TRAY CHANGER

PURPOSE:To carry an object continuously in/out of a working machine, by providing a tray containing section in the machine body and moving a selected tray to a desired boxing position through a carry in/out means arranged at the opposite side from a carry in/out port. CONSTITUTION:A tray table 13 and a stopper for stopping forward motion of tray are provided in both supports 11 of a rack 1, and a tray lifting/retracting device 3 is arranged at the opposite side from the carry in/out face of the tray. The tray lifting/retracting device 3 comprises a lift motor 31, a lift screw 36, a retractable table 39, etc., where a front stopper release mechanism, a tray carry in/out mechanism and a tray positioning mechanism are assembled onto the tray retraction table 39 which is moved up and down through rotation of the lift screw 36. With such arrangement, carry-in and carry-out work of tray can be carried out simultaneously.