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Title:
DOOR UNLOCKING DEVICE
Document Type and Number:
Japanese Patent JP2011157763
Kind Code:
A
Abstract:

To provide a door unlocking device which enables a door to be easily opened without causing intermeshing, even when a room interior is brought into a high pressure state by a jet of fire extinguishing gas and the like.

A latch mechanism (unlocking device) 27 includes a strike 40 which is provided on one of the opposed surfaces 21a and 22a, joined to each other, of the pair of doors 21 and 22, and a latch 35 which is provided on the other one and which can protrude from/recede into the strike 40. The latch mechanism (unlocking device) 27 is also provided with a roller 50 which abuts on the latch 35 making an entry into the strike 40 and which can be rotated in the protruding/receding direction of the latch 35.


Inventors:
Ishikawa, Chikara
Sakai, Kenji
Kojima, Toshio
Kondo, Jun
Unno, Tsutomu
Fukao, Hitoshi
Application Number:
JP2010000021481
Publication Date:
August 18, 2011
Filing Date:
February 02, 2010
Export Citation:
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Assignee:
NTT FACILITIES INC
International Classes:
E05B15/02; A62C2/06; E05B65/06



 
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