JPH11169412A - Wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust the attaching height and front-and-back direction attaching position of the wheel of a wheelchair and to prevent the wheel from being slightly moved to a main body frame. SOLUTION: In this wheelchair, a vertical plate 80 on one side and the vertical plate 81 on the other side are clamped and attached to the main pipe 3 and auxiliary pipe 10 of the main body frame, and a wheel attaching member 14 is prepared. A main shaft 90 is fitted to one of plural wheel attaching holes 84 with intervals in the vertical direction of the vertical plate 80 on one side and the wheel 15 is prepared. Thus, by slightly loosening a bolt 88, the wheel attaching part 14 is moved back and forth along the main pipe 3 and the auxiliary pipe 10 and the wheel attaching position is adjusted back and forth. Also, by fitting the main shaft 90 to the different wheel attaching holes 84, the wheel attaching height is adjusted. Also, since the wheel attaching member 14 and the main shaft 90 do not rattle, the wheel 15 is not slightly moved to the main body frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a wheelchair.

[0002]

2. Description of the Related Art A wheelchair used by persons who cannot move freely, such as an injured person, a sick person, or a physically handicapped person, has, for example, a structure in which wheels and auxiliary wheels are attached to a frame and a seat portion is provided in the frame. Are known.

[0003] In the above-mentioned wheelchair, it is best to determine the height of the seat portion and the position of the center of gravity in accordance with the physique and state of the user. Therefore, the main shaft that rotatably supports the wheels,
2. Description of the Related Art A wheelchair has been proposed which is attached to a frame so as to be adjustable in a vertical direction and a front-rear direction.

For example, as shown in Japanese Patent No. 2530262, a plurality of holes for fixing plates are formed in a frame at intervals in the vertical direction so that the mounting position of the fixing plate can be adjusted in the vertical direction. A wheelchair has been proposed in which a washer is mounted along a long hole of a plate so as to be adjustable in the front-rear direction, and a main shaft is mounted on the washer.

[0005]

In such a wheelchair, the weight of the user acting on the frame is transmitted to the wheels via the fixing plate, the washer and the main shaft, so that the connecting portion between the frame and the fixing plate, the fixing plate and the washer. The wheel may slightly move with respect to the frame due to backlash of the connecting portion of the axle and the connecting portion between the washer and the axle, which may give the user an uneasy feeling.

Further, since the seat portion is integrally provided on the frame, there is no problem when a person sits on the seat portion and runs by rotating wheels by hand, or when another person pushes and runs. When a person sitting on a seat part cuts the floor with his / her feet and travels for rehabilitation or the like, it may be difficult to hit the floor with his / her feet.

Accordingly, an object of the present invention is to provide a wheelchair capable of solving the above-mentioned problems.

[0008]

According to a first aspect of the present invention, there is provided a main frame 6 in which left and right main pipes 3 are connected by a horizontal pipe, and a rear pipe of each of the main pipes 3 having a vertical pipe through a vertical pipe. A main frame 1 is formed by an auxiliary frame 7 in which a short auxiliary pipe 10 is fixed substantially parallel to the main pipe 3. A seat section frame 2 is attached to the main frame 1 to form a seat. The one-side vertical plate 80 and the other-side vertical plate 81 are attached to each other by tightening bolts 88 to hold the main pipe 3 and the auxiliary pipe 10 so as to form the wheel mounting member 14. The wheel 15 is inserted into any one of the plurality of wheel mounting holes 84 spaced apart.
A wheelchair, wherein the main shaft 90 is detachably fitted and mounted.

According to a second aspect of the present invention, in the first aspect, concave portions 83 and 82 are formed on the lower edge and the upper edge of the one-side vertical plate 80 so as to be fitted to the left and right sides of the main pipe 3 and the auxiliary pipe 10. The lower and upper edges of the other vertical plate 81 are formed with concave portions 86 and 85 fitted to the left and right side surfaces of the main pipe 3 and the auxiliary pipe 10, respectively.
The main pipe 3 is held between the concave portion 83 of the one vertical plate 80 and the concave portion 86 of the other vertical plate 81, and the concave portion 82 of the one vertical plate 80 and the concave portion 85 of the other vertical plate 81 are assisted. This is a wheelchair that holds the pipe 10.

