EP0598264B1 - Device to select and feed weft yarns for a loom - Google Patents

Device to select and feed weft yarns for a loom Download PDF

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Publication number
EP0598264B1
EP0598264B1 EP93117545A EP93117545A EP0598264B1 EP 0598264 B1 EP0598264 B1 EP 0598264B1 EP 93117545 A EP93117545 A EP 93117545A EP 93117545 A EP93117545 A EP 93117545A EP 0598264 B1 EP0598264 B1 EP 0598264B1
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EP
European Patent Office
Prior art keywords
accordance
feeder
drive
thread
drive motors
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Expired - Lifetime
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EP93117545A
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German (de)
French (fr)
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EP0598264A1 (en
Inventor
Geert Geerardyn
Bernard Vancayzeele
Dirk Lewyllie
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Picanol NV
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Picanol NV
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Priority to EP96119033A priority Critical patent/EP0763613B1/en
Publication of EP0598264A1 publication Critical patent/EP0598264A1/en
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    • 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
    • D03D47/38—Weft pattern mechanisms

Definitions

  • the invention relates to a device for selecting and delivering weft threads to an insertion member for a weaving machine with at least one rod-shaped feeder associated with a weft thread, which is guided in its longitudinal direction and which can be moved between a rest position and a delivery position by means of an eccentric drive and its own drive motor.
  • the rod-shaped or needle-shaped feeders are mounted in a longitudinally displaceable manner in two longitudinal guides. Between the longitudinal guides, a rocker acts on the feeder, the other end of which is stationary. Actuating rods engage approximately in the middle of these rockers, the other end of which is connected to an eccentric drive, to each of which a drive motor belongs, in particular a stepper motor.
  • the eccentric path of the eccentric drives is translated by means of the rockers, so that the feeders cover a distance between their rest position and their infeed position which corresponds approximately to twice the eccentric path.
  • thread feeders that can be moved alternately from the rest position to the infeed position are attached to a toothed belt.
  • the toothed belt runs around a deflection wheel and a drive wheel, which is driven by an electric motor in a reciprocating motion.
  • the thread feeder consists of a rod-shaped part which is guided in a linear manner in a linear guide and a flexible cable.
  • One end of the flexible cable is connected to the rod-shaped part of the thread feeder.
  • the other end of the flexible cable is attached to the circumference of a disk which can be driven by a drive motor.
  • the invention has for its object to design a device of the type mentioned so that it can work at high working frequencies.
  • the rod-shaped feeder is connected directly to the eccentric drive, which has an eccentric path corresponding at least to the path of the feeder between its rest position and its infeed position, and in that a guide is provided for the feeder which compensates for the transverse movements of the Eccentric arc-shaped movements allowed the rod-shaped feeder.
  • the device according to the invention has the advantage that only relatively small masses have to be moved to move the feeder or feeders between the rest position and the delivery position, so that a high working frequency for the feeder or feeders and thus high weaving speeds can be achieved.
  • the feeder or feeders can be moved in any sequence and at any time independently of other weaving machine parts. A balance between the reciprocating movement of the feeder and the deviating transverse movements of the eccentric drive is obtained in a simple manner without increasing the masses to be moved.
  • each feeder is designed as a module with its drive motor, its eccentric drive and its guide. This creates the possibility in a simple manner that the number of thread feeders can be adapted to the requirements for the production of a specific fabric by additional attachment or removal of modules. In addition, it is possible to easily replace a module as a whole in the event of a defect.
  • the feeders are arranged in a common plane.
  • the modules of adjacent feeders are arranged mirror-symmetrically with respect to the common plane of the feeders. This makes it possible to arrange a large number of feeders in a very compact design.
  • a single module (1) of a device for selecting and delivering weft threads is shown, which consist of a plurality of similar modules (1).
  • Each module (1) contains a thread feeder (3), the end of which is provided with an eye (21) in which a weft thread (30) is guided.
  • Each module (1) contains a drive motor (4) for the thread feeder (3).
  • the drive motor (4) is connected directly via an eccentric drive (6) to the thread guide (3) designed as a round rod or needle (11).
  • a crank (9) parallel to the thread feeder (3) is arranged in a rotationally fixed manner.
  • the crank (9) is provided with a crank pin (10) on which the end of the thread feeder (3) opposite the eye (21) is mounted.
  • the rod or needle (11) of the thread feeder (3) is guided in a guide (12) which has a longitudinal bore (13). This guide (12) is arranged as close as possible to the end of the thread feeder (3) which has the eye (21) and can be rotated about an axis (14) parallel to the shaft (5).
  • Each module (1) has as a supporting structure a plate (16), on the back of which the drive motor by means of only indicated Screws (22) is attached.
  • the plate (16) is provided with a recess (17) in the area of the eccentric drive (6).
  • the thread feeder (3) and its guide (12) are located on the side of the plate (16) opposite the drive motor (4).
  • the guide (12) is inserted with its axis (14) through the plate (16) and secured on the opposite side with a securing element, for example a clip (23).
  • the plate (16) has a trapezoidal base, tapering from the area of the drive motor (4) to the area of the guide (12).
  • the masses of the parts to be moved by the drive motor (4), namely the crank (9) and the thread feeder (3) and the guide (12) are relatively small, so that correspondingly low inertia forces for the adjustment of the thread feeder (3) have to be overcome are. This enables higher working speeds and / or the use of relatively low-power drive motors (4).
  • stops (25, 26) consist of projections (25, 26) of the recess (17) which limit the maximum angle of rotation of the crank (9) and thus also of the shaft (5) of the drive motor (4).
  • the projections (25, 26) are arranged such that in the rest position (Fig. 1) and in the infeed position (Fig. 3) the crank (9) and the rod or needle (11) of the thread feeder (3) are aligned with one another, ie the shaft (5) and the crank pin (10) run in a plane through the axis of the rod or needle (11).
  • adjustable stops are provided, for example in the form of set screws, which are attached to the plate (16) and which limit the angle of rotation of the crank (9).
  • the drive motors (4) of the individual modules (1) are connected to an electronic control unit (20) which determines when and how, i.e. at what speed the thread feeders (3) are moved from the rest position (FIG. 1) to the infeed position (FIG. 3) and possibly also to an intermediate position (FIG. 4).
  • the control unit (20) can bring the thread feeder (3) into the desired position at any time and regardless of the position of other weaving machine parts, such as the comb drawer drive, the shaft drive or other drives. This makes it possible to choose the movement of the thread feeder (3), for example depending on the type of weft thread, or to cancel a weft thread entry or to bring the thread feeder (3) into any position during a stop or during a weaving machine standstill.
  • the drive motors (4) are designed as stepper motors, to which the control unit (20) supplies a pulse sequence or number of pulses suitable for the desired movement.
  • This pulse sequence can be selected so that the crank (9) is pressed against the stop (25) in the rest position and against the stop (26) in the infeed position, so that two stable positions for the thread feeder (3) are obtained.
  • the pulse sequence is designed so that the crank (9) does not abut the stop (25 or 26) in the respective end positions. This is possible due to the number of steps with which the drive motor is rotated.
  • the thread feeder (3) can be held in an adjustable rest position or infeed position by applying a so-called holding current to the drive motor (4).
