EP2122022B1 - Ring spinning machines with device for supplying flames - Google Patents

Description

The invention relates to an apparatus and a method for producing effect yarns / twines on spinning machines, in particular ring spinning machines.

It is known that one can produce programmed yarn thickening on ring spinning machines by specifically changing the distortion of the slivers in the drafting of the ring spinning machines. These effects are also called base flames and consist of continuously drawn single- or multi-colored fiber strands, which have programmable yarn thickening of about 3 to 10 cm. In contrast, supplied flames are differently colored, other fiber material containing thickening in the yarn or twine. A thread consists of at least two carrier yarns, which are twisted together in a device provided for this purpose. Applied flames can be programmed continuously, in variable thicknesses or in start / stop mode. The use of various fiber materials allows a diverse, flexible use of different dyeability according to market needs. Two- and multiple-drafting systems that feed controlled, differently or uniformly distorted fiber strands to one and the same delivery point in the area of a delivery roller pair have already been published in earlier years. Hereinafter, some known from the prior art methods and devices are presented in more detail. As it turns out, all methods are based on devices optimized for this purpose.

Applied flames, which are fed between two and more carrier threads, are also available in effect twisting machines, as used for example for coarse yarn numbers used. Disadvantages are the coarse spindle pitches, the small production units and the missing Faserabsauganlagen, so that these fine yarn (eg yarn numbers NM 30-70) are unsuitable. The production of effect yarns in large quantities is therefore not economically possible.

DE2321762 (henceforth DE'762) was in 1973 in the name of the company Braschler & Cie. and relates to a device for mixing yarns. The device described in DE'762 is due to the same inventor of the invention disclosed below. DE'762 is directed to a device for mixing roving for the production of fancy yarns which does not require a continuous roving. All rovings can be varied equally and it is possible to work with more than two rovings. The apparatus has at least two delivery mechanisms for a respective roving and a common output delivery plant, a guide device for bringing the rovings between the output delivery plant and the delivery mechanisms, a drive device for driving the delivery mechanisms with variable speed, and a control device for the individual control of the drives of the delivery mechanisms. The device is advantageous for the production of effect yarn or effect yarn. It is suitable for installation in spinning or twisting machines. The device is limited to the processing of different rovings. To produce flames in different colors, the rovings are fed by means of a 4-fold drafting system in stacks or at varying speeds. The device has a comparatively complicated structure.

DE4041301 (henceforth DE'301) was deposited in 1990 in the name of Amsler-Iro AG and is due to the same inventor of the invention underlying this patent application. DE'301 relates to a method and apparatus for producing a fancy yarn on a ring spinning machine. In contrast to the prior art, DE'301 discloses a compact, finely adjustable spinning machine for producing effect yarns. The speed variations required for effect yarn production are made possible by servo motors and electronic control. In the DE'301 is suitable for use with the invention disclosed in this application.

DE3206431 was registered in 1982 on behalf of Zinser Textilmaschinen AG and shows a process for producing a fancy yarn. In the inlet of a drafting system, a sliver is wound with at least one filament yarn. This wound sliver is warped by means of a drafting so that the filament yarn is torn. Subsequently, the sliver is wound up with the roving twisted with filament yarn fragments. Subsequently, the twisted roving is warped on a ring spinning machine and turned to effect yarn.

DE707116 was deposited in 1938 in the name of Rudolf Landwehr and concerns an effect twisting machine for the production of effect yarns such as loop, caterpillar or crimped yarns. In the effect twisting machine, two delivery mechanisms arranged one behind the other are used. The rear, slower running mill supplies the ground yarn or threads, while the leading, faster moving mill supplies the yarn (s) destined for loop or rippling. In order to unite the ground threads, which are supplied by the slower moving delivery mechanism, with the threads of the front delivery mechanism, the pressure roller resting on the front delivery mechanism is provided with grooves through which the ground threads of the rear delivery mechanism are passed. The device is designed only for the processing of threads.

DE1149650 was deposited in 1958 in the name of "Hamel, Projektierungs- und Verwaltungs AG" and shows a device for producing effect twists with a large elastic elongation. This is achieved by using elastic material, eg crimped yarn, as the core thread. The soul thread is stretched between two delivery mechanisms. Immediately before or on entering the last delivery plant, one or more threads producing the effect are fed at a uniform or changing speed. To On leaving the last delivery mechanism on the way to the twisting device, the core threads contract due to the reduced tension, so that the desired effect sets in. In connection with FIG. 2 An exemplary embodiment for producing an effect pear with flame effects is described in which three delivery mechanisms are used. Between an initial delivery mechanism and a second delivery mechanism, an elastic core thread is stretched. An additional delivery unit feeds roving, which results in the core thread after leaving it due to the relaxation in a thickening. It is a special device that has not been a commercial success to this day. One problem is that the device is only suitable for the production of the described special yarns.

CH519039 was filed in 1970 on behalf of the Commonwealth Scientific and Industrial Research Organization and discloses an apparatus and method for making a uniform yarn from at least two running slivers. The slivers are fed separately from a feed point to a convergence point and twisted uniformly into a yarn at the point of convergence. A device provided for carrying out the production method has in each case a drafting device for feeding a sliver from a feed point to a point of convergence. The apparatus further comprises means for cyclically varying the path length between the point of convergence and the point of delivery of the slivers. One embodiment essentially consists of a conventional spinning drafting device with multiple drafting means which is arranged so that it can supply a sliver to the rotor of a spinning spindle. However, the spinning drafting system is modified to the effect that there is only one single spindle between each two drafting devices and in the middle between them. Another embodiment has only one drafting system, which is suitable for processing both yarns. The device is not suitable for producing effect yarns with flames. JP11350265 (henceforth JP'265) was deposited in 1998 on behalf of Suzuki Sangyo KK. JP'265 is directed to a spinner suitable for continuously spinning different yarns. According to the published figures, two spools of thread are arranged above a spinning station whose yarn is fed via a selection and delivery part of a spinning station. US 574,941 by CH Richardson in 1987 shows a ring spinning device for making flames. Here, two spaced carrier yarns are supplied via a carrier yarn guide and two laterally juxtaposed drafting systems in front of a pair of rollers each a roving and then spun together.

An object of the invention is a process for the production of effect yarn, resp. Effect ply to show on a ring spinning machine and an apparatus for performing the method.

A further aspect of the invention is to show a device which is suitable for use with existing fully automatic spinning machines, in particular ring spinning machines, with a plurality of spindles (usually up to 1200) and their simple operation, thread guidance and monitoring distinguished.

A further aspect of the invention is to show a device which makes it possible to show finely modified ring spinning machines modified for many variants of niche yarns including base laps, core yarns, core yarns with non-elastic filament, boucle yarns and other twisting effects.

Another aspect is to show a device that leads to thread breaks no problematic Garnanhäufungen, respectively. the affected spinning station is interrupted in a controlled manner.

The object is solved by the invention defined in the independent claim.

