EP3839115B1 - Heddle for weaving loom and harness provided with such a heddle - Google Patents

Description

The invention relates to a heddle for guiding a warp thread for a weaving loom, as well as to a harness for a Jacquard-type loom equipped with such a heddle.

The technical field of the invention is that of the formation of the shed on a loom, by means of heddles which each comprise an eyelet for the passage of one or more warp threads and which each make it possible to vertically move one or more warp yarns, to form a crowd of passage of weft yarns. Such heddles are located next to each other on the loom, with a high density, which induces friction between a heddle and the warp threads passing through the eyelets of the adjacent heddles.

It is known from EP-A-3 009 544 to produce a heddle from a heddle body, which comprises at least one strand, and a link, which includes an eyelet. The heddle body and the link each comprise at least one housing and these housings extend along the same transverse axis, facing one another, together forming a pair of housings. A solidified resin assembly member is placed in this pair of housings. This assembly member ensures good transmission of the longitudinal connection forces, between the link and the heddle body, like rivets. This rail is generally satisfactory.

However, a strand of the heddle body and the link are overlapping, which creates abrupt transition zones between the strand and the link. These transition zones and the heads of the rivets formed by the assembly members are capable of forming hooking reliefs for the warp threads adjacent to the heddle, during weaving. This therefore results in a risk of breakage or damage to the warp threads in a weaving loom equipped with such a heddle.

It is these problems that the invention more particularly intends to remedy by proposing a new heddle for a weaving loom, with which the risks of snagging neighboring warp threads during weaving are greatly reduced, or even eliminated.

• par la portion du contour de l'orifice traversant de la première pièce; et
• par une portion d'un bord périphérique de la deuxième pièce, qui est disposé, par rapport à l'interface de recouvrement, sur un deuxième côté transversal.

Enfin, la zone de passage est traversée par de la résine solidifiée qui s'étend contre la portion du bord périphérique délimitant la zone de passage.To this end, the invention relates to a heddle for guiding a warp thread for a loom, this heddle extending in length along a longitudinal axis and comprising a link, with an eyelet for passing the warp thread, a heddle body, with at least one strand which extends along the longitudinal axis, and at least one assembly member between the link and the strand, this assembly member being made of solidified resin and arranged in a pair of housing formed by a housing formed in the link and a housing formed in the strand. The dwellings of the pair of dwellings face each other according to a direction parallel to an axis transverse to the longitudinal axis and are arranged on either side of an overlap interface, at which the link and the strand overlap along the transverse axis. A housing of the pair of housings crossing right through, along the transverse axis, the strand or the link, in which this housing is formed and being arranged, with respect to the covering interface, on a first transverse side. A first part among the link and the strand is provided with at least one orifice, of closed contour, crossing the first part right through, along the transverse axis. In accordance with the invention, at least a portion of the closed contour is defined outside the vis-à-vis, along the transverse axis, with a solid part of the second part among the link and the strand and outside the vis-à-vis. opposite, also along the transverse axis, with a housing of the second part which belongs to a pair of housings. In addition, a passage area is delimited

• by the portion of the contour of the through hole of the first part; and
• by a portion of a peripheral edge of the second part, which is arranged, relative to the covering interface, on a second transverse side.

Finally, the passage zone is traversed by solidified resin which extends against the portion of the peripheral edge delimiting the passage zone.

Thanks to the invention, the passage zone facilitates the diffusion of the resin which has not yet solidified in the vicinity of the external faces of the smooth. In particular, the resin may be deposited on only one transverse side of the assembly formed by the link and the strand and be distributed at the level of the peripheral edge of the second part, on the opposite transverse side of the heddle, the other side of the overlay interface. This makes it possible to encapsulate part of the link and/or of the strand which could constitute a relief for attaching the neighboring warp threads, when the heddle is used on a loom, in particular within a Jacquard harness. The risks of snagging are therefore reduced, without interfering with the filling of the pairs of housings in which the assembly members are formed.

• Le logement traversant du couple de logements forme également l'orifice traversant de la première pièce qui délimite la zone de passage.
• Le logement traversant est commun à deux couples de logements.
• Le logement traversant est délimité par au moins une surface de butée avant proximale, une surface de butée arrière distale, une surface de butée arrière intermédiaire et une surface de butée avant intermédiaire.
• Sur la première pièce, l'orifice traversant est en vis-à-vis, selon l'axe transversal, de la portion du bord périphérique de la deuxième pièce délimitant la zone de passage.
• L'orifice traversant de la première pièce est en vis-à-vis selon l'axe transversal d'une extrémité longitudinale distale de la deuxième pièce.
• La résine solidifiée qui traverse la zone de passage s'étend depuis une surface externe de la première pièce et jusqu'à une surface externe transversale de la deuxième pièce, ces surfaces externes étant disposées d'un même côté transversal par rapport à l'interface de recouvrement.
• Au moins une de ces surfaces externes est inclinée par rapport à l'axe longitudinal en direction de la zone de passage.
• La résine solidifiée qui traverse la zone de passage s'étend au contact d'une autre portion du bord périphérique de la deuxième pièce, qui est en vis-à-vis, selon l'axe transversal, d'une partie pleine de la première pièce.
• La résine solidifiée qui traverse la zone de passage est monobloc avec l'organe d'assemblage.
• Au moins une surface externe du maillon et/ou du brin qui est en contact avec la résine comporte une entaille de limitation de la diffusion de la résine.
• Une partie d'extrémité longitudinale de la deuxième pièce est dépourvue de parois latérales, alors que la première pièce est en recouvrement, selon l'axe transversal, de l'extrémité longitudinale au niveau d'une unique interface de recouvrement et que le logement traversant du couple de logements est ménagé dans la première pièce, parmi le maillon et le brin.
• La première pièce est le maillon et la deuxième pièce est le brin.
• Une patte longitudinale du maillon est reçue dans une cavité proximale du brin définie entre un fond, un plafond et deux parois latérales, alors que deux trous sont ménagés dans le brin et débouchent chacun dans la cavité proximale et sur une surface externe du brin et qu'une extrémité libre de la patte longitudinale est décalée, le long de l'axe longitudinal, par rapport aux deux trous, en étant plus proche de l'embouchure de la cavité proximale que les deux trous.

According to advantageous but non-obligatory aspects of the invention, such a heald can incorporate one or more of the following characteristics, taken according to any technically admissible combination:

• The through-housing of the pair of housings also forms the through-orifice of the first part which delimits the passage zone.
• The through housing is common to two pairs of housings.
• The through housing is delimited by at least a proximal front abutment surface, a distal rear abutment surface, an intermediate rear abutment surface and an intermediate front abutment surface.
• On the first part, the through orifice faces, along the transverse axis, the portion of the peripheral edge of the second part delimiting the passage zone.
• The through orifice of the first part is facing each other along the transverse axis of a distal longitudinal end of the second part.
• The solidified resin which passes through the passage zone extends from an external surface of the first part and to an external transverse surface of the second part, these external surfaces being arranged on the same transverse side with respect to the interface recovery.
• At least one of these external surfaces is inclined with respect to the longitudinal axis in the direction of the passage zone.
• The solidified resin which passes through the passage zone extends in contact with another portion of the peripheral edge of the second part, which is opposite, along the transverse axis, a solid part of the first room.
• The solidified resin which passes through the passage zone is integral with the assembly member.
• At least one outer surface of the link and/or of the strand which is in contact with the resin comprises a notch for limiting the diffusion of the resin.
• A longitudinal end part of the second part has no side walls, whereas the first part overlaps, along the transverse axis, the longitudinal end at the level of a single overlapping interface and the through housing of the pair of housings is arranged in the first part, between the link and the strand.
• The first piece is the link and the second piece is the strand.
• A longitudinal tab of the link is received in a proximal cavity of the strand defined between a bottom, a ceiling and two side walls, while two holes are formed in the strand and each open into the proximal cavity and onto an external surface of the strand and that a free end of the longitudinal leg is offset, along the longitudinal axis, with respect to the two holes, being closer to the mouth of the proximal cavity than the two holes.

The invention also relates to a harness for a loom of the Jacquard type, equipped with several heddles for guiding a warp thread. This harness is characterized in that at least one of these guide rails is as mentioned above.

This harness works on the Jacquard loom with less risk of warp yarn snagging than known harnesses.

