Abstract:
A control arrangement (100) for an elevator brake, comprises a control circuit (110) adapted to generate, according to a demand for releasing a first braking member of the elevator brake, a first actuating signal and to generate, according to a demand for releasing a second braking member of the elevator brake, a second actuating signal; a first terminal (112) for outputting the first actuating signal to a first electromagnetic actuating means (26) of the elevator brake, a second terminal for outputting the second actuating signal to a second electromagnetic actuating means (30) of the elevator brake; the control arrangement (100) being adapted to allow at least the following modes of operation: A) a normal operation mode in which the first and the second actuating signals are supplied synchronously to the first and second electromagnetic actuation means (26, 30), respectively, and B) a single braking member test operation mode, in which one of the first and second actuating signals is supplied to the respective one of the first and second electromagnetic actuating means (26, 30), and an actuating signal for permanently releasing the respective of the first and second braking members (14, 16) is supplied to the other one of the first and second electromagnetic actuating means (26, 30).
Abstract:
The elevator system has a traveling vertically within a shaft, a plurality of landing doors disposed along said shaft, a drive system for driving the car, a controller for controlling the drive system, a power source, including at least one circuit breaker, for powering at least the driving system, and an emergency and inspection interface for allowing a user to control operations of the elevator. The emergency and inspection interface comprises a fixed port connected to the controller, a portable control unit having a user interface and an access port for associating with the fixed port, and a switch for remotely controlling the circuit breaker which is located within the shaft.
Abstract:
The device (1) according to the invention for the safety stop of an elevator car (3), particularly in elevators without machine room and with a small free space at the top (4) and/or bottom (6) of the shaft in normal operation, is characterized in that it includes at least one box (9, 9') mounted relative to the shaft and level with the speed limiting cable (5) of the car overspeed safety device and provided with an articulated fork element (15, 15') that has an end adapted to engage at least one attachment element (21, 23) tied to said speed limiting cable (5) of the car overspeed safety device (7) in the service position of the device to arrest the cable and thus cause a safety stop of the elevator car (3), and to be disengaged from said attachment element (21, 23) , in the inactive position, wherein said fork element (15) in the service position and the cable attachment element (21, 23) are located at an appropriate height in combination with each other in the elevator shaft for the engagement of the attachment element (21, 23) with the fork element (15) to cause the arrest of the elevator car at an adequate height in the shaft to leave at least a safety space for the operator on the cabin roof (37) or in the shaft bottom (6).
Abstract:
The elevator has a car movable vertically within a shaft between lower and upper end positions and a drive system coupled to a traction system for controlling movement of the car. A limit switch which is open when the car is in a selected distance range from one of the end positions. The limit switch forms part of a power line supplying power to the drive system for controlling movement of the car in a direction towards that end position in an inspection operation. Thus movement of the car is prevented only in that direction when the car is in the selected distance range in an inspection operation.
Abstract:
The safety device for an elevator system comprises a retractable element mounted on a support. The retractable element has a stopping position in which a catch portion of the retractable element projects from the support to engage a triggering member of a safety brake associated with an elevator car as the elevator car traveling in a selected direction approaches a selected vertical position, and a retracted position. An actuator selectively controls the position of the retractable element. A position sensor is responsive to the position of the retractable element to make sure that it is in its stopping position when needed.