EP3095904B1 - Guide bar assembly for a warp knitting machine - Google Patents

Guide bar assembly for a warp knitting machine Download PDF

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Publication number
EP3095904B1
EP3095904B1 EP15168573.2A EP15168573A EP3095904B1 EP 3095904 B1 EP3095904 B1 EP 3095904B1 EP 15168573 A EP15168573 A EP 15168573A EP 3095904 B1 EP3095904 B1 EP 3095904B1
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EP
European Patent Office
Prior art keywords
guide bar
drive
pattern
return
bar assembly
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EP15168573.2A
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German (de)
French (fr)
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EP3095904A1 (en
Inventor
Rainer Kemper
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Karl Mayer Textilmaschinenfabrik GmbH
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Karl Mayer Textilmaschinenfabrik GmbH
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Priority to EP15168573.2A priority Critical patent/EP3095904B1/en
Priority to CN201610032997.8A priority patent/CN106167955B/en
Publication of EP3095904A1 publication Critical patent/EP3095904A1/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 present invention relates to a guide bar arrangement of a warp knitting machine, which has at least one guide bar, an offset drive acting on the guide bar in a single drive direction and a return arrangement acting counter to the drive direction, the return arrangement having a return drive.
  • Such a guide bar arrangement is made DE 399 487 C known.
  • a drive is arranged in each case, which has an eccentric, which acts via a double-armed lever on one end of the guide bar.
  • the eccentrics are driven by a common drive shaft via helical gears and worm wheels.
  • the warp threads are guided around knitting needles using guide needles, which are also referred to as punch needles, or other thread guides.
  • the guide needles are arranged on the guide bar.
  • the guide needles arranged on a guide bar must all be the same to be moved.
  • the movement of the guide bar in the direction of its longitudinal extension is effected by the so-called offset drive.
  • the offset drive can, for example, have a pattern disk or a pattern chain against which a pattern ram operatively connected to the guide bar rests.
  • the pattern plunger is held by the return assembly on the pattern disk or pattern chain.
  • the Drive device acts in this case only in a single direction on the guide bar, namely on pressure or shock.
  • the return assembly accordingly acts in the opposite direction.
  • the return assembly is usually provided with a spring system that applies the return force to the guide bar.
  • the spring system must be biased very high in order to maintain the adhesion between the guide bar, the pattern tappet and the pattern disc or the pattern chain.
  • These mass forces add up to the force of the spring system, so that the sample tappet is extremely high load.
  • these forces vary greatly, so there is a risk of elastic deformation of the elements involved and thus the positioning accuracy is impaired.
  • the guide bar During maintenance or set-up work, the guide bar must be moved from a working position to a maintenance position. For this purpose, the spring system must be separated from the guide bar. At a high bias of the spring system, this work requires a very high effort on the part of the operator.
  • An alternative solution is to use a pattern disk having a groove in which a roller of the pattern tappet is guided.
  • the groove has a shape that determines the path of the pattern tappet and thus the movement of the guide bar.
  • forces can be transmitted in both directions parallel to the longitudinal extent of the guide bar.
  • this solution has the disadvantage that the radial inner curve and the radial outer curve of the groove due to manufacturing tolerances are economically not so accurate to produce that over a revolution of the pattern disk uniform play and a uniform bias of the cam roller is adjustable to the sample disc.
  • a comparable arrangement is off CN 102 260 958 B known.
  • the rollers are attached to a common bracket.
  • the guide bar is driven in two directions.
  • DE 100 35 160 A1 shows a warp knitting machine with at least one bar, which is displaceable by a controllable motor in both directions. At the bar ends each engage a clamping element, wherein the clamping forces of the two clamping elements are opposite in size equal. In this way, the clamping forces are in balance and the engine can put the bar with relatively small forces, no matter in which direction.
  • EP 2 728 045 A1 shows a warp knitting machine with a pattern device that drives a guide bar.
  • the pattern device can be changed by a correction drive in the offset direction.
  • the guide bar can be loaded by springs in the direction of the pattern device.
  • the invention has for its object to make a high operating speed compatible with high accuracy.
  • the return drive now controls the movement of the guide bar in a direction that is directed opposite to the drive direction.
  • a transmission element for example, the above-mentioned plunger
  • the offset drive such as the sample disc or chain
  • the return movement is now controlled, so that over the movement stroke of the guide bar no changing spring forces or the like can arise.
  • the guide bar can be relatively uniformly loaded during its return movement, ie the movement against the drive direction, so that the risk of vibrations is kept small. Maintenance is simplified because the return assembly is much simpler.
  • the connecting element can be formed for example by a cable. This one is freer in the design of the return assembly.
  • the return drive acts on the guide bar via a spring.
  • the spring ensures that the guide bar, possibly via a connecting element, such as the above-mentioned sample ram, always in play-free engagement with the
  • the return drive is driven synchronously with the offset drive. This makes it possible to adjust the movement of the guide bar in the drive direction and the movement of the guide bar opposite to the drive direction very precisely.
  • the above-mentioned synchronous operation of return drive and offset drive can be achieved.
