Stationary positioning device for a handling trolley having extendable centering finger assembly

A stationary positioning device for a handling trolley, comprising:

• at least one centering finger having a shape having a polygonal horizontal cross-section and a downwardly pointing trapezoidal vertical cross-section and a set of dimensions, wherein a means for connecting the at least one centering finger to the handling trolley rotatably fastens the at least one centering finger, the at least one centering finger having a vertical axis that is positioned coincidently with a longitudinal axis of the handling trolley;
• at least one recess located in a ring-shaped structure set into a ground structure, the at least one recess having the same shape and set of dimensions as the at least one centering finger;
• means for displacing said at least one centering finger between a transport position above a ground level and a positioning position where the at least one centering finger engages the recess;
• and
• longitudinal and transverse axes intersecting at a reference point located along a theoretical longitudinal path of the handling trolley, wherein the recess is positioned such that a vertical axis of the recess passes through the reference point and the recess has at least one side perpendicular to the theoretical longitudinal path.