Bullet trapping device

Abstract

This makes it possible to reliably position the bullet-stopping structure regardless of the internal condition of the transport container used as the outer shell of the bullet-catching device. [Solution] The bullet catching device S comprises an outer shell 1 made of a transport container, a frame 11 assembled inside the outer shell 1, and a bullet stopping structure 20 attached to the frame 11. The bullet stopping structure 20 includes a back steel plate 21 fixed to the frame 11 and an impact absorbing plate 23 attached to the back steel plate 21. Since the bullet stopping structure 20 is positioned via the frame 11, it is less affected by the internal state of the outer shell 1 and is not exposed to the outer surface of the outer shell 1. An opening 5 is formed in one side wall 3d of the outer shell 1, and the impact absorbing plate 23 is positioned on the inner side of the outer shell 1 along the inner surface of the outer shell 1. This bullet catching device S can be used as a shooting training facility that is easy to transport and install.

Description

Technical Field

[0001] The present invention relates to a bullet-catching device, and more particularly to a bullet-catching device constructed using a transport container.

Background Art

[0002] The shooting training of police officers and self-defense forces is generally carried out in a dedicated training facility prepared indoors. However, indoor training facilities cannot be constructed anywhere. Therefore, in Patent Document 1, a bullet-catching device that can be installed outdoors by using a transport container has been proposed.

[0003] Patent Document 1 describes constructing a bullet-catching device by arranging a bullet-catching structure on the outer surface or inner surface of a transport container, the bullet-catching structure being composed of a special steel plate having a strength that bullets cannot penetrate and a catching elastic body that covers one surface of the special steel plate.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] According to Patent Document 1, since a transport container is used for the outer shell of the bullet-catching device, advantages such as being able to be transported and installed by general vehicles such as trucks, trailer cranes, and heavy machinery are obtained. However, when the bullet-catching structure composed of a special steel plate and a catching elastic body is arranged on the outer surface of the transport container, this bullet-catching structure becomes a protrusion on the surface of the transport container, so there is a risk of becoming an obstacle during transportation and installation.

[0006] Furthermore, the inner surface of a shipping container may contain protrusions or structures, which could hinder the securing of special steel plates when the bullet-catching structure is placed on the inner surface of the shipping container.

[0007] In view of the above-mentioned problems, the present invention aims to provide a bullet catching device that utilizes a transport container, which does not require the bullet-stopping structure to be placed on the outer surface of the transport container, and which allows the bullet-stopping structure to be placed inside the transport container regardless of the inner surface condition of the transport container. [Means for solving the problem]

[0008] To solve the above problems, the invention described in claim 1 is a bullet catching device for capturing a fired bullet, comprising an outer shell made of a transport container, a frame assembled inside the outer shell using column members and beam members, and a bullet stopping structure attached to the frame, wherein the bullet stopping structure includes an impact absorbing plate that absorbs the kinetic energy of the impacting bullet and a back steel plate positioned on the back side of the impact absorbing plate, and the back steel plate is fixed to the frame.

[0009] In this configuration, the bullet-catching device is constructed by attaching the bullet-stopping structure to a frame assembled inside an outer shell made of a transport container. Furthermore, the bullet-stopping structure is not exposed on the outer surface of the outer shell.

[0010] The invention described in claim 2 is the configuration of the invention described in claim 1, wherein an opening is formed in the side wall portion of the outer shell, a projectile stopping structure is arranged along the inner surface of the outer shell excluding the side wall portion in which the opening is formed, and the impact absorbing plate of the projectile stopping structure is located on the inner side of the outer shell relative to the back steel plate.

[0011] In this configuration, bullets entering the interior of the outer shell through the opening are captured by the bullet-stopping structure. Furthermore, the side walls of the outer shell have openings.

[0012] The invention described in claim 3 is the configuration of the invention described in claim 1 or claim 2, wherein at least a part of the bullet-stopping structure has a separation between the shock-absorbing plate and the back steel plate that is greater than the total length of the bullet.

[0013] With this configuration, a space of a predetermined width is formed between the shock-absorbing plate and the back steel plate.

[0014] The invention described in claim 4 is the configuration of the invention described in claim 3, wherein a spacer member is fixed to one side of the back steel plate, the dimension of the spacer member protruding from this side is greater than the total length of the bullet, and an impact absorbing plate is fixed to the spacer member.

