JP4284603B2 - Unit type wheelchair - Google Patents

Description

  The present invention relates to a unit type wheelchair capable of adjusting a caster angle, a front-rear direction and a height of a main wheel, a seat width and the like according to a physique of a seated person and a disease state.

  People who use wheelchairs are not certain in physique and medical condition, and it is economically difficult to create a wheelchair suitable for the user. Therefore, a wheelchair that can be easily adjusted according to the physique and medical condition of a user with an existing wheelchair has been devised. For example, the conventional method related to the adjustment of the height and front / rear of the main wheel is disclosed in Patent Document 1 from the sixth column on the right column of the second page. The two narrowing plates facing in the direction are circumscribed, and the clamping plate can be moved up and down and fixed to the vertical rod by tightening the bolt through which the narrowing plate is inserted, and fixed to the front and rear ends of the clamping plate. By providing two or more through holes, and inserting the axle of the wheel into this through hole, the axle position can be adjusted up and down and back and forth with respect to the vertical rod. An adjustable wheelchair is disclosed. In this method of adjusting the height and front / rear of the wheel of Patent Document 1, the vertical movement of the holding plate attached to the vertical rod and the axle is moved to the plurality of through holes provided in the holding plate, thereby moving the wheel. It is a method to move back and forth.

  The adjustment method of Patent Document 2 is described in Patent Document 2, page 3 ([0013]), line 5, "The rear pipe and the joint pipe have a large number of fixing holes for attaching the wheel fixing plates. As shown in FIG. 4, the wheel fixing plate of the paragraph ([0014]) is formed with a long hole horizontally for fitting and fixing the axle at a substantially central portion thereof, A plurality of grooves corresponding to the upper and lower positions are formed in the upper edge portion and the lower edge portion.This wheel fixing plate is fixed to the fixing hole by passing a fixing screw through the mounting hole. From the fourth line of the paragraph ([0039]), “fix the main wheel to the wheel fixing plate. At this time, the mounting position of the wheel fixing plate to the fixing hole and the engagement with the groove of the washer with projection” The position fine-tunes the wheelchair seat height and angle adjustment. " That. The method of adjusting the height of the wheel in Patent Document 2 is adjusted by moving the wheel fixing plate up and down through a number of fixing holes formed in the side surfaces of the rear pipe and the joint pipe. The adjustment method in the front-rear direction of the wheel is to adjust the front-rear position of the wheel by using a washer with a protrusion in a plurality of grooves corresponding to the upper and lower portions of the upper and lower edges formed on the wheel fixing plate. .

In the wheel adjustment method of Patent Document 1, two holding plates must be held by a vertical rod and tightened with bolts, and the bolts are tightened by hand so that the holding plates do not fall. It was not easy to adjust. Further, the adjustment of the wheel in the front-rear direction of Patent Document 2 requires that the washer with a projection be engaged with the upper and lower grooves of the wheel fixing plate, and there is a problem that it is difficult for an unaccustomed person to install. For this reason, the appearance of a wheelchair in which the width of the wheelchair and the position of the wheel can be adjusted more easily has been desired.
Japanese Patent Laid-Open No. 51-129053 Japanese Patent Registration No. 2620737

  The present invention has been made in view of the above-mentioned facts, and adjusts the width of the wheelchair and the position of the main wheel according to the physique and medical condition of the wheelchair user, and changes the large diameter main wheel to the small diameter main wheel. Thus, a wheelchair that can be changed from a self-propelled wheelchair to a nursing wheelchair and that can easily adjust the angle of the caster is provided.

  In order to provide a robust wheelchair that can easily change the position of the wheelchair's main wheel and the width of the wheelchair according to the physique and medical condition of the wheelchair user, intensive studies were repeated. As a result, we devised structural brackets such as a crossbar bracket for adjusting the width of the wheelchair, an adjustable plate for adjusting the position of the main wheel, and a back plate for adjusting the backrest angle. The above-mentioned problem was solved by installing the device.

  The first solving means of the present invention includes a back plate capable of adjusting a backrest angle between a back frame having a grip portion at a rear portion and a rear frame having an armrest support frame attached thereto, and a front vertical frame. A caster bracket that can adjust the angle of the caster by fitting a movable caster, and an adjustable plate that can adjust the position of the main wheel by attaching the main wheel between the rear frame and the rear vertical frame. And a crossbar bracket in which one end of the crossbar is pivotally attached to the left and right seat frames, and the other end of the crossbar is pivotally attached to adjust the width of the seat frame. It is a unit type wheelchair.