  • the return drive has a sensing element, which bears against the second peripheral surface, wherein the sensing element is connected to a deflection lever which is pivotable about a pivot point and the guide bar is connected at a position with the reversing lever, which is arranged on the side facing away from the scanning element of the pivot point.
  • the reversing lever is thus designed as a two-armed lever.
  • the scanning element engages at one end and the guide bar at the other end.
  • the movement of the deflection roller is inverted, so to speak.
  • the first peripheral surface and the second peripheral surface each have a plurality of reports and the scanning element is offset by at least one repeat relative to the pattern tappet.
  • a report contains all the information necessary to move the guide bar into a pattern section. If such a pattern section is not too long, then you can quite accommodate several repeats on the peripheral surfaces.
  • the offset of the points of application of the scanning element and the tappet makes it possible to decouple the spatial arrangement of the scanning element and the tappet.
  • the cam element and the pattern element are arranged on a common drive axle. If the cam element and the pattern element are each designed as a cam disk or pattern disk, then the drive axle can form a common axis of rotation. This is a very simple way to achieve the synchronous movement of the first peripheral surface and the second peripheral surface.
  • the curve element and the pattern element are identical. Accordingly, then the first peripheral surface and the second peripheral surface are identical. The scanning element and the sample ram are then located on the the same area, wherein they are expediently offset in the circumferential direction of the peripheral surface relative to each other.
  • the offset drive act solely on pressure on the guide bar and the return drive exclusively to train on the guide bar. This makes it possible to achieve a very precise control of the movement of the guide bar.
  • a guide bar arrangement according to Fig. 1 has a guide bar 2, which can also be referred to as a guide bar, on.
  • a guide bar 2 which can also be referred to as a guide bar, on.
  • more thread guide 3 are fixed, which are formed for example as a punch needles or guide needles.
  • the guide bar is driven back and forth in operation, as shown by a double arrow 4.
  • the double arrow 4 indicates a direction parallel to the longitudinal extension of the guide bar.
  • the guide bar 2 is also moved perpendicular to the plane in a stitch-forming process. However, this will not be explained further in the present case.
  • the guide bar assembly 1 has an offset drive.
  • the offset drive has a pattern element 5 in the form of a pattern disk with a first peripheral surface 6.
  • the pattern element 5 is rotated by a drive motor 7. Instead of a pattern disk you can also use a pattern chain.
  • a pattern tappet 8 abuts with a roller 9 on the first peripheral surface 6 of the pattern element 5.
  • the first peripheral surface 6 has circumferentially different distances to a rotation axis 10 of the pattern element 5. Accordingly, the pattern plunger 8 is pushed away from the rotation axis 10 when the peripheral surface has a greater distance from the axis of rotation 10.
  • the direction away from the axis of rotation 10 is also referred to below as the "drive direction".
  • the offset drive thus acts only in the drive direction on the guide bar 2, ie in a single direction.
  • a return assembly is provided in order to hold the roller 5 in abutment with the first peripheral surface 6.
  • the return assembly acts counter to the drive direction on the guide bar 2. Accordingly, the roller 9 is always held in contact with the first peripheral surface 6.
  • the roller 9 of the contour of the first peripheral surface 6 follow very accurately and without play, so that equally accurate control of the movement of the guide bar 2 in the direction of the double arrow 4 is possible, ie parallel to its longitudinal extent.
  • the return arrangement has a return drive, which has a cam element 11 in the present case.
  • the cam element 11 has a second peripheral surface 12.
  • the cam member 11 may, like the pattern member 5, be formed as a cam.
  • the cam element 11 is on the same axis of rotation 10 as the cam element 5 arranged and is driven by the same drive motor 7.
  • the cam member 11 rotates synchronously with the pattern member 5, and the first peripheral surface 6 and the second peripheral surface 12 rotate in synchronism with each other.
  • the reversing lever 14 is pivotable about a pivot point 15.
  • the reversing lever 14 has a first lever arm 16, which connects the pivot point 15 with the sensing element 13, and a second lever arm 17 which connects the pivot point 15 with a cable section 18.
  • the cable section 18 is connected via a spring 19 and a second cable section 20 with the guide bar 2.
  • the spring 19 is under a small bias, so that over the reversing lever 14, the sensing element 13 is permanently held in contact with the second peripheral surface 12.
  • the second peripheral surface 12 is designed so that the spring 19 is tensioned more when counteracting inertial forces from the displacement movement of the force of the spring 19 and the Force of the spring 19 is reduced when the mass forces in the same direction as the force of the spring 19 acts.
  • the force acting on the pattern tappet 8 between the pattern element 5 and the guide bar 2 can ideally be kept constant during normal operation. Alternating elastic deformations between the pattern element 5 and the guide bar 2 are avoided and the pitch accuracy can be maintained very precisely.
  • Fig. 2 shows a simplified embodiment in which the pattern element 5 and the cam element 11 are identical. Accordingly, the first peripheral surface 6 and the second peripheral surface 12 are identical.
  • the first peripheral surface 6 and the second peripheral surface 12, which are identical in the present case, are formed so that the movement of the sensing element 13 and the movement 9 are of opposite configuration. This can also be done by providing a plurality of reports on the first peripheral surface 6 and the second peripheral surface 12 and the position of the roller 9 and the scanning element 13 is offset by one or more reports or parts of the reports.
  • the embodiments according to the Fig. 1 and 2 require a rigid guide bar 2, so a guide bar that can be loaded with pressure or shock without deforming.

