KR20000038452A - Bulletproof grille of special vehicle - Google Patents

Abstract

PURPOSE: A bulletproof grille of a special vehicle is provided to enhance impact absorbing force from a bullet or a broken piece and increase productivity with a simple producing process. CONSTITUTION: A bullet or a broken piece collides with a buffer layer exposed outside. The colliding bullet or broken piece is shot through the buffer layer and collides with an inner beam. Then kinetic energy is decreased. When the bullet or piece springs up inside the buffer layer, the buffer layer swells out to fully absorb remaining kinetic energy of the bullet or piece. Also, the beam is bent in a length direction to be an angle bar which forms a front slant and a rear slant.

Description

Bulletproof Grill of Special Vehicles

The present invention relates to a ballistic grill, and more particularly to a ballistic grill installed in the intake and exhaust ports of a special vehicle such as a combat vehicle.

The combat vehicle is encapsulated in the engine room to prevent damage to the cooling system and the engine, such as bullets or fragments of explosives.

The flow of air required for combustion and cooling of the engine mounted in the encapsulated engine room is made through the inlet and the exhaust port connected to the capsule of the engine room, as shown in FIG. 1 in the inlet and the exhaust port of the combat vehicle 100. Bulletproof grills are installed to prevent bullets and debris from entering the engine compartment and damaging the engine and cooling system. These ballistic grills must have sufficient structural strength to block bullets or debris and to maximize air intake and emissions with a minimum footprint.

Figure 2 shows an example of a conventional bulletproof grill.

As shown, a plurality of protective beams 11 and a support 12 are spaced at predetermined intervals. The protective beam 11 includes a core 11a and an outer shell 11b having a buffer property surrounding the core.

The bulletproof grill 10 has a problem in that the core 11a is completely enclosed by the shell 11b so that it is difficult to completely coat the shell on the core and thus difficult to manufacture.

And another example of a bulletproof grill is disclosed in the Federal Republic of Germany Patent No. OS3703716. This conventional ballistic grill includes a plurality of profile moldings made of structural steel, and has a structure in which the profile is installed in whole or in part at the inner end of the profile. Since the bulletproof grille is made of only steel profile, the shock absorbing ability is weak, and when the collision between the profile and the bullet has a bullet point or the profile is broken, there is a problem inflow into the engine room.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a bulletproof grill of a special vehicle that can improve impact absorption of bullets or fragments, and that the production can be simplified to improve productivity.

Another object of the present invention is to provide a bulletproof grill for a special vehicle that can be reduced in weight.

1 is a perspective view showing a special vehicle,

Figure 2 is a perspective view of a conventional bulletproof grill,

3 is a partially cutaway perspective view of the bulletproof grill according to the present invention;

4 and 5 is a partially cutaway perspective view showing another embodiment of the bulletproof grill according to the invention,

6a to 6c is a view showing the edge of the beam and the buffer of the present invention,

<Description of the code | symbol about the principal part of drawing>

21: frame 22 (of the bulletproof grille); beam

24; Buffer layer 100; Combat vehicle

In order to achieve the above object, the bulletproof grill of the special vehicle of the present invention has a plurality of beams spaced at a predetermined interval to form a curved passage or an inclined passage, and is installed on one surface of each beam to absorb impact force in the event of collision of bullet or debris. It characterized by including a buffer layer.

In the present invention, the buffer layer is attached to the beam by a resin, and the side to which the beam and the buffer layer are bonded is formed in a direction parallel to the horizontal axis so that the beam is not exposed to the front surface. According to another aspect of the invention the beam is made of a metal alloy and the buffer layer may be made of glass fiber, carbon, aramid, polyimide and the like.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

One embodiment of a ballistic grill according to the invention is shown in FIGS. 3 and 6.

As shown, a plurality of beams are formed in a grid-like frame 21 and both ends thereof are fixed to the frame 2 and spaced apart from each other by a predetermined interval to form an inclined or curved passage for intake or exhaust of air. 22). The buffer layer 24 is formed on one surface of the beam 22, that is, the layer exposed to the outside.

