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EP1708947B1 - Dispositif pour detecter un fil - Google Patents

Dispositif pour detecter un fil Download PDF

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Publication number
EP1708947B1
EP1708947B1 EP04804371A EP04804371A EP1708947B1 EP 1708947 B1 EP1708947 B1 EP 1708947B1 EP 04804371 A EP04804371 A EP 04804371A EP 04804371 A EP04804371 A EP 04804371A EP 1708947 B1 EP1708947 B1 EP 1708947B1
Authority
EP
European Patent Office
Prior art keywords
recess
thread
suction pipe
measuring field
receiver
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
EP04804371A
Other languages
German (de)
English (en)
Other versions
EP1708947A1 (fr
Inventor
Erwin Peters
Thomas Wegmann
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.)
Oerlikon Textile GmbH and Co KG
Original Assignee
Oerlikon Textile GmbH and Co KG
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 Oerlikon Textile GmbH and Co KG filed Critical Oerlikon Textile GmbH and Co KG
Publication of EP1708947A1 publication Critical patent/EP1708947A1/fr
Application granted granted Critical
Publication of EP1708947B1 publication Critical patent/EP1708947B1/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
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
    • B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
    • B65H63/036—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the combination of the detecting or sensing elements with other devices, e.g. stopping devices for material advancing or winding mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/08—Automatic end-finding and material-interconnecting arrangements
    • B65H67/081—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement
    • B65H67/085—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement end-finding at the take-up package, e.g. by suction and reverse package rotation
    • 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 device for detecting a thread in the detection of yarn ends in an air-flow suction pipe with a transmitter and a receiver comprising a sensor device for detecting a yarn having the features of the preamble of claim 1.
  • suction tubes are equipped, for example, with devices for detecting a thread in order to detect the detection of the package side or the package side thread end, which is to be fed to a thread connecting device at a winding station.
  • suction tubes are equipped with such a device, which are used on Kopsvorpungs wornen to determine whether the thread, which should then be prepared at a suitable location for later detection in the winding unit, could be detected.
  • further steps are then initiated depending on the type of preparation device.
  • a device for detecting a thread in an air-flow channel is known.
  • the channel is part of a suction device for detecting the package-side thread at a winding unit.
  • mutually aligned openings for receiving a sensor arrangement formed from a radiation source and a receiver are present in the pipe wall opposite one another.
  • This sensor arrangement forms a light barrier crossing the channel, whose interruption by the Thread is detectable.
  • the facing lenses in the form of lenses pollute depending on the load of the thread with impurities after a certain Hinsatzdauer, whereby the reliability of the measurement decreases. This pollution is due to the air flow on a pipe elbow even stronger than the other channel parts.
  • the DE 21 63 210 A1 shows a device for stripping a certain length of yarn from a yarn supply.
  • a thread In a tube, the presence of a thread is detected by means of a light source and a photocell.
  • the arrangement of light source and photocell on a pipe elbow, the distance between the light source and photocell is significantly larger than the diameter of the tube.
  • the position of the light source in an angular range of the tube with weaker air flow promotes rapid contamination of the light source. Both the large distance and the pollution cause a weakening of the signals of the sensor device.
  • the detection of the thread is hampered or even completely prevented.
  • From the DE 12 76 523 B is a pneumatic device for locating and removing the thread beginning of a textile Spulc known in which the thread is sucked by means of a suction tube.
  • the tube has a longitudinal slot through which the thread is guided in a zone outside the tube.
  • a measuring device is arranged. The measuring device detects the presence of the thread- In the zone outside the tube dirt is released from the thread, in particular finishing, short fibers or thread abrasion caused at the deflection edge at the beginning of the slot.
  • the measuring device is dirty and is subject to malfunction or malfunction. Through the slot will False air sucked into the pipe. This results in power losses of the suction. The air flow is disturbed and weakened.
