JP3997452B2 - Chair with seat lift - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chair device for raising and lowering a seat.
[0002]
[Prior art]
Conventional chairs for raising and lowering a seat have been lifted and lowered under a seat or fixed to a frame, such as a cylinder that extends and contracts by hydraulic pressure or air pressure, or a jack-type motor.
[0003]
[Problems to be solved by the invention]
However, the conventional chair for raising and lowering the seat has the disadvantages that the raising and lowering range of the seat becomes small depending on the size and mounting location of the lifting device, resulting in inconvenience in getting on and off, and the number of frames increases and the chair becomes heavy.
[0004]
An object of the present invention is to provide a chair with a seat lifting device that simplifies the structure, is lightweight and can be lowered to the vicinity of the floor surface, and is easy to get on and off for the purpose of improving usability.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a rotating body is rotatably attached to the front and rear ends of both side surfaces of the seat, and the left and right rotating bodies on either the front end side or the rear end side are attached to the countershaft. Connect with
The rotating body on the side surface is wound with a cord-shaped body.
[0006]
The cord-like body is wound on a pair of left and right rotating bodies on both sides of the seat, fixed at one end to the upper part of the frame, and then wound from the rotating body at the rear end of the seat to the rotating body at the front end. Tighten and fix to the bottom of the frame. The lifting means is provided with a worm gear mechanism on one of the side surfaces of the front end of the seat, and when this part is moved up and down, the front and rear ends of the seat mesh with the cord-like body and move by the same distance by the action of the balance chain. The end also raises and lowers the seat in parallel by the lifting drive force.
[0007]
With the above structure, the seat can be raised and lowered in a well-balanced manner simply by providing a lifting means at one end of the seat, and the seat is lowered to the vicinity of the floor surface because there is no frame or the like below the seat. be able to.
[0008]
Furthermore, this invention employs a worm gear mechanism as the lifting means. Since the worm gear mechanism has a locking action, there is no need to use a brake device with a stopper device or a geared motor for stopping the seat from moving up and down.
[0009]
In the present invention of claim 2 Symbol mounting, an elastic means for adjusting the length of the wick member to one end of the wick member disposed telescopic means it is possible to change the inclination angle of the seat by adjusting the.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment embodying a chair with a seat lifting apparatus according to the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a basic chair with a seat lifting apparatus of the present invention, and FIG. 2 is a cross-sectional view seen from the side. As shown in FIG. 1, a pair of left and right h-shaped frames 1 are connected by a rod-like connecting frame 2, a connecting frame 3, and a connecting frame 4.
[0011]
A pair of left and right rotating bodies (for example, sprockets) 5 and 6 are attached to the sprocket 5 on both side surfaces of the front end portion of the seat 9 and the sprocket 6 on both side surfaces of the rear end portion. 6 are connected to the opposite ends of the countershaft 7 at least one of the left and right sprockets 5 (the sprocket 5 is connected to the countershaft 7 as an example).
[0012]
One end of a pair of left and right cable-like bodies (as an example, a chain) 8 is attached to the connecting frame 2, and the lower side of the sprocket 5 is wound as shown in FIG. Each is attached to the connecting frame 4.
[0013]
The left and right chains 8 are stretched so that there is no slack and the lengths are equal. By connecting the sprocket 5 with the countershaft 7 as described above, the left and right sprockets 5 rotate at the same speed, and by making the movement of the left and right chains 8 the same, only the power to be raised and lowered is applied to one end of the seat 9. The seat 9 can be moved up and down while maintaining the front / rear / left / right balance.
[0014]
The guide roller 11 fixes the rod-shaped guide rail 10 to the connecting frame 2 and the connecting frame 3 in parallel with the moving direction of the seat 9 and is attached to the back side of the backrest 20 so as to be rotatable along the guide rail 10.
[0015]
The guide rail 10 and the guide roller 11 are orthogonal to each other when viewed from the left-right direction, and the middle portion of the guide roller 11 is constricted along the outer periphery of the rod-shaped guide roller 10. The seat 9 can be lifted and lowered more smoothly by preventing the tilting of the seat 9 and suppressing the swinging of the front, rear, left and right.
[0016]
FIG. 3 shows an example of the manual lifting means A. The lower part of the handle 12 is fixed to one end of the connecting shaft 13, the worm shaft 14 is fixed to the other end, and the worm shaft 14 is rotatably attached to the outer frame 17. A worm wheel 15 that meshes with the worm shaft 14 is pivotally attached to the outer frame 17 and fixes the gear 21 coaxially with the worm wheel 15 so as to rotate in conjunction with the worm wheel 15.
[0017]
The rack 16 is fixed to one of the side surfaces of the left and right frames 1 in parallel with the moving direction of the seat. The elevating means A engages the rack 16 and the gear 21 and rotates the gear 21 so that the seat 9 can be moved up and down along the rack 16.
[0018]
The position of the seat 9 is such that the worm shaft 14 is incorporated in the lifting means A, so that the worm shaft 15 can be applied even if a rotational force is applied to the worm wheel 15 such as when the seat 9 is in a heavy state. Since the worm wheel 15 does not rotate due to the locking action 14, the worm wheel 15 is kept constant without requiring a stopper device for stopping the seat 9 from moving up and down.
[0019]
FIG. 4 shows an example of the electric lifting means B. In this configuration, the geared motor 18 interlocked with the operation plate 19 is fixed to the outer frame 17, the output shaft of the geared motor 18 is fixed to one end of the connecting shaft 13, and the other end is fixed to the worm shaft 14. Is rotatably attached to the outer frame 17. A worm wheel 15 that meshes with the worm shaft 14 is pivotally attached to the outer frame 17 and fixes the gear 21 coaxially with the worm wheel 15 so as to rotate in conjunction with the worm wheel 15.
