BOBBIN STRIPPING UNIT

Abstract

A bobbin stripping unit for removing yarn residues from a bobbin, the bobbin being substantially cylindrical with a longitudinal axis. The bobbin stripping unit includes a holding device which holds the bobbin in a substantially vertical or horizontal position with respect to its longitudinal axis, at least one suction nozzle extending over substantially the entire length of the bobbin for sucking in yarn residues, and a casing which can be transferred between a stripping configuration and a release configuration. In the stripping configuration, the casing substantially surrounds the bobbin, at least partially. In the release position, the casing exposes the bobbin for insertion and removal.

Claims

1. A bobbin stripping unit for removing yarn residues from a bobbin, wherein the bobbin is substantially cylindrical with a longitudinal axis, wherein the bobbin stripping unit comprises: a holding device which holds the bobbin in a substantially vertical or horizontal position with respect to its longitudinal axis; at least one suction nozzle extending over substantially the entire length of the bobbin for sucking in yarn residues; and a casing which can be transferred between a stripping configuration and a release configuration, wherein the casing in the stripping configuration surrounds the bobbin at least partially and in the release position exposes the bobbin for insertion and removal.

2. The bobbin stripping unit according to claim 1, wherein the casing is formed in a plurality of parts that are displaceable towards and away from the bobbin substantially along directions which are oriented substantially perpendicular to the longitudinal axis of the bobbin, which is held by the holding device, for transferring between the stripping configuration and the release configuration.

3. The bobbin stripping unit according to claim 1, wherein transferring the casing into the stripping configuration comprises slipping the casing over the bobbin.

4. The bobbin stripping unit according to claim 1, wherein the casing in the stripping configuration has at least one.

5. The bobbin stripping unit according to claim 4, wherein the at least one opening extends over substantially the entire length of the bobbin.

6. The bobbin stripping unit according to claim 1, wherein the casing is formed in two half shell parts which each cover an angular range of approximately 180°.

7. The bobbin stripping unit according to claim 1, wherein the casing comprises a plurality of parts that are displaceable towards and away from the bobbin substantially along directions which are oriented substantially perpendicular to the longitudinal axis of the bobbin; and wherein the at least one suction nozzle is assigned to one of the plurality of parts of the casing.

8. The bobbin stripping unit according to claim 1, wherein the at least one suction nozzle is assigned to a displacement device which is configured to displace the at least one suction nozzle substantially parallel to the longitudinal axis of the bobbin (S) which is held by the holding device.

9. The bobbin stripping unit according to claim 1, wherein the at least one suction nozzle has a narrowing in the flow direction of the suction.

10. The bobbin stripping unit according to claim 1, wherein the holding device is configured to rotate the bobbin about its longitudinal axis.

11. The bobbin stripping unit according to claim 1, wherein the at least one suction nozzle is provided with a rotation device which is configured to rotate the suction nozzle about the bobbin which is held by the holding device, wherein the rotation device rotates around a rotational axis that coincides substantially with the longitudinal axis of the bobbin.

12. A bobbin stripping arrangement, comprising: a plurality of bobbin stripping units, wherein each of the bobbin stripping units comprises: a holding device for holding a bobbin in a substantially vertical or horizontal position with respect to a longitudinal axis of the bobbin, a suction nozzle extending over substantially the entire length of the bobbin for sucking in yarn residues, and a casing which can be transferred between a stripping configuration and a release configuration, wherein the casing in the stripping configuration surrounds the bobbin at least partially and in the release position exposes the bobbin for insertion and removal; and a control device configured to operate the plurality of bobbin stripping units in a coordinated manner.

13. A method for operating a bobbin stripping unit, wherein the bobbin stripping unit comprises a holding device for holding a bobbin in a substantially vertical or horizontal position with respect to a longitudinal axis of the bobbin, at least one suction nozzle extending over substantially the entire length of the bobbin for sucking in yarn residues, and a casing which can be transferred between a stripping configuration and a release configuration, the method comprising the steps: providing the casing in the release position; when the casing is in the release position, transferring a bobbin held by the holding device to a designated working position; when the bobbin is arranged at the designated working position, transferring the casing to the stripping configuration, in which the casing substantially surrounds the bobbin; when the casing is in the stripping configuration, operating the at least one suction nozzle to suck in yarn residues located on the bobbin; upon completing operation of the at least one sucking nozzle, returning the casing to the release position; and when the casing is returned to the release position, removing the bobbin which is held by the holding device from the working position.

