GRAIN CULMS-CONVEYING APPARATUS OF COMBINE HARVESTER

摘要

PROBLEM TO BE SOLVED: To provide a grain culms-conveying apparatus of a combine harvester constituted so as to carry out manual threshing operation by operating only a threshing part in a state in which traveling of the combine harvester is stopped. SOLUTION: This combine harvester is constituted so as to interlock a variable speed transmission for traveling and driving with a variable speed transmission for pre-treatment and interlock a traveling speed of the combine harvester with a conveying speed of grain culms in a pre-treating part and a feed chain. In the combine harvester, an interlock-releasing means (manual threshing switch 95) for releasing interlock of the traveling speed with the conveying speed of the grain culms is provided. Then, when the interlock release means is turned ON, the number of revolutions of an output shaft of the variable speed transmission for traveling and driving is controlled so as to become the number of revolutions which is proportional to the number of revolutions of a power source irrespectively of traveling of the combine harvester. Even when traveling of the combine harvester is stopped, driving of a feed chain can be carried out to enable manual threshing operation.