EP2728045B1 - Warp knitting machine - Google Patents

Warp knitting machine Download PDF

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Publication number
EP2728045B1
EP2728045B1 EP20120007543 EP12007543A EP2728045B1 EP 2728045 B1 EP2728045 B1 EP 2728045B1 EP 20120007543 EP20120007543 EP 20120007543 EP 12007543 A EP12007543 A EP 12007543A EP 2728045 B1 EP2728045 B1 EP 2728045B1
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EP
European Patent Office
Prior art keywords
warp knitting
knitting machine
machine according
guide bar
pattern device
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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.)
Not-in-force
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EP20120007543
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German (de)
French (fr)
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EP2728045A1 (en
Inventor
Herbert Wamser
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Karl Mayer Textilmaschinenfabrik GmbH
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Karl Mayer Textilmaschinenfabrik GmbH
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Application filed by Karl Mayer Textilmaschinenfabrik GmbH filed Critical Karl Mayer Textilmaschinenfabrik GmbH
Priority to EP20120007543 priority Critical patent/EP2728045B1/en
Priority to CN201310027829.6A priority patent/CN103806215B/en
Publication of EP2728045A1 publication Critical patent/EP2728045A1/en
Application granted granted Critical
Publication of EP2728045B1 publication Critical patent/EP2728045B1/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/10—Devices for supplying, feeding, or guiding threads to needles
    • D04B27/24—Thread guide bar assemblies
    • D04B27/26—Shogging devices therefor

