EP2027318B1 - Positive feedwheel system with movable thread eye - Google Patents

Description

The invention relates to a yarn feeding device for the positive, i. quantity-controlled feeding of threads to a thread-using machine, in particular a knitting machine.

Positive benefactors are known. For example, the U.S. Patent 5,782,424 such a positive feed with carrier for attachment to a machine ring and on the carrier rotatably mounted vertical axis which carries a pulley and a yarn feed wheel at the bottom. At the free end of the carrier, a yarn brake is arranged, via which a thread runs to the yarn feed wheel, which is repeatedly wrapped by the thread. Before the yarn feed wheel a yarn inlet eye is arranged, which controls the thread controlled on a conically tapering yarn inlet region of the yarn feed wheel. Between the thread inlet eye and the thread brake loads a thread feeler lever on the thread to test whether thread is present or not. When the thread breaks the thread feeler lever falls down and generates a shutdown signal. A similar yarn feeler lever is arranged downstream of the yarn feed wheel to control the thread running away from the yarn feed wheel.

While such yarn feeding devices have proven themselves in principle and have become a standard, they require some skill in threading the thread, in particular on the yarn brake, the inlet sensor and the inlet eye.

Another type of supply reveals the U.S. Patent 3,922,887 , This feeder has a carrier on which a toothed belt pulley is rotatably mounted. A driving toothed belt runs over the toothed belt pulley. A yarn guide eyelet is provided to guide a yarn onto the pulley. The thread guide eyelet is height-adjustable to guide the thread under the toothed belt in a first position, so that it is slipping or slip-free promoted. In a second position, the yarn guide loop guides the yarn onto a region of the toothed belt pulley that is not touched by the toothed belt. Here, the thread slides on the surface of the pulley so that it is not positively conveyed. The device operates in friction mode.

From the U.S. Patent 4,598,560 So-called Friktionsfournisseure are known, which have a support with vertically arranged, rotatably mounted shaft at the top a pulley and below friction wheels are provided. The thread runs in one turn around the fiction wheel and touches it at a fraction of its circumference. A so-called release lever lifts the thread from the surface of the friction wheel. The position of the Ausleghebels depends on the thread train, which acts on the thread from the thread-removing machine ago. Thus, this friction feeder promotes thread only when and as long as the thread-consuming machine pulls on the thread.

While movably mounted thread guide means serve at Friktionsfournisseuren thus to switch the thread promotion on and off, it is for positive feeders controlled to direct the thread on the inlet region of the yarn feed wheel, so that a single-layer winding is established. The yarn running on the yarn feed wheel then urges the already existing winding axially forwards one turn at a time. Thread feeler elements or other movably mounted parts serve to detect a thread break in time, so that the supplied knitting machine can be turned off before the end of the torn thread has run into the machine.

From the U.S. Patent 4,399,952 is a positive Fournisseur known which has a two-caged yarn feed wheel. The cages are inclined relative to each other to effect an advancement of the thread winding.

From the DE 43 24 412 A1 a device for adjusting the tension of a thread for negative Fournisseure is known, which has a laterally pivotable lever with Fadeneinlauföse and an apparent highly conical drum which is driven by a motor. The input thread tension is determined by the measuring device. Based on different input voltages, the lever moves with the thread inlet eye to adjust the thread tension against the force of the spring. As the yarn tension increases, the yarn is looped around a larger diameter area or delivered to the yarn drawing apparatus faster, so that the effective peripheral speed of the drum loaded by the synchronous motor can be changed in the same direction as the measured yarn tension. In another embodiment with asynchronous motor, the pivoting position of the lever is detected by the measuring device and given a signal to the actuator, which triggers an associated braking force for the induction motor to adjust the speed of the thread feeder or the thread input voltage.

The US 3,672,590 shows a feeder having a thread storage drum. The thread tension is increased by a baffle and cooperating spring to tightly loop the thread onto the conical drum. Because of the cone slope of the lead-in area and the increased thread tension, the thread shifts to the lower area of smaller diameter. When the thread take-up speed or thread take-up voltage reaches a threshold, a limit switch is triggered to turn off the machine.

