EP1876273B1 - Rapier, method of manufacturing same, device for inserting weft yarns comprising such a rapier and loom equipped with such a device - Google Patents

Rapier, method of manufacturing same, device for inserting weft yarns comprising such a rapier and loom equipped with such a device Download PDF

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Publication number
EP1876273B1
EP1876273B1 EP20070356091 EP07356091A EP1876273B1 EP 1876273 B1 EP1876273 B1 EP 1876273B1 EP 20070356091 EP20070356091 EP 20070356091 EP 07356091 A EP07356091 A EP 07356091A EP 1876273 B1 EP1876273 B1 EP 1876273B1
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EP
European Patent Office
Prior art keywords
rapier
reinforcement
flexible part
claw
lance
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 - Fee Related
Application number
EP20070356091
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German (de)
French (fr)
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EP1876273A1 (en
Inventor
Martin Burkert
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.)
Schoenherr Textilmaschinenbau GmbH
SCHONHERR TEXTILMASCHINENBAU GmbH
Original Assignee
Schoenherr Textilmaschinenbau GmbH
SCHONHERR TEXTILMASCHINENBAU GmbH
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Publication date
Application filed by Schoenherr Textilmaschinenbau GmbH, SCHONHERR TEXTILMASCHINENBAU GmbH filed Critical Schoenherr Textilmaschinenbau GmbH
Publication of EP1876273A1 publication Critical patent/EP1876273A1/en
Application granted granted Critical
Publication of EP1876273B1 publication Critical patent/EP1876273B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/275—Drive mechanisms
    • D03D47/276—Details or arrangement of sprocket wheels
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms

Definitions

  • the present invention relates to a lance for a loom and to a weft insertion device.
  • the invention also relates to a loom equipped with such a lance or such an insertion device, and to a method of manufacturing such a lance.
  • a weft yarn insertion lance for a loom according to the preamble of claim 1 is known from EP 0 623 694 A1 .
  • the drive wheels of the lances each have an axis of rotation substantially parallel to the axis of the chain.
  • the flexible portions or ribbon of these lances thus have openings of engrainement disposed on the upper and lower faces of the ribbons which are substantially horizontal.
  • the method of attachment of the claws on the ribbons of the known lances is such that the claws are not oriented correctly to grasp the frames before insertion into the crowd or to allow to effectively adjust the claws in an exchange position of the weft son between two lances.
  • weft threads used in certain applications are very tight, to the point that the connection between the flexible part of a lance and the associated claw undergoes significant stresses that can lead to the rupture of spear.
  • the invention more particularly intends to provide by proposing a new lance in which the connection between the claw and one end of the flexible part is particularly robust, while allowing a correct orientation of the claw by ratio to the weft and the crowd, while the drive wheel of the lance can have an axis of rotation not parallel to the axis of the chain.
  • the invention relates to a weaving weft insertion lance for a loom, said lance comprising a flexible portion and a hooking claw of a weft thread fixed on one end of the flexible part.
  • This lance is characterized in that the aforementioned end of the flexible portion comprises a longitudinal slot in which a reinforcement is immobilized, this reinforcement being provided with at least one housing for receiving a mounting tab of the claw, and what the lance comprises means for immobilizing the or each leg of the claw in the corresponding housing.
  • the claw of a lance is the part of this lance which allows the attachment of a weft thread.
  • a "claw” may also be called “head” or “clamp” of the lance.
  • the reinforcement and the immobilization means allow effective attachment of the claw on the end of the flexible portion of the lance.
  • the reinforcement also makes it possible to ensure the orientation of the claw relative to the direction of advance of the lance.
  • the invention also relates to a device for inserting weft yarns for a loom which comprises at least one lance as previously described and a comb equipped with means, distributed along its length, for guiding the flexible part of the loom. spear.
  • Such a weft insertion device allows effective guidance of the lance over the length of its stroke.
  • the guiding means comprise a series of tabs each provided with a through hole of the flexible part, this orifice being substantially complementary to the cross section of the end of the flexible portion of the lance equipped with the reinforcement.
  • the invention also relates to a loom equipped with a lance or a weft insertion device as mentioned above.
  • steps b) and c), on the one hand, and d), on the other hand, can be reversed with respect to that indicated above.
  • the trade M represented to figures 1 and 2 is intended for the formation of two plies N 1 and N 2 of tissues, for example two carpets T 1 and T 2 woven simultaneously and separated from each other by a knife 1 hair cutter carried by a carriage 2 and arranged downstream of two strike points P 1 , P 2 towards which converge respectively two crowds F 1 , F 2 defined by the warp yarns 4 of the loom whose vertical movement is controlled by heddles 3 actuated by a Jacquard harness as well as by warp yarns 4 'whose vertical movement is controlled by healds mounted on heald frames 3', themselves driven by a dobby or a cam mechanism not shown.
  • the weft threads 5 1 and 5 2 intended to constitute, with the corresponding warp threads, the plies N 1 and N 2 are inserted into the crowds F 1 and F 2 by means of two lances 11 and 12 each comprising a head or claw 111, respectively 121, on which can be hung a weft thread 1 or 5 2 , and a flexible strip 112, respectively 122, for driving the corresponding claw in the direction of two axes Y 1 , respectively Y 2 , parallel to each other and perpendicular to the son 4 and 4 'and the plane of the figure 1 .
  • An assembly 13, forming a comb and movable pivotally about an axis Y 3 parallel to the axes Y 1 and Y 2 comprises a leaf 131 and a comb 132 consisting of a row of teeth 132a mounted on the leaf 131 and driven by it rotates about the Y axis 3 .
  • the teeth 132a can thus be brought in abutment against the points P 1 and P 2 when the leaf 131 has been pivoted about the axis Y 3 , with respect to the position of the figure 1 by means not shown and known per se.
  • the assembly 13 is equipped with a series Si of lugs 133 distributed over substantially the entire length of the comb 132, that is to say, according to the width of the loom of the loom M, and integral with the comb 132.
  • the tabs 133 are mounted in groups of three consoles 134, each bracket being fixed on a metal section 135 which is itself fixed on the upper ends of the teeth 132a, that is to say say on the ends of these teeth furthest away from the Y axis 3 .
  • Each tab 133 is pierced with an orifice 133a comprising two extensions 133a 1 and 133a 2 of substantially complementary shapes of the upper and lower portions of the cross section of the strip 112, which makes it possible to obtain a guiding effect of the strip 112 which constitutes the flexible portion of the lance 11, according to the width of the upper, as the claw 111 progresses towards the side of the comb 132 opposite to that through which it enters the crowd.
  • each tab 136 is mounted on brackets 137 fixed to the leaf 131, each tab 136 having an orifice of which two extensions are complementary in shape to the upper and lower parts of the cross section of the ribbon 122. which effectively guides the 122, which is the flexible portion of the lance 12 engaged in the crowd F 2 , without interaction with the comb 132.
  • the strips 112 and 122 are each provided with openings 114, 124 respectively, intended to mesh with the teeth 211, respectively 221, of two toothed wheels 21, respectively 22, driven, by means not shown, about two axes A 21. and A 22 fixed relative to the frame 50 of the loom and inclined with respect to a median plane ⁇ 1 between the plies N 1 and N 2 of an angle ⁇ of the order of 75 °.
  • the axes A 21 and A 22 are merged, which is however not mandatory.
  • the ribbons 112 and 122 are guided by guides 31 and 32 shown only in broken lines at the figure 2 .
  • the front ends of the ribbons 112 and 122 are respectively marked 1121 and 1221, on which the claws 111 and 121 are mounted.
  • the ribbons 112 and 122 are flexible over most of their length which is provided with the openings 114 and 124, in order to to be able to wind on the wheels 21 and 22 without generating too much stress.
  • the tapes are made of a composite material.
  • the composite material is reinforced, without affecting its bulk, in order to increase the rigidity of these end portions of the strips 112 and 122.
  • the ends or end portions 1121 and 1221 do not have to deform since they do not come directly in contact with the wheels 21 and 22. These ends must, on the contrary, have a well-defined geometry allowing easy guidance by means of the tabs 133 and 136.
  • connection between the claw 111 and the ribbon 112 must be reliable and robust in order to respond to the stresses to which it is subjected.
  • the front end 1121 of the ribbon 112 is provided with a longitudinal slot 1122 which extends parallel to the longitudinal axis X 112 of the ribbon 112, this axis coinciding with the axis Y 1 for the portion of the ribbon 112 engaged in the tabs 133.
  • a reinforcement 113 of generally parallelepipedal shape is provided to be engaged in the slot 1122.
  • the reinforcement 113 is provided with two slots 1131 and 1132 in the form of slots each extending in a direction perpendicular to a longitudinal axis X 113 of the reinforcement 113, parallel to the greatest length of the reinforcement 113.
  • the reinforcement 113 is also provided with two holes 1133 and 1134 which connect two opposite faces 1135 and 1136 of the reinforcement 113 perpendicular to the face 1137 in which the housings 1131 and 1132 open.
  • 1124 and 1125 respectively denote the lateral faces of the ribbon 112 into which the openings 114 open.
  • the faces of the ribbon 112 perpendicular to the faces 1125 and 1124 are respectively noted 1126 and 1127.
  • the ribbon 112 is provided with two holes 1128 and 1129 which connect the faces 1126 and 1127 and which are respectively aligned with the holes 1133 and 1134 when the reinforcement 113 is in place in the slot 1122.
  • the bore 1128 comprises an upper portion 1128a and a lower portion 1128b. These portions 1128a and 1128b are respectively separated from the slot 1122 by flanges 1128c and 1128d each having a central opening.
  • Two screws 115 are provided to be inserted into holes 1128 and 1129 through portions 1128a and the like, while nuts 116 provided with threads 116a are received in portions 1128b.
  • the nuts 1116 are advantageously bonded in the portions 1128b, in which case they can be made in circular section rings. However, if the nuts are polygonal in section, as shown in figure 5 they are advantageously immobilized in the portions 1128b by cooperation of shapes, in addition to a possible bonding.
  • the claw 111 is represented, for the most part, by its silhouette with Figures 4 and 5 . It is provided with two lugs 1111 and 1112 intended to be respectively inserted in the housings 1131 and 1132. Each lug 1111 and 1112 is pierced with an orifice 1113, respectively 1114, through which one of the screws 115 passes.
  • the lugs 1111 and 1112 are integral with the rest of the claw 111 which is obtained by forming a metal sheet.
  • the mounting of the claw 111 on the ribbon 112 is performed by first making the slot 1122 and inserting the reinforcement 113 in this slot.
  • the reinforcement is then immobilized in this slot by gluing.
  • the reinforcement 113 protrudes laterally by relative to the faces 1125 and 1124 of the ribbon.
  • the end 1121 then has a generally cross-shaped section.
  • the reinforcement 113 is immobilized in the slot 1122 by means of screws which pass through orifices formed in one of the branches of the end 1121 between which is defined the slot 1122. These screws are accessible from the face 1126. They pass through the reinforcement 113 and are tightened in threads formed in the branch forming the face 1127. These screws are part of the bulk of the end 1121.
  • the claw 111 is attached to this reinforcement by inserting its lugs 1111 and 1112 into the housings 1131 and 1132.
  • the holes and bores 1113, 1133 and 1128 are respectively maligned on the one hand. , 1114, 1134 and 1129, on the other hand.
  • the nuts 116 can be rotatably mounted in the portions 1128b, in which case they are immobilized during the tightening of the screws 115.
  • the ribbon 112 is advantageously made from fibers. Reinforcing fibers, such as carbon fibers, are provided at the end 1121.
  • the reinforcement 113 can be made from the same fibers as the ribbon 112 or, in a particularly advantageous aspect, exclusively from fibers of carbon, which gives it a good rigidity and a good lightness.
  • the fibers of the elements 112 and 113 are advantageously molded in a synthetic matrix. Bonding between the elements 112 and 113 is all the more effective as their constituent materials are close to, or even identical.
  • each orifice 133a generally has a cross shape with, as previously explained, two extensions 133a 1 and 133a 2 of substantially complementary shapes of the upper and lower portions of the strip 112, in the vicinity of the faces 1126 and 1127.
  • Each orifice 133a also comprises a lateral extension 133a 3 and a slot 133a 4 which allow the reinforcement 113 to pass through.
  • each orifice 133a has a shape substantially complementary to the cross section of the end 1121 equipped with the reinforcement 113.
  • the claw 121 of the lance 12 is mounted on the end 1221 of the ribbon 122 by means of a reinforcement immobilized on this ribbon and comprising receiving receptacles for mounting tabs of the claw.
  • the orifices of the tabs 136 have substantially complementary shapes of the cross section of the front end of the ribbon 122 equipped with this reinforcement.
  • the lower portion of drilling 1133 of the reinforcement 113 is sufficiently wide so that the nut 116 bears directly against the lug 1111, the force E 1 being exerted directly on this lug by the nut 116 and on the reinforcement 113 through the flange 1128c by the head of the screw 115.
  • the deformations due to the tightening of the screw affect a very small area of the end 1121 and the reinforcement 113. They do not change the quality of the guide of the lance 11 by the legs 133.
  • the clamping force E 1 could be exerted by means of rivets in place of the screws 115.
  • the invention has been shown when used in a double-tablecloth loom. It is however applicable with simple tablecloths.
  • the claw or head of the lance is removable and can be replaced independently of the tape.
  • screws and tappings such as elements 115 and 116a or 116'a, are used, these elements are reusable.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Description

La présente invention a trait à une lance pour un métier à tisser ainsi qu'à un dispositif d'insertion de fils de trame. L'invention a également trait à un métier à tisser équipé d'une telle lance ou d'un tel dispositif d'insertion, ainsi qu'à un procédé de fabrication d'une telle lance.The present invention relates to a lance for a loom and to a weft insertion device. The invention also relates to a loom equipped with such a lance or such an insertion device, and to a method of manufacturing such a lance.

Dans le domaine des métiers à tisser, il est connu, par exemple de DE-A-41 31 745 , d'utiliser des lances comprenant chacune une tête ou griffe d'entraînement de fil de trame et une partie pourvue d'ouvertures dans lesquelles engrènent les dents d'une roue. Les griffes sont fixées en débordement par rapport aux parties pourvues d'ouvertures d'engrainement.In the field of looms, it is known, for example DE-A-41 31 745 , using lances each comprising a weft threading head or claw and a portion provided with openings in which the teeth of a wheel mesh. The claws are fixed in overflow relative to the parts provided with openings of engrainement.

Une lance d'insertion de fils de trame pour métier à tisser, selon le préambule de la revendication 1 est connue de EP 0 623 694 A1 .A weft yarn insertion lance for a loom according to the preamble of claim 1 is known from EP 0 623 694 A1 .

