Winding device for winding a web-shaped material and method for changing a reel in a winding device

Abstract

A winding device for winding a web-shaped material, preferably a plastic film, has a reel for receiving the web-shaped material, a contact roller for feeding and pressing the web-shaped material against the reel, a device for rotationally driving a still empty reel, and a device for feeding the still empty reel to the contact roller. The device for rotationally driving the still empty reel and the device for feeding the still empty reel to the contact roller can act simultaneously on the still empty reel.

Claims

1. A winding device for winding a web-shaped material, said winding device comprising: a reel for receiving the web-shaped material; a contact roller for feeding and pressing the web-shaped material against the reel; a device for rotationally driving the reel while empty; and a device for delivering the reel while empty to the contact roller, the device for rotationally driving the empty reel and the device for delivering the empty reel to the contact roller being configured to act simultaneously on the empty reel, with the rotational speed of the empty reel being controlled such that a circumferential speed thereof is equal to the circumferential speed of the contact roller as the empty reel is delivered, and with the rotational driving being terminated before the delivered empty reel contacts at least one of the contact roller and the web-shaped to be wound.

2. The winding device, as claimed in claim 1, wherein the device for rotationally driving the empty reel includes a power transmission device that acts on a gearwheel, which is arranged on a reel shaft of the reel.

3. The winding device, as claimed in claim 2, wherein the power transmission device includes at least one of a sprocket chain and a toothed belt that cooperates with the gearwheel.

4. The winding device, as claimed in claim 2, wherein the device for rotationally driving the empty reel includes a retaining element, which is movable, relative to a machine frame of the winding device.

5. The winding device, as claimed in claim 4, wherein the power transmission device is arranged on the retaining element.

6. The winding device, as claimed in claim 3, wherein the retaining element is movable by an actuator.

7. The winding device, as claimed in claim 6, wherein the actuator includes a pneumatic or hydraulic cylinder.

8. The winding device according to claim 4, wherein the movable retaining element is pivotable.

9. The winding device, as claimed in claim 1, wherein the device for rotationally driving the empty reel includes a power transmission device that is at least partially elongated in shape so as to extend parallel to a direction of travel of the device for delivering the empty reel to the contact roller.

10. The winding device, as claimed in claim 1, wherein the device for rotationally driving the empty reel includes a separate drive.

11. The winding device, as claimed in claim 1, further comprising a sensor with which a signal is communicated when the empty reel has reached or undershot a specified distance from the contact roller.

12. The winding device according to claim 1 , wherein the web-shaped material is a plastic film.

13. A method of changing a reel in a winding device for winding a web-shaped material, said method comprising the following steps: feeding the web-shaped material to a reel for receiving the web-shaped material, and pressing, with a contact roller, the web-shaped material against the reel; rotating the reel, while still empty, with a device for rotationally driving the reel; moving the empty reel in a direction of the contact roller with a device for delivering the empty reel to the contact roller, with the device for rotationally driving the empty reel and the device for delivering the empty reel to the contact roller acting simultaneously on the empty reel; controlling the rotational speed of the empty reel such that a circumferential speed thereof is equal to the circumferential speed of the contact roller as the empty reel is delivered; and terminating the rotational driving before the delivered empty reel contacts at least one of the contact roller and the web-shaped material to be wound.

14. The method according to claim 10, wherein the web-shaped material is a plastic film.

15. The method according to claim 10, further comprising a step of determining with a sensor when the empty reel has reached or undershot a specified distance from the contact roller, and issuing a signal from the sensor.

16. A winding device for winding a web-shaped material, said winding device comprising: a reel for receiving the web-shaped material, the reel including a reel shaft and a gearwheel associated therewith; a contact roller for feeding and pressing the web-shaped material against the reel; a device for rotationally driving the reel while empty, including a power transmission device having at least one of a sprocket chain and a toothed be that cooperate with the gearwheel so as to establish or to interrupt the rotational driving ; and a device for delivering the reel while empty to the contact roller, the device for rotationally driving the empty reel and the device for delivering the empty reel to the contact roller being configured to act simultaneously on the empty reel.

