EP2733245B1 - Nähmaschine - Google Patents

Nähmaschine Download PDF

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Publication number
EP2733245B1
EP2733245B1 EP13189615.1A EP13189615A EP2733245B1 EP 2733245 B1 EP2733245 B1 EP 2733245B1 EP 13189615 A EP13189615 A EP 13189615A EP 2733245 B1 EP2733245 B1 EP 2733245B1
Authority
EP
European Patent Office
Prior art keywords
upper thread
thread
sewing machine
bracket
lever
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
EP13189615.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2733245A1 (de
Inventor
Milan Mazourek
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 EP2733245A1 publication Critical patent/EP2733245A1/de
Application granted granted Critical
Publication of EP2733245B1 publication Critical patent/EP2733245B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B9/00Hem-stitch sewing machines
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B47/00Needle-thread tensioning devices; Applications of tensometers

Definitions

  • the invention relates to a sewing machine according to the preamble of claim 1.
  • the DE 10 2007 039 596 A1 describes such a sewing machine.
  • Other sewing machines are known from the DE 10 2010 043 906 A1 , of the DE 10 2011 005 198 A1 and the US 2,184,929 , Such a sewing machine is also known by public prior use.
  • a thread path presetting device is formed by a thread eye that can be adjusted in a main upper thread guide plane. When sewing, in particular with thick or flat upper threads or upper threads with a twist tendency, the known thread path presetting device has room for improvement.
  • the US 4,690,083 describes a sewing machine in which an upper thread over a biasing device 14, via a first thread clamp 12, a Fadenanzugsfeder 1, another thread clamp 13, a thread lever 9 and a downstream upper thread guide component runs.
  • the upper thread path can be influenced in its length not only in the main upper thread guide plane, but also perpendicular thereto. Such an influence provides the supernatant element of the thread path presetting device.
  • the upper thread can then be performed in a controlled manner on a path that is performed even with difficult to be stitched upper threads with sufficient distance to other sewing machine components. An undesirable loops, which can lead to a disturbance of the threadline, is effectively avoided.
  • the thread path presetting device may be arranged adjacent to a movement path of the thread lever. This can increase the effectiveness of the thread path presetting device. It is also possible to arrange a plurality of projection elements at different positions of the upper thread path. At least one further projection element can then be arranged in the upper thread path after the thread lever, in particular adjacent thereto.
  • a displaceable projection element according to claim 2 can be adapted to a default value for a threadless of the upper thread.
  • a design of the supernatant element as a bracket according to claim 3 has been found to be particularly suitable.
  • the supernatant element can be manufactured inexpensively.
  • the at least one projection element is molded onto the housing solid or hollow body, in particular as a web body.
  • a convex bracket portion according to claim 4 leads to a controlled projection.
  • the convex bracket portion can be particularly easily performed as a rounded kink.
  • a design according to claim 5 is safe.
  • Resting marks according to claim 7 have been found to be safe for setting various overhang values particularly suitable. There may be three or more locking marks depending on the design of the bracket.
  • An arrangement according to claim 9 leads to an advantageous integration of various functional components on a common carrier, which simplifies manufacture and / or assembly of the sewing machine.
  • 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 sewing machine 1 is designed for sewing heavy or durable material, eg. As leather or plastic plates.
  • the components 2 to 4, which form a housing of the sewing machine, are in the Fig. 1 only as far as their contours are concerned.
  • an arm shaft 5 is rotatable on a schematically in the Fig. 1 indicated frame 5a stored.
  • One of these arm shaft bearings is arranged in the region of a stator-side arm shaft end and another of the arm shaft bearings in the region of an opposite arm shaft end in a head 6 of the sewing machine 1.
  • About the arm shaft 5 and a crank mechanism 8 is a vertically mounted in the head 6 needle bar 9 vertically up and down driven, which carries a needle 10 at its lower end.