Definitions

  • the invention relates to a warp knitting machine with a machine frame, at least one guide bar and a pattern device with a circumferential control surface, which drives the guide bar in an offset direction.
  • Such a warp knitting machine is for example off DE 195 04 467 C2 known.
  • the knitting needles are usually arranged on a knitting needle and the guide needles on a Garnadelbarre.
  • the Garnadelbarre is through the pattern device in Displacement direction displaced, ie in the direction of its longitudinal extent.
  • the guide bar is pivotable transversely to the offset direction. During this pivoting movement the guide needles are guided through alleys between the knitting needles.
  • the distance between adjacent guide needles or between adjacent knitting needles is relatively small. It is often in the order of 1 mm and may well be less than 1 mm.
  • the guide needles must therefore be able to be moved relative to the knitting needles with high accuracy in order to avoid a collision between the guide needles and the knitting needles.
  • a warp knitting machine is often subjected to temperature changes.
  • temperature differences arise between machine downtime and a production phase. In the first place, these temperature differences arise due to different heat energy outputs of the machine itself, but also external influences, such as temperature differences in the machine environment or direct sunlight, can change the temperature of the warp knitting machine.
  • a change in temperature in many elements of the warp knitting machine results in a change in length due to thermal expansion.
  • Such thermal expansion can cause the trajectory of the guide needles to change relative to the knitting needles. This can easily lead to division problems, namely unauthorized close intervals between the guide needles and the knitting needles, which can lead to a collision of knitting tools.
  • warp knitting machine If the warp knitting machine is kept at an elevated temperature, division problems can be largely avoided. However, there are relatively high costs in the production and operation of the warp knitting machine because a heater must be provided and operated, the operation of the heater has a significant energy consumption.
  • US 2,921,452 A shows a warp knitting machine with a guide bar and a pattern device with a rotating control surface which drives the guide bar in an offset direction. Between the guide bar and a voltage applied to the control surface ram a variable length connection is arranged.
  • DE 489 059 C shows a pattern gear for a flat warp knitting machine, in which a guide bar is driven by a pattern device with a rotating control surface. Between the pattern device and the guide bar driving ram a step portion is arranged, with the aid of a distance between the plunger and the control surface is variable.
  • the invention has for its object to keep in a cost effective manner a pitch deviation of the guide bar, which is due to changes in environmental conditions, small or to avoid.
  • This object is achieved in a warp knitting machine of the type mentioned above in that the patterning device is displaced by a correction drive in the offset direction.
  • the pattern device is arranged at one end of the machine frame. So if the machine frame lengthens with a temperature increase, the pattern device is displaced. Even if this shift is relatively small, it can lead to division problems. This is counteracted by the fact that the pattern device is completely or partially displaced by the correction drive to compensate for the thermal expansion of the machine frame. This compensation movement is then just if relatively small, because they basically just have to compensate for the thermal expansion of the machine frame.
  • the correction drive can thus move the pattern device in the offset direction on the machine frame or away from the machine frame. In this case, the pattern device can be displaced as a whole.
  • the correction drive acts on the pattern device via a reduction gear. This makes it possible to control the change of the pattern device very accurately. Even if the correction drive, which can be embodied, for example, as an electric rotary motor or as a stepping motor, covers a greater path or angle of rotation, the movement acting on the pattern device can be kept small.
  • the correction drive acts on the pattern device via a spindle drive.
  • a spindle drive two elements cooperate, which are connected to each other via a thread pairing. Depending on the pitch of the thread pairing, a linear movement with a very large reduction can then be generated.
  • the correction drive changes the length of a transmission element between the control surface and the guide bar.
  • the control surface is often replaced by a rotating Disc formed whose circumference has a profile that controls the movement of the guide bar.
  • a pattern chain can be provided to control the offset movement of the guide bar.
  • a transmission element often referred to as "offset slider" provided between the guide bar and the control surface. If the length of the transmission element is changed, this also compensates for the thermal expansion of the machine frame.
  • the transmission element has at least two sections connected to one another by a thread pairing, which sections can be rotated relative to one another by the correction drive.
  • the change in the length of the transfer element needed to compensate for the thermal expansion of the machine frame is relatively small, so that it can be effected by twisting two elements which are connected together by threading.
  • the correction drive is controlled by a controller which is connected to a sensor arrangement which determines an influence of at least one environmental condition on the machine frame.
  • a controller which is connected to a sensor arrangement which determines an influence of at least one environmental condition on the machine frame.
  • the controller controls the correction drive so that the thermal expansion of the machine frame is compensated.
  • the sensor arrangement it is preferable for the sensor arrangement to have a distance sensor which determines a distance between the guide bar and a fixed point assigned to the pattern device and outputs a corresponding output signal to the controller.
  • the pattern device is arranged at one end of the machine frame. As the length of the machine frame changes, the position of the pattern device changes. In a guide bar made of a plastic, however, their length practically does not change with a temperature change. One can now determine an actual distance between the pattern device and the guide bar and compare this actual distance with a desired value. If there are differences, the correction drive is put into operation to bring the difference to zero.
  • the controller evaluates the output signal at predetermined positions of the control surface. When the control surface is moved, this movement creates a movement of the guide bar in the offset direction. This results in an output signal of the distance sensor that changes continuously. However, one can determine a "zero point" at which the guide bar is, for example, in a neutral position or at a predetermined reversal point. The distance between the guide bar and the fixed point should correspond to the setpoint value at this zero point or reversal point. Otherwise, a correction movement is necessary.
  • the controller continuously evaluates the output signal and with a setpoint function corresponding to a control cam of the control surface compares.
  • the controller has the information about the movement of the guide bar in the offset direction. It can continuously or at short intervals determine whether the guide bar actually follows this control curve or whether a distance has overlapped. Should such a distance be seen, the correction drive can be put into operation to compensate for the thermal expansion of the machine frame.
  • the sensor arrangement has a temperature sensor which determines a temperature of the machine frame.
  • the temperature can certainly be determined at various points of the machine frame. A temperature determination on the pattern device is possible. From the temperature of the machine frame, one can then obtain the information about the change in length of the machine frame, due to which the correction drive is put into operation to compensate for the thermal expansion.
  • the controller has a temperature-position deviation ratio curve and calculates a correction value from the temperature and the temperature-position deviation ratio curve. With the calculated value, the controller can then control the correction drive to compensate for the thermal expansion of the machine frame.
  • Fig. 1 shows in highly schematic form a warp knitting machine 1 with a machine frame 2, which carries a knitting needle bar 3, on the knitting needles 4 are arranged side by side.
  • a main shaft not shown is arranged, which moves the knitting needle 3, in simple terms, up and down.
  • the machine frame 2 also carries a guide bar 5, are arranged on the guide needles 6.
  • the guide bar 5 is driven via the main shaft so that the guide needles 6 perpendicular to the plane (based on the representation of Fig. 1 ) are pivoted.
  • the guide needles 6 pass through streets between the knitting needles. 4
  • a pattern device 7 is arranged, which has a cam disk 8 in the present case.
  • the cam disk 8 has a control surface 9 on its circumference.
  • an offset slider 10 as a transmission element, which acts on a plunger 11 on the guide bar 5 and drives the guide bar 5 in a so-called offset direction.
  • the displacement direction corresponds to the longitudinal extent of the guide bar 5.
  • the guide bar 5 is loaded by not shown return means, such as springs, in the direction of the pattern device 7, so that the offset slide 10 is always applied to the control surface 9.
  • the guide bar 5 and often the knitting needle bar 3 are formed from a fiber-reinforced plastic, that is, from a material having a relatively low thermal expansion.
  • the thermal expansion of fiber reinforced plastics is negligible in practice.
  • the situation is different with the machine frame 2.
  • the machine frame 2 changes its length with the temperature. As the temperature increases, the machine frame 2 becomes slightly longer. This extension of the machine frame 2 causes the position of the pattern device 7 changed and accordingly the guide bar 5 is driven in a different way. The offset movement of the guide bar 5 then has changed start and end points or reversal points.
  • the pattern device 7 is provided with a correction drive 12 which can displace the pattern device 7 relative to the machine frame 2 in the offset direction.
  • a correction drive 12 which can displace the pattern device 7 relative to the machine frame 2 in the offset direction.
  • the position of the pattern device 7 is changed as a whole.
  • the patterning device 7 is moved by the correction drive 12 by the amount of extension in the direction of the guide bar 5, so that the movement path of the guide bar 5 in the offset direction again corresponds to the desired trajectory, through the control surface. 9 the cam 8 is specified.
  • the correction drive 12 is arranged between a head piece 13 of the machine frame 2 and the pattern device 7. Between the header 13 and the pattern device 7, a slide rail assembly 14 is provided, on which the pattern device 7 can slide relative to the head piece 13 when the correction drive 12 is actuated. The actuation of the correction drive 12 can be done manually by an operator.
  • a distance sensor 15 is provided, which is arranged on a stand which forms a fixed point 16.
  • the distance between the fixed point 16 and the pattern device 7 is so small that a possible thermal expansion of the machine frame 2 or the head piece 13 has no practically relevant influence on a change in the position of the fixed point 16 relative to the pattern device 7. It can therefore be assumed for the practice that the fixed point 16 is assigned to the pattern device 7.
  • the distance sensor 15 is connected to a controller 17, which in turn drives the correction drive 7 and actuates the correction drive 12 in response to an output signal of the distance sensor 15.
  • the guide bar 5 moves under the influence of the control surface 9 back and forth.
  • the control surface 9 In order to effect the correction of the position of the pattern device 7, there are various possibilities.
  • the correction driver 12 is operated to make the actual distance coincident with the target distance.
  • the distance sensor 15 continuously determines the distance between the fixed point 16 and the guide bar 5 and reports to the controller 17.
  • the desired position curve of the guide bar 5 is stored. This desired position curve of the guide bar 5 is predetermined by the control surface 9. If the actual position curve of the guide bar does not match the desired position curve of the guide bar 5, then the correction drive 12 is actuated to restore the match. Since the deviation between the actual positional curve and the desired positional curve consists only in an offset caused by the thermal expansion of the machine frame 2, the correspondence between the actual positional curve and the desired positional curve of the guide bar 5 can be achieved by a simple displacement make the pattern device 7.
  • the position of the pattern means 7 is changed as a whole, i. the pattern device 7 is changed by the correction drive 12 as a whole.
  • An alternative to the displacement of the pattern device 7 according to the invention is that while leaving the position of the pattern device 7 as a whole unchanged, but the length of the offset slider 10 changed.
  • the change in the length of the offset slider 10 corresponds to the thermal expansion of the machine frame 2.
  • the change in the length of the offset slider 10 is effected by a further correction drive 18.
  • the pattern device 7 can be moved, so to speak, as a block. This presentation was chosen for clarity. It is, of course, possible for the pattern device 7 to be in total, i. with their entire housing, to shift relative to the machine frame 2. But it is also possible to shift only parts of the pattern device 7, in particular the cam 8, in the offset direction.
  • Fig. 2 shows a highly schematic representation of a modified embodiment of a warp knitting machine 1, in which the same elements are provided with the same reference numerals.
  • the distance sensor 5 is replaced by a plurality of temperature sensors 19-21, which determine the temperatures at different locations of the machine frame 2. From the determined temperatures and a temperature position deviation ratio curve, the controller 17 constantly calculates a correction value with which the correction drive 12 can be controlled to compensate for the thermal expansion of the machine frame 2.
  • Fig. 3 shows a possible embodiment of the correction drive 12.
  • the correction drive 12 has a drive motor 22 which acts via a reduction gear 23 with a plurality of gears 24, 25 on a rack 26 which is connected to the pattern device 7.
  • the drive motor 22, however, is connected to the head piece 13.
  • the drive motor 22 may be formed, for example, as a stepper motor. When the drive motor 22 is actuated, the gears 24, 25 rotate and thus move the rack 26th
  • Fig. 4 shows a second embodiment of the correction drive 12.
  • the drive motor 22 rotates the spindle 27, the distance between the drive motor 22 and the spindle nut 28 changes.
  • a very sensitive adjustment can be made here.
  • Fig. 5 shows an embodiment of the further correction drive 18.
  • the offset slider 10 has a rotatably held spindle nut 29, with which a spindle 30 is engaged.
  • the spindle 30 is rotatably connected to a gear 32.
  • With the gear 32 is another gear 31 is engaged by a drive motor 33 can be driven.
  • the spindle 3 in turn is rotatably mounted on a part 34 of the offset slide 10, on which a roller 35 is arranged, which bears against the control surface 9.
  • the drive motors 22, 33 are, as indicated by an arrow, with the controller 17 in connection.
  • the control surface 9 can of course also be formed by a circumferential chain of cam members, if the offset movement 11 of the guide bar 5 requires this.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Description

Die Erfindung betrifft eine Kettenwirkmaschine mit einem Maschinenrahmen, mindestens einer Legebarre und einer Mustereinrichtung mit einer umlaufenden Steuerfläche, die die Legebarre in einer Versatzrichtung antreibt.The invention relates to a warp knitting machine with a machine frame, at least one guide bar and a pattern device with a circumferential control surface, which drives the guide bar in an offset direction.

Eine derartige Kettenwirkmaschine ist beispielsweise aus DE 195 04 467 C2 bekannt.Such a warp knitting machine is for example off DE 195 04 467 C2 known.

