EP2741988A2 - Procédé et métier à tisser muni d'un dispositif de surveillance d'une surtension des fils - Google Patents

Procédé et métier à tisser muni d'un dispositif de surveillance d'une surtension des fils

Info

Publication number
EP2741988A2
EP2741988A2 EP12745803.2A EP12745803A EP2741988A2 EP 2741988 A2 EP2741988 A2 EP 2741988A2 EP 12745803 A EP12745803 A EP 12745803A EP 2741988 A2 EP2741988 A2 EP 2741988A2
Authority
EP
European Patent Office
Prior art keywords
threads
thread
group
warp
weaving machine
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
EP12745803.2A
Other languages
German (de)
English (en)
Other versions
EP2741988B1 (fr
Inventor
Adnan Wahhoud
Harald Arnold
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.)
Lindauer Dornier GmbH
Original Assignee
Lindauer Dornier GmbH
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 Lindauer Dornier GmbH filed Critical Lindauer Dornier GmbH
Publication of EP2741988A2 publication Critical patent/EP2741988A2/fr
Application granted granted Critical
Publication of EP2741988B1 publication Critical patent/EP2741988B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/12—Stationary elements arranged to deflect material from straight path
    • 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
    • B65H63/04—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to excessive tension or irregular operation of apparatus
    • 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 present invention relates to a method and a weaving machine with a device for monitoring a yarn overstress on the loom.
  • Contact is triggered further operations on the loom, for example, a machine stop.
  • Devices of this type are generally between a thread supply for the warp threads - e.g. a warp beam - and means for forming a shed - e.g. Shafts - arranged in the course of the thread. They are used to recognize torn or sticking, so-called clinging warp threads. A monitoring of voltage peaks in one of the threads extending in the warp direction is thus not possible in the prior art.
  • Voltage overshoots can occur, for example, as a result of a disturbed thread course in the shed in the weft insertion area of the weaving machine.
  • the eligible weft insertion area of the loom is called
  • the front compartment is formed of at least two sets of warp threads extending from the shed forming elements through the reed to the binding point of the fabric. These two groups of warp threads are alternately moved in such a way in a top compartment and in a lower compartment, that in the resulting space weft threads can be entered.
  • the yarns of the front compartment running in the warp direction can, under certain circumstances, be introduced from the weft insertion elements in the weft insertion
  • This process can be triggered, for example, by the tension in one of the warp threads first dropping to such an extent that no signal from the warp guard is thereby released, so that the weaving machine continues to run. Due to the sinking tension, this thread sags
  • the present invention aims to automatically detect such operations on the loom.
  • the method according to the invention serves to monitor a yarn overstress in a weaving machine with mechanical weft insertion elements.
  • weft insertion elements e.g. Gripper or projectile - is in a known manner a weft in the weft direction in a shed of the
  • the threads running in the warp direction are withdrawn from a thread supply - eg a warp beam -, passed over a thread monitor and then fed to elements for shedding. Due to the movement of the compartmentalized elements, the warp threads form a shed with a top compartment and a bottom compartment. When falling below a certain
  • Tension in one of the warp threads is controlled by the thread monitor - e.g. one
  • Warp stopper according to the prior art - generates a signal. This signal can be used, for example, to stop the machine immediately.
  • the method according to the invention is characterized in that at least one group of yarns extending in the warp direction between the yarn supply and the shed forming elements is guided over an elastically deflectable Fadenumlenkelement that when exceeding a certain voltage in one of the threads of this group by an elastic deflection of the Fadenumlenkelements the voltage is reduced in at least one other thread of this group such that the thread monitor generates a signal.
  • the increase in tension in the one warp thread of a group can occur, for example, as a result of this thread being caught by, deflected by, or deflected about by one of the weft insertion elements.
  • the weaving machine can be stopped immediately before this process to further weft insertion disorders or
  • Thread monitor be generated.
  • this base thread tension already leads to an elastic deflection of the thread deflecting element in the direction in which the threads are deflected, so that an additional elastic deflection of the thread is induced by an additional increase in tension in one of these threads Thread deflecting element is caused in this direction.
  • the basic thread tension of the entire group of warp threads is advantageously produced in a known manner by electromechanical means for warp tension control of the weaving machine. Depending on how large this warp tension is, the Fadenumlenkelement over which the group of warp threads is guided, more or less strongly elastically deflected already by the fluctuating ground tension or Grundkettschreib.
  • this deflection in addition to the function according to the invention, even in the entire group of warp threads a compensation of the voltage changes which are produced by the shed forming elements moving up and down can be achieved.
  • An advantageous embodiment of the invention is characterized in that the number of guided over the Fadenumlenkelement group of warp threads are tuned in a certain way to the elasticity of the deflected threads and the elasticity and the formation of the Fadenumlenkelements.
  • the vote takes place in such a way that starting from an undisturbed position of the threads of this Kettfad enbericht in a top compartment or in a sub-compartment disturbing the thread path by an additional deflection of one of these threads to the weft insertion element to such a voltage increase in this additional deflected thread leads that through the following
  • additional deflection is meant a threadline, in which a warp thread, which should extend straight above or below the weft insertion element from the associated shedding element to a binding point of the fabric, instead extends from the shedding element to a lower or upper edge of the weft insertion element and from there to the binding point.
  • a warp thread in the upper shed is deflected so far from the weft insertion element that he gets here in places in the lower shed, while a warp thread in the lower shed at the additional deflection by the weft insertion points in places reaches the upper shed.
  • Base voltage is deflected.
  • An advantageous embodiment of the method according to the invention is therefore characterized in that a group running in the warp direction threads, which are guided over the elastically deflectable Fadenumlenkelement, consists of 2 - 20 threads.
  • the method according to the invention can be used particularly advantageously in the case of very stiff, robust warp threads which, upon collision with a weft insertion element, cause considerable disturbances. This applies above all to warp threads of ribbon or wire-like material, but also very robust threads of aramid or carbon fibers. Because of the above-described relationships between the elasticity of the warp threads and the number of threads in a group, which are guided over a common Fadenumlenkelement, results in very stiff, low-stretch warp threads and a smaller number of individual Fadenumlenkmaschinen for a given total number of warp threads on a loom ,