Sur les métiers modernes simple nappe à lance flexible, les roues d'entraînement des lances ont chacune un axe de rotation sensiblement parallèle à l'axe de la chaîne. Les parties flexibles ou ruban de ces lances ont donc des ouvertures d'engrainement disposées sur les faces supérieure et inférieure des rubans qui sont sensiblement horizontales.On the modern looms simple ply with flexible lance, the drive wheels of the lances each have an axis of rotation substantially parallel to the axis of the chain. The flexible portions or ribbon of these lances thus have openings of engrainement disposed on the upper and lower faces of the ribbons which are substantially horizontal.

Si l'on souhaite utiliser des roues d'entraînement à axe de rotation sensiblement vertical ou incliné, le mode de fixation des griffes sur les rubans des lances connues est tel que les griffes ne sont pas orientées correctement pour saisir les trames avant insertion dans la foule ou pour permettre de régler efficacement les griffes dans une position d'échange des fils de trame entre deux lances.If it is desired to use drive wheels with a substantially vertical or inclined axis of rotation, the method of attachment of the claws on the ribbons of the known lances is such that the claws are not oriented correctly to grasp the frames before insertion into the crowd or to allow to effectively adjust the claws in an exchange position of the weft son between two lances.

Par ailleurs, les fils de trame utilisés dans certaines applications, notamment pour le tissage des tapis, sont très tendus, au point que la liaison entre la partie flexible d'une lance et la griffe associée subit des sollicitations importantes pouvant conduire à la rupture de la lance.Furthermore, the weft threads used in certain applications, particularly for carpet weaving, are very tight, to the point that the connection between the flexible part of a lance and the associated claw undergoes significant stresses that can lead to the rupture of spear.

C'est à ces inconvénients et limitations qu'entend plus particulièrement répondre l'invention en proposant une nouvelle lance dans laquelle la liaison entre la griffe et une extrémité de la partie flexible est particulièrement robuste, tout en permettant une orientation correcte de la griffe par rapport au fil de trame et à la foule, alors que la roue d'entraînement de la lance peut avoir un axe de rotation non parallèle à l'axe de la chaîne.It is these drawbacks and limitations that the invention more particularly intends to provide by proposing a new lance in which the connection between the claw and one end of the flexible part is particularly robust, while allowing a correct orientation of the claw by ratio to the weft and the crowd, while the drive wheel of the lance can have an axis of rotation not parallel to the axis of the chain.

A cet effet, l'invention concerne une lance d'insertion de fil de trame pour métier à tisser, cette lance comprenant une partie flexible et une griffe d'accrochage d'un fil de trame fixée sur une extrémité de la partie flexible. Cette lance est caractérisée en ce que l'extrémité précitée de la partie flexible comporte une fente longitudinale dans laquelle est immobilisé un renfort, ce renfort étant pourvu d'au moins un logement de réception d'une patte de montage de la griffe, et en ce que la lance comprend des moyens d'immobilisation de la ou chaque patte de la griffe dans le logement correspondant.For this purpose, the invention relates to a weaving weft insertion lance for a loom, said lance comprising a flexible portion and a hooking claw of a weft thread fixed on one end of the flexible part. This lance is characterized in that the aforementioned end of the flexible portion comprises a longitudinal slot in which a reinforcement is immobilized, this reinforcement being provided with at least one housing for receiving a mounting tab of the claw, and what the lance comprises means for immobilizing the or each leg of the claw in the corresponding housing.

Au sens de l'invention, la griffe d'une lance est la partie de cette lance qui permet l'accrochage d'un fil de trame. Une telle « griffe » peut également être dénommée « tête » ou « pince » de la lance. Grâce à l'invention, le renfort et les moyens d'immobilisation permettent une solidarisation efficace de la griffe sur l'extrémité de la partie flexible de la lance. Le renfort permet également d'assurer l'orientation de la griffe par rapport à la direction d'avance de la lance.In the sense of the invention, the claw of a lance is the part of this lance which allows the attachment of a weft thread. Such a "claw" may also be called "head" or "clamp" of the lance. Thanks to the invention, the reinforcement and the immobilization means allow effective attachment of the claw on the end of the flexible portion of the lance. The reinforcement also makes it possible to ensure the orientation of the claw relative to the direction of advance of the lance.

Selon des aspects avantageux mais non obligatoires de l'invention, une telle lance peut incorporer une ou plusieurs des caractéristiques suivantes, prises dans toute combinaison techniquement admissible :

  • Les moyens d'immobilisation sont aptes à exercer un effort de pincement de la ou chaque patte dans le logement correspondant.
  • Les moyens d'immobilisation comprennent au moins une vis apte à coopérer avec un taraudage fixe par rapport à l'extrémité de la partie flexible de la lance.
  • Le taraudage est formé dans un écrou rapporté, de préférence immobilisé en rotation par rapport à l'axe de son taraudage, sur l'extrémité de la partie flexible.
  • L'écrou porte contre une portion de l'extrémité de la partie flexible en appui contre le renfort, lorsque la vis est serrée dans le taraudage.
  • L'écrou porte contre une surface externe du renfort, au niveau du logement, lorsque la vis est serrée dans le taraudage.
  • L'écrou porte contre la patte en place dans le logement, lorsque la vis est serrée dans le taraudage.
  • Le taraudage est réalisé dans une portion de l'extrémité de la partie flexible.
  • Les moyens d'immobilisation comprennent au moins un rivet.
  • Le renfort en place dans la fente fait saillie de part et d'autre de l'extrémité de la partie flexible.
According to advantageous but non-mandatory aspects of the invention, such a lance may incorporate one or more of the following features, taken in any technically permissible combination:
  • The immobilizing means are able to exert a pinching force of the or each tab in the corresponding housing.
  • The immobilizing means comprise at least one screw adapted to cooperate with a fixed thread relative to the end of the flexible portion of the lance.
  • The tapping is formed in an attached nut, preferably immobilized in rotation relative to the axis of its thread, on the end of the flexible portion.
  • The nut bears against a portion of the end of the flexible portion bearing against the reinforcement, when the screw is tightened in the thread.
  • The nut bears against an outer surface of the reinforcement, at the housing, when the screw is tightened in the thread.
  • The nut bears against the tab in place in the housing, when the screw is tightened in the tapping.
  • Tapping is performed in a portion of the end of the flexible portion.
  • The immobilizing means comprise at least one rivet.
  • The reinforcement in place in the slot protrudes on both sides of the end of the flexible portion.

L'invention concerne également un dispositif d'insertion de fils de trame pour métier à tisser qui comprend au moins une lance telle que précédemment décrite ainsi qu'un peigne équipé de moyens, répartis selon sa longueur, de guidage de la partie flexible de la lance.The invention also relates to a device for inserting weft yarns for a loom which comprises at least one lance as previously described and a comb equipped with means, distributed along its length, for guiding the flexible part of the loom. spear.

Un tel dispositif d'insertion de fils de trame permet un guidage efficace de la lance sur la longueur de sa course.Such a weft insertion device allows effective guidance of the lance over the length of its stroke.

De façon avantageuse, les moyens de guidage comprennent une série de pattes pourvues chacune d'un orifice de passage de la partie flexible, cet orifice étant sensiblement complémentaire de la section transversale de l'extrémité de la partie flexible de la lance équipée du renfort.Advantageously, the guiding means comprise a series of tabs each provided with a through hole of the flexible part, this orifice being substantially complementary to the cross section of the end of the flexible portion of the lance equipped with the reinforcement.

L'invention concerne également un métier à tisser équipé d'une lance ou d'un dispositif d'insertion de fils de trame tel que mentionné ci-dessus.The invention also relates to a loom equipped with a lance or a weft insertion device as mentioned above.

