Fastening resin structure and method for manufacturing the same

Abstract

A fastening resin structure includes a fiber reinforced resin member and a first collar joined to the fiber reinforced resin member. The first collar is configured to be fastened to another structure by means of a bolt and a nut. The fastening resin structure further includes a first metal foam portion made of metal foam and formed on upper and lower collar portions. The first metal foam portion is impregnated with resin to join the first metal foam portion to the fiber reinforced resin member.

What is claimed is: 
     
         1 . A fastening resin structure including a resin member and a to-be-fastened part of metal joined to the resin member, the to-be-fastened part being capable of being fastened to another structure through a fastener, the fastening resin structure comprising:
 a foam portion made from a foamable material, the foam portion being formed in the to-be-fastened part and joined to the resin member,   wherein the foam portion is impregnated with a resin to join the foam portion to the resin member.   
     
     
         2 . A method for manufacturing a fastening resin structure including a resin member and a to-be-fastened part of metal joined to the resin member, the to-be-fastened part being capable of being fastened to another structure through a fastener, the method comprising the steps of:
 forming, in the to-be-fastened part, a foam portion made of a foamable material;   placing, in a mold, the to-be-fastened part having the foam portion formed therein; and   injecting a resin into a cavity of the mold to impregnate the foam portion with the resin to join the foam portion to the resin member.