EP1422490B1 - Anti-effraction door - Google Patents

Anti-effraction door Download PDF

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Publication number
EP1422490B1
EP1422490B1 EP02025870A EP02025870A EP1422490B1 EP 1422490 B1 EP1422490 B1 EP 1422490B1 EP 02025870 A EP02025870 A EP 02025870A EP 02025870 A EP02025870 A EP 02025870A EP 1422490 B1 EP1422490 B1 EP 1422490B1
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EP
European Patent Office
Prior art keywords
panel
slats
grill
effraction
door according
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EP02025870A
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German (de)
French (fr)
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EP1422490A1 (en
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Hans-Dieter Heinen
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Individual
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Individual
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Priority to ES02025870T priority Critical patent/ES2341536T3/en
Priority to DE60235817T priority patent/DE60235817D1/en
Priority to EP02025870A priority patent/EP1422490B1/en
Priority to AT02025870T priority patent/ATE462951T1/en
Publication of EP1422490A1 publication Critical patent/EP1422490A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00—Armour; Armour plates
    • F41H5/02—Plate construction
    • F41H5/023—Armour plate, or auxiliary armour plate mounted at a distance of the main armour plate, having cavities at its outer impact surface, or holes, for deflecting the projectile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00—Armour; Armour plates
    • F41H5/013—Mounting or securing armour plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00—Armour; Armour plates
    • F41H5/02—Plate construction

Definitions

  • the present invention relates to an anti-burglar door.
  • the hollow charges were primarily developed for projectiles to pierce the armor of military tanks.
  • a hollow charge comprises a metal sleeve filled with an explosive in which is arranged a profiled cavity. This profiled cavity facing the surface of the shield leads to a concentration of the energy of the explosion waves in a very restricted focal area on the target surface. This produces very destructive effects with small amounts of explosive.
  • a hollow charge with 200 g of tolite is perfectly capable of piercing a massive plate of steel with a thickness of 60 mm.
  • hollow charges that include water tubes or cans filled with water to increase the effects.
  • shields For military tanks, shields have been developed to withstand hollow charge projectiles. These include reactive shields containing an explosive that explodes in the jet of gas produced by the explosion of the hollow charge. This counter-explosion disrupts the establishment of this jet of gas and causes an appreciable reduction in pierce power of the hollow charge.
  • reactive armor used on military machines are expensive and their implementation is difficult and dangerous.
  • a protection system shielding plates against hollow charges is also known from the document US 6,311,605 which describes the preamble of claim 1. This document proposes to provide on the armor plate protruding bodies which, when the hollow charge strikes the armor plate, penetrate into the cavity of the hollow charge to hinder the formation of a focused jet.
  • a burglar-proof door In the civil field, a burglar-proof door must absolutely have a continuous outer surface, that is to say a flat or curved surface that does not include projecting elements or cavities.
  • the document FR 503,320 relates to a battlecruiser armor capable of detaching from a hard point of a projectile a soft metal cap protecting the hard point against breakage at the moment of impact.
  • the proposed solution consists essentially of having a grid or similar coating outside the armor plate which twists, breaks or pulls the soft metal cap from the projectile.
  • the document GB 577.785 relates to a bulletproof armor for vehicles.
  • a proposed solution consists in providing on a base plate, a cellular structure which is filled with rubber blocks and which is then covered with a cover plate. The cellular structure prevents an expansion of the rubber block struck by a bullet, which apparently reduces the effect of such a bullet.
  • the document DE 197 35 594 Its purpose is the protection of armored vehicles against the explosion of mines.
  • the proposed solution consists in fixing under the vehicle a protective screen comprising a horizontal support plate and a grid supported by this support plate.
  • This grid consists of "long blades” and “short blades” perpendicular to the support plate.
  • the support plate consists, in a first embodiment, of a ductile material having a high elongation of rupture.
  • the support plate is a dimensionally stable plate preferably comprising a glass fiber reinforced plastic.
  • this support plate introduces energy, resulting from an explosion of a mine under the vehicle, into the grid blades, which then absorb the explosion energy in the form of deformation energy.
  • "Short blades" are supposed to provide deformation spaces for "long blades”.
  • the document US4,404,889 relates to a composite armor for vehicles, intended to protect the occupants of these vehicles mainly against mine explosions, but apparently also against hollow charges, projectiles and irradiations.
  • This composite shield comprises at least two intermediate layers sandwiched between two steel plates. At least one of these intermediate layers is made of balsa wood. These intermediate layers are intended to absorb kinetic energy.
  • the object of the present invention is to provide an anti-burglar door comprising a door panel which has a continuous outer surface and which is adapted to withstand more burglary attempts using a hollow charge fixed on this surface continues. According to the invention, this object is achieved by an anti-tampering door according to claim 1.
  • An anti-burglar door comprises a door panel comprising a high mechanical strength shielding panel, a grid fixed on a first face of this shielding panel, this grid being composed of slats perpendicular to this first face, and a low resistance dressing panel.
  • This covers the fence and forms the continuous outer surface exposed to an attempted break-in.
  • Continuous surface means a flat or curved surface that does not include projecting elements or cavities). Due to a small thickness and / or low mechanical strength of the material constituting it, the covering panel has little resistance to the explosion of a hollow charge fixed on its outer surface. It follows that the trim panel yields without deforming the underlying grid, this especially as the mesh also has good transverse rigidity.
  • the presence of the mesh implies that the explosion waves must pass through a layer of air before meeting the first rigid panel which forms an obstacle to the development of the explosion waves, in this case the shielding panel.
  • the "air cushion" between the blast furnace and the exposed surface of the shielding panel dampens and dissipates the blast waves, reducing the focused piercing power of the hollow charge.
  • the slats perpendicular to the first face of the shielding panel disturb the establishment of a highly focused gas jet, which further reduces the efficiency of the hollow charge.
  • the wire mesh improves the deformation resistance of the shield panel, without substantially increasing the weight thereof.
  • the trim panel hides the existence and geometry of the fence to an attacker.
  • This protection system is significantly improved, if a gap is arranged between the mesh and the first face of the shielding panel.
  • This empty space is intended to be used for the evacuation of explosive gases between the mesh and the first face of the shielding panel. It allows expansion of the gases, which results in a decrease in the explosion pressure exerted on the shielding panel. It is also believed that the explosive gas streams form in this void space a "gas pad" which dampens the successive shock waves produced by the explosion of the hollow charge.
  • the grating is composed of first slats which extend in a first direction and second slats which extend in a second direction.
  • the first battens are in direct contact with the first face of the armor panel.
  • the second battens are instead spaced apart from the first face of the armor panel, so as to define channels between the lower edges of the second battens and the first face of the armor panel. These channels then constitute an empty space for the evacuation of explosive gas between the mesh and the first face of the shielding panel.
  • all the lath slats are spaced from the first face of the shielding panel, so as to form a single-piece void space for the lateral evacuation of explosion gas between the inner face mesh and the first side of the shielding panel.
  • the distance between the first face of the shielding panel and the outer face of the gate is preferably greater than 10 mm and advantageously of the order of 20 to 50 mm.
  • the slats advantageously have a thickness of the order of 1 to 3 mm and a height of the order of 10 to 40 mm. They can be tapered to have the smallest thickness on the side of the outer face of the grid. Such thin slats act as a knife on the explosion jet. It disrupts the establishment of a highly focused gas jet without substantially deforming toward the shield panel.
  • the mesh is advantageously formed of slats which intersect to form cells of a smaller section than the opening section of the hollow charge. Cells of a section of the order of 2 to 26 cm 2 are generally recommended. Two battens that intersect are also advantageously connected to each other at their crossing point, which increases their strength and makes it more difficult to create an opening in the mesh to apply a hollow charge directly to the first face of the armor panel .
  • the screen is mounted in a frame which is attached to the first face of the shield panel.
  • This frame then advantageously comprises a wide peripheral fastening flange welded or glued to the first face of the shielding panel. It will be appreciated that a grid mounted this way will be, because of the time required for disassembly, an obstacle difficult to overcome by an attacker.
  • Fig. 1 & 2 10 denotes an outer metal shield panel for an anti-tamper door.
  • Arrow 12 indicates a face surface of the shield panel 10 which is exposed to a break-in.
  • This face 12 of the shielding panel 10 is covered with a grid 14, 14 '.
  • the outer surface of the mesh 14, 14 ' is coated with a covering panel 26, for example a thin sheet (for example less than 0.8 mm) or a thin plate of wood or plastic, which forms a continuous outer surface, identified by the arrow 15. Due to a small thickness and / or low mechanical strength of the material constituting it, the trim panel has little resistance to the explosion of a hollow charge fixed on its outer surface.
  • This grid 14 ' is mounted in a frame 28 which maintains the inner face 30 of the grid 14' at a distance from the first face 12 of the shielding panel 10.
  • the frame 28 is advantageously a peripheral frame which surrounds the edge of the grid 14'. It comprises a wide fastening flange 34, which may be discontinuous and which is fixed (advantageously bonded or welded) to the first face 12 of the shielding panel 10.
  • the reference 36 designates an intermediate support of the mesh 14 'which is fixed on the first face 12 of the shielding panel 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Building Environments (AREA)
  • Securing Of Glass Panes Or The Like (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Refrigerator Housings (AREA)
  • Special Wing (AREA)

