EP1645670B1 - Latch needle - Google Patents
Latch needle Download PDFInfo
- Publication number
- EP1645670B1 EP1645670B1 EP05019520A EP05019520A EP1645670B1 EP 1645670 B1 EP1645670 B1 EP 1645670B1 EP 05019520 A EP05019520 A EP 05019520A EP 05019520 A EP05019520 A EP 05019520A EP 1645670 B1 EP1645670 B1 EP 1645670B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tongue
- needle
- latch
- spring
- sawslot
- 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.)
- Not-in-force
Links
- 210000000481 breast Anatomy 0.000 claims description 16
- 238000009940 knitting Methods 0.000 claims description 7
- 210000002105 tongue Anatomy 0.000 description 163
- 238000004049 embossing Methods 0.000 description 11
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002421 finishing Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21G—MAKING NEEDLES, PINS OR NAILS OF METAL
- B21G1/00—Making needles used for performing operations
- B21G1/02—Making needles used for performing operations of needles with eyes, e.g. sewing-needles, sewing-awls
- B21G1/04—Making needles used for performing operations of needles with eyes, e.g. sewing-needles, sewing-awls of needles specially adapted for use in machines or tools
-
- 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, in particular a machine knitting needle, with spring-supported tongue.
- tongue needles have always been used to facilitate a simple stitch formation process.
- a latch needle is for example from the U.S. Patent 3,453,845 known.
- the latch needle has a shaft, on the end of which a hook and in front of the hook a tongue slot are formed.
- a tongue which serves to open and close the hook, protrudes with one end into the tongue slot and is pivotally mounted there. She can swing into a closed position in which she rests with her spoon on the tip of the hook. To open the hook, it can pivot in reserve, where it is as far as possible pivoted away from the hook and rests against the shaft or at least close to this.
- the tongue slot is generally continuous, ie it is open to the back of the needle. Regardless, accumulating in the tongue slot dirt can affect the function of the latch needle.
- a tongue needle known whose tongue slot is designed to reduce the tendency to fouling in a special way.
- the tongue slot widens starting from a constriction both to the needle breast and the needle back.
- the extension concerns both the needle longitudinal direction and the transverse direction.
- tongue needles with spring-loaded tongue have been developed. Such a reveals the DE-AS 1113537 ,
- the latch needle has a tongue slot which widens toward the needle face with respect to the shaft longitudinal direction. Towards the back of the needle, the tongue slot is delimited parallelflankig. At the needle breast to be pointed narrow diverging surfaces of the tongue slot spring bearing pockets are formed for receiving the ends of a tongue spring formed as a tongue spring.
- the tongue spring is inserted from the Nadelbrustseite forth in the tongue slot and threaded by means of an auxiliary tool, which is inserted into the tongue slot in its desired target position. It then lies with its underside against the spring bearing pockets and with its upper side against the end of the tongue.
- the tongue slot must be relatively spacious to allow threading the tongue spring.
- the tongue spring is only moderately secured in the spring bearing pockets in the depth of the tongue slot. It may happen that the tongue spring slips and / or lost and the needle no longer works properly.
- a tongue-needle with tongue slot known, the tongue slot opens to both the needle breast and the needle back.
- a tongue is pivotally mounted and arranged a tongue spring.
- the tongue spring is secured at its end facing away from the tongue by pins in the shaft. The opposite free end abuts the tongue when it is in reserve.
- the one-sided storage of tongue springs is critical for very fine needle.
- the slightest mispositioning of the pins used for storage can lead to a misalignment of the tongue spring and thus to a malposition of the tongue in reserve.
- the EP 1 233 092 A1 a tongue-button with a tongue slot, which is open to the needle's breast and the needle back.
- the tongue slot widens towards the needle's breast.
- a tongue is pivotally mounted and arranged a tongue spring. This is taken at its two ends in corresponding bearings of the tongue slot.
- the corresponding bearing points can be regarded as pockets for receiving the respective end of the tongue spring.
- the pockets open towards the needle's breast, in particular FIG. 7 this document shows.
- the latch needle according to the invention has a tongue slot, which expands toward the needle back preferably with respect to the needle longitudinal direction and, if necessary, additionally in the transverse direction.
- a tongue spring is arranged in the widening region of the tongue slot.
- Corresponding spring bearing pockets thus open towards the back of the needle.
- the tongue spring can thus be first inserted from the needle back forth simply in the tongue slot and then secured, for example by an embossing process. A bending of the tongue spring during insertion, such as in the DE-AS 1113537 , is not required.
- the latch needle can therefore be manufactured in high precision with tight manufacturing tolerances.
- the new needle configuration has significant manufacturing advantages.
- the flared in the direction of the needle back tongue slot in the form of a downwardly open funnel has the advantage that the tendency for dirt deposits in the tongue slot is significantly reduced and that in the case of deposits this easily by the tongue movement from the downwardly open Funnel can be eliminated.
- slot length at the needle back including possibly existing spring bearing pockets is at least as large as the length of the relaxed tongue spring.
- latch needles In the case of prior art latch needles, it may occasionally occur that the tongue spring slips or falls completely out of the latch needle. If this occurs, proper function of the latch needle is unlikely to be possible. It has been shown that the latch needle according to the invention with the tongue spring side tongue spring is much less sensitive to the loss or misalignment of the tongue spring. The latch needle according to the invention allow the achievement of very high knitting speeds and also have a high reliability.
