EP0630465B1 - Device for positioning dispersible sub-ammunition - Google Patents

Device for positioning dispersible sub-ammunition Download PDF

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Publication number
EP0630465B1
EP0630465B1 EP94900192A EP94900192A EP0630465B1 EP 0630465 B1 EP0630465 B1 EP 0630465B1 EP 94900192 A EP94900192 A EP 94900192A EP 94900192 A EP94900192 A EP 94900192A EP 0630465 B1 EP0630465 B1 EP 0630465B1
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EP
European Patent Office
Prior art keywords
tabs
sub
mine
face
integral
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP94900192A
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German (de)
French (fr)
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EP0630465A1 (en
Inventor
Jean-Pierre Dussol
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Giat Industries SA
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Giat Industries SA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B23/00—Land mines ; Land torpedoes
    • F42B23/24—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/32—Range-reducing or range-increasing arrangements; Fall-retarding means
    • F42B10/48—Range-reducing, destabilising or braking arrangements, e.g. impact-braking arrangements; Fall-retarding means, e.g. balloons, rockets for braking or fall-retarding
    • F42B10/50—Brake flaps, e.g. inflatable

Definitions

  • the field of the present invention is that of positioning devices for dispersible submunitions and in particular for bi-directional mines with shaped charge.
  • the addition certificate FR2475716 discloses a bi-directional dispersible mine with a formed charge.
  • Patent US3205322 describes an anti-personnel mine dispersible by aircraft.
  • This mine has elastic tongues attached to its rear part. The tongues open when the mine falls, which makes it possible to stabilize the attitude of the latter with its front end directed towards the ground.
  • Such an arrangement makes it possible to orient the submunition favorably relative to the ground but it does not make it possible to improve the posability on hard ground, the mine then lying laterally and becoming ineffective.
  • the subject of the invention is a positioning device for a submunition on the ground after its impact, of the bidirectional dispersible mine type, and comprising a set of flexible tongues regularly distributed around the submunition, device characterized in that the distribution of the tongues is such that the result of the aerodynamic forces exerted on the submunition at its point of application behind the center of gravity of the latter, and in that the tongues integral with a face located at level of a rear part of the submunition in its direction of travel of its trajectory have a shape such that they undergo permanent deformation during the dispersion of the mine.
  • the positioning device is intended to equip a submunition dispersed by a vector animated with a rotational movement, such as an artillery cargo shell, it is characterized in that the tongues undergo a deformation permanent under the effect of centrifugal force.
  • the distribution of the tongues is such that they are all integral with a face situated at the level of a rear part of the submunition in its direction of travel of its trajectory.
  • the distribution of the tongues is such that the aerodynamic resistance resulting from the tongues secured to a face situated at the level of a rear part of the submunition in its direction of travel of its trajectory is greater than that of the tongues secured of a face opposite to the rear face.
  • the number of tongues secured to the front face may be equal to that of the tongues secured to the rear face and the surface of the tongues secured to the rear face may be greater than that of the tongues secured to the front face.
  • the tongues integral with the front face are produced in the form of folded wires.
  • the tongues integral with the rear face of the submunition make in an deployed position an angle with the axis of the submunition which is such that the diameter of a circle on which their ends are distributed. free is greater than twice the height of the submunition.
  • the deformable tongues have a geometry such that they have a cross section which decreases regularly from the base of the tongue towards its free end.
  • the deformable tongues may have a longitudinal opening whose width increases regularly from the base of the tongue towards its free end.
  • a submunition 1 of the dispersible mine type comprises a housing 2 containing an explosive charge 3.
  • the latter comprises, in a known manner and described by FR2475716, two coatings (the coatings of this charge are not shown).
  • the housing 2 is embedded in a damping structure 4 made of plastic.
  • Two metal washers 5 and 6 are positioned on annular notches 7 and 8 arranged respectively on the flat faces 9 and 10.
  • the washers are made integral with the mine by means of tie rods 11, regularly distributed angularly, and which pass through the mine. The ends of the tie rods are riveted on the washers 5 and 6.
  • the mine also has flexible tongues 12 regularly distributed around its periphery. One end of these tongues is made integral with one face of the mine at the level of the rivets 13a, 13b of the tie rods 11 on the washers 5 or 6.
  • the other end of the tongues is free and is located substantially in a median plane 14 of the mine.
  • a certain number of tongues is fixed on the face 10
  • an equal number of tongues is fixed on the face 9.
  • the tongues integral with one face are arranged in angular alternation with the tongues integral with the other side.
  • the tongues 12 can be folded into housings 15 arranged in the damping structure 4. They are thus folded when the mine is placed inside a shell or a launching tube. They deploy when the mine is ejected from the shell or the launch tube.
  • the elastic tabs make it possible to solve the problem of the orientation of the mine on hard ground, but they are completely inoperative on a loose ground in which the mines sink in a random position what which makes them ineffective.
  • FIG. 2 represents a submunition 1, of the bidirectional mine type with a shaped charge, which is equipped with a positioning device according to a first embodiment of the invention.
  • This mine 1 also includes two metal washers 5 and 6 which are positioned on annular notches 7 and 8 arranged respectively on the flat faces 9 and 10.
  • the washers are made integral with the mine by means of tie rods 11 regularly angularly distributed and which pass through the mine.
  • the ends of the tie rods are fixed by rivets 13a, 13b on the washers 5 and 6.
  • the mine 1 here comprises sixteen tongues 16 regularly angularly distributed and one end of which is made integral with the face 10 of the mine at the level of the rivets 13b of the tie rods 11 on the washer 6.
  • the face 10 of the mine is that which is situated at the rear of the mine in its direction of travel of its trajectory after it is ejected from a shell or from a disperser tube.
  • This arrangement stabilizes the mine and allows it to maintain a constant attitude on its trajectory, the face 9 facing forward and the face 10 facing rear.
  • This constant orientation is favorable to the correct positioning of the mine whatever the type of soil as will be described later.
  • the tongues can be folded into housings 15 arranged in the damping structure 4.
  • the free ends of the tongues are in a plane 17 which is closer to the front face 9 of the mine than to the rear face 10 on which the tongues are fixed.
  • the tongues thus have a length greater than half the height H of the mine.
  • Some tongues 16a have an opening 18, they are placed alternately with tongues 16b without opening.
  • the tongues make in their deployed position an angle with the axis 19 of the lead which is such that the diameter D of a circle on which their free ends are distributed is greater than once and half the height H of the mine (for a mine whose height is substantially equal to the half external diameter of the damping structure 4).
  • This arrangement makes it possible to ensure that, in the event of a rebound on hard ground and the mine falling back onto its edge after its rebound, the tongues bring the mine back into contact with the ground at one of its flat faces.
  • Figure 4 shows a second embodiment of the positioning device according to the invention.
  • the face 10, or rear face of the mine carries tongues 20b regularly distributed angularly and which are made integral with the mine by the rivets 13b of the tie rods 11.
  • the face 9, or front face of the mine, carries tongues 20a regularly distributed angularly.
  • the free ends of the tongues 20a and 20b lie substantially in the median plane 14 of the mine.
  • the tongues can be folded into housings 15 arranged in the damping structure 4.
  • the tongues 20a which are integral with the front face 9 of the mine have openings 18a
  • the tongues 20b which are integral with the rear face 10 of the mine have openings 18b.
  • the dimensions of the openings 18a and 18b are such that the surface of the tongues 20b secured to the rear face 10 is greater than that of the tongues 20a secured to the front face 9.
  • tabs 20a at the front face will limit the penetration of the mine into loose soil.
  • the tongues 20a will be manufactured by bending a metal wire and spot welding 21 of this wire on the washer 5 (see FIG. 5).
  • the washer 5 is made integral with the front face 9 by the rivets 13a of the tie rods 11.
  • the tongues make in their deployed position an angle with the axis 19 of the lead which is such that the diameter D of a circle on which their free ends are distributed is greater than twice the height H from mine.
  • FIGS. 2 to 5 show positioning devices more particularly adapted to mines intended to be dispersed by tubes or non-gyrating or weakly gyrating vectors (such as rockets or planing missiles).
  • Figures 6 and 7 show a third embodiment of the positioning device according to the invention, embodiment more particularly intended to equip mines which are dispersed by a vector animated by a rotational movement, such as a cargo shell of artillery.
  • the mine carries eight tongues 22 which are all fixed on its rear face 10. No tongue is fixed on the front face 9.
  • the method of fixing the tongues is the same as that described for the previous embodiments ( riveting the tie rods on the washer which is fixed on the rear face 10).
  • Figures 8a and 8b show a tongue 22 alone in two orthogonal views.
  • This tab is made of folded sheet steel. It comprises a rear fold 23 on which a hole 24 is drilled allowing the fixing of the tongue on the rear face 10 of the mine. It also has a front spout 25 and a longitudinal opening 26. The opening thus delimits two branches 27a, 27b on the tongue 22
  • the front spout 25 secures the two branches 27a and 27b and thus ensures a certain rigidity at the free end of the tongue 22 which avoids deterioration during the assembly phases.
  • the width of the longitudinal opening 26 increases regularly from the base of the tongue 22 towards its free end. This arrangement has the effect of regularly decreasing the cross section of the tongue between its base and its free end.
  • the variation profile of the section of the tongue is chosen so that, when the tongue is subjected to centrifugal force during the ejection of the lead, the elastic limit of the tongue is reached at certain points without the breaking strength limit is not exceeded. It is thus possible to obtain permanent and controlled deformation of the tongues.
  • the profile of the tongue after deformation will be chosen so as to ensure sufficient aerodynamic resistance of the tongues to ensure the stabilization of the mine and allow it to maintain a constant attitude on its trajectory, the face 9 facing forward and the face 10 rear-facing.
  • Figure 8c shows the mine after it was ejected from a cargo shell.
  • the tongues 22 then have a permanent deformation and their free ends are distributed over a circle whose diameter D is greater than twice the height H of the mine.
  • tongues have, after permanent deformation, a certain rigidity which improves the return of the mine bearing on the ground at one of its flat faces, when it fell on its edge after bouncing on hard ground.
  • tongues without opening 26 but whose cross section nevertheless decreases regularly from the base of the tongue towards its free end.
  • the shape of the tongues will then be substantially triangular or trapezoidal.
  • FIG. 9 shows diagrammatically the arrival of a mine 1 equipped with a positioning device according to the invention on loose soil 28.
  • the presence of the tabs 22 fixed on the rear face 10 ensures an arrival of the mine with a constant attitude on its trajectory.
  • the trajectory is marked by curve 29 in dotted lines.
  • the mine is represented in 30a and 30b in the last moments before its impact on the ground 28.
  • the mine touches the ground by its front face 9 which sinks into the loose soil. The penetration is limited by the presence of the tabs 22.
  • the mine is therefore positioned correctly on the ground (position 30c) with its rear face 10 substantially parallel to the ground and oriented towards a possible target.
  • FIGS. 10a and 10b show diagrammatically the arrival of a mine 1 equipped with a positioning device according to the invention on hard ground 31.
  • the mine rebounds and follows a trajectory identified by the curve 33. It then falls either on one of its flat faces 9 or 10 (case not shown here and corresponding to a correct position of the mine on the ground), or on its edge (position 32c).
  • tongues 22 whose free ends are on a circle with a diameter greater than twice the height of the mine allows it to tilt (position 32d or 32f), ie towards the equilibrium position 32e with the face rear 10 in contact with the ground, or towards the equilibrium position 32g with the front face 9 in contact with the ground (FIG. 10b).
  • the lead being of the bidirectional type any one of the positions 32g or 32e allows correct subsequent operation.
  • Such a variant makes it possible to apply the invention to submunitions which are ejected from a disperser which is not driven in a rotational movement or else whose rotational movement is too slow for the centrifugal force to be able to deform the tabs (rocket, missile or bomb type disperser).
  • each tab As a function of the air resistance forces encountered with the chosen dispersion system.
  • the tongue will in all cases have the shape of a beam of equal resistance to bending.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Catching Or Destruction (AREA)
  • Soil Working Implements (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Body Structure For Vehicles (AREA)
  • Moving Of Heads (AREA)

