把手を押す作業における足のはたらき
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概要
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1) The strength of the right hand was measured by the strain gauge dynamometer, the knob of which was pushed with right hand by female subjects in standing posture. During the experimental work photographs of feet of the subjects were taken by which the coordination of the feet was studied. The physical surroundings of the feet of the subjects were found to have definite incluences on the performance of pushing a knob horizontally to the left by an arm. The performance of the subjects with bare feet was the greatest notwithstanding the materials of flooring, while the output of the subjects with stockings was definitely modified by the difference of the flooring materials. 2) Placing the knob in front of the right shoulder and pushing it to the left by the right hand with extended arm, the metatarsus and toes of the right foot were pressed. Placing the knob in front of the left shoulder and pushing it in the same way, the metatarsus and toes of both feet were pressed. Placing the knob at the right side of the right shoulder, pushing induced the load in both heels. Pushing the knob upwards increased the load at the foot of the same side as the knob. Pushing it down alleviated the load at the foot of the same side as the knob and increased the load at the opposite side. 3) At the beginning of the act of pushing the knob horizontally to the left, all subjects turned their toes out and put them as before at the end of pushing. Subject who turned their toes at will, made better performances than the subjects with restricted position of toes.
- 社団法人日本産業衛生学会の論文