Drawing Frame for Drawing a Strand-Like Fiber Assembly and Textile Machine Equipped Therewith

Abstract

A drawing frame for a textile machine includes at least two drawing frame modules, with module having a roller and an opposite counter-roller supported on an individual carrier, wherein the roller is movable back and forth independently of the rollers of the other drawing frame modules between a load position and a release position. For each drawing frame module, the roller bodies of the roller and of the counter-roller are out of contact in the release position and are pressed together in the load position in order to guide the fiber assembly in a clamping manner. Each carrier includes a first carrier section and a separate second carrier section, wherein the roller is supported on the first carrier section and the counter-roller is supported on the second carrier section. A guide is configured between the first carrier section and the second carrier section so that the first carrier section and the second carrier section are displaceable relative to each other.

Claims

1-14: (canceled)

15. A drawing frame for a textile machine for drawing a strand-like fiber assembly fed to the drawing frame, comprising: at least two drawing frame modules successively arranged in a transport direction of the fiber assembly, each drawing frame module comprising a roller and an opposite counter-roller; each of the roller and the counter-roller comprising a roller body rotatable about a rotary axle; each drawing frame module comprising an individual carrier on which the roller and the counter-roller are supported; for each drawing frame module, the roller supported on the carrier via a receptacle such that the roller is movable back and forth independently of the rollers of the other drawing frame modules between a load position and a release position; for each drawing frame module, the roller body of the roller and of the counter-roller are out of contact in the release position and are pressed against one another in the load position in order to guide the fiber assembly in a clamping manner; each carrier comprising a first carrier section and a separate second carrier section, wherein the roller is supported on the first carrier section and the counter-roller is supported on the second carrier section; a guide configured between the first carrier section and the second carrier section so that the first carrier section and the second carrier section are displaceable relative to each other.

16. The drawing frame as set forth in claim 15, further comprising a guide rail on which the carriers are fixed via a fixing arrangement, the carriers movable along the guide rail in a released position of the fixing arrangement.

17. The drawing frame as set forth in claim 16, wherein the carriers are fixed on the guide rail in a form-fitting manner.

18. The drawing frame as set forth in claim 15, wherein in at least two of the drawing frame modules have a same construction.

19. The drawing frame as set forth in claim 15, wherein the rotary axles of the roller and the counter roller are supported on a single end on the carrier.

20. The drawing frame as set forth in claim 15, wherein the first carrier section and the second carrier section are fixed relative to each other via a fixing element.

21. The drawing frame as set forth in claim 20, wherein the fixing element is movable between a fixing position wherein the first carrier section and the second carrier section are fixed relative to each other, and a release position wherein the first carrier section and the second carrier section are displaceable relative to each other.

22. The drawing frame as set forth in claim 15, wherein the first carrier section and the second carrier section are in contact both in the load position and in the release position of the roller.

23. The drawing frame as set forth in claim 15, further comprising a loading element configured with the roller to apply a defined load force in the load position of the roller.

24. The drawing frame as set forth in claim 23, wherein the receptacle comprises a swivel lever.

25. A textile machine, comprising the drawing frame as set forth in claim 15.

26. The textile machine as set forth in claim 25, wherein the drawing frame modules are operatively connected to the guide rail as a unit that is removable as a whole from the textile machine.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Additional advantages of the invention are described in the following exemplary embodiments. A brief description of the schematic drawing is provided below:

[0038] FIG. 1 shows a side view of a known textile machine,

[0039] FIG. 2a shows a side view of a known drawing frame in its load position,

[0040] FIG. 2b shows the drawing frame shown in FIG. 2a in its release position,

[0041] FIG. 3 shows a side view of a drawing frame according to the invention,

[0042] FIG. 4a shows a side view of a drawing frame module of a drawing frame according to the invention,

[0043] FIG. 4b shows a front view of a drawing frame module of a drawing frame according to the invention that is secured to the guide rail shown in FIG. 3, and

[0044] FIG. 5 shows a perspective of a drawing frame module of a drawing frame according to the invention.

