Chain type dragging unidirectional offset adjustment machine

Disclosed is a chain-type traction one-way deviation adjustment apparatus, which relates to a rubber belt deviation prevention mechanism used to a transportation rubber belt machine. The apparatus includes a frame, a middle roller, a left roller and a right roller, wherein, the middle, the left and the right rollers are supported by a roller rack. The left side of the left roller and the right side of the right roller are provided respectively with a left retaining arm and a right retaining arm. The center of the roller rack is fixed with a central support shaft. A central bearing, a left bearing and a right bearing are positioned on the frame. The central support shaft, the left retaining arm and the right retaining arm are installed on the frame through the central, the left and the right bearings respectively. A central belt pulley, a left pulley and a right pulley are arranged in the frame in a horizontal direction. A closed conveyer belt is arranged on the left and the right belt pulleys. The external pa