Anti-runaway apparatus and method for a power-and-free...

Details Anti-runaway apparatus and method for a power-and-free... Anti-runaway apparatus and method for a power-and-free...

B - Operations, Transporting

61

B

B61B 10/02 (2006.01) B61K 7/08 (2006.01)

Patent

CA 2184127

In a power-and-free conveyor system that includes a free conveyor track, at least one trolley carried for free motion along said free conveyor track, said trolley including a trolley body and rollers on said body for supporting and guiding engagement with said track, and a power conveyor spaced vertically from said free conveyor track and selectively engageable with trolleys on said free conveyor track for propelling said trolleys along said track, apparatus for preventing runaway of trolleys comprising: a bar extending lengthwise of said track and means mounting said bar on a side of said track remote from said power conveyor for motion lengthwise of said track at an acute angle to the direction of travel of said trolley on said track, means for releasably biasing said bar laterally outwardly of said track and in a direction lengthwise of said track opposed to the direction of said trolley travel on said track, and means responsive to velocity of travel of said trolley on said track for moving said bar in the direction of travel of said trolley and at said acute angle laterally into a position for frictional engagement with said trolley body on said track, such that momentum of said trolley cooperates with frictional engagement of said bar with said trolley body to wedge said bar against said trolley and arrest motion of said trolley on said track.

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