EP0344100B1 - Dispositif électromagnétique pour métiers à tisser - Google Patents

Dispositif électromagnétique pour métiers à tisser Download PDF

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Publication number
EP0344100B1
EP0344100B1 EP89810294A EP89810294A EP0344100B1 EP 0344100 B1 EP0344100 B1 EP 0344100B1 EP 89810294 A EP89810294 A EP 89810294A EP 89810294 A EP89810294 A EP 89810294A EP 0344100 B1 EP0344100 B1 EP 0344100B1
Authority
EP
European Patent Office
Prior art keywords
strip
leaf spring
spring strip
thread
drum
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
EP89810294A
Other languages
German (de)
English (en)
Other versions
EP0344100A1 (fr
Inventor
Joannes Josephus Henricus Marie Gorris
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.)
Sulzer AG
Original Assignee
Gebrueder Sulzer AG
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 Gebrueder Sulzer AG filed Critical Gebrueder Sulzer AG
Publication of EP0344100A1 publication Critical patent/EP0344100A1/fr
Application granted granted Critical
Publication of EP0344100B1 publication Critical patent/EP0344100B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/362—Drum-type weft feeding devices with yarn retaining devices, e.g. stopping pins
    • D03D47/363—Construction or control of the yarn retaining devices

Definitions

  • the invention relates to an electromagnetic device for weaving machines comprising a coil that can be connected to an electrical line and at least one pole body assigned to it.
  • Known weaving machines irrespective of the type, have a large number of device elements which have to interact in a controlled manner, in particular when guiding the thread.
  • the weft thread storage device to which a thread brake can be connected when air is inserted.
  • relay nozzles and at the end of the shed a stretching nozzle are necessary.
  • DE-OS 23 64 680 a device for treating yarns which acts as a thread brake and works electromagnetically. However, there is only stopping or loosening of the thread here, but not slowing down, ie slowing the thread running.
  • European patent application 0 250 359 shows, for example, a clamping element by means of which thread windings are prevented from being pulled off the drum of the shove thread store.
  • This clamping element is also actuated by means of an electromagnet.
  • the inventor has set himself the goal of developing an electromagnetic device of the type mentioned above, which quickly changes position and can be used in a variety of ways, particularly on weaving machines. Furthermore, this device should be of simple construction and also be able to provide an intermediate position outside of two defined end positions.
  • a leaf spring strip fixedly mounted at one end is assigned to the pole body and that the pole body has a contact surface for the leaf spring strip, the leaf spring strip in the non-tightened state, in the absence of a magnetic field, being arranged obliquely to the contact surface in such a way that during assembly of the magnetic field in the coil and the pole body, the end region of the leaf spring strip first comes to rest on the contact surface of the pole body and, when the magnetic field is strengthened, ever larger areas of the leaf spring strip rest on the pole body.
  • both leaf spring strips and pole bodies consist of a material with magnetic properties.
  • the contact surface or the leaf spring strip will be curved.
  • a straight leaf spring strip is fixed at one end to a curved contact surface. If the coil is not activated, the angle between the leaf spring strip and the contact surface will increase due to the curvature of the contact surface along the length of the leaf spring strip. If the coil is activated, a relatively high electromagnetic force acts on the leaf spring strip if the leaf spring strip is of great length, with it initially being quickly attracted due to a lack of counterforce. However, the more the leaf spring strip attaches to the curved contact surface, the higher its bend and the more opposing forces it develops, which counteract the electromagnetic attraction. If the coil storm is switched off, the leaf spring strip is returned to its starting position with a very high initial acceleration.
  • the main advantage of the present invention is thus that both initial speeds with which the leaf spring strip moves from its two end positions are relatively high. When the voltage in the electrical lines of the coil changes, different end positions of the leaf spring strip on the pole body can be reached.
  • the leaf spring strip of the damping strip is covered with a thin sheet which acts as an additional mass and thus further improves the damping. In particular, rebound of the leaf spring strip is reduced.
  • Another advantage of the invention is that the mass of the leaf spring strip to be moved is relatively low. Furthermore, the spring characteristic and thus the movement of the leaf spring can be controlled. The relatively large contact surface of the leaf spring and the low mass contribute to a long service life. The entire setup is simple and inexpensive to manufacture.
  • the electromagnetic device is to be used above all at the end of the weft insertion in a weaving machine to prevent further thread windings from being pulled off the drum of the weft thread store.
  • the leaf spring strip has a locking pin which, in the position of use, ie when the bobbin is not activated, engages in a recess in the drum of the weft thread store. As described in more detail above, the leaf spring strip is lifted and thus the locking pin is pulled out, so that the desired thread windings are released very quickly. This is a particular advantage of the present electromagnetic device for this intended purpose.
  • the electromagnetic device is also intended to be used in relation to the relay nozzles, which can be arranged along the weft channel in the shed.
