EP2643507A1 - Spinning machine comprising a compaction device - Google Patents

Abstract

The invention relates to a device for compacting a sliver (V) on a spinning machine which sliver is output by an delivery roller pair (7, 8) of a drawing system unit (2) to a guide surface of a suction zone (Z) of a driven and rotating compaction element (17) that is supplied with suction air, said guide zone being under the effect of suction air, at least one rotatably received pinch roller (33) being associated with the compaction element downstream of the suction zone (Z) to form a pinch line (P). In order to make it possible to retrofit existing spinning machines with a compaction device, additional complex drive means had to fitted, and sometimes it had been necessary to spend a lot of time on fitting such devices. In order to overcome these drawbacks, the device according to the invention has a compaction element (17) and a pinch roller (33) which are rotatably mounted on a common support (20), said support being detachably fastened to the spinning machine by fastening means (46). The compaction element (17) has openings (Ö) and comprises at least one drive element (28) that forms a drive connection with the lower roller (7) of the delivery roller pair (7, 8) via a loading device (55, 58) when the compaction element is transferred from an idle position to an operating position. The support comprises a suction channel (SK) for the suction air of the compaction element (17) and a first end (S1) of the suction channel (SK) is connected to the compaction element and a second end (S2) of the suction channel (SK) ends in the region of the support (20) by means of which the support is fastened to the spinning machine when mounted.

Description

 Spinning machine with compacting device

The invention relates to a device for compressing a fiber structure on a spinning machine, which is discharged from a pair of output rollers of a drafting unit to a suctioned guide surface of a suction zone of a subsequent, acted upon with suction, driven, circumferential compression element, which at least one rotatable following the suction zone A plurality of designs are already known from practice, wherein a compacting device is arranged downstream for compacting (compacting) the fiber material (fiber strand) delivered by a drafting unit. 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. In this case, a special suction region is defined on the compaction element using corresponding inserts within the suction drum or within the circumferential straps. Such inserts can be z. B. are provided with correspondingly shaped suction slots, to which a negative pressure is applied, whereby a corresponding air flow is generated at the periphery of the respective compression element. By this air flow, which is aligned substantially transversely to the transport direction of the fiber material, in particular protruding fibers are involved.

In the known solutions, the fiber material discharged by the drafting unit is guided above or else below the compacting devices used. In particular, when used on a ring spinning machine, it is necessary to provide an additional nip following the suction zone in order to obtain a twist lock.

CONFIRMATION COPY Such devices are z. For example, in publications EP 947 614 B1, DE 10 2005 010 903 A1, DE 198 46 268 C2, EP 1 612 309 B1, DE 100 18 480 A1 and CN 1712588 A have been shown and described. The publications mentioned above are essentially permanently installed compaction devices which are permanently installed following the respective drafting system. The drive of these compressing devices takes place partly by means of special drive shafts arranged over the length of the spinning machine, which are in driving connection with either a suction roll or a circulating belt or via permanently installed drive connection to correspondingly arranged pressure rolls of the compacting device. Also examples of the cited publications drive examples can be seen, wherein the drive of the compression device via additional drive elements from the top or bottom roller of the output roller pair of the drafting unit takes place. In practice, the requirement existing spinning machines with a conventional drafting unit with such a compacting device after equip to secure the possibility of producing high quality yarns. Therefore devices have been proposed with which conventional drafting systems can be retrofitted with such a compacting device. Such is z. Example, from DE 102 27 463 C1, wherein the punch of the drafting unit is extended to support an additional drive roller, which is provided for driving the retrofitted compacting device, which is also arranged on this extension. The drive roller extends over the entire length of the spinning machine. The installation and installation of such a retrofit is very time consuming and inflexible. D. h., In a desired dismantling to a normal drafting without compression device again a very high amount of time is necessary.

From CN 01613896 A a version is known, wherein an additional element is screwed to the punch to extend the punch of the drafting system. At the same time, a gear stage with gear pairs is shown in this embodiment, via which the drive of an additional compression device should. This device is relatively time-consuming for the subsequent attachment, in particular by the additional installation of the gear stage shown.

