EP3000340A1 - Thread feeding apparatus - Google Patents

Abstract

The invention relates to a yarn feeding device for providing work threads with a base (1), at least one arm holder (2) attached to the base (1), at least one feed arm (3) arranged thereon. Providing the work threads (5) and with at least one wound thread reservoir carrying and about a rotation axis (D) rotatable thread bobbin (4), from which the working thread (5) train on the working thread (5) and the consequent unwinding is deducted, wherein a tensioning means is provided, which the thread (5) is able to tension in a direction opposite to the withdrawal direction. The known yarn feeding devices have the disadvantage that the yarns are stretched by suspended weights, which leads to a risk of entanglement of yarns. This improves the invention in that the thread bobbin (4) is mounted on a bobbin holder (6) arranged on the feed arm (3), at least one thread return spring (13) limited in its deflection capability by a first stop (7) for forming the tension means. is provided, which is arranged such that it is deflected at a sufficient for the removal of the thread (5), acting on the thread (5) tensile force, and the thread bobbin (4) is mounted such that the unwinding unwinding braking force is present, which is greater than the spring force of the thread return spring (13).

Description

• einer Basis,
• zumindest einem an der Basis befestigten Armhalter,
• wenigstens einem, an dem Armhalter angeordneten Zuführarm zur griffgerechten Bereitstellung von Arbeitsfäden, insbesondere Webfäden, und
• mit zumindest einer, ein aufgewickeltes Fadenreservoir tragende und um eine Drehachse drehbare Fadenspule, von der ein Faden durch eine an dem Zuführarm angeordnete Fadenführung in einer Abzugsrichtung durch Zug an dem Faden und das dadurch bedingte Abwickeln der Fadenspule, abziehbar ist.

The invention relates to a yarn feeding device for providing threads to a workstation of a person, in particular a weaving station, with

• a base,
• at least one arm holder attached to the base,
• at least one, arranged on the arm holder feed arm for the handle-friendly provision of work threads, in particular Web threads, and
• with at least one, a wound yarn reservoir carrying and rotatable about an axis of rotation yarn package, of which a thread through a arranged on the feed arm thread guide in a take-off direction by pulling on the thread and the consequent unwinding of the bobbin, deductible.

The generic yarn feeding devices are used in particular at the workplace of a weaver in order to deduct the individual weaving threads and provide them in accordance with their intended use. A typical application is, for example, the weaving of hairpieces in which, for example, three or more threads are manually stripped from bobbins and woven together. The yarn feeding devices have for each abzuspulenden thread on a clamping means over which the thread is biased in each case in a direction opposite to the withdrawal direction with little force. Such yarn feeding devices are used in particular by manual workers, for example when weaving the base of hairpieces. They usually have several thread bobbins, so that the user can work with several threads. The advantage here is the use of the clamping means, as they avoid the hanging and tangling of the threads during work.

Such a yarn feeding device for the parallel provision of three weaving threads is known from US 5,178,237 DE 10 2009 041 867 A1 known. This yarn feeding device has three supply arms, on which outside of three different bobbins abzuzuspulende threads are guided through guide eyelets. The clamping means are formed by weights, which hang in each case between two guide eyes on the thread.

A disadvantage of the known yarn feeding device is that the drooping weights and the loop of thread hanging therefrom can not preclude a certain risk of entanglement and have not appeared visually very lucrative. In addition, the weight must be chosen so that on the one hand is able to keep the thread taut, on the other hand, but not so large that it falls to the ground and automatically unwinds the coil at least until it is on the ground rests. Finally, the open thread guide is often perceived as less attractive.

The object of the invention is therefore to provide a yarn feeding device, which ensures a safe operation with ease of use and is as attractive as possible in the visual appearance.

This object is achieved according to the invention in that the yarn package is mounted on a supply arm arranged on the coil holder, wherein at least one limited in their deflection by a first stop thread return spring is provided to form the clamping means, which is arranged such that it at a is sufficient for the removal of the thread sufficient force acting on the thread tensile force, and the yarn package is mounted such that there is a counter to the unwinding braking force, which is greater than the spring force of the thread return spring.

The invention is based on various improvements. On the one hand, the restoring tension, which acts on the thread, should be made as user-friendly as possible. This is achieved by the above-mentioned features, namely that the bobbin is either unwound against the force of a thread return spring or is movably mounted in the withdrawal direction, in the latter case, the thread return spring presses the bobbin against the withdrawal direction. In both cases, of course, the bobbin must be designed so that an unwinding counteracting braking force is present, so that when a tensile force on the thread first the thread return spring is biased and only then unwinds the thread. At one point between the front end of the feed arm and the thread return spring, a clamp can be provided, over which the thread can be clamped when not in use, so that it is avoided that the thread is inadvertently pulled back into the feed arm.

Another aspect of the invention is the thread guide. Basically, this aspect can be implemented independently of the thread return spring, but by the application of the retraction force on the side of the bobbin a hidden thread guide is particularly easy. The reason for this is that now no area has to be provided where weights have to hang freely.

For thread guidance of the feed is designed so that through a hollow cylindrical portion of the thread can be passed. If no thread return spring is used, it would also be possible to work with the weights known from the prior art in this embodiment. These could then be integrated, for example, in the columnar arm holder, wherein the thread can then be guided by the bobbin through the arm holder in the feed and weights are provided in the arm holder, which are connected to the thread and pull it inside the hollow cylindrical arm holder down. So that the weights of different threads, if there are multiple threads, do not collide with each other, the weights can be guided inside the arm holder. Alternatively, of course, the weight or weights can be arranged on the outside of the arm holder and stored there displaceable.

A particularly convenient combination of the two aspects of the invention comprises feed arms, at one end of the bobbin is arranged with the thread return spring. From there, the thread is inserted into the hollow cylindrical feed arm and exits at the front free end of the feed again. For insertion of the thread, the feed arm can have, for example, a slot-like thread take-up. Alternatively, the thread can also be inserted initially with an aid, for example a push rod, through the feed arm. This concealed thread guide is perceived by many users to be particularly attractive.

Further advantageous features of special embodiments of the yarn feeding device comprise a modular structure, so that the user can individually adjust the number of working threads available. Thus, the arm holder may consist of plug-together individual modules, to each of which a feed arm is attached or can be attached. At this Zuführarms then the bobbin is provided with the resilient mounting of the thread.

Another aspect may be a height adjustment of the thread guide. For this purpose, either portion of the arm holder or the whole arm holder may be formed as a telescopic rod or the arm holder may be formed so that it is variable in height on the use of different spacers. Also, the feed arms can be extended, this can also be realized by the use of telescopic rods or by lugs that can be plugged for example on the front of the hollow cylindrical feed arms.

Finally, a flexible solution is also possible both for the arm holder and for the feed arms, which allows the arm holder or or and the feed arm to bend elastically so that it retains its shape.

Further features and advantages of the invention will become apparent from the subclaims and from the following description of preferred embodiments with reference to the drawings.

Fig. 1

eine erste Ausgestaltung einer erfindungsgemäßen Fadenzuführvorrichtung,

Fig. 2

den Zuführarm der in Figur 1 dargestellten Fadenzuführvorrichtung,

Fig. 3

die Fadenspule des in Figur 2 dargestellten Zuführarms,

Fig. 4

eine Alternative Ausgestaltung einer Fadenspule mit seitlicher Fadenrückzugsfeder,

Fig. 5

den Spulenhalter des in Figur 2 dargestellten Zuführarms in einer vergrößerten Darstellung,

Fig. 6

eine weitere Ausgestaltung eines Spulenhalters,

Fig. 7

einen Schnitt durch die in Figur 3 gezeigte Fadenspule,

Fig. 8

die Fadenrückzugsfeder der in Figur 3 dargestellten Fadenspule,

Fig. 9

die Einzelheit "Z" aus Figur 2 mit der Fadenaufnahme in einer Detailansicht,

Fig. 10

ein Schnitt durch einen Zuführarm

Fig. 11

eine weitere Ausgestaltung einer Fadenzuführvorrichtung,

Fig. 12

ein Fadenmagazin mit seiner Lagerung im Armhalter der Fadenzuführvorrichtung gemäß Figur 11,

Fig. 13

einen Schnitt durch eine Ausführung eines Armhalters mit angeklickten Zuführarmen,

Fig. 14

einen Armhaltering für einen Zuführarm der Ausgestaltung nach Figur 13,

Fig. 15

ein Ausführungsbeispiel für eine modulare Fadenzuführvorrichtung und

Fig. 16

ein Beispiel eines Fadenrollenmagazins, das auf den Armhalter aufsteckbar ist.

In the drawings shows:

Fig. 1

A first embodiment of a yarn feeding device according to the invention,

Fig. 2

the feeding arm of the FIG. 1 shown yarn feeding device,

Fig. 3

the bobbin of the in FIG. 2 shown Zuführarms,

Fig. 4

an alternative embodiment of a bobbin with lateral thread return spring,

Fig. 5

the bobbin holder of in FIG. 2 shown Zuführarms in an enlarged view,

Fig. 6

a further embodiment of a bobbin holder,

Fig. 7

a section through the in FIG. 3 shown thread bobbin,

Fig. 8

the thread return spring in FIG. 3 shown thread bobbin,

Fig. 9

the detail "Z" off FIG. 2 with the thread take-up in a detail view,

Fig. 10

a section through a feed arm

Fig. 11

a further embodiment of a yarn feeding device,

Fig. 12

a thread magazine with its storage in the arm holder of the yarn feeding device according to FIG. 11 .

Fig. 13

a section through an embodiment of an arm holder with clicked feed arms,

Fig. 14

an arm support ring for a feed arm of the embodiment according to FIG. 13 .

Fig. 15

an embodiment of a modular yarn feeding device and

Fig. 16

an example of a thread reel magazine, which is attachable to the arm holder.

In FIG. 1 a yarn feeding device according to the invention is shown. Like the known yarn feeding devices, it has a base 1, an arm holder 2 arranged thereon and, in turn, feeding arms 3 arranged on the arm holder 2. At the feed arms 3, a bobbin holder 6 is arranged in the right region, which forms a bearing for the bobbin 4 here. Of this bobbin 4, as will be described in more detail below, a thread 5 performed by the feed 3 and can be removed for weaving, especially of bases of hairpieces.

In the illustrated embodiment, the arm holder 2 is height adjustable. For this he is in the lower part after the manner of a telescopic rod extendable. To fix the height adjustment either pins can be provided, which are inserted into corresponding openings in the double-walled area of the arm holder 2. Alternatively, a frictional force may be present, so that an explicit fixing is unnecessary.

The feed arms 3 are attached to individual upper segments of the arm holder 2. These segments are preferably rotatable relative to each other and relative to the arm holder 2. This feature is also optional, the utility according to the invention would also occur without rotation of the feed arms 2. The feed arms 3 may also be variable in length, in particular designed to be extendable. For this purpose, they have a rear hollow cylindrical Area and an inserted therein front push rod. In the upper part, the feed arms 3 are provided with a slot-like thread take-up 10.

After installation of the bobbin 4, the user can unwind the thread 5 from the bobbin 4 and insert from above into the slot of the thread receiving 10. Since the thread 5 is usually pulled down, additional security measures against unwanted slipping out of the thread 5 from the feed 3 are usually unnecessary. However, should such a fuse be desired, this can either be the flap-like fuse described below or it can be closed particularly simply by turning the push rod relative to the rear support rod in the connecting region of the two rods of the slot. Locking means can facilitate the finding of the closed and the open position.

According to the invention, a retaining force for the thread 5 is provided. This is formed in the embodiment shown here by a built-in bobbin 4 thread return spring 13 (not visible here). The thread return spring 13 tensions the thread 5, so that it does not hang down during work and tangling of the threads 5 is largely avoided.

How out FIG. 3 it can be seen here is the bobbin 4 from a thread drum 11, which is attached to a drum holder 12. The thread drum 11 and the drum holder 12 are mutually rotatable against the force of the thread return spring 13 by a defined angular range. This means that the user first by train on the thread 5, the thread drum 11 is rotated relative to the drum holder 12 until this relative movement is limited by a stop. Upon further pulling on the thread 5, the entire assembly is rotated and the thread 5 is unwound from the thread drum 4. At the same time, however, the restoring force of the thread return spring 13 acts on the thread 5, so that when the tensile force is released by releasing the thread 5, the thread drum 4 is automatically reset by the angular range. To limit this angular range, a first stop 7 and a second stop 8 are provided, as shown FIG. 7 and FIG. 8 is apparent.

However, it is not necessary to provide explicit stops, but the same effect can also be achieved via the force ratio of the withdrawal force and the spring force of the thread return spring 13. Thus, the retraction function described above on the thread return spring 13, the thread 5 must be stored so that it can be handled only to overcome a withdrawal force. This is done most easily on the storage of the thread drum 11. Here, a frictional force can be provided, the larger Only then it is possible to tension the thread return spring 13 at the beginning of the withdrawal of the thread 5.

Of course, alternatively, the fact can be used that usually the force of the thread return spring 13 increases with increasing deflection, so that at some point the moment is reached at which this force exceeds the frictional force of the storage of the thread drum 11, at which time the thread 5 unwound becomes. The attack can then be dispensed with.

In the FIGS. 7 and 8 a first possibility of an embodiment of the thread drum 4 is shown. Inside, the drum holder 12 can be seen. To implement the first stop 7 and the second stop 8 a side of the drum holder 12 hervorspringender Drehwinkelbegrenzer 9 is provided. This consists essentially of a radius increase in this area. The inside of the thread drum 11 is adapted thereto and has a running surface for this rotation angle limiter 9 over a larger angular range. The ends of the tread, which is formed as a groove or circular recess in the inner circumferential surface of the drum holder 12, represent the stops 7 and 8. The drum holder 12 and the thread drum 11 are connected via the thread return spring 13, each with one end to one of two components is attached to each other, so that a relative movement between the drum holder 12 and the thread drum 11, the yarn return spring 13 biases.

On the outside of the thread drum 11, a thread supply (shown here in black) is wound on. The drum holder 12 is rotatably mounted in the coil holder 6, wherein this storage is formed so that the rotation of the drum holder 12 is opposed to a counter force which is greater than the spring force of the thread return spring 13. In this way, first drum holder 12 and the thread drum 11 are rotated relative to each other, in the further course of the drum holder 12 and thus the whole yarn package 4 is then rotated and unwound. The thread return spring 13 is formed as a tension spring. Alternatively, we can of course be used torsion springs or other spring means.

FIGS. 4 and 6 show possible alternatives of storage of the bobbin 4. In FIG. 4 is shown instead of a tension spring loaded with torsion spring solution. Here the thread drum 12 is much thinner. This can be helpful when using thread drums 11 which are commercially available and have an inner diameter given by the trade. The thread return spring 13 is here formed by two above and below the thread drum 4 arranged torsion springs. The coil springs shown are only to be understood as an example, for example rubber springs can also be used here.

To unwind the bobbin 4, the drum holder 12 can be mounted with friction either in the thread drum 11 or on the springs of the thread return spring 13. Is also not necessary to use two springs, alternatively, a single spring can be used, in which case either no storage or a freely rotatable storage is provided on the opposite side. Another possibility is the rotatable and frictional bearing of the springs, so that the whole, in FIG. 4 shown assembly is justified against the opposing force.

FIG. 5 is an illustration of the right portion of the storage of the bobbin 4 on the bobbin holder 6 in an enlarged view. Here it can be seen that the thread 5 is guided through a thread eye 20 in the feed arm 3. In the upper part of the thread take-up 10 can be seen as a slot. The feed arm 3 is essentially a hollow cylindrical rod which is slotted in the upper region to form the thread take-up 10. The bobbin holder 6 is here designed as a rectangular frame which is fastened on the one hand to the feed arm 3 and on the other hand to the bobbin 4. This is a further advantage of the invention that the thread bobbin 4 is arranged and fixed directly on the feed arm 3, while it is held in the prior art via separate components on the arm holder 2.

In FIG. 6 an alternative implementation of the inventive concept is shown. In this alternative, the thread return spring 13 is also formed by two springs, which are shown here by way of example as a helical spring. These are compressed by the withdrawal force when pulling on the thread 4. Again, the thread 5 passes through the thread eye 20 which is fixed to the front part of the bobbin holder 6. In this embodiment, therefore, the entire yarn package 4 is used to the feed 3.

Alternatively, of course, it would also be conceivable that the thread bobbin 4 is fixedly mounted on a feed arm 3 and that the feed arm 3 in turn is held by a spring force on the arm holder 2.

Ultimately, it is important for the implementation of the basic idea of the invention that a spring force directly or indirectly holds the bobbin 4 and is directed so that the withdrawal force applied to the thread 5 causes a shift of the bobbin 4, taking into account the above-mentioned balance of power , In this case, the spring means is not limited to one or two springs, if in this description of thread return spring 13 is spoken, this also means a package of successively and / or connected in series springs. FIG. 9 again shows the detail "Z" FIG. 2 , Here, the transition of the outer part of the feed arm 3 is shown to the insertion tube inserted into it. To recognize here is also the slit-like thread receiving 10th

FIG. 10 is a sectional view of the in FIG. 9 This feed arm 3st has by way of example a slot-like thread take-up 10, which is closed by a thread lock 21. Thread lock 21 is formed here by a flap. This flap may be formed continuously along the entire length of the feed arm 3, alternatively, only a smaller flap may be provided or a plurality of flaps may be used at some positions.

Of course, all other retaining means may be used instead of the flaps 21 as a thread lock, in particular, it should be noted that only the unintentional passage of the relaxed thread 5 must be prevented, so that bristles or similar means are sufficient.

A further advantageous embodiment of the invention shows FIG. 11 , In this embodiment, the thread bobbins 4 are arranged on a common unit which is integrated in the arm holder 2. The feed arms 3 are formed here as a hollow cylindrical rods and have the slot as a thread receiving 10. The feed arms 3 are rotatable about an axis of rotation D relative to the arm holder 2, here, as well as in the in FIG. 1 illustrated embodiment, is designed as a hollow cylinder. The rotation axis D is concentric with the center axis of the cylindrical arm holder 2.

Details on the formation of the thread bobbins 4-bearing unit and their storage in the arm holder 2 are in FIG. 12 shown. It can be seen that the thread bobbins 4 are arranged on a common thread bobbin insert 15. This consists essentially of a shaft which is inserted into the arm holder 2 from above and rests at the bottom with an insertion limit on an inwardly projecting edge of the arm holder 2. In the upper region of the thread bobbin insert 15 is secured by a locking pin 23. On the thread bobbin insert 15 three thread bobbins 4 are here placed, which are rotatably mounted relative to the thread bobbin insert 15 on this, wherein the thread return spring 13, not shown here acts against the rotation of the bobbin 4 relative to the thread bobbin insert 15.

In order that the thread 5 can be guided out of the arm holder 2, arm holding rings 14 are provided which have an exit window as a thread passage 19 on the side of the feed arms 3. At the Armhalteringen 14, the feed arms 3 are attached. The feed arm 3 and the Armhaltering 14 may also be formed by a common component or firmly together be connected. In the embodiment shown here, however, the feed arms 3 are provided with lateral jaws, via which they can be attached to the Armhaltering 14. This will be in conjunction with the FIGS. 13 and 14 later described in detail.

The Armhalteringe 14 are long the axis of rotation D slidably mounted on the arm holder 2 and are held by a return spring 16 in an upper operating position. This is because after inserting the thread bobbin insert 15 into the arm holder 2, the arm retaining rings 14 can be pulled down with one hand, so that the thread passage 19 increases to such an extent that the user can grip with two fingers into the window thus formed and the free end of the thread 5 can pull out of the arm holder 2. Since the feed arm 3 is pulled down together with the Armhaltering 14, the user draws in this way the thread 5 on the feed arm 3 and can simply insert the thread in the upper slot of the thread take-up 10. After the arm retaining ring 14 has returned to its original position, the thread 5 is then passed through the thread passage 19, so that this thread passage 19 can replace the thread eye 20.

