EP0683257B1 - Rundstrickmaschine mit Platinen zum Festhalten des Gestricks - Google Patents

Rundstrickmaschine mit Platinen zum Festhalten des Gestricks Download PDF

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Publication number
EP0683257B1
EP0683257B1 EP95106936A EP95106936A EP0683257B1 EP 0683257 B1 EP0683257 B1 EP 0683257B1 EP 95106936 A EP95106936 A EP 95106936A EP 95106936 A EP95106936 A EP 95106936A EP 0683257 B1 EP0683257 B1 EP 0683257B1
Authority
EP
European Patent Office
Prior art keywords
needle
sinkers
supporting element
knitting
retention
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
EP95106936A
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English (en)
French (fr)
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EP0683257A1 (de
Inventor
Severino Ossensi
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.)
Mec Mor SRL
Original Assignee
Mec Mor SpA
Mecmor SpA
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Filing date
Publication date
Application filed by Mec Mor SpA, Mecmor SpA filed Critical Mec Mor SpA
Publication of EP0683257A1 publication Critical patent/EP0683257A1/de
Application granted granted Critical
Publication of EP0683257B1 publication Critical patent/EP0683257B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D04B15/14—Needle cylinders
    • 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

Definitions

  • the present invention relates to a circular knitting machine with knitting retention sinkers.
  • Circular knitting machines with two needle holders that is to say, machines having a needle cylinder and a plate that is arranged above the needle cylinder and coaxially thereto and is also provided with needles interleaved between the needles carried by the cylinder, are known.
  • the knitting is generally produced by using both needle holders of the machine so that the needles of the cylinder cooperate with the needles of the plate in forming the knitting.
  • the knitting is formed by using only the cylinder needles while the needles of the plate retain the last formed row of knitting.
  • the traction that is usually applied to the already-formed knitting by means of appropriate devices is discharged exclusively onto the row retained by the needles of the plate, while the needles of the cylinder continue to knit, producing an excess of knitting on which the traction is practically ineffective.
  • the resulting excess knitting can easily overflow and escape from the tip of the needles of the cylinder during the formation of the stitch, causing the loss of stitches and therefore leading to the formation of a product to be rejected.
  • sinkers that are placed in the same slots of the cylinder that accommodate the needles.
  • Said sinkers are controllably slideable, along a direction that is parallel to the direction along which the needles of the cylinder are actuated; said sinkers act, with their tip or beak, on the formed knitting loops to prevent the loops that are being formed from disengaging from the needles.
  • these sinkers act predominantly on the knitting loops retained by the needles of the plate, and although they improve the situation, they do not fully solve the problem, since they are unable to avoid, with acceptable reliability, the loss of stitches in the knitting that is being formed.
  • transfer knitting in which no new loops are formed but one loop is simply transferred from a needle of one needle holder to a needle of the opposite needle holder.
  • This operation can be performed by making the needles that cast off the loops protrude from the corresponding needle holder until their part, known as lifting shoulder, that is provided to raise the loop reaches a position that allows the corresponding needle of the other needle holder to enter a spring-loaded element located on one side of the casting-off needle and to engage the loop with a subsequent movement.
  • This operation can be performed by selecting the needles that must cast off the loops but not necessarily those that must engage them.
  • the engaging needles in fact already perform a movement that is capable of engaging the loop, provided that said loop is carried by the casting-off needle into a position in which said loop is engageable.
  • said casting-off needles since the casting-off needles are extracted from the corresponding needle holder beyond the normal knitting level in order to ensure that the loop is engaged by the needles that must engage it, said casting-off needles also drag towards the opposite needle holder the adjacent knitting, which must not be transferred.
  • this step if all the needles of the opposite needle holder are made to protrude, they haphazardly also engage loops that should not be transferred, thus causing abnormal knitting.
  • EP-0 421 242 A3 in the name of the same applicant of the present invention, discloses a circular knitting machine with retention sinkers as defined in the preamble of claim 1.
  • a principal aim of the present invention is to solve the problems described above by providing a circular knitting machine with knitting retention sinkers that is capable of reliably avoiding the occurrence of anomalies in the formation of the stitches of knitting.
  • an object of the invention is to provide a circular knitting machine with knitting retention sinkers that is capable of avoiding the accidental escape of loops from the tip of the active needles, so as to safely prevent loss of stitches in the knitting being formed.
  • Another object of the invention is to provide a circular knitting machine with stitch retention sinkers that are simple to produce and can be installed in the machine simply and rapidly.
