PROBLEM TO BE SOLVED: To provide a combine capable of performing normal and reverse rotation driving of a harvesting unit while preventing both a normal rotation clutch and a reverse rotation clutch from being operated to a turn-on state, which can be acquired with a simple structure from an aspect of the linkage of the clutch and a clutch operating tool.SOLUTION: The combine is provided with the normal rotation clutch that transmits normal rotation drive force to the harvesting unit, and a reverse rotation clutch 41 that transmits reverse rotation drive force to the harvesting unit. A normal rotation clutch operating tool 52 for performing a switching operation of the normal rotation clutch, and a reverse rotation clutch operating tool 54 for performing a switching operation of the reverse rotation clutch 41 are provided separately. A checking mechanism 70 is provided which, when the normal rotation clutch is in a turn-on state, is switched to an operation state in which the switching operation to a turn-on state of the reverse rotation clutch 41 is checked, and which, when the normal rotation clutch is in a turn-off state, is switched to a release state in which the checking is released.COPYRIGHT: (C)2014,JPO&INPIT【課題】正回転クラッチと逆回転クラッチとが共に入り状態に操作されることを防止しながら刈取り部を正逆転駆動できて、クラッチとクラッチ操作具との連係の面から構造簡単に得ることができるコンバインを提供する。【解決手段】刈取り部に正回転駆動力を伝達する正回転クラッチと、刈取り部に逆回転駆動力を伝達する逆回転クラッチ41とを備えてある。正回転クラッチを切換え操作する正転クラッチ操作具52と、逆回転クラッチ41を切換え操作する逆転クラッチ操作具54とを別々に設けてある。正回転クラッチが入り状態にあると、逆回転クラッチ41の入り状態への切換え操作を牽制した作用状態に切り換わり、正回転クラッチが切り状態にあると、牽制を解除した解除状態に切り換わる牽制機構70を設けてある。【選択図】図7