[0015] With this configuration, the spacer members that fix the shock-absorbing plate ensure a predetermined distance between them. [Effects of the Invention]

[0016] As described above, the invention described in claim 1 constructs a bullet-catching device by attaching a bullet-stopping structure to a frame body assembled inside an outer shell made of a transport container. Therefore, the bullet-catching device can be constructed without being affected by the internal condition of the outer shell. Furthermore, since the bullet-stopping structure is not exposed on the outer surface of the outer shell, the transport, installation, and stacking of multiple bullet-catching devices can be easily carried out using existing container vehicles and heavy machinery.

[0017] The invention described in claim 2, in addition to the effects of the invention described in claim 1, allows the bullet catching device to be used as a shooting training facility because bullets entering the interior of the outer shell through the opening are caught by the bullet-stopping structure. Furthermore, since the side walls of the outer shell have openings, the work of constructing the bullet-stopping structure inside the outer shell can be carried out efficiently.

[0018] The invention described in claim 3, in addition to the effects of the invention described in claim 1 or claim 2, has a predetermined width of space formed between the shock-absorbing plate and the back steel plate, so that the bullet can easily penetrate the shock-absorbing plate and is less likely to remain inside the shock-absorbing plate, and since the bullet that penetrates the shock-absorbing plate collides with the back steel plate and stops, the bullet can be easily recovered.

[0019] In addition to the effects of the invention according to claim 3, in the invention according to claim 4, since the spacer member for fixing the shock absorption plate secures a separation of a predetermined width, it is easy to form a space of a predetermined width between the shock absorption plate and the back steel plate.

Brief Description of the Drawings

[0020] [Figure 1] It is a perspective view showing one embodiment of a bullet capturing device according to the present invention. [Figure 2] It is a perspective view showing an example of an outer housing (transport container) constituting the bullet capturing device shown in FIG. 1. [Figure 3] It is a perspective view showing an example of the internal structure of the bullet capturing device shown in FIG. 1. [Figure 4] It is a perspective view showing an example of a frame body constituting the bullet capturing device shown in FIG. 1. [Figure 5] It is a cross-sectional view at the X-X line position of the frame body shown in FIG. 4. [Figure 6] It is a perspective view showing a situation where back steel plates are arranged on the ceiling portion and the floor portion of the frame body shown in FIG. 4. [Figure 7] It shows a back steel plate to be arranged on the ceiling portion, where (A) is a bottom view, (B) is a front view, and (C) is a side view. [Figure 8] It shows the installation situation of the back steel plate on the ceiling portion, where (A) is a view seen from the bottom side (below), and (B) is a view showing an enlarged connection portion between adjacent back steel plates. [Figure 9] It is a perspective view showing a situation where an auxiliary plate for attaching a back steel plate for a side wall portion is fixed to a column member of the frame body shown in FIG. 6. [Figure 10] It is an exploded perspective view for explaining how to fix an auxiliary plate to a column member of the frame body. [Figure 11] It is a perspective view showing a situation where an auxiliary plate is fixed to a column member of the frame body. [Figure 12]This is an exploded perspective view illustrating how to attach the back steel plate for the side wall to the auxiliary plate fixed to the column member of the frame. [Figure 13] This is a perspective view showing the frame body with the back steel plates for the side walls attached. [Figure 14] This is a plan view showing the frame body with the back steel plates for the side walls attached. [Figure 15] This is a perspective view showing the frame body with the back steel plates attached to each side. [Figure 16] This is an exploded perspective view illustrating how to attach the shock-absorbing plate to the rear steel plate attached to the frame. [Figure 17] This is a perspective view showing the construction of a bullet-stopping structure by attaching an impact-absorbing plate to the rear steel plate. [Figure 18] This is a perspective view showing the bullet-stopping structures constructed on each surface of the frame. [Figure 19] This is a cross-sectional view at the PP line position shown in Figure 18. [Figure 20] This is a cross-sectional view at the QQ line position shown in Figure 18. [Figure 21] This is a cross-sectional view at the RR line position in Figure 18. [Modes for carrying out the invention]

[0021] Figure 1 is a perspective view showing one embodiment of the bullet catching device according to the present invention, Figure 2 is a perspective view showing an example of the outer shell (transport container) constituting the bullet catching device shown in Figure 1, and Figure 3 is a perspective view showing an example of the internal structure of the bullet catching device shown in Figure 1.

[0022] The bullet catching device S according to the present invention consists of an outer shell 1 formed using a transport container and an internal structure 10 constructed inside the outer shell 1. The internal structure 10 comprises a frame body 11 assembled using column members (vertical support members) 13 and beam members (horizontal support members) 12, 14, and a bullet stopping structure 20 attached to the frame body 11.

[0023] Referring to Figure 2, the outer shell 1 utilizes a shipping container manufactured in accordance with ISO standards. ISO standards specify containers with lengths ranging from 10 to 45 feet, and in this example, a 20-foot or 40-foot dry container, which is in high volume, is used. Dry containers generally have a ceiling 2 made of steel plate, side walls 3 (3a to 3d) made of corrugated steel plate, and a floor 4 often covered with plywood. Furthermore, since 20-foot or 40-foot containers are in high volume, they have the advantage of having many means available for transportation, transfer, and installation.

[0024] The frame 11 of the internal structure 10 is assembled using a steel frame structure. Details of its structure and assembly procedure will be described later.

[0025] The bullet-stopping structure 20 includes an impact-absorbing plate 23 that absorbs the kinetic energy of the impacting bullet to prevent ricochet, and a back steel plate 21 positioned on the back side of the impact-absorbing plate 23, the back steel plate 21 being fixed to the frame body 11.

[0026] The impact-absorbing plate 23 absorbs the kinetic energy of a projectile by embedding or penetrating it upon impact, thereby preventing ricochets. For example, crushed or pulverized rubber or plastic is solidified with an adhesive or synthetic resin and molded into a plate or block shape. One example is Regupol (registered trademark), a molded product in which rubber chips from crushed waste tires are integrated with synthetic resin.

[0027] Other firearms that fire bullets include pistols, rifles, and machine guns.

[0028] The back steel plate 21 can be any material that has sufficient strength and thickness to withstand the impact of a fired bullet without being destroyed or penetrated. For example, it can be made of rolled steel for general structural use such as SS material, rolled steel for welded structures such as SM material, carbon steel such as S45C, Swedish steel, or other types of steel.

[0029] In this example, one side wall 3d along the longitudinal direction of the outer shell 1 was widely cut away to form an opening 5. Then, along the inner surfaces of the other side walls 3a to 3c, the ceiling 2, and the floor 4, excluding the side wall 3d where the opening 5 was formed, a bullet-stopping structure 20 was arranged, configured such that the impact-absorbing plate 23 is positioned inward from the back steel plate 21. With this configuration, the bullet-catching device S can capture bullets that enter the interior of the outer shell 1 through the opening 5 using the bullet-stopping structure 20. Therefore, by setting an appropriate target (not shown) inside the outer shell 1 or in front of the opening 5, this bullet-catching device S can be used as a shooting training facility. Furthermore, by forming the opening 5 in the side wall 3d, it is possible to easily load materials and allow people to enter and exit through this opening 5, which has the advantage of improving the efficiency of the work of constructing the internal structure 10, which will be described later, inside the outer shell 1.

[0030] The following describes the procedure for constructing the internal structure 10, which consists of a frame body 11 and a projectile stopping structure 20, inside the outer shell 1. Although this work is carried out inside the outer shell 1, the outer shell 1 is omitted from the diagrams for the sake of clarity.

[0031] Figure 4 is a perspective view showing an example of a frame body that constitutes the bullet capture device shown in Figure 1, and Figure 5 is a cross-sectional view of the frame body shown in Figure 4 at the position of line XX.

[0032] Referring to Figures 4 and 5, first, a frame body 11 is constructed inside the outer shell 1, which has an opening 5 formed as described above. In this example, the frame body 11 is a rectangular parallelepiped steel structure whose main components are column members 13 (13a to 13e) which are vertical support members, and upper and lower beam members 12 (12a to 12e) and 14 (14a to 14e) which are horizontal support members. Reinforcing brace members 15 are attached to each side (excluding the area where the opening is formed). In addition, multiple steel plate support members 16 (16a to 16d), which will be described later, are arranged along the longitudinal direction on the ceiling of the frame body 11 to support the back steel plate 21a. In this example, square steel pipes are used for the steel plate support members 16 and are fixed with bolts and nuts to the lower surfaces of the opposing upper beam members 12a and 12d, respectively, which are aligned along the short direction.

[0033] In this example, the column member 13 supporting the vertical load is made of square steel pipe, which has relatively high strength and high stability when erected. On the other hand, L-shaped steel is used for the upper and lower beam members 12 and 14 and the brace member 15, taking into consideration strength and lightness.

[0034] Each column member 13 has an L-shaped first bracket 17 fixed to it by welding or the like near the upper and lower ends of each of the two adjacent sides, with the L-shaped side end faces fixed to it. The first bracket 17, when fixed to the column member 13, has a horizontal part and a vertical part. The horizontal part is used to connect the column member 13 to the beam members 12 and 14, and the vertical part is used to attach the brace member 15. In addition, a second bracket 18 for attaching an auxiliary plate 40 used to attach the back steel plate 21, which will be described later, is fixed to each column member 13 by welding or the like near the first bracket 17.

