JP2015232431A - An ammunition container having fragile part in body cylinder part and also having locking spider in lid body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ammunition container that maintains shatter strength and air-tightness normally, and also in an emergency where explosives ignite inside a container, avoids explosion of the container and flying of a lid body.SOLUTION: An ammunition container has a cylindrical shape, is used for a packing container of a shooting charge or ammunition, and includes a bottomed cylindrical container body and a lid body blocking an opening of the container body. The container body has, in a cylindrical part thereof, an approximately linear-shaped fragile part that extends in an axial direction of the cylinder. The lid body includes: a lock ring having lock keeper openings; a guard cover which is spline-machined so as to match with the lock ring; and a locking spider having legs designed to be inserted in the lock keeper openings and pressed against a lock keeper surface. Regarding an angle in a circumferential direction of the cylinder having at least two lock keeper openings, the fragile parts extending in the axis direction of the cylinder are bored at positions separated by a predetermined angle and a predetermined length from each other.

Description

  The present invention relates to a cylindrical ammunition container used, for example, as a packing container for a gun cannon firing charge or a gun ammunition. More specifically, the present invention relates to the above-mentioned ammunition container capable of avoiding the explosion of the container and the scattering of the container lid in an emergency when the explosives are ignited inside the container while maintaining the drop strength and the airtightness in the normal state. .

  As described in the following Patent Document 1, an ammunition container used for a projectile charge for an ammunition can pack and transport a plurality of charge charges loaded with fine granular projectiles. It is a metal container that is temporarily used when stored in an ammunition cabinet. When the propellant is inserted into a chamber such as an enamel shell, the ammunition container is removed from the propellant. In general, an ammunition container as a packing container used for a shooting gun for a cannon or an ammunition for a gun has a structure having a drop strength and airtightness of a certain level or more in consideration of operational aspects.

  In recent years, the ammunition for ammunition and other ammunition for artillery have been desensitized and desensitized for the purpose of minimizing my damage when subjected to fires, hits, etc. during storage, transportation and use. Development of low-sensitivity (hereinafter referred to as IM (Insensitive Munition)) and equipment are being promoted. Further, as an IM property and handling evaluation method of these ammunition, the test method is standardized by ITOP (International Test Operations Procedure) and STANAG (Standardization Agreement, NATO standard) of 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. Such regulations need to be satisfied not only for ammunition but also for ammunition containers. Therefore, high IM characteristics and robustness are also applied to ammunition containers for ammunition and gun ammunition. Drop strength and high airtightness are required.

  In Patent Document 2 below, for the purpose of providing a cylindrical ammunition container that can mitigate the combustion reaction of ammunition while maintaining strength, a metal cylindrical shape having a spiral joint portion is provided. In the ammunition container, a cut portion is provided at a position that does not interfere with the joint portion on at least one of the outer peripheral surface and the inner peripheral surface of the cylindrical portion, and the ratio of the depth of the cut portion to the thickness of the cylindrical portion is 0.10. A cylindrical ammunition container is disclosed which is .about.0.95.

  Further, Patent Document 3 below also discloses an opening of a container body having a bottomed cylindrical shape for the purpose of providing a cylindrical ammunition container that can mitigate the combustion reaction of ammunition while maintaining strength. In the metallic cylindrical ammunition container having a helical joint on the cylindrical portion of the container body, the cylindrical portion has a plurality of opening holes at positions where the cylindrical portion does not interfere with the joint. A sealing plate for sealing the opening hole, the sealing plate is set lower than the strength of the cylindrical portion, and the ratio of the total area of the opening portion to the surface area of the outer peripheral surface of the cylindrical portion is 0.02. A cylindrical ammunition container characterized by a value of ˜0.25 is disclosed. Moreover, the aspect whose ratio of the breaking strength of the said sealing board with respect to the breaking strength of the cylindrical ammunition container in which the said opening hole is not provided is 0.1-0.9 is also disclosed.

  Also, in Patent Document 4 below, for the purpose of providing a cylindrical container for ammunition that can mitigate the combustion reaction of ammunition while maintaining the strength, A cylindrical explosive container in which a disc-shaped bottom portion having a cylindrical portion and a disc-shaped lid portion having a cylindrical portion are joined, and the barrel portion with respect to the lower fracture strength of the bottom portion and the lid portion. A cylindrical ammunition container having a fracture strength ratio of 0.09 to 0.50 is disclosed. Moreover, the aspect by which between each cylinder part of the said cover part and a bottom part is connected with the reinforcement member is also disclosed.

  In addition, in Patent Document 5 below, when the propellant stored under impact, heat, or the like explodes, the storage container is destroyed at a predetermined fragile portion so that the opening area due to destruction is as large as possible. In order to provide a container for the propellant charge that can effectively release the pressure and prevent further intense reaction from occurring and prevent the debris from scattering as much as possible. Is a cylindrical body that is welded and integrated or formed in advance in a cylindrical shape, and a container for a propellant charge that includes a bottom member and a lid member that close both ends of the cylindrical body, Storage of a projectile charge in which the cylindrical body has a spiral weakened portion (excluding the welded portion or the welded portion) formed in the length direction on at least one of the inner peripheral surface and the outer peripheral surface Container is disclosed .

