EP0276206B1 - Tringle de contact pour casse-fils electriques - Google Patents

Tringle de contact pour casse-fils electriques Download PDF

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Publication number
EP0276206B1
EP0276206B1 EP86904064A EP86904064A EP0276206B1 EP 0276206 B1 EP0276206 B1 EP 0276206B1 EP 86904064 A EP86904064 A EP 86904064A EP 86904064 A EP86904064 A EP 86904064A EP 0276206 B1 EP0276206 B1 EP 0276206B1
Authority
EP
European Patent Office
Prior art keywords
rail
contact
insulating member
disposed
bars
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP86904064A
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German (de)
English (en)
Other versions
EP0276206A1 (fr
Inventor
Ernst Steiner
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.)
Grob and Co AG
Original Assignee
Grob and Co AG
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 Grob and Co AG filed Critical Grob and Co AG
Publication of EP0276206A1 publication Critical patent/EP0276206A1/fr
Application granted granted Critical
Publication of EP0276206B1 publication Critical patent/EP0276206B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/18—Automatic stop motions
    • D03D51/20—Warp stop motions
    • D03D51/28—Warp stop motions electrical
    • D03D51/30—Warp stop motions electrical wherein droppers are suspended on individual warp threads or small groups of threads

Definitions

  • the invention relates to a contact rail for an electrical thread monitor of a textile machine, with two mutually parallel and mutually insulated, electrically conductive rails, which together extend through the slots of a plurality of monitor slats arranged on the threads and through one with thread breakage with the two rails in Contact coming guard slat to be electrically conductive to trigger a machine stop.
  • this device is called a warp thread monitor.
  • the upper edge of the inner rail is serrated by forming rectangular punched-out sections, so that a guard lamella falling in the event of a broken warp thread is caught in a punched-out section and by a back and forth movement of the contact rail or only the inner rail is taken along by means of a lever provided for this on the warp thread monitor, so that when the monitor slat is laterally displaced in this way, an alley is formed between the other monitor slats, which makes it easier to find the broken warp thread.
  • the object underlying the present invention was to design a contact rail for a thread monitor in such a way that it is possible to localize a thread break without having to search for the long contact rails after the fallen guard slat and with considerably less time, which reduces the downtimes of the machine and productivity is increased. Furthermore, it is also the solution to the task of monitoring weaving machines with regard to thread breaks by registering the frequency and local distribution of thread breaks, storing them as data and evaluating them centrally for a wide variety of purposes.
  • a fairly precise localization of the broken thread or the fallen guard lamella can be carried out electrically by determining the distance between the guard lamella falling on the contact rail and one of the two ends of the contact rail. It is known that a line break or short circuit can be located in an electrical conductor pair according to the principle of the electrical measuring bridge.
  • a solid rail as in the present case the inner rail of the contact rail, is of course unsuitable for tapping resistors for the purpose of using the principle of the electrical measuring bridge.
  • an electrical conductor is required which has a resistance which is substantially higher than that of the usual rails and which has a linearly increasing resistance curve over the length of the rail.
  • a thin wire that fulfills this condition is, however, completely unsuitable as an electrical conductor in the function of the inner rail of the contact rail used in a thread monitor, because a wire that is sufficiently high and suitable for the measurement method and is correspondingly thin is suitable for the rough operation in a weaving mill and the like would not withstand stress from the guard slats.
  • the fallen guard slat comes into contact with the inner rail and the outer rail of the contact rail in order to trigger a machine stop.
  • the inner rail as well as the outer rail are therefore suitable for carrying out the aforementioned method according to the principle of the electrical measuring bridge.
  • the contact rail of the type mentioned has the features according to claim 1.
  • a rail with these properties, which make it possible to tap a resistance as a measurable value at any point along the rail, can be designed in very different ways.
