JP5577870B2 - Cylindrical ammunition container - Google Patents

Description

  The present invention relates to a cylindrical ammunition container used as, for example, a packaging container for a projectile ammunition, a packaging container for an ammunition, etc.

  Packing containers in the ammunition field mean metal containers called motor cases used for the exterior of missiles, etc., or metal containers used when storing and transporting projectile ammunition. To do. A missile is a unit in which a liner is attached to the inner surface of a motor case, and a propellant is cast inside it. The missile is stored in a storage container called a canister and mounted on a submarine or the like. It is. Therefore, the motor case used as a packaging container is held in an integrated state with the propellant until the missile is launched.

  On the other hand, a packing container used for a projectile charge for an ammunition can be temporarily used when storing a charge charged with a fine granular charge in an ammunition store or when carrying a charge. It is just a metal container used. When the propellant is inserted into a chamber such as a howitzer, the packaging container is removed.

  In general, a packaging container used for a projectile charge for an ammunition, an ammunition for a cannon, etc. has a structure having a drop strength and airtightness of a certain level or more in consideration of operational aspects. In recent years, artillery ammunition for artillery ammunition has been required to have good handling at the time of storage and operation because of its overseas dispatch activities based on peace-contributing activities. As a method for evaluating the handling of artillery ammunition and gunpowder, test methods have been standardized by ITOP (International Test Operations Procedure) and STANAG (Standardization Agreement, NATO standard) in the United States. In these standards, drop tests, cook-off tests, detonation tests, and fire sensitivity tests are defined as test items for evaluating operational handling.

  In order to satisfy such regulations, a high drop strength and excellent airtightness are required for a packaging container for an ammunition projectile and an artillery ammunition.

  However, in the existing packing container, when the explosives constituting the ammunition and the propellant charged in the container are ignited, the combustion reaction of the explosives easily falls into a severe state. In that case, an explosion phenomenon with explosion sound, or in the worst case, a detonation phenomenon that is the same as the combustion reaction of explosives occurs, often causing a great deal of damage and loss to surrounding personnel and equipment. Yes.

  Accordingly, an object of the present invention is to provide a cylindrical ammunition container that can mitigate the combustion reaction of ammunition while maintaining strength.

  In order to achieve the above object, a cylindrical ammunition container according to a first aspect of the present invention includes a cylindrical body, a disk-shaped bottom portion having a cylindrical portion, and a disk-shaped lid portion having a cylindrical portion. Are joined. And the ratio of the destruction strength of the trunk | drum with respect to the lower one of the destruction strength of the said bottom part and a cover part is 0.09-0.50, It is characterized by the above-mentioned.

In the cylindrical ammunition container of the second invention, in the first invention, the ratio of the length of the body part to the total length of the cylindrical ammunition container is 0.70 to 0.95.
In the cylindrical ammunition container according to the third aspect of the present invention, in the first or second aspect of the invention, the cylindrical portion of the lid portion and the bottom portion are connected by a reinforcing member.

  In the cylindrical ammunition container according to the present invention, a cylindrical bottom portion having a cylindrical portion and a disc-shaped lid portion having a cylindrical portion are joined to a cylindrical barrel portion, and the breaking strength of the bottom portion and the lid portion is obtained. Of these, the ratio of the fracture strength of the body portion to the lower fracture strength is set to 0.09 to 0.50. Therefore, while maintaining the strength of the barrel portion of the cylindrical ammunition container within a predetermined range, the barrel portion is easily broken when the internal ammunition is burned, and combustion gas can be released before the combustion reaction becomes intense from there. it can.

  Therefore, the cylindrical ammunition container can moderate the combustion reaction of ammunition while maintaining strength.

Sectional drawing which shows the container for cylindrical ammunition in embodiment and the preliminary test 1. FIG. The principal part sectional drawing which fractures | ruptures and shows the cylindrical ammunition container in Examples 1-10. The principal part sectional drawing which fractures | ruptures and shows the cylindrical container for ammunition in Example 11. FIG. The principal part sectional drawing which fractures | ruptures and shows the cylindrical ammunition container in Examples 12-15. (A) is principal part sectional drawing which partially fractures and shows the cylindrical container for ammunition in Example 16, (b) is sectional drawing in the 5b-5b line | wire of (a). (A) is principal part sectional drawing which fractures | ruptures and shows the cylindrical ammunition container in Example 17, (b) is sectional drawing in the 6b-6b line | wire of (a). The fragmentary sectional view which shows another example of the connection part of the cylinder part and trunk | drum of a cover part.

