CRANE, CRANE ASSEMBLY METHOD AND DISASSEMBLY METHOD

A crane includes a jib posture retention device that retains in a predetermined frontward tilt posture to a boom. The jib posture retention device includes a jib mast that holds a rope connection part at a tensioning position separate from proximal end and a boom distal end backward thereof to rende...

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Bibliographische Detailangaben
Hauptverfasser:	TAKAOKA, Daisuke, WATANABE, Takuya, NAKATSUKA, Kenichi, HAMAGUCHI, Hiromitsu, IKAWA, Teppei, SUMIMOTO, Koji, ETO, Takao, WAMATA, Tsukasa, KOIZUMI, Yukio, KURIHARA, Shingo
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CRANES HAULING HOISTING LIFTING LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES PERFORMING OPERATIONS TRANSPORTING
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Beschreibung
Zusammenfassung:	A crane includes a jib posture retention device that retains in a predetermined frontward tilt posture to a boom. The jib posture retention device includes a jib mast that holds a rope connection part at a tensioning position separate from proximal end and a boom distal end backward thereof to render a jib-side support rope and a boom-side support rope linearly tensioned with the jib in the frontward tilt posture. The jib mast is configured to be shiftable to a tension form of holding the rope connection part at a tensioning position in an uprise posture and a looseness allowing form of locating the rope connection part at a looseness allowing position closer to the boom distal end than the tensioning position and closer to the jib proximal end than the tensioning position to allow the jib-side support rope and the boom-side support rope to be loosened.