JP2005180919A - Blank ammunition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blank ammunition, the shell of which is divided and crushed in shooting as smaller broken pieces with a narrowed flying range of the broken pieces, and which can be continuously shot and is easily biodegradable. <P>SOLUTION: This blank ammunition comprises a cap, a cartridge containing a firing agent and a shooting agent, and a point part. The point part has a shell molded of a biodegradable resin, and a filler having a specific gravity of 1-10 and a maximum grain size of 3 mm or less is arranged in the inner part thereof. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an ammunition for empty packaging, and relates to an ammunition for empty packaging which is divided and crushed almost at the same time as it is fired from a gun, and which has a narrow flight range and which decomposes and disappears naturally in a natural environment.

Conventionally, shooting training is desired to have the same sound, smoke, light, and firing recoil as in actual combat.
However, due to the long range of bullets to be fired in actual bullets, it is difficult to secure a place for shooting training, and opportunities are limited.
Therefore, in shooting training, it is desirable to have ammunition that does not have any scattered matter from the muzzle, and if present, the scattered matter falls at a short distance from the muzzle.
Some of them are known as shooting training ammunition.
As an example, plastic is used for the bullet shell, a shaft-shaped groove is formed on the outer periphery of the bullet shell, and a pellet-shaped (tablet-shaped) mass formed by pressing iron powder or the like in the cavity inside the bullet. Non-Patent Document 1 discloses a shooting training bullet filled with a conditioning material.

These firing training bullets, when fired from a cannon that uses gas recoil, cut the bullet's bullet band by the crest of the cavity's cavity line, and the bullet band moves along the cavity line and pivots to the bullet ( Spin).
And the bullets that go out of the muzzle while spinning will be destroyed because the bullet's shell cannot maintain its shape due to the outward centrifugal force, but this bullet shell is not subdivided and becomes a flower-like mass Remain.
In addition, plastic is used as a material for forming the shell itself.
Usually, nylon or polyethylene is used in terms of strength.
As another example, Patent Document 1 discloses a bullet made of an explosive material that is ignited, detonated and gasified.

As another example, Patent Document 2 discloses a bullet (destructive consumable for military exercises) in which a biodegradable plastic is used for a bullet shell, and a gunpowder filled with explosives upon landing. Has been.
The bullet shell material is formed of gluten biodegradable plastic, and the bullet shell is filled with powder for adjusting the weight or powder for landing display together with the explosive.
As another example, there is a bullet for a small gun (5.56 mm to 12.7 mm) called a paper bundle.
As another example, Patent Document 3 discloses a pistol bullet made of a biodegradable plastic.
As another example, Patent Document 4 discloses a split crushing type non-chemical empty packaging lid stopper configured to be loaded at the boundary between a chamber and a gun cavity.
This lid stopper seals the gas pressure at the time of launch by the operation of the propellant in the chamber, and there is no generation of large chunks when divided and crushed by this gas pressure.
US Pat. No. 5,907,121 JP-A-9-89500 Japanese Patent Laid-Open No. 6-213597 JP-A-8-320200 Handbook Weaponry (published by Line Metal), Break-up Ammunition catalog (NWM)

First, the method of destroying bullet shells with the centrifugal force of bullet spin is usually to groove the shell (outer surface or inner surface) in order to ensure the destruction, but in order to reduce the scattering range due to the scattered matter It is necessary to make the shell debris smaller. And the magnitude | size of a fragment is decided by the space | interval of this groove | channel.
However, in order to ensure bullet strength, there is a limit to the number of grooves in terms of strength (handling, on the feed bullet system in the cannon), so there is a limit to reducing the size of the fragments, and there is a large flower-like shape. It remains as a lump.
Since the shell material is plastic, and nylon or polyethylene is usually used from the viewpoint of strength, these do not corrode and disappear in the natural environment, and there is a risk that they will remain forever and cause environmental problems.