  • An electrical conductor applied to an insulating material body can be a band-shaped material applied in a special form to the insulating material body, which is applied, for example, as a coil, but it can also have a different configuration, such as a meandering shape, or the electrical conductor can be in the form of a Coating can be applied to an insulating material body, for example it can be vapor-deposited or applied galvanically or plated, etc. All of the exemplary embodiments involve bringing an electrical conductor with an electrical resistance that is substantially higher than that of a conventional rail into a rail shape with sufficient robustness and stability with regard to the mechanical stress.
  • the inner rail of the contact rail which is held in the known thread monitors in a cross-sectionally U-shaped outer rail and which itself has a rectangular cross-section, so that an electrical conductor is expediently applied to a cross-section-shaped insulating material body.
  • this consists of a metal conductor helix which is wound tightly but without touching the turns on the insulating material body.
  • a contact rail 1 is also used in known thread monitors, which extends through the slot 2 of a monitor plate 3 and is shown broken off there.
  • a thread 5 for example a warp thread, extends through the thread eye 4 of the guard plate 3, and in the event of a thread break, the guard plate 3 falls onto the contact rail 1.
  • the contact rail 1 consists of an outer rail 6 with a groove 7 on the upper edge, in which the inner rail 9 is held separately by an insulating material layer 8.
  • the cross section according to FIG. 2 on a larger scale shows the structure more clearly.
  • the outer rail 6 and the inner rail 9 are live and are electrically connected by a falling guard lamella 3, so that a machine stop is triggered if the thread breaks.
  • the functional principle of the contact rail according to FIGS. 1 and 2 applies to all embodiments according to the invention according to FIGS. 3-15. Details that cannot be seen in FIGS. 1 and 2 relate to the different embodiments of the inner rail. In the embodiment according to FIGS.
  • a metal conductor helix 11 is wound onto an insulating material body 10 which has a cuboid cross-section in such a way that the turns do not touch while maintaining a very small distance.
  • the metal coil 11 is formed by winding a strip material, which is preferably made of chromium-nickel steel and has a cross section that is constant over the length.
  • the strip material itself is considerably longer than an inner rail 12 created by the winding of the strip material on the insulating material body 10.
  • An inner rail designed in this way now has a much higher electrical resistance, for example between 20 and 100 ohms, than a solid rail having the same length the electrical resistance is almost zero.
  • the inner rail 12 which is flat overall in cross section, consists of the insulating material body 10 and the metal conductor helix 11 and is held in the outer rail 13 which is U-shaped in cross section in the upper part, an insulating material layer 14 being arranged between the inner rail 12 and the outer rail 13.
  • the distance between the turns of the metal conductor helix 11 is smaller than the material thickness of the guard lamella 3, so that it is ensured that a guard lamella 3 which has fallen when the thread breaks always makes electrical contact between the metal conductor helix 11 and the outer rail 13.
  • the inner rail 12 having the metal conductor helix 11 and the outer rail 13 are known to form conductors in an electrical circuit, which is closed by the guard lamella 3 which establishes an electrical connection between the inner rail 12 and the outer rail 13, as a result of which the loom is stopped.
  • a modified embodiment of the inner rail 15 consists of an insulating material body 16 and an electrically conductive coating 17 applied to this body, which is very thin in order to achieve a high resistance value suitable for the measurement method mentioned and is, for example, vapor-deposited or galvanically applied.
  • a coating can also be rolled on or plated on. It does not have to cover the entire surface.
  • An inner rail 19 shown in FIG. 6 consists of an insulating material body 20, on the oblique surfaces 21 extending on the upper longitudinal edge, narrow electrical conductors 22 are applied, which extend over the entire length of the rail and come into contact with a fallen guard lamella 3.
  • An inner rail 23 shown in FIG. 7 consists of an insulating material body 24 and a grid-shaped braid 25 applied to this body and formed from electrical conductors.
  • an inner rail 26 consists of a flat insulating material body 27, which on one of its two longitudinal sides, which does not come into contact with a fallen guard slat 3, has a thin conductor track 28 which extends over the rail length and which is located at a point protected against mechanical stress and has the electrical resistance suitable for the measuring method and can be tapped at any point along the rail as a measurable value.
