EP1501971B1 - Structure de filet formee par tricotage de cables metalliques - Google Patents

Structure de filet formee par tricotage de cables metalliques Download PDF

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Publication number
EP1501971B1
EP1501971B1 EP03740689A EP03740689A EP1501971B1 EP 1501971 B1 EP1501971 B1 EP 1501971B1 EP 03740689 A EP03740689 A EP 03740689A EP 03740689 A EP03740689 A EP 03740689A EP 1501971 B1 EP1501971 B1 EP 1501971B1
Authority
EP
European Patent Office
Prior art keywords
meshes
cable
row
adjacent
mesh
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 - Lifetime
Application number
EP03740689A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1501971A1 (fr
Inventor
Philippe Robit
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.)
GEOTECHNIQUE ET TRAVAUX SPECIAUX - GTS
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Geotechnique et Travaux Speciaux - GTS
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
    • Y10T442/102—Woven scrim
    • Y10T442/109—Metal or metal-coated fiber-containing scrim

Definitions

  • the present invention relates to a net structure formed by knitting wire ropes, a protective net against the fall of one or more heavy bodies, such as blocks of stone, formed from said structure, and a protective device against the falls of such heavy bodies.
  • the present invention aims to overcome the aforementioned drawbacks, by providing a mesh structure formed by knitting wire ropes, having a high power dissipation energy transmitted by the fall of a body while remaining relatively inexpensive to manufacture.
  • each mesh that comprises this net structure is connected to the laterally adjacent mesh by a rupturable junction piece, this junction piece having a breaking threshold much lower than that of the cables constituting the structure of the net.
  • the breaking point of the joining piece can in particular be of the order of a quarter of the breaking threshold of these cables.
  • the connecting pieces make it possible to keep the meshes normally in a position close to each other, so that, for a given number of meshes, the surface of the net according to the invention is smaller than the surface of a net of the same knitting structure, for the same number of stitches without joining pieces.
  • the connecting pieces break successively, from the point of impact and radiating from it, releasing the assembly of meshes. These successive ruptures allow to absorb a portion of the energy transmitted by the body and also allow to release a possibility of additional deformation of the net. This additional deformation generates, when it occurs, friction and twisting of the cables, which contribute to the absorption of the energy transmitted by the fall of the body.
  • the rupture of the connecting pieces is interrupted when the energy transmitted by the fall of the body becomes insufficient to cause these breaks.
  • the net structure according to the invention allows an absorption of greater energy without breaking the cables, so without breaking the integrity of the cables. the structure of the net.
  • the knitting of the cables is of the "Jersey" type.
  • the connecting pieces may comprise open metal sleeves crimped on the cables or parts of the kind of supplementary links for the chain.
  • each cable or portion of cable constituting a row of meshes forms successive "S" defining circular inverted loops, and the joining pieces collect the adjacent cable strands of the adjacent meshes.
  • each cable or portion of cable constituting the row of cells immediately adjacent to the aforementioned one has a structure identical to that of this first row of stitches, and the portion of cable forming a stitch of this second row of stitches fits into a corresponding stitch of said first row of stitches, passes behind the strands of the two adjacent stitches of this first row of stitches and comes out of the adjacent stitch.
  • each cable or portion of cable constituting a row of meshes forms successive piriform loops, in "tiny e", and the connecting pieces collect the adjacent cable strands of the adjacent meshes; each cable or portion of cable constituting the row of cells immediately adjacent to the aforementioned one has a structure identical to that of this first row of stitches, the cable portion forming a stitch of this second row of stitches falling into a corresponding stitch of said first row of stitches row of stitches, passing behind the two strands of the two adjacent stitches of this first row of stitches and emerging from the adjacent stitch.
  • the net according to the invention is formed from the structure described above.
  • the mesh length can be oriented parallel or perpendicular to the length of the net.