The locking pin 23 serves not only to secure against pulling up, but also as a turnstile. This prevents the tensile force on the thread 5 or the force applied by the thread return spring 13 from twisting the thread bobbin insert 15 in the arm holder 2.

In the FIG. 12 illustrated embodiment has the particular advantage that on the one hand, the entire thread supply is hidden in the arm holder 2 is provided and on the other hand, the thread bobbins 4 can be offered as a replacement unit. Of course, this requires a uniform consumption of the respective threads 5.

In the FIGS. 13 and 14 the holder of the feed arms 3 is shown in detail. It can be seen here that the arm holder ring 14 has laterally protruding snap-on aids 18 (see FIG FIG. 14 ). Further, the thread passage 19 is in FIG. 14 clearly visible. Of course, the tube forming the arm holder 2 has a corresponding recess, so that the thread passage 19 is continuous.

The feed arm 3 has, as in FIG. 13 is shown, lateral jaws, which have pockets on their inside in the form of depressions. After the jaws are first widened when attaching to the Armhaltering 14, they then spring back again, wherein the locking aids 18 engage in the pockets and so determine the feed arm 3 positively on the arm holder 2. This has the advantage of having the connection between Armhaltering 14 and feed arm 3 can be loaded with a larger moment without the feed arm 3 would fall down.

In FIG. 15 a modular embodiment of the yarn feeding device is shown. Here it can be seen that the individual holders of the feed arms 3 are fastened to pipe sections, which in turn can be plugged onto a lower pipe section of the arm holder 2. This lower tube piece is simultaneously designed to realize a height adjustment as a telescopic rod. In the embodiment shown, three segments are provided, so that here three feed arms 3 are implemented. Due to the modular design, the user can individually determine the number of threads 5 supplied to him.

The upper end is formed by a plug, which can be plugged onto the uppermost segment. As an alternative, this plug may also be formed as a hollow tube piece that can store one or more thread bobbins 4 as a thread reel magazine 24, wherein this one thread reel magazine 24 may have two opposite, side slots which are so large that the user with 2 fingers each the uppermost bobbin 4 can grip and replace a consumer thread bobbin 4 on the bobbin holder 6 thereby. Such an embodiment shows FIG. 16 ,

The length adjustability of the feed arms 3 and the arm holder 2 is to be understood in each case as an additional option, which adapts the yarn feeding even better to the individual needs in the examples mentioned. To implement the basic idea of the invention, however, these features are not necessary. The same applies to the thread roller magazine 24. The components "concealed thread guide" and "resilient positioning" of the thread bobbins 4 and resilient mounting of the thread drum are also independently suitable to further develop the generic yarn feeding devices in an inventive manner.

In FIG. 17 Finally, another variant of the yarn feeding device is shown. In this variant, the arm holder 2 consists of 2 components, on the one hand a hollow cylindrical foot, which is connected here via a welded connection to the base 1. In this hollow cylindrical foot, the upper component is inserted, which may be formed by a solid rod or a hollow cylinder. This upper component then carries the feed arms 3 in its upper area.

In the region of the insertion region of the lower and the upper component of the arm holder 2 a column lock 25 is provided, which is here formed by a fixedly arranged on the hollow cylindrical, lower part nut with a recess arranged behind it in the wall of the hollow cylindrical part, in which a clamping screw screwed is. On the one hand, the height position can be fixed, on the other hand, the rotation angle about the rotation axis D are determined after its adjustment via this clamping screw.

The feed arms 3 may be fixed or rotatably connected to the upper component of the arm holder 2. In the right area, they carry the bobbin holder 6, on which in turn the bobbin 4 with the thread drum 11 is held.

