EP1384806A1 - Procédé pour tirer l'extrémité libre d'un fil d'aiguille depuis la surface supérieure d'un tissu vers sa surface inférieure et machine à coudre pour la mise en oeuvre de ce procédé - Google Patents

Procédé pour tirer l'extrémité libre d'un fil d'aiguille depuis la surface supérieure d'un tissu vers sa surface inférieure et machine à coudre pour la mise en oeuvre de ce procédé Download PDF

Info

Publication number
EP1384806A1
EP1384806A1 EP03015351A EP03015351A EP1384806A1 EP 1384806 A1 EP1384806 A1 EP 1384806A1 EP 03015351 A EP03015351 A EP 03015351A EP 03015351 A EP03015351 A EP 03015351A EP 1384806 A1 EP1384806 A1 EP 1384806A1
Authority
EP
European Patent Office
Prior art keywords
thread
needle
presser
fabric
needle thread
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
EP03015351A
Other languages
German (de)
English (en)
Other versions
EP1384806B1 (fr
Inventor
Johann Enns
Sevki Dr.-Ing. Hosagasi
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.)
Duerkopp Adler AG
Original Assignee
Duerkopp Adler AG
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 Duerkopp Adler AG filed Critical Duerkopp Adler AG
Priority to SI200330796T priority Critical patent/SI1384806T1/sl
Publication of EP1384806A1 publication Critical patent/EP1384806A1/fr
Application granted granted Critical
Publication of EP1384806B1 publication Critical patent/EP1384806B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B47/00—Needle-thread tensioning devices; Applications of tensometers
    • D05B47/04—Automatically-controlled tensioning devices
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B29/00—Pressers; Presser feet
    • D05B29/02—Presser-control devices