  • the protection device according to the invention comprises a net as defined above.
  • the figure 1 represents a portion of cable 1 forming successive "S" which define inverted loops 2 of circular shape.
  • the adjacent cable strands 2a of two adjacent loops 2 are joined by connecting pieces 3 formed by metal sleeves crimped onto these strands 2a.
  • the joining pieces 3 are ruptible and have a breaking threshold much lower than that of the cable 1, in particular of the order of a quarter of the breaking threshold of this cable 1.
  • the diameter of the circular part that forms each loop 2 is 350 mm
  • the diameter of the cable 1 used is 12 mm
  • the elasticity of this cable 1 is at most 1.15% before breaking
  • the breaking point of the cable 1 is 84 kN
  • the threshold breaking of the connecting pieces 3 is of the order of 20 kN.
  • the figure 2 represents a net structure 5 including a series of six portions of cables 1a to 1f of the same conformation as that shown on FIG. figure 1 , knitted to each other, each loop 2 forming a mesh of this knit.
  • each mesh of a portion of cable considered enters a corresponding mesh of the portion of cable immediately adjacent, passes behind the strands 2a of the two adjacent meshes of this cable portion and out of the adjacent mesh.
  • the figure 3 represents a similar structure 5, in which the knitting of the portion 1b to the portion 1a, of the portion 1d to the portion 1c and the portion 1f to the portion 1e differs however: each mesh of a portion 1b , 1d or 1f fate of a corresponding mesh of the portion 1a, 1c or 1e respectively, passes in front of the strands 2a of the two adjacent cells of this cable portion 1a, 1c or 1e and enters the adjacent mesh.
  • portion 1b to portion 1c and portion 1d to portion 1e is identical to that described above.
  • the figure 4 represents a portion of cable 10 forming successive piriform loops 12, in "tiny e".
  • the adjacent cable strands 12a of two adjacent loops 12 are joined by joining pieces 3 identical to those described above.
  • the figure 5 represents a net structure 50 including a series of six cable portions 10a to 10f of the same conformation as that shown on FIG. figure 4 , knitted to each other, each loop 12 forming a mesh of this knit.
  • each mesh of a portion of cable considered enters a corresponding mesh of the cable portion immediately adjacent, passes behind the strands 12a of the two adjacent cells of this cable portion and out of the adjacent mesh.
  • the Figures 6 and 7 show rectangular nets 100, 101 formed from the structure 5.
  • the length of the stitches 2 is oriented parallel to the length of the net, whereas, in the case of the net 101 represented on the figure 7 , the mesh length 2 is oriented perpendicular to the length of the net.
  • the invention provides a decisive improvement to the prior art by providing a net structure 5, 50 having a high power dissipation of the energy transmitted by the fall of a body.
  • the connecting pieces make it possible to maintain the meshes normally in a position close to each other, so that, for a given number of meshes, the surface of the net according to the invention is smaller than the surface of a mesh. net of the same knitting structure, for the same number of stitches.
  • junction pieces 3 break successively from the point of impact and radiating from this one, releasing the assembly of the meshes. These successive ruptures allow to absorb a portion of the energy transmitted by the body and also allow to release a possibility of additional deformation of the net. This additional deformation generates, when it occurs, friction between the cables, which contribute to the absorption of the energy transmitted by the fall of the body.
  • the rupture of the connecting pieces 3 is interrupted when the energy transmitted by the fall of the body becomes insufficient to cause these breaks.
  • the net structure according to the invention allows absorption of the energy transmitted by said body without breaking the cables, so without breaking the integrity of the net structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Wire Processing (AREA)
  • Knitting Of Fabric (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Laminated Bodies (AREA)
  • Ropes Or Cables (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
EP03740689A 2002-05-06 2003-04-30 Structure de filet formee par tricotage de cables metalliques Expired - Lifetime EP1501971B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0205651 2002-05-06
FR0205651A FR2839322B1 (fr) 2002-05-06 2002-05-06 Structure de filet formee par tricotage de cables metalliques
PCT/FR2003/001366 WO2003093553A1 (fr) 2002-05-06 2003-04-30 Structure de filet formée par tricotage de câbles métalliques

