PROBLEM TO BE SOLVED: To solve problems with a thresher wherein the effectiveness of removing substances adhering to a sheave is low and wherein the maintenance is troublesome.SOLUTION: A wind sorting chamber 18 is disposed under a threshing chamber 11, and a swinging sorting shelf 20 which swings back and forth is disposed in the wind sorting chamber 18. The sheave 23 in which a plurality of fins 36 are arranged parallel for sorting grains and waste straws etc. is disposed in the swinging sorting shelf 20. The sheave 23 is composed of a front sheave 26 disposed on the upstream side of a culm outlet 25 at the rear end of the threshing chamber 11 and a rear sheave 27 disposed under and on the downstream side of the culm outlet 25. A front scraper 40 and a rear scraper 41 with a plurality of sliding contact members 50 to slide in contact with the fins 36 of the front sheave 26 and the rear sheave 27 in the direction crossing the swinging direction of the swinging sorting shelf 20 are respectively disposed in the front sheave 26 and in the rear sheave 27. The front scraper 40 and the rear scraper 41 are detachably attached together with the front sheave 26 and the rear sheave 27 respectively to the swinging sorting shelf 20.COPYRIGHT: (C)2012,JPO&INPIT【課題】シーブの付着物の除去効果が低いこと、メンテナンスが面倒であること。【解決手段】脱穀室11の下方に風選室18を設け、該風選室18に往復揺動する揺動選別棚20を設け、該揺動選別棚20には、穀粒と藁屑等とを選別するフィン36を揺動方向に複数並設したシーブ23を設け、該シーブ23は脱穀室11の後端の排稈口25よりも上手側に設けた前側シーブ26と、前記排稈口25の下方から下手側に設けた後側シーブ27とにより構成し、前側シーブ26と後側シーブ27の夫々には、前側シーブ26および後側シーブ27のフィン36に夫々摺接する摺接部材50を前記揺動選別棚20の揺動方向に対する交差方向に複数備えた前側スクレーパ40と後側スクレーパ41を設け、該前側スクレーパ40と後側スクレーパ41は、前側シーブ26および後側シーブ27と共に、揺動選別棚20に対して着脱自在に取付ける構成としたことを特徴とする脱穀装置。【選択図】図2
