Title:
GUARDING DEVICE
Document Type and Number:
Japanese Patent JP3271917
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To detect the opening/closing state of a door and an abnormal state that the door is forced open without the need of installing a sensor in a door movable part.
SOLUTION: A pressure sensitive sensor 1 detecting a detection signal corresponding to a pressure value added by the door is fitted to a frame to which the door is fitted. A controller 2 previously stores a judgment value for judging that the door is opened, the detection signal from the pressure sensitive sensor 1 is compared with the judged value and the opening/closing of the door is judged. When the door is judged to be opened, door opening warning is transmitted to a monitor device 3. When the monitor device 3 receives door opening warning from the controller 2, it gives the warning of the reception of the signal by characters or sound.
Inventors:
Michiko Sugawara
Hidekazu Ino
Hidekazu Ino
Application Number:
JP1070697A
Publication Date:
April 08, 2002
Filing Date:
January 23, 1997
Export Citation:
Assignee:
Sogo Security Co., Ltd.
International Classes:
G08B13/08; G08B15/00; G08B23/00; G08B25/08; H04M11/04; (IPC1-7): G08B13/08; G08B15/00; G08B23/00; G08B25/08; H04M11/04
Domestic Patent References:
| JP6159597A |
Attorney, Agent or Firm:
Tadahiko Ito