EP0045758B1 - Mechanical control for the shedding of warp ends of a loom and loom comprising such mechanical control - Google Patents

Mechanical control for the shedding of warp ends of a loom and loom comprising such mechanical control Download PDF

Info

Publication number
EP0045758B1
EP0045758B1 EP81900431A EP81900431A EP0045758B1 EP 0045758 B1 EP0045758 B1 EP 0045758B1 EP 81900431 A EP81900431 A EP 81900431A EP 81900431 A EP81900431 A EP 81900431A EP 0045758 B1 EP0045758 B1 EP 0045758B1
Authority
EP
European Patent Office
Prior art keywords
pulley
arm
thrust
wire
loom according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81900431A
Other languages
German (de)
French (fr)
Other versions
EP0045758A1 (en
Inventor
Tibor Arvai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Staeubli Verdol SA
Original Assignee
Verdol SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Verdol SA filed Critical Verdol SA
Publication of EP0045758A1 publication Critical patent/EP0045758A1/en
Application granted granted Critical
Publication of EP0045758B1 publication Critical patent/EP0045758B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • DTEXTILES; PAPER
    • D03WEAVING
    • D03CSHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C13/00Shedding mechanisms not otherwise provided for

Definitions

  • the present invention relates to a machine for an industrial weaving loom capable of producing shaped fabrics, as a Jacquard loom can do, in which a sheet of parallel warp threads is progressively unwound step by step, some of the warp threads chosen by programming means as a function of the colored pattern or the weave of fabric to be produced, we pass a weft thread between the raised warp threads and the non-lifted warp threads of the web, we lower the threads or some of the threads raised and the weft thread thus passed is pressed by means of a weaving comb against the other weft threads already woven, that is to say against the front of the fabric already produced, only during this time it is wound on a spool or beam as the weaving program advances step by step.
  • This type of loom for shaped fabrics is of great interest because it makes it possible to manufacture fabrics of an infinite variety both with regard to the texture or weave of the fabric and with regard to the decoration which is produced by the the only game of skilfully studied intertwining of weft threads and warp threads.
  • the whole problem of producing a pattern lies at each weaving step in the choice of those warp threads that must be raised before the passage of a specific weft thread.
  • the warp threads must be lifted by mechanisms whose bulk has never been reduced until now to match a weaving as tight as we would like, while allowing to weave a pattern over large widths (the present invention typically seeks to achieve a fabric width of 140 cm or more with 10 threads per millimeter, which has never been successful before, in order to manufacture for example upholstery fabrics panoramic decoration rather than a decoration repeated several times in a width of fabric as is currently done).
  • the present invention proposes a mechanical for a weaving loom of the type described above, that is to say comprising a system for advancing a plurality of warp threads arranged in a layer, a system for the selective lifting of selected warp threads, coupled to means for programming the choice of warp threads to be lifted, and a system for inserting weft thread between raised warp threads and non-raised warp threads, the system for lifting warp yarns comprising a plurality of lifting yarns (one for each warp yarn) which are yarns stretched substantially perpendicular to the web of warp yarns, each lifting yarn comprising a loop or mesh through which a chain so that the chain wire can be lifted by pulling on one end of the corresponding lifting wire.
  • each lifting wire is wound in the groove of a respective pulley provided with individual displacement means to rotate it by an angle corresponding to the desired lifting height of the wire whose end is fixed in the groove, these means being arranged on the side opposite to the side where the lifting wire is fixed on the pulley relative to the vertical plane passing through the axis of the latter, the pulleys being arranged in rows staggered in height above the ply of warp threads, the successive rows being shifted slightly, gradually from one floor to another.
  • the pulleys in a row have their lifting wire arrival side immediately set back from the lifting wire arrival side of the pulleys of the stored immediately above, so that there is no risk of interference of the various lifting wires between themselves and with the pulleys or their means of rotation (the lifting wire arrival sides constituting moreover the ultimate ends of each set of a pulley and its respective means of displacement).
  • the density of the warp threads is thus increased at will by increasing the number of superimposed and offset rows of adjoining pulleys.
  • a common drive means is provided for several pulleys (in practice a rotating shaft for all the pulleys of a row), and an individual coupling and decoupling means between each pulley and the drive means, suitable for authorizing or not the rotation of the respective pulley for the lifting of a warp thread, all of the coupling and decoupling means being controlled by the programming means.
  • the individual coupling and decoupling means is capable of causing a rotation of the pulley either in a first direction to a lifting position of warp thread, or in the opposite direction to a return position of warp thread, the choice being made by the programming means.
  • a bistable positioning system of the pulley is provided to maintain it in that of the angular positions where it has been placed following an actuation of the coupling means, only a new action of the latter, in a direction of movement of the pulley towards the other angular position being likely to cause a rotation of the pulley.
  • This bistable positioning system comprises at least two notches or lugs for positioning the pulley, or parts linked to the rotation of the pulley, these notches or lugs cooperating with a fixed frame to define the two stable angular positions of the pulley, and a friction means acting between the frame and the pulley or the parts related to the rotation of the pulley.
  • the coupling means comprises a thrust arm undergoing a back-and-forth movement with a possibility of oscillation in a direction transverse to the back-and-forth direction, a deflection means of the arm, actuable by the programming means being provided to orient the direction of movement of the arm, two thrust surfaces being provided, opposite one end of the thrust arm, these surfaces being linked to the rotation of the pulley in such a way that the pulley turns in one direction when the pushing arm pushes the first pushing surface and that it turns in the other direction when the arm pushes the second pushing surface.
  • the pushing surfaces can each be situated at the end of a respective link, the other end of which is linked to the pulley, this other end being situated on one side of the axis of the pulley for one of the links. and diametrically opposite for the other link.
  • the rods comprise at this other end a rack cooperating with a toothed pinion in the center of the pulley, the two racks being diametrically opposite with respect to the axis of the pulley and the pinion, and the rods being mounted to slide, substantially in the general direction back and forth of the thrust arm, relative to a fixed frame carrying the axis of the pulley.
  • the means for deflecting the thrust arm preferably comprises a blade secured to the movable armature of an electromagnet, this blade having at one end a bevelled surface and being capable of taking, depending on whether the 'electromagnet is actuated or not, two positions, at least one of which brings the bevelled surface on the path of a part secured to the thrust arm to deflect the movement of the latter accordingly.
  • the drive arm drive means preferably comprise a shaft which rotates continuously and which carries a look of the push arm a pinion with interrupted teeth meshing with a rack provided on the arm, a return spring serving to bring it back to an initial position after each movement of this arm by the drive means.
  • the rotating shaft in principle causes more several thrust arms each corresponding to a pulley and the shaft then has gears with interrupted teeth facing each thrust arm or it is grooved over a length corresponding to several thrust arms.
  • FIG. 1 a weaving loom as it currently exists, and which comprises a series of warp threads 10 arranged parallel to each other and unwinding from a spool or "beam" 12 on which they have been previously wound at the weaving operation.
  • the warp threads side by side are brought into a flat sheet 14 at the location of the weaving, that is to say at the place where the successive weft threads are to be inserted perpendicular to the warp threads and passing over certain warp threads and below certain others so as to make an intertwining and interweaving of the weft threads and the warp threads; the configuration of this interlacing optionally varies with each weft thread inserted so that a desired weaving pattern can be produced by programming this interlacing.
  • Each weft thread inserted by a shuttle 16 is pressed against the already inserted threads, that is to say against the bottom of the sheet of fabric 18 already manufactured, by a weaving comb 20 which can move back and forth. rear longitudinally.
  • the fabric 18 produced is wound on another spool or "beams" 22.
  • a mechanical 24 for lifting warp yarns is provided which is capable of lifting each of the warp yarns individually and which is coupled to non-programming means shown who control this mechanism at each weaving step to choose which of the warp threads to lift at this step.
  • the weft thread is inserted between the raised warp threads and the non-raised warp threads.
  • each warp thread passes through an eyelet or mesh 28 fixed to a respective lifting wire (or yoke) 30, this lifting wire being hung from on one side to the lifting mechanism 24 and on the other side to a counterweight, spring or other tensioning means; each lifting wire 30 can be lifted individually by the mechanism 24 to lift the warp wire passing through its respective mesh 28.
  • the wire 30 passes below the pulley in a bore formed in a fixed guide 40 which comprises a series of such bores to correctly position side by side each of the lifting wires descending from a respective pulley.
  • This guide 40 replaces the upper drip board provided to date in Jacquard type lifting mechanisms.
  • the lifting wire 30 again passes through another fixed guide 42, drilled regularly as the guide 40 to also position the lifting wires at the bottom.
  • the thread tension system is designated by the reference 44.
  • Fig. 4 schematically represents the pulley in cross section.
  • This pulley in fact comprises in the present case practically only a little more than a quarter of a pulley taking into account the height of the wire which is to be lifted, which facilitates the insertion of means for driving the pulley at the level of the 'axis of it.
  • the pulley is in fact produced by two parallel flanges 46 and 48 between which is placed, around the axis 34 of the pulley, a toothed pinion 50 whose teeth are located between the flanges.
  • the groove 36 is produced by providing a part of circular shape 52 forming a spacer between the flanges 46 and 48.
  • the racks 54 and 56 have a shape of a thin plate, toothed at their end facing the crown 50, and they are inserted between the flanges 46 and 48, which is possible due to the fact that the pulley has not been s 'extends only over a portion slightly greater than a quarter of a circle, or more precisely because the part forming a spacer 52 and groove 36 extends only over this portion of slightly more than a quarter of a circle, the flanges themselves which can extend over an entire circular surface.
  • the radius of the groove 36 is chosen taking into account the height from which it is necessary to lift each warp thread (approximately 10 to 15 centimeters), so that a rotation of the pulley over an angle of approximately a quarter of a turn causes the lifting the wire to the desired height.
  • the means for rotating the pulley (racks 54 and 56) are arranged on the side of the pulley opposite the side where the lifting wire arrives on the pulley so that practically the lifting wire is completely located end (in the longitudinal direction of the warp threads) of the mechanical lifting element of this thread, the space beyond the point of tangency between the thread 30 and the pulley being left free for the possible passage of other warp threads.
  • the only elements protruding slightly beyond the wire 30 are on the one hand the end edges of the flanges 46 and 48 delimiting the groove 36, and on the other hand the end of the guide 40.
  • fig. 5 is shown how one could assemble side by side a plurality of pulleys 32 each corresponding to the lifting of a respective wire 30. All the pulleys are mounted on a common axis 34 which is carried by a frame 58 also carrying the guide 40
  • the frame 58 is a frame for a module comprising a number of pulleys juxtaposed with their respective individual rotational drive systems. This module is mounted on a general frame of the lifting mechanism, and in this case, the frame 58 comprises two flanges 60 each pierced with two openings for the passage of two transverse guides, one of which, 62 is visible in the view front of fig. 5, and the other 64 is visible in the other figures.
  • the module carried by a frame 58 is slidably mounted on the guides 62 and 64 and can therefore move parallel to the plane of the warp threads and perpendicular to the longitudinal direction of the latter.
  • the wire 30 shown in the low position here is hooked to the pulley 32 and passes through the guide 40 placed under the pulley, in a bore located in alignment with the vertical tangent to the groove 36 of the pulley.
  • the racks 54 and 56 for driving the pulley 32 are carried at the end of respective connecting rods 66 and 68 carrying horizontal guide grooves cooperating with guide pins linked to the fixed frame 60 carrying the pulley and its actuation mechanism , so that the links 66 and 68 can move parallel to one another and substantially perpendicular to the direction of arrival of the wire 30 while being placed on the other side of the pulley with respect to this wire 30.
  • the movements of the two rods 66 and 68 are completely linked to each other by means of the toothed ring of the pulley 32, and these movements are always in phase opposition, since the racks 54 and 56 mesh together. and on the other side of the toothed crown of the pulley.
  • the links 66 and 68 are constituted by thin plates which can penetrate between the flanges of the pulley 32. Their respective ends 70 and 72 on the side opposite to the pulley and to the racks 54 and 56 constitute thrust surfaces on which can come ' apply the end 14 of a thrust arm 76 capable of moving back and forth in the direction of guidance of the links 66 and 68.
  • the push arm 76 is guided by a groove 78 and a stud 80 to be able to move in this direction, but it can also oscillate in a direction transverse to this direction, under the effect of a means of deflection of the push arm , in order to be able to orient itself either in a position where its reciprocating movement brings its end 74 opposite the end 70 of the rod 66, without touching the end 72 of the rod 68, or in a position where its reciprocating movement brings its end 74 opposite the thrust surface 72 of the link 68 without touching the end 70 of the link 66.
  • a return spring 82 acts on the push arm 74 to permanently return it to one of the two positions, for example the first, so that if the arm deflection means is not actuated, it is the rod 66 which can be pushed back, while that if the arm deflection means is activated, it will act against the spring t 82 to move) 'e :: end 74 towards the thrust surface 72 of the link 68.
  • the reciprocating movement of the thrust arm 76 is caused by a drive shaft 84 which rotates continuously and which has at its periphery an interrupted toothing 86 capable of meshing with a toothed rack 88 provided on the arm of thrust 76, the arm 76 being subjected to the action of a return spring 90 bearing on the frame 60 and tending to keep it back, spaced from the thrust surfaces 70 and 72 of the rods.
  • the drive shaft 84 is of course synchronized with the step-by-step movement of the fabric and therefore of the means for passing the weft threads so that the thrust arm 74 undergoes a complete back-and-forth movement each time no weaving, one of the movements used for the possible lifting of a warp thread, and the other for the possible return of this warp thread.
  • two toothing portions 86 are provided, and the shaft 84 therefore makes a half-turn at each weaving pitch.
  • the means for deflecting the thrust arm 76 consist of an electromagnet 92, the movable armature 94 of which carries a blade 96 having at its end 98 a bevelled surface capable of taking, depending on whether the electromagnet is actuated or not. At least one brings the bevelled surface onto the path of a part 100 secured to the thrust arm in order to deflect the movement of the latter accordingly and bring its end 74 opposite one of the links 66 and 68.
  • the bevelled surface lowers the end 74 to bring it opposite the surface 72 of the lower link 68.
  • the arm thrust can only be applied against the thrust surface 70 of the upper link 66.
  • the part 100 forms a bridge over a sufficient distance above the end 98 of the blade 100 so that once this part 100 has engaged either above or below the end 98, it remains there for the entire duration of the path of the thrust arm in the direction of the rods, which makes it possible to energize the electromagnet only during the start of a back-and-forth cycle of the arm 76, in order to reduce the consumption of electrical energy by electromagnets during weaving cycles.
  • the pushing arm 76 like the links 66 and 68, is constituted by a thin plate to have as little lateral space as possible, and preferably the pushing arm including the part 100 which forms a bridge above the blade 98, has a thickness substantially of the order of the thickness of the pulley and is arranged in a plane aligned with that of the pulley.
  • the links 66 and 68 can be held by a bistable positioning system in the last position where they have been set by the push arm 76, so that at the next weaving pitch the rods remain in the same position without being actuated again by the push arm 76 if there is no need to change the position of the warp thread considered.
  • the bistable positioning system is simply constituted by a spring 102 fixed to the frame 60 and cooperating with notches 104 and 106 provided on at least one rod and defining the two angular positions that the pulley is capable of taking, lifting position or position of warp thread return; the end of the spring 102 is capable of engaging in one of the notches 104 and 106 and then exerts on the links sufficient friction in the longitudinal direction to prevent rotation of the pulley towards its other stable angular position, for example under the tension of the lifting wire 30.
  • Fig. shows a top view of a group of actuating mechanism elements of several pulleys 32 located side by side.
  • the pulleys and their respective mechanisms are preferably arranged in compact modules comprising, for example, twenty or thirty juxtaposed pulleys, all of the mechanism elements being rejected behind the pulleys, that is to say on the side opposite the side where the lifting wires 30 arrive.
  • the frame 58 already mentioned is the frame on which the various mechanism elements and the respective pulleys are mounted. It is preferably provided that this frame 58 is not fixed relative to the assembly of the mechanical structure but that, on the contrary, the modules can be moved laterally relative to each other: a row of mounted modules is formed. on parallel bars 62 and 64 already mentioned with reference to FIG. 5 and these modules can be slid on the bars so as to bring them closer or separate them from one another according to the density of warp threads desired for weaving.
  • the pulleys 32 of a module are all mounted on a common axis 34 so that the front edges of the pulleys are aligned and that all the lifting wires 30 lie in the same plane completely at the front of the module (only the front edge of the guide 40 projecting slightly beyond the plane of the wires 30 since these wires pass through the holes in the guide 40).
  • FIGS. 8a and 8b the manner in which the means for deflecting the thrust brake 76 is shown: in FIGS. 8a and 8b, the electromagnet is not energized and its movable armature falls into a position where the beveled end 98 is not on the path of the part 100 secured to the push arm. The latter therefore moves in a first direction towards which it is biased by its spring 82; in this direction it can come to touch the end of the upper link 66 but not that of the lower link 68.
  • FIGS. c and d the electromagnet is excited and the bevelled surface 98 of the movable armature comes into the path of the part 100 and forces the arm 76 to move down during its advance movement.
  • the links 66 and 68 may not act on a ring gear of the pulley but simply on an independent toothed ring located between the links 66 and 68 to secure their respective movements in phase opposition, the lifting wire 30 being hooked to the end of one of the links after having turned around the pulley at an angle about 90 °. It will be noted that it is then necessary to provide that the groove of the pulley extends over at least a half-circumference and preferably a complete circumference, whereas in the previous case a quarter of circumference was sufficient.
  • the pulley 32 is, in this latter embodiment where it simply serves as an angle gear, a fixed roller, for example made of Teflon, on which the lifting wire 30 can slide without friction by being pulled by a rod rejected behind the roller with respect to the arrival side of wire 30.
  • a roller having a groove extending over a quarter about circumference to allow the wire 30 to arrive in this groove vergically and to be returned horizontally to be hooked to one of the rods arriving in alignment with the direction of longitudinal movement thereof, a gear still being provided for securing in opposition in phase the movements of the two rods.
  • Fig. 9 shows the overall construction of the lifting mechanism for the warp threads 10 which arrive in web from the spool 12 and which are wound after weaving on a spool 22, each warp thread being able to be lifted by a respective descending lifting thread 30 lifting mechanics.
  • the lifting mechanism comprises a general frame 110 which essentially carries two mobile assemblies 112 and 114 each carrying a series of rows of modules of several mechanical elements for individual lifting of wires.
  • the lifting wires 30 are suspended from the pulleys of the modules of each series 112 and 114 and these lifting wires pass between the two mobile assemblies 112 and 114, the direction of mobility of the assemblies 112 and 114 relative to the other being the general direction of the warp threads and this mobility being provided simply to allow the assemblies to be separated from one another and to allow the passage of a man between the assemblies for the purpose of maintenance and repair of lifting wires and mechanical components.
  • the assembly 112 has been shown in dotted lines separated from the assembly 114, and in solid lines the assembly 112 close to the assembly 114.
  • the modules of the 112 and 114 series are turned in opposite directions, so that they face each other and that the lifting wires which are suspended from them lie well between the two mobile assemblies, the mechanical elements being rejected at outside the gap between the lifting wires facing each other.
  • Each mobile assembly comprises a series of several rows of modules such as those of FIG. 7, the rows being superimposed and each row comprising several modules carried by common parallel bars 62 and 64 on which the modules can slide as has already been said.
  • the superimposed rows of modules are offset slightly progressively with respect to each other in a direction parallel to the warp threads, the offset being made in the opposite direction for the two series of sets 112 and 114.
  • This offset is made in a direction such that the pulleys of a row have their feed side of lifting yarns immediately set back from the feed side of lifting yarns of the pulleys of the row immediately above.
  • the facing pulleys are close to each other at the top of the general frame 110 and they move apart progressively when descending, the pulleys of the lower row being the most spaced from each other in the direc tion of warp threads.
  • this progressive shift which can exist both in the case where a single set 112 is provided and in the case where two sets 112 and 114 are provided, is to ensure that not only the lifting wires are located not all in the same plane but in slightly offset planes which facilitate the separation of the wires from each other, but also that the wires coming from the upper rows do not fall on parts of the lifting mechanism of the wires from the rows which are at below, the shift is always in the same direction from one row to the row immediately below.
  • the progressive shift must not be too great from one row to the next row so as not to carry out too large a spread (in the direction of the warp threads) of the lifting points of the warp threads.
  • the progressive offset must however be sufficient to avoid any interference between the lifting wires coming from a row and the lifting wires coming from the immediately lower row: in particular, an offset must be provided at least sufficient for a lifting wire 30, passing through a guide 40 which corresponds to this wire, does not come to touch the front edge of a guide 40 (or the front edges of the flanges of the pulleys) of the row immediately below the row considered.
  • each of the facing assemblies can be provided on each of the facing assemblies, each row comprising 10 sliding modules and each module comprising 28 pulleys.
  • the invention makes it possible to further increase this number as well by increasing the number of modules juxtaposed laterally as by increasing the number of superimposed rows.

