US20090065090A1 - Thread Clamp for a Rapier Head and Method for the Operation of the Same - Google Patents

Thread Clamp for a Rapier Head and Method for the Operation of the Same Download PDF

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Publication number
US20090065090A1
US20090065090A1 US12/209,178 US20917808A US2009065090A1 US 20090065090 A1 US20090065090 A1 US 20090065090A1 US 20917808 A US20917808 A US 20917808A US 2009065090 A1 US2009065090 A1 US 2009065090A1
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US
United States
Prior art keywords
thread
weft
threads
deflection element
accordance
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.)
Abandoned
Application number
US12/209,178
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English (en)
Inventor
Marius Bachofen
Remo D'Incau
Robert Ruegg
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
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 Sultex AG filed Critical Sultex AG
Assigned to SULTEX AG reassignment SULTEX AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: D'INCAU, REMO, BACHOFEN, MARIUS, RUEGG, ROBERT
Publication of US20090065090A1 publication Critical patent/US20090065090A1/en
Abandoned 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 the firm clamping of weft threads in a rapier weaving machine in accordance with the preamble of claim 1 , to a rapier head having such a thread clamp and to a method for the operation of such a thread clamp as well as to a rapier weaving machine having such a thread clamp or with such a rapier head or equipped to carry out such a method.
  • the weft thread is inserted into a shed by means of a bringer rapier secured to a rapier rod or to a flexible tape and is taken over and transported further by a taker rapier at a transfer point in the central part of the shed.
  • the bringer rapier has the task of reliably taking up the presented weft thread, of inserting the same into the shed and precisely bringing it to the taker rapier.
  • Each of the rapiers includes a rapier head with a thread clamp in order to firmly clamp the weft thread during the weft insertion. With automatically clamping thread clamps, i.e.
  • the thread take-over takes place by pulling the weft thread into or pulling it out of preset clamping regions of the respective thread clamp.
  • the thread clamp of the bringer rapier being actively opened or relieved whereas that of the taker rapier is actively closed or loaded.
  • Customary thread clamps mainly include a lever as a holding member, which, together with a second holding member, forms a wedge-like clamping gap for the firm clamping of weft threads, with the clamping gap tapering towards the point of rotation of the lever.
  • the clamping force is weakest at the inlet to the thread clamp and now increases towards the interior of the thread clamp.
  • the thread presenter does not permit a controlled sequence of the weft threads. If, for example, during the take-up of the weft threads, first a thicker weft thread and then a thinner weft thread arises, so that the clamping gap, which is mainly made resilient, is dilated additionally by the thick weft thread and then the danger exists that the subsequently taken up thinner weft thread is no longer adequately held in the clamping gap and becomes lost.
  • the object of the invention is to make available a thread clamp for a rapier head for the firm clamping of weft threads in a rapier weaving machine, a rapier head having such a thread clamp and a method for the operation of such a thread clamp, as well as a rapier weaving machine with such a thread clamp, or with such a rapier head or equipped to carry out a method of this kind, which permit different weft threads and in particular also a plurality of different weft threads to be inserted one after the other or simultaneously with the same thread clamp.
  • the thread clamp in accordance with the invention for a rapier head for the firm clamping of weft threads in a rapier weaving machine includes first and second holding members which can be pressed towards one an-other in a clamping region in order to hold one or more weft threads.
  • one or more deflection elements are provided at the thread clamp in order to deflect the weft thread or threads and to increase the holding force, with at least one deflection element being controllable.
  • the at least one deflection element can, if required, be pro-vided with its own actuator in order to actuate the deflection element, in particular separately from the two holding members.
  • the actuator of the at least one deflection element can be made, for example, as a magnetic or piezo-electric actuator.
  • the at least one deflection element can advantageously be controlled when the weft thread or threads are clamped in the thread clamp.
  • the two holding members are made automatically clamping and/or designed as a passive clamping device.
