JP2008043381A - Folding wheelchair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a wheelchair body from getting deformed during driving by increasing the rigidity of the wheelchair body. <P>SOLUTION: A seat surface is attached to a frame to give rigidity to the seat surface separately from the wheelchair body, and the rear frame of the seat surface is inserted and fixed into the body frame behind a backrest. When a rider sits on the front of the seat surface, his weight is applied to the cross member of the body through a frame on the underside of the front of the seat surface, fixing the body's cross member and frame, and increases the overall rigidity of the wheelchair. Since deformation during driving is reduced with driving efficiency improved, fatigue due to riding for many hours can be reduced. Since a carer can push the wheelchair by one push hand, the care can walk side by side with the wheelchair rider and can have a friendly conversation. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a folding wheelchair mainly used by elderly people and physically disabled people.

In general, a folding wheelchair is apt to be fatigued because the vehicle body is distorted and the driving force is lost when the occupant is driven by hand. In addition, when the assistant pushes the vehicle, if it is pushed with the handle on one side, the vehicle body is twisted, so that it is difficult to go straight. By improving the vehicle body rigidity of the wheelchair, the vehicle body can be prevented from being distorted, so that the loss of driving force is reduced and the assistant can also press the handle with the handle on one side. As a measure to reduce fatigue caused by long-term riding, there is a proposal to reduce vibration during traveling in the conventional plan.
JP2004-242895

  The problem to be solved is to increase the rigidity of the vehicle body in order to reduce the fatigue of wheelchair passengers. That is, when the driving wheel is operated even when the road surface condition is good, the driving force is lost due to the distortion of the vehicle body, and the vehicle body rigidity is increased in order to improve the problem that the occupant is likely to get tired.

  According to the present invention, a frame protrudes from the left and right rear portions of the seating surface of the frame-equipped seating surface which is separate from the body of the folding wheelchair, and is inserted and fixed to a holding portion provided on the body frame. On the other hand, the front part of the seating surface has a main feature that the frame that crosses the lower part of the front part of the seating frame is placed on the vehicle body cross member, and the weight on the seat surface is fixed by fixing the body frame and the vehicle body cross member. Features.

  Since the deformation of the car body when driving a wheelchair is greatly reduced, the useless force used to distort the car body is eliminated. In addition, straightness is ensured because the assistant is not distorted even if the assistant is pushed alongside the occupant with the handle on one side. That is, fatigue when the occupant is driven by himself / herself can be reduced, and parallel walking can be performed when an assistant is present.

  As described above, it is important that the folding wheelchair is lightweight, and the present plan that can ensure the rigidity of the vehicle body that is not distorted during driving exhibits the best effect when applied to the folding wheelchair.

  FIG. 1 is a top view of a conventional folding wheelchair. FIG. 2 is an explanatory view of load distribution according to the weight of the occupant of the seat surface portion of the conventional folding wheelchair. Reference numeral 1 denotes a seating surface that is stretched on the vehicle body cross member 5. The occupant's weight is applied to the vehicle body cross member 5, and the vehicle body cross member 5 receives the occupant's weight in a distributed manner on the rear receiver 3 and the front receiver 2 of the vehicle body frame 4. It is united. As shown in FIG. 2, the load distribution of the receiving parts 3 and 2 to the vehicle body frame 4 is about 6/7 for the rear receiving part 3 and about 1/7 for the front receiving part 2, and the load on the front part. Since the fixing force of the front receiving part is small, the vehicle body is insufficiently rigid and easily distorted during driving, resulting in a loss of driving force.

  FIG. 3 is a top view of the folding wheelchair according to the embodiment of the present invention, and FIG. 4 is an enlarged view of the seat portion of the embodiment of the present invention. FIG. 5 is an explanatory view of load distribution according to the weight of the occupant of the seat surface portion of the present invention. 3, 4, and 5, reference numeral 11 denotes a seat with a frame that is separate from the body frame and can be removed. The rear frame 12 of the 11 seating surfaces protrudes rearward from the seating surface and is inserted into the holding portion 15 provided on the vehicle body frame 14 from the front. The holding part 15 is provided at least in the vehicle body frame part behind the backrest frame 20. On the other hand, the front frame 13 of the 11 seating surfaces is exposed to the lower side, and is placed on the stopper 17 of the vehicle body cross member 16, and 17 is a stopper for preventing the 11 seating surfaces from moving forward. The 16 vehicle body cross members are fixed to the vehicle body frame front vehicle body cross member receiver 18 and the vehicle body frame rear vehicle body cross member receiver 19 by the frame-equipped seating surface 11 with the weight of the occupant. The load distribution between the holding portion 15 of the vehicle body frame 14 and the vehicle body frame front cross member receiving portion 18 is fixed to the 11 frame-attached seat rear surface frame 12 and the vehicle body frame rear seat surface holding portion 15 by insertion. Therefore, about 2/3 is applied to the receiving part 15 and the load to the rear receiving part 19 is hardly applied, and about 1/3 of the weight is applied to the front receiving part 18, and the vehicle body cross member is the vehicle body frame. To increase the rigidity of the entire vehicle body.

  The present invention is integrated with the body frame at the rear part of the seat surface with the frame, and the front part is fixed by pressing the body frame and the body cross member from above with the weight of the occupant, increasing the rigidity of the whole wheelchair, and distortion of the body. Since the driving force is reduced, most of the driving force can be used as a driving force, and the tiredness is less likely to occur even when riding for a long time.

  As described above, according to the present invention, the seat surface of the folding wheelchair is provided with a frame, the seat surface is provided with rigidity, is separated from the vehicle body, the rear surface of the seat surface is incorporated into the vehicle body behind the backrest, and the front surface of the seat surface Is placed on the vehicle body cross member, and the rider sits down to ensure the rigidity of the whole wheelchair. Compared to conventional folding wheelchairs, the vehicle body distortion that occurs during driving can be greatly reduced, so there is little loss of driving force and the occupant's fatigue can be reduced with a slight increase in weight of the seat frame material. Thus, the vehicle body rigidity can be improved, and it is possible to provide not only a manual folding wheelchair having improved driving efficiency and excellent straightness but also an electric folding wheelchair.

It is upper surface explanatory drawing of the conventional folding wheelchair. It is vehicle body cross member part load explanatory drawing by the weight of the conventional folding wheelchair. It is upper surface explanatory drawing of the folding type wheelchair of this invention. It is a seat surface part expansion explanatory drawing of the folding type wheelchair of this invention. (Example) It is vehicle body cross member part load explanatory drawing by the weight of the folding wheelchair of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat surface sheet 2 Car body frame front cross member receiver 3 Car body frame rear cross member receiver 4 Car body frame 5 Car body cross member 11 Seat surface with frame 12 Seat surface rear frame with frame 13 Seat surface front frame with frame 14 Car body frame 15 Car body frame rear seat holding part 16 Car body cross member 17 Car body cross member front stopper 18 Car body frame front cross member receiver 19 Car body frame rear cross member receiver 20 Backrest frame

Claims (2)

In order to improve the vehicle body rigidity of the folding wheelchair, the frame protruding from the rear of the seat surface of the separate seat surface with a frame composed of a linear structure material is inserted and fixed to the holding portion provided in the frame on the vehicle body side, Folding frame is characterized in that a frame that crosses the lower part of the seat front of the separate seating surface is placed on the vehicle body cross member, and the vehicle body cross member is provided with a stopper that prevents the seat surface from moving forward. wheelchair. The folding wheelchair according to claim 1, wherein the position of the holding portion provided on the vehicle body frame for inserting the frame protruding to the rear portion of the seating surface is located behind the backrest.

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