耐火具及び閉塞部材

Japanese Patent JP7320576

B2

To provide fire resistant grooves for more surely closing a penetration part of a fire resistant compartment.SOLUTION: In a fire resistant structure, electric wiring/piping material is inserted into a penetration part formed by penetrating a fire compartment in an architectural structure in an axial direction, and fire resistant tool is disposed between an inner peripheral surface of the penetration part and an outer peripheral surface of the electric wiring/piping material. The fire resistant tool is made of a non-thermal expansive flame-retardant material, is fixed in the penetration part, and comprises a fire resistant tool body surrounding the outer peripheral surface of the electric wiring/piping material with a prescribed interval, and a thermal expansive closing member inserted with the electric wiring/piping material, thereby, compressed and deformed so as to close a gap between the fire resistant tool and the electric wiring/piping material. The closing member comprises a plurality of groove parts that divide an inner peripheral part of the closing member facing the outer peripheral surface of the electric wiring/piping material into a plurality of divided pieces in a circumferential direction, and the plurality of divided pieces are mutually independently compressed and deformed in a circumferential direction so as to contact closely with the outer peripheral surface of the electric wiring/piping material.SELECTED DRAWING: Figure 2

Takeyo Furuta
Nobukazu Sugihara

JP2021163836A

August 03, 2023

October 05, 2021

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Mirai Industry Co., Ltd.

A62C3/16; E04B1/94; F16L5/02; F16L5/04; H02G3/22

JP2016112345A
JP2009197479A
JP2011021618A
JP2014007892A

Patent Attorney Corporation Hiroe Associates Patent Office

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