PROBLEM TO BE SOLVED: To prevent a wheelchair body from getting deformed during driving by increasing the rigidity of the wheelchair body.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 bodys 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.COPYRIGHT: (C)2008,JPO&INPIT【課題】折りたたみ式車いすの、車体剛性を高めて、駆動時に車体が歪むことを防止する。【解決手段】座面に剛性をもたせるために、車体とは別体にしてフレーム付とし、座面の後部フレームを車体フレームにバックレストより後方で挿入固定する。座面前部は乗員が着座することによって、体重が座面前部下側のフレームを通して車体クロスメンバーに掛かり、車体クロスメンバーと車体フレームが固定され、車いす全体の剛性を高める。駆動時の歪みを減少し、駆動効率が向上するため、長時間の乗車でも疲労を軽減できる他、介助者が片側の押し手で押せるため、並列歩行ができ、より親密なコミュニケーションが図れる。【選択図】 図4