Landscapes

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

Abstract

A procedure for dewatering and detaching a paper web (W) from the second former wire (13). The composite of first and second wire (12, 13) and interposed web (W) is contacted with a first cover part (33; 331) of a special suction box (30). A roll (23) guiding the second wire (13), pressing from the side of the latter deflects its run. This pressure plus centrifugal force, and the differential pressure arising from the suction box (30), dewater the web (W). The second wire (13) is separated to follow along with the guide roll (23), while web (W) and first wire (12) are acted on by the suction box (30) vacuum. The first wire (12) is then contacted with a second cover part (34; 341, 342, 343, 344; 348, 349) of the suction box (30). A twin-wire former is also disclosed, featuring within its carrying wire loop (12), on its twin-wire nan, a rotating forming roll (15; 151, 152) deflecting the composite of wires (12, 13) and web (W) as it laps a given sector ((Beta)F) of said forming roll (15; 151, 152). A special suction box (30) at the ultimate end of the wires (12, 15) has a bipartite cover its parts (33, 34) angulated against each other and preferably planar.

Description

La présente invention concerne une mécanique pour métier à tisser industriel apte à réaliser des tissus façonnés, comme peut le faire un métier de Jacquard, dans lequel on déroule progressivement pas à pas une nappe de fils de chaîne parallèles, on souléve à chaque pas certains des fils de chaîne choisis par des moyens de programmation en fonction du motif coloré ou de l'armure de tissu à réaliser, on fait passer un fil de trame entre les fils de chaîne soulevés et les fils de chaîne non soulevés de la nappe, on rabaisse les fils ou certains des fils soulevés et on plaque au moyen d'un peigne de tissage le fil de trame ainsi passé contre les autres fils de trame déjà tissés, c'est-à-dire contre le front du tissu déjà réalisé que pendant ce temps on enroule sur une bobine ou ensouple à mesure de l'avance pas à pas du programme de tissage.The present invention relates to a machine for an industrial weaving loom capable of producing shaped fabrics, as a Jacquard loom can do, in which a sheet of parallel warp threads is progressively unwound step by step, some of the warp threads chosen by programming means as a function of the colored pattern or the weave of fabric to be produced, we pass a weft thread between the raised warp threads and the non-lifted warp threads of the web, we lower the threads or some of the threads raised and the weft thread thus passed is pressed by means of a weaving comb against the other weft threads already woven, that is to say against the front of the fabric already produced, only during this time it is wound on a spool or beam as the weaving program advances step by step.

Ce type de métier à tisser pour tissus façonnés a un très grand intérêt car il permet de fabriquer des tissus d'une variété infinie tant en ce qui concerne la texture ou armure du tissu qu'en ce qui concerne le décor qui est réalisé par le seul jeu des entrecroisements savamment étudiés des fils de trame et des fils de chaîne. Tout le problème de la réalisation d'un motif réside à chaque pas de tissage dans le choix de ceux des fils de chaîne qu'il faut soulever avant le passage d'un fil de trame déterminé.This type of loom for shaped fabrics is of great interest because it makes it possible to manufacture fabrics of an infinite variety both with regard to the texture or weave of the fabric and with regard to the decoration which is produced by the the only game of skilfully studied intertwining of weft threads and warp threads. The whole problem of producing a pattern lies at each weaving step in the choice of those warp threads that must be raised before the passage of a specific weft thread.

