Negative pressure adsorption device of glass loading and unloading machine

The utility model discloses a glass loading and unloading machine negative pressure adsorption device which comprises a transverse plate and a U-shaped hose, vertical plates are installed below the two sides of the transverse plate respectively, circular grooves are formed in the vertical plates respectively, and bearings are installed in the circular grooves respectively. An adjusting device is mounted on the transverse plate and comprises a double-end threaded rod and a moving part; the two ends of the double-end threaded rod are installed in inner rings of the bearings respectively, the moving part is installed on the double-end threaded rod, when the double-end threaded rod rotates forwards and backwards, the threaded sleeve drives the limiting block to move inwards or outwards along the limiting groove in the transverse plate, the threaded sleeve drives the suction cup to move inwards or outwards, and adjustment is conducted according to the length of glass. Carrying out adsorption; and the external thre