Definitions

  • the invention relates to a method for pulling the free end of the thread a needle thread from the top of at least one Nähgutmaschines on the bottom of the first stitch of a seam to be sewn according to the The preamble of claim 1 and a sewing machine for implementation the method according to the preamble of claim 3.
  • a method and a sewing machine of the generic type is known from DE 36 04 299 C2 (according to US-PS 4, 658, 752) known.
  • the pressing force of the fabric presser drive is adjustable. This should be possible, even very thin, light use tearing threads or extra thick threads.
  • the Thread clamp adjustable in its acting on the needle thread friction force is adjustable.
  • the invention is based on the object, a method of the generic Kind and a sewing machine for performing the method so to design that adaptation to different sewing conditions, in particular different thicknesses of the at least one workpiece part is reached.
  • the object continues according to the invention in a sewing machine the preamble of claim 3 by the features in the characterizing part solved.
  • the invention is particularly advantageous Can be used on a sewing machine with alternating fabric pressers and needle transport.
  • the sewing machine shown in the drawing has an upper arm. 1 and a lower box-like base plate 2, which by a stand. 3 are connected together to form a C-shaped housing.
  • an arm shaft 4 mounted by means of a belt drive 5 of a Motor 6 is driven.
  • a control box 7 Connected to the motor 6 is a control box 7, in which a microprocessor controller 8 is housed.
  • a needle bar 10 up and down driven, at the lower end of a needle 11 is attached.
  • a gripper 12 is arranged, in the usual manner derived from the arm shaft 4 is rotatably driven about its axis.
  • In arm 1 is also a lifting gear 14 for adjusting the lifting height a arranged by still to be described Stoffd Wegern to which a control shaft 15 heard.
  • This actuating shaft 15 has a guide groove 16 in which a Slider 17 is arranged longitudinally displaceable.
  • On the sliding block 17 is a lever 18 pivotally mounted with one end, the other end with a first arm 19 of an angle lever 20 is pivotally connected.
  • the angle lever 20 is at the intersection of its first arm 19 and his second arm 21 pivotally supported in a machine-fixed bearing 22.
  • the lever 18 engages approximately centrally a pull rod 23, which is connected to a Excenter 24 attacks, which in turn is coupled to the arm shaft 4.
  • a fabric presser 25 is further arranged, the one in a Sliding bearing 26 vertically displaceably mounted presser rod 27th and has a pusher foot 28 attached to the lower end thereof.
  • the fabric presser 25 is also a function of a fabric presser performing pulp conveyor 29 arranged, the one in a Sliding bearing 30 slidably arranged feed dog rod 31, at the lower end of a transport foot 32 is attached.
  • the Sliding bearing 30 and thus the mass transferor 29 is in a swing frame 33 attached, in which also the needle bar 10 in another Sliding bearing 34 is slidably mounted, wherein the feed dog rod 31 and the needle bar 10 are arranged parallel to each other.
  • Oscillating frame 33 is pivotally mounted in a bearing 35 in the arm 1 and is by means of a thruster, not shown on a Pulling rod 36 driven, via a bearing 37 with the swing frame 33 is pivotally connected.
  • a thrust gear is, for example from DE 34 23 843 C2 (corresponding to US 4,616,586) known.
  • the drive of the fabric presser 25 and the material conveyor 29 is carried out by the angle lever 20, the second arm 21 with a triangular trained drive lever 38 is pivotally connected, wherein the second Arm 21 via a pull rod 21 a with a tip of the drive lever 38th connected is. At the other two tips are transmission lever 39, 40 articulated with the upper ends of the fabric pusher rod 27 and the feed dog rod 31 are hinged.
  • the drive lever 38 in turn, is pivotally supported by a link 41 in a bearing 42, which is arranged in the arm 1.
  • the handlebar 41 is biased by a Screw compression spring 43 loaded, so that the handlebar 41 and so that the presser foot 25 and the fabric conveyor 29 down be pressed.
  • the stop 45th has, which is associated with the handlebar 41 below the compression spring 43.
  • On stop lever 44 engages a pneumatically acted on piston-cylinder drive trained stop adjustment drive 46, wherein whose piston rod 47 is articulated on the stop lever 44, while its cylinder 48 is hinged in the stator 3.
  • the drive 46 is designed as unilaterally acted piston-cylinder drive, i. at the piston rod 47, a piston 49 is mounted, of which the piston rod 47 opposite side via a compressed air line 50 by means of compressed air can be acted upon, so that when compressed air is applied to the piston rod 47 is pushed out of the cylinder 48, whereby the stopper 45 for Stop lever 44 is adjusted towards.
  • the control shaft 15 for the presser foot 25 is provided with a control lever 55, by means of which the actuating shaft 15 are pivoted about its axis can, which in turn the location of the guide groove 16 for the sliding block 17 is changed.
  • the lever 55 With the lever 55 so the lifting height is the a Presser 25 and the fabric conveyor 29 set.
  • the smallest and the largest value of the adjustable lifting height a is indicated by two on the arm 1 attached adjustable limit stops 56, 57 set between which engages a mounted on the control shaft 15 lever 58. It For example, 2.0 mm ⁇ a ⁇ 8.0 mm.
  • a rotary potentiometer 59 is coupled, via a signal line 60, the rotational angular position of the control shaft 15 as a measured variable to the controller 8 reports.
  • the needle thread 62 is from this stock 61 in the usual way via a thread tensioning device 63, a thread lever 64 and a thread clamp 65 led to the needle 11.
  • the thread tensioning device 63 is from DE 28 09 848 C2 (corresponding to US 4,289,087). She points two the needle thread 62 between them thread tension discs 68th and an electromagnet 67. According to the electromagnet 67 applied voltage is between the clamping washers 66 thus an adjustable friction force on the needle thread 62nd exerted, whereby this receives a corresponding thread tension.
  • the thread clamp 65 which is immediately upstream of the needle 11, points a clamping washer 68 which is fixed to a guide rod 69, the is again loaded by a compression spring 70, whereby the clamping disc 68 is pulled against an abutment 71 which is attached to the arm 1 is.
  • abutment 71 is further formed by a wire winding 72
  • Electromagnet 72 mounted by means of a drive line 73 can be controlled by the controller 8 forth.
  • the throat plate 76 is with provided a cut through which a lower feed dog 77 through protrudes, which has a tap hole 77a for the passage of the needle 11.
  • the lower feed dog 77 is kinematically with the mentioned thrust gear connected such that the stitch hole 77 a in synchronism with during the stitch formation in the Nähgutmaschine 74, 75 piercing and the transport movement also executing needle 11 is moved.
  • the described Construction and operation are in sewing machines with so-called Needle transport common and well known.
  • the two workpieces 74, 75 have a total thickness s.
  • the lifting height a the feet 28, 32 on the workpieces 74, 75 represents the operator by means of the control lever 55 a. It is assumed that the Operator with increasing thickness s of the workpiece parts 74, 75 the Lifting height a increases, because with increasing thickness s the compressibility the two workpieces 74, 75 increases.
  • the needle 11 dives with the needle thread 62 through the Nähgutmaschine 74, 75 in the needle hole 77 a.
  • the transport foot 32 in the lowered position and the feed dog 77th in a raised position, so that the Nähgutmaschine 74, 75 between the feed dog 77 and the transport foot 32 are clamped.
  • the pusher foot 28 according to the lifting height a above the fabric part 74, so that unimpeded advancing the from the needle 11 interspersed Nähgutmaschine 74, 75 in a feed direction 82 takes place.
  • the thread clamp 65 is opened, so that the needle thread 62 unimpeded as a result of the downward movement of the needle 11 can be.
  • the gripper tip 79 of the detected rotating gripper 12 during the upward movement of the needle eleventh formed needle-thread loop 78. With progressive upward movement the needle 11 finally exits them from the fabric parts 74, 75. Meanwhile, the gripper 12 has a complete looping of the needle-thread loop 78 causes the looper thread supply 13. Subsequently, the Excess needle thread 62 through the thread lever 64 to form a Lockstitch seam 81 withdrawn. After that, the pusher foot 28 and the transport foot 32 implemented, so that the pusher foot 28th on the workpieces 74, 75 touches and the transport foot 32 to the Lifting height a lifts from the same. During normal sewing the thread clamp 65 serves only as a guide of the needle thread 62; she so do not slow him down. The described stitch formation and the way of working the alternating-acting pusher feet 28, 32 are with needle transport common and known.
  • the first seam to be sewn seam 81 is the free end 83 of the needle thread 62, so the needle thread beginning, above the workpieces 74, 75 and is between the upper fabric part 75 and the pusher foot 28 clamped with one of the bias of the Compression spring 43 dependent force.
  • the distance b of the stopper 45 from the handlebar 41 increases with increasing Thickness s of the fabric pieces 74, 75 too, i. the idle stroke from the beginning of the extension the piston rod 47 to the abutment of the stop 45 on the handlebars 41 increases with increasing material thickness s.
  • the duration of the activation of the stop adjustment drive 46 enlarged and that according to an empirical determined, in Fig. 7 indicated function, where the loading time t is shown above the lifting height a. This feature is in one ROM 84 of the controller 8 down.
  • the larger the fabric thickness s is, the larger - as indicated above - the lifting height a.
  • the driving time of the Stop adjustment drive 46 increases, whereby the loss of time during the idle stroke is compensated over the distance b.
  • the with increasing Thickness s of the fabric parts 74, 75 increasing compressibility of the Workpiece parts 74, 75 balanced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP03015351A 2002-07-27 2003-07-08 Procédé pour tirer l'extrémité libre d'un fil d'aiguille depuis la surface supérieure d'un tissu vers sa surface inférieure et machine à coudre pour la mise en oeuvre de ce procédé Expired - Lifetime EP1384806B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200330796T SI1384806T1 (sl) 2002-07-27 2003-07-08 Postopek vlečenja prostega konca niti igelne niti od zgornje strani za šivanje na njegovo spodnjo stran in šivalni stroj za izvedbo postopka

