EP1127181B1 - Pince a fil pour une lance d'une machine a tisser a lances - Google Patents

Pince a fil pour une lance d'une machine a tisser a lances Download PDF

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Publication number
EP1127181B1
EP1127181B1 EP99950613A EP99950613A EP1127181B1 EP 1127181 B1 EP1127181 B1 EP 1127181B1 EP 99950613 A EP99950613 A EP 99950613A EP 99950613 A EP99950613 A EP 99950613A EP 1127181 B1 EP1127181 B1 EP 1127181B1
Authority
EP
European Patent Office
Prior art keywords
clamping
thread clamp
clamping element
thread
clamp according
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
EP99950613A
Other languages
German (de)
English (en)
Other versions
EP1127181B2 (fr
EP1127181A1 (fr
Inventor
Eddy Verclyte
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
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Priority claimed from BE9800755A external-priority patent/BE1012242A3/nl
Priority claimed from BE9900070A external-priority patent/BE1012459A6/nl
Application filed by Picanol NV filed Critical Picanol NV
Publication of EP1127181A1 publication Critical patent/EP1127181A1/fr
Publication of EP1127181B1 publication Critical patent/EP1127181B1/fr
Application granted granted Critical
Publication of EP1127181B2 publication Critical patent/EP1127181B2/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
    • D03D47/233—Carrying grippers

