JP2001104395A - Wheel support device for wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow occupants with different physiques to easily get on and off the seat of a wheelchair and to make it easier for the occupant seated on the seat to do manual input operations on each wheel, etc. SOLUTION: The wheelchair 1 includes a pair of right and left wheels 3, 3 arranged near the outer sides of the rear of a body frame 2, a support means 4 for freely detachably supporting each wheel 3 against the side of the rear end of the body frame 2, a caster 6 supported against the front end of the body frame 2, and a seat 12 disposed between the right and left wheels 3, 3 and supported against the body frame 2. The position of the axle 24 of each wheel 3 relative to the body frame 2 can be varied longitudinally and vertically by the support means 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel support device for a wheelchair provided with support means for supporting a pair of left and right wheels with respect to a vehicle body frame so as to be capable of changing their positions.

[0002]

2. Description of the Related Art Conventionally, the above-mentioned wheelchair has been disclosed in
There is one disclosed in Japanese Patent No. 4562.

According to the above-mentioned publication, a wheelchair is provided with a pair of left and right wheels arranged near each outer side of a rear portion of a body frame, and these wheels are detachably attached to respective side portions of a rear end of the body frame. , A caster supported at the front end of the vehicle body frame, and a seat disposed between the left and right wheels and supported at an intermediate portion in the front-rear direction of the vehicle body frame.

[0004] The vehicle body frame is supported on a running surface by the wheels and the casters, and human power and / or power from an electric motor is selected for the wheels by operation of a passenger sitting on a seat on the vehicle body frame. When the wheelchair is input, the wheelchair can run on the running surface.

[0005]

In the above-mentioned conventional technology, the height of the wheelchair seat relative to the running surface is constant, while the physique such as the height of the occupant in the wheelchair is not constant. For this reason, there is a possibility that an occupant of a certain physique may have difficulty in getting on and off the seat for sitting on or leaving the seat.

In order to match the height of the seat to the physique of the occupant, the wheels are made replaceable with other wheels having different outer diameters, so that the height of the seat is reduced. It is possible to make it changeable.

However, if the wheels are simply replaced in this way, the position of the replaced wheels with respect to the seat on the upper side is automatically set to a certain size.
This may make it difficult for a passenger sitting on the seat to perform an operation such as inputting human power to the wheels.

[0008] On the other hand, it is desired that a camber angle be given to each wheel according to the passenger's preference or the like so that straightness during traveling can be obtained more reliably.
No such consideration has been made.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and enables passengers of different physical sizes to easily get on and off a wheelchair seat. Another object of the present invention is to make it easy for a passenger sitting on a seat to perform an operation such as inputting human power to each wheel.

It is another object of the present invention to achieve the above object without increasing the weight of a wheelchair and with a simple structure.

It is another object of the present invention to provide a camber angle to each of the wheels according to a passenger's preference and the like, and to achieve this with a simple configuration.

[0012]

A wheel supporting device for a wheelchair according to the present invention for solving the above problems is as follows.

The invention according to claim 1 includes a pair of left and right wheels 3, 3 disposed near each outer side of a rear portion of a body frame 2,
Support means 4 for detachably supporting each of the wheels 3 on each side of the rear end of the body frame 2, casters 6 supported on the front end of the body frame 2, and left and right wheels 3, 3 In a wheelchair provided with a seat 12 disposed between and supported by the body frame 2,

Each wheel 3 with respect to the body frame 2
The position of the axle 24 can be changed in the front-back direction and the up-down direction by the support means 4.

According to a second aspect of the present invention, in addition to the first aspect, the support means 4 includes a bracket body 33 attached to each side of a rear end of the vehicle body frame 2, and the bracket body 33 A pivot arm 36 pivotally supported about an axis 34 extending in the vehicle body width direction and fixed at an arbitrary rotational position.
Further, a plurality of axle support portions 38 for detachably supporting the axles 24 of the respective wheels 3 are provided in the longitudinal direction of the rotating arm 36.

