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EP1956124A1 - Method and device for opening or closing a grip clamp of a gripper of a loom - Google Patents

Method and device for opening or closing a grip clamp of a gripper of a loom Download PDF

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Publication number
EP1956124A1
EP1956124A1 EP08005257A EP08005257A EP1956124A1 EP 1956124 A1 EP1956124 A1 EP 1956124A1 EP 08005257 A EP08005257 A EP 08005257A EP 08005257 A EP08005257 A EP 08005257A EP 1956124 A1 EP1956124 A1 EP 1956124A1
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EP
European Patent Office
Prior art keywords
gripper
stop element
opening
rapier
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08005257A
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German (de)
French (fr)
Other versions
EP1956124B1 (en
Inventor
Patrick Strubbe
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Picanol NV
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Picanol NV
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Filing date
Publication date
Application filed by Picanol NV filed Critical Picanol NV
Publication of EP1956124A1 publication Critical patent/EP1956124A1/en
Application granted granted Critical
Publication of EP1956124B1 publication Critical patent/EP1956124B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • D03D47/23—Thread grippers
    • 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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/20—Constructional features of the thread-engaging device on the inserters

Definitions

  • the invention relates to a method for opening or closing a gripper clamp of a gripper of a loom, in which a stop member of the gripper clamp against a stop element starts, which is adjustable by means of a motor drive, and an apparatus for performing the method.
  • the weaving machine operates at high speed in normal operation and is additionally provided that a slow crawl (crawl) is possible to make adjustments, it may happen that the displacement of the stop element in the direction of the trajectory of the gripper is not sufficient.
  • the aim is to make opening the gripper clamp as late as possible, as this reduces the problems. Even late opening does not cause a serious problem, as it only results in excess length of weft yarn. Since low-speed weaving is only done for relatively few weft picks, a larger drop in weft yarn is not a serious problem. In fast-running weaving machines, however, there is a risk that the displacement of the stop element is not sufficient to realize the slow-speed as late as possible opening of the gripper clamp.
  • the invention has for its object to provide a method of the type mentioned above, which allows a very early opening of the gripper clamp at operating at high speeds in normal operation looms early opening and operation with slow speed.
  • This object is achieved in that brought during a slow-running of the weaving machine, the stop element in the movement path of the stop member of the gripper clamp and this stop member is delivered, while the stop member is already in the region of the stop element.
  • the position of the stop element with respect to the direction of movement of the gripper is no longer decisive during the slow running of the loom, but rather the time at which the stop element is delivered to the stop member of the gripper clamp.
  • the abutment member may have moved over a relatively long distance in the longitudinal direction of the abutment member.
  • Such a positive opening of the gripper clamp in the manner of actuation of a switch is known in principle.
  • a fixed at a predetermined point, pivotable stop element is actuated by a drive at a predetermined opening time to individually determine the opening time for each introduced weft.
  • a drive with an electric motor is provided.
  • this method causes difficulties in normal operation very fast weaving machines.
  • the position of the gripper is detected during the slow speed and the stop member delivered to the stop member of the gripper clamp at a predetermined position of the gripper.
  • the position of the gripper can be detected in particular via the angular position of the main drive shaft of the weaving machine or via the angular position of a drive wheel for a gripper-carrying gripper band.
  • a device for opening a gripper clamp of a gripper of a loom is provided to solve the problem, in which means are provided for detecting the position of the gripper, which are connected to a controller, during the slow running of the loom, the stop element at a predetermined position of the gripper brings in the movement path of the abutment part of the gripper clamp and delivers the stop member.
  • the stop element is further provided that are provided for positioning the stop element in the longitudinal direction of the movement path of the gripper and for delivering transverse to the movement path each own electric motor drives.
  • the weaving machine can be operated so that during the slow-speed opening is controlled solely by the electromotive drive moving the stop element transverse to the trajectory of the gripper, while in normal operation, the stop element is positioned in the longitudinal direction of the trajectory of the gripper that due the position is opened at an appropriate time, which depends on the speed and other web parameters.
  • gripper loom shown contains two gripper bands 1, each carrying a gripper 2 and 3 at their free ends.
  • the gripper 2 is the so-called Gebergreifer or Bringergreifer, while the gripper 3 is a gripper rapier.
  • the Gebergreifer 2 takes on the entry side of the shed 12 formed from shed a weft thread 4, which is presented to him by means of a presentation device 19.
  • the weft thread 4 is located on a supply reel 17, from which a weft thread to be inserted is taken off and wound onto a feeder 18, before it is inserted into the shed.
  • the gripper bands 1 are driven by means of drive wheels 6, around which they are guided around by means of guides 7.
  • the gripper bands 1 move into the shed into and out again, so that the Gebergreifer 2 and the gripper rapier 3 meet in the middle of the shed.
  • the gripper rapier 3 then takes over the weft thread and pulls it to the opposite side.
  • the registered weft thread is then struck by means of a reed 11 to the fabric 13.
  • the reed 11 is arranged on a sley 10 and moves back and forth.
  • the warp threads 12 are alternately raised and lowered by means of so-called heddle shafts 9. After entering a weft thread 4, the shed is changed.
  • the gripper rapier 3 has a thread clamp, with which the weft is held during transport and is opened when the gripper rapier 3 has reached the opposite side.
  • the closing of the Geberreifers 2 when picking up a weft thread and entering the shed can be controlled by a device 5.
  • the opening of the gripper rapier 3 is controlled in the area outside the shed on the side opposite the entry side by means of a device 5.
  • the device 5 is for a gripper rapier 3 on hand of Fig. 3 and 4 explained in more detail.
  • the in Fig. 3 and 4 Slave gripper 3 shown schematically is attached to the end of a rapier band 1. It has a hook-shaped end, in the region of which a gripper clamp 20 is provided for a weft thread 4.
  • the gripper clamp 20 is formed by a leg of the hook and an arm of a two-armed stop member 21, which is pivotable about an axis 22.
  • the stop member 21 protrudes with an angled approach out of the gripper rapier 3. When this approach is pushed into the gripper rapier 3, the gripper clamp 20 is opened. This opening takes place by means of the device 5.
  • the device 5 contains a strip-shaped stop element 24 which forms a stop for the stop part 21 of the gripper rapier 3.
  • the stop element 24 is guided in a stationary mounted on the loom, cross slide-like guide 25 in two mutually perpendicular directions.
  • the one direction extends in the direction of the double arrow B, i. parallel to the trajectory of the gripper rapier 3 and its rapier band 1.
  • the other direction extends in the direction of the double arrow C, i. transverse to the path of movement of the gripper rapier 3 and the rapier band. 1
  • the stop element 24 is adjustable in the direction of the double arrow B by means of a drive 26, which is an electric motor, for example a Servomotor or stepper motor contains, of which only the motor shaft 27 is shown.
  • This motor shaft 27 is connected via a crank mechanism 28, 29 with the stop element 24, which by means of the drive 26 in the direction of the double arrow B back and forth, ie in the longitudinal direction of the movement path of the gripper rapier 3 is adjustable.
  • the stop element 24 is also adjustable in the direction of the double arrow C by means of an electromotive drive 30.
  • the drive 30 includes an electric motor, such as a servomotor or stepper motor, of which only the motor shaft 31 is shown.
  • the motor shaft 30 is articulated by means of a crank mechanism 32, 33 to a holder 34, in which the stop element 24 is slidably mounted in the direction of the double arrow B.
  • the stop element 24 is thus adjustable in the direction of the double arrow B by means of the electromotive drive 26 and in the direction of the double arrow C by means of the electric motor drive 30.
  • the stop element When the weaving machine is operating at normal speed, the stop element is in the in Fig. 4 shown position, ie it is in the movement path of the stop member 21, so that the gripper clamp 20 of the gripper rapier is opened when the approach of the stop member 21 against the stop member 24 starts.
  • the position of the stop element 24 in the longitudinal direction of the movement path of the gripper rapier 3 and the rapier band 1 and thus the distance to the end of the shed is set via the drive 26 by a controller 14 ( Fig. 1 ).
  • the position depends on web parameters, such as weaving speed, material and strength of the weft threads or the like.
  • the position can be adapted to weft threads of different properties and also to different speeds for the different weft threads.
  • the values for this are input to the control unit 14 by means of an input unit, not shown, which, for example, the appropriate positions corresponding to one in a Memory stored program selects.
  • the drive 30 is only operated in normal operation when the gripper rapier 3 after reaching its extreme end position reverses its movement and is inserted into the shed. So that in this direction the stop member 21 does not run against the stop element 24, the stop element 24 by means of the drive 30 for a short time in the position after Fig. 3 to be brought.
  • the position of the stop element 24 in the direction of the double arrow B is not changed.
  • the opening of the gripper clamp 20, which should be as late as possible in this case, ie when the gripper rapier 3 has already moved far out of the shed, is "switched" by means of the drive 30 which causes a positive opening.
  • the stop element 24 is in the in Fig. 3 shown position and only then by means of the drive 30 in the position Fig. 4 shifted if positive opening of the gripper clamp 20 is desired.
  • This opening is then position-dependent on the slave gripper 3.
  • means are provided to detect the position of the gripper rapier 3 and input to the control unit 14, which then opens the gripper clamp 20 at a suitable time.
  • the opening is designed to a predetermined angular position of the main shaft.
  • an angle encoder can be attached to the main shaft in a manner not shown, which is connected to the control unit. Since the rapier bands 1 and thus also their drive wheels 6 run synchronously with the main shaft, it is also possible to detect the position of the grippers 2, 3 in relation to the angular position of the main shaft by means of angle encoders 35 which are arranged on the drive wheels 6 and to the Control unit 14 are connected. As a rule, an angle transmitter 35 on one of the drive wheels 6 is sufficient.
  • stop element 24 which is pivotable about its pivot point to the crank drive 26 to perform a "switching" to open the gripper clamp 20.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Advancing Webs (AREA)
  • Manipulator (AREA)

