US20050148251A1 - Net structure formed by the knitting metal wires - Google Patents

Net structure formed by the knitting metal wires Download PDF

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Publication number
US20050148251A1
US20050148251A1 US10/513,513 US51351304A US2005148251A1 US 20050148251 A1 US20050148251 A1 US 20050148251A1 US 51351304 A US51351304 A US 51351304A US 2005148251 A1 US2005148251 A1 US 2005148251A1
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US
United States
Prior art keywords
meshes
adjacent
row
mesh
net
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.)
Abandoned
Application number
US10/513,513
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English (en)
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
GEOTECHNIQUE ET TRAVAUX SPECIAUX GTS
Original Assignee
GEOTECHNIQUE ET TRAVAUX SPECIAUX GTS
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 GEOTECHNIQUE ET TRAVAUX SPECIAUX GTS filed Critical GEOTECHNIQUE ET TRAVAUX SPECIAUX GTS
Assigned to GEOTECHNIQUE ET TRAVAUX SPECIAUX - G.T.S. reassignment GEOTECHNIQUE ET TRAVAUX SPECIAUX - G.T.S. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ROBIT, PHILIPPE
Publication of US20050148251A1 publication Critical patent/US20050148251A1/en
Abandoned legal-status Critical Current

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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 the knitting of metal ropes, a net for protection against the fall of one or more heavy bodies, such as stone blocks, which is formed from said structure, and a device for protection against the falls of such heavy bodies.
  • the present invention is aimed at overcoming the abovementioned disadvantages by providing a net structure formed by the knitting of metal ropes, which has a high capacity for dissipating the energy transmitted by the fall of a body, while at the same time remaining relatively cost-effective to manufacture.
  • each mesh which this net structure comprises is connected to the laterally adjacent mesh by means of a breakable junction piece, this junction piece having a breaking threshold markedly lower than that of the ropes forming the structure of the net.
  • the breaking threshold of the junction piece may, in particular, be of the order of a quarter of the breaking threshold of these ropes.
  • junction pieces make it possible to keep the meshes normally in a position close to one another, so that, for a given number of meshes, the area of the net according to the invention is smaller than the area of a net having the same knitting structure, for the same number of meshes without junction pieces.
  • the junction pieces break in succession, starting from the point of impact and radiating from the latter, thus freeing the assembly of meshes.
  • These successive breaks make it possible to absorb part of the energy transmitted by the body and also make it possible to trigger the possibility of an additional deformation of the net.
  • This additional deformation when it occurs, generates frictions and torsions of the ropes, thus contributing to the absorption of the energy transmitted by the fall of the body.
  • the breaking of the junction 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 makes it possible to absorb more energy, without a breaking of the ropes, hence without a break in the intactness of the structure of the net.
  • the knitting of the ropes is of the Jersey type.
  • junction pieces may comprise open metal sleeves crimped on the ropes or pieces of the type consisting of make-up links for a chain.
  • each rope or rope portion constituting a row of meshes forms successive “S”s defining inverted loops of circular shape, and the junction pieces gather together the strands of adjacent ropes of the adjacent meshes; each rope or rope portion constituting the row of meshes which is directly adjacent to that mentioned above has a structure identical to that of this first row of meshes, and the rope portion forming a mesh of this second row of meshes reenters a corresponding mesh of said first row of meshes, passes behind the strands of the two adjacent meshes of this first row of meshes and reemerges from the adjacent mesh.
  • each rope or rope portion constituting a row of meshes forms successive pear-shaped loops in the form of an e, and the junction pieces gather together the strands of adjacent ropes of the adjacent meshes; each rope or rope portion constituting the row of meshes which is directly adjacent to that mentioned above has a structure identical to that of this first row of meshes, the rope portion which forms a mesh of this second row of meshes reentering a corresponding mesh of said first row of meshes, passing behind the two strands of the two adjacent meshes of this first row of meshes and reemerging from the adjacent mesh.
  • the net according to the invention is formed from the structure described above.
  • the length of the meshes may be oriented parallel or perpendicularly to the length of the net.
  • the protective device according to the invention comprises a net, as defined above.
  • FIG. 1 is a plan view of a rope portion which it comprises, according to a first embodiment, constituting a series of successive loops intended to form meshes;
  • FIG. 2 is a plan view of the net structure, including a series of rope portions of the same configuration as that shown in FIG. 1 and knitted to one another;
  • FIG. 3 is a plan view of a similar structure, with an alternative embodiment in terms of the knitting;
  • FIG. 4 is a plan view of a rope portion which the net structure comprises, according to a second embodiment, constituting a series of successive loops intended for forming meshes;
  • FIG. 5 is a plan view of the net structure, including a series of rope portions of the same configuration as that shown in FIG. 4 and knitted to one another;
  • FIG. 6 is a plan view of a net formed from the structure shown in FIG. 2 .
  • FIG. 7 is a plan view of another net formed from the structure shown in FIG. 2 .
  • FIG. 1 illustrates a rope portion 1 forming successive “S”s which define inverted loops 2 of circular shape.
  • the strands of adjacent ropes 2 a of two adjacent loops 2 are gathered together by means of junction pieces 3 formed by metal sleeves crimped on these strands 2 a.
  • junction pieces 3 are breakable and have a breaking threshold markedly lower than that of the rope 1 , in particular of the order of a quarter of the breaking threshold of this rope 1 .
  • the diameter of the circular part which each loop 2 forms is 350 mm
  • the diameter of the rope 1 used is 12 mm
  • the elasticity of this rope 1 is at most 1.15% before break
  • the breaking threshold of the rope 1 is 84 kN
  • the breaking threshold of the junction pieces 3 is of the order of 20 kN.
  • FIG. 2 illustrates a net structure 5 including a series of six rope portions 1 a to 1 f of the same configuration as that shown in FIG. 1 and knitted to one another, each loop 2 forming a mesh of this knit.
  • each mesh of a rope portion in question reenters a corresponding mesh of the directly adjacent rope portion, passes behind the strands 2 a of the two adjacent meshes of this rope portion and reemerges from the adjacent mesh.
  • FIG. 3 illustrates a similar structure 5 , in which, however, the knitting of the portion 1 b to the portion 1 a , of the portion 1 d to the portion 1 c and of the portion 1 f to the portion 1 e differs: each mesh of a portion 1 b , 1 d or 1 f emerges from a corresponding mesh of the portion 1 a , 1 c or 1 e respectively, passes in front of the strands 2 a of the two adjacent meshes of this rope portion 1 a , 1 c or 1 e and reenters the adjacent mesh.
  • FIG. 4 illustrates a rope portion 10 forming successive pear-shaped loops 12 in the form of an e.
  • the strands of adjacent ropes 12 a of two adjacent loops 12 are gathered together by means of junction pieces 3 identical to those described above.
  • FIG. 5 illustrates a net structure 50 including a series of six rope portions 10 a to 10 f of the same configuration as that shown in FIG. 4 and knitted to one another, each loop 12 forming a mesh of this knit.
  • each mesh of a rope portion in question reenters a corresponding mesh of the directly adjacent rope portion, passes behind the strands 12 a of the two adjacent meshes of this rope portion and reemerges from the adjacent mesh.
  • FIGS. 6 and 7 show rectangular nets 100 , 101 formed from the structure 5 .
  • the length of the meshes 2 is oriented parallel to the length of the net, whereas, as regards the net 101 illustrated in FIG. 7 , the length of the meshes 2 is oriented perpendicularly to the length of the net.
  • the invention affords a decisive improvement to the prior art by providing a net structure 5 , 50 having a high capacity for dissipating the energy transmitted by the fall of a body.
  • junction pieces make it possible to keep the meshes normally in a position close to one another, so that, for a given number of meshes, the area of the net according to the invention is smaller than the area of a net having the same knitting structure, for the same number of meshes.
  • junction pieces 3 break in succession, starting from the point of impact and radiating from the latter, thus freeing the assembly of meshes. These successive breaks make it possible to absorb part of the energy transmitted by the body and also make it possible to trigger the possibility of an additional deformation of the net. This additional deformation, when it occurs, generates frictions between the ropes which contribute to absorbing the energy transmitted by the fall of the body.
  • the breaking of the junction 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 makes it possible to absorb the energy transmitted by said body, without a break of the ropes, hence without a break in the intactness of the structure of the net.