Furthermore, the published DE 100 50 089 C2 shows an embodiment with a compacting device, which is provided for retrofitting to a conventional drafting device. In this case, a device is proposed, which makes it possible to retrofit the drafting unit with a compacting device without additional drive links. In the embodiments of this publication, different embodiments of compacting devices are shown, wherein in all the devices shown a second clamping point for the fiber material is formed by the compacting device itself or via drive elements connected to the compacting device. In this case, the compacting device or with this associated drive elements on the top roller of the pair of output rollers of the drafting unit. Ie. no additional clamping point is provided on the compacting device, which is formed independently of the rollers of the drafting device. As a result, the fiber material discharged from the terminal point of the delivery rollers of the drafting unit does not come to rest in the region of the suction zone, which is located in front of the second terminal point. Ie. The fiber material discharged by the drafting unit moves for the most part at a distance from the surface of the compression device in the region of the suction zone. Thus, a controlled compression, or integration of protruding fibers is not guaranteed. As the additionally installed compacting device is attached to the spinning machine, or to the drafting unit, is also not apparent from this publication.

From CN 2 851 298 Y a device is known in which a compaction roller with a rotation locking roller are received in a bearing element, which is connected via a plate via screws with a pivotable loading arm of a drafting device. In the mounted and locked position, the drive is transmitted via friction from a directly connected to a drive output roller and its associated pressure roller on the compression roller and the rotation locking roller. The compacting device shown here is also suitable for retrofitting to existing drafting equipment of spinning machines provided without compression, The attachment of the compression unit shown here to an existing drafting unit via a screw, as well as the threading at the axis of the pressure roller is relatively time consuming and requires an additional adjustment of the distances. Similarly, the connection to a vacuum source must be made separately. Since the compaction roller is driven only indirectly by friction from a directly connected to a drive roller, arise in this solution drive losses.

The invention is thus based on the object of proposing a compacting device which can be easily and quickly installed on conventional drafting unit without the need for additional drive elements. The disadvantages of known designs should be avoided, with a simple and fast assembly and disassembly of a compacting device is ensured. This object is achieved by proposing that the compression element and the pinch roller are rotatably mounted on a common carrier, which is fastened detachably via fastening means on the spinning machine and the, provided with openings, circumferential compression element has at least one drive element, which in the Transfer of the compression element from an inoperative position to an operating position with the lower roller of the pair of output rollers via a load device forms a drive connection, wherein the carrier has a suction channel for the suction of the compression element and a first end of the suction channel is in communication with the compression element and a second end of the suction channel ends in the region of the carrier with which the carrier is mounted in its mounted position on the spinning machine .. This makes it possible, the additional compacting device as a complete replacement module perform which can be easily and quickly attached to existing devices for attachment to a conventional drafting system. No additional drive devices are necessary, since the drive of the compression element is taken off directly from one of the rollers of the delivery roller pair of the drafting unit. It can be provided via a friction connection or a connection via a positive connection (gear pairing). The compression element and the drive element may be located adjacent to a common axis of rotation.

Preferably, it is further proposed that the second end of the suction channel ends in the region of a bearing surface of the carrier, with which the carrier rests in the mounted or installed position on an element of the spinning machine. The proposed integration of a suction channel within the carrier of a part of additional cable guides are avoided and on the other hand one obtains a compact and closed design, which allows the connection of the suction channel to existing elements of the spinning machine.

It is further proposed that the element of the spinning machine to which the carrier is attached is a channel fixed to the spinning machine, which communicates with a vacuum source and is provided with openings arranged in the region of the attachment point of the respective carrier , With this proposal, it is possible that the suction channel arranged in the carrier is simultaneously connected to the vacuum source in the attachment of the carrier to the channel.

In order to completely isolate this connection from the ambient air, it is proposed that the end of the suction channel of the carrier facing the channel be provided with elastic sealing elements placed around the opening of the suction channel, wherein in the mounted position of the respective carrier in the operating position Opening the suction channel and the respective opening of the channel facing the spinning machine and the sealing elements lie sealingly on the channel.

It is also possible in the region of the opening of the suction channel of the carrier, which faces the channel of the spinning machine to provide interchangeable inserts. With these inserts, the opening can be adjusted in its cross-section to ensure that the same pressure conditions prevail on all compression modules used on the spinning machine. Ie. depending on the distance to the vacuum source, where the compression module is attached to the spinning machine, a corresponding insert can be provided. In DE 100 41 363 A1, a device described where for adapting the pressure conditions, the suction lines per spinning station are designed accordingly. Here, however, permanently installed compression devices are shown.

