| 摘要 |
PROBLEM TO BE SOLVED: To improve productivity by easily casting a wheel by a metallic mold on one side surface side of the wheel and a metallic mold on the other side surface side without using a core like a conventional way. SOLUTION: A hub part 65 is constituted of an inner hub 81 arranged on an axle 50 side, an outer hub 82 connected to a spoke part 66 arranged on an outer peripheral side of the inner hub 81, and side walls 71 and 75 for integrally connecting the inner hub 81 and the outer hub 82. First recessed part 73 and second recessed part 77 recessed in a shaft direction between the inner hub 81 and the outer hub 82 and having first openings 78 and 79 and first bottom walls 73A and 77A formed on opposite sides to each other are arranged alternately in a circumferential direction. COPYRIGHT: (C)2004,JPO
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