  • the education-forming DE 43 08 058 A1 describes a device especially for use on Kopsvorpungs wornen or feeder to a Fadenvoritatisainraum, the channel cross-section is monitored by means of a sensor device.
  • the transmitter and the receiver of the sensor arrangement are arranged outside mutually aligned openings of a channel. Between the exit of the openings and the. Radiation source or the receiver is in each case an air gap. Due to the external sensor contact with the thread or with the surrounding him Saugluftströmung is avoided in the channel.
  • the distance between transmitter and EmpLlinder is at least as large as the channel diameter. This requires a more elaborate sensor device, if no compromises in thread recognition are to be accepted.
  • the thread is guided so that it moves in the measuring field at a distance from the wall of the suction tube and is well positioned in the measuring field. Due to its "flapping motion" across its direction, the thread can be recognized particularly easily and safely.
  • Transmitter and receiver are arranged so that the recess runs between them. As a result, a distance between transmitter and receiver can be realized, which is significantly smaller than the diameter of the suction tube. This transmitter and receiver can be used in a simple, cost-effective design, while a secure thread detection is guaranteed.
  • the wall of the suction tube at the beginning and end of the recess forms the guide of the detected thread and is always determined by the leadership thread course of the detected thread within the suction tube, wherein the thread within the Well is stretched and the thread path within the depression traverses the measuring field and is at least partially spaced from the bottom of the recess, in a simple manner, a distance between the thread and the bottom of the suction tube within the measuring field located in the depression can be achieved.
  • the measuring field between transmitter and Receiver runs through holes aligned with each other, which break through the wall of the suction tube, it is advantageous to form the suction pipe in the region of the sensor device so that no disturbances occur through openings in the wall of the suction tube, which can also form deposits.
  • the suction tube is closed and transparent. A koslen ownede execution of a transparent suction tube is made possible by the use of polypropylene as a transparent material.
  • the recess is narrow, not only a small distance between transmitter and receiver is adjustable, but the wall of the suction tube is cleaned by the movement of the thread and thus counteracts the deposition of dirt.
  • FIG. 1 shows a winding unit of a textile machine producing cross-wound bobbins.
  • Figure 1 illustrates a situation at the winding unit 1, in which the yarn path has been interrupted after a thread cut due to a Garnfigs and measures for removing the Garn Cons, a so-called cleaning, have been initiated.
  • the yarn path during operation of the winding unit 1 has been indicated by the dashed line 2.
  • the winding unit 1 the thread is withdrawn from a thread source, not shown.
  • the thread source may be a delivery bobbin or a spinning device.
  • the thread is wound onto a cross-wound bobbin 3 serving as a package.
  • the erroneous piece of thread that has accumulated on the cheese 3 must be so completely unwound from this that is at a section of the thread of the yarn defect in the cut thread part.
  • the cheese 3 has already been lowered back to the winding roller 4 in the illustration of Figure 1.
  • the cross-wound bobbin 3 is held by a bobbin holder 5, which is mounted in a rotary joint 6 in the machine frame 7, which is only indicated here.
  • the operation of the drive of the coil holder 5, not shown here, is controlled by the control device 8 via the line 9.
  • the winding roller 4 is driven by a drive, not shown here, which is also connected via the line 10 to the control device 8.
  • the winding roller 4 In order to unwind the faulty piece of thread, the winding roller 4 is driven against the winding direction, according to the arrow 11, and drives the resting with its peripheral surface 12 cheese 3 in the unwinding 13 at.
  • a suction nozzle 14 Before the peripheral surface 12 of the cheese 3, a suction nozzle 14 has positioned with its mouth 15.
  • the suction nozzle 14 is mounted in the swivel joint 16 in the machine frame 7, wherein in the rotary joint 16 via a suction pipe 17, the connection to the central suction channel 18 of the vacuum supply of the textile machine.
  • the pivoting movement of the suction nozzle 14 is effected by a drive, not shown here, which is connected via a line 19 to the control device 8.