  • This holding current is chosen in such a way that the positioning of the thread feeder (3) is not influenced by vibrations of the weaving machine or by the forces of the weft thread exerted on it.
  • the crank (9) and the rod or needle (11) of the thread feeder (3) in the rest position and / or in the feed position are at least approximately aligned with one another, the forces exerted by a weft thread (30) on the thread feeder (3) are practically not transmitted to the crank (9), so that only a relatively low holding current is required.
  • the eccentric drive (6) always starts moving from the rest position, i.e. in the direction of arrow (P1) of Fig. 1, as well as from the infeed movement, i.e. Direction of arrow (Q) in Fig. 3, only a relatively small movement component in the longitudinal direction of the thread feeder (3), results in a relatively smooth start of the movement of the feeder (3), so that the weft thread (30) is spared and the danger is reduced by weft breaks.
  • the control unit (20) outputs the pulse sequence to the drive motor (4) at a variable frequency, so that a slow start of the drive motor (4) is obtained in each case.
  • the thread feeder (3) If the thread feeder (3) is in its rest position, it can be provided after a certain time or for example after a certain number of stops of the sley that the crank (9) is brought into contact with the stop (25) so that a reference position of the motor shaft (5) is determined for the control unit (20).
  • a reference position can also be obtained with the aid of a detector, for example with the aid of a proximity switch.
  • the shaft (5) of the drive motor (4) is provided with an angle detector which is connected to the control unit (20).
  • the control unit (20) can then drive the controllable drive motor (4), which in this case need not be a stepper motor, until it has reached the predetermined angular position.
  • the drive motor (4) can be supplied with a current of variable frequency by the control unit (20).
  • the thread feeder (3) deflects a weft thread (30) extending between a stationary thread guide, for example a stationary eye (33), and a shed (34) in such a way that it is outside the range of movement of an insertion element (31), in particular a gripper (32), as is shown schematically in FIG. 1.
  • the thread feeder (3) is adjusted in such a way that the weft thread (30) then runs in an area in which it is gripped by the insertion element (31), for example the gripper (32).
  • the thread feeder (3) can be returned to its rest position.
  • FIG. 1 In one embodiment of the invention, which is shown in FIG.
  • the thread feeder (3) is brought into an intermediate position during the weft insertion, in which the weft thread (30) in the area of the eye (21) of the thread feeder ( 3) is deflected as little as possible. This reduces the friction in the area of the thread eye (21), so that the risk of weft breakage is reduced. It can also be provided that the thread feeder (3) is shifted with a constant movement so that the friction in the thread eye (21) is as low as possible, whereby the thread feeder (3) can change its position for this purpose. This constant adjustment can also be achieved by appropriate design of the control unit (20). Moving to the intermediate position also has an advantage if the same weft thread is to be re-inserted during the subsequent weft insertion. In this case, the thread feeder (3) only has to travel a short distance to its delivery position.
  • each module (1) is assigned a switch (48) which is connected to the control unit (20).
  • the control unit (20) is given a signal, on the basis of which the control unit (20) brings the associated thread feeder (3) into the threading position by correspondingly turning the drive motor (4).
  • the control unit (20) supplies a corresponding holding current to the drive motor (4) for this threading position, if this is a stepper motor.
  • a device for selecting and delivering weft threads consists of a large number of modules, as shown in FIGS. 5 to 7.
  • modules (1A to 1E) are designed in accordance with the previously described embodiment, ie it has a drive motor (4A to 4E) and an eccentric drive for a thread feeder (3A to 3E), each in a guide (12A to 12E) a rod or needle (11A to 11E) is guided.
  • These elements are arranged on plates (16A to 16E), as was explained with reference to FIGS. 1 to 4.
  • the thread feeders (3A to 3E) lie in a common plane.
  • the modules (1A to 1E) are arranged in two rows (40, 41) mirror-inverted to one another and offset with respect to the common plane of the thread feeders (3A to 3E).
  • the common plane can be flat or also spatially curved (arched).
  • Their plates (16A to 16E) are arranged between two holding plates (42, 43), to which they are attached with screws (46). These plates (42, 43) are connected to one another by transverse webs (44) (FIG. 6).
  • the plate (43) is held on the machine frame (45) by means of screws (47).
  • the thread feeders (3A to 3E) describe an arcuate movement (27) between their rest position and their infeed position, as is shown in FIG. 7.
  • the arcuate movements (27) of all thread feeders (3A to 3E) run parallel to one another.
  • the direction of rotation of the drive motors (4C, 4E) arranged on one side is opposite to the direction of rotation of the drive motors (4A, 4B, 4D) arranged on the other side.
  • the cutouts (17A, 17B, 17D) are also mirror-symmetrical to the opposite cutouts (17C and 17E).
  • the same plates (16) can of course be used, only the arrangement of the drive motors (4) and the longitudinal guides (12) on the base surfaces of the plates (16) being exchanged.
  • the individual modules (1A to 1C) attached to the plates (42, 43) can be attached to the plates (42, 43) individually in different positions relative to one another. It is also possible to align the plates (42, 43) with respect to the machine frame (45) and to fasten them to the machine frame (45) in a common aligned position. Since the device consists of a large number of individual modules, it is possible to enlarge or reduce the device quickly and easily by additional or fewer modules (1) according to the application. In addition, a single module can be easily replaced as a whole in the event of a defect. Since the drive motors (4) are also on the outside in the opposite arrangement (FIG. 5) are arranged, they are easily accessible and therefore also easily replaceable in the event of a defect.
  • the thread feeders (3A to 3E) are in the feed position in adjacent positions. It is of course possible to align the individual modules in such a way that all thread feeders (3A to 3E) assume an infeed position that is essentially on the same axis or even at the same point.
  • a suitable control of the drive motors (4) also has the advantage that the rest position of the thread feeder (3) can be changed without mechanical adjustments having to be made.
  • a corresponding setting can be made via the control unit (20), which is provided with an input unit, for example.
  • the thread feeders (3) are provided with thread eyes (21). In another embodiment it is provided that the thread feeders (3) are provided with thread clamps, as is also known from the prior art.
  • the guides (12) of the thread feeder (3) are held with rubber-elastic bearings, so that the axis (14) is omitted.
  • the thread feeders (3) are elastically supported in the transverse direction.
  • the thread feeder (3) it is possible to move the thread feeder (3) in a straight line movement between the rest position and the infeed position if it is provided by other means that the transverse movement of the eccentric drive with respect to the reciprocating movement of the thread feeder (3) is compensated for .
  • This can happen, for example, in that the thread feeder (3) consists of two parts which are connected to one another via a joint which has an axis of rotation parallel to the motor shaft (5).

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

Description

Die Erfindung betrifft eine Vorrichtung zum Auswählen und Zustellen von Schußfäden zu einem Eintrageorgan für eine Webmaschine mit mindestens einem einem Schußfaden zugeordneten stangenförmigen Zubringer, der in seiner Längsrichtung geführt ist und der mittels eines Exzenterantriebes und eines eigenen Antriebsmotors zwischen einer Ruheposition und einer Zustellposition bewegbar ist.The invention relates to a device for selecting and delivering weft threads to an insertion member for a weaving machine with at least one rod-shaped feeder associated with a weft thread, which is guided in its longitudinal direction and which can be moved between a rest position and a delivery position by means of an eccentric drive and its own drive motor.

