JP6707965B2 - Ammunition container - Google Patents

Description

The present invention relates to a cylindrical container for ammunition, which is used as, for example, a projectile charge for a shell and a packaging container for ammunition for gun.

The ammunition container used for projectile charge for rifle ammunition, etc. is a temporary charge when packing multiple propellant charges loaded with fine granular propellant and transporting or storing them in the ammunition storage. It is a metal container used. The ammunition container is removed when the propellant charge is inserted into the chamber of the shell. Generally, an ammunition container as a packaging container used for a projectile charge for a shell and an ammunition for an artillery has a structure having drop strength and airtightness above a certain level in consideration of operation.

In recent years, propellants for gun shells and ammunition for guns have been required to have good handleability during storage and operation due to overseas dispatch activities based on peace contribution activities. As a method for handling and evaluating ammunition for firearms and propellant, the test method is standardized by ITOP (International Test Operations Procedure) in the United States. In this standard, drop tests and vibration tests are stipulated as test items for evaluating the handling in operation. In order to meet such regulations, a strong drop strength and a high airtightness are required for the projectile charge for the shell and the ammunition container for the gun ammunition.

However, in the conventional ammunition container, when the ammunition contained in the container or the explosives composing the propellant charge is ignited, the combustion reaction of the explosives occurs in the ammunition container having high airtightness, so the ammunition The container itself explodes like ammunition, causing a great deal of damage and loss to surrounding personnel and equipment.

There is also proposed an ammunition container that has an opening hole in the ammunition container so that even if the ammunition in the ammunition container is ignited by a bullet or a fire, the opening part opens large and the internal pressure is released to prevent it from exploding. ing. However, when a high-speed fragment such as a fragment of a warhead collides, the internal pressure becomes higher before the combustion of explosives is promoted and the opening is greatly opened, and the ammunition container itself explodes.

Therefore, there is Patent Document 1 as an ammunition container that can suppress damage to the surroundings by relaxing the combustion reaction of the ammunition while maintaining a constant drop strength. Specifically, a container for ammunition having a bottomed cylindrical container body, and a cylindrical body of the container body having a spiral joint, and a lid for closing the opening of the container body, A slit made of a single line extending in the axial direction is formed in the cylindrical portion of the container body. It is said that the slit may be provided at a plurality of locations, and the ratio (Σx/L) of the sum (Σx) of the length x of the slit to the length L of the cylindrical portion is 0.25 to 3.0, The ratio (y/D) of the width y of the slit to the outer diameter D of the cylindrical portion is designed to be 0.001 to 0.05.

Further, Patent Document 2 discloses an ammunition container having a bottomed cylindrical container body and a lid for closing an opening of the container body, the ammunition container having a predetermined shape and a predetermined length in a cylindrical portion of the container body. A long hole is bored through the inside and outside with a predetermined gap, and the long hole is alternately arranged with a joint portion of a predetermined length and extends axially as at least one stitch-like weak portion, and a stitch extending in the axial direction. There is disclosed an ammunition container in which the container is sealed by providing a sealing means in the gap between the full-length holes in the fragile portion.

JP 2012-117741 A JP, 2005-227764, A

However, in Patent Document 1 and Patent Document 2, since the cylindrical portion of the container body is a steel pipe having a spiral joint, that is, a spiral steel pipe, the thickness of the spiral steel pipe is related to the manufacturing method in which the steel strip is drawn into a spiral shape. Therefore, the upper limit of the thickness is low, and it is thinner than the electric resistance welded steel pipe, the plate-wound steel pipe, or the seamless steel pipe having a continuous linear weld portion. Specifically, when the outer diameter of the steel pipe is D0 and the thickness of the steel pipe is D1, the maximum D1/D0 of the spiral steel pipe is 0.014, while the maximum D1/D0 of the electric resistance welded steel pipe is 0.075. is there. In a container for ammunition that uses a spiral steel tube as the container body, a mechanical force is applied to the rapid internal pressure generated when high-speed debris such as warhead debris collides and the ammunition or propellant charge in the container for ammunition ignites. The strength may be insufficient, and the spiral steel pipe may be broken into small pieces and scattered at high speed, which may cause great damage and loss to surrounding personnel and equipment.

