| 摘要 |
<p>A pair of locking projecting pieces 19, 19 which are provided individually at both circumferential end edges of an outer shim plate 4a are brought into engagement with locking through holes 16, 16 which are formed in base end portions of a pair of locking bent portions 15, 15 which are provided individually at both circumferential end portions of an inner shim plate 3a, whereby the separation of both the shim plates 3a, 4a is prevented. Inner locking pieces 8d, 8e, 8f and outer locking pieces 13d, 13e, 13f which are formed on the shim plates 3a, 4a, respectively, and which are brought into engagement with circumferential edge portions of a pressure plate 2a are never fittingly superposed on each other, and therefore, the projection thereof from inward and outward circumferential edges of the pressure plate 2a is suppressed.</p> |
