发明名称 LEADER TYPE PILE-DRIVER
摘要 PROBLEM TO BE SOLVED: To provide a leader type pipe-driver capable of preventing an overload state applied to a mast in the case of the derricking works of a leader. SOLUTION: One end section of a leader derricking rope 10 is connected to the root attaching section 7A of a mast 7 through an overload preventive device 11 having an alarm means. The overload preventive device 11 has a cylinder 12 in which a base end section is connected to the root attaching section 7A of the mast 7, an expansion rod 14, which is urged in the shrinking direction by a spring 13 incorporated to the cylinder 12 and in which a projecting end section is connected at one end section of the leader derricking rope 10, a limit switch 16 on-off operated by a dog 15 fixed onto the expansion rod 14 and an overload alarm means operated by the limit switch 16.
申请公布号 JP2000319879(A) 申请公布日期 2000.11.21
申请号 JP19990129388 申请日期 1999.05.11
申请人 SUMITOMO CONSTR MACH CO LTD 发明人 HAYAKAWA TAKAMICHI
分类号 E02D7/14;(IPC1-7):E02D7/14 主分类号 E02D7/14
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