EP0240799B1 - Verfahren und Vorrichtung zum Beeinflussen der Länge und des Maschenbildes von Strickstücken - Google Patents

Verfahren und Vorrichtung zum Beeinflussen der Länge und des Maschenbildes von Strickstücken Download PDF

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Publication number
EP0240799B1
EP0240799B1 EP87104021A EP87104021A EP0240799B1 EP 0240799 B1 EP0240799 B1 EP 0240799B1 EP 87104021 A EP87104021 A EP 87104021A EP 87104021 A EP87104021 A EP 87104021A EP 0240799 B1 EP0240799 B1 EP 0240799B1
Authority
EP
European Patent Office
Prior art keywords
yarn
thread
tension
process controller
brake
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
EP87104021A
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German (de)
English (en)
French (fr)
Other versions
EP0240799A1 (de
Inventor
Gottfried Dipl.-Ing.(FH) Kühnert
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.)
Henkel Dorus GmbH and Co KG
Original Assignee
Dr Rudolf Schieber 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 Dr Rudolf Schieber GmbH and Co KG filed Critical Dr Rudolf Schieber GmbH and Co KG
Publication of EP0240799A1 publication Critical patent/EP0240799A1/de
Application granted granted Critical
Publication of EP0240799B1 publication Critical patent/EP0240799B1/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
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/44—Tensioning devices for individual threads

Definitions

  • the invention relates to a device for influencing the length and the stitch pattern of knitted pieces produced on a knitting machine, the knitting machine having a yarn spool, a thread brake and / or a thread return spring, a thread tension meter and a thread guide in the specified sequence with respect to the thread running direction, a process controller is provided, which specifies a target value for the thread tension, and wherein the braking force of the thread brake and / or the thread return spring is changed as a function of an output signal of the thread tension meter.
  • Knit pieces produced on flat knitting machines are subject to a length tolerance which needs to be improved due to different knitting requirements or parameters such as yarn tension, fabric take-off and knitting speed.
  • the length of the knitted piece can be influenced via control elements.
  • the knitted length of the knitted piece is measured, for example, and the deduction values for the knitted piece to be produced next are corrected by adjusting the needle counterbores.
  • This is an indirect measurement, in which the parameters for the next piece of knitting can already be stored in a completely different way, for example from the end of the thread, and thus the deduction values corrected for this next piece of knitting can no longer lead to a correct length of the piece of knitting.
  • the thread is fed to the needles via thread guides.
  • the needles which have to fetch the thread from a spool of thread when pulling, pull it from the spool over several deflections. Since, on the one hand, work is almost always carried out with several threads and, on the other hand, new spools of thread have to be added constantly for thread feeding, different thread tension ratios arise continuously.
  • the needles are constantly drawn off by a needle counterbore, the needles that are currently forming a stitch not only get the thread from the thread spool, but also from the stitch previously formed, the needle of which is no longer held by the needle counterbore.
  • the thread that comes from the spool passes through various control points, such as. B. a knot guard and a guard for the running of the coil. It is therefore influenced to different degrees in its tension by a thread brake and a thread return spring.
  • the thread brake and the thread return spring can only be adjusted by hand. Therefore, if the thread tension changes within a knitted piece, for example due to yarn spools wound with different hardness, this can only be done by manual adjustment to be influenced.
  • the stitches become irregular, the quality of the stitch pattern is poor and the length of the knitted fabric also varies.
  • a thread compensation device on a flat knitting machine in which a vertically movable thread guide eyelet and an electromagnetically switchable and switchable thread brake is provided in front of the thread loop to form a thread loop.
  • the thread brake is switched on and prevents further thread withdrawal from a thread spool. If a sensor detects an upper end position of the thread guide eyelet and thus a length-reduced thread loop, the thread brake is switched off or switched to a pre-adjustable braking dimension. The thread tension is not measured.
  • a thread tension detector emits two discrete signals, depending on whether a position of a cover pointer corresponding to the thread tension clears or interrupts a light path.
  • a maximum or minimum thread tension occurs, one of two magnets is excited.
