EP2253749B1 - Device for forming a shed and Jacquard loom equipped with such a device - Google Patents

Device for forming a shed and Jacquard loom equipped with such a device Download PDF

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Publication number
EP2253749B1
EP2253749B1 EP10163070A EP10163070A EP2253749B1 EP 2253749 B1 EP2253749 B1 EP 2253749B1 EP 10163070 A EP10163070 A EP 10163070A EP 10163070 A EP10163070 A EP 10163070A EP 2253749 B1 EP2253749 B1 EP 2253749B1
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EP
European Patent Office
Prior art keywords
axis
axes
knives
previous
levers
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EP10163070A
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German (de)
French (fr)
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EP2253749A1 (en
Inventor
Damien Bouchet
Patrice Przytarski
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Staeubli Lyon SA
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Staeubli Lyon SA
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Publication of EP2253749A1 publication Critical patent/EP2253749A1/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/24—Features common to jacquards of different types
    • D03C3/32—Jacquard driving mechanisms
    • D03C3/36—Griffe operating mechanisms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C13/00—Shedding mechanisms not otherwise provided for
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C13/00—Shedding mechanisms not otherwise provided for
    • D03C13/02—Shedding mechanisms not otherwise provided for with independent drive motors
    • D03C13/025—Shedding mechanisms not otherwise provided for with independent drive motors with independent frame drives
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/24—Features common to jacquards of different types
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/24—Features common to jacquards of different types
    • D03C3/26—General arrangements of jacquards, or disposition in relation to loom

