EP0292461B1 - Method for arranging the warp threads between the warp beam and the shed of a loom and for the realisation of the replacement of the warp beam, and loom for carrying it out - Google Patents

Method for arranging the warp threads between the warp beam and the shed of a loom and for the realisation of the replacement of the warp beam, and loom for carrying it out Download PDF

Info

Publication number
EP0292461B1
EP0292461B1 EP19880870040 EP88870040A EP0292461B1 EP 0292461 B1 EP0292461 B1 EP 0292461B1 EP 19880870040 EP19880870040 EP 19880870040 EP 88870040 A EP88870040 A EP 88870040A EP 0292461 B1 EP0292461 B1 EP 0292461B1
Authority
EP
European Patent Office
Prior art keywords
warp threads
warp
threads
clamping device
movement
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 - Lifetime
Application number
EP19880870040
Other languages
German (de)
French (fr)
Other versions
EP0292461A1 (en
Inventor
Henry Shaw
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.)
Picanol NV
Original Assignee
Picanol NV
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 Picanol NV filed Critical Picanol NV
Publication of EP0292461A1 publication Critical patent/EP0292461A1/en
Application granted granted Critical
Publication of EP0292461B1 publication Critical patent/EP0292461B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00Details or constructional features not specially adapted for looms of a particular type

Definitions

  • the present invention relates to a method for rectifying the path of warp threads between the beam and the shed on weaving machines, and in particular between the thread carrier on the one hand and the chain breakers or frames on the other hand. See for example DE-A-2043420.
  • the invention presented provides a method which completely excludes the drawback mentioned above during the rectification of the path of the chain strands as well as the beam changes.
  • the method presented essentially provides for a back-and-forth movement - the outward stroke and the return stroke may or may not be equal - between the chain ply and at least one of the machine members imposing a parallelism to the paths of the warp threads. It goes without saying that this relative movement can be obtained both by the movement of the warp threads, the organs of the machine remaining stationary (or vice versa), and by imposing a movement (by definition different) on the ply of chain and the relevant machine components.
  • the relevant parts of the machine will be the chain breaker and its blades, the frames and their healds, and other similar guiding devices. It is clear that the application of the method provided by the invention will have the effect of paralleling the warp threads which are not, by moving them in a relative movement relative to the frames and / or the chain breaker. .
  • the warp threads will preferably be immobilized by a clamping device to prevent them from crossing again on their return stroke.
  • the invention also relates to a method of carrying out beam changes during which the rectification of the path of the warp threads is carried out as described above, the assembled warp threads then being cut on the side of the device of tightening turned towards the beam, after which the threads of the new beam will be knotted to the already threaded warp threads and put in parallel.
  • the invention relates to a weaving machine implementing the method just defined.
  • Figure 1 gives a schematic view of part of a weaving machine and illustrates the process of a conventional weaving, according to which the warp (or ply) yarns 1 are unwound from a beam, pass over a carrier yarns 2 to then be guided in the strips 3 of the chain breaker 4, then by the healds 5 of the frames 6, before being integrated into the fabric 7.
  • the transition between the ply of the warp threads 1 and the fabric 7 is formed by the striking line 8, struck by the comb 9 to strike the weft threads inserted in the shed 10.
  • the invention presented makes it possible to satisfy this requirement by a relative displacement, in a back-and-forth movement, of the warp threads on the one hand and, on the other hand, of the organs of the machine which impose the parallelism of the paths warp threads.
  • a first application of this principle consists, as already mentioned, in moving only the warp threads 1, the chain breaker 4 and the frames 6 remaining stationary; as shown in Figures 2 and 3 respectively, this movement is achieved by the displacement of the ply 1, and therefore of the striking line 8, on a forward stroke of a length L1 followed by a return stroke of a length L2; this back-and-forth movement of the warp threads 1 placed in front of the striking line 8 drives them through the heddles 5 and strips of the chain breaker 3 (provided that the machine is equipped with a chain breaker), thereby ensuring that they are placed in parallel.
  • the distance L2 can be less than or equal to the distance L1.
  • a clamping device 11 of the ply will preferably be applied at the end of the forward stroke, this clamping device, intended to retain the ply 1 during its return stroke, being placed just behind the chain breaker 4.
  • the warp threads 1 can be cut using a cutting device 12, after which a new beam can be knotted between the clamping device 11 and the chain breaker 4.
  • Figure 4 shows schematically a weaving machine implementing the method described above.
  • the weaving machine is equipped with a movable guide device 2A, capable of moving over a long stroke.
  • the mobile guide device 2A will preferably be placed at the height of the wire holder 2 or, better still, constituted by the wire holder 2 itself.
  • the figure also represents the beam 13, the chest 14, the take-up roller 15 and the fabric roll 16.
  • the ply of the isolated warp threads 1 is represented by a broken line
  • the fabric is represented by a solid line.
  • the figure schematically represents drive devices such as the motors 17 to 20, respectively controlling the beam 13, the leaf and the comb 9, the take-up roller 15 and the fabric roller 16.
  • the main control members of the assembly include a control unit 21, a measurement unit 22 intended to detect the moment when the beam 13 is almost entirely unwound without being completely unwound, a starting circuit 23 attacking the control unit 21 so as to determine, according to a method described below, the automatic rectification of the paths of the warp son 1 and, optionally, a function programmer 24 making it possible to program the operations to be executed by the control unit 21.
  • the start-up circuit 23 can be controlled automatically or manually by the inputs 25 or 26, respectively.
  • FIGS. 5 to 8 represent the successive operations which make it possible to condition the warp threads 1 returned to the machine illustrated in FIG. 1 so as to allow the knotting of a new warp without difficulty.
  • the start-up circuit 23 attacks the control unit 21, which launches the automatic execution of the sequence of operations described below.
  • the guide device 2A is first of all brought back to the race L1 mentioned above; during this movement, the beam 13 unwinds a given length of ply while the winding device, composed of the take-up roller 15 and the fabric roll 16, remains stationary.
  • the take-up roller 15 and, optionally, the fabric roller 16 are driven in their normal direction of rotation, so that the striking line 8 moves towards the 'before.
  • the guide device 2A is driven forward and must overcome, for example, the resistance of an elastic device such as a set of springs. It is clear that the warp threads 1, passing through the strips of the chain breaker 3 and of the stringers 5, will be placed parallel to one another with respect to their portion comprised between the chain breaker 4 and the striking line 8 On weaving machines without chain breaker blades 3, the straightening of the paths of the warp threads will be ensured by the healds 5 alone.
  • the clamping device 11 placed next to the chain breaker 4 is applied to the warp threads 1.
  • the clamping device 11 will apply to the warp threads 1 next to the frames 6.
  • the take-up roller 15 and, possibly, the fabric roll 16 will be unwound in the wrong direction while the unwinding of the beam will be interrupted. This will bring back the guide device 2A, the warp threads 2A and the fabric 7; the clamping device 11 accompanying the movement. Finally, the beam 13 can be separated from the warp threads 1 using the cutting device 12, after which a new beam can be tied to the warp threads 1 placed in parallel, at a point between the tightening 11 and the chain breaker 4.
  • closing the crowd before the rectification of the ply has the advantage of allowing the positioning of the clamping device 11 in the immediate vicinity of the frames 6 or their heddles 5, at the end of the backward movement (i.e. the forward course) of the striking line 8.
  • the warp threads 1 reciprocate over relatively long strokes, so that the knotting of a new beam can be produced as illustrated in FIGS. 9 and 10.
  • the displacement of the line of striking can be obtained, for example, by unwinding and unwinding the fabric and warp threads over suitably chosen lengths, as described above.
  • a new beam 13A can be mounted after cutting the wires remaining on the active beam 13, when the latter is practically empty. The ends of the threads of the new beam 13A, held by means of a tightening device 27, will be placed on a knotter 28. As shown in FIG.
  • the warp threads 1 already retracted will also be led towards the knotter 28 ; they will be pulled through the chain breaker 4 and the stringers 5 by the retraction of the tightening device 11.
  • the ends 1 and 1A of the warp threads will be connected by a knotting device 31 known elsewhere. It is clear that in this variant, the warp threads 1 must carry out a forward stroke whose length is sufficient to allow them to be brought, subsequently, to the knotter 28 placed next to the weaving machine.
  • auxiliary devices such as additional clamping devices 32.
  • the clamping devices 27 and 32 may be integrated into the knotter's flanges 29 and 30.
  • the reciprocating movement concerns not the warp threads 1 but one or more components of the machine, and more particularly one of the components imposing the parallelism of the warp threads 1.
  • This variant of the invention offers the specific advantage of not requiring complex control of the fabric roll 16 and the beam 13.
  • the chain breaker 4 will constitute the mobile member mentioned above.
  • the method provided by the invention can be applied code illustrated in FIGS. 11 to 13.
  • the trajectory of the warp threads will not be corrected over distance A.
  • the chain breaker 4 By moving the chain breaker 4 towards the rear over the distance L1, as indicated in FIG. 12, that is to say by bringing it closer to the beam 13, we will then impose paths parallel to the warp threads 1.
  • a clamping device 11 will be applied to the warp threads 1 near the chain breaker to prevent the threads from crossing again during the return stroke.
  • the chain breaker 4 is brought back into position and the warp threads 1 are cut by the cutting device 12, after which they can be knotted at the ends of the threads coming from 'a new beam.
  • the weaving machine specifically intended to implement the method provided by the invention is characterized by the fact that it is equipped with a chain breaker 4 capable of moving in the direction longitudinal chain, and a drive device controlling the movement of the chain breaker 4.
  • the chain breaker 4 can be mounted on a slide 34 or a similar device
  • the drive device 33 can be consisting of a fixed jack 35 whose rod 36 controls the movement of the slide 34.
  • the drive device 33 can be composed of other systems than the jack which has just been mentioned.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
  • Looms (AREA)