  • a valve not shown here is also actuated, whereby the suction pipe 17 is acted upon by the suction channel 18 with negative pressure.
  • the thread end 21 has reached a sensor device 22 arranged in the suction tube 17.
  • the presence of the thread end 21 in the suction tube 17 is detected by the sensor device 22 and reported via line 23 to the control device 8.
  • the yarn end 21 is checked whether at this time the yarn end 21 has already been unwound from the package so far that the detected by the cleaner 24 error has already been handled by the cheese 3 again. If this is the case, the unwinding and suction of the yarn end 21 is stopped.
  • the yarn end 21 is held by the negative pressure in the suction nozzle 14.
  • FIG. 2 shows a curvature 25 of the suction tube 17 with the sensor device 22.
  • the measuring field 26 of the sensor device 22 is arranged in the vicinity of the smaller radius of the curvature 25 of the suction tube 17.
  • the suction tube 17 has a recess 27 aligned in the direction of travel.
  • the yarn end 21 is detected by the flowing in the direction of arrow 28 air flow and tightened in the region of the recess 27.
  • the thread end 21 bears against the part of the wall 29 of the suction tube 17 located at the smaller radius, while it is spaced from the base 30 of the recess 27 in the tightened state.
  • the recess 27 begins in the flow direction very gradually in the course of the curvature 25, whereby the air flow is not or only slightly disturbed.
  • the thread end 21 can be set in vibration by the air flow. By such a "flapping motion", the thread end can be safely and easily recognized, wherein the sensor device is designed as a motion detector.
  • FIG 3 shows the suction tube 17 and the sensor device 22 in the view AA of Figure 2.
  • the recess 27 is narrow.
  • the sensor device 22 has a transmitter 31 and a receiver 32 and two holding arms 33.
  • the transmitter 31 is as a light source and the Receiver 32 designed as a photosensor.
  • the holding arms 33 are at least partially elastic. Such an embodiment of the sensor device 22 can be quickly positioned by simply placing it on the suction tube 17.
  • the sensor device 22 is positioned in the illustration of Figure 3 so that the recess 27 is in the measuring field 26 between the transmitter 31 and receiver 32.
  • the distance between transmitter 31 and receiver 32 is substantially smaller than the diameter of the suction tube 17. Due to the proximity of transmitter 31 and receiver 32 is always a reliable detection of the yarn end guaranteed.
  • the air flow can move the thread end 21 transversely to the direction of travel. This movement makes use of an alternative embodiment of the sensor device 22, in which the sensor device 22 is designed as a motion detector.
  • the thread end 21 can by its movements transverse to the direction of the sidewalls of the recess 27 or come so close to it that a cleaning of the surface of the suction tube 17 takes place in this area. As a result, contamination of the surface in the measuring field 26 is counteracted.
  • the suction pipe 17 may for example be formed so that it has an outer diameter of 50 mm and a wall thickness of 2 mm, wherein the distance between the side walls of the recess 27 may be designed with 6 mm.
  • the suction tube 17 according to the invention can be made of transparent polypropylene.
  • the suction pipe 17 may further be formed so that the cross section of the suction pipe 17 in the pipe section having the recess 27 is maintained substantially equal to the pipe sections with a circular cross section. If, in the course of the air flow in the suction pipe 17, there is a location with a smaller or the narrowest cross-section downstream of the measuring field 26, the yarn end 21 in the measuring field 26 is subjected to particularly good yarn tension.
  • the recess 27 can already begin far in front of the measuring field 26 in the suction tube 17 and end well after the measuring field 26 in order to facilitate a very gradual change in the cross-sectional shape of the suction tube 17. In a gradual change in the cross-sectional shape, the air flow is not or hardly disturbed.
  • the detection of the thread end 21 is improved by means of the device according to the invention. This contributes to a higher productivity of the textile machine, because the faster and safer the detection of the thread end 21 can take place, the sooner, for example, for a piecing process following phases of the process can be started and the lower the risk of having to repeat the entire piecing process because the thread end 21 was not or insufficiently detected by the suction nozzle 14.
  • thread end comprises the portion of the thread withdrawn from the cheese 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Looms (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

