JP2018020907A - Yarn traversing device equipped with electric motor-type driving device and finger yarn guide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn traversing device capable of detecting the absence of a yarn in a yarn guide fork immediately and regardless of the position of a finger yarn guide.SOLUTION: A finger yarn guide 13 has a yarn guide fork 44, and a yarn traversing device is connected to a work unit controller. According to the present invention, a light emitter 46 and a light detector 47 are arranged in the region of the yarn traversing device, and the finger yarn guide 13 has at least one light guide 42. One end part of at least one light guide 42 communicates into the yarn guide fork, a second end part of at least one light guide 42 is arranged so as to be functionally connected to the light emitter 46 and/or the light detector 47, and the light emitter 46 and/or the light detector 47 is connected to the work unit controller.SELECTED DRAWING: Figure 3a

Description

  The present invention relates to a yarn traversing device and a textile machine for manufacturing a winding package comprising such a yarn traversing device.

  Textile machines for producing winding packages, such as winders or rotor spinning machines, have been known for a long time and are used in large numbers in the textile industry. Each such textile machine has a number of work units of the same type. These work units are arranged side by side in the machine longitudinal direction.

  In a winding machine, the individual working units often have, for example, sensor devices in addition to various yarn handling devices or yarn processing devices. With these sensor devices, the running yarn is scanned during the rewinding process or the prescribed running of the yarn is monitored. These sensor devices are usually connected to a control unit specific to the work unit, which is connected to the central control unit of the textile machine. Such a sensor device for monitoring the running yarn or for monitoring the prescribed running of the yarn is, for example, an electronic yarn clearer, a yarn tension sensor or a traversing monitoring device.

  During the winding operation, for example, it may occur that the yarn jumps out of the yarn guide fork of the finger yarn guide and is no longer wound on the winding package as prescribed. Further, it may occur that the yarn is not slid into the yarn guide foam when inserted, but is placed on the finger yarn guide next to the yarn. In addition, thread breakage may occur, for example, in the yarn traversing region, so that the yarn to be wound is no longer located in the finger yarn guide. These require that the winding process be stopped as quickly as possible to avoid quality loss of the winding package.

  European Patent Application No. 2479130 (EP2479130A2) discloses an optical sensor in the traversing region of a yarn. These optical sensors detect the alternating presence and absence of yarn in the sensor. These sensors work primarily to detect errors in traversing. However, such sensors are also responsive to yarn breaks and other yarn interruptions. Such a sensor may be arranged in the region of the turning point of the traverse or the central region. According to EP-A-2479130 (EP2479130A2), transmissive sensors can be used. The transmissive sensor requires a U-shaped arrangement, whereby the light source unit and the light receiving unit that receives light are opposed to each other. Alternatively, a reflective sensor is proposed. In other words, the light source unit and the light receiving unit are arranged side by side, and the opposing reflector having the surface that diffuses and radiates partially reflects the light back to the light receiving unit.

  A yarn traversing device with a finger yarn guide is described in EP 2537787 (EP2537787B1). The finger thread guide has a base which tapers towards its free end, while having a finger-shaped thread guide fork for receiving and guiding the thread to be wound. The wide end has mounting and locking elements. Through this mounting and locking element, the finger thread guide can be connected to the motor shaft of an electric motor drive. With the aid of the control, the finger yarn guide can be driven as specified so that the yarn winding speed can be precisely adjusted, in particular during the winding process in which the yarn is traversed between the end faces of the winding package. is there.

  Accordingly, a first aspect of the present invention relates to a yarn traversing device having an electric motor type driving device and a finger yarn guide for winding the yarn wound on the surface of the winding package while traversing. In this case, the finger yarn guide has a yarn guide fork, and the yarn traversing device is connected to the work unit control device.

  A light emitter and a light detector are arranged in the region of the yarn traversing device, the finger yarn guide has at least one light guide, and one of the at least one light guide, ie the first end, is A light guide and / or a light detector, the second end of the light guide being in communication with the light emitter and / or the light detector. Is connected to the work unit controller.

  This makes it possible to reliably and directly detect whether the yarn is in the yarn guide fork of the finger yarn guide regardless of the position of the finger yarn guide.

