Crime prevention structure of steel door

Abstract

A steel door capable of sufficiently resisting even the invasion of a forcible and brutal burglar though its structure is simple and providing a high added value for crime prevention without impairing aesthetic appearances such as shape and design. The steel door (1) comprises an indoor panel (7) and an outdoor panel (6). A sound isolation core material (B) is filled in a space part (A) formed between the inner surfaces of these panels (6) and (7), and a highly hard metal plate (15) thicker in plate thickness than at least one panel among the panels (6) and (7) is tensely installed between the entire inner surface of the panel excluding the mounting part of door structural members and the sound isolation core material (B).

Description

technical field [0001] The present invention relates to a steel door used as a swing door installed in an entrance of an apartment house, a high-rise building, etc., and specifically relates to a security structure of the steel door. Background technique [0002] Conventionally, it is known to use a plurality of locking mechanisms provided on the handle portion of the door and additionally provided locking mechanisms on a steel door composed of an indoor side panel and an outdoor side panel having a desired depth and width. Institutions have anti-crime functions. Most of the "break-in robbers" who have been increasing in recent years break in through entrances and exits such as the main entrance made of steel doors. As a method of intrusion, in addition to inserting a special tool for a substitute key into the keyhole to open the lock, there is also the "door breaking" method. In addition, there are "inserting a tool into the keyhole to unlock the lock (カム送り解链)" and "bypass...

AI Technical Summary

Problems solved by technology

In order to counteract this criminal method, if the thickness of the interior side panel and exterior side panel is made thick, there will be adverse problems such as reduction of press workability in the manufacturing process or restriction of appearance such as shape and design. Therefore, People are looking forward to the emergence of steel doors with higher security functions while ensuring the production efficiency of steel doors

[0004] In addition, for a swing door in which the door is attached to the opening with a shaft hanging metal fitting, since the shaft hanging metal fitting is exposed on the upper and lower sides of the door, there is a possibility of damage.

When the shaft suspension metal parts are destroyed, the door can be removed from the opening, so there is a problem that the security is poor even if the door is locked.

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