EP1155176B1 - A method and apparatus for stretching and collecting a knitted fabric produced by circular knitting machines - Google Patents

A method and apparatus for stretching and collecting a knitted fabric produced by circular knitting machines Download PDF

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Publication number
EP1155176B1
EP1155176B1 EP00909622A EP00909622A EP1155176B1 EP 1155176 B1 EP1155176 B1 EP 1155176B1 EP 00909622 A EP00909622 A EP 00909622A EP 00909622 A EP00909622 A EP 00909622A EP 1155176 B1 EP1155176 B1 EP 1155176B1
Authority
EP
European Patent Office
Prior art keywords
piece
stretching
rollers
collecting
roller
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
EP00909622A
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German (de)
English (en)
French (fr)
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EP1155176A1 (en
Inventor
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.)
Vignoni Srl
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Vignoni Srl
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Filing date
Publication date
Application filed by Vignoni Srl filed Critical Vignoni Srl
Publication of EP1155176A1 publication Critical patent/EP1155176A1/en
Application granted granted Critical
Publication of EP1155176B1 publication Critical patent/EP1155176B1/en
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
    • D04B15/88—Take-up or draw-off devices for knitting products
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/34—Devices for cutting knitted fabrics

Definitions

  • the present invention relates to a method and an apparatus for stretching and collecting a knitted fabric produced by circular knitting machines comprising the phases of substantially flattening a tubular piece coming from the circular machine, progressively cutting the flattened tubular piece along a longitudinal generatrix, spreading the piece and its lateral edges obtained from its cutting, stretching the spread piece in a single layer of fabric, and collecting the stretched.piece into a roll.
  • the apparatus comprises a support frame positioned inferiorly to said circular knitting machine and able to rotate integrally with its cylinder, means for substantially flattening the tubular piece coming from the circular machine, cutting means positioned downstream of said flattening means and able to cut the tubular piece longitudinally along a generatrix, means for opening and stretching the cut piece in a single layer of fabric, and an assembly for collecting the piece stretched in a single layer.
  • the traditional method and apparatuses for stretching and collecting into rolls or superposed layers the knitted fabrics produced by circular knitting machines provide for the tubular pieces exiting therefrom to be subjected to downward traction and gradually flattened until they reach the final conformation with two superposed planar layers.
  • This traditional technique entails, in the case of elastic and/or delicate yarns and in the presence of weak knit structures, the formation of two permanent lateral creases, difficult or impossible to remove, which cause negative effects also in the fabric finishing operation.
  • the aforementioned US Patent provides for positioning a walkway platform around the circular machine, above the apparatus for stretching and collecting the fabric or, alternatively, for inserting the latter in a pit obtained in the ground of the factory. It is evident that in the first case access to the circular machine is not immediate, since it is necessary to climb on the walkway, whilst in the second case additional operating costs are incurred both for removing the piece collected in a roll and for maintaining the apparatus and the pit.
  • the technical task constituting the basis for the present invention is to provide a method and an apparatus for stretching and collecting the knitted fabric produced by circular knitting machines able substantially to overcome the aforementioned drawbacks.
  • an important aim of the invention is to devise a method and an apparatus for stretching in a single layer and collecting a knitted fabric produced in a tubular piece which allow to maintain substantially unaltered, relative to the traditional technique for collecting the fabric in double layer, the positioning of the circular knitting machine in terms of height.
  • Another important aim of the invention is to provide a method and an apparatus which allow a better and more delicate stretching in a single layer of a knitted fabric produced in tubular piece.
  • a further aim is to devise a method and an apparatus which favour the employment of loading and transporting trucks, also automated, for the removal of the fabric collected in a roll or in superposed layers.
  • Yet another aim of the invention is to make available an apparatus which is easily converted from the function of stretching width-wise, i.e. in a single layer, a tubular piece to the traditional function of applying traction without cutting and widening the tubular piece itself.
  • It comprises a support frame 2 positioned inferiorly to a known circular knitting machine 3 provided for producing, in correspondence with a cylinder 4, of knitted fabric in tubular piece 5.
  • the support frame is able to rotate integrally with the cylinder 4 about a vertical central axis 6 and is positioned internally to a fixed structure 7 which sustains both the frame 2 itself and the circular machine 3.
