EP0957193B1 - Jeu de cames pour la commande des platines d'abaissement dans des métiers à tricoter circulaires pour la formation de tricot bouclette standard et tricot bouclette sandwich - Google Patents

Jeu de cames pour la commande des platines d'abaissement dans des métiers à tricoter circulaires pour la formation de tricot bouclette standard et tricot bouclette sandwich Download PDF

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Publication number
EP0957193B1
EP0957193B1 EP98108804A EP98108804A EP0957193B1 EP 0957193 B1 EP0957193 B1 EP 0957193B1 EP 98108804 A EP98108804 A EP 98108804A EP 98108804 A EP98108804 A EP 98108804A EP 0957193 B1 EP0957193 B1 EP 0957193B1
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EP
European Patent Office
Prior art keywords
sinkers
needle cylinder
cam
movable cam
knitting
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
EP98108804A
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German (de)
English (en)
Other versions
EP0957193A1 (fr
Inventor
Francesco Lonati
Ettore Lonati
Fausto Lonati
Tiberio Lonati
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.)
Santoni SpA
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Santoni SpA
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Filing date
Publication date
Application filed by Santoni SpA filed Critical Santoni SpA
Priority to DE69813507T priority Critical patent/DE69813507T2/de
Priority to ES98108804T priority patent/ES2193438T3/es
Priority to EP98108804A priority patent/EP0957193B1/fr
Publication of EP0957193A1 publication Critical patent/EP0957193A1/fr
Application granted granted Critical
Publication of EP0957193B1 publication Critical patent/EP0957193B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/32—Cam systems or assemblies for operating knitting instruments
    • D04B15/34—Cam systems or assemblies for operating knitting instruments for dials
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/06—Sinkers
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/12—Circular knitting machines with independently-movable needles with provision for incorporating pile threads

