JP2019516872A - Drafting equipment for textile machinery - Google Patents

Abstract

The invention is a drafting device for a textile machine (2), the drafting device (1) comprising at least one roller (3) and at least one corresponding counter roller (4) The sliver (5) is nipped and guided between (3) and the opposing roller (4), and the roller (3) and the opposing roller (4) each have one roller body (6) The roller (3) and the opposing roller (4) each have one rotational axis (7), and the rotational axis (7) of the roller (3) and / or the rotation of the opposing roller (4) The shaft (7) is supported on only one side, and the roller (3) is at a rest position where the roller body (6) of the roller (3) and the roller body (6) of the opposing roller (4) do not contact The roller body (6) of the roller (3) and the roller body (6) of the opposing roller (4) The roller (3) is movably supported between the load position being crimped and the roller body (6) of the roller (3) and the counter roller (4) at the transition from the rest position to the load position. The drafting device is movable to an intermediate position where the roller body (6) is simply in contact. According to the invention, the roller body (6) of the roller (3) and the roller body (6) of the counter roller (4) have one common contact area (8), 8) is formed smaller in the axial direction of the axis of rotation (7) of the roller (3) than in the load position, the rotation axis (7) of the roller (3) and the counter roller (4) It is proposed that the axes of rotation (7) be oriented relative to one another at an intermediate position.

Description

  The present invention is a drafting device for a textile machine, the drafting device comprising at least one roller and at least one corresponding counter roller, the sliver being sandwiched between the roller and the counter roller It is possible that the roller and the counter roller each have one roller body, the roller and the counter roller each having one rotational axis, the rotational axis of the roller and / or the rotational axis of the counter roller The roller is supported on only one side, and the roller is in a stationary position where the roller body of the roller and the roller body of the opposite roller do not contact, and the load at which the roller body of the roller and the roller body of the opposite roller are crimped against each other Movably supported between the positions, the rollers are movable to an intermediate position at the transition from the rest position to the load position, in which position Simply in contact with the roller body over la roller body and the counter roller, to the drafting device.

  Drafting devices are known in the prior art and are used, for example, in ring or air spinning machines. In this case, the drafting device acts for drawing (another generic name: draft) and thus for the homogeneity of the sliver supplied to the spinning machine. Likewise, the drafting device is used in so-called spinning preparation machines, in particular in drawing machines, which are arranged in front of the corresponding spinning machine and likewise serve for the homogenization of the sliver. In principle, the drafting device described above comprises more than one roller device. Each of these roller devices has a corresponding roller and an opposing roller. The roller and the counter roller are finally driven at an increasing number of revolutions in the transport direction of the sliver passing through the drafting device, so that the sliver can be drafted.

  It is known to support the roller and the counter-roller via two rotary shafts, each projecting laterally on both sides, while at least one of the roller and / or the counter-roller is bearing on each side via the respective rotary shaft It is also already prior art to guide at. In this case, the rotary shaft can usually extend in line with the axis of rotation of the roller body of the corresponding roller or counter roller and can be supported, for example, in the support of the drafting device via ball bearings or roller bearings. .

  As is the case during operation of the drafting device, when the sliver is guided between the roller and its opposing roller in the loading position and guided, the drafting device is perpendicular to the axis of rotation of the roller body at each roller body. Apply a force that extends in the direction. However, this force is subject to the opposing force realized by the bearing of each rotary shaft. However, this opposing force decreases as the distance from the bearing of each rotary shaft increases. Furthermore, there is some bending elasticity of the rotating shaft as well as play that can not be excluded between the roller body and the rotating shaft and / or between the rotating shaft and the corresponding bearing.

  Thus, as a result, the nipping forces acting on the sliver at the loaded position due to the crimping between the roller and the opposing roller are not constant in the direction of the rotational axis of the roller and the opposing roller and decrease as the distance from the bearing increases Result in adverse effects on draft results.