  The unit type wheelchair of the present invention includes a left and right seat frame to which a seat is attached, a back frame to which a back is attached, a grip portion at the rear of the back frame, and a back between the back frame and the back frame. Plate. The angle of the backrest can be adjusted by changing the position of the screw to be screwed into the screw hole formed in the back plate, and the backrest angle can be adjusted according to the occupant's disease. Further, an armrest support frame pivotally attached to the upper portion of the rear frame and a rotatable caster attached to the front vertical frame are attached to a caster bracket capable of adjusting the angle. When the position of the main wheel is adjusted, the height of the wheelchair can be adjusted by adjusting the angle of the caster with the caster bracket. The main wheel, which is pivotally attached to an adjustable plate that is screwed between the rear frame and the rear vertical frame, can adjust the position of the main wheel in the vertical direction by changing the screwing position of the adjustable plate. The position of the main wheel can be changed back and forth by attaching the main wheel to an appropriate position of the plurality of shaft holes drilled in. Furthermore, it is possible to change from a self-propelled wheelchair to a nursing wheelchair by pivotally attaching a small-diameter main wheel to an adjustable plate. One end of the crossbar is engaged with the crossbar shaft mounting portion having the engagement portion of the crossbar having a substantially oval cross section at both ends of the frame having a substantially semicircular cross section, and the other end of the crossbar is the left and right seats. It is pivotally attached to the part frame. By adjusting the angle of the crossbar bracket, the seat width can be adjusted according to the physique and posture of the occupant.

  The second solving means of the present invention is the unit type wheelchair according to claim 1, characterized in that the height of the armrest fitted to the armrest support frame can be adjusted. The height of the armrest can be adjusted to a position where it does not get tired even if the user sits for a long time according to the disease state of the seated person. In addition, when the wheelchair of the present invention is permanently placed in a hospital or the like, even when the patient using the wheelchair changes, it can be easily adjusted according to the patient.

  3. The unit-type wheelchair according to claim 1, wherein the third solving means of the present invention is capable of adjusting the height of the gripping part attached to the rear part of the backrest frame. is there. When the main wheel is changed to a small-diameter wheel and is used for nursing care, when the position of the gripping portion is too low, it can be adjusted to a position that is easy to grip according to the height of the caregiver.

  According to a fourth solution of the present invention, in a wheelchair capable of adjusting the seating width of the wheelchair by changing the angle of the crossbar, a locking tool and a bolt with a pin are used to fix the angle of the crossbar. The unit type wheelchair according to any one of claims 1 to 3, wherein the unit type wheelchair is provided. When the seat width is changed by adjusting the angle of the crossbar, the seat width of the wheelchair can be easily adjusted by using a locking tool and a bolt with a pin that are easy to remove and easy to install.

  The unit type wheelchair of the present invention has a back plate between the rear frame and the back frame, and adjusts the angle of the back by changing the position of the screw screwed into the screw hole drilled in the back plate. The backrest angle can be adjusted according to the disease state of the occupant.

  By attaching a caster bracket with adjustable angle to a pivotable caster attached to the front vertical frame, when the position of the main wheel is adjusted, the angle of the caster is adjusted to The height can be adjusted appropriately.

  The main wheel, which is pivotally attached to the adjustable plate screwed between the rear frame and the rear vertical frame, can adjust the position of the main wheel in the vertical direction by changing the screwing position of the adjustable plate. The position of the main wheel can be changed back and forth by attaching the main wheel to an appropriate position of a plurality of shaft holes drilled in the adjustable plate. Furthermore, it is possible to change from a self-propelled wheelchair to a nursing wheelchair by pivotally attaching a small-diameter main wheel instead of a large-diameter main wheel.

  One end of the crossbar is engaged with a crossbar bracket having an engagement part of an egg-shaped crossbar at the both ends of the frame having a substantially semicircular cross section, and the other end of the crossbar is the left and right seat frame It is possible to adjust the angle of the crossbar bracket. When the angle of the crossbar bracket was adjusted, the opening angle of the crossbar was adjusted, and the seat width on which the other end of the crossbar was pivotally attached could be adjusted. By making it possible to adjust the seat width, the seat width can be easily adjusted according to the physique of the occupant and the state of the disease.

