Method and device for swiveling a bobbin in a winding device

Abstract

A winding device and associated method for swiveling a bobbin in the winding device during an interruption of a winding operation are provided, wherein the bobbin rests on a backing roller and is formed on a bobbin tube onto which a thread is wound. The bobbin tube is rotatably held between holders on two retaining arms mounted on a common swivel arm having a swivel axis. With force measurement unit, one of intrinsic weight of the bobbin or a force effect that acts on the retaining arms due to contact of the bobbin with the backing roller is measured. A manual force is transmitted into at least one of the retaining arms in a force direction that is determined by evaluating the force measurement unit. With a drive that is operably configured with the swivel arm, the swivel arm is swiveled in the force direction.

Claims

1. A method for swiveling a bobbin in a winding device during an interruption of a winding operation, wherein the bobbin rests on a backing roller and is formed on a bobbin tube onto which a thread is wound, the bobbin tube rotatably held between two retaining arms via a holder on each retaining arm, the two retaining arms mounted on a common swivel arm having a swivel axis, the method comprising: with a force measurement unit, measuring one of intrinsic weight of the bobbin or a force effect that acts on the retaining arms due to contact of the bobbin with the backing roller; manually transmitting a force into at least one of the retaining arms; determining a force direction of the manually transmitted force by evaluating the force measurement unit; and with a drive operably configured with the swivel arm, swiveling the swivel arm in the force direction.

2. The method according to claim 1, wherein the swiveling of the swivel arm with the drive is continued for as long as the manually transmitted force is continued.

3. The method according to claim 1, further comprising using a controller associated with the drive to automatically bring the bobbin back into an operating position against the backing roller with a swivel motion of the swivel arm counter to the force direction.

4. The method according to claim 3, wherein the winding operation is continued when the bobbin rests on the backing roller.

5. A winding device for winding a thread onto a bobbin tube, comprising: a swivel arm having a swivel axis; opposite retaining arms non-rotatably mounted on the swivel arm and extending parallel to each other from the swivel arm; each swivel arm comprising a rotatable holder for the bobbin tube at an end thereof opposite the swivel arm; a drive associated with the swivel arm to swivel the swivel arm bout the swivel axis; a force measurement unit disposed to measure a force that acts on the retaining arms; a force transmission location defined on at least one of the retaining arms, wherein a manual force is transmitted to the retaining arm in a force direction at the force transmission location; and a controller configured to determine a direction of movement of the swivel arm about the swivel axis based on the force direction of the manual transmission of force.

6. The winding device according to claim 5, wherein one of the retaining arms comprises a two-part design, the force measurement unit connected between the two parts of the retaining arm.

7. The winding device according to claim 6, wherein the force measurement unit comprises a bending beam load cell.

8. The winding device according to claim 6, wherein the force transmission location comprises an extension of the two-part retaining arm.

9. The winding device according to claim 5, wherein the drive comprises an electric motor.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further advantages of the invention are described in the following exemplary embodiments, as shown in the following figures:

(2) FIG. 1 shows a schematic top view of a first embodiment of a winding device;

(3) FIG. 2 shows a schematic side view of the winding device in direction X according to FIG. 1;

(4) FIG. 3 shows a schematic illustration of a second embodiment of a winding device; and

(5) FIG. 4 shows a schematic side view of the winding device in direction Y according to FIG. 3.

DETAILED DESCRIPTION

(6) Reference will now be made to embodiments of the invention, one or more examples of which are shown in the drawings. Each embodiment is provided by way of explanation of the invention, and not as a limitation of the invention. For example features illustrated or described as part of one embodiment can be combined with another embodiment to yield still another embodiment. It is intended that the present invention include these and other modifications and variations to the embodiments described herein.

(7) FIG. 1 shows a schematic top view, and FIG. 2 shows a schematic side view of a first embodiment of a winding device in direction X in FIG. 1. The winding device includes a bobbin frame 1 made up of a swivel arm 10 having a swivel axis 11, and a first retaining arm 6 and a second retaining arm 7. The retaining arms 6 and 7 are nonrotatably fastened at opposite ends of the swivel arm 10. A swivel motion 14 of the swivel arm 10 thus causes the retaining arms 6 and 7 together with the swivel arm to be swiveled about the swivel axis 11. A drive 13 is provided for the swivel motion 14 of the bobbin frame 1. In the design shown, the drive 13 is depicted as an electric motor. The swivel arm 10 is held in a machine frame 26 via corresponding stanchions 24. In addition, holders 8 and 9 for a bobbin tube 5 are rotatably mounted opposite from one another at the end of the respective retaining arms 6 and 7 opposite from the swivel arm 10 via a respective bearing bolt. The first holder 8 and the second holder 9 are situated in a shared bobbin axis 18. A bobbin tube 5 is clamped between the holders 8 and 9. One of the two holders 8 or 9, for example the holder 8, is held in the retaining arm 6 so that it is displaceable in the direction of the bobbin axis 18. In this way, a bobbin tube 5 may be inserted between the holders 8 and 9, and the holder 8 may subsequently be pressed against the holder 9, thus clamping the bobbin tube 5. In the embodiment shown, the holder 9 is connected to a drive wheel 19 in the bobbin axis 18. The drive wheel 19 is set in rotation by a drive element 20, for example a chain drive, which results in rotation of the bobbin tube 5 in the rotational direction 23 due to the connection to the holder 9.

