JP2000140031A - Carrier for wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize the performance reduction of a wheelchair, and make a heavy article such as an oxygen bomb or a respirator loadable. SOLUTION: On the rear side of an attaching member 30 on the lower rear side of a body frame 11, a carrier main body 40 is rotatably connected in such a manner that both right and left sides of the front end portion are connected with a lateral rorating shaft 37, and fitted in such a manner that the carrier main body 40 is towed by the main body frame 11, and at the same time, the rear side may be vertically movable. On the rear lower side of the carrier main body 40, caster wheels (47, 49) are fitted in a manner to support a loading section 41. On the front end portion of the carrier main body 40, a fall-preventing section 43 is provided in such a manner that an upward rotation may be restricted by a contact with an upward extended section 32 of the attaching member 30. On an electrically operated wheelchair 10 (wheelchair main body), only one part of the weight of an oxygen bomb or the like on the loading section 41 is applied, and when the electrically operated wheelchair 10 tilts backward, the carrier main body 40 works as a fall-preventing mechanism, and a fall to the rear side is prevented from occurring. The rotating direction of the caster wheels (47, 49) changes, and the caster wheels do not become an obstacle for a reversing and a turning or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier for a wheelchair in which devices such as an oxygen cylinder and a respirator are mounted on a wheelchair such as an electric wheelchair.

[0002]

2. Description of the Related Art When a user of a wheelchair needs equipment such as an oxygen cylinder and a ventilator, such equipment is large in size, and conventionally, as shown in FIG.
At the rear of the device 10, the device mounting device 140 is attached to the bracket 148.
And a wheel 149 for preventing the vehicle from tipping over.
Is fixed in a position protruding rearward from the rear wheel 22 (main wheel) of the wheelchair 110, and the device A
The device A is attached to the wheelchair 110 such that the device A is fixed via the fixing belt 141.

[0003]

As described above, when the device mounting device 140 is fixed to the rear portion of the wheelchair 110, the entire weight of the device A mounted on the device mounting device 140 is applied to the wheelchair 110. The center of gravity of the wheelchair 110 moves rearward, and if the weight of the device A is large, the wheelchair 110 easily falls backward. Therefore, the fall of the wheelchair 110 is prevented by mounting the fall prevention wheel 149. However, when the fall prevention wheel 149 is fixed, the running performance such as turning of the wheelchair 110 is reduced.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a wheelchair carrier capable of suppressing a decrease in wheelchair performance even when a heavy object such as an oxygen cylinder or a respirator is mounted. And

[0005]

According to the first aspect of the present invention, there is provided a carrier body attached to a rear side of a body frame of a wheelchair, and an oxygen cylinder, an artificial respirator and the like are mounted on the carrier body. A mounting part is provided, and the carrier body is rotatably connected to the body frame side via lateral rotation shafts on both left and right sides of the front end so that the carrier body is pulled by the body frame and moves the rear side up and down. ,
Caster wheels for supporting the mounting portion are mounted on the lower rear portion of the carrier body.

According to the first aspect of the present invention, the left and right sides of the front end of the carrier main body are rotatably connected to the vehicle body frame via the horizontal rotation shaft, and the caster wheels at the rear lower portion of the rear of the carrier main body. Since the mounting part is supported, even if a heavy object such as an oxygen cylinder or a ventilator is mounted on the carrier body, only a part of the weight is applied to the wheelchair body, and the wheelchair body falls backward. In addition, since the rolling direction of the caster wheels changes, it is possible to suppress a decrease in running performance such as a backward movement and a turn of the wheelchair body.

Further, in the invention according to claim 2,
A mounting member to which the carrier body is mounted is mounted on the rear side of the body frame, and the carrier body and the mounting member are provided with an overturn preventing portion that abuts on each other and restricts the upward movement of the carrier body with respect to the mounting member. Have been.

According to the second aspect of the present invention, since the upward movement of the carrier main body is restricted, when the wheelchair main body is tilted backward, the carrier main body acts as a fall prevention mechanism,
It is possible to more reliably prevent the wheelchair body from falling backward.

