EP3090975A1 - Splicer with loop former for release length setting and for thread withdrawal and winding station and bobbin winding machine with such a splicer - Google Patents

Abstract

The invention relates to a splicer (8) for splicing an upper (4 ') and lower thread (4 "), comprising a splice channel (26), an upper thread clamp (30) and an upper cutter (32) above and a lower thread clamp (34) and a lower cutter (36) below the splice channel (26), an upper and a lower dissolution tube (38) in each case between splice channel (26) and upper (32) or lower (36) cutting device, - As well as an upper and a lower loop former (24, 40) respectively between splice channel (26) and upper (32) and lower (36) cutting device for forming a respective Auflösefadenschlaufe (50) in the lower (4 ") or upper thread ( 4 ') prior to cutting by the upper (32) and lower (36) cutting device for adjusting the respective length of release of lower (4 ") and upper thread (4') in the upper or lower dissolution tube (38), characterized, - That the upper and the lower loop forming (24, 40) for forming a respective withdrawal thread loop (51) in the upper (4 ') and lower thread (4 ") for retraction of the respective dissolved in the upper and in the upper Auflöseröhrchen (38) Thread end of upper (4 ') and lower thread (4 ") in the splice channel (26) between the thread running paths of the lower (4") and upper thread (4') are arranged .. However, the invention also relates to a winding unit and a Spooling machine with such a splicer.

Description

The invention relates to a splicer for splicing two yarn ends, e.g. the ends of a top and bottom thread of a winding unit of a winder. But the invention also relates to a winding unit and a winder with such a splicer.

As is known, splicers z. B. in the winding units of winding machines for connecting upper and lower thread of the winding unit z. B. used after a thread break or a bobbin change. The thread ends are prepared before splicing in so-called Auflöseröhrchen, wherein at least the twist of the individual threads, which make up the thread, is dissolved at the yarn ends. Thereafter, the thread ends are withdrawn until they overlap sufficiently in the splice channel of the splicer, after which the actual splicing operation is performed for thread connection. In modern splicing, both dissolution and splicing are usually carried out by means of compressed air.

For optimum splicing results, both the components of the splicer and its working parameters must be carefully selected according to the type of yarn. U. a. It depends on the one hand on the so-called dissolution lengths, so the lengths to which the ends of the two threads to be joined are dissolved in the Auflöseröhrchen, on the other hand, it depends on the overlap of the dissolved thread ends in the splice, which is determined by the withdrawal lengths is, ie by the lengths by which the threads are withdrawn after dissolution of their thread ends. In order to ensure the highest possible flexibility here, therefore, modern splicer on appropriately adjustable working elements of the winding unit to determine this Auflöse- and retraction lengths.

While it is fundamentally desirable and for some yarns also possible to combine these two functions in a single working member, namely the so-called feeders, which are each located on the side opposite the splice channel with respect to the thread end, this solution also has considerable disadvantages. which completely ban their use for many types of yarn. This is made clear here by explaining their operation for the upper thread, wherein the splice run substantially vertically and the upper thread should come from the casserole located above the splice. The situation for the bobbin thread is mirrored.

The upper thread is clamped in connection with its introduction into the splice channel of the overlying the splice channel upper thread clamp and inserted into the lower cutting device lying below the splice channel. Then the upper feeder transversely before cutting the upper thread in the threadline and thereby forms a thread loop between the splice channel and upper thread clamp, which should be called here upper Auflösefadenschlaufe. After cutting the upper thread by the lower cutter, the resulting upper thread end is sucked into the lower dissolution tube. For coarser yarns, the required looper thread loop can be increased to bring the yarn end directly into the Einzugsssogbereich the Auflöseröhrchens.

By retracting the feeder, the looper thread loop is dissolved again, and the thread end is subsequently drawn deeper into the dissolution tube, thus adjusting the disintegration length. After Fadenendauflösung the feeder moves back in the loop direction, thereby forming the so-called withdrawal thread loop, by their formation, the thread end is first pulled out of the Auflöseröhrchen and then withdrawn into the splice.