  • the at least one deflection element is formed as a lever arm or arranged on a lever arm.
  • the at least one deflection element is arranged in the clamping region and in a further advantageous variant to the side of the clamping region.
  • a plurality of controllable deflection elements for example one in the clamping region and respectively at one side or at both sides of the clamping region.
  • the two holding members are pressed to-wards one another in a clamping region, one or more weft threads are held in the clamping region and one or more deflection elements are provided by means of which the weft thread or threads is/are deflected and the holding force of the thread clamp is increased.
  • at least one deflection element is con-trolled. If required the at least one controlled deflection element can be controlled for each individual weft insertion.
  • the at least one controlled deflection element can be retracted and/or the weft thread or threads can be additionally held during the insertion by means of the at least one controlled deflection element in that it dips into the path of the thread.
  • the weft thread or threads are pulled into the clamping region for reception, are held in the clamping region by the holding members which are pressed towards one another and subsequently the at least one controlled deflection element is dipped into the path of the thread.
  • the at least one controlled deflection element is withdrawn from the path of the thread and the weft thread or threads are subsequently drawn out of the clamping region arranged in the bringer rapier head.
  • the invention relates to a rapier head, in particular to a rapier head of a bringer or taker rapier having a thread clamp in accordance with one of the above-described variants and also to a rapier weaving ma-chine having a thread clamp in accordance with one of the above-described embodiments and/or with a rapier head in accordance with the above description and/or equipped to carry out the method in accordance with the above description.
  • the thread clamp, the rapier head and the method in accordance with the present invention and also the rapier weaving machine in accordance with the present invention have the advantage in comparison to the thread clamps from the prior art that the same thread clamp can be used for a large range of different weft threads such as for example weft threads with different fineness, different texture or of different materials. The same applies to the case in which a plurality of different weft threads are to be inserted simultaneously.
  • the weft thread or threads are not hindered or injured during the take-up by the controllable deflection element or elements, since these can be withdrawn from the path of the thread and, during the insertion, the weft thread or threads is or are additionally held by the deflection element or elements which have dipped into the path of the thread. If required the controlled deflection element or the controlled deflection elements can be withdrawn during the transfer of the weft thread or threads to the taker rapier, in order not to hinder the pull-ing out of the same or not to injure them.
  • FIG. 1 a section of an embodiment of a rapier weaving ma-chine at the start of the weft insertion
  • FIG. 2 an embodiment of a rapier head having a thread clamp in accordance with the present invention in perspective view
  • FIG. 3 a detailed view of the thread clamp from the embodiment of FIG. 2 .
  • FIGS. 3A , 3 B in each case a section through the embodiment of FIG. 2 during the weft insertion and during the weft thread take-up or transfer,
  • FIG. 4 a detailed view of a second embodiment of a thread clamp in accordance with the present invention
  • FIGS. 4A , B in each case a section through the embodiment of FIG. 4 during the weft insertion and during the weft thread take-up or transfer.
  • FIG. 1 shows a section of an embodiment of a rapier weaving machine 20 at the start of the weft insertion.
  • the rapier weaving machine includes a bringer rapier having a rapier head 10 , a plurality of weft threads 2 , 2 ′, 2 ′′, 2 ′′′ which are drawn off from a not illustrated thread store, warp threads 21 , a colour selector 23 having a plurality of thread presenters 23 a in order to present one or more weft threads 2 to the bringer rapier for insertion and a reed 24 in order to beat up the inserted weft thread or threads at a beat-up or cloth edge.
  • the warp threads 21 form a shed 22 between the reed 24 and the beat-up edge into which the weft thread or threads 2 are inserted.
  • the rapier head 10 includes a thread clamp 1 in order to firmly hold the weft thread or threads 2 during the insertion.
  • the rapier weaving machine of the embodiment can have further components which are not shown in FIG. 1 such as for example a taker rapier, shed forming members, a drive and/or a control.
