EP1285112A2 - Machine a coudre comprenant un dispositif servant a viser une extremite de couture - Google Patents

Machine a coudre comprenant un dispositif servant a viser une extremite de couture

Info

Publication number
EP1285112A2
EP1285112A2 EP01960236A EP01960236A EP1285112A2 EP 1285112 A2 EP1285112 A2 EP 1285112A2 EP 01960236 A EP01960236 A EP 01960236A EP 01960236 A EP01960236 A EP 01960236A EP 1285112 A2 EP1285112 A2 EP 1285112A2
Authority
EP
European Patent Office
Prior art keywords
stitch
seam
needle
length
residual
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Withdrawn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
EP01960236A
Other languages
German (de)
English (en)
Inventor
Lothar Bruehl
Edgar Butzen
Karl-Ludwig Manuel
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.)
Pfaff Industriemaschinen GmbH
Original Assignee
Pfaff Industriemaschinen GmbH
GM Pfaff 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 Pfaff Industriemaschinen GmbH, GM Pfaff AG filed Critical Pfaff Industriemaschinen GmbH
Publication of EP1285112A2 publication Critical patent/EP1285112A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/22—Work-feeding means with means for setting length of stitch
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D05B69/20—Control devices responsive to the number of stitches made

Definitions

  • Sewing machine with a device for controlling a seam end point
  • the invention relates to a sewing machine according to the preamble of claim 1.
  • a device for controlling the end point of a seam is known in a sewing machine with bottom and needle feed, in which this process is traced by means of a scanning of the passage of the workpiece edge which runs transversely or angularly to the seam Sensor is triggered.
  • the device also includes a pulse generator, which detects the speed and the angular position of a machine shaft, by means of which the size of the partial stitch already pushed during edge detection is determined.
  • the computer causes the presetting of a stop to limit the movement stop of a follower coupled to the stitch setting device.
  • this follower is moved very quickly against the stop with the aid of a compressed air cylinder and the stitch adjusting device is thus adjusted to the desired shortened stitch length.
  • the stitch adjustment device If the stitch adjustment device is adjusted before or after the middle position of the fabric pusher, this therefore executes a forward or backward displacement movement aimed at the center of the needle. Since this takes place during the execution of a feed step in which the material pusher is in contact with the workpiece, the workpiece also carries out the offset movement of the material pusher, which is why this movement is also referred to as the pusher movement.
  • Fig. 4 shows the path of movement of the needle 5 during a transport cycle in which the stitch setting device is set to the stitch length S and ⁇
  • the path of movement of the needle 5 is symmetrical to the middle of the needle.
  • the needle bar leads from the existing kinematics mentioned above Stitch setting devices first of all an offset movement aimed in the direction of the center of the needle. The needle bar then moves by the dimension Sb / 2 in the feed direction V, viewed in front of the middle of the needle.
  • the invention has for its object a sewing machine with a
  • the invention is essentially based on the idea of adjusting the stitch setting device during the period of the return phase of the feed means before the sewing of a shortened end or residual seam stitch so that the resulting displacement path of the feed means is taken into account, so that the end stitch of the seam is included the required stitch length and the seam is terminated exactly at the point specified by the size of the respective seam spacing.
  • this method is also suitable for sewing several uniformly shortened residual stitching.
  • each individual shortened residual seam stitch takes into account the respectively occurring and thus current offset path and the stitch setting device can be set separately for each individual residual seam stitch.
  • the actuating means for the stitch setting device is formed by a stepper motor.
  • FIG. 2 shows a schematic illustration of a seam section with a shortened residual seam end stitch
  • FIG. 3 shows a schematic representation of a seam section with several uniformly shortened remaining seam stitches
  • Fig. 4 shows the path of movement of the needle during the execution of a transport cycle
  • Fig. 5 shows the path of movement of the needle after an adjustment of the stitch setting device with the effect of the displacement movement occurring during the adjustment
  • Fig. 6 shows the path of movement of the needle after adjustment of the stitch setting device with compensation for the offset movement carried out.
  • the base plate is denoted by 2 and the upper housing by 3.
  • a needle bar 4 with a needle 5, which can be moved up and down, is arranged in the head of the upper housing 3.
  • a gripper not shown, cooperates with the needle 5 in a known manner.
  • the feed mechanism 6 of the sewing machine is designed as a lower and needle feed and therefore consists of a fabric slide 7 and the needle 5 arranged in the base plate 2.
  • the needle bar 4 in a known manner in a needle bar pendulum not shown in the drawing.
  • the slider 7 and the needle bar pendulum are connected to a partially coupled drive mechanism which corresponds to the drive mechanism disclosed in DE-C2 and is therefore not shown and described again here.
  • a common stitch setting device 8 is used to set the feed size of the feed mechanism 6. It has a first actuating gear 9 for the material slide 7, shown schematically in FIG. 1, this gear 9 corresponding to the actuating gear 26 from the aforementioned DE-C2.
  • the stitch setting device 8 has a second, not shown, setting gear for the needle 5, which corresponds in a comparable manner to the setting gear 44 of DE-C2.
  • the actuating gear 9 is assigned an actuating shaft 10, which is usually connected to the actuating shaft of the second actuating gear via coupling members, so that both actuating gear always have the same setting value or are always set to the same stitch length.
  • the actuating shaft 10 is connected to a stepper motor 11. By coupling the two actuating gears, the stepping motor 11 serves as a common actuating means for both of them and thus for the stitch actuating device 8 as a whole.
  • a positioning motor 12 arranged in the base plate 2 and having a control 13 is used to drive the sewing machine 1.
  • the positioning motor 12 drives u. a. in a manner not explained in more detail on a drive shaft 14 for the material slide 7.
  • a pulse generator 15 is arranged on the positioning motor 12, which serves to determine the speed of the sewing machine 1 and the angular position of the drive shaft 14 when an edge K2 of a workpiece W passes through the light beam of a light barrier, of which only one sensor arranged at the head of the upper housing 3 16 is shown.
  • the computer 18 essentially consists of a processor 19, an I / O element 20 and at least one EPROM 21. Die
  • Control device 17 also contains a control panel 22 connected to computer 18.
  • the scanning point A of the sensor 16 is located at a distance L from the middle position M of the needle 5.
  • the sensor 16 reports the passage of the Edge K2 of the workpiece W through the scanning point A.
  • the size Sa of the partial stitch not yet completed during the edge detection is now described in the same way as in the aforementioned DE 33 24 715 C2, which is then to be taken into account in the remaining seam extending over the length I.
  • the number of those with an unchanged stitch is now determined by the computer 18 as a function of the residual seam length I and the stitch length S originally set - Length S of the residual seam stitch NR to be formed and the length Sb of the residual seam end stitch NRe are calculated.
  • the length Sb of the residual seam end stitch NRe forms the desired stitch length required for the precise completion of the seam B1 at point E.
  • the computer 18 also calculates the value Sen actually to be set according to the formula
  • Sen 2 x Sb - Sea.
  • the stitch setting device 8 must be set to the value -2 mm during the return phase of the feed means 5, 7 by means of the stepping motor 11, that is to say to a reverse stitch of 2 mm. If this is done, the feed mechanism 6 performs a forward feed movement of 1 mm in length for the formation of the residual seam end stitch NRe, as it corresponds to the required desired stitch length Sb.
  • the stitch setting device 8 must be at the value
  • the length Sc of the residual seam stitches NRv forms the desired stitch length of the last three remaining seam stitches NRv required for the precise termination of the seam B1 in point E.
  • the computer 18 also calculates the value Sen to be actually set for each of the last three remaining seam stitches NRv, specifically according to the formula
  • Sen 2 x Sc - Sea.
  • the stitch setting device 8 must be set separately for each individual residual seam stitch NRv in order to compensate for the current offset path that occurs in each case.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