Abstract

Under normal running, the gripper clip (20) is opened by the movement of the end of the lever (21) over the cam (24), the timing being altered by adjusting the position of the cam in the direction (B) by means of a drive (28, 29). During slow running of the loom, the lever (21) is moved by displacing the cam (24) at right angles in the direction (C) by means of a drive (30). Opening of the clip (20) is then under the control of a sensor for the position of the gripper (3) acting on the drive (30). An independent claim is also included for an arrangement for opening the gripper clip (20), including electrical drives (26, 30) and sensors to indicate the position of the grippers. During slow running of the loom the cam (24) is moved towards the lever (21) to open the clip (20) at a predetermined position of the gripper. Preferred Features: Separate electric motors and cranks (28, 29, 32, 33) are provided for the two motions in the directions (B) and (C).

Description

Die Erfindung betrifft ein Verfahren zum Öffnen oder Schließen einer Greiferklemme eines Greifers einer Webmaschine, bei welchem ein Anschlagteil der Greiferklemme gegen ein Anschlagelement anläuft, das mittels eines motorischen Antriebs verstellbar ist, und eine Vorrichtung zum Durchführen des Verfahrens.The invention relates to a method for opening or closing a gripper clamp of a gripper of a loom, in which a stop member of the gripper clamp against a stop element starts, which is adjustable by means of a motor drive, and an apparatus for performing the method.

