JP2572494Y2 - Pillar lifting mechanism for desks, etc. - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column elevating mechanism for adjusting the height of a top plate, a seat and the like in a learning desk or chair.

[0002]

2. Description of the Related Art Conventionally, in a learning desk or a chair, for example, a pedestal elevating mechanism for slidable in a height direction for adjusting a height of a top plate and a seat portion thereof is, for example, mounted on a pedestal. An outer cylinder that is erected and an inner cylinder that is vertically installed on the lower surface of the top plate, and a lock mechanism that fixes these in the sliding direction, the outer cylinder has a through hole on its upper side surface, Also, the inner cylinder has a lower side surface, a through hole that opens at the lower end and extends in the height direction,
A plurality of horizontally long adjusting holes disposed along the longitudinal direction of the through hole, and a locking mechanism inserted into the through hole, and a locking mechanism fixed to the upper side surface of the outer cylinder by the locking rod. And a locking piece having a locking piece at the upper end for locking in the adjustment hole, and a suppressing piece interposed in the inner cylinder and screwed into the screw rod. At the same time, the lock piece is screwed to the outer surface of the upper end of the outer cylinder with a screw rod, and the engagement piece provided at the upper end is engaged with the adjustment hole at the required position to thereby engage the inner cylinder with the outer cylinder. It was intended to fix the cylinder.

[0003]

However, according to the above-described conventional configuration, the desk and chair are rattled due to the play between the outer cylinder and the inner cylinder due to the sliding between them. In order to securely fix the lock piece to the outer cylinder, it is necessary to screw it in at least two places. Therefore, it takes time and effort to adjust the elevation and the lock piece swells on the outer surface of the outer cylinder. There were inconveniences such as poor appearance and catching.

[0004]

SUMMARY OF THE INVENTION Accordingly, in order to solve the above-mentioned conventional disadvantages, the present invention has been made to solve the above-mentioned disadvantages in a column of a desk or the like having an outer cylinder and an inner cylinder fitted slidably in a height direction. A side wall of the cylinder is provided with a concave portion extending in the sliding direction from an opening edge thereof and bulging inward, and a through hole and a locking hole are provided in the concave portion at upper and lower positions. A side surface of the side surface facing the concave portion of the outer cylinder is provided with a concave portion extending in the sliding direction from an opening edge and fitted to the inner surface of the concave portion of the outer cylinder, and the concave portion has an open end. A through hole that opens at the edge and extends in the sliding direction, and a plurality of adjustment holes that are orthogonally spaced along the longitudinal direction of the through hole, and further includes a through hole of the outer cylinder and a through hole of the inner cylinder. A threaded rod to be inserted into the outer cylinder, and an engagement piece that engages with the adjustment hole at an upper and lower position of a contact piece that fits into the concave portion of the outer cylinder. A locking piece provided with a projecting piece engaging with the stop hole, and a through hole for inserting a screw rod at an intermediate position, and an inner surface bulging portion of a concave portion interposed in the inner cylinder. A front side piece is provided on the left and right side edges so as to straddle, and a locking mechanism including a restraining piece having a screw hole to be screwed with the screw rod is provided. The outer cylinder and the inner cylinder are formed in an oval shape in cross section, and a concave portion is provided on one side surface in the minor diameter direction,
Further, a through hole provided in the outer cylinder for facilitating mutual assembling operation is formed of an elongated hole opened at the opening edge and extending in the sliding direction, and the locking hole is located at a position below the elongated hole. The left and right peripheral surfaces forming the concave part of the outer cylinder and the concave part of the inner cylinder are further inclined inward to make the inner surface of the concave part of the outer cylinder closely contact with the concave part of the inner cylinder. Things.