- the tongue spring can serve to define preferred tongue positions.
- the tongue then has corresponding, the preferred positions defining contact surfaces, which are designed as flat surfaces.
- the tongue spring is preferably formed substantially stretched. It can also be completely straight.
- the tongue spring may also have a more or less curved, adapted to the end of the tongue spring portion and this adjacent curved portions to push the tongue, for example, only from their end positions and otherwise to brake frictionally. Also for such tongue springs, the inventive concept presented here is suitable.
- the tongue spring is preferably held positively in the tongue slot.
- a stop may be formed by embossing or similar accumulation of material or lateral crush points, which the spring bearing pockets to narrow the needle back.
- the advantage of this form of attachment is that they allow a limited axial mobility of the tongue spring and thus a longitudinal clearance, so that the tongue spring can move limited in bending in the spring bearing pockets.
- Another advantage of this form of attachment is that the spring force, which is exerted by the tongue spring on the tongue, can be influenced by the arrangement or the position of the embossing points.
- the tongue spring can also be otherwise secured, for example by laser welding. It can also be mixed forms are used, in which the tongue spring materially connected at one end to the shaft, for example, welded, and is secured form-fitting manner with its other end.
- the tongue slot which widens toward the needle back can expand in addition to the needle breast. Its measured in needle length direction shortest point is then between the needle breast and needle back.
- the slot length at the needle face can be sized so that the tongue slot is completely or at least almost completely covered by the tongue towards the needle interior when the tongue is in the closed position. This reduces the ingress of dirt into the tongue slot. There is almost no gap through which dirt from the closed hook interior could get out into the tongue slot.
- the slot end may form a limit to the pivotal movement of the tongue.
- a contact surface for the tongue be educated at the end of the tongue slot. The position of the contact surface is preferably dimensioned such that the tongue bears straight against the contact surface, even if the tongue spoon hits the point of the hook.
- the abutment surface is displaced slightly back against this position, so that the spoon of the tongue can rest on the hook tip, wherein the tongue just barely touches the abutment surface at the end of the tongue slot.
- This configuration has the advantage that the contact surface does not interfere with the correct closing of the hook by the tongue, even with unavoidable production tolerances.
- partially worn latch needles can still be knitted safely, which significantly increases the life of such latch needles.
- a shortening of the tongue slot in the region of the hook on the needle breast side lead to a stiffening of the shaft, whereby the latch needle is stable in the region of the slot.
- the guidance of the tongue in the tongue slot can be improved, whereby lesser demands are placed on the bearing means of the tongue. This can be formed for example by pushed out of the side walls pin or half pin.
- the length of the tongue slot on the side of the needle is dimensioned such that the tongue located in the reserve can abut on the shaft.
- an additional recess for receiving the spoon formed on the tongue can be provided at the end of the tongue slot.
- Such recesses and shapes no longer interfere with the spring attachment, ie, for example, the spring bearing pockets.
- FIG. 1 a latch needle 1 is illustrated, which can be used primarily as a machine knitting needle or in a similar form as a knitting needle or the like.
- the latch needle 1 has a basic body 2 delimited by two flat sides, from which a shaft 3 extends away.
- the shaft 3 carries at its free end a hook 4, whose tip 5 faces the base body 2.
- the hook 4 of the latch needle 1 and from its foot 6 narrow side of the base body 2 and the shaft 3 forms the needle back 7.
- the in FIG. 1 upper narrow side of the shaft 3 forms at least in the immediate vicinity of the hook 4, a needle breast 8.
- the shaft 3 is provided with a tongue slot 9, which is characterized by the in FIG. 2 illustrated longitudinal section becomes visible.
- the tongue slot 9 serves to receive one end of a tongue 11, wherein it is pivotally supported by a bearing device 12.
- the bearing device is formed by a bearing means 13, for example a bearing journal, which engages through a tongue hole 14 formed in the end of the tongue 11.
- the tongue 11 is pivotable back and forth so that they rest with their spoon 15 on the hook tip 5 or can be pivoted in reserve.
- On the base body 2 further elements may be formed or fixed, such as a laterally mounted cap spring 16 which is connected to the flat side of the base body 2 and having a resilient finger, the tip of which bears against the shaft 3 under bias.
- the bearing means 13 of the bearing device 12 may be divided into two half-pins 13 a, 13 b, which from the tongue slot 9 limiting Side cheeks of the shaft 3 are pressed inwardly to form in the tongue hole 14 cross-projections.
- FIG. 2 illustrated by dashed lines several pivot positions of the tongue 11.
- the tongue slot 9 expands, in particular FIG. 2 as well as the FIGS. 3 and 4 show, towards the needle back 7 out. It is bounded at its axially front and axially rear end in each case by narrow surfaces 17, 18, which diverge away from each other, ie, with each other form an angle which is in FIG. 2 opens down. If the surfaces 17, 18 are curved, the center of their radius of curvature is preferably below the needle back 7.