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

Description

Die vorliegende Erfindung betrifft eine Legebarrenanordnung einer Kettenwirkmaschine, die mindestens eine Legebarre, einen auf die Legebarre in eine einzige Antriebsrichtung wirkenden Versatzantrieb und eine entgegengesetzt zu der Antriebsrichtung wirkende Rückholanordnung aufweist, wobei die Rückholanordnung einen Rückholantrieb aufweist.The present invention relates to a guide bar arrangement of a warp knitting machine, which has at least one guide bar, an offset drive acting on the guide bar in a single drive direction and a return arrangement acting counter to the drive direction, the return arrangement having a return drive.

Eine derartige Legebarrenanordnung ist aus DE 399 487 C bekannt. An beiden Enden einer Legebarre ist jeweils ein Antrieb angeordnet, der einen Exzenter aufweist, der über einen doppelarmigen Hebel auf ein Ende der Legebarre wirkt. Die Exzenter werden von einer gemeinsamen Antriebswelle über Schraubenräder und Schneckenräder angetrieben.Such a guide bar arrangement is made DE 399 487 C known. At each end of a guide bar, a drive is arranged in each case, which has an eccentric, which acts via a double-armed lever on one end of the guide bar. The eccentrics are driven by a common drive shaft via helical gears and worm wheels.

Zum Herstellen einer Wirkware müssen Maschen gebildet werden. Zur Maschenbildung werden die Kettfäden mit Hilfe von Legenadeln, die auch als Lochnadeln bezeichnet werden, oder anderen Fadenführern um Wirknadeln herumgeführt. Die Legenadeln sind dabei an der Legebarre angeordnet. Die an einer Legebarre angeordneten Legenadeln müssen alle gleichartig bewegt werden. Die Bewegung der Legebarre in Richtung ihrer Längserstreckung wird durch den so genannten Versatzantrieb bewirkt. Der Versatzantrieb kann beispielsweise eine Musterscheibe oder eine Musterkette aufweisen, an der ein mit der Legebarre in Wirkverbindung stehender Musterstößel anliegt. Der Musterstößel wird durch die Rückholanordnung an der Musterscheibe oder der Musterkette gehalten. Die Antriebseinrichtung wirkt in diesem Fall nur in eine einzige Richtung auf die Legebarre, nämlich auf Druck oder Stoß. Die Rückholanordnung wirkt dementsprechend in die entgegengesetzte Richtung.To produce a knitted fabric mesh must be formed. To form a loop, the warp threads are guided around knitting needles using guide needles, which are also referred to as punch needles, or other thread guides. The guide needles are arranged on the guide bar. The guide needles arranged on a guide bar must all be the same to be moved. The movement of the guide bar in the direction of its longitudinal extension is effected by the so-called offset drive. The offset drive can, for example, have a pattern disk or a pattern chain against which a pattern ram operatively connected to the guide bar rests. The pattern plunger is held by the return assembly on the pattern disk or pattern chain. The Drive device acts in this case only in a single direction on the guide bar, namely on pressure or shock. The return assembly accordingly acts in the opposite direction.

Die Rückholanordnung ist in der Regel mit einem Federsystem versehen, das die Rückholkraft auf die Legebarre aufbringt. Bei hohen Massenkräften, die durch den Versatz der Legebarre hervorgerufen werden, muss das Federsystem allerdings sehr hoch vorgespannt werden, um den Kraftschluss zwischen der Legeschiene, dem Musterstößel und der Musterscheibe oder der Musterkette aufrechtzuerhalten. Diese Massenkräfte addieren sich zu der Kraft des Federsystems, so dass der Musterstößel extrem hoch belastet wird. Darüber hinaus variieren diese Kräfte sehr stark, so dass die Gefahr von elastischen Verformungen der beteiligten Elemente besteht und damit die Positioniergenauigkeit beeinträchtigt wird.The return assembly is usually provided with a spring system that applies the return force to the guide bar. At high mass forces, however, caused by the misalignment of the guide bar, the spring system must be biased very high in order to maintain the adhesion between the guide bar, the pattern tappet and the pattern disc or the pattern chain. These mass forces add up to the force of the spring system, so that the sample tappet is extremely high load. In addition, these forces vary greatly, so there is a risk of elastic deformation of the elements involved and thus the positioning accuracy is impaired.

Bei Wartungs- oder Einrichtarbeiten muss die Legebarre aus einer Arbeitsposition in eine Wartungsposition gebracht werden. Hierzu muss das Federsystem von der Legebarre getrennt werden. Bei einer hohen Vorspannung des Federsystems erfordert diese Arbeit einen sehr hohen Kraftaufwand seitens des Bedienpersonals.During maintenance or set-up work, the guide bar must be moved from a working position to a maintenance position. For this purpose, the spring system must be separated from the guide bar. At a high bias of the spring system, this work requires a very high effort on the part of the operator.

Um bei schnell laufenden Kettenwirkmaschinen die den Massenkräften, die aus der Beschleunigung der Legebarre herrühren, adäquaten Rückholkräfte aufzubringen, werden üblicherweise Federsysteme mit hoher Federkonstante eingesetzt. Dies führt bei großen Versatzwegen zu einem enormen Anstieg der Federkräfte und zu einer Verschlechterung der Teilungsgenauigkeit aufgrund elastischer Verformungen zwischen der Legebarre und dem Versatzantrieb.In order to apply adequate return forces to the mass forces resulting from the acceleration of the guide bar in fast-running warp knitting machines, spring systems with a high spring constant are usually used. This leads to a huge increase in the spring forces and a deterioration of the pitch accuracy due to elastic deformation between the guide bar and the offset drive at large displacement paths.

Eine alternative Lösung besteht darin, eine Musterscheibe zu verwenden, die eine Nut aufweist, in der eine Rolle des Musterstößels geführt ist. Die Nut hat dabei eine Form, die den Weg des Musterstößels und damit die Bewegung der Legebarre bestimmt. Hier können Kräfte in beide Richtungen parallel zur Längserstreckung der Legebarre übertragen werden. Allerdings hat diese Lösung den Nachteil, dass die radiale Innenkurve und die radiale Außenkurve der Nut aufgrund von Fertigungstoleranzen wirtschaftlich nicht so exakt herstellbar sind, dass über eine Umdrehung der Musterscheibe ein gleichmäßiges Spiel bzw. eine gleichmäßige Vorspannung der Kurvenrolle zur Musterscheibe einstellbar ist.An alternative solution is to use a pattern disk having a groove in which a roller of the pattern tappet is guided. The groove has a shape that determines the path of the pattern tappet and thus the movement of the guide bar. Here forces can be transmitted in both directions parallel to the longitudinal extent of the guide bar. However, this solution has the disadvantage that the radial inner curve and the radial outer curve of the groove due to manufacturing tolerances are economically not so accurate to produce that over a revolution of the pattern disk uniform play and a uniform bias of the cam roller is adjustable to the sample disc.

