JP3559926B2 - Bomb stop - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bullet stopping device that captures a fired bullet behind a target without breaking it at a shooting range of a firearm, and particularly relates to a bullet stopping device that captures a bullet using a granular member.
[0002]
[Prior art]
Conventionally, as shown in FIG. 10, a shooting range includes a firing position where a shooter performing shooting is located, a target 2 disposed opposite to the firing position, a bulletproof pier 6 disposed in front of the target 2 (fire shooting side), and a target. , And a collecting groove 5 disposed below the steel-plated inclined backstop 4. In the case of applied shooting training, the firing point is not always determined.
[0003]
FIG. 11 is a view of the target viewed from the shooter side. In this example, the target 2 is movable in a direction orthogonal to the flight direction of the bullet, and the bulletproof ridge 6 prevents the bullet from damaging the moving mechanism of the target 2.
[0004]
When the shooter at the firing point fires an actual bullet with a handgun or rifle at the target, the fired bullet 8 flies toward the target. Any bullet that hits the target and hits the target directly hits the steel plate inclined backstop 4 and crushes, and hits the target penetrates the target and hits the steel plate inclined backstop 4 and crushes. . The crushed bullet changes its movement direction along the inclined backstop 4 made of steel as it crushes, and gathers in the collecting groove 5.
[0005]
[Problems to be solved by the invention]
However, the conventional steel plate tilt backstop has the following problems.
1) Bullet fragments may become trillion bullets and fly toward the shooter.
2) Lead powder is generated by bullet crushing on the steel plate surface, and the environment of the shooting range is polluted.
3) There is a risk that the worker may ingest lead powder during the work of collecting bullet fragments collected in the collecting groove 5.
The technique disclosed in Japanese Patent Publication No. Hei 5-20680 shown in FIG. 12 is a bullet stopping device proposed to solve these problems. In this technique, a granular member 14 is deposited behind a target, and a bullet is shot into the granular member, thereby avoiding crushing of the bullet and separating and recovering the bullet from the granular member. However, in this technique, since the granular member 14 is dropped from above and deposited, the surface on the firing point side of the formed deposition of the granular member becomes a slope of the repose angle θ of the granular member. Therefore, assuming that the required effective thickness t of the granular member for capturing the bullet in the shooting direction and the installation height of the bullet stopping device are H, the required installation depth D of the bullet stopping device is expressed by the following formula.
[0006]
D ≧ t + H / tan θ
In the case of a general shooting range, assuming that H = 4 m and the angle of repose θ of the granular member = 35 degrees, the required installation depth D of the ballistic stopping device is t + 5.7 m or more.
[0007]
On the other hand, if the angle of inclination of the deposited granular member on the firing point side can be made nearly vertical, D ≒ t, and the required depth of the ballistic stop device can be greatly reduced.
[0008]
FIG. 13 shows that the surface on the shooter side of the ballistic stop device is made of an elastic film material 13 and the granular member is filled in a casing fixed to the frame, whereby the inclination angle on the firing side of the ballistic stop device, that is, the deposited material is deposited. Fig. 4 shows a state of shooting training using a ballistic stop device in which the inclination angle of the front surface of the granular member is close to vertical. FIG. 14 is a cross-sectional view showing a state where the bullet stopping device of FIG. 13 changes as the number of shot bullets increases.
[0009]
When the number of shot bullets is small, the state is as shown in FIG. 14A. However, as the number of shot bullets increases, the state becomes as shown in FIG. 14C via FIG. 14B. This is due to the fact that a bullet penetrates through the elastic film material to damage the film material, and the weight of the granular member filled at the bottom acts as an internal pressure, causing swelling. Due to this swelling, the internal granular members are entirely lowered, and as shown in FIG. 14C, the bullet stopping performance of the upper part of the bullet stopping device is reduced, and crushing of bullets and trillion bullets occur. Bullet crushing causes the generation of fine lead powder and trillion bullets.
[0010]
Replenishing the upper part of the ballistic stop with a granular member in order to compensate for the bullet stopping performance of the upper part of the ballistic stopper increases the internal pressure of the granular member, resulting in acceleration of the swelling of the elastic film material.
[0011]
In addition, an increase in swelling means that the thickness of the bullet stopping device is greater than a required thickness, and requires many granular members, which is not preferable. In addition, with a bullet stopping device that is widened to the left and right, it is difficult to uniformly fill or unload the granular member when filling it from above or extracting it from below.
[0012]
That is, an object of the present invention is to reduce the required depth of the bullet stopping device, to prevent the granular member holding material from swelling up, down, left and right due to the shot, and to reduce the bullet capturing performance at the top of the bullet stopping device. There is to prevent.
