Wheelchair and wheelchair fixing structure

Abstract

To provide a wheelchair capable of enhancing safety of an occupant by restraining the body of the occupant.SOLUTION: A wheelchair 1 according to the present invention includes a wheelchair body 3 and a three-point seat belt device 4 provided on the wheelchair body 3. The wheelchair body 3 includes a frame body supported by a pair of right and left front wheels 5, 5 and a pair of right and left rear wheels 6, 6, and a sheet body 8 stretched on the frame body. The seat body 8 includes a seat 9 and a backrest 10 extending upward from a rear edge of the seat 9, and the back of an occupant 2 is supported by the backrest 10 in a state in which the occupant 2 is seated on the seat 9. The seat belt device 4 can restrain the occupant 2 by a shoulder belt part 12 extended to a front side of the shoulder part and the chest part on one of the left and right sides of the occupant 2 and a lap belt part 13 extended to a front side of the waist part of the occupant 2 in a state in which the occupant 2 is seated on the seat 9.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a wheelchair equipped with a seat belt device and a fixing structure for said wheelchair. [Background technology]

[0002] In Japan, the aging population is progressing, and the number of people requiring nursing care and assistance is increasing. Many of these people ride in a vehicle in a wheelchair when going to a nursing facility, etc. In recent years, vehicles equipped with wheelchairs with occupants on board have been increasingly involved in traffic accidents. In Shiga Prefecture, Japan, two of the 38 people who died in traffic accidents in 2022 died in accidents that occurred while they were riding in a wheelchair mounted on the vehicle. In addition, in all similar fatal accidents that have occurred in Shiga Prefecture so far, the occupants suffered fatal injuries due to insufficient restraint of the occupants in the wheelchair. Similar problems (problems of wheelchair occupants suffering injuries) have also occurred in public transportation vehicles such as buses. Therefore, there is a demand for the development of a safety system that restrains the bodies of wheelchair occupants (especially those in wheelchairs mounted on vehicles).

[0003] Here, the following Patent Document 1 discloses a technology for fixing a wheelchair in the passenger compartment of a vehicle (bus) by connecting the side wall of the passenger compartment to the legs of the wheelchair with a belt member when the wheelchair is placed inside the passenger compartment. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-85068 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, although Patent Document 1 uses a belt member to secure the wheelchair to the vehicle (bus), it does not secure the wheelchair occupant to the wheelchair. Therefore, there is a risk that the wheelchair occupant may be thrown out of the wheelchair and injured by the impact of a traffic accident or emergency braking.

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and its object is to provide a wheelchair that is capable of restraining the occupant's body, thereby increasing the safety of the occupant, and a fixing structure for the wheelchair. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention includes the subject matter described in the following paragraphs.

[0008] Item 1. Wheelchair body, A three-point seat belt device is provided on the wheelchair body, The wheelchair body includes a frame body supported by a pair of left and right front and rear wheels, and a seat body stretched over the frame body, The seat body includes a seat surface and a backrest sheet extending upward from a rear edge of the seat surface, and the back of the occupant is supported by the backrest sheet when the occupant is seated on the seat surface, The seat belt device of this wheelchair is capable of restraining an occupant while the occupant is seated on the seat by a shoulder belt portion extending in front of the occupant's shoulder and chest on one of the left or right sides, and a lap belt portion extending in front of the occupant's waist.

[0009] Clause 2. The seat belt device includes a belt, a retractor to which one end of the belt is connected and capable of winding up the belt, a belt anchor to which the other end of the belt is connected, a tongue having an insertion hole through which the belt is passed in a folded-back state and capable of sliding along the belt, a buckle to which the tongue can be detached, and a shoulder anchor having an insertion hole through which the belt is passed in a folded-back state at a position on the one end side of the tongue, the retractor, the belt anchor, the buckle, and the shoulder anchor are supported by the frame body, The retractor, the belt anchor, and the shoulder anchor are provided on one of the left and right sides of the wheelchair body, and the buckle is provided on the other of the left and right sides of the wheelchair body, When viewed from the front, the shoulder anchor is provided above a vertical center line of the backrest seat, the belt anchor is provided below a surface height of the seat cushion, and the buckle is supported by the frame body at a position below the surface height of the seat cushion, In a plan view, the shoulder anchor, the belt anchor, and the buckle are provided rearward of a front-rear center line of the seat cushion, Item 2. The wheelchair of item 1, wherein when the occupant is seated on the seat, the tongue is attached to the buckle, so that the shoulder belt portion formed by the portion of the belt between the shoulder anchor and the tongue extends in front of the shoulder and chest on one of the left and right sides of the occupant, and the lap belt portion formed by the portion of the belt between the belt anchor and the tongue extends in front of the waist of the occupant, thereby restraining the occupant.

[0010] Item 3. The frame body includes a pair of side frame bodies provided on one of the left and right sides and the other of the left and right sides, and a connecting frame body connecting the pair of side frame bodies, Each of the side frame bodies includes a main frame extending in the front-rear direction, a rear frame extending upward from the main frame, a seat frame extending forward from a first joint position midway through the rear frame and connecting the first joint position and a front end of the main frame, and an arm frame extending forward from a second joint position of the rear frame higher than the first joint position and connecting the second joint position and a third joint position midway through the seat frame and also connecting the third joint position and a fourth joint position midway through the main frame, The side edges of the seat cushion are attached to the rear portions of the seat frames between the first joint position and the third joint position of each of the side frame bodies, thereby tensioning the seat cushion, The side edges of the backrest sheet are attached to the portions of the back frame that are located above the first joint positions in the side frame bodies, thereby tensioning the backrest sheet, 3. The wheelchair according to item 1 or 2, wherein the connecting frame body includes a first connecting frame that connects the back frames included in the pair of side frame bodies.

[0011] Item 4. The connection frame body further includes a second connection frame and a third connection frame, The second connection frame connects the main frame provided on the side frame body arranged on one of the left and right sides and the seat frame provided on the side frame body arranged on the other left and right side, The wheelchair described in item 3, wherein the third connecting frame connects the seat frame provided on the side frame body arranged on one of the left and right sides and the main frame provided on the side frame body arranged on the other left and right side.

[0012] Item 5. The seat body further includes a headrest sheet arranged on the upper side of the backrest sheet, and the head of the occupant is supported by the headrest sheet when the occupant is seated on the seating seat, The back frame of each of the side frame bodies includes a shoulder frame extending upward from the main frame and a headrest frame extending upward from an upper end of the shoulder frame, the seat frame extends forward from the first joint position located midway along the shoulder frame to connect the first joint position and a front end of the main frame; the arm frame extends forward from the second joint position of the shoulder frame, which is located above the first joint position, to connect the second joint position and the third joint position located midway on the seat frame, and also connects the third joint position and a fourth joint position located midway on the main frame; The backrest sheet is tensioned by attaching a side edge of the backrest sheet to a portion of the shoulder frame that is located above the first joint position in each of the side frame bodies, The headrest sheet is tensioned by attaching a side edge of the headrest sheet to the headrest frame in each of the side frame bodies, 5. The wheelchair according to item 3 or 4, wherein the first connecting frame connects the shoulder frames or the headrest frames of the pair of side frame bodies.

