JP2014020689A - Backstop - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cheap backstop in which a bullet is collected easily without crushing.SOLUTION: A backstop 1 comprises an outside cover body 10 containing granular bullet-stopping members, and a lot of golf ball-like spheres 30 as the granular bullet-stopping members contained in the outside cover body 10. The outside cover body 10 comprises an outside frame member 11 and front-back surface members 13 covering front-back opening of the outside frame member 11. A bullet which passed the surface member 13 loses holding kinetic energy and stops while hitting many times to the many golf ball-like spheres 30. The stopped bullet stays in the space between the golf ball-like spheres 30, and gradually drops in its own weight downward. The bullet can be taken out and collected by arranging a takeout opening at the bottom of the outside cover body 10. A common abandoned tire is available as the outside frame member 11. Used or defective golf balls are available as the golf ball-like spheres 30.

Description

  The present invention relates to a backstop that is disposed behind a target and stops and collects bullets in an actual shooting training field. In particular, the present invention relates to a backstop that can be easily recovered without crushing bullets and is greatly improved in terms of economy.

  The backstops currently in use are those that use laminated rubber plates (see Patent Document 1) or those filled with granular members (see Patent Document 2) as materials that absorb the kinetic energy of bullets. Has been. The former, which uses laminated rubber plates, is a stack of synthetic resin or rubber plates that are vertically supported, and the bullet that penetrates the target passes through several plates, Fall to the surface. In addition, the portion where the bullets of the plate material on the front side are concentrated and incident can be exchanged. In the latter case, the granular member (chip) is filled in the hollow support portion having the lower inclined portion and the upper vertical portion, and the upper granular member moves downward. It has movement deterring means for deterring. Thereby, the bullets can be collected separately only in the region where the bullets are concentrated.

  However, these methods have the following problems. In the former laminated rubber plate system, the rubber plate material becomes a consumable item, which increases the cost. Furthermore, since some bullets remain in the plate material, it takes time to separate and collect the bullets, and it is necessary to remove the bullets when discarding the plate material. In the latter granular member filling method, considerable effort is required to separate and collect bullets. Further, since the granular member is repeatedly used for a long time and the bullet advances while rotating in the granular member, lead on the surface of the bullet adheres to the granular member in a large amount due to friction and accumulates. For this reason, at the time of bullet recovery, there is a possibility that this attached lead may be diffused into the shooting range.

Utility model registration No. 3135964 JP 2005-188894 A

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an inexpensive backstop that can be easily collected without causing the bullets to be crushed.

  The backstop of the present invention is a backstop that is disposed behind a target of actual bullet shooting training and receives a bullet that has passed through the target, and includes an outer casing that contains a granular stopping member, And a large number of golf ball-like spheres as the granular stopping members.

  According to the present invention, the bullet that has passed through the outer shell hits a large number of golf ball-like spheres many times, and loses the kinetic energy held between them to stop. The stopped bullet is in the space between the golf ball-like spheres and gradually falls downward due to its own weight. If an outlet is provided at the bottom of the outer cover, the bullet can be taken out and collected.

  The outer cover is a container that accommodates a large number of golf ball-like spheres. The material of the outer cover is one that does not reflect the bullet to the target side (it is difficult to jump), and the bullet through hole is closed after the hit bullet passes, and the strength is maintained after that. preferable. For example, natural rubber, synthetic rubber such as chloroprene, compressed rubber, synthetic resin material and the like can be used. The shape and size of the outer cover may be any shape as long as it can cover the rear of the target. It may be a disk, cylinder, square box, or the like.

  In addition, it is preferable to provide a space where no golf ball sphere exists in the upper part inside the outer cover so that the golf ball sphere can move freely to some extent. By providing such a space, it is possible to promote the movement of the golf ball due to the impact and vibration when the bullet is incident. Also, if the golf ball spheres inside are mixed back by periodically shaking the outer cover, etc., and the deviation of the position of the golf ball spheres is eliminated, the same golf ball spheres may stay at the positions where they are likely to land. In addition, the entire life of the golf ball sphere can be extended. Alternatively, it is possible to provide a mechanism that intentionally applies vibration, oscillation, rotation, etc. to the outer cover.

