JP3721807B2 - Wheelchair carrier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wheelchair carrier in which a wheelchair such as an electric wheelchair is equipped with devices such as an oxygen cylinder and a ventilator.
[0002]
[Prior art]
When a wheelchair user needs a device such as an oxygen cylinder or a ventilator, since such a device is large, conventionally, as shown in FIG. 4, for example, as shown in FIG. 140 is fixed through a bracket 148, and the fall-preventing wheel 149 is fixed in an arrangement protruding rearward from the rear wheel 22 (main wheel) of the wheelchair 110, so that the device A is mounted on the device mounting device 140. The device A is attached to the wheelchair 110 so as to be fixed via the fixing belt 141.
[0003]
[Problems to be solved by the invention]
As described above, when the device mounting instrument 140 is fixed to the rear portion of the wheelchair 110, the weight of the device A mounted on the device mounting instrument 140 is entirely applied to the wheelchair 110, so that the center of gravity of the wheelchair 110 moves backward. If the weight of the device A is large, the wheelchair 110 is likely to fall backward. Accordingly, the wheelchair 110 is prevented from falling by attaching the fall-preventing wheel 149, but when the fall-preventing wheel 149 is fixed, traveling performance such as turning of the wheelchair 110 is deteriorated.
[0004]
In view of such problems, an object of the present invention is to provide a wheelchair carrier capable of suppressing a decrease in performance of a wheelchair even when a heavy object such as an oxygen cylinder or a ventilator is mounted.
[0005]
[Means for Solving the Problems]
In the invention described in claim 1, provided with a carrier ya body attached to the rear side of the body frame of the wheelchair, the carrier body is an oxygen cylinder, for wheelchair carrying platform is that provided ventilator or the like is loaded a carrier, wherein the carrier body is then provided with a caster wheel for supporting the mounting portion in a lower portion, the horizontal direction turning axis connecting the left and right sides of the front end portion to a mounting member provided on the rear side of the vehicle body frame The carrier body is pulled by the body frame, and the rear side is pivotable up and down via the lateral rotation shaft, while the carrier body is positioned near the mounting member near the lateral rotation shaft. The rear side is provided with a rotation restricting portion that restricts upward rotation over a predetermined angle, and this carrier body is a fall prevention mechanism that prevents the wheelchair from falling backward. .
[0006]
According to the first aspect of the present invention, both the left and right sides of the front end portion of the carrier body are rotatably connected to the vehicle body frame side via the lateral rotation shaft, and the mounting portion is mounted by the caster wheels at the rear lower portion of the carrier body. Because it is supported, even if heavy objects such as oxygen cylinders and ventilators are mounted on the carrier body, the wheelchair body only takes part of its weight and prevents the wheelchair body from falling backwards In addition, since the rolling direction of the caster wheels is changed, it is possible to suppress a decrease in traveling performance such as backward movement and turning of the wheelchair body.
[0007]
In the first aspect of the present invention, an attachment member to which the carrier body is attached is mounted on the rear side of the vehicle body frame, and the carrier body and the attachment member are in contact with each other and are attached to the attachment member of the carrier body. A rotation restricting portion for restricting the upward movement is provided.
[0008]
According to the first aspect of the present invention, since the upward movement of the carrier main body is restricted, when the wheelchair main body tilts backward, the carrier main body acts as a fall prevention mechanism, and the wheelchair main body falls backward. This can be prevented more reliably.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of an electric wheelchair equipped with a carrier according to an embodiment of the present invention, and FIG. 2 omits the rear wheel, rear wheel drive mechanism, seat, seat back and the like of the electric wheelchair of FIG. FIG. FIG. 3 is an exploded perspective view of the carrier body and the mounting member in FIG.
[0010]
As shown in FIG. 1, an electric wheelchair 10 (wheelchair main body) to which the embodiment of the present invention is applied includes a vehicle body frame 11, and a pair of left and right front wheels 21 are provided below the vehicle body frame 11. A rear wheel 22 is attached. A seat 17 on which a user sits is supported above the body frame 11 via a seat frame 17f, and a seat back 18 on which the user hits the back is seat back frame 18f above the seat 17. An armrest 19 on which a user puts his / her arm is supported via an armrest support 19f above and to the left and right of the seat 17. Further, at the rear part of the vehicle body frame 11, a substantially U-shaped vehicle body lifting bar 14 that is open in the front is provided so as to protrude rearward and upward from the rear end of the frame side part 12.
