EP1571248A1 - Machine à coudre avec un système de contrôle du fil d'aiguille - Google Patents

Machine à coudre avec un système de contrôle du fil d'aiguille Download PDF

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Publication number
EP1571248A1
EP1571248A1 EP05004203A EP05004203A EP1571248A1 EP 1571248 A1 EP1571248 A1 EP 1571248A1 EP 05004203 A EP05004203 A EP 05004203A EP 05004203 A EP05004203 A EP 05004203A EP 1571248 A1 EP1571248 A1 EP 1571248A1
Authority
EP
European Patent Office
Prior art keywords
thread
needle
sewing machine
needle thread
eyelet
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.)
Withdrawn
Application number
EP05004203A
Other languages
German (de)
English (en)
Inventor
Johann Enns
Sevki Dr.-Ing. Hosagasi
Andree Cramer
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
Priority claimed from DE102004060244A external-priority patent/DE102004060244A1/de
Application filed by Duerkopp Adler AG filed Critical Duerkopp Adler AG
Publication of EP1571248A1 publication Critical patent/EP1571248A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B51/00—Applications of needle-thread guards; Thread-break detectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/008—Illumination for oven cavities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/02—Stoves or ranges heated by electric energy using microwaves

Definitions

  • the invention relates to a sewing machine according to the preamble of the claim 1.
  • a sewing machine in which between the thread tensioning device and the thread lever, a thread tension detecting means is arranged.
  • This device essentially consists from a downwardly open U-shaped deflection, in the strain gauges are mounted. The one of the thread tensioning device The next needle thread is deflected by more than 90 ° and then led to the thread lever, from where he essentially is guided straight to the needle.
  • corresponding electrical voltages are generated in be processed by a microprocessor, creating a miss can be recognized.
  • the known embodiment is at least extraordinary inaccurate and therefore not reliable.
  • the invention is based on the object, a sewing machine of the generic type Art to design so that the detection of a missing stitch or a needle thread breakage reliably and with little effort is recognizable.
  • the sewing machine shown in Fig. 1 has in the usual way an upper Arm 1, a box-like base plate 2 and the arm 1 and the Base plate 2 on each end connecting stand 3, d. H. the Sewing machine is C-shaped.
  • an arm shaft 4 is mounted, at its lying outside of the arm 1 end of a handwheel. 5 carries and attached to the next to the handwheel 5, a rotary pulse transmitter 6 is. From the arm shaft 4 in the usual way the drive a Needle bar 7 with a needle 8 and a presser foot 9 derived.
  • a vertical gripper 10 In the base plate 2 is a vertical gripper 10 about a vertical axis eleventh rotatably mounted in a gripper bearing 12.
  • the drive of the gripper 10 takes place arranged by means of one in the base plate 2 below the stator 3 Drive motor 13 via a gripper drive shaft 14. From this Shaft 14 and the arm shaft 4 is driven by a belt drive 15.
  • the arm 1 is also a likewise driven by the arm shaft 4 Thread lever 16 arranged for a needle thread 17.
  • This needle thread 17 is from a thread supply, not shown, in a needle thread feeding direction 18 fed to the thread lever 16, via a Thread lever 16 - in relation to the feed direction 18 - upstream thread tensioning device 19.
  • This is on a support plate attached to the arm 1 20 of ferritic material, for example steel, attached.
  • the Needle thread 17 is on the thread tensioning device 19 and the thread lever 16 is fed to a mis-stitch detection means 21 and from there forwarded to the needle 8.
  • the mis-stitch detection device 21 is also mounted on the support plate 20.
  • the mis-stitch detection means 21 a mounted on the support plate 20 spring housing 22nd in which a leg spring 23 is held by a screw 24.
  • the leg spring 23 protrudes through a substantially down and to the needle thread 17 side facing slot 25 of the Spring housing 22 from the latter down out.
  • At her lower outside the housing 22 end carries the leg spring 23 a Thread eyelet 26.
