EP0572753B1 - Métier à tisser avec ensouples sectionnelles - Google Patents

Métier à tisser avec ensouples sectionnelles Download PDF

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Publication number
EP0572753B1
EP0572753B1 EP19920810592 EP92810592A EP0572753B1 EP 0572753 B1 EP0572753 B1 EP 0572753B1 EP 19920810592 EP19920810592 EP 19920810592 EP 92810592 A EP92810592 A EP 92810592A EP 0572753 B1 EP0572753 B1 EP 0572753B1
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EP
European Patent Office
Prior art keywords
warp
warp threads
loom
measuring device
threads
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
EP19920810592
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German (de)
English (en)
Other versions
EP0572753A1 (fr
Inventor
Klaus Berktold
Ernst Eberhard
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.)
Itema Switzerland Ltd
Original Assignee
Sultex AG
Maschinenfabrik Rueti 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 Sultex AG, Maschinenfabrik Rueti AG filed Critical Sultex AG
Priority to EP19920810592 priority Critical patent/EP0572753B1/fr
Priority to JP13486993A priority patent/JPH0913247A/ja
Publication of EP0572753A1 publication Critical patent/EP0572753A1/fr
Application granted granted Critical
Publication of EP0572753B1 publication Critical patent/EP0572753B1/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
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/04—Control of the tension in warp or cloth
    • D03D49/06—Warp let-off mechanisms

