Patent ID: 7084388

Claim:
Automatically activatable door which has an essentially vertical opening plane, lateral delimitations, an inner side and an outer side and inner and outer approach areas which are level with the floor and are respectively located on the inner side and on the outer side, and an activating device, which comprises the following: a door drive which is coupled to the door and has a door opening mode and a door closing mode; a monitor system that has the purpose of monitoring a region assigned to at least one of the approach areas, the monitoring system including at least a first detector that generates a detector beam for obstructing objects which possibly block a closing movement of the door, and detects echo signals from obstructing objects, the monitor system generating a monitor signal when an obstructing object which is located in the respective approach area is sensed by the detector; and a control device which is connected to the door drive, is operatively coupled to the monitoring system to receive a monitoring signal from the monitoring system, deactivate and/or change the direction of the door drive if in the door closing mode when the monitoring signal occurs; wherein the detector is embodied as a scanning detector which is mounted next to a lateral delimitation of the door opening at a height which is matched to the maximum height of objects which are supported on the respective approach area and are not to be sensed as obstructing objects, and which scans, with a scanning detecting beam, a horizontal fan located above the respective approach area as a monitored region and which is shallow in the vertical direction, determined by the thickness of the scanning beam, and whose radial dimension, which is determined by the maximum measuring range of the scanning detector, is selected in accordance with the magnitude of the respective approach area.