Furthermore, so-called memory feeders are known, which have a thread storage drum, from which the thread is drawn off in the axial direction. On the drum, the thread passes through rotation of the drum or by a Winder.

It is an object of the invention to improve the feeder mentioned above.

This object is achieved by a yarn feeding device with the features of claim 1.

The yarn feeding device according to the invention is e.g. a positive or a memory enthusiast.

The positive feeder has a yarn delivery wheel, which is wrapped around several times by the yarn to be delivered, so that the supplied amount of yarn corresponds exactly to the revolutions of the yarn feed wheel. For this purpose, the thread inlet eye is arranged on one side of the yarn feed wheel above a provided on the yarn feed wheel thread inlet region. The yarn inlet region forms a yarn inlet bevel, i. a portion in which the diameter of the yarn feed wheel greatly reduced from an axially upper position to an axially slightly lower position. The thread entry area can be regarded as a conical section with a cone angle greater than 120 °. Instead of an exactly conical or conical structure with a circular cross section, it can also have a polygonal cross section and be formed, for example, by individual bars of a cage-like yarn feeding wheel. The yarn inlet region serves to produce a slow axial traveling movement of the yarn winding upon rotation of the yarn feed wheel.

The Speicherfournisseur has a yarn feed wheel, which is formed by a closed body or a cage can be. The thread wraps around the yarn feed wheel several times. Before it reaches the yarn feed wheel, it passes through a yarn inlet eye. The thread entry eye and the yarn feed wheel are moved relative to each other to produce a winding. The movement is achieved, for example, by a rotation of the yarn feed wheel relative to the yarn inlet eye. The feed of the yarn package can be effected by the shape of the yarn feed wheel or by a separate feed device.

The thread entry eye is so far arranged to be movable that it is pivoted by the thread running on the yarn thread in an operating position. If the thread falls away because it breaks or if it hangs very strongly for other reasons, the thread entry eye moves to a different position, which is detected by the detection means and used to generate a corresponding signal. The signal may be a switching signal or serve, for example, for signaling the error state and / or for switching off a downstream machine, for example a knitting machine.

The thread entry eye is preferably held so that it always moves in its movement from the operating position I to a shut-off position II in a vertical plane in which the axis of rotation of the yarn feed wheel is located and which extends radially away from the axis of rotation. The thread entry eye remains at least in working position and preferably also in shutdown position and possibly also in all intermediate positions above the storage area of the yarn feed wheel.

In conventional yarn feeding devices a yarn guide eyelet for the controlled guidance of the yarn on the inlet region of the yarn feed wheel and the yarn feeler lever are provided upstream of the yarn feed lever, which acts in addition rubbing on the thread. In the yarn feeding device according to the invention, the yarn feeler lever and the yarn inlet eyelet are combined to form a movably mounted element, so that in total there is no element rubbing against the thread. As a result, it is possible to work with very low yarn inlet tensions, which are lower than in the case of previous feeders. Due to the possibility to work with very low yarn entry tension, the thread is less stressed and it reduces the wear in the thread guide elements. By minimizing the number of thread deflections, the tension of the running thread and the damage to the thread are reduced. Therefore, the existing trend to very thin threads can be taken into account.

Preferably, the movably mounted Fadeneinlauföse is oriented with its axis radially to the axis of rotation of the yarn feed wheel. As a result, the function is independent of the direction of rotation of the yarn feed wheel.

The yarn feed wheel of the yarn feeding device according to the invention can be driven both by a motor with changing or constant speeds and by a belt. With the movably mounted Fadeneinlauföse monitoring of the thread tension is possible in principle. In an advantageous presently preferred embodiment, however, the thread entry eye only serves to monitor the thread breakage, ie the presence of the thread. To the Fadeneinlauföse is held by the thread against a fixed stop, preferably in a position close to the yarn delivery position (working position). If the thread breaks, the thread entry eye can move away from the thread feed wheel (shut-off position). In this case, a pivoting movement is preferably carried out. As mentioned, the path for the movement of the thread entry eye is preferably chosen such that the thread entry eye is in all end positions and, at least preferably, also in its intermediate positions at or above the thread entry region of the thread delivery wheel. This ensures that the thread, even if the thread inlet eye momentarily pivots out of its operating position, is always properly wound on the yarn feed wheel and there is no overlapping of turns there.

