THRESHING UNIT STRUCTURE OF THRESHING DEVICE

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.