| 摘要 |
<p>PURPOSE:To surely fix piping, and also, to attempt a complete fire prevention, in a through-hole of a fireproof block wall. CONSTITUTION:The upper frame and the lower frame are constituted of a frame body 1 of the same structure, a thermal expandable refractory material in which a semicircular recessed part 8 being freely changeable is formed is integrated into this frame body 1, piping is allowed to pass through the inside of the recessed part 8, the frame body of the upper side and the frame body of the lower side are connected integrally by an operation of an elastic hook piece 9 and a stopper piece 12, and elastic engaging pieces 11, 11a and engaging recessed parts 14, 14a, it is set into a through-hole, and the periphery of the frame body 1 is back-filled again with mortar, by which the construction is finished.</p> |