Embodiments that embody the present invention will be described in detail below.
As shown in FIG. 1, a cylindrical ammunition container (hereinafter also simply referred to as an ammunition container) 10 of this embodiment has a cylindrical part 12a at one end (the left end in FIG. 1) of a cylindrical body part 11. The disk-shaped bottom part 12 which has is joined, and the disk-shaped cover part 13 which has the cylinder part 13a is joined to the other end. A notch surface 12c formed on the inner periphery of the end portion of the cylindrical portion 12a is joined to the outer peripheral surface of the bent portion 12b in which the outer peripheral edge of the bottom portion 12 is bent outward in the axial direction of the ammunition container 10. Are integrally configured. A stepped surface 13b formed at the end of the cylindrical portion 13a is joined to the outer peripheral surface of the lid portion 13 to be integrally formed. The body portion 11 is joined to a step portion 12d formed on the inner periphery of the end portion of the cylindrical portion 12a constituting the bottom portion 12 at one end outer periphery, and the end portion of the cylindrical portion 13a constituting the lid portion 13 on the other end outer peripheral portion. It joins to the step part 13c formed in the periphery. The members are joined by a method such as seam welding.

  An ammunition 14 is loaded inside the ammunition container 10. As the ammunition (propellant) 14, those conventionally used such as a single base propellant, a double base propellant, a triple base propellant and the like are used.

  The bottom portion 12 and the lid portion 13 are formed of a synthetic resin such as a vinyl chloride resin in addition to a metal such as iron or aluminum such as a cold rolled steel plate. Usually, the same material is selected as the material of the bottom portion 12 and the lid portion 13, but different materials may be used. The body 11 is made of iron such as cold-rolled steel, metal such as aluminum, synthetic resin such as vinyl chloride resin, laminated paper, etc., but its breaking strength is lower than the breaking strength of the bottom 12 and the lid 13. Selected as Each material of the ammunition container 10 is not particularly limited, and all materials conventionally used for the ammunition container 10 can be used. Even with the same material, the breaking strength can be changed by changing the thickness or the like.

  In order to moderate the combustion reaction of the ammunition 14 while maintaining the strength of the ammunition container 10, the ratio of the fracture strength of the body portion 11 to the lower one of the fracture strengths of the bottom portion 12 and the lid portion 13. Is set to 0.09 to 0.50. When this ratio is less than 0.09, the breaking strength of the barrel portion 11 is low, and the barrel portion 11 is deformed when the ammunition container 10 is handled, or a portion of the barrel portion 11 is damaged. On the other hand, when the ratio exceeds 0.50, the fracture strength of the barrel 11 is high, and when the ammunition 14 is ignited, the barrel 11 is not quickly broken by the pressure of the combustion gas, and the rapid progress of the combustion reaction of the ammunition 14 is suppressed. May not be possible and the combustion reaction may fall into a severe state.

  The breaking strength of the body portion 11 is preferably 0.5 to 2.8 MPa, and particularly preferably 0.7 to 1.6 MPa. When the breaking strength of the trunk portion 11 is less than 0.5 MPa, the strength of the trunk portion 11 is excessively lowered, and there is a risk of damage during handling of the ammunition container 10. On the other hand, when the fracture strength exceeds 2.8 MPa, the strength of the body 11 becomes too high, and the body 11 is difficult to be broken by the pressure of the combustion gas when the ammunition 14 is burned, and the combustion reaction of the ammunition 14 is suppressed. It becomes difficult to do.

  Moreover, it is preferable that the ratio of the length of the trunk | drum 11 with respect to the full length of the container 10 for ammunition is 0.70-0.95. When this ratio is smaller than 0.70, when the barrel portion 11 is damaged by the combustion gas generated by the combustion of the ammunition 14, many pieces are generated, and the scattering distance of the pieces becomes long. On the other hand, when the ratio is larger than 0.95, if the ammunition container 10 is dropped during transportation of the ammunition container 10, the body 11 may be deformed or damaged, which is not preferable.

  As shown in FIGS. 5A and 5B, a plurality of plate-like reinforcing members 15 are joined between the outer surfaces of the bottom 12 and the cylinders 12 a and 13 a of the lid 13. These reinforcing members 15 are formed of a metal plate such as a cold-rolled steel plate, and are arranged at intervals of 120 degrees in the circumferential direction of the ammunition container 10. By connecting the reinforcing member 15 between the bottom portion 12 and the lid portion 13 in this way, the strength of the ammunition container 10 can be increased and the handleability can be improved.

