EP2530191B1 - System zum Erkennen von Rovingbrüchen in einem Rovingrahmen - Google Patents

System zum Erkennen von Rovingbrüchen in einem Rovingrahmen Download PDF

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Publication number
EP2530191B1
EP2530191B1 EP12162700.4A EP12162700A EP2530191B1 EP 2530191 B1 EP2530191 B1 EP 2530191B1 EP 12162700 A EP12162700 A EP 12162700A EP 2530191 B1 EP2530191 B1 EP 2530191B1
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EP
European Patent Office
Prior art keywords
roving
sensor
sensors
frame according
roving frame
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Application number
EP12162700.4A
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English (en)
French (fr)
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EP2530191A1 (de
Inventor
Flavio Morandi
Andrea Cattaneo
Rosario Assenza
Pietro Sangaletti
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Marzoli Machines Textile SRL
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Marzoli Machines Textile SRL
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Publication date
Priority claimed from IT000081A external-priority patent/ITBS20110081A1/it
Priority claimed from IT000112A external-priority patent/ITBS20110112A1/it
Application filed by Marzoli Machines Textile SRL filed Critical Marzoli Machines Textile SRL
Publication of EP2530191A1 publication Critical patent/EP2530191A1/de
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Publication of EP2530191B1 publication Critical patent/EP2530191B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D01H13/1616—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material characterised by the detector
    • D01H13/1633—Electronic actuators
    • D01H13/165—Photo-electric sensing means

