Elevator generating electric energy using displacement thereof

An elevator comprising:

• a cage installed in a shaft formed in a building in order to carry a passenger or a load;
• a counterweight installed in the shaft and connected to the cage through a wire rope so as to move in the opposite direction of a moving direction of the cage;
• sub-guide rails that are vertically installed in the shaft and supports the counterweight so as to be vertically movable along the shaft;
• a drive unit vertically moving the cage along the shaft;
• a first electricity generation unit including a first coil section installed on the cage or the shaft and a first magnetic force generator that is installed on the shaft or the cage so as to face the first coil section and provides a magnetic force to the first coil section so as to generate an induced electromotive force according to relative position change between the first coil section and the first magnetic force generator while the cage moves up and down;
• and
• a second electricity generation unit including a second coil section installed on the counterweight and a second magnetic force generator installed on the shaft or the sub-guide rails to face the second coil section and provide a magnetic force to the second coil section so as to generate an induced electromotive force according to relative position change between the second coil section and the second magnetic force generator while the counterweight moves up and down.