BLOCKING MEMBER OF FOAMING SUBSTANCE

PROBLEM TO BE SOLVED: To provide a blocking member made of a foaming substance capable of simply inserting a foaming composition agent into a cylindrical member without dropping the strength of a vehicle structure and of preventing the foaming composition agent from slipping off until it makes foaming. SOLUTION: The blocking member 6 made of foaming substance which is inserted into a pipe P having multi-angular section included in the vehicle structure 5 for blocking the inside of the pipe P, is equipped with the forming composition agent 61 to make foaming with heating, a ring 621 attached to the composition agent 61, and a plurality of spring leaves 622 coupled with the ring 621 and retaining the composition agent 61 in the inside of the pipe P with the aid of friction with the inside surface of the pipe P. COPYRIGHT: (C)2008,JPO&INPIT