EP0020184B1 - Nähmaschinen mit automatischer Werkstückführung - Google Patents

Nähmaschinen mit automatischer Werkstückführung Download PDF

Info

Publication number
EP0020184B1
EP0020184B1 EP80400271A EP80400271A EP0020184B1 EP 0020184 B1 EP0020184 B1 EP 0020184B1 EP 80400271 A EP80400271 A EP 80400271A EP 80400271 A EP80400271 A EP 80400271A EP 0020184 B1 EP0020184 B1 EP 0020184B1
Authority
EP
European Patent Office
Prior art keywords
presser
speed
length
piece
stitch length
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
EP80400271A
Other languages
English (en)
French (fr)
Other versions
EP0020184A1 (de
Inventor
Gérard Biotteau
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
Biotteau Gerard
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 Biotteau Gerard filed Critical Biotteau Gerard
Priority to AT80400271T priority Critical patent/ATE2854T1/de
Publication of EP0020184A1 publication Critical patent/EP0020184A1/de
Application granted granted Critical
Publication of EP0020184B1 publication Critical patent/EP0020184B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/22—Work-feeding means with means for setting length of stitch
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B35/00—Work-feeding or -handling elements not otherwise provided for
    • D05B35/10—Edge guides
    • D05B35/102—Edge guide control systems with edge sensors
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D05B69/20—Control devices responsive to the number of stitches made
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2207/00—Use of special elements
    • D05D2207/02—Pneumatic or hydraulic devices

