JP2006335573A - Yarn traverse device for winder of fiber machine for manufacturing traverse-winding bobbin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To minimize vibration of a yarn laying arm of a finger-shaped guide when laying yarn on the other hand, by attaining a high traverse speed of winding yarn in the one hand, by improving a yarn traverse device having the finger-shaped guide for a winder of a fiber machine for manufacturing a traverse-winding bobbin. <P>SOLUTION: The problem of this invention is the yarn traverse device for the winder of the fiber machine for manufacturing the traverse-winding bobbin, and is solved by supporting the finger-shaped yarn guide 13 with a vibration damper 20 by its yarn laying arm 18 in the form of having a yarn guide to be supplied on a rotatingly drivable winding bobbin by traverse motion, of being movably supported by restricting the yarn guide with a revolving shaft as the center and of being constituted as the finger-shaped yarn guide 13 capable of applying a load by an electric motor type driving device. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is a yarn traversing device for a winding device of a textile machine for manufacturing a traverse bobbin, and has a yarn guide for supplying a yarn by traverse motion onto a winding bobbin that can be driven to rotate. Further, the present invention relates to a type in which the yarn guide is configured as a finger-type yarn guide that is supported by an electric motor type driving device and is supported so as to be movable with a rotation axis being limited.

  In order to produce fiber bobbins, in particular so-called traverse bobbins, at least two prerequisites must be fulfilled, as is well known. One is that the fiber bobbin needs to be rotated in order to wind the yarn around the bobbin body, and the other is that the yarn wound on the rotating fiber bobbin is given a traverse motion along the bobbin axis. It is necessary. Since modern textile machines operate at a relatively high winding speed when manufacturing a traverse bobbin, the traversing apparatus must also be able to achieve a high traverse speed.

  Such traversing devices of the type capable of imparting a traverse motion to a fiber yarn at high speed have been known for a long time in the textile machinery industry and are described in detail in the patent literature in various embodiments.

  DE 4310905 A1 describes, for example, a so-called belt type yarn guide. Such a belt type yarn guide is provided with a plurality of yarn entrainers and alternately moves in order to lay the yarn wound around the winding bobbin alternately from one side of the winding bobbin to the other side. Have two belt strands.

  In such a known belt type yarn guide, yarn delivery in the yarn reversal region is recognized as a defect. That is, such a belt type yarn guide often has a problem in yarn delivery.

  Furthermore, yarn guide drums configured as grooved drums are widely used in automatic traverse winding machines that operate at high speed. The yarn guide drum simultaneously drives the circumferential surface of the traverse bobbin via a frictional connection in addition to traversing the yarn. For example, in a device of the type described in DE 4237860 A1, for example, a traverse bobbin can only be wound in a winding form of “wild winding”. In other words, the winding ratio of the winding bobbin wound in this case decreases as the bobbin diameter increases during the winding process. Further, in such a yarn guide drum, the same yarn winding angle is always given regardless of the bobbin diameter, and so-called ribbon winding occurs if no special treatment is adopted at a predetermined winding ratio. In order to avoid this ribbon winding, a number of special ribbon winding breaking methods have already been developed.

  A constant or at least temporarily constant ratio is maintained between the bobbin speed and the yarn traversing speed during the winding process to form a bobbin having a predetermined winding pattern, for example precision or step precision winding. It must be.

  In order to form a bobbin having a winding as described above, it is necessary to separate the driving of the bobbin from the driving of the yarn traversing device.

  Winding devices in which the driving of the winding bobbin is separated from the driving of the yarn traversing device are described, for example, in DE 1 1985 548 A1 and DE 1996 0024 A1. This known winding device has a bobbin driving device that can be loaded by a single motor and a yarn traverse device that can be driven individually. In this case, this known winding device has a yarn laying arm. The driving of the so-called finger-shaped yarn guides described in DE19820464A1, DE103332399A1 or EP0838422B1 is carried out by an electric motor type individual driving device. In order to optimize the shape of the yarn laying arm, the inertia of the yarn traversing device can be reduced so that very high traversing frequencies can be achieved with such a yarn traversing device.

Of course, in this case, it has been confirmed that the yarn passing through the yarn traversing device at a high speed causes vibrations in the relatively low weight yarn laying arm of the finger-shaped yarn guide. This vibration can significantly hinder yarn laying and thus reduce the quality of the traverse bobbin that is to be manufactured.
DE4310905A1 Specification DE4237860A1 specification DE19858548A1 Specification DE 19960024A1 Specification DE19820464A1 Specification DE103332399A1 specification EP0838422B1 Specification

  Starting from the aforementioned prior art, the object of the present invention is to improve a yarn traversing device with a finger-shaped yarn guide for a winding device of a textile machine for producing a traverse bobbin, on the one hand being wound It is possible to achieve a high traverse speed of the yarn, while ensuring that the yarn laying arm of the finger-type yarn guide does not vibrate during the yarn laying.

