A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
THERMALLY-EXPANSIBLE BUSHING
PROBLEM TO BE SOLVED: To provide a bushing for a steel conduit pipe, which is excellent in fire resistance capable of simply and further reliably preventing fire spread caused by a flame in a penetration part of a division body.SOLUTION: A bushing for a sleeve, which is attached to a through-hole of a penetration part provided on a concrete wall serving as a fire-preventive division body, includes a thermally-expansible material. When a cable is pulled into the sleeve, it can be put into an insulated state. In addition, intrusion of a flame into a space between the bushing and the cable can be prevented in case of fire.SELECTED DRAWING: Figure 1
【課題】区画体の貫通部における火炎による延焼を、簡便かつ、より確実に防止することのできる耐火性に優れた、鋼製電線管用のブッシングを提供する。【解決手段】防火区画体であるコンクリート壁に設けられた貫通部の貫通孔に装着されるスリーブ用のブッシングは、熱膨張性材料を含む。ケーブルをスリーブ内に引き込むときに絶縁できるだけでなく、火災時にブッシングとケーブルの間の空間への火炎の侵入を防ぐこともできる。【選択図】図１
THERMALLY-EXPANSIBLE BUSHING
PROBLEM TO BE SOLVED: To provide a bushing for a steel conduit pipe, which is excellent in fire resistance capable of simply and further reliably preventing fire spread caused by a flame in a penetration part of a division body.SOLUTION: A bushing for a sleeve, which is attached to a through-hole of a penetration part provided on a concrete wall serving as a fire-preventive division body, includes a thermally-expansible material. When a cable is pulled into the sleeve, it can be put into an insulated state. In addition, intrusion of a flame into a space between the bushing and the cable can be prevented in case of fire.SELECTED DRAWING: Figure 1
【課題】区画体の貫通部における火炎による延焼を、簡便かつ、より確実に防止することのできる耐火性に優れた、鋼製電線管用のブッシングを提供する。【解決手段】防火区画体であるコンクリート壁に設けられた貫通部の貫通孔に装着されるスリーブ用のブッシングは、熱膨張性材料を含む。ケーブルをスリーブ内に引き込むときに絶縁できるだけでなく、火災時にブッシングとケーブルの間の空間への火炎の侵入を防ぐこともできる。【選択図】図１
THERMALLY-EXPANSIBLE BUSHING
熱膨張性ブッシング
NAKAJIMA HIDEYASU (author) / MAKITA YASUKAZU (author)
2016-09-29
Patent
Electronic Resource
Japanese
IPC:
E04B
Allgemeine Baukonstruktionen
,
GENERAL BUILDING CONSTRUCTIONS
/
H02G
INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
,
Verlegen oder Installieren elektrischer Kabel oder Leitungen, Verlegen oder Installieren kombinierter optischer und elektrischer Kabel oder Leitungen
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