  • a barell gripper 11 is reciprocated in the base plate 4 about a gripper pivot axis 12 of a gripper rocker shaft 13 to and fro.
  • the Barell gripper 11 is also referred to as a Barell shuttle.
  • the gripper pivot axis 12 extends horizontally and parallel to the arm shaft 5.
  • the barell gripper 11 cooperates with the sewing needle 10 for stitch and seam formation in the fabric.
  • the barell gripper 11 and the sewing needle 10 represent stitching tools of the sewing machine 1. Instead of a barell gripper, another type of gripper can also be used.
  • the oscillating drive of the barell gripper 11 takes place via a gripper drive 14.
  • the gripper drive 14 has a drive unit 15 for generating a transmission oscillation movement about a transmission oscillation axis 17.
  • the transmission oscillating axis 17 runs parallel to the shafts 5 and 13.
  • the drive unit 15 has a connecting rod 18.
  • a rod end of the connecting rod 18 is designed as a rod eye 19, which is in driving connection with the drive shaft 5 via an eccentric unit.
  • the other rod end of the connecting rod 18 is also formed as a rod eye and communicates with a transmission wheel 22 via an axial / radial bearing 23 in transmission connection.
  • the transmission wheel 22 is pivotally mounted about the transmission oscillating axis 17 on a bearing bush 23a.
  • crank rod 18 is in transmission communication with the transmission wheel 22 for swinging it back and forth about the transmission vibration axis 17.
  • a traction means 25 of a traction mechanism 26 of the gripper drive 14 is guided.
  • the traction means 25 is designed as a toothed belt. This meshes with an outer toothing on the outer circumference of the Transmissionsrades 22nd
  • the traction mechanism 26 is used to transmit the transmission oscillatory movement of the transmission wheel 22 about the transmission oscillation axis 17 in a drive-oscillating movement of the gripper rocker shaft thirteenth
  • the gripper body of the barell gripper 11 moves synchronously with the needle 10 and takes a needle thread loop which is passed through the fabric with the needle 10 and knots this by the upper thread during the movement of the gripper body to a Gripper housing is guided around and knotted.
  • the support plate 27 For supporting components of the sewing machine 1 is a fixed in the region of the head 6 on the housing, one-piece support plate 27.
  • the support plate 27 carries, inter alia, components for guiding an upper thread 28 (see Fig. 5 ).
  • these are an upper thread guiding eye 29, two upper thread tensioning devices 30, 31, a Fadenanzugsfeder 32, another upper thread guide eye 33 in the upper thread path in front of a thread lever 34, another upper thread guide eye 35 in the upper thread path after the thread lever 34th , an upper thread clamp 36 and two more upper thread guide eyelets 37, 38 in the upper thread path after the upper thread clamp 36th
  • the support plate 27 carries components of the upper thread tensioning devices 30, 31, namely actuators for opening and closing of clamping components of the clamping devices 30, 31, said actuators may be designed as a pneumatic cylinder.
  • the voltage components can be tension discs.
  • the tension discs are in the Fig. 3 shown at 38a.
  • the support plate 27 further contributes to the mechanical release of the clamping devices 30, 31 a pivoting plate which can be pivoted between the tension discs 38 a.
  • the Fig. 2 facing away from the support plate 27 has cable guides that can be designed as cable ducts in which both cable and pneumatic lines of the sewing machine 1 can be mounted.
  • the support plate 27 may be connected via a plug connection with a corresponding counter-body on the housing of the sewing machine 1. Towards the plug connection of the support plate 27, all the supply lines required for the operation of the components carried by the support plate 27 can then be guided. A counter-plug connection on the housing then ensures the connection of the components carried by the support plate 27 via the supply line connections connected thereto.
  • the thread lever 34 guides the upper thread 28.
  • the thread lever 34 is synchronized with the stitch forming tools 10, 11 displaceable between a top dead center and a bottom dead center displaced.
  • the position "thread lever top dead center” is in the Fig. 6 shown.
  • the support plate 27 carries a thread lever protection body 39, which is an integral part of the support plate 27.
