EP3126074B1 - Maillage constitué d'anneaux de fil métallique et procédé de fabrication d'un maillage constitué d'anneaux de fil métallique - Google Patents

Maillage constitué d'anneaux de fil métallique et procédé de fabrication d'un maillage constitué d'anneaux de fil métallique Download PDF

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Publication number
EP3126074B1
EP3126074B1 EP15717647.0A EP15717647A EP3126074B1 EP 3126074 B1 EP3126074 B1 EP 3126074B1 EP 15717647 A EP15717647 A EP 15717647A EP 3126074 B1 EP3126074 B1 EP 3126074B1
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EP
European Patent Office
Prior art keywords
wire
strand
coils
winding
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.)
Active
Application number
EP15717647.0A
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German (de)
English (en)
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EP3126074A1 (fr
Inventor
Norma AGOSTINI
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.)
Mgtec Srl
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Mgtec Srl
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Publication date
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Publication of EP3126074A1 publication Critical patent/EP3126074A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F31/00—Making meshed-ring network from wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F15/00—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire
    • B21F15/02—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with wire
    • B21F15/04—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with wire without additional connecting elements or material, e.g. by twisting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F37/00—Manufacture of rings from wire
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F7/00—Devices affording protection against snow, sand drifts, side-wind effects, snowslides, avalanches or falling rocks; Anti-dazzle arrangements ; Sight-screens for roads, e.g. to mask accident site
    • E01F7/04—Devices affording protection against snowslides, avalanches or falling rocks, e.g. avalanche preventing structures, galleries
    • E01F7/045—Devices specially adapted for protecting against falling rocks, e.g. galleries, nets, rock traps

Definitions

  • This invention relates to a mesh made of wire rings and a method for making a mesh made of wire rings.
  • the mesh according to the invention can advantageously be used as a rockfall barrier and/or as a covering of rock faces.
  • this specification refers expressly to the above-mentioned use, the object of the invention may be susceptible to a more general use.
  • Meshes made of wire rings are widely used for covering rock slopes to protect the underlying zones from falling masses, flows of detritus and avalanche phenomena.
  • These meshes generally consist of a repeated series of wire rings linked to each other, having a diameter normally greater than or equal to 25 cm (centimetres).
  • each wire ring is made in the form of a strand with a multi-wire spheroidal cross section, and is obtained by winding and twisting on itself a steel wire along a substantially circular path.
  • the wire is closed by splicing at the relative twisting start and finish ends, that is to say, at its two ends.
  • the splicing technique even though it is excellent from the point of view of strength, can in no way be automated. In effect, this technique requires a manual processing and an extremely high precision in defining the length of the wire. In addition, if the diameter of the wire is equal to 2 mm the ends of the wire protrude from the strand with the possible injury of personnel involved in the installation of the mesh.
  • the clip constitutes an additional element which is relatively expensive and, on the other hand, the size must be selected each time as a function of the quantity of wires twisted and the required strength.
  • the aim of this invention is to provide a mesh made of wire rings and a method for making a mesh made of wire rings which overcome the above-mentioned drawbacks.
  • the aim of this invention to provide a mesh made of wire rings and a method for making a mesh made of wire rings which are simple compared with the prior art whilst guaranteeing the closing seal of the ring.
  • the aim of this invention is to provide a mesh made of wire rings and a method for making a mesh made of wire rings which can be automated.
  • the numeral 1 denotes in its entirety a mesh made of wire rings, which comprises a repeated series of rings 2 made of wire linked to each other.
  • the mesh 1 comprises a plurality of rings 2 of wire which are linked together, and, as shown more clearly in Figures 2 and 3 , each ring 2 is defined by a strand formed by a steel wire 3 repeatedly wound and twisted on itself in the form of a spiral.
  • each ring 2 preferably has a diameter greater than or equal to 25 cm.
  • the wire 3 has a first end 4, which is not twisted in the making of the strand, and a second end 5 which is, on the other hand, repeatedly twisted in the form of a spiral in the making of the strand.
  • both the ends 4 and 5 are outside the strand ( Figure 4 ) and, according to a distinctive feature of the invention, are both wound in a helical fashion around the strand with the same direction of winding ( Figures 5 and 6 ).
  • the first end 4 is, in part, passing through the middle of the rest of the strand in such a way as to protrude outwardly relative to the strand.
  • the first end 4 of the wire 3 forms a first helical locking end comprising a plurality of first coils 6 clamped on the strand
  • the second end 5 of the wire 3 forms a second helical locking end comprising a plurality of second coils 7 clamped on the strand.
  • the first coils 6 and the second coils 7 are alternated with each other.
  • This feature makes the ring 2 able to withstand high tensile stresses and, at the same time, easy to make in a mechanised manner.
  • the coils of the two windings act in conjunction, blocking each other to make a considerable contribution to the overall resistance of the ring.
  • each ring 2 of wire In order to make each ring 2 of wire, the respective wire 3 is wound and twisted repeatedly on itself to form an annular strand from which protrude the two ends 4 and 5 of the wire 3.
  • the two ends 4, 5, at the end of this first step, may be in a divergent configuration away from the strand. This would normally be due to the fact that the rigidity of the wire tends to keep the ends 4, 5 protruding from the strand in a configuration tangential to the annular line of extension of the strand.
  • This U-shaped configuration may extend in a radial or substantially radial direction relative to the centre of the annular line on which the ring extends, or it may be inclined relative to the radial direction and therefore be partly inclined or resting towards the strand ( Figures 4 and 7 ).
  • This positioning alongside each other may occur by bending only one of the two ends 4, 5 or both, in such a way that the two ends 4, 5 adopt both the desired reciprocal configuration (U-shaped) and the desired orientation relative to the strand.
  • the ends 4, 5 are wound simultaneously and in a helical fashion around the strand in the same direction of winding.
  • the step of simultaneously winding the two ends 4 and 5 of the wire 3 therefore occurs by alternating between them the first coils 6 and the second coils 7.
  • the rotational motion with which the two ends 4 and 5 are simultaneously wound is performed preferably and advantageously by a single gripping means, preferably of the gripper type, which grips and moves simultaneously the two ends 4, 5.
  • the gripping means (not illustrated) are provided with an orbiting motion about the portion of strand on which the ends 4, 5 of the wire are bent.
  • the pickup means are automatic.
  • This invention also relates to a machine 100 for winding rings 2 of wire in such a way as to make a strand as described in the above-mentioned method which is herebelow incorporated in its entirety.
  • the machine 100 is illustrated in Figures 8 and 9 and comprises a base 101 for making the strand ( Figure 9 ). More in detail, the base 101 is used to support the strand being formed. Preferably, the base 101 has a horizontal extension.
  • the machine 100 comprises an unwinding roller 102 for the wire ( Figure 9 ) rotating around the base 101 according to an annular path for making the rings 2 of wire.
  • the machine 100 comprises an element 103 for supporting the unwinding roller 102 extending from a relative central portion 104 positioned at the central (and inner) zone relative to the strand to be formed to a respective lateral portion 105 located at an outer zone relative to the strand to be formed.
  • the unwinding roller 102 is connected to the supporting element 103 in such a way that the unwinding of the wire occurs around the base 101.
  • the supporting element 103 has a "C" shape lying on a plane transversal (preferably orthogonal) to the base 101 ( Figure 8 ).
  • This shape "C” defines advantageously an opening 106 for extracting the strand formed.
  • the machine 100 comprises an automatic closing device 107 comprising means 108 for gripping the ends 4, 5 of the wire 3. More specifically, the automatic closing device 107 rotates around the portion of strand over which the ends 4, 5 of the wire 3 are bent in such a way as to wind them around the strand for making the closing.
  • the gripping means 108 comprise a toothed wheel 109 having one or more grooves 110 in which the ends 4, 5 of the wire 3 are inserted.
  • the machine 100 comprises a second toothed wheel 111 meshing with the first 109 for transmitting the motion to the first. In this way, the first toothed wheel 109 rotates around the strand to wind the ends 4, 5 of the wire around it.
  • each ring 2 is made with the same wire 3 which forms the ring 2 and by a single rotational winding movement, which, advantageously, may be mechanised and automated in a simple and inexpensive way.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Wire Processing (AREA)
  • Ropes Or Cables (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Claims (11)