[0020]
The rack 16 is fixed to one of the side surfaces of the left and right frames 1 in parallel with the moving direction of the seat. The lifting means B meshes the rack 16 and the gear 21 and rotates the gear 21 so that the seat 9 can be moved up and down along the rack 16.
[0021]
The lifting means B is also configured to incorporate the worm shaft 14 in the same way as the lifting means A, so that even when a rotational force is applied to the worm wheel 15 such as when the seat 9 is sitting on the seat 9 and is heavy. Since the worm wheel 15 does not rotate due to the locking action of the worm shaft 14, it is not necessary to provide a stopper device or a geared motor with a brake for stopping the seat 9 from moving up and down, and the seat 9 is kept constant.
[0022]
The raising / lowering means A and the raising / lowering means B may be configured not to use the worm shaft 14 by attaching a stopper device for stopping the raising / lowering of the seat 9 or using a geared motor with a brake. For example, instead of the worm gear mechanism, it may be raised and lowered by the configuration of the winding drum and the wire, but in this case, a brake part is required.
[0023]
7 and 8 show an example of the expansion / contraction means C for adjusting the length of the chain 8.
The expansion / contraction means C is configured such that a rotating body (for example, a sprocket) 22 is rotatably attached to the left and right pair of chains 8 at a position where the chain 8 is fixed to the connection frame. A sprocket 22 is wound around the end of 8 and attached to a rotating body (for example, a sprocket) 23. The sprocket 23 fixes a bearing 25 that rotatably supports the shaft 24 in the vicinity of the connecting frame 3 of the frame 1 and is fixed so as to rotate along with the rotation of the shaft 24.
[0024]
The shaft 24 is rotatably supported by the left and right bearings 25 near one end and the other end, and the other end projects from the bearing 25. The adjustment knob 26 is attached to the protruding tip. By rotating the adjustment knob 26, the sprocket 23 rotates, and when the chain 8 is wound up, the inclination angle of the seat 9 changes.
[0025]
In addition to the expansion / contraction means C described above, an electrically wound type of the chain 8 and an adjustable type that is pulled by a lever such as a side brake of a car are conceivable.
The sprocket 23 requires an engaging portion for locking the rotation, but the description here is omitted.
[0026]
As shown in FIGS. 1, 3, and 4, the seat 9 is supported by the lifting means A or the lifting means B attached to the side of the chain 8 and the seat 9, so that there is a space between the seat 9 and the floor surface. It becomes. Therefore, the seat 9 can be lowered onto the floor surface, and it is possible to easily get on and off a person with a disability.
[0027]
FIG. 5 shows an example in which the mechanism of the present invention is used in a wheelchair. Thus, when the seat 9 is lowered to the vicinity of the floor surface, the passenger gets on or off the chair, and the seat 9 is moved to the vicinity of the bed surface of the bed to move between the chair and the burden on the caregiver. Can be reduced.
[0028]
FIG. 6 shows a state when the seat 9 is lowered, and the user can easily move from the floor surface to the seat 9. On the contrary, the seat 9 can be raised and moved to a higher position.
[0029]
【The invention's effect】
As described in detail above, since the invention according to claim 1 can maintain the balance of the seat 9 and raise and lower it from a low position to a high position only by providing an elevating means at one end of the seat, There is an effect of reducing the burden on the user or caregiver, such as by moving the seat up to the vicinity of the bed surface of the bed by the lifting means.
[0030]
Furthermore, the present invention, without providing a stopper device for stopping the lifting of the seat's seat, without the seat is lowered by the weight of its own weight and a user of the seat, it is possible to lift the saw seat when operating the lifting means Therefore, there is also an effect of being light and inexpensive.
[0031]
The invention of claim 2 Symbol placement, by changing the inclination angle of the seat's seat, and when to tune body shape of the user, the effect of increasing the comfort of the user, such as when you want to change the long-term use to position is there.
[Brief description of the drawings]
FIG. 1 is a front view showing a basic chair with a lifting device.
FIG. 2 is a cross-sectional view showing a mechanism of a cord-like body and a rotating body, and a mechanism of a guide roller and a guide rail.
FIG. 3 is a side view of a chair with a lifting device provided with a manual lifting device.
FIG. 4 is a side view of a chair with a lifting device provided with an electric lifting device.
FIG. 5 is a side view showing a chair with a lifting device as an example of a wheelchair.
FIG. 6 is a side view showing a state where the seat is raised and lowered.
FIG. 7 is a cross-sectional side view showing an expansion / contraction means.
FIG. 8 is a rear view showing the expansion / contraction means.
[Explanation of symbols]
1 Frame 5 Rotating body (Sprocket)
6 Rotating body (sprocket)
7 Countershaft 8 Cord-like body 9 Seat 14 Worm shaft A Lifting means B Lifting means C Telescopic means

Claims (2)

Vertically forming a pair of h-shaped frames, in the chair having a seat moves up and down along the 該Fu frame,
A rotating body is provided rotatably at the front and rear ends of both side surfaces of the seat,
Wherein for at least one of the front and rear of the rotating body is provided with a counter shaft that connects the left and right 該回 rolling bodies,
The rotation of the front and rear ends of both side surfaces of the seat, provided cord-like body wound around the pair,
Provided lifting means is a worm gear mechanism to place on one side of the front end of the seat,
The wick member may be fixed at one end to the upper part of the frame, by turning around the rotating body of the front end from the rotating body of the rear end of the seat is fixed by tension at the other end to the bottom of 該Fu frame A chair with a seat lifting device. 2. A chair with a seat lifting apparatus according to claim 1, wherein an extension means for adjusting the length is provided at one end of the cord-like body, and the inclination angle of the seat is changed by the extension / contraction of the length of the cord- like body. .

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