EP0229122B1 - Kettenwirkmaschine - Google Patents

Kettenwirkmaschine Download PDF

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Publication number
EP0229122B1
EP0229122B1 EP86904088A EP86904088A EP0229122B1 EP 0229122 B1 EP0229122 B1 EP 0229122B1 EP 86904088 A EP86904088 A EP 86904088A EP 86904088 A EP86904088 A EP 86904088A EP 0229122 B1 EP0229122 B1 EP 0229122B1
Authority
EP
European Patent Office
Prior art keywords
warp
warp beam
clutch
coupling
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
EP86904088A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0229122A1 (de
Inventor
Karl Denzler
Alfred Böhm
Adolf HÄGEL
Rudi Wirth
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.)
LIBA Maschinenfabrik GmbH
Original Assignee
LIBA Maschinenfabrik 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.)
Filing date
Publication date
Application filed by LIBA Maschinenfabrik GmbH filed Critical LIBA Maschinenfabrik GmbH
Publication of EP0229122A1 publication Critical patent/EP0229122A1/de
Application granted granted Critical
Publication of EP0229122B1 publication Critical patent/EP0229122B1/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
    • 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
    • D04B27/16—Warp beams; Bearings therefor
    • D04B27/20—Warp beam driving devices
    • D04B27/22—Warp beam driving devices electrically controlled