Therefore, the present invention is to solve the above problems, and to provide a container for ammunition that can ensure the safety when explosives are ignited inside the container while more reliably ensuring the drop strength in normal times. With the goal.

In order to achieve the above-mentioned object, the container for ammunition of the first invention has a bottomed cylindrical container body and a lid for closing the opening of the container body, and a cylindrical portion of the container body, A ammunition container having a plurality of perforated slits arranged in the same straight line extending in the axial direction, wherein the cylindrical portion of the container body is a steel pipe having a welded portion continuous in the axial direction. When the outer diameter of the container body is D0 and the thickness of the container body is D1, the relationship of 0.015≦D1/D0≦0.031 is satisfied, the length of the container body is L0, and the slit When L1 is the length and A1 is the length of the non-opening portion between the opening holes, the relationship of 0.60≦L1/L0≦0.95, 0.04≦A1/L1≦0.30 It is characterized by satisfying.

The container for ammunition of the second invention has a bottomed cylindrical container body and a lid for closing the opening of the container body, and a plurality of opening holes are axially formed in the cylindrical portion of the container body. An ammunition container having perforated slits extending in the same straight line and penetrating therethrough, wherein the cylindrical portion of the container body is a seamless steel pipe, the outer diameter of the container body is D0, and the thickness of the container body is Is defined as D1, the relationship of 0.015≦D1/D0≦0.031 is satisfied, the length of the container body is L0, the length of the slit is L1, and the length of the non-opening portion between the opening holes is Is defined as A1, the relationship of 0.60≦L1/L0≦0.95 and 0.04≦A1/L1≦0.30 is satisfied.

According to the ammunition container of the present invention, the ratio of the thickness (D1) of the container body to the outer diameter (D0) of the container body is set to 0.015≦D1/D0≦0.031, so that explosives It is possible to avoid fragmentation of the container body in case of an emergency, and ensure safety at the time of ignition. Further, the ratio of the length (L1) of the slit to the length (L0) of the container body and the ratio of the total length (ΣA1) of the non-opening portion to the length (L1) of the slit are designed within a predetermined range. As a result, it is possible to avoid the explosion of the ammunition container in an emergency when the explosives are ignited inside the container while ensuring the drop strength and airtightness in the normal state, and to ensure the safety at the time of ignition.

It is a partially broken side view of the ammunition container of Embodiment 1. It is a partially broken side view of the ammunition container of Embodiment 2.

Hereinafter, representative embodiments of the present invention will be described. As shown in FIG. 1, an ammunition container 1 according to the first embodiment has a bottomed cylindrical container body 10 and a lid 11 that closes an opening of the container body 10, and has a plurality of ammunition inside. Alternatively, a propellant charge (not shown) is arranged in series and loaded. As the ammunition (propellant), single-base propellant, double-base propellant, triple-base propellant, multi-base propellant, etc. are used.

The container body 10 of the first invention is made of steel, and is an electric resistance welded steel pipe or plate-wound steel pipe in which the short sides of the steel plates are rounded, the long sides are abutted, and the abutted long sides are welded. Has a continuous welded portion 30.

The container body 10 of the second invention is made of steel, and is a seamless steel tube obtained by forming a heated round steel piece into a hollow tube with a punching machine and rolling it with a plug mill, and having no welded portion.

It is preferable to set the ratio of the thickness D1 of the container body 10 to the outer diameter D0 of the container body 10 to 0.015≦D1/D0≦0.031. If D1/D0 is smaller than 0.015, the container body may be fragmented in an emergency when explosives are ignited, and if D1/D0 is larger than 0.031, the weight of the container body 10 itself increases and during transportation or It causes trouble when handling. In the case of an ammunition container used for a 155 mm class shell ammunition, the thickness D 1 of the container body 10 is generally 2.6 to 3.7 mm.

