To provide a boom device capable of suppressing the damage of wire rope, and a crane equipped with the boom device.SOLUTION: A boom device is equipped with a boom side coupling portion 62 and a jib side coupling portion 63 that couple a boom and an extension jib so that a posture of the extension jib can change between a storage posture in which the extension jib overlaps with the boom in a side view and a work posture in which the extension jib is disposed on a tip end side of the boom. The boom side coupling portion 62 is equipped with a second contacting member 20 that has a second contacting surface 20a not contacting with a wire rope W in the work posture and contacting with the wire rope W in the storage posture. The jib side coupling portion 63 is equipped with a first contacting member 10 that has a first contacting surface 10a not contacting with the wire rope W in the work posture and contacting with the wire rope W in the storage posture. The second contacting surface 20a and the first contacting surface 10a have a curvature radius not less than the minimum bending radius of the wire rope W.SELECTED DRAWING: Figure 9
【課題】ワイヤロープの損傷を抑制することが可能なブーム装置とブーム装置を備えるクレーンを提供する。【解決手段】ブームと延長ジブとを、延長ジブの姿勢が、側面視で延長ジブがブームに重なった姿勢である格納姿勢と、延長ジブがブームの先端側に配置された姿勢である作業姿勢に変化することが可能な状態で連結するブーム側連結部62とジブ側連結部63を備え、ブーム側連結部62は、作業姿勢ではワイヤロープWと非接触であり、格納姿勢でワイヤロープWと接触する第二接触面20aを有する第二接触部材20を備え、ジブ側連結部63は、作業姿勢ではワイヤロープWと非接触であり、格納姿勢でワイヤロープWと接触する第一接触面10aを有する第一接触部材10を備え、第二接触面20a及び第一接触面10aが、ワイヤロープWの最小曲げ半径以上の曲率半径を有する。【選択図】図9
BOOM DEVICE AND CRANE EQUIPPED WITH THE BOOM DEVICE
ブーム装置、ブーム装置を備えるクレーン
2024-05-07
Patent
Electronic Resource
Japanese
IPC: | B66C Krane , CRANES |
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