Definitions

  • the present invention relates to a roving frame on a spinning line and, in particular, an electronic device of the roving frame to detect breakage of the roving.
  • a roving frame the fibre web obtained by carding or combing, deposited in cans, is drawn in a drawing device, to obtain a roving.
  • a drawing device downstream of the drawing device, the roving is wound around tubes, to obtain the spools to be sent to the spinning unit.
  • the roving frame works contemporarily on a large number of machining points.
  • the roving frame FTSN by Marzoli S.p.a. envisages 192 spools and extends for a length of about 25 metres.
  • the drawing which occurs on the roving frame is strongly driven, so that the speed of the roving downstream of the drawing device is very high, generally around 25 m/min. Moreover, the roving is subject to strong oscillations between the drawing device and the spool forming device, and therefore subject to breakage.
  • the purpose of the present invention is to make a roving frame provided with a particularly economical system for detecting breakage of the roving.
  • FIG. 1 shows a diagram of a roving frame according to the present invention
  • FIG. 2 shows a detail of an intermediate region of the roving frame
  • FIG. 3 shows a detection device of the roving frame according to the present invention
  • figure 4 shows a shell of the device in figure 3 ;
  • figure 5 show a front view of the shell in figure 4 ;
  • figure 6 shows a cover of the device in figure 3 ;
  • figure 7 show a front view of the cover in figure 6 ;
  • FIG. 8 shows a diagram of a roving frame system for detecting breakage of a roving, comprising the device in figure 3 ;
  • FIG. 9 shows a detail of an intermediate region of the roving frame, according to a further embodiment of the present invention.
  • FIG. 10 shows a detail of an intermediate region of the roving frame, according to yet a further embodiment of the present invention.
  • reference numeral 1 globally denotes a roving frame according to the present invention.
  • the roving frame 1 comprises a plurality of work stations, one alongside the other longitudinally, each able to make a roving.
  • the roving frame 1 comprises a feed device 2 of the web W, contained in cans 4.
  • the feed device 2 comprises a support frame 6 and deviation bars 8, preferably swivelling, for the deviation of the web coming out of the cans.
  • the roving frame 1 comprises a plurality of web breakage sensors, suitable for detecting the breakage of the web W coming out of the cans.
  • the roving frame 1 further comprises a frame 10 which, at the top, supports a drawing device 12 suitable for drawing the web W to obtain a roving R.
  • the drawing device 12 comprises at least two pairs of pressure coupled rollers, typically motorised lower rollers and non-motorised upper pressure rollers, each coupled to the respective lower roller.
  • three pairs of rollers are envisaged, one downstream of the other.
  • the difference in peripheral speed between the pairs of rollers in sequence determines the drawing of the web.
  • the roving frame 1 further comprises first means of moving to move the rollers of the drawing device 12.
  • the frame 10 comprises a perforated table 11, through which the rovings pass from the upper region to the lower region.
  • the roving frame 1 comprises a winding device 14, under the table 11, suitable for winding the roving R coming out of the drawing device 12 in spools S.
  • the roving frame 1 further comprises second means of moving for the winding device 14.
  • an intermediate region 19 is defined at the upper part of the table 11, traversed by the rovings during normal operation of the roving frame.
  • the roving frame 1 comprises a substitution device 16 suitable for picking up the spools S upon completion of formation and inserting empty tubes in the spool forming device 14, for the formation of further spools, and transporting the spools S for subsequent processing, in particular to a ring spinning frame.
  • the roving frame 1 comprises a roving breakage detection system 20, suitable for detecting the breakage of a roving R coming out of the drawing device 12.
  • the roving breakage detection system 20 comprises a plurality of sensors suitable for detecting the presence of the roving in a detection zone of the intermediate region 19.
  • said sensors are suitable for generating a primitive detection signal Sp depending on the presence or absence of the roving in the detection zone.
  • the sensors are digital, that is to say suitable for generating a primitive signal Sp having two logical states depending on the presence or absence of the roving in the detection zone.
  • the sensors consist of photocells.
  • the sensors consist of contact sensor photocells, that is to say based on the reflection of light by the roving which intercepts the luminous beam emitted.
  • the photocells are contact sensors with background suppression, suitable for discriminating objects of small sizes regardless of the adjacent background.
  • a detection device 30 comprises a casing 32 provided with longitudinally opposite apertures 34, and said sensors, two per device, are housed in said casing and look out from the respective apertures 34.
  • connection means 38 integrated in the casing 32, for the releasable connection of the casing and the frame 10 of the roving frame 1.
  • the roving frame 1 comprises a sensor bar 35, made in several pieces, having a longitudinal extension all along the length of the frame 10 and positioned above the table 11 of the same.
  • the detection devices 30 are connected to the sensor bar 35, regularly distanced longitudinally, between one work station and another, so that each is situated between two rovings R.
  • the device comprises luminous signalling means, on the casing, operatively connected to the sensors, suitable to signal the presence and/or absence of the roving.
  • the system comprises luminous signalling means operatively connected to the sensors, suitable for signalling the presence and/or absence of the roving.
  • the signalling means comprise a presence LED 42, preferably positioned in the intermediate region 19 preferably above the table 11 of the frame 10.
  • the presence LED 42 is positioned between two devices 30 alongside each other.
  • individual signalling means are operatively connected to a plurality of sensors, that is to a plurality of photocells, so that the signalling of breakage of the roving is performed upon breakage of at least one roving of the plurality of rovings associated with the plurality of sensors connected to said signalling means.
