JPH0736781B2 - 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, the height of a chair or the like can be freely adjusted by a support base such as a chair. Many of them have a sliding part whose height is variable.

[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-mentioned object, the first means adopted by the present invention has the gist of the first means, that is, a base part to be placed on the floor and an article to be placed. In the support base, which is provided on the base part for the purpose, and a middle part for connecting the base part and the mount part, the middle part is a lower part of the mount part. And a pair of gears that are engaged with each other and are rotatable in opposite directions, and one of the pair of gears.
The planetary gear that meshes with the gear as the sun gear is the pair of teeth.
It is provided so that it can be engaged with and disengaged from the other gear in the car
Roll the gear along the sun gear to match the other gear.
A gear stop mechanism for stopping the rotation of the pair of gears at an arbitrary position by meshing with each other, and the gear stop mechanism.
To disengage the planetary gear from the other gear.
A lock mechanism that blocks and locks appropriately, and the upper end is connected to the pair of gears and the lower end is connected to a fulcrum shaft on the base part, and the expansion / contraction operation is stopped when the pair of gears is stopped by the gear stop mechanism. it is a support base according to the point where by and a Brighter link mechanism. Further, the gist of the second means is that a base part to be placed on the floor, a mounting base part to be placed on the base part for placing an article, and the base base. In a support table including a table and an intermediate part for connecting the table part, the intermediate part is provided below the table part so that the rotation axes are parallel to each other, meshes with each other , and is opposed to 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 the vehicle and a gear stop mechanism for engaging the gear stop mechanism ,
A lock mechanism that prevents separation and locks appropriately, and an upper end is connected to the pair of gears and a lower end is connected to a fulcrum shaft on the base part, and an extension / contraction operation is performed when the pair of gears is stopped by the gear stop mechanism. And a plurality of sets of link mechanisms that are stopped.

[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, if the gear stop mechanism is actuated to stop the rotation of the pair of gears in a state where the mounting table is lifted to an appropriate height position, 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. And
In the above configuration, the robustness is improved by providing a plurality of sets of link mechanisms, and by providing the lock mechanism that appropriately locks the gear stop mechanism, the state of the link mechanism at a predetermined expansion / contraction height is further improved. Securely retained.

[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 sectional view of a support base according to one embodiment of the present invention, FIG. 2 is a sectional view of the same side, and FIG. 3 is a front view showing a state in which a link mechanism is contracted. In this embodiment, the supporting table according to the present invention is applied to a chair, and the table is equipped with a mounting table 1 for mounting a person or an article and casters 2a, and is mounted at an appropriate position. It is composed of a base part 2 which can be moved to a lower part, and an intermediate part 3 which connects the mounting part 1 and the base part 2 described above. The configuration of the intermediate section 3 will be described below. An upper frame 4 having a U-shape in a side view is fixed to the lower surface of the above-mentioned mounting base part 1 which is horizontally provided, and the upper frame 4 and the lower surface side of the mounting base part 1 are horizontally and rotatably arranged. Installed parallel shafts 5a, 5b
A pair of gears 6a and 6b are non-rotatably supported via key members 5c and 5d and mesh with each other. Therefore , the above-mentioned gears 6a, 6b are interlocked via the parallel shafts 5a, 5b.
It can rotate in the opposite direction. Two sets of left and right second links 9a, 9b, 9a, 9b are attached to the free ends of the two sets of left and right first links 7a, 7b, 7a, 7b integrally with the parallel shafts 5a, 5b through shafts 8a, 8b. Are swingably connected. The second links 9a, 9b, 9a, 9b are separately connected to each other in an X shape at the center by a shaft 10, and at the lower end thereof, two sets of left and right third links 12a, 12b, 12a are provided via shafts 11a, 11b. , 12b
And are connected separately. Furthermore, the above third link 12
The a, 12b, 12a and 12b are non-rotatably attached to the horizontal parallel shafts 14a and 14b of the base 2, and the parallel shafts 14a and 14b are rotatably supported on the base 2. . A gear 15 is attached to the parallel shafts 14a and 14b so as not to rotate with respect to the parallel shafts 14a and 14b through the key members 14c and 14d and to be slidable in the axial direction thereof.
a and 15b are provided. Then, the gear 15
a and 15b are held by a U-shaped lower frame 13 in a side view.

In this embodiment, the gears 15a and 15b are
However, such meshing is not always necessary, and the gears 15a and 15b may be omitted.
In the case of this embodiment, one of the parallel shafts 5a and 5b (5
A lever 16 is swingably supported on a), and a gear 17 meshing with the lever 16 is such that one gear 6a is engaged as a sun gear and the other gear 6b is disengageably engaged.
(Planetary gear) 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. A handle 18 is provided at the free end of the lever 16, and the lever 16 is connected to the gear 17 between the handle 18 and the upper frame 4.
A spring 19 is provided for rotating the gear 6b and the gear 6b in a direction in which they mesh with each other. Further, a lever 20 is swingably supported on the lower surface side of the mounting table portion 1 described above, and a free end portion 21a of a knock piece 21 that is swingably attached to the lever 20 is provided on the mounting table portion described above. It is fitted between the lower surface of 1 and the upper surface of the lever 16. This prevents the lever 16 from swinging and prevents the gear 17 from being unexpectedly disengaged from the gear 6b, which can greatly contribute to improving safety. In this case, the lever 20 is constantly elastically biased by the spring 22 in the direction in which the free end portion 21a of the knock piece 21 is fitted between the mounting table portion 1 and the lever 16 and resists this biasing force. By swinging the lever 20 in the direction indicated by the arrow Z, the free end portion 21a of the knock piece 21 is removed from between the mounting table portion 1 and the lever 16, and the gear 6b of the gear 17 is removed. It becomes possible to perform the leaving operation. The first to third links 7a, 7b, 7a,
7b, 9a, 9b, 9a, 9b, 12a, 12b, 12
a, lock 12b is a link mechanism of the present invention, gears 6a, 6b is the gear of the present invention, the lever 16, the gear stop mechanism of the gear 17 is the present invention, also the lever 20, Roh click piece 21 is the invention Each of the mechanisms is composed of the above-mentioned link mechanism, gears,
The intermediate portion 3 is composed of the gear stop mechanism and the lock mechanism.

