Multiple signaling hinged safety switch for mobile protection barriers

摘要

A multi-signaling hinged safety switch for mobile protection barriers includes a fixed member designed to be secured to a stationary part of the barrier and having a pair of axial end holes, a movable member designed to be secured to a pivotal part of the barrier and having a pair of substantially transverse arms located outside the fixed member and pivoted to the axial end holes, an electrical detection system within the fixed member switching one or more electric safety circuits of the barrier at a predetermined switching angle. A pair of cylindrical pins extend in cantilever fashion from the arms and are pivotally inserted in the holes, with mutually spaced opposed ends defining a gap with no axial connection member therein. The detection system includes a pair of detectors each interacting with one end of a pin and having a switching angle that are operatively independent of each other.

主权项

1. A multi-signaling hinged safety switch for protection barriers (B) of machines or automatic plants, comprising:
a substantially box shaped fixed member (2) which is designed to be secured to a stationary part (M) of a protection barrier (B), said box shaped member (2) having a longitudinal axis (L) and a pair of axial end holes (3, 4); a movable member (5) which is designed to be secured to a pivotal part (P) of the protection barrier (B) and has a pair of substantially transverse arms (6, 7) extending from said fixed member (2) and pivoted to said axial end holes (3, 4); electric detection means (8) located within said box shaped member (2) for switching one or more electric safety circuits (S) of the barrier (B) at a predetermined switching angle (α); and a pair of cylindrical pins (9, 10) that extend in cantilever fashion from said arms (6, 7) and are pivotally inserted in said holes (3, 4), said pins (9, 10) having mutually spaced opposed ends (11, 12) defining a gap (13) with no axial connection member therein, wherein said detection means (8) comprise a pair of detectors (14, 15), each interacting with an end (11, 12) of a pin (9, 10) and having a switching angle (α, α′), and wherein said detectors (14, 15) are operatively independent from each other.