| 摘要 |
PROBLEM TO BE SOLVED: To provide a track system traffic vehicle attaining weight reduction of an upper structure and enhancement of strength. SOLUTION: In the track system traffic vehicle in which the upper structure 4 is mounted onto the base frame 2, at least ceiling part 4a and a window lower side plate part 4b of the upper structure 4 are formed by a sandwich material in which a core material 3 is integrally clamped by skins 11, 12 made of fiber-reinforced plastic, and a reinforcement frame 10 is incorporated into at least a periphery of an opening part 7 for a door. COPYRIGHT: (C)2011,JPO&INPIT
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