  The subject of the invention is a drafting device which eliminates this drawback and applies to the sliver to be drafted a nip force formed by the roller and the counter-roller uniformly over its width (ie in the direction perpendicular to the transport direction). To provide.

  This problem is solved by a drafting device having the features of the independent claims.

  According to the invention, the drafting device is better with the following configuration. That is, the rotational axis of the roller and the rotational axis of the opposing roller are at an intermediate position (in this intermediate position, the roller body of the roller and the roller body of the opposing roller merely contact each other) It is oriented. That is, the roller body of the roller and the roller body of the opposing roller have one common contact area, and the contact area is the roller body of the roller and the opposing roller when viewed in the axial direction of the rotation axis of the roller Are designed to be smaller than in the loaded position where they are crimped against each other (the latter position, ie the loaded position, is the position occupied by the roller during the drafting operation, the drafting operation) The sliver is conveyed through the drafting device during which it is drafted). Thus, the roller and the opposing roller are fully abutted against one another in the loading position (at least before the sliver is guided into the drafting device), thereby forming a nip line, whereas the roller and the opposing roller In the intermediate position, contact is made only via a contact area smaller than the above-mentioned nip line. When the roller is moved towards the counter roller and thus into the load position, this compensates for any possible deflection of the rotating shaft and / or the existing play in the area mentioned above, resulting in the roller and the counter roller An approximately constant, even completely constant, nip force is formed over the entire nip line formed by the A uniform force is thereby applied to the sliver introduced into the drafting device over its entire width (i.e. over a spatially extending length extending perpendicularly to the transport direction), as a result of which the sliver's particularly uniform A draft occurs.

  In other respects, it is desirable here that the actual value of the crimping force during the drafting operation is adjustable by means of the corresponding load element, which is formed, for example, as a pneumatic cylinder, It should be pointed out that by means of the mast cylinder the load force can be transmitted to the roller or the bearing of the counter roller, whereby the roller and the counter roller can be crimped together.

  Furthermore, it is pointed out generally here that the concepts used "roller" and "counter roller" are not stated in terms of their spatial orientation with respect to one another. It is also possible that the roller is arranged vertically above the counter roller, ie the conveying direction of the drafting device extends vertically. Similarly, the transport direction of the drafting device may extend perpendicularly or obliquely to the horizontal and vertical lines, whereby the rollers and the counter-rollers are offset side-by-side or inclined relative to each other It may be arranged.

  Furthermore, it is clear that the following description usually relates to the roller and its corresponding counter roller. Naturally, the drafting device according to the invention comprises a plurality of roller devices, which each comprise at least one roller and at least one counter roller. Finally, it should be pointed out that a plurality of opposing rollers may be arranged corresponding to one roller of the drafting device, or a plurality of rollers may be arranged corresponding to one opposing roller. In this case, it is also possible for one or more rollers and / or counter-rollers to be wound by one belt, which makes it possible in particular to guide the sliver.

  Within the scope of the present invention, it is sufficient if at least one roller or counter roller of the roller arrangement can move between the above mentioned rest position and the above mentioned intermediate position.

  In this case, the contact area at the intermediate position has at least a factor of 10, preferably at least a factor of 20, particularly preferably at least a factor of 50, a smaller contact area than at the loading position, ie at most It is preferred to have a contact area of a value of 1/10, preferably at most 1/20, particularly preferably 1/50. Preferably, the rollers and the counter rollers are in contact with one another in the loading position (without slivers in between) to form a common nip line, which is preferably 2 cm. It has a length of ~ 8 cm. In this case, the contact surface is formed approximately linearly. In this case, the line may have a width of several tenths of millimeters to several millimeters. Preferably, the line has a width of 0.2 mm to 3.0 mm, particularly preferably 1.0 mm to 2.5 mm. On the other hand, the contact surface is, for example, in the form of a dot at an intermediate position. At least the contact area has a significantly smaller value than in the loaded position, so that the above-mentioned advantages with regard to the uniform nip force acting on the sliver during the drafting operation can be realized.

