EP2666898B1 - Nähmaschine - Google Patents

Nähmaschine Download PDF

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Publication number
EP2666898B1
EP2666898B1 EP13162251.6A EP13162251A EP2666898B1 EP 2666898 B1 EP2666898 B1 EP 2666898B1 EP 13162251 A EP13162251 A EP 13162251A EP 2666898 B1 EP2666898 B1 EP 2666898B1
Authority
EP
European Patent Office
Prior art keywords
feed
feed dog
transport
drive
sewing machine
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
EP13162251.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2666898A1 (de
Inventor
Jakob Harder
Petr Pasek
Christoph Heckner
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
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Filing date
Publication date
Application filed by Duerkopp Adler AG filed Critical Duerkopp Adler AG
Publication of EP2666898A1 publication Critical patent/EP2666898A1/de
Application granted granted Critical
Publication of EP2666898B1 publication Critical patent/EP2666898B1/de
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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
    • D05B27/00—Work-feeding means
    • D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements

Definitions

  • the invention relates to a sewing machine.
  • Sewing machines are by various obvious prior use and also printed by, for example, the EP 2 330 241 A1 known.
  • a transporter mechanism for a sewing machine is known from the US 763,625
  • a sewing machine with a further feed mechanism is known from the US 2,065,885 and the US 2,442,647
  • the DE 37 24 004 A1 describes a sewing machine with a needle bar swing frame.
  • the GB 632,238 discloses a drive of a conveyor for a Nähgut Untertransport.
  • the transporter does not change its distance to the throat plate or only slightly, so that constant transport forces can be transferred from the feed dog to the sewing material.
  • the distance deviation to an extreme distance of the conveyor to the throat plate can not be more than 15% or even more than 10% via the plateau transport path.
  • the plateau transport path may be at least 50% of the distance between the transport start point and the transport end point along the transport direction, at least 60% or even at least 65%.
  • a sewing machine with such a feed dog drive is in particular designed for material thicknesses which are greater than 3 mm, which are greater than 5 mm, which are greater than 10 mm or greater than 20 mm.
  • At least one of the eccentrics allows the derivation of the feed dog motion curve from the drive shaft rotation.
  • a reliable or play-free feed dog movement can be ensured hereby.
  • As the drive shaft an arm shaft of the sewing machine can be used. Two eccentrics have proven to be the default of the feed dog movement curve particularly suitable. It is then possible to decouple the transport stroke specification from the transport length specification, that is to say the specification of the distance between the transport starting point and the transport end point.
  • the support plate for sewing material can be arranged horizontally. As far as the sewing machine has an arm shaft, a needle bar axis may extend perpendicular to an arm shaft axis.
  • the adjustment gear allows a transport length adjustment and thus, for example, a stitch length adjustment of the sewing machine.
  • Such a setting gear can therefore be a Stichstellergetriebe.
  • the distance can be specified continuously.
  • the adjustment gear can also be used to specify a transport direction, so that a reversal of the transport direction between a forward direction and a backward direction is possible, for example, via the adjustment gear.
  • the interaction of at least one of the eccentric with the setting unit combines the advantages of an eccentric with those of the setting gear.
  • the at least one triangle eccentric has been found to be particularly suitable for specifying a movement curve with a plateau transport path according to the invention.
  • the movement curve can be realized with the plateau transport path via a corresponding lever design or backdrop design of the feed dog drive.
  • the triangular eccentric has a four-face counterpart component which is arranged eccentrically to the triangle eccentric component and on which runs the triangular eccentric component.
  • An inner four-surface casing wall of the four-surface counter-component can be designed according to claim 2 in the form of a spherical square.
  • a triangular eccentric of the triangular eccentric may be formed according to claim 3 in the manner of a spherical triangle.
