EP0278053B1 - Zungennadel für maschenbildende Textilmaschinen - Google Patents

Zungennadel für maschenbildende Textilmaschinen Download PDF

Info

Publication number
EP0278053B1
EP0278053B1 EP87114927A EP87114927A EP0278053B1 EP 0278053 B1 EP0278053 B1 EP 0278053B1 EP 87114927 A EP87114927 A EP 87114927A EP 87114927 A EP87114927 A EP 87114927A EP 0278053 B1 EP0278053 B1 EP 0278053B1
Authority
EP
European Patent Office
Prior art keywords
needle
latch
tongue
shank
spring element
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
EP87114927A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0278053A1 (de
Inventor
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
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 EP0278053A1 publication Critical patent/EP0278053A1/de
Application granted granted Critical
Publication of EP0278053B1 publication Critical patent/EP0278053B1/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 stitch-forming textile machines, with a needle shaft and a needle hook adjoining it at the end, with a tongue slot formed in the needle shaft and extending in the longitudinal direction of the needle and with a needle tongue pivotably mounted in the tongue slot at a bearing point about a transverse pivot axis, the one end carries a tongue spoon adjoining the tongue shaft and cooperating with the needle hook in the tongue closed position and the shaft of which has an end part extending from the region of the bearing point to the end facing away from the tongue spoon, and with an elongated spring element which in the area of its one end in a groove-like depression of the needle shaft adjoining the tongue slot is anchored and projects with its other free end into the tongue slot and, when the needle tongue is in the closed position, an associated support surface at the end part of the tongue shaft, wherein the needle tongue can be moved elastically by the spring element acting on it into a partially open intermediate position in which the axes of the tongue and needle shaft form an angle of preferably less than 90 °
  • Switch needles the needle tongue of which can be held in a partially open intermediate position by an associated spring element, have hitherto only been used in hand knitting apparatuses.
  • the partially open intermediate position of the needle tongue allows the knitted fabric to be cast on for the first time, i.e. at the beginning of the knitting process or when picking up stitches, an unimpeded insertion of the thread into the needle hook, without it being necessary to use a brush-shaped needle opener, which is otherwise common in knitting machines, or to open all needle tongues by hand before the knitted fabric is attached, which with involves a considerable amount of work.
  • both the end part of the tongue shaft interacting with the spring element and the spring element are worn, the wear occurring at the tongue end leading to rounding of the edges after a long period of operation and the wear of the spring element resulting in a reduction in the spring force, so that the time course the pivoting movement of the needle tongue is also uneven due to uneven friction conditions, which inevitably leads to an uneven stitch pattern.
  • a latch needle which is fundamentally unsuitable for high-speed flat knitting machines.
  • a steel wire spring is inserted in the tongue slot below the needle tongue in step heels open at the top at the two ends of the tongue slot so that it cannot move in the longitudinal and transverse directions.
  • Two flats attached to the end of the tongue cause the needle tongue to be pushed back into a partially open intermediate position after a closing or opening movement, in which the axes of the needle tongue and the needle shaft form an angle of approximately 45 ° with one another.
  • tongue needle type Spec. 145.124 G2 from which the invention is based and in which the needle tongue after each closing or opening movement by means of a round or flat - Or square spring formed spring element is pivoted back into an approximately half-open intermediate position in which the axes of the needle tongue and the needle shaft form an angle of approximately 90 ° with one another.
  • the spring element is at one end in the manner of a spring arm in a recessed in the top of the needle shaft and opening into the tongue slot Groove clamped by caulking.
  • the spring element presses against the upper side of the tongue shaft, which is essentially straight there, in the approximately semi-open intermediate position of approximately 90 ° in the area of the tongue bearing point.
  • the tongue is pivoted back into its fully open position from this intermediate position by the newly formed stitch, it presses the spring element freely movable on its front part downward with the top of the tongue shaft.
  • the spring element can pivot the needle tongue back into the half-open intermediate position, in which the needle tongue is elastically locked by the free end of the spring element which has returned to the starting position.