Description

La présente invention a trait à une méthode permettant la rectification du trajet des fils de chaîne entre l'ensouple et la foule sur des machines à tisser, et en particulier entre le porte-fils d'une part et les casse-chaîne ou les cadres d'autre part. Voir par exemple DE-A-2043420.The present invention relates to a method for rectifying the path of warp threads between the beam and the shed on weaving machines, and in particular between the thread carrier on the one hand and the chain breakers or frames on the other hand. See for example DE-A-2043420.

On sait que sur les machines à tisser, une série de facteurs pouvant survenir pendant le tissage compromettent le parallélisme des fils de chaîne formant le nappe entre l'ensouple et les lamelles du casse-chaîne ou les lisses du cadre. Les défauts de parallélisme des fils de chaîne sont dus essentiellement à leur déplacement latéral lors de réparations après la rupture d'un fil de chaîne, lors du nouage d'un nouveau fil à un fil de chaîne trop court (généralement situé vers le bord de l'ensouple), suite à l'inversion d'une série de fils lors du nouage d'une nouvelle ensouple, suite à l'envidage irrégulier de l'ensouple, ou encore parce que le tisseur a touché la nappe en se penchant sur la machine pour effectuer une réparation.It is known that on weaving machines, a series of factors which may arise during weaving compromise the parallelism of the warp threads forming the web between the beam and the strips of the chain breaker or the heddles of the frame. The defects in the parallelism of the warp threads are mainly due to their lateral displacement during repairs after the breaking of a warp thread, when knotting a new thread to a too short warp thread (generally located towards the edge of the beam), following the inversion of a series of threads when knotting a new beam, following the irregular weaving of the beam, or even because the weaver touched the tablecloth by leaning on the machine to make a repair.

