PURPOSE: To eliminate a need for an induction ring and to perform smooth slide running of a trolley truck by forming a centering groove partitioned with a surface to be slid, in each of a plurality of trolley conductors over which each current collecting brush is slid, in a duct K along which a trolley truck is run.
CONSTITUTION: A duct 10 made of a metal is provided at a lower part with a lipform flange 11, by which a limited opening is set, and a plurality of trolley conductors 20 supported in an insulating state in one lot to an insulating support body 30 positioned facing the flange are disposed in a paralleling state on the under side of an upper wall. In this case, each trolley conductor 20 is folded at a line (x), by which a plate of copper is divided into two sections in the direction of width, to form a surface 21 to be slide formed approximately in a dogleg-shape. A centering groove 22 is formed in a way to be partitioned with slopes situated facing each other. A plurality of current collecting brushes, not shown, are caused to enter the centering groove 22 of each trolley conductor 20 and brought into resilient contact with the surface 21 to be slide. This constitution provides centering operation on the current collecting brush and suppresses swing in the direction of width of the trolley truck.
SUZUKI AKIMITSU
KIKUCHI MASATOSHI
TAMURA AKIO