In einer Kettenwirkmaschine arbeiten Wirknadeln und Legenadeln zusammen, um eine Wirkware herzustellen. Die Wirknadeln sind dabei in der Regel an einer Wirknadelbarre angeordnet und die Legenadeln an einer Legenadelbarre. Die Legenadelbarre ist durch die Mustereinrichtung in Versatzrichtung verlagerbar, d.h. in die Richtung ihrer Längserstreckung. Darüber hinaus ist die Legebarre quer zur Versatzrichtung verschwenkbar. Bei dieser Verschwenkbewegung werden die Legenadeln durch Gassen zwischen den Wirknadeln geführt.In a warp knitting knitting needles and guide needles work together to produce a knitted fabric. The knitting needles are usually arranged on a knitting needle and the guide needles on a Garnadelbarre. The Garnadelbarre is through the pattern device in Displacement direction displaced, ie in the direction of its longitudinal extent. In addition, the guide bar is pivotable transversely to the offset direction. During this pivoting movement the guide needles are guided through alleys between the knitting needles.

Der Abstand zwischen benachbarten Legenadeln bzw. zwischen benachbarten Wirknadeln ist relativ klein. Er liegt vielfach in der Größenordnung 1 mm und kann durchaus auch kleiner als 1 mm sein. Die Legenadeln müssen also relativ zu den Wirknadeln mit einer hohen Genauigkeit bewegt werden können, um eine Kollision zwischen den Legenadeln und den Wirknadeln zu vermeiden.The distance between adjacent guide needles or between adjacent knitting needles is relatively small. It is often in the order of 1 mm and may well be less than 1 mm. The guide needles must therefore be able to be moved relative to the knitting needles with high accuracy in order to avoid a collision between the guide needles and the knitting needles.

Eine Kettenwirkmaschine ist vielfach Temperaturänderungen unterworfen. So entstehen durch verschiedene Einflüsse Temperaturunterschiede zwischen dem Maschinenstillstand und einer Produktionsphase. In erster Linie entstehen diese Temperaturunterschiede durch unterschiedliche Wärmeenergieabgaben der Maschine selbst, aber auch äußere Einflüsse, beispielsweise Temperaturunterschiede in der Maschinenumgebung oder eine direkte Sonneneinstrahlung, können die Temperatur der Kettenwirkmaschine ändern.A warp knitting machine is often subjected to temperature changes. As a result of different influences, temperature differences arise between machine downtime and a production phase. In the first place, these temperature differences arise due to different heat energy outputs of the machine itself, but also external influences, such as temperature differences in the machine environment or direct sunlight, can change the temperature of the warp knitting machine.

Eine Temperaturänderung hat bei vielen Elementen der Kettenwirkmaschine eine Längenänderung durch Wärmeausdehnung zur Folge. Eine derartige Wärmeausdehnung kann dazu führen, dass sich die Bewegungsbahn der Legenadeln relativ zu den Wirknadeln verändert. Dadurch kann es leicht zu Teilungsproblemen kommen, nämlich unerlaubt engen Abständen zwischen den Legenadeln und den Wirknadeln, die bis zu einer Kollision der Wirkwerkzeuge führen können.A change in temperature in many elements of the warp knitting machine results in a change in length due to thermal expansion. Such thermal expansion can cause the trajectory of the guide needles to change relative to the knitting needles. This can easily lead to division problems, namely unauthorized close intervals between the guide needles and the knitting needles, which can lead to a collision of knitting tools.

Man hat daher vielfach Versuche unternommen, die Kettenwirkmaschine insgesamt auf einer vorbestimmten Temperatur zu halten. So ist es beispielsweise aus DE 1 896 204 U1 bekannt, in einem mit Öl gefüllten Hauptwellengetriebegehäuse eine Heizeinrichtung mit einem Temperaturregler vorzusehen, so dass sich über die Wärmeausstrahlung des Öls im Hauptwellengetriebegehäuse eine Temperaturbeeinflussung der Wirkwerkzeugbarren ergibt.It has therefore often been attempts to keep the warp knitting machine at a total of a predetermined temperature. That's the way it is for example DE 1 896 204 U1 It is known to provide a heating device with a temperature controller in a main shaft gear housing filled with oil, so that a temperature influencing of the active tool bars results via the heat emission of the oil in the main shaft gear housing.

In der eingangs genannten DE 195 04 467 C2 wird vorgeschlagen, eine Ölversorgung in einem Hauptwellengetriebegehäuse und einen Ölumlauf im Bereich einer Mustereinrichtung sowie eine externe Temperiereinrichtung vorzusehen. Der Ölumlauf ist über die Temperiereinrichtung geführt, die mit der Ölversorgung im Hauptwellengetriebegehäuse derart gekoppelt ist, dass das Öl im Ölumlauf auf einem vorbestimmten Niveau gegenüber der von einem Öltemperaturregler bestimmten Öltemperatur in der Ölversorgung gehalten wird.In the aforementioned DE 195 04 467 C2 It is proposed to provide an oil supply in a main shaft gear housing and an oil circulation in the area of a pattern device as well as an external tempering device. The oil circulation is passed through the tempering, which is coupled to the oil supply in the main shaft gear housing such that the oil in the oil circulation is maintained at a predetermined level relative to the determined by an oil temperature controller oil temperature in the oil supply.

Man hat versucht, das Problem der Teilungsabweichung dadurch zu entschärfen, dass man Barren, insbesondere Legebarren, aus einem faserverstärkten Kunststoff bildet, der einen sehr kleinen Wärmeausdehnungskoeffizienten hat, so dass sich die Länge der Legebarre bei einer Temperaturänderung praktisch nicht ändert. Auch bei einer derartigen Lösung wird der Maschinenrahmen auf einer erhöhten Temperatur gehalten, die der Temperatur im Betrieb entspricht, weil die Kettenwirkmaschine immer noch Teile aufweist, deren Länge sich mit der Temperatur ändert.Attempts have been made to mitigate the problem of pitch deviation by forming ingots, particularly guide bars, from a fiber reinforced plastic which has a very low coefficient of thermal expansion so that the length of the guide bar does not change substantially with a change in temperature. Even with such a solution, the machine frame is maintained at an elevated temperature, which corresponds to the temperature during operation, because the warp knitting machine still has parts whose length changes with temperature.

Wenn die Kettenwirkmaschine auf einer erhöhten Temperatur gehalten wird, lassen sich zwar Teilungsprobleme weitgehend vermeiden. Es entstehen jedoch relativ hohe Kosten bei der Herstellung und im Betrieb der Kettenwirkmaschine, weil eine Heizeinrichtung vorgesehen und betrieben werden muss, wobei der Betrieb der Heizeinrichtung einen nicht unerheblichen Energieverbrauch zur Folge hat.If the warp knitting machine is kept at an elevated temperature, division problems can be largely avoided. However, there are relatively high costs in the production and operation of the warp knitting machine because a heater must be provided and operated, the operation of the heater has a significant energy consumption.

US 2 921 452 A zeigt eine Kettenwirkmaschine mit einer Legebarre und einer Mustereinrichtung mit einer umlaufenden Steuerfläche, die die Legebarre in einer Versatzrichtung antreibt. Zwischen der Legebarre und einem an der Steuerfläche anliegenden Stößel ist eine längenveränderbare Verbindung angeordnet. US 2,921,452 A shows a warp knitting machine with a guide bar and a pattern device with a rotating control surface which drives the guide bar in an offset direction. Between the guide bar and a voltage applied to the control surface ram a variable length connection is arranged.

