EP2037023A1 - Fadenklemme für einen Greiferkopf und Verfahren zum Betreiben derselben - Google Patents

Fadenklemme für einen Greiferkopf und Verfahren zum Betreiben derselben Download PDF

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Publication number
EP2037023A1
EP2037023A1 EP08162779A EP08162779A EP2037023A1 EP 2037023 A1 EP2037023 A1 EP 2037023A1 EP 08162779 A EP08162779 A EP 08162779A EP 08162779 A EP08162779 A EP 08162779A EP 2037023 A1 EP2037023 A1 EP 2037023A1
Authority
EP
European Patent Office
Prior art keywords
weft
deflecting element
thread
thread clamp
weft threads
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.)
Withdrawn
Application number
EP08162779A
Other languages
German (de)
English (en)
French (fr)
Inventor
Marius Bachofen
Remo D'incau
Robert Rüegg
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.)
Itema Switzerland Ltd
Original Assignee
Itema Switzerland Ltd
Sultex AG
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 Itema Switzerland Ltd, Sultex AG filed Critical Itema Switzerland Ltd
Priority to EP08162779A priority Critical patent/EP2037023A1/de
Publication of EP2037023A1 publication Critical patent/EP2037023A1/de
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a thread clamp for a rapier head for clamping weft threads in a rapier according to the preamble of claim 1, a rapier head with such a thread clamp and a method for operating such a thread clamp and a rapier with such a thread clamp or with such a rapier head or equipped for Execute such a method.
  • the weft thread is introduced into a shed by means of a gripper gripper fastened to a gripper bar or a flexible belt and taken over by a gripper gripper at a transfer point in the middle part of the shed and conveyed on.
  • the Bringergreifer has the task to pick up the presented weft safely, enter the same in the shed and precisely feed the gripper rapier.
  • Each of the grippers includes a rapier head with a thread clamp to clamp the weft during weft insertion. In automatically clamping, ie passive thread clamps thread takeover takes place by pulling in or out of the weft thread from preset clamping areas of the respective thread clamps.
  • controlled thread clamps can be used in one or both gripper heads, which is actively opened or relieved at the thread takeover the thread clamp of Bringergreifers or that of the gripper rapier is actively closed or loaded.
  • Conventional thread clamps usually comprise a lever as a holding member, which forms a wedge-shaped clamping gap for clamping weft threads with a second holding member, which tapers towards the pivot point of the lever.
  • the clamping force is the weakest at the beginning of the thread clamp and increases towards the inside of the thread clamp. If coarse and fine weft yarns are entered successively, it is especially in automatically clamping thread clamps that the coarse weft yarns that require a larger clamping force are clamped at the entrance of the thread clamp, where the clamping force is low, so that the coarse weft yarns only are kept weak, while the fine weft yarns, which require a lower clamping force, are further drawn into the thread clamp, where they are held accordingly strong. In both cases, it can lead to malfunction by the coarse weft yarns are held too low during the weft insertion, while the fine weft yarns are held too strong when passing to the Holergreifer and can tear.
  • the object of the invention is a thread clamp for a rapier head for clamping weft threads in a rapier, a rapier head with such a thread clamp and a method for operating such a thread clamp and a rapier with such a thread clamp or with such a gripper head or equipped to perform a to provide such method, which allow to enter different weft threads, and in particular a plurality of different weft threads successively or simultaneously, with the same thread clamp.
  • the thread clamp according to the invention for a gripper head for clamping weft threads in a rapier weaving machine comprises a first and a second holding member, which can be pressed against one another in a clamping region in order to hold one or more weft threads.
  • one or more deflecting elements are provided on the thread clamp in order to deflect the weft thread (s) and to increase the holding force, at least one deflecting element being controllable.
  • the at least one deflection may be provided for the at least one deflection occasionally a separate actuator to actuate the deflection, in particular to operate separately from the two holding members, wherein the actuator of the at least one deflecting element may be formed, for example, as a magnetic or piezoelectric actuator.
  • the at least one deflecting element can be controlled when the weft or weft threads are clamped in the thread clamp.
  • the two holding members are automatically clamping and / or formed as a passive clamping device.
  • the at least one deflecting element is designed as a lever arm or arranged on a lever arm.
  • the at least one deflecting element is arranged in the clamping area and, in a further advantageous embodiment variant, laterally of the clamping area.
  • a plurality of controllable deflecting elements for example one in the clamping region and one laterally on one side or on both sides of the clamping region.
  • the two holding members in a clamping area pressed against one another, one or more weft threads held in the clamping area and one or more deflection provided by means of which the weft threads or deflected and the holding force of the thread clamp are increased.
  • at least one deflecting element is controlled to register the weft or weft threads. If required, the at least one controlled deflecting element can be controlled by one shot at a time.
