The purposes of this study were to develop the Sport-typed Wheel-chair which could drive Straight using either one-handed or both-handed operation and to evaluate this wheel-chair. To perform these purposes, a wheelchair which had two handrims on one side to get to behind both wheels simultaneously by one hand. To be transmitted to the driving force from the handrims side to opposite side wheel, the driving force transmitted axis (DFT) made by author's laboratory was adopted. DFT consisted on three axes, because the sport-typed wheel-chair had the chamber angle. Each axis was combined using universal joint in order to be transmitted the driving force between each chamber. Each chamber angle was set on 16ﾟ. The evaluation results of this wheelchair were summarized as follows; Load in driving this wheelchair by one handed operation was almost close to that by both handed operation from point of EMG. The relationship between the wheel position of the specific in wheelchair and the driving force had the large individual equation in case of the wheelchair by one handed operation. The maximum driving force of driver in operation by one handed operation was almost 100N. The torque loaded to the DFT was estimated to almost 37.5M･m. Furthermore, the shearing stress against DFT was calculated to almost 24MP and this stress was thought to be cause of the DFT rupture.

DESCENTE SPORTS SCIENCE Vol.33/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE