| 摘要 |
<p>An expanding fastener has a shaft (4) which at its front end passes into an axially slotted expanding region (6) with a plurality of expanding ridges. The expanding ridges (7) can be expanded over an expanding element (11, 12) which can be driven into the expanding region (6). The expanding element (11) has a cylindrical pin (4) at the rear end of which is an outwardly distortable collar (20). When the expanding fastener is driven in, the collar (20) comes into contact with a rear wall (26) of a rivet chamber and is thereby distorted into an annular ring so that the expanding element (11) is riveted into the rivet chamber and prevented from falling out of the expanding region (6).</p> |