[0005]

The locking piece and the suppressing piece are connected by the screw rod, and the screw rod is inserted into the through-hole of the outer cylinder and the through-hole of the inner cylinder, respectively, and the inner surface of the concave portion of the outer cylinder. The bulging portion is fitted into the concave portion of the inner cylinder, the protruding piece is locked in the locking hole, and the engaging piece is locked in the adjusting hole. When adjusting the protrusion length of the inner cylinder with respect to the outer cylinder in this state, when the inner cylinder is slid with respect to the outer cylinder in a state where the engagement piece and the adjustment hole are disengaged, the inner cylinder has a concave shape. The portion is raised and lowered while being guided by the inner surface of the concave portion of the outer cylinder, adjusted to a predetermined height, and then tightens the screw rod to engage the engaging piece with the adjustment hole at a required opposing position. By the tightening operation, the concave portion of the inner cylinder comes into close contact with the inner surface bulging portion of the concave portion of the outer cylinder, and the lateral deflection of the inner cylinder is suppressed, and the locking hole and the protruding piece and the adjusting hole and the engaging By the engagement, the sliding in the length direction between the outer cylinder and the inner cylinder is securely fixed by the lock piece.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described in detail below with reference to the drawings. A pillar 1 is composed of, for example, an outer cylinder 2 having an elliptical cross section erected on a base and a lower surface of a top plate. The vertically extending cross section is composed of an inner cylinder 3 having an elliptical shape, and the outer cylinder 2 bulges inward on the upper side surface in the minor diameter direction by being surrounded by a peripheral edge 4 inclined inward. Concave portion 5 extending downward from the upper edge
In the concave portion 5, a narrow through hole 6 opening at the upper edge thereof and extending downward, and a locking hole 7 located below the through hole 6 are respectively formed by drilling. is there.

The inner cylinder 3 fitted into the outer cylinder 2 from the upper end thereof is fitted with the inner bulge 5a of the concave part 5 of the outer cylinder 2 on the lower side surface in the short diameter direction facing the concave part 5. As a result, a concave portion 9 is formed, which is surrounded by an inwardly inclined peripheral edge 8 and bulges inward, extends upward from the lower edge and has a length longer than the length of the concave portion 5. A narrow through hole 10 opened at the lower edge thereof and extending upward,
A plurality of adjustment holes 11 that are orthogonal to 0 and that are spaced along the length thereof are provided.

The lock mechanism 12 for fixing the sliding between the outer cylinder 2 and the inner cylinder 3 includes a threaded rod 13 having a thickness capable of being inserted into the through hole 6 of the outer cylinder 2 and the through hole 10 of the inner cylinder 3. And a projecting piece 15 projecting inwardly from the lower edge of the contact piece 14 having a size to fit into the concave portion 5 of the outer cylinder 2 and engaging with the engaging hole 7 of the outer cylinder 2. An engagement piece 16 is formed at an upper edge of the outer cylinder 2 so as to protrude in the inner surface direction and to engage with the adjustment hole 11 of the inner cylinder 3 beyond the upper end edge of the concave portion 5 of the outer cylinder 2. A lock piece 18 having a through hole 17 and a front side piece 19 are formed on the left and right side edges so as to straddle the inner bulge of the concave upper portion 9, and are bent rearward on the upper and lower edges. And a restraining piece 22 having a screw hole 21 in the center.

Thus, the locking piece 1 is fixed by the screw rod 13.
8 and the suppressing piece 22, and the screw rod 13 is inserted into the through hole 6 of the outer cylinder 2 and the through hole 10 of the inner cylinder 3, respectively, so that the inner surface bulging portion 5 a of the concave portion 5 is 3, the projection 15 is locked in the locking hole 7, and the engagement piece 16 is locked in the adjusting hole 11, respectively. In this state, when adjusting the protruding length of the inner cylinder 3 with respect to the outer cylinder 2, for example, the height of the top plate, the engagement between the engagement piece 16 and the adjustment hole 11 is released with respect to the outer cylinder 2. The inner cylinder 3 slides. Then, the concave portion 9 moves up and down while being guided by the inner surface bulging portion 5a of the concave portion 5, adjusts the height to a predetermined height, and then tightens the screw rod 13 to engage the engaging piece 16 with the adjusting hole 11 at a required position opposed to the engaging hole 16. When the screw rod 13 is tightened, the outer cylinder 2 and the inner cylinder 3 are
The inner bulging portion 5a and the concave portion 9 are closely contacted to suppress the lateral vibration of the inner cylinder 3 and to engage with the locking hole 7 and the protruding piece 15 and the adjusting hole 11 and the engaging piece 16 to be out of contact with each other. The sliding in the length direction between the cylinder 2 and the inner cylinder 3 is reliably fixed by the lock piece 18. In the above, the vertical relationship between the outer cylinder 2 and the inner cylinder 3 is
It is not limited to the embodiment.