  The following Patent Document 6 discloses a cylindrical container with a bottomed shape for the purpose of providing a cylindrical ammunition container that can mitigate the combustion reaction of ammunition and can suppress surrounding damage while maintaining strength. In a metal cylindrical ammunition container having a lid joined to the opening of the main body and a spiral joint to the cylindrical portion of the container main body, the cylindrical portion has at least one position that interferes with the joint. A plurality of through-holes are provided, a sealing plate for sealing the opening holes is provided, and the ratio of the sum of the lengths of the opening holes to the length of the cylindrical portion is 0.25 to 3.0. A cylindrical container is disclosed. Patent Document 5 also discloses an embodiment in which the ratio of the width of the opening hole to the outer diameter of the cylindrical portion is 0.0001 to 0.005.

  Further, Patent Document 7 below discloses an ammunition storage container that is opened when an undesired stimulus is generated in which ammunition burns, and has a top, a bottom, and at least one side surface therebetween, The container contains an explosive therein, the explosive containing energy material and having at least one seam having a joining portion and a non-joining portion on its side; and a non-joining portion of the joint A seal comprising an adhesive or the like for sealing, wherein the seal acts to break when the internal pressure is at least 3 psi above the external pressure before the remainder of the container is broken, thereby The ammunition storage container is disclosed in which the container is opened and the burning rate of the stored energy material is controlled to avoid a violent reaction.

  Furthermore, in the following Patent Document 8, while maintaining the drop strength and airtightness at the normal time, in the event of an emergency when explosives ignite inside the container, the explosion of the container and the scattering of the container lid can be avoided, and the surrounding damage is avoided. For the purpose of providing an ammunition container capable of suppressing the above, an ammunition container having a bottomed cylindrical container body and a lid that closes the opening of the container body, A long metal plate is spirally wound and joined to both side edges to form a cylindrical shape having a spirally extending joint, and the cylindrical portion has a length extending in the axial direction. A hole is formed so as to penetrate inside and outside, the long hole is sealed with a sealing material, and the long hole and the outer surface of the sealing material are covered with a metal cover member. A container for ammunition is disclosed.

As described above, it has been proposed to provide various shapes of weakened portions and openings in the cylindrical body of the explosive container. However, only Patent Documents 6 to 8 are linear shapes extending in the axial direction of the cylindrical body. It teaches that a long hole is formed so as to penetrate inside and outside.
However, none of Patent Documents 6 to 8 teaches or suggests the positional relationship between the inner and outer penetrating linear elongated holes, that is, the weakened portion and the lock holding opening of the lid.

  In addition, in this specification, a weak part means the location where internal / external penetration processing, notch groove processing, and stitch processing are performed, and tensile strength (breaking strength) is low. Also, the stitch-like weak part is a stitch process (the inner and outer through-holes are formed as long holes and the joint parts where the inner and outer through-holes are not formed are alternately formed in a linear manner) among the weak parts. It refers to a location where the tensile strength (breaking strength) is low. Further, the Y-shaped portion refers to a portion where a linear fragile portion bifurcated into a bifurcated shape is formed in both ends of a stitch-shaped fragile portion extending in the axial direction of the cylindrical body.

  Patent Document 9 below is a lid provided at one end of a cylindrical ammunition container used as a packaging container for an ammunition projectile or an artillery ammunition. And (a) a lock ring secured to the opening of the container, wherein the lock ring, together with a lock holding surface, includes a lock holding opening and a subsequent support. (B) a splined guard cover having a segment portion that is compatible with the lock ring and has an outer diameter slightly smaller than the diameter of the ring running on the inner end of the support; and (c) it A lock spider having a screw for tightening by turning, wherein the spider is designed to be inserted into the lock holding opening and pressed against the lock holding surface Having a leg; lid having a locking mechanism having a has been described (see FIGS. 3 and 4). In such a lid, by rotating the handle, the lock spider can be moved to the lock position left or right, and the guard cover can be appropriately tightened or loosened to the container body opening.

  However, the lid described in Patent Document 9 is a lid having a lock mechanism for a synthetic resin packaging container. When applied to a metal container, the lid further has a linear shape extending in the axial direction of the container cylindrical body. How to arrange the position of the lock holding opening into which the lock spider is inserted with respect to the position of the inner and outer through-holes and the stitch part, “explosives constituting the ammunition and the propellant charged in the container” Ignited, and the pressure rises due to the combustion reaction of the explosives in the highly airtight ammunition container, and when the container finally explodes, the lid scatters, resulting in the surrounding personnel. It has not been studied at all about whether it is possible to prevent “a situation that causes damage or loss to equipment or equipment”.

