PROBLEM TO BE SOLVED: To raise efficiency of threshing separation work by making a scraper for chaff sieve cleaning provided in a threshing device automatically operate at an optimal timing.SOLUTION: The threshing device is configured to operate the scraper (34) which scrapes off the waste straw adhering to a first chaff sieve (53), when a layer thickness sensor (43) detects layer thickness more than a certain level, while providing: a threshing net (74) in a lower part of a threshing room (66) which pivots a threshing cylinder (69) a shaking shelf (51) which sorts out a sorted out object while carrying out reciprocal swinging back and forth at a lower part of the threshing net (74) a transfer shelf (52), the first chaff sieve (53), and a second chaff sieve (54) sequentially from transfer direction sending side of the sorted out object in the shaking shelf (51) and a layer thickness sensor (43) on transfer shelf (52), which detects layer thickness of the sorted out object which passes through the transfer shelf (52) on transfer shelf (52).COPYRIGHT: (C)2012,JPO&INPIT【課題】脱穀装置に設けるチャフシーブ清掃用のスクレーパを自動的に最適なタイミングで作動させることで、脱穀選別作業の能率を高める。【解決手段】扱胴(69)を軸支した扱室(66)の下部に扱網(74)を設け、該扱網(74)の下方に前後に往復揺動しながら被選別物を選別する揺動棚(51)を設け、該揺動棚(51)には、移送棚(52)と第1チャフシーブ(53)と第2チャフシーブ(54)を被選別物の移送方向上手側から順に備え、移送棚(52)上に該移送棚(52)上を通過する被選別物の層厚を検出する層厚センサ(43)を設けると共に、該層厚センサ(43)が一定以上の層厚を検出したときに第1チャフシーブ(53)に付着する藁屑を掻き落とすスクレーパ(34)を作動させる構成とする。【選択図】図5