The material of the lid 11 is not particularly limited as long as it can seal the inside of the ammunition container 1. For example, in addition to the same steel as the container body 10, it is also possible to use metal other than steel, plastic, fiber-reinforced plastic, resin-impregnated paper, or rubber. The shape of the lid body 11 is a flat plate shape, a dome shape, or a cup shape, and is not particularly limited. The lid 11 is fitted into the opening of the container body 10 by press fitting or screwing.

In addition, a slit 20 extending in the axial direction is formed on the cylindrical portion 10a of the container body 10. The slit 20 has a perforation shape (broken line shape) in which a plurality of opening holes 20a are arranged on the same straight line, and each opening hole 20a is formed by penetrating the cylindrical portion 10a in and out. Thereby, when the ammunition is ignited in the ammunition container 1, the combustion gas is positively released to the outside of the ammunition container 1 through each opening 20a, so that the internal pressure rise can be suppressed, and the ammunition container 1 Explosion can be avoided. On the other hand, since the slit 20 is formed in a perforated shape, there is a non-opening portion 20b between each opening hole 20a. As a result, the drop strength is higher than in the case where a slit having no non-opening portion, that is, a slit formed of continuous opening holes is formed.

The shape of each opening 20a may be a rectangle or an ellipse that is long in the axial direction, or a circle or a square. Above all, a rectangle or an ellipse that is substantially linear in the axial direction is preferable.

Here, the length of the container body 10 is L0, the length of the slit 20 is L1, the length of each opening hole 20a is A0, and the length of the non-opening portion 20b existing between each opening hole 20a (adjacent openings When the distance between the holes 20a) is A1, the ratio (L1/L0) of the length L1 of the slit 20 to the length L0 of the container body 10 is 0.60≦L1/L0≦0.95, preferably 0. .70≦L1/L0≦0.95. If (L1/L0) is less than 0.60, the length L1 of the slit 20 is too short with respect to the length L0 of the container body 10, so that when the explosives are ignited in the ammunition container 1, the combustion gas Is not efficiently released from the entire ammunition container 1, and the risk of the ammunition container 1 exploding is increased and safety at the time of ignition is insufficient. On the other hand, when the upper limit of (L1/L0) is larger than 0.95, it interferes with the fitting part of the lid 11, and when the explosives are ignited, the fitting part is deformed and the lid 11 scatters to ignite. Lack of safety.

At the same time, the sum (ΣA1) of the length A1 of the non-opening portion 20b to the length L1 of the slit 20 is 0.04≦ΣA1/L1≦0.30, preferably 0.12≦ΣA1/L1≦0.20. Design to meet relationships. Thus, the provision of the slits 20 ensures the safety at the time of ignition, while the reduction in strength due to the formation of the slits 20 can be suppressed to a necessary minimum, so that the drop strength can be reliably ensured. When (ΣA1/L1) is less than 0.04, the drop strength of the ammunition container 1 is insufficient, and when it exceeds 0.30, the pressure required for opening the slit 20 is too high and the safety during ignition is insufficient. Since the length L1 of the slit 20 is set according to the size of the ammunition stored in the ammunition container, the length A1 of the non-opening portion 20b is preferably set to 1 mm or more and 13 mm or less, more preferably 1 mm or more and 5 mm or less. By doing so, the drop strength test and the fire safety test can be satisfied at the same time.

The number of openings 20a to be provided is not particularly limited as long as the above two conditions are simultaneously satisfied. The number can be freely designed within the range of preferably 3 to 50, more preferably 10 to 40, and further preferably 20 to 30. Further, the length of each opening hole 20a can be freely designed within a range of 10 to 200 mm, preferably 20 to 160 mm, in a range where the above two conditions are simultaneously satisfied. The lengths of the respective opening holes 20a and the respective non-opening portions 20b do not necessarily have to be the same, but it is preferable that all the opening holes 20a and the non-opening portions 20b have the same length. Further, the width of each opening hole 20b (circumferential dimension in the container for ammunition) may be freely designed within the range of 0.05 to 7.0 mm, preferably 0.1 to 5.0 mm.

