| 摘要 |
PROBLEM TO BE SOLVED: To reduce wear of both side corner portions, corner adapters and corner teeth and a torsion load applied to a structure including both side plates while using the corner adapters in common as intermediate adapters, and to improve efficiency and reliability in welding side plates to the corner adapters. SOLUTION: Both right and left side portions 9a, 9a of the tip surface of a cutting edge 9 are inclined in dogleg shape with respect to intermediate portions 9b, 9b. The right and left corner adapters 11A, 11A mounted to the inclined portions 9a, 9a are thereby fitted in a state of inclining to open outward toward the tip at the same angle α as the inclination angle of both side plates 8, 8 and locating the tips of the adapters (the corner teeth) on the cutting edge side rather than the tips of the intermediate adapters (intermediate teeth). Side edges 10, 10 of both side plates 8, 8 are joined to the corner adapters 11A, 11A on the center lines of the corner adapters 11A, 11A. COPYRIGHT: (C)2011,JPO&INPIT |
