Member joining structure

Abstract

A member joining structure joins a first member and a second member. The first member includes a first face, a second face opposite to the first face, and a through hole formed so as to continue from the first face to the second face. The member joining structure includes a linking member interposed between the first member and the second member. The linking member includes a first holding portion and a second holding portion, each being plate shaped including a base edge, a tip edge opposite to the base edge, and side edges extended from ends of the base edge to ends of the tip edge. The first holding portion and the second holding portion face one another and hold the first face and the second face of the first member therebetween.

What is claimed is: 
     
         1 . A member joining structure that joins a first member and a second member, wherein the first member includes a first face, a second face opposite to the first face, and a through hole formed so as to continue from the first face to the second face, the member joining structure comprising:
 a linking member interposed between the first member and the second member,   wherein the linking member comprises:
 a first holding portion and a second holding portion, each being plate shaped including a base edge, a tip edge opposite to the base edge, and side edges extended from ends of the base edge to ends of the tip edge, wherein the first holding portion and the second holding portion face one another and hold the first face and the second face of the first member therebetween; 
 an engaging protrusion provided on at least one of the first holding portion and the second holding portion at a position away from the side edges, the engaging protrusion being inserted into the through hole and welded to an other holding portion; 
 a first supporting portion extending from the base edge of the first holding portion; 
 a second supporting portion extending from the base edge of the second holding portion; and 
 an attaching portion extending from the first supporting portion via a first fold portion, the attaching portion being attachable to the second member; and 
   a pair of side extensions extending from the attaching portion via a fold-back portion, the pair of side extensions extending following both sides of the attaching portion to the second supporting portion, the pair of side extensions continuing to the second supporting portion via a second fold portion.   
     
     
         2 . The member joining structure according to  claim 1 , wherein the side extensions are curved in an extending direction thereof. 
     
     
         3 . The member joining structure according to  claim 1 , wherein each of the first supporting portion and the second supporting portion has a stepped shape. 
     
     
         4 . The member joining structure according to  claim 1 , wherein the first holding portion includes a side slit formed following the side edge of the first holding portion. 
     
     
         5 . The member joining structure according to  claim 1 , wherein the first holding portion includes a slit formed to extend along at least one of the base edge and the tip edge. 
     
     
         6 . The member joining structure according to  claim 2 , wherein the first holding portion includes a slit formed to extend along at least one of the base edge and the tip edge. 
     
     
         7 . The member joining structure according to  claim 3 , wherein the first holding portion includes a slit formed to extend along at least either one of the base edge and the tip edge. 
     
     
         8 . The member joining structure according to  claim 4 , wherein the first holding portion includes a slit formed to extend along at least one of the base edge and the tip edge. 
     
     
         9 . The member joining structure according to  claim 1 , wherein the first holding portion and the second holding portion at tip edges thereof are separated from each other and leave a gap therebetween. 
     
     
         10 . The member joining structure according to  claim 1 , wherein tip edges of the first and second holding portions are parallel to each other. 
     
     
         11 . The member joining structure according to  claim 1 , wherein tip edges of the first and second holding portions face away from each other with a gap therebetween. 
     
     
         12 . The member joining structure according to  claim 1 , wherein a gap is formed between the tip edge of the first holding portion and a tip edge of the second holding portion such that the tip edges are non-continuous with respect to each other.