EP0046814B1 - Pied transporteur sur machine à coudre - Google Patents

Pied transporteur sur machine à coudre Download PDF

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Publication number
EP0046814B1
EP0046814B1 EP80105004A EP80105004A EP0046814B1 EP 0046814 B1 EP0046814 B1 EP 0046814B1 EP 80105004 A EP80105004 A EP 80105004A EP 80105004 A EP80105004 A EP 80105004A EP 0046814 B1 EP0046814 B1 EP 0046814B1
Authority
EP
European Patent Office
Prior art keywords
sewing machine
power input
foot
eccentric
bolt
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.)
Expired
Application number
EP80105004A
Other languages
German (de)
English (en)
Other versions
EP0046814A1 (fr
Inventor
Albert Dusch
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
Priority to EP80105004A priority Critical patent/EP0046814B1/fr
Priority to DE8080105004T priority patent/DE3070979D1/de
Priority to JP56063539A priority patent/JPS5745892A/ja
Priority to ES502087A priority patent/ES8302138A1/es
Priority to US06/268,154 priority patent/US4422398A/en
Priority to BR8104186A priority patent/BR8104186A/pt
Publication of EP0046814A1 publication Critical patent/EP0046814A1/fr
Application granted granted Critical
Publication of EP0046814B1 publication Critical patent/EP0046814B1/fr
Expired legal-status Critical Current

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Classifications

    • 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 a top feed sewing machine according to the preamble of patent claim 1.
  • a known top transport device of this type (DE-PS 2 620 209) has the disadvantage that the generation of the non-uniform lifting movement takes place by the arrangement of a sliding thrust guide.
  • This sliding thrust guide is not only difficult to manufacture, but also has unfavorable operating properties and is subject to great wear, which can only be reduced by a high amount of lubrication.
  • the top feed device and its drive are accommodated in the head of the machine, in which full lubrication cannot be carried out for known reasons, the use of a sliding thrust guide within this drive is problematic for high-speed sewing machines.
  • the invention has for its object to provide a low-wear lifting drive for the top conveyor.
  • the temporal position of the slow movement phase of the lifting movement can also be adjusted to a certain extent, so that this movement phase can be optimally adapted to the sequence of the foot placement movement.
  • a guide rocker 3 is mounted by means of a bolt 2, in which a needle bar 4 is guided for upward and downward movement.
  • the drive of the needle bar 4 removed from an arm shaft 5 is not shown.
  • An upper transport rod 6 is also mounted in the guide rocker 3 and carries an upper transport foot 7 at its lower end.
  • Parallel to the upper transport rod 6, a presser bar 8 is mounted in a guide 9 fixed in the housing in the head 1. At the lower end of the presser bar 8, a presser foot 10 is attached.
  • Both rods 6 and 8 are each connected by a link 11, 12 at their upper end to a triangular lever 13 which is connected to a rod 15 via a further link 14.
  • the rod 15 consists of a lower rod part 16 and an upper rod part 17, which are connected to one another by a collar 18.
  • the upper rod part 17 is guided in a guide sleeve 19 which is screwed into the head 1 of the sewing machine.
  • a spring 21 mounted on the upper rod part 17 is arranged between the collar 18 and a constriction 20 in the guide sleeve 19.
  • the movements of the upper transport foot 7 and the presser foot 10 are generated by an eccentric drive.
  • an eccentric 25 is attached to the arm shaft 5, which engages on a bolt 27 via an eccentric rod 26 (see also FIG. 2).
  • the bolt 27 is pivotally mounted about a bolt 29 by means of a link 28 and is connected via a further link 30 to a bolt 31 which is fastened on an arm 32 of an angle lever 33.
  • the angle lever 33 is mounted in the housing broadening 23 and has a second arm 35 equipped with an arch slot 34.
  • An articulated screw 36, to which a link 37 is connected, is adjustably fastened in the arch slot 34.
  • the link 37 engages a rocker arm 38, one end of which is mounted on the housing extension 23 and the other end of which is connected to the triangular lever 13 via a coupling 39.
  • a further eccentric 40 is fastened on the arm shaft 5 and is connected to an arm of a rocker 42 via an eccentric rod 41.
  • the rocker 42 is supported by a bolt 43 in the housing extension 23.
  • Your other arm 42 a is connected via a joint 44 with a coupling 45 and this via a pin 46 with a rocker arm 47.
  • This is mounted in the housing extension 23 by means of a pin 48 (FIG. 3) and carries the bolt 29 at its upper end.
  • the spring 21 (FIG. 1) is supported upward against the constriction 20 of the guide sleeve 19 and presses the triangular lever 13 down over the rod 15 and the handlebar 14. The spring 21 thus generates the required contact pressure of the feet 7 and 10 against a needle plate 49.
  • the drive movement of the eccentric 25 leads to a sinusoidal movement of the bolt 27, which swings in its course of movement through the axis of the pin 48 (FIG. 3) and thus through the bearing axis of the rocker arm 47.
  • the rocker arm 47 is pivoted about its pin 48 via the eccentric 40, the eccentric rod 41, the rocker 42 and the coupling 45.
  • the joint 44 is pivoted over the extended position of the coupling 45 and the associated arm 42 a of the rocker 42 to M (FIG. 2) into two end positions A and B which are located approximately the same distance from the extended position.
  • the coupling 45 pivots the rocker arm 47 between two extreme positions L and R.
  • the dimensions of the parts are selected such that the bolt 29 can be pivoted between the position R in one extreme position and a position only approximated to the position L in the other extreme position.
  • the transmission dimension of the sinus movement predetermined by the eccentric 25 is changed from a maximum amount to a minimum amount above zero.
  • the angle setting of the eccentric 40 relative to the eccentric 25 is selected such that in the movement phases in which the two feet 7 and 10 are seated together on the material to be sewn, the bolt 29 has the coaxial position L or the position approximated to this position relative to the bolt 31 occupies.
  • the normal sinusoidal movement of the feet 7 and 10 is reduced to zero in the movement phases in which one or the other of the two feet 7 and 10 approaches the material, so that a reduction in the placement speed of the feet 7 and 10 results.
  • the oscillation of the angle lever 33 is transmitted with the greatest transmission ratio.
  • the lifting amount of the feet 7 and 10 can be changed in order to be able to adapt the stroke to the thickness of the sewing material.
  • Fig. 4 shows a diagram of the lifting movement designated 0 of the upper feed foot 7 and the lifting movement designated S of the presser foot 10 at a certain setting of the handlebar 37 in the arch slot 34 as a function of the angular position of the arm shaft 5 of the sewing machine.
  • Fig. 5 shows another embodiment of the top feed drive. This embodiment differs only in a modified drive for swinging out the rocker arm 47. In FIG. 5, only the parts that are different from those in FIG. 1 are provided with different reference numbers.
  • a gear 101 is fastened on the shaft 5, which interacts with a gear 102 in a gear ratio of 1: 2.
  • This is fastened on a shaft 105 which is mounted parallel to the shaft 5 in the housing 1 of the machine and carries an eccentric 140.
  • the eccentric 140 is connected directly to the pin 46 of the rocker arm 47 via an eccentric rod 141.
  • the bolt 29 thus also carries out a sinus movement with twice the frequency of the sinus movement of the bolt 27 driven by the eccentric 25, so that the same functional sequence as in the first exemplary embodiment results.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Claims (3)