[0013] Item 6. The frame body includes a pair of side frame bodies provided on one of the left and right sides and the other of the left and right sides, and a connecting frame body connecting the pair of side frame bodies, Each of the side frame bodies includes a main frame extending in the front-rear direction, a rear frame extending upward from the main frame, and an arm frame extending forward from a first joint position in the middle of the rear frame to connect the first joint position and a second joint position in the middle of the main frame, The side edge of the seat is attached to the rear part of the main frame between the back frame and the second joint position in each of the side frame bodies, thereby tensioning the seat, The backrest sheet is tensioned by attaching a side edge of the backrest sheet to the rear frame in each of the side frame bodies, 3. The wheelchair according to item 1 or 2, wherein the connecting frame body includes a first connecting frame that connects the back frames included in the pair of side frame bodies.

[0014] Item 7. The wheelchair according to item 6, wherein the connecting frame body further includes a second connecting frame that connects the main frames included in the pair of side frame bodies.

[0015] Item 8. The seat body further includes a headrest sheet arranged on the upper side of the backrest sheet, and the head of the occupant is supported by the headrest sheet when the occupant is seated on the seating seat, The back frame of each of the side frame bodies includes a shoulder frame extending upward from the main frame and a headrest frame extending upward from an upper end of the shoulder frame, the arm frame extends forward from the first joint position located midway along the shoulder frame to connect the first joint position and a second joint position located midway along the main frame; The backrest sheet is tensioned by attaching the side edges of the backrest sheet to the shoulder frames in each of the side frame bodies. The headrest sheet is tensioned by attaching a side edge of the headrest sheet to the headrest frame in each of the side frame bodies, The wheelchair according to item 6 or 7, wherein the first connecting frame connects the shoulder frames or the headrest frames of the pair of side frame bodies.

[0016] Item 9. A wheelchair according to any one of items 1 to 8, a fixing means for fixing the wheelchair when the wheelchair is placed in the vehicle interior, the fixing means includes a first fixing device, a second fixing device, a third fixing device, a fourth fixing device, a first fixing belt, a second fixing belt, a third fixing belt, and a fourth fixing belt; the first fixing device, the second fixing device, the third fixing device, and the fourth fixing device are provided on a floor surface of the vehicle compartment, When the wheelchair is disposed in the vehicle cabin, the first fixing device is located to the right of the left-right center line of the wheelchair body and forward of the rotation center line of the front wheels, the second fixing device is located to the left of the left-right center line of the wheelchair and forward of the rotation center line of the front wheels, the third fixing device is located to the right of the left-right center line of the wheelchair and rear of the rotation center line of the rear wheels, and the fourth fixing device is located to the left of the left-right center line of the wheelchair and rear of the rotation center line of the rear wheels, One end of the first fixing belt is connected to the first fixing device, and the other end of the first fixing belt is connected to a portion of the frame body that is to the right of the left-right center line of the wheelchair body and forward of the front-rear center line of the wheelchair body, One end of the second fixing belt is connected to the second fixing device, and the other end of the second fixing belt is fixed to a portion of the frame body that is to the left of the left-right center line of the wheelchair body and forward of the front-rear center line of the wheelchair body, One end of the third fixing belt is connected to the third fixing device, and the other end of the third fixing belt is connected to a portion of the frame body that is to the right of the left-right center line of the wheelchair body and to the rear of the front-rear center line of the wheelchair body, A wheelchair fixing structure in which one end of the fourth fixing belt is connected to the fourth fixing device, and the other end of the fourth fixing belt is connected to a part of the frame body that is to the left of the left-right center line of the wheelchair body and rear of the front-to-rear center line of the wheelchair body.

[0017] Item 10. The fixing means further includes a fifth fixing device, a sixth fixing device, a fifth fixing belt, and a sixth fixing belt; The fifth fixing device and the sixth fixing device are provided on a floor surface of the vehicle compartment, When the wheelchair is disposed in the vehicle cabin, the fifth fixing device is located to the right of the left-right center line of the wheelchair and rearward of the rotation center line of the rear wheels, and the sixth fixing device is located to the left of the left-right center line of the wheelchair and rearward of the rotation center line of the rear wheels, One end of the fifth fixing belt is connected to the fifth fixing device, and the other end of the fifth fixing belt is connected to a portion of the frame body that is to the left of the left-right center line of the wheelchair body and forward of the front-rear center line of the wheelchair body, Item 10. A wheelchair fixing structure as described in item 9, wherein one end of the sixth fixing belt is connected to the sixth fixing device, and the other end of the sixth fixing belt is connected to a portion of the frame body that is to the right of the left-right center line of the wheelchair body and forward of the front-rear center line of the wheelchair body.

[0018] Item 11. The wheelchair according to any one of items 3 to 8, The back frame of the pair of side frame bodies is located rearward of the front-rear center line of the wheelchair body, The fixing means further includes a seventh fixing belt and an eighth fixing belt, One end of the seventh fixing belt is connected to the third fixing device or the fifth fixing device, and the other end of the seventh fixing belt is connected to the back frame included in the side frame body arranged on the right side, Item 11. A wheelchair fixing structure as described in item 10, wherein one end of the eighth fixing belt is connected to the fourth fixing device or the sixth fixing device, and the other end of the eighth fixing belt is connected to the back frame provided on the side frame body arranged on the left side.

[0019] Item 12. A wheelchair for in-vehicle use, The wheelchair body, A fixing means for fixing the wheelchair body to a vehicle; a lap belt portion for holding an abdomen of an occupant of the wheelchair, the lap belt portion being provided on the wheelchair body, and a shoulder belt portion for holding a chest of the occupant, the shoulder belt portion being provided on the occupant's chest and extending to the abdomen of the occupant, the lap belt portion and the shoulder belt portion are provided in a manner and at a position that allows the occupant of the wheelchair to attach or detach them at his / her own will in the event of a collision accident; The wheelchair body is supported by a pair of left and right front and rear wheels, and includes a frame body and a seat body stretched over the frame body, the frame body includes a pair of side frame bodies provided on one of the left and right sides and the other of the left and right sides to withstand a front-rear impact in a vehicle collision, and a connecting frame body connecting the pair of side frame bodies to withstand a left-right impact in a vehicle collision, The seat body includes a seat cushion, a backrest, and a headrest. The backrest sheet extends upward from a rear edge of the seat sheet, and when the occupant is seated on the seat sheet, the back of the occupant is supported by the backrest sheet, The headrest seat is disposed above the backrest seat and is supported by the frame body to withstand a front-rear impact during a vehicle collision; When the occupant is seated in the seating seat, the head of the occupant is supported by the headrest sheet, The fixing means fixes the wheelchair body so that it does not shift in the left-right and front-rear directions when the wheelchair is placed in the vehicle compartment during a vehicle collision. Effect of the Invention

[0020] According to the present invention, the safety of the occupant can be improved by restraining the body of the occupant. [Brief description of the drawings]