  • a single signalling LED 42 is associated with the state of a group of rovings.
  • the system 20 further comprises a digital processing device 50 for each sensor of the detection device 30, operatively connected to the respective sensor to pick up the primitive signal Sp, process it and emit a respective processed signal.
  • said processing device 50 comprises a digital low-pass filter suitable for cutting out the high frequencies of the primitive signal Sp, to cancel out the influence of the oscillation of the roving, such as to bring it outside the detection zone.
  • said processing device 50 comprises a digital timer suitable for increasing the sampling range of the primitive signal Sp, again so as to cancel out the influence of the oscillation of the roving.
  • a filter 60 comprises a plurality of processing devices 50, for example grouped into 8 detection devices 30 at time, corresponding to detection on 16 rovings (therefore grouped for 16 photocells at a time).
  • the roving frame 1 comprises an electronic control device 70 connected to the processing devices 50 or to the respective filters 60 and to the first and second movement means.
  • the control device 70 is suitable for picking up, among other things, the processed signals and for sending a command signal to the first and second moving means, to stop the drawing device and the winding device if at least one of the signals processed is indicative of the presence of a breakage of the roving.
  • the system 20 comprises a comparison device 55 connected to the processing devices 50, suitable for picking up the processed signals from the processing devices and for generating a comparative signal Sc which indicates the presence of a breakage if at least one of the signals processed indicates the presence of a breakage.
  • control device 70 is operatively connected to the comparison device to pick up the comparative signal Sc, and to the first and second moving means to send command signals to these and stop the drawing device 12 and the winding device 14 in the presence of at least one comparative signal indicating the presence of a breakage of the roving.
  • said comparison device 55 comprises a plurality of relays.
  • the system 20 provides for a plurality of comparison devices 55, each comparison device being associated with only a predefined number of processing devices 50.
  • the comparison device 55 is associated with a group 8 of processing devices 50.
  • control device 70 comprises a PLC.
  • the sensors When the rovings R coming out of the drawing device 12 advance regularly across the intermediate region 19, the sensors, focused on the detection zone, emit a highly oscillating primitive signal Sp on account of the oscillations of the roving, which even take it outside the detection zone.
  • the primitive signals Sp are picked up by the processing devices 50, which act as low-pass filters or timers, such as to emit regular processed signals, which identify the presence of the roving without breakage in the detection zone.
  • the processing device 50 affected by the breakage emits a regular processed signal which identifies the permanent absence of the roving in the detection zone (that is, the breakage of the roving).
  • control device 70 stops the drawing device 12 and the winding device 14, picking up the signals processed by the processing devices directly or picking up the comparative signal Sc emitted by the comparison devices.
  • the detection system provides for a plurality of comparison devices in cascade, so as to progressively limit the number of signals to be transmitted to the processing device.
  • the permanent absence of the roving in the detection zone, identified as breakage of the roving corresponds to an electric signal, in other words the signal processed is non- null; while the permanent presence of the roving in the detection zone, identified as non-breakage of the roving, does not correspond to an electric signal, in other words the signal processed is null.
  • such characteristic makes it possible to limit the power supply voltage of the detection system, and in particular of the relay comparison devices.
  • the casing 32 comprises a shell 32a and a cover 32b, coupling to each other to form the inner housing which the sensors are positioned in.
  • the shell 32a and the cover 32b are made from plastic material, for example from antistatic polycarbonate, preferably transparent, for example frosted.
  • the sensors are positioned in the casing, or said casings are fitted to the sensor bar 35, so that the direction of emission E of the ray is inclined, for example downwards, in relation to a horizontal direction, preventing reciprocal interference.
  • said direction of emission is inclined by an angle of 1° to 4°, preferably 1° to 3°, preferably equal to 2°.
  • the sensors are positioned in the casing, or said casings are fitted to the sensor bar 35, so that the direction of emission E of the rays emitted by a sensor are misaligned with those of an adjacent sensor, so as to prevent interferences.
  • the detection device 30 (or sensors inside the casing) is inclined so that the main emission direction E of the rays is incident, not orthogonal to the direction of advancement of the rovings ( figure 10 ).
  • the detection devices are misaligned on an equatorial plane identified by the ideal trajectory of the rovings R.
  • the roving breakage detection system 20 comprises at least one divider 100 suitable for forming a barrier to the emission of a sensor, so that one sensor does not interfere with the other sensors.
  • said divider 100 is a wall opaque to the rays emitted by the photocell and is positioned between one sensor and the adjacent sensor, so as to intercept the rays emitted by said sensor, preventing it from interfering with the adjacent sensor ( figure 9 ).
  • the detection system for a roving frame according to the present invention makes it possible to considerably reduce realisation costs, in that the sensors used are commercially available.
  • the detection device occupies a very limited space, without obstructing the positioning of the other components of the roving frame.
  • the sensors are positioned so as not to interfere with each other, and in particular, in such a way that the ray emitted by one sensor does not intercept the emission aperture of the adjacent sensor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)