Abstract

The field of the present invention is that of devices for positioning dispersible sub-ammunition. The device for positioning sub-ammunition (1) according to the invention comprises a series of flexible tongues (16, 20, 22) regularly spaced about the sub-ammunition. The device is characterized in that the tongues are so arranged that the resultant of the aerodynamic forces acting on the sub-ammunition (1) is applied at a point to the rear of the latter's centre of gravity, and in that the tongues (22) secured to a surface (10) located in a rear part of the sub-ammunition in the direction of its path are so shaped that they undergo permanent deformation once the mine is released. Application to dispersible mines.

Description

Le domaine de la présente invention est celui des dispositifs de positionnement pour des sous-munitions dispersables et en particulier pour des mines bidirectionnelles à charge formée.The field of the present invention is that of positioning devices for dispersible submunitions and in particular for bi-directional mines with shaped charge.

Lorsqu'on répartit des mines sur le terrain au moyen d'un obus cargo ou encore avec un engin disperseur de mines, il se pose le problème de leur positionnement sur le sol.When distributing mines on the ground by means of a cargo shell or even with a mine disperser, there is the problem of their positioning on the ground.

On connaît par le certificat d'addition FR2475716 une mine dispersable bidirectionnlle à charge formée.The addition certificate FR2475716 discloses a bi-directional dispersible mine with a formed charge.

Une telle mine est efficace quelle que soit la face sur laquelle elle arrive au sol. Des languettes élastiques réparties sur sa périphérie permettent d'éviter une immobilisation de la mine sur sa tranche en la ramenant dans une position stable sur une ou l'autre de ses faces.Such a mine is effective regardless of the face on which it reaches the ground. Elastic tabs distributed over its periphery make it possible to avoid immobilization of the mine on its edge by bringing it back to a stable position on one or the other of its faces.