Next, the operation of the ammunition container 10 configured as described above will be described.
Now, when the ammunition container 10 is handled such as when it is transported, if the ammunition 14 in the ammunition container 10 causes a combustion reaction due to an impact, temperature rise or the like, the ammunition container 10 is generated by the generated combustion gas. The pressure inside rises. At this time, the ratio of the fracture strength of the trunk portion 11 to the lower one of the fracture strengths of the bottom portion 12 and the lid portion 13 so that the strength of the trunk portion 11 is lower than the strength of the bottom portion 12 or the lid portion 13. Is set to 0.09 to 0.50. Therefore, when the pressure of the combustion gas in the ammunition container 10 rises, a part of the trunk portion 11 is broken and the combustion gas is released therefrom. Therefore, the combustion reaction of the ammunition 14 is stopped without proceeding further in the ammunition container 10.

The effect exhibited by the above embodiment is described collectively below.
(1) In the ammunition container 10 of the present embodiment, the ratio of the breaking strength of the trunk portion 11 to the lower breaking strength of the breaking strength of the bottom portion 12 and the lid portion 13 is set to 0.09 to 0.50. Has been. For this reason, when the internal ammunition 14 is combusted while maintaining the strength of the body portion 11 with respect to the strength of the bottom portion 12 or the lid portion 13, the body portion 11 is easily broken by the combustion gas, and the combustion reaction becomes intense from there. The combustion gas can be released before.

Accordingly, the ammunition container 10 can effectively mitigate the combustion reaction of the ammunition 14 while sufficiently maintaining its strength.
(2) Since the ratio of the length of the body 11 to the total length of the ammunition container 10 is 0.70 to 0.95, the handling property of the ammunition container 10 can be maintained well, and the ammunition 14 It is possible to reduce the number of fragments when the body portion 11 is damaged by the combustion gas, and to suppress the scattering distance of the fragments.

  (3) Strengthening of the ammunition container 10 is improved by connecting the reinforcing member 15 between the cylindrical portions 12a and 13a of the bottom portion 12 and the lid portion 13, and handling during transportation and storage of the ammunition container 10 is performed. Can be improved.

Hereinafter, the embodiment will be described more specifically with reference to preliminary test examples, examples, and comparative examples.
(Preliminary test example 1)
Using the specimen of the ammunition container 10 shown in FIG. 1, a disc-shaped bottom portion 12 having a cylindrical portion 12a formed of a cold-rolled steel plate (abbreviation: SPCC), and a disc-like shape having a cylindrical portion 13a. The breaking strength of the lid portion 13 was determined. For the cylindrical body portion 11, SPCC having a thickness of 3.2 mm that is higher than the strength of the bottom portion 12 and the lid portion 13 was used. The length of the trunk portion 11 was 292 mm, the inner diameter of the ammunition container 10 was 159 mm, and the total length was 365 mm. The cylindrical portions 12a and 13a of the bottom portion 12 and the lid portion 13 and the body portion 11 were bonded using an epoxy adhesive, and the overlapping of each member in the bonding portion 16 was 20 mm.