  The object of the present invention has been solved by the features described in the characterizing part of claim 1.

  Advantageous embodiments of the invention are the subject of the dependent claims.

  A stationary vibration attenuator is used, and the free length of the yarn laying arm is significantly shortened by supporting the yarn laying arm of the finger-shaped thread guide during the yarn laying. This has a positive effect on the bending stiffness of the yarn laying arm. In this case, the moment of inertia of the finger thread guide is not increased. In other words, the vibration attenuator of the present invention avoids that the friction of the traveling yarn in the yarn guide slit of the yarn laying arm vibrates the yarn laying arm, and this vibration has a very unfavorable effect on the winding process. .

  In this case, in an advantageous embodiment of the present invention (Claim 2), the vibration attenuator is arranged downstream of the yarn laying arm in the yarn traveling direction.

  In such an arrangement, the yarn laying arm is pressed against the vibration attenuator with a substantially constant and of course relatively low pressing force by the traveling yarn, and is supported uniformly during the yarn traversing process by this vibration attenuator. To be guaranteed.

  As claimed in claim 3, the vibration damper is advantageously arranged in such a way that the free length of the yarn laying arm is reduced to approximately one third of the total length (L). That is, the lever arm in which the bending force acting on the yarn laying arm due to the yarn friction becomes effective is reduced to approximately 1/3 of the original length. As a result, as already mentioned above, the bending stiffness of this component is positively affected and harmful vibrations are avoided.

  According to the fourth and fifth aspects, the vibration attenuator is configured as a circular ring segment, and is fixed to the front side of the motor casing of the electric motor type driving device of the finger-shaped thread guide. The circular ring-like configuration of the vibration attenuator ensures that a substantially uniform state is given over the entire yarn traversing width. That is, the leverage ratio of the yarn laying arm is kept equal during yarn traversing. Furthermore, the circular ring-shaped configuration of the vibration attenuator optimizes the attachment of the vibration attenuator to the circular motor casing of the yarn guide drive. In this case, the vibration damper can be fixed directly to a suitable blanket of the motor casing, for example with a suitable adhesive.

  Of course, a removable attachment of the vibration damper to the motor casing as described in claim 6 is also conceivable.

  In one such example, a vibration attenuator made of a resistive and slippery material, such as polytetrafluoroethylene, as described in claim 7, is provided via a screw pin or the like, for example. It is fixed on a support fixed to the motor casing. Such a device has an almost infinite life because the mechanical load of the vibration attenuator by the yarn laying arm is relatively low. Furthermore, vibration dampers coated with polytetrafluoroethylene can be made relatively cost-effectively and work very reliably under any operating conditions.

  Advantageously, as indicated in claim 8, the yarn laying arm of the finger-shaped yarn guide has a sliding element which cooperates with a vibration damper. The sliding element, which likewise advantageously has a coating made of polytetrafluoroethylene, further reduces the frictional resistance between the yarn laying arm and the vibration damper. That is, the frictional resistance between the yarn laying arm and the vibration attenuator can be further reduced.

  Hereinafter, the present invention will be described in detail based on one illustrated embodiment.

  FIG. 1 schematically shows a textile machine for producing a traverse bobbin, in this case a working part 2 of a so-called automatic traversing machine 1 in a side view. In such a work part 2 of the automatic traverse winding machine 1, the spinning cup 3 produced by the ring spinning machine is rewound onto the large-capacity traverse bobbin 5 in a form that is publicly known and not described in detail. It is The traverse bobbin 5 is handed over to a machine-length traverse bobbin conveying device 7 by a service device that automatically operates after manufacture, preferably a traverse bobbin changer (not shown), and is moved to the machine end side. Delivered to a deployed bobbin loading station or the like.

  Such an automatic traversing machine 1 usually has a logic device in the form of a bobbin and a winding tube conveying system 6. In the bobbin and winding tube transfer system 6, the spinning cup 3 or an empty winding tube circulates on the transfer tray 11.

  Of the bobbin and winding tube transfer system 6, FIG. 1 shows only a cup supply section 24, a reversibly drivable storage section 25, a lateral transfer section 26 leading to the work site 2, and a winding tube return section 27. .

  Each work site 2 of the automatic traverse machine 1 has a work site calculator 28 connected to the central control unit via a bus connection and various other devices necessary for the orderly operation of the work site 2. ing.

  One of the devices known per se is, for example, the winding device 4. Such a winding device 4 has a bobbin frame 8 that is supported movably around a turning shaft 12. As shown in FIG. 1, the traverse bobbin 5 held by the bobbin frame 8 so as to be freely rotatable is supported on the support and driving roller 9 on the surface thereof during the winding operation. This support and drive roller 9 is loaded by an electric motor 33. At that time, the electric motor 33 is connected to the work site calculator 28 via the control lead 35.