Definitions

  • the present invention relates to sewing machines comprising an automatic workpiece guiding device.
  • this guide device is to automatically rotate the part in an anti-clockwise direction when the edge of the part to be "joined” or "bordered” has a convex curvature.
  • connect is meant the assembly by a border stitching of two superimposed pieces and by “border” the application of a loop folded astride the edge of the piece.
  • Guidance is, in general, in the device described in this French patent and in its Certificate of Addition as well as in the devices proposed, for example, in American patents N ° 2,971,483, 3,598,070 and 3,752 .097, provided by a presser which comes to bear on the part at the theoretical center of rotation while the part continues to be driven by the claws and the needle or other driving devices depending on the type of machine.
  • the pressing of the presser is controlled by a detector, either mechanical or with a photocell, which detects the apparent movement, in the direction of the presser, of the edge of the part.
  • this guidance device is analyzed in detail in the French Addition Certificate No. 76 11707.
  • This addition certificate describes in detail the operation of a guidance device which makes it possible to perform within 5 millimeters of the edge of the part and for example 3 millimeters from the edge thereof, a puncture whose layout has convex curves with a radius of less than twenty millimeters, this radius being able to descend to about 7 to 8 millimeters. It is however indicated in this Certificate of Addition that the device "ensures a constant radius of curvature with a slight tightening of the point which is slightly shorter in the curved area, the stress imposed on the material being released during the release period of needle and drive ".
  • the object of the present invention is to remedy this defect in a simple manner.
  • the guide device mounted in a known manner on a sewing machine comprising a device for adjusting the stitch length and a device for adjusting the operating speed of the machine, is characterized by a device for increase in the length of the stitch and by a device for reducing the speed of the workpiece drive both controlled by the actuation of the guide presser.
  • the length of the needle pitch and positive drive devices such as the prongs is increased, this lengthening having to correspond substantially to the amplitude of the "backtracking" of the material constituting the part.
  • the combination of these two factors "training on a greater pitch” and “backward retracing” should theoretically lead to a practical length of the point in the curved parts of the bite substantially uniform and equal to that of the point in the straight parts.
  • the "backtrack” varies according to the nature of the material on which the stitching is carried out and also varies according to the nature of the thread used and the length of the stitch.
  • the control device for varying the length of the stitch acting by all or nothing because it is controlled by whether the guide presser is pressed or not it is preferable to provide in the transmission an adjustment of the ratio between the stroke of the control member and the stroke of the controlled member for adjusting the length of the stitch or of providing a member such as a stop for limiting the stroke of the member adjustment of the stitch length to be able to take these particular factors into account. This adjustment can be made by trial and error during the general adjustment for a series of parts.
  • the presser control device also controls a reduction in the speed of the drive devices of the part such as the needle and the claws, that is to say in practice of the general drive motor of the machine.
  • control members of the same type as that ensuring the pressing of the presser can, therefore, be constituted by a pneumatic or hydraulic cylinder in combination with an electromechanical valve or an electromagnet with or without mechanical transmission.
  • Figures 1 to 4 show a stitching 1 made on the corner of a shoe tongue 2 in sheepskin lined textile.
  • the stitching is carried out using a machine equipped with a guiding device such as that described in the request for French Certificate of Addition N ° 76 11707, the length of the stitch being adjusted to 3 mm.
  • the length of the stitch is regular and the stitching follows a correct line.
  • the stitching is carried out on the same machine as the stitching in FIG. 1, but the latter is provided with a device for modifying the length of the stitch.
  • the length of the stitch is increased from 3 mm to 4.5 mm.
  • FIG. 3 The injection of FIG. 3 is carried out on the same machine as that of FIG. 1, said machine having been provided with a speed adjustment device which makes it possible to reduce the speed of the machine from 3000 points / minute to 900 points / minute when pressing the presser at 3.
  • the line obtained in c "and d" is regular but the length of the point decreases progressively from the entry towards the exit of the zone, the average length falling to a millimeter which does not give a regular puncture.
  • the stitching is carried out on the same machine as that of FIG. 1.
  • the machine is provided with a device allowing both the modification of the length of the stitch and the adjustment of the speed. in accordance with the present invention.
  • the length of the stitch was increased from 3 mm to 4.5 mm and the machine speed which was 3000 points / minute was reduced during the pressing of the presser to 900 points / minute.
  • the curve of the stitching which had a radius of curvature of 6 mm does not present any irregularity and the length of the point remained constant.
  • the reference 10 designates the input of the signal from the detector which controls the descent of the rotary feeler 11
  • 12 designates the input of the signal from the detector which controls the raising of the feeler 11.
  • the reference 13 designates the needle
  • the reference 14 the crowbar
  • the reference 15 the feed dogs
  • the reference 1 6 the needle plate
  • the reference 17 the photocell constituting the rotation control detector
  • the reference 18 the cell photoelectric starting and stopping of the engine of the machine
  • the reference 19 the engine and the reference 20 the electronic member for controlling the speed of the engine.
  • FIG. 5 represents the overall diagram of the modification in accordance with the invention as regards the adjustment of the length of the stitch.
  • the reference 21 designates the lever of the cursor of the machine which controls the length of the stitch, this lever moving towards the + to increase the length of the stitch and towards the - to shorten it.
  • the normal length of the stitch is adjusted by a micrometric stop 22 and the maximum length by the position of the knurled nut 23 on the lever 21, the lever being biased towards the "long” points by a spring 24 and towards the “short” points "by a jack 25 supplied by a valve 26 controlled by a switch 27 from the input 12 of the presser raising control 11.
  • the device consists essentially of two adjustable potentiometers 28 and 29 inserted in the power supply of the electronic member 20 for controlling the speed of the motor 19.
  • the potentiometer 28 corresponds to slow speed and it is switched on by a relay 30 when the presser 11 is pressed by an entry at 10. When no entry exists on 10 it is the potentiometer 29 of fast speed which is in circuit.
  • the manual contactor 31 enables the device to be switched on or off.
  • a second or more speed adjustment assemblies 28 ′, 29 ′, 30 ′, 31 ′ may be provided when the puncture layout includes areas where the maximum speed must be reduced to achieve a curved puncture with a large radius of curvature separating zones with a small radius of curvature, the selection being carried out manually with the contactors 31, 31 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Claims (5)