Publications (2)

Publication Number Publication Date
EP1501971A1 EP1501971A1 (fr) 2005-02-02
EP1501971B1 true EP1501971B1 (fr) 2008-02-27

Family

ID=29226223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03740689A Expired - Lifetime EP1501971B1 (fr) 2002-05-06 2003-04-30 Structure de filet formee par tricotage de cables metalliques

Country Status (10)

Country Link
US (1) US20050148251A1 (no)
EP (1) EP1501971B1 (no)
AT (1) ATE387529T1 (no)
AU (1) AU2003265532A1 (no)
CA (1) CA2483962C (no)
DE (1) DE60319359D1 (no)
ES (1) ES2300596T3 (no)
FR (1) FR2839322B1 (no)
NO (1) NO323399B1 (no)
WO (1) WO2003093553A1 (no)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO339295B1 (no) * 2010-10-12 2016-11-21 Nat Oilwell Varco Norway As Fangkurvsystem for en underdekks rørhåndteringsmaskin
JP6260844B1 (ja) * 2017-04-30 2018-01-17 株式会社古屋興産 荷降ろしロープ掴み用の補助マット
JP6379420B1 (ja) * 2018-01-10 2018-08-29 株式会社古屋興産 ロープ掴み用の手嵌め具
CN112453288A (zh) * 2020-11-02 2021-03-09 刘永进 树根铁丝网制作工艺及其使用方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1074198B (de) * 1960-01-28 Augsburg Hans Meisen Netz
DE505005C (de) * 1929-09-15 1930-08-12 Hans J Wieck Handstanze zum Ausbessern von Netzen
GB722007A (en) * 1951-01-18 1955-01-19 Rudolf Theodoor Schorr New or improved sling net
FR2684696B1 (fr) * 1991-12-10 1994-03-04 Protecma Procede pour la realisation d'un article tricote a base de fils metalliques et nouveau type de tricot ainsi realise.
US6284201B1 (en) * 1993-02-10 2001-09-04 Alfred Buck Apparatus for the catalytic purification of flowing gases, in particular exhaust gases of internal combustion engines
DE4328746C2 (de) * 1993-08-26 1995-08-24 Baumeister & Ostler Gmbh Co Sicherheitsnetzanordnung
CH690368A5 (de) * 1996-05-24 2000-08-15 Oichtner Franz Drahtseilnetz für Steinschlag-, Holzschlag- und Lawinenverbauungen und Verfahren zur Herstellung desselben.
JP3482489B2 (ja) * 1998-10-14 2003-12-22 旭土建株式会社 立体構造状ネットと、このネットを用いた複合構造材
DE19934240A1 (de) * 1999-07-21 2001-02-15 Stahl Carl Gmbh Seilverbinder und seine Verwendung
WO2001043952A1 (en) * 1999-12-15 2001-06-21 N.V. Bekaert S.A. A reinforcing structure for stiff composite articles
CH695104A5 (de) * 2000-11-13 2005-12-15 Fatzer Ag Auffangnetz insbesondere für Steinschlagverbauungen

Also Published As

Publication number Publication date
EP1501971A1 (fr) 2005-02-02
FR2839322A1 (fr) 2003-11-07
CA2483962A1 (fr) 2003-11-13
NO20040038L (no) 2004-01-06
DE60319359D1 (de) 2008-04-10
ES2300596T3 (es) 2008-06-16
CA2483962C (fr) 2010-03-30
AU2003265532A1 (en) 2003-11-17
NO323399B1 (no) 2007-04-23
FR2839322B1 (fr) 2004-06-11
US20050148251A1 (en) 2005-07-07
ATE387529T1 (de) 2008-03-15
WO2003093553A1 (fr) 2003-11-13

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