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Title:
DOOR CLOSING DEVICE
Document Type and Number:
Japanese Patent JP2009052290
Kind Code:
A
Abstract:

To provide a door closing device usable in place of a lock to prevent the intrusion of a suspicious person.

The door closing device for maintaining a vestibule door 20 mounted in an openable/closable manner to an opening of a vestibule frame 30 comprises a suction cup 11 provided on the vestibule frame 30 side to form a space between the edge part of the opening and the vestibule door 20 into a closed space 11d when the vestibule door 20 is in the closed position, and a hose 12 and a suction pump 14 for sucking air in the closed space 11d. The sucker 11 is formed of an elastic member to widen from a base part toward the tip part which abuts on a suction face. The hose 12 is provided with a valve 13 preventing back flow from the suction pump 14 side.


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Inventors:
FUKUSHIMA NORIO
FUJITA HIROSHI
Application Number:
JP2007220061A
Publication Date:
March 12, 2009
Filing Date:
August 27, 2007
Export Citation:
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Assignee:
NISSHO KOGYO KK
International Classes:
E05B51/02
Domestic Patent References:
JPS63122881A1988-05-26
JP2002036055A2002-02-05
JPH07267410A1995-10-17
JPH08334540A1996-12-17
Attorney, Agent or Firm:
Hisashi Kato
Mikio Hotta