PROBLEM TO BE SOLVED: To provide a grain threshing apparatus, maintaining high threshing performance by preventing the cylindrical part of a threshing cylinder from being deformed.SOLUTION: The problem is solved by providing the grain threshing apparatus including: a front support member (13) for supporting the front end part of a cylinder body (61) on the front of a threshing cylinder shaft (12) a rear support member (15) for supporting the rear end part of the cylinder body (61) at the rear of the threshing cylinder shaft (12) and an intermediate part support member (14) for supporting the longitudinally intermediate part of the cylinder body (61) on the threshing cylinder shaft (12), wherein the intermediate part support member (14) is disposed in a region biased to the front side more than the longitudinally central part of the cylinder body (61).COPYRIGHT: (C)2013,JPO&INPIT【課題】扱胴の筒部の変形を防止し、高い脱穀性能を維持する脱穀装置を提供する。【解決手段】上記課題は、筒体(61)の前端部を扱胴軸(12)の前部に支持する前部支持部材(13)と、筒体(61)の後端部を扱胴軸(12)の後部に支持する後部支持部材(15)と、筒体(61)の前後方向中間部を扱胴軸(12)に支持する中間部支持部材(14)を備え、中間部支持部材(14)を、筒体(61)の前後方向中央部よりも前側に偏倚する部位に配置することにより解決される。【選択図】図7
