B - Operations – Transporting – 66 – C
Patent
B - Operations, Transporting
66
C
294/23, 212/25,
B66C 3/02 (2006.01) B66D 1/62 (2006.01)
Patent
CA 1064897
ABSTRACT OF THE INVENTION A hoisting device for use with a hoisting gear structure, such as a deck crane for rope-actuation of the opening and closing of a grabbing element for transporting loads where the hoisting gear structure is equipped with a load winch having a load-rope drum with at least two load ropes. One of the load ropes is a holding rope for holding and supporting the grabbing element, and the other load rope is a closing rope serving as a supporting rope and a closing rope for the grabbing element. The supporting rope when used as a closing rope is connected to a rope- tensioning arrangement through which the grabbing element can be actuated to be opened or closed. The double load ropes, when used for raising and lowering the grabbing ele- ment are synchronized by simultaneous winding and unwinding on the load-rope drum. The device is characterized in that the holding rope is rigged from the load-rope drum via one or more pulleys and via a grabber attached to the grabbing device to a fixed anchorage on the hoisting gear structure and wherein the closing rope is rigged from the load-rope drum via one or more other pulleys and a hauling arrangement in the grabbing device to the rope-tensioning arrangement to which an outer end of the closing rope is connected.
286784
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