EP0685059B1 - Dispositif de securite pour verrouiller un percuteur et procede de fabrication de ce dispositif - Google Patents
Dispositif de securite pour verrouiller un percuteur et procede de fabrication de ce dispositif Download PDFInfo
- Publication number
- EP0685059B1 EP0685059B1 EP95902158A EP95902158A EP0685059B1 EP 0685059 B1 EP0685059 B1 EP 0685059B1 EP 95902158 A EP95902158 A EP 95902158A EP 95902158 A EP95902158 A EP 95902158A EP 0685059 B1 EP0685059 B1 EP 0685059B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- fact
- firing pin
- striker
- grooves
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 7
- 238000010304 firing Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 7
- 229910001369 Brass Inorganic materials 0.000 description 5
- 239000010951 brass Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
- F42C15/20—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a securing-pin or latch is removed to arm the fuze, e.g. removed from the firing-pin
- F42C15/22—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a securing-pin or latch is removed to arm the fuze, e.g. removed from the firing-pin using centrifugal force
Definitions
- the field of the present invention is that of safety devices for locking a striker for a revolving projectile rocket.
- Projectiles including medium caliber shells, are fitted with safety devices intended to prevent initiation of the pyrotechnic chain before firing and during the first tens of meters of the trajectory ballistic.
- a known security device comprises a lock, by example a split ring, which immobilizes in translation the projectile striker, which is surrounded by a spring hairspring constituted by an elastic ribbon wound on himself.
- Patent DE1197786 whose description covers the preamble of claim 1, describes such a security device for a medium caliber projectile rocket.
- the lock consists of a band folded over it even so as to form a ring with a hexagonal profile.
- the ring forms a stop for a shoulder of the striker prohibiting him from coming to strike a primer.
- the lock Due to its split structure, the lock is susceptible to open by the action of the centrifugal force which is exerted on him when fired. Opening the lock allows the translation of the striker for example at impact on a target.
- a spiral spring is wrapped around the lock.
- the function of the spiral spring is to delay the moment opening the lock. This opening only occurring only after a few tens of meters of trajectory which ensures the safety of the weapon's servants.
- the centrifugal force exerted on the spring during firing thus causes its progressive unfolding and its winding against the wall of a cylindrical housing of the rocket.
- the safety device ensures that, when fired, the spiral spring remains correctly wound against its cylindrical housing without coming to form stray loops that could prevent the striker from coming initiate the primer.
- the subject of the invention is a device for safety device intended to lock a striker for a rocket of a revolving projectile, comprising a spiral spring constituted by an elastic ribbon wound on itself and recalled by its elasticity around an organ of lock that keeps the striker in position security, the locking member being constituted by a flexible band wrapped around the striker and the material or the geometry are such that it does not exercise elastic return force towards the striker, characterized in that the strip has a length such that, when it is found during the firing carried out following the spiral spring and applied against it by the action of centrifugal force, its ends overlap.
- the strip flexible has grooves, which are preferably oriented towards the striker.
- the striker may be cylindrical or have a polygonal section, preferably hexagonal.
- the grooves may have a variable pitch authorizing a winding of the strip on the striker following a polygonal figure.
- the grooves of the strip will be positioned when winding opposite the vertices of the polygon.
- the strip is such that, once unrolled following the spring spiral, its ends overlap on a bow included between 60 ° and 180 °.
- the invention also relates to a method of manufacturing such a device, process characterized in that it includes a step of making the grooves in the strip by knurling a smooth strip between a wheel and a counter pulley.
- Knurling can be performed with a pitch wheel variable.
- the strip can be driven between the wheel and the counter pulley by the rotation of an axis polygonal on which the knurled strip is wound, this axis polygonal being formed by the striker.
- a device for safety 1 is intended to lock a striker 2 in a safe position in which he cannot come strike a primer (not shown).
- the safety device includes a cylindrical housing 3 closed by a cover 4 which is fixed to the housing by example by screws (not shown).
- the housing delimits a cylindrical internal housing 14.
- the housing 3 is pierced with a hole 6 intended to authorize the passage of the tip 2a of the striker 2 to allow the percussion of the primer.
- the cover has a bore 7 by which the striker 2 enters the housing 3.
- the striker 2 has a shoulder 8 which comes in support on a locking member 9.
- the locking device 9 consists of a wound flexible strip in a spiral around a rod 2b secured to the striker 2.
- the strip 9 has grooves 10 parallel to each other and to axis 11 of the device.
- Band 9 can be made of brass, copper Berylium, stainless steel or not, nickel, or in reinforced plastic or not. The choice of material will be done according to the desired stiffness for the maintaining the striker 2 and the amplitude of the centrifugal forces developed during the firing for the projectile considered.
