EP1897985B1 - Nähmaschine zum Vernähen zweier Nähgutteile unter Einarbeitung von Mehrweite - Google Patents

Nähmaschine zum Vernähen zweier Nähgutteile unter Einarbeitung von Mehrweite Download PDF

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Publication number
EP1897985B1
EP1897985B1 EP07013752A EP07013752A EP1897985B1 EP 1897985 B1 EP1897985 B1 EP 1897985B1 EP 07013752 A EP07013752 A EP 07013752A EP 07013752 A EP07013752 A EP 07013752A EP 1897985 B1 EP1897985 B1 EP 1897985B1
Authority
EP
European Patent Office
Prior art keywords
lifting
current
sewing machine
needle
sewing
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.)
Active
Application number
EP07013752A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1897985A2 (de
EP1897985A3 (de
Inventor
Karsten Filges
Bernd Pofalla
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
Publication of EP1897985A2 publication Critical patent/EP1897985A2/de
Publication of EP1897985A3 publication Critical patent/EP1897985A3/de
Application granted granted Critical
Publication of EP1897985B1 publication Critical patent/EP1897985B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/10—Work-feeding means with rotary circular feed members
    • D05B27/14—Work-feeding means with rotary circular feed members rotating discontinuously
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/24—Feed-dog lifting and lowering devices
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Programme-controlled sewing machines
    • D05B19/02—Sewing machines having electronic memory or microprocessor control unit
    • D05B19/12—Sewing machines having electronic memory or microprocessor control unit characterised by control of operation of machine
    • D05B19/16—Control of workpiece movement, e.g. modulation of travel of feed dog
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/10—Work-feeding means with rotary circular feed members
    • D05B27/12—Work-feeding means with rotary circular feed members rotating continuously
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/10—Work-feeding means with rotary circular feed members
    • D05B27/16—Work-feeding means with rotary circular feed members with differential feed motions
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/04—Lower casings
    • D05B73/08—Lower casings for column-type sewing machines

