Anti-ram vehicle barrier for 7.2t or 25t vehicles

Abstract

The invention relates to an anti-ram vehicle barrier (1) comprising welded steel teeth (20) that are spaced apart from one another and connected to one another, characterised in that the teeth (20) are connected by at least two shafts (30) mounted in through-holes (23) in the teeth (20), the shafts (30) comprising at least one steel crossmember (32) having an intermediate portion bordered by two flanges (34), two ends fitted with assembly members and two end plates (31) that have a span bordered by a flange (34), one end being provided with assembly members. The assembly members are designed to connect two crossmembers (32) or a crossmember (32) and a plate (31) to one another so that each tooth (20) is laterally constrained by two flanges (34).

Description

Description Title of the invention: anti-ram vehicle barrier device for vehicles weighing 7.2t or even 25t Technical field

[0001] The invention relates to the technical field of so-called anti-ram vehicle safety barriers.

[0002] The invention finds an advantageous application in securing public events by preventing the movement of vehicles. This device also meets the needs of neutralizing a traffic lane or temporarily securing a construction site, for example. Prior art

[0003] Known from the prior art is patent FR3071856 in the name of the Applicant, which describes an anti-ram vehicle barrier device, comprising mechanically welded steel or concrete posts, spaced apart from each other, and connected to each other by round steel crosspieces, equipped with assembly members.

[0004] The device includes in particular flanges guiding the studs laterally, while the crosspieces guide the studs in rotation.

[0005] Each block is therefore perfectly immobilized vertically and laterally but retains the possibility of rotating around the crosspieces.

[0006] In this way, each stud is configured to pivot upwards when struck by a vehicle, so as to lift the front of the stud so that it collides with the vehicle, causing significant damage and stopping its course.

[0007] The set of bollards and crosspieces forms a barrier of variable length depending on the number of bollards.

[0008] For example, in the device described in document FR3071856, the blocks have a height of 0.7 m, a length of 0.9 m, a thickness of 120 mm, for a weight of 45 kg for the steel block and 70 kg for the concrete block. The flanges and the sheets of the plots are 10 mm thick and the crosspieces are 80 mm in diameter and 3 mm thick.

[0009] This solution is entirely satisfactory in that it provides a deterrent and effective device, easy to install, inexpensive, non-removable without special tools, and maintenance-free, in particular to stop the movement, according to the IWA 14-1: 2013 standard, of a vehicle whose weight is less than or equal to 3.5 tonnes.

[0010] However, this solution can be improved, particularly to stop the movement of a vehicle weighing 7.2 tonnes or even 25 tonnes. Statement of the invention

[0011] One of the aims of the invention is therefore to improve the device of the prior art to provide an anti-ram vehicle barrier device capable of stopping the movement, according to the IWA 14-1: 2013 standard or according to the PAS 68:2013 standard, of a vehicle whose weight is 7.2t, 7.5t, or even 25t.

[0012] Another objective of the invention is to provide a deterrent and effective device, easy to install, inexpensive, non-removable without special tools, and which does not require maintenance.

[0013] To this end, an anti-ram vehicle barrier device was developed, comprising mechanically welded steel posts with a base and a post, configured to tilt in the event of a vehicle impact, spaced apart from each other and connected to each other.

[0014] According to the invention, the pads are connected by at least two axes mounted in through holes of the pads, the axes comprising: - at least one steel crosspiece having: - an intermediate portion bordered by two flanges, - two ends equipped with assembly members; - two end plates presenting: - a range bordered by a flange; - one end equipped with assembly members; the assembly members being designed to connect two crosspieces or one crosspiece and a plate, so that each stud is laterally constrained by two flanges.

[0015] In this way, the tipping of a block struck by a vehicle causes the tipping of the entire device. The energy required for this tipping is greater than in the case of tipping a single block, so the device allows for better dissipation of the vehicle's kinetic energy.

[0016] In addition, it is possible to design axles of limited dimensions because the constraints are distributed over several axles instead of just one: the axles are less bulky and less heavy to handle than a single axle of sufficient dimensions to absorb the mechanical constraints generated when lifting a 7.2t or 25t vehicle.

[0017] The length of the axles can be adapted according to the desired length of the device. It is possible to add crosspieces and blocks to extend the device.

