| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a straw cutting blade with excellent cutting performance and durability.SOLUTION: A straw cutting blade is constituted as follows: blade plate parts 4 are projected in parallel at the right and left of a mounting plate part 3 which mounts a plate 2 bent in U-shaped to a threshing part. At an edge part of the blade plate part 4, an uneven blade edge 7, with which a sharp top part 5 and a sharp valley part 6 are continuously formed from a base end part to a projection tip part of the blade plate part 4, is formed. A blade height dimension H of the uneven blade edge 7 on a projection tip side of the blade plate part 4 is formed so as to be higher than a blade height dimension H of the uneven blade edge 7 on a base end side of the blade plate part 4. An adjacent pitch P of the sharp top part 5 on the projection tip side of the blade plate part 4 is set so as to be wider than an adjacent pitch P of the sharp tip part 5 on the base end side of the blade plate part 4.</p> |
