Arrangement for transferring carriers at power line discontinuous portion of power-and-free trolley conveyor

摘要

At a power line discontinuous portion of a power-and-free trolley conveyor, a carrier is transferred from a carrier entering first power line to a second power line by being pushed by a following pusher dog from behind. The following pusher dog is restrained from disengaging from the rear free trolley by at least one endless free chain positioned immediately above and parallel to the path of the pusher dog. A pair of endless free chains can be used with the chains being reeved around sprockets to be free movable along with the engaged pusher dog, thereby avoiding wear on the pusher dog side projections. The loop of the chains extend for a distance sufficient for the front free trolley of the carrier to cross the powerline discontinuous portion of the conveyor.