Definitions

  • the invention relates to a weaving machine with at least two partial warp beams and a tensioning beam for guiding warp threads running from the partial warp beams, each of the partial warp beams being coupled to an individually controllable warp let-off device and sensing elements for detecting the tension of the warp threads and a control device for individually adjusting the speed of the partial warp beams are provided.
  • the sensing elements intended for detecting the warp thread tension are arranged between a stationary rod-shaped deflecting element for the warp threads and the tensioning beam connected downstream of the part warp beams in the running direction of the warp threads in this embodiment, it is pivotably arranged on a supporting beam parallel to the axis of the partial warp beams.
  • these are driven individually at such a speed depending on control signals from the sensing elements that all the warp threads running from the sub-warp beams have essentially the same warp thread tensions.
  • Each occurring difference in the warp thread tensions in the ones running from the partial warp beams is correspondingly Warp threads are immediately compensated for by a corresponding correction of the speed of the partial warp beams.
  • the tensioning beam is mounted in bearings movable transversely to its axis, which allow the tensioning beam to be inclined with respect to the axis of the warp beam, with corresponding sensing elements associated with the ends of the tensioning beam compensating for different warp thread tensions in the warp threads running off the partial warp beams can be achieved (DE-PS 27 58 816 or US-PS 4,262,706 / T.500).
  • the invention has for its object to provide a weaving machine, in particular improved in this regard, with a warp let-off device, by means of which the production of a fabric even when using part warp beams with different winding diameters, for example when processing warp thread stocks on partly weaved part warp beams for recycling residual chains or of several fabric webs with a homogeneous product image over the entire weaving width of the weaving machine is guaranteed.
  • the measuring devices provided according to the invention which measure the length of the respective warp feed, make it possible to achieve a warp feed that is independent of the respective winding diameters of the partial warp beams and constant over the entire weaving width of the weaving machine, which enables the warp threads running from the individual partial warp beams to be woven together without the shortcomings described above, such as they can occur in previous versions with a warp let-off device regulated exclusively as a function of the warp thread tension.
  • the control of the warp let-off device permits both the production of a fabric web which is undivided over the weaving width of the weaving machine and the production of partial fabric webs whose widths correspond in the usual way to the widths of the partial warp beams, or of partial fabric webs which, by subsequently separating the undivided fabric web, also widths that are independent of the widths of the sub-warp beams can be implemented.
  • the control of the warp let-off device at the same time allows the warp thread consumption to be influenced when processing weft threads, which may have different thicknesses, for example due to different stretching or relaxation at the end of the weft insertion process, before the change of subject, ie before the warp threads are integrated.
  • warp let-off controlled exclusively as a function of the warp thread tension correspondingly different wrap threads of the warp threads or correspondingly different warp thread feeds can occur when the weft threads are of different thicknesses, which can lead to a correspondingly different weft stop density and thus to visible irregularities in the fabric.
  • Warp thread consumption controllable warp let-off device also avoids such shortcomings of previous designs.
  • the warp beams 1 and 2 are each stored in a side bearing (not shown) connected to the cheek part 3 or 4 and in a corresponding central bearing arranged on a central support part 5 and each via a gear 6 with a separately controllable drive motor 7 or 8 connected.
  • the Sub-warp beams 1 and 2 are wound with warp threads 10, which are processed as sub-chains 11 and 12 according to the arrows 13 from the sub-warp beams 1 and 2 each to a warp beam tube 9, from which they run in a path 10 'shown in dashed lines.
  • the warp threads 10 are guided against the goods tree via a rod-shaped deflection element 14 which is arranged in a stationary manner on the machine frame and a tensioning beam 15 arranged downstream thereof in the warp running direction (arrows 13) and via further parts of the weaving machine, not shown, such as heald frames, weaving reeds, etc.
  • the deflecting element 14 and the tensioning beam 15 extend over the entire weaving width B of the weaving machine, which is given by the respective, adjustable distance between the two outer warp beam discs 16 of the sub-warp beams 1 and 2.
  • the tensioning boom 15 is fastened via support parts 17 to a supporting boom 18 which, as is known, for example, from EP-PS 0109472 (T 613), is rotatably mounted on the machine frame and can be clamped counterclockwise in FIG. 2 via a torsion spring bar (not shown).
  • the tensioning boom 15, which can be pivoted about the axis of the supporting boom 18, is resiliently braced against the warp threads 10, the tension of the partial chains 11 and 12 being absorbed by the twisted spring bar.
  • two sensing elements 21 and 22, each associated with one of the partial chains 11 and 12, of a device (not shown further) for detecting the tension of the warp threads 10 are fastened via resilient holders 20.
  • an additional sensor 26 can be provided at one end of the supporting tree 18, for detecting a supporting force determined from the sum of the chain tension forces of the partial chains 11 and 12, from which a signal line 27 a control signal corresponding to this supporting force can be transmitted to the control device 25.
  • each of the partial warp beams 1 and 2 is also assigned a measuring device 31 or 32, which is designed to measure the length of a length section of the warp threads 10 that runs from the relevant partial warp beam 1 or 2 during a warp thread feed.
  • the measuring devices 31 and 32 are each connected to a signal line 33 or 34, via which a control signal corresponding to the length section of the partial chain 11 or 12 running from the partial warp beam 1 or 2 can be transmitted to the control device 25.
  • the control device 25 is connected via control lines 35 and 36 to the drive motors 6 and 7, respectively, via which the warp let-off speed of the sub-warp beams 1 and 2, depending on a predetermined combination of the control signals obtained from the sensing elements 21 and 22 and the sensor 26 and from of the control devices 31 and 32 received control signals is set.