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)
US10/513,513 2002-05-06 2003-04-30 Net structure formed by the knitting metal wires Abandoned US20050148251A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR02/05651 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 (1)

Publication Number Publication Date
US20050148251A1 true US20050148251A1 (en) 2005-07-07

Family

ID=29226223

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/513,513 Abandoned US20050148251A1 (en) 2002-05-06 2003-04-30 Net structure formed by the knitting metal wires

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)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130206388A1 (en) * 2010-10-12 2013-08-15 National Oilwell Varco Norway As Capture basket system for an underdeck pipehandling machine
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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5996972A (en) * 1996-05-24 1999-12-07 Kaiser; Hermann Wire rope net for protection fences against falling rocks, avalanches and felling
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
US6592103B2 (en) * 2000-11-13 2003-07-15 Fatzer Ag Catchment net for rockfall catchment systems or the like
US6630414B1 (en) * 1998-10-14 2003-10-07 Asahi Doken Kabushiki Kaisha Three-dimensional net, and composite structural material using the same

Family Cites Families (7)

* 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.
DE4328746C2 (de) * 1993-08-26 1995-08-24 Baumeister & Ostler Gmbh Co Sicherheitsnetzanordnung
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5996972A (en) * 1996-05-24 1999-12-07 Kaiser; Hermann Wire rope net for protection fences against falling rocks, avalanches and felling
US6630414B1 (en) * 1998-10-14 2003-10-07 Asahi Doken Kabushiki Kaisha Three-dimensional net, and composite structural material using the same
US6592103B2 (en) * 2000-11-13 2003-07-15 Fatzer Ag Catchment net for rockfall catchment systems or the like

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130206388A1 (en) * 2010-10-12 2013-08-15 National Oilwell Varco Norway As Capture basket system for an underdeck pipehandling machine
US9145759B2 (en) * 2010-10-12 2015-09-29 National Oilwell Varco Norway As Capture basket system for an underdeck pipehandling machine
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

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
EP1501971B1 (fr) 2008-02-27
AU2003265532A1 (en) 2003-11-17
NO323399B1 (no) 2007-04-23
FR2839322B1 (fr) 2004-06-11
ATE387529T1 (de) 2008-03-15
WO2003093553A1 (fr) 2003-11-13

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Legal Events

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AS Assignment

Owner name: GEOTECHNIQUE ET TRAVAUX SPECIAUX - G.T.S., FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ROBIT, PHILIPPE;REEL/FRAME:016372/0367

Effective date: 20040929

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION