JP2000089705A - Extension and contraction device for strut or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an extension and contraction device for a strut, etc., having excellent operability at the time of extension and contraction and having excellent appearance. SOLUTION: A screw rod 12 is erected on a base 10 and an adjusting nut 20 is vertically movably screwed onto the external threads (12a) of this screw rod 12. A pipe material 16 is provided so as to cover the screw rod 12 and the bottom end of the pipe material 16 is supported by the adjusting nut 20 and a cap is mounted in this state at the top end of the screw rod 12. The pipe material 16 is held between the adjusting nut 20 and the cap and a grip 14 is fitted onto the screw rod 12 and the pipe material 16. This grip 14 is rotated in the state of engaging the engaging projector (20a) of the adjusting nut 20 with the longitudinal groove (14a) recessed on the inner peripheral surface of the grip 14, by which the adjusting nut 20 is vertically moved and the pipe material 16 is moved upward and downward. The height adjustment is thus executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic device for vertically extending and retracting a column for supporting a display panel or the like.

[0002]

2. Description of the Related Art FIG. 5 shows a display panel using columns (52).
An example supporting (50) is shown. As shown in the figure,
The display panel (50) is supported in the exhibition state by the columns (52) erected on both sides, but if there is unevenness on the floor surface, the height of each column (52) will vary, Each strut (52) is provided with a telescopic device for adjusting the height in order to absorb the difference in height of the floor surface.

[0003] As an example of such a telescopic device, there is a device shown in FIG. In this device, a small-diameter movable pipe (58) that can move up and down is inserted into a large-diameter base pipe (56) attached to the center of a base (54) of a support (52), and the base pipe (5
By tightening the fixing screw (60) screwed to the side surface of (6), the movable pipe (58) is pressed and fixed at an arbitrary position.

[0004]

However, in the telescopic device shown in FIG. 6, the fixing screw (60) is tightened while the movable pipe (58) is extended and contracted to a desired height with respect to the base pipe (56). And it takes time to adjust the height. Further, since the fixing screw (60) is exposed to the outside, the appearance is poor in design.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and is intended to provide a telescopic device for supporting columns and the like which is excellent in operability when expanding and contracting the columns and the like and has a good appearance. The purpose is to provide.

[0006]

The present invention solves the above-mentioned problems as follows. (1) On a base placed on the floor, a screw having a threaded portion formed at the lower end and the upper end is erected, and an adjusting nut is screwed into a threaded portion at the lower end of the threaded rod. And the lower end of the pipe is supported by the adjusting nut, and a cap is screwed onto the thread at the upper end of the threaded rod, and the lower surface of the cap is brought into contact with the upper end of the pipe. The pipe member is sandwiched between the adjusting nut and the cap by being in contact with each other, and by rotating the adjusting nut and the cap, the pipe member is moved up and down with respect to the screw rod so that the height can be adjusted. And a cylindrical grip is rotatably fitted to the threaded rod and the pipe member with which the adjustment nut is screwed, and the rotation adjustment nut is fitted into a vertical groove recessed in an inner peripheral surface of the grip. Outer circumference The adjusting nut is rotatable through the engaging protrusion by engaging the projecting engaging protrusion and rotating the grip, and the engaging protrusion is arranged along the vertical groove. The adjustment nut allows the adjustment nut to move up and down without the grip moving up and down.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a telescopic device such as a column according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view of a column provided with a telescopic device according to the present embodiment, FIG. 2 is a longitudinal sectional front view of a main part of the telescopic device, and FIG. It is.

As shown in FIG. 1, the present embodiment employs a base
(10), screw (12), grip (14), pipe material (16)
, A support base (18), an adjustment nut (20), and the like.

The base 10 is fixed on a rectangular support base 18 with set screws 19, and is erected on the floor by the support base 18. As shown in FIG. 2, the base (10) is provided integrally with a vertical cylindrical portion (10b) projecting upward on the upper portion of the base portion (10a) having a truncated cone shape. A screw rod (12) pointing in the vertical direction is screwed and fixed to the center of ().

An external thread (12a) is engraved below the screw rod (12), and an axial internal thread (12b) is engraved from the upper end surface of the screw rod (12). A circular adjusting nut (20) is screwed into the lower male screw (12a), and two engaging projections (20a) projecting diametrically around the outer periphery of the adjusting nut (20). I have.

When the cylindrical grip (14) is fitted to the adjusting nut (20) and the cylindrical portion (10b) of the base (10), and the lower end of the grip (14) is fitted and supported on the base (10a), Each engaging protrusion (20a)
Are two longitudinal grooves (14) recessed in the inner peripheral wall of the grip (14).
a) will be engaged.

