Gantry used for transporting person or material to tower of wind energy plant, interrupts power supply of electric drive unit based on detected movement of protection plate

摘要

The gantry (1) has a protection plate (2) that is longitudinally fixed to the bottom portion of cabin floor through the bolts (6). A movable ladder, which is arranged parallel to the protection plate, is moved along the guide rollers (4). A contact switch (13) detects the horizontal and vertical movement of protection plate in the gantry main portion. The power supply of electric drive unit is interrupted based on the detected movement of protection plate.