  • FIG. 2 shows an embodiment of a rapier head 10 having a thread clamp for the firm clamping of weft threads 2 in accordance with the present invention in a perspective view.
  • the thread clamp of the embodiment includes a first and a second holding member 3 , 4 which can be pressed towards one another in a clamping region 3 a , 4 a in order to hold one or more weft threads.
  • one or more deflection elements 7 are provided at the thread clamp in order to deflect the weft thread or threads 2 and to increase the holding force, with at least one deflection element 7 being controllable.
  • the first and second holding members 3 , 4 and the at least one deflection element 7 can optionally be formed as lever arms which can be rotatable about an axis of rotation 5 .
  • the rapier head 10 can, if required, contain a lower part 11 , an upper part 12 and in each case a side part 14 on one side or on both sides. Having regard to details relating to the construction of the thread clamp and possible variants reference is made to the following description of the detailed views in FIGS. 3 , 3 A, 3 B, 4 , 4 A, 4 B.
  • FIG. 3 shows a detailed view of the thread clamp from the embodiment of FIG. 2 and FIGS. 3A and 3B each show a section through the embodiment of FIG. 2 during the weft insertion and during the weft thread take-up or transfer.
  • the thread clamp 1 of the embodiment includes a first and a second holding member 3 , 4 which can be pressed towards one another in a clamping region 3 a , 4 a in order to hold one or more weft threads 2 .
  • one or more deflection elements 7 are provided at the thread clamp in order to deflect the weft thread or threads 2 and to increase the holding force, with at least one deflection element 7 being controllable.
  • the at least one deflection element 7 can, if required, be provided with its own actuator in order to actuate the deflection element, in particular actuate it separately from the two holding members 3 , 4 , with the actuator of the at least one deflection element for example being able to be constructed as a magnetic of piezo-electric actuator.
  • the actuator can for example contain an electromagnet 8 which cooperates with a magnetizable part of the deflection element 7 .
  • the magnetic actuator can however also contain a magnetizable part, such as for example a ferro-magnetic part or a permanent magnet 8 which are connected to the deflection element 7 and which cooperate with a further magnetizable part which can be arranged outside of the rapier head, for example in a rapier tape guide of the rapier weaving machine.
  • the further magnetizable part which is—if required—arranged in the rapier tape guide, can be designed as a permanent magnet or as the core or yoke of an electromagnet. Thanks to its own actuator the at least one deflection element 7 can be actuated and/or controlled when the weft thread or threads 2 are clamped in the thread clamp 1 .
  • the at least one deflection element 7 is formed as a lever arm or arranged on a lever arm.
  • the first and the second holding members 3 , 4 and the at least one deflection element 7 in each case optionally as a lever arm, for example as shown in FIG. 3 , as the lever arm of a two arm lever which can be pivotable about its axis rotation 5 .
  • the two holding members 3 , 4 are designed as an automatically clamping device and/or as a passive clamping device.
  • first and second holding members 3 , 4 and the at least one deflection element 7 resilient or to journal them resiliently or to apply a spring force to them in order to press the holding members toward one another and/or to keep the deflection element in a defined position, for example in a position in which the weft thread or threads can be deflected or in which the deflection element frees the path of the thread.
  • the second holding member 4 is for example as shown in FIG. 3 typically acted on by the pressure of a spring 6 .
  • the deflection element in order to press the holding members towards one another and/or the deflection element is for example acted on by the pressure or tension of a spring 6 . 2 . It is, however, also possible, if required, to control the contact pressure of the two holding members 3 , 4 in that an additional actuator is provided for this in order to open and/or to close and/or to relief and/or to load the clamping region 3 a , 4 a of the two holding members.
  • the at least one deflection element 7 is, as is shown in FIGS. 3 , 3 A and 3 B arranged at the side of the clamping region 3 a , 4 a .
  • a plurality of controllable deflection elements which for example can be arranged on both sides of the clamping region or optionally in the clamping region and at the side at one side or on both sides of the clamping region.
