EP1038062B1 - Procede et dispositif pour controler l'insertion de fils de trame dans un metier mecanique - Google Patents

Procede et dispositif pour controler l'insertion de fils de trame dans un metier mecanique Download PDF

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Publication number
EP1038062B1
EP1038062B1 EP98962420A EP98962420A EP1038062B1 EP 1038062 B1 EP1038062 B1 EP 1038062B1 EP 98962420 A EP98962420 A EP 98962420A EP 98962420 A EP98962420 A EP 98962420A EP 1038062 B1 EP1038062 B1 EP 1038062B1
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EP
European Patent Office
Prior art keywords
weft
time
filling
thread
scissors
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
EP98962420A
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German (de)
English (en)
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EP1038062A1 (fr
Inventor
Henry Shaw
Herman Salomez
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.)
Picanol NV
Original Assignee
Picanol NV
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 Picanol NV filed Critical Picanol NV
Publication of EP1038062A1 publication Critical patent/EP1038062A1/fr
Application granted granted Critical
Publication of EP1038062B1 publication Critical patent/EP1038062B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/70—Devices for cutting weft threads

Definitions

  • the invention relates to a method and an apparatus for Checking the insertion of weft threads in a weaving machine, in each of which a weft thread to be entered from a previously entered one, already integrated into a tissue Weft is cut.
  • a donor rapier takes a weft to be inserted into a shed, the At the beginning with the previously entered and woven Weft thread is connected and the part to be introduced by means a thread feeder or the like. is kept ready.
  • the weft thread to be inserted must be at the beginning of the insertion the shed can be cut with a weft scissors. There is a risk that the weft will not is properly picked up by the encoder gripper, or that the weft torn between the tissue and the donor gripper becomes.
  • EP 0 839 938 A1 which has not been published beforehand, discloses that that the cutter is dependent on a weft is controlled by the position of a gripper.
  • the invention has for its object a method of to create the type mentioned, in which the danger the incorrect picking up of a weft thread to be entered and / or the risk of tearing the weft on Tissue is largely avoided.
  • This object is achieved in that the time is recorded in which the weft is actually cut.
  • this object is achieved in that Means are provided for detecting the point in time at which the weft is actually cut.
  • the invention is based on the consideration that the point in time to which a weft thread is actually cut, not coincides with a time at which the shear blades take a certain position with a weft scissors. Rather, a weft thread depends on its thickness or its relative position to the cutters of the Weft thread scissors or depending on the course of movement of these cutters in different positions this cutter actually cuts.
  • the tension of the weft thread is detected. Doing so exploited that with the severing the tension of the weft drops immediately, so the time of severing can be recorded very precisely in this way.
  • the rapier weaving machine shown in a detail in FIG. 1 has an encoder gripper 1, which is by means of a gripper belt 2 is driven to a weft 3 or 4 in to introduce a shed 6 formed from warp threads 5.
  • the Donor gripper 1 brings a weft thread 3 or 4 from the entry side to about the middle of the shed 6. There takes over a not shown gripper the weft 3 or 4th and transports it to the opposite side of the shed 6.
  • the warp threads 5 are indicated by means of schematically Heald frames 7 moved up and down to form shed compartments 6.
  • a registered weft 3, 4 is on the edge of a indicated fabric 8 struck.
  • the rapier weaving machine also contains a control device 9, which receives signals from a sensor 10, which has an encoder disc 11 works together.
  • the encoder disk 11 is arranged on a shaft 12 which is synchronous with the main drive shaft the drive means for driving the gripper belt 2 is running.
  • the control device 9 is a display device 13 connected, which will be explained later will be.
  • the rapier weaving machine also contains one Weft clamp 14, a weft scissors 15 and means with which the time is recorded at which a weft 3 or 4 is actually severed. These funds included a measuring element 16, which is connected to the control device 9 is.
  • the weft scissors 15 which are shown in particular in FIGS. 2 to 4 is clearly shown, has a stationary arrangement Blade 17 on a frame, not shown the loom is attached.
  • the weft scissors also have 15 a movable shear blade 18, which in no closer shown way is drivable.
  • the two blades 17, 18 are connected to one another by means of a bolt 19.
  • the measuring element 16 consists of an elastically deformable Bracket 20 with one end by means of screws 21 on the stationary Blade 17 is attached.
  • On the elastically deformable Brackets 20 are one or more sensors 22, for example Strain gauges, arranged with the control device 9 are connected so that the control device 9th a deformation of the bracket 20 is detected.
  • the weft thread 3 is shown in a position in which it is kept ready for a donor gripper.
  • the Shear blades 17 and 18 of the weft scissors 15 are open.
  • the position of the weft thread 3 corresponds to that of the broken line in FIG. 1 represented position between the eye of a controlled Thread holder 23 and a thread guide 27, which is arranged laterally in the vicinity of the fabric 8.
  • the weft thread 3 is gripped by the gripper 1 and taken so that the weft 3 in a weft clamp 14 and inserted into the weft cutter 15 as this is shown in Fig. 1 with solid lines.
  • the elastic Bracket 20 of the measuring element 16 is arranged such that the not yet cut weft 3 - especially the Weft section 3A on the side of the fabric 8 next to the Weft thread scissors 15 - comes into contact with the bracket 20.