Abstract

The break in resistant panel for a door has an armored panel (10) and a grill (14) on one face (12) of the panel, formed of slats (16,18) perpendicular to the face of the panel. A cover panel (26) of weaker material covers the grill and forms a continuous surface (15) exposed to a break in attempt. The distance between the panel face and the grill is at least ten millimeters. The slats can have a thickness of between one and three millimeters.

Description

Domaine technique auquel se rapporte l'inventionTechnical field to which the invention relates

La présente invention concerne une porte anti-effraction.The present invention relates to an anti-burglar door.

Etat de la techniqueState of the art

On connaît aujourd'hui de nombreuses formes de réalisation de panneaux blindés pour renforcer notamment des portes ou cloisons anti-effraction. Les réalisations les plus récentes atteignent des temps de résistance très élevés lors tentatives d'enfoncement, de tentatives de perçage avec des outils coupants ou avec un chalumeau de découpage. Cependant, les forces de l'ordre craignent actuellement qu'il soit possible de percer tous les types de panneaux anti-effraction actuellement sur le marché assez facilement à l'aide de charges creuses.Numerous embodiments of armored panels are known today, in particular to strengthen burglar-proof doors or partitions. The most recent achievements achieve very high resistance times during penetration attempts, drilling attempts with cutting tools or with a cutting torch. However, law enforcement officials are currently concerned that it is possible to drill all types of burglar alarms currently on the market quite easily using hollow charges.