Next, the ammunition container 2 of Embodiment 2 shown in FIG. 2 will be described. The container body 10 is made of steel, and is a seamless steel pipe that is formed in a cylindrical shape in advance.

It is preferable to set the ratio of the thickness D1 of the container body 10 to the outer diameter D0 of the container body 10 to 0.015≦D1/D0≦0.031. If D1/D0 is less than 0.015, the container body may be fragmented in an emergency when explosives are ignited, and if D1/D0 is greater than 0.031, the weight of the container body 10 itself increases and during transportation, It causes trouble when handling. In the case of an ammunition container used for a 155 mm class projectile charge for a shell, the thickness D 1 of the container body 10 is generally 2.6 to 3.7 mm.

The forms of the lid 11 and the slit 20 of the ammunition container 2 according to the second embodiment are the same as those of the ammunition container 1 according to the first embodiment.

Although not shown, a sealing material that seals each opening hole 20a of the slit 20 is bonded to the outer peripheral surface or the inner peripheral surface of the cylindrical portion 10a in order to ensure the airtightness of the ammunition container 1. It As the sealing material, a plurality of relatively short ones can be joined by individually sealing each opening hole 20a or collectively sealing a plurality of them, but from the viewpoint of productivity, It is preferable to seal all the opening holes 20a with one long sealing material. The sealing material may be bonded to the container body 10 by adhesion or welding. In addition, the sealing material is a material having lower strength than the container body 10. This is because, when the ammunition is ignited in the ammunition container 1, it must be broken preferentially over other parts as the internal pressure increases. For example, for the container body 10 made of steel, the sealing material is made of a soft metal such as aluminum or copper, a synthetic resin such as polyethylene or polypropylene, or a sealant material such as a silicone sealant.

Next, the operation of the ammunition container 1 having the above structure will be described. When handling the ammunition container 1 during transportation or temporary storage, when the ammunition or the propellant charge in the ammunition container 1 causes a combustion reaction due to a shock, a temperature rise, etc. The pressure in the container 1 increases. Then, due to the high pressure of the combustion gas, the sealing material is damaged preferentially to other parts, so that the slit 20 is opened and the combustion gas is positively released to the outside through the slit 20. As a result, the rise in the internal pressure of the ammunition container 1 is suppressed, the explosion of the ammunition container 1 is avoided, and safety at the time of ignition is secured. On the other hand, the ratio of the length L1 of the slit 20 to the length L0 of the container body 10 and the ratio of the sum (ΣA1) of the length A1 of the non-opening portion 20b to the length L1 of the slit 20 satisfy predetermined conditions, Even if the ammunition container 1 falls onto the ground during transportation, the drop strength is ensured, so damage and loss of airtightness are avoided.

Further, in order to further avoid damage when the container for ammunition is dropped and to improve the transportability, it is provided by welding or the like on the axial end portion or the central portion of the container body 10 so as to surround the outer surface of the container body 10. A handle-like rim may also be provided.

As the container body, a plate winding steel pipe, a seamless steel pipe, or a spiral steel pipe was used. A steel material having a tensile strength of 270 N/mm ² was used. The length L0 of the container body was 1126 mm.

An aluminum tape having a thickness of 0.5 mm and an adhesive force of 7.9 N/10 mm was used as a sealing material for sealing the slit. Both ends of the sealing material were arranged at positions of 15 mm from both ends of the slit so that the length of the sealing material was 30 mm longer than the length L1 of each slit.

Inside the ammunition container, 13 kg of a triple base propellant containing nitrocellulose, nitroglycerin and nitroguanidine as main components was contained. This triple base propellant is formed into a hexagonal 19-hole shape, and has a diameter of 14 mm, a length of 14 mm, and an inner hole diameter of 0.5 mm.