Rightly criticized DE 4005752 A1 however, in their discussion of the prior art, this dual function of the feeder, which is referred to therein as the "loop puller of the prior art". Because in the dissolution of the looper thread loops, distended by the suction in the Auflöseröhrchen, in the splice adjacent juxtaposed upper and lower thread to slip past each other to allow a deeper sucking their thread ends in the Auflöseröhrchen. In the case of threads with a non-smooth surface, ie hairy, rough and fluffy yarns, there is a risk that the fibers which protrude from the thread surfaces will catch on one another as they pass by. This results in increased frictional forces, which prevent unhindered suction of the thread ends in the Auflöseröhrchen. But this can lead to sucked in the Auflöseröhrchen each different thread lengths and can be dissolved in consequence, so different dissolution lengths arise, which then lead to a non-uniform and therefore unsatisfactory splice.

Therefore, the beats DE 4005752 A1 then also consistently a separation of the two functions of the setting of resolution and retraction lengths and assignment to different working organs of the winding unit before. The feeder ("loop puller of the prior art") while the long-assigned mechanical yarn withdrawal after Fadenendeauflösung remains while new loop pullers are proposed on the feeder each opposite sides of the splice channel for the formation of the loosening thread loops. In the case of the upper thread described in detail above, the looper thread loop is thus no longer formed above, but under the splice channel, between splice channel and lower dissolution tube. By this laying the loosening thread loops from the opposite on the same side of the splice channel as the associated Auflöseröhrchen upper and lower thread when dissolving the loosening thread loops no longer slide past each other in the splice, but the two threads can be sucked without mutual contact independently deeper into their respective Auflöseröhrchen , which allows an accurate and reproducible adjustment of their dissolution lengths.

This idea of separate loop pullers for the formation of the loops loops was also followed by the DE 4420979 A1 which contributed to a generalization of these working organs to the loop formers known there. So struck the DE 4005752 A1 specifically for the loop puller each attached to a lifting cylinder towing hook for thread engagement, the lifting cylinder could be operated with compressed air, hydraulic, electromechanical or by a servomotor. This generalized the DE 4420979 A1 then on other loop-forming principles and added concretely concrete embodiments of the loop formers as rotary wings and as pneumatic suction nozzles.

While the separate loop pullers for the looper thread loops thus solve the fundamental problems of reproducible setting of release and withdrawal lengths and were also well accepted in the prior art, these mean but an additional component next to the feeder. This is exacerbated by the fact that the actuators required for their operation are also doubled.

Against this background, it is an object of the invention to provide a less complex and therefore more cost-effective solution for the setting of dissolution and retraction lengths, without affecting their reproducibility.

• einen Spleißkanal,
• eine obere Fadenklemme und eine obere Schneidvorrichtung oberhalb und eine untere Fadenklemme und eine untere Schneidvorrichtung unterhalb des Spleißkanals,
• ein oberes und ein unteres Auflöseröhrchen jeweils zwischen Spleißkanal und oberer bzw. unterer Schneidvorrichtung,
• sowie einen oberen und einen unteren Schlaufenbildner jeweils zwischen Spleißkanal und oberer bzw. unterer Schneidvorrichtung zur Bildung einer jeweiligen Auflösefadenschlaufe im Unter- bzw. Oberfaden vor deren Schneiden durch die obere bzw. untere Schneidvorrichtung zur Einstellung der jeweiligen Auflöselänge von Unter- bzw. Oberfaden im oberen bzw. unteren Auflöseröhrchen,

dadurch gekennzeichnet,

• dass der obere und der untere Schlaufenbildner zur Bildung einer jeweiligen Rückzugsfadenschlaufe im Ober- bzw. Unterfaden zum Zurückziehen des jeweiligen im unteren bzw. im oberen Auflöseröhrchen aufgelösten Fadenendes von Ober- bzw. Unterfaden in den Spleißkanal zwischen den Fadenlaufwegen des Unter- und Oberfadens beweglich angeordnet sind.

This object is achieved by a splicer for splicing an upper and lower thread, comprising

• a splice channel,
• an upper thread clamp and an upper cutter above and a lower thread clamp and a lower cutter below the splice,
• an upper and a lower dissolution tube in each case between splice channel and upper or lower cutting device,
• and an upper and a lower loop former respectively between splice channel and upper or lower cutter for forming a respective looper thread loop in the lower or upper thread prior to cutting by the upper or lower cutter for adjusting the respective release length of lower and upper thread in the upper or lower dissolution tube,

characterized,

• in that the upper and lower loop formers are movably arranged in the splice channel between the thread running paths of the lower and upper thread to form a respective withdrawal thread loop in the upper and lower threads, respectively, for retracting the respective upper and lower thread ends of the upper and lower resolving tubes, respectively are.