17. The winding device according to claim 16, wherein the device for rotationally driving the empty reel includes a retaining element, which is movable, relative to a machine frame of the winding device.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Additional exemplary embodiments of the invention will become apparent from the description of the subject matter and the claims.

(2) The individual figures show in:

(3) FIG. 1 in schematic form a side view of a winding device, according to the invention.

(4) FIG. 2 a winding device, as shown in FIG. 1, but in a still empty reel while being fed to the contact roller.

(5) FIG. 3 a winding device, as shown in FIG. 2, but with the reel already engaged and the device for rotationally driving swung away.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(6) Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.

(7) FIGS. 1 to 3 show in schematic form the same side view of a winding device 1 of the invention. This winding device comprises a machine frame 2 and a contact roller 3, which is mounted on the machine frame in such a way that it can be rotated in said machine fame; and said contact roller is rotated in the direction of rotation R. A web-shaped material 4 is fed over this contact roller 3 and then wound on a reel 5.

(8) A displacement device 6, which is used to feed a still empty reel 7 to the contact roller 3, can be moved, preferably linearly, relative to the machine frame and relative to the contact roller in a manner that is not shown in more detail. In FIG. 1 this displacement device 6 is in its home position. The reel 7 was supplied from a reel magazine (not shown) and is now resting on the support device 8.

(9) The reel 7 comprises a reel sleeve 9, for example, a paper sleeve, a pin 10 and a gearwheel 11 disposed on said pin.

(10) In FIG. 1 the gearwheel 11 is in engagement with the toothed belt 12 of the device 13 for rotationally driving the still empty reel. The toothed belt 12 is preferably a double toothed belt; that is, it comprises teeth on both sides.

(11) Furthermore, this device 13 comprises a retaining plate 14, which is fastened to the machine frame 2 in such a way that it can be pivoted about the bearing 15. Designed as a pivot drive is a reciprocating piston cylinder unit 17, comprising a cylinder 18, which is hinged to the machine frame 2 by means of the pivot bearing 20, and a piston 19, which is hinged to the retaining plate 14 by means of the pivot bearing 21.

(12) Arranged on the retaining plate 14 are at least the gearwheels 22 and 23, which are arranged and/or dimensioned in such a way that the toothed belt 12 runs, as already described above, parallel to the displacement device 6. Additional gearwheels and pulleys may be provided. The toothed belt 12 is driven by an electric motor 24, which acts preferably by way of a driving gearwheel on the toothed belt 12 in a manner that is not shown. The electric motor 24 is mounted on the retaining plate 14.

(13) FIG. 2 shows the same view as in FIG. 1, but the displacement device 6 has already been advanced a little towards the contact roller 3. This FIG. 2 does not show all of the reference numerals, since all of the components match more or less the components shown in the drawing in FIG. 1. However, this figure shows a sensor 25 that is used to determine whether the still empty reel 7 has already reached or dropped below a specified minimum distance from the contact roller 3.

(14) FIG. 3 shows once again all of the components that have already been explained in conjunction with FIG. 1. However, in this figure the reel 7 is already in contact with the contact roller 3, so that the reel change has just been completed or can be done. The retaining plate 14 with all of its attachments has already been swung away, so that the device 13 no longer acts on the reel 7. The now finished reel 5 was moved or will be moved in the direction A and, in so doing, moved away from the contact roller 3. This reel 5 can now be removed.

(15) The invention being thus described, it will be apparent that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be recognized by one skilled in the art are intended to be included within the scope of the following claims.

(16) TABLE-US-00001 List of Reference Numerals and Characters 1 winding device 2 machine frame 3 contact roller 4 web-shaped material 5 reel 6 displacement device 7 empty reel 8 support device 9 reel sleeve 10 pin 11 gearwheel 12 toothed belt 13 device for rotationally driving 14 retaining plate 15 bearing 16 17 piston cylinder unit 18 cylinder 19 piston 20 pivot bearing 21 pivot bearing 22 gearwheel 23 gearwheel 24 electric motor 25 sensor R direction of rotation of the contact roller 3 A direction of removal of the finished reel 5