PROBLEM TO BE SOLVED: To provide a combine harvester, capable of accurately preventing a normal rotation clutch mechanism and a reverse rotation clutch mechanism from simultaneously getting into an on-state relative to a reaping treatment unit.SOLUTION: A combine harvester includes: a normal rotation clutch mechanism 92 capable of connecting and disconnecting, based on an operation of an on-off operation tool for normal rotation, a normally rotating power for operation from an engine to and from a reaping treatment unit and a reverse rotation clutch mechanism 103 capable of connecting and disconnecting, based on an operation of an on-off operation tool for reverse rotation, connecting and disconnecting a reversely rotating power opposite to the normally rotating power from the engine to and from the reaping treatment unit. The combine harvester further includes a preventive mechanism 116 which prevents the normal rotation clutch mechanism 92 and the reverse rotation clutch mechanism 103 from simultaneously getting into an on-state by interlocking and coordinating a clutch on-off operation body 118 in the normal rotation clutch mechanism 92 and a clutch on-off operation body 119 in the reverse rotation clutch mechanism 103.COPYRIGHT: (C)2014,JPO&INPIT【課題】刈取処理部に対する正転クラッチ機構及び逆転クラッチ機構が同時に入り状態になることを的確に牽制することが可能となるコンバインを提供する。【解決手段】正転用入切操作具の操作に基づいて、エンジンから作業用の正転動力を刈取処理部に対して入り切り自在な正転クラッチ機構92と、逆転用入切操作具の操作に基づいて、エンジンから正転動力とは逆方向の逆転動力を刈取処理部に対して入り切り自在な逆転クラッチ機構103とが備えられ、正転クラッチ機構92におけるクラッチ入り切り用操作体118と、逆転クラッチ機構103におけるクラッチ入り切り用操作体119とを連動連係させることにより、正転クラッチ機構92及び逆転クラッチ機構103が同時に入り状態になることを牽制する牽制機構116が備えられている。【選択図】図8