Enfin, l'invention concerne un procédé de fabrication d'une lance telle que mentionnée ci-dessus qui comprend des étapes consistant à :

  1. - a) ménager, dans une extrémité de la partie flexible de la lance, une fente longitudinale ;
  2. - b) mettre en place dans la fente un renfort pourvu d'au moins un logement ;
  3. - c) immobiliser le renfort dans la fente de l'extrémité de la partie flexible ;
  4. - d) insérer dans le ou chaque logement du renfort une patte de montage de la griffe de la lance et
  5. - e) immobiliser la patte dans son logement par un effort de pincement.
Finally, the invention relates to a method of manufacturing a lance as mentioned above which comprises the steps of:
  1. - a) arrange, in one end of the flexible portion of the lance, a longitudinal slot;
  2. - b) put in the slot a reinforcement provided with at least one housing;
  3. - c) immobilize the reinforcement in the slot of the end of the flexible part;
  4. - d) insert in the or each housing of the reinforcement a mounting tab of the claw of the lance and
  5. e) immobilizing the tab in its housing by a pinching effort.

L'ordre des étapes b) et c), d'une part, et d), d'autre part, peut être inversé par rapport à celui indiqué ci-dessus.The order of steps b) and c), on the one hand, and d), on the other hand, can be reversed with respect to that indicated above.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre de quatre modes de réalisation d'une lance conforme à son principe, d'un dispositif d'insertion de fils de trame et d'un métier à tisser comprenant une telle lance, ainsi que d'un procédé de fabrication de cette lance, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une coupe de principe d'un métier à tisser conforme à l'invention équipé d'un dispositif d'insertion de fils de trame et de lances conformes à l'invention ;
  • la figure 2 est une vue en perspective partielle du métier de la figure 1 ;
  • la figure 3 est une coupe de principe à plus grande échelle selon la ligne III-III à la figure 2 ;
  • la figure 4 est une coupe éclatée des éléments visibles à la figure 3, avant assemblage de la lance ;
  • la figure 5 est une vue en perspective éclatée des éléments visibles à la figure 4 ;
  • la figure 6 est une vue analogue à la figure 3 pour une lance conforme à un deuxième mode de réalisation de l'invention,
  • la figure 7 est une vue analogue à la figure 3 pour une lance conforme à un troisième mode de réalisation de l'invention, et
  • la figure 8 est une vue analogue à la figure 3 pour une lance conforme à un quatrième mode de réalisation de l'invention.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of four embodiments of a lance according to its principle, a son insertion device. weft and weaving machine comprising such a lance, as well as a method of manufacturing this lance, given solely by way of example and with reference to the appended drawings in which:
  • the figure 1 is a basic section of a loom according to the invention equipped with a device for inserting weft threads and lances according to the invention;
  • the figure 2 is a partial perspective view of the craft of figure 1 ;
  • the figure 3 is a larger scale sectional view along the line III-III to the figure 2 ;
  • the figure 4 is an exploded cut of the elements visible to the figure 3 before assembly of the lance;
  • the figure 5 is an exploded perspective view of the elements visible in the figure 4 ;
  • the figure 6 is a view similar to the figure 3 for a lance according to a second embodiment of the invention,
  • the figure 7 is a view similar to the figure 3 for a lance according to a third embodiment of the invention, and
  • the figure 8 is a view similar to the figure 3 for a lance according to a fourth embodiment of the invention.

Le métier M représenté aux figures 1 et 2 est destiné à la formation de deux nappes N1 et N2 de tissus, par exemple deux tapis T1 et T2 tissés simultanément et séparés l'un de l'autre par un couteau 1 coupe-poils porté par un chariot 2 et disposé en aval de deux points de frappe P1, P2 vers lesquels convergent respectivement deux foules F1, F2 définies par les fils de chaîne 4 du métier dont le déplacement vertical est commandé par des lisses 3 actionnées par un harnais Jacquard ainsi que par des fils de chaîne 4' dont le déplacement vertical est commandé par des lisses montées sur des cadres de lisses 3', eux-mêmes entraînés par une ratière ou une mécanique à cames non représentée.The trade M represented to figures 1 and 2 is intended for the formation of two plies N 1 and N 2 of tissues, for example two carpets T 1 and T 2 woven simultaneously and separated from each other by a knife 1 hair cutter carried by a carriage 2 and arranged downstream of two strike points P 1 , P 2 towards which converge respectively two crowds F 1 , F 2 defined by the warp yarns 4 of the loom whose vertical movement is controlled by heddles 3 actuated by a Jacquard harness as well as by warp yarns 4 'whose vertical movement is controlled by healds mounted on heald frames 3', themselves driven by a dobby or a cam mechanism not shown.

Les fils de trame 51 et 52 destinés à constituer, avec les fils de chaîne correspondants, les nappes N1 et N2 sont insérés dans les foules F1 et F2 au moyen de deux lances 11 et 12 comprenant chacune une tête ou griffe 111, respectivement 121, sur laquelle peut être accroché un fil de trame 51 ou 52, ainsi qu'un ruban flexible 112, respectivement 122, permettant d'entraîner la griffe correspondante dans la direction de deux axes Y1, respectivement Y2, parallèles entre eux et perpendiculaires aux fils 4 et 4' et au plan de la figure 1.The weft threads 5 1 and 5 2 intended to constitute, with the corresponding warp threads, the plies N 1 and N 2 are inserted into the crowds F 1 and F 2 by means of two lances 11 and 12 each comprising a head or claw 111, respectively 121, on which can be hung a weft thread 1 or 5 2 , and a flexible strip 112, respectively 122, for driving the corresponding claw in the direction of two axes Y 1 , respectively Y 2 , parallel to each other and perpendicular to the son 4 and 4 'and the plane of the figure 1 .

Un ensemble 13, formant peigne et mobile en pivotement autour d'un axe Y3 parallèle aux axes Y1 et Y2, comprend un battant 131 et un peigne 132 constitué d'une rangée de dents 132a montées sur le battant 131 et entraînées par celui-ci en rotation autour de l'axe Y3. Les dents 132a peuvent ainsi être amenées en appui contre les points P1 et P2 lorsque le battant 131 a été pivoté autour de l'axe Y3, par rapport à la position de la figure 1, par des moyens non représentés et connus en soi.An assembly 13, forming a comb and movable pivotally about an axis Y 3 parallel to the axes Y 1 and Y 2 , comprises a leaf 131 and a comb 132 consisting of a row of teeth 132a mounted on the leaf 131 and driven by it rotates about the Y axis 3 . The teeth 132a can thus be brought in abutment against the points P 1 and P 2 when the leaf 131 has been pivoted about the axis Y 3 , with respect to the position of the figure 1 by means not shown and known per se.

Pour assurer une trajectoire sensiblement rectiligne de la griffe 111, l'ensemble 13 est équipé d'une série Si de pattes 133 réparties sur sensiblement toute la longueur du peigne 132, c'est-à-dire selon la largeur d'empeignage du métier M, et solidaires du peigne 132. Les pattes 133 sont montées par groupe de trois sur des consoles 134, chaque console étant fixée sur un profilé métallique 135 qui est lui-même fixé sur les extrémités supérieures des dents 132a, c'est-à-dire sur les extrémités de ces dents les plus éloignées de l'axe Y3.To ensure a substantially rectilinear path of the claw 111, the assembly 13 is equipped with a series Si of lugs 133 distributed over substantially the entire length of the comb 132, that is to say, according to the width of the loom of the loom M, and integral with the comb 132. The tabs 133 are mounted in groups of three consoles 134, each bracket being fixed on a metal section 135 which is itself fixed on the upper ends of the teeth 132a, that is to say say on the ends of these teeth furthest away from the Y axis 3 .