A solution of the problem is based on the fact that an effect twist with at least two carrier yarns and thickening (flames) of other fibers by means of a specially designed for respectively. converted ring spinning machine is produced. Ring spinning machines known from the prior art which are suitable for the production of effect yarns have one or more spinning stations, each with a drafting device, which serves to delay a roving yarn or a plurality of rovings. The spinning machines are designed so that the delivery speed of certain areas of the drafting can be changed abruptly, so that the fibers forming the yarn are cumulated in a controlled manner. In order to avoid thinning, partly finds a controlled over-feeding, resp. Dinners take place. If the drafting system no longer supplies fibers, the spinning process is interrupted. By means of a pair of draw-in rollers, roving is withdrawn via deflections from a roving roll and fed to a pair of abutting belts driven pulleys and tensioned by belt guides. As seen in the direction of conveyance, following the belts, there follows a pair of delivery rollers, which receive the stretched roving emerging between the belts and convey a spinning triangle located behind the delivery rollers. In the spinning triangle, the fibers of the roving, which until then have been oriented approximately parallel and stretched against one another, are twisted into a yarn by a metal ring (rotor) rotating on a circular path (ring) about a spindle. The twisted yarn to the yarn are wound onto a plugged onto the spindle spinning sleeve to a cop. In this conventional ring spinning process, the fibers originating from the drafting system form the actual yarn. By the feeding rollers, the belts and the delivery rollers of the drafting system have different conveying speeds, the fibers of the roving are pulled apart uniformly, respectively stretched. In the production of effect yarns, the absolute and the relative conveying speed of the individual areas of the drafting system are influenced so that a discontinuous conveying of the fibers results and thickening in the yarn occurs. With conventional effect yarns, however, the fiber supply is never switched off completely, otherwise the spinning process suffers an interruption.

An effect yarn according to the invention essentially comprises two or more twisted carrier yarns having the same or different properties. If desired, the effect yarn comprises other fibers which are fed between the carrier yarns by means of a drafting system prior to twisting them. These further fibers have a uniform distribution in the longitudinal direction or are present in the form of local thickenings (flames). Further combinations are possible. The supply of the additional fibers is preferably controlled by means of a modified flame-forming device of a ring spinning machine.

The carrier yarns are fed in the region of the spinning triangle to the yarn formation process of a ring spinning station in a defined lateral distance from one another. According to the invention, the carrier yarns are fed to the spinning process via a carrier yarn guiding means and in one embodiment by means of a continuously or discontinuously driven pair of rolls. At the same time, according to a predefined sequence, fibers of a roving are regularly or irregularly processed by means of the drafting system and likewise fed to the spinning process by means of a roller pair. Depending on the field of application and the effect to be achieved, the pair of rollers may be about the draw-off rollers of the drafting system or about another guide means, e.g. a separate pair of rollers or juxtaposed yarn guides act. If necessary, at least one of the rollers has a specially profiled cross section which is suitable for receiving, guiding and / or clamping the carrier yarns. In one embodiment, one of the rollers has two circumferential grooves, which are arranged at a distance from the carrier yarns and serve for non-pressing implementation thereof.

Good results are achieved with comparatively simple carrier yarn guiding devices which, with respect to the running direction of the carrier yarn in the direction of the carrier yarn packages, have one or more loops which serve to receive one or more carrier yarns. The eyelets are preferably formed spirally and slotted, such that the Carrier yarns can be easily introduced together or individually. As seen in the running direction of the carrier yarns, below the eyelet, there is a separator which, in operation, is arranged between the carrier yarns and holds them at a defined distance from each other. If necessary, the separator can be designed so that it is suitable for attaching a sleeve, for example made of ceramic or other suitable material. Through sleeves with different diameters, the distance between the carrier yarns can be easily adjusted. In a further embodiment, the carrier yarn guide device for adjusting the relative distance of the carrier yarns per spinning position on an eccentric. The eccentric can be deflected by rotating about an axis which is approximately perpendicular to the direction of the carrier yarns, in the lateral direction.

In one embodiment of the invention, one or more carrying devices are provided approximately above each drafting system of a ring spinning machine, which are suitable for receiving yarn packages with carrier yarn. The carrying devices are arranged so that they do not conflict with existing elements of the spinning device, in particular the Wanderbläser and the roving bobbins. At least two carrier yarns are each fed to a drafting system in the region of the spinning triangle controlled by means of thread guides. Depending on the field of application, two or more carrier yarns are wound on the yarn packages, which reduces the number of carrier yarn packages required per spinning station to one. If necessary, instead of one or two laterally offset behind, over or juxtaposed spools of thread can be provided with only one carrier yarn, but this is associated with a certain overhead and increased space requirements.

In contrast to conventional ring spun yarns, the fibers supplied by the drafting system generally have no supporting function and are replaced in their function by the carrier yarns in whole or in part. The supplied from the drafting fiber fibers are rather for the production of effects, eg optical type in the form of thickening or for the production of color variations, or for influencing the physical properties of the resulting yarns. In contrast to conventional ring spinning processes, the fiber supply by the drafting system, depending on the effect to be achieved completely or only partially prevented, respectively. off.

In order to avoid that in case of breakage of one of the carrier yarns, an unwanted accumulation of carrier yarn, a control device, resp. a yarn monitoring system, are provided, which automatically interrupts the supply of carrier yarn to the affected spinning station when breaking one of the carrier yarns. In one embodiment, the control device has a rocker held in balance by the carrier yarns, which is operatively connected to a separator. If one of the carrier yarns, which are supplied in pairs per spinning station, breaks, the rocker is deflected so that the supply of the second carrier yarn is also interrupted in a controlled manner by means of the separating device. The control device is also preferably constructed so that the carrier yarns can be easily threaded, e.g. by being introduced from the front to the rear, whereby they are separated by means of a wedge on both sides of the rocker to come to rest. Depending on the embodiment, the control device is designed so that the carrier yarns held in position during a yarn break, but the supply is interrupted, is. Depending on the field of application, however, it is better to arrange the control device so that in case of breakage of one of the carrier yarns the remaining is also separated and the free ends of the carrier yarns are wound onto the carrier yarn. As a result, the risk of malfunction is reduced by the free carrier yarns.

In one embodiment, at least two additional yarn rolls are fed to the process upstream of the delivery rolls by means of yarn guiding and control mechanisms designed according to the invention. The carrier yarns are passed between the delivery rollers and then get into the spinning triangle where they due to the rotation of the rotor and the cop together to one Twisted yarn and then wound up on the cop. Depending on the embodiment, the carrier yarns are primarily conveyed by the driven delivery rollers or other aids. The carrier yarns are aligned and spaced by means of the yarn guides so that fibers supplied by means of the drafting system at least partially reach between the carrier yarns before they are twisted together in a spinning triangle. As a result, the fibers fed into the draw frame in the spinning triangle become part of the resulting thread. Depending on how the fibers are delivered with the drafting system, different effects result. In a continuous feed, for example, results in a thread that consists of the two carrier yarns and the uniformly supplied fibers from the drafting system. The total thickness of the thread results from the thickness of the carrier yarns and the amount of supplied fibers from the drafting system. A change in the amount of fiber supplied by the drafting system results in a yarn having a varying thickness. By an abrupt change in the amount of fiber supplied by the drafting system, flames of different length and configuration can be achieved. It is also possible to interrupt the fiber supply by means of the drafting entirely, so that the resulting yarn consists only of the carrier yarns. Further parameters result from the feed rate and the mass flow. The drafting system itself, which has hitherto served for the actual, primary fiber feed, depending on the yarn to be achieved only a secondary function, for example for the production of yarn effects.

The arrangement and presentation (preparation) of the feed yarns containing the carrier yarns, is arranged below the existing Vorgarnaufsteckung on the drafting system. An impairment of the Wanderbläsers can be avoided. Another advantage is that these components can be installed in this way easily in existing spinning machines without having to be massively changed.

