EP1643026B1 - Machine à tricoter avec un système magnétique de sélection d'aiguilles pour produire des tissus tricotés à motifs - Google Patents

Machine à tricoter avec un système magnétique de sélection d'aiguilles pour produire des tissus tricotés à motifs Download PDF

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Publication number
EP1643026B1
EP1643026B1 EP20040023520 EP04023520A EP1643026B1 EP 1643026 B1 EP1643026 B1 EP 1643026B1 EP 20040023520 EP20040023520 EP 20040023520 EP 04023520 A EP04023520 A EP 04023520A EP 1643026 B1 EP1643026 B1 EP 1643026B1
Authority
EP
European Patent Office
Prior art keywords
needle
selection
bed
magnet arrangement
knitting machine
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
EP20040023520
Other languages
German (de)
English (en)
Other versions
EP1643026A1 (fr
Inventor
Ulrich Dipl.-Ing. Daub
Manfred Buck
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.)
H Stoll GmbH and Co KG
Original Assignee
H Stoll GmbH and Co 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 H Stoll GmbH and Co KG filed Critical H Stoll GmbH and Co KG
Priority to DE200450007789 priority Critical patent/DE502004007789D1/de
Priority to EP20040023520 priority patent/EP1643026B1/fr
Priority to CNB2005101084128A priority patent/CN100519867C/zh
Publication of EP1643026A1 publication Critical patent/EP1643026A1/fr
Application granted granted Critical
Publication of EP1643026B1 publication Critical patent/EP1643026B1/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
    • 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
    • D04B15/78—Electrical devices

