EP0990723A1 - Schussfadeneintragsvorrichtung - Google Patents

Schussfadeneintragsvorrichtung Download PDF

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Publication number
EP0990723A1
EP0990723A1 EP99420200A EP99420200A EP0990723A1 EP 0990723 A1 EP0990723 A1 EP 0990723A1 EP 99420200 A EP99420200 A EP 99420200A EP 99420200 A EP99420200 A EP 99420200A EP 0990723 A1 EP0990723 A1 EP 0990723A1
Authority
EP
European Patent Office
Prior art keywords
clamp
leaf
magnetic
zone
supply
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Withdrawn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
EP99420200A
Other languages
English (en)
French (fr)
Inventor
Carlos Matas Gabalda
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.)
ICBT Diederichs SAS
Original Assignee
ICBT Diederichs SAS
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 ICBT Diederichs SAS filed Critical ICBT Diederichs SAS
Publication of EP0990723A1 publication Critical patent/EP0990723A1/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Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to the field of weaving looms, and more particularly to weaving looms whose insertion of the weft thread is ensured by pliers. It aims more precisely an improvement of the clamps in the mechanism of the exchange of the wire.
  • the device for the insertion of the thread weft consists essentially of two clamps, respectively of supply and exit, moving in alternating movements from both sides of the fabric penetrating substantially the same distance into the crowd to an exchange zone.
  • the clamps run through the crowd by sliding on a solid breakdown of the leaf, the feed clamp exerting a clamping force on the weft thread which can cause it to the exchange zone, and the output clamp exerting a clamping force on the wire weft to bring it back to the opposite edge of the fabric.
  • the looms and pliers are divided into two families differentiating by the operation at the time of the exchange of the wire.
  • the inlet and outlet clamps are equipped with mechanisms acting when the clamps reach the exchange zone some thread.
  • the mechanism on the feed clamp opens as soon as the mechanism of the output clamp pinched the weft thread when closing. In this way, the weft thread is always held during its transfer from one clamp to another.
  • the order of these different mechanisms are carried out mechanically, by means of cams, or else electromechanically, through the use of electromagnets. We understand that the need to control the complex movements of the mechanisms present on the so-called clamps "positive” slows the maximum weaving rates.
  • this frame is generally held by the ends of the clamp supply system forming a lever and spring system.
  • the weft is brought to the center of the fabric to be transferred to the output clamp.
  • the outlet clamp has a hook shape, and tears off the frame of the clamp in its return movement. This weft is held in the hook of the clamp exit by a lever system and spring corners.
  • the negative clamp device has the advantage of having more regular movements without the need for accompanying the clamps in the center of the machine to carry out the "positive" transfer of the frame.
  • the problem which the invention proposes to solve is that of combining both the speed of execution and simplicity of movement of the "negative” pliers, with the great versatility and adaptability to a wide variety of "positive" clamp wires.
  • the invention therefore relates to a device for the insertion of the weft thread, usable on the looms with pliers, the pliers respectively of infeed and out moving in alternating movements from both sides of the fabric as it enters substantially the same distance in the crowd to an exchange area, said clamps traversing the crowd by sliding on a solid failure of the leaf, the clamp being able to exert a pinching force on the weft thread to drive it up to the exchange zone, the outlet clamp being able to exert a clamping force on the weft thread to tear it off with the feed clamp, at the level of the exchange zone.
  • the invention consists in facilitating the transfer of the weft yarn from a clamp to the other by releasing the holding force of the wire in the feed clamp when this reaches the exchange zone, and concomitantly to accentuate the grip of the wire by the exit place when the latter tears off the weft thread at the supply place.
  • the decrease and / or increase in the clamping force is controlled by the passage of the clamps over the exchange zone, without any contact mechanical, but magnetically. This avoids any problem of wear by the contact of control parts.
  • the magnetic element placed on the leaf can act either on pieces in ferromagnetic material, either on parts themselves magnetized.
  • the element of the supply clamp capable of move is a piece of ferro-magnetic material located on the area of the clamp of supply opposite the leaf, to form one of the pinching members proper, and mounted on said zone by means of a compression spring.
  • the active part of the clamp forming the nip area properly said, comprises two bodies facing each other.
  • the one of these organs located the most near the leaf is spring loaded so as to be pressed against the opposite member when the gripper travels its main path.
  • the reverse arrangement can be adopted on the output clamp in which the element able to move is located on the area of the clamp opposite the leaf and mounted on said area via a spring.
  • the element of the supply clamp capable of moving is a magnetized part, located on the area of the clamp opposite the leaf, to form a pinching members proper, said magnetic part being arranged in such a way so that the faces of the magnetic element integral with the leaf and said part coming to look at each other have opposite magnetic polarities.
  • the element capable of moving can be a magnetized part located on the zone of the exit clamp opposite the leaf, to form a pinching members proper, said magnetic part being arranged in such a way so that the faces of the magnetic element integral with the leaf and said part coming to look at each other have identical polarities.
  • the supply clamp comprises a second part magnetized forming with the first magnetized part the pinching zone proper, and whose magnetic polarity is oriented so as to attract said first part.
  • the same arrangement can be adapted on the output clamp.
  • the invention consists in equipping the so-called “negative” clamps with mechanisms that both relieve the pinching of the wire on the feed clamp, and to accentuate the pinching by the output clamp, at the time of the transfer by tearing.
  • the mechanisms work thanks to the action of a permanent magnet located on the beating at the level of the exchange zone, and acting on the mechanisms present at the level clamps, made either by ferromagnetic parts, or by parts themselves magnetized.