  • the stitch When the needle is pulled in, when the stitch hanging on the needle shaft, viewed relatively, slides in the direction of the needle hook, the stitch catches the needle tongue in its intermediate position and pivots it in the further course of the needle-pulling movement until its spoon rests on the hook and thus it is hers Has reached the closed position.
  • the free end of the spring element which is in permanent engagement with the tongue shaft, migrates on a contact surface of the tongue shaft end part from the area of the tongue bearing up to the vicinity of the front side of the tongue shaft end part, the spring element being simultaneously pressed upwards and thus being pretensioned .
  • the needle tongue is released with a stitch, so that the spring element acting on the contact surface on the tongue end part can in turn pivot the needle tongue back into its intermediate position.
  • the object of the invention is therefore to provide a latch needle with a latch which can be swiveled into a partially open intermediate position by an associated spring element and which is also suitable for high working speeds and thus, for example, for use in high-speed flat knitting machines, and is distinguished in that it is characterized by the fact that long Lifespan and precise method of working results in an even mesh pattern.
  • the latch needle mentioned at the outset is characterized according to the invention in that the end part of the latch shaft adjoins the support surface for the end of the spring element in the direction toward the top of the latch shaft or the end part, the needle latch at one starting from its intermediate position whose completely open position towards pivoting has a free surface, which in this pivoting at a distance from the end face of the with the end part of Tongue shaft otherwise disengaged spring element extends.
  • This configuration of the needle tongue ensures that the spring element only engages with the tongue end part as long as the needle tongue assumes a position in the pivoting range between its closed position and its intermediate position.
  • the latter is completely decoupled from the spring element, so that the needle tongue is freely movable until it is shortly before reaching the fully open position with the top of the tongue shaft hangs up on the spring element.
  • the newly formed stitch sliding over the needle tongue presses the spring element downwards, which gives the spring element a slight pretension.
  • the spring element thus placed under tension pivots the needle tongue back into its intermediate position, in which it is held by the spring element which engages over the contact surface on the tongue end part.
  • the use of the new latch needle in high-speed flat knitting machines has among other things the advantage that because of the automatic opening of the needle tongues from their closed position, the so-called tongue projection, which makes the knitting (stitch reduction) difficult, can be omitted. This enables a finer mesh formation. Because the needle tongue is initially pivoted not through the stitch but from the spring element from its fully open position towards its closed position, the needle tongue can be placed very flat on the needle shaft in the fully open position or even completely sunk in it that tight and tight stitches can be pulled effortlessly over the open needle tongue. This has a favorable effect on the quality of the goods.
  • the end part of the needle shaft advantageously has a recess extending from its top, through the edge of which at least the free surface is formed.
  • the arrangement can be such that the recess is arranged between the region of the bearing point and the end face of the end part of the tongue shank and is delimited by the open area opening into the top side and the contact surface starting from the end face.
  • the bearing surface can be on, below or above the longitudinal center plane of the axis extending through the center of the axis Needle tongue lie and be aligned at least approximately parallel to this. Otherwise, the mentioned recess can be obtuse-angled or essentially part-circular. Very simple conditions also result if the free surface is essentially part-circular, concave and / or convex, curved.
  • FIG. 1 to 3 show a latch needle according to the invention, partly in axial section, in a side view, in a detail and in a schematic representation, illustrating three different positions of the latch.
  • the latch needle has a needle shaft 1, which optionally carries a foot (not shown) and to which a needle hook 3 is connected via a needle neck 2.
  • a needle shaft 1 which has a rectangular cross-sectional shape, a tongue slot 4 is formed which extends in the longitudinal direction of the needle shaft and which, starting from the upper side of the needle shaft, extends to the underside of the needle shaft in such a way that there is an opening 5 on the underside of the needle shaft which serves to remove lint.
  • a needle tongue 6 is pivotally mounted on a transverse axis 7 at a bearing point.
  • the needle tongue 6 has a tongue shaft 8 which is provided at the bearing point with a bearing bore 9 which interacts with the axis 7 and carries a tongue spoon 10 at the end which cooperates with the needle hook 3 in the closed position.
