Patent ID: 8788089

Claim:
An unloading system for unloading a first workpiece and a second workpiece hung on different sides of a rack from the rack, the unloading system comprising: a transferring mechanism comprising: a worktable; a transferring assembly mounted on the worktable for transferring the rack; and a clamping assembly movably mounted on the transferring assembly for clamping or releasing the rack; a sliding rod arranged parallel to a transferring direction of the transferring assembly and located above the transferring mechanism; a rotating assembly slidably mounted on the sliding rod and connected to the rack; at least two robot arms separately arranged adjacent to the worktable and equipped with a plurality of sensors; at least two unloading mechanisms respectively assembled to the at least two robot arms; and a controller electrically connected to the transferring mechanism, the rotating assembly, the at least two robot arms, the sensors and the at least two unloading mechanisms; wherein one of the sensors equipped on one of the at least two robot arms adjacent to the rack senses the rack and sends a signal to the controller, the controller controls the corresponding robot arm to move following the rack, and simultaneously drive the unloading mechanism toward the rack to unload the first workpiece from the rack, the clamping assembly releases the rack, thereafter, the rotating assembly rotates the rack to enable the second workpiece to face an another one of the at least two robot arms, the clamping assembly clamps the rack, the another one robot arm moves to be following the rack and drives the corresponding unloading mechanism to unload the second workpiece from the rack.