EP0309012A1 - Pneumatic thread clamp and device for detaching a weft thread from the beat-up line on weaving looms with such a clamp - Google Patents

Pneumatic thread clamp and device for detaching a weft thread from the beat-up line on weaving looms with such a clamp Download PDF

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Publication number
EP0309012A1
EP0309012A1 EP88201571A EP88201571A EP0309012A1 EP 0309012 A1 EP0309012 A1 EP 0309012A1 EP 88201571 A EP88201571 A EP 88201571A EP 88201571 A EP88201571 A EP 88201571A EP 0309012 A1 EP0309012 A1 EP 0309012A1
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EP
European Patent Office
Prior art keywords
suction
pneumatic
wire clamp
wire
clamp
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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.)
Granted
Application number
EP88201571A
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German (de)
French (fr)
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EP0309012B1 (en
Inventor
Henry Shaw
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Picanol NV
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Picanol NV
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/06—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping
    • D03D51/08—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping stopping at definite point in weaving cycle, or moving to such point after stopping
    • D03D51/085—Extraction of defective weft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • B65H63/088—Clamping device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a pneumatic wire gripper.
  • the present invention relates to a device intended for detaching, on a weaving machine, a weft thread from the threshing line using such a pneumatic clamp.
  • the present invention relates to a pneumatic wire clamp whose application systematically excludes the drawbacks which have just been mentioned.
  • the wire clamp according to the invention essentially consists of a suction element provided with at least one suction orifice which can interact with a weaving thread, as well as a thread guide device arranged around the suction port.
  • the wire clamp consists of a tubular suction element, one of the axial ends of which is closed and the other end of which is connected to a suction system; on this suction element, the wire guide device is constituted by a V-shaped cutout arranged in the side wall of the tubular element, the suction orifice being placed in the bottom of the V-shaped cutout
  • the pneumatic wire gripper 1 mainly consists of a suction element 2 provided, on the one hand, with at least one suction orifice 3 which can interact with a and a single wire 4 and, on the other hand, a wire guide device 5 adjoining the suction orifice 3.
  • the suction element 2 is formed by a simple tubular element closed at its lower end 6, the wire guide devices 5 being formed of a V-shaped cutout and the suction orifice 3 being located in the bottom 7 of the V-shaped cutout.
  • FIG. 1 The use of this device is clearly shown in Figures 1 and 2.
  • the device itself consists essentially of a pneumatic clamp for wire 1 which is moved towards a wire 4; the wire guide device 5 automatically feeds the wire to the bottom 7 of the V-shaped cutout, where the wire is retained by the suction opening 3.
  • FIG. 2 it is clear that the opening 3 will be completely or almost completely blocked by the presence of the wire 4, which has the advantage that the clamp will never take more than one wire at a time.
  • FIG. 3 uses a suction element 2 composed of an air intake channel 8, an air evacuation channel 9 and a mechanism 10, placed in the air evacuation channel and making it possible to create a depression at the level of the suction orifice 3.
  • the air supply channel 8 communicates from below with the air evacuation channel 9.
  • the mechanism 10 creates a local tightening 11, for example by means of a bulge in the wall 12 opposite the suction orifice 3.
  • the air supply channel 8 can receive a compressed air connection 13.
  • the operation of the clamp essentially rests on the fact that the air flow 14 expelled by the compressed air connection 13 creates, at the level of the constriction 11, a depression such that it generates a secondary air flow 15 causing a suction effect through port 3.
  • FIG. 4 represents an alternative embodiment in which the mechanism 10 is formed by a spherical or piriform body 16 mounted in the air evacuation channel 9 and which, driven by a screw device 17 controlled from the end 6 of the pneumatic clamp 1, can move in the channel 9, so that the vacuum, that is to say the suction force at the orifice 3, is adjustable.
  • this alternative embodiment also provides for the mounting, near the suction orifice 3, of a detection element 18, for example an opto-electric sensor, in order to detect the presence of a wire 4 in the clamp.
  • a detection element 18 for example an opto-electric sensor
  • this device essentially consists of a pin 20 which can slide in front of the V-shaped cutout 5. It is clear that the movement of the pin 20 can be controlled in any way, for example by electromagnetic or pneumatic means.
  • the clamp can be provided with either a detection element 18, or a locking device 19, or both.
  • FIG. 5 represents a device 21 allowing, on a weaving machine, to detach from the threshing line 22 of the fabric 23, a weft thread 4 already beaten but having created, for example a false pick.
  • this device 21 consists of a movement mechanism 24 to which the wire clamp 1 is fixed, the assembly being constructed in such a way that the suction orifice 3 of the clamp can be presented to the threshing line 22.
  • the pneumatic pliers for thread 1 is brought close to the threshing line 22 in a plane parallel to the warp threads 25 forming the shed 26 of the weaving machine .
  • the pneumatic clamp for wire 1 and in particular the suction element 2, consists of a tubular structure of great finesse and that the end 6 is pointed so that the clamp 1 can be introduced without difficulty between the warp threads 25.
  • the movement mechanism can be executed in a similar manner to the movement mechanism for mechanical elements as described in the Dutch patent application 8602827.
  • FIGS. 6 to 8 illustrate a method according to which a beaten weft thread 4 can be detached from the threshing line or the tightening line of pick 22 using the wire clamp 1.
  • the clamp is first introduced into the shed 26 according to the movement indicated by the arrow 27 to be presented to the weft thread 4 concerned.
  • the clamp is then pneumatically actuated to suck up the weft thread 4 concerned, which will be detached from the fabric 23 during the return movement of the clamp for thread 1, as shown in FIG. 8.
  • Figures 9 and 10 give a schematic view of some other applications.
  • FIG. 9 represents a fabric 23 whose ends of picks 29, called ends, are retained, with a separation, by threads called selvedge threads 28.
  • the thread clamp 1 is presented in the interval between ordinary warp threads 25 and the selvedge threads 28 and can, as shown in FIG. 9, be used to detach the weft thread 4 at the height of the end 29, after which the weft thread 4 can be handled according to a known method, for example that described in the Dutch patent application 8602827 of the applicant.
  • a weft thread 4 is completely detached from the threshing line 22 by a step-by-step movement of the thread clamp 1, which performs, during each of its stops, a cycle of work as shown in FIGS. 6 to 8.
  • the step-by-step movement can, for example, be carried out according to the method described in the Dutch patent application 8602827, with the difference, however, that in this application, the detachment of the wire is carried out by mechanical means.
  • the present invention is in no way limited to the embodiments described by way of example and shown in the accompanying drawings; on the contrary, the pneumatic clamp for thread according to the invention, as well as the device intended for detaching, on weaving machines, a weft thread from the threshing line using such a clamp for thread, can be made in any shape without departing from the scope of the invention.

