PURPOSE: To obviate giving damage to unhulled rice grains while greatly increasing the treating capacity of the rachis-branch-cutting-off action of grains with the rachis- branches. ;CONSTITUTION: The outer peripheral surface of a vertical type cylindrical body 1 formed with rachis-branch-cutting-off holes 2 to the extent of allowing the unhulled rice grains to pass is internally provided with a lifting type rotating cylinder 3 wound with spirals 4. The spacing between the outer peripheral edges of the spirals 4 and the inner peripheral surface of the cylindrical body 1 is set at a spacing M in which the unhulled rice grains are flowable down. In addition, the cylindrical body 1 is enclosed by an outside cylinder 9 to form a fall-down path (a) on the outer periphery, by which the rachis-branchcutting-off action is applied on the unhulled rice grains contg. the grains with the rachis-branches while the grains flow from above to below within the cylindrical body 1 and the unhulled rice grains are discharged from the rachis-branch-cutting-off holes 2. The outer peripheral part of the spirals is provided with a rubbing plate of which the plate plane is intersected diagonally with the rotating direction when viewed from laterally. A good result is obtd. if the outer edge of the rubbing prate is brought near to the inner peripheral surface of the cylindrical body. Further, this treating device alone is installed between a first grain lifting cylinder and a grain tank.;COPYRIGHT: (C)1995,JPO
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