DOOR OPENING/CLOSING DEVICE

PURPOSE:To smoothly open/close a door by improving the rigidity of a door pulling-out structure to suppress an influence of the clearance of a pulling-out mechanism part. CONSTITUTION:An upper door support frame 3 and a lower door support frame 4 which are moved in the longitudinal direction of a main body case 1 and are long in the transverse direction are provided correspondingly to the upper side part and the lower side part of a rectangular aperture part in the front of the main body case 1, and a door 2 moving in the transverse direction is attached to these frames. Two pairs of wires 25 and 26 in total are stretched between right and left upper and lower members 6 and 5 through fixed pulleys 19 to 23 with pins 17 as fixing positions. Even if the pulling-out force unevenly acts on one of right and left upper and lower members 6 and 5 at the time of pulling out the door 2 together with the upper door support frame 3 and the lower door support frame 4, they are moved while receiving the common tension by wires 25 and 26 stretched between them, and the door 2 is smoothly pulled out and is opened/closed.