EP0647733A1 - Latch needle for textile machines - Google Patents

Latch needle for textile machines Download PDF

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Publication number
EP0647733A1
EP0647733A1 EP94115085A EP94115085A EP0647733A1 EP 0647733 A1 EP0647733 A1 EP 0647733A1 EP 94115085 A EP94115085 A EP 94115085A EP 94115085 A EP94115085 A EP 94115085A EP 0647733 A1 EP0647733 A1 EP 0647733A1
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EP
European Patent Office
Prior art keywords
tongue
shaft
bearing bore
needle
distance
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
EP94115085A
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German (de)
French (fr)
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EP0647733B1 (en
Inventor
Kurt Wiedenhöfer
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 EP0647733A1 publication Critical patent/EP0647733A1/en
Application granted granted Critical
Publication of EP0647733B1 publication Critical patent/EP0647733B1/en
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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 tongue needle for textile machines with a needle tongue pivotally mounted in a tongue slot of the needle shaft about a tongue axis by means of a continuous bearing bore in the tongue shaft.
  • Switch needles of the type described above are used in a number of textile machines, mainly in knitting and warp knitting machines, but also e.g. in special sewing machines.
  • high demands are placed on the mounting of the tongue.
  • the load on the tongue is particularly high when dirty natural fiber yarns, e.g. OE yarns, but also elastomers are processed.
  • the tongue storage can be designed differently. It is known from EP 0 232 466 to mount the tongue on a continuous axle bolt by means of its bearing bore.
  • the axle pin is mounted in needle shaft cheek holes in which fixing elements are located as axial stops for the axle pin.
  • latch needles are also known in which the latch is pivotably mounted on two bearing journals pressed out of the material of the needle shaft cheeks (US-A-39 34 109, GB-C-836 297).
  • All of these tongue bearings are designed to prevent premature fractures of the needle shaft cheeks, while the tongue itself takes a back seat.
  • Your bearing hole is arranged in the transverse direction "in the middle" in the tongue shaft, such that the distances between the edges of the bearing hole and the tongue shaft top and bottom are approximately the same.
  • the object of the invention is to remedy this and to create a latch needle which has a longer service life than conventional latch needles with respect to the breaking strength of the latch shaft.
  • the latch needle mentioned at the outset is characterized in that the bearing bore is arranged in the tongue shaft so that the distances between the edges of the bearing hole and the tongue shaft top and bottom are different.
  • the invention can also be applied to all latch needles in which one-sided wear of the bearing bore occurs for reasons other than those described.
  • the bearing bore is located in the middle between the upper and lower side of the tongue shaft, the area of the tongue shaft that is particularly subject to wear is considerably wider in the subject of the invention, so that there is an increased resistance of the tongue without that their mobility would be hindered.
  • the distance between the edge of the bearing bore and the underside of the tongue shaft is half the distance between the edge of the bearing hole and the top of the tongue shaft.
  • the ratio of these distances is 1: 3 advantageous.
  • the latch needle shown in FIGS. 1 and 2 has a needle shaft 1 which carries a hook 2 at one end and can have one or more feet and a tracking at the other end, which cooperate in a known manner with the lock parts, for example a knitting machine and are not shown further are.
  • a tongue slot 5 is milled symmetrically to the longitudinal axis of the needle shaft 1, which receives a tongue 6.
  • the needle tongue 6 is wedge-shaped, the tip of the wedge forming a toothed tongue spoon 7 which, as can be seen in FIG. 1, rests on the hook tip 8 when the tongue 6 is closed.
  • a tongue shaft 9 connects to the tongue spoon 7.
  • the tongue shaft underside 10 together with the hook 2, limits the thread space 11 of the needle.
  • the tongue shaft top 12 lies opposite the tongue shaft bottom 10.
  • a continuous cylindrical bearing bore 13 is arranged, the axis of which is concentric with the tongue axis 14.
  • the bearing bore 13 is arranged so that there are different distances 15, 16 to the tongue shaft top 12 or bottom 10.
  • the distance 15 to the tongue shaft top 12 is approximately twice as large as the distance 16 to the tongue shaft bottom 10.
  • the ratio of the two distances 15, 16 can also be chosen differently. For many practical applications it has proven to be expedient if the (shorter) distance 16 to the underside of the tongue shaft is approximately one third of the distance 15 to the top of the tongue shaft.
  • the distance 17 between the edge of the bearing bore 13 and the end of the tongue 6, which lies opposite the tongue spoon 7, is approximately as large as the distance 15 between the edge of the bearing bore 13 and the upper side 12 of the tongue shaft. All the distances 15, 16 and 17 mentioned are approximate measured radially outwards from the edge of the bearing bore 13 in such a way that the smallest value results in each case, deviations from this rule being permitted in the case of tongue shafts of different designs.
  • the tongue slot 5 opens on the underside of the needle shaft to an opening 18 through which fluff is removed.
  • the tongue slot 5 is on the side, i.e. limited to the longitudinal axis of symmetry of the needle shaft 1 by needle shaft cheeks 19.
  • the tongue 6 is pivotally mounted with play about an axle bolt 20 forming the tongue axis 14.
  • the axle pin 20 runs through the bearing bore 13 with play and is held in bores in the needle shaft cheeks 19.
  • Fig. 1 shows the needle tongue 6 in the closed position in which its spoon 7 rests on the hook tip 8.
  • Fig. 2 the needle tongue 6 is shown in reserve. In this position, the needle tongue 6 rests on the underside of the tongue slot 5 at a point 21 on the needle shaft 1.
  • the bearing bore 13 is arranged so that the distance 16 between the edge of the bearing bore 13 and the tongue shaft bottom 10 is greater than the distance 15 between the edge of the bearing bore 13 and the tongue shaft top 12.
  • the ratio of the two distances 15, 16 to one another the same preferred values apply reciprocally as in the exemplary embodiment described, i.e. Distance 16 to distance 15 is approximately 2: 1 or 3: 1.