Eine vergleichbare Anordnung ist aus CN 102 260 958 B bekannt. Hier weist die Kurvenscheibe einen umlaufenden Vorsprung auf, an dem jeweils radial außen und radial innen eine Rolle anliegt. Die Rollen sind an einer gemeinsamen Halterung befestigt. Dadurch wird die Legebarre in zwei Richtungen angetrieben. Allerdings hat man auch hier das Problem von Fertigungstoleranzen.A comparable arrangement is off CN 102 260 958 B known. Here, the cam on a circumferential projection on which bears radially in each case radially outward and radially inside a roller. The rollers are attached to a common bracket. As a result, the guide bar is driven in two directions. However, one also has the problem of manufacturing tolerances here.

DE 100 35 160 A1 zeigt eine Kettenwirkmaschine mit mindestens einer Barre, die durch einen steuerbaren Motor in beide Richtungen versetzbar ist. An den Barrenenden greift je ein Spannelement an, wobei die Spannkräfte der beiden Spannelemente entgegengesetzt gleich groß sind. Auf diese Weise stehen die Spannkräfte im Gleichgewicht und der Motor kann die Barre mit verhältnismäßig geringen Kräften versetzen, gleichgültig in welche Richtung. DE 100 35 160 A1 shows a warp knitting machine with at least one bar, which is displaceable by a controllable motor in both directions. At the bar ends each engage a clamping element, wherein the clamping forces of the two clamping elements are opposite in size equal. In this way, the clamping forces are in balance and the engine can put the bar with relatively small forces, no matter in which direction.

EP 2 728 045 A1 zeigt eine Kettenwirkmaschine mit einer Mustereinrichtung, die eine Legebarre antreibt. Die Mustereinrichtung ist durch einen Korrekturantrieb in Versatzrichtung veränderbar. Die Legebarre kann durch Federn in Richtung auf die Mustereinrichtung belastet werden. EP 2 728 045 A1 shows a warp knitting machine with a pattern device that drives a guide bar. The pattern device can be changed by a correction drive in the offset direction. The guide bar can be loaded by springs in the direction of the pattern device.

Der Erfindung liegt die Aufgabe zugrunde, eine hohe Arbeitsgeschwindigkeit mit einer hohen Genauigkeit vereinbar zu machen.The invention has for its object to make a high operating speed compatible with high accuracy.

Diese Aufgabe wird bei einer Legebarrenanordnung der eingangs genannten Art dadurch gelöst, dass der Rückholantrieb über eine Feder auf die Legebarre wirkt, die in einem Verbindungselement zwischen der Legebarre und dem Rückholantrieb angeordnet ist.This object is achieved in a guide bar assembly of the type mentioned above in that the return drive acts via a spring on the guide bar, which is arranged in a connecting element between the guide bar and the return drive.

Der Rückholantrieb steuert nun die Bewegung der Legebarre in eine Richtung, die der Antriebsrichtung entgegengesetzt gerichtet ist. Damit ist es möglich, die Legebarre über ein Übertragungselement, beispielsweise den oben genannten Musterstößel, permanent in einem spielfreien Eingriff mit dem Versatzantrieb, z.B. der Musterscheibe oder -kette, zu halten, so dass die Bewegung der Legebarre sehr genau gesteuert werden kann und zwar unabhängig von der Arbeitsgeschwindigkeit der Kettenwirkmaschine. Auch die Rückbewegung erfolgt nun gesteuert, so dass sich über den Bewegungshub der Legebarre keine sich ändernden Federkräfte oder dergleichen ergeben können. Die Legebarre kann bei ihrer Rückbewegung, also der Bewegung entgegen der Antriebsrichtung, relativ gleichmäßig belastet werden, so dass auch die Gefahr von Schwingungen klein gehalten wird. Die Wartung wird vereinfacht, weil die Rückholanordnung wesentlich einfacher ausgebildet ist. Das Verbindungselement kann beispielsweise durch einen Seilzug gebildet sein. Damit ist man in der Ausgestaltung der Rückholanordnung freier.The return drive now controls the movement of the guide bar in a direction that is directed opposite to the drive direction. This makes it possible, the guide bar via a transmission element, for example, the above-mentioned plunger, permanently in a play-free engagement with the offset drive, such as the sample disc or chain to keep, so that the movement of the guide bar can be controlled very accurately and that independently from the working speed of the warp knitting machine. The return movement is now controlled, so that over the movement stroke of the guide bar no changing spring forces or the like can arise. The guide bar can be relatively uniformly loaded during its return movement, ie the movement against the drive direction, so that the risk of vibrations is kept small. Maintenance is simplified because the return assembly is much simpler. The connecting element can be formed for example by a cable. This one is freer in the design of the return assembly.

