JP2000210129A - Height-adjustable table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a height-adjustable table which is height-adjustable with simple operation to an operation part. SOLUTION: A leg column has a lower leg portion 11 provided on an installation plane in vertically extending relation and a pipe shaped slidable leg column portion 12 with its upper part connected to a ceiling 3 and its lower part externally fitted to the lower leg portion 11 in a vertically slidable manner. A height- adjustable table includes an operating member 15 having an operation part 9 outside the slidable leg column portion 12 and adapted to be rotated in the hollow portion of the slidable leg column portion 12 with the operation of the operation part 9 and displaced up and down, a ring member 16 pivotally mounted at its ends between the operating member 15 and the lower leg portion 11 for elevating the slidable leg column portion 12 and a locking means 15a for locking the position of the slidable leg column portion 12 to be elevated up.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a table capable of raising and lowering a height of a pillar with one touch.

[0002]

2. Description of the Related Art Conventionally, in order to change the height of a table, for example, a pillar has a double-pipe structure, a plurality of holes are provided on an outer tube up and down, and a selected hole and a hole provided in an inner tube are provided. There is known a structure in which the height is adjusted by adjusting screws through a screw or a pin.
However, the above structure has a drawback that the height of the pillars and the attachment and detachment of the pins are individually performed, which is troublesome and complicated.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a main problem thereof is to provide a height-variable table capable of switching the height by one-touch operation of an operation unit. It is in.

[0004]

According to the present invention, in order to solve the above-mentioned problems, according to the first aspect of the present invention, a pillar is provided on an installation surface side and extends vertically, and an upper portion is provided on a top plate side. And a lower part formed of a pipe-shaped sliding pillar that is fitted to the lower leg so as to be slidable in the vertical direction, and has an operating part outside the sliding pillar, An operation piece that rotates in the hollow portion of the sliding pillar portion and is vertically displaced by the operation of the portion, and a link member that is pivotally mounted at both ends between the operating piece and the lower leg portion to raise and lower the sliding pillar portion. And locking means for fixing the raised position of the sliding pillar. According to the second aspect of the present invention, the lower leg portion is composed of a base piece standing upright on the footrest, and a lower leg tubular portion standing upright on the footrest with a gap below and outside the base piece. The sliding leg portion is externally fitted to the base piece, and the lower leg tube portion is arranged at a position where the sliding leg portion is externally fitted so that the lower end of the sliding leg portion is hidden when ascending and descending. Taking technical measures. Further, in the invention according to claim 3, the operating portion is formed by a tiltable lever piece, and the locking means is provided in the hole formed in the elevating column and the base of the lever piece to form the elevating column. A lock pin that can be engaged with and disengaged from the hole, wherein the lock pin is inserted into the hole at a position where the lever piece is displaced in a direction to raise the sliding pillar, and the locking pin is engaged. Technical measures are taken to fix the raised position of the part. According to the fourth aspect of the present invention, the sliding pillar at the lowering position is urged in the ascending direction, and when the sliding pillar at the rising position descends, the urging means having a buffering action is provided in the pillar. It is taking the technical measures that will be provided. Further, in the invention according to claim 5, the base piece is provided with a guide portion for regulating the coil spring, the lower end of which is placed on the footrest, in an upright posture,
An inwardly protruding pin is fixed to the sliding pillar and abuts against the upper end of the coil spring, and a long hole through which the pin passes is provided on the base piece. Is taking the technical steps of being energized.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment in which the variable height table of the present invention is applied to a folding table will be described below with reference to the drawings. The foldable table 1 shown in FIGS. 1 to 5 includes a pair of left and right legs 2 and a foldable top plate 3 pivotally mounted on the legs 2.

The leg 2 is composed of a leg 5 on which a caster 4 is attached at the lower part, and a pillar 10 erected on the leg 5. A bracket 6 is fixed to the upper end of the pillar 10, and an intermediate position of the top plate support frame 7 fixed to the back surface of the top plate 3 is pivotally connected by a pin P <b> 1.