The invention according to claim 3 is the invention according to claim 1 or 2
In addition to the invention, the vehicle body frame 2 includes a rear end frame 17a which constitutes each side of the rear end and extends in the front-rear direction. The bracket body 33 is movable,
Further, it can be freely fixed at an arbitrary moving position.

According to a fourth aspect of the present invention, in addition to the third aspect of the present invention, the bracket body 33 is rotatable around the axis of the rear end frame 17a and can be fixed at an arbitrary rotating position. It was done.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes an electric wheelchair, and an arrow Fr indicates the front thereof.

The wheelchair 1 includes a vehicle body frame 2 constituting a vehicle body, a pair of left and right wheels 3, 3 disposed near the left and right outer sides of a rear portion of the vehicle body frame 2, and these wheels 3 are attached to the vehicle body. Support means 4 for detachably supporting each side of the rear end of the frame 2, a pair of left and right casters 6, 6 disposed near each side of the front end of the body frame 2, and each of these casters 6 is the body frame 2
And other supporting means 7 to be supported on each side of the front end portion.

The wheelchair 1 has a driving means 9 for rotating each of the wheels 3 and a power supply means 10 for supplying electric power to the driving means 9 and driving the driving means 9 by the supply. A lever-type operating means 11 connected to the control means for the driving means 9 and the power supply means 10 and enabling each wheel 3 to move forward, backward, and shift through the driving means 9 by input of an operating force; A seat 12 disposed between the upper parts of the left and right wheels 3 and 3 and supported at an intermediate portion of the body frame 2 in the front-rear direction so as to enable a passenger to sit in a forward posture; and a front end of the body frame 2 And a footrest 13 supported by the seat 12 and capable of placing a foot of a passenger sitting on the seat 12.

Then, the vehicle body frame 2 is supported on the running surface 14 by the wheels 3, 3 and the casters 6, 6, and the vehicle seat 2 is seated on the vehicle body frame 2 by the occupant. 3 input human power and / or
Alternatively, the operation of the operating means 11 causes the driving means 9
Is driven to input the power to each of the wheels 3,
The wheelchair 1 can travel on the traveling surface 14 such as forward and backward.

The body frame 2 is formed by framing a metal pipe having a circular cross section. A pair of left and right lower frames 17, 17 extending in the front-rear direction is provided above the lower frames 17, 17. And a pair of left and right upper frames 18 extending in the front-rear direction. The front ends of the upper frames 18 are bent downward, and the lower ends thereof and the front ends of the lower frames 17 are joined to each other.

The vehicle body frame 2 extends in the vehicle body width direction and connects the rear ends of the left and right upper frames 18 to each other. The rear cross member 19 extends in the vehicle body width direction and the left and right upper frames 18 extend in the vehicle body width direction. , 18 and a front cross member 20 for connecting the middle portions in the longitudinal direction to each other, and a rear end portion of each of the lower frames 17 is connected to a middle portion in the longitudinal direction of the rear cross member 19.

1 to 6, each wheel 3 has an axle 24 whose axis 23 extends in the width direction of the vehicle body and is detachably supported on the body frame 2 via the support means 4; A wheel body 25 supported so as to be rotatable around the axis 23; a disk-shaped bracket plate 26 located on the axis 23 and fixed to the axle 24; A stopper pin 27 projecting from the bracket plate 26 so as to be engaged with the vehicle body frame 2 via the support means 4 so as to be detachably engaged with the vehicle body frame 2 and preventing free rotation of the axle 24 around the axis 23; An annular hand rim 29 is provided on the shaft center 23 near the outer periphery of the wheel body 25 and is supported by the support plate 28 on the bracket plate 26.

When a passenger sitting on the seat 12 grips the hand rim 29 and inputs human power to the hand rim 29 so as to rotate about the axis 23, the wheel body 25 rotates together with the hand rim 29. Running surface 14
The wheelchair 1 can travel on the top.

3 to 6, the vehicle body frame 2
Are a pair of right and left rear end frames 17a, 17 which constitute each side of the rear end and extend substantially parallel to each other in the front-rear direction.
a, and each of these rear end frames 17 a is constituted by the rear end of each of the lower frames 17.