  A golf ball-like sphere refers to a sphere having strength, elasticity, hardness, surface friction coefficient, economy, etc., equivalent to or close to that of a golf ball, as described below. The sphere does not mean a perfect sphere in terms of geometry, but may have any fluidity when stacked in large numbers.

  A golf ball is obtained by laminating a plurality of rubber layers around a core of a sphere, and has high strength, elasticity, hardness, and durability. Therefore, bullets that hit a sphere of this nature are repelled almost without being crushed or damaged. Alternatively, even if a bullet falls into the sphere, it is ejected out of the ball, so that the entire or part of the bullet hardly remains in the sphere. Therefore, the diffusion of harmful lead to the vicinity of the target can be prevented. Furthermore, the golf ball has a large number of dimples (indentations) on the surface, has fluidity, and does not stick to each other. Since the sphere has such properties, the bullets can easily fall between the spheres, and the bullets can easily slide on the surface.

  The layer thickness (direction of bullet passage) of many golf ball-like spheres is preferably 200 mm or more in the case of shooting training for pistols carried by police officers.

  Further, if a golf ball sphere entrance is provided at the top of the outer cover or the like, it is possible to easily check the inside of the outer cover and replenish or replace the golf ball sphere.

  The backstop can be supported by an appropriate method such as hanging from the top or installing on the gantry. Further, a rubber plate for preventing bullets can be further provided before the backstop.

In the present invention, it is preferable that the granular ballistic member is a used, defective, or new (Class B) golf ball.
Since such a golf ball can be obtained free of charge or at a low price, the manufacturing cost can be reduced.

  In the present invention, the outer covering is a planar member made of a rubber material or a synthetic resin material that spreads on the target side surface (front surface) or the surface facing the front surface (rear surface). And an outer frame member made of a tire surrounding the periphery.

  The tire has a reasonable size that is one size larger than the target size, considering the general target size, sufficient strength and the above-mentioned properties (the hit bullet passes, Maintain). When a waste tire is used as a tire, it can be obtained at a low cost, so that the cost for manufacturing the entire backstop can be reduced.

  The planar member may be arranged so as to be perpendicular to the bullet passing direction or inclined slightly upward.

  In the present invention, if the front surface member and the rear surface member are made of the same structure and material, the front member is turned over when the front member is worn to some extent, and the rear member is turned to the target side. Can be used again for Thereby, the durability of the backstop can be extended.

  In this invention, it is preferable that the outlet which takes out the bullet which stopped in the said backstop and collected on the bottom is provided in the bottom of the said outer covering body.

If a grid having a size smaller than the diameter of the golf ball-like spherical body and larger than the diameter or length of the bullet is provided at the outlet, the golf ball-like sphere is locked to the grid, but the bullet passes through the grid. And fall, making it easier to collect bullets.
If a large amount of bullets remain inside, the bullets fired later may hit the remaining bullets and be crushed, but according to this aspect, the internal bullets can be collected as quickly as possible. .

  As is clear from the above description, according to the present invention, the bullet that has passed through the outer cover hits many golf ball-like spheres many times, and loses the kinetic energy held during that time and stops. The stopped bullets stay in the space between the golf ball-like spheres and gradually fall downward due to their own weight, so that the internal bullets can be collected separately. Further, if a waste tire is used as the outer cover or a used or defective golf ball is used as a golf ball-like sphere, the material cost can be reduced and the waste can be used effectively.

It is a figure explaining the structure of the backstop which concerns on embodiment of this invention, FIG. 1 (A) is a top view, FIG.1 (B) is a front view, FIG.1 (C) is a side view (partial sectional view) ). FIG. 2A is a front sectional view of the lower portion of the backstop, and FIG. 2B is a bottom view of the backstop. It is a figure explaining the shooting training field provided with the back stop of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
A backstop according to an embodiment of the present invention will be described with reference to FIG.
The backstop 1 of the present invention has an outer cover 10 and a large number of golf ball-like spheres 30 as granular stopping members accommodated in the outer cover 10.