Pour ne pas être limité en précision dans la réalisation d'un dessin, notamment d'un dessin coloré, il faut théoriquement être capable de soulever individuellement n'importe lequel ou lesquels des fils de chaîne pour le passage d'un fil de trame, et c'est d'ailleurs là le principe de base de l'invention de Jacquard. Mais dans la pratique, les tissages doivent pouvoir être très serrés, ce qui amène à avoir un espacement entre fils de chaîne tellement petit que l'on ne peut faire autrement que de soulever plusieurs fils à la fois même si l'on augmente l'espacement des fils de chaîne à l'endroit du passage du fil de trame ou si l'on réalise l'équivalent d'une augmentation d'espacement des fils de chaîne en soulevant ceux-ci par des fils de levée tendus en oblique, allant en divergeant vers le haut. En effet, les fils de chaîne doivent être soulevés par des mécanismes dont l'encombrement n'a jamais pu jusqu'à maintenant être réduit jusqu'à correspondre à un tissage aussi serré qu'on le voudrait, tout en permettant de tisser un motif sur de grandes largeurs (la présente invention cherche typiquement à réaliser une largeur de tissu de 140 cm ou plus à 10 fils au millimètre, ce qui n'a jamais été réussi auparavant, dans le but de fabriquer par exemple des tissus d'ameublement à décor panoramique plutôt qu'un décor répété plusieurs fois dans une largeur de tissu comme on le fait actuellement).In order not to be limited in precision in the realization of a drawing, in particular a colored drawing, it is theoretically necessary to be able to individually lift any or which of the warp threads for the passage of a weft thread, and this is, moreover, the basic principle of Jacquard's invention. But in practice, the weavings must be able to be very tight, which leads to having a spacing between warp threads so small that one cannot help but lift several threads at the same time even if one increases the spacing of the warp threads at the place of the passage of the weft thread or if the equivalent of an increase in spacing of the warp threads is achieved by lifting them by lifting threads stretched obliquely, going diverging upwards. Indeed, the warp threads must be lifted by mechanisms whose bulk has never been reduced until now to match a weaving as tight as we would like, while allowing to weave a pattern over large widths (the present invention typically seeks to achieve a fabric width of 140 cm or more with 10 threads per millimeter, which has never been successful before, in order to manufacture for example upholstery fabrics panoramic decoration rather than a decoration repeated several times in a width of fabric as is currently done).

On a déjà proposé antérieurement par exemple dans le document US-A-2 558 284, de réaliser des dispositifs d'actionnement individuels des fils de levée placés côte-à-côte, mais la structure de l'ensemble ne permet pas de fabriquer un tissu à texture serrée.It has already been proposed previously, for example in document US-A-2,558,284, to produce individual actuation devices for the lifting wires placed side by side, but the structure of the assembly does not make it possible to manufacture a tight texture fabric.

Il en est de même avec les documents FR-A-2 156 369 et US-A-2 136 010.The same is true with documents FR-A-2 156 369 and US-A-2 136 010.

De plus dans le premier de ces deux documents on ne retrouve pas une commande positive de soulèvement des fils de levée. Dans le document américain US-A-62 136 090 on a affaire a une pluralité de bras soulevant ou abaissant les fils de levée à partir d'une position neutre. Un bras ne peut pas être assimilé à une poulie car la distance entre l'axe géométrique du chaque fil de levée au repos et le centre d'articulation des bras correspondant change aux deux positions angulaires extrêmes de ce bras tandis qu'elle reste invariable dans le cas de la poulie.In addition, in the first of these two documents, there is no positive command for lifting the lifting wires. In the American document US-A-62 136 090 we are dealing with a plurality of arms raising or lowering the lifting wires from a neutral position. An arm cannot be assimilated to a pulley because the distance between the geometric axis of each lifting wire at rest and the center of articulation of the corresponding arms changes at the two extreme angular positions of this arm while it remains invariable in the case of the pulley.

Pour réaliser cette performance ainsi que d'autres, la présente invention propose une mécanique pour métier à tisser du type décrit précédemment, c'est-à-dire comportant un système d'avance d'une pluralité de fils de chaîne disposés en nappe, un système de levée sélective de fils de chaîne choisis, couplé à des moyens de programmation du choix des fils de chaîne à lever, et un système d'insertion de fil de trame entre fils de chaîne soulevés et fils de chaîne non soulevés, le système de levée de fils de chaîne comportant une pluralité de fils de levée (un par fil de chaîne) qui sont des fils tendus sensiblement perpendiculairement à la nappe de fils de chaîne, chaque fil de levée comportant une boucle ou maille dans laquelle passe un fil de chaîne de sorte que le fil de chaîne peut être soulevé par traction sur une extrémité du fil de levée correspondant.To achieve this performance as well as others, the present invention proposes a mechanical for a weaving loom of the type described above, that is to say comprising a system for advancing a plurality of warp threads arranged in a layer, a system for the selective lifting of selected warp threads, coupled to means for programming the choice of warp threads to be lifted, and a system for inserting weft thread between raised warp threads and non-raised warp threads, the system for lifting warp yarns comprising a plurality of lifting yarns (one for each warp yarn) which are yarns stretched substantially perpendicular to the web of warp yarns, each lifting yarn comprising a loop or mesh through which a chain so that the chain wire can be lifted by pulling on one end of the corresponding lifting wire.

Selon l'invention, chaque fil de levée s'enroule dans la gorge d'une poulie respective pourvue de moyens de déplacement individuels pour la faire tourner d'un angle correspondant à la hauteur de levée désirée du fil dont l'extrémité est fixée dans la gorge, ces moyens étant disposés du côté opposé au côté où le fil de levée est fixé sur la poulie par rapport au plan vertical passant par l'axe de cette dernière, les poulies étant disposées en rangées étagées en hauteur au-dessus de la nappe de fils de chaîne les rangées successives étant décalées légèrement, progressivement d'un étage à l'autre.According to the invention, each lifting wire is wound in the groove of a respective pulley provided with individual displacement means to rotate it by an angle corresponding to the desired lifting height of the wire whose end is fixed in the groove, these means being arranged on the side opposite to the side where the lifting wire is fixed on the pulley relative to the vertical plane passing through the axis of the latter, the pulleys being arranged in rows staggered in height above the ply of warp threads, the successive rows being shifted slightly, gradually from one floor to another.

On note que le décalage des rangées successives est réalisé dans la direction parallèle aux fils de chaîne.It is noted that the offset of the successive rows is carried out in the direction parallel to the warp threads.

Les moyens de déplacement propres à chaque fil et chaque poulie sont donc rejetés en arrière de la poulie par rapport au côté d'arrivée du fil de levée de sorte qu'ils ne provoquent pas en encombrement de mécanisme de levée au-dessus des fils de levée, à l'aplomb des mailles de levée des fils de chaîne comme c'était le cas pour les mécaniques connues jusqu'à maintenant.The means of displacement specific to each wire and each pulley are therefore rejected behind the pulley with respect to the arrival side of the lifting wire so that they do not cause congestion in the lifting mechanism above the son of lifted, in line with the lifting stitches of the warp threads, as was the case with the mechanics known up to now.

Les poulies d'une rangée ont leur côté d'arrivée de fil de levée immédiatement en retrait du côté d'arrivée de fil de levée des poulies de la rangée immédiatement au-dessus, de sorte qu'il n'y a pas de risque d'interférence des divers fils de levée entre eux et avec les poulies ou leurs moyens de mise en rotation (les côtés d'arrivée de fil de levée constituant par ailleurs les extrémités ultimes de chaque ensemble d'une poulie et de son moyen de déplacement respectif). On augmente ainsi à volonté la densité des fils de chaîne en multipliant le nombre de rangées superposées et décalées de poulies accolées.The pulleys in a row have their lifting wire arrival side immediately set back from the lifting wire arrival side of the pulleys of the stored immediately above, so that there is no risk of interference of the various lifting wires between themselves and with the pulleys or their means of rotation (the lifting wire arrival sides constituting moreover the ultimate ends of each set of a pulley and its respective means of displacement). The density of the warp threads is thus increased at will by increasing the number of superimposed and offset rows of adjoining pulleys.

Pour améliorer encore, on prévoit même la possibilité d'avoir deux séries de rangées se faisant face, c'est-à-dire qu'en vis-à-vis des rangées superposées déjà décrites on dispose une série d'autres rangées superposées et décalées mais tournées en sens inverse des premières, c'est-à-dire que les côtés d'arrivée de fil de levée des poulies de la première série font face aux côtés d'arrivée des fils de levée des poulies de l'autre série, sans aucun objet dans l'intervalle entre les deux séries (sinon les fils de levée eux-mêmes). Tout à fait en haut, les poulies en vis à vis sont proches les unes des autres. Plus on descend plus elles s'écartent progressivement puisque les décalages progressifs entre rangées sont en sens inverse pour les deux séries, et entre elles passent les fils de levée descendant des poulies des étages plus élevés.To further improve, provision is even made for having two series of rows facing each other, that is to say that opposite the superposed rows already described, there is a series of other superimposed rows and offset but turned in opposite direction to the first ones, that is to say that the lifting wire arrival sides of the pulleys of the first series face the arrival sides of the lifting wires of the pulleys of the other series , without any object in the interval between the two series (if not the lifting wires themselves). At the very top, the facing pulleys are close to each other. The further one descends the more they move apart gradually since the progressive shifts between rows are in the opposite direction for the two series, and between them pass the lifting wires descending from the pulleys of the higher stages.

Pour fixer les idées, avec deux séries de 25 rangées de 280 poulies chacune, on atteint une densité de 14 000 fils sur 140 cm avec des poulies à un pas d'environ 4,5 mm ce qui est parfaitement réalisable.To fix the ideas, with two series of 25 rows of 280 pulleys each, we reach a density of 14,000 threads on 140 cm with pulleys at a pitch of about 4.5 mm which is perfectly achievable.

Selon une autre caractéristique particulièrement avantageuse de l'invention, visant à réduire l'énergie déployée à chaque pas pour soulever tous les fils de chaîne sélectionnés, on prévoit un moyen d'entraînement commun pour plusieurs poulies (en pratique un arbre tournant pour toutes les poulies d'une rangée), et un moyen de couplage et découplage individuel entre chaque poulie et le moyen d'entraînement, apte à autoriser ou non la mise en rotation de la poulie respective en vue de la levée d'un fil de chaîne, l'ensemble des moyens de couplage et découplage étant commandé par les moyens de programmation.According to another particularly advantageous characteristic of the invention, aimed at reducing the energy deployed at each step to lift all the selected warp threads, a common drive means is provided for several pulleys (in practice a rotating shaft for all the pulleys of a row), and an individual coupling and decoupling means between each pulley and the drive means, suitable for authorizing or not the rotation of the respective pulley for the lifting of a warp thread, all of the coupling and decoupling means being controlled by the programming means.

Ainsi, seules sont entraînées les poulies des fils à soulever et on ne dépense pas d'énergie pour mouvoir une lourde mécanique commune à tous les fils de levée comme c'était le cas dans les anciens métiers Jacquard.Thus, only the pulleys of the wires to be lifted are driven and no energy is expended to move a heavy mechanism common to all the lifting wires as was the case in the old Jacquard looms.

Le moyen de couplage et découplage individuel est apte à provoquer une rotation de la poulie soit dans un premier sens jusqu'à une position de levée de fil de chaîne, soit dans le sens opposé jusqu'à une position de retour de fil de chaîne, le choix étant fait par les moyens de programmation.The individual coupling and decoupling means is capable of causing a rotation of the pulley either in a first direction to a lifting position of warp thread, or in the opposite direction to a return position of warp thread, the choice being made by the programming means.

Selon une caractéristique avantageuse, un système de positionnement bistable de la poulie est prévu pour la maintenir dans celle des positions angulaires où elle a été mise à la suite d'un actionnement du moyen de couplage, seul un nouvel actionment de ce dernier, dans un sens de déplacement de la poulie vers l'autre position angulaire étant susceptible de provoquer une rotation de la poulie.According to an advantageous characteristic, a bistable positioning system of the pulley is provided to maintain it in that of the angular positions where it has been placed following an actuation of the coupling means, only a new action of the latter, in a direction of movement of the pulley towards the other angular position being likely to cause a rotation of the pulley.