  Furthermore, it is advantageous for the roller body of the roller and the roller body of the counter roller to be in contact at the intermediate position only in the region of one of the end faces. In this case, the rotational axes of the roller body of the roller and the roller body of the counter roller do not extend parallel to one another in the intermediate position. Rather, the axes of rotation or axes of rotation are arranged at an angle to one another but may lie in one common plane. In this case, the axis of rotation of the roller body and / or the assumed extension of the axis of rotation intersect as opposed to the alternatively possible inclined orientation of the axis of rotation.

  The rotational shaft of the roller and the rotational shaft of the opposite roller are also rotatably supported on one side via the respective bearings of the drafting device, the roller body of the roller and the roller body of the opposite roller being at an intermediate position It is also particularly advantageous if the contact is only in the area of the end face opposite the bearing. When the roller is moved from the intermediate position to its loaded position, the contact area, which is initially approximately point-like, transitions to an approximately linear contact area, so that the roller and the counter-roller finally have one common Form a nip line. Over the length of this nip line, the mutual pressure on the roller bodies is also as constant as possible.

  It is particularly advantageous if the axis of rotation of the roller and the axis of rotation of the opposite roller lie in one common plane, at least in the loading position. In the above-mentioned position, the axes of rotation may advantageously (at least partially) extend parallel to one another, so that the above-mentioned nip lines can be formed (in this case alternatively the above-mentioned) An inclined orientation of the rotation axis of is also possible). Likewise, the axes of rotation can be located in one common plane also in the intermediate position and / or in the above mentioned rest position.

  At an intermediate position, an angle α is formed which has a value of 0 ° to 2.0 °, preferably 0.1 ° to 1.0 °, particularly preferably 0.1 ° to 0.8 °. As well as being advantageous. That is, the rotational axis of the roller and the rotational axis of the opposite roller are oriented at a minimum with respect to one another at an intermediate position. In this case, the above-mentioned angles should in each case be chosen to be greater than 0 °, which makes it possible to eliminate parallelism. In this context, the above-mentioned angles do not have to have the same value on all roller arrangements of the drafting device (= rollers and corresponding counter rollers). Rather, the angle may vary between the individual roller devices. In this case, the value of the angle may also depend, for example, on the diameter of the rotating shaft and / or the roller body or the arrangement in the drafting device (usually the drafting device comprises one inlet roller pair, one or more It has an intermediate roller pair and an outlet roller pair, in which case the individual roller pairs are passed one after the other by the sliver in the transport direction).

  It is particularly advantageous if the axis of rotation of the roller and the axis of rotation of the counter roller extend at an intermediate position with respect to one another. In this case, the rollers are not reciprocated between the load position and the rest position in a direction extending linearly in a direction perpendicular to the respective rotation axes. Rather, since the movement takes place, for example, in a pivoting movement, the assumed extensions of the above-mentioned axis of rotation do not intersect at an intermediate position.

  In this regard, the drafting device is a support, having a bearing for the roller and having a support pivotable about a pivot, the pivot of the support and the axis of rotation of the roller being Advantageously, at least in an intermediate position, they run obliquely with respect to one another. The support can accommodate one or more rollers via corresponding bearings, preferably by means of pneumatic, mechanical and / or electromechanically acting holding elements in the loaded position of the rollers. The position can be fixed. In addition, an opposing support may be provided which serves to accommodate or support the opposing rollers, in which case the opposing support is particularly rigidly fixed to the corresponding textile machine or its drafting device. The opposing support can accommodate one or more opposing rollers via corresponding bearings. Finally, it is alternatively or additionally possible that the pivot axis of the support and the rotational axis of the counter rollers extend at least in an intermediate position relative to one another. If the support is pivoted so that the roller is in its loaded position, the rotational axes of the rollers of the at least one roller arrangement and the rotational axes of the opposite roller lie in one common plane Is desirable.

