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| Titel: |
Biomechanical comparison of carpet-stretching devices |
| Auteur: |
Village, J. Morrison, J. B. Leyland, A. |
| Verschenen in: |
Ergonomics |
| Paginering: | Jaargang 36 (1993) nr. 8 pagina's 899-909 |
| Jaar: |
1993-08-01 |
| Inhoud: |
Peak impact forces, measured from seven male carpetlayers using a knee-kicker over 39 trials were 2933 N (SD 397), taking 9·5 ms (SD ± 1·1) to reach peak. The knee-kicking cycle involved high knee decelerations of 880 m.s-2 (SD ±271). Angles at peak force for the knee (63° SD ± 10°) and hip (80° SD ± 35°) showed considerable variation between individuals. Kneeling forces on the non-kicking leg during the kick cycle were 894 N: comparative forces were 368 N and 476 N measured during use of the power stretcher and crab re-stretcher, respectively. Under dynamic conditions the effective mechanical advantage of the knee-kicker was less than 1·0. In comparison, the mechanical advantage of the power stretcher was approximately 14 times greater over the stretch action. When tested with a crab re-stretcher, the breaking strength of the smooth-edge to which the carpet attaches averaged 2384 N (SD ± 245). Design guidelines for an improved carpet stretching device are provided. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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