JP2019058357A - wheelchair - Google Patents

Abstract

To provide a wheelchair, when a hunchback elderly person with the kyphosis, the person whose backbone is roundly bent forward, allowing the elderly to comfortably sit on a wheelchair for a prescribed time by supporting the pelvis of the person, supporting the femoral region in a knee back side, and preventing a part in the ischial bone side from slipping to a front side on a seating face and from sliding down from the wheelchair.SOLUTION: The wheelchair includes a back-seat base seat 4 attached from a back side 2 to a seat side 3 of a wheelchair 1. The back-seat base seat is so attached as to backward/forward adjust a position of a base-seat curving portion 4a, the changing portion from the back side 2 to the seat side 3. A backrest cushion 5 having a pelvis support 51 at a lower end side is attached to the back side 2 of the back-seat base seat 4 so as to accord the pelvis support 51 to the base-seat curving portion 4a, and a seat face cushion 6 having a bulge part 61 at the front side is attached to the seat side 3 of the back-seat base seat 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wheelchair for elderly people with weakened legs and, more particularly, to a wheelchair in which an elderly person with a circular back who has a scoliosis with a spine with a curled front side can comfortably sit.

  A wheelchair is used to move while a non-healthy person such as a sick person, an old man or a disabled person is sitting, because the backrest and the seat are easily folded in the center so that he can carry it easily on a car etc. Often have a structure that For this reason, the construction of the backrest and the seat surface is a simple structure so as to be easy to fold, and as a result, the sitting comfort is sacrificed.

JP 02-46845 Unexamined-Japanese-Patent No. 2010-99453

  By the way, when an old man with a back curvature who has a spine spinosis with a spine curled forward, many of the old people with a round back who are sitting in a wheelchair have their bodies on the seat of the wheelchair over time It becomes difficult to support the trunk. In the relationship between the backrest and the seat surface as shown in FIG. 9, the trunk leans or twists forward, and a gap is created between the lower backrest and the pelvis of the old man with a circular back (see FIG. 9). ) And pelvis was not supported, and it became painful, and as a result, it was difficult to stay in a wheelchair comfortably for a fixed time. Also, there was a possibility that the skewer side slipped forward on the seat surface and slipped from the wheelchair.

  SUMMARY OF THE INVENTION In view of the above problems, the present invention has been made to solve the problems, and an object of the invention is to provide a person with a circular back who has a vertebral gonorrhea, whose spine is curved forward. When sitting in a wheelchair, it supports the person's pelvis and also supports the thighs on the back of the knee, and prevents the seat bone from sliding forward on the seat surface to prevent it from falling off the wheelchair, making the wheelchair comfortable for a certain period of time To provide a wheelchair that can stay seated.

  In order to achieve the above problems, the invention according to claim 1 includes a back seat base sheet attached from the back side to the seat side of a wheelchair, and the base sheet bends at a point where the back side changes to the seat side. The back seat base sheet is attached to the wheelchair with its position adjusted back and forth, and a backrest cushion provided with a pelvis support at the lower end is attached to the back side surface of the back seat base sheet, and the backrest A seat cushion having a pelvic support at the lower end side of the cushion corresponding to the base sheet bending portion and a convex portion extending upward on the front seat surface is a seat cushion of the back seat base sheet at the seat side Support the pelvis of the back with a curved back seated in a wheelchair with the pelvis support on the lower end side of the above-mentioned backrest cushion, to the front of the ischium of the said back The Ri are those composed of means for preventing at the front side of the bulge portion of the seat surface cushion.

  According to a preferred aspect of the present invention, a footrest for footrest is provided below the space between the front end of the seat cushion and the caster in front thereof. In claim 3, the pelvis support comprises a cushioning material and a pelvic support plate attached to the cushioning material. In the fourth aspect of the present invention, the seat cushion comprises a cushioning material and a pelvis support plate attached to the lower surface side of the cushioning material on the front side of the seat cushion.