1. Dispositif d'entraînement supérieur d'une machine à coudre, du type comportant un pied d'avance avec lequel coopère alternativement un pied presseur d'étoffe, et un mécanisme d'entraînement à plusieurs rangs qui, commandé par un excentrique, comprend un mécanisme de point mort travaillant selon une double fréquence et présentant des moyens de transmission d'entrée et des moyens de transmission de sortie du mouvement, et est lié par un levier triangulaire avec le pied d'avance et le pied presseur d'étoffe par l'obtention des mouvements de montée et de descente orientés perpendiculairement à la plaque d'aiguille de la machine à coudre, dont la vitesse tend vers zéro au cours de la phase de montée des pieds, caractérisé en ce que le mécanisme de point mort est constitué par un mécanisme à biellettes (28, 30, 40), qui comporte des seconds moyens (45) de transmission d'entrée du mouvement liés à l'arbre principal (5) de la machine à coudre.
2. Dispositif d'entraînement supérieur selon la revendication 1, caractérisé en ce que l'entraînement entre l'arbre principal (5) et les seconds moyens (45) de transmission d'entrée du mouvement du mécanisme à biellettes (28, 30, 47) comprend un organe de transmission (42, 45, 101).
3. Dispositif d'entraînement supérieur selon l'une quelconque des revendications 1 et 2, caractérisé en ce que le mécanisme à biellette (28, 30, 47) comprend deux biellettes (28, 30) de même longueur, dont l'une (28) est reliée au levier triangulaire (13) et dont l'autre est reliée aux seconds moyens (45) de transmission d'entrée du mouvement, tandis que leur articulation de liaison (27) constitue les premiers moyens de transmission d'entrée de mouvement.
EP80105004A 1980-08-22 1980-08-22 Pied transporteur sur machine à coudre Expired EP0046814B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP80105004A EP0046814B1 (fr) 1980-08-22 1980-08-22 Pied transporteur sur machine à coudre
DE8080105004T DE3070979D1 (en) 1980-08-22 1980-08-22 Feed foot for sewing machine
JP56063539A JPS5745892A (en) 1980-08-22 1981-04-28 Upward feeder for sewing machine
ES502087A ES8302138A1 (es) 1980-08-22 1981-05-11 Disposicion de transporte superior en una maquina de coser
US06/268,154 US4422398A (en) 1980-08-22 1981-05-29 Top feed device for a sewing machine
BR8104186A BR8104186A (pt) 1980-08-22 1981-07-01 Dispositivo de transporte superior em uma maquina de costura