Es ist bekannt ( WO 97/40218 ), ein Anschlagelement für das Anschlagteil einer Greiferklemme mittels eines elektromotorischen Antriebs in Längsrichtung der Bewegungsbahn des Greifers auf vorgegebene Positionen einzustellen. Die Positionen werden von einer Steuereinheit in Abhängigkeit von Webparametern vorgegeben, beispielsweise abhängig davon, ob mit normaler Geschwindigkeit oder langsamer Geschwindigkeit gewoben wird. Beim normalen Weben wird das Anschlagelement näher am Webfach positioniert als bei einem langsamen Weben. Das Anschlagelement muss umso dichter am Webfach angeordnet sein, je höher die Webgeschwindigkeit ist.It is known ( WO 97/40218 ), to set a stop element for the abutment part of a gripper clamp by means of an electromotive drive in the longitudinal direction of the movement path of the gripper to predetermined positions. The positions are specified by a control unit in dependence on web parameters, for example, depending on whether it is woven at normal speed or slow speed. During normal weaving, the stop element is positioned closer to the shed than during slow weaving. The The higher the weaving speed, the more tightly the stop element must be arranged on the shed.

Aufgrund von elastischen Verformungen der einzelnen Bauteile ändern sich das Öffnen und Schließen des Webfaches sowie die Position des Greifers außerhalb des Webfaches bezüglich der Winkelposition der Hauptantriebswelle während des Langsamlaufs und des normalen Webens erheblich.Due to elastic deformations of the individual components, the opening and closing of the shed and the position of the gripper outside the shed with respect to the angular position of the main drive shaft during slow running and normal weaving change significantly.

Wenn die Webmaschine im Normalbetrieb mit hoher Geschwindigkeit arbeitet und zusätzlich vorgesehen ist, dass ein Langsambetrieb (Kriechgang) möglich ist, um Einstellungen vorzunehmen, so kann es vorkommen, dass der Verstellweg des Anschlagelementes in Richtung der Bewegungsbahn des Greifers nicht ausreicht.If the weaving machine operates at high speed in normal operation and is additionally provided that a slow crawl (crawl) is possible to make adjustments, it may happen that the displacement of the stop element in the direction of the trajectory of the gripper is not sufficient.

Beim Langsamlauf wird angestrebt, das Öffnen der Greiferklemme so spät wie möglich vorzunehmen, da das die Probleme verringert. Sogar ein verspätetes Öffnen führt nicht zu einem ernsthaften Problem, da es nur in einem zu langen Abfallstück an Schussgarn führt. Da das Weben im Langsamlauf nur für relativ wenig Schusseinträge durchgeführt wird, ist auch ein größerer Abfall an Schussgarn kein ernsthaftes Problem. Bei schnell laufenden Webmaschinen besteht jedoch die Gefahr, dass der Verstellweg des Anschlagelementes nicht ausreicht, um dem Langsamlauf ein möglichst spätes Öffnen der Greiferklemme zu verwirklichen.During slow running, the aim is to make opening the gripper clamp as late as possible, as this reduces the problems. Even late opening does not cause a serious problem, as it only results in excess length of weft yarn. Since low-speed weaving is only done for relatively few weft picks, a larger drop in weft yarn is not a serious problem. In fast-running weaving machines, however, there is a risk that the displacement of the stop element is not sufficient to realize the slow-speed as late as possible opening of the gripper clamp.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu schaffen, das bei im Normalbetrieb mit hohen Geschwindigkeiten arbeitenden Webmaschinen ein frühes Öffnen und bei Betrieb mit Langsamlauf ein sehr spätes Öffnen der Greiferklemme erlaubt.The invention has for its object to provide a method of the type mentioned above, which allows a very early opening of the gripper clamp at operating at high speeds in normal operation looms early opening and operation with slow speed.

Diese Aufgabe wird dadurch gelöst, dass während eines Langsamlaufes der Webmaschine das Anschlagelement in die Bewegungsbahn des Anschlagteils der Greiferklemme gebracht und diesem Anschlagteil zugestellt wird, während sich das Anschlagteil bereits im Bereich des Anschlagelementes befindet.This object is achieved in that brought during a slow-running of the weaving machine, the stop element in the movement path of the stop member of the gripper clamp and this stop member is delivered, while the stop member is already in the region of the stop element.

Bei diesem Verfahren ist während des Langsamlaufs der Webmaschine nicht mehr die Position des Anschlagelementes bezüglich der Richtung der Bewegungsbahn des Greifers maßgebend, sondern vielmehr der Zeitpunkt, zu welchem das Anschlagelement dem Anschlagteil der Greiferklemme zugestellt wird. Zu diesem Zeitpunkt kann sich das Anschlagteil über einen relativ großen Weg in Längsrichtung des Anschlagelementes bewegt haben.In this method, the position of the stop element with respect to the direction of movement of the gripper is no longer decisive during the slow running of the loom, but rather the time at which the stop element is delivered to the stop member of the gripper clamp. At this time, the abutment member may have moved over a relatively long distance in the longitudinal direction of the abutment member.

Ein derartiges positives Öffnen der Greiferklemme in der Art einer Betätigung eines Schalters ist prinzipiell bekannt. Bei dieser Bauart wird ein an einer vorgegebenen Stelle befestigtes, schwenkbares Anschlagelement mittels eines Antriebes zu einem vorgegebenen Öffnungszeitpunkt betätigt, um für jeden eingebrachten Schussfaden individuell den Öffnungszeitpunkt zu bestimmen. Dabei ist ein Antrieb mit einem elektrischen Motor vorgesehen. Dieses Verfahren bereitet jedoch Schwierigkeiten bei im Normalbetrieb sehr schnell arbeitenden Webmaschinen.Such a positive opening of the gripper clamp in the manner of actuation of a switch is known in principle. In this type, a fixed at a predetermined point, pivotable stop element is actuated by a drive at a predetermined opening time to individually determine the opening time for each introduced weft. In this case, a drive with an electric motor is provided. However, this method causes difficulties in normal operation very fast weaving machines.