  • the at least one controlled deflection element is withdrawn during the recording and / or transfer of the weft thread or the weft threads, and / or the weft or weft threads are additionally held during the entry by the at least one controlled deflection by this in the Thread course is immersed.
  • the weft thread or wefts are pulled into the clamping region for receiving, held in the clamping region by the holding members pressed against one another and then immersed in the thread pattern by the at least one controlled deflection element.
  • the at least one controlled deflecting element is withdrawn from the course of the thread to transfer the weft or threads to the taker, and then the weft or threads are pulled out of the clamping region arranged in the receiving head.
  • the invention comprises a gripper head, in particular a gripper head of a Bringer- or Holergreifer with a thread clamp according to one of the embodiments described above, and a rapier with a thread clamp according to one of the embodiments described above and / or with a rapier head according to the above description and / or equipped for carrying out a method according to the above description.
  • the thread clamp, the rapier head and the method according to the present invention and the rapier weaving machine according to the invention have the advantage over thread clamps of the prior art that for a larger range of different weft threads, such as for example weft threads with different fineness, different texture or different material, the same thread clamp can be used. This is especially true in the event that several different weft threads are entered simultaneously.
  • the weft or the weft threads during the recording is not hindered or injured by the controllable deflecting elements or because they can be withdrawn from the threadline, and during the entry is / are the weft or the weft threads by the or in the Thread course immersed deflecting additionally held.
  • the or the controllable deflecting elements can be withdrawn at the transfer of the weft thread or the weft threads to the taker rapier so as not to hinder the withdrawal of the same and not to hurt them. If, instead of a conventional, controlled thread clamp, an automatically clamping thread clamp with controllable deflecting element is used, then the force and energy required for the actuation of the deflecting element is lower since no clamping force has to be applied or overcome during the actuation.
  • Fig. 1 shows a section of an embodiment of a rapier loom 20 at the beginning of the weft insertion.
  • the Greiferwebmasche comprises a Bringergreifer with a rapier head 10, a plurality of weft yarns 2, 2 ', 2 ", 2"', which are deducted from a yarn store, not shown, warp yarns 21, a color picker 23 with a plurality Fadenvorlegern 23a to the Bringergreifer a or to submit a plurality of weft threads 2 to the entry, and a reed 24, to strike the or the registered weft threads to a stop edge.
  • the warp threads 21 form between the Riet 24 and the stop edge a shed 22, in which the or the weft threads 2 are registered.
  • the gripper head 10 includes a thread clamp 1 to hold the weft yarns or 2 during the entry.
  • the gripper loom of the embodiment further, in Fig. 1 not shown components include, such as a Holergreifer, sumaneorgane, a drive and / or a controller.
  • Fig. 2 shows an embodiment of a rapier head 10 with a thread clamp for clamping weft threads 2 according to the present Invention in oblique view.
  • the thread clamp of the embodiment comprises a first and a second holding member 3, 4, which are pressed against each other in a clamping region 3a, 4a to hold one or more weft threads.
  • one or more deflecting elements 7 are provided on the thread clamp in order to deflect the weft threads 2 and to increase the holding force, wherein at least one deflecting element 7 is controllable.
  • the first and second holding member 3, 4 and the at least one deflecting element 7 can optionally be designed as lever arms, which can be rotatably mounted about a rotation axis 5.
  • the gripper head 10 may, if necessary, a lower part 11, an upper part 12 and on one side or on both sides each include a side part 14.
  • a side part 14 With regard to details of the structure of the thread clamp and possible embodiments, reference is made to the following description of the detailed views in the FIGS. 3, 3A, 3B . 4, 4A, 4B directed.
  • Fig. 3 shows a detailed view of the thread clamp of the embodiment of Fig. 2 and the FIGS. 3A and 3B each show a section through the embodiment of Fig. 2 during weft insertion and during weft picking or transfer.
  • the thread clamp 1 of the embodiment comprises a first and a second holding member 3, 4, which are pressed against each other in a clamping region 3a, 4a to hold one or more weft threads 2.
  • one or more deflecting elements 7 are provided on the thread clamp in order to deflect the weft threads 2 and to increase the holding force, wherein at least one deflecting element 7 is controllable.
  • a separate actuator may occasionally be provided for the at least one deflecting element 7 in order to actuate the deflecting element, in particular separately from the two holding members 3, 4, the actuator of the at least one deflecting element being designed, for example, as a magnetic piezoelectric actuator can.
  • the actuator may for example contain an electromagnet 8, which cooperates with a magnetizable part of the deflection element 7.
  • the magnetic actuator may also contain a magnetizable part, such as a ferromagnetic part or a permanent magnet 8, which are connected to the deflecting element 7, and which cooperate with a further magnetizable part, which can be arranged outside the gripper head, for example in a gripper band guide of rapier loom.
