EP0276470B1 - Apparatus for controlling the yarn remainder on bobbins - Google Patents

Apparatus for controlling the yarn remainder on bobbins Download PDF

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Publication number
EP0276470B1
EP0276470B1 EP87119073A EP87119073A EP0276470B1 EP 0276470 B1 EP0276470 B1 EP 0276470B1 EP 87119073 A EP87119073 A EP 87119073A EP 87119073 A EP87119073 A EP 87119073A EP 0276470 B1 EP0276470 B1 EP 0276470B1
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EP
European Patent Office
Prior art keywords
arm
bobbin
yarn
switch
probe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87119073A
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German (de)
French (fr)
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EP0276470A1 (en
Inventor
Siegfried Nürk
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Sipra Patententwicklungs und Beteiligungs GmbH
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Sipra Patententwicklungs und Beteiligungs GmbH
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Publication of EP0276470A1 publication Critical patent/EP0276470A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • B65H63/086—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle responsive to completion of unwinding of a package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a device for monitoring the yarn supply on a yarn spool, from which the yarn is drawn off overhead, with a button resiliently resting against yarn turns on the side facing away from the yarn take-off side.
  • Yarn processing textile machines must be switched off when the yarn supply of a bobbin is exhausted and the beginning of this bobbin is not already connected to the end of the yarn in a new, full bobbin.
  • Coil carriers with work coils and reserve coils are bulky and cannot be used everywhere.
  • the transfer to the reserve spool is an additional source of interference in the case of poorly wound spools.
  • the bobbin are provided in their end region facing away from the yarn take-off side of the yarn bobbin with at least one opening, through which the button of a switching device rests against the innermost yarn winding layer and carries out a switching movement as soon as the yarn of the last yarn winding layer has been pulled off at the touch point .
  • These devices have the disadvantage that they require specially designed yarn bobbins with openings for the buttons and that the yarn bobbin and the switching device must always fit together.
  • a monitoring device in which a pushbutton which is immersed in an edge slot of a tubular yarn bobbin and is pivotably mounted outside the bobbin bears against a smaller initial bobbin set apart from the main bobbin and pretensioned on the side facing away from the yarn take-off side Side is applied to the winding body.
  • the invention has for its object to provide a monitoring device of the type mentioned in such a way that it is effective regardless of the different dimensions of the numerous different types of bobbins and the position of the bobbins on these bobbins and the nature of the yarn stored on the bobbin and the Surface quality of the bobbin also have no influence.
  • the object is achieved with a monitoring device of the type mentioned in the present invention in that the button rests against the end face of the yarn package and additionally on the winding surface of the package spool and is movable along the winding surface.
  • the push button rests on a face of the yarn wrap, where it either bears against the last yarn winding layer or is already released when the penultimate or third-last yarn winding layer is broken down and a switching movement can run along the thread winding surface of the thread spool.
  • the bobbin does not have to have a window for the button or a special surface condition.
  • the button can be articulated on a spring-loaded switch arm that can be locked in a starting position and can also be supported on a support arm that can be placed against the winding surface of the bobbin at the end of the bobbin.
  • the support arm adapts to the thickness or a center-to-center distance of a thread spool when a thread spool is attached and thereby moves the push-button as well.
  • the device can thus be used on bobbins with differently sized bobbins and with different thicknesses of the generally tubular bobbins, whereby it is ensured that the button always comes to rest against the end face of the bobbin.
  • the switching arm can advantageously be designed as a swivel arm, at the free end of which the button, which is also designed as a swivel arm and ends in a free probe tip, is articulated, the probe tip of which rests on the pivotable support arm in the locking position of the switch arm.
  • the push button can be assigned a relatively long switching path in a space-saving arrangement before an electrical switch influenced by the switching arm responds.
  • the monitoring device designed according to the invention also takes into account the fact that commercially available thread spools are not only present in different dimensions of their thread spools, but also have different distances from the end of the thread spool from the end of the thread spool, which is expediently used in a device designed according to the invention to release the locked button .
  • the switching arm can, according to the invention, engage in its initial position with a spring-loaded locking lever, which can have a release arm which can be acted upon by the end of the spool body on the plug-in side.
  • the switching arm in its locked starting position, the support point of the support arm and the release arm of the locking lever can be seen at the same height as a thread spool carrier in the plugging direction of a yarn spool.
  • the monitoring device is only activated when the end of the spool body is pressed against the release arm of the locking lever, the support arm lying at the same level sliding onto the outer surface of the spool body before after a sufficient Adjustment of the release arm of the locking lever, the switching arm is unlocked with the button and the button comes to bear against the end of the thread winding unit. If the bobbin is removed again, the device automatically returns to its locked position and starting position.
  • the switching arm can advantageously be equipped with a permanent magnet which is in its maximum pivoting position in the region of an electrical, magnetically influenceable switching element, for example a reed contact accommodated in the housing or a Hall generator.
  • the device can be easily attached to any conventional spool holder, for which purpose the device housing, which provides the device parts with extensive dust protection, can have a receiving opening or a clamping attachment or the like for fastening, in particular for fastening to a plug-on mandrel.
  • the figures each show a bobbin holding rod 10 of a creel for a knitting or knitting machine, which in the present case is shown in a horizontal position, but which can also have a conventional inclined position or can be a vertical bobbin mandrel.
  • the cuboid housing 11 of the monitoring device is plugged onto the coil holding rod 10 and fastened by means of a clamping screw 13.
  • the housing 11 is provided with a suitable through-channel or an attached holding eye.
  • a wall of the housing 11 of the monitoring device 12 has been removed in order to make its inner parts visible.
  • a switching arm 16 which can be pivoted about an axis 14 and is biased by means of a tension spring 15 and which carries a rod-shaped permanent magnet 17 on its rear side in its central region.
  • a locking lever 19 which can be pivoted about an axis 18 and which has a release arm 19.1 located in the region of a housing opening 20 engages at the front end of the switching arm 16.
  • a button 22 designed as a pivot lever is mounted at a bearing point 21.
  • the button 22 is parallel to a support arm 23 located behind it in the drawing, and the button tip 22.1 is supported in the area of the support point 23.1 of this support arm 23 in the locking position of the monitoring device shown in FIG. 1.
  • the support arm 23 is pivotally mounted about an axis 24 and has an elongated counter arm 23.2 which, according to FIG. 1, carries a stop 25 for the switching arm 16.
  • the switching arm 16, the locking lever 19, the button 22 and the support arm 23 are therefore all in parallel planes, in the top level the switching arm 16 and the locking lever 19, in the next level the button 22 and in the third level the support arm 23, which is under the pretension of a tension spring 26 acting on its counter arm 23.2.
  • the tension spring 26 gives the support arm 23 a torque which is greater than the opposite torque exerted by the spring 15 on the switching arm 16.
  • the locking lever 19 is under the action of a compression spring 27.
  • the button 22 is under the pretension of a compression spring 31 anchored on the switching arm 16. Its pivoting range is limited by a stop lug 22.2 (FIG. 1).
  • the switching arm 16 interacts with a reed contact switch 28 which is arranged within the housing 11 and is connected via lines 29 to a lateral electrical connection socket 30.
  • Fig. 1 shows the monitoring device 12 in its locked position, in which the switching arm 16 at its front end directly or via the button 22 coupled to it by the locking lever 19 and at its rear end by the stop 25 of the counter arm 23.2 of the support arm 23 is held in an initial position in which the button 22 is retracted into the opening 20 of the housing 11 and is supported at the support point 23.1 with the button tip 22.1 on the support arm 23.
  • the release arm 19.1 of the locking lever 19 and the support point 23.1 of the support arm 23 are located in the opening 20 of the housing 11 at the same height.
  • the monitoring device is ineffective. It can remain in this position even when the bobbin is attached but the bobbin is not pressed on.
  • Fig. 1 shows the monitoring device 12 in its locked position, in which the switching arm 16 at its front end directly or via the button 22 coupled to it by the locking lever 19 and at its rear end by the stop 25 of the counter arm 23.2 of the support arm 23 is held in an initial position in which the button 22 is retracted into the opening 20 of
  • a dashed lines provided with a yarn package 33 cylindrical yarn bobbin 34 is drawn, which is pushed onto the bobbin holding rod 10 as a reserve bobbin only to such an extent that the bobbin edge 34.1 bears against the head of the support arm 23 forming an inclined sliding surface.
  • the monitoring device is only activated when the end 34.1 of the bobbin 34 is pressed against the head of the support arm 23 and further against the release arm 19.1 of the locking lever 19, as can be seen from FIG. 2.
  • Fig. 2 shows a conical yarn bobbin 32 pushed onto the bobbin holding rod 10 with a conical yarn bobbin 34 ', the foot edge 34.1' of which is pushed into the housing window 20 until the support lever 23 is pivoted against the force of the spring 26 by sliding its head clockwise and its support point 23.1 rests on the free end area of its outer winding surface 35.
  • the locking lever 19 is also pivoted clockwise by the stop of the bobbin edge 34.1 ⁇ against its release arm 19.1 and thus the switching arm 16 is released.
  • the switch arm 16 By releasing the switch arm 16 under the action of the tension spring 15 swiveled clockwise until the button 22 coupled to it rests with its button tip 22.1 against the end face 33a of the yarn package 33 of the yarn package 32.
  • the probe tip 22.1 is held under the action of the compression spring 31 against the winding surface 35 of the coil former 34 ⁇ .
  • the yarn 36 forming the yarn package 33 is drawn off from the fixed yarn package 32 over the head of the yarn package, ie over the other end face 33b of the yarn package 33.
  • both the locking lever 19 and the support arm 23 are released.
  • the counter arm 23.2 of the support arm 23 is pivoted back in a counterclockwise direction by the tension spring 26 and takes the switching lever 16 with its stop 25 against the force of the tension spring 15 until the locking position shown in FIG. 1 is reached, in which the front end of the switching arm 16 or the button 22 articulated there snap into place on the released locking lever 19.
  • the control circuit to which the switch 28 is connected can have any suitable structure.
  • the button tip 22.1 of the button 22 can protrude more or less from the winding surface 35 of the bobbin, so that it bears against the second to last or third to last yarn winding layer and is already released when these yarn winding layers are broken down.
  • the device housing 11 may be provided with an indicator lamp, not shown. However, a common display panel can also be provided for all yarn package monitoring points in a textile machine.

