EP0405130A1 - Aiguille à clapet pour machines à formation de produits maillés - Google Patents

Aiguille à clapet pour machines à formation de produits maillés Download PDF

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Publication number
EP0405130A1
EP0405130A1 EP90109546A EP90109546A EP0405130A1 EP 0405130 A1 EP0405130 A1 EP 0405130A1 EP 90109546 A EP90109546 A EP 90109546A EP 90109546 A EP90109546 A EP 90109546A EP 0405130 A1 EP0405130 A1 EP 0405130A1
Authority
EP
European Patent Office
Prior art keywords
needle
tongue
latch
symmetry
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.)
Granted
Application number
EP90109546A
Other languages
German (de)
English (en)
Other versions
EP0405130B1 (fr
Inventor
Bernd Schuler
Kurt Wiedenhöfer
Otto Langenstein
Siegfried Wissmann
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 EP0405130A1 publication Critical patent/EP0405130A1/fr
Application granted granted Critical
Publication of EP0405130B1 publication Critical patent/EP0405130B1/fr
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 machines for the manufacture of knitted fabrics, with a needle shaft, a needle head and a needle tongue pivotally mounted in a tongue slot of the needle shaft about a transverse tongue axis.
  • the tongue needle is designed with a reduced shaft height in its front shaft region facing the head.
  • the shaft height between the needle foot and throat is kept as small as possible. Because of this low shaft height, the stability of the latch needle in the shaft region adjoining the head is correspondingly reduced.
  • the needle Under the influence of lateral forces which act on the head and the throat area of the needle during the stitch formation process and originate, inter alia, from the goods take-off device, the needle is not only removed from its symmetrical position by the predetermined amount corresponding to the necessary play between the needle bed walls and the needle shaft moved to the corresponding needle bed wall, but the stitch-forming part of the latch needle protruding from the needle bed is inevitably elastically pushed aside somewhat from its originally central position. A needle tongue which is no longer exactly aligned with the hook tip with its spoon is thus brought up to the adjacent knitting tool, for example a circuit board, so that it touches the knitting tool with its tongue spoon during its pivoting movement.
  • the adjacent knitting tool for example a circuit board
  • the object of the invention is therefore to provide a latch needle, the needle tongue of which regardless of the hinge length and with a low needle shaft even after a long period of use under the action of lateral forces closes perfectly on the needle head and remains so close to the longitudinal plane of symmetry of the needle during its pivoting movement that rubbing against adjacent knitting tools, in particular sinkers, is reliably prevented.
  • the latch needle mentioned at the outset is characterized according to the invention in that the latch slot is arranged with its longitudinal plane of symmetry including an acute angle with the longitudinal plane of symmetry of the needle shaft.
  • the tongue slot with its longitudinal plane of symmetry is not arranged lying in the center plane of the needle, when the needle is appropriately installed in the machine, it is ensured that under the action of the lateral forces occurring during the stitch formation process, the needle tongue during its pivoting movement with its spoon is not substantially above the plane of needle symmetry, ie can be pushed out to the side so far that it brushes against the adjacent knitting tool. At the same time, the flawless, essentially central support of the tongue spoon on the needle head is retained.
  • the tongue slot with its longitudinal plane of symmetry can be arranged pivoted toward the needle sides with respect to the longitudinal plane of symmetry of the needle shaft with respect to the longitudinal plane of symmetry of the needle shaft, so that the tongue slot is inclined in the plan view of the needle upper side.
  • the arrangement can also be such that the tongue slot with its longitudinal plane of symmetry extends around a longitudinal axis in the needle shaft Axis is laterally tilted.
  • the acute angle enclosed between the longitudinal plane of symmetry, the needle tongue and the longitudinal plane of symmetry of the needle shaft which is characteristic of the lateral pivoting and / or tilting of the longitudinal plane of symmetry of the tongue slot, can expediently lie with its apex in the area of the tongue slot.
  • embodiments are also conceivable in which the apex of this acute angle comes to lie outside the latch slot.
  • the size of the acute angle depends, among other things. on the jaw height, the needle shaft thickness and the installation conditions of the needle in the associated knitting machine. It is advantageously between 0.5 ° and 6 °.
  • the needle shaft in the region of the transition to the throat may have at least one elevation on its upper side, which provides the needle with improved support by securely resting against the needle bed walls Gives the machine a needle bed.
  • the elevation can prevent the needle in its shaft region adjacent to the needle head from operating under critical conditions, under the influence of lateral forces, beyond the amount dictated by the inevitable play between the tongue needle and the needle bed walls in the direction of the needle bed wall opposite the rotational movement of the needle cylinder about its longitudinal axis tilts.
  • the protruding from the needle bed The stitch-forming part of the latch needle with the needle head and needle tongue is thereby additionally held in a position appropriate for a trouble-free workflow.