Chaque patte 133 est percée d'un orifice 133a comprenant deux extensions 133a1 et 133a2 de formes sensiblement complémentaires des parties haute et basse de la section transversale du ruban 112, ce qui permet d'obtenir un effet de guidage du ruban 112 qui constitue la partie flexible de la lance 11, selon la largeur de l'empeignage, au fur et à mesure que la griffe 111 progresse en direction du côté du peigne 132 opposé à celui par lequel elle pénètre dans la foule.Each tab 133 is pierced with an orifice 133a comprising two extensions 133a 1 and 133a 2 of substantially complementary shapes of the upper and lower portions of the cross section of the strip 112, which makes it possible to obtain a guiding effect of the strip 112 which constitutes the flexible portion of the lance 11, according to the width of the upper, as the claw 111 progresses towards the side of the comb 132 opposite to that through which it enters the crowd.

De la même façon, une série S2 de pattes 136 est montée sur des consoles 137 fixées sur le battant 131, chaque patte 136 ayant un orifice dont deux extensions sont de formes complémentaires des parties haute et basse de la section transversale du ruban 122, ce qui permet de guider efficacement le ruban 122, qui constitue la partie flexible de la lance 12 engagée dans la foule F2, sans interaction avec le peigne 132.In the same way, a series S 2 of tabs 136 is mounted on brackets 137 fixed to the leaf 131, each tab 136 having an orifice of which two extensions are complementary in shape to the upper and lower parts of the cross section of the ribbon 122. which effectively guides the 122, which is the flexible portion of the lance 12 engaged in the crowd F 2 , without interaction with the comb 132.

Les rubans 112 et 122 sont pourvus chacun d'ouvertures 114, respectivement 124, destinées à engrener avec les dents 211, respectivement 221, de deux roues dentées 21, respectivement 22, entraînées, par des moyens non représentés, autour de deux axes A21 et A22 fixes par rapport au bâti 50 du métier et inclinés par rapport à un plan π1 médian entre les nappes N1 et N2 d'un angle α de l'ordre de 75°. En pratique, les axes A21 et A22 sont confondus, ce qui n'est cependant pas obligatoire.The strips 112 and 122 are each provided with openings 114, 124 respectively, intended to mesh with the teeth 211, respectively 221, of two toothed wheels 21, respectively 22, driven, by means not shown, about two axes A 21. and A 22 fixed relative to the frame 50 of the loom and inclined with respect to a median plane π 1 between the plies N 1 and N 2 of an angle α of the order of 75 °. In practice, the axes A 21 and A 22 are merged, which is however not mandatory.

De part et d'autre des roues 21 et 22, les rubans 112 et 122 sont guidés par des guides 31 et 32 représentés uniquement en traits mixtes à la figure 2.On both sides of the wheels 21 and 22, the ribbons 112 and 122 are guided by guides 31 and 32 shown only in broken lines at the figure 2 .

On note respectivement 1121 et 1221 les extrémités avant des rubans 112 et 122 sur lesquelles sont montées les griffes 111 et 121. Les rubans 112 et 122 sont flexibles sur la plus grande partie de leur longueur qui est pourvue des ouvertures 114 et 124, ceci afin de pouvoir s'enrouler sur les roues 21 et 22 sans générer de contraintes trop importantes. Pour ce faire, les rubans sont constitués dans un matériau composite. Au niveau des extrémités 1121 et 1221, le matériau composite est renforcé, sans affecter son encombrement, afin d'augmenter la rigidité de ces parties terminales des rubans 112 et 122. En effet, les extrémités ou parties terminales 1121 et 1221 n'ont pas à se déformer puisqu'elles ne viennent pas directement au contact des roues 21 et 22. Ces extrémités doivent, au contraire, présenter une géométrie bien définie permettant un guidage aisé au moyen des pattes 133 et 136.The front ends of the ribbons 112 and 122 are respectively marked 1121 and 1221, on which the claws 111 and 121 are mounted. The ribbons 112 and 122 are flexible over most of their length which is provided with the openings 114 and 124, in order to to be able to wind on the wheels 21 and 22 without generating too much stress. To do this, the tapes are made of a composite material. At the ends 1121 and 1221, the composite material is reinforced, without affecting its bulk, in order to increase the rigidity of these end portions of the strips 112 and 122. Indeed, the ends or end portions 1121 and 1221 do not have to deform since they do not come directly in contact with the wheels 21 and 22. These ends must, on the contrary, have a well-defined geometry allowing easy guidance by means of the tabs 133 and 136.

La liaison entre la griffe 111 et le ruban 112 doit être fiable et robuste afin de répondre aux sollicitations auxquelles elle est soumise.The connection between the claw 111 and the ribbon 112 must be reliable and robust in order to respond to the stresses to which it is subjected.

Comme il ressort plus particulièrement des figures 3 à 5, l'extrémité avant 1121 du ruban 112 est pourvue d'une fente longitudinale 1122 qui s'étend parallèlement à l'axe longitudinal X112 du ruban 112, cet axe étant confondu avec l'axe Y1 pour la partie du ruban 112 engagée dans les pattes 133. Un renfort 113 de forme globalement parallélépipédique est prévu pour être engagé dans la fente 1122. Le renfort 113 est pourvu de deux logements 1131 et 1132 en forme de fente s'étendant chacun dans une direction perpendiculaire à un axe longitudinal X113 du renfort 113, parallèle à la plus grande longueur du renfort 113. Le renfort 113 est également pourvu de deux perçages 1133 et 1134 qui relient deux faces opposées 1135 et 1136 du renfort 113 perpendiculaires à la face 1137 dans laquelle débouchent des logements 1131 et 1132.As is clear from the Figures 3 to 5 , the front end 1121 of the ribbon 112 is provided with a longitudinal slot 1122 which extends parallel to the longitudinal axis X 112 of the ribbon 112, this axis coinciding with the axis Y 1 for the portion of the ribbon 112 engaged in the tabs 133. A reinforcement 113 of generally parallelepipedal shape is provided to be engaged in the slot 1122. The reinforcement 113 is provided with two slots 1131 and 1132 in the form of slots each extending in a direction perpendicular to a longitudinal axis X 113 of the reinforcement 113, parallel to the greatest length of the reinforcement 113. The reinforcement 113 is also provided with two holes 1133 and 1134 which connect two opposite faces 1135 and 1136 of the reinforcement 113 perpendicular to the face 1137 in which the housings 1131 and 1132 open.

On note respectivement 1124 et 1125 les faces latérales du ruban 112 dans lesquelles débouchent les ouvertures 114. On note respectivement 1126 et 1127 les faces du ruban 112 perpendiculaires aux faces 1125 et 1124. Le ruban 112 est pourvu de deux perçages 1128 et 1129 qui relient les faces 1126 et 1127 et qui sont respectivement alignées avec les perçages 1133 et 1134 lorsque le renfort 113 est en place dans la fente 1122.1124 and 1125 respectively denote the lateral faces of the ribbon 112 into which the openings 114 open. The faces of the ribbon 112 perpendicular to the faces 1125 and 1124 are respectively noted 1126 and 1127. The ribbon 112 is provided with two holes 1128 and 1129 which connect the faces 1126 and 1127 and which are respectively aligned with the holes 1133 and 1134 when the reinforcement 113 is in place in the slot 1122.

