JP2005021600A - Lifting device for wheelchair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lifting device for a wheelchair by which transfer into a room with a step is easily and safely performed. <P>SOLUTION: The device includes a support base (2) with wheels(5, 7) arranged in front and rear parts and a grip (8) projected upward in a rear part. The support base (2) comprises a lifting base (10) to be vertically moved by a driving device (15). The lifting base (10) comprises a pair of guide rails (12) for guiding the rear wheels (46) of the wheelchair (25) to the right and left; a frame receiver (11a) which is projected upward to be higher than the guide rails (12) in the middle left and right, so as to receive the front side of the lower frame (27) of the wheelchair (25); and a stopper (14) for restricting the backward movement of the wheelchair (25) in the rear part, in a state where the front wheels (45) of the wheelchair (25) are projected forward from the lifting base (10). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a lifting device for a wheelchair that can easily transfer a wheelchair on which a cared person is mounted to a stepped portion.

As a conventional lifting device, a mast is fixed upright on the rear part of a support base having wheels on the front and rear sides, and a planar load platform (lift platform) is attached to the mast so as to be movable up and down. There has been a lifting device (stacker) that is moved up and down by an electric winch (see, for example, Non-Patent Document 1).

Further, as a wheelchair on which a cared person is mounted, a side link-shaped side frame is rotatably connected to the left and right sides of the base frame, and a seat is attached between the side frames to form a chair main body. By connecting a rear leg to the rear frame of the side frame so as to be able to rotate rearward and downward, connecting a screw shaft that can be moved forward and backward to the side frame and the rear leg, and moving the screw shaft forward and backward. There has been a foldable wheelchair in which the chair main body has a planar shape or a chair shape (for example, see Patent Document 1).
Japan Society of Mechanical Engineers, Mechanical Engineering Handbook revised 6th edition, published March 20, 1982, 16th edition, page 44, 148 JP 2002-177334 A (first page)

In the non-patent document 1, the front and rear wheels of the wheelchair roll on the upper surface of a flat loading platform (lifting platform), and thus the wheelchair is easy to move on the loading platform and has poor safety. Moreover, since the lowered loading platform was higher than the floor surface, a slope was required to get on and off the wheelchair on the floor surface. In addition, it is easy to remove the wheelchair when getting on and off the wheelchair, and the caregiver needs careful maneuvering. It is an object of the present invention to obtain a novel wheelchair lifting device that solves the above-mentioned problems.

The present invention is configured as follows to achieve the above object. That is, the invention according to claim 1 is provided with a support base having wheels at the front and rear and a handle protruding upward at the rear, and a lift base that is moved up and down by a drive device on the support base. The lifting platform is provided with a pair of guide rails for guiding the rear wheel of the wheelchair on the left and right sides, and a frame receiver that protrudes above the guide rail and receives the front side of the lower frame of the wheelchair at the middle of the left and right sides. The wheelchair has a configuration in which a stopper for restricting the wheelchair from moving backward is provided in a state where the front wheel of the wheelchair protrudes forward from the platform.
According to a second aspect of the present invention, as the lifting platform, a shallow inverted container-shaped container main body that loosely fits the support base from above, and flanges that protrude outward from the lower left and right ends of the container main body. The flange is used as a guide rail for guiding the rear wheel of the wheelchair, and the top plate of the container main body is used as a frame receiver for receiving the front side of the lower frame of the wheelchair.
According to a third aspect of the present invention, the cylinder mechanism forming the driving device is supported upright on the rear side of the support base, and the upper end of the cylinder mechanism is fixed upright on the rear part of the main body of the inverted container. A parallel link mechanism is provided between the front part of the support base and the front part of the container main body part.