  The drafting device is a support, has a support for the roller, and has a support pivotable about a pivot, the pivot of the support and the rotational axis of the opposing roller at least intermediate It is particularly advantageous if the axis of rotation of the roller and the pivot axis of the support extend at least at an intermediate position with respect to one another, which extend parallel to one another in position. In this case, the small contact surface between the roller and the counter roller in the intermediate position is supported in the support with the roller's rotational axis inclined as viewed from the front of the drafting device (viewing in the direction opposite to the transport direction) It is realized by being done. In this case, the support is preferably pivotable about a horizontally extending pivot axis.

  In an alternative embodiment, the drafting device is a support, having a roller bearing and having a support pivotable about a pivot axis, the pivot axis of the support, the roller And the axis of rotation of the counter extends parallel to each other, at least at an intermediate position, such that the axis of rotation of the opposing roller and the pivot axis of the support extend at an angle to each other at least at an intermediate position. Can be advantageous. In this case, both the rotation axis of the roller and the pivot axis extend obliquely with respect to the horizontal line when viewed from the above-mentioned front, so in this case the opposing roller only through a small contact area at the intermediate position It is ensured that you are in contact with

  The bearing of the rotary shaft on the support or the counter support can in this case be carried out in a nonrotatable or pivotable manner. The roller is rotatably held on the rotation shaft when the rotation shaft is supported in a non-rotatable manner on the support. Correspondingly, when the rotary shaft is rotatably mounted on the support, a non-rotatable connection between the roller and the rotary shaft is provided.

  Further advantages of the invention are described in the following examples.

1 is a schematic side view of a textile machine equipped with a drafting device. FIG. 2 is a perspective view of a portion of the drafting device according to the invention, the roller being in the rest position; Fig. 3 is a partial view shown in Fig. 2 with the roller in a loaded position. FIG. 3 is a partial view shown in FIG. 2 in which the roller is at an intermediate position. FIG. 6 is a perspective view of an alternative form of the drafting device according to the invention, the rollers being in an intermediate position;

  FIG. 1 shows an air spinning machine as an example of a textile machine 2. The air spinning machine may be provided with the drafting device 1 according to the present invention. However, it is generally pointed out here that the drafting device 1 according to the invention can also be used in so-called drawing machines or also in other spinning machines, for example ring spinning machines.

  The air spinning machine exemplarily shown in FIG. 1 serves, inter alia, to form so-called roving yarns 16. The roving 16 is a yarn having a relatively small proportion of wound fibers, or a yarn in which the wound fibers are wound relatively loosely around the inner (especially untwisted) core. This yarn remains extensible. This is important if the roving 16 produced is to be drawn once again by the drafting device 1 in a subsequent textile machine (for example of a ring spinning machine) or must be drawn. The roving yarn 16 can thereby be further processed accordingly (in this case, the drafting device 1 may also be configured according to the invention).

  For this purpose, the air spinning machine generally comprises a drafting device 1 which comprises at least two roller devices arranged one behind the other in the transport direction T of the drafting device 1. There is. These roller arrangements serve for the stretching of the sliver 5. The roller arrangements each have at least one roller 3 and a corresponding counter roller 4, the roller and the counter roller being supported rotatably about the corresponding rotary shaft 7, the roller and the counter roller And the sliver 5 can be guided by being pinched (for reasons of visibility, only one of each of the rotary shaft 7 of the roller 3 and the rotary shaft 7 of the counter roller 4 is provided with a reference numeral ).

  Furthermore, the illustrated air spinning machine in principle comprises a spinning nozzle 21 spaced from the drafting device 1. This spinning nozzle 21 is known from the prior art and is thus provided with an internally located vortex chamber not shown and a thread forming element which is likewise known from the prior art and is therefore not shown and plunged into the vortex chamber. . In the spinning nozzle 21, at least a part of the sliver 5 or the fibers of the sliver 5 is provided with a protective twist.