  • the method described for the monitoring of thread overstress in warp threads can of course also be used for the monitoring of leno or ground threads in the manufacture of fabrics with leno weave. In addition, it is applicable to the monitoring of warp yarns used for edge formation - e.g. Threads of a trap or a leno selvedge.
  • Thread overvoltages in one of the yarns running in the warp direction can, of course, also be due to causes other than the additional deflection by a weft insertion element. This can be for example
  • Inventive methods are detected and monitored.
  • a thread overstress in threads can be monitored, which extend substantially in the warp direction.
  • the device comprises means for storing the threads - e.g. Warp threads, as well as elements for shedding and at least one thread monitor, which is arranged in the course of the threads between the device for storing the threads and the shed forming elements and with which falls below a certain voltage in at least one of the thread monitor monitorable threads a signal can be generated.
  • a Fadenumlenkelement which is elastically deflectable and which is arranged between the means for storing the threads and the shed forming elements in the thread pattern of a group of threads, in
  • Fadenumlenkelements as well as the formation of Fadenumlenkelements in a certain way and tuned to the number and the elasticity of a group to be deflected in the warp direction extending threads.
  • This vote is done, for example, by the fact that the spring constant of a designed as Fadenumlenkelement elastically deformable spiral spring is chosen constructively suitable.
  • brush-like arrangements in which a rigid
  • Forming the Fadenumlenkelements in the examples described is carried out according to the invention, taking into account the number and elasticity of an im
  • Web process the loom existing group to be deflected threads such that starting from an undisturbed position of this group of warp threads in the upper compartment or in the lower part of the loom by an additional
  • Thread deflecting at least one thread guide element, with the running in the warp direction threads in the weft direction can be guided.
  • Thread deflecting at least one thread guide element, with the running in the warp direction threads in the weft direction can be guided.
  • Thread deflection is performed.
  • a large number of warp threads can be monitored, it is therefore advantageous if several Fadenumlenkieri are arranged distributed over the width of the loom for several groups of yarns running in the warp direction.
  • Fadenumlenketti are formed as a bending springs of contiguous sub-segments of a single spring plate.
  • FIG. 1 Schematic representation of an embodiment of
  • Figure 1 shows an example of a weaving machine according to the invention with a device for monitoring a yarn overstress.
  • the weaving machine has a gripper 1 for the entry of weft threads in a shed.
  • such weaving machines are also equipped with two grippers 1, one of which brings a weft thread to the center of the fabric 9, while the other pulls the weft thread from the center to the outside. From a warp beam, not shown, for example, above the
  • warp threads 2 are removable, which extend in the weaving machine substantially in the warp direction 20.
  • shedding elements 3 healds 3.1 are present in the present example, not shown above
  • FIG. 1 shows the weaving machine with warp threads 2, which are guided by the healds 3.1 in such a way that the warp threads 2 are brought alternately into a top shed 21 and into a bottom shed 22 by the movement of the shed forming elements 3.
  • a shingles drive can of course also a jacquard machine with a harness that moves the healds 3.1 shingles.
  • the loom further comprises a warp stop 4, which is arranged in the course of the warp threads 2 between the warp beam and shed forming elements 3.
  • the warp monitor 4 is preferred with Kettwumbleterlamellen 4.1. equipped, each of which is associated with one of the warp threads 2. But there are others too
  • Thread monitor principles e.g. optical systems can be used with which a sinking thread tension or caused thereby changed thread pattern of the threads 2 can be detected.
  • a base-chain tension in the warp threads 2 is set by means for controlling the warp tension.
  • Such warp tension controls are known in the art and are therefore not shown here.
  • Kettwumbleterlamelle 4.1 Fall below a certain thread tension or breakage of a warp 2 falls Kettwumbleterlamelle 4.1 on the contact rail 4.2 and closes an electrical contact. This generates a signal on the weaving machine.
  • the loom according to Figure 1 further comprises a spring plate 7, which consists of several sub-segments 7.1. Each subsegment 7.1 forms
  • the spring plate-like sub-segments 7.1 are elastically deformable, so that the Fadenumlenkelement 5 a deflection in the
  • Each Fadenumlenkelement 5 is arranged in the thread pattern of a group of warp threads 2.1, 2.2 between the warp beam and the shedding elements 3.
  • Thread tension occurs when the healds 3.1 are all at the same height, that is in the closed compartment of the loom.
  • the position of the Fadenumlenketti 5 and 4 of the warp monitor in the yarn path of the warp threads 2 is advantageous chosen so that the function described is guaranteed. This corresponds to the function and the procedure of the person skilled in a known in the art string tree device.
  • the weaving machine according to FIG. 1 furthermore has a reed 8, with which weft threads, which are entered by the gripper 1 into the shed, are struck against the binding point 24 of the fabric 9.
  • the spring stiffness of the spring plate 7 with the sub-segments 7.1 is matched to the number and the elasticity or elasticity of the threads 2, over the
  • Thread deflecting 5 are performed. In the present example, these are only two warp threads 2.1, 2.2, since a high extensibility of these warp threads 2 is assumed.
  • the bending stiffness of the spring plate 7 is rather low in this case, so that a small increase in voltage in one of the two warp threads 2.1 already to a significant additional deflection of the Fadenumlenkiatas 5 and thus to a sufficiently high voltage reduction in the other
  • Warp thread 2.2 of the group leads.
  • the elastic deflectability of the Fadenumlenkelements 5 is selected on the structural design of the flexural rigidity of the spring plate 7, starting from an undisturbed position of the warp thread 2.1 in the upper compartment 21 by an additional deflection of this warp thread 2.1 to the gripper 1 such a voltage increase in the warp 2.1 is generated, characterized in that the Fadenumlenkelement 5 is additionally sufficiently elastically deflected in order to cause a reduction in tension in the warp 2.2 through which the Kettwumbleterlamelle 4.1 falls on the contact rail 4.2 at Kettfadenwamba. This then triggers a signal on the weaving machine, with which the weaving machine is preferably stopped immediately.
  • the Fadenumlenk sculpture 5 of the loom of Figure 1 further have edge boundaries or thread guide elements 6, with which warp threads are prevented from slipping in the weft direction 23 from Fadenumlenkelement 5.
  • these are to be guided over the thread deflection elements 5 in accordance with the method described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

