EP0011689A1 - Procédé et dispositif pour l'exécution d'un surjet au moyen d'une machine à coudre zig-zag - Google Patents

Procédé et dispositif pour l'exécution d'un surjet au moyen d'une machine à coudre zig-zag Download PDF

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Publication number
EP0011689A1
EP0011689A1 EP79103367A EP79103367A EP0011689A1 EP 0011689 A1 EP0011689 A1 EP 0011689A1 EP 79103367 A EP79103367 A EP 79103367A EP 79103367 A EP79103367 A EP 79103367A EP 0011689 A1 EP0011689 A1 EP 0011689A1
Authority
EP
European Patent Office
Prior art keywords
needle
thread
stitch
loop
needle bar
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
EP79103367A
Other languages
German (de)
English (en)
Other versions
EP0011689B1 (fr
Inventor
Günter Meier
Rolf Kessler
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.)
OFFERTA DI LICENZA AL PUBBLICO
Original Assignee
Dorina Nahmaschinen GmbH
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 Dorina Nahmaschinen GmbH filed Critical Dorina Nahmaschinen GmbH
Publication of EP0011689A1 publication Critical patent/EP0011689A1/fr
Application granted granted Critical
Publication of EP0011689B1 publication Critical patent/EP0011689B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
    • D05B3/02—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing with mechanisms for needle-bar movement
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B93/00—Stitches; Stitch seams
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers

Definitions

  • the needle and looper thread are intertwined each time the needle is inserted, both at the outer edge of the fabric and at a distance from it - that is to say in both needle stitch positions. All overstitching is carried out in the feed direction.
  • this seam is only formed by controlling the stitch movements of the needle and the feed movements of the fabric pusher, which means that it is a pure zigzag seam, it suffers from the disadvantage of all known zigzag seams that it has a thread tension of needle which is significantly reduced compared to a straight seam. and looper thread must be sewn in order to keep the unavoidable contraction of the seam and thus also the material to be sewn in the seam area as inevitable when the stitch is drawn in, which is particularly noticeable in the manufacture of an edge retaining seam. This can be avoided entirely the manufacture of one, however, if a proper and still sufficiently tight interlacing of needle and looper thread is to be achieved by the stitch feed.
  • the invention has for its object to develop a method for forming an overlock seam, by means of which a seam can be produced, by means of which the material to be sewn - for example two layers of fabric - is sewn to one another firmly and durably and is not contracted in the seam area, so that the Seam is suitable for sewing together and edging edges of particularly thin materials, knitwear and knitwear as well as similar elastic textiles.
  • a device which is particularly easy to control for carrying out the method according to the invention results from the features specified in the characterizing part of patent claim 3.
  • the sub-claims 4 and 5 relate to advantageous details of the device.
  • a needle holder 23 is arranged, in which the needle 26 is fastened by means of a fastening screw 25 having a cylinder head 24 and which cooperates with a thread-guiding gripper 28 arranged under the needle plate 27 for stitch formation.
  • the needle bar 22 are issued in a known manner, vertical up and down movements and optionally transverse movements between the top stitch positions designated 1 and II.
  • a fabric presser sole 33 which is articulated on a shaft 34, works together with the above webs 31 of the fabric slide 32.
  • the shaft 34 is fastened by means of a wing screw 35 to the lower end of the presser bar 21, which is acted upon downwards by a presser spring, not shown.
  • the shaft 34 is extended to one side and is formed into a bearing bracket 36 with two angularly bent bearing webs 37 and 38, in which a shaft 39 is rotatably and longitudinally displaceably mounted.
  • An angle lever 40 is attached to the lower end of the shaft 39, which protrudes outward through the bearing web 38, the free end of which points in the direction of the material feed (arrow V) and forms an upper seam 41.
  • a spacer bush 42 and a torsion spring 43 which has two free legs 44, 45, are arranged on the shaft 39 between the two bearing webs 37 and 38.
  • the shaft 39 is axially secured via the straight end 46 of the thrust bracket 47 which is guided by a transverse bore in the shaft 39 and is in contact with the bush 42 and which in the upper stitch position I of the needle bar 22 moves into motion path of the cylinder head 24 of the needle fastening screw 25 protrudes.
  • a pin 48 with a tight fit is pressed, which has a bent free end 49, which is arranged in the pendulum movement path of the needle bar 22 and serves as a thrust bracket for the needle bar.
  • a loop stripper 51 is fastened by means of a screw 50, which extends from its attachment point on the sole 33 in an arc to the upper sewing mandrel 41 and whose front edge is arranged in the path of movement of the mandrel 41.
  • a recess 52 is provided in the presser sole 33 for the passage of the needle 26, and that in the sole 33. one with its free end extending in the material feed direction (arrow V) extends into a groove (not shown) on the Stitch-forming tongue 53 protruding underside is attached.
  • the needle 26 first pierces in point 1, FIGS. 4 to 6, and a tangle of needle and looper thread is formed.
  • the needle bar 22 - without the Nangut W being shifted - changes to the overstitch position 11.
  • the thrust bars 47 and 48 are released and the shaft 39 with the upper sewing mandrel 41 by the torsion spring 43 into the one shown in FIG 1 and 2 position shown is rotated.
  • the needle thread NF is placed over the overlocking mandrel 41, so that it has a greater length than the distance 1-2.
  • the needle 26 sticks into the sewing material at point 2 and the next interlacing of needle thread NF and hook thread GF takes place.
  • the sewing material W is now shifted by a stitch length in the feed direction, arrow V, while the needle 26 is outside the sewing material W during its axial movement.
  • the next puncture of the needle 26 is then in point 3.
  • the needle bar 22 After forming the interlacing of needle thread NF and hook thread GF in point 3, the needle bar 22 also executes a pendulum movement in the overstitch position I to puncture the needle 26 at point 4 during its axial movement.
  • the control of the needle bar pendulum movements and the movements of the fabric pusher is carried out by appropriate actuation of the zigzag stitch actuator and the feed stitch actuator of the sewing machine, expediently by means of a separate cam disc using a suitable linkage.
EP79103367A 1978-12-02 1979-09-10 Procédé et dispositif pour l'exécution d'un surjet au moyen d'une machine à coudre zig-zag Expired EP0011689B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2852299A DE2852299C2 (de) 1978-12-02 1978-12-02 Verfahren und Vorrichtung zur Bildung einer Überwendlichnaht mit Hilfe einer Zickzack-Nähmaschine
DE2852299 1978-12-02