[0021] [Figure 1] 1 is a perspective view showing a wheelchair according to a first embodiment of the present invention; [Diagram 2] FIG. 2 is a perspective view showing a frame body provided on the wheelchair according to the first embodiment of the present invention and a fixing means for fixing the wheelchair. [Diagram 3]1A is a front view showing a seat belt device, a seat cushion, and a backrest, and FIG.1B is a plan view showing the seat belt device, the seat cushion, and the backrest. [Figure 4] FIG. 11 is a perspective view showing a modified fixing means for fixing the wheelchair to the frame body provided on the wheelchair according to the first embodiment of the present invention. [Diagram 5] FIG. 11 is a perspective view showing a modified fixing means for fixing the wheelchair to the frame body provided on the wheelchair according to the first embodiment of the present invention. [Figure 6] FIG. 1 is a perspective view showing a modified wheelchair according to the first embodiment of the present invention. [Figure 7] FIG. 11 is a perspective view showing a frame body provided on a wheelchair of a modified example according to the first embodiment of the present invention and a fixing means for fixing the wheelchair. [Figure 8] FIG. 11 is a perspective view showing a wheelchair according to a second embodiment of the present invention. [Figure 9] FIG. 11 is a perspective view showing a frame body provided on a wheelchair according to a second embodiment of the present invention and a fixing means for fixing the wheelchair. [Figure 10] FIG. 11 is a perspective view showing a modified wheelchair according to the second embodiment of the present invention. [Figure 11] FIG. 11 is a perspective view showing a frame body provided on a modified wheelchair according to a second embodiment of the present invention and a fixing means for fixing the wheelchair. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Fig. 1 is a perspective view showing a wheelchair 1 according to a first embodiment of the present invention. Fig. 2 is a perspective view showing a frame body 7 provided on the wheelchair 1 according to the first embodiment of the present invention and a fixing means for fixing the wheelchair 1. In the following, the terms "front", "rear", "left" and "right" are used based on the occupant 2 riding on the wheelchair 1 (more specifically, the occupant 2 seated on a seat 9 described later).

[0023] A wheelchair 1 according to the first embodiment comprises a wheelchair body 3 and a three-point seat belt device 4 provided on the wheelchair body 3. The wheelchair body 3 comprises a frame body 7 (Fig. 2) supported by a pair of left and right front wheels 5, 5 and rear wheels 6, 6, and a seat body 8 (Fig. 1) stretched over the frame body 7. The seat body 8 comprises a seating surface 9, a backrest sheet 10 extending upward from the rear edge of the seating surface 9, and a footrest sheet 11. When an occupant 2 is seated on the seating surface 9, the back of the occupant 2 is supported by the backrest sheet 10, and the feet of the occupant 2 are supported by the footrest sheet 11. When the occupant 2 is seated in the seat cushion 9, the seat belt device 4 is capable of restraining the occupant 2 by means of a shoulder belt portion 12 extending in front of the occupant's 2 "shoulder on one of the left or right sides" and "chest" and a lap belt portion 13 extending in front of the occupant's 2 waist.

[0024] The frame body 7 (FIG. 2) comprises a pair of side frame bodies 20, 20 provided on one of the left and right sides and the other of the left and right sides, and a connecting frame body 21 connecting the pair of side frame bodies 20, 20. Although the drawings in this application show a case where "one of the left and right sides" corresponds to the "right side" and "the other of the left and right sides" corresponds to the "left side", the present invention also encompasses a case where "one of the left and right sides" corresponds to the "left side" and "the other of the left and right sides" corresponds to the "right side".

[0025] Each side frame body 20 has a main frame 22, a back frame 23, a seat frame 24, and an arm frame 25. The main frame 22 extends in the front-rear direction. The back frame 23 extends upward from the main frame 22 and is located rearward of a front-rear center line T1 of the wheelchair body 3. The front-rear center line T1 is a straight line that is equidistant from a rotation center line T2 of the front wheels 5, 5 and a rotation center line T3 of the rear wheels 6, 6 in a plan view. The seat frame 24 extends forward from a first joint position 26 located midway along the back frame 23, and connects the first joint position 26 to the front end of the main frame 22. The arm frame 25 extends forward from a second joint position 27 of the back frame 23, which is located above the first joint position 26, and connects the second joint position 27 to a third joint position 28 located midway through the seat frame 24, and also connects the third joint position 28 to a fourth joint position 29 located midway through the main frame 22. The front wheels 5 are attached, for example, to the front of the main frame 22. The rear wheels 6 are attached, for example, to the rear of the main frame 22 or to the lower part of the back frame 23.

[0026] In the wheelchair 1 according to the first embodiment, the seat 9 is tensioned by attaching a side edge of the seat sheet 9 to the rear part of the seat frame 24 between the first joint position 26 and the third joint position 28 in each side frame body 20. The backrest sheet 10 is tensioned by attaching a side edge of the backrest sheet 10 to a part of the back frame 23 located above the first joint position 26 in each side frame body 20. The footrest sheet 11 is tensioned by attaching a side edge of the footrest sheet 11 to a part of the seat frame 24 located forward of the third joint position 28 in each side frame body 20. The footrest sheet 11 is not necessarily required and may be omitted.

[0027] The connecting frame body 21 includes a first connecting frame 30, a second connecting frame 31, and a third connecting frame 32. The first connecting frame 30 connects the back frames 23, 23 of the pair of side frame bodies 20, 20. The second connecting frame 31 connects the main frame 22 of the side frame body 20 arranged on one of the left and right sides to the seat frame 24 of the side frame body 20 arranged on the other of the left and right sides. The third connecting frame 32 connects the seat frame 24 of the side frame body 20 arranged on one of the left and right sides to the main frame 22 of the side frame body 20 arranged on the other of the left and right sides.

[0028] The above-mentioned frames 22 to 25, 30 to 32 are formed of, for example, metal pipes, and the frames are connected to each other by, for example, welding.

[0029] Fig. 3(A) is a front view showing the seat belt device 4, the seat cushion 9, and the backrest 10. Fig. 3(B) is a plan view showing the seat belt device 4, the seat cushion 9, and the backrest 10.

[0030] The seat belt device 4 includes a belt 40, a retractor 41, a belt anchor 42, a tongue 43, a buckle 44, and a shoulder anchor 45. One end of the belt 40 is connected to the retractor 41, and the retractor 41 can take up the belt 40. The other end of the belt 40 is connected to the belt anchor 42. The tongue 43 has an insertion hole 43a through which the belt 40 passes in a folded-back state, and is slidable along the belt 40. The buckle 44 is detachable from the tongue 43, and has a button 44a (FIG. 3(B)) for removing the tongue 43 (FIGS. 1 and 3 show a state in which the tongue 43 is attached to the buckle 44). The shoulder anchor 45 has an insertion hole 45a through which the belt 40 passes in a folded-back state. The position of the belt 40 that is passed through the insertion hole 45a is a position on one end side (retractor 41 side) of the belt 40 relative to the tongue 43. The retractor 41, the belt anchor 42, the buckle 44, and the shoulder anchor 45 are supported by the frame body 7, and the retractor 41, the belt anchor 42, and the shoulder anchor 45 are provided on one of the left and right sides of the wheelchair body 3, and the buckle 44 is provided on the other of the left and right sides of the wheelchair body 3. The members of the frame body 7 that support the retractor 41, the belt anchor 42, the buckle 44, and the shoulder anchor 45 are not particularly limited, but the retractor 41, the belt anchor 42, and the shoulder anchor 45 are supported, for example, by the back frame 23 provided on the side frame body 20 on one of the left and right sides. The buckle 44 is supported, for example, by the back frame 23 provided on the side frame body 20 on the other of the left and right sides.

