PROBLEM TO BE SOLVED: To facilitate maintenance work of a flow-down promotion device of a grain tank.SOLUTION: A combine includes: a grain tank 5 storing harvested grains and a conveyance spiral 20A arranged in a bottom part of the grain tank 5 and conveying the grains to outside. The combine includes: a reciprocating rotation shaft 31 driven to rotate while reciprocating and arranged at a position on an upper side of the conveyance spiral 20A in the grain tank 5 and an agitation rod 32 arranged on the reciprocating rotation shaft 31 and agitating the grains in the grain tank 5 to flow down to the conveyance spiral 20A side. A front part of the reciprocating rotation shaft 31 is supported rotatably by a front lid 34 covering an opening 33 formed in a front wall 5A of the grain tank 5 and a rear part of the reciprocating rotation shaft 31 is supported rotatably by a rear wall 5B of the grain tank 5.SELECTED DRAWING: Figure 8COPYRIGHT: (C)2017,JPO&INPIT【課題】グレンタンクの流下促進装置の整備作業を容易化する。【解決手段】収穫された穀粒を貯留するグレンタンク(5)を備え、このグレンタンク(5)の底部に、穀粒を外部へ搬送する搬送螺旋(20A)を備えたコンバインにおいて、グレンタンク(5)の内部における前記搬送螺旋(20A)の上側の位置に、往復回転駆動される往復回動軸(31)を設け、この往復回動軸(31)に、グレンタンク(5)内の穀粒を撹拌して前記搬送螺旋(20A)側へ流下させる撹拌棒(32)を設け、往復回動軸(31)の前部を、グレンタンク(5)の前壁(5A)に形成された開口部(33)を覆う前蓋(34)に回転自在に支持し、往復回動軸(31)の後部を、グレンタンク(5)の後壁(5B)に回転自在に支持する。【選択図】 図8
