지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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Despite most of tasks in manufacturing, construction and agriculture, etc., were currently mechanized and automated, manual materials handling still existed in atypical working condition. In case of manual materials handling, repetitive work, inappropriate working posture, excessive force, contact stress might cause overload, which could lead to work-related musculoskeletal disorders and low back pains. On this basis, the goal of this study is to reveal the effects of various lifting postures of trunk angles and lower extremity postures on maximum holding time(MHT). Twenty two subjects were recruited from a university population. The experiment was designed by a combination of three trunk angle ($0^{\circ}$, $20^{\circ}$, $60^{\circ}$) and three lower extremity postures(straight, bent, kneeling). Before experimental trials, subjects performed MVC(maximum voluntary contraction) exertions in three trunk angles ($0^{\circ}$, $20^{\circ}$, $60^{\circ}$) to calculate 30%MVC at designated postures. In each trial, they were required to hold the handheld load(30%MVC) for a designated posture as long as they could. The results of MVC by trunk angles were measured in $0^{\circ}$ > $20^{\circ}$ > $60^{\circ}$ orders, but those of MHT measured in $20^{\circ}$ > $0^{\circ}$ > $60^{\circ}$ orders. These results showed that straight posture is the ideal working posture in work exerted a strong force for a short time, but the ability to work might be improved in the trunk angle $20^{\circ}$ in work required 30%MVC for a long time. Also, results of MVC and MHT by lower extremity postures measured in straight > bent > kneeling orders.
목차
등록된 정보가 없습니다.
참고문헌 (16)
참고문헌 신청
2002 / A postural workload evaluation system based on a macro-postural classification / HUMAN FACTORS AND ERGONOMICS IN MANUFACTURING 12(3):267~277
이인석 / 2002 / 심물리학적 방법을 이용한 다양한 하지 자세의 부하 평가 / 대한인간공학회지 21(4):47~65
Kirby R.L / 1987 / The Influence if foot position on standing balance / Journal of Biomechanics 20(4):423~427
Van Wely P / 1970 / Design and disease / Applied Ergonomics 1(5):262~269
Grandjean E / 1977 / Ergonomics of postures review of various problems of standing and sitting postures / Applied Ergonomics 8(3):135~140
이인석 / 2002 / 심물리학적 방법을 이용한 다양한 하지 자세의 부하 평가 / 대한인간공학회지 21(4):47~65
Kirby R.L / 1987 / The Influence if foot position on standing balance / Journal of Biomechanics 20(4):423~427
Van Wely P / 1970 / Design and disease / Applied Ergonomics 1(5):262~269
Grandjean E / 1977 / Ergonomics of postures review of various problems of standing and sitting postures / Applied Ergonomics 8(3):135~140
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