The present invention while improving the hit efficiency by of frame, the prevention or the residence of Koku cutting in the vicinity of the boundary between the spiral blade and the thresher frame to provide a thresher that can be reduced. frame A yd n (m is an integer of 2 or more, n represents a multiple of 3) is the pitch between is a P (P is a positive number), the maximum from the forward end the first sequence distance to the center of the front are respectively L, L + a (P / 3) and L + (2P / 3), including frames of the second sequence and a third sequence. One frame of the third sequence is most closely located to the rear end of one spiral blade of the m pieces of spiral blade regard to the criteria and the circumferential position the axis of the thresher axis, thresher axis in the forward rotational direction downstream, frame of the third sequence, one frame of the first and second sequences, as well as other frames of the first and second sequences are arranged.FIELD 16【課題】扱歯フレームの扱歯による打撃効率を向上させつつ、螺旋羽根と扱胴フレームとの境界近傍における刈取穀稈の滞留を防止乃至は低減させ得る扱胴を提供する。【解決手段】m×n本(mは2以上の整数、nは3の倍数)の扱歯フレームは、扱歯間のピッチがP(Pは正数)とされており、前端部から最前方の扱歯の中心までの距離がそれぞれL、L+(P/3)及びL+(2P/3)とされた第1配列、第2配列及び第3配列の扱歯フレームを含む。第3配列のうちの一の扱歯フレームが扱胴軸の軸線を基準とした周方向位置に関しm枚の螺旋羽根のうちの一の螺旋羽根の後端部に最も近接配置され、扱胴軸の回転方向下流側へ順に、第3配列の扱歯フレーム、第1及び第2配列の一方の扱歯フレーム、並びに、第1及び第2配列の他方の扱歯フレームが配置されている。【選択図】図16