Definitions

  • the invention relates to a shedding device on a Jacquard weaving loom as well as to a Jacquard weaving loom equipped with such a device.
  • the invention relates more particularly to the vertical actuation, in opposition of phases, of two series of blades or knives which, in a Jacquard type loom, ensure the vertical displacement of hooks belonging to a weave mechanism.
  • hooks arranged in rows are alternately raised by these blades or knives which are commonly referred to as "claws", these claws being themselves supported by one of two claw frames.
  • Each frame of claws must be animated with a movement of vertical oscillations in opposition of phase with the other frame.
  • FR-A-2,669,650 it is known to FR-A-2,669,650 to use an input shaft driven by a continuous rotational movement and on which are mounted four eccentric each associated with a control rod of a rocking lever.
  • the claw frames are suspended by rods, respectively short and long, with two rocking levers on each side of the knife sets. Given the drive kinematics of claw frames, they have an oblique reciprocating motion and each of them must be guided linearly. Linear guidance of frames is not described in FR-A-2,669,650 . It is generally carried out by a roller secured to a frame of claws and engaged in a slide, which requires significant lubrication leading to laborious maintenance and likely to cause splashes of lubricant above the weaving area.
  • the invention intends to remedy more particularly by proposing a new device for forming the shed in which a claw frame is efficiently guided in its back-and-forth movement, without having recourse to a system requiring lubrication and without significantly increasing the size of the guide kinematics of the frame.
  • the invention effective vertical guidance of a claw frame is obtained.
  • the first axis at which the connecting rod is articulated on the claw frame can follow a vertical path, with a lateral displacement parasite very weak, of the order of 0.1 mm for a vertical displacement of about 100 mm.
  • the invention also relates to a jacquard loom equipped with a shedding device as previously described. Such a craft is easier to use and maintain than those of the state of the art.
  • the loom M partially shown in the figures is equipped with a shedding device 10 which comprises two sets of knives or blades.
  • a first set of knives 12 is supported by two crosspieces 14 and 16 which are interconnected by spacers not shown and thus form a first claw frame for the knives 12.
  • a second set of knives 22 is supported by two cross members 24 and 26 which form a second frame of claws.
  • the sleepers 14 and 16 are respectively disposed above the crosspieces 24 and 26, at the ends of the knives 12 and 22.
  • the knives 12 extend generally in the lower part of the crosspieces 14 and 16, while the knives 22 extend globally. in the upper part of the cross members 24 and 26, so that the knives 12 and 22 can cross.
  • the knives 12 and 22 are rigidly mounted on the cross-members 14, 16, 24 and 26. In particular, there is no connecting rod between the knives 12 and 22 and the cross-members 14, 16, 24 and 22.
  • the knives 12 and 22 are intended to be displaced with a vertical oscillations movement represented by the double arrow F 1 , this making it possible to move unrepresented hooks between their top dead center positions and their respective bottom dead positions, so that to control the movement of rails 30 each connected to a hook by an arch 32. Only three rails 30 are shown in FIG. figure 1 , for the sake of clarity.
  • C 1 denotes the upper claw frame which comprises the elements 12 to 16 and C 2 the lower claw frame which comprises the elements 22 to 26.
  • the smooth frames C 1 and C 2 are arranged between two frames 40 and 42 which are fixed and secured to a beam 44 of the trade M.
  • a spacer 46 connects the frames 40 and 42, being specified here that a second spacer can be arranged between the frames 40 and 42, to stiffen the support structure, the side right of the figure 1 .
  • An auxiliary frame 48 is supported by the beam 44 on the side of the device 10 visible to the figure 1 .
  • Another auxiliary frame may be mounted near the frame 42, on its side opposite the knives.
  • the Y axis is perpendicular to the X axis and horizontal, while the Z axis is vertical.
  • the knives 12 and 22 have their respective longitudinal axes parallel to the axis X.
  • a shaft 50 is connected by means not shown to the main shaft of the loom and its longitudinal axis X 50 is parallel to the axis X.
  • This shaft 50 has a continuous rotational movement when the loom M works. It passes through two eccentrics 62 and 64 around which are mounted two control rods, namely an external control rod 72 and an inner control rod 74.
  • the control rod 74 is described as “inner” in that it is more close to the frame 42 that the connecting rod 72 which is described as “external”.
  • the connecting rod 72 drives an outer T-lever 82 pivotally mounted relative to the frame 40 about an axis X 80 parallel to the X axis 50 and determined by the frames 40 and 48.
  • An inner T-lever 84 is articulated on the connecting rod 74, about the X axis 80 .
  • the outer T-lever 82 is connected to the cross-member 14 of the frame C 1 by a rod 102 and to the cross-member 24 of the frame C 2 by a rod 104.
  • the inner T-lever 84 is connected to the cross member 14 by a rod 112 and the crossbar 24 by a rod 114.
  • the rods 102 and 112 have the same length which is strictly greater than the length of the rods 104 and 114.
  • the rods 102, 104, 112 and 114 allow the drive frames C 1 and C 2 and are, as such, sometimes referred to as "connecting rods".
  • the elements 62, 64, 72, 74, 82, 84, 102, 104, 112 and 114 make it possible to transmit the continuous rotational movement of the shaft 50 to the cross-members 14 and 24 in order to drive them into the generally vertical movement F 1 of the frames C 1 and C 2 .
  • a similar drive mechanism is provided on the side of the frame 42, this mechanism is not shown in the figures for clarity of the drawing, because it is optional.
  • the crosspiece 14 comprises a main body 142 and a lug 144 fixed on an outer face of this body opposite to the knives 12.
  • the crosspiece 16 comprises a main body 162 and a tab 164 fixed on the outer face of this body which is not visible in the figures.
  • the crossbar 24 also comprises a main body 242 and a tab 244, while a similar structure is adopted for the crossbar 26.
  • a connecting rod 202 is articulated on the tab 144 of this cross member about an axis X 1 parallel to the axis X.
  • the axis X 1 passes in a median portion of the cross member 14, that is to say mid-distance between the knives 12A and 12C located near the ends 146 and 148 of this cross.
  • the connecting rod 202 is articulated, respectively about two axes X 2 and X 3 parallel to the axis X 1 , on two levers 204 and 206.
  • the axis X 1 is located between the axes X 2 and X 3 and equidistant from those -this.
  • the lever 204 is articulated about an axis X 4 parallel to the axis X 1 on a support 422 fixed on the frame 42, while the lever 206 is articulated about an axis X 5 parallel to the axis X 1 on a support 424 also fixed to the frame 42.
  • the central connecting rod 202 and the two levers 204 together form a structure articulated on fixed parts 422 and 424 of the device 10, this structure for guiding the vertical displacement, parallel to the axis Z, a point P 1 of the cross 14 through which passes the X axis 1 .
  • the trajectory of the point P 1 is imposed by the guide system formed of the elements 202, 204 and 206.
  • ⁇ 1 is a vertical line passing through the point P 1 , that is to say parallel to the Z axis, perpendicular to the axis X 1 and secant with this axis.
  • the X 4 and X 5 axes are respectively disposed on either side of the line ⁇ 1 .
  • the arm 204 has a rotational movement R 4 about the axis X 4
  • the arm 206 has a rotational movement R 6 about the axis X 5
  • the figure 5 shows three positions, namely, in solid lines, an intermediate position corresponding to the intersection of the knives, also visible at figures 1 and 2 , the low position of the figure 3 in phantom and the high position of the figure 4 with dots. It is noted that, between the positions respectively represented in phantom and dotted lines, the point P 1 and the axis X 1 follow a substantially vertical trajectory without significant lateral displacement.
  • the axis X 2 follows a trajectory in an arc centered on the axis X 4 , that is to say whose concavity is oriented to the right at the figure 5
  • the X axis 3 follows a trajectory in an arc centered on the axis X 5 and whose concavity is oriented towards the left in this same figure.
  • the end of the upper guide arm 204 which defines the axis X 2 tends to move to the right at the figure 5
  • the end of the lower guide arm 206 which defines the axis X 3 tends to move to the left in this figure.
  • the frame C 1 is in the low position.
  • Compensation for the lateral displacements of the axes X 2 and X 3 is optimized when the active length L 204 of the lever 204, that is to say the distance between the axes X 2 and X 4 is equal to the active length L 206 of lever 206, that is to say at the distance between the axes X 3 and X 5 .
  • the geometry of the elements 202, 204 and 206 and the positioning of the axes X 1 to X 5 are determined so that, in the crossing configuration of the claw frames C 1 and C 2 shown in FIGS. figures 1 and 2 , that is to say when the upper edges of the knives 12 and 22 are in the same plane, the levers 204 and 206 are horizontal, while the central rod 102 is vertical.
  • the levers 204 and 206 may not be strictly horizontal, but substantially horizontal, forming with an horizontal plane an angle less than 10 °.
  • the connecting rod 202 may not be rigorously vertical but substantially vertical forming with a vertical plane an angle of less than 10 °.
  • the direction of a lever or the connecting rod is given by a straight line connecting its end hinge pins.
  • the lateral displacement of the axis X 1 is of the order of 0.1 mm on a vertical stroke of the cross member 14 equal to 100 mm.
  • the ratio of the lateral movement on the vertical movement of the frame C 1 is 1/1000, which can be considered insignificant and does not interfere with the operation of the knives 12 and 22.
  • the axis X 1 is included in a plane ⁇ which passes through the top of the edges of the knives 12.
  • the frame C 1 is equipped with a guiding device formed of a central connecting rod and two levers, as explained above, at the level of FIG. each of its longitudinal ends, that is to say at each of the cross members 12 and 14.
  • a guidance system is also provided for the lower claw frame and comprises a connecting rod 222 hinged to the lug 244 of the crossmember 24 about an axis X ' 1 parallel to the axis X.
  • the connecting rod 222 is hinged at the of its respective ends and around two axes X ' 2 and X' 3 parallel to the axis X ' 1 , on two levers 224 and 226.
  • the lever 222 is articulated about an axis X ' 4 parallel to the axis X' 1 on the support 424, while the lever 226 is articulated about an axis X ' 5 parallel to the axis X ' 1 on the support 422.
  • the axis X ' 1 passes in a median part of the crossbar 24, halfway between the knives 22A and 22B located near its ends 246 and 248.
  • the connecting rods 202 and 222 are identical, as are the levers 204, 206, 224 and 226, which is advantageous in terms of manufacture.
  • the active lengths of the levers 224 and 226 are therefore identical and the axis X ' 1 is equidistant from the axes X' 2 and X ' 3 .
  • the axis X ' 1 is located between the axes X' 2 and X ' 3 .
  • ⁇ ' 1 a vertical line intersecting with the axis X' 1 .
  • the axes X ' 4 and X' 5 are located on both sides of the line ⁇ ' 1 .
  • the levers 224 and 226 are respectively above and below a horizontal plane P ' H containing the axis X' 1 , in all the positions of the guide device 222-226.
  • this second guiding device which is obtained by symmetry around a vertical line ⁇ 1 or ⁇ ' 1 from the guiding device of the upper claw frame C 1 , the operation of the guide device of the lower claw frame is deduced from the figure 5 by a symmetry around the line ⁇ 1 .
  • the X ' 1 axis follows a trajectory that can be considered vertical, with a good degree of approximation.
  • a second guiding mechanism which is not shown, is provided at the cross member 26.
  • the second guide devices provided in the vicinity of the cross members 16 and 26 are optional.
  • the axis X ' 1 is provided coplanar with a plane ⁇ ' which contains the upper edges of the knives 22.
  • the axes X 1 and X ' 1 coincide in knife crossing configuration, which also minimizes the relative lateral displacement of the knives during their respective movements.
  • the upper levers 204 and 224 for guiding the upper and lower claw frames C 1 and C 2 are arranged on either side central rods 202 and 222 and straight lines ⁇ 1 and ⁇ ' 1 , as well as the lower levers 206 and 226.
  • the levers 204 and 224 are arranged on either side of the straight lines ⁇ 1 and ⁇ ' 1 , as well as the levers 206 and 226, that the axes X 4 and X' 4 and that the axes X 5 and X ' 5 . This gives a great compactness to the device of the invention.
  • the levers 204, 206, 224 and 226 are provided with openings 208 and 228 allowing the passage of some of the rods 102, 104, 112 and 114.
  • the guiding system of the frames C 1 and C 2 which comprises the elements 202 to 226, is independent of the drive means of these frames in their back-and-forth movement, these drive means comprising the elements 62, 64, 72, 74, 82, 84, 102, 104, 112 and 114 and similar elements provided on the frame 42 side.
  • the drive kinematics comprises two control rods, two T-levers and four rods or connecting rods to the frame.
  • the claw frame guidance system is not dependent on the exact type of drive kinematics used in the craft.
  • the joints of the upper levers 204 and 224, the lower levers 206 and 226 and the rods 202 and 222 can be made by means of sealed bearings without maintenance.
  • the guiding device generates no pollution.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

The device has a series of knives operated by an upper knife box (C1) and a lower knife box, and equipped with a guiding system. The system has a connecting rod (202) articulated around a first axis. The system is independent from knife box driving rods, and comprises levers (204, 206) respectively articulated on a connecting rod around second and third axes. The levers are articulated on supports of the device around fourth and fifth axes, respectively. The fourth and fifth axes are located on both sides of a vertical straight line secant with the first axis, where the axes are parallel.

Description

L'invention a trait à un dispositif de formation de la foule sur un métier à tisser de type Jacquard ainsi qu'à un métier à tisser de type Jacquard équipé d'un tel dispositif.The invention relates to a shedding device on a Jacquard weaving loom as well as to a Jacquard weaving loom equipped with such a device.