Definitions

  • the invention relates to a sewing machine for sewing two Nähgutmaschine incorporating fullness.
  • Such a sewing machine with the type designation class 550-16 of the applicant is known by public prior use.
  • the intermittent lifting of the upper feed dog is realized by a mechanically derived from the rotation of an arm shaft for driving the needle bar movement.
  • the associated design effort is significant.
  • the stroke cycle of the upper feed dog can be varied within certain limits by means of stops, a particularly automated adaptation of the lifting movement to changing sewing conditions is not possible.
  • a stroke drive motor operating independently of the needle drive provides the flexibility necessary for varying the settings of the intermittent lifting of the upper feed dog.
  • the intermittent lifting of the upper feed dog is in this case in particular synchronized in each case during the insertion the sewing needle.
  • an undesired relative displacement of the two workpiece parts to one another or of the two workpiece parts to a stitch hole of the sewing machine is avoided when the upper feed dog is raised.
  • the lifting height and preferably also the force with which the upper feed dog presses in its lowered position against the lower feed dog and thus clamps the intermediate work piece parts can be specified in fine tuning.
  • a linear motor according to claim 2 leads to a particularly simple construction of the independent lifting drive of the upper feed dog.
  • a lifting cycle according to claim 3 allows safe lifting operation of the upper feed dog. Such a stroke cycle can be synchronized with its stroke cycle even at high operating frequencies of the needle.
  • An embodiment of the lifting drive control device reduces noise during sewing operation, since the upper feed dog does not unbraked when lowering on the work piece parts or the lower feed dog. In addition to the noise pollution and a load on the components involved is reduced.
  • a lifting rod according to claim 5 leads to a simple mechanical construction of the hubverlagerbaren upper feed dog.
  • a support body according to claim 7 ensures that only that part of an upper feed dog assembly is actually displaced stroke, which is actually required for Nähgut-feed, namely a fitting on the fabric portion of the upper feed dog assembly, in this description as "upper feed dog” referred to as. This reduces the moving masses, so that the lifting drive can be synchronized with the movement of the needle even at high sewing frequencies.
  • a lift drive control device avoids the need for separate needle position determination by the lift drive control device.
  • the needle position information can be queried in the embodiment of the lifting drive control device according to claim 8 from the needle drive, which has a corresponding position sensor.
  • a sewing machine 1 has an upper arm 2, a vertical stand 3 and a lower housing, which is commonly referred to as a base plate 4.
  • the base plate 4 has an upwardly projecting column 5, which is why the sewing machine 1 is also referred to as a column sewing machine.
  • an arm shaft 6 is mounted, the z. B. in the sectional view of Fig. 2 is shown.
  • the drive of the arm shaft 6 and thus the essential sewing components of the sewing machine 1 via a mounted in the base plate 4 drive motor 7 and a not shown in the drawing and housed in the stator 3 belt drive.
  • vertically mounted needle bar 9 is vertically driven up and down driven, which carries a needle 10 at its lower end.
  • a gripper is rotatably mounted in the column 5. Sewing parts to be sewn are over a stitch hole plate 11 forming the top of the column 5 and projecting laterally along the sewing direction over the column 5, through which the needle 10 passes into the area of the gripper.
  • a lower feed dog assembly 12 and an upper feed dog assembly 13 are used.
  • the lower feed dog assembly 12 has two side by side lower conveyor belts 14, 15, which are designed as polyuretan-coated timing belt.
  • the conveyor belts 14, 15 are driven by a common drive via toothed disks mounted in the column 5 in such a way that they move at the same speed relative to the throat plate 11 in the sewing direction.
  • the upper conveyor belts 16, 17 are designed as closed endless conveyor belts and also as polyuretan-coated timing belt.
  • the upper conveyor belt 16 is arranged above the lower conveyor belt 14 and cooperates with this.
  • the upper conveyor belt 17 is disposed above the lower conveyor belt 15 and cooperates with this. In sewing direction, the upper conveyor belt 17 is arranged offset relative to the upper conveyor belt 16.
  • the needle 10 stands next to the upper conveyor belt 16 and from the direction of the Fig. 4 before the upper conveyor belt 17 in the fabric and passes a needle thread, not shown, between the two lower conveyor belts 14 and 15 to the gripper.
  • the upper conveyor belt 16 cooperates with the lower conveyor belt 14, the upper conveyor belt 16 is deflected by a deflection roller 18.
  • a deflection roller 18 In the course of the upper conveyor belt 16 is guided by deflection and guide elements so that a downwardly running conveyor belt run adjacent to an upwardly running conveyor belt run.
  • the guide and deflection elements are supported by a housing-fixed support structure 19th
  • this upper conveyor belt 17 is folded over a deflection roller 20.
  • the upper conveyor belt 17 is guided by deflection and guide elements so that a downwardly running conveyor belt run adjacent to an upwardly running conveyor belt run.
  • the guiding and deflecting elements for the upper conveyor belt 17 are supported by the support structure 19.
  • the upper conveyor belts 16, 17 are driven by adjacent toothed pulleys 21, 22, which are non-rotatably mounted on a drive shaft 23 running parallel to the arm shaft 6.
  • the latter is driven by a belt drive 24 by a belt drive stepper motor 25.
  • the upper conveyor belt 17 associated toothed disc 22 has a larger number of teeth than the upper conveyor belt 16 associated toothed disc 21, therefore, since both toothed discs 21, 22 from the same tape drive stepping motor 25th are driven, the upper conveyor belt 17 rotates at a greater transport speed than the upper conveyor belt sixteenth
  • the section of the upper conveyor belts 16, 17, which abuts the sewing material during the material feed, is also referred to below as "upper feed dog". designated.