  • the bracket 20 is arranged such that it still by means of not cut weft 3 is deformed while the weft thread 3 is brought into the weft thread shear 15.
  • the weft 3 is in a position just before Shown clipping.
  • the elastic bracket 20 has one relatively strong deformation due to the thread tension -in which is located essentially in the region of the weft scissors 15 Weft section 3A is dependent.
  • Fig. 4 is a position immediately after the cut of the weft thread 3 shown.
  • the cut weft 3 and especially the weft section 3A do not strain more the bracket 20.
  • the other, which is no longer visible in FIG. 4 Part of the weft thread 3 is taken along by the donor gripper 1 and transported into the shed.
  • the bracket 20 is arranged that he immediately after cutting the weft 3 is relieved.
  • the bracket 20 then takes again 2 position.
  • the movable shear blade 18 returns also back to the position shown in FIG. 2.
  • Fig. 2 to 4 can be seen before cutting the weft the bracket 20 with the weft 3 under the influence of Thread tension deformed in the weft section 3A.
  • the elastic bracket 20 of the measuring element 16 in the immediate vicinity of the weft scissors 15 is arranged so that the weft 3 immediately after Cutting no longer presses on the bracket 20. In this After cutting, no other component can Hold the weft section 3A in contact with the bracket 20. The Tension in the bracket 20 of the measuring element 16 thus drops immediately away, as well as the weft 3 is cut. In order to the time of severing can be detected exactly.
  • the arrangement is of the elastic bracket 20 of the measuring element 16 between the Weft thread scissors 15 and the fabric 8 are advantageous. But when no weft clamp 14 is present, the elastic Bracket 20 of the measuring element 16 on each of the two sides of the Weft thread scissors 15 are arranged.
  • the measuring element 16 with the elastic bracket 20 is not only for detecting the time of cutting the Weft 3 is an advantage, but it also serves as a compensation device. Because of this balancer the time of severing something with rapier weaving machines less critical because it reduces the chance that the Weft 3 between the fabric 8 and the donor gripper 1 because of torn to late cutting.
  • the 5 contain the means for detecting the time at which the weft threads are cut 3 or 4 a measuring element 16 which has a holder 24, which is attached to the stationary blade 17.
  • the holder 24 is provided with a pressure sensor 25, for example a piezo-electric pressure transducer that is arranged that the not yet cut weft 3, 4 is applied to it under tension or pressure.
  • the Pressure sensor 25 is connected to the control device 9 and thus enables detection of the severing of the Weft thread about the detection of the thread tension in the weft thread section 3A. Before the weft 3 or 4 cut off the weft section 3A acts sufficiently over one long period of time on the pressure sensor 25, which is therefore the presence a thread tension.
  • the thread tension is eliminated, whereby the sensor 25 is relieved. This is the time which weft 3 or 4 is actually cut, detectable as the time at which the thread tension in the weft section 3A is omitted.
  • the interrupts Weft section 3A shows the light rays between transmitter 54 and receiver 53, so that the optical sensor 25 via a the presence of a weft thread for a sufficiently long period of time 3 or 4 notes.
  • the weft 3 or 4 is cut, take the weft section 3A and elastic bracket 20 positions as with a solid Line are shown in Fig. 6.
  • the weft section 3A is out of range by means of the elastic bracket 20 of the optical sensor 26 has been removed so that the Sensor 26 no longer detects a weft thread. Point of time, to which the weft thread 3, 4 is cut can thus can be detected as the time at which the optical sensor 26 no longer registered the weft section 3A.
  • the control device 9 is provided with means for displaying the Equipped at the time of cutting a weft thread, which this time in different ways on a display device 13 can represent.
  • the The time of the cut is represented as a time value, or as a value of an angular position of those already mentioned Wave 12 or as a value of a longitudinal position of the Encoder gripper 1 in its direction of movement. From the value for the angular position of the shaft 12 can in a simple manner Value for the length position of the encoder gripper 1 can be determined and vice versa as well.
  • the middle element 46 lights up when the time of the actual cut of the weft thread 3 or 4 with the desired time of cutting matches. A little earlier When severed, the light element 47 lights up the light-emitting element 48 illuminates at a late severing Luminous element 49 lights up when it is much too early Cut through and the light element 50 at one significantly late severing.
  • the operator can then on an input unit, for example the input unit 43 7, make an adjustment to the function of To change weft scissors 15 so that the actual Cut sooner or later.
  • the operator has control over the correct setting by it checks which of the lighting elements 46 to 50 after one Change of setting lights up.
  • Fig. 7 is an example of driving a weft scissors 15 shown.
  • the weft scissors 15 has one stationary on a frame of the weaving machine, not shown attached shear blade 28 and a movable shear blade 29, which is pivoted by means of a drive 30.
  • the Drive 30 includes a drive shaft 31 which is in synchronism with the already mentioned shaft 12 runs.
  • On the drive shaft 31 is a cam disk 32 in an adjustable angular position arranged.
  • the drive 30 also includes a shaft 33 pivotable lever 34.
  • the lever 34 is at one end with a cam rotor 35 which is connected to the cam disk 32 cooperates.
  • the lever 34 has one Fork 36 on the one with the pivotable shear blade 29th attached pin 37 cooperates.
  • the axis 33 is eccentric attached to an axis 38, which is not shown in detail Way is stored in the frame of the weaving machine.
  • adjustment means 39 are provided around the axis 38 to twist and thus to change the position of the axis 33.