Description

Die Erfindung betrifft eine Vorrichtung zur Überwachung des Garnvorrates auf einer Garnspule, von welcher das Garn über Kopf abgezogen wird, mit einem auf der von der Garnabzugsseite abgewandten Seite gegen Garnwindungen federnd anliegenden Taster.The invention relates to a device for monitoring the yarn supply on a yarn spool, from which the yarn is drawn off overhead, with a button resiliently resting against yarn turns on the side facing away from the yarn take-off side.

Garnverarbeitende Textilmaschinen müssen abgeschaltet werden, wenn der Garnvorrat einer Garnspule erschöpft ist und der Garnanfang dieser Spule nicht bereits mit dem Garnende einer neuen vollen Garnspule verbunden ist. Spulenträger mit Arbeitsspulen und Reservespulen sind sperrig und können nicht überall eingesetzt werden. Außerdem stellt der Abzugsübergang auf die Reservespule bei schlecht gewickelten Spulen eine zusätzliche Störquelle dar.Yarn processing textile machines must be switched off when the yarn supply of a bobbin is exhausted and the beginning of this bobbin is not already connected to the end of the yarn in a new, full bobbin. Coil carriers with work coils and reserve coils are bulky and cannot be used everywhere. In addition, the transfer to the reserve spool is an additional source of interference in the case of poorly wound spools.

