PROBLEM TO BE SOLVED: To provide a gantry structure of a construction machine in which a shaft part provided on a connection member is automatically held by a shaft holding part provided on an upper rear leg when changing from a stored state to a working state.SOLUTION: In a stored state, a front leg 4, an upper rear leg 5, and a lower rear leg of a gantry are folded, and in a working state, the upper rear leg 5 and the lower rear leg extend on a substantially vertical line. In a connection member 7 connecting a connection part 32 between the front leg 4 and the upper rear leg 5 to a base to hold the stored state, an upper end part 71 as a turning center is connected to the connection part 32, and a shaft part 75 is provided. Correspondingly to the shaft part 75, a shaft holding part 8 is provided on the upper rear leg 5. The shaft holding part 8 has a shaft holding surface 81 for holding a lower end part of the shaft part 75, a falling prevention part 82 located above the shaft holding surface 81, and a guide part 83 inclined downward toward the front side.SELECTED DRAWING: Figure 6
【課題】格納状態から作業状態とする際に、連結部材に設けられた軸部が上部後脚に設けられた軸保持部に自動的に保持される建設機械のガントリ構造を提供する。【解決手段】格納状態では、ガントリの前脚4、上部後脚5、下部後脚が折り畳まれ、作業状態では、上部後脚5と下部後脚とが略垂直線上に延びる。前脚4と上部後脚5との連結部32を基台に連結して格納状態を保持する連結部材7は、回動中心となる上端部71が連結部32に連結され、軸部75が設けられる。軸部75に対応して、上部後脚5に軸保持部8が設けられる。軸保持部8は、軸部75の下端部を保持する軸保持面81と、軸保持面81よりも上側に位置する脱落防止部82と、前側に向けて下り傾斜するガイド部83と、を有する。【選択図】図6
GANTRY STRUCTURE OF CONSTRUCTION MACHINE
建設機械のガントリ構造
2018-01-11
Patent
Elektronische Ressource
Japanisch
IPC: | B66C Krane , CRANES |