The pedestal 10 is fixed to the pedestal 5 and extends vertically, and the upper part is connected to the top plate 3 side.
A lower portion is formed of a pipe-shaped sliding pillar portion 12 which is fitted to the lower leg portion 11 so as to be slidable in the vertical direction, and has a built-in height variable mechanism. That is, the lower leg portion 11 is composed of a base piece 13 erected on the leg base 5 and a lower leg cylindrical part 14 erected integrally on the leg base with a gap under the base piece 13 with a gap therebetween. ing. Here, the base piece 13 has a channel-like cross section (see FIG. 9) erected on a bottom plate 14 fitted into the lower leg tube portion 14, and is fixed to the footrest 5 by a fixing screw 14 a via the bottom plate 14. Fixed.

The sliding pillar 12 is connected to the base piece 1.
The lower leg tube portion 14 slides so that the lower end of the sliding leg portion 12 is always hidden (descent as well as upward) as shown in the figure. It is arranged at a position where the moving pillar 12 is fitted to the outside. A rotary shaft 8 is built in the sliding pillar 12, and an operation lever 9 for rotating the rotating shaft 8 is provided outside the sliding pillar 12.

An operating piece 15 is fixed to the rotating shaft 8 so as to be interlocked therewith. The operating piece 15 is formed of a substantially L-shaped lever piece. The upper end of the link member 16 is pivotally attached P2 to the bent portion, and the distal end serves as a stopper 15a to serve as an inner wall of the sliding pillar 12. The rotation of the operating piece 15 in the clockwise direction in FIG. 6 is regulated.

Next, the link member 16 has a substantially rectangular shape, and the lower end is pivotally connected P3 to the upper end of the base piece 13. Therefore, in the extended position shown in FIG. 6, the operating lever 9 is in a position where it falls down with respect to the rotating shaft 8. At this time, the operating piece 15 also falls down with respect to the rotating shaft, and the link member 16 is moved downward. It is arranged at a position where it hangs down and continues to the base piece 13.

Therefore, when the operating lever 9 is rotated 180 degrees and switched right above, as shown in FIG. 7 and FIG. Rotate 180 degrees. With this, the link member 16
Since the upper half overlaps the operation lever 9, the base piece 13
And the rotating shaft 8 are made closer to each other, so that the leg 10 is displaced in the reducing direction and becomes shorter (see FIGS. 7 and 8).

Here, the leg 10 urges the sliding pillar 12 at the lowered position in the ascending direction and has a cushioning effect when the sliding pillar 12 at the rising position descends. A coil spring 18 is built in as a biasing means having the coil spring 18. That is, as shown in FIG. 9, a channel-shaped guide wall 21 is fixed to the channel-shaped base piece 13 so as to face the center to form a cylindrical portion, and the coil spring 18 is provided in the cylindrical portion. It can be inserted. In the illustrated example, a hole is formed at the center of the bottom plate 17 so as to communicate with the hollow of the guide wall 21, and the lower end of the coil spring 18 is placed on the footrest 5.

On the other hand, a fixing pin 19 penetrates and is fixed to the sliding pillar 12, and the fixing pin 19 is arranged so as to abut against an upper end of the coil spring 18. A long hole 20 through which the fixing pin 19 can pass is formed in the base piece 13 so that the fixing pin 19 is not restricted by the base piece 13 when the leg 10 is switched to the shortened position. I have. Thereby, the coil spring 18
Urges the sliding pillar 12 in the descending position in the ascending direction, and has a buffering action when the sliding pillar 12 in the rising position descends.

Thus, the operating lever 9 is moved up and down by 180 degrees.
By rotating the leg 10 degrees, the height of the leg 10 can be switched between two stages, an extended position and a shortened position. And
In the extended position shown in FIG. 6, the stopper 15 a at the tip of the operating piece 15 abuts against the inner wall of the sliding pillar 12 to restrict further rotation of the operating piece 15, so that the extended position is maintained. be able to.