Comme le nouage d'une nouvelle ensouple nécessite un bon parallélisme des fils de chaîne, ceux-ci doivent être peignés ou brossés avant la mise en place de la nouvelle ensouple. Cette opération requiert un grand savoir-faire, un appareillage spécial et beaucoup de temps. De plus, le peignage manuel n'assure pas nécessairement un bon parallélisme de tous les fils de chaîne.As the knotting of a new warp requires a good parallelism of the warp threads, these must be combed or brushed before the installation of the new warp. This operation requires a great deal of know-how, special equipment and a lot of time. In addition, manual combing does not necessarily ensure good parallelism of all warp threads.

L'invention présentée procure une méthode qui exclut totalement l'inconvénient évoqué ci-dessus lors de la rectification du trajet des fils de -chaîne ainsi que les changements d'ensouple. Pour cela, la méthode présentée prévoit essentiellement un mouvement de va-et-vient -- la course aller et la course retour pouvant être égales, ou non -- entre la nappe de la chaîne et au moins un des organes de la machine imposant un parallélisme aux trajets des fils de chaîne. Il va de soi que ce mouvement relatif peut être obtenu tant par le déplacement des fils de chaîne, les organes concernés de la machine restant immobiles (ou vice-versa), qu'en imposant un mouvement (par définition différent) à la nappe de chaîne et aux organes concernés de la machine.The invention presented provides a method which completely excludes the drawback mentioned above during the rectification of the path of the chain strands as well as the beam changes. For this, the method presented essentially provides for a back-and-forth movement - the outward stroke and the return stroke may or may not be equal - between the chain ply and at least one of the machine members imposing a parallelism to the paths of the warp threads. It goes without saying that this relative movement can be obtained both by the movement of the warp threads, the organs of the machine remaining stationary (or vice versa), and by imposing a movement (by definition different) on the ply of chain and the relevant machine components.

Les organes concernés de la machine seront le casse-chaîne et ses lamelles, les cadres et leurs lisses, et d'autres dispositifs de guidage similaires. Il est clair que l'application de la méthode prévue par l'invention aura pour effet de mettre en parallèle les fils de chaîne qui ne le sont pas, en les déplaçant selon un mouvement relatif par rapport aux cadres et/ou le casse-chaîne.The relevant parts of the machine will be the chain breaker and its blades, the frames and their healds, and other similar guiding devices. It is clear that the application of the method provided by the invention will have the effect of paralleling the warp threads which are not, by moving them in a relative movement relative to the frames and / or the chain breaker. .

Après la course du mouvement relatif de va-et-vient, les fils de chaîne seront de préférence immobilisés par un dispositif de serrage pour éviter qu'ils ne se croisent à nouveau sur leur course retour.After the stroke of the relative back-and-forth movement, the warp threads will preferably be immobilized by a clamping device to prevent them from crossing again on their return stroke.

Par ailleurs, l'invention a également trait à une méthode d'exécution des changements d'ensouples lors desquels la rectification du trajet des fils de chaîne est effectuée comme décrit ci-dessus, les fils de chaîne montés étant alors coupés du côté du dispositif de serrage tourné vers l'ensouple, suite à quoi les fils de la nouvelle ensouple seront noués aux fils de chaîne déjà rentrés et mis en parallèle.Furthermore, the invention also relates to a method of carrying out beam changes during which the rectification of the path of the warp threads is carried out as described above, the assembled warp threads then being cut on the side of the device of tightening turned towards the beam, after which the threads of the new beam will be knotted to the already threaded warp threads and put in parallel.

Enfin, l'invention a trait à une machine à tisser mettant en oeuvre la méthode que l'on vient de définir.Finally, the invention relates to a weaving machine implementing the method just defined.

Afin de mieux mettre en lumière les caractéristiques de l'invention, on trouvera ci-après, en guise d'exemples sans caractère limitatif, la description de quelques variantes ainsi que d'une machine à tisser mettant en oeuvre la méthode préconisée, avec référence aux dessins annexés, où:

  • La figure 1 représente le problème du défaut de parallélisme des fils de chaîne;
  • les figures 2 et 3 représentent deux états fonctionnels principaux du principe conforme à la méthode prévue par l'invention;
  • les figures 4 à 8 représentent la réalisation concrète, sur une machine à tisser, du principe illustré aux figures 2 et 3, et permettant des changements d'ensouple sans risque de défaut de parallélisme des fils de chaîne;
  • les figures 9 et 10 représentent le nouage d'un nouvelle ensouple;
  • les figures 11 à 13 représentent, pas à pas, une variante d'installation mettant en oeuvre la méthode prévue par l'invention.
In order to better highlight the characteristics of the invention, we will find below, by way of non-limiting examples, the description of some variants as well as a weaving machine implementing the recommended method, with reference in the accompanying drawings, where:
  • FIG. 1 represents the problem of the lack of parallelism in the warp threads;
  • Figures 2 and 3 show two main functional states of the principle according to the method provided by the invention;
  • Figures 4 to 8 show the concrete embodiment, on a weaving machine, of the principle illustrated in Figures 2 and 3, and allowing beam changes without risk of lack of parallelism of the warp son;
  • Figures 9 and 10 show the knotting of a new beam;
  • Figures 11 to 13 show, step by step, a variant installation using the method provided by the invention.

La figure 1 donne une vue schématique d'une partie d'une machine à tisser et illustre le processus d'un tissage classique, selon lequel les fils de chaîne (ou nappe) 1 sont dévidés d'une ensouple, passent sur un porte-fils 2 pour être guidés ensuite dans les lamelles 3 du casse-chaîne 4, puis par les lisses 5 des cadres 6, avant d'être intégrés au tissu 7. La transition entre la nappe des fils de chaîne 1 et le tissu 7 est constituée par la ligne de frappe 8, frappée par le peigne 9 pour frapper les fils de trame insérés dans la foule 10.Figure 1 gives a schematic view of part of a weaving machine and illustrates the process of a conventional weaving, according to which the warp (or ply) yarns 1 are unwound from a beam, pass over a carrier yarns 2 to then be guided in the strips 3 of the chain breaker 4, then by the healds 5 of the frames 6, before being integrated into the fabric 7. The transition between the ply of the warp threads 1 and the fabric 7 is formed by the striking line 8, struck by the comb 9 to strike the weft threads inserted in the shed 10.