Zu warten, bis das Garn ganz von der Garnspule abgelaufen ist, bevor die Maschine durch einen sogenannten Fadenwächter abgestellt wird, hat sich als nachteilig erwiesen, weil dann das Anknüpfen des Garnendes einer neuen Garnspule an den abgelaufenen Garnanfang der alten Spule schwieriger und zeitraubender wird. Bei schlecht gewickelten Spulen besteht die Gefahr, daß in der letzten Wickellage die Restwindungen beim Fadenabzug zusammen abrutschen und einen Fadenknäuel bilden. Man hat daher bereits Vorrichtungen entwickelt, mit welchen der Beginn des Abziehens der letzten Garnwickelschicht von einem Garnspulenkörper festgestellt werden kann. Bei diesen bekannten Einrichtungen sind die Garnspulenkörper in ihrem der Garnabzugsseite der Garnspule abgewandten Endbereich mit mindestens einer Öffnung versehen, durch welche hindurch der Taster einer Schalteinrichtung gegen die innerste Garnwickelschicht anliegt und eine Schaltbewegung ausführt, sobald an der Taststelle das Garn der letzten Garnwickelschicht abgezogen worden ist. Diese Einrichtungen haben den Nachteil, daß sie besonders gestaltete, also mit Öffnungen für die Taster versehene Garnspulenkörper erforderlich machen und die Garnspulenkörper und die Schalteinrichtung immer zusammenpassen müssen. Dies gilt auch für eine Überwachungsvorrichtung nach der FR-A 2 530 603, bei welcher ein in einen Randschlitz eines rohrförmigen Garnspulenkörpers eintauchender und außerhalb des Garnspulenkörpers verschwenkbar gelagerter Taster gegen einen vom Hauptwickelkörper abgesetzten kleineren Anfangswickelkörper mit Vorspannung anliegt, der auf der von der Garnabzugseite abgewandten Seite auf den Wickelkörper aufgebracht ist.Waiting until the yarn has completely run off the bobbin before the machine is stopped by a so-called thread monitor has proven to be disadvantageous, because then it becomes more difficult and time-consuming to tie the end of a new bobbin to the end of the old bobbin that has expired. In the case of poorly wound bobbins, there is a risk that in the last winding position, the remaining turns when the thread is drawn off will slide together and form a ball of thread. Devices have therefore already been developed with which the beginning of the pulling off of the last yarn winding layer from a bobbin can be determined. In these known devices, the bobbin are provided in their end region facing away from the yarn take-off side of the yarn bobbin with at least one opening, through which the button of a switching device rests against the innermost yarn winding layer and carries out a switching movement as soon as the yarn of the last yarn winding layer has been pulled off at the touch point . These devices have the disadvantage that they require specially designed yarn bobbins with openings for the buttons and that the yarn bobbin and the switching device must always fit together. This also applies to a monitoring device according to FR-A 2 530 603, in which a pushbutton which is immersed in an edge slot of a tubular yarn bobbin and is pivotably mounted outside the bobbin bears against a smaller initial bobbin set apart from the main bobbin and pretensioned on the side facing away from the yarn take-off side Side is applied to the winding body.

Es ist auch bekannt, Garnspulen auf ihrer Außenseite optisch abzutasten und die Wickelfläche des Garnspulenkörpers mit einer reflektierenden Beschichtung zu versehen, so daß sich nach dem Abzug der letzten Garnwickelschicht an der Überwachungsstelle Lichtreflexe ergeben, die als Steuersignale zum Abschalten einer Textilmaschine verwertet werden können. Diese Überwachungsvorrichtung hat ebenfalls den Nachteil, daß sie nur in Verbindung mit speziell präparierten, also mit einer reflektierenden Oberfläche versehenen Garnspulenkörpern eingesetzt werden kann und daß bei glänzenden Garnen durch Lichtreflexe Fehlabschaltungen ausgelöst werden können.It is also known to optically scan yarn bobbins on their outside and to provide the winding surface of the yarn bobbin with a reflective coating, so that after the last yarn winding layer has been pulled off at the monitoring point, light reflections result which can be used as control signals for switching off a textile machine. This monitoring device also has the disadvantage that it can only be used in conjunction with specially prepared yarn bobbins with a reflective surface can be used and that, in the case of shiny yarns, false shutdowns can be triggered by light reflections.

Der Erfindung liegt die Aufgabe zugrunde, eine Überwachungsvorrichtung der eingangs genannten Art so auszubilden, daß sie unabhängig von den unterschiedlichen Abmessungen der zahlreichen unterschiedlichen Arten von Garnspulenkörpern und der Lage der Wickelkörper auf diesen Spulenkörpern wirksam ist und die Beschaffenheit des auf der Garnspule gespeicherten Garnes und die Oberflächenbeschaffenheit des Garnspulenkörpers ebenfalls keinen Einfluß haben.The invention has for its object to provide a monitoring device of the type mentioned in such a way that it is effective regardless of the different dimensions of the numerous different types of bobbins and the position of the bobbins on these bobbins and the nature of the yarn stored on the bobbin and the Surface quality of the bobbin also have no influence.

Die gestellte Aufgabe wird mit einer Überwachungsvorrichtung der eingangs genannten Art erfindungsgemäß dadurch gelöst, daß der Taster gegen die Stirnseite des Garnwickels und zusätzlich an der Wickelfläche des Garnspulenkörpers anliegt und auf der Wickelfläche entlang bewegbar ist.The object is achieved with a monitoring device of the type mentioned in the present invention in that the button rests against the end face of the yarn package and additionally on the winding surface of the package spool and is movable along the winding surface.

