Effects of working posture on workload during a simple repeated task.

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  • 単純繰り返し作業による作業姿勢が作業負担に及ぼす影響
  • タンジュン クリカエシ サギョウ ニ ヨル サギョウ シセイ ガ サギョウ フ

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In this study, we estimated the work of machine operators who use a screen display to obtain visual information, and examined the effects of the combination of working hours and working posture on the result and load of the work. The results are as follows : 1) During the continuously operating work in a cabin, mental load in a seated posture tended to be heavier than that in a standing posture. 2) The increase in heart rate was alleviated by starting the work in a seated posture followed by that in a standing posture. The workers operating continuously for a long period complained of severe stress, and the change of work type reduced the stress. 3) The longer the continuously operating work, the worse became the work results, and the results were improved by repeatedly changing the work type within a short time. In particular, "overlooking" occurred frequently during the continuous long-hour work in a seated posture, and the frequency was extremely lowered by changing the work types within a short time. "Overlooking" is one of the work mistakes made during the operating work, and its frequency is considered to correlate with labor hazards. Thus, in these operations, long monotonous work is considered to be hazard of labor accidents.

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