한국안전학회지 (Journal of the Korean Society of Safety)

  • 제24권2호
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  • Pages.69-75
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  • 2009
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  • 1738-3803(pISSN)
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  • 2383-9953(eISSN)
한국안전학회 (The Korean Society of Safety)
권호 표지

들기작업 시 몸통각도와 상완각도가 작업부담에 미치는 영향에 관한 연구

A Study of the Effects of the Trunk Angles and the Upper Ann Angles on Workloads in the Lifting Work

  • 발행 : 2009.04.30
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초록

It is well-known that lifting capacity of a worker is influenced by body posture during the task. When a task analyst make use of RULA and REBA Trunk and upper arm angles are recorded in a separate item. It means that the interaction between the angles of two body segments may be ignored in a final score. The NLE(NIOSH Lifting Equation) has been used to supplement this problem. However, there is no study to validate the result of RWL (Recommended Workload Limit) under the existence of interactions between trunk and upper arm angles. The goal of this study was to assess the effect of the interaction between trunk and upper arm angles. Three responses, including NMVC(normalized maximum voluntary contraction), RWL(Recommended Weight Limit) and subjective judgment in psychophysical method (Borg's scale), were recorded according to the combinations of three trunk angles and nine upper arm angles. The results showed that lifting capacity is highly influenced by interaction of two body segments(trunk and upper arm). It means that the task workload has to be analyzed along with the interaction of trunk angles and upper arm angles when the task analyst assesses potential risk factors on the postures. This study may be able to be a fundamental study to develop an assessment method for lifting task analyses according to body postures.

키워드

참고문헌

  1. Hazard Evaluation System and Information Service, 'A physician's Guide to the California ergonomics standard', Hazard Evaluation System and Information, 2001
  2. DOL, 'Industrial Accidents Analysis,' 2001-2007
  3. Bhattacharya A. and DJ McGlothlin, 'Occupational Ergonomics-Theory and Applications', Marcel Dekker, Inc., pp. 137-164, 1996
  4. McAtammey L. and E.N. Corlett, 'RULA : a survey method for the investigation of work-related upper limb disorders', Applied Ergonomics, Vol. 24, pp. 91-99,1993 https://doi.org/10.1016/0003-6870(93)90080-S
  5. Hignett and L. McAtammey, S., 'Rapid Entire Body Assessment(REBA)', Applied Ergonomics, Vol. 31, pp. 201-205, 2000 https://doi.org/10.1016/S0003-6870(99)00039-3
  6. Waters, T.R., V. Putz-Anderson, and A. Garg, 'Applications Manual for the Revised NIOSH lifting equation', Cincinati, OH: DHHS(NIOSH), pp. 4-35, 1994
  7. Bystrom, lU., G.A. Hansson, L. Rylander, K. Ohlsson, G. Kallrot, and S. Skerfving, 'Physical workload in neck and upper limb using two CAD applications', Applied Ergonomics, Vol. 33, pp. 63-74,2002 https://doi.org/10.1016/S0003-6870(01)00044-8
  8. Forsman, M., R. Kadefors, Q. Zhang, L. Birch, and G. Palmerud, 'Motor-unit recruitment in the trapezius muscle during arm movements and in VDU precision work', International Journal of Industrial Ergonomics, Vol. 24, pp. 619-630, 1999 https://doi.org/10.1016/S0169-8141(98)00067-5
  9. Stackhouse, S.K., lE. Stevens, S.C. Lee, K.M. Pearce, L. Snyder-Mackler, and S.A. Binder-Macleod, 'Maximum Voluntary Activation in Nonfatigued and Fatigued Muscle of Young and Elderly Individuals', Physical Therapy, Vol. 81, No 5, 2001
  10. Chang S.R. and D.C. Bae, 'A study on the coupling effect during lifting', J of the KIIS, Vol. 18, No.2, pp. 119-124,2003
  11. D.C. Montgomery, Design and Analysis of Experiments, fifth ed. John Wiley and Sons, Inc, New York. 2001
  12. A.F. Huxley, 'Muscular contraction', Journal of Physiology, Vol.243, No.1, 1977
  13. D.B. Chaffin, G.BJ. Andersson, and BJ. Martin, Occupational Biomechanics. 3rd ed., 1999