 Furthermore, it is proposed that the channel has a circular cross-section and the support is provided with a unilaterally open, U-shaped end piece, with which it rests in the mounted position with its inner surface on the circular channel and this partially engages. The U-shaped end piece serves as a fastening means, via which the carrier is attached to the spinning machine. The trough is designed U-shaped, wherein the opening of the U-shaped end piece shows when mounting in the direction of the spinning machine. This makes it possible, for attaching the compression module, simply attach the carrier to the circular channel. The dimension of the U-shaped end piece (in particular its clear width) is to be chosen so that a sufficient clamping force between the circular channel and the U-shaped end of the carrier is present. In order to reinforce the clamping action, it is conceivable to form the circumferential angle of the inner surface of the end piece in the region of the support surface a little over 180 degrees. In this case, the carrier should be at least partially elastic in the region of the end piece, so that an elastic deflection of the U-shaped legs of the end piece movement is possible. This combination, wherein the inner surface of the U-shaped end piece rests on a portion of the outer circumference of the circular channel, allows the carrier with the compacting device (as a complete compaction module) to be pivoted about the central axis of the circular channel. This makes it possible for the compacting device to be able to be pivoted away from the region of the output roller pair of the drafting unit unit without having to remove the carrier from the channel. The pivoting movement can, as is generally known, be limited by corresponding stops.

To achieve a different peripheral speed between the pair of output rollers of the drafting unit and the peripheral compression element is further proposed that a gear stage is provided between the drive element and the rotating element. In practice, it has been shown that it is advantageous, in particular when using oblique suction slits, if the Um- The speed of the compression element is slightly lower than the peripheral speed of the output roller pair. This is due to the longer travel path, which the fiber material has to cover in the area of the suction zone. Preferably, it is proposed to carry out the drive element as a friction wheel, which is frictionally held in the working position via a loading device in contact with the lower roller of the pair of output rollers.

The circumferential compression element may be formed from a suction drum.

It is proposed that the suction drum has bearing elements, via which it is rotatably mounted on a, fixed to the carrier shaft and fixed on the shaft securing means in the axial direction on the shaft can be fixed. This allows a simple and quick disassembly and assembly of the suction drums on the shaft fixed to the carrier.

Preferably, the pinch roller may be mounted below the suction drum, following the suction zone. Ie. The fiber material discharged from the pair of delivery rollers of the drafting unit is deflected downwards and guided in a suction zone on the suction drum before it reaches the area of the nip with the pinch roller.

It is further proposed that the friction wheel is formed as a symmetrical ring which rests with its circular inner surface on a portion of the peripheral surface of a circular projection, which is connected axially parallel to the suction drum, wherein the inside diameter of the friction wheel is greater than the outer diameter of the approach. This design leads to an advantageous and encapsulated against dust solution. In addition, such a gear stage requires little power and is quiet, especially when the annular friction wheel is made of an elastic material (eg rubber). The annular dimension of the friction wheel is to be chosen so that in the operating position, the friction wheel is in frictional contact on one of the driven rollers of the pair of output rollers and the peripheral surface the suction drum has a certain distance from the roller, which is in driving contact with the friction wheel.

Furthermore, it is proposed that the suction channel is connected to at least one suction pipe for a thread extraction. This makes it possible to combine the yarn extraction with a yarn break as well as the suction for the region of the suction zone with each other and to integrate in the module of the compacting device. The opening of the suction channel is, as is well known, following the nip between the compression element and the associated pinch roller.

Furthermore, it is proposed that the pinch roller is fastened to the carrier via a spring element which carries a bearing receptacle for the axis of rotation of the pinch roller and generates a clamping force in the region of the nip on the compacting element. Thus, the loading device for the pressure roller is integrated directly on the module of the compression device, which possibly necessary settings of

Clamping force, or the nip line can already be made before assembly to the spinning machine.

It is advantageous if the carrier is mounted transversely to the axes of rotation of the Ausgangswalzenpaa- res pivotally mounted on the spinning machine and holding means are provided on the spinning machine, which mounted in the swivel range of the carrier

Protect elements and which limit the pivotal movement of the carrier at least in a pivoting direction. This makes it possible to lock the compression element, including its pressure roller, on the one hand in its working position and, on the other hand, to pivot it into an inoperative position in order to carry out the necessary maintenance work. Furthermore, it is advantageous if, as further proposed, the holding elements consist of spring elements fastened to the spinning machine, via which the drive wheel is held in frictional engagement with one of the rollers of the pair of delivery rollers in a locking position with the elements of the carrier designed as a latch. This allows two functions to be combined simultaneously. On the one hand the compaction module is held in a working position and on the other hand, a corresponding pressure force on the Applied friction wheel to produce a frictional engagement with the corresponding driven roller of the pair of output rollers. In general, two such spring elements are provided for a compression module, wherein in each case a spring element is arranged laterally of the carrier.

