YARN TRAVERSING DEVICE FOR A SPOOLING DEVICE OF A TEXTILE MACHINE PRODUCING CROSS-WOUND BOBBINS

Abstract

A yarn traversing device (11) for a spooling device (4) of a textile machine producing cross-wound bobbins (1) comprises a yarn guide (25), which is connected by an endless tensioning means designed as a toothed belt (30) to a single drive (34), wherein the toothed belt (30) rotates in a largely closed housing (23) of the yarn traversing device (11) and is guided by guide wheels (31 or 32) arranged laterally next to a traversing area (B) and a drive wheel (41) connected to the electric motor single drive (34). The guide wheels (31 or 32) each have a smooth running surface (33), which is largely resistant to dirt, over which the toothed belt (30) runs with its toothing (38).

Claims

1. Yarn traversing device (11) for a spooling device (4) of a textile machine producing cross-wound bobbins (1) comprising a yarn guide (25), which is connected by an endless tensioning means designed as a toothed belt (30) to a single drive (34), wherein the toothed belt (30) rotates in a largely closed housing (23) of the yarn traversing device (11) and is guided by guide wheels (31 or 32) arranged laterally next to a traversing area (B) and a drive wheel (41) connected to the electric motor single drive (34) and wherein a drive wheel (41) connected to the electric motor drive (34) comprises a toothing (44), which corresponds with the toothing (38) of the toothed belt (30), characterized in that the toothed belt (30) is guided with its toothing (38) over guide wheels (31 or 32), which each have a smooth running surface (33).

2. Yarn traversing device (11) according to claim 1, characterized in that the smooth running surface (33) of the guide wheels (31 or 32) is bordered respectively by an upper (39) and a lower (43) guiding ring.

3. Yarn traversing device (11) according to claim 1, characterized in that the toothed belt (30) is made from a highly elastic, wear-resistant material.

4. Yarn traversing device (11) according to claim 1, characterized in that the electric motor drive (34) is designed as a stepping motor driven in a defined manner and is connected by a control line (36) to a control computer (35).

5. Yarn traversing device (11) according to claim 1, characterized in that the yarn traversing device (11) is designed as a compact, modular component in the form of a yarn guiding unit (22), which is completely replaceable if necessary.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The invention is a explained in more detail in the following with reference to an example embodiment illustrated in the drawings, wherein:

[0040] FIG. 1 shows in side view a workstation of a textile machine producing cross-wound bobbins comprising a yarn traversing device according to the invention in the region of the spooling device,

[0041] FIG. 2 shows in a perspective front view and on a larger scale a yarn traversing device according to the invention in a closed state,

[0042] FIG. 3 shows in a perspective rear view the yarn traversing device according to the invention without an upper cover,

[0043] FIG. 4 shows a perspective view of a pulley.

DETAILED DESCRIPTION OF THE INVENTION

[0044] FIG. 1 shows half of a textile machine producing cross-wound bobbins, in the present example embodiment an open-end-rotor spinning machine 1.

[0045] This type of already known open-end-rotor spinning machines 1 comprises a plurality of generally identical workstations 2 which are arranged in a row next to one another.

[0046] The workstations 2 are equipped respectively with an open-end rotor spinning device 3 and a spooling device 4.

[0047] In the open-end rotor spinning device 3, as already known, a sliver 6 stored in a spinning can 5 is spun into a yarn 7, which is then wound on the spooling device 4 into a cross-wound bobbin 8.

[0048] As indicated in FIG. 1 the spooling devices 4 each have for this purpose a coil former 9 for rotatably holding the cross-wound bobbins 8, a winding drum 10 for the rotary, frictional drive of the cross-wound bobbins 8 and a yarn traversing device 11.

[0049] In the shown example embodiment the winding drum 10 is connected to an electric motor single drive 21.

[0050] Such open-end rotor spinning machines 1 are generally also equipped with a cross-wound bobbin transport device 12 for disposing of the cross-wound bobbins 8 produced on the workstations 2.

[0051] On the open-end rotor spinning machine 1 there is also often a service unit 16, for example a cross-wound bobbin changer or a yarn-joining car, for example moving on guide rails 13, 14 and a support rail 15, the drive 17 of which comprises rollers 18 or a support wheel 19. The supply of electric power to the service unit 16 is performed for example by a drag chain or, as indicated in the example embodiment, a sliding contact device 20.

[0052] Such service units 16 can be driven, as already known, along the workstations 2 of the open-end spinning machine 1 and engage automatically if there is a need for action at one of the workstations 2.