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

Abstract

Bei einer Zungennadel für Textilmaschinen ist die Lagerbohrung (13) im Zungenschaft (9) so angeordnet, daß die Abstände (15,16) der Berandung der Lagerbohrung und der Zungenschaftoberseite (12) bzw. -unterseite (10) unterschiedlich sind, um damit vorzeitigem Zungenschaftbruch vorzubeugen. Das Verhältnis der beiden Abstände 15, 16 zueinander liegt mit Vorzug bei ca. 1:2 oder 1:3. <IMAGE>In the case of a latch needle for textile machines, the bearing bore (13) is arranged in the tongue shaft (9) in such a way that the distances (15, 16) between the edges of the bearing hole and the tongue shaft top (12) or underside (10) are different in order to be premature To prevent tongue shaft breakage. The ratio of the two distances 15, 16 to one another is preferably approximately 1: 2 or 1: 3. <IMAGE>

Description

Die Erfindung betrifft eine Zungennadel für Textilmaschinen mit einer in einem Zungenschlitz des Nadelschaftes um eine Zungenachse mittels einer durchgehenden Lagerbohrung im Zungenschaft schwenkbar gelagerten Nadelzunge.The invention relates to a tongue needle for textile machines with a needle tongue pivotally mounted in a tongue slot of the needle shaft about a tongue axis by means of a continuous bearing bore in the tongue shaft.

