Title:
CRIME PREVENTION SYSTEM FOR DOOR AND CRIME PREVENTION DOOR
Document Type and Number:
Japanese Patent JP2004206675
Kind Code:
A
Abstract:
To provide a crime prevention system for a door and a crime prevention door capable of easily and surely detecting breakage of the door by thumb-turn turning, etc. and consequently preventing invasion of a sneak thief and a burglar, etc. from an entrance, etc.
In the door 1, a space part 16 is provided in its inside and the space part 16 is made to be in a vacuum state. When a hole for the thumb-turn turning is opened in the door 1 by the sneak thief and the burglar, etc, the vacuum state of the space part 16 is broken down and gas pressure changes. A pressure detection device 2 detects a change in pressure in the space part and an alarm output device 3 outputs an alarm in accordance with its detection.
Inventors:
ETO TOSHIAKI
Application Number:
JP2003182955A
Publication Date:
July 22, 2004
Filing Date:
June 26, 2003
Export Citation:
Assignee:
ETO TOSHIAKI
International Classes:
E05B45/06; G08B13/08; G08B13/20; G08B13/22; G08B25/08; (IPC1-7): G08B13/20; E05B45/06; G08B13/08; G08B13/22; G08B25/08
Attorney, Agent or Firm:
Masaki Kobayashi