PROBLEM TO BE SOLVED: To solve the problem in which a grain culm transport device is reversed by causing a tool to engage with a projection of a transmission shaft for transmitting a power to a pretreatment part, in the case where a clog occurs in the grain culm transport device of a pretreatment part.SOLUTION: At an ordinary combine-harvester working time, the power of an engine E is transmitted to a pretreatment part through a transportation HST 13, a normal rotation output shaft 21 and a normal rotation (cutting) clutch 51. In the case where the pretreatment part is clogged, the power of the engine E is transmitted to the pretreatment part through the transportation HST 13, a deceleration gear train 25, a reversing output shaft 23 and a reverse clutch 53.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2017,JPO&INPIT【課題】前処理部の穀稈搬送装置に詰りが発生した場合、前処理部へ動力を伝達する伝動軸の突出部に工具を係合して、穀稈搬送装置を逆転していた。【解決手段】通常のコンバイン作業時にあっては、エンジンEの動力は、搬送HST13、正転用出力軸21及び正転(刈取)クラッチ51を介して前処理部に伝達する。前処理部に穀稈詰りが発生した場合、エンジンEの動力は、搬送HST13、減速ギヤ列25、逆転用出力軸23及び逆転クラッチ53を介して前処理部に伝達される。【選択図】図4
