Abstract:
A crane spreader for use in lifting a container includes an attachment unit (120), a head block (100), a frame unit (110), a position adjustment unit (130) and a fixation unit (140). The attachment unit detachably attaches the crane spreader to an upper surface of the container. The head block has a pulley connected to a trolley of a crane through a cable and coupled to the attachment unit to restrict a horizontal movement the attachment unit with respect to the head block. The frame unit is supported by the head block to be horizontally movable with respect to the head block, the frame unit being disposed below the head block with a gap therebetween. The position adjustment unit aligns the frame unit with the container by displacing the frame unit with respect to the attachment unit. The fixation unit engages the container with the frame unit.
Abstract:
A crane for loading and unloading a cargo includes multi-stage trolley. The multi-stage trolley for a crane includes a first trolley movable in a longitudinal direction along a boom of the crane; a second trolley movable in a lateral direction on the first trolley; a hoisting wire provided in the longitudinal direction along the boom; a spreader connected to the hoisting wire through the first trolley and the second trolley and supported by the hoisting wire, the spreader being movable in a vertical direction according to a movement of the hoisting wire. The multi-stage trolley further includes a sheave block unit for changing a direction of the hoisting wire to maintain a vertical level of the spreader constant when the first trolley and/or the second trolley is moved.
Abstract:
A crane spreader for use in lifting a container includes an attachment unit (120), a head block (100), a frame unit (110), a position adjustment unit (130) and a fixation unit (140). The attachment unit detachably attaches the crane spreader to an upper surface of the container. The head block has a pulley connected to a trolley of a crane through a cable and coupled to the attachment unit to restrict a horizontal movement the attachment unit with respect to the head block. The frame unit is supported by the head block to be horizontally movable with respect to the head block, the frame unit being disposed below the head block with a gap therebetween. The position adjustment unit aligns the frame unit with the container by displacing the frame unit with respect to the attachment unit. The fixation unit engages the container with the frame unit.
Abstract:
A crane for loading and unloading a cargo includes a trolley assembly (200). The trolley assembly (200) includes a first trolley (210) movable in a longitudinal direction along a boom of the crane; a second trolley (220) movable in a lateral direction on the first trolley (210); a hoist (250) provided on the second trolley (220); a spreader (260) movable in a vertical direction by the hoist (250); a light emitting unit (270) provided on the spreader (260); and a smart camera (280) for capturing an image of the light emitting unit (270) to measure a movement of the spreader (260). A movement of the hoist (250) is controlled by a location control unit (290) based on the measured movement of the spreader (260).