Then, one slit was formed in the container body under the conditions shown in Table 1, Table 2 and Table 3 parallel to the axial direction, and the drop strength and the safety at the time of ignition were evaluated as follows. The results are also shown in Tables 1, 2, and 3.

(Drop strength)
The drop strength test in which the ammunition container was dropped from a height of 2.1 m in a state parallel to the ground was evaluated according to the following criteria.
◯: The container body was not deformed and the aluminum tape was not broken.
X: The container body was deformed and the aluminum tape was broken.

(Safety at ignition)
A cylindrical steel projectile having a diameter of 15 mm and a mass of 20 g, which was accelerated by explosives to 1900 m/s, was made to collide with the side surface of the cylindrical portion of the ammunition container to perform a safety test during ignition, and evaluation was performed according to the following criteria.
◯: The ammunition container did not fragment and the slit did not open and did not explode.
X: The ammunition container became two or more pieces and was scattered and exploded.

From the results of Tables 1 and 2, in Examples 1 to 15 in which the slits were formed under the condition of simultaneously satisfying the conditions of 0.60≦L1/L0≦0.95 and 0.04≦A1/L1≦0.30 , The drop strength and safety at the time of ignition were ensured.

On the other hand, Comparative Example 1 was a spiral steel pipe, and (D1/D0) was too small, so the safety during ignition was poor. In Comparative Examples 2 and 7, (D1/D0) was too small, so the safety during ignition was poor. In Comparative Examples 3 and 8, (L1/L0) was too small, so the safety at the time of ignition was poor. In Comparative Examples 4 and 9, since (L1/L0) was too large, it interfered with the fitting part of the lid body, and when the explosives ignited, the fitting part was deformed and the lid body scatters to ensure safety at the time of ignition. Was running out. Further, in Comparative Examples 5 and 10, (sum of A1/L1) was too small, so the drop strength was poor. On the other hand, in Comparative Examples 6 and 11, (sum of A1/L1) was too large, and thus safety at the time of ignition was poor.

1, 2, 3 Ammunition container 10 Container body 10a Cylindrical part 11 Lid 20 Slit 20a Open hole 20b Non-opened part 30 Continuous welded part

Claims (2)

A sewing machine having a bottomed cylindrical container body and a lid for closing the opening of the container body, and a plurality of opening holes penetrating in the same straight line extending in the axial direction in the cylindrical portion of the container body. A container for ammunition having an eye-shaped slit,
The cylindrical portion of the container body is a steel pipe having a continuous weld in the axial direction,
When the outer diameter of the container body is D0 and the thickness of the container body is D1,
The thickness D1 of the container body is 2.6 to 5 mm,
Satisfying the relation of 0.015≦D1/D0≦0.031,
When the length of the container body is L0, the length of the slit is L1, and the length of the non-opening portion between the opening holes is A1,
0.60≦L1/L0≦0.95
0.04≦A1 sum/L1≦0.30
An ammunition container for packing a propellant charge or an ammunition for guns that satisfies the relationship of. A sewing machine that has a bottomed cylindrical container body and a lid that closes the opening of the container body, and a plurality of opening holes are arranged in the cylindrical portion of the container body in the same straight line extending in the axial direction. A container for ammunition having an eye-shaped slit,
The cylindrical portion of the container body is a seamless steel pipe,
When the outer diameter of the container body is D0 and the thickness of the container body is D1,
The thickness D1 of the container body is 2.6 to 5 mm,
Satisfying the relation of 0.015≦D1/D0≦0.031,
When the length of the container body is L0, the length of the slit is L1, and the length of the non-opening portion between the opening holes is A1,
0.60≦L1/L0≦0.95
0.04≦A1 sum/L1≦0.30
An ammunition container for packing a propellant charge or an ammunition for guns that satisfies the relationship of.

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