Inside the ammunition container 10, 2.3 kg of triple base propellant mainly composed of nitrocellulose, nitroglycerin and nitroguanidine is accommodated as the ammunition 14, and an igniting agent is placed in the center of the ammunition container 10. 0.002 kg of black powder was placed. Further, a pressure transducer 17 for obtaining a breaking strength at which the bottom 12 or the lid 13 is broken is attached to the body 11. Furthermore, in order to confirm the destruction situation, a high-speed video camera was used. As a result of the fracture strength confirmation test, it was confirmed that the bottom 12 (thickness 2.3 mm) was broken at 7.1 MPa.
(Preliminary test example 2)
The breaking strength of the lid portion 13 formed of SPCC and the bottom portion 12 formed of pure aluminum (abbreviation: A1050) was determined. Except for changing the material of the bottom portion 12, a specimen of the ammunition container 10 was prepared in the same manner as in the preliminary test example 1, and a fracture strength confirmation test was performed in the same manner as in the preliminary test example 1. . As a result of the test, it was confirmed that the bottom 12 (thickness 2.3 mm) was destroyed at 3.0 MPa.
(Preliminary test example 3)
The breaking strength of the bottom portion 12 and the lid portion 13 formed of a vinyl chloride resin (abbreviation: PVC) was determined. Except for changing the material of the bottom portion 12 and the lid portion 13, a specimen of the ammunition container 10 was prepared in the same manner as in the preliminary test example 1 and the fracture strength was confirmed in the same manner as in the preliminary test example 1 The test was conducted. As a result of the test, it was confirmed that the bottom 12 (thickness 2.3 mm) was broken at 1.5 MPa.
Example 1
An ammunition container 10 as shown in FIG. 2 was used using the body part 11, the bottom part 12 and the lid part 13 having the material, thickness, breaking strength and dimensions shown in Table 1. That is, the ammunition container 10 shortens the body portion 11, lengthens the cylindrical portions 12 a and 13 a of the bottom portion 12 and the lid portion 13, and also forms the inner peripheral surface of the body portion 11 and the cylinders of the bottom portion 12 and the lid portion 13. The ammunition container 10 is configured in the same manner as the ammunition container 10 shown in FIG.

  The inner diameter of the ammunition container 10 was 159 mm, the total length was 365 mm, and the length of the body 11 was 182 mm so that the ratio to the total length of the ammunition container 10 was 0.5. The cylindrical portions 12a and 13a of the bottom portion 12 and the lid portion 13 and the body portion 11 were joined using an epoxy adhesive, and the overlapping of each member in the adhesion portion 16 was 20 mm. Further, the fracture strength of the body 11 using SPCC having a thickness of 0.8 mm is 2.5 MPa.

The combustibility of the ammunition 14 in the ammunition container 10 and the handleability of the ammunition container 10 were evaluated by the following methods.
(Combustion quality)
In order to evaluate the combustibility of the ammunition 14, an ignition test using smokeless gunpowder was conducted. Inside the ammunition container 10, 2.3 kg of a triple base propellant mainly composed of nitrocellulose, nitroglycerin and nitroguanidine was accommodated as the ammunition 14. The shape of the triple base propellant was 14 mm in diameter, 14 mm in length, and hexagonal in cross section. In addition, an ignition test was performed by placing 0.002 kg of black powder as an ignition powder in the center of the ammunition container 10. At this time, it was evaluated according to the following evaluation criteria whether or not the ammunition container 10 was broken and fragments were scattered. The ignition test results are shown in Table 1.
(Evaluation criteria for ignition test)
A: The number of fragments of the ammunition container 10 is 3 or less and the scattering distance of the fragments is less than 15 m. O: The number of fragments of the ammunition container 10 is 10 or less, or the scattering distance of the fragments is less than 15 m. Δ: The number of fragments of the ammunition container 10 was 10 or more, or the scattering distance of the fragments was 15 m or more. X: The number of fragments of the ammunition container 10 was 10 or more, and the scattering distance of the fragments was 15 m or more. (Handability)
In order to evaluate the handleability of the ammunition container 10, a drop test was performed. Inside the ammunition container 10, 2.3 kg of the same triple base propellant as above is accommodated as the ammunition 14, and the height of 2.1 m with the peripheral surface portion of the ammunition container 10 parallel to the ground. I dropped it. At this time, whether or not the ammunition container 10 was deformed or destroyed was evaluated according to the following evaluation criteria. The test results of these handling properties are shown in Table 1.
(Evaluation criteria for handling test)
◎: After the 2.1 m drop test, the ammunition container 10 did not deform. ○: After the 2.1 m drop test, the ammunition container 10 had a small deformation. △: After the 2.1 m drop test, the ammunition. A large deformation occurred in the container 10 ×: After the 2.1 m drop test, the ammunition container 10 was damaged and the contents leaked out (Examples 2 to 10 and Comparative Examples 1 to 4)
An ammunition container 10 similar to that of Example 1 was used using the body part 11, the bottom part 12 and the lid part 13 having the material, thickness, breaking strength and dimensions shown in Table 1. In Examples 2 to 8 and Comparative Examples 1 to 4 in which SPCC is used for the bottom 12 and the lid 13, the bottom 12 and the lid that have been confirmed to have a breaking strength of 7.1 MPa in the preliminary test 1. 13 was used. In Example 9 in which SPCC was used for the lid 13 and A1050 was used for the bottom 12, the lid 13 and the bottom 12 that were confirmed to have a breaking strength of 3.0 MPa in Preliminary Test Example 2 were used. In Example 10 in which PVC was used for the lid 13 and the bottom 12, the lid 13 and the bottom 12 that were confirmed to have a fracture strength of 1.5 MPa in Preliminary Test Example 3 were used.