JP 2004-226031 A JP 2011-145007 A JP 2011-252645 A JP 2012-2381 A JP 2012-17935 A JP 2012-117741 A US Pat. No. 7,624,888 JP 2013-44454 A U.S. Pat. No. 4,356,931

As described above, in the conventional ammunition container, when the explosives constituting the ammunition and the projectile charge contained in the container are ignited, the combustion reaction of the explosives in the ammunition container having high airtightness occurs. As a result, the pressure rises and eventually the container explodes, causing a situation where a great deal of damage or loss is caused to surrounding personnel and equipment. As a means to solve the problem, explosives are ignited inside the container while providing a weak portion and an opening of various shapes in the cylindrical body of the container for ammunition to maintain the drop strength and airtightness in normal times. It is an object of the present invention to provide an ammunition container that can avoid explosion of a container and scattering of a container lid in an emergency, and can suppress surrounding damage.
Further, as described above, the cited documents 6 and 7 teach that a linear inner and outer through-hole extending in the axial direction of the cylindrical body is provided as the weakened part or the opening part, but the internal explosive is used. Depending on the type and shape, a considerable amount of inner and outer through-holes are required, and the drop strength and airtightness are not compatible.
Further, as described above, the position of the lock holding opening into which the lock spider is inserted is arranged with respect to the position of the linear inner and outer through-holes and the stitch-like weak portion extending in the axial direction of the container cylindrical body. “The explosives that make up the ammunition and projectiles contained inside the container ignite, the explosives in the highly airtight ammunition container cause a combustion reaction, and the pressure rises. There is no teaching or suggestion as to whether it is possible to prevent a situation where the lid body scatters and causes damage or loss to surrounding personnel or equipment when the explosion occurs.
Under such circumstances, the problem to be solved by the present invention is to ensure the explosion of the container and the scattering of the container lid in an emergency when the explosives are ignited inside the container, while maintaining the drop strength and airtightness in the normal state. The object is to provide a container for ammunition that can avoid the surrounding damage and avoid it.

  As a result of intensive studies and repeated experiments to solve the above-mentioned problems, the present inventors have replaced the cylindrical weakened portion extending in the axial direction with a sealing agent using a sealing agent. When the lid having the lock spider is used for the cylindrical container, when the weak portion having a predetermined shape, a predetermined length, and a predetermined gap is provided independently, The present invention has been completed by finding that the above-mentioned problem can be solved by defining the position of the lock holding opening into which the leg is inserted within a predetermined range in the circumferential direction of the cylindrical body.

That is, the present invention is as follows.
[1] A cylindrical ammunition container used as a packaging container for projectile charge or ammunition,
The container has a bottomed cylindrical container body and a lid that closes the opening of the container body,
The cylindrical portion of the container body is provided with a fragile portion having a predetermined shape and a predetermined length, and further, the fragile portion is on a circumference closer to 300 mm from the following lock ring fixed to the opening of the container. The container is sealed by providing a sealing means on the weak part, and one on the other side of the weak part.
The lid can be opened to remove the charge or ammunition and has a locking mechanism;
The locking mechanism is
(A) a lock ring fixed to the opening of the container, wherein the lock ring has a lock holding opening, followed by a lock holding opening, and a support part;
(B) a splined guard cover having a segment portion that is compatible with the lock ring and has an outer diameter slightly smaller than the diameter of the ring running on the inner end of the support portion;
(C) a lock spider having a mechanism for tightening by turning or folding it, wherein the spider is designed to be inserted into the lock holding opening and pressed against the lock holding surface Have legs;
Comprising
At least two of the lock holding openings at a position 45 degrees or more and 135 degrees or less away from one fragile portion in the cylinder at an angle in a circumferential direction of the cylinder,
A container for ammunition as described above.

  [2] The length of the cylindrical portion of the container body is 600 to 1500 mm, the diameter of the lock ring is 50 to 300 mm, the total length of the fragile portions is 150 to 1000 mm, and the length of the fragile portions The hole is 2 to 100 mm, the gap between the long holes is 0.1 to 1 mm, the joint is 1 to 5 mm, the wall thickness of the cylinder is 1 to 2 mm, and the wall thickness of the lid is 2 to 4 mm The ammunition container according to [1].

  [3] The fragile portion is an inner / outer through hole, a stitch shape in which the inner / outer through hole and the joint portion are linearly continuous, or a cut shape having a thickness thinner than that of the peripheral portion, so that the breaking strength is lower than that of the periphery. The ammunition container according to [1] or [2], which is a processed part.

  [4] The lock holding opening into which the leg of the lock spider is inserted is an L-shaped hook formed by pressing and deforming the support portion of the lock ring inward. [1] to [3] Ammunition container.

  [5] The ammunition container according to any one of [1] to [4], wherein the sealing means is filling the gap with an adhesive or a coating agent that decomposes and burns by heat.

  [6] The three lock holding openings are located at positions separated by approximately 120 ° each, and the angle in the circumferential direction of the cylinder is approximately 10 ° from one weakened portion of the cylinder, or 50 ° or more and 70 ° or less. The ammunition container according to any one of [1] to [5], which has at least one lock holding opening at a distant position.

  By using the ammunition container according to the present invention, while maintaining the drop strength and airtightness in the normal state, in the event of an emergency when the explosives ignite inside the container, it is necessary to reliably avoid the explosion of the container and the scattering of the container lid. Can prevent damage. That is, in the ammunition container having a fragile portion in the cylindrical container body according to the present invention, by defining the position of the fragile portion and the position of the lock holding opening into which the leg of the lock spider is placed within a predetermined range, It is possible to prevent the lid from scattering and to avoid damage or loss to surrounding personnel or equipment.