In this solution, the inventor has surprisingly recognized that it is possible to combine the two functions of setting resolution and retraction lengths in a single working organ, and has thus overcome the related prejudice of the prior art. In contrast to the known from the prior art and discussed above operation of the feeder, however, it is essential for this working organ, which here because of its greater structural similarity to the embodiments of the DE 4420979 A1 also looper is called, not always on one and the same, but successively act on both threads allow. While the respective prior art feeder formed both the looper thread loop and the withdrawal thread loop in one thread, a loop former according to the invention forms first the looper thread loop in one thread and then the withdrawal thread loop in the other thread. Thus, for example, the upper looper forms first the loosening thread loop in the lower thread and then the withdrawal thread loop in the upper thread. To accomplish this, it has proven to be advantageous to arrange the loop former between the thread running paths of the lower and upper thread. Thus, the loop former can form the withdrawal thread loop, in particular by moving in the direction of the one thread while entraining the same, and by subsequently moving in the direction of the other thread while entraining the same.

The inventor thus exploits the fact that in the prior art the movements of loop formers and feeders occurred one behind the other and the upper and lower loop formers and feeders were adjacent, respectively, allowing their combination into a single working organ. However, this finding was first made by the inventor and was previously unknown in the prior art. Thus, the inventor solves a long-standing need in a surprisingly simple manner and, as required by the object of the invention, achieves the saving of a component including its actuator.

Similar to the known from the prior art loop formers, it is also advantageous here to form the loosening thread loops between dissolution tube and splice. Then, in flexible yarns and / or close proximity of the dissolution tube and cutter, the yarn is first soaked only for a length corresponding to the distance between cutter and Auflöseröhrchen, and the other thread can be controlled by the suction effect of the Auflöseröhrchens by the guided dissolution of the Auflösefadenschlaufe this will be introduced. In rigid yarns and further distance between Auflöseröhrchen and cutting device they are not immediately sucked after cutting, but the loop former must first enlarge the Auflösefadenschlaufe until the end of the thread enters the Einzugssogbereich the Auflösssöhrchens and the thread then with the thread end ahead, followed by Dissolution of the looper thread loop is sucked in. In all cases, however, the dissolution length is exactly determined by the distance between the cutting device and the dissolution tube and the size of the looper thread loop formed before cutting.

Since it is favorable anyway for an optimal Fadenendeauflösung to suck the thread with its thread end first into the Auflöseröhrchen, regardless of yarn type offers only a small distance between the cutting device and Auflöseröhrchen, since the dissolution length sufficiently flexible, even by the size of before the cutting thread loop formed, can be adjusted. This also simplifies the control of the formation of the looper thread loop and is suitable for all yarn types.

In this embodiment, in which the loosening thread loops are formed in each case between the dissolution tube and the splicing channel, the immediate sucking in of unnecessarily large thread lengths directly after cutting is avoided in any case. If one adds to this, as just described, by a close proximity of cutting device and Auflöseröhrchen, so prevents ever sucking in thread loops in the Auflöseröhrchen and thus completely avoids the unwanted weakening of the thread at the points of curvature of the thread loop in the Auflöseröhrchen.

Alternatively, preferably, the looper thread loop may be formed on one side of the splice channel between the dissolution tube and the cutting device. As a result, the advantage of a close arrangement of the Auflöseröhrchens can be used on the splice channel, whereby a needs-prepared prepared dissolved thread end needs less impact flows, shorter way to travel back into the splice channel.

At this point it should be noted that to simplify the presentation is usually spoken of an upper and lower thread and upper or lower components, which implicitly a substantially vertical orientation of the splice channel is assumed. As stated, this serves merely to simplify the presentation and is not intended to limit the generality of the claimed invention. For it is clear to the person skilled in the art that in the invention it is merely a question of the splice connection of two arbitrarily oriented threads with correspondingly aligned orientations of the components of the splicer. Similarly, below is usually of identical special versions of both loop formers spoken, which is the most practical solution in practice. However, the invention also extends to mutually different embodiments of the two loop formers, since these can be largely combined with each other due to their mutual independence.

