EP0056619A2 - Fadenführersteuerungsvorrichtung für eine Rundstrickmaschine, insbesondere ein Einzylinderstrumpfautomat - Google Patents

Fadenführersteuerungsvorrichtung für eine Rundstrickmaschine, insbesondere ein Einzylinderstrumpfautomat Download PDF

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Publication number
EP0056619A2
EP0056619A2 EP82100222A EP82100222A EP0056619A2 EP 0056619 A2 EP0056619 A2 EP 0056619A2 EP 82100222 A EP82100222 A EP 82100222A EP 82100222 A EP82100222 A EP 82100222A EP 0056619 A2 EP0056619 A2 EP 0056619A2
Authority
EP
European Patent Office
Prior art keywords
yarn feeding
machine
drum
knitting machine
feeding fingers
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.)
Withdrawn
Application number
EP82100222A
Other languages
English (en)
French (fr)
Other versions
EP0056619A3 (de
Inventor
Francesco 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.)
Lonati SpA
Original Assignee
Lonati SpA
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 Lonati SpA filed Critical Lonati SpA
Publication of EP0056619A2 publication Critical patent/EP0056619A2/de
Publication of EP0056619A3 publication Critical patent/EP0056619A3/de
Withdrawn legal-status Critical Current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
    • D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements
    • D04B15/80—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the thread guides used
    • 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