  • a thread brake depending on the excitation of one or the other magnet, a base plate with rollers arranged one above the other, over which the thread is guided, is rotated back and forth so that the braking force is switched discontinuously between two values in the manner of a two-point control.
  • the present invention is therefore based on the object of creating a device with which it is possible in a simple and safe manner to determine the length and the stitch formation of a knitted fabric produced on a flat knitting machine to keep it even more constant during knitting and to choose the length and stitching in a simple way.
  • the process controller specifies a desired value for the thread tension depending on the knitted fabric, the type of thread, the thread guide and / or the thread movement, and with the thread tension meter for detecting the actual thread tension value and with the thread brake and / or the thread return spring for setting the selected thread tension Setpoint until a flat knitting machine is connected.
  • the process controller preferably contains a microprocessor.
  • the process controller is advantageously integrated in a machine control of an electronically controlled flat knitting machine.
  • a particularly advantageous embodiment of the invention consists in that a yarn spool, a thread brake and / or a thread return spring, a thread tension meter and a thread guide are provided for each of a plurality of threads to be knitted, and that the process controller is designed for and correspondingly with a plurality of nominal values for the thread tension each thread tension meter and each thread brake and / or each thread return spring is connected.
  • the setpoint or the setpoints of the thread tensions are advantageously programmed into the process computer.
  • FIG. 1 is a schematic representation of an embodiment of the device according to the invention in side view
  • Fig. 2 is a schematic representation of the thread brake in the device of FIG. 1, seen in the direction of arrow II in Fig. 1
  • 3 shows a schematic illustration of the device in FIG. 1, viewed in the direction of arrow III in FIG. 1.
  • the device shown in the drawing has a yarn spool 1, from which a thread 2 to be knitted is drawn off.
  • the thread coming from the yarn package 1 passes through a thread brake 3, a knot monitor 4 and a return spring 5.
  • the thread 2 is fed to the thread guide 7 of a thread guide moving along the flat knitting machine via a diverter plate 6.
  • a thread tension meter 8 which is operatively connected to the thread 2, is arranged in the area of the thread exit from the diverter plate 6.
  • the output variable of the thread tension meter 8 corresponding to the thread tension actual value is fed to a process controller 9.
  • the process controller 9, which advantageously contains a microprocessor and can be integrated in the machine control of an electronically controlled flat knitting machine, carries out a comparison of the actual thread tension value with a thread tension setpoint programmed into it.
  • Both the thread brake 3 and the thread return spring 5 can be controlled automatically by the process controller 9. They expediently have a stepper motor 10 and 11, respectively which the bias of a spring 12 or 13 is adjusted.
  • the thread tension meter 8 If the thread tension changes during the course of the manufacture of a knitted piece, also during the passage of a row of knits, then this is detected by the thread tension meter 8, compared in process controller 9 with a thread tension setpoint preprogrammed there depending on the knitted fabric and yarn, and the result of the target / actual value comparison passed on to the thread brake 3 and / or the thread return spring 5 or their stepper motors 10, 11.
  • the thread tension is thus continuously regulated to the predetermined thread tension setpoint, specifically by changing the brake or return spring forces of the thread brake 3 or the thread return spring 5.
  • One of the devices described is provided for each thread guide with thread guide nuts 7 of a flat knitting machine. All of these devices work on a single process controller 9. Different thread tension setpoints for the different threads can be programmed into the process controller 9. The nominal values of the thread tensions can also be influenced in the process controller 9 by one or more actual thread tension values.
  • the invention leads in a highly simple and reliable way to an equalization of the length and the stitch pattern of knitted pieces produced on a flat knitting machine by simply detecting the thread tension in front of the knitting needle and regulating this thread tension to a predetermined value to compensate for the yarn type, thread guidance and thread movement induced thread tension changes.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP87104021A 1986-03-21 1987-03-19 Verfahren und Vorrichtung zum Beeinflussen der Länge und des Maschenbildes von Strickstücken Expired - Lifetime EP0240799B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863609719 DE3609719A1 (de) 1986-03-21 1986-03-21 Verfahren und vorrichtung zum beeinflussen der laenge und des maschenbildes von strickstuecken
DE3609719 1986-03-21