According to the wheelchair of claim 1, when attaching the back seat base sheet from the back side to the seat side of the wheelchair, the position of the base sheet bending portion of the back seat base sheet is adjusted, and the lower end side is installed. By attaching a backrest cushion provided with a pelvis support to the back surface, the pelvis of the back with a bent back can be supported by the pelvis support on the lower end side of the backrest cushion. As a result, using the gravity with the pelvis being supported and pushed up by the pelvis support, the circular back with a curved back uses the gravity and the trunk of the circular back extends in the backward direction by the principle of leverage and the face I can improve my attitude to sit in a wheelchair.
In addition, since the bulging portion is formed on the front surface of the seat cushion, the buttocks of a person with a bent back who sits in a wheelchair is locked to the bulging portion, and the person of the person who is seated in a wheelchair can It is possible to prevent the ischial from shifting forward.
In addition, on the front side of the seat cushion that projects forward, it is possible to support the thigh behind the knee that protrudes from the front end of the wheelchair. In this way, it is possible to eliminate the pain of the person behind the back of the person who is not supported by the thigh near the back of the knee.
Thus, when a person with a bent back who sits in a wheelchair sits in a wheelchair, he / she supports the person's pelvis, supports the thigh behind the knee, and the ischium slides forward on the seat cushion By preventing the wheelchair from sliding down, the circular person can have a very novel and beneficial effect, such as being able to sit comfortably in the wheelchair for a certain period of time.

  Further, in the invention of claim 2, in addition to the above-mentioned effects, a footrest for footrest is provided below the front end of the seat cushion and the caster in front thereof. Bent roundbacks often can not put their feet on the footrest in the front, and trying to put their feet on the footrest in the front will have to slide the ischium forward, which means putting the buttocks forward In the case of the present invention, the footrest may be located near the lower foot in the present invention. Because it is supposed to come on, a person with a bent back can put his or her feet on the footrest without sliding the ischium forward. In addition, even when the user stands on the footrest while standing on the footrest, since the caster is located on the front side of the footrest, the wheelchair can be prevented from falling.

  Further, in the invention of claim 3, in addition to the above effects, the pelvis support is composed of a cushioning material and a pelvis support plate attached to the cushioning material. It can support gently from the lower side, and can firmly support the pelvis of a person with a circular back without being deformed by the pelvis support plate.

  Further, in the invention of claim 4, in addition to the above effects, the seat cushion comprises a cushion material and a pelvis support plate attached to the lower surface side of the cushion material on the front side of the seat cushion. It is possible to firmly support the front side of the seat cushion that is partially extended to the front side so as not to bend downward, without being deformed by the front cushion side support plate. For this reason, the bulge on the front side of the seat cushion does not sink downward, and the ischium of the circular person sitting on the wheelchair moves forward by the bulge on the front side of the cushion It can be prevented surely. In addition, in the absence of the pelvis support plate, the thighs are moved to the center by the slack sheet and the seat is cramped, but this problem can be solved by the pelvis support plate.

It is a schematic side view of the wheelchair which shows the form for implementing this invention. It is a schematic perspective view of the wheelchair at the time of back seat part base sheet attachment which shows the form for implementing this invention. It is a schematic perspective view of the wheelchair at the time of the backrest cushion attachment which shows the form for implementing this invention. It is a schematic perspective view of the wheelchair at the time of seat attachment which shows the form for implementing this invention. (A) is a cross-sectional view of a backrest cushion showing a mode for carrying out the present invention. (B) is a fragmentary sectional view of the attachment position of the backrest cushion which shows the form for implementing this invention. It is sectional drawing of the seat cushion which shows the form for implementing this invention. It is principle explanatory drawing which shows the form for implementing this invention. It is a schematic perspective view of the wheelchair of another example which shows the form for implementing this invention. It is conventional explanatory drawing.

  Hereinafter, the present invention will be more specifically described based on the embodiments for carrying out the invention described in the drawings.

  In the figure, the wheelchair 1 is provided with a pair of left and right back frames 21 extending in the vertical direction on the back side 2 which is the back side of the circular back a with a back that sits on it, and the back sitting on this is bent A pair of side frames 31 extending substantially horizontally forward from the lower side of each of the left and right back frames 21 is provided on the seat side 3, which is the buttock side of the circular spine a.

  The left and right back frames 21 are attached to the rear sides of the left and right side frames 31 in a state of being slightly upward and backwardly inclined. Upper portions of the left and right back frames 21 are horizontally bent rearward to have handles 22 attached thereto. The left and right grips 22 are places where the caregiver grips the wheelchair 1 by hand.

  A backrest sheet 23 is attached between the upper portions of the left and right upward inclined back frames 21. That is, the left end side of the backrest sheet 23 is attached to the left back frame 21, and the right end side of the backrest sheet 23 is similarly attached to the right back frame 21. The backrest sheet 23 is supported at its both ends by the left and right back frames 21.