[0013]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention provides a box-shaped bullet stopping device which is disposed behind a target of a live fire of a firearm and captures a bullet fired by a shooter toward the target with a deposited granular member. At least the shooter side surface of the container is formed of an elastic film material, a granular member is filled in the container, and an arbitrary portion excluding the peripheral portion of the elastic film material is connected to the rear wall surface of the container with a support member. It is characterized by the following. In this case, it is preferable that the container is provided with an inlet for the granular member at the upper part and an outlet for the granular member at the lower part.
[0014]
Moreover, by linking the rear wall of the container support members extending elastic film material in the vertical direction, is suppressed elongation in the vertical direction of the elastic film material, it can be prevented swelling in the vertical direction of the elastic film material. Also, in the left-right direction, since the granular member is divided by the support member, the granular member can be formed to have a uniform thickness without being biased in the left-right direction. , Can be extracted uniformly.
[0015]
In order to prevent the support member from being damaged by the bullet being shot, it is preferable that the support member be installed outside the area where the target is projected onto the elastic film material.
[0016]
Further, when a plurality of the targets are arranged side by side, it is preferable that the plurality of support members are dispersedly arranged at a position corresponding to the middle of the plurality of targets for the same reason.
[0017]
The target in the shooting training is usually a concentric circle or a criminal image as viewed from the shooter, and the concentric circle or the criminal image printed in a square area of 0.75 m in length and 0.75 m in width is used. In addition, since the evaluation of the shooting result becomes higher as being closer to the center of the concentric circle, almost 90% or more of the fired bullets pass through the target range (for example, the above-mentioned square range of 0.75 m in length and 0.75 m in width). The frequency with which the bullet passes through the target area is higher the closer to the center of the target.
[0018]
Therefore, a bullet stopping device that captures the fired bullets with the granular material filled therein is installed behind the target, and an elastic film material that holds the front surface of the filled granular member is provided. By arranging the support member for fixing and supporting the elastic film material at a position outside the area corresponding to the target range, damage to the support member and the fixed support portion of the elastic film material by bullets can be reduced. That is, swelling of the elastic film material toward the shooter can be reduced.
[0019]
The installation position of the support member, as described above, needs to be a position outside the region corresponding to the target range of the elastic film material, or an interval of 1-2 times the horizontal dimension of the target range, It is desirable to set the center position of the target arrangement interval.
[0020]
In the case of a shooting range in which the target is moved while moving in the lateral direction, the main reach of the bullet is a band-shaped area horizontally moved in the vertical direction of the target with the movement of the target. In this case, the support members may be installed at upper and lower positions outside the band-like region. It is necessary to select a material for the support member that is unlikely to cause bullet crushing, and may be the same material as the elastic film material constituting the firing-side surface of the bullet stopping device, or a cloth material, a cloth laminate material, or a mesh material. Any material may be used as long as it can transmit the internal pressure of the granular member, which is added to the elastic film material, to the inside of the bullet stopping device, to the structural material constituting the bullet stopping device.
[0021]
In addition, the connection between the support member and the elastic film material may be performed by any of fusion, bonding, sewing, and screwing. However, it is necessary to select a bonding method that does not cause crushing of a bullet that has landed on the bonding portion. .
[0022]
The bullets caught by the bullet stopping device are discharged from the lower portion of the bullet stopping device together with the granular members, and are separately collected. At this time, since the bullets are recovered in a substantially original shape, it is possible to prevent the worker from ingesting lead powder during the recovery operation. In addition, the separated granular members can be easily reused by returning them to the inside of the device from the upper portion of the bullet stopping device.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view showing a state in which a bullet stopping device 12 according to the present embodiment is installed behind a target 2 and a shooter 1 located at a firing position holds a handgun 3 in a shooting posture. A bulletproof levee 6 is arranged in front of the target 2 (on the firing side) so as to extend in a direction perpendicular to the flight direction of the bullet. The target 2 can be moved by a target driving device 7 in a direction parallel to the bulletproof ridge 6. In FIG. 1, the target 2 is shown turned 90 degrees for clarity.
[0024]
FIG. 2 is a view in which the target direction is viewed from the shooter side. In the bullet stopping device 12, the upper end in the height direction is located above the upper end of the target 2, and the lower end is located at the target position floor height of the shooting range. positioned. The lateral width of the bomb stop device 12 is larger than the width of the target 2 and is disposed over the entire moving range of the target 2.
[0025]
FIG. 3 shows a partially cutaway perspective view of the structure of the bullet stopping device 12. As shown in FIG. 3, the bullet stopping device 12 is formed in a flat rectangular box-like container, and has a casing structure reinforced with a frame, and is filled with a granular member (a chip-like elastic viscous member in the present embodiment) 14 therein. Have been. However, FIG. 3 does not show the granular member 14 filled therein.