Bei einer bekannten Vorrichtung der eingangs genannten Art (EP 0 362 089 A1) sind die stangenförmigen oder nadelförmigen Zubringer längsverschieblich in zwei Längsführungen gelagert. Zwischen den Längsführungen greift an die Zubringer jeweils eine Wippe an, deren anderes Ende stationär gelagert ist. Etwa mittig an diese Wippen greifen Betätigungsstangen an, deren anderes Ende jeweils an einen Exzenterantrieb angeschlossen ist, zu welchem jeweils ein Antriebsmotor gehört, insbesondere ein Schrittmotor. Mittels der Wippen wird der Exzenterweg der Exzenterantriebe übersetzt, so daß die Zubringer zwischen ihrer Ruheposition und ihrer Zustellposition einen Weg zurücklegen, der etwa dem Doppelten des Exzenterweges entspricht.In a known device of the type mentioned at the beginning (EP 0 362 089 A1), the rod-shaped or needle-shaped feeders are mounted in a longitudinally displaceable manner in two longitudinal guides. Between the longitudinal guides, a rocker acts on the feeder, the other end of which is stationary. Actuating rods engage approximately in the middle of these rockers, the other end of which is connected to an eccentric drive, to each of which a drive motor belongs, in particular a stepper motor. The eccentric path of the eccentric drives is translated by means of the rockers, so that the feeders cover a distance between their rest position and their infeed position which corresponds approximately to twice the eccentric path.

Bei einer anderen Bauart (EP 0 478 986 A1) sind an einem Zahnriemen wechselseitig von der Ruheposition in die Zustellposition bewegbare Fadenzubringer befestigt. Der Zahnriemen läuft um ein Umlenkrad und ein Antriebsrad, das von einem Elektromotor zu einer hin- und hergehenden Bewegung angetrieben wird.In another design (EP 0 478 986 A1), thread feeders that can be moved alternately from the rest position to the infeed position are attached to a toothed belt. The toothed belt runs around a deflection wheel and a drive wheel, which is driven by an electric motor in a reciprocating motion.

Bei einer anderen bekannten Bauart (Ep-A 0 461 524) besteht der Fadenzubringer aus einem stangenförmigen Teil, der in einer Linearführung geradlinig geführt ist, und einem flexiblen Kabel. Ein Ende des flexiblen Kabels ist mit dem stangenförmigen Teil des Fadenzubringers verbunden. Das andere Ende des flexiblen Kabels ist an dem Umfang einer mittels eines Antriebsmotors antreibbaren Scheibe befestigt.In another known type (Ep-A 0 461 524) the thread feeder consists of a rod-shaped part which is guided in a linear manner in a linear guide and a flexible cable. One end of the flexible cable is connected to the rod-shaped part of the thread feeder. The other end of the flexible cable is attached to the circumference of a disk which can be driven by a drive motor.

Darüber hinaus sind Vorrichtungen zum Auswählen und Zustellen von Schußfäden zu einem Eintrageorgan für eine Webmaschine bekannt (US 49 64 443, 47 81 226), bei welchen Zubringer über Ubertragungsmittel von dem zentralen Webmaschinenantrieb angetrieben werden.In addition, devices for selecting and delivering weft threads to an insertion member for a weaving machine are known (US Pat. No. 4,964,443, 4,781,226), in which feeders are driven by the central weaving machine drive via transmission means.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art so auszubilden, daß sie mit hohen Arbeitsfrequenzen arbeiten kann.The invention has for its object to design a device of the type mentioned so that it can work at high working frequencies.

Diese Aufgabe wird dadurch gelöst, daß der stangenförmige Zubringer unmittelbar an den Exzenterantrieb angeschlossen ist, der einen wenigstens dem Weg des Zubringers zwischen seiner Ruheposition und seiner Zustellposition entsprechenden Exzenterweg aufweist, und daß für den Zubringer eine Führung vorgesehen ist, die zum Ausgleichen der Querbewegungen des Exzenterantriebs bogenförmige Bewegungen dem stangenförmigen Zubringer gestattet.This object is achieved in that the rod-shaped feeder is connected directly to the eccentric drive, which has an eccentric path corresponding at least to the path of the feeder between its rest position and its infeed position, and in that a guide is provided for the feeder which compensates for the transverse movements of the Eccentric arc-shaped movements allowed the rod-shaped feeder.

Die erfindungsgemäße Vorrichtung hat den Vorteil, daß nur relativ geringe Massen zum Bewegen des oder der Zubringer zwischen der Ruheposition und der Zustellposition bewegt werden müssen, so daß eine hohe Arbeitsfrequenz für den oder die Zubringer und damit hohe Webgeschindigkeiten erzielt werden können. Darüber hinaus besteht der Vorteil, daß der oder die Zubringer in beliebiger Folge und zu beliebigen Zeiten unabhängig von anderen Webmaschinenteilen bewegt werden können. Dabei wird in einfacher Weise ein Ausgleich zwischen der hin- und hergehenden Bewegung der Zubringer und den davon abweichenden Querbewegungen des Exzenterantriebs erhalten, ohne daß die zu bewegenden Massen erhöht werden.The device according to the invention has the advantage that only relatively small masses have to be moved to move the feeder or feeders between the rest position and the delivery position, so that a high working frequency for the feeder or feeders and thus high weaving speeds can be achieved. In addition, there is the advantage that the feeder or feeders can be moved in any sequence and at any time independently of other weaving machine parts. A balance between the reciprocating movement of the feeder and the deviating transverse movements of the eccentric drive is obtained in a simple manner without increasing the masses to be moved.

Bei einer besonders vorteilhaften Ausgestaltung der Erfindung wird vorgesehen, daß jeder Zubringer mit seinem Antriebsmotor, seinem Exzenterantrieb und seiner Führung als ein Modul ausgebildet ist. Dadurch wird in einfacher Weise die Möglichkeit geschaffen, daß durch zusätzliches Anbringen oder Entfernen von Moduln die Anzahl der Fadenzubringer an den Bedarf bei dem Herstellen eines bestimmten Gewebes angepaßt werden kann. Darüber hinaus ist es möglich, bei einem Defekt in einfacher Weise einen Modul als Ganzes auszutauschen.In a particularly advantageous embodiment of the invention, it is provided that each feeder is designed as a module with its drive motor, its eccentric drive and its guide. This creates the possibility in a simple manner that the number of thread feeders can be adapted to the requirements for the production of a specific fabric by additional attachment or removal of modules. In addition, it is possible to easily replace a module as a whole in the event of a defect.

In weiterer Ausgestaltung der Erfindung wird vorgesehen, daß die Zubringer in einer gemeinsamen Ebene angeordnet sind. In besonders vorteilhafter Ausgestaltung wird dabei weiter vorgesehen, daß die Moduln benachbarter Zubringer spiegelsymmetrisch bezüglich der gemeinsamen Ebene der Zubringer angeordnet sind. Dadurch wird es möglich, eine Vielzahl von Zubringern in sehr kompakter Bauweise anzuordnen.In a further embodiment of the invention it is provided that the feeders are arranged in a common plane. In a particularly advantageous embodiment, it is further provided that the modules of adjacent feeders are arranged mirror-symmetrically with respect to the common plane of the feeders. This makes it possible to arrange a large number of feeders in a very compact design.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung der in der Zeichnung dargestellten Ausführungsbeispiele.