L'invention concerne un dispositif servant à détecter un fil lors de la saisie d'extrémités de fil (21) dans un tube d'aspiration (17) à écoulement d'air. Le dispositif selon l'invention comprend un dispositif de capteur (22) constitué d'un émetteur (31) et d'un récepteur (32) et placé sur une machine textile produisant des bobines croisées. Un champ de mesure (26) est formé entre l'émetteur (31) et le récepteur (32) et le tube d'aspiration présente une courbure dans la zone du champ de mesure (26). Le champ de mesure (26) est placé à proximité du plus petit rayon du tube d'aspiration (17) qui présente une cavité (27) orientée dans le sens d'écoulement du tube d'aspiration (17) pour la réalisation du champ de mesure (26). Le tube d'aspiration (17) présente, en amont et en aval du champ de mesure (26), une courbure telle que le fil détecté à l'intérieur de la cavité (27) est tendu de façon à s'écarter au moins partiellement du fond de la cavité (27) dans le champ de mesure (26). Il est ainsi possible de détecter le fil de manière simple et sûre.

Claims (6)

  1. Dispositif destiné à détecter un fil lors de la détection d'extrémités de fils dans un tuyau d'aspiration (17) traversé par de l'air muni d'un dispositif détecteur comportant un émetteur et un récepteur, un champ de mesure (26) étant formé entre l'émetteur et le récepteur et le tuyau d'aspiration (17) présentant une courbure dans la zone du champ de mesure,
    caractérisé en ce
    que, pour la configuration du champ de mesure, le tuyau d'aspiration (17) présente un évidement allongé (27) au niveau du rayon de courbure plus petit, lequel évidement est orienté dans le sens du tuyau d'aspiration (17), en ce que l'évidement (27) dans la paroi du tuyau d'aspiration (17) est courbé vers l'extérieur et en forme de rigole, en ce que l'émetteur et le récepteur sont disposés respectivement au niveau de parois latérales opposées de l'évidement (27), en ce qu'au moins le début de l'évidement (27) se trouve dans la zone de courbure du tuyau d'aspiration (17), en ce que la paroi du tuyau d'aspiration (17) forme le guidage du fil détecté au début et à la fin de l'évidement (27) et en ce que le chemin du fil détecté déterminé par le guidage se trouve toujours à l'intérieur du tuyau d'aspiration (17), en ce que chemin du fil à l'intérieur de l'évidement (27) traverse le champ de mesure (26) et en ce que le fil à l'intérieur de l'évidement (27) est tendu par la courbure du tuyau d'aspiration en amont et en aval du champ de mesure, de telle sorte qu'il est au moins partiellement éloigné du fond (30) de l'évidement (27).
  2. Dispositif selon la revendication 1, caractérisé en ce que les parois latérales de l'évidement (27) s'étendent mutuellement au moins approximativement parallèlement dans la zone du champ de mesure (26).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la paroi du tuyau d'aspiration (17) est fermée et transparente.
  4. Dispositif selon la revendication 3, caractérisé en ce que l'on utilise du polypropylène comme matériau transparent.
  5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'évidement (27) est formé de telle sorte que le passage dans le sens de l'écoulement entre le début de l'évidement (27) et la pleine profondeur de l'évidement (27) se déroule si graduellement que l'écoulement d'air n'est pas dérangé ou ne l'est que de manière non essentielle.
  6. Dispositif selon l'une quelconque de revendications 1 à 5, caractérisé en ce que l'évidement (27) est conçu de manière si étroite que le déplacement du fil provoque un nettoyage de la paroi du tuyau d'aspiration (17) dans le champ de mesure (26).
EP04804371A 2004-01-22 2004-12-29 Dispositif pour detecter un fil Expired - Lifetime EP1708947B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004003174A DE102004003174A1 (de) 2004-01-22 2004-01-22 Vorrichtung zum Erkennen eines Fadens
PCT/EP2004/014785 WO2005070800A1 (fr) 2004-01-22 2004-12-29 Dispositif pour detecter un fil

Publications (2)

Publication Number Publication Date
EP1708947A1 EP1708947A1 (fr) 2006-10-11
EP1708947B1 true EP1708947B1 (fr) 2007-11-14

Family

ID=34744976

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04804371A Expired - Lifetime EP1708947B1 (fr) 2004-01-22 2004-12-29 Dispositif pour detecter un fil

Country Status (5)

