EP3095903B1 - Warp knitting machine - Google Patents

Warp knitting machine Download PDF

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Publication number
EP3095903B1
EP3095903B1 EP15167981.8A EP15167981A EP3095903B1 EP 3095903 B1 EP3095903 B1 EP 3095903B1 EP 15167981 A EP15167981 A EP 15167981A EP 3095903 B1 EP3095903 B1 EP 3095903B1
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EP
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Prior art keywords
carrier
warp
rod
knitting machine
support
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EP15167981.8A
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German (de)
French (fr)
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EP3095903A1 (en
Inventor
Herbert Wamser
Günter Schuler
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Karl Mayer Textilmaschinenfabrik GmbH
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Karl Mayer Textilmaschinenfabrik GmbH
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Priority to EP15167981.8A priority Critical patent/EP3095903B1/en
Priority to CN201610033010.4A priority patent/CN106167954B/en
Publication of EP3095903A1 publication Critical patent/EP3095903A1/en
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    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04BKNITTING
    • D04B27/00Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/06Needle bars; Sinker bars
    • D04B27/08Driving devices therefor
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04BKNITTING
    • D04B27/00Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/10Devices for supplying, feeding, or guiding threads to needles
    • D04B27/24Thread guide bar assemblies

Definitions

  • the invention relates to a warp knitting machine with at least one knitting tool bar, which carries a plurality of knitting tools and is connected by means of support levers with a support shaft.
  • a thread guide In a warp knitting machine various knitting tools work together to form stitches.
  • a thread guide To form a loop with a thread, a thread guide must be moved relative to a knitting needle parallel to the width direction of the knitting machine and often perpendicular thereto. The vertical movement is regularly effected by the corresponding Wirktechnikmaschinebarre is pivoted.
  • the Wirktechnikmaschinebarre is attached via support lever to a support shaft.
  • Warp knitting machines achieve working widths of several meters, over which also the knitting tool bar extends.
  • the knitting tools are arranged closely adjacent, wherein the distance between two adjacent knitting tools in an individual case may be less than 0.5 mm.
  • the different knitting tools must now work together as precisely as possible.
  • the guide needles must be able to swing through the needle lanes between the knitting needles without colliding with the knitting needles. Therefore, the knitting tools and the corresponding knitting tool bars on which the knitting tools are attached must be aligned as precisely as possible with each other prior to startup.
  • each active tool bar must neither deform too much in the operation of the warp knitting machine with respect to the set initial state, nor be displaced too undesirably in particular in the longitudinal direction in order to be able to exclude as much as possible collisions between the knitting tools during operation.
  • the support shaft is axially divided into several segments and stored each segment individually. Adjacent segments of the support shaft in this case have a sufficient distance, so that a thermal expansion of the individual segments can not sum in the entire axial direction. The problem of thermal expansion of the support shaft is thereby not solved, however the negative effects on the working tool bar are significantly reduced.
  • This solution has proven to be successful in practice to date, but it requires a high strength of Wirktechnikmaschinebarre.
  • To fix the segmented support shaft as a whole axially only the first segment is axially fixed to the machine and all other segments of the support shaft are connected to each other only on the knitting tool bar and the intermediate support lever.
  • the active tool bar in this solution must contribute more to the stability in the axial direction.
  • Under axial direction is here and below always the direction of the axis of rotation of the support shaft to understand.
  • the segments are stressed in the axial direction by various forces, such as machine vibrations. These forces must be absorbed via the support lever of the knitting tool bar.
  • these loads are always larger, and can lead to a strong deformation with insufficient strength of the active tool bar.
  • a sufficient pitch accuracy of the knitting tools is no longer guaranteed and it can lead to a deterioration in the quality of knitwear or collisions of knitting tools.
  • the invention is therefore based on the object to provide a warp knitting machine of the type mentioned, which has the simplest possible structure and yet the lowest possible sensitivity to thermal influences.
  • the support shaft a on the the support shaft further comprises at least two axially separate support tubes, wherein the rod extends through all support tubes, and wherein each support tube is at least partially connected via a connection point with the rod.
  • Tensions between the support tubes and the Wirkwerkmaschinebarre can be kept small and the Wirktechnikmaschinebarre is significantly relieved mechanically. It can also be connected to each support tube via exactly one connection point with the rod. Preferably, the connection points between the rod and support tube are formed circumferentially around the rod. Thus, the forces perpendicular to the axial direction due to the thermal expansion of the support tubes can be reduced.
  • the rod is axially fixed at one end to a pattern gear of the warp knitting machine. All connected to the bar support tubes, the support lever and the Wirktechnikmaschinebarre are thus held relative to this reference zero point axially.
  • the support tubes are made of metal.
  • Metal especially steel, is a proven and inexpensive material that can be easily and precisely machined.
  • the support tubes made of ceramic.
  • a preparation of the support tubes made of ceramic also allows a cost-effective design. In comparison to a use of metal or steel, however, ceramics have a lower coefficient of thermal expansion. Thus, a thermal expansion of each support tube can be reduced.
  • At least one support tube is releasably secured by a clamping connection on the rod.
  • the clamping connection can be made for example via a clamping bush. A change or readjustment of the individual support tubes is thus easy to carry out.
  • connection point between at least one support tube and the rod is arranged in the axial direction in the middle of the support tube.
  • the support tube can then expand or contract at a temperature change in the axial direction on either side of the joint, so that the displacement of the support tube body in the axial direction relative to the reference zero point (ie, for example, the connection between rod and pattern transmission) can sum only over half of the support tube length ,
  • connection point between a support tube and the rod is arranged in the axial direction at one end of the support tube.
  • Such a connection is particularly easy to assemble, for example when using a clamping bush.
  • At least one support tube is connected to the rod via at least one connection point at both axial ends of the support tube.
  • the fiber reinforced plastic rod in this embodiment must have sufficient strength to accommodate the shear stresses encountered.
  • At least one support tube is connected to the rod over the entire length of the support tube.
  • the connection preferably takes place by means of an adhesive bond filling the outside of the rod and the inside of the support tube over the entire surface.
  • the rod must have sufficient strength to absorb the occurring shear loads due to the thermal expansion of the support tube.
  • the support tubes in this case made of ceramic.
  • each support tube is connected to at least one support lever.
  • it can also be connected to one or more of the support tubes with two or more support levers.
  • At least one lever connection point between a support lever and a support tube is arranged offset axially relative to the connection point between the support tube and the rod.
  • Fig. 1 is a highly schematic front view of a warp knitting machine 1 according to a first embodiment of the invention shown.
  • the warp knitting machine 1 comprises a machine frame 2, which has a plurality of support walls 3 to 8, of which the outer support walls 3, 8 are formed as end-side axial end walls and the inner support walls 4 to 7 as partitions.
  • a pattern gear 9 is schematically indicated.
  • An active tool bar 10 is attached via support lever 11 to a support shaft 12.
  • the support shaft 12 can rotate and thus the support lever 11 together with the Pivot tool bar 10 pivot and move back and forth. Therefore, the support lever 11 rotatably connected to the support shaft 12.
  • the working tool bar 10 is formed of a plastic, preferably of a fiber-reinforced plastic, which has virtually no or only a very small temperature-dependent expansion.
  • a plurality, in this case three, support tubes 14, 15, 16 are arranged, through which a rod 17 extends from fiber-reinforced plastic.
  • the support tubes 14 to 16 are arranged concentrically along and around the rod 17.
  • the support tubes 14 to 16 in the form of cylindrical shells.
  • Between the support tubes 14 to 16 and the rod 17 is preferably a circumferential extending in the axial direction radial distance 18 is provided as out Fig. 2 and 4 seen.
  • the rod 17 is fixed at one end to a pattern gear 9 via a fixing 19, which is indicated here only schematically.
  • the support shaft 12 comprises a extending over the entire length of the support shaft rod 17 made of fiber reinforced plastic, and a plurality of axially separate support tubes 14, 15, 16. Between the support tubes 14, 15, 16 are provided in the axial direction of expansion gaps 20 , The expansion gaps 20 are dimensioned so that even at a maximum expected during operation temperature of the support tubes 14 to 16 no contact between adjacent support tubes 14 to 16 can occur.
  • connection points 21 are detachably fastened to the rod 17 via clamping connections 23.
  • the connection points 21 are provided according to this embodiment at the axial ends of the support tubes 14, 15, 16. This allows the simplest possible installation and maintenance.
  • connection points 22 are now arranged in the axial direction in the middle of the support tubes 14, 15, 16.
  • the connecting points 22 have here only a certain axial extent, but it is also conceivable that the adhesive bonds along the entire axial length of one or more support tubes 14, 15, 16 extend.
  • the axially central arrangement of the adhesive joints 25 allows here to reduce the effects of the thermal expansion of the support tubes 14, 15, 16, since they can no longer add up over the entire length of the support tubes 14, 15, 16.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Supports For Pipes And Cables (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Description

