EP1956124B1 - Procédé et dispositif d'ouverture ou de fermeture d'une griffe d'un métier à tisser - Google Patents

Procédé et dispositif d'ouverture ou de fermeture d'une griffe d'un métier à tisser Download PDF

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Publication number
EP1956124B1
EP1956124B1 EP08005257A EP08005257A EP1956124B1 EP 1956124 B1 EP1956124 B1 EP 1956124B1 EP 08005257 A EP08005257 A EP 08005257A EP 08005257 A EP08005257 A EP 08005257A EP 1956124 B1 EP1956124 B1 EP 1956124B1
Authority
EP
European Patent Office
Prior art keywords
gripper
opening
stop element
drive
clamp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP08005257A
Other languages
German (de)
English (en)
Other versions
EP1956124A1 (fr
Inventor
Patrick Strubbe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Picanol NV
Original Assignee
Picanol NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Picanol NV filed Critical Picanol NV
Publication of EP1956124A1 publication Critical patent/EP1956124A1/fr
Application granted granted Critical
Publication of EP1956124B1 publication Critical patent/EP1956124B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/12—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 device for opening or closing a gripper clamp of a gripper of a loom according to the preamble of patent claim 1.
  • EP 1054088 A1 It is also known ( EP 1054088 A1 ), to provide an electromotive pivotable about an axis transverse to the movement path of the gripper axis stop element for the abutment part of the gripper clamp.
  • the electromotive adjustment is carried out by means of a control device which determines the opening time and thus the position of the opening of the gripper individually for each weft. This is done for normal operation at high speeds, depending on the elasticity and / or the thickness of each weft to be inserted defining a suitable opening time and a suitable opening position.
  • 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.
  • the weaving machine can be operated so that during the slow opening, the opening is controlled solely by the electromotive drive moving the stop element transverse to the trajectory of the gripper, while in normal operation between two alternatives can be selected, namely that the stop element in the longitudinal direction Trajectory of the gripper is positioned so that due to the position of the opening takes place at an appropriate time, which is dependent on the speed and other weaving parameters, or that the control delivers the stop element at a predetermined position of the gripper to the stop member.
  • 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.

Landscapes

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

Claims (3)

  1. Dispositif pour ouvrir une pince de griffe (20) d'une pince preneuse (3) ou pour fermer une pince de griffe d'une pince d'amenée (2) d'une machine à tisser avec un élément de butée (24), qui est associé à une pièce de butée (21) de la pince de griffe (20) et qui peut être réglé au moyen d'un entraînement à moteur électrique (26, 30), caractérisé en ce que l'élément de butée (24) peut être positionné au moyen d'un premier entraînement à moteur électrique (26) en direction longitudinal (B) de la voie de déplacement de la pince preneuse (3) ou de la pince d'amenée (2) et transversalement à cela peut être avancé vers la pièce de butée (21) de la pince de griffe (20) au moyen d'un deuxième entraînement à moteur électrique (30) et en ce que des moyens (35) sont prévus pour détecter la position de la pince (2, 3), qui sont raccordés à une unité de commande (14), qui, au cours du tissage à une vitesse normale, amène l'élément de butée (24) dans une position prédéterminée de la pince (2, 3) dans la voie de déplacement de la pièce de butée (21) de la pince de griffe (20) et avance vers la pièce de butée (21).
  2. Dispositif selon la revendication 1, caractérisé en ce que l'élément de butée (24) est guidé dans un guide (25) comme chariot à glissière en direction longitudinale de la voie de déplacement de la pince preneuse (3) ou de la pince d'amenée (2) et transversalement à cela.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que les entraînements à moteur électrique (26, 30) sont chaque fois mis en ou hors service séparément.
EP08005257A 2001-07-05 2002-06-25 Procédé et dispositif d'ouverture ou de fermeture d'une griffe d'un métier à tisser Expired - Lifetime EP1956124B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10134504A DE10134504A1 (de) 2001-07-05 2001-07-05 Verfahren und Vorrichtung zum Öffnen einer Greiferklemme eines Greifers einer Webmaschine
EP02758268A EP1402096B1 (fr) 2001-07-05 2002-06-25 Procede et dispositif permettant d'ouvrir la pince d'une griffe d'un metier a tisser

