Patent Application
20220056652
The present disclosure relates to lightweight barriers for protection from terrorist truck ramming attacks.
Recent years have seen an increase in terrorist attacks in the West. This surge in terrorist acts has also been marked by a diversification in the means used in Europe, with the emergence in particular of the use of heavy goods vehicles as a weapon of terror.
There are heavy barriers that can reduce the risk of this type of attack, such as concrete barriers or metal posts securely anchored to the ground. However, this type of barrier requires either permanent installation or heavy logistics implying the use of a lifting device. This limitation is particularly acute with regard to securing temporary events, festivals, commercial fairs, concerts, etc. Furthermore, these temporary events appear to have today become favorite targets for terrorists.
One solution to this problem is provided for example by document US 2012/0177439 which proposes a lightweight barrier that can be set up, positioned and dismantled by just a few people having little in the way of tools and no lifting device. However, although these barriers are effective against lightweight vehicles, experience shows that they are not adequate to stop heavy vehicles such as those used recently by terrorists.
In prior art documents, the distance between adjacent modular elements is fixed by horizontal cross bars connecting each adjacent element. Such a system has several drawbacks. For example, it cannot be adapted to the way width and have a predetermined truck resistance. In many cases, it also has poor resistance against lateral attack such as attack at 45° (real lateral attack are usually hindered by street width and building boarding the street or place).
The present disclosure aims to propose a device for protection from attacks using heavy goods vehicles, which device should be lightweight and easy to use by law enforcement having little in the way of tools.
It should also be easily adaptable to practical situation both in terms of truck resistance and in terms of lateral dimensions.
The present disclosure relates to an anti-ramming truck barrier element comprising:
an essentially horizontal arresting bar;
an essentially vertical pivot bar comprising at least three fasteners distributed along the length of each side of said pivot bar (i.e. three fasteners are on the right side and three fasteners are on the left side of the pivot bar), the arresting bar being rigidly connected to the pivot bar; and
connecting bars pivotably connected to the side of the pivot bar, said connecting bars being adapted to be cross-connected at different crossing angles to adjacent pivot bars by means of the at least three fasteners distributed along the length of each side of said pivot bar.
According to preferred embodiments of the present disclosure, the anti-ramming truck barrier element comprises one or an appropriate combination of several of the following features:
A second aspect of the present disclosure relates to an anti-ramming truck barrier comprising several anti-ramming truck device elements according to the first aspect, adjacent elements being attached together by the corresponding connecting bars connected to the said fasteners.
Additional preferred details of the general setup of such barriers can be found in document EP3378992, which is hereby incorporated by reference.
As shown in
Essentially horizontal is to be understood as meaning that these bars are intended to be laid on the ground, one of the two ends being laid on the ground and the other end being either laid on the ground or slightly raised.
The barrier elements 1 of the present disclosure are adapted to be assembled together with connecting bars 9,10,14,15. Those connecting bars are adapted to be cross connected at different angles between adjacent barrier elements, so that the distance between elements can be varied.
One advantage of such distance variability is that the mounted barrier can be adapted to different threat levels (i.e. truck weight and speed), the barrier being stronger when the distance is minimum and weaker when the distance is maximum.
A further advantage of the present disclosure is that by varying the distance between adjacent elements, the strength of the barrier can be fine-tuned for example by alternating wide and narrow distance between elements.
Another advantage is that the mounted barrier width can be adapted to the way width easily. As a further advantage, the strength of the barrier can be varied along the width of the barrier: for example, three elements in the middle of the barrier are assembled at minimum distance, and the elements on the side are assembled at maximum distance so as to cover the entire available width.
The most important connecting bars are those fastening the pivot bars 12, as they also help stabilizing the vertical position of each element in a barrier. These are the connecting bars 9,10 affixed to at least one lateral side of the pivot bar of each element as seen in
In order to vary the angle between cross-connected connecting bars, each side of the pivot bars comprises a plurality (at least 3) of fasteners 2,3,4,18,19,20 wherein the extremity of the connecting bars 9,10 can be secured.
As shown in the
In contrast with some prior art that seeks to produce a vertical barrier that is held in that position by the weight of a vehicle on a base of the barrier, or that seeks to lift up the vehicle by means of a rotational movement of the barrier, preferred embodiments of the barrier elements of the present disclosure aims to use arresting bars 11 as stakes or spearheads that are on the one hand lodged in the ground by a spike 13 that penetrates the surface of the ground, and on the other hand lodged in the underside of the body of the vehicle by the impact of the vehicle with the elements of the device of the present disclosure.
Indeed, in the case of a heavy goods vehicle, it is ridiculous to suggest that the hinge of the devices of the prior art can have sufficient mechanical strength to stop a truck travelling at full speed. By contrast, a stake lodged in the underside of the body, rather than lifting up the truck, allows the greatest possible amount of kinetic energy to be absorbed, and the truck to be stopped more efficiently. It is then clear that the more horizontal the stake (opposite the direction of movement) during the arresting phase, the more effective the system.
In order to arrive at this result, the device of the present disclosure seeks to facilitate pivoting of each element of the barrier. To that end, rather than using a vertical barrier, the pivot bars 12 are fixed to the arresting bars 11 at an angle of at least 100°, that is to say at least 10° greater than the angle of the prior art barriers. This angle is preferably between 100 and 135°. This inclination has two consequences. First, this inclination moves the center of gravity of the assembly backward, thus facilitating pivoting of the device; second, this angle makes it possible to increase the torque of rotation applied by the front of the truck on the system.
Advantageously, anchoring means comprising a spike 13 that is able to penetrate the surface of the ground when the device pivots as a consequence of a truck hitting the barrier are arranged at the end of or in line with the arresting bars in order to improve the stake effect thereof.
Advantageously, the arresting bars 11, when the device is set up on a flat horizontal surface, are slightly inclined, the pivot bars 12 forming an angle of at least 100° with respect to the horizontal, this inclination being preferably obtained by means of supports 24,25 located slightly forward of the center of gravity of the arresting bar 11/pivot bar 12 assembly or assemblies so as to facilitate pivoting of the assemblies.
The said supports can be in the form of small wheels 25 facilitating the displacement of the barrier. In that case, the position of those wheels 25 are critical and should be very close to the vertical position of the center of gravity of the barrier elements, so that the rotation is easily obtained by the inertial behavior of the barrier when hit by a fast vehicle.
Preferably, the said wheels 25 can be retracted and leave the arresting bar resting on a spike 24 protruding from the bottom side of the arresting bar 11. In that case, the position of the spike 24 is less critical, as the friction forces between the spike and the ground would help the rotation movement.
In addition to those aspects of the device making it effective in terms of stopping ability, the device of the present disclosure must also be easy to set up and dismantle by a limited number of persons. To that end, the device can preferably be dismantled, the arresting bars 11 being removably fitted into connectors 6 into which the pivot bars 12 are removably fitted, the connectors maintaining a fixed angle of greater than 100° between the arresting bars 11 and the pivot bars 12.
| Number | Date | Country | Kind |
|---|---|---|---|
| 19154548.2 | Jan 2019 | EP | regional |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2020/052108 | 1/29/2020 | WO | 00 |
