EP3483361B1 - Screen and security fence comprising such a screen - Google Patents

Screen and security fence comprising such a screen Download PDF

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Publication number
EP3483361B1
EP3483361B1 EP18204359.6A EP18204359A EP3483361B1 EP 3483361 B1 EP3483361 B1 EP 3483361B1 EP 18204359 A EP18204359 A EP 18204359A EP 3483361 B1 EP3483361 B1 EP 3483361B1
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EP
European Patent Office
Prior art keywords
steel wires
mesh
netting
horizontal steel
height
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EP18204359.6A
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German (de)
French (fr)
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EP3483361A1 (en
Inventor
Eric BANDELIER
Mme Muriel FOURNIER
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SNCF Reseau
ArcelorMittal Bissen and Bettembourg SA
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SNCF Reseau
ArcelorMittal Bissen and Bettembourg SA
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Publication of EP3483361A1 publication Critical patent/EP3483361A1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H17/00—Fencing, e.g. fences, enclosures, corrals
    • E04H17/02—Wire fencing, e.g. made of wire mesh
    • E04H17/04—Wire fencing, e.g. made of wire mesh characterised by the use of specially adapted wire, e.g. barbed wire, wire mesh, toothed strip or the like; Coupling means therefor
    • E04H17/05—Wire mesh or wire fabric

Definitions

  • a security fence is generally mounted on the periphery of dangerous areas, for example a railway track, in order to prevent people or animals from inadvertently circulating in the dangerous zone.
  • a security fence is common equipment and is used by professionals as well as individuals.
  • Such rigid panels have many drawbacks.
  • the unit cost of a panel is high since it has a large number of large diameter steel wires.
  • the weight of such a rigid panel is also important, which makes it difficult to handle and requires the use of sealed posts.
  • the use of concrete to seal the posts is not desired since this negatively impacts the environment and increases the installation time and therefore its cost.
  • a rigid panel also has the drawback of being able to be easily stolen by cutting it in line with a post, which increases the overall cost of such a fence outdoors over long distances, in particular, for a railway application.
  • an immediate solution would be to use a traditional netting made of flexible steel wires packaged in a roll and the diameter of which is between 2 and 3.5 mm.
  • the advantage of such a mesh is that it can be fixed to the ground by means of posts which can be planted directly into the ground, that is to say, without resorting to sealing with concrete, which allows a pose following the profile of the land.
  • the horizontal steel wires and the vertical steel wires have a diameter of 3.8 mm. Such a diameter offers the best compromise between mass and flexibility.
  • the vertical steel wires are spaced from one another by the same distance Dv of between 49 mm and 52 mm.
  • Dv distance between 49 mm and 52 mm.
  • Such a vertical distance advantageously makes it possible to prevent an intruder from placing his foot on a horizontal steel wire between two vertical steel wires. The risk of crossing the fence is thus reduced.
  • a large number of vertical steel wires does not prevent packaging of the mesh in a roll since the vertical steel wires run parallel to the winding axis and are preferably made of steel. soft.
  • the mesh comprises second meshes having a height, defined between two adjacent horizontal steel wires, of between 100 mm and 103 mm.
  • Such second meshes make it possible to locally reinforce part of the mesh.
  • the mesh comprises a lower part and / or an upper part comprising only second stitches.
  • the use of second meshes at the lower part and / or the upper part makes it possible to reinforce the lower and / or upper edge, which facilitates the installation of the mesh with a winder while improving the mechanical strength of the mesh when it is placed or when it is packaged in a roll.
  • the lower part makes it possible to optimize the fixing of a buried auxiliary screen which will provide sufficient coverage by bonding to the steel wires of the lower part.
  • the mesh comprises only first meshes having a height, defined between two adjacent horizontal steel wires, comprised between 200 mm and 203 mm, and second meshes having a height, defined between two adjacent horizontal steel wires, comprised between between 100 mm and 103 mm.
  • a mesh with two types of mesh advantageously makes it possible to facilitate the cooperation of two identical screens by vertical overlap in order to form a very high mesh. In addition, this makes it possible to simplify the manufacture of the mesh by means of an automatic device.
  • the mesh is packaged in a roll, preferably 25 m or 50 m.
  • Packaging in a roll makes it possible to facilitate installation compared to rigid panels according to the prior art.
  • the invention also relates to a security fence comprising at least one mesh as presented above and a plurality of posts tensioning said mesh, each post comprising a base planted in the ground. Due to its flexibility and reduced mass, the wire mesh can be fixed by means of planted posts, which is more practical and faster while having a limited environmental impact compared to sealed posts.
  • the auxiliary screen is buried in the ground to a depth at least equal to 50 cm.
  • the risk of intrusion while digging is limited.
  • the security fence 1 comprises several vertical posts 2, planted in the ground S, which are fixed to the mesh 3.
  • the mesh 3 consists of a plurality of horizontal steel wires 31 secured to a plurality of vertical steel wires. 32.
  • the steel wires 31, 32 are preferably joined together by welding, in particular electrically.
  • the vertical steel wires 32 have a height greater than 1.80 m, preferably between 2.30 m and 2.60 m, preferably equal to 2.45 m.
  • the horizontal steel wires 31 and the vertical steel wires 32 have a diameter of between 3.7 mm and 3.9 mm, preferably equal to 3.8 mm.
  • the safety mesh 3 has a rigidity and a resistance which are lower than that of a rigid panel according to the prior art, which makes it possible to condition the roll safety mesh in a manner analogous to a mesh. according to the prior art.
  • such a diameter allows the grid 3 to be maintained by means of vertical posts 2 which can be planted in the ground S, that is to say, without requiring concrete blocks.
  • the mesh 3 offers sufficient flexibility to allow it to be laid taut in a sloping area.
  • the wire mesh 3 according to the invention has greater rigidity and strength, which makes it possible to prevent the passage of intruders such as game.
  • Such a mesh 3 benefits from the advantages of a rigid panel and of a flexible traditional mesh according to the prior art, which makes its application optimal for protecting a railway area.
  • the mesh 3 comprises horizontal 31 and vertical 32 steel wires which are made of mild steel.
  • the flexibility of the mesh 3 is important even for a steel wire diameter between 3.7 mm and 3.9 mm. Its cost is also reduced. The use of the same type of steel wire makes it possible to limit costs.
  • the vertical steel wires 32 are spaced apart by the same spacing distance Dv which is less than 52 mm in order to prevent an intruder from providing a fulcrum for climbing the fence 3.
  • the distance d 'spacing Dv is greater than 49 mm so as to limit the mass of the mesh 3.
  • a spacing distance Dv equal to 50.8 mm is preferred because it offers a compromise between safety and reduction in mass in order to allow packaging wire netting 3 in rolls of 25 m or 50 m which can be carried by a man without difficulty or by a traditional machine.
  • the horizontal steel wires 31 are few in number and are spaced a greater distance so as to connect the vertical steel wires 32 without penalizing the mass of the mesh 3.
  • the vertical steel wires 31 extend vertically upwardly from the horizontal steel wire 32 located uppermost so as to form protective pins 33 preventing an intruder from leaning on the edge top of wire mesh 3 to climb it.
  • the length of the protective pins 33 is between 10 mm and 30 mm, preferably equal to 20 mm.
  • the mesh 3 can comprise an upper horizontal wire and / or a lower horizontal wire of increased rigidity (semi-hard steel) so as to increase the resistance at the ends of the mesh 3, which improves its mechanical strength.
  • the height of a first mesh M1 is defined to allow sufficient support for the vertical steel wires 32 without penalizing the mass of the mesh 3.
  • the second mesh M2 makes it possible to increase the rigidity of the mesh 3 locally, which allows avoid the separation of the steel wires 31, 32 when tensioning the mesh 3 on the posts 2.
  • each post 2 comprises a planted base which is preferably in the form of a bevelled portion (not shown) adapted to be introduced into the ground.
  • Each post 2 preferably comprises notches for fixing the mesh 3, in particular to cooperate with the horizontal steel wires 31.
  • the posts 2 can be spaced 4 to 5 meters apart, given that the mesh 3 has reduced mass.
  • the auxiliary mesh 4 is fixed to the lower part 3A of the mesh 3, in particular, by stapling.
  • a reinforced lower part 3A is thus advantageous because it makes it possible to ensure optimal support of the auxiliary grid 4.
  • the auxiliary mesh 4 has square meshes of 50 mm by 50 mm so as to allow optimum fixing with the lower part 3A of the mesh 3.
  • one mesh of the auxiliary mesh 4 is two. times less than a mesh of the lower part 3A, which offers flexibility when fixing while being practical.
  • FIG. 5 With reference to the figure 5 , there is shown a fence 3 according to the invention positioned on a sloping ground by means of vertical posts 2 planted. Unlike the prior art, there are no spaces between the floor S and the fence 3 through which game can circulate. The use of a partially buried auxiliary screen 4 makes it possible to significantly limit the risk.
  • the fence 1 is stretched by means of a plurality of posts 2 comprising a base which is planted directly in the ground S, without requiring concrete studs as in the prior art.
  • the mesh 3 is packaged in a roll prior to installation.
  • a trench is made in a preliminary manner and then the lower part of the auxiliary screen 4 is buried in the trench. Then, the upper part of the auxiliary mesh 4 is fixed to the second mesh M2 of the lower part 3A of the mesh 3 according to the invention by stapling in order to make them integral with each other.
  • the cost of securing an area with a security fence 1 is reduced by a factor of 8 to 10, which presents a significant economic advantage when the area to be secured is large as is. the case in the railway sector.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fencing (AREA)
  • Catching Or Destruction (AREA)