[0011]
Further, as shown in FIG. 2, the rear wheel 22 (main wheel) is supported below the vehicle body frame 11 via a gear case 23 and a cushion unit 24 constituting a rear wheel suspension mechanism. A drive motor (not shown) for rotationally driving the rear wheel 22 is mounted. That is, the rear end portion of the gear case 23 and the lower end portion of the cushion unit 24 are rotatably connected via the lateral rotation shaft 25, and the front end portion of the gear case 23 protrudes below the frame side portion 12. The upper end of the cushion unit 24 is supported on the rear wheel support 15 of the vehicle body lifting bar 14 via the horizontal rotation shaft 26. And is rotatably supported. The rear wheel 22 is supported by a rear portion of the gear case 23 so as to be rotatable.
[0012]
An attachment member 30 to which the carrier body 40 is attached is attached to the rear lower side of the body frame 11 of the electric wheelchair 10. As shown in FIG. 3, the attachment member 30 includes a horizontally long pipe-like lower connecting portion 31, and includes an upper extending portion 32 and a front upper extending portion 33 at both left and right ends of the lower connecting portion 31. A substantially V-shaped pipe-shaped attachment portion in side view is fixed by welding. A bracket 35 is fixed to the upper end of the upper extension member 32 by welding, and a bracket 36 is fixed to the front end of the front upper extension 33 by welding.
[0013]
As shown in FIG. 2, the mounting member 30 has an upper extension portion 32 disposed behind the rear wheel drive mechanism including the gear case 23, a drive motor, and the like, and a front upper extension portion 33 is provided at the front lower side of the rear wheel drive mechanism. The bracket 35 at the upper end of the upper extension portion 32 is pivotally connected to the rear wheel support portion 15 on the rear side via the lateral rotation shaft 26, and the bracket at the front end portion of the front upper extension portion 33. 36 is supported by the vehicle body frame 11 so as to be pivotably connected to the front rear wheel support portion 13 via the lateral pivot shaft 27. In this manner, by supporting the mounting member 30 on the rear wheel support portions 13 and 15 having relatively high strength, the carrier body 40 can be connected to the vehicle body frame via the mounting member 30 without significantly modifying the vehicle body frame 11. 11 can be attached.
[0014]
As shown in FIG. 3, the carrier body 40 includes a substantially U-shaped pipe-shaped frame portion 42 that is open to the front, and a horizontal pipe-shaped pivot is provided at the front end of the carrier body 40. The restricting portion 43 is fixed so as to connect the front end portions on the left and right sides of the frame portion 42. Brackets 44 protruding forward are fixed to the left and right sides of the front end portion of the frame portion 42 by welding, and a plate-like mounting portion 41 is welded to the frame portion 42 and the rotation restricting portion 43. It is fixed. Further, below the center of the rear end of the carrier body 40, caster wheels including a support member 47 and wheels 49 are mounted so as to support the mounting portion 41. That is, the support member 47 is rotatably supported by the frame portion 42 via a vertical rotation shaft (not shown), and the wheel 49 is rotated below the support member 47 via a horizontal rotation shaft 48. The horizontal rotation shaft 48 is disposed at a position shifted from directly below the vertical rotation shaft.
[0015]
As shown in FIG. 2, the carrier body 40 is configured such that the left and right brackets 44 at the front end of the frame portion 42 are attached to the lower extension portions 32 on the left and right sides via a lateral rotation shaft 37 such as a bolt. connected rotatably, it is mounted on the rear side of the mounting member 30. The carrier body 40 is pulled by the body frame 11 via the mounting member 30 and is rotated so as to move the rear end side up and down. As shown by the two-dot chain lines in FIGS. When 40 rotates upward by a predetermined angle or more with respect to the attachment member 30, the rotation restricting portion 43 and the lower portion ( rotation restricting portion ) of the upper extending portion 32 come into contact with each other, thereby restricting the upward rotation. It is configured to be.
