US 2003/0116675 A1Published application

Friction winding shaft for reversible rotation

AssigneeHans-Jorg Heuser

InventorHans Heuser

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Abstract

The instant invention relates to a friction winding shaft (6, 7), in particular for roll cutting and winding machines (1), where the shaft frictionally engages tubular winding cores (16) for the winding of strip-shaped bands (5) or similar items. A plurality of winding rings (12) adjoin each other as disposed on a central drive shaft (8). In addition spring-biased winding core holders protrude from an outer ring surface (23) and are distributed over the ring surface in the form of clamping elements (25). The clamping elements are seated in recesses (29) of the rings (12) and are capable of pivoting around axes (32) that are parallel to the friction winding shaft axis (37). The recesses (29) are provided with stop surfaces (30, 31) on both sides to limit the pivoting movement. In order to further increase the application possibilities of the friction winding shaft (6,7), the invention provides for the two stop surfaces (30, 31) to be sized and arranged in such manner that the clamping elements (25), in their center positions between the pivot stop positions, form a circular curve (42) with their clamping element tips (27) having a diameter dt greater than dw.

Claims15

Dependent claims

A friction winding shaft for a roll cutting and winding machine and the like to frictionally engage tube-shaped winding cores disposed on the winding shaft on which strip bands and the like are wound, said friction winding shaft including a plurality of rings disposed on a central drive shaft and adjoining one another, a plurality of winding core clamping elements protruding from an outer surface of said winding rings having clamping element tips for interlocking with the winding cores for driving the winding cores in rotation, said clamping elements being seated in recesses formed in the winding rings, and said clamping elements being pivotally carried in said recesses about a pivot axis parallel with the friction winding shaft axis, and stop surfaces formed on sides of said recesses to limit the pivoting movement of the clamping elements, wherein said friction shaft comprises:

first and second stop surfaces formed on first and second sides of said winding ring recesses;
winding rings having clamping elements with a first stop position against said first stop surfaces of said recesses and second stop positions against second stop surfaces of said recesses;
clamping element tips formed on free ends of said clamping elements for engaging and exerting a rotational drive force on the winding cores when installed on said winding rings;
a circular curve being defined by said clamping element tips when pivoted to one of said first and second stop positions having a diameter de which is small than or equal to a diameter dw, the inside diameter of said winding cores;
and
said clamping element tips having a center position between said first and second stop positions radially aligned with a radial of said winding rings which defines a circular curve with a diameter dt greater than dw.

3 more elements

first and second stop surfaces formed on first and second sides of said winding ring recesses;
winding rings having clamping elements with a first stop position against said first stop surfaces of said recesses and second stop positions against second stop surfaces of said recesses;
said clamping elements having a center position defined between said first and second stop positions;
clamping element tips formed on free ends of said clamping elements for engaging and exerting a rotational drive force on the winding cores when installed on said winding rings;
said winding rings having a first driving position when said clamping elements are pivoted away from said center position towards said first stop positions wherein said clamping elements are engaged with said winding cores for driving said winding cores in a first rotational direction;
said winding rings having a second driving position when said clamping elements are pivoted away from said center position towards said second stop positions wherein said clamping elements engaged with said winding cores for driving said winding cores in a second rotational direction;
and
said first and second driving positions being selectable when installing said winding cores without removing said winding rings from said friction shaft so that the rotational direction of said winding cores may be selected depending on the application being made.

5 more elements

Dependencies are inferred from the claim text.