[0009]

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 a rear wheel, a rear wheel drive mechanism, a seat, a seat back and the like of the electric wheelchair of FIG. FIG. And
FIG. 3 is an exploded perspective view of the carrier main body and the mounting member in FIG.

As shown in FIG. 1, an electric wheelchair 10 (wheelchair main body) to which an embodiment of the present invention is applied is provided with a body frame 11, and a pair of right and left parts is provided below the body frame 11. A front wheel 21 and a rear wheel 22 are mounted.
A seat 17 on which a user sits is supported above the vehicle body frame 11 via a seat frame 17f, and a seat back 18 on which the user rests on the back is provided above and behind the seat 17 with a seat back frame 18f. An armrest 19 on which the user places his / her arm is supported by armrest supports 19f on the left and right of the seat 17.
Is supported through. At the rear of the body frame 11, a substantially U-shaped body-lifting bar 14 having a front opening and having a plan view shape is provided to protrude rearward and upward from the rear end of the frame side part 12.

As shown in FIG. 2, a rear wheel 22 (main wheel) is supported below the body frame 11 via a gear case 23 and a cushion unit 24 constituting a rear wheel suspension mechanism. A drive motor (not shown) that rotationally drives the rear wheel 22 is mounted on the drive 23. That is, the rear end of the gear case 23 and the lower end of the cushion unit 24 are rotatably connected via the horizontal rotation shaft 25, and the front end of the gear case 23 projects below the frame side portion 12. The upper end of the cushion unit 24 is rotatably supported by the rear wheel support portion 13 via a horizontal rotation shaft 27.
5 is rotatably supported via a horizontal rotation shaft 26. The rear wheel 22 is rotatably supported by a rearward portion of the gear case 23.

The body frame 1 of the electric wheelchair 10
A mounting member 30 to which the carrier main body 40 is mounted is mounted on the lower rear side of 1. As shown in FIG. 3, the mounting member 30 includes a horizontally long pipe-shaped 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 side view pipe-shaped mounting portion is fixed by welding. And
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.

Then, as shown in FIG.
Is arranged rearward of a rear wheel drive mechanism including a gear case 23, a drive motor, and the like,
3 is disposed in front of and below the rear wheel drive mechanism, and the upper extension 32
The upper end bracket 35 is rotatably connected to the rear rear wheel support portion 15 via the horizontal rotation shaft 26, and the front end bracket 36 of the front upper extension portion 33 is connected to the front rear wheel support portion 13.
Are supported by the vehicle body frame 11 so as to be rotatably connected via a horizontal rotation shaft 27. in this way,
The attachment members 30 are attached to the rear wheel support portions 13 and 15 having relatively high strength.
, The carrier main body 40 can be attached to the body frame 11 via the attachment member 30 without making significant modifications to the body frame 11.

The carrier body 40 is, as shown in FIG.
The carrier body 40 is provided with a pipe-shaped frame portion 42 having a substantially U-shape which is opened forward and having a front end portion of the carrier body 40.
It is fixed so as to connect the front end portions on both left and right sides of the camera.
A bracket 44 protruding forward is fixed to the left and right sides of the front end of the frame part 42 by welding, and a plate-shaped mounting part 41 is fixed to the frame part 42 and the fall prevention part 43 by welding. Have been. A caster wheel including a support member 47, a wheel 49, and the like is mounted below the rear end center portion of the carrier body 40 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 wheels 49 rotate below the support member 47 via the horizontal rotation shaft 48. It is mounted freely, and the horizontal rotation shaft 48 is arranged at a position shifted from immediately below the vertical rotation shaft.

