JPH0736780B2 - Support - Google Patents

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 support for placing a person or an article such as a chair, a table, a workbench or the like.

[0002]

2. Description of the Related Art As described above, in the case where the height of a chair or the like can be freely adjusted, a sliding portion is provided on a column portion between a base portion of the chair and a mounting table. Many are provided.

[0003]

In the case of the height adjusting chair having such a sliding portion, since the sliding portion is constituted by the friction parts, the weight of a person may increase.
There is a problem that wear progresses and the life is relatively short. Therefore, it is an object of the present invention to provide a robust pedestal whose height can be freely adjusted.

[0004]

In order to achieve the above object, the present invention provides a base part to be placed on a floor, and a mounting table to be placed on the base part for placing articles. And a middle part for connecting the base part and the mounting part to each other, wherein the intermediate part is provided in a lower part of the mounting part so that rotation axes thereof are parallel to each other, and meshes with each other. The opposite
A pair of gears rotatable in one direction and one of the pair of gears
One pair of planetary gears that mesh with one gear as the sun gear
It is provided so that it can be engaged with and disengaged from the other gear of
Roll the planetary gear along with the sun gear to
A gear stop mechanism for stopping the rotation of the pair of gears at an arbitrary position by appropriately meshing with the pair of gears, and an upper end of the pair of gears connected to the lower end of the fulcrum shaft on the base to stop the gears. And a link mechanism that is stopped when the pair of gears is stopped by the mechanism.

[0005]

In this invention, when the gear stop mechanism is released, the pair of gears can freely rotate. Also, the link mechanism connected to the pair of gears can freely expand and contract. Therefore, when the mounting table is moved up and down with the gear stop mechanism being released, the link mechanism expands and contracts accordingly, and at the same time the pair of gears rotates. In this way, when the gear stop mechanism is actuated while the mounting table is lifted up to an appropriate height position to stop the rotation of the pair of gears, the movement of the link mechanism is also stopped and the link mechanism has a fixed height. The mounting table is supported by the legs.

[0006]

Embodiments Embodiments embodying the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.
1 is a front view of a support base according to an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a front view showing a state in which a link mechanism is contracted. In this embodiment, the support base according to the present invention is applied to a chair, and a mounting base part 1 for mounting a person or an article, a base part 2 mounted on the floor, and the mounting base described above. It is composed of an intermediate portion 3 connecting the portion and the base portion. The configuration of the intermediate section 3 will be described below. An upper frame 4 having a U-shaped cross-section in a side view is fixed to the lower surface of the mounting table portion 1 which is horizontally provided, and a pair of parallel shafts 5a and 5b horizontally attached to the upper frame 4 are provided with a pair of Gears 6a and 6b are mutually
It is rotatably supported in opposite directions by meshing with the urchin . The first link 7a integral upper Symbol gear 6a, a 6b, 7b
At the free end of the second link 9 through the pins 8a and 8b.
a and 9b are swingably connected. The second links 9a and 9b are connected to each other in an X shape by a central pin 10 and further connected to third links 12a and 12b at their lower ends via pins 11a and 11b. Further, the third links 12a and 12b have a horizontal parallel shaft 14 supported by a lower frame 13 fixed to the base 2.
Gears 15a and 15b rotatably supported by a and 14b
It is formed integrally with. In this embodiment, the gear 1
5a and 15b mesh with each other, but such meshing is not always necessary, and the gears 15a and 15b are omitted, and the third links 12a and 12b are directly connected to the parallel shafts 14a and 1b.
It may be rotatably supported by 4b. Furthermore, in this embodiment, parallel axes 5a, 5b one of which lever 16 (5a) is rotatably supported approval, other gear 6b the one gear 6a on the lever 16 meshes with the sun gear
A gear 17 (planetary gear) that is engaged with and disengages with is rotatably attached. The gear 17 meshes with both gears 6a and 6b in the state shown in FIG. 1, and can be separated from the gear 6b when the lever 16 is swung in the direction indicated by the arrow X. At the free end of the lever 16,
A handle 18 is provided, and this handle 18 and the mounting table 1
A spring 19 for rotating the lever 16 in a direction in which the gear 6b and the gear 17 are engaged with each other is provided between and. The first to third links 7a, 7b, 9a, 9b, 12a,
12b constitutes the link mechanism of the present invention, gears 6a and 6b constitute the gear of the present invention, and gear 17 and lever 16 constitute the gear stop mechanism of the present invention.
The gear stop mechanism constitutes an intermediate portion.