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10234251 2002-07-27
DE10234251A DE10234251C1 (de) 2002-07-27 2002-07-27 Verfahren zum Ziehen des freien Fadenendes eines Nadelfadens von der Oberseite eines Nähgutteils auf dessen Unterseite und Nähmaschine zur Durchführung des Verfahrens

Publications (2)

Publication Number Publication Date
EP1384806A1 true EP1384806A1 (fr) 2004-01-28
EP1384806B1 EP1384806B1 (fr) 2007-03-07

Family

ID=27816222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03015351A Expired - Lifetime EP1384806B1 (fr) 2002-07-27 2003-07-08 Procédé pour tirer l'extrémité libre d'un fil d'aiguille depuis la surface supérieure d'un tissu vers sa surface inférieure et machine à coudre pour la mise en oeuvre de ce procédé

Country Status (10)

Country Link
US (1) US6805063B2 (fr)
EP (1) EP1384806B1 (fr)
JP (1) JP4310144B2 (fr)
KR (1) KR100987843B1 (fr)
CN (1) CN100469966C (fr)
AT (1) ATE356239T1 (fr)
DE (2) DE10234251C1 (fr)
PT (1) PT1384806E (fr)
SI (1) SI1384806T1 (fr)
TW (1) TWI277674B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005049771A1 (de) * 2005-10-18 2007-04-19 Dürkopp Adler AG Nähmaschine

