EP3214029B1 - Yarn traversing device for a winding device in a textile machine producing crosswound bobbins - Google Patents

Description

The invention relates to a Fadenchangiereinrichtung for a winding device of a cheese-producing textile machine with a yarn guide, which is connected via a toothed belt trained as Endloszugmittel to a single drive, wherein the toothed belt rotates in a largely closed housing the Fadenchangiereinrichtung and arranged laterally next to the traversing deflection wheels and a is connected to a single-motor driven drive wheel.

To produce a textile cross-wound bobbin, it is known that it is necessary for the textile bobbin in question to be set in rotation on the one hand, and for the yarn running on the bobbin to be changed relatively quickly along the bobbin axis during the winding process on the other hand. The resulting textile bobbins then have so-called Kreuzbewicklungen and are characterized not only by a relatively stable bobbin, but also by a good flow behavior.

In connection with the production of such cheeses, various thread-changing devices have long been known, which are described in some detail in numerous patent applications.

It is, for example, in automatic winder, which operate at relatively high winding speeds, widely used at the jobs as Fadenchangiereinrichtung so-called thread guide drums. Such thread guide drums each have an endless groove for traversing the running thread and at the same time drive the textile spools frictionally.

Such per se proven thread guide drums allow systemic but only the production of cheeses in the winding "wild winding". In addition, such thread guide drums are relatively expensive to manufacture and thus expensive.

In the textile industry but also cross-wound producing textile machines with winding devices are known, which also allow the production of cheeses, which are wound in the winding "precision winding" if necessary.
Such textile machines have in the field of their jobs each have a means for rotating a textile spool and a separate means for traversing a tarnished thread. For example, a rotatable spool drive drum is used as a rotation device, while a mechanism often used as a thread traversing device is equipped with a so-called reverse thread drive.

In the DE 38 01 980 C2 For example, a cross-wound textile machine is described in which the jobs are each equipped with a Fadenchangiereinrichtung which has a reverse screw drum to which the thread guide of the job is connected.
Since such Kehrgewindetrommeln are usually lubricated with oil or grease, the reciprocating drum is surrounded in each case with a Kehrgewindegehäuse having a slot through which a driver or a shuttle of the thread guide projects into the groove of the reciprocating drum.
In order to prevent oil or grease from escaping from the thread guide slot of the bung thread housing or textile dust can enter through the slot in the bung thread housing, the slot of the Bend thread housing is usually using a connected to the thread guide cover, which is also known as a sealing lip, sealed.
A not insignificant disadvantage of such Kehrgewindegetriebe, however, is that even Kehrgewindetrommeln in the production are relatively expensive.
In order to reduce the manufacturing costs of such cross-spool producing textile machines, it has therefore already been proposed to simultaneously drive the yarn guides of several juxtaposed workstations of such a textile machine by means of a single reciprocating drum.

In the DE 195 36 761 A1 For example, a winder is described in which the thread guides the Fadenchangiereinrichtungen several jobs are driven by the fact that a powered by a sweeping thread guide is connected via a correspondingly long sealing lip with the yarn guides adjacent jobs.

By such a construction, although the manufacturing costs for the Fadenchangiereinrichtungen could be lowered; However, like all reverse-drive gearboxes, the embodiment described above also has the disadvantage that such counter-twisting gear units require a considerable amount of maintenance.
Another disadvantage of such Fadenchangiereinrichtungen with reverse-thread gears is that such reverse-drive gears are relatively loud in operation and that the achievable with such devices traversing speeds are relatively low.

In order to increase the traversing speed of cross-wound textile machines, therefore, it has already been proposed in the past to connect the yarn guides of the workstations via an endless traction means to a reversible electromotive single drive which can be controlled via an associated control device.

By the DE 37 34 478 A1 For example, a Fadenchangiereinrichtung is known in which a guided in the region of a job on a yarn guide rod yarn guide is connected via an endless traction means to an electric motor single drive, which is designed as a microprocessor-controlled stepper motor.
In this known Fadenchangiereinrichtung both run on a yarn guide rod yarn guide, and the endless traction means are completely free and are thus exposed to the unavoidable in Spulereien textile dust or fiber fly.

Similar exposed Fadenchangiereinrichtungen with a connected via an endless traction means to an electric motor single drive yarn guide are also in the EP 0 950 631 A1 and / or the DE 103 00 106 A1 described.