DETAILED DESCRIPTION

[0045] 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.

[0046] FIG. 1 shows a schematic view of a portion of a textile machine in the form of an air jet spinning machine. The air jet spinning machine comprises a drawing frame 4 with a plurality of drawing frame rollers, each of which can be rotated about a rotary axle 14 (only one is denoted with a reference symbol) with the aid of a drive (not shown), with a respective roller 1 cooperating with a corresponding counter-roller 2 and thus guiding, in a clamping manner, a fiber assembly 9 that is fed to the drawing frame 4.

[0047] Furthermore, the illustrated air jet spinning machine includes one or more spinning nozzles 5 arranged adjacent to one another, each with an internal swirl chamber in which the fiber assembly 9 or at least a portion of the fibers of the fiber assembly 9 is caused to rotate.

[0048] Moreover, the air jet spinning machine can include a take-off device with a plurality of cooperating delivery rollers 21 and a winder that is arranged downstream from the delivery rollers 21 with the aid of which the roving 8 leaving the spinning nozzle 5 through an outlet can be wound onto a tube 7 in order to form a package, in which case a traversing unit 6 and an electric motor 22 serving to drive the tube 7 can be used.

[0049] In general, it should be clarified in this context that the roving 8 is a yarn with a relatively low proportion of wrap fibers or a yarn in which the wrap fibers are entwined relatively loosely around the inner core, whereby the roving 8 remains drawable. This is crucial, since the roving 8 produced must be drawn again on a subsequent textile machine (e.g., a ring spinning machine) with the aid of a drawing frame 4 in order to be further processed into a conventional yarn that can be processed into a fabric on a loom, for example. Alternatively, the air jet spinning machine can also be designed for the production of conventional yarn, in which case the drawing frame 4 according to the invention can also be used in other textile machines, such as a ring spinning machine, for example.

[0050] FIG. 2a shows a known drawing frame 4 in the load position, in which the rollers 1 are pressed against the counter-rollers 2 with a defined contact pressure. As can be seen from this figure, all of the rollers 1 are supported on the same support arm 20, which is swivel-mounted on a base carrier 23 on which, in turn, the counter-rollers 2 are supported. By swiveling the support arm 20, the rollers 1 can finally be relieved of pressure and lifted off of the counter rollers 2 (FIG. 2b).

[0051] In contrast to this known prior art, the drawing frame 4 according to the invention is now characterized in that it comprises a plurality of independent drawing frame modules 26. A drawing frame 4 with three such drawing frame modules 26 is shown in FIG. 3.

[0052] As can be seen from this figure, each drawing frame module 26 has a carrier 10 on which both the roller 1 and the counter-roller 2 of the corresponding drawing frame module 26 are supported. In particular, the carrier 10 includes for this purpose a displaceably supported receptacle 11 for supporting the roller 1 and/or its rotary axle 14, so that the roller 1 can be moved relative to the counter roller 2.

[0053] While the rollers 1 of the two drawing frame modules 26 to the left in FIG. 3 are in their load position, in which the roller body 3 of the rollers 1 are pressed by means of a respective loading element 19 against the counter rollers 2 of the respective drawing frame module 26, the roller 1 of the drawing frame module 26 to the right is in its release position. The loading element 19 is thereby relieved of pressure, so that it no longer exerts any force on the receptacle 11 of the roller 1. In this case, independently of the rollers 1 of the other drawing frame modules 26, the roller 1 can be brought into a position in which it no longer touches the counter-roller 2 of the corresponding drawing frame module 26.

[0054] FIG. 4a shows a drawing frame module 26 from the side that is not visible in FIG. 3 (FIG. 3 thus shows the right side of the drawing frame 4, whereas FIG. 4a shows the left side of a drawing frame module 26; right and left refer here to the predefined transport direction of the fiber assembly 9 in the drawing frame 4).

[0055] FIG. 4b shows a view of a drawing frame module 26 from the front (i.e., from the right with respect to FIG. 3).

