Friction winding shaft

A friction winding shaft for a winding machine having a central drive shaft, said friction winding shaft comprising:

• a plurality of pressure elements carried by said drive shaft;
• a plurality of drive rings carried by said drive shaft in contact with said pressure elements;
• said drive rings including inner friction rings and outer concentric holding rings, said pressure elements pressing against an inside surface of said friction ring;
• said friction rings and associated holding rings being rotatable relative to each other;
• a plurality of winding core retainers carried by said holding rings for engaging a winding core fitted on said winding shaft;
• a plurality of winding core supports carried on said outer rings;
• said winding core retainers and winding core supports being alternating and circumferentially spaced around said outer holder rings;
• an actuator for actuating said winding core support so that said friction ring, holder ring, and winding core are rotated together in a drive direction of said drive shaft;
• and
• said winding core supports including a pressure rod which is held in a guide for radial movement relative to said holding rings.

A friction winding shaft for a roll cutting and winding machine, said machine having a central, elongated drive shaft with movable and controllable pressure elements installed in recesses formed in a circumference of said drive shaft;

• a plurality of rings fitted on said drive shaft and adjoining each other, said pressure elements pressing against the inside surfaces of said rings for friction contact;
• winding core retainers distributed over a circumference of said ring which protrudes elastically beyond outer surfaces of said rings for the reversible retention and non-rotatable coupling of tubular winding cores installed on said rings, said winding cores winding up bands;
• and said winding cores having inside diameter tolerances in which said winding core retainers move under spring action, wherein said friction winding shaft comprises:
• a plurality of rings surrounding said drive shaft which include inner friction rings and concentric, outer holding rings;
• a plurality of pressure elements pressing against an inside surface of said friction rings;
• said winding core retainers being installed on an outside surface of said holding rings;
• said friction rings and said associated holding rings being rotatable relative to each other;
• at least one sloped guide provided at said outside surface of said friction ring;
• at least one winding core support movably carried on said holding rings which engages said sloped guide in such a manner that, when said holding ring is rotated relative to said friction ring in an opposite direction of said drive shaft, said winding core support can be moved beyond said outside surface of said holding rings into a contact position against an inside winding core surface of an installed winding core;
• said sloped guide having a slant and length so that said winding core supports can be moved at least within said inside diameter tolerances of said winding cores;
• and
• said winding core supports including contact elements in form of an arc which press against said inside winding core surface and generally conform to the shape of said inside winding core surface.

A friction winding shaft for a roll cutting and winding machine, said machine having a central, elongated drive shaft with movable and controllable pressure elements installed in recesses formed in a circumference of said drive shaft;

• a plurality of rings fitted on said drive shaft and adjoining each other, said pressure elements pressing against the inside surfaces of said rings for friction contact;
• winding core retainers distributed over a circumference of said ring which protrudes elastically beyond outer surfaces of said rings for the reversible retention and non-rotatable coupling of tubular winding cores installed on said rings, said winding cores winding up bands;
• and said winding cores having inside diameter tolerances in which said winding core retainers move under spring action, wherein said friction winding shaft comprises:
• a plurality of rings surrounding said drive shaft which include inner friction rings and concentric, outer holding rings;
• a plurality of pressure elements pressing against an inside surface of said friction rings;
• said winding core retainers being installed on an outside surface of said holding rings;
• said friction rings and said associated holding rings being rotatable relative to each other;
• at least one sloped guide provided at said outside surface of said friction ring;
• at least one winding core support movably carried on said holding rings which engages said sloped guide in such a manner that, when said holding ring is rotated relative to said friction ring in an opposite direction of said drive shaft, said winding core support can be moved beyond said outside surface of said holding rings into a contact position against an inside winding core surface of an installed winding core;
• said sloped guide having a slant and length so that said winding core supports can be moved at least within said inside diameter tolerances of said winding cores;
• and
• a turn-back spring installed between said holding ring and said friction ring in such manner that a rotation of said holding ring relative to the friction ring is created in a direction of drive shaft rotation, and a spring force of said pull-back spring is sized so as to be lower than a force between said holding ring and said friction ring produced by a tension during the winding process.

A friction winding shaft for a machine having a central drive shaft, said friction winding shaft comprising:

• a plurality of pressure elements carried by said drive shaft;
• a plurality of drive rings carried by said drive shaft in contact with said pressure elements;
• said drive rings including inner friction rings and outer concentric holding rings, said pressure elements pressing against an inside surface of said friction ring;
• said friction rings and associated holding rings being rotatable relative to each other;
• a plurality of winding core retainers carried by said holding rings for engaging a winding core fitted on said winding shaft;
• a plurality of winding core supports carried on said outer rings;
• said winding core retainers and winding core supports being alternating and circumferentially spaced around said outer holder rings;
• an actuator for actuating said winding core support so that said friction ring, holder ring, and winding core are rotated together in a drive direction of said drive shaft;
• and
• said winding core supports include contact elements in form of an arc which press against said inside winding core surface and generally conform to the shape of said inside winding core surface.