• [Fig 1] La figure 1 est une vue en élévation d'une lisse de guidage d'un fil de chaîne pour un métier à tisser de type Jacquard, conforme à un premier mode de réalisation de l'invention ;
• [Fig 2] La figure 2 est une vue à plus grande échelle d'un maillon de la lisse de la figure 1, vu du côté opposé à celui visible à la figure 1;
• [Fig 3] La figure 3 est une vue en perspective, selon deux angles différents et à plus grande échelle, d'une extrémité d'un brin de la lisse de la figure 1 ;
• [Fig 4] La figure 4 est une vue à plus grande échelle du détail IV à la figure 1 ;
• [Fig 5] La figure 5 est une vue du même détail, après mise en place et solidification de la résine ;
• [Fig 6] La figure 6 est une vue de la même partie de la lisse que celle représentée aux figures 4 et 5, regardée par le côté opposé de la lisse ;
• [Fig 7] La figure 7 est une vue de la même partie de la lisse vue du côté de la figure 6, après solidification de la résine ;
• [Fig 8] La figure 8 est une coupe de détail selon la ligne VIII-VIII à la figure 4 ; on y a indiqué, respectivement avec les flèches IV et VI, les directions d'observation de la lisse aux figures 4 et 6 ;
• [Fig 9] La figure 9 est une coupe de détail selon la ligne IX-IX à la figure 5 ; on y a indiqué, respectivement avec les flèches V et VII, les directions d'observation de la lisse aux figures 5 et 7 ;
• [Fig 10] La figure 10 est une vue analogue à la figure 4 pour une lisse conforme à un deuxième mode de réalisation de l'invention.
• [Fig 11] La figure 11 est une vue de la même partie de la lisse que celle représentée à la figure 10, regardée par le côté opposé de la lisse ; la figure 11 est donc une vue analogue à la figure 6 pour la lisse de la figure 10.
• [Fig 12] La figure 12 est une coupe à plus grande échelle selon la ligne XII-XII à la figure 11 après solidification de la résine ; on y a indiqué, respectivement avec les flèches X et XI, les directions d'observation de la lisse aux figures 10 et 11 ; la figure 12 est comparable à la figure 9 ;
• [Fig 13] La figure 13 est une coupe à plus grande échelle selon la ligne XIII-XIII à la figure 11, après solidification de la résine ;
• [Fig 14] La figure 14 est une représentation schématique d'un métier à tisser de type Jacquard conforme à l'invention et incorporant une des lisses représentées aux figures 1 à 13 et un harnais conforme à l'invention.

The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of two embodiments of a heddle and one embodiment of a harness for a loom conforming to its principle, given solely by way of example and made with reference to the appended drawings in which:

• [ Fig 1 ] The figure 1 is an elevational view of a heddle for guiding a warp thread for a Jacquard-type loom, in accordance with a first embodiment of the invention;
• [ Fig 2 ] The figure 2 is a larger-scale view of a link in the stringer of the figure 1 , seen from the side opposite to that visible at the figure 1 ;
• [ Fig.3 ] The picture 3 is a perspective view, from two different angles and on a larger scale, of one end of a strand of the stringer figure 1 ;
• [ Fig 4 ] The figure 4 is a larger scale view of detail IV at the figure 1 ;
• [ Fig.5 ] The figure 5 is a view of the same detail, after placement and solidification of the resin;
• [ Fig 6 ] The figure 6 is a view of the same part of the rail as that shown in figure 4 and 5 , viewed from the opposite side of the stringer;
• [ Fig 7 ] The figure 7 is a view of the same part of the stringer seen from the side of the figure 6 , after solidification of the resin;
• [ Fig.8 ] The figure 8 is a detail section along line VIII-VIII at figure 4 ; there are indicated, respectively with the arrows IV and VI, the directions of observation from the rail to the figure 4 and 6 ;
• [ Fig.9 ] The figure 9 is a detail section along the line IX-IX at the figure 5 ; there are indicated, respectively with the arrows V and VII, the directions of observation from the rail to the figure 5 and 7 ;
• [ Fig. 10 ] The figure 10 is a view analogous to figure 4 for a heald according to a second embodiment of the invention.
• [ Fig.11 ] The figure 11 is a view of the same part of the rail as that shown in figure 10 , viewed from the opposite side of the stringer; the figure 11 is therefore a view analogous to the figure 6 for the smoothness of the figure 10 .
• [ Fig. 12 ] The figure 12 is a section on a larger scale along the line XII-XII at the figure 11 after solidification of the resin; there are indicated, respectively with the arrows X and XI, the directions of observation from the rail to the figure 10 and 11 ; the figure 12 is comparable to the figure 9 ;
• [ Fig. 13 ] The figure 13 is a section on a larger scale along the line XIII-XIII at the figure 11 , after solidification of the resin;
• [ Fig. 14 ] The figure 14 is a schematic representation of a loom of the Jacquard type in accordance with the invention and incorporating one of the healds represented in figures 1 to 13 and a harness according to the invention.

The Jacquard-type loom M shown in the figure 14 is equipped with a Jacquard mechanism 102 which controls several hooks 104, a lower end of which is associated with several arcades 106. A lower end 106a of each arcade 106 is connected to an upper end 1a of a guide rail 1 of a wire of chain. Each heald 1 is subjected to the action of a return spring 108 fixed to a hooking beam 110 by a rod 112, the beam 110 being secured to a frame of the loom M. The various arches 106 are distributed over the width of the loom by crossing holes made in a stuffing board 114. The elements 1 and 106 to 114 form a harness H belonging to the loom M and controlled by the Jacquard mechanism 102.

The figures 1 to 9 show a first embodiment of a guide heddle 1 for a warp thread of the harness H on the loom M.

The smooth guide 1 extends in length along a longitudinal axis X1 and comprises a smooth body 10 and a link 2. The smooth body 10 comprises two strands 4 which are distinct and arranged on either side of the link 2 , along the X1 axis.

We denote Y1 and Z1 two axes of the rail 1 which are perpendicular to the axis X1. The Y1 axis extends along the width of the link 2, while the Z1 axis extends along the thickness of the link 2. The Y1 axis constitutes a lateral axis for the rail 1, while the Z1 axis constitutes a transverse axis.

At each end, the smooth body 10 has hooking means 11A or 11B, respectively designed to cooperate with a yoke 106 or a spring 108. At a first end of the smooth body 10, which corresponds to the upper end 1a of the heddle and at one end of a strand 4 opposite to the link 4, the hooking means 11A comprise an end piece 12 which forms an opening 14 for passage and wedging of the yoke 106, as well as a tube 16 mounted around the strand 4, with the possibility of translation along the axis X1. The attachment means 11A are preferably in accordance with the teaching of EP-B-1 741 815 . At a second end of the body 10 opposite the first end, which corresponds to the lower end 1b of the heddle and at one end of a strand 4 opposite the link 4, the connection means 11B comprise an external thread 18 which is intended to be screwed into a spring 108 and a slip damper 19.

The strands 4 are identical to each other, except at the level of the attachment means 11A and 11B.

The link 2 is formed from a sheet of single-thickness metal, preferably stainless steel. It extends along a longitudinal axis X2. Y2 denotes a lateral axis along which extends the width of link 2 and Z2 a transverse axis along which extends the thickness of this link. In the assembled configuration of the rail 1, the axes X2, Y2 and Z2 coincide with the axes X1, Y1 and Z1 respectively.

The link 2 includes a central portion 20 which has lateral edges 21 rounded by polishing and which defines an eyelet 22 for the passage of a warp thread, with rounded edges. This eyelet 22 crosses link 2 right through along axis Z2. The axes X2, Y2 and Z2 are concurrent at the center of the eyelet 22 which is rectangular in shape in the main plane of the link 2, which is the median plane of the central portion 20 and contains the axes X2 and Y2.

The link 2 also includes two longitudinal lugs 24 which extend it, along the axis X2, at its two opposite longitudinal ends. The lugs 24 each have a reduced width compared to the width of the central portion 20. Between the central portion 20 and the lugs 24, the width of the link measured along the axis Y2 gradually decreases as it approaches the lugs 24 and the edges 21 of the central portion 20 are extended by rounded curved edges 25 which delimit between them a zone 26 of transition between the central part 20 and a tab 24.

Note 28 and 29 respectively the external transverse faces of the link 2, parallel to the axes X2 and Y2. The transverse face 28 is visible to figure 1 , 4 and 5 , while the transverse face 29 is visible to figure 2 , 6 and 7 .

