EP3088592B1 - Nähmaschine - Google Patents

Nähmaschine Download PDF

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Publication number
EP3088592B1
EP3088592B1 EP16164386.1A EP16164386A EP3088592B1 EP 3088592 B1 EP3088592 B1 EP 3088592B1 EP 16164386 A EP16164386 A EP 16164386A EP 3088592 B1 EP3088592 B1 EP 3088592B1
Authority
EP
European Patent Office
Prior art keywords
sewing machine
housing
arm shaft
stitch
arm
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
EP16164386.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3088592A1 (de
Inventor
Christoph Heckner
Gerd Langreck
Jonas Exner
Florian Schulz
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 EP3088592A1 publication Critical patent/EP3088592A1/de
Application granted granted Critical
Publication of EP3088592B1 publication Critical patent/EP3088592B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D05B69/10—Electrical or electromagnetic drives
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/02—Upper casings
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/005—Doors or covers for accessing inner parts of the machine; Security devices therefor

Definitions

  • the invention relates to a sewing machine.
  • Such a sewing machine is known from the WO 01/92625 A1 , from the DE 100 13 414 C1 , from the DE 198 07 771 C1 , from the DE 94 12 091 U1 and from the CH 175 512 A ,
  • a sewing machine with a molded main body part is made of US 1,978,281 A known.
  • the GB 182,057 A discloses a sewing machine in which a motor is mounted fixed to the housing in the region of an arm housing section, wherein a drive shaft of the drive motor s extends parallel to the arm shaft
  • the embodiment of the main housing part according to the invention which is designed to be open on an operator side, ie towards the operator, makes it possible to produce the main housing part by means of core-free casting.
  • the opening of the main housing part on the operator side allows good accessibility of internal sewing machine components for the maintenance and repair of these.
  • the main body is integrally formed and includes the stator housing portion, the arm housing portion and the head housing portion.
  • a arm shaft drive is compactly housed in or on the sewing machine housing.
  • the arm shaft drive motor is mounted fixed to the housing in the region of the arm housing section, so that it is advantageously accommodated near the arm shaft, resulting in a stable drive without long transmission paths.
  • the drive shaft of the drive motor extends parallel to the arm shaft, so represents no extension of this, resulting in the possibility of a very compact sewing machine model with short arm shaft due to the additional arrangement of the drive means on the opposite side of the head housing portion of the drive motor.
  • a housing cover according to claim 2 makes it possible to close the operator-side opening of the main housing part depending on the current requirements of a sewing machine variant.
  • Housing covers with different constructions and also with different designs can be used.
  • the housing cover can be made in one or more parts.
  • a housing cover made of plastic is inexpensive.
  • a toothed belt as a drive means is low-wear and durable.
  • a single toothed belt as a drive means can drive in particular the Enough stitching tools on the sewing machine.
  • By means of a corresponding design of gears with which the toothed belt meshes it is possible to achieve a desired over or under reduction of a speed of the arm shaft in relation to the speed of a drive shaft of the drive motor.
  • An arrangement of the drive motor according to claim 7 is on the one hand compact and on the other hand makes it possible to cool the drive motor from the outside.
  • the drive motor is not arranged in the sewing machine housing.
  • An axial extension of the drive motor according to claim 8 makes it possible to accommodate the drive motor over the stator of the sewing machine housing so that it does not or only slightly protrudes on both sides of the stand. This improves stability of the sewing machine.
  • Sewing machine 1 illustrated with partial omission of internal and external components has a base plate 2, a stand 3 upstanding therefrom and an upper arm 4.
  • the base plate 2, stand 3 and arm 4 are parts of a sewing machine housing 5 having a base plate housing section 2a. a stator housing section 3a and an arm housing section 4a.
  • the arm 4 terminates in a head 6 with a head housing portion 6a.
  • the sewing machine 1 has stitch forming tools, namely a needle bar 7 with a sewing needle (not shown) attached thereto and one in the Fig. 1
  • the gripper 8 is arranged below a support plane 9, which is defined by a support plate 10.
  • Part of the support plate 10 is a throat plate 11 (see. Fig. 4 ).
  • the needle plate 11 has a central passage opening for a lower material feed conveyor 12. This in turn has a tap hole for the passage of the sewing needle.
  • the sewing machine housing 5 has a cast main body portion 13, which is made open on an operator side, as the views of the Fig. 2 and 3 can be seen.
  • the main housing part 13 is made in one piece and includes the stator housing portion 3a, the arm housing portion 4a and the head housing portion 6a.
  • the main housing part 13 is designed so that it can be cast without undercut in a core-free form.
  • a housing cover 14 which in the Fig. 6 broken in section is shown.
  • the housing cover 14 may be made in one piece or alternatively also in several parts.
