JP2001089085A - Elevating/lowering device for wheel chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevating/lowering device for a wheel chair in which elimination of the step from a low floor level to a floor plate caused by folding X-shaped links, and treatment of making use of a slope or digging a hole and burying the elevating/lowering device therein to the depth corresponding to the folding height of the X-shaped links in advance are unnecessary. SOLUTION: This elevating/lowering device B for a wheel chair is provided with cylinders 38 and 39 for elevating/lowering operation in which a pair of the X-shaped links 30 and 34 are arranged between both sides of the floor plate 20 of U-shaped section with both sides erected and a base 10 to elevate/ lower the floor plate 20 via the X-shaped links 30 and 34, the elevation height of the floor plate 20 is set to the height of the X-shaped links 30 and 34, the cylinders 38 and 39 for elevating/lowering operation are arranged so as to be stored within the height, and the floor plate 20 is located at the lower position close onto the base 10 with the X-shaped links 30 and 34 in a folded condition.

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.

[0002]

2. Description of the Related Art Conventionally, as a lifting device for a wheelchair of this kind,
There is a wheelchair elevating device A as shown in FIG. In this wheelchair elevating device A, an elevating driving device 5 including an X-shaped link 3 and an elevating driving device (hydraulic cylinder) 4 is arranged between a base 1 and a floor plate 2. Such a wheelchair elevating device A
Folds the X-link 3 to lower the floorboard 2 and
The mold link 3 is opened so that the floor plate 2 is at a high position, and a wheelchair mounted on the floor plate 2 is moved between the low floor surface 6 and the high floor surface 7 to eliminate a step.

[0003]

In such a wheelchair elevating device A, when the floor plate 2 is set at a low position, the floor plate 2 is only as high as the height at which the X-type link 3 of the lifting drive device 5 is folded. Since the wheelchair becomes high, it is necessary to eliminate the step from the low floor surface 6 to the floorboard 2 when placing the wheelchair on the floorboard 2. Therefore, a slope is used from the low floor surface 6 to the floor plate 2, or a wheelchair elevating device A is dug from the low floor surface 6 and buried in the wheelchair elevating device A by the height of the folded X-link 3 as shown in FIG. It was necessary to take measures such as putting it on the floor.

By the way, the method of using the slope requires a space for providing the slope on the low floor surface 6 before the wheelchair elevating device A is installed, and a disabled person using the wheelchair can use the slope in the wheelchair. There is a drawback that you have to climb.

Further, the embedding method as shown in FIG. 6 has a drawback that the embedding hole must be prepared before the wheelchair elevating device A is installed, and the installation becomes large-scale.

SUMMARY OF THE INVENTION An object of the present invention is to provide a wheelchair lifting / lowering device which solves these problems.

[0007]

In order to achieve the above object, a wheelchair elevating device according to the present invention comprises a base made of a flat plate, and a U-shaped cross section which is disposed on the upper side of the base and has both sides raised. , A pair of base plates and an X-shaped link arranged between both sides of the base plate to guide the floor plate to the base so as to be able to move up and down, and the floor plate is driven by the X-shaped link via the X-shaped link. A lifting device for a wheelchair provided with a lifting drive cylinder, wherein the rising height of the floor plate is set to the height of the folded X-type link, and the lifting drive cylinder is accommodated within the height. The X-link is arranged in such a manner that the floor plate is located at a low position close to the base when the X-link is folded.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wheelchair lifting / lowering device B according to the present invention will now be described.
The embodiment will be described below with reference to FIGS.

3 and 4, reference numeral 10 denotes a base made of a thin flat plate. On one side of base 10, bracket 1
1, 12 at predetermined intervals (this interval is set so that a lifting drive cylinder 38 described later can be arranged).
Is open and placed. Brackets 13 and 14 are also arranged on the other side of the base 10 with a predetermined interval (this interval is set so that a lifting drive cylinder 39 described later can be disposed).

Reference numeral 20 denotes a floor plate, which is disposed above the base 10 and has raised portions 21 and 22 on both sides, and has a U-shaped cross section as shown in FIGS.