Abstract

The pneumatic clamp, e.g for a thread in a weaving machine, consists of a tubular suction element (2) with a closed tip (6) and a suction intake (3) which is able to interact with a single thread (4). A guide surface (5) directs the thread into position in front of the intake. The guide surface is in the form of a V-section recess, with the intake in the base of the V. the suction can be provided by a single suction channel inside the tubular element, or by two channels - one an air feed channel and the other a return channel shaped to create the suction at the intake orifice. The clamp can also be equipped with a sensor element to detect a thread in front of the intake.

Description

La présente invention a trait à une pince pneumatique pour fil.The present invention relates to a pneumatic wire gripper.

De même, la présente invention a trait à un dispositif destiné au détachement, sur une machine à tisser, d'un fil de trame de la ligne de battage à l'aide d'une telle pince pneumatique.Likewise, the present invention relates to a device intended for detaching, on a weaving machine, a weft thread from the threshing line using such a pneumatic clamp.

On sait qu'il existe déjà différentes méthodes et dispositifs destinés au détachement d'un fil de trame le long de la ligne de battage ou ligne de serrage de la duite. Les éléments détacheurs utilisés sur ces dispositifs sont essentiellement de nature mécanique et présentent l'inconvénient de soit, ne pas pincer le fil, soit pincer ou prendre plusieurs fils, ce qui compromet le bon fonctionnement du dispositif et risque d'endommager le tissu déjà constitué.We know that there are already different methods and devices intended for the detachment of a weft thread along the threshing line or tightening line of the pick. The detaching elements used on these devices are essentially mechanical in nature and have the disadvantage of either not pinching the wire, or pinching or picking up several wires, which compromises the proper functioning of the device and risks damaging the fabric already formed. .

