JP2001333937A - Elevating device for wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevating device that can easily be installed on the wheelchair which has no height adjusting function for its seat. SOLUTION: The elevating device for wheelchair 1 consists of the four elevation guiding axes 11 that stand upright on the stand 10; and the elevation body 12, which can freely move up and down the guiding axes 11 that penetrate the elevation body 12, and has pipe cramps 15. This elevation body 12 has an electric motor 16 integrally, and sprocket nuts 17 that are helically installed at the elevation guide 11. Elevation is possible when the driving sprocket 18 of the electric motor 16, and an endless chain 20 that is wound around each of the sprocket nuts 17 are turned to make each of the sprocket nuts 17 drive synchronously. The pipe cramp 15 is used when being installed onto the wheel chair 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device for a wheelchair, which is mounted on an existing wheelchair having no height adjusting mechanism so that the wheelchair can be raised and lowered.

[0002]

2. Description of the Related Art Conventionally, wheelchairs have been used for moving disabled persons and elderly persons who cannot walk independently. As shown in FIG. 1, this wheelchair is provided with front wheels 50, 50 having a relatively small diameter at a front portion, and large wheels 51, 51 having a relatively large diameter at a rear portion. A disabled person or an elderly person, while sitting on the chair seat 53, runs by pushing the push rims 52, 52 fixed to the outside of the large wheels 51, 51 by hand, It is designed to run while pushing the rear handle.

[0003]

In recent years, with the advent of an aging society, the burden on caregivers has become a major problem.
For example, when a caregiver moves an elderly or disabled person from a bed to a wheelchair, and vice versa, the caregiver should hold the elderly or disabled person. While moving in a wheelchair, the height of the bed (about 70cm)
And the height of the seat of the wheelchair (approximately 45 cm) are different, which places a heavy burden on the caregiver's waist and the like, and often causes problems such as the caregiver being hurt. To cope with such a problem, Japanese Patent Application Laid-Open No. 8-107911 discloses
Wheelchairs have been proposed in which a hydraulic jack is installed in the chair part in advance and the height of the seat can be adjusted by oiling operation, but in reality, not only hospitals and facilities for the elderly but also home care is provided. Most wheelchairs used by the elderly and the disabled have fixed seats, and given the current situation, it is economically difficult to order and manufacture a new one.

[0004] Therefore, a main object of the present invention is to provide a wheelchair lifting / lowering device which can be easily attached to an existing wheelchair which does not have a seat height adjusting function.

[0005]

According to a first aspect of the present invention, there is provided a wheelchair lift apparatus which can be mounted directly on a pipe frame of a wheelchair or via a mounting support member fixed to the pipe frame. The wheelchair elevating device includes a plurality of elevating guide shafts, which are supported upright on a floor support table and have a thread groove formed on an outer surface thereof, and an elevating drive source. And a lifting body having a clamp for the pipe frame of the wheelchair or the mounting support member.

According to a second aspect of the present invention, there is provided a wheelchair lifting / lowering device which can be mounted directly on a pipe frame of a wheelchair or via a mounting support member fixed to the pipeframe. The elevating device is supported upright on the floor support table, and has a plurality of elevating guide shafts having screw grooves formed on the outer surface, and these elevating guide shafts are vertically penetrated and can be moved up and down along the elevating guide shafts. And an elevating body having a clamp for the pipe frame or the mounting support member of the wheelchair,
The elevating body integrally includes an electric motor,
A sprocket nut screwed to each of the lifting guide shafts is provided, and an endless chain around the driving sprocket of the electric motor and each of the sprocket nuts is wound. It is characterized by having become.

[0007] In these cases, it is also possible to eliminate the floor contact table, fix and hold each of the elevating guide shafts by a connecting member, and make the lower surface of the elevating guide shaft a floor contact surface.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a state in which a wheelchair lifting / lowering device 1 according to the present invention is mounted on a wheelchair 2, and FIG. 2 is a view taken along the line II-II in FIG.

As shown in FIGS. 1 and 2, the lifting device 1 for a wheelchair utilizes a pair of left and right side frames 55, 55, which are laid in the front-rear direction at the lower side portions of the wheelchair 2. It is a retrofit type elevating device that can be attached.
Two mounting and supporting pipe adapters 3, 3 (supporting members for mounting) are fixed at front and rear positions across the side frames 55, 55, and are mounted on the pipe adapters 3, 3. In addition, although it is possible to directly attach to the side frames 55, 55, since the height positions of the side frames 55, 55 are different depending on the wheelchair 2, it is better to provide an adjusting mechanism on the device side. It is preferable that a plurality of types of pipe adapters 3 and 3 are prepared in advance and adapted to various wheelchairs because the structure of the apparatus can be simplified.

The pipe adapters 3, 3 can be attached to the side frames 55, 55 by any structure. In the illustrated case, the pipe adapter 3 is provided with a half-structured upper clamp 3a. Are fixed in advance by welding or the like, and the lower clamp 3b is joined with the side frame 55 sandwiched therebetween.
a and the lower clamp 3b are fastened and fixed by bolts and nuts.

As shown in FIGS. 3 to 5, the wheelchair lifting / lowering device 1 is supported upright on a floor support 10 and has a plurality of screw grooves formed on the outer surface, four in the illustrated example. , And these lifting guide shafts 1
Are vertically penetrated, and an elevating body 12, which is provided with an elevating drive source and is capable of ascending and descending along the elevating guide shafts 11, 11.