Bei der erfindungsgemäß ausgebildeten Überwachungsvorrichtung liegt also im Gegensatz zu bisher bekannten einschlägigen Überwachungsvorrichtungen mit mechanischen Garnfühlern der Taster an einer Garnwickelstirnseite an, wobei er wahlweise an der letzten Garnwickelschicht anliegen oder auch bereits beim Abbau der vorletzten oder drittletzten Garnwickelschicht freikommen und eine Schaltbewegung entlang der Garnwickelfläche der Garnspule ausführen kann. Der Garnspulenkörper muß dabei weder ein Fenster für den Taster noch eine besondere Oberflächenbeschaffenheit aufweisen. Mit der Vorrichtung gemäß der Erfindung ist sichergestellt, daß der Taster seine Schaltbewegung immer ausführt, solange noch ein Rest des Garnvorrats auf der Garnspule vorhanden ist, wodurch das Anknüpfen eines neuen Fadens erleichtert und ein Neustart einer Textilmaschine ohne langen Maschinenstillstand möglich ist.In the monitoring device designed in accordance with the invention, in contrast to previously known relevant monitoring devices with mechanical yarn sensors, the push button rests on a face of the yarn wrap, where it either bears against the last yarn winding layer or is already released when the penultimate or third-last yarn winding layer is broken down and a switching movement can run along the thread winding surface of the thread spool. The bobbin does not have to have a window for the button or a special surface condition. With the device according to the invention it is ensured that the button always executes its switching movement as long as there is still a remnant of the yarn supply on the yarn spool, which facilitates the connection of a new thread and a restart of a textile machine is possible without a long machine downtime.

Vorteilhafterweise kann der Taster an einem unter Federvorspannung stehenden, in einer Ausgangslage verriegelbaren Schaltarm angelenkt und außerdem an einem gegen die Wickelfläche des Garnspulenkörpers am Garnspulen-Aufsteckende anlegbaren Auflagearm abstützbar gelagert sein. Der Auflagearm paßt sich beim Aufstecken einer Garnspule an die Stärke oder einen Mittelpunktsabstand einer Garnspule an und bewegt hierbei den Taster mit. Die Vorrichtung kann also an Garnspulen mit unterschiedlich großen Garnspulenkörpern und mit unterschiedlicher Dicke der in der Regel hülsenförmigen Garnspulenkörper eingesetzt werden, wobei sichergestellt ist, daß der Taster immer gegen die Stirnseite des Garnspulenwickels zur Anlage kommt. Der Schaltarm kann vorteilhafterweise als Schwenkarm ausgebildet sein, an dessen freiem Ende der ebenfalls als Schwenkarm ausgebildete und in einer freien Tastspitze endende Taster angelenkt ist, dessen Tastspitze in der Verriegelungsstellung des Schaltarmes an dem verschwenkbaren Auflagearm anliegt.Advantageously, the button can be articulated on a spring-loaded switch arm that can be locked in a starting position and can also be supported on a support arm that can be placed against the winding surface of the bobbin at the end of the bobbin. The support arm adapts to the thickness or a center-to-center distance of a thread spool when a thread spool is attached and thereby moves the push-button as well. The device can thus be used on bobbins with differently sized bobbins and with different thicknesses of the generally tubular bobbins, whereby it is ensured that the button always comes to rest against the end face of the bobbin. The switching arm can advantageously be designed as a swivel arm, at the free end of which the button, which is also designed as a swivel arm and ends in a free probe tip, is articulated, the probe tip of which rests on the pivotable support arm in the locking position of the switch arm.

Bei der Ausgestaltung des Schaltarmes als Schwenkarm läßt sich bei raumsparender Anordnung dem Taster ein relativ langer Schaltweg zuordnen, bevor ein vom Schaltarm beeinflußter elektrischer Schalter anspricht. Damit trägt die erfindungsgemäß ausgebildete Überwachungsvorrichtung auch dem Umstand Rechnung, daß handelsübliche Garnspulen nicht nur in unterschiedlichen Abmessungen ihrer Garnspulenkörper vorliegen, sondern auch unterschiedliche Abstände der Garnwickelstirnseite vom Ende des Garnwickelkörpers, das bei einer erfindungsgemäß ausgebildeten Vorrichtung zweckmäßig zur Freigabe des verriegelten Tasters verwendet wird, aufweisen. Der Schaltarm kann hierbei erfindungsgemäß in seiner Ausgangslage mit einem federbelasteten Riegelhebel in Eingriff stehen, der einen von dem aufsteckseitigen Garnspulenkörperende beaufschlagbaren Freigabearm aufweisen kann.In the configuration of the switching arm as a swivel arm, the push button can be assigned a relatively long switching path in a space-saving arrangement before an electrical switch influenced by the switching arm responds. Thus, the monitoring device designed according to the invention also takes into account the fact that commercially available thread spools are not only present in different dimensions of their thread spools, but also have different distances from the end of the thread spool from the end of the thread spool, which is expediently used in a device designed according to the invention to release the locked button . The switching arm can, according to the invention, engage in its initial position with a spring-loaded locking lever, which can have a release arm which can be acted upon by the end of the spool body on the plug-in side.