[0035] The external dimensions of the frame body 11 are set appropriately according to the dimensions of the outer shell body 1. Specifically, it is desirable to set the dimensions so that there is a gap of about 40 to 60 mm between the frame body 11 and the inner surface of the outer shell body 1, so that the assembly of the frame body 11 is not hindered even if there are protrusions or structures on the inner surface of the outer shell body 1.

[0036] To assemble the frame 11 described above, first, two column members 13 at positions corresponding to one side and upper and lower beam members 12 and 14 placed between these two column members 13 are connected to form a rectangular framework. For example, when forming a framework with column members 13a and 13b and beam members 12a and 14a as shown in Figure 5, the beam members 12a and 14a are connected by fixing the ends of each beam member 12a and 14a to the horizontal portion of the first bracket 17 of the column members 13a and 13b with bolts and nuts. Next, the formed framework is raised upright, and the same procedure is performed on the column members 13 and beam members 12 and 14 at positions corresponding to the other side, thereby sequentially connecting them and constructing a rectangular parallelepiped frame on the floor 4 of the outer shell 1. Furthermore, reinforcing brace members 15 are placed in an X-shape between the column members 13a to 13e corresponding to each side of the frame 11 (excluding the openings). The brace members 15 are attached with bolts and nuts to the first brackets 17 fixed to the column members 13a to 13e. The intersections 15a of the brace members 15 may also be connected with bolts and nuts. Finally, both ends of the steel plate support members 16 (16a to 16d) are fixed to the opposing beam members 12a and 12d on the upper side, respectively. The brace members 15 are omitted from the side sections corresponding to the openings 5 ​​of the outer shell 1, as no projectile stopping structure is attached to these sections, thus minimizing strength issues.

[0037] As described above, once the frame body 11 is assembled inside the outer shell 1, the next step is to position the projectile stopping structure 20 relative to the frame body 11. In this example, the projectile stopping structure 20 is constructed by first attaching the rear steel plate 21 to the frame body 11, and then attaching the shock-absorbing plate 23 to the rear steel plate 21.

[0038] Figure 6 is a perspective view showing the arrangement of back steel plates on the ceiling and floor of the frame shown in Figure 4. Figure 7 shows the back steel plates arranged on the ceiling, where (A) is a bottom view, (B) is a front view, and (C) is a side view. Figure 8 shows the installation of the back steel plates on the ceiling, where (A) is a view from the bottom (below), and (B) is a magnified view of the connection between adjacent back steel plates.

[0039] Referring to Figure 6, first, the back steel plates 21a and 21b are placed on the ceiling and floor portions of the frame body 11. For the floor portion, the back steel plate 21b is placed on the floor surface of the outer shell body 1 within the area enclosed by the lower beam members 14a to 14e.

[0040] Referring to Figure 7, the back steel plate 21a, which is placed on the ceiling, has L-shaped angle members attached to the center of each of the opposing edges along its longitudinal direction on its bottom surface, and a connecting portion 31 projecting downward is provided. To install this back steel plate 21a on the ceiling, the back steel plate 21a is lifted up to the top of the ceiling from inside the frame body 11, passing between the steel plate support members 16a to 16d, and then placed on the upper surface of the steel plate support members 16a to 16d. Then, as shown in Figure 8, the connecting portions 31 of adjacent back steel plates 21a are connected with bolts 32 and nuts 33 to integrate multiple back steel plates 21a. This prevents some of the back steel plates 21a from shifting position due to vibrations during the transport of the bullet capture device S or the impact when a bullet hits.

[0041] Figure 9 is a perspective view showing the auxiliary plates for attaching the back steel plates for the side walls fixed to the column members of the frame body shown in Figure 6; Figure 10 is an exploded perspective view illustrating how to fix the auxiliary plates to the column members of the frame body; Figure 11 is a perspective view showing the auxiliary plates fixed to the column members of the frame body; Figure 12 is an exploded perspective view illustrating how to attach the back steel plates for the side walls to the auxiliary plates fixed to the column members of the frame body; Figure 13 is a perspective view showing the back steel plates for the side walls attached to the frame body; Figure 14 is a plan view showing the back steel plates for the side walls attached to the frame body; and Figure 15 is a perspective view showing the back steel plates attached to each surface of the frame body.

