EP0405130A1 - Latch needle for machines producing knitted fabrics - Google Patents

Latch needle for machines producing knitted fabrics Download PDF

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Publication number
EP0405130A1
EP0405130A1 EP90109546A EP90109546A EP0405130A1 EP 0405130 A1 EP0405130 A1 EP 0405130A1 EP 90109546 A EP90109546 A EP 90109546A EP 90109546 A EP90109546 A EP 90109546A EP 0405130 A1 EP0405130 A1 EP 0405130A1
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EP
European Patent Office
Prior art keywords
needle
tongue
latch
symmetry
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90109546A
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German (de)
French (fr)
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EP0405130B1 (en
Inventor
Bernd Schuler
Kurt Wiedenhöfer
Otto Langenstein
Siegfried Wissmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Groz Beckert KG
Original Assignee
Theodor Groz and Soehne and Ernst Beckert Nadelfabrik KG
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Application filed by Theodor Groz and Soehne and Ernst Beckert Nadelfabrik KG filed Critical Theodor Groz and Soehne and Ernst Beckert Nadelfabrik KG
Publication of EP0405130A1 publication Critical patent/EP0405130A1/en
Application granted granted Critical
Publication of EP0405130B1 publication Critical patent/EP0405130B1/en
Anticipated expiration legal-status Critical
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
    • D04B35/04—Latch needles

Definitions

  • the invention relates to a latch needle for machines for the manufacture of knitted fabrics, with a needle shaft, a needle head and a needle tongue pivotally mounted in a tongue slot of the needle shaft about a transverse tongue axis.
  • the tongue needle is designed with a reduced shaft height in its front shaft region facing the head.
  • the shaft height between the needle foot and throat is kept as small as possible. Because of this low shaft height, the stability of the latch needle in the shaft region adjoining the head is correspondingly reduced.
  • the needle Under the influence of lateral forces which act on the head and the throat area of the needle during the stitch formation process and originate, inter alia, from the goods take-off device, the needle is not only removed from its symmetrical position by the predetermined amount corresponding to the necessary play between the needle bed walls and the needle shaft moved to the corresponding needle bed wall, but the stitch-forming part of the latch needle protruding from the needle bed is inevitably elastically pushed aside somewhat from its originally central position. A needle tongue which is no longer exactly aligned with the hook tip with its spoon is thus brought up to the adjacent knitting tool, for example a circuit board, so that it touches the knitting tool with its tongue spoon during its pivoting movement.
  • the adjacent knitting tool for example a circuit board
  • the object of the invention is therefore to provide a latch needle, the needle tongue of which regardless of the hinge length and with a low needle shaft even after a long period of use under the action of lateral forces closes perfectly on the needle head and remains so close to the longitudinal plane of symmetry of the needle during its pivoting movement that rubbing against adjacent knitting tools, in particular sinkers, is reliably prevented.
  • the latch needle mentioned at the outset is characterized according to the invention in that the latch slot is arranged with its longitudinal plane of symmetry including an acute angle with the longitudinal plane of symmetry of the needle shaft.
  • the tongue slot with its longitudinal plane of symmetry is not arranged lying in the center plane of the needle, when the needle is appropriately installed in the machine, it is ensured that under the action of the lateral forces occurring during the stitch formation process, the needle tongue during its pivoting movement with its spoon is not substantially above the plane of needle symmetry, ie can be pushed out to the side so far that it brushes against the adjacent knitting tool. At the same time, the flawless, essentially central support of the tongue spoon on the needle head is retained.
  • the tongue slot with its longitudinal plane of symmetry can be arranged pivoted toward the needle sides with respect to the longitudinal plane of symmetry of the needle shaft with respect to the longitudinal plane of symmetry of the needle shaft, so that the tongue slot is inclined in the plan view of the needle upper side.
  • the arrangement can also be such that the tongue slot with its longitudinal plane of symmetry extends around a longitudinal axis in the needle shaft Axis is laterally tilted.
  • the acute angle enclosed between the longitudinal plane of symmetry, the needle tongue and the longitudinal plane of symmetry of the needle shaft which is characteristic of the lateral pivoting and / or tilting of the longitudinal plane of symmetry of the tongue slot, can expediently lie with its apex in the area of the tongue slot.
  • embodiments are also conceivable in which the apex of this acute angle comes to lie outside the latch slot.
  • the size of the acute angle depends, among other things. on the jaw height, the needle shaft thickness and the installation conditions of the needle in the associated knitting machine. It is advantageously between 0.5 ° and 6 °.
  • the needle shaft in the region of the transition to the throat may have at least one elevation on its upper side, which provides the needle with improved support by securely resting against the needle bed walls Gives the machine a needle bed.
  • the elevation can prevent the needle in its shaft region adjacent to the needle head from operating under critical conditions, under the influence of lateral forces, beyond the amount dictated by the inevitable play between the tongue needle and the needle bed walls in the direction of the needle bed wall opposite the rotational movement of the needle cylinder about its longitudinal axis tilts.