Fig. 1
zeigt eine Ansicht einer schematisch dargestellten erfindungsgemäßen Vorrichtung,
Fig. 2
eine Ansicht der Vorrichtung in Richtung des Pfeiles F2 der Fig. 1,
Fig. 3 und 4
Ansichten entsprechend Fig. 1 mit anderen Positionen des Zubringers,
Fig. 5
eine teilweise geschnittene Ansicht ähnlich Fig. 2 einer spiegelsymmetrischen Anordnung von Moduln einer erfindungsgemäßen Vorrichtung,
Fig. 6
einen Schnitt entlang der Linie VI-VI der Fig. 5 und
Fig. 7
die Einzelheit F7 der Fig. 6 in größerem Maßstab.
Further features and advantages of the invention result from the following description of the exemplary embodiments shown in the drawing.
Fig. 1
shows a view of a schematically illustrated device according to the invention,
Fig. 2
2 shows a view of the device in the direction of arrow F2 in FIG. 1,
3 and 4
1 with other positions of the feeder,
Fig. 5
2 shows a mirror-symmetrical arrangement of modules of a device according to the invention,
Fig. 6
a section along the line VI-VI of Fig. 5 and
Fig. 7
the detail F7 of Fig. 6 on a larger scale.

In Fig. 1 bis 4 ist ein einzelner Modul (1) einer Vorrichtung zum Auswählen und Zustellen von Schußfäden dargestellt, die aus einer Vielzahl gleichartiger Moduln (1) bestehen. Jeder Modul (1) enthält einen Fadenzubringer (3), dessen Ende mit einem Auge (21) versehen ist, in welchem ein Schußfaden (30) geführt ist.1 to 4, a single module (1) of a device for selecting and delivering weft threads is shown, which consist of a plurality of similar modules (1). Each module (1) contains a thread feeder (3), the end of which is provided with an eye (21) in which a weft thread (30) is guided.

Jeder Modul (1) enthält einen Antriebsmotor (4) für den Fadenzubringer (3). Der Antriebsmotor (4) ist direkt über einen Exzenterantrieb (6) mit dem als runde Stange oder Nadel (11) ausgebildeten Fadenführer (3) verbunden. Auf der Welle (5) des Antriebsmotors (4), die quer zur Längsachse des Fadenzubringers (3) ausgerichtet ist, ist eine zu dem Fadenzubringer (3) parallele Kurbel (9) drehfest angeordnet. Die Kurbel (9) ist mit einem Kurbelzapfen (10) versehen, auf welchem das dem Auge (21) gegenüberliegende Ende des Fadenzubringers (3) gelagert ist. Die Stange oder Nadel (11) des Fadenzubringers (3) ist in einer Führung (12) geführt, die eine Längsbohrung (13) aufweist. Diese Führung (12) ist möglichst nahe zu dem das Auge (21) aufweisenden Ende des Fadenzubringers (3) angeordnet und um eine zur Welle (5) parallele Achse (14) drehbar.Each module (1) contains a drive motor (4) for the thread feeder (3). The drive motor (4) is connected directly via an eccentric drive (6) to the thread guide (3) designed as a round rod or needle (11). On the shaft (5) of the drive motor (4), which is oriented transversely to the longitudinal axis of the thread feeder (3), a crank (9) parallel to the thread feeder (3) is arranged in a rotationally fixed manner. The crank (9) is provided with a crank pin (10) on which the end of the thread feeder (3) opposite the eye (21) is mounted. The rod or needle (11) of the thread feeder (3) is guided in a guide (12) which has a longitudinal bore (13). This guide (12) is arranged as close as possible to the end of the thread feeder (3) which has the eye (21) and can be rotated about an axis (14) parallel to the shaft (5).

Jeder Modul (1) besitzt als Tragkonstruktion eine Platte (16), auf deren Rückseite der Antriebsmotor mittels nur angedeuteten Schrauben (22) befestigt ist. Die Platte (16) ist im Bereich des Exzenterantriebs (6) mit einer Aussparung (17) versehen. Der Fadenzubringer (3) und seine Führung (12) befinden sich auf der dem Antriebsmotor (4) gegenüberliegenden Seite der Platte (16). Die Führung (12) ist mit ihrer Achse (14) durch die Platte (16) hindurchgesteckt und auf der gegenüberliegenden Seite mit einem Sicherungselement gesichert, beispielsweise einem Klips (23). Wie aus Fig. 1, 3 und 4 zu ersehen ist, besitzt die Platte (16) eine trapezförmige Grundfläche, wobei sie sich von dem Bereich des Antriebsmotors (4) zu dem Bereich der Führung (12) hin verjüngt.Each module (1) has as a supporting structure a plate (16), on the back of which the drive motor by means of only indicated Screws (22) is attached. The plate (16) is provided with a recess (17) in the area of the eccentric drive (6). The thread feeder (3) and its guide (12) are located on the side of the plate (16) opposite the drive motor (4). The guide (12) is inserted with its axis (14) through the plate (16) and secured on the opposite side with a securing element, for example a clip (23). 1, 3 and 4, the plate (16) has a trapezoidal base, tapering from the area of the drive motor (4) to the area of the guide (12).

Die Massen der von dem Antriebsmotor (4) zu bewegenden Teile, nämlich die Kurbel (9) und der Fadenzubringer (3) und die Führung (12) sind relativ gering, so daß entsprechend geringe Massenträgheitskräfte für das Verstellen des Fadenzubringers (3) zu überwinden sind. Dadurch werden höhere Arbeitsgeschwindigkeiten und/oder der Einsatz relativ leistungsarmer Antriebsmotoren (4) möglich.The masses of the parts to be moved by the drive motor (4), namely the crank (9) and the thread feeder (3) and the guide (12) are relatively small, so that correspondingly low inertia forces for the adjustment of the thread feeder (3) have to be overcome are. This enables higher working speeds and / or the use of relatively low-power drive motors (4).

Der maximale Drehwinkel der Motorwelle ist mittels Anschlägen (25, 26) begrenzt. Diese Anschläge bestehen bei dem dargestellten Ausführungsbeispiel aus Vorsprüngen (25, 26) der Aussparung (17), die den maximalen Drehwinkel der Kurbel (9) und damit auch der Welle (5) des Antriebsmotors (4) begrenzen. Die Vorsprünge (25, 26) sind derart angeordnet, daß in der Ruheposition (Fig. 1) und in der Zustellposition (Fig. 3) die Kurbel (9) und die Stange oder Nadel (11) des Fadenzubringers (3) miteinander fluchten, d.h. die Welle (5) und der Kurbelzapfen (10) in einer durch die Achse der Stange oder Nadel (11) gelegten Ebene verlaufen.The maximum angle of rotation of the motor shaft is limited by stops (25, 26). In the exemplary embodiment shown, these stops consist of projections (25, 26) of the recess (17) which limit the maximum angle of rotation of the crank (9) and thus also of the shaft (5) of the drive motor (4). The projections (25, 26) are arranged such that in the rest position (Fig. 1) and in the infeed position (Fig. 3) the crank (9) and the rod or needle (11) of the thread feeder (3) are aligned with one another, ie the shaft (5) and the crank pin (10) run in a plane through the axis of the rod or needle (11).

Bei einer abgewandelten Ausführungsform werden einstellbare Anschläge vorgesehen, beispielsweise in der Form von Stellschrauben, die an der Platte (16) angebracht werden und die den Drehwinkel der Kurbel (9) begrenzen.In a modified embodiment, adjustable stops are provided, for example in the form of set screws, which are attached to the plate (16) and which limit the angle of rotation of the crank (9).