In the shortened position shown in FIG. 7 or FIG.
A lock pin 23 shown in FIG. That is, in the case of the example shown in the drawing, a lock pin 23 having a tip that is freely retractable inward is provided on the base 9 a of the operation lever that integrally fixes the rotating shaft 8 and the operation lever 9. A lock hole 12a for engaging the lock pin 23 is formed at a predetermined position at a corresponding position. Therefore, the operation lever 9 is moved upward by 18
When rotated by 0 degrees, the base 9a and the base 9a work in conjunction with this.
The lock pin 23 provided on the
Rotate 80 degrees.

In this position, the lock pin 23 is
2a. Here, since the lock pin 23 is urged in the lock direction (inward) by the built-in coil spring 24, when the tip is aligned with the lock hole 12a, the lock pin 23 enters and locks, and the operation lever 9 slides. Pillar 1
2 and the shortened position of the leg 10 is maintained.

When returning to the original position, the lock pin 23 is pulled out from the lock hole 12a to make the operation lever 9 rotatable.
It only has to be rotated downward. In this embodiment, the configuration in which the operation lever is locked has been exemplified. However, instead of the operation lever, the rotating shaft 8, the operating piece 15, the link member 16, the base piece 13, and the like are fixed to the sliding pillar 12 in the extended position. A configuration may be used. Alternatively, a separate locking member may be provided for each. The above-mentioned leg height variable mechanism,
Although formed on each leg 10, the rotation axis 8
Is formed coaxially and bridged between the left and right legs 10, and can be rotated by an operation lever 9 provided on one side. The rotating shaft 8 is built in a hollow cross frame 22 laid between the legs 10.

Next, the table 1 of the present embodiment has a configuration in which the top plate 3 can be folded. That is, the bracket 6 is fixed to the upper end of the sliding pillar 12, and the top plate supporting frame 7 is pivotally attached by the pin P <b> 1. A base end of a socket-shaped protective cover 30 is pivotally connected to the top plate support frame 7 by a pivot P4 in front of the pivotal position of the pin P1. The protective cover 30 holds the top plate 3 to the top plate support frame 6 in a folded posture in which the top plate stands vertically.
The operator covers the gap between the bracket and the bracket 6 so that the operator does not pinch his / her fingers, and the tip piece 30a stands up. Therefore, when the top plate is folded, the protective cover 30 closes the gap in an oblique posture as shown in FIG.
0a is locked.

When the top plate 3 is unfolded, the protective cover 30 hangs down so as to fit over the sliding pillar 12 as shown by phantom lines in FIGS. 6 and 8. At this time, the pivot P4 enters the middle position of the bracket 6, and the deployed posture is held by the deployed lock mechanism built in the sliding pillar 12. As shown in FIG. 11, the deployment lock mechanism includes a rotating shaft 31, a handle 32 provided outside the sliding pillar 12 for rotating the rotating shaft 31, and an inner portion of the sliding pillar 12. , A substantially L-shaped operating lever 33 fixed to the rotating shaft 31, a deployment lock piece 34 pivotally attached to the operating lever 33 via a pin P5, and an urging member for urging the operating lever 33 in the locking direction. It comprises a coil spring 36 as an example of the means. Here, the deployment lock piece 34 is configured to penetrate through the sliding leg 12 and protrude upward, with the tip protruding into the bracket 6. The upper portion of the deployment lock piece 34 includes a hook portion 34b for hooking the deployment lock piece 34, a guide portion 34a for retreating the hook portion 34b when the pivot P4 is lowered, and a tip portion 30a of the cover together with the base portion 37. And a receiving piece 34c to be locked. Thus, when the top 3 rotates from the folded position to the expanded position, the expansion lock piece 34 is pivoted by the pivot P4.
Can reciprocate to receive the pivot P4 and hook it with the hook 34b. When the top plate is folded, the handle 34 is tilted in the release direction, whereby the hook 34b is removed from the pivot P4, and the top plate 3 can be tilted in the vertical direction.
This deployment lock mechanism is provided on each of the left and right legs 10, and the rotation shaft 31 is formed coaxially and spans between the left and right legs 10, and is rotated by a handle 32 provided on one side. It is possible to do it. The rotating shaft 31 is built in the cross frame 22 similarly to the rotating shaft 8 of the height variable mechanism.

