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.
CRANE, CRANE ASSEMBLY METHOD AND DISASSEMBLY METHOD
KRAN, KRANMONTAGEVERFAHREN UND DEMONTAGEVERFAHREN
GRUE, PROCÉDÉ D'ASSEMBLAGE ET PROCÉDÉ DE DÉSASSEMBLAGE DE GRUE
21.02.2024
Patent
Elektronische Ressource
Englisch
IPC: | B66C Krane , CRANES |
Crane with auxiliary disassembly and assembly structure
Europäisches Patentamt | 2021
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