主観的評価に基づく踏面・蹴上寸法の検討 : 階段の安全性からみた踏面・蹴上寸法の評価に関する研究 その3
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概要
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Pedestrians are liable to have accidents while descending stairs, because of unsuitable dimensions in the tread and rise. The dimensions of tread and rise are considered to be evaluated by pedestrians themselves. In this paper, the sensory tests for difficulty in descending stairs were applied to evaluate many combinations of tread and rise. The results of sensory tests were quantified by one of the psychometric methods, specifically the method of successive categories. Ten young males (average ages 21.0), ten young females (19.7) and ten male elderly subjects (71.2) assessed 42 combinations of tread and rise in descending stairs. The female group wore 4 types of footwear, differing in the heel height. Dimensions of tread and rise with less difficulty in descending stairs existed in definite combinations, around 29〜30 cm tread and 18 cm rise for lower heels, and around 30 cm tread and 15.5 cm rise for higher heels. Psychological pressures increased as measurements deviated from these combinations of tread and rise. A practical value index is suggested in this paper.
- 1994-02-28
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