Next, in the bullet method using explosive materials, the bullet material ignites, detonates, and gasifies in the gun barrel, so there are almost no scattered objects, but the gun's life is shortened due to burning inside the gun barrel. There is a risk of becoming. Also, if there is no deflagration, there is a risk of a flight distance equivalent to that of a real bullet.
Next, in a bullet shell made of gluten biodegradable plastic and a bullet filled with gunpowder, it is fired from the gun, then flies to the target target, hits the target, and is crushed by the gunpowder in the shell Therefore, problems such as flying distance problems and training conditions occur, and the training location and the like are specified.
Next, the paper bundles for rifles are made of paper or corrugated paper and are light in weight. Even if they are used as they are for small and medium caliber empty packages, the reaction force similar to that of actual bullets can be obtained. It was impossible to fire continuously. In addition, because it differs in shape from the actual bullet, handling and loading training as when using the actual bullet could not be adopted.

Next, pistol bullets using biodegradable plastics are resistant to impacts, so they are difficult to be divided and crushed, and the distance of the fragments is long, and the weight of the bullets is light, making continuous shooting impossible.
Next, the lid for non-medicine packaging is used for a separation loading bullet having a large diameter such as 155 mm, and the propellant is loaded after loading the lid.
This is because the bullet and the launcher are completely separated, and the mass equivalent to a real bullet is obtained, such as a type of machine gun that uses gas reaction to continuously fire (uses 25mm bullets, 35mm bullets, etc.) Since it is not configured to shoot continuously at high speed, it is impossible to stably perform continuous shooting at high speed by obtaining a predetermined cavity pressure.

  The present invention has been made to solve such conventional problems, and its purpose is to divide and crush bullets at the time of shooting, to break the fragments into small pieces, and to narrow the flying range of the small pieces, enabling continuous fire It is an object to provide an ammunition for empty packaging that is easy to biodegrade.

According to a first aspect of the present invention, there is provided an empty packaging ammunition comprising a detonator, an igniting agent and a propellant, and an outer shell portion of the warhead portion formed of a biodegradable resin, It is an ammunition for empty packaging characterized by comprising a filler having a specific gravity of 1 to 10 and a maximum particle size of 3 mm or less.
In the first aspect of the invention, a hollow portion is formed inside the outer shell portion, and a filler is provided therein to obtain a mass equivalent to a real bullet, and at the same time contribute to the split crushing of the outer shell portion.
The warhead is composed of a bullet bottom portion and a shell portion, and the inner cross-sectional shape of the bullet bottom portion may be, for example, a semicircular shape, a semi-elliptical shape, a trapezoidal shape, or the like, and a filler can be disposed. .
When the warhead heads out of the muzzle while accelerating the inside of the gun cavity due to the gas pressure, the filling material becomes dusty and scatters and falls.
In addition, since it is formed of a biodegradable resin, it is naturally decomposed in a natural environment (for example, on the ground) after use, and its shape disappears.

A second invention is the ammunition for empty packaging according to claim 1, wherein a part of the filling material is a cushioning material.
In the second aspect of the invention, the filler and the cushioning material are provided in the hollow portion of the bullet shell, but the cushioning material can fill the gap between the fillers and is filled during the feeding bullet. Mitigates the impact of objects moving through the shell and colliding with the shell.
The bullet head is composed of a bullet shell portion and a bullet bottom portion, and the filling material can be arranged with the internal cross-sectional shape of the bullet bottom portion being, for example, semicircular, semi-elliptical, trapezoidal, etc. .
According to a third aspect of the present invention, in the ammunition for empty packaging according to claim 1 or 2, the bullet head has an outer bottom surface, an outer shell outer periphery, or an inner shell inner periphery at one or more locations. An ammunition for empty packaging characterized by being provided with a slit.
In 3rd invention, the provided slit becomes a starting point of a crack, and a warhead is divided and crushed.
Also, when going out of the cannon of the machine gun with gas pressure, the outer circumference of the shell or the inside of the shell A slit provided in the inner periphery becomes the starting point of cracking, and the shell portion is divided and crushed.

According to a fourth aspect of the invention, there is provided the ammunition for empty packaging according to any one of claims 1 to 3, wherein the shell portion is broken before the bullet bottom portion is broken and separated by the firing retreating force of the filler. An empty-packed ammunition characterized in that a destruction region that causes destruction on the side surface of the tail portion of the shell portion is formed on the inner surface of the bottom portion.
In the fourth invention, a recess is formed in the inside of the bottom of the bullet in order to cause destruction on the side surface of the tail of the bullet shell by the retreating force of the filling.
Further, the filler can apply pressure to the bottom surface and the side surface of the bottom portion, and can crack from the bottom surface to the side surface of the bottom portion.
According to a fifth aspect of the present invention, there is provided an ammunition for empty packaging according to claim 4, wherein the inner surface of the bottom of the bullet bottom is formed in a semicircular shape in the concave section.
In the fifth invention, the bullet head has a conical shape similar to that of an actual bullet, but its bullet bottom is cylindrical, and the concave shape of the inner surface (inside) of this bullet bottom is hemispherical.

