Automatic load transfer device and method for automated material handling systems

An automatic load transfer device is provided for automated material handling systems of the type having a tow AGV pulling a train of trailers along a predetermined path between stations. The device has a base positioned adjacent to the path with spaced apart rails that support a movable carriage which shifts between retracted and extended positions. A conveyor having a plurality of side-by-side fingers with moving conveyor elements is supported on the carriage by a lift which shifts the conveyor between lowered and raised positions. The carriage, conveyor elements, and lift have separate drives that are operably connected with a controller which sequentially activates the same to load and/or unload loads onto and/or from the trailers.