PROBLEM TO BE SOLVED: To improve the maintenance and durability of a grain sieve, without causing the structure to become complex and weight-enhancing of a swinging selection mechanism.SOLUTION: The structure for attaching or detaching the grain sieve in a thresher, equipped with the grain sieve 24 capable of sieving grains from a treated product after threshing treatment and installed so as to be present over the right and the left sidewalls 53 and 54 of the swinging selection mechanism 11 is constituted, such that an engaging part 55, enabling the engagement with the right terminal part of the grain sieve 24, is formed at the lower edge part 53A of the right sidewall 53 of the swinging selection mechanism 11 and linking parts 54B and 57, enabling the link with the left terminal part of the grain sieve 24 with a linking tool 62, are formed at the right sidewall 53 so that the grain sieve 24 is constituted detachable to the bottom part of the swinging selection mechanism 11. An opening 34A, that allows the grain sieve 24 to be taken out and put in, is formed in the left side wall 34 of the thresher, and the opening is equipped detachably to a lid body 63 for closing the opening 34A.COPYRIGHT: (C)2009,JPO&INPIT【課題】 構造の複雑化や揺動選別機構の重量化を招くことなく、グレンシーブのメンテナンス性や耐久性の向上を図れるようにする。【解決手段】 揺動選別機構11に、脱穀処理後の処理物から穀粒を篩い分けるグレンシーブ24を、揺動選別機構11の左右の側壁53,54にわたるように装備した脱穀装置のグレンシーブ着脱構造において、揺動選別機構11の右側壁53の下縁部53Aに、グレンシーブ24の右端部との係合を可能にする係合部55を形成し、かつ、右側壁53に、グレンシーブ24の左端部との連結具62による連結を可能にする連結部54B,57を形成して、揺動選別機構11の底部にグレンシーブ24を着脱可能に装備するように構成し、脱穀装置の左側壁34に、グレンシーブ24の抜き差しを許容する開口34Aを形成するとともに、その開口34Aを閉塞する蓋体63を着脱可能に装備した。【選択図】 図7