(1) Since the flight range of the warhead fragments divided and crushed during shooting is narrow, safety is high.
(2) It has a shape and mass equivalent to a real bullet and can be fired continuously with a cannon.
(3) Since continuous shooting is possible, the same handling, loading, and shooting training as in the case of live ammunition are possible.
(4) Since the warhead is divided, shredded, fragmented and dropped at a distance close to the muzzle, safety in shooting training (in practice) is ensured, and the selection range of training locations is expanded.
(5) Since the warhead is formed of a biodegradable resin mixed with an additive, after use, it naturally decomposes in a natural environment (for example, the ground) and the shape disappears.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a warhead 10 of empty ammunition according to the first embodiment of the present invention.
The bullet head 10 is composed of a bullet shell portion 11 made of a biodegradable resin and a filler 12 filled therein.
As the biodegradable resin, any biodegradable resin that naturally decomposes under normal environmental conditions in which oxygen, moisture, microorganisms, and the like are present can be used. However, a biodegradable resin having better biodegradability is preferable. . Further, among them, those having a melting point of 90 ° C. or more are more preferable. Here, when the melting point is 90 ° C. or higher, since the inside of the gun is overheated, such as a machine gun, the warhead 10 is naturally deformed because it is expected to be hotter than the atmospheric environment. This is a condition for preventing damage.
Here, “good biodegradability” means that the degradation rate is 90% or more in 40 days under the composting conditions according to the standard of ASTM-D5333892.
Specifically, for example, polylactic acid-based lacti (manufactured by Shimadzu Corporation), aliphatic polyester-based bionore (manufactured by Showa Polymer Co., Ltd.), polylactic acid bacteria-based lacia (manufactured by Mitsui Chemicals, Inc.) ), Cell Green (manufactured by Daicel Chemical Industries, Ltd.), Bio Green (manufactured by Mitsubishi Gas Chemical Co., Ltd.), Eco Plastic (manufactured by Cargill Japan), Lunar (manufactured by Nippon Shokubai Co., Ltd.), Poval (Kuraray ( Co., Ltd.), Evercorn (manufactured by Nippon Corn Starch Co., Ltd.), starch-based corn pole (manufactured by Nippon Corn Starch Co., Ltd.), Delon CC (manufactured by Aicero Chemical Co., Ltd.), Novon (manufactured by Chisso Corporation), Matterby (Nippon Synthetic Chemical Industry Co., Ltd.), starch-based Placon (Nippon Food Processing Co., Ltd.), and the like.

The filler 12 includes those having a specific gravity of 1 to 10 and a maximum particle size of 3 mm or less, preferably a temporary specific gravity of 3.5 or more and a particle size of 200 μm or less. Those having no property are preferred.
Specific examples are iron, zinc, and tungsten, and iron, zinc, tungsten, and the like having a particle diameter of 10 to 100 μm are preferable in order to obtain convenience during production and good splitting and crushing conditions.
The thickness of the shell portion 11 is usually 2% to 20% of the caliber of the gun, and is preferably 5% or more of the caliber of the gun in order to ensure strength against handling, transportation, and loading impact. Further, in order to secure a weight for obtaining a recoil amount effective for continuous fire and to obtain a good split crushing condition, it is preferably 20% or less of the caliber of the gun.
The thickness of the bullet bottom portion 13 of the shell portion 11 is not particularly limited because it needs to be strong enough to withstand the pressure inside the gun cavity, but is usually 15% to 25% of the caliber of the gun. In order to obtain the situation, the bullet bottom 13 having a structure as shown in FIG. 2 is preferable. More preferably, a slit 14 is formed in the bullet bottom 13 as shown in FIG.

