Roller shutter door device

The utility model discloses a roller shutter door device which comprises a door frame, an installation frame, a bearing, a door shaft, a roller shutter door and a retainer. The two installation frames are fixedly installed on one side of the door frame, bearings are arranged on the opposite sides of the two installation frames, the two ends of the door shaft are movably connected with the two installation frames through the bearings respectively, the roller shutter door is installed on the door shaft, and one end of the door shaft is fixedly sleeved with a ratchet wheel. The retainer is mounted on the door frame, and the end part of the retainer is provided with a telescopic retaining end; when the roller shutter door is opened, the door shaft rotates anticlockwise, and the stop end slides on the tooth back of the ratchet wheel; when the roller shutter door is closed, the stop end is inserted into the tooth groove of the ratchet wheel, and the door shaft is prevented from rotating clockwise. According to the