The illustration shows four different cutting planes. The first sectional plane illustrates the structure of the arm holder 2. The second sectional plane, which shows the lower of the three feed arms 3, cuts the feed arm 3 in the middle. It can be seen here that the feed arm 3 is formed by a sleeve attached to the arm holder 2, in which a piston is inserted. The piston is reduced in diameter in the left region, resulting in a gradation that allows space for the arrangement of the thread return spring 13. This is wound around the stepped, reduced diameter portion, as best seen from the third cutting plane, which shows the central feed 3.

The sleeve in turn has in the front region on a through opening, which is only slightly larger than the diameter of the stepped, front portion of the piston. As a result, on the one hand, the piston can pass through this push-through opening, but on the other hand, the thread return spring 13 is supported on the inner shoulder of the sleeve. In this way, the thread return spring 13 pushes the piston within the sleeve back in the direction of the bobbin 4. Again, the bobbin 4 can be unwound only against a force which is greater than the spring force of the thread return spring 13, so that in a train on the thread. 5 First, the thread return spring 13 is compressed until an equilibrium of forces sets and subsequently the thread drum 4 can be unwound when the tensile force on the thread 5 is increased.

Also in this embodiment, either the feed arm 3 can be rotatably mounted on the arm holder 2 or the arm holder 2 can be rotatable about an axis of rotation D at least with its upper part. For this purpose, for example, the upper component of the arm holder 2 have a joint that realizes the rotation.

Alternatively, the connection between the upper component and the lower component of the arm holder 2 can be used as a joint. So that a determination in height is possible, the column lock 25 may be formed so that at different heights, the upper component has circumferential grooves. The clamping screw of the column lock 25 then engages in these grooves, but without touching the groove bottom. Thus, a height fixation can be realized while maintaining the rotation. So that the grooves in adjusting the height in each case behind the passage opening for Registered writing the clamping screw are arranged locking means may be provided so that the corresponding position can be easily found. Furthermore, the clamping screw can be sharpened in the front area, so that after a coarse adjustment of the height, the pairing between clamping screw and groove finds itself.

In another embodiment, of course, the joint may also be provided in the lower, sleeve-like component of the arm holder 2. Here, for example, instead of the illustrated welded joint, the lower sleeve of the arm holder 2 may be rotatably supported in a further sleeve. This joint can also be provided with a locking means.

In a fourth sectional plane of the upper feed arm 3 is shown uncut. Here it can be seen that the thread take-up 10 extends in the form of a slot through both the sleeve and the piston. Since the piston is wrapped by the coil spring, a slotted sleeve is not absolutely necessary because for changing the yarn package 4 in this embodiment, the piston is pulled out of the sleeve, then then the thread 5 is inserted into the piston and preferably in a front, temporary holder is clamped. Then, the piston, is attached to the rear end of the bobbin holder 6 with the thread drum 4, are inserted into the sleeve, so that at the same time the thread 5 is missing through the sleeve therethrough. Subsequently, the user can remove the thread 5 from the temporary lock and pull off to the front.

If, even without dismantling the piston, the thread 5 is to be exchangeable, instead of the thread return spring 13 wound around the stepped region of the piston, one or more smaller thread return springs 13 can be used, which are arranged laterally next to the stepped region. In this case, the thread 5 can also be inserted in the assembled state through the slot-like thread take-up 10.

The temporary locking can then also be used as a locking means to lock the thread 5 there again after use, so that the thread return spring 13, the thread 5 is not completely retracts when the protruding from the feed 3 end of the thread 5 should be too short , Usually, however, a front locking of the thread will not be necessary because the spring travel of the thread return spring 13 is limited and is usually much shorter than the piece of thread 5, which hangs out of the front end of the Zuführarms 3.