Comme il ressort plus particulièrement de la figure 4, le perçage 1128 comprend une portion supérieure 1128a et une portion inférieure 1128b. Ces portions 1128a et 1128b sont respectivement séparées de la fente 1122 par des collerettes 1128c et 1128d comportant chacune une ouverture centrale.As is clear from the figure 4 , the bore 1128 comprises an upper portion 1128a and a lower portion 1128b. These portions 1128a and 1128b are respectively separated from the slot 1122 by flanges 1128c and 1128d each having a central opening.

Deux vis 115 sont prévues pour être insérées dans les perçages 1128 et 1129 par les portions 1128a et équivalente, alors que des écrous 116 pourvus de taraudages 116a sont reçus dans les portions 1128b. Les écrous 1116 sont avantageusement collés dans les portions 1128b, auquel cas ils peuvent être réalisés dans des bagues à section circulaire. Toutefois, si les écrous sont à section polygonale, comme représenté à la figure 5, ils sont avantageusement immobilisés dans les portions 1128b par coopération de formes, en plus d'un collage éventuel.Two screws 115 are provided to be inserted into holes 1128 and 1129 through portions 1128a and the like, while nuts 116 provided with threads 116a are received in portions 1128b. The nuts 1116 are advantageously bonded in the portions 1128b, in which case they can be made in circular section rings. However, if the nuts are polygonal in section, as shown in figure 5 they are advantageously immobilized in the portions 1128b by cooperation of shapes, in addition to a possible bonding.

La griffe 111 est représentée, pour l'essentiel, par sa silhouette aux figures 4 et 5. Elle est pourvue de deux pattes 1111 et 1112 destinées à être insérées respectivement dans les logements 1131 et 1132. Chaque patte 1111 et 1112 est percée d'un orifice 1113, respectivement 1114, de passage d'une des vis 115.The claw 111 is represented, for the most part, by its silhouette with Figures 4 and 5 . It is provided with two lugs 1111 and 1112 intended to be respectively inserted in the housings 1131 and 1132. Each lug 1111 and 1112 is pierced with an orifice 1113, respectively 1114, through which one of the screws 115 passes.

Les pattes 1111 et 1112 sont monobloc avec le reste de la griffe 111 qui est obtenue par mise en forme d'une tôle métallique.The lugs 1111 and 1112 are integral with the rest of the claw 111 which is obtained by forming a metal sheet.

Lors de la fabrication de la lance 11, le montage de la griffe 111 sur le ruban 112 est effectué en réalisant tout d'abord la fente 1122 puis en insérant le renfort 113 dans cette fente. Le renfort est alors immobilisé dans cette fente par collage. Dans cette configuration, le renfort 113 fait saillie latéralement par rapport aux faces 1125 et 1124 du ruban. L'extrémité 1121 a alors une section globalement en forme de croix.During the manufacture of the lance 11, the mounting of the claw 111 on the ribbon 112 is performed by first making the slot 1122 and inserting the reinforcement 113 in this slot. The reinforcement is then immobilized in this slot by gluing. In this configuration, the reinforcement 113 protrudes laterally by relative to the faces 1125 and 1124 of the ribbon. The end 1121 then has a generally cross-shaped section.

Selon un aspect avantageux de l'invention qui n'est pas représenté, en plus du collage, on immobilise le renfort 113 dans la fente 1122 au moyen de vis qui passent à travers des orifices ménagés dans l'une des branches de l'extrémité 1121 entre lesquelles est définie la fente 1122. Ces vis sont accessibles depuis la face 1126. Elles traversent le renfort 113 et sont serrées dans des taraudages ménagés dans la branche formant la face 1127. Ces vis s'inscrivent dans l'encombrement de l'extrémité 1121.According to an advantageous aspect of the invention which is not shown, in addition to the bonding, the reinforcement 113 is immobilized in the slot 1122 by means of screws which pass through orifices formed in one of the branches of the end 1121 between which is defined the slot 1122. These screws are accessible from the face 1126. They pass through the reinforcement 113 and are tightened in threads formed in the branch forming the face 1127. These screws are part of the bulk of the end 1121.

Lorsque le renfort est immobilisé dans la fente 1122, la griffe 111 est rapportée sur ce renfort en insérant ses pattes 1111 et 1112 dans les logements 1131 et 1132. On maligne alors respectivement les orifices et perçages 1113, 1133 et 1128, d'une part, 1114, 1134 et 1129, d'autre part.When the reinforcement is immobilized in the slot 1122, the claw 111 is attached to this reinforcement by inserting its lugs 1111 and 1112 into the housings 1131 and 1132. The holes and bores 1113, 1133 and 1128 are respectively maligned on the one hand. , 1114, 1134 and 1129, on the other hand.

Il est alors possible d'insérer, dans les perçages 1128 et 1129 et à travers les ouvertures centrales des collerettes 1128c et 1128d, les vis 115 et de les visser dans les écrous 116 préalablement immobilisés dans les portions 1128b. En variante, les écrous 116 peuvent être montés libres en rotation dans les portions 1128b, auquel cas ils sont immobilisés lors du serrage des vis 115.It is then possible to insert, into the holes 1128 and 1129 and through the central openings of the flanges 1128c and 1128d, the screws 115 and to screw them into the nuts 116 previously immobilized in the portions 1128b. In a variant, the nuts 116 can be rotatably mounted in the portions 1128b, in which case they are immobilized during the tightening of the screws 115.

Selon une autre variante, il est possible de rapporter la griffe 111 sur le rendort 113 avant de mettre en place et d'immobiliser celui-ci dans la fente 1122, les vis 115 étant ensuite vissées dans les écrous 116 comme expliqué ci-dessus.According to another variant, it is possible to report the claw 111 on the restort 113 before putting in place and immobilize it in the slot 1122, the screws 115 are then screwed into the nuts 116 as explained above.

Le serrage des vis 115 dans les écrous 116 permet d'exercer sur les pattes 1111 et 1112 à travers le renfort 113 un effort E1 de pincement qui garantit une immobilisation ferme de la griffe 111 par rapport au ruban 112.The tightening of the screws 115 in the nuts 116 makes it possible to exert on the lugs 1111 and 1112 through the reinforcement 113 a clamping force E 1 which guarantees a firm immobilization of the claw 111 with respect to the ribbon 112.

L'effort E1 exercé entre la tête de chaque vis 115 et écrou 116 correspondant s'exerce à travers les collerettes 1128c et 1128d, de telle sorte que les pattes 1111 et 1112, ainsi que le renfort 113 sont en quelque sorte pris « en sandwich » entre les deux bras de l'extrémité 1121 définis de part et d'autre de la fente 1122.The force E 1 exerted between the head of each screw 115 and corresponding nut 116 is exerted through the flanges 1128c and 1128d, so that the lugs 1111 and 1112, as well as the reinforcement 113 are somehow taken "in sandwich "between the two arms of the end 1121 defined on either side of the slot 1122.

La même construction est adoptée au niveau du perçage 1129 et l'effort de pincement est également exercé sur la patte 1112.The same construction is adopted at the level of the bore 1129 and the pinch force is also exerted on the leg 1112.