Bei einer bevorzugten Ausführungsform der Vorrichtung können der Schaltarm in seiner verriegelten Ausgangsstellung, die Auflagestelle des Auflagearmes und der Freigabearm des Riegelhebels sich in der Aufsteckrichtung einer Garnspule gesehen auf gleicher Höhe gegenüber einem Garnspulenträger befinden. Daraus ergibt sich der Vorteil, daß eine Garnspule auf eine mit einer erfindungsgemäß ausgebildeten Überwachungsvorrichtung versehene Spulenhalterung aufgeschoben oder aufgelegt werden kann, auch ohne daß die Überwachungsvorrichtung aktiviert wird. Die Überwachungsvorrichtung wird erst aktiviert, wenn der Garnspulenkörper mit seinem Ende gegen den Freigabearm des Riegelhebels gedrückt wird, wobei der mit seiner Auflagestelle auf gleicher Höhe liegende Auflagearm auf die Außenfläche des Garnspulenkörpers aufgleitet, bevor nach einer ausreichenden Verstellung des Freigabearmes des Riegelhebels der Schaltarm mit dem Taster entriegelt ist und der Taster gegen die Garnwickelstirnseite zur Anlage gelangt. Wird der Garnspulenkörper wieder abgenommen, geht die Vorrichtung wieder automatisch in ihre Sperrstellung und Ausgangsstellung zurück.In a preferred embodiment of the device, the switching arm in its locked starting position, the support point of the support arm and the release arm of the locking lever can be seen at the same height as a thread spool carrier in the plugging direction of a yarn spool. This results in the advantage that a spool of thread can be pushed or placed on a bobbin holder provided with a monitoring device designed according to the invention, even without the monitoring device being activated. The monitoring device is only activated when the end of the spool body is pressed against the release arm of the locking lever, the support arm lying at the same level sliding onto the outer surface of the spool body before after a sufficient Adjustment of the release arm of the locking lever, the switching arm is unlocked with the button and the button comes to bear against the end of the thread winding unit. If the bobbin is removed again, the device automatically returns to its locked position and starting position.

Alle Teile der Vorrichtung lassen sich mit ihren Lagerstellen in einem weitgehend staubdichten Gehäuse unterbringen. Der Schaltarm kann vorteilhafterweise mit einem Permanentmagneten besetzt sein, der sich in seiner maximalen Verschwenkstellung im Bereich eines elektrischen, magnetisch beeinflußbaren Schaltorganes befindet, beispielsweise eines in dem Gehäuse untergebrachten Reed-Kontaktes oder eines Hall-Generators. Die Vorrichtung läßt sich leicht an jedem ublichen Garnspulenhalter anbringen, wozu das Vorrichtungsgehäuse, das den Vorrichtungsteilen einen weitgehenden Staubschutz erbringt, eine Aufnahmeöffnung oder einen Klemmansatz o. dgl. zur Befestigung, insbesondere zur Befestigung an einem Aufsteckdorn, aufweisen kann.All parts of the device can be accommodated with their bearing points in a largely dust-tight housing. The switching arm can advantageously be equipped with a permanent magnet which is in its maximum pivoting position in the region of an electrical, magnetically influenceable switching element, for example a reed contact accommodated in the housing or a Hall generator. The device can be easily attached to any conventional spool holder, for which purpose the device housing, which provides the device parts with extensive dust protection, can have a receiving opening or a clamping attachment or the like for fastening, in particular for fastening to a plug-on mandrel.

Nachfolgend wird ein Ausführungsbeispiel einer erfindungsgemäß ausgebildeten Überwachungsvorrichtung anhand der beiliegenden Zeichnungen näher erläutert.An exemplary embodiment of a monitoring device designed according to the invention is explained in more detail below with reference to the accompanying drawings.

Im einzelnen zeigen:

Fig. 1.
eine auf einem Spulenhaltestab angeordnete Überwachungsvorrichtung in ihrer verriegelten Ausgangsstellung;
Fig. 2
die Überwachungsvorrichtung in ihrer Betriebsstellung bei aufgesteckter Garnspule;
Fig. 3
die Überwachungsvorrichtung in ihrer Signalgabestellung bei nahezu geleerter Garnspule.
In detail show:
Fig. 1.
a monitoring device arranged on a coil holding rod in its locked starting position;
Fig. 2
the monitoring device in its operating position with the thread spool attached;
Fig. 3
the monitoring device in its signaling position with the thread spool almost empty.

Die Figuren zeigen jeweils einen Spulenhaltestab 10 eines Spulengatters für eine Strick- oder Wirkmaschine, der im vorliegenden Falle in einer Horizontallage dargestellt ist, der aber auch eine übliche Schräglage haben kann oder ein vertikaler Spulenaufsatzdorn sein kann. Auf den Spulenhaltestab 10 ist das quaderförmige Gehäuse 11 der allgemein mit der Bezugsziffer 12 bezeichneten Überwachungsvorrichtung aufgesteckt und mittels einer Klemmschraube 13 befestigt. Das Gehäuse 11 ist hierzu mit einem passenden Durchgangskanal oder einem angesetzten Halteauge versehen. In der Darstellung ist eine Wandung des Gehäuses 11 der Überwachungsvorrichtung 12 entfernt, um ihre Innenteile sichtbar zu machen. Ein wichtiges Vorrichtungsteil ist ein um eine Achse 14 verschwenkbarer, mittels einer Zugfeder 15 vorgespannter Schaltarm 16, der in seinem Mittelbereich auf seiner Rückseite einen stabförmigen Permanentmagneten 17 trägt. Am vorderen Ende des Schaltarmes 16 greift gemäß Fig. 1 ein um eine Achse 18 verschwenkbarer Riegelhebel 19 an, der einen im Bereich einer Gehäuseöffnung 20 befindlichen Freigabearm 19.1 aufweist. Auf der Rückseite des vorderen Endes des Schaltarmes 16 ist an einer Lagerstelle 21 ein als Schwenkhebel ausgebildeter Taster 22 gelagert. Der Taster 22 liegt parallel zu einem in der Zeichnung hinter ihm befindlichen Auflagearm 23, und die Tasterspitze 22.1 ist im Bereich der Auflagestelle 23.1 dieses Auflagearmes 23 in der aus Fig. 1 ersichtlichen Verriegelungsstellung der Überwachungsvorrichtung an ihm abgestützt. Der Auflagearm 23 ist um eine Achse 24 verschwenkbar gelagert und weist einen langgestreckten Gegenarm 23.2 auf, der gemäß Fig. 1 einen Anschlag 25 für den Schaltarm 16 trägt.The figures each show a bobbin holding rod 10 of a creel for a knitting or knitting machine, which in the present case is shown in a horizontal position, but which can also have a conventional inclined position or can be a vertical bobbin mandrel. The cuboid housing 11 of the monitoring device, generally designated by the reference number 12, is plugged onto the coil holding rod 10 and fastened by means of a clamping screw 13. For this purpose, the housing 11 is provided with a suitable through-channel or an attached holding eye. In the illustration, a wall of the housing 11 of the monitoring device 12 has been removed in order to make its inner parts visible. An important part of the device is a switching arm 16 which can be pivoted about an axis 14 and is biased by means of a tension spring 15 and which carries a rod-shaped permanent magnet 17 on its rear side in its central region. According to FIG. 1, a locking lever 19 which can be pivoted about an axis 18 and which has a release arm 19.1 located in the region of a housing opening 20 engages at the front end of the switching arm 16. On the back of the front end of the switching arm 16, a button 22 designed as a pivot lever is mounted at a bearing point 21. The button 22 is parallel to a support arm 23 located behind it in the drawing, and the button tip 22.1 is supported in the area of the support point 23.1 of this support arm 23 in the locking position of the monitoring device shown in FIG. 1. The support arm 23 is pivotally mounted about an axis 24 and has an elongated counter arm 23.2 which, according to FIG. 1, carries a stop 25 for the switching arm 16.