[0016]
In the wheelchair carrier configured as described above, even if a heavy object such as an oxygen cylinder or a ventilator is placed on the mounting portion 41 of the carrier body 40, a part of the weight is caster wheels (support members). 47, wheels 49) and the electric wheelchair 10 (wheelchair body) takes only a part of the weight of an oxygen cylinder or the like, so that the electric wheelchair 10 can be prevented from falling backward. Further, when the electric wheelchair 10 is tilted rearward, the rotation restricting portion 43 of the carrier main body 40 and the lower portion of the upper extending portion 32 of the attachment member 30 come into contact with each other, and the carrier main body 40 acts as a fall prevention mechanism. Can be reliably prevented from falling backward. Further, when the electric wheelchair 10 travels, the carrier main body 40 swings up and down so as to follow the unevenness of the road surface, and when the electric wheelchair 10 moves backward or turns, caster wheels (47, 49). Since the rolling direction is not changed and the vehicle does not become an obstacle such as backward driving or turning, it is possible to suppress a decrease in traveling performance of the electric wheelchair 10.
[0017]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. For example, in the above-described embodiment, the case where the attachment member is attached to the rear side of the vehicle body frame and the carrier body is attached to the attachment member has been described. However, the carrier body is attached directly to the vehicle body frame. Also good.
[0018]
【The invention's effect】
According to the first aspect of the present invention, both the left and right sides of the front end portion of the carrier body are rotatably connected to the vehicle body frame side via the lateral rotation shaft, and the mounting portion is mounted by the caster wheels at the rear lower portion of the carrier body. Because it is supported, even if heavy objects such as oxygen cylinders and ventilators are mounted on the carrier body, the wheelchair body only takes part of its weight and prevents the wheelchair body from falling backwards In addition, since the rolling direction of the caster wheels is changed, it is possible to suppress a decrease in traveling performance such as backward movement and turning of the wheelchair body.
[0019]
Further, since the upward movement of the key Yariya body is restricted, it is possible to wheelchair body acts as a carrier body is anti-tip mechanism tilts rearward, more reliably prevent the wheelchair body to fall backward .
[Brief description of the drawings]
FIG. 1 is a side view of an electric wheelchair equipped with a carrier according to an embodiment of the present invention.
2 is an enlarged view in which the rear wheel, the rear wheel drive mechanism, the seat, the seat back, and the like of the electric wheelchair in FIG. 1 are omitted.
3 is an exploded perspective view of the carrier body and the mounting member in FIG. 1. FIG.
FIG. 4 is a perspective view showing an example of a conventional wheelchair carrier.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Electric wheelchair 11 Body frame 12 Frame side part 13 Rear wheel support part 14 Car body lifting bar 15 Rear wheel support part 17 Seat 17f Seat frame 18 Seat back 18f Seat back frame 19 Armrest 19f Armrest frame 21 Front wheel 22 Rear wheel 23 Gear case (Rear wheel drive mechanism)
24 Cushion unit 25, 26, 27 Lateral rotation shaft 30 Mounting member 31 Lower connection portion 32 Upper extension portion ( rotation limiting portion )
33 Front upper extension 35, 36 Bracket 37 Lateral rotation shaft 40 Carrier body 41 Mounting portion 42 Frame portion 43 Rotation restriction portion 44 Bracket 47 Support member (caster wheel)
48 Horizontal rotation axis (Caster wheel)
49 wheels (caster wheels)

Claims (1)

Provided with a carrier ya body attached to the rear side of the body frame of the wheelchair, said carrier body is an oxygen cylinder, a wheelchair carrier mounting portion ventilator or the like is placed is that provided,
The carrier body is provided with caster wheels for supporting the mounting portion at the lower portion thereof (rotatably on the mounting portion), and the left and right sides of the front end portion are connected to mounting members provided on the rear side of the vehicle body frame. While being pulled by the main body frame via a horizontal rotation shaft, the rear side can be turned up and down via the horizontal rotation shaft, while being close to the mounting member near the horizontal rotation shaft. A rotation restricting portion for restricting the rear side of the carrier body from turning upward by a predetermined angle or more,
A carrier for a wheelchair characterized in that the carrier body is a fall prevention mechanism that prevents the wheelchair from falling backward .

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