A fastening apparatus for placing sets of threaded caps on containers for packaging machines.

摘要

Fastening apparatus (1) sets (2) of capping screw machines for packaging containers, in particular of the type installed in units (1a) positioning screw caps such machines, comprising at least one clip (4) able to move on a set (2) of capping screw between a position of engagement, which is gripped and held a lid by the clamp (4), and a rest position, in which the clamp (4) does not grasp any cover, provided with at least two retaining arms (5) each having at least one structural member (6) fixed with freedom to pivot in the respective set (2) placement screw caps, and at least one contact element (11) associated with freedom of extraction with the relative structural member (6), positioned to interact directly with a cap when the gripper (4) is in the position of engagement, characterized - by the fact qu and each retaining arm (5) of the clamp (4) is provided with automatic locking means (12) through which the respective structural member (6) and the corresponding contact element (11), once mutually approached , they are kept joined together safely and stably; - in that the automatic locking means (12) can be separated forcibly by applying external pressure in a given conditions disconnecting and separating from each other the structural member (6) and the contact element (11).