Der Rückholantrieb wirkt über eine Feder auf die Legebarre. Die Feder sorgt dafür, dass die Legebarre, gegebenenfalls über ein Verbindungselement, wie den oben genannten Musterstößel, immer im spielfreien Eingriff mit demThe return drive acts on the guide bar via a spring. The spring ensures that the guide bar, possibly via a connecting element, such as the above-mentioned sample ram, always in play-free engagement with the

Versatzantrieb steht. Da sie aber mit der Rückholanordnung mitbewegt wird, ergeben sich allenfalls kleine Längenänderungen der Feder und damit kleine Kraftänderungen. Dementsprechend bleiben die auf die Legebarre und die damit zusammenwirkenden Teile der Legebarrenanordnung wirkenden Kräfte während eines kompletten Bewegungszyklus der Legebarre im Wesentlichen gleich.Offset drive stands. However, since it is moved along with the return arrangement, at most small changes in length of the spring and thus small force changes result. Accordingly, the forces acting on the guide bar and the cooperating parts of the guide bar assembly remain substantially the same during a complete cycle of movement of the guide bar.

Vorzugsweise ist der Rückholantrieb synchron mit dem Versatzantrieb angesteuert. Damit ist es möglich, die Bewegung der Legebarre in Antriebsrichtung und die Bewegung der Legebarre entgegen der Antriebsrichtung sehr genau aneinander anzupassen.Preferably, the return drive is driven synchronously with the offset drive. This makes it possible to adjust the movement of the guide bar in the drive direction and the movement of the guide bar opposite to the drive direction very precisely.

Bevorzugterweise weist der Rückholantrieb ein Kurvenelement mit einer zweiten umlaufenden Umfangsfläche und der Versatzantrieb ein Musterelement mit einer ersten umlaufenden Umfangsfläche auf, die auf einen Musterstößel wirkt, wobei die Umfangsflächen synchron miteinander umlaufen. Damit lässt sich die oben erwähnte synchrone Betriebsweise von Rückholantrieb und Versatzantrieb erreichen.Preferably, the return drive on a cam member having a second circumferential peripheral surface and the offset drive on a pattern member having a first circumferential peripheral surface which acts on a pattern tappet, wherein the circumferential surfaces rotate synchronously with each other. Thus, the above-mentioned synchronous operation of return drive and offset drive can be achieved.

Vorzugsweise weist der Rückholantrieb ein Abtastelement auf, das an der zweiten Umfangsfläche anliegt, wobei das Abtastelement mit einem Umlenkhebel verbunden ist, der um einen Schwenkpunkt verschwenkbar ist und die Legebarre an einer Position mit dem Umlenkhebel verbunden ist, der auf der dem Abtastelement abgewandten Seite des Schwenkpunkts angeordnet ist. Der Umlenkhebel ist also als zweiarmiger Hebel ausgebildet. An einem Ende greift das Abtastelement an und am anderen Ende die Legebarre. Damit wird die Bewegung der Umlenkrolle sozusagen invertiert.Preferably, the return drive has a sensing element, which bears against the second peripheral surface, wherein the sensing element is connected to a deflection lever which is pivotable about a pivot point and the guide bar is connected at a position with the reversing lever, which is arranged on the side facing away from the scanning element of the pivot point. The reversing lever is thus designed as a two-armed lever. The scanning element engages at one end and the guide bar at the other end. Thus, the movement of the deflection roller is inverted, so to speak.

Wenn die zweite Umfangsfläche das Abtastelement radial nach außen führt, ergibt sich eine Zugbewegung auf die Legebarre.When the second peripheral surface guides the scanning element radially outwards, a pulling movement results on the guide bar.

Vorzugsweise weisen die erste Umfangsfläche und die zweite Umfangsfläche jeweils mehrere Rapporte auf und das Abtastelement ist um mindestens einen Rapport relativ zum Musterstößel versetzt. Ein Rapport beinhaltet sämtliche Informationen, die zum Bewegen der Legebarre in einen Musterungsabschnitt notwendig ist. Wenn ein derartiger Musterungsabschnitt nicht allzu lang ist, dann kann man durchaus mehrere Rapporte auf den Umfangsflächen unterbringen. Der Versatz der Angriffspunkte von Abtastelement und Musterstößel gibt die Möglichkeit, die räumliche Anordnung von Abtastelement und Musterstößel etwas zu entkoppeln. Hierbei ist bevorzugt, dass das Kurvenelement und das Musterelement auf einer gemeinsamen Antriebsachse angeordnet sind. Wenn das Kurvenelement und das Musterelement jeweils als Kurvenscheibe bzw. Musterscheibe ausgebildet sind, dann kann die Antriebsachse eine gemeinsame Drehachse bilden. Dies ist eine sehr einfache Möglichkeit, um die synchrone Bewegung von erster Umfangsfläche und zweiter Umfangsfläche zu erreichen.Preferably, the first peripheral surface and the second peripheral surface each have a plurality of reports and the scanning element is offset by at least one repeat relative to the pattern tappet. A report contains all the information necessary to move the guide bar into a pattern section. If such a pattern section is not too long, then you can quite accommodate several repeats on the peripheral surfaces. The offset of the points of application of the scanning element and the tappet makes it possible to decouple the spatial arrangement of the scanning element and the tappet. It is preferred that the cam element and the pattern element are arranged on a common drive axle. If the cam element and the pattern element are each designed as a cam disk or pattern disk, then the drive axle can form a common axis of rotation. This is a very simple way to achieve the synchronous movement of the first peripheral surface and the second peripheral surface.