  • the further magnetizable part which is arranged occasionally in the gripper band guide, be designed as a permanent magnet or as a core or yoke of an electromagnet. Thanks to its own actuator, the at least one deflecting element 7 can be actuated and / or controlled when the weft or weft threads 2 are clamped in the thread clamp 1.
  • the at least one deflecting element 7 is designed as a lever arm or arranged on a lever arm.
  • the first and second holding member 3, 4 and the at least one deflecting element 7 either as a lever arm, for example, as in Fig. 3 shown as a lever arm of a two-armed lever, form, which can be rotatably mounted about a rotation axis 5.
  • the two holding members 3, 4 are automatically clamping and / or formed as a passive clamping device.
  • the first and second holding member 3, 4 and the at least one deflecting element 7 each to be resiliently configured or stored or to be acted upon by a spring force in order to press the holding members against one another and / or the deflecting element in a defined position hold, for example, in a position in which the one or more weft threads are deflected, or in which the deflecting element releases the thread path.
  • the second support member 4 is as in FIG Fig.
  • a plurality of controllable deflecting elements which can be arranged on both sides of the clamping region or optionally in the clamping region and laterally on one side or on both sides of the clamping region.
  • one or more non-controllable or fixed deflecting elements 12a may additionally be provided in order to deflect the weft thread (s) and optionally to increase the holding force.
  • a fixed deflecting element 12a may be formed on the upper part of the associated rapier head, which additionally deflects the course of the thread.
  • Fig. 4 shows a detailed view of a second embodiment of a thread clamp according to the present invention and the FIGS. 4A and 4B each show a section through the embodiment of Fig. 4 during weft insertion and during weft picking or transfer.
  • the thread clamp 1 of the second embodiment comprises a first and a second holding member 3, 4, which are pressed against each other in a clamping region 3a, 4a to hold one or more weft yarns 2.
  • one or more deflecting elements 7 ' are provided on the thread clamp in order to deflect the weft thread or threads 2 and to increase the holding force, wherein at least one deflecting element 7' is controllable.
  • the deflecting element 7 ' is arranged in the second embodiment in the clamping region 3a, 4a of the holding members 3, 4, for example, with respect to the course of the thread centrally in the clamping area.
  • the respective holding member be provided in the clamping area a passage or recess into which the at least one deflecting element 7 'can be immersed in order to deflect the weft or the weft threads.
  • the deflecting element 7 'in the longitudinal direction can be made substantially symmetrical or at least partially symmetrical.
  • the deflecting element can be designed, for example, as a two-armed lever, which can be designed as a frame, for example, in a central part, so that the deflecting element can be mounted on both sides of the first and / or second holding member 3, 4.
  • the symmetrical or at least partially symmetrical configuration of the deflecting element 7 ' is particularly advantageous if the same as in the Figures 4, 4A and 4B shown, approximately centrally with respect to the clamping portion 3a, 4a of the holding members is arranged.
  • the at least one controlled deflecting element 7, 7 ' as in FIGS FIGS. 3B and 4B shown, withdrawn, and / or the weft or the weft threads are during the entry through the at least one controlled deflecting element additionally held by this, as in the FIGS. 3A and 4A shown immersed in the threadline.
  • the at least one controlled deflecting element 7, 7 ' is withdrawn from the course of the thread to transfer the weft thread or threads 2 to the taker rapier, and then the weft thread or threads are pulled out of the clamping region 3a, 4a arranged in the rapier head.
  • the weft yarns or 2 are pulled for receiving in the clamping region 3a, 4a, held by the holding members 3, 4 pressed against each other in the clamping area and then immersed the at least one controlled deflecting element 7, 7 'in the thread path.
  • the invention comprises a rapier loom with a thread clamp 1 according to one of the above-described embodiments and / or with a rapier head 10 according to the above description and / or equipped for carrying out a method according to the above description.
  • the thread clamp, the rapier head and the method according to the above description have the advantage over thread clamps of the prior art that for a comparatively wide selection of different weft threads, such as weft threads with different fineness, different texture or made of different material, the same thread clamp used can be. This is especially true in the event that several different weft threads are entered sequentially or simultaneously. If the holding members are designed as a passive clamping device, a higher holding force can be achieved thanks to the controlled deflection, wherein the force and energy required to operate the deflecting element is less than the force and energy required to operate a conventional controlled thread clamp.
EP08162779A 2007-09-12 2008-08-21 Fadenklemme für einen Greiferkopf und Verfahren zum Betreiben derselben Withdrawn EP2037023A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08162779A EP2037023A1 (de) 2007-09-12 2008-08-21 Fadenklemme für einen Greiferkopf und Verfahren zum Betreiben derselben