Comme nous l'avons indiqué dans l'introduction, il arrive parfois que certains fils de chaîne 1 composant la nappe entre l'ensouple et le casse-chaîne 4 ne soient pas placés parallèlement les uns aux autres et que, plus particulièrement, ils affectent un agencement tel que celui indiqué à la figure 1 sur la distance A. Cependant, certaines applications dont en particulier le nouage d'une nouvelle ensouple requièrent un bon parallélisem des fils de chaîne 1 sur leur trajet entre le casse-chaîne 4 et le porte-fille 2.As we indicated in the introduction, it sometimes happens that certain warp threads 1 composing the ply between the beam and the chain breaker 4 are not placed parallel to each other and that, more particularly, they affect an arrangement such as that indicated in FIG. 1 over distance A. However, certain applications including in particular the knotting of a new beam require a good parallelism of the warp threads 1 on their path between the chain breaker 4 and the carrier - girl 2.

L'invention présentée permet de satisfaire cette exigence par un déplacement relatif, selon un mouvement de va-et-vient, des fils de chaîne d'une part et, d'autre part, des organes de la machine qui imposent le parallélisme des trajets des fils de chaîne.The invention presented makes it possible to satisfy this requirement by a relative displacement, in a back-and-forth movement, of the warp threads on the one hand and, on the other hand, of the organs of the machine which impose the parallelism of the paths warp threads.

Une première application de ce principe consiste, comme il a déjà été mentionné, à déplacer uniquement les fils de chaîne 1, le casse-chaîne 4 et les cadres 6 restant immobiles; comme indiqué aux figures 2 et 3 respectivement, ce mouvement est réalisé par le déplacement de la nappe 1, et par conséquent de la ligne de frappe 8, sur une course aller d'une longueur L1 suivie d'une course retour d'une longueur L2; ce mouvement de va-et-vient des fils de chaîne 1 placés devant la ligne de frappe 8 les entraîne au travers des lisses 5 et des lamelles du casse-chaîne 3 (pour autant que la machine soit équipée d'un casse-chaîne), assurant de ce fait même leur mise en parallèle. Il convient de noter que la distance L2 peut être inférieure ou égale à la distance L1. Pour éviter que les fils de chaîne 1 ne se croisent lors de leur course retour, on appliquera de préférence un dispositif de serrage 11 de la nappe à la fin de la course aller, ce dispositif de serrage, destiné à retenir la nappe 1 pendant sa course retour, étant placé juste derrière le casse-chaîne 4.A first application of this principle consists, as already mentioned, in moving only the warp threads 1, the chain breaker 4 and the frames 6 remaining stationary; as shown in Figures 2 and 3 respectively, this movement is achieved by the displacement of the ply 1, and therefore of the striking line 8, on a forward stroke of a length L1 followed by a return stroke of a length L2; this back-and-forth movement of the warp threads 1 placed in front of the striking line 8 drives them through the heddles 5 and strips of the chain breaker 3 (provided that the machine is equipped with a chain breaker), thereby ensuring that they are placed in parallel. It should be noted that the distance L2 can be less than or equal to the distance L1. To prevent the warp threads 1 from crossing during their return stroke, a clamping device 11 of the ply will preferably be applied at the end of the forward stroke, this clamping device, intended to retain the ply 1 during its return stroke, being placed just behind the chain breaker 4.

Du côté du dispositif de serrage 11 orienté vers le porte-fils 2, les fils de chaîne 1 peuvent être sectionnés à l'aide d'un dispositif de coupe 12, suite à quoi une nouvelle ensouple peut être nouée entre le dispositif de serrage 11 et le casse-chaîne 4.On the side of the clamping device 11 oriented towards the thread holder 2, the warp threads 1 can be cut using a cutting device 12, after which a new beam can be knotted between the clamping device 11 and the chain breaker 4.

La figure 4 présente de manière schématique une machine à tisser mettant en oeuvre la méthode décrite ci-dessus. Dans la forme d'exécution illustrée, la machine à tisser est équipée d'un dispositif de guidage mobile 2A, capable de se déplacer sur une longue course. Le dispositif de guidage mobile 2A sera placé de préférence à hauteur du porte-fils 2 ou, mieux encore, constitué par le porte-fils 2 lui-même. Outre les organes déjà mentionnés, la figure représente également l'ensouple 13, la poitrinière 14, le rouleau d'appel 15 et le rouleau de tissu 16. La nappe des fils de chaîne 1 isolés est représentée par une ligne interrompue, le tissu est représentée par une ligne continue. De plus, la figure représente de manière schématique des dispositifs d'entraînement tels que les moteurs 17 à 20, commandant respectivement l'ensouple 13, le battant et le peigne 9, le rouleau d'appel 15 et le rouleau de tissu 16. Les organes de commande principaux de l'ensemble incluent une unité de commande 21, une unité de mesure 22 destinée à détecter le moment où l'ensouple 13 est presque entièrement dévidée sans l'etre tout à fait, un circuit de mise en marche 23 attaquant l'unité de commande 21 de manière à déterminer, selon une méthode décrite plus loin, la rectification automatique des trajets des fils de chaîne 1 et, éventuellement, un programmateur de fonctions 24 permettant de programmer les opérations à exécuter par l'unité de commande 21. Le circuit de mise en marche 23 peut être commandé automatiquement ou manuellement par les entrées 25 ou 26, respectivement.Figure 4 shows schematically a weaving machine implementing the method described above. In the illustrated embodiment, the weaving machine is equipped with a movable guide device 2A, capable of moving over a long stroke. The mobile guide device 2A will preferably be placed at the height of the wire holder 2 or, better still, constituted by the wire holder 2 itself. In addition to the organs already mentioned, the figure also represents the beam 13, the chest 14, the take-up roller 15 and the fabric roll 16. The ply of the isolated warp threads 1 is represented by a broken line, the fabric is represented by a solid line. In addition, the figure schematically represents drive devices such as the motors 17 to 20, respectively controlling the beam 13, the leaf and the comb 9, the take-up roller 15 and the fabric roller 16. The main control members of the assembly include a control unit 21, a measurement unit 22 intended to detect the moment when the beam 13 is almost entirely unwound without being completely unwound, a starting circuit 23 attacking the control unit 21 so as to determine, according to a method described below, the automatic rectification of the paths of the warp son 1 and, optionally, a function programmer 24 making it possible to program the operations to be executed by the control unit 21. The start-up circuit 23 can be controlled automatically or manually by the inputs 25 or 26, respectively.