Zungennadeln der eingangs beschriebenen Art werden in einer Reihe von Textilmaschinen verwendet, überwiegend in Strick- und Wirkmaschinen, aber auch z.Bsp. in Spezial-Nähmaschinen. An die Lagerung der Zunge werden dabei sowohl hinsichtlich der mechanischen Belastbarkeit, als auch der Genauigkeit der Zungenführung hohe Anforderungen gestellt. Die Belastung der Zunge ist besonders hoch, wenn in schnellaufenden Strickmaschinen verschmutzte Naturfasergarne, z.Bsp. OE Garne, aber auch Elastomere verarbeitet werden.Switch needles of the type described above are used in a number of textile machines, mainly in knitting and warp knitting machines, but also e.g. in special sewing machines. In terms of the mechanical resilience and the accuracy of the tongue guide, high demands are placed on the mounting of the tongue. The load on the tongue is particularly high when dirty natural fiber yarns, e.g. OE yarns, but also elastomers are processed.

Die Zungenlagerung kann verschieden gestaltet sein. So ist es aus der EP 0 232 466 bekannt, die Zunge mittels ihrer Lagerbohrung auf einem durchgehenden Achsbolzen zu lagern. Der Achsbolzen ist in Nadelschaftwangenbohrungen gelagert, in denen sich Fixierelemente als axiale Anschläge für den Achsbolzen befinden.The tongue storage can be designed differently. It is known from EP 0 232 466 to mount the tongue on a continuous axle bolt by means of its bearing bore. The axle pin is mounted in needle shaft cheek holes in which fixing elements are located as axial stops for the axle pin.

Es sind aber auch Zungennadeln bekannt bei denen die Zunge auf zwei aus dem Material der Nadelschaftwangen herausgedrückten Lagerzapfen schwenkbar gelagert ist (US-A- 39 34 109, GB-C- 836 297).However, latch needles are also known in which the latch is pivotably mounted on two bearing journals pressed out of the material of the needle shaft cheeks (US-A-39 34 109, GB-C-836 297).

Es gibt auch den Vorschlag (DE-A- 35 46 037) nur in einer Nadelschaftwange eine Bohrung vorzusehen und in diese einen Achsstift mit einer Länge von etwa 2/3 der Nadelschaftdicke einzupressen, der an der gegenüberliegenden Nadelschaftwange anliegt.There is also the proposal (DE-A-35 46 037) to provide a bore only in a needle shaft cheek and to press into it an axle pin with a length of about 2/3 of the needle shaft thickness, which abuts the opposite needle shaft cheek.

Bei allen diesen Zungenlagerungen geht es darum vorzeitigen Brüchen der Nadelschaftwangen vorzubeugen, während die Zunge selbst in den Hintergrund tritt. Ihre Lagerbohrung ist durchweg in Querrichtung "mittig" im Zungenschaft angeordnet, derart, daß die Abstände zwischen der Berandung der Lagerbohrung und der Zungenschaftober- und -unterseite etwa gleich sind.All of these tongue bearings are designed to prevent premature fractures of the needle shaft cheeks, while the tongue itself takes a back seat. Your bearing hole is arranged in the transverse direction "in the middle" in the tongue shaft, such that the distances between the edges of the bearing hole and the tongue shaft top and bottom are approximately the same.

Ein anderes bei Zungennadeln auftretendes Problem bleibt dabei ungelöst. Durch Reibungs- und vor allem Schlagverschleiß beim harten Aufschlagen der Zunge in der Rücklage und die daraus resultierende Hebelwirkung kommt es zum Bruch des Zungenschaftes im Bereich der Lagerbohrung, der die Lebensdauer der Nadel begrenzt.Another problem that occurs with latch needles remains unsolved. Due to friction and, above all, impact wear when the tongue hard hits the reserve and the resulting leverage, the tongue shaft breaks in the area of the bearing bore, which limits the service life of the needle.

Aufgabe der Erfindung ist es hier abzuhelfen und eine Zungennadel zu schaffen, die eine größere Lebensdauer als herkömmliche Zungennadeln in Bezug auf die Bruchfestigkeit des Zungenschaftes aufweist.The object of the invention is to remedy this and to create a latch needle which has a longer service life than conventional latch needles with respect to the breaking strength of the latch shaft.

