EP3399088A1 - Module de production et machine à coudre pour produire un début de fil supérieur de couture dépassant d'une valeur de consigne - Google Patents

Module de production et machine à coudre pour produire un début de fil supérieur de couture dépassant d'une valeur de consigne Download PDF

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Publication number
EP3399088A1
EP3399088A1 EP18167987.9A EP18167987A EP3399088A1 EP 3399088 A1 EP3399088 A1 EP 3399088A1 EP 18167987 A EP18167987 A EP 18167987A EP 3399088 A1 EP3399088 A1 EP 3399088A1
Authority
EP
European Patent Office
Prior art keywords
upper thread
thread
knife
seam
assembly
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
EP18167987.9A
Other languages
German (de)
English (en)
Other versions
EP3399088B1 (fr
Inventor
Florian Schulz
Johann Enns
Frank Breder
Annelie Lückenbach
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 EP3399088A1 publication Critical patent/EP3399088A1/fr
Application granted granted Critical
Publication of EP3399088B1 publication Critical patent/EP3399088B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D05B65/02—Devices for severing the needle or lower thread controlled by the sewing mechanisms
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D05B65/06—Devices for severing the needle or lower thread and for disposing of the severed thread end ; Catching or wiping devices for the severed thread
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread

Definitions

  • the invention relates to an assembly for producing a seam beginning upper thread with a nominal seam projection of at most 10 mm. Furthermore, the invention relates to a sewing machine with such an assembly.
  • Sewing machines are known from the EP 1 847 641 B1 , of the DE 102 34 251 C1 , of the DE 10 2006 019 193 A1 and the DE 101 23 075 C1 ,
  • the DE 10 2015 223 194 B3 describes a method for creating a suture start upper thread with short target seam projection as well as an assembly for performing the method.
  • the DE 34 34 40 874 A1 discloses a thread cutting apparatus for a sewing machine.
  • the US 6 062 152 A discloses an automatic thread cutting device for an embroidery machine.
  • the DE 38 12 092 C2 discloses a buttonhole sewing machine with a thread separating and clamping device.
  • the DE 100 63 003 B4 describes a thread cutter for a sewing machine.
  • the DE 197 19 847 A1 a thread trimming device describes a sewing machine.
  • the DE 10 2006 059 192 A1 discloses a Fadenabtrennvortechnisch a sewing machine.
  • the DE 298 11 472 U1 discloses a thread cutting apparatus for a sewing machine for chainstitch sewing.
  • the DE 10 2007 056 132 A1 discloses a sewing machine with a thread trimming mechanism.
  • the DE 100 55 258 C1 discloses a thread trimmer for use in a rotary gripper sewing machine.
  • an upper thread detecting portion of an upper thread knife can be used simultaneously for clamping a seam starting top thread and also for shearing the seam starting top thread to produce a defined short sewing start top thread.
  • a compact assembly which on the one hand ensures clamping and on the other hand cutting of the top thread, is thus made possible.
  • the counter knife can simultaneously represent the upper thread clamp. Alternatively, it is possible to perform the upper thread clamp as a separate part to the counter blade.
  • the counter knife can be arranged frame-fixed. Alternatively, it is possible for the counter knife to move relative to a frame of the sewing machine during cutting.
  • the upper thread detection position, the upper thread clamping position and the upper thread cutting position are different positions of the upper thread detection portion from each other.
  • the upper thread-clamping position may be a position of the upper-thread-detecting portion located between the upper-thread-detecting position on the one hand and the upper-thread cutting position on the other.
  • a displacement drive according to claim 2 is inexpensive.
  • a displacement drive according to claim 3 is precise.
  • the displacement drive can be designed as a lifting cylinder and in particular as a pneumatic lifting cylinder.
  • the displacement drive can be designed as a stepper motor.
  • This stepping motor can be driven with a corresponding control so that the three positions of the upper thread detecting portion correspond to corresponding step positions of the stepping motor.
  • a stepper motor design can be dispensed with stops for setting the position.
  • An adjustable clamp stop according to claim 4 simplifies the manufacture of the assembly.
  • a clamping position stop according to claim 5 is inexpensive to manufacture. Self-locking can be achieved in that the threaded pin is screwed into a frame-fixed plastic body.
  • An adjustable cutting fence according to claim 6 simplifies the manufacture of the assembly.
  • An abutment body according to claim 7 allows a precise adjustment of the cutting position stop, wherein a force which is absorbed by the cutting position stop, does not act in the direction of displacement of the stop body, which could lead to an undesirable slippage of the stop.
  • a suction device avoids undefined deposition of portions of the upper thread. This avoids that undesirable cut thread remnants accumulate in the sewing machine.
  • a sewing machine 1 in particular designed as a lockstitch sewing machine, has a base plate 2 with an upwardly extending stand 3 and an angled arm 4. The latter ends in a head 5.
  • an arm shaft 6 is rotatably mounted.
  • This drives in the head 5 a crank mechanism 7 with a thread lever 8 at.
  • the crank mechanism 7 is drivingly connected to a needle bar 9 mounted axially displaceably in the head 5. This has at its lower end a needle 10.
  • the needle 10 is moved up and down by the crank mechanism 7 on a vertical axis 11.
  • a Cartesian xyz coordinate system is used below.