  In order to supply light into the light guide, a light emitter is required. During the use of a single light guide, light is supplied into the light guide and is reflected if a yarn is present in the yarn guide fork. This reflection is detected by a photodetector. If no yarn is present in the yarn guide fork, light exits the light guide and the photodetector detects that there is no reflection.

  When two or more light guides are used, the light is incident on one or more light guides by a light emitter. When no yarn is present in the yarn guide fork, the emitted light is captured by one or more light guides and transmitted to the photodetector. If the yarn is present, the photodetector receives the missing light signal.

  In this case, the light emitter and the light detector may be formed as two separate components or as a combined integral component. Both the light emitter and the light detector must be in contact with or at least in the vicinity of the second end of the at least one light guide. Thereby, a stable working connection is achieved. Furthermore, at least the light detector must be connected to the work unit controller so that a received signal or reflection or lack of light can be transmitted to the work unit controller. In response to this signal, the work unit controller initiates the necessary action in the absence of the yarn in the yarn guide fork, thereby stopping the winding package and / or inserting a new yarn or The insertion can be performed again.

  In this case, with the arrangement according to the invention, it is not only possible to detect yarns that are no longer located in the yarn guide fork on the basis of yarn breakage, but incorrectly inserted yarns or uninserted yarns or windings. Yarn that has jumped out of the yarn guide fork during the process can also be detected.

  Unlike the prior art, the absence of yarn in the yarn guide fork can be detected immediately and independently of the position of the finger yarn guide.

  A known traversing monitoring device arranged stationary in a traversing triangle only detects, for example, a thread insertion error or the absence of a thread when the finger thread guide passes through the location where the sensor is positioned. This is only done after the finger thread guide has performed a complete traverse stroke, in the most inconvenient case.

  In an advantageous embodiment of the invention, the finger thread guide has two light guides. In this case, one end of each light guide leads into the thread guide fork, the second end of one light guide is operatively connected to the light emitter, and the second light guide second end. The end is operatively connected to the photodetector.

  Such a configuration provides the advantage of a larger signal deviation over configurations with one light guide and with reflection sensing. Larger signal deviations generally provide process stability for detecting the absence of yarn within the yarn guide fork.

  Advantageously, the light emitter and / or the light detector are arranged on an electric motor drive of the yarn traversing device.

  Such an arrangement of both components is particularly advantageous. This is because, on the one hand, access to the end of one or more light guides can be simply assured structurally, on the other hand, the pivoting movement of the finger thread guide causes the placement of the light guide or the light emitter and / or Alternatively, the light transmission in the photodetector is not impaired.

  However, within the framework of the invention, it is also possible to provide the light emitter and / or the light detector in a winding unit casing or a guide metal sheet.

  Advantageously, a light emitter and / or a light detector are arranged on the finger thread guide.

  If the light emitter and / or the light detector are mounted directly on the finger thread guide, the light is supplied from the front into the at least one light guide or from the light guide into the light detector in the front. . For this purpose, the end or end surface of the light guide must be arranged slightly bent and out of the finger thread guide, so that this end / end surface is connected to the light emitter and / Or located in the immediate vicinity of or in contact with the photodetector.

  In an alternative embodiment, the light emitter and / or the light detector are arranged below the finger thread guide.

  In such an arrangement, light from the light emitter is input into the light guide from below through the radial surface of the light guide, or light from the light guide is input into the photodetector.

  Another aspect of the present invention relates to a textile machine for manufacturing a winding package, comprising a plurality of working units. The work unit has an electric motor type driving device and a finger yarn guide for winding the yarn running on the surface of the winding package while traversing. The finger yarn guide has a yarn guide fork, and the yarn traverse device is connected to the winding unit control device.

  In a textile machine for producing a winding package, it is proposed that the textile machine has a yarn traversing device according to the embodiment described above.

  By quickly detecting the absence of yarn in the yarn guide fork of the finger yarn guide or the yarn not being inserted into the yarn guide fork of the finger yarn guide as prescribed, the required subsequent action can be started immediately. Traversing without a thread is no longer confirmed after the end of the traversing stroke in the worst case, but immediately after occurrence. This overall increases the efficiency of the textile machine.