In weiterer Ausgestaltung der Erfindung wird während des Langsamlaufs die Position des Greifers erfasst und das Anschlagelement dem Anschlagteil der Greiferklemme bei einer vorbestimmten Position des Greifers zugestellt. Die Position des Greifers kann insbesondere über die Winkelstellung der Hauptantriebswelle der Webmaschine oder über die Winkelstellung eines Antriebsrades für ein den Greifer tragendes Greiferband erfasst werden.In a further embodiment of the invention, the position of the gripper is detected during the slow speed and the stop member delivered to the stop member of the gripper clamp at a predetermined position of the gripper. The position of the gripper can be detected in particular via the angular position of the main drive shaft of the weaving machine or via the angular position of a drive wheel for a gripper-carrying gripper band.

In weiterer Ausgestaltung der Erfindung wird zur Lösung der Aufgabe eine Vorrichtung zum Öffnen einer Greiferklemme eines Greifers einer Webmaschine vorgesehen, bei welcher Mittel zum Erfassen der Position des Greifers vorgesehen sind, die mit einer Steuerung verbunden sind, die während des Langsamlaufs der Webmaschine das Anschlagelement bei einer vorbestimmten Position des Greifers in die Bewegungsbahn des Anschlagteils der Greiferklemme bringt und dem Anschlagteil zustellt. Zweckmäßig wird dabei weiter vorgesehen, dass zum Positionieren des Anschlagelementes in Längsrichtung der Bewegungsbahn des Greifers und zum Zustellen quer zur Bewegungsbahn jeweils eigene elektromotorische Antriebe vorgesehen sind. In diesem Fall kann die Webmaschine so betrieben werden, dass während des Langsamlaufs das Öffnen ausschließlich von dem das Anschlagelement quer zur Bewegungsbahn des Greifers bewegenden elektromotorischen Antrieb gesteuert wird, während beim normalen Betrieb das Anschlagelement in Längsrichtung der Bewegungsbahn des Greifers so positioniert wird, dass aufgrund der Position das Öffnen zu einer geeigneten Zeit erfolgt, die von der Geschwindigkeit und sonstigen Webparametern abhängig ist.In a further embodiment of the invention, a device for opening a gripper clamp of a gripper of a loom is provided to solve the problem, in which means are provided for detecting the position of the gripper, which are connected to a controller, during the slow running of the loom, the stop element at a predetermined position of the gripper brings in the movement path of the abutment part of the gripper clamp and delivers the stop member. Appropriately, it is further provided that are provided for positioning the stop element in the longitudinal direction of the movement path of the gripper and for delivering transverse to the movement path each own electric motor drives. In this case, the weaving machine can be operated so that during the slow-speed opening is controlled solely by the electromotive drive moving the stop element transverse to the trajectory of the gripper, while in normal operation, the stop element is positioned in the longitudinal direction of the trajectory of the gripper that due the position is opened at an appropriate time, which depends on the speed and other web parameters.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung des in der Zeichnung dargestellten Ausführungsbeispiels und den Unteransprüchen.

Fig. 1
zeigt in schematischer Darstellung eine perspektivische Ansicht einer Greiferbandwebmaschine,
Fig. 2
eine Ansicht in Richtung des Pfeiles II der Fig. 1,
Fig. 3
eine Ansicht einer Vorrichtung zum Öffnen des Greifers in einer Position vor dem Durchführen eines Öffnens des Greifers und
Fig. 4
die Vorrichtung nach Fig. 3 während des Öffnens des Greifers.
Further features and advantages of the invention will become apparent from the following description of the embodiment shown in the drawing and the dependent claims.
Fig. 1
shows a schematic representation of a perspective view of a rapier loom,
Fig. 2
a view in the direction of arrow II the Fig. 1 .
Fig. 3
a view of a device for opening the gripper in a position before performing an opening of the gripper and
Fig. 4
the device after Fig. 3 during opening of the gripper.