[0026]
The front surface (the surface on the shooter side) of the rectangular box-shaped container is formed of an elastic film material 13 made of elastic viscous rubber, plastic, reinforced fiber cloth, mesh material, or a composite material having these materials attached or sandwiched. In addition, four rounds of the elastic film material 13 are supported by a bullet stopping device frame 16. The upper and lower left and right surfaces and the rear surface of the rectangular box-shaped container are formed by the bullet stopping device frame 16.
[0027]
In the present embodiment, the bullet stopping device 12 is installed such that the elastic film material 13 is substantially perpendicular to the horizontal plane.
[0028]
The upper and lower ends of the elastic film material 13 are held by the bullet stopping device frame 16 as described above, but in order to protect this portion from projectiles, the bulletproof structural member 17 is attached to the front surface of the upper and lower ends of the elastic film material 13. It is attached to. As the structure of the bulletproof structure member 17, a known structure (for example, JP-A-8-334297, JP-A-8-136194) may be used.
[0029]
A support member 18 that connects and fixes the casing 19 and the elastic film material 13 that form the rear wall surface is provided inside the bullet stopping device 12 so as to extend in the vertical direction. A plurality of support members 18 extending in the vertical direction are provided at intervals in the horizontal direction. In the present embodiment, the cross-sectional shape of the support member 18 is Z-shaped, but may be H-shaped. The length (or depth) of the support member 18 in the front-rear direction is the same as the inside dimension in the front-rear direction of the flat box-shaped container that constitutes the bullet stopping device 12. The rear surface is fixed. That is, the elastic film material 13 is restrained by the support member 18 so as not to bulge forward. The support member 18 is provided in the up and down direction, but is provided only in the middle portion in the up and down direction so that the filled granular member can move, and above and below the support member 18, from one side of the support member to the other. It is also possible to allow the granular member to move to the side.
[0030]
The elastic film material 13 of the bullet stopping device 12 has a function as a granular member holding material for holding the granular member 14 filled therein, and also has a function of passing a flying bullet to enter the internal granular member 14. The projectile does not shatter on the shooter-side surface of the bullet stop device 12 and is not repelled into trillion bullets, and the shot-side surface is not damaged by the impact when the bullet penetrates and is not scattered. As described above, the elastic film material 13 of the bullet stopping device 12 is formed of an elastic material, that is, an elastic material such as rubber, plastic, a reinforcing fiber cloth, a mesh material, or a composite material having an affixed or sandwiched structure thereof.
[0031]
FIG. 4 shows a horizontal section of the bullet stopping device 12. As shown in FIG. 4, the support member 18 is disposed at an intermediate position of the target 2, and fixes the elastic film material 13 to a casing 19 forming a rear wall of the bullet stopping device 12. The elastic film material 13 between the support members 18 swells toward the front side due to the internal pressure of the filled granular member.
[0032]
Next, a mechanism for capturing a bullet fired from the firing point will be described with reference to the schematic diagram of FIG. The bullet 8 arriving at the bullet stopping device 12 is captured by the bullet stopping device 12 while exhibiting a behavior of proceeding in the order of A0 → B0 → C0 → D0 in FIG. That is, the bullet 8 penetrates through the elastic film material 13 (B0), is deprived of the kinetic energy of the bullet by the granular member (tip-shaped elastic viscous member) 14, is decelerated (C0), and stops in the granular member 14. (D0).
[0033]
By disposing the support member 18 of the bomb stop device at a position outside the region immediately behind the target 2, that is, at a position between the plurality of targets 2, the granular member 14 added to the elastic film material 13 is removed. The internal pressure can be supported by the support member 18 and damage to the joint between the support member 18 and the elastic film material 13 due to the bullet 8 concentrated on the target is reduced. At the same time, the installation of the support member 18 can reduce the swelling of the elastic film material 13 toward the front side due to the damage of the elastic film material 13 due to a bullet being shot, and can maintain the function of the upper part of the ballistic stopping device as a bullet stopping device. .
[0034]
When the distance between the targets 2 is large, the support member 18 may be installed at a position outside the bullet concentration area around the target 2 (at least the area immediately behind the target 2), even if it is not necessarily at the intermediate position of the target 2. (A position out of the range). If the distance between the support members 18 is too large, the swelling of the elastic film material 13 in the middle of the support members increases, which is not preferable. The position of the support member 18 is desirably outside the region obtained by projecting the target 2 onto the elastic film material 13 in a direction perpendicular to the target surface of the target 2. As a guide of the interval between the support members 18, one to two times the width of the target 2 is appropriate.
[0035]
A second embodiment of the present invention will be described with reference to FIG. In the present embodiment, in the first embodiment, the bullet stopping device 12 is inclined at a wide angle with the floor. Other configurations are the same as those of the first embodiment. When the target is viewed from the shooter side, the state is the same as that in FIG. In the present embodiment, in addition to the effect of the first embodiment, the internal pressure of the granular member 14 applied to the elastic film 13 is reduced by inclining the elastic film 13 in the direction opposite to the shooter side. In addition, the swelling of the elastic film material 13 toward the shooter is suppressed. In this case, as compared with the one shown in FIG. 12, in the present embodiment, the granular member is covered with the elastic film material 13, so that the granular member does not scatter and the thickness of the bullet stopping device 12 can be reduced. .