Die Erfindung betrifft eine Kettenwirkmaschine mit mindestens einer Wirkwerkzeugbarre, die eine Vielzahl an Wirkwerkzeugen trägt und mithilfe von Traghebeln mit einer Tragwelle verbunden ist.The invention relates to a warp knitting machine with at least one knitting tool bar, which carries a plurality of knitting tools and is connected by means of support levers with a support shaft.

In einer Kettenwirkmaschine arbeiten verschiedene Wirkwerkzeuge zusammen um Maschen zu bilden. Zur Bildung einer Masche mit einem Faden, muss ein Fadenführer relativ zu einer Wirknadel parallel zur Breitenrichtung der Wirkmaschine und vielfach auch senkrecht dazu bewegt werden. Die senkrechte Bewegung wird regelmäßig dadurch bewirkt, dass die entsprechende Wirkwerkzeugbarre verschwenkt wird. Zu diesem Zweck ist die Wirkwerkzeugbarre über Traghebel an einer Traghebelwelle befestigt.In a warp knitting machine various knitting tools work together to form stitches. To form a loop with a thread, a thread guide must be moved relative to a knitting needle parallel to the width direction of the knitting machine and often perpendicular thereto. The vertical movement is regularly effected by the corresponding Wirkwerkzeugbarre is pivoted. For this purpose, the Wirkwerkzeugbarre is attached via support lever to a support shaft.

Wenn die Kettenwirkmaschine in Betrieb ist, muss verhindert werden, dass die Wirkwerkzeuge miteinander kollidieren. Jede Kollision führt zu einer Störung, bei der die Maschine angehalten und gegebenenfalls gewartet werden muss. Insbesondere bei einer feinen Nadelteilung ist der Abstand der Wirkwerkzeuge äußerst gering, so dass die Gefahr einer Kollision von Wirkwerkzeugen besonders groß ist. Auch eine hohe Arbeitsgeschwindigkeit kann die Gefahr von Kollisionen erhöhen.When the warp knitting machine is in operation, it must be prevented that the knitting tools collide with each other. Any collision will result in a malfunction where the machine must be stopped and, if necessary, serviced. In particular, with a fine needle pitch of the distance of the knitting tools is extremely low, so that the risk of collision Effect tools is particularly large. Even a high operating speed can increase the risk of collisions.