According to a third aspect of the present invention, in the first aspect, the bracket 12 is fixed to the auxiliary pipe 10 upward, and the bracket 12 is attached to the seat frame 20 of the seat frame 2.
This is a wheelchair in which a main pipe 21 forming a circle is vertically swingably mounted.

[0011]

According to the first aspect, the bolt 88 is slightly loosened so that the one-side vertical plate 80 and the other-side vertical plate 81 are connected to the main pipe 3.
It can move back and forth along the auxiliary pipe 10 and the wheels 15
The main shaft 90 can be inserted and mounted in any one of the plurality of wheel mounting holes 84. Thus, the mounting position of the wheel 15 in the front-rear direction can be adjusted steplessly, and the mounting height of the wheel 15 can be adjusted stepwise.

The weight of the user acting on the main body frame 1 is determined by the main pipe 3, the auxiliary pipe 10, and the wheel mounting member 1.
4, transmitted to the wheel 15 via the wheel mounting hole 84 and the main shaft 90, but the one vertical plate 80 and the other vertical plate 81 forming the wheel mounting member 14 hold the main pipe 3 and the auxiliary pipe 10 therebetween. Since it is mounted, no rattling occurs at the mounting portion of the wheel mounting member 14 and no rattling occurs because the main shaft 90 is fitted in the wheel mounting hole 84. Thus, the wheel 15 does not slightly move with respect to the main body frame 1, and the user does not feel uneasy.

According to the second invention, the auxiliary pipe 1 is formed by the concave portions 82, 85, 83, 86 of the one vertical plate 80 and the other vertical plate 81.
0, since the left and right sides of the main pipe 3 are sandwiched, it can be firmly attached, and can be smoothly moved along the auxiliary pipe 10 and the main pipe 3 by loosening the bolt 88 slightly.

According to the third invention, the auxiliary pipe 10 shorter than the main pipe 3 is fixed to the rear portion of the main pipe 3 of the main body frame 1 via the vertical pipe, and the auxiliary pipe 10 and the main pipe 3 are attached to the auxiliary pipe 10. Bracket 12 attached to the auxiliary pipe 10 by mounting the wheel mounting member 14 thereover.
The main frame 3, the auxiliary pipe 10, and the main pipe 21 are located at the same position in the left-right direction, so that the mounting member 14 can be firmly mounted on the main body frame 1 at two upper and lower locations. Then, the left and right dimensions of the frame are reduced so that the seat frame 2 can swing up and down without interfering with the main body frame 1.

This makes it possible to adjust the mounting height of the wheels and the mounting position in the front-rear direction, to reduce the left-right dimensions, and to swing the seat up and down so that a person sitting on the seat can smoothly lift the floor with his feet. It becomes possible to make it a wheelchair that can run.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1, 2 and 3,
The main frame 1 and the seat frame 2 form a frame. As shown in FIG. 4, the main body frame 1 includes a main frame 6 in which a pair of left and right main pipes 3 and 3 are connected in parallel by a front horizontal pipe 4 and a rear horizontal pipe 5, and an auxiliary frame 7. The auxiliary frame 7 includes a pair of left and right front vertical pipes 8 and rear vertical pipes 9 fixed to the rear portion of each main pipe 3, and an auxiliary pipe 10 fixed between each front vertical pipe 8 and the rear vertical pipe 9. And an auxiliary horizontal pipe 11 fixed between the left and right auxiliary pipes 10. The main pipe 3 and the auxiliary pipe 10 face in the front-back direction and are parallel.
The auxiliary pipe 10 is shorter than the main pipe 3.

A bracket 12 is fixed upward to a rear portion of each auxiliary pipe 10. A rectangular leg-mounting pipe 1 is located near the left and right sides of the rear horizontal pipe 5.
3 are fixed diagonally downward. Each of the pipes is circular.

A wheel mounting member 14 is attached to each of the main pipes 3 and each of the auxiliary pipes 10, and a wheel 15 is mounted to each of the wheel mounting members 14. A leg 16a having a front auxiliary wheel 16 is mounted near the front of each of the main pipes 3. A leg 17a having a rear auxiliary wheel 17 is inserted into each of the leg mounting pipes 13 and is fixed by a lock pin 18.

