MOVABLE BRIDGE STRUCTURE FOR FERRY SERVICE

PROBLEM TO BE SOLVED: To save energy and improve safety by automatically controlling a main bridge angle or the like of a ferry. SOLUTION: A movable bridge device of a ferry 2 is provided with a main bridge 1, a lifting device 3, a subbridge 4, inclinometers, 5, 6, a controller 7, an axle load meter 8 for preliminarily estimating and controlling a condition when a heavy vehicle passes through, an ultrasonic position sensor 9 for setting the main bridge and the subbridge when a ferry gets to the shore, a proximity switch 10, etc., to detect and control the angle of the connection parts of both ends of a ramp way, and control the rising and falling movement of the main bridge 1 by the controller 7 so to obtain these appropriate angles. In this way, a ferry boat can automatically come alongside the pier and automatic embarkation/disembarkation can be realized and hence, energy can be saved and bumping accidents of flanks of vehicles can be securely prevented.