EP1734165B1 - Insertion device for a two-ply loom and loom incorporating such a device - Google Patents

Insertion device for a two-ply loom and loom incorporating such a device Download PDF

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Publication number
EP1734165B1
EP1734165B1 EP06356062A EP06356062A EP1734165B1 EP 1734165 B1 EP1734165 B1 EP 1734165B1 EP 06356062 A EP06356062 A EP 06356062A EP 06356062 A EP06356062 A EP 06356062A EP 1734165 B1 EP1734165 B1 EP 1734165B1
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EP
European Patent Office
Prior art keywords
comb
rapier
points
teeth
guiding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP06356062A
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German (de)
French (fr)
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EP1734165A1 (en
Inventor
Hans-Dieter Hetzer
Steffen Kaiser
Martin Burkert
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Schoenherr Textilmaschinenbau GmbH
Schonherr Textilmaschinenbau BMBH
Original Assignee
Schoenherr Textilmaschinenbau GmbH
Schonherr Textilmaschinenbau BMBH
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Publication of EP1734165A1 publication Critical patent/EP1734165A1/en
Application granted granted Critical
Publication of EP1734165B1 publication Critical patent/EP1734165B1/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/60—Construction or operation of slay
    • D03D49/62—Reeds mounted on slay
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D39/00—Pile-fabric looms
    • D03D39/16—Double-plush looms, i.e. for weaving two pile fabrics face-to-face
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/271—Rapiers
    • D03D47/272—Rapier bands
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/275—Drive mechanisms
    • D03D47/276—Details or arrangement of sprocket wheels
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms

Definitions

  • the invention relates to a device for inserting a weft yarn for a loom with two superposed sheets, and to a loom equipped with such a device.
  • double-ply looms In the field of double-layer weaving looms, sometimes referred to as “double-ply looms", it is known, for example FR-A-2552455 inserting the weft threads in the crowds defined by the loom by means of rigid lances whose heads are guided, on the one hand, by integral parts of the comb of the loom and, on the other hand, by the comb. These rigid lances have such inertia that their respective drive means must be able to develop significant power, which makes them expensive.
  • the guide means provided in the vicinity of the comb are capable of interacting only with the claws of the lances, which means that, in the case of looms with a large blade width, the lances are guided only on a small part of their length when fully deployed. They must therefore have a relatively high rigidity, which is penalizing in terms of mass and inertia. In addition, these lances impose a significant lateral bulk for the craft.
  • the invention more particularly intends to remedy by proposing a weft insertion device for a loom with two superposed sheets through which the lances can be efficiently guided, while the inertia of the parts in movement can be optimized.
  • the invention relates to a device for inserting weft threads for a loom with two superposed sheets, this device comprising flexible lances. provided with weft yarn feed dogs in a shed and a movable comb between a rear position, compatible with the insertion of weft yarns into the shed, and a striking position.
  • Each lance comprises a claw and a flexible part partially wound on a drive wheel, while each wheel rotates about a fixed axis relative to the frame of the loom and that the comb assembly is equipped with means, distributed according to the width of levee, guiding the flexible part of each lance.
  • the guide means are divided into two series, a first series of which is connected to the comb in the vicinity of its upper part and the second series of which is connected to the comb in the vicinity of its lower part, the first series being dedicated to guiding the part flexible of the upper lance (s), while the second series is dedicated to guiding the flexible part of the lower lance (s).
  • the guide means are able to guide the flexible parts of the lances without them interacting with the teeth of the comb.
  • the series of guide means are each formed by a succession of tabs distributed along the length of the comb and each defining a passage orifice of which at least a portion is substantially complementary in shape to that of the section of the flexible portion of the corresponding lance this passage opening having a shape adapted to guide the flexible portion. At least one of the orifices is provided with an opening for the passage of a junction part between the flexible part and the claw of a lance, such an opening being oriented towards the teeth of the comb.
  • the lances can be effectively guided on most of their trajectory in the crowd through guiding means that interact not with the single claw of each lance, but with its flexible portion or ribbon that extends over most of this trajectory when the spear is fully engaged in a crowd. Since the drive wheel of the flexible part of each lance is not driven by the comb assembly, this assembly is lighter and easier to use. lead.
  • the distribution of the guide means in two distinct series allows to arrange the guide means so that the position of the trajectory of the lances in the crowd is optimized. Since the guiding means are sufficient to guide the flexible parts or strips of the lances alone, these flexible parts are not likely to wear in contact with the front edges of the teeth of the comb.
  • the stroke of the comb must be sufficient so that, when the latter is in a rear configuration compatible with the introduction of a weft thread, the means for supporting the claws are arranged generally inside the body. crowd, whereas, in striking position, these guide means are arranged outside the crowd.
  • This relatively important race requires in practice to increase the distance between the points of striking and the smooth closest to these points of striking.
  • Such a rail can be mounted on a smooth frame or controlled by a Jacquard harness.
  • the greater this distance the longer the race of the pile yarns and warp threads is long, which induces significant stresses on the drive devices and in practice limits the speed of operation of a loom equipped with of these devices.
  • the comb when in the rear position, is located entirely between a plane containing the striking points and a plane perpendicular to the sheets of cloth before their separation, this perpendicular plane passing, for each tooth of the comb, by a point located, relative to that of the points of the front edge of this tooth intended to bear against the points of striking which is furthest from these points of striking at a distance equal to five times the width of the tooth at that particular point of its leading edge.
  • the shape of the comb minimises the distance between the impact points and the control strands of the pile and warp threads, which makes it possible to reduce the maximum strokes that the Jacquard machine has to print to the pile threads or that the fundamental armor mechanics must print to the warp threads.
  • the invention also relates to a loom with two superposed webs equipped with a weft thread insertion device as mentioned above.
  • Such a loom is more economical, easier to install and adjust than trades of the state of the art. It can also operate at a higher speed.
  • the trade M represented to figures 1 and 2 is intended for the formation of two plies N 1 and N 2 of tissues, for example two carpets T 1 and T 2 woven simultaneously and separated from each other by a knife 1 hair cutter carried by a carriage 2 and arranged downstream of two strike points P 1 , P 2 towards which converge respectively two crowds F 1 , F 2 defined by the warp yarns 4 of the loom whose vertical movement is controlled by heddles 3 actuated by a Jacquard harness as well as by warp yarns 4 'whose vertical movement is controlled by healds mounted on heald frames 3', themselves driven by a dobby or a cam mechanism not shown.
  • ⁇ 1 is a median plane of the plies N 1 and N 2 between the points P 1 and P 2 and their separation zone by the knife 1.
  • the plane ⁇ 1 is, in practice, substantially horizontal.
  • the weft threads 5 1 and 5 2 intended to constitute, with the corresponding warp threads, the plies N 1 and N 2 are inserted into the crowds F 1 and F 2 by means of two lances 11 and 12 each comprising a head or claw 111, respectively 121, on which can be hung a weft thread 5, and a flexible strip 112, respectively 122, for driving the corresponding claw in the direction of two axes Y 1 , respectively Y 2 , parallel between them and perpendicular to the wires 4 and 4 'and to the plane of the figure 1 .
  • An assembly 13 forming a comb and movable pivotally about an axis Y 3 parallel to the axes Y 1 and Y 2 comprises a leaf 131 and a comb 132 consisting of a row of teeth mounted on the leaf 131 and driven by the in rotation around the Y axis 3 .
  • the teeth 132a of the combs 132 can thus be brought in abutment against the points P 1 and P 2 , as shown in FIG. figure 2 where the leaf 131 has been pivoted about the axis Y 3 , relative to the position of the figure 1 by means not shown and known per se.
  • Each tooth 132a is defined between a leading edge 132b facing the striking points and a trailing edge 132c facing the rails 3.
  • ⁇ AV is a plane containing the portions 132b 1 of the front edges 132b of the different teeth of the comb 132. This plane is parallel to the directions of introduction of the weft son in the crowds F 1 and F 2 .
  • 132a one portion 132a of each tooth of the farthest leaf 131 that the point P '1.
  • the portions 132a 1 of the teeth 132 are generally rectilinear and delimit the maximum size of the comb towards the rails 3.
  • the comb 132 is mounted on the leaf 131 through a rail 131a receiving the lower ends of the teeth 132a and immobilized by a wedge 131b held in place on the leaf 131 by means known per se and not shown, such as screws.
  • the assembly 13 is equipped with a series S 1 of lugs 133 distributed over substantially the entire length of the comb 132, that is to say, according to the width of the blade. M, and integral with the comb 132.
  • the tabs 133 are mounted in groups of three consoles 134, each console being fixed on a metal section 135 which is itself attached to the upper ends of the teeth 132a, that is, that is to say on the ends of these teeth furthest away from the Y axis 3 .
  • the profile 135 is made of light metal alloy, in particular based on aluminum.
  • Each tab 133 is pierced with an orifice 133a comprising two extensions 133a 1 and 133a 2 of substantially complementary shapes of the upper and lower portions of the cross section of the strip 112, which makes it possible to obtain a guiding effect of the strip 112 which constitutes the flexible portion of the lance 11, according to the width of the upper, as the claw 111 progresses towards the side of the comb 132 ópposed to that through which it enters the crowd.
  • the shape of the orifices 133a thus makes it possible to guide the ribbon 112 without interaction or contact between the lance 11 and the teeth 132a, which avoids premature wear of the ribbon 112 or the claw 111 by friction against the front edges 132b of the teeth 132a.
  • the orifice 133a also comprises a lateral extension 133a 3 .
  • each tab 136 having an orifice 136a whose two extensions 136a 1 and 136a 2 are complementary shapes of the upper and lower parts of the cross section of the ribbon 122, which effectively guides the ribbon 122, which is the flexible portion of the lance 12 engaged in the crowd F 2 , without interaction with the comb 132.
  • An additional extension 136a 3 is provided in a similar manner at the extension 133a 3 of the orifice 133.
  • the orifices 133a and 136a are open towards the comb 132. More specifically, they each define an opening or slot 133b, respectively 136b, in which a joining portion 113 of the claw 111 may slide with the ribbon 112 or a portion 123 of junction of the claw 121 with the ribbon 122. The portions 113 and 123 extend respectively into the extensions 133a 3 and 136a 3 .
  • the extensions 133a 3 and 136a 3 and the openings or slots 133b and 136b are used to guide the claws 111 and 121, by the parts 113 and 123, in their movement back and forth during the insertion of weft son.
  • the overall cross shape of the orifices 133a and 136a serves to guide both the claws 111 and 121, the ribbons 112 and 122 and the parts 113 and 123.
  • the extensions 133a 1 and 133a 2 form two branches of the cross of the orifice 133a whose extension 133a 3 and the opening 133b form two other branches perpendicular to the previous ones. It is the same for the portions of the opening 136b.
  • only certain orifices 133a and 136b have this cross shape.
  • the tabs 133 and 136 are located outside the crowds, so that they do not risk interfering points P 1 and P 2 .
  • two gears 21 and 22 are supported by the frame 50 of the loom and provided with teeth 211, respectively 221, capable of being engaged in openings 114 and 124 formed in the ribbons 112 and 122.
  • the ribbons 112 and 122 are partially wound on the wheels 21 and 22, the portions of the ribbons 112 and 122 located on either side of the wheels 21 and 22 not being parallel. As the ribbons are wound about 90 ° on the wheels, their portions in question are substantially perpendicular. Of course, another winding angle of the ribbons may be chosen, preferably in a range between 30 ° and 180 °.
  • a 21 denotes the geometric axis of rotation of the wheel 21.
  • a 22 is the geometric axis of rotation of the wheel 22.
  • the axes A 21 and A 22 are fixed relative to the frame 50. In the example shown the axes A 21 and A 22 are merged. This is however not mandatory, the axes A 21 and A 22 may not even be parallel.
  • guiding means 31 and 32 are respectively provided for the ribbons 112 and 122, on the one hand between the wheels 21 and 22 and the comb 132, on the other hand between the wheels and the ends of the ribbons opposite their claws.
  • the wheels 21 and 22 must drive the ribbons 112 and 122 when the assembly 13 is in the position of the figure 1 in which the orifices 133a and 136a respectively face the insertion zones of the weft threads in the crowds F 1 and F 2 .
  • Z is the area of the craft located upstream of the comb 132 in the configuration of the figure 1 , the rails 3 driven by the Jacquard harness and the heddles driven by the frames 3 'being arranged in this zone Z.
  • the comb 132 is curved , with its concavity turned towards points P 1 and P 2 . More specifically, the teeth 132a are divided into two elongated portions 132a 1 and 132a 2 , substantially rectilinear, each centered on a longitudinal axis B 1 or B 2 and meeting in a connection zone 132a 3 .
  • the axes B 1 and B 2 form between them an angle ⁇ of the order of 30 °. In practice, the angle ⁇ can be chosen between 15 and 45 °.
  • the axes A 21 and A 22 are inclined relative to the plane ⁇ 1 by an angle ⁇ of the order of 75 °, so that the lances 11 and 12 can be driven into the succession of orifices 133a. , respectively 136a, in the configuration of the figure 1 , while the comb 132 is curved, as indicated above, and that the tabs 133 and 136 can be disposed outside the crowds F 1 and F 2 in the configuration of the figure 2 .
  • the angle ⁇ can have a value of between 50 and 90 °, preferably between 70 and 80 °.
  • the orientation of the openings 133b and 136b towards the teeth of the loom corresponds to the construction from the junction between claws and ribbons. It allows to obtain a small footprint of each spear, formed of a claw and a ribbon, in the crowd.
  • each tooth 132a is farthest from the plane ⁇ 2 when the comb is in the rear position.
  • Note 132 the width of a tooth 132a taken parallel to the plane ⁇ 1 at its point P ' 1 .
  • a plane ⁇ 3 parallel to the plane ⁇ 2 that is to say perpendicular to the tissue plies N 1 and N 2 and passing through a point Q 1 located at a distance from the point P ' 1 , taken in parallel in the plane ⁇ 1 , equal to twice the value of the width l 132 .
  • the comb 132 is situated entirely between the planes ⁇ 2 and ⁇ 3 when it is in its rear position shown in FIGS. figures 1 and 1A . This makes it possible to minimize the distance d between the striking points P 1 and P 2 and the zone Z and to consequently reduce the maximum strokes of the control strands of the pile yarns and the warp yarns.
  • the distance of can be chosen with a value less than or equal to five times the width 132 , preferably three times this width.
  • the plane ⁇ 3 extends beyond the convex portion 132c 3 of the trailing edge 132c of each tooth 132a corresponding to the junction zone 132a 3 .
  • 132 the width of a tooth 132a in its portion 132a 1 , this width being taken perpendicular to the axis B 1 .
  • the width 132 taken perpendicular to the axis B 2 , of a tooth 132a in its part 132a 2 is noted.
  • the value of ' 132 is greater than that of 132 , which corresponds to the fact that the teeth 132a are wider at their base near the wing 131 than at their end farthest from the wing. This takes into account that the teeth 132a are more stressed at their base, their profile is thus otpimisé.
  • legs 133 and 136 allow the lances of the lances to be guided over the lug width.
  • This embodiment differs from the previous one in that the comb 132 is generally rectilinear, the teeth 132a being defined between a front edge 132b and a rear edge 132c generally rectilinear and parallel, except at a portion 132b 1 of the edge 132b which passes through the points P ' 1 and P' 2 intended to support the strike points of the trade.
  • the central axes B 1 and B2 of the portions 132a 1 and 132a 2 of the teeth 132a are parallel.
  • the part 132b 1 makes it possible to define a plane ⁇ AV which forms an angle ⁇ of the order of 45 ° with the axes B 1 and B 2 .
  • a plane ⁇ 3 perpendicular to the tissue plies prior to their separation and passing through a point Q 1 whose distance of, taken parallel to a plane ⁇ 1 defined as in the first embodiment, is equal to twice the width 132 of the tooth 132 at the point P ' 1 .
  • This value of d is, in practice, less than five times that of 132 , preferably three times that width.
  • the comb 132 is, in the rear position, located completely between the plane of the strike points and the plane ⁇ 3 .
  • This geometry of the teeth of the comb 132 also makes it possible to obtain a good compactness, which limits the strokes necessary for the warp threads and the bristles.
  • the axes B 1 and B 2 of the straight portions 132a 1 and 132a 2 of the teeth 132a of a comb 132 may form an angle ⁇ between them so that the portion of the teeth 132a furthest from the striking points is the part 132c 3 of the trailing edge 132c, at the junction zone 132a 3 between the parts 132a 1 and 132a 2 .
  • lugs 133 and 136 make it possible to guide the lances of the lances to the width of the lug.
  • the craft advantageously comprises two upper lances and two lower lances, the upper lances joining from the sides of the crowds in the center of the upper crowd F 1 , while the lower lances meet at the center of the lower crowd F 2 .
  • the weft thread then moves from one claw to another.
  • the guide lugs 133 and 136 are then distributed, according to the width of lee, in two groups intended to guide respectively the lances introduced by one side of the crowds and those introduced by the other side.
  • the invention has been shown with a comb movable pivotally about the Y axis 3 . It also applies to looms equipped with a comb with a substantially parallel translation movement, the shape of the comb then being adapted. In this case, the two points of the front edge of each tooth intended to hit the strike points are at the same distance from these striking points.
  • a plane equivalent to the plane ⁇ 3 mentioned above can be defined at one or other of these particular points of the teeth.

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Abstract

The device has wheels (21, 22) rotating around axes (A 21, A 22) with respect to a frame of a loom. An assembly forms a reed comprising attachments (133, 136) that are distributed in two series (S 1, S 2) along a reed width of the loom. The attachments are provided for guiding flexible parts (112, 122) of rapiers such that the parts (112, 122) do not contact the teeth (132a) of a reed (132). The reed is situated between a plane containing points and a plane perpendicular to fabric plies before the separation of the plies. An independent claim is also included for a loom to be woven comprising a weft yarn insertion device.