  • the protruding from the needle bed The stitch-forming part of the latch needle with the needle head and needle tongue is thereby additionally held in a position appropriate for a trouble-free workflow.
  • Machines for the production of knitted fabrics are preferably knitting and knitting machines, but in particular circular knitting and knitting machines, which work with latch needles and in which, due to the technological circumstances, for example due to the rotary movement of the needle cylinder and the dial or, as a result of the goods take-off, lateral forces acting on the needle head and / or tongue and the subsequent needle shaft region occur.
  • the latch needle shown in FIG. 1 using the designation according to DIN ISO 8119, has a needle shaft 1 which carries a foot 2 at one end and a needle head or hook 3 at the other end.
  • a longitudinal tongue slot 8 is formed in the needle shaft 1 in the region of the breast designated by 4, which is followed by a throat 6 on the upper side 7 of the needle.
  • the tongue slot 8 has an opening 10 which opens toward the needle back 9 and is arranged approximately below the tongue axis 120.
  • a needle tongue 11 is pivotally mounted in the tongue slot 8 about a transverse tongue axis 120.
  • the needle tongue 11 is formed at its end facing away from the tongue axis 120 with a tongue spoon 12 which is seated on a tongue shaft 13 which dips into the tongue slot 8 and has the bearing bore for the tongue axis 120.
  • the tongue spoon 12 lies centrally on the hook tip 14.
  • the elongated, laterally parallel flanked tongue slot 8 is milled into the needle shaft 1 punched out of sheet metal (steel strip) or made of steel wire such that its longitudinal plane of symmetry 15 includes an acute angle with the longitudinal plane of symmetry 16 of the needle shaft 1.
  • the tongue slot 8 with its longitudinal plane of symmetry 15 is pivoted obliquely toward the needle shaft sides 18, 19 with respect to the longitudinal plane of symmetry 16 of the needle shaft 1 with its longitudinal plane of symmetry 15 about a vertical axis 17 extending from the needle upper side 7 to the needle back 9 arranged, the tip enclosed between the two longitudinal symmetry planes 15, 16 Angle is designated 20.
  • the vertical axis 17 runs through the opening 10; it is aligned parallel to the side flanks of the tongue slot 8, which means that the apex of the acute angle 20 lies within the area of the tongue slot 8.
  • the tongue slot 8 with its longitudinal plane of symmetry 15 is arranged laterally tilted about an axis 21 (FIG. 6) extending in the longitudinal direction of the needle shaft, so that the one between the two Longitudinal symmetry planes 15, 16 included acute angles 20a result from FIG. 6.
  • the acute angle 20 or 20a is of the order of 0.5 ° to 6 °; In exceptional cases, deviations from this area are possible on both sides.
  • the arrangement of the tongue slot 8 according to the embodiment according to FIGS. 3, 4 can also be combined with that according to the embodiment according to FIGS. 5, 6, such that the tongue slot 8 lies "skewed" in the needle shaft 1 and accordingly both acute angle 20 and the acute angle 20a between the two longitudinal symmetry planes 15, 16 occurs.
  • these two acute angles 20, 20a can be of the same or preferably different sizes.
  • the needle tongue 11 which is guided laterally with its tongue shaft 13 in the tongue slot 8, comes to lie in the closed position in the rest position in such a way that its spoon is displaced to one side on the hook tip 14 rests.
  • the latch needle shown in FIGS. 3, 5 is inserted, for example, into the needle cylinder of a circular knitting machine rotating clockwise, as indicated by an arrow 22 in FIG. 5, the needle tongue 11 and somewhat also the needle head 3 are counteracted by the acting side forces the direction of the arrow is bent somewhat elastically to the side, the needle shaft 1 being pressed against the associated side wall of the needle bed on the needle side 19 located at the rear in the direction of rotation.
  • the tongue spoon 12 Due to the inclined or tilted position of the tongue slot 8, however, it is ensured that the tongue spoon 12 covers the hook tip 14 properly and with its longitudinal plane of symmetry 15 cannot be pushed laterally beyond the longitudinal symmetry plane 16 of the needle shaft 1 in the direction of rotation 22. This certainly precludes the tongue spoon 12 from brushing against an adjacent plate, etc., even when finely divided.
  • the two described embodiments of the latch needle have a toothed tongue spoon 12.
  • the invention can also be used to the same extent for latch needles with a toothed needle head 3, as it is independent of the design of the contact surface of the needle tongue on the needle head.
  • the needle shaft 1 is provided on the upper side 7 in the area of the transition to the throat 6 with an elevation 23, which may also be shorter or may be replaced by several elevations of the same type arranged one behind the other.
  • This elevation 23, which may also be considerably shorter than shown in the drawing, prevents the latch needle in its relatively low shaft area adjoining the throat 6 under the action of the lateral forces acting on the needle head 3 between the needle bed walls by an amount beyond the operationally necessary play is tilted or wound to such an extent that under difficult operating conditions there is still the risk of the needle tongue being touched 11 occurs on the adjacent board, etc.
  • the stitch-forming part of the latch needle with the needle head 3 and the latch 11 protruding from the needle cylinder is thereby held in the correct position in the needle bed for a trouble-free workflow even under these conditions.