Der Schaltarm 16, der Riegelhebel 19, der Taster 22 und der Auflagearm 23 liegen also alle in parallelen Ebenen, in der obersten Ebene der Schaltarm 16 und der Riegelhebel 19, in der nächsten Ebene der Taster 22 und in der dritten Ebene der Auflagearm 23, der unter der Vorspannung einer an seinem Gegenarm 23.2 angreifenden Zugfeder 26 steht. Die Zugfeder 26 erteilt dem Auflagearm 23 ein Drehmoment, das größer ist als das von der Feder 15 auf den Schaltarm 16 ausgeübte gegensinnige Drehmoment.The switching arm 16, the locking lever 19, the button 22 and the support arm 23 are therefore all in parallel planes, in the top level the switching arm 16 and the locking lever 19, in the next level the button 22 and in the third level the support arm 23, which is under the pretension of a tension spring 26 acting on its counter arm 23.2. The tension spring 26 gives the support arm 23 a torque which is greater than the opposite torque exerted by the spring 15 on the switching arm 16.

Der Riegelhebel 19 steht unter der Einwirkung einer Druckfeder 27. Der Taster 22 steht unter der Vorspannung einer am Schaltarm 16 verankerten Druckfeder 31. Sein Schwenkbereich wird durch eine Anschlagnase 22.2 (Fig. 1) begrenzt. Der Schaltarm 16 wirkt mit einem Reed-Kontakt-Schalter 28 zusammen, der innerhalb des Gehäuses 11 angeordnet ist und über Leitungen 29 mit einer seitlichen elektrischen Anschlußbuchse 30 verbunden ist.The locking lever 19 is under the action of a compression spring 27. The button 22 is under the pretension of a compression spring 31 anchored on the switching arm 16. Its pivoting range is limited by a stop lug 22.2 (FIG. 1). The switching arm 16 interacts with a reed contact switch 28 which is arranged within the housing 11 and is connected via lines 29 to a lateral electrical connection socket 30.

Fig. 1 zeigt die Überwachungsvorrichtung 12 in ihrer Verriegelungsstellung, in welcher der Schaltarm 16 an seinem vorderen Ende direkt oder über den mit ihm gekoppelten Taster 22 durch den Riegelhebel 19 und an seinem hinteren Ende durch den Anschlag 25 des Gegenarmes 23.2 des Auflagearmes 23 in einer Ausgangsstellung gehalten ist, in welcher der Taster 22 in die Öffnung 20 des Gehäuses 11 zurückgezogen ist und sich an der Auflagestelle 23.1 mit der Tasterspitze 22.1 am Auflagearm 23 abstützt. In dieser Sperrstellung befinden sich in der Öffnung 20 des Gehäuses 11 der Freigabearm 19.1 des Riegelhebels 19 und die Auflagestelle 23.1 des Auflagearmes 23 auf gleicher Höhe. In dieser Stellung ist die Überwachungsvorrichtung unwirksam. Sie kann in dieser Stellung auch bei aufgesetzter Garnspule, aber nicht angedrücktem Garnspulenkörper, gehalten bleiben. In Fig. 1 ist mit strichpunktierten Linien ein mit einem Garnwickel 33 versehener zylindrischer Garnspulenkörper 34 eingezeichnet, der auf die Spulenhaltestange 10 als Reservespule nur so weit aufgeschoben ist, daß der Spulenkörperrand 34.1 gegen den eine schräge Aufgleitfläche bildenden Kopf des Auflagearmes 23 anliegt. Aktiviert wird die Überwachungsvorrichtung erst, wenn das Ende 34.1 des Spulenkörpers 34 gegen den Kopf des Auflagearmes 23 und weiter gegen den Freigabearm 19.1 des Riegelhebels 19 gedrückt wird, wie dies aus Fig. 2 ersichtlich ist.Fig. 1 shows the monitoring device 12 in its locked position, in which the switching arm 16 at its front end directly or via the button 22 coupled to it by the locking lever 19 and at its rear end by the stop 25 of the counter arm 23.2 of the support arm 23 is held in an initial position in which the button 22 is retracted into the opening 20 of the housing 11 and is supported at the support point 23.1 with the button tip 22.1 on the support arm 23. In this locked position, the release arm 19.1 of the locking lever 19 and the support point 23.1 of the support arm 23 are located in the opening 20 of the housing 11 at the same height. In this position, the monitoring device is ineffective. It can remain in this position even when the bobbin is attached but the bobbin is not pressed on. In Fig. 1 a dashed lines provided with a yarn package 33 cylindrical yarn bobbin 34 is drawn, which is pushed onto the bobbin holding rod 10 as a reserve bobbin only to such an extent that the bobbin edge 34.1 bears against the head of the support arm 23 forming an inclined sliding surface. The monitoring device is only activated when the end 34.1 of the bobbin 34 is pressed against the head of the support arm 23 and further against the release arm 19.1 of the locking lever 19, as can be seen from FIG. 2.