La présente invention concerne une machine à coudre comprenant un dispositif servant à viser une extrémité prédéterminée (E) d'une couture (B1). Selon l'invention, le mouvement de décalage des éléments d'avancement de la machine à coudre, résultant du réglage du dispositif de réglage de piqûre, est pris en considération lors de la détermination de la longueur de piqûre théorique (Sb) de la dernière piqûre éventuellement raccourcie (NRe) de la couture, de sorte que l'on obtient pour le dispositif de réglage de piqûre, une valeur de référence différente de la longueur de piqûre théorique.
EP01960236A 2000-05-29 2001-05-23 Machine a coudre comprenant un dispositif servant a viser une extremite de couture Withdrawn EP1285112A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10028273 2000-05-29
DE10028273 2000-05-29
PCT/EP2001/005906 WO2001092628A2 (fr) 2000-05-29 2001-05-23 Machine a coudre comprenant un dispositif servant a viser une extremite de couture

Publications (1)

Publication Number Publication Date
EP1285112A2 true EP1285112A2 (fr) 2003-02-26

Family

ID=7645048

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01960236A Withdrawn EP1285112A2 (fr) 2000-05-29 2001-05-23 Machine a coudre comprenant un dispositif servant a viser une extremite de couture

Country Status (5)

Country Link
US (1) US6776112B2 (fr)
EP (1) EP1285112A2 (fr)
JP (1) JP4799799B2 (fr)
DE (1) DE10125068C2 (fr)
WO (1) WO2001092628A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114075723A (zh) * 2020-08-17 2022-02-22 杰克缝纫机股份有限公司 一种拐角缝线迹控制方法、系统、装置和双针缝纫机

Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
JP4625367B2 (ja) * 2005-05-12 2011-02-02 Ｊｕｋｉ株式会社 差動送りミシン
JP5113487B2 (ja) * 2007-10-31 2013-01-09 Ｊｕｋｉ株式会社 玉縁縫いミシン及びその縫い基準位置特定方法
JP2009189626A (ja) * 2008-02-15 2009-08-27 Brother Ind Ltd ミシン
CN102277696B (zh) * 2010-06-09 2015-03-11 Vsm集团股份公司 送料器移动补偿
US8731704B2 (en) * 2011-03-04 2014-05-20 Brother International Corporation Method and device for dynamically controlling stitch formation in a sewing device
CN103276541B (zh) * 2013-06-07 2015-02-04 杰克缝纫机股份有限公司 双针机针杆自动分离复位的控制方法
CN111926468B (zh) * 2020-08-18 2021-12-21 浙江杰克智能缝制科技有限公司 布边缝控制方法、装置及具有布边缝控制装置的缝纫机

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DE3228789A1 (de) * 1982-08-02 1984-02-02 Quick-Rotan Elektromotoren GmbH, 6100 Darmstadt Antriebs- und steuervorrichtung fuer naehmaschinen, naehautomaten und dergleichen
DE3236932A1 (de) * 1982-10-06 1984-04-12 Dürkoppwerke GmbH, 4800 Bielefeld Verfahren und positioniervorrichtung zum plazieren des letzten nadeleinstiches an vorbestimmter stelle im naehgut
DE3324715A1 (de) * 1983-07-08 1985-01-24 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Naehmaschine mit einer einrichtung zum ansteuern eines vorbestimmten endpunktes einer naht
DE3342391C1 (de) 1983-11-24 1985-03-14 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Naehmaschine mit Nadel und Untertransport und einer Einrichtung zum Ansteuern eines vorbestimmten Endpunktes einer Naht
JPS6182783A (ja) * 1984-09-28 1986-04-26 ジューキ株式会社 ミシンの定位置停止装置
JPS61103482A (ja) * 1984-10-25 1986-05-21 ジューキ株式会社 ミシンの布送り量自動変更装置
JPS61131793A (ja) * 1984-11-30 1986-06-19 ジューキ株式会社 ミシンの布端位置検知装置
JPS61181486A (ja) * 1985-02-08 1986-08-14 ジューキ株式会社 ミシンの布送り量自動変更装置
JPS61217197A (ja) * 1985-03-20 1986-09-26 ブラザー工業株式会社 ミシン
JPS61249494A (ja) * 1985-04-27 1986-11-06 ジューキ株式会社 ミシンの布送り量自動変更装置
FR2582682B1 (fr) * 1985-06-03 1988-06-10 Prouvost Sa Procede pour rendre automatique l'execution d'une fin de couture a une distance determinee du bord de l'etoffe et machine a coudre mise en oeuvre
JPS625393A (ja) * 1985-06-29 1987-01-12 ブラザー工業株式会社 ミシンにおける定寸縫い装置
JPS625395A (ja) * 1985-06-29 1987-01-12 ブラザー工業株式会社 ミシンにおける布端部の定寸縫い装置
JPH0667430B2 (ja) * 1985-06-29 1994-08-31 ブラザー工業株式会社 ミシンにおける定寸縫い装置
JPS625397A (ja) * 1985-06-29 1987-01-12 ブラザー工業株式会社 プレイバツクミシンにおける定寸縫い装置
JPS625388A (ja) * 1985-06-29 1987-01-12 ブラザー工業株式会社 ミシンにおける布端部の定寸縫い装置
JPS62129095A (ja) * 1985-11-29 1987-06-11 ジューキ株式会社 ミシンの１針縫い装置
DE3815303A1 (de) * 1988-05-05 1989-11-16 Pfaff Ind Masch Verfahren zur ausfuehrung eines naehvorganges mit einer naehmaschine mit nadeltransport

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* Cited by examiner, † Cited by third party
Title
See references of WO0192628A2 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114075723A (zh) * 2020-08-17 2022-02-22 杰克缝纫机股份有限公司 一种拐角缝线迹控制方法、系统、装置和双针缝纫机
CN114075723B (zh) * 2020-08-17 2022-11-25 杰克科技股份有限公司 一种拐角缝线迹控制方法、系统、装置和双针缝纫机

Also Published As

Publication number Publication date
DE10125068A1 (de) 2002-03-28
WO2001092628A2 (fr) 2001-12-06
US6776112B2 (en) 2004-08-17
JP4799799B2 (ja) 2011-10-26
US20040099191A1 (en) 2004-05-27
WO2001092628A3 (fr) 2002-04-04
JP2003534853A (ja) 2003-11-25
DE10125068C2 (de) 2002-08-01

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