Les charges creuses ont avant tout été développées pour des projectiles devant percer le blindage de chars militaires. Une telle charge creuse comprend une douille métallique remplie d'un explosif dans lequel est aménagée une cavité profilée. Cette cavité profilée tournée vers la surface du blindage conduit à une concentration de l'énergie des ondes d'explosion en une zone focale très restreinte sur la surface cible. On obtient ainsi des effets très destructeurs avec de faibles quantités d'explosif. Il est par exemple connu qu'une charge creuse avec 200 g de tolite est parfaitement apte à percer une plaque massive d'acier d'une épaisseur de 60 mm. Il existe aussi des charges creuses qui comprennent des tubes à eau ou des bidons remplis d'eau pour en augmenter les effets.The hollow charges were primarily developed for projectiles to pierce the armor of military tanks. Such a hollow charge comprises a metal sleeve filled with an explosive in which is arranged a profiled cavity. This profiled cavity facing the surface of the shield leads to a concentration of the energy of the explosion waves in a very restricted focal area on the target surface. This produces very destructive effects with small amounts of explosive. It is known, for example, that a hollow charge with 200 g of tolite is perfectly capable of piercing a massive plate of steel with a thickness of 60 mm. There are also hollow charges that include water tubes or cans filled with water to increase the effects.

Pour les chars militaires, on a développé des blindages aptes à résister à des projectiles à charge creuse. Il s'agit notamment de blindages réactifs contenant un explosif qui explose dans le jet de gaz produit par l'explosion de la charge creuse. Cette contre-explosion perturbe l'établissement de ce jet de gaz et entraîne une réduction appréciable du pouvoir de percement de la charge creuse. Cependant, les blindages réactifs utilisés sur les engins militaires sont chers et leur mise en oeuvre est difficile et dangereuse.For military tanks, shields have been developed to withstand hollow charge projectiles. These include reactive shields containing an explosive that explodes in the jet of gas produced by the explosion of the hollow charge. This counter-explosion disrupts the establishment of this jet of gas and causes an appreciable reduction in pierce power of the hollow charge. However, the reactive armor used on military machines are expensive and their implementation is difficult and dangerous.

Dans le document FR 1,103,549 , on décrit aussi un système de protection passif du blindage de chars contre des projectiles équipés de charges creuses. On propose de fixer sur une plaque de blindage une série de plaquettes ou lamelles perpendiculairement à la face externe du blindage et parallèlement les unes aux autres. La hauteur de ces plaquettes est supérieure est supérieure à la distance qui sépare l'extrémité antérieure d'un projectile à charge creuse de sa partie de plus grand diamètre. L'intervalle entre les plaquettes est inférieur à ce plus grand diamètre. Selon le document FR 1,103,549 , le but de ces plaquettes est de provoquer une détérioration de la tête du projectile à charge creuse par une rencontre de cette tête avec au moins une de ces plaquettes. On suppose que cette détérioration de la tête entraîne alors que la combustion de la charge creuse est sans effet lors de sa mise à feu.In the document FR 1,103,549 a passive shielding system of tanks against projectiles with hollow charges is also described. It is proposed to fix on a shielding plate a series of plates or strips perpendicular to the outer face of the shield and parallel to each other. The height of these pads is greater than the distance between the front end of a hollow charge projectile and its larger diameter portion. The gap between the platelets is smaller than this larger diameter. According to the document FR 1,103,549 the purpose of these platelets is to cause deterioration of the hollow charge projectile head by a meeting of this head with at least one of these platelets. It is assumed that this deterioration of the head causes whereas the combustion of the hollow charge has no effect when it is fired.

Un blindage passif du type décrit dans le document FR 1,103,549 ne semble a priori pas adapté pour protéger un panneau d'une porte anti-effraction contre une tentative de perçage à l'aide d'une charge creuse. En effet, le criminel ne va probablement pas utiliser un projectile équipé d'une charge creuse. Il va plutôt fixer la charge creuse sur la surface exposée du panneau de porte et la faire exploser ensuite. Or, du document FR 1,103,549 il faut conclure que le système proposé est seulement efficace si les lamelles sont apte à déformer la tête de la charge creuse avant combustion de la charge creuse. Une telle déformation n'a cependant pas lieu si la charge creuse est directement fixée sur la surface exposée du panneau anti-effraction.Passive shielding of the type described in the document FR 1,103,549 does not seem a priori not suitable to protect a panel of a burglar-proof door against an attempt to drill using a hollow charge. Indeed, the criminal is probably not going to use a projectile equipped with a hollow charge. Instead, it will fix the hollow charge on the exposed surface of the door panel and then explode. From the document FR 1,103,549 it must be concluded that the proposed system is only effective if the slats are able to deform the head of the hollow charge before combustion of the hollow charge. Such deformation does not occur, however, if the hollow charge is directly attached to the exposed surface of the burglar-proof panel.

Un système de protection de plaques de blindage contre des charges creuses est également connu du document US 6,311,605 qui décrit le préambule de la revendication 1. Ce document propose de prévoir sur la plaque de blindage des corps en saillie qui, lorsque la charge creuse heurte la plaque de blindage, pénètrent dans la cavité de la charge creuse pour gêner la formation d'un jet focalisé.A protection system shielding plates against hollow charges is also known from the document US 6,311,605 which describes the preamble of claim 1. This document proposes to provide on the armor plate protruding bodies which, when the hollow charge strikes the armor plate, penetrate into the cavity of the hollow charge to hinder the formation of a focused jet.

Or, si le point de vue esthétique est parfaitement négligeable pour le domaine militaire, tel n'est certainement pas le cas pour les portes anti-effraction dans des constructions civiles. Dans le domaine civil, une porte anti-effraction doit absolument avoir une surface extérieure continue, c'est-à-dire une surface plane ou courbe ne comprenant pas d'éléments saillants ou de cavités.However, if the aesthetic point of view is perfectly negligible for the military field, this is certainly not the case for the burglar-proof doors in civil constructions. In the civil field, a burglar-proof door must absolutely have a continuous outer surface, that is to say a flat or curved surface that does not include projecting elements or cavities.

