EP0231435B1 - Latch needle for a textile machine, and method for manufacturing it - Google Patents

Latch needle for a textile machine, and method for manufacturing it Download PDF

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Publication number
EP0231435B1
EP0231435B1 EP86114373A EP86114373A EP0231435B1 EP 0231435 B1 EP0231435 B1 EP 0231435B1 EP 86114373 A EP86114373 A EP 86114373A EP 86114373 A EP86114373 A EP 86114373A EP 0231435 B1 EP0231435 B1 EP 0231435B1
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EP
European Patent Office
Prior art keywords
bore
needle
latch
longitudinal slot
shaft
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP86114373A
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German (de)
French (fr)
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EP0231435A1 (en
Inventor
Sigmar Majer
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Groz Beckert KG
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Theodor Groz and Soehne and Ernst Beckert Nadelfabrik KG
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Publication of EP0231435A1 publication Critical patent/EP0231435A1/en
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    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04BKNITTING
    • D04B35/00Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/02Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
    • D04B35/04Latch needles

Definitions

  • the invention relates to a latch needle for textile machines with a pivotable tongue in a longitudinal slot of the needle shaft, which is pivotably mounted on two coaxial stub axles by means of a continuous bearing bore, which are arranged projecting into the longitudinal slot on the needle shaft cheeks laterally delimiting the longitudinal slot.
  • the invention also relates to a method for producing such a latch needle.
  • Tongue needles of this type are used in various textile machines, in particular in knitting and knitting machines, but also, for example, in special sewing machines.
  • latch needles of this type which are used in practice to a large extent today, the two stub axles projecting laterally into the longitudinal slot are formed by parts pressed out of the two needle shaft cheeks and deformed into the tongue hole in the manner of bearing journals, which are integrally formed on the needle shaft cheeks.
  • Examples of latch needles with this type of latch mounting can be found, for example, in US Pat. No. 3,934,109 and GB Pat. No. 836,297. Because the two bearing journals have no fixed connection with one another and at most touch in the end of the tongue bore, the tongue bearing is given a certain elasticity, which has proven to be advantageous in terms of reducing the occurrence of fractures of the needle shaft cheeks.
  • latch needles are also known, in which the tongue is supported by a one-piece, cylindrical axle pin or bolt which, crossing the longitudinal slot of the needle shaft, lies with its two ends in corresponding coaxial bores in the shaft cheeks with which it is screwed or by laser welding is rigidly connected (DE-PS-1 296 734).
  • Tongue needles the tongue of which are mounted on such a separately manufactured, exactly cylindrical, continuous axle bolt, which is inserted into a corresponding transverse bore in the shaft cheeks, have an excellent tongue guide in terms of accuracy and wear resistance due to the precisely machined cylindrical outer surface of the smooth axle bolt, but they are these latch needles are almost insignificant today, because the rigid axle bearing arrangement which is caused by the continuous axle bolt and which is completely inelastic transversely to the axis of symmetry of the needle results in fractures of the needle shaft cheeks at high, in particular also dynamic, needle loading, which undesirably limits the service life of these needles.
  • the object of the invention is therefore to provide a latch needle which is economically producible in mass production and is distinguished by low-wear storage and a narrow bearing clearance of the latch and thus retains its full suitability for use even over long operating periods, with the risk of breakage occurring at the same time the needle shaft cheeks are eliminated or reduced to a minimum.
  • each of the stub axles in the form of its own cylindrical bolt is inserted into a through bore of the associated shaft cheek with a tight fit and is fixed in such a manner that it cannot move.
  • the diameter of the tongue bore can be approximated to the stub axles which have the same diameter, for example + 0.001 mm and less diameter difference, an extremely narrow tongue bearing clearance can be achieved both axially and radially.
  • the tongue thus receives very precise guidance, so that it does not deviate significantly from the axis of symmetry of the needle even after a long period of operation and reliably lies on the hook during the closing process.
  • the tongue bearing Since the two stub axles are not connected to one another at the end, the tongue bearing has at the same time such a great elasticity transversely to the axis of symmetry of the needle that jaw fractures are permanently prevented.
  • the axial distance between the adjacent end faces of the stub axles in the tongue bore should be at least approx. 0.01 mm. Experiments have shown, however, that when the needle thickness falls below certain needle thicknesses, there is sufficient elasticity even when the two stub axles are arranged abutting one another at the end.
  • the two stub axles are expediently fixed in the region of their end faces facing away from the longitudinal slot in the bore, for which purpose they can be welded, for example, to the shaft cheeks, in particular by laser welding.
  • the stub axles are fixed by deformations of the material of the respective shaft cheek that surrounds the bore and projecting into the bore. Such deformations can be produced by an embossing process.
  • the arrangement can be such that the stub axles are only supported in the area of the bores of the shaft cheeks which extends to approximately half the length of the bore and is adjacent to the longitudinal slot, so that the remaining free part of the bores is available for fixing the stub axles.