Definitions

  • the present invention relates to a lowering sinker actuation cam set for circular knitting machines for stocking or hosiery-making particularly for forming standard-terry knitting and sandwich-terry knitting.
  • the two yarns are dispensed with a particular arrangement of the corresponding yarn guides and the lowering sinkers are actuated so that during the descent of the needles the two yarns are arranged respectively on the lower lowering plane and on the upper lowering plane of the sinkers, forming, for each needle, two loops of different length in which the longer loop provides the characteristic terry effect.
  • pairs of lowering sinkers or two side-by-side sinkers are also used which are accommodated in a same radial slot of the sinker ring, each being provided with a lowering plane which is located at a different vertical level than the lowering plane of the other sinker of the same pair.
  • a pair of these sinkers corresponds to a sinker with two lowering planes located at two mutually different elevations.
  • the longer loops which produce the terry effect protrude on the back of the item, whilst the shorter loops are more visible on the right side.
  • the shorter loops are generally formed by using a very thin yarn, usually made of helanca or other similar material, whilst the longer loops, i.e., the loops of terry, are formed with a cotton yarn.
  • standard terry when patterns are formed on the item said patterns have a poor definition, owing to the fact that the shorter loops of standard terry are visible on the right side of the item between the loops of the pattern.
  • terry-stitch knitting which is known as "sandwich terry"; in this terry, during the forming of the double loops, the yarn that forms the shorter loops is shifted and kept toward the back of the item, so as to interfere as little as possible with the loops of the pattern and thus allow to achieve better definition of the pattern on the right side of the item.
  • This effect is achieved mainly by virtue of a particular actuation of the lowering sinkers in order to achieve, after resting the yarn on the lower lowering plane, a movement of the sinkers, or of the sinkers that have said lower lowering plane, away from the axis of the needle cylinder which correspondingly moves the yarn of the shorter loops toward the open side of the tip of the needles, i.e., on the back of the item, differently from ordinary terry knitting, in which the yarn of the shorter loops is shifted in the opposite direction.
  • the movement of the sinkers away from the axis of the needle cylinder is achieved by virtue of a suitable configuration of the path which is traced by the cams and countercams and in which the heels of the lowering sinkers engage and by using special sinkers.
  • sinkers are also used instead of the sinkers used for standard terry knitting.
  • the aim of the present invention is to provide a set of cams for actuating the lowering sinkers for circular knitting or hosiery-making machines which allows to perform both standard-terry knitting and sandwich-terry knitting without requiring any replacement of machine parts.
  • an object of the invention is to provide a cam set which allows to produce items which are composed partly of standard-terry stitches and partly of sandwich-terry stitches.
  • Another object of the invention is to provide a set of cams for actuating lowering sinkers which can be installed without any problem in currently commercially available circular knitting or hosiery-making machines.
  • a set of cams for actuating the lowering sinkers for circular knitting machines, for producing standard-terry stitches and sandwich-terry stitches comprising cams and countercams which form a path for the heels of the lowering sinkers which have two lowering planes arranged at mutually different elevations for at least two yarns which are dispensed at a feed of the machine to form loops of terry knitting, characterized in that it comprises, in the region of said path that corresponds to the descent of the needles of the needle cylinder to form loops of knitting with the two yarns dispensed at a feed of the machine, a cam which can move on command into two operating positions in order to produce at least one variation of the path followed by the heels of the sinkers due to said cams and countercams; said movable cam having a first profile which can be engaged by the heels of the sinkers and is suitable to produce, when said movable cam is in a first one of said two positions, a
  • the cam set according to the invention comprises cams and countercams which form, as a whole, a path 1 for the heels 2a, 3a, 4a of the lowering sinkers, generally designated by the reference numerals 2, 3, 4, which are accommodated in a per se known manner within radial slots formed in the sinker ring 5, which is arranged coaxially around the needle cylinder 6 proximate to the upper end thereof.
  • sinker pairs i.e., two sinkers which are arranged within the same radial slot of the sinker ring 5.
  • each radial slot of the sinker ring 5 there are either a sinker 2 and a sinker 3 or a sinker 2 and a sinker 4.
  • the slots of half of the sinker ring 5 accommodate sinker pairs composed of sinkers 2 and sinkers 3, whilst the slots of the other half of the sinker ring 5 accommodate sinker pairs composed of a sinker 2 and a sinker 4.
  • the sinker 2 or stitch sinker, has a lowering plane 7, whilst the sinkers 3 and 4, or terry sinkers, have lowering planes 8 and 9 which are located at a higher level than the lowering plane 7 of the sinker 2.
  • the lowering planes 8 and 9 of the sinkers 3 and 4 form longer loops, i.e., the characteristic terry stitches, during the descent of the needles 10 arranged in the needle cylinder 6.
  • the lowering plane 7 is formed between a pair of beaks 11 and 12 of the sinker 2, in a per se known manner.
  • the set of sinker actuation cams comprises, in a per se known manner, a fixed annular cam 20 which runs around the axis 6a of the needle cylinder and has an outer profile 20a provided, in a per se known manner, with portions which move gradually away from the axis 6a of the needle cylinder and with portions which gradually move closer to said axis 6a in order to produce the characteristic radial movement of the sinkers in the corresponding slots of the sinker ring 5.
  • the set of actuation cams also comprises movable countercams 21, 22 and 23 which face, with their profile 21a, 22a and 23a, the profile 20a of the annular cam 20.
  • the movable countercams 21, 22 and 23 are arranged at mutually different elevations so as to match the different elevation of the heels 2a, 3a and 4a of the lowering sinkers 2, 3 and 4.
  • the movable countercam 21 is located at such an elevation as to interfere with the heel 2a of the sinkers 2, which is higher than the heel 3a of the sinkers 3.
