| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To secure high cut-off property while easily coping with a selective request for two specifications of forward lead-out specification and downward lead-out specification. <P>SOLUTION: To constitute the hood box mounted to a forming part of a through-hole 2 for piping or wiring at an exterior wall 1a of a building 1, a hood box base body is formed of a bent cylindrical body 5A of inverted L-shape from the side view having a back face opening 5b facing the through hole 2, and a lower face opening 5c opened downward in front of the exterior wall, as both end openings. A front opening 5a for leading out piping or wiring is formed at the front face lower part of the bent cylindrical body 5a, and a forming part of the lower face opening 5c of the bent cylindrical part 5A is provided with a mounting part 28e of a lower face blocking plate 24 for blocking the lower face opening 5c. <P>COPYRIGHT: (C)2003,JPO</p> |
