JP2002345564A - Height controlling type table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a height controlling type table with high reliability in which a leg pillar is elevated and lowered by using a rack and a pinion. SOLUTION: This height controlling type table is composed of the leg pillar consists of a leg pillar body consisting of a pipe, an outer cylindrical part which externally fits the bottom part of the leg pillar main body so as to be freely slid, and a leg stand fixed on the outer cylindrical part, in the leg pillar body, an actuating lever on the upper part of which a rack is provided and whose lower part is fixed on the leg stand side is built in so as to be freely slid, a pinion intermeshing the rack is provided by being coaxial to the rotating shaft of an operating lever provided on the outside of the leg pillar and in the leg pillar body, and the rack is elevated and lowered through the pinion by rotating the operating lever and the leg pillar body is extended and contracted to adjust the height.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a height-adjustable table which can adjust a height in a plurality of steps by expanding and contracting a pillar.

[0002]

2. Description of the Related Art Hitherto, various structures have been known as mechanisms for adjusting the height of a pedestal. However, when a height adjusting structure appears outside, the structure is damaged by an impact or the body is pinched by a telescopic part. For this reason, a structure in which a height adjusting mechanism is built in the pillar is used. However, in that case, the configuration becomes complicated or there is a problem in reliability.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a highly-reliable height-adjustable table in which a pedestal is raised and lowered using a rack and a pinion. To provide.

[0004]

According to a first aspect of the present invention, there is provided a height-adjustable table capable of adjusting the height of a pillar of a table in a plurality of steps. A pedestal body consisting of: an outer cylinder part for slidably fitting the lower part of the pedestal body, and a pedestal fixed to the outer cylinder part. A rack is provided and an operating rod whose lower part is fixed to the footrest side is slidably built in,
A pinion that meshes with the rack is provided inside the pillar body coaxially with the rotation axis of the operation lever provided on the outside of the pillar, and the rack is moved up and down via the pinion by rotation of the operation lever to expand and contract the pillar body. The technical measure of height adjustment is taken.

According to the invention of claim 2, a top plate is pivotally attached to the upper part of the pillar body so as to be freely foldable, a lock receiving portion is provided at a predetermined position of the pillar body, and the operating lever is provided on the operating lever. Technical means that a lock portion biased in the lock direction for locking to the lock receiving portion at the stationary position is provided. Further, in the invention according to claim 3, the pillar main body is made of a pipe having a substantially flat elliptical cross section, and an operating rod is slidably incorporated on one side, and a driven rod connected to the operating rod on the other side. A technical means of slidably housed therein and provided with a guide cylinder portion for guiding the raising and lowering of the operating rod and the driven rod is provided.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment in which a height-adjustable table according to the present invention is applied to a folding table will be described below with reference to the drawings. This folding table 1
As shown in FIGS. 1 to 3, a top plate 2, a top plate support frame 3 fixed to the top plate 2, and a pair of left and right pillars 5 having a bracket 4 for supporting the top plate at its upper end. Has become. Here, the folding structure of the top plate 2 has a known configuration in which the top plate support frame 3 is pivotally mounted on the pivot P1 of the bracket 4 as a fulcrum, and the unfolded or folded position of the top plate is held by a lock mechanism (not shown). The description is omitted.

Next, a pair of pillars 5 provided at the center on both the left and right sides of the top plate 2 has a pillar body 6 made of a pipe and an outer part which slidably fits a lower portion of the pillar body 6. It is composed of a tubular portion 7 and a footrest 8 fixed to the outer tubular portion 7, and a horizontal rail 9 is provided between the pillar main bodies 6 at an intermediate position. Reference numeral 10 denotes a caster attached to the footrest 8.

The pillar main body 6 is formed of a pipe having a substantially flat elliptical cross section, and one side inside each pillar main body 6 (FIG. 6).
On the right side, the operating rod 11 is slidably incorporated, and on the other side (the left side in FIG. 6), the driven rod 13 connected to the operating rod 11 at the lower end is provided.
And are arranged in pairs so as to sandwich a pinion described later.

A first guide cylinder 15 for guiding the operating rod 11 and the driven rod 13 to slide vertically at an intermediate position, and a lower end position of the pillar main body 6 are provided on the pillar main body 6. And the second guide cylinder portion 16 guided by the second fixing member. Here, the operating rod 11 and the driven rod 13 may be solid rods or pipes, as long as they have a strength capable of supporting the pillar main body.

The operating rod 11 has a rack 12 integrally provided on an upper portion thereof, and a lower portion thereof is fixed to a connecting plate 17.
Here, a slider 12a having a sliding property that slides along the inner wall of the pillar main body 6 protrudes from the upper rear surface of the rack 12 (see FIGS. 4 and 6). The driven rod 13 has an upper free end and a lower fixed to the connecting plate 17. The lower ends of the operating rod 11 and the driven rod 13 are connected to the connecting plate 17.
And is integrally connected to the footrest 8 by a fixing screw 18 fixed to the footrest 8 via.