[0042] As described above, once the back steel plates 21a and 21b are placed on the ceiling and floor sections, the back steel plates 21c to 21f are then attached to the side sections. Auxiliary plates 40a to 40g are used to place the back steel plates 21c to 21f on the side sections (see Figure 9). The procedure for attaching the back steel plates 21 using auxiliary plates 40a to 40g will be explained with reference to Figures 10 to 14. Figures 10 to 14 show the procedure for attaching the back steel plates 21c and 21d to the upper side of the column member 13c erected in the longitudinal center of the frame body 11 as a representative example, but the procedure for attaching them to other locations is almost the same.

[0043] Referring to Figure 10, the auxiliary plates 40d and 40e are made of steel plates having an overall length equal to or slightly shorter than that of the column member 13c, and are equipped with a bolt portion 41 provided by fixing a bolt with the threaded portion protruding to the surface side, and an opening 42 for inserting a mounting bolt 43. The bolt portion 41 is positioned to correspond to the mounting holes 24 (see Figure 12) formed in the back steel plates 21d and 21e. The opening 42 is formed to correspond to the opening 19 formed in the second bracket 18 of the column member 13c. Referring to Figure 11, these auxiliary plates 40d and 40e are attached to the column member 13c by inserting a mounting bolt 43 that has passed through the opening 42 into the opening 19 of the second bracket 18, and tightening it by screwing on a nut 44.

[0044] Referring to Figure 12, the back steel plates 21d and 21e, which are attached to the auxiliary plates 40d and 40e fixed to the column member 13c, have mounting holes 24 corresponding to the bolt portions 41 of the auxiliary plates 40d and 40c, and spacer members 22 are arranged on their surfaces. The spacer members 22 are made of, for example, C-shaped steel or square steel pipes, and are for forming a gap when the impact absorbing plate 23, which will be described later, is inserted. This gap dimension is set to be larger than the total length of the bullet that is expected to be used. In addition, in this example, the column member 13c is sandwiched between the back steel plates 21d and 21e, so a cover steel plate 46 is arranged to cover the gap between the edges of the back steel plates 21d and 21e in order to protect the column member 13c. The cover steel plate 46 is a flat plate and has openings 47 corresponding to the positions of the bolt portions 41 of the auxiliary plates 40d and 40e.

[0045] To attach the back steel plates 21d and 21e, the bolt portions 41 of the auxiliary plates 40d and 40e are inserted through the mounting holes 24 of the back steel plates 21d and 21e, temporarily fastening the back steel plates 21d and 21e to the auxiliary plates 40d and 40e. At this time, it is desirable to attach the back steel plates 21d and 21e by stacking them from the bottom up, from the floor side towards the ceiling side. Then, the bolt portions 41 protruding from the back steel plates 21d and 21e are inserted through the openings 47 of the cover steel plate 46, and nuts 45 are screwed onto the bolt portions 41 protruding to the surface side and tightened. As a result, as shown in Figures 13 and 14, a structure is obtained in which the back steel plates 21d and 21e are attached to the column members 13c, and the column members 13c between the back steel plates 21d and 21e are protected by the cover steel plate 46. Similarly, by using auxiliary plates 40a to 40f, a structure can be obtained in which the back steel plates 21c to 21f are arranged on each side of the frame body 11 (see Figure 15).

[0046] In this example, auxiliary plates 40a to 40f, which have bolt sections 41 pre-installed in predetermined positions, are used to attach the back steel plates 21c to 21f of the side sections, allowing for efficient installation of the back steel plates 21c to 21f. Since the auxiliary plates 40a to 40f are attached to the second brackets 18 fixed to the top and bottom of the column members 13a to 13e, less processing is required on the column members 13a to 13e. Even if the specifications of the back steel plates change, only the configuration of the auxiliary plates needs to be modified, eliminating the need to modify or change the column members.

[0047] Figure 16 is an exploded perspective view illustrating how to attach the shock-absorbing plate to the rear steel plate attached to the frame; Figure 17 is a perspective view showing the construction of the projectile-stopping structure by attaching the shock-absorbing plate to the rear steel plate; and Figure 18 is a perspective view showing the construction of the projectile-stopping structure on each surface of the frame.