Zur Lösung dieser Aufgabe ist die eingangs genannte Zungennadel dadurch gekennzeichnet, daß die Lagerbohrung im Zungenschaft so angeordnet ist, daß die Abstände zwischen der Berandung der Lagerbohrung und der Zungenschaftober- und -unterseite unterschiedlich sind.To solve this problem, the latch needle mentioned at the outset is characterized in that the bearing bore is arranged in the tongue shaft so that the distances between the edges of the bearing hole and the tongue shaft top and bottom are different.

Durch eingehende Lebensdaueranalysen von Zungennadeln wurde festgestellt, daß nach längerem Betrieb eine einseitige Abnutzung der Lagerbohrung zu einer Zungenschaftseite hin erfolgt; die Lagerbohrung wird "ovalisiert". Das hat zur Folge, daß der Zungenschaft im Bereich der Lagerbohrung schließlich an einer Stelle seiner Berandung bricht. Die einseitige Abnutzung erfolgt normalerweise auf der der Zungenschaftoberseite zugewandten Seite, doch kann es, abhängig von der Nadelkonstruktion, bspw. bei größerem Überstand des Zungenlöffels über die Hakenspitze auch vorkommen, daß sich die Lagerbohrung zur Unterseite des Zungenschaftes hin ausweitet.Through detailed life cycle analyzes of latch needles, it was found that after prolonged operation the bearing bore wears on one side towards one end of the latch shaft; the bearing bore is "ovalized". The result of this is that the tongue shaft finally breaks at one point in the area of the bearing bore. The one-sided wear and tear usually occurs on the side facing the tongue shaft top, but depending on the needle construction, for example if the tongue spoon protrudes beyond the hook tip, the bearing bore may expand towards the underside of the tongue shaft.

Selbstverständlich kann die Erfindung auch bei allen Zungennadeln angewendet werden, bei denen eine einseitige Abnutzung der Lagerbohrung aus anderen als den beschriebenen Gründen auftritt.Of course, the invention can also be applied to all latch needles in which one-sided wear of the bearing bore occurs for reasons other than those described.

Im Vergleich zu einer Nadelzunge, in der sich die Lagerbohrung in der Mitte zwischen der Zungenschaftober- und -unterseite befindet, ist beim Gegenstand der Erfindung der durch Verschleiß besonders belastete Bereich des Zungenschaftes erheblich breiter, so daß sich eine erhöhte Widerstandsfestigkeit der Zunge ergibt, ohne daß deren Beweglichkeit behindert würde.Compared to a needle tongue, in which the bearing bore is located in the middle between the upper and lower side of the tongue shaft, the area of the tongue shaft that is particularly subject to wear is considerably wider in the subject of the invention, so that there is an increased resistance of the tongue without that their mobility would be hindered.

Dabei erweist es sich als Vorteil, daß der Zungenschaft selbst nicht breiter als bei bekannten Nadeln ist, so daß die Masse der Zunge, die im allgemeinen so klein wie möglich sein soll, nicht erhöht ist. Ein weiterer Vorteil ist, daß zur Herstellung der neuen Nadel keine neuen Stanzwerkzeuge erforderlich sind, da sich die Kontur der Nadelschaftwangen nicht ändert.It proves to be an advantage that the tongue shaft itself is not wider than in known needles, so that the mass of the tongue, which should generally be as small as possible, is not increased. Another advantage is that no new punching tools are required to produce the new needle, since the contour of the needle shaft cheeks does not change.

In einer bevorzugten Ausführungsform der Erfindung beträgt der Abstand zwischen der Berandung der Lagerbohrung und der Zungenschaftunterseite die Hälfte des Abstandes zwischen der Berandung der Lagerbohrung und der Zungenschaftoberseite. Es gibt auch Fälle in denen das Verhältnis dieser Abstände 1:3 vorteilhaft ist.In a preferred embodiment of the invention, the distance between the edge of the bearing bore and the underside of the tongue shaft is half the distance between the edge of the bearing hole and the top of the tongue shaft. There are also cases where the ratio of these distances is 1: 3 advantageous.

