EP0206876B1 - Dispositif de détection magnétique du bord d'une étoffe non parallèle à son sens d'avancement lors d'une opération de couture - Google Patents

Dispositif de détection magnétique du bord d'une étoffe non parallèle à son sens d'avancement lors d'une opération de couture Download PDF

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Publication number
EP0206876B1
EP0206876B1 EP86401165A EP86401165A EP0206876B1 EP 0206876 B1 EP0206876 B1 EP 0206876B1 EP 86401165 A EP86401165 A EP 86401165A EP 86401165 A EP86401165 A EP 86401165A EP 0206876 B1 EP0206876 B1 EP 0206876B1
Authority
EP
European Patent Office
Prior art keywords
sewing machine
magnetic field
detection device
needle
needle plate
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
EP86401165A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0206876A1 (fr
Inventor
Charly Leclaire
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.)
Prouvost SA
Original Assignee
Prouvost 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 Prouvost SA filed Critical Prouvost SA
Priority to AT86401165T priority Critical patent/ATE43656T1/de
Publication of EP0206876A1 publication Critical patent/EP0206876A1/fr
Application granted granted Critical
Publication of EP0206876B1 publication Critical patent/EP0206876B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D05B69/22—Devices for stopping drive when sewing tools have reached a predetermined position
    • D05B69/24—Applications of devices for indicating or ascertaining sewing-tool position

Definitions

  • the present invention intends to propose a simple device for fulfilling this function of detecting the passage of the edge of the fabric.
  • a device for detecting the passage of the edge of a piece of fabric, not parallel to the direction of advancement of the fabric, for a sewing machine comprising in particular a presser foot, a needle and a plate.
  • needle characterized in that it comprises means for generating a magnetic field and means sensitive to this magnetic field, some being coupled to said presser foot so that they can, on the one hand, be applied to said piece d material at a point located at a distance and in front of said needle of the sewing machine relative to said direction of advancement of the fabric, and on the other hand, to be displaced relative to said presser foot in a direction substantially perpendicular to the plane of said needle plate, the other means being mounted opposite the first means and fixedly in the sewing machine, under said needle plate.
  • said means coupled to the presser foot are pivotally mounted relative thereto, about an axis substantially parallel to said needle plate and perpendicular to said direction of advance of the fabric.
  • a sewing machine not shown as a whole comprises a needle 1, a presser foot 2 comprising a rod and a sole by which it presses the fabric, and a needle plate 3 on which slides the fabric which is driven by claws not shown and protruding through the needle plate 3.
  • An L-shaped arm 8 is mounted fixed at one end on the rod of the presser foot 2, in the vicinity of its sole, this arm extends in a plane substantially parallel to the plane formed by the needle plate 3 and has a free end directed forward, relative to the direction of travel A of the fabric, that is to say towards the portion of the fabric not yet sewn.
  • At the free end of the arm 8 are pivotally mounted relative thereto, about an axis substantially parallel to the needle plate 3 and perpendicular to the direction of advance A of the fabric, means for generating a magnetic field.
  • these means comprise a permanent magnet 7 in the form of a finger pivotally mounted at one end on the arm 8 and supporting at a second end a rolling member 9.
  • the rolling member 9 is applied to the fabric by the weight of the permanent magnet 7; it avoids that the permanent magnet 7 marks or wears the fabric.
  • the arm 8 and the permanent magnet 7 are dimensioned so that the rolling member 9 is applied to the fabric at a point located at a distance and in front of the needle 1, relative to the direction of advance A of l 'fabric.
  • Means sensitive to a magnetic field are mounted opposite said permanent magnet 7 and fixedly in the sewing machine, under the needle plate 3. They include, in this example, a Hall effect sensor 10 in the form of 'A plate arranged parallel to the needle plate.
  • the upper piece 4 of which has an edge 4a offset relative to the not shown edge of the lower piece of fabric 5.
  • the edge 4a does not is not parallel to the advance movement A of the fabric during the production of a seam 6.
  • said seam 6 must be stopped at a certain distance from the edge 4a.
  • the bearing 9 leaves the upper piece of fabric 4 and is applied to the lower piece of fabric 5: the permanent magnet 7 has therefore been moved towards the sensor 10, by a distance corresponding to the thickness of the piece of fabric superior 4.
  • the displacement of the permanent magnet 7 creates a brutal difference in the magnetic field to which the sensor 10 is subjected, which generates a variation of the aforesaid voltage that the operating device 11 can interpret to deliver a signal in the direction of a microprocessor for controlling the sewing machine, this device is particularly suitable for assembling thick fabrics as they are found in furniture or pieces of leather so that the movement, on passing the edge, is d sufficient amplitude to obtain a significant variation in the magnetic field to which the sensor 10 is subjected, so that it itself can show at the output a variation in potential difference large enough to be able to be used without ambiguity compared to the variations generated by irregularities surface area of the upper piece of fabric 4.
  • the device 11 for processing the output signal from the sensor 10 may include a p calibration and adjustment procedure of the sensor sensitivity allowing to obtain a good precision as for the moment when the passage of the edge is detected.
  • the invention finds an interesting application in the field of sewing machine equipment.
  • the magnetic generator must be able to be moved relative to the presser foot. Indeed, a movement of the presser foot 2 itself due to the change in thickness of fabric occurs, of course, when the upper piece of fabric 4 completely leaves the presser foot 2, but, as will be readily understood, too late to order the end of sewing operation for this piece of fabric. This movement of the presser foot cannot therefore be used to control the end of sewing operation.
  • the magnetic generator that will be used can be kept in contact with the fabric, not only under the effect of its own weight, but for example under the effect of a force generated by an elastic device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Geophysics And Detection Of Objects (AREA)
EP86401165A 1985-06-03 1986-06-02 Dispositif de détection magnétique du bord d'une étoffe non parallèle à son sens d'avancement lors d'une opération de couture Expired EP0206876B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86401165T ATE43656T1 (de) 1985-06-03 1986-06-02 Magnetische detektionsvorrichtung des werkstueckrandes fuer naehmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8508319A FR2582685B1 (fr) 1985-06-03 1985-06-03 Dispositif de detection magnetique du bord d'une etoffe non parallele a son sens d'avancement lors d'une operation de couture
FR8508319 1985-06-03