  A yarn traversing device 10 is provided to impart traverse motion to the yarn 16 during the winding process. The yarn traversing device 10 which is only schematically shown in FIG. 1 consists of a finger-shaped yarn guide 13 as shown, for example, in FIG. The finger-shaped thread guide 13 is loaded by an electric motor type driving device and applies a traverse motion between the end faces of the traverse bobbin 5 to the thread 16 wound around the traverse bobbin 5. The yarn guide driving device 14 is connected to the work site calculator 28 via the control lead wire 15.

  As shown in FIG. 2, the yarn laying arm 18 of the finger-shaped yarn guide 13 has a total length L between the bottom of the yarn laying slit 29 and the pivot shaft 30 of the yarn laying arm 18. . The yarn laying arm 18 fixed to the motor shaft of the yarn guide driving device 14 so as not to be relatively rotatable has a sliding element 23 at a distance of 1/3 L from the yarn laying slit 29. The yarn laying arm 18 is supported by the vibration attenuator 20 through the sliding element 23 during the yarn traverse. The vibration damper 20 and the sliding element 23, which are constructed in the form of a circular ring, are preferably made from polytetrafluoroethylene, a material known under the trade name Teflon, which is very slippery. As shown in FIG. 2, the vibration attenuator 20 is detachably or non-removably fixed to a blanket 22 of the motor casing 21 of the yarn guide driving device 13 and the yarn laying arm 18 is moved in the traveling direction R of the yarn 16. It is arranged downstream. That is, the yarn 16 wound around the traverse bobbin 5 reaches the yarn laying slit 29 of the yarn laying arm 18 through the yarn guide contour 31, and at that time, the yarn traverses between the two reversal regions. Given. At this time, the bending stress generated in the yarn laying arm 18 due to the friction of the yarn 16 traveling in the yarn laying slit 29 of the yarn laying arm 18 is sufficiently absorbed by the vibration attenuator 20. That is, the vibration attenuator 20 according to the present invention prevents the generation of harmful vibrations.

Schematic of the work site | part of the textile machine which manufactures a twill roll bobbin. The perspective view of the electric motor type drive device of the finger type thread guide in which the thread laying arm is supported by the vibration attenuator according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automatic traversing machine 2 Work part 3 Spinning cup 5 Traverse winding bobbin 6 Bobbin and winding tube conveyance system 7 Traverse winding bobbin conveyance device 8 Bobbin frame 9 Driving roller 10 Yarn traversing device 11 Conveying tray 13 Finger type yarn guide 14 Driving device DESCRIPTION OF SYMBOLS 15 Control lead wire 16 Thread 18 Thread laying arm 20 Vibration attenuator 21 Motor casing 22 Bracket 23 Sliding element 24 Cup supply section 25 Storage section 26 Horizontal conveyance section 27 Winding pipe return section 28 Work site calculator 29 Thread laying slit 30 Rotating shaft 31 Thread guide contour 33 Electric motor 35 Control lead

Claims (8)

A yarn traversing device for a winding device of a textile machine for producing a traverse bobbin, comprising a yarn guide for feeding in a traverse motion onto a rotationally driven winding bobbin, the yarn guide comprising In the type configured as a finger thread guide (13) which is supported so as to be movable around a pivot axis and which can be loaded by an electric motor type driving device,
For a winding device of a textile machine for manufacturing a traverse bobbin, wherein the finger yarn guide (13) is supported by a stationary vibration attenuator (20) by its yarn laying arm (18) Yarn traverse device.   The yarn traversing device according to claim 1, wherein the vibration attenuator (20) is arranged downstream of the yarn laying arm (18) of the finger yarn guide (13) in the yarn traveling direction (F).   The vibration attenuator (20) is arranged so that the free end of the yarn laying arm (18) is shortened to approximately 1/3 of the total length (L) of the yarn laying arm (18). The yarn traverse apparatus according to claim 1.   4. The yarn traversing device according to claim 1, wherein the vibration attenuator (20) is configured as a circular ring segment.   The yarn according to claim 1, wherein the vibration attenuator (20) is fixed to the front side (19) of a motor casing (21) of an electric motor type drive (14) of the finger-shaped yarn guide (13). Traverse device.   The yarn traversing device according to claim 5, wherein the vibration attenuator (20) is detachably disposed on the bracket (22) of the motor casing (21).   The yarn traversing device according to claim 1, wherein the vibration attenuator (20) is made of a material which is resistant and has good sliding properties, for example polytetrafluoroethylene.   2. The yarn traversing device according to claim 1, wherein the yarn laying arm (18) of the finger-shaped yarn guide (13) has a sliding element (23) cooperating with the vibration damper (20).

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