A screening device of this kind is known. It comprises a case or cone of impregnated fibrous material. This known screening device offers a certain degree of protection against explosives which, for whatever reason, cannot be dismantled.

Despite the effective action of the known screening device, its practical introduction has nevertheless been found to present problems. It is necessary for a considerable number of screening devices of this kind to be kept in readiness at the location to be protected. In view of the fact that the screening devices take up a relatively large amount of space, owing to their tubular shape, a large storage area has to be reserved for them. These factors make protection of this kind so expensive and impractical that it has been difficult to introduce.

The object of the invention is therefore to provide a screening device which causes fewer problems with regard to keeping it in a state of readiness. This object is achieved by the fact that the case-like body has an inner shell for counteracting fragmentation, and an outer shell for absorbing the energy released in the event of an explosion, which inner shell and outer shell fit separately inside one another.

Due to the fact that the inner shell and the outer shell are not adhesively bonded to one another and therefore remain separate from one another, the case is not rigid, but rather the separate shells can be handled and stored more easily. In this case, these shells may be so flexible that they take up considerably less room during storage.

On the other hand, there is no impairment to the rapid deployability of the screening device. The inner shell merely has to be pushed into the outer shell, after which the screening device is ready for use.

The inner and outer shells may be designed in various ways. According to a preferred embodiment, the inner shell comprises at least one plastic plate, which is held in a curved shape by the outer shell. The advantage of an embodiment of this kind is that in particular plates of this nature take up scarcely any room during storage.

Nevertheless, they can quickly produce a curved inner shell which can be pressed under

its own preloading against the outer shell.

Depending on the level of threat from the explosive in question, more or fewer plastic plates of this kind can be placed inside one another within the outer shell.

The material of the plates may, for example, be acrylate or polycarbonate.

Plates made from a material of this nature are suitable for making the fragments released during an explosion harmless by flattening or filling up sharp points on the fragments or rounding off the fragment itself, in such a manner that the surface area of the fragment in the direction of the outer shell is increased and the cutting action of the fragments is reduced.

Preferably, the outer shell comprises at least one flexible sleeve made from fibrous material. The bundle of fibres used in this case consists of fibres with a high energy-absorbing capacity, such as aramid, polyethylene, glass or nylon. The fibrous material is not provided with a matrix, which means that the sleeve can easily be folded flat.

For this reason, the sleeves also take up scarcely any room during storage. In order to employ the plates, they can be moved into an open position, after which they are held firmly in the open position under the preloading of the plates.

The number of sleeves accommodated inside one another can also be adapted to the threat posed by the explosive. In order to protect the bundle of fibres against external influences, the unit can be wrapped in a plastic sheet. Preferably, an aluminium foil can be arranged on the inside of the sleeve, in order to increase the stability of a sleeve.

In addition to varying the number of plates and sleeves, consideration may also be given to varying the diameter and height of the shells.

Finally, it is possible to conceive of a variant in which the case-like body can be folded up in its entirety.

The invention will be explained in more detail below with reference to an exemplary embodiment illustrated in the figures, in which: Figure 1 shows the screening device according to the invention in the deployed state.

Figure 2 shows the separate components for screening devices of this kind.

The screening device 1 depicted in Figure 1 is placed around a landmine 2, on the ground 3. This screening device comprises an outer shell 4 and an inner shell 5, which are held in a close-fitting manner one inside the other. The outer shell 4 comprises a number of sleeves 6 made from wound fibrous material, for example from

aramid fibres, polyethylene fibres, etc. A layer of aluminium foil 8 is accommodated on the inside of the sleeves 6. Together with the sleeves 6, this layer of aluminium foil 8 is packaged inside a packaging sheet 9.

The assembly comprising sleeves 6, aluminium foil 8 and packaging sheet 9 is flexible and can be folded flat, as illustrated in Figure 2. On the other hand, the aluminium foil 8 in particular provides the outer shell 4 with a sufficient rigidity to enable it to be placed in the open state without falling over.

The inner shell 5 comprises a number of curved plates 10, which in the starting position have a flat form, as also illustrated in Figure 2. These plates may consist of a material which has good resistance to fragmentation, such as polycarbonate, acrylate and the like.

However, plates 10 are sufficiently flexible to be able to be moved into a curved shape and then placed within the erected outer shell 1. In this position, one or more curved plates of this kind form the inner shell 5, as illustrated in Figure 1.