  • the vertical axis 11 extends along the z-direction of this coordinate system.
  • the x-direction is perpendicular to the plane of the Fig. 1 into it and runs parallel to a sewing direction of the sewing machine 1.
  • the y-direction runs in the Fig. 1 to the left.
  • the needle 10 leads in an eye from a coil 12 via a thread tensioning device and the thread lever 8 supplied needle thread 13, which is also referred to as needle thread.
  • the needle thread 13 has a free upper thread starting section 13a.
  • the base plate 2 carries a screw-mounted support plate 14, on which a workpiece 15 rests.
  • the support plate 14 is provided with a recess formed for the passage of a lower feed dog 17.
  • the latter has a tap hole 18 for the passage of the needle 10.
  • the feed dog 17 is in a known manner in drive connection with a arranged below the base plate 2 thrust and screw jack.
  • a gripper 19 having a gripper body 20 with a gripper tip 21.
  • a cup-shaped coil housing 22 for receiving a looper thread supply in the form of a coil 22a is mounted in the gripper body 20 in the gripper body 20, a cup-shaped coil housing 22 for receiving a looper thread supply in the form of a coil 22a is mounted in the gripper body 20, a cup-shaped coil housing 22 for receiving a looper thread supply in the form of a coil 22a is mounted.
  • Upper edge contours on the one hand of the coil housing 22 and on the other hand of the coil 22a are in the schematic representation after Fig. 2 indicated by dashed lines.
  • the looper thread is also called bobbin thread.
  • the gripper 19 is rotatable about a vertical, in the z-direction gripper axis 23.
  • a sewing operation direction of rotation 24 of the gripper body 20 extends in Fig. 3 clockwise about the gripper axis 23.
  • the gripper body 20 is fixedly connected to a shaft 25 which is coaxial with the gripper axis 23.
  • the shaft 25 is rotatably mounted in a bearing block 26 screwed to the base plate 2.
  • a drive shaft 27 is mounted, which is connected to a arranged in the interior of the bearing block 26 gear transmission.
  • the gear transmission has a gear ratio of 1: 2, so that in one revolution of the drive shaft 27 located on the shaft 25 gripper body 20 rotates twice.
  • the drive shaft 27 is drivingly connected to the arm shaft 6 via a belt drive 28.
  • a thread-pulling knife 29 for example, from the EP 1 847 641 B1 is known.
  • the sewing machine 1 For holding and transporting the workpiece part 15, the sewing machine 1 additionally has a presser foot 30 and an upper feed dog 31, which cooperates with the lower feed dog 17 for the material to be transported.
  • the schematic FIG. 2 also shows a course of the upper thread 13 from the spool 12 to the upper thread starting portion 13 a.
  • the upper thread 13 is guided starting from the spool 12 via a thread tensioning device 32 and the thread lever 8 and an upper thread guide clamp 33 toward the needle 10.
  • the upper thread guide clamp 33 has a tension pulley 34 which is fixed to a guide rod 35. Via a compression spring 36, the clamping plate 34 is pulled against a housing-fixed abutment 37 of the upper thread guide clamp 33 for clamping the upper thread 13.
  • abutment 37 At the abutment 37 is an in the Fig. 2 schematically illustrated solenoid 38 attached, which is controlled via a central control device 39 of the sewing machine 1 in a manner not shown.
  • the assembly 40 Seen in relation to an xz-plane in which the movement axis 11 of the sewing needle 10 is located, the assembly 40 is disposed on a side opposite the gripper 19 side of this xz plane (see. Fig. 1 and 3 ).
  • the assembly 40 has an upper thread catcher 41 for detecting a seam-starting upper thread at the beginning of a seam to be sewn with the needle thread 13.
  • the upper thread catcher 41 has an upper thread knife 42 (cf., for example Fig. 5
  • the upper thread catcher 41 further has a counter knife 44, which cooperates with the upper thread knife 42 for cutting off the needle thread 13.
  • the counter knife 44 is fixed to a frame of the sewing machine 1.
  • the upper thread catcher 41 has a needle thread clamp 45.
  • the latter is designed as a U-shaped clamping spring.
  • a contact pressure of the clamping spring 45 against the upper thread knife 42 can be adjusted via a clamping spring adjusting screw 46.
  • a knife pressure that is, a contact pressure of the counter knife 44 against the upper thread knife 42, can be adjusted by means of a knife adjusting screw 47.
  • the upper thread detection position is in the 4 to 6 shown.
  • the upper thread clamping position is in the Fig. 7 to 11 shown.
  • the upper thread cutting position is in the Fig. 12 to 15 shown.
  • the upper thread detection position, the upper thread clamping position and the upper thread cutting position are mutually different positions of the upper thread detection portion 43. These three positions can be specified with the displacement drive 48, ie with exactly one drive.
  • a linear guide performs a displacement movement of the upper thread detecting portion 43 between the three positions mentioned.
  • the linear guide comprises a guide pin 49, which extends approximately in the z-direction and is attached to a connecting piston 50, which is connected to a piston rod 51 of the lifting cylinder 48 in a manner that is tensile.
  • the guide pin 49 acts to guide the displacement movement of the upper thread detection portion 43 with a slot 52 in a mounting plate 53 of the assembly 40 together (see, eg 4 and 5 ).
  • the upper thread knife 42 is attached to the guide pin 49.
  • the upper thread knife 42 In the upper thread detection position, the upper thread knife 42 is extended relative to the counter knife 44 so far in the negative y direction that the upper thread detection portion 43 completely over the upper thread knife 42 and the upper thread clamp 45 projects and is freely accessible to the passage of the needle 10.
