EP0232466B1 - Zungennadel für Textilmaschinen - Google Patents

Zungennadel für Textilmaschinen Download PDF

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Publication number
EP0232466B1
EP0232466B1 EP86114374A EP86114374A EP0232466B1 EP 0232466 B1 EP0232466 B1 EP 0232466B1 EP 86114374 A EP86114374 A EP 86114374A EP 86114374 A EP86114374 A EP 86114374A EP 0232466 B1 EP0232466 B1 EP 0232466B1
Authority
EP
European Patent Office
Prior art keywords
needle shaft
needle
latch
pivot pin
cheeks
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.)
Expired - Lifetime
Application number
EP86114374A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0232466A1 (de
Inventor
Sigmar Majer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Groz Beckert KG
Original Assignee
Theodor Groz and Soehne and Ernst Beckert Nadelfabrik KG
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 Theodor Groz and Soehne and Ernst Beckert Nadelfabrik KG filed Critical Theodor Groz and Soehne and Ernst Beckert Nadelfabrik KG
Publication of EP0232466A1 publication Critical patent/EP0232466A1/de
Application granted granted Critical
Publication of EP0232466B1 publication Critical patent/EP0232466B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
    • D04B35/04—Latch needles

Definitions

  • the invention relates to a latch needle for textile machines with a tongue which can be pivoted in a longitudinal slot of the needle shaft and which is pivotably mounted by means of a continuous bearing bore on a one-piece cylindrical axle bolt which is inserted into corresponding coaxial bores of the needle shaft cheeks which laterally delimit the longitudinal slot and is captively fixed therein, wherein the length of the axle pin is smaller than the needle shaft thickness at the tongue bearing point and fixing elements for the axle pin are formed from the material of the needle shaft cheeks. the axle bolts are formed.
  • 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.
  • High requirements are generally placed on the storage of the tongue with regard to mechanical resilience and accuracy of the tongue guidance, in particular when the latch needles work in high-speed knitting machines or when knitting robust yarns.
  • the axle pin is namely rigidly connected at the end to the needle shaft cheeks, for example screwed or welded (DE-C1-12 96 734, CH-A-476 141) or by means of fixing elements formed from the material of the needle shaft cheeks by an embossing process which engage in recesses in the axle pin (US-A-27 67 566, DE-C1-11 59 585), which results in a rigid and transverse to the axis of symmetry completely inelastic tongue bearing arrangement, which was recognized as the cause of premature jaw fractures.
  • tongue needles are used almost consistently in practice, in which the needle tongue with its bearing bore is pivotally mounted on two bearing pins pressed out of the material of the needle shaft cheeks (US-A-39 34 109, GB-C-836 297). Because of the unpredictable flow behavior of the material of the needle shaft cheeks pressed into the bearing bore of the tongue, the bearing pins produced by an embossing process and connected to the needle shaft cheeks are more or less irregular on their outer surface, with the result that the area bearing portion of the needle tongue on the bearing pins is also one brand new needle is relatively small.
  • the state of the art in the Federal Republic of Germany also includes the proposal (DE-A-35 46 037) to provide a bore in only one of the two needle shaft cheeks delimiting the longitudinal slot and to press in an axle pin of approximately 2/3 of the needle shaft thickness in this, the of the opposite cheek, with which it may be welded.
  • the axle pin can be fixed by an impression of an embossing tool that surrounds the bore of the shaft cheek in a ring.
  • a one-sided needle shaft cheek drilling is not economically feasible, especially with thin needles in mass production; one-sided stress on a latch needle in the area of its latch support is also undesirable.
  • the object of the invention is therefore to remedy this situation and to create a latch needle which, on the one hand, has the advantages with regard to accuracy and wear resistance of the latch bearing of a latch needle provided with a continuous axle bolt and, on the other hand, maintains its full suitability for use over long operating periods without the risk of the occurrence of broken jaws .
  • the latch needle mentioned at the outset is characterized according to the invention in that the fixing elements act only as axial stops for the axle bolt in one direction in the vicinity of the outward-facing free end faces of the axle bolt lying in the depth of the holes in the needle shaft cheeks in the bores the needle shaft cheeks are arranged protruding.
  • the tongue with its bearing bore is perfectly supported with the largest possible surface area and therefore a correspondingly small specific pivot bearing surface load.
  • the fixing elements deformed into the bore of the needle shaft cheeks ensure that the axle bolt does not slide outward over time and can endanger the tongue in its storage. Since the needle shaft cheeks are not rigidly connected to the axle bolt, they can deflect laterally transversely to the plane of needle symmetry to the extent required, so that a corresponding elasticity that is effective transversely to the axis of needle symmetry is ensured and jaw fractures are thus reliably prevented.
  • annular material bead is formed from the material of the needle shaft cheeks as the fixing element.
  • the fixing elements are axially spaced from the adjacent end faces of the axle bolt, so that an inward elastic movement of the needle shaft cheeks is possible without hindrance if necessary.
  • axle bolt with its outside facing end faces is essentially in the half of the bore adjacent to the longitudinal slot in the needle shaft cheeks.
  • the latch needle has a needle shaft 1, on which a hook 2 is integrally formed at one end and can carry feet, not shown, which interact in a known manner with lock parts of knitting machines etc.
  • a tongue 5 is pivotally mounted, which at one end carries a tongue spoon 7 covering the hook tip 6 in the closed position shown and whose shaft 8 fitted into the longitudinal slot 3 with parallel flanks has a bearing bore 9.
  • a transverse bore 12 is formed which is coaxial with the pivot axis of the tongue 5 indicated at 11 and into which a smooth-walled cylindrical axle bolt 13 is inserted in the sliding seat, crossing the longitudinal slot 3.
  • the tongue with its bearing bore 9 is supported with a small radial bearing clearance, which corresponds, for example, to a diameter difference of + 0.001 mm and less.
  • the axle bolt 13 lies with its outwardly facing parallel end faces 14 in the half of the respective bore 12 adjacent to the longitudinal slot 3, whereby in the illustrated embodiment it projects approximately to the center of the bore depth. It is axially fixed in the bores 12 by fixing elements projecting into these bores, which are in the vicinity of the free end faces 14 of the axle bolt 13 and are formed from the material of the needle shaft cheeks 10. In the exemplary embodiment shown, these fixing elements are each in the form of an annular material bead 15, which lies at a small axial distance 16 from the adjacent end faces 14 of the axle bolt 13.
  • the needle shaft cheeks 10 can deflect elastically laterally if they are subjected to a corresponding alternating load during operation. This eliminates the risk of broken jaws.
  • finger-like or tooth-like fixing elements could also be provided, which are formed in the material of the needle shaft side cheeks 10 by an embossing process and project into the bores 12 in a corresponding manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Sewing Machines And Sewing (AREA)
  • Rolling Contact Bearings (AREA)
EP86114374A 1986-01-11 1986-10-17 Zungennadel für Textilmaschinen Expired - Lifetime EP0232466B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3600621A DE3600621C1 (de) 1986-01-11 1986-01-11 Zungennadel fuer Textilmaschinen
DE3600621 1986-01-11

