JP2002085456A - Lift for wheelchair to get over level difference by itself - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for a user to lift up/down to get over a level difference by himself/herself while sitting on the wheelchair. SOLUTION: Handrail supporting pipes 3 are erected on four corners of a lifting base plate 1 for holding a wheelchair K and horizontal handrails 2 are fixed between the tops of the pipes 3 in forward/backward directions. A hydraulic cylinder 6 having a piston shaft 4 on its lower-end head part is fixedly provided inside each pipe 3. On the plate 1, a pair of rollers 7a, 7b and 8a, 8b for shallowly sandwiching driven wheels W of the wheelchair are pivotably supported on front and rear parts of both sides of the plate with an interval, and wheel holding grooves 23 to which wheel-receiving belts 9 are loosely attached are opened and exposed on the rollers 7a, 7b and 8a, 8b. Moreover, a hydraulic pump 13 connected to hydraulic pressure pipes 12 via the cylinder 6 is fixed on the plate 1, and gears 15 and 11 are fixed on the operating shaft 14 of the pump 13 and the pivots 10 of the rollers 7a and 8a, and both gears 15 and 11 are communicated via a rotation transmission means 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift for moving over a height difference such as an entrance frame on a wheelchair by itself.

[0002]

2. Description of the Related Art There have hitherto been provided various motorized elevators (lifts) for overcoming height differences such as entrance frames. The device is automated and has the advantage that the user can easily get over the steps without requiring much effort, but on the other hand, the electric mechanism incorporates a heavy object such as a motor, making it difficult to move and install. However, there are drawbacks such as the lack of such components and the increase in the cost of components such as used motors and control components.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and when traveling over a height difference in a wheelchair, the occupant lifts and lowers the lift by himself while riding in the wheelchair. It is an object of the present invention to provide a device capable of overcoming a height difference.

[0004]

In order to solve the above-mentioned problem, the present invention provides a handrail support tube 3 which is suspended from four corners of a horizontal lift base plate 1 having a size on which a wheelchair K can be placed. A horizontal handrail 2 having substantially the same height as the handrail L of the wheelchair K is installed between upper portions of the handrail support pipes 3 in the front-rear direction.

A hydraulic cylinder 6 having a piston shaft 5 having a support leg 4 attached to a lower end head portion is fixedly mounted in each of the handrail support tubes 3. A pair of rollers 7a, 7b, 8a, 8b sandwiching the drive wheel W of the wheelchair K shallowly from the front and rear are pivotally supported at intervals, and the wheels 7a, 7b, 8a, 8b are provided with a wheel receiving belt 9
The dew ring groove 23 to which is loosely attached is opened and exposed.

Further, a hydraulic pump 13 connected to the lifting base plate 1 via a hydraulic cylinder 6 and a hydraulic pipe 12 is provided.
Gears 15 and 11 are fixed to the operating shaft 14 of the hydraulic pump 13 and the pivot 10 of the rollers 7a and 8a, and the two gears 15 and 11 are connected to the operating shaft 14 via the rotation transmitting means 16. And configure.

When the driver manually rotates the drive wheel W forward while the drive wheel W of the wheelchair K on the lift base plate 1 falls between the rollers 7a, 7b, 8a and 8b, the hydraulic pump 13 , The piston shaft 5 with the supporting leg 4 attached thereto is extended downward, and the lift base plate 1 can be raised by the reaction of the piston shaft 5.

Further, in the above configuration, the operating shaft 14
The manual lifting handle 17 for rotating the clutch mechanism 1
9 is provided via the rotation transmission means 18 of the handle provided with the handle 9.

Further, in the above configuration, the gear 11
A stop claw 20 for stopping rotation by meshing with the gear 15 is provided so as to be able to protrude and retract from the gear 15, and an operation rod 21 for operating the stop claw 20 to protrude and retract is provided on the elevating base plate 1. .

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a lift for a wheelchair according to the present invention.

In the present invention, as shown in FIG. 1, a handrail support tube 3 made of a square pipe is vertically provided at four corners of a horizontal lift base plate 1 having a size on which a wheelchair K can be mounted, and the front and rear directions are provided. Handrail support tube 3
A horizontal handrail 2 having substantially the same height as the handrail L of the wheelchair K is installed in parallel between the upper portions of the handrail. As shown in FIGS. 2 and 3, a hydraulic cylinder 6 having a piston shaft 5 having the same length as the step H in a downward direction with a supporting leg 4 attached to a lower end head portion in each of the handrail support tubes 3. To secure. A leg stabilizing plate 25 is installed on the support leg 4 so as to keep the interval between the support legs 4 accurate.

