EP0098428B1 - Shedding mechanism for looms - Google Patents

Shedding mechanism for looms Download PDF

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Publication number
EP0098428B1
EP0098428B1 EP83105925A EP83105925A EP0098428B1 EP 0098428 B1 EP0098428 B1 EP 0098428B1 EP 83105925 A EP83105925 A EP 83105925A EP 83105925 A EP83105925 A EP 83105925A EP 0098428 B1 EP0098428 B1 EP 0098428B1
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EP
European Patent Office
Prior art keywords
rods
electromagnet
mechanism according
retaining
armature
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Expired
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EP83105925A
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German (de)
French (fr)
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EP0098428A2 (en
EP0098428A3 (en
Inventor
Robert R. Bucher
Gerard A. Durville
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Textilma AG
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Textilma AG
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Publication of EP0098428A2 publication Critical patent/EP0098428A2/en
Publication of EP0098428A3 publication Critical patent/EP0098428A3/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/20—Electrically-operated jacquards

Definitions

  • the present invention relates to a shedding device for a weaving machine, in particular a jacquard machine, with two rods connected at one end to the heald, which can be moved between an upper and lower position, with the rods associated with flexible holding elements held at one end in a holder, in order to hold the flexible rods Hold rods in an end position, wherein the associated rods and holding elements are provided at the mutually facing ends with complementary sections which can be brought into engagement with one another, and with an electromagnet which has a double T-shaped core with differently wide boundary flange parts and the holding elements are held on the holder such that an air gap is present between a flange part and the holding elements in order to deflect the holding elements against one another and to bring the rods and holding elements assigned to one another into and out of engagement.
  • a shedding device for a jacquard machine contains two rods which are moved back and forth by assigned knives, are connected at one end to a strand guided over the pulley, and at the other end have means for holding the rods in one position, a holding device which can be brought into and out of engagement with the means on the rods and a control device for bringing the rods into and out of engagement with the holding device.
  • the advantages of the present invention are essentially to be seen in the fact that by adjusting the air gap between the narrower flange part and the anchor part, the tightening force to be applied can be kept considerably lower, and therefore a relatively low supply voltage is required to excite the electromagnet and that the function of the Only one holding element is decisive, namely that which is assigned to the rod moving in the direction of the electromagnet.
  • the holding element is made of stainless spring steel, when the holding element is prestressed, in such a way that it has a restoring force with an egg in the deflected state nem setpoint that is matched to the holding force of the electromagnet, and when the holder is provided with two stop elements.
  • the movement of the holding elements away from the electromagnet can be limited and, on the other hand, the vibrations that occur when the holding elements are reset can also be damped in an advantageous manner, as a result of which perfect functioning can be ensured.
  • the shedding device contains two rods 1 which are arranged at a distance from one another and can be moved up and down by assigned knives 2.
  • the rods 1 are connected in a known manner at one end to the strand 3, which is guided via the block and tackle 4 which produces the connection to the warp threads.
  • the rods 1 are provided with a hook 5 and guided in a guide device 6a, 6b.
  • the rods 1 are guided on both sides by guide pieces in order to prevent them from being deflected when the rods 1 are displaced in the direction of the electromagnet 10.
  • a holding element 7 is assigned to each rod 1.
  • the holding elements 7 are cast at a distance which is substantially equal to the distance between the rods 1, at one end in a holder 8 made of plastic and at the other, the free end with an opening 9 into which the hook 5 of the corresponding rod 1 can intervene.
  • An electromagnet 10 is arranged between the holding elements 7 and consists of an I-shaped core 11 with rectangular flange parts 12, 13 of different widths and a winding 14. The electromagnet is attached to the holder 8 so that the narrower flange part 13 is closer to the free end of the holding elements 7.
  • the surfaces 18, 19 of the flange parts 12, 13 facing the anchor parts 15 are formed lying in one plane, so that the anchor parts 15 can be placed on the surfaces 19 of the flange parts 12.
  • a stop 23 can also be provided, which is formed on the holder 8, as can be seen from FIG. 1.
  • Two stop elements 20 are provided on the holder 8, which form two mutually opposite stop surfaces in order to limit the movement of the holding elements 7 in the direction away from the electromagnet 10.
  • the stainless steel spring element 7 is mounted under pretension, so that the holding element 7 in the deflected state has a restoring force that is matched to the holding force of the electromagnet 10 and in the reset state fits snugly against the stop surfaces of the stop elements 20.
  • FIG. 2 shows the operating state in which the knife 2 shown on the left in FIG. 2 is already slightly raised and the knife 2 shown on the right is correspondingly slightly lowered.
  • the rod 2 and the associated holding element 7 are in contact with one another in this position, as a result of which the holding element 7 has already been deflected.
  • This deflection of the holding element 7 continues until the rod 1 has reached the upper position, as shown in FIG. 3.
  • the air gap between the armature part 15 and the surface 18 of the narrower flange part 13 is set to a predetermined value and the knife 2 is now lowered.
  • the hook 5 on the rod 2 will engage in the opening 9 on the holding element 7 when the knife 2 is lowered, and the rod 2 will be held in its position, although the knife is further lowered, as shown in FIG. 4 is shown.
  • the armature part 15 is pulled by the magnetic field against the surface 18 of the narrower flange part 13.
  • the anchor part 15 bears against the surfaces 19 of the two flange parts 12, while the film 22 bears against the surface 18 of the narrower flange part 13 or the holding element 7 against the stop 23.
  • the lowering rod 15 can now engage with its hook 5 in the opening 9 of the holding element 7 and is thus lowered into the other end position.
  • the other holding element 7 is not deflected, even when the electromagnet 10 is energized. In this case, this only takes place when this holding element 7 the associated rod (not shown) has been deflected such that the air gap between the surfaces of the flange parts 13 and the anchor part 15 has the predetermined value.
  • Fig. 7 shows a modified embodiment of the holding element 7.
  • a projection 21 is formed next to the opening 9, which comes into contact with the hook 5 when the rod 1 is lifted. This allows the air gap to be set to a smaller value. The magnetic field to be generated by the electromagnet can then be further reduced.