Fig. 2 zeigt eine auf den Spulenhaltestab 10 aufgeschobene konische Garnspule 32 mit einem konischen Garnspulenkörper 34ʹ, dessen Fußrand 34.1ʹ in das Gehäusefenster 20 so weit eingeschoben ist, bis der Auflagehebel 23 durch Aufgleiten seines Kopfes im Uhrzeigersinne gegen die Kraft der Feder 26 verschwenkt ist und seine Auflagestelle 23.1 auf dem freien Endbereich seiner äußeren Wickelfläche 35 aufliegt. Der Riegelhebel 19 ist durch den Anschlag des Spulenkörperrandes 34.1ʹ gegen seinen Freigabearm 19.1 ebenfalls im Uhrzeigersinne verschwenkt und somit der Schaltarm 16 freigegeben. Durch seine Freigabe hat sich der Schaltarm 16 unter der Einwirkung der Zugfeder 15 im Uhrzeigersinne so weit verschwenkt, bis der mit ihm gekoppelte Taster 22 mit seiner Tasterspitze 22.1 gegen die Stirnseite 33a des Garnwickels 33 der Garnspule 32 anliegt. Gleichzeitig wird die Tasterspitze 22.1 unter der Wirkung der Druckfeder 31 gegen die Wickelfläche 35 des Spulenkörpers 34ʹ gehalten. Das den Garnwickel 33 bildende Garn 36 wird von der festliegenden Garnspule 32 über den Kopf der Garnspule, also über die andere Stirnseite 33b des Garnwickels 33 hinweg abgezogen.Fig. 2 shows a conical yarn bobbin 32 pushed onto the bobbin holding rod 10 with a conical yarn bobbin 34 ', the foot edge 34.1' of which is pushed into the housing window 20 until the support lever 23 is pivoted against the force of the spring 26 by sliding its head clockwise and its support point 23.1 rests on the free end area of its outer winding surface 35. The locking lever 19 is also pivoted clockwise by the stop of the bobbin edge 34.1ʹ against its release arm 19.1 and thus the switching arm 16 is released. By releasing the switch arm 16 under the action of the tension spring 15 swiveled clockwise until the button 22 coupled to it rests with its button tip 22.1 against the end face 33a of the yarn package 33 of the yarn package 32. At the same time, the probe tip 22.1 is held under the action of the compression spring 31 against the winding surface 35 of the coil former 34ʹ. The yarn 36 forming the yarn package 33 is drawn off from the fixed yarn package 32 over the head of the yarn package, ie over the other end face 33b of the yarn package 33.

Sobald gemäß Fig. 3 auch die letzte Wickelschicht 33.1 des Garnwickels 33 vom Spulenkörperrand 34.1ʹ her abgezogen wird, entfällt der Gegendruck gegen die Tasterspitze 22.1 des Tasters 22. Die Feder 15 verschwenkt den Schaltarm 16 weiter im Uhrzeigersinn und schiebt den Taster 22 entlang der von Garn freigewordenen Wickelfläche 35 des Garnspulenkörpers 34ʹ bis in eine durch einen Gehäuseanschlag 37 begrenzte Schaltstellung, in welcher der Permanentmagnet 17 den Reed-Kontakt-Schalter 28 beeinflußt und somit ein Steuersignal auslöst, das zu einem Abschalten der zugeordneten Textilmaschine führt und eine optische oder akustische Meldung auslösen kann.As soon as the last winding layer 33.1 of the yarn package 33 is drawn off from the bobbin edge 34.1ʹ according to FIG. 3, the counterpressure against the tip 22.1 of the button 22 is eliminated. The spring 15 pivots the switching arm 16 further clockwise and pushes the button 22 along the Yarn-free winding surface 35 of the bobbin 34ʹ into a switching position limited by a housing stop 37, in which the permanent magnet 17 influences the reed contact switch 28 and thus triggers a control signal, which leads to a shutdown of the associated textile machine and an optical or acoustic message can trigger.

Wird der Garnspulenkörper 34ʹ abgezogen, werden sowohl der Riegelhebel 19 als auch der Auflagearm 23 freigegeben. Der Gegenarm 23.2 des Auflagearmes 23 wird durch die Zugfeder 26 im Gegenuhrzeigersinn zurückgeschwenkt und nimmt mit seinem Anschlag 25 den Schalthebel 16 gegen die Kraft der Zugfeder 15 mit, bis die aus Fig. 1 ersichtliche Sperrstellung erreicht ist, in welcher das vordere Ende des Schaltarmes 16 oder der dort angelenkte Taster 22 am freigegebenen Riegelhebel 19 einrasten.If the bobbin 34ʹ is removed, both the locking lever 19 and the support arm 23 are released. The counter arm 23.2 of the support arm 23 is pivoted back in a counterclockwise direction by the tension spring 26 and takes the switching lever 16 with its stop 25 against the force of the tension spring 15 until the locking position shown in FIG. 1 is reached, in which the front end of the switching arm 16 or the button 22 articulated there snap into place on the released locking lever 19.

Die Steuerschaltung, an welche der Schalter 28 angeschlossen ist, kann einen beliebigen passenden Aufbau haben. Die Tasterspitze 22.1 des Tasters 22 kann mehr oder weniger stark von der Wickelfläche 35 des Garnspulenkörpers abstehen, so daß sie an der zweitletzten oder drittletzten Garnwickelschicht anliegt und bereits beim Abbau dieser Garnwickelschichten freigegeben wird. Das Vorrichtungsgehäuse 11 kann mit einer nicht dargestellten Anzeigelampe versehen sein. Es kann aber auch eine gemeinsame Anzeigetafel für alle Garnspulenüberwachungsstellen einer Textilmaschine vorgesehen werden.The control circuit to which the switch 28 is connected can have any suitable structure. The button tip 22.1 of the button 22 can protrude more or less from the winding surface 35 of the bobbin, so that it bears against the second to last or third to last yarn winding layer and is already released when these yarn winding layers are broken down. The device housing 11 may be provided with an indicator lamp, not shown. However, a common display panel can also be provided for all yarn package monitoring points in a textile machine.

