EP2737116B1 - Spinning machine having a compaction device - Google Patents

Description

The invention relates to a device according to the preamble of claim 1.

From practice, a variety of designs are already known, for compacting (compacting) of the votes of a drafting unit fiber material (fiber strand) downstream of a compacting device. Subsequent to such a compacting device, the compacted fiber material, after passing through a nip, a swirl-generating device is supplied. Such a swirl generating device consists for. Example, in a ring spinning machine from a rotor which rotates on a ring, wherein the yarn produced is wound on a rotating sleeve. As compression means are substantially evacuated circumferential, perforated suction drums or circumferential, provided with perforations straps used.

Here, compression devices are known, which can also be subsequently added to existing drafting units.

Such is z. B. from the CN 101613896 A known, wherein an additional element is screwed to the punch to extend the punch of the drafting. At the same time, a gear stage with gear pairs is shown in this embodiment, via which the drive of an additional compression device is to take place.

Furthermore, from the CN 2851298 Y a known embodiment, wherein the compaction roller are fixed with the cooperating rotation locking roller to a frame member in which the pressure roller of the pair of output rollers of the drafting unit is mounted. The frame member is connected via screw to the machine frame, or with the drafting frame. In the apparatus shown, the drive of the suction drum is removed directly via friction from the pressure roller of the pair of delivery rollers. Therefore, this system can also be retrofitted to existing drafting units of a spinning machine. However, it is a large amount of time to include when the spinning machine has to be converted again to a drafting unit without compression. This can be done on spinning machines be very significant with over 1000 spinning stations. Also, the implementation of maintenance intervals is very time consuming, if each time the compactor must be dismantled.

In the not yet published Swiss patent application CH-01992/10 from 26.11. In 2010, therefore, a retrofittable compression unit was proposed, which can be easily mounted as a compact structural unit on the spinning machine. The proposed pivotal attachment can be easily transferred from its installed position in an operating position at the output of the drafting unit. Just as easily, it can be transferred quickly and without special tools from the operating position to a shutdown position. The drive of the compaction roller shown here takes place via friction and special drive means from the driven lower roller of the output roller pair of the drafting unit. In this case, the compression roller is pressed against the lower roller of the pair of output rollers via specially provided on the machine frame pressure elements. The special attachment of such printing elements is complex and the printing elements must be exactly adjusted to the compression roller to be loaded. The transfer of the pressure rollers of the drafting unit and the transfer of the compression unit in its operating position (working position) must be carried out independently of each other in the known solution. Moreover, with this solution, no direct, coordinated positioning of the pivotable pressure lever of the pressure rollers of the drafting unit with the pivotable compression unit is present, which may be disadvantageous under certain circumstances z. B., if the individual rollers are not exactly aligned.

A device for fixing a, about a pivot axis on a machine frame of a spinning machine pivotally mounted compression unit is off DE 102 27 463 C1 known.

It is based on the known prior art, the task of eliminating disadvantages of known solutions and to improve the existing solutions.

It is therefore proposed that in the region of the pivot axis of the support of the compression unit guide means are provided, via which the compression unit, seen in the direction of its pivot axis, is fixed in its, mounted on the machine frame position and the spring element, with which the carrier in the Transfer to the operating position is applied, at the free end of the pressure lever (also called "load arm") is attached.

With the proposed device, both systems (pressure rollers of the drafting unit and the compression unit) can be brought into their operating position and fixed there simultaneously with the operation of only one pressure lever. This results in a simple and fast operation. By means of the spring element or elements, the compression unit is held in its pivoted-in operating position, in which it forms a drive connection (eg via friction) with the lower rollers of the pair of delivery rollers. In addition, the drafting unit is coupled in the operating position directly to the compression unit via the spring element attached to the pressure lever, resulting in a self-contained unit, which is also less susceptible to vibrations.

About the proposed guide means, the compression unit is fixed in a defined position (seen in the direction of its pivot axis) on the machine frame of the spinning machine. The term "spring element" also includes embodiments (or combinations of elements) in which a rigid means (eg, a rod or lever) is acted upon by a spring. That is, instead of the term "spring element", the term "spring-loaded retaining element" can also be used.