Reste à noter que l'état de la technique comprend de nombreux documents qui concernent la protection de véhicules ou vaisseaux militaires, soit contre des projectiles ou balles, soit contre des explosions de mines.It should be noted that the state of the art includes many documents concerning the protection of military vehicles or vessels, either against projectiles or bullets, or against mine explosions.

Le document FR 503,320 a pour objet un blindage pour vaisseaux de guerre capable de détacher d'une pointe dure d'un projectile, un capuchon en métal tendre protégeant cette pointe dure contre une cassure au moment de l'impact. La solution proposée consiste essentiellement dans le fait de disposer extérieurement à la plaque de blindage une grille ou un revêtement similaire qui tord, rompt ou arrache le capuchon en métal tendre du projectile.The document FR 503,320 relates to a battlecruiser armor capable of detaching from a hard point of a projectile a soft metal cap protecting the hard point against breakage at the moment of impact. The proposed solution consists essentially of having a grid or similar coating outside the armor plate which twists, breaks or pulls the soft metal cap from the projectile.

Le document GB 577,785 a pour objet un blindage pare-balles pour véhicules. Une solution proposée consiste dans le fait de prévoir sur une plaque de base, une structure cellulaire dont on remplit les cellules à l'aide de blocs en caoutchouc et qui est ensuite recouverte d'une plaque d'habillage. La structure cellulaire empêche une expansion du bloc en caoutchouc heurté par une balle, ce qui diminuerait apparemment l'effet d'une telle balle.The document GB 577.785 relates to a bulletproof armor for vehicles. A proposed solution consists in providing on a base plate, a cellular structure which is filled with rubber blocks and which is then covered with a cover plate. The cellular structure prevents an expansion of the rubber block struck by a bullet, which apparently reduces the effect of such a bullet.

Le document DE 197 35 594 a pour objet la protection de véhicules blindés contre l'explosion de mines. La solution proposée consiste à fixer sous le véhicule un écran protecteur comprenant une plaque de support horizontale et un grillage supporté par cette plaque de support. Ce grillage est constitué de «lames longues» et de «lames courtes» perpendiculaires à la plaque de support. La plaque de support consiste, dans une première exécution, en un matériau ductile ayant un allongement de rupture élevé. Dans une deuxième exécution, la plaque de support est une plaque indéformable comprenant de préférence un plastique renforcé de fibres de verre. Selon l'enseignement du document DE 197 35 594 , cette plaque de support introduit l'énergie, résultant d'une explosion d'une mine sous le véhicule, dans les lames du grillage, qui absorbent alors l'énergie d'explosion sous forme d'énergie de déformation. Les «lames courtes» sont supposées procurer des espaces de déformation pour les «lames longues».The document DE 197 35 594 Its purpose is the protection of armored vehicles against the explosion of mines. The proposed solution consists in fixing under the vehicle a protective screen comprising a horizontal support plate and a grid supported by this support plate. This grid consists of "long blades" and "short blades" perpendicular to the support plate. The support plate consists, in a first embodiment, of a ductile material having a high elongation of rupture. In a second embodiment, the support plate is a dimensionally stable plate preferably comprising a glass fiber reinforced plastic. According to the teaching of document DE 197 35 594 , this support plate introduces energy, resulting from an explosion of a mine under the vehicle, into the grid blades, which then absorb the explosion energy in the form of deformation energy. "Short blades" are supposed to provide deformation spaces for "long blades".

Le document US 4,404,889 concerne un blindage composite pour des véhicules, visant à protéger les occupants de ces véhicules principalement contre des explosions de mines, mais apparemment aussi contre des charges creuses, des projectiles et des irradiations. Ce blindage composite comprend au moins deux couches intermédiaires en sandwich entre deux plaques d'acier. Au moins une de ces couches intermédiaires est constituée de bois de balsa. Ces couches intermédiaires ont comme but d'absorber l'énergie cinétique.The document US4,404,889 relates to a composite armor for vehicles, intended to protect the occupants of these vehicles mainly against mine explosions, but apparently also against hollow charges, projectiles and irradiations. This composite shield comprises at least two intermediate layers sandwiched between two steel plates. At least one of these intermediate layers is made of balsa wood. These intermediate layers are intended to absorb kinetic energy.

Le document US 5,847,308 vise le blindage du toit d'un véhicule militaire contre des bombes à charges multiples. Il propose la formation de piles constituées de tuiles en verre collées sur des tuiles en céramique et enfermées dans une boîte métallique fixée sur une plaque de base.The document US 5,847,308 is aimed at shielding the roof of a military vehicle against multiple-charge bombs. He proposes the formation of piles consisting of glass tiles glued on ceramic tiles and enclosed in a metal box fixed on a base plate.

Objet de l'inventionObject of the invention

L'objet de la présente invention est de proposer une porte anti-effraction comprenant un panneau de porte qui présente une surface extérieure continue et qui est apte à mieux résister à des tentatives d'effraction à l'aide d'une charge creuse fixée sur cette surface continue. Conformément à l'invention, cet objectif est atteint par une porte anti-effraction selon la revendication 1.The object of the present invention is to provide an anti-burglar door comprising a door panel which has a continuous outer surface and which is adapted to withstand more burglary attempts using a hollow charge fixed on this surface continues. According to the invention, this object is achieved by an anti-tampering door according to claim 1.