  • the housing cover 14 is made of plastic.
  • the stitch forming tools ie the needle bar 7 and the gripper 8 are driven by an arm shaft 15.
  • the arm shaft 15 is a arm shaft drive motor 16 (see. Fig. 3 and 4 ) via a toothed belt 17 in operative connection.
  • the arm shaft drive motor 16 is mounted on the arm housing portion 4a on a side remote from the operator side of the housing.
  • the arm shaft drive motor 16 is received in a recess of the sewing machine housing 5.
  • An axial extent of the arm shaft drive motor 16 corresponds to a width of the stator housing section 3a.
  • a drive gear 18 (see. Fig. 9 ), which is non-rotatably connected to a drive shaft 19 of the arm shaft drive motor 16.
  • the arm shaft drive motor 16 is mounted fixed to the housing in the region of the arm housing section 4a.
  • the drive shaft 19 of the arm shaft drive motor 16 extends parallel to the arm shaft 15.
  • the drive shaft 19 has the support plane 9 a greater distance than the arm shaft 15th
  • the drive means that is the toothed belt 17, is arranged on a side of the arm shaft drive motor 16 opposite the head housing section 6a.
  • the drive motor 16 is not an extension of the arm shaft 15.
  • the drive shaft 19 is not aligned with the arm shaft 15th
  • the toothed belt 17 passes through a tension pulley 22.
  • the arm shaft gear 20 is interposed between the arm housing portion 4a and a handwheel rotatably connected to the arm shaft 15 23 of the sewing machine 1 is arranged.
  • the lower shaft gear 21 is rotatable with a lower shaft 24, via which, inter alia, the gripper 8 is driven.
  • a needle transport shaft 24a Parallel to the arm shaft 15 extends a needle transport shaft 24a over which, derived from the Armwellenburnung, a swinging movement of a Nadelstangenkulisse 24b takes place.
  • a needle transport as a material feed is provided by the sewing machine 1.
  • the sewing machine 1 allows both upper and lower feed for the sewing material via the needle bar link 24b on the one hand and via the lower feed dog 12 on the other hand.
  • the sewing machine 1 has a stitch length adjusting device 25, of the components in particular in the Fig. 4 to 10 are shown.
  • a large stitch length during the forward transport of sewing material in a workpiece conveying direction x (see FIG. Fig. 3 )
  • a backward stitch length during the fabric transport (-x) against the fabric transport direction x and a short stitch stitch length in the fabric transport direction x, in particular for a thread section, are specified.
  • an aspect ratio between the forward stitch length and the backward stitch length can be calibrated.
  • the stitch length adjusting device 25 has a stop unit 26 for specifying stops for a lever body 27, which can be switched around an adjusting axis 28.
  • the stop unit 26 is formed as Einstellkulisse for a bolt 29 of the lever body 27 and is also referred to as throat.
  • the lever body 27 is changeable between a in the Fig. 5 shown forward stitch stop position for specifying a transport movement of the material to be transported 12 in the fabric transport direction x and one in the Fig. 6 shown reverse stitch stop position for specifying a transport movement of the material to be transported 12 opposite (-x) the fabric transport direction x.
  • the forward stitch stop position is a forward stitched gate position wherein the pin 29 abuts a forward stitch curve portion 30 of the adjustment gate 26.
  • the reverse stitch stop position is formed as a reverse stitched gate position in which the pin 29 abuts against a reverse stitch curve portion 31 of the adjustment gate 26.
  • a Umstellantrieb 32 For switching the lever body 27 between the forward stitch stop position and the reverse stitch stop position is a Umstellantrieb 32, which is designed as a pneumatic cylinder with a piston 33.
  • the piston 33 is in the forward stitch stop position after Fig. 5 fully retracted and behind in the reverse stitch stop position Fig. 6 extended so far until the lever body 27 in the Fig. 5 and 6 counterclockwise about the adjusting axis 28 is pivoted in the reverse stitch stop position.
  • the piston 33 rests against an arcuate surface 34 of the lever body 27.
  • the Fig. 5 and 6 show the stopper unit 26, so the Einstellkulisse, in the position "large stitch length".
  • a first forward adjustment 35 is formed by a dial, which cooperates with an axially displaceable threaded spindle.
  • a crowned running, free end 36 of the threaded spindle is located on a lever surface 37 of the stopper unit 26 to specify their position "large stitch length".
  • the stop unit 26 is biased by means of a biasing spring.
  • this position can be fine-adjust and thus specify the large stitch length.
  • the stopper unit 26 can be switched between in the Fig. 5 and 6 shown position "large stitch length” and a position "small stitch length", which is not shown in the drawing.
  • the second forward adjustment device 43 like the first forward adjustment device 35, is also designed as a dial.
  • the stop unit 26 When switching between the positions "large stitch length” and “small stitch length", the stop unit 26 is pivoted about an eccentrically mounted calibration shaft 44.
  • the calibration shaft 44 is part of a calibration device 45 for setting a length ratio between a forward stitch length and a backward stitch length.