Ce système de positionnement bistable comprend au moins deux crans ou ergots de positionnement de la poulie, ou de parties liées à la rotation de la poulie, ces crans ou ergots coopérant avec un bâti fixe pour définir les deux positions angulaires stables de la poulie, et un moyen de friction agissant entre le bâti et la poulie ou les parties liées à la rotation de la poulie.This bistable positioning system comprises at least two notches or lugs for positioning the pulley, or parts linked to the rotation of the pulley, these notches or lugs cooperating with a fixed frame to define the two stable angular positions of the pulley, and a friction means acting between the frame and the pulley or the parts related to the rotation of the pulley.

Dans un mode d'exécution préférentiel, le moyen de couplage comprend un bras de poussée subissant un mouvement de va-et-vient avec une possibilité d'oscillation dans un sens transversal à la direction de va-et-vient, un moyen de déviation du bras, actionnable par les moyens de programmation étant prévu pour orienter la direction de déplacement du bras, deux surfaces de poussée étant prévues, en regard d'une extrémité du bras de poussée, ces surfaces étant liées à la rotation de la poulie d'une manière telle que la poulie tourne dans un sens lorsque le bras de poussée repousse la première surface de poussée et qu'elle tourne dans l'autre sens lorsque le bras repousse la seconde surface de poussée.In a preferred embodiment, the coupling means comprises a thrust arm undergoing a back-and-forth movement with a possibility of oscillation in a direction transverse to the back-and-forth direction, a deflection means of the arm, actuable by the programming means being provided to orient the direction of movement of the arm, two thrust surfaces being provided, opposite one end of the thrust arm, these surfaces being linked to the rotation of the pulley in such a way that the pulley turns in one direction when the pushing arm pushes the first pushing surface and that it turns in the other direction when the arm pushes the second pushing surface.

Les surfaces de poussée peuvent être situées chacune à l'extrémité d'une biellette respective dont l'autre extrémité est liée à la poulie, cette autre extrémité étant située d'un côté de l'axe de la poulie pour l'une des biellettes et diamétralement opposée pour l'autre biellette.The pushing surfaces can each be situated at the end of a respective link, the other end of which is linked to the pulley, this other end being situated on one side of the axis of the pulley for one of the links. and diametrically opposite for the other link.

Les biellettes comportent à cette autre extrémité une crémaillère coopérant avec un pignon denté au centre de la poulie, les deux crémaillères étant diamétralement opposées par rapport à l'axe de la poulie et du pignon, et les biellettes étant montées à coulissement, sensiblement dans la direction générale de va-et-vient du bras de poussée, par rapport à un bâti fixe portant l'axe de la poulie.The rods comprise at this other end a rack cooperating with a toothed pinion in the center of the pulley, the two racks being diametrically opposite with respect to the axis of the pulley and the pinion, and the rods being mounted to slide, substantially in the general direction back and forth of the thrust arm, relative to a fixed frame carrying the axis of the pulley.

En ce qui concerne le moyen de déviation du bras de poussée, il comprend de préférence une lame solidaire de l'armature mobile d'un électro- aimant, cette lame présentant à une extrémite une surface biseautée et étant susceptible de prendre, selon que l'électro-aimant est actionné ou non, deux positions dont l'une au moins amène la surface biseautée sur le trajet d'une pièce solidaire du bras de poussée pour dévier en conséquence le mouvement de ce dernier.As regards the means for deflecting the thrust arm, it preferably comprises a blade secured to the movable armature of an electromagnet, this blade having at one end a bevelled surface and being capable of taking, depending on whether the 'electromagnet is actuated or not, two positions, at least one of which brings the bevelled surface on the path of a part secured to the thrust arm to deflect the movement of the latter accordingly.

On prévoit enfin que le bras de poussée est soumis à l'action d'un ressort agissant dans la direction transversale d'oscillation du bras pour le ramener dans une position correspondant à l'une des deux directions de déplacement de son extrémité. Les moyens d'entraînement du bras de poussée comportent de préférence un arbre qui tourne en permanence et qui porte un regard du bras de poussée un pignon à denture interrompue engrenant avec une crémaillère ménagée sur le bras, un ressort de rappel servant à le ramener à une position initiale après chaque déplacement de ce bras par les moyens d'entraînement. L'arbre tournant entraîne en principe plusieurs bras de poussée correspondant chacun à une poulie et l'arbre comporte alors de pignons à denture interrompue en regard de chaque bras de poussée ou bien il est cannelé sur une longueur correspondant à plusieurs bras de poussée.Finally, provision is made for the thrust arm to be subjected to the action of a spring acting in the transverse direction of oscillation of the arm in order to return it to a position corresponding to one of the two directions of movement of its end. The drive arm drive means preferably comprise a shaft which rotates continuously and which carries a look of the push arm a pinion with interrupted teeth meshing with a rack provided on the arm, a return spring serving to bring it back to an initial position after each movement of this arm by the drive means. The rotating shaft in principle causes more several thrust arms each corresponding to a pulley and the shaft then has gears with interrupted teeth facing each thrust arm or it is grooved over a length corresponding to several thrust arms.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui suit et qui est faite en référence aux dessins annexés dans lesquels:

  • Fig. 1 représente une vue générale en perspective d'un métier à tisser.
  • Fig. 2 représente une vue schématique transversale montrant l'introduction d'un fil de trame entre les fils de chaîne.
  • Fig. représente le mécanisme d'accrochage et de levée de fil de chaîne individuel selon l'invention.
  • Fig.4 représente une coupe transversale d'une poulie du mécanisme selon l'invention.
  • Fig. 5 représente la juxtaposition en un module compact d'une série de poulies de levée de fils de chaîne.
  • Fig.6 représente en coupe longitudinale un élément de mécanisme de levée de fil de chaîne selon l'invention.
  • Fig. 7 représente une vue de dessus de plusieurs éléments de mécanisme tels que celui de la fig. 6, juxtaposés pour former un module.
  • Fig. 8 représente schématiquement le mouvement d'avance d'un bras de poussée agissant sur une poulie déterminée, avec l'action de déviation par électro-aimant de ce bras de poussée.
  • Fig. 9 représente la disposition superposée avec décalage longitudinal des éléments de mécanisme de levée de fils de chaîne.
Other characteristics and advantages of the invention will appear on reading the detailed description which follows and which is given with reference to the appended drawings in which:
  • Fig. 1 shows a general perspective view of a loom.
  • Fig. 2 shows a schematic transverse view showing the introduction of a weft thread between the warp threads.
  • Fig. represents the hooking and lifting mechanism of individual warp thread according to the invention.
  • Fig.4 shows a cross section of a pulley of the mechanism according to the invention.
  • Fig. 5 shows the juxtaposition in a compact module of a series of chain son lifting pulleys.
  • Fig.6 shows in longitudinal section an element of the warp yarn lifting mechanism according to the invention.
  • Fig. 7 shows a top view of several mechanism elements such as that of FIG. 6, juxtaposed to form a module.
  • Fig. 8 schematically represents the advance movement of a thrust arm acting on a determined pulley, with the deflection action by electromagnet of this thrust arm.
  • Fig. 9 shows the superimposed arrangement with longitudinal offset of the elements for lifting the warp yarns.

Pour faire comprendre le cadre général de l'invention, on a représenté à la fig. 1 un métier à tisser tel qu'il en existe actuellement, et qui comprend une série de fils de chaîne 10 disposés parallèlement les uns aux autres et se dévidant à partir d'une bobine ou »ensouple« 12 sur laquelle ils ont été enroulés préalablement à l'opération de tissage. Les fils de chaîne côte-à-côte sont amenés en une nappe plane 14 à l'endroit du tissage, c'est-à-dire à l'endroit où l'on va insérer les fils de trame successifs perpendiculaires aux fils de chaîne et passant au-dessus de certains fils de chaîne et au-dessous de certains autres de manière à réaliser un entrecroisement et une imbrication des fils de trame et des fils de chaîne; la configuration de cet entrecroisement varie éventuellement à chaque fil de trame inséré de sorte que l'on peut réaliser un motif de tissage désiré par la programmation de cet entrecroisement.To make the general framework of the invention understandable, FIG. 1 a weaving loom as it currently exists, and which comprises a series of warp threads 10 arranged parallel to each other and unwinding from a spool or "beam" 12 on which they have been previously wound at the weaving operation. The warp threads side by side are brought into a flat sheet 14 at the location of the weaving, that is to say at the place where the successive weft threads are to be inserted perpendicular to the warp threads and passing over certain warp threads and below certain others so as to make an intertwining and interweaving of the weft threads and the warp threads; the configuration of this interlacing optionally varies with each weft thread inserted so that a desired weaving pattern can be produced by programming this interlacing.

Chaque fil de trame inséré par une navette 16 est plaqué contre les fils déjà insérés, c'est-à-dire contre le font de la nappe de tissu 18 déjà fabriqué, par un peigne de tissage 20 qui peut se déplacer d'avant en arrière longitudinalement.Each weft thread inserted by a shuttle 16 is pressed against the already inserted threads, that is to say against the bottom of the sheet of fabric 18 already manufactured, by a weaving comb 20 which can move back and forth. rear longitudinally.

Le tissu 18 fabriqué s'enroule sur une autre bobine ou »ensouple« 22.The fabric 18 produced is wound on another spool or "beams" 22.

Pour réaliser une configuration d'entrecroisement particulière de fils de trame et de fils de chaîne, on prévoit une mécanique 24 de levée de fils de chaîne qui est capable de soulever individuellement chacun des fils de chaîne et qui est couplée à des moyens de programmation non représentés qui commandent cette mécanique à chaque pas de tissage pour choisir ceux des fils de chaîne qu'il faut soulever à ce pas. Le fil de trame est inséré entre les fils de chaîne soulevés et les fils de chaîne non soulevés.To achieve a particular crisscross configuration of weft yarns and warp yarns, a mechanical 24 for lifting warp yarns is provided which is capable of lifting each of the warp yarns individually and which is coupled to non-programming means shown who control this mechanism at each weaving step to choose which of the warp threads to lift at this step. The weft thread is inserted between the raised warp threads and the non-raised warp threads.

A la fig. 2, on voit en vue transversale une représentation de l'ouverture entre les fils de chaîne, avec un fil de chaîne 10 soulevé et un fil de chaîne 10' non soulevé, le tissu 18 déjà formé, la navette de tissage 16 qui entraîne le fil de trame 26 en se déplaçant perpendiculairement aux fils de chaîne sur un chemin de glissement 27. Chaque fil de chaîne passe dans un oeilleton ou maille 28 fixé à un fil de levée (ou arcade) respectif 30, ce fil de levée étant accroché d'un côté à la mécanique de levée 24 et de l'autre côté à un contre-poids, ressort ou autre moyen de tension; chaque fil de levée 30 peut être soulevé individuellement par la mécanique 24 pour lever le fil de chaîne passant dans sa maille 28 respective.In fig. 2, there is seen in transverse view a representation of the opening between the warp threads, with a warp thread 10 raised and a warp thread 10 'not lifted, the fabric 18 already formed, the weaving shuttle 16 which drives the weft thread 26 by moving perpendicularly to the warp threads on a sliding path 27. Each warp thread passes through an eyelet or mesh 28 fixed to a respective lifting wire (or yoke) 30, this lifting wire being hung from on one side to the lifting mechanism 24 and on the other side to a counterweight, spring or other tensioning means; each lifting wire 30 can be lifted individually by the mechanism 24 to lift the warp wire passing through its respective mesh 28.

A la fig. 3, on voit le système d'accrochage de fils de levée selon l'invention. Il comprend une poulie 32 montée à rotation autour d'un axe fixe 34. Le fil 30 passe dans une gorge 36 de la poulie et il est accroché à la poulie, par exemple grâce à un renflement 38 de retenue à son extrémité, renflement qui empêche que le fil ne s'échappe d'un perçage dans lequel il passe.In fig. 3, we see the system for hooking lifting wires according to the invention. It comprises a pulley 32 rotatably mounted about a fixed axis 34. The wire 30 passes through a groove 36 in the pulley and it is hooked to the pulley, for example by virtue of a bulge 38 retaining at its end, a bulge which prevents the wire from escaping from a hole through which it passes.