Definitions

  • the invention relates to a thread clamp for a gripper of a rapier with two clamping elements for clamping a weft thread, both of which each have a clamping portion, wherein the two clamping portions face each other.
  • a thread clamp is known from EP-A-0 207 533.
  • the invention has for its object to provide an improved thread clamp for grippers.
  • clamping portion of at least one of the clamping elements is adjustable relative to the clamping portion of the other clamping element and to its base body.
  • the clamping portion is attached to the base body by means of a holding part, and that a deformable connection point between the clamping portion and holding part is provided.
  • This elastically deformable connection point allows the adjustment of the clamping section, without the need to provide wear-prone parts.
  • the adjusting device includes an adjusting screw which is arranged in the region of the connection point between the base body or the holding part and the clamping portion. For a stepless adjustment of the clamping portion relative to the other is possible.
  • the movable clamping element forming a clamping portion leaf spring is whose end facing away from the clamping portion is attached to an extension of the main body of the other clamping element.
  • the adjusting or adjusting means are provided with means for limiting the Einstellweges. This ensures that the adjustment of the clamping portion is not so far that a plastic deformation occurs in the joint.
  • a Gebergreifer 1 which serves for introducing a weft yarn 2 in a shed 3, which is formed between warp threads 4 and 5.
  • the Gebergreifer 1 is fixed in a known manner by means of screws 6 at the front end of a rapier band 7.
  • the gripper belt 7 is driven by means not shown drive means and zoom in with the Gebergreifer 1 in the shed 3 and moved back out of the shed 3 to bring a weft 2 in the shed 3.
  • the Gebergreifer 1 has a hollow chamber-like housing 19 which is formed of a plurality of sections 8, 9, 10, 11 and 12 of a bent sheet.
  • the sheet metal is for example made of steel, an aluminum alloy or another metal.
  • a thread clamp 13 for a weft thread 2 by means of screws 14, 15 is attached in the region of the section 12.
  • the screws 14, 15 engage through transversely to the gripper longitudinal direction directed slots 16, 17, so that the thread clamp 13 can be fixed in a preselectable position on the hook body 19.
  • the thread clamp 13 has a base body 18 which is fixed by means of the screws 14, 15 fixed to the portion 12 of the gripper housing 19.
  • the stationary mounted base body 18 is integral with a clamping portion 20 which forms with its underside a clamping surface 21 for a weft thread.
  • a thread guide 22 is additionally attached by means of the screws 14, 15, which leads the weft yarn 2 to the region of the bottom of the gripper housing 19 down until the weft yarn 2 starts against a stop 23 of the yarn guide 22.
  • the thread clamp 13 further includes a movable clamping member 24 which consists of a leaf spring, which is for example made of spring steel.
  • the leaf spring forms with its top a clamping portion 25 for the weft yarn 2, which is opposite to the clamping surface 21 of the clamping portion 20 of the stationary clamping element 20.
  • the clamping section 25 facing away from the end 26 of the movable clamping element 24 is attached by means of a screw 28 to an extension 27 of the stationary base body 18. Due to a bias, the clamping element 24 exerts a defined clamping force in its clamping portion 25 on the clamping portion 20.
  • the clamping surface 21 of the clamping portion 20 is provided with a cross-sectionally substantially triangular rib which cooperates with a groove 29 of the movable clamping element 24.
  • the shed 3 When the gripper 1 - as shown in Fig. 1 - the shed 3 is delivered, so he takes a weft yarn 2, which is held between a feed needle 32 and the fabric 33.
  • the weft yarn 2 is guided below the portion 9 by means of the edges of cutouts of the portions 10 and 12 until it starts against the stops 34 and 35 of the gripper housing 19.
  • the weft thread 2 is received by the thread clamp 13 and runs against the stop 23 of the thread guide 22 at. Between the stop 23 and the stop 35 of the weft thread, as can be seen in the cross section of Fig. 2, at an angle H of about 50 ° to the portion 11, which forms the bottom of the gripper housing 19.
  • the weft thread 2 is clamped in the thread clamp 13 between the stopper 34 and the stopper 23. Once the weft yarn 2 is held clamped in the thread clamp 13, it is cut off by means of a weft cutter, not shown, in the region of the fabric 33 and then entered into the shed 3. In this entry, the weft yarn 2 is withdrawn from a thread supply, not shown, in particular from a Vorspul réelle or even from a coil.
  • the clamping portion 20 is adjustable relative to its base body 18 and to the clamping portion 25 of the movable clamping member 24 to adjust the angle A (FIG. 3) between the clamping surface 21 and the clamping portion 25 provided with the thread clamp 13 closed.
  • an elastically deformable connection point 37 is provided between the clamping portion 20 and the base body 18. This consists in the embodiment of a narrow web, which is present in the vicinity of the bottom and which has been obtained by means of a cutout 38.
  • an adjusting screw 39 is provided, which is screwed into a projection 40 of the base body 18 and which is supported against a side wall 41 of the cutout 38.
  • a lock nut 42 is provided in order to secure the adjusting screw 39 in the projection 40 of the base body 18.
  • the adjusting screw 39 is further screwed into the projection 40, as shown in Fig. 4, the elastically deformable joint 37 is deformed, so that instead of the angle A, the angle D results.
  • the position of the clamping portion 20 is infinitely adjustable.
  • the generally designated 30 setting means of the clamping portion 20 is further provided with a travel limit to limit the adjustment so that the range of elastic deformation is not exceeded.
  • a hook-shaped stop element 70 is provided on the projection 40, which engages with a stop surface 71 behind a stop surface 73 of the clamping portion 20.
  • the maximum adjustment of the clamping portion 20 is achieved. This prevents that the elastic joint 37 is deformed so much that a palstician deformation occurs. A plastic deformation would damage the thread clamp 13 as a whole, since they can not be brought back into a desired angular position.
  • the angle between the range A and D can be adapted to the weft threads to be processed and adjusted accordingly, without the position of the base body 18 relative to the Gebergreifer 1 is changed. Due to the interaction of the elastically deformable connection point 37 and the adjusting screw 39, the adjustment of the clamping portion 20 is not influenced by friction and / or play and / or wear of the adjusting means.
  • the setting can be changed again without affecting the setting means. It can be made a precise and above all stepless adjustment of the angle A to D. This is especially important when weaving weft threads, which consist of several thin threads or so-called filaments, which together form a thicker weft thread. The more filaments are present and the thinner they are, the smaller the angle A, D must be selected.
  • a stop face 72 of the hook-shaped stop element 70 comes into contact with a stop face 74 of the clamping section 20, whereby a further deformation of the elastic connection point 37 is restricted. It can thereby be achieved that the clamping portion 20 is always pressed with a defined force against the adjusting screw, which is generated as a spring force of the elastic connection point 37.
  • the running as a leaf spring, movable clamping member 24 is adjustable by means of an adjusting element 44 which has the shape of a bent leaf spring, as shown in Fig. 5.
  • the adjusting element 44 may cooperate in a known manner with a direction indicated in Fig. 5 stop 45, which is stationary on a Not shown frame of the loom is attached.
  • This stopper 45 is arranged next to the path of movement of the Gebergreifers 1 that he presses the adjusting element 44 inwardly during movement of Gebergreifers 1 along this stop 45 and thus the thread clamp 13 opens.
  • the adjusting element 44 is fastened together with the movable clamping element 24 with the interposition of an intermediate piece 43 by means of the screw 28 on the extension 27 of the base body 18.
  • the adjusting device 30 is not provided with a hook-shaped stop for limiting the setting path. In this embodiment, however, the adjustment can be limited by the fact that the adjusting screw 39 has a correspondingly limited length.
  • a second adjusting device 31 is provided, by means of which also the angle between the clamping surface 21 of the clamping portion 20 and the clamping portion 25 of the clamping element 24 can be adjusted when the thread clamp 13 is closed.
  • the clamping element 24 is executed according to the embodiment of FIGS. 1 to 5 and fastened by means of a screw 28 to an extension 46 of the base body 54 of the stationary clamping element.
  • the main body 54 is fastened with screws 14, 15 on the gripper housing 19 according to FIGS. 1 to 5.
  • the extension part 46 is divided into two sections, which are connected to each other by means of an elastically deformable connection point 47. In the region of this connection point 47, a milled cavity 48 is provided which is bounded on both sides by projections 51, 52.
  • An adjusting screw 49 is screwed into the projection 51 and is opposite to a side wall of the projection 52.
  • a lock nut 50 is provided on the adjusting screw 49.
  • the projection 51 is provided with a hook-shaped stop element 75, which has a stop surface 76 for a opposite surface 77 of the projection 52 forms and limited in this way the maximum adjustment.
  • the angular position of the clamping portion 25 of the clamping element 24 relative to the clamping surface 21 of the clamping portion 20 can be changed by means of the adjusting means 31 by correspondingly the extension 46 in the region of the elastically deformable connection point 47 is deformed.
  • the adjusting screw 49 is rotated and further screwed into the projection 51, the joint 47 is elastically deformed.
  • the angle A between the clamping surface 21 of the clamping portion 20 and the clamping portion 25 of the clamping element 24 changes from the angle A to the angle E in accordance with Fig. 7.
  • Turning the adjusting screw 49 has only a relatively small change in angle between the clamping surface 21 and the Pinching 25 result. This is due to the fact that the elastic connection point 47 is arranged at a greater distance from the clamping portion 25 of the clamping element 24 and that, moreover, the clamping element 24 is elastically deformable as a whole.
  • the angle adjustment can thus be adjusted relatively fine by means of an adjusting screw, especially if the thread pitch of the adjusting screw is selected accordingly.
  • an adjustment of the adjusting screw 39 leads to a relatively large change in angle. This makes it possible to change the angle adjustment by means of the adjusting screw 39 relatively quickly and perform a fine adjustment by means of the adjusting screw 49.
  • the force can be adjusted by means of the adjusting device 31, which is exerted by the clamping portion 25 of the clamping element 24 on the clamping surface 21 of the clamping portion 20.
  • This thread clamp 13 can be adjusted for example in the following manner. First, the clamping force is determined by turning the adjusting screw 49, which exerts the clamping element 24 with its clamping portion 25 on the clamping surface 21 of the clamping portion 20 of the other clamping element. Thereafter, the angular position between the clamping surface 21 of the clamping portion 20 is then adjusted to the clamping portion 25 by means of the adjusting screw 39 to a desired angle. This can be done before the main body 54 is attached to the gripper housing 19, or even afterwards. If it is determined during weaving that the thread clamp 13 does not optimally clamp the weft thread, the thread clamp 13 can be readjusted by means of the adjusting devices 30 and / or 31 without the thread clamp 13 being removed from the hook housing 19.
  • the clamping portion 20 is provided with a holding part 36 which is fixed by means of one or more screws 53 stationary on the base body 54 of the clamping element.
  • the deformable connection point 37 and the adjusting device 30 are provided in this embodiment between the holding part 36 and the clamping portion 20.
  • movable clamping element 24 and other actuating means can be provided as adjusting to open the thread clamp 13.
  • a modified embodiment which has a stationary arranged clamping element 61 with a clamping portion 25.
  • the clamping element 61 is integrally formed with a holder 55 which is fixed by means of screws 14, 15 on the gripper housing 19.
  • the clamping section 25 of the stationary clamping element 61 is assigned a movable clamping section 60 with a clamping surface 21.
  • the clamping portion 60 is integrally formed with a two-armed lever 57 which is pivotally mounted about an axis 56 on the holder 55. Between the lever 57 and the rearwardly extended stationary clamping element 60, a compression spring 58 is arranged, which presses the clamping portions 60, 61 against each other.
  • the lever arm 59 of the lever which has the clamping portion 60, is provided with an adjusting device 30 according to the embodiment of FIGS. 1 to 5, by means of which the angle B can be adjusted.
  • the lever 57 is pivoted against the action of the compression spring 58 by means of a stop, not shown counterclockwise about the axis 56.
  • the projection 40 is provided with a hook-shaped stopper 78 which forms a stop surface 79, which is associated with a stop surface 80 of the clamping portion 60.
  • this hook-shaped stop 78 is limited in this embodiment, the adjustment.
  • the invention is not limited to the illustrated embodiments. In particular, combinations between the embodiments are possible.
  • the elastic joints 37, 47 have the advantage that they are not subject to wear and are free of play.
  • the hook-shaped stops 70, 75, 78 which limit the adjustment paths of the adjusting devices 30, 31, other measures can be provided.
  • the same effect can also be achieved in that the length of the adjusting screws 39, 49 is selected so that the range of plastic deformation is certainly not reached.
  • connection points 37, 47 it is of course also possible to provide other adjustment means in the region of the elastic connection points 37, 47, by the adjustment of which an elastic deformation of these connection points 37, 47 is achieved, for example by spreading elements, which are inserted into the recesses 38, 48.
  • the thread clamp has been disclosed as part of a Gebergreifers.
  • a suitably designed thread clamp but also be provided in a gripper rapier.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)