La présente invention a trait à une pince pneumatique pour fil dont l'application exclut de manière systématique les inconvénients que l'on vient d'évoquer.The present invention relates to a pneumatic wire clamp whose application systematically excludes the drawbacks which have just been mentioned.

A cette fin, la pince pour fil selon l'invention est constituée essentiellement d'un élément d'aspiration pourvu d'au moins un orifice d'aspiration pouvant interagir avec un fil à tisser, ainsi que d'un dispositif guide-fil disposé autour de l'orifice d'aspiration.To this end, the wire clamp according to the invention essentially consists of a suction element provided with at least one suction orifice which can interact with a weaving thread, as well as a thread guide device arranged around the suction port.

Dans sa forme d'exécution préférentielle, la pince pour fil se compose d'un élément d'aspiration tubulaire dont l'une des extrémités axiales est fermée et dont l'autre extrémité est branchée à un système d'aspiration; sur cet élément d'aspiration, le dispositif guide-fil est constitué par une découpe en V aménagée dans la paroi latérale de l'élément tubulaire, l'orifice d'aspiration étant placé dans le fond de la découpe en V.In its preferred embodiment, the wire clamp consists of a tubular suction element, one of the axial ends of which is closed and the other end of which is connected to a suction system; on this suction element, the wire guide device is constituted by a V-shaped cutout arranged in the side wall of the tubular element, the suction orifice being placed in the bottom of the V-shaped cutout

Afin de mieux mettre en lumière les caractéristiques de l'invention, on trouvera ci-après, en guise d'exemples sans aucun caractère limitatif, la description de quelques formes d'exécution préférentielles, avec renvois aux dessins annexés dans lesquels:

  • la figure 1 représente une vue perspective agrandie d'une pince pneumatique pour fil selon l'invention;
  • la figure 2 représente une vue en coupe longitudinale de la pince;
  • les figures 3 et 4 représentent deux variantes de la figure 2, données selon une vue agrandie en coupe longitudinale;
  • la figure 5 représente une vue schématique d'un dispositif mettant en oeuvre une pince selon l'invention et destiné au détachement d'un fil de trame le long de la ligne de battage sur une machine à tisser;
  • les figures 6 à 8 représentent des vues schématiques d'une méthode selon laquelle un fil de trame peut être détaché, sur une machine à tisser, de la ligne de battage à l'aide d'une pince pneumatique selon l'invention;
  • les figures 9 et 10 représentent des vues schématiques de quelques applications de la pince pour fil selon l'invention.
In order to better highlight the characteristics of the invention, there will be found below, by way of examples without any limiting character, the description of some preferred embodiments, with references to the appended drawings in which:
  • FIG. 1 represents an enlarged perspective view of a pneumatic pliers for wire according to the invention;
  • FIG. 2 represents a view in longitudinal section of the clamp;
  • Figures 3 and 4 show two variants of Figure 2, given in an enlarged view in longitudinal section;
  • FIG. 5 represents a schematic view of a device implementing a clamp according to the invention and intended for the detachment of a weft thread along the threshing line on a weaving machine;
  • Figures 6 to 8 show schematic views of a method according to which a weft thread can be detached, on a weaving machine, from the threshing line using a pneumatic clamp according to the invention;
  • Figures 9 and 10 show schematic views of some applications of the wire clamp according to the invention.

Comme indiqué à la figure 1, la pince pneumatique pour fil 1 selon l'invention est principalement constituée d'un élément d'aspiration 2 pourvu, d'une part, d'au moins un orifice d'aspiration 3 qui peut interagir avec un et un seul fil 4 et, d'autre part, d'un dispositif guide-fil 5 jouxtant l'orifice d'aspiration 3.As indicated in FIG. 1, the pneumatic wire gripper 1 according to the invention mainly consists of a suction element 2 provided, on the one hand, with at least one suction orifice 3 which can interact with a and a single wire 4 and, on the other hand, a wire guide device 5 adjoining the suction orifice 3.

