JP3901562B2 - Firing bullet locking device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a launching tube locking device that locks the movement of a projectile with respect to a launcher in a launcher for a ship that launches, for example, a chaff launching bullet or a flare launching bullet from a ship.
[0002]
[Prior art]
A ship such as an escort ship has a ship launcher that fires a chaff fire bullet, a flare fire bullet, and the like that defends a missile launched toward the ship by an electronic method.
[0003]
The ship launcher already filed as Japanese Patent Application No. 2001-091718 by the present applicant is configured to invert the launcher on the ship when the projectile is loaded and to load the launcher into the launcher from inside the ship. In this case, loading work on the deck becomes unnecessary, and the time required for loading can be greatly shortened.
[0004]
[Problems to be solved by the invention]
In such a launcher for a ship, it is necessary to lock the projectile bullet so that it does not fall out of the inverted launcher.
[0005]
However, since the shape of the head of the projectile differs depending on the type of the projectile, it is difficult to lock the head of the projectile and prevent it from coming off.
[0006]
The present invention has been made in view of the above problems, and provides a firing bullet locking device that locks a firing bullet regardless of the shape of the head of the firing bullet and can withstand the pressure in the firing barrel. The purpose is to do.
[0007]
[Means for Solving the Problems]
The first invention is applied to a firing bullet locking device that locks the movement of the firing bullet relative to the firing barrel.
[0008]
Then, a thin cylindrical metal deformation tube which faces the outer peripheral surface of the discharge bullet, and a pressure chamber formed on the outer side of the metal deformation tube, metal deformation tube thin cylindrical seat屈筒portion And an annular collar portion formed at both ends of the buckled tube portion. The buckled tube portion undergoes buckling deformation that swells inward by the pressure guided to the pressure chamber, and a large number of bulged portions are fired. It is characterized by being configured to be pressed against the outer peripheral surface of the bullet .
[0009]
According to a second invention, in the first invention, a pressure deformation restricting portion facing the outer peripheral surface of the metal deformation tube is provided.
[0011]
The third invention is characterized in that, in the first or second invention, the metal deformation tube is provided at a position closer to the launching port than the central portion of the firing tube.
[0012]
Operation and effect of the invention
According to the first invention, when a predetermined pressure is introduced into the pressure chamber, the deformable tube bulges inward, the bulging portion of the deformable tube is pressed against the outer peripheral surface of the projectile, and the projectile Lock.
[0013]
In this way, since the firing bullet locking device ties up the outer peripheral surface of the firing bullet, even if the type of the firing bullet is different, the firing bullet can be locked regardless of the head shape of the firing bullet.
[0014]
And it becomes possible to define a pressure chamber by metal deformation tube itself, and simplification of a structure is achieved. And by forming a deformation | transformation tube with a metal , the surface rigidity is ensured and sufficient durability is acquired.
[0015]
According to the second aspect of the present invention, the metal deformation tube is restricted from being deformed by the pressure in the firing cylinder that is generated at the time of launch when the metal deformation tube comes into contact with the pressure deformation restricting portion.
[0017]
According to the third aspect of the invention, the metal deformable tube is avoided from receiving the high pressure generated at the bottom of the launch tube, and can withstand the pressure in the launch tube.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0019]
As shown in FIG. 1, a reaction gun type launcher mounted on an escort ship or the like includes eight launchers 8 that launch projectiles on a ship, and a launcher device 2 that can change the orientation and elevation angle of the launcher 8. On the other hand, a loading device 9 for automatically loading the projectile 8 into the launch tube 8 is provided. As the projectile, for example, a chaff projectile, a long chaff projectile, an EJ projectile, an IR projectile can be selected. The bottom of the launch tube 8 is provided with a coil that ignites the propellant of the projectile bullet.
[0020]
The launcher device 2 includes a launcher turntable 4 that is supported so as to be turnable about a substantially vertical axis with respect to the hull. When launching, the launcher device 2 turns the launcher swivel 4 to change the direction in which each launcher 8 faces.
[0021]
The launcher device 2 includes a launcher hoisting stand 6 supported on the upper deck 1 so as to be rotatable about a substantially horizontal axis with respect to the launcher swivel base 4. It is fixed so that it is arranged in two rows at equal intervals. The launcher device 2 changes the elevation angle of each launcher 8 by rotating the launcher-elevating platform 6 during launching.