Die in Fig. 1 und 2 dargestellte Greiferwebmaschine enthält zwei Greiferbänder 1, die an ihren freien Enden jeweils einen Greifer 2 und 3 tragen. Der Greifer 2 ist der sogenannte Gebergreifer oder Bringergreifer, während der Greifer 3 ein Nehmergreifer ist. Der Gebergreifer 2 übernimmt auf der Eintragsseite des aus Kettfäden 12 gebildeten Webfachs einen Schussfaden 4, der ihm mittels einer Präsentiereinrichtung 19 dargeboten wird. Der Schussfaden 4 befindet sich auf einer Vorratsspule 17, von der ein einzutragenden Schussfaden abgezogen und auf ein Vorspulgerät 18 aufgewickelt wird, bevor er in das Webfach eingetragen wird. Es sind üblicherweise mehrere Spulen 17 und mehrere Vorspulgeräte 18 vorgesehen, deren Schussfäden in einem vorwählbaren Muster von der Einrichtung zum Präsentieren 19 dem Gebergreifer 2 dargeboten werden. Die Greiferbänder 1 werden mittels Antriebsrädern 6 angetrieben, um die sie mittels Führungen 7 herumgeführt werden. Die Greiferbänder 1 bewegen sich in das Webfach hinein und wieder heraus, so dass sich der Gebergreifer 2 und der Nehmergreifer 3 in der Mitte des Webfaches treffen. Der Nehmergreifer 3 übernimmt dann den Schussfaden und zieht ihn auf die gegenüberliegende Seite. Der eingetragene Schussfaden wird anschließend mittels eines Webblattes 11 an das Gewebe 13 angeschlagen. Das Webblatt 11 ist auf einer Weblade 10 angeordnet und bewegt sich vor und zurück.In the Fig. 1 and 2 gripper loom shown contains two gripper bands 1, each carrying a gripper 2 and 3 at their free ends. The gripper 2 is the so-called Gebergreifer or Bringergreifer, while the gripper 3 is a gripper rapier. The Gebergreifer 2 takes on the entry side of the shed 12 formed from shed a weft thread 4, which is presented to him by means of a presentation device 19. The weft thread 4 is located on a supply reel 17, from which a weft thread to be inserted is taken off and wound onto a feeder 18, before it is inserted into the shed. There are usually several coils 17 and a plurality of Vorspulgeräte 18 are provided, the weft threads are presented in a preselectable pattern of the means for presenting 19 the Gebergreifer 2. The gripper bands 1 are driven by means of drive wheels 6, around which they are guided around by means of guides 7. The gripper bands 1 move into the shed into and out again, so that the Gebergreifer 2 and the gripper rapier 3 meet in the middle of the shed. The gripper rapier 3 then takes over the weft thread and pulls it to the opposite side. The registered weft thread is then struck by means of a reed 11 to the fabric 13. The reed 11 is arranged on a sley 10 and moves back and forth.

Um ein Webfach zu bilden, werden die Kettfäden 12 wechselweise mittels sogenannter Webschäfte 9 angehoben und abgesenkt. Nach dem Eintragen eines Schussfadens 4 wird das Webfach gewechselt.In order to form a shed, the warp threads 12 are alternately raised and lowered by means of so-called heddle shafts 9. After entering a weft thread 4, the shed is changed.

Wenn der Gebergreifer 2 einen ihm dargebotenen Schussfaden 4 übernimmt, so muss an ihm eine Fadenklemme geschlossen werden. Auch der Nehmergreifer 3 besitzt eine Fadenklemme, mit der der Schussfaden während des Transports gehalten wird und die geöffnet wird, wenn der Nehmergreifer 3 die gegenüberliegende Seite erreicht hat. Das Schließen des Gebergreifers 2 beim Aufnehmen einer Schussfadens und beim Eintreten in das Webfach kann mittels einer Vorrichtung 5 gesteuert werden. Das Öffnen des Nehmergreifers 3 wird im Bereich außerhalb des Webfaches auf der der Eintragseite gegenüberliegenden Seite mittels einer Vorrichtung 5 gesteuert. Die Vorrichtung 5 ist für einen Nehmergreifer 3 an hand von Fig. 3 und 4 näher erläutert.If the Gebergreifer 2 takes him a given weft thread 4, it must be closed on him a thread clamp. Also, the gripper rapier 3 has a thread clamp, with which the weft is held during transport and is opened when the gripper rapier 3 has reached the opposite side. The closing of the Geberreifers 2 when picking up a weft thread and entering the shed can be controlled by a device 5. The opening of the gripper rapier 3 is controlled in the area outside the shed on the side opposite the entry side by means of a device 5. The device 5 is for a gripper rapier 3 on hand of Fig. 3 and 4 explained in more detail.

Der in Fig. 3 und 4 schematisch dargestellte Nehmergreifer 3 ist an dem Ende eines Greiferbandes 1 befestigt. Er besitzt ein hakenförmiges Ende, in dessen Bereich eine Greiferklemme 20 für einen Schussfaden 4 vorgesehen ist. Die Greiferklemme 20 wird von einem Schenkel des Hakens und einem Arm eines zweiarmigen Anschlagteils 21 gebildet, das um eine Achse 22 verschwenkbar ist. Das Anschlagteil 21 ragt mit einem abgewinkelten Ansatz aus dem Nehmergreifer 3 heraus. Wenn dieser Ansatz in den Nehmergreifer 3 hineingedrückt wird, so wird die Greiferklemme 20 geöffnet. Dieses Öffnen erfolgt mittels der Vorrichtung 5.The in Fig. 3 and 4 Slave gripper 3 shown schematically is attached to the end of a rapier band 1. It has a hook-shaped end, in the region of which a gripper clamp 20 is provided for a weft thread 4. The gripper clamp 20 is formed by a leg of the hook and an arm of a two-armed stop member 21, which is pivotable about an axis 22. The stop member 21 protrudes with an angled approach out of the gripper rapier 3. When this approach is pushed into the gripper rapier 3, the gripper clamp 20 is opened. This opening takes place by means of the device 5.

Die Vorrichtung 5 enthält ein leistenförmiges Anschlagelement 24, das einen Anschlag für das Anschlagteil 21 des Nehmergreifers 3 bildet. Das Anschlagelement 24 ist in einer stationär an der Webmaschine angebrachten, kreuzschlittenartigen Führung 25 in zwei lotrecht zueinander ausgerichteten Richtungen geführt. Die eine Richtung erstreckt sich in Richtung des Doppelpfeils B, d.h. parallel zu Bewegungsbahn des Nehmergreifers 3 und seines Greiferbandes 1. Die andere Richtung erstreckt sich in Richtung des Doppelpfeils C, d.h. quer zur Bewegungsbahn des Nehmergreifers 3 und des Greiferbandes 1.The device 5 contains a strip-shaped stop element 24 which forms a stop for the stop part 21 of the gripper rapier 3. The stop element 24 is guided in a stationary mounted on the loom, cross slide-like guide 25 in two mutually perpendicular directions. The one direction extends in the direction of the double arrow B, i. parallel to the trajectory of the gripper rapier 3 and its rapier band 1. The other direction extends in the direction of the double arrow C, i. transverse to the path of movement of the gripper rapier 3 and the rapier band. 1