The loop formers can structurally analogous to the prior art, such. B. from the DE 4005752 A1 or the DE 4420979 A1 known to be executed. The essential difference is merely that a loop former according to the invention has to act on both threads in succession, so that not only does it have to have a contact means to one of the threads, as in the prior art, but contact means to both threads. However, this can be developed from the prior art simply by attaching the loop former between the threads and corresponding reflection of the contact means known there.

In question so come z. B. loop puller analogous to DE 4005752 A1 , Which now have a towing hook at each end of a possibly correspondingly extended lifting cylinder instead of a towing hook at one end. In question but also the rotary wing from the DE 4420979 A1 , which now have to be able to swing not only in the direction of one of the threads, but also in the opposite direction on the other thread. Also pneumatic solutions like the suction nozzles of the DE 4420979 A1 can be realized, but then either make it alignable on both threads, or their number must be doubled. For sucking a defined length of flexible threads would be suitable attacks z. B. in the form of fine lattices in front of the suction nozzles to prevent an undefined sucking the threads. The size of the loosening thread loop would z. B. either fixed by the nozzle shape, such as. B. the length of an elongated suction slot, or by a z. B. determine transversely to the yarn path variable position of the suction nozzle.

As actuators for the loop formers, it is also possible again to use the principles known from the prior art, such as pneumatic, hydraulic, electromechanical or actuation-mediated actuation. So would z. B. with two-sided tow hook further developed air-operated lifting cylinder DE 4005752 A1 a solution with a pneumatic drawbar. A replacement of the Grasping and pulling the threads by means of the draw hooks by pushing away the threads through a transversely oriented to the thread pin or the like resulted in accordance with a pneumatically actuated push rod. However, many other alternative solutions are available to the skilled person.

Because of the mirror image movement of the upper and lower loop formers, their connection to a single component is particularly advantageous. Because this allows in addition to a considerable simplification of their construction, especially the use of a common actuator, which has a positive effect on the cost and maintenance. To connect the two loop formers are mainly mechanical, but also pneumatic solutions in question.

A particularly simple execution of this idea results from further developments of the already mentioned and from the DE 4420979 A1 Known rotary wing, so by training both loopers as a common rotary wing whose axis of rotation passes through the middle of the splice channel and perpendicular to the surface of the splicer, in which the splice channel is located. To form the loosening and withdrawal thread loops above and below the splice channel, this rotary wing only has to perform a rotational movement to both sides about its rest position, which can cause a single oscillating motor or a simple electromagnetic arrangement. For example, at both ends of a transversely extending to the axis of rotation and rotatable about this coupling rod and oriented in the direction of the axis of rotation driving pins push away the threads during the rotational movement and thereby form the desired loops. In this case, splice channel side mounted stationary retaining pins on the one hand reinforce the loop formation, but above all ensure that the thread pattern in the splice channel is unaffected by the loop formation. This is a both Schlaufenbildner simultaneously realizing very simple component with uncomplicated actuator.

Should the splicer or its surroundings in the winding unit not provide sufficient free space for such a pure rotational solution, then similar solutions with a common actuator are also feasible with purely translationally moving contact members to the filaments. So z. B. again the already discussed push or pull rods are used, which one connects to each other and their separate actuators to be replaced by a common. Specifically, the connection z. B. wheel segments proposed, whose axis of rotation passes through the middle of the splice channel and perpendicular to the surface of the splicer, in which the splice channel is located. Under wheel segments is here understood a component which can be rotated about its axis of rotation in both directions on the one hand, and on the other above and below the splice channel has a sufficiently extended circular circumference portion, the translational during the rotational movement in coupling with the side facing him moving contact members remains to the threads. Specifically, such a component then z. B. in the form of mirror-image disk segments.

As discussed above in the pure rotational solution, here is the actual actuator is an oscillating rotary motor or a corresponding simple electromagnetic arrangement which can rotate the wheel segments in both directions, which rotational motion is then converted via a gear in the translational movement of the contact members to the threads. As an example of such a gear coupling, the circumference portions of the wheel segments z. B. toothed to engage in a corresponding toothing of the wheel segments facing side of the push or pull rods. But, of course, all other implementation principles known to a person skilled in the art of rotation into a translational movement are also conceivable here and, if the space available is sufficient, the wheel segments can also be designed as a full wheel and in particular as a full gear.