A pair of rollers 7a, 7b, 8a, 8b sandwiching the drive wheel W of the wheelchair K shallowly from the front and rear are pivotally supported on the lift base plate 1 at both front and rear sides thereof. 7b, 8a and 8b have wheel receiving belt 9
Is loosely opened to expose the falling ring groove 23.

Further, as shown in FIG. 4, a small high-performance hydraulic pump having a size that can be accommodated within the thickness of the lift base plate 1 connected to the lift cylinder 1 via a hydraulic pipe 12 as shown in FIG. 13 is fixed. If the capacity of the hydraulic pump 13 is, for example, 200 kg, the piston shaft 5 can be pushed downward by uniformly pressing the hydraulic cylinders 6 from the four hydraulic pipes 12 at 50 kg.

As shown in FIG. 2, the operating shaft 14 of the hydraulic pump 13 and the pair of rollers 7a, 7b,
The gears 15 and 11 are fixed to the pivot 10 of the rollers 7a and 8a located closer to the center of the gears 8a and 8b, and the two gears 15 and 11
Is connected to the operating shaft 14 via the rotation transmitting means 16. The rotation transmitting means 16 is set to transmit decelerated rotation in order to reduce the burden on the occupant as much as possible, so that a large rotational force can be obtained from a small rotational force of the drive wheel W.

The rotation transmitting means 16 is shown in FIG. 6 in which the two gears 15 and 11 are connected by a chain 22. In addition, a structure having a combination of gears and shafts is used. You can also.

When using the present invention, FIG.
As shown in FIG.
When the vehicle falls manually and the passenger manually rotates the drive wheel W forward, the rollers 7a and 8a rotate, and the rotation transmitting means 1
6, the pressure of the hydraulic pump 13 generated by the rotational force is transmitted to the piston shaft 5 through the hydraulic pipe 12, and the support leg 4 is protruded downward. The lifting base plate 1 rises.

Also, as shown in FIG.
The manual lifting handle 17 for rotating the clutch mechanism 1
9 is provided via a rotation transmission means 18 of a handle provided with 9. In FIG. 6, when the manual lifting handle 17 for rotating the operating shaft 14 is pressed and turned, the clutch mechanism 19 is rotated.
Although the rotation transmission means 18 has a mechanism in which the bevel gears mesh with each other to rotate the shaft to rotate the operating shaft 14, other various modes in which a gear, a belt, a shaft, and the like are combined are also possible.

Further, as shown in FIG.
The rotation stop claw 20 for stopping rotation by meshing with the gear 1
1 is provided so as to be able to protrude and retract, and an operating rod 21 for operating the stop claw 20 to protrude and retract is pivotally supported on a fulcrum 26 on the elevating base plate 1.
The stop claw 20 can be protruded and retracted with respect to the gear 11 by operating the operating rod 21 back and forth.

FIG. 2 and FIG. 5 show the manner in which the slope 24 for eliminating the step H of the thickness of the lift base plate 1 is arranged. This slope 24 is provided at the end of the lift base plate 1. It can also be mounted via a hinge.

When the wheels are immersed in a position higher than the bottom surface of the lift base plate 1, and when the wheels are moved, a retractable caster (not shown) that can protrude the wheels below the bottom surface is mounted. It is also possible to easily move alone.

[0021]

According to the present invention, the driving wheel W of the wheelchair K is driven by the rollers 7a, 7b, 8
When the rider manually rotates the drive wheel W by falling between the wheels a and 8b, the force of the drive wheel W trying to compete rotates the roller 7a via the wheel receiving belt 9, and the rotation of the roller 7a As a result, the operating shaft 14 of the hydraulic pump 13 is rotated via the rotation transmitting means 16, and the pressure of the hydraulic pump 13 generated by the rotational force is transmitted to the piston shaft 5 via the hydraulic pipe 12, and Is projected downward (FIG. 5 shows a state in which the elevating base plate 1 is lowered).
As a result of this reaction, the lift base plate 1 rises by the step H (FIG. 2 shows a state where the lift base plate 1 is raised).

In addition, when the vehicle is once moved to a higher position and then returned to a lower position, the driver must ride in the opposite direction.
The operating shaft 14 rotates in the reverse direction, and the elevating base plate 1 descends. When the wheelchair moves on the elevating base plate 1, the front small wheel of the wheelchair passes over the wheel receiving belt 9, so that the wheelchair is prevented from falling into the fallen wheel groove 23 and tipping over. You.