Each of the support means 4 includes a bracket 33 which is detachably attached to the rear end frame 17a of each of the lower frames 17 by a fastener 32, and an axis 34 extending in the vehicle width direction with respect to the bracket 33. A rotating arm 36 (see FIG. 3 for ease of understanding of the drawing), which is rotatably pivoted around as shown by an arrow A in the figure and is freely fixed by a fastener 35 at an arbitrary rotating position. (Shown in a pattern).

A plurality of (two) axle support portions 37 and 38 for detachably supporting the axle 24 of the wheel 3 are provided on the rotating arm 36 in the longitudinal direction of the rotating arm 36. Each of the axle support portions 37 and 38 is formed in the rotation arm 36 and has a male screw hole 40 having an axis parallel to the axis 34, and is screwed into the male screw hole 40 on the axis of the male screw hole 40. The axle 24
And a sleeve 41 which is fitted and removably fitted and supported.

Of the axle support portions 37 and 38, the axle 24 is selectively inserted into the inner hole of one of the sleeves 41.
Are adapted to be removably fitted. A retaining means 42 for holding the axle 24 fitted in the sleeve 41 in the fitted state is provided. The release of the retaining by the retaining means 42 can be released by an operation from outside the wheel 3.

The inner hole of the sleeve 41 of one of the axle support portions 37, 38 is located on the axis 34, which is the center of rotation of the rotation arm 36.
The other axle support portion 38 is located on the rotation end side of the rotation arm 36. In the illustrated example, the axle 24 is fitted and supported in the sleeve 41 of the one axle support portion 37, and at this time, the two shaft centers 23 and 34 are located coaxially.

As described above, each axle support portion 37, 38
When the axle 24 is removably fitted into and supported by any of the above, the stopper pin 27 is removably locked to prevent free rotation of the axle 24 about the axis 23. Means 44 is provided on the bracket body 33. The detent means 44 comprises the bracket body 33
(3) locking holes 45, 4 in the vertical direction
The stopper pins 27 are selectively fitted into any one of the locking holes 45, 46, and 47 so that the stopper pins 27 can be detachably fitted therein and locked.

The wheel 3 can be exchangeably supported by the support means 4 with another wheel 3 having a different outer diameter.

1 to 6, the axle 24 is fitted into the sleeve 41 of the one axle support portion 37 located on the axle 34, and the wheel 3 is supported by the body frame 2. At this time, the bracket plate 26 is attached to the axle 24.
The stopper pin 27 that is connected via the stopper is locked in a locking hole 46 in the vertical direction in the rotation preventing means 44 in the vertical direction. In this case, the seat 12 is in the “normal height state” with respect to the running surface 14.

As shown by the solid line in FIGS. 1 to 6, the rotating arm 36 is rotated upward about the axis 34 and fixed to the bracket body 33 by the fastener 35. When the axle 24 is fitted into the sleeve 41 of the other axle support portion 38 provided on the rotation end side of the bracket body 33 and the wheel 3 is supported on the body frame 2, the stopper pin 27 rotates It is locked in the upper locking hole 45 in the stopping means 44.

In the above case, if the wheels 3 having the same outer diameter as the wheels 3 in the "normal height state" are used, the height of the seat 12 with respect to the running surface 14 is reduced. If the wheel 3 is replaced with another wheel 3 having an outer diameter smaller than this, the height of the seat 12 is further reduced.

On the other hand, as shown by the imaginary line in FIG. 6 and FIG. 7, the rotating arm 36 is rotated downward around the axis 34 and fixed to the bracket 33 by the fastener 35. When the axle 24 is fitted into the sleeve 41 of the other axle support portion 38 provided on the rotation end side of the bracket body 33 to support the wheel 3 on the body frame 2, the stopper pin 27 It is locked in the lower locking hole 47 in the rotation preventing means 44.