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

  • Fig. 1 eine Zungennadel gemäß der Erfindung in einer Seitenansicht mit geschlossener Zunge, teilweise als axialer Längsschnitt und
  • Fig. 2 die Zungennadel aus Fig. 1 in entsprechender Darstellung mit der Zunge in Rücklage.
In the drawing, an embodiment of the object of the invention is shown. Show it:
  • Fig. 1 is a latch needle according to the invention in a side view with the tongue closed, partly as an axial longitudinal section and
  • Fig. 2, the latch needle of Fig. 1 in a corresponding representation with the tongue in reserve.

Die in Fig. 1 und 2 gezeigte Zungennadel weist einen Nadelschaft 1 auf, der einenends einen Haken 2 trägt und anderenends einen Fuß oder mehrere Füße und eine Nachführung aufweisen kann, die in bekannter Weise mit den Schloßteilen bspw. einer Strickmaschine zusammenwirken und nicht weiter dargestellt sind. In dem Nadelschaft 1 ist zwischen dem Hals 3 und der Kehle 4 symmetrisch zur Längsachse des Nadelschaftes 1 ein Zungenschlitz 5 eingefräst, der eine Zunge 6 aufnimmt.The latch needle shown in FIGS. 1 and 2 has a needle shaft 1 which carries a hook 2 at one end and can have one or more feet and a tracking at the other end, which cooperate in a known manner with the lock parts, for example a knitting machine and are not shown further are. In the needle shaft 1 between the neck 3 and the throat 4 a tongue slot 5 is milled symmetrically to the longitudinal axis of the needle shaft 1, which receives a tongue 6.

Die Nadelzunge 6 ist von keilförmiger Gestalt, wobei die Spitze des Keils einen gezaschten Zungenlöffel 7 bildet, der wie aus Fig. 1 ersichtlich, bei geschlossener Zunge 6 auf der Hakenspitze 8 aufliegt. An den Zungenlöffel 7 schließt sich ein Zungenschaft 9 an. Die Zungenschaftunterseite 10 begrenzt bei geschlossener Zunge 6 zusammen mit dem Haken 2 den Fadenraum 11 der Nadel. Die Zungenschaftoberseite 12 liegt der Zungenschaftunterseite 10 gegenüber. In dem dem Zungenlöffel 7 abgewandten Endbereich des Zungenschaftes 9 ist eine durchgängige zylindrische Lagerbohrung 13 angeordnet, deren Achse mit der Zungenachse 14 konzentrisch ist. Die Lagerbohrung 13 ist so angeordnet, daß sich unterschiedliche Abstände 15, 16 zur Zungenschaftober- 12 bzw. -unterseite 10 ergeben.The needle tongue 6 is wedge-shaped, the tip of the wedge forming a toothed tongue spoon 7 which, as can be seen in FIG. 1, rests on the hook tip 8 when the tongue 6 is closed. A tongue shaft 9 connects to the tongue spoon 7. When the tongue 6 is closed, the tongue shaft underside 10, together with the hook 2, limits the thread space 11 of the needle. The tongue shaft top 12 lies opposite the tongue shaft bottom 10. In the end region of the tongue shank 9 facing away from the tongue spoon 7, a continuous cylindrical bearing bore 13 is arranged, the axis of which is concentric with the tongue axis 14. The bearing bore 13 is arranged so that there are different distances 15, 16 to the tongue shaft top 12 or bottom 10.