In the invention according to claim 1 of the present invention, the pair of guide rails provided on the left and right sides of the lifting platform guide the left and right rear wheels of the wheelchair, so that the wheelchair can be safely moved on and off the lifting platform. In addition, the wheelchair placed on the platform is in a state in which the front wheel protrudes forward from the platform by the stopper, and the left and right rear wheels of the wheelchair are supported by the rear side of each guide rail. The front side of the lower frame is supported by the frame receiver. For this reason, the wheelchair is supported by the lifting platform while being held substantially horizontally, and is supported so as not to move back and forth with respect to the lifting platform by frictional contact with the frame receiver.
In the invention according to claim 2, since guide rails for guiding the left and right rear wheels of the wheelchair are provided at the left and right lower ends of the container main body part in which the support base is loosely fitted from above, the guide rail is provided on the floor surface. The wheelchair on the floor can easily get on and off the lift platform. Further, since the lower frame on the front side of the wheelchair is supported by the top plate portion of the container main body, the lower frame can be supported in a wide area, and the supported wheelchair becomes stable. .
According to a third aspect of the present invention, the elevating table is moved up and down by a cylinder mechanism standing upright on the rear side of the support table, and is moved up and down by a parallel link mechanism provided between the front part of the support table and the front part of the container main body. This prevents rolling of the base with respect to the support base, so that the base can be made small and can be moved up and down stably.

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, FIG. 1 is a perspective view when the lifting device according to the present invention is raised, FIG. 2 is a side view showing the state of getting on and off the wheelchair when the lifting device according to the present invention is lowered, and FIG. FIG. 4 is a side view of the wheelchair and FIG.

In FIG. 1, reference numeral 1 denotes a lifting device for a wheelchair, which includes a support base 2, a lifting base 10, and a driving device 15 as main components. The support base 2 integrally connects a pair of left and right support frames 3, 3 extending in the front-rear direction by a cross frame 4 on the rear side (left side in FIG. 1), and is connected to the front end of each support frame 3, 3. A front wheel 5 is attached, a bracket 6 is protruded and fixed to the left and right ends of the cross frame 4 rearward, and a rear wheel 7 with a brake made of casters is attached to the bracket 6. 7a is a brake lever. Further, a gate-shaped handle 8 is fitted and fixed to the cross frame 4 so as to face upward, and the support 2 is operated by holding the handle 8.

A lifting platform 10 that is moved up and down by a driving device 15 is attached to the support platform 2. This lifting platform 10 forms a shallow inverted container-shaped container main body 11 for loosely fitting the support base 2 from the upper side, and has a flange 12 elongated in the front-rear direction at the lower left and right sides of the container main body 11 outward. Further, the gate-shaped receiving body 13 is fixed upright at the rear end of the container main body 11. The flange 12 is a guide rail on which a rear wheel 46 of a wheelchair 25 to be described later rolls, and the top plate portion 11a of the container main body 11 is a frame receiver that supports the front side of the lower frame 27 of the wheelchair 25. . Further, stoppers 14 extending upward from the rear end portions of the flanges 12 are attached to the left and right rear portions of the container main body portion 11. The stopper 14 receives the rear wheel 46 of the wheelchair 25 placed on the lifting platform 10 and projects the front wheel 45 of the wheelchair 25 forward from the lifting platform 2.

The driving device 15 that moves the elevator 10 up and down includes a hydraulic cylinder mechanism 16. The cylinder mechanism 16 is erected between the rear side of the support base 2 (left part in FIG. 1) and the receiving body 13 of the lifting base 10, and the cylinder case 16a is connected to the support base 2 and the piston thereof. The upper end of the rod 16b is connected to the upper inner surface of the receiving body 13. The operating lever 17 for applying hydraulic pressure to the lower side of the cylinder case 16a extends from the support base 2 toward the upper rear part, and a pedal 17a is attached to the upper end of the operating lever 17, and the piston 17a is depressed to depress the piston. The rod 16b is moved upward, and the lifting platform 10 is raised through the piston rod 16b. Further, the release bar 18 for releasing the application of hydraulic pressure to the lower side of the cylinder case 16a extends upward and is connected to the cross bar 9 provided at the upper and lower intermediate portions of the handle 8, and the knob 18a is provided at the upper end thereof. Is attached, and the knob 18a is operated to release the hydraulic pressure applied to the lower side of the cylinder case 16a, and the piston rod 16b is moved downward by the weight of the lifting platform 10 so that the lifting platform 10 is lowered.