[0031] In a front view, the shoulder anchor 45 is provided above the vertical center line T4 of the backrest seat 10, the belt anchor 42 is provided below the surface height T5 of the seating surface 9, and the buckle 44 is supported by the frame body 7 at a position 44b below the surface height T5 of the seating surface 9. In the illustrated example, a pin penetrating the buckle 44 is provided at the position 44b of the buckle 44, and the buckle 44 is supported by the frame body 7 by connecting a portion of the pin extending from the buckle 44 to the frame body (e.g., the back frame 23). In a plan view, the shoulder anchor 45, the belt anchor 42, and the buckle 44 are provided rearward of the front-rear center line T6 of the seating surface 9. In order to enable the occupant to quickly escape in an emergency, it is preferable that the button 44a of the buckle 44 for removing the tongue 43 is located above the surface height T5 of the seating surface 9.

[0032] According to the above-mentioned seat belt device 4, when the occupant 2 is seated on the seat cushion 9, the tongue 43 is attached to the buckle 44, so that the shoulder belt portion 12 formed by the portion of the belt 40 between the shoulder anchor 45 and the tongue 43 extends forward of the "shoulder on one side" and "chest" of the occupant 2, and the lap belt portion 13 formed by the portion of the belt 40 between the belt anchor 42 and the tongue 43 extends forward of the waist of the occupant 2, thereby restraining the occupant 2.

[0033] Next, a fixing structure applied to fix the wheelchair 1 in the vehicle cabin will be described. The fixing structure includes the above-mentioned wheelchair 1 and a fixing means 50 (FIG. 2) for fixing the wheelchair 1 when the wheelchair 1 is placed in the vehicle cabin. The fixing means 50 includes a first fixing device 51, a second fixing device 52, a third fixing device 53, a fourth fixing device 54, a fifth fixing device 55, a sixth fixing device 56, a first fixing belt 57, a second fixing belt 58, a third fixing belt 59, a fourth fixing belt 60, a fifth fixing belt 61, a sixth fixing belt 62, a seventh fixing belt 63, and an eighth fixing belt 64.

[0034] The first fixture 51, the second fixture 52, the third fixture 53, the fourth fixture 54, the fifth fixture 55, and the sixth fixture 56 are provided on the floor surface of the vehicle interior. When the wheelchair 1 is arranged in the vehicle interior, the first fixture 51 is located to the right of the left-right center line T7 of the wheelchair body 3 and in front of the rotation center line T2 of the front wheels 5, 5, the second fixture 52 is located to the left of the left-right center line T7 and in front of the rotation center line T2, the third fixture 53 is located to the right of the left-right center line T7 and rear of the rotation center line T3 of the rear wheels 6, 6, the fourth fixture 54 is located to the left of the left-right center line T7 and rear of the rotation center line T3, the fifth fixture 55 is located to the right of the left-right center line T7 and rear of the rotation center line T3, and the sixth fixture 56 is located to the left of the left-right center line T7 and rear of the rotation center line T3. This state is achieved by adjusting the installation positions of the first to sixth fixing devices 51 to 56 on the floor surface of the vehicle compartment and the position of the wheelchair 1 when placing the wheelchair 1 in the vehicle compartment.

[0035] One end of the first fixing belt 57 is connected to the first fixing device 51. The other end of the first fixing belt 57 is connected to a portion of the frame body 7 located to the right of the left-right center line T7 of the wheelchair body 3 and forward of the front-rear center line T1 of the wheelchair body 3 (this portion of the frame body 7 is located rearward of the first fixing device 51).

[0036] One end of the second fixing belt 58 is connected to the second fixing device 52. The other end of the second fixing belt 58 is connected to a portion of the frame body 7 located to the left of the left-right center line T7 and forward of the front-rear center line T1 (this portion of the frame body 7 is located rearward of the second fixing device 52).

[0037] One end of the third fixing belt 59 is connected to the third fixing device 53. The other end of the third fixing belt 59 is connected to a portion of the frame body 7 located to the right of the left-right center line T7 and rear of the front-rear center line T1 (this portion of the frame body 7 is located forward of the third fixing device 53).

[0038] One end of the fourth fixing belt 60 is connected to the fourth fixing device 54. The other end of the fourth fixing belt 60 is connected to a portion of the frame body 7 located to the left of the left-right center line T7 and rear of the front-rear center line T1 (this portion of the frame body 7 is located forward of the fourth fixing device 54).

[0039] One end of the fifth fixing belt 61 is connected to the fifth fixing device 55. The other end of the fifth fixing belt 61 is connected to a portion of the frame body 7 located to the left of the left-right center line T7 and in front of the front-rear center line T1 (this portion of the frame body 7 is located in front of the fifth fixing device 55).

[0040] One end of the sixth fixing belt 62 is connected to the sixth fixing device 56. The other end of the sixth fixing belt 62 is connected to a portion of the frame body 7 located to the right of the left-right center line T7 and forward of the front-rear center line T1 (this portion of the frame body 7 is located forward of the sixth fixing device 56).

[0041] One end of the seventh fixing belt 63 is connected to the fifth fixing device 55. The other end of the seventh fixing belt 63 is connected to the back frame 23 included in the side frame body 20 arranged on the right side.

[0042] One end of the eighth fixing belt 64 is connected to the sixth fixing device 56. The other end of the eighth fixing belt 64 is connected to the back frame 23 included in the side frame body 20 arranged on the left side.

[0043] One end of each of the first to eighth fixing belts 57-64 can be connected to the above-mentioned fixture by, for example, engaging a hook provided at one end of each of the first to eighth fixing belts 57-64 with a ring constituting the above-mentioned fixture. The other end of each of the first to eighth fixing belts 57-64 can be connected to the frame body 7 by, for example, engaging a hook provided at the other end of each of the first to eighth fixing belts 57-64 with a ring provided on the frame body 7.

[0044] In the example shown in Figure 2, the first fixing device 51 and the third fixing device 53 are provided to the right of the front-to-rear straight line T8 that passes through the right end of the wheelchair body 3, the fifth fixing device 55 is provided between the straight line T8 and the left-to-right center line T7, the second fixing device 52 and the fourth fixing device 54 are provided to the left of the front-to-rear straight line T9 that passes through the left end of the wheelchair body 3, and the sixth fixing device 56 is provided between the straight line T9 and the left-to-right center line T7, but one or both of the first fixing device 51 and the third fixing device 53 may be provided between the straight line T8 and the left-to-right center line T7, the fifth fixing device 55 may be provided to the right of the straight line T8, one or both of the second fixing device 52 and the fourth fixing device 54 may be provided between the straight line T9 and the left-to-right center line T7, and the sixth fixing device 56 may be provided to the left of the straight line T9.

