EP0285553B1 - Steuervorrichtung für die Strickstellung der Nadeln an einer Strickmaschine - Google Patents

Steuervorrichtung für die Strickstellung der Nadeln an einer Strickmaschine Download PDF

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Publication number
EP0285553B1
EP0285553B1 EP88810110A EP88810110A EP0285553B1 EP 0285553 B1 EP0285553 B1 EP 0285553B1 EP 88810110 A EP88810110 A EP 88810110A EP 88810110 A EP88810110 A EP 88810110A EP 0285553 B1 EP0285553 B1 EP 0285553B1
Authority
EP
European Patent Office
Prior art keywords
heels
cams
needle
heel
cam
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
EP88810110A
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English (en)
French (fr)
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EP0285553A1 (de
Inventor
Rémi Cottenceau
Erwin Zuercher
Jacques Vermot-Gaud
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.)
Sipra Patententwicklungs und Beteiligungs GmbH
Original Assignee
Sipra Patententwicklungs und Beteiligungs GmbH
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.)
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Publication date
Application filed by Sipra Patententwicklungs und Beteiligungs GmbH filed Critical Sipra Patententwicklungs und Beteiligungs GmbH
Publication of EP0285553A1 publication Critical patent/EP0285553A1/de
Application granted granted Critical
Publication of EP0285553B1 publication Critical patent/EP0285553B1/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
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements
    • D04B15/68—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the knitting instruments used