Und zwar ist der Abstand 15 zur Zungenschaftoberseite 12 etwa doppelt so groß wie der Abstand 16 zur Zungenschaftunterseite 10. Abhängig von der Konstruktion der Zungennadel und deren Zunge kann das Verhältnis der beiden Abstände 15, 16 auch anders gewählt sein. Für viele praktische Anwendungsfälle hat es sich als zweckmäßig erwiesen, wenn der (kürzere) Abstand 16 zur Zungenschaftunterseite etwa ein Drittel des Abstandes 15 zur Zungenschaftoberseite beträgt.Namely, the distance 15 to the tongue shaft top 12 is approximately twice as large as the distance 16 to the tongue shaft bottom 10. Depending on the construction of the tongue needle and its tongue, the ratio of the two distances 15, 16 can also be chosen differently. For many practical applications it has proven to be expedient if the (shorter) distance 16 to the underside of the tongue shaft is approximately one third of the distance 15 to the top of the tongue shaft.

Der Abstand 17 der Berandung der Lagerbohrung 13 zu dem Ende der Zunge 6, das dem Zungenlöffel 7 gegenüberliegt, ist etwa so groß wie der Abstand 15 zwischen der Berandung der Lagerbohrung 13 und der Zungenschaftoberseite 12. Alle genannten Abstände 15, 16 und 17 sind etwa radial von der Berandung der Lagerbohrung 13 so nach außen gemessen, daß sich der jeweils kleinste Wert ergibt, wobei bei unterschiedlich ausgestalten Zungenschäften durchaus Abweichungen von dieser Regel erlaubt sind.The distance 17 between the edge of the bearing bore 13 and the end of the tongue 6, which lies opposite the tongue spoon 7, is approximately as large as the distance 15 between the edge of the bearing bore 13 and the upper side 12 of the tongue shaft. All the distances 15, 16 and 17 mentioned are approximate measured radially outwards from the edge of the bearing bore 13 in such a way that the smallest value results in each case, deviations from this rule being permitted in the case of tongue shafts of different designs.

Der Zungenschlitz 5 öffnet sich auf der Nadelschaftunterseite zu einem Durchbruch 18, durch den Flusen abgeführt werden. Der Zungenschlitz 5 ist seitlich, d.h. quer zur Symmetrielängsachse des Nadelschaftes 1 von Nadelschaftwangen 19 begrenzt. In dem Zungenschlitz 5 ist die Zunge 6 um einen die Zungenachse 14 bildenden Achsbolzen 20 mit Spiel schwenkbar gelagert. Der Achsbolzen 20 verläuft mit Spiel durch die Lagerbohrung 13 und ist in Bohrungen in den Nadelschaftwangen 19 gehaltert.The tongue slot 5 opens on the underside of the needle shaft to an opening 18 through which fluff is removed. The tongue slot 5 is on the side, i.e. limited to the longitudinal axis of symmetry of the needle shaft 1 by needle shaft cheeks 19. In the tongue slot 5, the tongue 6 is pivotally mounted with play about an axle bolt 20 forming the tongue axis 14. The axle pin 20 runs through the bearing bore 13 with play and is held in bores in the needle shaft cheeks 19.

Fig. 1 zeigt die Nadelzunge 6 in der geschlossenen Stellung, in der ihr Löffel 7 auf der Hakenspitze 8 aufliegt.Fig. 1 shows the needle tongue 6 in the closed position in which its spoon 7 rests on the hook tip 8.

In Fig. 2 ist die Nadelzunge 6 in Rücklage dargestellt. In dieser Position liegt die Nadelzunge 6 an der Unterseite des Zungenschlitzes 5 an einer Stelle 21 auf dem Nadelschaft 1 auf.In Fig. 2 the needle tongue 6 is shown in reserve. In this position, the needle tongue 6 rests on the underside of the tongue slot 5 at a point 21 on the needle shaft 1.

Kommt die Nadelzunge in Rücklage, so schlägt sie an der Stelle 21 auf den Nadelschaft 1 hart auf, was wegen der Hebelwirkung zu einer hohen Beanspruchung des Zungenschaftes 9 in dem Bereich zwischen der Lagerbohrung 13 und der Zungenschaftoberseite 12 führt.If the needle tongue comes into reserve, it hits the needle shaft 1 hard at point 21, which, due to the leverage effect, leads to high stress on the tongue shaft 9 in the area between the bearing bore 13 and the tongue shaft top 12.

