Power and Free Overhead
The power and free conveyor is realized with two rails connected with welded rail plates at variable distance, following the type of load to be transported. The rail is constructed with double moulded plate profil mounted in order to have a guide for the running of chain on the superior part and a guide for the running of the trolleys hanging the pieces in the inferior part.
In the monorail installations the moving of the pieces is consequent to the layout of the rail and speed of the chain, in those power and free the pieces hanged to the trolleys are free from the layout and speed chain. For this fact it is possible to foresee stop zones, to stock pieces, to change direction respect to the chain and and to insert the trolleys to other lines pulled with other chains and obtain more complex layouts.
Particular exchange devices for direction, for stop, for lift give the possibility to program the work and make the installation suitable for various type of works cycles.
The chain used are the same as in the monorail conveyors.