Tensioning device and transpositioning device with the tensioning device

摘要

A tensioning device ( 32 ) for tensioning at least two, substantially length-invariant belts ( 18, 24 ) includes a first belt ( 18 ) guided about a first axis (A), which repeatedly guides an adjusting movement in an adjustment direction substantially orthogonal to the axial direction of the first axis (A). In addition, the first belt ( 18 ) and a second belt ( 24 ) are guided about a common second axis (B), whereby the tensioning directions (V₁₈, V₂₄) of the first belt ( 18 ) and of the second belt ( 24 ) in a region of the second axis (B) forms a varying angle of between 0° and 180°. The second axis (B) is associated with a spring unit ( 40 ), which prestresses in the sense of the tensioning of the first belt ( 18 ) and the second belt ( 24 ) and which, upon an adjusting movement of the first axis (A), permits a compensating movement of the second axis (B) from the plane covered by the axial direction of the second axis (B) with the tensioning directions (V₁₈, V₂₄) of the first belt ( 18 ) and of the second belt ( 24 ), respectively, before initiating of the adjusting movement.