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

Abstract

In a latch needle for machines for producing knitted fabrics, the latch slot (8) arranged in the needle shank (1) and intended for receiving the needle latch (11) is so arranged that it forms with its longitudinal plane of symmetry (15) an acute angle with the longitudinal plane of symmetry (16) of the needle shank. <IMAGE>

Description

Die Erfindung betrifft eine Zungennadel für Maschinen zur Herstellung von Maschenware,mit einem Nadelschaft, einem Nadelkopf und einer in einem Zungenschlitz des Nadelschaftes um eine quer verlaufende Zungenachse schwenkbar gelagerten Nadelzunge.The invention relates to a latch needle for machines for the manufacture of knitted fabrics, with a needle shaft, a needle head and a needle tongue pivotally mounted in a tongue slot of the needle shaft about a transverse tongue axis.

Um eine ordnungsgemäße Maschenware zu erzeugen, muß gewährleistet sein, daß sich die Nadelzungen bei der Maschenbildung einwandfrei öffnen und schließen. Die Nadelzunge ist deshalb in dem Zungenschlitz des Nadel­schaftes eng geführt und mit ihrem Zungenlöffel auf die Hakenspitze ausgerichtet, derart, daß trotz des mit Rücksicht auf eine leichte Verschwenkbarkeit er­forderlichen axialen und radialen Lagerspieles der Zungenlöffel im geschlossenen Zustand einwandfrei auf dem Nadelkopf aufliegt. Dieses Lagerspiel und bei der Maschen­bildung auf die Nadelzunge und den Nadelkopf einwirkende Seitenkräfte, die beispielsweise bei einer Rundstrickma­schine von der Drehbewegung des Nadelzylinders und der Rippscheibe herrühren, können zur Folge haben, daß wegen des unvermeidlichen axialen Spiels und des Verschleißes die Na­delzunge, insbesondere nach längerer Betriebsdauer, seitlich ausgelenkt wird, mit dem Ergebnis, daß ihr Zungenlöffel nicht mehr mittig auf dem Nadelkopf aufliegt und an dem der Nadel benachbarten Strick­werkzeug, beispielsweise einer benachbarten Platine, streift. Dadurch wird die Schwenkbewegung der Nadel­zunge behindert, was eine Längsstreifenbildung in der Ware zur Folge hat; außerdem tritt ein zusätz­licher seitlicher Zungenverschleiß auf.In order to produce a proper knitwear, it must be ensured that the needle tongues open and close properly when stitching. The needle tongue is therefore closely guided in the tongue slot of the needle shaft and aligned with its tongue spoon on the tip of the hook, such that despite the with regard to the need for easy pivoting, the axial and radial bearing play of the tongue spoon lies perfectly on the needle head in the closed state. This bearing play and the lateral forces acting on the needle tongue and the needle head during stitch formation, which, for example in a circular knitting machine, result from the rotary movement of the needle cylinder and the dial, can result in the needle tongue, in particular after a longer period, due to the inevitable axial play and wear Operating time, is laterally deflected, with the result that your tongue spoon no longer rests centrally on the needle head and brushes against the knitting tool, for example an adjacent board, adjacent to the needle. This hinders the pivoting movement of the needle tongue, which results in the formation of longitudinal stripes in the goods; there is also additional lateral tongue wear.

Diese unerwünschte seitliche Auslenkung der Nadelzunge wird häufig noch dadurch begünstigt, daß die Zungen­nadel in ihrem dem Kopf zugewandten vorderen Schaft­bereich mit verminderter Schafthöhe ausgebildet ist. So wird z.B., um Gewicht zu sparen, insbesondere bei Nadeln für Kleinrundstrickmaschinen, die Schafthöhe zwischen Nadelfuß und Kehle möglichst klein gehalten. Wegen dieser niedrigen Schafthöhe ist die Stabilität der Zungennadel in dem an den Kopf anschließenden Schaftbereich entsprechend vermindert. Unter der Ein­wirkung von Seitenkräften, die beim Maschenbildungs­vorgang an dem Kopf-und dem Kehlbereich der Nadel an­greifen und u.a. von der Warenabzugsvorrichtung her­rühren, wird die Nadel nicht nur um das dem notwendi­gen Spiel zwischen den Nadelbettwänden und dem Nadel­schaft entsprechende, vorgegebene Maß aus ihrer Symmetrielage heraus zu der entsprechenden Nadelbettwand hin bewegt, sondern es wird auch der aus dem Nadelbett vorragende maschen­bildende Teil der Zungennadel zwangsläufig elastisch etwas aus seiner ursprünglich mittigen Lage heraus zur Seite gedrückt. Eine mit ihrem Löffel nicht mehr genau auf die Hakenspitze ausgerichtete Nadelzunge wird damit an das benachbarte Strickwerkzeug, beispiels­weise eine Platine, herangeführt, so daß sie bei ihrer Schwenkbewegung mit ihrem Zungenlöffel an dem Strick­werkzeug streift.This undesired lateral deflection of the needle tongue is often further promoted by the fact that the tongue needle is designed with a reduced shaft height in its front shaft region facing the head. For example, in order to save weight, especially with needles for small circular knitting machines, the shaft height between the needle foot and throat is kept as small as possible. Because of this low shaft height, the stability of the latch needle in the shaft region adjoining the head is correspondingly reduced. Under the influence of lateral forces which act on the head and the throat area of the needle during the stitch formation process and originate, inter alia, from the goods take-off device, the needle is not only removed from its symmetrical position by the predetermined amount corresponding to the necessary play between the needle bed walls and the needle shaft moved to the corresponding needle bed wall, but the stitch-forming part of the latch needle protruding from the needle bed is inevitably elastically pushed aside somewhat from its originally central position. A needle tongue which is no longer exactly aligned with the hook tip with its spoon is thus brought up to the adjacent knitting tool, for example a circuit board, so that it touches the knitting tool with its tongue spoon during its pivoting movement.

Bei einer aus der DE-PS 31 40 386 bekannten Zungennadel ist eine Abhilfe in der Weise versucht worden, daß der Zungenlöffel, bezogen auf die Symmetrieebene des Zungen­schaftes, zu einer Seite des Nadelschaftes hinweisend schräg gestellt ist, um damit zu gewährleisten, daß in der Schließstellung, und zwar sowohl in der Ruhe­stellung der Zungennadel als vor allem auch während des Strick- oder Wirkvorganges, wenn die Nadelzunge infolge der Seitenkräfte an die Zungenschlitzwand angedrückt wird, die Auflage des Zungenlöffels auf dem Nadelkopf gewährleistet ist. Solche Zungennadeln haben sich in der Praxis gut bewährt. In dem Bestre­ben, den Nadelhub weiter zu verringern, und damit die Strickgeschwindigkeiten zu erhöhen, werden aber heute Zungennadeln zunehmend mit sehr kurzer Scharnierlänge hergestellt, wobei die Zungenlänge teilweise nur noch 2 mm einschließlich Zungenlöffel beträgt. Bei derart kurzen Nadelzungen kann aber der Zungenlöffel aus fertigungstechnischen Gründen nicht mehr einwandfrei schräg gestellt werden.In a tongue needle known from DE-PS 31 40 386 a remedy has been attempted in such a way that the tongue spoon, based on the plane of symmetry of the tongue shaft, is inclined to one side of the needle shaft in order to ensure that in the Closed position, both in the rest position of the latch needle and especially during the knitting or knitting process, when the needle tongue is pressed against the tongue slot wall due to the side forces, the support of the tongue spoon on the needle head is guaranteed. Such latch needles have proven their worth in practice. In an effort to further reduce the needle stroke and thus increase the knitting speeds, today tongue needles are increasingly being manufactured with a very short hinge length, the tongue length sometimes being only 2 mm including the tongue spoon. With such short needle tongues, however, the tongue spoon can no longer be properly tilted for manufacturing reasons.