Guide separators position the applied feed bobbins in the longitudinal direction of the carrier cylinder and enable a non-contact parking position relative to the carrier cylinder (s). In one embodiment, one or more carrier cylinders (feed cylinders) positively driven in an adjustable relationship to the delivery rollers of the drafting system carry the carrier yarn packages. The carrier yarn bobbins (feed bobbins) lie along a lateral surface at least in regions directly on at least one carrier cylinder or are in operative connection therewith. For example, For example, the carrier yarn bobbins can rest on two support cylinders arranged one behind the other. Laterally, the original coils are supported and guided by means of guide separators. If desired, the guide separators include further guide means for the carrier yarn packages, e.g. are suitable for receiving an axle, or a stub axle of the carrier yarn package. In one embodiment, two guide separators arranged opposite each other have obliquely or vertically upwardly extending guide grooves approximately radially to the carrier cylinders, which are aligned in the axial direction with respect to one another so that they are suitable for receiving an axis of a carrier yarn package. If necessary, the guide grooves in the rear, facing away from the carrier cylinder, area a saddle surface in which the axis of the carrier coil can be brought into a parking position, so that the carrier yarn spool is no longer in operative connection with the carrier cylinder. The described arrangement of the carrier cylinder represents an aspect for a successful conversion of existing effect yarn spinning machines, since only so a space-saving arrangement is possible.

If required, variable stretching zones can be provided between the carrier cylinder and the delivery rollers of the drafting system, by means of which the tension and the warp of the carrier yarn can be adjusted.

In one embodiment, the tension of the carrier yarn is compensated by the support cylinders upstream, arranged parallel or obliquely to these ironing. The stirrups have an area that during the unwinding of the carrier yarns with these in contact stands. This area of the bracket has approximately the width of a carrier yarn bobbin. In particular, by the brackets are arranged at an angle to the axis of the carrier cylinder, the tension of the carrier yarn is compensated. If desired, the stirrups may be operatively connected to a triggering mechanism by means of which the carrier yarn packages can be lifted from a parked position with a simple movement and brought into the working position. Good results are achieved by the trigger mechanism acting on both sides of the stub axle of the carrier yarn package.

The carrier cylinders are preferably arranged in pairs one behind the other and parallel to the longitudinal direction of the spinning machine (transverse to the spindles). Depending on the machine type, there are the possibilities of designing the carrier cylinder or cylinders so that they extend only over certain areas or over the entire length of the spinning machine.

The carrier cylinders are preferably driven laterally and rotate substantially at a constant speed, which is tuned relative to the conveying speed of the delivery cylinder of the associated drafting equipment or so, so that an optimal supply of carrier yarn is ensured. The drive speed is adjustable within a certain range (e.g., +/- 5%) so that different conditions and yarn tension can be accommodated. If necessary, the carrier cylinders are driven intermittently, whereby the carrier threads in the pair of take-off rollers are not clamped (e.g., roller with circumferential grooves) and the pulling direction of the traveler and the cop causes the trigger. This variant allows loop, knot and Bougleteffekte to produce on ring spinning machines.

The carrier cylinder may also consist of several segments which are operatively connected at their ends. This allows maximum flexibility, eg when retrofitting or when wearing out occurs. Likewise, the support cylinders can be ideally matched to the carrier yarn to be processed.

In one embodiment, the segments of the carrier cylinders are operatively connected by means of connecting elements which simultaneously serve as bearing elements by resting with a rotationally symmetrical outer surface on one or more guide rollers supported with respect to the spinning machine. In order to achieve an increase in traction, the carrier cylinders may have traction-increasing surfaces, e.g. in the form of corrugations or coatings.

In one embodiment, the supply spools are prefilled, i. they contain two or more parallel stored carrier threads. If necessary, it is possible to provide one or more pairs of carrier yarns on a supply spool. Thus, several spinning stations can be operated from only one feed bobbin. This offers the advantage that the number of required carrier yarn spools can be reduced. Another advantage is that very little space is required, so that the device itself is suitable for use on ring spinning machines intended for cotton with a very narrow pitch (distance between individual spinning stations) of around 70 to 82.5 mm. If there is more space, it is possible to use two single carrier yarn bobbins instead of a preformed carrier yarn bobbin. The defined delay between the delivery roller of the drafting system and the at least one feed cylinder controls the desired tension and compensates for voltage fluctuations.

One embodiment has a carrier yarn guide, which is arranged in the region of the take-off rolls. About a holder, the carrier yarn guide is attached to the roving traversing the ring spinning machine. This ensures an optimized synchronization of the carrier yarns and the roving.

A further aspect consists in an active monitoring of the carrier yarns by means of a yarn monitoring system, which is preferably arranged in front of the delivery cylinder. The thread monitoring system checks whether all necessary for the spinning process carrier yarns are effectively present. If one of the carrier yarns is missing, it leads to a discontinuation of the spinning process, for example by also controlling the supply of the remaining carrier yarns in a controlled manner or by means of a drive of the supply reel. A thread monitoring system usually includes a thread sensor and a thread separating device which cooperates between the supply spool and the delivery roller of the carrier cylinder with the carrier yarns. The position is preferably synchronized with the fiber material flow in such a way that the integration of the fiber material supplied by means of the drafting system of the spinning machine is optimized, eg to form a flame.

A mechanical embodiment of the yarn sensor works with the thread bias. About a biased by a spring rocker which can be deflected equally symmetrical to the left and to the right, the presence of the threads is controlled by the threads hold the rocker in a central position due to their bias. Now missing one of the two carrier threads, the bias of the permanent thread is sufficient that the rocker is deflected so that the remaining thread is interrupted. Without carrier threads it is ensured that no wrong yarn is spun. If necessary, the center position of the rocker can be ensured by means of suitable centering elements in a defined manner until reaching a certain deflection force. In one embodiment, this is achieved by means of a magnet which exerts a force on the rocker in the center position which is sufficiently large that the rocker does not deflect uncontrollably even in the case of vibrations or vibrations. The size of the force can be adjusted in this embodiment, for example by means of the distance between the magnet and rocker. A thread sensor according to the invention is preferably characterized by a simple threadability. Alternative embodiments are possible. An essential aspect is the easy threading of the carrier yarns on the running spinning machine.

If necessary, a carrier yarn guiding device is arranged in the range of the take-off rolls in distance and / or alignment finely adjustable. Depending on the embodiment, it is iridescent (laterally deflecting) on the roving traversing or fixed with respect to the delivery rollers.

A supply of the effect-forming fibers preferably takes place via a modified basic flame plant. This contains a programmable controller for the desired types of flame shapes and flame sequences. A feature consists in an adapted feed movement of the drafting system by means of adapted ramp during startup and braking. Conveniently, the feed is accelerated in the beginning and after the flame formation is not only braked the food tractor, but also turned back a bit to residual fibers that are not carried along with the tip in the delivery cylinder Klemmpunktes between the flames unintentionally and thus cause fiber contamination. As it has been shown, the operation of the spinning machine in normal production mode (running state) for normal spinning is well feasible. For the "Injected Slub" operating mode, there are two components which must be treated individually, shut down per spindle and individually pieced together again. In particular, in thread breakage and remedy the same problems in three and four-cylinder spinning machines can occur during operation, since the pendulum carrier for two spindles simultaneously sets under pressure, individual pressure rollers are not lifted. One aspect of the invention is based on remedying this problem. A special delivery cylinder (pressure roller) contains on both sides of the pendulum carrier a lift-off device, e.g. in the form of an eccentric support roller, which in the activated state, the pressure roller lifts individually, while the second pressure roller can continue to operate in the correct position. This achieves the goal that all running processes can be interrupted per spindle.