Dans cette exécution, l'élément d'aspiration 2 est formé par un simple élément tubulaire fermé à son extrémité inférieure 6, les dispositif guide-fil 5 étant formé d'une découpe en V et l'orifice d'aspiration 3 étant situé dans le fond 7 de la découpe en V.In this embodiment, the suction element 2 is formed by a simple tubular element closed at its lower end 6, the wire guide devices 5 being formed of a V-shaped cutout and the suction orifice 3 being located in the bottom 7 of the V-shaped cutout.

L'utilisation de ce dispositif apparaît clairement aux figures 1 et 2. Le dispositif lui-même est constitué essentiellement d'une pince pneumatique pour fil 1 qui est déplacée vers un fil 4; le dispositif guide-fil 5 amène automatiquement le fil jusqu'au fond 7 de la découpe en V, où le fil est retenu par l'orifice d'aspiration 3. Comme l'indique la figure 2, il est clair que l'orifice 3 sera complètement ou presque complètement bouché par la présence du fil 4, ce qui a pour avantage que la pince ne prendra jamais plus d'un fil à la fois.The use of this device is clearly shown in Figures 1 and 2. The device itself consists essentially of a pneumatic clamp for wire 1 which is moved towards a wire 4; the wire guide device 5 automatically feeds the wire to the bottom 7 of the V-shaped cutout, where the wire is retained by the suction opening 3. As shown in FIG. 2, it is clear that the opening 3 will be completely or almost completely blocked by the presence of the wire 4, which has the advantage that the clamp will never take more than one wire at a time.

La variante illustrée à la figure 3 fait appel à un élément d'aspiration 2 composé d'un canal d'amenée d'air 8, d'un canal d'évacuation d'air 9 et d'un mécanisme 10, placé dans le canal d'évacuation d'air et permettant de créer une dépression à hauteur de l'orifice d'aspiration 3. Le canal d'amenée d'air 8 communique par le bas avec le canal d'évacuation d'air 9. Pour produire la dépression, le mécanisme 10 crée un resserrement local 11, par exemple à l'aide d'un renflement de la paroi 12 en regard de l'orifice d'aspiration 3.The variant illustrated in FIG. 3 uses a suction element 2 composed of an air intake channel 8, an air evacuation channel 9 and a mechanism 10, placed in the air evacuation channel and making it possible to create a depression at the level of the suction orifice 3. The air supply channel 8 communicates from below with the air evacuation channel 9. To produce depression, the mechanism 10 creates a local tightening 11, for example by means of a bulge in the wall 12 opposite the suction orifice 3.

Le canal d'amenée d'air 8 peut recevoir un raccord d'air comprimé 13.The air supply channel 8 can receive a compressed air connection 13.

Le fonctionnement de la pince repose essentiellement sur le fait que le flux d'air 14 chassé par le raccord d'air comprimé 13 crée, à hauteur du resserrement 11, une dépression telle qu'elle engendre un flux d'air secondaire 15 provoquant un effet d'aspiration à travers l'orifice 3.The operation of the clamp essentially rests on the fact that the air flow 14 expelled by the compressed air connection 13 creates, at the level of the constriction 11, a depression such that it generates a secondary air flow 15 causing a suction effect through port 3.

La figure 4 représente une variante d'exécution dans laquelle le mécanisme 10 est formé par un corps sphérique ou piriforme 16 monté dans le canal d'évacuation d'air 9 et qui, entraîné par un dispositif à vis 17 commandé depuis l'extrémité 6 de la pince pneumatique 1, peut se déplacer dans le canal 9, de telle sorte que la dépression, c'est-à-dire la force d'aspiration à l'orifice 3, est réglable.FIG. 4 represents an alternative embodiment in which the mechanism 10 is formed by a spherical or piriform body 16 mounted in the air evacuation channel 9 and which, driven by a screw device 17 controlled from the end 6 of the pneumatic clamp 1, can move in the channel 9, so that the vacuum, that is to say the suction force at the orifice 3, is adjustable.

