| 摘要 |
PROBLEM TO BE SOLVED: To prevent an oil pressure hose for supplying and discharging pressure oil to an arm cylinder and a working tool cylinder from interfering with an upper revolving structure side in driving a working apparatus. SOLUTION: The base end part 29A side of an arm oil pressure hose 29 for supplying and discharging to the arm cylinder 26 of the working apparatus 21 is disposed extending from the swing post 5 side to pass between the lower surface side of a boom 22 and a boom cylinder 25. Thus, when the boom 22 is lowered, a sag part 29A1 formed on the base end part 29A side of the arm oil pressure hose 29 is disposed on the lower surface side of the boom 22, so that the sag part 29A1 is prevented from interfering with the front end side of the upper revolving structure 3. The base end part 30A side of a bucket oil pressure hose 30 for supplying and discharging pressure oil to a bucket cylinder 27 is also disposed extending from the swing post 5 side to pass between the lower surface side of the boom 22 and the boom cylinder 25, so that a sag part 30A1 is prevented from interfering with the front end side of the upper revolving structure 3.
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