  By adjusting the height of the armrest fitted to the armrest support frame, it is possible to adjust the position of the armrest to a position that does not get tired even if sitting for a long time according to the physique of the occupant and the state of the disease. Can do.

  By adjusting the height of the gripping part attached to the rear part of the backrest frame, when the main wheel is changed to a small-diameter wheel to make a nursing wheelchair, the gripping part is easy to grip according to the height of the caregiver Can be changed.

  Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the following embodiments within the scope of the gist of the present invention.

  As shown in FIG. 1, the unit type wheelchair 100 of the present invention includes a seat on the left and right seat frames 67, a grip 73 on the back frame 69, and a back plate 51 between the rear frame 61 and the back frame 69. And an armrest 71 pivotally mounted on the upper portion of the rear frame 61, a caster 82 rotatable on the front vertical frame 66, and a main wheel 81 between the rear frame 61 and the rear vertical frame 62. have. The rotatable caster 82 is attached to a caster bracket 11 capable of angle adjustment and height adjustment, and the main wheel 81 is screwed between the rear frame 61 and the rear vertical frame 62 and is positioned in the vertical and front-rear directions. Adjusting the seat width, which is pivotally attached to an adjustable plate 31 that can be adjusted, and has engaging portions that engage with one end of a cross-shaped bar 63 having a substantially egg-shaped cross section at both ends of a frame having a substantially semicircular cross section. And the other end of the cross bar 63 engaged with the cross bar bracket 41 is pivotally attached to the left and right seat frame 67 so that the seat width can be adjusted. It is a wheelchair.

  The armrest 71 is fitted and inserted into the armrest attaching portion 72 of FIG. 1 and is fixed by a lock pin 72a urged by a spring. When adjusting the height of the armrest 71, the lock pin 72a biased with the spring is pulled out and adjusted to a desired position, and then the lock pin 72a biased with the spring is inserted to move the armrest 71 to the desired height. Can be adjusted. The gripping portion 73 is inserted into the gripping portion attaching portion 74 of the backrest frame 69 and fixed with screws 74a. When adjusting the height of the gripping portion 73, the screw 74a can be loosened and adjusted to a desired height, and the screw 74a of the gripping portion attaching portion 74 can be tightened to adjust to the desired height. . A lever 69a attached to the rear portion of the backrest frame 69 enables the grip portion 73 and a part of the backrest frame 69 to be folded rearward of the wheelchair when the wheelchair is folded.

  The adjustable plate 31 that pivotally mounts the main wheel 81 of the unit type wheelchair 100 has a shape shown in FIG. The main wheel 81 is attached between the rear frame 61 and the rear vertical frame 62 using the adjustable plate 31. As shown in FIG. 2, the surface of the adjustable plate 31 is provided with fixing screw holes 32 and 36 for screwing the rear frame 61 and the rear vertical frame 62 with bolts and nuts. Three main wheel axle bearings 33, 34, and 35 are provided at the center of the adjustable plate 31. The three wheel bearings 33, 34, and 35 can move the position of the main wheel in three directions in the front-rear direction. FIG. 3 is a cross-sectional view of the adjustable plate 31 at the position of the A line. FIG. 4 shows the back surface of the adjustable plate 31. The height of the main wheel 81 is adjusted by screwing the adjustable plate 31 with bolts and nuts at arbitrary positions of a plurality of screw holes 61a, 62a formed in the side surfaces of the rear frame 61 and the rear vertical frame 62. Adjust the wheel height.

  By using the adjustable plate 31, it is possible to change from a large-diameter wheel for self-propulsion to a small-diameter wheel for nursing care. In addition, it is also possible to insert the axle of a small-diameter wheel into the lower hole 61b of the rear frame 61 and screw it with a nut so that the small-diameter wheel is brought into contact with the ground.

