EP1377513B1 - Detecteur de fil - Google Patents

Detecteur de fil Download PDF

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Publication number
EP1377513B1
EP1377513B1 EP02732552A EP02732552A EP1377513B1 EP 1377513 B1 EP1377513 B1 EP 1377513B1 EP 02732552 A EP02732552 A EP 02732552A EP 02732552 A EP02732552 A EP 02732552A EP 1377513 B1 EP1377513 B1 EP 1377513B1
Authority
EP
European Patent Office
Prior art keywords
thread
deflector
detector
deflectors
path
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
EP02732552A
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German (de)
English (en)
Other versions
EP1377513A1 (fr
Inventor
Birger Johansson
Pär JOSEFSSON
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.)
Iropa AG
Original Assignee
Iropa 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 Iropa AG filed Critical Iropa AG
Publication of EP1377513A1 publication Critical patent/EP1377513A1/fr
Application granted granted Critical
Publication of EP1377513B1 publication Critical patent/EP1377513B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/40—Applications of tension indicators
    • 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 invention relates to a thread detector according to the preamble of patent claim 1.
  • An example of a place of use of such a thread detector is the thread path between a weft thread delivery device and the shed of a weaving machine.
  • For Control operations of all kinds become information about the current Thread tension of the resting or running thread and additional weft monitor information needed over thread running / stopping conditions.
  • DE-A-100 00 232 relates to a measuring device for thread tension measurement by a thread.
  • the invention has for its object a thread detector of the aforementioned Way of creating the information required in other ways and determined better adapted to the respective conditions, with less mechanical Derives load for the thread, inexpensive and reliable to manufacture and a very wide range of applications (for different types of thread processing Systems or weaving machines and delivery devices and all used in practice Thread qualities) is able to cover.
  • each deflector feels the thread with regard to a special requirement and for the task assigned to him (thread tension measurement and / or running / stopping conditions) optimally. For this reason alone, every deflector can with a relatively simple converter device tailored to the respective function cooperate. If one function fails, the other function remains unaffected receive. Since the two deflectors divide the thread deflection among themselves and like a single positive thread guide, a kind of two-dimensional thread guide, act, the mechanical load on the thread is moderate and sufficient an overall deflection that is significantly less than the sum of the deflections in two completely separate devices for one function each.
  • each deflector takes just as much of that Thread loading as appropriate for the function assigned to it.
  • the two deflectors are expedient in the thread path directly and without contact adjacent, so that generated on at least one deflection surface from the load Force as effective as possible directly on the deflecting surface of the other deflector becomes.
  • the mutual proximity of the deflectors has the advantage that they act together as a single two-dimensional thread guide and the current one Stabilize the thread effectively, which is favorable for the scanning accuracy.
  • the angle between the deflection surfaces should be at least essentially 90 °. This ensures clean guidance of the running thread.
  • the degree of displacement determines the deflection of the thread in the thread detector.
  • the deflecting surfaces are preferably both Deflectors offset from the straight thread path, so that the thread each exerts the necessary loads on both deflection surfaces for scanning.
  • An inclined angle at least of the deflection surface of a deflector is particularly important in relation to a plane that is defined by the fictitious straight thread path and the actual thread path is defined.
  • This inclination is set so that from the Thread loading on the inclined deflection surface is a sliding force component to the deflecting surface of the other deflector is generated. This will make the deflection surface of the other deflector not only with the reaction force from the deflection of the Thread, which can be low there, but also due to the sliding force component applied.
  • This arrangement allows a relatively small overall Set the total deflection angle for the thread, which is gentle on the thread.
  • An inclination angle of about 70 ° with respect to the plane mentioned is for one Deflection surface cheap. With a 90 ° crossing of both deflectors, this is then Oblique angle with respect to the same plane of the other deflector is approximately 20 °. This Angles can be varied.
  • the deflector, its deflecting surface, is expedient forms the inclined angle of approximately 70 ° with the plane for thread tension measurement responsible. Because the thread tension can be more sensitive determine if the thread is a significant part of the resulting from the thread tension Exerts a load on this deflector.
