EP1402096A1 - Procede et dispositif permettant d'ouvrir la pince d'une griffe d'un metier a tisser - Google Patents

Procede et dispositif permettant d'ouvrir la pince d'une griffe d'un metier a tisser

Info

Publication number
EP1402096A1
EP1402096A1 EP02758268A EP02758268A EP1402096A1 EP 1402096 A1 EP1402096 A1 EP 1402096A1 EP 02758268 A EP02758268 A EP 02758268A EP 02758268 A EP02758268 A EP 02758268A EP 1402096 A1 EP1402096 A1 EP 1402096A1
Authority
EP
European Patent Office
Prior art keywords
gripper
stop element
drive
clamp
opening
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
EP02758268A
Other languages
German (de)
English (en)
Other versions
EP1402096B1 (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
Priority to EP08005257A priority Critical patent/EP1956124B1/fr
Publication of EP1402096A1 publication Critical patent/EP1402096A1/fr
Application granted granted Critical
Publication of EP1402096B1 publication Critical patent/EP1402096B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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 method for opening a gripper clamp of a gripper of a weaving machine, in which a stop part of the gripper clamp runs against a stop element that is adjustable by means of a motor drive, and a device for carrying out the method.
  • the opening and closing of the shed as well as the position of the gripper outside of the shed change significantly with respect to the angular position of the main drive shaft during slow speed and normal weaving.
  • the invention has for its object to provide a method of the type mentioned, which allows early opening in weaving machines operating in normal operation at high speeds and a very late opening of the gripper clamp in operation with slow speed. This object is achieved in that during a slow running of the weaving machine the stop element is brought into the path of movement of the stop part of the rapier clamp and is delivered to this stop part while the stop part is already in the area of the stop element.
  • the position of the stop element with respect to the direction of the movement path of the rapier is no longer decisive during the slow running of the weaving machine, but rather the point in time at which the stop element is delivered to the stop part of the rapier clamp. At this point, the stop part may have moved a relatively large distance in the longitudinal direction of the stop element.
  • Such positive opening of the gripper clamp in the manner of actuating a switch is known in principle.
  • a pivotable stop element fastened at a predetermined point is actuated by a drive at a predetermined opening time in order to determine the opening time individually for each weft thread inserted.
  • a drive with an electric motor is provided.
  • this method creates difficulties for weaving machines that work very quickly in normal operation.
  • the position of the gripper is detected during slow speed and the stop element is delivered to the stop part 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 belt carrying the gripper.
  • a device for opening a gripper clamp of a gripper of a weaving machine in order to achieve the object, in which means for detecting the position of the gripper are provided, which are connected to a control unit which, during the slow running of the weaving machine, the stop element brings a predetermined position of the gripper into the path of movement of the stop part of the gripper clamp and delivers the stop part. It is furthermore expediently provided that separate electromotive drives are provided for positioning the stop element in the longitudinal direction of the movement path of the gripper and for delivery transverse to the movement path.
  • the weaving machine can be operated in such a way that during slow speed the opening is controlled exclusively by the electromotive drive that moves the stop element transversely to the movement path of the gripper, while during normal operation the stop element is positioned in the longitudinal direction of the movement path of the gripper in such a way that due to the position is opened at a suitable time, which depends on the speed and other web parameters.
  • FIG. 1 shows a schematic representation of a perspective view of a rapier weaving machine
  • Fig. 3 is a view of a device for opening the gripper in a position before performing the opening of the gripper and
  • Fig. 4 shows the device according to Fig. 3 during the opening of the gripper.
  • the rapier weaving machine shown in FIGS. 1 and 2 contains two rapier belts 1 which each carry a rapier 2 and 3 at their free ends.
  • the gripper 2 is the so-called master gripper or bringer gripper, while the gripper 3 is a slave gripper.
  • the donor gripper 2 takes over a weft thread 4 on the entry side of the shed formed from warp threads 12, which is presented to it by means of a presentation device 19.
  • the weft thread 4 is located on a supply spool 17, from which a weft thread to be inserted is drawn off and wound onto a prewinder 18 before it is inserted into the shed.
  • a plurality of bobbins 17 and a plurality of prewinding devices 18 are usually provided, the weft threads of which are presented to the gripper 2 by the device for presenting 19 in a preselectable pattern.
  • the gripper belts 1 are driven by means of drive wheels 6, around which they are guided by means of guides 7.
  • the gripper belts 1 move in and out of the shed so that the master gripper 2 and the slave gripper 3 meet in the middle of the shed.
  • the taker gripper 3 then takes over the weft thread and pulls it to the opposite side.
  • the inserted weft thread is then attached to the fabric 13 by means of a reed 11.
  • 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 heald frames 9.
  • the shed is changed.
  • the slave gripper 3 also has a thread clamp with which the weft thread is held during transport and which is opened when the slave gripper 3 has reached the opposite side.
  • the closing of the donor gripper 2 when picking up a weft thread and when entering the shed can be controlled by means of a device 5.
  • the opening of the gripper 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 explained in more detail for a slave gripper 3 with reference to FIGS. 3 and 4.
  • the slave gripper 3 shown schematically in FIGS. 3 and 4 is attached to the end of a gripper belt 1. It has a hook-shaped end, in the area of which a gripper clamp 20 is provided for a weft thread 4.
  • the gripper clamp 20 is formed by one leg of the hook and an arm of a two-armed stop part 21 which can be pivoted about an axis 22.
  • the stop part 21 protrudes from the slave gripper 3 with an angled extension. If this approach is pressed into the slave gripper 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 slave gripper 3.
  • the stop element 24 is guided in a cross-slide-like guide 25, which is fixedly attached to the weaving machine, in two directions aligned perpendicular to one another.
  • One direction extends in the direction of the double arrow B, ie parallel to the movement path of the slave gripper 3 and its gripper belt 1.
  • the other direction extends in the direction of device of the double arrow C, ie transverse to the path of movement of the slave gripper 3 and the gripper belt 1.
  • the stop element 24 is adjustable in the direction of the double arrow B by means of a drive 26 which contains an electric motor, for example a servomotor or stepper motor, of which only the motor shaft 27 is shown.
  • This motor shaft 27 is connected via a crank mechanism 28, 29 to the stop element 24, which can be moved back and forth by means of the drive 26 in the direction of the double arrow B, i.e. is adjustable in the longitudinal direction of the movement path of the slave gripper 3.
  • the stop element 24 is also adjustable in the direction of the double arrow C by means of an electric motor drive 30.
  • the drive 30 contains an electric motor, for example 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 electromotive drive 30.
  • the stop element When the weaving machine is operating at normal speed, the stop element is in the position shown in FIG. 4, ie it lies in the path of movement of the stop part 21, so that the gripper clamp 20 of the slave gripper is opened when the stop part 21 approaches the stop element 24 starts.
  • the position of the stop element 24 in the longitudinal direction of the movement path of the gripper 3 and the gripper belt 1 and thus the distance to the end of the shed is set by a controller 14 via the drive 26 (FIG. 1).
  • the position depends on weaving parameters such as weaving speed, material and thickness of the weft threads or the like.
  • the position on shot f be adapted to the different properties and also to different speeds for the different weft threads.
  • the values for this are entered into the control unit 14 by means of an input unit, not shown, which, for example, selects the suitable positions in accordance with a program stored in a memory.
  • the drive 30 is only actuated in normal operation when the slave gripper 3 reverses its movement again after reaching its extreme end position and is inserted into the shed. So that the stop part 21 does not run against the stop element 24 in this direction, the stop element 24 can be brought briefly into the position according to FIG. 3 by means of the drive 30.
  • 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 in this case should take place as late as possible, ie if the slave gripper 3 has already moved far out of the shed, is "switched" by means of the drive 30, which brings about a positive opening.
  • the stop element 24 is brought into the position shown in FIG. 3 and only then moved into the position according to FIG. 4 by means of the drive 30 when it is desired to open the gripper clamp 20.
  • This opening then takes place as a function of the position of the slave gripper 3.
  • means are provided for detecting the position of the slave gripper 3 and entering it into the control unit 14, which then opens the gripper clamp 20 at a suitable time.
  • the opening is designed for a predetermined angular position of the main shaft.
  • an angle sensor can be attached to the main shaft in a manner not shown, which is connected to the control unit. Since the gripper belts 1 and thus also their drive wheels 6 run synchronously with the main shaft, it is also possible to position the grippers 2, 3 in relation to the angular position of the main shaft by means of winches. to detect kelgebern 35, which are arranged on the drive wheels 6 and connected to the control unit 14. An angle encoder 35 on one of the drive wheels 6 is usually sufficient.
  • stop element 24 which can be pivoted about its articulation point on the crank drive 26 in order to carry out a “switching” in order to open the gripper clamp 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Advancing Webs (AREA)
  • Manipulator (AREA)
EP02758268A 2001-07-05 2002-06-25 Procede et dispositif permettant d'ouvrir la pince d'une griffe d'un metier a tisser Expired - Lifetime EP1402096B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08005257A EP1956124B1 (fr) 2001-07-05 2002-06-25 Procédé et dispositif d'ouverture ou de fermeture d'une griffe d'un métier à tisser

