EP0231435B1 - Zungennadel für Textilmaschinen und Verfahren zu deren Herstellung - Google Patents

Zungennadel für Textilmaschinen und Verfahren zu deren Herstellung 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
Authority
EP
European Patent Office
Prior art keywords
bore
needle
latch
longitudinal slot
shaft
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
EP86114373A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0231435A1 (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 EP0231435A1 publication Critical patent/EP0231435A1/de
Application granted granted Critical
Publication of EP0231435B1 publication Critical patent/EP0231435B1/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 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Rolling Contact Bearings (AREA)
EP86114373A 1986-01-11 1986-10-17 Zungennadel für Textilmaschinen und Verfahren zu deren Herstellung Expired - Lifetime EP0231435B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

Publication Number Publication Date
EP0231435A1 EP0231435A1 (de) 1987-08-12
EP0231435B1 true EP0231435B1 (de) 1990-01-17

Family

ID=6291679

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86114373A Expired - Lifetime EP0231435B1 (de) 1986-01-11 1986-10-17 Zungennadel für Textilmaschinen und Verfahren zu deren Herstellung

Country Status (8)

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

Families Citing this family (8)

* 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
JPH0265731U (enrdf_load_stackoverflow) * 1988-11-08 1990-05-17
DD284925A5 (de) * 1989-06-12 1990-11-28 ��������@��������@����������@���k�� Zungennadel
US5697773A (en) * 1994-08-23 1997-12-16 Denticator International, Inc. Rotary fluid reaction device having hinged vanes
DE10341630B4 (de) * 2003-09-10 2006-11-16 Groz-Beckert Kg Zungennadel
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
CN112251903A (zh) * 2020-09-28 2021-01-22 宋悦 一种纺织机织针结构

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE608619C (de) * 1935-01-28 Torrington Co Verfahren zur Herstellung von Strickmaschinennadeln
DE215749C (enrdf_load_stackoverflow) *
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 (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
US3850011A (en) * 1972-06-23 1974-11-26 Torrington Co Latch pivot for latch needle

Also Published As

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

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