JP3533628B2 - wheelchair - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair. 2. Description of the Related Art A wheelchair used by a person who cannot move freely, such as an injured person, a sick person, a physically handicapped person, for example, is provided with wheels and auxiliary wheels mounted on a frame and a seat portion provided on the frame. Are known. In the above-mentioned wheelchair, it is best to determine the height of the seat and the position of the center of gravity in accordance with the physique and the state of the body of the user. Therefore, the main shaft that rotatably supports the wheels,
2. Description of the Related Art A wheelchair that is attached to a frame so as to be adjustable in a vertical direction and a front-rear direction has been proposed. For example, as shown in Japanese Patent No. 2530262, a plurality of fixing plate mounting holes 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 so as to be adjustable in the front-rear direction along a long hole of a plate, and a main shaft is mounted on the washer. In such a wheelchair, the weight and the like of the user acting on the frame are transmitted to the wheels via the fixing plate, the washer and the main shaft. Wheels may slightly move with respect to the frame due to play at the connecting portion between the plate and the washer, or at the connecting portion between the washer and the axle. In addition, since the seat portion is provided integrally with the frame, there is no problem when a person sits on the seat portion and runs by rotating the wheels by hand or running by pushing another person. When a person sitting on the 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. According to the present invention, a main frame 6 in which left and right main pipes 3 are connected by a horizontal pipe, and an auxiliary pipe 10 via a vertical pipe near a rear portion of each main pipe 3 are provided. Auxiliary frame 7 fixed substantially parallel to main pipe 3
In the body frame 1, a seat portion mounted to the seat portion frame 2 to the body frame 1, a main pipe 3 of the left
Left auxiliary pipe 10, right main pipe 3, and right auxiliary pie
The main side pipe 3 and the auxiliary side pipe 10 are clamped by tightening the bolt 88 to the one-side vertical plate 80 and the other-side vertical plate 81 across the loop 10 to attach the left and right wheel mounting members 14, respectively .
The mounting spindle 90 of a plurality of any one on the wheel 15 of the wheel mounting holes 84 spaced vertically spacing each one side vertical plate 80 detachably by fitted respectively, wherein each single-side vertical plates 80
On the lower and upper edges of the main pipe 3 and the auxiliary pipe 10
Concave portions 83 and 82 are formed on right side
A main pipe is provided at the lower edge and the upper edge of each of the other vertical plates 81.
3 and recess 8 fitted to the other left and right sides of auxiliary pipe 10
6 and 85, respectively, and a concave portion 83 of one side vertical plate 80 is formed.
When the main pipe 3 is held by the concave portion 86 of the other vertical plate 81,
A concave portion 82 of one vertical plate 80 and a concave portion 85 of the other vertical plate 81
Characterized in that the auxiliary pipe 10 is held by
Wheelchair. According to the present invention , the one-side vertical plate 80 and the other-side vertical plate 81 are moved back and forth along the main pipe 3 and the auxiliary pipe 10 by slightly loosening the bolt 88. It can move, and can be attached by inserting the main shaft 90 of the wheel 15 into 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 into 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. Further, since the left and right sides of each auxiliary pipe 10 and each main pipe 3 are held by the concave portions 82, 85, 83, 86 of each one-side vertical plate 80 and each other-side vertical plate 81, respectively . 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. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1, 2 and 3,
The body 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, 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 upwardly to a rear portion of each auxiliary pipe 10. A rectangular leg-mounting pipe 1 is provided 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 provided with a front auxiliary wheel 16 is mounted near the front of each main pipe 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 (backrest). The seat frame 20 is shown in FIG.
As shown in FIG. 2, 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 U-shaped downward. 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 an upper horizontal pipe 32 and a lower horizontal pipe 33 having 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 a 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 wheelchair frame. As shown in FIG. 1, a seat 27 is attached to a pair of left and right main pipes 21 to form a seat portion, and a seat 39 is attached to a pair of left and right vertical pipes 31 to form a back portion. In addition, the seat 27 is an upper horizontal pipe 32.
It is extended and installed. Next, the above-described connection structure 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 sides of the main pipe 21 and both sides of 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 smoothly slides 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. Therefore, 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. Further, 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 be reduced in the horizontal direction at the same position as the auxiliary pipe 10 in the horizontal direction.
Does not interfere with the auxiliary pipe 10. A first telescoping mechanism 50 is connected between 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, the seat frame 20 is moved. 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 connected to the bracket 25 by a pin 54 so as to be swingable up and down.
Are 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. The 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 operated 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 contracts and swings downward by weight with the weight. . At this time, the back frame 30 works together with the seat frame 20 while maintaining a certain angle. Then, when the 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 telescoping 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 extension 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 telescopic mechanism 60 includes a joint nut 61, a turnbuckle 64 including 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 connecting member 65 has a shape in which a plate 68 is bolted to a substantially U-shaped main body 67 fitted to a 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 middle horizontal pipe 23, and is connected to the middle of the middle horizontal pipe 23 in the longitudinal direction 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, by pulling the lock pin 71 against the spring 72 to separate it from the upper surface of the lower horizontal pipe 33, 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 tip 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, thereby performing a pull-in operation against the spring 72. Therefore, the second connecting member 66 can be easily connected to the lower horizontal pipe 33, and the back frame 30 can be set in the vertical posture. Therefore, since the back frame 30 can be easily swung between the horizontal position and the vertical position, the wheelchair can be easily made compact when the wheelchair is put on a car or the like, and can be easily put down from the car or the like and put into a use state. Can be.
In this case, the hand 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
Has an arc-shaped concave portion 85 at the upper edge, a semicircular concave portion 86 at the lower edge, and an opening 87 at the upper and lower middle portions. A concave portion 82 and a concave portion 83 of one side vertical plate 80 are provided on one side of the left and right sides 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 respectively fitted to the left and right other side surfaces, 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 detachably inserted into the one wheel mounting hole 84. That is, the hollow shaft 91 with the slit is inserted, and the support shaft 92 of the wheel 15 is inserted into the hollow shaft 91 to serve 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 out the support shaft 92 from 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 not changed. 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 to 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 Recess 86
Are fitted to the left and right side surfaces of the main pipe 3, so that the bolt 88 is slightly loosened to make 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. 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 measured 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, 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 into 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. Also, since the left and right sides of each auxiliary pipe 10 and each main pipe 3 are held by the concave portions 82, 85, 83, 86 of each one-side vertical plate 80 and each other-side vertical plate 81, respectively . 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. [0050]