[0022]
Each firing tube 8 is provided with a firing bullet locking device 30 for holding the loaded bullet.
[0023]
The loading device 9 provided in the ship includes two magazines 21 for storing the projectiles on the same axis as the respective launch tubes 8, a loading mechanism 25 for loading the projectiles stored in each magazine 21 into the launch tube 8, and A slide mechanism 22 is provided that moves in a substantially horizontal direction between a loading position for loading each magazine 21 via the loading mechanism 25 into the firing cylinder 8 and a storage position for storing the bullet in the magazine 21.
[0024]
Hereinafter, the operations of storing, loading, and firing each projectile will be described.
[0025]
First, at the time of storage, the projectile is stored in the storage cylinder 20 according to the following procedure.
-Operate a switch (not shown) to slide the magazine 21 to the storage position.
A predetermined projectile bullet is stored in each storage cylinder 20 via the storage auxiliary tool 24.
[0026]
Next, at the time of loading, the firing bullet of the storage cylinder 20 is loaded into the firing cylinder 8 according to the following procedure.
The magazine 21 slides and moves to a predetermined loading position.
-The launcher turntable 4 turns to a predetermined loading position.
The launcher raising / lowering mechanism 7 operates to invert the launcher 8.
・ A slide hatch (not shown) opens.
The loading mechanism 25 raises the projectile bullet and loads it into the launch tube 8.
The firing bullet locking device 30 is activated to hold the firing bullet against the firing barrel 8.
When the loading of all the projectiles and the holding with respect to the launch tube 8 is completed, the slide hatch is closed.
-The launch tube 8 is raised and held at a predetermined angle, and the loading is completed.
[0027]
In addition, it is possible to take out the projectile bullet once loaded in the launch tube 8 through the storage tube 20 by performing the above-described operations at the time of storage and loading in reverse.
[0028]
Next, when launching each projectile bullet, the launcher swivel base 4 and the supine table 6 are held in the set direction, and the projectile bullets are fired from the selected launcher 8.
[0029]
The launcher is configured as described above, and the loading device 9 automatically loads the projectiles into the projectile 8 from the ship. Therefore, it is not necessary to load the projectiles 8 into the projectile 8 on the deck 1 and is required for loading. Time can be greatly reduced.
[0030]
By the way, the projectile has a cylindrical tube portion 11, and the propellant is stored at the base end of the tube portion 11, and has a head at the tip of the tube portion 11. Since the head shape of the projecting bullet 10 (see FIG. 2) differs depending on the type, it is difficult for the projecting bullet locking device 30 to lock the head of the projecting bullet 10 and prevent it from coming off.
[0031]
In order to cope with this, the present invention has a structure in which the firing tube locking device 30 locks the cylindrical tube portion 11 of the projecting bullet 10 and can withstand the pressure in the firing tube 8.
[0032]
As shown in FIG. 2, the firing bullet locking device 30 is provided to be located closer to the launching port 8 a than the center of the firing barrel 8. That is, the firing bullet locking device 30 is separated from the bottom of the firing tube 8 and is provided in the vicinity of the firing port 8a.
[0033]
As shown in FIG. 3, the firing bullet locking device 30 includes an outer block 31 fixed in the middle of the firing tube 8, a deformation tube 41 interposed in the outer block 31, and the outer block 31 and the deformation tube. 41 is provided with an inner block 51 interposed between 41 and a retainer 61 that is fastened to the open end of the outer block 31 to form the launch port 8a. The outer block 31 is a pressure-resistant strength member and forms the main body of the firing bullet locking device 30. The annular retainer 61 is fastened to the outer block 31 via a plurality of bolts 62, and fixes the inner block 51 between the outer block 31.
[0034]
The metal deformable tube 41 includes a thin cylindrical buckling tube portion 42 and annular collar portions 43 formed at both ends of the buckling tube portion 42 by machining. The buckling tube portion 42 has an inner diameter of about 130 mm, whereas its plate thickness t is, for example, about 0.8 mm. As the material of the deformable tube 41, for example, stainless steel, aluminum, or brass is used.
[0035]
A pressure chamber 44 is formed between the outer block 31 and the deformation tube 41, and the buckling deformation of the buckling tube portion 42 swells inward by the hydraulic pressure guided to the pressure chamber 44 to engage the tube portion 11 of the projectile bullet 10. It comes to stop.