Das Anschlagelement 24 ist in Richtung des Doppelpfeils B mittels eines Antriebes 26 verstellbar, der einen Elektromotor, beispielsweise einen Stellmotor oder Schrittmotor enthält, von welchem nur die Motorwelle 27 dargestellt ist. Diese Motorwelle 27 ist über einen Kurbeltrieb 28, 29 mit dem Anschlagelement 24 verbunden, das mittels des Antriebes 26 in Richtung des Doppelpfeils B hin- und herbewegbar, d.h. in Längsrichtung der Bewegungsbahn des Nehmergreifers 3 einstellbar ist.The stop element 24 is adjustable in the direction of the double arrow B by means of a drive 26, which is an electric motor, for example a Servomotor or stepper motor contains, of which only the motor shaft 27 is shown. This motor shaft 27 is connected via a crank mechanism 28, 29 with the stop element 24, which by means of the drive 26 in the direction of the double arrow B back and forth, ie in the longitudinal direction of the movement path of the gripper rapier 3 is adjustable.

Das Anschlagelement 24 ist in Richtung des Doppelpfeiles C ebenfalls mittels eines elektromotorischen Antriebs 30 verstellbar. Der Antrieb 30 enthält einen Elektromotor, beispielsweise einen Stellmotor oder Schrittmotor, von welchem nur die Motorwelle 31 dargestellt ist. Die Motorwelle 30 ist mittels eines Kurbeltriebes 32, 33 an einen Halter 34 angelenkt, in welchem das Anschlagelement 24 in Richtung des Doppelpfeiles B verschiebbar gelagert ist. Das Anschlagelement 24 ist somit in Richtung des Doppelpfeiles B mittels des elektromotorischen Antriebes 26 und in Richtung des Doppelpfeils C mittels des elektromotorischen Antriebes 30 verstellbar.The stop element 24 is also adjustable in the direction of the double arrow C by means of an electromotive drive 30. The drive 30 includes an electric motor, such as a servomotor or stepper motor, of which only the motor shaft 31 is shown. The motor shaft 30 is articulated by means of a crank mechanism 32, 33 to a holder 34, in which the stop element 24 is slidably mounted in the direction of the double arrow B. The stop element 24 is thus adjustable in the direction of the double arrow B by means of the electromotive drive 26 and in the direction of the double arrow C by means of the electric motor drive 30.

Wenn die Webmaschine mit Normalgeschwindigkeit arbeitet, befindet sich das Anschlagelement in der in Fig. 4 dargestellten Position, d.h. es liegt in der Bewegungsbahn des Anschlagteils 21, so dass die Greiferklemme 20 des Nehmergreifers geöffnet wird, wenn der Ansatz des Anschlagteils 21 gegen das Anschlagelement 24 anläuft. Die Position des Anschlagelementes 24 in Längsrichtung der Bewegungsbahn des Nehmergreifers 3 und des Greiferbandes 1 und damit der Abstand zu dem Ende des Webfaches wird über den Antrieb 26 von einer Steuerung 14 eingestellt (Fig. 1). Die Position ist abhängig von Webparametern, wie Webgeschwindigkeit, Material und Stärke der Schussfäden o.dgl. Dabei kann die Position an Schussfäden unterschiedlicher Eigenschaften und auch an unterschiedliche Geschwindigkeiten für die unterschiedlichen Schussfäden angepasst werden. Die Werte hierzu werden mittels einer nicht dargestellten Eingabeeinheit in die Steuereinheit 14 eingegeben, die beispielsweise die geeigneten Positionen entsprechend einem in einem Speicher abgelegten Programm auswählt. Der Antrieb 30 wird im Normalbetrieb nur dann betätigt, wenn der Nehmergreifer 3 nach Erreichen seiner äußersten Endstellung wieder seine Bewegung umkehrt und in das Webfach eingeführt wird. Damit in dieser Richtung das Anschlagteil 21 nicht an dem Anschlagelement 24 anläuft, kann das Anschlagelement 24 mittels des Antriebs 30 kurzzeitig in die Position nach Fig. 3 gebracht werden.When the weaving machine is operating at normal speed, the stop element is in the in Fig. 4 shown position, ie it is in the movement path of the stop member 21, so that the gripper clamp 20 of the gripper rapier is opened when the approach of the stop member 21 against the stop member 24 starts. The position of the stop element 24 in the longitudinal direction of the movement path of the gripper rapier 3 and the rapier band 1 and thus the distance to the end of the shed is set via the drive 26 by a controller 14 ( Fig. 1 ). The position depends on web parameters, such as weaving speed, material and strength of the weft threads or the like. The position can be adapted to weft threads of different properties and also to different speeds for the different weft threads. The values for this are input to the control unit 14 by means of an input unit, not shown, which, for example, the appropriate positions corresponding to one in a Memory stored program selects. The drive 30 is only operated in normal operation when the gripper rapier 3 after reaching its extreme end position reverses its movement and is inserted into the shed. So that in this direction the stop member 21 does not run against the stop element 24, the stop element 24 by means of the drive 30 for a short time in the position after Fig. 3 to be brought.

