PROBLEM TO BE SOLVED: To make an operator recognize that an operation for changing an operation state to moving travel is changed from a low-speed operation or middle-speed operation by a simple structure.SOLUTION: When a speed change lever 53 is operated from a low-speed position L or middle-speed position M to a high-speed position H, a clutch change body 70 is changed from a waiting position B to an action position A by the speed change lever 53 in sliding contact with a low-speed side cam part 77 or middle-speed side cam part 78 and a threshing clutch lever 54 is changed to a disengagement position OFF by a change action part 74. An operation reaction force to be applied to the speed change lever 53 that is in sliding contact with the low-speed side cam part 77 and changes the clutch change body 70 is larger than an operation reaction force to be applied to the speed change lever 53 that is in sliding contact with the middle-speed side cam part 78 and changes the clutch change body 70.COPYRIGHT: (C)2012,JPO&INPIT【課題】作業状態から移動走行に切り換える操作が低速作業と中速作業のいずれからの切換えであるかを構造簡単に認識させることができるようにする。【解決手段】変速レバー53が低速位置L又は中速位置Mから高速位置Hに操作されると、クラッチ切換え体70が低速側カム部77又は中速側カム部78に摺接する変速レバー53によって待機位置Bから作用位置Aに切換え操作されて切換え作用部74によって脱穀クラッチレバー54を切り位置OFFに切換え操作する。低速側カム部77に摺接してクラッチ切換え体70を切換え操作する変速レバー53に対して付与する操作反力が、中速側カム部78に摺接してクラッチ切換え体70を切換え操作する変速レバー53に対して付与する操作反力よりも大になる。【選択図】図8
