JPH0742333Y2 - Height adjuster with multiple legs - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a height adjusting device having a plurality of elastic legs used for a table, a workbench, a base for construction, a chair and the like. In particular, this invention relates to a device that allows a plurality of legs to expand and contract together to adjust the height.

[0002]

2. Description of the Related Art A device for adjusting the height by expanding and contracting a plurality of legs together is convenient because it can be moved up and down while holding a table or the like in a horizontal posture. As a height adjusting device that achieves this, a device using a nut and a threaded rod has been developed. The height adjusting device of this structure is adapted to move the nut along the threaded rod by rotating the threaded rod. The height adjustment device of this structure is
It is described in the following publication.

Japanese Utility Model Publication No. 58-36834 Japanese Utility Model Publication No. 58-195530 Japanese Utility Model Publication No. 59-34636 Japanese Utility Model Publication No. 60-10535 Japanese Utility Model Publication No. 61-174432

The height adjusting devices described in these publications have a threaded rod built in the leg. A nut is screwed into the threaded rod, and this nut is fixed to the telescopic leg. The screw rod built in each leg is connected to the drive shaft via a bevel gear, a worm gear, or the like. Rotating the drive shaft causes all threaded rods to rotate together through the gears. When the threaded rod is rotated, the nut moves up and down along it. When the nut moves up and down, the telescopic legs fixed to it move up and down to extend and contract all legs.

[0005]

In the height adjusting device described in the above publication, when the drive shaft is rotated, all the legs expand and contract together. Therefore, when the handle is connected to the drive shaft or the drive shaft is rotated by the motor, the height of the table or the like to which the telescopic legs are connected can be adjusted in a horizontal posture. In normal use, all legs can be moved up and down together for convenient use. However, when assembled, the height of each leg must be adjusted so that all legs are at the same height. This is because a table or the like cannot be held horizontally unless all the legs have the same height.

The height adjusting device described in the above publication is
You cannot easily adjust the height of each telescopic leg. For this reason, there is a drawback that it takes time to accurately adjust the heights of the plurality of legs in the assembled state. This is because all the threaded rods are connected to the drive shaft via gears.

The present invention was developed for the purpose of solving this drawback. The important purpose of this device is
It is an object of the present invention to provide a height adjusting device having a plurality of legs in which the height of the plurality of telescopic legs can be easily and easily adjusted.

[0008]

A height adjusting device having a plurality of legs according to the present invention has the following structure in order to achieve the above object. The height adjusting device includes a plurality of leg bodies 1
And an extendable leg 2 that is elastically connected to the leg body 1,
A nut 3 fixed to the extendable leg 2, a screw rod 4 into which the nut 3 is screwed, extends axially in the leg body 1 and is rotatably incorporated, and a bevel gear 9 is attached to the screw rod 4.
A drive shaft 5 connected via the drive shaft 5 and a rotating means 6 for rotating the drive shaft 5 are provided.

When the drive shaft 5 is rotated by the rotating means 6, the drive shaft 5 rotates the screw rod 4. When the screw rod 4 is rotated, the nut 3 screwed into the screw rod 4 moves along the screw rod 4, and the plurality of telescopic legs 2 are telescopically extended with respect to the leg body 1. .

Further, the height adjusting device of the present invention is characterized by having the following unique structure. One end of the screw rod 4 is rotatably supported by the bearing member 7. The bearing member 7 that supports the screw rod 4 is connected to the base 10 via a connection position changing member 8 that can release the meshing between the screw rod 4 and the bevel gear 9 of the drive shaft 5. When the engagement between the screw rod 4 and the bevel gear 9 of the drive shaft 5 is released by the connecting position changing member 8, the screw rod 4 can be freely rotated to adjust the height of the telescopic leg 2.