Cependant si ces languettes élastiques permettent de résoudre le problème de l'orientation de la mine sur un sol dur, elles sont totalement inopérantes sur un sol meuble dans lequel les mines s'enfoncent dans une position aléatoire ce qui les rend inefficaces.However, if these elastic tongues make it possible to solve the problem of the orientation of the mine on hard ground, they are totally inoperative on loose soil in which the mines sink into a random position which makes them ineffective.

Le brevet US3205322 dont l'exposé est pris à base du préambule de la revendication indépendante 1, décrit une mine anti-personnel dispersable par aéronef. Cette mine comporte des languettes élastiques fixées à sa partie arrière. Les languettes s'ouvrent lors de la chute de la mine ce qui permet de stabiliser l'attitude de cette dernière avec son extrémité avant dirigée vers le sol. Une telle disposition permet d'orienter favorablement la sous-munition par rapport au sol mais elle ne permet pas d'améliorer la posabilité sur sol dur, la mine se couchant alors latéralement et devenant inefficace.Patent US3205322, the description of which is taken from the preamble of independent claim 1, describes an anti-personnel mine dispersible by aircraft. This mine has elastic tongues attached to its rear part. The tongues open when the mine falls, which makes it possible to stabilize the attitude of the latter with its front end directed towards the ground. Such an arrangement makes it possible to orient the submunition favorably relative to the ground but it does not make it possible to improve the posability on hard ground, the mine then lying laterally and becoming ineffective.

C'est l'objet de la présente invention que de proposer un dispositif de positionnement de mines dispersables et notamment de mines bidirectionnelles à charge formée, dispositif qui assure une mise en place correcte des mines aussi bien sur sol meuble que sur sol dur.It is the object of the present invention to propose a device for positioning dispersible mines and in particular bidirectional mines with shaped charge, a device which ensures correct placement of the mines both on soft ground and on hard ground.

Ainsi l'invention a pour objet un dispositif de positionnement pour une sous-munition sur le sol après son impact, du type mine dispersable bidirectionnelle, et comprenant un jeu de languettes flexibles régulièrement réparties autour de la sous-munition, dispositif caractérisé en ce que la répartition des languettes est telle que la résultante des efforts aérodynamiques qui s'exercent sur la sous-munition a son point d'application en arrière du centre de gravité de cette dernière, et en ce que les languettes solidaires d'une face située au niveau d'une partie arrière de la sous-munition dans son sens de parcours de sa trajectoire présentent une forme telle qu'elles subissent une déformation permanente lors de la dispersion de la mine.Thus the subject of the invention is a positioning device for a submunition on the ground after its impact, of the bidirectional dispersible mine type, and comprising a set of flexible tongues regularly distributed around the submunition, device characterized in that the distribution of the tongues is such that the result of the aerodynamic forces exerted on the submunition at its point of application behind the center of gravity of the latter, and in that the tongues integral with a face located at level of a rear part of the submunition in its direction of travel of its trajectory have a shape such that they undergo permanent deformation during the dispersion of the mine.

Selon un mode particulier de réalisation, le dispositif de positionnement est destiné à équiper une sous-munition dispersée par un vecteur animé d'un mouvement de rotation, tel un obus cargo d'artillerie, il est caractérisé en ce que les languettes subissent une déformation permanente sous l'effet de la force centrifuge.According to a particular embodiment, the positioning device is intended to equip a submunition dispersed by a vector animated with a rotational movement, such as an artillery cargo shell, it is characterized in that the tongues undergo a deformation permanent under the effect of centrifugal force.

Avantageusement, la répartition des languettes est telle qu'elles sont toutes solidaires d'une face située au niveau d'une partie arrière de la sous-munition dans son sens de parcours de sa trajectoire.Advantageously, the distribution of the tongues is such that they are all integral with a face situated at the level of a rear part of the submunition in its direction of travel of its trajectory.

Selon une variante, la répartition des languettes est telle que la résistance aérodynamique résultant des languettes solidaires d'une face située au niveau d'une partie arrière de la sous-munition dans son sens de parcours de sa trajectoire est supérieure à celle des languettes solidaires d'une face opposée à la face arrière.According to a variant, the distribution of the tongues is such that the aerodynamic resistance resulting from the tongues secured to a face situated at the level of a rear part of the submunition in its direction of travel of its trajectory is greater than that of the tongues secured of a face opposite to the rear face.

En particulier, le nombre de languettes solidaires de la face avant pourra être égal à celui des languettes solidaires de la face arrière et la surface des languettes solidaires de la face arrière pourra être supérieure à celle des languettes solidaires de la face avant.In particular, the number of tongues secured to the front face may be equal to that of the tongues secured to the rear face and the surface of the tongues secured to the rear face may be greater than that of the tongues secured to the front face.

Selon un mode d'exécution particulier, les languettes solidaires de la face avant sont réalisées sous la forme de fils pliés.According to a particular embodiment, the tongues integral with the front face are produced in the form of folded wires.

D'une façon préférentielle, les languettes solidaires de la face arrière de la sous-munition font dans une position déployée un angle avec l'axe de la sous-munition qui est tel que le diamètre d'un cercle sur lequel sont réparties leurs extrémités libres est supérieur à deux fois la hauteur de la sous-munition.Preferably, the tongues integral with the rear face of the submunition make in an deployed position an angle with the axis of the submunition which is such that the diameter of a circle on which their ends are distributed. free is greater than twice the height of the submunition.

D'une façon préférée, les languettes déformables ont une géométrie telle qu'elles présentent une section transversale qui décroît régulièrement de la base de la languette vers son extrémité libre.Preferably, the deformable tongues have a geometry such that they have a cross section which decreases regularly from the base of the tongue towards its free end.

Les languettes déformables pourront présenter une ouverture longitudinale dont la largeur croît régulièrement de la base de la languette vers son extrémité libre.The deformable tongues may have a longitudinal opening whose width increases regularly from the base of the tongue towards its free end.