In the above embodiment, the folding table has been described. However, the table may be a table in which a top plate is fixed to a leg. In other words, it goes without saying that various design changes can be made without departing from the scope of the present invention.

[0021]

As described above in detail, according to the height variable table according to the present invention, the height of the left and right legs can be changed with one touch by switching the operation lever, so that anyone can easily and easily change the table. Height can be changed. Also, since the mechanism is built in the leg, it is hard to break down and has high reliability.

[Brief description of the drawings]

FIG. 1 is a side view at the time of extension showing an embodiment of a height variable table of the present invention.

FIG. 2 is a side view of the variable table when shortened.

FIG. 3 is a side view of a folded state.

FIG. 4 is a plan view showing a top plate by virtual lines.

FIG. 5 is a front view in which an intermediate portion is omitted.

FIG. 6 is a cross-sectional view of a main part at the time of extension.

FIG. 7 is a sectional view of a main part at the time of shortening.

FIG. 8 is a cross-sectional view of a main part when shortened from different angles.

FIG. 9 is a cross section of a leg.

FIG. 10 is a sectional view of a main part near an operation lever.

FIG. 11 is a sectional view of a main part of the deployment lock mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Foldable table 2 ... Leg part 3 ... Top plate 4 ... Caster 5 ... Footrest 7 ... Top plate support frame 9 ... Operation lever 10 ... Leg column 12 ... Sliding leg column 13 ... Base piece 14 ... Lower leg cylinder Department

Claims (5)

[Claims] 1. A pipe having a lower leg provided on an installation surface side and extending vertically, an upper portion connected to a top plate side, and a lower portion externally slidably fitted to the lower leg in a vertical direction. An operating member having an operating portion outside the sliding pillar portion, the operating piece being rotated in the hollow portion of the sliding pillar portion by the operation of the operating portion and vertically displaced. A link member having both ends pivotally connected between the operating piece and the lower leg to lift and lower the sliding pillar, and locking means for fixing a rising position of the sliding pillar. Variable height table. 2. A lower leg portion comprising: a base piece standing upright on a footrest; and a lower leg cylinder portion standing upright on the footrest with a gap under and below the base piece. The moving leg portion is externally fitted to the base piece, and the lower leg cylindrical portion is arranged at a position where the sliding leg portion is externally fitted so that the lower end of the sliding leg portion is hidden when ascending and descending. Item 3. The height variable table according to Item 1. 3. An operation part comprising a tiltable lever piece, and a lock means is provided in a hole formed in the elevating column and a hole formed in the base of the lever piece and in the elevating column. The lock pin is inserted into the hole at a position where the lever piece is displaced in a direction to raise the sliding pillar, and the locking pin is engaged with the locking pin. The height variable table according to claim 1 or 2, wherein the height is fixed. 4. A biasing means for urging the sliding column at the lower position in the ascending direction and having a buffering function when the sliding column at the upper position descends is provided in the column. 4. The height variable table according to claim 1, wherein the height variable table comprises: 5. A guide portion for restricting a coil spring whose lower end is mounted on a footrest to an upright posture is provided on a base piece, and a pin protruding inward is fixed to a sliding leg portion to fix the coil spring. 5. The base plate according to claim 1, wherein the base piece has an elongated hole through which the pin passes, and the coil spring urges the sliding pillar in the ascending direction. 6. Either height adjustable table.