To provide a crime prevention device of an entrance door, which can exert a crime prevention function in the opening/closing of the entrance door.
This crime prevention device of the entrance door includes: an input reception portion 1 which comprises wire-like members W1-W4 having one end provided in the entrance door 22 and having the other end provided in a door frame 21 for openably/closably supporting the entrance door, and a breaking-of-wire detection portion 2 for detecting the breaking of the wire-like member, and which receives a signal indicating the breaking of the wire-like member; an operation determination portion 4 which determines the presence or absence of a peripheral abnormal state in the opening/closing of the entrance door on the basis of the signal indicating the breaking of the wire-like member, and which determines whether or not a predetermined operation is performed depending on the presence or absence of the abnormal state; and an operation starting portion 9 which is at least partially provided in the entrance door, and which starts one or more crime prevention operations depending on the result of determination.
ITO MASAHITO
CHIISAGATA TAKESHI
NAGATA YOICHIRO
MORI TOKUJI
| JP2001198332A | 2001-07-24 | |||
| JP3146160U | 2008-11-06 |
Yutaka Nagata