Adjustable width's supplementary device of rolling up

Adjustable width's supplementary device of rolling up, including support and two bearing bars, the support both sides are equipped with the guide rail, and the bearing bar both ends are equipped with the bearing bar support, and the bearing bar support sets up in the guide rail, is equipped with the screw rod in the guide rail, bearing bar support bottom be equipped with the screw and with the screw rod meshing, the below is equipped with the drive gear group of meshing with it in the middle of the screw rod of both sides, two drive gear components do not mesh in the gear at transmission shaft both ends mutually, support wherein one side is equipped with the hand wheel, gear engagement on transmission shaft one end and the hand wheel. The utility model discloses a supplementary device of rolling up is easy and simple to handle, and the motion is nimble, and occupation space is little, can be applicable to the various scrolls of rolling up the footpath, is difficult for toppling, and factor of safety is high.