  • the movable countercam 22 is arranged at a lower level than the movable countercam 21, so that it can interfere both with the heel 2a of the sinkers 2 and with the heel 3a of the sinkers 3, whilst the movable countercam 23 is located below the bottom of the radial slots of the sinker ring 5, so that it can interfere only with the heel 4a of the sinkers 4 that protrudes downward from said slots.
  • the movable countercams 21, 22 and 23 are packed together and are pivoted to the sinker ring 5 about an axis 30 which is parallel to the axis 6a of the needle cylinder 6, so that they can be moved from an inactive position, in which their profile 21a, 22a and 23a is spaced from the profile 20a of the annular cam 20 so as not to interfere with the corresponding heels of the sinkers 2, 3 and 4, to an active position, in which said movable countercams are closer, with their profile 21a, 22a and 23a, to the profile 20a of the annular cam 20, so as to interfere with the corresponding heels of the sinkers 2, 3 and 4.
  • the movable countercams 21, 22 and 23 can oscillate individually about the axis 30, for example by means of actuators of the electromagnetic, pneumatic, mechanical type or of other conventional types, according to the requirements.
  • the result is knitting with terry stitches on half of the needles of the needle cylinder 6, whilst if the movable countercams 21 and 23 are moved into the active position, the result is knitting with terry stitches on the other half of the needles of the needle cylinder 6; if the movable countercams 21, 22 and 23 are moved into the active position, the result is knitting with terry stitches on all the needles of the needle cylinder 6, except of course for any needle selections which remove some of the needles from knitting.
  • the set of actuation cams comprises, in the region of the path 1 that corresponds to the descent of the needles 10 to form loops of knitting with the two yarns dispensed at a feed of the machine, a movable cam 40 which can be moved on command into two active positions in order to produce at least one variation of the path followed by the heels 2a of the sinkers 2 with respect to the path 1.
  • the movable cam 40 can be moved from a first position, in which it produces, with its profile 40a, a spacing of the sinkers 2 with respect to the axis 6a of the needle cylinder and with respect to the path 1 so as to shift the yarn 60 rested on the lower lowering plane 7 of the sinkers 2 away from the axis 6a of the needle cylinder 6.
  • the movable cam 40 can move from said first position to a second position in which it does not interfere with the heels 2a of the sinkers 2 but instead acts, with another second profile 40b, on the back 2b of the sinkers 2 which is directed toward the heel 2a, so as to anticipate the motion of the sinkers 2 toward the axis 6a of the needle cylinder 6 in order to shift the yarn 60, rested on the lower lowering plane 7 of the sinkers 2, toward the axis 6a of the needle cylinder, as will become apparent hereinafter.
  • the movable cam 40 is partially superimposed on the annular cam 20 and is slidingly accommodated within a recess 50 formed on the upper face of the annular cam 20.
  • Said recess 50 is meant to allow the sliding of the movable cam 40 in a substantially radial direction with respect to the axis 6a of the needle cylinder 6 and simultaneously to guide the movable cam 40 during said movement.
  • the movable cam 40 lies on a plane which is substantially perpendicular to the axis 6a of the needle cylinder and can move, in order to pass from the first position to the second position, along a direction which is substantially radial with respect to the needle cylinder 6.
  • the movable cam 40 has a first profile 40a which is formed by the side of the cam that is directed away from the axis 6a of the needle cylinder 6, i.e., faces the movable countercams 21, 22 and 23 and engages the side of the heels 2a of the sinkers 2 that is directed toward the axis 6a of the needle cylinder 6.
  • the movable cam 40 also has a second profile 40b, which is formed by the side of the movable cam 40 that is directed toward the axis 6a of the needle cylinder 6 and can engage, when the movable cam 40 is moved into the second position, the back 2b of the sinker 2 that is directed toward the heel 2a.
  • the first profile 40a is constituted, along the direction of motion of the sinkers with respect to the cams and countercams that actuate them, by a first portion which moves gradually away from the axis 6a of the needle cylinder 6 and is followed by a second portion which gradually approaches the axis of the needle cylinder.
  • the second profile 40b of the movable cam 40 is constituted by a first portion which gradually approaches the axis 6a of the needle cylinder 6 and is followed by a second portion which gradually moves away from the axis 6a of the needle cylinder 6.
  • the movable cam 40 is shaped so as to have a substantially diamond-like plan shape with rounded corners.
  • the side of the countercam 21 that faces the first profile of the movable cam 40 has, at the end of the first portion of the first profile 40a of said movable cam 40, a recessed region 70 to allow the movement of the sinkers 2 away from the axis 6a of the needle cylinder 6.
  • the movement of the movable cam 40 from the first position to the second position or vice versa can be performed by virtue of conventional actuators, for example actuators of the mechanical, pneumatic, electromagnetic type, etcetera.
  • figures 1 and 2 relate to a circular hosiery knitting machine with four feeds or drops and that there is a movable cam 40 for each feed.
  • the movable cam 40 is moved into the second position (figure 2).
  • the two yarns 60 and 61 dispensed at a feed of the machine rest, when the needles 10 begin their descent, respectively on the lowering plane 7 of the sinkers 2 and on the lowering plane 8 or 9 of the sinkers 3 or 4.
  • the sinkers 2 engage, with their back 2b, along the second profile of the movable cam 40, the sinkers 2 are moved toward the axis 6a of the needle cylinder 6.
  • This movement also produces the movement of the yarn 60, which rests on the lowering plane 7 of the sinkers 2, toward the axis 6a of the needle cylinder and therefore the movement of said yarn 60, which constitutes the yarn by means of which the shorter loops of knitting are formed, toward the right side of the item.
  • the movable cam 40 is moved into the first position (figure 1) so that the sinkers 2 are moved, after the yarn 60 has rested on the lowering plane 7, away from the axis 6a of the needle cylinder 6, consequently positioning the yarn 60, i.e., the yarn that is used to form the shorter loops, on the back of the item.
  • the invention fully achieves the intended aim, since it allows to provide, with a single set of sinker actuation cams and therefore without requiring any replacement of the elements that compose the machine, both standard-terry knitting and sandwich-terry knitting.
  • the materials used, as well as the dimensions, may be any according to the requirements and the state of the art.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (10)