Description

L'invention a trait à un dispositif d'insertion d'un fil de trame pour un métier à deux nappes superposées, ainsi qu'à un métier à tisser équipé d'un tel dispositif.The invention relates to a device for inserting a weft yarn for a loom with two superposed sheets, and to a loom equipped with such a device.

Dans le domaine des métiers à tisser à deux nappes superposées, parfois qualifiées de « métier double nappe », il est connu, par exemple de FR-A-2552455 , d'insérer les fils de trame dans les foules définies par le métier au moyen de lances rigides dont les têtes sont guidées, d'une part, par des pièces solidaires du peigne du métier et, d'autre part, par le peigne. Ces lances rigides ont une inertie telle que leurs moyens d'entraînement respectifs doivent être aptes à développer une puissance importante, ce qui les rend onéreux.In the field of double-layer weaving looms, sometimes referred to as "double-ply looms", it is known, for example FR-A-2552455 inserting the weft threads in the crowds defined by the loom by means of rigid lances whose heads are guided, on the one hand, by integral parts of the comb of the loom and, on the other hand, by the comb. These rigid lances have such inertia that their respective drive means must be able to develop significant power, which makes them expensive.

Il est également connu de DE-A-41 31 745 d'utiliser des lances comprenant une tête ou griffe d'entraînement des fils de trame et une partie pourvue d'ouvertures dans lesquelles engrènent les dents d'une roue entraînée par un moteur déplacé par un battant d'entraînement du peigne du métier. Les moteurs rapportés sur le peigne augmentent sensiblement l'inertie du battant, ce qui limite la vitesse de fonctionnement du métier.It is also known to DE-A-41 31 745 using lances comprising a weft threading head or claw and a portion provided with openings in which the teeth of a wheel driven by a motor moved by a lug driving the comb of the loom. The engines reported on the comb substantially increase the inertia of the wing, which limits the speed of operation of the craft.

Dans ces matériels connus, les moyens de guidage prévus au voisinage du peigne sont aptes à interagir uniquement avec les griffes des lances, ce qui induit que, dans le cas de métiers à tisser de largeur d'empeignage importante, les lances ne sont guidées que sur une faible partie de leur longueur lorsqu'elles sont complètement déployées. Elles doivent donc avoir une rigidité relativement importante, ce qui est pénalisant en terme de masse et d'inertie. De plus, ces lances imposent un encombrement latéral important pour le métier.In these known materials, the guide means provided in the vicinity of the comb are capable of interacting only with the claws of the lances, which means that, in the case of looms with a large blade width, the lances are guided only on a small part of their length when fully deployed. They must therefore have a relatively high rigidity, which is penalizing in terms of mass and inertia. In addition, these lances impose a significant lateral bulk for the craft.

Il est également connu de CN-Y-2507874 et CN-A-87108047 d'utiliser des roues dont les axes sont mobiles par rapport au bâti du métier, en conjonction avec des moyens de guidage répartis sur le trajet d'une lance. Ces moyens de guidage ne sont pas adaptés à des lances dont la partie flexible est reliée à la griffe par une partie de jonction.It is also known to CN-Y-2507874 and CN-A-87108047 to use wheels whose axes are movable relative to the frame of the loom, in conjunction with guide means distributed over the path of a lance. These guide means are not adapted to lances whose flexible portion is connected to the claw by a joining portion.

C'est à ces inconvénients qu'entend plus particulièrement remédier l'invention en proposant un dispositif d'insertion de fils de trame pour un métier à deux nappes superposées grâce auquel les lances peuvent être efficacement guidées, alors que l'inertie des pièces en mouvement peut être optimisée.It is these drawbacks that the invention more particularly intends to remedy by proposing a weft insertion device for a loom with two superposed sheets through which the lances can be efficiently guided, while the inertia of the parts in movement can be optimized.

Dans cet esprit, l'invention concerne un dispositif d'insertion de fils de trame pour métier à deux nappes superposées, ce dispositif comprenant des lances flexibles pourvues de griffes d'entraînement de fils de trame dans une foule et un peigne mobile entre une position arrière, compatible avec l'insertion de fils de trame dans la foule, et une position de frappe. Chaque lance comprend une griffe et une partie flexible partiellement enroulée sur une roue d'entraînement, alors que chaque roue tourne autour d'un axe fixe par rapport au bâti du métier et que l'ensemble formant peigne est équipé de moyens, répartis selon la largeur d'empeignage, de guidage de la partie flexible de chaque lance. Les moyens de guidage sont répartis en deux séries, dont une première série est reliée au peigne au voisinage de sa partie supérieure et dont la seconde série est reliée au peigne au voisinage de sa partie inférieure, la première série étant dédiée au guidage de la partie flexible de la ou des lance(s) supérieure(s), alors que la seconde série est dédiée au guidage de la partie flexible de la ou des lance(s) inférieure(s). Les moyens de guidage sont aptes à guider les parties flexibles des lances sans que celles-ci interagissent avec les dents du peigne. Les séries de moyens de guidage sont formées chacune par une succession de pattes réparties selon la longueur du peigne et définissant chacune un orifice de passage dont une partie au moins est de forme sensiblement complémentaire de celle de la section de la partie flexible de la lance correspondante, cet orifice de passage ayant une forme adaptée pour guider la partie flexible. L'un au moins des orifices est pourvu d'une ouverture de passage d'une partie de jonction entre la partie flexible et la griffe d'une lance, une telle ouverture étant orientée vers les dents du peigne.With this in mind, the invention relates to a device for inserting weft threads for a loom with two superposed sheets, this device comprising flexible lances. provided with weft yarn feed dogs in a shed and a movable comb between a rear position, compatible with the insertion of weft yarns into the shed, and a striking position. Each lance comprises a claw and a flexible part partially wound on a drive wheel, while each wheel rotates about a fixed axis relative to the frame of the loom and that the comb assembly is equipped with means, distributed according to the width of levee, guiding the flexible part of each lance. The guide means are divided into two series, a first series of which is connected to the comb in the vicinity of its upper part and the second series of which is connected to the comb in the vicinity of its lower part, the first series being dedicated to guiding the part flexible of the upper lance (s), while the second series is dedicated to guiding the flexible part of the lower lance (s). The guide means are able to guide the flexible parts of the lances without them interacting with the teeth of the comb. The series of guide means are each formed by a succession of tabs distributed along the length of the comb and each defining a passage orifice of which at least a portion is substantially complementary in shape to that of the section of the flexible portion of the corresponding lance this passage opening having a shape adapted to guide the flexible portion. At least one of the orifices is provided with an opening for the passage of a junction part between the flexible part and the claw of a lance, such an opening being oriented towards the teeth of the comb.

Les lances peuvent être efficacement guidées sur l'essentiel de leur trajectoire dans la foule grâce aux moyens de guidage qui interagissent non pas avec la seule griffe de chaque lance, mais avec sa partie flexible ou ruban qui s'étend sur l'essentiel de cette trajectoire lorsque la lance est complètement engagée dans une foule. Comme la roue d'entraînement de la partie flexible de chaque lance n'est pas entraînée par l'ensemble formant peigne, cet ensemble est plus léger et plus facile à entraîner. La répartition des moyens de guidage en deux séries distinctes permet d'agencer les moyens de guidage de façon à ce que la position de la trajectoire des lances dans la foule soit optimisée. Comme les moyens de guidage sont suffisants pour guider à eux seuls les parties flexibles ou rubans des lances, ces parties flexibles ne risquent pas de s'user au contact des bords avant des dents du peigne.The lances can be effectively guided on most of their trajectory in the crowd through guiding means that interact not with the single claw of each lance, but with its flexible portion or ribbon that extends over most of this trajectory when the spear is fully engaged in a crowd. Since the drive wheel of the flexible part of each lance is not driven by the comb assembly, this assembly is lighter and easier to use. lead. The distribution of the guide means in two distinct series allows to arrange the guide means so that the position of the trajectory of the lances in the crowd is optimized. Since the guiding means are sufficient to guide the flexible parts or strips of the lances alone, these flexible parts are not likely to wear in contact with the front edges of the teeth of the comb.

Avec les matériels connus, la course du peigne doit être suffisante pour que, lorsque celui-ci est en configuration arrière compatible avec l'introduction d'un fil de trame, les moyens de support des griffes soient disposés globalement à l'intérieur de la foule, alors que, en position de frappe, ces moyens de guidage sont disposés à l'extérieur de la foule. Cette course relativement importante impose en pratique d'augmenter la distance entre les points de frappe et la lisse la plus proche de ces points de frappe. Une telle lisse peut être montée sur un cadre de lisses ou commandée par un harnais Jacquard. Or, plus cette distance est grande, plus la course des fils de poil et des fils de chaîne est longue, ce qui induit des sollicitations importantes sur les dispositifs d'entraînement et limite en pratique la vitesse de fonctionnement d'un métier à tisser équipé de ces dispositifs.With known materials, the stroke of the comb must be sufficient so that, when the latter is in a rear configuration compatible with the introduction of a weft thread, the means for supporting the claws are arranged generally inside the body. crowd, whereas, in striking position, these guide means are arranged outside the crowd. This relatively important race requires in practice to increase the distance between the points of striking and the smooth closest to these points of striking. Such a rail can be mounted on a smooth frame or controlled by a Jacquard harness. However, the greater this distance, the longer the race of the pile yarns and warp threads is long, which induces significant stresses on the drive devices and in practice limits the speed of operation of a loom equipped with of these devices.