On each of the transverse faces 28 and 29, at the level of the junction between the central part 20 and one of the transition zones 26, along the axis X2, a notch 30 is provided. Two notches 30 are thus provided on the transverse face 28 and two notches 30 on the transverse face 29, on either side of the eyelet 22 along the axis X2. The notches 30 are provided on the side faces 28 and 29 at the same level along the axis X2. Thus, as seen in figure 8 , the notches 30 provided on the transverse faces 28 and 29 are aligned along the axis X2. Each notch 30 is obtained by cold heading the link 2, this cold heading operation preferably taking place at the same time as the cutting of this link 2 during which the edges 21, the eyelet 22 and the edges 25. Each notch 30 preferably has a depth of the order of 0.05 mm and a triangular or semi-circular section.

Each notch 30 extends in a plane perpendicular to axis Z2 and is parallel to axis Y2. We note ℓ30 the length of a notch 30 measured parallel to the axis Y2. We note ℓ2 the width of the link 2 measured parallel to this same axis Y2. The ratio ℓ30 to ℓ2 is preferably between 0.6 and 0.95, with a preferred value equal to 0.8. In other words, each notch 30 extends over 60 to 95% of the width ℓ2 of the link 2, preferably over approximately 80% of this width. As they do not extend as far as the ridges 21 and the edges 25, the ridges do not substantially reduce the mechanical strength of the link 2.

In each of the transition zones 26 is formed an elongated housing 32 which constitutes an orifice of the link 2 and crosses the link 2 right through between the transverse faces 28 and 29, that is to say parallel to the axis Z2 , and whose largest dimension extends along the longitudinal axis X2.

Each elongated housing 32 comprises a first lobe 322 and a second lobe 324 which communicate with each other along the axis X2. Each housing 32 is thus generally in the shape of a keyhole. At the end of the manufacture of the heddle 1, and as emerges from the explanations which follow, a quantity of solidified resin is received in each of the lobes 322 and 324.

The elongated housings 32 are symmetrical to one another with respect to a plane containing the axes Y2 and Z2. Furthermore, each elongated housing 32 is symmetrical with respect to a plane containing the axes X2 and Z2.

• une surface de butée avant proximale 323 centrée sur l'axe X2 et qui délimite le logement allongé 32 du côté du maillon 22,
• une surface de butée arrière distale 325 également centrée sur l'axe X2 et qui délimite le logement 32 du côté de la patte longitudinale 24 adjacente,
• deux surfaces de butée arrière intermédiaires 327 disposées de part et d'autre de l'axe X2 et
• quatre surfaces de butée avant intermédiaires 329 réparties, deux par deux, de part et d'autre de l'axe X2 et, deux par deux, de part et d'autre des surfaces de butée arrière intermédiaires 327, le long de l'axe X2.

Each housing 32 is delimited by a closed contour which defines, in the thickness of the link 2, several abutment surfaces which are oriented towards one or the other of the longitudinal directions of the link, namely:

• a proximal front abutment surface 323 centered on the axis X2 and which delimits the elongated housing 32 on the side of the link 22,
• a distal rear abutment surface 325 also centered on the axis X2 and which delimits the housing 32 on the side of the adjacent longitudinal leg 24,
• two intermediate rear abutment surfaces 327 arranged on either side of the axis X2 and
• four intermediate front abutment surfaces 329 distributed, two by two, on either side of the axis X2 and, two by two, on either side of the intermediate rear abutment surfaces 327, along the axis X2.

The abutment surfaces 323 and 329 each form a portion of the contour of the housing 32 and are oriented towards the free longitudinal end 242 of the tab 24 adjacent. The abutment surfaces 325 and 327 also each form a portion of the outline of the housing 32 and are oriented towards the eyelet 22. An intermediate rear abutment surface 327 extends, along the axis X2, between two abutment surfaces intermediate front 329. The intermediate rear abutment surfaces 327 define a narrowing of the dimension along the Y2 axis of the elongated housing 32, between the two lobes 322 and 324.

L32 denotes the length of an elongated housing 32, measured parallel to the axis X2.

Each strand 4 is made of synthetic material, more particularly plastic. For example, this plastic material can be an injection molded polyamide 6.6, with or without additive.

Note 42 an end portion of a strand 4 by which this strand is secured to the link 2, opposite the attachment means 11A or 11B. This end portion 42 is shown, in perspective and from two different angles, at the picture 3 .

Each strand 4 extends along a longitudinal axis X4. Two axes Y4 and Z4 are defined perpendicular to the axis X4 and between them. In the assembled configuration of the rail 1 the axes X4, Y4 and Z4 are respectively coincident with the axes X1, Y1 and Z1.

Each strand has, at its end portion 42, a proximal cavity 44 defined between a bottom 442, a ceiling 444 and two side walls 446. In the example, a flat surface S442 of the bottom 442, which delimits the proximal cavity 44 , is parallel to the axes X4 and Y4, as is the lower surface S444 of the ceiling 444, which also delimits this cavity, on its opposite side. The internal surfaces S446 of the side walls 446 are, for their part, generally parallel to the axes X4 and Z4. The surface S442 forms a face covering the link 2 by the strand 4, as emerges from the explanations which follow.

The bottom 442 is extended, in the direction of a distal longitudinal end 46 of the strand 4, by a longitudinal end part in the form of a plate 48 which can be considered as delimiting a distal cavity devoid of ceiling and side walls. . The plate 48 is flat. A flat surface S48 of the plate 48 is defined, parallel to the axes X4 and Y4 and arranged in the extension of the surface S442 of the bottom 442. The surface S48 constitutes a face covering the link 2 by the strand 4, as emerges from the explanations that follow.

We note S4 the union of surfaces S442 and S48 Such a union of surfaces S4 is identified by a hatched zone, in the upper part of the picture 3 , in the terminal portion 42 of the strand 4. As emerges from the explanations which follow, this joining of surfaces S4 constitutes an overall covering face of the link 2, provided on the strand 4.

Note 484 the peripheral edge of the plate 48. This edge 484 is rounded. Distal longitudinal end 46 is formed at the intersection of edge 484 and axis X4.

On the side of the plate 48, the ends of the ceiling 444 and of the walls 446 form a surface S44 which surrounds the mouth of the proximal cavity 44 on the side of the distal longitudinal end 46 and which is inclined in the direction of the plate 48 and of this distal longitudinal end 46. We note α the angle of convergence of the surface S44 with respect to the axis X4, taken in the solid part of the strand 4, towards the longitudinal end 46, in the plane of the figure 8 . This angle, visible at the figure 8 , has a value between 15° and 45°, preferably equal to 30°.

Two circular holes 52 and 54 are respectively provided in the bottom 442 and in the ceiling 444 and extend as far as an outer peripheral surface 56 of the strand 4. Along the axis X4, the holes 52 and 54 are aligned. They each extend along an axis A52 or A54 which is perpendicular to the axis X4, in the example parallel to the axis Z4, which is not compulsory. The axes A52 and A54 are preferably coincident. Each of these holes 52 and 54 is advantageously tapered and flared away from the axis X4, that is to say in the direction of the outer peripheral surface 56.

The holes 52 and 54 both open into the proximal cavity 44 which they connect to the outside, in the vicinity of an end wall 449 of this opposite cavity, along the axis X4, at its mouth and at the longitudinal and distal end 46 of strand 4.

On the outside, the hole 52 opens into a countersink 58 of elongated shape, the largest dimension of which is parallel to the axis X4. For its part, the hole 54 opens into another counterbore 60, diametrically opposite to the counterbore 58 and having an axial length, parallel to the axis X4, less important than that of the counterbore 58.

As seen at figure 8 , an axial offset d4 is provided, along the axis X4, between the wall 449 and the outlet of the hole 52 in the cavity 44. In practice, the value of this axial offset is between 0.1 and 0.5 mm, preferably of the order of 0.15mm. An axial offset of the same order of magnitude is provided between the end wall 449 and the outlet of the hole 54 in the cavity 44.

The plate 48 is pierced with two circular orifices 62 and 64 which pass right through it, along the axis Z4, between its surface S48 and a counterbore 66 made on the outer peripheral surface 56. The two orifices 62 and 64 are offset , along the axis X4, the orifice 62 being closer to the distal longitudinal end 46 than the orifice 64. The orifice 62 can thus be qualified as “distal”, whereas the orifice 64 is qualified of "proximal".

