PROBLEM TO BE SOLVED: To successively thin a layer thickness of a material to be sorted with advance from the front side to the rear side and to prevent grain loss in the swinging sorting shelf of a threshing part of combine harvester.SOLUTION: The thresher has a constitution that a sieve positioned at the lower side of the rear end part of a continuing hole (24) among a large number of sieves (29c) is provided with a plurality of front side sieve lines (36) extended backward in the horizontal direction at mutual intervals in an inclined posture in rear rising, a sieve positioned rearward in relation to the rear end part of the continuing hole (24) among the large number of the sieves (29c) is provided with a plurality of rear side sieve lines (37) extended backward in the horizontal direction at mutual intervals in an inclined posture in rear rising, the intervals of the mutual rear side sieve lines (37) are set wider than those of the mutual front side sieve lines (36) and the front side sieve lines (36) are overlapped with the rear side sieve lines (37) in the back and forth direction.COPYRIGHT: (C)2013,JPO&INPIT【課題】コンバイン脱穀部の揺動選別棚において、被選別物の層厚を前側から後側に行くに従って順次薄くし穀粒ロスの防止を図る。【解決手段】多数のシーブ(29c)のうちの前記連通口(24)の後端部下方に位置するシーブに、後方に向けて延出する複数の前側篩い線(36)を左右方向に互いの間隔をおいて後上がり傾斜姿勢で設け、前記多数のシーブ(29c)のうちの前記連通口(24)の後端部よりも後方に位置するシーブには、後方に向けて延出する複数の後側篩い線(37)を左右方向に互いの間隔をおいて後上がり傾斜姿勢で設け、前記前側篩い線(36)同士の間隔よりも後側篩い線(37)同士の間隔を広く設定すると共に、該前側篩い線(36)と後側篩い線(37)を前後方向でオーバーラップさせて配置。【選択図】図1
