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Journal Article

Citation

Watanabe J. J. Japan Soc. Safety Eng. 2023; 62(2): 130-138.

Vernacular Title

老朽化した既存不適合機械による労働災害に関する考察

Copyright

(Copyright © 2023, Japan Society for Safety Engineering)

DOI

10.18943/safety.62.2_130

PMID

unavailable

Abstract

According to the occupational accident statistics published annually by the Japan Ministry of Health, Labour and Welfare, a disturbingly high rate of occupational accidents by machinery categorized as "drawn into a machine" occurs in the manufacturing industry. The report entitled "Survey and Analysis Project for Safety Measures in Aging Production Equipment" by the Japan Ministry of Health, Labour and Welfare shows the occurrence of numerous occupational accidents due to insufficient protection measures with aging machines. In my study, the remaining number of aging machines which still have insufficient protection measures, herein defined as existing non-conforming aging machines, is estimated. Subsequently, a correlation between the trend of the estimated remaining number of machines and the annual rate of fatal accidents caused by such is analyzed. The results reveal that the trends with the remaining number of machines correlate well with trends in the rate of fatal accidents. It was found that safety measures for existing non-conforming aging machines are essential to reduce accidents caused by these non-conforming machines.

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厚生労働省が毎年発表している労働災害統計によると,製造業では「はさまれ巻き込まれ」に分類される機械による労働災害が非常に高い割合で発生している.厚生労働省の「老朽化した生産設備における安全対策の調査分析事業」では,老朽化した機械の保護方策が不十分であることに起因する労働災害が多く発生していることを指摘している.本研究では,既存不適合老朽化機械として定義される保護方策が不十分な老朽化機械の残存台数を推定した. 続いて,推定残存台数の年次推移と,それによる死亡災害の年間発生率との相関を分析した.その結果,残存台数の推移は死亡災害発生率の推移とよく相関していることが明らかとなった.これらの不適合機械による労働災害を減らすには,老朽化した既存不適合機械の安全対策が不可欠であることが明らかとなった.


Language: ja

Keywords

Aging machines; Non-conforming machines; Occupational accident; Protection measures; Weibull cumulative distribution function; ワイブル累積分布関数; 不適合機械; 保護方策; 労働災害; 老朽化機械

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