L'invention sera mieux comprise à la lecture de la description qui va suivre de modes particuliers de réalisation, description faite en référence aux dessins annexés et dans lesquels:

  • la figure 1 représente schématiquement et en coupe partielle une mine bidirectionnelle équipée d'un dispositif de positionnement selon l'état de la technique,
  • la figure 2 représente en coupe partielle une mine bidirectionnelle équipée d'un dispositif de positionnement selon un premier mode de réalisation de l'invention,
  • la figure 3 est une vue de la mine de la figure 2 suivant la direction X,
  • la figure 4 représente en coupe partielle une mine bidirectionnelle équipée d'un dispositif de positionnement selon un deuxième mode de réalisation de l'invention,
  • la figure 5 est une vue de détail d'une des languettes solidaires de la face avant de la mine selon la figure 4,
  • les figures 6 et 7 représentent une mine bidirectionnelle équipée d'un dispositif de positionnement selon un troisième mode de réalisation de l'invention,
  • les figures 8a et 8b représentent une languette seule, la figure 8b étant une coupe de la languette suivant le plan dont la trace AA est repérée sur la figure 8a.
  • la figure 8c montre la mine bidirectionnelle des figures 6 et 7 après la déformation permanente des languettes,
  • la figure 9 schématise l'arrivée d'une mine équipée d'un dispositif selon l'invention sur un sol meuble,
  • les figures 10a et 10b schématisent l'arrivée d'une mine équipée d'un dispositif selon l'invention sur un sol dur.
The invention will be better understood on reading the description which follows of particular embodiments, description made with reference to the appended drawings and in which:
  • FIG. 1 shows schematically and in partial section a bidirectional mine equipped with a positioning device according to the state of the art,
  • FIG. 2 shows in partial section a bidirectional mine equipped with a positioning device according to a first embodiment of the invention,
  • FIG. 3 is a view of the mine of FIG. 2 in the direction X,
  • FIG. 4 represents in partial section a bidirectional mine equipped with a positioning device according to a second embodiment of the invention,
  • FIG. 5 is a detailed view of one of the tongues secured to the front face of the mine according to FIG. 4,
  • FIGS. 6 and 7 represent a bidirectional mine equipped with a positioning device according to a third embodiment of the invention,
  • Figures 8a and 8b show a single tongue, Figure 8b being a section of the tongue along the plane whose trace AA is identified in Figure 8a.
  • FIG. 8c shows the bidirectional lead of FIGS. 6 and 7 after the permanent deformation of the tongues,
  • FIG. 9 shows diagrammatically the arrival of a mine equipped with a device according to the invention on loose soil,
  • Figures 10a and 10b show schematically the arrival of a mine equipped with a device according to the invention on hard ground.

En se reportant à la figure 1, une sous-munition 1 du type mine dispersable, selon l'état de la technique représenté par le certificat d'addition FR2475716, comprend un boîtier 2 contenant une charge explosive 3. Cette dernière comporte, d'une façon connue et décrite par FR2475716, deux revêtements (les revêtements de cette charge ne sont pas représentés).Referring to FIG. 1, a submunition 1 of the dispersible mine type, according to the state of the art represented by the certificate of addition FR2475716, comprises a housing 2 containing an explosive charge 3. The latter comprises, in a known manner and described by FR2475716, two coatings (the coatings of this charge are not shown).

Le boîtier 2 est noyé dans une structure amortissante 4 en matière plastique. Deux rondelles métalliques 5 et 6 sont positionnées sur des encoches annulaires 7 et 8 aménagées respectivement sur les faces planes 9 et 10.The housing 2 is embedded in a damping structure 4 made of plastic. Two metal washers 5 and 6 are positioned on annular notches 7 and 8 arranged respectively on the flat faces 9 and 10.

Les rondelles sont rendues solidaires de la mine par l'intermédiaire de tirants 11, régulièrement répartis angulairement, et qui traversent la mine. Les extrémités des tirants sont rivetées sur les rondelles 5 et 6.The washers are made integral with the mine by means of tie rods 11, regularly distributed angularly, and which pass through the mine. The ends of the tie rods are riveted on the washers 5 and 6.

La mine comporte également des languettes flexibles 12 régulièrement réparties sur son pourtour. Une extrémité de ces languettes est rendue solidaire d'une face de la mine au niveau des rivetages 13a, 13b des tirants 11 sur les rondelles 5 ou 6.The mine also has flexible tongues 12 regularly distributed around its periphery. One end of these tongues is made integral with one face of the mine at the level of the rivets 13a, 13b of the tie rods 11 on the washers 5 or 6.

L'autre extrémité des languettes est libre et se trouve sensiblement dans un plan médian 14 de la mine.The other end of the tongues is free and is located substantially in a median plane 14 of the mine.

Un certain nombre de languettes est fixé sur la face 10, un nombre égal de languettes est fixé sur la face 9.A certain number of tongues is fixed on the face 10, an equal number of tongues is fixed on the face 9.

Les languettes solidaires d'une face sont disposées en alternance angulaire avec les languettes solidaires de l'autre face.The tongues integral with one face are arranged in angular alternation with the tongues integral with the other side.

Les languettes 12 peuvent se replier dans des logements 15 aménagés dans la structure amortissante 4. Elles se trouvent ainsi repliées lorsque la mine est disposée à l'intérieur d'un obus ou d'un tube lanceur. Elles se déploient lors de l'éjection de la mine hors de l'obus ou du tube lanceur.The tongues 12 can be folded into housings 15 arranged in the damping structure 4. They are thus folded when the mine is placed inside a shell or a launching tube. They deploy when the mine is ejected from the shell or the launch tube.

Comme cela a été précisé dans le préambule, les languettes élastiques permettent de résoudre le problème de l'orientation de la mine sur un sol dur, mais elles sont totalement inopérantes sur un sol meuble dans lequel les mines s'enfoncent dans une position aléatoire ce qui les rend inefficaces.As it was specified in the preamble, the elastic tabs make it possible to solve the problem of the orientation of the mine on hard ground, but they are completely inoperative on a loose ground in which the mines sink in a random position what which makes them ineffective.

La figure 2 représente une sous-munition 1, de type mine bidirectionnelle à charge formée, qui est équipée d'un dispositif de positionnement selon un premier mode de réalisation de l'invention.FIG. 2 represents a submunition 1, of the bidirectional mine type with a shaped charge, which is equipped with a positioning device according to a first embodiment of the invention.

Cette mine 1 comporte également deux rondelles métalliques 5 et 6 qui sont positionnées sur des encoches annulaires 7 et 8 aménagées respectivement sur les faces planes 9 et 10.This mine 1 also includes two metal washers 5 and 6 which are positioned on annular notches 7 and 8 arranged respectively on the flat faces 9 and 10.

Les rondelles sont rendues solidaires de la mine par l'intermédiaire de tirants 11 régulièrement répartis angulairement et qui traversent la mine. Les extrémités des tirants sont fixées par des rivetages 13a, 13b sur les rondelles 5 et 6.The washers are made integral with the mine by means of tie rods 11 regularly angularly distributed and which pass through the mine. The ends of the tie rods are fixed by rivets 13a, 13b on the washers 5 and 6.

La mine 1 comporte ici seize languettes 16 régulièrement réparties angulairement et dont une extrémité est rendue solidaire de la face 10 de la mine au niveau des rivetages 13b des tirants 11 sur la rondelle 6.The mine 1 here comprises sixteen tongues 16 regularly angularly distributed and one end of which is made integral with the face 10 of the mine at the level of the rivets 13b of the tie rods 11 on the washer 6.

Aucune languette n'est fixée au niveau de la face 9 de la mine.No tongue is attached to the face 9 of the mine.

La face 10 de la mine est celle qui est située à l'arrière de la mine dans son sens de parcours de sa trajectoire après son éjection hors d'un obus ou hors d'un tube disperseur.The face 10 of the mine is that which is situated at the rear of the mine in its direction of travel of its trajectory after it is ejected from a shell or from a disperser tube.