  • Above and below and in total laterally next to the Missing stitching means 21 are upper to the support plate 20 Thread guide 27 and a lower thread guide 28 mounted by the the coming of the thread lever 16 needle thread 17 without significant deflection is guided by the thread lever 16 to the needle 8.
  • a Permanent magnet 32 attached, in coincidence with the thread eyelet 26 and the adjacent region of the leg spring 23, the Steel, so a ferritic, that is magnetizable material.
  • a pole 34 is the thread eye 26 facing and - as Fig. 3 reveals - closely adjacent.
  • the sensor housing 30 is in addition to the magnet 32 a to changes the magnetic field responsive sensor 36, so usually one Hall generator, arranged.
  • This sensor 36 is connected by means of a line 37 switched to an input of a controller 38.
  • the controller 38 is still on connected to a power supply line 39 and has a Connecting line 40 to the pedal of the sewing machine, not shown on. Furthermore, the control via a rotary-pulse line 41 with the Rotary-pulse encoder 6 connected. Finally, the controller 38 with the Drive motor 13 connected via a control line 42.
  • the controller 38 has in the usual way switch 43 and indicator lights 44.
  • Fig. 4 shows three stitch positions in the Nähgut former 45, 46, namely - from left to right - a correct stitch 47, a missing stitch position 48 and again a correct stitch 49. In the middle between the two correct stitches 47, 49 so no stitch formation has taken place.
  • the needle thread 17 When the needle thread 17 has its greatest tension, the needle thread 17 is in the area the mis-stitch detection device 21 in its most pronounced elongated position, which is indicated by dashed lines in Fig. 2. If he opposes it has its lowest thread tension, it is in its in Fig. 2 shown pulled position in which the leg spring 23 against a stop 52 of the spring housing 22 abuts. The needle thread 17 is therefore transverse to its predetermined by the thread guides 28, 29 Main direction in the form of a triangle pulled out. The greater the thread tension is, the more obtuse is this triangle, how vivid From Fig. 2 shows.
  • the sensor 36 outputs an electrical voltage U, which depends on the movement the leg spring 23 with eyelet 26 in the magnetic field of the magnet 32nd depends.
  • U an electrical voltage
  • Fig. 5 in which the sensor 36 to the controller 38 delivered voltage U over the rotation angle W of a full Rotation of the arm shaft 4 is shown, the output from the sensor 36 Voltage U1 greatest when the thread lever 16 is in his High position is when the thread tension in the needle thread 17 so on biggest one is.
  • the tension decreases with the lowering of the thread lever 16 during the trick down to a very low value U2.
  • This tension U2 is thus released when the needle thread 17 largely relaxed is and the leg spring 23 abuts against the stop 52.
  • the voltage drops back to the Value U2 from until the thread lever 16 is moved back up and the Needle thread tensioned until at the end of a turn of the arm shaft 4 and so that a full stroke of the needle 8 is back in its high position and so that the needle thread 17 is tensioned, causing the electrical voltage again increases to the value U1.
  • the above-described voltage curve returns its target value.
  • the micro-processor gives 53 from a corresponding signal, so that then from the controller 38 of Drive motor 13 is stopped and, if necessary, the indicator light 44 lights up. If a breakage of the needle thread 17 takes place, then it sinks the voltage U of the sensor 36 continuously to the value U2 from what also leads to a stop of the sewing machine, because again a Deviation of the actual value of the voltage from the desired value is present.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP05004203A 2004-03-03 2005-02-25 Machine à coudre avec un système de contrôle du fil d'aiguille Withdrawn EP1571248A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102004010234 2004-03-03
DE102004010234 2004-03-03
DE102004060244 2004-12-15
DE102004060244A DE102004060244A1 (de) 2004-03-03 2004-12-15 Nähmaschine mit einer Fehlstich-Erfassungs-Einrichtung