Publications (2)

Publication Number Publication Date
EP0240799A1 EP0240799A1 (de) 1987-10-14
EP0240799B1 true EP0240799B1 (de) 1991-05-02

Family

ID=6297029

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104021A Expired - Lifetime EP0240799B1 (de) 1986-03-21 1987-03-19 Verfahren und Vorrichtung zum Beeinflussen der Länge und des Maschenbildes von Strickstücken

Country Status (4)

Country Link
US (1) US4821199A (enrdf_load_stackoverflow)
EP (1) EP0240799B1 (enrdf_load_stackoverflow)
DE (2) DE3609719A1 (enrdf_load_stackoverflow)
SU (1) SU1674697A3 (enrdf_load_stackoverflow)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3724707A1 (de) * 1987-07-25 1989-02-02 Stoll & Co H Fadenspann- und -fuehrungseinrichtung fuer flachstrickmaschinen
FR2625755B1 (fr) * 1988-01-11 1990-08-17 Inst Textile De France Cantre perfectionne pour metier a tricoter
DE3813216A1 (de) * 1988-04-20 1990-02-08 Gustav Memminger Vorrichtung zum beeinflussen der fadenspannung bei einer fadenverarbeitenden textilmaschine, insbesondere strickmaschine
DE3824034C1 (enrdf_load_stackoverflow) * 1988-07-15 1989-09-14 Gustav 7290 Freudenstadt De Memminger
IT1228042B (it) * 1988-12-16 1991-05-27 Santoni & C S P A B Dispositivo tensionatore ad azione regolabile per fili alimentati a macchine tessili, in particolare macchine per maglieria
EP0381908A1 (en) * 1989-02-07 1990-08-16 José Abril Cullell Mechanism of self-control and automatic regulation of pressure and yarn consumption in rectilineal knitting machines
DE4014759A1 (de) * 1990-05-08 1991-11-14 Adalbert Guggemos Vorrichtung zum fortlaufenden spannen irgendwelcher faeden oder dergleichen
DE4032402A1 (de) 1990-10-12 1992-04-16 Menninger Iro Gmbh Verfahren und einrichtung zur fadensteuerung bei maschenbildenden textilmaschinen
DE4032778A1 (de) * 1990-10-16 1992-04-23 Klaus Schoenherr Verfahren und vorrichtung zur erzielung einer konstanten spannung des fadens einer strick- oder wirkmaschine
DE9110404U1 (de) * 1991-08-22 1991-11-28 Hacoba Textilmaschinen GmbH & Co KG, 42281 Wuppertal Tellerbremse für Textilfäden
DE19538312B4 (de) * 1995-10-14 2004-09-02 H. Stoll Gmbh & Co. Fadenkontrollvorrichtung für Flachstrickmaschinen
DE19801643A1 (de) * 1998-01-17 1999-07-22 Stoll & Co H Verfahren zur Herstellung eines Gestricks auf einer Flachstrickmaschine
DE10005101A1 (de) * 1999-11-09 2001-05-10 Hepp Gmbh Verfahren und Vorrichtung zur Herstellung einer Strick- oder Wirkware sowie Fadenliefergerät für eine Strick- oder Wirkmaschine bzw. Garnproduktionsmaschine
IT1314900B1 (it) * 2000-06-27 2003-01-16 Sangiacomo Spa Metodo di misura e controllo continuativi della tensione e/oscorrimento dei fili alimentati in macchine per lavorazioni a maglia.
US6640591B1 (en) * 2002-11-12 2003-11-04 Eugene Haban Apparatus and method for production of fabrics
JP4366312B2 (ja) * 2004-12-27 2009-11-18 株式会社島精機製作所 度目調整機能付きの横編機と、編成方法、及び編成プログラム
US7509821B1 (en) * 2008-05-19 2009-03-31 Pai Lung Machinery Mill Co., Ltd. Yarn measuring device for flat bed knitting machines
DE102011053824B3 (de) * 2011-09-21 2012-10-04 Memminger-Iro Gmbh Fadenliefergerät zur Zufuhr eines Fadens zu einer Textilmaschine
CN102704170B (zh) * 2012-06-05 2014-04-23 常熟市国光机械有限公司 导纱系统的闭纱机构
CN103668752B (zh) * 2013-12-22 2016-01-06 飞虎科技有限公司 一种具有纱线张力检测机构的电脑横机给纱装置
US9394639B2 (en) 2014-10-16 2016-07-19 Handi Quilter, Inc. Motorized thread tensioner for a sewing machine
US8997669B1 (en) * 2014-10-16 2015-04-07 Handi Quilter, Inc. Thread tensioner for a sewing machine

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3408832A (en) * 1965-05-19 1968-11-05 Nagataseiki Kabushikigaisha Yarn tensioning regulating apparatus for stocking machine
US3677036A (en) * 1969-11-25 1972-07-18 Charles Hatay Method of equalizing supply of thread to a plurality of knitting stations
US3858416A (en) * 1973-07-23 1975-01-07 Eugene F White Knitting machine yarn feeding apparatus
GB1584259A (en) * 1976-08-16 1981-02-11 Iro Ab Methods and apparatus for knitting machine control systems
IT1083113B (it) * 1977-05-18 1985-05-21 Marchisio Giovanni & C S A S Macchina circolare per maglieria con dispositivo di regolazione della velocita di alimentazione dei fili
DE3008735C2 (de) * 1980-03-07 1982-08-05 Maschinenfabrik Carl Zangs Ag, 4150 Krefeld Vorrichtung zur Verstellung der Fadenspannung für mehrnadelige Stickautomaten
US4523440A (en) * 1982-10-08 1985-06-18 Institut Textile De France Regulating device for the length of thread absorbed by a knitting machine
DE3300240A1 (de) * 1983-01-05 1984-07-12 Universal Maschinenfabrik Dr. Rudolf Schieber GmbH & Co KG, 7081 Westhausen Verfahren und einrichtung zum erfassen und korrigieren der laenge eines auf einer flachstrickmaschine entstehenden strickstuecks
DE3316078A1 (de) * 1983-05-03 1984-11-08 SIPRA Patententwicklungs- und Beteiligungsgesellschaft mbH, 7470 Albstadt Fadenzufuhreinrichtung fuer strick- und wirkmaschinen
DE3429207C2 (de) * 1984-08-08 1986-06-19 Gustav 7290 Freudenstadt Memminger Fadenliefervorrichtung für fadenverbrauchende Textilmaschinen
DE3431743C2 (de) * 1984-08-29 1986-11-27 Christian Montopoli Val d'Arno Bretscher Vorrichtung zur Fadenzuführung für eine Strickmaschine
US4662407A (en) * 1986-02-12 1987-05-05 Albany International Corp. Method and apparatus of controlling warp tension on a weaving loom

Also Published As

Publication number Publication date
US4821199A (en) 1989-04-11
DE3609719C2 (enrdf_load_stackoverflow) 1988-01-28
EP0240799A1 (de) 1987-10-14
SU1674697A3 (ru) 1991-08-30
DE3609719A1 (de) 1987-10-01
DE3769686D1 (de) 1991-06-06

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