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

Description

Die vorliegende Erfindung betrifft eine Fachbildevorrichtung für eine Webmaschine, insbesondere Jacquardmaschine mit zwei an einem Ende mit der Litze verbundenen Stäben, die zwischen einer oberen und unteren Stellung bewegbar sind, mit den Stäben zugeordneten, an einem Ende in einem Halter gehaltenen flexiblen Halteelementen, um die Stäbe in einer Endstellung zu halten, wobei die einander zugeordneten Stäbe und Halteelemente an den einander zugekehrten Enden mit komplementär ausgebildeten Abschnitten versehen sind, die miteinander in Eingriff bringbar sind, und mit einem Elektromagneten, der einen doppel T-förmigen Kern mit unterschiedlich breiten Begrenzungsflanschteilen aufweist und den Halteelementen am Halter so gehalten ist, dass zwischen einem Flanschteil und den Halteelementen jeweils ein Luftspalt vorhanden ist, um die Halteelemente gegeneinander auszulenken und die einander zugeordneten Stäbe und Halteelemente in und ausser Eingriff zu bringen.The present invention relates to a shedding device for a weaving machine, in particular a jacquard machine, with two rods connected at one end to the heald, which can be moved between an upper and lower position, with the rods associated with flexible holding elements held at one end in a holder, in order to hold the flexible rods Hold rods in an end position, wherein the associated rods and holding elements are provided at the mutually facing ends with complementary sections which can be brought into engagement with one another, and with an electromagnet which has a double T-shaped core with differently wide boundary flange parts and the holding elements are held on the holder such that an air gap is present between a flange part and the holding elements in order to deflect the holding elements against one another and to bring the rods and holding elements assigned to one another into and out of engagement.

Eine Fachbildevorrichtung für eine Jacquardmaschine enthält bekanntlich zwei Stäbe, die durch zugeordnete Messer hin- und herbewegt werden, an einem Ende mit einer über den Flaschenzug geführten Litze verbunden sind und am anderen Ende Mittel aufweist, um die Stäbe in einer Stellung zu halten, eine Halteeinrichtung, die mit den Mitteln an den Stäben in und ausser Eingriff bringbar sind, und eine Steuervorrichtung, um die Stäbe mit der Halteeinrichtung in und ausser Eingriff zu bringen.As is known, a shedding device for a jacquard machine contains two rods which are moved back and forth by assigned knives, are connected at one end to a strand guided over the pulley, and at the other end have means for holding the rods in one position, a holding device which can be brought into and out of engagement with the means on the rods and a control device for bringing the rods into and out of engagement with the holding device.

