EP0534403B1 - Dispositif électro-mécanique pour contrÔler la formation des boucles dans un métier à tricoter - Google Patents

Dispositif électro-mécanique pour contrÔler la formation des boucles dans un métier à tricoter Download PDF

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Publication number
EP0534403B1
EP0534403B1 EP92116281A EP92116281A EP0534403B1 EP 0534403 B1 EP0534403 B1 EP 0534403B1 EP 92116281 A EP92116281 A EP 92116281A EP 92116281 A EP92116281 A EP 92116281A EP 0534403 B1 EP0534403 B1 EP 0534403B1
Authority
EP
European Patent Office
Prior art keywords
movements
lever
cam
terry
members
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
EP92116281A
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German (de)
English (en)
Other versions
EP0534403A1 (fr
Inventor
Francesco Ruggeri
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.)
Promatech SpA
Original Assignee
SOMET Societa Meccanica Tessile SpA
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Application filed by SOMET Societa Meccanica Tessile SpA filed Critical SOMET Societa Meccanica Tessile SpA
Publication of EP0534403A1 publication Critical patent/EP0534403A1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D39/00—Pile-fabric looms
    • D03D39/22—Terry looms
    • D03D39/223—Cloth control

Definitions

  • the present invention concerns a device to control the movements allowing to form the loop in terry looms, wherein said loop is formed thanks to rotary oscillations of the take-up roller or to alternate displacements of the cloth deviating bar (also known as "cloth shackler"), in coordination with alternate translatory movements of the warp beam.
  • the present invention concerns an electromechanical device apt to control in such looms - with possibility of wide and easy adjustments - the rotary oscillating movements of the take-up roller or the alternate displacements of the cloth shackler, and the coordinate alternate translatory movements of the warp beam, which form the terry loop.
  • the arrangements known so far to accomplish the above requirements generally comprise devices having an inlet shaft, caused to continuously rotate by the general movement of the loom, and an outlet lever which cyclically imparts, through suitable leverages, said rotary oscillating movements to said roller or said alternate displacements to said cloth shackler, and said alternate translatory movements to said beam, such movements overlapping the ordinary movements of said roller and beam - are by no means satisfactory.
  • These devices in fact - apart from having internal mechanisms complicated and scarcely functional - require very difficult and lengthy interventions of the operator, which are no longer compatible with the present industrial requirements. Furthermore, they considerably limit the maximum allowable speed of the mechanical parts of the loom.
  • the present invention proposes instead a single control device apt to perfectly satisfy the above requirements.
  • the object of the invention is in fact reached through an electromechanical device, of the general type above described, apt to control, with possibility of wide and easy adjustments, the rotary oscillating movements of the take-up roller or the alternate displacements of the cloth shackler, and the coordinate alternate translatory movements of the warp beam, allowing to form the loops in terry looms, characterized in that, the motion from said inlet shaft to said outlet lever is transmitted through first mechanical members allowing to determine the law of said cyclic movements, and through second mechanical members allowing to select the amplitude of said movements between at least two set values - one of them being adjustable - and a nought value, said second members being controlled by electromagnetic means.
  • said first mechanical members comprise a cam with two conjugate tracks - or a single track with return spring on the respective cam follower - caused to rotate by said inlet shaft, and a rocking lever having cam followers which engage with the tracks of said cam and comprising a control bracket which projects towards said second members.
  • Said cam can be promptly replaced, by easy manual operations, so as to vary the law by which said cyclic movements follow one another.
  • said second mechanical members comprise a pair of pawls each having a first end which is pivoted to the free end of a lever and a second end which is hook-shaped, said lever operating said outer lever through a shaft to which it is fixedly connected and each of said pawls being controlled so as to engage, with its hook-shaped end, a corresponding pin of said control bracket of the rocking lever.
  • One of the pins of said control bracket is fixed, while the other pin is manually adjustable along a suitable slot.
  • Said pawls are each controlled, so as to engage said pins, by a rocking leverage operated by electromagnets, said electromagnets being electronically controlled according to the working programme of the loom on which the device is mounted.
  • control device for use in terry cloth looms, wherein the loop is formed thanks to rotary oscillating movements of the take-up roller or to alternate displacements of the cloth shackler, in coordination with alternate translatory movements of the warp beam, said movements overlapping - as supplementary cyclic movements - the ordinary movements imparted to said roller and beam in the conventional weaving operation.