The components of a fancy yarn device according to the invention, which are typically not part of a commercially available ring spinning device, as described, are suitable for this purpose in the form of a kit for converting a commercially available ring spinning machine. Such a kit essentially includes a carrier yarn holder for receiving at least one carrier yarn bobbin per drafting unit of a spinning station. The kit further includes a carrier yarn guide adapted to the carrier yarn holding device for feeding at least two carrier yarns spaced apart from one another in the region of a pair of rolls arranged in front of a spinning triangle. The carrier yarn guide of the kit may have an inner guide, which serve to deflect the carrier yarns in front of the spinning triangle. Depending on the field of application and ring spinning machine, the inner guide can be designed as a roller, bow or eccentric or as an element with an E-shaped cross section. In one embodiment of the kit, the carrier yarn holder has a support cylinder rotatably driven about its longitudinal axis and arranged in the longitudinal direction of the ring spinning machine, which is in operative connection with at least one carrier yarn bobbin of a spinning station during the spinning process. The carrier cylinder is in this embodiment during the spinning process with a lateral surface of the carrier yarn in operative connection. Other embodiments are possible. If necessary, a lift-off device is present per carrier yarn bobbin, which serves for temporarily interrupting the operative connection between the carrier yarn bobbin and the carrier cylinder by decoupling the carrier yarn bobbin from the drive. The lift-off device can be arranged rotatably about the carrier cylinder or another axis. In one embodiment, it has a crescent-shaped cross section. By the support cylinder of several normalized segments whose ends can be operatively connected directly to each other or via intermediate elements, the length can be adjusted flexibly on different ring spinning machines. The intermediate elements can serve as part of a non-rotating bearing. In one embodiment of the kit, the carrier yarn holder per carrier yarn on two spaced guide separators, which are arranged substantially perpendicular to a support cylinder, such that between each at least one carrier yarn can be arranged at least temporarily with at least one carrier cylinder during operation along a Generatrix is in operative connection. The guide separators may comprise guide means in the form of grooves adapted to receive an axle serve a carrier yarn spool and are arranged radially to a support cylinder. The carrier cylinder can serve to drive carrier yarn packages of several spinning stations.

If necessary, it is possible to wind on a carrier yarn spool several pairs or groups of carrier yarns. As a result, the number of carrier yarn rolls can be reduced, respectively several spinning stations can be operated simultaneously from one carrier yarn roll. However, in this embodiment, problems may arise in breaking a carrier yarn. For winding the plurality of pairs or groups of carrier yarns, a corresponding adapted winding device is provided, which is equipped with a winding head which makes it possible to wind the required number of pairs or groups of carrier yarns on a carrier yarn bobbin. If necessary, the winding head is designed so that the plurality of carrier yarns are adjustable in their distance relative to each other.

Fig. 1

eine erfindungsgemäss modifizierte Ringspinnmaschine von vorne;

Fig. 2

die Ringspinnmaschine gemäss Figur 1 in einer Seitenansicht;

Fig. 3

die Ringspinnmaschine gemäss Figur 1 in einer perspektivischen Darstellung;

Fig. 4

eine Trägergarnführungs- und Überwachungsvorrichtung von vorne in drei Positionen;

Fig. 5

die Funktion einer Trägergarnführungs- und Überwachungsvorrichtung;

Fig. 6

eine weitere Ausführungsform mit einer vereinfachten Fadenführungsvorrichtung von schräg vorne und oben;

Fig. 7

Detail D aus Figur 6;

Fig. 8

eine weitere Ausführungsform einer Ringspinnmaschine;

Fig. 9

einen Ausschnitt aus der Ringspinnmaschine gemäss Figur 8;

Fig. 10

Details aus der Ausführungsform gemäss den Figuren 8 und 9 in einer perspektivischen Darstellung;

Fig. 11

Details aus der Ausführungsform gemäss den Figuren 8 und 9 in einer Seitenansicht;

Fig. 12

eine weitere Ausführungsform von schräg oben;

Fig. 13

die Ausführungsform gemäss Figur 12 von schräg unten;

Fig. 14

Detail E aus Figur 13;

Fig. 15

eine weitere Ausführungsform mit L-förmigen Halterungen;

Fig. 16

zwei L-förmige Halterungen;

Fig. 17

eine erste Trägergarnführungsvorrichtung;

Fig. 18

eine zweite Trägergarnführungsvorrichtung.

Embodiments of the invention will be explained in more detail with reference to the following figures. It shows schematically and simplified:

Fig. 1

an inventive modified ring spinning machine from the front;

Fig. 2

the ring spinning machine according FIG. 1 in a side view;

Fig. 3

the ring spinning machine according FIG. 1 in a perspective view;

Fig. 4

a carrier yarn guiding and monitoring device from the front in three positions;

Fig. 5

the function of a Trägergarnführungs- and monitoring device;

Fig. 6

a further embodiment with a simplified thread guiding device obliquely from the front and top;

Fig. 7

Detail D off FIG. 6 ;

Fig. 8

another embodiment of a ring spinning machine;

Fig. 9

a section of the ring spinning machine according FIG. 8 ;

Fig. 10

Details of the embodiment according to the FIGS. 8 and 9 in a perspective view;

Fig. 11

Details of the embodiment according to the FIGS. 8 and 9 in a side view;

Fig. 12

a further embodiment obliquely from above;

Fig. 13

the embodiment according to FIG. 12 from diagonally below;

Fig. 14

Detail E off FIG. 13 ;

Fig. 15

another embodiment with L-shaped brackets;

Fig. 16

two L-shaped brackets;

Fig. 17

a first carrier yarn guiding device;

Fig. 18

a second carrier yarn guiding device.

FIG. 1, FIG. 2 and FIG. 3 show a drafting 3 of a spinning station 2 of an inventive ring spinning machine 1 from the front ( FIG. 1 ), in a side view ( FIG. 2 ) and in a perspective view ( FIG. 3 ). A ring spinning machine 1 usually has a Variety of juxtaposed spinning stations 2, each with one or typically two spindles of the type described above (not shown in detail). The spinning stations 2 are equipped with a corresponding number of drafting units 3, which normally serve in ring spinning as the only supply of the fibers to be processed. The function of the drafting units 3 is completely changed in the invention, however, by being used primarily for effect generation and are no longer the primary fiber suppliers.

The drafting unit 3 shown has a symmetrical structure with paired first and second feed rollers 4, 5, which are driven by a first drive shaft 6. The second feed rollers 5 are arranged on both sides on a boom 7 and are pressed by this during the spinning by means of spring force against the first feed rollers 4. The drafting system 3 also has in each case a pair of first and second delivery rollers 8, 9, through which the fibers to be processed normally leave the drafting system before they are spun. The first pair of delivery rollers 8 is driven by means of a second drive shaft 10. The second pair of delivery rollers 9 are indirectly driven by the first delivery rollers 8 by also being pressed against the first delivery rollers 8 by means of the delivery arm 7. If necessary lifting devices, for example in the form of a wedge, an eccentric or a lever mechanism, provided by means of which the second delivery rollers 9 individually temporarily can be lifted from the first delivery rollers 8 during which the opposite roller remains operatively connected. Between the feed rollers 4, 5 and the delivery rollers 8, 9 driven by a third drive shaft 12 first belt 13 and on the first belt 13 passively driven second belt 14 are arranged. The second belts 14 are also arranged on the boom 6, which presses them elastically against the first belts 13 during the spinning operation. The first belts 13 are clamped by first belt rollers 15 and a first belt guide 16 having a substantially triangular cross-section here. The second belt 14 are in its rear region (trailing) by passively driven second Belt rollers 18 deflected, which are also arranged on the boom 7. In the front area they are spanned by second belt guides 19, which are also arranged on the boom 7. The belt guides 16, 19 are designed so that they press the belts 13, 14 in spinning operation against each other. In the illustration shown, the components occurring in pairs are arranged symmetrically to the boom 7, but are partially covered by this and are therefore only visible individually.