The bottom surface S66 of the counterbore 66 is part of the outer peripheral surface 56 of the strand 4 and converges towards the axis X4 approaching the distal longitudinal end 46. In other words, the bottom surface S66 is inclined relative to the X4 axis and leaning towards the distal longitudinal end 46 and the X4 axis. We note β the angle of convergence of the bottom surface S66 with respect to the axis X4, taken in the solid part of the strand 4, towards the longitudinal end 46, in the plane of the figure 8 . This angle, also visible at the figure 8 , has a value between 5° and 15°, preferably equal to 5°.

The surfaces S44 and S66 converge in the direction of the distal longitudinal end 46 with an angle of convergence between them equal to the sum of the angles α and β.

When assembling the heddle 1, each longitudinal lug 24 of the link 2 is engaged in the proximal cavity 44 of a strand 4 of the body of the heddle 10, through its mouth, making the axes X1, X2, X4 coincide. , the Y1, Y2, Y4 axes, and the Z1, Z2, Z4 axes. Each tab 24 is positioned along the axis X1 such that its free longitudinal end 242 is offset axially, along the axis X1, relative to the holes 52 and 54, being closer to the mouth of the proximal cavity than the holes 52 and 54. In practice, the free longitudinal end 242 is located opposite the end wall 449 with respect to the axes A52 and A54.

S24 denotes the surface of the longitudinal tab 24 which is then bearing against the bottom 442 of the proximal cavity. The surface S24 covers the entire surface of the longitudinal leg 24 on the side of the lateral face 29. The surface S24 is an overlapping face of the strand 4. We denote S26 the surface of the transition zone 26 which is then in contact against the plate 48. The surface S26 is a covering face of the strand 4 which is formed by a part of the transverse face 29, located at the level of the transition zone 26, which surrounds the elongated housing 32.

We are then in the configuration of figure 4 , 6 and 8 .

We note S2 the union of surfaces S24 and S26. Such a meeting of surfaces S2 is identified by a hatched zone, on the figure 2 , at each end of the link 2. This meeting of surfaces S2 constitutes an overall face covering the strand 4, made on the link 2.

Following the introduction of a lug 24 into the proximal cavity 44 of a strand 4, the link 2 bears on the bottom 442 and on the plate 48, more precisely on the surface S442 and on the surface S48.

Preferably, during manufacture of the heddle, each strand 4 is arranged in such a way that the surfaces S442 and S48 are horizontal and oriented upwards.

The link 2 and the end portion 42 of the strand 4 partially overlap along the axis Z1 at the level of an IR overlap interface which is the contact interface between the link 2 and the strand 4 along the axis Z1. The IR overlap interface is a geometric surface, defined on the link 2 and on the strand 4, at the level of which these parts are in surface contact. The global covering face S2 bears against the global covering face S4 and these global covering faces S2 and S4 define together the IR covering interface of parts 2 and 4. In other words, the IR covering interface is formed, on strand 4, of the union S4 of surfaces S442 and S48 and, on link 2, of the union S2 of the surfaces S24 and S26.

In particular, link 2 overlaps plate 48 at a single IR overlap interface. In other words, at the level of the plate 48 along the longitudinal axis X1, the outer peripheral surface 56 of the strand 4, opposite to the surface S48 and which includes the surface S66, is not covered along the axis Z1 by the link 2, while the transverse face 28 of link 2 is not covered, along axis Z1, by strand 4.

The surfaces S44 and S66 are respectively inclined towards the IR overlap interface and towards the distal longitudinal end 46, with the angles of inclination α and β.

A first transverse side CT1 of the assembly formed of parts 2 and 4 is defined as being the side of this assembly located, with respect to the overlapping interface IR, in a first direction along the axis Z1. The first transverse side CT1 includes in particular link 2 and the elongated housing 32. A second transverse side CT2 of this assembly is also defined, opposite along the axis Z1 to the first transverse side CT1 with respect to the overlapping interface IR. The second transverse side CT2 includes, in particular, the plate 48 and the peripheral edge 484.

In the assembled configuration of the smooth 1, the distal housing 62 is facing each other, in a direction parallel to the axis Z1, with the lobe 322 of the elongated housing 32. Similarly, the proximal housing 64 is in vis-à-vis, in a direction parallel to the axis Z1, with the lobe 324 of the elongated housing 32. The intermediate rear abutment surfaces 327 of the elongated housing 32 are arranged, along the axis X1, between the orifices 62 and 64. In particular, as seen at figure 4 , the solid part of the transition zone 26 does not cover the orifices 62 and 64 which open completely, along the axis Z1, respectively into the lobe 322 and into the lobe 324 of the elongated housing 32.

The distal orifice 62 and the lobe 322 of the elongated housing 32 are each provided to receive resin in fluid form during the manufacture of the heddle 1. The volumes 62 and 32 therefore each constitute a housing for receiving resin and, together, a pair of housings 32+62 in which is received, as emerges from the explanations which follow, a quantity of resin which solidifies during the manufacture of the heddle, forming a first member 82 for assembling the link 2 and of the strand 4. In the same way, a quantity of resin is received, during manufacture of the heddle 1, both in the proximal orifice 64 and in the lobe 324 of the elongated housing 32 which each constitute a resin receiving housing and, together, a pair of 32+64 housings in which is received a quantity of resin which solidifies during manufacture, forming a second member 84 for assembling the link 2 and the strand 4.

The elongated housing 32 is therefore a housing common to the two pairs of housings 32+62, 32+64 formed respectively by the housings 32 and 62, on the one hand, and 32 and 64, on the other hand. The assembly member 82 is therefore one piece with the assembly member 84. A first flange 86, common to the assembly members 82 and 84, is formed at least in part in this common housing, during the solidification of resin.

Within the meaning of the present invention, a housing of a pair of housings for receiving solidified resin 32, 62 or 64 has at least two surfaces oriented opposite to each other in the longitudinal direction of the axis X1 and which are in contact with the solidified resin, in order to participate in the longitudinal connection between the link 2 and the strand 4. In the orifices 62 and 64, the opposite surfaces are two surfaces in the form of half-cylinders. In the lobe 322, the proximal front abutment surface 323 and two of the intermediate front abutment surfaces 329 located in the first lobe constitute first surfaces, while the two intermediate rear abutment surfaces 327 constitute second surfaces opposite the first surfaces. In the lobe 324, the two intermediate front abutment surfaces 329 made in this lobe constitute first surfaces, while the distal rear abutment surface 325 constitutes a second surface opposite the first surfaces. Thus, in elongated housing 32, surfaces 323 and 329 constitute first surfaces, while surfaces 325 and 327 constitute second surfaces.

We note L1 the maximum distance, measured parallel to the axis X4, between the edges of the two housings 62 and 64, that is to say the distance between the most distal point of the edge of the orifice 62 and the point the most proximal of the edge of the orifice 64. We note L2 the maximum distance measured between the edge of the proximal orifice 64 and the distal longitudinal end 46 of the terminal portion 42, that is to say the distance between the most proximal point of the edge of the orifice 64 and this end 46. The length L2 is greater than the length L1.

The length L32 of the elongated housing 32 is chosen to be strictly greater than the lengths L1 and L2. Thus, in the assembled configuration of the heddle, the housing 32 straddles the housings 62 and 64 and the proximal front abutment surface 323 extends beyond the peripheral edge 484 and the distal longitudinal end 46 of the side. 4, with respect to the surface S48 and outside the vis-à-vis, along the axis Z1, with the solid part of the strand 4 and with the orifices 62 and 64. In other words, the housing 32 is in vis-à-vis along the axis Z1 of a portion of the outer peripheral edge 484 of the plate 48, plus particularly of a portion 4842 of the peripheral edge located on either side, along the axis Y1, of the distal longitudinal end 46 and which is visible through the lobe 322 at the figure 4 . The housing 32 is also opposite, along the axis Z1, a zone Z0 which is adjacent, in a direction perpendicular to the axis Z1, to the peripheral edge 484 and which is empty as long as the resin is n has not been affixed to the assembly area between parts 2 and 4.

Along axis Z1, edge 484 overlaps surface S26, in that it extends opposite this surface. In practice, the trace of the peripheral edge 484 in projection along the axis Z1 on the surface 29 delimits the surface S26.