Definitions

  • This invention relates to a yarn feeding finger control device for a circular knitting machine, in particular a single cylinder hose knitting machine, comprising a plurality for yarn feeding fingers individually pivoted to a stationary structure of the machine and selectively movable between a rest position, whereat one yarn feeding end thereof is moved away from the needles and the respective yarn is not picked up by the latter, and an operative position, whereat said end is moved close to the . needles and the latter pick up the yarn, the selective movement being accomplished through program controlled means.
  • the means for selectively actuating the yarn feeding fingers comprise in general a plurality of cams arranged circumferentially around a machine drum in accordance with the yarn feeding fingers program for operation, and a system of levers and tie rods arranged between the cams and respective yarn feeding fingers.
  • a device of this kind requires, therefore, as many cams along the drum periphery as are the yarn feeding fingers. Assuming a machine with plural feeds, there are to be found as many groups of cam rows as are the feeds, thus resulting in a drum of considerable bulk. Moreover, the linkage system is also bulky as well as being complex, since each set of levers and tie rods associated with a yarn feeding finger must be indipendent of the others.
  • a primary object of this invention is to provide a drive device of the type indicated in the preamble, which is significantly less bulky than conventional ones, requires virtually no space around the periphery of the machine main drum, or any other drums thereof, and can bring about less advancement movements of the drum on behalf of other' machine controls.
  • Another object of the invention is to provide a device of the type mentioned in the preamble, which can even be controlled, instead by the machine drum, by some other programming means.
  • a yarn feeding finger control device for a circular knitting machine of the type mentioned in the preamble characterized in that with the yarn feeding fingers there are associated respective electromagnets for moving said yarn feeding fingers, and that a means is provided for detecting the movement of a mechanical programming member of the machine, as well as a memory device electrically connected to said detecting means and driven thereby to selectively energize and de-energize individual electromagnets in accordance with the advancing movement of ' said mechanical programming member of the machine.
  • the mechanical programming member may be the machine main drum
  • the detecting means may comprise a photoelectric unit adapted for sending electric pulses to the memory device at each advance step of the drum, the memory device controlling, selectively and sequentially, the energization and de-energization of the individual electromagnets and, accordingly, the intervention and withdrawal of the various yarn feeding fingers in accordance with the pulse sequence from the photoelectric unit.
  • the machine main drum (or other equivalent drum) no longer requires, to drive the yarn feeding fingers, any cams along its periphery and can thus be made smaller in size or utilized to drive other machine members, thus extending the knitting capabilities of the machine. It will be sufficient, for example, to provide a disk rigid with the drum and having a peripheral arrangement of plural notches for each advancing movement of the drum during a full revolution, the notch succession supplying, during the drum advancing movement and through a pair of photo-elements in the photoelectric unit, electric pulses for driving the memory.
  • the knitting program there is stored the knitting program, and the driving of the memory by the detecting means causes each given pulse, from a setting or reference position or upon completion of ascertain number of pulses starting from that position, to produce an energization or de-energization control impulse for a given electromagnet, thus controlling to knit or withdrawing from knitting the respective yarn feeding finger.
  • the driving of the memory by the detecting means causes each given pulse, from a setting or reference position or upon completion of ascertain number of pulses starting from that position, to produce an energization or de-energization control impulse for a given electromagnet, thus controlling to knit or withdrawing from knitting the respective yarn feeding finger.
  • a feeding group 1 of a circular knitting machine in particular a single cylinder hose knitting machine, comprises a plurality of yarn feeding fingers 2 individually pivoted at 3 to a structure 4, in turn secured to the stationary portion of the machine (not shown).
  • the yarn feeding fingers 2 are each provided, in a manner known per se, with a work end 2a, formed with guiding means in the form of holes or small tubes 5 for a respective yarn 6, the end 2a being movable between a rest position ( Figure 4), whereat the end 2a is moved away from the needles 7 and the related yarn 6 is not picked up by them, and an operative position (Figure3) whereat said end 2a is moved closer to the needles 7 and the latter pick up the yarn 6.
  • the reference numeral 8 designates a yarn guiding plate having holes 9 ' therein for the individual yarns 6 which are supplied from bobbins or reels, not shown.
  • control ends 2b of the feeding fingers are urged by respective springs 10 (for clarity reasons, only one of them has been represented in Figure 1) stretched between the ends 2b and stationary structure'4 such as to hold the yarn feeding fingers 2 normally in their rest positions.
  • the ends 2b of the yarn feeding fingers which are located on either sides of the middle or center feeding finger are bent outwardly to extend in different planes from the movement planes of the respective yarn feeding fingers 2. This in order to permit electromagnets 11 to be arranged at these ends, in particular below them, as shown in Figure 1.
  • the electromagnets 11 are staggered in several rows, e.g. with two of them further outboard and three further inboard along the radial direction of the machine.
  • a disk 17 rotatively rigid with the drum 14 on one side thereof and provided peripherally with a plurality of notches 18, and a photoelectric unit 19, secured to straddle the disk 17 to a holder 20, are provided.
  • the notches 18 are preferably equispaced and in a multiple number of the advancing steps of the drum, e.g. five notches per advancing step of the drum.
  • the photoelectric unit 19 which comprises a photoemitter element and photoreceiver one, of a type known per se, is, mounted stationary with respect to the disk 17, and is connected to the memory device 15 through the cited leads 16.
  • the pulses are passed to the memory device 15 through a peripheral interface adapter 21, of a type known per se.
  • the memory device 15 contains a knitting program in accordance wherewith, to the sequence of pulses from the detecting means 13 starting with the zero or setting time and up to the time when knitting commences on the machine, there correspond a sequence of selective energization and de-energization impulses to the electromagnets 11.
  • the device 15 essentially comprises a microprocessor 22, a pair of random access memories (RAM) 23,24, a read-only memory (ROM) 25, and some peripheral interface adapters 26,27,28, in addition to the cited adapter 21. Also provided is a keyboard 29 for program writing, which is connected to the group through the adapter 26, while a display unit 30, connected to the group through the adapter 27, enables the machine rpm to be displayed visually.
  • the group control output is represented by the adapter 28, which controls a number of amplifiers 31, whereto the electromagnets 11 are connected respectively through the leads 32.
  • the group of elements just described is fed through a power supply 33 or battery 34, the microprocessor 22 being driven by a crystal oscillator 35.
  • the device components are respectively connected through the connections 36 and 37, the former being the data bus and the latter the address bus.
  • the microprocessor 22 will process and check the data from the machine, as well as those set on the keyboard 29, in accordance with the machine knitting program, and compare them upon occurrence to those in the various storage devices. More specifically, the read-only memory 25 contains the basic program, which is each time adapted to suit specific knitting requirements by means of the random access memories 23,24. Thus, the device is made extremely versatile and suitable for a high number of knitting programs.
  • the device will be set for knitting by writing on the keyboard 29 the knitting program, in the sense that each advance movement of the drum 14, in turn related to the progressive number of revolutions of the machine and accordingly to each pulse or series of pulses from the detecting means 13, is made to correspond to a state of energization or de-energization of each electromagnet 11 in accordance with the knitting program. Thereafter, the yarn feeding fingers 2 are automatically selected in accordance with the knitting instant. In other words, each time that a pulse is supplied by the detecting means 13, the memory device 15 will hold or change the state of one or more electromagnets 11 in accordance with the preset program. It should be noted that with the drum 14 at a standstill, the controls to the electromagnets are maintained.
  • the fine distribution of the notches 18 affords the possibility of providing several controls within a single advancing step of the drum in very quick succession.
  • one is enabled to select with a high accuracy the time instant of insertion to knit of a yarn feeding finger 2 and time instant of withdrawal from knitting of another yarn feeding finger 2.
  • the operation of the memory device 15 affords high simultaneous control number capabilities with even a single pulse, whereas conventional machines would require, for the same purpose, the provision of a high number of separate mechanical elements on the drum.
  • the inventive device can bring about a considerable reduction in the drum bulk.
  • this device requires no space availability around the drum periphery, and the electronics can be easily enclosed in a case or box of small dimensions, which can be mounted at any convenient location on the machine.
  • the mechanical programming member which cooperates with the detecting means may be other than the machine main drum, and be, for example, the machine main chain.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP82100222A 1981-01-20 1982-01-14 Fadenführersteuerungsvorrichtung für eine Rundstrickmaschine, insbesondere ein Einzylinderstrumpfautomat Withdrawn EP0056619A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2052681U IT8120526V0 (it) 1981-01-20 1981-01-20 Dispositivo di comando de guidafili in una macchina circolare per maglieria, in particolare una macchina monocilindrica per calze.
IT2052681U 1981-01-20