  • an annular material bead protruding into the free bore part is arranged, which is formed from the material of the respective shaft cheek surrounding the bore.
  • the material bead can be arranged at a distance from the adjacent end face of the associated stub shaft, so that it only prevents the stub shaft from migrating out of the bore under the action of the tongue movement, but in any case an impairment of the elasticity of the tongue bearing is definitely excluded.
  • a tongue needle can be done in a particularly simple, rational and precise manner according to the invention in that, starting from an unslit needle shaft in the needle shaft, a transverse bore which is coaxial with the tongue pivot axis is first arranged, and then a continuous cylindrical bolt with a close fit is inserted into the transverse bore and then the longitudinal slot is worked into the needle shaft by dividing the bolt, and that after the tongue is subsequently inserted into the longitudinal slot, the bolt parts remaining in the two needle shaft cheeks which laterally delimit the longitudinal slot as stub axles. inserted into the bearing bore of the tongue and finally fixed securely in the bore of the shaft cheeks.
  • the bolt inserted into the transverse bore can protrude on both sides beyond the needle shaft by a length corresponding to at most half the width of the later longitudinal slot, and after insertion of the bolt parts they are essentially flush on the outside with the needle shaft side parts.
  • the two bolt parts can also be inserted by means of pressing tools which reach into the bore of the shaft cheeks and have such a length that they lie in the inserted state with their outer end faces within the respective bore.
  • the material of the shaft cheeks surrounding the bore of the shaft cheeks can then be plastically deformed, whereby in a preferred embodiment the material of the shaft cheeks is each deformed into an annular bead protruding into the respective hole, which is optionally at an axial distance from the adjacent end face of the associated bolt part is.
  • a cylindrical bore 11 coaxial to the pivot axis 9 is present in the manner shown in particular in FIGS. 2, 3, into which a stub shaft 12 formed in the form of its own cylindrical bolt with a tight fit (Press fit) is inserted such that it projects into the bearing bore of the tongue shaft 7 engaging in the longitudinal slot 2.
  • the two coaxial, cylindrical stub axles 12 have an axial distance 13 of at least 0.01 mm on their mutually facing parallel end faces.
  • the tongue 4 with its bearing bore 8 is mounted with a small amount of play, a diameter difference of + 0.001 mm and less being present.
  • the tongue shaft 7 is precisely guided with little play between the parallel surfaces of the needle shaft cheeks 10 delimiting the longitudinal slot 2.
  • the two cylindrical stub axles 12 are securely fixed in the respective bore 11 of the associated needle shaft cheek 10:
  • the stub axles 12 are only supported in the area of the bores 11 of the needle shaft cheeks 10 which extends to approximately half the length of the bore and is adjacent to the longitudinal slot 2.
  • deformations 14 projecting into the bore 11 are formed, which preferably have the shape of an annular bead and prevent axial displacement of the stub shaft 12 toward the outside of the shaft cheek.
  • annular bead individual finger or tooth-like impressions protruding into the bore 11 or corresponding deformations of the shaft cheek material can also be present for fixation.
  • the annular bead 14 or the corresponding impressions or deformations can, as shown in FIG. 2, be arranged directly on the adjacent end face of the respective adjacent stub shaft 12.
  • the arrangement can, however, also advantageously be made such that there is an axial distance from the adjacent end face, which then, as indicated by dashed lines in FIG. 2, runs at 12a.
  • FIG. 3 corresponds essentially to that of FIG. 2; The same parts are therefore provided with the same reference symbols and are not explained again.
  • the two coaxial, cylindrical stub axles 12 are fixed in the associated bore by welding - preferably by means of a laser beam.
  • the weld seam or spot is indicated at 15 in each case.
  • a cylindrical bore 11 a which is coaxial with the tongue pivot axis 9, is first produced in the needle shaft 1 a, for example by punching, the diameter of which corresponds to the diameter corresponds to the two stub axles 12.
  • a cylindrical bolt 120 (FIG. 5) or 120a (FIG. 8) with a tight fit is then pressed into the continuous transverse bore 11 a, the bolt length in FIG. 5 the thickness of the needle shaft 1 a and in FIG. 8 approximately the first , Corresponds to 25 times the shaft thickness. Accordingly, the inserted bolt 120 in FIG. 5 is flush with the needle shaft side surfaces, while the bolt 120a in FIG. 8 protrudes over the needle shaft side surfaces by a corresponding amount, which, however, corresponds to at most half the width of the later longitudinal slot 2.
  • the longitudinal slot 2 is milled into the needle shaft according to FIG. 6 or FIG. 9, the bolt 120 or 120a being simultaneously milled through and thus divided into the two stub axles 12.
  • the needle tongue 4 is inserted with its shaft 7 into the longitudinal slot 2 in such a way that its bearing bore 8 lies coaxially with the pivot axis 9, whereupon the two pin locations forming the stub shaft 12 are pushed axially from both sides towards the plane of symmetry of the needle and thus into the Bearing bore 8 of the tongue shaft 7 are inserted.
  • the two stub axles 12 can, as already noted, either have the small distance 13 (FIG. 2), or alternatively they can also abut one another on the end face.
  • the two inserted stub axles 12 are fixed in the bore 11 of the needle side cheeks 10 separated from one another by the longitudinal slot 2 in the manner shown in FIG. 2 or 3 either by the stamped annular bead 14 or by welding at 15 so that they cannot move.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Rolling Contact Bearings (AREA)