De préférence, comme on le voit sur la fig. 3, le fil 30 passe en-dessous de la poulie dans un perçage formé dans un guide fixe 40 qui comporte une série de tels perçages pour positionner correctement côte à côte chacun des fils de levée descendant d'une poulie respective. Ce guide 40 remplace la planche d'empoutage supérieure prévue jusqu'à maintenant dans les mécaniques de levée de type Jacquard. En bas du fil de levée 30, on voit la maille 28 dans laquelle passe le fil de chaîne respectif 10, et en-dessous du fil de chaîne, le fil de levée 30 passe encore dans un autre guide fixe 42, percé régulièrement comme le guide 40 pour positionner également en bas les fils de levée. Le système de tension du fil est désigné par la référence 44.Preferably, as seen in FIG. 3, the wire 30 passes below the pulley in a bore formed in a fixed guide 40 which comprises a series of such bores to correctly position side by side each of the lifting wires descending from a respective pulley. This guide 40 replaces the upper drip board provided to date in Jacquard type lifting mechanisms. At the bottom of the lifting wire 30, we see the mesh 28 through which the respective chain wire 10 passes, and below the chain wire, the lifting wire 30 again passes through another fixed guide 42, drilled regularly as the guide 40 to also position the lifting wires at the bottom. The thread tension system is designated by the reference 44.

La fig. 4 représente schématiquement la poulie en coupe transversale. Cette poulie comprend en fait dans le cas présent pratiquement seulement un peu plus d'un quart de poulie compte tenu de la hauteur de fil qui est à soulever, ce qui facilite l'insertion de moyens d'entraînement de la poulie au niveau de l'axe de celle-ci. La poulie est en fait réalisée par deux flasques parallèles 46 et 48 entre lesquels est placé, autour de l'axe 34 de la poulie, un pignon denté 50 dont la denture se situe entre les flasques. La gorge 36 est réalisée en prévoyant une partie de forme circulaire 52 formant entretoise entre les flasques 46 et 48.Fig. 4 schematically represents the pulley in cross section. This pulley in fact comprises in the present case practically only a little more than a quarter of a pulley taking into account the height of the wire which is to be lifted, which facilitates the insertion of means for driving the pulley at the level of the 'axis of it. The pulley is in fact produced by two parallel flanges 46 and 48 between which is placed, around the axis 34 of the pulley, a toothed pinion 50 whose teeth are located between the flanges. The groove 36 is produced by providing a part of circular shape 52 forming a spacer between the flanges 46 and 48.

L'entraînement en montée ou en descente de la poulie se fait grâce à la couronne dentée 50 visible également à la fig. 3, cette couronne dentée coopérant avec deux crémaillères à mouvement linéaire 54 et 56 passant chacune d'un côté de la couronne dentée 50 et travaillant en opposition de phase, c'est-à-dire que lorsque la crémaillère 54 est poussée, la crémaillère 56 est tirée et réciproquement, afin que la rotation de la poulie dans un sens s'effectue par poussée de l'une des crémaillères et que sa rotation dans l'autre sens s'effectue par poussée de l'autre crémaillère. Les crémaillères 54 et 56 ont une forme de plaque mince, dentée à leur extrémité tournée vers la couronne 50, et elles s'insèrent entre les flasques 46 et 48, ce qui est possible du fait qu'on a prévu que la poulie ne s'étend que sur une portion un peu supérieure à un quart de cercle, ou plus exactement du fait que la partie formant entretoise 52 et gorge 36 ne s'étend que sur cette portion d'un peu plus d'un quart de cercle, les flasques eux-mêmes pouvant s'étendre sur toute une surface circulaire.The drive up or down the pulley is done with the toothed crown 50 also visible in fig. 3, this ring gear cooperating with two racks with linear movement 54 and 56 each passing on one side of the ring gear 50 and working in phase opposition, that is to say that when the rack 54 is pushed, the rack 56 is pulled and vice versa, so that the rotation of the pulley in one direction is effected by pushing one of the racks and that its rotation in the other direction is effected by pushing the other rack. The racks 54 and 56 have a shape of a thin plate, toothed at their end facing the crown 50, and they are inserted between the flanges 46 and 48, which is possible due to the fact that the pulley has not been s 'extends only over a portion slightly greater than a quarter of a circle, or more precisely because the part forming a spacer 52 and groove 36 extends only over this portion of slightly more than a quarter of a circle, the flanges themselves which can extend over an entire circular surface.

Le rayon de la gorge 36 est choisi compte tenu de la hauteur dont il faut soulever chaque fil de chaîne (10 à 15 centimètres environ), de façon qu'une rotation de la poulie sur un angle d'environ un quart de tour provoque la levée du fil sur la hauteur désirée.The radius of the groove 36 is chosen taking into account the height from which it is necessary to lift each warp thread (approximately 10 to 15 centimeters), so that a rotation of the pulley over an angle of approximately a quarter of a turn causes the lifting the wire to the desired height.

Comme on peut le voir sur la fig. 3, les moyens de mise en rotation de la poulie (crémaillères 54 et 56) sont disposés du côté de la poulie opposé au côté où le fil de levée arrive sur la poulie de manière que pratiquement le fil de levée se situe complètement à l'extrémité (dans le sens longitudinal des fils de chaîne) de l'élément de mécanique de levée de ce fil, l'espace au-delà du point de tangence entre le fil 30 et la poulie étant laissée libre pour le passage éventuel d'autres fils de chaîne. Les seuls éléments faisant légèrement saillie au-delà du fil 30 sont d'une part les bords d'extrémité des flasques 46 et 48 délimitant la gorge 36, et d'autre part l'extrémité du guide 40.As can be seen in fig. 3, the means for rotating the pulley (racks 54 and 56) are arranged on the side of the pulley opposite the side where the lifting wire arrives on the pulley so that practically the lifting wire is completely located end (in the longitudinal direction of the warp threads) of the mechanical lifting element of this thread, the space beyond the point of tangency between the thread 30 and the pulley being left free for the possible passage of other warp threads. The only elements protruding slightly beyond the wire 30 are on the one hand the end edges of the flanges 46 and 48 delimiting the groove 36, and on the other hand the end of the guide 40.

A la fig. 5 on a représenté comment on pouvait assembler côte à côte une pluralité de poulies 32 correspondant chacune à la levée d'un fil respectif 30. Toutes les poulies sont montées sur un axe commun 34 qui est porté par un bâti 58 portant également le guide 40. Le bâti 58 est un bâti pour un module comprenant un certain nombre de poulies juxtaposées avec leurs systèmes d'entraînement en rotation individuels respectifs. Ce module est monté sur une charpente générale de la mécanique de levée, et en l'occurence, le bâti 58 comprend deux flasques 60 percés chacun de deux ouvertures pour le passage de deux guides transversaux dont l'un, 62 est visible sur la vue de face de la fig. 5, et l'autre 64 est visible sur les autres figures. Le module porté par un bâti 58 est monté coulissant sur les guides 62 et 64 et peut donc se déplacer parallèlement au plan des fils de chaîne et perpendiculairement à la direction longitudinale de ces derniers.In fig. 5 is shown how one could assemble side by side a plurality of pulleys 32 each corresponding to the lifting of a respective wire 30. All the pulleys are mounted on a common axis 34 which is carried by a frame 58 also carrying the guide 40 The frame 58 is a frame for a module comprising a number of pulleys juxtaposed with their respective individual rotational drive systems. This module is mounted on a general frame of the lifting mechanism, and in this case, the frame 58 comprises two flanges 60 each pierced with two openings for the passage of two transverse guides, one of which, 62 is visible in the view front of fig. 5, and the other 64 is visible in the other figures. The module carried by a frame 58 is slidably mounted on the guides 62 and 64 and can therefore move parallel to the plane of the warp threads and perpendicular to the longitudinal direction of the latter.

A la fig. 6 on a représenté plus en détail un élément individuel complet de la mécanique de traction et de descente d'un fil de levée 30.In fig. 6 a complete individual element of the traction and descent mechanics of a lifting wire 30 has been shown in more detail.

Le fil 30 représenté en position basse ici, est accroché à la poulie 32 et passe dans le guide 40 placé sous la poulie, dans un perçage situé dans l'alignement de la tangente verticale à la gorge 36 de la poulie.The wire 30 shown in the low position here, is hooked to the pulley 32 and passes through the guide 40 placed under the pulley, in a bore located in alignment with the vertical tangent to the groove 36 of the pulley.

Les crémaillères 54 et 56 d'entraînement de la poulie 32 sont portées à l'extrémité de biellettes respectives 66 et 68 portant des rainures de guidage horizontales coopérant avec des tétons de guidage liés au bâti fixe 60 portant la poulie et son mécanisme d'actionnement, de manière que les biellettes 66 et 68 puissent se déplacer parallèlement l'une à l'autre et sensiblement perpendiculairement à la direction d'arrivée du fil 30 en étant placées de l'autre côté de la poulie par rapport à ce fil 30. Les mouvements des deux biellettes 66 et 68 sont liés complètement l'un à l'autre par l'intermédiaire de la couronne dentée de la poulie 32, et ces mouvements sont toujours en opposition de phase, puisque les crémaillères 54 et 56 engrènent de part et d'autre de la couronne dentée de la poulie.The racks 54 and 56 for driving the pulley 32 are carried at the end of respective connecting rods 66 and 68 carrying horizontal guide grooves cooperating with guide pins linked to the fixed frame 60 carrying the pulley and its actuation mechanism , so that the links 66 and 68 can move parallel to one another and substantially perpendicular to the direction of arrival of the wire 30 while being placed on the other side of the pulley with respect to this wire 30. The movements of the two rods 66 and 68 are completely linked to each other by means of the toothed ring of the pulley 32, and these movements are always in phase opposition, since the racks 54 and 56 mesh together. and on the other side of the toothed crown of the pulley.

Les biellettes 66 et 68 sont constituées par des plaques minces pouvant pénétrer entre les flasques de la poulie 32. Leurs extrémités respectives 70 et 72 du côté opposé à la poulie et aux crémaillères 54 et 56 constituent des surfaces de poussée sur lesquelles peut venir s'appliquer l'extrémité 14 d'un bras de poussée 76 capable de se déplacer en va-et-vient dans la direction de guidage des biellettes 66 et 68.The links 66 and 68 are constituted by thin plates which can penetrate between the flanges of the pulley 32. Their respective ends 70 and 72 on the side opposite to the pulley and to the racks 54 and 56 constitute thrust surfaces on which can come ' apply the end 14 of a thrust arm 76 capable of moving back and forth in the direction of guidance of the links 66 and 68.

Le bras de poussée 76 est guidé par une rainure 78 et un téton 80 pour pouvoir se déplacer dans cette direction, mais il peut également osciller dans un sens transversal à cette direction, sous l'effet d'un moyen de déviation du bras de poussée, pour pouvoir s'orienter soit dans une position où son mouvement de va-et-vient amène son extrémité 74 en regard de l'extrémité 70 de la biellette 66, sans toucher l'extrémité 72 de la biellette 68, soit dans une position où son mouvement de va-et-vient amène son extrémité 74 en regard de la surface de poussée 72 de la biellette 68 sans toucher l'extrémité 70 de la biellette 66. On prévoit de préférence qu'un ressort de rappel 82 agit sur le bras de poussée 74 pour le ramener en permanence dans l'une des deux positions, par exemple la première, de sorte que si le moyen de déviation de bras n'est pas actionné, c'est la biellette 66 qui pourra être repoussée, tandis que si le moyen de déviation de bras est actionné, il agira à l'encontre du ressort 82 pour déplacer )'e::trémité 74 vers la surface de poussée 72 de la biellette 68.The push arm 76 is guided by a groove 78 and a stud 80 to be able to move in this direction, but it can also oscillate in a direction transverse to this direction, under the effect of a means of deflection of the push arm , in order to be able to orient itself either in a position where its reciprocating movement brings its end 74 opposite the end 70 of the rod 66, without touching the end 72 of the rod 68, or in a position where its reciprocating movement brings its end 74 opposite the thrust surface 72 of the link 68 without touching the end 70 of the link 66. It is preferably provided that a return spring 82 acts on the push arm 74 to permanently return it to one of the two positions, for example the first, so that if the arm deflection means is not actuated, it is the rod 66 which can be pushed back, while that if the arm deflection means is activated, it will act against the spring t 82 to move) 'e :: end 74 towards the thrust surface 72 of the link 68.

