| 摘要 |
A cross-shaped chassis frame (1) formed by abutting and connecting the end parts of side members (12) to the outer face of a front end cross member (11), wherein the side members (12) are formed of hollow pipes, the end parts of the side members (12) are gradually expanded to form joined parts (20) expanded in flare skirt shape, and the outer edges of the joined parts (20) are allowed to abut on and welded to the outer face of the front end cross member (11), whereby the side members (12) can be jointed to the outer face of the front end cross member (11).
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