  • the deflectors which operate separately, are each arranged on a transducer element, that is stationary supported. It is useful to use the deflectors with their To attach the foot area to the transducer element, so that the loads on the thread be transmitted with a priced lever arm and unadulterated. Especially Piezoelectric or photo-elastic transducer elements are expedient because these Deliver meaningful useful signals with moderate control effort. alternative could also use inductive, triboelectric or other transducer elements or strain gauges directly on the deflectors.
  • the construction effort remains low if every piezoelectric transducer element in a film chip is integrated, which is also at least part of the evaluation circuit contains.
  • a fluoroscopic photo-elastic transducer element changes its optical properties depending on its deformation or its internal state of tension.
  • the intensity of the emerging light varies within a wide range and delivers meaningful signals that are easy to pick up and optoelectronic are evaluable.
  • the photoelastic transducer element is expediently a plate made of a transparent one Plastic such as polycarbonate (or an optical glass) that is at least one-sided, preferably both ends, clamped and almost exclusively from the deflector Torsion is applied.
  • This material is largely in a stress-free state isotropic and becomes with increasing internal tension, e.g. a torsional stress, anisotropic. This change is due to the optoelectronic scanning device followed and as an output signal, for example, representative of the thread tension delivered, and without any significant reinforcement or conditioning effort.
  • the optical axis of the scanner should be the plate penetrate perpendicular to their surfaces.
  • isochromatic light e.g. Red light from an LED
  • isochromatic light becomes the photo-elastic element X-rayed
  • polarizing elements on the input and output sides with one another crossing polarization axes are used to set a position in which almost no light is emitted when the element is not under load and with increasing internal tension the intensity of the emerging light after a Function increases, which even linearizes with simple control technology can be.
  • the variation in the intensity of the emerging light can e.g. with a Photo transistor can be tapped.
  • An embodiment of the thread detector with a base body is structurally simple, a storage for the converter devices and the deflectors as well as the thread guides contains.
  • the deflectors should cross each other without contact.
  • the Storage advantageously has an inclined position about the thread axis, so that the load on the thread on the at least one deflector increased contact pressure against the deflection surface of the other deflector and the response behavior of the thread detector increases, so that overall a small deflection angle in Thread detector can be selected.
  • the storage is even expediently adjustable in order to adapt to the respective To be able to carry out working conditions or thread qualities.
  • a thread detector F in FIG. 1 is intended for use in thread processing systems, for example for use in the thread path between a weft thread delivery device and a weaving machine. With the thread detector F you can choose here the thread tension measured and / or the thread running / stopping condition of the Weft thread to be monitored. Each function is carried out independently. If necessary, one of the two functions can remain unused without the other Impair function. Of course, both functions can be permanent be carried out side by side.
  • the thread detector F in FIG. 1 has a base body 1, in which in FIG molded receptacles 3 a storage 2 for two transducer assemblies W mounted is.
  • a bridge-like holder 7 supports two thread guides 8 which pass through the thread path define the thread detector F. 4 with a surface of the holder 7 is designated, which are assumed to be a horizontal reference plane for easier explanation can.
  • a transducer element 20 is stationary, e.g. on piezoelectric transducer element or a photoelastic transducer element.
  • a first deflector D1 and a second deflector D2 respectively cantilevered on one side, e.g. in the form of a round bar or tube 5, for example made of ceramic material.
  • the transducer elements 20 are connected to one electronic evaluation circuit 6 connected, from the output signals i1, i2 to be delivered.
  • the evaluation circuit 6 can be accommodated in the base body 1.
  • the transducer elements 20 are integrated in film chips, which at least already contain part of the evaluation circuit.
  • the two deflectors D1, D2 are arranged one behind the other in the thread path, without each other to touch.
  • Each deflector D1, D2 forms a deflecting surface 9, 10 for the supported by the thread guide 8 thread Y.
  • the deflecting surfaces 9, 10 close with each other an angle ⁇ , which is illustrated by the bearing 2, e.g. one Angle of about 90 °.
  • the thread Y is between the thread guides 8 on both deflection surfaces 9, 10 deflected.
  • the second Deflector D2 can be oriented vertically to surface 4 or, as shown, with a Crossing angle ⁇ of approximately 90 ° to the first deflector D1 also with the bearing 2 in Fig. 1 to the top right.
  • the bank angle ⁇ can for example by an adjusting device 22 in the base body 1 on the bearing 2 be changed as needed.