Description

Die Erfindung betrifft eine Zungennadel für Textilmaschinen mit einer in einem Längsschlitz des Nadelschaftes verschwenkbaren Zunge, die mittels einer durchgehenden Lagerbohrung auf zwei koaxialen Achsstummeln schwenkbar gelagert ist, welche an den den Längsschlitz seitlich begrenzenden Nadelschaftwangen in den Längsschlitz vorragend angeordnet sind. Außerdem bezieht sich die Erfindung auf ein Verfahren zur Herstellung einer solchen Zungennadel.The invention relates to a latch needle for textile machines with a pivotable tongue in a longitudinal slot of the needle shaft, which is pivotably mounted on two coaxial stub axles by means of a continuous bearing bore, which are arranged projecting into the longitudinal slot on the needle shaft cheeks laterally delimiting the longitudinal slot. The invention also relates to a method for producing such a latch needle.

Zungennadeln dieser Art werden in verschiedenen Textilmaschinen, insbesondere in Strick-und Wirkmaschinen, aber auch bspw. in Spezial-Nähmaschinen, verwendet.Tongue needles of this type are used in various textile machines, in particular in knitting and knitting machines, but also, for example, in special sewing machines.

Bei heute in großem Umfang praktisch benutzten Zungennadeln dieser Art sind die beiden in den Längsschlitz seitlich vorragenden Achsstummel durch aus den beiden Nadelschaftwangen herausgedrückte und in das Zungenloch hinein verformte Teile nach Art von Lagerzapfen gebildet, die an den Nadelschaftwangen einstückig angeformt sind. Beispiele für Zungennadeln mit dieser Art der Zungenlagerung finden sich bspw. in der US-PS-3 934 109 und der GB-PS-836 297. Dadurch, daß die beiden Lagerzapfen keine feste Verbindung miteinander besitzen und sich in der Zungenbohrung allenfalls stirnseitig berühren, erhält das Zungenlager eine gewisse Elastizität, die sich im Hinblick auf eine Verminderung des Auftretens von Brüchen der Nadelschaftwangen als günstig erwiesen hat. Andererseits hat sich aber in der Praxis erwiesen, daß sich das in die Zungenbohrung hinein verdrängte Material der Seitenwangen durch sein nicht vorhersehbares Fließverhalten in seiner Form nur unvollkommen der Gestalt der Zungenbohrung anzupassen vermag, so daß sich tatsächlich mehr oder minder große Abweichungen von der theoretischen Zylinderform der Achsstummel ergeben. Tatsächlich ist selbst bei einer fabrikneuen Zungennadel der Flächentraganteil der Nadelzungenbohrung auf den durch solche durch einen Prägevorgang an den Nadelschaftwangen angeformten Lagerzapfen verhältnismäßig gering. Mit zunehmender Betriebsdauer ergibt sich daraus die Gefahr für den Ausfall der Nadel dadurch, daß wegen des auftretenden Verschleißes der Zungenführungsfläche auf den beiden nur sehr unvollkommen einer Zylinderform entsprechenden Lagerzapfen das Zungenlagerspiel so vergrößert wird, daß die Zunge bei ihrer Schließbewegung mit ihrem freien Ende den Nadelhaken verfehlt oder seitlich von diesem abgleitet, womit die Nadel unbrauchbar wird. Auch die bekannte Maßnahme (bspw. US-PS-3 934 109), die die Achsstummel bildenden, an die Schaftwangen angeformten, geprägten Lagerzapfen bspw. mit einem stark focussierten Laserstrahl an ihrer Stirnseite zusammenzuschweißen, schaffte keine Abhilfe dieses Problems, das insbesondere dann an Bedeutung gewinnt, wenn solche Zungennadeln in schnellaufenden Strickmaschinen arbeiten oder robuste Garne zu verstricken haben, d.h. an die Lagerung der Zunge sehr hohe Anforderungen nicht nur in Bezug auf die Genauigkeit der Zungenführung, sondern auch auf mechanische Belastbarkeit gestellt werden.With latch needles of this type which are used in practice to a large extent today, the two stub axles projecting laterally into the longitudinal slot are formed by parts pressed out of the two needle shaft cheeks and deformed into the tongue hole in the manner of bearing journals, which are integrally formed on the needle shaft cheeks. Examples of latch needles with this type of latch mounting can be found, for example, in US Pat. No. 3,934,109 and GB Pat. No. 836,297. Because the two bearing journals have no fixed connection with one another and at most touch in the end of the tongue bore, the tongue bearing is given a certain elasticity, which has proven to be advantageous in terms of reducing the occurrence of fractures of the needle shaft cheeks. On the other hand, however, it has been shown in practice that the material of the side cheeks displaced into the tongue bore can only incompletely adapt its shape to the shape of the tongue bore due to its unpredictable flow behavior, so that in fact more or less large deviations from the theoretical cylindrical shape the stub axle result. In fact, even in the case of a brand-new latch needle, the area bearing portion of the needle latch bore on the bearing journal formed by such a stamping process on the needle shaft cheeks is relatively small. With increasing operating time, the risk of the needle failing arises from the fact that, due to the wear of the tongue guide surface on the two bearing journals, which only correspond incompletely to a cylindrical shape, the tongue bearing play is increased so that the tongue, with its free end, closes the needle hook during its closing movement is missing or slides off to the side, making the needle unusable. Even the known measure (for example US Pat. No. 3,934,109), which welds the stub axles which form the stub axles and are molded onto the shaft cheeks, for example using a strongly focused laser beam on the end face, did not remedy this problem, in particular then Gaining importance when such latch needles work in high-speed knitting machines or when knitting robust yarns, ie Very high demands are placed on the storage of the tongue, not only in terms of the accuracy of the tongue guidance, but also in terms of mechanical strength.

Daneben sind auch Zungennadeln bekannt, bei denen die Lagerung der Zunge durch einen einstückigen, zylindrischen Achsstift oder -bolzen erfolgt, der den Längsschlitz des Nadelschaftes überquerend mit seinen beiden Enden in entsprechenden koaxialen Bohrungen der Schaftwangen liegt, mit denen er bspw. verschraubt oder durch Laserschweißung starr verbunden ist (DE-PS-1 296 734). Zungennadeln, deren Zunge auf einem solchen getrennt gefertigten, genau zylindrischen, durchgehenden Achsbolzen gelagert sind, der in eine entsprechende Querbohrung der Schaftwangen eingefügt ist, weisen zwar wegen der genau bearbeiteten zylindrischen Mantelfläche des glatten Achsbolzens eine bezüglich Genauigkeit und Verschleißfestigkeit hervorragende Zungenführung auf, doch sind diese Zungennadeln heute nahezu bedeutungslos, weil die durch den durchgehenden Achsbolzen bedingte starre und quer zur Nadelsymmetrieachse völlig unelastische Zungenlageranordnung bei hoher, insbesondere auch dynamischer Nadelbelastung Brüche der Nadelschaftwangen zur Folge hat, durch die die Lebensdauer dieser Nadeln in unerwünschtem Maße begrenzt ist.In addition, latch needles are also known, in which the tongue is supported by a one-piece, cylindrical axle pin or bolt which, crossing the longitudinal slot of the needle shaft, lies with its two ends in corresponding coaxial bores in the shaft cheeks with which it is screwed or by laser welding is rigidly connected (DE-PS-1 296 734). Tongue needles, the tongue of which are mounted on such a separately manufactured, exactly cylindrical, continuous axle bolt, which is inserted into a corresponding transverse bore in the shaft cheeks, have an excellent tongue guide in terms of accuracy and wear resistance due to the precisely machined cylindrical outer surface of the smooth axle bolt, but they are these latch needles are almost insignificant today, because the rigid axle bearing arrangement which is caused by the continuous axle bolt and which is completely inelastic transversely to the axis of symmetry of the needle results in fractures of the needle shaft cheeks at high, in particular also dynamic, needle loading, which undesirably limits the service life of these needles.

Daneben ist es auch bekannt (DE-PS-215 749), den Achsbolzen auf einer Seite in einem Sackloch der zugeordneten Nadelschaftwange zu lagern und ihn auf der anderen Seite in der Querbohrung der entsprechenden Nadelschaftwange durch Verschweißen zu sichern. Damit ist zwar eine gewisse Elastizität der Zungenlagerung gegeben, doch ist diese beschränkt, abgesehen davon, daß die Herstellung dieser Nadeln aufwendig ist, so daß sie für eine Massenproduktion nicht geeignet ist.In addition, it is also known (DE-PS-215 749) to store the axle bolt on one side in a blind hole of the associated needle shaft cheek and to secure it on the other side in the transverse bore of the corresponding needle shaft cheek by welding. Although there is a certain elasticity of the tongue bearing, this is limited, apart from the fact that the production of these needles is complex, so that it is not suitable for mass production.