  1. Jeu de cames pour la commande des platines d'abaissement (2, 3, 4) pour des machines à tricoter circulaires, pour produire des mailles bouclées standards et des mailles bouclées sandwich, comportant des cames (20) et contre-cames (21, 22, 23) qui forment un trajet (1) pour les talons (2a, 3a, 4a) des platines d'abaissement (2, 3, 4) qui ont deux plans d'abaissement (7, 8, 9) disposés à des niveaux mutuellement différents pour au moins deux fils (60, 61) qui sont distribués à une alimentation de la machine pour former des boucles de tricot bouclé, caractérisé en ce qu'il comporte, dans la zone dudit trajet (1) qui correspond à la descente des aiguilles (10) du cylindre à aiguilles (6) pour former des boucles de tricot avec les deux fils (60, 61) distribués à une alimentation de la machine, une came (40) qui peut se déplacer sur commande dans deux positions de fonctionnement afin de produire au moins une variation du trajet (1) suivi par les talons (2a, 3a, 4a) des platines (2, 3, 4) due auxdites cames (20) et contre-cames (21, 22, 23); ladite came mobile (40) ayant un premier profil (40a) avec lequel peuvent venir en contact les talons (2a, 3a, 4a) des platines (2, 3, 4) et qui est adapté pour produire, lorsque ladite came mobile (40) est dans une première desdites deux positions, un écartement des platines (2, 3, 4) à partir de l'axe (6a) du cylindre à aiguilles (6) par rapport audit trajet (1) afin d'éloigner le fil (60, 61), en appui sur le plan d'abaissement inférieur (11) des platines (2, 3, 4), de l'axe (6a) du cylindre à aiguilles (6).
  2. Jeu de cames selon la revendication 1, caractérisé en ce que ladite came mobile (40) a un second profil (40b) avec lequel les platines (2, 3, 4) peuvent venir en contact lorsque ladite came mobile (40) est dans la seconde desdites deux positions, et est adapté pour anticiper, par rapport audit trajet (1), le déplacement des platines (2, 3, 4) vers l'axe de cylindre à aiguilles (6a) afin de déplacer le fil (60, 61), en appui sur le plan d'abaissement inférieur (11) des platines (2, 3, 4), vers l'axe de cylindre à aiguilles (6a).
  3. Jeu de cames selon les revendications 1 et 2, caractérisé en ce que ladite came mobile (40) est située dans un plan qui est sensiblement perpendiculaire à l'axe de cylindre à aiguilles (6a) et peut se déplacer sur commande afin de passer de la première desdites deux positions vers la seconde desdites deux positions, selon une direction qui est sensiblement radiale par rapport au cylindre à aiguilles (6).
  4. Jeu de cames selon une ou plus des revendications précédentes, caractérisé en ce que ledit premier profil (40a) est formé par le côté de ladite came mobile (40) qui est dirigé à l'opposé de l'axe de cylindre à aiguilles (6a); ledit premier profil (40a), lorsque ladite came mobile (40) est dans ladite première position, venant en contact avec le côté des talons (2a, 3a, 4a) des platines (2, 3, 4) qui est dirigé vers l'axe de cylindre à aiguilles (6a).
  5. Jeu de cames selon une ou plus des revendications précédentes, caractérisé en ce que ledit second profil (40b) est formé par le côté de ladite came mobile (40) qui est dirigé vers l'axe de cylindre à aiguilles (6a), ledit second profil (40b) pouvant être mis en contact, lorsque ladite came mobile (40) est dans ladite seconde position, avec l'arrière (2b) desdites platines (2) qui se trouve à l'opposé par rapport au talon (2a).
  6. Jeu de cames selon une ou plus des revendications précédentes, caractérisé en ce que ledit premier profil (40a) de la came mobile (40) a une première partie qui s'éloigne graduellement de l'axe de cylindre à aiguilles (6a) et est suivie par une seconde partie qui se rapproche graduellement de l'axe de cylindre à aiguilles (6a).
  7. Jeu de cames selon une ou plus des revendications précédentes, caractérisé en ce que ledit second profil (40b) a une première partie qui se rapproche graduellement de l'axe de cylindre à aiguilles (6a) et est suivie par une seconde partie qui s'éloigne graduellement de l'axe de cylindra à aiguilles (6a).
  8. Jeu de cames selon une ou plus des revendications précédentes, caractérisé en ce que ladite came mobile (40) est sensiblement conformée, en vue de dessus, comme un losange à coins arrondis.
  9. Jeu de cames selon une ou plus des revendications précédentes, caractérisé en ce que la came (20) ou contre-came (21, 22, 23) qui est dirigée vers le côté de ladite came mobile (40) qui est dirigé à l'opposé du cylindre à aiguilles (6) comporte une zone évidée (70) afin de permettre aux platines (2, 3, 4) de s'éloigner du cylindre à aiguilles (6) lorsque ladite came mobile (40) est dans ladite première position.
  10. Jeu de cames selon une ou plus des revendications précédentes, caractérisé en ce que ladite came mobile (40) recouvre partiellement une desdites cames (20) qui s'étend dans une configuration sensiblement annulaire autour de l'axe de cylindre à aiguilles (6a) et est reçue de manière coulissante dans un évidement (50) formé sur la face supérieure de ladite came annulaire (20).
EP98108804A 1998-05-14 1998-05-14 Jeu de cames pour la commande des platines d'abaissement dans des métiers à tricoter circulaires pour la formation de tricot bouclette standard et tricot bouclette sandwich Expired - Lifetime EP0957193B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE69813507T DE69813507T2 (de) 1998-05-14 1998-05-14 Senkerplatine-Schlosssystem für Rundstrickmaschinen zum Formen von Standard-Schlingengestrick und Sandwich-Schlingengestrick
ES98108804T ES2193438T3 (es) 1998-05-14 1998-05-14 Juego de levas para el gobierno de las platinas de descenso en maquinas circulares de genero de punto para la formacion de tejidos de genero de punto de rizo estandar y sandwich.
EP98108804A EP0957193B1 (fr) 1998-05-14 1998-05-14 Jeu de cames pour la commande des platines d'abaissement dans des métiers à tricoter circulaires pour la formation de tricot bouclette standard et tricot bouclette sandwich

