Characteristics of work actions of shoe manufacturing assembly line workers and a cross-sectional factor-control study on occupational cervicobrachial disorders.

作者：Matsuo AMANO, Gensyo UMEDA, Hiroyuki Nakajima, Kuniko YATSUKI · 发表于：Sangyo Igaku · 年份：1988 · DOI：10.1539/joh1959.30.3 · 被引用次数：27 · 研究领域：Ergonomics and Musculoskeletal Disorders、Occupational Health and Safety Research、Effects of Vibration on Health

The characteristic work actions of female shoe manufacturing assembly line workers were analyzed by the records of 8-mm cine-films. The relationship between cervicobrachial disorders and work actions was investigated as a cross-sectional factor control study by using sex-age matched pairs for non-assembly line workers (102 pairs). The following conclusions were obtained: 1) The assembly line workers handled about 3,400 sneaker shoes per day on the assembly line. A completed shoe weighed 200-500 g. The metal last weighted 400-1,200 g. As the lines were not completely mechanized, the workers passed shoes to the next worker by hand. 2) In the line selected for the study of work actions, 28 female workers and one male worker were engaged. The work direction of the line was one-way (from left to right or vice versa). The actions of the workers were classified into four fundamental actions: i) grasping the shoe or tool, ii) extending or iii) bending of the arms, and iv) keeping the arms in a certain position. These fundamental actions were repeated more than 3,400 times per day by each worker. The time spent in holding a shoe in the left hand was longer than that of the right hand in holding a shoe or tool. 3) Results of medical examinations showed a higher prevalence in assembly line workers than that in non-assembly line workers. Especially the prevalence rate of tapping test, pain sensibility test, vibratory sensibility test, Morley's test, tenosynovitis in the fingers, tenderne...