L'invention concerne plus particulièrement l'actionnement vertical, en opposition de phases, de deux séries de lames ou couteaux qui, dans un métier de type Jacquard, assurent le déplacement vertical de crochets appartenant à une mécanique d'armure. Dans ce type de métier, des crochets disposés en rangées sont alternativement soulevés par ces lames ou couteaux qui sont communément dénommés « griffes », ces griffes étant elles-mêmes supportées par l'un de deux cadres de griffes. Chaque cadre de griffes doit être animé d'un mouvement d'oscillations verticales en opposition de phase avec l'autre cadre.The invention relates more particularly to the vertical actuation, in opposition of phases, of two series of blades or knives which, in a Jacquard type loom, ensure the vertical displacement of hooks belonging to a weave mechanism. In this type of trade, hooks arranged in rows are alternately raised by these blades or knives which are commonly referred to as "claws", these claws being themselves supported by one of two claw frames. Each frame of claws must be animated with a movement of vertical oscillations in opposition of phase with the other frame.

Pour ce faire, il est connu de FR-A-2 669 650 d'utiliser un arbre d'entrée animé d'un mouvement de rotation continu et sur lequel sont montés quatre excentriques associés chacun à une bielle de commande d'un levier basculant. Les cadres de griffes sont suspendus par des bielles, respectivement courtes et longues, à deux leviers basculants, de chaque côté des ensembles de couteaux. Compte tenu de la cinématique d'entraînement des cadres de griffes, ceux-ci ont un mouvement alternatif oblique et chacun d'entre eux doit être guidé linéairement. Le guidage linéaire des cadres n'est pas décrit dans FR-A-2 669 650 . Il est généralement réalisé par un galet solidaire d'un cadre de griffes et engagé dans une coulisse, ce qui nécessite une lubrification importante entraînant un entretien laborieux et susceptible d'occasionner des projections de lubrifiant au-dessus de la zone de tissage.To do this, it is known to FR-A-2,669,650 to use an input shaft driven by a continuous rotational movement and on which are mounted four eccentric each associated with a control rod of a rocking lever. The claw frames are suspended by rods, respectively short and long, with two rocking levers on each side of the knife sets. Given the drive kinematics of claw frames, they have an oblique reciprocating motion and each of them must be guided linearly. Linear guidance of frames is not described in FR-A-2,669,650 . It is generally carried out by a roller secured to a frame of claws and engaged in a slide, which requires significant lubrication leading to laborious maintenance and likely to cause splashes of lubricant above the weaving area.

Il est par ailleurs connu de EP-A-1 167 598 d'utiliser un système de guidage de cadre de lisses dans lequel une première barre est articulée sur un premier point fixe d'une mécanique Jacquard, une deuxième barre est articulée sur un deuxième point fixe de la mécanique et une troisième barre est articulée sur les première et deuxième barres et sur un cadre de griffes au niveau d'un point d'articulation mobile. Le mouvement complexe de cette troisième barre ne peut assurer un mouvement vertical du cadre de griffes que si le point d'articulation mobile entre la troisième barre et le cadre de griffes peut se superposer au premier point fixe. Cette superposition est défavorable en termes d'encombrement, en particulier lorsqu'il est nécessaire de faire cohabiter des systèmes de guidage de deux cadres de griffes superposés.It is also known from EP-A-1,167,598 to use a smooth frame guide system in which a first bar is articulated on a first fixed point of a Jacquard mechanism, a second bar is articulated on a second fixed point of the mechanism and a third bar is articulated on the first and second bars and on a claw frame at a movable hinge point. The complex movement of this third bar can ensure vertical movement of the claw frame only if the point of articulation movable between the third bar and the claw frame can be superimposed on the first fixed point. This superposition is unfavorable in terms of space, especially when it is necessary to coexist guide systems of two frames of claws superimposed.

C'est à ces inconvénients qu'entend plus particulièrement remédier l'invention en proposant un nouveau dispositif de formation de la foule dans lequel un cadre de griffes est efficacement guidé dans son mouvement de va-et-vient, sans avoir recours à un système nécessitant une lubrification et sans augmenter notablement l'encombrement de la cinématique de guidage du cadre.It is these drawbacks that the invention intends to remedy more particularly by proposing a new device for forming the shed in which a claw frame is efficiently guided in its back-and-forth movement, without having recourse to a system requiring lubrication and without significantly increasing the size of the guide kinematics of the frame.

A cet effet, l'invention concerne un dispositif de formation de la foule sur un métier à tisser de type Jacquard dans lequel l'actionnement vertical alternatif de deux séries de couteaux est opéré par deux cadres de griffes entraînés chacun selon un mouvement de va-et-vient par aux moins deux tiges respectivement articulées sur un levier basculant lui-même entraîné par un arbre, au moins un de ces cadres de griffes étant équipé d'un système de guidage de son mouvement de va-et-vient qui comprend une bielle articulée sur ce cadre autour d'un premier axe. Ce dispositif est caractérisé

  • en ce que le système de guidage est indépendant des tiges d'entraînement des cadres et comprend, en outre, un premier levier et un deuxième levier articulés respectivement sur la bielle autour d'un deuxième axe et d'un troisième axe situés de part et d'autre du premier axe
  • en ce que le premier levier est articulé, autour d'un quatrième axe, sur une partie fixe du dispositif et le deuxième levier est articulé, autour d'un cinquième axe, sur une partie fixe du dispositif
  • en ce que les quatrième et cinquième axes sont situés de part et d'autre d'une droite verticale sécante avec le premier axe et
  • en ce que les premier, deuxième, troisième, quatrième et cinquième axes sont parallèles.
To this end, the invention relates to a shedding device on a jacquard loom in which the vertical reciprocating actuation of two sets of knives is operated by two claw frames each driven in a variable movement. and-comes by at least two rods respectively articulated on a rocker lever itself driven by a shaft, at least one of these claw frames being equipped with a system for guiding its reciprocating movement which comprises a connecting rod articulated on this frame around a first axis. This device is characterized
  • in that the guiding system is independent of the frame drive rods and further comprises a first lever and a second lever respectively articulated on the connecting rod about a second axis and a third axis located on the side and else of the first axis
  • in that the first lever is hinged about a fourth axis on a fixed part of the device and the second lever is hinged about a fifth axis on a fixed part of the device
  • in that the fourth and fifth axes are located on either side of a vertical line intersecting with the first axis and
  • in that the first, second, third, fourth and fifth axes are parallel.

Grâce à l'invention, on obtient un guidage vertical efficace d'un cadre de griffes. En particulier, le premier axe au niveau duquel la bielle est articulée sur le cadre de griffes peut suivre une trajectoire verticale, avec un déplacement latéral parasite très faible, de l'ordre de 0,1 mm pour un déplacement vertical de 100 mm environ.Thanks to the invention, effective vertical guidance of a claw frame is obtained. In particular, the first axis at which the connecting rod is articulated on the claw frame can follow a vertical path, with a lateral displacement parasite very weak, of the order of 0.1 mm for a vertical displacement of about 100 mm.

Selon des aspects avantageux mais non obligatoires de l'invention, un tel dispositif peut incorporer une ou plusieurs des caractéristiques suivantes :