14. The bobbin stripping unit according to claim 1, wherein the casing in the stripping configuration substantially completely surrounds the bobbin.

15. The bobbin stripping unit according to claim 1, wherein the at least one opening is located between at least two adjacent parts of the plurality of parts of the casing.

16. The bobbin stripping unit according to claim 1, wherein the casing is formed in a plurality of parts that are displaceable substantially along directions which are oriented substantially perpendicular to the longitudinal axis of the bobbin for transferring between the stripping configuration and the release configuration; and wherein the at least one suction nozzle is assigned to one of the parts of the casing such that transferring the casing into the stripping configuration displaces the at least one suction nozzle to be substantially parallel to the longitudinal axis of the bobbin.

17. The bobbin stripping arrangement of claim 12, further comprising a vacuum device connected to the nozzle of each bobbin stripping unit; and wherein the control device is configured to operate the vacuum device to generate a vacuum necessary for sucking in the yarn residue through each nozzle in parallel.

Description

[0023] Further features and advantages of the present invention become apparent from the following description of two embodiments if they are considered together with the accompanying figures. These show in detail:

[0024] FIGS. 1a-1d a first embodiment of a bobbin stripping unit according to the present invention in four different views; and

[0025] FIGS. 2a and 2b a second embodiment of the present invention in two different views with minimal and complete encasement respectively.

[0026] In FIGS. 1a to 1d, a first embodiment of a bobbin stripping unit according to the invention is denoted in each case by the reference number 10. Here, FIGS. 1a and 1c show the stripping unit 10 in its release position in each case and FIGS. 1b and 1d show the stripping unit 10 in its stripping configuration in each case. In particular, FIGS. 1a and 1b present top views of the stripping unit 10, the viewing direction running along the longitudinal axis L of the bobbin S which may, for example, be arranged standing upright. FIGS. 1c and 1 d, on the other hand, show the bobbin stripping unit 10 and the bobbin S in a lateral view in each case.

[0027] As can be seen from FIGS. 1a to 1 d, the bobbin stripping unit comprises two half shells 12 and 14 which are spaced apart in the release configuration and are in contact with each other in sections in the stripping configuration and form a substantially circular overall cross-section which, as can be seen in FIG. 1b, is aligned substantially concentric with the longitudinal axis L of the bobbin S. It should be mentioned at this point that various other cross-sections of the casing are conceivable, for example polygonal, such as rectangular or square cross-sections, or even oval-shaped cross-sections.

[0028] As can also be seen in FIG. 1b, the first half shell 12 extends over a full 180°, while the second half shell 14 extends over a slightly smaller angular range such that an opening 16 also remains in the stripping configuration through which the air can flow into the interior of the casing. Again, it should be remembered that the angular range covered in each case by the two half shells could also differ from 180°, and in particular could be in the entire range from 90° to 270°.

[0029] On the other hand, the air flowing through this opening 16 is sucked away from the bobbin S by a suction nozzle 18, which is assigned to the first part 12 of the casing, and which also extends over the entire height of the bobbin S, any yarn residues remaining on the bobbin S being removed during this suction process. The vacuum required to operate the suction nozzle 18 is generated here by a vacuum source, not shown, which is connected to the nozzle 18 using suitable conducting means.

[0030] In the embodiment shown in FIGS. 1a to 1d, the bobbin S is held rotatably by the holding device such that it is rotated by said device about its longitudinal axis L, as a result of which the stripping action of the suction nozzle 18 can be exerted evenly over the entire circumference of the bobbin S.

[0031] In contrast, FIGS. 2a and 2b show an embodiment of a bobbin stripping unit which is denoted by the reference number 10′ and which comprises a nozzle 18′ rotating about the longitudinal axis L of the bobbin S, while the bobbin S itself is held non-rotationally. For reasons of clarity, FIGS. 2a and 2b do not show the two parts 12 and 14 of the casing; however, they are constructed and can be operated in the same way as those in FIGS. 1a to 1d.