[0010]

As described above, according to the present invention, the outer cylinder and the inner cylinder are provided with concave portions which extend in the sliding direction and are fitted to each other, and these concave portions are fitted to each other to tighten. With this configuration, it is possible to prevent rattling in the sliding direction between the outer cylinder and the inner cylinder and in the left and right directions, and since only one screw rod is required, the height of the pillar can be adjusted. It is easy, and since the lock piece is fitted in the concave part, the appearance is good, the snagging can be eliminated, and the restraining part has front side pieces on the left and right side edges, so the height is high. When the screw rod is loosened or tightened to adjust the position, there is an advantage that the side piece abuts against the side surface of the inner bulging portion of the inner cylinder so that there is no fear that the restraining piece will idle.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a use state with a part omitted.

FIG. 2 is an exploded perspective view partially omitted.

FIG. 3 is a cross-sectional plan view in use.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pillar 2 Outer cylinder 3 Inner cylinder 4,8 Perimeter 5,9 Concave part 6,10,17 Through-hole 7 Locking hole 11 Adjustment hole 12 Lock mechanism 13 Screw rod 14 This piece 15 Protrusion piece 16 Engagement piece 17 Through Hole 18 Lock piece 19 Side piece 21 Screw hole 22 Suppression piece

Claims (4)

(57) [Scope of request for utility model registration] 1. A side surface of the outer cylinder in a pillar such as a desk including an outer cylinder and an inner cylinder fitted slidably in a height direction,
A concave portion extending from the opening edge in the sliding direction and bulging inward is provided, and a through hole and a locking hole are provided in the concave portion at upper and lower positions. On the side surface facing the concave portion of the cylinder, while providing a concave portion that extends in the sliding direction from the opening edge and fits with the inner surface of the concave portion of the outer cylinder,
The concave portion is provided with a through hole that opens at the opening edge and extends in the sliding direction, and a plurality of adjustment holes that are orthogonally spaced along the longitudinal direction of the through hole. A threaded rod inserted into the hole and the through hole of the inner cylinder, and an engagement piece engaged with the adjustment hole and an engagement with the engagement hole at the upper and lower positions of a contact piece fitted into the concave portion of the outer cylinder. And a locking piece provided with a through hole for inserting a screw rod at an intermediate position, and a left and right side interposed in the inner cylinder so as to straddle an inner surface bulging portion of the concave portion. A mechanism for elevating and lowering a pillar in a desk or the like, wherein a locking mechanism comprising a front side piece on an edge and a restraining piece having a screw hole screwed with the screw rod is provided. 2. The elevator mechanism according to claim 1, wherein the outer cylinder and the inner cylinder are formed in an oval shape in cross section, and a concave portion is provided on one side surface in the minor diameter direction. 3. A through hole provided in the outer cylinder comprises an elongated hole opened at an opening edge and extending in a sliding direction, and a locking hole is provided at a position below the elongated hole. Or a mechanism for raising and lowering a pillar in the desk or the like according to 2. 4. The pedestal elevating mechanism for a desk or the like according to claim 1, wherein the left and right peripheral surfaces forming the concave portion of the outer cylinder and the concave portion of the inner cylinder are respectively inclined inward.