PROBLEM TO BE SOLVED: To provide a reversing mechanism capable of smoothly performing work even with sticking of mud, catching of cut straw, etc., in the case where a reverse driving shaft reversed by hand is located close to the field when reversing a grain culm conveyor of a pretreatment section.SOLUTION: One end of a driving shaft in a horizontal cylinder 10 which is the turning center of the pretreatment section is arranged projecting outward from the horizontal cylinder 10, and the reverse driving of the driving shaft is attained by this projecting part P1.COPYRIGHT: (C)2013,JPO&INPIT【課題】前処理部の穀稈搬送装置を逆転する際に、手動で逆転する逆転駆動軸が圃場に近い位置にあると、泥の付着や切藁の引っ掛かり等によってスムースに作業を行える逆転機構を提供する。【解決手段】前処理部の回動中心である横筒10内の駆動軸の一端を該横筒10の外方に突出して配置し、該突出部P1にて前記駆動軸を逆転駆動し得るように構成した。【選択図】図4