Les figures 5 à 8 représentent les opérations successives qui permettent de conditionner les fils de chaîne 1 rentrés sur la machine illustrée à la figure 1 de manière à autoriser le nouage sans difficulté d'une nouvelle ensouple.FIGS. 5 to 8 represent the successive operations which make it possible to condition the warp threads 1 returned to the machine illustrated in FIG. 1 so as to allow the knotting of a new warp without difficulty.

Lorsque l'unité de mesure 22 détecte le quasi-épuisement de l'ensouple 13, le circuit de mise en marche 23 attaque l'unité de commande 21, qui lance l'exécution automatique de la séquence d'opérations décrite ci-après. Comme indiqué à la figure 5, le dispositif de guidage 2A est ramené tout d'abord vers l'arrière sur la course L1 évoquée précédemment; pendant ce mouvement, l'ensouple 13 dévide une longueur de nappe donnée tandis que le dispositif d'enroulement, composé du rouleau d'appel 15 et du rouleau de tissu 16, reste immobile.When the measurement unit 22 detects the near exhaustion of the beam 13, the start-up circuit 23 attacks the control unit 21, which launches the automatic execution of the sequence of operations described below. As shown in Figure 5, the guide device 2A is first of all brought back to the race L1 mentioned above; during this movement, the beam 13 unwinds a given length of ply while the winding device, composed of the take-up roller 15 and the fabric roll 16, remains stationary.

Dans une deuxième phase (illustrée à la figure 6), le rouleau d'appel 15 et, éventuellement, le rouleau de tissu 16 sont entraînés dans leur sens de rotation normal, de manière à ce que la ligne de frappe 8 se déplace vers l'avant. Pendant ce mouvement, le dispositif de guidage 2A est entraîné vers l'avant et doit vaincre, par exemple, la résistance d'un dispositif élastique tel qu'un ensemble de ressorts. Il est clair que les fils de chaîne 1, passant au travers des lamelles du casse-chaîne 3 et des lisses 5, seront placées parallèlement les un par rapport aux autres sur leur portion comprise entre le casse-chaîne 4 et la ligne de frappe 8. Sur les machines à tisser dépourvues de lamelles de casse-chaîne 3, la rectification des trajets des fils de chaîne sera assurée par les lisses 5 seules.In a second phase (illustrated in FIG. 6), the take-up roller 15 and, optionally, the fabric roller 16 are driven in their normal direction of rotation, so that the striking line 8 moves towards the 'before. During this movement, the guide device 2A is driven forward and must overcome, for example, the resistance of an elastic device such as a set of springs. It is clear that the warp threads 1, passing through the strips of the chain breaker 3 and of the stringers 5, will be placed parallel to one another with respect to their portion comprised between the chain breaker 4 and the striking line 8 On weaving machines without chain breaker blades 3, the straightening of the paths of the warp threads will be ensured by the healds 5 alone.

Au cours d'une troisième phase (illustrée à la figure 7), le dispositif de serrage 11 placé à côté du casse-chaîne 4 est appliqué sur les fils de chaîne 1. En l'absence du casse-chaîne, le dispositif de serrage 11 s'appliquera sur les fils de chaîne 1 à côté des cadres 6.During a third phase (illustrated in FIG. 7), the clamping device 11 placed next to the chain breaker 4 is applied to the warp threads 1. In the absence of the chain breaker, the clamping device 11 will apply to the warp threads 1 next to the frames 6.

Au cours d'une phase suivante (illustrée à la figure 8), le rouleau d'appel 15 et, éventuellement, le rouleau de tissu 16 seront dévidés à contresens tandis que le dévidage de l'ensouple sera interrompu. Cela aura pour effet de ramener vers l'arrière le dispositif de guidage 2A, les fils de chaîne 2A et le tissu 7; le dispositif de serrage 11 accompagnant le mouvement. Enfin, l'ensouple 13 pourra être séparée des fils de chaîne 1 à l'aide du dispositif de coupe 12, suite à quoi une nouvelle ensouple pourra être nouée aux fils de chaîne 1 mis en parallèle, en un point compris entre le dispositif de serrage 11 et le casse-chaîne 4.During a following phase (illustrated in FIG. 8), the take-up roller 15 and, possibly, the fabric roll 16 will be unwound in the wrong direction while the unwinding of the beam will be interrupted. This will bring back the guide device 2A, the warp threads 2A and the fabric 7; the clamping device 11 accompanying the movement. Finally, the beam 13 can be separated from the warp threads 1 using the cutting device 12, after which a new beam can be tied to the warp threads 1 placed in parallel, at a point between the tightening 11 and the chain breaker 4.

Bien que la foule 10 est représentée à nappes séparées sur tous les croquis mentionnés, il est clair qu'il sera indiqué, dans cetains cas, de fermer la foule avant de commander le mouvement de va-et-vient des fils de chaîne 1. Sur les machines dépourvues du casse-chaîne 4 en particulier, la fermeture de la foule avant la rectification de la nappe présente l'avantage de permettre le positionnement du dispositif de serrage 11 à proximité immédiate des cadres 6 ou de leurs lisses 5, à la fin du mouvement de recul (c'est-à-dire de la cours aller) de la ligne de frappe 8.Although the crowd 10 is shown with separate layers on all the sketches mentioned, it is clear that it will be indicated, in some cases, to close the crowd before controlling the back and forth movement of the warp threads 1. On machines without the chain breaker 4 in particular, closing the crowd before the rectification of the ply has the advantage of allowing the positioning of the clamping device 11 in the immediate vicinity of the frames 6 or their heddles 5, at the end of the backward movement (i.e. the forward course) of the striking line 8.