Aufgabe der Erfindung ist es deshalb, eine Zungennadel zu schaffen, die in Massenproduktion wirtschaftlich herstellbar ist und sich durch eine verschleißarme Lagerung und ein enges Lagerspiel der Zunge auszeichnet und damit auch über lange Betriebszeiträume ihre volle Gebrauchstauglichkeit behält, wobei gleichzeitig die Gefahr des Auftretens von Brüchen der Nadelschaftwangen beseitigt bzw. auf ein Minimum reduziert ist.The object of the invention is therefore to provide a latch needle which is economically producible in mass production and is distinguished by low-wear storage and a narrow bearing clearance of the latch and thus retains its full suitability for use even over long operating periods, with the risk of breakage occurring at the same time the needle shaft cheeks are eliminated or reduced to a minimum.

Zur Lösung dieser Aufgabe ist die eingangs genannte Zungennadel erfindungsgemäß dadurch gekennzeichnet, daß jeder der in Gestalt eines eigenen zylindrischen Bolzens ausgebildete Achsstummel in eine durchgehende Bohrung der zugeordneten Schaftwange mit enger Passung eingesteckt und in dieser verschiebesicher fixiert ist.To achieve this object, the latch needle mentioned at the outset is characterized according to the invention in that each of the stub axles in the form of its own cylindrical bolt is inserted into a through bore of the associated shaft cheek with a tight fit and is fixed in such a manner that it cannot move.

Durch die glatten, genau zylindrischen Mantelflächen der beiden Achsstummel ergibt sich im Zusammenwirken mit einem der Breite des Längsschlitzes genau anpaßbaren Zungenschaft ein größtmöglicher Flächentraganteil zwischen der Lagerachse und der Zungenbohrung, wodurch die spezifische Drehlager-Flächenbelastung entsprechend minimiert wird, was zu einer Erhöhung der Verschleißfestigkeit des Zungenlagers führt. Da der Zungenbohrungsdurchmesser den im Durchmesser gleichbleibenden Achsstummeln auf bspw. + 0,001 mm und weniger Durchmesserdifferenz angenähert werden kann, läßt sich ein äußerst enges Zungenlagerspiel sowohl axial als auch radial erreichen. Die Zunge erhält damit eine sehr präzise Führung, so daß sie auch nach längerer Betriebsdauer in ihrer Schwenkbewegung nicht nennenswert von der Nadelsymmetrieachse abweicht und sich beim Schließvorgang zuverlässig auf den Haken legt. Da die beiden Achsstummel stirnseitig miteinander unverbunden sind, weist die Zungenlagerung gleichzeitig eine so große Elastizität quer zur Nadelsymmetrieachse auf, daß Backenbrüchen dauerhaft vorgebeugt ist. Der axiale Abstand der benachbarten Stirnflächen der Achsstummel in der Zungenbohrung sollte wenigstens ca. 0,01 mm betragen. Versuche haben aber gezeigt, daß bei Unterschreiten bestimmter Nadeldicken eine ausreichende Elastizität der Zungenlagerung auch schon dann gegeben ist, wenn die beiden Achsstummel stirnseitig aneinander anstoßend angeordnet sind.The smooth, precisely cylindrical outer surfaces of the two stub axles, in combination with a tongue shank that can be precisely adjusted to the width of the longitudinal slot, result in the greatest possible area bearing area between the bearing axis and the tongue bore, thereby creating the specific pivot bearing surface is minimized accordingly, which leads to an increase in the wear resistance of the tongue bearing. Since the diameter of the tongue bore can be approximated to the stub axles which have the same diameter, for example + 0.001 mm and less diameter difference, an extremely narrow tongue bearing clearance can be achieved both axially and radially. The tongue thus receives very precise guidance, so that it does not deviate significantly from the axis of symmetry of the needle even after a long period of operation and reliably lies on the hook during the closing process. Since the two stub axles are not connected to one another at the end, the tongue bearing has at the same time such a great elasticity transversely to the axis of symmetry of the needle that jaw fractures are permanently prevented. The axial distance between the adjacent end faces of the stub axles in the tongue bore should be at least approx. 0.01 mm. Experiments have shown, however, that when the needle thickness falls below certain needle thicknesses, there is sufficient elasticity even when the two stub axles are arranged abutting one another at the end.

Die beiden Achsstummel sind zweckmäßigerweise im Bereiche ihrer dem Längsschlitz abgewandten Stirnseiten in der Bohrung fixiert, wozu sie bspw. mit den Schaftwangen insbesondere durch Laserschweißung verschweißt sein können. Als besonders vorteilhaft hat es sich aber erwiesen, wenn die Achsstummel durch in die Bohrung hineinragende Verformungen des die Bohrung umgebenden Materials der jeweiligen Schaftwange fixiert sind. Solche Verformungen können durch einen Prägevorgang hergestellt sein.The two stub axles are expediently fixed in the region of their end faces facing away from the longitudinal slot in the bore, for which purpose they can be welded, for example, to the shaft cheeks, in particular by laser welding. However, it has proven to be particularly advantageous if the stub axles are fixed by deformations of the material of the respective shaft cheek that surrounds the bore and projecting into the bore. Such deformations can be produced by an embossing process.

Die Anordnung kann dabei derart getroffen sein, daß die Achsstummel lediglich in dem etwa bis zur Hälfte der Bohrungslänge reichenden, dem Längsschlitz benachbarten Bereich der Bohrungen der Schaftwangen gelagert sind, so daß der verbleibende freie Teil der Bohrungen für die Fixierung der Achsstummel zur Verfügung steht. Dabei ist in einer bevorzugten Ausführungsform in der Nähe des dem Längsschlitz abgewandten Endes jedes Achsstummels ein in den freien Bohrungsteil hineinragender ringförmiger Materialwulst angeordnet, der aus dem die Bohrung umgebenden Material der jeweiligen Schaftwange geformt ist. Der Materialwulst kann im Abstand zu der benachbarten Stirnfläche des zugeordneten Achsstummels angeordnet sein, so daß er lediglich ein Herauswandern der Achsstummel aus der Bohrung unter der Wirkung der Zungenbewegung verhindert, eine Beeinträchtigung der Elastizität der Zungenlagerung aber auf jeden Fall sicher ausgeschlossen ist.The arrangement can be such that the stub axles are only supported in the area of the bores of the shaft cheeks which extends to approximately half the length of the bore and is adjacent to the longitudinal slot, so that the remaining free part of the bores is available for fixing the stub axles. In a preferred embodiment, in the vicinity of the end of each axle stub facing away from the longitudinal slot, an annular material bead protruding into the free bore part is arranged, which is formed from the material of the respective shaft cheek surrounding the bore. The material bead can be arranged at a distance from the adjacent end face of the associated stub shaft, so that it only prevents the stub shaft from migrating out of the bore under the action of the tongue movement, but in any case an impairment of the elasticity of the tongue bearing is definitely excluded.

