EP1328674B1 - Dispositif de surveillance du film de trame - Google Patents

Dispositif de surveillance du film de trame Download PDF

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Publication number
EP1328674B1
EP1328674B1 EP01988795A EP01988795A EP1328674B1 EP 1328674 B1 EP1328674 B1 EP 1328674B1 EP 01988795 A EP01988795 A EP 01988795A EP 01988795 A EP01988795 A EP 01988795A EP 1328674 B1 EP1328674 B1 EP 1328674B1
Authority
EP
European Patent Office
Prior art keywords
sensor
thread
monitoring device
weft
weft thread
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
EP01988795A
Other languages
German (de)
English (en)
Other versions
EP1328674A1 (fr
Inventor
Stefano Lamprillo
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 EP1328674A1 publication Critical patent/EP1328674A1/fr
Application granted granted Critical
Publication of EP1328674B1 publication Critical patent/EP1328674B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/18—Automatic stop motions
    • D03D51/34—Weft stop motions

Definitions

  • the invention relates to a monitoring device specified in the preamble of claim 1 Art.
  • the observation interval is set on the microprocessor of the control of the weft detector. Since the point along the thread path at which the weft is released, depending on certain factors, e.g. the type of tissue, the weaving width, or the like, by which Weber can be adjusted, the observation interval must also be adjusted accordingly in order to maintain the precision of the monitoring. This is awkward.
  • arrival sensors are common, e.g. EP 0 374 398 A, which emit a signal on arrival of the weft thread on the fabric edge.
  • arrival sensors are mostly opto-electronic sensors whose sensitivity to the yarn quality must be set individually, whose function suffers from the unavoidable lint, and which may need to be repositioned when converting a weaving machine. This procedure is also awkward.
  • the invention has for its object to provide a monitoring device of the type mentioned, in which the observation interval is terminated in a structurally simple manner, regardless of the thread quality and any adjustments of the release time on the loom precisely, for example, the sensitivity setting of an automatically adjusting Weft detector to simplify.
  • an electronic sensor is any sensor that is able to determine when the thread clamp reaches its release position, such as an opto-electronic sensor, a proximity sensor, a piezoelectric sensor or the like.
  • the sensor may have a fork-shaped base body with at least one piezoceramic element in the region of a fork tine, wherein the base body is optionally placed on the stop element or inserted into this and secured in position.
  • the senor In an opening device with a control board as a stop element, the sensor should be fixed to or in the control board.
  • the sensor is a piezo sensor responsive to the collision impact, it is convenient to place the sensor near the breaker surface of the board, where the collision impact is distinct and unalterable.
  • the sensor could be completed by providing an amplifier section for signal conditioning in the main body or in the signal transmission path.
  • the signal emitted and conditioned by the sensor can thus be used directly to terminate the observation interval.
  • a yarn processing system in FIG. 1 comprises a weaving machine M, here a rapier weaving machine, at least one yarn feeding device F and a weft yarn detection device W in which, for example, a plurality of parallel weft detectors D are combined for one weft Y each.
  • the rapier M has a tray 1 and a Bringergreifer 2 and a slave gripper 3, which are driven by a drive mechanism 4.
  • a main control and monitoring device C is provided in a weaving machine control panel 5.
  • a thread selection device 6 is provided, which is controlled by the control unit C, for example.
  • the weft detector device W is z. B. connected to the control unit C, and / or with the control of the weft delivery device or a so-called stop-motion relay (not shown) for switching off the loom.
  • a gripper loom with a single gripper could be used, or a projectile weaving machine.
  • This loom types at least one entry element in common, which has a thread clamp G, which can be brought by an opening device B at the end of the tray in a thread release position and there releases the weft, so that its speed is delayed to zero.
  • Each of the weft detectors D can be designed as a thread guide element for a weft yarn Y and contain a piezoelectric sensor, not shown.
  • the weft yarn Y passes through the weft yarn detector D and excites its piezoelectric sensor by frictional forces or vibrations to which the sensor responds by generating an electrical running signal.
  • the run signal is converted into a run output as long as the weft thread is running. If the weft Y loose or torn or stops, then no more run signal is delivered.
  • a microprocessor MP may be provided which is connected, for example, to a stop switch for the loom.
  • the angle of rotation of the main shaft of the weaving machine can be set, at which the so-called SYNC signal is emitted to initiate an entry and transmitted to the control of the weft delivery device.
  • the weft detector D does not monitor the weft movement over 360 ° of the loom main shaft rotation, but only over a certain observation interval, for example, between 220 ° and 310 ° of a full 360 ° rotation.
  • the end of the observation interval should correspond to the rotational angular position at which the control unit C of the loom ceases to take into account the output signal of the weft detector D in order to generate a stop signal for the loom at an error signal from the weft detector D.