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98108804A EP0957193B1 (fr) 1998-05-14 1998-05-14 Jeu de cames pour la commande des platines d'abaissement dans des métiers à tricoter circulaires pour la formation de tricot bouclette standard et tricot bouclette sandwich

Publications (2)

Publication Number Publication Date
EP0957193A1 EP0957193A1 (fr) 1999-11-17
EP0957193B1 true EP0957193B1 (fr) 2003-04-16

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EP98108804A Expired - Lifetime EP0957193B1 (fr) 1998-05-14 1998-05-14 Jeu de cames pour la commande des platines d'abaissement dans des métiers à tricoter circulaires pour la formation de tricot bouclette standard et tricot bouclette sandwich

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EP (1) EP0957193B1 (fr)
DE (1) DE69813507T2 (fr)
ES (1) ES2193438T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20110314A1 (it) * 2011-03-01 2012-09-02 Santoni & C Spa Platina di abbattitura perfezionata per macchine circolari per maglieria o per calzetteria, ad elevata resistenza contro il pericolo di danneggiamenti causabili dagli aghi contigui.
CN105155119A (zh) * 2015-08-11 2015-12-16 招文瀚 圆纬机的沉降片三角座的安装装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR692960A (fr) * 1929-07-03 1930-11-13 Perfectionnement apporté aux métiers circulaires de bonneterie
US3937037A (en) * 1974-01-09 1976-02-10 Scott & Williams, Inc. Method and apparatus for knitting terry fabric

Also Published As

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DE69813507D1 (de) 2003-05-22
DE69813507T2 (de) 2004-04-08
EP0957193A1 (fr) 1999-11-17
ES2193438T3 (es) 2003-11-01

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