Afin d'optimiser la course des fils de poils et de chaîne, on prévoit que le peigne, lorsqu'il est en position arrière, est situé en totalité entre un plan contenant les points de frappe et un plan perpendiculaire aux nappes de tissu avant leur séparation, ce plan perpendiculaire passant, pour chaque dent du peigne, par un point situé, par rapport à celui des points du bord avant de cette dent destinés à venir en appui contre les points de frappe qui est le plus éloigné de ces points de frappe, à une distance égale à cinq fois la largeur de la dent au niveau de ce point particulier de son bord avant.In order to optimize the running of the pile and warp threads, it is expected that the comb, when in the rear position, is located entirely between a plane containing the striking points and a plane perpendicular to the sheets of cloth before their separation, this perpendicular plane passing, for each tooth of the comb, by a point located, relative to that of the points of the front edge of this tooth intended to bear against the points of striking which is furthest from these points of striking at a distance equal to five times the width of the tooth at that particular point of its leading edge.

Grâce à la forme du peigne, la distance entre les points de frappe et les lisses de commande des fils de poil et de chaîne est minimisée, ce qui permet de réduire les courses maximales que la machine Jacquard doit imprimer aux fils de poil ou que la mécanique d'armure fondamentale doit imprimer aux fils de chaîne.Thanks to the shape of the comb, the distance between the impact points and the control strands of the pile and warp threads is minimized, which makes it possible to reduce the maximum strokes that the Jacquard machine has to print to the pile threads or that the fundamental armor mechanics must print to the warp threads.

Selon d'autres aspects avantageux mais non obligatoires, un tel dispositif d'insertion peut incorporer une ou plusieurs des caractéristiques suivantes :

  • Selon certains modes de réalisation, le peigne est globalement courbe, avec sa concavité tournée vers les points de frappe, les dents du peigne comprenant chacune deux parties allongées et centrées chacune sur un axe longitudinal, ces axes longitudinaux formant entre eux un angle compris entre 15 et 45°, de préférence de l'ordre de 30°. Dans ce cas, le point du bord avant de la dent qui est destiné à venir en appui contre un point de frappe est défini dans une zone de jonction entre les parties allongées d'une dent, le plan perpendiculaire étant situé au-delà d'une partie concave du bord arrière de chaque dent au niveau de cette zone.
  • Selon un autre mode de réalisation, le peigne peut être sensiblement rectiligne.
  • La partie du peigne qui définit son encombrement maximal à l'opposé des points de frappe, lorsque le peigne est en position arrière, s'étend selon une direction globalement perpendiculaire aux nappes de tissus lorsque le peigne est dans cette position, alors qu'un plan géométrique comprenant les points des bords des dents du peigne destinés à venir en appui contre les points de frappe est perpendiculaire à ces nappes lorsque le peigne est en position de frappe. La direction précitée est avantageusement inclinée par rapport au plan précité, d'un angle qui est, de préférence, compris entre 15 et 45°.
  • L'un au moins des moyens de guidage peut également guider la griffe d'une lance dans son mouvement de va et vient.
  • L'axe de rotation de la roue d'entraînement de la partie flexible de chaque lance est incliné, par rapport à un plan parallèle aux nappes de tissu avant leur séparation d'un angle compris entre 50 et 90°, de préférence entre 60 et 80°, de préférence encore de l'ordre de 75°. L'orientation particulière de l'axe autour duquel tournent les roues d'entraînement permet une mise en mouvement de ces parties flexibles avec une orientation compatible avec celle du peigne lorsque celui-ci est en position arrière.
  • L'un au moins des orifices présente une forme globalement en croix, deux branches de cette croix étant dédiées au guidage de la partie flexible de la lance correspondante, alors que les deux autres branches qui sont sensiblement perpendiculaires aux précédentes et dont l'une débouche en direction du peigne, sont dédiées au guidage de la griffe de cette lance et d'une partie de jonction entre la griffe et la partie flexible. On peut également prévoir que les pattes formant les moyens de guidage de la partie flexible de la ou des lances supérieures sont supportées par le peigne, alors que les pattes formant les moyens de guidage de la partie flexible de la ou des lances inférieures sont supportées au voisinage de la partie inférieure du peigne. Les pattes qui forment les moyens de guidage de la partie flexible de la ou des lances supérieures peuvent être supportées par un chapeau coiffant l'ensemble des dents du peigne et, de préférence, réalisé par un profilé métallique fixé sur les extrémités supérieures de ces dents. Le matériau utilisé pour le profilé est de préférence un alliage léger, notamment un alliage à base d'aluminium.
  • Le peigne et/ou un organe solidaire du peigne porte(nt) des moyens de calibration de la foule qui, pour ce qui concerne la foule supérieure, peuvent être formés par une partie du chapeau précité.
  • Les dents du peigne sont plus larges au niveau de leur base qu'au niveau de leur extrémité la plus éloignée du battant.
According to other advantageous but not mandatory aspects, such an insertion device may incorporate one or more of the following features:
  • According to some embodiments, the comb is generally curved, with its concavity facing the striking points, the comb teeth each comprising two elongate parts and each centered on a longitudinal axis, these longitudinal axes forming between them an angle of between and 45 °, preferably of the order of 30 °. In this case, the point of the leading edge of the tooth which is intended to abut against a striking point is defined in a junction zone between the elongate portions of a tooth, the perpendicular plane being situated beyond a concave portion of the trailing edge of each tooth at this area.
  • According to another embodiment, the comb may be substantially rectilinear.
  • The part of the comb which defines its maximum bulkiness opposite the striking points, when the comb is in the rear position, extends in a direction generally perpendicular to the plies of tissue when the comb is in this position, whereas a geometric plane comprising the points of the edges of the comb teeth intended to abut against the striking points is perpendicular to these plies when the comb is in the striking position. The aforementioned direction is advantageously inclined relative to the aforementioned plane, an angle which is preferably between 15 and 45 °.
  • At least one of the guide means can also guide the claw of a spear in its movement back and forth.
  • The axis of rotation of the drive wheel of the flexible part of each lance is inclined, with respect to a plane parallel to the sheets of fabric before their separation at an angle of between 50 and 90 °, preferably between 60 and 80 °, more preferably of the order of 75 °. The particular orientation of the axis around which the drive wheels rotate allows these flexible parts to be set in motion with an orientation compatible with that of the comb when the latter is in the rear position.
  • At least one of the orifices has a shape generally cross, two branches of this cross being dedicated to guiding the flexible portion of the corresponding lance, while the other two branches which are substantially perpendicular to the previous and one of which opens in the direction of the comb, are dedicated to guiding the claw of this lance and a portion of junction between the claw and the flexible part. It is also possible that the tabs forming the guiding means of the flexible part of the or upper lances are supported by the comb, while the tabs forming the guide means of the flexible portion of the lower lances or are supported in the vicinity of the lower part of the comb. The tabs which form the guide means of the flexible part of the upper lances or can be supported by a cap covering all the teeth of the comb and, preferably, made by a metal section fixed on the upper ends of these teeth . The material used for the profile is preferably a light alloy, especially an aluminum-based alloy.
  • The comb and / or an integral member of the comb carries (s) crowd calibration means which, with respect to the upper shed, may be formed by a portion of the aforementioned cap.
  • The teeth of the comb are wider at their base than at their end farthest from the wing.

L'invention concerne également un métier à tisser à deux nappes superposées équipé d'un dispositif d'insertion de fils de trame tel que mentionné ci-dessus.The invention also relates to a loom with two superposed webs equipped with a weft thread insertion device as mentioned above.