Furthermore, it is proposed to provide the carrier with a coupling point, which forms a positive connection in the operating position with the spring element, via which the pressure lever, viewed transversely to its pivoting plane, is fixed relative to the carrier. This gives a completely interlocked and closed system, all roller pairs, viewed in their axial direction are immovable and aligned exactly to each other. Ie. Both swiveling elements "pressure lever with pressure rollers" and "compression unit" are exactly aligned and fixed.

The coupling point on the carrier may be formed with elevations or depressions depending on the performance of the spring element attached to the pressure lever. Essential here is the achievement of a positive connection, via which both elements (carrier of the compression unit and spring element of the pressure lever) are fixed and immovable to each other.

It is further proposed that the spring element is formed of a pivotally mounted on the pressure lever holder, which is acted upon by a spring. This makes it possible to simultaneously transfer the contact pressure to the unit of the compression unit, which is necessary for driving the suction drum via the spring-loaded on the pressure lever mounted holder. That by the contact force sufficient friction force for the drive transmission between the drive elements of the suction drum and the lower roller of the output roller pair of the drafting unit is generated.

Instead of the spring-loaded holder can also be provided that the spring element consists of a leaf spring which is attached directly to the pressure lever. This gives a simplified construction, which unfolds the same effect.

Furthermore, it is proposed that the support is provided with a suction channel, one end of which opens in the area of the pivot point of the support and the other end in the region of a suction insert projecting into the compression element. This results in a compact unit in which the suction channel is integrated and which in its entirety can be locked via the coupling point with the pressure lever. That the compression unit with integrated suction channel results in a compact and closed unit, which can be quickly and easily assembled or disassembled as needed.

It is further proposed that the carrier is provided with a U-shaped end piece with which it partially engages in the mounted position at a coupling point a circular channel which is fixed to the machine frame and connected to a vacuum source. This ensures trouble-free and simple coupling of the compression unit into a first shutdown position on the machine frame, before it is transferred and fixed in its operating position via the pressure lever and the lever attached thereto. However, there are also other solutions conceivable to attach the compression unit, or its carrier via a pivot axis on the machine frame.

In order to securely fix the compacting unit (structural unit) in the axial direction of the suction drum or transversely to the material flow direction of the fiber material, it is proposed that guides for laterally fixing the U-shaped end piece be provided in the area of the coupling point. It can be provided on the channel lateral guides for the wearer to fix it in place. Likewise, it is also possible to provide depressions in the circular channel into which the carrier protrudes and is thus guided laterally.

It is further proposed that the pinch roller (also called "rotation lock roller") is rotatably mounted on a pivotally mounted on the carrier pressure arm.

It is advantageous for a compact and closed design when a spring element is provided between the pivot axis of the pressure arm and the axis of rotation of the roller. Due to the existing in the spinning fiber fly a closed design of moving elements (such as spring elements) is advantageous to avoid contamination of these parts.

In order to obtain a dead center position for the transfer of the roller from an inoperative position to an operating position, it is proposed that the pivot axis of the pressure arm is above the plane which runs through the pivot axis of the carrier and the axis of rotation of the suction drum.

It can be transferred from a first position above the connecting line between the pivot axis of the pressure arm and the axis of rotation of the compression element in a second position below this connection line overcoming a dead center position during the transfer process of the carrier from an inoperative position to an operating position, the axis of rotation of the roller.

In order to keep the pressure arm of the pinch roller in the Übertotpunktlage, it is proposed to provide a stop on the carrier, which projects into the range of movement of the pressure arm to hold this in this second position.

In order to easily transfer the carrier of the compression unit in its first shutdown position on the machine frame, it is proposed that the machine frame Guides are provided, via which the carrier is guided in the transfer to a first, external pivot position to the coupling point.

The assembly of the compression unit usually extends over two drafting units (twin drafting), wherein two suction drums are mounted on a support of the assembly. It is therefore proposed that the drafting unit is a twin drafting system with two adjacent drafting systems, the pressure rollers are held by a common pressure lever and the respective output roller pair of drafting systems associated suction drums are mounted rotatably on a common carrier with pinch roller.

Further advantages of the invention will be described in more detail in subsequent embodiments and shown.

Fig.1

eine schematische Seitenansicht einer Streckwerkseinheit mit einer angebauten und in Verriegelungsstellung befindlicher Baueinheit einer Verdichtungseinheit.