LIST OF REFERENCE NUMBERS

1

Base

2

armholder

3

supply arm

4

bobbin

5

thread

6

spool holder

7

First stop of inner coil mobility

8th

Second stop of inner coil mobility

9

end limits

10

thread take-up

11

yarn drum

12

tumbler holder

13

Thread return spring

14

Armhaltering

15

Thread coil insert

16

Return spring

17

insertion end

18

Rest Help

19

Thread passage

20

thread eye

21

thread safety

22

swivel

23

locking pin

24

Thread roll magazine

25

Säulenarretierung

D

Rotary axis of the arm holder

Claims (14)

Thread feeding device for providing threads (5) to a weaving station with A base (1), At least one arm holder (2) attached to the base (1), • at least one, on the arm holder (2) arranged Zuführarm (3) for grip-appropriate provision of the threads (5) and with • At least one, a wound yarn reservoir carrying and about a rotation axis (D) rotatable yarn package (4), wherein • the thread (5) by pulling on the thread (5) and the consequent unwinding of the thread bobbin (4) from the thread bobbin (4) by a on the feed arm (3) arranged thread guide through in a take-off direction is deductible and wherein A tensioning means is provided which is able to tension the thread (5) in a direction opposite to the withdrawal direction,
characterized in that
the thread bobbin (4) is mounted on a bobbin holder (6) arranged on the feed arm (3), wherein at least one thread return spring (13) limited in its deflection capability by a first stop (7) is provided for forming the tensioning means is that it is deflected at a sufficient for the removal of the thread (5) acting on the thread (5) tensile force, and the thread bobbin (4) is mounted such that there is a unwinding the opposite braking force, which is greater than that Spring force of the thread return spring (13). A yarn feeding device according to claim 1, characterized in that the yarn feeding device comprises a drum holder (12) rotatably mounted on the bobbin holder (6) and one between the first stopper (7) and a second stopper (8) against the force of the yarn return spring (13) - And movable, on the drum holder (12) about a to the axis of rotation of the drum holder (12) concentric axis of rotation rotatable thread drum (11). Thread feeding device according to one of the two preceding claims, characterized in that the arm holder (2) is formed as a hollow cylinder and the yarn package (4) is arranged in the arm holder (2), wherein the hollow cylindrical arm holder (2) to the outlet of the thread (5) has an outlet window associated with each of the feed arms (3). A yarn feeding device according to the preceding claim, characterized in that a thread bobbin insert (15) which can be inserted into the hollow cylindrical arm holder (2) is provided, on which a yarn bobbin (4) is respectively provided, corresponding to the number of supply arms (3) arranged on the arm holder (2) the force of an associated thread return spring (13) is rotatably mounted. Thread feeding device according to claim 1, characterized in that the bobbin holder (6) on the feed arm (3) is movably mounted in the withdrawal direction against the force of the thread return spring (13). Thread feeding device according to claim 1 or claim 5, characterized in that the thread bobbin (4) is movably mounted on the bobbin holder (6) at least in the withdrawal direction against the force of the thread return spring (13). A yarn feeding device according to any one of the preceding claims, characterized in that the arm holder (2) has a lower portion rotatably connected to the base (1) and an upper portion carrying the feed arm (s) (3), the lower portion and the upper portion Area are rotatably and / or pivotally connected to each other. Thread feeding device according to one of the preceding claims, characterized in that the arm holder (2) is adjustable in its length, in particular designed as a telescopic rod. Yarn feeding device according to one of the preceding claims, characterized in that the thread (5) is passed through the hollow feed arms (3) and also led out of a front outlet. Thread feeding device according to one of the preceding claims, characterized in that the supply arms (3) in the front region a clamping device for clamping receiving the thread (5) when not in use. Thread feeding device according to one of the preceding claims, characterized in that the feed arms (3) along their lateral surface from back to front extending slot as a thread receiving means (10) through which the thread (5) in the feed arms (3) can be inserted. Thread feeding device according to one of the preceding claims, characterized in that the feed arms (3) are designed as hollow telescopic rods. Yarn feeding device according to one of the preceding claims, characterized in that the feed arms (3) consist of at least two segments which can be joined together, wherein a first segment is connected to the arm holder (2), while at least one further segment for individual extension along first segment between two stops is slidably mounted in the first segment and the thread return spring (13) is arranged such that it pushes apart at least two of the segments of the feed arm (3). A yarn feeding device according to claim 13, characterized in that the yarn return spring (13) designed as a helical spring is disposed between the first segment and a second segment of the feed arms (3) in an area in which the first segment and the first segment surround second segment are inserted into each other, wherein the thread return spring (13) is supported with a first end to the first segment and with a second end to the second segment.

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