Landing door device suitable for underground mining elevator

The invention relates to a car door device suitable for an underground mining elevator. The car door device comprises a counter weight, two door frame columns respectively fixed on car walls on two sides of a car door, door guide rails fixed on the door frame columns, a door cradle with two ends connected with the upper ends of the door guide rails, a low-speed door board assembly, a high-speed door board assembly and linkage steel wire ropes and is characterized in that the upper ends of the two door frame columns are respectively fixed at two ends of a door lintel, and the lower ends of the two door frame columns are respectively fixed at the car bottom. The counter weight is arranged in a counter weight guide frame and operates in the counter weight guide frame. The car door device is suitable for mine elevators with various special mine environment requirements and is especially suitable for a round-shaft mine elevator with small shaft size or a narrow door passageway. Due to the fact that the counter weight guide frame is adopted, the counter weight always operates in the counter weight guide frame, the safety of the mine elevator with large stroke and high speed in operation is improved, and simultaneously noise is reduced.