  • La distance entre les deuxième et quatrième axes est égale à la distance entre les troisième et cinquième axes.
  • Le premier axe est équidistant des deuxième et troisième axes.
  • En configuration de croisement des cadres de griffes, les premier et deuxième leviers sont horizontaux ou sensiblement horizontaux.
  • En configuration de croisement des cadres de griffes, la bielle est verticale ou sensiblement verticale.
  • Le premier axe est inclus dans un plan passant par le sommet des couteaux portés par le cadre des griffes.
  • Le cadre de griffes est équipé d'un système de guidage à chacune de ses deux extrémités longitudinales.
  • Le premier levier s'étend au-dessus d'un plan horizontal comprenant le premier axe, alors que le deuxième levier s'étend au-dessous de ce plan.
  • Deux systèmes de guidage équipant chacun un cadre de griffes différent sont disposés sur un même côté du dispositif, alors que les premiers axes des deux systèmes de guidage sont confondus lorsque les couteaux portés par les deux cadres de griffes se croisent et alors que les premiers leviers des deux systèmes de guidage sont disposés de part et d'autre d'une droite verticale sécante avec le premier axe d'un des systèmes de guidage.
  • L'un au moins des leviers du système de guidage est percé d'une ouverture de passage d'une telle tige.
  • Le premier axe passe par une partie médiane d'une traverse du cadre de griffes, à mi-distance entre les couteaux situés au voisinage de ses extrémités de cette traverse.
  • Les couteaux sont montés rigidement sur les traverses des cadres de griffes.
According to advantageous but non-mandatory aspects of the invention, such a device may incorporate one or more of the following features:
  • The distance between the second and fourth axes is equal to the distance between the third and fifth axes.
  • The first axis is equidistant from the second and third axes.
  • In the crossing configuration of the claw frames, the first and second levers are horizontal or substantially horizontal.
  • In the crossing configuration of the claw frames, the connecting rod is vertical or substantially vertical.
  • The first axis is included in a plane passing through the top of the knives carried by the frame of the claws.
  • The claw frame is equipped with a guide system at each of its two longitudinal ends.
  • The first lever extends above a horizontal plane including the first axis, while the second lever extends below this plane.
  • Two guiding systems each equipping a different claw frame are disposed on the same side of the device, while the first axes of the two guiding systems are combined when the knives carried by the two claw frames intersect and while the first levers two guide systems are arranged on either side of a vertical line secant with the first axis of one of the guide systems.
  • At least one of the levers of the guide system is pierced with a passage opening of such a rod.
  • The first axis passes through a median portion of a cross of the frame of claws, midway between the knives located near its ends of this cross.
  • The knives are rigidly mounted on the crosses of the claw frames.

L'invention concerne également un métier à tisser de type Jacquard équipé d'un dispositif de formation de la foule tel que précédemment décrit. Un tel métier est plus facile à utiliser et à entretenir que ceux de l'état de la technique.The invention also relates to a jacquard loom equipped with a shedding device as previously described. Such a craft is easier to use and maintain than those of the state of the art.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre d'un mode de réalisation d'un dispositif et d'un métier à tisser conformes à son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue en perspective des parties constitutives essentielles d'un dispositif de formation de la foule conforme à l'invention appartenant à un métier à tisser conforme à l'invention,
  • la figure 2 est une vue en perspective des parties mobiles du dispositif représenté à la figure 1,
  • la figure 3 est une vue d'extrémité du cadre de griffes supérieur et de ses moyens d'entraînement et de guidage situés sur un premier côté de ce cadre de griffes, le cadre de griffes étant en position basse de sa course,
  • la figure 4 est une vue analogue à la figure 3 lorsque le cadre de griffes est en position haute de sa course,
  • la figure 5 est une épure de principe représentant les mouvements du cadre de griffes des figures 3 et 4 et de ses moyens de guidage,
  • la figure 6 est une vue analogue à la figure 3 pour le cadre de griffes inférieur et
  • la figure 7 est une vue analogue à la figure 4 pour le cadre de griffes inférieur.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of an embodiment of a device and a loom according to its principle, given only by way of example and with reference to the appended drawings in which:
  • the figure 1 is a perspective view of the essential constituent parts of a shedding device according to the invention belonging to a loom according to the invention,
  • the figure 2 is a perspective view of the moving parts of the device shown in FIG. figure 1 ,
  • the figure 3 is an end view of the upper claw frame and its drive and guide means located on a first side of this claw frame, the claw frame being in the lower position of its stroke,
  • the figure 4 is a view similar to the figure 3 when the claw frame is in the upper position of its stroke,
  • the figure 5 is a basic sketch representing the movements of the claw frame of the Figures 3 and 4 and its guide means,
  • the figure 6 is a view similar to the figure 3 for the lower claw frame and
  • the figure 7 is a view similar to the figure 4 for the lower claw frame.

Le métier à tisser M représenté partiellement aux figures est équipé d'un dispositif de formation de la foule 10 qui comprend deux séries de couteaux ou de lames. Une première série de couteaux 12 est supportée par deux traverses 14 et 16 qui sont reliées entre elles par des entretoises non représentées et forment ainsi un premier cadre de griffes pour les couteaux 12. Une deuxième série de couteaux 22 est supportée par deux traverses 24 et 26 qui forment un deuxième cadre de griffes. Les traverses 14 et 16 sont respectivement disposées au-dessus des traverses 24 et 26, aux extrémités des couteaux 12 et 22. Les couteaux 12 s'étendent globalement en partie inférieure des traverses 14 et 16, alors que les couteaux 22 s'étendent globalement en partie supérieure des traverses 24 et 26, de sorte que les couteaux 12 et 22 peuvent se croiser. Les couteaux 12 et 22 sont rigidement montés sur les traverses 14, 16, 24 et 26. En particulier, il n'y a pas de biellette de liaison entre les couteaux 12 et 22 et les traverses 14, 16, 24 et 22.The loom M partially shown in the figures is equipped with a shedding device 10 which comprises two sets of knives or blades. A first set of knives 12 is supported by two crosspieces 14 and 16 which are interconnected by spacers not shown and thus form a first claw frame for the knives 12. A second set of knives 22 is supported by two cross members 24 and 26 which form a second frame of claws. The sleepers 14 and 16 are respectively disposed above the crosspieces 24 and 26, at the ends of the knives 12 and 22. The knives 12 extend generally in the lower part of the crosspieces 14 and 16, while the knives 22 extend globally. in the upper part of the cross members 24 and 26, so that the knives 12 and 22 can cross. The knives 12 and 22 are rigidly mounted on the cross-members 14, 16, 24 and 26. In particular, there is no connecting rod between the knives 12 and 22 and the cross-members 14, 16, 24 and 22.

Les couteaux 12 et 22 sont destinés à être déplacés avec un mouvement d'oscillations verticales représenté par la double flèche F1, ceci permettant de déplacer des crochets non représentés entre leurs positions de point mort haut et leurs positions de point mort bas respectives, afin de commander le déplacement de lisses 30 reliés chacune à un crochet par une arcade 32. Seul trois lisses 30 sont représentées à la figure 1, pour la clarté du dessin.The knives 12 and 22 are intended to be displaced with a vertical oscillations movement represented by the double arrow F 1 , this making it possible to move unrepresented hooks between their top dead center positions and their respective bottom dead positions, so that to control the movement of rails 30 each connected to a hook by an arch 32. Only three rails 30 are shown in FIG. figure 1 , for the sake of clarity.

On note C1 le cadre de griffes supérieur qui comprend les éléments 12 à 16 et C2 le cadre de griffes inférieur qui comprend les éléments 22 à 26. Les cadres de lisses C1 et C2 sont disposés entre deux bâtis 40 et 42 qui sont fixes et solidarisés à une poutre 44 du métier M. Une entretoise 46 relie les bâtis 40 et 42, étant précisé ici qu'une deuxième entretoise peut être disposée entre les bâtis 40 et 42, afin de rigidifier la structure de support, du côté droit de la figure 1.C 1 denotes the upper claw frame which comprises the elements 12 to 16 and C 2 the lower claw frame which comprises the elements 22 to 26. The smooth frames C 1 and C 2 are arranged between two frames 40 and 42 which are fixed and secured to a beam 44 of the trade M. A spacer 46 connects the frames 40 and 42, being specified here that a second spacer can be arranged between the frames 40 and 42, to stiffen the support structure, the side right of the figure 1 .

Un bâti auxiliaire 48 est supporté par la poutre 44 sur le côté du dispositif 10 visible à la figure 1. Un autre bâti auxiliaire peut être monté à proximité du bâti 42, sur son côté opposé aux couteaux.An auxiliary frame 48 is supported by the beam 44 on the side of the device 10 visible to the figure 1 . Another auxiliary frame may be mounted near the frame 42, on its side opposite the knives.