Basically, the invention also includes control technology autonomous loop formers, ie loop formers that require no external control, but their actuators z. B. by a self-deposited in the loop formers mechanically or electronically coded program control. However, this has the disadvantage that when a change in movement, for. B. by a change of processing, exchanged for a different type of yarn at the winding unit either the complete splicer, or at least the program of autarkic loop formers must be adjusted.

Therefore, the invention primarily addresses loop formers with externally controllable actuators, wherein the two loop formers, as described above, can also share a single common actuator. These actuators are then sensibly controlled either by the winding station computer or by the central control the winder, the latter possibly mediated by the Spulstellenrechner. Accordingly, the operator can thus access the working parameters of the loop formers from the operating unit of the winding unit or from that of the winding machine or, to further increase the operability, even from both, ie, view and if necessary also change them.

Therefore, the object of the invention is also achieved by a winding unit with one of the splicer according to the invention described above and by a winder with such a winding unit. Advantageous embodiments result, as just stated, by controlling the loop formers by the Spulstellen- and / or the Spulmaschinenrechner.

While all of the above-described embodiments and the variations and combinations resulting therefrom for the person skilled in the art belong to the scope of the invention, it will be explained in more detail below with reference to an embodiment shown in the drawings and some of its variants.

Fig. 1

in perspektivischer Ansicht eine erste Ausführungsform eines erfindungsgemäßen Spleißers mit als Drehflügel ausgebildeten Schlaufenbildnern;

Fig. 2

schematisch in Draufsicht auf den Spleißkanal eine Weiterentwicklung der Ausführungsform nach Figur 1;

wobei dieselben Bauteile in allen Figuren mit denselben Bezugszeichen bezeichnet sind.Show it

Fig. 1

a perspective view of a first embodiment of a splicer according to the invention formed as a rotary wing loop formers;

Fig. 2

schematically in plan view of the splice a further development of the embodiment according to FIG. 1 ;

wherein the same components in all figures are denoted by the same reference numerals.

The essentially from the DE 4420979 A1 taken (and there as FIG. 2 numbered) FIG. 1 shows a perspective view of a first embodiment of a splicer 8 according to the invention, which was obtained by appropriate development of the formed as a rotary wing 24 loop former of this prior art. In addition to the splicer 8 are also shown: the swivel nozzle 16 for picking up the upper thread 4 'from the (not shown) casserole and the suction tube 20 with its suction port 21 for the corresponding approach leading the lower thread 4 "of the (not shown) delivery bobbin, all as possible components of a winding unit of a winder. Also indicated are the upper thread 4 'and the lower thread 4 ".

The splicer 8 initially has its usual components: the splice prism 25 fastened with bolts 43 to the air distributor block 42 with the splice channel 26 and its splice air connection 45 as well as above and below directly adjacent thread guide plates 27; in each case in extension of the splice channel 26 in the air distributor block 42 embedded dissolution tube 38; the top and bottom of the air distribution block 42 arranged cutting devices 32 and 36 with the upper cutting device 32 in the figure also recognizable actuating mechanism 33; and the upper and lower thread clamp 30 and 34 with their actuating mechanisms 31 and 35, respectively.

The loops of the DE 4420979 A1 , which had the sole task of forming the looper thread loops are executed in the figure as a rotary wing 24 with extending through the middle of the splice channel and perpendicular to the surface of the splicer containing it rotating axis. Each of the attached at the two ends of the rotary wing 24 and parallel to the axis of rotation driving pins 40 is always rotated to form the Auflösefadenschlaufen only against one of the threads, so z. When the rotation of the rotary wing 24 so the driving pins 40 each capture their associated thread and take it into the respective associated recess 39 in the splicing prism 25. So takes for example in the view of FIG. 1 the upper driving pin 40 in the clockwise rotation with the lower thread 4 "to the right in the right above the splice prism mounted 25 recess 39. The thereby in the thread, so here in the lower thread 4", formed Auflösefadenschlaufe is further increased by the fact that the thread splice channel side is retained by a stationary retaining pin 41. Above all, however, the retaining pins 41 are attached in such a way that the loop formations do not change the course of the upper and lower thread 4 'or 4 "in the splicing channel.