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7143705B2 (en) 2002-03-06 2006-12-05 L & P Property Management Company Multiple horizontal needle quilting machine and method
JP4526956B2 (ja) * 2005-01-05 2010-08-18 Ｊｕｋｉ株式会社 ミシン
JP4921093B2 (ja) * 2006-01-16 2012-04-18 Ｊｕｋｉ株式会社 ミシン
DE102007039596A1 (de) 2007-08-22 2009-02-26 Dürkopp Adler AG Nähmaschine sowie Verfahren zum Nähen eines Nahtanfangs mit einer derartigen Nähmaschine
US7997511B2 (en) * 2007-12-10 2011-08-16 Marshalltown Company Portable texture-spraying apparatus for uniformly dispersing a viscous material
DE102010043906A1 (de) * 2010-11-15 2012-05-16 Dürkopp Adler AG Nähmaschine sowie Verfahren zum Nähen eines Nahtanfangs mit einer derartigen Nähmaschine
DE102011005198A1 (de) 2011-03-07 2012-09-13 Dürkopp Adler AG Nähmaschine sowie Verfahren zum Nähen eines Nahtanfangs mit einer derartigen Nähmaschine
CH709666A1 (de) * 2014-05-16 2015-11-30 Bernina Int Ag Vorrichtung und Verfahren zum Beeinflussen der Lage von Knoten zwischen Oberfaden und Unterfaden beim Nähen mit einer Nähmaschine.
JP2016064096A (ja) * 2014-09-26 2016-04-28 ブラザー工業株式会社 ミシンとミシンの制御方法
DE102015223194B3 (de) * 2015-11-24 2017-02-23 Dürkopp Adler AG Verfahren zum Erzeugen eines Naht-Anfangsoberfadens mit kurzem Soll-Nahtüberstand sowie Baugruppe zur Durchführung des Verfahrens
DE102017201929A1 (de) 2017-02-08 2018-08-09 Dürkopp Adler AG Doppelsteppstich-Nähmaschine sowie Verfahren zur Erzeugung eines Naht-Anfangsoberfadens mit einem geringen Soll-Nahtüberstand
DE102017207627A1 (de) * 2017-05-05 2018-11-08 Dürkopp Adler AG Baugruppe zum Erzeugen eines Naht-Anfangsoberfadens mit einem Soll-Nahtüberstand

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166423A (en) * 1978-02-28 1979-09-04 The Singer Company Adaptive sewing machine
US4508043A (en) * 1982-11-18 1985-04-02 Pfaff Industriemaschinen Gmbh Presser foot device on a sewing machine
US4658752A (en) * 1985-04-16 1987-04-21 Kochs Adler, Ag Method and apparatus for drawing a needle thread through a workpiece
DE4436040C1 (de) * 1994-10-10 1996-02-22 Duerkopp Adler Ag Verfahren zur Erzeugung einer Naht mit einer Nahtunterbrechung in einem Nähgut und Nähmaschine zur Durchführung des Verfahrens

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2809848C2 (de) 1977-03-07 1983-01-05 Janome Sewing Machine Co., Ltd., Tokyo Elektronisch gesteuerte Musternähmaschine mit Fadenspannvorrichtung
DE3423843C2 (de) 1984-06-28 1987-04-30 Kochs Adler Ag, 4800 Bielefeld Obertransportvorrichtung an einer Nähmaschine
JPH05192464A (ja) * 1992-01-20 1993-08-03 Tokai Ind Sewing Mach Co Ltd ミシンの布押え駆動装置
JP3345286B2 (ja) 1996-11-20 2002-11-18 ブラザー工業株式会社 パターン縫いミシン
JP2002511327A (ja) * 1998-04-15 2002-04-16 ゲー エム パフ アクチエンゲゼルシャフト イン インゾルヴェンツ 縫製機または刺繍機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166423A (en) * 1978-02-28 1979-09-04 The Singer Company Adaptive sewing machine
US4508043A (en) * 1982-11-18 1985-04-02 Pfaff Industriemaschinen Gmbh Presser foot device on a sewing machine
US4658752A (en) * 1985-04-16 1987-04-21 Kochs Adler, Ag Method and apparatus for drawing a needle thread through a workpiece
DE4436040C1 (de) * 1994-10-10 1996-02-22 Duerkopp Adler Ag Verfahren zur Erzeugung einer Naht mit einer Nahtunterbrechung in einem Nähgut und Nähmaschine zur Durchführung des Verfahrens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005049771A1 (de) * 2005-10-18 2007-04-19 Dürkopp Adler AG Nähmaschine

Also Published As

Publication number Publication date
EP1384806B1 (fr) 2007-03-07
DE50306723D1 (de) 2007-04-19
TWI277674B (en) 2007-04-01
ATE356239T1 (de) 2007-03-15
DE10234251C1 (de) 2003-10-09
SI1384806T1 (sl) 2007-08-31
PT1384806E (pt) 2007-05-31
US20040173132A1 (en) 2004-09-09
JP4310144B2 (ja) 2009-08-05
JP2004057822A (ja) 2004-02-26
TW200402489A (en) 2004-02-16
CN100469966C (zh) 2009-03-18
US6805063B2 (en) 2004-10-19
KR20040012479A (ko) 2004-02-11
CN1478937A (zh) 2004-03-03
KR100987843B1 (ko) 2010-10-13

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