- the tongue spring 22 has, as FIG. 5 or 6 can recognize, for example, a nearly round cross section or alternatively also a rectangular cross section. It is made of spring material, such as spring steel, formed and substantially stretched. It is located with a central, preferably flat, region at the located in the tongue slot 9 end of the tongue 11 and that preferably under bias. On the tongue 11 can here contact surfaces 23, 24 are formed, the stable supine position of the tongue 11 (FIG. FIG. 4 ) or one of the closed position ( FIG. 3 ) stabilize adjacent layer.
- the spring bearing pockets 19, 21 are substantially open towards the needle back 9.
- the tongue spring 22 is located with its ends 25, 26 in these spring bearing pockets 19, 21, wherein each substantially parallel, transversely to the needle longitudinal direction directed end faces 27, 28 of the spring bearing pockets 19, 21 from each other have a distance which is slightly larger than the length of Tongue spring 22.
- the spring bearing pockets 19, 21 are closed towards the needle back 7, for example by embossing points 29, 31.
- the embossing points can also be replaced by, for example, laser-generated Anschmelzache or the like.
- lateral crush zones 29a may be formed instead of embossing points 29, in which the shaft 3 is compressed laterally directly to the needle back to close the spring bearing pocket 19. The same applies to the spring bearing pocket 21. It can, as shown, and various measures are combined to close the spring bearing pockets. In addition, embossing points can be additionally attached to the pinching zones 29a.
- the spring bearing pocket 19 has two embossments 29 which are formed on the two mutually parallel side edges of the spring bearing pocket 19 and facing each other to reduce the clear width between the two side edges of the needle back 7.
- the tongue slot 9 can likewise expand with respect to the needle longitudinal direction. This applies in particular to the side away from the hook 4 page.
- an enlarged slot area 32 can join the tongue slot, which, like FIG. 4 illustrated, allows the transfer of the tongue 11 in an abutment position in which the tongue 11 contacts the shaft 3. This position is in FIG. 4 shown in phantom for the tongue 11.
- the stable return position of the tongue 11, in which the tongue 11 abuts with its contact surface 23 on the tongue spring 22, is in FIG. 4 marked with a continuous line.
- the tongue slot 9 is preferably dimensioned so long or short in terms of its axial length and the position of its hook-side end needle side, that the tongue 11 almost closes the tongue slot 9 in the closed position.
- FIG. 2 illustrated in a first dashed line I of the tongue 11, the stable, the hook 4 adjacent rest position of the tongue 11. It lies the contact surface 24 on the tongue spring 22 at. Starting from this position, the tongue 11 can be pressed against the hook 4 or the hook tip 5 until the spoon 15 of the tongue 11 rests with its inside against the hook 4. This position is in FIG. 2 Marked as position II, wherein the tongue 11 is again shown in dashed lines.
- a new concept of a latch needle 1 is based on a rear attachment of the tongue spring 22 in the tongue slot 9 of the latch needle 1.
- the latch needle 1 has for this purpose from the needle back 7 forth accessible spring bearing pockets 19, 21 or other suitable for receiving the ends 25, 26 of the tongue spring 22 suitable structures.
- the Federlagertaschenl9, 21 are closed to the needle back 7 at least so far that the ends 25, 26 of the tongue spring 22 are positively held or at least captive in the spring bearing pockets 19, 21.
- This latch needle shows a reduced tolerance sensitivity in the production.
- the presented needle concept allows further improvements, which meet the reliability and longevity of the latch needle.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Knitting Machines (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Description
Die Erfindung betrifft eine Zungennadel, insbesondere eine Maschinenstricknadel, mit federunterstützter Zunge.The invention relates to a latch needle, in particular a machine knitting needle, with spring-supported tongue.
Zur Maschenbildung werden seit jeher gern Zungennadeln eingesetzt, die einen einfachen Maschenbildungsprozess ermöglichen. Eine solche Zungennadel ist beispielsweise aus der
Der Zungenschlitz ist in der Regel durchgehend ausgebildet, d.h. er ist zu dem Nadelrücken hin offen. Unabhängig davon kann sich in dem Zungenschlitz ansammelnder Schmutz die Funktion der Zungennadel beeinträchtigen.The tongue slot is generally continuous, ie it is open to the back of the needle. Regardless, accumulating in the tongue slot dirt can affect the function of the latch needle.
Des Weiteren ist beispielsweise aus der
Bei Zungennadeln mit frei beweglichen Zungen kann es vorkommen, dass die Zungen durch Rückprallvorgänge oder sonstige äußere Einflüsse in eine undefinierte Lage geraten. Um dies zu vermeiden sind Zungennadeln mit federunterstützter Zunge entwickelt worden. Eine solche offenbart die
Bei diesem Grundaufbau muss der Zungenschlitz relativ geräumig sein, um ein Einfädeln der Zungenfeder zu ermöglichen. Außerdem ist die Zungenfeder in den Federlagertaschen in der Tiefe des Zungenschlitzes nur mäßig gesichert. Es kann vorkommen, dass die Zungenfeder verrutscht und/oder verloren geht und die Nadel nicht mehr korrekt arbeitet.In this basic design, the tongue slot must be relatively spacious to allow threading the tongue spring. In addition, the tongue spring is only moderately secured in the spring bearing pockets in the depth of the tongue slot. It may happen that the tongue spring slips and / or lost and the needle no longer works properly.
