Title:
PREVENTING DEVICE FOR UNLOCKING BY KEY
Document Type and Number:
Japanese Patent JP3169481
Kind Code:
B2
Abstract:
PURPOSE: To prevent that an unlawful person opens a door by closing the key hole of a door lock, and check the rotation of a door handle.
CONSTITUTION: A handle attaching plate 2 having a door lock 4 and a handle 3 is fixed at a fixed position on the surface of a door 1. A main body 6 is unitedly attached so as to cover the whole outer surface of the handle attaching plate 2 and along the U-shaped groove of an unlocking preventing cover plate 5 provided with the U-shaped groove through which the shaft part 3s of the door handle 3 is inserted. A hinge part is formed on the side of an one end of the main body 6, and a lock body inserting hole 64 is formed on the side of the other end of the main body 6, and a pressing plate 7 is attached to the main body 6 through a hinge. In addition, a lock body 8 for engaging and disengaging with the main body 6 is attached to the pressing plate 7 to cooperate with the U-shaped groove of the main body 6. Thus, since the key hole of the door lock 4 is completely covered by the cover plate 5, a key can not be used, and moreover the rotation of the door handle 3 can be checked by the main body 6 and the pressing plate 7 for preventing unlawful unlocking and tenanting.
Inventors:
Saburo Minami
Application Number:
JP15160793A
Publication Date:
May 28, 2001
Filing Date:
May 28, 1993
Export Citation:
Assignee:
Osaka Metal Co., Ltd.
International Classes:
E05B17/14; E05B13/00; (IPC1-7): E05B13/00
Domestic Patent References:
| JP5555779A | ||||
| JP58191875A | ||||
| JP328278U | ||||
| JP482267U |
Attorney, Agent or Firm:
Kiyoaki Hayashi (1 person outside)