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 the 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 body frame connecting portion. FIG. 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. [Description of Signs] 1 ... body frame, 2 ... seat 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 hand 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 ...
Recessed part, 83 ... concave part, 84 ... wheel mounting hole, 85 ... concave part, 8
6 recess, 87 opening, 88 bolt, 90 spindle
91: hollow shaft, 92: support shaft, 93: nut, 94: retaining pin

Claims (1)

(57) [Claims 1] A main frame 6 in which left and right main pipes 3 are connected by a horizontal pipe, and an auxiliary pipe 10 is connected to a main pipe 3 via a vertical pipe near a rear portion of each main pipe 3. The main frame 1 is formed by an auxiliary frame 7 fixed substantially in parallel with the main frame 3, and the seat frame 2 is attached to the main frame 1 to form a seat. The left main pipe 3, the left auxiliary pipe 10 and the right main
The one-side vertical plate 80 and the other-side vertical plate 81 are attached across the Ip 3 and the right auxiliary pipe 10 by tightening bolts 88 to hold the main pipe 3 and the auxiliary pipe 10 and attach them respectively. > the wheel mounting member 14, mounted respectively fitted to the main shaft 90 of the wheel 15 detachably to any one of the plurality of wheel mounting holes 84 vertically spaced of each one side vertical plates 80, The main pipe 3 is attached to the lower edge and the upper edge of each one side vertical plate 80.
Recesses 83, 8 fitted on one side of the left and right sides of the auxiliary pipe 10.
2 are formed respectively, and the lower edge portion and the upper
Fit to the left and right sides of main pipe 3 and auxiliary pipe 10
Concave recesses 86 and 85 are formed respectively, and one side vertical plate 8 is formed.
The main pipe 3 is formed by the concave portion 83 of the first vertical plate 81 and the concave portion 86 of the vertical plate 81 on the other side.
While holding, the concave portion 82 of one side vertical plate 80 and the other side vertical plate 8
1 to hold the auxiliary pipe 10 in the recess 85.
And a wheelchair.