GB1333834A - Blind rivetting gun with automatic loading means - Google Patents

Abstract

1333834 Blind riveting RIVTAC BLINDNIETEN AG 19 April 1971 [3 April 1970] 25868/71 Heading B3U A belt 3 having cylindrical extensions 3a is used to automatically feed blind rivets 4, whose mandrels 4a are inserted in the extensions 3a, to a rivet setting mechanism. In operation, a nose 17a of a slide 17 is moved through a notch in the belt by a slide 11 and jaws 15 are opened by the movement of a pusher 12 on clamps 13. A rivet 4 is carried by the nose 17a towards a setting punch 5 while the rivet mandrel 4a is gripped by the jaws 15 when the clamps 13 contact shoulders 21. At the end of the stroke, levers 18 are spread apart by the nose 17a and the rivet inserted in a workpiece. On retraction of the slide 11, the levers 18 drop in behind the preformed rivet head and jaws 15 pull the mandrel to set the rivet. After the rivet mandrel has sheared, the remainder is reinserted in the extension 3a. The slide 17 has shoulder 17b which push spring-biased shafts 23 to the right as seen in Fig. 8 when the slide 11 is advanced so that claws 28 are opened and move past an extension 3a whereupon the claws are closed by a spring-loaded pusher 26. The belt 3 is held against movement until the sheared portion of the mandrel is reinserted in extension 3a by elongate shoulders 17c which extend into a notch 3b. The shoulders 17c clear the notch 3b after reinsertion of the sheared mandrel so that the belt can be driven in the direction of arrow a by springs 24.