초록 ▼

A method for assembling a metal collar to a resin component includes: inserting the metal collar into a mounting hole of the resin component, and setting them so that a flange of the collar abuts a jig;inserting a screw mandrel of a fastening tool into a through-hole in the collar, and rotating the

A method for assembling a metal collar to a resin component includes: inserting the metal collar into a mounting hole of the resin component, and setting them so that a flange of the collar abuts a jig;inserting a screw mandrel of a fastening tool into a through-hole in the collar, and rotating the mandrel so that the male threading of the mandrel engages the female threading of the jig;abutting a nosepiece of the fastening tool against the collar, and stopping the rotation of the mandrel;withdrawing the mandrel so that the nosepiece presses against one end of the collar with sufficient force to enlarge the outer diameter of that end of the collar to form an enlarged portion, thereby securing the resin component between the enlarged portion and the flange; and(e) rotating the mandrel in the reverse direction to disengage the respective threading.

대표청구항 ▼

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 s

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. 2. The method claimed in claim 1, wherein, in the step of withdrawing the screw mandrel, a portion adjacent the end surface of the leading end of the metal collar is buckled to form the enlarged portion. 3. The method claimed in claim 1, wherein, in the step of withdrawing the screw mandrel, the diameter of the end surface of the leading end of the metal collar is flared out to form the enlarged portion. 4. The method claimed in claim 1, wherein a tiered portion is formed in the through-hole of the metal collar, the side of the tiered portion opposite that of the flange is a thin portion, and, in the step of withdrawing the screw mandrel, the thin portion is enlarged to form the enlarged portion. 5. The method claimed in claim 1, wherein the resin component has a recess for accommodating the flange of the metal collar, and a counter bore for accommodating the enlarged portion of the metal collar. 6. The method claimed in claim 1, wherein the cross-sections of the outer surface of the sleeve and the inner surface of the through-hole in the metal collar are circular, and the cross-section of the inner surface of the mounting hole in the resin component is circular. 7. The method claimed in claim 1, wherein the cross-sections of the outer surface of the sleeve and the inner surface of the through-hole in the metal collar are oval-shaped, and the cross-section of the inner surface of the mounting hole in the resin component is oval-shaped. 8. The method claimed in claim 1, wherein the step of withdrawing the screw mandrel is accomplished without rotating the screw mandrel.