[0053] Such a need for action is for example if at one of the workstations a cross-wound bobbin 8 has reached its prescribed diameter and needs to be replaced by a new empty tube, or if a yarn break has occurred at one of the workstations 2 and the workstation 2 has to be repieced.

[0054] FIG. 2 shows a perspective front view of one of the yarn traversing devices 11 designed according to the invention and installed in the region of the spooling devices 4 of the workstations 2.

[0055] Said yarn traversing devices 11, as shown, are designed respectively as a compact, closed yarn guiding unit 22. This means that the yarn traversing devices 11 each have a closed housing 23, in the inner chamber 37 of which a toothed belt gear 27 for a yarn guide 25 is installed.

[0056] The inner chamber 37 of the housing 23 of the yarn traversing device 11, which is delimited by a rear wall and side walls 28, 29 and is covered by a cover element 24, is protected on its front side by an endless tensioning means 30 against the penetration of textile dust and airborne fiber.

[0057] As shown, the yarn guide 25, which is made as usual from an abrasion-resistant material, preferably an oxide ceramic, is secured onto a guiding shoe 26, which is secured in turn to the outside 40 of an endless tensioning means, preferably a toothed belt 30.

[0058] The toothed belt 30 is connected to an electric motor, reversible drive 34, which is connected by a control line 36 to a control computer 36.

[0059] By means of a corresponding drive of the electric motor reversible drive 34, preferably a stepping motor, the control computer 36 ensures that the yarn guide 25 traverses during, the winding operation in a traversing area B, which is adjustable in a defined manner, and thereby ensures that the yarn 7 is wound evenly in crossing layers onto the cross-wound bobbin 8.

[0060] Guide wheels 31, 32 of a toothed belt gear 27, designed according to the invention, are arranged at the side next to the traversing area B of the yarn guide 25, as will be explained in the following with reference to FIG. 3.

[0061] FIG. 3 shows the yarn traversing device 11 from FIG. 2 and designed as a compact yarn guiding unit 22 in a perspective rear view and without the cover element 24. This means that FIG. 3 shows a view of the inner chamber 37 of the yarn traversing device 11, in which the toothed belt gear 27 for the yarn guide 25 is arranged.

[0062] As shown, the toothed belt 30 is guided in the shown example embodiment by two guide wheels 31, 32 designed according to the invention and a drive wheel 41.

[0063] This means that the toothed belt 30 runs over two guide wheels 31, 32 arranged laterally next to the traversing area B of the yarn guide 25, which are each provided with a smooth running surface 33 and an upper 39 and a lower 43 guiding ring and a drive wheel 41 provided with a toothing, which is arranged in a rotationally secure manner on the motor shaft 42 of an electric motor, reversible drive, preferably a stepping motor 34.

[0064] The stepping motor 34 is here connected via control line 36 to a control computer 35, for example a central computer of the textile machine, and can be controlled by the latter in a defined manner.

[0065] In an alternative embodiment of course also a section computer or a separate workstation computer can be used as a control computer 35.

[0066] FIG. 4 shows one of the guide wheels 31 or 32 in detail.

[0067] A shown, the guide wheel 31 (32) comprises in is middle section a smooth running surface 33, which is largely resistant to dirt or during the spooling process is continually cleaned by the rapid movement of the overlying endless tensioning means 30, in particular by means of its toothing 38. In addition, the running surface can be designed to repel dirt by means of a surface treatment or coating.

[0068] Above and below the running surface guiding rings 39 or 43 are arranged, which prevent the endless tensioning means 30 from sliding off the guide wheel 31 (32) and running onto adjacent components of the yarn guiding unit 22.

[0069] The guide wheel 31(32) can also be secured via an axis 45 to the housing 23 of the yarn traversing device 11 and has a (not shown) bearing device arranged inside the guide wheel.

[0070] The bearing device can be designed for example as a rolling bearing or as a plain bearing device.

[0071] It will therefore be readily understood by those persons skilled in the art that the present invention is susceptible of a broad utility and application. Many embodiments and adaptations of the present invention other than those herein described, as well as many variations, modifications and equivalent arrangements will be apparent from or reasonably suggested by the present invention and the foregoing description thereof, without departing from the substance or scope of the present invention. Accordingly, while the present invention has been described herein in detail in relation to its preferred embodiment, it is to be understood that this disclosure is only illustrative and exemplary of the present invention and is made merely for purposes of providing a full and enabling disclosure of the invention. The foregoing disclosure is not intended or to be construed to limit the present invention or otherwise to exclude any such other embodiment, adaptations, variations, modifications and equivalent arrangements, the present invention being limited only by the claims appended hereto and the equivalents thereof.