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200186 Optimal vertical handrail position and its biomechanical evaluation 1 1 2 Aki KAWAGUCHI, Matsuki YAMAMOTO, Masao TANAKA A standard position for handrail assisting standing-up motion has been suggested by the Ministry of Construction (currently Ministry of Land, Infrastructure and Transport). It, however, does not accompany any suggestion on physical difference among individuals or clear biomechanical background. In this study, sensory evaluation and biomechanical analysis were conducted in order to understand the vertical handrail usability. As the results, two patterns were distinguished clearly for standing-up motion: one utilizes arm power and the other does body inertia. A formula was proposed for the optimal handrail position in terms of individual physical dimensions for two different standing-up motion patterns. The optimal handrail position was also investigated based on link model analysis and its biomechanical meaning was clarified. 1 2 21 12 2 4 200110 33
1 22 1 3 4 150 250 100400 7001250 150200 300 23 516 17 18 1922 34 2 4 200110
3 14146885 734 500 1 50 34 400 770 1040 400 200 20 23 3 4 400 05 10 15 010 1310 15 200 400 600 34 3 550 400200 400 1 2 2 4 200110 35
12 10 08 06 04 02 00-05 00 05 10 12 10 08 06 04 02 00-05 00 05 10 3 41 20 0 0 42 0 0 36 2 4 200110
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5 51 400 60200 150 14 6070 5065 200 400 60 1400 07 1200 1000 800 y = 3499.5x - 535.5 R 2 = 0.3565 SH = 400 SH = 200 600 036 038 04 042 044 046 06 05 y = -1.4693x + 1.1802 R 2 = 0.1744 04 SH = 400 SH = 200 03 036 038 04 042 044 046 (a) I (b) II 7 1000 800 600 400 y = 1.4505x + 398.45 R 2 = 0.5356 200 SH = 400 SH = 200 0-200 0 200 400 600 1000 800 600 400 200 0-200 y = 0.8717x + 410.64 R 2 = 0.2076 SH = 400 SH = 200 0 200 400 600 8 38 2 4 200110
3500 5355 1 400 145 2 147 118 3 410 087 4 96 221 52 1 4 9 1 55095 24 600 110 950 50150 1080 100 400 1 16 385 1922 342 60 5,50,95 A B 400 300 200 100 0 1400 1300 1200 1100 1000 900 800 700 600 5,50,95 A B 400 300 200 100 0 1400 1300 1200 1100 1000 900 800 700 600 5,50,95 A B 400 300 200 100 0 1400 1300 1200 1100 1000 900 800 700 600 300 200 5,50,95 A B 100 0 1400 1300 1200 1100 1000 900 800 700 600-100 9 2 4 200110 39
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05 04 03 02 01 00 05 04 03 02 01 00 05 04 03 02 01 00 05 04 03 02 01 00 13 8 2 4 200110 43
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