Preferably, the Fadeneinlauföse is supported by a pivot lever which is movably mounted at one end and at the other end of the Fadeneinlauföse mounted or formed. The pivot lever is preferably pivotable about an axis which is arranged above the upper edge of the yarn feed wheel. In addition, this axis is preferably arranged at a radial distance to the outer edge of the Fadenlieferrads and transverse to the axis of rotation. Instead of a pivot lever, other possibilities can be provided to guide the thread inlet eye, such as linear guides, parallelogram, leaf spring constructions or the like.

To monitor the position of the thread entry eye is preferably a sensor device which forms the detection means. The sensor device preferably belongs a non-contact sensor, such as a permanent magnet as a donor and a Schutzrohrkontaktschalter as a sensor element. Preferably, encapsulated contacts or other switching means such as electronic switches are provided.

Further details of advantageous embodiments of the invention are the subject of subclaims of the drawing and / or the description. This contains the essential features of the embodiments. Further details are taken from the person skilled in the drawing.

Fig. 1:

Eine Rundstrickmaschine mit Positivfournisseuren;

Fig. 2:

Einen Postitivfournisseur gemäß einer Ausführungsform der Erfindung in einer perspektivischen Seitenansicht mit Fadenführungselement in Arbeitsposition;

Fig. 3:

Das Fadenliefergerät nach Fig. 2 mit Fadenführungselement in Abschaltposition;

Fig. 4:

Das Fadenführungselement und die Sensoreinrichtung in einer schematisierten gesonderten perspektivischen Darstellung in Arbeitsposition und

Fig. 5:

Die Sensoreinrichtung nach Fig. 4 in Abschaltposition.

In the drawing, an embodiment of the invention is illustrated. Show it:

Fig. 1:

A circular knitting machine with positive feeders;

Fig. 2:

A Postitivfournisseur according to an embodiment of the invention in a perspective side view with thread guide element in the working position;

3:

The yarn feeding device after Fig. 2 with thread guide element in shutdown position;

4:

The thread guide element and the sensor device in a schematic separate perspective view in working position and

Fig. 5:

The sensor device after Fig. 4 in shutdown position.

In Fig. 1 there is illustrated a circular knitting machine 1 including a knitting cylinder 2 with a plurality of knitting needles not further illustrated. These form knitting points 3, 4 (as well as others) to which thread is to be supplied. Serve yarn feeding devices 5, 6, 7, etc., which sit on a above the knitting cylinder 2 held machine ring 8 and extend radially away from this. The yarn feeding devices 5, 6, 7, etc. are preferably constructed the same. Fig. 2 illustrates an exemplary design using the yarn feeding device 5. Each of these yarn feeding devices has a carrier 9, which is made of metal or, for example, also made of plastic. On the support 9 is a substantially vertically oriented shaft 10 in use (see Fig. 2 and 3 ) rotatably mounted. The upper end of the shaft 10 carries at least one pulley 11, via the one Fig. 1 schematically apparent timing belt 12 runs, all or at least some yarn feeding devices drives together. The toothed belt 12 is driven for example by a central drive 13 in the form of an electric motor. It is also possible to provide drive motors instead of the drive by means of the toothed belt 12 on each yarn feeding device 5, 6, 7.

The yarn feeding device 5 has at the lower end of the shaft 10, a yarn feed wheel 14 which, as Fig. 3 shows in use of a thread 15 is looped several times. By rotation of the yarn feed wheel 14, the yarn 15 is supplied to the circular knitting machine 1.

