Patent ID: 6129396
Filing Date: 2000-10-10
Classification: B66C

Abstract:
A container-piling spreader comprising:a spreader body having, on the four corners of its bottom surface, means for engaging and hanging a container; a pair of elevation guides, the two elevation guides being mounted on the front end and the rear end, respectively, of the spreader body so as to be swingable in a vertical plane, and extendible downward and contractible upward;a pair of guide frames, each guide frame mounted, horizontally and in the direction of width of the container, on the bottom of one of the paired elevation guides;a pair of retractable stoppers, each of which is mounted on one of the paired guide frames and can be advanced to catch the bottom of the container hoisted by the spreader body and retracted from an advanced position;two pairs of guide flippers, the guide flippers of each pair mounted on both ends, respectively, of one of the paired guide frames;two pairs of direction-changing guides, each direction-changing guide mounted on a side of one of the guide flippers;at least one pair of winches mounted on the spreader body, one winch being disposed near the front end of the spreader body, the other winch being disposed near the rear end of the spreader body; andtwo pairs of pulling strings, each pulling string having one end fixed substantially to a guide flipper and stretching diagonally upward to have the other end wound on one of the paired winches positionally corresponding to said guide flippereach of the paired winches being driven by an oil-hydraulic motor, each of the oil-hydraulic motors being provided with a relief valve which is connected between two oil-hydraulic lines leading to two inlet/outlet ports, respectively, of said oil-hydraulic motor.