Le ruban 112 est avantageusement constitué à partir de fibres. Des fibres de renfort, telles que des fibres de carbone, sont prévues au niveau de l'extrémité 1121. Le renfort 113 peut être constitué à partir des mêmes fibres que le ruban 112 ou, selon un aspect particulièrement avantageux, exclusivement à partir de fibres de carbone, ce qui lui confère une bonne rigidité et une bonne légèreté. Les fibres des éléments 112 et 113 sont avantageusement moulées dans une matrice synthétique. Le collage entre les éléments 112 et 113 est d'autant plus efficace que leurs matériaux constitutifs sont proches, voire identiques.The ribbon 112 is advantageously made from fibers. Reinforcing fibers, such as carbon fibers, are provided at the end 1121. The reinforcement 113 can be made from the same fibers as the ribbon 112 or, in a particularly advantageous aspect, exclusively from fibers of carbon, which gives it a good rigidity and a good lightness. The fibers of the elements 112 and 113 are advantageously molded in a synthetic matrix. Bonding between the elements 112 and 113 is all the more effective as their constituent materials are close to, or even identical.

Comme il ressort plus particulièrement de la figure 4, chaque orifice 133a a globalement une forme de croix avec, comme expliqué précédemment, deux extensions 133a1 et 133a2 de formes sensiblement complémentaires des parties haute et basse du ruban 112, au voisinage des faces 1126 et 1127.As is clear from the figure 4 each orifice 133a generally has a cross shape with, as previously explained, two extensions 133a 1 and 133a 2 of substantially complementary shapes of the upper and lower portions of the strip 112, in the vicinity of the faces 1126 and 1127.

Chaque orifice 133a comprend également une extension latérale 133a3 et une fente 133a4 qui permettent le passage du renfort 113. Ainsi, comme représenté à la figure 3, chaque orifice 133a a une forme sensiblement complémentaire de la section transversale de l'extrémité 1121 équipée du renfort 113.Each orifice 133a also comprises a lateral extension 133a 3 and a slot 133a 4 which allow the reinforcement 113 to pass through. Thus, as shown in FIG. figure 3 each orifice 133a has a shape substantially complementary to the cross section of the end 1121 equipped with the reinforcement 113.

De façon analogue, la griffe 121 de la lance 12 est montée sur l'extrémité 1221 du ruban 122 au moyen d'un renfort immobilisé sur ce ruban et comprenant des logements de réception de pattes de montage de la griffe. De même, les orifices des pattes 136 ont des formes sensiblement complémentaires de la section transversale de l'extrémité avant du ruban 122 équipée de ce renfort.In a similar way, the claw 121 of the lance 12 is mounted on the end 1221 of the ribbon 122 by means of a reinforcement immobilized on this ribbon and comprising receiving receptacles for mounting tabs of the claw. Similarly, the orifices of the tabs 136 have substantially complementary shapes of the cross section of the front end of the ribbon 122 equipped with this reinforcement.

Dans le mode de réalisation représenté à la figure 6, les éléments analogues à ceux du premier mode de réalisation portent des références identiques. Ce mode de réalisation diffère du précédent en ce qu'il n'est pas prévu de collerette 1128d entre la portion 1128b du perçage 1128 et la fente 1122. Ainsi, l'écrou 116 porte directement contre la face inférieure 1136 du renfort 113 pour exercer l'effort de pincement E1.In the embodiment shown at figure 6 elements similar to those of the first embodiment bear identical references. This embodiment differs from the previous one in that it is not provided with a flange 1128d between the portion 1128b of the bore 1128 and the slot 1122. Thus, the nut 116 bears directly against the lower face 1136 of the reinforcement 113 to exert the pinching effort E 1 .

Dans le troisième mode de réalisation de l'invention représenté à la figure 7, les éléments analogues à ceux du premier mode de réalisation portent des références identiques. Dans ce mode de réalisation, la portion inférieure du perçage 1133 du renfort 113 est suffisamment large pour que l'écrou 116 porte directement contre la patte 1111, l'effort E1 étant exercé directement, sur cette patte, par l'écrou 116 et, sur le renfort 113 à travers la collerette 1128c, par la tête de la vis 115. Dans cette configuration, les déformations dues au serrage de la vis affectent une zone très réduite de l'extrémité 1121 et du renfort 113. Elles ne modifient pas la qualité du guidage de la lance 11 par les pattes 133.In the third embodiment of the invention shown in figure 7 elements similar to those of the first embodiment bear identical references. In this embodiment, the lower portion of drilling 1133 of the reinforcement 113 is sufficiently wide so that the nut 116 bears directly against the lug 1111, the force E 1 being exerted directly on this lug by the nut 116 and on the reinforcement 113 through the flange 1128c by the head of the screw 115. In this configuration, the deformations due to the tightening of the screw affect a very small area of the end 1121 and the reinforcement 113. They do not change the quality of the guide of the lance 11 by the legs 133.

Dans le quatrième mode de réalisation de l'invention représenté à la figure 8, les éléments analogues à ceux du premier mode de réalisation portent des références identiques. Dans ce mode de réalisation, il n'est pas prévu d'écrou mais un taraudage 116'a réalisé directement dans le ruban 112, au niveau de la portion 1128b du perçage 1128. Cette solution, quoi que légèrement moins robuste que les précédentes, permet d'économiser les écrous 116.In the fourth embodiment of the invention shown in figure 8 elements similar to those of the first embodiment bear identical references. In this embodiment, it is not provided with a nut but a tapping 116'a made directly in the ribbon 112, at the portion 1128b of the bore 1128. This solution, although slightly less robust than the previous ones, saves nuts 116.

Selon une variante non représentée de l'invention, l'effort de pincement E1 pourrait être exercé au moyen de rivets à la place des vis 115.According to a variant not shown of the invention, the clamping force E 1 could be exerted by means of rivets in place of the screws 115.

L'invention a été représentée lors de son utilisation dans un métier à tisser double nappe. Elle est toutefois applicable avec des métiers simple nappe.The invention has been shown when used in a double-tablecloth loom. It is however applicable with simple tablecloths.

Quel que soit le mode de réalisation, la griffe ou tête de la lance est démontable et peut être remplacée indépendamment du ruban. Dans le cas où l'on utilise des vis et des taraudages, tels que les éléments 115 et 116a ou 116'a, ces éléments sont réutilisables.Whatever the embodiment, the claw or head of the lance is removable and can be replaced independently of the tape. In the case where screws and tappings, such as elements 115 and 116a or 116'a, are used, these elements are reusable.

Claims (15)