  The rapid detection of yarn insertion errors is particularly advantageous. In the past, for example, after the yarn breakage, the upper yarn or the lower yarn is captured, inserted into the yarn splicing device, spliced together, and the winding process is started. However, if a so-called thread insertion error exists, that is, if the thread is not located in the thread guide fork, the splicing is still performed as defined and the winding process is started. The absence of yarn was only detected after the traverse yarn monitoring device positioned at one location of the traverse triangle was passed. Accordingly, a so-called yarn splicing process has been started anew.

  In a textile machine producing a winding package with a yarn traversing device according to the above-described aspect comprising at least one light guide, the absence of yarn is detected quickly before the winding process is newly started. The

  Similarly, so-called popping yarns, i.e. yarns jumping out of the yarn guide fork during the winding process, can be detected quickly. Conventionally, the absence of yarn was detected immediately after the finger yarn guide passed through the stationary sensor, even in the best case. If the yarn is placed inadequately, another sensor device or yarn monitoring device will not be able to detect a yarn break, so in the worst case it may take some time until such a jumping yarn is detected. It takes.

  Another aspect of the present invention relates to a method for detecting a yarn in a yarn traversing device in a textile machine for manufacturing a winding package, comprising a plurality of working units. In this case, the yarn traversing device has an electric motor type driving device and a finger yarn guide for winding the yarn running on the surface of the winding package while traversing the finger yarn guide. The yarn traverse device has a yarn guide fork, and the yarn traverse device is connected to the work unit control device.

  In a first step, a method is proposed in which light is supplied from a light emitter into at least one light guide that leads into a thread guide fork. In the second step, the presence or absence of light is transmitted to the photodetector by a light guide. In the third step, the presence or absence of light is transmitted to the work unit controller by means of a light detector, and then in a fourth step, the work unit is controlled as necessary according to the presence or absence of light.

  Such a method format allows a quick and direct response to the absence of yarn in the finger yarn guide. So-called thread insertion errors when restarting the winding process as well as flying yarns during the winding process can be detected immediately.

  When a finger yarn guide with a single light guide is used, the light is reflected by the yarn present in the yarn guide fork and this reflection is transmitted by the light guide to the photodetector. In the finger yarn guide having two or more light guides, light is supplied into at least one light guide, and when the yarn is absent, the advanced light is captured by the second light guide and transmitted to the photodetector. The yarn present will prevent transmission of light from one light guide to the other when at least two light guides are provided. The light detector communicates the presence or absence of light to the work unit controller, which, in the absence of yarn, prevents winding that is not as specified in the winding package. Begin interrupting the winding process. The rapid detection of error conditions allows for rapid intervention and correction, so that the efficiency of the textile machine that manufactures the winding package is optimized overall.

  Additional features and advantages of the invention will be apparent from the following description of advantageous embodiments of the invention, from the drawings and drawings showing the details important to the invention, and from the claims.

  BRIEF DESCRIPTION OF THE DRAWINGS Advantageous embodiments of the invention are described in detail below with reference to the accompanying drawings.

It is a side view which shows the work unit of the textile machine which manufactures a winding package. It is the perspective view which looked at the yarn traverse device provided with the finger yarn guide from the front. FIG. 3 is a schematic view of a finger yarn guide with one light guide. FIG. 3 is a schematic side view of an alternative finger thread guide with one light guide. FIG. 3 is a schematic view of a finger yarn guide with two light guides. FIG. 6 is a schematic side view of an alternative finger thread guide with two light guides.

  FIG. 1 schematically shows a working unit 2 of a textile machine for manufacturing a winding package, in this case a winding machine 1, in a side view. As is well known, such a winder 1 has a number of work units 2 each having the same structure between end portions (not shown).

  In these working units 2, which are likewise known and therefore not described in detail, the spinning cup 3 produced by the ring spinning machine is wound back into a large-capacity winding package 5. After completion of the winding package 5, it is delivered by a service unit (not shown), for example a traverse package changer, onto a winding package transport device 7 in the machine longitudinal direction and then placed on the side of the machine. And so on.

  Such a winder 1 more often has a distribution device in the form of a bobbin and a wound tube transport system 6. In the bobbin and winding tube transfer system 6, the spinning cup 3 or the empty tube is circulated on the transfer tray 11. Of the bobbin and winding tube transfer system 6, FIG. 1 simply shows a cup supply section 24, a reversibly driveable supply section 25, one of the transverse transfer sections 26 that guides toward the winding unit 2, A winding return section 27 is shown.

