EP0224203B1 - Control apparatus of speed, position and specific functions for industrial sewing machines - Google Patents

Control apparatus of speed, position and specific functions for industrial sewing machines Download PDF

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Publication number
EP0224203B1
EP0224203B1 EP86116103A EP86116103A EP0224203B1 EP 0224203 B1 EP0224203 B1 EP 0224203B1 EP 86116103 A EP86116103 A EP 86116103A EP 86116103 A EP86116103 A EP 86116103A EP 0224203 B1 EP0224203 B1 EP 0224203B1
Authority
EP
European Patent Office
Prior art keywords
control apparatus
speed
computer
coil
industrial sewing
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
EP86116103A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0224203A2 (en
EP0224203A3 (en
Inventor
Giuseppe Bocca
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.)
ELEMAC SpA
Original Assignee
ELEMAC SpA
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 ELEMAC SpA filed Critical ELEMAC SpA
Priority to AT86116103T priority Critical patent/ATE67534T1/de
Publication of EP0224203A2 publication Critical patent/EP0224203A2/en
Publication of EP0224203A3 publication Critical patent/EP0224203A3/en
Application granted granted Critical
Publication of EP0224203B1 publication Critical patent/EP0224203B1/en
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D05B69/14—Devices for changing speed or for reversing direction of rotation
    • D05B69/18—Devices for changing speed or for reversing direction of rotation electric, e.g. foot pedals

Definitions

  • the present invention relates to control apparatus of speed, position and specific functions for industrial sewing machines.
  • the present invention refers to control apparatus of speed, position and special functions for industrial sewing machines, realized with a digital technique having an input with variable inductance.
  • the input i.e. the transduction of the controlled pressure exerted by the operator on the machine treadle
  • the various tracks incised on the photographic cams acting as so many optic switches, transmit the various signals to the machine for the speed, position of the needle, pressure foot, threadcutter, etc.
  • the brake-clutch unit which is the principal organ, is controlled with the same technique according to the characteristics of each embodiment, for which a tiresome adjustment and line-up of several parts is required.
  • the control apparatus disclosed in the reference operates by the variation of a magnetic field.
  • WO-84 02933 discloses an electronic controlling equipment for driving systems, with electromagnetic compling for industrial sewing and/or overcasting machines, using a variable inductance input.
  • the variable inductance input is generated by a control device comprising a ferromagnetic shaft driven by the operator and performing the inductive coupling between two coils: the primary coil supplied by a rectangular voltage generator and the secondary coil whose supply depends on the inductive coupling between the two coils by the ferromagnetic shaft.
  • the variable inductance input is the voltage amplitute which cannot be directly applied to a digital circuit, but needs first to be transformed into a digit or numerical binary entity by an electronic circuit.
  • the object of the present invention is to provide a control apparatus of speed, position and special functions for industrial sewing machines using a digital technique, which does not exhibit the above mentioned problems and drawbacks.
  • control apparatus of speed, position and special functions for industrial sewing machines by using a digital technique
  • said control apparatus comprising a variable inductance input generated by a coil intersected by a core driven by a lever connected to the sewing machine treadle.
  • the connection between the lever and the sewing machine treadle is obtained by a system of rods and levers.
  • Said inductance outputs are transmitted to the electrovalves, dedicated to various service operations, such as stopping of the machine, activation of a threadcutter or the pressure treadle, reverse gear or positioning of the needle, etc. through : an electronic computer with numerical display, for the processing of impulses deriving from the spool itself; a technical panel and synchronizer forming an integral part of the main camshaft of the sewing machine; and an electrovalve power actuator.
  • the power actuator sets into motion the various electrovalves dedicated to the various working stages.
  • the advantages obtained from the present invention consist mainly in the fact that since the input does not necessitate specific optic or contact switches and employs only differentiated impulses or signals generated from the linear variation of inductance of a coil intersected by a rod, it gives a high electrical reliability due to an almost total absence of mechanical wear.
  • the synchronizer being provided with a single standard disk, may be applied to a great number of sewing machine types or makes, even with construction characteristics different one from the other and permits, moreover, thanks to the digital technique adopted herein, extremely accurate and lasting controls and adjustments.
  • control apparatus of speed, position and specific functions for sewing machines realized using a digital technique, with variable induction input comprises an input having variable induction 7, a computer 8 with display 9, a technical panel 10, operator panel 11, an electrovalve power actuator 12, a brake-clutch group regulator 14 placed upstream of the brake-clutch group 13 and the motor 15, and a synchronizer 16.
  • the input with variable inductance 7 comprises a coil 1 intersected by a core 2; a lever 3, driven by a machine treadle, and which moves said shaft 2 inside the coil 1; a return spring 4 which keeps the lever 3 in the lower downstroke position and an adjustable screw 5 which sets the stroke of the lever 3.
  • the position and speed transducer unit comprising a coil 1 containing a sliding rod 2
  • a casing made of sheet steel or cast aluminium or other material suitable for the purpose.
  • the lever 3 is driven by the treadle through a system of rods not shown in the figure.
  • the varying controlled pressure exerted by the operator on the treadle, forming part of the unit 7 comprises an angular shifting of the lever 3 which then acts on the core 2 sliding in the coil 1, causing variations in continuous inductance inside the same, corresponding to each position that the core 2 moves into.
  • the display 9 placed so as to be under the operator's immediate control, permits a continuous check, in the form of numbers, on the sewing machine camshaft positions.
  • the initial setting of the technical panel 10 is carried out just once at the beginning and subsequently memorized by the computer. This operation is facilitated by appropriate symbols or reference points present on the same panel 10. This permits setting of the starting point for all subsequent adjustments, regardless of the type of machine being used.
  • Use of the computer and digital technique make it possible to set one or more positions of the machine camshaft and memorization of same ; moreover, it is used to drive the brake-postion group by means of a regulator 14 and sets accurately the maximum machine speed, which consequently cannot be exceeded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Control Of Electric Motors In General (AREA)
EP86116103A 1985-11-26 1986-11-20 Control apparatus of speed, position and specific functions for industrial sewing machines Expired EP0224203B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86116103T ATE67534T1 (de) 1985-11-26 1986-11-20 Fusshebel fuer naehmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT22993/85A IT1186398B (it) 1985-11-26 1985-11-26 Apparecchiatura di controllo di velocita',di posizione e di funzioni specifiche per macchine da cucire industriali,relizzata in tecnica digitale con "input" a variazione di induttanza
IT2299385 1985-11-26

