发明名称 |
OVER-WINDING ALARMING METHOD AND DEVICE FOR WIRE ROPE OF PIPE LAYER |
摘要 |
PROBLEM TO BE SOLVED: To prevent an erroneous alarm of an over-wind alarming device for a hook hoist wire rope of a pipe layer. SOLUTION: An over-wind alarm is emitted when an over-wind of a wire rope is sensed only during the boom lowering operation or hook raising operation. After sensing of over-wind, the emission of the over-wind alarm is continued until over-wind is no more sensed. A parallel circuitry formed from a boom lowering sensing switch 43 to be actuated when the boom is lowered and a hook raising sensing switch 44 actuated when the hook is raised and an over- wind switch 32 of an over-wind sensing means 20 actuated when an over-wind is sensed are connected in series to an alarming means 42.
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申请公布号 |
JP2000211891(A) |
申请公布日期 |
2000.08.02 |
申请号 |
JP19990018170 |
申请日期 |
1999.01.27 |
申请人 |
KOMATSU LTD |
发明人 |
ONISHI NOBUO;TAKEUCHI ITSURO |
分类号 |
B66C23/36;B66C23/88;(IPC1-7):B66C23/88 |
主分类号 |
B66C23/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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