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80105004A EP0046814B1 (fr) 1980-08-22 1980-08-22 Pied transporteur sur machine à coudre

Publications (2)

Publication Number Publication Date
EP0046814A1 EP0046814A1 (fr) 1982-03-10
EP0046814B1 true EP0046814B1 (fr) 1985-08-14

Family

ID=8186763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105004A Expired EP0046814B1 (fr) 1980-08-22 1980-08-22 Pied transporteur sur machine à coudre

Country Status (6)

Country Link
US (1) US4422398A (fr)
EP (1) EP0046814B1 (fr)
JP (1) JPS5745892A (fr)
BR (1) BR8104186A (fr)
DE (1) DE3070979D1 (fr)
ES (1) ES8302138A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3333046C1 (de) * 1983-09-14 1984-05-03 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Stoffdrueckereinrichtung an einer Naehmaschine
DE3448021A1 (de) * 1984-06-28 1986-04-24 Kochs Adler Ag, 4800 Bielefeld Obertransportvorrichtung an einer naehmaschine
DE3423753C2 (de) * 1984-06-28 1987-04-16 Kochs Adler Ag, 4800 Bielefeld Vorrichtung zum Steuern des Greiferfadens einer Doppelkettenstich-Nähmaschine
DE3435633C1 (de) * 1984-09-28 1985-06-20 Dorina Nähmaschinen GmbH, 7500 Karlsruhe Obertransporteinrichtung an Naehmaschinen
DE3724787A1 (de) * 1987-07-27 1989-02-16 Pfaff Ind Masch Naehmaschine mit einer obertransporteinrichtung
DE3724788A1 (de) * 1987-07-27 1989-02-16 Pfaff Ind Masch Obertransporteinrichtung an naehmaschinen
CA2013933A1 (fr) * 1989-06-05 1990-12-05 General Electric Company Turbines au gaz
DE4030269C1 (fr) * 1990-09-25 1992-02-27 Duerkopp Adler Ag, 4800 Bielefeld, De
JPH04314493A (ja) * 1991-04-12 1992-11-05 Brother Ind Ltd ミシンの上送り装置
IT226289Z2 (it) * 1992-02-28 1997-06-02 Rimoldi Srl Gruppo di trasporto superiore amovibile per macchine per cucire
JPH08131678A (ja) * 1994-09-22 1996-05-28 Juki Corp 上送りミシン
WO2001026119A1 (fr) * 1999-10-05 2001-04-12 Koninklijke Philips Electronics N.V. Procede de fabrication d'un filtre, filtre ainsi fabrique et appareil d'analyse aux rayons x
DE202015104412U1 (de) * 2015-08-20 2016-11-22 Dürkopp Adler AG Nähmaschine sowie Nähmaschinen-Baugruppe
CN111434820A (zh) * 2019-01-14 2020-07-21 浙江中捷缝纫科技有限公司 缝纫机
US10961645B2 (en) * 2019-05-10 2021-03-30 L&P Property Management Company Sewing machine with readily adjustable stepping height
US11946182B2 (en) * 2022-02-09 2024-04-02 Steven Marcangelo Sewing machine with adjustable stepping height and related methods

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE109766C (fr) *
US3257980A (en) * 1955-10-29 1966-06-28 Brother Ind Ltd Cam selecting mechanism for sewing machines
DE2620209A1 (de) * 1976-05-07 1977-11-24 Duerkoppwerke Naehmaschinen-obertransportvorrichtung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6926302U (de) * 1969-07-02 1969-11-27 Pfaff Ag G M Obertransportvorrichtung an naehmaschinen
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE109766C (fr) *
US3257980A (en) * 1955-10-29 1966-06-28 Brother Ind Ltd Cam selecting mechanism for sewing machines
DE2620209A1 (de) * 1976-05-07 1977-11-24 Duerkoppwerke Naehmaschinen-obertransportvorrichtung

Also Published As

Publication number Publication date
ES502087A0 (es) 1982-12-16
EP0046814A1 (fr) 1982-03-10
DE3070979D1 (en) 1985-09-19
JPS5745892A (en) 1982-03-16
ES8302138A1 (es) 1982-12-16
BR8104186A (pt) 1982-08-31
JPS6229070B2 (fr) 1987-06-24
US4422398A (en) 1983-12-27

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