In der GB-A 2 047 755 ist eine derartige Vorrichtung beschrieben, bei der die Halteeinrichtung und Steuervorrichtung zu einer Baueinheit kombiniert ist. Diese Baueinheit, nachfolgend als Steuereinrichtung bezeichnet, weist zwei flexible Halteelemente und einen Elektromagneten auf, der zwischen den Halteelementen angeordnet ist, um die Halteelemente bezüglich dem Elektromagneten auszulenken und die Halteelemente und die Stäbe in und ausser Eingriff zu bringen. Die Halteelemente sind an einem Ende an einem Halter befestigt, von dem auch der Elektromagnet mit einem freiliegenden Kernteil absteht. Am Halteelement und am Stab sind jeweils ein Haken bzw. eine Öffnung vorgesehen.Such a device is described in GB-A 2 047 755 in which the holding device and control device are combined to form a structural unit. This assembly, hereinafter referred to as the control device, has two flexible holding elements and an electromagnet which is arranged between the holding elements in order to deflect the holding elements with respect to the electromagnet and to bring the holding elements and the rods into and out of engagement. The holding elements are attached at one end to a holder, from which the electromagnet also projects with an exposed core part. A hook and an opening are provided on the holding element and on the rod.

Wird während des Betriebes ein Stab durch das zugeordnete Messer angehoben, so wird das entsprechende Halteelement mit seinem Haken in die Öffnung am Stab eingreifen und den Stab zurückhalten, wenn der Elektromagnet entregt ist. Ist der Elektromagnet dagegen erregt, so wird das Halteelement gegen den freiliegenden Kernteil des Elektromagneten gezogen, so dass der Haken am Halteelement nicht in die Öffnung eingreifen kann.If a rod is raised by the associated knife during operation, the corresponding holding element will engage with its hook in the opening on the rod and hold the rod back when the electromagnet is de-energized. If, on the other hand, the electromagnet is excited, the holding element is pulled against the exposed core part of the electromagnet, so that the hook on the holding element cannot engage in the opening.

Diese Ausführungsform hat im wesentlichen den Nachteil, dass ein relativ starkes Magnetfeld aufgebaut werden muss, um beide Halteelemente gegen den freiliegenden Kernteil zu ziehen, wobei die Abschwächung des Magnetfeldes zu berück- sichtigen ist, die durch das unsynchrone Anziehen der Halteelemente durch den Elektromagneten und der damit vorzeitigen Schliessung des magnetischen Kreises auf einer Seite des Elektromagneten bewirkt wird. Dies setzt eine hohe Leistung des Elektromagneten voraus, wodurch eine stärkere und unerwünschte Erwärmung auftritt. Einer Verminderung der Leistungsaufnahme des Elektromagneten durch Verringerung des Luftspaltes sind Grenzen gesetzt, weil wegen der Ausbildung des Hakens eine bestimmte Auslenkbewegung erforderlich ist und weil die Halteelemente aufgrund der Federwirkung aus unmagnetischem Material bestehen und deren Remanenz relativ gross ist.This embodiment has substantially the disadvantage that a relatively strong magnetic field are constructed must, in order to draw both holding elements against the exposed core part, wherein the attenuation of the magnetic field to be taken into - is into account, by the unsynchronized attracting the holder parts by the electromagnet and the to cause premature closure of the magnetic circuit on one side of the electromagnet. This requires a high performance of the electromagnet, which results in a stronger and undesirable heating. There are limits to reducing the power consumption of the electromagnet by reducing the air gap because a certain deflection movement is necessary because of the design of the hook and because the holding elements are made of non-magnetic material due to the spring action and their remanence is relatively large.

Hier will die Erfindung Abhilfe schaffen. Die Erfindung, wie sie im Patentanspruch 1 gekennzeichnet ist, löst die Aufgabe, eine Fachbildevorrichtung der eingangs genannten Art zu schaffen, bei der durch die Ausbildung des Kernes mit unterschiedlich breiten Flanschteilen, die Anwendung von Ankerteilen und die Einstellung des Luftspaltes zwischen dem schmaleren Flanschteil und dem Ankerteil einerseits, die Leistungsaufnahme des Elektromagneten herabsetzt und die unerwünschte Erwärmung verringert wird und andererseits das Anziehen der Ankerteile gewährleistet ist, selbst wenn der magnetische Kreis über die Flanschteile auf der einen Seite des Elektromagneten durch einen Ankerteil bereits geschlossen ist.The invention seeks to remedy this. The invention, as characterized in claim 1, solves the problem of creating a shedding device of the type mentioned, in which by the formation of the core with flange parts of different widths, the use of anchor parts and the adjustment of the air gap between the narrower flange part and the armature part on the one hand, the power consumption of the electromagnet is reduced and the undesired heating is reduced and on the other hand the attraction of the armature parts is ensured, even if the magnetic circuit is already closed by an armature part via the flange parts on one side of the electromagnet.