Die Antriebsmotoren (4) der einzelnen Moduln (1) sind an eine elektronische Steuereinheit (20) angeschlossen, die bestimmt, wann und wie, d.h. mit welcher Geschwindigkeit, die Fadenzubringer (3) aus der Ruheposition (Fig. 1) zu der Zustellposition (Fig. 3) und gegebenenfalls noch zu einer Zwischenposition (Fig. 4) bewegt werden. Die Steuereinheit (20) kann den Fadenzubringer (3) jederzeit und unabhängig von der Position anderer Webmaschinenteile, wie beispielsweise des Kammladenantriebs, des Schaftantriebs oder anderer Antriebe, in die gewünschte Position bringen. Dadurch ist es möglich, die Bewegung des Fadenzubringers (3) beispielsweise abhängig von der Art des Schußfadens zu wählen, oder einen Schußfadeneintrag zu annullieren oder den Fadenzubringer (3) während eines Anschlages oder während eines Webmaschinenstillstandes in eine beliebige Position zu bringen.The drive motors (4) of the individual modules (1) are connected to an electronic control unit (20) which determines when and how, i.e. at what speed the thread feeders (3) are moved from the rest position (FIG. 1) to the infeed position (FIG. 3) and possibly also to an intermediate position (FIG. 4). The control unit (20) can bring the thread feeder (3) into the desired position at any time and regardless of the position of other weaving machine parts, such as the comb drawer drive, the shaft drive or other drives. This makes it possible to choose the movement of the thread feeder (3), for example depending on the type of weft thread, or to cancel a weft thread entry or to bring the thread feeder (3) into any position during a stop or during a weaving machine standstill.

Bei einer bevorzugten Ausführungsform wird vorgesehen, daß die Antriebsmotoren (4) als Schrittmotoren ausgebildet werden, denen von der Steuereinheit (20) eine für die gewünschte Bewegung geeignete Impulssequenz oder Impulsanzahl geliefert wird. Diese Impulssequenz kann so gewählt werden, daß die Kurbel (9) in der Ruheposition an den Anschlag (25) und in der Zustellposition an den Anschlag (26) gedrückt wird, so daß zwei stabile Positionen für den Fadenzubringer (3) erhalten werden. Bevorzugt wird jedoch vorgesehen, daß die Impulssequenz so ausgelegt wird, daß die Kurbel (9) in den jeweiligen Endpositionen nicht an dem Anschlag (25 oder 26) anliegt. Dies ist durch die Anzahl der Schritte möglich, mit denen der Antriebsmotor gedreht wird. Der Fadenzubringer (3) kann in einer einstellbaren Ruheposition oder Zustellposition gehalten werden, indem an den Antriebsmotor (4) ein sogenannter Haltestrom angelegt wird. Dieser Haltestrom wird in einem solchen Sinne gewählt, daß die Positionierung des Fadenzubringers (3) nicht von Schwingungen der Webmaschine oder von auf ihn ausgeübten Kräften des Schußfadens beeinflußt wird. Wenn die Kurbel (9) und die Stange oder Nadel (11) des Fadenzubringers (3) in der Ruheposition und/oder in der Zustellposition wenigstens annähernd miteinander fluchten, werden die von einem Schußfaden (30) auf den Fadenzubringer (3) ausgeübten Kräfte praktisch nicht auf die Kurbel (9) übertragen, so daß nur ein relativ geringer Haltestrom erforderlich ist.In a preferred embodiment it is provided that the drive motors (4) are designed as stepper motors, to which the control unit (20) supplies a pulse sequence or number of pulses suitable for the desired movement. This pulse sequence can be selected so that the crank (9) is pressed against the stop (25) in the rest position and against the stop (26) in the infeed position, so that two stable positions for the thread feeder (3) are obtained. However, it is preferably provided that the pulse sequence is designed so that the crank (9) does not abut the stop (25 or 26) in the respective end positions. This is possible due to the number of steps with which the drive motor is rotated. The thread feeder (3) can be held in an adjustable rest position or infeed position by applying a so-called holding current to the drive motor (4). This holding current is chosen in such a way that the positioning of the thread feeder (3) is not influenced by vibrations of the weaving machine or by the forces of the weft thread exerted on it. When the crank (9) and the rod or needle (11) of the thread feeder (3) in the rest position and / or in the feed position are at least approximately aligned with one another, the forces exerted by a weft thread (30) on the thread feeder (3) are practically not transmitted to the crank (9), so that only a relatively low holding current is required.

Da der Exzenterantrieb (6) jeweils zu Beginn seiner Bewegung aus der Ruheposition, d.h. in Pfeilrichtung (P1) der Fig. 1, sowie aus der Zustellbewegung, d.h. Pfeilrichtung (Q) in Fig. 3, nur eine relativ geringe Bewegungskomponente in Längsrichtung des Fadenzubringers (3) ausübt, ergibt sich jeweils ein relativ sanfter Start der Bewegung des Zubringers (3), so daß der Schußfaden (30) geschont wird und die Gefahr von Schußfadenbrüchen verringert wird. Um diesen Effekt zu verstärken, kann vorgesehen werden, daß die Steuereinheit (20) die Impulssequenz mit einer variablen Frequenz an den Antriebsmotor (4) abgibt, so daß jeweils ein langsamer Anlauf des Antriebsmotors (4) erhalten wird.Since the eccentric drive (6) always starts moving from the rest position, i.e. in the direction of arrow (P1) of Fig. 1, as well as from the infeed movement, i.e. Direction of arrow (Q) in Fig. 3, only a relatively small movement component in the longitudinal direction of the thread feeder (3), results in a relatively smooth start of the movement of the feeder (3), so that the weft thread (30) is spared and the danger is reduced by weft breaks. In order to intensify this effect, it can be provided that the control unit (20) outputs the pulse sequence to the drive motor (4) at a variable frequency, so that a slow start of the drive motor (4) is obtained in each case.

Wenn sich der Fadenzubringer (3) in seiner Ruheposition befindet, so kann nach einer bestimmten Zeit oder beispielsweise nach einer bestimmten Anzahl von Anschlägen der Weblade vorgesehen werden, daß die Kurbel (9) mit dem Anschlag (25) zur Anlage gebracht wird, so daß für die Steuereinheit (20) eine Referenzposition der Motorwelle (5) bestimmt wird. Eine derartige Referenzposition kann aber auch mit Hilfe eines Detektors erhalten werden, beispielsweise mit Hilfe eines Näherungsschalters.If the thread feeder (3) is in its rest position, it can be provided after a certain time or for example after a certain number of stops of the sley that the crank (9) is brought into contact with the stop (25) so that a reference position of the motor shaft (5) is determined for the control unit (20). However, such a reference position can also be obtained with the aid of a detector, for example with the aid of a proximity switch.

Bei einer anderen Ausführungsform wird vorgesehen, daß die Welle (5) des Antriebsmotors (4) mit einem Winkeldetektor versehen ist, der an die Steuereinheit (20) angeschlossen ist. Die Steuereinheit (20) kann dann den steuerbaren Antriebsmotor (4), der in diesem Falle kein Schrittmotor zu sein braucht, antreiben, bis er die vorgegebene Winkelposition erreicht hat. Auch in diesem Fall ist es möglich, den Antriebsmotor (4) mit einer variablen Drehgeschwindigkeit derart anzutreiben, daß jeweils das Anlaufen mit einer reduzierten Geschwindigkeit geschieht. Hierbei kann der Antriebsmotor (4) von der Steuereinheit (20) mit einem Strom mit variabler Frequenz versorgt werden.In another embodiment it is provided that the shaft (5) of the drive motor (4) is provided with an angle detector which is connected to the control unit (20). The control unit (20) can then drive the controllable drive motor (4), which in this case need not be a stepper motor, until it has reached the predetermined angular position. In this case too, it is possible to use a drive motor (4) to drive the variable rotational speed in such a way that the start-up occurs at a reduced speed. The drive motor (4) can be supplied with a current of variable frequency by the control unit (20).