Aus der
Die einseitige Lagerung von Zungenfedern ist bei sehr feinen Nadel kritisch. Geringste Fehlpositionierung der zur Lagerung dienenden Stifte können zu einer Fehlstellung der Zungenfeder und somit zu einer Fehlstellung der Zunge in Rücklage führen.The one-sided storage of tongue springs is critical for very fine needle. The slightest mispositioning of the pins used for storage can lead to a misalignment of the tongue spring and thus to a malposition of the tongue in reserve.
Des Weiteren offenbart die
Davon ausgehend ist es Aufgabe der Erfindung, eine verbesserte Zungennadel zu schaffen.On this basis, it is an object of the invention to provide an improved latch needle.
Diese Aufgabe wird mit der Zungennadel nach Anspruch 1 gelöst:This object is achieved with the latch needle according to claim 1:
Die erfindungsgemäße Zungennadel weist einen Zungenschlitz auf, der sich zu dem Nadelrücken hin vorzugsweise bezüglich der Nadellängsrichtung und bedarfsweise zusätzlich in Querrichtung erweitert. In dem sich erweiternden Bereich des Zungenschlitzes ist eine Zungenfeder angeordnet. Entsprechende Federlagertaschen öffnen sich somit zu dem Nadelrücken hin. Die Zungenfeder kann somit zunächst von dem Nadelrücken her einfach in den Zungenschlitz eingelegt und dann z.B. durch einen Prägevorgang befestigt werden. Ein Verbiegen der Zungenfeder beim Einführen, wie beispielsweise bei der
Außerdem hat der in Richtung des Nadelrückens sich erweiternde Zungenschlitz in Form eines nach unten offenen Trichters den Vorteil, dass die Tendenz, dass sich Schmutz im Zungenschlitz ablagert, erheblich vermindert wird und dass im Falle von Ablagerungen diese durch die Zungenbewegung leicht aus dem nach unten offenen Trichter ausgeschieden werden können.In addition, the flared in the direction of the needle back tongue slot in the form of a downwardly open funnel has the advantage that the tendency for dirt deposits in the tongue slot is significantly reduced and that in the case of deposits this easily by the tongue movement from the downwardly open Funnel can be eliminated.
Ein wesentlicher Aspekt der vorliegenden Erfindung ist, dass die Schlitzlänge an dem Nadelrücken einschließlich evtl. vorhandener Federlagertaschen zumindest so groß ist wie die Länge der entspannten Zungenfeder.An essential aspect of the present invention is that the slot length at the needle back including possibly existing spring bearing pockets is at least as large as the length of the relaxed tongue spring.
Bei Zungennadeln nach dem Stand der Technik kann es gelegentlich vorkommen, dass die Zungenfeder verrutscht oder ganz aus der Zungennadel herausfällt. Tritt dies auf, ist eine ordnungsgemäße Funktion der Zungennadel mit großer Wahrscheinlichkeit nicht mehr möglich. Es hat sich gezeigt, dass die erfindungsgemäße Zungennadel mit nadelrückenseitig befestigter Zungenfeder wesentlich weniger empfindlich gegen den Verlust oder die Dejustage der Zungenfeder ist. Die erfindungsgemäße Zungennadel gestatten die Erzielung sehr hoher Strickgeschwindigkeiten und weisen zudem eine hohe Zuverlässigkeit auf.In the case of prior art latch needles, it may occasionally occur that the tongue spring slips or falls completely out of the latch needle. If this occurs, proper function of the latch needle is unlikely to be possible. It has been shown that the latch needle according to the invention with the tongue spring side tongue spring is much less sensitive to the loss or misalignment of the tongue spring. The latch needle according to the invention allow the achievement of very high knitting speeds and also have a high reliability.
Die Zungenfeder kann zur Festlegung bevorzugter Zungenstellungen dienen. Die Zunge hat dann entsprechende, die Vorzugsstellungen festlegende Anlageflächen, die als Planflächen ausgebildet sind. In diesem Fall ist die Zungenfeder vorzugsweise im Wesentlichen gestreckt ausgebildet. Sie kann auch vollkommen gerade sein. Die Zungenfeder kann jedoch auch einen mehr oder weniger stark gekrümmten, an das Ende der Zungenfeder angepassten Abschnitt und diesem benachbarte gebogene Bereiche aufweisen, um die Zunge beispielsweise lediglich von ihren Endstellungen weg zu drücken und ansonsten reibschlüssig zu bremsen. Auch für solche Zungenfedern eignet sich das hier vorgestellte erfindungsgemäße Konzept.The tongue spring can serve to define preferred tongue positions. The tongue then has corresponding, the preferred positions defining contact surfaces, which are designed as flat surfaces. In this case, the tongue spring is preferably formed substantially stretched. It can also be completely straight. However, the tongue spring may also have a more or less curved, adapted to the end of the tongue spring portion and this adjacent curved portions to push the tongue, for example, only from their end positions and otherwise to brake frictionally. Also for such tongue springs, the inventive concept presented here is suitable.