Description

DOMAINE TECHNIQUE GENERAL ET ART ANTERIEURGENERAL TECHNICAL FIELD AND PRIOR ART

La présente invention concerne une clôture de sécurité pour empêcher le passage d'un intrus, par exemple une personne ou un animal, dans une zone protégée et sensible, urbanisée ou non, présentant un risque fort d'intrusion, en particulier sur une voie ferroviaire.The present invention relates to a security fence to prevent the passage of an intruder, for example a person or an animal, in a protected and sensitive area, urbanized or not, presenting a high risk of intrusion, in particular on a railway track. .

De manière connue, une clôture de sécurité est généralement montée à la périphérie de zones dangereuses, par exemple une voie ferroviaire, afin d'éviter que des personnes ou des animaux ne circulent dans la zone dangereuse par inadvertance. Une clôture de sécurité est un équipement commun et qui est utilisé aussi bien par les professionnels que par les particuliers.In a known manner, a security fence is generally mounted on the periphery of dangerous areas, for example a railway track, in order to prevent people or animals from inadvertently circulating in the dangerous zone. A security fence is common equipment and is used by professionals as well as individuals.

Pour former une clôture de sécurité, il est connu d'utiliser des panneaux rigides en fils d'acier qui sont positionnés de manière adjacente. En pratique, les fils d'acier rigides possèdent un diamètre compris entre 4 et 6 mm et sont soudés entre eux puis galvanisés ou revêtus d'une protection organique additionnelle. Des poteaux spécifiques sont utilisés pour maintenir les panneaux rigides en position. Les poteaux sont espacés et scellés dans le sol à l'aide de socles en béton. De manière connue, un espacement de 2,5 m est généralement observé. EP 2 923 779 A1 divulgue un tel panneau rigide selon la préambule de la revendication 1.To form a security fence, it is known to use rigid steel wire panels which are positioned adjacent. In practice, the rigid steel wires have a diameter of between 4 and 6 mm and are welded together then galvanized or coated with additional organic protection. Specific posts are used to hold the rigid panels in position. The posts are spaced apart and sealed into the ground using concrete pedestals. In known manner, a spacing of 2.5 m is generally observed. EP 2 923 779 A1 discloses such a rigid panel according to the preamble of claim 1.

De tels panneaux rigides présentent de nombreux inconvénients. Le coût unitaire d'un panneau est élevé étant donné qu'il possède un nombre de fils d'acier important et de grand diamètre. Le poids d'un tel panneau rigide est également important, ce qui rend difficile sa manipulation et impose d'utiliser des poteaux scellés. De plus, l'utilisation de béton pour sceller les poteaux n'est pas désirée étant donné que cela impacte négativement l'environnement et augmente le temps de pose et donc son coût. Un panneau rigide présente également l'inconvénient de pouvoir être aisément volé en le coupant au droit d'un poteau, ce qui augmente le coût global d'une telle clôture en extérieur sur de grandes distances, en particulier, pour une application ferroviaire.Such rigid panels have many drawbacks. The unit cost of a panel is high since it has a large number of large diameter steel wires. The weight of such a rigid panel is also important, which makes it difficult to handle and requires the use of sealed posts. In addition, the use of concrete to seal the posts is not desired since this negatively impacts the environment and increases the installation time and therefore its cost. A rigid panel also has the drawback of being able to be easily stolen by cutting it in line with a post, which increases the overall cost of such a fence outdoors over long distances, in particular, for a railway application.

Un autre inconvénient important d'un tel panneau rigide est qu'il manque de flexibilité et n'est pas toujours parfaitement efficace sur certains types de terrains. En effet, le panneau ne permet pas de clôturer de manière optimale une zone en pente. Aussi, en référence à la figure 1, après la mise en place de panneaux rigides 9 entre des poteaux 90 scellés dans le sol S, il existe des espaces E entre le sol S et les panneaux 90 par lesquels peuvent circuler du gibier. Ces espaces E doivent être comblés avec des moyens artisanaux ou en ajoutant des portions en béton, ce qui impacte négativement l'environnement et augmente le coût.Another important drawback of such a rigid panel is that it lacks flexibility and is not always perfectly effective on certain types of terrain. Indeed, the panel does not make it possible to optimally enclose a sloping area. Also, with reference to the figure 1 , after the establishment of rigid panels 9 between posts 90 sealed in the ground S, there are spaces E between the ground S and the panels 90 through which game can circulate. These spaces E must be filled with artisanal means or by adding concrete portions, which negatively impacts the environment and increases the cost.

Pour éliminer ces inconvénients, une solution immédiate serait d'utiliser un grillage traditionnel en fils d'acier souples conditionné en rouleau et dont le diamètre est compris entre 2 et 3,5 mm. L'avantage d'un tel grillage est qu'il peut être fixé au sol au moyens de poteaux pouvant être plantés directement dans le sol, c'est-à-dire, sans recourir à un scellement avec du béton, ce qui permet une pose en suivant le profil du terrain.To eliminate these drawbacks, an immediate solution would be to use a traditional netting made of flexible steel wires packaged in a roll and the diameter of which is between 2 and 3.5 mm. The advantage of such a mesh is that it can be fixed to the ground by means of posts which can be planted directly into the ground, that is to say, without resorting to sealing with concrete, which allows a pose following the profile of the land.

Néanmoins, un tel grillage manque de résistance et de rigidité. Les fils d'acier peuvent être aisément déformés. De plus, les mailles du grillage sont souvent larges et souples et ne protègent pas d'un intrus qui peut escalader la clôture. De plus, la section des fils et la taille des mailles du grillage sont telle qu'elles ne peuvent pas résister à un enfoncement d'un animal de poids important.However, such a mesh lacks strength and rigidity. Steel wires can be easily deformed. In addition, the mesh of the fence is often large and flexible and does not protect an intruder who can climb the fence. In addition, the section of the threads and the size of the mesh of the mesh are such that they cannot withstand a dent from an animal of significant weight.