Therefore, when the gear 17 meshes with both gears 6a and 6b as shown in FIG. 1, the gears 6a and 6b move in the direction of arrow Y due to the downward load applied to the mounting table 1. Even if the gear 17 tries to rotate, the gear 17 bites into it and cannot rotate, and the gear 17 is fixed in the illustrated state. Therefore, the first link 7 integrated with the gears 6a, 6b
a, 7b, second links 9a, 9b connected to the first links 7a, 7b, and third links 12a, 12b are also fixed, and the link mechanism including the first to third links serves as legs. The load of a person or the like placed on the mounting table 1 is supported. Next, when the handle 18 is lifted up against the spring 19, the gear 17 is separated from the gear 6b, and the gears 6a, 6
b can rotate freely. Therefore, when the mounting table 1 is held in the hand and moved up and down while the handle 18 is being lifted, the first to third links are freely expanded and contracted, and the gears 6a and 6b are
Rotates freely. In FIG. 3, the mounting table 1 is moved to the lowest position with the gear 17 being released as described above.
In this state, the state where the hand is released from the handle 18, that is, the state where the intermediate portion 3 is the shortest is shown. Therefore, when the mounting table 1 is lifted to the arbitrary height position as described above and the handle 18 is released, the gear 17 meshes with both the gears 6a and 6b, the movement is stopped, and the mounting is performed at the arbitrary height. The table part 1 can be supported. In this embodiment, the gear 6a,
Since 6b and the gears 15a, 15b are meshed together, the first to third links are always line-symmetric with respect to the vertical line passing through the pin 10, and their movements are stable. In contrast, base portion 1 mounting not meshing teeth wheel 15a, 15 b
There is a disadvantage that the link mechanism becomes linear when the is lifted to the highest position, and the intermediate portion 3 bends to the right or left and becomes unstable. Further in this embodiment, it is covered over Symbol intermediate section with a flexible bellows like, also an excellent support base in terms of appearance.

[0008]

Since the present invention is configured as described above, there is no sliding portion for adjusting the height of the legs constituting the support base such as a chair, and a robust gear and link mechanism are provided. It is possible to provide a highly durable support stand that can be configured only by itself and can be adjusted to any height.

[Brief description of drawings]

FIG. 1 is a front view of a support base according to an embodiment of the present invention.

FIG. 2 is a side view of a support base according to an embodiment of the present invention.

FIG. 3 is a front view showing a state in which the link mechanism is contracted.

[Explanation of symbols]

1 ... Mounting base part 2 ... Base part 3 ... Intermediate part 6a ... Gear (thick
Positive gear 6b ... Gears 7a, 7b ... First link 9a, 9b ... Second link 12a, 12b ... Third link 16 ... Lever
(Gear stop mechanism) 17 ... Gear ( planetary gear, gear stop mechanism) 18 ... Handle 19 ... Spring

Claims (1)

[Claims] 1. A base unit placed on a floor, a mount unit disposed on the base unit for placing an article, and the base unit and the mount unit connected to each other. In a support table having an intermediate portion, the intermediate portion is provided below the mounting table portion such that the rotation axes thereof are parallel to each other, meshes with each other, and opposes each other.
Of a pair of gears rotatable in the direction of the
The planetary gear that meshes with one gear as the sun gear
It is provided so that it can be engaged with and disengaged from the other gear of the pair of gears.
The planetary gears of the
A gear stop mechanism for stopping the rotation of the pair of gears at an arbitrary position by appropriately meshing with a car, and an upper end of the pair of gears connected to the fulcrum shaft on the base and a lower end of the gears. A support base, comprising: a link mechanism whose movement is stopped when the pair of gears is stopped by the stop mechanism.