  The outer cover 10 is a hollow disk-shaped member having a certain thickness (depth). As the material, it is preferable that the bullet is difficult to reflect to the target side, and the through hole after the bullet has passed is closed, and the strength is maintained even after passing, for example, natural rubber, chloroprene Synthetic rubber, compression rubber, synthetic resin material, etc. can be used. In this example, the outer cover 10 includes an outer frame member 11 and front and rear planar members 13 that cover the front and rear openings of the outer frame member 11.

  As the outer frame member 11, a general automobile waste tire can be used. As an example, the outer diameter of the waste tire is 820 mm, the diameter of the opening 11a (see FIGS. 1B and 1C) is 470 mm, and the width (thickness) is 245 mm. The outer surface of the tire is the same as the waste tire. The opening 11a is the inner periphery itself of the connecting portion (wheel rim) with the tire wheel. The reinforcing material such as a steel cord in the tire is left as it is.

  The planar member 13 includes a front side member 14 that is slightly smaller than the outer diameter of the outer frame member 11, and a back side member 15 that is substantially equal to the diameter of the opening 11 a of the outer frame member 11. Both members 14 and 15 are made of natural rubber, synthetic rubber, or synthetic resin as described above. As an example, the outer diameter of the front side member 14 is 710 mm, the thickness is 15 mm, the outer diameter of the back side member 15 is 470 mm, and the thickness is 15 mm. The back side member 15 is concentrically overlapped with the front side member 14 and bonded by an adhesive or the like. The planar member 13 is attached so that the back side member 15 is fitted into the opening 11 a of the outer frame member 11, and the periphery of the front side member 14 is fixed to the periphery of the opening 11 a of the outer frame member 11 with screws.

  An inspection opening 17 is formed in a part (generally an upper portion) of the outer peripheral surface of the outer frame member 11. The opening 17 has a rectangular shape in a plan view and opens on the outer peripheral surface of the outer frame member 11 and is closed with a flat rubber lid 18 so as to be opened and closed. Further, as shown in FIG. 2, an opening 21 for taking out bullets (an outlet) is opened at the bottom of the outer peripheral surface. The outlet 21 also has a rectangular shape in plan view and is open to the outer peripheral surface of the outer frame member 11, and a lattice 22 is attached from the inside of the outer frame member 11. The mesh of the lattice 22 is smaller than the diameter of a golf ball-like spherical body 30 described later, and larger than the diameter and length of the bullet. Thereby, the golf ball-like sphere 30 is locked to the lattice 22, but the bullet passes through the lattice 22 and falls. As an example, the mesh interval is 30 × 30 mm. The inspection opening 17 and the outlet 21 are preferably formed substantially on the diagonal of the outer frame member 11.

  The golf ball-like sphere 30 is a sphere having strength, elasticity, hardness, surface friction coefficient, economic efficiency, etc. equivalent to or close to that of a golf ball, and a used or defective golf ball can be used. A typical golf ball has an outer diameter of 42 mm and a weight of 45.5 g. Generally, a golf ball is manufactured from a material having high elasticity, high repulsive force, and high strength, and has high durability. Therefore, the bullet can be rebounded, and even if the bullet is sunk, it is ejected outside due to its high elasticity, so the bullet is not easily damaged or deformed, and the whole or part of the bullet does not remain in the ball . Furthermore, since a plurality of dimples (indentations) are formed on the surface, the balls have fluidity and the balls do not stick together. When rubber chips are used as the granular member described in the conventional example, depending on the environment, the rubber chips are fixed to each other and fluidity is deteriorated, and the bullet may be difficult to fall through between the chips. In the case of a golf ball, fluidity is good and it does not stick to each other, so that bullets easily fall through between the balls.

  The plurality of golf ball-like spheres 30 are filled in the outer cover 10 leaving a space S slightly in the upper part (the upper part of the planar member). When filling, it can be filled from the inspection port 17 formed in the outer peripheral surface of the outer frame member 11, for example. When the outer cover 10 having the above dimensions is used, about 1200 golf balls are accommodated.

The stopping action of the backstop 1 will be described.
The backstop 1 is installed such that the outlet 21 provided on the outer peripheral surface of the outer cover 10 is on the bottom. When the bullet hits the planar member 13 of the outer cover 10, it passes through the member 13 and enters the outer cover 11. The bullet through hole of the planar member 13 is almost closed after the bullet has passed due to the elasticity of the member, and the strength of the planar member 13 is maintained even after the bullet has passed.