  • An eccentric 46 is mounted on the calibration shaft 44 and a calibration adjustment screw 47 (see. Fig. 8 ) fixed. By loosening the calibration adjustment screw 47, the eccentric 46 can be rotated about the calibration shaft 44.
  • the calibration adjustment screw 47 is via a slot 48 accessible from the outside by the operator. A z-extension of the slot 48 limits a calibration adjustment range of the eccentric 46.
  • the calibration device 45 of the eccentric 46 is releasably connected by means of a calibration adjustment with the stop unit or the Einstellkulisse 26.
  • an adjustment of the stitch length results from the common rotation of the Einstellkulisse 26 and the eccentric 46 to the Kalibrierwelle 44.
  • the calibration adjustment in this variant is accessible from the outside via a curved slot, which specifies a permissible calibration adjustment of the eccentric 46 ,
  • Stichstellergetriebe 49 Part of the stitch length adjusting device 25 is a Stichstellergetriebe 49, which is designed in a conventional manner as a lashing gear.
  • the Stichstellergetriebe 49 is connected on the one hand to the lever body 27 and the other via a transmission lever 50 and a lever deflection with a feed dog drive shaft 51, which is also referred to as Stichstellerwelle.
  • the Stichstellerwelle 51 is designed as a rocking shaft.
  • An oscillation angle of the stitcher shaft 51 about its longitudinal axis is a measure of the transport movement of the lower material conveyor 12 in or against the material to be conveyed. Via a further deflection, the stitcher shaft 51 is connected to the lower material feed conveyor 12.
  • An adjusting frame 52 of the Stichstellergetriebes 49 is rotatably connected to the lever body 27, which cooperates with the Einstellkulisse 26 connected. This rotationally fixed connection via an actuating shaft 53, which extends along the control axis 28.
  • the lever body 27 and the adjusting frame 52 can also without solving a fixation a degree of freedom of displacement about an adjusting axis is present, in a position which is precisely fixed relative to one another, for example via a pin connection or a screw connection.
  • the Stichstellergetriebe 49 transmits one of the arm shaft 15 via an eccentric lever 53 a transmitted drive movement to a drive movement of the transmission lever 50th
  • a short stitch setting device 54 for specifying a short stitch stitch length in the sewing material transporting direction x will be described.
  • the short stitch length is used in particular for the thread section at the end of a seam.
  • the short stitch length is smaller than the small forward stitch length explained above.
  • Fig. 9 shows the short stitch adjuster 54 in a neutral position.
  • a piston 55 of a turn designed as a pneumatic cylinder short stitch Umstellantriebs 56 is retracted.
  • the piston 55 constitutes a drive body of the short stitch reversing drive. Biased by a biasing spring, an arcuate surface 57 of a short stitch lever body 58 bears against the free end of the piston 55.
  • the short stitch lever body 58 is rotatably connected to the actuating shaft 53, with which also the lever body 27, which cooperates via the pin 29 with the Einstellkulisse 26, is rotatably connected.
  • Fig. 10 shows the short stitch adjustment 54 in the position "short stitch for the thread section".
  • the piston 55 of the short stitch Umstellantriebs 56 is extended and accordingly the short stitch lever body 58 in the Fig. 9 and 10 pivoted counterclockwise about the control shaft 53.
  • a specification of the short stitch stitch length via a short stitch stop body 59 In the position "short stitch for the thread section" after the 10 and 11 a circumferential collar 60 of the piston 55 of the short stitch reversing drive 56 strikes an arcuate counter surface 61 of the short stitch stop body 59, whereby the piston stroke and thus the position of the short stitch lever body 58 is limited and defined.
  • the short stitch stop body 59 is pivotable about a pivot axis 62, which is predetermined by a mounting screw 63 for the short stitch stop body 59.
  • the mounting screw 63 thus represents a stopper body shaft.
  • a specification of the stop position is carried out by a corresponding pivoting of the short stitch stop body 59 to the stop body shaft 63. This pivoting is done by turning a threaded pin 64 which is screwed into the short stitch stop body 59 and machine side against a housing-fixed wall 65 is supported. From the outside, an adjusting head 66 of the threaded pin 64 is freely accessible.
  • the drives 16, 32, 38 and 56 are controlled via a central control device 67, which in the Fig. 1 indicated by dashed lines.
  • the sewing machine 1 allows a stitch count of more than 2,000 stitches per minute and typically 3,000 stitches per minute.
  • sewing material can be sewn with a material thickness of more than 4 mm.
  • a needle thickness of the sewing machine 1 may be greater than 1.1 mm in diameter (nominal needle size 110).
  • the needle thickness may be greater than 1.25 mm, may be greater than 1.5 mm, may be greater than 1.75 mm and may be greater than 2 mm.
  • a thread thickness can be thicker than 0.3 mm in diameter.
  • the thread thickness may be thicker than nominal 60 (60 m thread weigh 1 g).
  • the thread thickness can be thicker than 0.5 mm, as 0.7 mm, as 0.9 mm or as 1 mm in diameter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP16164386.1A 2015-04-30 2016-04-08 Nähmaschine Active EP3088592B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202015102172.0U DE202015102172U1 (de) 2015-04-30 2015-04-30 Nähmaschine