In order to enable the molding of the bullet shell part 11 in the bullet head 10, the bullet shell part 11 is divided into units, and a biodegradable resin heated and melted in a mold corresponding to each unit is injection molded. Are fitted to produce the shell portion 11. Then, it is performed by filling or compressing metal powder inside.
More specifically, in order to produce the shell portion 11 having the structure as shown in FIG. 1, for example, a method of combining the three units (tip portion 16, body portion 17, bullet bottom portion 13) shown in FIG. There is.
In order to produce each unit (tip 16, body part 17, bullet bottom 13), a mold for each unit is produced, and biodegradable resin heated and melted therein is injection-molded. After combining the front end portion 16 and the body portion 17, the inner hollow portion is filled with the filler 12, and the bullet bottom portion 13 is bonded via an adhesive.

Further, in order to produce the shell portion 11 having the structure as shown in FIG. 1, for example, there is a method of combining the three units (tip portion 16a, trunk portion 17a, bullet bottom portion 13a) shown in FIG.
In this case, as the filler 12a, for example, a mixture of tungsten and sand at an arbitrary ratio is used.
If the mass of the filler 12 is high, the force of the setback (retreating force) G is large, so it is necessary to make the shell part 11 have a predetermined strength. However, when the strength of the shell portion 11 is high, it is not easy to divide and crush it completely into a short distance from the muzzle, so that biodegradability that has the property of brittleness (low elongation) is also included. Resin is required (in order to reduce elongation, the amount of filler mixed is adjusted).
In addition, when the tensile force is applied to an object, the elongation according to the tensile force generally occurs in the object. And the ratio of the dimension extended by tensile force with respect to the original length (before applying tensile force) of an object is shown with%.

FIG. 6 shows an empty packet ammunition 20 according to the second embodiment of the present invention.
The empty packet ammunition 20 according to the present embodiment includes a drug cartridge 21 and a warhead 22. As shown in FIG. 7, the bullet head 22 includes a bullet shell main body 23 having a conical tip and a bullet bottom 24 having a closing portion 25. The shell portion main body 23 and the bullet bottom portion 24 are formed of a biodegradable resin.
The shell body 23 forms a bullet band 26 closer to the bullet bottom 24. Further, the bullet shell main body 23 is formed with a cavity 27 having a closed end portion 27a over its entire length. A filler 28 is disposed in the cavity 27. The filler 28 is composed of buffer paper (for example, tissue paper) 28a, iron powder (for example, an average particle diameter of 80 μm) 28b, iron powder pellets (for example, two cylindrical iron powder pellets) 28c, iron powder (for example, from the tip) , Average particle diameter 80 μm) 28d.
At that time, an epoxy-based adhesive is applied to the outer periphery of the cylindrical iron powder pellet 28c (side surface in contact with the inner wall of the cavity 27). This is mainly because the cylindrical iron powder pellet 28c moves or collapses inside the bullet due to an impact when the ammunition is loaded into the cannon, and the bullet is not damaged.
Since the buffer paper 28a is elastic, even if a gap is generated by changing the iron powder density during transportation or storage by inserting the buffer paper 28a, the gap can be filled.
The shock-absorbing paper 28a is an operation when the ammunition 20 is loaded in the cannon, and the shock when the iron powder 28b moves inside the shell portion 22 is mitigated.
Needless to say, since the buffer paper 28a is light and elastic, it can be used even when a gap is generated due to the mass of iron powder or the like to be filled.
As the buffer material 28a, cork and foamable resin (for example, foamed polystyrene, foamed polyurethane, foamed polyethylene, etc.) can be used in addition to paper.

Here, after filling the filler, the bullet bottom portion 24 is inserted and bonded and fixed to complete the basic bullet shell portion 22.
As the iron powder pellet 28c, in addition to pellets, iron powder press-molded into a tablet shape may be used. Here, the tablet shape refers to a tablet shape, and refers to a small disk shape that can be swallowed as a pill.
The case where the filler 28 is filled with the buffer paper 28a, the iron powder 28b, the iron powder pellet 28c, and the iron powder 28d in this order from the tip has been described. However, the buffer paper 28a, the iron powder pellet 28c, the iron powder 28b, and the iron powder from the tip. The pellet 28c and the iron powder 28d may be filled in order, or the buffer paper 28a, the iron powder pellet 28c, and the iron powder 28d may be filled in order from the tip.
The bullet bottom portion 24 has a diameter such that the flange portion 29 a is slightly smaller than the trunk portion of the bullet head 22, and the insertion portion 29 b can be inserted into the trunk portion of the bullet shell body 23.
The bullet bottom 24 is fixed to the opening 23a of the bullet shell main body 23 via an epoxy adhesive. The inner surface cross section of the bullet bottom 24 forms a substantially semicircular recess 24a.