Fig.1a

eine vergrösserte Ansicht X nach Fig.1 von der Kopplungsstelle

Fig.1b

eine Seitenansicht nach Fig.1a

Fig.2

eine schematische Teilansicht der Verdichtungseinheit in einer Ausserbetriebsstellung mit einer Klemmwalze oberhalb der Totpunktstellung

Fig.3

eine schematische Teilansicht nach Fig.2 mit einer Walze in der Totpunktstellung

Fig.4

eine schematische Teilansicht nach Fig.2 mit einer Walze unterhalb der Totpunktstellung

Fig.5

eine weitere Ausführungsform der Erfindung nach Fig.1

Fig.5a

eine vergrösserte Ansicht Y nach Fig.5 mit Seitenführungen zur seitlichen Fixierung für den Träger der Verdichtungseinheit.

Fig.5b

eine verkleinerte Draufsicht N nach Fig.5

Show it:

Fig.1

a schematic side view of a drafting unit with an attached and located in the locking position unit of a compression unit.

1a

an enlarged view of X after Fig.1 from the coupling point

1b shows

a side view after 1a

Fig.2

a schematic partial view of the compacting unit in an inoperative position with a pinch roller above the dead center

Figure 3

a schematic partial view after Fig.2 with a roller in the dead center position

Figure 4

a schematic partial view after Fig.2 with a roller below the dead center position

Figure 5

a further embodiment of the invention according to Fig.1

5a

an enlarged view Y after Figure 5 with side guides for lateral fixation for the carrier of the compression unit.

5 b

a reduced top view N after Figure 5

FIG. 1 shows a schematic side view of a spinning station 1 a spinning machine (ring spinning machine) with a drafting unit 2, which is provided with an input roller pair 3, 4, a middle roller pair 5, 6 and a pair of output rollers 7, 8. To the center rollers 5, 6 is in each case a strap 12, 13 out, which are each held around a cage, not shown in detail in its illustrated position. The upper ones Rollers 4, 6, 8 of said pairs of rollers are designed as pressure rollers which are rotatably mounted on the axes 4a, 6a, 8a on a pivotally mounted pressure lever 10. The pressure lever 10 is pivotally mounted about an axis 15 and, as shown schematically, acted upon by a spring element F. This spring element can, for. B. also be an air hose. About the spring load shown schematically, the rollers 4, 6, 8 pressed against the lower rollers 3, 5 and 7 of the roller pairs to form a nip for the fiber material. The roller pairs 3, 5, 7 are, as indicated schematically, connected to a drive A. In this case, individual drives, as well as other forms of drive (gears, timing belts, etc.) can be used. About the driven lower rollers 3, 5, 7, the pressure rollers 4, 6, 8, and the belt 13 are driven via the belt 12 via friction. The peripheral speed of the driven roller 5 is slightly higher than the peripheral speed of the driven roller 3, so that the, the drafting unit 2 supplied fiber material in the form of a sliver L between the input roller pair and the middle roller pair 5, 6 is subjected to a pre-delay. The main distortion of the fiber V arises between the middle roller pair 5, 6 and the pair of output rollers 7, 8, wherein the output roller 7 has a substantially higher peripheral speed than the center roller 5.

Like from the FIG. 5b (View N after FIG. 5 ) can be seen, a pressure lever 10 is assigned to two adjacent drafting units 2 (twin drafting). Since it is the same or partially mirror-image arranged elements of the adjacent drafting units, or compression devices, the same reference numerals are used for these parts.