Aufgabe der Erfindung ist es deshalb, eine Zungennadel zu schaffen, deren Nadelzunge unabhängig von der Schar­nierlänge und bei niedrigem Nadelschaft auch nach länge­rer Gebrauchsdauer unter der Einwirkung von Seitenkräften auf den Nadelkopf einwandfrei schließt und bei ihrer Schwenkbewegung so nahe bei der Längssymmetrieebene der Nadel verbleibt, daß ein Anstreifen an benachbar­ten Strickwerkzeugen, insbesondere Platinen, mit Sicherheit verhindert ist.The object of the invention is therefore to provide a latch needle, the needle tongue of which regardless of the hinge length and with a low needle shaft even after a long period of use under the action of lateral forces closes perfectly on the needle head and remains so close to the longitudinal plane of symmetry of the needle during its pivoting movement that rubbing against adjacent knitting tools, in particular sinkers, is reliably prevented.

Zur Lösung dieser Aufgabe ist die eingangs genannte Zungennadel erfindungsgemäß dadurch gekennzeichnet, daß der Zungenschlitz mit seiner Längssymmetrieebene einen spitzen Winkel mit der Längssymmetrieebene des Nadelschaftes einschließend angeordnet ist.To achieve this object, the latch needle mentioned at the outset is characterized according to the invention in that the latch slot is arranged with its longitudinal plane of symmetry including an acute angle with the longitudinal plane of symmetry of the needle shaft.

Dadurch, daß der Zungenschlitz mit seiner Längssymmetrie­ebene nicht in der Nadelmittenebene liegend angeordnet ist, ist bei entsprechendem Einbau der Nadel in die Maschine sichergestellt, daß unter der Einwirkung der beim Maschenbildungsvorgang auftretenden Seitenkräfte die Nadelzunge während ihrer Schwenkbewegung mit ihrem Löffel nicht wesentlich über die Nadelsymmetrie­ebene, d.h. seitlich so weit hinausgedrückt werden kann, daß sie an dem benachbarten Strickwerkzeug streift. Gleich­zeitig bleibt die einwandfreie,im wesentlichen mittige Auflage des Zungenlöffels auf dem Nadelkopf erhalten.Because the tongue slot with its longitudinal plane of symmetry is not arranged lying in the center plane of the needle, when the needle is appropriately installed in the machine, it is ensured that under the action of the lateral forces occurring during the stitch formation process, the needle tongue during its pivoting movement with its spoon is not substantially above the plane of needle symmetry, ie can be pushed out to the side so far that it brushes against the adjacent knitting tool. At the same time, the flawless, essentially central support of the tongue spoon on the needle head is retained.

In einer ersten Ausführungsform kann der Zungen­schlitz mit seiner Längssymmetrieebene um eine von der Nadeloberseite zum Nadelrücken verlaufende Hochachse bezüglich der Längssymmetrieebene des Nadelschaftes zu den Nadelseiten hin verschwenkt angeordnet sein, so daß der Zungenschlitz in der Draufsicht auf die Nadeloberseite schräg gestellt ist. Alternativ oder zusätzlich kann die Anordnung aber auch derart getrof­fen sein, daß der Zungenschlitz mit seiner Längssymmetrie­ebene um eine in Nadelschaftlängsrichtung verlaufende Achse seitlich gekippt angeordnet ist. Dabei kann der zwischen der Längssymmetrieebene, der Nadelzunge und der Längssymmetrieebene des Nadelschaftes einge­schlossene spitze Winkel, der für die seitliche Verschwenkung und/oder das Kippen der Längssym­metrieebene des Zungenschlitzes kennzeich­nend ist, mit seinem Scheitel zweckmäßigerweise im Bereiche des Zungenschlitzes liegen. Abhängig von der Nadelkonstruktion und den geometrischen Ver­hältnissen der Zungennadel sind aber auch Ausführungs­formen denkbar, bei denen der Scheitel dieses spitzen Winkels außerhalb des Zungenschlitzes zu liegen kommt.In a first embodiment, the tongue slot with its longitudinal plane of symmetry can be arranged pivoted toward the needle sides with respect to the longitudinal plane of symmetry of the needle shaft with respect to the longitudinal plane of symmetry of the needle shaft, so that the tongue slot is inclined in the plan view of the needle upper side. Alternatively or additionally, the arrangement can also be such that the tongue slot with its longitudinal plane of symmetry extends around a longitudinal axis in the needle shaft Axis is laterally tilted. The acute angle enclosed between the longitudinal plane of symmetry, the needle tongue and the longitudinal plane of symmetry of the needle shaft, which is characteristic of the lateral pivoting and / or tilting of the longitudinal plane of symmetry of the tongue slot, can expediently lie with its apex in the area of the tongue slot. Depending on the needle construction and the geometrical relationships of the latch needle, embodiments are also conceivable in which the apex of this acute angle comes to lie outside the latch slot.

Die Größe des spitzen Winkels hängt u.a. von der Backenhöhe, der Nadelschaftdicke und den Einbauver­hältnissen der Nadel in der zugehörigen Strickmaschine ab. Er liegt mit Vorteil im wesentlichen zwischen 0,5° und 6°.The size of the acute angle depends, among other things. on the jaw height, the needle shaft thickness and the installation conditions of the needle in the associated knitting machine. It is advantageously between 0.5 ° and 6 °.