It is a perspective view of the container for ammunition of a prior art. In the figure, the gap of the long hole penetrating portion of the container body is shown. It is a perspective view of the container for ammunition which has the weak part which concerns on this embodiment (stitch-like weak part which consists of an internal and external through-hole and a junction part), and has a cover body which has a lock spider. It is sectional drawing of the cover body disclosed by patent document 9. FIG. FIG. 10 is a plan view of a lid disclosed in Patent Document 9. Deformation of the circular end of the cylindrical container body due to the opening in the fragile part due to explosion (lengthening in the fragile part direction (upper stage), and shortening in the direction of the leg of the lock spider perpendicular to the fragile part direction (middle stage), It is a figure explaining the diameter reduction (lower stage) at the time of providing the position of a weak part 300mm or more away from the lock ring.When the leg of a lock spider is two. It is a figure which illustrates the variation of the number of legs of a lock spider, and a weak part position. It is a figure explaining the structure in case the lock holding opening into which the leg of a lock spider is put is an L-shaped hook which carried out the press deformation of the support part of a lock ring inside. It is the schematic explaining various safety evaluation and them. It is a figure which shows the setup condition of a safety test. It is a figure which illustrates the opening state of the various weak parts by explosion. It is a figure which shows the example which analyzed the event based on the result of the Example. It is a figure explaining the positional relationship of the weak part of the container of this embodiment, and the leg part of a lock spider.

Hereinafter, embodiments of the present invention will be described in detail.
As described above, the ammunition container according to the present embodiment is a cylindrical ammunition container used as a packaging container for a shooting charge or ammunition,
The container has a bottomed cylindrical container body and a lid that closes the opening of the container body,
The cylindrical portion of the container body is provided with a fragile portion having a predetermined shape and a predetermined length, and further, the fragile portion is on a circumference closer to 300 mm from the following lock ring fixed to the opening of the container. The container is sealed by providing a sealing means on the weak part, and one on the other side of the weak part.
The lid can be opened to remove the charge or ammunition and has a locking mechanism;
The locking mechanism is
(A) a lock ring fixed to the opening of the container, wherein the lock ring has a lock holding opening, followed by a lock holding opening, and a support part;
(B) a splined guard cover having a segment portion that is compatible with the lock ring and has an outer diameter slightly smaller than the diameter of the ring running on the inner end of the support portion;
(C) a lock spider having a mechanism for tightening by turning or folding it, wherein the spider is designed to be inserted into the lock holding opening and pressed against the lock holding surface Have legs;
Comprising
At least two of the lock holding openings at a position 45 degrees or more and 135 degrees or less away from one fragile portion in the cylinder at an angle in a circumferential direction of the cylinder,
It is the said container for ammunition characterized by the above-mentioned.

  The present inventor simulated the burning speed of the explosives embedded in the container, the increase in the internal pressure of the container, the breaking strength of the container material, the opening area of the container, etc. It was found that there was a risk of flying the lid depending on the position of the weak part. Therefore, when the lid body having the lock spider of the prior art is applied to a container body having the weak section of the prior art, the position of the weak section and the lock spider so that the lid body does not fly. The position of the leg portion was defined within a predetermined range.

  FIG. 1 shows a prior art ammunition container. The lid is a screw-type non-open type, and the fragile portion is a straight inner / outer through-hole and has a predetermined gap. The gap between the inner and outer through-holes of the stitch-like weak part in the present embodiment is also defined in the same manner as shown in the figure. An ammunition container (also simply referred to as a container) has a bottomed cylindrical container body and a lid that closes the opening of the container body, and a plurality of ammunition (not shown) are arranged in series inside. It is supposed to be loaded. As the ammunition (propellant), a single base propellant, a double base propellant, a triple base propellant, a multi-base propellant and the like are used. Usually, a reinforcing rim provided so as to surround the outer surface of the container main body is installed at an end portion in the axial direction of the cylindrical container main body. As shown in FIG. It may be additionally installed in the center.

  In the present invention, the container body is made of metal, and the cylindrical portion is formed by winding a long metal long plate in a spiral shape so that both side edges are abutted and joined by seam welding or the like. It can be formed in a shape. Therefore, the cylindrical portion of the container body has a spiral joint extending in the axial direction. The joint extends spirally at an angle of about 20 to 40 ° with respect to the bottom surface of the container body. The material of the metal plate is not particularly limited, and all metals conventionally used in this type of ammunition container can be used, and among them, a highly rigid iron plate is preferable.

As shown in FIG. 1, inner and outer through-holes extending in the axial direction are formed in the cylindrical portion of the conventional container body. By having the internal and external through-holes, when the ammunition is ignited in the ammunition container, it is possible to suppress the increase in internal pressure by releasing the combustion gas to the outside of the ammunition container through the internal and external through-holes. It has been said that it can be avoided.
However, as described above, the inventor has analyzed the details of the opening state of the container, the deformation state of the lock ring, the position of the fragile portion and the leg portion of the lock spider after the combustion reaction of the internal explosive, In the structure in which the fragile portion is drilled in the cylindrical body, the lid body may fly, and it has been found that safety to the surroundings may not be ensured. Instead of such a weak portion structure of the prior art, there is newly provided a structure further having the weak portion at a predetermined position on the circumference of the cylindrical can.