The yarn feeding device 5 is a positive feed, which in all operating conditions by substantially slip-free promotion of the thread 15 characterized by the yarn feed wheel 14. For this purpose, the yarn feed wheel 14 has a suitable configuration, in the context of which it has a yarn inlet region 16, a yarn storage region 17 and a yarn outlet region 18. The outer periphery of the yarn feed wheel 14 is preferably defined by bars 19 forming a rod cage. In the yarn inlet region 16, the corresponding portions of the rods 19 lie on a cone or cone with an opening angle of preferably significantly more than 120 °. In the yarn storage area 17, the relevant sections of the bars 19 lie on a cylinder or a cone with an opening angle of at most a few degrees. The thread outlet region 18 is formed by a flared edge which widens conically downwards. The edge may be defined by a sheet edge, a plastic part, a ceramic part or rod sections.

On the holder or support 19 further function-determining elements are provided. For example, the holder 19 has at one end a mounting clamp 20, which serves to support the machine ring 8. At the opposite end a yarn brake 21 is arranged, which is, for example. By two centrally provided with an opening discs 22, 23 is shown. By the action of magnets 22 present on the disks 22, 23, the disks 22, 23 adhere to each other and brake a yarn 15 passing between them. Instead of the magnets, other biasing means, such as springs or the like, may be provided on the disks 22, 23 act. The discs 22, 23 are movably mounted on a guiding or holding device 25, to which the discs 22, 23 by cross Pin 26 and holder include that connect the pin 26 to the carrier 9. With regard to the thread running direction 15 in front of the thread brake 21 Fadenleitmittel, such as yarn guide eyelets or the like and / or a knot catcher 27 may be arranged, for example, is formed by a thin, slotted sheet through the slot 15 of the thread runs.

For further inlet-side guidance of the thread 15, a thread inlet eye 28 is arranged between the yarn brake 21 and the yarn feed wheel 14, which is formed, for example, by an annular, preferably annular, closed ceramic element 29. However, it may also be formed as a slotted ring, the ends of each other e.g. overlap. Also, it can be closed with a resilient wire. In general, all thread guide element configurations are suitable in which the thread is e.g. can be manually introduced laterally into the interior of the eyelet from which the thread 15 but can not get out automatically.

The ceramic element 29 is supported by a lever 30, with which it is connected directly or through an intermediate piece 31, for example, made of plastic, metal or other material. The lever 30 forms with the intermediate piece 31 and the thread inlet eye 28 a yarn inlet sensor 32, which serves to monitor whether between the yarn brake 21 and the yarn feed wheel 14 thread 15 is present or whether this thread 15 is about broken (cracked). The lever 30 is pivotally mounted to, in particular from FIG. 3 , such as FIG. 4 and FIG. 5 resulting in a pivot axis 33 illustrate. Thus, the thread entry eye 28 on a in FIG. 3 indicated arcuate path 34 between at least two positions I and II are moved.

The lever 30 has for storage of the intermediate piece 31 on a web 30a, which is e.g. extends parallel to its pivot axis 33. The web 30a or the intermediate piece 31 serve to hold the thread 15 approximately at the level E, when the lever 30 is in Abstellposition II. This allows the use of a relatively short lever 30, so that the yarn inlet point on the yarn feed wheel 14 is approximately retained when the lever 30 pivots.

Position I goes off FIG. 2 out. Position II is off FIG. 3 out. Position I is a working position. In this, the lever 30 is applied to a stop 35 which crosses the path of the lever 30. The stop 35 may be a fixed stop, for example. In the form of a metal or plastic pin or a damping stop in the form of a spring stop, a rubber stopper, a made of felt or occupied with another damping material element or the like. The lever 30 is loaded by its own weight or provided in the support 9 biasing means, for example. A spring with little force downwards, so that he has a tendency to pivot in position II. This may be effected, for example, by a second lever arm 36 which is connected to the lever 30 in the center of rotation or at another suitable location and which extends at an angle thereto. The lever arm 36 can be arranged approximately horizontally in position I, so that its weight has the tendency to urge the lever 30, which is inclined in this position at an acute angle to the vertical, into its position II, ie away from the yarn feeding wheel 14.