Therefore, as shown in FIG. 1, when the gear 17 meshes with both gears 6a and 6b, the gears 6a and 6b rotate in the direction of arrow Y due to the downward load applied to the mounting table 1. Even if an attempt is made, the gear 17 is caught and cannot rotate, and is fixed in the illustrated state. Therefore, the first link 7 integrated with the gears 6a, 6b
a, 7b, 7a, 7b Further, this first link 7a, 7
Second links 9a, 9b, 9 connected to b, 7a, 7b
a, 9b, third links 12a, 12b, 12a, 12b
Is also fixed, and the link mechanism including the first to third links serves as legs to support the load of a person or the like placed on the mounting table 1. In this case, since the lock mechanism prevents the gear 17 from being disengaged from the gear 6b, the safety in use thereof is extremely high. Next, when the lever 20 and the handle 18 are sequentially lifted against the springs 22 and 19,
The gear 17 is separated from the gear 6b, and the gears 6a and 6b can freely rotate. Therefore, with the handle 18 still lifted (at this time, the operation of the lever 20 is such that the free end 2 of the knock piece 21
(1a is regulated by engaging with the lever 16) When the mounting table 1 is held in the hand and moved up and down,
~ The third link freely expands and contracts, and the gears 6a, 6b rotate freely. FIG. 3 shows a state in which the mounting table 1 is moved downward with the gear 17 released as described above, and the hand is released from the handle 18, that is, a state in which the intermediate portion 3 is shortened. At this time, as shown in FIG. 2, the lower frame 13 is shifted to either the left or right direction (to the right as shown by the broken line in the figure), and the gears 15a and 15b and the gear 6a,
By avoiding the engagement with 6b and the upper frame 4, it is possible to extremely efficiently downsize it. In this case, the shaft 10 is housed in the recess 4a (see FIG. 1) formed on the lower surface side of the upper frame 4.

Therefore, when the mounting table 1 is lifted to an arbitrary height position as described above and the handle 18 is released, the gear 17 meshes with both the gears 6a and 6b, and the movement thereof is stopped so that the arbitrary movement is stopped. The mounting table part 1 can be supported at a height. In this case, the free end portion 21a of the knock piece 21 is fitted between the mounting table portion 1 and the lever 16, and the gear stop mechanism is locked. Further, since the base portion 2 is provided with the casters 2a, its movement is extremely easy. In this embodiment, since the gears 6a and 6b and the gears 15a and 15b are meshed with each other, the first to third links are always line-symmetric with respect to the vertical line passing through the shaft 10 and their movements are stable. . In contrast, the link mechanism when lifting the tooth wheel 15a, 15 b to the highest position table unit 1 mounting the mesh <br/> not mix becomes linear, middle portion 3 is bent to the right or left There is a disadvantage that it becomes unstable. In yet embodiment of this <br/>, it is covered over Symbol intermediate section with a flexible bellows like, also an excellent support base in terms of appearance. In the upper Symbol support base, it is also possible to configure to change the number of sets of respective links constituting a link mechanism in accordance with the size of the support weight.

[0010]

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 sectional view of a support base according to an embodiment of the present invention.

FIG. 2 is a side sectional 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]

DESCRIPTION OF SYMBOLS 1 ... Mounting stand part 2 ... Base part 3 ... Intermediate part 6a ... Gear (sun
Gears 6b ... Gears 7a, 7b ... First link 9a, 9b ... Second
Links 12a, 12b ... Third link 16 ... Lever (tooth)
Vehicle stop mechanism 17 ... Gear (planetary gear, gear stop mechanism) 18 ... Handle 19, 22 ... Spring 20 ... Lever (lock mechanism) 21 ... Knock piece (lock mechanism) 21a ... Free end

Claims (2)

[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 the vehicle, and the gear stop.
From the other gear of the planetary gear that engages with the stop mechanism.
A lock mechanism that prevents separation and locks appropriately, and an upper end is connected to the pair of gears and a lower end is connected to a fulcrum shaft on the base part, and an extension / contraction operation is performed when the pair of gears is stopped by the gear stop mechanism. support base, characterized in that but formed by and a stopped ruri link mechanism. 2. A base unit placed on the floor, a mount unit arranged 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 the vehicle and a gear stop mechanism for engaging the gear stop mechanism ,
A lock mechanism that prevents separation and locks appropriately, and an upper end is connected to the pair of gears and a lower end is connected to a fulcrum shaft on the base part, and an extension / contraction operation is performed when the pair of gears is stopped by the gear stop mechanism. And a plurality of sets of link mechanisms that are stopped.