DE 489 059 C zeigt ein Mustergetriebe für eine flache Kettenwirkmaschine, bei der eine Legebarre durch eine Mustereinrichtung mit einer umlaufenden Steuerfläche angetrieben ist. Zwischen der Mustereinrichtung und einem die Legebarre antreibenden Stößel ist ein Stufenteil angeordnet, mit dessen Hilfe ein Abstand zwischen dem Stößel und der Steuerfläche veränderbar ist. DE 489 059 C shows a pattern gear for a flat warp knitting machine, in which a guide bar is driven by a pattern device with a rotating control surface. Between the pattern device and the guide bar driving ram a step portion is arranged, with the aid of a distance between the plunger and the control surface is variable.

Der Erfindung liegt die Aufgabe zugrunde, auf kostengünstige Weise eine Teilungsabweichung der Legebarre, die auf Änderungen von Umgebungsbedingungen zurückzuführen ist, klein zu halten oder zu vermeiden.The invention has for its object to keep in a cost effective manner a pitch deviation of the guide bar, which is due to changes in environmental conditions, small or to avoid.

Diese Aufgabe wird bei einer Kettenwirkmaschine der eingangs genannten Art dadurch gelöst, dass die Mustereinrichtung durch einen Korrekturantrieb in Versatzrichtung verlagerbar ist.This object is achieved in a warp knitting machine of the type mentioned above in that the patterning device is displaced by a correction drive in the offset direction.

Die Mustereinrichtung ist an einem Ende des Maschinenrahmens angeordnet. Wenn sich also der Maschinenrahmen bei einer Temperaturerhöhung verlängert, wird die Mustereinrichtung verlagert. Auch wenn diese Verlagerung nur relativ gering ist, kann sie zu Teilungsproblemen führen. Dem wird nun dadurch entgegengewirkt, dass die Mustereinrichtung durch den Korrekturantrieb ganz oder teilweise verlagert wird, um die Wärmedehnung des Maschinenrahmens zu kompensieren. Diese Kompensationsbewegung ist dann eben- falls relativ klein, weil sie im Grunde nur die Wärmedehnung des Maschinenrahmens ausgleichen muss. Der Korrekturantrieb kann also die Mustereinrichtung in Versatzrichtung auf den Maschinenrahmen zu bewegen oder vom Maschinenrahmen weg. Hierbei kann die Mustereinrichtung als Ganzes verlagert werden.The pattern device is arranged at one end of the machine frame. So if the machine frame lengthens with a temperature increase, the pattern device is displaced. Even if this shift is relatively small, it can lead to division problems. This is counteracted by the fact that the pattern device is completely or partially displaced by the correction drive to compensate for the thermal expansion of the machine frame. This compensation movement is then just if relatively small, because they basically just have to compensate for the thermal expansion of the machine frame. The correction drive can thus move the pattern device in the offset direction on the machine frame or away from the machine frame. In this case, the pattern device can be displaced as a whole.

Vorzugsweise wirkt der Korrekturantrieb über ein Untersetzungsgetriebe auf die Mustereinrichtung. Damit ist es möglich, die Veränderung der Mustereinrichtung sehr genau zu steuern. Auch wenn der Korrekturantrieb, der beispielsweise als elektrischer Rotationsmotor oder als Schrittmotor ausgebildet sein kann, einen größeren Weg oder Drehwinkel zurücklegt, kann die auf die Mustereinrichtung wirkende Bewegung klein gehalten werden.Preferably, the correction drive acts on the pattern device via a reduction gear. This makes it possible to control the change of the pattern device very accurately. Even if the correction drive, which can be embodied, for example, as an electric rotary motor or as a stepping motor, covers a greater path or angle of rotation, the movement acting on the pattern device can be kept small.

Hierbei ist bevorzugt, dass der Korrekturantrieb über einen Spindeltrieb auf die Mustereinrichtung wirkt. Bei einem Spindeltrieb wirken zwei Elemente zusammen, die über eine Gewindepaarung miteinander verbunden sind. In Abhängigkeit von der Steigung der Gewindepaarung lässt sich dann eine lineare Bewegung mit sehr großer Untersetzung erzeugen.It is preferred that the correction drive acts on the pattern device via a spindle drive. In a spindle drive, two elements cooperate, which are connected to each other via a thread pairing. Depending on the pitch of the thread pairing, a linear movement with a very large reduction can then be generated.

Zusätzlich kann vorgesehen sein, dass der Korrekturantrieb die Länge eines Übertragungselements zwischen der Steuerfläche und der Legebarre verändert. Die Steuerfläche wird vielfach durch eine rotierende Scheibe gebildet, deren Umfang ein Profil aufweist, das die Bewegung der Legebarre steuert. Alternativ kann auch eine Musterkette vorgesehen werden, um die Versatzbewegung der Legebarre zu steuern. Zwischen der Legebarre und der Steuerfläche ist ein Übertragungselement, vielfach auch als "Versatzschieber" bezeichnet, vorgesehen. Wenn die Länge des Übertragungselements verändert wird, kann man auch dadurch die Wärmeausdehnung des Maschinenrahmens kompensieren.In addition, it can be provided that the correction drive changes the length of a transmission element between the control surface and the guide bar. The control surface is often replaced by a rotating Disc formed whose circumference has a profile that controls the movement of the guide bar. Alternatively, a pattern chain can be provided to control the offset movement of the guide bar. Between the guide bar and the control surface is a transmission element, often referred to as "offset slider" provided. If the length of the transmission element is changed, this also compensates for the thermal expansion of the machine frame.

Hierbei ist bevorzugt, dass das Übertragungselement mindestens zwei durch eine Gewindepaarung miteinander verbundene Abschnitte aufweist, die durch den Korrekturantrieb relativ zueinander verdrehbar sind. Wie oben erwähnt, ist die Änderung der Länge des Übertragungselements, die man zur Kompensation der Wärmeausdehnung des Maschinenrahmens benötigt, relativ klein, so dass sie durch ein Verdrehen von zwei Elementen bewirkt werden kann, die über eine Gewindepaarung miteinander verbunden sind.It is preferred that the transmission element has at least two sections connected to one another by a thread pairing, which sections can be rotated relative to one another by the correction drive. As mentioned above, the change in the length of the transfer element needed to compensate for the thermal expansion of the machine frame is relatively small, so that it can be effected by twisting two elements which are connected together by threading.

Vorzugsweise ist der Korrekturantrieb durch einen Regler gesteuert, der mit einer Sensoranordnung verbunden ist, die einen Einfluss mindestens einer Umgebungsbedingung auf den Maschinenrahmen ermittelt. Damit lässt sich die Korrektur, also die Kompensation der Wärmedehnung des Maschinenrahmens, automatisieren. Der Regler steuert den Korrekturantrieb so, dass die Wärmedehnung des Maschinenrahmens kompensiert wird.Preferably, the correction drive is controlled by a controller which is connected to a sensor arrangement which determines an influence of at least one environmental condition on the machine frame. This makes it possible to automate the correction, ie the compensation of the thermal expansion of the machine frame. The controller controls the correction drive so that the thermal expansion of the machine frame is compensated.

