PROBLEM TO BE SOLVED: To safely perform a cleaning operation of a body of a combine harvester by using a blower driven by an engine.SOLUTION: The combine harvester has a constitution that an air path 5 communicating with a pressure air blowing side of a blower 3 is branched into a grain conveying air path 6 and a cleaning air path 7, the branched part of the air path 5 is equipped with an air path switching device for switching pressure air from the blower 3 to either state of a state for sending air to a grain conveying air path 6 side and a state for sending air to a cleaning air path 7 side, a cleaning switch connects a blower clutch 9 when the air path switching device is switched to a state for sending air to the cleaning air path 7 side and operation of the cleaning switch connects the blower clutch 9 only when a parking brake 11 mounted on the body 1 of the combine harvester is held in a braking state.COPYRIGHT: (C)2011,JPO&INPIT【課題】エンジンで駆動されるブロワを用いて、コンバインの車体の清掃作業を安全に行なえるものとする。【解決手段】ブロワ3の圧風吹き出し側に連通した風路5を穀粒搬送風路6と清掃用風路7とに分岐させ、該風路5の分岐部にブロワ3からの圧風を穀粒搬送風路6側へ送る状態と清掃用風路7側へ送る状態とのいずれかの状態に切替える風路切替え装置を設け、該風路切替え装置を清掃用風路7側へ送風する状態に切替えた場合にブロワクラッチ9を接続可能とする清掃スイッチを設け、コンバインの車体1に装備した駐車ブレーキ装置11を制動状態に保持しているときにのみ清掃スイッチの操作でブロワクラッチ9を接続できる構成とする。【選択図】図2
