Theoretical study of breaking system and disposition of handgrip and basket of four-wheeled walker for step mounting and dismounting

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  • Takanokura Masato
    Department of Information Systems Creation, Faculty of Engineering, Kanagawa University

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  • 昇段・降段動作を考慮した歩行補助車の制動装置およびハンドグリップとカゴの配置に関する理論的研究
  • ショウダン コウダン ドウサ オ コウリョシタ ホコウ ホジョシャ ノ セイドウ ソウチ オヨビ ハンドグリップ ト カゴ ハイチ ニ カンスル リロンテキ ケンキュウ

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The force that a user applies to a handgrip of a four-wheeled walker for step mounting and dismounting is estimated by a theoretical model derived from the equilibrium of the force and the moment in the sagittal plane. Effects of a breaking system and a position of a handgrip or a basket on the force estimated from the model are analyzed. If the breaking system can be used, the user operates the wheels easily only by the horizontal force applied to the handgrip anywhere the handgrip is positioned. If the breaking system cannot be used, it is impossible or difficult for the user to operate the wheels. The walker should be provided with a function that the user can use adequately the breaking system such as a handbrake during step mounting and dismounting. The force that the user applies to the handgrip depends on the horizontal position of the basket and not on the height. The basket should be positioned in the middle between the front and the rear wheels for the gravitational force of the baggage to be distributed evenly to the four wheels.

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