Above the drafting units 3 two Vorgarnrollen 20 are arranged side by side in the embodiment shown, from which roving 21 unwound and deflections 22 the drafting 3 via the feed rollers 4, 5 are fed. The Vorgarnrollen 20 are usually above the drafting 3 on stands, resp. Attachment stands (cf. FIGS. 8 and 9 ) mounted vertically hanging.

Between the drafting units 3 and the Vorgarnrollen 20 is a carrier yarn holder 30 can be seen, which serves to receive wound on carrier yarn bobbins 31 carrier yarn 32. The carrier yarn bobbins 31 are prefolded. This means that two or more carrier yarns 32 are wound parallel to each other per carrier yarn package 31, so that fewer rolls are required. In the embodiment shown, the carrier yarn holder 30 comprises two support yarn cylinders (carrier yarn shafts) 33 which are driven in rotation about their longitudinal axis and are arranged one behind the other parallel to the machine longitudinal direction (y direction). These carrier yarn shafts 33 advantageously extend over a plurality of spinning stations and thus drive a plurality of carrier yarn packages 31 simultaneously. The carrier yarn packages 31 are in operative connection with the carrier yarn shafts 33 at least during the spinning operation. As a result of the rotation of the carrier yarn shafts 33, the carrier yarn packages 31 are driven at a constant peripheral speed so that carrier yarn 32 is delivered at a suitable speed and controlled tension. The carrier yarn shafts 33 simultaneously prevent unwanted overfeed and serve to control the tension of the carrier yarns 32. If necessary, the drive of the carrier yarn shaft 33 is designed so that the relative conveying speed of the carrier yarn with respect to the spindle speed, respectively, the (average) speed of the delivery rollers 8, 9 in a certain tolerance range, eg + 5% to -5% is adjustable. In the embodiment shown, the carrier yarn shafts 33 serve as a deflection for the carrier yarns 32, which are unwound from the carrier yarn bobbins 31 and fed to the spinning process via the delivery rollers 8, 9 of the drafting system 3 in front of a spinning triangle 50. If necessary, the carrier yarn shafts 33 have a traction-increasing surface, for example in the form of a corrugation or a coating, so that a uniform delivery of the carrier yarns 32 is ensured.

As seen in the axial direction, guide separators 34, which define the axial position of the carrier yarn bobbins 31 with respect to the carrier yarn shafts 33, are located on both sides of the carrier yarn bobbins 31. The guide separators 34 have slot-shaped openings 35, which are arranged substantially radially to a carrier yarn shaft 33 at an angle α and suitable for guiding a bearing shaft 36 of a carrier yarn bobbin 31. The carrier yarn shafts 33 generally extend over a plurality of spinning stations and are suitable for simultaneously driving a plurality of carrier yarn bobbins 31. The guide separators 34 have in the region of the rear end of the slot-shaped openings 35 a saddle 37 which is suitable for receiving the bearing shaft 36 of a carrier yarn bobbin 31 is, so that the carrier yarn spool 31 is no longer in operative connection with the Trägergarnwelle 33 (rest position).

One of the in the Figures 2 and 3 shown carrier yarn coils 31 is in this rest position (see. FIG. 2 right), the other is in operative connection with the Trägergarnwelle 33 (see. FIG. 2 Left).

As in FIG. 2 and 3 As can be clearly seen, the carrier yarns 32 are pulled off the carrier yarn spools 31 around the carrier yarn shafts 33. The embodiment shown has for each side of the drafting 3 a separate carrier yarn coil 31, each with two parallel wound Carrier yarns 32 on. Each carrier yarn bobbin 31 is associated with a driven carrier yarn cylinder 33, which supports the carrier yarn bobbin 31 along a surface line and doses the delivery of the carrier yarn 32. The carrier yarn shafts 33 are mounted substantially at the same height one behind the other in the embodiment shown (x-direction). The carrier yarn 32 of the carrier yarn bobbin 31 arranged in the rear in the x direction serves to supply the right spinning station and the carrier yarn 32 of the carrier yarn bobbin 31 arranged in front serves to supply the left spinning station (cf. FIG. 3 ). The holding device 30 for the carrier yarn bobbins 31 is designed so that it can be retrofitted with as little effort in an existing ring spinning machine, without affecting their function negative. Another arrangement and storage of the carrier yarn spool 31 leads to a much more complicated structure and thereby to an increase in the cost of the device.

Depending on the embodiment and field of application, it is possible to provide a single carrier yarn shaft instead of two separate carrier yarn shafts. The carrier yarn shafts 33 of the illustrated embodiment rotate in opposite directions (FIG. FIG. 2 left side: counterclockwise; FIG. 2 right side: clockwise). After the carrier yarns 32 have been withdrawn from the carrier yarn packages 31 around the carrier yarn shafts 33, they are fed to a carrier yarn guiding device 38. The carrier yarn guiding device 38 is a simple yarn guide or, as shown here, a yarn guiding and monitoring device 38, depending on the field of application. If necessary, further yarn guides are provided. The monitoring device 38 serves to ensure that in spinning always both carrier yarns 32 are present by being designed so that in case of breakage of one of the carrier yarns 32 and the supply of the other carrier yarn 32 is interrupted. The carrier yarn guiding device 38 is designed so that the carrier yarns 32 in a fiber delivery region 52 at a defined distance a (see. FIG. 4 ) are fed to each other in the spinning process. The carrier yarn guide device 38 may be formed so that the distance a can be adjusted.

FIG. 4 shows detail C. FIG. 3 in an enlarged view. Evident are the drafting 3 with the feed rollers 4, 5, the delivery rollers 8, 9 and the belt 13, 14 arranged therebetween. In each case the upper, passively driven feed rollers 4, delivery rollers 9 and belt 14 are attached to the upwardly pivotable boom 7. The Garnführungs- and monitoring device 38 is mounted in the embodiment shown by means of a bracket 40 on a laterally deflectable Traversierschiene 41 by means of the yarn guide device 38, and arranged behind the drafting 3 Vorgarnführung (ceramic guide) 24, laterally reciprocally ( schematically represented by arrows F). As a result, uneven wear of the delivery rollers 8, 9 counteracted. If necessary, the yarn guide devices 24, 38 may also be fixed. The Taversierschiene 41 is a holder, which is arranged behind the drafting systems usually runs parallel to the machine longitudinal direction. The function of the yarn guiding and monitoring device 38 is described in FIG. 5 explained in more detail. A yarn 22 of the type according to the invention typically has at least two carrier yarns 32 twisted together, between which further fibers 21 are braided from the drafting system 3. The further fibers 21 may be incorporated in the form of flames 23 (local thickenings) or continuously.

