| 摘要 |
<p>A support member (20) that supports a support yoke (18) is received by an intermediate member (21). Along with progress of abrasion of the support yoke (18), a rotational force applying spring rotates the intermediate member (21). A cam mechanism (24) formed in facing portions of the intermediate member (21) and the support member (20) drives the support member (20) toward the support yoke (18). A set length regulation mechanism (30) that regulates a set length (L1) of a coned disc spring (29) includes a recessed portion (44) in a rear face (18b) of the support yoke (18), and a projection shaft (45) fixed to a front face (20a) of the support member (20). A nut (46) that receives the washer (28) abuts on a positioning stepped portion (48) of a distal end portion (45b) of the projection shaft (45).</p> |