[0018] In a particular embodiment, each pad comprises rings configured to conceal the assembly members. A ring is a spacer connecting two side sheets of a pad, at a through hole. Concealing the assembly parts prevents attempts at vandalism or unauthorized dismantling of the device installed on a road.

[0019] Preferably, the assembly members are in the form of a bayonet comprising: - a transverse rod fixed to the end called the “male end” of a crosspiece or a plate, and - a through groove provided at the so-called "female end" of a crosspiece or a plate, so that when the male end is assembled with the adjacent female end, the rod is housed in the helix-shaped or bayonet-shaped cutout, and the rotation of the male end relative to the female end ensures that the adjacent flanges are brought together, and laterally constrains the stud between said flanges. In this way, the assembly of the elements of the axis is simple, and the assembly members are resistant to wear or shocks which may occur during handling or assembly of the axles. The elements can be pre-assembled by hand, without tools. There is no risk of seizure.

[0020] Preferably, it is a double bayonet, that is to say that the assembly members have two axes and two grooves, diametrically opposed.

[0021] In a preferred embodiment, in order to protect the bayonet shank, the female end has an outer diameter smaller than an inner diameter of the male end, so that the male end caps the female end when assembling the bayonet. The shank does not protrude, and it is concealed by the tube of the male end.

[0022] Advantageously, each crossmember comprises a sleeve and a tube connected by assembly members. The manufacture of the crossmembers is simplified. Preferably, the sleeve has two female ends and the tube has two male ends (or vice versa). Thus, the assembly of the sleeve and the tube makes it possible to obtain the desired change in diameter between the male end and the female end.

[0023] In order to provide improved resistance to impacts from heavy-duty vehicles, the cross-section of the sleeve is greater than the cross-section of the tube. The areas of weakness of the device during impact, located near the studs, are then reinforced, without making the tube excessively heavy. The total weight of the sleeper is therefore limited, while its mechanical resistance is increased.

[0024] To adjust the position of the center of gravity of the assembled device, and thus facilitate its tilting, holes are provided on the base as well as on the post so that the axes can be arranged on the post or on the base of the device. Furthermore, these additional holes allow the storage of tubes, when the device is dismantled and the studs are arranged against each other.

[0025] In order to arrange the studs regularly and in the right number, without weighing down the device, the crosspiece has a length between flanges of between 400mm and 650mm, preferably between 480mm and 580mm.

[0026] Also with the aim of protecting the device from vandalism or unauthorized disassembly, the end plates each have a print specific intended to receive in engagement a tool of complementary shape to rotate the plates in order to lock the assembly members, and preferably the imprint is hollow.

[0027] To facilitate mounting the device on a non-flat surface, the holes have an internal diameter greater than an external diameter of the ends of the crosspieces, so as to leave a radial clearance of the order of 25 to 35 mm between these diameters. This clearance makes it possible to compensate for misalignments of the device components.

[0028] For the same purpose, the external diameter of the female end is less than the internal diameter of the male end, so as to leave a radial clearance of the order of 2 to 8mm between these diameters, for example approximately 4mm. Brief description of the drawings

[0029] [Fig.1] is a perspective view, seen from above, of the device.

[0030] [Fig.2] is a perspective view, seen from above, of a plot of the device.

[0031] [Fig.3] is an exploded view of an axis of the device.

[0032] [Fig.4] is a perspective view of an end plate of an axle (male plate).

[0033] [Fig.5] is a perspective view of a sleeve of a sleeper.

[0034] [Fig.6] is a perspective view of a tube of a sleeper.

[0035] [Fig.7] is a perspective view of an end plate of an axle (female plate).

[0036] [Fig.8] is an exploded view of a device, mounted in a first configuration. Detailed description of the invention

[0037] With reference to Figure 1, the invention relates to a new anti-ram vehicle device (1), remarkable in that it comprises several axes (30) making it possible to connect several pads (20).

[0038] This configuration makes it possible to obtain a device (1) whose total mass remains limited, because the number of pads (20) is not increased. Nevertheless the resistance of the device (1) is increased to withstand the impact of vehicles weighing up to 7.2 or 25t, at a speed of 50km / h. These criteria are those of the standards in force mentioned above.