The parallel link mechanism 20 is provided between the front portion of the support base 2 and the front portion of the lifting platform 10. That is, a pair of link arms 20a and 20b are provided in which two arms are pivotally connected by a pin P1 at the upper and lower intermediate portions, and the link arms 20a and 20b are provided inside the support frame 3 and the container main body 11. The upper and lower ends (right ends in FIG. 1) of each front portion are rotatably connected to the support frames 3 and the container main body 11 by pins P2, respectively. The upper and lower ends (left end in FIG. 1) of the rear side are connected to the support frames 3 and the container main body 11 through the guide grooves 21 so as to be slidable back and forth. Thereby, when the lifting platform 10 is moved up and down by the driving device 15, the parallel link mechanism 20 prevents the lifting platform 10 from rolling with respect to the support platform 2.

The wheelchair 25 described above is as shown in FIG. In FIG. 4, 25 is a foldable wheelchair, and 26 is a chair main body of the wheelchair. The chair main body 26 is provided with a fork-shaped lower frame 27 whose rear side is divided into two, and a pair of parallel link side frames 28, 28 are rotatably connected to the left and right sides of the lower frame 27. That is, the front frames 29, 29 are connected to the front sides of the lower frame 27, and the rear frames 30, 30 are connected to the back sides of the lower frame 27 by fulcrum pins (fulcrum shafts) P1, P2, respectively. The armrest frames 31 and 31 and the seat frames 32 and 32 parallel to the lower frame 27 are separated between the front frames 29 and 29 and the rear frames 30 and 30 in the vertical direction by the fulcrum pins P3 to P6. Connect movably.

The left and right rear frames 30 and 30 are integrally connected by bending a square pipe into an inverted U shape, and projecting upward from the front frame 29, and a seat back 33 is formed on the projecting portion. Removably attach. Further, a handle portion 30a is attached to the upper rear surface side of the left and right rear frames 30,30. Then, the plastic armrest 34, the seat 35, and the legrest 13 are attached to the front portions of the armrest frame 31, the seat frame 32, and the lower frame 27, respectively. The seat 35 has a defecation hole (not shown) that can be opened and closed at the center.

The rear legs 37 and 37 are connected to the upper and lower intermediate parts of the left and right rear frames 30 and 30 via a fulcrum pin P7 so as to be able to rotate back and forth, and are rotated rearward and downward. Telescopic actuators 38 and 38 that are extendable and retractable are connected to the middle part and the upper ends of the left and right rear frames 30 and 30 via pivot pins P8 and P9, respectively. Motors 39 and 39 for extending and retracting the operating members 38 and 38 in synchronization with each other are attached to the upper end portions of the 38, and the motors 39 and 39 are controlled to rotate forward and backward by a remote control switch 41. The remote control switch 41 is connected to a control box (not shown) attached to the upper end between the rear frames 30 and 30 via a lead wire 41a.

Cylindrical guides 43 are attached to the left and right side frames 28, 28. That is, the guide 43 is arranged in parallel with the lower frame 27 and the seat frame 32 at the upper and lower intermediate portions, and the front and rear ends thereof are rotated to the front frame 29 and the rear frame 30 via the fulcrum pins P10 and P11. Connect as possible. A rod 44 is fitted to the guide 43 so as to be slidable back and forth, and a rear end portion of the rod 44 is pivotally connected to lower portions of the rear legs 37 and 37 via a fulcrum pin P12. This prevents the rear legs 37, 37 from rolling. Further, the front wheels 45, 45 made of casters are attached to the front end portion of the lower frame 27, the rear wheels 46, 46 are attached to the lower end portions of the rear legs 37, 37, and the small-diameter auxiliary wheel 47 is attached to the rear end portion of the lower frame 27. 47 are attached.

When the cared person 50 is transferred between the wheelchair 25 and the bed, the wheelchair 25 is folded into a plane as shown by the phantom line in FIG. 4, and the cared person 50 is transported to a bathroom or toilet, etc. In doing so, the wheelchair 25 is expanded into a chair shape as shown by the solid line in FIG. In this case, when there is a step in the middle of the conveyance path, for example, between the corridor 51 where the toilet is located and the Japanese-style room 52, the lifting and lowering device 1 described above is used for transfer. That is, as shown in FIG. 2, when the lifting device 1 is placed on the corridor 51 side, the release bar 18 is operated, the cylinder mechanism 16 is shortened to lower the lifting platform 10, and the lifting platform 10 is guided. The rail 12 approaches the floor surface. In this state, as shown by the solid line in FIG. 2, when the wheelchair 25 is moved rearward and moved to the lifting platform 10, the rear wheel 46 rolls on the guide rail 12, and the rear wheel 46 moves to the guide rail 12. When it reaches the rear end, it collides with the stopper 14 and the position of the wheelchair 25 with respect to the lifting platform 10 is determined. As shown by the phantom line in FIG. It will be in a slightly protruding state.

