EP0547331B1 - Zungennadel für maschenbildende Textilmaschinen - Google Patents

Zungennadel für maschenbildende Textilmaschinen Download PDF

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Publication number
EP0547331B1
EP0547331B1 EP92117899A EP92117899A EP0547331B1 EP 0547331 B1 EP0547331 B1 EP 0547331B1 EP 92117899 A EP92117899 A EP 92117899A EP 92117899 A EP92117899 A EP 92117899A EP 0547331 B1 EP0547331 B1 EP 0547331B1
Authority
EP
European Patent Office
Prior art keywords
latch
needle
tongue
opening
axis
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
EP92117899A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0547331A2 (de
EP0547331A3 (de
Inventor
Siegmund Sos
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 EP0547331A2 publication Critical patent/EP0547331A2/de
Publication of EP0547331A3 publication Critical patent/EP0547331A3/de
Application granted granted Critical
Publication of EP0547331B1 publication Critical patent/EP0547331B1/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 tongue which is pivotably mounted in a tongue slot of the needle shaft by means of a guer-extending axis, which at one end carries a tongue spoon which adjoins a tongue shaft and which cooperates with the needle hook in the tongue closed position and whose tongue shaft is formed with a bearing bore and has an end part extending from the region of the bearing bore to the end facing away from the tongue spoon, and with an elongated spring element which is anchored in the region of one end of the needle shaft and with its other free end in the Tongue slit protrudes and, at least when the needle tongue is in the closed position, overlaps an associated support surface on the end part of the tongue shaft, the needle tongue being able to be elastically converted into a partially open intermediate position by the spring element acting on it.
  • a latch needle with these features is known from DE-PS 37 02 019.
  • the partially open intermediate position of the needle tongue allows an unimpeded insertion of the thread into the needle hook when the knitted fabric is cast on for the first time, ie at the beginning of the knitting process or when picking up stitches, as is explained in detail in this patent specification.
  • the needle tongue is pivotally mounted with its bearing bore on the axis, which in turn is formed by a cylindrical pin rotatably inserted into corresponding bores in the needle shaft cheeks laterally delimiting the tongue slot or by essentially cylindrical shapes of the needle shaft cheeks which protrude into the bearing bore.
  • the tongue shaft Since a certain bearing play is required between the axis and the bearing bore with a view to the smooth movement of the needle tongue, the tongue shaft must be guided relatively exactly laterally in the tongue slot.
  • the contact surface also becomes small for the end of the spring element, because it must always be ensured that the bearing bore is surrounded on all sides by a sufficiently strong bearing shell.
  • the exact positioning of the end of the spring element on such a small contact surface of the needle tongue sometimes causes difficulties in mass production, which can lead to the end of the spring element missing the contact surface, which leads to defects in the knitted fabric and the latch needle immediately unusable.
  • the object of the invention is therefore to remedy this situation and to create a latch needle which, even with smaller needle sizes, ensures perfect interaction of the spring element with the latch, without placing excessive demands on the manufacturing accuracy, in particular of the latch slot.
  • the latch needle mentioned at the outset is characterized according to the invention in that the latch shaft has in the region of its end part an open-ended opening extending into the bearing bore, on the edge of which the bearing surface is arranged, and in that the latch shaft with the corresponding holes in the Tongue slot limiting needle shaft cheeks rotatably mounted axis is rigidly connected.
  • the latch and the axis form an inseparable unit, so that a lateral Tilting or deflecting the needle tongue during the pivoting movement to a harmful degree is not possible because the stub shaft of the axle, which is rotatably mounted in the holes in the needle shaft cheeks, can be fitted into the holes in a tolerated manner without great effort. Therefore, the precision of the longitudinal needle slot no longer has to be high, because it no longer needs to guide the tongue shaft laterally. In addition, because of the rigid connection between the needle tongue and the axis, the usual measures for captive securing of the axis in the needle shaft cheeks are eliminated.
  • the bearing surface for the end of the spring element can extend directly to the axis, with the result that even with small needle sizes, a sufficiently large bearing surface for the Spring element is available.
  • the idea of the invention is not limited to small needle sizes; it can be used reliably for all needle sizes.
  • latch needles are known in which the needle tongue is formed with a slot-like opening protruding into its bearing bore.
  • these latch needles are not equipped with a spring element which interacts with the needle latch.
  • the needle tongue is pivotally mounted on an axis connected to the needle shaft in a rotationally fixed manner, in one case the aim being to achieve interchangeability of the needle tongue through the open design of the so-called tongue eye, while in another case, the thin, plastically deformable tongue shaft is bent in the manner of an eyelet around the axis formed integrally on the needle shaft.
  • the opening in the region of the end part of the latch shaft is advantageously designed to widen outwards from the bearing bore, the opening angle of the opening border being approximately 60 ° in a preferred embodiment.
  • the arrangement can expediently be such that the opening is delimited by two legs of the end part of the tongue shaft, of which the leg opposite the back of the tongue shaft bears the bearing surface on its inside, while the leg opposite the bearing surface is shortened in the tongue longitudinal direction. It is advantageous if the shortened leg is rounded at the end.
  • the tongue shaft can be rigidly connected to the axis in any manner appropriate per se. Simple manufacturing relationships result when the tongue shaft on the axis in particular by means of Laser spot welding is welded on.
