Nosepiece for installation of blind tubular rivets

B - Operations – Transporting – 21 – J

Patent

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Details

B21J 15/34 (2006.01)

Patent

CA 2052620

A nosepiece assembly for blind pull-through riveting tool has long nosepiece jaws (11a, 11a) for access in to deep, narrow cavities. The inside of the nosepiece assembly is provided with means for locking the jaws together at least when a rivet is being installed. The locking means comprises frusto-conical locking face (35) on the front end of a tube (34) fixed to the tool barrel (18), co-operating with two half frusto-conical faces on the inside of the jaws. The locking faces are normally urged out of engagement by the spring (20) and are urged in to locking engagement by the rearwards axial force exerted on the jaw anvil (25) by the head (33) of the rivet being installed. In a modification, the spring (20) normally urges the locking faces (35, 36) into engagement, and they are urged out of engagement by the next rivet being fed forwardly through the anvil parts (13, 13).

L'invention porte sur un embout pour un outil à river en aveugle à sens unique. L'outil comprend de longues mâchoires d'embout (11a, 11a) permettant d'accéder à l'intérieur de cavités profondes et étroites. L'intérieur de l'embout comporte un élément pour verrouiller les mâchoires ensemble, du moins lorsque l'utilisateur pose un rivet. L'élément de verrouillage comprend une face de verrouillage tronconique (35), à l'extrémité avant d'un tube (34) fixé au corps de l'outil (18), qui interagit avec deux demi-faces tronconiques sur la surface interne des mâchoires. Les faces de verrouillage sont normalement séparées de force par un ressort (20) et sont poussées en position de verrouillage par la force axiale vers l'arrière exercée sur l'enclume à mâchoires (25) au moyen de la tête (33) du rivet que l'utilisateur est en train de poser. Dans un autre aspect du modèle, le ressort (20) force normalement les faces de verrouillage (35, 36) à s'engager l'une dans l'autre, et le prochain rivet s'avançant dans les parties de l'enclume (13, 13) les sépare de force.

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