  • the linear motor 26 is mounted on an adapter plate 27 on the arm 2 of the sewing machine 1.
  • the internal structure of the linear motor 26 with a magnetic core, from a bobbin with controllably current-carrying windings having stator unit and a moving unit with a permanent magnet sleeve disposed between the inner core and the stator and fixed by a bolt with a push and pull rod 28 is known to those skilled in the art.
  • the push and pull rod 28 of the linear motor 26 can be linearly displaced controlled in both directions in accordance with the energization of the stator windings along the rod direction.
  • a control line 29 is the linear motor 26 with a in the Fig. 1 schematically indicated lifting drive control device 30 in conjunction. The latter is in a manner not shown with other components of the sewing machine 1, in particular with the drive motor 7 and a position sensor of the arm shaft 6 in conjunction.
  • an adapter member 31 About an adapter member 31 is the push-pull rod 28 with a lifting rod 32 in push / pull connection.
  • the lifting rod 32 is axially guided by a guide eye 33 which is fixedly connected to the support structure 19.
  • the lifting rod 32 is connected via a connecting body 34 with lever-shaped support elements 35, 36 for the deflection rollers 18, 20 of the upper conveyor belts 16, 17.
  • the support members 35, 36 are pivotable relative to the connecting body 34 about pivot axes 37, 38 in order in the z. B. in the Fig. 7 shown lowered position of the upper conveyor belts 16, 17 to give a back pressure by a thick fabric. In this lowered position, the support members 35, 36 by not biased springs biased.
  • the exact position of the lowered position of the support member 36 can be specified via a screw 39 designed as an adjustable stop.
  • the drive rod of the linear motor 26, so the push / pull rod 28 is in alignment with the lifting rod 32 and shear-resistant connected.
  • the drive shaft 23 is mounted axially and radially in the support structure 19. In this way, the drive for the upper feed dog assembly 13 is fixed to the support structure 19.
  • the support body 40 is between an upper stroke position, which corresponds to a raised upper feed dog 16, 17 and z. B. in the Fig. 3 is shown, and a lower stroke position corresponding to the lowered upper feed dog 16, 17 and in the Fig. 2 is shown pivotable about a pivot axis 41 relative to the support structure 19.
  • the stroke drive motor 26 is controlled as a function of the position of the needle bar 9 detected via the needle drive, namely via the position transmitter connected to the arm shaft 6. This will be explained below with reference to Fig. 8 described.
  • the latter shows a sewing cycle, which is divided into six time slices I to VI.
  • the sum of the lengths of the first five time slices I to V is equal to the length of the time slice VI.
  • the needle 10 is in a lowered position in which the needle is in the sewing material.
  • the time slice VI the needle 10 is in a raised position relative to the fabric.
  • the time slices I to VI define a complete revolution of the arm shaft 6 and simultaneously a complete stroke cycle of the upper feed dog 16, 17.
  • the windings of the linear motor 26 with a first accelerating current to initiate a stroke of the lifting rod 32 upwards for lifting the upper Feed dog 16, 17 energized. Due to the effect of the first accelerating flow, the lifting rod 32 begins to lift as shown in the path diagram. Subsequently, during the time slice II, the windings are energized with a first braking current directed counter to the first accelerating current. Due to the braking current, the lifting movement of the lifting rod 32 is slowed down, as shown in the path diagram until it stops in the maximum raised position of the feed dog 16, 17 at the end of the time slice II.
  • Fig. 8 In the Fig. 8 above is a current-time diagram showing the time course of current (I / t) and below a path-time diagram showing the time course (z / t) is shown.
  • the windings of the linear motor 26 are energized with a holding current whose current is lower than that of the first acceleration current. This current is sufficient to secure the position of the moving unit in the linear motor 26 between the inner core and the stator unit.
  • the lifting rod 32 therefore remains in the raised position during the time slice II.
  • the windings of the linear motor 26 are energized with a second acceleration current directed counter to the first acceleration current for initiating a counter-stroke for lowering the lifting rod 32 and thus the upper feed dog 16, 17.
  • the lifting rod 32 begins during the time slice IV with the lowering.
  • the windings are supplied with a second braking current directed in the opposite direction in the second acceleration current.
  • a loud impact of the two feed dog assemblies 12, 13 on each other is thereby avoided.
  • the second braking current is dimensioned so that the upper feed dog 16, 17 comes to a standstill in the maximum lowered position.
  • the windings of the linear motor 26 are energized with a holding current directed in the direction of the second acceleration current whose current intensity is lower than that of the second acceleration current. As a result, the upper feed dog 16, 17 is secured in the maximum lowered position.
  • the sewing material can be readjusted in its orientation with respect to the conveyor belts 14 to 17. Since when the upper feed dog 16, 17 are lifted from the lower feed slide assembly 12, the needle 10 is located in the fabric, it is prevented that the two sewing material to be sewn in this alignment relative to each other and relative to the stitch position are moved undesirable. It's strictly a turn the two sewing material to be sewn together around the needle 10 possible.
  • the stroke drive motor 26 is independent of the drive motor 7.
  • the push / pull rod 28 represents a drive rod of the stroke drive motor 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Sewing Machines And Sewing (AREA)
EP07013752A 2006-09-08 2007-07-13 Nähmaschine zum Vernähen zweier Nähgutteile unter Einarbeitung von Mehrweite Active EP1897985B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006042332A DE102006042332A1 (de) 2006-09-08 2006-09-08 Nähmaschine zum Vernähen zweier Nähgutteile unter Einarbeitung von Mehrweite