  • An adjustable clamping position stop serves to predetermine a relative position of the upper thread knife 42 to the upper thread clamp 45 in the upper thread clamping position.
  • the clamping position stop includes a threaded pin 54 which is screwed into a plastic body 55.
  • a self-locking design of the threaded pin 54 is given.
  • the threaded pin 54 is rotated correspondingly relative to the plastic body 55.
  • the threaded pin 54 via a passage opening 56 (see. Fig. 8 ) accessible in a drive carrier plate 57 from the outside.
  • the clamping position stop is between a particular in the Fig. 7 shown stop position and an inoperative neutral position displaced. This neutral position is for example in the FIG. 12 shown.
  • This neutral position is for example in the FIG. 12 shown.
  • a Klemmanschlagsantrieb 58 which is also designed as a pneumatic lifting cylinder.
  • the plastic body 55 is connected to the Klemmanschlagsantrieb 58 via the piston rod 59.
  • the clamping stop drive 58 is also mounted on the drive carrier plate 57.
  • the drive carrier plate 57 is bent in an L-shape with the upper thread detecting portion displacement driver 48 mounted on a first leg and the clamping stopper drive 58 on a second leg of this L-shape.
  • a displacement movement by the Klemmanschlagsantrieb 58 takes place approximately perpendicular to the displacement movement by the displacement drive 48th
  • the assembly 40 further has an adjustable cutting position stop for specifying a relative position of the upper thread knife 42 to the counter knife 44 in the upper thread cutting position.
  • the cutting position stop has a stop body 60, which is supported by a stop plate (cf. FIGS. 12 and 13 ) is formed. The latter in turn interacts with the guide pin 49 of the assembly 40 in the cutting stop position of the cutting position stop.
  • a contact between the guide pin 49 and the stop plate 60 takes place in the region of an inclined wall portion 61 of the stop plate 60, ie in the region of Edge section, the in the supervision to Fig. 13 makes an angle to the x-axis or to the sewing direction.
  • a relative position of the stop plate 60 to the mounting plate 53 can be specified via a mounting connection, which has an adjusting screw 62, which extends through an oblong hole 63 running in the stop plate 60 along the x direction (cf. Fig. 13 ).
  • the stop plate 60 is displaced along the x-direction after corresponding release of the adjustment screw 62, so that a contact area between the guide pin 49 and the inclined wall portion 61 moves along the y-direction in the cutting stop position.
  • a relative position of the upper thread knife 42 to the counter knife 44 of the stop body 60 is transversely to a cutting direction of movement of the upper thread knife 42, ie transversely to the y-direction, displaced.
  • the cutting fence stops when the clamp stop has moved to the neutral position.
  • the assembly 40 further has a suction device 64 for sucking off a portion of the upper thread 13 cut with the upper thread knife 42.
  • the suction device 64 has a suction tube 65 with a suction end, which extends below a cut-off region 65a between the Upper thread knife 42 and the counter knife 44 opens (see. Fig. 12 ).
  • An opposite end 66 of the suction tube 65 is connected to a vacuum source, not shown, of the suction device 64 in connection.
  • the upper thread-detecting position of the upper thread detecting portion 43 For producing the seam-starting upper thread having the target seam projection of at most 10 mm, in the upper thread-detecting position of the upper thread detecting portion 43, first, a portion of the needle thread 13 is transported from a cloth upper side toward a lower side of the sewing material 15, the needle 10 passes through the opening of the upper thread detecting portion 43. Subsequently, the upper thread starting section 13a is pulled out with the gripper 19 until the entire upper thread starting section 13a lies below the lower side of the sewing material 15. After a first short stitch, when the thread lever 8 is in the region of the top dead center, the upper thread detecting section 43 is moved from the upper thread detecting position to the upper thread tightening position by operating the displacement drive 48.
  • the seam is then further sewn with normal stitch length.
  • a stitch length specification is carried out with the aid of the control device 39.
  • the further seam can be formed with the involvement of the upper thread 13 and the lower thread not shown as a lockstitch seam.
  • a thread trimming operation of the upper thread 13 and the lower thread with the thread-pulling knife 29 then takes place.
  • Fig. 16 shows a seam 67 created with the sewing assembly 40 in a seam beginning section.
  • the sewing direction runs along the x-direction in the Fig. 6 to the left. Due to the upper thread portion between the upper thread knife 42 and the counter knife 44, the upper thread starting portion 13a at the beginning of the seam 67 is so short that a maximum seam protrusion A of 10 mm results.
  • the displacement drive 48 can also be designed as a stepping motor, wherein the different positions of the upper thread detection section 43 then correspond to different step positions of the stepping motor. These different step positions can be specified via the control device 39.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP18167987.9A 2017-05-05 2018-04-18 Module de production et machine à coudre pour produire un début de fil supérieur de couture dépassant d'une valeur de consigne Active EP3399088B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017207627.5A DE102017207627A1 (de) 2017-05-05 2017-05-05 Baugruppe zum Erzeugen eines Naht-Anfangsoberfadens mit einem Soll-Nahtüberstand