  • Another object of the invention is to provide a machine with stitch retention sinkers that are highly efficient in operation both with elastic threads and with very rigid threads.
  • the machine according to the invention comprises, in a per se known manner, a plurality of needles 2 that are accommodated in slots 3 formed in a needle supporting element 4 that can be constituted by the needle cylinder, as shown, or by the plate.
  • the needles 2 have, in a known manner, a heel, not shown for the sake of simplicity, that protrudes from the corresponding slot transversely to the longitudinal extension of said slot and engages in paths formed by a set of cams that face the needle supporting element.
  • Each needle by engaging with its heel in the paths formed by the set of cams, due to the movement of said set of cams with respect to the needle supporting element transversely to the longitudinal extension of the slots 3, is moved from an extracted position, in which its tip 2a protrudes from a longitudinal end of the corresponding slot 3 to engage a thread 5 fed by an appropriately provided thread guide 6, to a retracted position, in which the tip 2a of the needles is retracted into the corresponding slot 3, so as to form a loop of knitting with the engaged thread 5 while the previously formed loop of knitting is cast off the needle.
  • the machine according to the invention can be of the type with a single needle holder or with two mutually facing needle holders.
  • the various figures show a machine with two needle holders, in which the second needle holder is constituted by another needle supporting element 7, which is constituted by the plate in the case described and in which a plurality of slots 8 are formed; each slot accommodates a needle 9, the tip 9a whereof is directed towards the needle supporting element 4 of the other needle holder.
  • the slots 3 of the first needle holder and the slots 8 of the second needle holder face each other with one of their longitudinal ends, from which the tip of the corresponding needle protrudes, so that the needles of one needle holder cooperate with the needles of the other needle holder, forming the knitting 10 that descends between the two needle holders.
  • the needles 9 of the second needle holder are actuated in a per se known manner by means of a set of cams that face the slots 8 of the needle supporting element 7 and form paths for the heels of the needles 9, so as to cause them to pass, like the needles of the needle supporting element 4, from an extracted position, in which their tip protrudes from the corresponding slot 8 so as to engage the thread fed by an appropriately provided thread guide, to a retracted position, in which the tip 9a of the needles 9 is retracted into the corresponding slot so as to form loops of knitting with the engaged thread, while the previously formed loops of knitting are cast off by the needles between the two needle holders.
  • the machine according to the invention is provided with a plurality of sinkers 11 that are arranged alternately between the needles 2; each sinker is arranged laterally to a needle 2 in the same slot 3.
  • each one of said sinkers 11 the end located proximate to the longitudinal end of the corresponding slot 3 from which the tip 2a of the corresponding needle 2 protrudes to engage the thread 5 is provided with a beak 11a that is directed towards the bottom 3a of the slot 3.
  • Each one of the sinkers 11 is individually oscillatable, by virtue of the action of actuation means, on a plane that lies substantially at right angles to the bottom of the corresponding slot 3, so as to move the beak 11a of the sinker from a retention position, in which said beak 11a engages the knitting 10 formed by the corresponding needle 2, to a release position, in which the beak 11a is disengaged from the knitting 10, and vice versa.
  • each sinker 11 is pivoted to the needle supporting element 4. Pivoting is achieved by means of a first portion 11b of the sinker that is hook-shaped and engages a wire-like element 13 that is connected to the needle supporting element 4 transversely to the longitudinal extension of the slots 3.
  • the sinker 11 also has, on the opposite side with respect to the one directed towards the bottom of the slot 3, a second portion 11c that is also hook-shaped but curves in the opposite direction with respect to the curve of the first portion 11b; said second portion engages another wire-like element 14 which is also connected to the needle supporting element 4 transversely to the longitudinal extension of the slots 3.
  • the sinker 11 is retained inside the corresponding slot 3, laterally to the needle 2, since it is retained by the coupling of the hook-shaped portions 11b and 11c that contrast its sliding in the direction for the extraction of the adjacent needle 2.
  • the means for actuating the oscillation of the sinker 11 comprise at least one cam; in the illustrated embodiment, there are two cams 15 and 16 that laterally face the needle supporting element 4 and are adapted to engage two portions 11d and 11e of the sinker that protrude from the slot 3 and are spaced, in opposite regions, along the longitudinal extension of the sinker 11, with respect to the first portion 11b that is pivoted to the needle supporting element 4. More particularly, there is a first cam 15 movable with respect to the needle supporting element 4 transversely to the longitudinal extension of the slots 3 and having at least one raised portion 15a extending towards the needle supporting element 4 and engaging the region 11d of the sinker 11 that is located between the first portion 11b, pivoted to the needle supporting element 4, and the beak 11a. In this manner, the engagement of the sinker with the raised portion 15a during the movement of the first cam 15 with respect to the needle supporting element 4 causes the oscillation of the sinker 11 from the release position to the retention position.