Die Zungenfeder ist in dem Zungenschlitz vorzugsweise formschlüssig gehalten. Ein solcher Halt kann durch Prägestellen oder ähnliche Materialansammlungen oder seitliche Quetschstellen gebildet sein, die die Federlagertaschen zu dem Nadelrücken hin verengen. Der Vorzug dieser Befestigungsform liegt darin, dass sie eine begrenzte axiale Beweglichkeit der Zungenfeder und somit ein Längsspiel zulassen, so dass sich die Zungenfeder beim Durchbiegen in den Federlagertaschen begrenzt bewegen kann. Ein weiterer Vorteil dieser Befestigungsform liegt darin, dass durch die Anordnung bzw. die Position der Prägestellen die Federkraft, welche von der Zungenfeder auf die Zunge ausgeübt wird, beeinflussbar ist. So kann z.B. bei gleicher Federgeometrie mit einem großen Abstand der Prägestellen von der Zungenlagerung eine weiche Federwirkung und bei kleinen Abständen der Prägestelle von der Zungenlagerung eine eher harte Federwirkung erzielt werden. Ist dies nicht erforderlich, kann die Zungenfeder auch anderweitig, beispielsweise durch Laserschweißen befestigt sein. Es können auch gemischte Formen zur Anwendung kommen, bei denen die Zungenfeder an einem Ende mit dem Schaft stoffschlüssig verbunden, beispielsweise verschweißt, und mit ihrem anderen Ende formschlüssig gesichert ist. Der sich zu dem Nadelrücken hin erweiternde Zungenschlitz kann sich zusätzlich zu der Nadelbrust hin erweitern. Seine in Nadellängsrichtung gemessene kürzeste Stelle liegt dann zwischen Nadelbrust und Nadelrücken. Dennoch kann die Schlitzlänge an der Nadelbrust so bemessen werden, dass der Zungenschlitz von der Zunge zu dem Nadelinnenraum hin vollständig oder wenigstens fast vollständig abgedeckt wird, wenn sich die Zunge in Schließlage befindet. Dadurch wird das Eintreten von Schmutz in den Zungenschlitz gemindert. Es besteht nahezu keine Lücke, durch die Schmutz aus dem geschlossenen Hakeninnenraum heraus in den Zungenschlitz gelangen könnte. Außerdem kann das Schlitzende eine Begrenzung für die Schwenkbewegung der Zunge bilden. Zu diesem Zweck kann an dem Ende des Zungenschlitzes eine Anlagefläche für die Zunge ausgebildet sein. Die Position der Anlagefläche ist vorzugsweise so bemessen, dass die Zunge gerade an der Anlagefläche anliegt, wenn auch der Zungenlöffel auf die Hakenspitze trifft. Vorzugsweise aber wird die Anlagefläche gegen diese Position etwas zurück versetzt, so dass der Löffel der Zunge auf der Hakenspitze aufliegen kann, wobei die Zunge die Anlagefläche an dem Ende des Zungenschlitzes gerade noch nicht berührt. Diese Konfiguration hat den Vorzug, dass die Anlagefläche auch bei unvermeidbar auftretenden Produktionstoleranzen das korrekte Schließen des Hakens durch die Zunge nicht stört. Andererseits verhindert sie, dass bei einer teilverschlissenen Zungennadel, deren Zunge ein erhöhtes seitliches Spiel aufweist, die Zunge unter den Haken gelangt. Somit kann auch mit teilverschlissenen Zungennadeln noch sicher gestrickt werden, was die Lebensdauer solcher Zungennadeln wesentlich erhöht.The tongue spring is preferably held positively in the tongue slot. Such a stop may be formed by embossing or similar accumulation of material or lateral crush points, which the spring bearing pockets to narrow the needle back. The advantage of this form of attachment is that they allow a limited axial mobility of the tongue spring and thus a longitudinal clearance, so that the tongue spring can move limited in bending in the spring bearing pockets. Another advantage of this form of attachment is that the spring force, which is exerted by the tongue spring on the tongue, can be influenced by the arrangement or the position of the embossing points. Thus, for example, with the same spring geometry with a large distance of the embossing points of the tongue bearing a soft spring effect and at small distances of the embossing of the tongue bearing a rather hard spring action can be achieved. If this is not necessary, the tongue spring can also be otherwise secured, for example by laser welding. It can also be mixed forms are used, in which the tongue spring materially connected at one end to the shaft, for example, welded, and is secured form-fitting manner with its other end. The tongue slot which widens toward the needle back can expand in addition to the needle breast. Its measured in needle length direction shortest point is then between the needle breast and needle back. Nevertheless, the slot length at the needle face can be sized so that the tongue slot is completely or at least almost completely covered by the tongue towards the needle interior when the tongue is in the closed position. This reduces the ingress of dirt into the tongue slot. There is almost no gap through which dirt from the closed hook interior could get out into the tongue slot. In addition, the slot end may form a limit to the pivotal movement of the tongue. For this purpose, at the end of the tongue slot, a contact surface for the tongue be educated. The position of the contact surface is preferably dimensioned such that the tongue bears straight against the contact surface, even if the tongue spoon hits the point of the hook. Preferably, however, the abutment surface is displaced slightly back against this position, so that the spoon of the tongue can rest on the hook tip, wherein the tongue just barely touches the abutment surface at the end of the tongue slot. This configuration has the advantage that the contact surface does not interfere with the correct closing of the hook by the tongue, even with unavoidable production tolerances. On the other hand, it prevents that in a partially worn tongue needle, the tongue has an increased lateral play, the tongue passes under the hook. Thus, even with partially worn latch needles can still be knitted safely, which significantly increases the life of such latch needles.