  • a groove-like depression 11 extending from the upper side of the needle shaft is formed in the needle shaft 1, which extends in the longitudinal direction of the needle shaft and in which an elongated spring element 12 is anchored at one end, which projects with its other end 13 into the tongue slot 4.
  • the spring element 12 which is designed as a straight piece of spring wire in the illustrated embodiment, can also be a round, flat or square spring; as shown, it can be straight or curved or appropriately bent.
  • the end of the spring element 12 is firmly clamped at 14 by caulking.
  • the bottom 15 of the recess 11 is gently inclined toward the underside of the needle shaft in such a way that the end 13 of the spring element 12 lying in the tongue slot 4 is freely movable up and down.
  • the needle tongue 6 has an elongated end part 17 between the area of the bearing point at 9 and the end face 16 facing away from the spoon 10, such that the needle tongue 6 forms a double-armed lever which is pivotably mounted on the axis 7.
  • a short contact surface 18 is formed which extends from the end face 16 and runs essentially parallel to the longitudinal center plane of the needle tongue 6 arranged at 190 and is arranged slightly above the same.
  • a free surface 19 adjoins the contact surface 18 and opens onto the upper side 20 of the tongue shaft 8.
  • the two surfaces 18, 19 thus jointly delimit a recess 21 which extends in the end part 17 of the needle shaft 8, starting from the upper side 20, to the end face 16 and is arranged between the region of the bearing point at 9 and the end face 16.
  • the free surface 19 can be essentially concave or convexly curved. Alternatively, as shown, it can also be designed in sections with gently rounded transitions at its ends.
  • the length of the spring element 12 is selected such that it overlaps the contact surface 18 of the tongue end part 17 when the tongue 6 is in the closed position with the tongue spoon 10 resting on the needle hook 3, the spring element 12 simultaneously in the closed position of the needle tongue 6 compared to that in FIG. 1 shown relaxed state at its end 13 raised to something and is thus biased.
  • the spring element 12 acting on the bearing surface 18 can transfer the needle tongue 6 into the partially open intermediate position shown in FIG. 1, in which the position at 190 and 22nd illustrated longitudinal central axes of the needle tongue 6 or the needle shaft 1 enclose an angle 23 which is approximately 30 °, but in any case is less than 90 °. In this intermediate position, the needle tongue 6 is pivoted by the spring element 12.
  • the stitch hanging in the needle hook 3 runs onto the needle tongue 6 and, relative to FIG. 1, swivels clockwise, starting from the partially open intermediate position, as can be seen from FIG. 2, the Free space 19 at a predetermined distance from the end 13 of the spring element 12, which is otherwise disengaged from the needle tongue 6.
  • the needle tongue 6 can therefore carry out its pivoting movement starting from the intermediate position in the direction of the fully open position according to FIG. 3 completely freely, without it being influenced by the spring element 12.
  • the free movement of the needle tongue 6 in its swiveling movement from the intermediate position according to FIG. 1 towards the fully open position towards the spring element 12 does not necessarily have to limit a cut-out, obtuse-angled recess in the tongue end part 17, as was explained with the aid of the figures .
  • Embodiments are also conceivable in which the recess is of part-circular design, as is indicated, for example, by dashed lines in FIG. 2 at 21a.
  • the recess 21a is in the Areas of the upper side 20 of the tongue shaft 8 or its end part 17 are arranged, on which the bearing surface 18a starting from the end face 16 also lies.
  • part-circular recess 21a can also be combined with the underlying bearing surface 18 in such a way that it adjoins this.
  • bearing surface 18 it is also not absolutely necessary for the bearing surface 18 to be a flat surface. It can also be curved or form part of a semicircular recess.
  • the end part 17 of the tongue shaft 8 and the spring element 12 with its end 13 are dimensioned and arranged such that the end part 17 and the end 13 of the spring element 12 are in each position of the needle tongue 6 within its pivoting range remain in the tongue slot, ie not protruding downwards from breakthrough 5. This prevents that during the expulsion movement of the needle, the newly formed stitch sliding over the opening needle tongue 6 is hindered in its sliding movement in that the head of the old stitch hanging on this stitch gets caught on protruding parts on the back of the needle shaft.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP87114927A 1987-01-24 1987-10-13 Zungennadel für maschenbildende Textilmaschinen Expired - Lifetime EP0278053B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3702019 1987-01-24
DE3702019A DE3702019C1 (de) 1987-01-24 1987-01-24 Zungennadel fuer maschenbildende Textilmaschinen