Exposé de l'inventionPresentation of the invention

Une porte anti-effraction selon la présente invention comprend un panneau de porte comprenant un panneau de blindage à résistance mécanique élevée, un grillage fixé sur une première face de ce panneau de blindage, ce grillage étant composé de lattes perpendiculaires à cette première face, et un panneau d'habillage de faible résistance. Ce dernier recouvre le grillage et forme la surface extérieure continue exposée à une tentative d'effraction. (Par "surface continue" il faut entendre une surface plane ou courbe qui ne comprend pas d'éléments saillants ou de cavités). Grâce à une faible épaisseur et/ou une faible résistance mécanique du matériau qui le constitue, le panneau d'habillage ne présente guère de résistance à l'explosion d'une charge creuse fixée sur sa surface extérieure. Il s'ensuit que le panneau d'habillage cède sans déformer le grillage sous-jacent, ceci d'autant plus que le grillage présente par ailleurs une bonne rigidité transversale. La présence du grillage implique ensuite que les ondes d'explosion doivent traverser une couche d'air avant de rencontrer le premier panneau rigide qui forme obstacle au développement des ondes d'explosions, en l'occurrence le panneau de blindage. Le "coussin d'air" entre le foyer de l'explosion et la surface exposée du panneau de blindage amortit et dissipe les ondes d'explosion, ce qui réduit le pouvoir de percement focalisé de la charge creuse. De plus, les lattes perpendiculaires à la première face du panneau de blindage perturbent l'établissement d'un jet de gaz fortement focalisé, ce qui réduit encore davantage l'efficacité de la charge creuse. Il sera en outre apprécié que le grillage améliore la résistance à la déformation du panneau de blindage, sans sensiblement en augmenter le poids. Enfin, le panneau d'habillage cache l'existence et la géométrie du grillage à un attaquant. L'efficacité de ce système de protection est sensiblement amélioré, si un espace vide est aménagé entre le grillage et la première face du panneau de blindage. Cet espace vide a comme but de servir à l'évacuation de gaz d'explosion entre le grillage et la première face du panneau de blindage. Il permet une expansion des gaz, ce qui entraîne une diminution de la pression d'explosion exercée sur le panneau de blindage. On pense aussi que les flux de gaz d'explosion forment dans cet espace vide un "coussinet de gaz" qui amortit les ondes de choc successives produites par l'explosion de la charge creuse.An anti-burglar door according to the present invention comprises a door panel comprising a high mechanical strength shielding panel, a grid fixed on a first face of this shielding panel, this grid being composed of slats perpendicular to this first face, and a low resistance dressing panel. This covers the fence and forms the continuous outer surface exposed to an attempted break-in. ("Continuous surface" means a flat or curved surface that does not include projecting elements or cavities). Due to a small thickness and / or low mechanical strength of the material constituting it, the covering panel has little resistance to the explosion of a hollow charge fixed on its outer surface. It follows that the trim panel yields without deforming the underlying grid, this especially as the mesh also has good transverse rigidity. The presence of the mesh then implies that the explosion waves must pass through a layer of air before meeting the first rigid panel which forms an obstacle to the development of the explosion waves, in this case the shielding panel. The "air cushion" between the blast furnace and the exposed surface of the shielding panel dampens and dissipates the blast waves, reducing the focused piercing power of the hollow charge. In addition, the slats perpendicular to the first face of the shielding panel disturb the establishment of a highly focused gas jet, which further reduces the efficiency of the hollow charge. It will further be appreciated that the wire mesh improves the deformation resistance of the shield panel, without substantially increasing the weight thereof. Finally, the trim panel hides the existence and geometry of the fence to an attacker. The effectiveness of this protection system is significantly improved, if a gap is arranged between the mesh and the first face of the shielding panel. This empty space is intended to be used for the evacuation of explosive gases between the mesh and the first face of the shielding panel. It allows expansion of the gases, which results in a decrease in the explosion pressure exerted on the shielding panel. It is also believed that the explosive gas streams form in this void space a "gas pad" which dampens the successive shock waves produced by the explosion of the hollow charge.

Dans une exécution particulièrement simple, le grillage est composé de premières lattes qui s'étendent dans une première direction et de deuxièmes lattes qui s'étendent dans une deuxième direction. Les premières lattes sont en contact direct avec la première face du panneau de blindage. Les deuxièmes lattes sont par contre espacées de la première face du panneau de blindage, de façon à définir des canaux entre les bords inférieurs des deuxièmes lattes et la première face du panneau de blindage. Ces canaux constituent alors un espace vide servant à l'évacuation de gaz d'explosion entre le grillage et la première face du panneau de blindage.In a particularly simple execution, the grating is composed of first slats which extend in a first direction and second slats which extend in a second direction. The first battens are in direct contact with the first face of the armor panel. The second battens are instead spaced apart from the first face of the armor panel, so as to define channels between the lower edges of the second battens and the first face of the armor panel. These channels then constitute an empty space for the evacuation of explosive gas between the mesh and the first face of the shielding panel.

Dans une variante d'exécution, toutes les lattes du grillage sont espacées de la première face du panneau de blindage, de façon à former un espace vide d'un seul tenant servant à l'évacuation latérale de gaz d'explosion entre la face intérieure du grillage et la première face du panneau de blindage.In an alternative embodiment, all the lath slats are spaced from the first face of the shielding panel, so as to form a single-piece void space for the lateral evacuation of explosion gas between the inner face mesh and the first side of the shielding panel.

