EP0335998A1 - Dispositif pour la formation de la foule dans les métiers à tisser - Google Patents

Dispositif pour la formation de la foule dans les métiers à tisser Download PDF

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Publication number
EP0335998A1
EP0335998A1 EP88105529A EP88105529A EP0335998A1 EP 0335998 A1 EP0335998 A1 EP 0335998A1 EP 88105529 A EP88105529 A EP 88105529A EP 88105529 A EP88105529 A EP 88105529A EP 0335998 A1 EP0335998 A1 EP 0335998A1
Authority
EP
European Patent Office
Prior art keywords
actuators
abutment bodies
plate
bodies
reproduced
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Withdrawn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
EP88105529A
Other languages
German (de)
English (en)
Inventor
Carlo Ugoccioni
Angelo Pavesi
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.)
FRETTE SpA
Original Assignee
FRETTE 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 FRETTE SpA filed Critical FRETTE SpA
Priority to EP88105529A priority Critical patent/EP0335998A1/fr
Publication of EP0335998A1 publication Critical patent/EP0335998A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/20—Electrically-operated jacquards
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C13/00—Shedding mechanisms not otherwise provided for

Definitions

  • the present invention relates to a device for forming the shed on weaving looms.
  • the perforation is performed so as to have, on the nodes of the grid, which correspond with the hooks, the punched hole, which corresponds to the empty square of the drawing to be reproduced, or the unpunched cardboard, which corresponds to the full square of the drawing to be reproduced.
  • the length of the punched tape depends on the extension of the drawing in terms of the number of required wefts, and in many cases it assumes even considerably large dimensions.
  • the punched tapes thus produced are stored in appropriate rooms from which they are retrieved at the moment of use.
  • the tape When the tape is to be used, it is inserted in a reading apparatus which is usually located above the weaving loom.
  • the reader automatically performs the advancement of the perforated tape, which is carried out in steps, each step corresponding to a weft of the fabric and being synchronized with a feeler exploration bed constituted by a set of needles placed at the nodes of the abovementioned grid.
  • each needle explores the tape at each stroke of the loom so that each individual needle may find on the cardboard tape it is exploring an empty portion or a full portion which correspond, as described above, to the drawing to be reproduced in the fabric.
  • each needle controls, by means of a system of escapements and levers, the position of a hook connected by means of cables to one or more loops in which pass the warp threads originating from the cloth beam.
  • the transfer onto squared paper is the most important phase for performing corrections and/or modifications on the original drawing to take into account the requirements of the customer and of the subsequent phases which current technology imposes.
  • the corrections must be performed manually with the related burden of costs and possible errors.
  • the tape constitutes a scarcely reliable, though very expensive, support, since it is bulky, heavy, easily subject to deterioration and must be stored in appropriate rooms and preserved from any damage (fire, humidity, etc.).
  • the tape can be reproduced only by means of a copying operation performed with the abovementioned punching apparatus, with all the costs, slowness and disadvantages which derive therefrom.
  • the prior art also entails a hardly negligible time to be spent in the operations of loading and unloading the punched tape on the reader, located above the weaving loom, every time said loom is to produce a fabric with a different drawing or inscription.
  • This operation performed by a specific team of operators, is not only onerous in itself, but generally entails a considerably long idle time.
  • the aim of the present invention is indeed to eliminate the above described disadvantages by providing a device for forming the shed on weaving looms which allows the elimination of the use of punched tape to obtain any type of drawing or inscription, even of the TV, electronic or similar type, to be reproduced on the fabric, without thereby having to modify the original weaving loom.
  • a particular object of the invention is to provide a device which allows the direct use of the electronic image of the original drawing for the control of the needles located on the conventional punched tape reader, but without having to use the punched tape, thereby eliminating all the operations of perforation and subsequent reading of the punched tape.
  • Still another object of the present invention is to provide a device which allows the complete elimination of the problems and difficulties related to the handling of punched tapes, such as their preservation and storage.
  • Another object of the present invention is to provide a device which allows the image or design woven by a loom to be changed or substituted by a different image in an extremely short time, without having to employ skilled personnel and without performing particular modifications to the machines.
  • a not least object of the present invention is to provide a device which, by virtue of its peculiar constructive characteristics, is capable of giving the greatest assurances of reliability and safety in use.
  • a device for forming the shed on weaving looms of the type comprising feeler needles arranged in a working zone
  • said device being characterized in that it comprises a plurality of abutment bodies, a plurality of actuators, and at least one plate, said plurality of abutment bodies being arranged in correspondence with said feeler needles,slidably supported by said plate and operatively connected to said plurality of actuators, said plate being removably fixable beneath said working zone, said plurality of actuators being adapted for causing sliding movement of said abutment bodies, located remote from said abutment bodies, and driven by an actuation assembly, said actuation assembly being adapted for processing images to be reproduced on woven fabric.
  • the device for forming the shed on weaving looms comprises the plurality of abutment bodies 1 substantially having a cylindrical configuration, which are slidably accommodated in corresponding cylindrical seats 2, defined in a plate 3 which is applicable to the mounting couplings which are used for the application of the conventional cylinder for the traction of the punched tape on the loom, generally indicated by 4.
  • the cylindrical bodies 1 and the corresponding seats 2 are arranged complementarily with respect to the working zone of the feeler needles 5 of the weave machine and in practice replace the conventional holes provided on perforated tape.
  • the abutment body 1 can be located, as illustrated in figure 2, in a recessed position, and in practice provides the position corresponding to a hole of conventional punched tape.
  • the bodies 1 are also arrangeable, as will become apparent hereinafter, so as to be flush with the plate 3, consequently closing the cylindrical seat 2, providing the full portion of the conventional punched tape which, in this case, is not used.
  • Each body 1 is connected to a flexible cable 6 which is slidably guided in a flexible sheath 7 inserted at one end in the plate 3 and associated, at the other end, with a supporting plate or framework indicated by the reference numeral 10.
  • the flexible cable 6, slida ble inside the sheath 7, is rigidly associated at its other end with the core 11 of a linear electromagnetic actuator 12, supported by a bracket 15, which is in turn connected to an electronic card 20 which constitutes a printed circuit board whereon the electronic components 21, assigned to the control of the electromagnetic actuators 12, are mounted.
  • Said cards or boards 20 are in turn associated with a supporting framework 25, which is mounted on a supporting stand 26, enclosed in a dust-proof container.
  • connections of the individual boards lead, by means of a multipolar cable 30, to an assembly 31 which contains the electric power supplies of the system and the interface with the read unit 32, to which it is connected by means of a cable 33.
  • a synchronization cable 34 is furthermore provided which connects the read unit to the weaving loom to obtain operational synchronization.
  • the structural arrangement adopted above is extremely important since it allows to arrange, in the extremely small space which in practice corresponds to the region where the punched tape traction cylinder was traditionally applied, a plurality of abutment bodies which provide the same functionality, with the advantage that, by virtue of the connection of the flexible cable, the various actuators, which necessarily have considerable dimensions, can be located in a remote region without particular problems of space and dimensions.
  • the support of the required electronic image into the read unit of the data processor 32, which can operate with a support of the magnetic disk or tape type, which sends the signals corresponding to the position of the individual hooks.
  • the signals through the connection constituted by the cable 30, reach the electronic circuits provided on the boards 20, which drive the various actuators 12 which, if triggered, expel the core 11, which by sliding pushes the flexible cable 6.
  • the cable is slidably guided in the sheath 7 and acts on the various abutment bodies which reach the outer level of the plate, while the contrast bodies connected to untriggered actuators remain considerably below the outer face of the plate, thus allowing the feeler needles 5 to descend into the free holes constituted by the cylindrical seats 2, corresponding to untriggered actuators, while the feeler needles are blocked by the abutment bodies 1 which are connected to triggered actuators.
  • the cycle is repeated, thus allowing the loom to form the shed according to the signals stored in the reader 32 and transferred therein by means of magnetic tape or disk. In this manner the need for paper-setting and for the perforation of the drawings to be reproduced on the fabric is eliminated, and the possibility is allowed of making full use of the already existing weaving loom.
  • the materials employed, as well as the contingent shapes and dimensions may be any according to the requirements.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP88105529A 1988-04-07 1988-04-07 Dispositif pour la formation de la foule dans les métiers à tisser Withdrawn EP0335998A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP88105529A EP0335998A1 (fr) 1988-04-07 1988-04-07 Dispositif pour la formation de la foule dans les métiers à tisser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88105529A EP0335998A1 (fr) 1988-04-07 1988-04-07 Dispositif pour la formation de la foule dans les métiers à tisser