Therefore, at the time of assembly, as shown in FIG.
A connecting plate 17 protruding from the lower end of the pillar body 6 is inserted to the bottom of the outer cylinder 7, and is screwed into a screw hole formed in the connecting plate 17 with a screw inserted from the bottom side of the footrest 8, The connecting plate 17 is fixed to the base 8 (see FIG. 7).

Next, an operation lever 21 is provided on the outer side of the upper part of the one pillar main body 6.
A pinion 24 that meshes with the rack 12 inside the pillar main body 6 is integrally provided on a rotation shaft 23 provided on one base portion 22. In the case of the illustrated example, this pinion 24
Corresponds to one stroke (100 mm) of raising or lowering the rack 12, and the rack 12 is displaced by half (50 mm) by a half rotation of the pinion 24.
The height can be adjusted in stages.

The cross bar 9 is formed of a pipe having a substantially flat elliptical cross section.
The rack 12 provided on the pillar main body 6 that faces through the inside of the crosspiece 9 with the rotation shaft 23 that rotates the rotation 4 serving as the transmission shaft
The connecting rod 25 and the connecting pipe 26 are integrally connected so as to be coaxial with the rotating shaft 23 of FIGS.
reference). Therefore, in conjunction with the rotation of the pinion 24 on the operation lever 21 side, the other pinion 24 rotates, and the respective operating rods 11, 11 extend or contract.

Next, the base portion 22 of the operation lever 21
As shown in FIG. 5, a lock portion 29 having a protrusion at the tip end and being urged in the unlocking direction by a spring 28 to restrict the movement of the operation lever 21 is provided.

On the other hand, on the wall surface of the pillar main body 6, receiving portions 31 and 32 formed of holes into which the protrusions of the lock portion 29 are fitted are provided through. In the present embodiment, the operation lever 21 is restrained at a downward position displaced by 180 degrees from a vertical upward position, and accordingly, a position immediately below the rotation shaft 23 (FIG. 180 °), the first receiving portion 31 is formed, and the second receiving portion 32 is positioned directly above (0 °).
Are drilled.

Therefore, to rotate the operation lever 21,
First, the lock portion 29 is pulled outward to remove the protrusion at the tip from the first receiving portion 31 (or the second receiving portion 32), and the free operation lever 21 is rotated by 180 degrees. Then, the second receiving portion 32 (or the first receiving portion 31) and the protrusion at the tip of the lock portion 29 are aligned at that position, and the protrusion is immersed in the hole, and is automatically locked at that position. For further rotation, the lock portion 29 may be pulled outward and removed as described above.

Therefore, in this embodiment, FIG. 4 shows the case where the pillar 5 is the shortest, and the total height of the table 1 is 650.
mm (see FIG. 2). In this state, the operation lever 21
Is vertically upward, and the rack 12 of the operating rod 11 is displaced to the upper end position.

On the other hand, on the pillar 5 side, as shown in FIG. 7, the pillar main body 6 is lowered to the lowermost position of the outer cylindrical portion 7, and the pillar 5 has the shortest length. In this state, the lock portion 29 of the operation lever 21 protrudes into the first receiving portion 31 and is fixed.

Then, when the lock is released and the operating lever 21 is rotated 180 degrees clockwise in FIG. 8 from the state of FIG. 4 as shown in FIG. 24 is rotated half a clockwise in the figure, and the rack 12 is lowered to half its stroke.

Thus, the operating rod 11 integrated with the rack 12
Is lowered while being guided by the first and second guide cylinder portions 15 and 16, and the driven rod 1 integrally formed via the connecting plate 17 is provided.
3 also descends while being guided by the first and second guide cylinder portions 15 and 16.

Then, as shown in FIG. 9, on the side of the pillar 5, the outer cylinder 7 is pushed down with respect to the pillar main body 6 until the lower end of the pillar main body 6 is in the middle position. The eye height is 700 mm (see FIG. 2). In this state, as described above, the operation lever 21 is
Project into the second receiving portion 32 and are fixed.

Further, when the lock is released and the operation lever 21 is rotated 180 degrees clockwise in the figure as shown in FIG. 10 from the state of FIG. 8 and the operation lever 21 is displaced upward from below, In conjunction with the pinion 2 via the rotation shaft 23
4 is further rotated one half clockwise in the figure to lower the rack 12 to its stroke end.

