EP0097386B1 - Dispositif de sécurité pour machine à tricoter - Google Patents

Dispositif de sécurité pour machine à tricoter Download PDF

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Publication number
EP0097386B1
EP0097386B1 EP83200777A EP83200777A EP0097386B1 EP 0097386 B1 EP0097386 B1 EP 0097386B1 EP 83200777 A EP83200777 A EP 83200777A EP 83200777 A EP83200777 A EP 83200777A EP 0097386 B1 EP0097386 B1 EP 0097386B1
Authority
EP
European Patent Office
Prior art keywords
carriage
pulses
duration
fact
perforated strip
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
Application number
EP83200777A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0097386A1 (fr
Inventor
Louis Frund
Pierre-Lorrain Christinat
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.)
Atelier de Construction Steiger SA
Original Assignee
Atelier de Construction Steiger SA
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 Atelier de Construction Steiger SA filed Critical Atelier de Construction Steiger SA
Publication of EP0097386A1 publication Critical patent/EP0097386A1/fr
Application granted granted Critical
Publication of EP0097386B1 publication Critical patent/EP0097386B1/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
    • 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

Definitions

  • the present invention relates to a safety device for a straight knitting machine intended to ensure the stopping of the carriage in the event of an abrupt change in its speed following an impact or other incident such as jamming of the yarn.
  • Another solution used consists in measuring the torque necessary for driving the carriage by means of a spring. When the carriage encounters an abnormal resistance, the torque increases suddenly and the detection of this increase makes it possible to stop the carriage. However, such detection is crude and does not necessarily prevent damage.
  • the object of the present invention is to ensure simple, rapid and reliable detection, insensitive to disturbances other than disturbances of the movement of the carriage.
  • the device comprises means for generating pulses of length inversely proportional to the speed of the carriage, means for continuously measuring the variation in length (that is to say of duration) of these pulses and means for stopping the carriage when this variation exceeds a certain reference rate.
  • a metal blade 1 provided with equidistant perforations 2.
  • This blade 1 is advantageously constituted by the blade already present on certain machines for counting needles, the spacing of the perforations 2 corresponding to the gauge of the needle beds.
  • a stirrup 3 integral with the carriage and carrying on one side an emitter, for example a light-emitting diode and, on the other side, a sensor, for example a photodiode or a phototransistor.
  • This phototransistor can advantageously be mounted on a printed circuit comprising a first amplifier stage.
  • pulses are amplified and formed so that one obtains approximately the sequence of rectangular pulses shown in FIG. 2.
  • the signal obtained is processed by a processing unit CPU which delivers a “stop” signal when the analysis of this signal reveals a sudden disturbance in the movement of the carriage.
  • Fig. 2 schematically represents the train of pulses generated by the detector 3.
  • Each perforation 2 generates a positive pulse a followed by an interval b which can also be considered as a negative pulse.
  • the rate of change in the length of the positive pulses a is measured, on the one hand, and the rate of change in the length of the negative pulses b, on the other hand.
  • the first quotient is measured at time t ', immediately after the end of a positive pulse or upon the appearance of a negative pulse, while the second quotient is measured after each negative pulse, i.e. say as soon as a positive impulse appears.
  • the length of the pulses is advantageously measured by sampling and digital processing.
  • the rate of change is calculated and compared to the reference rate using a microprocessor.
  • the factor k is controlled by the knitting program.
  • This program can be contained in the processing unit CPU.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP83200777A 1982-06-11 1983-06-02 Dispositif de sécurité pour machine à tricoter Expired EP0097386B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3634/82 1982-06-11
CH363482 1982-06-11

Publications (2)

Publication Number Publication Date
EP0097386A1 EP0097386A1 (fr) 1984-01-04
EP0097386B1 true EP0097386B1 (fr) 1985-08-14

Family

ID=4260196

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83200777A Expired EP0097386B1 (fr) 1982-06-11 1983-06-02 Dispositif de sécurité pour machine à tricoter

Country Status (6)

Country Link
US (1) US4505135A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0097386B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS599249A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DD (1) DD209862A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3360569D1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES523171A0 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62169714U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1986-04-14 1987-10-28
DE3638713A1 (de) * 1986-11-13 1988-05-26 Stoll & Co H Sicherheitseinrichtung fuer flachstrickmaschinen
CN101835930B (zh) * 2007-12-21 2011-12-21 株式会社岛精机制作所 横机和横机中的异常振动的检测方法
EP3601651B1 (en) 2017-03-31 2023-08-23 NIKE Innovate C.V. Knitting machine with electronic auxiliary component and knitting method with electronic auxiliary component
CN109505053B (zh) * 2018-12-12 2020-10-16 福建睿能科技股份有限公司 横机机头组件及机头运动控制方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT303949B (de) * 1968-04-08 1972-12-11 Sick Erwin Vorrichtung zur Überwachung von Rundstrickmaschinen
CH525317A (de) * 1970-11-17 1972-07-15 Stoll & Co H Sicherungseinrichtung für Flachstrickmaschinen
US3780297A (en) * 1971-10-04 1973-12-18 Us Industries Inc Conveyor speed monitor
DE2229232C2 (de) * 1972-06-15 1981-11-19 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Vorrichtung zur dauernden Überwachung des Zustandes einer ununterbrochenen Reihe von gleichen, lichtreflektierenden Gegenständen
US4027982A (en) * 1975-04-23 1977-06-07 Kyodo Denshi Kogyo Co., Ltd. Needle detector for circular knitting machines
US3955407A (en) * 1975-04-29 1976-05-11 The Singer Company Method and apparatus for testing knitting machines
US4037157A (en) * 1976-04-05 1977-07-19 The United States Of America As Represented By The Secretary Of The Interior Electro-optical speed transducer
DE2919369A1 (de) * 1979-05-14 1980-11-27 Schieber Universal Maschf Flachstrickmaschine mit impulsgeber fuer die elektronische steuerung

Also Published As

Publication number Publication date
DE3360569D1 (en) 1985-09-19
EP0097386A1 (fr) 1984-01-04
JPS639063B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1988-02-25
DD209862A5 (de) 1984-05-23
JPS599249A (ja) 1984-01-18
ES8405093A1 (es) 1984-05-16
US4505135A (en) 1985-03-19
ES523171A0 (es) 1984-05-16

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