Kettenwirkmaschinen erreichen Arbeitsbreiten von mehreren Metern, über die sich auch die Wirkwerkzeugbarre erstreckt. An der Wirkwerkzeugbarre sind die Wirkwerkzeuge dicht benachbart angeordnet, wobei der Abstand zwischen zwei benachbarten Wirkwerkzeugen im Einzelfall sogar weniger als 0,5 mm betragen kann. Im Wirkprozess müssen nun die verschiedenen Wirkwerkzeuge so genau wie möglich zusammenarbeiten. So müssen die Legenadeln beispielsweise durch die Nadelgassen zwischen den Wirknadeln hindurch schwingen können, ohne mit den Wirknadeln zu kollidieren. Daher müssen die Wirkwerkzeuge und die entsprechenden Wirkwerkzeugbarren an denen die Wirkwerkzeuge befestigt sind vor der Inbetriebnahme möglichst exakt aufeinander ausgerichtet werden. Weiterhin darf sich jede Wirkwerkzeugbarre im Betrieb der Kettenwirkmaschine weder gegenüber dem eingestellten Ausgangszustand zu stark verformen, noch insbesondere in Längsrichtung zu weit unerwünscht versetzt werden, um auch im Betrieb Kollisionen zwischen den Wirkwerkzeugen soweit wie möglich ausschließen zu können.Warp knitting machines achieve working widths of several meters, over which also the knitting tool bar extends. At the knitting tool bar the knitting tools are arranged closely adjacent, wherein the distance between two adjacent knitting tools in an individual case may be less than 0.5 mm. In the knitting process, the different knitting tools must now work together as precisely as possible. For example, the guide needles must be able to swing through the needle lanes between the knitting needles without colliding with the knitting needles. Therefore, the knitting tools and the corresponding knitting tool bars on which the knitting tools are attached must be aligned as precisely as possible with each other prior to startup. Furthermore, each active tool bar must neither deform too much in the operation of the warp knitting machine with respect to the set initial state, nor be displaced too undesirably in particular in the longitudinal direction in order to be able to exclude as much as possible collisions between the knitting tools during operation.

Im Betrieb einer Kettenwirkmaschine entstehen allerdings Temperaturunterschiede zwischen dem Stillstand der Maschine und der Produktionsphase. So können unterschiedliche Einflüsse wie beispielsweise Wärmeabgabe der Maschine selbst oder Temperaturschwankungen in der Maschinenumgebung beziehungsweise direkte oder indirekte Sonneneinstrahlung zu Temperaturveränderungen gegenüber dem Stillstand führen. Diese Temperaturunterschiede haben bei den meisten Elementen der Kettenwirkmaschine eine Wärmeausdehnung zur Folge. Dies gilt insbesondere bei den Elementen aus Metall. Wenn sich nun mit den Wirkwerkzeugbarren verbundene Maschinenteile thermisch ausdehnen, kann dies einerseits zu einer Verschlechterung der Qualität der erzeugten Wirkware und andererseits auch zu den oben genannten Kollisionen zwischen Wirkwerkzeugen führen.In the operation of a warp knitting machine, however, temperature differences arise between the stoppage of the machine and the production phase. Thus, different influences such as heat emission of the machine itself or temperature fluctuations in the machine environment or direct or indirect solar radiation can lead to temperature changes compared to the standstill. These temperature differences result in most elements of the warp knitting machine thermal expansion. This applies in particular to the elements made of metal. On the one hand, if thermal machine parts associated with the knitting tool bars thermally expand, this can lead to a deterioration in the quality of the produced parts Knit and on the other hand lead to the above collisions between knitting tools.

Es ist daher notwendig, die genannten Effekte der thermischen Ausdehnung von Bauteilen im Betrieb der Kettenwirkmaschine zu begrenzen. Hierzu ist beispielsweise bekannt, die Wirkwerkzeugbarren aus einem faserverstärkten Kunststoff auszubilden. Diese Kunststoffbarren sind in Bezug auf Materialausdehnung gegen Temperaturschwankungen relativ unempfindlich. Wenn derartige Kunststoffbarren aber an Tragwellen aus Metall befestigt sind, kann die Wärmeausdehnung der Tragwellen dennoch dazu führen, dass die Wirkwerkzeugbarren verformt werden. Diese Lösung ist also noch nicht befriedigend.It is therefore necessary to limit the mentioned effects of the thermal expansion of components during operation of the warp knitting machine. For this purpose, for example, it is known to form the knives bar from a fiber-reinforced plastic. These plastic ingots are relatively insensitive to temperature variations in terms of material expansion. However, if such plastic bars are fastened to support shafts made of metal, the thermal expansion of the support shafts can nevertheless lead to the active-tool bars being deformed. So this solution is not yet satisfactory.

Um das Problem weiter zu verringern wurde beispielsweise in EP 1 921 190 B1 vorgeschlagen, die Tragwellen durch eine Temperierungseinrichtung auf einer vorbestimmten Temperatur zu halten. Die Temperierung erfolgt dann beispielsweise durch ein Wärmeträgermedium wie Öl, das durch Hohlräume in der Tragwelle beziehungsweise den Hebelarmen fließen kann, um eine vorbestimmte Temperatur gleichmäßig auf die Tragwelle und die Hebelarme zu übertragen. Mit dieser Lösung lassen sich zwar in der Praxis die negativen Effekte der thermischen Ausdehnung der Maschinenbauteile begrenzen, sie ist jedoch relativ aufwendig und kostenintensiv.To further reduce the problem was for example in EP 1 921 190 B1 proposed to keep the support shafts by a temperature control at a predetermined temperature. The temperature is then, for example, by a heat transfer medium such as oil, which can flow through cavities in the support shaft or the lever arms to transmit a predetermined temperature uniformly on the support shaft and the lever arms. Although this solution can limit the negative effects of the thermal expansion of the machine components in practice, it is relatively expensive and expensive.