Furthermore, it is proposed that the drafting unit is designed as a double drafting system with two adjacent drafting systems with a common loading arm and each, the output roller pairs associated compression elements are rotatably mounted with pinch roller on a common carrier and the carrier with a common, with the compression elements in combination standing suction channel is provided. Such double drafting systems are common practice. With the proposed embodiment, a simple and compact solution is obtained with which, in particular, retrofitting and equipping a spinning machine with such compacting devices can be carried out quickly and easily.

 The device is preferably used on a spinning machine.

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

1 shows a schematic side view of a spinning station of a ring spinning machine with a drafting unit and a device according to the invention mounted in compression device.

2 is an enlarged partial view X of Figure 1 with two adjacent drafting units and on a support rotatably mounted compression devices.

3 shows a partial view Y of Figure 2. Fig. 4 is an enlarged, partial perspective view of Figure 1 of the attachment point of the carrier.

5 shows an enlarged partial view of the carrier according to FIG. 1 with a locking device for the carrier.

Fig. 6 is a schematic partial view of FIG. 1 without compression device

7 shows a view Z of the thread suction tube according to FIG. 6

1 shows a schematic side view of a spinning station 1 of 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 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 arm 10. The pressure arm 10 is pivotally mounted about an axis 15 and, as shown schematically, acted upon by a spring element F. This spring can z. 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. 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 somewhat higher than the peripheral speed of the driven roller 3, so that the fiber material supplied to the drafting unit unit 2 is subjected to a preliminary delay in the form of a sliver L between the pair of input rollers and the middle roller pair 5, 6. The main distortion of the fiber L 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. As can be seen from FIG. 2 (view X according to FIG. 1), a pressure arm 0 is assigned to two adjacent drafting unit units 2 (twin drafting system). Since these are the same or partially mirror-inverted elements of the adjacent drafting unit units or compaction 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 each a stationary mounted suction insert 18 is arranged. As can be seen schematically from FIG. 2, the respective suction insert 18 can be held by a carrier 20 in its built-in stationary position via retaining means (not shown). However, it would also be conceivable a solution, wherein the suction insert 18 is firmly connected to the carrier. In Fig. 2, for example, a cover 51 is shown, which may be designed to be pivotable to provide access to the suction drums 17 for cleaning purpose. At the same time could be done with this cover, the fixation of the absorbent inserts. From published DE-0 2005 044 967 z. B. a design with removable suction inserts shown, as well as the formation of a vacuum applied to the suction zone.

As indicated schematically, the respective suction insert 18 on a portion of its circumference on a suction slot S, which extends substantially over the suction zone Z. The respective suction drum 17 is rotatably mounted in the region of its outer end via bearings K on a shaft 22. For axial fixing of the suction drum 17 on the shaft 22, a locking ring 23 is mounted on the shaft, which prevents the axial displacement of the suction drum during operation. Ie. at a distance of the retaining ring 23, it is possible to subtract the respective suction drum 17 easily and in the axial direction of the shaft 22. As a result, a quick replacement of the suction drums 17 is possible, if necessary to exchange them with other suction drums with a different arrangement of the openings Ö in order to increase the compression T / CH2011 / 000280

12 element to convert the processing of another fiber material. In this case, the openings Ö can be mounted in a single-row or multi-row on the circumference of the suction drum 17 or arranged in an offset manner. The removal of the respective suction drum can also be done only for cleaning purposes. The retaining ring can also z. B. be an O-ring made of rubber or a flexible clamping ring. This makes it possible, with the application of a small force, the suction drum 17 with its bearing L by hand in the axial direction of the shaft 22 deducted without the locking ring 23 must be dismantled. This is made possible by an elastic deflection of the O-ring, or the clamping ring. The suction drum is mounted in the reverse direction. Since during operation usually no large axial forces acting on the suction drum 17, it is securely held even in the use of an elastic locking ring 23 in its axial position.

