Gripper equipment on box filler

The utility model discloses gripper equipment on a box filler capable of gripping a barrel with larger capacity. The gripper device comprises an air cylinder arranged on a top plate of a gripper mounting frame, wherein a piston rod of the cylinder penetrates through a mounting hole in the top plate of the gripper mounting frame and is connected with a connecting rod with a rotary limit block, and rotary limit slots are respectively formed in the two sides of the rotary limit block; clamping and supporting brackets are movably arranged on revolving shafts on the gripper mounting frames at the two sides of the rotary limit slots, the outer surface of upper end of every clamping and supporting bracket is a spherical surface, and the upper end of each clamping and supporting bracket is bent and protrudes into the rotary limit slot of the corresponding side and can rotate in the rotary limit slot in the corresponding side and cannot be separated from the rotary limit slot; a clamping and supporting block is fixedly arranged inside the lower end of every clamping and supporting bracket, the openings of the barrel is respectively clamped by the clamping and supporting blocks at the two sides of the cylinder when the piston rod of the cylinder retracts upward; when the piston rod of the cylinder elongates downwards, the opening of the barrel is respectively released by the clamping and supporting blocks at the two sides of the cylinder.