Cette répartition particulière des languettes permet d'assurer que la résultante des efforts aérodynamiques qui s'exercent sur la mine lors de sa trajectoire balistique aura son point d'application en arrière du centre de gravité de la mine (ce dernier se trouve sensiblement à l'intersection d'un plan médian 14 et de l'axe 19 de la mine).This particular distribution of the tabs ensures that the result of the aerodynamic forces exerted on the mine during its ballistic trajectory will have its point of application behind the center of gravity of the mine (the latter is located substantially at the 'intersection of a median plane 14 and the axis 19 of the mine).

Cette disposition stabilise la mine et lui permet de conserver une attitude constante sur sa trajectoire, la face 9 orientée vers l'avant et la face 10 orientée vers l'arrière.This arrangement stabilizes the mine and allows it to maintain a constant attitude on its trajectory, the face 9 facing forward and the face 10 facing rear.

Cette orientation constante est favorable au bon positionnement de la mine quel que soit le type de sol comme cela sera décrit par la suite.This constant orientation is favorable to the correct positioning of the mine whatever the type of soil as will be described later.

Les languettes peuvent se replier dans des logements 15 aménagés dans la structure amortissante 4.The tongues can be folded into housings 15 arranged in the damping structure 4.

Les extrémités libres des languettes se trouvent dans un plan 17 qui se trouve plus proche de la face avant 9 de la mine que de la face arrière 10 sur laquelle les languettes sont fixées.The free ends of the tongues are in a plane 17 which is closer to the front face 9 of the mine than to the rear face 10 on which the tongues are fixed.

Les languettes ont ainsi une longueur supérieure à la moitié de la hauteur H de la mine.The tongues thus have a length greater than half the height H of the mine.

Certaines languettes 16a présentent une ouverture 18, elles sont placées en alternance avec des languettes 16b dépourvues d'ouverture.Some tongues 16a have an opening 18, they are placed alternately with tongues 16b without opening.

Il est possible ainsi, en jouant sur la longueur des languettes et sur les dimensions des ouvertures, de faire varier la position du point d'application des efforts aérodynamiques et donc d'adapter le dispositif selon l'invention à des sous-munitions de différentes formes, de différentes masses ou éjectées avec des vitesses différentes.It is thus possible, by varying the length of the tongues and the dimensions of the openings, to vary the position of the point of application of the aerodynamic forces and therefore to adapt the device according to the invention to submunitions of different shapes, of different masses or ejected with different speeds.

Il est également possible de jouer sur le nombre de languettes 16.It is also possible to play on the number of tabs 16.

A titre de variante et en fonction des caractéristiques de la mine, on pourra donc prévoir des ouvertures 18 sur toutes les languettes 16 ou encore sur aucune languette.As a variant and depending on the characteristics of the mine, we can therefore provide openings 18 on all the tongues 16 or on any tongue.

Selon une autre caractéristique de l'invention, les languettes font dans leur position déployée un angle avec l'axe 19 de la mine qui est tel que le diamètre D d'un cercle sur lequel sont réparties leurs extrémités libres est supérieur à une fois et demi la hauteur H de la mine (pour une mine dont la hauteur est sensiblement égale au demi diamètre externe de la structure amortissante 4).According to another characteristic of the invention, the tongues make in their deployed position an angle with the axis 19 of the lead which is such that the diameter D of a circle on which their free ends are distributed is greater than once and half the height H of the mine (for a mine whose height is substantially equal to the half external diameter of the damping structure 4).

Cette disposition permet d'assurer que, en cas de rebond sur sol dur et retombée de la mine sur sa tranche après son rebond, les languettes ramènent la mine en appui sur le sol au niveau d'une de ses faces planes.This arrangement makes it possible to ensure that, in the event of a rebound on hard ground and the mine falling back onto its edge after its rebound, the tongues bring the mine back into contact with the ground at one of its flat faces.

Il sera également possible de jouer sur l'elasticité des languettes pour favoriser le déséquilibre de la mine lorsqu'elle tombe sur sa tranche. Un tel déséquilibre ramènant la mine en appui sur le sol au niveau d'une de ses faces planes.It will also be possible to play on the elasticity of the tongues to promote the imbalance of the mine when it falls on its edge. Such an imbalance brings the mine back onto the ground at one of its flat faces.

D'une façon plus générale on s'assurera que le diamètre D du cercle ainsi que la position du plan 17 dans lequel se trouvent les extrémités libres des languettes sont tels que la position d'une mine sur sa tranche soit une position instable.More generally, it will be ensured that the diameter D of the circle as well as the position of the plane 17 in which the free ends of the tongues are located are such that the position of a mine on its edge is an unstable position.

La figure 4 montre un deuxième mode de réalisation du dispositif de positionnement selon l'invention.Figure 4 shows a second embodiment of the positioning device according to the invention.

Dans ce mode particulier de réalisation la face 10, ou face arrière de la mine, porte des languettes 20b régulièrement réparties angulairement et qui sont rendues solidaires de la mine par les rivetages 13b des tirants 11.In this particular embodiment, the face 10, or rear face of the mine, carries tongues 20b regularly distributed angularly and which are made integral with the mine by the rivets 13b of the tie rods 11.

La face 9, ou face avant de la mine, porte des languettes 20a régulièrement réparties angulairement.The face 9, or front face of the mine, carries tongues 20a regularly distributed angularly.

Les extrémités libres des languettes 20a et 20b se trouvent sensiblement dans le plan médian 14 de la mine.The free ends of the tongues 20a and 20b lie substantially in the median plane 14 of the mine.

Les languettes peuvent se replier dans des logements 15 aménagés dans la structure amortissante 4.The tongues can be folded into housings 15 arranged in the damping structure 4.

Les languettes 20a qui sont solidaires de la face avant 9 de la mine présentent des ouvertures 18a, et les languettes 20b qui sont solidaires de la face arrière 10 de la mine présentent des ouvertures 18b.The tongues 20a which are integral with the front face 9 of the mine have openings 18a, and the tongues 20b which are integral with the rear face 10 of the mine have openings 18b.

Les dimensions des ouvertures 18a et 18b sont telles que la surface des languettes 20b solidaires de la face arrière 10 est supérieure à celle des languettes 20a solidaires de la face avant 9.The dimensions of the openings 18a and 18b are such that the surface of the tongues 20b secured to the rear face 10 is greater than that of the tongues 20a secured to the front face 9.

Une telle disposition permet d'assurer que la résistance aérodynamique apportée par les languettes 20b solidaires de la face arrière 10 est supérieure à celle des languettes 20a solidaires de la face avant 9.Such an arrangement ensures that the aerodynamic resistance provided by the tongues 20b secured to the rear face 10 is greater than that of the tongues 20a secured to the front face 9.

