EP2290142A2 - Machine à coudre - Google Patents

Machine à coudre Download PDF

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Publication number
EP2290142A2
EP2290142A2 EP10169319A EP10169319A EP2290142A2 EP 2290142 A2 EP2290142 A2 EP 2290142A2 EP 10169319 A EP10169319 A EP 10169319A EP 10169319 A EP10169319 A EP 10169319A EP 2290142 A2 EP2290142 A2 EP 2290142A2
Authority
EP
European Patent Office
Prior art keywords
sewing machine
fadenabschneidemesser
machine according
transmission mechanism
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
EP10169319A
Other languages
German (de)
English (en)
Other versions
EP2290142B1 (fr
EP2290142A3 (fr
Inventor
Pavel Vybihal
Eduard Dipl.-Ing. Dokoupil
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 EP2290142A2 publication Critical patent/EP2290142A2/fr
Publication of EP2290142A3 publication Critical patent/EP2290142A3/fr
Application granted granted Critical
Publication of EP2290142B1 publication Critical patent/EP2290142B1/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
    • D05B27/00—Work-feeding means
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread

Definitions

  • the invention relates to a sewing machine with a needle bar and a feed dog.
  • a pull rod for actuating a thread trimming knife or thread pulling knife can be used simultaneously for supporting a bearing body of a feed dog transmission mechanism.
  • the fact that the pull rod moves during the thread trimming does not disturb this dual function, since during this period a sewing operation does not take place anyway.
  • a separate storage bar for the bearing body of the feed dog transmission mechanism can then be omitted.
  • the housing of the sewing machine in particular a free arm of this, be made very compact in this case. This makes it possible to design the housing of the sewing machine so that even complicated sewing tasks can be solved in hard to reach areas of fabric.
  • a housing or frame-mounted fuse body of the bearing body can be secured against displacement during a displacement of the pull rod so that the feed dog transfer mechanism remains stationary upon actuation of the thread cutting knife transfer mechanism.
  • the connection of the bearing body of the feed dog transmission mechanism so with the pull rod of Fadenabschneidemesser transmission mechanism that the bearing body remains axially in position with an axial displacement of the drawbar Fadenabschneidmesser transmission mechanism with respect to a sewing machine housing causes an operation of the Fadenabschneidemessers of a Nähguttransport by the Feed dog can be decoupled.
  • the bearing body may be in the form of an actuating lever, which is connected via a joint with a hinge axis with a feed dog carrier.
  • the sewing machine according to the invention need not already be equipped with a complete thread trimming device.
  • the sewing machine according to claim 2 is equipped with a thread trimming device, which extends the functionality of the sewing machine.
  • the drawbar can be displaced by a drive for thread trimming over the Fadenabschneidemesser transmission mechanism.
  • the displacement drive can be designed as a pneumatic drive, as a stepper motor or as a controllable solenoid.
  • a Fadenabschneidemesser actuator allows a specification of a position of the Fadenabschneidemessers relative to the position of stitch forming components of the sewing machine, in particular an adjustment of the Fadenabschneidemessers transverse to the sewing direction.
  • a housing or frame-fixed feed dog actuator according to claim 4 allows the specification of a position of the transporter displaceable over the feed dog transmission mechanism relative to the stitch forming components of the sewing machine, in particular an adjustment of the transporter transverse to the sewing direction.
  • a common storage unit allows a common adjustment of the gripper and Fadenabschneidemessers. This can be done with the help of Fadenabschneidemesser actuator, which then has the same function as a gripper actuator.
  • the gripper may be a vertical gripper, ie a gripper rotating about a vertical axis.
  • a gripper-fixed counter knife according to claim 6 can be specified in its position together with the due to the common storage with the gripper also gripper-proof thread cutting over the displacement of the Fadenabschneidemesser-adjusting element. After a displacement of the Fadenabschneidemesser adjusting element, therefore, a relative positioning of the Fadenabschneidemessers be dispensable for counter knife.