Publications (3)

Publication Number Publication Date
EP0224203A2 EP0224203A2 (en) 1987-06-03
EP0224203A3 EP0224203A3 (en) 1988-02-10
EP0224203B1 true EP0224203B1 (en) 1991-09-18

Family

ID=11202657

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86116103A Expired EP0224203B1 (en) 1985-11-26 1986-11-20 Control apparatus of speed, position and specific functions for industrial sewing machines

Country Status (5)

Country Link
EP (1) EP0224203B1 (it)
AT (1) ATE67534T1 (it)
DE (1) DE3681563D1 (it)
ES (1) ES2021564T3 (it)
IT (1) IT1186398B (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69121386T2 (de) * 1991-03-27 1996-12-19 Comelz Spa Steuerungseinheit für einen elektrischen Antriebsmotor einer industriellen Verarbeitungsmaschine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57208881A (en) * 1981-06-15 1982-12-22 Matsushita Electric Ind Co Ltd Driving system for sewing machine
RO82939A2 (ro) * 1983-01-24 1985-10-31 Institutul De Cercetare Stiintifica Si Inginerie Tehnologica Pentru Industria Electrotehnica,Ro Instalatie electronica de comanda a sistemelor de comanda a sistemelor de actionare cu cuplaje electromagnetice pentru masini industriale de cusut si/sau surfilat

Also Published As

Publication number Publication date
ES2021564A4 (es) 1991-11-16
ES2021564T3 (es) 1992-04-01
EP0224203A2 (en) 1987-06-03
IT1186398B (it) 1987-11-26
IT8522993A0 (it) 1985-11-26
ATE67534T1 (de) 1991-10-15
EP0224203A3 (en) 1988-02-10
DE3681563D1 (de) 1991-10-24

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