Wenn die Webmaschine im Langsamlauf betrieben wird, so wird die Position des Anschlagelementes 24 in Richtung des Doppelpfeils B nicht verändert. Das Öffnen der Greiferklemme 20, das in diesem Fall möglichst spät erfolgen soll, d.h. wenn der Nehmergreifer 3 sich bereits weit aus dem Webfach herausbewegt hat, wird mittels des Antriebes 30 "geschaltet" der ein positives Öffnen bewirkt. Das Anschlagelement 24 wird in die in Fig. 3 dargestellte Position gebracht und erst dann mittels des Antriebes 30 in die Position nach Fig. 4 verschoben, wenn positiv das Öffnen der Greiferklemme 20 gewünscht wird. Dieses Öffnen erfolgt dann positionsabhängig von dem Nehmergreifer 3. Hierzu sind Mittel vorgesehen, um die Position des Nehmergreifers 3 zu erfassen und in die Steuereinheit 14 einzugeben, die dann zu einem geeigneten Zeitpunkt die Greiferklemme 20 öffnet. Da die Greiferbänder 1 und somit auch der Gebergreifer 2 und der Nehmergreifer 3 sich synchron mit der Hauptantriebswelle der Webmaschine bewegen, wird das Öffnen auf eine vorgegebene Winkelposition der Hauptwelle ausgelegt. Hierzu kann an der Hauptwelle in nicht näher dargestellter Weise ein Winkelgeber angebracht werden, der mit der Steuereinheit verbunden ist. Da die Greiferbänder 1 und somit auch deren Antriebsräder 6 synchron mit der Hauptwelle laufen, ist es auch möglich, die Position der Greifer 2, 3 in Relation zu der Winkelposition der Hauptwelle mittels Winkelgebern 35 zu erfassen, die an den Antriebsrädern 6 angeordnet und an die Steuereinheit 14 angeschlossen sind. Dabei genügt in der Regel ein Winkelgeber 35 an einem der Antriebsräder 6.If the weaving machine is operated in slow motion, the position of the stop element 24 in the direction of the double arrow B is not changed. The opening of the gripper clamp 20, which should be as late as possible in this case, ie when the gripper rapier 3 has already moved far out of the shed, is "switched" by means of the drive 30 which causes a positive opening. The stop element 24 is in the in Fig. 3 shown position and only then by means of the drive 30 in the position Fig. 4 shifted if positive opening of the gripper clamp 20 is desired. This opening is then position-dependent on the slave gripper 3. For this purpose, means are provided to detect the position of the gripper rapier 3 and input to the control unit 14, which then opens the gripper clamp 20 at a suitable time. Since the rapier bands 1 and thus also the Gebergreifer 2 and the slave gripper 3 move synchronously with the main drive shaft of the loom, the opening is designed to a predetermined angular position of the main shaft. For this purpose, an angle encoder can be attached to the main shaft in a manner not shown, which is connected to the control unit. Since the rapier bands 1 and thus also their drive wheels 6 run synchronously with the main shaft, it is also possible to detect the position of the grippers 2, 3 in relation to the angular position of the main shaft by means of angle encoders 35 which are arranged on the drive wheels 6 and to the Control unit 14 are connected. As a rule, an angle transmitter 35 on one of the drive wheels 6 is sufficient.

Grundsätzlich ist es möglich, auch das Öffnen der Greiferklemme 20 des Nehmergreifers 3 während des Webens mit Normalgeschwindigkeit mittels des Antriebs 30 zu steuern. In den meisten Fällen ist es jedoch einfacher, hierfür nur die Position des Anschlagelementes 24 in Längsrichtung der Bewegungsbahn des Nehmergreifers 3 einzustellen.In principle, it is also possible to control the opening of the gripper clamp 20 of the gripper rapier 3 during weaving at normal speed by means of the drive 30. In most cases, however, it is easier to adjust only the position of the stop element 24 in the longitudinal direction of the movement path of the gripper rapier 3 for this purpose.

Es ist ohne weiteres möglich, eine Vorrichtung ähnlich der Vorrichtung 5 auch für einen Gebergreifer 2 einzusetzen, wobei dann allerdings nicht das Öffnen des Gebergreifers 2, sondern das Schließen des Gebergreifers 2 beim Erfassen eines Schussfadens 4 gesteuert wird.It is readily possible to use a device similar to the device 5 for a Gebergreifer 2, in which case, however, not the opening of the Gebergreifers 2, but the closing of the Gebergreifers 2 when detecting a weft thread 4 is controlled.

In Abwandlung der dargestellten Ausführungsform nach Fig. 3 und 4 sind auch andere Möglichkeiten zum Führen des Anschlagelementes 24 anwendbar. Insbesondere ist es möglich, ein Anschlagelement 24 vorzusehen, das um seine Anlenkstelle an den Kurbelantrieb 26 verschwenkbar ist, um ein "Schalten" zum Öffnen der Greiferklemme 20 durchzuführen.In a modification of the illustrated embodiment according to Fig. 3 and 4 Other possibilities for guiding the stop element 24 are also applicable. In particular, it is possible to provide a stop element 24 which is pivotable about its pivot point to the crank drive 26 to perform a "switching" to open the gripper clamp 20.

Claims (5)