In the above case, if the wheels 3 having the same outer diameter as the wheels 3 in the "normal height state" are used, the height of the seat 12 with respect to the running surface 14 is increased. If the wheel 3 is replaced with another wheel 3 having an outer diameter larger than this, the height of the seat 12 is further increased.

That is, the axle 24 is locked to one of the axle support portions 37 and 38, the turning position of the turning arm 36 is changed, and the outer diameter of the wheel 3 is selected. When combined with the above, the height of the seat 12 can be adjusted according to the physique of the occupant, and the height of the upper side of the wheel 3 with respect to the seat 12 can be adjusted without being affected by this adjustment. The height of the upper side of the wheel 3 can be adjusted for a passenger sitting on the seat 12.

In the above case, the caster 6 and the footrest 13 can move up and down and can be fixed at an arbitrary moving position with respect to the front end of the body frame 2, so that the height of the seat 12 can be adjusted. The movement of the casters 6 and the footrest 13 may be adjusted accordingly.

It is to be noted that, even if the axle 24 is locked to any of the axle support portions 37 and 38 of the rotating arm 36, the stopper pin 27
May be locked to the detent means 44.

As shown by phantom lines and arrows B in FIGS.
7a is movable back and forth along its longitudinal direction,
Further, the bracket body 33 can be freely fixed at an arbitrary moving position by the fastener 32.

Wheel 3 accompanying movement of bracket body 33
The front-rear position adjustment of the upper side of the wheel 3 with respect to the seat 12 can be performed by the front-rear position adjustment of
The position of the upper part of the wheel 3 in the front-rear direction can be adjusted for the occupant sitting on the seat 12.

As shown by the imaginary line and arrow C in FIGS. 2 and 5, the rear end frame 17a has a circular cross section, and the bracket body 3 is formed around the axis of the rear end frame 17a.
3 is rotatable, and the bracket 33 is freely fixed at its arbitrary rotation position by the fastener 35.

Wheel 3 accompanying rotation of bracket body 33
, The camber angle θ of the wheel 3 can be adjusted. In order to maintain the camber angle θ, in addition to the fixing by the fastener 35, the left and right bracket bodies 3
A connecting tool 49 for connecting the third and the third 33 to each other is provided. Note that the connecting tool 49 may be a turnbuckle type.

In FIGS. 1 and 2, the driving means 9 has an electric motor 51 supported by the bracket plate 26 and capable of rotating and driving the wheel body 25 of the wheel 3 via a speed reducing means (not shown).

The power supply means 10 is disposed so as to straddle the rear and lower vicinity of the seat 12, and is supported at substantially the center of the vehicle body frame 2 in the vehicle width direction. The power supply means 10 includes a case-shaped battery holder 54 which is detachably supported by a fastener 53 on the rear cross member 19 in front of the rear cross member 19 of the vehicle body frame 2. 1
As shown by the middle virtual line, a battery 55 is fitted and supported so as to be able to be detachably inserted from above. The battery 55 has a battery main body 56 having only one end fitted into the battery holder 54 and a grip 57 formed at a protruding end which is the other end of the battery main body 56 protruding from the battery holder 54. And

Note that even when the wheelchair 1 is placed on a horizontal surface with the wheels 3 removed from the wheelchair 1, the battery 55 can be freely inserted into and removed from the battery holder 54 from above. It is said that this fitting operation can be easily performed.

The battery holder 54 is provided with an input terminal which is detachably connected to an output terminal of a battery body 56 of the battery 55, and the electric motors 51 are connected to the input terminal by wiring. I have. When the battery 55 is fitted into the battery holder 54, the terminals are automatically connected, and the electric power from the battery 55 can be supplied to the electric motors 51. On the other hand, when the battery 55 is detached from the battery holder 54, the terminals are automatically cut off, and the battery 55 can be charged in another predetermined facility.

In FIGS. 1, 2, 8, and 9, the sheet 1
Reference numeral 2 denotes a seat portion 61 supported by the vehicle body frame 2 and allowing only one passenger to sit thereon, and protruding upward from a rear end of the seat portion 61 and seated on the seat portion 61. And a backrest portion 62 on which the occupant can rest. The seat 61 includes a seat frame 63 also used as the upper frame 18 of the vehicle body frame 2, and a cushion 64 supported by the seat frame 63, and the backrest 62 has a gate-like shape in a front view. Backrest frame 65
And a cushion 66 supported by the backrest frame 65.