The seat frame 2 includes a seat frame 20 forming a seat and a back frame 30 forming a back (back portion). The seat frame 20 is shown in FIG.
As shown in FIG. 3, a pair of left and right main pipes 21 are connected in parallel by a front horizontal pipe 22, an intermediate horizontal pipe 23, and a rear horizontal pipe 24, and the front horizontal pipe 22 and the intermediate horizontal pipe 23 are connected.
Is bent substantially in a downward U-shape. Bracket 25 is attached to main pipe 21 at the center in the left-right direction of front horizontal pipe 22.
It is projected downward and fixed.

Each of the main pipes 21 is bent into a substantially U-shape at a front vertical portion 21a and a rear horizontal portion 21b, and a footrest 26 is provided below the front vertical portion 21a as shown in FIG. Installed. The footrest 26 is movable between a horizontal position and a vertical position.

The back frame 30 is formed by connecting a pair of left and right vertical pipes 31 with upper and lower horizontal pipes 32 and 33 in a substantially U-shape in plan view. It is mounted swingably. An auxiliary vertical pipe 35 is detachably mounted on the upper part of the vertical pipe 31.

For example, as shown in FIG. 6, a screw hole 31a is formed in the upper part of the vertical pipe 31, a screw part 35a is provided in the lower part of the auxiliary vertical pipe 35, and the screw part 35a is screwed into the screw hole 31a for mounting. It is.

As described above, if the auxiliary vertical pipe 35 is attached, the height of the back frame 30 is increased, so that the person sitting on the seat has a stable posture. Further, since the back frame 30 is lowered by removing the auxiliary vertical pipe 35, the back frame 30 (back) does not become an obstacle when a person sitting on the seat moves, which is preferable when actively using a wheelchair.

A manual pushing frame 36 is detachably attached to the main body frame 1. Specifically, a pair of upper and lower connecting pipes 37 is fixed to the lower part of the hand pushing frame 36, and the connecting pipes 37 are connected to the main pipe 3 and the auxiliary pipe 1.
0 and fixed with pins 38.

As shown in FIGS. 7, 8 and 9, the rear pipes of the main frame 21 of the seat frame 20 and the lower pipes of the vertical pipes 31 of the back frame 30 are connected to the auxiliary pipes 10 of the main body frame 1. The brackets 12 are connected to the fixed brackets 12 so as to swing up and down and swing back and forth to form a frame of a wheelchair. As shown in FIG. 1, a seat 27 is attached to a pair of left and right main pipes 21 to form a seat, and a seat 39 is attached to a pair of left and right vertical pipes 31 to form a back. In addition, the seat 27 is the upper horizontal pipe 32
It is extended and installed.

Next, the connection structure described above will be described. As shown in FIG. 10, holes 40 are respectively formed in the bracket 12, the main pipe 21, and the vertical pipe 31, and arcuate concave surfaces 41 a of the slider 41 are formed on both side surfaces of the main pipe 21 and the vertical pipe 31. Are provided in contact with each other, a bolt 42 is inserted into each hole 40 and a hole 41b of each slider 41 and a nut 43 is screwed into the bracket 12, the main pipe 21, and the vertical pipe 31.
Are tightened and connected via a flat surface 41c of the slider 41. The slider 41 is made of a material having a low sliding resistance, such as a resin.

As described above, the main pipe 21 slides smoothly on the bracket 12 via the slider 41, and the main pipe 21 and the vertical pipe 31
Sliding each other smoothly through each other, the vertical pipe 3
1 smoothly slides on the nut 43 via the slider 41. Accordingly, the main pipe 21 swings up and down smoothly with respect to the vertical pipe 31 and the bracket 12, and the vertical pipe 31 swings back and forth smoothly with respect to the main pipe 21 and the nut 43. In addition, the bracket 12, the main pipe 21, and the vertical pipe 31 can be connected to the left and right without rattling by strongly tightening the bolt 42 and the nut 43.

Also, the auxiliary pipe 10 is shorter than the main pipe 3 and is located near the rear, and the bracket 12 protrudes above the auxiliary pipe 10, so that the main pipe 3 and the auxiliary pipe 10 can be moved in the left-right direction. At the same position, the pair of main pipes 21 of the seat frame 20 can reduce the horizontal dimension of the frame at the same position as the auxiliary pipe 10 in the left and right direction.
Does not interfere with the auxiliary pipe 10.

