Patent ID: 8793860
Filing Date: 2014-08-05
Classification: F16B,Y10T

Abstract:
1. A method for mounting a metal collar in a mounting hole of a resin component using a fastening tool, a screw mandrel with male threading, and a jig having an upper surface and further having female threading for engaging the male threading of the screw mandrel, wherein the metal collar having a sleeve defining a through-hole and further having a flange formed on one end of the sleeve, the sleeve having an end surface of a leading end opposite that of the flange, and wherein the fastening tool having a nosepiece defining a lower surface for engaging the resin component, comprising the steps of: (a) inserting the sleeve of the metal collar from below into the mounting hole of the resin component, and setting the metal collar so that the flange of the metal collar abuts the upper surface of the jig; (b) inserting the screw mandrel of the fastening tool into the through-hole of the metal collar, and rotating the screw mandrel in the forward direction so that the male threading of the screw mandrel engages the female threading of the jig; (c) abutting the lower surface of the nosepiece of the fastening tool against the end surface of the leading end of the metal collar, and stopping the rotation of the screw mandrel; (d) withdrawing the screw mandrel, while the lower surface of the nosepiece is abutting the end surface of the leading end of the metal collar, with sufficient force so that the lower surface of the nosepiece pushes downward on the end surface of the leading end of the metal collar to form an enlarged portion in the leading end of the metal collar, thereby securing the resin component between the enlarged portion and the flange; and (e) rotating the screw mandrel in the reverse direction to disengage the female threading of the jig from the male threading of the screw mandrel.