As shown in FIG. 2, the carrier main body 40 includes a bracket 44 on both left and right sides at the front end of the frame portion 42 and a horizontal rotation shaft 37 such as a bolt attached to a lower portion of the upper extension 32 on both left and right sides. And is attached to the rear side of the mounting member 30 via a rotatable connection. And the carrier body 4
0 is pulled by the main body frame 11 via the mounting member 30 and rotates so as to move the rear end side up and down, and as shown by a two-dot chain line in FIGS.
When 0 rotates upward by a predetermined angle or more with respect to the mounting member 30, the overturn prevention portion 43 and the lower portion (overturn prevention portion) of the upwardly extending portion 32 come into contact with each other, thereby restricting the upward rotation. It is configured as follows.

In the wheelchair carrier configured as described above, even if a heavy object such as an oxygen cylinder or a respirator is placed on the mounting portion 41 of the carrier body 40, a part of the weight is caster wheel. (Support member 47, wheel 4
9), and only a part of the weight of the oxygen cylinder or the like is applied to the electric wheelchair 10 (wheelchair main body), so that the electric wheelchair 10 can be prevented from falling backward. Further, when the electric wheelchair 10 is tilted backward, the carrier body 40
And the lower part of the upper extension 32 of the mounting member 30 abuts, and the carrier body 40 acts as a fall prevention mechanism, so that the electric wheelchair 10 can be reliably prevented from falling backward. When the electric wheelchair 10 travels, the carrier body 40 swings up and down so as to follow the unevenness of the road surface. Since the rolling direction of the wheelchair does not change and does not cause an obstacle such as backward movement or turning, it is possible to suppress a decrease in the running performance of the electric wheelchair 10.

The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments. For example, in the above embodiment, the case where the mounting member is mounted on the rear side of the body frame and the carrier body is mounted on the mounting member has been described, but the carrier body is mounted directly on the body frame. Is also good.

[0018]

According to the first aspect of the present invention, the left and right sides of the front end of the carrier main body are rotatably connected to the vehicle body frame side via the horizontal turning shaft, and the casters at the rear lower portion of the rear of the carrier main body. Since the mounting part is supported by wheels, even if a heavy object such as an oxygen cylinder or ventilator is mounted on the carrier body, only a part of the weight is applied to the wheelchair body, and the wheelchair body moves backward. It is possible to prevent the vehicle from falling down and change the rolling direction of the caster wheels, so that it is possible to suppress a decrease in running performance such as backward movement and turning of the wheelchair body.

According to the second aspect of the present invention, since the upward movement of the carrier main body is restricted, when the wheelchair main body is tilted backward, the carrier main body acts as a fall prevention mechanism, and the wheelchair main body is moved backward. It is possible to more reliably prevent the vehicle from falling down.

[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.

FIG. 2 is an enlarged view in which a rear wheel, a rear wheel drive mechanism, a seat, a seat back, and the like of the electric wheelchair of FIG. 1 are omitted.

FIG. 3 is an exploded perspective view of a carrier main body and a mounting member in 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 Body lift 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 Horizontal rotation axis 30 Mounting member 31 Lower connecting part 32 Upper extension part (fall-over prevention part) 33 Front upper extension part 35, 36 Bracket 37 Horizontal rotation axis 40 Carrier body 41 Mounting part 42 Frame part 43 Fall prevention part 44 Bracket 47 Support member (Caster wheel) 48 Lateral rotation axis (Caster wheel) 49 Wheel (Caster wheel)

Claims (2)

[Claims] 1. A carrier body attached to a rear side of a body frame of a wheelchair is provided, and the carrier body is provided with a mounting portion on which an oxygen cylinder, a respirator, and the like are mounted, and the carrier body is provided with the main body. The left and right sides of the front end are rotatably connected to the vehicle body frame side via a horizontal rotation shaft so as to be pulled by the frame and move the rear side up and down. A wheelchair carrier, wherein caster wheels for supporting the mounting portion are mounted. 2. A mounting member to which the carrier main body is mounted is mounted on a rear side of the vehicle body frame, and the carrier main body and the mounting member are in contact with each other and an upper portion of the carrier main body with respect to the mounting member. 2. The wheelchair carrier according to claim 1, further comprising an overturn preventing portion for restricting movement to the wheelchair.