Manipulator for up-and-down reciprocating motion of automatic plate loading and unloading machine

Supporting rods are welded to the four corners of the top end of a rectangular frame, a horizontal plate is welded between the opposite supporting rods, a first lead screw is connected to the middle of the inner wall of the horizontal plate in a penetrating mode, a first motor is fixedly installed at the bottom end of the first lead screw, and a second lead screw is fixedly installed at the bottomend of the second lead screw. A transverse moving plate sleeves the position, corresponding to the middle of the inner wall of the horizontal plate, of the outer surface of the first lead screw, a second lead screw is connected to the middle of the inner wall of the transverse moving plate in a penetrating mode, and through a cleaning plate, an inclined groove, a silk screen, a fixing block, a sliding block, a connecting plate and a collecting box, the outer surface of the rectangular rod can be cleaned conveniently; the cleaning difficulty of the outer surface of the rectangular rod is reduced, meanwhile, the cleann