The shaft 22 is mounted in a receptacle 25 of the carrier 20. This can be z. B. with fasteners, not shown (screws) done. The shaft 22 has a somewhat larger diameter in the region of the receptacle 25, while the ends of the shaft 22 extending from this receptacle have a tapered diameter on both sides and serve to accommodate the respective bearings K. The respective suction drum 17 has at its, pointing away from the carrier 20 end in each case an annular projection 16 with an outer diameter D1. On a portion of the outer periphery of the projection 16 is a portion of the inner surface IF of an annular friction wheel 28, wherein the inside diameter of this inner surface IF has a diameter D2. In the position shown in FIG. 3 (view Y according to FIG. 2), the respective suction drum 17 is in a working position, in which the outer circumference U of the friction wheel 28 rests on the outer circumference U7 of the driven output roller 7 via a correspondingly applied pressure load. The end cap 30 has been omitted in this view to better show the ratios of the gear stage. Ie. the friction wheel 28 is driven by friction from the roller 7. The friction wheel 28 likewise transmits the drive to the annular shoulder 16 of the suction drum 7 via friction. This takes place at the point where the inner surface IF intersects with the inner diameter. knife D2 of the friction wheel 28 and the outer circumference AU of the projection 16 with the outer diameter D1 touch or lie on each other. The friction wheel 28 may be made of an elastic solid, such as. B. rubber. In the working position shown in Figure 3, the outer circumference of the suction drum 17 with the diameter DS at a slight distance from the outer circumference of the output roller 7. This is guaranteed if the following dimensional ratios are present: - <- + ().

 2 2 2 2 The respective peripheral speed, or the speed of the suction drum 17 results from the selected diameter ratios D1 to D4. Ie. the transmission ratio between the driven output roller 7 and the respective

Suction drum 17 results from the ratio ^ x- ^. This makes it possible, depending on the choice of diameter ratios, to choose the peripheral speed of the respective suction drum 7 to be greater or smaller than the peripheral speed of the driven output roller 7. In some cases, it is advantageous to choose the gear ratio so that the peripheral speed of the following suction drum 17 is slightly less than the peripheral speed of the output roller. B. a lateral displacement of the fiber material in the region of the suction zone Z above a correspondingly formed suction slot S be compensated. The suction zone Z extends (seen in the circumferential direction of the suction roller 17) approximately between the region where the friction wheel rests on the output roller 7 and the nip P between a pinch roller 33 and the suction drum 7. As can be seen from Figure 2, is in the range of annular projection 16 a cover cap 30 is fixed, which projects beyond the inside diameter D2 of the friction wheel 28 with its outer diameter. The end cap 30 is provided with an annular projection 31 which projects into the inside width of the annular projection 16 of the suction drum 17. The outer dimension of the annular projection 31 is chosen so that it in the position shown in Figure 2 a clamping action within the clear width of the approach 16 exerts. As shown schematically, the annular cap 31 may be provided with additional outwardly projecting cams, which engage for fixing the end cap 31 in circumferential recesses within the clear width of the projection 16. For fixing the end cap 30 in the position shown in Figure 2 a variety of designs is still possible. By the end cap 30, the friction wheel 28 is held in the axial direction on the shaft 22 in its position.

It can be seen from FIG. 2 that two suction drums 17 of adjacent spinning stations are rotatably mounted on the shaft 22 fastened to the carrier 20. Here are the

Suction drums 17 with a respective friction wheel 28 arranged in mirror image with respect to the carrier 20.

Subsequent to the suction zone Z a clamping roller 33 is provided for each of the suction drums 17, which rests on a pressure load on the respective suction drum 7 and forms a nip line P with this. In this case, the respective pinch roller 33 is rotatably mounted on an axis 32 which is fixed to a bearing element 35 which is connected by screws 34 (or other fasteners) with a spring element 36. The spring element 36, via which a pressing force of the pinch roller 33 is generated in the direction of the suction drum 17, is fastened to the carrier 20 via the schematically illustrated screws 37 (or other fastening elements). This fastening point can be designed in such a way (eg by means of oblong holes in the spring element 36), so that the pressing force of the clamping roller 33 on the suction drum 7 is adjustable. The nip P at the same time forms a so-called "anti-rotation nip", from which the fiber is fed in the conveying direction FS in the form of a compressed yarn FK under rotation, to a ring spinning device shown schematically, which is provided with a ring 39 and a runner 40, the yarn A thread guide 43 is arranged between the nip line P and the runner 40. The ring 39 is attached to a ring frame 44, which moves up and down during the spinning process performs. 00280