In der Ruheposition (Fig. 1) lenkt der Fadenzubringer (3) einen sich zwischen einem stationären Fadenführer, beispielsweise einem stationären Auge (33), und einem Webfach (34) verlaufenden Schußfaden (30) derart aus, daß er außerhalb des Bewegungsbereiches eines Eintrageorgans (31) liegt, insbesondere eines Greifers (32), wie dies schematisch in Fig. 1 dargestellt ist. In der Zustellposition (Fig. 3) ist der Fadenzubringer (3) derart verstellt, daß der Schußfaden (30) dann in einem Bereich verläuft, in welchem er von dem Eintrageorgan (31) ergriffen wird, beispielsweise dem Greifer (32). Nachdem der Schußfaden (30) von dem Eintrageorgan (31) ergriffen worden ist, kann der Fadenzubringer (3) in seine Ruheposition zurückgeführt werden. Bei einer Ausgestaltung der Erfindung, die in Fig. 4 dargestellt ist, wird jedoch vorgesehen, daß der Fadenzubringer (3) während des Schußeintrages in eine Zwischenposition gebracht wird, in welcher der Schußfaden (30) im Bereich des Auges (21) des Fadenzubringers (3) möglichst wenig umgelenkt wird. Dadurch wird im Bereich des Fadenauges (21) die Reibung verringert, so daß die Gefahr von Schußfadenbrüchen verringert wird. Dabei kann auch vorgesehen werden, daß der Fadenzubringer (3) mit einer stetigen Bewegung so verlagert wird, daß die Reibung in dem Fadenauge (21) möglichst gering ist, wobei der Fadenzubringer (3) zu diesem Zweck seine Position verändern kann. Auch diese stetige Verstellung ist durch eine entsprechende Auslegung der Steuereinheit (20) realisierbar. Das Anfahren der Zwischenposition hat auch dann einen Vorteil, wenn beim nachfolgenden Schußeintrag der gleiche Schußfaden wieder eingetragen werden soll. In diesem Fall braucht der Fadenzubringer (3) nur einen verkürzten Weg bis zu seiner Zustellposition zurückzulegen.In the rest position (Fig. 1), the thread feeder (3) deflects a weft thread (30) extending between a stationary thread guide, for example a stationary eye (33), and a shed (34) in such a way that it is outside the range of movement of an insertion element (31), in particular a gripper (32), as is shown schematically in FIG. 1. In the infeed position (FIG. 3), the thread feeder (3) is adjusted in such a way that the weft thread (30) then runs in an area in which it is gripped by the insertion element (31), for example the gripper (32). After the weft thread (30) has been gripped by the insertion member (31), the thread feeder (3) can be returned to its rest position. In one embodiment of the invention, which is shown in FIG. 4, it is provided that the thread feeder (3) is brought into an intermediate position during the weft insertion, in which the weft thread (30) in the area of the eye (21) of the thread feeder ( 3) is deflected as little as possible. This reduces the friction in the area of the thread eye (21), so that the risk of weft breakage is reduced. It can also be provided that the thread feeder (3) is shifted with a constant movement so that the friction in the thread eye (21) is as low as possible, whereby the thread feeder (3) can change its position for this purpose. This constant adjustment can also be achieved by appropriate design of the control unit (20). Moving to the intermediate position also has an advantage if the same weft thread is to be re-inserted during the subsequent weft insertion. In this case, the thread feeder (3) only has to travel a short distance to its delivery position.

Im Falle eines Schußfadenbruches ist es zweckmäßig, den Fadenzubringer (3) in eine Position zu fahren, in der ein Einfädeln eines Schußfadens vereinfacht ist. Hierzu wird vorgesehen, daß jedem Modul (1) ein Schalter (48) zugeordnet ist, der mit der Steuereinheit (20) verbunden ist. Durch Betätigen des Schalters (48) wird der Steuereinheit (20) ein Signal gegeben, aufgrund dessen die Steuereinheit (20) den zugehörigen Fadenzubringer (3) durch entsprechendes Verdrehen des Antriebsmotors (4) in die Einfädelposition bringt. Die Steuereinheit (20) liefert für diese Einfädelposition einen entsprechenden Haltestrom an den Antriebsmotor (4), falls dieser ein Schrittmotor ist. Mittels eines nochmaligen Betätigens des Schalters (48) des betreffenden Fadenzubringers (3) wird dieser in seine ursprüngliche Position gebracht.In the event of a weft break, it is expedient to move the thread feeder (3) into a position in which threading a weft thread is simplified. For this purpose, it is provided that each module (1) is assigned a switch (48) which is connected to the control unit (20). By actuating the switch (48), the control unit (20) is given a signal, on the basis of which the control unit (20) brings the associated thread feeder (3) into the threading position by correspondingly turning the drive motor (4). The control unit (20) supplies a corresponding holding current to the drive motor (4) for this threading position, if this is a stepper motor. By pressing the switch (48) of the thread feeder (3) in question again, this is brought into its original position.

Wie bereits schon erwähnt wurde, besteht eine Vorrichtung zum Auswählen und Zustellen von Schußfäden aus einer Vielzahl von Moduln, wie dies in Fig. 5 bis 7 dargestellt ist. Aus Gründen der Übersichtlichkeit werden nur fünf derartiger Moduln (1A bis 1E) dargestellt, wobei natürlich in der Praxis eine wesentlich größere Zahl an Moduln vorgesehen werden kann. Jeder einzelne dieser Moduln (1A bis 1E) ist entsprechend dem vorausgehend beschriebenen Ausführungsbeispiel ausgebildet, d.h. er besitzt einen Antriebsmotor (4A bis 4E) sowie einen Exzenterantrieb für einen Fadenzubringer (3A bis 3E), der jeweils in einer Führung (12A bis 12E) mittels einer Stange oder Nadel (11A bis 11E) geführt ist. Diese Elemente sind auf Platten (16A bis 16E) angeordnet, wie dies anhand von Fig. 1 bis 4 erläutert wurde. Die Fadenzubringer (3A bis 3E) liegen in einer gemeinsamen Ebene. Um die einzelnen Fadenzubringer (3A bis 3E) möglichst dicht nebeneinander anordnen zu können, werden die Moduln (1A bis 1E) in zwei Reihen (40, 41) bezüglich der gemeinsamen Ebene der Fadenzubringer (3A bis 3E) spiegelbildlich zueinander und versetzt zueinander angeordnet. Die gemeinsame Ebene kann flach oder aber auch räumlich gekrümmt (gewölbt) sein. Ihre Platten (16A bis 16E) sind zwischen zwei Halteplatten (42, 43) angeordnet, an welchen sie mit Schrauben (46) befestigt sind. Diese Platten (42, 43) sind durch Querstege (44) miteinander verbunden (Fig. 6). Die Platte (43) ist mittels Schrauben (47) am Maschinengestell (45) gehalten.As already mentioned, a device for selecting and delivering weft threads consists of a large number of modules, as shown in FIGS. 5 to 7. For reasons of clarity, only five such modules (1A to 1E) are shown, although of course a much larger number of modules can be provided in practice. Each of these modules (1A to 1E) is designed in accordance with the previously described embodiment, ie it has a drive motor (4A to 4E) and an eccentric drive for a thread feeder (3A to 3E), each in a guide (12A to 12E) a rod or needle (11A to 11E) is guided. These elements are arranged on plates (16A to 16E), as was explained with reference to FIGS. 1 to 4. The thread feeders (3A to 3E) lie in a common plane. In order to be able to arrange the individual thread feeders (3A to 3E) as close as possible to one another, the modules (1A to 1E) are arranged in two rows (40, 41) mirror-inverted to one another and offset with respect to the common plane of the thread feeders (3A to 3E). The common plane can be flat or also spatially curved (arched). Their plates (16A to 16E) are arranged between two holding plates (42, 43), to which they are attached with screws (46). These plates (42, 43) are connected to one another by transverse webs (44) (FIG. 6). The plate (43) is held on the machine frame (45) by means of screws (47).

