To allow crops to be smoothly raked by a raking part irrespective of amounts or lengths of the crops in a thresher in which crops fed into a threshing chamber are raked toward the rear of a threshing cylinder by the raking part in the front part of the threshing cylinder, and are subjected to threshing processing by a threshing processing part.SOLUTION: A raking part 30 includes a tapered base part 31 whose diameter becomes smaller toward the front end side of a threshing cylinder 15, and a spiral blade 32 provided in the outer peripheral part of the base part 31. The maximum outer diameter D1 in a starting end part 32A of the spiral blade 32 is larger than the maximum outer diameter D2 in a part 32B other than the starting end part of the spiral blade 32.SELECTED DRAWING: Figure 2【課題】扱室に投入される作物が扱胴前部の掻込み部によって扱胴の後方に向けて掻き込まれて扱き処理部によって扱き処理される脱穀装置において、作物の量や長さなどに関係なく作物が掻込み部によってスムーズに掻き込まれるようにする。【解決手段】掻込み部３０に、扱胴１５の前端側ほど小径である先細り状の基台部３１と、基台部３１の外周部に設けられた螺旋羽根３２と、が備えられている。螺旋羽根３２の始端部３２Ａにおける最大外径Ｄ１が螺旋羽根３２の始端部以外の部分３２Ｂにおける最大外径Ｄ２よりも大きい。【選択図】図２
