EP0063371A1 - Machine à tricoter pour la production de tricot à rayures transversales - Google Patents

Machine à tricoter pour la production de tricot à rayures transversales Download PDF

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Publication number
EP0063371A1
EP0063371A1 EP82103234A EP82103234A EP0063371A1 EP 0063371 A1 EP0063371 A1 EP 0063371A1 EP 82103234 A EP82103234 A EP 82103234A EP 82103234 A EP82103234 A EP 82103234A EP 0063371 A1 EP0063371 A1 EP 0063371A1
Authority
EP
European Patent Office
Prior art keywords
yarn
knitting machine
knitting
fed
machine
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.)
Granted
Application number
EP82103234A
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German (de)
English (en)
Other versions
EP0063371B1 (fr
Inventor
Kurt Arne Jacobsson
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.)
Iro AB
Original Assignee
Iro AB
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 Iro AB filed Critical Iro AB
Publication of EP0063371A1 publication Critical patent/EP0063371A1/fr
Application granted granted Critical
Publication of EP0063371B1 publication Critical patent/EP0063371B1/fr
Expired 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
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • D04B15/482—Thread-feeding devices comprising a rotatable or stationary intermediate storage drum from which the thread is axially and intermittently pulled off; Devices which can be switched between positive feed and intermittent feed
    • 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
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/54—Thread guides
    • D04B15/58—Thread guides for circular knitting machines; Thread-changing devices
    • D04B15/62—Thread guides for circular knitting machines; Thread-changing devices with thread knotters

