| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a termite prevention structure and an underfloor structure which can prevent termite entry in a higher degree. <P>SOLUTION: A termite prevention structure 4 according to the present invention comprises: a pipe 1 having an opening; a lid member 2 for closing the opening; and a termite prevention O-ring 3 containing a termite prevention agent which is inserted between an edge part of the pipe 1 and the lid member 2 to close a gap between the opening of the pipe 1 and the lid member 2. The lid member 2 is made up of a lid body 2b which covers whole cross-section of the pipe 1, and an insertion part 2a which is formed integrally with the lid body 2b and abuts on an inner peripheral surface 1n of the pipe 1. The termite prevention O-ring 3 preferably contains 1-5 wt.% of boric acid or a boric acid derivative as the termite prevention agent. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