The drawn out of the pair of output rollers 7, 8 stretched fiber material V is deflected downward and enters the region of a suction zone Z of a subsequent suction drum 17. The respective suction drum 17 is provided with extending on its circumference perforations or openings Ö. Within the rotatably mounted suction drum 17, a stationary mounted suction insert 18 is arranged in each case, which is fastened to a support 20 of a compression unit VM. Designs and arrangements of the absorbent insert are in the not yet published Swiss patent application CH-01992/10 from 26.11. Shown in 2010. Also shown there are drive elements, the are connected to the respective suction drum 17 and occupy a frictional connection in the operating position with the lower roller 7 of the pair of output rollers. In any case, the respective suction roll 17 or drive means connected to it lies on the circumference of the driven roller 7 and is driven by the latter via friction. The contact pressure of the suction roller 17 on the lower roller 7 takes place in the example of Fig.1 via a lever 55 which is pivotally mounted about an axis 56 on the pressure lever 10. The lever 55 is provided with an extension 57 which extends from the pivot axis 56 along the pressure lever 10. At a distance from the pivot axis 56, a spring F1 is attached to the pressure lever 10, which is fastened at its other end, also at a distance from the pivot axis 56 on the lever 55. By the spring F1, the lever 55 is pivoted in relation to its pivot axis 56 counterclockwise. In the in Fig.1 shown operating position, where the pressure lever 10 is closed, this, generated by the spring F1 pivoting movement is limited by a top 60 which is fixed to the carrier 20 of the compression unit VM. As from the enlarged views of 1a (View X after Fig.1 ) to 1b shows can be seen, takes a, attached to the free end of the lever 55 web 62 via its recess 61 with the top 60 a positive connection. Thus, the pressure lever 10 and the pressure lever fixed pressure cylinder 4, 6, 8 fixedly coupled to the carrier 20 of the compression unit VM, whereby the lateral positioning of these pressure rollers relative to the suction roller 17 and the pinch roller 33 takes place. Ie. the pressure lever 10 is thus indirectly via the compression unit VM transversely to its pivot plane SE ( 5 b ) also fixed relative to the machine frame MR. In addition, it is ensured by this simultaneous locking of the drafting unit 2 and the compression unit VM via only one pressure lever 10, that at the latched operating position of the pressure lever and the suction drums of the compression unit are in the operating position. This was not always guaranteed with previous solutions with independent locks. That is, if it was forgotten before starting the spinning machine to transfer the compression unit VM in its operating position, it could lead to material buildup between the drafting unit 2 and the subsequent compression unit VE, whereby the spinning process was interrupted at the corresponding spinning station. This is now by the invention proposed common locking in the operating position avoided by the drafting unit 2 and the compression unit VE via the pressure lever. That is, fiber material is supplied to the compacting unit only when the drafting unit is closed.

The suction roll 17, or two suction rolls 17 (FIG. 5 b ), or are rotatably mounted on a carrier 20 of the compacting unit VM on a shaft 22 fixed to the carrier. Within the carrier 20 there is a suction channel SK which communicates with the respective suction insert 18, as shown schematically in FIG Fig.1 will be shown. At the, a machine frame MR of the spinning machine facing the end of the carrier 20, the carrier is provided with a U-shaped end piece 46, in which the suction channel SK opens with an opening S2. The opening S2 is in the position shown an opening SR of a suction tube 50 opposite, which is fixed to the machine frame MR of the spinning machine.

With a mounted at the end of the carrier 20 U-shaped end piece 46 of the carrier 20 is pivotally mounted about the center axis MA of the suction pipe and thus forms a coupling point KS. By a massively trained tail 46 with respect to the dimension of the suction pipe 50, a clamping action between the suction pipe 50 and the end piece 46 is achieved, whereby the carrier 20 is held on the suction pipe 50.

As schematically in Fig.1 is indicated, 50 guides 30 are fixed on both sides of the end piece 46 on the suction pipe, via which the end piece 46 and thus the compression unit VM is laterally fixed in the direction of the center axis MA. This is also from the enlarged view of the 5a (View y after Figure 5 ) refer to. By this lateral fixation of the compression unit on the suction tube 50 and thus on the machine frame MR is held via the coupling point 55, 60, 62 and the pressure lever with the pressure rollers 4, 6, 8 relative to the machine frame in a fixed position.

In a suction zone Z, under the action of a negative pressure applied via a vacuum source SP, an integration of the outer projecting fibers is made and the fiber material is compressed. For this purpose, the respective suction drum is provided with openings O on its periphery, which cooperate with suction slots, not shown, of the suction insert 18.

Subsequent to the suction zone Z a clamping roller 33 is provided for each of the suction drums 17, which is held in a pressure arm 71 and rests on the respective suction drum 17 via a pressure load and forms a nip line P with this. In this case, the respective pinch roller 33 is rotatably mounted on an axle 32 which is fixed to a piston 70 of a pressure arm 71. The piston 70 protrudes into a cylinder 72, in which it is displaceably guided in the longitudinal direction and loaded by a compression spring F2. By this load, the pinch roller 33 is pressed in the direction of the suction roller. The cylinder 72 is pivotally mounted on an axle 24 which is connected to the carrier 20. The pressure arm 71 thus consists in the present example of a cylinder 72 having a pivot axis 24 and a loaded with a spring F2 piston 70th

The nip P at the same time forms a so-called "rotation lock gap", from which the fiber material in the conveying direction FS in the form of a compressed yarn FK is supplied under rotation distribution of a ring spinning device shown schematically. This is provided with a ring 39 and a rotor 40, wherein the yarn is wound on a sleeve 41 to form a coil 42 (Kops). Between the nip line P and the rotor 40, a yarn guide 43 is arranged. The ring 39 is attached to a ring frame 44, which performs an up and down movement during the spinning process.