[0045] As shown in FIG. 4, one end of the seventh fixing belt 63 may be connected to the third fixing device 53, and one end of the eighth fixing belt 64 may be connected to the fourth fixing device .

[0046] 5, the third fixture 53 and the fifth fixture 55 may be formed by a single fixture, and the fourth fixture 54 and the sixth fixture 56 may be formed by a single fixture.

[0047] According to the wheelchair 1 of the first embodiment, the safety of the occupant 2 can be improved by restraining the body of the occupant 2 with the shoulder belt portion 12 and the lap belt portion 13. By restraining the occupant 2 in the wheelchair 1, it is possible to prevent the occupant 2 of the wheelchair 1 from being thrown out of the wheelchair 1 when the vehicle is involved in a traffic accident or when the emergency brakes are applied to the vehicle, and therefore it is possible to avoid injury to the occupant 2 of the wheelchair 1.

[0048] According to the wheelchair 1 of the first embodiment, when the seat back 10 receives an impact from the occupant 2 due to an accident or the like of the vehicle, the force applied to the back frame 23 can be transmitted to the seat frame 24 and the main frame 22 via the arm frame 25. Furthermore, the back frames 23, 23 of the pair of side frame bodies 20, 20 are connected to each other via the first connecting frame 30, so that when the seat back 10 receives an impact from the occupant 2, the force applied to the back frame 23 of one side frame body 20 can be transmitted to the other side frame body 20 via the first connecting frame 30. Therefore, the force applied to the seat back 10 can be borne by both side frame bodies 20, 20. For the above reasons, the wheelchair 1 has excellent impact resistance. Furthermore, in order to prevent the arms of the occupant 2 from being damaged by contact with the arm frame 25 when the vehicle is involved in an accident, etc., it is preferable that the arm frame 25 does not pass through "an area more than 250 mm forward of the boundary 14 (Figure 1) between the seat cushion 9 and the backrest seat 10, and more than 200 mm above the seat cushion 9."

[0049] In addition, according to the wheelchair 1 of the first embodiment, in addition to the first connecting frame 30 connecting the back frames 23, 23 of a pair of side frame bodies 20, 20, the second and third connecting frames 31, 32 connect the main frame 22 of one side frame body 20 and the seat frame 24 of the other side frame body 20, thereby improving the shape stability of the wheelchair body 3.

[0050] According to the fixing structure of the first embodiment, the frame body 7 is pulled forward by the first and second fixing belts 57, 58, and the frame body 7 is pulled backward by the third and fourth fixing belts 59, 60, thereby suppressing shifting of the wheelchair 1 in the forward / backward direction.

[0051] Furthermore, the left side portion of the frame body 7 is pulled to the right by the fifth fixing belt 61, and the right side portion of the frame body 7 is pulled to the left by the sixth fixing belt 62, so that shifting of the wheelchair 1 in the left-right direction can also be suppressed.

[0052] In addition, the left and right back frames 23, 23 are pulled by the seventh and eighth fixing belts 63, 64, so that the wheelchair 1 can be prevented from falling forward, for example, when a forward force is applied to the wheelchair 1 when the vehicle suddenly stops.

[0053] The wheelchair 1 according to the first embodiment can be modified as shown in Fig. 6. In the modified wheelchair 1 shown in Fig. 6, the seat body 8 includes, in addition to the seats 9, 10, and 11, a headrest seat 65 arranged above the backrest seat 10, and when the occupant 2 is seated on the seating seat 9, the head of the occupant 2 is supported by the headrest seat 65.

[0054] FIG. 7 is a perspective view showing a frame body 7 provided on the wheelchair 1 of the modified example shown in FIG.

[0055] In the wheelchair 1 of the modified example shown in FIG. 6, as shown in FIG. 7, the back frame 23 of each side frame body 20 includes a shoulder frame 23a extending upward from the main frame 22 and a headrest frame 23b extending upward from the upper end of the shoulder frame 23a. The headrest frame 23b is preferably detachably connected to the shoulder frame 23a. This connection is realized, for example, by fitting the lower part of the headrest frame 23b into a cavity in the upper part of the shoulder frame 23a, or by fitting the upper part of the shoulder frame 23a into a cavity in the lower part of the headrest frame 23b. In this case, when a passenger gets on, the frame 23b is connected to the frame 23a by fitting one of the frames 23b and 23a into the cavity of the other. When the passenger is not getting on, the frame 23b is removed from the frame 23a by removing one of the frames 23b and 23a from the cavity of the other.

[0056] The seat frame 24 provided on each side frame body 20 extends forward from a first joint position 26 located midway along the shoulder frame 23 a and connects the first joint position 26 with the front end of the main frame 22 .

[0057] The arm frame 25 provided on each side frame body 20 extends forward from a second joint position 27 of the shoulder frame 23a, which is above the first joint position 26, and connects the second joint position 27 to a third joint position 28 located midway through the seat frame 24, and also connects the third joint position 28 to a fourth joint position 29 located midway through the main frame 22.

[0058] The first connecting frame 30 included in the connecting frame body 21 connects the headrest frames 23b, 23b included in the pair of side frame bodies 20, 20 to each other.

[0059] In the modified wheelchair 1 shown in Fig. 6, the seat 9 is tensioned by attaching the side edges of the seat frame 24 to the rear part of the seat frame 24 between the first joint position 26 and the third joint position 28 in each side frame body 20. The backrest 10 is tensioned by attaching the side edges of the backrest 10 to the part of the shoulder frame 23a that is above the first joint position 26 in each side frame body 20.

[0060] Further, the side edges of the headrest sheet 65 are attached to the headrest frames 23b in each side frame body 20, so that the headrest sheet 65 is tensioned.

[0061] According to the wheelchair 1 of the above modification, the headrest seat 65 is provided, which is suitable for maintaining the posture of the occupant and can protect the head of the occupant 2 from rebound during a vehicle collision or rear-end collision.

[0062] In addition, the first connecting frame 30 connects the headrest frames 23b, 23b of the pair of side frame bodies 20, 20 together, so that when the seat back 10 receives an impact from the occupant 2, the force applied to the back frame 23 of one side frame body 20 can be transmitted to the other side frame body 20 via the first connecting frame 30. Therefore, the force applied to the seat back 10 can be borne by both side frame bodies 20, 20. The first connecting frame 30 may connect the shoulder frames 23a, 23a of the pair of side frame bodies 20, 20 together. Even in this case, the same effect as above can be obtained.

[0063] Next, a second embodiment of the present invention will be described. Below, differences from the first embodiment will be described, and configurations common to the first embodiment will be denoted by the same reference numerals as in the first embodiment.

[0064] FIG. 8 is a perspective view showing a wheelchair 68 according to a second embodiment of the present invention, and FIG. 9 is a perspective view showing a frame body 7 provided on a wheelchair body 3 of the wheelchair 68 according to the second embodiment.