Claims (14)

  1. Rovingrahmen (1) einer Spinnanlage, umfassend:
    - eine Ziehvorrichtung (12), die wenigstens zwei druckgekoppelte Rollenpaare umfasst, die dazu geeignet ist, ein Netz (W) zu ziehen und einen Roving (R) herzustellen;
    - erste Bewegungsmittel zum Bewegen der Rollen der Ziehvorrichtung;
    - eine der Ziehvorrichtung (12) nachgelagerte Wickelvorrichtung (14) zum Wickeln des Rovings (R) auf Spulen (S);
    - zweite Bewegungsmittel für die Wickelvorrichtung;
    - einen dazwischenliegenden Bereich (19), welcher der Ziehvorrichtung (12) nachgelagert und der Wickelvorrichtung (14) vorgelagert angeordnet ist, der von dem Roving (R) während normaler Bearbeitung durchquert wird;
    - ein System zum Erfassen von Brüchen des Rovings (20), umfassend:
    a) Erfassungsvorrichtungen (30), die in einer abnehmbaren Weise mit dem Rahmen (10) des Rovingrahmens (1) verbunden sind, die eine Mehrzahl an Sensoren umfassen, die in dem dazwischenliegenden Bereich angeordnet sind;
    b) eine Verarbeitungsvorrichtung (50), die mit jedem Sensor verbunden ist, die zum Aufnehmen des Primitivsignals (Sp) und zum Aussenden eines verarbeiteten Signals geeignet ist, die imstande ist, gemäß einem Tiefpassfilter oder einem Timer auf das Primitivsignal (Sp) einzuwirken;
    - eine Regel-/Steuervorrichtung (70), die betriebsmäßig mit den Verarbeitungsvorrichtungen (50) gekoppelt ist, um die verarbeiteten Signale aufzunehmen, und mit den ersten und zweiten Bewegungsmitteln, um Rückmeldesignale an diese zu senden und die Ziehvorrichtung (12) und die Wickelvorrichtung (14) bei dem Vorhandensein eines verarbeiteten Signals, das einen Bruch des Rovings anzeigt, anzuhalten;
    dadurch gekennzeichnet, dass jede Erfassungsvorrichtung (30) zwischen zwei Rovings (R) gelegen ist und umfasst:
    - ein Paar Sensoren, wobei jeder mit einem Roving (R) verbunden ist und jeder dazu geeignet ist, das Vorhandensein des Rovings (R) in einer jeweiligen Erfassungszone des dazwischenliegenden Bereichs zu erfassen und ein jeweiliges Primitivsignal (Sp) auszusenden;
    - ein Gehäuse (32), in dem die Sensoren aufgenommen sind, das längsseits gegenüberliegende Öffnungen (34) aufweist, aus welchen die Sensoren herausragen,
    und wobei die Sensoren in dem Gehäuse (32) angeordnet sind oder das Gehäuse (32) an den Rahmen (10) angebaut ist, sodass die Richtung der Emission (E) der von einem Sensor ausgesendeten Strahlen nicht fluchtend mit denen eines benachbarten Sensors sind, um Störungen zu verhindern.
  2. Rovingrahmen (1) einer Spinnanlage nach Anspruch 1, ferner umfassend:
    c) eine Vergleichsvorrichtung (55), die mit den Verarbeitungsvorrichtungen (50) gekoppelt ist, die dazu geeignet ist, die verarbeiteten Signale von den Verarbeitungsvorrichtungen aufzunehmen und ein Vergleichssignal (Sc) zu erzeugen, welches das Vorhandensein eines Bruchs anzeigt, wenn wenigstens eines der verarbeiteten Signale das Vorhandensein eines Bruchs anzeigt;
    und wobei die Regel-/Steuervorrichtung (70) betriebsmäßig mit der Vergleichsvorrichtung (55) gekoppelt ist, um das Vergleichssignal (Sc) aufzunehmen, und mit den ersten und zweiten Bewegungsmitteln, um Rückmeldesignale an diese zu senden und die Ziehvorrichtung (12) und die Wickelvorrichtung (14) bei dem Vorhandensein wenigstens eines Vergleichssignals, welches das Vorhandensein eines Bruchs des Rovings anzeigt, anzuhalten.
  3. Rovingrahmen nach Anspruch 2, wobei verschiedene Vergleichsvorrichtungen (55) bereitgestellt sind, wobei jede Vergleichsvorrichtung mit nur einer vordefinierten Anzahl an Verarbeitungsvorrichtungen (50) verbunden ist.
  4. Rovingrahmen nach einem der vorhergehenden Ansprüche, wobei die Sensoren digital sind.
  5. Rovingrahmen nach einem der vorhergehenden Ansprüche, wobei der Sensor eine Fotozelle ist, und wobei die Fotozelle ein Kontaktsensor oder eine Hintergrundausblendungs-Fotozelle ist.
  6. Rovingrahmen nach einem der vorhergehenden Ansprüche, wobei das Gehäuse eine Hülle (32a) und eine Abdeckung (32b), aus Kunstoffmaterial, umfasst, die dazu geeignet sind, das Gehäuse zu bilden, welches die Sensoren aufnimmt.
  7. Rovingrahmen nach einem der vorhergehenden Ansprüche, wobei die Sensoren in einer solchen Weise in dem Gehäuse angeordnet sind, dass die Richtung einer Emission des Sensors in Relation zu einer horizontalen Richtung geneigt ist, insbesondere die Richtung einer Emission (E) nach unten in Richtung einer Emission geneigt ist.
  8. Rovingrahmen nach Anspruch 7, wobei die Richtung einer Emission in einem Winkel von 1° bis 4° geneigt ist, vorzugsweise 1° bis 3°, vorzugsweise gleich 2°.
  9. Rovingrahmen nach einem der vorhergehenden Ansprüche, wobei das Rovingbruch-Erfassungssystem Leucht-Signalmittel umfasst, die mit den Sensoren gekoppelt sind, die dazu geeignet sind, das Vorhandensein und/oder Nicht-Vorhandensein des Rovings zu signalisieren.
  10. Rovingrahmen nach Anspruch 9, wobei die Signalmittel eine vorhandene LED (42) umfassen, die zum Beispiel in dem dazwischenliegenden Bereich (19) vorzugsweise oberhalb des Tisches (11) des Rahmens (10) angeordnet ist.
  11. Rovingrahmen nach Anspruch 9 oder 10, wobei einzelne Signalmittel betriebsmäßig mit einer Mehrzahl an Sensoren gekoppelt sind, um den durch einen der Sensoren erfassten Bruch zu signalisieren.
  12. Rovingrahmen nach einem der vorhergehenden Ansprüche, wobei die Hauptemissionsrichtung der von einem Sensor ausgesendeten Strahlen so geneigt ist, dass sie einfallend zu der Beförderungsrichtung der Rovings ist, die in der Beförderungsrichtung der Rovings oder in der entgegengesetzten Richtung gedreht ist.
  13. Rovingrahmen nach Anspruch 12, wobei die Hauptemissionsrichtung der von einem Sensor ausgesendeten Strahlen auf einer äquatorialen Ebene liegt, die durch die ideale Bewegungsbahn der Rovings (R) ermittelt wird.
  14. Rovingrahmen nach einem der vorhergehenden Ansprüche, wobei das Rovingbruch-Erfassungssystem (20) wenigstens einen Teiler (100) umfasst, der dazu geeignet ist, eine Barriere für die Emission eines Sensors zu bilden, sodass ein Sensor die anderen Sensoren nicht beeinträchtigt, und wobei der Teiler (100) eine Wand ist, die für die von einem Sensor ausgesendeten Strahlen opak ist, und zwischen einem Sensor und dem benachbarten Sensor angeordnet ist, um die von einem Sensor ausgesendeten Strahlen zu unterbrechen, indem sie daran gehindert werden, den benachbarten Sensor zu beeinträchtigen.
EP12162700.4A 2011-06-01 2012-03-30 System zum Erkennen von Rovingbrüchen in einem Rovingrahmen Active EP2530191B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000081A ITBS20110081A1 (it) 2011-06-01 2011-06-01 Sistema di rilevazione rottura stoppino di un banco a fusi
IT000112A ITBS20110112A1 (it) 2011-08-05 2011-08-05 Sistema di rilevazione rottura stoppino di un banco a fusi

Publications (2)

Publication Number Publication Date
EP2530191A1 EP2530191A1 (de) 2012-12-05
EP2530191B1 true EP2530191B1 (de) 2015-11-18

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EP (1) EP2530191B1 (de)
CN (1) CN102808254B (de)
BR (1) BR102012012608B1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103510216A (zh) * 2013-09-17 2014-01-15 吴江永固纺配有限公司 一种带有剪断装置的并线机断纱检测系统
ITUB20155174A1 (it) * 2015-10-26 2017-04-26 Marzoli Machines Textile Srl Banco a fusi di una linea di filatura
IT201900002101A1 (it) * 2019-02-13 2020-08-13 Marzoli Machines Textile Srl Banco a fusi modulare
CN111498600B (zh) * 2020-04-28 2022-08-05 张家港扬子纺纱有限公司 一种高效便捷纺蒸一体工艺

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4300342A (en) * 1979-12-05 1981-11-17 El-Trol, Inc. Roving frame stop apparatus
JPS5777329A (en) * 1980-10-27 1982-05-14 Daiwa Spinning Co Ltd Sensing method for number of yarn breakage in spinning frame
CH658080A5 (en) * 1982-12-09 1986-10-15 Witschi & Co Apparatus for the optoelectronic monitoring of an individual roving between the drafting unit and spindle of a flyer
CN201010713Y (zh) * 2006-09-27 2008-01-23 苏拉有限及两合公司 粗纱机

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EP2530191A1 (de) 2012-12-05
BR102012012608B1 (pt) 2020-09-29
CN102808254B (zh) 2016-12-07
BR102012012608A2 (pt) 2013-06-18
CN102808254A (zh) 2012-12-05

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