The lever arm 36 can also be used to monitor the position of the thread entry eye 28. The purpose of a detection device 37, to which a sensor device 38, consisting of a transmitter element 39 and a sensor element 40, belong. The transmitter element 39 may, for example, be a permanent magnet. The sensor element 40 may be a magnetically sensitive element; such as being a protective tube contact switch. This is preferably arranged so that the permanent magnet 39 does not close the circuit in the Schutzrohrkontaktschalter 40 when the thread entry eye 28 is in position I. This is in FIG. 4 separately illustrated. The permanent magnet 39 is located at an appropriate distance from the sensor element 40, so that the contact tongues 41, 42 of the Schutzrohrkontaktschalters not or little to wear and have no contact. In position II according to FIG. 5 the permanent magnet 39 is adjacent to the sensor element 40, so that the contact tongues 41, 42 attract and close.

The sensor device 38 can also cooperate with other elements, for example, be attached to the lever 30 or the intermediate piece 31. It can also be arranged in the interior of the carrier 9. For example, it is possible to arrange the transmitter element 39 in the form of the permanent magnet on the lever 30 or the lever arm 36 and the sensor element 40 in the interior of the carrier 9.

To the yarn feeding device 5 also includes one or two Fadenauslaufösen 43, 44, which are arranged with respect to the thread running path behind the yarn feed wheel 14 below the support 4, for example. Following a signal lamp 45. Between the thread outlet eyes 43, 44 may be a thread outlet sensor 46 on the thread 15 load. The thread outlet sensor 46 is formed, for example, by a bracket 9 pivotally mounted on the bracket, which lies with an end or web on the thread 15.

• In Betrieb dreht der Zahnriemen 12 die Riemenscheibe 11 und somit das Fadenlieferrad 14. Der Faden 15 umschlingt das Fadenlieferrad 14 vielfach und bildet somit einen Wickel 47 (Figur 2) mit einer Windungszahl, die bspw. zwischen 5 und 25 liegen kann. Das Fadenlieferrad 14 zieht dabei ständig Faden 15 nach und gibt über seinen Fadenauslaufbereich 18, d.h. seinem unteren Rand streifend Faden an die Strickmaschine ab. Der Faden 15 ist zwischen der Fadenbremse 21 und dem Fadeneinlaufbereich 16 der Einstellung der Fadenbremse 21 entsprechend relativ straff gehalten. Er zieht deshalb die Fadeneinlauföse 1 an das Fadenlieferrad 14 heran, so dass der Hebel 30 an dem Anschlag 35 anliegt.
  In dieser aus Figur 2 ersichtlichen Position steht die Fadeneinlauföse 28 vorzugsweise im Wesentlichen unbeweglich etwa auf Höhe des oberen Rands, d.h. des Fadeneinlaufbereichs 16 des Fadenlieferrads 14 oder etwas oberhalb desselben. Der Faden 15 wird somit auf den Fadeneinlaufbereich 16 geführt, über den er streift und sich an den vorhandenen Wickel 47 anlegt, ohne bereits vorhandene Lagen zu überdecken. Er drängt sich zwischen den steilen Fadeneinlaufbereich und den Wickel 47 und schiebt diesen deshalb bei jeder Umdrehung des Fadenlieferrads 14 um eine Fadenstärke axial nach unten.

The yarn feeding device 1 described so far operates as follows:

• In operation, the toothed belt 12 rotates the pulley 11 and thus the yarn feed wheel 14. The yarn 15 wraps around the yarn feed wheel 14 many times and thus forms a winding 47 (FIG. FIG. 2 ) with a number of turns, which may be, for example, between 5 and 25. The yarn feed wheel 14 constantly pulls the thread 15 and is about his thread outlet region 18, ie his lower edge grazing thread to the knitting machine. The thread 15 is held relatively tight between the yarn brake 21 and the yarn inlet region 16 of the setting of the yarn brake 21 accordingly. He therefore pulls the thread inlet eye 1 to the yarn feed wheel 14, so that the lever 30 abuts against the stop 35.
  In this out FIG. 2 apparent position, the thread inlet eye 28 is preferably substantially immovable approximately at the height of the upper edge, ie the yarn inlet region 16 of the yarn feed wheel 14 or slightly above it. The thread 15 is thus guided on the thread inlet region 16, over which it brushes and applies to the existing winding 47, without covering existing layers. He pushes himself between the steep yarn inlet region and the winding 47 and pushes it therefore for each revolution of the yarn feed wheel 14 by a thread thickness axially downwards.