Next, in the 35 mm-diameter warhead 22 of the present embodiment, the mass of the shell portion (which is filled with the filler) and the amount of propellant (related to the gas pressure) are set as the reference (100%), respectively. The cavity pressure data when the dose is reduced are shown in Table 1.

From this table, it can be seen that when at least one of the warhead mass and the amount of the propellant decreases, the cavity pressure decreases.
Further, the minimum cavity pressure required for the cannon to move its delivery bullet system differs depending on the type of the cannon, and the combination of the warhead mass and the amount of the projectile can be set based on data such as Table 1. .
In the present embodiment, the inside cross section of the bullet bottom 24 is formed in a semicircular recess 24a (in this case, the bullet bottom is cylindrical, so that the inside recess is a hemisphere). The shape is not limited to the semicircular shape, and a semi-elliptical shape, a conical shape, a trapezoidal shape, and the like are possible.

Next, the operation of the empty packet ammunition 20 according to the present embodiment will be described.
The empty ammunition 20 is loaded into the chamber of a cannon (fire gun), and the detonator 21a provided at the bottom of the gun canister 21 is ignited with a firing pin to transmit to the igniting agent and propellant. The bullet head 22 is fired.
After the bullet head is fired, the cartridge portion 21 is automatically discharged from the gun by the feeding bullet system.
Then, the next bullet is delivered with the gas pressure generated in the chamber when the ammunition is fired, and the bullet head 22 goes out of the gun cavity with the gas pressure. At that time, the elastic band 26 is released while spinning (rotating) along the cavity line in the cannon cavity.
At this time, the bullet head 22 is crushed in the axial direction by the setback G (retraction force) at the time of launch, and the bullet shell body 23 is broken.
When the warhead 22 is in the canal, it needs to secure gas pressure for delivering the next bullet, so it moves as a lump object with a constant mass and exits from the muzzle. Completely crush and shred.
The fragmented warhead 22 is a piece having a width of approximately 10 mm × 40 mm at most, so it is rapidly decelerated by air resistance and falls at a distance close to the muzzle.
The filling 28 inside the warhead 22 is in the form of dust together with the warhead 22 that is completely fragmented within a short distance from the muzzle while the warhead 22 accelerates in the gun cavity due to gas pressure. Fall and fall.
At this time, since the iron powder pellets 28c are sandwiched between the iron powders 28b and 28d in order to increase the internal density, when the pressure resistance of the shell portion main body 23 starts to weaken at the time of launch, the iron powder pellets 28c Since the powder is retracted while pressing the powder, non-uniform strain is applied to the iron powder pellet 28c itself, the iron powder pellet 28c collapses and becomes powder when it goes out of the muzzle.

The filler 28 begins to crush the bullet bottom 24 of the bullet head 22 with a setback (retreating force) G when the bullet is fired.
At this time, since the cross-sectional shape of the inner bottom surface of the bullet bottom portion 24 is substantially semicircular, the filler 28 applies pressure to the bottom surface 25 and the side surface 24b and completely breaks from the bottom surface 25 to the side surface 24b of the bullet bottom portion 24.
When the shell part falls into a short distance from the muzzle, the filler 28 is, for example, iron powder, and disappears in the natural environment, and the shell part 22 is a biodegradable resin. Decomposes and disappears by microorganisms.

