polygonal fitting holes are continuously formed vertically, and a polygonal head is fitted into the fitting hole of the rotary tube so as not to be relatively rotatable, and is connected to the head. The provided shaft passes through the shaft hole and extends upward from the rotary cylinder, and is screwed into a screw hole drilled in the lower end of furniture, etc., and the lower end of the head is inserted through the steel ball. The above-mentioned problem is solved by providing a bolt rotatably supported at the center of the upper surface of the ground plate, and a retaining means for preventing the rotary tube from coming off from the cylindrical portion of the ground plate. be.

[Effect]

In the device of this invention, the bolt screwed into the underside of the furniture is supported by the ground plate through the steel ball, so the frictional resistance when rotating the bolt is extremely small, and it is also significantly smaller than the head of the bolt. Since the bolts can be rotated by operating the large rotary tube, the height of the furniture can be easily adjusted without using any tools while keeping the ground plate in contact with the ground.

[Embodiment] FIGS. 1 and 2 show an embodiment of the present invention, and members corresponding to those in the conventional example described above will be described with the same reference numerals.

The bolt 2 has a hexagonal or other polygonal head 21, a screw hole (not shown) connected to the head 21, and bored at the lower end of the leg of the furniture 1, such as a desk or chair. ) and an upwardly facing shaft portion 22 screwed into the shaft portion 22.

A spherical recess 23 is bored in the lower surface of the head 21 of the bolt 2 .

The ground plate 3 includes a disk-shaped bottom wall portion 31 and a bottom wall portion 3.
1 and a cylindrical portion 32 erected on the upper surface of the cylindrical portion 1.

On the outer peripheral surface of the cylindrical portion 32, four engaging protrusions 33 arranged on the same circumference at equal intervals are protruded, and in the center of the upper surface of the bottom wall portion 31, a spherical recess 34 is provided at the upper end. A boss portion 35 is provided.

Reference numeral 5 denotes a rotating cylinder made of a hard synthetic resin material having appropriate elasticity, and has a cylindrical shape whose upper end is closed by an upper wall 51.

A circular hanging portion 52 is provided at the center of the lower surface of the upper wall 51. The shaft portion 2 of the bolt 2 extends from the upper surface at the center of the upper wall 51 to the lower surface of the hanging portion 52.
A shaft hole 53 through which the bolt 2 passes, and a hexagonal or other polygonal fitting hole 54 into which the head 21 of the bolt 2 is fitted from below so as not to rotate relative to each other are vertically connected and bored. There is.

A cylindrical portion 32 of the ground plate 3 is provided on the inner circumferential surface of the rotary cylinder 5.
An annular groove 55 is bored at a position corresponding to the engaging protrusion 33 .

The rotary cylinder 5 is connected by sandwiching the steel ball 6 between the recess 23 at the lower end of the bolt 2 and the recess 34 of the ground plate 3, and by engaging the engagement protrusion 33 in the annular groove 55. It is rotatably fitted onto the cylindrical portion 32 of the base plate 3 and is prevented from coming off from the cylindrical portion 32 by a retaining means 7 formed by an annular groove 55 and an engaging protrusion 33 .

According to this embodiment, by placing the ground plate 3 on the floor 4, the furniture 1 is supported on the floor 4 via the bolts 2, steel balls 6, and the ground plate 3, and in this state, the furniture 1 can be rotated. By rotating the cylinder 5, the ground plate 3
The height of the furniture can be easily adjusted by lightly rotating the bolt 2 while the furniture remains in close contact with the floor 4.

[Effect of idea]

In the device of the present invention, the bolts that support the furniture are supported on the ground plate via the steel balls, so the frictional resistance when rotating the bolts is extremely small.
Moreover, the bolt can be rotated by operating a rotating tube that is significantly larger than the head of the bolt, so the height of the furniture can be easily adjusted without using tools while keeping the ground plate in contact with the ground. .

In addition, both the rotating tube and the ground plate are attached to the bolts so that they will not fall off, so they will not come off to the side when adjusting the height of the furniture, or be lost when moving the furniture. .

[Brief explanation of the drawing]

Fig. 1 is an exploded central longitudinal sectional view showing one embodiment of the present invention, Fig. 2 is a partially cutaway longitudinal sectional front view, Fig. 3 is a front view showing a conventional example, and Fig. 4 FIG. 7 is a central longitudinal sectional front view showing another conventional example. 1... Furniture, 2... Bolt, 3... Ground plate, 4
... Floor, 5 ... Rotating cylinder, 6 ... Steel ball, 7 ... Stopping means, 11 ... Shaft hole, 12 ... Annular groove, 13
... Support shaft, 14 ... Annular groove, 15 ... Locking ring, 2
1... Head, 22... Shaft, 23... Recess, 31
. . . Bottom wall portion, 32 . ... Fitting hole, 55 ... Annular groove.

Claims (1)

[Claims for Utility Model Registration] (1) A grounding plate having a cylindrical portion, which has a cylindrical shape whose upper end is closed by an upper wall, and is rotatably fitted onto the cylindrical portion of the grounding plate, and which a rotary tube in which a shaft hole and a polygonal fitting hole are continuously bored vertically in the center of the rotary tube; , and a shaft connected to the head extends upward from the rotary cylinder through the shaft hole, and is screwed into a screw hole drilled in the lower end of the furniture, etc.; Furniture, etc., characterized by comprising: a bolt whose lower end is rotatably supported at the center of the upper surface of the ground plate via a steel ball; and a retaining means for preventing the rotary cylinder from coming off from the cylindrical portion of the ground plate. Height adjustment device. (2) A utility model registration request in which the retaining means comprises an engaging protrusion provided on the outer periphery of the cylindrical portion of the ground plate and an annular groove provided on the inner surface of the rotating cylinder and engaged with the engaging protrusion. A height adjustment device for furniture, etc. according to item 1.