In the above case, the power supply means 10 is arranged near the rear lower portion of the rear end of the seat portion 61 and the lower end of the backrest portion 62 facing each other. This power supply means 1
0 may be disposed near the back of the backrest portion 62 of the seat 12 and supported by the rear cross member 19.

The seat 12 has a pivotal support 67 for pivotally supporting its lower end to the upper frame 18 of the vehicle body frame 2 so that the backrest portion 62 can rotate back and forth (arrow D in FIG. 1). The seat portion 61 and the backrest portion 62 are provided on the respective sides of the seat portion 61 and extend rearward and upward.
A pair of left and right armrests 68 made of resin for restraining the upper occupant from the left and right and allowing the arm to be mounted thereon;
A pivotal support 69 for pivotally supporting the front end of the armrest 68 to the seat frame 63 of the seat 61 so that each of the armrests 68 is rotatable up and down (arrow E in FIG. 1), and a rear end of the armrest 68. Locking means 70 for locking the portion (rotating end) to the side of the backrest portion 62 in a detachable manner.

The locking position of the backrest 62 with respect to the rear end of the armrest 68 can be freely changed in the front-rear direction by the locking means 70, and this change allows the backrest 62 to be seated on the seat 61. Can be selected according to the physique and the like of the passenger.

8 and 9, the locking means 70 is
A plurality of locking portions 72, which are locking pins provided so as to protrude outward from the side portions of the backrest portion 62, and a plurality of front and rear locking portions are provided at the rear end of the armrest 68. A locked portion 73 that is a locking hole that is removably locked to the stop portion 72; a spring 74 that elastically holds the locked state of the locked portion 73 with respect to the locking portion 72; It has.

As shown by the phantom lines in FIGS. 8 and 9, by applying an external force to the spring 74 to elastically deform the spring 74, the locking of the locked portion 73 with the locking portion 72 is released. When the rear end portion of the armrest 68 is elastically bent outward from the locking portion 72 side, and the locked portion 73 is disengaged from the locking portion 72, the backrest portion 62 , And the armrest 68 are allowed to freely rotate.

Therefore, when the wheelchair 1 is not used and stored,
At the time of transport, as shown by the phantom line in FIG. 1, the backrest portion 62 was rotated forward and downward to overlap the backrest portion 62 on the upper surface of the seat portion 61, and the wheels 3 were removed from the support means 4. Thereafter, the armrest 68 is rotated downward so as to overlap the seat portion 61 and the body frame 2 in a side view, and is mounted on the rotating arm 36 of the support means 4 to make the wheelchair 1 compact. be able to.

The armrest 68 is provided so as to cover the outer peripheral surface of the wheel body 25 of the wheel 3 from above, and also serves as a mudguard.

The armrest 68 includes an armrest body 68a having a rear section extending in the vehicle width direction and covering the outer peripheral surface of the wheel body 25 from above, and an armrest body 68a extending from the edge of the armrest body 68a on the seat 12 side. A reinforcing portion 68b integrally protruding downward to reinforce the armrest main body 68a, and the reinforcing portion 68b is
The mud splashed up by the wheels 3 is more reliably prevented from going to the seat 12 side.

According to the above configuration, the position of the axle 24 of each wheel 3 with respect to the body frame 2 can be changed by the support means 4 in the front-rear direction and the up-down direction.

Therefore, if the position of the axle 24 of each wheel 3 is variously changed with respect to the body frame 2, the height of the seat 12 with respect to the running surface 14 can be adjusted to fit the physique of the occupant, and the seat 12 can be adjusted. , The height of the upper side of the wheel 3 and the position in the front-rear direction can be adjusted.

