The glass is supported and transported by a conveyor roller, which is driven by a motor (roller pressing section motor) through a frequency converter and a sprocket. The glass enters this section at low speed from the cleaning and drying section, and after passing the inspection, accelerates to the next working section to improve work efficiency; The operating speed of the speed regulating motor in this section is controlled by a frequency converter, and the photoelectric switch controls the glass to enter the next working section.