Tear the thread 15 or it comes by another circumstance to the complete elimination of the thread tension at the thread inlet side, enters the FIG. 3 illustrated state. For example, under the weight of the permanent magnet (donor element 39), the lever 30 has some tendency to pivot away from the yarn feed wheel 14. The eyelet 28 sets the arcuate path 34 back, which is preferably completely above a in FIG. 3 dash-dotted lines indicated level E, which intersects the yarn inlet region 16 and on which the axis of rotation A of the yarn feed wheel 14 is vertical. At least the two positions I and II are above the plane E. Thus, it is ensured that the thread guide eyelet 28 regardless of the thread tension and regardless of whether it is in its operating position I, a proper inlet guide of the thread 15 on its way to the thread inlet region 16th and the thread storage area 17 provides. By combining thread feeler element and thread guide element, the required number of parts is reduced. The thread is subject to less friction compared to the prior art. The structure is clearer and the threads are easier to thread than before. This in particular because the thread entry eye pivots without a thread in a remote from the yarn feed position, which is easily accessible by hand.

If the yarn feeding device 5 blown off with compressed air, there is usually no inadvertent machine shutdown to be feared. Normally, the jet of compressed air is directed to the yarn feeding device and to the yarn feed wheel 14, so that the yarn inlet eye is pressed against its stop 35 and thus does not move.

The suspension of the Fadeneinlauföse or the lever 30 is preferably arranged on the underside of the holder 9, so that the side surfaces of the support 9 is smooth and free of wires or other projections. This favors the cleaning of the yarn feeding device 5. Flow accumulations, as they can currently form on existing equipment, are hardly possible.

In addition, the carrier 9 can be formed as outwardly dense housing.

In the yarn feeding device according to the invention, the thread inlet eye serves as a thread breakage sensor. This is made possible by the Fadeneinlauföse is movably mounted, wherein it performs its function in all its positions, which is to guide the thread 15 controlled on the yarn inlet region 16. Preferably, the yarn guide eyelet is the only thread-contacting element between the yarn brake and the yarn feed wheel. The thread guide eye is accessible in the parking position on the front side of the yarn feeding device. The threading of the thread is possible with one hand.

LIST OF REFERENCE NUMBERS

1.

Circular knitting machine

Second

knitting cylinder

Third

knitting point

4th

knitting point

5th

Yarn feeder

6th

Yarn feeder

7th

Yarn feeder

8th.

Maschinenring

9th

carrier

10th

wave

11th

pulley

12th

toothed belt

13th

drive

14th

yarn feed wheel

15th

thread

16th

Yarn inlet area

17th

Yarn storage region

18th

Yarn output range

19th

rods

20th

mounting clamp

21st

thread brake

22nd

disc

23rd

disc

24th

magnet

25th

holder

26th

pen

27th

strainer

28th

yarn inlet eyelet

29th

ceramic element

30th

lever

31st

connecting piece

32nd

Yarn inlet probe

33rd

swivel axis

34th

train

35th

attack

36th

lever arm

37th

detector

38th

sensor device

39th

transmitter element

40th

sensor element

41st

Contact

42nd

Contact

43rd

Fadenauslauföse

44th

Fadenauslauföse

45th

Warning light

46th

Yarn output sensor

47th

reel

Claims (24)