[0065] The wheelchair 68 of the second embodiment, like the wheelchair 1 of the first embodiment, comprises a wheelchair body 3 and a three-point seat belt device 4 provided on the wheelchair body 3, but the structure of the frame body 7 provided on the wheelchair body 3 differs from that of the wheelchair 1 of the first embodiment.

[0066] In a wheelchair 68 according to the second embodiment, a frame body 7 includes a pair of side frame bodies 70, 70 provided on one left or right side and the other left or right side, and a connecting frame body 71 connecting the pair of side frame bodies 70, 70.

[0067] Each side frame body 70 has a main frame 72 extending in the front-to-rear direction, a rear frame 73 extending upward from the main frame 72, and an arm frame 76 extending forward from a first joint position 74 located halfway along the rear frame 73 and connecting the first joint position 74 with a second joint position 75 located halfway along the main frame 72.

[0068] The connecting frame body 71 includes a first connecting frame 77 and a second connecting frame 78. The first connecting frame 77 connects the back frames 73, 73 included in the pair of side frame bodies 70, 70. The second connecting frame 78 connects the main frames 72, 72 included in the pair of side frame bodies 70, 70.

[0069] The above-mentioned frames 72, 73, 76, 77, and 78 are formed of, for example, metal pipes, and the frames are connected to each other by, for example, welding.

[0070] In the wheelchair 68 according to the second embodiment, the seat 9 is tensioned by attaching a side edge of the seat 9 to the rear part of the main frame 72 between the back frame 73 and the second joint position 75 in each side frame body 70. Also, the backrest sheet 10 is tensioned by attaching a side edge of the backrest sheet 10 to the back frame 73 in each side frame body 70. Also, the footrest sheet 11 is tensioned by attaching a side edge of the footrest sheet 11 to the front part of the main frame 72 forward of the second joint position 75 in each side frame body 20. Note that the footrest sheet 11 is not necessarily required and may be omitted.

[0071] The retractor 41, belt anchor 42, and shoulder anchor 45 of the seat belt device 4 are supported, for example, by a back frame 73 provided on one of the left and right side frame bodies 70. The buckle 44 of the seat belt device 4 is supported, for example, by a back frame 73 provided on the other of the left and right side frame bodies 70. Note that the present invention does not limit the members supporting the retractor 41, belt anchor 42, buckle 44, and shoulder anchor 45 to the above-mentioned members.

[0072] When placing the wheelchair 68 according to the second embodiment in the vehicle cabin, the wheelchair 68 can be fixed using the fixing device 50 shown in the first embodiment, in the same way as the wheelchair 1 according to the first embodiment.

[0073] According to the wheelchair 68 of the second embodiment, the number of frames constituting the frame body 7 is small, so that the manufacturing costs can be kept low.

[0074] According to the wheelchair 68 of the second embodiment, when the backrest seat 10 receives an impact from the occupant 2 due to an accident or the like of the vehicle, the force applied to the back frame 73 can be transmitted to the main frame 72 via the arm frame 76. Furthermore, the back frames 73, 73 of the pair of side frame bodies 70, 70 are connected to each other via the first connecting frame 77, so that when the backrest seat 10 receives an impact from the occupant 2, the force applied to the back frame 73 of one side frame body 70 can be transmitted to the other side frame body 70 via the first connecting frame 77. Therefore, the force applied to the backrest seat 10 can be borne by both side frame bodies 70, 70. For the above reasons, the wheelchair 68 has excellent impact resistance. Furthermore, in order to prevent the arms of the occupant 2 from being damaged by contact with the arm frame 76 when the vehicle is involved in an accident, etc., it is preferable that the arm frame 76 does not pass through "an area more than 250 mm forward of the boundary 14 (Figure 8) between the seat cushion 9 and the backrest seat 10 and more than 200 mm above the seat cushion 9."

[0075] In addition, according to the wheelchair 68 of the second embodiment, the first connecting frame 77 connects the back frames 73, 73 of the pair of side frame bodies 70, 70, and the second connecting frame 78 connects the main frames 72, 72 of the pair of side frame bodies 70, 70, thereby improving the shape stability of the wheelchair body 3.

[0076] The wheelchair 68 according to the second embodiment can be modified as shown in Fig. 10. In the modified wheelchair 68 shown in Fig. 10, the seat body 8 is provided with, in addition to the seats 9, 10, 11, a headrest seat 65 arranged above the backrest seat 10, and the head of the occupant 2 is supported by the headrest seat 65 when the occupant 2 is seated on the seat 9.

[0077] FIG. 11 is a perspective view showing a frame body 7 provided on the modified wheelchair 68 shown in FIG.

[0078] In the wheelchair 68 of the modified example shown in FIG. 10, as shown in FIG. 11, the back frame 73 of each side frame body 70 includes a shoulder frame 73a extending upward from the main frame 72 and a headrest frame 73b extending upward from the upper end of the shoulder frame 73a. The headrest frame 73b is preferably detachably connected to the shoulder frame 73a. This connection is realized, for example, by fitting the lower part of the headrest frame 73b into a cavity in the upper part of the shoulder frame 73a, or by fitting the upper part of the shoulder frame 73a into a cavity in the lower part of the headrest frame 73b. In this case, when a passenger gets on, the frame 73b is connected to the frame 73a by fitting one of the frames 73b and 73a into the cavity of the other. When the passenger is not getting on, the frame 73b is removed from the frame 73a by removing one of the frames 73b and 73a from the cavity of the other.

[0079] The arm frame 76 provided on each side frame body 70 extends forward from a first joint position 74 located midway along the shoulder frame 73 a and connects the first joint position 74 with a second joint position 75 located midway along the main frame 72 .

[0080] The first connecting frame 77 connects the headrest frames 73b, 73b included in the pair of side frame bodies 70, 70 to each other.

[0081] In a modified wheelchair 68 shown in Fig. 10, the seat 9 is tensioned by attaching a side edge of the seat cushion 9 to the rear of the main frame 72 between the back frame 73 and the second joint position 75 in each side frame body 70. The backrest 10 is tensioned by attaching a side edge of the backrest 10 to the shoulder frame 73a in each side frame body 70. The headrest 65 is tensioned by attaching a side edge of the headrest 65 to the headrest frame 73b in each side frame body 70.

[0082] According to the modified wheelchair 68 described above, the headrest seat 65 is provided, which is suitable for maintaining the posture of the occupant and can protect the head of the occupant 2 from rebound force in the event of a vehicle collision or rear-end collision.

[0083] Furthermore, by connecting the headrest frames 73b, 73b of the pair of side frame bodies 70, 70 together via the first connecting frame 77, when the seat back 10 receives an impact from the occupant 2, the force applied to the back frame 73 of one side frame body 70 can be transmitted to the other side frame body 70 via the first connecting frame 77. Therefore, the force applied to the seat back 10 can be borne by both side frame bodies 70, 70. The first connecting frame 77 may also connect the shoulder frames 73a, 73a of the pair of side frame bodies 70, 70 together. In this case as well, the same effect as above can be obtained.