[0011]

The height adjusting device having a plurality of legs of the present invention,
The height of the telescopic legs can be adjusted independently as follows. The position of the bearing member 7 supporting the screw rod 4 is moved by the connecting position changing member 8. When the screw rod 4 is moved, the engagement between the screw rod 4 and the bevel gear 9 of the drive shaft 5 is released. In this state, the screw rod 4 is not connected to the drive shaft 5 via the bevel gear 9. Therefore, the screw rod 4 has the drive shaft 5
Can be rotated independently without rotating. When the screw rod 4 is rotated, the nut 3 screwed into the screw rod 4 moves up and down. When the nut 3 moves up and down, the height of the telescopic leg 2 can be adjusted. After adjusting the height of the telescopic leg 2, the bearing member 7 is fixed to the position where the screw rod 4 and the bevel gear 9 of the drive shaft 5 mesh with each other by the connecting position changing member 8. In this state, the bevel gear 9 meshes with the screw rod 4 and the drive shaft 5, and when the drive shaft 5 is rotated, all the screw rods 4 are rotated and the telescopic legs 2 move up and down together.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a height adjusting device for embodying the technical idea of the present invention, and the present invention does not specify the height adjusting device to the following structure.

Further, in this specification, in order to make it easy to understand the scope of claims for utility model registration, the numbers corresponding to the members shown in the embodiment are referred to as "columns for claims for utility model registration" and "columns for action". , And "members for solving the problem". However, the members shown in the scope of claims for utility model registration are by no means limited to the members of the embodiment.

The height adjusting device having a plurality of legs shown in FIG. 1 has four legs fixed to the end of a base 10. Base 10
Is a C-shaped steel connected to the X-shaped line, with the drive shaft 5 in the center.
A handle 13 which is a rotating means 6 for rotating the is provided. The handle 13 vertically penetrates the base 10 and is attached to the base 10 so as to be rotatable. The bevel gear 11 is fixed to the upper end of the handle 13. The bevel gear 11 of the handle 13 meshes with the bevel gear 12 of the drive shaft 5.

The base 10, which is a C-shaped steel, has a drive shaft 5 vertically extending therein. The drive shaft 5 is rotatably supported at both ends and is disposed inside the base 10. Bevel gears 9 and 12 are fixed to both ends of the drive shaft 5. The bevel gear 12 at one end of the drive shaft 5 meshes with the bevel gear 11 of the handle 13, and the bevel gear 9 at the other end meshes with the bevel gear 9 of the screw rod 4.

The legs are composed of a leg body 1 which is vertically fixed to a base 10 and telescopic legs 2 which are telescopically connected to the leg body 1. The leg body 1 is cylindrical and is fixed to the end of the base 10 by welding at right angles. The telescopic leg 2 is slidably inserted inside the leg body 1. Therefore, the telescopic leg 2
It is a cylinder whose outer diameter is slightly smaller than the inner diameter of the leg body 1.

A screw rod 4 is arranged inside the telescopic leg 2. The bevel gear 9 is fixed to the upper end of the screw rod 4. This bevel gear 9 meshes with the bevel gear 9 of the drive shaft 5,
Is rotated by. When the screw rod 4 is rotated, the telescopic leg 2 moves up and down. Therefore, the nut 3 is screwed into the threaded rod 4, and the nut 3 is fixed to the lower end of the telescopic leg 2. When the screw rod 4 is rotated, the nut 3 moves up and down along the screw rod 4. When the nut 3 moves up and down, the telescopic leg 2 to which the nut 3 is fixed moves up and down.

The screw rod 4 is supported at both upper and lower ends so as to be rotatable. The screw rod 4 has a lower end connected to the leg body 1 and an upper end connected to the base 10. At the lower end of the screw rod 4, a bearing 14 that rotatably supports the screw rod 4 is fixed to the inner surface of the leg body 1 via an arm. At the upper end of the screw rod 4, a bearing member 7 that rotatably supports the screw rod 4 and a connecting position changing member 8
Therefore, it is attached to the base 10.

The connecting position changing member 8 shown in FIG. 2 includes a connecting rod 8A connected to the bearing member 7 and the connecting rod 8
A fixing base 8B for fixing A to the base 10, and a connecting rod 8A
And a set screw 8C for fixing the same to the fixed base 8B. The connecting rod 8A has its tip bent downward and is fixed to the bearing member 7. The fixed base 8B has a connection hole 15 into which the connection rod 8A is inserted and fixed. Further, in order to fix the connecting rod 8A inserted through the connecting hole 15, the fixing base 8B is
A stop hole is provided so as to communicate with the connecting hole 15. The stop hole is a female screw hole, and a set screw 8C is screwed in here to fix the connecting rod 8A. When the set screw 8C is loosened, the connecting rod 8A
Is inserted into the connecting hole 15 so that it can be put in and taken out. When the set screw 8C is tightened, the connecting rod 8A is fixed to the fixed base 8B.
Fixed to.

