EP0511455A2 - Vorrichtung zum Führen von elastischen Fäden an Häkelgalonmaschinen - Google Patents

Vorrichtung zum Führen von elastischen Fäden an Häkelgalonmaschinen Download PDF

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Publication number
EP0511455A2
EP0511455A2 EP91830384A EP91830384A EP0511455A2 EP 0511455 A2 EP0511455 A2 EP 0511455A2 EP 91830384 A EP91830384 A EP 91830384A EP 91830384 A EP91830384 A EP 91830384A EP 0511455 A2 EP0511455 A2 EP 0511455A2
Authority
EP
European Patent Office
Prior art keywords
needles
guide
elastic
reciprocating motion
yarns
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.)
Withdrawn
Application number
EP91830384A
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English (en)
French (fr)
Other versions
EP0511455A3 (en
Inventor
Luigi Omodeo Zorini
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0511455A2 publication Critical patent/EP0511455A2/de
Publication of EP0511455A3 publication Critical patent/EP0511455A3/en
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/10—Devices for supplying, feeding, or guiding threads to needles
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/10—Devices for supplying, feeding, or guiding threads to needles
    • D04B27/24—Thread guide bar assemblies

Definitions

  • the present invention relates to a guide device for elastic yarns in crochet galloon looms, of the type comprising at least a guide reed extending horizontally above a plurality of needles disposed mutually in side by side relation according to a horizontal plane and driven in reciprocating motion in the longitudinal direction, said guide reed exhibiting, on one front surface thereof, a plurality of vertical grooves disposed parallelly alongside each other, each of which slidably engages an elastic yarn so as to guide it towards a respective needle, and being rigidly connected to a supporting bar driven in horizontal reciprocating motion in order to transmit the elastic yarns a reciprocating motion astride of said needles.
  • the warp yarns are brought to the needles through respective drawing-in hooks located in front of the needles and reciprocating between the needle heads.
  • German Patent DE 3244014 A1 A guide device specifically conceived for solving the above problems is disclosed in German Patent DE 3244014 A1.
  • the auxiliary drawing-in hooks are replaced by at least a reed element extending horizontally above the needles.
  • This reed element has, on the lower end edge thereof, a front relief in which a plurality of vertical grooves disposed alongside each other is formed.
  • Each groove having a substantially rectangular transverse outline, lends itself to slidably engage one of the elastic yarns, the holding of the elastic yarn within the groove relying on the tensioning given to the elastic yarn by feed rollers operated at different peripheral speeds and acting on the elastic yarns upstream of the reed elements and the manufactured article downstream of the needles.
  • each yarn instead of being carried sideways according to the whole stroke travelled by the reed element, moves laterally within the groove thereby reducing the extent of the displacement it undergoes.
  • the elastic yarn impinged on by the needle might also disengage from the corresponding groove and permanently enter one of the adjacent grooves. In these cases it becomes necessary to stop the machine operation in order to correctly position the elastic yarn again.
  • the present invention aims at overcoming the above drawbacks.
  • each of said vertical grooves has a pair of slide surfaces joined at an angle the bisecting line of which is normal to said one front surface, and acting simultaneously at laterally opposite positions on the respective elastic yarn to hold it according to a predetermined positioning, that is in constant alignment relation with said bisecting line, irrespective of the diameter of the elastic yarn.
  • a guide device for elastic yarns in crochet galloon looms in accordance with the present invention has been generally identified by reference numeral 1.
  • the device 1 is associated with a conventional crochet galloon loom only the main members of which cooperating in knitting a manufactured article have been shown in Fig. 1.
  • the loom essentially comprises a plurality of needles 2, only one of which is shown, disposed parallelly in side by side relation in a horizontal plane, rigidly engaged to a needle bar 3 and operated through said bar in reciprocating motion in a longitudinal direction above a front plate 4.
  • tubular weft yarn guides 5 each of which slidably engages a weft yarn 5a for suitably guiding it to the needles 2.
  • the tubular weft yarn guides 5 are supported in a conventional manner by one or more tubular guide carriers 6 extending horizontally, parallelly to the needle bar 3 and at a raised position relative thereto.
  • the tubular guide carriers 6 are connected, at the opposite ends thereof, to two lifting plates 7, only one of which is shown, driven in vertical reciprocating motion.
  • the tubular guide carriers 6, longitudinally slidable relative to the lifting plates 7, are in addition driven in reciprocating motion in the longitudinal direction by further actuator means not shown as known per se and conventional.
  • the combination of the horizontal and vertical reciprocating motions transmitted to the tubular guide carriers 6 imparts a reciprocating motion astride of one or more of needles 2 to each tubular weft yarn guide 5.
