Title:
FIRE DOOR LOCKING AND UNLOCKING DEVICE
Document Type and Number:
Japanese Patent JP2018135756
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a fire door locking and unlocking device capable of reducing the labor required for operation test and improving safety during the operation test.SOLUTION: A fire door locking and unlocking device 1 comprises a locking mechanism capable of being displaced to either a locked state or a released state, the locking mechanism locking a fire door 2 by locking the hook shaft in the locked state and releasing the fire door 2 by releasing the hook shaft in the released state, a solenoid mechanism for displacing the locking mechanism from the locked state to the released state by receiving an unlock request signal requesting unlocking of the fire door 2 and operating, a first indicator lamp, a second indicator lamp, and a third indicator lamp for outputting an operation status of the function of the fire door locking and unlocking device 1, and an adjusting spring mechanism for displacing the locking mechanism from the released state to the locked state, in which the adjusting spring mechanism has an operating portion spring for returning to the state before the operation of the adjusting spring mechanism after operating the adjusting spring mechanism.SELECTED DRAWING: Figure 1
Inventors:
NIEDA YASUHIRO
Application Number:
JP2018100125A
Publication Date:
August 30, 2018
Filing Date:
May 25, 2018
Export Citation:
Assignee:
HOCHIKI CO
International Classes:
E05B65/10; A62C2/06; E05B41/00; E05B47/06
Domestic Patent References:
| JPH0716306A | 1995-01-20 | |||
| JPS5930253U | 1984-02-24 |
Attorney, Agent or Firm:
Tatsuya Saito