Il existe un besoin pour une clôture qui soit aisée à poser, de coût réduit et qui offre une résistance importante lors d'un choc avec un animal tout en réduisant le risque de franchissement par une personne.There is a need for a fence which is easy to install, low in cost and which offers high resistance in the event of an impact with an animal while reducing the risk of a person crossing it.

De manière incidente, on connait par le document DE2650578A1 un grillage dont le rapport de taille entre les mailles inférieures et les mailles supérieures est adapté au rapport de taille du gros gibier par rapport au petit gibier. Le document JPH08240040A1 enseigne un grillage comportant une bande de protection supérieure afin d'éviter sa déformation. Le document WO206/114290 enseigne un panneau grillagé qui comporte des fils horizontaux qui sont pris en sandwich entre une pluralités de paires de fils verticaux.Incidentally, we know from the document DE2650578A1 a wire mesh whose size ratio between the lower meshes and the upper meshes is adapted to the size ratio of the big game compared to the small game. The document JPH08240040A1 teaches a wire mesh having an upper protective strip in order to avoid its deformation. The document WO206 / 114290 teaches a mesh panel which has horizontal wires that are sandwiched between a plurality of pairs of vertical wires.

PRESENTATION GENERALE DE L'INVENTIONGENERAL PRESENTATION OF THE INVENTION

A cet effet, l'invention concerne un grillage pour clôture de sécurité, le grillage étant constitué de fils d'acier horizontaux solidarisés à des fils d'acier verticaux ayant une hauteur supérieure à 1m80, les fils d'acier verticaux étant espacés les uns des autres d'une même distance.To this end, the invention relates to a mesh for a security fence, the mesh consisting of horizontal steel wires secured to vertical steel wires having a height greater than 1.80 m, the vertical steel wires being spaced apart. others from the same distance.

Selon l'invention, les fils d'acier horizontaux et les fils d'acier verticaux ont un diamètre compris entre 3,7 mm et 3,9 mm.According to the invention, the horizontal steel wires and the vertical steel wires have a diameter of between 3.7 mm and 3.9 mm.

De tels fils d'acier sont plus fins que des fils d'acier d'un panneau rigide selon l'art antérieur, ce qui permet de réduire la masse du grillage. En outre, de tels fils d'acier offrent une plus grande flexibilité, ce qui permet, d'une part, de poser le grillage dans des zones en pente et, d'autre part, de conditionner le grillage en rouleau. Un conditionnement en rouleau permet de faciliter la pose, en particulier, au moyen d'engins équipés d'un dérouleur. Le temps et le coût de pose d'un mètre linéaire sont réduits de manière importante. Un diamètre compris entre 3,7 mm et 3,9 mm permet d'offrir un compromis entre résistance et flexibilité, ce qui permet de bénéficier des avantages d'un panneau rigide et de ceux d'un grillage traditionnel souple selon l'art antérieur.Such steel wires are thinner than steel wires of a rigid panel according to the prior art, which makes it possible to reduce the mass of the mesh. In addition, such steel wires offer greater flexibility, which makes it possible, on the one hand, to lay the mesh in sloping areas and, on the other hand, to condition the mesh in a roll. Packaging in a roll facilitates installation, in particular by means of equipment equipped with an unwinder. The time and cost of laying a linear meter are significantly reduced. A diameter of between 3.7 mm and 3.9 mm makes it possible to offer a compromise between resistance and flexibility, which makes it possible to benefit from the advantages of a rigid panel and those of a traditional flexible mesh according to the prior art. .

Pour l'homme du métier spécialiste des clôtures de sécurité, il existe un préjugé technique selon lequel une clôture de grande hauteur, supérieure à 1m80, est nécessairement réalisée par un panneau rigide avec des fils d'acier de grand diamètre pour assurer la sécurité, ce qui empêchait tout conditionnement en rouleau. La présente invention va à l'encontre de ce préjugé technique en réduisant le diamètre des fils d'acier tout en modifiant la forme des mailles pour conserver une sécurité élevée. Grâce à l'invention, un conditionnement en rouleau est enfin possible, ce qui réduit de manière importante les coûts de pose.For those skilled in the art of security fencing, there is a technical prejudice according to which a high fence, greater than 1m80, is necessarily made by a rigid panel with large diameter steel wires to ensure safety, which prevented any packaging on a roll. The present invention goes against this technical prejudice by reducing the diameter of the steel wires while modifying the shape of the meshes to maintain high security. Thanks to the invention, packaging in a roll is finally possible, which significantly reduces the installation costs.

De plus, il existe également un préjugé technique sur l'utilisation d'un grillage traditionnel souple pour former une clôture de sécurité compte tenu des inconvénients cités précédemment (fils d'acier de faible diamètre, résistance faible, mailles espacées, etc.). L'homme du métier est allé à l'encontre de ce préjugé technique pour former un grillage performant et robuste tout en pouvant être conditionné en rouleau.In addition, there is also a technical prejudice on the use of a traditional flexible mesh to form a security fence given the drawbacks mentioned above (small diameter steel wires, low resistance, spaced meshes, etc.). Those skilled in the art went against this technical prejudice to form a powerful and robust mesh while being able to be packaged in rolls.

De manière préférée, les fils d'acier verticaux ont une hauteur supérieure à 2m, de préférence encore, supérieure à 2m50. De manière avantageuse, les fils d'acier verticaux ont une hauteur inférieure à 2m60 de manière à faciliter la pose.Preferably, the vertical steel wires have a height greater than 2 m, more preferably greater than 2.50 m. Advantageously, the vertical steel wires have a height of less than 2m60 so as to facilitate installation.

De préférence, les fils d'acier horizontaux et les fils d'acier verticaux ont un diamètre de 3,8 mm. Un tel diamètre offre le meilleur compromis entre masse et flexibilité.Preferably, the horizontal steel wires and the vertical steel wires have a diameter of 3.8 mm. Such a diameter offers the best compromise between mass and flexibility.

De manière préférée, les fils d'acier horizontaux et les fils d'acier verticaux sont en acier doux. Un acier doux offre une plus grande flexibilité, ce qui permet de poser le grillage dans des zones avec du relief. En outre, un conditionnement en rouleau de faible diamètre est également possible. De manière avantageuse, ce type d'acier permet au grillage d'être conditionné en rouleau et de garantir un déroulage, lors de la pose, sans risque de rupture des soudures.Preferably, the horizontal steel wires and the vertical steel wires are made of mild steel. Mild steel offers greater flexibility, which allows the mesh to be laid in areas with relief. In addition, small diameter roll packaging is also possible. Advantageously, this type of steel allows the mesh to be packaged in a roll and to guarantee unwinding, during installation, without risk of rupture of the welds.

Selon l'invention, les fils d'acier verticaux sont espacés les uns des autres d'une même distance Dv comprise entre 49 mm et 52 mm. Une telle distance verticale permet avantageusement d'interdire à un intrus de poser son pied sur un fil d'acier horizontal entre deux fils d'acier verticaux. Le risque de franchissement du grillage est ainsi réduit. De plus, un grand nombre de fils d'acier verticaux n'empêche pas un conditionnement en rouleau du grillage étant donné que les fils d'acier verticaux s'étendent parallèlement à l'axe d'enroulement et sont, de préférence, en acier doux.According to the invention, the vertical steel wires are spaced from one another by the same distance Dv of between 49 mm and 52 mm. Such a vertical distance advantageously makes it possible to prevent an intruder from placing his foot on a horizontal steel wire between two vertical steel wires. The risk of crossing the fence is thus reduced. In addition, a large number of vertical steel wires does not prevent packaging of the mesh in a roll since the vertical steel wires run parallel to the winding axis and are preferably made of steel. soft.