  • Machines for the production of knitted fabrics are preferably knitting and knitting machines, but in particular circular knitting and knitting machines, which work with latch needles and in which, due to the technological circumstances, for example due to the rotary movement of the needle cylinder and the dial or, as a result of the goods take-off, lateral forces acting on the needle head and / or tongue and the subsequent needle shaft region occur.
  • the latch needle shown in FIG. 1 using the designation according to DIN ISO 8119, has a needle shaft 1 which carries a foot 2 at one end and a needle head or hook 3 at the other end.
  • a longitudinal tongue slot 8 is formed in the needle shaft 1 in the region of the breast designated by 4, which is followed by a throat 6 on the upper side 7 of the needle.
  • the tongue slot 8 has an opening 10 which opens toward the needle back 9 and is arranged approximately below the tongue axis 120.
  • a needle tongue 11 is pivotally mounted in the tongue slot 8 about a transverse tongue axis 120.
  • the needle tongue 11 is formed at its end facing away from the tongue axis 120 with a tongue spoon 12 which is seated on a tongue shaft 13 which dips into the tongue slot 8 and has the bearing bore for the tongue axis 120.
  • the tongue spoon 12 lies centrally on the hook tip 14.
  • the elongated, laterally parallel flanked tongue slot 8 is milled into the needle shaft 1 punched out of sheet metal (steel strip) or made of steel wire such that its longitudinal plane of symmetry 15 includes an acute angle with the longitudinal plane of symmetry 16 of the needle shaft 1.
  • the tongue slot 8 with its longitudinal plane of symmetry 15 is pivoted obliquely toward the needle shaft sides 18, 19 with respect to the longitudinal plane of symmetry 16 of the needle shaft 1 with its longitudinal plane of symmetry 15 about a vertical axis 17 extending from the needle upper side 7 to the needle back 9 arranged, the tip enclosed between the two longitudinal symmetry planes 15, 16 Angle is designated 20.
  • the vertical axis 17 runs through the opening 10; it is aligned parallel to the side flanks of the tongue slot 8, which means that the apex of the acute angle 20 lies within the area of the tongue slot 8.
  • the tongue slot 8 with its longitudinal plane of symmetry 15 is arranged laterally tilted about an axis 21 (FIG. 6) extending in the longitudinal direction of the needle shaft, so that the one between the two Longitudinal symmetry planes 15, 16 included acute angles 20a result from FIG. 6.
  • the acute angle 20 or 20a is of the order of 0.5 ° to 6 °; In exceptional cases, deviations from this area are possible on both sides.
  • the arrangement of the tongue slot 8 according to the embodiment according to FIGS. 3, 4 can also be combined with that according to the embodiment according to FIGS. 5, 6, such that the tongue slot 8 lies "skewed" in the needle shaft 1 and accordingly both acute angle 20 and the acute angle 20a between the two longitudinal symmetry planes 15, 16 occurs.
  • these two acute angles 20, 20a can be of the same or preferably different sizes.
  • the needle tongue 11 which is guided laterally with its tongue shaft 13 in the tongue slot 8, comes to lie in the closed position in the rest position in such a way that its spoon is displaced to one side on the hook tip 14 rests.
  • the latch needle shown in FIGS. 3, 5 is inserted, for example, into the needle cylinder of a circular knitting machine rotating clockwise, as indicated by an arrow 22 in FIG. 5, the needle tongue 11 and somewhat also the needle head 3 are counteracted by the acting side forces the direction of the arrow is bent somewhat elastically to the side, the needle shaft 1 being pressed against the associated side wall of the needle bed on the needle side 19 located at the rear in the direction of rotation.
  • the tongue spoon 12 Due to the inclined or tilted position of the tongue slot 8, however, it is ensured that the tongue spoon 12 covers the hook tip 14 properly and with its longitudinal plane of symmetry 15 cannot be pushed laterally beyond the longitudinal symmetry plane 16 of the needle shaft 1 in the direction of rotation 22. This certainly precludes the tongue spoon 12 from brushing against an adjacent plate, etc., even when finely divided.
  • the two described embodiments of the latch needle have a toothed tongue spoon 12.
  • the invention can also be used to the same extent for latch needles with a toothed needle head 3, as it is independent of the design of the contact surface of the needle tongue on the needle head.
  • the needle shaft 1 is provided on the upper side 7 in the area of the transition to the throat 6 with an elevation 23, which may also be shorter or may be replaced by several elevations of the same type arranged one behind the other.
  • This elevation 23, which may also be considerably shorter than shown in the drawing, prevents the latch needle in its relatively low shaft area adjoining the throat 6 under the action of the lateral forces acting on the needle head 3 between the needle bed walls by an amount beyond the operationally necessary play is tilted or wound to such an extent that under difficult operating conditions there is still the risk of the needle tongue being touched 11 occurs on the adjacent board, etc.
  • the stitch-forming part of the latch needle with the needle head 3 and the latch 11 protruding from the needle cylinder is thereby held in the correct position in the needle bed for a trouble-free workflow even under these conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP90109546A 1989-06-30 1990-05-19 Aiguille à clapet pour machines à formation de produits maillés Expired - Lifetime EP0405130B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3921458A DE3921458C1 (fr) 1989-06-30 1989-06-30
DE3921458 1989-06-30

