EP0533636A1 - Ressort de rappel composite pour les lisses de métiers jacquard, verdol ou similaires - Google Patents

Ressort de rappel composite pour les lisses de métiers jacquard, verdol ou similaires Download PDF

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Publication number
EP0533636A1
EP0533636A1 EP19920830489 EP92830489A EP0533636A1 EP 0533636 A1 EP0533636 A1 EP 0533636A1 EP 19920830489 EP19920830489 EP 19920830489 EP 92830489 A EP92830489 A EP 92830489A EP 0533636 A1 EP0533636 A1 EP 0533636A1
Authority
EP
European Patent Office
Prior art keywords
spring
wire
heddles
springs
shorter
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.)
Granted
Application number
EP19920830489
Other languages
German (de)
English (en)
Other versions
EP0533636B1 (fr
Inventor
Giovanni Cirillo
Girolamo Lattanti
Giustino Mosca
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.)
MOLLIFICIO CONTE Srl
Original Assignee
MOLLIFICIO CONTE Srl
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 MOLLIFICIO CONTE Srl filed Critical MOLLIFICIO CONTE Srl
Publication of EP0533636A1 publication Critical patent/EP0533636A1/fr
Application granted granted Critical
Publication of EP0533636B1 publication Critical patent/EP0533636B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D03C3/24—Features common to jacquards of different types
    • D03C3/40—Constructions of lifting-cords
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/24—Features common to jacquards of different types
    • D03C3/44—Lingoes

Definitions

  • the present invention relates to the return springs for heddles being employed in the harnesses of the textile machines of Jacquard type, Verdol type and the like; particularly, it relates to a composite spring having a higher tensile strength.
  • the object of the present invention is to provide a return spring for heddles, which is characterized by a higher tensile strength in the above described area.
  • a spring characterized in that it consists of two helical springs made of steel wire which are connected in series to each other and have different lengths and cross sections, the wire of the shorter spring having a cross section 5 to 50%, and preferably 18 to 27%, larger than the wire of the longer spring.
  • the composite spring according to the present invention has the advantage of a tensile strength which is at least double compared to that of the presently used conventional springs.
  • the composite spring according to the present invention has the further advantage of reducing resonances, as it substantially varies the ratio between the spring natural frequency and the loom operating frequency. In fact, it is known that, by varying such ratio, the resonance is reduced and therefore also the crosswise stresses cooperating in a decisive way to the damaging of the operating springs are reduced.
  • the composite spring according to the present invention essentially consists of two helical springs 1 and 2 connected in series to each other.
  • the spring 1 is made of a steel wire having a 0,25 mm cross section
  • spring 2 is made of a steel wire having a 0,20 mm cross section, i.e. approximately 20% smaller than the wire section of spring 1.
  • the length of spring 2 is chosen as a function of the heddle to which it must be applied, generally said length being approximately 2/3 of the spring whole length.
  • the length of spring 1 is instead shorter, and in the embodiment herein shown it is 10 cm. Such length depends not only upon the amplitude of the crucial zone in which the failures of the known springs mainly occur, but also upon the final elastic resultant of the composite spring.
  • the spring 1 has, at its external end, an eyelet for joining to the anchoring point.
  • the spring 1 has, at its opposite end, a contracted portion 3 for joining spring 2.
  • the spring 2 has a corresponding bell-shaped extended portion 4 cooperating with the contacted portion 3 for joining the two springs.
  • spring 2 can be telescopically inserted within the spring 1 and the junction is ensured by fitting the contraction 3 of spring 1 in the extension 4 of spring 2.
  • the material by which the two springs are formed is accurately selected as regards the wire cross section, the diameter of the coils, the pre-impressed loading, the kind of steel of the wire and so forth, in order to cause the elastic resultant of the two coupled springs to be equal, in terms of loads, to what is required by the specific employments on the heddles.
  • component 1 of the composite spring according to the present invention can bear without any damage the stresses causing the failure of the known springs.
  • both components 1 and 2 are stressed by the same tensional load, their elastic response materializes through different extensions, thereby causing a mutual damping of the swingings, which involves a drastic reduction or also the elimination of the crosswise stresses.
  • spring 1 and spring 2 are connected to each other by means of a metal joint 6 having both a projection 7 suitable to engage within the end of spring 1 and, on the opposite side, a projection 8 suitable to engage within the end of spring 2.
  • said joint can be also provided in a different suitable material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Springs (AREA)
  • Looms (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
EP92830489A 1991-09-16 1992-09-15 Ressort de rappel composite pour les lisses de métiers jacquard, verdol ou similaires Expired - Lifetime EP0533636B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI912440 1991-09-16
ITMI912440A IT1251322B (it) 1991-09-16 1991-09-16 Molla composita di richiamo per licci di telai tipo jacquard, verdol e simili