Dans une variante particulière de la méthode prévue par l'invention et illustrée aux figures 1 à 8, les fils de chaîne 1 effectuent leur mouvement de va-et-vient sur des courses relativement longues, de telle sorte que le nouage d'une nouvelle ensouple peut être réalisé comme illustré aux figures 9 et 10. Dans cette variante, le déplacement de la ligne de frappe peut être obtenu, par exemple, par envidage et dévidage du tissu et des fils de chaîne sur des longueurs convenablement choisies, comme décrit précédemment. Au cours de ce mouvement, une nouvelle ensouple 13A peut être montée après sectionnement des fils restant sur l'ensouple active 13, lorsque celle-ci est pratiquement vide. Les extrémités des fils de la nouvelle ensouple 13A, maintenues au moyen d'un dispositif de serrage 27, seront disposées sur un noueur 28. Comme indiqué à la figure 10, les fils de chaîne 1 déjà rentrés seront eux aussi menés vers le noueur 28; ils seront tirés à travers le casse-chaîne 4 et les lisses 5 par le recul du dispositif de serrage 11. Après la fermeture des brides 29 et 30 du noueur, les extrémités 1 et 1A des fils de chaîne seront reliées par un dispositif de nouage 31 connu par ailleurs. Il est clair que dans cette variante, les fils de chaîne 1 doivent effectuer une course aller dont la longueur soit suffisante pour leur permettre d'être amenés, par la suite, jusqu'au noueur 28 placé à côté de la machine à tisser.In a particular variant of the method provided by the invention and illustrated in FIGS. 1 to 8, the warp threads 1 reciprocate over relatively long strokes, so that the knotting of a new beam can be produced as illustrated in FIGS. 9 and 10. In this variant, the displacement of the line of striking can be obtained, for example, by unwinding and unwinding the fabric and warp threads over suitably chosen lengths, as described above. During this movement, a new beam 13A can be mounted after cutting the wires remaining on the active beam 13, when the latter is practically empty. The ends of the threads of the new beam 13A, held by means of a tightening device 27, will be placed on a knotter 28. As shown in FIG. 10, the warp threads 1 already retracted will also be led towards the knotter 28 ; they will be pulled through the chain breaker 4 and the stringers 5 by the retraction of the tightening device 11. After the closing of the flanges 29 and 30 of the knotter, the ends 1 and 1A of the warp threads will be connected by a knotting device 31 known elsewhere. It is clear that in this variant, the warp threads 1 must carry out a forward stroke whose length is sufficient to allow them to be brought, subsequently, to the knotter 28 placed next to the weaving machine.

Afin d'assurer le parallélisme des extrémités des fils venant de la nouvelle ensouple 13A à hauteur du noueur, on peut bien entendu recourir à des dispositifs auxiliaires tels que des dispositifs de serrage supplémentaires 32. Eventuellement, les dispositifs de serrage 27 et 32 pourront être intégrés aux brides 29 et 30 du noueur.In order to ensure the parallelism of the ends of the threads coming from the new beam 13A at the height of the knotter, it is of course possible to use auxiliary devices such as additional clamping devices 32. Optionally, the clamping devices 27 and 32 may be integrated into the knotter's flanges 29 and 30.

Dans une autre variante d'application de l'invention, déjà mentionnée dans l'introduction, le mouvement de va-et-vient concerne non pas les fils de chaîne 1 mais un ou plusieurs organes de la machine, et plus particulièrement un des organes imposant le parallélisme des fils de chaîne 1. Cette variante de l'invention offre l'avantage spécifique de ne pas nécessiter de commande complexe du rouleau de tissu 16 et de l'ensouple 13.In another variant of application of the invention, already mentioned in the introduction, the reciprocating movement concerns not the warp threads 1 but one or more components of the machine, and more particularly one of the components imposing the parallelism of the warp threads 1. This variant of the invention offers the specific advantage of not requiring complex control of the fabric roll 16 and the beam 13.

Dans la variante d'exécution préférentielle de l'invention, qui est aussi la plus simple, le casse-chaîne 4 constituera l'organe mobile évoqué ci-dessus. Dans ce cas, la méthode prévue par l'invention peut être appliquée code illustré aux figures 11 à 13. Dans un premier temps, la trajectoire des fils de chaîne ne sera pas rectifiée sur la distance A. En déplaçant le casse-chaîne 4 vers l'arrière sur la distance L1, comme indiqué à la figure 12, c'est-à-dire en la rapprochant de l'ensouple 13, on imposera alors des trajets parallèles aux fils de chaîne 1. A la fin de la course L1, un dispositif de serrage 11 sera appliqué sur les fils de chaîne 1 à proximité du casse-chaîne pour éviter que les fils ne se croisent à nouveau lors de la course retour.In the preferred embodiment variant of the invention, which is also the simplest, the chain breaker 4 will constitute the mobile member mentioned above. In this case, the method provided by the invention can be applied code illustrated in FIGS. 11 to 13. At first, the trajectory of the warp threads will not be corrected over distance A. By moving the chain breaker 4 towards the rear over the distance L1, as indicated in FIG. 12, that is to say by bringing it closer to the beam 13, we will then impose paths parallel to the warp threads 1. At the end of the stroke L1 , a clamping device 11 will be applied to the warp threads 1 near the chain breaker to prevent the threads from crossing again during the return stroke.

Au cours d'une dernière phase illustrée à la figure 13, le casse-chaîne 4 est ramené en position et les fils de chaîne 1 sont sectionnés par le dispositif de coupe 12, suite à quoi ils peuvent être noués aux extrémités des fils venant d'une nouvelle ensouple.During a last phase illustrated in FIG. 13, the chain breaker 4 is brought back into position and the warp threads 1 are cut by the cutting device 12, after which they can be knotted at the ends of the threads coming from 'a new beam.