Par ailleurs, cette variante d'exécution prévoit également le montage, à proximité de l'orifice d'aspiration 3, d'un élément de détection 18, par exemple un capteur opto-électrique, afin de détecter la présence d'un fil 4 dans la pince. A proximité de l'orifice d'aspiration 3, on trouve encore un dispositif de verrouillage 19 empêchant qu'un fil, une fois aspiré, ne se détache de la pince. Dans la variante illustrée, ce dispositif consiste essentiellement en une goupille 20 pouvant coulisser devant la découpe en V 5. Il est clair que le mouvement de la goupille 20 peut être commandé de façon quelconque, par exemple par des moyens électromagnétiques ou pneumatiques.Furthermore, this alternative embodiment also provides for the mounting, near the suction orifice 3, of a detection element 18, for example an opto-electric sensor, in order to detect the presence of a wire 4 in the clamp. Near the suction orifice 3, there is also a locking device 19 preventing a wire, once aspirated, from coming off the clamp. In the illustrated variant, this device essentially consists of a pin 20 which can slide in front of the V-shaped cutout 5. It is clear that the movement of the pin 20 can be controlled in any way, for example by electromagnetic or pneumatic means.

Bien entendu, la pince peut être munie soit d'un élément de détection 18, soit d'un dispositif de verrouillage 19, soit des deux.Of course, the clamp can be provided with either a detection element 18, or a locking device 19, or both.

La figure 5 représente un dispositif 21 permettant, sur une machine à tisser, de détacher de la ligne de battage 22 du tissu 23, un fil de trame 4 déjà battu mais ayant créé, par exemple une fausse duite. Dans la variante d'exécution représentée, ce dispositif 21 se compose d'un mécanisme de déplacement 24 auquel est fixée la pince pour fil 1, l'ensemble étant construit de telle manière que l'orifice d'aspiration 3 de la pince puisse être présenté à la ligne de battage 22. Dans la forme d'exécution préférentielle, la pince pneumatique pour fil 1 est amenée à proximité de la ligne de battage 22 dans un plan parallèle aux fils de chaîne 25 formant la foule 26 de la machine à tisser. Il est dès lors clair que la pince pneumatique pour fil 1, et en particulier l'élément d'aspiration 2, consiste en une structure tubulaire de grande finesse et que l'extrémité 6 est appointée de sorte que la pince 1 puisse être introduite sans difficulté entre les fils de chaîne 25. Le mécanisme de déplacement peut être exécuté de manière similaire au mécanisme de déplacement pour éléments mécaniques comme décrit dans la demande néerlandaise de brevet 8602827.FIG. 5 represents a device 21 allowing, on a weaving machine, to detach from the threshing line 22 of the fabric 23, a weft thread 4 already beaten but having created, for example a false pick. In the variant shown, this device 21 consists of a movement mechanism 24 to which the wire clamp 1 is fixed, the assembly being constructed in such a way that the suction orifice 3 of the clamp can be presented to the threshing line 22. In the preferred embodiment, the pneumatic pliers for thread 1 is brought close to the threshing line 22 in a plane parallel to the warp threads 25 forming the shed 26 of the weaving machine . It is therefore clear that the pneumatic clamp for wire 1, and in particular the suction element 2, consists of a tubular structure of great finesse and that the end 6 is pointed so that the clamp 1 can be introduced without difficulty between the warp threads 25. The movement mechanism can be executed in a similar manner to the movement mechanism for mechanical elements as described in the Dutch patent application 8602827.

Les figures 6 à 8 illustrent une méthode selon laquelle un fil de trame battu 4 peut être détaché de la ligne de battage ou de la ligne de serrage de la duite 22 à l'aide de la pince pour fil 1. Dans la variante illustrée, la pince est tout d'abord introduite dans la foule 26 selon le mouvement indiqué par la flèche 27 pour être présentée au fil de trame 4 concerné.FIGS. 6 to 8 illustrate a method according to which a beaten weft thread 4 can be detached from the threshing line or the tightening line of pick 22 using the wire clamp 1. In the variant illustrated, the clamp is first introduced into the shed 26 according to the movement indicated by the arrow 27 to be presented to the weft thread 4 concerned.