Außerdem kann eine Verkürzung des Zungenschlitzes im Bereich des Hakens an der Nadelbrustseite zu einer Aussteifung des Schafts führen, wodurch die Zungennadel im Bereich des Schlitzes stabiler wird. Zusätzlich kann die Führung der Zunge in dem Zungenschlitz verbessert werden, wodurch geringere Anforderungen an die Lagereinrichtung der Zunge gestellt werden. Diese kann beispielsweise durch aus den Seitenwangen heraus gedrückte Zapfen oder Halbzapfen gebildet sein.In addition, a shortening of the tongue slot in the region of the hook on the needle breast side lead to a stiffening of the shaft, whereby the latch needle is stable in the region of the slot. In addition, the guidance of the tongue in the tongue slot can be improved, whereby lesser demands are placed on the bearing means of the tongue. This can be formed for example by pushed out of the side walls pin or half pin.
Hinsichtlich der Rücklage der Zunge wird die nadelbrustseitige Länge des Zungenschlitzes so bemessen, dass die in Rücklage befindliche Zunge an dem Schaft anliegen kann. Dazu kann an dem Ende des Zungenschlitzes eine zusätzliche Ausnehmung zur Aufnahme des an der Zunge ausgebildeten Löffels vorgesehen sein. Derartige Ausnehmungen und Formgebungen interferieren nun nicht mehr mit der Federbefestigung, d.h. beispielsweise den Federlagertaschen. Diese sind erfindungsgemäß zu der Nadelrückseite hin angeordnet.With regard to the reserve of the tongue, the length of the tongue slot on the side of the needle is dimensioned such that the tongue located in the reserve can abut on the shaft. For this purpose, an additional recess for receiving the spoon formed on the tongue can be provided at the end of the tongue slot. Such recesses and shapes no longer interfere with the spring attachment, ie, for example, the spring bearing pockets. These are arranged according to the invention to the needle rear side.
Weitere Einzelheiten vorteilhafter Ausführungsformen der Erfindung sind Gegenstand der Zeichnung, der Beschreibung oder von Ansprüchen. In der Zeichnung sind Ausführungsbeispiele der Erfindung veranschaulicht. Es zeigen:
- Figur 1
- eine erfindungsgemäße Zungennadel in schematisierter Seitenansicht,
Figur 2- die Zungennadel nach
Figur 1 in vergrößerter, teilweise längs geschnittener und ausschnittsweiser Ansicht, Figur 3- die
Zungennadel nach Figur 2 mit Zunge in Schließlage, Figur 4- die
Zungennadel nach Figur 2 mit Zunge in Rückenlage, Figur 5- die Zungennadel nach
Figur 1 und 2 , quer geschnitten im Bereich ihrer Lagereinrichtung, Figur 6- die
Zungennadel nach Figur 2 , quer geschnitten im Bereich ihres Zungenschlitzes und Figur 7- eine abgewandelte Ausführungsform der erfindungsgemäßen Zungennadel in perspektivischer ausschnittsweiser Ansicht.
- FIG. 1
- a latch needle according to the invention in a schematic side view,
- FIG. 2
- the latch needle after
FIG. 1 in enlarged, partly longitudinally cut and fragmentary view, - FIG. 3
- the latch needle after
FIG. 2 with tongue in closed position, - FIG. 4
- the latch needle after
FIG. 2 with tongue in supine position, - FIG. 5
- the latch needle after
FIGS. 1 and 2 , cut transversely in the area of their storage facility, - FIG. 6
- the latch needle after
FIG. 2 , cross cut in the area of her tongue slot and - FIG. 7
- a modified embodiment of the latch needle according to the invention in a perspective fragmentary view.
In
Wie
Eine wesentliche Besonderheit der Zungennadel 1 liegt in der Ausbildung des Zungenschlitzes 9, in dem die Zunge 11 schwenkbar gelagert ist.
An den Flächen 17, 18 sind jeweils Ausnehmungen ausgebildet; die Federlagertaschen 19, 21 bilden. Diese dienen der Aufnahme einer Zungenfeder 22. Die Zungenfeder 22 weist, wie
Die Federlagertaschen 19, 21 sind zu dem Nadelrücken 9 hin im Wesentlichen offen. Die Zungenfeder 22 liegt mit ihren Enden 25, 26 in diesen Federlagertaschen 19, 21, wobei zueinander im Wesentlichen parallele, quer zu der Nadellängsrichtung gerichtete Endflächen 27, 28 der Federlagertaschen 19, 21 voneinander einen Abstand aufweisen, der etwas größer ist als die Länge der Zungenfeder 22. Um ein Herausfallen der Zungenfeder 22 aus den Federlagertaschen 19, 21 zu vermeiden und um die Federkraft der Zungenfeder 22 abzustützen, sind die Federlagertaschen 19, 21 zu dem Nadelrücken 7 hin beispielsweise durch Prägestellen 29, 31 geschlossen. Die Prägestellen können auch durch z.B. per Laser erzeugte Anschmelzungen oder ähnliches ersetzt werden. Wie
Im vorliegenden Ausführungsbeispiel gemäß
An der der Nadelbrust 8 zugewandten Seite des Zungenschlitzes 9 kann sich der Zungenschlitz 9 bezüglich der Nadellängsrichtung ebenfalls erweitern. Dies gilt insbesondere für die von dem Haken 4 abliegende Seite. Hier kann sich an den Zungenschlitz ein beispielsweise verbreiterter Schlitzbereich 32 anschließen, der, wie
Der Zungenschlitz 9 ist hinsichtlich seiner axialen Länge und der Position seines hakenseitigen Endes nadelbrustseitig vorzugsweise so lang oder kurz bemessen, dass die Zunge 11 den Zungenschlitz 9 in Schließlage nahezu verschließt.