Publications (2)

Publication Number Publication Date
EP0206876A1 EP0206876A1 (fr) 1986-12-30
EP0206876B1 true EP0206876B1 (fr) 1989-05-31

Family

ID=9319801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86401165A Expired EP0206876B1 (fr) 1985-06-03 1986-06-02 Dispositif de détection magnétique du bord d'une étoffe non parallèle à son sens d'avancement lors d'une opération de couture

Country Status (12)

Country Link
US (1) US4729329A (enExample)
EP (1) EP0206876B1 (enExample)
JP (1) JPS61279297A (enExample)
KR (1) KR870000474A (enExample)
AT (1) ATE43656T1 (enExample)
BR (1) BR8602542A (enExample)
CA (1) CA1264839A (enExample)
DE (1) DE3663696D1 (enExample)
ES (1) ES8704221A1 (enExample)
FR (1) FR2582685B1 (enExample)
IL (1) IL78946A (enExample)
PT (1) PT82699B (enExample)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000040008A (ko) * 1998-12-17 2000-07-05 구광시 나일론 연신사 제조용 유제 조성물.
US6748889B2 (en) * 2002-09-26 2004-06-15 John D. Martelli Sewing machine pressure foot assembly for quilt designs
CA2640148C (en) 2006-01-27 2014-09-09 Suturtek Incorporated Apparatus and method for tissue closure
JP6998698B2 (ja) * 2017-08-03 2022-02-10 Juki株式会社 ミシン

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3408563A (en) * 1965-02-12 1968-10-29 Bell Inc F W Magnetic-field-responsive proximity detector apparatus utilizing a hall-effect device
US4166423A (en) * 1978-02-28 1979-09-04 The Singer Company Adaptive sewing machine
JPS5931355B2 (ja) * 1978-06-15 1984-08-01 蛇の目ミシン工業株式会社 縫い判別と指令機能を有するミシンの検知装置
US4232617A (en) * 1979-04-16 1980-11-11 The Singer Company One-step buttonholer with hall effect sensor
IT1123314B (it) * 1979-09-25 1986-04-30 Rockwell Rimoldi Spa Dispositivo orlatore a punto invisibile specialmente adatto per l'orlatura di tessuti tubolari
DE3144127C2 (de) * 1981-11-06 1983-12-15 Union Special Gmbh, 7000 Stuttgart Sensoreinrichtung für Nähmaschinen
DE3323214C1 (de) * 1983-06-28 1984-10-11 Dürkoppwerke GmbH, 4800 Bielefeld Optoelektronische Abtastvorrichtung an einer Naehmaschine
US4565140A (en) * 1984-02-06 1986-01-21 Microdynamics, Inc. Method and apparatus for automatically adjusting the sensitivity of edge sensors in a semi-automatic sewing machine

Also Published As

Publication number Publication date
EP0206876A1 (fr) 1986-12-30
ES555659A0 (es) 1987-04-01
PT82699A (fr) 1986-07-01
US4729329A (en) 1988-03-08
JPS61279297A (ja) 1986-12-10
PT82699B (pt) 1992-07-31
CA1264839A (fr) 1990-01-23
BR8602542A (pt) 1987-02-03
KR870000474A (ko) 1987-02-18
ES8704221A1 (es) 1987-04-01
FR2582685B1 (fr) 1988-05-13
DE3663696D1 (en) 1989-07-06
JPH0144357B2 (enExample) 1989-09-27
ATE43656T1 (de) 1989-06-15
IL78946A0 (en) 1986-09-30
IL78946A (en) 1990-04-29
FR2582685A1 (fr) 1986-12-05

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