Um die seitliche Führung der Zungennadel weiter zu ver­bessern und ihre Stabilität zu erhöhen, kann es zweck­mäßig sein, daß der Nadelschaft im Bereiche des Über­gangs zur Kehle auf seiner Oberseite wenigstens eine Erhebung aufweist, die der Nadel durch sichere Anlage an den Nadelbettwänden eine verbesserte Abstützung im Nadelbett der Maschine verleiht. Die Erhebung kann verhindern, daß bei einem Betrieb unter kritischen Bedingungen die Nadel in ihrem dem Nadel­kopf benachbarten Schaftbereich unter dem Einfluß von Seitenkräften über das durch das unvermeidliche Spiel zwischen Zungennadel und Nadelbettwänden vorgegebene Maß hinaus in Richtung der der Drehbewegung des Na­delzylinders entgegengesetzten Nadelbettwand um ihre Längsachse kippt. Der aus dem Nadelbett herausragende maschenbildende Teil der Zungennadel mit Nadelkopf und Nadelzunge wird dadurch zusätzlich in einer für einen störungsfreien Arbeitsablauf gemäßen Lage ge­halten.In order to further improve the lateral guidance of the latch needle and to increase its stability, it may be expedient for the needle shaft in the region of the transition to the throat to have at least one elevation on its upper side, which provides the needle with improved support by securely resting against the needle bed walls Gives the machine a needle bed. The elevation can prevent the needle in its shaft region adjacent to the needle head from operating under critical conditions, under the influence of lateral forces, beyond the amount dictated by the inevitable play between the tongue needle and the needle bed walls in the direction of the needle bed wall opposite the rotational movement of the needle cylinder about its longitudinal axis tilts. The protruding from the needle bed The stitch-forming part of the latch needle with the needle head and needle tongue is thereby additionally held in a position appropriate for a trouble-free workflow.

Unter Maschinen zur Herstellung von Maschenware,für die die neuen Zungennadeln eingesetzt werden können, sind vorzugsweise Strick- und Wirkmaschinen, insbe­sondere aber Rundstrick- und -wirkmaschinen verstanden, die mit Zungennadeln arbeiten und bei denen aufgrund der technologischen Gegebenheiten, beispielsweise we­gen der Drehbewegung des Nadelzylinders und der Ripp­scheibe oder, hervorgerufen durch den Warenabzug, an dem Na­delkopf und/oder -zunge und dem anschließenden Nadelschaftbe­reich angreifende Seitenkräfte auftreten.Machines for the production of knitted fabrics, for which the new latch needles can be used, are preferably knitting and knitting machines, but in particular circular knitting and knitting machines, which work with latch needles and in which, due to the technological circumstances, for example due to the rotary movement of the needle cylinder and the dial or, as a result of the goods take-off, lateral forces acting on the needle head and / or tongue and the subsequent needle shaft region occur.

In der Zeichnung ist ein Ausführungsbeispiel des Ge­genstandes der Erfindung dargestellt. Es zeigen:

  • Fig. 1 eine Zungennadel gemäß der Erfindung in einer Seitenansicht,
  • Fig. 2 den Kopf und den daran anschließenden Hals- und Brustbereich mit dem Zungenschlitz ent­sprechend der Einzelheit bei "A" der Zungen­nadel nach Fig. 1, teilweise im axialen Schnitt in einer Seitenansicht und in einem anderen Maßstab,
  • Fig. 3 die Zungennadel nach Fig. 1 in einer ersten Aus­führungsform in einer Draufsicht auf die Nadel­oberseite bei weggelassener Nadelzunge, in einem anderen Maßstab und Ausschnitt,
  • Fig. 4 die Zungennadel nach Fig. 3, geschnitten längs der Linie IV-IV der Fig. 3,
  • Fig. 5 die Zungennadel nach Fig. 1 in einer zweiten Ausführungsform in einer Draufsicht auf die Nadeloberseite, in einem anderen Maßstab und im Ausschnitt und
  • Fig. 6 die Zungennadel nach Fig. 5, geschnitten längs der Linie VI-VI der Fig. 5.
In the drawing, an embodiment of the object of the invention is shown. Show it:
  • 1 is a tongue needle according to the invention in a side view,
  • 2 shows the head and the adjoining neck and chest area with the tongue slit corresponding to the detail at "A" of the latch needle according to FIG. 1, partly in axial section in a side view and on a different scale,
  • 1 in a first embodiment in a plan view of the upper side of the needle with the needle tongue omitted, in a different scale and detail,
  • 4 shows the latch needle according to FIG. 3, cut along the line IV-IV of FIG. 3,
  • Fig. 5, the latch needle of FIG. 1 in a second embodiment in a plan view of the needle top, on a different scale and in the detail and
  • 6, the latch needle according to FIG. 5, cut along the line VI-VI of FIG. 5.

Die in Fig. 1 dargestellte Zungennadel weist unter Ver­wendung der Bezeichnungsweise nach DIN ISO 8119 einen Nadel­schaft 1 auf, der einenends einen Fuß 2 sowie anderen­ends einen Nadelkopf oder Haken 3 trägt. Im Bereiche der mit 4 bezeichneten Brust,an die sich eine Kehle 6 auf der Nadeloberseite 7 anschließt, ist in dem Nadel­schaft 1 ein längs verlaufender Zungenschlitz 8 ausgebildet. Der Zungenschlitz 8 weist einen sich zu dem Nadelrücken 9 hin öffnenden Durchbruch 10 auf, der etwa unterhalb der Zungenachse 120 angeordnet ist. Es gibt natürlich auch Na­delkonstruktionen, bei denen kein Durchbruch 10 vorhanden ist.The latch needle shown in FIG. 1, using the designation according to DIN ISO 8119, has a needle shaft 1 which carries a foot 2 at one end and a needle head or hook 3 at the other end. A longitudinal tongue slot 8 is formed in the needle shaft 1 in the region of the breast designated by 4, which is followed by a throat 6 on the upper side 7 of the needle. The tongue slot 8 has an opening 10 which opens toward the needle back 9 and is arranged approximately below the tongue axis 120. Of course there are also needle constructions in which there is no opening 10.

In dem Zungenschlitz 8 ist eine Nadelzunge 11 um eine quer verlaufende Zungenachse 120 schwenkbar gelagert. Die Nadelzunge 11 ist an ihrem der Zungenachse 120 abgewandten Ende mit einem Zungenlöffel 12 ausgebildet, der an einem in den Zungenschlitz 8 eintauchenden und die Lagerbohrung für die Zungenachse 120 aufweisen­den Zungenschaft 13 sitzt. In der in Fig. 2 dargestell­ten Schließstellung liegt der Zungenlöffel 12 mittig auf der Hakenspitze 14 auf.A needle tongue 11 is pivotally mounted in the tongue slot 8 about a transverse tongue axis 120. The needle tongue 11 is formed at its end facing away from the tongue axis 120 with a tongue spoon 12 which is seated on a tongue shaft 13 which dips into the tongue slot 8 and has the bearing bore for the tongue axis 120. In the closed position shown in FIG. 2, the tongue spoon 12 lies centrally on the hook tip 14.