  The individual winding units 2 further have different devices. These devices guarantee the normal operation of such work units. One of these devices is, for example, a winding device indicated by reference numeral 4. The winding device has a package frame 8 that is pivotally supported around a turning axis 12. In this case, the surface of the winding package 5 is placed on the package driving roller 9 during the winding process, and is entrained by the package driving roller 9 by frictional connection.

  However, in an alternative embodiment, the winding package 5 can also be driven by a drive device that can control the number of revolutions, preferably a direct current motor that can be electronically communicated. The drive device is arranged directly on the package frame 8 or integrated in the package frame 8.

  The yarn traversing device 10 performs traversing of the yarn 16 wound on the winding package 5 during the winding process. Such a yarn traversing device 10, which is only suggested schematically in FIG. 1, has a finger yarn guide 13. As can be seen from FIG. 2, the finger yarn guide 13 is driven by an electric motor type driving device 14 to traverse the yarn 16 between both end faces of the winding package 5.

  As further illustrated in FIG. 2, the drive device 14 has a motor shaft 33. On the motor shaft 33, a finger guide 13 formed in a finger shape is disposed so as not to be relatively rotatable. The drive device 14 itself is connected to the work unit control device 28 via the control line 15.

  The work unit 2 further includes a lower thread sensor 40, a thread clearer 22, a thread cutting device 23 disposed in the area of the thread clearer 22, and a thread tension sensor 20. These are connected to a control unit 28 specific to the work unit via signals or control lines 41, 29, 30, 21. Each work unit 2 has a suction nozzle 35, a so-called gripper pipe 37, and a pneumatic yarn splicing device 36 as usual.

  FIG. 2 is a perspective view of the yarn traversing device 10 arranged in one working unit 2 of the textile machine for manufacturing the winding package 5 as seen from the front. As suggested, such a working unit 2 has a winding unit casing 31 with an input device 32. The winding unit casing 31 accommodates, among other things, a work unit control device 28. A winding device 4 is further attached to the winding unit casing 31. The winding device 4 mainly includes a package frame 8 for holding the winding package tube 18, a package driving roller 9, and a yarn traversing device for traversing the yarn 16 that runs on the winding package 5. 10.

  In this case, the yarn traversing device 10 has a finger yarn guide 13. The reversible drive device 14 of the finger thread guide 13 is connected to the work unit control device 28 via the control line 15 as already described above. The finger yarn guide 13 can be driven and controlled as specified via the work unit controller 28. In the plan view, the finger yarn guide 13 is arranged behind the guide metal thin plate 17. The yarn 16 is guided in front of the guide metal sheet 17 during the winding process.

  FIGS. 3 a and 3 b show the finger thread guide 13 with one light guide 42. The base body 43 has, at its free end, a finger-like thread guide fork 44 for receiving and guiding the thread 16 to be wound. A mounting and locking element 45 is located at the wide end. The finger thread guide 13 is connected to the motor shaft 33 of the electric motor type driving device 14 via the mounting and locking element 45.

  In FIG. 3 a, the light emitter 46 and the light detector 47 are arranged below the finger thread guide 13. The light guide 42 extends from the bottom of the yarn guide fork 44 through the base body 43 to the immediate vicinity of the light emitter 46 and the light detector 47.

  Light is input into the light guide 42 from below by the light emitter 46. When the thread 16 is disposed in the finger thread guide 13, the light is reflected. When the thread 16 is not located in the thread guide fork 44, the light exits the light guide 42. The absence of reflection is now detected by the photodetector 47 and transmitted to the work unit controller 28. The work unit controller 28 therefore stops both the finger thread guide 13 and the winding package 5.

  FIG. 3 b shows an alternative arrangement of the light emitter 46 and the light detector 47. In this embodiment, the light emitter 46 and the light detector 47 are disposed on the finger yarn guide 13. In this case, one end of the light guide 42 must be bent and protrude from the finger thread guide 13, so that the light guide 42 also has the light emitter 46 and the light detector 47 at the end face in this arrangement. Located in the vicinity, this creates a working connection.