  • the electromagnetic device is designed as a relay nozzle valve.
  • This ball is then assigned to a mouth of the relay nozzle valve.
  • the entire electromagnetic device can be arranged in a hermetically sealed housing which has a compressed air connection.
  • the electromagnetic device as a thread brake or as a stretching nozzle for the weft thread tip on the catching side of the weaving machine, in which case a counter surface interacts with the leaf spring strip.
  • This counter surface can be a frame, a housing, the above-mentioned shielding plate or the damping strip itself, or the contact surface of the pole body is designed as a counter surface.
  • the leaf spring strip is deformed more or less, which also changes the braking effect on the thread. This allows a laterally variable braking effect to be achieved on the thread according to a specific program.
  • an electromagnetic device P has a frame 1 which is fastened to a device part 2 or support element assigned to it. As shown in FIG. 2, this frame 1 can also form a housing 4 together with a corresponding side wall 3.
  • pole bodies 5 which are spaced apart from one another. Both pole bodies 5 are connected to one another or to the housing via a core 6 and a connecting element 7 which is only indicated by dashed lines.
  • the core 6 is surrounded by a coil 8, which are connected to a current source or a regulator (not shown in more detail) via corresponding lines 9.
  • the pole bodies 5 have a curved contact surface 10 for a leaf spring strip 11.
  • This leaf spring strip 11 is also fixed to the frame 1 or housing 4 by means of a corresponding fastening element 12, which is only indicated by dashed lines.
  • this leaf spring strip 11 has a locking pin 13 which engages in a recess 14 of a weft thread store 15 when the electromagnetic device P is not activated. In this position, it prevents further thread windings of a thread 16 from being pulled off the drum 17 of the weft thread store 15. In this way, the start and end of the pulling-off process are controlled by the locking pin 13.
  • the contact with the pole body 5 occurs tangentially point by point.
  • a counterforce is built up over the free length of the leaf spring strip 11.
  • the total electromagnetic force acting on the leaf spring strip 11 is relatively high due to the length of the leaf spring strip 11, especially since the counterforce generated by the bend is relatively low.
  • the locking pin 13 can be significantly extended from the recess 14.
  • a high counterforce must be overcome because of the bend, so that the electromagnetic force must be significantly increased here.
  • the electromagnetic force is advantageously to be selected such that it is in equilibrium with the counterforce of the leaf spring strip 11 when the leaf spring strip 11 lies completely against the contact surface 10.
  • the two pole bodies 5 are formed relatively thin, so that a fast magnetic induction is possible through them.
  • the frame 1 consists of a U-shaped spacer and mounting bracket 19, the two free legs 20 and 21 being connected to each other via a shielding plate 22.
  • the underside of this shielding plate 22 is finely plastered and wear-resistant.
  • the shielding plate 22 has an elongated hole 23 in which a thin plate 24 fits. Its underside is also finely plastered and wear-resistant. Furthermore, this thin sheet is vulcanized on the damping strip 18, whereby more mass is obtained and the "bouncing" is reduced. The yarn path is also shielded.
  • the damping strip 18 also covers the shielding plate 22.
  • the damping strips 18 and thin sheet 24 have a slot 25 and 26, respectively, which can be penetrated by the locking pin 13. This locking pin 13 is fixed to the leaf spring strip 11.
  • FIG. 4 shows the use of the electromagnetic device as a valve for relay nozzles 30.
  • These relay nozzles 30 are located in the region of the weft channel for the thread and are supplied with compressed air by a compressed air connection 31 in the housing 4 when the leaf spring strip 11 is in the position shown in the dot-and-dash line.
  • the leaf spring strip 11 is fitted with a ball 32, by means of which a ball 32 Ball valve an inlet mouth 33 of the relay nozzle 30 can be closed.
  • the electromagnetic device P according to the invention can also be used as a thread feed brake.
  • the leaf spring strip 11 is provided without any addition.
  • two guides of the thread 16 are possible as the thread inlet brake.
  • the solid line of the thread 16 in FIG. 5 shows that the thread is guided along the frame 1 or the housing 4. It should be necessary that the leaf spring strip 11 has a slot 11 'of a certain length along its longitudinal axis, so that the thread 16 can be guided freely when the leaf spring strip 11 is tightened.
  • the second possibility is that the thread 16, as shown in dashed lines, runs along the contact surface 10 of the pole body 5 on a strip 10 'connecting these. The thread is then braked by activating the bobbin 8.
  • a whole series of embodiments are also conceivable and are intended to be encompassed by the invention.
  • the device P can also be used as a stretching device for the weft thread 16 after the insertion, as shown in FIG.
  • the weft thread 16 lies in the extended position along the relay nozzle in the device P between the leaf spring strip 11 and the pole body 5.
  • the thread comes into position 16 'between a deflecting element 5' and the leaf spring strip 11 and will so additionally stretched.
  • Figure 7 shows a partial view according to arrow VII.
  • Figure 6 the position of the thread 16 on the leaf spring strip 11 and the formation of the slot 11 '.
  • An additional relay nozzle can facilitate the insertion of the thread 16 into the slot 11 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Electromagnets (AREA)