Eine weitere Möglichkeit den Problemen der thermischen Wärmeausdehnung entgegen zu treten wird beispielsweise in EP 2 116 644 A1 offenbart. Demnach wird die Tragwelle axial in mehrere Segmente unterteilt und jedes Segment einzeln gelagert. Benachbarte Segmente der Tragwelle weisen hierbei einen ausreichenden Abstand auf, so dass eine Wärmeausdehnung der einzelnen Segmente sich nicht in der gesamten axialen Längsrichtung summieren kann. Das Problem der Wärmeausdehnung der Tragwelle wird hierdurch zwar nicht gelöst, allerdings werden die negativen Auswirkungen auf die Wirkwerkzeugbarre deutlich verringert. Diese Lösung hat sich in der Praxis bis heute als erfolgreich erwiesen, sie erfordert jedoch eine hohe Festigkeit der Wirkwerkzeugbarre. Um die segmentierte Tragwelle insgesamt axial festzulegen ist nur das erste Segment axial an der Maschine fixiert und alle übrigen Segmente der Tragwelle sind nur über die Wirkwerkzeugbarre und die dazwischen liegenden Traghebel miteinander verbunden. Daher muss die Wirkwerkzeugbarre in dieser Lösung mehr zur Stabilität in Axialrichtung beitragen. Unter Axialrichtung ist hier und im Folgenden stets die Richtung der Drehachse der Tragwelle zu verstehen. So werden im Maschinenbetrieb die Segmente durch verschiedene Kräfte, wie beispielsweise durch Maschinenschwingungen, in axialer Richtung beansprucht. Diese Kräfte müssen über die Traghebel von der Wirkwerkzeugbarre aufgenommen werden. Dies führt zu einer erhöhten Belastung der Wirkwerkzeugbarre und der Verbindungsstellen mit den Traghebeln, wo aufgrund der schwer bearbeitbaren und rauen Oberfläche der Kunststoffbarre starke Spannungen auf das Material wirken können. Mit zunehmender Maschinengeschwindigkeit werden diese Belastungen immer größer, und können bei einer nicht ausreichenden Festigkeit der Wirkwerkzeugbarre zu einer starken Verformung führen. Auch in diesem Fall ist eine ausreichende Teilungsgenauigkeit der Wirkwerkzeuge nicht mehr gewährleistet und es kann zu einer Verschlechterung der Qualität der Wirkware beziehungsweise zu Kollisionen der Wirkwerkzeuge kommen.Another way to counteract the problems of thermal expansion is, for example, in EP 2 116 644 A1 disclosed. Accordingly, the support shaft is axially divided into several segments and stored each segment individually. Adjacent segments of the support shaft in this case have a sufficient distance, so that a thermal expansion of the individual segments can not sum in the entire axial direction. The problem of thermal expansion of the support shaft is thereby not solved, however the negative effects on the working tool bar are significantly reduced. This solution has proven to be successful in practice to date, but it requires a high strength of Wirkwerkzeugbarre. To fix the segmented support shaft as a whole axially, only the first segment is axially fixed to the machine and all other segments of the support shaft are connected to each other only on the knitting tool bar and the intermediate support lever. Therefore, the active tool bar in this solution must contribute more to the stability in the axial direction. Under axial direction is here and below always the direction of the axis of rotation of the support shaft to understand. Thus, in machine operation, the segments are stressed in the axial direction by various forces, such as machine vibrations. These forces must be absorbed via the support lever of the knitting tool bar. This leads to an increased burden of the active tool bar and the connection points with the support levers, where due to the difficult to machine and rough surface of the plastic bar strong stresses on the material can act. With increasing machine speed, these loads are always larger, and can lead to a strong deformation with insufficient strength of the active tool bar. Also in this case, a sufficient pitch accuracy of the knitting tools is no longer guaranteed and it can lead to a deterioration in the quality of knitwear or collisions of knitting tools.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Kettenwirkmaschine der eingangs genannten Art bereitzustellen, die einen möglichst einfachen Aufbau und dennoch eine möglichst geringe Empfindlichkeit gegenüber thermischen Einflüssen aufweist.The invention is therefore based on the object to provide a warp knitting machine of the type mentioned, which has the simplest possible structure and yet the lowest possible sensitivity to thermal influences.

Die oben genannte Aufgabe wird bei einer Kettenwirkmaschine der eingangs genannten Art dadurch gelöst, dass die Tragwelle einen sich über die gesamte Länge der Tragwelle einstreckten Stab aus faserverstärktem Kunststoff umfasst, wobei die Tragwelle weiterhin mindestens zwei in axialer Richtung getrennte Tragrohre umfasst, wobei sich der Stab durch alle Tragrohre erstreckt, und wobei jedes Tragrohr über mindestens eine Verbindungsstelle zumindest teilweise mit dem Stab verbunden ist.The above object is achieved in a warp knitting machine of the type mentioned above in that the support shaft a on the the support shaft further comprises at least two axially separate support tubes, wherein the rod extends through all support tubes, and wherein each support tube is at least partially connected via a connection point with the rod.