Definitions

  • the invention relates to a method for feeding yarns of different colors from a respective yarn supply via a positive feed device and a yarn selection unit to a knitting machine for the production of striped goods.
  • positive yarn feeders are arranged between the respective yarn supply and the yarn selection unit.
  • the latter unit is directly associated with the knitting machine, so that it therefore has a number of yarn selection units corresponding to that of the knitting systems.
  • a separate positive feed device is required for each yarn, which gives the knitting machine and its feed devices an extremely complex structure.
  • a major difficulty is that extensive auxiliary devices are arranged in the immediate vicinity of each knitting system, making the installation, maintenance and adjustment of the machine considerably more difficult.
  • An object of the invention is to provide a method of the above-mentioned type which enables yarns of different colors to be fed to a conventional knitting machine so that striped goods can be produced with such a knitting machine which has a simple structure.
  • the method according to the invention thus enables the production of striped goods on a conventional knitting machine using relatively simple auxiliary devices which can be arranged at a certain distance above or outside the knitting machine itself.
  • the feeding device is considerably simpler than in known designs since each knitting system only has to be fed a single, continuous yarn.
  • the control of the lengths of the continuous yarns running into the individual knitting systems preferably begins at the binding station.
  • the connection points between the yarn sections which are usually designed as knots, can be arranged, for example, in the area along which the goods are subsequently cut open, so that their appearance is not impaired is.
  • the invention further relates to a knitting machine for the production of striped goods from different colored yarns, each of which is kept in a supply, selected by means of a selection unit and fed to the knitting systems of the machine by means of a positive feed device.
  • the knitting machine is a conventional knitting machine without dial units directly assigned to the individual knitting systems, that a yarn selection unit controlled synchronously with the working cycle of the machine and depending on the strip pattern to be produced is separated from the is arranged that each yarn selection unit is associated with a yarn splicing, holding and cutting device, that a yarn intermediate storage device is arranged on the outlet side of the splice holding and cutting device and that a positive feed device is arranged on the outlet side of the intermediate storage device.
  • the intermediate yarn storage device preferably has a stationary drum and a winding element connected to a drive. In this way, the additional twist of the continuous yarn can be kept to a minimum. However, it is also possible to use a rotating buffer drum.
  • the positive yarn feeder is preferably a tape feeder.
  • a tape feeder can pass through all of them feed outgoing skeins of the machine together and has a simple and robust construction.
  • Another object of the invention is to provide a simple yet effective control for feeding the continuous strands of yarn to the knitting systems in such a way that the desired stripe pattern is accurately reproduced.
  • the invention uses a control arrangement with a pattern unit controlling the selection unit and an auxiliary control unit controlling the splicing, holding and cutting device as well as the drive of the winding element, which sensor determines the length of yarn used by the machine and the length of yarn fed to the intermediate storage device is fed with information corresponding to the respective yarn length.
  • the auxiliary control unit always contains information regarding the yarn length present in the intermediate storage device and running from it to the respective knitting system and the auxiliary control unit controls the splicing, holding and cutting device, the lengths of the differently colored yarn sections can be determined and controlled extremely precisely so that a regular stripe pattern is created.
  • the auxiliary control unit preferably controls the splicing, holding and cutting device and the drive of the winding element in such a way that the drive is stopped during the splicing process.
  • the joining of the yarn sections by the splicing device is thereby made considerably easier.
  • the auxiliary control unit is composed of a third sensor which scans the working position of the machine and corresponds to the working position of the machine formations fed.
  • This additional information enables the control arrangement to continuously correct the joining of the yarn sections and the length measurement of the yarn, so that the splices or knots always lie in the intended area of the goods and irregularities in the drive of the knitting machine are compensated.
  • FIG. 1 schematically show an embodiment and FIGS. 2 to 8 show a detail from FIG.
  • a conventional knitting machine 1 shown schematically in FIG. 1 has a rotating needle cylinder 1a, along the circumference of which needles 2 are guided in grooves in a longitudinally displaceable manner.
  • a knitting system 3 guides the yarn to be knitted into a position in which it can be gripped by the needles 2.
  • Several knitting systems 3 are arranged in a fixed manner along the circumference of the needle cylinder 1a.
  • the needle cylinder 1a has a peripheral section 1b that is not equipped with needles.
  • the knitting machine 1 is otherwise of conventional design and therefore need not be described in detail. In contrast to a conventional knitting machine, the knitting machine 1 shown is intended for the production of striped goods S.
  • the goods S have successive strips A - D of different colors in a predetermined sequence.
  • yarns of the corresponding colors a to d are present in the form of packs or bobbins 4, which in a conventional manner on a support ring of the knitting machine or a separate bobbin frame are arranged.
  • a yarn selection unit 5 is provided, such as is directly assigned to each individual knitting system in a known knitting machine for the production of horizontally striped goods.
  • the selection unit 5 selects one of, for example, four differently colored yarns ad in the same way as is done in a conventional knitting machine for striped goods immediately before the respective knitting system.
  • a splicing, holding and cutting device 6 directly adjoins the selection unit 5.
  • This can be a conventional splicing or knotting device, which attaches a thread running in from the selection unit 5 to a running, endless thread strand 7 and cuts off the thread previously attached to the strand 7 and holds the cut end.
  • a fixed intermediate storage drum 8 is arranged on the outlet side of the device 6.
  • the endless yarn strand 7 is driven by a drive 10, e.g. an electric motor, connected winding element 9 wound on the drum 8.
  • a drive 10 e.g. an electric motor
  • Such buffers for the intermittent feeding of yarn to a knitting machine or a loom are generally known.
  • a positive feed device 11 pulls the yarn strand 7 from the storage drum 8 and feeds it to the knitting system 3 of the knitting machine 1.
  • the feed device 11 is a belt feeder, in which the yarn is clamped between a driven belt 11a and rotatable pinch rollers 11b.
  • Such tape feeders for positive yarn feed to a knitting machine are generally known.
  • a control arrangement that controls the entire workflow has a sample unit 12 and a secondary or auxiliary unit control unit 13.
  • the pattern unit is fed with the output signals of a first sensor 14 assigned to the winding element 9, a second sensor 15 assigned to the positive feed device 11 and a third sensor 16 assigned to the needle cylinder 1a of the knitting machine 1.
  • the secondary or auxiliary control unit 13 determines the exact point in time at which the respectively selected yarn a, b, c or d is added to the running yarn strand 7 by the device 6.
  • the corresponding control signal is indicated by an arrow A2.
  • the auxiliary control unit 13 feeds the drive 10 of the winding element 9 with a signal, indicated by an arrow A3, for switching off the drive, so that the splicing or knotting can take place while the yarn strand 7 is not moving in the device 6.
  • the signal A3 leads the signal A2 slightly, since a certain period of time passes until the drive 10 comes to a standstill.