Publications (2)

Publication Number Publication Date
EP3088592A1 EP3088592A1 (de) 2016-11-02
EP3088592B1 true EP3088592B1 (de) 2019-09-04

Family

ID=55701829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16164386.1A Active EP3088592B1 (de) 2015-04-30 2016-04-08 Nähmaschine

Country Status (6)

Country Link
EP (1) EP3088592B1 (zh)
JP (1) JP3205173U (zh)
KR (1) KR20160003880U (zh)
CN (1) CN206143450U (zh)
DE (1) DE202015102172U1 (zh)
TW (1) TWM541478U (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202015102172U1 (de) * 2015-04-30 2016-08-04 Dürkopp Adler AG Nähmaschine
DE102017207626A1 (de) * 2017-05-05 2018-11-08 Dürkopp Adler AG Verfahren zum Erzeugen eines Naht-Endunterfadens mit vorgegebenem Soll-Nahtüberstand
CN109537193B (zh) * 2019-01-11 2022-05-10 广东金悦来自动化设备有限公司 小直径圆筒缝纫机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB182057A (en) * 1921-08-31 1922-06-29 Diehl Mfg Co Motor driven sewing machine
US1978281A (en) * 1928-10-29 1934-10-23 Pfaff Karl Sewing machine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH175512A (de) * 1933-03-31 1935-02-28 Pfaff Ag G M Nähmaschinenoberteil.
JPH0737070U (ja) * 1993-12-20 1995-07-11 ジューキ株式会社 ミシンの駆動装置
DE19807771C1 (de) * 1998-02-24 1999-04-15 Duerkopp Adler Ag Augenknopfloch-Nähmaschine
DE10013414C1 (de) 2000-03-17 2001-05-10 Duerkopp Adler Ag Stelleinrichtung, insbesondere Stichlängen-Stelleinrichtung für eine Nähmaschine
DE10028274C1 (de) * 2000-05-26 2002-04-18 G M Pfaff Ag I I Gehäuse für Stichgruppennähmaschinen
JP2002360963A (ja) * 2001-06-07 2002-12-17 Brother Ind Ltd ミシン
JP5957227B2 (ja) * 2012-01-10 2016-07-27 Juki株式会社 ボタン穴かがりミシン
DE202012011059U1 (de) * 2012-11-19 2014-02-20 Dürkopp Adler AG Nähmaschine
DE202015102172U1 (de) * 2015-04-30 2016-08-04 Dürkopp Adler AG Nähmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB182057A (en) * 1921-08-31 1922-06-29 Diehl Mfg Co Motor driven sewing machine
US1978281A (en) * 1928-10-29 1934-10-23 Pfaff Karl Sewing machine

Also Published As

Publication number Publication date
EP3088592A1 (de) 2016-11-02
JP3205173U (ja) 2016-07-07
TWM541478U (zh) 2017-05-11
CN206143450U (zh) 2017-05-03
KR20160003880U (ko) 2016-11-09
DE202015102172U1 (de) 2016-08-04

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