[0048] Next, the shock-absorbing plates 23 are attached to the back steel plates 21 positioned between the column members 13. Referring to Figure 16, the shock-absorbing plates 23 are relatively thick, flat molded bodies. In this example, through holes 26 for inserting fixing screws 25 such as tapping screws are formed at at least four corners of the shock-absorbing plate 23 as seen from the surface side, but these through holes 26 may be omitted. When forming through holes 26, the vertical spacing of the through holes 26 is set to correspond to the vertical spacing of the spacer members 22 attached to the surfaces of the back steel plates 21d and 21e. Therefore, by inserting the fixing screws 25 through the through holes 26 of the shock-absorbing plate 23 and screwing them into the spacer members 22, the shock-absorbing plates 23 are attached to the back steel plates 21d and 21e via the spacer members 22. It is desirable that this installation work of the shock-absorbing plates 23 be carried out by stacking them sequentially from the bottom, moving from the floor towards the ceiling. In this case, the insertion position of the fixing screw 25 corresponds to the spacer member 22, so the shock-absorbing plate 23 is securely fixed. If a through hole 26 is not formed, the fixing screw 25 can be screwed into the shock-absorbing plate 23 in alignment with the position of the spacer member 22. Furthermore, if the shock-absorbing plate 23 has no distinction between front and back and has a square shape when viewed from the front, the consideration of orientation when placing it is reduced, thus improving work efficiency.

[0049] Referring to Figure 18, the impact-absorbing plates 23 are attached to each of the rear steel plates 21c to 21f placed on each side portion of the frame body 11, as described above, thereby constructing the bullet-stopping structure 20 of the side wall.

[0050] Figure 19 is a cross-sectional view taken at the position indicated by the PP line in Figure 18. Note that in Figure 19, the impact absorbing plate and the back steel plate are partially omitted.

[0051] Referring to Figure 19, the side wall portion of the internal structure 10 has a structure in which a space D is formed between the shock-absorbing plate 23 and the back steel plate 21d by a spacer member 22. The protrusion dimension of the spacer member 22 from the back steel plate 21d is set to be larger than the total length of the bullet intended for use. Therefore, the separation dimension T1 of the space D formed between the shock-absorbing plate 23 and the back steel plate 21d is larger than the total length of the bullet intended for use. In addition, the thickness dimension T2 of the shock-absorbing plate 23 is set to a dimension such that the fired bullet does not remain inside and penetrates with its kinetic energy sufficiently reduced. With this configuration, the fired bullet penetrates the shock-absorbing plate 23, collides with the back steel plate 21d, stops, and falls. Therefore, the risk of the fired bullet remaining inside the shock-absorbing plate 23 is reduced, making efficient bullet recovery easier.

[0052] Furthermore, the separation dimension T1 of space D and the thickness dimension T2 of the shock-absorbing plate 23 are set according to the type of bullet to be used. The type of bullet is determined by the type of firearm used for shooting. When the firearm used is a handgun, the total length of the corresponding bullet is generally around 20-30 mm. When it comes to rifles and machine guns, the total length of the corresponding bullet is generally around 40-50 mm. Therefore, the separation dimension T1 of space D is set appropriately to a dimension larger than the total length of the bullet to be used, for example, in the range of T1 = 30-80 mm.

[0053] On the other hand, the thickness T2 of the shock-absorbing plate 23 should be such that a bullet can penetrate the shock-absorbing plate 23, and after penetration, the bullet and its fragments, upon impact with the back steel plate 21 and ricocheting, are trapped in space D without penetrating the shock-absorbing plate 23. For example, if Legpol is used for the shock-absorbing plate 23, a T2 of 43 mm should be used for handguns and rifles.

[0054] Figure 20 is a cross-sectional view at the position of line QQ in Figure 18, and Figure 21 is a cross-sectional view at the position of line RR in Figure 18. Note that the column members are not shown in Figure 20.

[0055] Referring to Figure 20, the ceiling portion of the frame body 11 is constructed by attaching the shock-absorbing plate 23 to the lower surface of the steel plate support members 16a to 16d with fixing screws 25, thereby creating the bullet-stopping structure 20 in the ceiling portion. Thus, in the bullet-stopping structure 20 in the ceiling portion, a space E is formed between the shock-absorbing plate 23 and the back steel plate 21a by the steel plate support members 16a to 16d attached to the beam member 12a. The separation dimension T3 of this space E is set to be larger than the total length of the bullet intended for use. This reduces the risk of the fired bullet remaining inside the shock-absorbing plate 23 by setting the thickness dimension T4 of the shock-absorbing plate 23a to a dimension that allows the bullet to pass through easily without remaining inside, and makes bullet recovery easier, similar to the side wall portion.