  • the Fig. 2 and 5 show two versions of the thread lever protection body 39.
  • the thread lever protective body 39 is designed exclusively as a projection plate extending perpendicularly to the housing jacket, the outer contour of which is adapted to a movement path of the thread lever 34.
  • the thread lever protection body 39 additionally has a front cover 40 which covers the path of movement of the thread lever 34 on the front side, ie towards the operator.
  • the thread lever protection body 39 may have a threading groove for facilitating threading of the upper thread 28 in the region of the thread lever 34.
  • the support plate 27 carries sewing machine controls on the one hand in the form of a multi-button control panel 41 with a total of six control buttons 42 and on the other hand in the form of a control button 43, the function can be pre-assigned.
  • the support plate 27 carries a winding device 44 for winding a yarn package.
  • the support plate 27 carries a position setting device 45 in the form of a setting wheel for setting the position of a relative position of the stitch forming tools 10, 11, that is, for preselecting a rotational position of the arm shaft fifth
  • the support plate 27 carries a lighting device 46, which in the Fig. 2 is shown schematically.
  • the illumination device 46 serves to illuminate a section of a sewing field. This may be a sewing apron which represents a sewing field area in front of a puncture area of the needle 10 into a sewing material.
  • the support plate 27 carries a thread path presetting device 47 for influencing a length of upper thread path between the upper thread guide eye 33 as upstream in the upper thread path upstream of the thread lever 34 upper thread guide component and the thread lever 34 itself.
  • the thread path preselection device 47 will be described in more detail below.
  • the thread path presetting device 47 ensures that, for a given material thickness of the sewing material in the loop formation, the upper thread 28 runs with the correct tension over the gripper.
  • the support plate 27 carries all the yarn guide components of the sewing machine 1 from the upstream in the upper thread path abtrag researchen upper thread tensioning device 30, 31 to the thread lever 34. Furthermore, the support plate 27 carries all yarn guide components of the sewing machine 1 in the upper thread path from the thread lever 34 to the sewing needle 10th
  • the upper thread path of the upper thread 28 between the upper thread guiding eye 29 and the upper thread guiding eye 38 is indicated by way marks 47a on the support plate 27. These way marks 47a are designed by raised or recessed executed in the support plate 27 markings. The way marks 47a facilitate threading of the upper thread 28 along the upper thread path.
  • the thread path presetting device 47 has a protrusion member arranged such that the upper thread 28 is formed between the upper thread guide eye 33, which is an upstream upper thread guide component in the upper thread path in front of the thread lever 34, and the thread lever 34 is made of a main upper thread guide plane runs out.
  • This main upper thread guide plane is defined by the upper thread guide eye 33, by the thread lever 34 and by the upper thread guide eye 35 as a downstream upper thread guide component in the upper thread path after the thread lever 34.
  • the main upper thread guide plane is approximately parallel to the plane of the Fig. 2 ,
  • the projection element of the thread path presetting device 47 is designed as a bracket 48.
  • This bracket extends transversely to the upper thread run between the upper thread guide eye 33 and the thread lever 34.
  • the supernatant member 48 also, comparable to the thread lever protection body 39 in the embodiment according to Fig. 5 , be formed as a bridge body.
  • the bracket 48 has a convex strap portion 49 that defines a region of large overhang of the protrusion member 48 over the main needle thread guide plane.
  • the convex bracket portion 49 is executed in the illustrated embodiment as a rounded kink portion of the bracket 48.
  • Both ends 50, 51 of the bracket 48 are fixed to the housing of the sewing machine, namely on the support plate 27.
  • a mounted in the upper position 50 of the bracket 48 is about a pivot axis 52 (see Fig. 2 ), which extends parallel to the arm 2, mounted in a pivot-fixing bearing 53 of the support plate 27.
  • In the area of this end 50 of the bracket 48 is 90 ° compared to its other main extension parallel to a face plate portion 54 of the head 6 kinked.
