EP0011689B1 - Verfahren und Vorrichtung zur Bildung einer Überwendlichnaht mit Hilfe einer Zickzack-Nähmaschine - Google Patents

Verfahren und Vorrichtung zur Bildung einer Überwendlichnaht mit Hilfe einer Zickzack-Nähmaschine Download PDF

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Publication number
EP0011689B1
EP0011689B1 EP79103367A EP79103367A EP0011689B1 EP 0011689 B1 EP0011689 B1 EP 0011689B1 EP 79103367 A EP79103367 A EP 79103367A EP 79103367 A EP79103367 A EP 79103367A EP 0011689 B1 EP0011689 B1 EP 0011689B1
Authority
EP
European Patent Office
Prior art keywords
needle
thread
loop
overstitch
sewing machine
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
EP79103367A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0011689A1 (de
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/de
Application granted granted Critical
Publication of EP0011689B1 publication Critical patent/EP0011689B1/de
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 invention has for its object to develop a method for forming an overlock seam, according to 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 securely and durably and is not contracted in the seam area, so that the seam becomes Sewing together and edging edges of particularly thin materials, knitwear and knitwear as well as similar elastic textiles is suitable.
  • 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.
  • the presser bar 21, which is under spring action, and the needle bar 22 are arranged.
  • 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 in a known manner vertical up and down movements and optionally transversely ge directed pendulum movements between the overstitch positions labeled 1 and II.
  • a fabric presser sole 33 which is articulated on a shaft 34, works together with the 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 a take-over mandrel 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 a thrust bracket 47, which is guided by a transverse bore in the shaft 39 and is in contact with the bush 42 and projects in the overstitch position 1 of the needle bar 22 into the path of movement of the cylinder head 24 of the needle fastening screw 25.
  • 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 start bracket for the needle bar.
  • a loop scraper 51 is fastened to the presser sole 33 by means of a screw 50, which extends from its attachment point on the sole 33 in an arc shape to the 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 an extending end with its free end in the material feed direction (arrow V) projects into a groove (not shown) on the underside of the sole Stitching tongue 53 is attached.
  • the needle 26 sticks first in point 1, FIGS. 4 to 6, and a tangle of needle and looper thread is formed.
  • the needle bar 22 - without the sewing material W being displaced - changes into the overstitch position II, whereby the starting brackets 47 and 48 are released and the shaft 39 with the overlocking mandrel 41 through the torsion spring 43 into that 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 material at point 2 and the next interlacing of the needle thread NF and the looper 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 of the sewing material W during its axial movement.
  • the next puncture of the Nadet 26 is then point 3.
  • the needle bar 22 After forming the interlacing of needle thread NF and looper thread GF in point 3, the needle bar 22 also executes a pendulum movement in the overstitch position I to insert the needle 26 at point 4 during its axial movement.
  • the piece of thread lying on the sewing mandrel 41 is pulled out into a loop S between points 1 and 2 by the needle rod 22 first striking the bent end 49 of the pin 48 and rotating the shaft 39 with the mandrel 41 so that the Loop S of the needle 26 is bent for the puncture at point 4.
  • the shaft 39 with the take-over mandrel 41 is further rotated by the cylinder head 24 of the needle fastening screw 25 striking the start bracket 47 during the further downward movement of the needle bar 22 such that the loop S in the interaction of the sewing mandrel 41 is stripped from the sewing mandrel with the scraper stripper 51, on the front edge of which the sewing mandrel 41 is moved past.
  • a further loosening of the thread placed over the overlocking mandrel 41 is thereby achieved.
  • the stripped loop S is stripped from the overlocking mandrel 41 in the same way as in the production of the seam according to FIG. 4.
  • the further sequences 1'-4 'and 1 "-4" are formed like the sequence 1-4.
  • the overlock seam according to FIGS. 3 and 6 differs from the seam according to FIG. Only in that after the needle bar 22 has been changed from the first interlacing of needle and looper thread in point 1 into the overstitch ply 11 and the thread interlacing in point 2, two straight stitches sewn in the stitch position II.
  • the pulling out of the loop S into the overlay position I for the insertion of the needle 26 into this loop at point 5 takes place again by reversing the direction of advance and the loosening of the loop S from the overlocking mandrel 41 as in the formation of the seam according to FIGS. 4 and 5.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP79103367A 1978-12-02 1979-09-10 Verfahren und Vorrichtung zur Bildung einer Überwendlichnaht mit Hilfe einer Zickzack-Nähmaschine Expired EP0011689B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=6056220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79103367A Expired EP0011689B1 (de) 1978-12-02 1979-09-10 Verfahren und Vorrichtung zur Bildung einer Überwendlichnaht mit Hilfe einer Zickzack-Nähmaschine

Country Status (4)

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

Families Citing this family (8)

* 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
DE3067167D1 (en) * 1980-09-19 1984-04-26 Dorina Naehmasch Method and device for producing an overedge seam with the aid of a zigzag sewing machine
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

Family Cites Families (3)

* 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
CH606570A5 (enrdf_load_stackoverflow) * 1977-03-14 1978-11-15 Mefina Sa

Also Published As

Publication number Publication date
DE2852299C2 (de) 1980-09-18
DE2852299B1 (de) 1980-01-10
JPS5576682A (en) 1980-06-09
EP0011689A1 (de) 1980-06-11
JPS6141594B2 (enrdf_load_stackoverflow) 1986-09-16
US4250824A (en) 1981-02-17

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