Hierbei ist bevorzugt, dass die Sensoranordnung einen Abstandssensor aufweist, der einen Abstand zwischen der Legebarre und einem der Mustereinrichtung zugeordneten Fixpunkt ermittelt und ein entsprechendes Ausgangssignal an den Regler ausgibt. Die Mustereinrichtung ist an einem Ende des Maschinenrahmens angeordnet. Wenn sich die Länge des Maschinenrahmens ändert, dann ändert sich die Position der Mustereinrichtung. Bei einer Legebarre aus einem Kunststoff ändert sich hingegen ihre Länge bei einer Temperaturänderung praktisch nicht. Man kann nun einen Ist-Abstand zwischen der Mustereinrichtung und der Legebarre ermitteln und diesen Ist-Abstand mit einem Soll-Wert vergleichen. Wenn sich dabei Unterschiede ergeben, wird der Korrekturantrieb in Betrieb genommen, um den Unterschied auf Null zu bringen.In this case, it is preferable for the sensor arrangement to have a distance sensor which determines a distance between the guide bar and a fixed point assigned to the pattern device and outputs a corresponding output signal to the controller. The pattern device is arranged at one end of the machine frame. As the length of the machine frame changes, the position of the pattern device changes. In a guide bar made of a plastic, however, their length practically does not change with a temperature change. One can now determine an actual distance between the pattern device and the guide bar and compare this actual distance with a desired value. If there are differences, the correction drive is put into operation to bring the difference to zero.

Hierbei ist bevorzugt, dass der Regler das Ausgangssignal an vorbestimmten Positionen der Steuerfläche auswertet. Wenn die Steuerfläche bewegt wird, dann erzeugt diese Bewegung eine Bewegung der Legebarre in Versatzrichtung. Damit ergibt sich ein Ausgangssignal des Abstandssensors, dass sich fortlaufend ändert. Man kann jedoch einen "Nullpunkt" bestimmen, an dem sich die Legebarre beispielsweise in einer Neutralstellung oder an einem vorbestimmten Umkehrpunkt befindet. Der Abstand zwischen der Legebarre und dem Fixpunkt sollte in diesem Nullpunkt oder Umkehrpunkt dem Soll-Wert entsprechen. Andernfalls ist eine Korrekturbewegung notwendig.It is preferred that the controller evaluates the output signal at predetermined positions of the control surface. When the control surface is moved, this movement creates a movement of the guide bar in the offset direction. This results in an output signal of the distance sensor that changes continuously. However, one can determine a "zero point" at which the guide bar is, for example, in a neutral position or at a predetermined reversal point. The distance between the guide bar and the fixed point should correspond to the setpoint value at this zero point or reversal point. Otherwise, a correction movement is necessary.

In einer Alternative kann vorgesehen sein, dass der Regler das Ausgangssignal kontinuierlich auswertet und mit einer Soll-Funktion vergleicht, die einer Steuerkurve der Steuerfläche entspricht. In diesem Fall hat der Regler die Information über die Bewegung der Legebarre in Versatzrichtung. Er kann fortlaufend oder in kleinen zeitlichen Abständen ermitteln, ob die Legebarre tatsächlich dieser Steuerkurve folgt oder ob sich ein Abstand überlagert hat. Sollte sich ein derartiger Abstand zeigen, kann der Korrekturantrieb in Betrieb genommen werden, um die Wärmeausdehnung des Maschinenrahmens zu kompensieren.In an alternative, it can be provided that the controller continuously evaluates the output signal and with a setpoint function corresponding to a control cam of the control surface compares. In this case, the controller has the information about the movement of the guide bar in the offset direction. It can continuously or at short intervals determine whether the guide bar actually follows this control curve or whether a distance has overlapped. Should such a distance be seen, the correction drive can be put into operation to compensate for the thermal expansion of the machine frame.

Alternativ oder zusätzlich kann vorgesehen sein, dass die Sensoranordnung einen Temperatursensor aufweist, der eine Temperatur des Maschinenrahmens ermittelt. Die Temperatur kann durchaus an verschiedenen Stellen des Maschinenrahmens ermittelt werden. Auch eine Temperaturermittlung an der Mustereinrichtung ist möglich. Aus der Temperatur des Maschinenrahmens kann man dann die Information über die Längenänderung des Maschinenrahmens gewinnen, aufgrund derer der Korrekturantrieb in Betrieb genommen wird, um die Wärmeausdehnung zu kompensieren.Alternatively or additionally, it can be provided that the sensor arrangement has a temperature sensor which determines a temperature of the machine frame. The temperature can certainly be determined at various points of the machine frame. A temperature determination on the pattern device is possible. From the temperature of the machine frame, one can then obtain the information about the change in length of the machine frame, due to which the correction drive is put into operation to compensate for the thermal expansion.

Hierbei ist bevorzugt, dass der Regler eine Temperatur-Positionsabweichung-Verhältniskurve aufweist und aus der Temperatur und der Temperatur-Positionsabweichung-Verhältniskurve einen Korrekturwert errechnet. Mit dem errechneten Wert kann der Regler dann den Korrekturantrieb ansteuern, um die Wärmeausdehnung des Maschinenrahmens zu kompensieren.Here, it is preferable that the controller has a temperature-position deviation ratio curve and calculates a correction value from the temperature and the temperature-position deviation ratio curve. With the calculated value, the controller can then control the correction drive to compensate for the thermal expansion of the machine frame.

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

Fig. 1
eine stark schematisierte Darstellung einer ersten Ausführungsform einer Kettenwirkmaschine,
Fig. 2
eine stark schematisierte Darstellung einer zweiten Ausführungsform einer Kettenwirkmaschine,
Fig. 3
eine erste Ausführungsform eines Korrekturantriebs gemäß Anspruch 1,
Fig. 4
eine zweite Ausführungsform eines Korrekturantriebs gemäß Anspruch 1 und
Fig. 5
eine Ausführungsform eines weiteren Korrekturantriebs gemäß Anspruch 4.
The invention will be described below with reference to preferred embodiments in conjunction with the drawing. Herein show:
Fig. 1
a highly schematic representation of a first embodiment of a warp knitting machine,
Fig. 2
a highly schematic representation of a second embodiment of a warp knitting machine,
Fig. 3
A first embodiment of a correction drive according to claim 1,
Fig. 4
A second embodiment of a correction drive according to claim 1 and
Fig. 5
an embodiment of a further correction drive according to claim 4.

Fig. 1 zeigt in stark schematisierter Form eine Kettenwirkmaschine 1 mit einem Maschinenrahmen 2, der eine Wirknadelbarre 3 trägt, an der nebeneinander Wirknadeln 4 angeordnet sind. Im Maschinenrahmen 2 ist eine nicht näher dargestellte Hauptwelle angeordnet, die die Wirknadelbarre 3, vereinfacht ausgedrückt, nach oben und nach unten bewegt. Fig. 1 shows in highly schematic form a warp knitting machine 1 with a machine frame 2, which carries a knitting needle bar 3, on the knitting needles 4 are arranged side by side. In the machine frame 2, a main shaft not shown is arranged, which moves the knitting needle 3, in simple terms, up and down.