The connecting position changing member of this structure adjusts the height of the telescopic leg as follows. Loosen the set screw 8C and attach the connecting rod 8A to the fixed base 8B.
Pull out from. When the connecting rod 8A is pulled out from the fixed base 8B,
The engagement between the screw rod 4 and the bevel gear 9 of the drive shaft 5 is released. Therefore, only the screw rod 4 can be rotated without rotating the drive shaft 5. In this state, the screw rod 4 is rotated to adjust the vertical position of the telescopic leg 2. After adjusting the height of the telescopic leg 2, the screw rod 4 and the drive shaft 5
With the bevel gear 9 engaged, the set screw 8C is screwed in to fix the connecting rod 8A to the fixed base 8B. The height adjustment device with four telescopic legs 2 is
Adjust the height of all telescopic legs 2 in the process of
The height of the remaining three telescopic legs 2 is adjusted with reference to the one telescopic leg 2.

The connecting position changing member 8 shown in FIG. 2 has a feature that the engagement between the screw rod 4 and the bevel gear 9 of the drive shaft 5 can be easily released by loosening the set screw 8C. However, the height adjusting device of the present invention does not specify the structure of the connecting position changing member as shown in FIG. The connecting position changing member may be any mechanism that can release the meshing between the screw rod and the gear of the drive shaft in a single letter, such as a structure in which the connecting rod fixed to the bearing member is fastened or fixed with a band that can be released. Can be adopted.

[0022]

The height adjusting device having a plurality of legs according to the present invention has a feature that the height of each leg can be independently and easily adjusted. This is because the bearing member that rotatably supports the screw rod is attached to the base via the connecting position changing member. The connection position changing member changes the meshing position of the screw rod and the gear fixed to the drive shaft. When the screw rod gear is separated from the drive shaft gear, the screw rod is free to rotate. When the screw rod is rotated in this state, one telescopic leg can be expanded and contracted to adjust the height. After adjusting the height of the telescopic legs, when the screw rod and the gear of the drive shaft are engaged, all the telescopic legs expand and contract together vertically. As described above, the height adjusting device of the present invention can easily release the meshing of the gears of the respective screw rods and the drive shaft with the connecting position changing member, and can be arranged at the meshing position. The height of each leg can be adjusted independently so that all legs can move horizontally.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a height adjusting device having a plurality of legs according to the present invention.

FIG. 2 is a sectional view of a main part of the height adjusting device shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Leg body 2 ... Telescopic leg 3 ... Nut 4 ... Screw rod 5 ... Drive shaft 6 ... Rotating means 7 ... Bearing member 8 ... Connection position changing member 8A ... Connection rod 8B ... Fixing base 8C
... Set screw 9 ... Bevel gear 10 ... Base 11 ... Bevel gear 12 ... Bevel gear 13 ... Handle 14 ... Bearing 15 ... Connection hole

Claims (1)

[Scope of utility model registration request] 1. A plurality of leg bodies (1), a telescopic leg (2) extensiblely connected to the leg body (1), and a nut (3) fixed to the telescopic leg (2). The nut (3) is screwed into the leg body (1) to extend axially, and the threaded rod (4) is rotatably incorporated. A drive shaft (5) connected via the drive shaft (5) and a rotating means (6) for rotating the drive shaft (5) are provided. When the drive shaft (5) is rotated by the rotating means (6), the drive shaft (5 ) Rotates the screw rod (4),
The nut (3) screwed into the
Move along (4) and the multiple telescopic legs (2) will move to the leg body (1).
In the height adjusting device configured to be expanded and contracted with respect to each other, one end of the screw rod (4) is rotatably supported by the bearing member (7), and the screw rod (4) is supported. The bearing member (7)
(4) has a plurality of legs characterized by being connected to the base (10) through a connecting position changing member (8) capable of releasing the meshing between the bevel gear (9) of the drive shaft (5) Height adjustment device.