  • the drive 10 is preferably a stepping motor, which can be stopped in a precisely determined angular position and accelerates quickly.
  • the auxiliary control unit 13 is fed by the pattern unit 12 with pattern information indicated by an arrow A4.
  • the pattern unit 12 thus determines the approximate and the auxiliary control unit 13 the exact time at which a color change takes place.
  • An essential task of the auxiliary control unit 13 is to precisely determine the length of the differently colored yarn sections of the yarn strand 7, so that the stripe pattern of the product S is exactly maintained.
  • the sensor 14 feeds the auxiliary control unit 13, as indicated by an arrow A5, with the information corresponding to the exact position of the winding element 9. This can be done in such a way that the sensor 14 generates pulses corresponding to the revolutions of the winding element 9.
  • the auxiliary control unit 13, as indicated by an arrow A6, is fed by the sensor 15 with information corresponding to the drive speed of the belt 11a.
  • the sensor 15 can be an optical sensor which responds to optical signals from reflectors arranged on the belt 11a or the rollers 11b.
  • the information transmitted to the unit 13 by the signals A5 corresponds to the length of the yarn wound on the storage drum 8.
  • the information transmitted by the sensor 15 in the form of the signals A6 corresponds to the length of the yarn drawn off from the storage drum 8 by the positive feed device 11.
  • the length of the yarn between the splice in the device 6 and the winding element 9 is constant. Since the auxiliary control unit 13 generates the splice signal A2, it always contains information regarding the length of the yarn present between the splice point and the knitting machine. As a result, the auxiliary control unit 13 can output the splice signal A2 at a time which corresponds to the exact length of the yarn of a specific color required for the pattern to be produced.
  • the auxiliary control unit 13 continuously controls the speed of the drive 10 via the signal A3 in order to adapt it to the yarn consumption determined by the sensor 15. In this way, the intermediate yarn supply on the drum 8 can be kept within a narrow range and speed changes of the take-up drive can be kept to a minimum.
  • the control arrangement described makes it possible to set the splices or knots of the endless yarn strand 7 such that they always come to rest in the section 1b of the needle cylinder which is not equipped with needles.
  • the finished product is then cut open along the area that spans this section, so that the splices or knots lie in an uncritical area of the product.
  • the sensor 16 which can also be an optical sensor and can interact with reflectors on the needle cylinder 1a, feeds the auxiliary control unit 13 with the exact position of the needle cylinder 1a corresponding information that can be used as a correction factor. In this way, errors caused by irregularities in the drive of the knitting machine, e.g. prevent the nodes from moving into areas not intended for this purpose.
  • the arrangement described thus enables the production of high-quality striped goods with a precisely defined strip pattern on an ordinary knitting machine.
  • the width of the strips can be varied by changing the speed of the positive feed device 11 without any further intervention.
  • the various units and devices 5, 6, 10, 9, 8 and 11 can be arranged at a certain distance above or outside the knitting machine 1, so that the entire arrangement is easily accessible for maintenance and repair purposes.
  • FIG. 2 to 8 show the structure and the work in the binding station 6 schematically indicated in FIG. 1, which contains a yarn splicing, holding and cutting device.
  • Fig. 2 four identical yarn clamping and cutting devices 20a, 20b, 20c and 20d can be seen, which are optionally mounted on stationary plates 21a, 21b, 21c and 21d so as to be displaceable and pivotable.
  • These devices - as will be explained in detail below - can be controlled in such a way that they feed the respective yarns a, b, c and d which run from the yarn packages 4a, 4b, 4c and 4d into a knot or splicing station 22 ' Move the knot or splicer 22 of known type into it.
  • the splicing device can, for example, carry out the splicing process in an electrostatic manner.
  • the respective yarn clamping and cutting device 20, in this case 20b, is displaceable and pivotable in a groove 21 'of a stationary plate 21 against the force of a spring 23.
  • a head 20 'of the yarn clamping and cutting device 20 has a central plate 24 with a longitudinal groove 24' (see FIG. 2). Further plates 25 and 26 are connected on both sides of the middle plate 24 via a bolt connection 27 through the groove 24 '.
  • One plate 25 forms a cutting blade for the yarn.
  • Stop surfaces 25 'and 26' are arranged on the two plates 25 and 26.
  • a curved yarn clamping blade 28 is fastened to the plates 25 and 26 via a bolt connection 27.
  • the yarn clamping and cutting device 20 can be pivoted after excitation of a linear magnet 31, which acts on a surface 20 "of the device 20.
  • a control plate 32 is also pivoted, which the device 20 by cooperation of a first Control pin 33 pivoted and displaced on the plate 32 and a control groove 34 of the device 20, a relative movement also taking place between a second control pin 35 on the plate 32 and a control surface 36 on the device 20.
  • the function of the yarn clamping and cutting device 20 is described below, provided that a length section of a yarn b is selected and connected to an already running yarn a to a continuous yarn strand, the yarn strand then is fed to the knitting machine.
  • FIG. 3 it can be seen how the yarn a runs from the yarn spool 4a between stationary yarn eyelets 37 and 38, which approximately limit the knotting or splicing station 22 'of the device 22.
  • the pattern unit 12 (FIG. 1) delivers an exciting pulse to the linear electromagnet 31, so that its plunger 31 ′ presses on the control surface 20 ′′, as shown in FIG. 4.
  • the device 20b moves in FIG 4 to the left so that the control groove 34 comes into contact with the first control pin 33.
  • the rotary magnet receives an exciting pulse from the second control unit 13 (Fig. 1), whereby the control plate 32 counterclockwise is twisted (FIG.
  • the second control unit 13 emits a stopping pulse to the drive 10 so that the winding of the yarn a is interrupted and the yarn a is stopped for a brief moment within the knotting or splicing device 22.
  • the second control unit 13 sends a start impulse to the device 22, whereupon the now standing yarns a and b are knotted or spliced to one another, specifically in the area 22 '.
  • the device 20b is moved further downward, specifically by the second control pin 35, which presses on the control surface 36 according to FIG. 7b.
  • the first holding stop 29 now acts on the holding surface 25 ', the middle plate 24 is displaced relative to the clamping blade 28, so that the end of the yarn b clamped up to that point is released.
  • the yarn clamping and cutting device 20a for the yarn a is in the position according to FIG. 7a. It is now shifted upwards by the control edge 39, which engages in the control groove 34. Now that the second stop 30 acts on the stop surface 26, the middle plate 24 is displaced relative to the cutting blade 25 and the clamping blade 28, so that the yarn a is cut off in the direction of the knot or splice point, while the end of the yarn a that is in the opposite direction is clamped. This means that yarn a has once again reached a position comparable to that of yarn b in FIG. 3, in which it is ready for a new selection.
  • the final step in the yarn selection and splicing operation is that after energizing the rotating magnet, but then in a clockwise direction, the device 20b through the first control pin 33, which engages in the control groove 34, and with the force of the spring 23 is moved back into the position shown in Fig. 8.
  • the yarn b which is now continuously moved, is moved into the groove 24" which enables the device 20b to then cut the yarn b and hold it when another yarn , e.g. Yarn c or yarn d will need to be joined to yarn b currently being moved continuously.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP82103234A 1981-04-16 1982-04-16 Machine à tricoter pour la production de tricot à rayures transversales Expired EP0063371B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8102464 1981-04-16
SE8102464 1981-04-16