  • the loop is formed thanks to rotary oscillating movements of the take-up roller or to alternate displacements of the cloth shackler, in coordination with alternate translatory movements of the warp beam, said movements overlapping - as supplementary cyclic movements - the ordinary movements imparted to said roller and beam in the conventional weaving operation.
  • the control device - the inlet shaft A of which (fig. 2) is caused to continuously rotate by a pulley B, moved by the general movement of the loom through a belt C - imparts at cyclic intervals the required supplementary movements to said roller or cloth shackler and to said beam, through an outlet lever D (the length of which is adjustable by acting on the junction E between two elements thereof) connected in known manner, through conventional leverages, to said roller and beam.
  • the control device housed into a sealed lubricated case 1, comprises (fig. 1) first mechanical members 2, to determine the law by which said supplementary cyclic movements follow one another, and second mechanical members 3, to select the amplitude of said movements.
  • Such members can be operated - partly by an electric and/or electronic control and partly by simple manual adjustments - to perform operations of selection and/or adjustment, allowing to vary the frequency and, respectively, the height of the loop being formed on the terry cloth, and also - if required - to stop loop formation (thus leading to the formation of ordinary fabric).
  • the mechanical members 2 comprise a cam 4 with two conjugate tracks 5 (or conjugate cam) and a rocking lever 6 cooperating with said cam 4.
  • the cam 4 is keyed onto a shaft 7 and can be very easily and promptly replaced by cams of different shape or type (for instance, single-track cams with return spring on the respective cam follower), by simply removing the cover 8 of the case 1 (fig. 2) which carries one of the two bearings 9 for the shaft 7.
  • the rocking lever 6 (fig. 1) is pivoted to the case 1 in 6a and carries two cam followers 12 engaging with the tracks 5 of the cam 4.
  • Said rocking lever 6 extends moreover into a long control bracket 13, from which project a fixed end pin 14 and a more rearward pin 15 the position of which is adjustable along a slot 16 of said bracket 13.
  • the mechanical members 3 in turn comprise a pair of pawls 17 and 18, both pivoted at one end into a pin 19, onto which is also pivoted the end of a lever 20 keyed onto an outlet shaft 21 of the device; onto said shaft 21 there is also keyed - externally to the case 1 (fig. 2) - the outlet lever D.
  • the pawls 17 and 18 are controlled so as to engage - when oscillating in 19 - with their free hook-shaped end, the pin 14 and, respectively, the pin 15 of the bracket 13 of the rocking lever 6. Said engagement is controlled by rocking leverages 22, 23, one for each pawl, each leverage being operated by a corresponding electromagnet 24 mounted externally to the case 1.
  • the magnets 24 can be operated either manually, by the operator, or automatically, by electronic control means, according to the working programme of the loom on which the device according to the invention is mounted.
  • the device according to the invention is preset by choosing a particular type of cam 4, and adjusting the position of the pin 15 and the length of the outlet lever D.
  • Said device works as follows: when the loom is working, the cam 4 rotates and causes the oscillation of the rocking lever 6 with a law apt to form the chosen type of terry cloth (3/1 loop, or 4/1 loop); when the pawls 17 and 18 are disengaged from the pins 14 and 15, they transmit no motion to the shaft 21 and the outlet lever D of the device remains therefore at rest. This means that no supplementary movement overlaps the ordinary movements of the take-up roller and of the warp beam: the loom hence weaves ordinary fabric and not terry cloth.
  • the device according to the invention allows to vary the height of the loop - between the two considered values - also with the loom and device in working conditions - and thus on the actual cloth being woven - by simply changing the electromagnet to be operated; as seen, this can also be done automatically.
  • the device according to the invention - very simple and compact from the structural point of view, free from slacks and requiring no maintenance - perfectly answers the requirements pointed out in the introductory part of the description: it in fact allows to rapidly and easily vary - even during weaving (by suitably operating the electromagnets 24 and, possibly, by manually adjusting the position of the pin 15) - both the type of terry loop being formed in the cloth (typically, changing over from a terry cloth with 3/1 loop to a terry cloth with 4/1 loop, and viceversa, by simply replacing the cam 4), and the height of the terry loop along the length of the cloth itself.
  • This kinematic system allows to realize a compact assembly of the control and selection members, free from slacks and fully housed into a sealed lubricated case.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Claims (8)