  • the deflector D1 with its transducer element W is useful for measuring the Thread tension.
  • Deflector D2 on the other hand, is used to monitor the faderil / stop conditions.
  • the first and second deflection surfaces 9, 10 share the overall deflection of thread.
  • the deflection surface 9 are more strongly impacted by the thread Y than the deflecting surface 10.
  • the first and second deflecting surfaces 9, 10 on both deflectors D1, D2 compared to the fictitious stretched thread path defined by the thread guide 8 offset, so that in the angular bend between the two deflection surfaces 9, 10 guided and deflected at both deflecting surfaces 9, 10 from its Load on the deflectors D1, D2 at least in the direction of orientation first deflection surface 9 directed sliding force component K to the other deflection surface 10 developed that increases the contact pressure on the other deflecting surface 10.
  • On thread section 11 of the thread Y extending to the first deflection surface 9 2 upwards and slightly to the left, is deflected at the first deflection surface 9, then changes over to the second deflection surface 10.
  • the thread Y is on the deflected the second deflecting surface 10 and against it also with the component K pressed, and runs with a running section 12 to the other thread guide 8th.
  • the second deflection surface 10 is vertically aligned with that through the thread guide 8 defined stretched thread path arranged.
  • the first deflection surface 9 is below the tilt angle ⁇ tilted to the right relative to the plane E, so that the deflected tapering thread section 11 from the load on the first deflection surface 9 developed a rightward sliding force component K, which additionally presses against the second deflection surface 10.
  • the two deflectors D1, D2 are at an intersection angle with one another of about 90 °.
  • the first deflector D1 is with the bank angle ⁇ (for example 70 °) slanted to the right relative to plane E, so that the tapering thread section 11 on the first deflecting surface 9 the sliding force component K developed to the right to the second deflection surface 10 and the expiring Thread section 12 presses against the second deflection surface 10.
  • the running thread section 12 is also due to the oblique position of the second deflector D2 redirected this.
  • the deflector D1 is a photo-elastic one Transducer element 20 indicated.
  • This has the shape of a thin, elongated one Plate 13 and consists of photo-elastic material, such as plastic or optical glass, which, for example, largely in a voltage-free state is isotropic. With increasing internal tension, this material changes its optical Properties e.g. towards anisotropic, what about using fluoroscopy, for example isochromatic light can be converted into a clear output signal.
  • the intensity of the emerging light changes and can be scanned to initially towards the tension condition and thus indirectly towards the thread tension conclude.
  • the plate 13 is clamped stationary at 14 at both ends, for example.
  • the Deflector D1 is attached to the plate 13 and cantilevered freely on one side, so that the Thread Y applied to him in the plate 13 produces pure torsion, i.e. inner Torsional stresses.
  • an optoelectronic scanning device T is provided with which the Change in the optical properties of the plate 13 with fluoroscopy (or reflection) is tapped.
  • the optoelectronic scanning device T has an optical one Axis 21 which penetrates the plate 13 approximately perpendicular to its surfaces 17.
  • a light source 15 in the optical axis 21 e.g. placed a red light LED which e.g. emits at least quasi-isochromatic light
  • a first polarizing element 16 In front of the surface 17 of the plate 13 is a first polarizing element 16 with one in the Placed direction set linear polarization axis.
  • a second polarizing element 18 placed so that its linear polarization axis is the polarization axis of the first polarizing element 16 crosses.
  • a Receiver 19 placed, for example a photo transistor.
  • the intensity of the emerging light grows according to a mathematical Function, e.g. with the square of the torque applied by deflector D1, what the receiver 19 registers.
  • an output signal e.g. i1, representative of the current thread tension supplied.
  • the two deflectors D1, D2 are included straight deflection surfaces formed transversely to the thread axis.
  • the deflection surfaces could also be concave or convex curved.
  • the two deflectors must also be used D1, D2 should not be immediately adjacent. There could be a small gap be set, or vice versa even a spatial overlap between the two Deflectors, e.g. through corresponding cutouts in the deflectors so that the whose two deflection surfaces 9, 10 are moved closer together than shown.
  • the angle included between the two deflecting surfaces 9, 10 could also be used also be significantly smaller than 90 ° or larger than 90 °, but not larger than 180 °.
  • a total deflection angle of ⁇ 15 ° for the thread is sufficient for most thread qualities to precisely measure the thread tension and the thread running / stopping conditions to be able to monitor.
  • Each function can be switched on or off individually become. The failure of one function affects the other function Not.