  • the observation interval should end as soon as the picking gripper 3 releases the weft yarn Y in the rapier loom M.
  • a critical phase of weft monitoring is usually the final phase of an entry.
  • the opening device B usually arranged in the region of the end of the compartment 1 for the thread clamp G of the entry member terminating the entry, eg of the rapier 3, is equipped with a sensor S which is responsive to reaching the release position or the movement of the thread clamp G in FIG the release position with a signal i responsive, which is transmitted via a transmission path 10, for example, the microprocessor MP or the controller C, which is optionally connected via a transmission path 9 to the microprocessor MP.
  • the signal i terminates the observation interval of the weft detector D. It can also be used as information for the control unit C of the loom M, in order to confirm the proper entry in conjunction with the running signal of the weft detector.
  • the sensor S Since the sensor S responds regardless of the thread quality only on reaching the release position of the thread clamp G, he does not need to be readjusted to a different thread quality in a conversion of the loom.
  • the thread clamp G In a rapier or projectile weaving machine with the opening device B, the thread clamp G by a collision impact moved two stop elements in the release position.
  • an opening device reference is made to WO97 / 40218.
  • Fig. 2 illustrates in a side view an opening device B, as it can be used in the loom M in Fig. 1.
  • a receiving slot 13 engages cooperating with a clamping surface 17 thread clamp G, which is operatively connected to a trained here as a leaf spring 14 stop element E2 so that they are at depression of the stop element E2 is lifted down from the clamping surface 17 and releases the previously held on the clamping surface 17 weft.
  • a stationary board 11 is provided for the guide body 12 to temporarily position the transport element.
  • a control board 8 Aligned to the stop element E2 is a control board 8, which constitutes another stop element E1 of the opening device B, and which is adjustable in the directions of the arrows 18 in order to be able to adapt the weft release to the desired working conditions in the compartment.
  • the control board 8 (the adjustable stop element E1) has in the embodiment shown a front oblique opening surface 15 and a lower-side horizontal ⁇ ffner consideration 16, which are intended to cooperate with the leaf spring 14 (stop element E2 on the transport element A).
  • the sensor S On the control board 16, the sensor S is mounted, which responds to the reaching of the release position of the thread clamp G and then emits its signal i.
  • the sensor S Since at the high speed of the entry element, the mutual contact between the stop elements E1, E2 generates a significant collision impact that opens the thread clamp G, the sensor S is suitably equipped with a piezo element that registers the collision impact and thus generates a signal i.
  • the arranged on the control board 16 sensor S makes any, made for example by the weaver, adjustments of the control board 16 in the directions of the arrows 18, so that it responds exactly at the time at which the thread clamp G is forced by the collision impact in the release position , the weft Y is released, and his speed drops to zero.
  • a possible embodiment of the sensor S is indicated.
  • This has a cross-sectionally L-shaped base body 21, e.g. made of a metal, with two forks 22, which define a gap 23 between them.
  • a piezo-ceramic element P, 25 is incorporated.
  • an adjustment of the sensor can be made, which can be connected via a line 19 to the respective signal receiver.
  • the senor S is also connected to a connection connector 27 via the line 19 and an amplifier 20 arranged in the line for signal conditioning.
  • the amplifier 20 could also be incorporated into the main body 21 or provided at the receiver.
  • the sensor S could be placed with its forks 22 and the gap 23 on the control board 8 (Fig. 4) and secured thereto, or it is, as shown in Fig. 4, fixed to the side of the control board 8. It would also be conceivable to provide a cutout in the control board and to place therein at least the piezo-ceramic element P, 25.
  • the piezo-ceramic element 25 is energized by the impact energy between the stopper members E1 and E2, and causes the signal i to be outputted, with which the observation interval of the weft detector D is terminated.
  • a piezo knock sensor for. B. similar to a tuning fork with piezo element, placed, which responds to the clear blow when opening the thread clamp of the entry element and the observation interval of the weft detector is finished, the weft yarn on proper running within a section of a 360 ° rotation of the Main shaft of the loom and has transmitted its monitoring result of the control device of the loom.
  • the response of the piezo-knock sensor to the impact when opening the thread clamp is sufficient to terminate the observation interval precisely and independently of the respective thread quality and of any adjustments of the point in the thread path at which the thread clamp is opened.
  • the signal of the piezo knock sensor can not provide any information as to whether the weft thread has been duly registered or not, because it represents only the release position of the thread clamp. However, this fact is irrelevant to the monitoring function of the weft detector. If it had come earlier during the entry to a weft breakage or any other disturbance that makes the completion of the entry impossible, then the weaving machine is turned off anyway, before the piezo-knock sensor would have to respond.

