A hoist safety lock mechanism includes a pair of pawls formed on terminal ends of each corner of a pallet support structure. The pawls are biased outward to an extended position and include a lower support surface adapted to rest on a support surface. The pawls may be pivotally deflected downward (but not upward) due to impact on a top surface of the pawl. Each pawl is configured to be received within a respective parallel column of slots formed on inwardly-facing sides of the vertical posts forming the lifting frame of the hoist. The slots within each column are vertically offset and separated by separators which can vertically deflect the pawls. Because the slots are vertically offset, and because each terminal end includes a pair of pawls, there is always at least one pawl engaged within the slot even if the other of the pair is deflected by contact with a separator. Thus, any failure of the hoist will cause the pallet support structure to only fall to the next lower separator before the pawl catches it.
Hoist safety lock mechanism
2017-05-23
Patent
Elektronische Ressource
Englisch
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last / B65G TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS , Transport- oder Lagervorrichtungen, z.B. Förderer zum Laden oder Abladen |