A first telescoping mechanism 50 is connected to the left and right central portions of the main body frame 1 and the left and right central portions of the seat frame 20. When the first telescoping mechanism 50 is extended and operated, the seat frame 20 is extended. When the seat frame 20 swings upward and contracts, the seat frame 20 swings downward.

As shown in FIG. 11, the first telescopic mechanism 50 has a piston rod 52 fitted to a cylinder tube 51 so as to be extendable and retractable, and is urged in the direction of extension by gas pressure. The cylinder tube 51 is vertically connected to the bracket 25 by a pin 54 so as to be swingable up and down.
Is connected to a bracket 55 fixed to the center in the left-right direction of the front horizontal pipe 4 so as to be vertically swingable. This bracket 55 is formed in a U-shape with a pair of vertical rods 55a and a horizontal rod 55b, and the pair of vertical rods 55a is inserted into the front horizontal pipe 4 as shown in FIG. The horizontal rod 55
The piston rod 52 is connected to b.

As described above, when the lever 53 is manually released by a person to release the lock, the piston rod 52 is released.
And the seat frame 20 swings upward with respect to the main body frame 1 around the bolt 42, and when a person sits on the seat, the piston rod 52 shrinks and swings downward with the weight. . At this time, the back frame 30 works together with the seat frame 20 while maintaining a certain angle. Then, when a person releases the lock lever 53, the piston rod 52 is locked.

Therefore, the seat frame 20 can be swung up and down by operating one of the first telescopic mechanisms 50 provided at the left and right central portions of the seat frame 20, and the operation is easy.

The seat frame 20 and the back frame 30
The second telescopic mechanism 60 is connected to the
When the telescopic mechanism 60 is extended, the back frame 30 swings toward the front, and when contracted, the back frame 30 swings toward the rear.

As shown in FIG. 11, the second expansion / contraction mechanism 60 includes a joint nut 61, a turnbuckle 64 comprising a first screw rod 62 and a second screw rod 63, and a first connecting member fixed to the first screw rod 62. 65 and a second connecting member 66 fixed to the second screw rod 63. The first connector 65 has a shape in which a plate 68 is bolted to a substantially U-shaped main body 67 fitted to the longitudinal center portion of the intermediate horizontal pipe 23, and the main body 67 is attached to the intermediate horizontal pipe 23 from above. The plate 68 is fitted, bolted to the plate 68, abuts against the lower surface of the intermediate horizontal pipe 23, and is connected to the longitudinal center of the intermediate horizontal pipe 23 so as to be vertically swingable.

The second connecting member 66 has a substantially U-shaped main body 69 fitted into the lower horizontal pipe 33 of the back frame 30 from below.
And a lock mechanism 70. The lock mechanism 70 is a main body 69
A lock pin 71 provided to freely enter and exit the
And pressed against the upper surface of the lower horizontal pipe 33.

Because of this, the joint nut 6
1 is rotated in one direction to extend and operate the back frame 30.
Swings around the bolt 42 toward the front, and when the joint nut 61 is rotated in the other direction, it contracts and the back frame 30 swings toward the rear.

Further, the lock pin 71 is pulled against the spring 72 so as to be separated from the upper surface of the lower horizontal pipe 33, whereby the second connecting member 66 is separated from the lower horizontal pipe 33, and the back frame 30 is centered on the bolt 42. By swinging forward, a horizontal posture overlapping the seat portion 20 can be achieved.

Further, since the distal end of the lock pin 71 is tapered, the second connecting member 66 is swung upward to come into contact with the lower surface of the lower horizontal pipe 33 so as to be pulled in against the spring 72. Therefore, the second connecting member 66 can be easily connected to the lower horizontal pipe 33 so that the back frame 30 can be in the vertical posture.

Accordingly, the back frame 30 can be easily swung between the horizontal position and the vertical position, so that the wheelchair can be easily compacted when put on a car or the like, and can be easily put down from the car or the like to be used. Can be.
In this case, the pushing frame 36 can be easily attached and detached.

As shown in FIG. 13, the wheel mounting member 14 includes a vertical plate 80 on one side and a vertical plate 81 on the other side.
The upper edge has an arc-shaped concave portion 82, the lower edge has a semicircular concave portion 83, and a plurality of wheel mounting holes 8
4 are provided at intervals in the vertical direction. Other vertical plate 81
The upper edge has an arc-shaped concave portion 85, the lower edge has a semicircular concave portion 86, and the upper and lower middle portions have an opening 87.