Reference numeral 30 denotes an X-shaped link disposed on the right side, which is provided with links 31 and 32 as shown in FIG.
The central portions of the links 31 and 32 are pivoted 33 to form an X shape. One end of the link 31 is pivotally supported at a front portion of the rising portion 21, and the other end is movably pivotally supported by an elongated hole 11 a provided at a rear portion of the bracket 11.
One end of the link 32 is connected to the front of the bracket 12 by a pivot 32a.
At the other end, a pivot 32b is provided at the rear of the rising portion 21 so as to be movable into the elongated hole 21a.

Reference numeral 34 denotes an X-type link disposed on the left side, which includes links 35 and 36, and has a central portion of the links 35 and 36 pivotally supported 37 to form an X-shape. Link 3
One end of 5 has a pivot 35a at the front of the rising portion 22,
The other end is movably pivoted to a long hole 13a provided at the rear of the bracket 13. One end of the link 36 is pivotally supported at the front of the bracket 14, and the other end is pivotally supported at the rear of the rising portion 22 so as to be movable into the elongated hole 22 a.

Numeral 38 denotes a lifting drive cylinder, which is interposed between the link 31 and the link 32. When the lifting drive cylinder 38 is extended, the X-shaped link 30 is opened and the lifting drive cylinder 38 is reduced. At times, the X-type link 30 is folded and arranged so as to fit within the height of the X-type link 30 at the time of folding.

Reference numeral 39 denotes a lifting drive cylinder, which is interposed between the link 35 and the link 36. When the lifting drive cylinder 39 is extended, the X-type link 34 is opened and the lift drive cylinder 39 is reduced. Sometimes, the X-type link 34 is folded and arranged so as to fit within the height of the X-type link 34 when folded.

Numeral 40 denotes a regulating means, which is interposed between the link 31 and the link 32 at a position which is symmetrical with respect to the vertical drive cylinder 34 and the pivot 33 as shown in FIG. The restricting means 40 includes a rod 40a and a parallel bar 40b. The rod 40a penetrates into the parallel bar 40b when the X-type link 30 is folded, and penetrates when the X-type link 30 is opened. . The rod 40a penetrated into the parallel bar 40b has a threaded portion, and a nut is screwed into the threaded portion to restrict the rod 40a from penetrating from the parallel bar 40b.

That is, by adjusting the position at which the nut is screwed into the threaded portion of the rod 40a, the effective stroke of the restricting means 40 is determined, and the extension stroke of the vertical drive cylinder 38 is restricted. By restricting the degree of opening of the floor 30, the rising height of the floor plate 20 can be regulated. This regulating means 40
Like the lifting drive cylinder 38, the X-link 30 is arranged so as to fit within the folded height.

Reference numeral 41 denotes a regulating means interposed between the link 35 and the link 36 at a position symmetrical with respect to the vertical drive cylinder 39 and the pivot point 37. The restricting means 41 is also composed of a rod 41a and a parallel rod 41b in the same manner as the restricting means 40, and by regulating the amount of protrusion of the rod 41a, restricts the extension stroke of the elevation drive cylinder 39 and raises the floor plate 20. The height can be regulated. The restricting means 41 is arranged so as to fit within the folding height of the X-type link 34, similarly to the lifting drive cylinder 39.

The regulating means 40 and the regulating means 41
The protrusion amounts of the rod 40a and the rod 41a are adjusted to be the same.

Reference numeral 42 denotes a stopper plate. The base end of the stopper plate is pivotally supported by the front end of the floor plate 20, and a hydraulic cylinder 43 is disposed between the front end of the stopper plate 42 and the front end of the rising portion 21. . Then, by reducing the hydraulic cylinder 43, the wheelchair placed on the floor plate 20 functions as a stopper for preventing the wheelchair from protruding from the front. Further, the stopper plate 42 holds the hydraulic cylinder 4 in a state in which the X-type link 30 is folded (the state in which the floor plate 20 is positioned at a low position).
By extending 3, it is made to serve as a gentle slope from the low floor surface 6 to the floor plate 20.