  • the measuring devices 31 and 32 can each contain a measuring roller 37 which is rotatably mounted on a holder 38 which can be moved against the circumference of the partial warp beam 1 or 2 and away therefrom.
  • the brackets 38 can each be pivotably articulated on a stationary support part, as shown in a bracket 40 attached to the deflection element 14, between the position shown in full lines and a position 38 'shown in dashed lines and under the action of a spring 41 against the circumference of the part warp beam 1 or 2 can be held clamped.
  • the measuring roller 37 following the decreasing winding diameter, is constantly pressed against the circumference of the wound partial warp beam 1 or 2 and is set in rotation by this by an angle corresponding to the respective warp thread feed.
  • a sensor 42 assigned to the measuring roller 37 a control signal corresponding to the respective angle of rotation can be transmitted to the control device 25 via the signal line 33 or 34.
  • Corresponding measuring devices 31 and 32 can also be arranged at a distance from the partial warp beams 1 and 2, according to FIG. 3 in the region of the section 10a of the warp threads 10 running between the deflection element 14 and the tensioning beam 15.
  • the measuring rollers 37 can each be mounted on a holder 43 which is accessible from the warp side of the weaving machine and which is held on a stationary support part 44, for example under the action of a spring element 45 shown as a compression spring, against the warp threads 10 which run via a support roller 46 .
  • the support rollers 46 can each be mounted on a bracket 47 attached to the deflection element 14.
  • another guide element e.g. B.
  • this embodiment has the additional advantage that the length of the length section of the warp threads 10 corresponding to the respective warp thread feed in a defined area of the deflected on the deflection element 14 Warp thread course is detected in which all the warp threads 10 have essentially the same warp thread tension that is independent of the respective winding state of the partial warp beam 1 or 2. Accordingly, it can be ensured that the warp thread feed detected in the measuring range matches the actual feed of the entire part chain 11 or 12.
  • the measuring rollers 37 can also each be arranged on a rod-like holder 48, which is guided in a stationary guide part 50, essentially radially to the axis of the partial warp beam 1 or 2, and between the position shown in full lines and one Position 48 'shown in dashed lines is held displaceably.
  • the measuring roller 37 can be pressed against the circumference of the wound partial warp beam 1 or 2 under the effect of the dead weight of the holder 48 or under the effect of a spring (not shown).
  • the warp threads 10 of the partial warp beam 1 or 2 can also be guided directly against the tensioning beam 15, which in the illustrated embodiment can be supported in spring-mounted, lateral bearings, each of which, in a manner known per se, not shown
  • Both ends of the spanning tree 15 can be assigned a sensor intended to detect the supporting force, for example corresponding to the sensor 26 in FIG. 1, by means of which a control signal corresponding to the respective supporting force and thus the respective distribution of the warp tension forces can be transmitted to the control device 25.
  • spanning tree is mounted in bearings which are provided with corresponding sensors and are arranged in a fixed position.
  • sub-spanning trees subdivided can also be provided analogously to the assigned part warp beams 1 and 2.
  • the drive motors 7 and 8 can be controlled in accordance with the control signals of the sensors 21, 22 and 26 which detect the tension of the warp threads 10 and the measuring devices 31 and 32 which detect the running length of the warp threads 10 in such a way that those of the partial warp beams 1 and 2 running partial chains 11 and 12 each have the same running speed.
  • the control lines 33 and 34 of the measuring devices 31 and 32 can be connected to the control device 25, for example via a control unit 30 indicated in FIG.
  • the proportions of these control signals can each be adjustable between 0 and 100%.
  • the length of the respective warp thread feed can be dispensed with and the warp let-off devices can be controlled exclusively as a function of the sensors 21, 22 and 26 that detect the tension of the warp threads 10.
  • the detection of the warp thread tensions can be dispensed with or the processing of the corresponding control signals can be dispensed with, so that the drive motors 7 and 8 exclusively as a function of the control signals of the measuring devices 31 and 32 can be controlled.
  • any combination of the proportions of these control signals can be set via the control device 25 or the control unit 30 and used for the control of the warp let-off devices.
  • the most advantageous weighting for warp thread tension and warp thread consumption is preselected, e.g. for the processing of warp threads 10 of low elasticity, a correspondingly predominant proportion of the signals detecting the warp thread consumption, and for the processing of warp threads 10 of higher elasticity, a corresponding predominant proportion of the control signals detecting the warp thread tension can be taken into account.
  • corresponding measuring devices 51 intended for direct measurement of the warp thread feed can also be provided, each of which contains two sensors 52 and 53 located one behind the other at a distance A in the running direction (arrow 13) of the warp threads each respond to the structure of the continuous warp thread 10 or a group of the continuous warp threads 10 and thus generate two signals which are determined by the thread structure and are similar to one another.
  • 6 is in the diagram the time course of two corresponding control signals C52 and C53 shown, which follow one another in a time period corresponding to the warp thread feed T and which are transmitted via signal lines 34a and 34b to the control device 25 and can be compared, for example by correlation methods.
  • Capacitive, optical or piezo elements can be used as sensors.
  • UV sensors can be provided, each of which responds to markings made on the relevant warp thread 10 or on a warp thread group, for example in the form of a color print.
  • the length measuring devices 31, 32, 51 and the corresponding control unit 30 provided according to the invention can also each be attached to an existing weaving machine and connected to the existing control device for the warp let-down which can be influenced as a function of the warp thread tension.
  • the design of the weaving machine according to the invention is also possible for designs with partial warp beams arranged parallel to one another and / or with more than two, e.g. three or four, partial warp beams applicable, each of which can be assigned one of the length measuring devices described above.