In this state, when the pedal 17a of the lifting device 1 is repeatedly depressed and the cylinder mechanism 16 is extended to raise the lifting platform 10, the top plate portion of the container main body 11 of the lifting platform 10, that is, the frame receiver 11a is moved. The front portion of the lower frame 27 of the wheelchair 25 is lifted, and the guide rail 12 lifts the rear wheel 46 of the wheelchair 25. As a result, the wheelchair 25 is supported horizontally, and is supported by the lifting platform 10 so as not to move due to frictional contact between the frame receiver 11a and the lower frame 27, and is raised. As shown in FIG. 3, when the height of the guide rail 12 of the lifting platform 10 becomes the same level as the surface of the Japanese room 52, the brake lever 7 a of the lifting device 1 is operated to lock the rear wheel 7, As shown by the solid line in FIG. 3, the wheelchair 25 is moved forward to the Japanese-style room 52. In addition, when moving the wheelchair 25 from the Japanese-style room 52 to the hallway 51, an operation reverse to the above is performed.

It is a perspective view at the time of the raising operation | movement of the raising / lowering apparatus by this invention. It is a side view which shows the boarding / alighting state of the wheelchair at the time of the descent | fall operation of a raising / lowering apparatus. It is a side view which shows the boarding / alighting state of the wheelchair at the time of the raising operation | movement of a raising / lowering apparatus. It is a side view of a wheelchair.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lifting device 2 Support stand 3 Support frame 4 Cross frame 5 Front wheel 6 Bracket 7 Rear wheel 7a Brake lever 8 Handle 9 Cross bar 10 Lift stand 11 Container main part 11a Top plate part (frame support)
12 Flange (guide rail)
13 Receiver 14 Stopper 15 Drive device 16 Cylinder mechanism 16a Cylinder case 16b Piston rod 17 Actuation lever 17a Pedal 18 Release bar 18a Knob 20 Parallel link mechanism 20a, 20b Link arm 21 Guide groove 25 Folding wheelchair 26 Chair main body 27 Base frame 28 Side frame 29 Front frame 30 Rear frame 30a Handle 31 Armrest frame 32 Seat frame 33 Backrest 34 Armrest cover 35 Seat 36 Footrest 37 Rear leg 38 Actuator 39 Motor 40 Control box 41 Remote control switch 41a, 42a Lead wire 42 Plug 43 Guide 44 Rod 45 Front wheel 46 Rear wheel 47 Auxiliary wheel 50 Care recipient 51 Corridor 52 Japanese-style room

Claims (3)

A support base (2) having wheels (5, 7) at the front and rear and a handle (8) protruding upward at the rear is provided, and the support base (2) is moved up and down by a drive device (15). The elevator (10) is provided with a pair of guide rails (12) for guiding the rear wheel (46) of the wheelchair (25) on the left and right, and the guide rail (10) 12), a frame receiver (11a) that protrudes upward from the front side of the lower frame (27) of the wheelchair (25) is provided, and the front wheel (45) of the wheelchair (25) is provided at the rear side from the lifting platform (10). A lifting device for a wheelchair comprising a stopper (14) for restricting the backward movement of the wheelchair (25) in a state of protruding forward. The lifting platform (10) protrudes outward from a shallow inverted container-shaped container main body (11) in which the support base (2) is loosely fitted from above, and from the lower left and right ends of the container main body (11). And the flange is a guide rail (12) for guiding the rear wheel (46) of the wheelchair (25), and the top plate of the container main body (11) is the lower frame (27) of the wheelchair (25). The wheelchair lifting device according to claim 1, wherein the frame receiving portion (11a) is configured to receive the front side of the wheelchair. A cylinder mechanism (16) that constitutes the drive device (15) is supported upright on the rear side of the support base (2), and the upper end portion of the cylinder mechanism (16) is an inverted container-shaped container main body (11). A parallel link mechanism (20) is provided between the front part of the support base (2) and the front part of the container main body part (11). The lifting device for a wheelchair according to claim 2, wherein

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