Apparatus for centralized mechanical and systems control in a material

Abstract

A material handling and transport system for transporting goods between a number of discharge/induction stations and selectively receiving and discharging goods at the stations. A moving transport unit, for example a train-type string or cars or trolleys with tilting trays for receiving, transporting and discharging goods between induction and discharge stations positioned along a track, incorporates a number of self-contained, locally controlled sensing, signal and actuation devices which allow the trolleys to selectively interact with passive stations around the track. The centralization of systems control on the trolleys themselves, as opposed to on the track-side stations, results in greater system flexibility, reduced cost, and allows the train to operate in essentially autonomous mode without the need for external control and monitoring. In one embodiment each tray-supporting trolley includes a self-actuating tipper arm mechanism activated by local computer to engage discharge station as the trolley passes to discharge the load carried by the trolley. Each trolley also includes a sender/receiver device capable of reading passive status indicators associated with stations around the track, and signaling various switching devices to activate track-side structure for interaction with the trolley as it passes.