[0056] Referring to Figure 21, the floor section of the bullet-stopping structure 20 is constructed by placing the shock-absorbing plate 23 on the upper surface of the back steel plate 21b. In the floor section of the bullet-stopping structure 20, the shock-absorbing plate 23b is placed directly on the upper surface of the back steel plate 21b, so that there is no gap between the shock-absorbing plate 23b and the back steel plate 21b. As a result, even if a user or worker steps on the floor, the shock-absorbing plate 23 is less likely to bend or deform, and the deterioration of the shock-absorbing plate 23 can be suppressed.

[0057] Furthermore, it is desirable that no gaps be created between adjacent back steel plates 21a to 21f, and between adjacent shock-absorbing plates 23. If there are gaps, the bullet may not be caught by the bullet-stopping structure 20 and may penetrate.

[0058] As a result of the above work, an internal structure 10 is constructed inside the outer shell 1, with bullet-stopping structures 20 placed in the ceiling, floor, and side walls (excluding the side walls corresponding to the openings), thereby obtaining the desired bullet-catching device S (see Figure 1). Since the placement of each bullet-stopping structure 20 is done via the frame body 11, it is less affected by the internal state of the outer shell 1 (presence or absence of protrusions or structures). Furthermore, since the bullet-catching device S in this example has an opening 5 in the side wall 3d, work inside can be carried out in a relatively bright environment. In addition, since materials necessary for the work can be brought in and out through this opening, it has the advantage of allowing work to proceed efficiently.

[0059] In this example of the bullet catching device S, the shock-absorbing plates 23 placed in each section are positioned further inward from the back steel plate 21 within the outer shell 1, and the surfaces of adjacent shock-absorbing plates 23 are flush, forming bullet-stopping surfaces 20s. Each bullet-stopping surface 20s follows the inner surface of the ceiling, floor, and side walls of the outer shell 1, respectively. As a result, bullets that enter the interior through the opening 5 of the outer shell 1 are less likely to ricochet, and the bullet-stopping structure 20 can reliably capture the bullet. Therefore, by, for example, installing a target inside, the bullet catching device S in this example can provide a highly safe shooting training facility with easy bullet retrieval.

[0060] Furthermore, the bullet catching device S in this example is constructed with an outer shell 1 made from a transport container, and the bullet stopping structure 20 is not exposed on the outer surface of the outer shell 1. Therefore, by using a trailer or crane for containers, it is possible to provide a shooting training facility that is easy to transport and install.

[0061] In the above embodiment, the frame was constructed using square steel pipes and L-shaped steel, but C-shaped steel may also be used in combination. Alternatively, the frame may be constructed using only square steel pipes, only L-shaped steel, or only C-shaped steel.

[0062] Furthermore, in the above embodiment, the column members and beam members of the frame are connected with bolts and nuts, but it is also possible to connect them by welding or by using a pre-prepared interlocking structure.

[0063] Furthermore, the frame may have intermediate studs or furring strips added between the columns and beams as needed.

[0064] Furthermore, the frame body may be connected to the outer shell. For example, a rod-shaped or plate-shaped connecting auxiliary member can be placed between at least one point on the upper part of the column or upper beam and the inner surface of the outer shell, and fastened to each with bolts and nuts or welding. In this case, if a connecting structure is provided between the side wall portion with an opening in the outer shell and the upper beam, the work will be performed at the opening, which improves workability, and also has the advantage of reinforcing the side portion of the frame body that is not reinforced by bracing. Alternatively, the lower part of the column or lower beam can be fixed to the floor with angle brackets or the like. By integrating the outer shell and the frame body in this way, it is possible to suppress displacement of the frame body relative to the outer shell due to vibrations during transportation or impacts from bullet collisions.

[0065] Furthermore, in the above embodiment, the back steel plate of the side portion is attached to the frame body via an auxiliary plate, but the auxiliary plate may be omitted. In this case, for example, the back steel plate can be directly fixed to the column member of the frame body with bolts.

[0066] Furthermore, in the above embodiment, the impact absorbing plate is fixed to a spacer member attached to one surface of the back steel plate. However, the spacer member may be omitted, and the impact absorbing plate may be attached to a frame body separately assembled on the front surface of the back steel plate.

[0067] Furthermore, in the above embodiment, the frame body is assembled inside the outer shell before the projectile-stopping structure is attached to it. However, it is also possible to manufacture a unit in which the frame body and projectile-stopping structure are integrated beforehand, and then transport this unit into the outer shell to construct the internal structure. For example, one unit can be composed of a rectangular frame, a back steel plate attached to the frame, and an impact-absorbing plate attached to the frame or the back steel plate. In this case, considering the burden during work, the side walls and ceiling can be made by connecting multiple units inside the outer shell, and by reducing the weight per unit, it is possible to make it easier to handle. In addition, with this configuration, it is easy to accommodate changes in the size of the transport container used as the outer shell.

