Steel belt conveying buffer device

The utility model relates to a steel belt conveying buffer device which comprises a gantry type rack, a fixed pulley block is installed at the top of the rack and comprises an input fixed pulley, a plurality of middle fixed pulleys and an output fixed pulley which are distributed side by side from right to left, and the input fixed pulley is used for being connected with a steel belt output by a steel belt releaser; a movable pulley block driven by a lifting mechanism to vertically ascend and descend is arranged in the lower end of the rack and comprises a plurality of movable pulleys distributed side by side from right to left, and a steel belt is input from the input fixed pulley, sequentially and alternately bypasses the movable pulleys and the middle fixed pulley and finally output from the output fixed pulley. The steel belt releasing device is simple in structure and reasonable in design, after releasing of a steel belt on the steel belt releasing device is finished, the steel belt has certain allowance