EP1645670A1 - Aiguille à clapet - Google Patents

Aiguille à clapet Download PDF

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Publication number
EP1645670A1
EP1645670A1 EP05019520A EP05019520A EP1645670A1 EP 1645670 A1 EP1645670 A1 EP 1645670A1 EP 05019520 A EP05019520 A EP 05019520A EP 05019520 A EP05019520 A EP 05019520A EP 1645670 A1 EP1645670 A1 EP 1645670A1
Authority
EP
European Patent Office
Prior art keywords
tongue
needle
spring
slot
latch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05019520A
Other languages
German (de)
English (en)
Other versions
EP1645670B1 (fr
Inventor
Eric Jürgens
Andreas Dietz
Wolfgang Schmoll
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Groz Beckert KG
Original Assignee
Groz Beckert KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Groz Beckert KG filed Critical Groz Beckert KG
Publication of EP1645670A1 publication Critical patent/EP1645670A1/fr
Application granted granted Critical
Publication of EP1645670B1 publication Critical patent/EP1645670B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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 known, for example, from US Pat. No. 3,453,845.
  • 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 in 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, i. he is open to the back of the needle. Regardless, accumulating in the tongue slot dirt can affect the function of the latch needle.
  • the 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. Through this to the needle back existing funnel-like expansion, the formation of dirt accumulation should be prevented or at least mitigated by the dirt can escape better from the needle slot.
  • tongue needles with spring-loaded tongue have been developed.
  • the latch needle has a tongue slot, which widens to the needle breast with respect to the shaft longitudinal direction.
  • To the back of the needle is the Tongue slit limited 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.
  • 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 initially inserted from the needle back forth simply in the tongue slot and then attached eg by a stamping process. A bending of the tongue spring during insertion, such as in DE-AS 1113537, is therefore 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 crimping, which narrow the spring bearing pockets to 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 can be formed 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.
  • it prevents that in a partially worn latch needle whose tongue has an increased lateral play, the tongue gets under the hook.
  • 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, i. for example, the spring storage bags.
  • FIG. 1 illustrates a latch needle 1 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 lower in Figure 2 from 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 upper side in Figure 1 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 visible through the longitudinal section illustrated in FIG.
  • the tongue slot 9 serves to receive one end of a tongue 11, wherein it is pivotally supported by a bearing device 12.
  • the storage facility is provided by a storage means 13 e.g. formed a bearing pin, which passes through a tongue 11 formed in the end tongue hole 14.
  • 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 can be subdivided into two half-pins 13 a, 13 b, which delimit the tongue slot 9 Side cheeks of the shaft 3 are pressed inwardly to form in the tongue hole 14 cross-projections.
  • FIG. 2 illustrates in dashed lines a plurality of pivot positions of the tongue 11.
  • the tongue slot 9 expands, in particular FIG. 2 as well as FIGS. 3 and 4, towards the needle back 7. It is bounded at its axially front and axially rear ends by narrow surfaces 17, 18 which diverge away from each other, i. together form an angle which opens downwards in FIG. 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 Figure 5 or 6 reveals, 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, which stabilize a stable supine position of the tongue 11 ( Figure 4) or a closed position ( Figure 3) adjacent position.
  • 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 embossments can also be made by e.g. be replaced by laser-generated amalgamations or the like. As illustrated in FIG.
  • lateral crimping zones 29a can also be formed, in which the shank 3 is compressed laterally directly at the needle back in order to close the spring-loaded pocket 19.
  • 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 on the needle back 7 ,
  • the spring bearing pocket 21 and its embossing points 31 With the size and the depth of the respective embossing points 29, 31, measured from the needle back 7, can the bias of the tongue spring 22 in their spring bearing pockets 19, 21 regulate.
  • 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 example widened slot portion 32 may connect to the tongue slot, which, as Figure 4 illustrates, allows the transfer of the tongue 11 in an investment position in which the tongue 11 contacts the shaft 3. This position is shown by dashed lines in Figure 4 for the tongue 11.
  • the stable return position of the tongue 11, in which the tongue 11 rests with its contact surface 23 on the tongue spring 22 is shown in Figure 4 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.
  • Figure 2 illustrates in a first dashed line I of the tongue 11, the stable, the hook 4 adjacent rest position of the tongue 11. It is 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 indicated in Figure 2 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 spring bearing pockets 19, 21 are closed to the needle back 7 at least so far that the ends 25, 26 of the tongue spring 22 are held positively or at least captively 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Knitting Machines (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
EP05019520A 2004-10-08 2005-09-08 Aiguille à clapet Expired - Fee Related EP1645670B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004049061A DE102004049061B4 (de) 2004-10-08 2004-10-08 Zungennadel

Publications (2)

Publication Number Publication Date
EP1645670A1 true EP1645670A1 (fr) 2006-04-12
EP1645670B1 EP1645670B1 (fr) 2008-02-13

Family

ID=35677295

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05019520A Expired - Fee Related EP1645670B1 (fr) 2004-10-08 2005-09-08 Aiguille à clapet

Country Status (6)