[0084] In the above examples, specific structural examples of the wheelchair of the present invention are shown, but the wheelchair of the present invention is not limited to the structural examples. In order to realize the purpose of increasing the safety of the occupant by being able to restrain the body of the occupant (especially to prevent serious accidents involving wheelchair occupants mounted on vehicles), the wheelchair of the present invention is A wheelchair for in-vehicle use, The wheelchair body, A fixing means for fixing the wheelchair body to a vehicle; a lap belt portion for holding an abdomen of an occupant of the wheelchair, the lap belt portion being provided on the wheelchair body, and a shoulder belt portion for holding a chest of the occupant, the shoulder belt portion being provided on the occupant's chest and extending to the abdomen of the occupant, the lap belt portion and the shoulder belt portion are provided in a manner and at a position that allows the occupant of the wheelchair to attach or detach them at his / her own will in the event of a collision accident; The wheelchair body is supported by a pair of left and right front and rear wheels, and includes a frame body and a seat body stretched over the frame body, the frame body includes a pair of side frame bodies provided on one of the left and right sides and the other of the left and right sides to withstand a front-rear impact in a vehicle collision, and a connecting frame body connecting the pair of side frame bodies to withstand a left-right impact in a vehicle collision, The seat body includes a seat cushion, a backrest, and a headrest. The backrest sheet extends upward from a rear edge of the seat sheet, and when the occupant is seated on the seat sheet, the back of the occupant is supported by the backrest sheet, The headrest seat is disposed above the backrest seat and is supported by the frame body to withstand a front-rear impact during a vehicle collision; When the occupant is seated in the seating seat, the head of the occupant is supported by the headrest sheet, The fixing means may be a wheelchair that fixes the wheelchair body so that it does not shift left / right or front / rear in the event of a vehicle collision when the wheelchair is placed in the vehicle compartment. [Explanation of symbols]

[0085] 1. Wheelchair 2 Crew 3 Wheelchair body 4 Seat belt device 5 Front wheel 6 Rear wheel 7 Frame body 8 Sheet body 9 Seat 10 Backrest seat 12 Shoulder belt section 13 Lap belt section 20,70 Side frame body 21,71 Connecting frame body 22,72 Mainframe 23,73 Rear frame 23a,73a Shoulder frame 23b,73b Headrest frame 24 Seat frame 25,76 Arm Frame 26,74 First node position 27,75 Second node position 28 Third node position 29 Fourth section position 30,77 First connecting frame 31,78 Second connecting frame 32 Third connecting frame 40 Belt 41 Retractor 42 Belt anchor 43 Tongue 44 Buckle 45 Shoulder Anchor 50 Fixing means 51 First fixture 52 Second fixture 53 Third fixture 54 Fourth fixture 55 Fifth fixture 56 Sixth fixture 57 First Fixed Belt 58 Second fixing belt 59 Third Fixation Belt 60 Fourth Fixation Belt 61 Fifth Fixation Belt 62 Sixth Fixation Belt 63 Seventh Fixation Belt 64 Eighth Fixation Belt 65 Headrest seat T1 Center line of wheelchair body T2 Front wheel rotation center line T3 Rear wheel rotation center line T4 Center line of seat back T5 Seat surface height T6 Center line of seat T7 Wheelchair body center line

Claims

1. The wheelchair body, a three-point seat belt device provided on the wheelchair body, The wheelchair body includes a frame body supported by a pair of left and right front and rear wheels, and a seat body stretched over the frame body, The seat body includes a seat surface and a backrest sheet extending upward from a rear edge of the seat surface, and the back of the occupant is supported by the backrest sheet when the occupant is seated on the seat surface, The seat belt device of this wheelchair is capable of restraining an occupant while the occupant is seated on the seat by a shoulder belt portion extending in front of the occupant's shoulder and chest on one of the left or right sides, and a lap belt portion extending in front of the occupant's waist.

2. the seat belt device includes a belt, a retractor to which one end of the belt is connected and capable of winding up the belt, a belt anchor to which the other end of the belt is connected, a tongue having an insertion hole through which the belt is passed in a folded-back state and capable of sliding along the belt, a buckle to which the tongue can be detached, and a shoulder anchor having an insertion hole through which the belt is passed in a folded-back state at a position closer to one end of the belt than the tongue, the retractor, the belt anchor, the buckle, and the shoulder anchor are supported by the frame body, The retractor, the belt anchor, and the shoulder anchor are provided on one of the left and right sides of the wheelchair body, and the buckle is provided on the other of the left and right sides of the wheelchair body, When viewed from the front, the shoulder anchor is provided above a vertical center line of the backrest seat, the belt anchor is provided below a surface height of the seat cushion, and the buckle is supported by the frame body at a position below the surface height of the seat cushion, In a plan view, the shoulder anchor, the belt anchor, and the buckle are provided rearward of a front-rear center line of the seat cushion, 2. The wheelchair of claim 1, wherein when the occupant is seated on the seat, the tongue is attached to the buckle, so that the shoulder belt portion formed by the portion of the belt between the shoulder anchor and the tongue extends in front of the shoulder and chest on one of the left and right sides of the occupant, and the lap belt portion formed by the portion of the belt between the belt anchor and the tongue extends in front of the waist of the occupant, thereby restraining the occupant.

3. The frame body includes a pair of side frame bodies provided on one of the left and right sides and the other of the left and right sides, and a connecting frame body connecting the pair of side frame bodies, Each of the side frame bodies includes a main frame extending in the front-rear direction, a rear frame extending upward from the main frame, a seat frame extending forward from a first joint position midway through the rear frame and connecting the first joint position and a front end of the main frame, and an arm frame extending forward from a second joint position of the rear frame higher than the first joint position and connecting the second joint position and a third joint position midway through the seat frame and also connecting the third joint position and a fourth joint position midway through the main frame, The side edges of the seat cushion are attached to the rear portions of the seat frames between the first joint position and the third joint position of each of the side frame bodies, thereby tensioning the seat cushion, The side edges of the backrest sheet are attached to the portions of the back frame that are located above the first joint positions in the side frame bodies, thereby tensioning the backrest sheet, The wheelchair according to claim 1 , wherein the connecting frame body includes a first connecting frame that connects the back frames included in the pair of side frame bodies.

4. The connecting frame body further includes a second connecting frame and a third connecting frame, The second connection frame connects the main frame provided on the side frame body arranged on one of the left and right sides and the seat frame provided on the side frame body arranged on the other left and right side, The wheelchair according to claim 3 , wherein the third connecting frame connects the seat frame provided on the side frame body arranged on one of the left and right sides to the main frame provided on the side frame body arranged on the other of the left and right sides.

5. The seat body further includes a headrest sheet disposed above the backrest sheet, and the head of the occupant is supported by the headrest sheet when the occupant is seated on the seating seat, The back frame of each of the side frame bodies includes a shoulder frame extending upward from the main frame and a headrest frame extending upward from an upper end of the shoulder frame, the seat frame extends forward from the first joint position located midway along the shoulder frame to connect the first joint position and a front end of the main frame; the arm frame extends forward from the second joint position of the shoulder frame, which is located above the first joint position, to connect the second joint position and the third joint position located midway on the seat frame, and also connects the third joint position and a fourth joint position located midway on the main frame; The backrest sheet is tensioned by attaching a side edge of the backrest sheet to a portion of the shoulder frame that is located above the first joint position in each of the side frame bodies, The headrest sheet is tensioned by attaching a side edge of the headrest sheet to the headrest frame in each of the side frame bodies, The wheelchair according to claim 3 , wherein the first connecting frame connects the shoulder frames or the headrest frames of the pair of side frame bodies.