  • the second cam 16 is also movable with respect to the needle supporting element 4 along a direction that is transverse to the longitudinal extension of the slots 3, and is provided with a raised portion 16a that protrudes towards the needle supporting element 4 and can engage, during the movement of the cam 16 with respect to the needle supporting element 4, the region 11e of the sinker 11 that is located proximate to the end of the sinker that lies opposite with respect to the beak 11a.
  • the engagement of the sinker with the raised portion 16a of the second cam 16 produces the oscillation of the sinker from the retention position to the release position, as will become apparent hereinafter.
  • the cams 15 and 16 can be associated with the set of cams that actuate the needles 2 and are arranged with respect to the cams for actuating the needles 2 so that the raised portion 16a is located at the cams that cause the retraction of the needle in the corresponding slot 3 and so that the raised portion 15a of the first cam 15 is located at the cams that cause the protrusion of the tip of the needle from the corresponding slot 3.
  • a retention sinker located in one needle holder of the machine has been described for the sake of simplicity, but it is possible to provide similar sinkers on the other needle holder of the machine as well.
  • the sinker 11 is in the release position, so as to avoid hindering the correct formation of the new loops of knitting.
  • the sinker 11 is kept in this release position owing to the fact that the region 11e of the sinker engages the raised portion 16a of the second cam 16.
  • the first cam 15 engages, with its raised portion 15a, against the region 11d of the sinker 11, causing its oscillation about the wire-like element 13 from the release position to the retention position, in which it engages, with its beak 11a, the previously formed knitting 10, so that said knitting does not follow the needle during its exit from the corresponding slot.
  • the region 11d of the sinker engages the raised portion 15a of the first cam 15, the raised portion 16a is no longer present, so that the sinker can correctly oscillate from the release position to the retention position.
  • the cam 16 again engages the raised portion 16a with the region 11e of the sinker, while the raised portion 15a of the first cam 15 is no longer present, thus achieving the transfer of the sinker from the retention position to the release position. At this point the operating cycle continues as already described.
  • the retention sinker avoids knitting anomalies also during the transfer of the loops from one needle holder to the next.
  • the retention sinkers by engaging the loops freshly formed on one needle holder with the beak 11a, prevent the adjacent loops from being raised by the needle 2 while said needle is moved so as to protrude from the corresponding needle holder until the loop to be transferred is moved into a position that allows it to be engaged by the corresponding needle 9 of the other needle holder.
  • the needle 9 accordingly passes through a spring-loaded element 30 connected in a known manner to one side of the needle 2, engaging, during its subsequent motion, the loop to be transported with no possibility of interference with the adjacent loops, which are retained by the action of the sinkers 11.
  • the retention sinkers according to the invention also have the advantage that they make it particularly easy to form the loops when knitting begins.
  • the sinusoidal shape given to the thread by the needles during loop formation can be knitted correctly into the previous one only if there is a mechanical action, applied on said previous sinusoidal shape, that stretches it towards the rear part of the needle, that is to say, the part that lies opposite to the open tip of the needle.
  • This action is usually applied by a mechanical traction device based on rollers or with equivalent belt tensioners. When knitting begins, this traction is not present, since conventional traction devices cannot engage previously formed knitting.
  • the presence of the retention sinkers according to the invention automatically meets with this need, since the sinkers, by penetrating between the needles, and by retaining the previously formed row of knitting in the rearward position of the needles, allow said needles to form a sinusoidal shape that is correctly knitted in with the previous one, that is to say, an actual row of knitting even without traction on the knitting itself.
  • FIGs 6 to 9 schematically illustrate the fitting of a retention sinker 11 inside the slot 3 of the needle supporting element 4.
  • the retention sinker 11 can be fitted simply by removing a sector of the set of cams that actuate the needles and the sinkers and by inserting the retention sinker 11 between the wire-like elements 13 and 14 connected to the needle supporting element.
  • the particular shape of the first portion 11b and of the second portion 11c achieves the correct engagement of the sinker with the wire-like elements 13 and 14 that retain the sinker inside the corresponding slot.
  • the previously removed cam sector is again fitted laterally with respect to the needle supporting element 4.
  • the materials employed, 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)
  • Sewing Machines And Sewing (AREA)
  • Enzymes And Modification Thereof (AREA)