  • the feed clamp (1) and more precisely its end has an opening (2) oriented towards the front, that is to say in the direction of progression of the lance during the introduction of the weft thread.
  • This opening (2) comprises a pinching zone (3) constituted by two surfaces (4, 5), coming towards each other to form a narrow clearance (6) inside which wedges the weft thread.
  • the clamp comprises in its part (8) intended to come into view with the leaf, a movable part (9) mounted slidingly in a housing (10).
  • This part is made of a ferromagnetic material, by example a steel with a high carbon content.
  • a working spring (11) in compression that is to say pushing at rest the part (9) outside the housing (10), in the direction of the face (4) forming the opposite face of the nip (3).
  • the outlet clamp (20) illustrated in FIG. 2 has an opening (22) directed towards the rear of the lance, so as to form a hook to tear off the wire weft (15) to the gripper.
  • This opening (22) has a nip (23) formed by two surfaces (24, 25) forming a game (26) of small dimension, able to wedge the weft thread (15).
  • the part (28) of the hook-shaped pliers, and remote of the leaf comprises a housing (30) inside which is mounted to slide freely a piece (29) of ferromagnetic material.
  • the bottom of the housing (30) comprises a spring (31) working in compression, that is to say grouping the part (29) towards the outside of the housing (30).
  • This exchange zone (16) has a magnet at the flap, not shown. permanent (17) whose magnetization is oriented towards the path of the clamps (1, 20).
  • the movable element (9) of the clamp feed (1) is pushed towards the nip (3) to trap the wire (15) against the opposite surface (4), the spring (11) therefore effectively clamps the wire (15).
  • the moving part (29) is pushed back towards the nip (23) by the spring (31).
  • the supply and output clamps (1, 20) are cross, downstream of the exchange zone (16).
  • the permanent magnet (17) acts on the part (9) by attracting it towards the bottom of the housing (10), thereby relieving the pinching force exerted on the weft thread (15).
  • the compression spring (11) can therefore be seen a little more compressed.
  • the permanent magnet (17) carried by the leaf attracts the moving part (29) which moves downwards towards the leaf to decrease the opening of the nip, and therefore increase the nip force wire (15) exerted by the output clamp (20).
  • the feed clamp starts its backward movement to withdraw from the exchange zone (16).
  • the output clamp (20) is facing the magnet (17)
  • the weft thread (15) is strongly pinched to ensure good lifting.
  • the feed clamp (41) which has also a forward-facing opening (42) is provided at the level of the pinching (43) of two permanent magnets (47) and (49).
  • the element (49) located on the part (48) of the clamp coming in front of the leaf is mounted free sliding in a housing (50).
  • the feed clamp (41) also includes another magnetic (47) and fixed element. located in the part of the clamp opposite the leaf.
  • the polarities of the elements (47) and (49) are oriented in such a way that these the latter attract each other, to ensure an effective pinching of the weft thread when it found in the pinch area (43).
  • the mutual attraction of the two magnets (47) and (49) plays the role of the compression spring (11) of the variant illustrated in FIG. 1.
  • the outlet clamp (60) illustrated in FIG. 4 also includes elements magnetized referenced (69) and (67).
  • the magnetic element (69) is mounted to slide freely in a housing (70) formed on the part of the outlet clamp (60) which comes opposite of the clapper.
  • the element (67) is fixedly mounted inside the part forming the hook (68) of the output clamp (60).
  • the magnetic polarities of the magnetized elements (69), (67) are chosen and arranged in such a way that these two elements (67) and (69) attract each other, for pinch the weft thread (15).
  • the element (49) of the supply clamp (41) has a pole North towards the pinch zone, the opposite element (47) directing its South pole towards the pinch area (43). Element (49) therefore has the South pole directed towards the beating.
  • the permanent magnet (17) present on the leaf presents its North pole towards outlet and supply clamps.
  • the polarities are distributed inversely, i.e. that the element (69) has its North pole directed towards the leaf, while its South pole is oriented towards the pinch zone opposite the North pole of the element (67).
  • the exit clamp then begins its movement set back, the two inlet and outlet clamps therefore being in the exchange zone, subjected to the effects of the permanent magnet (17).
  • the permanent magnet (17) acts on the supply clamp (41) by attracting downwards, at the bottom of the housing (50) the moving magnetic part (49), the polarities in look of the magnets (47, 49) being opposite. It follows that the pinching force of the wire weft is slightly loosened at the feed gripper. On the output clamp (60), the element (69) is repelled by the permanent magnet (17), the polarities opposite these two elements being identical. It follows that the element (69) is pushed back towards from outside the housing (70), and compresses the wire (15) against the element (67) mounted on the hook (68).
  • the wire is more strongly pinched by the output clamp (60) at the time of uprooting.
  • the additional gripping force caused by the repulsion of the magnetic element (69) by the magnet (17) disappears.
  • the pinch force of the weft thread (15) is ensured by the single attraction of the magnetic elements (67) and (69).
  • the invention covers the variants in which the two modes of embodiment of Figures 1 and 4 are mixed, in which one of the clamps has a mobile ferromagnetic element, while the other has a magnetic element.
  • the invention also covers the variants in which only one of the pliers is equipped, in accordance with the invention, although the tearing-off occurs in this case of less secure way.
  • the invention also covers the variants in which the permanent element located on the leaf consists of one or more electromagnets controlled so suitable for presenting desired polarities.
  • weft insertion device conforms to the invention has the advantage of being usable for fancy weft threads, relatively irregular, while retaining the rates of negative clamps, and without require additional complex mechanical parts which are sources of friction and of wear.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP99420200A 1998-09-30 1999-09-23 Schussfadeneintragsvorrichtung Withdrawn EP0990723A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9812400A FR2783842A1 (fr) 1998-09-30 1998-09-30 Dispositif pour l'insertion du fil de trame
FR9812400 1998-09-30

