US3915404A

US3915404A - Rewind machine

Info

Publication number: US3915404A
Application number: US498351A
Authority: US
Inventors: Eberhard Kampf; Manfred Mattig
Original assignee: Erwin Kampf GmbH and Co Maschinenfabrik
Current assignee: Erwin Kampf GmbH and Co Maschinenfabrik
Priority date: 1973-08-23
Filing date: 1974-08-19
Publication date: 1975-10-28
Anticipated expiration: 1992-10-28
Also published as: DE2342515C2; DE2342515B1; NL7410554A; FR2241482A1; FR2241482B1; GB1453908A; IT1020013B

Abstract

A roller rewind machine having at least one moveable winding shaft for receiving a plurality of winding rollers and contact rollers disposed on a carrier axis and coupled to each winding roller including a plurality of prestressed eccentric rings mounted in circumferential direction on the carrier axes which is pivotably supported in a receiving means of the machine. The outer surfaces of the eccentric rings pivotably support the contact rollers in a freely rotatable manner. Springs are used to prestress each eccentric ring. The tension and thus the feed pressure of the contact rollers can be adjusted against the winding rollers while the machine is operating.

Description

United States Patent [1 1 Kampf et al.

[ Oct. 28, 1975 REWIND MACHINE [73] Assignee: Firma Erwin Kampf Maschinenfabrik, Wiehl, Germany 22 Filed: Aug. 19, 1974 21 Appl. No.: 498,351

[58] Field of Search 242/56.2, 56.4, 56.5, 56.9, 242/65, 66, 34

[5 6] References Cited UNITED STATES PATENTS 5/1961 Rockstrom et al. 242/65 3,591,101 7/1971 Gallet et al. 242/56.2 3,702,687 11/1972 Hal] 3,712,554 l/l973 Lorenzini et al 242/56.2

Primary ExaminerLeonard D. Christian Attorney, Agent, or Firm-Allison C. Collard [5 7] ABSTRACT A roller rewind machine having at least one moveable winding shaft for receiving a plurality of winding rollers and contact rollers disposed on a carrier axis and coupled to each winding roller including a plurality of prestressed eccentric rings mounted in circumferential direction on the carrier axes which is pivotably supported in a receiving means of the machine. The outer surfaces of the eccentric rings pivotably support the contact rollers in a freely rotatable manner. Springs are used to prestress each eccentric ring. The tension and thus the feed pressure of the contact rollers can be adjusted against the winding rollers while the machine is operating.

7 Claims, 4 Drawing Figures US. Patent Oct. 28, 1975 Sheet 1 of3 3,915,404

FIG]

US. Patent Oct. 28, 1975 Sheet 2 of3 3,915,404

U.S. Patent Oct.28, 1975 Sheet30f3 3,915,404

FIGA

REWIND MACHINE This invention relates to a roller rewind machine having at least one moveable winding shaft for receiving a plurality of rewind rollers, as well as contact rollers for each rewind roller.

A roller rewinding machine of this type is used for winding longitudinal cut strips of web or foil material. In many cases, the roller rewinding machine is combined with a roller cutting machine. The cut strips of webs adjoining each other are alternately wound onto different winding shafts. Normally, the material is of a non-uniform caliber or thickness throughout the length and the width of the web so that some of the rewind rollers tend to have a larger diameter than other adjacent rollers when rwound on the same rewind shaft. To assure that the contact rollers may be pivoted independently from the others, and pressed against the rewind roller, individually mounted swing arms are provided for each contact roller. Such a construction of a roller rewinding machine is rather expensive, and requires a great deal of readjustment time if and when webs of different widths have to be cut and rewound.

