S171016 建設機械の安全 : 油圧ショベルのROPS(転倒時保護構造)([S171-01]産業機械の安全(1))

抄録

ROPS (Roll-over Protective Structure) has been installed on every type of construction machine but excavator. It was thought that an excavator's work attachment which was like a big arm supported the whole machine and prevented it from rolling over. But it was wrong. Fatal incidents of excavator roll over counted the most in number among fatal accidents involving construction machines in Japan. This fact led us to make the standard of ROPS for excavator. Because of the uniqueness of the machine type, Existing ROPS standard did not fit to the excavator. After conducting actual roll over test and laboratory test, we came up with loading force and energy criteria for laboratory evaluation of ROPS, which were incorporated into ISO 12117-2 (Laboratoiy tests and performance requirements for protective structures of excavators).