Definitions

  • the present invention relates to a device for controlling the knitting positions of the needles of a knitting loom in which each needle is mounted longitudinally sliding in a guide groove and comprises at least one rocker capable of oscillating between two stops and provided with two heels close to its respective ends, these heels being capable of projecting from this groove and being respectively and alternately retracted therein, this device comprising, selection means for bringing these rockers against one or the other of these stops and thus selectively place these heels in the projecting position, cams arranged opposite these rockers and drive means for producing a relative displacement between these cams and these needles, transverse to said guide grooves, so that these cams exert on the heels projecting from the pressures in the longitudinal direction of said grooves, following this relative displacement.
  • the object of the present invention is precisely to provide a solution in which the knitting needles are constantly guided in the two directions of movement along their respective grooves, which makes it possible to considerably reduce the friction of the needles in these grooves.
  • the present invention relates to a device for controlling the knitting positions of the needles of a knitting machine according to claim 1.
  • Figure 1 partially illustrates a knitting loom comprising a plurality of knitting needles 1 slidably mounted in parallel grooves 2 of a needle bed 3.
  • the needles of the tray (not shown) are mounted in radial grooves.
  • the needles 1 comprise, in this example, a fixed heel 4 engaged with a first cam track 5 and a rocker 6 mounted oscillating in a cutout 7 formed in the stem of the needle 1.
  • the bottom of this cutout 7 is flat while the two sides 7a, 7b adjacent to this bottom are formed by arcs of a circle whose center is substantially set back from the bottom of this cutout 7.
  • the rocker 6 has on its edge two sides 6a, 6b which form an obtuse angle between them, and are respectively adjacent to two arcs of circles 6c, 6d which have the same center and the same radius as the sides 7a, 7b of the cutout 7.
  • This rocker 6 has two shaped heels 8 and 9 of rectangular trapezium, the end face of which connects the two parallel and unequal sides is in the extension of the part of the needle rod 1 in which the cutout 7 is formed, when this heel is retracted in this cutout 7.
  • heel 8 or 9 East in its position taken out of the cutting 7 its parallel and unequal edges are perpendicular to the longitudinal axis of the needle 1.
  • the movement of the rocker 6 from one to the other of its limit positions s ' accompanies a longitudinal movement of the heels 8 and 9. This feature is very important, insofar as it allows in particular to perform the self-locking of the rocker, as will be explained later.
  • the selection member consists of a thin rod 10 slidably mounted through a cam 22 and the free end of which is capable of projecting out of the profile of this cam 22.
  • the other end of this rod 10 is fixed to an electrical conductor 12 disposed between the two poles of a permanent magnet 13.
  • This electrical conductor 12 is preferably constituted by a strip of copper or aluminum whose width of the rectangular section is placed in the plane of the air gap of the permanent magnet 13 in order to make the conductor more rigid in this plane.
  • this conductor is welded to ribbons 14 and 15 of CuAg forming elbows and whose sections are rotated by 90 ° relative to that of the conductive ribbon 12 to make them flexible in the plane of the air gap.
  • the ends of this conductor 12, 14, 15 are anchored to terminals 18 and 19 connected to the secondary of a transformer 16 whose primary is connected to a current pulse source 17.
  • the product ⁇ d ⁇ 1,8.10 ⁇ 4 whereas in the case of aluminum this same product ⁇ dr 0,73.10 ⁇ 4. It is therefore possible for the same movement of the rod 10 to reduce the pulse duration and therefore to increase the frequency.
  • the magnetic induction can also be brought to 0.8 Tesla and the current pulses can be 10A.
  • the end faces 8a of the trapezoidal heels 8 are bevelled, so that when the end of the rod 10 is advanced in the trajectory of the heels 8, the lower edge of these faces bevelled 8a meets the rod 10, and when moving in the direction of the arrow F1 this bevel acts on the rocker 6 like a cam which causes a slight displacement of this rocker 6 in the position illustrated by FIG. 4.
  • Figures 1 and 2 show that the mechanism initialization of the selection which has just been described in detail is associated with two cams 22 and 23 which are arranged on either side of the respective trajectories of the heels 8, 9 of the rockers 6.
  • the cam 22 has two substantially profiles parallel, one 24 lower and the other 25 upper.
  • the cam 23 has a profile 26 whose role will be explained later.
  • the actuating rod 10 of the selection initialization mechanism is movable between two positions, one in which it projects from the cam profile 25 to be in the trajectory of the heels 8 which then protrude from the cutouts 7 of the needles 1.
  • This selection initialization mechanism is preceded by a fixed cam 27 (FIGS. 1 and 2) disposed in the trajectory of the heels 9 in the out position of the cutouts 7.
  • Figure 1 is supplemented by greenhouse cams 28, capable of moving in a back and forth movement in the direction of the double arrow F2. Note also that following the actuating rod 10, the edge of the cam 25 has a recess 25a to allow the heels 8 to tilt in the cutout 7.
  • the parallel faces of the trapezoidal profile of the heel 8 are perpendicular to the longitudinal axis of the needle 1.
  • this cam 22 controls the movement of the needles 1 in the knitting position with a positive guidance of the needles when going up or down.
  • each needle 1 will comprise two rockers 6 each actuated by an actuating rod 10.
  • each rocker always having one of its two heels, we manage to make three different combinations.
  • a form of execution of this kind will be described subsequently in relation to a rectilinear trade. The transposition to the circular profession is obvious to the skilled person.
  • the variant of FIG. 6 relates to the adaptation of the selection device described in relation to FIGS. 1 to 6 to a straight loom. Given that in such a profession the needle bearing needle bed is fixed and that it is the cam carriage which moves alternately in both directions, the profile of these cams must be symmetrical with respect to the member. Selection.
  • This variant the operation of which is also identical to the embodiment of FIG. 1, will not be described again in its entirety, it will be limited to the only modifications necessary for the adaptation of this device to the rectilinear loom. In fact the actual selection mechanism remains unchanged, it is essentially the cam profiles which undergo modifications in relation to the felling or greenhouse cam. These cams 28, acting when the carriage which carries them moves from left to right (arrow F4) must be mounted retractable relative to the heels 8.
  • a second set of greenhouse or felling cams 28 ′ drawn in dashed lines are intended to come into the trajectory of the heels 8 by a movement perpendicular to the plane of the drawing when the carriage which carries these cams moves from right to left.
  • the respective cam profiles 5 and 25 must have an infection with respect to these greenhouse cams 28 ′ as they present with respect to cams 28.
  • a second set of cams 27 ′ is intended to actuate the heels 9 out, when the carriage moves in the opposite direction to that of arrow F4.
  • the cams 27 and 27 ′ are therefore also mounted in order to be able to move alternately perpendicular to the plane of the drawing, in order to deviate from the trajectory of the heels 9.
  • the cams 27 can be secured to the same mobile support as the greenhouse cams 28, while that the cams 27 ′ and 28 ′ may be integral with another mobile support.
  • Figures 7 to 10 The embodiment illustrated in Figures 7 to 10 is illustrated more schematically than the previous embodiment.
  • the various cams have been shown in different thicker dashed lines, the trajectory of each of the projecting heels of the guide groove, the trajectory of the other heels, retracted in this groove being drawn in thinner mixed lines.
  • Figures 8 and 10 show in profile the positions of the scales corresponding to the paths illustrated in Figures 7 and 9 respectively.
  • the mechanisms for selecting the position of the hands have no longer been shown since they may be similar to those which have been described previously.
  • a needle 31 comprising a fixed heel 32 and four movable heels 33, 34, 35 and 36 integral two by two with two rockers 37 and 38 mounted oscillating in two cutouts 39 and 40.
  • rockers are similar to the flip-flop 6 in FIG. 1 so that we will not return here to their particularities and their operation, the reader being able to refer to the detailed description made about them in relation to the first embodiment.
  • the trajectories of the three heels 32, 34 and 36 which project from the guide groove of the needle 31 have been drawn in thicker lines.
  • the trajectories of the other two heels 33 and 35 are drawn in thin mixed lines.
  • three heels necessarily protrude from the guide groove of the needle 31 and engage with the cams, the positive guidance of this needle actually uses two heels. In the displacement of the needle in the mesh position illustrated by FIG. 7, it is the heels 32 and 36 which carry out the guidance in the closed cam path.
  • the other two knitting positions are the stitch picking position, which consists in bringing out the heels 34 and 35 by retracting the heel 36. In this case, it is these two heels whose lower edge edges respectively engage with the profile 55 respectively 54 of the cam 44 which effect the positive control of the needle.
  • the upward movement is effected by acting on the face of lower edge of the heel 34 creating a torque tending to keep the opposite arm carrying the heel 34 against the bottom of the cutout 39 while the downward movement creates a torque in the other direction by acting on the upper edge face of the heel 35 of the rocker 38, creating a torque tending to keep the arm carrying the heel 36 in abutment against the bottom of the cutout 40.
  • the non-knitting position is carried out with the heels 32, 33 and 35 projecting out of the guide groove, the needle being guided by the upper and lower edge faces of the heels 33 respectively 32.
  • FIG. 9 illustrates the position of the cams for carrying out a mesh transfer of the needles from one needle bed to another.
  • the sliding cams 46 and 47 are lowered alternately and the cams 48 and 49 are brought to the plane of the other cams.
  • the cam 45 is retracted as well as one half of the cam 42.
  • FIG. 10 shows the position of the rockers 37 and 38 with the heels 33 and 36 in the projecting position outside the guide groove. In this case the needle is guided by the heels 32 and 36. It can be seen that during the descent of the needle there is an instant when the needle is not guided positively, but it is not a question here of l 'one of the three knitting positions, which is of no consequence.
  • the rocker 38 is actuated by the upper edge face of the heel 36, which tends to move the rocker 38 in its other stable position.
  • the heel 35 of the rocker 38 is behind the cam 44 which prevents this tilting.
  • the other transfer position corresponding to the needle bed which receives the transferred meshes according to the operation illustrated in FIGS. 9 and 10 consists in keeping the cams in the same position and bringing out the heels 33 and 35, the needle then being guided by the sole heel 35, but again this is not a knitting operation here and the positive guiding of the needle in this case does not correspond to a necessity.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Claims (3)