Bei dem Ausführungsbeispiel beschreiben die Fadenzubringer (3A bis 3E) zwischen ihrer Ruheposition und ihrer Zustellposition eine bogenförmige Bewegung (27), wie dies in Fig. 7 dargestellt ist. Um sicherzustellen, daß die Fadenzubringer (3A bis 3E) sich trotz ihrer dichten Aufeinanderfolge nicht gegenseitig behindern, wird vorgesehen, daß die bogenförmigen Bewegungen (27) aller Fadenzubringer (3A bis 3E) parallel zueinander verlaufen. Hierzu wird vorgesehen, daß der Drehsinn der auf einer Seite angeordneten Antriebsmotore (4C, 4E) gegensinnig zu dem Drehsinn der auf der anderen Seite angeordneten Antriebsmotoren (4A, 4B, 4D) ist. Entspechend sind auch die Aussparungen (17A, 17B, 17D) spiegelsymmetrisch zu den gegenüberliegenden Aussparungen (17C und 17E) gestaltet. Dabei können natürlich die gleichen Platten (16) eingesetzt werden, wobei dann lediglich die Anordnung der Antriebsmotoren (4) und der Längsführungen (12) auf den Grundflächen der Platten (16) vertauscht wird.In the exemplary embodiment, the thread feeders (3A to 3E) describe an arcuate movement (27) between their rest position and their infeed position, as is shown in FIG. 7. In order to ensure that the thread feeders (3A to 3E) do not interfere with one another despite their dense succession, it is provided that the arcuate movements (27) of all thread feeders (3A to 3E) run parallel to one another. For this purpose, it is provided that the direction of rotation of the drive motors (4C, 4E) arranged on one side is opposite to the direction of rotation of the drive motors (4A, 4B, 4D) arranged on the other side. Correspondingly, the cutouts (17A, 17B, 17D) are also mirror-symmetrical to the opposite cutouts (17C and 17E). The same plates (16) can of course be used, only the arrangement of the drive motors (4) and the longitudinal guides (12) on the base surfaces of the plates (16) being exchanged.

Die an den Platten (42, 43) befestigten einzelnen Moduln (1A bis 1C) können an den Platten (42, 43) individuell in zueinander verschiedene Positionen ausgerichtet befestigt werden. Ebenso ist es möglich, die Platten (42, 43) bezüglich des Maschinenrahmens (45) auzurichten und in einer gemeinsamen ausgerichteten Position an dem Maschinenrahmen (45) zu befestigen. Da die Vorrichtung aus einer Vielzahl einzelner Moduln besteht, ist es möglich, die Vorrichtung schnell und einfach durch zusätzliche oder auch durch weniger Moduln (1) entsprechend dem Anwendungsfall zu vergrößern oder zu verkleinern. Darüber hinaus kann ein einzelner Modul bei einem Defekt leicht insgesamt ausgetauscht werden. Da die Antriebsmotoren (4) auch bei der gegenüberliegenden Anordnung (Fig. 5) auf der Außenseite angeordnet sind, sind sie ohne weiteres zugänglich und deshalb bei einem Defekt ebenfalls leicht austauschbar.The individual modules (1A to 1C) attached to the plates (42, 43) can be attached to the plates (42, 43) individually in different positions relative to one another. It is also possible to align the plates (42, 43) with respect to the machine frame (45) and to fasten them to the machine frame (45) in a common aligned position. Since the device consists of a large number of individual modules, it is possible to enlarge or reduce the device quickly and easily by additional or fewer modules (1) according to the application. In addition, a single module can be easily replaced as a whole in the event of a defect. Since the drive motors (4) are also on the outside in the opposite arrangement (FIG. 5) are arranged, they are easily accessible and therefore also easily replaceable in the event of a defect.

Wie in Fig. 6 und 7 dargestellt ist, befinden sich die Fadenzubringer (3A bis 3E) in der Zustellposition in benachbarten Positionen. Es ist selbstverständlich möglich, die einzelnen Moduln so auszurichten, daß alle Fadenzubringer (3A bis 3E) eine im wesentlichen auf einer gleichen Achse liegende oder sogar in einem gleichen Punkt liegende Zustellposition einnehmen.As shown in Figs. 6 and 7, the thread feeders (3A to 3E) are in the feed position in adjacent positions. It is of course possible to align the individual modules in such a way that all thread feeders (3A to 3E) assume an infeed position that is essentially on the same axis or even at the same point.

Da die Bewegung der Fadenzubringer (3) unabhängig von der Bewegung anderer Webmaschinenantriebe ist, ist der Vorteil gegeben, daß beispielsweise nach einem Fadenbruch der betreffende Fadenzubringer (3) erneut in die Zustellposition gebracht werden kann, ohne diese Bewegung mit anderen Maschinenantrieben zu synchronisieren, d.h. andere Maschinenantriebe vorwärts- oder zurückzubewegen. Vor allem ist aber der Vorteil gegeben, daß nur relativ geringe bewegliche Massen vorhanden sind, so daß hohe Arbeitsgeschwindigkeiten und damit eine hohe Webmaschinengeschwindigkeit realisierbar ist.Since the movement of the thread feeder (3) is independent of the movement of other weaving machine drives, there is the advantage that, for example after a thread break, the thread feeder (3) in question can be brought back into the infeed position without synchronizing this movement with other machine drives, i.e. to move other machine drives forwards or backwards. Above all, however, there is the advantage that only relatively small movable masses are present, so that high working speeds and thus a high weaving machine speed can be achieved.

Durch eine geeignete Steuerung der Antriebsmotoren (4) ist ferner der Vorteil gegeben, daß die Ruheposition der Fadenzubringer (3) verändert werden kann, ohne daß mechanische Einstellungen vorgenommen werden müssen. Eine entsprechende Einstellung kann über die Steuereinheit (20) erfolgen, die beispielsweise mit einer Eingabeeinheit versehen ist.A suitable control of the drive motors (4) also has the advantage that the rest position of the thread feeder (3) can be changed without mechanical adjustments having to be made. A corresponding setting can be made via the control unit (20), which is provided with an input unit, for example.

Bei den dargestellten Ausführungsbeispielen sind die Fadenzubringer (3) mit Fadenaugen (21) versehen. Bei einer anderen Ausführungsform wird vorgesehen, daß die Fadenzubringer (3) mit Fadenklemmen versehen werden, wie dies ebenfalls durch den Stand der Technik bekannt ist.In the exemplary embodiments shown, the thread feeders (3) are provided with thread eyes (21). In another embodiment it is provided that the thread feeders (3) are provided with thread clamps, as is also known from the prior art.