Der Maschinenrahmen 2 trägt weiterhin eine Legebarre 5, an der Legenadeln 6 angeordnet sind. In an sich bekannter Weise wird die Legebarre 5 über die Hauptwelle so angetrieben, dass die Legenadeln 6 senkrecht zur Zeichenebene (bezogen auf die Darstellung der Fig. 1) verschwenkt werden. Dabei treten die Legenadeln 6 durch Gassen zwischen den Wirknadeln 4.The machine frame 2 also carries a guide bar 5, are arranged on the guide needles 6. In known per se Way, the guide bar 5 is driven via the main shaft so that the guide needles 6 perpendicular to the plane (based on the representation of Fig. 1 ) are pivoted. The guide needles 6 pass through streets between the knitting needles. 4

An einem Ende des Maschinenrahmens 2 ist eine Mustereinrichtung 7 angeordnet, die im vorliegenden Fall eine Nockenscheibe 8 aufweist. Die Nockenscheibe 8 weist an ihrem Umfang eine Steuerfläche 9 auf. An der Steuerfläche 9 liegt ein Versatzschieber 10 als Übertragungselement an, der über einen Stößel 11 auf die Legebarre 5 wirkt und die Legebarre 5 in eine so genannte Versatzrichtung antreibt. Die Versatzrichtung entspricht dabei der Längserstreckung der Legebarre 5. Die Legebarre 5 wird durch nicht näher dargestellte Rückstellmittel, beispielsweise Federn, in Richtung auf die Mustereinrichtung 7 belastet, so dass der Versatzschieber 10 immer an der Steuerfläche 9 anliegt.At one end of the machine frame 2, a pattern device 7 is arranged, which has a cam disk 8 in the present case. The cam disk 8 has a control surface 9 on its circumference. At the control surface 9 is an offset slider 10 as a transmission element, which acts on a plunger 11 on the guide bar 5 and drives the guide bar 5 in a so-called offset direction. The displacement direction corresponds to the longitudinal extent of the guide bar 5. The guide bar 5 is loaded by not shown return means, such as springs, in the direction of the pattern device 7, so that the offset slide 10 is always applied to the control surface 9.

Die Legebarre 5 und vielfach auch die Wirknadelbarre 3 sind aus einem faserverstärkten Kunststoff gebildet, also aus einem Material, das eine relativ geringe Wärmeausdehnung aufweist. Die Wärmeausdehnung von faserverstärkten Kunststoffen ist in der Praxis vernachlässigbar.The guide bar 5 and often the knitting needle bar 3 are formed from a fiber-reinforced plastic, that is, from a material having a relatively low thermal expansion. The thermal expansion of fiber reinforced plastics is negligible in practice.

Anders sieht es mit dem Maschinenrahmen 2 aus. Der Maschinenrahmen 2 ändert seine Länge mit der Temperatur. Wenn sich die Temperatur erhöht, wird der Maschinenrahmen 2 geringfügig länger. Diese Verlängerung des Maschinenrahmens 2 führt dazu, dass sich die Position der Mustereinrichtung 7 verändert und dementsprechend die Legebarre 5 auf andere Weise angesteuert wird. Die Versatzbewegung der Legebarre 5 hat dann geänderte Anfangs- und Endpunkte oder Umkehrpunkte.The situation is different with the machine frame 2. The machine frame 2 changes its length with the temperature. As the temperature increases, the machine frame 2 becomes slightly longer. This extension of the machine frame 2 causes the position of the pattern device 7 changed and accordingly the guide bar 5 is driven in a different way. The offset movement of the guide bar 5 then has changed start and end points or reversal points.

Dies kann zu Teilungsproblemen führen, nämlich zu unerlaubt engen Abständen zwischen den Legenadeln 6 und den Wirknadeln 4 oder sogar zu Kollisionen zwischen den Legenadeln 6 und den Wirknadeln 4.This can lead to division problems, namely unauthorized close distances between the guide needles 6 and the knitting needles 4 or even collisions between the guide needles 6 and the knitting needles. 4

Um derartige Probleme zu vermeiden, ist die Mustereinrichtung 7 mit einem Korrekturantrieb 12 versehen, der die Mustereinrichtung 7 relativ zum Maschinenrahmen 2 in Versatzrichtung verlagern kann. Damit wird die Position der Mustereinrichtung 7 insgesamt verändert. Wenn sich also der Maschinenrahmen 2 verlängert, dann wird die Mustereinrichtung 7 durch den Korrekturantrieb 12 um das Maß der Verlängerung in Richtung auf die Legebarre 5 bewegt, so dass die Bewegungsbahn der Legebarre 5 in Versatzrichtung wieder der gewünschten Bewegungsbahn entspricht, die durch die Steuerfläche 9 der Nockenscheibe 8 vorgegeben ist.In order to avoid such problems, the pattern device 7 is provided with a correction drive 12 which can displace the pattern device 7 relative to the machine frame 2 in the offset direction. Thus, the position of the pattern device 7 is changed as a whole. Thus, when the machine frame 2 is extended, the patterning device 7 is moved by the correction drive 12 by the amount of extension in the direction of the guide bar 5, so that the movement path of the guide bar 5 in the offset direction again corresponds to the desired trajectory, through the control surface. 9 the cam 8 is specified.

Der Korrekturantrieb 12 ist zwischen einem Kopfstück 13 des Maschinenrahmens 2 und der Mustereinrichtung 7 angeordnet. Zwischen dem Kopfstück 13 und der Mustereinrichtung 7 ist eine Gleitschienenanordnung 14 vorgesehen, auf der die Mustereinrichtung 7 gegenüber dem Kopfstück 13 gleiten kann, wenn der Korrekturantrieb 12 betätigt wird. Die Betätigung des Korrekturantriebs 12 kann manuell durch eine Bedienungsperson erfolgen.The correction drive 12 is arranged between a head piece 13 of the machine frame 2 and the pattern device 7. Between the header 13 and the pattern device 7, a slide rail assembly 14 is provided, on which the pattern device 7 can slide relative to the head piece 13 when the correction drive 12 is actuated. The actuation of the correction drive 12 can be done manually by an operator.

In vielen Fällen ist es aber günstig, die Korrektur der Position der Mustereinrichtung 7 automatisch zu bewirken. Hierzu ist ein Abstandssensor 15 vorgesehen, der an einem Ständer angeordnet ist, der einen Fixpunkt 16 bildet. Die Entfernung zwischen dem Fixpunkt 16 und der Mustereinrichtung 7 ist dabei so gering, dass eine mögliche Wärmedehnung des Maschinenrahmens 2 oder des Kopfstücks 13 keinen praktisch relevanten Einfluss auf eine Änderung der Position des Fixpunkts 16 relativ zur Mustereinrichtung 7 hat. Man kann also für die Praxis davon ausgehen, dass der Fixpunkt 16 der Mustereinrichtung 7 zugeordnet ist.In many cases, however, it is favorable to effect the correction of the position of the pattern device 7 automatically. For this purpose, a distance sensor 15 is provided, which is arranged on a stand which forms a fixed point 16. The distance between the fixed point 16 and the pattern device 7 is so small that a possible thermal expansion of the machine frame 2 or the head piece 13 has no practically relevant influence on a change in the position of the fixed point 16 relative to the pattern device 7. It can therefore be assumed for the practice that the fixed point 16 is assigned to the pattern device 7.

Der Abstandssensor 15 ist mit einem Regler 17 verbunden, der wiederum den Korrekturantrieb 7 ansteuert und in Abhängigkeit von einem Ausgangssignal des Abstandssensors 15 den Korrekturantrieb 12 betätigt.The distance sensor 15 is connected to a controller 17, which in turn drives the correction drive 7 and actuates the correction drive 12 in response to an output signal of the distance sensor 15.

Im Betrieb bewegt sich die Legebarre 5 unter dem Einfluss der Steuerfläche 9 hin und her. Um die Korrektur der Position der Mustereinrichtung 7 zu bewirken, gibt es verschiedene Möglichkeiten.In operation, the guide bar 5 moves under the influence of the control surface 9 back and forth. In order to effect the correction of the position of the pattern device 7, there are various possibilities.