[0036]
Two O-rings 45 are interposed between the flanges 43 of the outer block 31 and the deformation tube 41, and the pressure chamber 44 is sealed by the O-rings 45.
[0037]
Through holes 32 and 33 are formed in the outer block 31 as oil passages communicating with the pressure chamber 44. A high pressure from the hydraulic pump 35 and a low pressure from the tank 36 side are selectively guided to the pressure chamber 44 via the electromagnetic switching valve 34.
[0038]
The inner block 51 is divided into a semi-annular shape, and is interposed between the outer block 31 and the deformation tube 41. The inner peripheral surface of the inner block 51 is opposed to the buckled tube portion 42 as a pressure deformation restricting portion with a gap s. A through hole 52 is formed in the inner block 51, and the pressure chamber 44 and the through hole 32 communicate with each other through the through hole 52.
[0039]
Next, the operation of the fired bullet locking device 30 configured as described above will be described.
[0040]
When the discharge pressure of the hydraulic pump 35 is guided to the pressure chamber 44, the buckling tube portion 42 of the deformation tube 41 is elastically deformed inwardly by the hydraulic pressure of the pressure chamber 44, and then buckled and deformed in a vertical stripe shape. The bulging portion of the tubular portion 42 is pressed against the outer peripheral surface of the tubular portion 11, and the projecting bullet 10 is locked to the firing tube 8.
[0041]
At this time, the deformable tube 41 can be pressurized until a large number of vertical stripes are generated in the buckled tube portion 42. The difference between the buckling pressure and the pressure at the time of elastic deformation at the time of contact becomes an effective pressure ΔP, and the projectile 10 is compressed. This effective pressure ΔP slightly decreases due to the rigidity of the projectile 10. The product of the effective pressure ΔP and the effective area A of the deformation tube 41 is the contact force F.
[0042]
For example, if the pressure during elastic deformation is 20 kgf / cm 2 and the pressure during buckling deformation is 50 kgf / cm 2, the effective pressure ΔP is calculated by the following equation.
ΔP≈ (50−20) × 0.8 = 24 kgf / cm 2 (1)
When the inner diameter of the deformed tube 41 is 13.12 cm and the effective buckling length is 3.0 cm, the effective area A is calculated by the following equation.
A≈13.12 × (π / 4) × 3.0 = 404 cm 2 (2)
The total contact force F is calculated by the following formula.
F = ΔP × A≈9700 kgf (3)
When the friction coefficient μ between the deformation tube 41 and the projecting bullet 10 is 0.2, the locking force Fs is calculated by the following equation.
Fs = F · μ = 1940 kgf (4)
Therefore, the locking force Fs can be about 2000 kgf, and the fired bullet 10 can be sufficiently locked.
[0043]
On the other hand, when the tank pressure is guided to the pressure chamber 44, the buckled tube portion 42 of the deformable tube 41 returns to its original shape, and the locking of the projecting bullet 10 is released. At the time of launch, when the propellant of the projectile 10 is ignited in this released state, the projectile 10 is launched from the launch tube 8.
[0044]
FIG. 4 shows the pressure distribution generated in the launch tube 8 during launch. The vicinity of the launch port 8a where the firing bullet locking device 30 is provided is lower than the bottom, and a pressure of about 30 kgf / cm ² acts on the deformation tube 41. The deformation tube 41 tends to bulge outward in response to the pressure at the time of firing, but when the deformation tube 41 contacts the inner block 51, further deformation is stopped and the shape of the inner wall surface of the firing tube 8 is maintained. Is done. As a result, it is avoided that the deformation of the deformation tube 41 hinders the firing of the projectile 10.
[0045]
Since the deformation tube 41 itself defines the pressure chamber 44, the structure can be simplified. And by forming the deformation tube 41 with a metal, the surface rigidity is ensured and sufficient durability is obtained.
[0046]
Next, reference examples shown in FIGS. 5 and 6 will be described. In addition, the same code | symbol is attached | subjected to the same component as the said embodiment.
[0047]
The firing bullet locking device 30 includes a metal deformable tube 71 that secures the tubular portion 11 of the projectile bullet 10, and a resin securing tube 81 that tightens the deformable tube 71 by pressure guided to the pressure chamber 44. Is provided.
