Patent ID: 8742281

Claim:
Spot welding cap changer comprising: a cap extractor and two cap magazines, the cap extractor having: a gripper with spring-loaded, pivoting jaws which in response to a turning and axial extraction movement detaches a spot welding cap of a pincer spot welding head inserted into the pivoting jaws from a shaft of the pincer welding head in such a way that the spot welding cap is clamped to prevent the spot welding cap from twisting, and the cap magazines holding spot welding caps respectively in a cap carrier in such a way that the spot welding caps are circularly arranged in a directed and oriented manner and are one by one transported by an advancing force against a stop, into an access position allowing the spot welding caps to be attached axially to the free shaft of the pincer and to extract them with the free shaft of the pincer, wherein the cap extractor has two opposed grippers, each with jaws that are open at their ends and can be rotated towards each other with approximately parallel toothed grip surfaces whose distance is smaller than a diameter of a spot welding cap, and each cap magazine has a cap carrier which, driven by a spring box, presses by way an advancing force one of the caps respectively against the stop.