Publications (2)

Publication Number Publication Date
EP3399088A1 true EP3399088A1 (fr) 2018-11-07
EP3399088B1 EP3399088B1 (fr) 2021-10-20

Family

ID=62025709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18167987.9A Active EP3399088B1 (fr) 2017-05-05 2018-04-18 Module de production et machine à coudre pour produire un début de fil supérieur de couture dépassant d'une valeur de consigne

Country Status (5)

Country Link
EP (1) EP3399088B1 (fr)
KR (1) KR102496909B1 (fr)
CN (1) CN108796855B (fr)
DE (1) DE102017207627A1 (fr)
TW (1) TWI788349B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202019102567U1 (de) * 2019-05-08 2020-08-11 Dürkopp Adler AG Nähmaschine sowie Gegenmesser-Baugruppe für eine Maschine

Citations (5)

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Publication number Priority date Publication date Assignee Title
US20050178307A1 (en) * 2002-03-06 2005-08-18 Frazer James T. Multiple horizontal needle quilting machine and method
EP2206820A1 (fr) * 2009-01-09 2010-07-14 Dürkopp Adler AG Dispositif à couper le fil
CH704524A1 (de) * 2011-02-28 2012-08-31 Bernina Int Ag Verfahren zum Schneiden des Unter- und mindestens eines Oberfadens und ein Verfahren zum Ansticken sowie eine Vorrichtung zur Durchführung der Verfahren.
DE102016102024A1 (de) * 2015-02-06 2016-08-11 Juki Corporation Nähmaschine
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