The operating rod 11 integrated with the rack 12 descends while being guided by the first and second guide cylinders 15 and 16 as described above, and the driven rod 13 integrally formed via the connecting plate 17 is also provided. Similarly, it further descends while being guided by the first and second guide cylinder portions 15 and 16.

On the pillar 5 side, as shown in FIG. 11, the outer cylindrical portion 7 is pushed down with respect to the pillar body 6 until the lower end of the pillar body 6 is at an upper position, so that the table 1 has two steps. The total height is 750 mm, which is the length of the eyes (see FIG. 2). In this state, the lock portion 29 of the operation lever 21 protrudes into the first receiving portion 31 and is fixed as described above.

Conversely, in order to lower the height of the table, the operation lever 21 is rotated in the opposite direction and the pinion 24 is rotated in the opposite direction, thereby raising and extending the rack 12 in two steps. Can be done.

In the above embodiment, the height of the table is adjusted by 6
Although the height can be adjusted in two stages of 650 mm and 700 mm based on 00 mm, it may be one stage or three or more stages. In addition, although it is possible to smoothly move up and down by providing the driven rod 13, it is also possible to provide only the operating rod 11. Further, although the lock portion is configured to restrict the movement of the operation lever, the lock portion may be configured to restrict any one of the rack, the pinion, and the rotation shaft. Further, the table may be a folding type or a fixed type. In other words, it goes without saying that various design changes can be made without departing from the scope of the present invention.

[0027]

As described above, according to the present invention, the height of the pedestal is adjusted by the engagement force using the rack and the pinion, so that the height can be reliably and easily adjusted with a simple structure. . Further, if the main body of the pillar has a flat elliptical cross-section and a pair of an operating rod and a driven rod is provided to be moved up and down, smooth ascending and descending with less rattling can be performed. In addition, the height is fixed by fixing the operation lever by the lock portion, and the rack and the pinion are stored in the pillars, so that the rack and the pinion are safely protected even when an external impact is applied.

[Brief description of the drawings]

FIG. 1 is a side view showing a disassembled state of a folding table in a state where a top plate of the folding table is folded.

FIG. 2 is a side view for explaining two-stage height adjustment in a state where the top plate is expanded.

FIG. 3 is a front view of the table in a developed state.

FIG. 4 is a cross-sectional view showing an upper portion of a pillar at a reference height.

FIG. 5 is a sectional view of a main part for explaining the inside of the pillar main body.

FIG. 6 is a cross-sectional view showing an interlocking structure of a rack and a pinion between pillars.

FIG. 7 is a sectional view showing a lower portion of a pillar corresponding to FIG. 4;

FIG. 8 is a cross-sectional view showing the upper portion of the pillar when the height of the first step is adjusted.

FIG. 9 is a sectional view showing a lower portion of the pillar corresponding to FIG. 8;

FIG. 10 is a cross-sectional view showing an upper portion of a pillar when height adjustment of a second step is performed.

FIG. 11 is a sectional view showing a lower portion of the pillar corresponding to FIG. 10;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 folding table 2 top plate 3 top plate support frame 4 bracket 5 pedestal 6 pedestal main body 7 outer cylinder portion 8 pedestal 9 side beam portion 10 caster 11 operating rod 12 rack 13 driven rod 15 first guide cylinder 16 2nd guide cylinder part 17 Connecting plate 21 Operating lever 22 Base part 23 Rotating shaft 24 Pinion 25 Connecting rod 26 Connecting pipe 28 Spring 29 Lock part 31 First receiving part 32 Second receiving part

Claims (3)

[Claims] 1. A height-adjustable table capable of adjusting a height of a pillar of a table in a plurality of stages, wherein the pillar is slidably provided between a pillar body made of a pipe and a lower portion of the pillar body. An outer cylinder part to be fitted, and a footrest fixed to the outer cylinder part, a rack is provided in the upper part in the pillar main body, and the operating rod whose lower part is fixed to the footrest side is slidable. A pinion that meshes with the rack is provided inside the pedestal body coaxially with the rotation axis of the operation lever provided outside the pedestal, and the rack is raised and lowered via the pinion by rotation of the operation lever, and the pedestal body is A height-adjustable table characterized by height adjustment by expanding and contracting. 2. A top plate is pivotally attached to the upper part of the pillar main body so as to be freely foldable, and a lock receiving part is provided at a predetermined position of the pillar main body. The height-adjustable table according to claim 1, further comprising a lock portion that is urged in a lock direction to lock the portion. 3. The pedestal main body is formed of a pipe having a substantially flat elliptical cross section. An operating rod is slidably incorporated on one side, and a driven rod connected to the operating rod is slidably mounted on the other side. The height-adjustable table according to claim 1, further comprising a guide tube portion that is built-in and guides each of the operating rod and the driven rod to move up and down.