Publications (2)

Publication Number Publication Date
EP0232466A1 EP0232466A1 (de) 1987-08-19
EP0232466B1 true EP0232466B1 (de) 1990-07-25

Family

ID=6291680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86114374A Expired - Lifetime EP0232466B1 (de) 1986-01-11 1986-10-17 Zungennadel für Textilmaschinen

Country Status (8)

Country Link
US (1) US4723425A (enrdf_load_stackoverflow)
EP (1) EP0232466B1 (enrdf_load_stackoverflow)
JP (1) JPS62162056A (enrdf_load_stackoverflow)
KR (1) KR890001494B1 (enrdf_load_stackoverflow)
CN (1) CN86108796B (enrdf_load_stackoverflow)
CA (1) CA1270123A (enrdf_load_stackoverflow)
DE (2) DE3600621C1 (enrdf_load_stackoverflow)
ES (1) ES2016238B3 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3800802C1 (enrdf_load_stackoverflow) * 1988-01-14 1989-02-16 Theodor Groz & Soehne & Ernst Beckert Nadelfabrik Kg, 7470 Albstadt, De
FR2639964B1 (fr) * 1988-12-06 1991-01-11 Aerospatiale Aiguille a chas ouvrant perfectionnee
DE4334051C1 (de) * 1993-10-06 1995-02-16 Groz & Soehne Theodor Zungennadel für Textilmaschinen
EP2224048B1 (de) 2009-02-26 2011-08-31 Groz-Beckert KG Zungennadel mit drehendem Achsstift
PT2604359T (pt) 2011-12-14 2017-07-24 Groz Beckert Kg Agulha de lingueta com melhorada chumaceira de lingueta, e respectivo procedimento de fabricação

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US210653A (en) * 1878-12-10 Improvement in knitting-machine needles
US2767566A (en) * 1955-01-25 1956-10-23 George A Parsons Latch needle pivot
GB836297A (en) * 1958-01-23 1960-06-01 Torrington Co Improvements in or relating to bearings for latch knitting needles
FR1203866A (fr) * 1958-05-20 1960-01-21 Lebocey Aiguilles Aiguille à palette articulée pour métiers de bonneterie
DE1159585B (de) * 1961-11-23 1963-12-19 Groz & Soehne Theodor Zungennadel fuer Strickmaschinen
FR1340474A (fr) * 1962-11-22 1963-10-18 Groz & Soehne Theodor Aiguille à palette pour métiers à tricoter ou machines analogues
GB1142409A (en) * 1966-06-21 1969-02-05 Groz & Soehne Theodor A latch needle for knitting machines
GB1183430A (en) * 1967-12-18 1970-03-04 Groz & Soehne Theodor Latch Needle for Knitting Machines
DE1296734B (de) * 1967-12-18 1969-06-04 Groz & Soehne Theodor Zungennadel fuer Strickmaschinen
DE1906892A1 (enrdf_load_stackoverflow) * 1969-02-12 1970-05-14
US3934109A (en) * 1972-06-23 1976-01-20 The Torrington Company Latch pivot for latch needle
DE3546037A1 (de) * 1985-03-14 1986-09-18 Ulrich Dipl.-Ing. 7470 Albstadt Hofmann Verfahren zur herstellung der zungenlagerung in strickmaschinennadeln

Also Published As

Publication number Publication date
EP0232466A1 (de) 1987-08-19
KR870007321A (ko) 1987-08-18
KR890001494B1 (ko) 1989-05-04
US4723425A (en) 1988-02-09
DE3672997D1 (de) 1990-08-30
CA1270123A (en) 1990-06-12
CN86108796B (zh) 1988-09-14
CN86108796A (zh) 1987-07-22
JPH0157174B2 (enrdf_load_stackoverflow) 1989-12-04
JPS62162056A (ja) 1987-07-17
ES2016238B3 (es) 1990-11-01
DE3600621C1 (de) 1987-05-07

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