  Similarly, the air spinning machine has a draw-out unit 15 with preferably two draw-out rollers 14 which can be pivoted about a rotary shaft 7 and a roving 16 arranged behind this draw-out unit 15. A winding device 18 may be included. The winding device 18 itself comprises, in particular, a winding drive 19 and at least one winding receptacle known in principle which is connected to the winding drive 19. The winding tube 17 can be fixed in position in the winding tube accommodating portion, and can be rotationally moved by the winding tube driving device 19. Thereby, the roving yarn 16 can be traversed by the traverse device 20 and wound on the winding tube 17.

  Air spinning machines operate on the basis of a special air spinning method. In order to form the rovings 16, the sliver 5 is guided in the conveying direction T via an inlet opening (not shown) into the vortex chamber of the spinning nozzle 21. In this vortex chamber, the rovings 16 are protectively twisted, ie at least a part of the fibers of the sliver 5 are captured by the air flow formed by the correspondingly positioned air nozzles. In this case, a portion of the fiber is at least partially withdrawn from the sliver 5 and wound around the tip of the thread forming element projecting into the vortex chamber.

  Finally, the fibers of the sliver 5 are withdrawn from the vortex chamber via the inlet opening of the yarn forming element and the extraction channel which is arranged inside the yarn forming element and connected to the inlet opening. In this case, the finally free fiber end is pulled in the direction of the inlet opening on the spiral track, in this case as a wound fiber, wound around the core fiber extending centrally, as a result, A roving 16 with the desired protective twist is formed.

  The roving yarn 16 finally has residual stretchability by only partial rotation of the fibers. This residual drawability is essential for the subsequent processing of the rovings 16 in the following spinning machines, for example ring spinning machines. Conventional air spinning machines, on the other hand, give the sliver 5 a strong rotation, and the drawing required following yarn production is no longer possible. This is also desirable in this case as conventional air spinning machines are usually designed to produce finished yarns which are better at high strength.

  Only a portion of the drafting device 1 according to the invention is shown in FIG. The drafting device 1 can be used, for example, in an air spinning machine as illustrated in FIG. The drafting device 1 includes a plurality of rollers 3 and a plurality of opposing rollers 4 corresponding to the rollers 3. The rollers and the counter rollers each have a roller body 6 and a rotating shaft 7 which serves for the rotatable bearing of each roller body 6. The rotating shaft 7 is mounted in a bearing 11 (simply suggested in FIGS. 2 and 3). In this case, the bearing of the rotary shaft 7 in the bearing 11 can be performed so as not to be able to rotate relative to one another or can be rotated. When the rotary shaft 7 is supported in a non-rotatable manner in the bearing 11, the roller body 6 is rotatably held on the rotary shaft 7. Correspondingly, when the rotary shaft 7 is rotatably supported in the bearing 11, a non-rotatable holding portion of the roller body 6 on the rotary shaft 7 is provided.

  Furthermore, in particular FIG. 2 shows that the roller 3 is preferably supported in a support 12 and the counter roller 4 is supported in a corresponding counter support 9. In this case, the support takes place on one side. That is, each rotary shaft 7 extends between only one end of each of the two end faces 10 of the corresponding roller body 6 and the correspondingly arranged support 12 or counter support 9 (of course, Each roller 3 or group of rollers 3 may be supported in a separate support 12 so that it is possible to adjust the spacing of the rollers relative to one another. The same applies to

  The gist of the present invention can be seen by looking at FIGS. First, FIG. 2 shows the state of the drafting device 1 in which the roller 3 is located at the stationary position, that is, the roller body 6 of the roller 3 and the roller body 6 of the opposing roller 4 are not in contact. The roller 3 occupies this position, in particular when the drafting device 1 is at rest. When the drafting device 1 is stopped, it is desirable that the roller 3 and / or the opposing roller 4 be not driven, and the sliver 5 be removed from the drafting device 1 or be removed.

