PROBLEM TO BE SOLVED: To provide a sieve case structure of a thresher, which finely adjusts the opening of a chaff sieve and is easily processed.SOLUTION: An operation tool is equipped with one side slotted holes 91 and 93 the lateral side plate of the sieve case is equipped with sieve case side hole parts 97 and 98 stopper insertion ports 96 are formed between projections which adjoins in the longitudinal direction of one side slotted holes 91 and 93, and the stoppers 60 are inserted into the stopper insertion ports 96 and fixed so that the opening of the chaff sieve can be changed. The heights and the positions of the projections are set so that an interval between the projections and an edge opposing the width direction of the one side slotted holes 91 and 93 to the projection is smaller than the diameters of the stoppers 60 and a distance between centers of adjacent stopper insertion ports 96 is smaller than the diameters of the stoppers 60.COPYRIGHT: (C)2012,JPO&INPIT【課題】チャフシーブの開度を細かく調節することができ、加工が容易な脱穀装置のシーブケース構造を提供する。【解決手段】操作具に一方側長穴91,93を設け、シーブケースの横側板にシーブケース側穴部97,98を設け、一方側長穴91,93の長手方向に隣り合う突起の間に止め具挿入口96を形成し、止め具挿入口96に止め具60を挿入して固定することでチャフシーブの開度を変更可能に構成してあり、突起と該突起に対して一方側長穴91,93の幅方向に対向する縁部との間隔が止め具60の直径よりも小さく、且つ隣り合う止め具挿入口96の中心間の距離が止め具60の直径よりも小さくなるように、突起の高さおよび突起の位置を設定してある。【選択図】図5