Die Vorteile der vorliegenden Erfindung sind im wesentlichen darin zu sehen, dass durch die Einstellung des Luftspaltes zwischen dem schmaleren Flanschteil und Ankerteil die aufzubringende Anzugskraft erheblich niedriger gehalten werden kann und dadurch zum Erregen des Elektromagneten eine relativ niedrige Speisespannung erforderlich ist und dass für die Funktion der Vorrichtung nur ein Halteelement massgebend ist und zwar jenes, welches dem jeweils in Richtung des Elektromagneten bewegten Stabes zugeordnet ist.The advantages of the present invention are essentially to be seen in the fact that by adjusting the air gap between the narrower flange part and the anchor part, the tightening force to be applied can be kept considerably lower, and therefore a relatively low supply voltage is required to excite the electromagnet and that the function of the Only one holding element is decisive, namely that which is assigned to the rod moving in the direction of the electromagnet.

Bei einem Ausführungsbeispiel der Erfindung ist an einem der einander zugeordneten Stäbe und Halteelemente ein Vorsprung neben den komplementär ausgebildeten Abschnitten vorgesehen.In one embodiment of the invention, a projection is provided on one of the mutually associated rods and holding elements next to the complementary sections.

Dies hat den Vorteil, dass der Luftspalt zwischen dem Ankerteil und dem Kern auf Mindestmass einstellbar ist, so dass die Leistungsaufnahme auf einem minimalen Wert herabgesetzt werden kann.This has the advantage that the air gap between the armature part and the core can be set to a minimum, so that the power consumption can be reduced to a minimum value.

Um die Remanenz klein zu halten, ist es von Vorteil, wenn ein Mittel aus nicht magnetisierbarem Material vorgesehen ist, derart, dass bei ausgelenktem Halteelement zwischen dem schmaleren Flanschteil und dem Ankerteil ein vorbestimmter Abstand vorhanden ist. Dadurch kann die Gefahr, dass das Halteelement sich bei entregtem Elektromagnet nicht zurückstellt, beseitigt werden und das Halteelement so ausgelegt wird, dass es im wesentlichen nur die Rückstellung bewirken muss.In order to keep the remanence small, it is advantageous if a means made of non-magnetizable material is provided, such that a predetermined distance is present between the narrower flange part and the armature part when the holding element is deflected. As a result, the risk that the holding element will not reset itself when the electromagnet is de-energized can be eliminated and the holding element is designed such that it essentially only has to effect the reset.

Ferner ist es von Vorteil, wenn das Halteelement aus rostfreiem Federstahl besteht, wenn das Halteelement vorgespannt ist, derart, dass es im ausgelenkten Zustand eine Rückstellkraft mit einem Sollwert aufweist, der auf die Haltekraft des Elektromagneten abgestimmt ist, und wenn der Halter mit zwei Anschlagelementen versehen ist. Dadurch kann einerseits die Bewegung der Halteelemente weg vom Elektromagnet begrenzt und andererseits die bei der Rückstellung der Halteelemente auftretenden Schwingungen auch in vorteilhafter Weise gedämpft werden, wodurch eine einwandfreie Funktion gewährleistet werden kann.Furthermore, it is advantageous if the holding element is made of stainless spring steel, when the holding element is prestressed, in such a way that it has a restoring force with an egg in the deflected state nem setpoint that is matched to the holding force of the electromagnet, and when the holder is provided with two stop elements. As a result, on the one hand, the movement of the holding elements away from the electromagnet can be limited and, on the other hand, the vibrations that occur when the holding elements are reset can also be damped in an advantageous manner, as a result of which perfect functioning can be ensured.