1. Nähmaschine mit Führungsautomat für das Arbeitsteil, im wesentlichen bestehend aus einem Presskopf, der so auf das in der Bearbeitung befindliche Teil drückt, daß das betreffende Teil gedreht wird, wobei dieses Andrücken des Presskopfes von einem Detektor gesteuert wird; diese Nähmaschine umfasst auch einen Stichlängenregler und einen Regler für die Arbeitsgeschwindigkeit der Maschine, dadurch gekennzeichnet, daß sie Vorrichtungen umfasst, die den Stichlängenregler und den Regler der Mitnahmegeschwindigkeit des Arbeitsteils beim Einsatz des Führungspresskopfes so steuern, daß während des Andrückens des Presskopfes die Stichlänge vergrößert und die Geschwindigkeit herabgesetzt wird.
2. Nähmaschine mit Führung gemäß Anspruch 1, dadurch gekennzeichnet, daß die Steuerung bei jedem Regler durch ein Steuerglied des gleichen Typs wie dasjenige gewährleistet wird, das für das Andrücken des Presskopfes sorgt.
3. Nähmaschine mit Führung gemäß Anspruch 2, dadurch gekennzeichnet, daß das Steuerglied aus einer pneumatischen oder hydraulischen Winde in Zusammenwirkung mit einem elektromechanischen Ventil oder einem Elektromagneten mit oder ohne mechanische Übertragung besteht.
4. Nähmaschine mit Führung gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß sie einen Regler für das Verhältnis zwischen dem Hub des Steuergliedes und dem Hub des gesteuerten Stichlängenreglers umfasst.
5. Nähmaschine mit Führung gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß sie ein Organ, beispielsweise einen Anschlag, zur Begrenzung des Stichlängenreglers umfasst.
EP80400271A 1979-05-11 1980-02-27 Nähmaschinen mit automatischer Werkstückführung Expired EP0020184B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80400271T ATE2854T1 (de) 1979-05-11 1980-02-27 Naehmaschinen mit automatischer werkstueckfuehrung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7912011A FR2456156B1 (fr) 1979-05-11 1979-05-11 Perfectionnement aux machines a coudre comportant un dispositif de guidage automatique de la piece
FR7912011 1979-05-11

Publications (2)

Publication Number Publication Date
EP0020184A1 EP0020184A1 (de) 1980-12-10
EP0020184B1 true EP0020184B1 (de) 1983-03-23

Family

ID=9225356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80400271A Expired EP0020184B1 (de) 1979-05-11 1980-02-27 Nähmaschinen mit automatischer Werkstückführung

Country Status (8)

Country Link
US (1) US4312286A (de)
EP (1) EP0020184B1 (de)
AT (1) ATE2854T1 (de)
BR (1) BR8002825A (de)
DE (1) DE3062392D1 (de)
ES (1) ES489941A1 (de)
FR (1) FR2456156B1 (de)
PT (1) PT71034A (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3314717C1 (de) * 1983-04-22 1984-02-09 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Naehmaschine mit mindestens einem Stoffschieber und einer Fuehrungsvorrichtung zum selbsttaetigen Herstellen einer kurvenfoermigen,randparallelen Naht
GB8316899D0 (en) * 1983-06-22 1983-07-27 British United Shoe Machinery Folding machines
US4589363A (en) * 1984-10-06 1986-05-20 Pfaff Industriemaschinen Gmbh Sewing machine for automatically making edge-parallel seams
US4682553A (en) * 1985-02-21 1987-07-28 Institut Textile De France Sewing machine workpiece edge alignment apparatus
FR2585378B2 (fr) * 1985-07-26 1988-01-08 Inst Textile De France Installation perfectionnee de traitement lineaire d'un bord d'une piece souple telle qu'une piece textile
SE457645B (sv) * 1986-03-11 1989-01-16 Husqvarna Ab Anordning foer hastighetsreglering i symaskin foersedd med reglage foer stygnlaengd och varvtal

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE538934A (de) * 1954-06-15
US3139051A (en) * 1962-08-21 1964-06-30 Wayne G Story Sewing machine universal feed arrangement
US3609373A (en) * 1970-05-18 1971-09-28 Singer Co Photoelectric sensors and circuitry for edge-guiding systems for sewing machines
US3742879A (en) * 1970-12-03 1973-07-03 Usm Corp Automatic work guidance mechanism
IT987773B (it) * 1973-05-22 1975-03-20 Virginio Rimoldi E C Spa Perfezionamenti ad una apparec chiatura per guidare e cucire strati di tessuto lungo un bor do comunque sagomato
DE2608859C2 (de) * 1976-03-04 1983-10-13 Dürkoppwerke GmbH, 4800 Bielefeld Verstellvorrichtung mit Steuermitteln für die Vorschubgröße einer Nähmaschine
FR2348993A2 (fr) * 1976-04-21 1977-11-18 Eram Chaussures Dispositif de guidage automatique de la piece sur une machine a coudre
US4100864A (en) * 1977-01-17 1978-07-18 Usm Corporation Automatic work guidance mechanism