Definitions

  • the invention relates to a knitting machine, in particular a flat knitting machine according to the preamble of claim 1.
  • Knitting machines with needle selection systems are for example in the DE-AS 1 585 206 and in the DE-PS 36 14 220 described. These systems are characterized by the fact that with the aid of permanent magnets, a holding force for the selection elements of the needles of the knitting machine are generated. In certain areas of the permanent magnets, the holding force can be compensated by means of electromagnetic coils, so that the needle selection elements can be dropped at these locations by the needle selection system. Depending on the knitting pattern currently selected, certain needles are thus selected using the needle selection system and others are not. It is important that the coils are energized to compensate for the holding force of the permanent magnet so that the magnetic field for the one needle selection element that is to fall off, is compensated in the correct strength.
  • the DE 40 24 742 A1 also describes a knitting machine having a needle selection system that includes permanent magnets for attracting needle selection elements and solenoids for ejecting needle selection elements.
  • the current through the coils of the electromagnets is controllable.
  • ferromagnetic intermediate elements are arranged opposite the needle selection system in the area of the needle selection elements. However, such ferromagnetic components are absent in the peripheral regions of the movement space of the needle selection system.
  • the present invention has for its object to improve a knitting machine with a needle selection system of the type mentioned in such a way that is guaranteed without a power regulation safe ejection of the desired needle selection elements in all cases occurring.
  • the energization of the at least one coil in the discharge area of the selection system with a constant current profile eliminates the need for measuring devices or evaluations of the patterning program, so that the needle selection system becomes simpler in design and control technology. Nevertheless, the needle selection system is just as reliable as the known needle selection systems with current regulation. This is achieved by the magnetic damping of the selection magnet arrangement being approximately constant over its entire range of motion.
  • Magnetic damping primarily occurs through the ferromagnetic material of the needle bed or needle cylinder or a selection board bed. Further magnetic damping is produced by the selection elements currently attracted by the selection magnet arrangement. If, therefore, the primary magnetic damping is kept constant over the entire range of motion of the needle selection system, it is no longer necessary to determine how many needle selection elements have just been tightened. According to the invention, a constant primary damping is achieved in that the selection magnet arrangement is disposed opposite to ferromagnetic material over its entire range of motion.
  • the ferromagnetic components may be formed by a needle bed grooved to the needle guide or a grooved selection board bed and ungreased areas of the needle bed or selection board bed.
  • the needle beds or selection board beds are extended on both sides beyond the grooved area.
  • the selection magnet arrangement faces ferromagnetic material over its entire path, which extends beyond the needle area on both sides, which effects uniform damping of the permanent magnetic field.
  • the ferromagnetic components can be formed by the grooved area of a needle bed or a selection board bed of a flat knitting machine and ferromagnetic strips arranged laterally of the grooved area.
  • the strips may preferably have the same thickness as the needle bed or the selection board bed and at least the same width as the selection magnet arrangement.
  • Another way to achieve the most homogeneous possible primary attenuation of the magnetic field of the selection magnet arrangement is to select the distance between the selection magnet arrangement and the un-grooved areas of the needle bed or selection board bed or the strips in such a way that the selection magnet arrangement over these areas or strips the same magnetic damping is experienced as by the ferromagnetic material of the grooved area of the needle bed or selection board bed.
  • Different damping properties due to the use of the bed in comparison to an un-groomed area of the bed or a bar attached to the bed can thereby be compensated.
  • Fig. 1 shows a needle selection system 100 of a flat knitting machine, of which a needle bed 3 is shown in cross section.
  • the needle bed 3 is cut so that a needle channel 31 is visible.
  • a needle 4 is guided longitudinally displaceable.
  • a needle movement initiating board 5 and a pusher 6 are also longitudinally displaceable and also arranged to be movable perpendicular thereto.
  • a selection board 7 is provided, which can also perform a pivotal movement in addition to a sliding movement along the channel 31.
  • the selection board 7 bears against a contact surface 71 on the underside of the needle selection system 1. It is held in this position by magnetic forces against the force of a leg spring 8.
  • the selection board 7 In the illustrated Position is the selection board 7 inactive. If, on the other hand, it wishes to select the needle 4 assigned to it, the magnetic force of the needle selection system 1 is compensated electromagnetically. The board 7 then pivots due to the force of the leg spring 8 in its active position. In this position, it can then cause a propulsion of the needle 4 by the action of lock curves.
  • the needle selection system 1 is rigidly fastened to a carriage 2, which is only schematically indicated here. Between the magnetic poles of the selection system and the top of the needle bed 3, which consists of a ferromagnetic material, preferably made of steel, a gap of the width Z2 is provided, which is constant over the entire needle bed length.
  • Fig. 2 It illustrates a construction of the needle selection system 1. It has a selection magnet arrangement 10 with a holding region H within which needle selection elements, here the needle selection plates 7, are held by the magnetic force of at least one permanent magnet 12. Within the holding area H are also two discharge areas 11, 11 '. In these areas, by exciting electromagnetic coils 13, the magnetic force of the permanent magnet 12 can be compensated so that the selection boards 7 are dropped from the needle selection system 1.
  • the needle selection system 1 moves in the direction of arrow X over the needle bed 3 away.
  • the selection board 7 ' is not yet within the influence range of the selection magnet arrangement 10.
  • the selection board 7 " has been dropped off at one of the discharge points 11, 11. It is now located at a distance below a slide strip 11 which closes the permanent magnet 12 downwards.
  • the selection boards 7 rest against the sliding strip 11. With Z2 again the distance of the needle bed 3 to the pole face of the selection magnet assembly 10 is designated.
  • the magnetic field formed by the permanent magnet (s) 12 undergoes primary damping by the ferromagnetic material of the needle bed 3 and further secondary damping by the selection boards 7.
  • Fig. 3 is shown in a view from above the needle selection system 1 in its extreme end position. It has moved so far beyond the needle bed 3 in the direction of the arrow X that the outermost selection board 7 can be influenced by the innermost discharge area 11 'of the selection system 1. At least to this position must in the needle selection device according to the invention, in which the magnetic coils 13 are applied in the region of the drop zones 11, 11 'with a constant current profile, the needle selection system 1 is a primary attenuation by the ferromagnetic material obtained, so that a safe ejection of the guaranteed to be activated needle selection elements.
  • the needle bed 3 has been extended laterally over the grooved area in the illustrated example.
  • the distance of the ungrooved area 3 'to the selection magnet arrangement 10 can be different from the distance Z2 to the grooved area of the needle bed 3.
  • a selection board bed can also be provided, via which the needle selection takes place. If, for structural reasons, the needle bed 3 can not laterally extend beyond the grooved area, strips of ferromagnetic material not shown here can also be arranged laterally of the needle bed 3, which preferably have the same thickness and at least the width of the selection magnet arrangement 10.
  • the distance between the bar and the selection system 1 can be constant or adjustable.

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

Claims (6)