Comme indiqué à la figure 7, la pince est ensuite actionnée pneumatiquement pour aspirer le fil de trame 4 concerné, qui sera détaché du tissu 23 lors du mouvement de retour de la pince pour fil 1, comme indiqué à la figure 8.As indicated in FIG. 7, the clamp is then pneumatically actuated to suck up the weft thread 4 concerned, which will be detached from the fabric 23 during the return movement of the clamp for thread 1, as shown in FIG. 8.

Il est clair que, dans le cas où l'on recourt à un dispositif de verrouillage 19, celui-ci ne sera actionné qu'après que le fil de trame 4 aura été détaché de la ligne de battage 22.It is clear that, in the case where a locking device 19 is used, it will not be actuated until after the weft thread 4 has been detached from the threshing line 22.

Les figures 9 et 10 donnent une vue schématique de quelques autres applications.Figures 9 and 10 give a schematic view of some other applications.

La figure 9 représente un tissu 23 dont les extrémités des duites 29, appelées bouts, sont retenues, avec une séparation, par des fils appelés fils de lisière 28. La pince pour fil 1 est présentée dans l'intervalle entre les fils de chaîne ordinaires 25 et les fils de lisière 28 et peut, comme indiqué à la figure 9, être mise en oeuvre pour détacher le fil de trame 4 à hauteur du bout 29, suite à quoi le fil de trame 4 peut être manipulé selon une méthode connue, par exemple celle décrite dans la demande néerlandaise de brevet 8602827 de la demanderesse.FIG. 9 represents a fabric 23 whose ends of picks 29, called ends, are retained, with a separation, by threads called selvedge threads 28. The thread clamp 1 is presented in the interval between ordinary warp threads 25 and the selvedge threads 28 and can, as shown in FIG. 9, be used to detach the weft thread 4 at the height of the end 29, after which the weft thread 4 can be handled according to a known method, for example that described in the Dutch patent application 8602827 of the applicant.

Dans le schéma de la figure 10, un fil de trame 4 est détaché entièrement de la ligne de battage 22 par un déplacement pas-à-pas de la pince pour fil 1, qui effectue, lors de chacun de ses arrêts, un cycle de travail tel que représenté aux figures 6 à 8. Le déplacement pas-à-pas peut, par exemple, être effectué selon la méthode décrite dans la demande néerlandaise de brevet 8602827, avec cette différence cependant que, dans cette demande, le détachement du fil s'effectue par des moyens mécaniques.In the diagram of FIG. 10, a weft thread 4 is completely detached from the threshing line 22 by a step-by-step movement of the thread clamp 1, which performs, during each of its stops, a cycle of work as shown in FIGS. 6 to 8. The step-by-step movement can, for example, be carried out according to the method described in the Dutch patent application 8602827, with the difference, however, that in this application, the detachment of the wire is carried out by mechanical means.

La présente invention ne se limite nullement aux formes d'exécution décrites à titre d'exemple et représentées dans les dessins annexés; au contraire, la pince pneumatique pour fil selon l'invention, ainsi que le dispositif destiné à détacher, sur les machine à tisser, un fil de trame de la ligne de battage à l'aide d'une telle pince pour fil, peuvent être réalisés dans des formes quelconques sans sortir du cadre de l'invention.The present invention is in no way limited to the embodiments described by way of example and shown in the accompanying drawings; on the contrary, the pneumatic clamp for thread according to the invention, as well as the device intended for detaching, on weaving machines, a weft thread from the threshing line using such a clamp for thread, can be made in any shape without departing from the scope of the invention.

Claims (14)

