PROBLEM TO BE SOLVED: To prevent a decrease in grain recovery efficiency due to free grains over rack, while economically performing measures on the occurrence of deformation or fracture in a guide plate, and effectively suppress a decrease of threshing performance.SOLUTION: A threshing unit structure of a threshing device includes: a holding and conveying mechanism 6 for holding the plant foot sides of reaped grain culms and conveying the reaped grain culms a threshing cylinder for threshing the ear side of the reaped grain culms conveyed with the holding and conveying mechanism 6 by being rotationally driven and a guide plate 47 guiding the grain flowing down to the plant foot sides of the reaped grain culms toward the threshing cylinder with the rotation of the threshing cylinder. The guide plate 47 is constituted of a plurality of plate bodies 48, 49 aligned in the conveying direction of the reaped grain culms at the upper position to the reaped grain culms conveyed by the holding and conveying mechanism 6. The plurality of plate bodies 48, 49 are butted and arranged so that the rear edge 48A of the front side plate body 48 being adjacent to the front and rear comes into contact with the front end edge 49A of the rear side plate body 49.COPYRIGHT: (C)2014,JPO&INPIT【課題】ガイド板に変形や欠損などが生じた場合の対処を経済的に行えるようにしながら、ささり粒による穀粒回収効率の低下を防止するとともに、脱穀性能の低下などを効果的に抑制できるようにする。【解決手段】刈取穀稈の株元側を挟持して刈取穀稈を搬送する挾持搬送機構6と、回転駆動されることにより、挟持搬送機構6により搬送される刈取穀稈の穂先側に扱き処理を施す扱胴と、扱胴の回転に伴って刈取穀稈の株元側に流下する穀粒を扱胴に向けて案内するガイド板47とを備え、ガイド板47を、挟持搬送機構6により搬送される刈取穀稈に対する上方の位置に、刈取穀稈の搬送方向に沿って整列配置される複数の板体48,49で構成し、複数の板体48,49を、前後に隣接する前側の板体48の後端縁48Aと後側の板体49の前端縁49Aとが接するように突き合わせ配置してある。【選択図】図3