In these known Fadenchangiereinrichtungen designed as a drive belt or drive belt endless traction means is guided in each case via a drive wheel connected to a single drive and two laterally of the traversing range of the work arranged deflection wheels.

However, these per se quite advantageous Fadenchangiereinrichtungen have the disadvantage that they are very vulnerable to the unavoidable in particular in Spulereien textile dust or fluff. That is, the above-described Fadenchangiereinrichtungen require in order to be able to operate properly over a longer period, constantly a considerable cleaning effort.

Such a high cleaning effort also requires in the CH-PS 510 580 described Fadenchangiereinrichtung.
In this Fadenchangiereinrichtung two opposing yarn guides are used in the field of jobs of a winder. That is, the yarn guides are each connected to a drivable endless traction means in the form of a toothed belt, wherein one toothed belt rotate in a clockwise direction and the other toothed belt in a counterclockwise direction.
The two counter-rotating toothed belts are also guided with their teeth in each case via a plurality of deflection wheels, which are designed as toothed disks.

Furthermore, by the DE 10 2004 003 173 A1 a Fadenchangiereinrichtung for a winding device of a cheese-producing textile machine state of the art, in which the endless traction means, to which the yarn guide is connected, rotates in a largely closed housing the Fadenchangiereinrichtung. Trained as a toothed belt endless traction means is connected to a single drive, that is, the timing belt runs on laterally arranged next to the traversing deflection wheels and the drive wheel of an electric motor single drive.

The in the DE 10 2004 003 173 A1 Although described Fadenchangiereinrichtung makes a clear. Improvement of the previously known Fadenchangiereinrichtungen, in particular in terms of the necessary cleaning effort, but also has the disadvantage that constantly some special cleaning work is necessary. After a certain period of operation of the thread-changing device, difficulties often occur, for example, in the region of the continuous drawing means, especially in the region of the deflection wheels. That is, in this known Fadenchangiereinrichtung - set, despite the all-round housing, with time in the area of the teeth of the guide wheels fiber residues and dirt particles stuck, which are additionally compressed by the teeth of Endloszugmittels.
Over time, the stuck fiber residues and dirt particles cause the toothed belt to be slightly raised in the area of the deflecting wheels, with the result that negative changes in the predetermined traversing width to be covered by the thread guide occur.

Based on the aforementioned prior art, the present invention seeks to develop a Fadenchangiereinrichtung for a winding device of a cheese-producing textile machine, on the one hand ensures that it does not come to unwanted changes in the traversing width of the yarn guide even after prolonged operation, and in the In addition, it is ensured that the necessary for a proper operation of Fadenchangiereinrichtung cleaning effort can be minimized.

This object is achieved by a Fadenchangiereinrichtung in which the toothed belt is guided with its toothing on pulleys, each having a smooth running surface. For the exact form-locking drive of the toothed belt, it is sufficient if the drive wheel connected to the electric motor drive has a toothing that corresponds to the toothing of the toothed belt, which is made of a highly elastic, relatively wear-resistant material.

The embodiment according to the invention has the advantage that it can be ensured in a relatively simple manner by means of such a design that in the region of the closed housing of the thread-switching device on the deflection wheels, that is, on the components that are important for proper compliance with a given traversing width of the yarn guide, no fiber remains or the like. Can set. On the contrary, the design of the deflecting wheels according to the invention leads to the fact that any dirt particles that may have reached the running surface of the deflecting wheels are immediately removed again by the toothing of the relatively rapidly moving endless drawing means. That is, by dispensing with the previously common teeth of the pulleys it comes to a self-cleaning effect and it is ensured that the specified traversing width of the yarn guide is reliably maintained without additional cleaning effort over a very long period of operation.

In an advantageous embodiment it is provided that the smooth running surface of the deflection wheels is enclosed in each case by an upper and a lower guide ring.
By such an embodiment is reliably prevented that the endless traction means may unintentionally start during spinning operation on parts of the surrounding housing, which would have a very negative effect in particular on the service life of the endless draw means, but also on the condition of the housing of the Fadenchangiereinrichtung. That is, the guide rings on the pulleys ensures that the endless draw means is always properly guided during the spinning process.
The deflection wheels equipped with a smooth running surface and an upper and a lower guide ring are positioned laterally next to the traversing region of the thread guide at a small distance from front wall sections of the housing of the thread traversing device so that the endless traction means forms a seal for the thread traversing device in the area between the deflection wheels. This means that the deflection wheels designed according to the invention not only attempt to prevent dust particles and fiber fly from penetrating into the housing of the thread-changing device during the spinning process, but the design of the deflection wheels according to the invention also ensures that any penetrations may have occurred Fiber fly can not stick to the pulleys.