  • one or more non-controllable or fixed deflection elements 12 a can additionally be provided in order to deflect the weft thread or threads and optionally to increase the holding force.
  • a fixed deflection element 12 a can be formed at the upper part of the associated rapier head which additionally deflects the path of the thread.
  • FIG. 4 shows a detailed view of a second embodiment of a thread clamp in accordance with the present invention and the FIGS. 4A and 4B respectively show a section through the embodiment of FIG. 4 during the weft insertion and during the weft thread take-up or transfer.
  • the thread clamp 1 of the second embodiment includes a first and second holding member 3 , 4 which are pressed towards one another in a clamping region 3 a , 4 a in order to hold one or more weft threads 2 .
  • one or more deflection elements 7 ′ are provided at the thread clamp in order to deflect the weft thread or threads 2 and to increase the holding force, with at least one deflection element 7 ′ being controllable.
  • FIGS. 4 , 4 A and 4 B The second embodiment which is shown in FIGS. 4 , 4 A and 4 B is distinguished from that shown in FIGS. 3 , 3 A and 3 B only through the arrangement and design of the at least one controlled deflection element 7 ′.
  • FIGS. 4 , 4 A and 4 B With regard to details for the construction of the thread clamp and possible variants reference is made to the above description of the first embodiment which was explained in conjunction with the description of FIGS. 3 , 3 A and 3 B.
  • the deflection element 7 ′ is arranged in the second embodiment in the clamping region 3 a , 4 a of the holding members 3 , 4 , for example centrally in the clamping region with respect to the path of the thread. If required, a passage or cut-out can be provided in the respective holding member in the clamping region into which the at least one deflection element 7 ′ can be dipped in order to deflect the weft thread or threads.
  • a plurality of controllable deflection elements which, for example, can be arranged on both sides of the clamping region and optionally in the clamping region and at the side on one side or on both sides of the clamping region.
  • the deflection element 7 ′ can be made largely symmetrical and at least partly symmetrical in the longitudinal direction.
  • the deflection element can for example be designed as a two-armed lever which can for example be of frame-like shape in a middle part so that the deflection element can be mounted on both sides of the first and/or second holding members 3 , 4 .
  • the symmetrical or at least partly symmetrical design of the deflection element 7 ′ is particularly advantageous when it, as shown in FIGS. 4 , 4 A and 4 B, is arranged approximately at the centre with respect to the clamping region 3 a , 4 a of the holding members.
  • the at least one controlled deflection element 7 , 7 ′ is, as shown in FIGS. 3B and 4B , withdrawn and/or the weft thread or threads is/are additionally held during the insertion through the at least one controlled deflection element in that the latter, as shown in FIGS. 3A and 4A dips into the path of the thread.
  • the at least one controlled deflection element 7 , 7 ′ is withdrawn from the path of the thread for the transfer of the weft thread or threads 2 to the taker rapier and finally the weft thread or threads are drawn out of the clamping region 3 a , 4 a arranged in the bringer rapier head.
  • the weft thread or threads 2 are drawn for take-up into the clamping region 3 a , 4 a , are held by the holding members 3 , 4 which are pressed towards each other in the clamping region and finally the at least one controlled deflection element 7 , 7 ′ is dipped into the path of the thread.
  • the invention includes a rapier weaving machine having a thread clamp 1 in accordance with one of the above-described variants and/or with a rapier head 10 in accordance with the above description and/or equipped for carrying out a method in accordance with the above description.
  • the thread clamp, the rapier head and the method in accordance with the above-description have the advantage, in comparison to thread clamps from the prior art, that the same thread clamp can be used for a comparatively broad selection of different weft threads such as for example weft threads with different fineness, different texture or of different materials.
  • the holding members are formed as a passive clamping device then, thanks to the controlled deflection element, a higher holding force can be achieved, with the power and energy consumption for the actuation of the deflection element being smaller than the power and energy consumption for the actuation of a customary controlled thread clamp.
US12/209,178 2007-09-12 2008-09-11 Thread Clamp for a Rapier Head and Method for the Operation of the Same Abandoned US20090065090A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07116269.7 2007-09-12
EP07116269 2007-09-12