Publications (2)

Publication Number Publication Date
EP0056619A2 true EP0056619A2 (de) 1982-07-28
EP0056619A3 EP0056619A3 (de) 1982-08-11

Family

ID=11168264

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82100222A Withdrawn EP0056619A3 (de) 1981-01-20 1982-01-14 Fadenführersteuerungsvorrichtung für eine Rundstrickmaschine, insbesondere ein Einzylinderstrumpfautomat

Country Status (3)

Country Link
EP (1) EP0056619A3 (de)
JP (1) JPS57133594U (de)
IT (1) IT8120526V0 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4841748A (en) * 1983-12-19 1989-06-27 Watanabe Kutsushita Kogyo Co., Ltd. Jacquard circular knitting machine
ITMI20101116A1 (it) * 2010-06-18 2011-12-19 Jim Chih-Neng Chao Metodo per la produzione di maglieria multicolore.
CN107151858A (zh) * 2017-05-08 2017-09-12 浙江诸暨钇澎机械有限公司 袜机主梭控制装置
IT201700057890A1 (it) * 2017-05-29 2018-11-29 Lonati Spa Dispositivo di alimentazione del filo o dei fili per maglieria o per calzetteria.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232079A (en) * 1962-12-24 1966-02-01 Southern Mill Equipment Corp Circular knitting machine
US3274802A (en) * 1963-10-16 1966-09-27 Morat Gmbh Franz Thread selector apparatus
FR2198497A5 (de) * 1972-08-12 1974-03-29 Billi Spa
GB2051890A (en) * 1979-06-27 1981-01-21 Elitex Zavody Textilniho Controlling Yarn Guides in Circular Knitting Machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232079A (en) * 1962-12-24 1966-02-01 Southern Mill Equipment Corp Circular knitting machine
US3274802A (en) * 1963-10-16 1966-09-27 Morat Gmbh Franz Thread selector apparatus
FR2198497A5 (de) * 1972-08-12 1974-03-29 Billi Spa
GB2051890A (en) * 1979-06-27 1981-01-21 Elitex Zavody Textilniho Controlling Yarn Guides in Circular Knitting Machines

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4841748A (en) * 1983-12-19 1989-06-27 Watanabe Kutsushita Kogyo Co., Ltd. Jacquard circular knitting machine
ITMI20101116A1 (it) * 2010-06-18 2011-12-19 Jim Chih-Neng Chao Metodo per la produzione di maglieria multicolore.
CN107151858A (zh) * 2017-05-08 2017-09-12 浙江诸暨钇澎机械有限公司 袜机主梭控制装置
IT201700057890A1 (it) * 2017-05-29 2018-11-29 Lonati Spa Dispositivo di alimentazione del filo o dei fili per maglieria o per calzetteria.
WO2018219806A1 (en) * 2017-05-29 2018-12-06 Lonati S.P.A. Device for feeding yarn or yarns for knitting machines for hosiery or the like
EA038412B1 (ru) * 2017-05-29 2021-08-25 ЛОНАТИ С.п.А. Устройство нитеподачи для вязальных машин для трикотажа
US11939710B2 (en) 2017-05-29 2024-03-26 Lonati S.P.A. Device for feeding yarn or yarns for knitting machines for hosiery or the like

Also Published As

Publication number Publication date
IT8120526V0 (it) 1981-01-20
JPS57133594U (de) 1982-08-20
EP0056619A3 (de) 1982-08-11

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Inventor name: LONATI, FRANCESCO