La distance entre la première face du panneau de blindage et la face extérieure de la grille est de préférence supérieure à 10 mm et avantageusement de l'ordre de 20 à 50 mm. Les lattes ont avantageusement une épaisseur de l'ordre de 1 à 3 mm et une hauteur de l'ordre de 10 à 40 mm. Elles peuvent être effilées de façon à présenter la plus faible épaisseur du côté de la face extérieure de la grille. De telles lattes minces agissent comme un couteau sur le jet d'explosion. Elle perturbent l'établissement d'un jet de gaz fortement focalisé sans se déformer de façon substantielle en direction du panneau de blindage.The distance between the first face of the shielding panel and the outer face of the gate is preferably greater than 10 mm and advantageously of the order of 20 to 50 mm. The slats advantageously have a thickness of the order of 1 to 3 mm and a height of the order of 10 to 40 mm. They can be tapered to have the smallest thickness on the side of the outer face of the grid. Such thin slats act as a knife on the explosion jet. It disrupts the establishment of a highly focused gas jet without substantially deforming toward the shield panel.

Le grillage est avantageusement formé de lattes qui se croisent pour former des cellules d'une section plus petite que la section d'ouverture de la charge creuse. Des cellules d'une section de l'ordre de 2 à 26 cm2 sont généralement recommandées. Deux lattes qui se croisent sont par ailleurs avantageusement reliées entre elles à leur point de croisement, ce qui augmente leur résistance et rend plus difficile la création d'une ouverture dans le grillage pour appliquer une charge creuse directement sur la première face du panneau de blindage.The mesh is advantageously formed of slats which intersect to form cells of a smaller section than the opening section of the hollow charge. Cells of a section of the order of 2 to 26 cm 2 are generally recommended. Two battens that intersect are also advantageously connected to each other at their crossing point, which increases their strength and makes it more difficult to create an opening in the mesh to apply a hollow charge directly to the first face of the armor panel .

De préférence, le grillage est monté dans un cadre qui est fixé sur la première face du panneau de blindage. Ce cadre comprend alors avantageusement une large bride de fixation périphérique soudée ou collée sur la première face du panneau de blindage. Il sera apprécié qu'un grillage monté de cette façon sera, du fait du temps nécessaire à son démontage, un obstacle difficile à surmonter par un attaquant.Preferably, the screen is mounted in a frame which is attached to the first face of the shield panel. This frame then advantageously comprises a wide peripheral fastening flange welded or glued to the first face of the shielding panel. It will be appreciated that a grid mounted this way will be, because of the time required for disassembly, an obstacle difficult to overcome by an attacker.

Brève description des FiguresBrief description of the Figures

D'autres particularités et caractéristiques de l'invention ressortiront de la description détaillée de quelques modes de réalisation avantageux présentés ci-dessous, à titre d'illustration, en se référant aux dessins annexés. Ceux-ci montrent:

Fig.1:
une coupe transversale à travers une première exécution d'un panneau pour une porte anti-effraction selon l'invention;
Fig.2:
une coupe transversale à travers une deuxième exécution d'un panneau pour une porte anti-effraction selon l'invention.
Other features and characteristics of the invention will become apparent from the detailed description of some advantageous embodiments presented below, by way of illustration, with reference to the accompanying drawings. These show:
Fig.1:
a cross-section through a first embodiment of a panel for an anti-burglary door according to the invention;
Fig.2:
a cross section through a second embodiment of a panel for an anti-burglar door according to the invention.

Description détaillée de quelques modes de réalisation avantageux de l'inventionDetailed description of some advantageous embodiments of the invention

Sur les figures, les mêmes références désignent des éléments identiques ou similaires.In the figures, the same references designate identical or similar elements.

Dans les Fig. 1 & 2, la référence 10 désigne un panneau de blindage métallique extérieur pour une porte anti-effraction. La flèche 12 indique une surface face du panneau de blindage 10 qui est exposée à une attaque par effraction. Cette face 12 du panneau de blindage 10 est recouverte d'un grillage 14, 14'. La surface externe du grillage 14, 14' est revêtue d'un panneau d'habillage 26, par exemple une tôle de faible épaisseur (par exemple de moins de 0,8 mm) ou une plaque mince en bois ou en plastique, qui forme une surface extérieure continue, identifiée par la flèche 15. Grâce à une faible épaisseur et/ou une faible résistance mécanique du matériau qui le constitue, le panneau d'habillage ne présente guère de résistance à l'explosion d'une charge creuse fixée sur sa surface extérieure.In the Fig. 1 & 2 10 denotes an outer metal shield panel for an anti-tamper door. Arrow 12 indicates a face surface of the shield panel 10 which is exposed to a break-in. This face 12 of the shielding panel 10 is covered with a grid 14, 14 '. The outer surface of the mesh 14, 14 'is coated with a covering panel 26, for example a thin sheet (for example less than 0.8 mm) or a thin plate of wood or plastic, which forms a continuous outer surface, identified by the arrow 15. Due to a small thickness and / or low mechanical strength of the material constituting it, the trim panel has little resistance to the explosion of a hollow charge fixed on its outer surface.