15

At its end facing the spinning machine, the carrier 20 is provided with a U-shaped or fork-shaped end piece 46 which rests with its inner surface 47 on a partial region of the outer circumference 49 of a suction tube 50 in the mounted position shown in FIG. As can be seen in particular from FIG. 5, the fork-shaped end piece 46 is designed such that the connecting line VL runs between the ends E of the end piece at a distance a from the center axis MA of the suction tube 50. Ie. in the installed position of the carrier 20 shown in Figure 1 and Figure 5 is the distance c between the connecting line VL and a parallel plane to which the inner surface 47 is tangent to the dimension a greater than the radius r of the suction tube 50. This ensures that a clamping action between the inner surface 47 of the end piece 46 and the outer periphery 49 of the suction tube 50 is formed and the carrier is held in this installed position. For installation in this position, the support 20 is pushed onto the suction pipe 50 in the position shown by a semicolon by means of a low pressure force shown in the direction of the arrow. In this case, the material of the carrier 20, at least the material of the end piece 46 is selected such that when Aufsteckvorgang on the suction tube 50, the legs of the tail 46 can yield elastically, after completion of Aufsteckvorgang the inner surface 47 of the end piece 46 completely on the outer circumference 49 of the suction tube 50 rests. The contact pressure between the end piece 46 and the suction tube 50 is selected so that a pivoting of the carrier 20 about the center axis MA of the suction tube 50 is made possible. In order to keep the carrier 20 and the suction drums 17 rotatably mounted thereon with the pinch rollers 33 in a working position in which the respective friction wheels 28 are in driving connection with the output rollers 7 via a pressure force, a respective spring rod 55 is provided on both sides of the carrier provided, which is fastened via fastening elements 56 (eg screws) to the machine frame MR of the spinning machine. At the free end of the respective spring rod 55, a circular rod 58 is attached. As can be seen in particular from FIG. 5, a flat surface 61 of a semicircular rod 60 rests on the circumference of the circular bar 58 in this position. The rod 60 is fixedly connected to the carrier 20 via a web 62. As can be seen schematically from FIG. 2, a semicircular rod 60 extends on each side of the carrier 20 rests in the working position on the rod 58 and assumes a locking position in this position. This locking position can only be solved by applying a corresponding force. This is the case when the compression module V has to be pivoted into a lower dashed line position (FIG. 1). This pivoting is necessary if the access to the drafting system outlet must be exposed for maintenance work or if the compression module itself must be serviced. To hold the compaction module VM in the dashed-line position shown below, a stop 64 attached to the machine frame is provided. In this position, the compression module can also be removed from the spinning machine by manual removal from the suction tube 50. In the described pivoting operation of the compression module VM in a lower position of the respective spring rod 55 differs in the dotted line position, whereby the rod 60 can slide past the rod 58 past. As soon as the rod 60 has passed the rod 58, the spring rod 55 returns to its original position by the action of the spring. When the pivoting of the carrier 20 about the center axis MA upwards, the semi-circular surface of the rod 60 strikes the peripheral surface of the rod 58 and pushes it upon further pivoting in the dashed line position. Once the flat surface 61 of the rod 60 is above the rod 58, this is moved back to the original position due to the spring force of the spring rod 55 and again assumes a locking position with the rod 60, as shown in Figure 5.

Within the carrier 20 extends a suction channel SK, which has an opening S2 on the inner surface 47 of the end piece 46 and a further opening S1, which is arranged in the region of the receptacle 25 and communicates with the inner space 66 of the respective suction insert 18. The opening S2 is in the working position of an opening SR of the suction pipe 50 opposite, whereby the interior of the suction pipe 50 is connected to the suction channel SK. In order to seal off the connection between the opening S2 and the opening SR to the outside, a sealing element DE is provided in the region of the inner surface 47 of the end piece 46, which is placed around the opening S2. In this case, the sealing element DE is designed or attached such that it comes into contact with the mounting of the carrier 20 on the outer circumference of the tube 50 and abuts the connection point between the openings S2 and SR. isolated over the environment. As indicated schematically, a replaceable insert 92 may be provided in the region of the opening S2. This makes it possible, depending on the clear cross-sectional area of the insert 92, to influence the pressure conditions in the compression module. D. h., Depending on the distance of the mounting position of the compaction module on the spinning machine from a stationary vacuum source, a corresponding insert 92 is used to obtain the same negative pressure conditions at all mounted compression modules.