Publications (1)

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US20090065090A1 true US20090065090A1 (en) 2009-03-12

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US12/209,178 Abandoned US20090065090A1 (en) 2007-09-12 2008-09-11 Thread Clamp for a Rapier Head and Method for the Operation of the Same

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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
US20120125476A1 (en) * 2009-08-07 2012-05-24 Lindauer Dornier Gesellschaft Mbh Device for transferring a band-shaped weft material
US8656962B2 (en) 2009-08-11 2014-02-25 Lindauer Dornier Gesellschaft Mbh Gripper head of a weaving machine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2440697B1 (de) * 2009-06-10 2014-07-16 Lindauer Dornier Gesellschaft mbH Vorrichtung und verfahren zum schusseintrag an einer greiferwebmaschine
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
CN110760979A (zh) * 2019-12-02 2020-02-07 朱惠忠 一种用于纬纱束编织的剑杆织机及其操作方法

Citations (9)

* 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
US5341852A (en) * 1992-05-22 1994-08-30 Nuovopignone Industrie Meccaniche E Fonderia Spa Taker gripper for loom use
US5348057A (en) * 1992-06-23 1994-09-20 Nuovopignone Industrie Meccahniche E Fonderia S.P.A. Taker gripper in which the wedge moves axially within the hook
US6102084A (en) * 1997-03-14 2000-08-15 Sulzer Rueti Ag Rapier clamp
US6431223B1 (en) * 1998-11-17 2002-08-13 Sulzer Tessile Srl Bringer gripper for looms without shuttles
US20030183297A1 (en) * 2002-02-25 2003-10-02 Gividi-Italia Spa Thread clamp for a carrier thread gripper in a rapier loom
US20050284533A1 (en) * 2002-09-20 2005-12-29 Eddy Verclyte Feed rapier for a rapier loom
US20070157989A1 (en) * 2006-01-06 2007-07-12 Sultex Ag Inserting rapier for a rapier weaving machine
US7543610B2 (en) * 2006-06-16 2009-06-09 Sultex Ag Thread clamp for a rapier head

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59306886D1 (de) * 1993-05-12 1997-08-14 Rueti Ag Maschf Fadenhalter für einen Bringergreifer und Greiferwebmaschine mit Fadenhalter
DE59705563D1 (de) * 1996-06-07 2002-01-10 Picanol Nv Gebergreifer für eine greiferwebmaschine
BE1011480A3 (nl) * 1997-10-03 1999-10-05 Picanol Nv Gevergrijper voor een grijperweefmachine.

Patent Citations (9)

* 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
US5341852A (en) * 1992-05-22 1994-08-30 Nuovopignone Industrie Meccaniche E Fonderia Spa Taker gripper for loom use
US5348057A (en) * 1992-06-23 1994-09-20 Nuovopignone Industrie Meccahniche E Fonderia S.P.A. Taker gripper in which the wedge moves axially within the hook
US6102084A (en) * 1997-03-14 2000-08-15 Sulzer Rueti Ag Rapier clamp
US6431223B1 (en) * 1998-11-17 2002-08-13 Sulzer Tessile Srl Bringer gripper for looms without shuttles
US20030183297A1 (en) * 2002-02-25 2003-10-02 Gividi-Italia Spa Thread clamp for a carrier thread gripper in a rapier loom
US20050284533A1 (en) * 2002-09-20 2005-12-29 Eddy Verclyte Feed rapier for a rapier loom
US20070157989A1 (en) * 2006-01-06 2007-07-12 Sultex Ag Inserting rapier for a rapier weaving machine
US7543610B2 (en) * 2006-06-16 2009-06-09 Sultex Ag Thread clamp for a rapier head

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120125476A1 (en) * 2009-08-07 2012-05-24 Lindauer Dornier Gesellschaft Mbh Device for transferring a band-shaped weft material
US8550123B2 (en) * 2009-08-07 2013-10-08 Lindauer Dornier Gesellschaft Mbh Device for transferring a band-shaped weft material
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
EP2037023A1 (de) 2009-03-18
CN101387036A (zh) 2009-03-18
JP2009068159A (ja) 2009-04-02

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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BACHOFEN, MARIUS;D'INCAU, REMO;RUEGG, ROBERT;REEL/FRAME:021518/0052;SIGNING DATES FROM 20080827 TO 20080909

STCB Information on status: application discontinuation

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