Le grillage 14 de la Fig. 1 est un grillage de type caillebotis composé d'une multitude de premières lattes 16i (i=1, 2, 3, 4, ...), qui sont perpendiculaires au plan du dessin et perpendiculaires à la face 12 du panneau de blindage 10, et d'une multitude de deuxièmes lattes 18, (i=1, ...), qui sont parallèles au plan du dessin et perpendiculaires à la face 12 du panneau de blindage 10. Dans l'exemple illustré, les premières lattes 16i (i=1, 2, 3, 4, ...) et les deuxièmes lattes 18i (i=1, ...) se croisent ainsi à angle droit et sont reliées à leur points de croisement. Les bords inférieurs 20i (i=1, 2, 3, 4, ...) des premières lattes 16i (i=1, 2, 3, 4, ...) sont en contact direct avec la face 12 du panneau de blindage 10 et sont fixées à cette dernière par des points de soudage. Les deuxièmes lattes 18i (i=1, ...) ont une hauteur plus faible que les premières lattes 16i (i=1, 2, 3, 4, ...), et leur bord inférieur 22i (i=1, ...) est espacé de la première face 12 du panneau de blindage 10. De cette façon sont définis des canaux 24i (i=1, 2, 3...), qui sont délimités latéralement par les premières lattes 16i (i=1, 2, 3, 4, ...) et qui s'étendent entre les bords inférieurs 22i (i=1, ...) des deuxièmes lattes 18i (i=1, ...) et la première face 12 du panneau de blindage.The grill 14 of the Fig. 1 is a grating type grating composed of a multitude of first slats 16 i (i = 1, 2, 3, 4, ...), which are perpendicular to the plane of the drawing and perpendicular to the face 12 of the shielding panel 10 and a multitude of second slats 18, (i = 1, ...), which are parallel to the plane of the drawing and perpendicular to the face 12 of the shielding panel 10. In the example illustrated, the first slats 16 i (i = 1, 2, 3, 4, ...) and the second slats 18 i (i = 1, ...) intersect at right angles and are connected to their points of intersection. The lower edges 20 i (i = 1, 2, 3, 4, ...) of the first slats 16 i (i = 1, 2, 3, 4, ...) are in direct contact with the face 12 of the panel 10 and are attached thereto by welding points. The second slats 18 i (i = 1, ...) have a lower height than the first slats 16 i (i = 1, 2, 3, 4, ...), and their lower edge 22 i (i = 1, ...) is spaced from the first face 12 of the shielding panel 10. In this way are defined channels 24 i (i = 1, 2, 3 ...), which are delimited laterally by the first slats 16 i (i = 1, 2, 3, 4, ...) and which extend between the lower edges 22 i (i = 1, ...) of the second slats 18 i (i = 1, ...) and the first face 12 of the shielding panel.

Le grillage 14' de la Fig. 2 se distingue du grillage 14 de la Fig. 1 essentiellement par le fait que les premières lattes 16'i (i=1, 2, 3, 4, ...) et les deuxièmes lattes 18'i (i=1, ...) ont la même hauteur. Ce grillage 14' est monté dans un cadre 28 qui maintient la face intérieure 30 du grillage 14' à une certaine distance de la première face 12 du panneau de blindage 10. En d'autres termes, toutes les lattes 16'i (i=1, 2, 3, 4, ...) et 18'i (i=1, ...) du grillage 14' sont espacées de la première face 12 du panneau de blindage 10 et il subsiste un espace vide 32 d'un seul tenant entre la face intérieure 30 du grillage 14' et la première face 12 du panneau de blindage 10. Reste à noter que le cadre 28 est avantageusement un cadre périphérique qui entoure le bord du grillage 14'. Il comprend une large bride de fixation 34, qui peut être discontinue et qui est fixée (avantageusement collée ou soudée) sur la première face 12 du panneau de blindage 10. La référence 36 désigne un support intermédiaire du grillage 14' qui est fixé sur la première face 12 du panneau de blindage 10.The grill 14 'of the Fig. 2 is distinguished from the grill 14 of the Fig. 1 essentially by the fact that the first slats 16 ' i (i = 1, 2, 3, 4, ...) and the second slats 18' i (i = 1, ...) have the same height. This grid 14 'is mounted in a frame 28 which maintains the inner face 30 of the grid 14' at a distance from the first face 12 of the shielding panel 10. In other words, all the slats 16 ' i (i = 1, 2, 3, 4, ...) and 18 ' i (i = 1, ...) of the grid 14' are spaced apart from the first face 12 of the shielding panel 10 and there remains an empty space 32 of a single piece between the inner face 30 of the grid 14 'and the first face 12 of the shielding panel 10. It should be noted that the frame 28 is advantageously a peripheral frame which surrounds the edge of the grid 14'. It comprises a wide fastening flange 34, which may be discontinuous and which is fixed (advantageously bonded or welded) to the first face 12 of the shielding panel 10. The reference 36 designates an intermediate support of the mesh 14 'which is fixed on the first face 12 of the shielding panel 10.

En ce qui concerne le dimensionnement, on notera que:

  • la distance "d" entre la première face 12 du panneau 10 et la face extérieure de la grille de préférence supérieure à 10 mm et avantageusement de l'ordre de 20 à 50 mm (plus cette distance est grande, plus la grille est efficace, mais plus le panneau est encombrant);
  • l'épaisseur "e" des lattes est de l'ordre 1 à 2 mm et leur hauteur "h" est comprise entre 10 et 40 mm;
  • la section "S" des mailles du grillage 14, 14' est de l'ordre de 2 à 26 cm2 (comme déjà mentionné, cette section doit être inférieure à la section de l'ouverture frontale de la charge creuse).
With regard to sizing, note that:
  • the distance "d" between the first face 12 of the panel 10 and the outer face of the gate preferably greater than 10 mm and advantageously of the order of 20 to 50 mm (the greater this distance, the more effective the grid, but the more bulky the panel);
  • the thickness "e" of the slats is of the order 1 to 2 mm and their height "h" is between 10 and 40 mm;
  • the section "S" of the grid meshes 14, 14 'is of the order of 2 to 26 cm 2 (as already mentioned, this section must be less than the section of the front opening of the hollow charge).

