Device for secured monitoring of closure position of two relatively movable portions, has mounting surface, which defines mounting plane relative to movable portions, where light beams run towards closure plane at acute angle

摘要

The device has an actuator (18) and a sensor (20), which are fixed to one of moving portions (12,14) such that a parting line (72) runs between the actuator and the sensor. A sensor housing (26) and an actuator housing (32) have a mounting surface (74a) for fixing to the movable portions. The mounting surface defines a mounting plane (76) relative to the movable portions, where a light beam (44a) and another light beam (44b) run towards a closure plane (42) at an acute angle (46). The closure plane lies perpendicular to the mounting plane and parallel to the parting line.