There is thus formed, at the front of the longitudinal end 46, that is to say beyond this end relative to the plate 48, a passage zone ZP, plane, the section of which is delimited by the contour portion 323 of the proximal part of the lobe 322 and by the portion 4842 of the peripheral edge 484 of the plate 48. As long as the resin has not been affixed to the assembly zone between the parts 2 and 4, this zone of ZP passage is empty, that is to say that it is crossed neither by the solid part of the link 2, nor by the solid part of the strand 4. This ZP passage zone allows a flow of the resin not yet solidified between the interior of the elongated housing 32 and the peripheral edge 484, in particular at the level of the portion 4842 of the peripheral edge 484 which delimits the passage zone ZP.

The passage zone ZP is arranged outside the vis-à-vis along the axis Z1 with the overlapping interface IR since the passage zone ZP extends beyond the peripheral edge 484 with respect to the interface of IR overlay. The passage zone is also located outside the vis-à-vis along the axis Z1 with the solid part of the strand 4. In particular, the passage zone ZP is not arranged vis-à-vis the housings 62 and 64 of strand 4, in a direction parallel to transverse axis Z1.

Given the inclination of the surfaces S44 and S66 in the direction of the overlapping interface IR, the surfaces S44 and S66 are also inclined towards the passage zone ZP.

During the manufacture of the heddle 1, after the tab 24 has been introduced into the proximal cavity 44 as explained above, a quantity of resin is applied at the level of an application point PA which is defined on the surface S44, in the thickness of the ceiling 444. As the surface S44 is inclined towards the passage zone ZP and towards the side face 28, and considering that the surfaces S442 and S48 are oriented upwards at this stage of manufacture, the resin flows by gravity, from the inclined surface S44, towards the elongated housing 32 and towards the side face 28 of the link 2. In particular, the resin penetrates into the elongated housing 32 and, like this elongated housing is arranged opposite the distal housing 62, at the level of the lobe 322, and the proximal housing 64, at the level of the lobe 324, the resin then spreads, under the effect of gravity, in the cylindrical housings 62 and 64, as well as in the counterbore 66. A quantity of resin which has not yet solidified then fills the pairs of housings 32+62 and 32+64.

Furthermore, as the lobe 322 of the elongated housing 32 extends beyond the distal longitudinal end 46 and the portion 4842 of the edge 484 of the strand 4, and still under the effect of gravity, the resin crosses the passage zone ZP, around the distal part of the plate 48 until reaching the previously empty zone Z0, and extending against the portion 4842 of the peripheral edge 484 and the side face 29 of the link 2.

The quantity of fluid resin applied at point PA is chosen so that, on the first transverse side CT1 of the assembly formed by parts 2 and 4, the fluid resin extends beyond the elongated passage 32, up to the notch 30 arranged on the side face 28 of the link 2. This notch, which is arranged on the same longitudinal side with respect to the passage zone ZP and to the housings of the pairs of housings, at the level of an assembly zone of the link 2 with the strand 4, constitutes a zone stopping the progression of the fluid resin along the axis X1, on the side face 28, in the direction of the eyelet 22.

On the second transverse side CT2, the quantity of resin which has passed through the passage zone ZP and the quantity of resin which has arrived in the counterbore 66 through the orifices 62 and 64 meet and together encapsulate the peripheral edge 484 of the plate 48 .

Thus, the solidified resin extends from the inclined surface S44 to the inclined surface S66.

The resin present on the transverse side CT2 also extends as far as the notch 30 made on the side face 29, which also constitutes a zone stopping the progression of the fluid resin along the axis X1, on the side face 29, in the direction of the eyelet 22. On the transverse side CT2, the resin present at the level of the longitudinal and distal end 46 tends to flow in the direction of the counterbore 66, because the bottom surface S66 of this counterbore is inclined in the direction of the longitudinal and distal end 46 and of the passage zone ZP.

On the other hand, the resin also extends into the proximal cavity 44, between the longitudinal leg 24 and the ceiling 444 and between the longitudinal leg 24 and the side walls 446, while the longitudinal leg 24 is in surface support on the bottom 442 of the proximal cavity 44 at the level of the IR covering interface, more precisely at the level of the surface S442. The fluid resin progresses in the proximal cavity 44, around the longitudinal tab 24, to the longitudinal end of the proximal cavity, at the level of the end wall 449, that is to say beyond the free longitudinal end 242 of the longitudinal leg 24. The fluid resin then penetrates into the two holes 52 and 54 which serve as a vent for the evacuation of the air, present in the proximal cavity 44 before the introduction of the fluid resin and which is expelled by the fluid resin. These holes 52 and 54 allow the flow of fluid resin respectively towards the counterbores 58 and 60.

Thus distributed, the resin extends longitudinally, on each transverse face of the heddle, that is to say each face generally perpendicular to the transverse axis Z1, from a transverse face 28 or 29 of the link, at the level of a notch 30, up to an inclined surface S44 or S66 formed on the strand 4. More precisely, and as shown in figure 5 , on the first transverse side CT1 of the heddle, the resin extends continuously from the notch 30 to the inclined surface S44, at the junction between the proximal cavity 44 and the plate 48. On the other hand, as depicted in figure 7 , on the second transverse side CT2, the resin extends from the notch 30 to the bottom surface S66 of the proximal end of the counterbore 66. On the figure 5 and 7 , for the clarity of the drawing, the amount of solidified resin is shown in gray and semi-transparent, to allow viewing certain parts of the stringer located under the external surface of this amount of resin.

After the quantity of metered fluid resin has spread in and around the housings 32, 44, 52, 54, 62, 64 and 66 as explained above, the resin is subjected to an ultraviolet treatment which causes it to polymerize and solidify. , so as to create two assembly members 82 and 84 of solidified resin, in the form of rivets, in the two pairs of housings 32+62 and 32+64, and two pins 72 and 74 of solidified resin, in the holes 52 and 54.

At the end of this treatment, the quantity of resin deposited on the assembly zone between parts 2 and 4 forms the first flange 86 common to the two assembly members 82 and 84, on the first transverse side CT1, and a second flange 88 common to these two assembly members, on the second transverse side CT2. The first common flange 86 is formed inside the elongated housing 32, above the surface S44 and above the side face 28 in the representation of the figure 9 ; it joins the assembly members 82 and 84 respectively formed in the pairs of housings 32+62 and 32+64, on the first transverse side CT1. On the other hand, the second common flange 88 is formed in the counterbore 66 and on the side face 29 and joins the same assembly members, on the second transverse side CT2. In particular, the two aforementioned flanges 86 and 88 extend beyond the longitudinal and distal end 46 of the strand 4 with respect to the surface S48. On the first transverse side CT1 of the heald 1, the resin extends continuously inside the elongated housing 32, as well as around this housing up to the notch 30 provided on the side face 28. On the second transverse side CT2 of the heddle 1, the resin covers a portion of the free edge of the strand 4 formed by the peripheral edge 484 of the plate 48 and extends in the whole of the counterbore 66, as well as up to the notch 30 provided on the side face 29.

After solidification of the resin, the pins 72 and 74 of solidified resin formed in the holes 52 and 54 are of frustoconical shapes and diverge towards the counterbores 58 and 60. In addition, they meet inside the proximal cavity 44 and are integral with the two assembly members 82 and 84. They are thus firmly anchored in the holes 52 and 54 and are not at risk of escaping therefrom. The axial offset d4 favors the anchoring of the pins 72 and 74 in the proximal cavity 44.

Furthermore, a part of the solidified resin extends continuously from the elongated housing 32, through the passage zone ZP, into the previously empty zone Z0. This part of the solidified resin surrounds the longitudinal end portion of the strand 4 which is located, along the axis X1, between the distal orifice 62 and the distal and longitudinal end 46, and which adjoins the peripheral edge 484 of tray 48.

Note 4844 the portion of the peripheral edge 484 which, in the mounted configuration of the rail, is opposite, along the axis Z1, the end portion 26 of the link 2, more precisely the covering surface S26. The trace of the portion 4844, in projection along the axis Z1, on the link 2 delimits the surface S26. This portion 4844 is not opposite, along the axis Z1, the housing 32. As visible in figure 7 , the solidified resin which passes through the passage zone ZP extends in contact with a part of the portion 4844 of the peripheral edge 484. In other words, once solidified, the resin overflows laterally and longitudinally from the zone Z0.

In a variant not shown, the solidified resin surrounds the portion of the peripheral edge 484 of the plate 48 which is located, along the axis X1, between the proximal orifice 64 and the distal and longitudinal end 46, so that the entire peripheral edge portion 484 overlapping the junction zone 26 and facing the housing 32 is encapsulated by the resin.