FIG. 2 shows an ammunition container having a fragile portion according to the present embodiment and a lid having a lock spider whose legs described below have three lock spiders. In FIG. 2, the shape of the inner and outer through-holes of the stitch-like fragile portion is linear.
Since the fragile part of the prior art is drilled at a position unrelated to the position of the leg part of the lock spider, the lid part will fly when deformation occurs in the main body and the lock ring after the combustion reaction of internal explosives. On the other hand, in order to ensure safety more reliably, it is different in that the position of the weak part and the position of the leg part of the lock spider is specified.

In the ammunition container according to the present embodiment, the number of fragile portions is defined as one that hangs on the circumference of the body portion closer than 300 mm from the lock ring that fixes the lid portion, or one more diagonally, As long as the strength of the container is maintained, a plurality (for example, 2 to 4 or more) may be provided in the main body portion separated from 300 mm (see FIG. 6). When there are three or more fragile parts within 300 mm from the lock ring, the fragile part breaks unevenly due to the direction and power of external impact, so the deformation of the lock ring is not stable and the lid part flies. The possibility increases. Moreover, what is necessary is just to set the form of a weak part suitably according to the combustion rate and sealing means of the explosive to be equipped. In addition, the fragile portion is basically linear, preferably linear, but may be formed in a curved shape or a spiral shape. Further, the fragile portion may be provided in parallel with the axial direction (center axis) of the container body, or may be provided obliquely with respect to the axial direction (center axis) of the container body. If the length of the at least one fragile portion is 150 mm or more, the combustion gas can be efficiently discharged to the outside.
In the ammunition container according to the present embodiment, the shape of the inner and outer through-holes of the stitch-like fragile portion can be linear, curved, L-shaped or oblique (not shown).

A plate-shaped sealing material may be joined to the outer peripheral surface of the cylindrical portion of the conventional ammunition container so as to seal the inner and outer through holes from the outer surface. The sealing material is larger than the opening area of the inner and outer through-holes, and is joined to the container body by bonding or welding at the outer peripheral portion of the inner and outer through-holes. The sealing material is made of a material having lower strength than the container body. This is because when the ammunition is ignited in the ammunition container, it must be preferentially damaged over other parts as the internal pressure increases. That is, the inner and outer through holes and the sealing material can also be referred to as fragile portions. For example, for the container body made of steel, the sealing material is made of a soft metal such as aluminum or copper, or a synthetic resin such as polyethylene or polypropylene. The sealing material may be in the form of (aluminum) tape or plate.
On the other hand, in the ammunition container according to the present embodiment, the gap between the inner and outer through holes of the stitch-like weak part and the inner and outer through holes of the Y-shaped part additionally provided is preferably narrowed to about 0.1 mm and sealed. The container may be sealed by filling with a stopper. If a predetermined sealant is used after narrowing the gap between the inner and outer through-holes, the desired container airtightness and container strength can be achieved, and the transportation risk of damaging the sealant such as the aluminum tape. Can be reduced.

The lid of the prior art is generally cup-shaped, and the material is not particularly limited as long as the inside of the ammunition container can be sealed. It is also possible to use reinforced plastic, resin-impregnated paper, or rubber. The prior art lid can be fitted into the opening of the container body by press fitting or screwing.
As described above, in one embodiment of the present invention, the lid can be opened to take out the charge or explosive, and (a) a lock ring fixed to the opening of the container. Here, the lock ring has a lock holding opening and a subsequent support part together with a lock holding surface; (b) the diameter of the ring that fits the lock ring and runs on the inner end of the support part A splined guard cover with a segment having a slightly smaller outer diameter; and (c) a lock spider with a screw for tightening by turning it, or a lock spider with a guard bar for tightening by bending the guard cover Where the spider is designed to be inserted into the lock retaining opening and pressed against the lock retaining surface It may be one having a locking mechanism having a; having.

  The lid having such a lock structure can have, for example, the structure described in Patent Document 9 shown in FIGS. 3 and 4, but is limited to this as long as it has a similar structure having the same function. Not.

In this embodiment, at an angle in the circumferential direction of the cylindrical container,
One weak portion extending in the axial direction of the cylinder has a body on a circumference of 30 ° to 150 ° or −30 ° to −150 ° from the one leg when the two legs of the lock spider are provided. When the number of the leg of the lock spider is three, -10 ° to 10 °, 50 ° to 70 °, -50 ° to -70 °, 110 ° to 130 °, It is preferably formed on the body part on the circumference of -110 ° to -130 ° or -170 ° to 170 °.