  • means 8 for the substantial flattening of the piece 5 coming from the cylinder 4.
  • the means 8 comprise a piece-widening frame 9, known in itself, able progressively to modify the cylindrical shape of the piece by substantially flattening it along a diametrical direction thereof and a pair of parallel piece-pressing roller 10 suitably distanced from each other and externally delimiting the piece.
  • cutting means 11 able progressively to cut the tubular piece 5 along a generatrix, and means 12 for opening and stretching the cut piece, able to widen it in a single layer 5a.
  • the opening and stretching means 12 comprise two rollers 13 for spreading the piece 5 and its lateral edges 5b obtained from the cutting and a roller 14 for transmitting the stretched piece.
  • the spreading rollers 13 are arranged according to diverging lines inclined downwards and developing starting from upper extremities 13a mutually approached and positioned in an area of the piece opposite said cut generatrix. More in detail the upper extremities 13a are positioned in opposition to the cutting means 11 and substantially level therewith, until reaching inferiorly, with lower extremities 13b, a first edge area 2a of the support frame 2 laterally displaced relative to the central vertical axis of the knitting machine.
  • the roller 14 for the transmission of the stretched piece 5a.
  • the spreading rollers 13 are hinged, in correspondence with their approached upper extremities 13a, to a first terminal portion 15a of a support body 15 integral to the support frame 2 and have the lower extremities 13b able to be fastened at an adjustable mutual distance to an arched base element 16 also integral with the frame 2.
  • the spreading rollers 13 can be mounted idle on the support roller 2, but preferably and advantageously are provided with independent motors 13c the further to favour the stretching of the piece in single layer.
  • the direction of rotation imposed by the motors to the rollers is preferably opposite the direction of advance of the piece to enhance the stretching effect on the piece.
  • the first terminal portion 15a of the support 15 extends externally with a rotating element 17 with curved profile able to guide the piece immediately below the parallel rollers 10 favouring its sliding in the critical area of increased tension opposite to the cut generatrix.
  • the rotating element 17 can be constituted by a wheel or a ball.
  • an oscillating arm with curved extremity, tensioned by a spring can be provided.
  • the cutting means 11 which, advantageously, comprise a rotating blade 18, a blade guide 19 and a motor 20 for supporting and controlling the blade, available in a position adjustable on the support body 15 itself to enable varying, according to operative requirements, the distance of the rotating blade 18 from the central axis 6. Also the position of the rotating element 17 can be adjusted, since it is mounted on a bar 17a able to be fastened by means of screws to corresponding slots obtained in the support body 15.
  • the set of driving rollers 21 comprises a central tensioning roller 21a and two lateral contrasting rollers 21b.
  • the set of driving rollers 21 is controlled by a motor 21c independently of the means for actuating the other rollers or of the means that serve other functions of the apparatus.
  • a set 22 Downstream from the driving rollers set 21, in correspondence with a second edge area 2b of the support frame 2 and laterally offset relative to the central axis 6, is positioned a set 22 for collecting the piece stretched in a single layer into a roll.
  • a known device can be provided, suitable for collecting the piece in superposed layers.
  • a first roller 23 for tensioning the piece in the transverse direction having two grooved portions helically wound in opposite directions able to contrast the tendency of the bands of the piece itself that are proximate to the lateral edges 5b to curl themselves longitudinally.
  • a piece-presser roller 23a positioned in the vicinity of the transverse tensioning roller 23 to increase the winding angle of the piece about the transverse tensioning roller with the consequent increase of the effectiveness of the action of the helically grooved portions on the edges of the piece.
  • the piece-presser rollers 23a and 24a can be adjusted both horizontally towards and away from the respective transverse tensioning rollers 23, and vertically to determine a greater or lesser winding of the piece about the transverse tensioning roller 23.
  • the transverse tensioning rollers 23 and 24 are equipped with motors 23b and 24b independent from the other functions of the machine to have speeds greater than that of the prior art, with the consequent improvement in the stretching of the edges of the piece which tend to become curled up.
  • the support frame 2 has a pair of horizontal cross members 27 oriented orthogonally to said driving rollers set 21 and provided with supplementary seats 28 (Fig. 2) for the extremities of the piece presser rollers 10.
  • the seats 28 allow a simple and rapid re-positioning of the piece-presser rollers 10 themselves to 90° when, alternatively to the cutting and the width-wise opening of the tubular fabric, its stretching and traditional collection in two superposed layers are required.