Publications (2)

Publication Number Publication Date
EP0063371A1 true EP0063371A1 (fr) 1982-10-27
EP0063371B1 EP0063371B1 (fr) 1985-07-24

Family

ID=20343618

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82103234A Expired EP0063371B1 (fr) 1981-04-16 1982-04-16 Machine à tricoter pour la production de tricot à rayures transversales

Country Status (6)

Country Link
US (1) US4531385A (fr)
EP (1) EP0063371B1 (fr)
JP (1) JPS58500530A (fr)
DD (1) DD202191A5 (fr)
DE (1) DE3264870D1 (fr)
WO (1) WO1982003642A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3731379A1 (de) * 1987-09-18 1989-04-06 Sipra Patent Beteiligung Strickmaschine mit fadenwechseleinrichtung
DE3904807A1 (de) * 1988-02-26 1989-09-07 Sipra Patent Beteiligung Vorrichtung zur lieferung eines fadens an eine textilmaschine
DE3915583A1 (de) * 1988-05-24 1989-12-07 Sipra Patent Beteiligung Vorrichtung zur lieferung eines fadens an eine textilmaschine
US4984436A (en) * 1987-10-07 1991-01-15 Sipra Patententwicklungs-Und Beteiligungsgesellschfat Mbh Thread exchange device, particularly for knitting machines
EP0643005A1 (fr) * 1993-09-09 1995-03-15 Melco Industries Inc. Changement de fil dans une machine à coudre
EP0644148A1 (fr) * 1993-09-16 1995-03-22 SAXONIA UMFORMTECHNIK GmbH Machine transformant du fil comportant un dispositif de changement du fil
EP0811714A4 (fr) * 1995-12-26 1998-03-11 Murata Machinery Ltd Systeme de traitement de fil
EP2385161A1 (fr) * 2010-05-03 2011-11-09 SIPRA Patententwicklungs- und Beteiligungsgesellschaft mbH Doigt à fils pour un dispositif de changement de fil