Publications (1)

Publication Number Publication Date
EP1571248A1 true EP1571248A1 (fr) 2005-09-07

Family

ID=34751401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05004203A Withdrawn EP1571248A1 (fr) 2004-03-03 2005-02-25 Machine à coudre avec un système de contrôle du fil d'aiguille

Country Status (4)

Country Link
EP (1) EP1571248A1 (fr)
JP (1) JP2005246060A (fr)
KR (1) KR20060043325A (fr)
CN (1) CN1664214A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102128746A (zh) * 2010-12-22 2011-07-20 广州微点焊设备有限公司 显微焊接微拉力测量仪
NL2007749C2 (en) * 2011-11-08 2013-05-13 Interface Internat B V Carpet manufacturing method and assembly, yarn marking device, and computer program.

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102851888A (zh) * 2012-09-17 2013-01-02 吴江市晓昱喷气织造有限公司 缝纫机用防滑装置
CN105671810B (zh) * 2016-03-30 2018-04-20 苏州泉海机电制造有限公司 线材检测挑线杆结构
CN105937101A (zh) * 2016-06-24 2016-09-14 杰克缝纫机股份有限公司 一种缝纫机及其断线检测机构
DE112017005646B4 (de) * 2017-03-31 2021-10-07 Mitsubishi Electric Corp. Nähmaschine
JP7093225B2 (ja) * 2018-05-21 2022-06-29 Juki株式会社 縫い目検査装置
JP7454921B2 (ja) * 2019-07-11 2024-03-25 Juki株式会社 縫い目検査装置、縫い目検査方法、及びコンピュータプログラム

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4328757A (en) * 1979-08-13 1982-05-11 Janome Sewing Machine Co. Ltd. Thread tension control signal output device for sewing machine
US4565143A (en) * 1983-02-01 1986-01-21 Janome Sewing Machine Co., Ltd. Method of automatically adjusting thread tension in a sewing machine
WO1993006291A1 (fr) * 1991-09-13 1993-04-01 The Charles Stark Draper Laboratory, Inc. Procede et dispositif servant a detecter les points sautes dans une machine a coudre a points de chainette
DE19856620A1 (de) * 1998-12-08 2000-06-15 Ksm Kaiserslautern Stickmaschi Stichbildende Maschine und Verfahren zum Erkennen von Fehlfunktionen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4328757A (en) * 1979-08-13 1982-05-11 Janome Sewing Machine Co. Ltd. Thread tension control signal output device for sewing machine
US4565143A (en) * 1983-02-01 1986-01-21 Janome Sewing Machine Co., Ltd. Method of automatically adjusting thread tension in a sewing machine
WO1993006291A1 (fr) * 1991-09-13 1993-04-01 The Charles Stark Draper Laboratory, Inc. Procede et dispositif servant a detecter les points sautes dans une machine a coudre a points de chainette
DE19856620A1 (de) * 1998-12-08 2000-06-15 Ksm Kaiserslautern Stickmaschi Stichbildende Maschine und Verfahren zum Erkennen von Fehlfunktionen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102128746A (zh) * 2010-12-22 2011-07-20 广州微点焊设备有限公司 显微焊接微拉力测量仪
CN102128746B (zh) * 2010-12-22 2014-07-23 广州微点焊设备有限公司 显微焊接微拉力测量仪
NL2007749C2 (en) * 2011-11-08 2013-05-13 Interface Internat B V Carpet manufacturing method and assembly, yarn marking device, and computer program.
WO2013070072A3 (fr) * 2011-11-08 2013-07-25 Interface European Manufacturing B.V. Procédé et ensemble de fabrication de tapis, dispositif de marquage de fil et programme informatique

Also Published As

Publication number Publication date
CN1664214A (zh) 2005-09-07
KR20060043325A (ko) 2006-05-15
JP2005246060A (ja) 2005-09-15

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