Im folgenden wird die Erfindung anhand der beiliegenden Figuren näher erläutert. Es zeigen:

  • Fig. 1 einen Teil eines Ausführungsbeispiels einer erfindungsgemässen Fachbildevorrichtung, die teilweise im Schnitt dargestellt ist,
  • Fig. 2-5 Darstellungen der Fachbildevorrichtung nach Fig. 1 bei verschiedenen Arbeitsstellungen,
  • Fig. 6 die Einzelheit «A» in Fig. 1 im vergrösserten Massstab, und
  • Fig. 7 eine Modifikation des in Fig. 1 dargestellten Ausführungsbeispiels.
The invention is explained in more detail below with reference to the accompanying figures. Show it:
  • 1 shows a part of an embodiment of a shedding device according to the invention, which is partially shown in section,
  • 2-5 representations of the shedding device according to FIG. 1 in different working positions,
  • Fig. 6 shows the detail "A" in Fig. 1 on an enlarged scale, and
  • Fig. 7 shows a modification of the embodiment shown in Fig. 1.

Die hier in Rede stehende Erfindung wird anhand einer Doppelhub-Offenfach-Jacquardmaschine beschrieben. Wie aus den Fig. 1-5 ersichtlich ist, enthält die Fachbildevorrichtung zwei im Abstand zueinander angeordnete Stäbe 1, die durch zugeordnete Messer 2 auf- und abbewegbar sind. Die Stäbe 1 sind in bekannter Weise an einem Ende mit der Litze 3 verbunden, die über den die Verbindung zu den Kettfäden herstellenden Flaschenzug 4 geführt ist. Am anderen, dem freien Ende, sind die Stäbe 1 mit einem Haken 5 versehen und in einer Führungseinrichtung 6a, 6b geführt. Wie aus Fig. 1 ersichtlich ist, werden die Stäbe 1 beidseitig durch Führungsstücke geführt, um beim Verschieben der Stäbe 1 in Richtung zum Elektromagneten 10 eine Auslenkung derselben zu verhindern.The invention in question is described on the basis of a double-stroke open-pocket jacquard machine. As can be seen from FIGS. 1-5, the shedding device contains two rods 1 which are arranged at a distance from one another and can be moved up and down by assigned knives 2. The rods 1 are connected in a known manner at one end to the strand 3, which is guided via the block and tackle 4 which produces the connection to the warp threads. At the other, the free end, the rods 1 are provided with a hook 5 and guided in a guide device 6a, 6b. As can be seen from FIG. 1, the rods 1 are guided on both sides by guide pieces in order to prevent them from being deflected when the rods 1 are displaced in the direction of the electromagnet 10.

Jedem Stab 1 ist ein Halteelement 7 zugeordnet. Die Halteelemente 7 sind in einem Abstand, der im wesentlichen gleich dem Abstand der Stäbe 1 ist, an einem Ende in einem Halter 8 aus Kunststoff eingegossen und am anderen, dem freien Ende mit einer Öffnung 9 versehen, in die der Haken 5 des entsprechenden Stabes 1 eingreifen kann. Zwischen den Halteelementen 7 ist ein Elektromagnet 10 angeordnet, der aus einem I-förmigen Kern 11 mit rechteckförmigen Flanschteilen 12, 13 unterschiedlicher Breite und einer Wicklung 14 besteht. Der Elektromagnet ist am Halter 8 so befestigt, dass der schmalere Flanschteil 13 näher beim freien Ende der Halteelemente 7 liegt. An der dem Elektromagneten 10 abgewandten Seite der Halteelemente 7 sind Ankerteile 15 befestigt und so angeordnet, dass sie einerseits am breiteren Flanschteil 12 anliegen und andererseits zwischen diesen und dem schmaleren Flanschteil 13 ein Luftspalt vorhanden ist. Zu diesem Zwecke sind in den Halteelementen 7 Löcher 16, 17 vorgesehen.A holding element 7 is assigned to each rod 1. The holding elements 7 are cast at a distance which is substantially equal to the distance between the rods 1, at one end in a holder 8 made of plastic and at the other, the free end with an opening 9 into which the hook 5 of the corresponding rod 1 can intervene. An electromagnet 10 is arranged between the holding elements 7 and consists of an I-shaped core 11 with rectangular flange parts 12, 13 of different widths and a winding 14. The electromagnet is attached to the holder 8 so that the narrower flange part 13 is closer to the free end of the holding elements 7. On the side of the holding elements 7 facing away from the electromagnet 10, armature parts 15 are fastened and arranged in such a way that on the one hand they rest on the wider flange part 12 and on the other hand an air gap is present between them and the narrower flange part 13. For this purpose, holes 16, 17 are provided in the holding elements 7.

