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Journal Article

Citation

Kikkawa N, Itoh K, Hori T, Shimizu S, Hamajima K, Umezaki S, Toyosawa Y. J. Jpn. Soc. Civil Eng. Ser. F6 Saf. Probl. 2014; 70(2): 107-114.

Vernacular Title

ドラグ・ショベルに係る死亡災害の詳細分析と再発防止対策の検討

Copyright

(Copyright © 2014, Japan Society of Civil Engineers)

DOI

10.2208/jscejsp.70.I_107

PMID

unavailable

Abstract

In Japan, we have more than 600,000 drag-shovels and the death labour accidents relating with drag-shovels happened more than 70 per a year until 2006. So that we analysed the accidents relating with drag-shovels in details. As a result, there are 4 types of labour accidents: a drag-shovel falls down due to its unstable condition, a burden hanged hits a worker, slope or trench collapses due to excavation and weight of a drag-shovel, a drag-shovel drives backward or pivots and hits a worker. It is revealed that a drag-shovel becomes unstable condition due to dynamic operation such as driving forward or pivoting in a slope and that a drag-shovel and worker are working together within the maximum excavation radius of the drag-shovel. As the countermeasure for the safety, we recommend the use of a drag-shovel with ROPS (Roll-Over Protective Structure) and fastening a seat belt, to set the maximum stable grade considered with dynamic operation, the system alerting both an operator and worker to their approach.


Language: ja

Vernacular Abstract

建設機械のうち,国内の推定保有台数,死亡災害の件数ともに多いドラグ・ショベルに焦点を当て,同災害を詳細に分析した.その結果,ドラグ・ショベルに係る死亡災害は,ドラグ・ショベルが「墜落・転落」,「転倒」する災害,つり荷による「飛来・落下」,斜面,溝等が「崩壊・倒壊」する災害,ドラグ・ショベルに作業員が「激突され」「はさまれ・巻き込まれ」て被災する災害に大別された.また,斜面上での走行や旋回といった動的な状態によりドラグ・ショベルが不安定化すること,狭小な作業環境もあり作業員がドラグ・ショベルの最大掘削半径内で作業していた状況等が明らかとなった.再発防止対策は,転倒時保護構造(ROPS)を有したドラグ・ショベルの使用,シートベルトの着用の徹底,動的な状態を考慮した安定度の設定と遵守,作業員と運転者にお互いの接近を認知させるシステム等である.

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