JPH09234117A - Raising/lowering device for table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a raising/lowering device for a table which improves an external appearance by covering respective leg bodies having hydraulic cylinders with covers and whose leg parts are so set not to obstruct a user of the table in putting the legs thereunder. SOLUTION: The whole of each hydraulic cylinder 15 is covered with a cover 16, 17 and when the extension/contraction shaft 18 of a hydraulic cylinder is vertically extended/contracted, the bottom cover 17 and the top cover 16 are slid so as to cover the hydraulic cylinder 15 all the times. This constitution prevents the beauty of the external appearance of the table from being spoiled. Fixing a hydraulic pump under the top board 2 eliminates the hydraulic pump from obstructing a user of the table in putting the legs thereunder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical lifting device for a table, and more particularly, to a vertical table which has a leg portion provided with a hydraulic cylinder which can be expanded and contracted and whose top and bottom can be moved vertically. Lifting equipment.

[0002]

2. Description of the Related Art Conventionally, as a vertical lifting device for a table in which a leg is provided with an extendable hydraulic cylinder and the top plate can be moved up and down using the hydraulic cylinder, it is practically fair.
3207, and Japanese Patent Laid-Open No. 5-253022. In these systems, the height of the table can be freely changed by simultaneously expanding and contracting a plurality of hydraulic cylinders provided on the legs of the table with a hydraulic pump.

[0003]

However, the former one has a structure in which a plurality of hydraulic cylinders themselves support the top plate as legs, so that there is a large difference in outer shape between the outer cylinder portion of the hydraulic cylinder and the telescopic shaft. There was a step at the connection, and the appearance was unsightly. Also, the latter one has a good appearance because the box-shaped legs cover multiple hydraulic cylinders, but in the case of a table that wants to be used from multiple directions, the box-shaped legs can be used as a foot pad for table users. There was a problem that it got in the way.

In order to solve such a problem, the present invention improves the appearance by covering each leg having a hydraulic cylinder with a cover, and the leg does not interfere with the leg putting of a table user. It is an object of the present invention to provide a vertical lifting device for such a table.

[0005]

In order to achieve the above-mentioned object, a vertical lifting device for a table according to the present invention is provided with a top plate, a plurality of leg frames fixed to the lower surface of the top plate, and fixed to each leg frame. Supplying the same amount of oil to each hydraulic cylinder at the same time with a hydraulic cylinder that has a telescopic shaft that can expand and contract in the vertical direction,
A hydraulic pump fixed to the bottom surface of the discharging top plate, a lower cover joined to the lower end of the expansion / contraction shaft of the hydraulic cylinder, and an upper cover fitted to the lower cover so as to be vertically slidable. There is. According to this feature, the whole of each hydraulic cylinder is covered with the cover, and even if the expansion / contraction axis of the hydraulic cylinder is vertically expanded / contracted, the lower cover and the upper cover slide to constantly cover the hydraulic cylinder, The appearance of the table is not damaged. Also,
By fixing the hydraulic pump to the lower surface of the top plate, the hydraulic pump does not hinder the footrest of the table user.

In the table vertical lifting device of the present invention, the oil insertion hose extending from the upper part of the hydraulic cylinder is connected to the hydraulic pump through an insertion hole provided in the upper part of the upper cover that does not interfere with the lower cover. It is preferable.
By doing this, the hose is sandwiched by the cover body that moves relative to each other when the top plate moves up and down, and it does not hinder oil insertion or damage the hose, and the hose does not interfere with the table user. Never becomes.

In the table up-and-down lifting device of the present invention, a part of the side piece of the top plate is used in proximity to a wall surface, a partition, or the rear end portion of another table, and the hydraulic pump is used for the wall surface or the like. It is preferable that the hydraulic pump and the user side are arranged along a side close to the above, and at least the hydraulic pump and the user side are divided by a curtain plate that is provided so as to extend downward from the lower surface of the top plate. By doing so, it is possible to efficiently cover the hydraulic pump with fewer members, improve the appearance, and protect the hydraulic pump.

The table up-and-down lifting device of the present invention is a table in which the top plate is formed in a substantially triangular shape, and the legs are formed in the corner portions of the substantially triangular shape. It is preferable that the curtain plate is extended to the vicinity of the three legs so as to be divided by the plate. By doing so, not only the hydraulic pump but also the hose for supplying oil can be completely covered so that it cannot be seen from the outside.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. First, FIGS. 1 and 2 are plan views of a table 1 equipped with an up-and-down lifting device according to an embodiment of the present invention. Each front view is shown. In this table 1, as shown in FIG. 1, a top plate 2 is formed in a substantially right triangle shape, and mainly the side edges 2a and 2b of the top plate 2 are wall surfaces, partitions,
Alternatively, it can be used by being brought into contact with the rear end portion of another table. The side edge 2c is formed in a curved shape so that the user can easily use it.