A concave portion 82 and a concave portion 83 of a one-sided vertical plate 80 are provided on the left and right side surfaces of the auxiliary pipe 10 and the main pipe 3 of the main body frame 1.
And the recesses 85 and 86 of the other vertical plate 81 are fitted into the left and right side surfaces, respectively, and the bolts 88 are tightened from the one vertical plate 80 to the other vertical plate 81 to make the auxiliary pipe 10,
The main pipe 3 is held by holding it.

As shown in FIG. 9, a main shaft 90 is removably inserted into the one wheel mounting hole 84. That is, the hollow shaft 91 with a slit is inserted, and the support shaft 92 of the wheel 15 is inserted into the hollow shaft 91 as the main shaft 90.
The hollow shaft 91 is deformed by tightening a nut 93 to the hollow shaft 91 and is pressed against the support shaft 92. 94 is a retaining pin.

As described above, the retaining pin 94 is pulled out, and the nut 93 is slightly loosened, so that the hollow shaft 91 is removed.
By pulling the support shaft 92 out of the wheel mounting hole 84 and inserting it into the other wheel mounting hole 84 to tighten the nut 93 and inserting the retaining pin 94, the mounting height of the wheel 15 can be adjusted in three stages. .

Further, by loosening the bolt 88, the one-side vertical plate 80 and the other-side vertical plate 81 can be slid back and forth along the main pipe 3 and the auxiliary pipe 10, so that the position of the wheel 15 in the front-rear direction is zero. Can be adjusted in stages.

Further, the concave portion 82 of the one vertical plate 80 and the concave portion 85 of the other vertical plate 81 are fitted on the left and right side surfaces of the auxiliary pipe 10, and the concave portion 83 of the one vertical plate 80 and the other vertical plate 81 are formed. Recess 86
Are fitted on the left and right side surfaces of the main pipe 3, so that the bolt 88 is slightly loosened so that the one-side vertical plate 80, the other-side vertical plate 81,
That is, the wheel mounting member 14 is connected to the auxiliary pipe 10, the main pipe 3
You can move back and forth smoothly along.

[0046]

According to the first aspect of the present invention, the bolt 8
By slightly loosening 8, the one-side vertical plate 80 and the other-side vertical plate 81 can be moved back and forth along the main pipe 3 and the auxiliary pipe 10, and the main shaft 90 of the wheel 15 can be moved to any one of the plurality of wheel mounting holes 84. One can be inserted and installed. Thus, the mounting position of the wheel 15 in the front-rear direction can be adjusted steplessly, and the mounting height of the wheel 15 can be adjusted stepwise.

The weight and the like of the user acting on the main body frame 1 are determined by the main pipe 3, the auxiliary pipe 10, and the wheel mounting member 1.
4, transmitted to the wheel 15 via the wheel mounting hole 84 and the main shaft 90, but the one vertical plate 80 and the other vertical plate 81 forming the wheel mounting member 14 hold the main pipe 3 and the auxiliary pipe 10 therebetween. Since it is mounted, no rattling occurs at the mounting portion of the wheel mounting member 14 and no rattling occurs because the main shaft 90 is fitted in the wheel mounting hole 84. Thus, the wheel 15 does not slightly move with respect to the main body frame 1, and the user does not feel uneasy.

According to the second aspect of the present invention, the one-side vertical plate 8
0, since the left and right side surfaces of the auxiliary pipe 10 and the main pipe 3 are held by the concave portions 82, 85, 83, 86 of the other vertical plate 81, the auxiliary pipe 10 and the main pipe 3 can be firmly attached. It can move smoothly along the pipe 10 and the main pipe 3.

According to the third aspect of the present invention, the auxiliary pipe 10 shorter than the main pipe 3 is fixed to the main pipe 3 near the rear portion of the main pipe 3 via the vertical pipe. 3 wheel mounting member 14
And the seat frame 2 is attached to the bracket 12 fixed upwardly to the auxiliary pipe 10 so as to be able to swing up and down, and the main pipe 3, the auxiliary pipe 10, and the main pipe 21 are at the same position in the left-right direction. Can be firmly attached to the main body frame 1 at two upper and lower positions, and the left and right dimensions of the frame can be reduced so that the seat frame 2
Can swing up and down without interference.