FIG. 8 shows an empty packet ammunition 30 according to the third embodiment of the present invention.
The empty packet ammunition 30 according to the present embodiment is provided with a plurality of slits 32 and 33 having a width of 1 mm and a depth of 2 mm in the longitudinal direction on the surface of the warhead 31. The bullet head 31 is formed in a conical shape (a shape corresponding to an actual bullet) having an outer diameter of the trunk portion of 35 mm, a length of 175 mm, and a thickness of 3 mm.
As shown in FIGS. 8 and 9, eight slits 32 are provided at equal intervals on the surface of the tip 31a1 of the bullet shell main body 31a. The slit 32 is about 50 mm from the vicinity of the beginning of the bullet shell body 31a2 forming the conical shape of the bullet shell body 31a to the tip 31a1.
As shown in FIG. 8, eight slits 33 are provided in the bullet shell body 31a2 of the bullet shell body 31a at equal intervals. The slit 33 is about 70 mm from the bullet band 36 to the vicinity of the conical boundary.
The bullet head 31 of the empty packet ammunition 30 according to this embodiment may be any structure of the empty packet ammunition 10 shown in FIG. 1 and the empty packet ammunition 20 shown in FIG.
In this embodiment, the case where eight slits 32 and 33 having a width of 1 mm and a depth of 2 mm are provided has been described. However, the groove width, groove depth, length, number, location, and the like of the slits 32 and 33 are mass adjusted. It is preferable to select appropriately from the type of the filler (density is important), the outer diameter of the body, and the like.
Moreover, although this embodiment demonstrated the case where a slit was formed in a bullet shell part surface, you may form a slit in a bullet shell part inner surface.

Next, the operation of the empty packet ammunition 30 according to the present embodiment will be described.
An empty ammunition 30 is loaded into a chamber of a cannon (firearm), and a detonator 37 provided at the bottom of the shell 35 is ignited by a firing needle to transmit to an ignition powder and a propellant. Fire the shell.
The cartridge portion 35 is automatically ejected from the gun by the feeding bullet system after the bullet is fired.
Then, the next bullet is delivered with the gas pressure generated in the chamber when the ammunition is fired, and the bullet head 31 goes out of the gun cavity with the gas pressure. At that time, the bullet band 36 starts to crack from the slits 32 and 33 provided on the outer peripheral side surface and the bottom surface of the bullet head 31 while spinning (rotating) along the cavity line in the gun cavity.
At this time, the bullet head 31 is crushed in the axial direction by the setback G (retreating force) at the time of launch, and the bullet shell main body 31a is cracked, but the slits 32 and 33 are the starting points of the crack.
When the warhead 31 is in the canal, it needs to secure gas pressure for delivering the next bullet, so it moves in the cannon as a lump of object with a constant mass and exits from the muzzle. Completely crush and shred.
The fragmented warhead 31 is a piece having a width of approximately 10 mm × 40 mm at most, so it is rapidly decelerated by air resistance and falls at a distance close to the muzzle.

FIG. 10 shows a bullet bottom 40 used in any of the bullet head 10 and the empty ammunition 20, 30 according to the first to third embodiments of the present invention.
In the bullet bottom portion 40, a flange portion 41 and an insertion portion 44 are integrally formed, and eight slits 43 are formed on the outer bottom surface portion 42 of the flange portion 41 at equal intervals.
FIG. 11 shows a bullet bottom 50 used for either the warhead 10 or the empty ammunition 20 or 30 according to the first to third embodiments of the present invention.
The bullet bottom portion 50 has a flange portion 51 and an insertion portion 52, and the inner cross section of the insertion portion 52 is formed into a concave portion 53 having a substantially semicircular shape in the bottom surface direction.
Here, the arrow represents a state in which a filling (iron powder or the like) is applied in the direction of the bottom surface 54 and the side surface 55 by the setback (retreating force) G at the time of launch.
Note that the present invention can be applied from conventional rifle empty ammunition to large caliber empty ammunition.

Hereinafter, the present invention will be described in more detail with reference to examples.
(Example 1)
Each part as shown in FIG. 4 was produced, and the warhead 10A was produced by combining them with a filler. Bionore (biodegradable resin manufactured by Showa Polymer Co., Ltd.) is used as the biodegradable resin, and tungsten (temporary specific gravity 5.9) and sand (temporary specific gravity) are mixed in any proportion as the filler 12 The weight was 75 g and 105 g.
An ammunition was filled with a predetermined propellant, a warhead 10A was installed, an ammunition for empty packaging was produced, and a shooting test was conducted with a 25 mm cannon.
The crushing state of the warhead 10A was confirmed by installing a chip board with a length of 1 x 1.8 m and a thickness of 1 mm at a position 5 m in front of the muzzle, and checking the hole diameter and the number of holes in the chip board.
As a result, judging from the situation of the chipboard placed at a point of 5 m, it was found that the size of the maximum fragment was 3.0 cm × 1.5 cm and was divided into about 300 small pieces.
Next, as a result of conducting a shooting test with a chipboard placed at a 50m point, judging from the situation of the chipboard, in any case, the chipboard is intact, so the power to penetrate the chipboard 50m ahead is It was confirmed that it did not remain.
It was confirmed that this ammunition could be fired continuously and that the body portion 17 of the warhead 10A was largely biodegraded in 12 months.