Eine derartige Lösung erhält die Vorteile einer geteilten Tragwelle. Eine thermische Ausdehnung wirkt immer nur auf die einzelnen Abschnitte der Tragwelle, also auf die Tragrohre mit begrenzter Länge. Es erfolgt also keine Summierung der Wärmeausdehnung über die gesamte Länge der Tragwelle. Gleichzeitig werden die einzelnen Tragrohre durch den Stab aus faserverstärktem Kunststoff in axialer Richtung festgelegt. So werden die im Betrieb der Kettenwirkmaschine entstehenden Kräfte, welche die Tragrohre in axialer Richtung beanspruchen direkt vom Stab aufgenommen und führen nicht wie zuvor zu einer Überbeanspruchung der Wirkwerkzeugbarre. Da ein Stab aus faserverstärktem Kunststoff gegenüber Temperaturschwankungen ebenso unempfindlich wie eine Wirkwerkzeugbarre aus Kunststoff ist, können die relativen Positionen der Tragrohre zu der Wirkwerkzeugbarre praktisch konstant gehalten werden. Spannungen zwischen den Tragrohren und der Wirkwerkzeugbarre lassen sich dadurch klein halten und die Wirkwerkzeugbarre wird mechanisch deutlich entlastet. Es kann auch jedes Tragrohr über genau eine Verbindungsstelle mit dem Stab verbunden sein. Vorzugsweise sind die Verbindungsstellen zwischen Stab und Tragrohr umlaufend um den Stab ausgebildet. So lassen sich die Kräfte senkrecht zur Axialrichtung in Folge der Wärmeausdehnung der Tragrohre verringern.Such a solution obtains the advantages of a split support shaft. A thermal expansion always acts only on the individual sections of the support shaft, ie on the support tubes of limited length. So there is no summation of the thermal expansion over the entire length of the support shaft. At the same time, the individual support tubes are fixed by the rod made of fiber-reinforced plastic in the axial direction. Thus, the resulting forces during operation of the warp knitting machine, which claim the support tubes in the axial direction are taken directly from the rod and do not lead to an overuse of the active tool bar as before. Since a rod of fiber-reinforced plastic is as insensitive to temperature fluctuations as a plastic Wirkwerkzeugbarre, the relative positions of the support tubes can be kept practically constant to the Wirkwerkzeugbarre. Tensions between the support tubes and the Wirkwerkzeugbarre can be kept small and the Wirkwerkzeugbarre is significantly relieved mechanically. It can also be connected to each support tube via exactly one connection point with the rod. Preferably, the connection points between the rod and support tube are formed circumferentially around the rod. Thus, the forces perpendicular to the axial direction due to the thermal expansion of the support tubes can be reduced.

In einer bevorzugten Ausführungsform ist der Stab an einem Ende an einem Mustergetriebe der Kettenwirkmaschine axial festgelegt. Alle am Stab verbundenen Tragrohre, die Traghebel und die Wirkwerkzeugbarre sind somit relativ zu diesem Referenz-Nullpunkt axial gehalten.In a preferred embodiment, the rod is axially fixed at one end to a pattern gear of the warp knitting machine. All connected to the bar support tubes, the support lever and the Wirkwerkzeugbarre are thus held relative to this reference zero point axially.

Vorzugsweise bestehen die Tragrohre aus Metall. Metall, insbesondere Stahl, ist ein bewährtes und kostengünstiges Material, das leicht und präzise bearbeitet werden kann.Preferably, the support tubes are made of metal. Metal, especially steel, is a proven and inexpensive material that can be easily and precisely machined.

Vorzugsweise bestehen die Tragrohre aus Keramik. Eine Herstellung der Tragrohre aus Keramik erlaubt ebenfalls eine kostengünstige Konstruktion. Im Vergleich zu einer Verwendung von Metall beziehungsweise Stahl, hat Keramik allerdings einen geringeren thermischen Ausdehnungskoeffizienten. Somit lässt sich eine Wärmeausdehnung jedes einzelnen Tragrohres reduzieren.Preferably, the support tubes made of ceramic. A preparation of the support tubes made of ceramic also allows a cost-effective design. In comparison to a use of metal or steel, however, ceramics have a lower coefficient of thermal expansion. Thus, a thermal expansion of each support tube can be reduced.

In einer weiteren bevorzugten Ausführungsform ist mindestens ein Tragrohr lösbar durch eine Klemmverbindung am Stab befestigt. Die Klemmverbindung kann beispielsweise über eine Klemmbuchse erfolgen. Ein Wechsel oder eine Nachjustierung der einzelnen Tragrohre ist somit leicht durchführbar.In a further preferred embodiment, at least one support tube is releasably secured by a clamping connection on the rod. The clamping connection can be made for example via a clamping bush. A change or readjustment of the individual support tubes is thus easy to carry out.

Es ist bevorzugt, wenn mindestens eine Verbindungsstelle zwischen mindestens einem Tragrohr und dem Stab in Axialrichtung in der Mitte des Tragrohres angeordnet ist. Das Tragrohr kann sich dann bei einer Temperaturveränderung in axialer Richtung beiderseits der Verbindungsstelle ausdehnen oder zusammenziehen, so dass sich die Verschiebung des Tragrohrkörpers in Axialrichtung gegenüber dem Referenz-Nullpunkt (also beispielsweise der Verbindung zwischen Stab und Mustergetriebe) nur über eine Hälfte der Tragrohrlänge summieren kann.It is preferred if at least one connection point between at least one support tube and the rod is arranged in the axial direction in the middle of the support tube. The support tube can then expand or contract at a temperature change in the axial direction on either side of the joint, so that the displacement of the support tube body in the axial direction relative to the reference zero point (ie, for example, the connection between rod and pattern transmission) can sum only over half of the support tube length ,

Es ist weiterhin von Vorteil, wenn mindestens eine Verbindungsstelle zwischen einem Tragrohr und dem Stab in Axialrichtung an einem Ende des Tragrohres angeordnet ist. Eine derartige Verbindung lässt sich besonders einfach montieren, beispielsweise bei Verwendung einer Klemmbuchse.It is also advantageous if at least one connection point between a support tube and the rod is arranged in the axial direction at one end of the support tube. Such a connection is particularly easy to assemble, for example when using a clamping bush.