  1. Dispositif électromécanique pour commander, avec possibilité de réglages amples et aisés, les mouvements oscillatoires rotatifs du rouleau de prélèvement ou les déplacements en va-et-vient de l'étrier de déviation de tissu, et les mouvements de translation en va-et-vient coordonnés de l'ensouple de la chaîne, permettant de former la boucle dans les métiers à tisser des tissus à boucles - ledit dispositif étant du type comprenant un arbre d'entrée (A), amené à tourner en continu par le mouvement général du métier, et un levier de sortie (D) qui impose de manière cyclique, via des leviers, lesdits mouvements oscillatoires rotatifs audit rouleau ou lesdits déplacements en va-et-vient audit étrier de déviation de tissu, et lesdits mouvements de translation en va-et-vient à ladite ensouple, ces mouvements recouvrant les mouvements ordinaires dudit rouleau et de ladite ensouple - caractérisé en ce que, le mouvement dudit arbre d'entrée (A) audit levier de sortie (D) est transmis via des premiers organes mécaniques (2) permettant de déterminer la loi desdits mouvements cycliques, et via des seconds organes mécaniques (3) permettant de sélectionner l'amplitude desdits mouvements entre au moins deux valeurs prédéfinies - l'une d'elles étant ajustable - et une valeur zéro, lesdits seconds organes (3) étant commandés par des moyens électromécaniques (24).
  2. Dispositif selon la revendication 1, dans lequel lesdits premiers organes mécaniques (2) comprennent une came (4) avec deux pistes conjuguées (5), amenée à tourner par ledit arbre d'entrée (A), et un levier oscillant (6) comportant des suiveurs de came (12) qui s'engagent avec les pistes (5) de ladite came (4), et comprenant une console de commande (13) qui se projette vers lesdits seconds organes (3).
  3. Dispositif selon la revendication 2, dans lequel ladite came (4) comporte une seule piste avec un ressort de rappel sur le suiveur de came respectif.
  4. Dispositif selon la revendication 2 ou la revendication 3, dans lequel ladite came (4) peut être remplacée rapidement, par des opérations manuelles, pour modifier la loi des mouvements cycliques.
  5. Dispositif selon la revendication 2 ou la revendication 3, dans lequel lesdits seconds organes mécaniques (3) comprennent une paire de cliquets (17, 18) comportant chacun une première extrémité qui pivote (en 19) sur l'extrémité libre d'un levier (20) et une seconde extrémité en forme de crochet, ledit levier (20) actionnant ledit levier de sortie (D) via un arbre (21) auquel il est fixement relié et chacun desdits de cliquets (17, 18) étant commandé de manière à engager, avec son extrémité en forme de crochet, une tige correspondante (14, 15) de ladite console de commande (13) du levier oscillant (6).
  6. Dispositif selon la revendication 5, dans lequel l'une (14) desdites tiges de la console de commande (13) est fixe, tandis que l'autre tige (15) est réglable manuellement le long d'une fente appropriée (16).
  7. Dispositif selon la revendication 5, dans lequel lesdits cliquets (17, 18) sont commandés chacun, de manière à engager lesdites tiges (14, 15), par une articulation oscillante (22, 23) actionnée par des électro-aimants (24).
  8. Dispositif selon la revendication 7, dans lequel lesdits électro-aimants (24) sont commandés électroniquement selon le programme de fonctionnement du métier sur lequel le dispositif est monté.
EP92116281A 1991-09-23 1992-09-23 Dispositif électro-mécanique pour contrÔler la formation des boucles dans un métier à tricoter Expired - Lifetime EP0534403B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI912524A IT1251848B (it) 1991-09-23 1991-09-23 Dispositivo elettromeccanico per comandare i movimenti di formazione del riccio in telai di tessitura di tessuti a spugna
ITMI912524 1991-09-23

Publications (2)

Publication Number Publication Date
EP0534403A1 EP0534403A1 (fr) 1993-03-31
EP0534403B1 true EP0534403B1 (fr) 1997-08-27

Family

ID=11360739

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Application Number Title Priority Date Filing Date
EP92116281A Expired - Lifetime EP0534403B1 (fr) 1991-09-23 1992-09-23 Dispositif électro-mécanique pour contrÔler la formation des boucles dans un métier à tricoter

Country Status (4)

Country Link
EP (1) EP0534403B1 (fr)
DE (1) DE69221800T2 (fr)
ES (1) ES2106113T3 (fr)
IT (1) IT1251848B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19537277C1 (de) * 1995-10-06 1996-08-08 Dornier Gmbh Lindauer Frottierwebmaschine mit einer Florhöhenverstelleinrichtung
IT1317119B1 (it) * 2000-03-07 2003-05-27 Vamatex Nuova Spa Dispositivo di comando e regolazione per la formazione dei ricci intelai di tessitura di tipo a spugna
EP1304406A1 (fr) * 2001-10-19 2003-04-23 Promatech S.p.A. Dispositif et méthode de commande du mouvement de formation des boucles dans un métier à trames multiples pour tissu éponge

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2063933A (en) * 1979-11-26 1981-06-10 Nuovo Pignone Spa Terry motions

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1244737B (it) * 1991-02-13 1994-08-08 Nuovopignone Ind Meccanicche E Dispositivo perfezionato per la selezione della movimentazione del bilanciere del meccanismo di azionamento del pettine di un telaio tessile per spugna

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2063933A (en) * 1979-11-26 1981-06-10 Nuovo Pignone Spa Terry motions

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
EP-A- 0 499 305 *
GB-A- 2 063 933 *

Also Published As

Publication number Publication date
ITMI912524A1 (it) 1993-03-23
IT1251848B (it) 1995-05-26
DE69221800D1 (de) 1997-10-02
DE69221800T2 (de) 1998-01-02
EP0534403A1 (fr) 1993-03-31
ITMI912524A0 (it) 1991-09-23
ES2106113T3 (es) 1997-11-01

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