  1. Maillage constitué d'anneaux de fil métallique, comprenant une pluralité d'anneaux de fils métallique (2) étant liés ensemble et où chaque anneau (2) comprend un toron formé par un fil métallique (3) enroulé sur lui-même de façon répétitive en spirale; ledit fil métallique (3) comprenant une première extrémité (4) et une seconde extrémité (5) situées toutes deux à l'extérieur du toron; le maillage (1) étant caractérisé en ce que chaque anneau (2) comporte les deux extrémités (4, 5) du fil métallique (3) enroulées de façon hélicoïdale autour du toron avec la même direction d'enroulement pour fermer le toron.
  2. Maillage selon la revendication 1, caractérisé en ce que la première extrémité (4) du fil métallique (3) forme une première portion finale de verrouillage hélicoïdale comprenant une pluralité de premières spires (6) serrées sur le toron, et la seconde extrémité (5) du fil métallique (3) forme une seconde portion finale de verrouillage hélicoïdale comprenant une pluralité de secondes spires (7) serrées sur le toron; lesdites premières spires (6) et lesdites secondes spires (7) étant insérées les unes entre les autres.
  3. Maillage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'une des première et seconde extrémités (4; 5) du fil métallique (3) est repliée sur la partie en amont des spires (6; 7) respectives étant serrées sur le toron.
  4. Maillage selon l'une quelconque des revendications précédentes, caractérisé en ce que les première et seconde extrémités (4; 5) du fil métallique (3) forment un dispositif de verrouillage hélicoïdal.
  5. Maillage selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdites première et seconde extrémités (4; 5) du fil métallique (3) sont enroulées autour du toron avec un pas d'enroulement étant inférieur au pas d'enroulement du fil métallique (3) sur lui-même pour former le reste du toron.
  6. Procédé de fabrication d'un maillage constitué d'anneaux de fil métallique, où chaque anneau (2) est réalisé par l'enroulement et le torsadage répétitif d'un fil métallique (3) sur lui-même pour former un toron annulaire à partir duquel dépassent les deux extrémités (4, 5) du fil métallique (3), caractérisé en ce que les deux extrémités (4, 5) du fil métallique (3) sont rapprochées l'une de l'autre et sont simultanément enroulées de façon hélicoïdale autour du toron avec la même direction d'enroulement pour fermer le toron.
  7. Procédé selon la revendication 6, caractérisé en ce que la première extrémité (4) du fil métallique (3) est enroulée autour du toron pour former une première portion finale de verrouillage hélicoïdale comprenant une pluralité de premières spires (6) serrées sur le toron, et la seconde extrémité (5) du fil métallique (3) est enroulée autour du toron pour former une seconde portion finale de verrouillage hélicoïdale comprenant une pluralité de secondes spires (7) serrées sur le toron; lesdites extrémités (4, 5) du fil métallique (3) étant simultanément enroulées pendant qu'elles sont maintenues côte à côte de manière à ce que lesdites premières spires (6) et lesdites secondes spires (7) soient insérées les unes entre les autres.
  8. Procédé selon la revendication 7, caractérisé en ce que l'étape consistant à enrouler simultanément les deux extrémités (4, 5) du fil métallique (3) est précédée par le pliage d'au moins une des deux extrémités (4; 5) du fil métallique (3) pour mettre ladite extrémité (4, 5) en position le long de l'autre extrémité (4, 5) de manière à ce que les deux extrémités (4, 5) forment une configuration substantiellement en « U ».
  9. Procédé selon l'une quelconque des revendications de 6 à 8, caractérisé en ce que lesdites extrémités (4, 5) du fil métallique sont enroulées de façon hélicoïdale par un unique préhenseur conçu pour simultanément saisir les deux extrémités (4, 5) et pour effectuer un mouvement elliptique autour d'une ligne d'extension dudit toron.
  10. Procédé selon la revendication 9, caractérisé en ce que l'étape consistant à enrouler simultanément les deux extrémités (4, 5) est effectuée automatiquement par une machine (100) comprenant ledit préhenseur.
  11. Machine (100) servant à enrouler un fil métallique (3) sur lui-même pour former un toron; ladite machine (100) comprenant:
    - une base (101) pour réaliser le toron;
    - un rouleau de déroulement (102) pour le fil métallique (3) tournant autour de la base (101) selon une trajectoire annulaire pour fabriquer les anneaux (2) de fil métallique (3);
    caractérisée en ce qu'elle comprend un dispositif de fermeture automatique (107) comprenant des moyens de préhension (108) pour saisir les extrémités (4, 5) du fil métallique (3); ledit dispositif de fermeture automatique (107) tournant autour de la portion de toron sur laquelle les extrémités (4, 5) du fil métallique (3) sont pliées selon la même direction d'enroulement.
EP15717647.0A 2014-03-31 2015-03-26 Maillage constitué d'anneaux de fil métallique et procédé de fabrication d'un maillage constitué d'anneaux de fil métallique Active EP3126074B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVR20140079 2014-03-31
PCT/IB2015/052230 WO2015150987A1 (fr) 2014-03-31 2015-03-26 Maillage constitué d'anneaux de fil métallique et procédé de fabrication d'un maillage constitué d'anneaux de fil métallique