Un tel métier à tisser est plus économique, plus facile à installer et à régler que les métiers de l'état de la technique. Il peut en outre fonctionner à une vitesse plus élevée.Such a loom is more economical, easier to install and adjust than trades of the state of the art. It can also operate at a higher speed.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre de trois modes de réalisation d'un dispositif d'insertion de fils de trame 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 coupe de principe d'un métier à tisser conforme à un premier mode de réalisation de l'invention équipé d'un dispositif d'insertion de fils de trame conforme à l'invention dans une première position de fonctionnement ;
  • la figure 1A est une vue à plus grande échelle du détail 1A à la figure 1, la trace des fils de chaîne et des lisses étant omises pour la clarté du dessin ;
  • la figure 2 est une coupe analogue à la figure 1, alors que le métier est dans une seconde position de fonctionnement ;
  • la figure 3 est une vue en perspective de certains éléments constitutifs du dispositif d'insertion du métier des figures 1 et 2 ;
  • la figure 4 est une vue à plus grande échelle des seuls éléments de guidage des parties flexibles des lances ;
  • la figure 5 est une vue analogue à la figure 1A pour un dispositif conforme à un second mode de réalisation de l'invention et
  • la figure 6 est une vue partielle, du type de la figure 5 mais à plus petite échelle, pour un dispositif conforme à un troisième mode de réalisation de l'invention.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of three embodiments of a weft insertion device and a loom. in accordance with its principle, given solely by way of example and with reference to the appended drawings in which:
  • the figure 1 is a basic section of a loom according to a first embodiment of the invention equipped with a weft son insertion device according to the invention in a first operating position;
  • the Figure 1A is a larger-scale view of detail 1A to the figure 1 the trace of the warp and healds being omitted for the sake of clarity;
  • the figure 2 is a cut similar to the figure 1 while the loom is in a second operating position;
  • the figure 3 is a perspective view of certain constituent elements of the insertion device of the trade of figures 1 and 2 ;
  • the figure 4 is an enlarged view of the only guiding elements of the flexible parts of the lances;
  • the figure 5 is a view similar to the Figure 1A for a device according to a second embodiment of the invention and
  • the figure 6 is a partial view, of the type of the figure 5 but on a smaller scale, for a device according to a third embodiment of the invention.

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

On note π1 un plan médian des nappes N1 et N2 entre les points P1 et P2 et leur zone de séparation par le couteau 1. Le plan π1 est, en pratique, sensiblement horizontal.Π 1 is a median plane of the plies N 1 and N 2 between the points P 1 and P 2 and their separation zone by the knife 1. The plane π 1 is, in practice, substantially horizontal.

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

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

Chaque dent 132a est définie entre un bord avant 132b tourné vers les points de frappe et un bord arrière 132c tourné vers les lisses 3.Each tooth 132a is defined between a leading edge 132b facing the striking points and a trailing edge 132c facing the rails 3.

On considère la portion 132b1 du bord avant 132b qui relie les points P'1 et P'2 du bord 132b destinés à venir en appui contre les points de frappe P1 et P2. On note πAV un plan contenant les portions 132b1 des bords avant 132b des différentes dents du peigne 132. Ce plan est parallèle aux directions d'introduction des fils de trame dans les foules F1 et F2.Considering the portion 132b 1 of the front edge 132b which connects the points P ' 1 and P' 2 of the edge 132b intended to abut against the strike points P 1 and P 2 . Π AV is a plane containing the portions 132b 1 of the front edges 132b of the different teeth of the comb 132. This plane is parallel to the directions of introduction of the weft son in the crowds F 1 and F 2 .

On note 132a1 la portion de chaque dent 132a plus éloignée du battant 131 que le point P'1. Comme il ressort plus particulièrement de la figure 1, les portions 132a1 des dents 132 sont globalement rectilignes et délimitent l'encombrement maximal du peigne en direction des lisses 3.It is noted 132a one portion 132a of each tooth of the farthest leaf 131 that the point P '1. As is clear from the figure 1 the portions 132a 1 of the teeth 132 are generally rectilinear and delimit the maximum size of the comb towards the rails 3.

Le peigne 132 est monté sur le battant 131 grâce à un rail 131a recevant les extrémités inférieures des dents 132a et immobilisé par un coin 131b maintenu en place sur le battant 131 par des moyens connus en soi et non représentés, tels que des vis.The comb 132 is mounted on the leaf 131 through a rail 131a receiving the lower ends of the teeth 132a and immobilized by a wedge 131b held in place on the leaf 131 by means known per se and not shown, such as screws.

Pour assurer une trajectoire sensiblement rectiligne de la griffe 111, l'ensemble 13 est équipé d'une série S1 de pattes 133 réparties sur sensiblement toute la longueur du peigne 132, c'est-à-dire selon la largeur d'empeignage du métier M, et solidaires du peigne 132. Les pattes 133 sont montées par groupe de trois sur des consoles 134, chaque console étant fixée sur un profilé métallique 135 qui est lui-même fixé sur les extrémités supérieures des dents 132a, c'est-à-dire sur les extrémités de ces dents les plus éloignées de l'axe Y3. Le profilé 135 est réalisé en alliage métallique léger, notamment à base d'aluminium.To ensure a substantially rectilinear trajectory of the claw 111, the assembly 13 is equipped with a series S 1 of lugs 133 distributed over substantially the entire length of the comb 132, that is to say, according to the width of the blade. M, and integral with the comb 132. The tabs 133 are mounted in groups of three consoles 134, each console being fixed on a metal section 135 which is itself attached to the upper ends of the teeth 132a, that is, that is to say on the ends of these teeth furthest away from the Y axis 3 . The profile 135 is made of light metal alloy, in particular based on aluminum.

Chaque patte 133 est percée d'un orifice 133a comprenant deux extensions 133a1 et 133a2 de formes sensiblement complémentaires des parties haute et basse de la section transversale du ruban 112, ce qui permet d'obtenir un effet de guidage du ruban 112 qui constitue la partie flexible de la lance 11, selon la largeur de l'empeignage, au fur et à mesure que la griffe 111 progresse en direction du côté du peigne 132 ópposé à celui par lequel elle pénètre dans la foule. La forme des orifices 133a permet donc de guider le ruban 112 sans interaction ou contact entre la lance 11 et les dents 132a, ce qui évite une usure prématurée du ruban 112 ou de la griffe 111 par frottement contre les bords avant 132b des dents 132a.Each tab 133 is pierced with an orifice 133a comprising two extensions 133a 1 and 133a 2 of substantially complementary shapes of the upper and lower portions of the cross section of the strip 112, which makes it possible to obtain a guiding effect of the strip 112 which constitutes the flexible portion of the lance 11, according to the width of the upper, as the claw 111 progresses towards the side of the comb 132 ópposed to that through which it enters the crowd. The shape of the orifices 133a thus makes it possible to guide the ribbon 112 without interaction or contact between the lance 11 and the teeth 132a, which avoids premature wear of the ribbon 112 or the claw 111 by friction against the front edges 132b of the teeth 132a.

A la figure 4, la trace des parties constitutives des lances 11 et 12 est représentée en traits mixtes.To the figure 4 the trace of the constituent parts of the lances 11 and 12 is shown in phantom.

L'orifice 133a comprend également une extension latérale 133a3.The orifice 133a also comprises a lateral extension 133a 3 .

De la même façon, une série S2 de pattes 136 est montée sur des consoles 137 fixées sur le battant 131, chaque patte 136 ayant un orifice 136a dont deux extensions 136a1 et 136a2 sont de formes complémentaires des parties haute et basse de la section transversale du ruban 122, ce qui permet de guider efficacement le ruban 122, qui constitue la partie flexible de la lance 12 engagée dans la foule F2, sans interaction avec le peigne 132. Une extension supplémentaire 136a3 est prévue, de façon similaire à l'extension 133a3 de l'orifice 133.In the same way, a series S 2 of tabs 136 is mounted on brackets 137 fixed to the leaf 131, each tab 136 having an orifice 136a whose two extensions 136a 1 and 136a 2 are complementary shapes of the upper and lower parts of the cross section of the ribbon 122, which effectively guides the ribbon 122, which is the flexible portion of the lance 12 engaged in the crowd F 2 , without interaction with the comb 132. An additional extension 136a 3 is provided in a similar manner at the extension 133a 3 of the orifice 133.

Les orifices 133a et 136a sont ouverts en direction du peigne 132. Plus précisément, ils définissent chacun une ouverture ou fente 133b, respectivement 136b, dans laquelle peut coulisser une partie 113 de jonction de la griffe 111 avec le ruban 112 ou une partie 123 de jonction de la griffe 121 avec le ruban 122. Les parties 113 et 123 s'étendent respectivement jusque dans les extensions 133a3 et 136a3. Ainsi, les extensions 133a3 et 136a3 et les ouvertures ou fentes 133b et 136b permettent de guider les griffes 111 et 121, par les parties 113 et 123, dans leur déplacement de va et vient lors de l'insertion des fils de trame.The orifices 133a and 136a are open towards the comb 132. More specifically, they each define an opening or slot 133b, respectively 136b, in which a joining portion 113 of the claw 111 may slide with the ribbon 112 or a portion 123 of junction of the claw 121 with the ribbon 122. The portions 113 and 123 extend respectively into the extensions 133a 3 and 136a 3 . Thus, the extensions 133a 3 and 136a 3 and the openings or slots 133b and 136b are used to guide the claws 111 and 121, by the parts 113 and 123, in their movement back and forth during the insertion of weft son.