Die Herstellung einer solchen Zungenadel kann in besonders einfacher, rationeller und präziser Weise erfindungsgemäß dadurch geschehen, daß ausgehend von einem ungeschlitzten Nadelschaft in dem Nadelschaft zunächst eine mit der Zungenschwenkachse koaxiale Querbohrung angeordnet wird, daß sodann in die Querbohrung ein durchgehender zylindrischer Bolzen mit enger Passung eingefügt und anschließend der Längsschlitz unter Abteilen des Bolzens in den Nadelschaft eingearbeitet wird, und daß nach dem darauffolgenden Einlegen der Zunge in den Längsschlitz die in den beiden den Längsschlitz seitlich begrenzenden Nadelschaftwangen verbleibenden Bolzenteile als Achsstummel beid. seitig in die Lagerbohrung der Zunge eingeschoben und schließlich in der Bohrung der Schaftwangen verschiebesicher fixiert werden.The manufacture of such a tongue needle can be done in a particularly simple, rational and precise manner according to the invention in that, starting from an unslit needle shaft in the needle shaft, a transverse bore which is coaxial with the tongue pivot axis is first arranged, and then a continuous cylindrical bolt with a close fit is inserted into the transverse bore and then the longitudinal slot is worked into the needle shaft by dividing the bolt, and that after the tongue is subsequently inserted into the longitudinal slot, the bolt parts remaining in the two needle shaft cheeks which laterally delimit the longitudinal slot as stub axles. inserted into the bearing bore of the tongue and finally fixed securely in the bore of the shaft cheeks.

Der in die Querbohrung eingefügte Bolzen kann dabei beidseitig über den Nadelschaft um eine höchstens der Hälfte der Breite des späteren Längsschlitzes entsprechende Länge vorstehen, wobei nach dem Einschieben der Bolzenteile diese außen mit den Nadelschaftseitenteilen im wesentlichen bündig sind. Die beiden Bolzenteile können auch mittels in die Bohrung der Schaftwangen greifender Preßwerkzeuge eingeschoben werden und eine solche Länge aufweisen, daß sie im eingeschobenen Zustand mit ihren außenliegenden Stirnflächen innerhalb der jeweiligen Bohrung liegen. Zur Fixierung der Bolzenteile kann dann das die Bohrung der Schaftwangen umgebende Material der Schaftwangen plastisch verformt werden, wobei bei einer bevorzugten Ausführungsform das Material der Schaftwangen jeweils zu einem in die jeweilige Bohrung hineinragenden Ringwulst verformt wird, der gegebenenfalls im axialen Abstand zu der benachbarten Stirnseite des zugehörigen Bolzenteils liegt.The bolt inserted into the transverse bore can protrude on both sides beyond the needle shaft by a length corresponding to at most half the width of the later longitudinal slot, and after insertion of the bolt parts they are essentially flush on the outside with the needle shaft side parts. The two bolt parts can also be inserted by means of pressing tools which reach into the bore of the shaft cheeks and have such a length that they lie in the inserted state with their outer end faces within the respective bore. To fix the bolt parts, the material of the shaft cheeks surrounding the bore of the shaft cheeks can then be plastically deformed, whereby in a preferred embodiment the material of the shaft cheeks is each deformed into an annular bead protruding into the respective hole, which is optionally at an axial distance from the adjacent end face of the associated bolt part is.

In der Zeichnung sind Ausführungsbeispiele des Gegenstandes der Erfindung dargestellt. Es zeigen:

  • Fig. 1 eine Zungennadel gemäß der Erfindung, teilweise im Längsschnitt, in einer Seitenansicht und im Ausschnitt,
  • Fig. 2 die Zungennadel nach Fig. 1, geschnitten längs der Linie A - B der Fig. 1, in einer Seitenansicht und in einem anderen Maßstab,
  • Fig. 3 die Zungennadel nach Fig. 1, in einer abgewandelten Ausführungsform, geschnitten längs der Linie A - B der Fig. 1, in einer Seitenansicht und in einem anderen Maßstab,
  • Fig. 4 - 7 die Zungennadel nach Fig. 1, jeweils geschnitten längs der Linie A - B der Fig. 1, in einer Seitenansicht und in einem anderen Maßstab, unter Veranschaulichung von vier aufeinanderfolgenden Zuständen bei der Herstellung, und
  • Fig. 8 - 10 die Zungenadel nach Fig. 1, geschnitten längs der Linie A - B der Fig. 1, in einer Seitenansicht und in einem anderen Maßstab, unter Veranschaulichung von drei aufeinanderfolgenden Zuständen bei der Herstellung.
Die in Fig. 1 dargestellte Zungennadel weist einen Nadelschaft 1 auf, an den einenends ein Haken 20 angeformt ist und der wenigstens einen nicht weiter dargestellten Fuß zur Steuerung der Nadel über bekannte Schloßteile, bspw. einer Strickmaschine, aufweisen kann. In den Nadelschaft 1 ist ein zur Nadellängsachse symmetrischer Längsschlitz 2 eingefräst, der sich über einen Durchbruch 3 der Nadelschaftunterkante öffnet und in dem eine Nadelzunge 4 schwenkbar angeordnet ist, die mit einem Zungenlöffel 5 in der dargestellten geschlossenen Stellung eine Nadelspitze 6 überdeckt. Die Nadelzunge 4 weist im Schaft 7 in der Nähe ihres dem Zungenlöffel 5 abgewandten Endes eine durchgehende zylindrische Lagerbohrung 8 auf, die zu ihrer schwenkbaren Lagerung dient. Die querverlaufende Schwenkachse ist bei 9 angedeutet.Exemplary embodiments of the subject matter of the invention are shown in the drawing. Show it:
  • 1 is a latch needle according to the invention, partly in longitudinal section, in a side view and in a detail,
  • 2, the latch needle according to FIG. 1, cut along the line A - B of FIG. 1, in a side view and on a different scale,
  • 3, the latch needle according to FIG. 1, in a modified embodiment, cut along the line A - B of FIG. 1, in a side view and on a different scale,
  • 4 - 7 the latch needle of FIG. 1, each cut along the line A - B of FIG. 1, in a side view and on a different scale, illustrating four successive states in the manufacture, and
  • Fig. 8-10 the latch needle of Fig. 1, cut along the line A - B of Fig. 1, in a side view and on a different scale, illustrating three successive states in the manufacture.
The latch needle shown in FIG. 1 has a needle shaft 1, on one end of which a hook 20 is formed and which can have at least one foot, not shown, for controlling the needle via known lock parts, for example a knitting machine. A longitudinal slot 2, which is symmetrical to the longitudinal axis of the needle, is milled into the needle shaft 1 and opens via an opening 3 in the lower edge of the needle shaft and in which a needle tongue 4 is pivotably arranged and covers a needle tip 6 with a tongue spoon 5 in the closed position shown. The needle tongue 4 has a continuous cylindrical bearing bore 8 in the shaft 7 in the vicinity of its end facing away from the tongue spoon 5, which serves for its pivotable mounting. The transverse pivot axis is indicated at 9.

