| 摘要 |
PROBLEM TO BE SOLVED: To improve airtighness by suppressing enlarging and opening of each member at the junction part, in a resin hollow body made by joining a plurality of members. SOLUTION: An intake manifold 11 is constituted of an upper part dividing body 12 and a lower part dividing body 13 which are divided in the up and down directions. Each dividing body 12 and 13 is made of polyamide resin and has flanges 22 and 23 at the peripheral edges of both the sides. By joining each flange 22 and 23 each other by vibration welding, each dividing body 12 and 13 is integrated. On the outer periphery of each dividing body 12 and 13, a horizontal rib 30a extending to each flange 22 and 23 is formed. |
