EP1223237A1 - Steuervorrichtung zum Betreiben von Raschelmaschinen mit mehreren Legebarren - Google Patents

Steuervorrichtung zum Betreiben von Raschelmaschinen mit mehreren Legebarren Download PDF

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Publication number
EP1223237A1
EP1223237A1 EP02000159A EP02000159A EP1223237A1 EP 1223237 A1 EP1223237 A1 EP 1223237A1 EP 02000159 A EP02000159 A EP 02000159A EP 02000159 A EP02000159 A EP 02000159A EP 1223237 A1 EP1223237 A1 EP 1223237A1
Authority
EP
European Patent Office
Prior art keywords
control unit
unit according
motors
transducer
central controller
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Withdrawn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
EP02000159A
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English (en)
French (fr)
Inventor
Corrado Pedroni
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 EP1223237A1 publication Critical patent/EP1223237A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • D04B27/26—Shogging devices therefor

Definitions

  • the present invention relates to a control unit for actuating multibar Raschel machines.
  • Raschel looms have bars that must be moved in order to produce various designs, for example on lace being formed.
  • the bars are currently actuated by using a chain composed of a certain number of links, which is variable according to the ratio of the design to be obtained.
  • the links can be as many as 10,000-20,000 and the chain can be 10-15 meters long.
  • Raschel looms have already been marketed in which the bars are not actuated by means of the chain but by means of electronic devices, which allow to vary the design more easily.
  • the aim of the invention is to solve the above described problem by providing a control unit for actuating multibar Raschel looms that is specifically studied to replace the chains currently in use with a solution that allows to modify the design being produced in a very short time and with considerable simplification of operation.
  • an object of the invention is to provide a control unit in which it is possible to manage design variation automatically and electronically despite having a conventionally designed loom.
  • Another object of the present invention is to provide a control unit that thanks to its particular constructive characteristics is capable of giving the greatest assurances of reliability and safety in use.
  • Another object of the present invention is to provide a control unit for actuating multibar Raschel looms that can be easily obtained starting from commonly commercially available elements and materials and is furthermore competitive from a merely economical standpoint.
  • a control unit for actuating multibar Raschel looms comprising a central controller in which data related to a design to be provided are entered, said controller driving a plurality of motor control cards, each one of said motors being connected to a respective actuation bar of a Raschel loom by interposing translational motion means for converting the motion that arrives from the corresponding motor into a translational motion of the respective bar.
  • control unit for actuating multibar Raschel looms comprises a central controller 1 in which it is possible to enter the data related to the design to be provided.
  • the central controller is usually connected to a personal computer for loading the data.
  • the central controller 1 controls a plurality of control cards 34, which drive motors 2 whose number corresponds to the number of bars to be actuated; in the drawings, the reference numeral 3 designates the optional actuation rod connected to the bar.
  • the motors 2 are advantageously step motors or brushless motors.
  • carriages 10 one for each bar 3, which have multiple rollers with bearings 11, which move in longitudinal guides 12, so as to provide a translational motion of the bar which corresponds to the actuation of the motor 2.
  • connection is performed by way of toothed belts 20, each of which is connected to a driving pulley 21 at the output of the motor 2 and winds around a driven pulley 22, which is keyed on a screw 23 that can engage a nut 24 rigidly coupled to the corresponding carriage 10;
  • the screw-and-nut assembly is advantageously of the ballscrew type.
  • the screw-and-nut assemblies are staggered; in practice, therefore, there are upper screws and nuts and lower screws and nuts, which are arranged alternately so that each screw and nut can have dimensions that can be equal at the most to twice the spacing between one bar and the other.
  • the motors too, have dimensions that are larger than the allowed spaces, so that as shown in Figure 4, the actuation motors for each lower and upper screw and nut assembly are mutually staggered along two rows, so that each motor has available a space that is equal to the space occupied by four bars.
  • a rod 30 for connection to a slider 31 is connected to each carriage 10, in addition to the corresponding actuation bar 3; the slider engages a transducer of the magnetostrictive type 32, which is meant to read and detect the absolute position of each slider and accordingly of each carriage.
  • the control card 34 reports to the central controller when positioning has occurred and therefore when the motor is motionless.
  • the transducers 32 report to the central controller the position of the sliders and therefore of the carriages, ensuring the exactness of the movements.
  • the magnetostrictive transducer 32 can also be optionally replaced with rotary absolute encoders, which are instruments that read an angular absolute position that is converted into a linear absolute position.
  • each cable connects a carriage to an encoder and then to a bar, the linear movement of the cable is rendered compatible with the rotary motion of the encoder by means of a spiral pulley applied to the shaft of said encoder.
  • an absolute optical scale or optionally a rotary or linear potentiometer or a laser rangefinder.
  • magnetostrictive transducer By using a magnetostrictive transducer the optimum solution is obtained, since magnetostrictive transducers are impermeable to dust and humidity and are also highly resistant to vibrations and wear.
  • a unit for transmitting the cycle signal designated by the reference numeral 50, is furthermore connected to the central controller and is driven by a proximity switch, which is operatively connected to the main shaft of the loom.
  • Part of the software of the central controller 51 acquires the data transmitted by the magnetostrictive transducers 32, compares them with the relative positions contained in the memory 52, and corrects any differences thereof.
  • Another considerable advantage consists in that, by not having to perform the conventional chain replacement, the problems related to the manufacturing costs of the chains, to the costs for the storage of the chains, and to the costs linked to the replacement steps are eliminated.
  • the solution according to the invention is therefore able to manage a Raschel loom with a gauge that can be determined by means of programming, which is accordingly rapidly modifiable.
  • the unit according to the invention by eliminating the chains, which can be up to 15 m long, allows a significant reduction in height while maintaining the widths set by the typical spacing of the bars.
  • the materials employed, as well as the contingent shapes and dimensions may be any according to requirements.
EP02000159A 2001-01-16 2002-01-08 Steuervorrichtung zum Betreiben von Raschelmaschinen mit mehreren Legebarren Withdrawn EP1223237A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI010069 2001-01-16
ITMI20010069 ITMI20010069A1 (it) 2001-01-16 2001-01-16 Gruppo di comando per l'azionamento di telai raschel multibarre