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US4630559A (en) * 1984-11-08 1986-12-23 Tokyo Juki Industrial Co., Ltd. Thread cutting mechanism in lock stitch sewing machine
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DE19531727C2 (de) * 1994-10-13 1999-09-30 Duerkopp Adler Ag Fadenabschneidvorrichtung für eine Nähmaschine
JP3667440B2 (ja) * 1996-05-11 2005-07-06 ジューキ株式会社 ミシンの糸切り装置
US5870962A (en) * 1997-11-12 1999-02-16 Ku; Fei-Lung Thread cutting device for a sewing machine of chain sewing
US6062152A (en) * 1998-05-12 2000-05-16 Capital Automation Co., Ltd. Automatic thread cutting device for an embroidery machine
JP4686025B2 (ja) * 1999-12-16 2011-05-18 Ｊｕｋｉ株式会社 ミシンの糸切り装置
DE10055258C1 (de) * 2000-11-08 2002-03-07 Viking Sewing Machines Ab Husk Fadenabschneider
DE10123075C1 (de) * 2001-05-11 2002-10-10 Duerkopp Adler Ag Doppelsteppstichnähmaschine mit einer Fadenabschneidvorrichtung
DE10136543C1 (de) * 2001-07-26 2002-07-18 Duerkopp Adler Ag Nähmaschine, insbesondere Knopfloch-Nähmaschine, mit einer Nadelfaden-Klemm- und -Schneid-Einrichtung
DE10234251C1 (de) * 2002-07-27 2003-10-09 Duerkopp Adler Ag Verfahren zum Ziehen des freien Fadenendes eines Nadelfadens von der Oberseite eines Nähgutteils auf dessen Unterseite und Nähmaschine zur Durchführung des Verfahrens
JP5095101B2 (ja) * 2005-12-16 2012-12-12 Ｊｕｋｉ株式会社 ミシンの糸切り装置
DE102006019193A1 (de) * 2006-04-21 2007-10-25 Dürkopp Adler AG Doppelsteppstichnähmaschine
DE202006009410U1 (de) * 2006-04-21 2007-08-30 Dürkopp Adler AG Fadenziehmesser für eine Nähmaschine
JP5073272B2 (ja) * 2006-11-17 2012-11-14 Ｊｕｋｉ株式会社 ミシン
JP4337063B2 (ja) * 2007-02-08 2009-09-30 ヤマトミシン製造株式会社 糸切り装置付きミシン
JP2008212442A (ja) * 2007-03-06 2008-09-18 Brother Ind Ltd ミシン
KR101364558B1 (ko) * 2007-06-26 2014-02-18 주식회사 썬스타 재봉기의 윗실 사절 및 홀딩장치
JP5321938B2 (ja) * 2007-10-29 2013-10-23 ヤマトミシン製造株式会社 ミシンの糸切り装置
DE102009004218A1 (de) * 2009-01-09 2010-07-15 Dürkopp Adler AG Fadenschneidvorrichtung für eine Nähmaschine
DE102012205049A1 (de) * 2012-03-29 2013-10-02 Dürkopp Adler AG Faden-Schneid-Baugruppe für eine Schnürloch-Nähmaschine
JP6560913B2 (ja) * 2015-06-26 2019-08-14 Juki株式会社 ミシン

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050178307A1 (en) * 2002-03-06 2005-08-18 Frazer James T. Multiple horizontal needle quilting machine and method
EP2206820A1 (fr) * 2009-01-09 2010-07-14 Dürkopp Adler AG Dispositif à couper le fil
CH704524A1 (de) * 2011-02-28 2012-08-31 Bernina Int Ag Verfahren zum Schneiden des Unter- und mindestens eines Oberfadens und ein Verfahren zum Ansticken sowie eine Vorrichtung zur Durchführung der Verfahren.
DE102016102024A1 (de) * 2015-02-06 2016-08-11 Juki Corporation Nähmaschine
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

Also Published As

Publication number Publication date
EP3399088B1 (fr) 2021-10-20
TWI788349B (zh) 2023-01-01
DE102017207627A1 (de) 2018-11-08
CN108796855B (zh) 2022-05-10
CN108796855A (zh) 2018-11-13
KR20180122949A (ko) 2018-11-14
TW201843370A (zh) 2018-12-16
KR102496909B1 (ko) 2023-02-06

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