JP2001206680A - Lift device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower a lift plate to the vicinity of a lower floor surface with the mechanism of a lift itself. SOLUTION: This lift device is used when a wheelchair or the like passes through a step section. A base 1 is installed on the lower floor surface, and a lift plate 2 is horizontally supported on the base 1 via X-link mechanisms 3. Heave sections 9 are formed at both side edges of the lift plate 2, the cylinder tubes 15 of hydraulic cylinders 4 are vertically fitted to the side end sections of the step sections of the heave sections 9, and piston rods 17 are connected to the base 1. The lift plate 2 is driven by the hydraulic cylinders 4 at the stroke corresponding to the height difference between an upper floor surface and the lower floor surface, and the X-link mechanisms 3 are stored in the heave sections 9 at the lower limit position of the lift plate 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift device used when a wheelchair, a cart, or the like passes through a step.

[0002]

2. Description of the Related Art Conventionally, as a lift device of this type, FIG.
The technique shown in FIG. In this lift device, an elevating plate 53 is supported on a base 51 via an X-link mechanism 52, a hydraulic cylinder 54 is provided diagonally between the base 51 and the X-link mechanism 52, and the elevating plate 53 is It is configured to drive between the floor LF and the upper floor UF.

[0003]

However, according to this lift device, the X-link mechanism 52 and the hydraulic cylinder 54 are stored below the elevating plate 53 at the time of lowering.
The lifting plate 53 could not be lowered close to the lower floor LF. For this reason, conventionally, ancillary equipment such as attaching a slope 55 in front of the base 51 or digging a lower floor LF to construct a pit (not shown) is required. In the case of the slope 55, a wheelchair or the like is required. It was difficult to get in and out of the pit, and in the case of a pit, the equipment cost was high and the installation location was sometimes limited.

It is an object of the present invention to provide a lift device capable of lowering a lift plate to a position close to a lower floor by a mechanism of the lift itself.

[0005]

In order to solve the above-mentioned problems, a lift device according to the present invention is a device used when a wheelchair, a cart or the like passes through a step, and is installed on a lower floor. Base, an elevating plate on which a wheelchair or a cart is placed, an X-link mechanism for horizontally supporting the elevating plate on the base, and a drive for driving the elevating plate with a stroke corresponding to a height difference between the lower floor and the upper floor. Means, wherein the driving means is provided vertically between the base and the lift plate, a ridge is formed on a side edge of the lift plate, and the X-link mechanism is stored inside the ridge at the lower limit position of the lift plate. It is composed of

The driving means includes a ball screw, a rack,
Although a pinion or a chain can be used, a hydraulic cylinder is preferable because a lifting plate can be smoothly driven with a large thrust. In the lift device of the present invention, a hydraulic cylinder is used as the driving means, a cylinder tube of the hydraulic cylinder is attached to the lifting plate, and a piston rod of the hydraulic cylinder is connected to the base.

In this case, it is desirable to dispose the hydraulic cylinder on the side of the step. In the lift device of the present invention, a side rail for guiding the rollers of the X-link mechanism is provided on the side edge of the base, and the side rail and the protrusion are provided. A fulcrum shaft of the X-link mechanism is provided at an end of the portion on the side of the step portion, and a cylinder tube is mounted near the fulcrum shaft of the raised portion.

Further, if a handrail is provided on the cylinder tube and on the side opposite to the fulcrum shaft of the raised portion, the cylinder tube can be used as a support for the handrail. Further, in order that a wheelchair or the like can easily get on and off the upper floor, it is preferable to provide an operation member that rotatably attaches a crossover plate to an edge of a step portion side of the elevating plate and raises and lowers the crossover plate on a handrail.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1, 2, and 3 show a lift device used when a wheelchair, a cart, and the like pass through the step S. The lift device includes a base 1 installed on a lower floor LF and a lifting plate 2 on which a wheelchair or the like is mounted.
An X-link mechanism 3 for horizontally supporting the lifting plate 2 on the base 1; and two left and right hydraulic cylinders for driving the lifting plate 2 with a stroke corresponding to a height difference H between the lower floor LF and the upper floor UF. 4 is provided.

The base 1 is formed in a thin rectangular frame shape with two side rails 6 provided on both left and right side edges thereof and three front and rear flat bars 7 connecting the side rails 6. The elevating plate 2 is formed of a thin plate having substantially the same size as the base 1, and a non-slip sheet 8 is adhered to an upper surface thereof, and a lower open ridge 9 is formed on both left and right edges.

The X link mechanism 3 is constituted by connecting a pair of left and right X-shaped links 10 with four joint plates 11. The upper and lower fulcrum shafts 12 of the link 10 are provided at the step side end of the raised portion 9 and the side rail 6, that is, at the front end of the lift device, and the upper and lower rollers 13 of the link 10 are moved by the raised portion 9 and the side rail 6. You will be guided.

The two hydraulic cylinders 4 are provided vertically between the base 1 and the elevating plate 2 at the front end of the lift device in an inverted posture. Mounted nearby. The piston rod 17 is the cylinder tube 15
The lower end is connected to the base 1 via a flow control valve 18 so as to supply pressure oil to the base 1.

