PURPOSE: To provide a size reduced and safe elevator in which braking force is stabilized from high speed driving through low speed driving.
CONSTITUTION: A brake 9a is provided not only on a sheave but also on a deflector wheel 4a in an elevator, and pressure for pressing a shoe against a drum or a disc of the brake 9a or separating force is generated by using a spring and a fluid pressure cylinder. Besides, the most suitable braking force to inertia mass and speed of an elevator car and so forth where braking is to be applied is obtained, the force which controls fluid pressure 61 and presses the shoe against the drum or the disc is controlled to always generate the most suitable braking force on the brake. Moreover, a controller 60 which controls the pressure of a fluid pressure cylinder is operated by an emergency power supply. Therefore, it is possible to certainly keep the position of the elevator car during a usual operation, and realize little braking shock and the smallest braking distance by generating the most suitable braking force according to the load and speed of the elevator car at the time of emergency.
| JP4701946 | Elevator brake device |
| JPH11139701 | ELEVATOR CONTROL DEVICE |
| JP2012512116 | Elevator brake control |
OGASAWARA TAKESHI
SHIGETA MASAYUKI
TANAKA MASAKATSU