Applications Claiming Priority (3)

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
DE10134504 2001-07-05
PCT/EP2002/006998 WO2003004746A1 (fr) 2001-07-05 2002-06-25 Procede et dispositif permettant d'ouvrir la pince d'une griffe d'un metier a tisser

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP08005257A Division EP1956124B1 (fr) 2001-07-05 2002-06-25 Procédé et dispositif d'ouverture ou de fermeture d'une griffe d'un métier à tisser

Publications (2)

Publication Number Publication Date
EP1402096A1 true EP1402096A1 (fr) 2004-03-31
EP1402096B1 EP1402096B1 (fr) 2008-04-23

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 After (1)

Application Number Title Priority Date Filing Date
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

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
EP1806443B1 (fr) * 2006-01-06 2009-02-11 Sultex AG Pince d'amenée pour métier à tisser à pince
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.
CN1216586A (zh) * 1996-04-19 1999-05-12 皮克诺尔公司 一种织机的片梭的片梭夹钳的打开装置
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03004746A1 *

Also Published As

Publication number Publication date
DE10134504A1 (de) 2003-01-16
EP1956124B1 (fr) 2010-10-20
US7044174B2 (en) 2006-05-16
WO2003004746A1 (fr) 2003-01-16
CN1630748A (zh) 2005-06-22
ATE393250T1 (de) 2008-05-15
DE50212152D1 (de) 2008-06-05
EP1402096B1 (fr) 2008-04-23
DE50214728D1 (de) 2010-12-02
ATE485412T1 (de) 2010-11-15
US20040154686A1 (en) 2004-08-12
CN1630748B (zh) 2011-07-06
EP1956124A1 (fr) 2008-08-13

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