Definitions

  • the invention relates to a warp knitting machine in which the knitting tools and each warp beam are each driven by their own electric motor fed from a common network.
  • BE-A 665 453 It is also known from BE-A 665 453 to provide an electrically operable clutch for the drive of the warp beam in a device for regulating the warp thread tension on looms, which is controlled via a control loop so that a constant warp thread tension is constantly maintained.
  • the clutch is arranged in the drive train for the warp beam in front of a worm that drives the warp beam, which engages in a worm wheel seated on the warp beam axis.
  • the worm and worm wheel form a self-locking point according to the usual effect of these components.
  • the object of the invention is to eliminate the risk of the warp threads tearing off in the event of a power failure, without exposing the machine to a particular load.
  • an electrically operable clutch connected to the mains which can be engaged by the mains voltage and disengages when it ceases to exist, is arranged such that when the clutch is disengaged one of the knitting tools Tension exerted by the warp threads keeps the warp beams rotating.
  • the clutch disengaging in the event of a power failure and the resulting disconnection of the drive connection between the electric motor and the warp beam eliminates the risk of the warp threads breaking, since the warp beam (s) can continue to rotate without further ado due to the tensile stress exerted on them by the knitting tools until the Knitting tools with the main shaft stopped are also stopped.
  • the main shaft can run out under the effect of its moments of inertia, so that the main shaft and the components connected to it are not exposed to any particular loads.
  • Another significant advantage of interrupting the drive connection between the electric motor and the warp beam is that the knitting tools that continue to work in the event of a power failure due to their pull on the warp threads and the following of the warp beams automatically bring about the necessary synchronization between the main shaft and the warp beam or warp beams, without the need for special means.
  • This synchronization is made more difficult in the event of the main shaft almost suddenly being stopped according to the prior art discussed above, since it can be assumed that the drives of the warp beams cease their activity immediately. For this reason, reference is also made in DE-PS 30 25 782 to a preferred embodiment, according to which the number of follower revolutions of the main shaft is only 1 to 2.
  • a reduction gear is built into the drive connection between the warp beam and the electric motor in question, which adapts the different speeds of the electric motor and warp beam to one another. If an electric motor is used as the drive, which has a relatively high speed, then the reduction gear can lead to self-locking in the gear, i.e. the gear is not able to transmit torque in the reverse drive direction. Its self-locking prevents any reverse drive. In such a case, the coupling is arranged in the power transmission area between the warp beam and the self-locking point.
  • a brake set in the power transmission area between the coupling and the warp beam can be arranged in such a way that the warp beam runs out while maintaining an admissible thread tension when the mains voltage is lost. Since the brake is only geared towards maintaining a minimum thread tension, the braking effects are very low, so that the brake causes practically no additional energy consumption.
  • the clutch can be advantageously used as a brake by giving it such a spring tension acting in the direction of engagement that the clutch acts as a brake when the mains voltage is lost.
  • the brake does not appear at all, since in this case the clutch causes the power transmission without slippage. If the network fails, only the spring tension acting in the direction of engagement remains in the clutch, which, however, is not able to keep the clutch in the engagement function. It presses the relevant coupling parts together only with a certain force, so that mutual rotation of the coupling parts is possible, but the coupling itself exerts a braking effect.
  • the warp knitting machine shown in Fig. 1 consists of the machine frame 1, which is penetrated by the main shaft 2 for driving the knitting tools, not shown.
  • the warp beam 3 is mounted with its axis 4 on the machine frame 1.
  • the warp knitting machine can be equipped with several warp beams in a known manner.
  • the warp threads 5 are drawn off from the warp beam 3 and fed to the knitting tools via the thread tensioning rocker 6
  • the main shaft 2 is over the two belts discs 7 and 8 and the toothed belt 9 wrapped around them.
  • the pulley 8 is set in rotation by the electric motor 10, which thus forms the drive responsible for the rotation of the main shaft.
  • the warp beam 3 is driven via the two pulleys 12, 11, which are wrapped around by the toothed belt 13.
  • the pulley 12 is seated on the shaft 14, which projects into a clutch, which is shown here in simplified form by the two clutch disks 15 and 16 opposite one another.
  • the clutch is in the engaged state.
  • the two clutch discs 15 and 16 are shown apart from each other to show in this way that the clutch can assume a disengaged position in which the clutch then interrupts the drive.
  • the clutch disc 16 is seated on the shaft 17 which carries the worm wheel 18.
  • the worm wheel 18 engages in the worm 19, which sits on the axis of the electric motor 20, which thus forms the drive motor for the warp beam 3.
  • the speeds of the two electric motors 10 and 20 are matched to one another in a known manner by a control system in such a way that the speed of the warp beam 3 is adapted to the need for warp thread quantity determined by the work of the knitting tools.
  • Both electric motors 10 and 20 are connected to the same network, so that they stop in the event of a power failure. Because of the masses connected to the main shaft 2, it then continues to run for a certain time, the knitting tools driven by it still pulling warp threads 5 from the warp beam 3.
  • the motor 20 stops more quickly than the motor 10, in particular because it does not involve any larger, rapidly rotating flywheels. So that the faster styling of the motor 20 compared to the shutdown of the motor 10 does not lead to a break of the warp threads 5, the clutch consisting of the clutch disks 15 and 16 is provided, which is also connected to the mains as an electrically actuatable clutch, the clutch is designed so that it is indented by the mains voltage, that is, it disengages in the event of a mains failure. If the mains voltage were present, the two clutch disks 15 and 16 would be pressed against one another in such a way that they effect the torque transmission from the shaft 17 to the shaft 14.
  • the clutch disengages so that the shaft 14, the pulleys 12 and 11 and the warp beam 3 can rotate freely.
  • the tension exerted on the warp threads 5 by the initially continuing knitting tools causes the warp beam 3 to rotate further, which acts as a backward drive to a certain extent and, via the pulleys 11 and 12 and the toothed belt 13, slowly takes the clutch disc 15 out, which opposes each other the stationary clutch disc 16 rotates.
  • an electrically actuated clutch is shown, which can take the place of the clutch formed by the clutch discs 15 and 16 in Fig. 1.
  • the worm wheel 18 sits on the shaft 21 (which corresponds to the shaft 17 according to FIG. 1).
  • the worm wheel 18 is rotatably connected to the shaft 21 by means of the wedge 22.
  • the worm wheel 18 engages in the worm 19 which, as shown in FIG. 1, is driven by the motor 20 shown there.
  • the clutch disc 16 faces the axially displaceable clutch disc 15, which is provided with the friction lining 24.
  • the friction lining 24 causes the two clutch disks 15 and 16 to take each other along.
  • the clutch disk 15 is supported relative to the shaft 21 on the needles 25, which give the clutch disk 15 mobility in relation to the shaft 21. so that the clutch disc 15 can be moved axially relative to the shaft 21 and rotated relative to the shaft 21.
  • the pulley 12 is firmly connected to the clutch disc 15, so that when the clutch disc 15 rotates, the pulley 12 is taken along, which then takes the toothed belt 13 in the manner shown in FIG.
  • the Electromagnet 26 In the area of the clutch disc 16 is the Electromagnet 26 arranged with the magnet coil 27, the electromagnet 26 being held in position by the support plate 28. There is an air gap 29 between the electromagnet 26 and the clutch disc 16, which ensures that the clutch disc 16 can rotate freely with respect to the electromagnet 26.
  • This is a known construction of an electrically actuated clutch.
  • the magnetic coil 27 When the magnetic coil 27 is energized (connection to the mains), the magnetic field generated by it causes the clutch disc 15 to be attracted to the clutch disc 16, whereby the clutch is engaged.
  • This is also a known process for electrically actuated clutches. In the event of a power failure, however, the clutch disc 15 is released (the effect of the compression spring 30 shown in FIG.
  • Fig. 2 the compression spring 30 is still drawn, which is supported on one side against the ring 31 fixed on the shaft 21 and presses with its other side against the clutch disc 15.
  • the compression spring 30 is set so that it presses the clutch disc 15 against the clutch disc 16 only with gentle pressure.
  • This weak pressure of the compression spring 30 has the result that when the clutch disc 16 is at a standstill and the clutch disc 15 continues to rotate, a weak friction occurs between the friction lining 24 on the clutch disc 16, which acts in this case as a brake.
  • the friction of the clutch disc 15 is braked by this friction, so that a driven warp beam 3 that initially continues to run in the event of a power failure is braked accordingly and runs out.
  • the bias of the compression spring 30 is set so that the warp threads 5 are not exposed to excessive tension due to the braking caused by them.
  • the ring 31 can be axially adjustable via the thread 32 to adjust the pretension of the compression spring 30.
  • a more or less strong prestressing of the compression spring 30 is obtained, and thus a more or less strong braking of an outgoing warp beam 3.
  • the function of the clutch is therefore the same as the function of the brake Components combined with each other. The brake thus prevents the continuing warp beam 3 from overtaking the continuing main shaft 2 to a certain extent in the event of a power failure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Looms (AREA)
EP86904088A 1985-07-03 1986-07-03 Kettenwirkmaschine Expired - Lifetime EP0229122B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3523794A DE3523794C1 (de) 1985-07-03 1985-07-03 Kettenwirkmaschine
DE3523794 1985-07-03