Der längliche, seitlich parallelflankig begrenzte Zungen­schlitz 8 ist in den aus Blech (Stahlband) ausgestanzten oder aus Stahldraht gefertigen Nadelschaft 1 derart eingefräst, daß seine Längssymmetrieebene 15 mit der Längssymmetrieebene 16 des Nadelschaftes 1 einen spitzen Winkel einschließt.The elongated, laterally parallel flanked tongue slot 8 is milled into the needle shaft 1 punched out of sheet metal (steel strip) or made of steel wire such that its longitudinal plane of symmetry 15 includes an acute angle with the longitudinal plane of symmetry 16 of the needle shaft 1.

Bei der Ausführungsform nach den Fig. 3, 4 ist zu diesem Zwecke der Zungenschlitz 8 mit seiner Längs­symmetrieebene 15 um eine von der Nadeloberseite 7 zu dem Nadelrücken 9 verlaufende Hochachse 17 be­züglich der Längssymmetrieebene 16 des Nadelschaftes 1 schräg zu den Nadelschaftseiten 18, 19 hin ver­schwenkt angeordnet, wobei der zwischen den beiden Längssymmetrieebenen 15, 16 eingeschlossene spitze Winkel mit 20 bezeichnet ist. Die Hochachse 17 ver­läuft durch den Durchbruch 10; sie ist parallel zu den Seitenflanken des Zungenschlitzes 8 ausgerich­tet, was bedeutet, daß der Scheitel des spitzen Winkels 20 innerhalb des Bereiches des Zungenschlitzes 8 liegt.3, 4, the tongue slot 8 with its longitudinal plane of symmetry 15 is pivoted obliquely toward the needle shaft sides 18, 19 with respect to the longitudinal plane of symmetry 16 of the needle shaft 1 with its longitudinal plane of symmetry 15 about a vertical axis 17 extending from the needle upper side 7 to the needle back 9 arranged, the tip enclosed between the two longitudinal symmetry planes 15, 16 Angle is designated 20. The vertical axis 17 runs through the opening 10; it is aligned parallel to the side flanks of the tongue slot 8, which means that the apex of the acute angle 20 lies within the area of the tongue slot 8.

Bei der Ausführungsform nach den Fig. 5, 6 ist, wie insbesondere aus Fig. 6 zu entnehmen, der Zungenschlitz 8 mit seiner Längssymmetrieebene 15 um eine in Nadel­schaftlängsrichtung verlaufende Achse 21 (Fig. 6) seitlich gekippt angeordnet, so daß der zwischen den beiden Längssymmetrieebenen 15, 16 eingeschlossene spitze Winkel 20a sich aus Fig. 6 ergibt.In the embodiment according to FIGS. 5, 6, as can be seen in particular from FIG. 6, the tongue slot 8 with its longitudinal plane of symmetry 15 is arranged laterally tilted about an axis 21 (FIG. 6) extending in the longitudinal direction of the needle shaft, so that the one between the two Longitudinal symmetry planes 15, 16 included acute angles 20a result from FIG. 6.

Der spitze Winkel 20 bzw. 20a liegt in der Größenordnung von 0,5° bis 6°; in Ausnahmefällen sind auch Abweichungen von diesem Bereich nach beiden Seiten hin möglich.The acute angle 20 or 20a is of the order of 0.5 ° to 6 °; In exceptional cases, deviations from this area are possible on both sides.

Die Anordnung des Zungenschlitzes 8 nach der Ausfüh­rungsform nach den Fig. 3, 4 kann auch mit jener gemäß der Ausführungsform nach den Fig. 5, 6 kombiniert werden, derart, daß der Zungenschlitz 8 "windschief" in dem Nadelschaft 1 liegt und demgemäß sowohl der spitze Winkel 20 als auch der spitze Winkel 20a zwischen den beiden Längssymmetrieebenen 15, 16 auftritt. Diese beiden spitzen Winkel 20, 20a können in diesem Falle gleich oder vorzugsweise unterschiedlich groß sein.The arrangement of the tongue slot 8 according to the embodiment according to FIGS. 3, 4 can also be combined with that according to the embodiment according to FIGS. 5, 6, such that the tongue slot 8 lies "skewed" in the needle shaft 1 and accordingly both acute angle 20 and the acute angle 20a between the two longitudinal symmetry planes 15, 16 occurs. In this case, these two acute angles 20, 20a can be of the same or preferably different sizes.