[0068] Furthermore, while it is desirable to install the back steel plates or shock-absorbing plates of the side walls in a stacked manner from bottom to top, they may also be installed in a stacked manner from top to bottom.

[0069] Furthermore, while it is considered most efficient to install the shock-absorbing panels in the order of ceiling, side walls, and then floor, this order is not restrictive, and you can start from any part.

[0070] Furthermore, in the above embodiment, since an opening is formed in the outer shell, a cover may be provided to close this opening when the bullet capture device is not in use or during transport.

[0071] Furthermore, to facilitate bullet retrieval, for example, the bottom shock-absorbing plate may be made removable, or a small gap may be provided between the bottom shock absorber and the floor, and the surface of the floor may be formed into an inclined surface shape, tapered surface shape, curved surface shape, etc., that slopes downward towards a specific point.

[0072] Incidentally, in the above embodiment, the bullet catching device was used as a shooting training facility, but it can also be used as a supply storage facility or a small bunker. When used as a supply storage facility, the bullet catching device is required to prevent bullets fired from the outside from reaching the internal storage space. For this reason, no openings are formed in the side walls of the outer shell, and the bullet stopping structure of the internal structure built inside the outer shell must be arranged so that the shock absorbing plate is located on the outside and the back steel plate is located on the inside. In this case, it is conceivable to provide a frame to support the shock absorbing plate located on the outside, and a separate frame to support the back steel plate inside that. It is also possible to directly attach the shock absorbing plate to the wall surface of the outer shell with bolts or screws, but in this case, if the wall surface of the outer shell is damaged by fired bullets, it may become difficult to hold the shock absorbing plate, so measures to address this need to be considered.

[0073] Furthermore, when used as a material storage facility, it is desirable that a portion of the outer shell and at least a portion of the projectile-stopping structure or frame be openable in order to allow for the loading and unloading of materials and the entry and exit of personnel into and out of the internal storage space.

[0074] Furthermore, when using a bullet catching device as a small shelter, it needs to be structured to catch bullets fired from the outside without penetrating them, similar to a supply storage facility. Therefore, the same internal structure as a supply storage facility should be adopted. However, since there is no need to store supplies inside, it is not necessary to make the outer shell, bullet stopping structure, and part of the frame structure openable and closable. [Explanation of Symbols]

[0075] 1…Outer shell 2…Ceiling 3, 3a~3d...Side wall part 4…Floor part 5…Aperture 10...Internal structure 11...Frame 12, 12a~12e...Beam material (upper side) 13, 13a~13e...Column material 14, 14a~14e...beam material (lower side) 15…Brace material 16, 16a~16d...Steel plate support material 20... Ammunition-stopping structure 20s...Stopping surface 21, 21a~21f...Back steel plate 22…Spacer member 23…Shock-absorbing plate 40, 40a~40g... Auxiliary plate 46...Cover steel plate D…Space E…Space S...Bullet capture device T1… Separation dimension T2...Thickness dimension T3... Separation dimensions T4...Thickness dimension In each figure, the same reference numeral indicates the same or corresponding part.

Claims

1. A bullet capture device for capturing fired bullets, The outer shell consists of a shipping container, Inside the aforementioned outer shell, there is a frame body assembled using column members and beam members, The frame body is equipped with a bullet-stopping structure, The bullet-stopping structure includes an impact-absorbing plate that absorbs the kinetic energy of the impacting bullet, and a back steel plate positioned on the back side of the impact-absorbing plate, the back steel plate being fixed to the frame body. Bullet trapping device.

2. The bullet capture device according to claim 1, wherein an opening is formed in the side wall of the outer shell, the bullet-stopping structure is arranged along the inner surface of the outer shell excluding the side wall portion in which the opening is formed, and the impact-absorbing plate of the bullet-stopping structure is located on the inner side of the outer shell relative to the back steel plate.

3. The bullet-catching device according to claim 1 or claim 2, wherein at least a portion of the bullet-stopping structure has a separation between the shock-absorbing plate and the back steel plate that is greater than the total length of the bullet.

4. The bullet capture device according to claim 3, wherein a spacer member is fixed to one side of the back steel plate, the dimension of the spacer member protruding from this side being greater than the total length of the bullet, and the shock-absorbing plate is fixed to the spacer member.

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