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4466088A (en) * 1981-12-21 1984-08-14 Burroughs Corporation Galvo position sensor for track selection in optical data disk system
GB2208660B (en) * 1987-08-15 1992-04-08 Sipra Patent Beteiligung Circular weft knitting machine
JP2816784B2 (ja) * 1992-06-17 1998-10-27 株式会社島精機製作所 横編機の糸加工位置制御方法および装置
US5501250A (en) * 1994-11-22 1996-03-26 E. I. Du Pont De Nemours And Company Method for deleting and reintroducing yarns to a textile process
DE19525434C2 (de) * 1995-07-12 1999-04-01 Saxonia Umformtechnik Gmbh Faden-bzw. Garnklemmung
JP2004156184A (ja) * 2002-11-08 2004-06-03 Murata Mach Ltd 編機
US9487887B1 (en) 2013-03-13 2016-11-08 Jonathan Grossman Systems and methods for manufacturing textiles
EP3822207B1 (fr) * 2019-11-12 2023-11-08 Karl Mayer Rotal Srl Agencement de nouage de cordes
CN114016204B (zh) * 2021-11-22 2022-07-22 江南大学 一种横编结头全自动处理连续编织工艺方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2174600A5 (fr) * 1972-02-28 1973-10-12 Mecmor Spa
FR2380211A1 (fr) * 1977-02-11 1978-09-08 Camber Int Uk Ltd Mecanisme de changement de fil pour machine textile
DE3015191A1 (de) * 1980-04-19 1981-11-05 Schaffhauser Strickmaschinenfabrik, Schaffhausen Fadenwechselvorrichtung fuer textilmaschinen, insbesondere rundstrick- und rundwirkmaschinen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1726396A (en) * 1926-03-10 1929-08-27 Fidelity Machine Co Thread-knotting mechanism for knitting machines
US2232616A (en) * 1940-07-31 1941-02-18 Fidelity Machine Co Yarn changer
GB1191486A (en) * 1967-07-07 1970-05-13 Fouquet Werk Frauz & Planck Pneumatically Controlled Self-adjusting Thread Delivery Means for Circular Knitting Machines
GB1584259A (en) * 1976-08-16 1981-02-11 Iro Ab Methods and apparatus for knitting machine control systems
JPS5349150A (en) * 1976-10-09 1978-05-04 Toray Industries Continuous supplying of filament
SE408890B (sv) * 1977-11-14 1979-07-16 Aros Electronics Ab Sett och apparat for styrning av en tradmatningsanordning

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2174600A5 (fr) * 1972-02-28 1973-10-12 Mecmor Spa
FR2380211A1 (fr) * 1977-02-11 1978-09-08 Camber Int Uk Ltd Mecanisme de changement de fil pour machine textile
DE3015191A1 (de) * 1980-04-19 1981-11-05 Schaffhauser Strickmaschinenfabrik, Schaffhausen Fadenwechselvorrichtung fuer textilmaschinen, insbesondere rundstrick- und rundwirkmaschinen

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3731379A1 (de) * 1987-09-18 1989-04-06 Sipra Patent Beteiligung Strickmaschine mit fadenwechseleinrichtung
US4984436A (en) * 1987-10-07 1991-01-15 Sipra Patententwicklungs-Und Beteiligungsgesellschfat Mbh Thread exchange device, particularly for knitting machines
DE3904807A1 (de) * 1988-02-26 1989-09-07 Sipra Patent Beteiligung Vorrichtung zur lieferung eines fadens an eine textilmaschine
DE3904807C2 (de) * 1988-02-26 1999-11-18 Sipra Patent Beteiligung Vorrichtung zur Lieferung eines Fadens an eine Textilmaschine
DE3915583A1 (de) * 1988-05-24 1989-12-07 Sipra Patent Beteiligung Vorrichtung zur lieferung eines fadens an eine textilmaschine
CH675736A5 (fr) * 1988-05-24 1990-10-31 Sipra Patent Beteiligung
EP0643005A1 (fr) * 1993-09-09 1995-03-15 Melco Industries Inc. Changement de fil dans une machine à coudre
EP0644148A1 (fr) * 1993-09-16 1995-03-22 SAXONIA UMFORMTECHNIK GmbH Machine transformant du fil comportant un dispositif de changement du fil
EP0811714A4 (fr) * 1995-12-26 1998-03-11 Murata Machinery Ltd Systeme de traitement de fil
EP2385161A1 (fr) * 2010-05-03 2011-11-09 SIPRA Patententwicklungs- und Beteiligungsgesellschaft mbH Doigt à fils pour un dispositif de changement de fil

Also Published As

Publication number Publication date
JPH0214455B2 (fr) 1990-04-09
WO1982003642A1 (fr) 1982-10-28
DD202191A5 (de) 1983-08-31
DE3264870D1 (en) 1985-08-29
EP0063371B1 (fr) 1985-07-24
US4531385A (en) 1985-07-30
JPS58500530A (ja) 1983-04-07

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