Vorrichtung (5) zum Öffnen einer Greiferklemme eines Greifers oder zum Schließen einer Greiferklemme eines Greifers einer Webmaschine mit einem einem Anschlagteil (21) des Nehmergreifers oder des Gebergreifers zugeordneten Anschlagelement (24), das elektromotorisch verstellbar ist, dadurch gekennzeichnet, dass das Anschlagelement (24) mittels eines eigenen elektromotorischen Antriebs (26) in Längsrichtung der Bewegungsbahn des Nehmergreifers (3) oder des Gebergreifers (2) positionierbar und mittels eines eigenen elektromotorischen Antriebs (30) quer zu dieser Bewegungsbahn verstellbar ist.Device (5) for opening a gripper clamp of a gripper or for closing a gripper clamp of a gripper of a weaving machine with a stop member (21) of the gripper rapier or the Gebergreifers associated stop element (24) which is adjustable by electric motor, characterized in that the stop element (24 ) by means of its own electric motor drive (26) in the longitudinal direction of the movement path of the gripper rapier (3) or the Gebergreifers (2) positionable and by means of its own electric motor drive (30) is adjustable transversely to this trajectory. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass zum von Parametern abhängigen Einstellen der Position des Anschlagelements (24) in Längsrichtung der Bewegungsbahn des Nehmergreifers (3) oder des Gebergreifers (2) eine Steuerung (14) vorgesehen ist.Apparatus according to claim 1, characterized in that for the parameter-dependent setting of the position of the stop element (24) in the longitudinal direction of the movement path of the gripper rapier (3) or the Gebergreifers (2) a controller (14) is provided. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass Mittel (25) zum Erfassen der Position des Nehmergreifers (3) oder des Gebergreifers (3) vorgesehen sind, die an eine Steuerung (14) angeschlossen sind, die das Anschlagelement (24) in vorbestimmbaren Positionen des Nehmergreifers (3) oder des Gebergreifers (2) verstellt.Apparatus according to claim 1 or 2, characterized in that means (25) are provided for detecting the position of the gripper rapier (3) or the Gebergreifers (3), which are connected to a controller (14), the stop element (24) in pre-adjustable positions of the gripper rapier (3) or the Gebergreifers (2) adjusted. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Anschlagelement (24) in einer kreuzschlittenartigen Führung (25) in Längsrichtung der Bewegungsbahn des Nehmergreifers (3) oder des Gebergreifers (2) und quer dazu geführt ist.Device according to one of claims 1 to 3, characterized in that the stop element (24) in a cross slide-like guide (25) in the longitudinal direction of the movement path of the gripper rapier (3) or the Gebergreifers (2) and is guided transversely thereto. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die elektromotorischen Antriebe (26, 30) jeweils einzeln für sich ein- und ausschaltbar sind.Device according to one of claims 1 to 4, characterized in that the electromotive drives (26, 30) are individually switched on and off individually.
EP08005257A 2001-07-05 2002-06-25 Method and device for opening or closing a grip clamp of a gripper of a loom Expired - Lifetime EP1956124B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10134504A DE10134504A1 (en) 2001-07-05 2001-07-05 Method and device for opening a gripper clamp of a gripper of a weaving machine
EP02758268A EP1402096B1 (en) 2001-07-05 2002-06-25 Method and device for opening a gripper clip of a mechanical-loom gripper

Related Parent Applications (2)

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EP02758268.3 Division 2002-06-25
EP02758268A Division EP1402096B1 (en) 2001-07-05 2002-06-25 Method and device for opening a gripper clip of a mechanical-loom gripper

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EP1956124A1 true EP1956124A1 (en) 2008-08-13
EP1956124B1 EP1956124B1 (en) 2010-10-20

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EP02758268A Expired - Lifetime EP1402096B1 (en) 2001-07-05 2002-06-25 Method and device for opening a gripper clip of a mechanical-loom gripper
EP08005257A Expired - Lifetime EP1956124B1 (en) 2001-07-05 2002-06-25 Method and device for opening or closing a grip clamp of a gripper of a loom

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US (1) US7044174B2 (en)
EP (2) EP1402096B1 (en)
CN (1) CN1630748B (en)
AT (2) ATE393250T1 (en)
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WO (1) WO2003004746A1 (en)

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DE502006002809D1 (en) * 2006-01-06 2009-03-26 Sultex Ag Bringer rapier for a rapier loom
BE1018774A3 (en) 2009-06-10 2011-08-02 Picanol Nv GRIP UNIT, CONTROL UNIT FOR A GRIP UNIT AND WEAVING MACHINE.
CN103789909A (en) * 2012-11-02 2014-05-14 吴江市嘉运纺织整理有限公司 Yarn hook machine for weaving machines
ITUB20155478A1 (en) * 2015-11-11 2017-05-11 Pezzoli Miria DEVICE FOR THE OPENING OF A GRIPPING PLANT SOCKET ELEMENT OF A CLAMP FRAME, ITS 5 SOCKET ELEMENT AND OPENING METHOD OF SUCH A SOCKET ELEMENT
BE1028436B1 (en) * 2020-06-25 2022-01-31 Vandewiele Nv GUIDE DEVICE IN A GRIPPER LOAVY MACHINE, GRIPPER LOAVY MACHINE AND PROCEDURE FOR REFORMING A GRIPPER LOAVING MACHINE

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EP1054088A1 (en) 1999-05-14 2000-11-22 Lindauer Dornier Gesellschaft M.B.H Control device for controlling the locking lever of the drawing gripper in gripper looms

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US4949762A (en) * 1987-10-02 1990-08-21 Textilma Ag Weft gripper for shuttleless loom
WO1997040218A1 (en) 1996-04-19 1997-10-30 Picanol N.V. Device for opening a gripper clip of a mechanical loom gripper
EP1054088A1 (en) 1999-05-14 2000-11-22 Lindauer Dornier Gesellschaft M.B.H Control device for controlling the locking lever of the drawing gripper in gripper looms

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ATE393250T1 (en) 2008-05-15
DE50214728D1 (en) 2010-12-02
DE50212152D1 (en) 2008-06-05
CN1630748B (en) 2011-07-06
CN1630748A (en) 2005-06-22
ATE485412T1 (en) 2010-11-15
US7044174B2 (en) 2006-05-16
WO2003004746A1 (en) 2003-01-16
EP1402096B1 (en) 2008-04-23
EP1956124B1 (en) 2010-10-20
DE10134504A1 (en) 2003-01-16
US20040154686A1 (en) 2004-08-12
EP1402096A1 (en) 2004-03-31

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