1. An arrangement of an excavating chain for conveying ballast of a track bed extending in a first plane, the excavating chain
being comprised of a succession of linked chain links and being driven in a second plane inclined with respect to the first
plane in an operating stage, and a guide wherein the excavating chain is guided, the guide comprising a transverse guide section
positioned in a line of intersection of the first and second planes, in the operating stage, and longitudinal guide sections,
the longitudinal guide sections being connected to ends of the transverse guide section by joints having a vertical axis and
the guide sections defining a guide channel for the excavating chain, the guide channel being defined by a lower glide track
and an upper glide track extending parallel to the second plane and an end glide track extending perpendicularly to the second
plane, the end glide track connecting the lower and upper glide tracks, wherein the end glide track of the transverse guide
section is curved around the joints connecting the ends of the transverse guide section to the adjoining longitudinal guide
sections, the curved end glide tracks of the transverse guide section enclosing an acute dihedral angle α with an imaginary
plane of elongation of the end glide track of a respective one of the longitudinal guide sections whereby the excavating chain
is deflected solely from the transverse to the longitudinal guide sections by contact with the end glide track.
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