PROBLEM TO BE SOLVED: To discharge grains more easily and quickly by a grain discharge device including an extensible conveyance cylinder.SOLUTION: An extensible second conveyance cylinder (30) includes an inside cylinder (32) connected to a tip (20b) of a first conveyance cylinder (20), and an outside cylinder (31) fitted to the outer periphery of the inside cylinder (32) movably in the extension direction. A base end part (32a) of the inside cylinder (32) is inserted into the tip (20b) of the first conveyance cylinder (20) and fixed, and the inner diameter of the inside cylinder (32) is set to be smaller than the inner diameter of the first conveyance cylinder (20) and the inner diameter of the outside cylinder (31).SELECTED DRAWING: Figure 8COPYRIGHT: (C)2017,JPO&INPIT【課題】本発明の課題は、伸縮可能な搬送筒を備えた穀粒排出装置において、穀粒をより容易かつ速やかに排出可能とすることである。【解決手段】伸縮可能な第2搬送筒(30)に、第1搬送筒(20)の先端部(20b)に接続された内側筒(32)と、この内側筒(32)の外周に伸縮方向へ移動自在に嵌合された外側筒(31)を備え、内側筒(32)の基端部(32a)を第1搬送筒(20)の先端部(20b)に挿入して固定し、内側筒(32)の内径を第1搬送筒(20)の内径および外側筒(31)の内径よりも小径に設定する。【選択図】図8