In einer besonders bevorzugten Ausgestaltung ist vorgesehen, dass das Kurvenelement und das Musterelement identisch sind. Dementsprechend sind dann auch die erste Umfangsfläche und die zweite Umfangsfläche identisch. Das Abtastelement und der Musterstößel liegen dann an der gleichen Fläche an, wobei sie zweckmäßigerweise in Umlaufrichtung der Umfangsfläche relativ zueinander versetzt sind.In a particularly preferred embodiment, it is provided that the curve element and the pattern element are identical. Accordingly, then the first peripheral surface and the second peripheral surface are identical. The scanning element and the sample ram are then located on the the same area, wherein they are expediently offset in the circumferential direction of the peripheral surface relative to each other.

Vorzugsweise wirken der Versatzantrieb ausschließlich auf Druck auf die Legebarre und der Rückholantrieb ausschließlich auf Zug auf die Legebarre. Damit lässt sich eine sehr genaue Steuerung der Bewegung der Legebarre erreichen.Preferably, the offset drive act solely on pressure on the guide bar and the return drive exclusively to train on the guide bar. This makes it possible to achieve a very precise control of the movement of the guide bar.

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

Fig. 1
eine schematische Darstellung einer Legebarrenanordnung und
Fig. 2
eine schematische Darstellung einer vereinfachten Ausführungsform einer Legebarrenanordnung.
The invention will be described below with reference to preferred embodiments in conjunction with the drawing. Herein show:
Fig. 1
a schematic representation of a guide bar assembly and
Fig. 2
a schematic representation of a simplified embodiment of a guide bar assembly.

Gleiche und einander entsprechende Elemente sind in allen Figuren mit den gleichen Bezugszeichen versehen.Identical and corresponding elements are provided in all figures with the same reference numerals.

Eine Legebarrenanordnung nach Fig. 1 weist eine Legebarre 2, die auch als Legeschiene bezeichnet werden kann, auf. An der Legebarre 2 sind mehrere Fadenführer 3 befestigt, die beispielsweise als Lochnadeln oder Legenadeln ausgebildet sind.A guide bar arrangement according to Fig. 1 has a guide bar 2, which can also be referred to as a guide bar, on. At the guide bar 2 more thread guide 3 are fixed, which are formed for example as a punch needles or guide needles.

Die Legebarre wird im Betrieb hin- und hergehend angetrieben, wie dies durch einen Doppelpfeil 4 dargestellt ist. Der Doppelpfeil 4 zeigt eine Richtung parallel zur Längserstreckung der Legebarre an. In vielen Fällen wird die Legebarre 2 bei einem Maschenbildungsvorgang auch noch senkrecht zur Zeichenebene bewegt. Dies wird im vorliegenden Fall aber nicht weiter erläutert.The guide bar is driven back and forth in operation, as shown by a double arrow 4. The double arrow 4 indicates a direction parallel to the longitudinal extension of the guide bar. In many cases, the guide bar 2 is also moved perpendicular to the plane in a stitch-forming process. However, this will not be explained further in the present case.

Die Legebarrenanordnung 1 weist einen Versatzantrieb auf. Der Versatzantrieb weist ein Musterelement 5 in Form einer Musterscheibe mit einer ersten Umfangsfläche 6 auf. Das Musterelement 5 wird von einem Antriebsmotor 7 gedreht. Anstelle einer Musterscheibe kann man auch eine Musterkette verwenden.The guide bar assembly 1 has an offset drive. The offset drive has a pattern element 5 in the form of a pattern disk with a first peripheral surface 6. The pattern element 5 is rotated by a drive motor 7. Instead of a pattern disk you can also use a pattern chain.

Ein Musterstößel 8 liegt mit einer Rolle 9 an der ersten Umfangsfläche 6 des Musterelements 5 an. Die erste Umfangsfläche 6 hat in Umfangsrichtung unterschiedliche Entfernungen zu einer Rotationsachse 10 des Musterelements 5. Dementsprechend wird der Musterstößel 8 von der Rotationsachse 10 weggedrückt, wenn die Umfangsfläche eine größere Entfernung zur Rotationsachse 10 hat. Die Richtung weg von der Rotationsachse 10 wird im Folgenden auch als "Antriebsrichtung" bezeichnet. Der Versatzantrieb wirkt also nur in Antriebsrichtung auf die Legebarre 2, also in eine einzige Richtung.A pattern tappet 8 abuts with a roller 9 on the first peripheral surface 6 of the pattern element 5. The first peripheral surface 6 has circumferentially different distances to a rotation axis 10 of the pattern element 5. Accordingly, the pattern plunger 8 is pushed away from the rotation axis 10 when the peripheral surface has a greater distance from the axis of rotation 10. The direction away from the axis of rotation 10 is also referred to below as the "drive direction". The offset drive thus acts only in the drive direction on the guide bar 2, ie in a single direction.

Um die Rolle 5 in Anlage an der ersten Umfangsfläche 6 zu halten, ist eine Rückholanordnung vorgesehen. Die Rückholanordnung wirkt entgegen zur Antriebsrichtung auf die Legebarre 2. Dementsprechend wird die Rolle 9 immer in Anlage an der ersten Umfangsfläche 6 gehalten. Damit kann die Rolle 9 der Kontur der ersten Umfangsfläche 6 sehr genau und spielfrei folgen, so dass eine ebenso genaue Steuerung der Bewegung der Legebarre 2 in Richtung des Doppelpfeils 4 möglich ist, also parallel zu ihrer Längserstreckung.In order to hold the roller 5 in abutment with the first peripheral surface 6, a return assembly is provided. The return assembly acts counter to the drive direction on the guide bar 2. Accordingly, the roller 9 is always held in contact with the first peripheral surface 6. Thus, the roller 9 of the contour of the first peripheral surface 6 follow very accurately and without play, so that equally accurate control of the movement of the guide bar 2 in the direction of the double arrow 4 is possible, ie parallel to its longitudinal extent.