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

Claims (8)

  1. Dispositif de contrôle du fil de trame (Y) d'une machine à tisser (M), en particulier d'une machine à tisser à crochet ou projectile qui présente au moins un élément d'insertion (2, 3) mécanique avec une pince du fil (G) réglable dans une position de libération et avec au moins un détecteur de fil de trame (D) pour le contrôle du mouvement du fil de trame lors de l'insertion, le détecteur de fil de trame lors de chaque insertion étant activé pendant un intervalle de temps limité pour l'observation, qui se termine au moins approximativement avec la libération du fil de trame (Y) inséré par la pince du fil (G), caractérisé en ce que dans un dispositif d'ouverture (B) prévu dans le machine à tisser (M) pour la pince du fil (G) de l'élément d'insertion (3), un détecteur électronique (S) étant prévu, qui réagit à la réalisation de la position de libération de la pince du fil (G) par un signal (i) représentant la fin de l'intervalle d'observation du détecteur de fil de trame (D).
  2. Dispositif de contrôle selon la revendication 1, caractérisé en ce que la pince du fil (G) peut se déplacer dans la position de libération par un impact de collision entre des éléments de butée (E1, E2) agencés sur l'élément d'insertion (3, A) et dans le dispositif d'ouverture (B), et en ce que le détecteur (S) est un piézo-détecteur se déclenchant à l'impact de collision, de préférence avec un élément piézo-céramique (P).
  3. Dispositif de contrôle selon la revendication 1, caractérisé en ce que le détecteur (S) est agencé directement à l'élément de butée (E1) du dispositif d'ouverture (B), le dispositif d'ouverture (B) et/ou l'élément de butée (E1) étant réglable(s) par rapport à la ligne de mouvement de l'élément d'insertion (3, A) dans le machine à tisser (M).
  4. Dispositif de contrôle selon au moins l'une des revendications précédentes, caractérisé en ce que le détecteur (S) présente un corps principal (21, 22) configuré en diapason avec au moins un élément piézo-céramique (25), de préférence dans la zone d'une dent de fourche (22).
  5. Dispositif de contrôle selon la revendication 2, caractérisé en ce que l'élément de butée (E1) est configuré comme une platine de commande et en ce que le détecteur est fixé sur la platine de commande ou dans celle-ci.
  6. Dispositif de contrôle selon la revendication 5, caractérisé en ce que la platine de commande présente au moins une surface de râteau (15, 16) et en ce que le détecteur (S) est situé à proximité de la surface de râteau.
  7. Dispositif de contrôle selon au moins une des revendications précédentes, caractérisé en ce que dans le corps principal (21) du détecteur et/ou dans le trajet de transmission du signal (18) pour le signal de fin (i), un amplificateur (20) est prévu pour le conditionnement du signal.
  8. Dispositif de contrôle selon au moins une des revendications précédentes, caractérisé en ce que le détecteur (S) est raccordé au détecteur de fil de trame (D) ou, selon le cas, sa commande (MP) ou à la commande (C) du machine à tisser par un câble (19) ou sans fil.
EP01988795A 2000-10-24 2001-10-23 Dispositif de surveillance du film de trame Expired - Lifetime EP1328674B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10052703A DE10052703A1 (de) 2000-10-24 2000-10-24 Schussfaden-Überwachungsvorrichtung
DE10052703 2000-10-24
PCT/EP2001/012249 WO2002034983A1 (fr) 2000-10-24 2001-10-23 Dispositif de surveillance du film de trame