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

Claims (7)

  1. Métier à tisser comprenant au moins deux ensouples sectionnelles (1, 2) et une ensouple de tension (15) destinée à guider la chaîne (10) se déroulant des ensouples sectionnelles (1, 2), chacune des ensouples sectionnelles (1, 2) étant couplée à un dérouleur de chaîne qui peut être commandé séparément, et des capteurs tactiles (21, 22, 26) destinés à mesurer la tension de la chaîne (10) ainsi qu'un appareil de commande (25) destiné au réglage individuel de la vitesse de rotation des ensouples sectionnelles (1, 2) étant prévus, ce métier à tisser étant caractérisé en ce qu'un système (31, 32; 51) conçu pour mesurer la longueur d'un segment d'au moins une partie de la chaîne (10) se déroulant de l'ensouple sectionnelle (1, 2) concernée quand il longe ce système de mesure (31, 32; 51) lors de l'avance d'une chaîne, est affecté à chacune des ensouples sectionnelles (1, 2) et qu'un signal de commande correspondant au segment concerné peut être transmis par ce système de mesure (31, 32, 51) à un appareil de commande (25) capable de moduler la vitesse de rotation de l'ensouple sectionnelle (1 ou 2) en fonction de ce signal de commande afin de maintenir constante une longueur prédéfinie de ce segment.
  2. Métier à tisser selon la revendication 1, caractérisé en ce que le système de mesure (31, 32) est fixé à un manche (38) qui peut être amené sur la circonférence de l'ensouple sectionnelle (1, 2) enveloppée par la chaîne (10) et en être éloigné.
  3. Métier à tisser selon la revendication 1, caractérisé en ce que le système de mesure (31, 32, 51) est disposé à proximité d'un segment (10a) de la chaîne (10) se déroulant de l'ensouple sectionnelle (1, 2) quand il se trouve à distance de celle-ci.
  4. Métier à tisser selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de mesure (31, 32) contient une bobine de mesure (37) qui peut être pressée contre plusieurs fils de la chaîne (10) et entraînée par rotation sur celle-ci et qui est reliée à l'appareil de commande (25) par un capteur (42) destiné à mesurer la vitesse de rotation que lui imprime l'avance de la chaîne à un moment donné.
  5. Métier à tisser selon la revendication 3 ou 4, caractérisé en ce que le système de mesure (31, 32) est disposé à proximité d'un élément de guidage (46) fixe destiné à au moins une partie de la chaîne (10).
  6. Métier à tisser selon la revendication 1 ou 3, caractérisé en ce que le système de mesure (51) contient deux capteurs (52, 53) disposés en tandem dans le sens de rota-tion (13) de la chaîne (10) et espacés d'un écart prédéfini (A) qui permettent de transmettre à l'appareil de commande (25) deux signaux de commande (C₅₂, C₅₃) semblables, décalés l'un par rapport à l'autre d'un laps de temps (T) correspondant à la vitesse de déroulement de la chaîne et conditionnés chacun par la structure d'au moins l'un des fils de la chaîne (10).
  7. Métier à tisser selon l'une quelconque des revendications précédentes, comprenant des capteurs tactiles (21, 22, 26) permettant chacun de transmettre à l'appareil de commande (25) un signal de commande correspondant à la tension de la chaîne à un moment donné, caractérisé en ce que l'appareil de commande (25) contient un organe de commande (30) par lequel les signaux de commande correspondant à la tension de chaîne mesurée à un moment donné et les signaux de commande correspondant au segment de chaîne (10) mesuré à un moment donné peuvent être transmis à un dérouleur de chaîne dans un rapport prédéfini, les taux de ces signaux de commande pouvant être réglés entre 0 et 100 %.
EP19920810592 1992-06-05 1992-08-03 Métier à tisser avec ensouples sectionnelles Expired - Lifetime EP0572753B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19920810592 EP0572753B1 (fr) 1992-06-05 1992-08-03 Métier à tisser avec ensouples sectionnelles
JP13486993A JPH0913247A (ja) 1992-06-05 1993-06-04 複数のワープビームを備えた織機

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP92810434 1992-06-05
EP92810434 1992-06-05
EP19920810592 EP0572753B1 (fr) 1992-06-05 1992-08-03 Métier à tisser avec ensouples sectionnelles

Publications (2)

Publication Number Publication Date
EP0572753A1 EP0572753A1 (fr) 1993-12-08
EP0572753B1 true EP0572753B1 (fr) 1996-04-24

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EP19920810592 Expired - Lifetime EP0572753B1 (fr) 1992-06-05 1992-08-03 Métier à tisser avec ensouples sectionnelles

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103924362A (zh) * 2014-04-18 2014-07-16 东嘉麻棉(常州)有限公司 双轴织造送经装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3159830B2 (ja) * 1993-05-11 2001-04-23 津田駒工業株式会社 ツインビーム織機における経糸送出制御装置
SE510138C2 (sv) * 1998-02-05 1999-04-19 Texo Ab Varptrådsåtgång sparande och/eller anpassande anordning vid vävmaskin

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6052656A (ja) * 1983-08-31 1985-03-25 日産テクシス株式会社 織機の経糸送出し装置
EP0136389B1 (fr) * 1983-10-03 1986-11-12 Maschinenfabrik Sulzer-Rüti Ag Mécanisme de contrôle du déroulement de fils de chaîne pour métier à tisser
US4662407A (en) * 1986-02-12 1987-05-05 Albany International Corp. Method and apparatus of controlling warp tension on a weaving loom

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103924362A (zh) * 2014-04-18 2014-07-16 东嘉麻棉(常州)有限公司 双轴织造送经装置
CN103924362B (zh) * 2014-04-18 2015-07-15 东嘉麻棉(常州)有限公司 双轴织造送经装置

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EP0572753A1 (fr) 1993-12-08

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