EP0368865A1 - Obertransporteinrichtung an nähmaschinen - Google Patents

Obertransporteinrichtung an nähmaschinen

Info

Publication number
EP0368865A1
EP0368865A1 EP88904218A EP88904218A EP0368865A1 EP 0368865 A1 EP0368865 A1 EP 0368865A1 EP 88904218 A EP88904218 A EP 88904218A EP 88904218 A EP88904218 A EP 88904218A EP 0368865 A1 EP0368865 A1 EP 0368865A1
Authority
EP
European Patent Office
Prior art keywords
foot
rocker
upper transport
transport foot
support element
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.)
Withdrawn
Application number
EP88904218A
Other languages
German (de)
English (en)
French (fr)
Inventor
Kurt Klundt
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.)
Pfaff Industriemaschinen GmbH
Original Assignee
Pfaff Industriemaschinen GmbH
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 Pfaff Industriemaschinen GmbH filed Critical Pfaff Industriemaschinen GmbH
Publication of EP0368865A1 publication Critical patent/EP0368865A1/de
Withdrawn legal-status Critical Current

Links

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
    • D05B27/04—Work-feeding means with feed dogs having horizontal and vertical movements arranged above the workpieces

Definitions

  • the invention relates to an upper transport device according to the preamble of patent claim 1.
  • a transmission rocker for the lifting drive of the upper transport foot is mounted on the supporting element of the support system, so that the upper transport foot is carried upwards when the support system is raised.
  • the lifting drive has a largely sinusoidal motion course in this arrangement.
  • the upper transfer foot reaches its maximum speed when placed on the sewing material, so that vibrations can occur at high speeds of the sewing machine
  • the invention has for its object to change the sequence of movements of the upper transport foot in the generic upper transport device in such a way that the relative speed of the upper transport foot is significantly reduced in the mounting phase.
  • the vertical movement component acting on the upper transport foot in its mounting phase from the lifting drive is significantly reduced compared to the normal sinusoidal movement sequence, while the vertical one Movement component is increased outside the touchdown phase.
  • the duration of the mounting phase of the upper transport foot is increased and the forces to be absorbed by the compression springs are reduced.
  • Fig. 1 is a side view of a sewing machine with a
  • Fig. 2 is a diagrammatic representation of the
  • Fig. 3 is an enlarged view of the transmission elements for the upper feed foot, partially cut and
  • Fig. 4 is a side view of the parts shown in Fig. 3, partially in section.
  • Fig. 1 shows a side view of a sewing machine, in the housing of a presser foot (2) carrying a presser foot (1) and a needle bar (4) mounted in a needle bar carrier (3), the thread-guiding needle (5) of which is shown with a gripper (not shown) works together.
  • the sewing machine has an upper feed foot (6) which interacts with a lower fabric slide (not shown).
  • a main shaft (7) (FIG. 2) which is driven in a known manner and which drives the needle bar (4) via a crank (8) and a link (9) is also mounted in the housing of the sewing machine.
  • the handlebar (9) is mounted on a pin (10) fastened in the crank (8).
  • a handlebar (28) (Fig. 1) is pivotally mounted, the other end of which is articulated to a support (29) for the upper feed foot (6).
  • the support element (20) also carries a pin (30) on which a telescopic rod (31) is mounted, which is also connected to the carrier (29) via a joint pin (32).
  • the upper feed foot (6) is driven by a stitch actuator (40) (FIG. 2) which is connected to an eccentric (41) attached to the main shaft (7).
  • the stitch regulator (40) has an adjusting shaft (42) mounted in the housing, which is fixedly connected to a bracket (43), between the arms of which a further bracket (44) is rotatably supported by pins (45).
  • the arms of the bracket (44) are connected by a bolt (46) to which an eccentric rod (47) is articulated.
  • the eccentric (41) which is enclosed by the eccentric rod (47), gives the bolt (46) oscillating movements around the pins (45).
  • a handlebar (49) engaging on one end on the bolt (46) is articulated on the other end on a lever arm (51) which is parallel to one end of one in the housing
  • Main shaft (7) mounted oscillating shaft (52) is attached.
  • a lever arm (53) is connected to the other end of the oscillating shaft (52) and engages on an oscillating lever (55) via a link (54).
  • This is on an oscillating shaft (56) mounted in the shoulder of the housing (Fig. 1) attached, which carries a further rocker arm (57) which is connected via a link (58) to the pin (32) of the carrier (29).
  • a lever arm (60) is attached to the adjusting shaft (42) (Fig. 2) of the stitch actuator (40) and is connected via a link (61) to a crank (63) attached to an adjusting shaft (62).
  • a control crank (64) is clamped onto the control shaft (62) mounted in the housing and is connected via an intermediate member (65) and a further control crank (66) to an intermediate shaft (67) mounted in the housing.
  • a lever (68) is attached to this.
  • the lever (68) is connected via a ball pull rod (69) to one end of a rocking lever (70) which can be pivoted about an axis (71) fixed to the housing.
  • the still free end of the rocker arm (70) has a spherical projection (72) and projects into a positioning curve (73) of a lockable setting wheel
  • the positioning curve (73) in the setting wheel (74) is so spiral to its axis (75) that it allows stitch lengths of, for example, 1 to 6 mm to be set on the upper feed foot (6).
  • a spring (76) which surrounds the intermediate shaft (67) and is fastened at one end in the housing holds the shoulder (72) of the rocking lever (70) in constant contact with one of the side walls of the positioning curve (73).
  • the adjusting shaft (62) is connected in a known manner to the lower fabric slide, not shown, so that when the adjusting wheel (74) is adjusted, both the upper feed foot (6) and the lower fabric slide are adjusted synchronously with one another.
  • the telescopic rod (31) arranged between the support element (20) (FIGS. 3 and 4) and the carrier (29) for the upper transport foot (6) is divided into an upper fork (80) and a lower fork (81).
  • the lower fork (81) is connected to a bolt piece (82) and the upper fork (80) to a socket piece (83), which are pushed into each other and held together by a screw (84) screwed into the bolt piece (82).
  • a disc spring (85) is inserted between the head of the screw (84) and the upper fork (80) and a disc spring assembly (86) is inserted between the bushing piece (83) and the lower fork (81).
  • the preload of the plate spring assembly (86) can be changed by means of a nut (87) which is screwed onto the threaded bushing piece (83).
  • Upper feed foot (6) (FIGS. 1 and 2) is made by turning the setting wheel (74), whereby the positioning curve (73) rotates the intermediate shaft (67) via the rocker arm (70) accordingly.
  • the intermediate shaft (67) adjusts the adjusting shaft (62) via the intermediate member (65) and the adjusting shaft (42) via the link (61) and the lever arm (60). This arrangement ensures that when adjusting the setting wheel (74) the feed adjustment of the upper feed foot (6) is synchronized with the
  • Feed setting of the lower feed pusher is changed via the adjusting shaft (62).
  • the movement derived from the eccentric (41) is controlled via the drive connection - eccentric rod (47), bolt (46), handlebar (49), lever arm (51), rocker shaft (52), lever arm (53), handlebar (54), rocker arm ( 55 and 57), handlebar (58), pivot pin (32) and carrier (29) - transferred to the upper feed foot (6), which thereby executes a corresponding feed movement.
  • the telescopic rod (31) shortens during the work process while increasing the spring tension of the plate spring assembly (86) and returns to its original length when unloaded.
  • the plate spring assembly (86) thus takes up the remaining stroke as well as the stroke movement of the lower fabric slide above the needle plate after the upper feed foot (6) has been placed on the sewing material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP88904218A 1987-07-27 1988-05-13 Obertransporteinrichtung an nähmaschinen Withdrawn EP0368865A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3724788 1987-07-27
DE19873724788 DE3724788A1 (de) 1987-07-27 1987-07-27 Obertransporteinrichtung an naehmaschinen