Le mouvement de va-et-vient du bras de poussée 76 est provoqué par un arbre d'entraînement 84 qui tourne en permanence et qui comporte à sa périphérie une denture interrompue 86 capable d'engrener avec une crémaillère dentée 88 prévue sur le bras de poussée 76, le bras 76 étant soumis à l'action d'un ressort de rappel 90 prenant appui sur le bâti 60 et tendant à le maintenir en arrière, écarté des surfaces de poussée 70 et 72 des biellettes.The reciprocating movement of the thrust arm 76 is caused by a drive shaft 84 which rotates continuously and which has at its periphery an interrupted toothing 86 capable of meshing with a toothed rack 88 provided on the arm of thrust 76, the arm 76 being subjected to the action of a return spring 90 bearing on the frame 60 and tending to keep it back, spaced from the thrust surfaces 70 and 72 of the rods.

Lorsque l'arbre 84 tourne, la portion de denture interrompue 86 vient à un moment engrener avec la crémaillère 88 et fait avancer le bras 76 à l'encontre du ressort 90. Dès que la portion de denture interrompue 86 se termine, le bras revient en arrière sous l'action du ressort 90, en attente d'un nouveau passage d'une portion de denture interrompue 86. Plusieurs portions de dentures peuvent être prévues sur une circonférence de l'arbre 84, pourvu que ces portions de dentures soient séparées d'un intervalle suffisant pour permettre le retour en arrière du bras de poussée 76 avant le passage de la portion de denture suivante.When the shaft 84 rotates, the portion of den interrupted ture 86 comes at a moment to mesh with the rack 88 and advances the arm 76 against the spring 90. As soon as the portion of interrupted toothing 86 ends, the arm returns back under the action of the spring 90, waiting for a new passage of a portion of interrupted toothing 86. Several portions of toothing may be provided on a circumference of the shaft 84, provided that these portions of toothing are separated by a sufficient interval to allow the return in rear of the pushing arm 76 before the passage of the next portion of teeth.

L'arbre d'entraînement 84 est bien entendu synchronisé avec le mouvement d'avance pas à pas du tissu et donc des moyens de passage des fils de trame de manière que le bras de poussée 74 subisse un va-et-vient complet à chaque pas de tissage, l'un des mouvements servant à la levée éventuelle d'un fil de chaîne, et l'autre au retour éventuel de ce fil de chaîne. Dans l'exemple représenté, deux portions de denture 86 sont prévues, et l'arbre 84 fait donc un demitour à chaque pas de tissage.The drive shaft 84 is of course synchronized with the step-by-step movement of the fabric and therefore of the means for passing the weft threads so that the thrust arm 74 undergoes a complete back-and-forth movement each time no weaving, one of the movements used for the possible lifting of a warp thread, and the other for the possible return of this warp thread. In the example shown, two toothing portions 86 are provided, and the shaft 84 therefore makes a half-turn at each weaving pitch.

Les moyens de déviation du bras de poussée 76 sont constitués par un électro-aimant 92 dont l'armature mobile 94 porte une lame 96 présentant à son extrémité 98 une surface biseautée susceptible de prendre, selon que l'électroaimant est actionné ou non. L'une au moins amène la surface biseautée sur le trajet d'une pièce 100 solidaire du bras de poussée pour dévier en conséquence le mouvement de ce dernier et amener son extrémité 74 en regard de l'une des biellettes 66 et 68. Ici, lorsque l'électro-aimant est excité, la surface biseautée vient baisser l'extrémité 74 pour l'amener en regard de la surface 72 de la biellette inférieure 68. En l'absence d'excitation de l'électro-aimant, le bras de poussée ne peut que venir s'appliquer contre la surface de poussée 70 de la biellette supérieure 66.The means for deflecting the thrust arm 76 consist of an electromagnet 92, the movable armature 94 of which carries a blade 96 having at its end 98 a bevelled surface capable of taking, depending on whether the electromagnet is actuated or not. At least one brings the bevelled surface onto the path of a part 100 secured to the thrust arm in order to deflect the movement of the latter accordingly and bring its end 74 opposite one of the links 66 and 68. Here, when the electromagnet is excited, the bevelled surface lowers the end 74 to bring it opposite the surface 72 of the lower link 68. In the absence of excitation of the electromagnet, the arm thrust can only be applied against the thrust surface 70 of the upper link 66.

La pièce 100 forme un pont sur une distance suffisante au-dessus de l'extrémité 98 de la lame 100 de sorte qu'une fois que cette pièce 100 s'est engagée soit au-dessus soit au-dessous de l'extrémité 98, elle y reste pendant toute la durée du trajet du bras de poussée en direction des biellettes, ce qui permet de n'exciter l'électro- aimant que pendant le début d'un cycle de va-et-vient du bras 76, afin de réduire la consommation d'énergie électrique par les électroaimant au cours des cycles de tissage.The part 100 forms a bridge over a sufficient distance above the end 98 of the blade 100 so that once this part 100 has engaged either above or below the end 98, it remains there for the entire duration of the path of the thrust arm in the direction of the rods, which makes it possible to energize the electromagnet only during the start of a back-and-forth cycle of the arm 76, in order to reduce the consumption of electrical energy by electromagnets during weaving cycles.

Le bras de poussée 76, comme les biellettes 66 et 68, est constitué par une plaque d'épaisseur faible pour avoir un encombrement latéral aussi petit que possible, et de préférence, le bras de poussée y compris la partie 100 qui forme pont au-dessus de la lame 98, a une épaisseur sensiblement de l'ordre de l'épaisseur de la poulie et est disposé dans un plan aligné avec celui de la poulie.The pushing arm 76, like the links 66 and 68, is constituted by a thin plate to have as little lateral space as possible, and preferably the pushing arm including the part 100 which forms a bridge above the blade 98, has a thickness substantially of the order of the thickness of the pulley and is arranged in a plane aligned with that of the pulley.

Le couplage du bras de poussée 76 avec l'une ou l'autre des biellettes se fait à volonté grâce à l'électro-aimant 92 qui est bien entendu commandé par les moyens de programmation du métier à tisser.The coupling of the pushing arm 76 with one or the other of the links is done at will thanks to the electromagnet 92 which is of course controlled by the programming means of the loom.

Etant donné que dans certains cas, on souhaite pouvoir garder un fil de chaîne levé pendant plusieurs pas de tissage consécutifs, on prévoit selon l'invention que les biellettes 66 et 68 peuvent être maintenues par un système de positionnement bistable dans la dernière position où elles ont été mises par le bras de poussée 76, de façon qu'au pas de tissage suivant les biellettes restent dans la même position sans être actionnées à nouveau par le bras de poussée 76 s'il n'y a pas lieu de modifier la position du fil de chaîne considéré.Given that in certain cases, it is desired to be able to keep a warp yarn lifted for several consecutive weaving steps, it is provided according to the invention that the links 66 and 68 can be held by a bistable positioning system in the last position where they have been set by the push arm 76, so that at the next weaving pitch the rods remain in the same position without being actuated again by the push arm 76 if there is no need to change the position of the warp thread considered.

Le système de positionnement bistable est simplement constitué par un ressort 102 fixé au bâti 60 et coopérant avec des crans 104 et 106 prévus sur au moins une biellette et définissant les deux positions angulaires que la poulie est susceptible de prendre, position de levée ou position de retour de fil de chaîne; l'extrémité du ressort 102 est susceptible de s'engager dans l'un des crans 104 et 106 et exerce alors sur les biellettes une friction suffisante dans le sens longitudinal pour empêcher la rotation de la poulie vers son autre position angulaire stable, par exemple sous l'effet de la tension du fil de levée 30.The bistable positioning system is simply constituted by a spring 102 fixed to the frame 60 and cooperating with notches 104 and 106 provided on at least one rod and defining the two angular positions that the pulley is capable of taking, lifting position or position of warp thread return; the end of the spring 102 is capable of engaging in one of the notches 104 and 106 and then exerts on the links sufficient friction in the longitudinal direction to prevent rotation of the pulley towards its other stable angular position, for example under the tension of the lifting wire 30.

La fig. représente une vue de dessus d'un groupe d'éléments de mécanisme d'actionnement de plusieurs poulies 32 situées côte à côte. On dispose en effet de préférence les poulies et leurs mécanismes respectifs en modules compacts comportant par exemple une vingtaine ou une trentaine de poulies juxtaposées, tous les éléments de mécanisme étant rejetés en arrière des poulies, c'est-à-dire du côté opposé au côté où arrivent les fils de levée 30.Fig. shows a top view of a group of actuating mechanism elements of several pulleys 32 located side by side. In fact, the pulleys and their respective mechanisms are preferably arranged in compact modules comprising, for example, twenty or thirty juxtaposed pulleys, all of the mechanism elements being rejected behind the pulleys, that is to say on the side opposite the side where the lifting wires 30 arrive.

Le bâti 58 déjà mentionné est le bâti sur lequel sont montés les divers éléments de mécanisme et les poulies respectives. On prévoit de préférence que ce bâti 58 n'est pas fixe par rapport à l'ensemble de la charpente de la mécanique mais qu'au contraire les modules peuvent être déplacés latéralement les uns par rapport aux autres: on constitue une rangée de modules montés sur des barres parallèles 62 et 64 déjà mentionnées en référence à la fig. 5 et on peut faire coulisser ces modules sur les barres de manière à les rapprocher ou les écarter les uns des autres selon la densité de fils de chaîne désirée pour le tissage.The frame 58 already mentioned is the frame on which the various mechanism elements and the respective pulleys are mounted. It is preferably provided that this frame 58 is not fixed relative to the assembly of the mechanical structure but that, on the contrary, the modules can be moved laterally relative to each other: a row of mounted modules is formed. on parallel bars 62 and 64 already mentioned with reference to FIG. 5 and these modules can be slid on the bars so as to bring them closer or separate them from one another according to the density of warp threads desired for weaving.

Comme on peut le voir sur la fig. 7, les poulies 32 d'un module sont toutes montées sur un axe commun 34 de sorte que les bords antérieurs des poulies sont aligné et que tous les fils de levée 30 se situent dans un même plan tout à fait à l'avant du module (seul le bord avant du guide 40 débordant légèrement au-delà du plan des fils 30 puisque ces fils passent dans les perçages du guide 40).As can be seen in fig. 7, the pulleys 32 of a module are all mounted on a common axis 34 so that the front edges of the pulleys are aligned and that all the lifting wires 30 lie in the same plane completely at the front of the module (only the front edge of the guide 40 projecting slightly beyond the plane of the wires 30 since these wires pass through the holes in the guide 40).

A la fig. 8 on a représenté pour la clarté de la description la manière selon laquelle agit le moyen de déviation du bra de poussée 76: aux fig. 8a et 8b, l'électro-aimant n'est pas excité et son armature mobile tombe dans une position où l'extrémité biseautée 98 n'est pas sur le trajet de la partie 100 solidaire du bras de poussée. Celui-ci se déplace donc dans une première direction vers laquelle il est sollicité par son ressort 82; dans cette direction il peut venir toucher l'extrémité de la biellette supérieure 66 mais non celle de la biellette inférieure 68. Aux fig. c et d, l'électro-aimant est excité et la surface biseautée 98 de l'armature mobile vient sur le trajet de la partie 100 et force le bras 76 à se déplacer vers le bas au cours de son mouvement d'avance. Dans cette nouvelle position, l'extrémité du bras de poussée 76 peut venir appuyer sur la biellette 68 mais non sur la biellette 66. Il faut comprendre de toute façon que le bras de poussée ne pousse sur une biellette 66 ou 68 que si cette biellette n'a pas déjà été repoussée, au demi-pas de tissage précédent, par le bras de poussée. On a ainsi décrit en référence aux figures précédentes un mode d'exécution de mécanisme de levée de fils de chaîne dans lequel chaque fil de levée 30 est accroché à une poulie qui est entraînée en rotation par des biellettes et des crémaillères agissant sur une couronne dentée de cette poulie. On peut comprendre qu'il est possible également de ne pas accrocher directement le fil de levée 30 à la poulie mais de le faire passer sur la gorge de la poulie pour le renvoyer sur une direction en arrière du côté d'arrivée du fil 30 sur la poulie, le fil étant ensuite accroché à un mécanisme de traction individuelle, la poulie ne servant que de renvoi de direction pour le fil 30: par exemple, les biellettes 66 et 68 peuvent ne pas agir sur une couronne dentée de la poulie mais simplement sur une couronne dentée indépendante située entre les biellettes 66 et 68 pour solidariser en opposition de phase leurs mouvements respectifs, le fil de levée 30 étant accroché à l'extrémité de l'une des biellettes après avoir tourné autour de la poulie d'un angle d'environ 90°. On notera qu'il est alors nécessaire de prévoir que la gorge de la poulie s'étende sur au moins une demi-circonférence et de préférence une circonférence complète, alors que dans le cas précédent un quart de circonférence suffisait.In fig. 8 for the clarity of the description, the manner in which the means for deflecting the thrust brake 76 is shown: in FIGS. 8a and 8b, the electromagnet is not energized and its movable armature falls into a position where the beveled end 98 is not on the path of the part 100 secured to the push arm. The latter therefore moves in a first direction towards which it is biased by its spring 82; in this direction it can come to touch the end of the upper link 66 but not that of the lower link 68. In FIGS. c and d, the electromagnet is excited and the bevelled surface 98 of the movable armature comes into the path of the part 100 and forces the arm 76 to move down during its advance movement. In this new position, the end of the thrust arm 76 can come to press on the link 68 but not on the link 66. It must be understood anyway that the push arm only pushes on a link 66 or 68 if this link has not already been pushed back, in the previous half weaving step, by the push arm. There has thus been described with reference to the preceding figures an embodiment of a chain son lifting mechanism in which each lifting wire 30 is hooked to a pulley which is rotated by rods and racks acting on a ring gear of this pulley. It can be understood that it is also possible not to directly hook the lifting wire 30 to the pulley but to pass it over the groove of the pulley to return it in a direction behind the arrival side of the wire 30 on the pulley, the wire then being hooked to an individual traction mechanism, the pulley only serving as a steering gear for the wire 30: for example, the links 66 and 68 may not act on a ring gear of the pulley but simply on an independent toothed ring located between the links 66 and 68 to secure their respective movements in phase opposition, the lifting wire 30 being hooked to the end of one of the links after having turned around the pulley at an angle about 90 °. It will be noted that it is then necessary to provide that the groove of the pulley extends over at least a half-circumference and preferably a complete circumference, whereas in the previous case a quarter of circumference was sufficient.