On considère un repère orthogonal X Y Z dans lequel l'axe X est parallèle à la direction longitudinale de la poutre 44, l'axe Y est perpendiculaire à l'axe X et horizontal, alors que l'axe Z est vertical.Considering an orthogonal reference X Y Z in which the X axis is parallel to the longitudinal direction of the beam 44, the Y axis is perpendicular to the X axis and horizontal, while the Z axis is vertical.

Les couteaux 12 et 22 ont leurs axes longitudinaux respectifs parallèles à l'axe X.The knives 12 and 22 have their respective longitudinal axes parallel to the axis X.

Un arbre 50 est relié par des moyens non représentés à l'arbre principal du métier et son axe longitudinal X50 est parallèle à l'axe X. Cet arbre 50 a un mouvement de rotation continue lorsque le métier M fonctionne. Il traverse deux excentriques 62 et 64 autour desquels sont montées deux bielles de commande, à savoir une bielle de commande extérieure 72 et une bielle de commande intérieure 74. La bielle de commande 74 est qualifiée de « intérieure » dans la mesure où elle est plus proche du bâti 42 que la bielle 72 qui est qualifiée de « extérieure ». La bielle 72 attaque un levier en T extérieur 82 monté pivotant par rapport au bâti 40 autour d'un axe X80 parallèle à la l'axe X50 et déterminé par les bâtis 40 et 48. Un levier en T intérieur 84 est articulé sur la bielle 74, autour de l'axe X80.A shaft 50 is connected by means not shown to the main shaft of the loom and its longitudinal axis X 50 is parallel to the axis X. This shaft 50 has a continuous rotational movement when the loom M works. It passes through two eccentrics 62 and 64 around which are mounted two control rods, namely an external control rod 72 and an inner control rod 74. The control rod 74 is described as "inner" in that it is more close to the frame 42 that the connecting rod 72 which is described as "external". The connecting rod 72 drives an outer T-lever 82 pivotally mounted relative to the frame 40 about an axis X 80 parallel to the X axis 50 and determined by the frames 40 and 48. An inner T-lever 84 is articulated on the connecting rod 74, about the X axis 80 .

Le levier en T extérieur 82 est relié à la traverse 14 du cadre C1 par une tige 102 et à la traverse 24 du cadre C2 par une tige 104. De la même manière, le levier en T intérieur 84 est relié à la traverse 14 par une tige 112 et à la traverse 24 par une tige 114. Les tiges 102 et 112 ont la même longueur qui est strictement supérieure à la longueur des tiges 104 et 114. Les tiges 102, 104, 112 et 114 permettent l'entraînement des cadres C1 et C2 et sont, à ce titre, parfois qualifiés de « bielles au cadre ».The outer T-lever 82 is connected to the cross-member 14 of the frame C 1 by a rod 102 and to the cross-member 24 of the frame C 2 by a rod 104. In the same way, the inner T-lever 84 is connected to the cross member 14 by a rod 112 and the crossbar 24 by a rod 114. The rods 102 and 112 have the same length which is strictly greater than the length of the rods 104 and 114. The rods 102, 104, 112 and 114 allow the drive frames C 1 and C 2 and are, as such, sometimes referred to as "connecting rods".

Ainsi, les éléments 62, 64, 72, 74, 82, 84, 102, 104, 112 et 114 permettent de transmettre le mouvement de rotation continue de l'arbre 50 aux traverses 14 et 24 afin d'entraîner celles-ci dans le mouvement de va-et-vient F1 globalement vertical des cadres C1 et C2.Thus, the elements 62, 64, 72, 74, 82, 84, 102, 104, 112 and 114 make it possible to transmit the continuous rotational movement of the shaft 50 to the cross-members 14 and 24 in order to drive them into the generally vertical movement F 1 of the frames C 1 and C 2 .

Un mécanisme d'entraînement analogue est prévu du côté du bâti 42, ce mécanisme n'étant pas représenté sur les figures pour la clarté du dessin, car il est optionnel.A similar drive mechanism is provided on the side of the frame 42, this mechanism is not shown in the figures for clarity of the drawing, because it is optional.

La traverse 14 comprend un corps principal 142 et une patte 144 fixée sur une face externe de ce corps opposée aux couteaux 12. De même, la traverse 16 comprend un corps principal 162 et une patte 164 fixée sur la face externe de ce corps qui n'est pas visible sur les figures. La traverse 24 comprend également un corps principal 242 et une patte 244, alors qu'une structure analogue est adoptée pour la traverse 26.The crosspiece 14 comprises a main body 142 and a lug 144 fixed on an outer face of this body opposite to the knives 12. Similarly, the crosspiece 16 comprises a main body 162 and a tab 164 fixed on the outer face of this body which is not visible in the figures. The crossbar 24 also comprises a main body 242 and a tab 244, while a similar structure is adopted for the crossbar 26.

Pour guider verticalement la traverse 14 dans son mouvement de va-et-vient F1, une bielle 202 est articulée sur la patte 144 de cette traverse autour d'un axe X1 parallèle à l'axe X. L'axe X1 passe dans une partie médiane de la traverse 14, c'est-à-dire à mi-distance entre les couteaux 12A et 12C situés au voisinage des extrémités 146 et 148 de cette traverse. La bielle 202 est articulée, respectivement autour de deux axes X2 et X3 parallèles à l'axe X1, sur deux leviers 204 et 206. L'axe X1 est situé entre les axes X2 et X3 et équidistant de ceux-ci. Le levier 204 est articulé autour d'un axe X4 parallèle à l'axe X1 sur un support 422 fixé sur le bâti 42, alors que le levier 206 est articulé autour d'un axe X5 parallèle à l'axe X1 sur un support 424 également fixé sur le bâti 42. La bielle centrale 202 et les deux leviers 204 forment ensemble une structure articulée sur des parties fixes 422 et 424 du dispositif 10, cette structure permettant de guider le déplacement vertical, parallèlement à l'axe Z, d'un point P1 de la traverse 14 par lequel passe l'axe X1. En effet, lorsque le cadre de griffes supérieur C1 se déplace entre les positions basse et haute respectivement représentées aux figures 3 et 4, la trajectoire du point P1 est imposée par le système de guidage formé des éléments 202, 204 et 206.To vertically guide the cross member 14 in its reciprocating movement F 1 , a connecting rod 202 is articulated on the tab 144 of this cross member about an axis X 1 parallel to the axis X. The axis X 1 passes in a median portion of the cross member 14, that is to say mid-distance between the knives 12A and 12C located near the ends 146 and 148 of this cross. The connecting rod 202 is articulated, respectively about two axes X 2 and X 3 parallel to the axis X 1 , on two levers 204 and 206. The axis X 1 is located between the axes X 2 and X 3 and equidistant from those -this. The lever 204 is articulated about an axis X 4 parallel to the axis X 1 on a support 422 fixed on the frame 42, while the lever 206 is articulated about an axis X 5 parallel to the axis X 1 on a support 424 also fixed to the frame 42. The central connecting rod 202 and the two levers 204 together form a structure articulated on fixed parts 422 and 424 of the device 10, this structure for guiding the vertical displacement, parallel to the axis Z, a point P 1 of the cross 14 through which passes the X axis 1 . Indeed, when the upper claw frame C 1 moves between the low and high positions respectively represented at Figures 3 and 4 , the trajectory of the point P 1 is imposed by the guide system formed of the elements 202, 204 and 206.

On note Δ1 une droite verticale passant par le point P1, c'est-à-dire parallèle à l'axe Z, perpendiculaire à l'axe X1 et sécante avec cet axe. Les axes X4 et X5 sont disposés respectivement de part et d'autre de la droite Δ1.Δ 1 is a vertical line passing through the point P 1 , that is to say parallel to the Z axis, perpendicular to the axis X 1 and secant with this axis. The X 4 and X 5 axes are respectively disposed on either side of the line Δ 1 .