In einer weiteren bevorzugten Ausführungsform ist mindestens ein Tragrohr über mindestens je eine Verbindungsstelle an beiden axialen Enden des Tragrohres mit dem Stab verbunden. Mit einer derartigen Lösung wird die axiale Wärmeausdehnung des Tragrohres größtenteils unterdrückt.In a further preferred embodiment, at least one support tube is connected to the rod via at least one connection point at both axial ends of the support tube. With such a solution, the axial thermal expansion of the support tube is largely suppressed.

Dementsprechend muss der Stab aus faserverstärktem Kunststoff in dieser Ausführungsform genügend Festigkeit aufweisen um die auftretenden Scherbelastungen aufnehmen zu können.Accordingly, the fiber reinforced plastic rod in this embodiment must have sufficient strength to accommodate the shear stresses encountered.

In einer weiteren bevorzugten Ausführungsform ist mindestens ein Tragrohr über die gesamte Länge des Tragrohres mit dem Stab verbunden. Vorzugsweise erfolgt die Verbindung in diesem Fall durch eine die Außenseite des Stabes sowie die Innenseite des Tragrohres ganzflächig ausfüllende Klebverbindung. Eine derartige Verbindung erlaubt es die axiale Wärmeausdehnung des Tragrohres praktisch völlig zu unterdrücken. Auch in diesem Fall muss der Stab über eine ausreichende Festigkeit verfügen um die auftretenden Scherbelastungen durch die thermische Ausdehnung des Tragrohres aufzunehmen. Vorteilhafterweise bestehen die Tragrohre in diesem Fall aus Keramik.In a further preferred embodiment, at least one support tube is connected to the rod over the entire length of the support tube. In this case, the connection preferably takes place by means of an adhesive bond filling the outside of the rod and the inside of the support tube over the entire surface. Such a connection allows the axial thermal expansion of the support tube to be virtually completely suppressed. Also in this case, the rod must have sufficient strength to absorb the occurring shear loads due to the thermal expansion of the support tube. Advantageously, the support tubes in this case made of ceramic.

In einer weiteren bevorzugten Ausführungsform ist jedes Tragrohr mit mindestens einem Traghebel verbunden. Es können jedoch auch einzelne oder mehrere der Tragrohre mit zwei oder mehr Traghebeln verbunden sein.In a further preferred embodiment, each support tube is connected to at least one support lever. However, it can also be connected to one or more of the support tubes with two or more support levers.

Es ist außerdem von Vorteil wenn mindestens eine Traghebelverbindungsstelle zwischen einem Traghebel und einem Tragrohr axial gegenüber der Verbindungsstelle zwischen dem Tragrohr und dem Stab versetzt angeordnet ist. Durch eine geeignete Wahl des axialen Versatzes zwischen den Traghebelverbindungsstellen zwischen Traghebeln und Tragrohren relativ zu den Verbindungsstellen zwischen Tragrohr und Stab lassen sich die Belastungen auf die Wirkwerkzeugbarre gleichmäßiger verteilen.It is also advantageous if at least one lever connection point between a support lever and a support tube is arranged offset axially relative to the connection point between the support tube and the rod. By a suitable choice of the axial offset between the Traghebelverbindungsstellen between support levers and support tubes relative to the connection points between the support tube and Rod, the loads can be distributed more evenly on the knitting tool bar.

Die Erfindung wird im Folgenden anhand eines bevorzugten Ausführungsbeispiels in Verbindung mit der Zeichnung beschrieben. Hierin zeigen:

Fig. 1
eine schematische Darstellung einer Kettenwirkmaschine von vorne im Ausschnitt und
Fig. 2
einen vergrößerten Ausschnitt der Kettenwirkmaschine entsprechend Fig. 1 in teilweiser Schnittansicht,
Fig. 3
eine zweite Ausführungsform einer erfindungsgemäßen Kettenwirkmaschine in schematischer Darstellung von vorne und
Fig. 4
einen vergrößerten Abschnitt der Kettenwirkmaschine entsprechend Fig. 3, teilweise in Schnittdarstellung.
The invention will be described below with reference to a preferred embodiment in conjunction with the drawings. Herein show:
Fig. 1
a schematic representation of a warp knitting machine from the front in the neck and
Fig. 2
an enlarged section of the warp knitting machine accordingly Fig. 1 in partial sectional view,
Fig. 3
a second embodiment of a warp knitting machine according to the invention in a schematic representation of the front and
Fig. 4
an enlarged portion of the warp knitting machine accordingly Fig. 3 , partially in section.

In Fig. 1 ist eine stark schematisierte Frontansicht einer Kettenwirkmaschine 1 nach einer ersten Ausführungsform der Erfindung gezeigt. Die Kettenwirkmaschine 1 umfasst ein Maschinengestell 2, welches mehrere Stützwände 3 bis 8 aufweist, wovon die äußeren Stützwände 3, 8 als stirnseitige axiale Endwände und die inneren Stützwände 4 bis 7 als Zwischenwände ausgebildet sind. An einem axialen Ende der Kettenwirkmaschine 1 ist schematisch ein Mustergetriebe 9 angedeutet.In Fig. 1 is a highly schematic front view of a warp knitting machine 1 according to a first embodiment of the invention shown. The warp knitting machine 1 comprises a machine frame 2, which has a plurality of support walls 3 to 8, of which the outer support walls 3, 8 are formed as end-side axial end walls and the inner support walls 4 to 7 as partitions. At one axial end of the warp knitting machine 1, a pattern gear 9 is schematically indicated.