Reference numerals 44 and 45 denote L-shaped covers whose sizes are set so as to cover the folded X-shaped links 30 and 34, respectively, and which are attached to the floor plate 20. 46 is L
An operation box disposed on the letter-shaped cover 44. By operating a switch disposed here, the elevation drive cylinders 38 and 398 and the hydraulic cylinder 43 can be driven.

The lifting drive cylinders 38 and 39 and the hydraulic cylinder 43 are driven by a hydraulic circuit shown in FIG. That is, the discharge oil from the hydraulic pump 50 driven by the electric motor is connected to the tank 53 after the electromagnetic hydraulic switching valve 51 and the electromagnetic hydraulic switching valve 52 are connected in series. The electromagnetic hydraulic switching valve 51 is a switching valve for controlling the driving of the hydraulic cylinder 43, and the electromagnetic hydraulic switching valve 52 is a switching valve for controlling the driving of the lifting and lowering driving cylinders 38, 39.

A counterbalance valve 55 and a check valve 56 are arranged as shown in FIG. 5 in a reduction-side oil passage of the hydraulic cylinder 43 between the hydraulic cylinder 43 and the electromagnetic hydraulic switching valve 51. A counterbalance valve 57 and a check valve 58 are arranged as shown in FIG. 5 in the extension-side oil passage of the lifting / lowering driving cylinders 38, 39 between the lifting / lowering driving cylinders 38, 39 and the electromagnetic hydraulic switching valve 52.

Reference numeral 59 designates a switching valve for switching with the pilot pressure, which is inserted into the reduction-side oil passage of the lifting / lowering drive cylinders 38 and 39, and sets the reduction-side holding pressure of the hydraulic cylinder 43 to the pilot pressure to change the reduction-side hydraulic pressure. The road is switched to a communication state or a cutoff state. That is, the hydraulic cylinder 43
Only when a wheelchair on which the stopper plate 42 is placed on the floor plate 20 functions as a stopper for restricting the wheelchair from coming out from the front, the reduction-side oil passages of the elevation driving cylinders 38 and 39 are communicated, and the elevation is lowered. Driving cylinder 38,3
9 can be driven to expand and contract. In other words, the safety device is provided with an interlock function that prevents the floor plate 20 from moving up and down unless the stopper plate 42 functions as a stopper.

Reference numeral 60 denotes a relief valve.

The wheelchair lifting / lowering device according to the present invention, constructed as described above, operates as follows. That is, the floorboard 20
Is formed in a U-shaped cross section with both sides raised.
A pair of mold links 30 and 34 are respectively arranged between both sides of the base 10 and the floor plate 20, and the height of the rising portions 21 and 22 of the floor plate 20 is set to the height of the folded X-type link, and it is used to drive up and down. Since the cylinders 38 and 39 are arranged to fit within the height, when the X-type link is folded, the floor plate 2
0 can be located at a low position close to the base 10.

Therefore, the height of the floor plate 2 is not increased by the height of the X-shaped link 3 of the lifting drive device 5 folded, and a step from the low floor surface 6 to the floor plate 2 is minimized. Can be blocked. Therefore, it is not necessary to provide a space for providing a slope on the low floor surface 6 before the wheelchair elevating device is installed, and a disabled person using a wheelchair does not have to climb the slope in a wheelchair. . Further, it is not necessary to take a measure such as digging a hole from the low floor surface 6 by the height of the X-shaped link folded in advance and embedding the wheelchair lifting device.

Next, a case where a disabled person in a wheelchair moves from the low floor surface 6 to the high floor surface 7 will be described. As shown in FIGS.
34, the floor plate 20 is positioned at a low position close to the base 10, the hydraulic cylinder 43 is extended, and the end of the stopper plate 42 is brought into contact with the low floor surface 6 in advance.
As described above, the floor plate 20 is located at a position close to the base 10 and is located at a low position. In this state, the disabled person gets on the wheelchair, passes over the stopper plate 42, and
Get on top.

A disabled person who gets on the floor plate 20 while riding a wheelchair operates the switch of the operation box 46 to reduce the hydraulic cylinder 43. Then, the stopper plate 42 is rotated about the pivot point, and functions as a stopper so that the wheelchair does not protrude from the front. At this time, even if the switch for driving the elevation drive cylinders 38 and 39 is operated by mistake, the interlock function is activated and the elevation drive cylinder 3 is actuated.
8, 39 are not driven.