  Before or shortly after the sliver 5 is fed to the drafting device 1 in the transport direction T, the roller 3 is moved to the loading position illustrated in its FIG. In this case, this may be done, for example, by pivoting of the support 12 about the pivot axis 13 (the pivot axis is only shown in FIG. 3).

  The conventional drafting device 1 suffers from the disadvantage that the pressing forces of the individual roller bodies 6 pressed against one another here are not constant along the contact area 8 (linear in FIG. 3). Because the individual bearings 11 have some play, the axis of rotation 7 usually bends at least minimally. Thus, the sliver 5 guided through between the roller bodies 6 is not pressurized uniformly over its width extending perpendicularly to the transport direction T, so that an uneven draft of the individual fiber sections of the sliver 5 It occurs.

  In order to eliminate this drawback, in the frame of the invention, the rotary shaft 7 of the roller 3 formed according to the invention is in the middle position shown in FIG. 6 are proposed to have an orientation which, viewed in the axial direction of the axis of rotation 7 of the roller 3, forms one common contact area which is smaller than in the loading position shown in FIG. 3 .

  As can be seen from FIG. 4 in this regard, the roller body 6 of the roller 3 and the roller body 6 of the counter roller 4 have only a substantially point-like contact area 8, in particular in the middle position. In this case, this means that the rotational axis 7 of the roller 3 and the rotational axis 7 of the counter roller 4 have an angle α with a value deviating from 0 ° in the above-mentioned intermediate position (with regard to the advantageous values General description is referred to).

  When the roller 3 supported in this way is moved from its intermediate position to the loaded position shown in FIG. 3 by the pivoting of the support 12, a slight amount of play or individual rotational axis 7 present in the bearing 11 is obtained. The deflection is compensated or adjusted such that the crimping force over the entire contact area 8 between the roller 3 and the counter roller 4 is (ideally) constant. The sliver 5 which is guided between the corresponding roller bodies 6 is thereby uniformly loaded over its width, so that the sliver 5 can be drafted particularly uniformly.

  In FIG. 4, the rotation axis 7 of the roller 3 is obliquely supported in the support 12, and the support 12 is pivotable about a pivot 13 extending parallel to the rotation axis 7 of the counter roller 4 While a solution is shown, FIG. 5 shows an alternative embodiment. This alternative embodiment is distinguished by the fact that the axis of rotation 7 of the roller 3 is oriented parallel to the pivot axis 13 of the support 12. In this case, both the pivot shaft 13 of the support 12 and the rotation shaft 7 of the roller 3 are viewed from the front of the drafting device 1 at the intermediate position shown in FIG. Form an angle α which has a different value (highly illustrated as emphasized in FIG. 5). Therefore, in this embodiment, when the roller 3 is located at the intermediate position, the roller body 6 of the roller 3 and the roller body 6 of the opposing roller 4 each have only one contact area 8 in a substantially dotted shape. Will be assured.

  The invention is not limited to the illustrated and described embodiments. The changes within the scope of the claims are also made by any combination of these features, even if the features described are illustrated and described in different parts or several of the specification or in different embodiments. Similarly, it is possible.

DESCRIPTION OF SYMBOLS 1 draft device 2 textile machine 3 roller 4 opposing roller 5 sliver 6 roller body 7 rotating shaft 8 contact area 9 opposing support 10 end face 11 bearing 12 support 13 support pivoting shaft 14 drawing roller 15 drawing unit 16 roving 17 rolls Tube 18 Winding device 19 Winding tube drive device 20 Trajectory device 21 Spinning nozzle α Angle formed by the rotation axis of the roller at the intermediate position and the rotation axis of the opposing roller T Transport direction

Claims (10)