For the production of boucle yarns, the carrier yarns can be decoupled from the take-off rolls by providing the take-off rolls with tangentially circumferential grooves (not shown in detail) in which the carrier yarns 32 are arranged. The circumferential grooves reduce local traction. In order to reduce the friction and to allow a relative movement easily, the inner surfaces of the grooves may be provided with a friction-reducing coating. Alternatively or in addition, separate rollers can be arranged in the grooves, which can be rotated independently of the take-off rolls. In this case, the carrier yarn guides 38 are arranged rigidly and not deflected laterally or the take-off rolls 8, 9 deflected together with the traversing rail.

FIG. 5 shows a mechanical Trägergarnführungs- and monitoring device 38 according to the invention in a front view (x-direction). The illustrated embodiment is constructed so that the carrier yarns 21 can be quickly and easily fed from the front along a first and a second fiber guiding portion (fiber guiding path) 51. Especially in ring spinning machines with large spindle numbers, this is particularly relevant for economical operation. The carrier yarn guiding device 38 is constructed so that the carrier yarns 32 are discharged at a defined distance a. The guide device can be constructed so that the distance a is adjustable.

Depending on the field of application of the device, an active monitoring of the carrier yarns 32 by means of a yarn monitoring system 38 is important so that, in the event of breakage of one of the carrier yarns 32, the remaining carrier yarn is no longer conveyed and leads to a disruption of the spinning process. The thread monitoring system 38 checks whether all necessary for the spinning process carrier yarns 32 are effectively present. If one of the carrier yarns 32 is missing, it leads to a discontinuation of the spinning process by also controlling the supply of the remaining carrier yarns 32 in a controlled manner and returning them to the associated carrier yarn package. A thread monitoring system usually includes a thread sensor and a thread separating device which cooperates between the supply spool and the delivery roller of the carrier cylinder with the carrier yarns. The position is preferably synchronized with the fiber material flow in such a way that the integration of the fiber material supplied by means of the drafting system of the spinning machine is optimized to form a flame. The illustrated mechanical embodiment of the yarn sensor 38 operates with the bias of the carrier yarns 32. The yarn sensor 38 has a base plate 44 and a means of a spring (not visible) biased about an axis 42 rotatably mounted rocker 43. Since the rocker 43 to the left ( FIG. 5b ) and to the right ( FIG. 5c ) can be deflected equally symmetrically, the presence of the carrier yarns 32 is controlled by the carrier yarns 32 due to their bias the rocker 43 in a middle position ( FIG. 5a ) hold. Missing now, as in the FIGS. 5b and 5c shown one of the two carrier yarns 32, the bias of the remaining carrier yarn is sufficient that the rocker 43 is deflected so that the remaining thread is interrupted. In the embodiment shown here, the rocker 43 has cutting blades 44 which separate the carrier yarns 32. By interrupting the carrier yarns 32 ensures that no wrong yarn is spun. If necessary, the center position of the rocker 43 can be ensured by means of a suitable centering element in a defined manner until reaching a certain deflection force. In one embodiment, this is achieved by means of a magnet which exerts a certain force on the rocker in the center position, which is sufficiently large that the rocker does not deflect uncontrollably even in the case of vibrations or vibrations. The size of the force can be adjusted in this embodiment, for example by means of the distance between the magnet and rocker.

The FIG. 6 shows a further embodiment of an inventive ring spinning machine 1 obliquely from the front and top. FIG. 7 shows detail D. FIG. 6 , For the general description is on the FIGS. 1 to 4 directed. In contrast to the embodiment according to the FIGS. 1 to 4 has the in the FIGS. 6 and 7 variant shown on a simplified carrier yarn guiding device 45, which consists of a guide member 46 with two side by side arranged Trägergarnführungskanälen 47, 48. The guide element is formed in one piece here and has a substantially E-shaped cross-section. If desired, the carrier yarn guide device 46 is configured such that the distance between the carrier yarn guide channels 47, 48 is adjustable. If one of the carrier yarns 32 breaks, the yarn feed is not interrupted. As a result, usually only robust carrier yarns can be processed that do not break. Otherwise, time-consuming manual checks are necessary. The carrier yarn guiding device 46 is fastened to the traversing rail 41 via the holder 40 and is moved back and forth in the y-direction during operation in order that the delivery cylinders 8, 9 are not worn unevenly. The guide element 46 is arranged on a base 49, which preferably consists of plastic. The base is designed to be flexible and can be easily mounted on the bracket 40, for example by clipping or clamping. The carrier yarn guide device 46 is preferably made of an abrasion-resistant material, such as ceramic or hard metal. The device can be further simplified if the carrier yarn guide device 46 is not arranged on a traversing rail 41 but fixed.

The FIGS. 8 shows a section of a further embodiment of an inventive ring spinning machine 1 with several juxtaposed spinning stations 2. Die FIGS. 9, 10 and 11 show parts and sections of the device according to FIG. 8 , In FIG. 9 are the Trägergarnhaltevorrichtung 30 and a part of the drafting 3 to recognize, including the drive shafts 6, 10, 12 and the support rod 11 of the boom 7. Die FIGS. 10 and 11 show a carrier yarn bobbin 31 between two guide separators 34 above two carrier cylinders 31 in a perspective view ( FIG. 10 ) and in a side view ( FIG. 11 ).

How out FIG. 8 As can be seen, the ring spinning machine 1 with respect to the yz plane has a symmetrical structure. The arrangement of the carrier yarn coils containing the carrier yarns 31, is arranged below an existing Vorgarnaufsteckung 25 with Vorgarnrollen 20 on the drafting 3. An impairment of a moving in the longitudinal direction (y-direction) along the ring spinning machine 1 Wanderbläsers (not shown) is avoided. Another advantage is that these components can be easily installed in this way in the existing ring spinning machines 1, without having to be massively changed.

One or more, in an adjustable ratio to the delivery rollers 8, 9 of the drafting 3 positively driven carrier cylinder (feed cylinder) 33 carry the carrier yarn coils 31 for the carrier yarns. The carrier cylinders 33 are preferably in pairs one behind the other and parallel to the longitudinal direction (y-direction) of the ring spinning machine 1 (transverse to the spindles) arranged. As can be seen, the carrier cylinder 33 extend substantially over the entire length of the ring spinning machine 1, which allows a simple, inexpensive construction. Each two carrier cylinders 33 arranged spaced apart one behind the other serve to receive carrier yarn bobbins 31 by resting on the carrier cylinders along a surface line. Guide separators 34 arranged vertically between the carrier yarn bobbins 31 (xz plane) position the loaded carrier yarn bobbins 31 in the longitudinal direction (y direction) and prevent them from being touched. The guide separators have here on both sides substantially radially arranged guide grooves 35 which are suitable for receiving a bearing shaft (axis) 36 of a carrier yarn bobbin 31. The guide grooves 35 extend obliquely upwards here. The guide grooves 35 have in the rear region a saddle 37 which serves to receive the bearing shaft 36 of the carrier yarn reel 31 in a rest position in which the carrier yarn reel 31 is no longer in operative connection with the carrier cylinder 33. The support cylinders 33 are preferably driven laterally by a drive means (not shown in detail) in opposite directions and rotate substantially at a constant speed, so that a uniform supply of carrier yarn to the spinning units 2 is ensured. In order to achieve an increase in traction, the carrier cylinder 33 here has a traction-increasing surface in the form of corrugations. If necessary, the bobbins are prefilled. This offers the advantage that the number of required carrier yarn spools can be reduced. One advantage is that the arrangement of the carrier yarn bobbins 31 requires very little space, so that the device itself is suitable for use on ring spinning machines intended for cotton with a very narrow pitch (distance between individual spinning stations) of around 70 to 75 mm. The structure of the drafting 3 essentially corresponds to that of FIGS. 1 to 4 and we therefore do not explain again.