On the lower surface of each corner of the top plate 2, a leg body 3 which is vertically expandable and contractible is fixedly mounted via a mounting plate 4. Reference numeral 5 is a hydraulic pump including a cylinder 6 and a pump device 8 that supplies and discharges a liquid into the cylinder 6 by the operation of a motor 7. The cylinder 6 is provided with a hose 9 extending from its tip. , Is connected to a hydraulic cylinder installed inside each leg 3 described later. still,
Reference numeral 10 is a cord connected to a power source and a switch portion (not particularly shown) of the motor 7 and the pump device 8.

The hydraulic pump 5, the hose 9 and the cord 1
0 and the like are all fixed to the lower surface of the top plate 2, and particularly in the hydraulic pump 5, the cylinder 6 has the side 2 of the top plate 2.
Since it is arranged along a, it does not hinder the foot use of the table user.

Further, a curtain plate 11 depending from the lower surface of the top plate 2 is disposed on the front side of the hydraulic pump 5, that is, on the side of the top plate 2 in the direction of the side 2c. As described above, the hydraulic pump 5 is not visible from the side 2c side, that is, the user side, and the hydraulic pump 5 is protected from being damaged by the user's foot.

Further, particularly in the present embodiment, the side edge 2b of the top plate 2 is also used by being brought into contact with a wall surface, a partition, or the rear end portion of another table, etc. Reference numeral 11 is substantially L so as to cover the hose 9 arranged along the side edge 2b as shown by the dotted line in FIG.
It is formed in a letter shape.

As shown in FIGS. 3A, 3B, and 4, the leg 3 is fixed by welding or the like to the mounting plate 4 which is fixed to the lower surface of the top plate 2 with screws 12. The leg frame 13 includes a fixed leg frame 13, a hydraulic cylinder 15 fixed in the leg frame 13, and an upper cover 16 and a lower cover 17 that cover the outer peripheries thereof.

The leg frame 13 is formed in a substantially U-shaped cross section as shown in FIG. 4, and the hydraulic cylinder 15 can be fixed to the back plate 13a of the leg frame 13 with screws 14. It can be easily removed and installed for replacement and maintenance. The hose 9 extending from the upper end of the hydraulic cylinder 15 can be easily inserted to the outside of the leg frame 13 through an opening 24 formed in the vertical direction of the front surface of the leg frame 13.

A leg member 20 having casters 19 is attached to the lower end of a rod 18 which is telescopically fitted in the hydraulic cylinder 15 via a bolt 21. The leg member 20 has a cylindrical shape on the upper outer periphery thereof. The lower cover 17 is fitted. A leg frame 13 having a hydraulic cylinder 15 and a cylindrical upper cover 16 that covers the outer periphery of the leg frame 13 are fitted into the upper opening of the lower cover 17.

On the upper part of the upper cover 17, a mounting plate 4 is attached.
16a is formed to cover the lower surface of the upper cover 17, and the upper cover 17 has screws 2 penetrating the cover 16a and the mounting plate 4.
2 is attached to the lower surface of the top plate 2.

The hose 9 of the hydraulic cylinder 15 is
It can be connected to the hydraulic pump 5 through a hole (not shown) provided in the cover 16a that does not interfere with the lower cover 17.

A ring member 23 whose inner peripheral surface is in sliding contact with the outer peripheral surface of the upper cover 16 is provided in the upper opening of the lower cover 17.
Are provided, and the outer peripheral surface of the upper cover 16 and the lower cover 17 are provided.
Since the gap between the inner peripheral surface of the top and the inner peripheral surface of the top is closed, there is no possibility that some dust or the like is caught in the gap and interferes with the elevation of the top plate 2 or the fingers of the user are caught. .

Next, the operation of the table up-and-down lifting device of the present embodiment thus constructed will be described. First, when raising the top plate 2 of the table 1, the user needs to move the hydraulic pump 5
The motor 7 and the pump device 8 are operated via the switch unit connected to the. Then, the liquid in the cylinder 6 is synchronously delivered to each hydraulic cylinder 15 of each leg 3 via the hose 9 in the same amount.

