Protective apparatus for the monitoring of a protected zone to be moved with a component

A protective apparatus for securing to a component (32) movable along a track (B) and for the monitoring of a protected zone (62;

• 82;
• 110) to be moved with the component (32), the protective apparatus comprising
• a light transmitter (42;
• 64;
• 84) for the radiation of a divergent transmitted light beam (50, 50′;
• 76;
• 98) into a spatial zone containing the protected zone (62;
• 82;
• 110);
• a light receiver (44;
• 64;
• 84) for the reception of at least some of the light of the transmitted light beam (50, 50′;
• 76;
• 98) of the light transmitter (42;
• 64;
• 84) radiated into the spatial zone and for the emitting of corresponding reception signals;
• and
• a restriction device (52;
• 68;
• 102) which is arranged in the direction of a transmitted light path after a section of the transmitted light path which contains the protected zone (62;
• 82;
• 110) and by means of which the transmitted light beam (50, 50′;
• 76, 8) can be restricted to a less divergent received light beam (58;
• 80;
• 108) determining the width of the protected zone (62;
• 82;
• 110) in at least one direction.