Claims (10)

  1. Pince-fil (13) pour une pince (1) d'une machine à tisser à pinces avec deux éléments de serrage pour le serrage d'un fil de trame, qui présentent tous les deux à chaque fois une section de serrage (20, 25), où les deux sections de serrage se situent l'une en face de l'autre, caractérisé en ce que la section de serrage (20, 25) d'au moins l'un des éléments de serrage est réglable relativement à la section de serrage (25, 20) de l'autre élément de serrage et à son corps de base (18, 54, 59).
  2. Pince-fil selon la revendication 1, caractérisé en ce qu'il est prévu entre le corps de base (18, 54, 59) de l'élément de serrage et la section de serrage ajustable (20, 25) un emplacement de liaison (37, 47) déformable élastiquement au moyen d'une installation de réglage (30, 31).
  3. Pince-fil selon la revendication 1 ou 2, caractérisé en ce que la section de serrage (20) est montée sur le corps de base (54) au moyen d'une partie de retenue (36), et en ce qu'un emplacement de liaison déformable (37) est prévu entre la section de serrage (20) et la partie de retenue (36).
  4. Pince-fil selon la revendication 2 ou 3, caractérisé en ce que l'installation de réglage (30, 31) comporte une vis de réglage (39, 49) qui est disposée dans la zone de l'emplacement de liaison (37, 47).
  5. Pince-fil selon l'une des revendications 1 à 4, caractérisé en ce qu'un élément de serrage est disposé d'une manière stationnaire et un élément de serrage (24) d'une manière mobile par rapport à celui-ci, et en ce que l'élément de serrage stationnaire est pourvu de la section de serrage réglable (20).
  6. Pince-fil selon la revendication 5, caractérisé en ce que sont prévus un élément de serrage stationnaire et un élément de serrage mobile relativement à celui-ci, et en ce que l'élément de serrage mobile (24) est un ressort à lames formant une section de serrage (25), dont l'extrémité (26) éloignée de la section de serrage (25) est fixée à un prolongement (27, 46) du corps de base (18, 54) de l'autre élément de serrage.
  7. Pince-fil selon la revendication 6, caractérisé en ce que la position du prolongement (46) du corps de base (54) est ajustable relativement au corps de base (54).
  8. Pince-fil selon l'une des revendications 1 à 7, caractérisé en ce que l'élément de serrage mobile comprend un levier (57, 59) logé d'une manière pivotante qui présente une section de serrage (20) ajustable relativement à un bras de levier (59).
  9. Pince-fil selon l'une des revendications 1 à 8, caractérisé en ce qu'au moins une installation de réglage (30, 31) présente des moyens (70, 75, 78) pour la limitation du chemin de réglage.
  10. Pince-fil selon l'une des revendications 1 à 9, caractérisé en ce que l'une des sections de serrage (20) présente une nervure s'étendant dans sa direction longitudinale, à laquelle est associée une rainure longitudinale (29) de la section de serrage opposée (25).
EP99950613A 1998-10-21 1999-10-05 Pince a fil pour une lance d'une machine a tisser a lances Expired - Lifetime EP1127181B2 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
BE9800755A BE1012242A3 (nl) 1998-10-21 1998-10-21 Draadklem voor een grijper van een grijperweefmachine.
BE9800755 1998-10-21
BE9900070A BE1012459A6 (nl) 1999-02-03 1999-02-03 Draadklem voor een grijper van een grijperweefmachine.
BE9900070 1999-02-03
PCT/EP1999/007353 WO2000023642A1 (fr) 1998-10-21 1999-10-05 Pince a fil pour une lance d'une machine a tisser a lances