  The bullet that has passed through the planar member 13 and attenuated to some extent kinetic energy hits the plurality of golf ball-like spheres 30 many times, and loses the kinetic energy held between them to stop. As described above, the golf ball-like sphere 30 repels the impacted bullet due to the highly elastic nature of the golf ball, so that the bullet is less likely to be crushed. Moreover, even if the bullet is indented, it is ejected immediately, so that the entire bullet or fragment does not remain in the ball. Furthermore, the golf ball-like sphere 30 itself is not easily damaged or damaged by the bullet. Since the golf ball sphere 30 is accommodated in the outer cover 10 leaving a space, if the golf ball sphere 30 is mixed by shaking the outer cover 10, the position of the golf ball sphere 30 is changed. The same golf ball-like sphere 30 does not stay in a position where there is no bias and it is easy to land. Thereby, the whole life of the golf ball-like sphere 30 can be extended.

  The bullets stopped in the outer covering body 10 stay in the space between the plurality of golf ball-like spheres 30 and gradually fall downward due to their own weight. At this time, sticking hardly occurs between the golf ball-like spheres 30 and the surface of the sphere 30 is relatively smooth, so that the bullet falls without receiving a great resistance. Further, since the golf ball-like sphere 30 moves relatively freely as described above, it is possible to prompt the bullet to fall by vibrating the backstop 1. The bullets are recovered after dropping onto the floor surface through the grid 22 of the outlet 21 at the bottom of the outer cover 10. If bullets remain in a large amount or partially concentrated inside, the bullets fired later may hit and hit the remaining bullets. It can be dropped and collected as quickly as possible, and the above-mentioned problems can be improved.

  Further, when the planar member 13 facing the target side is damaged, the planar member 13 on the opposite side can be directed to the target by turning the front and back of the backstop 1 upside down, so that the durability period can be extended.

With reference to FIG. 3, an example of the state which installed the backstop in the real bullet shooting training field is demonstrated.
When the backstop 1 is installed in the actual shooting training field, it is preferable to arrange rubber plates 40 and 50 for preventing bullets before or after the backstop 1. The front and rear rubber plates 40 and 50 have dimensions that are slightly larger than the outer diameter of the backstop 1.

  The backstop 1 is installed suspended from above along the wall surface W behind the target T. In this example, as shown in FIG. 1, two suspension wires 25 are passed through the outer peripheral surface of the outer frame body 11, and a locking member 26 is attached to the lower end of the wire 25 that has passed through the outer peripheral surface. Is engaged with the outer cover 10. The upper end of each wire 25 is fixed to a bracket B protruding forward from the wall surface W. In this method, the planar member 13 is arranged perpendicular to the bullet passing direction, but may be arranged slightly inclined upward.

  The front and rear rubber plates 40, 50 can also be suspended from the bracket B by wires.

DESCRIPTION OF SYMBOLS 1 Backstop 10 Outer member 11 Outer frame member 13 Planar member 14 Front side member 15 Back side member 17 Opening 18 Lid 21 Outlet 22 Lattice 25 Wire 26 Locking member 30 Golf ball-like spheres 40, 50 Rubber plate

Claims (5)

A backstop that is positioned behind the target of the live-fire shooting training and receives a bullet that has passed through the target,
An outer casing for housing the granular stopping member;
A large number of golf ball-like spheres as the granular stopping members housed in the outer cover,
A backstop characterized by comprising:   The backstop according to claim 1, wherein the granular stopping member is a used, defective, or new (Class B) golf ball. The outer covering is
A planar member made of a rubber material or a synthetic resin material that spreads on the target-side surface (front surface) or the surface facing the front surface (rear surface);
An outer frame member comprising a tire surrounding the planar member;
The backstop according to claim 1, comprising:   The backtop according to claim 3, wherein the front surface member and the rear surface member are made of the same structure and material.   The backstop according to any one of claims 1 to 4, wherein an extraction port is provided at a bottom of the outer covering body to take out a bullet that is stopped in the backstop and collected at the bottom.

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