Table 1 shows the breaking strength of the body 11 used in each specimen. Using these ammunition containers 10, the same ignition test and drop test as in Example 1 were performed. The test results are shown in Table 1.
(Example 11)
An ammunition container 10 as shown in FIG. 3 was used using the body 11, the bottom 12 and the lid 13 having the material, thickness, breaking strength and dimensions shown in Table 1. In other words, the ammunition container 10 is configured in the same manner as the ammunition container 10 shown in FIG. 2 except that the trunk portion 11 is lengthened and the cylindrical portions 12a and 13a of the bottom portion 12 and the lid portion 13 are shortened. .

  Specifically, the bottom part 12 and the lid part 13 made of SPCC and the trunk part 11 made of PVC having a thickness of 1.2 mm are combined. The inner diameter of the ammunition container 10 is 159 mm, the total length is 365 mm, and the trunk part 11 This is an example of the ammunition container 10 having a length of 354 mm so that the ratio to the total length of the ammunition container 10 is 0.97. The bottom part 12 and the cover part 13 used what was confirmed to have a fracture strength of 7.1 MPa in Preliminary Test Example 1. The cylindrical portions 12a and 13a of the bottom portion 12 and the lid portion 13 and the body portion 11 were bonded using an epoxy adhesive, and the overlapping of each member in the bonding portion 16 was 20 mm.

Table 1 shows the breaking strength of the body 11. Using this ammunition container 10, the same ignition test and drop test as in Example 1 were performed. The test results are shown in Table 1.
(Examples 12 to 15)
An ammunition container 10 as shown in FIG. 4 was used using the body part 11, the bottom part 12 and the lid part 13 having the material, thickness, breaking strength and dimensions shown in Table 1. In other words, the ammunition container 10 is configured in the same manner as the ammunition container 10 shown in FIG. 2 except that the trunk portion 11 is lengthened and the cylindrical portions 12a and 13a of the bottom portion 12 and the lid portion 13 are shortened. .

  Specifically, the ammunition container 10 has an inner diameter of 159 mm, an overall length of 365 mm, and a length of the trunk portion 11 of 292 mm so that a ratio to the total length of the ammunition container 10 is 0.8. It is an example. The bottom part 12 and the cover part 13 used what was confirmed to have a fracture strength of 7.1 MPa in Preliminary Test Example 1. The cylindrical portions 12a and 13a of the bottom portion 12 and the lid portion 13 and the body portion 11 were bonded using an epoxy adhesive, and the overlapping of each member in the bonding portion 16 was 20 mm.

Table 1 shows the breaking strength of the body 11 used in each specimen. Using these ammunition containers 10, the same ignition test and drop test as in Example 1 were performed. The test results are shown in Table 1.
(Examples 16 and 17)
As shown in FIGS. 5A and 5B and FIGS. 6A and 6B, the ammunition container 10 in which the cylindrical portion 13 a of the lid portion 13 and the cylindrical portion 12 a of the bottom portion 12 are connected by a reinforcing member 15. It is an example. The lid portion 13 and the bottom portion 12 of the ammunition container 10 were formed of SPCC, and PVC was used for the body portion 11. The inner diameter of the ammunition container 10 is 159 mm, the total length is 365 mm, and the length of the body portion 11 is 0.97 in Example 16, as shown in FIG. In Example 17, as shown in FIG. 6A, the length was 292 mm so that the ratio to the total length of the ammunition container 10 was 0.8. The bottom part 12 and the cover part 13 used what was confirmed to have a fracture strength of 7.1 MPa in Preliminary Test Example 1.

  The cylindrical portions 12a and 13a of the bottom portion 12 and the lid portion 13 and the body portion 11 were bonded using an epoxy adhesive, and the overlapping of each member in the bonding portion 16 was 20 mm. A reinforcing member 15 made of SPCC having a length of 365 mm, a width of 20 mm, and a plate thickness of 2 mm was welded and fixed to the outer periphery of the bottom portion 12 and the lid portion 13 every 120 degrees in the circumferential direction of the ammunition container 10. Table 1 shows the breaking strength of the body 11 used in each specimen. Using these ammunition containers 10, the same ignition test and drop test as in Example 1 were performed. The test results are shown in Table 1.

