| 摘要 |
PROBLEM TO BE SOLVED: To improve the maintainability of a work lamp, and the durability of a mounting part of a boom cylinder, in a boom structure of a revolving work vehicle. SOLUTION: In this boom structure of the revolving work vehicle, a revolvably-constituted revolving superstructure 8 is provided with a boom bracket 12; a boom 6 is rotatably mounted on the boom bracket 12; and an arm 5, which is equipped with a working machine, is rotatably mounted on the boom 6. Right and left mounting ribs 62 and 62, which pivotally support an upper end of the boom cylinder 23 for rotating the boom 6, are protrusively provided in the front part of the boom 6 which is constituted in an approximately doglegged shape in a side view; a supporting shaft 63 for rotatably and pivotally supporting an upper rod of the boom cylinder 23 is arranged between right and left ribs 62 and 62; a stay 64 for the work lamp 61 is fixedly provided between the right and left ribs 62 and 62 above the supporting shaft 63; and the work lamp 61 is arranged on the stay 64. COPYRIGHT: (C)2007,JPO&INPIT
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