  • a free-arm sewing machine In a free-arm sewing machine according to claim 7, the advantages of a stitching area compact sewing machine housing come particularly well to bear.
  • the free arm may allow, for example, the coating of a tubular material.
  • a two-needle sewing machine according to claim 8 can be used in particular in the round or pipe filter production.
  • Two thread trimming devices according to claim 9 increase the functionality of the two-needle sewing machine.
  • Two Fadenabschneidemesser adjusting elements according to claim 10 allow independent specification of the positions of the two Fadenabschneidemesser. Also in this case, the Fadenabschneidemesser and the associated gripper of the two-needle sewing machine can be mounted on a respective common bearing unit. In this way, a simple distance adjustment of the gripper can be accomplished to each other on the Fadenabschneidemesser adjusting elements, which then have the same function of gripper actuators.
  • a free-arm sewing machine 1 has a base plate 2 with an upwardly extending therefrom stand 3 and an angled arm 4.
  • the arm 4 opposite part of the base plate 2 is formed as a free arm 5, so that the sewing machine 1, for example, for piping, quilting and assembly work z. B. on bags and suitcases can be used.
  • the free arm 5, which is free to all directions across the arm direction, allows tubular material to pull over this, so that reached with conventional C-shaped sewing machines inaccessible sewing areas and there, for example, circumferential seams can be generated.
  • the upper arm 4 ends in a head 6.
  • a crank mechanism with a thread lever This drives in the head 6 a crank mechanism with a thread lever.
  • the crank mechanism is drivingly with a needle bar axially slidably mounted in the head 6 8 in connection.
  • This carries at its lower end a needle 9.
  • the needle 9 is by the crank mechanism along a vertical axis 10 (see. Fig. 2 ) movable up and down.
  • the needle 9 leads in an eye from a spool via a thread tensioning device 11 and the thread lever supplied needle thread.
  • An upper side of the free arm 5 is designed as a support plate 12 for supporting sewing material (cf. Fig. 2 ).
  • the support plate 12 is divided into a throat plate part 13 and a needle plate slide 14.
  • the throat plate part 13 is fixedly mounted to a housing 15 of the sewing machine 1.
  • the needle plate slide 14 can after loosening a locking spring 16 (see. Fig. 2 ) in the Fig. 2 be moved to the right and then makes available under the throat plate 14 arranged components.
  • the throat plate part 13 is formed in a stitch area of the needle 9 with a recess 17 for the passage of a lower material conveyer or feed dog 18.
  • the lower fabric feed 18 has a tap hole 19 for the passage of the needle 9.
  • the lower material feed dog 18 acts to transport the material in a material to be conveyed, which is perpendicular to the planes of the Fig. 1 and 2 lies and points into this, with an upper fabric feed 20 together.
  • the lower material feed conveyor 18 carries out a transport movement along the material to be conveyed in the sewing operation, which is driven by a rotary arm movement 7, which is accommodated in the free arm 5 and is derived from the rotational movement of the arm shaft 7.
  • Part of the transporter transmission mechanism 21 is a along the free arm 5 extending feed dog eccentric shaft 22 (see. Fig. 4 ), whose eccentricity E, ie the deviation between a rotational symmetry axis 23 and a bearing axis 24 in the Fig. 5 is apparent.
  • Part of the feed dog transmission mechanism 21 is further a rocking shaft 24 a, which is arranged along the free arm 5.
  • the oscillating shaft 24a is in driving connection via a stitch regulator gear with a lower shaft, not shown, of the sewing machine 1.
  • an oscillating movement of the oscillating shaft 24a is generated about the shaft axis 24b.
  • an adjustable transport stroke is transmitted to a feed dog carrier 26 for the lower fabric feed dog 18.
  • the lower material feed dog 18 is mounted relative to the feed dog carrier 26 vertically displaceable on this.
