Normal production, the left and right sides of the motor driven conveyor chain plate drives the bottle into the side of the bottle, on the other side out of the bottle, middle frame within a certain distance before and after the movement, the buffer platform on the accumulation of little bottles, when out of the bottle side just behind the buffer platform equipment downtime, buffer platform out of the bottle side motor stops, the intermediate moving backward, buffer platform with the bottle. To eliminate the fault, the bottle side motor start, middle mobile rack to move forward, buffer platform on the bottle to the subsequent equipment.