In order to be able to aspirate the yarn FK delivered further via the clamping point P in the event of a broken yarn between the nip line P and the spool 42, a suction pipe 75 is attached to both sides of the support 20 and is provided with an opening (not shown). The suction pipe opens into the suction channel SK of the carrier 20th

In the embodiments of the Fig.2 to Fig.4 the transfer of the suction drums 17 is shown from an inoperative position to an operating position. The carrier 20 is shown only schematically dash-dotted lines.

How out Fig.2 is to be transferred via the guide 52 (which simultaneously forms a stop for the lower pivot position of the compacting unit VM), the carrier 20 is transferred from a representation shown in dashed lines in a mounted first out of service position. This is when moving the carrier in the direction of the suction pipe 50 pushed the tail 46 in the coupling position KS on the suction pipe 50 by hand until it is seated on the suction pipe and clamped there. The end piece 46 can now be pivoted about the end piece 46 of the carrier 20, or the entire compression unit VM about the center axis MA of the suction tube 50 in the direction of the pair of output rollers 7, 8 of the drafting unit 2.

How out Fig.2 can be seen in the pivoting (see arrow), the pinch roller 33 to rest against the lower roller 7 of the pair of output rollers 7, 8 of the drafting unit 2. Upon further pivoting the pinch roller 33 reaches the in Figure 3 shown dead center, in which the rotation axis 32 comes to lie exactly on the connecting line VL between the axis 22 of the suction drum 17 and the pivot axis 24 of the cylinder 72. By arranged in the cylinder 72 spring F2, the pinch roller 33 is always held in contact with the outer circumference of the suction drum 17. Upon further manual pivoting of the compression unit VM in the direction of the arrow, the position is reached, which in Figure 4 is shown schematically. In this case, the suction roller 17 or drive means connected to it comes into contact with the lower roller 7, whereby a drive connection between the driven roller 7 and the suction roller 17 is produced via a frictional connection (friction). At the same time the pinch roller 33 is pivoted under the action of the lower roller 7 and the spring F2 in an over-center position, which in Figure 4 is shown. That is, the axis 32 of the pinch roller 33 is now below the connecting line VL between the axis 22 of the suction drum 17 and the pivot axis 24 of the cylinder 72. In order to restrict the pivotal movement of the cylinder 72 and thus the pinch roller 33 down, is on the support 20 a Stop 64 mounted on which the cylinder 72 comes to rest ( Figure 4 ). In the in Figure 4 shown operating position forms the pinch roller 33 under the action of the spring F2 a nip P with the suction drum 17 and is driven by friction of the suction drum. After reaching the in Figure 4 shown operating position of the pressure lever 10 is closed (as already described), wherein the compression unit VM is locked to the plug-in unit unit 2 via the web 55 attached to the web 62 and provided on the support 20 essay 60.

The dismantling of the compression unit takes place in the reverse direction. The return of the pinch roller 33 after disassembly into the in Fig.2 shown position can be done manually.

The embodiment of Figure 5 corresponds essentially to the embodiment of the Fig.1 , The only difference is the locking lever 10 attached to the locking element. In this case, instead of the lever 55, a leaf spring 68 is used, which is fastened by means of screws 69 on the pressure lever 10. The present in dashed lines and high tilted position existing angle c of the leaf spring 68 is increased when the shown with solid lines and closed operating position is taken. Thus, the leaf spring exerts a compressive force in the direction of the attached to the carrier 20 essay 60 in the region of its end-mounted web 62, whereby the compression unit is locked in this position.

It is also possible to mount the attachment 60 directly in the area of the bearing for the axle 22. There is still a variety of design variants in the field of locking possible.

The proposed invention provides a simple operation in connection with the assembly and disassembly of the compression unit. In addition, the positions of the rollers of the drafting unit and the compression unit are fixed relative to the machine frame exactly during the entire operating period to each other by the proposed lock. This ensures consistent conditions during the entire service life.