Selon un aspect préféré, le grillage comprend entre 15 et 19 fils d'acier horizontaux lorsque le grillage possède une hauteur comprise entre 2m30 et 2m60. De préférence, la densité linéaire de fils horizontaux selon la direction verticale est comprise entre 6 et 8. De manière avantageuse, le nombre de fils d'acier horizontaux est très réduit par comparaison au nombre de fils d'acier verticaux, ce qui permet de limiter la masse du grillage de manière importante tout en garantissant une sécurité élevée. En outre, un faible nombre de fils d'acier horizontaux permet de faciliter un conditionnement en rouleau du grillage avec les fils d'acier verticaux s'étendant parallèlement à l'axe d'enroulement. Ainsi, la forme des mailles du grillage permet avantageusement de conserver une sécurité élevée tout en permettant un conditionnement optimal.According to a preferred aspect, the mesh comprises between 15 and 19 horizontal steel wires when the mesh has a height of between 2m30 and 2m60. Preferably, the linear density of horizontal wires in the vertical direction is between 6 and 8. Advantageously, the number of horizontal steel wires is very small compared to the number of vertical steel wires, which makes it possible to significantly limit the weight of the mesh while ensuring high safety. In addition, a low number of horizontal steel wires facilitates roll packaging of the mesh with the vertical steel wires extending parallel to the axis. winding. Thus, the shape of the mesh of the mesh advantageously makes it possible to maintain high security while allowing optimal packaging.

Selon l'invention, le grillage comporte des premières mailles ayant une hauteur, définie entre deux fils d'acier horizontaux adjacents, comprise entre 200 mm et 203 mm. De telles premières mailles permettent de limiter le risque de déformation des fils verticaux.According to the invention, the mesh comprises first meshes having a height, defined between two adjacent horizontal steel wires, of between 200 mm and 203 mm. Such first stitches make it possible to limit the risk of deformation of the vertical cords.

De préférence, le grillage comporte des deuxièmes mailles ayant une hauteur, définie entre deux fils d'acier horizontaux adjacents, comprise entre 100 mm et 103 mm. De telles deuxièmes mailles permettent de renforcer de manière locale une partie du grillage.Preferably, the mesh comprises second meshes having a height, defined between two adjacent horizontal steel wires, of between 100 mm and 103 mm. Such second meshes make it possible to locally reinforce part of the mesh.

Selon un aspect préféré, le grillage comporte une partie inférieure et/ou une partie supérieure comportant uniquement des deuxièmes mailles. L'utilisation de deuxièmes mailles au niveau de la partie inférieure et/ou de la partie supérieure permet de renforcer le bord inférieur et/ou supérieur, ce qui facilite la pose du grillage avec un enrouleur tout en améliorant la tenue mécanique du grillage lorsqu'il est posé ou lorsqu'il est conditionné en rouleau. En outre, la partie inférieure permet d'optimiser la fixation d'un grillage auxiliaire enterré qui viendra assurer un recouvrement suffisant par liaison aux fils d'acier de la partie inférieure.According to a preferred aspect, the mesh comprises a lower part and / or an upper part comprising only second stitches. The use of second meshes at the lower part and / or the upper part makes it possible to reinforce the lower and / or upper edge, which facilitates the installation of the mesh with a winder while improving the mechanical strength of the mesh when it is placed or when it is packaged in a roll. In addition, the lower part makes it possible to optimize the fixing of a buried auxiliary screen which will provide sufficient coverage by bonding to the steel wires of the lower part.

De préférence, le grillage comporte uniquement des premières mailles ayant une hauteur, définie entre deux fils d'acier horizontaux adjacents, comprise entre 200 mm et 203 mm et des deuxièmes mailles ayant une hauteur, définie entre deux fils d'acier horizontaux adjacents, comprise entre 100 mm et 103 mm. Un grillage avec deux types de mailles permet avantageusement de faciliter la coopération de deux grillages identiques par chevauchement vertical afin de former un grillage de grande hauteur. En outre, cela permet de simplifier la fabrication du grillage au moyen d'un automate.Preferably, the mesh comprises only first meshes having a height, defined between two adjacent horizontal steel wires, comprised between 200 mm and 203 mm, and second meshes having a height, defined between two adjacent horizontal steel wires, comprised between between 100 mm and 103 mm. A mesh with two types of mesh advantageously makes it possible to facilitate the cooperation of two identical screens by vertical overlap in order to form a very high mesh. In addition, this makes it possible to simplify the manufacture of the mesh by means of an automatic device.

De préférence encore, le grillage comporte une partie intermédiaire constituée d'une répétition de modules de maillage identiques, chaque module de maillage comportant au moins une première maille ayant une hauteur, définie entre deux fils d'acier horizontaux adjacents, comprise entre 200 mm et 203 mm et au moins une deuxième maille ayant une hauteur, définie entre deux fils d'acier horizontaux adjacents, comprise entre 100 mm et 103 mm. Une telle répétition permet de renforcer localement le grillage à intervalles réguliers en évitant de former une zone peu dense qui puisse être facilement déformée par un intrus. La résistance du grillage est importante malgré un nombre réduit de fils d'acier horizontaux.More preferably, the mesh comprises an intermediate part consisting of a repetition of identical mesh modules, each mesh module comprising at least a first mesh having a height, defined between two adjacent horizontal steel wires, between 200 mm and 203 mm and at least one second mesh having a height, defined between two horizontal steel wires adjacent, between 100 mm and 103 mm. Such a repetition makes it possible to locally reinforce the mesh at regular intervals while avoiding forming a sparingly dense zone which can be easily deformed by an intruder. The resistance of the mesh is important despite a reduced number of horizontal steel wires.

De manière préférée, chaque module de maillage est constitué de deux premières mailles et d'une deuxième maille. Un tel module de maillage permet d'assurer un compromis entre masse et résistance.Preferably, each mesh module consists of two first meshes and a second mesh. Such a mesh modulus makes it possible to ensure a compromise between mass and resistance.

De préférence, les fils d'acier verticaux s'étendent en saillie verticale vers le haut par rapport au fil d'acier horizontal situé le plus en haut de manière à former des picots de protection. De tels picots de protection permettent d'empêcher un intrus de s'agripper au bord supérieur du grillage afin de l'escalader. De manière avantageuse, la multiplicité des fils d'acier verticaux limite le risque d'intrusion.Preferably, the vertical steel wires extend vertically protruding upward from the uppermost horizontal steel wire so as to form protective pins. Such protective pins make it possible to prevent an intruder from clinging to the upper edge of the fence in order to climb it. Advantageously, the multiplicity of vertical steel wires limits the risk of intrusion.

Selon un aspect préféré, le grillage est conditionné en rouleau, de préférence de 25 m ou de 50 m. Un conditionnement en rouleau permet de faciliter la pose par comparaison à des panneaux rigides selon l'art antérieur.According to a preferred aspect, the mesh is packaged in a roll, preferably 25 m or 50 m. Packaging in a roll makes it possible to facilitate installation compared to rigid panels according to the prior art.

L'invention concerne également une clôture de sécurité comprenant au moins un grillage tel que présenté précédemment et une pluralité de poteaux mettant en tension ledit grillage, chaque poteau comportant une embase plantée dans le sol. Du fait de sa flexibilité et de sa masse réduite, le grillage peut être fixé au moyen de poteaux plantés, ce qui est plus pratique et plus rapide tout en ayant un impact environnemental limité par comparaison avec des poteaux scellés.The invention also relates to a security fence comprising at least one mesh as presented above and a plurality of posts tensioning said mesh, each post comprising a base planted in the ground. Due to its flexibility and reduced mass, the wire mesh can be fixed by means of planted posts, which is more practical and faster while having a limited environmental impact compared to sealed posts.