Claims (8)

  1. Rundstrickmaschine mit einer Maschenhalteplatine, bestehend aus einer Vielzahl von Nadeln (2), welche in in zumindest einem Nadelträgerelement (4) ausgebildeten Schlitzen (3) aufgenommen und kontrollierbar entlang der Längserstreckung des entsprechenden Schlitzes aus einer ausgezogenen Position, in welcher die Spitze (2a) der Nadeln (2) von einem Längsende des entsprechenden Schlitzes (3) zwecks Eingriffs in zumindest einen von einer Fadenführung (6) herangeführten Faden (5) vorspringt, in eine zurückgezogene Position bewegt wird, in welcher die Spitze (2a) der Nadeln (2) in den entsprechenden Schlitz (3) zur Bildung einer Strickschlaufe mit dem in Eingriff befindlichen Faden (5) zurückgezogen wird und umgekehrt; ferner aus einer Mehrzahl von Platinen (11), welche abwechselnd zwischen den Nadeln (2) und jeweils seitlich zu einer Nadel (2) angeordnet sind, wobei das Ende jeder der Platinen (11), welches dem Längsende des entsprechenden Schlitzes (3) benachbart ist, von welchem die Spitze (2a) der entsprechenden Nadel (2) vorspringt, um mit dem Faden (5) in Eingriff zu treten (5), mit einem entsprechenden , auf den Boden des Schlitzes (3) gerichteten Horn versehen ist, wobei jede Platine (11) aufgrund der Wirkung eines Betätigungsmittels (15,16) einzeln auf einer zum Boden des entsprechenden Schlitzes (3) im wesentlichen rechtwinkligen Ebene hin und her schwingen kann, um das Horn (11a) aus der Halteposition, in welcher es sich mit dem von der entsprechenden Nadel (2) gebildeten Gestrick (10) in Eingriff befindet, in eine Freigabeposition zu bewegen, in welcher das Horn (11a) von dem Gestrick (10) gelöst ist, und umgekehrt, dadurch gekennzeichnet, daß jede der Platinen (11) an ein Nadelträgerelement (4) mit einem Zwischenabschnitt angelenkt ist.
  2. Maschine nach Anspruch 1, dadurch gekennzeichnet, daß der Zwischenabschnitt mit einem im wesentlichen hakenförmigen ersten Teil (11b) versehen ist, welcher mit einem drahtförmigen Element (13) in Eingriff tritt, welches drahtförmige Element mit dem Nadelhalter (4) quer zur Längserstreckung der Schlitze (3) verbunden ist.
  3. Maschine nach Ansprüchen 1 und 2, dadurch gekennzeichnet, daß jede Platine (11) in einem Schlitz (3) aufgenommen wird, welcher die entsprechende Nadel (2) enthält und seitlich zu dieser verläuft.
  4. Maschine nach Anspruch 2, gekennzeichnet durch Haltemittel (11b, 13, 11c, 14), welche mit der Platine (11) in Eingriff treten, um in entgegengesetzter Richtung zu gleiten, um die Nadel (2) herauszuziehen.