[0039] In the illustrated embodiment, the pads (20) have a general size of approximately 1m long, 80cm high and 12cm wide. They are connected by crosspieces (32) fixing their spacing at approximately 50cm wide, so that an assembled device (1) comprises seven pads (20), two axes (30), and measures approximately 4m wide.

[0040] With reference to Figure 2, the studs (20) are preferably manufactured from two lateral sheets (21), connected by spacers (22). Some of these spacers (22) may be provided with a reflector (27) in order to ensure the visibility of the studs (20).

[0041] In order not to slip on the roadway, in particular during the impact of a vehicle, the studs (20) are provided with anti-slip devices (25). Preferably, these are projecting portions of the sheets (21), configured to be fixed in the ground during an impact of a vehicle. These anti-slip devices (25) help the studs (20) to tilt during the impact of a vehicle.

[0042] On the other hand, to ensure their mobility during installation and assembly of the device, the pads (20) are provided with notches (26) allowing transport rollers (not shown) to be fixed thereon. The notches (26) define a path for moving the rollers from a rest position in which the rollers do not touch the ground to a rolling position in which the pad (20) is raised and the rollers are in contact with the ground.

[0043] Furthermore, a plate (28) can be installed between the two sheets (21) in order to provide both a spacer role and a communication support function. For this purpose, the plate (28) is for example engraved or painted.

[0044] The studs (20) have through holes (23) configured to receive an axle (30). The through holes (23) can be arranged both on the base (20s) and on the post (20p).

[0045] Referring to Figure 3, each axis (30) is composed of: - crosspieces (32) intended to fix the spacing between two blocks (20), and - end plates (31).

[0046] The crosspieces (32) and the plates (31) have assembly members allowing them to be connected together during the assembly of the axis (30) via the cooperation of a male end (35) and a female end (37) of these parts (31, 32).

[0047] The plates (31) and the crosspieces (32) comprise flanges (34), so that a bringing together of the flanges (34), preferably obtained during the assembly of the assembly member, involves tightening of the stud (20).

[0048] Preferably, each crossmember (32) is in several pieces, and comprises a sleeve (32m) and a tube (32t). Designing a crossmember (32) in two parts makes it possible to obtain the desired variation in diameter between the male end (35) and the female end (37) in a simple manner. A crossmember (32) can therefore be manufactured economically, from tubes welded together.

[0049] Then it is possible to independently adapt the section of the sleeve (32m) and the section of the tube (32t). In particular, the section of the sleeve (32m) can be adapted so that it is between 950 mm 2 and 1450 mm 2 , preferably between 1100 mm 2 and 1300 mm 2, or even preferably between 1150 mm 2 and 1250 mm 2 The sleeve (32m) being made from steel, its mechanical resistance is then sufficient to withstand the impact of a vehicle of the aforementioned categories.

[0050] Finally, being able to dismantle a crosspiece (32) makes it possible to store the tubes (32t) in the orifices (23), when the device (1) is dismantled for storage and the studs (20) are stored against each other, with their orifices (23) aligned.

[0051] The connection between the crosspieces (32) and the blocks (20) is thus reinforced, without the tubes (32t) being made heavier. For example, their thickness can be limited to approximately 3 mm. When they measure 70 mm in diameter, their section is then only 630 mm. 2 The section of the sleeve (32m) is therefore approximately double the section of a tube (32t).

[0052] The clamping of the stud (20) during the assembly of the assembly members is preferably obtained with assembly members which are of the bayonet type, comprising a transverse rod (36), fixed to a male end (35) of a crosspiece (32) or a male plate (31), and an opening groove (38) provided at the female end (37) of a crosspiece (32) or a female plate (31). The groove (38) comprises a linear portion which opens out, connected to a blind portion which is helical.

[0053] In this way, when the rod (36) penetrates into the groove (38) to the bottom of the linear portion, then the male end (35) is rotated relative to the female end (37), the rod (36) is inserted into the second portion of the groove (38) and prevents the assembly member from being disassembled. The second portion being helical, the rotation of the male end (35) relative to the female end (37) causes the two flanges (34) present on each of the male and female ends to come together. This coming together guarantees the correct tightening of the stud (20).