Claims (5)

1. Dispositif électromagnétique pour métiers à tisser avec un réservoir de fil de trame composé d'un tambour fixe (17) pour l'enroulement du fil de trame (16) à la circonférence du tambour, le dispositif (P) maintenant le fil de trame (16) sur l'extrémité côté sortie du tambour (17) à l'aide d'un dispositif de retenue à la surface du tambour caractérisé en ce qu'une broche à déclic (13) est commandée par un dispositif électromagnétique (P) disposé à l'extérieur du tambour (17) qui se compose d'une bobine (8) pouvant être raccordée à un conducteur électrique et d'au moins un corps polaire (5) affecté à celle-ci, le corps polaire (5) étant affecté à un ressort à lames en bande (11) logé de manière fixe par une extrémité et en ce que le corps polaire (5) présente une surface d'application (10) pour le ressort à lames en bande (11), le ressort à lames en bande (11) étant disposé à l'état non sollicité, en l'absence d'un champ magnétique, obliquement par rapport à la surface d'application (10) de sorte que, en cas de formation du champ magnétique dans la bobine (8) et le corps polaire (5), ce soit d'abord la région extrême du ressort à lames en bande (11) qui s'applique contre la surface d'application (10) du corps polaire (5) et que, en cas d'amplification du champ magnétique, des zones toujours plus grandes du ressort à lames en bande (11) s'appliquent contre le corps polaire (5) et que la broche à déclic (13) soit fixée avec le ressort à lames en bande (11) et que la broche à déclic (13) s'insère dans une cavité (14) du tambour (17).
2. Dispositif électromagnétique selon la revendication 1 caractérisé en ce qu'au moins un segment de la surface d'application (10) ou du ressort à lames en bande (11) est de conception incurvée.
3. Dispositif électromagnétique selon la revendication 1 ou 2 caractérisé en ce qu'une bande d'amortissement (18) est affectée au ressort à lames en bande (11) de l'autre côté de la surface d'application (10).
4. Dispositif électromagnétique selon la revendication 3 caractérisé en ce que cette bande d'amortissement (18) est fixée à une tôle mince (24) de l'autre côté du ressort à lamer en bande (11).
5. Dispositif électromagnétique selon la revendication 4 caractérisé en ce que la bande d'amortissement (18) est appliquée contre une tôle de protection (22), la tôle mince (24) étant insérée dans un orifice longitudinal (23).
EP89810294A 1988-05-20 1989-04-19 Dispositif électromagnétique pour métiers à tisser Expired - Lifetime EP0344100B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1934/88 1988-05-20
CH193488 1988-05-20

Publications (2)

Publication Number Publication Date
EP0344100A1 EP0344100A1 (fr) 1989-11-29
EP0344100B1 true EP0344100B1 (fr) 1992-07-08