It is therefore an object of the present invention'to provide a roller rewind machine comprising at least one moveable rewind shaft for receiving a plurality of rewind rollers, and a carrier axis mounted in the receiving means of the machine frame and bearing a plurality of contact rollers each in contact with one rewind roller. Each contact roller is supported in a freely rotatable manner on the outer surface of an eccentric ring. An eccentric inner surface of each eccentric ring is mounted in a rotatable manner on the carrier axis and each eccentric ring is prestressed in the circumferential direction of the carrier axis. The prestressed eccentric rings assure that each individual contact roller is moveable radially with respect to the winding shaft, and independently from the other contact rollers, so that each contact roller automatically engages its associated rewind roller. The contact pressure of the contact roller remains substantially constant, because the displacement of the eccentric rings require only a slight change in the pressure of the contact roller against the rewind roller.

In accordance with the invention, a helical bending spring prestresses each individual eccentric ring with respect to the jacket of the carrier axis. Thereby each contact roller is individually pressed against its associated rewind roller. To assure that each contact roller may be easily adjusted in an axial direction, it is preferable that each eccentric ring be mounted on a carrier ring which is adjustably displaceable on the carrier axis, and which may be clamped at the desired place so that this carrier ring is rotatable and that a tension spring is mounted between the carrier ring and the eccentric ring. In order to adjust the pre-tension for the eccentric rings, the jacket of the carrier axis is rotatably and adjustably mounted in the receiving means of the machine frame.

In order to permit a fast readjustment of this pretension, even during the operation of the machine, the invention provides a worm gear carried in the jacket of the carrier axis, and engaged by a worm which in turn is adjusted by an adjustment shaft. Finally, the invention provides an abutment rod between the receiving means parallel with respect to the center line of the carrier axis, so as to limit the pivotal movement of the eccentric rings to a desired angular range. The eccentric rings are provided with a curved slot which runs concentrically with respect to the inner surface of the eccentric rings, and beyond the abutment rod.

Other objects and features of the present invention will become apparent from the following detailed description when taken in connection with the accompanying drawings which disclose several embodiments of the invention. It is to be understood that the drawings are designed for the purposes of illustration only, and are not intended as a definition of the limits and scope of the invention disclosed.

In the drawings wherein similar reference numerals denote similar elements throughout the several views:

FIG. 1 is a plan view of a roll cutter and winding machine;

FIG. 2 is a view shows a cross section of the machine of FIG. 1;

FIG. 3 is an enlarged cross-sectional view of the carrier axis and the feed roll; and

FIG. 4 is a cross-sectional view along line IV-IV of FIG. 3.

Referring to FIGS. 1 and 2, two guide paths 2 for carriers 3 for two rewind shafts 4 are mounted in a machine frame I. Adjustment spindles 5 which are driven by a motor 6, move carriers 3. Receiving means 7 are mounted on bearing plates 41 to receive carrier axis 8, on which a plurality of contact rollers 9 are rotatably mounted. The machine contains a cutting shaft 10 and a counter cutting shaft 11. Furthermore, a plurality of guide and return rollers 12 are provided for the web 13 or the cut strips 14, which have to be wound onto rewind rollers 16. A guide roller 15 is associated with each contact roller 9 in such a manner that the strip of material in the range of the contact line moves substantially tangential with respect to rewind roller 16. Thereby the contact roller 9 is relieved from the pull tension of the strip of material, and works exclusively as the contact roller for the strip of material and not as a return' roller. A drive motor 17 drives the cutting device and transport rollers by any suitable means such as for example, drive belts or the like. A motor 18 is associated with each of the winding shafts 4.