[0054] With reference to figure 4, a male plate (31 m) therefore comprises a bearing intended to be inserted into an orifice (23) of a stud (20), and a flange (34) intended to clamp a first sheet metal (21) of this stud (20).

[0055] In the illustrated embodiment, the bearing is terminated by a male end (35), comprising a rod (36). The cylindrical bearing is 105mm long, has an outside diameter of 70mm and an inside diameter of 64mm. The rod (36) is 10mm in diameter.

[0056] The male plate (31m) comprises an imprint (39) intended to cooperate with a tool for tightening the assembly members. Preferably this imprint (39) is of a specific shape, i.e. not corresponding to a footprint of a common tool such as a hexagonal, square, or cruciform head, so as to prevent unauthorized disassembly of the device (1).

[0057] The male end (35) is tubular in shape and has an internal diameter greater than an external diameter of a female end (37). Thus, the male end (35) covers the female end (37).

[0058] This design allows the rod (36) to be arranged inside the male end (35), so that the rod (36) does not protrude. It is therefore protected from impacts that may occur when handling the elements of the axis (30) during assembly or disassembly. The robustness of the assembly parts is therefore guaranteed.

[0059] Referring to Figure 5, a sleeve (32m) comprises two female ends, on either side of a flange (34).

[0060] Each female end (37) comprises a bearing surface, on which a through groove (38) is provided.

[0061] In the illustrated embodiment, a first female end (37.1) has two grooves, while the second female end (37.2) has only one groove. This difference between the first female end (37.1) and the second female end (37.2) makes it possible to obtain keying means, preventing the installer of the device from mounting a tube (32t) upside down.

[0062] Each bearing is approximately 90mm long, and is made from approximately 60mm external diameter, 8mm thick tube. The flange (34) is 150mm in diameter, and 8mm thick.

[0063] Referring to Figure 6, a tube (32t) has two male ends extending on either side of a flange (34).

[0064] In the illustrated embodiment, the tube (32t) has a total length of approximately 630mm, in order to fix a spacing between two studs (20) of approximately 530mm. The male ends are similar to those of the male plate (31m), except that the tube (32t) has: - a first male end (35.1) whose rod (36) passes right through the bearing surface, in order to cooperate with a first female end (37.1) provided with two grooves (38); and - a second male end (35.2) whose rod (36) does not pass right through the bearing surface, in order to cooperate with a second female end (37.1) provided with a single groove (38).

[0065] In this way, the assembly of the tube (32t) cannot be reversed, and it is guaranteed that the stud (20) is indeed clamped between two flanges (34).

[0066] A female plate (31 f) has a female end (37), similar to that of a sleeve (32 m), which extends from a flange (34) similar to that of the male plate (31 m). With reference to figure 7, this is a first female end (37.1), since keying means are used.

[0067] Referring to Figure 8, a method of assembling the device (1) is illustrated. It is possible to choose where the axes (30) are placed relative to the studs (20) in order to choose the position of the center of gravity of the device (1), by arranging the axes (30) in different holes (23) of the stud (20).

[0068] Depending on the vehicle to be stopped, it is possible to add an additional axle (30) in order to reinforce the resistance of the device (1).

[0069] Preferably the axes (30) are arranged on the base (20s), and the post (20p) is without axis (30). In this way, the device (1) does not hinder the passage of pedestrians, and only opposes the passage of vehicles.

[0070] In order to guarantee the inviolability of the assembled device (1), rings (24) can be arranged between the two sheets (21) of the stud (20), so that these rings (24) conceal the assembly members once the device (1) is assembled.

[0071] It is possible to place rings (24) on all or part of the orifices (23), depending on the accessibility or vulnerability of the different assembly members.

[0072] For example, an assembly member arranged in the orifice 23.3 may be difficult to access and not require a ring. Or, an assembly member arranged in the orifice 23.2 may be protected by a plate (28): adding a ring (24) at the level of an orifice (23) protected by a plate (28) is superfluous.