En d'autres termes, la forme globalement en croix des orifices 133a et 136a permet de guider à la fois les griffes 111 et 121, les rubans 112 et 122 et les parties 113 et 123. Les extensions 133a1 et 133a2 forment deux branches de la croix de l'orifice 133a dont l'extension 133a3 et l'ouverture 133b forment deux autres branches perpendiculaires aux précédentes. Il en est de même pour les portions de l'ouverture 136b. En variante, seuls certains orifices 133a et 136b ont cette forme en croix.In other words, the overall cross shape of the orifices 133a and 136a serves to guide both the claws 111 and 121, the ribbons 112 and 122 and the parts 113 and 123. The extensions 133a 1 and 133a 2 form two branches of the cross of the orifice 133a whose extension 133a 3 and the opening 133b form two other branches perpendicular to the previous ones. It is the same for the portions of the opening 136b. As a variant, only certain orifices 133a and 136b have this cross shape.

Dans la configuration de la figure 2, les pattes 133 et 136 sont situées à l'extérieur des foules, de sorte qu'elles ne risquent pas d'interférer les points P1 et P2.In the configuration of the figure 2 , the tabs 133 and 136 are located outside the crowds, so that they do not risk interfering points P 1 and P 2 .

Pour permettre la mise en mouvement des lances 11 et 12 dans la direction des axes Y1 et Y2, deux roues dentées 21 et 22 sont supportées par le bâti 50 du métier et pourvues de dents 211, respectivement 221, aptes à être engagées dans des ouvertures 114, respectivement 124, ménagées dans les rubans 112 et 122. Les rubans 112 et 122 sont partiellement enroulés sur les roues 21 et 22, les portions des rubans 112 et 122 situées de part et d'autre des roues 21 et 22 n'étant pas parallèles. Comme les rubans sont enroulés sur environ 90° sur les roues, leurs portions en question sont sensiblement perpendiculaires. Bien entendu, un autre angle d'enroulement des rubans peut être choisi, de préférence dans une plage comprise entre 30° et 180°.To allow the movement of the lances 11 and 12 in the direction of the axes Y 1 and Y 2 , two gears 21 and 22 are supported by the frame 50 of the loom and provided with teeth 211, respectively 221, capable of being engaged in openings 114 and 124 formed in the ribbons 112 and 122. The ribbons 112 and 122 are partially wound on the wheels 21 and 22, the portions of the ribbons 112 and 122 located on either side of the wheels 21 and 22 not being parallel. As the ribbons are wound about 90 ° on the wheels, their portions in question are substantially perpendicular. Of course, another winding angle of the ribbons may be chosen, preferably in a range between 30 ° and 180 °.

On note A21 l'axe géométrique de rotation de la roue 21. On note A22 l'axe géométrique de rotation de la roue 22. Les axes A21 et A22 sont fixes par rapport au bâti 50. Dans l'exemple représenté, les axes A21 et A22 sont confondus. Ceci n'est cependant pas obligatoire, les axes A21 et A22 pouvant même ne pas être parallèles.A 21 denotes the geometric axis of rotation of the wheel 21. A 22 is the geometric axis of rotation of the wheel 22. The axes A 21 and A 22 are fixed relative to the frame 50. In the example shown the axes A 21 and A 22 are merged. This is however not mandatory, the axes A 21 and A 22 may not even be parallel.

Comme représenté en traits mixtes uniquement à la figure 3, des moyens de guidage 31 et 32 sont respectivement prévus pour les rubans 112 et 122, d'une part entre les roues 21 et 22 et le peigne 132, d'autre part entre les roues et les extrémités des rubans opposées à leurs griffes.As shown in phantom only at the figure 3 , guiding means 31 and 32 are respectively provided for the ribbons 112 and 122, on the one hand between the wheels 21 and 22 and the comb 132, on the other hand between the wheels and the ends of the ribbons opposite their claws.

Les roues 21 et 22 doivent entraîner les rubans 112 et 122 lorsque l'ensemble 13 est dans la position de la figure 1 dans laquelle les orifices 133a et 136a sont respectivement en regard des zones d'insertion des fils de trame dans les foules F1 et F2.The wheels 21 and 22 must drive the ribbons 112 and 122 when the assembly 13 is in the position of the figure 1 in which the orifices 133a and 136a respectively face the insertion zones of the weft threads in the crowds F 1 and F 2 .

On note Z la zone du métier située en amont du peigne 132 dans la configuration de la figure 1, les lisses 3 entraînées par le harnais Jacquard et les lisses entraînées par les cadres 3' étant disposés dans cette zone Z.Z is the area of the craft located upstream of the comb 132 in the configuration of the figure 1 , the rails 3 driven by the Jacquard harness and the heddles driven by the frames 3 'being arranged in this zone Z.

On note d la distance, prise parallèlement au plan π1, entre, d'une part, un plan π2 contenant les points de frappe P1 et P2 et, d'autre part, la zone Z. Le peigne 132 est courbé, avec sa concavité tournée en direction des points P1 et P2. Plus précisément, les dents 132a sont divisées en deux parties allongées 132a1 et 132a2, sensiblement rectilignes, centrées chacune sur un axe longitudinal B1 ou B2 et se rejoignant dans une zone de raccordement 132a3. Les axes B1 et B2 forment entre eux un angle β de l'ordre de 30°. En pratique, l'angle β peut être choisi entre 15 et 45°.Note the distance, taken parallel to the plane π 1 , between, on the one hand, a plane π 2 containing the strike points P 1 and P 2 and, on the other hand, the zone Z. The comb 132 is curved , with its concavity turned towards points P 1 and P 2 . More specifically, the teeth 132a are divided into two elongated portions 132a 1 and 132a 2 , substantially rectilinear, each centered on a longitudinal axis B 1 or B 2 and meeting in a connection zone 132a 3 . The axes B 1 and B 2 form between them an angle β of the order of 30 °. In practice, the angle β can be chosen between 15 and 45 °.

Par ailleurs, les axes A21 et A22 sont inclinés par rapport au plan π1 d'un angle α de l'ordre de 75°, de telle sorte que les lances 11 et 12 peuvent être entraînées dans la succession d'orifices 133a, respectivement 136a, dans la configuration de la figure 1, alors que le peigne 132 est courbé, comme indiqué ci-dessus, et que les pattes 133 et 136 peuvent être disposées à l'extérieur des foules F1 et F2 dans la configuration de la figure 2. En pratique, l'angle α peut avoir une valeur comprise entre 50 et 90°, de préférence entre 70 et 80°.Moreover, the axes A 21 and A 22 are inclined relative to the plane π 1 by an angle α of the order of 75 °, so that the lances 11 and 12 can be driven into the succession of orifices 133a. , respectively 136a, in the configuration of the figure 1 , while the comb 132 is curved, as indicated above, and that the tabs 133 and 136 can be disposed outside the crowds F 1 and F 2 in the configuration of the figure 2 . In practice, the angle α can have a value of between 50 and 90 °, preferably between 70 and 80 °.

L'orientation des ouvertures 133b et 136b en direction des dents du métier correspond à la construction de la jonction entre les griffes et les rubans. Elle permet d'obtenir un encombrement réduit de chaque lance, formée d'une griffe et d'un ruban, dans la foule.The orientation of the openings 133b and 136b towards the teeth of the loom corresponds to the construction from the junction between claws and ribbons. It allows to obtain a small footprint of each spear, formed of a claw and a ribbon, in the crowd.

Parmi les points P'1 et P'2, le point P'1 de chaque dent 132a est le plus éloigné du plan π2 lorsque le peigne est en position arrière. On note l132 la largeur d'une dent 132a prise parallèlement au plan π1 au niveau de son point P'1. On définit un plan π3 parallèle au plan π2, c'est-à-dire perpendiculaire aux nappes de tissu N1 et N2 et passant par un point Q1 situé à une distance d' du point P'1, prise parallèlement au plan π1, égale au double de la valeur de la largeur l132.Among the points P ' 1 and P' 2 , the point P ' 1 of each tooth 132a is farthest from the plane π 2 when the comb is in the rear position. Note 132 the width of a tooth 132a taken parallel to the plane π 1 at its point P ' 1 . We define a plane π 3 parallel to the plane π 2 , that is to say perpendicular to the tissue plies N 1 and N 2 and passing through a point Q 1 located at a distance from the point P ' 1 , taken in parallel in the plane π 1 , equal to twice the value of the width l 132 .

Compte tenu de sa géométrie, le peigne 132 est situé en totalité entre les plans π2 et π3 lorsqu'il est dans sa position arrière représentée aux figures 1 et 1A. Ceci permet de minimiser la distance d entre les points de frappe P1 et P2 et la zone Z et de réduire en conséquence les courses maximales des lisses de commande des fils de poil et des fils de chaîne.Given its geometry, the comb 132 is situated entirely between the planes π 2 and π 3 when it is in its rear position shown in FIGS. figures 1 and 1A . This makes it possible to minimize the distance d between the striking points P 1 and P 2 and the zone Z and to consequently reduce the maximum strokes of the control strands of the pile yarns and the warp yarns.

En pratique, la distance d' peut être choisie avec une valeur inférieure ou égale à cinq fois la largeur l132, de préférence à trois fois cette largeur.In practice, the distance of can be chosen with a value less than or equal to five times the width 132 , preferably three times this width.