  • This electrical conductor track 28 is connected to contact bodies 29 arranged on the upper longitudinal edge of the insulating material body 27 in a tight row one behind the other but at a small distance from one another, in each case via an electrical conductor 30, these contact bodies 29 having a greater material thickness and encompassing the upper edge of the insulating material body Resist occurring mechanical stress, so that the conductor track 28 used for the measurement method can be made very thin.
  • the contact bodies 29 are delimited by inclined surfaces similar to the helical helix, so that contact with a guard plate is always ensured. This can be seen from the side view of the rail 26 according to FIG. 9 and the top view according to FIG. 10.
  • a further embodiment of an inner rail 33 shown in FIGS. 11-14 consists of an insulating material body 34, on which an electrical conductor track 35 with a constant cross section and with a linear course in the longitudinal and transverse direction of the rail is applied.
  • a course of the conductor track that is linear in the longitudinal and transverse direction of the rail is also present in the metal conductor helix 11 according to FIG. 3.
  • Such a course of the conductor track is also present in the embodiment of the rail 33 according to FIGS. 11-14 when the conductor track is designed in a meandering shape. The objective is always the same, namely to accommodate a large length of the conductor track on a certain length of rail.
  • the electrical conductor track in a meandering shape extends around the insulating material body 34 with the exception of the lower side surface, as can also be seen from the side view according to FIG. 12.
  • a development of the rail surface with the conductor track is shown in FIG. 14, in which it can also be seen that the conductor track in each case runs obliquely at the upper edge of the rail that comes into contact with the guard plate, which is also apparent from the top view of the rail according to FIG. 13 , and for the reason already mentioned, to ensure contact with a guard slat at any point along the rail.
  • FIG. 15 schematically shows the principle of the method which can be carried out using a contact rail according to the invention for locating a guard slat which has fallen onto the contact rail in the event of a thread break.
  • the contact rail 1 has one of the embodiments shown in FIGS. 3-14.
  • FIGS. 3-14 There are also shown a number of guard slats 3, which are actually lined up very close to one another on the contact rail, the contact bar 1 extending through the slots 2 of the guard slats 3, as is also shown in FIG. 1.
  • a warp thread 5 extends through the thread eye 4 of each guard slat 3, on each of which a guard slat hangs.
  • a guard slat shown in the middle in FIG. 15 has fallen onto the contact rail 1 as a result of thread breakage.
  • This fallen guard slat is to be located on a contact rail several meters long with a very large number of guard slats. Since the inner rail of the contact rail has, as described above, an electrical resistance that increases linearly over its length and can be tapped at any point along the rail as a measurable value, a resistance ratio between the resistance of the one that extends over the entire rail length can be measured according to the principle of the electrical measuring bridge Determine the electrical conductor of the inner rail and the resistance of the partial length of this electrical conductor from one end of the rail to the fallen guard slat. 15, the total rail length 1 has a resistance R, and the partial length 1 has a resistance Ri. The principle of the electrical measuring bridge used for determining the resistance ratio is known. In the diagram according to FIG.
  • a bridge feed 40 is electrically connected to the inner rail of the contact rail 1.
  • 41 is a "sample and hold" amplifier
  • 43 is an amplifier
  • 44 is an A / D converter
  • 45 the display device.
  • This shows a digital display, whereby a value can be read as a length dimension for the distance 1 between the rail end and the fallen guard slat.
  • the weaving machine is stopped by a falling guard slat.
  • a relay 46 arranged behind the amplifier 43 actuates the switch 47 to stop the loom.
  • the digitized data already available for the display can be forwarded by the A / D converter 44 to a data processing system via a serial interface 48.
  • a serial interface 48 There, for example, the data of a group of weaving machines with warp thread monitoring devices are collected in order to evaluate them with regard to the frequency of thread breaks, where these occur, etc.
  • the advantages resulting from these possibilities in terms of work technology and economics are just as important as the quick detection of a thread break.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Installation Of Bus-Bars (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