Publications (2)

Publication Number Publication Date
EP3126074A1 EP3126074A1 (fr) 2017-02-08
EP3126074B1 true EP3126074B1 (fr) 2017-07-19

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EP15717647.0A Active EP3126074B1 (fr) 2014-03-31 2015-03-26 Maillage constitué d'anneaux de fil métallique et procédé de fabrication d'un maillage constitué d'anneaux de fil métallique

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EP (1) EP3126074B1 (fr)
AR (1) AR099889A1 (fr)
ES (1) ES2644019T3 (fr)
WO (1) WO2015150987A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3083477B1 (fr) * 2018-05-14 2020-06-19 Compagnie Generale Des Etablissements Michelin Procede de fabrication d'une tringle tressee pour bandage pneumatique, avec pliage d'un troncon excedentaire du fil de tresse
JP2019214862A (ja) * 2018-06-12 2019-12-19 前田工繊株式会社 複合繊維部材の製造方法、方形部材、及び箱状部材

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Publication number Priority date Publication date Assignee Title
ITMI20031601A1 (it) * 2003-08-04 2005-02-05 Italgeo S R L Rete ad anelli di filo, particolarmente per barriere paramassi e rivestimenti di parete rocciose, nonche' procedimento per la realizzazione della rete.

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Publication number Publication date
EP3126074A1 (fr) 2017-02-08
ES2644019T3 (es) 2017-11-27
WO2015150987A1 (fr) 2015-10-08
AR099889A1 (es) 2016-08-24

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