Publications (1)

Publication Number Publication Date
EP0335998A1 true EP0335998A1 (fr) 1989-10-11

Family

ID=8198868

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88105529A Withdrawn EP0335998A1 (fr) 1988-04-07 1988-04-07 Dispositif pour la formation de la foule dans les métiers à tisser

Country Status (1)

Country Link
EP (1) EP0335998A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2311301A (en) * 1996-03-21 1997-09-24 Tis S A Electronic device for controlling sensing pins of a mechanical jacquard system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075490A2 (fr) * 1981-09-22 1983-03-30 Wilcom Pty. Limited Système de type Jacquard
FR2523602A1 (fr) * 1982-03-22 1983-09-23 Staeubli Ag Procede et dispositif pour etablir de nouveaux dessins de tissu et supports de donnees

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075490A2 (fr) * 1981-09-22 1983-03-30 Wilcom Pty. Limited Système de type Jacquard
FR2523602A1 (fr) * 1982-03-22 1983-09-23 Staeubli Ag Procede et dispositif pour etablir de nouveaux dessins de tissu et supports de donnees

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MELLIAND TEXTILBERICHTE, vol. 52, no. 7, July 1971, pages 782-788; K.-O. ALBRECHT: "Computergesteuertes Textildessinieren und Weben" *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2311301A (en) * 1996-03-21 1997-09-24 Tis S A Electronic device for controlling sensing pins of a mechanical jacquard system
GB2311301B (en) * 1996-03-21 1999-08-04 Tis S A Electronic device for controlling a mechanical jacquard system

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