L'invention concerne un procédé permettant de surveiller une surtension des fils dans un métier à tisser comprenant des éléments mécaniques (1) d'insertion des fils de trame, ainsi qu'un métier à tisser muni d'un dispositif permettant la mise en œuvre dudit procédé. Selon l'invention, les fils (2) orientés dans le sens de la chaîne (20) sont amenés aux éléments de formation de la foule (3) à partir d'une réserve de fils en passant par un casse-fil (4), le casse-fil adressant un signal au métier à tisser en cas de dépassement d'une tension déterminée dans un des fils (2). L'invention est caractérisée en ce qu'au moins un groupe de fils (2.1, 2.2) orientés dans le sens de la chaîne (20) est guidé entre la réserve de fil et les éléments de formation de la foule (3) par l'intermédiaire d'un élément de renvoi des fils (5) pouvant dévier élastiquement de telle manière qu'en cas de dépassement d'une tension déterminée dans un des fils (2.1) dudit groupe (2.1, 2.2), l'élément de renvoi des fils (5) est dévié de telle manière que cette déviation réduit la tension dans au moins un autre fil (2.2) dudit groupe (2.1, 2.2) jusqu'à ce que le casse-fil (4) produise un signal.
EP12745803.2A 2011-08-08 2012-07-19 Procédé et métier à tisser muni d'un dispositif de surveillance d'une surtension des fils Not-in-force EP2741988B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011080629A DE102011080629A1 (de) 2011-08-08 2011-08-08 Verfahren und Webmaschine mit einer Vorrichtung zum Überwachen einer Fadenüberspannung
PCT/EP2012/064142 WO2013020782A2 (fr) 2011-08-08 2012-07-19 Procédé et métier à tisser muni d'un dispositif de surveillance d'une surtension des fils

