EP0385988A1 - Systeme de controle pour metiers rectilignes. - Google Patents

Systeme de controle pour metiers rectilignes.

Info

Publication number
EP0385988A1
EP0385988A1 EP88903974A EP88903974A EP0385988A1 EP 0385988 A1 EP0385988 A1 EP 0385988A1 EP 88903974 A EP88903974 A EP 88903974A EP 88903974 A EP88903974 A EP 88903974A EP 0385988 A1 EP0385988 A1 EP 0385988A1
Authority
EP
European Patent Office
Prior art keywords
machine
yarn
guards
control unit
during
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
EP88903974A
Other languages
German (de)
English (en)
Other versions
EP0385988B1 (fr
Inventor
Kurt Arne Gunnar 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.)
International Trading Srl
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
Priority to AT88903974T priority Critical patent/ATE95580T1/de
Publication of EP0385988A1 publication Critical patent/EP0385988A1/fr
Application granted granted Critical
Publication of EP0385988B1 publication Critical patent/EP0385988B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • D04B35/10—Indicating, warning, or safety devices, e.g. stop motions
    • D04B35/12—Indicating, warning, or safety devices, e.g. stop motions responsive to thread consumption
    • 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
    • D04B15/94—Driving-gear not otherwise provided for
    • D04B15/99—Driving-gear not otherwise provided for electrically controlled

