| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that ear breakages or the like tend to occur, when the angular portions of threshing teeth collide with grain straws on threshing, because the threshing teeth formed in a comb-like shape have corner portions at the edges.SOLUTION: A thresher is provided with many plate members 52 having many round hole portions 52b and threshing teeth 52a projected in a tapered state in the outer diameter direction on the outer peripheral surface of a threshing cylinder mounted in a threshing chamber, and chamfered portions 52c or round portions formed at the edges of the rotation direction downstream side surfaces of the threshing teeth 52a. When the threshing teeth 52a collide grain straws, impacts are softened due to the chamfered portions 52c or round portions. |