Une des glissières d'une glissière de contact, la glissière intérieure (12) de préférence, est pourvue sur toute sa longueur d'une résistance électrique linéairement croissante et saisissable à n'importe quel point le long de la glissière en tant que valeur mesurable. Un mode préférentiel de réalisation présente à cet effet un conducteur métallique (11) enroulé en spirale autour d'un corps en matériau isolant (10). Ce type de glissière intérieure (12) est retenue dans une glissière extérieure (13) dont la section transversale supérieure est en forme de U, la glissière intérieure (12) étant séparée de la glissière extérieure (13) par une couche de matériau isolant (14). Le conducteur métallique enroulé en spirale (11) présente une résistance électrique considérablement plus élevée que celle d'une glissière massive, appropriée pour appliquer une méthode de mesure selon le principe du pont de Wheatstone afin de localiser une lamelle tombée sur la glissière de contact en cas de rupture du fil. La distance entre la lamelle tombée et une extrémité de la glissière peut être déduite du rapport entre la résistance de l'ensemble de la glissière intérieure (12) et la résistance du segment de la glissière intérieure compris entre une extrémité de la glissière et la lamelle tombée, ce rapport étant déterminé électriquement par le pont de Wheatstone.

Claims (14)

1. Tringle de contact pour casse-fils électriques d'une machine textile, avec deux tringles électriquement conductrices, parallèles l'une à l'autre et isolées l'une de l'autre, qui s'étendent en commun à travers les fentes d'un certain nombre de lamelles de casse-fil disposées sur les fils et se trouvent reliées de manière électriquement conductrice par une lamelle de casse-fil venant en contact avec les deux tringles lors d'une rupture du fil, en vue d'un déclenchement d'un arrêt de la machine, caractérisée en ce que l'une des tringles présente un conducteur électrique en un matériau homogène disposé sur un corps en un matériau isolant, qui possède une résistance électrique augmentant linéairement sur la longueur de la tringle et pouvant être saisie en tout point souhaité le long de la tringle en tant que valeur mesurable.
2. Tringle de contact selon la revendication 1, caractérisée en ce qu'une piste conductive électrique (11, 35) d'une section transversale constante et d'une longueur sensiblement plus grande que la longueur de la tringle est disposée sur un corps en un matériau isolant (10, 34) avec un tracé linéaire continu aussi bien en direction longitudinale de la tringle qu'en direction transversale.
3. Tringle de contact selon la revendication 2, caractérisée en ce que la piste conductive prévue sur un corps en un matériau isolant (10), avec un tracé linéaire aussi bien en direction longitudinale de la tringle qu'en direction transversale, forme une spirale (11).
4. Tringle de contact selon la revendication 2, caractérisée en ce que la piste conductive prévue sur un corps en un matériau isolant (34), avec un tracé linéaire continu aussi bien en direction longitudinale de la tringle qu'en direction transversale, présente une forme de méandre (35).
5. Tringle de contact selon la revendication 2 ou, caractérisée en ce que la tringle interne (12, 15, 19, 23, 26, 33) présente le conducteur électrique (11, 17, 22, 25, 28, 29, 35) prévu sur un corps en un matériau isolant (10,16, 20, 24, 27,34).
6. Tringle de contact selon la revendication 3 et 5, caractérisée en ce que la tringle interne (12) se compose d'un corps plat (10) en un matériau isolant et d'une spirale conductrice en métal (11) qui y est disposée, et qui présente une section transversale constante, dont les spires ne se touchent pas.
7. Tringle de contact selon la revendication 6, caractérisée en ce que la spirale conductrice en métal (11) est en un matériau en bande.
8. Tringle de contact selon la revendication 7, caractérisée en ce que le matériau en bande de la spirale conductrice en métal (11) se compose d'un acier au chrome-nickel.
9. Tringle de contact selon la revendication 6, caractérisée en ce que la spirale conductrice en métal plate rubanée (11) est fixée dans une rainure d'un rail externe (13) de section transversale en forme de U, et y est avantageusement collée.
10. Tringle de contact selon la revendication 1, caractérisée en ce que l'une des tringles (15) présente une enduction (17) électriquement conductrice sur un corps en un matériau isolant (16), par exemple une enduction par métallisation sous vide ou galvanisation ou application au rouleau ou placage.
11. Tringle de contact selon la revendication 1, caractérisée en ce que l'une des tringles (19) présente, sur un corps (20) en un matériau isolant, des conducteurs électriques (22) prévus sur des surfaces électriques (21) s'étendant des deux côtés de son arête longitudinale supérieure.
12. Tringle de contact selon la revendication 1, caractérisée en ce que l'une des tringles (23) présente un treillis (25) en forme de grillage, formé de conducteurs électriques, qui est disposé sur un support en un matériau isolant (24).
13. Tringle de contact selon la revendication 1, caractérisée en ce que l'une des tringles (26) présente une piste conductive électrique (28) disposée sur un corps en matériau isolant (27) d'un côté longitudinal ne venant pas en contact avec la lamelle (3) de casse-fil, laquelle piste possède en tout point souhaité le long de la tringle une résistance électrique pouvant être saisie en tant que valeur mesurable et sur le bord longitudinal supérieur du corps en matériau isolant un certain nombre de corps de contact disposés en rangées (29) à une certaine distance les uns des autres, avec des épaisseurs assez importantes vis-à-vis de la piste conductive (28) lesquels sont individuellement reliés électriquement (30) à la piste conductive électrique (28).
14. Utilisation de la tringle de contact selon l'une des revendications 1 à 13, caractérisée en ce que pour trouver la position de la lamelle de casse-fil venant en contact avec les deux rails lors d'une rupture de fil, le rapport de résistance de la résistance de la longueur totale à la résistance de la longueur partielle de la tringle d'une extrémité de la tringle jusqu'à la lamelle de casse-fit se trouvant en contact avec la tringle est obtenu et est indiqué en tant que valeur de mesure de distance.
EP86904064A 1986-07-22 1986-07-22 Tringle de contact pour casse-fils electriques Expired EP0276206B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH1986/000102 WO1988000626A1 (fr) 1986-07-22 1986-07-22 Glissiere de contact pour arrets de fils electriques