  • a motion profile of the stroke movement can thus be finely specified and adapted to motion design requirements on the one hand and to permissible acceleration limit values on the other hand. It is also possible to adapt to noise requirements and lubrication requirements.
  • the triangular eccentric can be designed so that it can be mounted in exchange for a round eccentric with round eccentric and this eccentric, round counter component.
  • both a triangular eccentric and a round eccentric can be preassembled on the same drive shaft and, depending on the application, can be connected alternately with an associated lever rod on which the eccentric acts, in particular with an associated pull rod.
  • Both eccentrics that is, the eccentric acting on the adjustment of the feed dog drive on the one hand and the eccentric acting on the transport lifting drive on the other hand, can be designed as a triangular eccentric.
  • the exact shape of the movement curve of the at least one transporter can be influenced over a corresponding number of degrees of freedom, so that on the one hand a distance deviation from an extreme distance of the conveyor to the throat plate and on the other hand a proportion of the plateau transport path can be tuned to default values along the entire distance between the transport starting point and the transport end point along the transport direction. It can then reach a given course of the movement curve of the conveyor with the highest possible speed of an arm shaft of the sewing machine become.
  • one of the two eccentrics is designed as a triangular eccentric and the other of the two eccentrics as a round eccentric.
  • a round eccentric is used both in the feed dog drive and in the transport lifting drive
  • an oval drive cam can result.
  • This drive curve can, if the stroke length following via the transport drive and the stroke predefined via the transport lifting drive have the same amount, sew to a circle. With increasing stitch length results in an increasingly elongated oval.
  • Rundexzentern allows in particular high speeds of the cooperating with the eccentric drive shaft.
  • the use of at least one or two triangular eccentrics then results in movement curves of the transporter, which can be almost rectangular or even nearly square.
  • Transporter designs according to claims 6 and 7 are variants which have become established for the transport of textile material. These variants can also be realized in combination with each other and also in combination with a needle transport. It is also possible to use a plurality of bottom feed gate valves and / or several top transport feet for material transport.
  • a stroke of the upper transport foot according to claim 8 enables a secure transport even with thick and / or flexible material.
  • the stroke can also be greater than 10 mm and, for example, 12 mm.
  • Umlenkgetriebe assembly which is additionally designed so that a movement curve of the output component or a mechanically associated with this movement component in a plateau transport path between a movement start point and a movement end point with a distance deviation from an extreme distance of Movement component to a reference component of not more than 20% parallel to this reference component, wherein the plateau transport path is at least 40% of a distance between the movement starting point and the movement end point along a main direction of movement of the movement component, correspond with respect to the movement curve the Advantages which have already been explained above with reference to the movement curve for the feed dog drive according to claim 1.
  • a sewing machine 1 has an upper arm 2, a vertical stand 3 and a lower housing in the form of a base plate 4. In the arm 2, an arm shaft 5 is rotatably mounted.
  • the sewing machine 1 is designed as a machine for sewing very resistant material, such as leather, heavy materials or plastic material in the form of plates.
  • This can be mounted as a direct drive of the arm shaft 5 in the arm 2 or in an arm extension or the arm shaft 5 in particular drive via a belt drive and arranged, for example, under the base plate 4.
  • a needle bar 9 is vertically driven up and down driven.
  • the needle bar 9 carries a sewing needle, not shown.
  • the needle plate 11 has a longitudinal direction along a sewing direction 12 feed gate opening (not shown in detail), which serve for the passage of a sub-transport of material serving conveyor in the form of a feed dog 13 with a feed dog section 14.
  • the feed dog section 14 has a tap hole 15 for the passage of the needle.
  • the feed dog 13 is an example of a movement component, which is driven by means of a Umlenkgetriebe assembly, which will be explained below, driven.
  • the sewing direction 12 represents a direction of movement of this component of motion.
