DE9017946U1 - Bullet trap system - Google Patents

Description

DIPL.-ING. HORST ROSE DIPL.-ING. PETEFi-KOSTEL - OIPL.-ING. PETER SOBISCH

PATENT ATTORNEYS AUTHORIZED BY THE EUROPEAN PATENT OFFICE - EUROPEAN PATENT ATTORNEYS

Patent Attorneys Rose, Kosel & Sobisch PO Box 129, D-3353 Bad Gandersheim 1

Odastrasse 4a

PO Box 129

D-3353 Bad Gandersheim 1 Germany

YourRef.

Our reference/Ourref. 4095/4

Telephone (05382)4038 Telex957422siedpd Fax (05382)4030 Telegram address: Siedpatent Badgandersheim

Date

bke Bildtechnik Owner Ernst Stechemesser

DESCRIPTION

Bullet trap system

The subject of the invention is a bullet trap system with catching elements made of plastic or elastic material.

Bullet-stopping devices are known that consist of narrow, vertically suspended rubber slats, which are suspended next to each other in one or more layers, inclined to the direction of fire, in sufficient density.

Furthermore, bullet traps are known which consist of one or more layers of blocks made of rubber granulate, thermoplastics or elastomers stacked on top of each other.

In addition to numerous advantages, such as low noise levels and largely gentle deceleration of the projectiles, these systems still have significant shortcomings and disadvantages. In both versions mentioned

-2-PS/La

Bank account: NORD/LB, NL Bad Gandersheim (bank code 250 500 00), account no. 22 118 97C ■ ?cstg:rckonto: Postgiroamt Hannover (bank code 250 100 30), account no. 667 15-307

With different types of oiling, the material used in the main firing areas is destroyed to a much greater extent than in the surrounding areas. In these areas, large accumulations of metallic projectile material are formed by projectiles and projectile remnants that get stuck in the bullet trap material. When subsequent projectiles hit, they are no longer gently slowed down in the desired way, but - as with steel lamella bullet traps, for example - are partially or completely disintegrated. This results in harmful heavy metal emissions.

The accumulation of material in the known bullet traps with trap elements made of plastic or elastic material also leads to the increase in volume causing the structures to "swell up", which destroys their basic structures, reduces the trapping effect and makes subsequent service work considerably more difficult due to the material becoming wedged.

The invention is based on the task of developing a bullet trap device with trap elements made of plastic or elastic material, in which the mentioned disadvantages of strong material wear and large metal accumulations in the main firing areas are avoided and which ensures problem-free maintenance even under heavy firing.

In Fig. 1, a bullet trap device according to the invention is shown in the basic version using an example.

The bullet trap consists of several tracks 1, preferably suspended vertically one behind the other, made of

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Ol plastic or elastic material, the thickness of which is approx. 4-8 mm. The material thickness is chosen so that it is less than the length of the projectiles mainly used on the system. This ensures that the projectiles 2 always protrude with part of their length from the plastic material of the tracks 1. This is important for the later removal of the projectiles from the plastic material.

The plastic sheets, mats or panels 1 suspended in several layers one behind the other have a distance d between them that is at least a few millimeters greater than the average projectile length g. This ensures that projectiles 2 that have lost so much kinetic energy after passing through the previous layer that they can no longer penetrate the next layer fall to the ground and cannot become jammed between the individual sheets 1.

When using a rubber-elastic plastic material for the tracks 1 and with a material thickness of 4-8 mm, when firing with 9 mm paramunition, 5-6 tracks 1 arranged one behind the other are usually required in order to completely slow down the projectiles 2. For safety reasons, another 2 or more tracks 1 can be added to ensure that all projectiles are safely intercepted.

In addition, the entire bullet trap system can be secured on its rear side by a steel plate 3 approximately 5 mm thick.

30The individual sheets, panels or mats 1 made of plastic or elastic material are attached to ceiling supports.

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Ol rungen 4 possibly in connection with a supporting structure 5 erected on the floor.

In the basic design of a bullet trap system according to the invention shown in Fig. 1 as an example, the tracks, mats or plates 1 serving as trapping elements are arranged at right angles to the main firing direction 6. With this design, the projectiles 2 are intended to deliberately penetrate the individual tracks 1 vertically and in doing so release a large part of their kinetic energy until this is completely destroyed and the projectiles 2 either get stuck in the tracks 1 or fall to the ground in the gaps 7.

The design of bullet traps according to the invention can be varied in many ways. An important variant is shown in Fig. 2 using an example. The tracks 1 made of plastic or elastic material with a thickness of approx. 4-8 mm, which serve as trapping elements, are designed as endless tracks 8 in this design and can be moved vertically using pulley systems 9. The individual endless tracks 8 with the associated vertical pulley systems 9 can also be suspended from horizontal displacement devices 10. This suspension, which allows the tracks to be moved both vertically and horizontally, makes it possible to move the tracks 8 horizontally and vertically in such a way that the shot load is distributed largely evenly over the entire track surface.

30On the collecting tracks 8, outside the firing area, scrapers 11 are attached, with which the projectiles 2 protruding from the tracks 8 are removed

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Oil. These then fall directly downwards out of the bullet trap system or are guided outwards via guide elements and collected in collecting containers 12.