FIG. 3 is a cross-sectional plan view showing an engagement state between the grip (14) and the adjustment nut (20). Each engaging protrusion (20a)
Are engaged with two vertical grooves (14a) which are vertically recessed in the inner peripheral wall of the grip (14). For this reason, grip (14)
When the is rotated, the adjustment nut (20) also rotates, and the adjustment nut (20) is screwed up or down along the screw rod (12). At this time, the adjustment nut (20) is
Since the vertical movement is allowed by the vertical groove (14a) inside (14), the grip (14) itself does not move up and down.

The screw rod (12) is inserted into the inside of the pipe member (16), and a resin guide tube (21) is fixed at an appropriate position inside the pipe member (16). By touching,
This prevents rattling of the vertically moving screw (12) and guides its movement. The lower end of the pipe member (16) is in contact with the upper surface of the adjustment nut (20).

On the other hand, as shown in FIGS. 1 and 2, a male screw rod (22a) integral with the cap (22) is screwed into the female screw (12b) on the upper part of the screw rod (12). . As shown in FIG. 1, the pipe member (16) is normally held between the adjustment nut (20) and the cap (22).

Next, a description will be given of a method of using the column having the telescopic device according to the present embodiment configured as described above.

First, the cap (22) screwed on the upper part of the screw rod (12) is loosened to make the pipe member (16) free. Next, the grip (14) is rotated in the direction in which the adjustment nut (20) is moved upward, and the pipe member (16) is gradually moved upward. When the desired height is reached, tighten the cap (22), and remove the pipe material (16) from the cap (22) and the adjusting nut (20).
And fix it.

Conversely, when lowering the height of the column, the grip (14) is rotated so that the adjusting nut (20) is lowered, and the pipe member (16) is moved downward. When the desired height has been reached, tighten the cap (22) and pipe material (16).
And fix it.

As described above, according to the present embodiment, the height of the pipe member (16) is adjusted by rotating the grip (14), so that the operability is excellent. At the same time, the aesthetics have improved. When adjusting the height, the grip (14) does not move up and down,
Because only (16) moves up and down, there is no change in appearance,
Also excellent in design.

A screw may be formed at the upper end of the screw rod (12) instead of the female screw (12b), and a female screw cylinder integrally formed with the cap (22) may be screwed into the screw. Further, in the present embodiment, the case where the present invention is applied to a column extending / contracting device that supports an exhibition panel or the like has been described.

[0021]

According to the present invention, the height of the support column and the like can be extended and contracted in a stepless manner, and in the case of extending and contracting, only the grip needs to be rotated, so that the operability is excellent. In addition, since there are no protrusions to the outside, and there is no change in the appearance during expansion and contraction, the design is excellent and the appearance is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a support provided with one embodiment of a telescopic device of the present invention.

FIG. 2 is a longitudinal sectional front view showing a main part of the telescopic device in FIG.

FIG. 3 is a perspective view showing a main part of the telescopic device in FIG. 1 in an exposed manner.

FIG. 4 is a cross-sectional plan view taken along line IV-IV in FIG.

FIG. 5 is a perspective view showing an example in which a display panel is supported using a conventional column.

FIG. 6 is a perspective view of a main part of the column in FIG.

[Explanation of symbols]

 (10) Base (10a) Base (10b) Cylindrical part (12) Screw (12a) Male thread (12b) Female thread (14) Grip (14a) Vertical groove (16) Pipe material (18) Support base (19) Stop Screw (20) Adjustment nut (20a) Engagement protrusion (21) Guide cylinder (22) Cap (22a) Male thread rod

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Yukio Otsuka 79, Terashishi, Nishi, Kobashi, Miwa-cho, Kaifu-gun, Aichi Prefecture F-term in Tokai Screen Co., Ltd. (reference) 3J039 AA01 AB04 GA01

Claims (1)

[Claims] 1. A screw rod having a threaded portion formed at a lower end and an upper end is erected on a base mounted on a floor surface, and an adjusting nut is screwed into a threaded portion at a lower end of the threaded rod. A pipe member is inserted, a lower end of the pipe member is supported by the adjusting nut, and a cap is screwed and attached to a screw portion at an upper end of the screw rod, and a lower surface of the cap is connected to an upper end portion of the pipe member. By contacting the
By holding the pipe member between the adjustment nut and the cap, and rotating the adjustment nut and the cap, the pipe member can be raised and lowered with respect to the screw rod so that the height can be adjusted. The grip to be formed is rotatably externally fitted to the threaded rod and the pipe material to which the adjusting nut is screwed, and into a vertical groove recessed in the inner peripheral surface of the grip,
The adjustment nut is rotatable through the engagement protrusion by engaging an engagement protrusion protruding from an outer peripheral portion of the rotation adjustment nut and rotating the grip. A telescoping device, such as a column, wherein the adjustment nut is allowed to move up and down without the gripper moving up and down by guiding a protrusion along the vertical groove.