EP0219558A1 - Nähmaschine - Google Patents

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Publication number
EP0219558A1
EP0219558A1 EP85113029A EP85113029A EP0219558A1 EP 0219558 A1 EP0219558 A1 EP 0219558A1 EP 85113029 A EP85113029 A EP 85113029A EP 85113029 A EP85113029 A EP 85113029A EP 0219558 A1 EP0219558 A1 EP 0219558A1
Authority
EP
European Patent Office
Prior art keywords
rack
connecting rod
machine
pivoted
zigzag
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Withdrawn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
EP85113029A
Other languages
English (en)
French (fr)
Inventor
Fernando Cuadrado Echeverria
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.)
Maquinas de Coser Alfa SA
Original Assignee
Maquinas de Coser Alfa SA
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 Maquinas de Coser Alfa SA filed Critical Maquinas de Coser Alfa SA
Publication of EP0219558A1 publication Critical patent/EP0219558A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Programme-controlled sewing machines

Definitions

  • Second stepper motor gears up its driving axle with a rack which induces a change in the operation, as from its mean point, of a connecting rod which by its upper side keeps a permanen contact to an eccentric thanks to action of a tension spring, such an accentric being driven by the operation of the main motor of the machine while by its lowest end accounts on a driving shaft for the forward and back motion of the carrying means of the machine, setting out such an axle by virtue of the oscillating motion of connecting rod, an arch which larger or smaller amplitude depends on the said raid po­sitioning and which in turn translates itself into a larger or smaller displacement of said conveyor means.
  • Controlled actuation of both stepper motors named above shall be performed through electronic media and preferably by means of a microprocessor.
  • FIG. 1 it can be seen thereat an elevatio­nal view of a longitudinal section made by a sewing machine which features the developments which are the subject of this invention.
  • a first stepper motor marked with nu­merical reference 1 and a second stepper motor marked with numerical reference 2.
  • Driving shaft 3 of motor 1 operates a reack piece 4 hinged at an end with a middle piece 5, which owns its opposite end likewise hinged with a lever 6 cranked by different points along its length.
  • Said lever 6 fastens itself pivotably to machine chassis by one of its points 7 of elbowing and it has its free end clamped also pivotably, preferably by means of a screw 9 to a piece 8 of suppor­ting of the bar 10 of the needle.
  • Rack piece 4 is driven by its re­ciprocating travel by means of stubs 11 bored in openings made thereat.
  • Second motor 2 has its driving shaft 12 connected to a rack piece 13 through a middle piece 14 allowing this way shifting of posi­tioning of connecting rod 15.
  • Upper end of said connecting rod 15 finds itself urged by the traction of a spring 16, then said connec­ting rod leans itself permanently against an eccentric 17 linked with a shaft 18 which gets motion from the main motor 19 of the machine by means of a belt or another type of transmission.
  • Connecting rod 15 is interlocked by its lowest end to an horizon­tal axle 20 by virtue of which oscillating movement of said connec­ting rod transforms itself into a travel forward and back motion of the carrying device of the machine. Obviously this oscillating move­ment of connecting rod 15 takes place around shaft 14' of the middle piece 14.
  • Shaft 22 driven by the main motor 19 of machine prefarably by means of a belt must provide to carrying device 21 in a known manner the lifting and lowering motion.
  • FIG. 2 is represented a view of ground-plant of machine as per Figura 1 where different components are shown of which constitu­tes the subject of invention and relative position kept thereamong.
  • the connecting rood 15 which rests by its upper side on eccentric 17 fastened to shaft 18, being able such axle 18 to operate, in a known manner, different organs of the machine; posi­tion of stepper motors 1 and 2 and their associated elements and upper clamping of support piece 8 for the needle bar 10 assured by a short axle 23 in relation of which it can pivot.
  • Driving of both motors 1 and 2 shall be independent as above quo­ted, and shall be controlled by electronic means.
  • These electronic means can be known or not, and able to be programmed for the opera­tion in the time of both motors 1 and 2 according to results which attainment should be desirable.
  • motor 1 shall be used to provide a zigzag motion to machine needle.
  • stepper motor duly controlled by the electronic means shall provide to rack 4 a reciprocating move­ment to be transmitted through the middle piece 5 to the end related to cranked lever 6, which opposite end is hinged joint through screw 9 to support 8 of the needle bar. This way reciprocating motion of rack 4 becomes the zigzag movement desired for the needle.
  • This embodiment has the advantage that by means of a minor number of simple elements is possible to come to end the zigzag effect of the needle. It is understandable that a larger or smaller amplitude of the reciprocating motion of rack 4 translates itself respectively in a larger or smaller width of zigzag; then if duly regulated every moment the travel of rack 4 it can be obtained a predetermined shape of zigzag.
  • Stepper motor 2 is in charge of regulating the shifting limits of travelling device of the machine.
  • the above travelling devi­ce is subject to the combination of two movements, i.e., one of lifting-lowering and other of forward-back motion.
  • Lifting-lowering movement is provided in a known manner as above quoted by shaft 22 driven by the main motor of the machine.
  • Forward-back motion is operated by shaft 20 when actuating on such travelling device 21 when driven in turn by the connecting rod 15.
  • actua­ting on motor 2 shall change the position of rack 13 and consequently connecting rod shall be shifted altering the distance existing between shaft 14' of pivoting and the contact point of connecting rod 15 and eccentric 17 resulting in a variation of the amplitud of the arch drawn by the lowest end of connecting rod 15 and by axle 20 resulting in a larger or smaller travelling of carrying device, as the case may be.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Transmission Devices (AREA)
EP85113029A 1984-07-26 1985-10-14 Nähmaschine Withdrawn EP0219558A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES54363384 1984-07-26

Publications (1)

Publication Number Publication Date
EP0219558A1 true EP0219558A1 (de) 1987-04-29

Family

ID=8489288

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113029A Withdrawn EP0219558A1 (de) 1984-07-26 1985-10-14 Nähmaschine

Country Status (2)

Country Link
EP (1) EP0219558A1 (de)
ES (1) ES534633A0 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2702488A1 (de) * 1976-01-22 1977-07-28 Janome Sewing Machine Co Ltd Elektrische, automatische, muster naehende naehmaschine
FR2391303A1 (fr) * 1977-05-17 1978-12-15 Husqvarna Ab Machine a coudre avec moteur a etages regle en position initiale
EP0032485A1 (de) * 1980-01-15 1981-07-22 Husqvarna Aktiebolag Zigzag-Mechanismus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2702488A1 (de) * 1976-01-22 1977-07-28 Janome Sewing Machine Co Ltd Elektrische, automatische, muster naehende naehmaschine
FR2391303A1 (fr) * 1977-05-17 1978-12-15 Husqvarna Ab Machine a coudre avec moteur a etages regle en position initiale
EP0032485A1 (de) * 1980-01-15 1981-07-22 Husqvarna Aktiebolag Zigzag-Mechanismus

Also Published As

Publication number Publication date
ES8505430A1 (es) 1985-05-16
ES534633A0 (es) 1985-05-16

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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

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17P Request for examination filed

Effective date: 19860312

AK Designated contracting states

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

17Q First examination report despatched

Effective date: 19880315

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: 19880926

RIN1 Information on inventor provided before grant (corrected)

Inventor name: CUADRADO ECHEVERRIA, FERNANDO