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07116269 2007-09-12
EP08162779A EP2037023A1 (de) 2007-09-12 2008-08-21 Fadenklemme für einen Greiferkopf und Verfahren zum Betreiben derselben

Publications (1)

Publication Number Publication Date
EP2037023A1 true EP2037023A1 (de) 2009-03-18

Family

ID=39055710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08162779A Withdrawn EP2037023A1 (de) 2007-09-12 2008-08-21 Fadenklemme für einen Greiferkopf und Verfahren zum Betreiben derselben

Country Status (4)

Country Link
US (1) US20090065090A1 (ja)
EP (1) EP2037023A1 (ja)
JP (1) JP2009068159A (ja)
CN (1) CN101387036A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009037127A1 (de) * 2009-08-11 2011-02-17 Lindauer Dornier Gmbh Greiferkopf einer Webmaschine
US8550123B2 (en) 2009-08-07 2013-10-08 Lindauer Dornier Gesellschaft Mbh Device for transferring a band-shaped weft material

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102459733B (zh) * 2009-06-10 2013-11-27 林道尔·多尼尔有限责任公司 用于在剑杆织机上引入纬纱的装置和方法
CN105220318B (zh) * 2015-11-19 2018-01-05 长乐力天针纺有限公司 一种纺织剑头送纬剑夹持装置
CN105506838B (zh) * 2015-12-07 2017-04-26 苏州经贸职业技术学院 一种剑杆织机的传剑带导轨装置
IT201700066823A1 (it) * 2017-06-15 2018-12-15 Itema Spa Sistema perfezionato di presa/rilascio del filo di trama in un telaio tessile a proiettile