6. The frame body includes a pair of side frame bodies provided on one of the left and right sides and the other of the left and right sides, and a connecting frame body connecting the pair of side frame bodies, Each of the side frame bodies includes a main frame extending in the front-rear direction, a rear frame extending upward from the main frame, and an arm frame extending forward from a first joint position in the middle of the rear frame to connect the first joint position and a second joint position in the middle of the main frame, The side edge of the seat is attached to the rear part of the main frame between the back frame and the second joint position in each of the side frame bodies, thereby tensioning the seat, The backrest sheet is tensioned by attaching a side edge of the backrest sheet to the rear frame in each of the side frame bodies, The wheelchair according to claim 1 , wherein the connecting frame body includes a first connecting frame that connects the back frames included in the pair of side frame bodies.

7. The wheelchair according to claim 6, wherein the connecting frame body further includes a second connecting frame that connects the main frames included in the pair of side frame bodies.

8. The seat body further includes a headrest sheet disposed above the backrest sheet, and the head of the occupant is supported by the headrest sheet when the occupant is seated on the seating seat, The back frame of each of the side frame bodies includes a shoulder frame extending upward from the main frame and a headrest frame extending upward from an upper end of the shoulder frame, the arm frame extends forward from the first joint position located midway along the shoulder frame to connect the first joint position and a second joint position located midway along the main frame; The backrest sheet is tensioned by attaching the side edges of the backrest sheet to the shoulder frames in each of the side frame bodies. The headrest sheet is tensioned by attaching a side edge of the headrest sheet to the headrest frame in each of the side frame bodies, The wheelchair according to claim 6 , wherein the first connecting frame connects the shoulder frames or the headrest frames of the pair of side frame bodies.

9. A wheelchair according to any one of claims 1 to 8; a fixing means for fixing the wheelchair when the wheelchair is placed in the vehicle interior, the fixing means includes a first fixing device, a second fixing device, a third fixing device, a fourth fixing device, a first fixing belt, a second fixing belt, a third fixing belt, and a fourth fixing belt; the first fixing device, the second fixing device, the third fixing device, and the fourth fixing device are provided on a floor surface of the vehicle compartment, When the wheelchair is disposed in the vehicle cabin, the first fixing device is located to the right of the left-right center line of the wheelchair body and forward of the rotation center line of the front wheels, the second fixing device is located to the left of the left-right center line of the wheelchair and forward of the rotation center line of the front wheels, the third fixing device is located to the right of the left-right center line of the wheelchair and rear of the rotation center line of the rear wheels, and the fourth fixing device is located to the left of the left-right center line of the wheelchair and rear of the rotation center line of the rear wheels, One end of the first fixing belt is connected to the first fixing device, and the other end of the first fixing belt is connected to a portion of the frame body that is to the right of the left-right center line of the wheelchair body and forward of the front-rear center line of the wheelchair body, One end of the second fixing belt is connected to the second fixing device, and the other end of the second fixing belt is fixed to a portion of the frame body that is to the left of the left-right center line of the wheelchair body and forward of the front-rear center line of the wheelchair body, One end of the third fixing belt is connected to the third fixing device, and the other end of the third fixing belt is connected to a portion of the frame body that is to the right of the left-right center line of the wheelchair body and to the rear of the front-rear center line of the wheelchair body, A wheelchair fixing structure in which one end of the fourth fixing belt is connected to the fourth fixing device, and the other end of the fourth fixing belt is connected to a part of the frame body that is to the left of the left-right center line of the wheelchair body and rear of the front-to-rear center line of the wheelchair body.

10. The fixing means further includes a fifth fixing device, a sixth fixing device, a fifth fixing belt, and a sixth fixing belt; The fifth fixing device and the sixth fixing device are provided on a floor surface of the vehicle compartment, When the wheelchair is disposed in the vehicle cabin, the fifth fixing device is located to the right of the left-right center line of the wheelchair and rearward of the rotation center line of the rear wheels, and the sixth fixing device is located to the left of the left-right center line of the wheelchair and rearward of the rotation center line of the rear wheels, One end of the fifth fixing belt is connected to the fifth fixing device, and the other end of the fifth fixing belt is connected to a portion of the frame body that is to the left of the left-right center line of the wheelchair body and forward of the front-rear center line of the wheelchair body, 10. The wheelchair fixing structure of claim 9, wherein one end of the sixth fixing belt is connected to the sixth fixing device, and the other end of the sixth fixing belt is connected to a portion of the frame body that is to the right of the left-right center line of the wheelchair body and forward of the front-to-rear center line of the wheelchair body.

11. The wheelchair is a wheelchair according to any one of claims 3 to 8, The back frame of the pair of side frame bodies is located rearward of the front-rear center line of the wheelchair body, The fixing means further includes a seventh fixing belt and an eighth fixing belt, One end of the seventh fixing belt is connected to the third fixing device or the fifth fixing device, and the other end of the seventh fixing belt is connected to the back frame included in the side frame body arranged on the right side, The wheelchair fixing structure of claim 10, wherein one end of the eighth fixing belt is connected to the fourth fixing device or the sixth fixing device, and the other end of the eighth fixing belt is connected to the back frame provided on the side frame body arranged on the left side.

12. A wheelchair for in-vehicle use, The wheelchair body, A fixing means for fixing the wheelchair body to a vehicle; a lap belt portion for holding an abdomen of an occupant of the wheelchair, the lap belt portion being provided on the wheelchair body, and a shoulder belt portion for holding a chest of the occupant, the shoulder belt portion being provided on the occupant's chest and extending to the abdomen of the occupant, the lap belt portion and the shoulder belt portion are provided in a manner and at a position that allows the occupant of the wheelchair to attach or detach them at his / her own will in the event of a collision accident; The wheelchair body is supported by a pair of left and right front and rear wheels, and includes a frame body and a seat body stretched over the frame body, the frame body includes a pair of side frame bodies provided on one of the left and right sides and the other of the left and right sides to withstand a front-rear impact in a vehicle collision, and a connecting frame body connecting the pair of side frame bodies to withstand a left-right impact in a vehicle collision, The seat body includes a seat cushion, a backrest, and a headrest. The backrest sheet extends upward from a rear edge of the seat sheet, and when the occupant is seated on the seat sheet, the back of the occupant is supported by the backrest sheet, The headrest seat is disposed above the backrest seat and is supported by the frame body to withstand a front-rear impact during a vehicle collision; When the occupant is seated in the seating seat, the head of the occupant is supported by the headrest sheet, The fixing means fixes the wheelchair body so that it does not shift in the left-right and front-rear directions when the wheelchair is placed in the vehicle compartment during a vehicle collision.

Images