Comme il ressort plus particulièrement de la figure 5, au cours des mouvements de la traverse 14 entre les positions représentées respectivement aux figures 3 et 4, le bras 204 a un mouvement de rotation R4 autour de l'axe X4, alors que le bras 206 a un mouvement de rotation R6 autour de l'axe X5. La figure 5 montre trois positions, à savoir, en traits pleins, une position intermédiaire correspondant au croisement des couteaux, par ailleurs visible aux figures 1 et 2, la position basse de la figure 3 en traits mixtes et la position haute de la figure 4 en pointillés. On note que, entre les positions représentées respectivement en traits mixtes et en pointillés, le point P1 et l'axe X1 suivent une trajectoire essentiellement verticale sans déplacement latéral notable.As is clear from the figure 5 , during the movements of the cross-member 14 between the positions represented respectively at Figures 3 and 4 , the arm 204 has a rotational movement R 4 about the axis X 4 , while the arm 206 has a rotational movement R 6 about the axis X 5 . The figure 5 shows three positions, namely, in solid lines, an intermediate position corresponding to the intersection of the knives, also visible at figures 1 and 2 , the low position of the figure 3 in phantom and the high position of the figure 4 with dots. It is noted that, between the positions respectively represented in phantom and dotted lines, the point P 1 and the axis X 1 follow a substantially vertical trajectory without significant lateral displacement.

Ceci provient du fait que l'axe X2 suit une trajectoire en arc de cercle centrée sur l'axe X4, c'est-à-dire dont la concavité est orientée vers la droite à la figure 5, alors que l'axe X3 suit une trajectoire en arc de cercle centrée sur l'axe X5 et dont la concavité est orientée vers la gauche sur cette même figure. Ainsi, lorsque le cadre de griffes est en position haute, l'extrémité du bras de guidage supérieur 204 qui définit l'axe X2 tend à se déplacer vers la droite à la figure 5, alors que l'extrémité du bras de guidage inférieur 206 qui définit l'axe X3 tend à se déplacer vers la gauche sur cette figure. De même en est-il lorsque le cadre C1 est en position basse. On obtient donc un effet de compensation de la déviation des axes X2 et X3 au niveau du point P1, de sorte que ce point et l'axe X1 suivent une trajectoire qui peut être considérée comme verticale, avec un bon degré d'approximation.This is because the axis X 2 follows a trajectory in an arc centered on the axis X 4 , that is to say whose concavity is oriented to the right at the figure 5 , while the X axis 3 follows a trajectory in an arc centered on the axis X 5 and whose concavity is oriented towards the left in this same figure. Thus, when the claw frame is in the up position, the end of the upper guide arm 204 which defines the axis X 2 tends to move to the right at the figure 5 , while the end of the lower guide arm 206 which defines the axis X 3 tends to move to the left in this figure. The same is true when the frame C 1 is in the low position. We thus obtain a compensation effect of the deviation of the axes X 2 and X 3 at the point P 1 , so that this point and the axis X 1 follow a trajectory that can be considered as vertical, with a good degree of 'approximation.

La compensation des déplacements latéraux des axes X2 et X3 est optimisée lorsque la longueur active L204 du levier 204, c'est-à-dire la distance entre les axes X2 et X4 est égale à la longueur active L206 du levier 206, c'est-à-dire à la distance entre les axes X3 et X5. Par ailleurs, la géométrie des éléments 202, 204 et 206 et le positionnement des axes X1 à X5 sont déterminés de telle sorte que, en configuration de croisement des cadres de griffes C1 et C2 représentée aux figures 1 et 2, c'est-à-dire lorsque les arêtes supérieures des couteaux 12 et 22 sont dans un même plan, les leviers 204 et 206 sont horizontaux, alors que la bielle centrale 102 est verticale.Compensation for the lateral displacements of the axes X 2 and X 3 is optimized when the active length L 204 of the lever 204, that is to say the distance between the axes X 2 and X 4 is equal to the active length L 206 of lever 206, that is to say at the distance between the axes X 3 and X 5 . Moreover, the geometry of the elements 202, 204 and 206 and the positioning of the axes X 1 to X 5 are determined so that, in the crossing configuration of the claw frames C 1 and C 2 shown in FIGS. figures 1 and 2 , that is to say when the upper edges of the knives 12 and 22 are in the same plane, the levers 204 and 206 are horizontal, while the central rod 102 is vertical.

En pratique, dans cette position, les leviers 204 et 206 peuvent ne pas être rigoureusement horizontaux, mais sensiblement horizontaux, en formant avec un plan horizontal un angle inférieur à 10°. De même, dans cette position, la bielle 202 peut ne pas être rigoureusement verticale mais sensiblement verticale en formant avec un plan vertical un angle inférieur à 10°.In practice, in this position, the levers 204 and 206 may not be strictly horizontal, but substantially horizontal, forming with an horizontal plane an angle less than 10 °. Similarly, in this position, the connecting rod 202 may not be rigorously vertical but substantially vertical forming with a vertical plane an angle of less than 10 °.

La direction d'un levier ou de la bielle est donnée par une droite reliant ses axes d'articulation d'extrémité.The direction of a lever or the connecting rod is given by a straight line connecting its end hinge pins.

En outre, dans toutes les positions du système de guidage entre les positions basses et hautes représentées aux figures 3 à 5, le levier 204 est au-dessus d'un plan horizontal PH contenant l'axe X1, alors que le levier 206 est au-dessous de ce plan.In addition, in all positions of the guidance system between the low and high positions represented at Figures 3 to 5 the lever 204 is above a horizontal plane P H containing the axis X 1 , while the lever 206 is below this plane.

Dans ces conditions, il s'avère que le déplacement latéral de l'axe X1 est de l'ordre de 0,1 mm sur une course verticale de la traverse 14 égale à 100 mm. En d'autres termes, le rapport du mouvement latéral sur le mouvement vertical du cadre C1 est de 1/1000, ce qui peut être considéré comme peu significatif et ne gène pas le fonctionnement des couteaux 12 et 22.Under these conditions, it turns out that the lateral displacement of the axis X 1 is of the order of 0.1 mm on a vertical stroke of the cross member 14 equal to 100 mm. In other words, the ratio of the lateral movement on the vertical movement of the frame C 1 is 1/1000, which can be considered insignificant and does not interfere with the operation of the knives 12 and 22.

Afin de minimiser l'influence du mouvement latéral de l'axe X1, on prévoit par construction que l'axe X1 est inclus dans un plan Π qui passe par le sommet des arrêtes des couteaux 12.In order to minimize the influence of the lateral movement of the axis X 1 , it is provided by construction that the axis X 1 is included in a plane Π which passes through the top of the edges of the knives 12.

Selon un aspect de l'invention qui n'est pas représenté pour la clarté du dessin, le cadre C1 est équipé d'un dispositif de guidage formé d'une bielle centrale et de deux leviers, comme expliqué ci-dessus, au niveau de chacune de ses extrémités longitudinales, c'est-à-dire au niveau de chacune des traverses 12 et 14.According to one aspect of the invention which is not shown for the sake of clarity of the drawing, the frame C 1 is equipped with a guiding device formed of a central connecting rod and two levers, as explained above, at the level of FIG. each of its longitudinal ends, that is to say at each of the cross members 12 and 14.

Un système de guidage est également prévu pour le cadre de griffes inférieur et comprend une bielle 222 articulée sur la patte 244 de la traverse 24 autour d'un axe X'1 parallèle à l'axe X. La bielle 222 est articulée, au niveau de ses extrémités respectives et autour de deux axes X'2 et X'3 parallèles à l'axe X'1, sur deux leviers 224 et 226. Le levier 222 est articulé autour d'un axe X'4 parallèle à l'axe X'1 sur le support 424, alors que le levier 226 est articulé autour d'un axe X'5 parallèle à l'axe X'1 sur le support 422.A guidance system is also provided for the lower claw frame and comprises a connecting rod 222 hinged to the lug 244 of the crossmember 24 about an axis X ' 1 parallel to the axis X. The connecting rod 222 is hinged at the of its respective ends and around two axes X ' 2 and X' 3 parallel to the axis X ' 1 , on two levers 224 and 226. The lever 222 is articulated about an axis X ' 4 parallel to the axis X' 1 on the support 424, while the lever 226 is articulated about an axis X ' 5 parallel to the axis X ' 1 on the support 422.