[0073] The geometry of the stud (20) is not limited to the embodiment illustrated with a base (20s) and a post (20p), because the operation of the device (1) lies in its tilting upon impact of the vehicle, and in that a part of the stud (20) strikes and damages the engine of the ram vehicle, from below the vehicle. The geometry of the stud (20) can therefore be modified, and present for example a star geometry, that is to say with three arms arranged at 120°, or even a geometry in the shape of an inverted “T”, with a post (20p) arranged in the middle of the base (20s). The desired effect is in all cases that of the stud (20) tilting when it is struck by a vehicle.

[0074] A difference between the internal diameter of the male end (35) and the external diameter of the female end (37) makes it possible to compensate for misalignments of the parts (31, 32m, 32t, 32) constituting the axis (30), due to irregularities in the surface on which the device (1) is placed.

[0075] Similarly, a clearance between the axis (30) and the holes (23) makes it possible to compensate for alignment defects and facilitates assembly.

[0076] The components of the device (1) are preferably made of steel, having an elastic limit greater than 180 MPa, and even more preferably greater than 200 MPa. For example, it is S235 steel. The steel is preferably zinc-plated in order to be effectively protected from corrosion, without however being sensitive to impacts or scratches.

[0077] Furthermore, the device (1) may be shaped differently from the examples given without departing from the scope of the invention, which is defined by the claims.

[0078] For example, the parts (31, 32, 32m, 32t) of the axle (30) do not necessarily include a keying means. These keying means are, for example, superfluous in the case of single-piece crosspieces (32).

[0079] Furthermore, the technical characteristics of the different embodiments and variants mentioned above can be, in whole or in part, combined with each other. Thus, the device (1) can be adapted in terms of cost, functionality and performance.

Claims

Claims [Claims 1] Device (1) for an anti-ram vehicle barrier, comprising studs (20) made of mechanically welded steel, spaced apart from each other and connected to each other, characterized in that the studs (20) are connected by at least two axes (30) mounted in orifices (23) passing through the studs (20), the axes (30) comprising: - at least one steel crosspiece (32) having: - an intermediate portion bordered by two flanges (34), - two ends equipped with assembly members; - two end plates (31) having: - a range bordered by a flange (34),; - one end equipped with assembly members; the assembly members being designed to connect together two crosspieces (32) or one crosspiece (32) and a plate (31), so that each stud (20) is laterally constrained by two flanges (34). [Claims 2] Device (1) according to claim 1, characterized in that each stud (20) comprises rings (24) configured to conceal the assembly members. [Claims 3] Device (1) according to one of the preceding claims, characterized in that the assembly members are in the form of a bayonet comprising: - a transverse rod (36) fixed to the end called the “male end” of a crosspiece (32) or a plate (31), and - a through groove (38) provided at the end called the "female end (37)" of a crosspiece (32) or a plate (31), so that when the male end (35) is assembled with the adjacent female end (37), the rod (36) is housed in the helix-shaped or bayonet-shaped cutout, and the rotation of the male end (35) relative to the female end (37) brings the adjacent flanges (34) closer together, and laterally constrains the stud (20) between said flanges (34). [Claims 4] Device (1) according to claim 3, characterized in that the female end (37) has an external diameter less than an internal diameter of the male end (35), so that the male end (35) covers the female end (37) when assembling the bayonet. [Claims 5] Device (1) according to one of the preceding claims, characterized in that each crosspiece (32) comprises a sleeve (32m) and a tube (32t) connected by assembly members, preferably the sleeve (32m) has two female ends (37) and the tube (32t) has two male ends (35). [Claims 6] Device (1) according to claim 5, characterized in that the section of the sleeve (32m) is greater than the section of the tube (32t). [Claims 7] Device (1) according to one of the preceding claims, characterized in that orifices (23) are provided on the base (20s) as well as on the post (20p). [Claims 8] Device (1) according to one of the preceding claims, characterized in that the crosspiece (32) has a length between flanges (34) of between 400mm and 650mm, preferably between 480mm and 580mm. [Claims 9] Device (1) according to one of the preceding claims, characterized in that the plates (31) each have a specific imprint (39) intended to receive in engagement a tool of complementary shape to rotate the plates (31), preferably the imprint (39) is hollow. [Claims 10] Device (1) according to one of the preceding claims, characterized in that the orifices (23) have an internal diameter greater than an external diameter of the ends of the crosspieces, so as to leave a radial clearance of the order of 25 to 35 mm between these diameters.

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