On peut à la limite prévoir, compte tenu des matériaux à faible coefficient de friction existant actuellement que la poulie 32 est, dans ce dernier mode de réalisation où elle sert simplement de renvoi d'angle, un galet fixe par exemple en téflon sur lequel le fil de levée 30 peut glisser sans frottement en étant tiré par une biellette rejetée en arrière du galet par rapport au côté d'arrivée du fil 30. Dans ce dernier cas, il suffit de prévoir un galet ayant une gorge s'étendant sur un quart de circonférence environ pour permettre au fil 30 d'arriver dans cette gorge vergicale- ment et d'être renvoyé horizontalement pour être accroché à l'une des biellettes en arrivant dans l'alignement de la direction de déplacement longitudinal de celle-ci, un engrenage étant encore prévu pour assurer une solidarisation en opposition de phase des mouvements des deux biellettes.It is possible, at the limit, to provide, given the materials with a low coefficient of friction currently existing, that the pulley 32 is, in this latter embodiment where it simply serves as an angle gear, a fixed roller, for example made of Teflon, on which the lifting wire 30 can slide without friction by being pulled by a rod rejected behind the roller with respect to the arrival side of wire 30. In the latter case, it suffices to provide a roller having a groove extending over a quarter about circumference to allow the wire 30 to arrive in this groove vergically and to be returned horizontally to be hooked to one of the rods arriving in alignment with the direction of longitudinal movement thereof, a gear still being provided for securing in opposition in phase the movements of the two rods.

L'utilisation de poulies ou galets de renvoi de direction de traction des fils de levée dans une direction sensiblement perpendiculaire à la direction d'arrivée de ces fils permet de disposer un très grand nombre de mécanismes individuels de levée associés chacun à une poulie respective, sans interférence entre les multiples fils de levée et ces éléments de mécanisme, ceci grâce à l'agencement qui va maintenant être décrit en référence à la fig. 9.The use of pulleys or rollers for returning the traction direction of the lifting wires in a direction substantially perpendicular to the direction of arrival of these wires makes it possible to have a very large number of individual lifting mechanisms each associated with a respective pulley, without interference between the multiple lifting wires and these mechanism elements, this thanks to the arrangement which will now be described with reference to FIG. 9.

La fig. 9 représente la construction globale de la mécanique de levée des fils de chaîne 10 qui arrivent en nappe depuis la bobine 12 et qui s'enroulent après tissage sur une bobine 22, chaque fil de chaîne pouvant être levé par un fil de levée respectif 30 descendant de la mécanique de levée. La mécanique de levée comprend une charpente générale 110 qui porte essentiellement deux ensembles mobiles 112 et 114 portant chacun une série de rangées de modules de plusieurs éléments de mécaniques de levée individuelle de fils. Les fils de levée 30 sont suspendus à partir des poulies des modules de chaque série 112 et 114 et ces fils de levée passent entre les deux ensembles mobiles 112 et 114, la direction de mobilité des ensembles 112 et 114 l'un par rapport à l'autre étant la direction générale des fils de chaîne et cette mobilité étant prévue simplement pour permettre d'écarter les ensembles l'un par rapport à l'autre et permettre le passage d'un homme entre les ensembles en vue de l'entretien et de la réparation des fils de levée et des éléments de la mécanique.Fig. 9 shows the overall construction of the lifting mechanism for the warp threads 10 which arrive in web from the spool 12 and which are wound after weaving on a spool 22, each warp thread being able to be lifted by a respective descending lifting thread 30 lifting mechanics. The lifting mechanism comprises a general frame 110 which essentially carries two mobile assemblies 112 and 114 each carrying a series of rows of modules of several mechanical elements for individual lifting of wires. The lifting wires 30 are suspended from the pulleys of the modules of each series 112 and 114 and these lifting wires pass between the two mobile assemblies 112 and 114, the direction of mobility of the assemblies 112 and 114 relative to the other being the general direction of the warp threads and this mobility being provided simply to allow the assemblies to be separated from one another and to allow the passage of a man between the assemblies for the purpose of maintenance and repair of lifting wires and mechanical components.

Sur la fig. 9, on a représenté en pointillés l'ensemble 112 écarté de l'ensemble 114, et en traits pleins l'ensemble 112 rapproché de l'ensemble 114. On peut voir également sur la fig. 9 que les modules des séries 112 et 114 sont tournés en sens opposé, de sorte qu'ils se font face et que les fils de levée qui sont suspendus à eux se situent bien entre les deux ensembles mobiles, les éléments de mécanique étant rejetés à l'extérieur de l'intervalle entre les fils de levée qui se font face.In fig. 9, the assembly 112 has been shown in dotted lines separated from the assembly 114, and in solid lines the assembly 112 close to the assembly 114. We can also see in FIG. 9 that the modules of the 112 and 114 series are turned in opposite directions, so that they face each other and that the lifting wires which are suspended from them lie well between the two mobile assemblies, the mechanical elements being rejected at outside the gap between the lifting wires facing each other.

Chaque ensemble mobile comprend une série de plusieurs rangées de modules tels que ceux de la fig. 7, les rangées étant superposées et chaque rangée comprenant plusieurs modules portés par des barres parallèles communes 62 et 64 sur lesquelles les modules peuvent coulisser comme on l'a déjà dit.Each mobile assembly comprises a series of several rows of modules such as those of FIG. 7, the rows being superimposed and each row comprising several modules carried by common parallel bars 62 and 64 on which the modules can slide as has already been said.

Les rangées superposées de modules sont décalées légèrement progressivement les unes par rapport aux autres dans une direction parallèle aux fils de chaîne, le décalage étant fait d'ailleurs en sens inverse pour les deux séries des ensembles 112 et 114. Ce décalage est fait dans un sens tel que les poulies d'une rangée ont leur côté d'arrivée de fils de levée immédiatement en retrait du côté d'arrivée de fils de levée des poulies de la rangée immédiatement au-dessus. Ainsi, les poulies en vis-à-vis sont proches les unes des autres en haut de la charpente générale 110 et elles s'écartent progressivement en descendant, les poulies de la rangée inférieure étant les plus écartées les unes des autres dans la direction des fils de chaîne.The superimposed rows of modules are offset slightly progressively with respect to each other in a direction parallel to the warp threads, the offset being made in the opposite direction for the two series of sets 112 and 114. This offset is made in a direction such that the pulleys of a row have their feed side of lifting yarns immediately set back from the feed side of lifting yarns of the pulleys of the row immediately above. Thus, the facing pulleys are close to each other at the top of the general frame 110 and they move apart progressively when descending, the pulleys of the lower row being the most spaced from each other in the direc tion of warp threads.

Le but de ce décalage progressif, qui peut exister aussi bien dans le cas où un seul ensemble 112 est prévu que dans le cas où deux ensembles 112 et 114 sont prévus, est de faire en sorte que non seulement les fils de levée ne se situent pas tous dans un même plan mais dans des plans légèrement décalés qui facilitent la séparation des fils les uns des autres, mais aussi que les fils venant des rangées supérieures ne tombent pas sur des parties de la mécanique de levée des fils des rangées qui sont au-dessous, le décalage se faisant toujours dans le même sens d'une rangée à la rangée immédiatement au-dessous.The purpose of this progressive shift, which can exist both in the case where a single set 112 is provided and in the case where two sets 112 and 114 are provided, is to ensure that not only the lifting wires are located not all in the same plane but in slightly offset planes which facilitate the separation of the wires from each other, but also that the wires coming from the upper rows do not fall on parts of the lifting mechanism of the wires from the rows which are at below, the shift is always in the same direction from one row to the row immediately below.

Le décalage progressif ne doit pas être trop important d'une rangée à la rangée suivante pour ne pas réaliser un trop grand étalement (dans la direction des fils de chaîne) des points de levée des fils de chaîne. Le décalage progressif doit cependant être suffisant pour éviter toute interférence entre les fils de levée provenant d'une rangée et les fils de levée provenant de la rangée immédiatement inférieure: il faut en particulier prévoir un décalage au moins suffisant pour qu'un fil de levée 30, passant dans un guide 40 qui correspond à ce fil, ne vienne pas toucher le bord antérieur d'un guide 40 (ou les bords antérieurs des flasques des poulies) de la rangée immédiatement en-dessous de la rangée considérée.The progressive shift must not be too great from one row to the next row so as not to carry out too large a spread (in the direction of the warp threads) of the lifting points of the warp threads. The progressive offset must however be sufficient to avoid any interference between the lifting wires coming from a row and the lifting wires coming from the immediately lower row: in particular, an offset must be provided at least sufficient for a lifting wire 30, passing through a guide 40 which corresponds to this wire, does not come to touch the front edge of a guide 40 (or the front edges of the flanges of the pulleys) of the row immediately below the row considered.

A titre d'exemple, on peut prévoir 25 rangées de poulies sur chacun des ensembles en vis-à-vis, chaque rangée comprenant 10 modules coulissant et chaque module comprenant 28 poulies. Cependant, l'invention permet d'augmenter encore ce nombre aussi bien en augmentant le nombre des modules juxtaposés latéralement qu'en augmentant le nombre des rangées superposées.For example, 25 rows of pulleys can be provided on each of the facing assemblies, each row comprising 10 sliding modules and each module comprising 28 pulleys. However, the invention makes it possible to further increase this number as well by increasing the number of modules juxtaposed laterally as by increasing the number of superimposed rows.

Il doit d'ailleurs être entendu que la description qui précède n'a été donnée qu'à titre d'exemple et qu'elle ne limite nullement le domaine de l'invention dont on ne sortirait pas en remplaçant les détails d'exécution décrits par tous autres équivalents dans le cadre défini par les revendications.It should moreover be understood that the above description has been given only by way of example and that it in no way limits the field of the invention from which one would not depart by replacing the execution details described by any other equivalent within the framework defined by the claims.

Claims (16)

1. Industrial loom comprising a system for advancing a plurality of warp yarns (10) disposed in a layer (14), a mechanism (24) for the selective raising of the warp yarns chosen, which mechanism is linked to means for programming the choice of the warp yarns to be raised, and a system of insertion (16) of weft yarn between the raised warp yarns and the layer of unraised warp yarns, the mechanism for raising the warp yarns having a plurality of lift threads tensioned on both sides of the sheet of warp yarns and each being provided with a loop (28) into which passes a respective warp yarn (10), characterized in that each lift thread (30) is wrapped in the slot (36) of a respective pulley (32) provided with individual means of displacement (54, 56) to turn said pulley through an angle corresponding to the desired height of raising of the thread (30) whose extremity is secured in the slot (36), these means (54, 56) being situated on the side opposite the side where the lift thread (30) is secured to the pulley (32) relative to the vertical plane passing through the axis of the latter, and in that the pulleys (32) are arranged in tiers staggered in height above the layer (14) of warp yarns (10), the seccessive rows being slightly staggered progressively from one level to the next.
2. Loom according to claim 1, characterized in that the staggering of the successive rows is effected in a direction parallel to the warp yarns (10).
3. Loom according to claim 2, characterized in that two series of rows disposed opposite each other are provided, the pulleys (32) and their means of displacement (54, 56) being turned in opposite directions for the two series, the delivery sides of the lift threads (30) of the pulleys (32) of the first series being opposite the delivery sides of the lift threads of those of the second series, and the progressive staggering of the rows of pulleys in the direction of the warp yarns (10) being in opposite directions for the respective rows of the two series.
4. Loom according to one of claims 1 to 3, characterized in that a drive means (34) is provided which is common to several pulleys (32) and means (76-92) are provided of individual coupling and decoupling between each pulley and the drive means, which latter means are capable of permitting or not permitting the rotation of the respective pulley for the purpose of raising a warp yarn (10), the whole of the individual means of coupling and decoupling being controlled by the programming means.
5. Loom according to claim 4, characterized in that the means (92) of individual coupling and decoupling is able to couple the means of displacing (54, 56) to the corresponding pulley (32) either by causing a rotation of the pulley (32) in a first direction until a raised position of the thread (30) is reached or by causing a rotation of the pulley in a second direction until a return position of the warp yarn (10) is reached, the choice being made by the programming means.
6. Loom according to one of claims 4 and 5, characterized in that a system of bistable positioning (102) of the pulley (32) is provided to retain the pulley in one of the two angular positions in which it has been placed as a result of the action of the means of coupling (92), only one new action of the means of coupling (92), in a direction of displacement of the pulley towards the other angular position, being capable of causing a rotation of the pulley (32).
7. Loom according to claim 6, characterized in that the system of bistable positioning (102) comprises at least two notches (104, 106) or lugs for positioning of the pulley (32) or parts (54, 56) linked to the rotation of the pulley (32), these notches or lugs co-operating with a fixed frame to define the two stable angular positions of the pulley, and a friction means (102) acting between the frame (58) and the pulley (32) or the parts (54, 56) linked to the rotation of the pulley (32).
8. Loom according to one of claims4 to 7, characterized in that the means (76-92) of coupling comprise a thrust arm (76) which undergoes a reciprocating movement with the possiblility of oscillation in a direction transverse to the reciprocating direction, a means (92) of deflecting the arm, which means can be activated by the programming means, being provided to set the direction of displacement of the arm, two thrust surfaces (72-70) being provided opposite one extremity (74) of the thrust arm (76), these surfaces being linked to the rotation of the pulley (32) in such a manner that the pulley turns in one direction when the thrust arm (76) pushes the first thrust surface (72) and that it turns in the other direction when the thrust arm (76) pushes the second thrust surface (70).
9. Loom according to claim 8, characterized in that the thrust surfaces (72, 70) are each situated at the end of a respective link rod (56, 54) whose other extremity is connected to the pulley, this other extremity being situated at one side of the axis (34) of the pulley (32) for one of the link rods and being situated diametrically opposite for the other.
10. Loom according to claim 9, characterized in that the link rods (54,56) have, at the said other extremity, a toothed rack working in conjunction with a toothed pinion (50) at the centre of the pulley (32), the two toothed racks being diametrically opposed relative to the axis (34) of the pulley (32) and of the pinion (50) and the link rods being slidably mounted effectively in the general direction of reciprocation of the thrust arm (76) relative to a fixed frame (58) which carries the axis (34) of the pulley (32).
11. Loom according to one of claims 8 to 10, characterized in that the means of deflection (92) comprises a plate (96) integral with the mobile armature (94) of an electro-magnet (92), this plate (96) presenting a bevelled surface at one extremity and being capable of taking up, depending upon whether or not the electro-magnet is activated, two positions, at least one of which leads the vebelled face along the path of a part (100) integral with the thrust arm (76) so as to deflect the movement of the latter as a consequence.
12. Loom according to claim 11, characterized in that the thrust arm (76) is subject to the action of a spring (82) acting in the transverse direction of oscillation of the arm (76) to take it into a position corresponding to one of the two directions of displacement of its extremity.
13. Loom according to one of claims 11 and 12, characterized in that the electro-magnet (92) is excited only during a part of a cycle of reciprocation of the thrust arm (76), its activation being interrupted after the thrust arm has been definitively engaged in the direction corresponding to this activation.
14. Loom according to one of claims 8 to 13, characterized in that the thrust arm (76) has a toothed rack (88), that the drive means comprises a permanently turning shaft (84), this shaft having opposite the toothed rack (88) of the thrust arm (76) a pinion (84) with interrupted toothing (86), and that a means (90) is provided of returning the arm (76) to an initial position after each deflection of the arm by the drive means.
15. Loom according to claim 14, characterized in that the means of returning the thrust arm is a spring (90) acting in the longitudinal direction of the oscillation of the arm (76), this spring acting when the drive shaft (84) arrives in a position where the toothed rack (88) of the arm (76) is facing a zone of interruption of the toothing of the pinion (84) of the shaft.
16. Loom according to one of claims 8 to 15, characterized in that each each pulley (32) comprises two adjacent lateral edges (46, 48), and that the thrust arm (76) consists of a plate of a thickness significantly less than the thickness of the pulley and disposed in a plane situated between the lateral edges of the pulley.
EP81900431A 1980-02-18 1981-02-17 Mechanical control for the shedding of warp ends of a loom and loom comprising such mechanical control Expired EP0045758B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MC801432A MC1319A1 (en) 1980-02-18 1980-02-18 CONTROL SYSTEM FOR LIFTING CHAIN YARNS OF A WEAVING MATERIAL
MC1432 1980-02-18

Publications (2)

Publication Number Publication Date
EP0045758A1 EP0045758A1 (en) 1982-02-17
EP0045758B1 true EP0045758B1 (en) 1984-06-27

Family

ID=19738001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81900431A Expired EP0045758B1 (en) 1980-02-18 1981-02-17 Mechanical control for the shedding of warp ends of a loom and loom comprising such mechanical control

Country Status (8)

Country Link
US (1) US4440196A (en)
EP (1) EP0045758B1 (en)
JP (1) JPS57500112A (en)
BE (1) BE887551A (en)
DE (1) DE3164357D1 (en)
IT (1) IT1135517B (en)
MC (1) MC1319A1 (en)
WO (1) WO1981002312A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0385483U (en) * 1989-12-19 1991-08-29
EP0668381B1 (en) * 1994-01-26 1997-06-18 Danilo Jaksic Jacquard machine
FR2772794B1 (en) * 1997-12-24 2000-01-28 Staubli Sa Ets JACQUARD WEAPON MECHANICS AND WEAVING MACHINE EQUIPPED WITH SUCH MECHANICS
FR2772792B1 (en) * 1997-12-24 2000-01-28 Staubli Sa Ets ELECTRIC ACTUATOR POSITIONING BOX FOR CROWD FORMATION AND WEAVING
FR2772796B1 (en) * 1997-12-24 2000-01-28 Staubli Sa Ets METHOD FOR MOUNTING A FUNICULAR ELEMENT, A CROWD FORMING DEVICE AND A WEAVING MATERIAL
DE19855709B4 (en) * 1998-12-03 2008-01-24 Helmut Hechinger Gmbh & Co. Guide bars for a jacquard weaving device
EP1016743B1 (en) * 1998-12-09 2003-04-16 Sultex AG Device for the controlled displacement of a weft thread
DE59905063D1 (en) 1998-12-09 2003-05-22 Sultex Ag Rueti Device for the controlled movement of a warp thread
DE10326757A1 (en) * 2003-06-13 2005-01-13 Bst Berger Safety Textiles Gmbh & Co. Kg Method for producing an airbag
SE533266C2 (en) * 2008-12-16 2010-08-03 Texo Ab Weaving machine with modular drive
US9079558B2 (en) 2009-01-16 2015-07-14 Global Safety Textiles, Llc Coated airbag

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1633475A (en) * 1927-06-21 carver
US1511456A (en) * 1922-08-10 1924-10-14 Fuchs Leopold Support for loom harness
US2136090A (en) * 1936-10-02 1938-11-08 Lefier Patent Company Inc Textile machine
US2136076A (en) * 1936-11-13 1938-11-08 Lefler Patent Company Inc Pattern control mechanism
US2609840A (en) * 1947-09-02 1952-09-09 Lawrence Atkins S Loom
BE790077A (en) * 1971-10-16 1973-04-13 Sulzer Ag ELECTROMECHANICAL DEVICE FOR TRAINING THE CROWD OF TRADE
US3867966A (en) * 1971-10-16 1975-02-25 Sulzer Ag Electro-mechanical device for forming a shed in a weaving machine
DE2904367C3 (en) * 1979-02-06 1982-01-07 Karl Mayer Textil-Maschinen-Fabrik Gmbh, 6053 Obertshausen Electromagnetic Jacqard control device
DE3006637A1 (en) * 1979-05-18 1980-11-20 Sulzer Ag JACQUARD FURNITURE, IN PARTICULAR FOR CHAIN-KNITTING MACHINES

Also Published As

Publication number Publication date
IT8119825A0 (en) 1981-02-18
DE3164357D1 (en) 1984-08-02
US4440196A (en) 1984-04-03
IT1135517B (en) 1986-08-27
EP0045758A1 (en) 1982-02-17
WO1981002312A1 (en) 1981-08-20
JPS57500112A (en) 1982-01-21
MC1319A1 (en) 1981-03-10
BE887551A (en) 1981-06-15

Similar Documents

Publication Publication Date Title
EP0045758B1 (en) Mechanical control for the shedding of warp ends of a loom and loom comprising such mechanical control
EP2087157B1 (en) System for weaving a continuous angle
EP1163385B1 (en) Bias-bound fabric, method for making same and weaving machine for continuously making such a fabric
FR1465855A (en) Pile loop fabric on both sides
EP0045759B1 (en) Improved device for the opening of the pitch on a loom
EP0570318B1 (en) Process for weaving thick reinforcement with several undelaminable layers for composite material and loom for its manufacture
EP1975291A1 (en) Loom and method for weaving single cloth uncut velvet
FR2476697A1 (en) METHOD AND DEVICE FOR FABRICATING FABRICS
EP0536029B1 (en) Process and machine for the formation of fibrous armatures
FR2785914A1 (en) DEVICE FOR FEEDING A MULTI-LAYERED, MULTI-AXIAL YARN LAYER TO THE KNITTING LOCATION OF A CHAIN KNITTING MACHINE
EP0127184A1 (en) Loom
EP0082794B1 (en) Device for the production of a fleece made of parallel yarns, and method for the production of various complex articles made with such a fleece
FR2524015A1 (en) DEVICE FOR INSERTING CHAIN YARNS IN WEAVING BEDS AND APPROPRIATE LAMINATES
FR2629480A1 (en) WEAVING A RETIER
CA2411706A1 (en) Weaving device for making thick fabric reinforcements and resulting reinforcements
CH577575A5 (en) Rapier loom - in which weft threads are carried on vertical flexible tapes with reed and finger supports
BE418115A (en)
FR3105271A1 (en) Velvet loom
FR2735796A1 (en) Loom for weaving pile fabrics with silk pattern weaves
WO1998018987A1 (en) Device for selecting weft yarn for a loom
FR2549103A1 (en) MACHINE FOR MAKING KNITTED AND WOVEN FABRICS
BE482244A (en)
EP0084471A1 (en) High-speed shuttleless loom
CH310218A (en) Loom.
CH237769A (en) Weaving process, loom for the implementation of this process and fabric obtained by this process.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19811012

AK Designated contracting states

Designated state(s): CH DE FR GB

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): CH DE FR GB LI

REF Corresponds to:

Ref document number: 3164357

Country of ref document: DE

Date of ref document: 19840802

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19850228

Ref country code: CH

Effective date: 19850228

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
GBPC Gb: european patent ceased through non-payment of renewal fee
REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19861031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19861101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881118