In jeder der den Längsschlitz 2 seitlich begrenzenden Nadelschaftwangen 10 ist in der insbesondere aus den Fig. 2, 3 ersichtlichen Weise eine zu der Schwenkachse 9 koaxiale, zylindrische Bohrung 11 vorhanden, in die ein in Gestalt eines eigenen zylindrischen Bolzens ausgebildeter Achsstummel 12 mit enger Passung (Preßsitz) derart eingefügt ist, daß er in-die Lagerbohrung des Zungenschaftes 7 eingreifend in den Längsschlitz 2 vorragt. Die beiden koaxialen, zylindrischen Achsstummel 12 weisen an ihren einander zugewandten parallelen Stirnflächen einen axialen Abstand 13 von wenigstens 0,01 mm auf.In each of the needle shaft cheeks 10 which laterally delimit the longitudinal slot 2, a cylindrical bore 11 coaxial to the pivot axis 9 is present in the manner shown in particular in FIGS. 2, 3, into which a stub shaft 12 formed in the form of its own cylindrical bolt with a tight fit (Press fit) is inserted such that it projects into the bearing bore of the tongue shaft 7 engaging in the longitudinal slot 2. The two coaxial, cylindrical stub axles 12 have an axial distance 13 of at least 0.01 mm on their mutually facing parallel end faces.

Auf den glatten Mantelflächen der beiden koaxialen, zylindrischen Achsstummel 12 ist die Zunge 4 mit ihrer Lagerbohrung 8 mit kleinem Spiel gelagert, wobei eine Durchmesserdifferenz von + 0,001 mm und weniger vorhanden ist. Der Zungenschaft 7 ist zwischen den den Längsschlitz 2 begrenzenden parallelen Flächen der Nadelschaftwangen 10 mit geringem Spiel präzise geführt.On the smooth lateral surfaces of the two coaxial, cylindrical stub axle 12, the tongue 4 with its bearing bore 8 is mounted with a small amount of play, a diameter difference of + 0.001 mm and less being present. The tongue shaft 7 is precisely guided with little play between the parallel surfaces of the needle shaft cheeks 10 delimiting the longitudinal slot 2.

Die beiden zylindrischen Achsstummel 12 sind in der jeweiligen Bohrung 11 der zugeordneten Nadelschaftwange 10 verschiebesicher fixiert:The two cylindrical stub axles 12 are securely fixed in the respective bore 11 of the associated needle shaft cheek 10:

Bei der Ausführungsform nach Fig. 2 sind die Achsstummel 12 lediglich in dem etwa bis zur Hälfte der Bohrungslänge reichenden, dem Längsschlitz 2 benachbarten Bereich der Bohrungen 11 der Nadelschaftwangen 10 gelagert. In dem die Bohrung 11 umgebenden Material jeder Nadelschaftwange 10 sind in die Bohrung 11 hineinragende Verformungen 14 ausgebildet, die vorzugsweise die Gestalt eines Ringwulstes aufweisen und ein axiales Verschieben der Achsstummel 12 zur Schaftwangenaußenseite hin verhindern. Anstelle eines Ringwulstes können auch einzelne finger- oder zahnartig in die Bohrung 11 vorragende Einprägungen oder entsprechende Verformungen des Schaftwangenmaterials zur Fixierung vorhanden sein.In the embodiment according to FIG. 2, the stub axles 12 are only supported in the area of the bores 11 of the needle shaft cheeks 10 which extends to approximately half the length of the bore and is adjacent to the longitudinal slot 2. In the material surrounding the bore 11 of each needle shaft cheek 10, deformations 14 projecting into the bore 11 are formed, which preferably have the shape of an annular bead and prevent axial displacement of the stub shaft 12 toward the outside of the shaft cheek. Instead of an annular bead, individual finger or tooth-like impressions protruding into the bore 11 or corresponding deformations of the shaft cheek material can also be present for fixation.

Der Ringwulst 14 oder die entsprechenden Einprägungen bzw. Verformungen können, wie in Fig. 2 dargestellt, unmittelbar an der benachbarten Stirnfläche des jeweils benachbarten Achsstummels 12 angeordnet sein. Die Anordnung kann aber mit Vorteil auch derart getroffen sein, daß ein axialer Abstand zu der benachbarten Stirnfläche vorhanden ist, die dann, wie in Fig. 2 gestrichelt angedeutet, bei 12a verläuft.The annular bead 14 or the corresponding impressions or deformations can, as shown in FIG. 2, be arranged directly on the adjacent end face of the respective adjacent stub shaft 12. The arrangement can, however, also advantageously be made such that there is an axial distance from the adjacent end face, which then, as indicated by dashed lines in FIG. 2, runs at 12a.

Die Ausführungsform nach Fig. 3 entspricht im wesentlichen jener nach Fig. 2; gleiche Teile sind deshalb mit gleichen Bezugszeichen versehen und nicht nochmals erläutert. Im Unterschied zu der Ausführungsform nach Fig. 2 sind hier die beiden koaxialen, zylindrischen Achsstummel 12 in der zugeordneten Bohrung durch Schweißung - vorzugsweise mittels eines Laserstrahls - fixiert. Die Schweißnaht oder -stelle ist jeweils bei 15 angedeutet.The embodiment of FIG. 3 corresponds essentially to that of FIG. 2; The same parts are therefore provided with the same reference symbols and are not explained again. In contrast to the embodiment according to FIG. 2, the two coaxial, cylindrical stub axles 12 are fixed in the associated bore by welding - preferably by means of a laser beam. The weld seam or spot is indicated at 15 in each case.

