PROBLEM TO BE SOLVED: To provide a position control mechanism whose structure can be simplified and which can improve moving operability of a wheelchair travelling on a road surface inclining sideways.SOLUTION: The position control mechanism 10 controls the inclined position of the wheelchair 100 so that it may be horizontal on the road surface inclining sideways rightward or leftward with respect to the direction of its travel. The mechanism 10 includes: a tilt angle sensor 11 which detects the road surface inclining sideways and a wheel up-and-down moving mechanism 12 which moves wheels 120 of the wheelchair 100 up and down on the basis of the tilt angle detected by the tilt angle sensor 11. The mechanism 10 is provided with: a motor 13a which is the power of moving the wheels 120 up and down several trapezoidal threads 13b which rotate along with driving of the motor 13a and a moving plate 13d which connects the trapezoidal threads 13b and moves up and down along with the rotation of the trapezoidal threads 13b in an up-and-down moving base 13 which is arranged in either one of the right and left frames 110 of the wheelchair 100.COPYRIGHT: (C)2013,JPO&INPIT【課題】構造を簡単化し、横傾斜路面を走行する車椅子の移動操作性を向上することが可能な姿勢制御機構を提供することを目的とする。【解決手段】車椅子100の進行方向に対して左側または右側へ傾斜する横傾斜路面における傾斜姿勢を水平に制御する姿勢制御機構10であって、横傾斜路面を検出する傾斜角検出センサ11と、傾斜角検出センサ11の傾斜角を基に車椅子100の車輪120を上下作動する車輪上下作動機構12とで構成しており、車椅子100の左側または右側の何れか一方のフレーム110に設けられる上下作動ベース13内部に、車輪120を上下作動するための動力となるモータ13aと、モータ13aの駆動に伴い回転する複数の台形ネジ13bと、台形ネジ13bを連結し台形ネジ13bの回転に伴って上下に移動する移動プレート13dを備える。【選択図】図2