Claims (11)

  1. Anti-effraction door comprising a door panel with a continuous surface (15) exposed to a break-in attempt with the help of a shaped-charge cone applied onto this surface, said panel comprising
    a highly mechanically resistant armoured panel (10) with a first side (12);
    characterised by:
    a grill (14, 14') fixed on said first side (12) of said armoured panel (10), said grill (14, 14') being formed from slats (16, 18) (16', 18') perpendicular to said first side (12) of said armoured panel (10);
    a weakly resistant cover panel (26) covering said grill (14, 14') and forming said continuous surface (15) exposed to a break-in attempt, at the moment of the explosion of the shaped-charge cone, said cover panel (26) yielding without deforming the underlying grill; and
    an empty space (24, 32) created between said grill (14, 14') and said first side (12) of said armoured panel (10) such that the gas resulting from the explosion between said grill (14, 14') and said first side of said armoured panel (10) is evacuated and forms a cushion of gas in said empty space (24, 32) which amortises the shock waves produced by the explosion of the shaped-charge cone
  2. Anti-effraction door according to claim 1 wherein said grill (14) is made up of first slats (16) that extend in a first direction and of second slats (18) that extend in a second direction, said first slats (16) being in direct contact with said first side (12) of said armoured panel (10), and said second slats (18) being separated from said first side (12) of said armoured panel (10) such that channels (24) are defined between the lower edges (22) of said second slats (18) and said first side (12) of said armoured panel (10), these channels (24) forming an empty space that facilitates the evacuation of the gas from the explosion between said grill (14) and said first side (12) of said armoured panel (10)
  3. Anti-effraction door according to claim 1 wherein all the slats (16', 18') of said grill (14') are separated from said first side (12) of said armoured panel (10) so as to form said empty space (32) that facilitates the lateral evacuation of the gas resulting from the explosion between the interior side of said grill (30) and said first side (12) of said armoured panel (10)
  4. Anti-effraction door according to any one of claims 1 to 3 wherein the distance between said first side (12) of said armoured panel (10) and the external side of said grill (14, 14') is at least 10 mm
  5. Anti-effraction door according to any one of claims 1 to 4 wherein the thickness of said slats (16, 18, 16', 18') is of the order of 1 to 3 mm
  6. Anti-effraction door according to any one of claims 1 to 5 wherein said slats are tapered and have the smallest thickness next to the external side of said grill
  7. Anti-effraction door according to any one of claims 1 to 6 wherein the height of said slats (16, 18, 16', 18') is between 10 and 40 mm.
  8. Anti-effraction door according to any one of claims 1 to 7 wherein said slats (16, 18, 16', 18') cross over each other to form cells having a section of 2 to 26 cm2
  9. Anti-effraction door according to any one of claims 1 to 8 wherein said slats (16, 18, 16', 18') cross over each other to form cells and are linked to each other at the crossing paints.
  10. Anti-effraction door according to any one of claims 1 to 9 wherein said grill (14') is mounted in a frame (28) that is fixed on said first side (12) of said armoured panel (10)
  11. Anti-effraction door according to claim 10 wherein said frame (28) comprises a broad peripheral fixing flange (34) glued on said first side (12) of said armoured panel (10)
EP02025870A 2002-11-19 2002-11-19 Anti-effraction door Expired - Lifetime EP1422490B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES02025870T ES2341536T3 (en) 2002-11-19 2002-11-19 DOOR- ANTI-INTRUSION.
DE60235817T DE60235817D1 (en) 2002-11-19 2002-11-19 Burglar-proof door
EP02025870A EP1422490B1 (en) 2002-11-19 2002-11-19 Anti-effraction door
AT02025870T ATE462951T1 (en) 2002-11-19 2002-11-19 BURGLARY-PROOF DOOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02025870A EP1422490B1 (en) 2002-11-19 2002-11-19 Anti-effraction door

Publications (2)

Publication Number Publication Date
EP1422490A1 EP1422490A1 (en) 2004-05-26
EP1422490B1 true EP1422490B1 (en) 2010-03-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP02025870A Expired - Lifetime EP1422490B1 (en) 2002-11-19 2002-11-19 Anti-effraction door

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EP (1) EP1422490B1 (en)
AT (1) ATE462951T1 (en)
DE (1) DE60235817D1 (en)
ES (1) ES2341536T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006134407A1 (en) * 2005-06-14 2006-12-21 Soukos Robots S.A. Rocket-propelled grenade protection system
FR2998596A1 (en) * 2012-11-28 2014-05-30 Structures Deformable type structure for protecting e.g. core of nuclear power plant against impact of projectile, has set of elements secured to another set of elements, where former set common direction forms angle with latter set common direction

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR503320A (en) * 1917-04-25 1920-06-08 Sir W G Armstrong Shielding improvements
GB577785A (en) * 1938-06-02 1946-05-31 Anthony Joseph Marek Improvements in or relating to bullet-proof armour plating
FR1103549A (en) 1954-04-21 1955-11-03 Cie De Fives Lille Pour Const Shielding device
US4404889A (en) * 1981-08-28 1983-09-20 The United States Of America As Represented By The Secretary Of The Army Composite floor armor for military tanks and the like
US5705765A (en) * 1996-05-30 1998-01-06 United Defense, L.P. Passive roof armor
DE19735594A1 (en) * 1997-08-15 1999-02-25 Henschel Wehrtechnik Gmbh Device for ensuring availability of armoured wheel and chain vehicles against effect of mines
DE19825260B4 (en) * 1998-06-05 2007-02-08 Geke Technologie Gmbh Arrangement for protecting objects against shaped charges

Also Published As

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DE60235817D1 (en) 2010-05-12
ATE462951T1 (en) 2010-04-15
ES2341536T3 (en) 2010-06-22
EP1422490A1 (en) 2004-05-26

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