  The backrest sheet 23 supports the back side 2 of the back seat base sheet 4 attached to the upper side thereof and the backrest cushion 5, and supports the back side of the circular back a whose back is bent sitting on the wheelchair 1 through this. As the backrest seat 23, a flexible and flexible seat is used so that the center bends when the wheelchair 1 is folded.

  Armrests 32 are respectively mounted above the left and right side frames 31. The lower portions on the front and rear sides are supported by the front and rear armrest support frames 32 a attached to the left and right armrests 32 upward, for example, from the front and rear of the side frame 31.

  A seat 33 is attached between the side frames 31 substantially horizontal in the front-rear direction of the left and right. That is, the left end side of the seat 33 is attached to the side frame 31 on the left side, and similarly, the right end of the seat 33 is attached to the side frame 31 on the right. The seat 33 is supported at its both ends by the left and right side frames 31.

  The seat 33 supports the seat side 3 of the back seat base sheet 4 attached to the upper side thereof and the seat cushion 6 and supports the buttocks side of the circular back a whose back is seated on the wheelchair 1 through this. . As the seat 33, a flexible and flexible seat is used so that the center is bent when the wheelchair 1 is folded.

  The back seat base sheet 4 is attached from the back side 2 to the seat side 3 of the wheelchair 1. The back cushion 5 is attached to the surface of the back side 2 of the back seat base sheet 4, and the seat cushion 6 is attached to the surface of the seat side 3 of the back seat base sheet 4. The back seat base sheet 4 functions to adjust the tilt of the backrest cushion 5, the position of the pelvic support, and the front-back position of the seat cushion 6.

  The back seat base sheet 4 is attached and held at one end 41 thereof to a backrest sheet 23 attached between the upper portions of the left and right back frames 21 of the wheelchair 1. The back seat base sheet 4 attached from the back side 2 to the seat side 3 has the other end 42 extending to the seat side 3 held by the seat 33 of the seat side 3.

  A surface fastener 33 a is attached to the front surface of the seat 33. Further, on the back surface side of the other end side 42 of the back seat portion base sheet 4, a surface fastener or a cover (not shown) which is fixed to the surface fastener 33a of the seat sheet 33 is attached. Thus, the other end 42 of the back seat base sheet 4 is held by the seat 33.

  The width of the back seat base sheet 4 is narrower than the distance between the left and right back frames 21 and the length is close to the total length of the back side 2 and the seat side 3 and the other becomes the front side of the seat side 3 The end side 42 has a cut in the center and is divided into right and left, and when pulling out the other end side 42 of the back seat base sheet 4 to the front side, it is easy to grasp and pull out the part divided into right and left There is.

  The back seat base sheet 4 attached to the wheelchair 1 has one end 41 held on the upper side of the back side 2 of the wheelchair 1 as viewed from the side, and inclines obliquely downward with the back 2 facing forward, the back side It bends substantially horizontally near the boundary between 2 and the seat side 3 and extends to be held near the front of the seat side 3. Then, the base sheet bending portion 4a of the back seat portion base sheet 4 which is a portion to be changed from the back side 2 to the seat portion side 3 is a position to support the pelvis of the circular person a whose back is bent sitting on the wheelchair 1.

  The base sheet bending portion 4a corresponding to the position supporting the pelvis of the circular back a adjusts the back and forth position of the bending portion 4a by adjusting the withdrawal state of the other end side 42 of the back seat portion base sheet 4 can do. For example, the base sheet bending portion 4a is moved to a position closer to the front side of the seat side 3 by pulling out the other end side 42 of the back seat base sheet 4 to the front side, ie, the front side of the seat side 3 It can be done.

  As described above, the backrest cushion 5 and the seat cushion 6 are attached to the surface of the back seat base sheet 4 respectively. For this reason, on the surface of the back seat base sheet 4 on the back side 2 to which the backrest cushion 5 is attached, back surface fasteners 43 are respectively attached on the left and right. Similarly, on the surface of the other end side 42 of the back seat base sheet 4 on the seat side 3 divided into right and left, seat surface fasteners 44 are respectively attached to the left and right sides thereof.

  The backrest cushion 5 is for supporting the back side of the circular back a bent in the wheelchair 1 and is attached to the surface of the back side 2 of the back seat base sheet 4 described above. The width of the backrest cushion 5 is a length that fits just between the left and right back frames 21 and the height of the backrest cushion 5 is from the base sheet bending portion 4a of the back seat base sheet 4 to one end of the back seat base seat 4 It is about the length to the side 41. On the back side of the backrest cushion 5, a hook-and-loop fastener 5a for fastening to the back surface fastener 43 is attached. The backrest cushion 5 is thereby held on the back side 2 of the back seat base sheet 4.

