Bobbin holder has adjustment units with at least two arms of different lengths, with clamping studs, to be set rapidly on a change of bobbin sleeve diameter to give a firm grip with accurate centering

摘要

The holder system for supply bobbins, with cylindrical bobbin sleeves, has clamps with adjustment units (6-8) which swing on axes (9) parallel to the holder axis (1). They have at least two arms (11, 12) of different lengths to carry the clamps (13). A change mechanism moves the adjustment units between at least two positions to bring the clamp against the inner surface of the bobbin sleeve by one arm or the other. The bobbin holder has adjustment units which extend over the whole length of the holder. The clamps are of an elastic material, as studs (15, 16). A carrier disk (3) is at one end of the adjustment units, keyed to the holder axis, with the swing pins for the adjustment action. The setting unit to change the orientation of the adjustment units is at the other end, as a setting disk with guide paths for the guide pins at the adjustment units.