Definitions

  • the present invention relates to a monitoring system for knitting machines, in particular for such machines as are intended for the knitting of hosiery or socks, comprising a number of yarn or thread guards associated with. each yarn intended for infeed into the machine, the guards each being operative, in response to a movement or absence of movement of the yarn, respetively, detected thereby, to generate an output signal to stop the machine in the event of, for example, yarn or thread breakage or other fault in the yarn infeed, by the intermediary of a preferably electronic cont ⁇ rol unit connected to the yarn guards.
  • one or more yarns are knitted in parallel in one or more systems and with variable speeds, according to the design and form of the sock.
  • reinforcements or replacement of yarn type may occur in the gusset rib, heel and toe por ⁇ tions of the sock.
  • the machines are equipped with a program mechanism, of mechanical, pneumatic or elect ⁇ romechanical type, for controlling yarn carriers with scis ⁇ sors etc.
  • the machines are also equip ⁇ ped with a suction system.
  • control unit includes memory and comparison means and is, in such instance, arranged to gather and memo ⁇ rise, during an introductory, correct and approved working or report cycle of the machine, information representing the yarn infeed phase in the form of the actual pattern of out ⁇ put signals from said yarn guards, and is further arranged thereafter to compare, during subsequent working or report cycles of the machine, the pattern of output signals thus registered and memorised during the introductory, correct and approved working or report cycle with the actual pattern working or report cycle in order, in the event of a discre ⁇ pancy therebetween, to generate a fault signal for stopping the machine.
  • Said control unit is operative to collect or register the information representing the yarn- infeed phase in the form of the pattern of output signals from the yarn guards on the occurrrence of a pulse which is generated once per machine revolution by a signal emitter similarly connec ⁇ ted to the control unit.
  • a further signal emitter similarly connected to the control unit and being operative to genera ⁇ te and deliver to the control unit a pulse on the start of each reporting cycle in the machine.
  • the system according to the present invention is characterised in that the above-mentioned motion sensing yarn guard itself is used as a sensor in order, during a registration cycle, to build up a memory bank against which subsequent working cycles may operate.
  • the system will generate a stop signal to the machine in question.
  • the system according to the present invention essentially comprises the following components:
  • the operational mode in the system according to the present invention proceeds such that the machine is set at a new working cycle with the stop function of the system de-acti ⁇ vated. This entails but a minor drawback, since the machine is still constantly monitored manually at this stage and with ordinary stop functions.
  • a registration button on the central unit is depres ⁇ start pulse (report start pulse). Those emitters (sensors) which detect running yarn on the occurrence of each revolu ⁇ tion pulse are then registered and memorised in the central unit, this procedure continuing until such time as the next report start pulse occurs.
  • a memory bank is created in the central unit in the form of a pattern of the yarn consumption or yarn motion sequence during one machine or report cycle.
  • the system is arranged such that the stop func ⁇ tion automatically becomes operative in the event of a discrepancy between the actually registered pattern of out ⁇ put signals from the yarn motion sensors on each revolution pulse and the norm values of sensor signal patterns on each revolution pulse which were memorised in the memory bank of the central unit during the registration cycle.
  • the ⁇ re is a reset button on the central unit which disconnects the stop function until the next report start pulse occurs.
  • Fig 1 is a flow diagram of one physical application of the present invention.
  • Fig 2 is a block diagram of one embodi ⁇ ment for carrying out the practical application according to fig l.
  • the embodiment of the present invention may be applied on a machine for knitting of different types of products, for instance stockings or socks.
  • Each one of the included threads is allocated an emitter which is operative to emit an electric signal on thread movement.
  • the machine is provided with an emitter which is operative to generate an electric signal or flag pulse (designated "FLAG" in figs 1 and 2) and which defines a thread movement sensing period during one machine revolution, which may also be designated a pattern stage or knitting revolution.
  • the term machine revolution may also be taken to refer to a machine cycle.
  • the products which is to be knitted consists of a number of knitting cycles or pat ⁇ tern stages which together form the product and its pattern.
  • the machine also includes an emitter which is operative to generate an electric signal or sync-pulse ("SYNC" in figs 1 and 2) on the commencement of each products, and thereby on the initiation of a new pattern.
  • fig 2 shows the hardware section
  • fig 1 illust ⁇ rates the software section or a flow diagram for the softwa ⁇ re section, which is also easy to reduce into practice according to generally accepted methods for a person skilled in this art.
  • the hardware section according to fig 2 includes a number of integrated circuits 1-11 which are all currently available on the market.
  • the integrated circuit IC3 is a micro-com ⁇ tains the program requisite for the function of the circuit.
  • the integrated circuit IC8 is a registration or memorization circuit.
  • the integrated circuit IC10 is an AD converter, while the integrated circuit IC2 is both an input and output circuit.
  • the integrated circuit IC7 is a battery back-up circuit for the registration circuit IC8, while the integra ⁇ ted circuit subunits IC4, IC5 and IC6 form decoder units. Otherwise, the symbols in the coupling diagram are of the generally accepted type.
  • a switch Si is connected to the input and output circuit IC2 for switching the apparatus to and from a learn mode or learn phase.
  • a reset button “RESET” which, after actuation, always entails resetting of the electronic circuits and the program to the initial position.
  • a sensor circuit “SENS” which receives a flag pulse which determines that period of time during which thread movement is to be sensed in each pattern stage or machine revolution.
  • a circuit unit “SYNC” is coupled to the input and output circuit IC2 for entry of a sync-pulse on commencement of each product.
  • a num ⁇ ber of light emitting diodes (LEDs) LD1-LD4 for indicating the presence of a flag pulse, sync-pulse, check total CHK and learn mode, respectively.
  • LEDs light emitting diodes
  • All thread movement signal emitters are of the current emit ⁇ ter type and are installed on the machine on per se known way to be actuated by the threads at least when they are moving, are coupled in parallell and to the AD converter IC10 via the connection points 9P14, 2P14 and 10P14.
  • the integrated circuit IC11 and the potentiometer PI and is supplied by the circuit connected to the connection point 1P14.
  • a learn phase Prior to the commencement o£ a completely new product, for example a sock, a learn phase must, naturally, always be carried out, in which the light emitting diode LD4 is lit.
  • the apparatus awaits a flag pulse which entails that pattern stage 1 has been commenced and CLR cleared, the registration circuit or memory circuit IC8 (the computer circuits) are zeriozed. As long as there is a flag pulse, the signal from the AD converter IC10 is read at very short intervals, eg 100 microseconds and these readings are stored or registered in the memory cirucit IC8.
  • the mean value of the read-offs executed during the pulse flag is calculated and, if the apparatus is in the learn mode (LEARN) , the resultant mean value is registered. If, on the other hand, the appara ⁇ tus is in the sensing mode, the thus resultant mean value is compared with the value previously memorized during a learn tion. If the difference between the mean value arrived at during the sensing operation does not deviate by more than a certain predetermined number of units from the memorized value, the apparatus passes to the next pattern stage, but if the difference is greater, a signal which triggers an -alarm or stop function is generated, whereby the relays RE1 and RE2 are energized.
  • fig 1 illustrates an automatic switching to the learn mode if the check total is incorrect, it is difficult, in most cases, to carry out an automatic learn mode run. If the check total is incorrect, this should lead to a signal trig ⁇ gering an alarm and/or stop function. In principle, all learn mode runs must be monitored and the subsequently finished product must be inspected before switching to the sensing mode is executed.
  • the signals for each pattern sta ⁇ ge are stored in the registration or memory circuit IC8 and the machine may be run for manufacture of identical products for several days, several weeks or several months, without the necessity of implementing a new learn phase.
  • a plurality of mutually subsequent sig ⁇ nals will be understood as the signal from one and the same pattern stage in mutually subsequent products, but it may, naturally, just as well relate to signals from several mutually subsequent pattern stages in the same product, whe the pattern stages are alike and the registered signals for each respective pattern stage are substantially alike or do not differ from one another more than by the predetermined number of units permitted between registered signal and sen sed signal, i e the calculated mean value of a number of sensings of one and the same signal.
  • Every working or report cycle may include one or several machine revolutions or all the machine revolutions necessary to obtain a comple ⁇ te sock or stocking.
  • a pattern step may include one or several machine revolutions and a sock or stocking may include one or several pattern steps.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Socks And Pantyhose (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

