[논문]자동차 제조업체 조립공정 근로자의 국소진동 노출 수준 및 작업환경 만족도 평가

박성현; 강모열; 김승원; 최상준

doi:10.15269/jksoeh.2023.33.2.103

자동차 제조업체 조립공정 근로자의 국소진동 노출 수준 및 작업환경 만족도 평가
Evaluation of Hand-Arm Vibration Exposure Level and Work Environment Satisfaction of Workers in Automobile Manufacturer Assembly Process 원문보기

한국산업보건학회지 = Journal of Korean Society of Occupational and Environmental Hygiene, v.33 no.2, 2023년, pp.103 - 114

박성현 (가톨릭대학교 보건의료경영대학원) , 강모열 (가톨릭대학교 서울성모병원 직업환경의학과) , 김승원 (계명대학교 공중보건학과) , 최상준 (가톨릭대학교 보건의료경영대학원)

Abstract ▼ AI-Helper

Objectives: This study was conducted to evaluate hand-arm vibration (HAV) exposure levels due to the use of power hand tools and to evaluate the determinants in the automobile assembly process. Methods: The exposure level to HAV was evaluated for 30 work lines in five assembly processes (body, engine, chassis, door, and design) that use air-powered tools and battery-powered tools and operate in circulation for two hours. The 2-hr equivalent energy vibration acceleration, A (2), of the task was measured. The 8-hr equivalent energy vibration acceleration, A (8), was estimated in consideration of the number of tasks that can be performed per day by each process. In addition, a survey on the working environment was conducted with workers exposed to vibration. Results: The geometric mean of the HAV exposure level, A (2), for a total of 30 tasks was 2.51 m/s2, and one case was 10.30 m/s2, exceeding TLV (2hr). The HAV exposure level of A (8) was evaluated from 1.03 m/s2 to 5.36 m/s2. A (2) showed a statistically significant difference (P<0.01) for each process, and the chassis process (GM=3.90 m/s2) was the highest. The larger the tool size and the longer the tool length, the higher was the vibration acceleration when using a battery-powered tool than an air-powered tool (P<0.01). Battery-powered tool users showed higher dissatisfaction on all items than did air-powered tool users. Conclusions: As a result of this study, it is necessary to implement a program to reduce the HAV exposure levels.

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표/그림 (9)

표 Table 1. Basic characteristics of process, department, and tasks in this study
그림 Figure. 1. Examples of air-powered tool (a) and battery-powered tool (b)
표 Table 2. Summary of hand-arm vibration exposure level for two hours (A (2)) by process and the characteristics of hand tools
그림 Figure 2. Comparison of the frequency-weighted root means square (RMS) acceleration (㎨) of three axises and average crest factor measured in 30 tasks
표 Table 3. Multiple regression analysis results on the effect of hand tool characteristics on hand-arm vibration exposure level(A (2))
표 Table 4. Comparison of daily hand-arm vibration exposure (8-hour energy equivalent total value) levels by process
표 Table 5. Comparison of subjective evaluation results of workers on the working conditions by hand tool type
그림 Figure 3. Comparison of percentage point (%p) differences between satisfaction and dissatisfaction responses in the working environment according to the type of hand tool used
그림 Figure 4. Comparison of assembling tasks between design and chassis process

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