In the following, the details will be described in detail.
0 are formed with insertion holes 10a, 10a... For inserting the lifting guide shafts at the four corners, respectively, and are integrally provided with plastic or rubber contact floor legs 13, 13. Is a steel plate material having an opening on the inner side for weight reduction. The lower end of the elevating guide shaft 11 is inserted into the insertion hole 10a, and is fastened with the nuts 14, 14 with the floor floor 10 interposed therebetween. The lifting guide shaft 11
Are respectively supported.

On the other hand, the elevating body 12 is a box-shaped device through which the four elevating guide shafts 11, 11 are vertically penetrated. Pipe clamps 15 and 15 are provided for fixing the motor shaft, and an electric motor 16 having a driving shaft facing the inside of the box is provided substantially in the center of the upper surface.
Inside the elevating body 12, sprocket nuts 17 screwed to the elevating guide shaft 11 and having a sprocket integrally fixed on the outer surface are provided, respectively. As shown in FIG. An endless chain 20 is wound around a driving sprocket 18 fixed to the driving shaft and the sprocket nuts 17, 17,... And a tension sprocket 19 provided for adjusting the tension. , All the sprocket nuts 17, 17... Are rotated and driven in synchronization with each other, so that the elevating body 12 can move up and down along the elevating guide shafts 11, 11. In this case, limit switches are provided on the upper and lower portions of the elevating guide shaft 11 (not shown), and when the elevating body 12 moves up and down to a predetermined position, power is automatically supplied to the electric motor 16. You may make it stop.

The above-described wheelchair elevating device 1 is fixed to two pipe adapters 3, 3 laid between the side frames 55, by pipe clamps 15, and controls the electric motor 16. Board (not shown)
Is fixed to, for example, the back of the wheelchair 2 by a clamp or the like.

Wheelchair 2 equipped with wheelchair lifting device 1
In order to raise the wheelchair 2, as shown in FIG. 6A, the driving sprocket 18 of the electric motor 16 is driven to rotate in a direction to lower the lifting guide shafts 11, 11,. When the floor support 10 comes into contact with the floor 21, the wheelchair 2 starts to move up together with the elevating body 12, as shown in FIG. 6B, and raises the wheelchair 2 to a predetermined height position. To return wheelchair 2 to its original height,
The driving sprocket 18 of the electric motor 16 is driven to rotate in a direction to lower the elevating body 12 from the state shown in FIG. When the wheelchair 2 descends and the large wheel 51 touches the floor 21, the ascending and descending guide shafts 11, 11,...

By the way, in the above-mentioned example, the lifting guide shafts 11, 11... Are supported upright by using the plate-like landing table 10, but the lifting table shaft 10 is eliminated and the lifting guide shaft 1 is removed.
.. May be directly in contact with the floor. In this case, each of the elevating guide shafts 11, 11,... Is supported upright by a connecting member that maintains the relative positional relationship.

[0017]

As described above in detail, according to the present invention, if this elevating device is mounted on an existing wheelchair having no seat height adjusting function, the wheelchair can be easily raised and lowered, and the elderly or the body The burden on the caregiver as well as the disability itself will be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a state in which a wheelchair lifting / lowering device 1 according to the present invention is attached to a wheelchair 2.

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is a side view of the wheelchair elevating device 1;

FIG. 4 is a front view thereof.

FIG. 5 is a plan view thereof.

FIG. 6 is a diagram showing a seat height adjustment procedure of the wheelchair 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lifting device for wheelchairs, 2 ... Wheelchair, 3 ... Pipe adapter (supporting member for attachment), 10 ... Floor contact stand, 11 ... Lifting guide shaft, 12 ... Lifting body, 13 ... Floor contact leg, 15 ... Clamp, 16 ... Electric motor, 17 ... Sprocket nut, 1
8: driving sprocket, 19: tension sprocket, 20: chain, 55: side frame

Claims (3)

[Claims] 1. A wheelchair elevating device which can be mounted directly on a pipe frame of a wheelchair or via a mounting support member fixed to the pipe frame, wherein the wheelchair elevating device stands on a floor mat. A plurality of elevating guide shafts each having a screw groove formed on an outer surface thereof, and an elevating drive source, the elevating guide shaft being capable of moving up and down along the elevating guide shafts, and a pipe frame or a mounting support member for the wheelchair. And a lifting / lowering body having a clamp for the wheelchair. 2. A wheelchair elevating device which can be mounted directly on a pipe frame of a wheelchair or via a mounting support member fixed to the pipe frame, wherein the wheelchair elevating device stands on a floor bed. While being supported, a plurality of elevating guide shafts having screw grooves formed on the outer surface thereof, these elevating guide shafts are vertically penetrated so that they can be moved up and down along the elevating guide shafts, and the pipe frame of the wheelchair or An elevating body having a clamp for the mounting support member, wherein the elevating body is integrally provided with an electric motor,
A sprocket nut screwed to each of the lifting guide shafts is provided, and an endless chain around the driving sprocket of the electric motor and each of the sprocket nuts is wound. A lifting device for a wheelchair, characterized in that: 3. The wheelchair for a wheelchair according to any one of claims 1 and 2, wherein the landing platform is eliminated, and each of the lifting guide shafts is fixed and held by a connecting member, and a lower surface of the lifting guide shaft is a floor contact surface. lift device.