PROBLEM TO BE SOLVED: To prevent a combine harvester from being clogged with discharged grains by wrong operation while enabling various parts of a machine body to be cleaned with pressurized air flow for grain discharging.SOLUTION: The combine harvester is provided with a grain transfer air flow channel (4) and a blower (5) for discharging grains in a grain tank (3) from a machine body by pneumatic transportation. A constant-rate grain delivering apparatus (6) is placed in the middle of the grain transfer air flow channel (4), and a pressurized air take-out channel (9) furnished with a changeover valve (8) operable from outside is branched at a point between the blower (5) and the grain transfer air flow channel (4). When the grain transfer flow air flow channel (4) is closed and the pressurized air take-out channel (9) is opened by a switching operation of the changeover valve (8), drive of the constant-rate grain delivering apparatus (6) is inhibited by interlocking with the switching operation.COPYRIGHT: (C)2011,JPO&INPIT【課題】穀粒排出用の圧風によって機体各部の清掃が行えるものとしながら、誤操作による排出穀粒の詰まりを防止する。【解決手段】グレンタンク(3)内の穀粒を空気搬送によって機外に搬出するための穀粒搬送風路(4)と起風装置(5)を設け、穀粒搬送風路(4)の途中位置に穀粒定量繰出装置(6)を装備し、起風装置(5)と穀粒搬送風路(4)との間に、外部から切替操作を可能にした切替弁(8)を備えた圧風取出風路(9)を分岐して設け、切替弁(8)を切替操作して、穀粒搬送風路(5)を閉とし、圧風取出風路(9)を開にすると、これに連動して前記穀粒定量繰出装置(6)が駆動できない状態になる構成とした。【選択図】 図1