De préférence, la clôture comprend un grillage auxiliaire qui est monté en recouvrement partiel du grillage, en particulier, de sa partie inférieure. De préférence encore, le grillage auxiliaire ne s'étend pas sur la partie intermédiaire du grillage. Un tel grillage permet d'éviter l'intrusion d'animaux creusant sous le grillage. Le grillage auxiliaire est avantageusement supporté par le grillage, notamment, par sa partie inférieure qui est renforcée.Preferably, the fence comprises an auxiliary mesh which is mounted to partially cover the mesh, in particular, its lower part. More preferably, the auxiliary screen does not extend over the intermediate part of the screen. Such a fence makes it possible to avoid the intrusion of animals digging under the fence. The auxiliary mesh is advantageously supported by the mesh, in particular, by its lower part which is reinforced.

De manière préférée, le grillage auxiliaire est enterré dans le sol sur une profondeur au moins égale à 50 cm. Ainsi, le risque d'intrusion en creusant est limité.Preferably, the auxiliary screen is buried in the ground to a depth at least equal to 50 cm. Thus, the risk of intrusion while digging is limited.

L'invention concerne également un procédé de pose d'une clôture de sécurité telle que présentée précédemment, le procédé comportant :

  • une étape de fixation d'une extrémité d'un grillage conditionné en rouleau,
  • une étape de déroulement dudit grillage et
  • une étape de plantage des poteaux dans le sol et de fixation des poteaux au grillage au fur et à mesure de son déroulement.
The invention also relates to a method for installing a security fence as presented above, the method comprising:
  • a step of fixing one end of a mesh packaged in a roll,
  • a step of unwinding said toasting and
  • a step of planting the posts in the ground and fixing the posts to the fence as it unfolds.

Un tel procédé de pose est rapide et économique par comparaison à des panneaux rigides selon l'art antérieur scellé avec du béton.Such an installation method is rapid and economical compared to rigid panels according to the prior art sealed with concrete.

L'invention concerne aussi une utilisation d'une clôture telle que présentée précédemment pour empêcher l'accès à une voie ferroviaire.The invention also relates to a use of a fence as presented above to prevent access to a railway track.

PRESENTATION DES FIGURESPRESENTATION OF FIGURES

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple, et se référant aux dessins annexés sur lesquels :

  • la figure 1 est une représentation schématique d'une clôture de sécurité selon l'art antérieur comportant des panneaux rigides sur un sol en pente,
  • la figure 2 est une représentation schématique d'une clôture de sécurité comportant un grillage selon l'invention,
  • la figure 3 est une représentation schématique partielle du grillage de la figure 2,
  • la figure 4 est une représentation schématique d'une clôture de sécurité comportant un grillage selon l'invention et un grillage auxiliaire partiellement enterré et
  • la figure 5 est une représentation schématique d'un grillage selon l'invention mis en place dans un terrain en pente.
The invention will be better understood on reading the description which will follow, given solely by way of example, and referring to the appended drawings in which:
  • the figure 1 is a schematic representation of a security fence according to the prior art comprising rigid panels on a sloping ground,
  • the figure 2 is a schematic representation of a security fence comprising a mesh according to the invention,
  • the figure 3 is a partial schematic representation of the wire mesh figure 2 ,
  • the figure 4 is a schematic representation of a security fence comprising a mesh according to the invention and an auxiliary mesh partially buried and
  • the figure 5 is a schematic representation of a fence according to the invention placed in a sloping ground.

Il faut noter que les figures exposent l'invention de manière détaillée pour mettre en œuvre l'invention, lesdites figures pouvant bien entendu servir à mieux définir l'invention le cas échéant.It should be noted that the figures set out the invention in detail in order to implement the invention, said figures being able of course to serve to better define the invention if necessary.

DESCRIPTION D'UN OU PLUSIEURS MODES DE REALISATION ET DE MISE EN OEUVREDESCRIPTION OF ONE OR MORE EMBODIMENTS AND IMPLEMENTATION

En référence à la figure 2, il est représenté une clôture de sécurité 1 selon une forme de réalisation de l'invention.With reference to the figure 2 , there is shown a security fence 1 according to one embodiment of the invention.

La clôture de sécurité 1 comporte plusieurs poteaux verticaux 2, plantés dans le sol S, qui sont fixés au grillage 3. Le grillage 3 est constitué d'une pluralité de fils d'acier horizontaux 31 solidarisés à une pluralité de fils d'acier verticaux 32. Les fils d'acier 31, 32 sont de préférence solidarisés par soudage, en particulier, de manière électrique. Comme le grillage 3 est destiné à éviter des intrusions, en particuliers de personnes ou d'animaux, les fils d'acier verticaux 32 ont une hauteur supérieure à 1m80, de préférence, comprise entre 2m30 et 2m60, de préférence égale à 2m45.The security fence 1 comprises several vertical posts 2, planted in the ground S, which are fixed to the mesh 3. The mesh 3 consists of a plurality of horizontal steel wires 31 secured to a plurality of vertical steel wires. 32. The steel wires 31, 32 are preferably joined together by welding, in particular electrically. As the mesh 3 is intended to prevent intrusions, in particular from people or animals, the vertical steel wires 32 have a height greater than 1.80 m, preferably between 2.30 m and 2.60 m, preferably equal to 2.45 m.

Selon l'invention, les fils d'acier horizontaux 31 et les fils d'acier verticaux 32 ont un diamètre compris entre 3,7 mm et 3,9 mm, de préférence, égal à 3,8 mm. Ainsi, de manière avantageuse, le grillage de sécurité 3 possède une rigidité et une résistance qui sont inférieures à celle d'un panneau rigide selon l'art antérieur, ce qui permet de conditionner le grillage de sécurité en rouleau de manière analogue à un grillage selon l'art antérieur.According to the invention, the horizontal steel wires 31 and the vertical steel wires 32 have a diameter of between 3.7 mm and 3.9 mm, preferably equal to 3.8 mm. Thus, advantageously, the safety mesh 3 has a rigidity and a resistance which are lower than that of a rigid panel according to the prior art, which makes it possible to condition the roll safety mesh in a manner analogous to a mesh. according to the prior art.

De plus, un tel diamètre permet un maintien du grillage 3 au moyen de poteaux verticaux 2 pouvant être plantés dans le sol S, c'est-à-dire, sans nécessiter de blocs en béton. En outre, le grillage 3 offre une flexibilité suffisante lui permettant d'être posé de manière tendue dans une zone en pente.In addition, such a diameter allows the grid 3 to be maintained by means of vertical posts 2 which can be planted in the ground S, that is to say, without requiring concrete blocks. In addition, the mesh 3 offers sufficient flexibility to allow it to be laid taut in a sloping area.

En outre, un tel diamètre de fils d'acier 31, 32 permet d'éviter leur déformation afin de permettre à un intrus de se ménager un point d'appui pour escalader la clôture. Par comparaison à un grillage traditionnel souple selon l'art antérieur, le grillage 3 selon l'invention possède une rigidité et une résistance supérieures ce qui permet d'empêcher le passage d'intrus tels que du gibier.In addition, such a diameter of steel wires 31, 32 makes it possible to prevent their deformation in order to allow an intruder to provide a fulcrum for climbing the fence. By comparison with a traditional flexible wire mesh according to the prior art, the wire mesh 3 according to the invention has greater rigidity and strength, which makes it possible to prevent the passage of intruders such as game.