Next, the disabled person operates the switch of the operation box 46 to extend the lifting drive cylinders 38, 39. Then, the X-links 30 and 34 are opened to raise the floor plate 20. When the effective stroke predetermined by the regulating means 40, 41 is reached during the ascent, the extension of the elevation drive cylinders 38, 39 is regulated. At this time, the extension operation of the lifting drive cylinders 38, 39 is stopped. Floorboard 2
Since 0 is located on the high floor 7, a disabled person in a wheelchair moves the wheelchair to the high floor 7.

Conversely, in the case where a disabled person in a wheelchair moves from the high floor surface 7 to the low floor surface 6, the disabled person who gets on the floor plate 20 while riding the wheelchair operates the switch of the operation box 46. Contrary to the above, the lifting drive cylinder 3
If the hydraulic cylinder 43 is extended after reducing the size of the bases 8 and 39, the hydraulic cylinder 43 can be moved to the low floor surface 6.

In the above embodiment, the base 10 is constituted by one thin flat plate.
May be used as long as they connect the X-links 30 and 34 on the left and right. Also in this case, it is preferable that the thickness of the plate is thin in order to set the floor plate 20 low.

In the above embodiment, the floor plate 20 is integrally formed in a U-shape in cross section. However, the floor surface and the rising portions 21 and 22 may be separately formed and connected. Further, the L-shaped covers 44 and 45 may also be formed integrally with the floor plate 20.

Further, in the above embodiment, the stopper plate 4
2 and the hydraulic cylinder 43 have a stopper function and a gentle slope function.
Is determined by the thicknesses of the floor plate 20 and the base 10, and since these thicknesses are small, it is not necessary to provide a slope function. In addition, since the thickness of the floor plate 20 and the base 10 is small, the distal end portions of the floor plate 20 and the base 10 may be slightly slanted so that the wheelchair can easily enter the floor plate 20.

[0034]

As described above, the lifting device for a wheelchair according to the present invention is constructed and operates. Therefore, the height of the floor plate is increased by the height of the folded X-link of the lifting drive device. In addition, it is possible to prevent a step from a low floor surface to a floor plate from occurring. Therefore, it is not necessary to provide a space for providing a slope on a low floor surface before installing the wheelchair elevating device, and a disabled person using a wheelchair does not have to climb the slope in a wheelchair. Further, it is not necessary to take a measure such as digging a hole from the low floor by the height of the X-shaped link folded in advance and embedding the wheelchair lifting device.

[Brief description of the drawings]

FIG. 1 is an explanatory view illustrating a wheelchair elevating device of the present invention, showing a state in which an X-shaped link is opened, a floor plate is raised, and a cover is removed.

FIG. 2 is an explanatory view for explaining a wheelchair elevating device of the present invention, showing a state in which an X-shaped link is folded, a floor plate is lowered, and a cover is removed.

FIG. 3 is a side view of FIG. 1;

FIG. 4 is a side view of FIG. 2;

FIG. 5 is an explanatory diagram illustrating a hydraulic circuit diagram for driving the wheelchair lifting / lowering device of the present invention.

FIG. 6 is an explanatory view illustrating a conventional wheelchair elevating device,
The X-link is opened and the floor plate is raised.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Base 20 Floor board 21 Rise part 22 Rise part 30 X-type link 34 X-type link 38 Elevation drive cylinder 39 Elevation drive cylinder B Wheelchair elevating device

Claims (1)

[Claims] 1. A base made of a flat plate, a U-shaped floor plate arranged on the upper side of the base and raised on both sides, and a pair of base plates respectively arranged between both sides of the base and the floor plate. What is claimed is: 1. An elevator for a wheelchair, comprising: an X-shaped link for guiding a floor plate so as to be able to move up and down; and a lifting drive cylinder disposed on the X-link and driving the floor plate up and down via the X-link. The height is set to the height of the folded X-type link, the lifting drive cylinder is arranged to fit within the height, and the floor plate is placed on the base when the X-link is folded. A lifting device for a wheelchair, wherein the lifting device is configured to be located at a lower position close to the device.