L'axe X'1 passe dans une partie médiane de la traverse 24, à mi-distance des couteaux 22A et 22B situés au voisinage de ses extrémités 246 et 248.The axis X ' 1 passes in a median part of the crossbar 24, halfway between the knives 22A and 22B located near its ends 246 and 248.

En pratique, les bielles 202 et 222 sont identiques, de même que les leviers 204, 206, 224 et 226, ce qui est avantageux en termes de fabrication. Les longueurs actives des leviers 224 et 226 sont donc identiques et l'axe X'1 est équidistant des axes X'2 et X'3.In practice, the connecting rods 202 and 222 are identical, as are the levers 204, 206, 224 and 226, which is advantageous in terms of manufacture. The active lengths of the levers 224 and 226 are therefore identical and the axis X ' 1 is equidistant from the axes X' 2 and X ' 3 .

Comme pour le système de guidage du cadre de griffes supérieur C1, l'axe X'1 est situé entre les axes X'2 et X'3.As for the guide system of the upper claw frame C 1 , the axis X ' 1 is located between the axes X' 2 and X ' 3 .

On note Δ'1 une droite verticale sécante avec l'axe X'1. Les axes X'4 et X'5 sont situés de part et d'autre de la droite Δ'1.We denote Δ ' 1 a vertical line intersecting with the axis X' 1 . The axes X ' 4 and X' 5 are located on both sides of the line Δ ' 1 .

Les leviers 224 et 226 sont respectivement au dessus en en dessous d'un plan horizontal P'H contenant l'axe X'1, dans toutes les positions du dispositif de guidage 222-226.The levers 224 and 226 are respectively above and below a horizontal plane P ' H containing the axis X' 1 , in all the positions of the guide device 222-226.

Compte tenu de la construction de ce deuxième dispositif de guidage, qui est obtenu par symétrie autour d'une droite verticale Δ1 ou Δ'1 à partir du dispositif de guidage du cadre de griffes supérieur C1, le fonctionnement du dispositif de guidage du cadre de griffes inférieur se déduit de la figure 5 par une symétrie autour de la droite Δ1. Il en résulte que l'axe X'1 suit une trajectoire qui peut être considérée comme verticale, avec un bon degré d'approximation.Given the construction of this second guiding device, which is obtained by symmetry around a vertical line Δ 1 or Δ ' 1 from the guiding device of the upper claw frame C 1 , the operation of the guide device of the lower claw frame is deduced from the figure 5 by a symmetry around the line Δ 1 . As a result, the X ' 1 axis follows a trajectory that can be considered vertical, with a good degree of approximation.

Comme pour le cadre de griffes supérieur, un second mécanisme de guidage, qui n'est pas représenté, est prévu au niveau de la traverse 26.As for the upper claw frame, a second guiding mechanism, which is not shown, is provided at the cross member 26.

Toutefois, les seconds dispositifs de guidage prévus au voisinage des traverses 16 et 26 sont facultatifs.However, the second guide devices provided in the vicinity of the cross members 16 and 26 are optional.

L'axe X'1 est prévu coplanaire avec un plan Π' qui contient les arêtes supérieures des couteaux 22.The axis X ' 1 is provided coplanar with a plane Π' which contains the upper edges of the knives 22.

En outre, par construction, les axes X1 et X'1 sont confondus en configuration de croisement des couteaux, ce qui minimise également le déplacement latéral relatif des couteaux au cours de leurs mouvements respectifs.In addition, by construction, the axes X 1 and X ' 1 coincide in knife crossing configuration, which also minimizes the relative lateral displacement of the knives during their respective movements.

On remarque que les leviers supérieurs 204 et 224 permettant de guider les cadres de griffes supérieur et inférieur C1 et C2 sont disposés de part et d'autre des bielles centrales 202 et 222 et des droites Δ1 et Δ'1, de même que les leviers inférieurs 206 et 226. En d'autres termes, les leviers 204 et 224 sont disposés de part et d'autre des droites Δ1 et Δ'1, de même que les leviers 206 et 226, que les axes X4 et X'4 et que les axes X5 et X'5. Ceci confère une grande compacité au dispositif de l'invention. Par ailleurs, pour améliorer la compacité du dispositif 10 parallèlement à l'axe X, les leviers 204, 206, 224 et 226 sont pourvus d'ouvertures 208 et 228 permettant le passage de certaines des tiges 102, 104, 112 et 114.Note that the upper levers 204 and 224 for guiding the upper and lower claw frames C 1 and C 2 are arranged on either side central rods 202 and 222 and straight lines Δ 1 and Δ ' 1 , as well as the lower levers 206 and 226. In other words, the levers 204 and 224 are arranged on either side of the straight lines Δ 1 and Δ ' 1 , as well as the levers 206 and 226, that the axes X 4 and X' 4 and that the axes X 5 and X ' 5 . This gives a great compactness to the device of the invention. Moreover, to improve the compactness of the device 10 parallel to the X axis, the levers 204, 206, 224 and 226 are provided with openings 208 and 228 allowing the passage of some of the rods 102, 104, 112 and 114.

On note que, comme un cadre de griffes monte quand l'autre descend, il y a compensation des inerties. Les vibrations dues au déséquilibre éventuel des cinématiques d'entraînement et de guidage sont donc fortement diminuées.We note that, as a frame of claws rises when the other goes down, there is compensation for inertia. The vibrations due to the possible imbalance of the kinematics of drive and guidance are greatly reduced.

Le système de guidage des cadres C1 et C2, qui comprend les éléments 202 à 226, est indépendant des moyens d'entraînement de ces cadres dans leur mouvement de va-et-vient, ces moyens d'entraînement comprenant les éléments 62, 64, 72, 74, 82, 84, 102, 104, 112 et 114 et les éléments analogues prévus du côté du bâti 42.The guiding system of the frames C 1 and C 2 , which comprises the elements 202 to 226, is independent of the drive means of these frames in their back-and-forth movement, these drive means comprising the elements 62, 64, 72, 74, 82, 84, 102, 104, 112 and 114 and similar elements provided on the frame 42 side.

L'invention a été décrite ci-dessus dans le cas où la cinématique d'entraînement comprend deux bielles de commande, deux leviers en T et quatre tiges ou bielles au cadre. Toutefois, le système de guidage des cadres de griffes n'est pas dépendant du type exact de cinématique d'entraînement utilisé dans le métier.The invention has been described above in the case where the drive kinematics comprises two control rods, two T-levers and four rods or connecting rods to the frame. However, the claw frame guidance system is not dependent on the exact type of drive kinematics used in the craft.

Les articulations des leviers supérieurs 204 et 224, des leviers inférieurs 206 et 226 et des bielles 202 et 222 peuvent être réalisées au moyen de roulements étanches sans entretien. Le dispositif de guidage ne génère aucune pollution.The joints of the upper levers 204 and 224, the lower levers 206 and 226 and the rods 202 and 222 can be made by means of sealed bearings without maintenance. The guiding device generates no pollution.

Le fait que les axes X1 et X'1, passent par les parties médianes des traverses 14 et 24 équilibre les défauts d'inclinaison des couteaux 12 et 22 qui sont rigidement liés aux traverses 14, 16, 24 et 26.The fact that the axes X 1 and X ' 1 , passing through the middle portions of the cross members 14 and 24 balance the inclination defects of the knives 12 and 22 which are rigidly connected to the cross members 14, 16, 24 and 26.