As shown in FIG. 5, the fragile portion is opened by combustion or explosion of explosives or the like housed in the container (see also FIG. 10). At that time, the circular end of the cylindrical container body is deformed from a perfect circle to an ellipse. This is the same in the upper and middle stages of FIG. 5, but the diameter increases in the direction of the fragile portion and the diameter decreases in the direction (90 °) perpendicular to the direction. Here, the shortening of the diameter becomes maximum at a position of 90 °. At this time, as shown in the upper part of FIG. 5, if the leg of the lock spider of the lid is the same as the direction of the fragile portion, the leg is detached from the lock holding opening. The means for fastening to the container body will not function, and the lid will fly. On the other hand, when the leg of the lock spider of the lid is orthogonal to the weak part direction as in the middle of FIG. 5, the leg is more reliably fixed to the lock holding opening due to the shortening of the diameter in the orthogonal direction. Therefore, even if the fragile portion is opened, the lid body remains fixed to the container body, so that the lid body does not fly. As shown in the lower part of FIG. 5, when the distance between the lock ring and the fragile portion is increased, the deformation of the lock ring after the reaction is reduced, and the lid body does not fly. In FIG. 11, when there are two legs of the lock spider, if one of the two is removed, the lid part will fly easily, so the lid part will be difficult to fly, and the position of the weak part will be the position of the lock spider. This is different from the case with three legs. As described above, the position of the fragile portion extending in the axial direction of the cylindrical container and the position of the leg of the lock spider are set within a predetermined range at an angle in the circumferential direction of the cylindrical container, thereby accompanying the fragile portion opening. It is possible to prevent the lid from flying and to ensure safety.
FIG. 6 illustrates a variation in the position of the weak part when the lids of the lock spider have two and three legs.

  7, as a modification of the lock holding opening described in Patent Document 9 shown in FIGS. 3 and 4, the lock holding opening into which the leg of the lock spider is inserted is L-shaped by pressing the support portion of the lock ring 8 mm inward. The structure in the case of being caught is shown.

  The rim is also made of the same metal as the container body, and can be welded to the outer surface of the container body. The outer peripheral surface shape of the rim is circular and the diameter is the same. When the ammunition container is placed on its side, the rim is in contact with the ground to serve as a fulcrum, and the container main body does not directly contact the ground, which is advantageous in preventing damage to the container main body.

  In this embodiment, the length of the cylindrical portion of the container body is 600-1500 mm, the diameter of the lock ring is 50-300 mm, the total length of the stitch-like weak portions is 150-1000 mm, and the stitch-like weakness The inner and outer through-holes are 2 to 100 mm, the gap between the inner and outer through-holes is 0.1 to 1 mm, the joint is approximately 1 to 5 mm, the wall thickness of the cylinder is 1 to 2 mm, and the lid wall The thickness can be 2-4mm.

Hereinafter, the operation of the ammunition container according to the present invention will be described.
When handling ammunition containers or during temporary storage, if the ammunition in the ammunition container causes a combustion reaction due to impact or temperature rise, the pressure in the ammunition container is caused by the generated combustion gas. To rise. As a result, silicon (adhesive), sealant such as coating agent, aluminum tape or the like filled in the gap between the inner and outer through-holes of the fragile portion and optionally additional Y-shaped through-holes by the combustion gas The sealing means is broken, and the inner and outer through-holes have desired fragility, so that the sealing means is opened, and the combustion gas is discharged to the outside at a container safe internal pressure or less. Thereby, since the increase in the internal pressure of the ammunition container is suppressed, scattering of the lid of the ammunition container is avoided, and safety is improved.
Moreover, in the stitch-like weak part, the gap can be maintained uniformly over the entire axial direction of the container body cylinder part, so that sealing with a sealant that has been peeled off by normal handling has been ensured. At the same time, it is possible to prevent a decrease in container strength due to the presence of the joint.
Furthermore, in the ammunition container according to the present embodiment, the lid is a lid having a lock spider. Such a lid can move the lock spider left and right or up and down to the lock position by turning the handle, and can tighten or loosen the guard cover to the container body opening as appropriate. Easy to put in and out and maintain airtightness.

  In the present embodiment, as described above, by setting the position of the weakened portion extending in the axial direction of the cylindrical container and the position of the leg of the lock spider within a predetermined range at an angle in the circumferential direction of the cylindrical container. This prevents the lid from flying with the opening of the fragile portion and ensures safety. That is, in this embodiment, when the explosive accommodated in the container burns at a stroke, the pressure release speed cannot catch up with only the pressure release mechanism such as the linear inner and outer through-holes provided in the container body, and the lid body flies. Thus, the risk of injury to nearby people can be reduced.

The present invention will be specifically described by the following examples.
The evaluation methods used in the examples are described below.