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5007463A (en) * 1988-08-19 1991-04-16 Nuovopignone-Industrie Meccaniche E Fonderia, S.P.A. Weft clamping system for inserter rapier
EP0571025A1 (en) * 1992-05-22 1993-11-24 NUOVOPIGNONE INDUSTRIE MECCANICHE E FONDERIA S.p.A. Improved taker gripper for loom use
EP0576074A1 (en) * 1992-06-23 1993-12-29 NUOVOPIGNONE INDUSTRIE MECCANICHE E FONDERIA S.p.A. In a taker gripper for loom use
EP0624671A1 (de) * 1993-05-12 1994-11-17 Sulzer RàœTi Ag Fadenhalter für einen Bringergreifer und Greiferwebmaschine mit Fadenhalter
EP0906461A1 (de) * 1996-06-07 1999-04-07 Picanol N.V. Gebergreifer für eine greiferwebmaschine
WO1999018274A1 (de) * 1997-10-03 1999-04-15 Picanol N.V. Gebergreifer für eine greiferwebmaschine
US6431223B1 (en) * 1998-11-17 2002-08-13 Sulzer Tessile Srl Bringer gripper for looms without shuttles
US20050284533A1 (en) * 2002-09-20 2005-12-29 Eddy Verclyte Feed rapier for a rapier loom

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0864679B1 (de) * 1997-03-14 2002-12-18 Sulzer Textil AG Greiferklemme für einen Bringergreifer und Webmaschine mit Greiferklemme
ATE410534T1 (de) * 2002-02-25 2008-10-15 Gividi Italia Spa Fadenklemme für einen greifer in einer greiferwebmaschine
US7543610B2 (en) * 2006-06-16 2009-06-09 Sultex Ag Thread clamp for a rapier head
DE502006002809D1 (de) * 2006-01-06 2009-03-26 Sultex Ag Bringergreifer für eine Greiferwebmaschine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5007463A (en) * 1988-08-19 1991-04-16 Nuovopignone-Industrie Meccaniche E Fonderia, S.P.A. Weft clamping system for inserter rapier
EP0571025A1 (en) * 1992-05-22 1993-11-24 NUOVOPIGNONE INDUSTRIE MECCANICHE E FONDERIA S.p.A. Improved taker gripper for loom use
EP0576074A1 (en) * 1992-06-23 1993-12-29 NUOVOPIGNONE INDUSTRIE MECCANICHE E FONDERIA S.p.A. In a taker gripper for loom use
EP0624671A1 (de) * 1993-05-12 1994-11-17 Sulzer RàœTi Ag Fadenhalter für einen Bringergreifer und Greiferwebmaschine mit Fadenhalter
EP0906461A1 (de) * 1996-06-07 1999-04-07 Picanol N.V. Gebergreifer für eine greiferwebmaschine
WO1999018274A1 (de) * 1997-10-03 1999-04-15 Picanol N.V. Gebergreifer für eine greiferwebmaschine
US6431223B1 (en) * 1998-11-17 2002-08-13 Sulzer Tessile Srl Bringer gripper for looms without shuttles
US20050284533A1 (en) * 2002-09-20 2005-12-29 Eddy Verclyte Feed rapier for a rapier loom

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8550123B2 (en) 2009-08-07 2013-10-08 Lindauer Dornier Gesellschaft Mbh Device for transferring a band-shaped weft material
DE102009037127A1 (de) * 2009-08-11 2011-02-17 Lindauer Dornier Gmbh Greiferkopf einer Webmaschine
WO2011018062A1 (de) 2009-08-11 2011-02-17 Lindauer Dornier Gesellschaft Mbh Greiferkopf einer webmaschine
US8656962B2 (en) 2009-08-11 2014-02-25 Lindauer Dornier Gesellschaft Mbh Gripper head of a weaving machine

Also Published As

Publication number Publication date
JP2009068159A (ja) 2009-04-02
CN101387036A (zh) 2009-03-18
US20090065090A1 (en) 2009-03-12

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