Publications (2)

Publication Number Publication Date
EP0229122A1 EP0229122A1 (de) 1987-07-22
EP0229122B1 true EP0229122B1 (de) 1991-11-21

Family

ID=6274864

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86904088A Expired - Lifetime EP0229122B1 (de) 1985-07-03 1986-07-03 Kettenwirkmaschine

Country Status (5)

Country Link
US (1) US4736602A (enrdf_load_stackoverflow)
EP (1) EP0229122B1 (enrdf_load_stackoverflow)
JP (1) JPS63500045A (enrdf_load_stackoverflow)
DE (1) DE3523794C1 (enrdf_load_stackoverflow)
WO (1) WO1987000216A1 (enrdf_load_stackoverflow)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02300399A (ja) * 1989-05-15 1990-12-12 Nippon Kamiparupu Shoji Kk 遠赤外線放射用紙
DE19615671C2 (de) * 1996-04-19 2001-10-18 Liba Maschf Vorrichtung zur Herstellung von Kettenwirkware mit zwei voneinander unabhängigen Wirkbereichen
DE202005020087U1 (de) * 2005-12-07 2007-04-19 BROSE SCHLIEßSYSTEME GMBH & CO. KG Antriebsanordnung zur motorischen Verstellung einer Kraftfahrzeugtür o.dgl.
CN100396834C (zh) * 2006-04-13 2008-06-25 康盘方 经编机电子送经系统
EP1867769B1 (de) * 2006-06-13 2009-01-07 KARL MAYER TEXTILMASCHINENFABRIK GmbH Musterbaumanordnung
US8133142B2 (en) * 2007-05-08 2012-03-13 Dunkermotoren Gmbh Belt pulley for the output shaft of a gear, gear, electric motor, and output shaft
CN102733073A (zh) * 2012-05-31 2012-10-17 常州市武进五洋纺织机械有限公司 一种经编机编码器装置
CN102733072A (zh) * 2012-05-31 2012-10-17 常州市武进五洋纺织机械有限公司 一种具有主轴编码器装置的经编机
CN103243464A (zh) * 2013-04-26 2013-08-14 吴江江旭纺织有限公司 一种织机刹车结构
US10392734B2 (en) * 2016-07-03 2019-08-27 Tzu-Chin Hsu Yarn tension control device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2625021A (en) * 1949-02-01 1953-01-13 Alfred Hofmann & Co Automatic yarn tension control
DE3025782A1 (de) * 1980-07-08 1982-02-04 Karl Mayer Textil-Maschinen-Fabrik Gmbh, 6053 Obertshausen Kettenwirkmaschine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB907342A (en) * 1960-05-09 1962-10-03 Tullmaschb Karl Marx Stadt Veb Improvements in or relating to warp feed devices in multineedle sewing or warp knitting machines
FR1407185A (fr) * 1964-06-17 1965-07-30 Inst Textile De France Dispositif de commande par mouvement rotatif à vitesse constante d'un dérouleur de fils de chaîne pour métier à tisser
FR1530964A (fr) * 1966-07-12 1968-06-28 Courtaulds Ltd Perfectionnements à l'ourdissage
US3762346A (en) * 1972-02-28 1973-10-02 B & J Machinery Co Yarn tension control for a tufting machine
GB1593033A (en) * 1978-05-25 1981-07-15 Scapa Eng Control of warp and cloth tensions in weaving looms
DE2939312C2 (de) * 1979-09-28 1984-01-05 Liba Maschinenfabrik Gmbh, 8674 Naila Fadenzuführung für Kettenwirkmaschinen
DE3520244A1 (de) * 1984-08-24 1986-03-06 Aktiengesellschaft Adolph Saurer, Arbon Warenabzugseinrichtung an einer webmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2625021A (en) * 1949-02-01 1953-01-13 Alfred Hofmann & Co Automatic yarn tension control
DE3025782A1 (de) * 1980-07-08 1982-02-04 Karl Mayer Textil-Maschinen-Fabrik Gmbh, 6053 Obertshausen Kettenwirkmaschine

Also Published As

Publication number Publication date
JPH0137500B2 (enrdf_load_stackoverflow) 1989-08-08
WO1987000216A1 (en) 1987-01-15
DE3523794C1 (de) 1986-09-04
JPS63500045A (ja) 1988-01-07
US4736602A (en) 1988-04-12
EP0229122A1 (de) 1987-07-22

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