  • the bracket 48 is adjustably mounted on the housing of the sewing machine, namely on the support plate 27.
  • the strap end 51 of the bracket 48 is in turn bent by 90 °, with an end-side strap portion to the strap end 51 out perpendicular to the plane of the Fig. 2 extends.
  • the adjustability is vivid in the Fig. 3 and 4 shown in two different relative positions of the end 51 of the bracket 48.
  • the bracket 48 has at the adjustable end 51 in the illustrated embodiment a total of four locking marks, which are designed as mounted in the adjustable strap end 51 locking grooves 55, 56, 57 and 58.
  • the locking grooves 55 to 58 cooperate with a counter body in the form of a spring 59 of the support plate 27 for specifying the respective relative position of the adjustable strap end 51 to the housing.
  • Fig. 3 shows the position in which the counter body 59 cooperates with the farthest from the adjustable strap end 51 arranged locking groove 58.
  • Fig. 4 shows the relative position of the adjustable strap end 51 to the support plate 27, in which the counter body 59 with the bracket end 51 next adjacent locking groove 55 cooperates.
  • the bracket 48 and in particular the convex bracket portion 49 has the largest Projection to the support plate 27 and thus also to the main upper thread management level.
  • the counter body 59 with the intermediate locking grooves 56 or 57 can be correspondingly projections of the convex ironing section 49 on the main upper thread guide plane produce, between the maximum supernatant to Fig. 4 and the minimum supernatant Fig. 3 lie.
  • the supernatant position of the bracket 48 is set on the adjustable strap end 51.
  • a large threadless plays a role especially in thick sewing material to be sewn.
  • the Fig. 5 to 9 illustrate the function of the thread path presetting device 47.
  • Fig. 5 shows an arm shaft position "0 °" at which the needle 10 is at top dead center of its travel.
  • the thread lever 34 is in the Armwellenposition after Fig. 5 On the way up.
  • Fig. 6 shows the Armwellenposition "60 °" with the thread lever 34 at top dead center.
  • the upper thread 28 is stretched between the Fadenanzugsfeder 32 and the thread lever 34, in particular between the upper thread guide eye 33 and the thread lever 34, and is located on the bracket 48 in a region between the convex bracket portion 49 and the pivotable end 50 at.
  • Fig. 7 shows the Armwellenposition "160 °", in which the thread lever 34 is from top dead center on the way down. Accordingly, the upper thread 28 in the thread path between the upper thread guide eye 33 and the thread lever 34 is no longer tensioned, but loose. This is also called “threadless”.
  • the thread path presetting device 47 ensures that the loose upper thread 28 between the upper thread guide eye 33 and the thread lever 34 has a defined course. The upper thread 28 rests against the bracket 48 again between the convex bracket portion 49 and the pivotable end 50.
  • Fig. 8 shows the Armwellenposition "220 °", in which the thread lever 34 is on its further way down and is approximately at the level of the convex ironing portion 49.
  • the upper thread 28, which is now even more loose than the Armwellenposition after Fig. 7 abuts on the bracket 48 in the region of the convex bracket portion 49.
  • the shape of the bracket 48 forces here a defined course of the upper thread 28 between the upper thread guide eye 33 and the thread lever 34. It is in the arm shaft positions between the positions of the Fig. 7 and 8th in particular prevents an uncontrollably large upper thread loop forms.
  • Fig. 9 shows the Armwellenposition "270 °", in which the thread lever 34 is in the region of its bottom dead center.
  • the upper thread 28 is now on the bracket 48 in the area between the convex bracket portion 49 and the adjustable strap end 51 at.
  • Another supernatant element on the type of supernatant element, which has been described above in connection with the thread path presetting device 47, can be arranged in the upper thread path after the thread lever 34 be.
  • the two supernatant elements so for example, the bracket 48 and another supernatant element, which may also be designed in the form of a bracket or a solid or hollow body, be disposed on both sides of the thread lever 34 and adjacent thereto.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP13189615.1A 2012-11-19 2013-10-22 Nähmaschine Active EP2733245B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012221060.1A DE102012221060B3 (de) 2012-11-19 2012-11-19 Nähmaschine