  • drawing-in hooks 8 are also provided, each of them slidably engaging a warp yarn 8a in order to guide it to the needles 2.
  • the manufactured article obtained as a result of the above interlacing, denoted by 9, is dragged along by a conventional collection device not shown, between the front plate 4 and a collection guide 10.
  • the device 1 performs the function of suitably guiding a plurality of elastic yarns 11 to the needles 2 so that said elastic yarns may be suitably looped between the welf yarns 5a and warp yarns 8a.
  • the device 1 comprises at least a guide reed 12 extending horizontally above the needles 2 so that a lower edge 12a thereof is slightly spaced apart therefrom.
  • the guide reed 12 can be made in the form of a bar of a length corresponding to that of the tubular guide carriers 6 and needle-bar 2.
  • the presence of a plurality of guide reeds 12 can be provided, said reeds being disposed consecutively alongside each other in mutual alignment and each of them having a length corresponding to the quantity subtended by a predetermined number of needles 2.
  • the guide reed or reeds 2 are rigidly engaged by a connecting plate 13 to a supporting bar 14 the opposite ends of which are connected to the lifting plates 7.
  • the supporting bar 14 in known manner, is oscillatably operated in the longitudinal direction so as to impart a horizontal reciprocating motion to the guide reeds 12 according to an orientation transverse to the movement of needles 2. Still in known manner, the opposite ends of the supporting bar 14 may be provided to be connected to the lifting plates 7 of the tubular guide carriers 6 so as to impart the same movement as described with reference to the tubular weft yarn guides 5 to the guide reeds 12. Alternatively, the supporting bar 14 can be completely disengaged from the vertical movement of the lifting plates 7, the aide reeds 12 being therefore submitted to the horizontal motion alone.
  • Each guide reed 12 has, on the front surface thereof defined in the plane indicated by line "S" in Fig. 4, a plurality of vertical grooves 15 disposed in parallel side by side relation, each of which slidably engages one of the elastic yarns 11 in the longitudinal direction.
  • the vertical grooves 15 are spaced apart the same distace from each other, according to the same pitch as the needle spacing, so that each elastic yarn 11 is guided towards a respective needle 2.
  • each of the vertical grooves 15 is essentially defined by a pair of slide surfaces 15a, 15b joined together according to a predetermined angle " ⁇ ".
  • angle " ⁇ " is an acute angle the amplitude of which ranges between 60° and 90°. Angle values higher or lower than the above ones could cause the disengagement of the elastic yarns 11 from the grooves 15 or too great slide frictions between the elastic yarns and grooves, respectively. At all events angle “ ⁇ ” has a bisecting line “n" normal to the front surface "S" of the reed 12.
  • the front surface "S" of reed 12 is provided to have a substantially flat extension and each vertical groove 15 is provided to have a vertical extension H equal to at least 10 mm.
  • the vertical extension H of each groove 15 must be at least ten times the distance existing between the lower end 15c of the groove and the lying plane of needles 2, for purposes to be explained in the following.
  • each reed 12 is positioned so as to give rise to a alight deviation " ⁇ " in the longitudinal extension of the elastic yarns 11. Therefore the elastic yarns 11 will automatically tend to keep against the guide reed 12.
  • each yarn 11 is held so that its axis is coincident with the bisecting line "n" of angle " ⁇ ".
  • this condition is always maintained, independently of the diameter exhibited by the elastic yarn 11, as clearly illustrated in Fig. 4 where two yarns 11 having different diameters and engaged in respective grooves 15 are shown.
  • the yarns 11 lend themselves to be reciprocated astride of the corresponding needles 2 as a result of the horizontal oscillation imparted to the supporting bar 14, without any risk that one or more of said yarns may take wrong positionings relative to the loom members, and in particular relative to needles 2.
  • any risk of disengagement of one or more yarns 11 from the corresponding grooves due to the yarns being retained by the needles 2 is greatly reduced as well.
  • the length of each groove can advantageously make the yarn 11 be correctly held in the upper part of the groove itself. The elastic yarn 11 will be therefore subjected to enter again the respective groove 15 in the right way as soon as it is disengaged from the needle 2.
  • the selected length for grooves 15 also reduces all dangers of disengagement of the elastic yarns 11 due to their being impinged on by one or more needles 2.
  • the present invention attains the intended purposes.
  • the device in question by virtue of the use of grooves of a wedge-shaped outline and of great length, brings an important improvement to crochet galloon looms in terms of liability in use, as far as the production of elastic manufactured articles is concerned.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Wire Processing (AREA)
EP19910830384 1991-04-29 1991-09-18 A guide device for elastic yarns in crochet galloon looms Withdrawn EP0511455A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI911167 1991-04-29
ITMI911167A IT1248369B (it) 1991-04-29 1991-04-29 Dispositivo di guida per fili elastici in telai per galloni ad uncinetto

