Patent ID: 7114304

Claim:
A member adapted to be used in a friction stir welding, comprising: a member which is an extruded frame member and has a recessed portion along an end portion of said member, said recessed portion opening directed toward an outer side in a thickness direction of said extruded frame member and toward one end direction of said extruded frame member, and having a side face and a bottom face, a raised portion projecting to the outer side in the thickness direction, from the outer side of said extruded frame member, and said raised portion is a portion adapted to have the friction stir welding carried out therein by inserting a rotary tool therein, said extruded frame member being adapted to have another extruded frame member mounted on said bottom face of said recessed portion of said extruded frame member and to have said another extruded frame member abutted thereto, with a gap formed between said side face of said extruded frame member and an end portion of said another extruded frame member, and wherein said friction stir welding is carried out by inserting said rotary tool in the another extruded frame member in addition to into said raised portion.