Ainsi la résultante des efforts aérodynamiques qui s'exercent sur la mine lors de sa trajectoire balistique aura encore son point d'application en arrière du centre de gravité de la mine et la mine conservera une attitude constante sur sa trajectoire, face 9 orientée vers l'avant et face 10 orientée vers l'arrière.Thus the result of the aerodynamic forces exerted on the mine during its ballistic trajectory will still have its point of application behind the center of gravity of the mine and the mine will maintain a constant attitude on its trajectory, face 9 oriented towards the 'front and face 10 facing rear.

La présence de languettes 20a au niveau de la face avant permettra de limiter l'enfoncement de la mine dans un sol meuble.The presence of tabs 20a at the front face will limit the penetration of the mine into loose soil.

Selon un mode de réalisation particulièrement avantageux, on fabriquera les languettes 20a par pliage d'un fil métallique et soudure par points 21 de ce fil sur la rondelle 5 (voir figure 5) . La rondelle 5 est rendue solidaire de la face avant 9 par les rivetages 13a des tirants 11.According to a particularly advantageous embodiment, the tongues 20a will be manufactured by bending a metal wire and spot welding 21 of this wire on the washer 5 (see FIG. 5). The washer 5 is made integral with the front face 9 by the rivets 13a of the tie rods 11.

Comme dans le mode de réalisation précédent, les languettes font dans leur position déployée un angle avec l'axe 19 de la mine qui est tel que le diamètre D d'un cercle sur lequel sont réparties leurs extrémités libres est supérieur à deux fois la hauteur H de la mine.As in the previous embodiment, the tongues make in their deployed position an angle with the axis 19 of the lead which is such that the diameter D of a circle on which their free ends are distributed is greater than twice the height H from mine.

Il est possible à titre de variante de jouer sur les longueurs des languettes, sur les dimensions des ouvertures et sur le nombre de languettes solidaires de chacune des faces.It is possible, as a variant, to play on the lengths of the tongues, on the dimensions of the openings and on the number of tongues secured to each of the faces.

On peut ainsi faire varier la position du point d'application des efforts aérodynamiques et donc adapter le dispositif selon l'invention à des sous-munitions de différentes formes ou différentes masses.It is thus possible to vary the position of the point of application of the aerodynamic forces and therefore to adapt the device according to the invention to submunitions of different shapes or different masses.

Les figures 2 à 5 montraient des dispositifs de positionnement plus particulièrement adaptés à des mines destinées à être dispersées par des tubes ou des vecteurs non girants ou faiblement girants (tels des roquettes ou des missiles planants).FIGS. 2 to 5 show positioning devices more particularly adapted to mines intended to be dispersed by tubes or non-gyrating or weakly gyrating vectors (such as rockets or planing missiles).

Les figures 6 et 7 montrent un troisième mode de réalisation du dispositif de positionnement selon l'invention, mode de réalisation plus particulièrement destiné à équiper des mines qui sont dispersées par un vecteur animé d'un mouvement de rotation, tel un obus cargo d'artillerie.Figures 6 and 7 show a third embodiment of the positioning device according to the invention, embodiment more particularly intended to equip mines which are dispersed by a vector animated by a rotational movement, such as a cargo shell of artillery.

Dans ce cas la mine porte huit languettes 22 qui sont toutes fixées sur sa face arrière 10. Aucune languette n'est fixée sur la face avant 9. Le mode de fixation des languettes est le même que celui décrit pour les modes de réalisation précédents (rivetage des tirants sur la rondelle qui est fixée sur la face arrière 10).In this case the mine carries eight tongues 22 which are all fixed on its rear face 10. No tongue is fixed on the front face 9. The method of fixing the tongues is the same as that described for the previous embodiments ( riveting the tie rods on the washer which is fixed on the rear face 10).

Ces languettes sont représentées sur les figures 6 et 7 dans une position non déformée. Elles peuvent se replier le long de la mine, leurs extrémités libres viennent alors dans des logements 15 aménagés dans la structure amortissante 4.These tabs are shown in Figures 6 and 7 in an undeformed position. They can fold back along the mine, their free ends then come into housings 15 arranged in the damping structure 4.

Les figures 8a et 8b représentent une languette 22 seule selon deux vues orthogonales.Figures 8a and 8b show a tongue 22 alone in two orthogonal views.

Cette languette est réalisée en tôle d'acier pliée. Elle comporte un repli arrière 23 sur lequel est percé un trou 24 permettant la fixation de la languette sur la face arrière 10 de la mine. Elle comporte également un bec avant 25 et une ouverture longitudinale 26. L'ouverture délimite ainsi deux branches 27a, 27b sur la languette 22This tab is made of folded sheet steel. It comprises a rear fold 23 on which a hole 24 is drilled allowing the fixing of the tongue on the rear face 10 of the mine. It also has a front spout 25 and a longitudinal opening 26. The opening thus delimits two branches 27a, 27b on the tongue 22

Le bec avant 25 solidarise les deux branches 27a et 27b et permet ainsi d'assurer une certaine rigidité à l'extrémité libre de la languette 22 ce qui évite les détériorations au cours des phases de montage.The front spout 25 secures the two branches 27a and 27b and thus ensures a certain rigidity at the free end of the tongue 22 which avoids deterioration during the assembly phases.

La largeur de l'ouverture longitudinale 26 croît régulièrement de la base de la languette 22 vers son extrémité libre. Cette disposition a pour conséquence de faire décroître régulièrement la section transversale de la languette entre sa base et son extrémité libre.The width of the longitudinal opening 26 increases regularly from the base of the tongue 22 towards its free end. This arrangement has the effect of regularly decreasing the cross section of the tongue between its base and its free end.

Le profil de variation de la section de la languette est choisi de telle sorte que, lorsque la languette est soumise à la force centrifuge lors de l'éjection de la mine, la limite élastique de la languette soit atteinte en certains de ses points sans que la limite de résistance à la rupture ne soit dépassée. Il est ppssible ainsi d'obtenir une déformation permanente et contrôlée des languettes.The variation profile of the section of the tongue is chosen so that, when the tongue is subjected to centrifugal force during the ejection of the lead, the elastic limit of the tongue is reached at certain points without the breaking strength limit is not exceeded. It is thus possible to obtain permanent and controlled deformation of the tongues.

Le profil de la languette après déformation sera choisi de façon à assurer une résistance aérodynamique suffisante des languettes pour assurer la stabilisation de la mine et lui permettre de conserver une attitude constante sur sa trajectoire, la face 9 orientée vers l'avant et la face 10 orientée vers l'arrière.The profile of the tongue after deformation will be chosen so as to ensure sufficient aerodynamic resistance of the tongues to ensure the stabilization of the mine and allow it to maintain a constant attitude on its trajectory, the face 9 facing forward and the face 10 rear-facing.

La détermination pratique du profil adapté sera faite par l'homme du métier en utilisant les principes bien connus de détermination de poutres d'égale résistance à la flexion.The practical determination of the suitable profile will be made by a person skilled in the art using the well-known principles for determining beams of equal flexural strength.