Die den Ankerteilen 15 zugewandten Flächen 18, 19 der Flanschteile 12, 13 sind in einer Ebene liegend ausgebildet, so dass die Ankerteile 15 auf die Flächen 19 der Flanschteile 12 auflegbar sind.The surfaces 18, 19 of the flange parts 12, 13 facing the anchor parts 15 are formed lying in one plane, so that the anchor parts 15 can be placed on the surfaces 19 of the flange parts 12.

Die Halteelemente 7 bestehen aus nicht magnetisierbarem Material, z. B. rostfreiem Federstahl, während die Ankerteile 15 aus magnetisierbarem Material, z. B. Weicheisen bestehen. Um die Remanenz des Halteelementes 7 klein zu halten, wird eine Folie 22 aus nicht magnetisierbarem Material auf einem Flächenbereich des Ankerteiles 15 befestigt, der die Fläche 18 des schmaleren Flanschteiles 13 zugewandt ist (Fig. 6).The holding elements 7 consist of non-magnetizable material, for. B. stainless spring steel, while the anchor parts 15 made of magnetizable material, for. B. soft iron exist. In order to keep the remanence of the holding element 7 small, a film 22 made of non-magnetizable material is fastened on a surface area of the anchor part 15 which faces the surface 18 of the narrower flange part 13 (FIG. 6).

Es kann aber auch ein Anschlag 23 vorgesehen werden, der am Halter 8 ausgebildet ist, wie dies aus Fig. 1 ersichtlich ist.However, a stop 23 can also be provided, which is formed on the holder 8, as can be seen from FIG. 1.

Am Halter 8 sind zwei Anschlagelemente 20 vorgesehen, die zwei einander gegenüberliegende Anschlagflächen bilden, um die Bewegung der Halteelemente 7 in Richtung weg vom Elektromagneten 10 zu begrenzen.Two stop elements 20 are provided on the holder 8, which form two mutually opposite stop surfaces in order to limit the movement of the holding elements 7 in the direction away from the electromagnet 10.

Das aus rostfreiem Federstahl bestehende Halteelement 7 wird unter Vorspannung montiert, so dass das Halteelement 7 in ausgelenktem Zustand eine Rückstellkraft aufweist, die auf die Haltekraft des Elektromagneten 10 abgestimmt ist und im zurückgestellten Zustand satt an den Anschlagflächen der Anschlagelemente 20 anliegt.The stainless steel spring element 7 is mounted under pretension, so that the holding element 7 in the deflected state has a restoring force that is matched to the holding force of the electromagnet 10 and in the reset state fits snugly against the stop surfaces of the stop elements 20.

Nachfolgend wird die Funktion der vorstehend beschriebenen Vorrichtung mit Bezug auf die Fig. 2 bis 5 beschrieben.The function of the device described above is described below with reference to FIGS. 2 to 5.

Die Fig. 2 zeigt den Betriebszustand bei dem das in der Fig. 2 links dargestellte Messer 2 bereits leicht angehoben und das rechts dargestellte Messer 2 entsprechend leicht abgesenkt ist. Wie gezeigt, stehen in dieser Stellung der Stab 2 und das zugeordnete Halteelement 7 miteinander in Berührung, wodurch das Halteelement 7 bereits ausgelenkt worden ist. Diese Auslenkung des Halteelementes 7 erfolgt so lange, bis der Stab 1 die obere Stellung erreicht hat, wie dies in Fig. 3 dargestellt ist. In dieser Stellung ist der Luftspalt zwischen dem Ankerteil 15 und der Fläche 18 des schmaleren Flanschteiles 13 auf einen vorbestimmten Wert eingestellt und das Messer 2 wird nun abgesenkt.FIG. 2 shows the operating state in which the knife 2 shown on the left in FIG. 2 is already slightly raised and the knife 2 shown on the right is correspondingly slightly lowered. As shown, the rod 2 and the associated holding element 7 are in contact with one another in this position, as a result of which the holding element 7 has already been deflected. This deflection of the holding element 7 continues until the rod 1 has reached the upper position, as shown in FIG. 3. In this position, the air gap between the armature part 15 and the surface 18 of the narrower flange part 13 is set to a predetermined value and the knife 2 is now lowered.