1. Pince pneumatique pour fil caractérisée par le fait qu'elle est constituée essentiellement d'un élément d'aspiration (2) pourvu d'au moins un orifice d'aspiration (3), pouvant interagir avec un et un seul fil (4), et d'un dispositif guide-fil (5) capable d'amener le fil (4) devant l'orifice d'aspiration (3).1. Pneumatic wire gripper characterized by the fact that it essentially consists of a suction element (2) provided with at least one suction orifice (3), which can interact with one and only one wire (4 ), and a wire guide device (5) capable of bringing the wire (4) in front of the suction orifice (3). 2. Pince pneumatique pour fil selon la revendication 1, caractérisée par le fait que l'élément d'aspiration (2) est exécuté essentiellement selon une construction tubulaire et qu'une de ses extrémités (6) est fermée, le dispositif guide-fil (5) étant aménagé dans la paroi latérale de la pince pour fil (1).2. Pneumatic wire gripper according to claim 1, characterized in that the suction element (2) is executed essentially in a tubular construction and that one of its ends (6) is closed, the wire guide device (5) being arranged in the side wall of the wire clamp (1). 3. Pince pneumatique pour fil selon la revendication 1 ou 2, caractérisée par le fait que le dispositif guide-fil (5) est constitué d'une découpe en V, l'orifice d'aspiration (3) étant situé dans le fond (7) de la découpe en V.3. Pneumatic wire clamp according to claim 1 or 2, characterized in that the wire guide device (5) consists of a V-shaped cutout, the suction orifice (3) being located in the bottom ( 7) V-cut. 4. Pince pneumatique pour fil selon l'une des revendications précédentes, caractérisée par le fait que l'élément d'aspiration (2) est constitué par un canal d'aspiration simple dans lequel donne l'orifice d'aspiration (3).4. Pneumatic wire clamp according to one of the preceding claims, characterized in that the suction element (2) is constituted by a simple suction channel in which gives the suction orifice (3). 5. Pince pneumatique pour fil selon l'une des revendications 1 à 3, caractérisée par le fait que l'élément d'aspiration (2) est constitué principalement par un canal d'amenée d'air (8), par un canal d'évacuation d'air (9) dans lequel donne l'orifice d'aspiration (3) et par un mécanisme (10) destiné à créer une dépression à l'orifice d'aspiration (3).5. Pneumatic wire clamp according to one of claims 1 to 3, characterized in that the suction element (2) consists mainly of an air intake channel (8), by a d 'air evacuation (9) in which gives the suction port (3) and by a mechanism (10) intended to create a vacuum at the suction port (3). 6. Pince pneumatique pour fil selon la revendication 5, caractérisée par le fait que le mécanisme (10) destiné à créer une dépression à l'orifice d'aspiration (3) est constitué essentiellement par un resserrement local (11) dans le canal d'évacuation d'air (9) à hauteur de l'orifice d'aspiration (3).6. Pneumatic wire clamp according to claim 5, characterized in that the mechanism (10) intended to create a vacuum at the suction orifice (3) consists essentially of a local constriction (11) in the channel d exhaust air (9) at the level of the suction opening (3). 7. Pince pneumatique pour fil selon la revendication 6, caractérisée par le fait que le resserrement (11) est créé par un renflement de la paroi (12) en regard de l'orifice d'aspiration (3).7. Pneumatic wire clamp according to claim 6, characterized in that the constriction (11) is created by a bulge in the wall (12) opposite the suction orifice (3). 8. Pince pneumatique pour fil selon la revendication 6, caractérisée par le fait que le resserrement local (11) est créé par un corps sphérique ou piriforme (16) placé dans le canal d'évacuation d'air (9) à hauteur de l'orifice d'aspiration (3).8. Pneumatic wire clamp according to claim 6, characterized in that the local constriction (11) is created by a spherical or piriform body (16) placed in the air evacuation channel (9) at the height of l 'suction port (3). 9. Pince pneumatique pour fil selon la revendication 8, caractérisée par le fait que le mécanisme (10) est muni d'un dispositif à vis (17) permettant de déplacer le corps sphérique ou piriforme (16) dans le canal d'évacuation d'air (9).9. Pneumatic wire clamp according to claim 8, characterized in that the mechanism (10) is provided with a screw device (17) making it possible to move the spherical or piriform body (16) in the evacuation channel d 'air (9). 10. Pince pneumatique pour fil selon l'une des revendications précédentes, caractérisée par le fait qu'elle est pourvue d'un élément de détection (18) permettant de détecter la présence d'un fil une fois qu'il est pris.10. Pneumatic wire clamp according to one of the preceding claims, characterized in that it is provided with a detection element (18) for detecting the presence of a wire once it is taken. 11. Pince pneumatique pour fil selon l'une des revendications précédentes, caractérisée par le fait qu'elle est pourvue d'un dispositif de verrouillage (19) permettant de retenir le fil pris par la pince pour fil (1).11. Pneumatic wire clamp according to one of the preceding claims, characterized in that it is provided with a locking device (19) for retaining the wire taken by the wire clamp (1). 12. Pince pneumatique pour fil selon la revendication 11, caractérisée par le fait que le dispositif de verrouillage (19) est formé par une goupille (20) pouvant se déplacer dans le découpe (5).12. Pneumatic wire clamp according to claim 11, characterized in that the locking device (19) is formed by a pin (20) which can move in the cutout (5). 13. Dispositif destiné au détachement, sur une machine à tisser, d'un fil de trame de la foule et faisant appel à une pince pour fil (1) selon l'une des revendications précédentes, caratérisé par le fait qu'il est constitué essentiellement d'une pince pour fil (1) et d'un mécanisme de déplacement (24) par l'action duquel la pince pour fil (1) peut être présentée à la ligne de battage (22) et être écartée de celle-ci.13. Device intended for the detachment, on a weaving machine, of a weft thread from the crowd and using a thread clamp (1) according to one of the preceding claims, characterized in that it is constituted essentially a wire clamp (1) and a displacement mechanism (24) by the action of which the wire clamp (1) can be presented to the threshing line (22) and be moved away from it . 14. Dispositif selon la revendication 13, caractérisé par le fait qu'il est monté à proximité des bouts de tissu (29) sur la machine à tisser, et destiné au détachement desdits bouts.14. Device according to claim 13, characterized in that it is mounted near the ends of fabric (29) on the weaving machine, and intended for detaching said ends.
EP19880201571 1987-07-28 1988-07-20 Pneumatic thread clamp and device for detaching a weft thread from the beat-up line on weaving looms with such a clamp Expired - Lifetime EP0309012B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8700834A BE1000791A4 (en) 1987-07-28 1987-07-28 Pneumatic wire clamp and device for looms for an impact of attack line wire cutting out that applying such wire clip.
BE8700834 1987-07-28