Family

ID=4222011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810294A Expired - Lifetime EP0344100B1 (fr) 1988-05-20 1989-04-19 Dispositif électromagnétique pour métiers à tisser

Country Status (4)

Country Link
US (1) US5007464A (fr)
EP (1) EP0344100B1 (fr)
JP (1) JP2788058B2 (fr)
DE (1) DE58901799D1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0436197B1 (fr) * 1989-12-29 1995-03-29 ROJ ELECTROTEX S.p.A. Fournisseur de trame pour métiers à jet de fluide
EP0521819A1 (fr) * 1991-07-05 1993-01-07 GebràœDer Sulzer Aktiengesellschaft Dispositif de stockage de fil de trame pour un métier à tisser
DE4127798A1 (de) * 1991-08-22 1993-02-25 Iro Ab Messfournisseur
US5590693A (en) * 1994-07-19 1997-01-07 L.G.L. Electronics S.P.A. Rotatable thread arrester for weft feeders for air-jet looms
EP0953664A1 (fr) * 1998-04-28 1999-11-03 Sulzer Rüti Ag Dispositif pour couper un fil de trame à insérer et système pour insérer un fil de trame avec un tel dispositif
EP1811068B1 (fr) * 2006-01-24 2009-06-17 Sultex AG Frein de trame avec commande
CN103334207A (zh) * 2013-06-13 2013-10-02 苏州市丹纺纺织研发有限公司 一种喷气织机全封闭式管道片
JP7401397B2 (ja) * 2020-06-04 2023-12-19 津田駒工業株式会社 織機
JP7384747B2 (ja) * 2020-06-04 2023-11-21 津田駒工業株式会社 織機
JP7477372B2 (ja) * 2020-06-04 2024-05-01 津田駒工業株式会社 織機
US12606130B2 (en) * 2023-06-01 2026-04-21 ZF Active Safety US Inc. Electromechanical brake for vehicle

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB448948A (en) * 1935-01-18 1936-06-18 Norman Hall Improvements in or relating to electro-magnets for use in organs
FR1161662A (fr) * 1956-11-21 1958-09-03 Perfectionnements aux dispositifs tendeurs de fils
US2952801A (en) * 1956-11-28 1960-09-13 Cutler Hammer Inc Electromagnetic device and method of making
CH1031267A4 (fr) * 1966-06-17 1971-09-15
US3563026A (en) * 1967-06-15 1971-02-16 Metall Invent Sa Electromagnetic actuating apparatus for clockwork mechanisms
US3812691A (en) * 1969-10-07 1974-05-28 Terrot Soehne & Co C Jack and needle actuator for a circular knitting machine
NL7217620A (fr) * 1972-12-22 1974-06-25
DE2364680C2 (de) * 1973-12-27 1982-08-26 Rüti-te Strake B.V., 5750 Deurne Solenoidbetätigte Fadenklemme bzw. -schneidvorrichtung oder dergleichen für Webmaschinen
GB1562187A (en) * 1975-08-21 1980-03-05 Camber Int Uk Ltd Knittingmachine
DE2907008C2 (de) * 1979-02-23 1987-04-02 Sulzer Morat Gmbh, 7024 Filderstadt Steuermagnetsystem
CH657162A5 (de) * 1982-07-01 1986-08-15 Textilma Ag Fachbildevorrichtung fuer eine webmaschine.
DE3446567C1 (de) * 1984-12-20 1986-05-07 Lindauer Dornier Gmbh, 8990 Lindau Schussfadenbremse mit stufenweise steuerbarer Bremswirkung
CH670116A5 (fr) * 1986-04-28 1989-05-12 Univ Kazakhsky
DE3761444D1 (de) * 1986-06-16 1990-02-22 Sulzer Ag Schussfadenspeicher fuer webmaschine.
DE3628485A1 (de) * 1986-08-22 1988-02-25 Iro Ab Geraet zum speichern von garn
DE3637919A1 (de) * 1986-11-06 1988-05-19 Dornier Gmbh Lindauer Schussfadenbremse mit steuerbarer bremswirkung fuer schuetzenlose webmaschinen

Also Published As

Publication number Publication date
JPH0219547A (ja) 1990-01-23
EP0344100A1 (fr) 1989-11-29
US5007464A (en) 1991-04-16
JP2788058B2 (ja) 1998-08-20
DE58901799D1 (de) 1992-08-13

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