Then, as shown in FIG. 3B, the hydraulic cylinder 15 is extended upward with the rod 18 as a base axis, and the top plate 2 is raised. At this time, the upper cover 16 also rises together with the top plate 2. And top plate 2
If the switch is turned off when reaches the desired height position, the supply of fluid from the hydraulic pump 5 to the hydraulic cylinder 15 is stopped, and the top plate 2 is stopped at an appropriate position.

Further, in order to lower the top plate 2, it is sufficient to drive the motor and pump device 8 through the switch portion in the reverse direction to the above to contract the rod 18 of the hydraulic cylinder 15.

As described above, in the vertical lifting device for the table according to the embodiment of the present invention, each hydraulic cylinder supporting the top plate is covered with a separate cover, and the hydraulic cylinder is vertically expanded and contracted. However, since the lower cover and the upper cover are slid so that the outer circumference of the hydraulic cylinder is always covered, the appearance does not deteriorate even if the table is set at an arbitrary height.

Further, since the hydraulic pump is fixed to the lower surface of the top plate, the hydraulic pump does not hinder the footrest of the table user.

Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and even if there are changes and additions without departing from the gist of the present invention. Included in the invention.

For example, in this embodiment, the upper cover 1
6 is slidably inserted in the lower cover 17,
On the contrary, the upper cover 16 may be fitted around the lower cover 17.

[0027]

The present invention has the following effects.

(A) According to the invention of claim 1, the whole of each hydraulic cylinder is covered with the cover, and the lower cover and the upper cover are slid even when the expansion and contraction shafts of the hydraulic cylinder are expanded and contracted vertically. Since the hydraulic cylinder is always covered with the table, the appearance of the table is not damaged. Also,
By fixing the hydraulic pump to the lower surface of the top plate, the hydraulic pump does not hinder the footrest of the table user.

(B) According to the second aspect of the invention, the hose is sandwiched by the cover body or the like which moves relative to each other when the top plate is moved up and down.
It does not hinder the passage of oil or damage the hose, and the hose does not interfere with the table user.

(C) According to the third aspect of the invention, the hydraulic pump can be efficiently covered with a smaller number of members, and the appearance can be improved and the hydraulic pump can be protected.

(D) According to the invention of claim 4, not only the hydraulic pump but also the hose for supplying oil can be completely covered so as not to be seen from the outside.

[0032]

[Brief description of drawings]

FIG. 1 is a plan view of a table equipped with a vertical lifting device according to an embodiment of the present invention.

FIG. 2 is a front view of a table equipped with a vertical lifting device according to an embodiment of the present invention.

3A is a sectional view taken along the line AA in FIG. 1, and FIG. 3B is a sectional view showing an action corresponding to FIG.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

[Explanation of symbols]

 1 table 2 top plate 2a, 2b, 2c side 3 leg 4 mounting plate 5 hydraulic pump 6 cylinder 7 motor 8 pump device 9 hose 10 cord 11 curtain plate 12 screw 13 leg frame 14 screw 15 hydraulic cylinder 16 upper cover 17 lower part Cover 18 Rod 19 Caster 20 Leg member 21 Bolt 22 Screw 23 Ring member 24 Opening

Claims (4)

[Claims] 1. A top plate, a plurality of leg frames fixed to the bottom face of the top plate, a hydraulic cylinder fixed to each leg frame and having a telescopic shaft capable of expanding and contracting in the vertical direction, and the same amount of each hydraulic cylinder at the same time. A hydraulic pump fixed to the lower surface of the top plate that supplies and discharges oil, a lower cover joined to the lower end of the expansion and contraction shaft of the hydraulic cylinder, and an upper cover that is vertically slidably fitted to the lower cover are provided. A vertical lifting device for a table, which is characterized by that. 2. The table according to claim 1, wherein the hose for oil insertion extending from the upper part of the hydraulic cylinder is connected to the hydraulic pump through an insertion hole provided in the upper part of the upper cover that does not interfere with the lower cover. Vertical lifting device. 3. A part of a side piece of the top plate is used near a wall surface, a partition, or a rear end portion of another table, and the hydraulic pump is arranged along a side near the wall surface. The vertical lifting device for a table according to claim 1 or 2, wherein the vertical pump is arranged, and at least the hydraulic pump and the user side are partitioned by a curtain plate that extends downward from a lower surface of the top plate. 4. A table in which a top plate has a substantially triangular shape and legs are formed at the corners of the substantially triangular shape so that the hydraulic pump and the hose are separated from the user side by the curtain plate.
4. The curtain plate is extended to the vicinity of three legs.
Table vertical lifting device.