チェン・ソーおよび刈払機の振動と使用者の自覚症状について

概要

論文の詳細を見る
Vibration of chain saws and bush cleaners widely used in Hokkaido was measured at the handle of these machines to evaluate the degree of the effect of vibration on machine operators. And then, subjective symptoms of operators were surveyed. An electro-vibrometer was used for the vibration measurement, with an electrodynamic pickup for vibration amplitude measurement and with a barium titanate pickup for accerelation measurement and frequency analysis. Table 1 and 2 show the results of the vibration measurement at various conditions of engine operation, and Fig.1 shows the results of the frequency analysis. Most of the values of vibration amplitude exceeded allowable limits of vibration as proposed by Miura and used in the Soviet Union. Sixty nine chain saw operators and 18 bush cleaner operators were questioned with regard to Raynaud's phenomenon and other complaints. These operators had short experience in the machine operation, i.e. 87% of the chain saw operators had experience less than 4 years and the other 4∼7 years. Experience of bush cleaner operators was about 1 year. Complaints of Raynaud's phenomenon at fingers were found in 10 of chain saw operators (occurrence rate 15.6%) and in 2 of bush cleaner operators (11.1%). Numbness feeling at fingers and hands were found in 30 of chain saw operators (46.9%) and in 7 of bush cleaner operators (38.9%). Pains at hands and fingers were found in 25% of the operators. These symptoms occured more frequently at the right hand than at the left. The author recognized that these symptoms were caused by the vibration of the machines. As a conclusion, widely used chain saws and bush cleaners have harmful effects causing vibration disease at the fingers and hands of operators, as, in fact, was foud among the operators.
社団法人日本産業衛生学会の論文
1966-05-20

チェン・ソーおよび刈払機の振動と使用者の自覚症状について

スポンサーリンク

概要

著者

関連論文

スポンサーリンク