Die Herstellung der Zungennadel nach Fig. 1 kann - soweit es die Zungenlagerung anbelangt - in besonders einfacher und präziser Weise in der in den Fig. 4 - 7 oder, leicht abgewandelt, in der in den Fig. 8 - 10 veranschaulichten Weise geschehen:1 - as far as the tongue mounting is concerned - can be produced in a particularly simple and precise manner in the manner shown in FIGS. 4-7 or, slightly modified, in the manner illustrated in FIGS. 8-10:

Ausgehend von einem Nadelrohling mit einem noch ungeschlitzten Nadelschaft 1 a, wie er in den Fig. 4 und 8 dargestellt ist, wird in dem Nadelschaft 1a zunächst eine zu der Zungenschwenkachse 9 koaxiale zylindrische Bohrung 11 a bspw. durch Ausstanzen hergestellt, deren Durchmesser dem Durchmesser der beiden Achsstummel 12 entspricht. In die durchgehende Querbohrung 11 a wird sodann ein zylindrischer Bolzen 120 (Fig. 5) oder 120a (Fig. 8) mit enger Passung eingedrückt, wobei die Bolzenlänge in Fig. 5 der Dicke des Nadelschaftes 1 a und in Fig. 8 etwa dem 1,25-fachen der Schaftdicke entspricht. Demgemäß ist der eingesteckte Bolzen 120 in Fig. 5 mit den Nadeischaftseitenfiächen bündig, während der Bolzen 120a in Fig. 8 über die Nadelschaftseitenflächen um einen entsprechenden Betrag vorsteht, der aber höchstens der Hälfte der Breite des späteren Längsschlitzes 2 entspricht.Starting from a needle blank with a still unslotted needle shaft 1 a, as shown in FIGS. 4 and 8, a cylindrical bore 11 a, which is coaxial with the tongue pivot axis 9, is first produced in the needle shaft 1 a, for example by punching, the diameter of which corresponds to the diameter corresponds to the two stub axles 12. A cylindrical bolt 120 (FIG. 5) or 120a (FIG. 8) with a tight fit is then pressed into the continuous transverse bore 11 a, the bolt length in FIG. 5 the thickness of the needle shaft 1 a and in FIG. 8 approximately the first , Corresponds to 25 times the shaft thickness. Accordingly, the inserted bolt 120 in FIG. 5 is flush with the needle shaft side surfaces, while the bolt 120a in FIG. 8 protrudes over the needle shaft side surfaces by a corresponding amount, which, however, corresponds to at most half the width of the later longitudinal slot 2.

Anschließend wird in den Nadelschaft entsprechend Fig. 6 bzw. Fig. 9 der Längsschlitz 2 eingefräst, wobei gleichzeitig der Bolzen 120 bzw. 120a mit durchgefräst und damit in die beiden Achsstummel 12 unterteilt wird.Subsequently, the longitudinal slot 2 is milled into the needle shaft according to FIG. 6 or FIG. 9, the bolt 120 or 120a being simultaneously milled through and thus divided into the two stub axles 12.

Sodann wird die Nadelzunge 4 mit ihrem Schaft 7 in den Längsschlitz 2 derart eingelegt, daß ihre Lagerbohrung 8 koaxial zu der Schwenkachse 9 liegt, worauf die beiden die Achsstummel 12 bildenden Bolzentelle von beiden Seite her zur Symmetrieebene der Nadel hin axial vorgeschoben und damit in die Lagerbohrung 8 des Zungenschaftes 7 eingeschoben werden. Im eingeschobenen Zustand können die beiden Achsstummel 12, wie bereits vermerkt, entweder den kleinen Abstand 13 (Fig. 2) aufweisen, oder alternativ auch stirnseitig aneinander anliegen.Then the needle tongue 4 is inserted with its shaft 7 into the longitudinal slot 2 in such a way that its bearing bore 8 lies coaxially with the pivot axis 9, whereupon the two pin locations forming the stub shaft 12 are pushed axially from both sides towards the plane of symmetry of the needle and thus into the Bearing bore 8 of the tongue shaft 7 are inserted. In the inserted state, the two stub axles 12 can, as already noted, either have the small distance 13 (FIG. 2), or alternatively they can also abut one another on the end face.

Während bei der Ausführungsform nach den Fig. 8 -10 die beiden Achsstummel 12 im eingeschobenen Zustand (Fig. 10) mit ihren nach außen weisenden Stirnflächen mit den Nadelschaftseitenflächen bündig sind, erfolgt bei der Ausführungsform nach den Fig. 4 - 7 das Einschieben der Achsstummel 12 mittels eines nicht weiter dargestellten, in die Bohrung 11 jeweils eingreifenden Preßwerkzeugs, derart, daß die nach außen weisenden Stirnflächen der beiden Achsstummel 12 in dem sich etwa bis zur Hälfte der Bohrungslänge reichenden Teil in der Nähe des Längsschlitzes 2 gelagert sind.While in the embodiment according to FIGS. 8-10 the two axle stubs 12 are flush with the needle shaft side faces in the inserted state (FIG. 10) with their outwardly facing end faces, in the embodiment according to FIGS. 4-7 the axle stubs are pushed in 12 by means of a not further shown, each engaging in the bore 11, such that the outwardly facing end faces of the two stub axles 12 are mounted in the part extending to about half the length of the bore near the longitudinal slot 2.

Schließlich werden die beiden eingeschobenen Achsstummel 12 in der Bohrung 11 der durch den Längsschlitz 2 voneinander getrennten Nadelseitenwangen 10 in der aus Fig. 2 oder 3 ersichtlichen Weise entweder durch den eingeprägten Ringwulst 14 oder durch Verschweißen bei 15 verschiebesicher fixiert.Finally, the two inserted stub axles 12 are fixed in the bore 11 of the needle side cheeks 10 separated from one another by the longitudinal slot 2 in the manner shown in FIG. 2 or 3 either by the stamped annular bead 14 or by welding at 15 so that they cannot move.