Claims (12)

  1. A shed-former device (10) on a loom (M) of the Jacquard type in which the reciprocating vertical actuation of two series of knives (12, 22) is performed by two blade frames (C1, C2) each driven with back-and-forth reciprocating motion (F1) by at least two rods (102, 104, 112, 114) hinged respectively to a rocker lever (82, 84) itself driven by a shaft (50), at least one blade frame being fitted with a system for guiding its reciprocating motion that comprises a rocker lever (202, 222) hinged to said blade frame about a first axis (X1, X'1), the device being characterized:
    • in that the guide system is independent of the drive rods of the frames (C1, C2) and further comprises first and second levers (204, 224; 206, 226) hinged respectively to the rocker lever about second and third axes (X2, X'2; X3, X'3) situated on either side of first axes (X1, X'1);
    • in that the first lever (204, 224) is hinged about a fourth axis (X4, X'4) to a stationary portion (422) of the device (10) and the second lever (206, 226) is hinged about a fifth axis (X5, X'5) to a stationary portion (424) of the device;
    • in that the fourth and fifth axes (X4, X5, X'4, X'5) are situated on either side of a vertical straight line (Δ1, Δ'1) intersecting the first axis; and
    • in that the first, second, third, fourth, and fifth axes (X1-X5, X'1-X'5) are parallel.
  2. A device according to claim 1, characterized in that the distance (L204) between the second and fourth axes (X2, X4, X'2, X'4) is equal to the distance (L206) between the third and fifth axes (X3, X5, X'3, X'5).
  3. A device according to any preceding claim, characterized in that the first axis (X1, X'1) is equidistant between the second and third axes (X2, X3, X'2, X'3).
  4. A device according to one of the previous claims, characterized in that, when the blade frames (C1, C2) are in the crossing configuration, the first and second levers (204, 206, 224, 226) are horizontal or substantially horizontal.
  5. A device according to one of the previous claims, characterized in that, when the blade frames (C1, C2) are in the crossing configuration, the rocker (202, 222) is vertical or substantially vertical.
  6. A device according to one of the previous claims, characterized in that the first axis (X1, X'1) is included in a plane (Π, Π') containing the tops of the knives (12, 22) carried by the blade frames (C1, C2).
  7. A device according to one of the previous claims, characterized in that the blade frame (C1, C2) is fitted with a guide system (202-206, 222-226) at each of its two longitudinal ends (14, 16, 24, 26).
  8. A device according to one of the previous claims, characterized in that two guide systems (202-206, 222-226), each fitted to a different blade frame (C1, C2), are disposed on one side of the device (10), in that the first axes (X1, X'1) of the two guide systems coincide when the blade frames are in the crossing configuration, and in that the first levers of the two guide systems are disposed on either side of a vertical straight line (Δ1, Δ'1) intersecting the first axis of one of the guide systems.
  9. A device according to one of the previous claims, characterized in that at least one of the levers (204, 206, 224, 226) of the guide system is pierced by an opening (208, 228) for passing such a rod.
  10. A device according to one of the previous claims, characterized in that the first axis (X1-X'1) passes through a middle portion of a cross-member (14, 16, 24, 26) of the blade frame (C1, C2) halfway between the knives (12A, 12B, 22A, 22B) located near the ends (146, 148, 246, 248) of said cross-member.
  11. A device according to one of the previous claims, characterized in that the knives (12, 22) are rigidly mounted on the cross-members (14, 16, 24, 26) of the blade frames (C1, C2).
  12. A Jacquard type loom (M) fitted with a shed-former device (10) according to any preceding claim.
EP10163070A 2009-05-19 2010-05-18 Device for forming a shed and Jacquard loom equipped with such a device Active EP2253749B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0953321A FR2945825B1 (en) 2009-05-19 2009-05-19 CROWN FORMATION DEVICE AND JACQUARD - TYPE WEAVING MACHINE EQUIPPED WITH SUCH A DEVICE.

Publications (2)

Publication Number Publication Date
EP2253749A1 EP2253749A1 (en) 2010-11-24
EP2253749B1 true EP2253749B1 (en) 2012-03-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10163070A Active EP2253749B1 (en) 2009-05-19 2010-05-18 Device for forming a shed and Jacquard loom equipped with such a device

Country Status (6)

Country Link
EP (1) EP2253749B1 (en)
KR (1) KR101662180B1 (en)
CN (1) CN101892542B (en)
AT (1) ATE550466T1 (en)
BR (1) BRPI1001484B1 (en)
FR (1) FR2945825B1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102031614A (en) * 2010-12-30 2011-04-27 常熟市常纺纺织机械有限公司 Shedding mechanism for jacquard machine
KR101434043B1 (en) * 2012-11-09 2014-08-26 박용우 Shedding device for jacquard loom
CN103266387B (en) * 2013-04-19 2015-04-22 嵊州市盛通电子科技有限公司 Jacquard opening apparatus
CN104499143B (en) * 2015-01-15 2016-03-30 尹黎明 The griffing of assembly is griffed in a kind of jacquard
CN104480608B (en) * 2015-01-19 2016-02-10 李素凤 Swing mechanism in a kind of jacquard
CN104480607B (en) * 2015-01-19 2016-03-09 尹黎明 The mounting structure of knitting needle in a kind of jacquard
CN104562358B (en) * 2015-01-23 2016-03-09 海宁市天一纺织有限公司 A kind of drive apparatus of jacquard fabric
FR3080118B1 (en) * 2018-04-16 2020-05-01 Staubli Faverges ROTARY RATIERE AND WEAVING
FR3094725B1 (en) * 2019-04-03 2021-05-14 Staubli Lyon Jacquard link and mechanical link comprising such a link
CN114592261B (en) * 2022-03-15 2023-10-27 嵊州市和丰电子科技有限公司 Jacquard with low machine body, low weight and high stability

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1004308A3 (en) * 1989-07-17 1992-10-27 Wiele Michel Van De Nv DRIVE FOR KNIVES GRIDS OF A DOUBLE-HEF OPEN GAAP jacquard, jacquard LIKE SUCH A DRIVE SYSTEM EQUIPPED.
FR2669650B1 (en) * 1990-11-27 1994-04-29 Staubli Verdol MECHANISM FOR CONTROLLING THE FRAMES OF A CROWD FORMING DEVICE.
FR2757544B1 (en) * 1996-12-19 1999-03-05 Staubli Lyon CROWD FORMING DEVICE, MOUNTING METHOD AND JACQUARD TYPE WEAVING EQUIPMENT PROVIDED WITH SUCH A DEVICE
BE1013564A3 (en) * 2000-06-16 2002-04-02 Wiele Michel Van De Nv DEVICE FOR KNIVES beams OF THE LEGAL GUIDE IN A Jacquard machine.
FR2854642B1 (en) * 2003-05-06 2005-07-08 Staubli Lyon CROWN FORMING DEVICE AND JACQUARD TYPE WEAVING EQUIPPED WITH SUCH A DEVICE
BE1016486A4 (en) * 2005-04-08 2006-12-05 Wiele Michel Van De Nv JACQUARD DEVICE.
CN2844161Y (en) * 2005-11-25 2006-12-06 浙江大学 A kind of electronic jacquard machine is griffed mechanism
CN101423995B (en) * 2008-12-18 2012-10-03 宁波川一纺织设备有限公司 Crank double-lift high speed electronic jacquard

Also Published As

Publication number Publication date
KR101662180B1 (en) 2016-10-04
KR20100124668A (en) 2010-11-29
BRPI1001484A2 (en) 2012-03-13
CN101892542B (en) 2014-12-10
FR2945825B1 (en) 2011-06-24
BRPI1001484B1 (en) 2018-12-18
CN101892542A (en) 2010-11-24
ATE550466T1 (en) 2012-04-15
FR2945825A1 (en) 2010-11-26
EP2253749A1 (en) 2010-11-24

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