Three-folding door device for elevator

The utility model relates to the technical field of a landing door device for elevators, which comprises an upper weir rack, a sill and door plates, a link device, a door switch, a hook component, a guiding rail, a left guide sleeve and a right guide sleeve on both sides and heavy hammers in the guide sleeves in the upper weir rack. In the utility model, the number of the door plates is equal to six; the door plates are symmetrically open towards both sides from the middle; each side has three door plates with different movement speed; the fast speed doors, the middle speed doors and a slow speed doors are respectively arranged from the middle to both sides; the displacement ratio of the three kinds of doors is equal to 3/2/1; two sets of wire rope driving devices adopting a movable pulley principle and two sets of hook components are arranged between the three landing doors which are divided to the left side and the right side from the middle respectively for dragging the and locking the doors. The weight of each door plate in the wide span elevator landing door of the utility model is not large, a mechanical link device is arranged between slide plates and connecting plates of the three doors, the opening and closing of the doors are smart and normal, and the utility model has the advantages of simple structure and high safety.