The bodies of the assembly members 82 and 84, that is to say the volumes of solidified resin contained in the cylindrical housings 62 and 64 and in the elongated housing 32 form obstacles to relative movement between the link and the strand. , in a longitudinal direction parallel to the axis X1 and in a lateral direction parallel to the axis Y1.

In particular, the solidified resin which is in contact with the surfaces 323 and 329 in the first lobe 322 and with the surfaces 329 in the second lobe 324, opposes a withdrawal of the longitudinal tab 24 relative to the proximal cavity 24 along the axis X1. The solidified resin which is in contact with the surfaces 327 in the first lobe 322 and with the surface 325 in the second lobe 324 also opposes a rapprochement of the link 2 and of the strand 4 along the axis X1. The solidified resin which is in contact with the surfaces 329, 327, 323, 325 therefore opposes a relative movement of the link and of the strand, along the axis Y1. Thus, the assembly members 82 and 84, formed in the pairs of housings, secure the link 2 and the strand 4 in the directions of the axes X1 and Y1. These assembly members also join the link 2 and the strand 4 along the transverse axis Z1, because of the cooperation of the flanges 86 and 88 respectively formed on the transverse sides CT1 and CT2 with the link 2 and the strand 4 along the Z1 axis. These soles also contribute to securing the link 2 and the strand 4 in the directions parallel to the axes X1 and Y1.

A part of the solidified resin extends through the passage zone ZP, being one piece with the assembly members 82 and 84 and with their soles 86 and 88. This part of solidified resin forms a block 90 of synthetic material, which isolates the peripheral edge 484 of the plate 48 from the neighboring warp threads when the heald 1 is mounted within the loom M. Similarly, the quantity of solidified resin present on the first transverse side CT1 is thick enough to constitute another block 91 of synthetic material which covers the mouth of the proximal cavity 44 and isolates the edge portion 25 which overlaps the plate 48. Under these conditions, the total quantity of solidified resin distributed around the assembly zone between the parts 2 and 4 makes it possible to soften the external shape of the heddle 1, by encapsulating the protruding edges, and limits the risks of damaging adjacent warp threads, during use of the heddle 1 within the me tier M. This quantity of solidified resin is in one piece and extends over the two transverse sides CT1 and CT2 of the IR covering interface, in particular through the passage zone ZP.

In the second embodiment of the invention shown in figures 10 to 13 , elements similar to those of the first embodiment bear the same references and are not described in detail. The heddle 1 of this embodiment is also intended to be used in the harness H of the loom M of the figure 14 . In what follows, we mainly describe what distinguishes this embodiment from the previous one.

In this embodiment, the ends of the link 2 have no longitudinal tabs. A distal circular orifice 32 and a proximal circular orifice 34, passing right through the link between the transverse face 28 and the transverse face 29, are provided in two end portions 26 of the link 2 which extend, by relative to the eyelet 22, beyond two notches 30 similar to those of the first embodiment.

Each of the orifices 32 and 34 crosses the link 2 right through in directions parallel to the axis Z2, between its transverse faces 28 and 29 respectively visible to the figure 10 and 11 .

Note 38 an outer peripheral edge of the end portion 26 and 39 the longitudinal and distal end of the link 2, this end being located on the axis X2 and formed by the intersection of the edge 38 and the axis X2 .

On the other hand, a plate 48 of the end portion 42 of the strand 4 is provided with three orifices which cross it from side to side, in directions parallel to the axis Z4, namely a circular and distal orifice 62, an orifice circular and proximal 64 and an intermediate orifice 68, arranged along the axis X4, between the orifices 62 and 64. The orifice 68 is open V-shaped, with its branches 682 and 684 which diverge while moving away of the longitudinal and distal end 46 of the strand 4. The orifices 62, 64 and 68 have a closed contour.

At each longitudinal end of the link 2, on the strand 4, is formed an IR covering interface by the surface S48 of the plate 48, defined as in the first embodiment, the plate 48 extending to the orifice 64. This IR overlapping interface is also formed, on the link 2, by the surface S26 of the end portion 26 which receives in support the terminal portion 42 of the strand 4, more particularly the plate 48. The surface S48 forms a face covering link 2 with strand 4. Surface S26 forms a face covering strand 4 with link 2. The trace of the IR covering interface is visible at figure 12 . The IR overlay interface is defined around holes 32 and 34 on link 2 and around holes 62 and 68 on strand 4. Holes 62, 64 and 68 each extend between surface S48 of the IR overlap and the outer peripheral surface 56 of strand 4.

In the example of figures 10 to 13 , the IR recovery interface is parallel to the X1 and Y1 axes and its trace in the plane of the figure 12 is a succession of horizontal line segments.

As seen at figure 10 , in the assembled configuration of the heddle 1, the orifice 64 extends beyond the peripheral edge 38, in particular beyond its longitudinal and distal end 39, with respect to the covering surface S26. In particular, a portion 642 of the outline of the orifice 64 is defined outside the vis-à-vis, along the axis Z1, with the solid part of the transition zone 26 of the link 2. In particular, the orifice 64 is opposite along the axis Z1 a portion of the peripheral edge 38 consisting of the longitudinal and distal end 39. In other words, on a plane perpendicular to the axis Z1, the projection of the outline of the orifice 64 is tangent with the projection of an outline of the peripheral edge 38. The orifice 64 is not a housing of a pair of housings within the meaning of the invention. The contour portion 642 is arranged outside the vis-à-vis along the axis Z1 with the orifices 32 and 34 of the link 2.

In a variant not shown, the orifice 64 extends only partially, relative to the covering surface of the link 2, beyond the peripheral edge of the link 2.

In a variant not shown, the entire contour 64 is outside of the vis-à-vis with the solid part of the link 2 along the transverse axis.

Peripheral edge 38 overlaps along axis Z1 with surface S48 of plate 48 facing link 2.

On the other hand, in this same mounted configuration of the rail 1 and as visible in figure 11 , the free ends of branches 682 and 684 of orifice 68 extend beyond peripheral edge 38, with respect to surface S26, away from axis X1.

The contour of the orifice 68 is denoted 685. The rounded end portions of the contours of the branches 682 and 684 are denoted 686. These contour portions 686 form part of the contour 685 and are not opposite each other, according to the axis Z1, with the solid part of the transition zone 26 of the link 2, nor with the orifices 32 and 34.

There are thus formed three passage zones, respectively denoted ZP1, ZP2 and ZP3, between the orifices 64 and 68 and a volume defined at the periphery of the end portion 26 of the link 2, around its peripheral edge 38. More precisely , a first passage zone ZP1 is delimited by the contour portion 642 and the longitudinal and distal end 39 which belongs to the edge 38, facing the orifice 64 along the axis Z4. This first passage zone ZP1 can be qualified as a “central” passage zone because it is located overall on the axis X1. On the other hand, two lateral passage zones ZP2 and ZP3 are defined on either side of the axis X1, beyond the edge 38 with respect to the orifice 32 and to the surface S26, facing the ends free from the branches 682 and 684 of the intermediate orifice 68. These second passage zones are each delimited by the contour portions 686 of the branches 682 and 684 and by a portion 382 of the edge 38 visible through the branches 682 and 684 at the figure 11 .

Thus, in this case, there is provided, not one but three passage zones ZP1, ZP2 and ZP3 which each extend outside an IR overlap interface defined between the strand 4 and the link 2. More precisely the three passage zones ZP1, ZP2, ZP3 are each outside the vis-à-vis, along the Z1 axis, with the IR overlap interface, outside the vis-à-vis, along the Z1 axis, with a solid part of the link 2 and outside the vis-à-vis, along the axis Z1, of the housings 34 and 32.

As long as the resin has not been applied to the assembly zone between parts 2 and 4, these passage zones ZP1, ZP2 and ZP3 are empty, i.e. they are not crossed by either the solid part of link 2, nor by the solid part of strand 4.

When the smooth is manufactured, the orifices 34 and 62 are arranged facing each other in a direction parallel to the axis Z1 and together form a pair of housings 34+62 in which a first assembly member 82 can be formed. , by solidification of a resin, this first assembly member being, in this example also, in the form of a rivet. In the same way, a second assembly member 84, also in the form of a rivet in this example, is formed in the pair of housings 32+68 consisting of orifices 32 and 68 aligned in a direction parallel to the axis Z1.