  The rotatable caster 82 projects the caster unit 21 at the lower end of the front vertical frame 66, and engages the caster bracket 11 with the caster unit 21 to adjust the angle of the caster 82. FIG. 5 shows the caster unit 21. FIG. 5 is a surface in contact with the caster bracket 11 of the caster unit 21. A serration portion 23 is provided at one end of the caster unit 21, and the fitting portion 14 of the caster bracket 11 is fitted into the fitting portion 24, so that the caster bracket 11 is stably held. After the serration portion 13 of the caster bracket 11 is engaged with the serration portion 23 of the caster unit 21 and adjusted to an arbitrary angle, the caster bracket 11 is fixed by the adjustment screw hole 22. As shown in FIG. 6, two screw holes 25 for adjustment for fixing the fitting portion 24 of the caster bracket 11 are provided on the back surface of the caster unit 21. FIG. 7 shows a cross section of the caster unit 21 at the B position. The caster bracket 11 attached to the caster unit 21 is serrated 13 as shown in FIG. 8 and meshes with the serration 23 of the caster unit 21. FIG. 9 shows a cross-sectional view at the position C in FIG. The caster support shaft 89 is fitted into the caster wheel bearing portion 16, and the fitting portion 14 is fitted into the fitting portion 24 of the caster unit 21, so that the caster bracket 11 is stably held. The adjustment screw hole 12 of the caster bracket 11 is provided with a substantially arcuate adjustment screw hole 12 for engaging the serration 13 provided in a fan shape with the serration 23 of the caster unit 21 and moving and fixing it at an arbitrary angle. It has been.

  FIG. 10 shows the caster support shaft 89 before the caster bracket 11 is attached to the caster 82. FIG. 11 shows an example in which the caster bracket 11 is inserted into the caster support shaft 89 of the caster bracket 11. In this state, the caster unit 21 is fitted into the fitting portion 24, the angle is adjusted, and the screw is fixed to the adjustment screw hole 12 with a screw. Further, the height of the caster 82 is adjusted by screwing the wheel at a desired position of the existing five-stage screw hole of the caster height adjusting portion 83. Further, as shown in FIG. 11, the nut 87 on the upper side of the caster support shaft 89 is removed, and the adjustment collar 88 on the caster bracket 11 is attached to a position below the caster bracket 11 as shown in FIG. 12. Thus, the position of the caster 82 can be increased by the height of the adjustment collar 88. With the combination of the caster bracket 11 and the caster unit 21 and the caster height adjusting unit 83, the angle and height of the caster 82 can be adjusted in accordance with the height of the main wheel 81.

  FIG. 13 shows a crossbar bracket 41 that can adjust the seat width of the unit type wheelchair 100. The crossbar bracket 41 includes a frame 44 having a substantially semicircular cross section and crossbar shaft mounting portions 43 and 45 having a substantially oval cross section. At both ends of the crossbar bracket 41, an opening 62a of the rear vertical frame 62 of the wheelchair and a front vertical frame are provided. It has the fitting insertion parts 42 and 46 for fitting in the opening part 66a (refer FIG. 17) of 66. Cross-bar shaft attachment portions 43 and 45 having a substantially oval cross section shown in FIGS. 15 and 16 are provided between the fitting insertion portions 42 and 46 and the frame 44 having a substantially semicircular cross section. FIG. 15 shows the side of the insertion portion, and FIG. 16 shows the side of the substantially semicircular frame 44 in the cross section taken along the arrow D in FIG. A crossbar support portion 49 provided with a crossbar 63 is pivotally mounted on the crossbar fixing portions 47 and 48 of the crossbar shaft mounting portions 43 and 45 having a substantially oval cross section. As shown in FIG. 17, the crossbar support portion 49 pivotally attached to the crossbar has crossbars fitted at both ends into the opening 62a of the rear vertical frame 62 of the wheelchair and the opening 66a of the front vertical frame 66, respectively. Cross sections attached to both ends of the bracket 41 are pivotally attached to the substantially oval crossbar pivot portions 43 and 45. As shown in FIG. 18, the seat width is adjusted such that the cross sections attached to both ends of the opening 62 a of the rear vertical frame 62 and the crossbar bracket 41 inserted into the opening 66 a of the front vertical frame 66 are substantially egg-shaped. If the angle of the cross-bar shaft attachment parts 43 and 45 (semi-circular pipe can be rotated 90 degrees) is adjusted to an arbitrary position and fixed with screws 62b and 66b, the opening angle of the cross bar 63 is limited ( The seat width can be changed in several steps (for example, with an interval of 20 mm).

