PROBLEM TO BE SOLVED: To solve problems of reduction of selection efficiency and troublesome maintenance due to clogging of a selection net.SOLUTION: A threshing device includes: a threshing chamber 20 formed by arranging a threshing net 22 below a threshing cylinder 21 a wind selection chamber 25 arranged below the threshing chamber 20 and performing wind selection by means of wind sent from a winnowing fan 23 an oscillating selection shelf 26 moved in reciprocating/oscillating in the wind selection chamber 25 a sieve 29 arranged in the oscillating selection shelf 26 and including plural fins 42 selecting grains and waste straw and arranged parallelly in an oscillation direction a first conveyor 30 at a predetermined position below the oscillating selection shelf 26 a second conveyor 31 in a rear side of the first conveyor 30 a second lifting machine 33 lifting secondary products collected by the second conveyor 31 a secondary reduction device 35 reducing the secondary products at a predetermined position above the sieve 29 and having a base part connected with the second lifting machine and a scraper 40 arranged on the sieve 29 below an opened portion of a secondary reduction port 36 of the secondary reduction device 35 and removing objects adhered on the sieve 29.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT【課題】選別網の詰まりによる選別効率の低下、メンテナンスが面倒であること。【解決手段】扱胴21の下側に扱網22を設けて脱穀室20を形成し、該脱穀室20の下方に唐箕23からの送風により風選する風選室25を設け、該風選室25に往復揺動する揺動選別棚26を設け、該揺動選別棚26には、穀粒と藁屑とを選別するフィン42を揺動方向に複数並設したシーブ29を設け、揺動選別棚26の下方所定位置に一番コンベア30を設け、一番コンベア30の後側に二番コンベア31を設け、二番コンベア31により回収した二番物を揚穀する二番昇降機33に、前記シーブ29の所定位置上方に二番物を還元する二番還元装置35の基部を接続し、二番還元装置35の二番還元口36を開口させた部分の下方のシーブ29には該シーブ29に付着した付着物を除去するスクレーパ40を設けた脱穀装置。【選択図】図2
