Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
권호 표지

Performance and Preference for Handle Angles of Pliers

손잡이가 휜 Plier의 작업 수행도와 선호도 평가

  • Kee, Do-Hyung (Department of Industrial and Management Engineering, Keimyung University)
  • 기도형 (계명대학교 경영공학과)
  • Published : 2008.02.29
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Abstract

This study aims to investigate the effect of handle angles of pliers on performances of task completion time and the number of errors, and subjective ratings of preference. For doing this, an experiment was conducted, where 14 subjects of 11 college-age male and three female students participated. In the experiment, plier handles angled at $0^{\circ}$, $10^{\circ}$, $20^{\circ}$, $30^{\circ}$, and $40^{\circ}$ were used as independent variable, and the task completion time and the number of errors, and subjective ratings of preference as dependent variables. The subjects were instructed to do two tasks of bending an iron plate by $90^{\circ}$ and cutting wires. The results revealed that while the performances of task completion time and the number of errors were not statistically different depending upon the handle angles of pliers, the subjective ratings of preference were significantly different. Based on the results, it is recommended that the pliers with handles bent by $20^{\circ}$ be used in real situations.

Keywords

References

  1. 정민근, 기도형, 이인석, 최경임, 어홍준, 근골격 계질환 유해요인조사 보고서, 기아자동차(주), 2004
  2. C.A. Cacha, Ergonomics and safety in hand tool design, Lewis Publishers, New York, 1999
  3. 한국산업안전공단, 산업재해원인조사, 2003
  4. A. Mital and F. Aghazadeh, "A review of hand tool injuries", In: Ergonomics International 85, Taylor and Francis, London, pp. 85-87, 1985
  5. Bureau of Labor Statistics, Injury and illness casespart of body affected in hand tools, US Department of Labor, 1995-2001
  6. J. Emanuel, S. Mills, J. Bonnett, "In search of a better handle", Proceedings of the Symposium: Human Factors and Industrial Design in Consumer Products, Melford, MA, 1980
  7. R. Knowlton, J. Gilbert, "Ulnar deviation and shortterm strength reductions as affected by a curvehandled ripping hammer and a conventional claw hammer", Ergonomics, Vol. 26, pp. 173-179, 1983 https://doi.org/10.1080/00140138308963328
  8. R. Krohn, S. Konz, "Bent hammer handles", Proceedings of the Human Factors Society, 26th Annual meeting, Santa Monica, CA, pp. 413-417, 1982
  9. R.W. Schoenmarklin, W. Marras, "Effects of handle angle and work orientation on hammering: I. Wrist motion and hammering performance", Human Factors, Vol. 31, No. 4, pp. 397-411, 1989 https://doi.org/10.1177/001872088903100404
  10. R.W. Schoenmarklin, W. Marras, "Effects of handle angle and work orientation on hammering: II. Muscle fatigue and subjective ratings of body discomfort", Human Factors, Vol. 31, No. 4, pp. 413-420, 1989 https://doi.org/10.1177/001872088903100405
  11. S. Konz, "Bent hammer handles", Human Factors, Vol. 28, pp. 317-323, 1986 https://doi.org/10.1177/001872088602800307
  12. W.S. Marras, T.H. Rockwell, "An experimental evaluation of method and tool effects in spike manual use", Human Factors, Vol. 28, pp. 267-281, 1986 https://doi.org/10.1177/001872088602800303
  13. 산업자원부 기술표준원, 제5차 한국인 인체치수 조사 자료-직접 측정에 의한 인체 치수 통계, 2005
  14. 산업자원부, 한국인에 대한 근력 측정 조사 사업, 2007