| 摘要 |
PROBLEM TO BE SOLVED: To improve the assembling property of a counterweight in a rotary work vehicle, improve the external appearance of the rotary work vehicle, improve the assembling property of a swivel joint, and easily increase hydraulic ports. SOLUTION: The counterweight 31 is formed of a plurality of members, and the split faces of the counterweight 31 are formed in the vertical direction. A protrusion section 33c protruded horizontally toward the center of a rotary frame 14 is provided on the lower inside of the counterweight 31, an insertion hole corresponding to the protrusion section is provided on the counterweight fitting section of the rotary frame 14, and the swivel joint is provided with a connection section for a hydraulic apparatus to the travel frame side over the upper and lower portions of the fitting section of a swivel joint tube.
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