| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a penetration hole closing structure of a hollow structure capable of closing a penetration hole efficiently with a small amount of a foam agent without increase of cost and weight, and deterioration of productivity, and capable of draining water when water entered inside.SOLUTION: A seal member 9 is fitted to a penetration hole 3c when the penetration hole 3c formed on a part which is not accessible from outside of a rocker member (hollow structure) is closed by a foam agent. The seal member 9 comprises: an annular body 13 having a recess groove 10c for fitting the seal member 9 to an inner peripheral edge of the penetration hole 3c; and a foam agent 14 stored in the annular body 13. The foam agent 14 is foamed so as to close the penetration hole 3c from inside of the annular body 13 in a temperature-rising process.</p> |
