EP0276206A1 - Tringle de contact pour casse-fils electriques. - Google Patents

Tringle de contact pour casse-fils electriques.

Info

Publication number
EP0276206A1
EP0276206A1 EP86904064A EP86904064A EP0276206A1 EP 0276206 A1 EP0276206 A1 EP 0276206A1 EP 86904064 A EP86904064 A EP 86904064A EP 86904064 A EP86904064 A EP 86904064A EP 0276206 A1 EP0276206 A1 EP 0276206A1
Authority
EP
European Patent Office
Prior art keywords
contact
rail
rails
rail according
contact rail
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.)
Granted
Application number
EP86904064A
Other languages
German (de)
English (en)
Other versions
EP0276206B1 (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

Links

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 guardians 1 amel 1 e 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 movement of the contact rail, or only the inner rail by means of dedicated to the warp stop motion lever mitgenom ⁇ men is such that when the laterally strigo ⁇ in this manner surrounded Wumbleter1 e- amel 1 e 'ne alley between the other Wambater1 amel 1 en arises, which makes it easier to find the broken warp thread.
  • Warp thread monitors therefore have contact rails that are several meters long, a plurality of which are arranged in parallel next to one another in a warp thread monitor and on which many hundreds of monitor slats are lined up and carried by the warp threads.
  • this is done, as already mentioned, by longitudinally displacing the contact rails and thereby forming a small alley, the presence of which can be determined by searching on any of the plurality of contact rails.
  • 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 laboriously searching the long contact rail ' n for the fallen monitor slat and with considerably less time, thereby reducing the downtimes the machine can be reduced and productivity 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 is possible by determining the distance between the guard dropped on the contact rail! amel! e and one of the two contact rail ends can be carried out electrically. 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. However, 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. For the inner rail coming into contact with the guard slats, 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 fulfilling 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 which is sufficiently high and suitable for the measuring method and which is correspondingly thin for rough operation in a weaving mill and would not be able to withstand the demands of the watchmen1 amel 1 en.
  • the fallen watchdog 1 comes in contact with the inner rail and the outer rail of the contact rail in order to trigger a machine plug.
  • the inner rail is just as suitable for carrying out the above-mentioned method according to the principle of the electrical measuring bridge, as is the outer rail.
  • the contact rail of the type mentioned has the characteristics 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.
  • the rail can have an electrical conductor applied to an insulating material body, but it can also consist as a whole of a material which has the desired properties, for example of an electrically conductive material such as sintered metal or carbon.
  • An electrical conductor applied to an insulating body can be a special form applied to the insulating body.
  • act band-shaped material which is applied, for example, as a helix, but there can also be another configuration such as a meandering shape, or the electrical conductor can be applied in the form of a coating to an insulating material body, for example it can be vapor-deposited or applied galvanically or plated, etc.
  • the inner rail of the contact rail which in the known thread monitors is held in a U-shaped outer rail in cross section and which itself has a rectangular cross section, so that expediently on a cross section cuboid isol i ermateri al body. an electrical conductor is applied.
  • this consists of a metal coil, which is wound tightly but without touching the turns on the insulating material body.
  • FIG. 1 shows a contact rail with a guard plate arranged thereon in a diagrammatic representation
  • FIG. 2 shows a cross section through a contact rail according to FIG. 1 on a larger scale
  • FIG. 3 detail in side view of a contact rail with metal pus on the inner rail;
  • FIG. 4 shows a cross section through the contact rail according to FIG. 3;
  • 5 shows the inner rail on a larger scale, with a coating as an electrical conductor;
  • 6 shows the inner rail as an electrically conductive solid body;
  • Figure 7 shows the inner rail with two strei fen-shaped electrical conductors.
  • 8 shows the inner rail with a grid-shaped braid as an electrical conductor;
  • Fig. 16 is a side view of a contact rail with guard slats and the schematic representation of the principle for finding a fallen guard 1 amel 1 e. 1 shows a contact rail 1 which is also used in known thread monitors and 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 if the thread breaks, the guard plate 3 falls down onto the contact rail 1.
  • the contact rail 1 consists of an outer rail 6 with a groove 7 at the upper edge, in which the inner rail 9 is held separately by an insulating material 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 connected in a current-conducting manner by a falling guard lamella 3, so that a machine stop is triggered if the thread breaks.
  • the operating principle of the contact rail according to FIGS. 1 and 2 applies to all the embodiments according to the invention according to FIGS. 3-16. 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.
  • an insulating material is body 10, which has a cuboid cross-section, a metal 1 egg helix 11 wound such that the turns do not touch while maintaining a very small distance.
  • the metal 1 egg terwendel 11 is formed by winding a strip material, which is preferably made of chromium-nickel steel and has a constant cross-section 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 body 10.