  • a top transport foot 15b also serves.
  • the needle bar 9 is mounted in a needle bar frame 16, which extends around a pivot joint 17 parallel to the arm shaft 5 Pivot axis is pivotable relative to a frame of the sewing machine 1.
  • a gripper assembly is arranged in the base plate 4.
  • a gripper tip of the gripper acts in synchronism with the movement of the needle for stitch formation, whereby a loop of a thread, not shown, is formed by the needle movement, in which the gripper tip engages.
  • a drive movement of the feed dog drive 18 is derived from the arm shaft fifth
  • Fig. 3 shows details of the Stichstellergetriebes 19.
  • the Stichstellergetriebe 19 is a setting gear for specifying in particular a transport length of a conveyor, namely the bottom feed pulley 13th
  • the arm shaft 5 cooperates with two eccentrics 20, 21 connected axially adjacent to the arm shaft 5.
  • the z. B. in the Fig. 2 Exzenter 20 shown on the left which is designed as a triangular eccentric, serves to drive a transport length for the effected by the feed dog 13 bottom feed, so for driving a stitch length.
  • the Indian Fig. 2 shown second eccentric 21, which is designed as a round eccentric, serves to drive a transport movement of the feed dog 13 perpendicular to the level of the throat plate 11, so to the feed dog lifting drive.
  • the eccentric 21 may be designed as a triangular eccentric.
  • the eccentric 20 can be designed as a round eccentric.
  • the triangular eccentric 20 is designed together with a driven-side eccentric lever 22 which is designed as a pull rod, in the Fig. 4 shown in an exploded view.
  • the triangular eccentric 20 has an internal running Triangle eccentric 23, which is mounted on grub screws 24 rotatably mounted on the arm shaft 5.
  • the arm shaft 5 passes through an arm shaft passage opening 25 of the triangle eccentric component 23.
  • Parallel to the arm shaft passage opening 25, the triangle eccentric component 23 has a balancing bore 26.
  • a jacket wall 27 of the triangle eccentric component 23 is in the form of a spherical triangle and threefold about a central longitudinal axis 28 of the triangular eccentric 20 rotationally symmetrical. This longitudinal axis 28 is spaced from an axis of rotation 29 of the arm shaft 5 by an eccentricity E.
  • the jacket wall 27 of the triangular eccentric component 23 runs on a four-surface countercomponent 30 of the triangular eccentric 20.
  • the mating component 30 has an inner four-surface mantle wall 31 which is shaped in the shape of a spherical square.
  • the dimensions of the jacket walls 27, 31 of the components 23, 30 of the triangular eccentric 20 are matched to one another such that the triangular eccentric component 23 can rotate without slipping in the four-surface countercomponent 30.
  • the four-surface counter-component 30 is rotatably connected via a pin 32 with an eye portion 33 of the drawbar 22. Axially, the triangular eccentric 20 is held together by a cover 34 which is screwed by screws 35 with the triangle eccentric component 23.
  • the eccentric lever 22, so the pull rod, is connected via a first link joint with hinge axis 36 with two inner gear levers 37 of the Stichstellergetriebes 19, which are also referred to as Getriebelaschen.
  • a length of this transport movement of the feed dog 13 along the sewing direction 12, that is to say a transport or stitch length, can be predetermined via a gear setting frame 42.
  • This is connected via a transmission lever 42a with a pivotable about a Stichstellerwelle 42b gear strap frame 43.
  • a swing angle of the transmission frame plates 43 relative to the needle plate shaft 42b represents a measure for the feed length of the feed dog 13
  • Frame 43 is also referred to as a backdrop.
  • the pivotal position of the transmission link frame 43 is set via manual actuation of the transmission positioning frame 42.
  • the transmission control frame 42 can also be actuated driven, which in particular can be controlled by a central control device of the sewing machine 1.
  • a stitch length for a forward stitch manually, wherein the manually preselected forward stitch length is detected by the central control device and a reverse stitch then automatically with the same stitch length on the driven conversion of the gearbox setting frame 42 and corresponding to the gear lug frame 43 from the position "forward stitch length A" in the position "reverse stitch length -A" is specified.
  • a needle-bar-Transpörtwelle 46 is connected to the clamping lever 38.
  • the set via the Stichstellergetriebe 19 transport swinging motion is thus transmitted with the lever mimic 44 predetermined translation to the needle bar transport shaft 46 so that these vibrates with predetermined vibration direction and vibration amplitude about its longitudinal axis.