- the function of the grooves 10 is to give a some flexibility to the strip 9, allowing it to be wound up around the rod 2b of the striker 2 and facilitating its unfolding using a minimum of energy.
- the band will also be defined so that it does not exert an elastic return effort towards the striker both in its rolled-up position shown in Figures 1 and 2 only when it takes place after the shooting, as this will be described later.
- the strip 9 is kept in the locking position of the striker by a spiral spring 12 of known type.
- This spring is formed by an elastic brass ribbon, wound on itself, and kept wound on the strip 9 by its own elasticity.
- Other materials could be used to make the balance spring: Nickel, stainless steel, Copper / Berylium ...
- An elastic clip 13 made of steel or brass keeps the spiral spring 12 in its position safety shown in Figures 1 and 2, which prohibits any untimely unwinding of the hairspring when the projectile is subjected to vibrations, for example during phases transport.
- the band 9 is wound on the rod 2b of the striker 2 so that the grooves 10 are oriented outward i.e. towards the spiral spring 12.
- the centrifugal inertial force first causes the opening clip 13, which is pressed against the cylindrical surface internal 15 of housing 14.
- the spiral spring 12 then proceeds progressively and is wound in a spiral against the cylindrical surface internal 15.
- the unwinding of the tape is facilitated by the presence grooves that give flexibility even to a strip relatively thick.
- the diameter of the striker shoulder 8 is shown by circle 16 in broken lines. We thus see that the band 9 and hairspring 12 present in the unlocked position a winding diameter which is greater than the diameter of the shoulder 8. The striker rod 2 is therefore free to translate into hole 6.
- Figure 3 also shows that the strip 9 has a length such that in the unlocked position its ends 9a and 9b partially overlap on a corner arc at center ⁇ .
- This essential characteristic of the invention ensures that the spiral spring 12 is held on an arc of 360 ° by the unrolled strip 9.
- the covering of the ends of the band maintains the spring with effort substantially equal centrifugal in all directions radial. There is therefore no relative shift of the band and spring and no loops parasites.
- Band 9 can be given a length such that the overlapping arc has an angle at the center between 60 ° and 180 °, the preferred angle being of the order of 120 °.
- a strip end 9 is shown in dotted lines 17 giving a 180 ° overlap.
- the band exerts no recall effort elastic towards the striker in the unrolled position, it does not does not itself present parasitic curvature to its extremities.
- the band exerting no elastic return effort towards the striker in the rolled position, so it can rotate freely on the striker which facilitates the progress of the spiral and allows to define a rocket whose striker is fixed in rotation.
- FIGS. 4 and 5 show an alternative embodiment which does not differ from the mode described with reference to FIGS. 2 and 3 as by the orientation of the strip 9.
- the strip 9 is wound on the rod 2b of striker 2 with its grooves 10 oriented towards inside ie towards the striker.
- the material of the strip can advantageously be chosen as it undergoes by the action of centrifugal force plastic deformation allowing it to remain in the unlocking position shown in Figures 3 and 5.
- Figure 6 shows in cross section and position security a second embodiment of the invention.
- the rod 2b of the striker 2 a a hexagonal section.
- Band 9 has grooves 10 which are oriented inward, i.e. towards the rod 2b of the striker, and which are arranged opposite the edges of the hexagon.
- the different grooves 10 are produced on the strip 9 with a variable pitch which allows the winding of the band 9 around the rod 2b.
- the pitch of the grooves is constant for the six first grooves which allows the winding of a first layer of tape around the six sides of the rod of the striker. Then the pitch increases for the six grooves following values proportional to the thickness of the strip 9, thus authorizing the winding of a second layer of strip 9 around the hexagon formed by the first layer. The step then increases for the layers following.
- the total length of the strip is chosen as above so as to ensure overlapping of its ends when following the shot it is wound on the spiral spring by the action of centrifugal force.
- Such an embodiment allows like the previous one ensure good retention of the spiral spring due to the contact of the smooth face of the strip on this one.
- the striker will be mounted free in rotation in the rocket so as to facilitate the unwinding hairspring.
- a good winding also avoids misalignments of the strip and the striker likely to cause unbalanced which affect the proper functioning of the rocket.
- the hairspring is wound when the device is assembled also facilitated by the angular connection of the strip and the striker.
- This strip is wound four turns on a rod of hexagonal striker (face width 1.6mm) and receives a spiral spring 1m long.
- the ends of the strip overlaps with an arc of 100 ° angle in the center.
- variable pitch of the grooves will be chosen according to the number of faces of the polygon.
- Figure 7 shows schematically a step of manufacturing the flexible tape which is used in the embodiments Figures 2 to 5.
- the raw tape 91 is cut from a reel not represented. It goes between a knurled wheel 18 and a against pulley 19.
