| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rim lock mechanism whose structure can be simplified and processing cost can be suppressed. <P>SOLUTION: A plurality of first through holes 11a to 11d are pierced into a lower rim holding member 7. A plurality of second through holes 12a to 12c are pierced into a shaft 8. Height and a penetration direction of any one of the first through holes 11a to 11d are made coincide with that of any one of the second through holes 12a to 12c, and a pin 9 is inserted/ejected into/from the first through hole and the second through hole whose height and penetration direction coincide with each other, thereby to fix an interval of a pair of rims 5, 6 or release the fixing of the interval. <P>COPYRIGHT: (C)2013,JPO&INPIT |