Landscapes

  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Glass Compositions (AREA)
  • Coating With Molten Metal (AREA)
  • Looms (AREA)

Claims (14)

  1. Détecteur de fil pour des conditions de déplacement ou d'arrêt du fil et/ou la tension du fil, comprenant un agencement de déflecteur pour la déviation du fil, au moins un dispositif de conversion (W) engendrant un signal, pouvant être sollicité mécaniquement par l'agencement de déflecteur et réagissant à des sollicitations ou charges exercées par le fil, et au moins un circuit de traitement électronique (6) pour la déduction de signaux de sortie (il, i2), des guides-fil (8) stationnaires, qui définissent le parcours de fil, étant prévus en amont et en aval de l'agencement de déflecteur, caractérisé en ce que l'agencement de déflecteur comprend, successivement dans le parcours de fil, un premier déflecteur (D1) et un second déflecteur (D2) à chacun desquels est associé un dispositif de conversion (W), et en ce que les premier et second déflecteurs (D1, D2) présentent des première et seconde surfaces de déviation (9, 10), qui sont orientées chacune transversalement à l'axe du fil, et qui forment ensemble, vu dans la direction de l'axe du fil, un angle (β) < 180°, et se répartissent mutuellement la déviation du fil.
  2. Détecteur de fil selon la revendication 1, caractérisé en ce que dans le parcours de fil, les premier et second détecteurs (D1, D2) sont directement voisins et sans contact réciproque.
  3. Détecteur de fil selon la revendication 1, caractérisé en ce que l'angle (β) vaut au moins sensiblement 90°.
  4. Détecteur de fil selon la revendication 1, caractérisé en ce que les surfaces de déviation(9, 10), chacune dans la direction de l'orientation de l'autre surface de déviation, sont décalées transversalement à l'axe du fil, par rapport à un parcours de fil fictif, tendu entre les guides-fil (8).
  5. Détecteur de fil selon la revendication 1, caractérisé en ce que le parcours de fil fictif, tendu entre les guides-fil (8), et le parcours de fil effectif dévié par les déflecteurs (D1, D2), définissent sensiblement ensemble un plan (E), et en ce qu'au moins la surface de déviation (9) d'un déflecteur (D1), quant à son orientation transversalement à l'axe du fil, est agencée de manière inclinée par rapport audit plan (E) avec un angle de position d'inclinaison (χ), de façon telle que la sollicitation du fil au niveau de cette surface de déviation (9) génère une composante de force de glissement (K) en direction de la surface de déviation (10) de l'autre déflecteur (D2).
  6. Détecteur de fil selon la revendication 5, caractérisé en ce que l'angle de position d'inclinaison (χ) dudit un déflecteur (D1) se situe à environ à une valeur de 70°, et l'autre déflecteur (D2) forme de préférence avec sa surface de déviation (10), un angle de position d'inclinaison d'environ 20° avec le plan (E).
  7. Détecteur de fil selon la revendication 1, caractérisé en ce que les deux déflecteurs (D1, D2) sont des tiges ou tubes (5) ronds, montés à une extrémité et présentant des diamètres extérieurs sensiblement identiques, de préférence en un matériau céramique.
  8. Détecteur de fil selon la revendication 1, caractérisé en ce que chaque détecteur (D1, D2) est placé sur un élément de conversion (20) disposé de manière stationnaire, de son dispositif de conversion (W).
  9. Détecteur de fil selon la revendication 8, caractérisé par un élément de conversion (20) piézoélectrique ou photo-élastique.
  10. Détecteur de fil selon la revendication 9, caractérisé en ce que l'élément de conversion piézoélectrique (20) est intégré dans une puce sur film.
  11. Détecteur de fil selon la revendication 9, caractérisé en ce que l'élément de conversion photo-élastique (20) est réalisé sous forme de plaque en une matière plastique transparente telle que du polycarbonate, et est enserré au moins sur un côté (14) et sollicité en torsion par le déflecteur (D1), et en ce qu'il est prévu pour l'état de contrainte interne de l'élément de conversion, un dispositif d'exploration optoélectronique (T) dont l'axe optique (21) transperce l'élément de conversion (20) environ perpendiculairement à la surface de plaque (17).
  12. Détecteur de fil selon la revendication 11, caractérisé en ce que le dispositif d'exploration optoélectronique (T) comprend une source de lumière (15), de préférence pour de la lumière isochromatique ou de la lumière rouge, des éléments de polarisation (16, 18) avec des axes de polarisation croisés de part et d'autre de l'élément de conversion (20), et un photoélément en guise de récepteur (19).
  13. Détecteur de fil selon l'une au moins des revendications précédentes, caractérisé en ce que dans un corps de base (1) est prévu un palier de montage (2) comprenant des logements (3) inclinés l'un par rapport à l'autre d'environ 90° et destinés aux deux dispositifs de conversion (W), en ce que deux guides-fil (8) définissant le parcours de fil sont placés sur le corps de base (1), en ce que les deux déflecteurs (D1, D2) s'étendent, en étant issus du palier de montage (2), transversalement à travers le parcours de fil, et se croisent mutuellement sous un angle < 180°, de préférence d'environ 90°, et en ce que le palier de montage (2) prend, autour de l'axe du fil, une position d'inclinaison par rapport à un plan (E) qui est défini par le parcours de fil fictif, tendu entre les deux guides-fil, et le parcours de fil effectif déviés par les deux déflecteurs (D1, D2).
  14. Détecteur de fil selon la revendication 13, caractérisé en ce qu'il est prévu un dispositif de réglage (22) pour la position d'inclinaison du détecteur de fil (F), de préférence pour le palier de montage (2) dans le corps de base (1).
EP02732552A 2001-04-10 2002-04-03 Detecteur de fil Expired - Lifetime EP1377513B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10117879A DE10117879A1 (de) 2001-04-10 2001-04-10 Fadendetektor
DE10117879 2001-04-10
PCT/EP2002/003692 WO2002083539A1 (fr) 2001-04-10 2002-04-03 Detecteur de fil

