ACTUATION MECHANISM FOR A TARPING SYSTEM

摘要

An open-topped vehicle body (13), includes a tarping system (16) that is deployed over the body by a pivoting bail member (22). An actuation mechanism (25) applies a torque to the bail member to automatically pivot the member and deploy the tarp. The actuation mechanism includes a number of double coil spiral torsion springs (50) anchored on a shaft (67) attached to the truck body. The springs each include a right hand (54) and a left hand (52) coil portion concentrically wound about an integral center anchor portion. The shaft includes an elongated slot (69) to receive and support the centre anchor portion of each spring within the mechanism. The housing contains the double coil springs and supports a pair of reaction posts (92) extending therethrough to which the reaction ends of the double coil springs can transfer their torsional force.