Title:
AUTOMATIC CLOSING DEVICE
Document Type and Number:
Japanese Patent JP2001329768
Kind Code:
A
Abstract:
To dispense with electric power and a special holding member in holding a brake in a released state during the own-weight descent of a shutter curtain in an automatic closing device for releasing the brake on the basis of a signal from fire alarm equipment to allow the shutter curtain to descend of its own weight.
This automatic closing device 15 is provided with a short circuit C for short-circuiting a DC geared motor 17 to make dynamic braking on the basis of detecting a brake in the released state.
Inventors:
UENO KOHEI
KOSHII NORIHIRO
KOSHII NORIHIRO
Application Number:
JP2000153202A
Publication Date:
November 30, 2001
Filing Date:
May 24, 2000
Export Citation:
Assignee:
SANWA SHUTTER CORP
International Classes:
E06B9/80; A62C2/06; E06B9/82; (IPC1-7): E06B9/80; A62C2/06
Attorney, Agent or Firm:
Tetsuo Hirose