Man kann zum einen den Abstand zwischen dem Fixpunkt 16 und der Legebarre 5 nur zu bestimmten Zeitpunkten messen, beispielsweise dann, wenn die Steuerfläche 9 die Legebarre 5 durch einen "Nullpunkt" fährt. Der Nullpunkt ist beispielsweise eine Position, an der die Legenadeln 6 durch Gassen zwischen den Wirknadeln 4 hindurchschwingen sollen. Wenn zu einem derartigen Zeitpunkt der mit dem Abstandssensor 15 gemessene Ist-Abstand nicht mit einem Soll-Abstand übereinstimmt, dann wird der Korrekturantrieb 12 betätigt, um den Ist-Abstand mit dem Soll-Abstand in Übereinstimmung zu bringen.On the one hand, it is only possible to measure the distance between the fixed point 16 and the guide bar 5 at certain times, for example, when the control surface 9 moves the guide bar 5 through a "zero point". The zero point is for example a position at which the guide needles. 6 should swing through alleys between the knitting needles 4. If, at such time, the actual distance measured by the distance sensor 15 does not coincide with a target distance, then the correction driver 12 is operated to make the actual distance coincident with the target distance.

Eine andere Möglichkeit besteht darin, dass der Abstandssensor 15 fortlaufend den Abstand zwischen dem Fixpunkt 16 und der Legebarre 5 ermittelt und an den Regler 17 meldet. Im Regler 17 ist die Soll-Positionskurve der Legebarre 5 gespeichert. Diese Soll-Positionskurve der Legebarre 5 wird durch die Steuerfläche 9 vorgegeben. Wenn die Ist-Positionskurve der Legebarre nicht mit der Soll-Positionskurve der Legebarre 5 übereinstimmt, dann wird der Korrekturantrieb 12 betätigt, um die Übereinstimmung wieder herzustellen. Da die Abweichung zwischen der Ist-Positionskurve und der Soll-Positionskurve lediglich in einem Versatz besteht, der durch die Wärmeausdehnung des Maschinenrahmens 2 bedingt ist, lässt sich die Übereinstimmung zwischen der Ist-Positionskurve und der Soll-Positionskurve der Legebarre 5 durch eine einfache Verlagerung der Mustereinrichtung 7 herstellen.Another possibility is that the distance sensor 15 continuously determines the distance between the fixed point 16 and the guide bar 5 and reports to the controller 17. In the controller 17, the desired position curve of the guide bar 5 is stored. This desired position curve of the guide bar 5 is predetermined by the control surface 9. If the actual position curve of the guide bar does not match the desired position curve of the guide bar 5, then the correction drive 12 is actuated to restore the match. Since the deviation between the actual positional curve and the desired positional curve consists only in an offset caused by the thermal expansion of the machine frame 2, the correspondence between the actual positional curve and the desired positional curve of the guide bar 5 can be achieved by a simple displacement make the pattern device 7.

Bei der soeben geschilderten Vorgehensweise wird die Position der Mustereinrichtung 7 insgesamt verändert, d.h. die Mustereinrichtung 7 wird durch den Korrekturantrieb 12 insgesamt verändert.In the just described approach, the position of the pattern means 7 is changed as a whole, i. the pattern device 7 is changed by the correction drive 12 as a whole.

Eine Alternative zur erfindungsgemäßen Verlagerung der Mustereinrichtung 7 besteht darin, dass man die Position der Mustereinrichtung 7 zwar insgesamt unverändert belässt, aber die Länge des Versatzschiebers 10 verändert. Die Änderung der Länge des Versatzschiebers 10 entspricht dabei der Wärmeausdehnung des Maschinenrahmens 2. Die Änderung der Länge des Versatzschiebers 10 wird durch einen weiteren Korrekturantrieb 18 bewirkt.An alternative to the displacement of the pattern device 7 according to the invention is that while leaving the position of the pattern device 7 as a whole unchanged, but the length of the offset slider 10 changed. The change in the length of the offset slider 10 corresponds to the thermal expansion of the machine frame 2. The change in the length of the offset slider 10 is effected by a further correction drive 18.

Selbstverständlich ist es auch möglich, sowohl die Position der Mustereinrichtung 7 zu verändern als auch die Länge des Versatzschiebers 10 zu verändern.Of course, it is also possible to change both the position of the pattern device 7 and to change the length of the offset slider 10.

Dargestellt ist, dass die Mustereinrichtung 7 sozusagen als Block verschoben werden kann. Diese Darstellung wurde aus Gründen der Übersicht gewählt. Es ist natürlich möglich, die Mustereinrichtung 7 insgesamt, d.h. mit ihrem gesamten Gehäuse, gegenüber dem Maschinenrahmen 2 zu verlagern. Es ist aber auch möglich, nur Teile der Mustereinrichtung 7, insbesondere die Nockenscheibe 8, in Versatzrichtung zu verlagern.It is shown that the pattern device 7 can be moved, so to speak, as a block. This presentation was chosen for clarity. It is, of course, possible for the pattern device 7 to be in total, i. with their entire housing, to shift relative to the machine frame 2. But it is also possible to shift only parts of the pattern device 7, in particular the cam 8, in the offset direction.

Fig. 2 zeigt in stark schematisierter Darstellung eine abgewandelte Ausführungsform einer Kettenwirkmaschine 1, bei der gleiche Elemente mit den gleichen Bezugszeichen versehen sind. Fig. 2 shows a highly schematic representation of a modified embodiment of a warp knitting machine 1, in which the same elements are provided with the same reference numerals.

Der Abstandssensor 5 ist durch mehrere Temperaturfühler 19-21 ersetzt, die die Temperaturen an verschiedenen Stellen des Maschinenrahmens 2 ermitteln. Aus den ermittelten Temperaturen und einer Temperatur-Positionsabweichung-Verhältniskurve berechnet der Regler 17 ständig einen Korrekturwert, mit dem der Korrekturantrieb 12 angesteuert werden kann, um die Wärmedehnung des Maschinenrahmens 2 zu kompensieren.The distance sensor 5 is replaced by a plurality of temperature sensors 19-21, which determine the temperatures at different locations of the machine frame 2. From the determined temperatures and a temperature position deviation ratio curve, the controller 17 constantly calculates a correction value with which the correction drive 12 can be controlled to compensate for the thermal expansion of the machine frame 2.

Fig. 3 zeigt eine mögliche Ausführungsform des Korrekturantriebs 12. Der Korrekturantrieb 12 weist einen Antriebsmotor 22 auf, der über ein Untersetzungsgetriebe 23 mit mehreren Zahnrädern 24, 25 auf eine Zahnstange 26 wirkt, die mit der Mustereinrichtung 7 verbunden ist. Der Antriebsmotor 22 ist hingegen mit dem Kopfstück 13 verbunden. Der Antriebsmotor 22 kann beispielsweise als Schrittmotor ausgebildet sein. Wenn der Antriebsmotor 22 betätigt wird, drehen sich die Zahnräder 24, 25 und verschieben damit die Zahnstange 26. Fig. 3 shows a possible embodiment of the correction drive 12. The correction drive 12 has a drive motor 22 which acts via a reduction gear 23 with a plurality of gears 24, 25 on a rack 26 which is connected to the pattern device 7. The drive motor 22, however, is connected to the head piece 13. The drive motor 22 may be formed, for example, as a stepper motor. When the drive motor 22 is actuated, the gears 24, 25 rotate and thus move the rack 26th

Fig. 4 zeigt eine zweite Ausführungsform des Korrekturantriebs 12. Der Motor 22, der wiederum am Kopfstück 13 befestigt ist, treibt eine Spindel 27 an, die mit einer Spindelmutter 28 in Eingriff steht, die an der Mustereinrichtung 7 befestigt ist. Wenn der Antriebsmotor 22 die Spindel 27 dreht, dann verändert sich der Abstand zwischen dem Antriebsmotor 22 und der Spindelmutter 28. In Abhängigkeit von der Steigung des Gewindes der Spindel 27 lässt sich hier eine sehr feinfühlige Einstellung vornehmen. Fig. 4 shows a second embodiment of the correction drive 12. The motor 22, which in turn is attached to the head piece 13, drives a spindle 27, which is in engagement with a spindle nut 28 which is fixed to the pattern device 7. When the drive motor 22 rotates the spindle 27, the distance between the drive motor 22 and the spindle nut 28 changes. Depending on the pitch of the thread of the spindle 27, a very sensitive adjustment can be made here.

