| 摘要 |
The method of the present invention is intended to be used in association wi th a headed fastener such as a tree nut, but not limited to a tree nut. The present method contemplates embodiments of a riveting pin having protuberanc es that cause the flared end of the shaft(13) to be flared in one or more discontinuous portions of the circumference of the shaft, whereby "push out" and "spin-out" are deterred. Where the length of the fastener shaft(13) is n o longer than the thickness of the material(2) through which it is inserted, a first design of flaring pin is provided. Where the length of the shaft of th e fastener employed is greater than the thickness of the material through whic h it extends, a second embodiment of flaring pin is employed. In the former case, at least one discrete portion(67,69,71,73) of the circumference of the shaft is flared into the wall of the passageway through which the shaft(13) extends. In the latter case, at least one portion of the circumference of th e shaft enters the wall of the passageway and at least one other portion folds over the exterior surface of the material. |