(Example 2)
An example in which the present invention is applied to an ammunition for empty packaging of a 35 mm cannon is shown.
Each baht as shown in FIG. 5 was produced, and the warhead 10B was produced by combining them with the filler 12a. Bionore (biodegradable resin manufactured by Showa High Polymer Co., Ltd.) is used as the biodegradable resin, and tungsten (temporary specific gravity 5.9) and sand (temporary specific gravity) are mixed in any proportion as the filler 12a. The weight was 380 g.
An ammunition was filled with a predetermined propellant, a warhead 10B was installed, an ammunition was prepared, and a shooting test was conducted.
As a result, judging from the situation of the chipboard placed at a point of 100 m, the size of the largest piece was 3.0 cm × 1.0 cm, and an average of one piece of dent was confirmed, but it flew 110 m or more. There was nothing.
It was confirmed that this ammunition could be fired continuously, and that the body portion 17a of the warhead 10B was largely biodegraded in 12 months.

It is sectional drawing which shows the warhead concerning 1st embodiment of this invention. It is sectional drawing which shows the bullet bottom part in the warhead of FIG. It is a bottom view which shows the bullet bottom part in the warhead of FIG. It is sectional drawing of the warhead of FIG. It is sectional drawing of the shell part of the warhead of FIG. It is a side view which shows the ammunition for empty packaging which concerns on 2nd embodiment of this invention. It is sectional drawing of the ammunition for empty packaging of FIG. It is a side view of the ammunition for empty packaging which concerns on 3rd embodiment of this invention. It is a bottom view which shows the bullet bottom part of FIG. It is a perspective view which shows the bullet bottom part used for 1st embodiment thru | or 3rd embodiment of this invention. It is sectional drawing which shows the bullet bottom part used for 1st embodiment thru | or 3rd embodiment of this invention.

Explanation of symbols

10, 10A, 10B, 22, 31 Warhead 11 Bullet shell 12, 12a, 28 Filling 13, 13a, 24, 40, 50 Bottom 14 Slit 15, 21, 35 Drug cartridge 16, 16a, 31a1 Tip 17 , 17a, 31a2 Body part 20, 30 Ammunition 23, 31a Shell body 24a, 53 Recess 25 Closure part 26, 36 Belt 27 Cavity 27a Tip part 28a Buffer paper 28b, 28d Iron powder 28c Iron powder pellet 29a , 41, 51 Gutter part 29b, 44, 52 Insertion part 32, 33, 43 Slit

Claims (5)

  In an empty-packed ammunition composed of a detonator, an igniting agent, and a propellant in its interior and a bullet head, the outer shell portion of the warhead is molded from a biodegradable resin and has a specific gravity of 1-10. An ammunition for empty packaging characterized by comprising a filler having a maximum particle size of 3 mm or less.   2. The ammunition for empty packaging according to claim 1, wherein a part of the filling is a cushioning material.   3. The empty packaging ammunition according to claim 1 or 2, wherein a slit is provided at any one or more of the bottom of the bullet bottom, the outer periphery of the bullet shell, or the inner periphery of the bullet shell of the bullet head. An ammunition for empty packaging.   The empty shell ammunition according to any one of claims 1 to 3, wherein the bullet shell portion is formed on a side surface of the tail portion of the bullet shell portion before the bullet bottom portion is destroyed and separated by a firing backward force of the filler. An ammunition for empty packaging, characterized in that a destruction area that causes destruction is formed on the inner surface of the bottom part. 5. The ammunition for empty packaging according to claim 4, wherein the inner surface of the bottom portion is formed in a semicircular shape in the cross section of the recess.

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