  • a load spring 40 is also provided the lever 34 loaded and the cam rotor 35 against the Cam 32 presses.
  • the setting means contain 39 a servomotor 42 - in particular a stepper motor - Which is controlled by the control device 9.
  • the Control is based on values that an operator on the input unit 43 in the control device 9 enters. This makes it possible to adjust the setting means 39 to be placed in a location that is difficult for the operator can be reached.
  • the weft 3 is cut off when the cam 41 of the cam disc 32 with the Cam rotor 35 works together.
  • the time of the cut is displayed on the display device 13. If the indicated time of the cut before or after desired time of severing, i.e. for example one of the light elements 47 to 50 lights up, so the operator changes by entering values the input unit 43 the angular position of the control device 9 controlled actuator 42 and thus the position the axis 33. This happens until the weft threads cut at the desired time, i.e. each the lighting element 46 lights up.
  • the operator changes the set values so that the difference between the sensed and the desired Time of cutting the weft 3 or 4 is the same becomes zero.
  • the course of movement of the movable shear blade 29 changed. If using the setting described above it is not possible the difference between the detected Time of separation and the desired time of The zero position, the position of the cam disc 32 adjusted relative to the drive shaft 31 become.
  • the axis 38 should not turn. This can be done, for example, if the Actuator 42 is a stepper motor that is constantly with a Holding current is fed. Of course it is also possible to set the axis 38 mechanically lock against twisting.
  • the drive shaft 31 is by means of a drive motor 44 driven.
  • This drive motor 44 regardless of the angular position of the rapier weaving machine, i.e. for example regardless of the angular position the shaft 12, the course of movement of the shaving blade control based on information from the control device 9.
  • the course of movement of the shear blade 29 is of course dependent on the weaving cycle and almost synchronized with the rotation of the Shaft 12, so that the weft scissors 15 to be entered Cut weft on every weaving cycle.
  • the control device 9 automatically the drive motor Actuate 44 such that the weft scissors 15 to one cuts off earlier in the weaving cycle. If the above-mentioned point in time of the severing is in front of it, so if necessary, the control device 9 automatically controls change so that the weft scissors 15 a little later cuts off during the weaving cycle.
  • the drive motor 42 according to FIG. 7 can also be in both directions of rotation can be adjusted by means of the control device 9, so that the actual time of cutting a weft with the time set on the input unit 43 matches.
  • the axis 33 can be Setting means 39 can be set, which is a servomotor 42 included, the drive shaft 31 by a Drive motor 44 is driven.
  • the Setting means 39 which is indicated, for example, in FIG. 7 are a snail that engages a worm wheel that can be rotated together with the axis 38. It is useful when weaving with two or more different Weft threads 3 or 4 seek a compromise so that the Weft thread scissors 15 almost the same for all weft threads performs a cut at a defined point in time.
  • Detecting the time of severing a Weft thread 3 or 4 can also be used for other measures than for the setting of the weft scissors 15 may be advantageous.
  • Rapier weaving machines in which between one in Fig. 1 not shown weft feeder and the associated Thread feeders 23 or 45 one by means of the control device 9 electrically controllable thread brake 51 or 52 is present, can the braking force of this thread brake 51, 52 by means of a Signals of the control device 9 depending on the in the above-described manner detected time of the severing to be controlled.
  • the control of the Braking force of the thread brake 51, 52 at a suitable time be picked up so that the weft thread is less Tension using the gripper 1 in the shed 6 can be entered.
  • Thread brakes 51, 52 can for example consist of separately arranged thread brakes as they are made of US 5 002 098 are known. Thread brakes 51, 52 of this type can also be used in connection with thread preparation devices are provided, for example with pre-winding devices, such as this is known from US 5 343 899.
  • the associated thread feeder can 23 or 45 for example, according to US 5 400 834 by means of a controllable by the control device 9 Drive motor can be controlled.
  • the thread feeder can 23, 45 after the detected time of separation be slightly moved upwards to insert the weft redirect as little as possible during the entry, so that the weft thread under low tension by means of the donor gripper 1 further entered in the shed 6 can. This can be done by the thread feeder in question 23 or 45 immediately after detecting the Cutting the weft is moved up.
  • the detected time of a weft cut can also be used to make other elements of the loom to control depending on this detected point in time.
  • electrically controllable gripper openers can also be used according to WO 97/40218 or others electrically controllable means depending on the detected point in time of cutting can be controlled.
  • the measuring element 16 can also be used for other purposes than just to detect the time of the cut be used. If the measuring element 16 of FIGS. 1 to 5 or 7 to 8, for example, none or only when the shot is inserted measures thread tension for a short time, or if that Measuring element 16 according to FIG. 6 the presence or no time detects a weft thread, then the control device 9 this as a lack of weft or as one Interpret the weft break and interrupt the weaving process. To capture the short time mentioned above the time with one stored in the control device 9 Time span to be compared.
  • the invention is of course not only for rapier weaving machines used. It can also be beneficial to others Weaving machines are used, for example in rapier weaving machines and similar weaving machines where a weft thread - preferably at the beginning of the weft insertion is cut with a weft scissors.