Fig. 5 zeigt ein Ausführungsbeispiel für den weiteren Korrekturantrieb 18. Der Versatzschieber 10 weist eine drehfest gehaltene Spindelmutter 29 auf, mit der eine Spindel 30 in Eingriff steht. Die Spindel 30 ist drehfest mit einem Zahnrad 32 verbunden. Mit dem Zahnrad 32 steht ein weiteres Zahnrad 31 in Eingriff, das durch einen Antriebsmotor 33 angetrieben werden kann. Die Spindel 3 wiederum ist drehbar an einem Teil 34 des Versatzschiebers 10 gelagert, an dem eine Rolle 35 angeordnet ist, die an der Steuerfläche 9 anliegt. Die Antriebsmotoren 22, 33 stehen, wie dies durch einen Pfeil angedeutet ist, mit dem Regler 17 in Verbindung. Fig. 5 shows an embodiment of the further correction drive 18. The offset slider 10 has a rotatably held spindle nut 29, with which a spindle 30 is engaged. The spindle 30 is rotatably connected to a gear 32. With the gear 32 is another gear 31 is engaged by a drive motor 33 can be driven. The spindle 3 in turn is rotatably mounted on a part 34 of the offset slide 10, on which a roller 35 is arranged, which bears against the control surface 9. The drive motors 22, 33 are, as indicated by an arrow, with the controller 17 in connection.

Die Steuerfläche 9 kann natürlich auch durch eine umlaufende Kette aus Nockengliedern gebildet sein, wenn die Versatzbewegung 11 der Legebarre 5 dies erfordert.The control surface 9 can of course also be formed by a circumferential chain of cam members, if the offset movement 11 of the guide bar 5 requires this.

Mit Verwendung des Korrekturantriebs 12 ist es nicht mehr erforderlich, den Maschinenrahmen 2 ständig auf einer vorbestimmten erhöhten Temperatur zu halten. Da somit eine Beheizung entfallen kann, lässt sich eine erhebliche Menge an Energie einsparen.With the use of the correction drive 12, it is no longer necessary to keep the machine frame 2 constantly at a predetermined elevated temperature. Since a heating can be omitted, a considerable amount of energy can be saved.

Claims (11)

  1. Warp knitting machine (1) comprising a machine frame (2), at least one guide bar (5) and a pattern device (7) comprising a peripheral control surface (9) which drives the guide bar (5) in a displacement direction, characterised in that the pattern device (7) can be moved by a correction drive (12) in the displacement direction.
  2. Warp knitting machine according to claim 1, characterised in that the correction drive (12) acts via a step-down gear (23; 27, 28) on the pattern device (7).
  3. Warp knitting machine according to claim 2, characterised in that the correction drive (12) acts via a spindle drive (27, 28) on the pattern device (7).
  4. Warp knitting machine according to any of claims 1 to 3, characterised in that the length of a transfer element (10) between the control surface (9) and the guide bar (5) is altered by an additional correction drive (18).
  5. Warp knitting machine according to claim 4, characterised in that the transfer element (10) has at least two portions (29, 30), interconnected by a threaded mating, which are rotatable relative to each other by the additional correction drive (18).
  6. Warp knitting machine according to any of claims 1 to 5, characterised in that the correction drive (12, 18) is controlled by controller (17) connected to a sensor arrangement (15; 19-21) which detects an influence of at least one environmental condition on the machine frame (2).
  7. Warp knitting machine according to claim 6, characterised in that the sensor arrangement has a distance sensor (15) which detects a distance between the guide bar (5) and a fixed reference point (16) assigned to the pattern device (7) and outputs a corresponding output signal to the controller (17).
  8. Warp knitting machine according to claim 7, characterised in that the controller (17) interprets the output signal at predetermined positions on the control surface (9).
  9. Warp knitting machine according to claim 7, characterised in that the controller (17) continuously interprets the output signal and compares it to a target function corresponding to a control curve of the control face (9).
  10. Warp knitting machine according to any of claims 6 to 9, characterised in that the sensor arrangement has a temperature sensor (19-21) which detects a temperature of the machine frame (2).
  11. Warp knitting machine according to claim 10, characterised in that the controller (17) has a temperature to position deviation ratio curve and calculates a correction value from the temperature and from the temperature to position deviation ratio curve.
EP20120007543 2012-11-06 2012-11-06 Warp knitting machine Not-in-force EP2728045B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20120007543 EP2728045B1 (en) 2012-11-06 2012-11-06 Warp knitting machine
CN201310027829.6A CN103806215B (en) 2012-11-06 2013-01-25 Warp knitting machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20120007543 EP2728045B1 (en) 2012-11-06 2012-11-06 Warp knitting machine

Publications (2)

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EP2728045A1 EP2728045A1 (en) 2014-05-07
EP2728045B1 true EP2728045B1 (en) 2014-10-01

Family

ID=47191476

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20120007543 Not-in-force EP2728045B1 (en) 2012-11-06 2012-11-06 Warp knitting machine

Country Status (2)

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EP (1) EP2728045B1 (en)
CN (1) CN103806215B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3095904B1 (en) * 2015-05-21 2017-03-22 Karl Mayer Textilmaschinenfabrik GmbH Guide bar assembly for a warp knitting machine
CN109736007B (en) * 2019-03-12 2020-04-07 江南大学 Pattern loading control implementation method for high-speed double-needle-bar warp knitting machine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE489059C (en) * 1925-12-04 1930-01-11 Wilhelm Barfuss Pattern gear working with step wedge for flat warp knitting machines
US2921452A (en) * 1953-09-08 1960-01-19 Textile Machine Works Knitting machines and operating mechanism therefor
DE1896204U (en) 1960-02-08 1964-07-09 Mayer Fa Karl CHAIN MOLDING MACHINE WITH HEATED BARS.
US4086792A (en) * 1977-08-03 1978-05-02 Joan Manufacturing Corporation Weft inlay racking control
DE4303967C2 (en) * 1993-02-10 1995-03-30 Liba Maschf Warp knitting machine with individually movable thread guides attached to a bar
DE4411528C2 (en) * 1994-04-02 1997-06-26 Mayer Textilmaschf Warp knitting machine
DE19504467C2 (en) 1995-02-10 1997-07-24 Liba Maschf Warp knitting machine with a pattern device and an oil circulation

Also Published As

Publication number Publication date
CN103806215B (en) 2016-01-20
EP2728045A1 (en) 2014-05-07
CN103806215A (en) 2014-05-21

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