Publications (1)

Publication Number Publication Date
EP0990723A1 true EP0990723A1 (de) 2000-04-05

Family

ID=9531163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99420200A Withdrawn EP0990723A1 (de) 1998-09-30 1999-09-23 Schussfadeneintragsvorrichtung

Country Status (3)

Country Link
EP (1) EP0990723A1 (de)
JP (1) JP2000110050A (de)
FR (1) FR2783842A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1479808A2 (de) * 2003-05-20 2004-11-24 NV Michel van de Wiele Verfahren und Vorrichtung zur Übergabe eines Schussgarns von einem Bringergreifer zu einem Nehmergreifer
EP1918437A1 (de) 2006-11-02 2008-05-07 Sultex AG Verfahren und Vorrichtung zum Eintragen eines Schussfadens
WO2008052369A1 (de) * 2006-10-30 2008-05-08 Textilma Ag Schussfadeneintragvorrichtung für eine greiferwebmaschine
WO2009026732A1 (de) * 2007-08-28 2009-03-05 Textilma Ag Greifer und schussfadeneintragvorrichtung für eine greiferwebmaschine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109881332A (zh) * 2019-03-06 2019-06-14 广州忠信世纪玻纤有限公司 一种电子纱织布工艺及其装置
CN110670208B (zh) * 2019-09-04 2022-03-25 西安工程大学 一种电磁引纬夹纬器、打开器及其夹纬方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2059455A (en) * 1979-09-29 1981-04-23 Northrop Weaving Machinery Ltd Improvements in or relating to looms with stationary weft supply
EP0690160A1 (de) * 1994-06-06 1996-01-03 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Verfahren und Vorrichtung zum Schussfadeneintrag für Greiferwebmaschinen
DE29808997U1 (de) * 1998-05-18 1998-07-30 Textilma Ag Greifer und eine Schusseintragvorrichtung für eine Greiferwebmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2059455A (en) * 1979-09-29 1981-04-23 Northrop Weaving Machinery Ltd Improvements in or relating to looms with stationary weft supply
EP0690160A1 (de) * 1994-06-06 1996-01-03 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Verfahren und Vorrichtung zum Schussfadeneintrag für Greiferwebmaschinen
DE29808997U1 (de) * 1998-05-18 1998-07-30 Textilma Ag Greifer und eine Schusseintragvorrichtung für eine Greiferwebmaschine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1479808A2 (de) * 2003-05-20 2004-11-24 NV Michel van de Wiele Verfahren und Vorrichtung zur Übergabe eines Schussgarns von einem Bringergreifer zu einem Nehmergreifer
BE1015528A3 (nl) * 2003-05-20 2005-05-03 Wiele Michel Van De Nv Werkwijze en inrichting voor het overnemen van een inslaggaren door een nemergrijper van een gevergrjper.
EP1479808A3 (de) * 2003-05-20 2005-11-09 NV Michel van de Wiele Verfahren und Vorrichtung zur Übergabe eines Schussgarns von einem Bringergreifer zu einem Nehmergreifer
WO2008052369A1 (de) * 2006-10-30 2008-05-08 Textilma Ag Schussfadeneintragvorrichtung für eine greiferwebmaschine
CN101802281B (zh) * 2006-10-30 2011-08-31 泰克斯蒂尔玛股份公司 用于片梭织机的衬纬装置
EP1918437A1 (de) 2006-11-02 2008-05-07 Sultex AG Verfahren und Vorrichtung zum Eintragen eines Schussfadens
US7584769B2 (en) 2006-11-02 2009-09-08 Sultex Ag Method and apparatus for the insertion of a weft thread
WO2009026732A1 (de) * 2007-08-28 2009-03-05 Textilma Ag Greifer und schussfadeneintragvorrichtung für eine greiferwebmaschine

Also Published As

Publication number Publication date
JP2000110050A (ja) 2000-04-18
FR2783842A1 (fr) 2000-03-31

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