  As shown in FIG. 19, the crossbar support portion 49 pivotally attached to the crossbar has crossbars fitted at both ends into the opening 62a of the rear vertical frame 62 of the wheelchair and the opening 66a of the front vertical frame 66, respectively. The bracket 41 is pivotally attached to substantially egg-shaped crossbar pivot portions 43 and 45 which are attached to both ends of the bracket 41. As shown in FIG. 18, the seat width is adjusted in a substantially oval shape that is attached to both ends of the crossbar bracket 41 fitted into the opening 62 a of the rear vertical frame 62 and the opening 66 a of the front vertical frame 66. The angle of the crossbar shaft mounting portion 43 (a semicircular pipe can be rotated by 90 degrees) is adjusted to an arbitrary position, and 62b and 66b are fixed by the locking tool 92. When the positions of 62b and 66b are fixed by the locking tool 92 shown in FIG. 20, the opening angle of the cross bar 63 is limited (for example, at intervals of 20 mm), and the seat width can be changed in several steps. Also, unlike the case of fixing with screws, the attachment can be done quickly. As shown in FIG. 20B, one end of the locking tool 92 is pivotally attached to a shaft attachment portion 95 of the holding portion 93, and the pin 94 rotates around the shaft attachment portion 95. The inner diameter of the holding portion 93 is substantially the same as the outer diameter of the outer tube, and the pin 94 of the locking tool 92 is inserted into the holes 62b and 66b so that the sandwiched portion 93 is inserted into the outer diameter of the outer tube. As shown in FIG. 20-1, the pin tip enters the pin hole 96 of the holding portion 93 shown in FIG. 20-1, and is stably held in the shape shown in FIG. 20-3. When removing the locking device 92, if the end edge 97 of the narrowing portion 93 is raised from the outer tube with a finger, the pin 94 comes out of the pin hole 96 of the locking device 92, and the holding portion 93 is attached to the pin shaft. The locking tool 92 can be easily removed from the outer tube and the inner tube by rotating at the portion 95.

  Further, when the width of the seat is adjusted by adjusting the width of the crossbar, the crossbar fixing arm 91 for fixing the position of the crossbar is fixed with a bolt and a nut. By exchanging these bolts and nuts with pinned bolts 101, the width of the cross bar 63 can be easily adjusted. As shown in FIG. 21, the pinned bolt 101 illustrated here has a wing-like handle 102 attached to the top of the pinned bolt 101 and a pin 103 provided with a button 103 at the center thereof. It is. By pressing the button 103 at the top of the pin-equipped bolt, the pin 104 at the lower end is fitted into the bolt, and the pin-equipped bolt 101 can fit and remove the hole in the crossbar 63 and the hole in the crossbar fixing arm 91. If the button 103 is released through the pin bolt 101 through the hole at a desired position, the pin bolt 101 cannot be removed.

  A back plate 51, which is attached between the rear frame 61 and the rear vertical frame 62 and adjusts the angle of the backrest frame 69, has a shape showing the front surface in FIG. 22 and the back surface in FIG. The back plate 51 has a rear frame attachment portion 54 attached to the rear frame 61 and a rear vertical frame attachment portion 55 attached to the rear vertical frame 62, and is fixed to the rear frame 61 and the rear vertical frame 62, respectively. To do. The back plate 51 fixed between the rear frame 61 and the rear vertical frame 62 is screwed to the back plate 51 shown in FIG. 22 with the back frame 69 by two screws, the fixing screw hole 52 and the angle adjusting screw hole 53. To do. When the angle of the backrest frame 69 is adjusted, the screws screwed into the fixing screw holes 52 and the plurality of continuous angle adjusting screw holes 53 are loosened, and the screws of the fixing screw holes 52 are used as fulcrums. The angle of the backrest frame 69 or the depth of the seat can be adjusted by moving the screwing position of the adjusting screw hole 53 back and forth and tightening the screw.

The side view of a unit type wheelchair. The front view of an adjustable plate. Sectional drawing in the A position of the adjustable plate of FIG. The back view of an adjustable plate. The front view of a caster unit. The back view of a caster unit. Sectional drawing in the B position of the caster unit of FIG. The front view of a caster bracket. Sectional drawing in the C position of the caster bracket of FIG. The side view of a caster. The side view which attached the caster bracket to the caster. The side view which changed the position of the caster bracket and adjustment collar of a caster. Crossbar bracket top view. Crossbar bracket side view. The front view of a substantially oval crossbar axial attachment part. FIG. 15 is a cross-sectional view taken along the arrow D in FIG. The partial side view of a flame | frame. The partial perspective view of a crossbar and a crossbar bracket. The partial perspective view of angle adjustment of a crossbar and a crossbar bracket. The side view of the metal fitting for angle adjustment of a crossbar. The side view of the stop for angle adjustment of a crossbar bracket. The surface view of a backplate. The back view of a backplate.