Therefore, according to the above-mentioned adjustment, even if the occupants of different physiques can easily get on and off the seat 12 of the wheelchair 1 and get on and off the seat 12, each wheel by the occupant sitting on the seat 12 can be easily adjusted. 3 has an effect that an operation such as an input of human power to 3 can be easily performed.

Further, as described above, the wheels 3 having different outer diameters can be selectively exchangeably supported on the support means 4.

Therefore, the adjustment of the height of the seat 12 with respect to the running surface 14 and the adjustment of the height of the upper portion of the wheel 3 with respect to the seat 12 can be avoided while avoiding mutual interference. The “effect” becomes more remarkable.

Further, as described above, the support means 4 includes a bracket 33 attached to each side of the rear end of the body frame 2 and an axis 34 extending in the vehicle width direction with respect to the bracket 33. A rotatable arm 36 rotatably supported at a predetermined position and a rotatable arm 36. The axle 2 of each wheel 3 is attached to the rotatable arm 36.
A plurality of axle support portions 38 for detachably supporting the rotation arm 4 are provided in the longitudinal direction of the rotating arm 36.

For this reason, even if the number of the axle support portions 38 is small, if the turning arm 36 is turned and fixed to the bracket body 33 upward or downward, the wheel 3 can be supported on the body frame 2. The position can be selected more than the number of the axle support portions 38.

Therefore, as described above, since the number of axle support portions 38 formed on the rotation arm 36 of the support means 4 can be reduced, the size of the rotation arm 36 can be reduced.
Can be lightened, that is, the above-mentioned “effect” is achieved without increasing the weight of the wheelchair 1.

As described above, the body frame 2
Has a rear end frame 17a which constitutes each side of the rear end and extends in the front-rear direction.
7a along the longitudinal direction of the bracket body 33.
Is movable and can be fixed at an arbitrary moving position.

Therefore, if the bracket 33 is moved and fixed together with the wheel 3 with respect to the rear end frame 17a, the position of the wheel 3 with respect to the vehicle body frame 2 is adjusted, and the "effect" becomes more remarkable. Become.

Since the rear end frame 17a, which is a part of the body frame 2, is used for the adjustment, the above "effect" can be achieved with a simple configuration.

Also, as described above, the rear end frame 1
The bracket body 33 is rotatable around the axis of 7a and can be fixed at an arbitrary rotation position.

For this reason, if the bracket 33 is rotated by a predetermined angle together with the wheel 3 around the rear end frame 17a and fixed, the camber angle θ can be adjusted, and the running state of the wheelchair 1 can be changed by the occupant. Can be matched to the preference of the user.

Since the rear end frame 17a which is a part of the vehicle body frame 2 and the support means 4 are used for adjusting the camber angle θ, the adjustment of the camber angle θ is simple. Achieved in configuration.

[0073]

The effects of the present invention are as follows.

According to the first aspect of the present invention, a pair of left and right wheels disposed near each outer side of the rear portion of the vehicle body frame, and these wheels are detachably supported on respective side portions of the rear end portion of the vehicle body frame. In a wheelchair provided with a supporting means, a caster supported at a front end portion of the vehicle body frame, and a seat disposed between the left and right wheels and supported by the vehicle body frame,

The position of the axle of each wheel with respect to the body frame can be changed in the front-rear direction and the up-down direction by the support means.

Therefore, if the position of the axle of each wheel is variously changed with respect to the vehicle body frame, the height of the seat relative to the running surface can be adjusted to fit the physique of the occupant, and the upper portion of the wheel relative to the seat can be adjusted. The height and the position in the front-back direction can be adjusted.

Therefore, according to the above adjustment, even if the occupants have different physiques, they can easily get on and off the seat of the wheelchair and get on and off the wheelchair, and the human power on each wheel by the occupant seated on the seat can be obtained. "Effects" that operations such as input of an image can be easily performed.

According to a second aspect of the present invention, the support means includes a bracket attached to each side of a rear end of the vehicle body frame, and is rotatable about an axis extending in the vehicle width direction with respect to the bracket. A pivot arm pivotally supported by the pivot arm, and an axle support portion for detachably supporting an axle of each wheel is provided on the pivot arm. A plurality is provided in the longitudinal direction.