- the knurled wheel is made of steel, it is driven in the Z direction by a motor 20 and ensures both pulling the raw tape 91 and achieving on the latter grooves 10.
- the wheel 18 carries teeth 21 with a profile. triangular, the length of which is greater than or equal to the width of the strip 9 and the pitch of which determines the pitch of the splines 10.
- the counter pulley is freely mounted on bearings 22, the distance between the counter pulley and the knurled wheel is adjustable to adjust the depth of the grooves 10.
- the counter pulley 19 has a width greater than or equal to that of the band, it is covered with rubber to promote the training of the band and avoid any relative slip.
- the strip 9 on which the grooves 10 are made is then cut to the desired length using knives 23 whose known drive means are not not shown.
- This embodiment also makes it possible to give the band a camber directed towards the knurled wheel, which facilitates its subsequent winding on the striker.
- Figure 8 shows schematically a step of manufacturing the flexible strip which is used in the embodiment in Figure 6.
- the raw strip 91 passes between the knurled wheel 18 and the against pulley 19.
- the knurled wheel is still driven in the Z direction by a motor 20 and ensures the traction of the strip rough 91 and making the grooves 10.
- the counter pulley 19 is freely mounted on bearings 22, the distance between the counter pulley and the knurled wheel is still adjustable.
- the knurled wheel carries teeth 21 whose pitch is variable. She thus wears six first teeth 21a, relatively close together others and dismissed with a constant first step.
- first teeth are followed by six second teeth 21b, a little further apart from each other by a second constant step.
- the second teeth are finally followed by six thirds teeth 21c, further apart from one another by third constant step.
- the set of teeth 21a, 21b and 21c makes it possible to produce on the raw strip 91 grooves whose variable pitch authorizes the winding of the strip 9 on a hexagonal rod as previously described.
- the strip 9 is then cut to the desired length at knife medium 23.
- This hexagonal axis will preferably be constituted by the rod 2b of striker 2, rotated in the direction Z 'by a motor not shown.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Springs (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Description
- la figure 1 est une vue schématique en coupe axiale d'un dispositif de sécurité selon un premier mode de réalisation de l'invention, dispositif représenté en position de sécurité,
- la figure 2 est une vue en coupe transversale de ce dispositif selon un plan dont la trace est repérée par la ligne AA sur la figure 1,
- la figure 3 est une vue analogue à celle de la figure 2, le dispositif étant représenté en position déverrouillée,
- la figure 4 représente en coupe transversale et en position de sécurité une variante de réalisation du dispositif selon l'invention,
- la figure 5 représente cette variante de réalisation, le dispositif étant montré en position déverrouillée,
- la figure 6 est une vue en coupe transversale et en position de sécurité d'un deuxième mode de réalisation de l'invention,
- la figure 7 schématise une étape de fabrication de la bande souple utilisée dans le premier mode de réalisation de l'invention,
- la figure 8 schématise une étape de fabrication de la bande souple utilisée dans le deuxième mode de réalisation de l'invention.
Claims (10)
- Dispositif de sécurité destiné à verrouiller un percuteur pour une fusée de projectile giratoire, comprenant un ressort spiral (12) constitué par un ruban élastique enroulé sur lui-même et rappelé par son élasticité autour d'un organe de verrouillage qui maintient le percuteur (2) en position de sécurité, l'organe de verrouillage étant constitué par une bande souple (9) enroulée autour du percuteur (2) et dont le matériau ou la géométrie sont tels qu'elle n'exerce pas d'effort de rappel élastique vers le percuteur (2), caractérisé en ce que la bande présente une longueur telle que, lorsqu'elle se trouve lors du tir déroulée à la suite du ressort spiral (12) et appliquée contre celui-ci par l'action de la force centrifuge, ses extrémités (9a,9b) se recouvrent.
- Dispositif selon la revendication 1, caractérisé en ce que la bande souple comporte des cannelures (10).
- Dispositif selon la revendication 2, caractérisé en ce que les cannelures (10) sont orientées vers le percuteur (2).
- Dispositif selon une des revendications 1 à 3, caractérisé en ce que le percuteur est cylindrique.
- Dispositif selon la revendication 3, caractérisé en ce que les cannelures (10) ont un pas variable autorisant un enroulement de la bande (9) sur le percuteur suivant une figure polygonale.
- Dispositif selon la revendication 5, caractérisé en ce que le percuteur (2b) a une section polygonale, de préférence hexagonale, les cannelures (10) de la bande se positionnant lors son enroulement en regard des sommets du polygone.
- Dispositif selon une des revendications 1 à 6, caractérisé en ce que, une fois la bande déroulée à la suite du ressort spiral, ses extrémités se recouvrent sur un arc compris entre 60° et 180°.
