PROBLEM TO BE SOLVED: To provide a grain-discharging device of a combine harvester, which can reduce the total height of the combine harvester to facilitate the storage of the combine harvester in a barn, a storehouse, or the like, and which can smoothly slide a movement-side carrier cylinder to efficiently adjust the expansion or contraction of the grain-discharging device.SOLUTION: The grain-discharging device of the combine harvester comprises: the movement-side carrier cylinder (14) which slides in an axial direction with respect to a fixed-side carrier cylinder (12), and which is internally fitted with an expandable/contractible carrier screw (13) a spiral shaft (23) for expansion/contraction drive, which slides the movement-side carrier cylinder (14) with respect to the fixed-side carrier cylinder (12) and a guide roller (31) for sliding and guiding the movement-side carrier cylinder (14) respect to the fixed-side carrier cylinder (12). The spiral shaft (23) is arranged in such a manner as to be biased to either of the right and left sides of the fixed-side carrier cylinder (12) by avoiding a top portion of the fixed-side carrier cylinder (12).COPYRIGHT: (C)2008,JPO&INPIT【課題】 コンバインの全高を低くして、納屋、倉庫などへの格納を容易に行えるものとすると共に、移動側搬送筒の摺動を円滑に行えるものとして穀粒排出装置の伸縮調節を能率良く行えるものとする。【解決手段】 固定側搬送筒(12)に対して軸芯方向に摺動すると共に伸縮自在な搬送螺旋(13)を内装した移動側搬送筒(14)と、該移動側搬送筒(14)を固定側搬送筒(12)に対して摺動させる伸縮駆動用の螺子状軸(23)と、固定側搬送筒(12)に対して移動側搬送筒(14)を摺動案内するガイドローラ(31)とを備え、螺旋状軸(23)を、固定側搬送筒(12)の頂部を避けて該固定側搬送筒(12)の左右一側部に偏倚させて配置する。【選択図】 図4