Die Rückholanordnung weist einen Rückholantrieb auf, der im vorliegenden Fall ein Kurvenelement 11 aufweist. Das Kurvenelement 11 weist eine zweite Umfangsfläche 12 auf. Das Kurvenelement 11 kann, genau wie das Musterelement 5, als Kurvenscheibe ausgebildet sein. Das Kurvenelement 11 ist auf der gleichen Rotationsachse 10 wie das Kurvenelement 5 angeordnet und wird vom gleichen Antriebsmotor 7 angetrieben. Das Kurvenelement 11 dreht sich also synchron mit dem Musterelement 5 und die erste Umfangsfläche 6 und die zweite Umfangsfläche 12 laufen synchron miteinander um.The return arrangement has a return drive, which has a cam element 11 in the present case. The cam element 11 has a second peripheral surface 12. The cam member 11 may, like the pattern member 5, be formed as a cam. The cam element 11 is on the same axis of rotation 10 as the cam element 5 arranged and is driven by the same drive motor 7. Thus, the cam member 11 rotates synchronously with the pattern member 5, and the first peripheral surface 6 and the second peripheral surface 12 rotate in synchronism with each other.

Ein Abtastelement 13, das ebenfalls die Form einer Rolle haben kann, ist mit einem Umlenkhebel 14 verbunden. Der Umlenkhebel 14 ist um einen Schwenkpunkt 15 verschwenkbar. Der Umlenkhebel 14 weist einen ersten Hebelarm 16 auf, der den Schwenkpunkt 15 mit dem Abtastelement 13 verbindet, und einen zweiten Hebelarm 17, der den Schwenkpunkt 15 mit einem Seilabschnitt 18 verbindet. Der Seilabschnitt 18 ist über eine Feder 19 und einen zweiten Seilabschnitt 20 mit der Legebarre 2 verbunden. Die Feder 19 steht unter einer kleinen Vorspannung, so dass über den Umlenkhebel 14 das Abtastelement 13 permanent in Anlage an der zweiten Umfangsfläche 12 gehalten wird.A sensing element 13, which may also be in the form of a roller, is connected to a bell crank 14. The reversing lever 14 is pivotable about a pivot point 15. The reversing lever 14 has a first lever arm 16, which connects the pivot point 15 with the sensing element 13, and a second lever arm 17 which connects the pivot point 15 with a cable section 18. The cable section 18 is connected via a spring 19 and a second cable section 20 with the guide bar 2. The spring 19 is under a small bias, so that over the reversing lever 14, the sensing element 13 is permanently held in contact with the second peripheral surface 12.

Wenn sich nun das Musterelement 5 und das Kurvenelement 11 gemeinsam drehen und die erste Umfangsfläche 6 und die zweite Umfangsfläche 12 entsprechend aufeinander abgestimmt sind, dann ist in einem Bereich der ersten Umfangsfläche 6, der sich an die Drehachse 10 annähert, ein entsprechender Bereich an der zweiten Umfangsfläche 12 vorgesehen, der eine entsprechend größere Entfernung zur Drehachse aufweist. Dadurch ist es möglich, die Rolle 9 permanent in Anlage an der ersten Umfangsfläche 6 zu halten, ohne dass sich größere Längenänderungen der Feder 19 und damit Änderungen der auf die Legebarre 2 wirkenden Kräfte ergeben. Es ist zu erkennen, dass die Angriffspositionen von Rolle 9 und Abtastelement 13 in Umfangsrichtung zueinander versetzt sind.If now the pattern element 5 and the cam member 11 rotate together and the first peripheral surface 6 and the second peripheral surface 12 are correspondingly matched to each other, then in a region of the first peripheral surface 6, which approaches the axis of rotation 10, a corresponding region on the second peripheral surface 12 is provided which has a correspondingly greater distance from the axis of rotation. This makes it possible to keep the roller 9 permanently in contact with the first peripheral surface 6, without resulting in greater changes in length of the spring 19 and thus changes in the forces acting on the guide bar 2 forces. It can be seen that the engagement positions of roller 9 and sensing element 13 are circumferentially offset from each other.

Man kann allerdings auch vorsehen, dass die zweite Umfangsfläche 12 so gestaltet ist, dass die Feder 19 stärker gespannt wird, wenn Massenkräfte aus der Versatzbewegung der Kraft der Feder 19 entgegenwirken und die Kraft der Feder 19 reduziert wird, wenn die Massenkräfte in die gleiche Richtung wie die Kraft der Feder 19 wirkt. Somit kann die Kraft, die auf den Musterstößel 8 zwischen dem Musterelement 5 und der Legebarre 2 wirkt, im Normalbetrieb idealerweise konstant gehalten werden. Wechselnde elastische Verformungen zwischen dem Musterelement 5 und der Legebarre 2 werden vermieden und die Teilungsgenauigkeit kann sehr präzise eingehalten werden.However, it can also be provided that the second peripheral surface 12 is designed so that the spring 19 is tensioned more when counteracting inertial forces from the displacement movement of the force of the spring 19 and the Force of the spring 19 is reduced when the mass forces in the same direction as the force of the spring 19 acts. Thus, the force acting on the pattern tappet 8 between the pattern element 5 and the guide bar 2 can ideally be kept constant during normal operation. Alternating elastic deformations between the pattern element 5 and the guide bar 2 are avoided and the pitch accuracy can be maintained very precisely.

