PROBLEM TO BE SOLVED: To prevent the generation of stained granules caused by rust even when a base material of a constituent member is exposed by the wear or peeling-off of a water-repellent material when the treating material-contacting surface of a component constituting a selection part is covered with the water-repellent material.SOLUTION: In the general-purpose combine harvester 1 equipped with a threshing chamber 7 for threshing grains from grain culms, and a selection part 12 for selecting a treated product leaked down from the threshing chamber 7, at least a part of the constituent component (e.g. a grain pan 19) of the selection part 12 is formed of a stainless steel material 19a, and covered with the water-repellent material 19b in the treating material-contacting surface thereof.COPYRIGHT: (C)2012,JPO&INPIT【課題】選別部を構成する部品の処理物接触面を撥水性材料で覆うにあたり、撥水性材料の摩耗や剥がれによって構成部品の基材が露出しても、錆に起因する汚粒の発生を防止する。【解決手段】茎稈から穀粒を脱穀する扱室7と、扱室7から漏下した処理物を選別する選別部12とを備える汎用コンバイン1において、選別部12の少なくとも一部の構成部品(例えば、グレンパン19)を、ステンレス材19aで形成すると共に、その処理物接触面を撥水性材料19bで覆う。【選択図】図3