  • FIG. 1 to 4 show a latch needle according to the invention, illustrating four different latch positions, each in a schematic partial representation, in a side view and partially cut away.
  • 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 an opening 5 is provided on the underside of the needle shaft for lint removal.
  • a needle tongue 6 is pivotally mounted at a bearing point by means of a transverse axis 7.
  • the axis 7 is designed in the form of a cylindrical steel pin which is rotatably mounted in cylindrical bores 8, which are aligned with one another, of the needle shaft cheeks 9 which delimit the tongue slot 4 on both sides, with little bearing play.
  • the needle tongue 6 has a tongue shaft 10, which is provided at the bearing point with a transverse, continuous bearing bore 11 assigned to the axis 7 and at the end carries a tongue spoon 12 which cooperates with the needle hook 3 in the closed position, as shown in FIG. 2 is illustrated.
  • a groove-like depression 13 which extends from the top of the needle shaft and extends in the longitudinal direction of the needle shaft and in which an elongated spring element 14 is anchored at one end, which is anchored at its other end 15, is formed in the needle shaft 1 protrudes into the tongue slot 4.
  • the spring element 14, 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 14 is firmly clamped at 16 by caulking.
  • the bottom 17 of the recess 13 is gently inclined toward the underside of the needle shaft in such a way that the end 15 of the spring element 14 lying in the tongue slot 4 can be freely moved up and down.
  • the tongue shaft 10 has an extended end part 18 (FIG. 3) in the area between the bearing bore 11 and the end face remote from the spoon 12, such that the needle tongue 6 forms a double-armed lever which is pivotably mounted by means of the axis 7.
  • an opening 20 opening from the end face at 19 is formed, which extends into the bearing bore 11, in such a way that the bearing shell surrounding the axis 7 on the side of the needle tongue 6 facing away from the tongue spoon 12 is removed in the region of the opening 20 is.
  • the bearing bore 11 is opened through the opening 20 over a circumferential area of approximately 120 °, as indicated at 21 in FIG. 3.
  • the opening 20 itself, starting from the bearing bore 11, is designed to widen in the shape of a wedge, the opening angle of the opening boundary indicated at 22 being approximately 60 °. It allows two legs 23, 24 to emerge in the end part 18 of the needle tongue 6, which open the opening limit and of which the leg 23 opposite the back 25 of the tongue shaft 10 carries on its inner side which forms part of the opening boundary a bearing surface 26 for the end 15 of the spring element 14.
  • the bearing surface 26 is aligned substantially flat and parallel to the front 27 of the tongue shaft 10.
  • the leg 24 opposite the support surface 26 is shortened in the tongue longitudinal direction; it is rounded at the end at 28, so that its inner surface forming part of the edge of the opening 22 is subsequently formed over a rounded region at 28 on the back 25 of the tongue shaft 10.
  • the needle tongue 6 is rigidly connected to the axis 7.
  • the tongue shaft 10 is welded to the axis 7 by means of laser spot welding.
  • the welding points are indicated at 29 in FIG. 4.
  • the assembly is carried out in such a way that after inserting the cylindrical axis 7 into the bores 8 of the needle shaft cheeks 9, the needle tongue 6 is pushed onto the axis 7 from above in a position in which its longitudinal axis is at an angle of approximately 90 with the longitudinal axis of the needle shaft ° includes, whereupon the weld at 29 is carried out from below through the opening 5 by means of a laser.
  • the needle tongue 6 thus forms an inseparable unit with the welded axis 7, which is captive via the bores 8 and the axis 7 in the tongue slot 4 and can be pivoted about the axis 7 is stored.
  • the bearing play between the cylindrical axis 7 and the cylindrical bores 8 is dimensioned appropriately, so that on the one hand easy mobility of the needle tongue 6 is ensured and on the other hand lateral tilting or deflection of the needle tongue 6 during the pivoting movement are avoided.
  • the length of the spring element 14 is selected such that it overlaps the contact surface 26 of the tongue end part 18 when the needle tongue 6 is in the closed position (FIG. 2), with the spring element 14 at the same time In the closed position of the needle tongue 6, compared to the relaxed state shown in FIG. 1, its end 15 is raised upwards somewhat and is thus prestressed.
  • the needle tongue 6 If, starting from this closed position, the needle tongue 6 is released, it can be transferred from the prestressed spring element 14 to the partially open intermediate position shown in FIG. 1, in which the longitudinal central axes of the needle tongue 6 and the needle shaft 1 form an angle of approximately 30 ° include with each other as indicated at 30.
  • the size of this angle depends on the respective needle construction; in any case, it is less than 90 °.
  • the support surface 26 extends from the end face 19 to the axis 7 directly because of the opening 20, it is sufficiently long, even with small needle sizes, for a secure engagement to ensure the end 15 of the spring element 14.
  • the needle tongue 6 is pivoted clockwise from the stitch hanging in the needle hook 3, starting from the intermediate position according to FIG. 1, in the direction of the fully open position according to FIG. 4, the support surface 26 rises from it End 15 of the spring element 14. Since the opening 20, starting from the bearing bore 11, widens towards the outside towards the funnel-shaped end face 19, and since the second leg 24, rounded at the end at 28 and opposite the support surface 26, is correspondingly short, the needle tongue 6 can be completely free Execute from the intermediate position (Fig. 1) pivotal movement towards the fully open position shown in FIG. 4, without being affected by the spring element 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP92117899A 1991-12-19 1992-10-20 Zungennadel für maschenbildende Textilmaschinen Expired - Lifetime EP0547331B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4142003A DE4142003C1 (enrdf_load_stackoverflow) 1991-12-19 1991-12-19
DE4142003 1991-12-19