FIGS. 3 and 4 show in an enlarged scale, carn'er axis 8 together with contact rollers 9. A clamping rod 19 is retained in the receiving means 7, so that the end portion of carrier axis 8 is secured on clamping rod 19. A tubular jacket 20 of the carrier axis is rotatably mounted on clamping rods 19 and mounted in glide or roller bearings. A worm wheel 21 is mounted on one end of jacket 20, so that worm wheel 21 engages a worm gear 22 which is mounted on an adjustment shaft 23 (FIG. 1). This adjustment shaft is connected with an adjustment wheel 42 which is mounted at the front surface of machine frame 1. A wedge groove 25 runs along the axis length of jacket 20. A carrier ring 26 engages wedge groove 25 with a wedge 27, and may be clamped into the wedge groove by a clamp screw. An eccentric ring 29 is rotatably mounted on carrier ring 26, so that the inner surface 30 of the eccentric ring runs concentrically with respect to the center line 31 of carrier axis 8. The center line 33 of the outer surface 32 is offset with respect to center line 31 of inner surface 30, as can be seen from FIGS. 3 and 4. A helical spring 34 is tensioned between a shoulder 35 of carrier ring 26 and in a passage 36 of eccentric ring 29, so that a tension in circumferential direction may be obtained. The

FIG. 4 shows schematically the circumferential curve 39 of rewind roller 16. Carrier axis 8 may receive a plurality of contact rollers 9, corresponding to the number of rewind rollers 16 mounted on rewind shaft 4. The contact rollers, as already mentioned, are adjustable in axial direction, so that they may be rapidly and precisely adjusted to the respective rewind roller. This means a relatively short readjustment time for the machine.

The pretension and the feeding pressure of the contact rollers is adjusted by turning jacket 20 by means of worm gear 22. In the position shown in FIGS. 3 and 4, jacket 20 together with carrier ring 26 are turned in the direction of arrow 40, so as to increase the contact pressure. The pivotal movement of the eccentric rings 29 is limited by curved slot 37, so that the eccentric rings cannot accidentally turn over.

By means of adjustment wheel 42, the associated jacket 20 of carrier axis 8 is adjusted so that the tension springs 34 create the desired contact pressure. All contact rollers bear with the same contact pressure against the associated rewind rollers 16. Each individual contact roller can swing independently due to the associated eccentric ring 29. The circumferential line 39 is scanned by a light barrier (not shown). As a result of this, signal motor 6, for adjustment spindles is controlled, so that carriers 3 are moved accordingly.

While only a few embodiments of the present invention have been shown and described, it will be obvious to those skilled in the art that many changes and modifications may be made thereunto without departing from the spirit and scope of the invention.

What is claimed is: A

1. A roller rewind machine comprising a machine frame bearing at least one moveable rewind shaft for receiving a plurality of rewind rollers and further bearing a receiving means carrying a carrier axis, a plurality of eccentric rings each supporting a contact roller in contact with one rewind roller, an eccentric inner surface of each eccentric ring being mounted in a rotatable manner on said carrier axis and each eccentric ring being prestressed in circumferential direction of said carrier axis.

2. The roller rewind machine according to claim 1 comprising a bending spring prestressing each eccentric ring with respect to the carrier axis.

3. The roller rewind machine according to claim 2 comprising a carrier ring for rotatably mounting each eccentric ring, said carrier ring being adjustably displaceable on the carrier axis in an axial direction, and said bending spring being mounted between said carrier ring and said eccentric ring.

4. The roller rewinding machine according to claim 3 wherein the carrienaxis includes a tubular jacket rotatably and adjustably mounted in the receiving means of the machine frame and supporting said carrier ring.

5. The roller rewinding machine according to claim 4 wherein said tubular jacket includes a worm wheel disposed on its circumference, a worm gear engaging the worm wheel, and an adjustment shaft for actuating the worm gear.

6. The roller rewinding machine according to claim 5 comprising an abutment rod disposed between the receiving means of the machine frame parallel with respect to the carrier axis for limiting the pivotal movement of said eccentric rings to a desired angle or setting, said eccentric rings being provided with a curved slot disposed concentrically with respect to the inner surface of the eccentric rings and receiving the abutment rod.

7. The rewinding machine according to claim 1 comprising a guide roller is associated with each of the contact rollers so that a strip of material in the range of the contact line moves substantially tangential with respect to the winding rollers.

Claims

4. The roller rewinding machine according to claim 3 wherein the carrier axis includes a tubular jacket rotatably and adjustably mounted in the receiving means of the machine frame and supporting said carrier ring.