| 摘要 |
PROBLEM TO BE SOLVED: To extend a life of a hydraulic hose by preventing the hydraulic hose from colliding with a front during revolving of a revolving superstructure. SOLUTION: Constitutionally, a side plate 14C of an arm 14 is provided with a hose cover 32 composed of a protrusive plate 33, a side surface plate 35 and a partition plate 37, and the hydraulic hoses 23 and 24 are housed in a hose storage space 38 formed between the plates 35 and 37 of the hose cover 32. Consequently, swings of the hydraulic hoses 23 and 24 in a horizontal direction during the revolving of an upper swing structure 2 can be regulated by the plates 35 and 37, and the hydraulic hoses 23 and 24 are prevented from colliding with an edge part 14A1 of an upper plate 14A of the arm 14 and being damaged, so as to enable extension of the lives of the hydraulic hoses 23 and 24.
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