  • the transfer body 25 the lower material feed conveyor 18 is raised in the respective transport phase of the lower material feed conveyor 18 above the level of the throat plate portion 13.
  • the oscillating movement of the oscillating shaft 24a is transmitted to the feed dog carrier 26 via a movement lever 26a and in this way predefines the transport movement of the feed dog carrier 26, that is to say the stitch length which can be reached in each case during sewing operation.
  • a movement lever 26a About a bearing body in the form of another movement lever 27 of the feed dog carrier 26 is connected to a running along the free arm 5 drawbar 28 a housed in the free arm 5 Fadenabschneidemesser transmission mechanism 29, which will be explained below.
  • the pull rod 28 is arranged parallel to the oscillating shaft 24a. The pull rod 28 extends transversely to the sewing direction.
  • the movement lever 27 is on the one hand about a parallel to the axis 24 extending hinge axis 30 articulated to the feed dog carrier 26 and on the other hand to a drawbar axis 31 hinged to the thread trimming pull rod 28 connected.
  • a swinging movement of the movement lever 27 in the bottom feed operation around the tie rod axis 31 is in the Fig. 4 indicated by a double arrow 32.
  • the adjusting tab 33 has for this purpose a fork part 34 which engages over the movement lever 27 axially on both sides. Axially, the movement lever 27 has a slight play in the fork part 34.
  • the adjusting tab 33 has a fixing part 35 with a fixing screw 36, via which the adjusting tab 33 can be fixed to the housing 15 in a predetermined axial position along the free arm 5. An axial position of the movement lever 27 and thus of the feed dog carrier 26 and of the lower material feed conveyor 18 connected thereto can therefore be predetermined via the axial position of the setting flap 33 which can be predetermined thereby.
  • the thread trimming pull rod 28 is mounted axially displaceable near its free end in a housing-fixed slide bushing 37.
  • the sliding bushing 37 is arranged between the pull rod 28 at the end encompassing the movement lever 27 and a running in the form of an adjustable fork Fadenabschneidemesser actuator 38.
  • the adjustable fork 38 is fixed by two fixing screws 39 on the thread-cutting pull rod 28 and fixed axially thereto. Ends of the fixing screws 39 rest against a milled wall section 40 of the pull rod 28, the axial extent of which defines an axial adjustment range of the adjustable fork 38 along the pull rod 28.
  • the bearing pin 42 is rotatably connected to a transmission lever 43 of the Fadenabschneidemesser-transmission mechanism 29.
  • the transmission lever 43 is in turn rotatably connected to a thread knife bolt 44.
  • the thread knife bolt 44 extends vertically.
  • a bolt axis 45 of the thread diameter bolt 44 is spaced from the bolt axis of the bearing bolt 42.
  • the thread knife bolt 44 is rotatably mounted in a housing-mounted gripper bearing 46 about the pin axis 45. From the gripper bearing 46 is in the Fig. 6 only a section visible.
  • the gripper bearing 46 also serves to support a gripper 47 of the sewing machine 1.
  • the gripper 47 has a gripper body with a gripper tip 48 (see. Fig. 6 ) for detecting the needle thread.
  • the gripper 47 is rotatable about a vertical gripper axis, wherein the rotary drive of the gripper 47 in turn is derived from the movement of the arm shaft 7.
  • Rotationally connected to the thread knife bolt 44 is a thread trimming knife or thread-pulling knife 49, which cooperates for thread trimming with a gripper bearing fixed counter blade 50.
  • the counter knife 50 is fixed to a bearing plate 51.
  • the bearing plate 51 is in turn firmly connected to the gripper bearing 46.
  • the attachment of the movement lever 26a is first solved on the swing shaft 24a. Then, the fixing screw 36 of the adjusting tab 33 is released through the housing window 52 and the adjusting tab 33 can then along a double arrow 54 in the Fig. 2 be relocated. In accordance with this displacement, the movement lever 27, the feed dog carrier 26 and the movement lever 26a also move transversely to the sewing direction, so that an adjustment of the lower material feed conveyor 18 is provided.
  • the two fixing screws 39 can be solved by the housing 53 and it can be 38 then moved axially to the pull rod 28, resulting in a corresponding change in the position of the gripper 47, the fork Fadenabschneidemessers 49 and the counter knife 40 transverse to the sewing direction leads.
