hoist & running route

[dep72]

Good morning.
I have created a structure, above a group of events with subbi, to which is bolted a road (binary) created with the sweep command.
the track (ipe) has a path equal to a "u" reversed: it has a straight stroke, a curve of 90° dx, another straight stroke, another curve at 90°dx to end with other straight part.
how can I bind the hoist so that it follows this path from start to finish?

 

[ninfh]

a transient bond is not enough? (maybe on a superextrusion for the route)

 

[dep72]

a transient bond is not enough? (maybe on a superextrusion for the route)

bind it to the axis of the road.