| 摘要 |
PROBLEM TO BE SOLVED: To provide a threshing concave having an improved threshing capacity by reducing an amount of grains and cut culms accumulated between a grain culm-carrying-in opening of a threshing chamber and the threshing concave. SOLUTION: The threshing concave 4 has a perforated plate 37 having many leaking holes 35, and a flat flame 40 in the vertical direction, integrally formed with the perforated plate 37 along the periphery part of the perforated plate 37. Small holes having areas smaller than those of the leaking holes 35 can be formed so as to be positioned between the leaking holes 35 and the frame 40 because the threshing concave 4 is constituted by attaching the flat frame 40 in the vertical direction along the outer periphery of the perforated plate 37. As a result, the grains and the cut culms accumulated between the grain culm-carrying-in opening of the threshing chamber and the leaking holes 35 are reduced by leaking the grains and the cut culms from the small holes 36 to improve the threshing capacity. COPYRIGHT: (C)2004,JPO
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