Country Link
US (1) US7191620B2 (fr)
EP (1) EP1645670B1 (fr)
JP (1) JP4117314B2 (fr)
KR (1) KR100740023B1 (fr)
CN (1) CN100529221C (fr)
DE (2) DE102004049061B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3604651A1 (fr) * 2018-08-03 2020-02-05 Groz-Beckert KG Aiguille à clapet

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1921189B1 (fr) * 2006-11-09 2011-05-11 Groz-Beckert KG Aiguille pour machine à tricoter
EP2088228B1 (fr) 2008-02-05 2011-10-19 Groz-Beckert KG Aiguille à clapet
CN102560875A (zh) * 2011-12-20 2012-07-11 常州思成凯业精密制针有限公司 舌针
CN102535000B (zh) * 2011-12-20 2013-12-11 常州思成凯业精密制针有限公司 防尘舌针

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE586678C (de) * 1932-02-21 1933-10-24 Franz Meiwald Strickmaschine mit Zungennadeln
DE2650985A1 (de) * 1975-11-12 1977-05-26 Singer Co Zungennadel
DE4324232A1 (de) * 1993-07-20 1995-01-26 Sipra Patent Beteiligung Zungennadel für Maschinen zur Herstellung von Maschenware
EP1233092A1 (fr) * 2001-02-15 2002-08-21 Groz-Beckert KG Aiguille à clapet avec ressort fixé

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 (de) 1954-06-25 1961-09-07 Karl Steinhof App Fabrik Handstrickapparat, Zungennadel fuer einen Handstrickapparat, und Verfahren zur Herstellung der Zungennadel
AT202681B (de) * 1958-04-10 1959-03-25 Franz Eberl Zungennadel, insbesondere für Handstrickgeräte
DE1410312A1 (de) 1958-04-19 1969-04-10 Karl Steinhof App Fabrik Zungennadel,insbesondere fuer Handstrickapparate
GB1165566A (en) * 1966-11-08 1969-10-01 Redditch Hosiery Needles Ltd Improvements relating to Latched Needles.
DE1585437A1 (de) 1966-11-23 1970-12-10 Texpatent S A R L Verfahren zum Zufuehren eines Fadens in Zungennadeln von Rundstrickmaschinen sowie Zungennadeln zum Durchfuehren des Verfahrens
DE2726834A1 (de) 1977-06-14 1978-12-21 Hengel Gerhard Zungennadel zur erzielung hoeherer wirtschaftlichkeit und groesserer maschendichte in der maschinenstrickerei
DE2944300C2 (de) * 1979-11-02 1983-01-27 Universal-Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co Kg, 7081 Westhausen Doppelkopfnadel
DE3629334A1 (de) * 1986-08-28 1988-03-10 Stoll & Co H Flachstrickmaschine
DE3702019C1 (de) * 1987-01-24 1987-09-24 Groz & Soehne Theodor Zungennadel fuer maschenbildende Textilmaschinen
DE4334051C1 (de) 1993-10-06 1995-02-16 Groz & Soehne Theodor Zungennadel für Textilmaschinen
DE4402706C1 (de) * 1994-01-29 1995-06-08 Groz & Soehne Theodor Zungennadel für Textilmaschinen
DE19512375C1 (de) * 1995-04-01 1996-06-20 Groz & Soehne Theodor Zungennadel für Maschinen zur Herstellung von Maschenware
DE19712124C2 (de) * 1997-03-22 1999-07-01 Groz Beckert Kg Zungennadel für maschenbildende Textilmaschinen
DE10051029C1 (de) * 2000-10-14 2002-07-11 Groz Beckert Kg Zungennadel mit federnder Zungenunterstützung
DE10232884B4 (de) * 2002-07-19 2004-05-27 Groz-Beckert Kg Zungennadel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE586678C (de) * 1932-02-21 1933-10-24 Franz Meiwald Strickmaschine mit Zungennadeln
DE2650985A1 (de) * 1975-11-12 1977-05-26 Singer Co Zungennadel
DE4324232A1 (de) * 1993-07-20 1995-01-26 Sipra Patent Beteiligung Zungennadel für Maschinen zur Herstellung von Maschenware
EP1233092A1 (fr) * 2001-02-15 2002-08-21 Groz-Beckert KG Aiguille à clapet avec ressort fixé

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3604651A1 (fr) * 2018-08-03 2020-02-05 Groz-Beckert KG Aiguille à clapet
WO2020025589A1 (fr) 2018-08-03 2020-02-06 Groz-Beckert Kg Aiguille à clapet
US11434589B2 (en) 2018-08-03 2022-09-06 Groz-Beckert Kg Latch needle

Also Published As

Publication number Publication date
DE102004049061A1 (de) 2006-04-20
KR100740023B1 (ko) 2007-07-18
JP4117314B2 (ja) 2008-07-16
DE102004049061B4 (de) 2006-08-24
KR20060052091A (ko) 2006-05-19
JP2006104653A (ja) 2006-04-20
DE502005002812D1 (de) 2008-03-27
EP1645670B1 (fr) 2008-02-13
CN100529221C (zh) 2009-08-19
CN1757805A (zh) 2006-04-12
US20060075788A1 (en) 2006-04-13
US7191620B2 (en) 2007-03-20

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