Eine Wirkwerkzeugbarre 10 ist über Traghebel 11 an einer Tragwelle 12 befestigt. Durch einen lediglich angedeuteten Antrieb 13 lässt sich die Tragwelle 12 drehen und somit die Traghebel 11 mitsamt der Wirkwerkzeugbarre 10 verschwenken und hin und her bewegen. Daher sind die Traghebel 11 drehfest mit der Tragwelle 12 verbunden. Die Wirkwerkzeugbarre 10 ist aus einem Kunststoff, vorzugsweise aus einem faserverstärkten Kunststoff gebildet, welcher praktisch keine oder nur eine sehr geringe temperaturabhängige Ausdehnung aufweist.An active tool bar 10 is attached via support lever 11 to a support shaft 12. By a merely indicated drive 13, the support shaft 12 can rotate and thus the support lever 11 together with the Pivot tool bar 10 pivot and move back and forth. Therefore, the support lever 11 rotatably connected to the support shaft 12. The working tool bar 10 is formed of a plastic, preferably of a fiber-reinforced plastic, which has virtually no or only a very small temperature-dependent expansion.

Entlang der Tragwelle 12 sind mehrere, in diesem Fall drei, Tragrohre 14, 15, 16 angeordnet, durch die sich ein Stab 17 aus faserverstärktem Kunststoff erstreckt. Es sind aber auch Ausführungsformen mit 2, 4, 5 oder noch mehr Tragrohren vorstellbar. Die Tragrohre 14 bis 16 sind konzentrisch entlang und um den Stab 17 angeordnet. Vorzugsweise haben die Tragrohre 14 bis 16 die Form von Zylinderschalen. Zwischen den Tragrohren 14 bis 16 und dem Stab 17 ist vorzugsweise ein umlaufender sich in Axialrichtung erstreckender radialer Abstand 18 vorgesehen, wie aus Fig. 2 und 4 ersichtlich.Along the support shaft 12 a plurality, in this case three, support tubes 14, 15, 16 are arranged, through which a rod 17 extends from fiber-reinforced plastic. But there are also embodiments with 2, 4, 5 or even more support tubes conceivable. The support tubes 14 to 16 are arranged concentrically along and around the rod 17. Preferably, the support tubes 14 to 16 in the form of cylindrical shells. Between the support tubes 14 to 16 and the rod 17 is preferably a circumferential extending in the axial direction radial distance 18 is provided as out Fig. 2 and 4 seen.

Der Stab 17 ist an einem Ende an einem Mustergetriebe 9 über eine Fixierung 19 festgelegt, die hier nur schematisch angedeutet ist.The rod 17 is fixed at one end to a pattern gear 9 via a fixing 19, which is indicated here only schematically.

Wie schon zuvor erwähnt umfasst die Tragwelle 12 einen sich über die gesamte Länge der Tragwelle erstreckenden Stab 17 aus faserverstärktem Kunststoff, sowie mehrere in axialer Richtung getrennte Tragrohre 14, 15, 16. Zwischen den Tragrohren 14, 15, 16 sind in Axialrichtung Dehnungsspalten 20 vorgesehen. Die Dehnungsspalten 20 sind so bemessen, dass auch bei einer maximalen während des Betriebes zu erwartenden Temperatur der Tragrohre 14 bis 16 kein Kontakt zwischen benachbarten Tragrohren 14 bis 16 vorkommen kann.As already mentioned, the support shaft 12 comprises a extending over the entire length of the support shaft rod 17 made of fiber reinforced plastic, and a plurality of axially separate support tubes 14, 15, 16. Between the support tubes 14, 15, 16 are provided in the axial direction of expansion gaps 20 , The expansion gaps 20 are dimensioned so that even at a maximum expected during operation temperature of the support tubes 14 to 16 no contact between adjacent support tubes 14 to 16 can occur.

Jedes der Tragrohre 14 bis 16 ist über eine Verbindungsstelle 21, 22 mit dem Stab 17 verbunden. Mehr als eine Verbindungsstelle 21, 22 zwischen den Tragrohren 14 bis 16 und dem Stab 17, beispielsweise an beiden axialen Enden jedes Tragrohres 14 bis 16 ist aber auch möglich. Entsprechend der Ausführungsform in Fig. 1 und 2 sind die Verbindungsstellen 21 lösbar über Klemmverbindungen 23 am Stab 17 befestigt. Die Verbindungsstellen 21 sind entsprechend dieser Ausführungsform an den axialen Enden der Tragrohre 14, 15, 16 vorgesehen. Dies erlaubt eine möglichst einfache Montage und Wartung.Each of the support tubes 14 to 16 is connected to the rod 17 via a connection point 21, 22. More than one joint 21, 22 between the support tubes 14 to 16 and the rod 17, for example, at both axial But ends of each support tube 14 to 16 is also possible. According to the embodiment in FIG Fig. 1 and 2 the connection points 21 are detachably fastened to the rod 17 via clamping connections 23. The connection points 21 are provided according to this embodiment at the axial ends of the support tubes 14, 15, 16. This allows the simplest possible installation and maintenance.

In Fig. 3 und 4 ist eine zweite erfindungsgemäße Kettenwirkmaschine 24 dargestellt. Sich entsprechende Merkmale sind mit den gleichen Bezugszeichen wie in Fig. 1 und 2 bezeichnet. Gemäß dieser Ausführungsform sind die Verbindungsstellen 22 nun in Axialrichtung in der Mitte der Tragrohre 14, 15, 16 angeordnet. Die Verbindungsstellen 22 weisen hier lediglich eine gewisse axiale Ausdehnung auf, es ist jedoch auch vorstellbar, dass die Klebverbindungen sich entlang der gesamten axialen Länge eines oder mehrere Tragrohre 14, 15, 16 erstrecken. Die axial mittige Anordnung der Klebverbindungen 25 erlaubt hier die Effekte der thermischen Ausdehnung der Tragrohre 14, 15, 16 reduzieren, da sie sich nicht mehr auf der gesamten Länge der Tragrohre 14, 15, 16 aufaddieren können.In 3 and 4 a second warp knitting machine 24 according to the invention is shown. Corresponding features are identified by the same reference numerals as in FIG Fig. 1 and 2 designated. According to this embodiment, the connection points 22 are now arranged in the axial direction in the middle of the support tubes 14, 15, 16. The connecting points 22 have here only a certain axial extent, but it is also conceivable that the adhesive bonds along the entire axial length of one or more support tubes 14, 15, 16 extend. The axially central arrangement of the adhesive joints 25 allows here to reduce the effects of the thermal expansion of the support tubes 14, 15, 16, since they can no longer add up over the entire length of the support tubes 14, 15, 16.