- Procédé de fabrication d'un dispositif selon une des revendications 2 à 7, caractérisé en ce qu'il comporte une étape de réalisation des cannelures (10) de la bande par moletage d'une bande lisse entre une molette (18) et une contre poulie (19).
- Procédé selon la revendication 8, caractérisé en ce que le moletage est réalisé avec une molette (18) à pas variable.
- Procédé selon une des revendications 8 ou 9, caractérisé en ce que la bande est entraínée entre la molette et la contre poulie par la rotation d'un axe polygonal sur lequel la bande moletée (9) s'enroule, cet axe polygonal étant constitué par le percuteur (2b).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9315203 | 1993-12-17 | ||
FR9315203A FR2714169B1 (fr) | 1993-12-17 | 1993-12-17 | Dispositif de sécurité pour verrouiller un percuteur et procédé de fabrication de ce dispositif. |
PCT/FR1994/001356 WO1995016891A1 (fr) | 1993-12-17 | 1994-11-22 | Dispositif de securite pour verrouiller un percuteur et procede de fabrication de ce dispositif |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0685059A1 EP0685059A1 (fr) | 1995-12-06 |
EP0685059B1 true EP0685059B1 (fr) | 1998-09-09 |
Family
ID=9454047
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95902158A Expired - Lifetime EP0685059B1 (fr) | 1993-12-17 | 1994-11-22 | Dispositif de securite pour verrouiller un percuteur et procede de fabrication de ce dispositif |
Country Status (8)
Country | Link |
---|---|
US (1) | US5625161A (fr) |
EP (1) | EP0685059B1 (fr) |
AU (1) | AU678654B2 (fr) |
DE (1) | DE69413207T2 (fr) |
FR (1) | FR2714169B1 (fr) |
SG (1) | SG54298A1 (fr) |
TR (1) | TR27938A (fr) |
WO (1) | WO1995016891A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6564716B1 (en) * | 2001-12-05 | 2003-05-20 | Kdi Precision Products, Inc. | Fuzes having centrifugal arming lock for a munition |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US859610A (en) * | 1904-12-05 | 1907-07-09 | Bethlehem Steel Corp | Centrifugal percussive fuse for projectiles. |
DE1197786B (de) * | 1963-12-19 | 1965-07-29 | Junghans Geb Ag | Fliehspiralbandsicherung fuer Drallgeschosszuender, insbesondere fuer Zerlegerzuender |
US3516359A (en) * | 1968-01-25 | 1970-06-23 | Junghans Gmbh Geb | Centrifugal spiral band locking device,especially for self-destroying fuzes |
FR2429992A1 (fr) * | 1978-06-27 | 1980-01-25 | Diehl Gmbh & Co | Dispositif de securite a bande spirale centrifuge pour detonateur de projectile anime d'un mouvement giratoire |
FR2537265A1 (fr) * | 1982-12-07 | 1984-06-08 | Manurhin | Dispositif de securite a organes de verrouillage annulaires pour projectile giratoire |
DE3739368A1 (de) * | 1987-11-20 | 1989-06-01 | Dynamit Nobel Ag | Vorrohrsicherung an einem geschoss mit aufschlagzuender |
US5147974A (en) * | 1990-11-06 | 1992-09-15 | Motorola Inc. | Unwinding ribbon safing and arming device |
-
1993
- 1993-12-17 FR FR9315203A patent/FR2714169B1/fr not_active Expired - Fee Related
-
1994
- 1994-11-22 DE DE69413207T patent/DE69413207T2/de not_active Expired - Fee Related
- 1994-11-22 AU AU11114/95A patent/AU678654B2/en not_active Ceased
- 1994-11-22 SG SG1996007943A patent/SG54298A1/en unknown
- 1994-11-22 EP EP95902158A patent/EP0685059B1/fr not_active Expired - Lifetime
- 1994-11-22 US US08/491,871 patent/US5625161A/en not_active Expired - Fee Related
- 1994-11-22 WO PCT/FR1994/001356 patent/WO1995016891A1/fr active IP Right Grant
- 1994-12-13 TR TR01288/94A patent/TR27938A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
FR2714169B1 (fr) | 1996-02-09 |
DE69413207D1 (de) | 1998-10-15 |
US5625161A (en) | 1997-04-29 |
AU678654B2 (en) | 1997-06-05 |
TR27938A (tr) | 1995-10-26 |
WO1995016891A1 (fr) | 1995-06-22 |
FR2714169A1 (fr) | 1995-06-23 |
SG54298A1 (en) | 1998-11-16 |
AU1111495A (en) | 1995-07-03 |
EP0685059A1 (fr) | 1995-12-06 |
DE69413207T2 (de) | 1999-03-04 |
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