| 摘要 |
PROBLEM TO BE SOLVED: To obtain in a simple structure a harvester wherein the pitching adjustment and the rolling adjustment of a travel machine frame can be performed. SOLUTION: The truck frame 11 of one 10b of right and left crawler travel devices 10a, 10b can be lifted or lowered with respect to a machine frame 20 with a front cylinder 40 so that the front end side is lifted or lowered, while using the rear side end as a support, and can also be lifted or lowered with respect to the machine frame 20 with a rear cylinder 41 so that the rear end side is lifted or lowered, while using the front side end as a support. The truck frame 11 of the other 10a of the right and left crawler travel devices 10a, 10b can be lifted or lowered with respect to the machine frame 20 with a pitching cylinder 42 only in a front side-lifting or lowering shape for lifting or lowering the front end side, while using the rear side end as a support. COPYRIGHT: (C)2004,JPO&NCIPI
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