| 摘要 |
PROBLEM TO BE SOLVED: To improve dwelling performance in a cab by restraining pitching and rolling of the cab independently of vertical directional vibration. SOLUTION: A column 13 extending downward in a bed frame 5 is arranged on a floorboard 11 of a cab 10, the column 13 and the bed frame 5 are connected in the longitudinal direction by an oil damper 17, and the column 13 and the bed frame 5 are connected in the lateral direction by an oil damper 18. Thus, when the column 13 arranged on the floorboard 11 of the cab 10 is displaced in the longitudinal direction and the lateral direction since the cab 10 causes pitching and rolling, the oil damper 17 and the oil damper 18 generate damping force by extending/contracting in the shaft direction, and the pitching and the rolling of the cab 10 can be restrained independently of vertical directional vibration so that dwelling performance of the cab 10 can be improved.
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