Claims (14)

1. A device for fixation a compaction unit (VM) for compacting a fiber composite (V) which is pivotably supported on a machine frame (MR) of a spinning machine by a pivot axis (MA), with a drafting arrangement unit (2) including consecutively arranged drafting arrangement roller pairs (3, 4; 5, 6; 7, 8) having pressure rollers (4, 6, 8) that are held in place on a pressure lever (10), which is pivotably supported on the machine frame (MR), and the compaction unit (VM), which is arranged downstream of a delivery roller pair (7, 8) of the drafting arrangement unit (2) includes a support (20), which at least one suction drum (17) that is provided with a suction zone (Z) and that is rotatably supported on the support (20), and upon the suction drum rests, in order to achieve a nip line (P), one nip roller (33) respectively at the end of the suction zone (Z), under the effect of a compressive element (F2), and the pivot axis (MA) of the compaction unit (VM) extends parallel and at a distance relative to the axes of rotation (7a, 8a) of the delivery roller pair (7, 8), and in order to form a drive connection between the lower roller (7) of the delivery roller pair (7, 8) and the suction drum (17), the support (20) is subject to compressive force applied thereto via at least one spring element (F1, 55; 68) at a distance relative to the pivot axis (MA), whereby the suction drum (17) is moved against the lower roller (7) of the output roller pair (7, 8), characterized in that, guide means (30) are provided in the area of the pivot axis (MA) of the support (20) of the compaction unit (VM) by which the compaction unit is fixed in position, seen in the direction of the pivot axis (MA) thereof, on the machine frame (MR), and in that the spring element (F1, 55; 68) is mounted on the free end of the pressure lever (10).
2. The device according to claim 1, characterized in that the support (20) is provided with a coupling point (60) that forms a positive connection in the operating state with a coupling point (62) of the spring element (F1, 55; 68) by means of which the pressure lever (10) is fixed in place relative to the support (20), seen transversely relative to the pivot plane (SE) thereof.
3. The device according to any one of the claims 1 to 2, characterized in that the spring element is constituted of a lever (55) that is pivotably mounted on the pressure lever (10), which has compressive force applied thereto by a spring (F1).
4. The device according to any one of the claims 1 to 2, characterized in that the spring element is a leaf spring (68).
5. The device according to any one of the claims 1 to 4, characterized in that the support (20) is provided with a suction channel (SK) having one end that opens in the area of the pivot point (MA) thereof and the other end in the area of a suction insert (18) that extends Into the suction drum (17).
6. The device according to claim 5, characterized in that the support (20) is provided with a U-shaped end piece (46) by which, when in the mounted position, it partially grasps around a circular channel (50) at a coupling point (KS) with the machine frame (MR), and which is fastened to the machine frame (MR) and connected to a negative pressure source (SP).
7. The device according to claim 6, characterized in that guide means (30) are provided in the area of the coupling point (KS) for the lateral fixation of the U-shaped end piece (46).
8. The device according to any one of the preceding claims, characterized In that the nip roller (33) is disposed, with the ability to rotate freely, on a compressive arm (71) that is pivotably mounted on the support (20).
9. The device according to claim 8, characterized in that a spring element (F2) is disposed between the pivot axis (24) of the compressive arm (71) and the axis of rotation (32) of the nip roller (33).
10. The device according to any one of the claims 8 to 9, characterized in that the pivot axis (24) of the compressive arm (71) is disposed above the plane that extends through the pivot axis (MA) of the support (20) and the axis of rotation (22) of the suction drum (17).
11. The device according to claim 10, characterized in that a stop (64) is provided on the support (20) that extends into the motion range of the compressive arm (71), and by which the compressive arm is held in a position over dead center.
12. The device according to any one of the preceding claims, characterized in that guide means (52) are provided on the machine frame (MS) that guide the support during the transfer into a first non-operational pivot position (52) to the coupling point (KS).
13. The device according to any one of the preceding claims 1 to 12, characterized in that the drafting arrangement unit (2) is a twin drawing system unit with two drafting arrangements disposed next to each other, and the nip rollers (4, 6, 8) thereof are retained by a common pressure lever (10), and the suction drums (17) that are allocated to the respective delivery roller pair (7, 8) of the drafting arrangements are rotably supported including nip roller (33) of the compaction unit (VM) on a common support (20).
14. A spinning machine with an device according to any one of the claims 1 to 13.

Images