| 摘要 |
PURPOSE:To improve durability of an under body, by mounting a sub frame through an elastic member to an under body of synthetic resin, thereby increasing rigidity of the under body to disperse stress acting on the under body. CONSTITUTION:An under body 10 of synthetic resin is formed to a complicated uneven shape by a channel portion of sectional U-shape longitudinally extending at a center thereof, and a seat receiving portion with a shoulder laterally extending near the center. There is formed a reinforcing portion of sectional U- shape opening below at an outer circumferential edge. Thus, the under body 10 is formed with a complicated unevenness, so as to aim at increase in its rigidity. A sub frame 74 is in contact with a lower surface of a rear portion of the under body 10 in a relatively wide area through a buffer plate 78 as an elastic member, and is mounted to the under body 10 by combination of a rubber bushing and a pin at four points. |