Fig. 2 zeigt eine vereinfachte Ausführungsform, bei der das Musterelement 5 und das Kurvenelement 11 identisch sind. Dementsprechend sind auch die erste Umfangsfläche 6 und die zweite Umfangsfläche 12 identisch. Mittels des Umlenkhebels 14 wird die Bewegung des Abtastelements 13 in eine Bewegung entgegengesetzt zur Antriebsrichtung umgelenkt. Die erste Umfangsfläche 6 und die zweite Umfangsfläche 12, die ja im vorliegenden Fall identisch sind, sind so ausgebildet, dass die Bewegung des Abtastelements 13 und die Bewegung 9 entgegengesetzt gleich ausgebildet sind. Dies kann auch dadurch erfolgen, dass man an der ersten Umfangsfläche 6 und der zweiten Umfangsfläche 12 mehrere Rapporte vorsieht und die Position von Rolle 9 und Abtastelement 13 um einen oder mehrere Rapporte oder Teile der Rapporte versetzt ist. Fig. 2 shows a simplified embodiment in which the pattern element 5 and the cam element 11 are identical. Accordingly, the first peripheral surface 6 and the second peripheral surface 12 are identical. By means of the reversing lever 14, the movement of the sensing element 13 is deflected in a movement opposite to the drive direction. The first peripheral surface 6 and the second peripheral surface 12, which are identical in the present case, are formed so that the movement of the sensing element 13 and the movement 9 are of opposite configuration. This can also be done by providing a plurality of reports on the first peripheral surface 6 and the second peripheral surface 12 and the position of the roller 9 and the scanning element 13 is offset by one or more reports or parts of the reports.

Durch diese Anordnung wird die Rückholfeder 19 mit den Seilabschnitten 18, 20 in gleicher Weise bewegt wie der Musterstößel 8 und eine gleichbleibende Rückholkraft wird sichergestellt.By this arrangement, the return spring 19 is moved with the cable sections 18, 20 in the same manner as the pattern tappet 8 and a constant return force is ensured.

Die Ausgestaltungen nach den Fig. 1 und 2 setzen eine biegesteife Legebarre 2 voraus, also eine Legebarre, die mit Druck oder auf Stoß belastet werden kann, ohne sich zu verformen.The embodiments according to the Fig. 1 and 2 require a rigid guide bar 2, so a guide bar that can be loaded with pressure or shock without deforming.

Claims (8)

  1. Guide bar assembly (1) of a warp-knitting machine, which has at least one guide bar (2, 21), an offset drive (5 - 7) which acts on the guide bar (2, 21) in a single drive direction, and a return assembly which acts counter to the drive direction, wherein the return assembly has a return drive (11 - 17), wherein the return drive (11 - 17) acts on the guide bar by way of a spring (19), characterized in that the spring is disposed in a connection element (18, 20) between the guide bar (2) and the return drive (11 - 17).
  2. Guide bar assembly according to Claim 1, characterized in that the return drive (11 - 17) is actuated so as to be synchronous with the offset drive (5 - 7).
  3. Guide bar assembly according to Claim 2, characterized in that the offset drive has a pattern element (5) having a first circumferential face (6), which acts on a pattern tappet (8) and the return drive has a cam element (11) having a second circumferential face (12), wherein the circumferential faces (6, 12) revolve so as to be mutually synchronous.
  4. Guide bar assembly according to Claim 3, characterized in that the return drive (11 - 17) has a sensor element (13) which bears on the second circumferential face, wherein the sensor element (13) is connected to a bell crank (14) which is pivotable about a pivot point (15), and the guide bar (2) is connected to the bell crank (14) at a position which is disposed on that side of the pivot point (15) that faces away from the sensor element (13).
  5. Guide bar assembly according to Claim 4, characterized in that the first circumferential face (6) and the second circumferential face (12) in each case have a plurality of repeats, and the sensor element (13) is offset in relation to the pattern tappet (8) by at least one repeat.
  6. Guide bar assembly according to one of Claims 3 to 5, characterized in that the cam element (11) and the pattern element (5) are disposed on a common rotation axis (10).
  7. Guide bar assembly according to one of Claims 3 to 6, characterized in that the cam element (11) and the pattern element (5) are identical.
  8. Guide bar assembly according to one of Claims 1 to 7, characterized in that the offset drive (5 - 7) acts exclusively by way of pressure on the guide bar (2), and the return drive (11 - 17) acts exclusively by way of traction on the guide bar.
EP15168573.2A 2015-05-21 2015-05-21 Guide bar assembly for a warp knitting machine Active EP3095904B1 (en)

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Application Number Priority Date Filing Date Title
EP15168573.2A EP3095904B1 (en) 2015-05-21 2015-05-21 Guide bar assembly for a warp knitting machine
CN201610032997.8A CN106167955B (en) 2015-05-21 2016-01-19 The guide bar assembly of tricot machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15168573.2A EP3095904B1 (en) 2015-05-21 2015-05-21 Guide bar assembly for a warp knitting machine

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EP3095904A1 EP3095904A1 (en) 2016-11-23
EP3095904B1 true EP3095904B1 (en) 2017-03-22

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KR20200126895A (en) * 2019-04-30 2020-11-09 칼 마이어 알앤디 게엠베하 Warp knitting machine and method for operator assistance in a warp knitting machine

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CN117144555B (en) * 2023-11-01 2024-02-27 福建省鑫港纺织机械有限公司 Warp knitting machine sideslip device of self-adaptation yarn tension adjustment

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KR20200126894A (en) * 2019-04-30 2020-11-09 칼 마이어 알앤디 게엠베하 Warp knitting machine
KR20200126895A (en) * 2019-04-30 2020-11-09 칼 마이어 알앤디 게엠베하 Warp knitting machine and method for operator assistance in a warp knitting machine
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CN106167955A (en) 2016-11-30
CN106167955B (en) 2018-05-08

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