Also Published As

Publication number Publication date
PT71034A (fr) 1980-04-01
FR2456156B1 (fr) 1985-05-31
US4312286A (en) 1982-01-26
FR2456156A1 (fr) 1980-12-05
DE3062392D1 (en) 1983-04-28
ES489941A1 (es) 1980-10-01
EP0020184A1 (de) 1980-12-10
BR8002825A (pt) 1980-12-16
ATE2854T1 (de) 1983-04-15

Similar Documents

Publication Publication Date Title
EP1778456B1 (de) Verfahren und vorrichtung zur ultraschallverarbeitung einer materialbahn
EP0020184B1 (de) Nähmaschinen mit automatischer Werkstückführung
FR2624889A1 (fr) Machine a coudre destinee a la couture commandee d'un ruban
FR2615819A1 (fr) Appareillage de commande d'une machine a sangler
FR1258154A (fr) Machine à coudre à points de chaînette réguliers
FR2562829A1 (fr) Dispositif de commande de relevage et de translation du chariot d'une machine a deborder et a biseauter les verres de lunettes
BE884560A (fr) Appareil de cerclage a fusionnement par frottement a commande entierement electrique
EP1000189B1 (de) Nähverfahren und nähmaschine die das freimachen einer ziehschnur aus einer durch eine nähnaht geformte passage ermöglicht
EP1297204B1 (de) Vorrichtung und verfahren zum schneiden von filamentlunten aus thermoplastischen material
FR2794775A1 (fr) Appareil pour inserer un fil de liaison dans un tissu tridimensionnel
BE1011429A3 (fr) Metier a tricoter circulaire.
WO1997047797A1 (fr) Dispositif de guidage de materiau a coudre applique au droit du pied-presseur, procede de couture automatique et machine a coudre
FR2631985A1 (fr) Dispositif de chargement de garnitures de type ruban sous le pied presseur d'une machine a coudre
EP0359707A1 (de) Vorrichtung zur Spannunsregelung eines sich lotrecht bewegenden Fadens und Verwendung einer solchen Vorrichtung
EP0374059A1 (de) Fadenspanneinrichtung für Textilmaschinen
FR1464320A (fr) Ouvre-boîte actionné électriquement
FR2594303A1 (fr) Procede de couture permettant de prevoir et de fixer des boucles fermees sur une zone d'une piece textile et installation de couture autorisant la mise en oeuvre dudit procede
FR2568503A3 (fr) Machine-outil comprenant une tete d'usinage avec un dispositif de changement rapide des outils.
FR2478148A1 (fr) Dispositif pour separer a l'aide d'un fil metallique porte au rouge des pieces formant chapelet assemblees a plat et sur lesquelles ont ete realisees des piqures droites continues, et machine a coudre possedant un tel dispositif
EP0351304A1 (de) Vorrichtung zum Anhalten der Lieferung eines an einer Spinnmaschine angeordneten Streckwerks bei Abwesenheit des Fadens am Streckwerkausgang
FR2588577A1 (fr) Procede pour ravaler le bout de fil libre de l'aiguille d'une machine a coudre et machine pour la mise en oeuvre du procede
CH292158A (fr) Machine pour la confection de lames de scie.
BE471049A (de)
BE366610A (de)
FR2563761A1 (fr) Presse perfectionnee a decouper, a bras pivotant

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

AK Designated contracting states

Designated state(s): AT BE CH DE GB IT LU NL SE

17P Request for examination filed

Effective date: 19810521

ITF It: translation for a ep patent filed

Owner name: ING. ZINI MARANESI & C. S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH DE GB IT LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19830323

Ref country code: NL

Effective date: 19830323

REF Corresponds to:

Ref document number: 2854

Country of ref document: AT

Date of ref document: 19830415

Kind code of ref document: T

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19830401

REF Corresponds to:

Ref document number: 3062392

Country of ref document: DE

Date of ref document: 19830428

ITPR It: changes in ownership of a european patent

Owner name: CESSIONE;PFAFF INDUSTRIEMASCHINEN GMBH

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19840126

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19840229

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19840331

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19850213

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19860303

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Effective date: 19880229

BERE Be: lapsed

Owner name: BIOTTEAU GERARD

Effective date: 19880228

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19881101

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881118

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19890228

ITTA It: last paid annual fee
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT