| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To stably keep a position of a lug with high precision for improving workability of lug mounting and lug removal. <P>SOLUTION: The lug base 12 is mounted on a drum shell body 11, and the lug 13 for supporting a fastening bolt 14 is held in the lug base 12. A lug movement restrain means is provided between the lug base 12 and the lug 13. The lug movement restrain means includes: a cylindrical shaft-shape portion 28 provided on the lug 12, and two planar portions 25 and 25 provided on the lug base 13, and each of the two planar portions 25 and 25 extend substantially parallel to the longitudinal axis of the shaft-shape portion 28 so as to be contacted in line. Taper face portions 22 and 35 are provided in the lug base 12 and the lug base 13 respectively, and the taper face portions 22 and 35 are fastened to each other, when the shaft-shape portion 28 is separated from each of the plane portions 25 and 25. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