In order now to the rotary wing 24 of DE 4420979 A1 In order to further develop to a loop former according to the invention, essentially only care must be taken that the rotary vane 24 must now be able to pivot sufficiently far in both directions of rotation. For this purpose, on the one hand a corresponding drive is necessary, and on the other are mirror images of the existing recesses 39 in the splicing prism 25 there provide further recesses 39 '. These additional recesses 39 'must be deep enough to allow sufficient rotation of the rotary wing 24 against the other thread, so that the desired withdrawal lengths for the threads are also achieved.

After forming the looper thread loops and their redissolution by turning back to their original positions for complete thread end resolution in the Auflöseröhrchen the rotary wing in addition to DE 4420979 A1 According to the invention thereafter but the further function of retracting the threads 4 'and 4 "in the splice channel 26 by turning in the other direction, for example, turns the upper driving pin 40 in the view of the figure to the left and now takes the upper thread 4' in the left above in the splicing prism 25 mounted recess 39 'with, until the desired retraction length for the upper thread 4' is reached, so the yarn end is in the desired position for splicing splice channel 26. For this purpose, the retaining pins 41 corresponding (not shown (but FIG. 2 )) more pins are attached to retain the threads on this page and thus on the one hand to increase the withdrawal thread loops and on the other hand to prevent interference of the thread pattern in the splice 26 by the loop formation.

The drive of the rotary wing 24 can, as in the DE 4420979 A1 described, are effected by a mounted on the periphery of the rotary wing 24 drive unit. In this case, the upper and lower driving pins 40 are connected to one another at the ends of the rotary wing 24 by a construction which is substantially circular in shape at its periphery, to which the drive unit is then coupled. Alternatively, however, also acting directly on the axis of rotation drive concepts are feasible.

FIG. 2 schematically shows in plan view of the splice a further development of the embodiment according to FIG. 1 , in which again the operation of the invention will be explained in detail. In contrast to FIG. 1 the splicing prism 25 was executed here round, which saves the recesses 39, 39 '. Furthermore, the retaining pins 40 were connected directly by a simple coupling rod, which arrangement is also integrally executable. In order not to hinder the insertion of the threads 4 ', 4 "into the splicing prism 25 and their subsequent sliding out, a gap can be placed between, for example, in the area of the axis of rotation and above and below it Leave splicing prism 25 and air distributor block 42 and attach the coupling rod therein. Alternatively, however, is here, in the round splice prism 25 even relatively simple executable, circular ring connection, similar to in the DE 4420979 A1 , makeable.

Parts (a) to (d) of FIG. 2 then show the most important stations of the rotary vane 24 and the threads 4 ', 4 "from the thread insertion into the splicing prism 25 until just before the actual splicing process began In part (a) the threads 4', 4" were just into the splice channel 26 of the splicing prism 25 and in the thread clamps 30, 34 and the cutting devices 36, 32 inserted. The rotary wing 24 is in its starting position.

In part (b), the rotary vane 24 has been rotated clockwise about its axis of rotation 24 ', with its driving pins 40 for forming the looper thread loops 50 to bend the threads 4', 4 "around the retaining pins 41. For this purpose, the thread clamps 30, which are now closed, slide. 34 each held on the coil side threads 4 ', 4 "through the still open cutting devices 36, 32 back. The geometric arrangement of the components and the size of the rotational movement are designed so that the threads 4 ', 4 "are in the catchment area of the dissolution tube 38 after the loom thread loops 50 are formed Threads 4 ', 4 ", at the latest at this moment the compressed air is applied to the Auflöseröhrchen 38, so that the threads 4', 4" can not leave their Einzugsssogbereich.

The thread ends of flexible threads 4 ', 4 "are then in any case immediately, if necessary, first sucked into the dissolution tube 38 to form a thread loop., By contrast, disruptive yarns are only immediately and with the thread ends sucked into the dissolution tube 38, if Otherwise, the rotary vane 24 retracts the threads 4 ', 4 "by increasing the size of the looper thread loops 50 until their thread ends reach the respective draw-in area of the dissolution tubes 38, whereupon they then move with the Thread ends are sucked ahead in this. However, in order to always draw flexible yarns with their thread ends first into the dissolving tubes 38 and to simplify the processes, it is thus always advisable to have a close proximity of dissolving tubes 38 and cutting devices 36, 32, the dissolution lengths then being determined essentially by the sizes of the unwinding loops 50 become.