Publications (2)

Publication Number Publication Date
EP0533636A1 true EP0533636A1 (fr) 1993-03-24
EP0533636B1 EP0533636B1 (fr) 1994-12-28

Family

ID=11360670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92830489A Expired - Lifetime EP0533636B1 (fr) 1991-09-16 1992-09-15 Ressort de rappel composite pour les lisses de métiers jacquard, verdol ou similaires

Country Status (4)

Country Link
EP (1) EP0533636B1 (fr)
DE (1) DE69201039T2 (fr)
ES (1) ES2066593T3 (fr)
IT (1) IT1251322B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2718810A1 (fr) * 1994-04-19 1995-10-20 Staubli Verdol Dispositif d'assemblage de l'extrémité d'un ressort hélicoïdal par rapport à un autre organe.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004044783A1 (de) * 2004-09-16 2006-03-30 Deutsche Institute für Textil- und Faserforschung (DITF) Stuttgart Fachbildeeinrichtung mit verformter Feder

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1794911A (en) * 1929-06-20 1931-03-03 H F Livermore Co Dobby spring for loom harness mechanisms
DE2651057A1 (de) * 1976-11-09 1978-05-11 Schnitzler & Vogel Weblitze
FR2529587A1 (fr) * 1982-07-05 1984-01-06 Marsande Tissages P Dispositif d'attache pour les harnais des metiers a tisser du type jacquard notamment
EP0292632A2 (fr) * 1987-05-29 1988-11-30 CREAZIONI TESSILI BORSA DI CESARINO BORSA & C. S.a.s. Dispositif de tension élastique pour machine jacquard

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1794911A (en) * 1929-06-20 1931-03-03 H F Livermore Co Dobby spring for loom harness mechanisms
DE2651057A1 (de) * 1976-11-09 1978-05-11 Schnitzler & Vogel Weblitze
FR2529587A1 (fr) * 1982-07-05 1984-01-06 Marsande Tissages P Dispositif d'attache pour les harnais des metiers a tisser du type jacquard notamment
EP0292632A2 (fr) * 1987-05-29 1988-11-30 CREAZIONI TESSILI BORSA DI CESARINO BORSA & C. S.a.s. Dispositif de tension élastique pour machine jacquard

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2718810A1 (fr) * 1994-04-19 1995-10-20 Staubli Verdol Dispositif d'assemblage de l'extrémité d'un ressort hélicoïdal par rapport à un autre organe.
EP0678603A1 (fr) * 1994-04-19 1995-10-25 Staubli-Verdol S.A. Dispositif d'assemblage de l'extrémité d'un ressort hélicoidal par rapport à un autre organe
US5819809A (en) * 1994-04-19 1998-10-13 Staubli Lyon Connectors for inhibiting resonance of coil springs

Also Published As

Publication number Publication date
IT1251322B (it) 1995-05-08
DE69201039T2 (de) 1995-05-18
DE69201039D1 (de) 1995-02-09
ITMI912440A0 (it) 1991-09-16
EP0533636B1 (fr) 1994-12-28
ES2066593T3 (es) 1995-03-01
ITMI912440A1 (it) 1993-03-17

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