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP02758268A Division EP1402096B1 (fr) 2001-07-05 2002-06-25 Procede et dispositif permettant d'ouvrir la pince d'une griffe d'un metier a tisser
EP02758268.3 Division 2002-06-25

Publications (2)

Publication Number Publication Date
EP1956124A1 EP1956124A1 (fr) 2008-08-13
EP1956124B1 true EP1956124B1 (fr) 2010-10-20

Family

ID=7691939

Family Applications (2)

Application Number Title Priority Date Filing Date
EP02758268A Expired - Lifetime EP1402096B1 (fr) 2001-07-05 2002-06-25 Procede et dispositif permettant d'ouvrir la pince d'une griffe d'un metier a tisser
EP08005257A Expired - Lifetime EP1956124B1 (fr) 2001-07-05 2002-06-25 Procédé et dispositif d'ouverture ou de fermeture d'une griffe d'un métier à tisser

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP02758268A Expired - Lifetime EP1402096B1 (fr) 2001-07-05 2002-06-25 Procede et dispositif permettant d'ouvrir la pince d'une griffe d'un metier a tisser

Country Status (6)

Country Link
US (1) US7044174B2 (fr)
EP (2) EP1402096B1 (fr)
CN (1) CN1630748B (fr)
AT (2) ATE393250T1 (fr)
DE (3) DE10134504A1 (fr)
WO (1) WO2003004746A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE502006002809D1 (de) * 2006-01-06 2009-03-26 Sultex Ag Bringergreifer für eine Greiferwebmaschine
BE1018774A3 (nl) 2009-06-10 2011-08-02 Picanol Nv Grijpereenheid, controlesysteem voor een grijpereenheid en weefmachine.
CN103789909A (zh) * 2012-11-02 2014-05-14 吴江市嘉运纺织整理有限公司 一种织机勾纱器
ITUB20155478A1 (it) * 2015-11-11 2017-05-11 Pezzoli Miria Dispositivo per l?apertura di un elemento di presa di filo di trama di un telaio a pinza, relativo 5 elemento di presa e metodo di apertura di un tale elemento di presa

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH611354A5 (fr) * 1975-04-17 1979-05-31 Dornier Gmbh Lindauer
NL155604B (nl) * 1975-10-06 1978-01-16 Picanol Nv Aandrijfinrichting voor naalden op een naaldgetouw.
DE3812966A1 (de) * 1987-10-02 1989-04-20 Textilma Ag Greiferwebmaschine
JPH07331558A (ja) * 1994-06-06 1995-12-19 Toyota Autom Loom Works Ltd レピア織機における緯入れ方法及び装置
BE1009681A3 (nl) * 1995-10-11 1997-06-03 Picanol Nv Grijperaandrijving voor weefmachines.
JP2000508722A (ja) * 1996-04-19 2000-07-11 ピカノール エヌ．ヴィ． 織機のグリッパのグリッパクランプを開口するための装置
DE29908543U1 (de) 1999-05-14 1999-08-12 Lindauer Dornier Gmbh, 88131 Lindau Steuereinrichtung zur Betätigung des Klemmhebels eines Greifers, insbesondere eines Nehmergreifers in Greiferwebmaschinen
DE10114755A1 (de) * 2001-03-21 2002-09-26 Picanol Nv Nehmergreifer für eine Greiferwebmaschine

Also Published As

Publication number Publication date
EP1402096A1 (fr) 2004-03-31
CN1630748A (zh) 2005-06-22
CN1630748B (zh) 2011-07-06
DE50214728D1 (de) 2010-12-02
DE10134504A1 (de) 2003-01-16
US20040154686A1 (en) 2004-08-12
US7044174B2 (en) 2006-05-16
WO2003004746A1 (fr) 2003-01-16
ATE485412T1 (de) 2010-11-15
EP1402096B1 (fr) 2008-04-23
DE50212152D1 (de) 2008-06-05
EP1956124A1 (fr) 2008-08-13
ATE393250T1 (de) 2008-05-15

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