Claims (12)

  1. Warp-knitting machine (1, 24) having at least one warp-knitting tool bar (10) which carries a multiplicity of warp-knitting tools (10) and with the aid of carrier levers (11) is connected to a carrier shaft (12), characterized in that the carrier shaft (12) comprises a rod (17) which is from fibre-reinforced plastics material and which extends across the entire length of the carrier shaft, wherein the carrier shaft (12) furthermore comprises at least two carrier tubes (14, 15, 16) which are separated in the axial direction, wherein the rod (17) extends through all carrier tubes (14, 15, 16), and wherein each carrier tube (14, 15, 16) by way of at least one connection point (21, 22) is at least partially connected to the rod (17).
  2. Warp-knitting machine (1, 24) according to Claim 1, characterized in that the rod (17) at one end is axially fixed to a pattern gear (9) of the warp-knitting machine (1, 24).
  3. Warp-knitting machine (1, 24) according to Claim 1 or 2, characterized in that the carrier tubes (14, 15, 16) are composed of metal.
  4. Warp-knitting machine (1, 24) according to one of Claims 1 to 3, characterized in that the carrier tubes (14, 15, 16) are composed of ceramic.
  5. Warp-knitting machine (1, 24) according to one of Claims 1 to 4, characterized in that at least one carrier tube (14, 15, 16) is releasably fixed to the rod (17) by way of a clamping connection (23).
  6. Warp-knitting machine (1, 24) according to one of Claims 1 to 5, characterized in that at least one carrier tube (14, 15, 16) is unreleasably fixed to the rod (17).
  7. Warp-knitting machine (1, 24) according to one of Claims 1 to 6, characterized in that at least one connection point (21, 22) is disposed between a carrier tube (14, 15, 16) and the rod (17), so as to be in the centre of the carrier tube (14, 15, 16) in the axial direction.
  8. Warp-knitting machine (1, 24) according to one of Claims 1 to 7, characterized in that at least one connection point (21, 22) is disposed between a carrier tube (14, 15, 16) and the rod (17), so as to be at one end of the carrier tube (14, 15, 16) in the axial direction.
  9. Warp-knitting machine (1, 24) according to one of Claims 1 to 8, characterized in that at least one carrier tube (14, 15, 16) by way of in each case at least one connection point (21, 22) is connected to the rod (17) at both axial ends of the carrier tube (14, 15, 16).
  10. Warp-knitting machine (1, 24) according to one of Claims 1 to 9, characterized in that at least one carrier tube (14, 15, 16) is connected to the rod (17) across the entire length of the carrier tube (14, 15, 16).
  11. Warp-knitting machine (1, 24) according to one of Claims 1 to 10, characterized in that each carrier tube (14, 15, 16) is connected to at least one carrier lever (11).
  12. Warp-knitting machine (1, 24) according to one of Claims 1 to 11, characterized in that at least one carrier-lever connection point is disposed between a carrier lever (11) and a carrier tube (14, 15, 16), so as to be axially offset in relation to the connection point (21, 22) between the carrier tube (14, 15, 16) and the rod (17).
EP15167981.8A 2015-05-18 2015-05-18 Warp knitting machine Active EP3095903B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15167981.8A EP3095903B1 (en) 2015-05-18 2015-05-18 Warp knitting machine
CN201610033010.4A CN106167954B (en) 2015-05-18 2016-01-19 Tricot machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15167981.8A EP3095903B1 (en) 2015-05-18 2015-05-18 Warp knitting machine

Publications (2)

Publication Number Publication Date
EP3095903A1 EP3095903A1 (en) 2016-11-23
EP3095903B1 true EP3095903B1 (en) 2017-06-28

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ID=53177277

Family Applications (1)

Application Number Title Priority Date Filing Date
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EP (1) EP3095903B1 (en)
CN (1) CN106167954B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3421653B1 (en) * 2017-06-26 2019-09-18 KARL MAYER Textilmaschinenfabrik GmbH Warp knitting tool bar

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD220632A1 (en) * 1984-01-20 1985-04-03 Textimaforschung Malimo Veb LEGESCHIENENSPERSATZVORRICHTUNG FOR QUICK-OPERATING CHAIN, IN PARTICULAR INTERIOR MACHINES
DE102004023802B3 (en) * 2004-05-13 2005-12-22 Liba-Maschinenfabrik Gmbh Multiple needle knitting machine for industrial use has drive shaft, levers and bars carrying rows of needles all made of carbon fiber reinforced plastics with same coefficient of thermal expansion
EP1921190B1 (en) 2006-11-07 2012-10-17 Karl Mayer Textilmaschinenfabrik GmbH Warp knitting machine
EP2116644A1 (en) 2008-05-07 2009-11-11 Karl Mayer Textilmaschinenfabrik GmbH Warp knitting machine
CN201817671U (en) * 2010-09-28 2011-05-04 常州市润源经编运用工程技术研究中心有限公司 Transmission structure of warp knitting machine
CN103343422A (en) * 2013-07-12 2013-10-09 常德纺织机械有限公司 Warp knitting machine with flexible swing shafts

Non-Patent Citations (1)

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Title
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CN106167954B (en) 2018-02-16
CN106167954A (en) 2016-11-30
EP3095903A1 (en) 2016-11-23

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