As can be seen from FIG. 1, the suction tube 50 is connected via one or more connecting channels 70 to a central main channel 72. This channel 72 is connected to a vacuum source SP in connection, which can be controlled via a control unit ST. There may also be other connections (not shown) on the suction channel 72, which are connected for the purpose of keeping the spinning machine clean with corresponding suction points.

In order to be able to aspirate the yarn FK delivered further via the clamping point P in the event of a yarn break between the nip line P and the spool 42, a suction tube 75 is fastened to both sides of the carrier 20, whose respective opening 77, which faces the carrier 20, is fastened to the Channel SK is connected. The outgoing from the carrier, outwardly projecting end of the respective suction tube 75 is closed. On a portion of the circumference of the respective suction pipe, an opening 79 is mounted, which points in the direction of the pulled-down yarn FK. Ie. In the event of yarn breakage occurring, the end of the further supplied yarn or yarn is fed via the respective suction tube 75 under the action of the vacuum generated via the vacuum source SP via the suction channel SK to the suction tube 50, which feeds it via the channel or channels 70 for further discharge to a collection point to the main channel 72 emits.

The proposed design of a compaction module also makes it possible to subsequently integrate or grow such a compaction unit on conventional spinning machines without having to install special further drive means (eg additional driven longitudinal shafts). The drive of the suction mel, as well as the drive of the suction drum working together with the pinch roller is simply removed via the integrated friction module on the compression module of the already existing, driven output roller of the drafting unit 2. In other words, no additional longitudinal shafts are to be attached to the spinning machine in order to integrate a device for compressing the sliver on the spinning machine. Each compaction module VM is a closed unit per se and is provided in the proposed version for two adjacent spinning stations. As can be seen from the schematic representation of FIG. 6, a yarn suction pipe 81 fastened to the suction pipe 50 on a suction pipe 50 via fastening means 80 (eg screws) can be removed and exchanged for a compacting module VM. The channel 82 within the suction tube 81 also opens into the opening SR of the suction tube 50. wie z. B. from the view Z (of FIG. 6) can be seen in the figure 7, the Fadenabsaugrohr 81 is provided with a cross tube 85, which is in communication with a central pipe section 83. In order to be able to carry out the thread extraction at two adjacent spinning stations, openings 86, 87 are respectively provided in the region of the two ends of the cross tube 85 and point in the direction of the yarn drawn downwards in each case. At the end of the pipe piece 83, a U-shaped end piece 89 is fixed, which substantially corresponds to the end piece 46 which is attached to the compression module VM. The opening 90 of the pipe section 83, which ends in the region of the end piece 89, is in the installed position of the opening SR of the suction pipe 50 opposite. To seal this connection point, sealing elements can also be provided here, as have been described in the case of the compression module. The other opening 84 is connected to the interior of the cross tube 85. This makes a simple and quick replacement of these two units against each other possible. Ie. the conversion or retrofitting of such a spinning machine to a design with a compression unit is possible in a relatively short period of time. This ensures a universal use of its spinning machine for the spinning mill owner.

It is also possible, using an appropriate color coding of the bobbins, on a single spinning machine to produce partial areas with compacting devices. while at the remaining areas yarns without compaction are produced. Ie. a spinning machine can be used even more universal with this device.