Publications (2)

Publication Number Publication Date
EP2733245A1 EP2733245A1 (de) 2014-05-21
EP2733245B1 true EP2733245B1 (de) 2016-06-22

Family

ID=49448008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13189615.1A Active EP2733245B1 (de) 2012-11-19 2013-10-22 Nähmaschine

Country Status (6)

Country Link
EP (1) EP2733245B1 (ja)
JP (1) JP6247883B2 (ja)
KR (1) KR102024106B1 (ja)
CN (1) CN103820949B (ja)
DE (1) DE102012221060B3 (ja)
TW (1) TWI628330B (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018207426A1 (de) * 2018-05-14 2019-11-14 Dürkopp Adler AG Fadenspanneinrichtung für eine Maschine
CN113774568A (zh) * 2021-09-28 2021-12-10 广东佛罗米服饰集团有限公司 一种新型服装设计裁缝装置

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB359769A (en) * 1930-11-28 1931-10-29 Int Button Hole Sewing Machine Improvements in and relating to sewing machines
US2184929A (en) * 1938-09-20 1939-12-26 Singer Mfg Co Thread controlling device for sewing machines
US2701694A (en) * 1952-03-20 1955-02-08 White Sewing Machine Corp Thread tension device for sewing machines
US4690083A (en) * 1984-11-09 1987-09-01 Janome Sewing Machine Co. Ltd. Automatic upper thread tension control for a sewing machine
JPS61265184A (ja) * 1985-05-20 1986-11-22 ブラザー工業株式会社 ミシンの自動糸掛け装置
DE3816473C2 (de) * 1987-05-15 1996-04-25 Brother Ind Ltd Fadenaufnahmehilfsvorrichtung
JP2974557B2 (ja) * 1993-09-30 1999-11-10 ジューキ株式会社 二重環縫いミシンの縫い目形成方法および装置
JPH09192370A (ja) * 1996-01-17 1997-07-29 Juki Corp ミシンの上糸張力調節装置
JP2001129281A (ja) * 1999-11-09 2001-05-15 Juki Corp 飾り縫いミシン
JP2002018171A (ja) * 2000-07-11 2002-01-22 Dainippon Printing Co Ltd 縫い始めの糸抜け防止方法及び装置
JP3729717B2 (ja) * 2000-08-28 2005-12-21 ペガサスミシン製造株式会社 二重環縫いミシン
JP3766297B2 (ja) * 2001-08-02 2006-04-12 ペガサスミシン製造株式会社 多本針二重環縫いミシンの針糸制御装置
DE102007039596A1 (de) * 2007-08-22 2009-02-26 Dürkopp Adler AG Nähmaschine sowie Verfahren zum Nähen eines Nahtanfangs mit einer derartigen Nähmaschine
JP2009050638A (ja) * 2007-08-29 2009-03-12 Juki Corp ミシン
JP2010088713A (ja) * 2008-10-09 2010-04-22 Juki Corp ミシンの糸調子装置
JP2010233904A (ja) * 2009-03-31 2010-10-21 Pegasus Sewing Mach Mfg Co Ltd 多本針二重環縫いミシンの針糸制御装置
EP2599910B1 (en) * 2010-07-28 2016-11-30 NSD Corporation Sewing machine
CN102454058A (zh) * 2010-10-29 2012-05-16 吴江市德胜服饰有限公司 自动切孔装置
DE102010043906A1 (de) * 2010-11-15 2012-05-16 Dürkopp Adler AG Nähmaschine sowie Verfahren zum Nähen eines Nahtanfangs mit einer derartigen Nähmaschine
DE102011005198A1 (de) * 2011-03-07 2012-09-13 Dürkopp Adler AG Nähmaschine sowie Verfahren zum Nähen eines Nahtanfangs mit einer derartigen Nähmaschine

Also Published As

Publication number Publication date
JP2014100474A (ja) 2014-06-05
TW201420832A (zh) 2014-06-01
KR20140064626A (ko) 2014-05-28
EP2733245A1 (de) 2014-05-21
CN103820949B (zh) 2017-06-30
DE102012221060B3 (de) 2014-02-06
CN103820949A (zh) 2014-05-28
KR102024106B1 (ko) 2019-09-23
TWI628330B (zh) 2018-07-01
JP6247883B2 (ja) 2017-12-13

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