  • the thread-cutting pull rod 28 remains in its axial position and then has the function of a support rod for the adjustable fork 38 and the movement lever 27th
  • a pneumatic cylinder not shown in the drawing is actuated, which is a displacement of the drawbar 28 between a rest position and a cutting position along a double arrow 55 in the Fig. 4 causes.
  • a displacement of the drawbar 28 between the rest position and the cutting position can also be achieved via a stepping motor or via a lifting magnet.
  • the displacement of the drawbar 28 from the rest position into the cutting position leads to a corresponding axial displacement of the fork 38 and the entrained bearing bolt 42, due to this movement of the bearing pin 42 of the thread-knife bolt 44 is pivoted in the gripper bearing 36 about the pin axis 45 (see double arrow 56 in FIG of the Fig. 4 ).
  • the result is a corresponding cutting-pivoting movement of the thread knife 49 relative to the counter blade 50, which leads to a cutting of the thread between the two blades 49, 50.
  • the pull rod 28 slides relative to the slide bush 37 on the one hand and to the movement lever 27 on the other hand.
  • the axial displacement of the drawbar 28 of the movement lever 27 remains axially relative to the housing 15 in position, since it is held by the fork portion 34 of the housing-fixed adjusting tab 33.
  • the adjusting tab 33 thus simultaneously represents a securing body for securing an axial position of the movement lever 27 and thus of the lower material-feed conveyor 18 during thread trimming.
  • the pull rod 28 has at the same time the function of a power transmission within a Fadenabschneidemesser-transmission mechanism in the sewing machine 1 and on the other hand, a support function on the one hand for the movement lever 27 and on the other hand for the Fadenabschneidemesser actuator 38th
  • the sewing machine 57 has a common needle bar 58 with a support body 59 for two not shown in the drawing sewing needles of the two-needle sewing machine 57.
  • Each of the two sewing needles is assigned its own gripper 47.
  • Each of the two grippers 47 is mounted in a separate gripper bearing 46, wherein in the Fig. 8 which is the there left gripper 47 associated gripper bearing 46 can be seen.
  • the two gripper bearings 46 are separated from each other executed components.
  • the two lower material conveyors 18 of the sewing machine 57 are connected to the feed dog carrier 26.
  • the latter and the structure of the feed dog transmission mechanism 21 correspond to the structure of these components in the sewing machine 1 after the Fig. 1 to 6 ,
  • Each of the two needles of the sewing machine 57 has a Fadenabschneidemesser associated with this.
  • the thread trimming knife 49 and associated trimming knife transfer mechanism 29 are the same as above in connection with the sewing machine 1 after the Fig. 1 to 6 was explained.
  • the pull rod 28 is extended beyond the position of the movement lever 27 and has at its free end another adjustable fork 38 ', which belongs to another Fadenabschneidemesser-transfer mechanism 29 for the second thread trimming knife 49, the second counter knife 50th interacts.
  • the other adjustable fork 38 ' is along the pull rod 28 in a predetermined axial position via two screws 39 can be fixed, as already explained above in connection with the sewing machine 1.
  • the fixing screws 39 of the other adjustable fork 38 ' is associated with a further housing window 60, via which the fixing screws 39 are accessible from the same side of the sewing machine housing 15 ago as the housing windows 52, 53. By loosening the fixing screw 39 can be in particular the distance between the two Gripper 47 of the sewing machine 57 to each other pretend.
  • the sewing operation and the thread cutting operation of the sewing machine 57 are the same as those already explained above in connection with the sewing machine 1.
  • thread trimming both Fadenabschneidemesser 49 of the sewing machine 57 are simultaneously actuated via the tie rod 28.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP20100169319 2009-08-28 2010-07-13 Machine à coudre Active EP2290142B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910039252 DE102009039252A1 (de) 2009-08-28 2009-08-28 Nähmaschine

