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한국인 20대 남성의 NIOSH Lifting Equation 계수평가에 관한 연구
배동철 ( Dong Chul Bae ),김용재 ( Yong Jae Kim ) 한국안전학회 2009 한국안전학회지 Vol.24 No.4
The objective of this paper was to evaluate the effectiveness of horizontal, vertical, asymmetric and coupling multipliers for manual material handling. Lifting tasks with 5 different horizontal distances (30~70cm) for 6 vertical distances(ankle, knee, waist, elbow, shoulder and head height) were experimented. The muscle activity and muscle exertion level during asymmetric load handling(without trunk flexion) was experimented. Lifting tasks with and without handle tote box for three postures(straight, bending, right angle posture) were experimented. The degrading tendency did not appeared almost in 60~70cm interval`s horizontal distance. As a result of ANOVA, MVC paid attention to horizontal and vertical distance but cross effect was insignificant(p<0.01). The change of the MVC according to the horizontal, vertical distance appeared similar from of RWL. The results of normalized MVC measurement were decreased about 16%, 24%, 34% respectively as the asymmetry angle was 30˚, 60˚, 90˚. RMS.EMG values of right erector spinae muscles were decreased as the work posture went to 90˚ and those of left erector spinae muscles were increased until the asymmetry angle was 40˚ but decreased continually over 40˚. 7 subjects, activities of left and right latissimus dorsi muscles were maintained constantly, while for remainer, those were irregular. MVC reduced maximum 23% by type of handle. MVC was highest in straight posture, but was lowest in right angle posture. As a result of ANOVA, MVC paid attention to posture, coupling(p<0.01). To all handle types, biceps brachii activity was increased in right angle posture, but reduced in straight posture. Based on the results of this study, it is suggested that the NIOSH guideline should not be directly applied to Korean without reasonable reexamination. In addition, we need to afterward study through an age classification.
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산업재해 예방을 위한 재정지원사업의 수요자 설문조사를 통한 제도적 개선방안 연구
배동철 ( Dong Chul Bae ) 한국안전학회(구 한국산업안전학회) 2018 한국안전학회지 Vol.33 No.4
The purpose of this study is to conduct surveys on demanders using financial aid projects to prevent industrial accidents and to improve them. It is divided into clean business and loan support business through the structured questionnaire. In the case of clean business, the following results were obtained. Most of the applications were received within three months after application. The most important factor considered by the consumer is the amount of support, which is considered to consider the substantial improvement as follows.The expectation for the reduction of industrial accidents after the project was 96.1% and compared to before and after the actual business, it showed a 46.8% decrease from the previous year. In addition, the cost decreased by 21.8%, the facility utilization rate increased by 24.4%, the sales increased by 15.9%, and the average number of workers increased by 6.0. As for the sustainability of the business, 86.6% of the respondents said that they should continue to do so. The following results were obtained in the case of loan support projects. Industrial accidents decreased by 45.2% from the previous year. Costs decreased by 19.4%, facility utilization rose by 26.7%, sales increased by 14.9%, and the number of workers increased by an average of 2.8. In the case of suppliers, prevention of industrial accidents at the business sites participating in the clean business was the highest factor (67.0%). 89% of respondents were aware of the disposal criteria for ineligible suppliers. 50.6% of the respondents answered that it is appropriate to maintain the current level, and 39.4% of respondents answered that they should strengthen. The prices for the support items were more than 15% higher than the market prices.
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장성록,배동철 한국안전학회 2003 한국안전학회지 Vol.18 No.2
Despite rapid technological advance and increased automation facilities, many jobs and activities in our living require manual materials handling(MMH). These include wide variety of activities such as moving things, lifting bags, boxes or cartons, etc. Many studies found that handle could affect on maximum acceptable weight of lifting, but there were few studies for the effects of work posture and coupling in lifting tote box. This study performed that ten male college students were required to lift a tote box with and without handle for three postures (bending, straight, right angle posture). From the experiment, following results were obtained. (1) MVC reduced maximum 23% by type of handle. (2) MVC was highest in straight posture, but was lowest in right angle posture. (3) As a result of ANOVA, MVC paid attention to posture and coupling. (p<0.01) (4) To all handle types. biceps brachii activity was increased in right angle posture, but reduced in straight posture. (5) To all posture, biceps brachii activity was most lively in no handle. The results of MVC measurement, subjective rating. EMG analysis, statistic analysis showed that maximum acceptable weight of lifting was influenced by type of handle and straight posture was more comfortable than other postures. Based on these results. it was concluded that acceptable weight of lifting has to differ for work posture and coupling.
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