| 摘要 |
PROBLEM TO BE SOLVED: To provide a combined harvester which judges a reaping mode, a hand-reaping mode or a waiting mode on the basis of the operation state of a reaping portion for reaping grain straws and on the basis of the operation state of a threshing cylinder for threshing the reaped grain straws, sets a threshold in response to the amount of grains conveyed to a grain tank, and controls the amount of the grains discharged from a dust-sending port and the like on the basis of the modes and the set threshold. SOLUTION: Outputs from a reaping switch 82, a threshing switch 81, a grain straw sensor 9 and a speed sensor 43 are input into a controller 90 to judge the a reaping mode, the hand-reaping mode or the waiting mode. A charging port sensor 23b is disposed in a charging port for sending out grains into the grain tank, and discharging amount sensors 34 are disposed in a dust-discharging port and an exhausting passage. The controller 90 sets a threshold on the basis of the output of the charging port sensor 23b in the time of the reaping mode, and a grain amount detected with the discharging amount sensors 34 is compared with the threshold. The control for reducing the amount of grains discharged from the dust-discharging port and the exhausting passage is performed on the basis of the comparison result. COPYRIGHT: (C)2010,JPO&INPIT
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