Es kann auch Fälle geben, in denen der erhöhte Verschleiß des Zungenschaftes 9 zwischen der Lagerbohrung 13 und der Zungenschaftunterseite 10 erfolgt, was bspw. bei Nadeln mit großem Zungenvorsprung denkbar ist. In solchen Fällen wird die Lagerbohrung 13 so angeordnet, daß der Abstand 16 zwischen der Berandung der Lagerbohrung 13 und der Zungenschaftunterseite 10 größer als der Abstand 15 zwischen der Berandung der Lagerbohrung 13 und der Zungenschaftoberseite 12 ist. Bezüglich des Verhältnisses der beiden Abstände 15, 16 zueinander gelten dann reziprok die gleichen bevorzugten Werte wie bei dem beschriebenen Ausführungsbeispiel, d.h. Abstand 16 zu Abstand 15 ist etwa 2:1 bzw. 3:1.There may also be cases in which the increased wear of the tongue shaft 9 takes place between the bearing bore 13 and the tongue shaft underside 10, which is conceivable, for example, for needles with a large tongue projection. In such cases, the bearing bore 13 is arranged so that the distance 16 between the edge of the bearing bore 13 and the tongue shaft bottom 10 is greater than the distance 15 between the edge of the bearing bore 13 and the tongue shaft top 12. With regard to the ratio of the two distances 15, 16 to one another, the same preferred values apply reciprocally as in the exemplary embodiment described, i.e. Distance 16 to distance 15 is approximately 2: 1 or 3: 1.

Claims (5)

Zungennadel für Textilmaschinen mit einer in einem Zungenschlitz des Nadelschaftes um eine Zungenachse mittels einer durchgehenden Lagerbohrung im Zungenschaft schwenkbar gelagerten Nadelzunge, dadurch gekennzeichnet, daß die Lagerbohrung (13) im Zungenschaft (9) so angeordnet ist, daß die Abstände (15, 16) zwischen der Berandung der Lagerbohrung (13) und der Zungenschaftoberseite (12) bzw.-unterseite (10) unterschiedlich sind.Tongue needle for textile machines with a needle tongue pivotally mounted in a tongue slot of the needle shaft about a tongue axis by means of a continuous bearing bore in the tongue shaft, characterized in that the bearing bore (13) is arranged in the tongue shaft (9) so that the distances (15, 16) between the edges of the bearing bore (13) and the tongue shaft top (12) or bottom (10) are different. Zungennadel nach Anspruch 1 dadurch gekennzeichnet, daß der Abstand (15) zwischen der Berandung der Lagerbohrung (13) und der Zungenschaftoberseite (12) größer ist als der Abstand (16) zwischen der Berandung der Lagerbohrung (13) und der Zungenschaftunterseite (10).Latch needle according to claim 1, characterized in that the distance (15) between the edge of the bearing bore (13) and the tongue shaft top (12) is greater than the distance (16) between the edge of the bearing hole (13) and the tongue shaft bottom (10). Zungennadel nach den Anspruch 2, dadurch gekennzeichnet, daß der Abstand (15) zwischen der Berandung der Lagerbohrung (13) und der Zungenschaftoberseite (12) etwa das Doppelte bis das Dreifache des Abstandes (16) zwischen der Berandung der Lagerbohrung (13) und der Zungenschaftunterseite (10) beträgt.Latch needle according to claim 2, characterized in that the distance (15) between the edge of the bearing bore (13) and the tongue shaft top (12) is approximately twice to three times the distance (16) between the edge of the bearing bore (13) and the Tongue shaft underside (10). Zungennadel nach Anspruch 1 dadurch gekennzeichnet, daß der Abstand (15) zwischen der Berandung der Lagerbohrung (13) und der Zungenschaftoberseite (12) kleiner ist als der Abstand (16) zwischen der Berandung der Lagerbohrung (13) und der Zungenschaftunterseite (10).Tongue needle according to claim 1, characterized in that the distance (15) between the edge of the bearing bore (13) and the tongue shaft upper side (12) is smaller than the distance (16) between the edge of the bearing bore (13) and the tongue shaft underside (10). Zungennadel nach Anspruch 4, dadurch gekennzeichnet, daß der Abstand (15) zwischen der Berandung der Lagerbohrung (13) und der Zungenschaftoberseite (12) etwa die Hälfte bis ein Drittel des Abstandes (16) zwischen der Berandung der Lagerbohrung (13) und der Zungenschaftunterseite (10) beträgt.Tongue needle according to claim 4, characterized in that the distance (15) between the edge of the bearing bore (13) and the upper side of the tongue shaft (12) is approximately half to one third of the distance (16) between the edges of the bearing bore (13) and the underside of the tongue shaft (10).
EP94115085A 1993-10-06 1994-09-24 Latch needle for textile machines Expired - Lifetime EP0647733B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4334051A DE4334051C1 (en) 1993-10-06 1993-10-06 Latch needle for textile machines
DE4334051 1993-10-06