  • An inner rail designed in this way now has a much higher electrical resistance, for example between 20 and 100 Ohm, as a solid rail of the same length, in which the electrical resistance is approximately zero.
  • the distance between the windings of the metal conductor coil 11 is smaller than the material strength 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 coil 11 and the outer rail 13.
  • the inner rail 12 having the metal conductor coil 11 and the outer rail 13 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 isolate material body 16 and an electrical one applied to this body conductive coating 17, 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 applied galvanically.
  • a coating can also be rolled on or plated on. It does not have to cover the entire surface.
  • a VolT rod 18 made of a conductive material as the inner rail, this material being made of sintered metal or based on carbon.
  • a conductive plastic can also be used.
  • the inner slide made of such a material only has to have a significantly higher electrical resistance than a rod made of metal.
  • An inner rail 19 shown in Fig. 7 consists of an Isol i ermateri al body 20, on the oblique surfaces 21 extending on the upper longitudinal edge 21 narrow electrical conductors 22 are applied, which extend over the entire length of the rail and come into contact with a fallen guard plate 3 .
  • An inner rail 23 shown in FIG. 8 consists of an insulating body 24 and a mesh-like braid 25 applied to this body and formed from electrical conductors.
  • an inner rail 26 consists of a flat insulating body 27, which on one of its two longitudinal sides, which does not come into contact with a fallen guard slat 3, has a length over the rail extending thin conductor track 28 which is located at a location protected against mechanical stress and which has the electrical resistance suitable for the measurement method and can be tapped at any point along the rail as a measurable value.
  • This electrical conductor track 28 is on the upper longitudinal edge of the Isol i ermateri al body 27 in a tight row one behind the other but with a small distance from each other contact bodies 29 each connected via an electrical conductor 30, these having a larger material strength and the upper edge of the Isol ermateri al body enclosing contact body 29 withstand the mechanical stress that occurs, so that the conductor track 28 used for the measurement method can be made very thin.
  • the contact body 2.? are limited by inclined surfaces similar to the screw-shaped 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.
  • FIGS. 12-15 A further embodiment of an inner rail 33 shown in FIGS. 12-15 consists of an insulating material body 34 on which an electrical conductor track 35 with a constant cross-section with a longitudinal direction " and a transverse direction continuous " and transverse direction 1 linear course is applied
  • Such a course of the conductor track is also present in the embodiment of the rail 33 according to FIGS. 12-15 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 body 34 with the exception of the lower side surface, as can also be seen from the side view according to FIG. 13. A development of the rail surface with the conductor track is shown in FIG.
  • FIG. 16 schematically shows the principle of the method which can be carried out using a contact rail according to the invention for the localization of a watchdog 1 e falling on the contact rail when the thread breaks.
  • the contact rail 1 has one of the embodiments shown in FIGS. 3-15.
  • a number of guard slats 3 are also shown, which are in reality very close together 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 plate 3, on each of which a Wacher1 amel 1 e hangs.
  • a guard slat shown in the middle in FIG. 16 has fallen onto the contact rail 1 as a result of thread breakage. This fallen guard 1 amel 1 e is to be located on a contact rail several meters long with a very large number of guard slats.
  • the inner rail of the contact rail has 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 over and over can be measured according to the principle of the electrical measuring bridge Entire rail length extending electrical conductor of the inner rail and the resistance of the partial length of this electrical conductor of one
  • the overall length 1 has a resistance R, and the partial length 1, a resistance R,.
  • the principle of the electrical measuring bridge used for determining the resistance ratio is known.
  • 16 is a bridge Power supply 40 is electrically connected to the inner rail of the contact rail 1.
  • 4! is a "sample and hold" amplifier
  • 43 is an amplifier
  • 44 is an A / D converter
  • 45 is the display. 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 weaving machine.
  • the A / D converter 44 existing for display already • digitized data can be passed via a serial interface # 48 continue to a data processing system.
  • a data processing system 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 working 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.
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 true EP0276206A1 (fr) 1988-08-03
EP0276206B1 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715011A1 (fr) 1994-11-30 1996-06-05 ACTEX S.p.A. Rail pour casse-chaîne de métiers à tisser avec indication automatique de la zone de rupture de fil

Families Citing this family (4)

* 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
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8800626A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715011A1 (fr) 1994-11-30 1996-06-05 ACTEX S.p.A. Rail pour casse-chaîne de métiers à tisser avec indication automatique de la zone de rupture de fil

Also Published As

Publication number Publication date
EP0276206B1 (fr) 1989-12-27
JPH01500446A (ja) 1989-02-16
WO1988000626A1 (fr) 1988-01-28
DE3667803D1 (de) 1990-02-01
SU1650015A3 (ru) 1991-05-15
US4838320A (en) 1989-06-13

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