Dans tous les cas, le plan π3 s'étend au-delà de la partie convexe 132c3 du bord arrière 132c de chaque dent 132a correspondant à la zone de jonction 132a3.In all cases, the plane π 3 extends beyond the convex portion 132c 3 of the trailing edge 132c of each tooth 132a corresponding to the junction zone 132a 3 .

Lorsque le peigne est en position arrière, certains fils 4 de chaîne ou de poil de la foule supérieure F1 qui sont les seuls représentés à la figure 1A, viennent en appui contre une partie 135a du profilé 135 traitée à cet effet. De même, certains fils 4 de la chaîne ou de poil de la foule inférieure F2, qui sont également les seuls représentés à la figure 1A, viennent en appui contre un bord 131c du rail 131a traité à cet effet. La partie 135a et le bord 131c, qui sont solidaires du peigne 132, permettent de « calibrer » la foule en déterminant son encombrement en hauteur. La longueur des dents 132a peut ainsi être réduite, ce qui permet de réduire l'inertie du battant 131 et des pièces qu'il déplace.When the comb is in the rear position, some son 4 chain or hair of the upper crowd F 1 are the only ones represented in the Figure 1A , bear against a portion 135a of the section 135 treated for this purpose. Similarly, some threads 4 of the chain or pile of the lower crowd F 2 , which are also the only ones represented at Figure 1A , abut against an edge 131c of the rail 131a treated for this purpose. The portion 135a and the edge 131c, which are integral with the comb 132, used to "calibrate" the crowd by determining its overall height. The length of the teeth 132a can thus be reduced, which reduces the inertia of the wing 131 and the parts it moves.

On note l'132 la largeur d'une dent 132a dans sa partie 132a1, cette largeur étant prise perpendiculairement à l'axe B1. De même, on note l''132 la largeur, prise perpendiculairement à l'axe B2, d'une dent 132a dans sa partie 132a2. La valeur de l''132 est supérieure à celle de l'132, ce qui correspond au fait que les dents 132a sont plus larges au niveau de leur base proche du battant 131 qu'au niveau de leur extrémité la plus éloignée du battant. Ceci tient compte du fait que les dents 132a sont plus sollicitées au niveau de leur base, leur profil étant ainsi otpimisé.It is noted 132 the width of a tooth 132a in its portion 132a 1 , this width being taken perpendicular to the axis B 1 . Similarly, the width 132 , taken perpendicular to the axis B 2 , of a tooth 132a in its part 132a 2 is noted. The value of ' 132 is greater than that of 132 , which corresponds to the fact that the teeth 132a are wider at their base near the wing 131 than at their end farthest from the wing. This takes into account that the teeth 132a are more stressed at their base, their profile is thus otpimisé.

Dans le second mode de réalisation représenté à la figure 5, les éléments analogues à ceux du premier mode de réalisation portent des références identiques. Des pattes 133 et 136 permettent de guider les rubans des lances sur la largeur d'empeignage. Ce mode de réalisation diffère du précédent en ce que le peigne 132 est globalement rectiligne, les dents 132a étant définies entre un bord avant 132b et un bord arrière 132c globalement rectilignes et parallèles, sauf au niveau d'une partie 132b1 du bord 132b qui passe par les points P'1 et P'2 destinés à venir en appui contre les points de frappe du métier. Les axes centraux B1 et B2 des parties 132a1 et 132a2 des dents 132a sont parallèles. La partie 132b1 permet de définir un plan πAV qui forme un angle δ de l'ordre de 45° avec les axes B1 et B2. Comme précédemment, on définit un plan π3 perpendiculaire aux nappes de tissus avant leur séparation et passant par un point Q1 dont la distance d', prise parallèlement à un plan π1 défini comme dans le premier mode de réalisation, est égale à deux fois la largeur l132 de la dent 132 au niveau du point P'1. Cette valeur de d' est, en pratique, inférieure à cinq fois celle de l132, de préférence trois fois cette largeur.In the second embodiment shown in figure 5 elements similar to those of the first embodiment bear identical references. Legs 133 and 136 allow the lances of the lances to be guided over the lug width. This embodiment differs from the previous one in that the comb 132 is generally rectilinear, the teeth 132a being defined between a front edge 132b and a rear edge 132c generally rectilinear and parallel, except at a portion 132b 1 of the edge 132b which passes through the points P ' 1 and P' 2 intended to support the strike points of the trade. The central axes B 1 and B2 of the portions 132a 1 and 132a 2 of the teeth 132a are parallel. The part 132b 1 makes it possible to define a plane π AV which forms an angle δ of the order of 45 ° with the axes B 1 and B 2 . As before, we define a plane π 3 perpendicular to the tissue plies prior to their separation and passing through a point Q 1 whose distance of, taken parallel to a plane π 1 defined as in the first embodiment, is equal to twice the width 132 of the tooth 132 at the point P ' 1 . This value of d is, in practice, less than five times that of 132 , preferably three times that width.

Comme dans le premier mode de réalisation, le peigne 132 est, en position arrière, situé complètement entre le plan des points de frappe et le plan π3. Cette géométrie des dents du peigne 132 permet également d'obtenir une bonne compacité, ce qui limite les courses nécessaires pour les fils de chaîne et les poils.As in the first embodiment, the comb 132 is, in the rear position, located completely between the plane of the strike points and the plane π 3 . This geometry of the teeth of the comb 132 also makes it possible to obtain a good compactness, which limits the strokes necessary for the warp threads and the bristles.

Comme représenté à la figure 6, les axes B1 et B2 des parties rectilignes 132a1 et 132a2 des dents 132a d'un peigne 132 peuvent faire entre elles un angle β tel que la partie des dents 132a la plus éloignée des points de frappe est la partie 132c3 du bord arrière 132c, au niveau de la zone de jonction 132a3 entre les parties 132a1 et 132a2.As represented in figure 6 , the axes B 1 and B 2 of the straight portions 132a 1 and 132a 2 of the teeth 132a of a comb 132 may form an angle β between them so that the portion of the teeth 132a furthest from the striking points is the part 132c 3 of the trailing edge 132c, at the junction zone 132a 3 between the parts 132a 1 and 132a 2 .

Dans la position arrière représentée à la figure 6, l'ensemble du peigne 132 est situé entre les points de frappe et un plan π3 défini comme dans les deux premiers modes de réalisation.In the rear position shown at figure 6 , the whole of the comb 132 is situated between the striking points and a plane π 3 defined as in the first two embodiments.

Comme dans ces deux premiers modes de réalisation, des pattes 133 et 136 permettent de guider les rubans des lances sur la largeur d'empeignage.As in these first two embodiments, lugs 133 and 136 make it possible to guide the lances of the lances to the width of the lug.

L'invention a été décrite en référence à des figures où seules deux lances sont représentées comme équipant le métier. Une telle configuration est possible. Cependant, le métier comprend avantageusement deux lances supérieures et deux lances inférieures, les lances supérieures se rejoignant en partant des côtés des foules au centre de la foule supérieure F1, alors que les lances inférieures se rejoignent au centre de la foule inférieure F2. Le fil de trame passe alors d'une griffe à l'autre. Les pattes de guidage 133 et 136 sont alors réparties, selon la largeur d'empeignage, en deux groupes destinés à guider respectivement les lances introduites par un côté des foules et celles introduites par l'autre côté.The invention has been described with reference to figures in which only two lances are shown as equipping the loom. Such a configuration is possible. However, the craft advantageously comprises two upper lances and two lower lances, the upper lances joining from the sides of the crowds in the center of the upper crowd F 1 , while the lower lances meet at the center of the lower crowd F 2 . The weft thread then moves from one claw to another. The guide lugs 133 and 136 are then distributed, according to the width of lee, in two groups intended to guide respectively the lances introduced by one side of the crowds and those introduced by the other side.

L'invention a été représentée avec un peigne mobile en pivotement autour de l'axe Y3. Elle s'applique également aux métiers équipés de peigne à mouvement de translation sensiblement parallèle, la forme du peigne étant alors adaptée. Dans ce cas, les deux points du bord avant de chaque dent destinés à venir taper sur les points de frappe sont à la même distance de ces points de frappe. Un plan équivalent au plan π3 mentionné ci-dessus peut être défini au niveau de l'un ou l'autre de ces points particuliers des dents.The invention has been shown with a comb movable pivotally about the Y axis 3 . It also applies to looms equipped with a comb with a substantially parallel translation movement, the shape of the comb then being adapted. In this case, the two points of the front edge of each tooth intended to hit the strike points are at the same distance from these striking points. A plane equivalent to the plane π 3 mentioned above can be defined at one or other of these particular points of the teeth.

