| 摘要 |
PROBLEM TO BE SOLVED: To provide an automobile disc wheel having a disc part for sufficiently reinforcing a rim part and capable of freely creating design of a disc surface. SOLUTION: This automobile disc wheel is divided into two parts in the shaft direction by a drop part of a rim, and is formed by joining an obverse side wheel part 2 and a reverse side wheel part 1 by joining parts by forming the joining parts 4, 5 in the drop part 3. This invention is the automobile disc wheel by joining the joining part 4 and the joining part 5 by rivet joining 6 or laser welding. This invention is the automobile disc wheel by welding (8) the inside of the joining parts, and is also the automobile disc wheel by applying air leakage preventive seal processing 9 to the outside (the tire installing side) of a contact plane.
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