PROBLEM TO BE SOLVED: To enhance efficiency of grain unloading operation in spite of easy maintenance by rotating a grain storage device to the outside of a machine.SOLUTION: The grain unloading apparatus of a combine harvester includes such a constitution that one side part of a first cylindrical member (2) is fixed on the lower side face of the grain storage device (1), the other side part of the first cylindrical member (2) and one side part of a second cylindrical member (4) fixed on a machine frame (3) side are pivotably supported connectably and separably on a first vertical axis (5), the other side part of the second cylindrical member (4) and one side part of a third cylindrical member (7) equipped with a conveying cylinder (6) are relatively rotatably connected around the shaft center of a conveying screw (8) mounted on the bottom of the grain storage device (1), and a locking device (9) for fixing the rotation position of the third cylindrical member (7) or the conveying cylinder (6) with the shaft center of the conveying screw (8) as a center is installed. The locking device (9) includes a first locking device (9a) for fixing the third cylindrical member (7) and a second locking device (9b) for fixing the middle part of the conveying cylinder (6).COPYRIGHT: (C)2013,JPO&INPIT【課題】穀粒貯留装置を機体外側方へ回動させてメンテナンスを容易に行なえるものでありながら、穀粒排出作業の効率を高める。【解決手段】穀粒貯留装置(1)の下部側面に第1筒部材(2)の一側部を固定し、第1筒部材(2)の他側部と機体フレーム(3)側に固定した第2筒部材(4)の一側部とを接合および分離自在に第1縦軸(5)で軸着し、第2筒部材(4)の他側部と搬送筒(6)を備えた第3筒部材(7)の一側部とを、穀粒貯留装置(1)の底部に備えた搬送螺旋(8)の軸心を中心として相対回動自在に接合し、搬送螺旋(8)の軸心を中心とした第3筒部材(7)または搬送筒(6)の回動位置を固定するロック装置(9)を設ける。ロック装置(9)は、第3筒部材(7)を固定する第1ロック装置(9a)と、搬送筒(6)の中間部を固定する第2ロック装置(9b)から構成する。【選択図】 図5