Bei einer abgewandelten Ausführungsform sind die Führungen (12) der Fadenzubringer (3) mit gummielastischen Lagern gehalten, so daß die Achse (14) entfällt. Bei einer anderen Ausführung wird vorgesehen, daß die Fadenzubringer (3) in Querrichtung elastisch abgestützt sind.In a modified embodiment, the guides (12) of the thread feeder (3) are held with rubber-elastic bearings, so that the axis (14) is omitted. In another embodiment it is provided that the thread feeders (3) are elastically supported in the transverse direction.

Darüber hinaus ist es möglich, die Fadenzubringer (3) auf einer geradlinigen Bewegung zwischen der Ruheposition und der Zustellposition zu bewegen, wenn durch andere Mittel vorgesehen wird, daß die Querbewegung des Exzenterantriebs bezüglich der hin- und hergehenden Bewegung des Fadenzubringers (3) ausgeglichen wird. Dies kann beispielsweise dadurch geschehen, daß der Fadenzubringer (3) aus zwei Teilen besteht, die über ein Gelenk miteinander verbunden sind, das eine zur Motorwelle (5) parallele Drehachse aufweist.In addition, it is possible to move the thread feeder (3) in a straight line movement between the rest position and the infeed position if it is provided by other means that the transverse movement of the eccentric drive with respect to the reciprocating movement of the thread feeder (3) is compensated for . This can happen, for example, in that the thread feeder (3) consists of two parts which are connected to one another via a joint which has an axis of rotation parallel to the motor shaft (5).

Claims (17)

  1. Device for selecting and supplying wefts (30) to a feed member (31) for a weaving machine with at least one rod-shaped thread feeder (3) associated with a weft, which, can be guided in a lengthwise direction and can move between a rest position and a supply position, by means of an eccentric drive (6) and a specific drive motor (4), characterised in that the rod-shaped feeder (3) is directly connected to the eccentric drive (6) which has a path which at least corresponds to the path of the feeder between its rest-position and its supply-position, and in that a guiding means (12), which enables arched movements of the rod-shaped feeder (3) for compensating transverse movements of an eccentric drive (6), is provided for each feeder.
  2. Device in accordance with claim 1, characterized in that a guiding means (12), which can rotate around a shaft (14), which runs parallel to a shaft (5) of the associated eccentric drive (6), is provided for each feeder (3, 11).
  3. Device in accordance with claim 1 or 2, characterized in that each feeder (3, 11), with its drive motor (4), its eccentric drive (6) and its guiding means (12), is developed as a modular unit (1).
  4. Device in accordance with claim 3, characterized in that each modular unit (1) has a plate (16) on which, on one side, the drive motor (4), and on another side, the feeder (3, 11) and the guiding means (12), are attached.
  5. Device in accordance with any one of the claims 1 to 4, characterized in that means (25, 26) of recording and/or determining the angle of rotation of the drive motors (4) are provided.
  6. Device in accordance with claims 4 and 5, characterized in that the plates (16) are provided with abutment shoulders (25, 26), which define a supply- and/or rest-position of an eccentric drive (6), are provided.
  7. Device in accordance with any one of claims 1 to 6, characterized in that the eccentric drives (6) are developed as crank drives with a crank (9) disposed on the shaft (5) of the drive motor (4), cranks having a crank-pin (10) on which, in each case, a feeder (3, 11) is supported.
  8. Device in accordance with claim 7, characterized in that cranks (9) of crank drives have abutment shoulders (25, 26) associated with them.
  9. Device in accordance with any one of claims 1 to 8, characterized in that the feeders (3, 11) of several modular units (1) are disposed in a common plane.
  10. Device in accordance with claim 9, characterized in that modular units (1) of adjacent feeders (3, 11) are symmetrically arranged in relation to the common plane of feeders.
  11. Device in accordance with claim 10, characterized in that drive motors (4) of modular units (1), which are symmetrically arranged in relation to each other, have opposite directions of rotation.
  12. Device in accordance with any one of claims 1 to 11, characterized in that drive motors (4) are connected to a control unit (20) which controls switching-on and -off and the direction of rotation of said drive motors.
  13. Device in accordance with claim 12, characterized in that the control unit (20) contains means for controlling the speed of rotation of drive motors (4).
  14. Device in accordance with claim 12 or 13, characterized in that the control unit (20) includes means of retaining drive motors (4) in an intermediate position between the rest-position and the supply-position.
  15. Device in accordance with any one of claims 12 to 14, characterized in that drive motors (4) are stepping motors, and in that a control unit (20) supplies the drive motors with set pulse-sequences.
  16. Device in accordance with any one of claims 12 to 15, characterized in that the control unit (20) has means for varying the pulse frequency of the pulse-sequence supplied to drive motors (4).
  17. Device in accordance with any one of claims 12 to 16, characterized in that each drive motor (4) has a switching means (48) associated with it and through operation of which a feeder (3) can be brought into a threading position.
EP93117545A 1992-11-16 1993-10-29 Device to select and feed weft yarns for a loom Expired - Lifetime EP0598264B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP96119033A EP0763613B1 (en) 1992-11-16 1993-10-29 Device to select and feed weft yarns for a loom

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9200987A BE1006347A3 (en) 1992-11-16 1992-11-16 DEVICE FOR PRESENTING weft threads in weaving machines.
BE9200987 1992-11-16

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP96119033A Division EP0763613B1 (en) 1992-11-16 1993-10-29 Device to select and feed weft yarns for a loom
EP96119033.7 Division-Into 1996-11-28

Publications (2)

Publication Number Publication Date
EP0598264A1 EP0598264A1 (en) 1994-05-25
EP0598264B1 true EP0598264B1 (en) 1997-11-26

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EP93117545A Expired - Lifetime EP0598264B1 (en) 1992-11-16 1993-10-29 Device to select and feed weft yarns for a loom
EP96119033A Expired - Lifetime EP0763613B1 (en) 1992-11-16 1993-10-29 Device to select and feed weft yarns for a loom

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EP96119033A Expired - Lifetime EP0763613B1 (en) 1992-11-16 1993-10-29 Device to select and feed weft yarns for a loom

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US (1) US5400834A (en)
EP (2) EP0598264B1 (en)
JP (2) JP3560994B2 (en)
CN (2) CN1034597C (en)
BE (1) BE1006347A3 (en)
DE (2) DE59307739D1 (en)
HK (2) HK1001594A1 (en)

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Also Published As

Publication number Publication date
CN1072286C (en) 2001-10-03
JPH06192944A (en) 1994-07-12
JP3560994B2 (en) 2004-09-02
BE1006347A3 (en) 1994-07-26
EP0763613A3 (en) 1997-10-01
EP0763613A2 (en) 1997-03-19
HK1001594A1 (en) 1998-06-26
DE59307739D1 (en) 1998-01-08
CN1158368A (en) 1997-09-03
US5400834A (en) 1995-03-28
JP2004137665A (en) 2004-05-13
CN1089916A (en) 1994-07-27
JP3611844B2 (en) 2005-01-19
DE59310049D1 (en) 2000-06-29
EP0598264A1 (en) 1994-05-25
EP0763613B1 (en) 2000-05-24
CN1034597C (en) 1997-04-16
HK1002075A1 (en) 1998-07-31

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