[0048]
The metal deformable tube 71 has a longitudinal groove 72 with a predetermined width formed along the axial direction, and is tightened by the lashing tube 81 to reduce the opening width of the longitudinal groove 72 to reduce the diameter. ing.
[0049]
Cylindrical spacers 73 and 74 are provided side by side with the deformation tube 71 in the axial direction. The deformed tube 71 is sandwiched between cylindrical spacers 73 and 74 at both ends.
[0050]
The lashing tube 81 is formed by machining into a cylindrical shape using MC nylon, and a pressure chamber 44 is formed between the tying tube 81 and the outer block 31.
[0051]
Two O-rings 45 are interposed between the outer block 31 and the securing tube 81, and the pressure chamber 44 is sealed by the O-rings 45.
[0052]
When the discharge pressure from the hydraulic pump 35 is guided to the pressure chamber 44, the lashing tube 81 tightens the deformation tube 71, and the inner peripheral surface of the deformation tube 71 is pressed against the outer peripheral surface of the cylindrical portion 11 of the projecting bullet 10. The projecting bullet 10 is locked to the cylinder 8.
[0053]
By forming the deformable tube 71 from metal, the surface rigidity is ensured and sufficient durability is obtained.
[0054]
By deforming the deformable tube 71 by expanding and contracting the opening width of the longitudinally split groove 72, it becomes possible to increase the amount of deformation of the inner peripheral surface thereof, and the fired bullet 10 can be reliably locked. The deformation tube 71 can secure a deformation amount of about 1%. For example, when the inner diameter is about 100 mm, a deformation amount of about 1 mm can be secured.
[0055]
As another reference example, as shown in FIG. 7, the longitudinal groove 72 may be formed to be inclined with respect to the axial direction of the deformable tube 71.
[0056]
In this case, the deformation tube 71 is deformed while keeping its cross section circular, so that the deformation amount of the inner peripheral surface can be increased, and even when the cylindrical portion 11 of the projecting bullet 10 is formed of a resin material. The fire bullet 10 can be reliably locked.
[0057]
As another reference example, as shown in FIG. 8, the securing tube 82 may be formed into a cylindrical shape by using a fluororesin as a material. A lip 83 that contacts the outer block 31 is integrally formed, and the pressure chamber 44 is sealed.
[0058]
In this case, by forming the tying tube 82 with a fluororesin, heat resistance and durability can be improved, and the structure can be simplified by eliminating the O-ring.
[0059]
The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.
[Brief description of the drawings]
FIG. 1 is a perspective view of a ship launcher showing an embodiment of the present invention.
FIG. 2 is a sectional view of the launcher.
FIG. 3 is a cross-sectional view of the firing bullet locking device.
FIG. 4 is a diagram showing the pressure distribution generated in the launcher.
FIG. 5 is a cross-sectional view of a firing bullet locking device showing a reference example .
FIG. 6 is a perspective view of a deformed tube and the like.
FIG. 7 is a perspective view of a modified tube or the like showing still another reference example .
FIG. 8 is a cross-sectional view of a fired bullet locking device showing still another reference example .
[Explanation of symbols]
2 Launcher device 8 Firing tube 9 Loading device 10 Firing bullet 20 Storage tube 30 Firing tube locking device 41 Deformation tube 42 Buckling tube portion 44 Pressure chamber 51 Inner block (pressure deformation regulating portion)

Claims (3)

In the projecting bullet locking device for locking the movement of the projecting bullet with respect to the projecting tube, a cylindrical metal deformation tube facing the outer peripheral surface of the projecting bullet, and a pressure chamber formed outside the metal deformation tube with the door, and the metal deformation tube thin cylindrical seat屈筒portion, and a flange portion of the annular formed at both ends of the seat屈筒portion, the seat屈筒section in the pressure chamber A projecting bullet locking device characterized in that a large number of bulging portions are pressed against the outer peripheral surface of the projecting bullet by being buckled and deformed inwardly by the pressure introduced . The firing bullet locking device according to claim 1 , further comprising a pressure deformation restricting portion facing the outer peripheral surface of the metal deformation tube. The firing bullet locking device according to claim 1 or 2 , wherein the metal deformable tube is provided at a position closer to the launching port than a central portion of the firing barrel.

Images