Publications (2)

Publication Number Publication Date
EP0276206A1 EP0276206A1 (fr) 1988-08-03
EP0276206B1 true EP0276206B1 (fr) 1989-12-27

Family

ID=4543036

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86904064A Expired EP0276206B1 (fr) 1986-07-22 1986-07-22 Tringle de contact pour casse-fils electriques

Country Status (6)

Country Link
US (1) US4838320A (fr)
EP (1) EP0276206B1 (fr)
JP (1) JPH01500446A (fr)
DE (1) DE3667803D1 (fr)
SU (1) SU1650015A3 (fr)
WO (1) WO1988000626A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3711597C1 (de) * 1987-04-07 1988-06-01 Grob & Co Ag Kontaktschiene fuer einen elektrischen Fadenwaechter
JP2608742B2 (ja) * 1987-05-26 1997-05-14 津田駒工業株式会社 織機の経糸切れ検出表示装置
IT1271129B (it) * 1994-11-30 1997-05-26 Actex Spa Rango per guardiaordito in telai tessili con indicazione automatica della zona interessata dalla rottura del filo
DE502004003951D1 (de) * 2004-05-19 2007-07-12 Groz Beckert Kg Kettfadenwächter für Webmaschine
JP7375664B2 (ja) * 2020-04-20 2023-11-08 株式会社豊田自動織機 織機の経糸切れ位置検出装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL292257A (fr) * 1962-07-11
CH428612A (fr) * 1965-03-01 1967-01-15 Dubois Maurice Casse-chaîne électrique
US3324899A (en) * 1965-09-13 1967-06-13 Jr Fred H Stagg Bar check device
US3725911A (en) * 1971-12-15 1973-04-03 Batson Cook Co Stop motion device with selective indicator
CH636387A5 (de) * 1979-04-25 1983-05-31 Sulzer Ag Kettfadenwaechtereinrichtung fuer eine webmaschine.
DE3210333C2 (de) * 1982-03-20 1986-04-17 Lindauer Dornier Gmbh, 8990 Lindau Einrichtung zur elektrischen Kettfadenüberwachung
JPS6175848A (ja) * 1984-09-19 1986-04-18 株式会社豊田自動織機製作所 織機における経糸切断検出装置

Also Published As

Publication number Publication date
JPH01500446A (ja) 1989-02-16
WO1988000626A1 (fr) 1988-01-28
DE3667803D1 (de) 1990-02-01
EP0276206A1 (fr) 1988-08-03
SU1650015A3 (ru) 1991-05-15
US4838320A (en) 1989-06-13

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