Publications (3)

Publication Number Publication Date
EP1897985A2 EP1897985A2 (de) 2008-03-12
EP1897985A3 EP1897985A3 (de) 2010-11-24
EP1897985B1 true EP1897985B1 (de) 2012-02-29

Family

ID=38806277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07013752A Active EP1897985B1 (de) 2006-09-08 2007-07-13 Nähmaschine zum Vernähen zweier Nähgutteile unter Einarbeitung von Mehrweite

Country Status (5)

Country Link
EP (1) EP1897985B1 (zh)
JP (1) JP2008062055A (zh)
KR (1) KR20080023118A (zh)
CN (1) CN101139782A (zh)
DE (1) DE102006042332A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009089833A (ja) 2007-10-05 2009-04-30 Juki Corp ミシンの布送り装置
DE102008030797A1 (de) 2008-06-28 2009-12-31 Dürkopp Adler AG Nähmaschine sowie Verfahren zum Betrieb einer derartigen Nähmaschine
DE102011052521B4 (de) 2011-08-09 2023-02-23 Chee Siang Industrial Co., Ltd. Säulennähmaschine
CN103074743A (zh) * 2013-01-30 2013-05-01 台州市佳静衣车有限公司 一种裘皮机
CN105063899B (zh) * 2015-08-04 2018-01-30 江苏天淼软件开发有限公司 一种编织物自动缝合机上的卷布装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3216996A1 (de) * 1982-05-06 1983-11-10 Kochs Adler Ag, 4800 Bielefeld Naehmaschine mit einer vorschubeinrichtung fuer das zu naehende werkstueck
DE8213129U1 (de) * 1982-05-06 1984-08-16 Kochs Adler Ag, 4800 Bielefeld Naehmaschine mit einer vorschubeinrichtung fuer das zu naehende werkstueck
DE19906433A1 (de) * 1999-02-12 2000-08-17 Hartmut Huelshoff Näh- oder Stickmaschine
DE19827846C2 (de) * 1998-06-23 2001-05-31 Frankl & Kirchner Antrieb für eine Nähmaschine, insbesondere eine Industrienähmaschine
DE10025822C5 (de) * 2000-05-25 2008-09-18 Quick Rotan Elektromotoren Gmbh Vorrichtung zum Transportieren von Nähgut
JP4509491B2 (ja) * 2003-04-21 2010-07-21 Ｊｕｋｉ株式会社 差動送りミシン
DE202004013438U1 (de) * 2004-08-27 2004-10-21 Chee Siang Industrial Co., Ltd., Wu Ku Hsiang Säulennähmaschine

Also Published As

Publication number Publication date
KR20080023118A (ko) 2008-03-12
EP1897985A2 (de) 2008-03-12
JP2008062055A (ja) 2008-03-21
EP1897985A3 (de) 2010-11-24
DE102006042332A1 (de) 2008-03-27
CN101139782A (zh) 2008-03-12

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