1. Thread delivery device (5) for supplying at least one thread (15) to a thread (15) using machine (1), in particular a knitting machine, circular knitting machine (1), warp knitting machine, flat knitting machine, weaving machine or similar machine,
   comprising a carrier (9) on which a thread delivery wheel (14) to be looped round multiple times by the thread (15) is mounted rotatably, which has a vertically arranged axis of rotation (A) when in use and which picks up the thread (15) without slipping according to its rotation,
   comprising a thread input eyelet (28) which is arranged on one side of the thread delivery wheel, characterised in that the thread input eyelet (28) is held movably adjustably between at least two different positions (I, II) determined by the thread tension,
   wherein the thread input eyelet (28) in the operating position (I) is held by the thread tension against a fixed stop (35) in a position close to the thread delivery wheel (14), and
   wherein the thread input eyelet (28) in the switch off position (II) in case of a break in the thread (15) is moved away from the thread delivery wheel (14) and in that
   the thread delivery device (5) comprises a detecting means (37) for detecting the position of the thread input eyelet (28).
2. Thread delivery device according to claim 1, characterised in that the thread delivery wheel (14) is driven by a pulley (11).
3. Thread delivery device according to claim 1, characterised in that the thread delivery wheel (14) is driven by an electric motor.
4. Thread delivery device according to claim 1, characterised in that the thread delivery wheel (14) has a steeply tapering entry area (16).
5. Thread delivery device according to claim 1, characterised in that the thread delivery wheel (14) has a storage area (17), the diameter of which is essentially constant along its axis (A).
6. Thread delivery device according to claim 1, characterised in that the thread delivery wheel (14) comprises a thread output area (18) which is formed by an exposed conical edge.
7. Thread delivery device according to claim 4, characterised in that the thread input eyelet (28) is arranged in at least one of its positions (I, II) at the height or above the thread input area (16).
8. Thread delivery device according to claim 7, characterised in that the thread input eyelet (28) is arranged in both positions (I, II) at the level of or above the thread input area (16).
9. Thread delivery device according to claim 1, characterised in that the thread input eyelet (28) is supported by a pivot lever (30).
10. Thread delivery device according to claim 1, characterised in that the pivot lever (30) has a pivot axis (33) which is arranged perpendicular to the axis of rotation (A) of the thread delivery wheel (14).
11. Thread delivery device according to claim 10, characterised in that between the pivot axis (33) and the axis of rotation (A) there is a spacing which is greater than the greatest diameter of the thread delivery wheel (14).
12. Thread delivery device according to claim 1, characterised in that a thread brake (21) is assigned to the thread delivery wheel (14), through which thread brake the thread (15) passes before it reaches the thread delivery wheel (14).
13. Thread delivery device according to claim 12, characterised in that the movably mounted thread input eyelet (28) is the only thread guiding means contacted by the thread (15) between the thread brake (21) and the thread delivery wheel (14).
14. Thread delivery device according to claim 1, characterised in that the detecting means (37) is a sensor device (38) which includes a transmitter element (39) and a sensor element (40).
15. Thread delivery device according to claim 14, characterised in that the transmitter element (39) is mounted movably and is connected to the thread input eyelet (28).
16. Thread delivery device according to claim 14, characterised in that the sensor element (40) is mounted non-movably and is connected to the carrier (9).
17. Thread delivery device according to claim 14, characterised in that the sensor element (40) is arranged in or on the carrier (9).
18. Thread delivery device according to claim 14, characterised in that the transmitter element (39) is a permanent magnet and the sensor element (40) is a protective tube contact switch.
19. Thread delivery device according to claim 1, characterised in that the thread input eyelet (28) comprises an annular thread guiding element (29).
20. Thread delivery device according to claim 19, characterised in that the thread guiding element (29) is configured to be annularly closed.
21. Thread delivery device according to claim 1, characterised in that the thread delivery device (5) is a positive feeder.
22. Thread delivery device according to claim 1, characterised in that the thread delivery device (5) is a storage feeder.
23. Thread delivery device according to claim 1, characterised in that the thread guiding element (29) in a switch off position (II) pivoted away from the thread delivery wheel (14) adopts a threading position in which the thread guiding element (29) is freely accessible.
24. Thread delivery device according to claim 23, characterised in that the threading position is a position immediately below a thread brake (21).

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