Publications (2)

Publication Number Publication Date
EP0511455A2 true EP0511455A2 (de) 1992-11-04
EP0511455A3 EP0511455A3 (en) 1993-03-17

Family

ID=11359796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910830384 Withdrawn EP0511455A3 (en) 1991-04-29 1991-09-18 A guide device for elastic yarns in crochet galloon looms

Country Status (2)

Country Link
EP (1) EP0511455A3 (de)
IT (1) IT1248369B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994011554A1 (de) * 1992-11-12 1994-05-26 Berger Gmbh, Treuchtlingen Vorrichtung an einer kettenwirkmaschine zum häkeln eines elastischen bandes mit flausch und gegebenenfalls zum häkeln von picos, sowie mit dieser vorrichtung hergestelltes elastisches band

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE831737C (de) * 1950-04-30 1952-02-18 Wand Kurt P Fadenriet
US3067480A (en) * 1957-09-18 1962-12-11 Spunize Company Of America Inc Yarn guide and crimper for textile machines
FR2318963A1 (fr) * 1975-07-22 1977-02-18 Bosse Platiere Marius Perfectionnements aux metiers a tricoter et aux tissus susceptibles d'etre obtenus sur ces metiers
DE3244014A1 (de) * 1982-11-27 1984-05-30 Johann 7071 Alfdorf Berger Haekelwerkzeuge zur herstellung von baendern auf einer haekelgalonmaschine
US4683727A (en) * 1986-03-07 1987-08-04 Comez S.P.A. Thread guide rail for crochet galloon machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE831737C (de) * 1950-04-30 1952-02-18 Wand Kurt P Fadenriet
US3067480A (en) * 1957-09-18 1962-12-11 Spunize Company Of America Inc Yarn guide and crimper for textile machines
FR2318963A1 (fr) * 1975-07-22 1977-02-18 Bosse Platiere Marius Perfectionnements aux metiers a tricoter et aux tissus susceptibles d'etre obtenus sur ces metiers
DE3244014A1 (de) * 1982-11-27 1984-05-30 Johann 7071 Alfdorf Berger Haekelwerkzeuge zur herstellung von baendern auf einer haekelgalonmaschine
US4683727A (en) * 1986-03-07 1987-08-04 Comez S.P.A. Thread guide rail for crochet galloon machines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994011554A1 (de) * 1992-11-12 1994-05-26 Berger Gmbh, Treuchtlingen Vorrichtung an einer kettenwirkmaschine zum häkeln eines elastischen bandes mit flausch und gegebenenfalls zum häkeln von picos, sowie mit dieser vorrichtung hergestelltes elastisches band
US5653127A (en) * 1992-11-12 1997-08-05 Berger Gmbh Device on a warp knitting machine for crocheting an elastic band with fleece and an elastic band produced by this device

Also Published As

Publication number Publication date
IT1248369B (it) 1995-01-11
ITMI911167A1 (it) 1992-10-29
ITMI911167A0 (it) 1991-04-29
EP0511455A3 (en) 1993-03-17

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