Publications (1)

Publication Number Publication Date
EP0368865A1 true EP0368865A1 (de) 1990-05-23

Family

ID=6332419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88904218A Withdrawn EP0368865A1 (de) 1987-07-27 1988-05-13 Obertransporteinrichtung an nähmaschinen

Country Status (8)

Country Link
US (1) US5113773A (en(2012))
EP (1) EP0368865A1 (en(2012))
JP (1) JPH02504346A (en(2012))
KR (1) KR890701823A (en(2012))
BR (1) BR8807627A (en(2012))
DE (1) DE3724788A1 (en(2012))
ES (1) ES2008513A6 (en(2012))
WO (1) WO1989001068A1 (en(2012))

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3902445C1 (en) * 1987-07-27 1990-06-28 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern, De Sewing machine with an over-transport device
KR910700374A (ko) * 1989-01-27 1991-03-15 틸만스; 클라인 상부 이송 장치를 구비한 재봉틀
JPH04259486A (ja) * 1991-02-14 1992-09-16 Mitsubishi Electric Corp ミシンの上送り装置
US5247129A (en) * 1991-06-10 1993-09-21 Yamaha Corporation Stringless piano-touch electric sound producer for directly driving a sound board on the basis of key actions
IT226289Z2 (it) * 1992-02-28 1997-06-02 Rimoldi Srl Gruppo di trasporto superiore amovibile per macchine per cucire
JPH0574474U (ja) * 1992-03-23 1993-10-12 ヤマトミシン製造株式会社 ミシンの上送り装置
EP1681380B1 (de) * 2005-01-12 2007-09-26 BERNINA International AG Obertransportvorrichtung für Nähmaschinen
DE102005029955A1 (de) * 2005-06-28 2007-01-04 Dürkopp Adler AG Nähmaschine