Ist der Elektromagnet 10 nicht erregt, so wird der Haken 5 am Stab 2 bei der Absenkung des Messers 2 in die Öffnung 9 am Halteelement 7 eingreifen und der Stab 2 in seiner Stellung zurückgehalten, obwohl das Messer weiter abgesenkt wird, wie das in Fig. 4 dargestellt ist.If the electromagnet 10 is not energized, the hook 5 on the rod 2 will engage in the opening 9 on the holding element 7 when the knife 2 is lowered, and the rod 2 will be held in its position, although the knife is further lowered, as shown in FIG. 4 is shown.

Ist der Elektromagnet 10 dagegen erregt, wird der Ankerteil 15 durch das Magnetfeld gegen die Fläche 18 des schmaleren Flanschteiles 13 gezogen. In diesem Fall liegt der Ankerteil 15 an den Flächen 19 der beiden Flanschteile 12 an, während die Folie 22 an der Fläche 18 des schmaleren Flanschteiles 13 oder das Halteelement 7 am Anschlag 23 anliegt. Dies bewirkt eine weitere Auslenkung der Halteelemente 7, wie in Fig. 5 dargestellt ist. Der sich absenkende Stab 15 kann nun mit seinem Haken 5 nicht in die Öffnung 9 des Halteelementes 7 eingreifen und wird somit in die andere Endstellung abgesenkt.If, on the other hand, the electromagnet 10 is excited, the armature part 15 is pulled by the magnetic field against the surface 18 of the narrower flange part 13. In this case, the anchor part 15 bears against the surfaces 19 of the two flange parts 12, while the film 22 bears against the surface 18 of the narrower flange part 13 or the holding element 7 against the stop 23. This causes a further deflection of the holding elements 7, as shown in FIG. 5. The lowering rod 15 can now engage with its hook 5 in the opening 9 of the holding element 7 and is thus lowered into the other end position.

Wie aus Fig. 5 ersichtlich ist, wird das andere Halteelement 7 nicht ausgelenkt, selbst wenn der Elektromagnet 10 erregt ist. Dies erfolgt in diesem Fall erst dann, wenn dieses Halteelement 7 durch den zugeordneten Stab (nicht dargestellt) so ausgelenkt worden ist, dass der Luftspalt zwischen den Flächen der Flanschteile 13 und dem Ankerteil 15 den vorbestimmten Wert hat.As can be seen from FIG. 5, the other holding element 7 is not deflected, even when the electromagnet 10 is energized. In this case, this only takes place when this holding element 7 the associated rod (not shown) has been deflected such that the air gap between the surfaces of the flange parts 13 and the anchor part 15 has the predetermined value.

Aus der vorstehenden Beschreibung wird deutlich, dass die vorstehend beschriebene Vorrichtung gegenüber der bekannten Vorrichtung mit zwei exakten Steuerzeitpunkten arbeitet, bei denen die Auslenkung des Halteelementes 7 mit Sicherheit auf der für die Funktion erforderlichen Seite erfolgt.From the above description it is clear that the device described above operates with two exact control points in time compared to the known device, at which the deflection of the holding element 7 is carried out with certainty on the side required for the function.

Fig. 7 zeigt eine modifizierte Ausführung des Halteelementes 7. Bei diesem Halteelement 7 ist neben der Öffnung 9 ein Vorsprung 21 ausgebildet, der beim Anheben des Stabes 1 mit dem Haken 5 in Berührung kommt. Dadurch kann der Luftspalt auf einen kleineren Wert eingestellt werden. Das vom Elektromagneten zu erzeugende Magnetfeld kann dann weiter verringert werden.Fig. 7 shows a modified embodiment of the holding element 7. In this holding element 7, a projection 21 is formed next to the opening 9, which comes into contact with the hook 5 when the rod 1 is lifted. This allows the air gap to be set to a smaller value. The magnetic field to be generated by the electromagnet can then be further reduced.