La figure 8c montre la mine après son éjection hors d'un obus cargo. Les languettes 22 présentent alors une déformation permanente et leurs extrémités libres se trouvent réparties sur un cercle dont le diamètre D est supérieur à deux fois la hauteur H de la mine.Figure 8c shows the mine after it was ejected from a cargo shell. The tongues 22 then have a permanent deformation and their free ends are distributed over a circle whose diameter D is greater than twice the height H of the mine.

Un autre avantage d'un tel mode de réalisation de l'invention est que les languettes présentent après déformation permanente une certaine rigidité qui améliore le retour de la mine en appui sur le sol au niveau d'une de ses faces planes, lorsqu'elle est tombée sur sa tranche après rebond sur un sol dur.Another advantage of such an embodiment of the invention is that the tongues have, after permanent deformation, a certain rigidity which improves the return of the mine bearing on the ground at one of its flat faces, when it fell on its edge after bouncing on hard ground.

On peut donc obtenir à la fois une valeur du diamètre D importante et une rigidité des languettes déployées importante.It is therefore possible to obtain both a large value of diameter D and a high rigidity of the deployed tongues.

En jouant sur les longueurs ou le nombre des languettes ou encore sur l'amplitude de leur déformation (donc leur résistance aérodynamique) il est possible de faire varier la position du point d'application des efforts aérodynamiques et donc d'adapter le dispositif selon l'invention à des sous-munitions de différentes formes ou différentes masses.By playing on the lengths or the number of the tongues or on the amplitude of their deformation (therefore their aerodynamic resistance) it is possible to vary the position of the point of application of the aerodynamic forces and therefore to adapt the device according to the invention to submunitions of different shapes or different masses.

On notera que, dans ce cas particulier d'une mine éjectée par un obus d'artillerie, la présence d'ouvertures 26 modifie relativement peu la traînée aérodynamique des languettes 22. Cela est vrai pour des vitesses résiduelles de l'ordre de 200m/s. Il est donc préférable dans ce cas de jouer sur le nombre des languettes et sur leurs dimensions.It will be noted that, in this particular case of a mine ejected by an artillery shell, the presence of openings 26 modifies the aerodynamic drag of the tongues 22 relatively little. This is true for residual speeds of the order of 200 m / s. It is therefore preferable in this case to play on the number of tabs and their dimensions.

Pour les mines dispersées avec des vitesses faibles (de l'ordre de 80 à 100m/s) les modes de réalisation décrits précédemment en référence aux figures 2 à 5 sont mieux adaptés et il sera possible alors de modifier la traînée aérodynamique en jouant sur les dimensions des ouvertures aménagées dans les languettes.For mines dispersed with low speeds (of the order of 80 to 100m / s) the embodiments described above with reference to Figures 2 to 5 are better suited and it will then be possible to modify the aerodynamic drag by playing on the dimensions of the openings in the tabs.

A titre de variante on pourra réaliser des languettes dépourvue d'ouverture 26 mais dont la section décroît néanmoins régulièrement de la base de la languette vers son extrémité libre. La forme des languettes sera alors sensiblement triangulaire ou trapézoïdale.As a variant, it will be possible to produce tongues without opening 26 but whose cross section nevertheless decreases regularly from the base of the tongue towards its free end. The shape of the tongues will then be substantially triangular or trapezoidal.

La figure 9 schématise l'arrivée d'une mine 1 équipée d'un dispositif de positionnement selon l'invention sur un sol meuble 28.FIG. 9 shows diagrammatically the arrival of a mine 1 equipped with a positioning device according to the invention on loose soil 28.

La présence des languettes 22 fixées sur la face arrière 10 assure une arrivée de la mine avec une attitude constante sur sa trajectoire. La trajectoire est repérée par la courbe 29 en traits pointillés. La mine est représentée en 30a et 30b dans les derniers instant avant son impact sur le sol 28.The presence of the tabs 22 fixed on the rear face 10 ensures an arrival of the mine with a constant attitude on its trajectory. The trajectory is marked by curve 29 in dotted lines. The mine is represented in 30a and 30b in the last moments before its impact on the ground 28.

La mine touche le sol par sa face avant 9 qui s'enfonce dans le sol meuble. L'enfoncement est limité par la présence des languettes 22.The mine touches the ground by its front face 9 which sinks into the loose soil. The penetration is limited by the presence of the tabs 22.

La mine se trouve donc positionnée correctement sur le sol (position 30c) avec sa face arrière 10 sensiblement parallèle au sol et orientée vers une cible éventuelle.The mine is therefore positioned correctly on the ground (position 30c) with its rear face 10 substantially parallel to the ground and oriented towards a possible target.

Les figures 10a et 10b schématisent l'arrivée d'une mine 1 équipée d'un dispositif de positionnement selon l'invention sur un sol dur 31.FIGS. 10a and 10b show diagrammatically the arrival of a mine 1 equipped with a positioning device according to the invention on hard ground 31.

La présence des languettes 22 fixées sur la face arrière 10 assure encore l'arrivée de la mine sur le sol 31 avec une attitude constante sur sa trajectoire. La trajectoire est repérée par la courbe 29 en traits pointillés. La mine est représentée en 32a au moment de son impact sur le sol dur 31.The presence of the tabs 22 fixed on the rear face 10 still ensures the arrival of the mine on the ground 31 with a constant attitude on its trajectory. The trajectory is marked by curve 29 in dotted lines. The mine is represented in 32a at the time of its impact on hard soil 31.

La mine rebondit et suit une trajectoire repérée par la courbe 33. Elle retombe alors soit sur une de ses faces planes 9 ou 10 (cas de figure non représenté ici et correspondant à une position correcte de la mine sur le sol), soit sur sa tranche (position 32c).The mine rebounds and follows a trajectory identified by the curve 33. It then falls either on one of its flat faces 9 or 10 (case not shown here and corresponding to a correct position of the mine on the ground), or on its edge (position 32c).

Dans ce dernier cas, la présence de languettes 22 dont les extrémités libres sont sur un cercle de diamètre supérieur à deux fois la hauteur de la mine permet son basculement (position 32d ou 32f), soit vers la position d'équilibre 32e avec la face arrière 10 en contact avec le sol, soit vers la position d'équilibre 32g avec la face avant 9 en contact avec le sol (figure 10b).In the latter case, the presence of tongues 22 whose free ends are on a circle with a diameter greater than twice the height of the mine allows it to tilt (position 32d or 32f), ie towards the equilibrium position 32e with the face rear 10 in contact with the ground, or towards the equilibrium position 32g with the front face 9 in contact with the ground (FIG. 10b).

La mine étant du type bidirectionnelle une quelconque des positions 32g ou 32e permet un fonctionnement ultérieur correct.The lead being of the bidirectional type any one of the positions 32g or 32e allows correct subsequent operation.

Il est bien entendu possible d'appliquer la présente invention à d'autres types de sous-munitions, notamment à des mines anti personnel dispersables.It is of course possible to apply the present invention to other types of submunitions, in particular to dispersible anti-personnel mines.