Publications (3)

Publication Number Publication Date
EP1127181A1 EP1127181A1 (fr) 2001-08-29
EP1127181B1 true EP1127181B1 (fr) 2006-01-04
EP1127181B2 EP1127181B2 (fr) 2010-07-28

Family

ID=25663151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99950613A Expired - Lifetime EP1127181B2 (fr) 1998-10-21 1999-10-05 Pince a fil pour une lance d'une machine a tisser a lances

Country Status (5)

Country Link
US (1) US6453952B1 (fr)
EP (1) EP1127181B2 (fr)
AT (1) ATE315119T1 (fr)
DE (1) DE59913024D1 (fr)
WO (1) WO2000023642A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50213973D1 (de) * 2002-09-20 2009-12-10 Picanol Nv Gebergreifer für eine greiferwebmaschine
EP1918437A1 (fr) * 2006-11-02 2008-05-07 Sultex AG Procédé et dispositif pour l'insertion du fil de trame
BE1018774A3 (nl) 2009-06-10 2011-08-02 Picanol Nv Grijpereenheid, controlesysteem voor een grijpereenheid en weefmachine.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1066091B (it) * 1976-12-27 1985-03-04 Somet Soc Mec Tessile Pinza traente per telai di tessitura ad alimentazione continua della trama
BE902141A (nl) * 1985-04-09 1985-10-09 Picanol Nv Verbeterde grijpers voor weefmachines.
IT1245579B (it) * 1991-03-22 1994-09-29 Somet Soc Mec Tessile Pinza portante per telai di tessitura senza navetta
EP0644286B1 (fr) * 1993-09-20 1997-04-16 Sulzer RàœTi Ag Arrangement pour présenter des fils de trame
CH692457A5 (it) * 1997-07-29 2002-06-28 Gividi Italia Spa Pinza traente per telai a tessere a lance ed impiego della pinza.
BE1011480A3 (nl) * 1997-10-03 1999-10-05 Picanol Nv Gevergrijper voor een grijperweefmachine.

Also Published As

Publication number Publication date
US6453952B1 (en) 2002-09-24
EP1127181B2 (fr) 2010-07-28
WO2000023642A1 (fr) 2000-04-27
ATE315119T1 (de) 2006-02-15
EP1127181A1 (fr) 2001-08-29
DE59913024D1 (de) 2006-03-30

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