The right and left flow control valves 18 (only one is shown) are connected to a hydraulic unit 20 via a pipe 19, and the two hydraulic cylinders 4 are extended and contracted by the same amount of hydraulic oil in the same stroke. 2 is the upper limit position (solid line position in FIG. 2) at the same height as the upper floor UF and the lower floor LF
The link 10 of the X-link mechanism 3 is located at the lower limit position (the chain line position in FIG.
(See FIG. 3). The flat bar 7 of the base 1 and the joint plate 11 of the X-link mechanism 3 are assembled at a lower limit position where they do not overlap with each other, and the elevating plate 2 overlaps these members 7 and 11.

The lifting plate 2 includes two handrails 22 on the left and right sides for a wheelchair occupant or a pedestrian, a transfer plate 23 used for getting on and off the upper floor UF, and a lever as an operation member for raising and lowering the transfer plate 23. 24 and a chain 25 for preventing falling. Each handrail 22 is a cylinder tube 15
And a rear end of the raised portion 9 (opposite the fulcrum shaft side), and a lever 24 is supported by one handrail 22. The crossover plate 23 is rotatably attached to the front edge (edge on the side of the step) of the elevating plate 2, and is connected to the lever 2 via the thin bar 26.
4.

In the lift device having the above-described structure, when the user climbs the stepped portion S in a wheelchair, first, the lift plate 2 is arranged at the lower limit position, the chain 25 is removed, and the wheelchair is put on the lift plate 2. Let In this case, since the X-link mechanism 3 is stored inside the raised portion 9, the elevating plate 2 corresponds to the position close to the lower floor LF, that is, the sum of the thicknesses of the elevating plate 2 and the flat bar 7 (10 mm or less). The user can remove the wheelchair from the lower floor LF without using the slope.
It can be moved easily.

Next, the hydraulic cylinder 4 is extended, the elevating plate 2 is raised in the horizontal state, and stopped at the upper limit position having the same height as the upper floor UF. Hang over. In this way, there is no possibility that the movement of the wheelchair is hindered by the gap between the lifting plate 2 and the upper floor UF, and the user can easily get down from the lifting plate 2 to the upper floor UF.

When descending from the step S, the lifting plate 2 is arranged at the upper limit position, and the wheelchair is put on the lifting plate 2 from the upper floor UF via the crossover plate 23, and the handrail 22 is grasped for stability. Secure. Since the handrail 22 is attached using the cylinder tube 15, there is an advantage that the number of parts can be reduced. Thereafter, the hydraulic cylinder 4 is contracted, the elevating plate 2 is lowered in a horizontal state and stopped at the lower limit position, and the wheelchair is moved from the elevating plate 2 to the lower floor LF.
Move to Also at this time, since the lifting plate 2 is disposed close to the lower floor LF, the user can smoothly descend from the lifting plate 2 to the lower floor LF.

The present invention is not limited to the above embodiment. For example, a ball screw, a rack and pinion, or a chain may be used instead of a hydraulic cylinder.
The shape and configuration of each part can be appropriately changed without departing from the spirit of the present invention.

[0019]

As described above in detail, according to the lift device of the present invention, the lift plate can be lowered close to the lower floor by the mechanism of the lift itself. For this reason, a slope is unnecessary, and a wheelchair, a cart, and the like can easily get on and off, and the installation space of the lift device can be reduced. In addition, since pit construction is not required, the equipment cost can be reduced, the installation location of the lift device is not limited, and there is an effect that it can be easily relocated. Furthermore, since the drive means is provided vertically, power can be transmitted efficiently, the cost can be reduced by using a small-diameter hydraulic cylinder, etc. is there.

[Brief description of the drawings]

FIG. 1 is a perspective view of a lift device according to an embodiment of the present invention.

FIG. 2 is a side view of the lift device.

FIG. 3 is a sectional view taken along line AA of FIG. 2 showing a main part of the lift device at the time of descent.

FIG. 4 is a side view showing a conventional lift device.

[Explanation of symbols]

1. Base, 2. Lift plate, 3. X-link mechanism, 4. Hydraulic cylinder, 6. Side rail, 9.
Protrusion, 12 fulcrum shaft, 13 roller, 15 cylinder tube, 17 piston rod, 22 handrail, 23 crossover plate, 24 lever, S step portion,
H ... Height difference, LF ... Lower floor, UF ... Upper floor.

Claims (5)

[Claims] 1. A device used when a wheelchair, a cart, or the like passes through a stepped portion, wherein the base is installed on a lower floor, an elevating plate on which the wheelchair, a cart, etc. are placed, and An X-link mechanism, and a driving means for driving the lifting plate with a stroke corresponding to a height difference between the lower floor surface and the upper floor surface, and the driving means is provided vertically between the base and the lifting plate, A lift device having a raised portion formed on a side edge of the lifting plate and configured to store the X-link mechanism inside the raised portion at a lower limit position of the lifting plate. 2. A hydraulic cylinder is used as a driving means, and a cylinder tube of the hydraulic cylinder is attached to an elevating plate,
The lift device according to claim 1, wherein the piston rod of the hydraulic cylinder is connected to the base. 3. A side rail for guiding the roller of the X-link mechanism is provided on a side edge of the base, and a fulcrum axis of the X-link mechanism is provided at an end of the side rail and the protruding portion on the side of the step. 3. A cylinder tube is mounted on the cylinder.
The lift device as described. 4. The lift device according to claim 3, wherein a handrail is provided on the cylinder tube and on a side opposite to the fulcrum shaft of the raised portion. 5. The lift device according to claim 4, wherein a crossover plate is rotatably mounted on an edge of the lifting plate on the side of the step, and an operation member for raising and lowering the crossover plate is provided on a handrail.