PROBLEM TO BE SOLVED: To achieve an efficient arrangement relationship of a winnower fan and a pre-fan, to realize an effective blow action to an oscillation separation shelf, and to improve a wind selection effect.SOLUTION: A threshing device includes: an oscillation separation shelf 11 including a transfer shelf 12 and sieves 13, 14 across an upper part and a rear part of a winnower fan 20 arranged in a front lower side of a threshing chamber 2 and a pre-fan 19 arranged in a front side upper part of the winnower fan 20 and supplying separation air to a rear part of the transfer shelf 12 and the first sieve 13 of the oscillation separation shelf 11 through a separation air passage 26. In the separation air passage 26, a part of a casing 24 of the winnower fan 20 serves as a guide and an upper guide 25 is arranged generally in parallel to the winnower fan casing 24, thereby the air passage facing upward is configured.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】 本発明の課題は、唐箕とプレファンとを有効な配置関係とし、揺動選別棚への送風作用を効果的にならしめ、風選効果を向上させることを目的とする。【解決手段】 本発明は、扱室(2)の前部下方に設けた唐箕(20)の上方及び後方にわたって移送棚部(12)とシーブ部(13,14)を有した揺動選別棚(11)を設け、前記唐箕(20)の前側上方には、揺動選別棚(11)の移送棚部(12)後部とファーストシーブ部(13)に選別風路(26)を通じて選別風を供給するプレファン(19)を設け、前記選別風路(26)は、前記唐箕(20)のケーシング(24)の一部をガイドとし、且つ、該唐箕ケーシング(24)と略平行に上部ガイド(25)を設けて上向きの風路を構成する。【選択図】 図1