Explanation of symbols

100: Unit type wheelchair 11: Caster bracket 12: Adjustment screw hole 13: Serration part 14: Insertion part 15: Caster support part 16: Caster axle hole 17: Fixing screw hole 18: Caster wheel bearing part 21: Caster unit 22: adjustment screw hole 23: serration part 24: fitting part 25: adjustment screw hole 26: fixing screw hole 31: adjustable plate 32: fixing screw hole 33: axle bearing 34: axle bearing 35: axle bearing 36 : Screw hole 41 for fixing: Cross bar bracket 42: Insertion portion 43: Attached portion 44 of substantially oval crossbar: Frame 45: Attached portion 46 of substantially oval crossbar: Insertion portion 47: Cross Bar fixing part 48: Cross bar fixing part 49: Cross bar support part 51: Back plate 52: Fixing screw hole 53: Angle adjusting screw hole 6 : Rear frame 62: Rear vertical frame 63: Cross bar 64: Lower auxiliary frame 65: Side frame 66: Front vertical frame 67: Seat frame 68: Armrest support frame 69: Backrest frame 71: Armrest 72: Armrest attachment part 73: Gripping part 74: Height adjustment part 81 of the gripping part: Main wheel 82: Caster 83: Caster height adjustment part 84: Footrest 85: Footrest support part 86: Footrest support frame 87: Nut 88: Adjustment collar 89: Caster support shaft 91: Crossbar fixing arm 92: Locking tool 93: Holding portion 94: Pin 95: Shaft mounting portion 96: Pin hole 97: Edge edge portion 101: Bolt 102 with pin 102: Wing handle 103: Button 104: pin

Claims (4)

The angle of the backrest having a fixing screw hole 52 and a plurality of continuous angle adjusting screw holes 53 between the backrest frame 69 having the grip 73 at the rear and the rear frame 61 to which the armrest support frame 68 is attached. A back plate 51 capable of adjusting
The adjustable plate 31 which can adjust the position of the main wheels 81 pivotally mounted to the main wheel 81 between the rear frame 61 and the rear vertical frame 62,
One end of the cross bar 63 is pivotally attached to the left and right of the seat frame 67, the frame 44 substantially semicircular cross-section which can adjust the angle of opening of the crossbar 63 and pivotally to the other end of the crossbar 63 Crossbar shaft mounting portions 43 and 45 having a substantially oval cross section, and an opening portion of the rear vertical frame 62 of the wheelchair and an insertion portion 46 for inserting into the opening portion of the front vertical frame 66 at both ends thereof. A crossbar bracket 41 having;
Wherein the lower end of the front vertical frame 66, projecting a caster unit 21 serration portion 23 is provided in the loading section 24 and one end fitting portion which is fitted with the fitting portion 24 of the caster unit 21 a serration portion 13 and the caster 82 which can adjust the angle of the caster 82 fitted with casters 82 for rotatably caster bracket 11 with a caster wheel bearing unit 16, which meshes 14 and the serration portion 23,
A unit type wheelchair characterized by comprising: The armrest 71 is fitted and inserted into an armrest attaching portion 72, fixed by a lock pin 72a biased by a spring , and the height of the armrest 71 can be adjusted by inserting / removing the lock pin 72a. Item 1. A wheelchair unit type. A gripping portion 73 is attached to the gripping portion attaching portion 74 of the backrest frame 69 so that the height can be adjusted with a screw 74a. The unit type wheelchair according to claim 1, wherein the unit type wheelchair is installed . In a wheelchair capable of adjusting the seating width of the wheelchair by changing the angle of the crossbar, a locking device 92 including a narrow portion 93 and a pin 94 and a width of the crossbar are set in order to fix the angle of the crossbar. The unit-type wheelchair according to any one of claims 1 to 3 , wherein a pinned bolt 101 is used to fix the crossbar fixing arm 91 that adjusts and adjusts the seat width .

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