The beam may be made of an angle bar having a front inclined portion 23a and a rear inclined portion 23b inclined at a predetermined angle in a longitudinal direction as shown in FIGS. 3 and 5. The length of the front slope 23a and the rear slope 23b can be arbitrarily adjusted in consideration of air resistance and bulletproof bullets. For example, it is preferable to form the length of the rear inclined portion 23b longer than the length of the front inclined portion 23a. And the beam may be made of a plate bar as shown in FIG. When the beam 23 is made of a plate bar, it is preferable to incline a predetermined angle in the same direction and overlap each other so that a passage formed therebetween is inclined at a predetermined angle.

The beam has a longitudinal edge side 22a of the side exposed to the outside parallel to the horizontal axis, the side of the longitudinal side of the side exposed to the inside is formed parallel to the vertical direction or inclined at a predetermined angle. The beam 22 constructed as described above is made of steel, metal alloy, light metal, or the like.

The buffer layer 24 formed on one side of the beam 22 may be made of aramid, glass fiber, polyamide, polyester, polyethylene, or the like, and is bonded to one side of the metal by an adhesive such as resin. In addition, the buffer layer 24 is preferably formed to be wider than the width of the beam so that the beam is not exposed to the outside, the longitudinal side of the buffer layer 24 as shown in Figure 6a to 6c and It is formed side by side horizontally or inclined at a predetermined angle with respect to the horizontal side of the beam.

Looking at the action of the bulletproof grill configured as described above, when bullets or debris collide with the bulletproof grill in a state in which the bulletproof grill 20 is installed in a special vehicle such as a combat vehicle, the bullet or debris is exposed to the outside buffer layer It hits 23. The impacted bullet or debris penetrates the roundworm layer and collides with the inner beam, thereby reducing the kinetic energy in two stages. When the impacted bullet or debris collides with the beam and bounces in the buffer layer, the buffer layer 24 bulges outward and the adhesive layer of the bounced portion swells off partially to completely absorb the residual kinetic energy of the bullet.

When the bullet or the debris collides with the beam and is split into a plurality of pieces, as described above, the bullet or the debris is embedded in the buffer layer 24 or the buffer layer 24 swells to absorb shocks.

3, when the beam is bent in the longitudinal direction to form an angle bar, and the length of the rear inclined portion 23b is longer than the length of the front inclined portion 23a, the beam of the front inclined portion 23a is formed. The bullet or debris penetrating the 22 and the buffer layer 24 is protruded by the beam 22 by the rear inclination portion 23b, and the kinetic energy is caused by the buffer layer 24 and the beam 22 positioned below. Is absorbed. And the bullet penetrating the beam of the rear inclined portion 23b is absorbed by the buffer layer 24 is embedded in the buffer layer.

Bulletproof grille of the special vehicle that is operated as described above is effectively prevented from entering the bullet or debris inside. In addition, since the complete layer is formed only on one surface of the beam exposed to the outside, it is possible to reduce the weight.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible.

Therefore, the true scope of protection of the present invention should be defined by the appended claims.

Claims (6)

Bulletproof of a special vehicle, characterized in that it comprises a plurality of beams spaced apart by a predetermined interval to form a curved passage or inclined passage, and a buffer layer provided on one surface of each beam to absorb impact force in the event of a bullet or debris collision Grill. The ballistic grill of a special vehicle according to claim 1, further comprising an adhesive layer for joining the beam and the buffer layer. The ballistic grill of a special vehicle according to claim 1, wherein the longitudinal side of the beam to which the beam and the buffer layer are bonded is formed to be parallel to the horizontal axis so as not to be exposed to the front surface. The ballistic grill of claim 1, wherein the beam is made of a metal alloy and the buffer layer is made of one of glass fiber, carbon, aramid, and polyimide. The ballistic grill of claim 1, wherein the beam is bent at a predetermined angle in the longitudinal direction of the beam and has a front slope portion and a rear slope portion. The bulletproof grill of claim 5, wherein a length of the rear inclined portion is longer than that of the front inclined portion.