Publications (1)

Publication Number Publication Date
EP1223237A1 true EP1223237A1 (de) 2002-07-17

Family

ID=11446488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02000159A Withdrawn EP1223237A1 (de) 2001-01-16 2002-01-08 Steuervorrichtung zum Betreiben von Raschelmaschinen mit mehreren Legebarren

Country Status (2)

Country Link
EP (1) EP1223237A1 (de)
IT (1) ITMI20010069A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102719994A (zh) * 2012-05-16 2012-10-10 常州市武进五洋纺织机械有限公司 一种经编机的电子横移装置
CN115449967A (zh) * 2022-08-25 2022-12-09 福建省鑫港纺织机械有限公司 一种具有方便连接固定的槽针连杆的高速经编机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989003443A1 (en) * 1987-10-08 1989-04-20 Liba Maschinenfabrik Gmbh Warp knitting machine with guide bars adjustable by means of racking motors
EP0533630A1 (de) * 1991-09-16 1993-03-24 Luigi Omodeo Zorini Antriebsvorrichtung zur Übertragung von horizontalen hin- und hergehenden Bewegungen an Hülsentragbarren an Strickmaschinen
EP0600263A2 (de) * 1992-11-16 1994-06-08 KÄNDLER MASCHINENBAU GmbH Elektronische Steuereinheit für Maschinen mit durch hochdynamisch arbeitende Stellglieder synchronisiert gesteuerten Bewegungsabläufen
EP0684331A1 (de) * 1994-05-24 1995-11-29 COMEZ S.p.A. Verfahren zum Steuern vom horizontalen Versatz der Fadenlegeschienen in Beziehung mit vorher bestimmten Distanzen zwischen den Nadelmitten an Strickmaschinen
DE29516290U1 (de) * 1995-10-13 1997-02-06 Liba Maschf Multibar-Kettenwirkmaschine mit Servomotorantrieb für die Legebarren
EP1013812A1 (de) * 1998-12-23 2000-06-28 Luigi Omodeo Zorini Betätigungsvorrichtung für die gesteuerte Bewegung von Teilen in Strickmaschinen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989003443A1 (en) * 1987-10-08 1989-04-20 Liba Maschinenfabrik Gmbh Warp knitting machine with guide bars adjustable by means of racking motors
EP0533630A1 (de) * 1991-09-16 1993-03-24 Luigi Omodeo Zorini Antriebsvorrichtung zur Übertragung von horizontalen hin- und hergehenden Bewegungen an Hülsentragbarren an Strickmaschinen
EP0600263A2 (de) * 1992-11-16 1994-06-08 KÄNDLER MASCHINENBAU GmbH Elektronische Steuereinheit für Maschinen mit durch hochdynamisch arbeitende Stellglieder synchronisiert gesteuerten Bewegungsabläufen
EP0684331A1 (de) * 1994-05-24 1995-11-29 COMEZ S.p.A. Verfahren zum Steuern vom horizontalen Versatz der Fadenlegeschienen in Beziehung mit vorher bestimmten Distanzen zwischen den Nadelmitten an Strickmaschinen
DE29516290U1 (de) * 1995-10-13 1997-02-06 Liba Maschf Multibar-Kettenwirkmaschine mit Servomotorantrieb für die Legebarren
EP1013812A1 (de) * 1998-12-23 2000-06-28 Luigi Omodeo Zorini Betätigungsvorrichtung für die gesteuerte Bewegung von Teilen in Strickmaschinen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102719994A (zh) * 2012-05-16 2012-10-10 常州市武进五洋纺织机械有限公司 一种经编机的电子横移装置
CN115449967A (zh) * 2022-08-25 2022-12-09 福建省鑫港纺织机械有限公司 一种具有方便连接固定的槽针连杆的高速经编机
CN115449967B (zh) * 2022-08-25 2023-11-21 福建省鑫港纺织机械有限公司 一种具有方便连接固定的槽针连杆的高速经编机

Also Published As

Publication number Publication date
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