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

Claims (11)

  1. Procédé pour contrôler l'insertion de fils de trame (3, 4) dans une machine à tisser, où respectivement un fil de trame à insérer (3, 4) est coupé d'un fil de trame inséré avant, déjà lié dans un tissu (8), caractérisé en ce que l'instant est détecté auquel le fil de trame (3, 4) est effectivement séparé.
  2. Procédé selon la revendication 1, caractérisé en ce que l'instant de la séparation du fil de trame (3, 4) est réglable.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que pour détecter l'instant de la séparation du fil de trame (3, 4), la tension du fil de trame est détectée.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que l'instant de la séparation du fil de trame (3, 4) est indiqué.
  5. Dispositif pour contrôler l'insertion de fils de trame (3, 4) dans une machine à tisser, qui comporte des ciseaux (15) pour couper le fil de trame à insérer d'un fil de trame inséré avant, déjà lié dans un tissu (8), caractérisé en ce que des moyens (16) sont prévus pour détecter l'instant auquel le fil de trame (3, 4) est réellement séparé.
  6. Dispositif selon la revendication 5, caractérisé en ce que des moyens (30) sont prévus pour régler dans le temps l'opération de coupe des ciseaux (15).
  7. Dispositif selon la revendication 5 ou 6, caractérisé en ce qu'au voisinage des ciseaux (15), des moyens (20, 22 ; 24, 25) sont disposés pour détecter la tension du fil de trame (3, 4) posé dans les ciseaux (15).
  8. Dispositif selon la revendication 7, caractérisé en ce que les moyens (16) pour détecter la tension du fil de trame (3, 4) comportent un élément de mesure (20) déformable élastiquement.
  9. Dispositif selon la revendication 7, caractérisé en ce que les moyens (16) pour détecter la tension du fil de trame (3, 4) comprennent un capteur de pression (25).
  10. Dispositif selon l'une des revendications 5 à 9, caractérisé en ce que les moyens (16) pour détecter l'instant de la séparation du fil de trame (3, 4) sont raccordés à une installation d'affichage (13).
  11. Dispositif selon l'une des revendications 5 à 10, caractérisé en ce que les moyens (16) pour détecter la séparation du fil de trame (3, 4) sont raccordés à une installation de commande (9) qui commande les ciseaux du fil de trame (15) et des moyens (23, 45) pour tenir à disposition un fil de trame à insérer (3, 4) et/ou des tendeurs de fil (51, 52).
EP98962420A 1997-12-11 1998-12-07 Procede et dispositif pour controler l'insertion de fils de trame dans un metier mecanique Expired - Lifetime EP1038062B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE9701007 1997-12-11
BE9701007A BE1011603A3 (nl) 1997-12-11 1997-12-11 Werkwijze en inrichting voor het controleren van een inslaginbreng bij een weefmachine.
PCT/EP1998/007942 WO1999029946A1 (fr) 1997-12-11 1998-12-07 Procede et dispositif pour controler l'insertion de fils de trame dans un metier mecanique

