Cow driver for sending cows to milking stand has safety device that outputs safety signal to controller if railing encounters obstacle to interrupt movement of railing

摘要

A displaceable railing (10) is held between the frames (12,14). A controller operates a drive (20) to move the railing forward and backward along running rails. A safety device outputs a safety signal to the controller if the railing encounters an obstacle such that the controller interrupts the operation of the drive.