  Inside the lower side of the backrest cushion 5, a pelvis support 51 is provided which supports the pelvis of the circular person a whose back is bent sitting on the wheelchair 1. The pelvis support 51 on the lower side of the backrest cushion 5 is positioned so as to support the pelvis of the rounded back person a sitting on the wheelchair 1, that is, to come to the base sheet bend 4a of the back seat base sheet 4, The cushion 5 is attached to the back seat base sheet 4. At this time, the back seat base sheet 4 is also adjusted and attached between the back side 2 and the seat side 3 so that the pelvis support 51 of the backrest cushion 5 comes to such a position. The mounting position of the back seat base sheet 4 is adjusted by pulling out the other end side 42.

  The pelvis support 51 is made of, for example, a cushion made of urethane so as to support the pelvis of the circular back person a whose back is bent gently from the lower side. The width of the pelvis support 51 is about the same as the width of the backrest cushion 5, and the vertical height of the pelvis support 51 is about half the height of the backrest cushion 5. The pelvis support 51 is provided in a range from the lower end side of the backrest cushion 5 to about the height of half the backrest cushion 5.

  The pelvis support 51 is configured such that the lower end side of the portion corresponding to the pelvis of the circular back a has the most thickness of the cushion material, and can gently support the pelvis of the circular back a with a bent back from below. Is considered. The cushioning material of the pelvis support 51 extends near the middle in the height direction of the backrest cushion 5 while its thickness gradually decreases toward the upper side of the back.

  In addition, a pelvis support plate 51a that does not easily deform so that it can firmly support the pelvis of the circular person a whose back is bent at the region where the thickness of the cushion material is the thickest on the lower end side of the pelvis support 51 It is attached. The pelvis support plate 51a is attached to the back side of the cushion material which is opposite to the side that touches the pelvis of the circular back a. That is, the pelvis support plate 51a is configured to support the pelvis side of the circular person a via the thick cushion material. For example, a resin plate having a thickness of 3 mm is used for the pelvis support plate 51a. The pelvis support plate 51a is bonded to the cushion material with an adhesive or the like.

  The seat cushion 6 supports the buttocks and the thighs of the circular person a at the place where the circular person a, whose back is bent, who sits on the wheelchair 1 sits directly. The seat cushion 6 is attached to the surface of the seat side 3 of the back seat base sheet 4. The width of the seat cushion 6 is a length that fits just between the left and right side frames 31, and the front-rear length of the seat cushion 6 is a length that fits just on the seat side 3.

  However, when the seat cushion 6 is shifted forward, from the base sheet bending portion 4a of the back seat base sheet 4 to the front from the other end 42 of the back seat base sheet 4 and the front end of the seat 33 It has a length enough to overhang. On the back surface side of the seat cushion 6, a surface fastener 6a for fastening to the seat portion surface fastener 44 is attached. Thus, the seat cushion 6 is held by the seat side 3 of the back seat base sheet 4.

  The inside of the seat cushion 6 is made of, for example, a thick cushion made of urethane so that the buttocks and the thighs of the bent-back person a who is seated in the wheelchair 1 can be gently supported from below. It is done. The sitting comfort is improved when the circular person a sits on the wheelchair 1.

  The back of a circle a sitting on the wheelchair 1 becomes difficult to support its trunk with the passage of time, and the back is bent, and the bent back abuts against the back cushion 5 to support it. As a result, the ischial is inevitably pushed forward, and as the back curvature increases, the ischial side shifts forward. Therefore, the seat cushion 6 is provided with an anti-skid anti-slip function for preventing the ischial side of the circular person a sitting on the wheelchair 1 from being displaced forward.

  The seat cushion non-slip function of the seat cushion 6 has a structure in which a bulging portion 61 is formed in which the front side of the seat cushion 6 on which the buttocks of the circular back a do not rest is slightly higher than the rear side on which the butts rest There is. The front of the seat cushion 6 has a bulging portion 61 convex upward from the rear surface of the seat on which the buttocks rest, so that the buttocks of the circle a are engaged with the bulging portion 61. It is stopped and it is prevented that the ischium of circle back person a who sits in wheelchair 1 shifts to the front side.