For this reason, even if the number of the axle support portions is small, if the turning arm is rotated upward or downward and fixed to the bracket body, the wheel support position with respect to the vehicle body frame can be changed. Can be selected more than the number.

Therefore, as described above, since the number of axle support portions formed on the rotating arm of the supporting means can be reduced, the size of the rotating arm can be reduced and the weight of the supporting means can be reduced. Is achieved without increasing the weight of the wheelchair.

According to a third aspect of the present invention, the vehicle body frame comprises:
A rear end frame that constitutes each side of the rear end and extends in the front-rear direction is provided.The bracket body is movable along the longitudinal direction with respect to the rear end frame, and at an arbitrary moving position. It can be fixed freely.

For this reason, if the bracket body is moved together with the wheels with respect to the rear end frame and fixed, the position of the wheels with respect to the vehicle body frame is adjusted, and the “effect” described above is achieved.
Is more remarkable.

Since the rear end frame which is a part of the vehicle body frame is used for the adjustment, the above "effect" can be achieved with a simple configuration.

According to a fourth aspect of the present invention, the bracket body is rotatable around the axis of the rear end frame, and is freely fixable at an arbitrary rotation position.

For this reason, if the bracket body is rotated by a predetermined angle together with the wheels around the rear end frame and fixed, the camber angle can be adjusted, and the running state of the wheelchair matches the passenger's preference and the like. Can be done.

Since the rear end frame which is a part of the vehicle body frame and the supporting means are used for adjusting the camber angle, the adjustment of the camber angle can be achieved with a simple structure. .

[Brief description of the drawings]

FIG. 1 is an overall side view of a wheelchair.

FIG. 2 is an overall rear view of the wheelchair.

FIG. 3 is a partially enlarged view of FIG. 1;

FIG. 4 is a plan view of what is shown in FIG.

FIG. 5 is a sectional view taken along line 5-5 in FIG. 3;

FIG. 6 is an exploded perspective view of what is shown in FIGS.

FIG. 7 is a diagram for explaining the operation and is a diagram corresponding to FIG. 3;

FIG. 8 is a partially enlarged view of FIG. 1;

9 is a sectional view taken along line 9-9 of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wheelchair 2 Body frame 3 Wheel 4 Support means 6 Caster 7 Support means 9 Drive means 10 Power supply means 11 Operating means 12 Seat 14 Running surface 17a Rear end frame 23 Axis 24 Axle 25 Wheel body 33 Bracket body 34 Axis center 36 times Moving arm 37, 38 Axle support part θ Camber angle

Claims (4)

[Claims] 1. A pair of left and right wheels disposed near each outer side of a rear portion of a vehicle body frame, supporting means for detachably supporting the wheels on respective side portions of a rear end portion of the vehicle body frame, In a wheelchair including a caster supported at a front end of a body frame and a seat disposed between the left and right wheels and supported by the body frame, the position of the axle of each wheel with respect to the body frame is supported. A wheel supporting device in a wheelchair which can be changed in the front-rear direction and the vertical direction by means. 2. The bracket according to claim 1, wherein said support means is pivotally supported about a bracket attached to each side of a rear end of said vehicle body frame, and is rotatable about an axis extending in a vehicle width direction with respect to said bracket. And a rotating arm that can be fixed at an arbitrary rotating position, and a plurality of axle support portions for detachably supporting the axles of the respective wheels are provided on the rotating arm in the longitudinal direction of the rotating arm. The wheel support device for a wheelchair according to claim 1. 3. The vehicle body frame includes a rear end frame that constitutes each side of the rear end and extends in the front-rear direction. The bracket body is attached to the rear end frame along the longitudinal direction. 3. The wheel supporting device for a wheelchair according to claim 1, wherein the wheel supporting device is movable and can be fixed at an arbitrary moving position. 4. The wheel support device for a wheelchair according to claim 3, wherein the bracket body is rotatable around an axis of the rear end frame, and is freely fixed at an arbitrary rotation position.