  • proximity sensors 29 or contact oscillators have been shown schematically, for arresting the apparatus if the operator should approach it excessively, or even come in contact with the rotating support frame 2.
  • the sensors 29 are positioned at least in correspondence with the edges of the rotating support frame.
  • the operation of an apparatus described above in a prevalently structural sense is as follows.
  • the tubular piece 5 coming from the cylinder 4 is gradually flattened by the piece-spreader frame 9, by the parallel piece-presser rollers 10 and by the blade guide 19.
  • the flattened tubular piece tensioned longitudinally by the driving roller set 21, is cut by the cutting means 11 along one of its generatrices whilst, in correspondence with the opposite generatrix, it slides on the rotating element 17 which prevents deflections and the formation of creases.
  • the cut piece is progressively widened and stretched by the spreading rollers 13, until it passes, completely open, on the transmission roller 14.
  • the single-layer fabric continues along a substantially horizontal path, moving from the first edge area 2a of the support frame 2, where the transmission roller 14 is located, to a second, opposite, edge area 2b where the set 22 for collecting in a roll or possibly in superposed layers.
  • the transverse tensioning rollers 23 and 24 maintain the knitted fabric perfectly flat, preventing it from curling in correspondence with the edges.
  • the invention implements a new method which also forms an integral part of the present patent.
  • This spreading operation is performed gradually according to downwards-inclined lines developing substantially from the height of the cutting area until reaching inferiorly a first position laterally offset relative to the central vertical axis of the knitting machine. In correspondence with this first position, the stretching of the piece spread in a single layer of fabric is completed.
  • the path of the piece continues substantially horizontally and reaches a second position laterally offset relative to the central axis, opposite to the first position itself.
  • the stretched piece is collected in a roll or in superposed layers.
  • the piece In the substantially horizontal segment of the path of the piece lying between said first and second position, the piece is subjected to traction for its controlled advance through all the operative phases illustrated downstream of the cylinder of the knitting machine.
  • the stretched piece is subjected to two tensioning operations in the transverse direction able to contrast the tendency of the edge bands to curl themselves.
  • the apparatus and the method obtain a path of the piece in the cutting and opening phases and subsequently of the stretched piece which exploits to the fullest extent the horizontal space underneath the cylinder of the knitting machine.
  • the vertical dimension of the apparatus is therefore limited and hence the height and accessibility of the overlying knitting machine are practically unchanged relative to the traditional technique without width-wise opening.
  • the ease of access to the cylinder working plane is determined by the fact that the driving, collecting and transverse tensioning rollers are situated on a single plane positioned at the base of the machine. This alignment of the rollers below leaves room in the high end of the machine and allows to incline the spreader rollers, thereby facilitating the operator's task when he or she needs to approach the operative organs of the circular machine.
  • the diameter of the ring 30 supporting the thread feeders 31 has also been increased, making it substantially equal to the dimensions of the base. In this way the feeders are moved away from the axis of the machine and closer to the operator.
  • the architecture of the machine allows to position laterally the set for collecting the stretched fabric in a roll or in superposed layers, thereby facilitating the positioning of a truck, which can also be automated, for the extraction and transport of the wound piece.
  • the length of the widening segment of the knit obtained from the original disposition of the spreader rollers and the cut with rotating blade allow to obtain a gradual and delicate opening of the knitted piece itself and to maintain a regular tensioning both in the phase of forming the knit and in the subsequent path towards the set for collecting in a roll.
  • the apparatus according to the invention has high operative flexibility as it allows easily and rapidly to shift - as need be - to traditional tensioning and collecting in a roll without cutting and widening the piece.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Knitting Of Fabric (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP00909622A 1999-02-23 2000-02-18 A method and apparatus for stretching and collecting a knitted fabric produced by circular knitting machines Expired - Lifetime EP1155176B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT1999BS000016A IT1309184B1 (it) 1999-02-23 1999-02-23 Procedimento ed apparecchiatura per distendere e raccogliere untessuto a maglia prodotto da macchine tessili circolari.
ITBS990016 1999-02-23
PCT/IT2000/000052 WO2000050678A1 (en) 1999-02-23 2000-02-18 A method and apparatus for stretching and collecting a knitted fabric produced by circular knitting machines