  Moreover, the front side of the seat cushion 6, which is partially projected forward from the front end of the seat 33, does not bend downward at the lower surface of the seat cushion 6 where the bulge portion 61 is formed. A seat cushion front side support plate 61a which is not easily deformed is attached so that it can be firmly supported. For example, a resin plate having a thickness of 3 mm is used for the seat cushion front side support plate 61a. The seat cushion front side support plate 61 a is bonded to the lower surface side of the cushion material inside the seat cushion 6 with an adhesive or the like.

  Main wheels 7 for moving the wheelchair 1 in the front-rear direction are rotatably attached to the outer sides of the left and right back frames 21 and the side frames 31 constituting the wheelchair 1. Moreover, smaller casters 71 than the main wheel 7 are attached to lower portions on the front side of the left and right side frames 3 respectively. The left and right casters 71 are freely pivotable in the direction of 360 degrees.

  Further, footrests 8 for footrests are attached to front portions of the left and right side frames 4 of the wheelchair 1, respectively. As shown in FIG. 1, the left and right footrests 8 are attached to the seat cushion 6 from the left and right casters 71. That is, the caster 71 is located forward of the footrest 8. The left and right footrests 8 are mounted so as to be located directly below the front end of the seat 33.

In many cases, it is not possible to put a foot on the footrest 8 located on the front, and if you try to put your foot on the footrest ahead, you have to slide the ischium forward.
In other words, it comes to cope by putting the butt in front, and it becomes a more severe posture. It becomes a so-called sitting place like sitting on the back.

On the other hand, in the present invention, since the footrest 8 comes to a position directly below the front end of the seat 33, the back of a person with a bent back does not slide out the ischium forward. Can be placed on In addition, even if the footrest 8 is placed on the footrest 8, the caster 71 is positioned on the front side of the footrest 8, so that the wheelchair 1 can be prevented from falling.

Next, a method of using the wheelchair (see FIGS. 2 to 4) and an operation (see FIG. 7) based on the configuration of the embodiment for carrying out the invention will be described below.
As shown in FIG. 2, the back seat base sheet 4 is attached to the back side 2 and the seat side 3 of the wheelchair 1 before the back of the person who has a bent back a sits on the wheelchair 1. That is, one end side 41 of the back seat base sheet 4 is attached to the backrest sheet 23 provided between the upper side of the back side 2. Thereby, the one end side 41 of the back seat base sheet 4 is held by the backrest sheet 23.

  Thereafter, the other end side 42 of the back seat base sheet 4 is pulled forward, and the position of the base sheet bending portion 4a is adjusted to correspond to the position of the pelvis of the circular person a who sits on the wheelchair 1. The back seat portion base sheet 4 is inclined obliquely downward on the back side 2 and bent substantially horizontally at the base sheet bending portion 4 a and placed on the surface of the seat sheet 33. Since the surface fastener 33a is attached to the surface of the seat sheet 33, a part of the back side of the back seat base sheet 4 that comes to the seat sheet 33 side is fastened and held by the surface fastener 33a, It does not shift to the left and right.

  After attaching the back seat base sheet 4 over the back side 2 and the seat side 3 of the wheelchair 1, as shown in FIG. 3, the back side 2 of the back seat base sheet 4 is provided with a pelvis support 51 at the lower end. Attach the backrest cushion 5. In the backrest cushion 5, the hook-and-loop fastener 5a attached to the back surface side thereof is fixed to and held by the back surface hook-up fastener 43 attached to the back side 2 of the back seat base sheet 4. . At this time, the pelvis support 51 on the lower end side of the backrest cushion 5 is positioned at the base sheet bending portion 4a.

  Subsequently, as shown in FIG. 4, the seat cushion 6 is attached to the seat side 3 of the back seat base sheet 4. The seat cushion 6 is fixedly held by the seat surface fastener 44 attached to the seat side 3 of the back seat base sheet 4 with the surface fastener 6a attached to the lower surface side thereof, and is displaced in the front, rear, left, and right There is nothing to do. At this time, the front end of the seat cushion 6 generally protrudes forward from the front end of the seat 33. This is because the base sheet bending portion 4 a of the back seat base sheet 4 is located closer to the front side of the seat sheet 33. That is, the rear end of the seat cushion 6 is located at the base sheet bending portion 4a, and the front end of the seat cushion 6 is located forward by the front-rear length thereof from there.