表１に示した結果より、実施例１〜１１では底部１２と蓋部１３の破壊強度のうちいずれか低い方の破壊強度に対する胴部１１の破壊強度の比率が０．０９〜０．５０の範囲内に設定されていることから、概ね良好な発火試験結果を示すと同時に、良好な取扱性を得ることができた。実施例１２〜１５及び１８〜２１では、弾薬用容器１０の全長に対する胴部１１の長さの比率が０．７〜０．９５の範囲内に設定されているため、発火試験結果が一層良好となることが示された。実施例１６及び１７では、前記底部１２と蓋部１３の各筒部１２ａ、１３ａ間を補強部材１５で連結したことから、弾薬用容器１０の取扱性を向上させることができた。

From the results shown in Table 1, in Examples 1 to 11, the ratio of the breaking strength of the body portion 11 to the breaking strength of the lower one of the breaking strength of the bottom portion 12 and the lid portion 13 is 0.09 to 0.50. Since it was set within the range, it showed a generally good ignition test result and at the same time good handleability. In Examples 12 to 15 and 18 to 21, the ratio of the length of the body portion 11 to the total length of the ammunition container 10 is set in the range of 0.7 to 0.95, so that the ignition test result is even better. It was shown that In Examples 16 and 17, since the cylindrical portion 12a and 13a of the bottom portion 12 and the lid portion 13 were connected by the reinforcing member 15, the handling property of the ammunition container 10 could be improved.

  On the other hand, in Comparative Examples 1 to 4, the ratio of the breaking strength of the trunk portion 11 to the lower breaking strength of the breaking strength of the bottom portion 12 and the lid portion 13 is set outside the range of 0.09 to 0.50. In addition, since the ratio of the length of the body portion 11 to the total length of the ammunition container 10 is set to be less than 0.7, either the ignition test or the handling property test is inferior.

In addition, the said embodiment can also be changed and implemented as follows.
As shown in FIG. 7, an engagement step portion 11 a corresponding to the step portion 13 c provided on the tube portion 13 a of the lid portion 13 is provided at the end portion of the body portion 11, and the outer peripheral surface of the body portion 11 and the tube portion 13 a It is also possible to configure the inner peripheral surfaces to be flush with each other. Similarly, an engaging step portion corresponding to the step portion 12 d provided on the cylindrical portion 12 a of the bottom portion 12 can be provided at the end portion of the trunk portion 11.

  It is also possible to omit the notch surface 12c and the step surface 13b provided in the bottom 12 and the cylinders 12a, 13a of the lid 13. In that case, it is also possible to provide the notch surface 12c and the level | step difference surface 13b in the bending part 12b and the cover part 13 of the bottom part 12. FIG.

  The step portions 12d and 13c provided on the cylindrical portions 12a and 13a of the bottom portion 12 and the lid portion 13 may be omitted. In that case, a step part can be provided in the outer peripheral surface of both ends of the trunk | drum 11, and the cylinder part 12a, 13a of the bottom part 12 and the cover part 13 can also be engaged with the step part.

The bottom portion 12 may be formed of a disk similar to the lid portion 13, and the bent portion 12b may be omitted.
The number, thickness, width, and the like of the reinforcing members 15 can be changed as appropriate, such as by providing the reinforcing members 15 at four positions with a 90 degree interval in the circumferential direction of the ammunition container 10.

  DESCRIPTION OF SYMBOLS 10 ... Cylindrical ammunition container, 11 ... trunk | drum, 12 ... bottom part, 12a ... cylinder part, 13 ... cover part, 13a ... cylinder part, 15 ... reinforcement member.

Claims (3)

A cylindrical ammunition container in which a cylinder-shaped body portion is joined to a disk-shaped bottom portion having a cylindrical portion and a disk-shaped lid portion having a cylindrical portion,
A cylindrical ammunition container, wherein the ratio of the breaking strength of the trunk portion to the lower breaking strength of the bottom portion and the lid portion is 0.09 to 0.50. 2. The cylindrical ammunition container according to claim 1, wherein a ratio of a length of the body portion to a total length of the cylindrical ammunition container is 0.70 to 0.95. The cylindrical ammunition container according to claim 1 or 2, wherein the cylindrical portions of the lid portion and the bottom portion are connected by a reinforcing member.

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