A surface S44 provided on the strand 4 is inclined in the direction of the axis X1, of the overlapping interface IR and of the longitudinal and distal end 46, as in the first embodiment. This surface S44 is also inclined in the direction of the passage zones ZP1, ZP2 and ZP3. A point of application PA of the fluid resin is provided on this inclined surface S44. The fluid resin applied to this surface then flows in the direction of the orifices 32 and 34, as well as in front of the peripheral edge 38, that is to say beyond the edge 38 with respect to the solid part of the portion of end 26. It then flows through the orifices 62, 64 and 68 to constitute, after solidification as in the first embodiment, on the one hand, the assembly members 82 and 84 and, on the other hand , blocks of solidified resin extend through the passage zones ZP1, ZP2 and ZP3. One of these blocks of solidified resin, obtained by flowing the resin through the central passage ZP1, is visible at figure 12 with the reference 90. Two other blocks of solidified resin, obtained by flowing the resin through the side passages ZP2 and ZP3, are visible on the figure 13 with references 92 and 94.

The block 90 of solidified resin extends transversely on either side of the plane containing the axes X1 and Y1, on the two transverse sides CT1 and CT2 of the assembly zone between the link 2 and the strand 4, so that it isolates this assembly zone from the outside of the heddle, encapsulating the protruding reliefs, such as the part of the edge 38 located in the vicinity of the longitudinal and distal end 39 of the link 4. Similarly, the blocks 92 and 94 isolate the side portions of edge 38, located on either side of end portion 26 along axis Y1 and located transversely overlapping plate 48.

Blocks 90, 92 and 94 of solidified resin are one-piece with assembly members 82 and 84 and with resin flanges 86 and 88 formed respectively on the first transverse side CT1 and on the second transverse side CT2, as in the first embodiment. Here, the first transverse side CT1 is located, with respect to the IR overlap interface, on the side of the plate 48 of the strand 4 and the orifices 62, 64 and 68, while the second transverse side CT2 is located, with respect to this surface, on the link 2 side and its peripheral edge 38.

The flow of the resin before solidification is limited by the rectilinear notches 30 provided on the two side faces 28 and 29 of the link 2, as well as by a notch 31 provided on the outer peripheral surface 56 of the strand 4, on the side visible to the figure 11 , that is to say on the side of the strand 4 opposite to the inclined surface S44. The notch 31 extends in a plane perpendicular to the axis Z1. This notch 31 is V-shaped open in the direction of the longitudinal and distal end 46 of the strand 4. It can be made by molding during the manufacture of the strand 4 or by subsequent machining. It stops at a distance from the side edges of the strand 4. Advantageously, the ratio of the length of the notch 31 measured parallel to the axis Y4 to the width of the strand at the level of this notch 31 is between 0.6 and 0.95, preferably equal to 0.8. In addition, provision can be made for this notch 31 to have the same thickness, along the axis Z1, as the notches 30 or a similar thickness.

Thus, the quantity of solidified resin present on either side of the overlapping parts of the link 2 and of the strand 4 extends, along the axis X1, between one of the notches 30 and the surface S44 on the side of rail 1 visible at figure 10 and between notches 30 and 31 on the opposite side of the stringer, visible at figure 12 . This quantity of solidified resin comes into contact with and isolates the protruding parts, including the portions 382 and 39 of the edge 38 of the end portion 26 and the edge 484 of the plate 48 in transverse overlap of the link 2, which therefore do not risk damaging neighboring threads when heddle 1 is used in loom M.

Note 384 the portion of the peripheral edge 38 which, in the mounted configuration of the heald, is opposite, along the axis Z1, the end portion 42 of the link 4, more precisely the covering surface S48. The trace of portion 384, in projection along axis Z1, delimits surface S48 on link 2. This portion 384 is not opposite, along axis Z1, housings 32, 64 and 68. As can be inferred from the figure 11 , once solidified, the resin which passes through the passage zones ZP, ZP2 and ZP3 extends in contact with a part of the portion 384 of the peripheral edge 38. In other words, once solidified, the resin overflows laterally and longitudinally volumes situated, along the edge 38, opposite along the axis Z1 of the passage zones ZP1, ZP2 and ZP3.

Note that, in the first embodiment, the housing 32 passes through, along the transverse axis Z1, between the covering face S26 provided on the link 2, which locally defines the IR covering interface, and the external surface 28 which is also provided on the link 2, whereas, in the second embodiment, the housings 62 and 68 pass through, along the transverse axis Z1, between the covering face S48 provided on the strand 4, which locally defines the IR recovery interface, and the external fax 56 also arranged on strand 4.

Whatever the embodiment, each passage zone ZP, ZP1, ZP2 or ZP3 is delimited, in a first part, among the link 2 and the strand 4, by a portion of a closed contour delimiting an orifice passing through this first part. part, along the transverse axis and, in the second part, by a portion of a peripheral edge of this second part. In the first embodiment, the first part is the link 2 in which the elongated housing 32 is a through hole and has a closed contour formed by the surfaces 323 to 329, the surface 323 of which is not opposite each other, along the axis Z1, of the solid part formed of the plate 48 nor opposite, along the axis Z1, of the housings 62 and 64 of the strand 4. In addition, the second part is the strand 4 and the zone ZP passage is formed at the portion 4842 of the peripheral edge 484. In the second embodiment, the first part is the strand 4 in which the through holes 64 and 68 each have a closed contour including a portion 642, respectively 686 , is not vis-a-vis along the axis Z1 of the solid part formed by the end portion 26 nor vis-à-vis along the axis Z1 of the housings 32 and 34 of the link 2, while by defining zones ZP1, ZP2 and ZP3. In addition, the second part is the link 2 and the passage zones ZP1, ZP2 and ZP3 are respectively formed at the level of the portions 39 and 382 of the peripheral edge 38.

In all cases, the passage zone ZP, ZP1, ZP2 or ZP3 is shifted from the overlapping interface IR in the directions of the axes X1 and Y1.

On the other hand, in the two embodiments, a housing of the pair of housings which is through and the peripheral edge mentioned above are respectively arranged on two opposite transverse sides CT1 and CT2 of the IR covering interface.

In both embodiments, the passage zone is traversed by the solidified resin over its entire extent, that is to say over its entire section. However, this is not mandatory.

In both embodiments, it is possible to identify one or more passage zone(s) ZP, ZP1, ZP2 and/or ZP3 which is or are coplanar with the covering interface. However, this is not mandatory.

In both embodiments, the overlay interface is contained in a single plane. However, this is not mandatory. The recovery interface can be tiered. The overlap faces defined on the link 2, respectively on the strand 4, are then non-coplanar.

In both embodiments, at least one of the passage zones ZP or ZP1 is aligned, along the longitudinal axis X1 of the heddle 1, with at least one housing of the pair of housings 32+62, 32+64 or 34+ 62 and 32+68 in which is formed an assembly member 82 or 84, preferably a housing of the part, the peripheral edge of which delimits the passage zone.

In a variant not shown, at least one of the blocks 90, 92, 94 of resin forms a part separate from the assembly members 82 and 84. Resin is then deposited at several points on the first transverse side CT1. In this case, preferably, the resin which forms the blocks 90, 92, 94 is of identical composition to the resin which forms the assembly members 82 and 84. This is however not obligatory.

In a variant not shown, only the pairs of housings are filled with resin without forming a sole.

When the elongated housing 32 has a keyhole geometry, as mentioned above, the intermediate abutment surfaces 327 and 329 improve the connection by the fasteners formed by the fasteners 82 and 84 in the longitudinal direction. . According to a variant of the invention, not shown, an elongated housing in the form of a "keyhole", such as the elongated housing 32 of the first embodiment, may comprise several pairs of intermediate front abutment surfaces, offset along the axis longitudinal X1 of the beam.

Alternatively, a single assembly member 82 and 84 is provided. According to another variant, three or more such members are provided.

According to yet another variant of the invention, not shown, the link can be sandwiched into the strand, being caught between two surfaces in a transverse direction parallel to the axis Z1. In this case, the transverse overlapping of parts 2 and 4 takes place on two overlapping surfaces of the link. The above observations regarding the IR surface are then applicable to at least one of these two covering surfaces.

According to another variant of the invention, the heddle body 10 comprises only a single strand 4.

Whatever the embodiment, the quantity of solidified resin which constitutes the assembly members 82 and 84 is advantageously applied from a single transverse side CT1 or CT2 of the heddle being manufactured, on the side of the first part and is distributed at the level of the peripheral edge of the second part, on the opposite transverse side CT2 or CT1, crossing the passage zone(s) ZP or ZP1, ZP2 and ZP3. This quantity of material covers the transition zones between the link and the strand and limits the risks of snagging with neighboring warp threads during weaving, without interfering with the filling of the pairs of housings in which the assembly 82 and 84, after solidification of the resin.

