Manipulator sucker operating signal trigger device

The invention discloses a manipulator sucker operating signal trigger device, which belongs to the technical field of grabbing manipulators. The manipulator sucker operating signal trigger device comprises a sucker installation frame and a vacuum sucker installed on the sucker installation frame, and also comprises an approaching sensor and a push rod, the push rod is telescopically installed on the sucker installation frame, the axis direction of the push rod is consistent with the moving direction of the vacuum sucker, the bottom end of the push rod is lower than the vacuum sucker, and the approaching sensor is installed above the top end of the push rod. During the descending process of the manipulator, the push rod first contacts a material and moves upwards, after the vacuum sucker stably touches the material, the top end of the push rod enters a sensing area of the approaching sensor so as to trigger the approaching sensor, and a vacuum assembly of the vacuum sucker is controlled to work, so that the manipulator sucker operating signal trigger device has the characteristics of long service life, no malfunction, no interference and the like.