Each carrier yarn package 31 is associated with a driven carrier yarn shaft 33 which supports the carrier yarn package and dispenses the delivery of the carrier yarn (not shown). The carrier yarns are pulled off the carrier yarn bobbins 31 around the carrier yarn shafts 33 and a carrier yarn guiding device 38. The carrier yarn guiding device 38 is a yarn guiding and monitoring device 38 which ensures that all the required carrier yarns are present in the spinning operation by being designed such that, if one of the carrier yarns breaks, the feed of the other carrier yarn is also interrupted. In certain applications, it can be used instead of a simple carrier yarn guide. The Garnführungs- and monitoring device 38 is mounted in the embodiment shown by means of a bracket 40 on a laterally deflectable Traversierschiene 41 by means of the yarn guide device 38 and arranged behind the drafting 3 Vorgarnführung side (y-direction) can be moved back and forth (others Depending on the field of application, embodiments are possible), so that uneven wear of the delivery rollers 8, 9 is avoided.

As in particular from FIG. 9 shows, between each two carrier cylinders 33, a longitudinal member 29 (here designed as a rail), on which the guide separators 34, for example, by attaching, are attached. The carrier cylinder 33 here consist of segments 54 of an extruded aluminum profile, which are operatively connected (plugged) at their ends by means of connecting elements 55. The connecting elements 55 simultaneously serve for the rotationally free mounting of the carrier cylinder 33 with respect to carriers (cantilevers) 56 and for transmitting the drive torque. The carriers 56 are arranged at regular intervals (only one can be seen here) corresponding to the length of the segments 54 on the rotor spinning machine 1. In the embodiment shown, the connecting elements 55 are designed as injection-molded parts, which mesh with the profile of the segments 54 in a form-fitting manner, at least in regions, in order to transmit the drive torque. The connecting elements 55 serve at the same time as a bearing means of the carrier cylinder 33. For this purpose, they have an outer bearing surface 58, which rest in designated bearing points 59 of the carrier 56. The bearings are in the embodiment shown to openings in the upper region of the carrier 56 in which rollers (not visible) are arranged. If necessary, the drive of the carrier cylinder 33 may be integrated into the carrier 56.

From the FIGS. 10 and 11 shows how the here designed as an injection molded part Führungsseparatoren 34 are arranged on the side rail 29 and secured by means of a clamping connection 39 at any point. It is also easy to see how the bearing shaft 36 of the carrier yarn spool 31 are arranged in the substantially radially extending to a support cylinder 33 guide grooves 35 so that the carrier yarn roll 31 rests with its jacket on the support cylinder 33. Lifting devices 57 can be seen between the guide separators, by means of which the operative connection between a carrier yarn bobbin 31 and a carrier cylinder can be temporarily stopped temporarily, without the carrier yarn roll 31 having to be raised in its rest position in the saddle 37. The lift-off 57 consist here designed as half shells made of plastic with a substantially crescent-shaped cross-section. The lift-off devices 57 are clipped onto the carrier cylinder 33 and can be moved by means of a shift lever 58 about the carrier cylinder 33 from a first to a second position. In the first position, the carrier yarn roll 31 is in operative connection with the carrier cylinder 33. In the second position, the region of the lift-off device 57 with the crescent-shaped cross-section is at least partially pushed under the carrier yarn reel 31 so that it is no longer in engagement with the rotating carrier cylinder 33.

The FIGS. 12 and 13 show a further embodiment of a ring spinning machine 1 obliquely from above ( FIG. 13 ) and diagonally below ( FIG. 12). FIG. 14 shows detail E. FIG. 13 , The ring spinning machine 1 largely corresponds to the ring spinning machines 1 of the preceding embodiments according to the FIGS. 1 to 11 so that reference is made to the general description. In contrast to the preceding embodiments, the embodiment shown here has a carrier yarn guide 60, which the carrier yarns 32 in a mutually defined distance a in the direction behind the delivery rollers 8, 9 of the drafting system 2, in the region of an exit point of the roving 22 from the drafting system 2, the spinning triangle 50 perform. If necessary, the carrier yarn guide 60 is designed so that the distance a is adjustable. The roving guide 60 is here operatively connected to the traversing rail 41 via a holder 61 and is deflected by means of this periodically laterally (y-direction), such that the rollers of the drafting system 2 are not unilaterally worn. Depending on the application, it may be fixed. The illustrated carrier yarn guide 60 has an outer guide 62 and an inner guide 63. The outer guide 62 directs the carrier yarns 32 around the drafting system 2 around and the inner guide 63 is the actual supply to the spinning triangle 50. The inner guide 63 is formed here as a bracket which is arranged about an axis 64 via an adjusting screw 65 in angle and orientation adjustable. The inner guide 63 can also be a ceramic element or rolls, for example one or more rolls with or without circumferential grooves. If necessary, the inner guide 63 is designed so that the distance between the carrier yarns is adjustable, for example by the inner guide 63 having two separate guide means whose distance a is variably adjustable. The illustrated bracket has the advantage that it can be threaded very easily and quickly. Alternatively or in addition, guide means with a substantially E-shaped or another cross-section may be used. The outer guide 62 is also arranged on the axis 64. At least the inner guide 63 has an essentially E-shaped cross section on which serves to guide the carrier yarns. In the embodiment shown, the inner guide 63 is arranged hinged about the axis 64. If required, in the area of the carrier yarn guide 60, an active yarn monitoring device (eg according to FIG FIG. 4 ), which interrupts the Trägergarnzufluss controlled at a fraction of one of the carrier yarns 32. In the embodiment shown, more than two carrier yarns 32 can be processed relatively simply per spinning station 2, if required. For this purpose, the carrier yarn guide 60 may need to be adjusted.

In the FIGS. 12 and 13 a drive 70 of the carrier yarn cylinder 33 of the carrier yarn holding device 30 is shown. Each of the carrier cylinders 54 is operatively connected to a pulley 71, which are driven in opposite directions via a belt 72 by a motor 73 here. The carrier yarn holding device 30 can be easily converted to accommodate alternative disk spools (not shown in detail) by removing the guide separators and placing the belt 72 around the pulleys 71 so that they are driven in unison. The carrier threads or filaments can then be placed in the form of disc coils very easily with their lateral surface on the carrier yarn cylinders 33 and driven by them.

FIG. 15 shows a further embodiment of an inventive ring spinning machine 1. To recognize two drafting 70, which are laterally spaced from one another on a drafting device retaining rail 69 are arranged. Between the drafting units 70 two here substantially L-shaped brackets 71 are arranged at the front end of each a carrier yarn guide device 72, 73 laterally adjustable (y-direction) is mounted. Normally, identical carrier yarn guiding devices are used on both sides. In the example shown, however, two different embodiments 72, 73 are shown. The brackets 71 are pivotally mounted at their rear end to a base 74. FIG. 16 shows the L-shaped brackets 71 with the Trägergarnführungsvorrichtungen 72, 73, and the base 74 in an enlarged view. The holder 71 in the right half of the picture is shown folded up by way of example, so that the view of the underlying elements is better possible. The base 74 is in turn attached to a clamp 75 by means of which, depending on the embodiment, it can be attached to the traversing device or to another region of a rotor spinning machine (not shown). In the rear region of the clamp 75 here a support 67 in the form of a rotatable roller 68 is arranged, which helps with heavy carriers or one-sided load to absorb the moment.