  5. Maschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Haltemittel ein drahtförmiges mit dem hakenförmigen ersten Abschnitt (11b) in Eingriff tretendes Element (13) und ein zweites drahtförmiges Element aufweisen, welches mit dem Nadelträgerelement quer zum Längsverlauf der Schlitze (3) verbunden ist und mit einem zweiten hakenförmigen Abschnitt (11c) der Platine (11) in Eingriff tritt, wobei der zweite hakenförmige Abschnitt (11c) sich entgegengesetzt zur Krümmung des ersten hakenförmigen Abschnitts (11b) krümmt.
  6. Maschine nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Betätigungsmittel zumindest einen Nocken (15) aufweisen, welcher dem Nadelträgerelement (4) gegenüberliegt und zu diesem in einer sich quer zum Längsverlauf des Schlitze (3) erstreckenden Richtung beweglich ist, wobei der Nocken (15) zumindest einen erhabenen Abschnitt (15a) aufweist, welcher sich in Richtung auf das Nadelträgerelement (4) erstreckt und mit einem Abschnitt (11d) der Platinen (11) in Eingriff tritt, welcher zwischen dem ersten hakenförmigen Abschnitt (11b) und dem Horn (11a) liegt, um die Platinen (11) aus der Freigabe- in die Halteposition zu schwingen.
  7. Maschine nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Betätigungsmittel einen ersten Nocken (15) und einen zweiten Nocken (16) aufweisen, welche dem Nadekrägerelement (4) gegenüberliegen und zu diesem in einer quer zur Längserstreckung der Schlitze (3) verlaufenden Richtung beweglich sind, wobei der erste Nocken (15) zumindest einen ersten erhabenen Abschnitt (15a) aufweist, welcher in Richtung auf das Nadelträgerelement (4) verläuft, und wobei der zweite Nocken (16) einen zweiten erhabenen Abschnitt (16a) aufweist, welcher sich im Abstand vom ersten erhabenen Abschnitt (15a) in der Bewegungsrichtung der Nocken (15,16) zum Nadelträgerelement (4) befindet, wobei der erste erhabene Abschnitt (15a) und der zweite erhabene Abschnitt (16a) mit den Abschnitten (11d, 11e) der Platinen (11) in Eingriff treten, welche in gegenüberliegenden Abschnitten von demjenigen Abschnitt im Abstand angeordnet sind, in dem die Platinen an das Nadleträgerelement (4) angelenkt sind, um die Platinen (11) aus der Freigabeposition in die Halteposition und umgekehrt zu schwingen.
  8. Maschine nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, daß eine Ausnehmung (17) auf dem Boden der Schlitze (3) ausgebildet ist und die Platinen (11) teilweise aufnimmt.
EP95106936A 1994-05-16 1995-05-08 Rundstrickmaschine mit Platinen zum Festhalten des Gestricks Expired - Lifetime EP0683257B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI940982 1994-05-16
ITMI940982A IT1269782B (it) 1994-05-16 1994-05-16 Macchina circolare per maglieria con platine di trattenimento della maglia