Claims

claims 1. Apparatus for compacting a fiber structure (V) on a spinning machine, by a pair of output rollers (7, 8) of a drafting unit (2) to a besaug- te guide surface of a suction zone (Z), a subsequent, acted upon with suction, driven, circulating Compressing element (17) is discharged, which at least one rotatably mounted pinch roller (33) is assigned to form a nip (P) following the suction zone (Z), characterized in that the compression element (17) and the pinch roller (33) a common carrier (20) are rotatably mounted, which is fastened via fastening means (46) on the spinning machine and the removable, provided with openings (Ö) compression element (17) at least one drive element (28), which in the transfer of the compression element of an out of service position in an operating position with the lower roller (7) of the output roller pair (7, 8) via a load egg means (55, 58) forms a drive connection, wherein the carrier has a suction channel (SK) for the suction air of the compression element (17) and a first end (S1) of the suction channel (SK) is in communication with the compression element and a second end ( S2) of the suction channel (SK) ends in the region of the carrier (20) with which the carrier is fastened in its mounted position on the spinning machine. 2. Device according to claim 1, characterized in that the second end (S2) of the suction channel (SK) of the carrier (20) in the region of a bearing surface (47) of the carrier (20) terminates, with which the carrier in its mounted position abuts an element (50) of the spinning machine. A device according to claim 2, characterized in that the element (50) of the spinning machine to which the carrier (20) is attached is a channel (50) fixed to the spinning machine, which communicates with a source of negative pressure (SP) is and with openings (SR) is provided, which are arranged in the region of the attachment point of the respective carrier. 4. The device according to claim 3, characterized in that the channel (50) facing the end of the suction channel of the carrier (20) is provided with the opening (S2) of the suction channel (SK) set elastic sealing elements (DE), wherein in the mounted and in operative position of the respective carrier the opening (S2) of the suction channel (SK) and the respective opening (SR) of the channel (50) facing the spinning machine and sealing the sealing elements (DE) on the channel (50) rest. 5. Device according to one of claims 3 to 4, characterized in that the channel (50) has a circular cross section and the carrier (20) with a U-shaped end piece (46) is provided, with which it surrounds the circular channel (50) partially in the mounted position. 6. The device according to claim 1, characterized in that between the drive element (28) and the revolving element (17) a gear stage (D1, D2) is provided. 7. The device according to claim 6, characterized in that the drive element is a friction wheel (28), which in the working position on the loading device (55, 58) frictionally in contact with the lower roller (7) of the pair of output rollers (7, 8) is held. 8. Device according to one of claims 6 to 7, characterized in that the peripheral compression element is formed from a suction drum (17). 9. The device according to claim 8, characterized in that the suction drum (17) bearing elements (K), via which it is rotatably mounted on a, on the carrier (20) fixed shaft (22) and mounted on the shaft securing means ( 23) in the axial direction on the shaft (22) is fixable. 10. Device according to one of claims 8 to 9, characterized in that the friction wheel (28) is designed as a symmetrical ring, which with its circular In NEN surface (27) rests on a portion of the peripheral surface (14) of a circular projection (16) which is connected axially parallel to the suction drum (17), wherein the inside diameter (D2) of the friction wheel (28) is greater than the outer diameter (D1) of the approach (6). 11.Vorrichtung according to any one of claims 1 to 10, characterized in that the clamping roller (33) below the compression element (17) is arranged following the suction zone (Z) 12. Device according to one of claims 1 to 11, characterized in that the suction channel (SK) is connected to at least one suction pipe (75) for a thread extraction. 13. Device according to one of claims 1 to 4, characterized in that about an axis (32) rotatably mounted pinch roller (33) via a spring element (36) on the support (20) is fixed, which a bearing receptacle (35) for carries the axis (32) of the pinch roller (33) and generates a clamping force in the region of the clamping line (P) on the compression element (17). H.Vorrichtung according to one of claims 1 to 12, characterized in that the carrier (20) transversely to the axes of rotation (7a, 8a) of the pair of output rollers (7, 8) is pivotally mounted on the spinning machine and holding means (55, 58) the spinning machine are provided which protrude into the pivoting range of elements (60, 62) fastened to the carrier (20) and which limit the pivoting movement of the carrier at least in one pivoting direction. 15. The apparatus according to claim 14, characterized in that the holding means consist of fixed to the spinning machine spring elements (55), via which in a locking position with the, as a bolt (60,62) formed elements of the carrier (20) the drive wheel (28) is held in frictional engagement with one of the rollers (7, 8) of the pair of delivery rollers. 16. The device according to claim 1, characterized in that in the region of the second end (S2) of the suction channel (SK) of the carrier (20) for cross-sectional adaptation exchangeable inserts (92) are provided. 17. Device according to one of the preceding claims, characterized in that the drafting unit (2) is designed as a double drafting system with two adjacent drafting systems with a common loading arm (10) and the respective, the output roller pairs (7, 8) associated with compression elements (17). with clamping roller (33) are rotatably mounted on a common carrier (20) and the carrier is provided with a common suction channel (SK). 18. spinning machine with a device according to one of claims 1 to 17.