In beiden beschriebenen Ausführungsformen ist zufolge der verschwenkten und/oder gekippten Lage des Zungenschlitzes 8 erreicht, daß in Ruhestellung die mit ihrem Zungenschaft 13 in dem Zungenschlitz 8 seitlich geführte Nadelzunge 11 in der Schließstellung so zu liegen kommt, daß ihr Löffel zu einer Seite hin verschoben auf der Haken­ spitze 14 aufliegt. Wenn die in den Fig. 3, 5 darge­stellte Zungennadel beispielsweise in den Nadelzylinder einer,wie durch einen Pfeil 22 in Fig. 5 angedeutet, im Uhrzeigersinn umlaufenden Rundstrickmaschine eingesetzt ist, werden die Nadelzunge 11 und etwas auch der Nadelkopf 3 durch die einwirkenden Seitenkräfte entgegen der Pfeilrichtung tung etwas elastisch seitlich ausgebogen, wobei der Nadelschaft 1 an der in Drehrichtung hinten liegen­den Nadelseite 19 an die zugeordnete Seitenwandung des Nadelbettes angedrückt wird. Zufolge der Schräg- bzw. Kippstellung des Zungenschlitzes 8 bleibt jedoch gewährleistet, daß der Zungenlöffel 12 die Haken­spitze 14 einwandfrei überdeckt und mit seiner Längs­symmetrieebene 15 nicht in Drehrichtung 22 seitlich über die Längssymmetrieebene 16 des Nadelschaftes 1 hinausgedrückt werden kann. Damit ist sicher ausge­schlossen, daß der Zungenlöffel 12 auch bei feiner Teilung an einer benachbarten Platine etc. bei seiner Schwenkbewegung anstreift.In both of the described embodiments, due to the pivoted and / or tilted position of the tongue slot 8, the needle tongue 11, which is guided laterally with its tongue shaft 13 in the tongue slot 8, comes to lie in the closed position in the rest position in such a way that its spoon is displaced to one side on the hook tip 14 rests. If the latch needle shown in FIGS. 3, 5 is inserted, for example, into the needle cylinder of a circular knitting machine rotating clockwise, as indicated by an arrow 22 in FIG. 5, the needle tongue 11 and somewhat also the needle head 3 are counteracted by the acting side forces the direction of the arrow is bent somewhat elastically to the side, the needle shaft 1 being pressed against the associated side wall of the needle bed on the needle side 19 located at the rear in the direction of rotation. Due to the inclined or tilted position of the tongue slot 8, however, it is ensured that the tongue spoon 12 covers the hook tip 14 properly and with its longitudinal plane of symmetry 15 cannot be pushed laterally beyond the longitudinal symmetry plane 16 of the needle shaft 1 in the direction of rotation 22. This certainly precludes the tongue spoon 12 from brushing against an adjacent plate, etc., even when finely divided.

Die beiden beschriebenen Ausführungsformen der Zungen­nadel weisen einen gezaschten Zungenlöffel 12 auf. Die Erfindung ist aber in gleichem Maße auch für Zungennadeln mit gezaschtem Nadelkopf 3 verwend­bar, wie sie überhaupt unabhängig von der Gestaltung der Auflagefläche der Nadelzunge auf den Nadelkopf ist.The two described embodiments of the latch needle have a toothed tongue spoon 12. However, the invention can also be used to the same extent for latch needles with a toothed needle head 3, as it is independent of the design of the contact surface of the needle tongue on the needle head.

Wie aus Fig. 1 zu entnehmen, ist der Nadelschaft 1 auf der Oberseite 7 in dem Bereiche des Übergangs zu der Kehle 6 mit einer Erhebung 23 versehen, die gegebenen­falls auch kürzer ausgebildet oder durch mehrere im Abstand hintereinander angeordnete Erhebungen gleicher Art ersetzt sein kann. Diese Erhebung 23, die gegebenen­falls auch wesentlich kürzer als in der Zeichnung dar­gestellt sein kann, verhindert, daß die Zungennadel in ihrem an die Kehle 6 anschließenden verhältnismäßig niederen Schaftbereich unter der Einwirkung der an dem Nadelkopf 3 angreifenden Seitenkräfte zwischen den Nadelbettwänden um ein über das betriebsnotwen­dige Spiel hinausgehendes Maß so weit gekippt oder ver­wunden wird, daß unter schwierigen Betriebsbedingungen doch noch die Gefahr eines Anstreifens der Nadelzunge 11 an der benachbarten Platine etc. auftritt. Der aus dem Nadelzylinder herausragende maschenbildende Teil der Zungennadel mit Nadelkopf 3 und Nadelzunge 11 wird dadurch auch unter diesen Bedingungen in einer für einen störungsfreien Arbeitsablauf richtigen Lage im Nadelbett gehalten.As can be seen from FIG. 1, the needle shaft 1 is provided on the upper side 7 in the area of the transition to the throat 6 with an elevation 23, which may also be shorter or may be replaced by several elevations of the same type arranged one behind the other. This elevation 23, which may also be considerably shorter than shown in the drawing, prevents the latch needle in its relatively low shaft area adjoining the throat 6 under the action of the lateral forces acting on the needle head 3 between the needle bed walls by an amount beyond the operationally necessary play is tilted or wound to such an extent that under difficult operating conditions there is still the risk of the needle tongue being touched 11 occurs on the adjacent board, etc. The stitch-forming part of the latch needle with the needle head 3 and the latch 11 protruding from the needle cylinder is thereby held in the correct position in the needle bed for a trouble-free workflow even under these conditions.

In Fig. 5 sind mit der Pfeilrichtung 22 die Verhält­nisse für eine im Uhrzeigersinn umlaufende Rundstrick­maschine angedeutet. Bei einer im Gegenuhrzeigersinn umlaufenden Rundstrickmaschine,wie sie in der Praxis auch weitverbreitet ist, kehren sich die Verhältnisse naturgemäß um.5, the conditions for a circular knitting machine rotating in the clockwise direction are indicated with the arrow direction 22. With a circular knitting machine rotating in the counterclockwise direction, as is also widely used in practice, the situation is naturally reversed.

Claims (8)