In a further development of the bullet trap system according to the invention shown in Fig. 2, the vertical and horizontal displacement of the trap tracks 8 can be carried out by motor drives. In conjunction with a suitable control device, a fully automatic bullet trap drive can be realized in this way, whereby the respective vertical and horizontal displacements of the tracks 8 can be carried out depending on the number and hit location of the shots fired.

A further variant of bullet trap devices according to the invention are those systems in which the tracks 8 are arranged vertically or horizontally inclined against the main firing direction 6 over the entire extent of the bullet trap or in partial areas. An example of such a design is shown in plan view in Fig. 3. A variation of the basic idea of the invention can also be a combination of layers that are arranged one behind the other at any desired angle and at any desired inclination to the main firing direction 6. The track elements inclined against the firing direction can be designed as vertically or horizontally aligned slats 13 with a corresponding inclination. An example of such a design is shown in Fig. 4. The first three layers are arranged at a right angle to the main firing direction 6. The following

30 layers are arranged as vertically suspended slats with track planes inclined against the direction of fire.

Another variant of the bullet trap according to the invention

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Oil position results from the arrangement of different

thick tracks, plates or disks 1 or 8 one after the other. In this case, tracks 1 or 8, which are hit first by projectiles 2 - in relation to the movement device - are expediently made thicker than the tracks behind them. For example, the 1st track has a material thickness of approx. 12 mm, the 2nd track a thickness of approx. 8 mm, the 3rd a thickness of approx. 6 mm and the following tracks a material thickness of approx. 4 mm. This gradation of thickness takes into account the fact that projectiles 2 initially hit the 1st track with high energy, lose kinetic energy when penetrating it and thus arrive in the next track with less kinetic energy. The thicknesses of the individual consecutive tracks are reduced in accordance with the reduced average kinetic energy. This prevents the projectiles from getting stuck inside a track that is too thick, despite braking as quickly as possible, and thus cannot be removed using simple means. This would lead to undesirable metal accumulations forming inside tracks 1 or 8.

All the design variants described above for bullet traps according to the invention and shown in the figures can also be combined with one another. This means that the design of the bullet traps according to the invention can be optimally adapted to the specific requirements in each case.

Bullet traps according to the invention are characterized by a soft, noiseless bullet deceleration. Due to the large number of tracks arranged one behind the other, which preferably have a thickness of less than the

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Ol have medium projectile length, the majority of the projectiles fired do not remain in the bullet trap material but fall to the ground in the spaces between the individual tracks.

By moving the tracks vertically and horizontally, the impact load can be optimally distributed over the entire bullet trap area. Since the track thicknesses are each smaller than the bullet lengths, any bullets remaining in the material that protrude from the tracks can be removed by scrapers. The bullet trap devices according to the invention achieve a long service life and require only minimal maintenance. With suitable controls, the operation of the systems can be automatically regulated depending on the impact load and the hit locations.

Claims (11)

EXPECTATIONS 05 Bullet trap device, characterized in that several tracks, mats or plates (1) made of plastic or elastic material, usually suspended vertically one behind the other, the thickness of which is preferably but not exclusively approximately 4-15 mm, are used, that the distance between the individual sheets, mats or plates (1) is such that it is at least a few mm larger than the average length g of the projectiles used, that thermoplastic elastomers are preferably used as the material for the sheets, mats or plates (1), that the sheets, mats or plates (1) are attached to points above them, outside the firing range. -2-PS/La Bank account: NORD/LB, NL Bad Gandersheim (bank code 250 500 OC), (Co.-No. 22 118 97C ■ !'ostgTo account: Postgiroamt Hannover (bank code 250 100 30), account no. 667 15-307 -2-Oil rich brackets are attached. 2. Bullet trap device according to claim 1, characterized in that the bullet trap system is equipped with a steel plate (3) on its rear side. 3. Bullet trap device according to claims 1-2, characterized in that the holders for the individual tracks, mats or plates (1) mounted at the top are suspended from support structures (5) which in turn are attached to the floor of the room using suitable structures. 4. Bullet trap device according to claims 1-3, characterized in that the tracks, mats or plates (1) are arranged at right angles to the main firing direction. 5. Bullet trap device according to claims 1-3, characterized in that the tracks, mats or plates (1) are arranged at an angle of inclination of less than 90° in the horizontal and/or vertical direction to the main firing direction. 6. Bullet trap device according to claims 1-5, characterized in that that the webs, mats or plates (1) are designed as endless webs that can be moved manually or by motor in the vertical direction via deflection roller systems (9), that scrapers (11) are attached to the collecting tracks (8) outside the firing area. -3- -3- Oil 7. Bullet trap device according to claims 1-6, characterized in that the tracks, mats or plates (1) are suspended from horizontal displacement devices (10) with manual or motor drive. 8. Bullet trap device according to claims 1-7, characterized in that collecting containers (12) are arranged below the tracks, mats or plates (1). 9. Bullet trap device according to claims 1-8, characterized in that the tracks, mats or plates (1) are arranged one behind the other and next to one another at right angles or at an angle in any desired manner with regard to their inclination to the main firing direction. 10. Bullet trap device according to claims 1-9, characterized in that the webs, mats or plates (1) are made in different thicknesses. 11. Bullet trap device according to claims 1 - 10, characterized in that the individual features according to claims 1 - 10 are combined with one another in any desired manner.