Also visible is a forwardly extending approximately T-shaped ridge 76 which, in the illustrated embodiment, has at its forward end a laterally extending transverse bar 77 which in turn serves to receive two roving guide elements 78. The arms 77 engage with the Vorgarnführungselementen 78 between the rollers of the drafting 70 (see. FIG. 15 ), where they optimally align the roving with respect to the carrier yarn guiding devices. If required, both the roving guide elements 78 and / or the carrier yarn guide devices 72, 73 are designed to be adjustable relative to their holders 71 in the transverse and / or longitudinal direction. The Vorgarnführungselemente here have an upwardly open, V-shaped guide channel 79. Other embodiments are possible.

FIG. 17 shows a carrier yarn guiding device 73 in an enlarged view. The carrier yarn guiding device 73 has an approximately C-shaped base 80 here, on which a spiral-shaped eyelet 81 is attached in the upper region. Below the eyelet 81, a multiply bent guide rod 82 is arranged, which engages in the spinning operation between two carrier yarns and these laterally spaced from each other. The lateral distance can be adjusted by the thickness of the guide rod 82. In one embodiment, the guide rod 82 is straight and suitable for receiving sleeves (not shown) with different outer diameter. The sleeves are advantageously made of an abrasion resistant material. The carrier yarns are passed through the eyelet 81 and then passed on each side of the sleeve, so that the diameter of the sleeve determines the relative distance of the carrier yarns to each other. The carrier yarn guiding device 73 is preferably made of metal or plastic. Depending on the number and arrangement of the carrier yarns more than one guide rod 82 may be provided. The embodiment shown can be inexpensively made of metal wire (guide rod and eye) and sheet metal.

FIG. 18 shows the carrier yarn guiding device 72 in an enlarged view. The carrier yarn guiding device 72 has a base 83 by means of which it is attached to a holder 71 (cf. FIG. 15 ) can be attached. A laterally slotted eyelet 84 is suitable for receiving carrier yarns (not shown). Below the eyelet 84, an oval guide rod 86 rotatable about an axis 85 is disposed, which is suitable for variably setting the lateral distance of two carrier yarns passing through the eyelet 84. A detent mechanism 87 in which a pin 88 engages prevents accidental adjustment of the distance between the carrier yarns. The distance can be adjusted by the element with the oval guide rod is pulled backwards out of the holder until the pin 88 is no longer engaged with the latching mechanism 87 in engagement. By turning about the axis 85 of the new distance a is set between the carrier yarns.

In one embodiment, the various components of a device according to the invention have a modular on with standardized interfaces with each other, so that they can be variably assembled and adapted to different rotor spinning devices.

Claims (20)

1. A ring spinning machine (1) having a plurality of adjacent spinning positions (2), wherein a spinning position (2) is provided for producing fancy yarns (22) in a spinning triangle (50) behind a drafting device (3) of the spinning position (2) for preparing fibers of a roving (21), which is extracted from a roving bobbin (20) of the ring spinning machine (1),
   wherein the feeding speed of the fibers of the roving (21) in the drafting device (3) is controllable,
   characterized in that
   underneath the roving bobbins (20) and above each drafting device (3) a support yarn mount (30) for receiving at least one support yarn bobbin (31) per drafting device (3) of a spinning position (2) is positioned, and
   a support yarn guide (38, 60) for feeding at least two mutually distanced support yarns (32), which are unwound parallel to each other from each support yarn bobbin (31), in the region of a pair of rollers (8, 9) which are positioned in front of a spinning triangle (50), wherein
   the fibers prepared by the drafting device (3) are fed between the support yarns (32) before they are twisted together in the spinning triangle (50).
2. The ring spinning machine (1) according to claim 1, characterized in that the feed rolls (8, 9) of the drafting device (3) and the support yarn guide (60) positioned in the region of the spinning triangle (50) are used for feeding the support yarns (32) which are distanced from each other.
3. The ring spinning machine (1) according to claim 2, characterized in that the support yarn guide (60) has an inner guide (63), which is used for deviating the support yarns (32) before the spinning triangle (50).
4. The ring spinning machine (1) according to claim 3, characterized in that the inner guide (60) has a roller or a bracket or an eccentric or an element with an E-shaped cross section as a guiding means for guiding the support yarns (60).
5. The ring spinning machine (1) according to any of the preceding claims, characterized in that the support yarn mount (30) has a support cylinder (33), which is positioned along the longitudinal direction (y) of the ring spinning machine (1) and which is rotatably driven about its longitudinal axis, and which during the spinning process is interconnected to at least one support yarn bobbin (31) of a spinning position (2).
6. The ring spinning machine (1) according to claim 5, characterized in that the support cylinder (33) is positioned opposite the support yarn bobbin (31) in a way that the support cylinder (33) during the spinning process is interconnected to a peripheral surface of the support yarn bobbin (31).
7. The ring spinning machine (1) according to claim 6, characterized in that for each support yarn bobbin (31) a lifting device (57) is provided, which is used for temporarily interrupting the interconnection between the support yarn bobbin (31) and the support cylinder (33).
8. The ring spinning machine (1) according to claim 7, characterized in that the lifting device (57) is rotatably positioned about the support cylinder (33) and has a substantially crescent-shaped cross section.
9. The ring spinning machine (1) according to any of claims 5 to 8, characterized in that the support cylinder (33) consists of a plurality of segments (54), which are interconnected to each other at their respective ends.
10. The ring spinning machine (1) according to claim 9, characterized in that the segments (54) of the support cylinder are interconnected to each other by means of connection elements (55).
11. The ring spinning machine (1) according to claim 10, characterized in that the connection elements (55) are used for supporting the support cylinder (33) relative to a support (56).
12. The ring spinning machine (1) according to any of claims 5 to 11, characterized in that the support yarn mount (30) has for each support yarn bobbin (31) two guide separators (34) which are spaced a distance apart and which are substantially perpendicular to a support cylinder (33), in a way that in-between each at least one support yarn bobbin (31) may be positioned, which is at least temporarily interconnected to at least one support cylinder (33) along a peripheral line.
13. The ring spinning machine (1) according to claim 12, characterized in that the guide separators (34) have a guide means (35) for a bearing shaft (36) of the support yarn bobbin (31), such that the support yarn bobbin (31) during the spinning operation is interconnected to a support cylinder (33) along a peripheral line.
14. The ring spinning machine (1) according to claim 13, characterized in that the guide means (35) is substantially radially positioned with respect to a support cylinder (33).
15. The ring spinning machine (1) according to any of claims 5 to 14, characterized in that the support cylinder (33) is provided for driving support yarn bobbins (31) of a plurality of spinning positions (2).
16. The ring spinning machine (1) according to any of the preceding claims, characterized in that the support yarn guide (38) has a sensor for monitoring the presence of the support yarns (32).
17. The ring spinning machine (1) according to claim 16, characterized in that the support yarn guide (38) has a device (43) for interrupting the feed of support yarn (32).
18. The ring spinning machine (1) according to claim 16 or 17, characterized in that the support yarn guide (38) has a rocker (43), which is held in an equilibrium by at least two support yarns (32), which, if one of the support yarns (32) is missing, is deviated such that the feeding of the remaining support yarns (32) is interrupted.
19. The ring spinning machine (1) according to claim 18, characterized in that the rocker (43) of the support yarn guide has a centering element which holds the rocker (43) in a centered position until reaching an adjustable deviation force.
20. The ring spinning machine (1) according to claim 19, characterized in that the centering element is a magnet or a spring.

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