Publications (3)

Publication Number Publication Date
EP0547331A2 EP0547331A2 (de) 1993-06-23
EP0547331A3 EP0547331A3 (de) 1993-06-30
EP0547331B1 true EP0547331B1 (de) 1996-01-10

Family

ID=6447514

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92117899A Expired - Lifetime EP0547331B1 (de) 1991-12-19 1992-10-20 Zungennadel für maschenbildende Textilmaschinen

Country Status (6)

Country Link
US (1) US5239844A (enrdf_load_stackoverflow)
EP (1) EP0547331B1 (enrdf_load_stackoverflow)
JP (1) JP2589038B2 (enrdf_load_stackoverflow)
CA (1) CA2084362C (enrdf_load_stackoverflow)
DE (2) DE4142003C1 (enrdf_load_stackoverflow)
ES (1) ES2082324T3 (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE10341630B4 (de) * 2003-09-10 2006-11-16 Groz-Beckert Kg Zungennadel
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
US7757516B1 (en) 2005-11-21 2010-07-20 Hbi Branded Apparel Enterprises, Llc Abrasive knitting needle and sinker
US7757515B1 (en) 2009-03-11 2010-07-20 Hbi Branded Apparel Enterprises, Llc Cut pile fabric and method of making same
EP3604651A1 (de) * 2018-08-03 2020-02-05 Groz-Beckert KG Zungennadel

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD25292A (enrdf_load_stackoverflow) *
US219012A (en) * 1879-08-26 Improvement in knitting-machine needles
DE271699C (enrdf_load_stackoverflow) *
US1032613A (en) * 1911-06-24 1912-07-16 John J Tuller Latch knitting-needle.
US1163296A (en) * 1914-02-13 1915-12-07 Louis N D Williams Knitting-machine.
DE413459C (de) * 1924-06-27 1925-05-14 Christian Speidel Zungennadel mit auswechselbarer Zunge fuer Strickmaschinen u. dgl.
GB229204A (en) * 1924-08-12 1925-02-19 Christian Speidel Latch needle with interchangeable latch for knitting machines and the like
CH165483A (fr) * 1933-03-06 1933-11-30 Agula Sa Aiguille à palette pour machines à tricoter.
FR862825A (fr) * 1940-01-10 1941-03-17 Dispositif pour le nouage de fils
US2711218A (en) * 1950-09-21 1955-06-21 Vitoux Marcel Method of mounting pivoted latches on self-acting needles for knitting and relooping machines
DE1166919B (de) * 1962-11-02 1964-04-02 Siemens Ag Bandagiernadel fuer die Wickelkoepfe elektrischer Maschinen
DE3702019C1 (de) * 1987-01-24 1987-09-24 Groz & Soehne Theodor Zungennadel fuer maschenbildende Textilmaschinen
JPH0223619A (ja) * 1988-07-12 1990-01-25 Seiko Epson Corp 半導体装置の製造方法

Also Published As

Publication number Publication date
JP2589038B2 (ja) 1997-03-12
DE59205016D1 (de) 1996-02-22
ES2082324T3 (es) 1996-03-16
DE4142003C1 (enrdf_load_stackoverflow) 1993-07-22
US5239844A (en) 1993-08-31
JPH0657606A (ja) 1994-03-01
CA2084362A1 (en) 1993-06-20
CA2084362C (en) 1995-02-07
EP0547331A2 (de) 1993-06-23
EP0547331A3 (de) 1993-06-30

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