Publications (2)

Publication Number Publication Date
EP0683257A1 EP0683257A1 (de) 1995-11-22
EP0683257B1 true EP0683257B1 (de) 1999-08-04

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Application Number Title Priority Date Filing Date
EP95106936A Expired - Lifetime EP0683257B1 (de) 1994-05-16 1995-05-08 Rundstrickmaschine mit Platinen zum Festhalten des Gestricks

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EP (1) EP0683257B1 (de)
DE (1) DE69511164T2 (de)
ES (1) ES2137399T3 (de)
IT (1) IT1269782B (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI0713276B1 (pt) * 2006-07-07 2018-10-23 Santoni & C Spa máquina de malharia com agulhas de lingueta e sem platinas
ITMI20061320A1 (it) * 2006-07-07 2008-01-08 Santoni & C Spa Macchina per maglieria con aghi a linguetta e senza platine di abbattitura ad elevata affidabilita' di funzionamento
ITMI20071098A1 (it) * 2007-05-30 2008-11-30 Santoni & C Spa Macchina per maglieria con aghi a linguetta e senza platine di abbattitura, ad elevata affidabilita' di funzionamento.
IT1392878B1 (it) * 2009-02-04 2012-04-02 Busi Giovanni Srl Macchina circolare da calzetteria e/o maglieria perfezionata
DE102010054540A1 (de) * 2010-12-15 2012-06-21 Ulrich Hofmann Vereinfachte Single-Rundstrickmaschine
CN102995268A (zh) * 2011-09-14 2013-03-27 佰龙机械厂股份有限公司 横式编织机的下压网眼机构及其沉降片
EP2570531B1 (de) * 2011-09-15 2014-03-05 Pai Lung Machinery Mill Co., Ltd. Mechanismus zum Runterdrücken eines Gestricks und entsprechende Platine für Flachstrickmaschinen
CN102505317A (zh) * 2011-09-30 2012-06-20 洪荣豪 一种圆形针筒的耐磨结构
PT3643822T (pt) * 2018-10-23 2021-07-26 Groz Beckert Kg Dispositivo para a formação de laçada, meios de deslocador e método para a formação de laçada
CN112760797B (zh) * 2020-12-30 2024-09-27 连云港元丰机械制造有限公司 高密针盘

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3320043A1 (de) * 1983-06-03 1984-12-06 Terrot Strickmaschinen GmbH, 7000 Stuttgart Maschenbildende maschine
DE3433290C2 (de) * 1984-09-11 1986-09-18 SIPRA Patententwicklungs- und Beteiligungsgesellschaft mbH, 7470 Albstadt Strickmaschine
IT1237987B (it) * 1989-10-03 1993-06-19 Mecmor Spa Macchina per maglieria con platine di trattenimento della maglia.
US5355699A (en) * 1992-04-16 1994-10-18 Tsudakoma Kogyo Kabushiki Kaisha Flat knitting machine and a method of operating the rocking sinkers of the flat knitting machine
IT1264204B1 (it) * 1993-09-06 1996-09-23 Emm Srl Dispositivo per trattenere i ranghi di maglia in formazione in una macchina rettilinea per maglieria

Also Published As

Publication number Publication date
DE69511164T2 (de) 1999-11-25
DE69511164D1 (de) 1999-09-09
ES2137399T3 (es) 1999-12-16
ITMI940982A1 (it) 1995-11-16
IT1269782B (it) 1997-04-15
ITMI940982A0 (it) 1994-05-16
EP0683257A1 (de) 1995-11-22

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