Furthermore, it is advantageous to use a defined controllable stepper motor as an electric motor drive, which is connected via a control line to a control computer.
Such a stepper motor is a proven in textile machinery, cost-effective mass-produced component, which ensures in conjunction with a control computer over a long period of operation proper operation of the Fadenchangiereinrichtung.

In an advantageous embodiment, the thread-changing device is further designed as a modular component in the form of a thread guide unit, which is completely replaceable when needed. That is, the Fadenchangiereinrichtung the winder can be removed if necessary after loosening a few fastening screws completely easily from a job of a cheese-producing textile machine and just as easily a new thread guide unit can be reinstalled.

The invention will be explained in more detail with reference to an embodiment set forth in the drawings.

Fig. 1

in Seitenansicht eine Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine mit einer erfindungsgemäßen Fadenchangiereinrichtung im Bereich der Spulvorrichtung,

Fig. 2

in einer perspektivischen Vorderansicht sowie in einem größeren Maßstab eine erfindungsgemäße Fadenchangiereinrichtung in geschlossenem Zustand,

Fig. 3

in einer perspektivischen Rückansicht die erfindungsgemäße Fadenchangiereinrichtung ohne obere Abdeckung,

Fig.4

eine perspektivische Ansicht auf eine Umlenkrolle.

It shows:

Fig. 1

in side view, a workstation of a cheese-producing textile machine with a Fadenchangiereinrichtung invention in the field of winding device,

Fig. 2

in a perspective front view and on a larger scale a Fadenchangiereinrichtung invention in the closed state,

Fig. 3

in a perspective rear view of the invention Fadenchangiereinrichtung without top cover,

Figure 4

a perspective view of a pulley.

In FIG. 1 is one half of a cross-wound producing textile machine, in the present embodiment, an open-end rotor spinning machine 1, is shown.
Such open-end rotor spinning machines 1, which are known per se, have a multiplicity of workstations 2 arranged in a row next to one another, which are generally identical.
The jobs 2 are each equipped with an open-end rotor spinning device 3 and a winding device 4.
As is known, in the open-end rotor spinning device 3, a sliver 6 stored in a sliver can 5 is spun into a yarn 7, which is subsequently wound on the winding device 4 to form a cross-wound bobbin 8.

As in Fig.1 indicated, the winder 4 for this purpose each have a creel 9 for rotatably supporting the cheese 8, a winding drum 10 for rotational, frictional driving of the cheese 8 and a Fadenchangiereinrichtung 11th
In the illustrated embodiment, the winding drum 10 is connected to an electric motor single drive 21.

Such open-end rotor spinning machines 1 are usually further equipped with a cross-bobbin transport device 12 for disposing of the packages 2 finished on the work stations 2.
On or on the open-end Rotorspinrimaschine 1 is also often, for example, on guide rails 13, 14 and a support rail 15 movable, a service unit 16, such as a cheese winder or a piecing arranged, the drive 17 rollers 18 and a support wheel 19 has. The supply of the service unit 16 with electrical energy, for example via a drag chain or, as indicated in the exemplary embodiment, via a sliding contact device 20th

Such service units 16 are, as is known, movable along the workstations 2 of the open-end spinning machine 1 and engage automatically when there is a need for action at one of the workstations 2.
Such a need for action exists, for example, if at one of the jobs a cross-wound bobbin 8 has reached its prescribed diameter and must be replaced with a new empty tube, or if at one of the jobs 2 a yarn breakage has occurred and the job 2 must be re-spun.