[Evaluation of safety]
(Response type)
Response types are classified as follows.
Type I response (detonation): The most severe type of explosive event. Supersonic decomposition reaction (detonation) propagates through the energetic material and generates a strong impact on the surrounding medium (eg air, water). Arise. In addition, a large crater is seen on the ground where the shells are located or nearby, and there are effects such as through-holes in adjacent metal plates, plastic deformation, generation of fragments, blast overpressure damage of neighboring structures, and the like.
Type II response (partial detonation): The second most severe type of explosive event. Some, but not all, of the energetic material causes a type I response. A strong impact occurs, part of the container breaks into small pieces, can create craters on the ground, can cause the same damage to adjacent metal plates as type I responses, and cause blast overpressure damage to neighboring structures . Type II responses can result in large container fragments that resemble severe pressure rupture (brittle fracture). The degree of damage compared to the type I response depends on the detonated ratio of the material.
Type III response (explosion): The third most severe type of explosive event. The ignition and rapid combustion of the encapsulated energetic material generate a high local pressure rise and induce severe pressure rupture in the enclosed structure. Metal containers become large pieces (brittle fracture) and can fly far away. Unreacted energy material is also scattered, and some of them fly while burning. Air shocks can occur, which can damage nearby structures. There are fire and smoke hazards. Blasts and high-speed debris can create small craters on the ground and damage (split, tear, groove-like scratches) on adjacent metal plates. The blast pressure is lower than type I and type II responses.
Type IV response (deflagration): The fourth most severe type of explosive event. The ignition and combustion of the sealed energetic material induces a weak pressure release in the low-strength container and the container wall vents (plug gaps, ignition capsules, etc.). The container ruptures, but does not become a fragment, the lid with the orifice comes off and the unburned energetic material scatters, some of which burn while flying, spread the fire. May cause secondary harm by propelling test items with unrelieved pressure relief. There is no blast effect or significant debris damage in the surrounding area, and the only damage is heat and smoke damage from the burning of energetic materials.
V-type response (burning): The lowest intense type of explosive event. Energetic materials ignite and burn without propulsion. Although the vessel will tear gently, it will melt or weaken, allowing the combustion gas to slowly open and the vessel lid to open with internal pressure. Most debris remains at the fire site. It is unlikely that the wreckage will cause fatal injuries to soldiers or that harmful debris will fly over 15 meters (49 feet).
No reaction.

(Slow cook-off test)
As shown in FIG. 8, as the safety evaluation of the examples, a slow cook-off test, which is a reactivity evaluation when the charge is held at a high temperature, was used. The slow cook-off test was compliant with STANAG.

(Test procedure for safety assessment)
As shown in FIG. 9, the metal container was prepared as a cylindrical metal can having a body portion with an overall length of 1100 mm and a diameter of 160 mm and a lid lock ring with a diameter of 190 mm. The body portion of the cylindrical can has a weak portion of 900 mm at the maximum. The weak portion is provided with a joint portion of 2 mm every 50 mm and Y-shaped weak portions at both ends thereof. The length of the fragile portion becomes shorter as the length of the lid lock ring and the end of the fragile portion becomes longer. The body part was about 1 mm thick, and the lid lock ring was about 3 mm thick, and the same material as the above body part was used. The lid lock ring was press-deformed 8mm inward to provide a segment that supports the leg of the lock spider attached to the lid. The lid is also made of an iron cup-like lid so as to cover the opening of the body portion. When the guard bar at the top of the lid is turned, the distance between the lid and the lock spider leg widens, indicated by the segment part, and the lid part is pressed against the body part. A metal container having a lid was prepared. Put the propellant charge into the metal container, attach a heating wire to the side of the metal container, install a thermocouple inside the metal container, and connect the heating wire to maintain the internal temperature rise rate at 3.3 ℃ / hr. The flowing current value was changed.

(Evaluation of safety)
As shown in FIG. 10, according to the number of fragments after the final reaction, safety was evaluated according to the following evaluation criteria:
(Evaluation of safety)
The presence or absence of the lid flying after the final reaction was evaluated:
○: No flying of the lid (when the lid is sunk into the lock ring and firmly fixed)
△: There is a risk of the lid flying (when the lid can be removed by simple manual operation)
X: With lid flying FIG. 10 shows an example of test results.

[Comparative Example 1]
The number of the legs of the lock spider was set to 2, the length of the fragile portion was set to 900 mm, the length from the lock ring was set to 50 mm, and the installation angle of the lock holding opening from the fragile portion was set to 0 degrees and 180 degrees for the test. The results are shown in Table 1 below. The lock ring was deformed into an ellipse, the leg of the lock spider was removed, and the lid flew, so the safety was x.

[Comparative Example 2]
The test was conducted in the same manner as in Comparative Example 1 except that the number of legs of the lock spider was three and the installation angle of the lock holding opening from the fragile part was 30 degrees, 90 degrees, and 150 degrees. The results are shown in Table 1 below. The lock ring was deformed into an ellipse, the leg of the lock spider was removed, and the lid flew, so the safety was x.

[Comparative Example 3]
Two weak parts are provided at intervals of 90 degrees, and the installation angle of the lock holding opening from one of the weak parts is 0 degree and 120 degrees (two points), as in Comparative Example 2. Tested. The results are shown in Table 1 below. The lock ring was deformed into a triangular ellipse shape, and the legs of the three lock spiders were disengaged, but the safety was x because the lid flew.

[Comparative Example 4]
The test was conducted in the same manner as in Comparative Example 1 except that the length from the lock ring was 400 mm, the weakened portion was shifted, and the length was shortened to 650 mm. The results are shown in Table 1 below. The lock ring was almost deformed, but the leg of the lock spider was deformed, and the lid could not be fly because it could be removed by a simple manual operation, but the safety was Δ.