1. Zungennadel für Maschinen zur Herstellung von Maschenware mit einem Nadelschaft, einem Nadel­kopf und einer in einem Zungenschlitz des Nadel­schaftes um eine quer verlaufende Zungenachse schwenkbar gelagerten Nadelzunge, dadurch ge­kennzeichnet, daß der Zungenschlitz (8) mit seiner Längssymmetrieebene (15) einen spitzen Winkel (20, 20a) mit der Längssymmetrieebene (16) des Nadelschaftes (1) einschließend angeordnet ist.1. Tongue needle for machines for the manufacture of knitted fabrics with a needle shaft, a needle head and a needle tongue pivotally mounted in a tongue slot of the needle shaft about a transverse tongue axis, characterized in that the tongue slot (8) with its longitudinal plane of symmetry (15) forms an acute angle ( 20, 20a) is arranged including the longitudinal plane of symmetry (16) of the needle shaft (1). 2. Zungennadel nach Anspruch 1, dadurch gekennzeich­net, daß der Zungenschlitz (8) mit seiner Längs­symmetrieebene (15) um eine von der Nadelober­seite (7) zu dem Nadelrücken (9) verlaufende Hochachse (17) bezüglich der Längssymmetrieebene (16) des Nadelschaftes (1) zu den Nadelsei­ten (18, 19) hin verschwenkt angeordnet ist.2. latch needle according to claim 1, characterized in that the tongue slot (8) with its longitudinal plane of symmetry (15) about a from the top of the needle (7) to the needle back (9) extending vertical axis (17) with respect to the longitudinal plane of symmetry (16) of the needle shaft ( 1) is arranged pivoted toward the needle sides (18, 19). 3. Zungennadel nach Anspruch 1 oder 2, dadurch ge­kennzeichnet, daß der Zungenschlitz (8) mit seiner Längssymmetrieebene (15) um eine in Nadelschaft­längsrichtung verlaufende Achse (21) seitlich ge­kippt angeordnet ist.3. latch needle according to claim 1 or 2, characterized in that the tongue slot (8) with its longitudinal plane of symmetry (15) is arranged laterally tilted about an axis extending in the longitudinal direction of the needle shaft (21). 4. Zungennadel nach Anspruch 2 oder 3, dadurch ge­kennzeichnet, daß der Scheitel des spitzen Winkels (20, 20a) im Bereiche des Zungenschlitzes (8) liegt.4. latch needle according to claim 2 or 3, characterized in that the apex of the acute angle (20, 20a) is in the region of the tongue slot (8). 5. Zungennadel nach Anspruch 2 oder 3, dadurch ge­kennzeichnet, daß der Scheitel des spitzen Winkels (20, 20a) außerhalb des Zungenschlitzes (8) liegt.5. latch needle according to claim 2 or 3, characterized in that the apex of the acute angle (20, 20a) is outside the tongue slot (8). 6. Zungennadel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der spitze Winkel (20, 20a) im wesentlichen zwischen 0,5° und 6° liegt.6. latch needle according to one of the preceding claims, characterized in that the acute angle (20, 20a) is substantially between 0.5 ° and 6 °. 7. Zungennadel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Nadelschaft (1) im Bereiche des Übergangs zur Kehle (6) auf seiner Oberseite (7) wenigstens eine Erhebung (23) auf­weist.7. latch needle according to one of the preceding claims, characterized in that the needle shaft (1) in the region of the transition to the throat (6) on its upper side (7) has at least one elevation (23). 8. Zungennadel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Zungenschlitz (8) einen Durchbruch (10) zum Nadelrücken (9) aufweist.8. latch needle according to one of the preceding claims, characterized in that the tongue slot (8) has an opening (10) to the needle back (9).
EP90109546A 1989-06-30 1990-05-19 Latch needle for machines producing knitted fabrics Expired - Lifetime EP0405130B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3921458 1989-06-30
DE3921458A DE3921458C1 (en) 1989-06-30 1989-06-30

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EP0405130A1 true EP0405130A1 (en) 1991-01-02
EP0405130B1 EP0405130B1 (en) 1993-10-13

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EP90109546A Expired - Lifetime EP0405130B1 (en) 1989-06-30 1990-05-19 Latch needle for machines producing knitted fabrics

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US (1) US5090218A (en)
EP (1) EP0405130B1 (en)
JP (1) JPH03220349A (en)
CA (1) CA2020046C (en)
DE (2) DE3921458C1 (en)
ES (1) ES2045641T3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2220615T3 (en) * 2000-04-15 2004-12-16 Groz-Beckert Kg TONGUE NEEDLE WITH SPACE FOR IMPROVED THREAD.
DE502005003486D1 (en) * 2005-09-22 2008-05-08 Groz Beckert Kg Machine knitting needle
US7757516B1 (en) 2005-11-21 2010-07-20 Hbi Branded Apparel Enterprises, Llc Abrasive knitting needle and sinker
US7634922B2 (en) * 2005-11-21 2009-12-22 Hbi Branded Apparel Enterprises, Llc Knitting needle for knitting sueded fabrics and methods of knitting sueded fabrics
US7757515B1 (en) 2009-03-11 2010-07-20 Hbi Branded Apparel Enterprises, Llc Cut pile fabric and method of making same

Citations (2)

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Publication number Priority date Publication date Assignee Title
DE672512C (en) * 1936-10-18 1939-03-04 Dubied & Cie Sa E Knitting machine needle
DE3140386A1 (en) * 1981-10-10 1983-04-28 Theodor Groz & Söhne & Ernst Beckert Nadelfabrik KG, 7470 Albstadt "TONGUE NEEDLE FOR MACHINES FOR THE PRODUCTION OF KNITWEAR"

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Publication number Priority date Publication date Assignee Title
US1764342A (en) * 1929-07-03 1930-06-17 Gotham Knitbac Machine Corp Knitting needle
DE586678C (en) * 1932-02-21 1933-10-24 Franz Meiwald Knitting machine with latch needles
JPS6059337A (en) * 1983-09-13 1985-04-05 Fuji Xerox Co Ltd Copy magnification varying device of copying machine
JPS6217514U (en) * 1985-07-13 1987-02-02
JPS63177977U (en) * 1987-05-06 1988-11-17

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE672512C (en) * 1936-10-18 1939-03-04 Dubied & Cie Sa E Knitting machine needle
DE3140386A1 (en) * 1981-10-10 1983-04-28 Theodor Groz & Söhne & Ernst Beckert Nadelfabrik KG, 7470 Albstadt "TONGUE NEEDLE FOR MACHINES FOR THE PRODUCTION OF KNITWEAR"

Also Published As

Publication number Publication date
DE3921458C1 (en) 1990-09-27
CA2020046C (en) 1993-04-06
JPH055939B2 (en) 1993-01-25
ES2045641T3 (en) 1994-01-16
DE59003059D1 (en) 1993-11-18
EP0405130B1 (en) 1993-10-13
US5090218A (en) 1992-02-25
CA2020046A1 (en) 1990-12-31
JPH03220349A (en) 1991-09-27

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