Publications (2)

Publication Number Publication Date
EP0278053A1 EP0278053A1 (de) 1988-08-17
EP0278053B1 true EP0278053B1 (de) 1991-04-17

Family

ID=6319433

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87114927A Expired - Lifetime EP0278053B1 (de) 1987-01-24 1987-10-13 Zungennadel für maschenbildende Textilmaschinen

Country Status (8)

Country Link
US (1) US4791794A (enrdf_load_stackoverflow)
EP (1) EP0278053B1 (enrdf_load_stackoverflow)
JP (1) JPS63196748A (enrdf_load_stackoverflow)
KR (1) KR910001802B1 (enrdf_load_stackoverflow)
CN (1) CN1005343B (enrdf_load_stackoverflow)
CA (1) CA1293867C (enrdf_load_stackoverflow)
DE (2) DE3702019C1 (enrdf_load_stackoverflow)
ES (1) ES2021670B3 (enrdf_load_stackoverflow)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0242087U (enrdf_load_stackoverflow) * 1988-09-12 1990-03-23
DE3921775A1 (de) * 1988-09-28 1990-03-29 Schieber Universal Maschf Schiebernadel
DE4142003C1 (enrdf_load_stackoverflow) * 1991-12-19 1993-07-22 Theodor Groz & Soehne & Ernst Beckert Nadelfabrik Kg, 7470 Albstadt, De
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
DE10106989C2 (de) 2001-02-15 2003-04-24 Groz Beckert Kg Zungennadel mit fixierter Feder
DE10227533C1 (de) * 2002-06-20 2003-12-11 Groz Beckert Kg Nadel mit Umhängefeder
DE10232884B4 (de) * 2002-07-19 2004-05-27 Groz-Beckert Kg Zungennadel
EP1464746B1 (de) * 2003-04-03 2006-05-17 H. Stoll GmbH & Co. Nadel für Strickmaschinen und Verfahren zum Teilen einer Masche
DE10341630B4 (de) * 2003-09-10 2006-11-16 Groz-Beckert Kg Zungennadel
DE502004007675D1 (de) * 2004-07-14 2008-09-04 Groz Beckert Kg Maschinenbildungssystem und Platine für ein solches
DE102004049061B4 (de) * 2004-10-08 2006-08-24 Groz-Beckert Kg Zungennadel
EP1921189B1 (de) * 2006-11-09 2011-05-11 Groz-Beckert KG Maschinenstricknadel
EP2088228B1 (de) * 2008-02-05 2011-10-19 Groz-Beckert KG Zungennadel
JP6930719B2 (ja) * 2017-02-13 2021-09-01 オルガン針株式会社 ベラ針
EP3604651A1 (de) 2018-08-03 2020-02-05 Groz-Beckert KG Zungennadel
KR101941122B1 (ko) * 2018-08-27 2019-01-22 이일영 편기용 니들 및 이를 갖는 환편기
CN109700090B (zh) * 2019-01-31 2021-01-19 北京跃强工贸有限公司 一种流苏毛衣制作工艺以及穿设梳

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60605C (de) * H. KÖHLER in Mühlhausen, Thür., Erfurterstr. 43 Zungennadel mit selbstöffnender Zunge für Strickmaschinen
GB189324311A (en) * 1893-12-18 1894-10-13 Alfred Lee Improvements in Latch Knitting Needles Used in Hosiery Knitting Machines and other similar Knitting Machines.
US1732469A (en) * 1927-05-10 1929-10-22 Rollins Hosiery Mills Needle for repairing runs in knitted fabrics
FR664110A (fr) * 1927-12-03 1929-08-29 Perfectionnements aux aiguilles ou crochets pour la confection de tapis ou analogues
US1780790A (en) * 1928-07-17 1930-11-04 Gotham Knitbac Machine Corp Knitting needle
US1764406A (en) * 1928-08-02 1930-06-17 Gotham Knitbac Machine Corp Knitting needle
US1823906A (en) * 1928-08-14 1931-09-22 Gotham Knitbac Machine Corp Knitting needle
DE664110C (de) * 1936-08-19 1938-08-20 Jagenberg Werke Ag Verfahren und Vorrichtung zum Aufrichten flach gelegter Schachteln
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
US3050968A (en) * 1959-06-16 1962-08-28 Masujima Ryozo Knitting needles
GB1017413A (en) * 1962-10-09 1966-01-19 Kintslaid Engineering Company Improvements in or relating to a compound needle
JPS4913944A (enrdf_load_stackoverflow) * 1972-05-19 1974-02-06
DE2650985A1 (de) * 1975-11-12 1977-05-26 Singer Co Zungennadel

Also Published As

Publication number Publication date
KR910001802B1 (ko) 1991-03-26
ES2021670B3 (es) 1991-11-16
CA1293867C (en) 1992-01-07
JPH0223619B2 (enrdf_load_stackoverflow) 1990-05-24
KR880009156A (ko) 1988-09-14
JPS63196748A (ja) 1988-08-15
US4791794A (en) 1988-12-20
CN88100313A (zh) 1988-08-03
DE3702019C1 (de) 1987-09-24
EP0278053A1 (de) 1988-08-17
CN1005343B (zh) 1989-10-04
DE3769465D1 (de) 1991-05-23

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