  1. Rapier (11, 12) for insertion of weft threads (51, 52) for a loom (M), the rapier comprising a flexible part (112, 122) and a claw (111, 121) for catching of a weft thread, which claw is secured to an end (1121, 1221) of the flexible part, characterised in that the end (1121, 1221) of the flexible part (112, 122) comprises a longitudinal slot (1122) in which there is immobilised a reinforcement (113), this reinforcement being provided with at least one receptacle (1131, 1132) for receipt of a lug (1111, 1112) for fitting of the claw (111, 121), and in that the lance comprises means (115, 116; 116'a) for immobilisation of the or each lug of the claw in the corresponding receptacle.
  2. Rapier according to claim 1, characterised in that the means (115, 116; 116'a) for immobilisation can exert a force (E1) of gripping of the or each lug (1111, 1112) in the corresponding receptacle (1131, 1132).
  3. Rapier according to one of the preceding claims, characterised in that the means for immobilisation comprise at least one screw (115) which can co-operate with a female thread (116a; 116'a) which is fitted or provided at the end (1121, 1221) of the flexible part (112, 122).
  4. Rapier according to claim 3, characterised in that the female thread (116a) is formed in a nut (116) which is added onto the end (1121, 1221) of the flexible part (112, 122).
  5. Rapier according to claim 4, characterised in that the nut (116) is immobilised in rotation relative to the axis of its female thread (116a) on the end (1121, 1221) of the flexible part.
  6. Rapier according to one of claims 4 or 5, characterised in that the nut bears on a portion (1128d) of the end (1121, 1221) of the flexible part (112, 122), supported against the reinforcement (113), when the screw (115) is tightened in the female thread (116a) .
  7. Rapier according to one of claims 4 or 5, characterised in that the nut (116) bears against an outer surface (1136) of the reinforcement (113) at the level of the receptacle (1131, 1132), when the screw (115) is tightened in the female thread (116a).
  8. Rapier according to one of claims 4 or 5, characterised in that the nut (116) bears against the lug (1111, 1112) in place in the receptacle (1131, 1132) when the screw (115) is tightened in the female thread (116a).
  9. Rapier according to claim 3, characterised in that the female thread (116'a) is provided in a portion (1128b) of the end (1121, 1221) of the flexible part (112, 122) .
  10. Rapier according to either of claims 1 or 2, characterised in that the means for immobilisation comprise at least one rivet.
  11. Rapier according to one of the preceding claims, characterised in that the reinforcement (113) in place in the slot (1122) projects on both sides of the end (1121, 1221) of the flexible part (112, 122).
  12. Device for insertion of weft threads for a loom (M) comprising at least one rapier (11, 12) according to one of the preceding claims, and a comb (131) which is equipped with means (133, 136) distributed according to its length, for guiding of the flexible part (112, 122) of each rapier.
  13. Device according to claim 12, characterised in that the guide means comprise a series of lugs (133, 136), each provided with an aperture (133a) for passage of the flexible part (112, 122), this aperture being substantially complementary to the transverse cross-section of the end (1121) of the flexible part (112, 122) of the rapier (11, 12) equipped with the reinforcement (113).
  14. Loom (M) equipped with a rapier (11, 12) according to one of claims 1 to 11, or with a device (11, 12, 21, 22, 31, 32) for insertion of weft threads according to one of claims 12 or 13.
  15. Method for production of a rapier (11, 12) for insertion of weft threads (51, 52) for a loom (M), the rapier comprising a flexible part (112, 122) and a claw (111, 121) for catching of a weft thread, which claw is secured to an end (1121, 1221) of the flexible part, characterised in that it comprises steps consisting of:
    a) providing a longitudinal slot (1122) in the end of the flexible part;
    b) putting into place in the slot a reinforcement (113) which is provided with at least one receptacle (1131, 1132);
    c) immobilising the reinforcement (113) in the slot (1122);
    d) inserting in at least one of the receptacles of the reinforcement a lug (1111, 1112) for fitting of the claw (111, 112);
    e) immobilising the lug in its receptacle by means of a gripping force (E1).
EP20070356091 2006-07-07 2007-07-06 Rapier, method of manufacturing same, device for inserting weft yarns comprising such a rapier and loom equipped with such a device Expired - Fee Related EP1876273B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0606210A FR2903425B1 (en) 2006-07-07 2006-07-07 LANCE, ITS MANUFACTURING METHOD, INSERTION DEVICE FOR FRAME WIRES COMPRISING SUCH A LANCE, AND A WEAVING MACHINE COMPRISING SUCH A DEVICE

Publications (2)

Publication Number Publication Date
EP1876273A1 EP1876273A1 (en) 2008-01-09
EP1876273B1 true EP1876273B1 (en) 2009-06-24

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EP20070356091 Expired - Fee Related EP1876273B1 (en) 2006-07-07 2007-07-06 Rapier, method of manufacturing same, device for inserting weft yarns comprising such a rapier and loom equipped with such a device

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EP (1) EP1876273B1 (en)
CN (1) CN101100782B (en)
DE (1) DE602007001363D1 (en)
FR (1) FR2903425B1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102912533B (en) * 2012-10-31 2013-09-18 常熟市常纺纺织机械有限公司 Weft insertion mechanism of rapier loom
CN102912532B (en) * 2012-10-31 2014-03-26 常熟市常纺纺织机械有限公司 Weft insertion mechanism of rapier loom for weaving double cloth
CN103306016B (en) * 2013-05-07 2014-05-14 常熟市常纺纺织机械有限公司 Rapier loom weft insertion mechanism for weaving double-woven fabric
CN103668717A (en) * 2013-12-04 2014-03-26 杭州利宝纺织机械有限公司 Flexible rapier loom
BE1023978B1 (en) * 2016-03-25 2017-09-28 Picanol N.V. GRIPPER FOR A GRIPPER WEAVING MACHINE
CN106987963B (en) * 2017-04-10 2019-01-18 湖州现代纺织机械有限公司 A kind of bilayer zone hole fabric and its method for weaving
CN106884254B (en) * 2017-04-10 2018-07-03 湖州现代纺织机械有限公司 It is a kind of to be used to knit the loom structure for taking double-layer air-permeable fabric
CN106868686B (en) * 2017-04-10 2018-06-15 湖州现代纺织机械有限公司 It is a kind of to be used to knit the rapier loom for taking double-layer air-permeable fabric
CN108728990B (en) * 2018-08-13 2024-02-27 李红旗 Rapier mechanism and Shan Jiangan widened carbon fiber loom

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US4605045A (en) * 1985-09-13 1986-08-12 Wu Lien Shin Gripping apparatus for shuttleless looms
IT1228493B (en) * 1989-01-20 1991-06-19 Nuovo Pignone Spa IMPROVEMENTS IN THE ANCHORING SYSTEM OF THE GRIPPER SUPPORT TO THE CONVEYOR BELT IN A TEXTILE FRAME.
BE1004305A3 (en) * 1989-07-06 1992-10-27 Picanol Nv Rapier WITH LANCE GUIDANCE.
CN2066449U (en) * 1990-04-26 1990-11-28 张松茂 Gripper head for looms
CN1026903C (en) * 1990-11-12 1994-12-07 黄仁德 Improved woof-carrier for high-speed shuttle less loom
BE1007003A3 (en) * 1993-04-15 1995-02-14 Picanol Nv A weaving machine provided with LANS AND GUIDANCE RESOURCES.
JPH06299440A (en) * 1993-04-13 1994-10-25 Ishikawa Seisakusho Ltd Weft transport member and weft transport member guide of rapier loom
IT1272408B (en) * 1993-05-05 1997-06-23 Vamatex Nuova Spa GRIPPER TAPE FOR WEAVING FRAMES
BE1013013A3 (en) * 1998-10-29 2001-07-03 Picanol Nv GRAB STRAP FOR A rapier.
IT1304698B1 (en) * 1998-12-23 2001-03-28 Somet Soc Mec Tessile PAIR OF CARRIER AND TRACTOR PLIERS FOR WEAVING FRAMES
ES2289073T3 (en) * 2002-08-30 2008-02-01 Promatech S.P.A. IMPROVEMENTS IN THE CONVEYOR CLAMPS OF THE FRAMEWORK FOR FABRIC TELARS AND IN FABRICS FABRICS WITH GUIDE MEANS FOR THEM.
CN2670394Y (en) * 2003-12-24 2005-01-12 翟凤珍 Rapier with replaceable head

Also Published As

Publication number Publication date
CN101100782A (en) 2008-01-09
FR2903425B1 (en) 2008-08-29
CN101100782B (en) 2011-04-27
FR2903425A1 (en) 2008-01-11
DE602007001363D1 (en) 2009-08-06
EP1876273A1 (en) 2008-01-09

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