Publications (2)

Publication Number Publication Date
EP1155176A1 EP1155176A1 (en) 2001-11-21
EP1155176B1 true EP1155176B1 (en) 2005-05-04

Family

ID=11346292

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00909622A Expired - Lifetime EP1155176B1 (en) 1999-02-23 2000-02-18 A method and apparatus for stretching and collecting a knitted fabric produced by circular knitting machines

Country Status (11)

Country Link
EP (1) EP1155176B1 (es)
JP (1) JP2002538316A (es)
KR (1) KR100700225B1 (es)
CN (1) CN1189614C (es)
AT (1) ATE294885T1 (es)
AU (1) AU3190000A (es)
DE (1) DE60019899T2 (es)
ES (1) ES2241582T3 (es)
IT (1) IT1309184B1 (es)
PT (1) PT1155176E (es)
WO (1) WO2000050678A1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI689639B (zh) * 2015-05-20 2020-04-01 德商Sipra專利開發投資有限公司 布料捲繞裝置

Families Citing this family (26)

* Cited by examiner, † Cited by third party
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DE10120736C1 (de) 2001-04-25 2003-02-13 Sipra Patent Beteiligung Rundstrickmaschine
DE10123089C1 (de) 2001-05-09 2002-06-13 Sipra Patent Beteiligung Rundstrickmaschine
JP2007532793A (ja) * 2004-04-14 2007-11-15 サントニ エス．ピー．エー 丸編機で製造された編地を回収する方法及び丸編機
JP2006161196A (ja) * 2004-12-06 2006-06-22 Precision Fukuhara Works Ltd 開反巻取装置、それを有する丸編機の制御装置及びその制御方法
WO2006119717A1 (en) * 2005-05-11 2006-11-16 Amtek, Spol. S.R.O. Circular knitting machine with a device for knitwork wide drawing-off
ITBS20050140A1 (it) 2005-11-18 2007-05-19 Santoni & C Spa Dispositivo di tiraggio per macchine tessili circolari
DE602006014647D1 (de) * 2006-01-13 2010-07-15 Pai Lung Machinery Mill Co Ltd Stoffaufwickelvorrichtung
KR100893210B1 (ko) * 2007-07-03 2009-04-16 코오롱글로텍주식회사 변부 말림 방지 장치를 구비한 환편기
DE102007063339A1 (de) * 2007-12-20 2009-06-25 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Rundstrickmaschine mit einem drehbaren Schneidmesser zum Auftrennen eines Warenschlauchs
JP2011088709A (ja) * 2009-10-22 2011-05-06 Hakuryu Kikaisho Kofun Yugenkoshi ウエブ裁断装置の巻き取り機構
KR101130754B1 (ko) * 2010-06-25 2012-03-28 제일약품주식회사 난용성 트리사이클릭 유도체 화합물의 용해도가 향상된 약학적 조성물
ITBS20130078A1 (it) * 2013-05-28 2014-11-29 Santoni & C Spa Gruppo di tiraggio e/o raccolta del tessuto per macchine tessili circolari per maglieria di tipo ¿open¿
ITBS20130076A1 (it) 2013-05-28 2014-11-29 Santoni & C Spa Macchina tessile circolare per maglieria di tipo ¿open¿ con basamento a ingombro ridotto
ITBS20130077A1 (it) * 2013-05-28 2014-11-29 Santoni & C Spa Macchina tessile circolare per maglieria di tipo ¿open¿ con gruppo di tiraggio e/o raccolta del tessuto
ITBS20130079A1 (it) * 2013-05-28 2014-11-29 Santoni & C Spa Rullo stenditore per un gruppo di tiraggio e/o raccolta del tessuto per macchine tessili circolari di tipo ¿open"
KR101347952B1 (ko) * 2013-06-17 2014-01-09 백건용 비닐대체용 강화원단 및 그 제조 방법
ITBS20130138A1 (it) * 2013-10-02 2015-04-03 Santoni & C Spa Macchina tessile circolare
CN103572481B (zh) * 2013-11-25 2015-08-12 南通泰慕士服装有限公司 改善针织单面纬斜的方法
CN105088519A (zh) * 2015-09-10 2015-11-25 广东溢达纺织有限公司 针织系统及坯布加工方法
KR101969060B1 (ko) * 2018-02-13 2019-04-15 (주)유영산업 신발 갑피용 원단 제조방법
KR101952296B1 (ko) * 2018-02-13 2019-02-26 (주)유영산업 원단 개폭용 가이드장치
KR101969068B1 (ko) * 2018-02-13 2019-04-15 (주)유영산업 원단 개폭용 가이드장치
KR101952289B1 (ko) * 2018-02-13 2019-02-26 (주)유영산업 원단 개폭용 가이드장치
CN112623839A (zh) * 2020-12-24 2021-04-09 康美特(厦门)智控科技有限公司 一种用于针织大圆机组的开幅卷布机及其伺服控制方法
KR102668633B1 (ko) * 2022-02-03 2024-05-23 양진석 환편기용 편물의 오픈 겸용 권취장치
CN115573091B (zh) * 2022-11-07 2024-05-03 南通郝旺新材料科技有限公司 一种用于针织大圆机的扩布装置

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IT1252504B (it) * 1991-09-23 1995-06-19 Vignoni Srl Avvolgi-pezze per macchine circolari da maglieria
JPH0860501A (ja) * 1994-08-08 1996-03-05 Fukuhara Seiki Seisakusho:Kk 開反巻取装置及びそれを有する丸編機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI689639B (zh) * 2015-05-20 2020-04-01 德商Sipra專利開發投資有限公司 布料捲繞裝置

Also Published As

Publication number Publication date
KR20010101968A (ko) 2001-11-15
KR100700225B1 (ko) 2007-03-26
CN1189614C (zh) 2005-02-16
DE60019899T2 (de) 2006-04-27
DE60019899D1 (de) 2005-06-09
ES2241582T3 (es) 2005-11-01
JP2002538316A (ja) 2002-11-12
EP1155176A1 (en) 2001-11-21
CN1341172A (zh) 2002-03-20
AU3190000A (en) 2000-09-14
ATE294885T1 (de) 2005-05-15
IT1309184B1 (it) 2002-01-16
PT1155176E (pt) 2005-09-30
WO2000050678A1 (en) 2000-08-31
ITBS990016A1 (it) 2000-08-23

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