  1. Machine à tricoter, en particulier machine à tricoter rectiligne, comprenant un dispositif modèle ayant un système de sélection d'aiguilles, comprenant au moins un dispositif magnétique de sélection (10) qui présente au moins une zone de retenue à aimants permanents (H) et au moins une zone d'éjection (11, 11') à laquelle est associée au moins une bobine (13, 13') pouvant être commandée, sachant que des éléments de sélection d'aiguilles (7, 7', 7") peuvent être attirés contre le dispositif magnétique de sélection (10) et que des composants (3, 3') composés d'un matériau ferromagnétique sont disposés face au dispositif magnétique de sélection (10 ), caractérisée en ce que, lors de l'éjection d'un élément de sélection d'aiguille (7, 7', 7"), l'au moins une bobine (13, 13') est commandée avec un profil d'intensité de courant constant, dépendant du nombre d'éléments de sélection d'aiguille (7) attirés respectivement par le dispositif magnétique de sélection (10) et en ce que les composants (3, 3') composés d'un matériau ferromagnétique sont disposés face à l'au moins un dispositif magnétique de sélection (10) sur toute sa zone de mouvement de telle sorte que l'amortissement magnétique du dispositif magnétique de sélection (10) soit approximativement constant sur toute sa zone de mouvement.
  2. Machine à tricoter selon la revendication 1, caractérisée en ce que les composants ferromagnétiques sont formés par un plateau à aiguilles (3) riveté pour le guidage des aiguilles ou par une platine de sélection et par les zones non rivetées du plateau à aiguilles (3) ou de la platine de sélection d'une machine à tricoter rectiligne.
  3. Machine à tricoter selon la revendication 1, caractérisée en ce que les composants ferromagnétiques sont formés par la zone rivetée d'un plateau à aiguilles (3) ou d'une platine de sélection d'une machine à tricoter rectiligne et par des baguettes ferromagnétiques disposées à côté de la zone rivetée.
  4. Machine à tricoter selon la revendication 3, caractérisée en ce que les baguettes présentent la même épaisseur que le plateau à aiguilles (3) ou que la platine de sélection et au moins la même largeur que le dispositif magnétique de sélection (10 ).
  5. Machine à tricoter selon la revendication 3 ou 4, caractérisée en ce que la distance entre le dispositif magnétique de sélection (10) et la zone rivetée du plateau à aiguilles (3) ou de la platine de sélection est différente de la distance entre le dispositif magnétique de sélection (10) et la zone non rivetée (3') du plateau à aiguilles (3) ou de la platine de sélection ou des baguettes.
  6. Machine à tricoter selon l'une des revendications 3 à 5, caractérisée en ce que la distance entre le dispositif magnétique de sélection (10) et les zones non rivetées (3') du plateau à aiguilles (3) ou de la platine de sélection ou des baguettes est telle que le dispositif magnétique de sélection (10), au-dessus de ces zones (3') ou baguettes, subit le même amortissement magnétique que par le matériau ferromagnétique de la zone rivetée du plateau à aiguilles (3) ou de la patine de sélection.
EP20040023520 2004-10-02 2004-10-02 Machine à tricoter avec un système magnétique de sélection d'aiguilles pour produire des tissus tricotés à motifs Expired - Lifetime EP1643026B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE200450007789 DE502004007789D1 (de) 2004-10-02 2004-10-02 Strickmaschine mit einer Mustereinrichtung und einem magnetischen Nadelauswahlsystem
EP20040023520 EP1643026B1 (fr) 2004-10-02 2004-10-02 Machine à tricoter avec un système magnétique de sélection d'aiguilles pour produire des tissus tricotés à motifs
CNB2005101084128A CN100519867C (zh) 2004-10-02 2005-10-08 具有提花设备的针织机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20040023520 EP1643026B1 (fr) 2004-10-02 2004-10-02 Machine à tricoter avec un système magnétique de sélection d'aiguilles pour produire des tissus tricotés à motifs

Publications (2)

Publication Number Publication Date
EP1643026A1 EP1643026A1 (fr) 2006-04-05
EP1643026B1 true EP1643026B1 (fr) 2008-08-06

Family

ID=34926821

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040023520 Expired - Lifetime EP1643026B1 (fr) 2004-10-02 2004-10-02 Machine à tricoter avec un système magnétique de sélection d'aiguilles pour produire des tissus tricotés à motifs

Country Status (3)

Country Link
EP (1) EP1643026B1 (fr)
CN (1) CN100519867C (fr)
DE (1) DE502004007789D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100460580C (zh) * 2006-06-29 2009-02-11 冯加林 一种用于控制横编织机梭箱的电磁铁
CN101435135B (zh) * 2007-11-14 2011-04-06 洪荣豪 圆编毛巾针织机的选针装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2252431A1 (en) * 1973-11-23 1975-06-20 Stibbe Monk Development Ltd Knitting machine needle selector device includes flexible rods - selectively attracted from permanent magnet by electromagnet
DE4024742C2 (de) * 1990-08-03 1996-07-25 Schieber Universal Maschf Strickmaschine
DE4028132C2 (de) * 1990-09-05 1994-06-30 Harting Elektronik Gmbh Auswahlmagnet
TW521105B (en) * 2000-03-31 2003-02-21 Shima Seiki Mfg Knitting member selecting actuator of knitting machine

Also Published As

Publication number Publication date
EP1643026A1 (fr) 2006-04-05
DE502004007789D1 (de) 2008-09-18
CN100519867C (zh) 2009-07-29
CN1754999A (zh) 2006-04-05

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