Claims (9)

1. Shedding mechanism for a loom, specifically a Jacquard machine with two rods (1) mounted at one end to a wire, which are reciprocable between an upper and a lower position, with flexible retaining elements (7) held at one end in a holder (8) to retain the rods (1) in an end position, whereby the rods (1) and corresponding retaining elements (7) have complementary shaped sections (5, 9) located at their free ends facing each other, which are movable into engagement with each other, and with an electromagnet having a double T-shaped core (11) with limiting flange sections (12, 13) of differing width and held between the retaining elements (7) at the holder (8) sueh that are- spective air gap is present between a flange section (13) and the retaining elements (7) to deflect the-retaining elements relative to each other and to move the respective rods (1) and retaining elements into and out of engagement, characterized in that an armature body (15), consisting of a soft metal is mounted to every retaining element (7) and is arranged such that the armature body (15) abuts on the one hand the broader upper flange section (12) and on the other hand is abuttable onto the narrower lower flange section (13), whereby the retaining elements (7) are alternately deflectable relative to each other by an up and down moving of the rods (1) such that in the deflected state the air gap between the narrower flange section (13) and the armature body (15) is decreased to a predetermined value and the armature body (15) is attracted in the excited condition of the electromagnet (10), and that the sides of the flange sections (12, 13) facing each other include an inclined surface (18) each, which is abutted by the deflected retaining element (7) with its armature body (15).
2. Mechanism according to claim 1, characterized in that a rod (1) or its corresponding retaining element (7) is provided with a projection (21) adjacent the complementary shaped section which cooperates with the other part (7) or (1), respectively, to allow adjustment of the air gap between the narrower flange section (13) and the armature bodies (15) to a predetermined value.
3. Mechanism according to claim 1, characterized in that the armature bodies (15) are mounted to the side of the retaining element (7) facing away from the electromagnet (10) and that the retaining elements (7) are provided with openings (17, 19) to allow contact between the armature bodies (15) and the flange sections (12, 13).
4. Mechanism according to claim 3, characterized in that means of not magnetizable material are provided, such that in case of the retaining element (7) being deflected a predetermined distance prevails between the narrower flange section (13) and the armature body (15) such to keep the remanence of the retaining element small.
5. Mechanism according to claim 4, characterized in that the means is a foil (22) mounted to the armature body (15) or to the surface (18) of the flange section (13).
6. Mechanism according to claim 4, characterized in that the means is an abutment (23) formed on the holder (8).
7. Mechanism according to claim 4, characterized in that the retaining element (7) consists of a stainless spring steel and that the retaining element is biased such that in the deflected condition it has a restoring force which is conditioned to the retaining force of the electromagnet (10).
8. Mechanism according to claim 1, characterized in that the holder (8) is provided with two abutment elements (20) in order to limit the movements of the retaining elements (7) in a direction away from the electromagnet (10).
9. Mechanism according to claim 1, characterized by guiding means (6a, 6b) for the rods (1) to prevent rods from deflecting during the up and downwards movement of the rods (1).
EP83105925A 1982-07-01 1983-06-16 Shedding mechanism for looms Expired EP0098428B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4025/82 1982-07-01
CH4025/82A CH657162A5 (en) 1982-07-01 1982-07-01 TECHNICAL DEVICE FOR A WEAVING MACHINE.

Publications (3)

Publication Number Publication Date
EP0098428A2 EP0098428A2 (en) 1984-01-18
EP0098428A3 EP0098428A3 (en) 1984-12-12
EP0098428B1 true EP0098428B1 (en) 1987-08-26

Family

ID=4268414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83105925A Expired EP0098428B1 (en) 1982-07-01 1983-06-16 Shedding mechanism for looms

Country Status (6)

Country Link
US (1) US4515186A (en)
EP (1) EP0098428B1 (en)
JP (1) JPS5926543A (en)
CH (1) CH657162A5 (en)
DE (1) DE3373198D1 (en)
ES (1) ES8405453A1 (en)

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FR2587045B1 (en) * 1985-09-06 1987-10-23 Staubli Verdol DEVICE FOR FORMING A CROWD IN A WEAVING MATERIAL COMPRISING A TILTING RETAINING HOOK
JPS63249735A (en) * 1987-04-04 1988-10-17 有限会社　サイテツクス Apparatus for forming shuttle of loom
JPS6440630A (en) * 1987-04-14 1989-02-10 Scitex Corp Ltd Apparatus for forming shuttle of loom
JPS63264942A (en) * 1987-04-21 1988-11-01 有限会社　サイテツクス Shuttle forming apparatus
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Also Published As

Publication number Publication date
CH657162A5 (en) 1986-08-15
JPS5926543A (en) 1984-02-10
ES523720A0 (en) 1984-06-01
JPH0214450B2 (en) 1990-04-09
ES8405453A1 (en) 1984-06-01
DE3373198D1 (en) 1987-10-01
EP0098428A2 (en) 1984-01-18
US4515186A (en) 1985-05-07
EP0098428A3 (en) 1984-12-12

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