1. Steuervorrichtung für die Strickstellungen der Nadeln an einer Strickmaschine, in der jede Nadel in einem Führungskanal in Längsrichtung verschiebbar gelagert ist und wenigstens einen zur Verschwenkung zwischen zwei Anschlägen geeigneten Stößer mit zwei nahe seinen entsprechenden Enden angeordneten Füßen aufweist, die abwechselnd aus dem Nadelkanal vorstehen oder in diesen zurückgezogen sein können, enthaltend: Auswählmittel, um die Stößer gegen den einen oder anderen der Anschläge zu legen und dadurch die Füße wahlweise in die vorstehende Lage zu bringen und den Stößern gegenüberliegende Schloßteile und Antriebsmittel zur Herstellung einer Relativbewegung zwischen den Schloßteilen und den Nadeln quer zu den Führungskanälen derart, daß die Schloßteile als Ergebnis dieser Bewegung eine Kraft auf die vorstehenden Füße in der Längsrichtung ausüben, dadurch gekennzeichnet, daß jede Nadel außerdem einen festen Fuß aufweist und daß die Steuerung der Stellung der Nadel in Längsrichtung in ihrem Führungskanal dadurch erfolgt, daß gleichzeitig und konstant wenigstens zwei Schloßteile mit zwei Kanten, d.h. je einer oberen und einer unteren Kante von zwei aus dem Führungskanal herausragenden Füßen zur Anlage gebracht werden.
2. Steuervorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Verschwenkung des Stößers als Ergebnis des Drehmoments, das vom Druck dieses Schloßteils auf eine Kante des vorstehenden Fußes erzeugt wird, durch den einen oder anderen der Anschläge oder durch die Oberfläche eines Schloßteils begrenzt ist, das denjenigen Teil des Führungskanals abdeckt, in den der andere Fuß des Stößers zurückgezogen worden ist.
3. Steuervorrichtung nach Anspruch 1, dadurch gekennzeichnet daß jede Nadel zwei solche Stößer derart aufweist, daß zu jeder Zeit drei dieser Füße, nämlich ein fester Fuß und zwei bewegliche Füße, vom Führungskanal vorstehen, um durch Anlage von zwei Kanten, d.h. einer oberen und unteren Kante von zwei der drei Füße an zwei zugeordneten Schloßteilen wenigstens drei Strickstellungen wählen zu können.
EP88810110A 1987-03-06 1988-02-23 Steuervorrichtung für die Strickstellung der Nadeln an einer Strickmaschine Expired - Lifetime EP0285553B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH840/87 1987-03-06
CH840/87A CH670464A5 (de) 1987-03-06 1987-03-06

