Patent ID: 8777286

Claim:
An unpacking device for glass substrate, including a bracket and a plurality of sucking heads mounted thereon, wherein the unpacking device is incorporated with a plurality of altitude sensors arranged between the sucking heads and the bracket; wherein each of the sucking heads includes a guiding post, a spring member, and a sucking end at a lower end, an end of the guiding post is interlinked to the altitude sensor, and another end of the guiding post interlinks to the sucking end, the spring member is sleeved onto the guiding post, and is located between the altitude sensor and the sucking end; wherein when the spring member is naturally uncompressed, the corresponding altitude sensor is set to a turned-off position, and when the spring member is compressed, the altitude sensor is triggered to a turned-on position wherein when any one of the altitude sensors is turned on asynchronically with other sensors during the descending of the sucking heads toward a working target, it represents an abnormal working position, the sucking heads will stop descend immediately; and wherein further comprises an alarm device which will be triggered to sound when an abnormal condition is encountered.