Sollte die Zunge 11 durch mit der Zeit zunehmendes seitliches Spiel neben die Spitze 5 des Hakens treffen und somit an dem Haken 4 bzw. seiner Spitze 5 keine Anlage finden, verhindert der geringe Abstand zwischen dem Schlitzende 33 und der Anlagestelle 34 der Zunge 11, dass die Zunge 11 unter die Hakenspitze 5 gerät. Eine entsprechende Position III der Zunge 11 ist in
Ein neues Konzept einer Zungennadel 1 geht von einer rückseitigen Befestigung der Zungenfeder 22 in dem Zungenschlitz 9 der Zungennadel 1 aus. Die Zungennadel 1 weist dazu von dem Nadelrücken 7 her zugängliche Federlagertaschen 19, 21 oder andere geeignete zur Aufnahme der Enden 25, 26 der Zungenfeder 22 geeignete Strukturen auf. Die Federlagertaschenl9, 21 sind zu dem Nadelrücken 7 wenigstens so weit geschlossen, dass die Enden 25, 26 der Zungenfeder 22 formschlüssig oder zumindest verliersicher in den Federlagertaschen 19, 21 gehalten sind. Diese Zungennadel zeigt eine verminderte Toleranzempfindlichkeit bei der Herstellung. Das vorgestellte Nadelkonzept gestattet weitere Verbesserungen, die der Betriebssicherheit und Lebensdauer der Zungennadel entgegen kommen.A new concept of a latch needle 1 is based on a rear attachment of the
- 11
- Zungennadellatch needle
- 22
- Grundkörperbody
- 33
- Schaftshaft
- 44
- Hakenhook
- 55
- Spitzetop
- 66
- Fußfoot
- 77
- Nadelrückenneedle back
- 88th
- Nadelbrustneedle breast
- 99
- Zungenschlitzlatch slot
- 1111
- Zungetongue
- 1212
- LagereinrichtungStorage facility
- 1313
- Lagermittelbearing means
- 1414
- Zungenlochlatch hole
- 1515
- Löffelspoon
- 1616
- Umhängefedertransfer spring
- 17, 1817, 18
- Flächensurfaces
- 19, 2119, 21
- FederlagertaschenSpring bearing pockets
- 2222
- Zungenfederlatch spring
- 23, 2423, 24
- Anlageflächencontact surfaces
- 25, 2625, 26
- Endenend up
- 27, 2827, 28
- Endflächenend surfaces
- 29, 3129, 31
- Prägestellenembossed points
- 29a29a
- Quetschzonensquish
- 3232
- Schlitzbereichslot area
- 3333
- SchlitzendeSlashing
- 3434
- Anlagefläche, StelleContact surface, position
Claims (7)
- Latch needle (1), in particular knitting machine needle,
with a blade (3), on which a hook (4) and a sawslot (9) are configured and which has a needle breast (8) and a needle back (7), between which the sawslot (9) extends, wherein the sawslot (9) widens towards the needle back (7),
with a latch (11), which is disposed to pivot in the sawslot (9), and
with a latch spring (22), which is arranged in the region of the sawslot (9) widening towards the needle back (7),
characterised in that spring bearing cavities (19, 21) opening towards the needle back (7) are arranged in the sawslot (9). - Latch needle according to claim 1, characterised in that the latch spring (22) is positively held in the sawslot (9).
- Latch needle according to claim 1, characterised in that the latch spring (22) is held in the sawslot (9) by at least one stamped location (29, 31).
- Latch needle according to claim 1, characterised in that the sawslot (9) widens towards the needle breast (8).
- Latch needle according to claim 1, characterised in that the latch spring (22) is arranged in the sawslot (9) between a narrow point to be measured in the longitudinal direction of the blade and the needle back (7).
- Latch needle according to claim 1, characterised in that the sawslot (9) is defined by side cheeks, and that for the pivoting mounting of the latch (11), a latch mounting (12) has at least one bearing means (13), which is formed by a journal generated by plastic deformation of a side cheek.
