Potential human errors taken into consideration to design the power circuit shutdown mechanism.
Securely prevents accidents involving hand winding wheels.

Ensure safety of the surroundings of elevator hoisting machine

Elevator cars are usually lifted up/down automatically by the hoisting machine installed on the top of the hoistway. Although emergent situation such as hoisting machine failure rarely occurs, the hoisting machine is designed so that a hand winding wheel can be attached in case a worker needs to operate the hoisting machine manually.

To do so, the worker removes the protection cover on the wheel attachment part of the hoisting machine and installs the wheel. A safety device is required in this procedure to protect the worker from unexpected wheel movement that can result in injuries

IDEC interlock switch secures power circuit shutdown