  4a and 4b show an embodiment in which two light guides 42 are present. Both light guides 42 extend from the bottom of the thread guide fork 44 to the region of the mounting and locking elements 45, in which case one or the first light guide 42 is operatively connected to the light emitter 46. The second light guide 42 is operatively connected to the photodetector 47. The light emitter 46 inputs light into the light guide 42. When the yarn 16 is not located in the yarn guide fork 44, the light is received and transmitted by the second light guide 42, and this light is detected by the photodetector 47. This signal is transmitted to the work unit controller 28, which therefore stops both the finger thread guide 13 and the winding package.

  In FIG. 4 a, the light emitter 46 and the light detector 47 are arranged below the finger thread guide 13. Light is supplied into the light guide 42 from below.

  FIG. 4 b shows an alternative arrangement of the light emitter 46 and the light detector 47 on the finger thread guide 13. As already described with respect to FIG. 3 b, the light guide 42 is bent in this embodiment and protrudes from the finger thread guide 13 in the immediate vicinity of the light emitter 46 and the light detector 47.

  In all embodiments, it is ensured that the absence of the thread 16 is detected immediately and independently of the swing position of the finger thread guide 13 and corresponding measures are initiated.

Claims (7)

Yarn traversing device (14) having an electric motor type driving device (14) and a finger yarn guide (13) for winding the yarn (16) running on the surface of the winding package (5) while traversing. 10), wherein the finger yarn guide (13) has a yarn guide fork (44), and the yarn traversing device (10) is connected to a work unit control device (28). In the yarn traverse device (10),
A light emitter (46) and a photodetector (47) are arranged in the region of the yarn traversing device (10),
The finger thread guide (13) has at least one light guide (42);
One end of the at least one light guide (42) leads into the thread guide fork (44);
A second end of the at least one light guide (42) is arranged to be in operative connection with the light emitter (46) and / or the light detector (47);
The yarn traversing device (10), wherein the light emitter (46) and / or the light detector (47) are connected to the work unit controller (28).   The finger thread guide (13) has two light guides (42), each one end of the light guide (42) leads to the thread guide fork (44), A second end of the light guide (42) is operatively connected to the light emitter (46), and a second end of the second light guide is operatively connected to the photodetector (47). The yarn traversing device (10) according to claim 1, characterized in that   The light emitter (46) and / or the light detector (47) are arranged on the electric motor drive (14) of the yarn traversing device (10), Item 1. A yarn traverse device (10) according to item 1.   The yarn traversing device (10) according to claim 3, characterized in that the light emitter (46) and / or the light detector (47) are arranged on the finger yarn guide (13).   The yarn traversing device (10) according to claim 3, characterized in that the light emitter (46) and / or the light detector (47) are arranged below the finger yarn guide (13). . A textile machine for manufacturing a take-up package (5) having a plurality of work units (2), wherein the work unit (2) comprises an electric motor type drive device (14) and a take-up package (5). ) And a finger yarn guide (13) for winding the yarn (16) running on the surface while traversing the finger yarn guide (13). The finger yarn guide (13) includes a yarn guide fork (44). In a textile machine having a yarn traversing device (10) connected to a work unit control device (28),
A winding machine (5) characterized in that a textile machine for manufacturing the winding package (5) comprises the yarn traversing device (10) according to any one of claims 1 to 5. ) Textile machine manufacturing. A method for detecting a yarn in a yarn traversing device (10) in a textile machine for manufacturing a winding package (5), comprising a plurality of work units (2), wherein the yarn traversing device (10) An electric motor type driving device (14) and a finger yarn guide (13) for winding the yarn (16) running on the surface of the winding package (5) while traversing, In the method, the finger yarn guide (13) has a yarn guide fork (44), and the yarn traversing device (10) is connected to a work unit controller (28).
In a first step, light is supplied from a light emitter (46) into at least one light guide (42) leading into the yarn guide fork (44);
In the second step, the presence or absence of light is communicated by the light guide (42) to the photodetector (47);
In a third step, the presence or absence of light is communicated by the photodetector (47) to the work unit controller (28);
In the fourth step, the work unit (2) is controlled as necessary according to the presence or absence of light,
A method for detecting yarn in a yarn traversing device (10) in a textile machine for manufacturing a winding package (5), characterized in that

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