Publications (2)

Publication Number Publication Date
EP1328674A1 EP1328674A1 (fr) 2003-07-23
EP1328674B1 true EP1328674B1 (fr) 2006-05-03

Family

ID=7660891

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01988795A Expired - Lifetime EP1328674B1 (fr) 2000-10-24 2001-10-23 Dispositif de surveillance du film de trame

Country Status (8)

Country Link
US (1) US6896008B2 (fr)
EP (1) EP1328674B1 (fr)
JP (1) JP3808437B2 (fr)
KR (1) KR100523834B1 (fr)
CN (1) CN1227398C (fr)
AU (1) AU2002223641A1 (fr)
DE (2) DE10052703A1 (fr)
WO (1) WO2002034983A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10052703A1 (de) 2000-10-24 2002-05-02 Iro Patent Ag Baar Schussfaden-Überwachungsvorrichtung
KR101105570B1 (ko) * 2005-01-28 2012-01-17 한라공조주식회사 자동차 공조장치의 인테이크 도어 구동장치
JP5365418B2 (ja) * 2009-08-27 2013-12-11 株式会社豊田自動織機 ジェットルームにおける緯糸検出装置
DE102015213015B3 (de) * 2015-07-13 2016-07-07 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Webmaschine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH639152A5 (de) * 1979-05-04 1983-10-31 Loepfe Ag Geb Elektronischer schussfadenwaechter an einer webmaschine mit greiferschuetzen.
BE1001513A3 (nl) * 1988-03-16 1989-11-14 Picanol Nv Weefmachine, met een verbeterde voeding voor de inslagdraden.
DE3843683A1 (de) 1988-12-23 1990-06-28 Dornier Gmbh Lindauer Schussfadenwaechter fuer luftwebmaschinen
JPH08122640A (ja) * 1994-10-26 1996-05-17 Nikon Corp ズームレンズ
EP0904437A1 (fr) 1996-04-19 1999-03-31 Picanol N.V. Dispositif pour ouvrir une pince de rapiere d'un metier mecanique
SE9900792D0 (sv) * 1999-03-03 1999-03-03 Iro Patent Ag Method for monitoring run/stop conditions of a yarn
SE9900791D0 (sv) * 1999-03-03 1999-03-03 Iro Patent Ag Method for monitoring weft yarn run/stop conditions
DE10052703A1 (de) 2000-10-24 2002-05-02 Iro Patent Ag Baar Schussfaden-Überwachungsvorrichtung

Also Published As

Publication number Publication date
EP1328674A1 (fr) 2003-07-23
KR20030042473A (ko) 2003-05-28
DE50109712D1 (de) 2006-06-08
KR100523834B1 (ko) 2005-10-25
CN1227398C (zh) 2005-11-16
JP2004517218A (ja) 2004-06-10
CN1471596A (zh) 2004-01-28
US20040016472A1 (en) 2004-01-29
AU2002223641A1 (en) 2002-05-06
DE10052703A1 (de) 2002-05-02
WO2002034983A1 (fr) 2002-05-02
JP3808437B2 (ja) 2006-08-09
US6896008B2 (en) 2005-05-24

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