This makes it possible to adjust the mounting height of the wheels and the mounting position in the front-rear direction, to reduce the left-right dimensions, and to swing the seat up and down so that the person sitting on the seat can smoothly lift the floor with his feet. It becomes possible to make it a wheelchair that can run.

[Brief description of the drawings]

FIG. 1 is a side view of a wheelchair.

FIG. 2 is a plan view of a wheelchair.

FIG. 3 is a rear view of a wheelchair.

FIG. 4 is a perspective view of a main body frame.

FIG. 5 is a perspective view of a seat frame.

FIG. 6 is an enlarged side view of the upper portion of the back frame.

FIG. 7 is an enlarged side view of a seat frame, a back frame, and a main body frame connecting portion.

8 is a left and right side plan view of FIG. 7;

FIG. 9 is an enlarged sectional view of a wheel mounting portion.

FIG. 10 is an exploded perspective view of a connecting portion between a bracket, a main pipe, and a vertical pipe.

FIG. 11 is a sectional view taken along line AA of FIG. 8;

FIG. 12 is a view as viewed from B in FIG. 11;

FIG. 13 is an exploded perspective view of a wheel mounting member.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Body frame, 2 ... Seat part frame, 3 ... Main pipe, 6 ... Main frame, 7 ... Auxiliary frame, 10 ... Auxiliary pipe, 12 ... Bracket, 14 ... Wheel mounting member, 15 ...
Wheels, 16: Front auxiliary wheels, 17: Rear auxiliary wheels, 20
... Seat frame, 21 ... Main pipe, 27 ... Seat, 30
... back frame, 31 ... vertical pipe, 34 ... armrest, 35
... Auxiliary vertical pipe, 36 ... Frame for manual pushing, 39 ... Sheet, 40 ... Hole, 41 ... Slider, 42 ... Bolt, 43 ... Nut, 50 ... First telescopic mechanism, 60 ... Second telescopic mechanism, 61
... joint nut, 62 ... first screw rod, 63 ... second screw rod, 64 ... turnbuckle, 65 ... first coupling tool, 66
... Second connector, 69 ... Main body, 71 ... Lock pin, 72 ...
Spring, 80 ... One side vertical plate, 81 ... Other side vertical plate, 82 ...
Recess, 83 ... recess, 84 ... wheel mounting hole, 85 ... recess, 8
6 recess, 87 opening, 88 bolt, 90 spindle
91: hollow shaft, 92: support shaft, 93: nut, 94: retaining pin

Claims (3)

[Claims] 1. A main frame 6 in which left and right main pipes 3 are connected by a horizontal pipe, and an auxiliary pipe 1 shorter than the main pipe 3 via a vertical pipe near a rear portion of each main pipe 3.
Reference numeral 0 is a main body frame 1 with an auxiliary frame 7 fixed substantially parallel to the main pipe 3, and a seat part frame 2 is attached to the main body frame 1 to form a seat. Board 80
And the other vertical plate 81 are tightened by bolts 88 to hold the main pipe 3 and the auxiliary pipe 10 so as to form a wheel mounting member 14. A wheelchair, wherein the main shaft 90 of the wheel 15 is detachably fitted and attached to any one of the wheel mounting holes 84. 2. On the lower edge and the upper edge of the one-side vertical plate 80, recesses 83 and 82 are formed to be fitted to the left and right side surfaces of the main pipe 3 and the auxiliary pipe 10, respectively. At the edge and the upper edge, recesses 86 and 85 are formed to be fitted to the other left and right sides of the main pipe 3 and the auxiliary pipe 10, and the recesses 83 of the one-sided vertical plate 80 are formed.
And the concave portion 86 of the other vertical plate 81 sandwiches the main pipe 3, the concave portion 82 of the one vertical plate 80 and the concave portion 85 of the other vertical plate 81.
The wheelchair according to claim 1, wherein the auxiliary pipe (10) is nipped by (5). 3. A bracket 12 is fixed to the auxiliary pipe 10 in an upward direction.
The wheelchair according to claim 1, wherein the main pipe (21) forming the seat frame (20) is vertically swingably mounted.