Publications (2)

Publication Number Publication Date
EP0011689A1 true EP0011689A1 (fr) 1980-06-11
EP0011689B1 EP0011689B1 (fr) 1982-02-03

Family

ID=6056220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79103367A Expired EP0011689B1 (fr) 1978-12-02 1979-09-10 Procédé et dispositif pour l'exécution d'un surjet au moyen d'une machine à coudre zig-zag

Country Status (4)

Country Link
US (1) US4250824A (fr)
EP (1) EP0011689B1 (fr)
JP (1) JPS5576682A (fr)
DE (1) DE2852299C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048293A1 (fr) * 1980-09-19 1982-03-31 Dorina Nähmaschinen GmbH Procédé et dispositif pour l'exécution d'une couture surjetée au moyen d'une machine à coudre zigzag

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56102274A (en) * 1980-01-21 1981-08-15 Janome Sewing Machine Co Ltd Hemstitching sewing method by zigzag sewing machine
JPS596676B2 (ja) * 1980-03-14 1984-02-14 ペガサスミシン製造株式会社 ２本針オ−バロックミシンの空環縫込み方法及びその装置
JPS57119781A (en) * 1981-01-19 1982-07-26 Janome Sewing Machine Co Ltd Hemming sewing method by zigzag sewing machine
JPS587285A (ja) * 1981-07-07 1983-01-17 蛇の目ミシン工業株式会社 ジグザグミシンによる縁かがり縫方法及び装置
US4644884A (en) * 1983-07-28 1987-02-24 Pegasus Sewing Maching Mfg. Co., Ltd. Thread chain sewing apparatus for use in overedge sewing machine
JPS6274399A (ja) * 1985-09-27 1987-04-06 蛇の目ミシン工業株式会社 ミシンの下糸糸道変更装置
JP2564809B2 (ja) * 1986-10-02 1996-12-18 ブラザー工業株式会社 止め縫装置を備えたジグザグミシン

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2384050A1 (fr) * 1977-03-14 1978-10-13 Mefina Sa Procede de couture au voisinage du bord d'un tissu pour en empecher l'effilochage

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1509111A (en) * 1922-06-21 1924-09-23 Roger N Saleeby Seam
US3126850A (en) * 1961-05-08 1964-03-31 Safety stitch sewing machines

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2384050A1 (fr) * 1977-03-14 1978-10-13 Mefina Sa Procede de couture au voisinage du bord d'un tissu pour en empecher l'effilochage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048293A1 (fr) * 1980-09-19 1982-03-31 Dorina Nähmaschinen GmbH Procédé et dispositif pour l'exécution d'une couture surjetée au moyen d'une machine à coudre zigzag
EP0048293B1 (fr) * 1980-09-19 1984-03-21 Dorina Nähmaschinen GmbH Procédé et dispositif pour l'exécution d'une couture surjetée au moyen d'une machine à coudre zigzag

Also Published As

Publication number Publication date
JPS6141594B2 (fr) 1986-09-16
JPS5576682A (en) 1980-06-09
DE2852299B1 (de) 1980-01-10
DE2852299C2 (de) 1980-09-18
EP0011689B1 (fr) 1982-02-03
US4250824A (en) 1981-02-17

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