| 摘要 |
A vehicle door frame, which forms the window frame of a vehicle door, includes an outer member and an elongated inner member. The outer member forms a glass-run housing portion. The inner member includes a body portion for forming the framework of the window frame and is coupled to the outer member. The outer member includes an edge portion, which forms a part of the glass-run housing portion, and a folded portion, which includes a substantially U-shaped cross section. The folded portion is provided at the edge portion, and includes an opening, which opens in an inward direction of the vehicle. The inner member includes an extended portion, which extends in an outward direction of the vehicle from the body portion, and an edge portion, which is provided at the extended portion. The edge portion of the extended portion is inserted into the opening of the folded portion. The edge portion of the extended portion includes a distal end surface. A protrusion is formed on the distal end surface. The protrusion protrudes in the outward direction of the vehicle and is located at a predetermined position of the inner member in the longitudinal direction. The folded portion has a facing portion that faces the distal end surface. The protrusion can be melted by heating by the concentration of electric current during resistance welding and is configured to pressurize and join the distal end surface and the facing portion of the folded portion to each other. The protrusion includes a tip end, which has an arcuate cross section protruding in the outward direction of the vehicle. |