  • This vibration is transmitted via a further lever mimic 47 on the needle bar frame 16 to the oscillating drive of this about the pivot joint 17.
  • a transport direction and a transport length of the needle transport can also be predetermined via the stitch regulator gear 19.
  • the rotational movement of the arm shaft 5 is converted into a lifting movement of another designed as a pull rod eccentric lever 48.
  • This lifting movement is implemented via a swinging feed dog lifting shaft 49 and a further deflection lever mimic 50 in a lifting movement of the feed dog 13 perpendicular to the level of the throat plate 11.
  • the components 48 to 50 represent a feed dog lifting drive for setting a feed dog stroke of the lower feed dog 13 perpendicular to the needle plate 11.
  • Fig. 5 shows movement curves of the needle (partial), the upper transport foot and the feed dog 13 in a diagram.
  • the sewing direction 12 runs horizontally to the left in this diagram (direction y of the Cartesian xyz coordinate system of FIG Fig. 5 .)
  • the vertical axis of the diagram is perpendicular to a throat plate plane 51.
  • the needle (movement curve 52) and the lower feed dog 13 (movement curve 53) pass through the needle plate plane 51 on the one hand at a transport starting point or movement starting point 54 and on the other hand at a transport end point or movement end point 55.
  • a distance between the transport Start point 54 and the transport end point 55 along the sewing direction 12 is in the Fig. 5 denoted by T SE .
  • the distance T SE has an amount that depends on the particular application of the sewing machine 1 and can be 6 mm, 9 mm, 12 mm, 16 mm or even larger.
  • the maximum achievable transport length along the sewing direction 12 is correspondingly large.
  • the movement curve of the needle bar 9 corresponds to the needle movement curve 52.
  • the throat plate 11 thus represents a reference component for determining the distance of the feed dog 13.
  • a minimum distance of the upper transport foot to the throat plate plane 51 is in the Fig. 5 denoted by OT 0 .
  • the movement curve 53 of the lower feed dog 13 extends along the sewing direction 12 in a plateau transport path P UT , which is between the Transport starting point 54 and the transport end point 55 is located with a distance deviation from the extremal distance UT 0 of the feed dog 13 to the throat plate 11 of not more than 20% parallel to the needle plate 11. This is in the Fig. 5 represented by an even more severe deviation of only 10% of the extremal distance UT 0 . Marked in the Fig. 5 the distance 0.9 UT 0 .
  • the feed dog 13 has a distance to the throat plate plane 51 which is always at least 0.9 UT 0 .
  • the plateau transport path P UT of the feed dog 13 is approximately half as large as the distance T SE between the transport start point 54 and the transport end point 55 in the feed dog movement curve 53.
  • the feed dog 13 thus runs longitudinally between these extreme points 54, 55 a large area of the entire transport path, namely along the plateau transport path P UT , practically equidistant from the throat plate 11, so that along the plateau transport path P UT the feed dog 13 transports the material with virtually constant force relationships.
  • Comparable runs a movement curve 56 of the upper transport foot Shown in the Fig. 5 in addition to the extremal distance OT 0 , the distance 1.1 OT 0 .
  • the upper transport foot extends with a maximum deviation of 10% from the extreme distance OT 0 parallel to the throat plate 11.
  • the plateau transport path P OT is about 2/3 the distance T SE between the transport starting point 54 and the transport end point 55. Also at the upper transport foot along the plateau transport path P OT constant transport and force ratios are ensured during transport of the fabric.
  • the movement curves 52, 53 and 56 each have a proportion of movement along the sewing material transport direction 12.
  • the plateau behavior of the movement curves 53 and 56 is achieved on the one hand via the lever design of the feed dog drive 18 and on the other hand via the design of the triangular eccentric 20.
  • Fig. 6 shows a round eccentric 57, which can be used in place of the triangular cam 20.
  • the round eccentric 57 has a round eccentric inner component 58 and a round eccentric outer component 59.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP13162251.6A 2012-05-25 2013-04-04 Nähmaschine Active EP2666898B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012208907A DE102012208907A1 (de) 2012-05-25 2012-05-25 Nähmaschine