Country Link
US (1) US7504617B2 (fr)
EP (1) EP1708947B1 (fr)
CN (1) CN100542924C (fr)
DE (2) DE102004003174A1 (fr)
WO (1) WO2005070800A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012005988A1 (de) 2012-03-23 2013-09-26 Oerlikon Textile Gmbh & Co. Kg Verfahren zum Betreiben einer Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine
CN105473480B (zh) * 2013-08-29 2018-01-02 村田机械株式会社 纱线拉出装置、纱线卷取装置以及接头方法
JP2015148035A (ja) * 2014-02-10 2015-08-20 村田機械株式会社 糸捕捉装置、及び、糸巻取機
DE102014009203A1 (de) * 2014-06-20 2015-12-24 Saurer Germany Gmbh & Co. Kg Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine
DE102014012419A1 (de) * 2014-08-21 2016-02-25 Saurer Germany Gmbh & Co. Kg Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine
JP2017141106A (ja) * 2016-02-12 2017-08-17 村田機械株式会社 糸監視装置
JP2017141107A (ja) * 2016-02-12 2017-08-17 村田機械株式会社 糸監視装置
DE102016112641A1 (de) * 2016-07-11 2018-01-11 Rieter Ingolstadt Gmbh Spulstelle mit einer bewegbaren Deckeinheit
DE102016115731A1 (de) * 2016-08-24 2018-03-01 Saurer Germany Gmbh & Co. Kg Saugvorrichtung zum Einsaugen eines Fadenendes eines auf einer Auflaufspule aufgespulten Fadens und Verfahren zum sensorischen Überwachen eines Saugkanalabschnitts der Saugvorrichtung
DE102017122851A1 (de) * 2017-10-02 2019-04-04 Maschinenfabrik Rieter Ag Vorrichtung zum Ansetzen eines Fadens an einer Arbeitsstelle einer Textilmaschine mit einer Saugdüse und mit einem Zubringerorgan
DE102018125327A1 (de) * 2018-10-12 2020-04-16 Saurer Spinning Solutions Gmbh & Co. Kg Fadenrohr für eine Auflaufspulen herstellende Textilmaschine

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DE1147156B (de) * 1959-05-15 1963-04-11 Schweiter Ag Maschf Saugduese zum Aufsuchen und Erfassen von Fadenenden an einer Spulmaschine
DE1276523B (de) 1961-12-11 1968-08-29 Reiners Walter Dr Ing Pneumatische Vorrichtung zum Aufsuchen und Abziehen des Fadenanfanges einer Textilspule
US3728550A (en) 1971-10-20 1973-04-17 Maremont Corp Device and method for detecting and withdrawing a predetermined length of yarn
DE2531044C2 (de) 1975-07-11 1986-04-30 W. Schlafhorst & Co, 4050 Mönchengladbach Vorrichtung zum Suchen eines Fadenendes auf einer Spule
DE3833258A1 (de) * 1988-09-30 1990-04-05 Schlafhorst & Co W Verfahren und vorrichtung zum vorbereiten von kopsen fuer eine spulmaschine
DE4308058A1 (de) * 1993-03-13 1994-09-15 Schlafhorst & Co W Vorrichtung zum Erkennen eines Fadens in einem luftdurchströmten Kanal
DE4424462A1 (de) * 1994-07-12 1996-01-18 Schlafhorst & Co W Vorrichtung zum Bereitlegen des Fadenendes an Spinnkopsen für den nachfolgenden Abspulprozeß an einer Spulmaschine
DE19640184B4 (de) * 1996-09-30 2005-10-13 Saurer Gmbh & Co. Kg Verfahren zum Ausreinigen von Garnfehlern an einer Spulstelle einer Spulmaschine
JP4756411B2 (ja) * 1998-03-25 2011-08-24 ウステル・テヒノロジーズ・アクチエンゲゼルシヤフト 長手方向に運動するテスト品の特性を測定する装置
DE10123834A1 (de) * 2001-05-16 2002-11-21 Schlafhorst & Co W Vorrichtung zum Aufwickeln eines laufenden Fadens auf eine Auflaufspule an einer Arbeitsstelle einer Textilmaschine

Also Published As

Publication number Publication date
WO2005070800A1 (fr) 2005-08-04
CN1902115A (zh) 2007-01-24
US7504617B2 (en) 2009-03-17
DE102004003174A1 (de) 2005-08-11
EP1708947A1 (fr) 2006-10-11
CN100542924C (zh) 2009-09-23
US20080217462A1 (en) 2008-09-11
DE502004005542D1 (de) 2007-12-27

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