PROBLEM TO BE SOLVED: To solve a problem that a lateral width of a machine body becomes large since a reverse rotation mechanism is provided to be coaxial with a driving shaft (a reaping input shaft) of a conveyance elevator and that maintenance work becomes troublesome since the reverse rotation mechanism is configured by a bevel gear and has a complicated structure.SOLUTION: A combine-harvester is provided with a reverse rotation mechanism 20 which is branched from the midway of a transmission route for driving a reaping device 4 to rotate normally by rotation power of an engine 21 and transmits to the reaping device 4 by reversing a rotational direction directed by the engine 21. The reverse rotation mechanism 20 is constituted of a pair of upper and lower side spur gears 25, 26 respectively provided on a reaping input shaft 22 provided on a conveyance elevator 14 and a reverse rotation input shaft 24 in parallel with the reaping input shaft 22, and the reaping input shaft 22 and the reverse rotation input shaft 24 are provided on a reaping supporting part 27 which supports the conveyance elevator 14 to ascend and descend.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】逆転機構を、搬送エレベータの駆動軸(刈取入力軸)と同軸上に設けているので、機体の左右幅が大きくなり、また、逆転機構は、傘歯車により構成しているため、構造が複雑になり、メンテナンス作業が面倒になるという課題がある。【解決手段】エンジン21の回転動力によって刈取装置4を正転駆動する伝動経路の途中から分岐して、エンジン21からの回転方向を逆転させて刈取装置4へ伝達する逆転機構20を設け、該逆転機構20は、前記搬送エレベーター14に設けた刈取入力軸22と該刈取入力軸22と平行な逆転入力軸24との夫々に設けた一対の上下側平歯車25、26で構成し、刈取入力軸22および逆転入力軸24は前記搬送エレベーター14を上下昇降自在に支持する刈取支持部27に設けたコンバイン。【選択図】図2
