| 摘要 |
PROBLEM TO BE SOLVED: To provide a co-rotation prevention device for a swivel, capable of preventing co-rotation of the swivel without needing human power. SOLUTION: The co-rotation prevention device for a swivel in an excavating device configured to perform excavation and agitation of the ground by providing an excavating motor on a leader to be movable up and down and rotating an agitating rod having the swivel at the upper end includes a roller chain and a chain holder which constrains the movement of the roller chain. The roller chain is attached to the swivel and suspended down, and the suspended roller chain is constrained by the chain holder attached to the excavating motor. COPYRIGHT: (C)2011,JPO&INPIT
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