Publications (2)

Publication Number Publication Date
EP2666898A1 EP2666898A1 (de) 2013-11-27
EP2666898B1 true EP2666898B1 (de) 2015-03-11

Family

ID=48040090

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13162251.6A Active EP2666898B1 (de) 2012-05-25 2013-04-04 Nähmaschine

Country Status (6)

Country Link
EP (1) EP2666898B1 (zh)
JP (1) JP6166944B2 (zh)
KR (1) KR101978311B1 (zh)
CN (1) CN103422262B (zh)
DE (1) DE102012208907A1 (zh)
TW (1) TWI588315B (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105088547A (zh) * 2015-09-30 2015-11-25 杰克缝纫机股份有限公司 缝纫机抬牙送料机构及缝纫机
CN105113136A (zh) * 2015-09-30 2015-12-02 杰克缝纫机股份有限公司 缝纫机送料机构及缝纫机

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6361292B2 (ja) * 2014-05-30 2018-07-25 ブラザー工業株式会社 ミシン
CN105177870B (zh) * 2015-09-30 2019-01-11 杰克缝纫机股份有限公司 缝纫机抬牙机构
CN105113152B (zh) * 2015-09-30 2018-04-17 杰克缝纫机股份有限公司 缝纫机
CN112593350A (zh) * 2020-11-27 2021-04-02 常熟市虞城纺织服装科技发展有限公司 一种生产纺织服装缝制设备

Family Cites Families (17)

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US763625A (en) * 1903-05-11 1904-06-28 Ernest A Oakes Jr Feeding mechanism.
GB338032A (en) * 1929-12-16 1930-11-13 Singer Mfg Co Sewing machine
US2065885A (en) * 1933-09-14 1936-12-29 Cons Packaging Machinery Corp Sewing machine
US2442647A (en) * 1946-01-14 1948-06-01 Fischbein Dave Sewing machine
GB632238A (en) * 1947-01-15 1949-11-18 Ottomar Lord Sewing machine
US2577430A (en) * 1950-03-07 1951-12-04 Union Special Machine Co Needle feed sewing machine
GB837806A (en) * 1955-07-15 1960-06-15 Union Special Machine Co Improvements in and relating to sewing machines, especially lockstitch sewing machines
JPS5142514A (ja) * 1974-10-08 1976-04-10 Funai Electric Co Kasetsutoteepurekoodano ootoripiitokiko
JPH0728966B2 (ja) * 1986-04-10 1995-04-05 ペガサスミシン製造株式会社 シリンダ−ベツドミシンの差動送り装置
DE3724004A1 (de) * 1987-07-21 1989-02-02 Kochs Adler Ag Naehmaschine mit nadelstangen-schwingrahmen
JPH04164485A (ja) * 1990-10-30 1992-06-10 Juki Corp ミシンにおける布送り歯の軌跡調節機構
TW380178B (en) * 1997-11-03 2000-01-21 Juki Kk Cloth feeding method and apparatus for sewing machine
JP2004329394A (ja) * 2003-05-02 2004-11-25 Juki Corp ミシンの送り装置
JP2008104718A (ja) * 2006-10-26 2008-05-08 Juki Corp ミシンの送り機構
JP2010057906A (ja) * 2008-08-04 2010-03-18 Juki Corp 上下送りミシン
DE102009047534A1 (de) 2009-12-04 2011-06-09 Dürkopp Adler AG Nähmaschine
CN101805965A (zh) * 2010-04-14 2010-08-18 浙江新杰克缝纫机股份有限公司 左手式缝纫机

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105088547A (zh) * 2015-09-30 2015-11-25 杰克缝纫机股份有限公司 缝纫机抬牙送料机构及缝纫机
CN105113136A (zh) * 2015-09-30 2015-12-02 杰克缝纫机股份有限公司 缝纫机送料机构及缝纫机

Also Published As

Publication number Publication date
DE102012208907A1 (de) 2013-11-28
TW201400665A (zh) 2014-01-01
CN103422262A (zh) 2013-12-04
JP2013244402A (ja) 2013-12-09
JP6166944B2 (ja) 2017-07-19
TWI588315B (zh) 2017-06-21
KR20130132297A (ko) 2013-12-04
KR101978311B1 (ko) 2019-05-14
EP2666898A1 (de) 2013-11-27
CN103422262B (zh) 2016-12-28

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