Ainsi, un tel grillage 3 bénéficie des avantages d'un panneau rigide et d'un grillage traditionnel souple selon l'art antérieur, ce qui rend son application optimale pour protéger une zone ferroviaire.Thus, such a mesh 3 benefits from the advantages of a rigid panel and of a flexible traditional mesh according to the prior art, which makes its application optimal for protecting a railway area.

De préférence, le grillage 3 comprend des fils d'acier horizontaux 31 et verticaux 32 qui sont réalisés en acier doux. Ainsi, la flexibilité du grillage 3 est importante même pour un diamètre de fil d'acier compris entre 3,7 mm et 3,9 mm. Son coût est également réduit. L'utilisation d'un même type de fils d'acier permet de limiter les coûts.Preferably, the mesh 3 comprises horizontal 31 and vertical 32 steel wires which are made of mild steel. Thus, the flexibility of the mesh 3 is important even for a steel wire diameter between 3.7 mm and 3.9 mm. Its cost is also reduced. The use of the same type of steel wire makes it possible to limit costs.

En référence à la figure 3, les fils d'acier verticaux 32 sont écartés d'une même distance d'écartement Dv qui est inférieure à 52 mm afin d'empêcher un intrus de ménager un point d'appui pour escalader le grillage 3. De préférence, la distance d'écartement Dv est supérieure à 49 mm de manière à limiter la masse du grillage 3. De manière préférée, une distance d'écartement Dv égale à 50.8 mm est préférée car elle offre un compromis entre sécurité et réduction de masse afin de permettre un conditionnement du grillage 3 en rouleau de 25 m ou 50 m pouvant être porté par un homme sans pénibilité ou par un engin traditionnel.With reference to the figure 3 , the vertical steel wires 32 are spaced apart by the same spacing distance Dv which is less than 52 mm in order to prevent an intruder from providing a fulcrum for climbing the fence 3. Preferably, the distance d 'spacing Dv is greater than 49 mm so as to limit the mass of the mesh 3. Preferably, a spacing distance Dv equal to 50.8 mm is preferred because it offers a compromise between safety and reduction in mass in order to allow packaging wire netting 3 in rolls of 25 m or 50 m which can be carried by a man without difficulty or by a traditional machine.

Ainsi, il n'est pas possible pour un intrus d'escalader le grillage 3 étant donné que celui-ci n'a pas suffisamment d'espace pour poser son pied sur un fil d'acier horizontal 31 entre deux fils d'acier verticaux 32 adjacents. La sécurité est ainsi grandement améliorée par rapport à l'art antérieur et le risque de franchissement par un intrus est réduit.Thus, it is not possible for an intruder to climb the fence 3 since it does not have enough space to put his foot on a horizontal steel wire 31 between two vertical steel wires. 32 adjacent. Security is thus greatly improved compared to the prior art and the risk of an intruder crossing is reduced.

De préférence, le nombre de fils d'acier horizontaux 31 est compris entre 15 et 19 lorsque le grillage possède une hauteur comprise entre 2m30 et 2m60. Dans cet exemple, le nombre de fils d'acier horizontaux 31 est de 17 pour une hauteur verticale de 2,45m, ce qui correspond à une densité linéaire de 6,8 fils horizontaux par mètre. De préférence, la densité linéaire de fils horizontaux 31 selon la direction verticale est comprise entre 6 et 8 de manière à réduire la masse du grillage 3.Preferably, the number of horizontal steel wires 31 is between 15 and 19 when the mesh has a height of between 2m30 and 2m60. In this example, the number of horizontal steel wires 31 is 17 for a vertical height of 2.45 m, which corresponds to a linear density of 6.8 horizontal wires per meter. Preferably, the linear density of horizontal yarns 31 in the vertical direction is between 6 and 8 so as to reduce the mass of the mesh 3.

Par comparaison aux fils d'acier verticaux 32, les fils d'acier horizontaux 31 sont peu nombreux et sont espacés d'une distance supérieure de manière à relier les fils d'acier verticaux 32 sans pour autant pénaliser la masse du grillage 3.Compared to the vertical steel wires 32, the horizontal steel wires 31 are few in number and are spaced a greater distance so as to connect the vertical steel wires 32 without penalizing the mass of the mesh 3.

Dans cette forme de réalisation, en référence à la figure 2, le grillage 3 comporte une partie inférieure 3A, une partie intermédiaire 3B et une partie supérieure 3C.In this embodiment, with reference to the figure 2 , the mesh 3 comprises a lower part 3A, an intermediate part 3B and an upper part 3C.

Comme représenté en détails à la figure 3, la partie inférieure 3A comporte quatre fils d'acier horizontaux 31 écartés les uns des autres d'une distance d'écartement Dh2 comprise entre 100 mm et 103 mm, ce qui permet de renforcer l'extrémité inférieure du grillage 3. En outre, une telle partie inférieure 3A permet d'assurer un recouvrement et une fixation de manière optimale d'un grillage enterré sur les trois premiers fils d'acier horizontaux 31 comme cela sera présenté par la suite.As shown in detail at figure 3 , the lower part 3A comprises four horizontal steel wires 31 spaced apart from each other by a spacing distance Dh2 of between 100 mm and 103 mm, which makes it possible to reinforce the lower end of the mesh 3. In addition, such a lower part 3A makes it possible to ensure optimum covering and fixing of a buried mesh on the first three horizontal steel wires 31, as will be presented below.

De manière analogue, la partie supérieure 3C comporte trois fils d'acier horizontaux 31 écartés les uns des autres d'une même distance d'écartement Dh2, ce qui permet de renforcer l'extrémité supérieure du grillage 3.Similarly, the upper part 3C comprises three horizontal steel wires 31 spaced apart from each other by the same spacing distance Dh2, which makes it possible to reinforce the upper end of the mesh 3.

En référence aux figures 2 et 3, les fils d'acier verticaux 31 s'étendent en saillie verticale vers le haut par rapport au fil d'acier horizontal 32 situé le plus en haut de manière à former des picots de protection 33 empêchant à un intrus de prendre appui sur le bord supérieur du grillage 3 pour l'escalader. De préférence, en référence aux figures 3 et 4, la longueur des picots de protection 33 est comprise entre 10 mm et 30 mm, de préférence égale à 20 mm.With reference to figures 2 and 3 , the vertical steel wires 31 extend vertically upwardly from the horizontal steel wire 32 located uppermost so as to form protective pins 33 preventing an intruder from leaning on the edge top of wire mesh 3 to climb it. Preferably, with reference to figures 3 and 4 , the length of the protective pins 33 is between 10 mm and 30 mm, preferably equal to 20 mm.

De manière préférée, le grillage 3 peut comprendre un fil horizontal supérieur et/ou un fil horizontal inférieur de rigidité accrue (acier demi dur) de manière à augmenter la résistance aux extrémités du grillage 3, ce qui améliore sa tenue mécanique.Preferably, the mesh 3 can comprise an upper horizontal wire and / or a lower horizontal wire of increased rigidity (semi-hard steel) so as to increase the resistance at the ends of the mesh 3, which improves its mechanical strength.