Publications (2)

Publication Number Publication Date
EP2741988A2 true EP2741988A2 (fr) 2014-06-18
EP2741988B1 EP2741988B1 (fr) 2015-03-11

Family

ID=46642491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12745803.2A Not-in-force EP2741988B1 (fr) 2011-08-08 2012-07-19 Procédé et métier à tisser muni d'un dispositif de surveillance d'une surtension des fils

Country Status (6)

Country Link
EP (1) EP2741988B1 (fr)
JP (1) JP5829335B2 (fr)
KR (1) KR101557248B1 (fr)
CN (1) CN103717520B (fr)
DE (1) DE102011080629A1 (fr)
WO (1) WO2013020782A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6277006B2 (ja) * 2014-02-03 2018-02-07 津田駒工業株式会社 織機における経糸屈曲装置
KR101616413B1 (ko) 2015-04-06 2016-04-29 엘림스마트 주식회사 Iot 플랫폼 기반의 직조기 모니터링 및 관리 시스템
BR112020003726A2 (pt) * 2017-08-24 2021-03-23 Siddarth Lohia dispositivo e método de detecção de ponta de quebra ou fim do fio de urdidura em um tear para tecelagem de tecido
DE102018208222A1 (de) * 2018-05-24 2019-11-28 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Führungsvorrichtung für eine Webmaschine zur Führung wenigstens eines vorzugsweise bandförmigen Kettmaterials sowie Webmaschine mit einer Führungsvorrichtung
CN109023675B (zh) * 2018-08-24 2020-08-04 南通纺织丝绸产业技术研究院 一种智能调节经纱张力装置及其使用方法
FR3094380B1 (fr) * 2019-03-28 2022-01-07 Safran Aircraft Engines Contrôle du positionnement et de la continuité de fils dans un métier à tisser

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DE645803C (de) * 1935-06-09 1937-06-05 Guesken Fa J Florkettenfaedenwaechtereinrichtung, insbesondere fuer Doppelwarewebstuehle
GB828878A (en) * 1957-07-02 1960-02-24 Sagem Improvements in or relating to individual warp-tensioning devices for looms
JPS4620061Y1 (fr) * 1966-07-16 1971-07-12
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JPS51143742A (en) * 1975-06-03 1976-12-10 Tsudakoma Ind Co Ltd Method of detecting extraordinary tension of thread
DE7601606U1 (de) * 1976-01-22 1976-07-22 Oka-Teppichwerke Gmbh, 3250 Hameln Bewaechterungsvorrichtung fuer tuft- und webmaschinen sowie kettbaummaschinen
CH639151A5 (de) * 1979-09-03 1983-10-31 Saurer Ag Adolph Elektrische kettfadenwaechtervorrichtung an einer webmaschine.
DE3346030A1 (de) * 1983-12-20 1985-06-20 Institute für Textil- und Faserforschung Stuttgart, 7306 Denkendorf Webmaschine
NL8602410A (nl) 1986-09-24 1988-04-18 Picanol Nv Werkwijze om het al dan niet aanwezig zijn van aan elkaar gehechte kettingdraden te bepalen en weefmachine die deze werkwijze toepast.
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Also Published As

Publication number Publication date
CN103717520B (zh) 2016-03-23
DE102011080629A1 (de) 2013-02-14
WO2013020782A2 (fr) 2013-02-14
KR20140030305A (ko) 2014-03-11
JP2014524993A (ja) 2014-09-25
WO2013020782A3 (fr) 2013-08-22
JP5829335B2 (ja) 2015-12-09
KR101557248B1 (ko) 2015-10-02
EP2741988B1 (fr) 2015-03-11
CN103717520A (zh) 2014-04-09

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