La description qui précède met clairement en lumière que la machine à tisser spécifiquement destinée à mettre en oeuvre la méthode prévue par l'invention se caractérise par le fait qu'elle est équipée d'un casse-chaîne 4 capable de se déplacer dans le sens longitudinal de la chaîne, et d'un dispositif d'entraînement commandant le mouvement du casse-chaîne 4. Pour cela, le casse-chaîne 4 peut être monté sur un coulisseau 34 ou un dispositif similaire, le dispositif d'entraînement 33 pouvant être constitué d'un vérin fixe 35 dont la tige 36 commande le mouvement du coulisseau 34.The above description clearly highlights that the weaving machine specifically intended to implement the method provided by the invention is characterized by the fact that it is equipped with a chain breaker 4 capable of moving in the direction longitudinal chain, and a drive device controlling the movement of the chain breaker 4. For this, the chain breaker 4 can be mounted on a slide 34 or a similar device, the drive device 33 can be consisting of a fixed jack 35 whose rod 36 controls the movement of the slide 34.

Il va de soi que le dispositif d'entraînement 33 peut être composé d'autres systèmes que le vérin que l'on vient de mentionner.It goes without saying that the drive device 33 can be composed of other systems than the jack which has just been mentioned.

Enfin, il est à noter, comme l'illustrent par exemple les figures 2 et 12, que l'on pourra prévoir un dispositif de guidage 37 destiné à maintenir la configuration de la foule 38 de la chaîne pendant la rectification des trajets des fils de chaîne 1. Ce dispositif de guidage n'est cependant pas indispensable, puisque la géométrie de la foule 38 peut éventuellement se modifier, comme indiqué par le repère 39 de la figure 12. La déformation de la foule 38 peut par ailleurs être évitée sans recourir au dispositif de guidage 37, en fermant la foule pendant la rectification des trajets de fils de chaîne.Finally, it should be noted, as illustrated for example in FIGS. 2 and 12, that it is possible to provide a guide device 37 intended to maintain the configuration of the shed 38 of the chain during the rectification of the paths of the wires of chain 1. This guiding device is however not essential, since the geometry of the shed 38 can possibly be modified, as indicated by the reference 39 in FIG. 12. The deformation of the shed 38 can moreover be avoided without resorting to the guide device 37, closing the shed during the rectification of the warp thread paths.

Claims (14)

  1. Method for rectifying the trajectories of the warp threads between the warp beam and the shed of weaving machines, characterized in that it mainly consists of a to-and-fro movement between the warp threads and at least one of the machine elements (4, 6) which make the trajectories of the warp threads run parallel.
  2. Method according to claim 1, characterized in that the relative displacement according to a to-and-fro movement of the warp threads (1) and the machine elements is brought about by, at least, a movement of the warp threads (1) during which they go forward over a distance (L1) and come back over a distance (L2).
  3. Method according to claim 1, characterized in that the relative displacement according to a to-and-fro movement of the warp threads (1) and the machine elements is brought about by the displacement, at least, of the warp stop motion (4) of the weaving machine.
  4. Method according to claim 1, characterized in that the relative displacement according to a to-and-fro movement of the warp threads (1) and the machine elements is brought about by the displacement of at least one of the harnesses (6) of the weaving machine.
  5. Method according to any of the above claims, characterized in that the forward and backward travels (L1, L2) of the relative displacement according to a to-and-fro movement are identical.
  6. Method according to any of the above claims, characterized in that in between the forward travel and the backward travel of the to-and-fro movement of the warp threads (1) and the machine elements, the warp threads (1) are gripped by a clamping device (11) such that the warp threads (1), after their trajectories have been rectified, cannot cross again.
  7. Method according to claim 2, characterized in that after the forward travel of the warp threads (1) and before their backward travel, they are clamped by means of a clamping device (11) situated next to the warp stop motion (4) or, if the machine is not provided with a warp stop motion (4), next to the harnesses (6), after which said clamping device (11) follows the movement of the warp threads (1) on their backward travel.
  8. Method according to claim 2, characterized in that the displacement of the warp threads (1) on their forward and backward travels is achieved by the unwinding of the warp threads (1) whilst the cloth beam is brought to a standstill, followed by the winding of the cloth (7) on the cloth beam whilst the unwinding of the warp beam has been stopped, after which the cloth (7) is unwound in the opposite sense and the warp threads (1) are passed, also in the opposite sense, through the harnesses (6) of the weaving machine, whereby the warp beam is brought to a standstill during the latter movement.
  9. Method for realizing a warp beam change with rectification of the trajectories of the warp threads according to claim 7, characterized in that after the backward movement of the warp threads (1) with an accompanying backward movement of the clamping device (11), the warp threads (1) are cut off along the clamping device (11), on the side directed towards the warp beam (13) after which a new warp beam (13A) is put in place and the warp threads (1), which are available on the machine and have been rectified, are connected to the warp threads (1A) of the new warp beam (13A).
  10. Method according to claim 9, characterized in that after the warp threads coming from the warp beam (13) have been cut off, the rectified warp threads (1) and their clamping device (11), as well as the warp threads (1A) kept in position by the clamping devices (27, 27A) and coming from the new warp beam (13A), are led to and presented to a tying-in device (28) realizing the connection between the warp threads (1) and (1A).
  11. Weaving machine applying the method according to any of claims 1, 2, 5 to 8, characterized in that it is provided, at the height of the back rest (2), with a guiding element (2A) for the warp threads (1) which can be moved backward.
  12. Weaving machine according to claim 11, characterized in that the guiding element (2A) is formed by the back rest (2) itself.
  13. Weaving machine applying the method according to claim 3, characterized in that it is provided with a warp stop motion (4) which can move according to a to-and-fro movement in the direction of the warp threads (1) and with a drive element (33) which controls the movements of the warp stop motions (4).
  14. Weaving machine according to claim 11, 12 or 13, characterized in that it is provided with a clamping device (11) situated between the back rest (2) and the warp stop motion (4) or the harnesses (6), whereby the clamping device (11) can hold back the warp threads (1) over the entire width of the cloth, as well as with a cutting device (12) designed to cut off the warp threads (1) along the clamping device (11) on the side directed towards the warp beam (13).
EP19880870040 1987-04-02 1988-03-10 Method for arranging the warp threads between the warp beam and the shed of a loom and for the realisation of the replacement of the warp beam, and loom for carrying it out Expired - Lifetime EP0292461B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8700340 1987-04-02
BE8700340A BE1000447A4 (en) 1987-04-02 1987-04-02 METHOD FOR ORGANIZING CHAIN ​​WIRES BETWEEN THE CHAIN ​​TREE AND GAAP IN LOOMS AND FOR PERFORMING A CHAIN ​​TREE EXCHANGE, AND USED FOR THIS PURPOSE loom.