Publications (2)

Publication Number Publication Date
EP1038062A1 EP1038062A1 (fr) 2000-09-27
EP1038062B1 true EP1038062B1 (fr) 2003-03-12

Family

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Application Number Title Priority Date Filing Date
EP98962420A Expired - Lifetime EP1038062B1 (fr) 1997-12-11 1998-12-07 Procede et dispositif pour controler l'insertion de fils de trame dans un metier mecanique

Country Status (6)

Country Link
US (1) US6273150B1 (fr)
EP (1) EP1038062B1 (fr)
BE (1) BE1011603A3 (fr)
DE (1) DE59807501D1 (fr)
ES (1) ES2189283T3 (fr)
WO (1) WO1999029946A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008027140A1 (de) 2008-05-30 2009-12-03 Picanol N.V. Vorrichtung und Verfahren zum Schneiden eines einzutragenden Schussfadens

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2055500A (en) * 1998-12-23 2000-07-31 Eli Lilly And Company Aromatic amides
DE10224079B3 (de) * 2002-05-31 2004-03-25 Lindauer Dornier Gmbh Verfahren und Vorrichtung zum aufeinander folgenden Eintragen von Schussfäden in das Webfach einer Webmaschine
ITMI20031464A1 (it) * 2003-07-17 2005-01-18 Promatech Spa Dispositivo a comando elettrico per il taglio programmabile
BE1016287A6 (nl) * 2004-07-14 2006-07-04 Picanol Nv Gaapvormingsonderdeel voor een weefmachine en weefmachine.
BE1017485A3 (nl) * 2007-03-08 2008-10-07 Picanol Nv Aandrijfsysteem voor een weefmachine.
BE1022855B1 (nl) * 2013-10-24 2016-09-23 Nv Michel Van De Wiele Inrichting voor het afsnijden van inslaggaren gedurende het weven op een weefmachine en weefmachine voorzien van een dergelijke inrichting
CN112538685B (zh) * 2019-09-21 2024-04-16 泉州市永祺塑胶电子有限公司 一种分段式喂纱器

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
IT1163596B (it) * 1983-06-24 1987-04-08 Vamatex Spa Dispositivo di guida e di frenatura del filo di trama all'ingresso del passo in telai di tessitura senza navette
BE1000369A4 (nl) * 1987-03-09 1988-11-08 Picanol Nv Werkwijze voor het bevelen van een snijinrichting voor inslagdraden bij weefmachines en snijinrichting hiertoe aangewend.
JPH0523591Y2 (fr) * 1987-05-29 1993-06-16
BE1002841A3 (nl) * 1989-02-16 1991-06-25 Picanol N V Naamloze Vennoosch Inrichting voor het remmen van een inslagdraad in een weefmachine.
DE4000856A1 (de) * 1990-01-13 1991-07-18 Dornier Gmbh Lindauer Schussseitig angeordnete fadenschneidevorrichtung einer luftwebmaschine
EP0519970B1 (fr) * 1990-03-12 1998-09-23 Iro Ab Frein de sortie de fil
IT1269801B (it) * 1994-05-20 1997-04-15 Nuovo Pignone Spa Tagliatrama perfezionato per telaio ad aria
EP0839938B1 (fr) * 1996-10-07 2000-12-20 Sulzer Textil AG Procédé pour couper un fil de trame à insérer dans un métier à griffes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008027140A1 (de) 2008-05-30 2009-12-03 Picanol N.V. Vorrichtung und Verfahren zum Schneiden eines einzutragenden Schussfadens

Also Published As

Publication number Publication date
US6273150B1 (en) 2001-08-14
DE59807501D1 (de) 2003-04-17
BE1011603A3 (nl) 1999-11-09
EP1038062A1 (fr) 2000-09-27
ES2189283T3 (es) 2003-07-01
WO1999029946A1 (fr) 1999-06-17

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