Stacker crane tray clamping and supporting device

The invention discloses a stacker crane tray clamping and supporting device which comprises clamping and supporting mechanisms symmetrically arranged on supporting plate frames at the front end and the rear end of a bracket, and each clamping and supporting mechanism comprises a left swing rod and a right swing rod which are hinged to a supporting plate, wherein the outer ends of the left and right swing rods are hinged to a push-pull rod, and the inner ends of the left and right swing rods are hinged to a supporting rod, the left and right swing rods, the push-pull rod and the supporting rod form a parallelogram connecting rod assembly, the front end or the rear end of the push-pull rod is hinged to a cylinder rod I of a clamping and supporting air cylinder installed on the corresponding supporting plate, trays are located above the bracket and arranged on a cylinder rod II, extending upwards, of a jacking air cylinder, and the jacking air cylinder is installed at the position, below the bracket, of the jack