Mühle Tiefenbrunnen

The Mühle Tiefenbrunnen dates back to 1889 and it is a common sight for visitors to the Tiefenbrunnen train station in Zürich,

It has its own webpage, but still I have not been able to find out what the overhead passage was for. Could have been used for filling train cars with beer – or perhaps transferring grains from train into the factory?