Toujours en référence à la figure 3, la partie intermédiaire 3B comporte une répartition judicieuse des fils d'acier horizontaux 31 de manière à rendre solidaire les fils d'acier verticaux 32 sans pour autant pénaliser la masse du grillage 3. Dans cet exemple, la partie intermédiaire 3B comporte plusieurs répétitions (4 répétitions sur la figure 3) d'un module de maillage 5 comprenant deux premières mailles M1 suivies d'une deuxième maille M2. Dans cette forme de réalisation, la hauteur verticale Dh1 d'une première maille M1 est comprise entre 200mm et 203mm tandis que la hauteur verticale Dh2 d'une deuxième maille M2 est comprise entre 100mm et 103 mm, c'est-à-dire, identique, aux mailles de la partie inférieure 3A et de la partie supérieure 3C.Still with reference to the figure 3 , the intermediate part 3B comprises a judicious distribution of the horizontal steel wires 31 so as to make the vertical steel wires 32 integral without penalizing the mass of the mesh 3. In this example, the intermediate part 3B comprises several repetitions ( 4 repetitions on the figure 3 ) of a mesh module 5 comprising two first mesh cells M1 followed by a second mesh cell M2. In this embodiment, the vertical height Dh1 of a first mesh M1 is between 200mm and 203mm while the vertical height Dh2 of a second mesh M2 is between 100mm and 103mm, that is to say, identical to the meshes of the lower part 3A and of the upper part 3C.

De manière préférée, la hauteur verticale Dh1 d'une première maille M1 est un multiple de la hauteur verticale Dh2 d'une deuxième maille M2, de préférence, d'un facteur 2. Cela permet de faciliter la production du grillage 3 au moyen d'automate de production tout en permettant une mise en correspondance de mailles lors d'une superposition de grillages 3 selon l'invention. On peut ainsi augmenter la hauteur d'une clôture en superposant partiellement deux grillages 3.Preferably, the vertical height Dh1 of a first mesh M1 is a multiple of the vertical height Dh2 of a second mesh M2, preferably by a factor of 2. This makes it possible to facilitate the production of the mesh 3 by means of production automaton while allowing a matching of meshes during a superposition of grids 3 according to the invention. It is thus possible to increase the height of a fence by partially superimposing two grids 3.

La hauteur d'une première maille M1 est définie pour permettre un support suffisant des fils d'acier verticaux 32 sans pénaliser la masse du grillage 3. Les deuxièmes mailles M2 permettent d'augmenter la rigidité du grillage 3 de manière locale, ce qui permet d'éviter la désolidarisation des fils d'acier 31, 32 lors de la mise sous tension du grillage 3 sur les poteaux 2.The height of a first mesh M1 is defined to allow sufficient support for the vertical steel wires 32 without penalizing the mass of the mesh 3. The second mesh M2 makes it possible to increase the rigidity of the mesh 3 locally, which allows avoid the separation of the steel wires 31, 32 when tensioning the mesh 3 on the posts 2.

De manière préférée, le grillage 3 ne comporte que deux types de mailles : des premières mailles M1 ou des deuxièmes mailles M2. En référence à la figure 3, la partie inférieure 3A du grillage 3 et la partie supérieure 3C du grillage 3 ne comportent que des deuxièmes mailles M2. Outre les avantages esthétiques que présente l'utilisation d'uniquement deux types de mailles M1, M2, cela permet en outre d'associer ensemble deux grillages 3 qui sont décalés verticalement l'un par rapport à l'autre afin d'augmenter la hauteur de la clôture 1.Preferably, the mesh 3 has only two types of meshes: first meshes M1 or second meshes M2. With reference to the figure 3 , the lower part 3A of the mesh 3 and the upper part 3C of the mesh 3 only have second mesh M2. In addition to the aesthetic advantages of using only two types of mesh M1, M2, this also makes it possible to combine two grids 3 which are vertically offset with respect to each other in order to increase the height. of the fence 1.

Dans cet exemple, en référence à la figure 2, chaque poteau 2 comporte une embase plantée qui se présente, de manière préférée, sous la forme d'une portion biseautée (non représentée) adaptée pour être introduite dans le sol. Chaque poteau 2 comprend de préférence des encoches pour la fixation du grillage 3, en particulier pour coopérer avec les fils d'acier horizontaux 31. De manière avantageuse, les poteaux 2 peuvent être espacés de 4 à 5 mètres étant donné que le grillage 3 possède une masse réduite.In this example, with reference to the figure 2 , each post 2 comprises a planted base which is preferably in the form of a bevelled portion (not shown) adapted to be introduced into the ground. Each post 2 preferably comprises notches for fixing the mesh 3, in particular to cooperate with the horizontal steel wires 31. Advantageously, the posts 2 can be spaced 4 to 5 meters apart, given that the mesh 3 has reduced mass.

De manière additionnelle, en référence à la figure 4, la clôture de sécurité 1 peut comprendre un grillage auxiliaire 4 qui est monté en recouvrement du grillage 3 selon l'invention. Le grillage auxiliaire 4 est enterré dans le sol S sur une profondeur au moins égale à 50 cm de manière à interdire la circulation d'animaux sous le grillage 3 en creusant le sol S. Le grillage auxiliaire 4 ne s'étend au-dessus du sol S que sur quelques centimètres, de préférence 30 cm, et est supporté par le grillage 3 selon l'invention.Additionally, with reference to the figure 4 , the security fence 1 can include an auxiliary grid 4 which is mounted to cover the grid 3 according to invention. The auxiliary screen 4 is buried in the ground S to a depth at least equal to 50 cm so as to prohibit the movement of animals under the screen 3 by digging the soil S. The auxiliary screen 4 does not extend above the sol S only over a few centimeters, preferably 30 cm, and is supported by the mesh 3 according to the invention.

De préférence, le grillage auxiliaire 4 est fixé à la partie inférieure 3A du grillage 3, notamment, par agrafage. Une partie inférieure 3A renforcée est ainsi avantageuse car elle permet d'assurer un support optimal du grillage auxiliaire 4. La présence de deuxièmes mailles M2 de faibles dimensions permet de ménager plusieurs lieux de fixations proches les uns des autres, ce qui optimise la fixation du grillage auxiliaire 4. De manière préférée, le grillage auxiliaire 4 possède des mailles carrées de 50 mm par 50 mm de manière à permettre une fixation optimale avec la partie inférieure 3A du grillage 3. De manière avantageuse, une maille du grillage auxiliaire 4 est deux fois moins haute qu'une maille de la partie inférieure 3A, ce qui offre une flexibilité lors de la fixation tout en étant pratique.Preferably, the auxiliary mesh 4 is fixed to the lower part 3A of the mesh 3, in particular, by stapling. A reinforced lower part 3A is thus advantageous because it makes it possible to ensure optimal support of the auxiliary grid 4. The presence of second M2 meshes of small dimensions makes it possible to spare several fastening places close to each other, which optimizes the fastening of the auxiliary mesh 4. Preferably, the auxiliary mesh 4 has square meshes of 50 mm by 50 mm so as to allow optimum fixing with the lower part 3A of the mesh 3. Advantageously, one mesh of the auxiliary mesh 4 is two. times less than a mesh of the lower part 3A, which offers flexibility when fixing while being practical.

Le passage d'animaux sous la clôture 1 ou en partie inférieure est ainsi empêché de manière fiable. Une telle clôture 1 possède un coût de revient limité par comparaison aux autres clôtures qui sont partiellement enterrées.The passage of animals under the fence 1 or in the lower part is thus reliably prevented. Such a fence 1 has a limited cost price compared to other fences which are partially buried.

En référence à la figure 5, il est représenté un grillage 3 selon l'invention positionné sur un terrain en pente par l'intermédiaire de poteaux verticaux 2 plantés. Contrairement à l'art antérieur, il n'existe pas d'espaces entre le sol S et le grillage 3 par lesquels peuvent circuler du gibier. L'utilisation d'un grillage auxiliaire 4 partiellement enterré permet de limiter de manière importante le risque.With reference to the figure 5 , there is shown a fence 3 according to the invention positioned on a sloping ground by means of vertical posts 2 planted. Unlike the prior art, there are no spaces between the floor S and the fence 3 through which game can circulate. The use of a partially buried auxiliary screen 4 makes it possible to significantly limit the risk.