Publications (2)

Publication Number Publication Date
EP1377513A1 EP1377513A1 (fr) 2004-01-07
EP1377513B1 true EP1377513B1 (fr) 2004-09-22

Family

ID=7681088

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02732552A Expired - Lifetime EP1377513B1 (fr) 2001-04-10 2002-04-03 Detecteur de fil

Country Status (6)

Country Link
US (1) US20040188232A1 (fr)
EP (1) EP1377513B1 (fr)
CN (1) CN1274573C (fr)
AT (1) ATE276960T1 (fr)
DE (2) DE10117879A1 (fr)
WO (1) WO2002083539A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10333202A1 (de) * 2003-07-22 2005-03-03 Hottinger Baldwin Messtechnik Gmbh Gehäuse für einen Fadenspannungsaufnehmer
DE102005059028A1 (de) * 2005-12-10 2007-06-14 Saurer Gmbh & Co. Kg Fadenführer
DE102011112012A1 (de) * 2011-08-30 2013-02-28 Oerlikon Textile Gmbh & Co. Kg Fadenzugkraftsensor
JP2013049932A (ja) * 2011-08-31 2013-03-14 Murata Mach Ltd 紡績機
EP3165490A1 (fr) * 2015-11-09 2017-05-10 Eltex of Sweden AB Dispositif pour le transfert d'une force mécanique en un signal électrique
CN210973376U (zh) * 2019-08-29 2020-07-10 中山市普洛斯智能设备科技有限公司 张力检测装置

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US2109605A (en) * 1937-05-19 1938-03-01 Wachsman Michael Stop mechanism for knitting machines
US2744174A (en) * 1953-02-17 1956-05-01 Triplite Ltd Yarn detecting mechanism for textile machine stop motions
US3300161A (en) * 1963-09-21 1967-01-24 Frau Sigrid Heim Control device
US3613065A (en) * 1970-03-03 1971-10-12 Lindly & Co Inc Apparatus utilizing a vibratable member for detecting sustained tension in a running length or strand
US3789631A (en) * 1972-02-08 1974-02-05 Stop Motion Devices Corp Yarn tension control device
US3772487A (en) * 1972-08-04 1973-11-13 N Levin Stop motion apparatus for knitting machines
US3888095A (en) * 1973-03-16 1975-06-10 Morris Philip Stop motion assembly and method
CH622561A5 (fr) * 1977-11-01 1981-04-15 Loepfe Ag Geb
JPS6023065B2 (ja) * 1978-02-16 1985-06-05 東レ株式会社 糸条巻取装置
CH643614A5 (de) * 1980-04-01 1984-06-15 Loepfe Ag Geb Elektronischer schussfadenwaechter.
US4551591A (en) * 1984-06-18 1985-11-05 Jones Robert E Stop motion switch
IT1227077B (it) * 1988-09-08 1991-03-14 Vamatex Spa Sistema per controllare la tensione della trama alimentata ad un telaio tessile senza navette.
DE4131656A1 (de) * 1991-09-23 1993-03-25 Iro Ab Verfahren und webmaschine
DE4306911C1 (de) * 1993-03-05 1993-12-23 Dornier Gmbh Lindauer Schußfadenbremse mit steuerbarer Bremswirkung
US5476122A (en) * 1993-03-05 1995-12-19 Lindauer Dornier Gesellschaft Mbh Weft thread brake responsive to yarn characteristics in a loom
DE19537215C2 (de) * 1995-10-06 1999-09-02 Memminger Iro Gmbh Fadenliefergerät für elastische Garne
DE10000232A1 (de) * 1999-01-19 2000-07-20 Barmag Barmer Maschf Meßeinrichtung zur Fadenspannungsmessung

Also Published As

Publication number Publication date
DE10117879A1 (de) 2002-10-17
EP1377513A1 (fr) 2004-01-07
ATE276960T1 (de) 2004-10-15
DE50201115D1 (de) 2004-10-28
CN1274573C (zh) 2006-09-13
CN1511108A (zh) 2004-07-07
US20040188232A1 (en) 2004-09-30
WO2002083539A1 (fr) 2002-10-24

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