  As described above, after attaching the backrest cushion 5 and the seat cushion 6 to the wheelchair 1, the circular person a whose back is bent sits on the wheelchair 1. When sitting in the wheelchair 1, the seat bone of the circular back a bent is located on the lower end side of the backrest cushion 5, but since the pelvic support 51 is attached at this location, the pelvic support 51 It will be supported.

  And, as shown in the principle explanatory view of FIG. 7, the circular spine a whose back is bent utilizes gravity by using the pelvis supported and pushed up by the pelvis support 51, and by the principle of leverage, the circular spine a The trunk of a is extended backward, the face is improved, and the posture for sitting on the wheelchair 1 can be improved. Since the swelling part 61 is formed in the surface of the front side of the seat cushion 6, coupled with this, the buttocks of the yen a are locked to the swelling part 61 and the circle a sits on the wheelchair 1 It is possible to prevent the ischial from shifting forward.

  Moreover, in this case, the front side of the seat cushion 6 projecting forward from the front end of the seat 33 is supported by the seat cushion front side support plate 61 a on the lower side, so a circle sitting on the wheelchair 1 Even if the force to move the ischium of the back a forward acts, it does not bend downward. Therefore, the bulge 61 on the front side of the seat cushion 6 does not sink downward, and the ischium of the circular member a sitting on the wheelchair 1 moves forward, the front of the seat cushion 6 The side bulge 61 can be reliably prevented.

  Furthermore, on the front side of the seat cushion 6, which projects forward from the front end of the seat 33, the thigh on the back side of the knee protruding from the front end of the seat 33 of the wheelchair 1 can be supported. As a result, it is possible to eliminate the pain of the person a who is behind due to the thighs near the back of the knee of the person a having a bent back being not supported.

  Further, since the footrest 8 comes to a position directly below the front end of the seat 33, the back of a person who has a bent back can place his or her feet on the footrest 8 without sliding out the ischium. It is possible to eliminate the pain of the yen a due to the fact that both feet are not supported. Furthermore, since the caster 71 is located on the front side of the footrest 8 even when the footrest 8 is suddenly stood with the foot on the footrest 8, the wheelchair 1 can be prevented from falling.

  By the way, in the other example shown in FIG. 8, when a person who is not a person whose back is bent is not seated on the wheelchair 1 of the present invention, the base seat bending portion is attached to attach the back seat base sheet 4 to the wheelchair 1. The other end side 42 of the back seat base sheet 4 is adjusted so as not to be drawn to the near side so that 4 a is located at the rear end of the seat 33. Then, the pelvis support 51 on the lower end side of the backrest cushion 5 is located at the rear end of the seat 33, and it becomes possible to use a person who does not bend his back as a normal wheelchair.

  The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

1 Wheelchair 2 Back Side 21 Back Frame 22 Handle 23 Back Seat 3 Seat Side 31 Side Frame 32 Armrest 32 a Arm Support Frame 33 Seat Seat 33 a Hook Fastener 4 Back Seat Base Seat 4 a Base Seat Curved Part 41 Other Side End side 43 Back surface fastener 44 Seat surface surface fastener 5 Back cushion 5a Surface fastener 51 Pelvic support 51a Pelvic support plate 6 Seat surface cushion 6a Surface fastener 61 Bulging part 61a Seat surface cushion front side support plate 7 Main wheel 71 Caster 8 Footrest

Claims (4)

The back seat base sheet is provided with a back seat base sheet attached from the back side to the seat side of the wheelchair, and the position of the base sheet bending portion which is a place to be changed from the back side to the seat side is adjusted back and forth Attach the backrest cushion with the pelvis support at the lower end side to the wheelchair and attach it to the surface on the back side of the back seat base sheet so that the pelvis support at the lower end side of the backrest cushion corresponds to the base sheet bending portion Attach a seat cushion with a convex bulge upward to the front seat surface and attach it to the seat side surface of the back seat base sheet, and place the back of a wheelchair in the back with a bent back The pelvis is supported by the pelvis support on the lower end side of the backrest cushion, and the forward sliding of the ischium of the relevant circular back is prevented by the bulge on the front side of the seat cushion. Wheelchair, characterized in that. The wheelchair according to claim 1, wherein a footrest for footrest is provided below the front end of the seat cushion and the caster in front thereof. The wheelchair according to claim 1, wherein the pelvis support comprises a cushioning material and a pelvis support plate attached to the cushioning material. The wheelchair according to claim 1, wherein the seat cushion comprises a cushioning material and a pelvis support plate attached to the lower surface side of the cushioning material on the front side of the seat cushion.

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