Claims (14)

1. A latch needle for textile machines, having a latch which can be pivoted in a longitudinal slot in the needle shaft and is pivotably borne by means of a continuous bearing bore on two coaxial axle stubs which are disposed projecting into the longitudinal slot on the needle shaft cheeks laterally bounding the longitudinal slot, characterized in that each of the axle stubs (12), constructed in the form of a separate cylindrical pin, is inserted with a close fit into a continuous bore (11) in the associated shaft cheek (10) and is fixed in such a bore secured against displacement.
2. A latch needle according to claim 1, characterized in that the two axle stubs (12) are disposed to abut one another at their end faces.
3. A latch needle according to claim 1, characterized in that the adjacent end faces of the two axle stubs (12) are spaced at a minimum distance of 0.01 mm from one another.
4. A latch needle according to one of the preceding claims, characterized in that the two axle stubs (12) are fixed in the bore (11) in the zone of their end faces remote from the longitudinal slot (2).
5. A latch needle according to claim 4, characterized in that the two axle stubs (12) are welded to the shaft cheeks (10), more particularly by laser welding.
6. A latch needle according to claim 4, characterized in that the two axle stubs (12) are each fixed by deformations (14) extending into the bore (11) of the material of the needle shaft cheek (12) which encloses the bore (11).
7. A latch needle according to one of the preceding claims, characterized in that the two axle stubs (12) are mounted solely in that zone of the bores (11) in the needle shaft cheeks (10) which adjoins the longitudinal slot (2) and extends as far as about half the bore length.
8. A latch needle according to claims 6 and 7, characterized in that disposed adjacent the end of each axle stub (12) remote from the longitudinal slot (2) is an annular bead (14) of material which extends into the unobstructed part of the bore and is formed from the material of the particular needle shaft cheek (10) enclosing the bore (11).
9. A latch needle according to claim 8, characterized in that the bead (14) of material is disposed at a distance from the adjacent end face (12a) of the associated axle stub (12).
10. A method of producing a latch needle according to one of the preceding claims, characterized in that starting from an unslotted needle shaft, firstly a transverse bore coaxial with the pivoting axis of the latch is made in the needle shaft; a continuous cylindrical pin is then inserted with a close fit into the transverse bore, whereafter the longitudinal slot is produced in the needle shaft, the pin being divided; and following the subsequent insertion of the latch into the longitudinal slot, the pin portions remaining in the two needle shaft cheeks laterally bounding the longitudinal slot are inserted as axle stubs on both sides into the bearing bore of the latch and finally fixed secured against displacement in the bore in the needle shank cheeks.
11. A method according to claim 10, characterized in that the pin inserted into the transverse bore projects on both sides beyond the needle shaft by a length corresponding at most to half the width of the subsequent longitudinal slot, and after the pin portions have been inserted they are substantially flush with the lateral surface of the needle shank on the outside.
12. A method according to claim 10, characterized in that the two pin portions are each inserted by means of pressing tools engaging in the bore of the shaft cheeks and have a length such that in the inserted condition they are disposed with their outwardly pointing end faces inside the bore.
13. A method according to claim 12, characterized in that for the fixing of the pin portions, the material of the needle shaft cheeks enclosing the bore therein is plastically deformed.
14. A method according to claim 13, characterized in that the material of the needle shaft cheeks is in each case deformed to produce an annular bead which extends into the bore and if necessary is disposed at an axial distance from the adjacent end face of the associated pin portion.
EP86114373A 1986-01-11 1986-10-17 Latch needle for a textile machine, and method for manufacturing it Expired - Lifetime EP0231435B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3600620A DE3600620C1 (en) 1986-01-11 1986-01-11
DE3600620 1986-01-11

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EP0231435A1 EP0231435A1 (en) 1987-08-12
EP0231435B1 true EP0231435B1 (en) 1990-01-17

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EP86114373A Expired - Lifetime EP0231435B1 (en) 1986-01-11 1986-10-17 Latch needle for a textile machine, and method for manufacturing it

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US (1) US4747277A (en)
EP (1) EP0231435B1 (en)
JP (1) JPS62162057A (en)
KR (1) KR890001495B1 (en)
CN (1) CN1004561B (en)
CA (1) CA1269857A (en)
DE (2) DE3600620C1 (en)
ES (1) ES2012333B3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3800802C1 (en) * 1988-01-14 1989-02-16 Theodor Groz & Soehne & Ernst Beckert Nadelfabrik Kg, 7470 Albstadt, De
JPH0265731U (en) * 1988-11-08 1990-05-17
DD284925A5 (en) * 1989-06-12 1990-11-28 ��������@��������@����������@���k�� LATCH NEEDLE
US5697773A (en) * 1994-08-23 1997-12-16 Denticator International, Inc. Rotary fluid reaction device having hinged vanes
DE10341630B4 (en) * 2003-09-10 2006-11-16 Groz-Beckert Kg latch needle
EP2224048B1 (en) * 2009-02-26 2011-08-31 Groz-Beckert KG Latch needle with rotating axle pin
PT2604359T (en) * 2011-12-14 2017-07-24 Groz Beckert Kg Latch needle with improved latch bearing and its method of manufacturing
CN112251903A (en) * 2020-09-28 2021-01-22 宋悦 Knitting needle structure of textile machine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE215749C (en) *
DE608619C (en) * 1935-01-28 Torrington Co Method of manufacturing knitting machine needles
US1794309A (en) * 1922-09-30 1931-02-24 Marx Richard Knitting needle and method of making same
US1961624A (en) * 1931-06-15 1934-06-05 Torrington Co Latch needle and method of making the same
GB836297A (en) * 1958-01-23 1960-06-01 Torrington Co Improvements in or relating to bearings for latch knitting needles
GB1142409A (en) * 1966-06-21 1969-02-05 Groz & Soehne Theodor A latch needle for knitting machines
DE1296734B (en) * 1967-12-18 1969-06-04 Groz & Soehne Theodor Latch needle for knitting machines
DE1906892A1 (en) * 1969-02-12 1970-05-14
US3850011A (en) * 1972-06-23 1974-11-26 Torrington Co Latch pivot for latch needle
US3934109A (en) * 1972-06-23 1976-01-20 The Torrington Company Latch pivot for latch needle

Also Published As

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US4747277A (en) 1988-05-31
ES2012333B3 (en) 1990-03-16
JPS62162057A (en) 1987-07-17
DE3600620C1 (en) 1987-02-12
CA1269857A (en) 1990-06-05
EP0231435A1 (en) 1987-08-12
JPH0253539B2 (en) 1990-11-19
KR890001495B1 (en) 1989-05-04
DE3668334D1 (en) 1990-02-22
CN87100050A (en) 1987-07-22
KR870007322A (en) 1987-08-18
CN1004561B (en) 1989-06-21

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