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3570427A (en) * 1969-07-02 1971-03-16 Pfaff Ag G M Top feed means for sewing machines
US3570426A (en) * 1969-11-25 1971-03-16 Singer Co Top feed mechanism for sewing machines
US3935826A (en) * 1973-07-26 1976-02-03 Durkoppwerke Gmbh Method of and apparatus for feeding a workpiece along a surface of a sewing machine
DE2620209C3 (de) * 1976-05-07 1979-01-04 Duerkoppwerke Gmbh, 4800 Bielefeld Nähmaschinenobertransportvorrichtung
DE2625152C3 (de) * 1976-06-04 1978-12-07 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Nähmaschine mit Differentialtransport
EP0046814B1 (de) * 1980-08-22 1985-08-14 Pfaff Industriemaschinen GmbH Obertransporteinrichtung an einer Nähmaschine
DE3043141C2 (de) * 1980-11-15 1983-12-15 Dürkoppwerke GmbH, 4800 Bielefeld Nähmaschinen-Obertransportvorrichtung
DE3119716C1 (de) * 1981-05-18 1982-11-04 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Obertransporteinrichtung an einer Naehmaschine
DE3132044C2 (de) * 1981-08-13 1983-10-06 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Stoffdrückereinrichtung an einer Nähmaschine
DE3448022A1 (de) * 1984-06-28 1986-04-24 Kochs Adler Ag, 4800 Bielefeld Obertransportvorrichtung an einer naehmaschine
DE3435633C1 (de) * 1984-09-28 1985-06-20 Dorina Nähmaschinen GmbH, 7500 Karlsruhe Obertransporteinrichtung an Naehmaschinen
DE3528295A1 (de) * 1985-08-07 1987-02-19 Pfaff Ind Masch Naehmaschine mit einer abtastvorrichtung
JPS62189087A (ja) * 1986-02-15 1987-08-18 ブラザー工業株式会社 柄合わせ縫製を行うためのミシン
DE3632757A1 (de) * 1986-09-26 1988-04-07 Pfaff Ind Masch Naehmaschine mit einer vorschubvorrichtung
DE3724787A1 (de) * 1987-07-27 1989-02-16 Pfaff Ind Masch Naehmaschine mit einer obertransporteinrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8901068A1 *

Also Published As

Publication number Publication date
JPH02504346A (ja) 1990-12-13
US5113773A (en) 1992-05-19
DE3724788A1 (de) 1989-02-16
KR890701823A (ko) 1989-12-21
DE3724788C2 (en(2012)) 1989-06-01
ES2008513A6 (es) 1989-07-16
BR8807627A (pt) 1990-05-29
WO1989001068A1 (en) 1989-02-09

Similar Documents

Publication Publication Date Title
EP0046814B1 (de) Obertransporteinrichtung an einer Nähmaschine
DE3724787C2 (en(2012))
DE3902443A1 (de) Naehmaschine mit einer obertransporteinrichtung
EP0368865A1 (de) Obertransporteinrichtung an nähmaschinen
DE3531630C1 (de) Vorschubeinrichtung an einer Naehmaschine
CH679134A5 (en(2012))
DE3119716C1 (de) Obertransporteinrichtung an einer Naehmaschine
DE868100C (de) Antriebsvorrichtung fuer den Stoffschieber
DE2951182A1 (de) Naehmaschine
DE10233017A1 (de) Augen-Knopfloch-Nähmaschine
DE3219395C2 (en(2012))
DE2832629C2 (de) Schaftmaschine für Webmaschinen
DE3902445C1 (en) Sewing machine with an over-transport device
DE1058820B (de) Stichstelleinrichtung fuer Naehmaschinen
DE3721331A1 (de) Naehmaschine mit angetriebener stoffdrueckereinrichtung
DE869775C (de) Vorrichtung zum Fortschalten des Kettenbaumes von Webstuehlen
WO1990008849A1 (de) Nähmaschine mit einer obertransporteinrichtung
EP0102547A2 (de) Transportautomat, insbesondere zur Pressenverkettung
DE2031437C (de) Obertransporteinrichtung an Nähmaschinen
DE652333C (de) Nadelstangensteuervorrichtung fuer Zickzacknaehmaschinen
DE407217C (de) Naehmaschine mit Differential-Stoffschiebervorrichtung
DE474704C (de) Naehmaschine mit einer Haupt- und einer in dieser gelagerten und gegen sie gleitenden Hilfs-Stoffschieberstange
DE3606285C2 (en(2012))
DE3610125C1 (de) Naehmaschine mit Differential-Stoffvorschub
DE414101C (de) Schuhnaehmaschine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19890401

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19911203