Publications (2)

Publication Number Publication Date
EP0285553A1 EP0285553A1 (de) 1988-10-05
EP0285553B1 true EP0285553B1 (de) 1991-12-18

Family

ID=4196430

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88810110A Expired - Lifetime EP0285553B1 (de) 1987-03-06 1988-02-23 Steuervorrichtung für die Strickstellung der Nadeln an einer Strickmaschine

Country Status (6)

Country Link
US (1) US4827740A (de)
EP (1) EP0285553B1 (de)
JP (1) JP2721674B2 (de)
CH (1) CH670464A5 (de)
DE (1) DE3866915D1 (de)
ES (1) ES2029728T3 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4007253A1 (de) * 1990-03-08 1991-09-12 Sipra Patent Beteiligung Strickmaschine
CZ280577B6 (cs) * 1991-12-30 1996-02-14 Uniplet, A.S. Okrouhlý pletací stroj
US5568738A (en) * 1995-11-28 1996-10-29 Pai Lung Machinery Mill Co., Ltd. Needle selection device of a circular knitting machine
DE19822862C2 (de) 1998-05-22 2001-05-17 Sipra Patent Beteiligung Strickmaschinennadel und damit ausgerüstete Strickmaschine
DE19822861C2 (de) * 1998-05-22 2001-05-17 Sipra Patent Beteiligung Platine für eine Rundstrickmaschine und dafür geeignete Auswähleinrichtung
DE10111930C2 (de) * 2001-03-13 2003-02-27 Groz Beckert Kg Systemteil
NO2567011T3 (de) * 2010-05-04 2018-04-14

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH389813A (fr) * 1962-07-11 1965-03-31 Beguin Rene Procédé pour la sélection des aiguilles d'une machine à tricoter et dispositif pour la mise en oeuvre de ce procédé
DE1804350A1 (de) * 1967-10-24 1970-05-14 Lebocey & Cie Georges Verfahren und Vorrichtung zum Auswaehlen der Stricknadeln oder der Strickhilfsmittel auf Strickmaschinen und mit dieser Vorrichtung versehene Strickmaschine
FR1594994A (de) * 1968-12-10 1970-06-08
GB1281391A (en) * 1969-02-25 1972-07-12 Bentley Machine Dev Company Lt Improvements in needle operating means in knitting machines
US3620047A (en) * 1969-05-19 1971-11-16 Warner Swasey Co Dial mechanism for knitting machine
ZA697680B (en) * 1969-10-31 1971-01-27 Gkn Mills Ltd Apparatus suitable for use in the moulding of concrete
DE2010973C3 (de) * 1970-03-09 1982-05-27 H. Stoll Gmbh & Co, 7410 Reutlingen Strickmaschine, insbesondere Flachstrickmaschine
US3779042A (en) * 1971-10-14 1973-12-18 Singer Co Circular knitting machines for producing a patterned fabric
DE2315334A1 (de) * 1973-03-28 1974-10-10 Stoll & Co H Strickmaschine, insbesondere flachstrickmaschine
DE2412497A1 (de) * 1974-03-15 1975-09-18 Singer Alemannia Maschf Elektromagnetisch-mechanische nadelauswahl-einrichtung fuer strickmaschinen
DE3406870C2 (de) * 1984-02-25 1986-06-12 H. Stoll Gmbh & Co, 7410 Reutlingen Flachstrickmaschine mit elektromechanischer Auswahl
DE3407965A1 (de) * 1984-03-03 1985-09-05 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Grillplatte
DD235891A1 (de) * 1985-04-01 1986-05-21 Textima Veb K Vielsystemige rundstrickmaschine, insbesondere r/l-grossrundstrickmaschine

Also Published As

Publication number Publication date
JP2721674B2 (ja) 1998-03-04
JPS63227843A (ja) 1988-09-22
US4827740A (en) 1989-05-09
DE3866915D1 (de) 1992-01-30
CH670464A5 (de) 1989-06-15
EP0285553A1 (de) 1988-10-05
ES2029728T3 (es) 1992-09-01

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