Il est possible également de combiner le présent mode de réalisation avec les modes précédents, c'est à dire de réaliser une sous-munition dont les languettes solidaires de la face arrière de la sous-munition dans son sens de parcours de sa trajectoire sont susceptibles de se déformer de façon permanente et dont les languettes solidaires de la face avant sont par exemple réalisées sous la forme de fils pliés. Les languettes avant aident au retour de la sous-munition sur une de ses faces planes en cas de chute sur la tranche.It is also possible to combine the present embodiment with the preceding modes, that is to say produce a submunition whose tongues secured to the rear face of the submunition in its direction of travel of its trajectory are capable of deforming permanently and whose tongues secured to the front face are for example made in the form of folded wires. The front tabs help return the submunition on one of its flat faces in the event of a fall on the edge.

Il est possible enfin de définir une sous-munition, du type de celles décrite en référence aux figures 2 à 5, et dans laquelle les languettes se déforment de façon permanente par l'action des efforts aérodynamiques qui s'exercent sur elles au moment de l'éjection.It is finally possible to define a submunition, of the type described with reference to FIGS. 2 to 5, and in which the tongues are deformed permanently by the action of the aerodynamic forces which are exerted on them at the time of ejection.

Une telle variante permet d'appliquer l'invention à des sous-munitions qui sont éjectées d'un disperseur qui n'est pas animé d'un mouvement de rotation ou bien dont le mouvement de rotation est trop lent pour que la force centrifuge puisse déformer les languettes (disperseur du type roquette, missile ou bombe).Such a variant makes it possible to apply the invention to submunitions which are ejected from a disperser which is not driven in a rotational movement or else whose rotational movement is too slow for the centrifugal force to be able to deform the tabs (rocket, missile or bomb type disperser).

Il suffit pour cela de dimensionner le profil de chaque languette en fonction des efforts de résistance de l'air rencontrés avec le système de dispersion choisi. La languette aura dans tous les cas une forme de poutre d'égale résistance à la flexion.To do this, it is sufficient to size the profile of each tab as a function of the air resistance forces encountered with the chosen dispersion system. The tongue will in all cases have the shape of a beam of equal resistance to bending.

Une telle disposition permet, comme cela a été décrit précédemment, d'améliorer le freinage de la sous-munition puisque les languettes restent déployées même après freinage et elle permet aussi de favoriser la posabilité de la sous-munition sur sol dur.Such an arrangement makes it possible, as has been described above, to improve the braking of the submunition since the tongues remain deployed even after braking and it also makes it possible to promote the posability of the submunition on hard ground.

Claims (9)

  1. A device to position a sub-munition (1) on the ground after impact, of the bi-directive scatterable type, which comprises a set of flexible tabs (16, 20, 22) evenly spaced around the sub-munition, a device characterized in that the distribution of the tabs is such that the resultant of the aerodynamic resistance to which the sub-munition (1) is subjected has its aerodynamic centre behind the latter's centre of gravity, and in that the tabs (22) integral with one face (10) located at a rear part of the sub-munition in the direction in which it follows its trajectory are of a shape such that they are subject to a permanent deformation when the mine is scattered.
  2. A positioninq device according to Claim 1 and intended to equip a sub-munition scattered by a carrier having a rotational movement, such as an artillery cargo shell, characterized in that the tabs are subject to a permanent deformation under the effect of the centrifugal forces.
  3. A positioning device according to Claim 1 or 2, characterized in that the spacing of the tabs (16, 22) is such that they are all integral with a face (10) situated on a rear part of the sub-munition (1) in the direction in which it follows its trajectory.
  4. A positioning device according to Claim 1 or 2, characterized in that the spacing of the tabs is such that the aerodynamic resistance which results from the tabs (20b) integral with a face (10) situated on the rear part of the sub-munition (1) in the direction in which it follows its trajectory is greater than that of the tabs (20a) integral with a face (9) opposite to the rear face.
  5. A positioning device according to Claim 4, characterized in that the number of tabs (20a) integral with a front face (9) is equal to that of the tabs integral with the rear face (10) and in that the surface area of the tabs integral with the rear face is greater than that of the tabs integral with the front face.
  6. A positioning device according to Claim 4 or 5, characterized in that the tabs (20a) integral with the front face (9) are made of folded wires.
  7. A positioning device according to one of Claims 1 to 6, characterized in that, in their deployed position, the tabs integral with the rear face (10) of the sub-munition (1) make an angle with the axis of the sub-munition such that the diametre (D) of a circle in which their free ends are distributed is greater than twice the height (H) of the sub-munition.
  8. A positioning device according to one of Claims 2 to 7, characterized in that the deformable tabs (22) have a geometry such that they have a transverse section which steadily decreases from the base of the tab to its free end.
  9. A positioning device according to Claim 8, characterized in that the deformable tabs have a longitudinal opening (26) whose width steadily increases from the base of the tab to its free end.
EP94900192A 1992-12-03 1993-11-16 Device for positioning dispersible sub-ammunition Expired - Lifetime EP0630465B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9214578A FR2698957B1 (en) 1992-12-03 1992-12-03 Positioning device for dispersible submunition.
FR9214578 1992-12-03
PCT/FR1993/001117 WO1994012848A1 (en) 1992-12-03 1993-11-16 Device for positioning dispersible sub-ammunition

Publications (2)

Publication Number Publication Date
EP0630465A1 EP0630465A1 (en) 1994-12-28
EP0630465B1 true EP0630465B1 (en) 1997-10-01

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Application Number Title Priority Date Filing Date
EP94900192A Expired - Lifetime EP0630465B1 (en) 1992-12-03 1993-11-16 Device for positioning dispersible sub-ammunition

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EP (1) EP0630465B1 (en)
JP (1) JPH07503531A (en)
AT (1) ATE158859T1 (en)
DE (1) DE69314329T2 (en)
FR (1) FR2698957B1 (en)
SG (1) SG49870A1 (en)
WO (1) WO1994012848A1 (en)

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Publication number Priority date Publication date Assignee Title
US11054230B1 (en) * 2018-06-14 2021-07-06 The United States Of America As Represented By The Secretary Of The Navy Flexible anti-personnel mine

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Publication number Priority date Publication date Assignee Title
US3195459A (en) * 1962-11-27 1965-07-20 Jr Edwin G Reed Bomb suspension cable
FR2475716B2 (en) * 1980-02-11 1985-11-29 France Etat BIDIRECTIONAL DISPERSABLE MINE WITH FORMED LOAD
GB2248804A (en) * 1990-10-19 1992-04-22 Marconi Gec Ltd Air-launched buoys

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WO1994012848A1 (en) 1994-06-09
DE69314329T2 (en) 1998-01-29
EP0630465A1 (en) 1994-12-28
DE69314329D1 (en) 1997-11-06
JPH07503531A (en) 1995-04-13
FR2698957B1 (en) 1995-02-03
FR2698957A1 (en) 1994-06-10
ATE158859T1 (en) 1997-10-15
SG49870A1 (en) 1998-06-15

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