Publications (3)

Publication Number Publication Date
EP2290142A2 true EP2290142A2 (fr) 2011-03-02
EP2290142A3 EP2290142A3 (fr) 2012-08-29
EP2290142B1 EP2290142B1 (fr) 2014-05-21

Family

ID=43431786

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100169319 Active EP2290142B1 (fr) 2009-08-28 2010-07-13 Machine à coudre

Country Status (5)

Country Link
EP (1) EP2290142B1 (fr)
KR (1) KR101757919B1 (fr)
CN (1) CN102002826B (fr)
DE (1) DE102009039252A1 (fr)
TW (1) TWI515347B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110878451A (zh) * 2019-12-06 2020-03-13 拓卡奔马机电科技有限公司 针板结构及缝纫机

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017207626A1 (de) * 2017-05-05 2018-11-08 Dürkopp Adler AG Verfahren zum Erzeugen eines Naht-Endunterfadens mit vorgegebenem Soll-Nahtüberstand
CN109652931B (zh) * 2019-02-28 2020-09-04 杰克缝纫机股份有限公司 一种缝纫机及其剪线机构
CN109837661B (zh) * 2019-02-28 2021-04-27 杰克缝纫机股份有限公司 一种缝纫机及其剪线机构

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1010830A (en) 1907-07-01 1911-12-05 Metropolitan Sewing Machine Company Thread-cutting atttachment for sewing-machines.
DE10123075C1 (de) 2001-05-11 2002-10-10 Duerkopp Adler Ag Doppelsteppstichnähmaschine mit einer Fadenabschneidvorrichtung

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3303032C2 (de) * 1983-01-29 1985-12-12 Kochs Adler Ag, 4800 Bielefeld Fadenabschneidvorrichtung für eine Doppelsteppstich-Nähmaschine
DE4118008A1 (de) * 1990-11-30 1992-06-11 Pfaff Ag G M Verfahren und vorrichtung zum verkuerzen des nadelfadenendes zu naehbeginn bei doppelsteppstich-naehmaschinen
DE19722395C1 (de) * 1997-05-28 1998-08-06 Pfaff Ag G M Nähmaschine mit einer Fadenschneideinrichtung
JP2000024353A (ja) * 1998-07-08 2000-01-25 Brother Ind Ltd ミシン
JP3522557B2 (ja) * 1998-12-18 2004-04-26 ブラザー工業株式会社 ２本針ミシンの送り歯高さ調節機構
DE10025822C5 (de) * 2000-05-25 2008-09-18 Quick Rotan Elektromotoren Gmbh Vorrichtung zum Transportieren von Nähgut
CH697309B1 (de) * 2005-05-09 2008-08-15 Gegauf Fritz Ag Vorrichtung zum Betätigen mehrerer Funktionen einer Nähmaschine.
JP4753159B2 (ja) * 2006-03-17 2011-08-24 ブラザー工業株式会社 ミシン
JP2007282747A (ja) * 2006-04-14 2007-11-01 Juki Corp ミシン
CN101200842B (zh) * 2007-12-14 2012-05-30 郑晶晶 缝纫机压脚送料装置
ES2769237T3 (es) * 2014-01-30 2020-06-25 Nec Corp Terminal máquina a máquina (M2M), estación base, método y medio legible por ordenador

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1010830A (en) 1907-07-01 1911-12-05 Metropolitan Sewing Machine Company Thread-cutting atttachment for sewing-machines.
DE10123075C1 (de) 2001-05-11 2002-10-10 Duerkopp Adler Ag Doppelsteppstichnähmaschine mit einer Fadenabschneidvorrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110878451A (zh) * 2019-12-06 2020-03-13 拓卡奔马机电科技有限公司 针板结构及缝纫机

Also Published As

Publication number Publication date
DE102009039252A1 (de) 2011-03-10
EP2290142B1 (fr) 2014-05-21
TWI515347B (zh) 2016-01-01
KR20110023738A (ko) 2011-03-08
TW201111575A (en) 2011-04-01
CN102002826A (zh) 2011-04-06
CN102002826B (zh) 2014-03-26
EP2290142A3 (fr) 2012-08-29
KR101757919B1 (ko) 2017-07-26

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