Driver roller, in particular for drive belts of a thread supply device on a textile machine

A driving roller with an outer working periphery having a changeable diameter, comprising a first disk and a second disk arranged coaxially with one another and rotatable relative to one another in any operational condition, said first disk being provided with a plurality of radial guides, said second disk being provided with at least one spiral-shaped guide;

• a plurality of supporting bodies which have segments provided for abutment of a drive belt, first means cooperating with said radial guides and second means cooperating with said at least one spiral shaped guide and are supported by both of said means so that by a relative rotation of said disks an increase or a reduction of the diameter of the working periphery is provided, said radial guides being formed by guiding slots extending through said first disk, said first means being composed of guiding members which are slidingly guided in said guiding slots, said guiding members at both sides of said first disk being provided with guiding webs which laterally extend over said guiding slots, and a cover disk, said segments being arranged between said first disk and said cover disk.

A driving roller as defined in claim 15, wherein said first disk and said cover disk are fixedly connectable with one another.

A driving roller with an outer working periphery having a changeable diameter, comprising a first disk and a second disk arranged coaxially with one another and rotatable relative to one another in any operational condition, said first disk being provided with a plurality of radial guides, said second disk being provided with at least one spiral-shaped guide;

• a plurality of supporting bodies which have segments provided for abutment of a drive belt, first means cooperating with said radial guides and second means cooperating with said at least one spiral shaped guide and are supported by both of said means so that by a relative rotation of said disks an increase or a reduction of the diameter of the working periphery is provided, said radial guides being formed by guiding,slots extending through said first disk, said first means being composed of guiding members which are slidingly guided in said guiding slots, said guiding members at both sides of said first disk being provided with guiding webs which laterally extend over said guiding slots, said second disk having a hub;
• and a shaft having an abutment shoulder for said first disk and another portion of an increased diameter which is formed as a rotatable support of said hub.