(8) Situated in parallel to the bobbin axis 18 of the bobbin tube 5 is a backing roller 3 on which the bobbin tube 5 comes to rest due to the swivel motion 14 of the swivel arm 10 about the swivel axis 11. The backing roller 3 is rotatably fastened in the machine frame 26 via corresponding mountings 25. As a result of the rotation of the bobbin tube 5 in a corresponding rotational direction 23, a thread 4 that is laid on the bobbin tube 5 is wound onto the bobbin tube 5, and a bobbin 2 is formed. During this winding operation, a traverse unit 21 moves the thread 4 back and forth along the bobbin axis 18 of the bobbin tube 5. Various types of windings or bobbins 2 may be produced on the bobbin tube 5 by means of this movement direction 22 of the traverse unit 21. The bobbin 2 increases in diameter due to the formation of a winding on the bobbin tube 5, so that the contact with the backing roller 3 causes the bobbin frame 1 to be swiveled away from the backing roller 3 about the swivel axis 11. During the winding operation, the thread 4 is clamped between the bobbin tube 5, or the thread 4 that is already wound onto the bobbin tube 5, and the backing roller 3, resulting in a tight winding on the bobbin tube 5. A clamping force F hereby applied continuously increases during a winding operation due to the intrinsic weight of the bobbin 2, which becomes increasingly larger. To be able to ensure a constant clamping force F, the bobbin frame 1 is lifted from the backing roller 3 about the swivel axis 11 with a swivel motion 14, by the drive 13. However, this lifting is carried out only enough for a predetermined clamping force F to remain between the bobbin 2 and the backing roller 3. A bending moment results in the retaining arms 8 and 9 as a response to the clamping force F and the lifting of the bobbin frame 1 by the drive 13. The bending moment is measured by a force measurement unit 12, which may be provided in the fastening of the retaining arm 6 to the swivel arm 10.

(9) A defined location 17 for the manual transmission of force into the retaining arm 6 is provided on the retaining arm 6. The defined location 17 is designed as an extension of the retaining arm 6. The operator can now easily press against this extension (just a few 100 grams is sufficient) in order to apply a force G or H to the extension, depending on the intended movement direction. The force G is manually applied when the bobbin 2 is to be moved away from the backing roller 3, and the force H is manually applied when the bobbin 2 or the bobbin tube 5 is to be moved toward the backing roller 3. This transmission of force is determined by the force measurement unit, whereupon the controller, via the drive 13, moves the swivel arm 10, and thus the bobbin frame 1 and the bobbin 2, in the appropriate direction via a swivel motion 14.

(10) FIG. 3 shows a schematic top view and FIG. 4 shows a schematic side view of a first embodiment of a winding device in direction Y in FIG. 3. The design of the device, with the exception of the force measurement unit 12, is identical to FIGS. 1 and 2, for which reason reference is made to the discussion for FIGS. 1 and 2 for a detailed description. In the embodiment shown, the force measurement unit 12 is integrated into the retaining arm 6. The retaining arm 6 has a two-part design. A first part 15 of the retaining arm 6 connects the swivel arm 10 to the force measurement unit 12, and a second part 16 of the retaining arm 6 leads from the force measurement unit 12, via the bobbin axis 18, to the defined location 17 for the manual transmission of force. The two parts 15 and 16 of the retaining arm 6 are screwed to the force measurement unit 12, the force measurement unit 12 being designed as a bending beam load cell.

(11) The present invention is not limited to the represented and described exemplary embodiments. Modifications within the scope of the claims, as well as a combination of the features, even if they are represented and described in different exemplary embodiments, are an object of the invention.

LIST OF REFERENCE NUMERALS

(12) 1 bobbin frame 2 bobbin 3 backing roller 4 thread 5 bobbin tube 6 first retaining arm 7 second retaining arm 8 first holder 9 second holder 10 swivel arm 11 swivel axis 12 force measurement unit 13 drive 14 swivel motion 15 first part of the retaining arm 16 second part the retaining arm 17 defined location for the manual transmission of force 18 bobbin axis 19 drive wheel 20 drive element 21 traverse unit 22 movement direction of the traverse unit 23 rotational direction of the bobbin 24 stanchion 25 mounting for the backing roller 26 machine frame F clamping force G manual force directed away from the backing roller H manual force directed toward the backing roller