Abstract: A mounting structure or holding frame movable along a conveyor system has a locking device which includes a seat with a recess to accommodate a connection component of a workpiece, and a latch pivotable to open or close the recess and bearing a start roller. A securing rail adapted to block the latch in its open or closed position is movable in parallel to the pivotal plane of the latch an bears a start roller. Both start rollers are controlled by cams disposed along the conveying path of the mounting structure.

Abstract: A coupling and braking device for rail supported tow cars driven by means of an underfloor chain, each car having a movable, spring loaded front fender which, upon engagement against a protruding latching device of a stop barrier or of a standing preceding car, executes an energy absorbing motion with a motion component oriented at an angle to the travel direction, making it possible to block the release of the stored energy by means of the latching device. The latter is operatively connected to the movable front fender, moving rearwardly into a protruding activated position, when the fender is deflected.