After sucking the thread ends of the threads 4 ', 4 "in the Auflöseröhrchen 38 of the rotary wing 24 pivots counterclockwise back to its original position, the Auflösefadenschlaufen 50 dissolved and the thread ends deeper into the Auflöseröhrchen 38 sucked in and thereby resolved to their desired lengths. Part (c) of the FIG. 2 shows this situation with the rotary wing 24 back to its original position and the soaked in their entire dissolution lengths in the Auflöseröhrchen 38 threads 4 ', 4 ".

After the yarn end has been released, the rotary blade 24 now rotates further counterclockwise, and its driving pins 40 now bend the respective other of the threads 4 ', 4 "around the retaining pins 41' to form the withdrawal thread loops 51. The thread ends of the thread clamps 30 are still closed , 34 each held on the coil side threads 4 ', 4 "direction splicing prism 25 withdrawn. Part (d) of the FIG. 2 shows the situation after complete yarn retraction, in which the dissolved areas 46 ', 46 "of the threads 4', 4" in the splice 26 and the actual splicing operation can be performed, after its completion, the rotary wing 24 brought back into its original position and the Threads 4 ', 4 "are released from the splicing prism 25 in the usual way.

In addition to the described embodiments of the invention, which also can be combined largely freely, many other variants are feasible for the skilled person, all of which belong to the scope of the claimed invention. So can be z. B. implement by respective replacement of the driving pins 40 by gear segments at the ends of the coupling rod and correspondingly toothed push rods, the rotational movement of the coupling rod in a translational movement of the push rods.

Further, for the sake of completeness, it should be pointed out that the indefinite article does not exclude that components designated by it can not also be present multiple times. Likewise, the description of a particular component does not necessarily mean that its functions could not be distributed among several alternative components, or that the functions of several described components could not be grouped together.

Claims (9)

Splicer (8) for splicing a top (4 ') and bottom (4 ") thread a splice channel (26), an upper thread clamp (30) and an upper cutter (32) above and a lower thread clamp (34) and a lower cutter (36) below the splice channel (26), an upper and a lower dissolution tube (38) in each case between splice channel (26) and upper (32) or lower (36) cutting device, - As well as an upper and a lower loop former (24, 40) respectively between splice channel (26) and upper (32) and lower (36) cutting device for forming a respective Auflösefadenschlaufe (50) in the lower (4 ") or upper thread ( 4 ') prior to cutting by the upper (32) and lower (36) cutting device for adjusting the respective length of release of lower (4 ") and upper thread (4') in the upper or lower dissolution tube (38), characterized, - That the upper and the lower loop forming (24, 40) for forming a respective withdrawal thread loop (51) in the upper (4 ') and lower thread (4 ") for retraction of the respective dissolved in the upper and in the upper Auflöseröhrchen (38) Thread end of upper (4 ') and lower thread (4 ") in the splice channel (26) are each arranged between the yarn paths of the lower (4") and upper thread (4'). A splicer (8) according to claim 1, characterized in that the two loop formers (24, 40) are arranged such that they each form the looper thread loops (50) between the dissolution tube (38) and the splice channel (26). Splicer (8) according to claim 1 or 2, characterized in that the two loop formers are each designed as pneumatically actuated push or pull rods. Splicer (8) according to claim 1 or 2, characterized in that the two loop formers (24, 40) are connected to each other for the execution of their loop formations and have a common actuator. Splicer (8) according to claim 4, characterized in that the two looper (24, 40) as a common rotary vane (24) are formed, whose axis of rotation (24 ') through the center of the splicing channel (26) and perpendicular to the surface of the splicer (8), in which the splice channel (26) is located. Splicer (8) according to claim 4, characterized in that the two loop formers are each formed as push or pull rods which are interconnected by wheel segments whose axis of rotation (24 ') through the middle of the splice channel (26) and perpendicular to the surface of the splicer (8), in which the splice channel (26) is located. Splicer (8) according to claim 1 or 2, characterized in that the two loop formers (24, 40) each have one or a common controllable actuator for carrying out their loop formations. Spooling unit with a splicer (8) according to claim 7 and a winding unit control for controlling the respective actuators or the common actuator of the two loop formers (24, 40). A winder with a splicer (8) according to claim 7 and a winder control for controlling the respective actuators or the common wedge member of the two loop formers (24, 40).

Images