En pratique, la clôture 1 est tendue au moyen d'une pluralité de poteaux 2 comportant une embase qui est plantée directement dans le sol S, sans nécessiter de plots en béton comme dans l'art antérieur. De manière préférée, le grillage 3 est conditionné en rouleau préalablement à la pose.In practice, the fence 1 is stretched by means of a plurality of posts 2 comprising a base which is planted directly in the ground S, without requiring concrete studs as in the prior art. Preferably, the mesh 3 is packaged in a roll prior to installation.

Lors de la pose, une extrémité latérale du grillage 3 est fixée avec un poteau 2 puis le grillage 3 est déroulé au fur à mesure en maintenant le grillage 3 tendu. De préférence, un dérouleur est utilisé pour cette opération. Des poteaux 2 sont plantés dans le sol S à intervalles réguliers pour maintenir le grillage 3 tendu. Dans cet exemple, le poteau 2 s'étend à travers des mailles M1, M2 du grillage 3 afin de solidariser chaque poteau 2 au grillage 3. De manière alternative, la liaison entre un poteau 2 et le grillage 3 peut être réalisée au moyen d'organes rapportés tels que des liens.During installation, a lateral end of the mesh 3 is fixed with a post 2 then the mesh 3 is unrolled gradually while keeping the mesh 3 taut. Preferably, an unwinder is used for this operation. 2 posts are planted in the soil S at regular intervals to keep the wire mesh 3 taut. In this example, the post 2 extends through the meshes M1, M2 of the grid 3 in order to secure each post 2 to the grid 3. Alternatively, the connection between a post 2 and the grid 3 can be made by means of 'reported organs such as links.

Pour fixer le grillage auxiliaire 4, une tranchée est réalisée de manière préliminaire puis la partie inférieure du grillage auxiliaire 4 est enterrée dans la tranchée. Ensuite, la partie supérieure du grillage auxiliaire 4 est fixée aux deuxièmes mailles M2 de la partie inférieure 3A du grillage 3 selon l'invention par agrafage afin de les rendre solidaires les uns des autres.To fix the auxiliary screen 4, a trench is made in a preliminary manner and then the lower part of the auxiliary screen 4 is buried in the trench. Then, the upper part of the auxiliary mesh 4 is fixed to the second mesh M2 of the lower part 3A of the mesh 3 according to the invention by stapling in order to make them integral with each other.

En pratique, grâce à l'invention, le coût de sécurisation d'une zone avec une clôture de sécurité 1 est réduit d'un facteur 8 à 10, ce qui présente un avantage économique important lorsque la zone à sécuriser est vaste comme cela est le cas dans le domaine ferroviaire.In practice, thanks to the invention, the cost of securing an area with a security fence 1 is reduced by a factor of 8 to 10, which presents a significant economic advantage when the area to be secured is large as is. the case in the railway sector.

Claims (15)

  1. A netting (3) for a safety fence (1), the netting (3) consisting of horizontal steel wires (31) secured to vertical steel wires (32) having a height greater than 1.80m, the vertical steel wires (32) being spaced apart from one another by a same distance (Dv), the netting (3) comprising first meshes (M1) having a height (Dh), defined between two adjacent horizontal steel wires, between 200mm and 203mm, the vertical steel wires (32) being spaced apart from one another by a same distance (Dv) between 49mm and 52mm, characterised in that the horizontal steel wires (31) and vertical steel wires (32) have a diameter between 3.7 and 3.9mm.
  2. The netting (3) according to claim 1, wherein the horizontal steel wires (31) and vertical steel wires (32) have a diameter of 3.8mm.
  3. The netting (3) according to one of claims 1 and 2, wherein the horizontal steel wires (31) and vertical steel wires (32) are of soft steel.
  4. The netting (3) according to one of claims 1 to 3, comprising between 15 and 19 horizontal steel wires (31) when the netting (3) has a height between 2.30m and 2.60m.
  5. The netting (3) according to one of claims 1 to 4, comprising second meshes (M2) having a height (Dh2), defined between two adjacent horizontal steel wires, between 100mm and 103mm.
  6. The netting (3) according to one of claims 1 to 5, only comprising first meshes (M1) having a height (Dh1), defined between two adjacent horizontal steel wires, between 200mm and 203mm, and second meshes (M2) having a height (Dh2), defined between two adjacent horizontal steel wires, between 100mm and 103mm.
  7. The netting (3) according to one of claims 1 to 6, comprising an intermediate part (3B) consisting of a repeat of identical meshing modules (5), each meshing module comprising at least one first mesh (M1) having a height (Dh1), defined between two adjacent horizontal steel wires, between 200mm and 203mm and at least one second mesh (M2) having a height (Dh2), defined between two adjacent horizontal steel wires, between 100mm and 103mm.
  8. The netting (3) according to claim 7, wherein each meshing module (5) consists of two first meshes (M1) and one second mesh (M2).
  9. The netting (3) according to one of claims 1 to 8, wherein the vertical steel wires (31) vertically extend protruding upwardly relative to the horizontal steel wire (32) located most upwards so as to form protective pins (33).
  10. The netting (3) according to one of claims 1 to 9, packaged in a roll.
  11. A safety fence (1), comprising at least one netting (3) according to one of claims 1 to 10 and a plurality of posts (2) tensioning said netting (3), each post (2) comprising a base stuck into the ground (S).
  12. The safety fence (1) according to the preceding claim, comprising an auxiliary netting (4) which is mounted covering partially the netting (3), in particular, its lower part (3A).
  13. The safety fence (1) according to the preceding claim, wherein the auxiliary netting (4) is buried into the ground (S) over a depth at least equal to 50cm.
  14. A method for putting up a safety fence (1) according to one of claims 11 to 13, the method comprising:
    - a step of fastening an end of a netting (3) packaged in a roll,
    - a step of unwinding said netting (3) and
    - a step of sticking posts (2) into the ground (S) and fastening posts (2) to the netting (3) as it is unwound.
  15. A use of a fence according to one of claims 11 to 13, to prevent access to a rail track.
EP18204359.6A 2017-11-10 2018-11-05 Screen and security fence comprising such a screen Active EP3483361B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1760594A FR3073541B1 (en) 2017-11-10 2017-11-10 GRIDING AND SAFETY CLOSURE COMPRISING SUCH A GRID

Publications (2)

Publication Number Publication Date
EP3483361A1 EP3483361A1 (en) 2019-05-15
EP3483361B1 true EP3483361B1 (en) 2021-08-11

Family

ID=61132589

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18204359.6A Active EP3483361B1 (en) 2017-11-10 2018-11-05 Screen and security fence comprising such a screen

Country Status (4)

Country Link
EP (1) EP3483361B1 (en)
ES (1) ES2896523T3 (en)
FR (1) FR3073541B1 (en)
MA (1) MA43610B1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2923779A1 (en) * 2014-03-26 2015-09-30 Van Merksteijn Fences-Netherlands B.V. Fence panel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2650578A1 (en) * 1976-11-04 1978-05-11 Arbed KNOTS
JP3331512B2 (en) * 1995-03-03 2002-10-07 積水樹脂株式会社 Wire mesh Fuens
US20060237704A1 (en) * 2005-04-26 2006-10-26 Michael Rodenburg Fence panel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2923779A1 (en) * 2014-03-26 2015-09-30 Van Merksteijn Fences-Netherlands B.V. Fence panel

Also Published As

Publication number Publication date
MA43610B1 (en) 2019-12-31
FR3073541A1 (en) 2019-05-17
ES2896523T3 (en) 2022-02-24
FR3073541B1 (en) 2019-10-18
EP3483361A1 (en) 2019-05-15
MA43610A1 (en) 2019-05-31

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