Publications (2)

Publication Number Publication Date
EP0292461A1 EP0292461A1 (en) 1988-11-23
EP0292461B1 true EP0292461B1 (en) 1992-12-23

Family

ID=3882597

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880870040 Expired - Lifetime EP0292461B1 (en) 1987-04-02 1988-03-10 Method for arranging the warp threads between the warp beam and the shed of a loom and for the realisation of the replacement of the warp beam, and loom for carrying it out

Country Status (3)

Country Link
EP (1) EP0292461B1 (en)
BE (1) BE1000447A4 (en)
DE (1) DE3876856T2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018211531B4 (en) * 2018-07-11 2020-03-05 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Loom and method for guiding a fabric in a loom

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2043420A1 (en) * 1970-09-02 1972-03-09 Maschinenfabrik Benninger AG, Uz wil (Schweiz) Warp sheet dividing comb - for holding ends in sequence
IT1179857B (en) * 1984-12-10 1987-09-16 Ergotron Sas Di Dondi Benelli DEVICE FOR RESTORING IN A TEXTILE FRAME OPERATING CONDITIONS PRESETED TO RESUME OPERATION AFTER AN INTERRUPTION IN PARTICULAR AFTER A WEFT BREAK

Also Published As

Publication number Publication date
DE3876856D1 (en) 1993-02-04
EP0292461A1 (en) 1988-11-23
BE1000447A4 (en) 1988-12-06
DE3876856T2 (en) 1993-04-29

Similar Documents

Publication Publication Date Title
FR2527655A1 (en) WEAVING WITHOUT SHUTTLE INCLUDING A MEANS FOR REMOVING DEFECTIVE WIRES FROM FRAME, MOB
FR2537168A1 (en) WOVEN WORK WITHOUT A SHUTTLE COMPRISING A MEANS FOR REMOVING, FROM THE CROWD, DEFECTIVE WIRES OF FRAME
EP1923495B1 (en) Method for treating a weft insertion error in a loom
BE1012014A3 (en) Device for waste removal in a frame loom a nozzles.
EP0292461B1 (en) Method for arranging the warp threads between the warp beam and the shed of a loom and for the realisation of the replacement of the warp beam, and loom for carrying it out
FR2584745A1 (en) METHOD OF INSERTING FRAME YARNS IN NON-SHUTTER WEAVING THROUGH ENGRAVED AND RETRACTED CROWN CLAMPS EQUIPPED WITH FRAME WIRE PINING DEVICES, AND NON-SHUTTLE WEDDING MACHINE FOR CARRYING OUT DUDIT METHOD
FR2690929A1 (en) Improvement for a loom without shuttle.
BE1003724A5 (en) System wire splice for chain ​​of a loom.
FR2599389A1 (en) DEVICE FOR TRANSFERRING FRAME WIRES TO THE INSERTION MEMBERS OF FRAME WIRES OF WEAVING FABRICS WITHOUT SHUTTERS
FR2541322A1 (en) WEAVING WITHOUT SHUTTLE INSERTING FRAME WIRES BY ADVANCED GRIPPING SYSTEMS IN THE CROWN, THEN RETRACTED THEREWITH
EP0446150B1 (en) Device for automatically unweaving on looms with mechanical weft insertion means
EP0266286B1 (en) Weft insertion device for shuttleless looms
FR2610646A1 (en) DEVICE FOR CUTTING FRAME WIRE FOR WEAVING
FR2466548A1 (en) Shuttleless loom weft withdrawal device - cuts down weft losses at selvedges
FR1242372A (en) Improvements to devices for producing selvedges, in particular for shuttle-less looms
FR1310490A (en) Improvements to looms with fixed weft reserve
EP0119122B1 (en) Device for presenting the weft to the insertion needle of a loom, and loom provided therewith
BE1016284A3 (en) Method and device for preventing generation in a bar loom.
FR2486972A1 (en) False selvedge offtake stop motion for shuttleless loom - using selvedge feelers linked to warp stop motion droppers
BE1012999A3 (en) Frame restraints looms type fluid jets.
FR2690466A1 (en) Device for the presentation of the weft yarn to the pliers of pliers weaving machines.
BE488195A (en)
FR2618804A1 (en) Method and device for automatically extracting defective weft threads on a shuttleless weaving machine
FR2549103A1 (en) MACHINE FOR MAKING KNITTED AND WOVEN FABRICS
FR2512469A1 (en) WEAVING WITHOUT SHUTTLE

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR IT LI

17P Request for examination filed

Effective date: 19881206

17Q First examination report despatched

Effective date: 19911128

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR IT LI

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 3876856

Country of ref document: DE

Date of ref document: 19930204

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
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19980226

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19980326

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19990215

Year of fee payment: 12

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

Ref country code: LI

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

Effective date: 19990331

Ref country code: CH

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

Effective date: 19990331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: DE

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

Effective date: 20000101

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: 20001130

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: IT

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

Effective date: 20050310