Drafting machine for textile machine (2),
The drafting device (1) comprises at least one roller (3) and a corresponding at least one counter roller (4), between the roller (3) and the counter roller (4) And the sliver (5) is nipped guideable,
The roller (3) and the counter roller (4) each have one roller body (6),
The roller (3) and the counter roller (4) each have one rotational axis (7),
The rotational axis (7) of the roller (3) and / or the rotational axis (7) of the counter roller (4) are supported on one side only,
The roller (3) has a rest position in which the roller body (6) of the roller (3) and the roller body (6) of the counter roller (4) are not in contact; and the roller of the roller (3) The body (6) and the roller body (6) of the counter roller (4) are movably supported between load positions where they are crimped together;
The roller (3) is simply brought into contact with the roller body (6) of the roller (3) and the roller body (6) of the counter roller (4) when transitioning from the rest position to the load position In the drafting device, which can move to an intermediate position,
The roller body (6) of the roller (3) and the roller body (6) of the counter roller (4) have one common contact area (8), the contact area (8) comprising At the intermediate position, the rotational axis (7) of the roller (3) and the rotational axis (7) of the roller (3) are so formed as to be smaller in the axial direction of the rotational axis (7) of the roller (3) than at the load position. A drafting device for a textile machine (2), characterized in that the rotational axes (7) of the counter-rollers (4) are oriented relative to one another.   The contact area (8) has, at the intermediate position, a contact area having a value of at most 1/10, preferably at most 1/20, particularly preferably at most 1/50 of the value at the load position. The drafting device according to claim 1, wherein   The roller body (6) of the roller (3) and the roller body (6) of the opposing roller (4) contact each other only in the area of one of the end faces (10) at the intermediate position. The draft device according to claim 1 or 2.   The system according to claim 1, wherein the axis of rotation (7) of the roller (3) and the axis of rotation (7) of the counter roller (4) are located in one common plane at least in the load position. A draft device according to any one of the preceding three.   The rotary shaft (7) of the roller (3) and the rotary shaft (7) of the counter roller (4) also rotate on one side via the respective bearings (11) of the draft device (1) Being supported, the roller body (6) of the roller (3) and the roller body (6) of the counter roller (4) being opposite the bearing (11) at the intermediate position 5. The drafting device as claimed in claim 1, wherein the drafting device is in contact only in the region of the end face (10) of the side.   Each rotation axis (7) has a value of 0 ° to 2.0 °, preferably 0.1 ° to 1.0 °, particularly preferably 0.1 ° to 0.8 ° at the intermediate position. A drafting device according to any one of the preceding claims, wherein the drafting device forms an angle (α) with.   The rotary shaft (7) of the roller (3) and the rotary shaft (7) of the counter roller (4) extend obliquely with respect to each other at the intermediate position Draft device according to any one of the preceding.   The drafting device (1) comprises a support (12), the support (12) comprising a bearing (11) of the roller (3) and centered on a pivot (13) Pivotable, the pivot axis (13) of the support (12) and the rotational axis (7) of the roller (3) and / or the pivot axis (13) of the support (12) A drafting device according to any one of the preceding claims, wherein the rotation axis (7) of the counter roller (4) extend at an angle relative to one another at least in the intermediate position.   The drafting device (1) comprises a support (12), the support (12) comprising a bearing (11) of the roller (3) and centered on a pivot (13) Pivotable, the pivot axis (13) of the support (12) and the rotational axis (7) of the counter roller (4) extend parallel to one another at least at the intermediate position; 9. The rotary shaft (7) of a roller (3) and the pivot shaft (13) of the support (12) extend at an angle relative to each other, at least in the intermediate position. Draft device according to any one of the preceding.   The drafting device (1) comprises a support (12), the support (12) comprising a bearing (11) of the roller (3) and centered on a pivot (13) Pivotable, the pivot axis (13) of the support (12) and the rotational axis (7) of the roller (3) extending parallel to each other, at least in the intermediate position, 9. The rotary shaft (7) of the counter roller (4) and the pivot axis (13) of the support (12) extend at an angle relative to one another at least at the intermediate position. Draft device according to any one of the preceding.

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