Lifting appliance for stiff beam

The utility model discloses a sling for stiff beam, relates to sling field, including connecting mechanism, left clamping unit and right clamping unit, connecting mechanism includes lift shaft and connecting shaft, connecting shaft is provided the lower part of lift shaft, the left clamping unit includes short hinge shaft, two inner draw arm and inner connecting arm, the right clamping unit includes the short hinge shaft, the two inner draw arm and the inner connecting arm. According to the utility model, the lifting shaft is connected with the lifting hook, the lifting shaft is lifted through the matching of the lifting equipment and the lifting hook, and then the right side clamping plate and the left side clamping plate are close to each other and clamp a beam body under the matching of the lifting shaft, the connecting shaft, the short hinge shaft, the inner traction arm, the inner connecting arm, the long hinge shaft, the outer traction arm and the outer connecting arm; the lifting shaft is continuously