Système de contrôle pour métiers rectilignes, notamment pour machines destinées au tricotage de bonneterie ou de chaussettes, comprenant un certain nombre de garde-fils affectés à chaque fil destinés à alimenter la machine, les garde-fils répondant chacun respectivement à un mouvement ou à une absence de mouvement du fil détecté de ce fait et produisant un signal de sortie pour arrêter la machine en cas, par exemple, de rupture du fil ou de toute autre anomalie au niveau de l'alimentation en fil, au moyen, de préférence, d'une unité de commande électronique connectée aux garde-fils. L'invention se caractérise essentiellement en ce que l'unité de commande comprend un moyen de mémoire et de commande et est, dans ce cas, agencée pour rassembler et mémorise, pendant un cycle de travail ou de signalisation d'introduction, correct et approuvé de la machine, des informations donnant une représentation de la phase d'alimentation en fil, sous la forme des signaux de sortie effectifs provenant des garde-fils. De plus l'unité de commande est en agencée ensuite afin de commander, pendant les cycles de travail ou de signalisation consécutifs de la machine, le modèle type de signaux de sortie aussi enregistré et mémorisé pendant le cycle de travail ou de signalisation d'introduction, correct et approuvé avec le modèle type effectif de signaux de sortie enregistré pendant le cycle de travail ou de signalisation postérieure en cours, afin de produire un signal d'anomalie pour arrêter la machine en cas de désaccord entre les signaux.
EP88903974A 1987-04-16 1988-04-15 Systeme de controle pour metiers rectilignes Expired - Lifetime EP0385988B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88903974T ATE95580T1 (de) 1987-04-16 1988-04-15 Regelungssystem fuer wirkmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8701619 1987-04-16
SE8701619A SE462757B (sv) 1987-04-16 1987-04-16 Oevervakningssystem foer stickmaskiner

Publications (2)

Publication Number Publication Date
EP0385988A1 true EP0385988A1 (fr) 1990-09-12
EP0385988B1 EP0385988B1 (fr) 1993-10-06

Family

ID=20368240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88903974A Expired - Lifetime EP0385988B1 (fr) 1987-04-16 1988-04-15 Systeme de controle pour metiers rectilignes

Country Status (6)

Country Link
EP (1) EP0385988B1 (fr)
JP (1) JP2731814B2 (fr)
KR (1) KR970000017B1 (fr)
DE (1) DE3884812T2 (fr)
SE (1) SE462757B (fr)
WO (1) WO1988008048A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1242051B (it) * 1990-04-20 1994-02-02 Tiziano Barea Perfezionamenti relativi al controllo del corretto assorbimento dei fili utilizzati in una macchina tessile,in particolare per maglieria o calzetteria
IT1246039B (it) * 1990-07-10 1994-11-07 Tiziano Barea Disopositivo per il controllo del funzionamento di macchine in particolare di macchine tessili in grado di autoapprendere il ciclo operativo di queste ultime e di correggere i propi errori in tale fase di autoapprendimento
IT1243970B (it) * 1990-12-04 1994-06-28 Flavio Barea Metodo e dispositivo per il controllo automatico della quantita' di filo alimentato ad una macchina tessile operante su di esso, in modo discontinuo.
JPH0514186U (ja) * 1991-08-02 1993-02-23 グンゼ株式会社 フアツシヨニング異常検出装置
DE10112795A1 (de) 2001-03-16 2002-09-26 Iro Ab Verfahren zur Produktionsüberwachungs/Einstellung einer Strickmaschine, und Produktionsüberwachungs/Einstellungs-Vorrichtung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS229287B1 (en) * 1982-12-23 1984-06-18 Kouklik Ivo Circuit arrangement for signal processing evaluation
CS246465B1 (en) * 1983-03-18 1986-10-16 Otakar Curda Thread motion guard

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8808048A1 *

Also Published As

Publication number Publication date
EP0385988B1 (fr) 1993-10-06
KR890700704A (ko) 1989-04-26
JPH02504654A (ja) 1990-12-27
WO1988008048A1 (fr) 1988-10-20
DE3884812T2 (de) 1994-03-17
SE8701619L (sv) 1988-12-12
SE8701619D0 (sv) 1987-04-16
DE3884812D1 (de) 1993-11-11
SE462757B (sv) 1990-08-27
KR970000017B1 (ko) 1997-01-04
JP2731814B2 (ja) 1998-03-25

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