Lifting type material supporting device

The utility model discloses a material supporting device capable of ascending and descending. The device is used for being installed on a workbench of the plate shearing machine. The device comprisesa supporting seat, a shaft sleeve, threaded sleeves and screws, a material supporting ball is arranged on the supporting base, the shaft sleeve is arranged on the inner side face of the supporting base, threads are further arranged on the inner circle face of the shaft sleeve, the threaded sleeve is arranged on the shaft sleeve through the threads, internal threads are arranged on the inner circleface of the threaded sleeve, the screw is arranged on the supporting base and penetrates through the threaded sleeve to be matched with the internal threads, and the tail end of the screw is connected with the workbench. The utility model discloses a material supporting device capable of ascending and descending. The structure of the shaft sleeve, the thread sleeve and the screw is adopted. The overlapping length of the t