| 摘要 |
The invention relates to a device (1) for gripping and retaining PET bottles (3) in filling systems or the like, comprising a passive clamping system having pivotable gripping arms (6) acted on by a spring (4) and/or permanent magnets (5), wherein said device should be further developed in such a way that not only are the closing forces optimally applied, but also the gripping arms (6) are capable of automatically assuming the center position by means of restoring forces (centering), and a nearly horizontal overall spring characteristic curve is achieved by the combination of the compression spring (4) with attracting permanent magnets (5), and thus retaining forces of a similar magnitude are achieved regardless of the mouth diameter. The centering effect is achieved among other things in that the gripping arms (6) have extensions (8) on the other side of the respective pivot axis (7), said extensions having rod- or rail-shaped receptacles (9), in particular cylindrical receptacles (9), for guiding at least one compression spring (4) and for applying a bending force to the compression spring (4) or to sub-segments of the compression spring (4). |