- Latch needle according to claim 1, characterised in that the sawslot (9) has an abutment surface (33) for the latch (11) on its side adjoining the needle breast (7) towards the hook (4).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004049061A DE102004049061B4 (en) | 2004-10-08 | 2004-10-08 | latch needle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1645670A1 EP1645670A1 (en) | 2006-04-12 |
EP1645670B1 true EP1645670B1 (en) | 2008-02-13 |
Family
ID=35677295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05019520A Not-in-force EP1645670B1 (en) | 2004-10-08 | 2005-09-08 | Latch needle |
Country Status (6)
Country | Link |
---|---|
US (1) | US7191620B2 (en) |
EP (1) | EP1645670B1 (en) |
JP (1) | JP4117314B2 (en) |
KR (1) | KR100740023B1 (en) |
CN (1) | CN100529221C (en) |
DE (2) | DE102004049061B4 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1921189B1 (en) * | 2006-11-09 | 2011-05-11 | Groz-Beckert KG | Knitting machine needle |
EP2088228B1 (en) | 2008-02-05 | 2011-10-19 | Groz-Beckert KG | Latch needle |
CN102560875A (en) * | 2011-12-20 | 2012-07-11 | 常州思成凯业精密制针有限公司 | Latch needle |
CN102535000B (en) * | 2011-12-20 | 2013-12-11 | 常州思成凯业精密制针有限公司 | Dustproof latch needle |
EP3604651A1 (en) | 2018-08-03 | 2020-02-05 | Groz-Beckert KG | Latch needle |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE586678C (en) * | 1932-02-21 | 1933-10-24 | Franz Meiwald | Knitting machine with latch needles |
US2044324A (en) | 1935-10-04 | 1936-06-16 | Charles L Page | Latch knitting needle |
US2252302A (en) * | 1937-12-10 | 1941-08-12 | Franklin J Morith | Knitting needle |
DE1113537B (en) | 1954-06-25 | 1961-09-07 | Karl Steinhof App Fabrik | Hand knitting machine, latch needle for a hand knitting machine, and method for making the latch needle |
AT202681B (en) * | 1958-04-10 | 1959-03-25 | Franz Eberl | Latch needles, in particular for hand knitting devices |
DE1410312A1 (en) | 1958-04-19 | 1969-04-10 | Karl Steinhof App Fabrik | Latch needle, especially for hand knitting machines |
GB1165566A (en) * | 1966-11-08 | 1969-10-01 | Redditch Hosiery Needles Ltd | Improvements relating to Latched Needles. |
DE1585437A1 (en) | 1966-11-23 | 1970-12-10 | Texpatent S A R L | Process for feeding a thread into latch needles of circular knitting machines as well as latch needles for carrying out the process |
DE2650985A1 (en) * | 1975-11-12 | 1977-05-26 | Singer Co | Knitting latch needle - having spring-loaded latch with two open positions to give closely knitted stitches |
DE2726834A1 (en) | 1977-06-14 | 1978-12-21 | Hengel Gerhard | Knitting machine latch needle - has a pointed head to give high stitch densities for clothing fabrics |
DE2944300C2 (en) * | 1979-11-02 | 1983-01-27 | Universal-Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co Kg, 7081 Westhausen | Double headed needle |
DE3629334A1 (en) * | 1986-08-28 | 1988-03-10 | Stoll & Co H | FLAT KNITTING MACHINE |
DE3702019C1 (en) * | 1987-01-24 | 1987-09-24 | Groz & Soehne Theodor | Latch needle for stitch-forming textile machines |
DE4324232C2 (en) * | 1993-07-20 | 2002-05-29 | Sipra Patent Beteiligung | Switch needles for machines for the manufacture of knitted fabrics |
DE4334051C1 (en) | 1993-10-06 | 1995-02-16 | Groz & Soehne Theodor | Latch needle for textile machines |
DE4402706C1 (en) * | 1994-01-29 | 1995-06-08 | Groz & Soehne Theodor | Simply mfd., abrasion-resistant, long-life latchet needle |
DE19512375C1 (en) * | 1995-04-01 | 1996-06-20 | Groz & Soehne Theodor | Switch needles for machines for the manufacture of knitted fabrics |
DE19712124C2 (en) * | 1997-03-22 | 1999-07-01 | Groz Beckert Kg | Latch needle for stitch-forming textile machines |
DE10051029C1 (en) * | 2000-10-14 | 2002-07-11 | Groz Beckert Kg | Latch needle with resilient tongue support |
DE10106989C2 (en) * | 2001-02-15 | 2003-04-24 | Groz Beckert Kg | Latch with fixed spring |
DE10232884B4 (en) * | 2002-07-19 | 2004-05-27 | Groz-Beckert Kg | latch needle |
-
2004
- 2004-10-08 DE DE102004049061A patent/DE102004049061B4/en not_active Expired - Fee Related
-
2005
- 2005-09-08 DE DE502005002812T patent/DE502005002812D1/en active Active
- 2005-09-08 EP EP05019520A patent/EP1645670B1/en not_active Not-in-force
- 2005-09-30 CN CNB2005101071109A patent/CN100529221C/en not_active Expired - Fee Related
- 2005-10-05 US US11/243,431 patent/US7191620B2/en not_active Expired - Fee Related
- 2005-10-06 JP JP2005293652A patent/JP4117314B2/en not_active Expired - Fee Related
- 2005-10-07 KR KR1020050094201A patent/KR100740023B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JP2006104653A (en) | 2006-04-20 |
DE102004049061A1 (en) | 2006-04-20 |
DE502005002812D1 (en) | 2008-03-27 |
CN1757805A (en) | 2006-04-12 |
US20060075788A1 (en) | 2006-04-13 |
US7191620B2 (en) | 2007-03-20 |
KR100740023B1 (en) | 2007-07-18 |
CN100529221C (en) | 2009-08-19 |
KR20060052091A (en) | 2006-05-19 |
DE102004049061B4 (en) | 2006-08-24 |
JP4117314B2 (en) | 2008-07-16 |
EP1645670A1 (en) | 2006-04-12 |
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