The inclined surfaces S44, S66 provided on one or on each of the parts 2 and 4 allow the spreading of the resin, even if the resin is deposited only at one point PA, which allows standardization and automation. of the manufacturing process for the rail 1.

Preferably, in all the embodiments, the passage zone, or at least one passage zone, has a section greater than or equivalent to the minimum section of the housings of the pairs of housings taken in a plane perpendicular to the transverse axis.

At least one passage zone, namely the passage zone ZP in the first embodiment and the passage zones ZP2 or ZP3 in the second embodiment, is formed in a through hole 32 or 68 which also belongs to a pair of housings in which an assembly member 82 or 84 is formed. Thus, the resin deposited in or close to this pair of housings is guided towards this passage zone ZP, ZP2 or ZP3. This avoids the accumulation of excess resin in certain areas of the rail.

The passage zone ZP or ZP1, which is delimited by the distal longitudinal end 46 or 39 of the second part 4 or 2, allows a compact connection in a lateral direction.

In the case where a common sole 86, 88 or equivalent is formed for the assembly members 82 and 84, on at least one transverse side of the heddle, this sole forms a protective covering of the transverse external faces of the strand and of the link. As this sole is continuous in the longitudinal and lateral directions and as it covers certain portions of the peripheral edges of these parts, it forms an external surface of progressive transition between the link and the strand, which also limits the risks of a neighboring warp thread on the strand or the link.

Whatever the embodiment, the peripheral edge 484 or 38 which delimits the passage zone is external and distinct from a housing of the pair or pairs of housings.

Whatever the embodiment, all the housings of the pairs of housings have a closed contour.

Whatever the embodiment, the notches 30 and 31 limit the progression of the resin in the direction of the eyelet 22 or in the direction of the attachment means 11A and 11B. As they are provided at a distance from the edges and side edges of the parts 2 and 4, they do not weaken the mechanical strength of the part 2 or 4 in which they are made, nor the surface condition of these ridges or side edges against which the neighboring warp threads may rub during weaving.

Alternatively, a treatment other than ultraviolet can be used to solidify the resin.

For example, the resin used is of the epoxy or acrylic type.

The invention is shown in the figures in the case where it is used with a heddle 1 for a harness H of loom M of the Jacquard type. However, it is applicable to a smooth frame whose two hooking means allow it to be connected to a crosspiece of a smooth frame. In this case, the loom is not a Jacquard-type loom but a loom equipped with a dobby or a cam mechanism.

The embodiments and variants contemplated above may be combined to generate other embodiments within the scope of the independent claims.

Claims (15)

1. A heald (1) for guiding a warp yarn for a loom (M), the heald extending lengthwise along a longitudinal axis (X1) and comprising:

   - an eye (2), with an eyelet (22) for passage of the warp yarn;

   - a heald body (10), with at least one strand (4) with extends along the longitudinal axis; and

   - at least one assembly member (82, 84) between the eye and the strand, this assembly member being made from solidified resin and positioned in a pair of housings (32+62, 32+64; 34+62, 32+68) formed by a housing (32; 32, 34) arranged in the eye and a housing (62, 64; 62, 68) arranged in the strand;

   the housings of the pair of housings facing one another along a direction which is parallel to an axis (Z1) that is transverse to the longitudinal axis;

   the housings of the pair of housings being positioned on either side of an overlap interface (IR), at which the eye and the strand overlap along the transverse axis (Z1);

   one housing (32; 62, 68) of the pair of housings (32+62, 32+64; 34+62, 32+68) passing all the way through, along the transverse axis, the strand or the eye in which this housing is arranged, and being positioned on a first transverse side (CT1) relative to the overlap interface (IR),

   a first part (2; 4) from the eye and the strand being provided with at least one orifice (32; 64, 68), with a closed contour (323+325+327+329; 642, 685), passing all the way through the first part, along the transverse axis (Z1),

   characterized in that

   - at least one section (323; 642, 686) of the closed contour (323+325+327+329; 642, 685) is defined outside the facing part, along the transverse axis (Z1), with a solid portion (48; 26) of the second part among the eye and the strand and outside the facing part, also along the transverse axis, with a housing (62, 64; 32, 34) of the second part which belongs to a pair of housings.

   - a passage zone (ZP; ZP1, ZP2, ZP3) is delimited

   - by the section (323; 642, 686) of the contour (323+325+327+329; 642, 685) of the through orifice (32; 64, 68) of the first part (2; 4); and

   - by a section (4842; 39, 382) of a peripheral edge (484; 38) of the second part, which is positioned, relative to the overlap interface, on a second transverse side (CT2);

   - the passage zone is passed through by solidified resin (90; 90, 92, 94) which extends against the section of the peripheral edge delimiting the passage zone.
2. The heald according to claim 1, characterized in that the through housing (32, 324; 68) of the pair of housings also forms the through orifice of the first part (2; 4) which delimits the passage zone (ZP; ZP2, ZP3).
3. The heald according to claim 2, characterized in that the through housing (32) is shared by two pairs of housings (32+62, 32+64).
4. The heald according to one of claims 2 or 3, characterized in that the through housing (32) is delimited by at least a proximal front stop surface (323), a distal rear stop surface (325), an intermediate rear stop surface (327) and an intermediate front stop surface (329).
5. The heald according to one of the preceding claims, characterized in that, on the first part (2; 4), the through orifice (32; 64, 68) faces, along the transverse axis (Z1), the section (4842; 39, 382) of the peripheral edge (484, 38) of the second part (4; 2) delimiting the passage zone (ZP; ZP1, ZP2, ZP3).
6. The heald according to claim 5, characterized in that the through orifice (32; 64, 68) of the first part (2; 4) faces, along the transverse axis (Z1), a distal longitudinal end (46; 39) of the second part (4; 2).
7. The heald according to one of the preceding claims, characterized in that the solidified resin which passes through the passage zone (ZP; ZP1, ZP2, ZP3) extends from an outer surface (S44, S66; S44, 56) of the first part (2; 4) and up to a transverse outer surface (28, 29) of the second part (4; 2), these outer surfaces being positioned on a same transverse side (CT1, CT2) relative to the overlap interface (IR).
8. The heald according to claim 7, characterized in that at least one of these outer surfaces (S44, S66) is inclined (α, β) relative to the longitudinal axis (X1) toward the passage zone (ZP; ZP1, ZP2, ZP3).
9. The heald according to one of the preceding claims, characterized in that the solidified resin that passes through the passage zone (ZP, ZP1, ZP2, ZP3) extends in contact with another section (4844; 384) of the peripheral edge (484; 38) of the second part (4; 2), which faces, along the transverse axis (Z1), a solid portion (26; 48) of the first part (2; 4).
10. The heald according to one of the preceding claims, characterized in that the solidified resin (90; 90, 92, 94) which passes through the passage zone (ZP, ZP1, ZP2, ZP3) is monobloc with the assembly member (82, 84).
11. The heald according to one of the preceding claims, characterized in that at least one outer surface (28, 29, 56) of the eye (2) and/or of the strand (4) which is in contact with the resin includes a notch (30, 31) for limiting the diffusion of the resin.
12. The heald according to one of the preceding claims, characterized in that a longitudinal end portion (48) of the second part (4) is devoid of side walls, in that the first part overlaps, along the transverse axis (Z1), the longitudinal end (48) at a single overlap interface (IR) and in that the through housing (32) of the pair of housings is arranged in the first part (2), among the eye and the strand.
13. The heald according to one of the preceding claims, characterized in that the first part is the eye (2) and the second part is the strand (4).
14. The heald according to one of the preceding claims, characterized in that a longitudinal tab (24) of the eye (2) is received in a proximal cavity (44) of the strand (4) defined between a bottom (442), a ceiling (444) and two side walls (446), in that two holes (52, 54) are arranged in the strand and each open into the proximal cavity and on an outer surface (56) of the strand and in that a free end (242) of the longitudinal tab is offset, along the longitudinal axis (X1), relative to the two holes, while being closer to the mouth of the proximal cavity than the two holes.
15. A harness (H) of a Jacquard-type loom (M), equipped with several guide healds for a warp yarn, characterized in that at least one of the healds (1) is according to one of the preceding claims.

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