The Fig. 2 shows a front perspective view of one of the in the area of the winding devices 4 of the work stations 2, inventively designed Fadenchangiereinrichtungen 11.
These Fadenchangiereinrichtungen 11 are, as can be seen, each formed as a compact, closed yarn guide unit 22. That is, the Fadenchangiereinrichtungen 11 each have a closed housing 23, in the interior 37, a toothed belt transmission 27 is installed for a yarn guide 25.
The interior 37 of the housing 23 of the threading device 11, which is bounded by a rear wall and side walls 28, 29 and covered with a cover element 24, is protected on its front side by a continuous draw 30 against the ingress of textile dust and fiber fly.
As can be seen, the yarn guide 25, which, as usual, is made of an abrasion-resistant material, preferably a Oxydkeramik, fixed to a guide shoe 26, which in turn on the outer side 40 of a Endloszugmittels, preferably a toothed belt 30, is attached.
The toothed belt 30 is connected to an electromotive, reversible drive 34, which is connected via a control line 36 to a control computer 36.
By appropriate control of the electromotive, reversible drive 34, preferably a stepping motor, the control computer 36 ensures that the yarn guide 25 traverses during winding in a defined adjustable traversing B and thereby ensures that the thread 7 evenly in intersecting layers on the Cheese 8 is wound up.

Laterally next to the traversing region B of the yarn guide 25 are, as described below with reference to Figure 3 will be explained, according to the invention formed deflecting wheels 31, 32 of a toothed belt 27 arranged.

The Fig. 3 shows that through the Fig.2 known, designed as a compact thread guide unit 22 Fadenchangiereinrichtung 11 in a rear perspective view and without the cover member 24. That is, the Figure 3 shows a view into the interior 37 of the Fadenchangiereinrichtung 11, in which the toothed belt transmission 27 is arranged for the yarn guide 25.
As can be seen, the toothed belt 30 is guided in the illustrated embodiment via two deflection wheels 31, 32 designed according to the invention and a drive wheel 41.
That is, the toothed belt 30 passes over two, laterally adjacent to the traversing region B of the yarn guide 25 arranged deflection wheels 31, 32, which are each equipped with a smooth running surface 33 and an upper 39 and a lower 43 guide ring and a provided with a toothed drive wheel 41, which is non-rotatably mounted on the motor shaft 42 of an electromotive, reversible drive, preferably a stepping motor 34, is arranged.
The stepper motor 34 is connected via a control line 36 to a control computer 35, for example, a central computer of the textile machine, and can be controlled via this defined.
In an alternative embodiment, a section computer or a separate workstation computer can of course also be used as the control computer 35.

The Figure 4 shows one of the deflection wheels 31 and 32 in detail.
As can be seen, the guide wheel 31 (32) in its central region a smooth running surface 33 which is largely resistant to contamination or is constantly cleaned during the winding process by the rapid movement of the resting Endloszugmittels 30, in particular by the teeth 38. In addition, the tread may be dirt-repellent by a surface treatment or coating.

Above and below the running surface guide rings 39 and 43 are arranged, which prevent the endless traction means 30 from sliding off the guide wheel 31 (32) and can start to adjacent components of the yarn guide unit 22.
The deflection wheel 31 (32) can also be fixed on the housing 23 of the thread-changing device 11 via an axle 45 and has a bearing device (not shown) arranged within the deflection wheel.
The bearing device can be designed, for example, as a rolling bearing or as a sliding bearing device.

Claims (5)

1. Yarn traversing device (11) for a winding device (4) of a cross-wound package textile machine (1) with a yarn guide (25) connected to a single drive (34) via an endless traction element in the form of a toothed belt (30), with the toothed belt (30) circulating in a largely closed housing (23) of the yarn traversing device (11) and being guided by deflecting wheels (31 and 32) arranged at the side of a traversing area (B) and by a drive wheel (41) connected to the single electric motor drive (34) and where a drive wheel (41) connected to the electric motor drive (34) has a set of teeth (44) that meshes with the teeth (38) of the toothed belt (30),
   characterised in that
   the toothed belt (30) along with its teeth (38) is guided by deflecting wheels (31 and 32) that both have smooth running surface (33).
2. Yarn traversing device (11) according to claim 1, characterised in that the smooth running surface (33) of the deflecting wheels (31 and 32) are both framed by an upper (39) and lower (43) guide ring.
3. Yarn traversing device (11) according to claim 1, characterised in that the toothed belt (30) is made of a highly elastic, wear-resistant material.
4. Yarn traversing device (11) according to claim 1, characterised in that the electric motor drive (34) is designed as a stepper motor controlled in a defined manner and is connected to a control computer (35) via a control line (36).
5. Yarn traversing device (11) according to claim 1, characterised in that the yarn traversing device (11) is designed as a compact, modular component in the form of a yarn guiding unit (22) that can be completely exchanged if necessary.

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