Column for a light barrier assembly, has light transmitter, light receiver and or mirror with the whole assembly having means for preventing its damage due to a collision with a moving object, e.g. by lowering it into the ground

摘要

Column (2) for a light barrier arrangement has at least a light transmitter (3) and or a light receiver (7) and or a mirror (12) for deflection of a light beam. The column has means for preventing damage to the column due to collision with a moving object, e.g. a transport means, such as a motor vehicle. In particularly the column can be lowered into the ground.