[0036]
A third embodiment of the present invention will be described with reference to FIG. In this embodiment, in the first embodiment, the entirety of the bullet stopping device 12 is inclined toward the shooter side, and the bullet stopping device 12 is inclined at an acute angle with respect to the floor. . Other configurations are the same as those of the first embodiment. In the present embodiment, in addition to the effect of the first embodiment, by inclining the whole of the ballistic stop device 12 toward the shooter side, the angle between the ballistic stop device 12 and the floor becomes an acute angle, Compared to the one shown in FIG. 6, the required shooting range length behind the target can be reduced. In this case, the internal pressure of the granular member 14 applied to the elastic film material 13 increases. However, when the support member 18 is provided as in the present embodiment, the expansion of the elastic film material 13 toward the shooter is suppressed.
[0037]
A fourth embodiment of the present invention will be described with reference to FIGS. This embodiment corresponds to a case where the target 2 shoots in a state where the target 2 is moving in the left-right direction when viewed from the shooter. In this case, with the movement of the target 2, the main reach of the bullet becomes a band-shaped area horizontally moved in the vertical range of the target 2. As shown in the drawing, the support member 18 is divided and installed at upper and lower positions outside the band-like region to prevent the joint between the support member 18 and the elastic film material 13 from being damaged by bullets. is there.
[0038]
Also in the present embodiment, the same effect as in the first embodiment can be obtained by applying the present invention to a shooting range where shooting is performed while the target 2 is moving in the left-right direction as viewed from the shooter.
[0039]
【The invention's effect】
According to the present invention, since a plurality of support members are provided for restraining the granular member holding material to the rear, swelling of the granular member holding material on the shooter side in the up, down, left, and right directions is prevented, and filling of the predetermined section with the granular member, The ejection is also uniformed, and it is possible to prevent the bullet catching performance on the upper part of the bullet stopping device from being reduced.
[Brief description of the drawings]
FIG. 1 is a side view showing a first embodiment of the present invention.
FIG. 2 is a front view of the embodiment shown in FIG.
FIG. 3 is a partially broken perspective view of the embodiment shown in FIG. 1;
4 is a cross-sectional plan view of the embodiment shown in FIG. 1 taken along line BB. FIG. 5 is a cross-sectional plan view showing a bullet capturing state in the embodiment shown in FIG.
FIG. 6 is a side view showing a second embodiment of the present invention.
FIG. 7 is a side view showing a third embodiment of the present invention.
FIG. 8 is a front view showing a fourth embodiment of the present invention.
9 is a partially broken perspective view of the embodiment shown in FIG.
FIG. 10 is a side view showing an example of the related art.
11 is a front view taken along line CC of FIG. 10;
FIG. 12 is a side sectional view showing another example of the prior art.
FIG. 13 is a side sectional view showing still another example of the prior art.
FIG. 14 is a side sectional view showing an example of swelling in the conventional technique shown in FIG.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 archer 2 target 3 handgun 4 steel plate inclined backstop 5 bullet collecting groove 6 bulletproof ridge 7 target driving device 8 to 11 bullet 12 bullet stopping device 13 elastic film material 14 granular member (chip-shaped elastic viscous member)
16 Bullet stopping device frame 17 Bulletproof structure member 18 Support member 19 Casing

Claims (5)

A ballistic stop arranged behind a target of a live fire of a firearm and capturing a bullet fired by a shooter toward the target with a deposited granular member,
The surface of the front Symbol shooter side of the container of the box type made of an elastic film material, filling the particulate member in the container, the rear wall surface of any part of the vessel, excluding the peripheral portion of the elastic membrane material -Stop device that is connected to the support member. 2. The ballistic stopping device according to claim 1, wherein the container has an input port of the granular member at an upper part and an outlet of the granular member at a lower part. 3. 3. The bullet stopping device according to claim 1, wherein the elastic film material includes at least one of elastic rubber, plastic, reinforcing fiber cloth or mesh material, and a composite material thereof, The above-mentioned support member is the same material as the above-mentioned elastic membrane material, or a cloth-like material, a cloth lamination material, or a mesh material, characterized by the above-mentioned. 4. The ballistic stopping device according to claim 1, wherein the support member is arranged outside a region where the target is projected on the elastic film material. 5. 5. The bullet stopping device according to claim 1, wherein a plurality of the targets are arranged, and the plurality of support members are arranged at a position corresponding to a middle of the plurality of targets. 6. Characteristic bullet stop.

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