Publications (2)

Publication Number Publication Date
EP0309012A1 true EP0309012A1 (en) 1989-03-29
EP0309012B1 EP0309012B1 (en) 1991-11-27

Family

ID=3882788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880201571 Expired - Lifetime EP0309012B1 (en) 1987-07-28 1988-07-20 Pneumatic thread clamp and device for detaching a weft thread from the beat-up line on weaving looms with such a clamp

Country Status (3)

Country Link
EP (1) EP0309012B1 (en)
BE (1) BE1000791A4 (en)
DE (1) DE3866492D1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0336388A2 (en) * 1988-04-06 1989-10-11 Tsudakoma Corporation Weft yarn extracting device
EP0458736A1 (en) * 1990-05-21 1991-11-27 Gebrüder Sulzer Aktiengesellschaft Weft breakage repair in dummy shuttle looms

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954490C (en) * 1951-09-07 1956-12-20 Reiners Walter Dr Ing Suction tube with a closing flap for gripping and holding thread ends on winding machines, in particular automatic winding machines
DE3517117A1 (en) * 1985-05-11 1986-11-13 Georg Sahm GmbH & Co KG, 3440 Eschwege Suction gun for monofilaments, tapes and other threads

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954490C (en) * 1951-09-07 1956-12-20 Reiners Walter Dr Ing Suction tube with a closing flap for gripping and holding thread ends on winding machines, in particular automatic winding machines
DE3517117A1 (en) * 1985-05-11 1986-11-13 Georg Sahm GmbH & Co KG, 3440 Eschwege Suction gun for monofilaments, tapes and other threads

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0336388A2 (en) * 1988-04-06 1989-10-11 Tsudakoma Corporation Weft yarn extracting device
EP0336388A3 (en) * 1988-04-06 1991-11-27 Tsudakoma Corporation Weft yarn extracting device
EP0458736A1 (en) * 1990-05-21 1991-11-27 Gebrüder Sulzer Aktiengesellschaft Weft breakage repair in dummy shuttle looms
US5158120A (en) * 1990-05-21 1992-10-27 Sulzer Brothers Limited Clearing a weft yarn break in a loom

Also Published As

Publication number Publication date
DE3866492D1 (en) 1992-01-09
EP0309012B1 (en) 1991-11-27
BE1000791A4 (en) 1989-04-04

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