Further, in the embodiment provided with the manual lifting handle 17 for rotating the operating shaft 14, the manual lifting handle 17 is moved from the high position to the low position by moving the lifting base plate 1 once moved to a higher position. You can go back. Furthermore, in a mode in which a stop claw 20 that meshes with the gear 11 and stops rotation is provided on the elevating base plate 1, the operating rod 21
The stop state can be fixed with the switch and it is safe.

As described above, the present invention has an extremely simple structure and can be provided at a very low cost as compared with a conventional large-scale lift device such as an electric type. In addition, since no heavy object such as a motor is incorporated, the weight has been reduced to such a degree that it can be lifted by an adult alone, and the installation location can be easily moved. Also, since it is not an electric type, there is an advantage that it can be used safely even in the event of a power failure. In addition, the fact that a passenger can overcome a step by himself increases the possibility that a disabled person can live independently without relying on another person without the need for the lift manager to be resident.

[Brief description of the drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a side view showing a state where the elevating base plate of the present invention is at a high position.

FIG. 3 is a front view of the embodiment of FIG. 2;

FIG. 4 is a plan view of the embodiment of FIG. 2;

FIG. 5 is a side view showing a state where the elevating base plate of the embodiment of FIG. 2 is at a low position.

FIG. 6 is a side view showing a main part of a rotation transmission unit from a roller.

FIG. 7 is a side view showing a main part of a mode having a stop claw.

FIGS. 8A and 8B are longitudinal sectional side views showing main parts in a form having a manual lifting handle showing a state in which the clutch is released and a state in which the clutch is engaged by pushing the handle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elevating base plate 2 Horizontal handrail 3 Handrail support tube 4 Support leg 5 Piston shaft 6 Hydraulic cylinder 7a Roller 7b Roller 8a Roller 8b Roller 9 Wheel receiving belt 10 Roller shaft 11 Gear 12 Hydraulic tube 13 Hydraulic pump 14 Working shaft 15 Gear 16 Roller Transmission means 17 manual lifting handle 18 handle rotation transmission means 19 clutch mechanism 20 stop claw 21 operating rod 22 chain 23 fallout groove 24 slope 25 leg stabilizer K wheelchair W wheelchair drive wheel L wheelchair handrail H step

Claims (3)

[Claims] 1. A handrail support tube (3) is vertically suspended at four corners of a horizontal lift base plate (1) large enough to mount a wheelchair (K), and the handrail support tube (3) in the front-rear direction is provided. Wheelchair between upper part (K)
A hydraulic handrail having a horizontal handrail (2) having substantially the same height as that of the handrail (L), and having a piston shaft (5) in each of the handrail support tubes (3) having a support leg (4) attached to a lower end head portion. A cylinder (6) is fixedly mounted, and a pair of rollers (7a) sandwiching a drive wheel (W) of a wheelchair (K) shallowly from front and rear on both sides of a front and a rear of the lift base plate (1), ( 7b), (8
a) and (8b) are pivotally supported at intervals, and the rollers (7a), (7b), (8a), and (8b) are exposed to open a drop ring groove (23) with a wheel receiving belt (9) loosely attached thereto. Further, the hydraulic cylinder (6) is mounted on the lift base plate (1).
And a hydraulic pump (1) connected through a hydraulic pipe (12).
3) is fixed, and the operating shaft (1) of the hydraulic pump (13) is fixed.
4) and the pivots (10) of the rollers (7a), (8a)
Gears (15) and (11) are fixed to the
5) and (11) are connected to the operating shaft (14) via a rotation transmitting means (16), and the drive wheel (W) of the wheelchair (K) on the lift base plate (1) is driven by a roller (W). 7a),
The passenger manually rotates the drive wheel (W) forward with the wheel dropped between (7b), (8a), and (8b) to operate the hydraulic pump (13) to attach the support leg (4). A lift for riding a wheelchair on a wheelchair, wherein a piston shaft (5) is extended downward, and a lift plate (1) can be raised by a reaction of the piston shaft (5). 2. A manual lifting handle (17) for rotating and lifting an operating shaft (14) is provided via a rotation transmission means (18) of a handle provided with a clutch mechanism (19). The lift for climbing over a wheelchair step according to claim 1. 3. An operating rod (2) that is provided with a stop claw (20) that meshes with the gear (11) to stop rotation so that the stop claw can protrude and retract from the gear (15).
2. The lift according to claim 1, wherein 1) is provided on a lift base plate.