Claims (17)

  1. A device for inserting weft yams in a loom for weaving two superposed sheets, said device comprising:
    • rapiers (11, 12) provided with claws (111, 121) for entraining a weft yarn into a shed (F1, F2) ; and
    • a comb (132) movable between a rear position compatible with inserting weft yarns into the shed, and a beat-up position,
    the device being characterized:
    • in that each rapier comprises a claw (111, 121) and a flexible portion (112, 122) partially wound on a drive wheel (21, 22);
    • in that each wheel (21, 22) turns about an axis (A21' A22) that is stationary relative to the structure (50) of the loom;
    • in that said comb-forming assembly (13) is fitted with guide means (133, 136) distributed along the weaving width for guiding the flexible portion (112, 122) of each rapier (11, 12);
    • in that said guide means (133, 136) are distributed in two series (S1, S2), comprising a first series (S1) connected to said comb in the vicinity of its top portion (132a1) and a second series (S2) connected to said comb in the vicinity of its bottom portion (132a2), the first series being dedicated to guiding the flexible portion (112) of the top rapier(s) (11), while the second series is dedicated to guiding the flexible portion (122) of the bottom rapier(s) (12); and
    • in that the guide means (133, 136) are adapted to guide said flexible portions (112, 122) without them interacting with the teeth (132a) of said comb (132);
    • in that each of said series (S1, S2) of guide means is formed by a succession of tabs (133, 136) distributed along the length of said comb (132) and each defining a through orifice (133a, 136a), having at least a portion (133a1, 133a2, 136a1, 136a2) that is substantially complementary in shape to the shape of the section of the flexible portion (112, 122) of the corresponding rapier (11, 12), said through orifice (133a, 136a) having a shape adapted to guide said flexible portion (112, 122); and
    • in that at least one of said orifices (133a, 136a) is provided with an opening (133b, 136b) for passing a junction portion (113, 123) between the flexible portion (112, 122) and the claw (111, 121) of a rapier (11, 12), said opening being directed towards the teeth (132a) of said comb (132).
  2. A device according to claim 1, characterized in that, in the rear position, the comb (132) is situated completely between a plane (π2) containing the beat-up points (P1, P2) and a plane π3 perpendicular to the sheets (N1, N2) of cloth prior to their being separated (1), said perpendicular plane passing, for each tooth (132a) of said comb, through a point (Q1) situated, relative to that one point (P'1), of the points (P'1, P'2) of the front edge (132b) of said tooth that are designed to come to bear against the beat-up points (P1, P2), that is furthest from the corresponding beat-up points (P'1) by a distance (d') that is equal to five times the width (1132) of said tooth at said first point (P'1) of its front edge.
  3. A device according to one of the preceding claims, characterized in that said comb (132) is generally curved, having its concave side facing towards the beat-up points (P1, P2), the teeth (132a) of said comb each comprising two elongate portions (132a1, 132a2) centered on a respective longitudinal axis (B1, B2), said axes forming between them an angle (β) lying in the range 15° to 45°, preferably of about 30°.
  4. A device according to claims 2 and 3, characterized in that said first point (P'1) for coming to bear against a beat-up point is defined in a junction zone (132a3) between said elongate portions (132a1, 132a2), said perpendicular plane (π3) being situated beyond a convex portion (132c3) of the rear edge (132c) of each tooth, at said zone.
  5. A device according to claim 1 or claim 2, characterized in that said comb (132) is substantially rectilinear.
  6. A device according to any preceding claims, characterized in that the top portion (132a1) of said comb (132) defining the maximum size of said comb going away from the beat-up points (P1, P2) when said comb is in its rear position, extends in a direction (B1) that is generally perpendicular to the sheets (N1, N2) of cloth while said comb (132) is in the rear position, while a plane (πAV) containing the points (P'1, P'2) of the edges(132b1) of the teeth (132a) of said comb that are to come to bear against the beat-up points (P1, P2) is perpendicular to said sheets when said comb is in the beat-up position.
  7. A device according to claim 6, characterized in that said direction (B1) is inclined relative to said plane (πAV) by an angle (δ) that lies preferably in the range 15° to 45°.
  8. A device according to any preceding claims, characterized in that at least one of said guide means (133, 136) is also suitable for guiding the claw (111, 113, 121, 123) of a rapier (11, 12) in its go-and-retum movements.
  9. A device according to any preceding claims, characterized in that the axis of rotation (A21, A22) of said drive wheel (21, 22) is inclined relative to a plane (π1) parallel to the sheets (N1, N2) of cloth prior to their becoming separated (1) at an angle (α) lying in the range 50° to 90°, preferably in the range 70 to 80°, still preferably of about 75°.
  10. A device according to any preceding claims, characterized in that said orifice(s) (133a, 136a) is generally in the shape of a cross (133a1, 133a2, 133a3, 133b, 136a1, 136a2, 136a3, 136b), two of the branches (133a1, 133a2, 136a3, 136a2) of said cross being dedicated to guiding the flexible portion (112, 122) of the corresponding rapier (11, 12), while the other two branches (133a3, 133b, 136a3, 136b) of said cross, substantially perpendicular to the preceding branches and including one branch (133b, 136b) that opens out towards said comb (132), are dedicated to guiding the claw (111, 121) of the corresponding rapier (11, 12) and a portion (113, 123) of the junction between said claw and said flexible portion of said rapier.
  11. A device according to any preceding claims, characterized in that said tabs (133) forming the guide means for guiding the flexible portion (s) (112) of the top rapier(s) (11) are supported by an element (135) fitted to the top portion (132a1) of said comb (132), while the tabs (136) forming the guide means for guiding the flexible portion(s) (122) of the bottom rapier(s) (12) are supported in the vicinity of the bottom portion (132a2) of said comb.
  12. A device according to claim 11, characterized in that said tabs (133) forming the guide means for guiding the flexible portion(s) (112) of the top rapier(s) (11) are supported by a cover (135) covering all of the teeth (132a) of said comb (132).
  13. A device according to claim 12, characterized in that said cover is made of a metal bar (135) that is secured to the top ends of said teeth (132a).
  14. A device according to any preceding claims, characterized in that said comb (132) and/or a member (131) secured to said comb carry(ies) means (131a, 135) for calibrating the shed (F1, F2).
  15. A device according to one of claims 12 and 13 and according to claim 14, characterized in that said cover (135) includes a calibration portion (135a) for calibrating the top shed (F1).
  16. A device according to any preceding claims, characterized in that the teeth (132a) of said comb are wider (1"132/1'132) at their bases (132a2) than at their ends (132a1) furthest from the beater (131) for driving said comb.
  17. A loom for weaving two superposed sheets (N1, N2) and fitted with a weft yam insertion device according to any preceding claim.
EP06356062A 2005-06-08 2006-06-07 Insertion device for a two-ply loom and loom incorporating such a device Not-in-force EP1734165B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0505825A FR2886951B1 (en) 2005-06-08 2005-06-08 DEVICE FOR INSERTING FRAME WIRES FOR TWO-STAPLE-LOADED STAPLES AND A WEAVING EQUIPPED WITH SUCH A DEVICE

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EP1734165A1 EP1734165A1 (en) 2006-12-20
EP1734165B1 true EP1734165B1 (en) 2011-08-24

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EP (1) EP1734165B1 (en)
CN (1) CN1876919B (en)
AT (1) ATE521741T1 (en)
FR (1) FR2886951B1 (en)

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Publication number Priority date Publication date Assignee Title
FR2913435B1 (en) 2007-03-07 2009-12-04 Schonherr Textilmaschb Gmbh A WEAVING COMB, A WEAVING WORK COMPRISING SUCH A COMB AND METHOD OF MANUFACTURING SUCH A COMB.
CN102912530A (en) * 2012-10-31 2013-02-06 常熟市常纺纺织机械有限公司 Matching structure for rapier and rapier driving wheel of rapier loom
CN102912532B (en) * 2012-10-31 2014-03-26 常熟市常纺纺织机械有限公司 Weft insertion mechanism of rapier loom for weaving double cloth

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Publication number Priority date Publication date Assignee Title
BE795638A (en) * 1970-05-18 1973-06-18 Sparling Robert O SHUTTLE Loom
DD225863A3 (en) 1983-09-27 1985-08-07 Textimaforschung Malimo Veb Weft insertion apparatus
CN1019214B (en) 1987-11-28 1992-11-25 李秉仁 Double rapier loom and double weaving technology
DE4131745A1 (en) * 1991-09-24 1993-03-25 Ingbuero Und Rationalisierung Rapier loom - has motor driven rapiers mounted in synchronisation with the main shaft
KR19990087207A (en) * 1996-12-26 1999-12-15 야스이 쇼사꾸 Moist yarn loom leads and weaving method using them
EP1217115B1 (en) * 2000-12-22 2010-06-09 SCHÖNHERR Textilmaschinenbau GmbH Drive device for the knife carriage on a double carpet loom
CN2507874Y (en) 2001-09-23 2002-08-28 朱芳华 Wefting mechanism of rapier loom

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FR2886951B1 (en) 2007-08-31
EP1734165A1 (en) 2006-12-20
ATE521741T1 (en) 2011-09-15
CN1876919A (en) 2006-12-13
FR2886951A1 (en) 2006-12-15
CN1876919B (en) 2011-06-01

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