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Publication Number Publication Date
EP0647733A1 true EP0647733A1 (en) 1995-04-12
EP0647733B1 EP0647733B1 (en) 1998-04-01

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EP94115085A Expired - Lifetime EP0647733B1 (en) 1993-10-06 1994-09-24 Latch needle for textile machines

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10341630B4 (en) * 2003-09-10 2006-11-16 Groz-Beckert Kg latch needle
DE102004049061B4 (en) 2004-10-08 2006-08-24 Groz-Beckert Kg latch needle
EP1731651B1 (en) 2005-06-09 2010-04-21 Groz-Beckert KG Latch needle for textile machines

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1040974A (en) * 1950-08-01 1953-10-20 Knitting needle
US3934109A (en) * 1972-06-23 1976-01-20 The Torrington Company Latch pivot for latch needle
DE3546037A1 (en) * 1985-03-14 1986-09-18 Ulrich Dipl.-Ing. 7470 Albstadt Hofmann Method for the production of the latch support in knitting-machine needles
EP0232466A1 (en) * 1986-01-11 1987-08-19 Theodor Groz &amp; Söhne &amp; Ernst Beckert Nadelfabrik Commandit-Gesellschaft Latch needle for textile machines

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE616441C (en) * 1932-02-05 1935-07-29 Hosiery Developments Ltd Knitting needle with several tongues arranged one below the other
GB836297A (en) * 1958-01-23 1960-06-01 Torrington Co Improvements in or relating to bearings for latch knitting needles
JPH0223619A (en) * 1988-07-12 1990-01-25 Seiko Epson Corp Manufacture of semiconductor device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1040974A (en) * 1950-08-01 1953-10-20 Knitting needle
US3934109A (en) * 1972-06-23 1976-01-20 The Torrington Company Latch pivot for latch needle
DE3546037A1 (en) * 1985-03-14 1986-09-18 Ulrich Dipl.-Ing. 7470 Albstadt Hofmann Method for the production of the latch support in knitting-machine needles
EP0232466A1 (en) * 1986-01-11 1987-08-19 Theodor Groz &amp; Söhne &amp; Ernst Beckert Nadelfabrik Commandit-Gesellschaft Latch needle for textile machines

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CA2133709C (en) 1999-01-26
US5488840A (en) 1996-02-06
JP2983852B2 (en) 1999-11-29
ES2114106T3 (en) 1998-05-16
CA2133709A1 (en) 1995-04-07
EP0647733B1 (en) 1998-04-01
DE4334051C1 (en) 1995-02-16
JPH07150451A (en) 1995-06-13
DE59405571D1 (en) 1998-05-07

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