Publications (2)

Publication Number Publication Date
EP0405130A1 true EP0405130A1 (fr) 1991-01-02
EP0405130B1 EP0405130B1 (fr) 1993-10-13

Family

ID=6383968

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90109546A Expired - Lifetime EP0405130B1 (fr) 1989-06-30 1990-05-19 Aiguille à clapet pour machines à formation de produits maillés

Country Status (6)

Country Link
US (1) US5090218A (fr)
EP (1) EP0405130B1 (fr)
JP (1) JPH03220349A (fr)
CA (1) CA2020046C (fr)
DE (2) DE3921458C1 (fr)
ES (1) ES2045641T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1146157B1 (fr) * 2000-04-15 2004-07-14 Groz-Beckert KG Aiguille à clapet avec espace de fil amélioré
EP1767678B1 (fr) * 2005-09-22 2008-03-26 Groz-Beckert KG Aiguille à tricoter pour métier à tricoter
US7757516B1 (en) 2005-11-21 2010-07-20 Hbi Branded Apparel Enterprises, Llc Abrasive knitting needle and sinker
US7634922B2 (en) * 2005-11-21 2009-12-22 Hbi Branded Apparel Enterprises, Llc Knitting needle for knitting sueded fabrics and methods of knitting sueded fabrics
US7757515B1 (en) 2009-03-11 2010-07-20 Hbi Branded Apparel Enterprises, Llc Cut pile fabric and method of making same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE672512C (de) * 1936-10-18 1939-03-04 Dubied & Cie Sa E Strickmaschinennadel
DE3140386A1 (de) * 1981-10-10 1983-04-28 Theodor Groz & Söhne & Ernst Beckert Nadelfabrik KG, 7470 Albstadt "zungennadel fuer maschinen zur herstellung von maschenware"

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1764342A (en) * 1929-07-03 1930-06-17 Gotham Knitbac Machine Corp Knitting needle
DE586678C (de) * 1932-02-21 1933-10-24 Franz Meiwald Strickmaschine mit Zungennadeln
JPS6059337A (ja) * 1983-09-13 1985-04-05 Fuji Xerox Co Ltd 複写機の複写倍率変倍装置
JPS6217514U (fr) * 1985-07-13 1987-02-02
JPS63177977U (fr) * 1987-05-06 1988-11-17

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE672512C (de) * 1936-10-18 1939-03-04 Dubied & Cie Sa E Strickmaschinennadel
DE3140386A1 (de) * 1981-10-10 1983-04-28 Theodor Groz & Söhne & Ernst Beckert Nadelfabrik KG, 7470 Albstadt "zungennadel fuer maschinen zur herstellung von maschenware"

Also Published As

Publication number Publication date
CA2020046C (fr) 1993-04-06
JPH055939B2 (fr) 1993-01-25
DE3921458C1 (fr) 1990-09-27
DE59003059D1 (de) 1993-11-18
CA2020046A1 (fr) 1990-12-31
US5090218A (en) 1992-02-25
EP0405130B1 (fr) 1993-10-13
JPH03220349A (ja) 1991-09-27
ES2045641T3 (es) 1994-01-16

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