[Example 1]
The number of legs of the lock spider was set to 2, the length of the weak part was 750 mm, the length from the lock ring was 300 mm, and the installation angle of the lock holding opening from the weak part was 90 degrees (2 points). In the same manner as in Comparative Example 1, the test was performed. The results are shown in Table 1 below. The lock ring was slightly elliptical, the leg of the lock spider was fixed to the lock ring, and the lid did not fly.

[Example 2]
The test was performed in the same manner as in Comparative Example 1 except that the installation angle of the lock holding opening from the fragile portion was 45 degrees, 75 degrees, and 165 degrees. The results are shown in Table 1 below. The lock ring was deformed into an ellipse, the leg of the lock spider sunk into the lock ring, and the lid did not fly, so the safety was ○.

[Example 3]
A test was conducted in the same manner as in Comparative Example 4 except that the installation angle of the lock holding opening from the fragile portion was 90 degrees (two points). The results are shown in Table 1 below. The lock ring was deformed into an ellipse, one of the three lock spider legs was disengaged, the other two were sunk into the lock ring, and the lid did not fly.

[Example 4]
The test was performed in the same manner as Comparative Example 2 except that the lock spider legs were set at three angles of 60 degrees (two points) and 180 degrees with respect to three legs of the lock spider. The results are shown in Table 1 below. The lock ring was deformed into an ellipse, one of the three lock spider legs was disengaged, the other two were sunk into the lock ring, and the lid did not fly.

[Example 5]
Installation of the lock retaining opening from the weak part except that two weak parts are provided diagonally, and the installation angle of the lock retaining opening from one of the weak parts is 0 degrees and 120 degrees (two points) The test was performed in the same manner as in Comparative Example 3 except that the angles were 0 degrees and 120 degrees (2 points). The results are shown in Table 1 below. The lock ring was deformed into an ellipse, and one of the three lock spider legs was removed, the other two were sunk into the lock ring, and the lid did not fly.

  By using an ammunition container having a fragile portion according to the present invention, even when a lid having a lock spider is used, explosives are ignited inside the container while maintaining the drop strength and airtightness at the normal time. In the event of an emergency, it is possible to reliably avoid the explosion of the container and the scattering of the container lid to suppress the surrounding damage. That is, in the ammunition container having a fragile portion according to the present invention, by providing an appropriate fragile portion at a specified location according to the burning speed of the internal gunpowder, pressure release is realized without scattering the lid. it can. Therefore, the present invention can be suitably used as an ammunition container.

A Length of vulnerable part B Length from lock ring C Installation angle of lock holding opening from vulnerable part

Claims (6)

A cylindrical ammunition container used as a packing container for ammunition or ammunition,
The container has a bottomed cylindrical container body and a lid that closes the opening of the container body,
The cylindrical part of the container main body is provided with a weak part having a predetermined shape and a predetermined length, and the weak part is on a circumference closer to 300 mm from the following lock ring fixed to the opening of the container. The container is sealed by providing a sealing means on the weak part, and one on the other side of the weak part.
The lid can be opened to remove the charge or ammunition and has a locking mechanism;
The locking mechanism is
(A) a lock ring fixed to the opening of the container, wherein the lock ring has a lock holding opening, followed by a lock holding opening, and a support part;
(B) a splined guard cover having a segment portion that is compatible with the lock ring and has an outer diameter slightly smaller than the diameter of the ring running on the inner end of the support portion;
(C) a lock spider having a mechanism for tightening by turning or folding it, wherein the spider is designed to be inserted into the lock holding opening and pressed against the lock holding surface Have legs;
Comprising
At least two of the lock holding openings at a position 45 degrees or more and 135 degrees or less away from one fragile portion in the cylinder at an angle in a circumferential direction of the cylinder,

A container for ammunition as described above.   The length of the cylindrical portion of the container body is 600-1500 mm, the diameter of the lock ring is 50-300 mm, the total length of the fragile portion is 150-1000 mm, and the long hole of the fragile portion is 2 ~ 100mm, the gap between the long holes is 0.1 to 1mm, the joint is 1 to 5mm, the wall thickness of the cylinder is 1 to 2mm, and the wall thickness of the lid is 2 to 4mm, Item 2. The ammunition container according to Item 1.   The fragile portion is a stitch shape in which the inner and outer through holes or the inner and outer through holes and the joint portion are linearly formed, or a cut shape whose thickness is thinner than the peripheral portion, and is processed so that the breaking strength is lower than the peripheral portion. The ammunition container according to claim 1 or 2, which is a part.   The ammunition container according to any one of claims 1 to 3, wherein the lock holding opening into which the leg of the lock spider is inserted is an L-shaped hook obtained by pressing and deforming a support portion of the lock ring inward.   The ammunition container according to any one of claims 1 to 4, wherein the sealing means is filling the gap with an adhesive or a coating agent that decomposes and burns by heat.   The three lock holding openings are located at positions separated by approximately 120 °, and the angle in the circumferential direction of the cylinder is approximately 10 ° from one fragile portion of the cylinder, or a position separated by 50 ° or more and 70 ° or less. The ammunition container according to claim 1, further comprising at least one lock holding opening.