Claims (9)

  1. Apparatus for controlling the yarn remainder on a bobbin from which the yarn (36) is pulled off over head, with a probe (22) which lies sprung against yarn windings at the side facing away from the yarn-drawing side, characterised in that the probe (22) abuts against the face side (33a) of the yarn winding (33) and additionally against the winding surface (35) of the bobbin body (34'), and that it is longitudinally displaceable on the winding surface (35).
  2. Apparatus according to claim 1, characterised in that the probe (22) is hinged to a switch lever (16) which is pre-tensioned by a spring (spring 15) and lockable in an initial position, and is supportably mounted on a support arm (23) which is slid onto the winding surface (35) of the bobbin body (34') at the push-on end (34.1') of the bobbin.
  3. Apparatus according to claim 1 or 2, characterised in that the switch lever (16) or the probe (22), which is coupled therewith, in its initial position engages a spring-loaded bolt lever (19), which comprises a release arm (19.1) which is loaded by the push-on slide of the bobbin-body end (34.1').
  4. Apparatus according to one of claims 1 to 3, characterised in that the switch arm (16) is a pivot arm, to the free end of which is hinged the probe (22), which is also a pivot arm terminating in a free probe tip (22.1), which probe tip (22.1) in the locking position (Fig. 1) of the switch arm (16) abuts against the pivotable support arm (23).
  5. Apparatus according to one of claims 1 to 4, characterised in that the support arm (23) is a double-arm pivot arm, the one arm of which forms the abutment portion (23.1) which is slid onto the winding surface (35) of a bobbin body (34, 34'), and the counter-arm (23.2) of which is provided with a stop (25) which communicates with the switch arm (16) in the return position and is under the influence of a spring (26) which exerts a torque on the support arm (23) which is stronger than the counter force exerted by a spring (15) on the switch arm (16).
  6. Apparatus according to one of claims 1 to 5, characterised in that in the locking position (Fig. 1) of the switch arm (16) the abutment portion (23.1) of the abutment arm (23) and the release arm (19.1) of the bolt lever (19) are placed in the push-on direction of a bobbin at the same height.
  7. Apparatus according to one of claims 1 to 6, characterised in that the switch arm (16) is fitted with a permanent magnet (17) which in its maximum pivot position (Fig. 3) is disposed in the vicinity of an electrical, magnetically affected switch member (28).
  8. Apparatus according to one of claims 1 to 7, characterised in that its parts are accommodated in a common housing (11), which comprises in the control area an aperture (20) for the probe (22), the support arm (23) and the release arm (19.1) of the bolt lever (19).
  9. Apparatus according to one of claims 1 to 8, characterised in that the apparatus housing (11) comprises an accommodation aperture for mounting onto a bobbin receptacle, in particular on a spool support arm (10) or push-on mandrel.
EP87119073A 1987-01-24 1987-12-22 Apparatus for controlling the yarn remainder on bobbins Expired - Lifetime EP0276470B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3702049 1987-01-24
DE19873702049 DE3702049A1 (en) 1987-01-24 1987-01-24 DEVICE FOR MONITORING THE STOCK OF YARN ON SPOOLS

Publications (2)

Publication Number Publication Date
EP0276470A1 EP0276470A1 (en) 1988-08-03
EP0276470B1 true EP0276470B1 (en) 1991-05-15

Family

ID=6319453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87119073A Expired - Lifetime EP0276470B1 (en) 1987-01-24 1987-12-22 Apparatus for controlling the yarn remainder on bobbins

Country Status (6)

Country Link
US (1) US4827090A (en)
EP (1) EP0276470B1 (en)
JP (1) JPS63196468A (en)
DD (1) DD279865A5 (en)
DE (1) DE3702049A1 (en)
ES (1) ES2022290B3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4010469A1 (en) * 1990-03-31 1991-10-02 Schlafhorst & Co W Thread waxing monitor - has proximity sensors to register diminishing mass of paraffin body and stops action when it is at min. size
JPH058944A (en) * 1991-06-29 1993-01-19 Murata Mach Ltd Tube yarn supply system for automatic winder
CH685635A5 (en) * 1992-06-17 1995-08-31 Zellweger Uster Ag Arrangement for controlling the presence of yarns a spanned yarn layer on a textile machine.
JP4863294B2 (en) * 2007-05-30 2012-01-25 株式会社イノアックコーポレーション Automotive duct

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2507078A (en) * 1948-04-23 1950-05-09 Wright Melvin Switch for cable operated machinery
BE489683A (en) * 1948-07-31
BE493935A (en) * 1949-03-31
CH418920A (en) * 1964-06-29 1966-08-15 Schweiter Ag Maschf Thread residue sensor on an automatic winding machine
IT1206646B (en) * 1978-10-25 1989-04-27 Ib Int Brevetti DEVICE TO DETECT A CONDITION OF THE NEXT EXHAUST OF THE YARN ON A SPOOL AND CAUSE THE AUTOMATIC STOP OF THE MACHINE IN CIRCULAR KNITTING MACHINES, FOOTWEAR AND TEXTILES IN GENERAL AS A CONSEQUENCE.
FR2530603A1 (en) * 1982-07-20 1984-01-27 Asa Sa Novel type of yarn package and method for obtaining it.

Also Published As

Publication number Publication date
DE3702049A1 (en) 1988-08-04
EP0276470A1 (en) 1988-08-03
JPS63196468A (en) 1988-08-15
DE3702049C2 (en) 1989-03-16
DD279865A5 (en) 1990-06-20
ES2022290B3 (en) 1991-12-01
US4827090A (en) 1989-05-02

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