[0056] Besides the closed flow of force within a drawing frame module 26, a key advantage of the drawing frame 4 according to the invention lies in the ability to adjust the position of the individual drawing frame modules 26 relative to the other drawing frame modules 26 as needed.

[0057] For this purpose, the drawing frame 4 preferably includes the guide rail 12 shown in FIGS. 3 and 4b, to which individual, preferably all, drawing frame modules 26 are fastened. The guide rail 12 preferably includes one or more recesses 25 or elevations in the form of rail elements 24 that cooperate with corresponding elevations or recesses 25 of the carriers 10 of the drawing frame modules 26, preferably in a form-fitting manner. While the shape of the rail elements 24 or the recesses 25 corresponding therewith in FIG. 4b is selected such that it is not possible to lift the carrier 10 off the guide rail 12, it is also conceivable to allow lifting, for example, in which the elevations and recesses 25 have a rectangular cross-section (see the left rail element 24 and the corresponding recess 25 shown in FIG. 4b; FIG. 4b shows two different shapes of said elements; as will readily be understood, all of the rail elements 24 and the corresponding recesses 25 can have the same cross-sectional shape).

[0058] In any case, there should be one or more fixing arrangements 13 with the aid of which the drawing frame modules 26 can be fixed in place after being displaced along the guide rail(s) 12 or the elevations at the predetermined location relative to the guide rail 12. In the example shown in FIG. 4b, a screw is used for this purpose that engages in a thread of the guide rail 12 and presses against the carrier 10 from below.

[0059] An especially advantageous development of the invention is shown in FIG. 5 (drawing frame module 26 in perspective). As can be seen from this figure (which, incidentally, makes it easier to recognize the receptacle 11 of the roller 1 that is embodied as a swivel lever and shown in FIGS. 3 and 4), the carrier 10 is preferably divided into two separate components, namely a first carrier section 15 and a second carrier section 16.

[0060] Furthermore, the first carrier section 15 has a recess 25 in which a guide 17 of the second carrier section 16 engages, so that the first carrier section 15 can be displaced relative to the second carrier section 16, which is preferably attached to the aforementioned guide rail 12, when a corresponding fixing element 18 (e.g., a screw) is loosened. Once in the desired position, the fixing element or elements 18 can finally be transferred to the fixing position, thereby fixing the relative position between the first carrier section 15 and the second carrier section 16 and thus the relative position between the roller 1 and counter-roller 2 of the corresponding drawing frame module 26. The guide 17 can also have the dovetail shape shown in FIG. 5 or also a shape that allows lifting of the first carrier section 15 from the second carrier section 16. The guide 17 as well as the recess 25 could thus also have a rectangular or square cross-sectional shape (with it being readily understood that other shapes without an undercut are also conceivable).

[0061] As a result, a drawing frame 4 is proposed in which the individual drawing frame modules 26 and the individual carrier sections 15, 16 of the respective drawing frame modules 26 can be adjusted individually with regard to their position. In particular, it is possible to remove the guide rail 12 with the drawing frame module 26 from the textile machine and make the desired adjustments outside the textile machine.

[0062] The present invention is not limited to the exemplary embodiments that have been illustrated and described. Variations within the scope of the claims are also possible, as is any combination of the features described, even if they are shown and described in different parts of the description or claims or in different embodiments.

LIST OF REFERENCE SYMBOLS

[0063] 1 roller [0064] 2 counter-roller [0065] 3 roller body [0066] 4 drawing frame [0067] 5 spinning nozzle [0068] 6 traversing unit [0069] 7 tube [0070] 8 roving [0071] 9 fiber assembly [0072] 10 carrier [0073] 11 receptacle [0074] 12 guide rail [0075] 13 fixing arrangement [0076] 14 rotary axle [0077] 15 first carrier section [0078] 16 second carrier section [0079] 17 guide [0080] 18 fixing element [0081] 19 loading element [0082] 20 support arm [0083] 21 delivery roller [0084] 22 electric motor [0085] 23 base carrier [0086] 24 rail element [0087] 25 recess [0088] 26 drawing frame module