Abstract: A device for arrangement on a body comprising an essentially rotation-symmetric portion. The device comprises at least one interface that comprises two clamps with at least one pivot axis, each clamp comprising a clamp tip, the respective clamp tip being arranged opposite of the at least one pivot axis and the pivot axis being arranged fixed in relation to a base structure comprised by the device. The clamps are configured to be pivoted around the at least one pivot axis between a first position and a second position, respectively, wherein in the first position, the clamp tips are spaced further from each other than in the second position. A support structure is arranged between the clamps. A support rope system has at least one support rope, with at least one support rope of the rope system being connected to a tensioning element fixed with respect to the base structure.