FR2814766A1 - SAFETY BARRIER FOR VEHICLE TRAFFIC CHANNELS WITH AT LEAST ONE PROTECTIVE SCREEN - Google Patents

Abstract

The safety barrier is intended to be arranged along vehicle traffic lanes, and it comprises on the one hand at least one horizontal rail secured to vertical supports and on the other hand a lower screen called "protective" having two upper and lower edges respectively, and intended to oppose the passage under the rail of a two-wheeled vehicle accident, sliding flat on the road and / or its user fallen to the ground. It is characterized in that the lower protective screen (10) is suspended from the barrier by arms (1 1) which extend above the upper edge of the lower screen (10) and which are fixed to the single rail (3) or to that (42) of the rails (40, 41 and 42) which is closest to the ground, the lower screen (10) extending in a substantially vertical mean plane situated clearly below the vertical supports (1) for an observer located on the taxiway (A).

Description

Safety barrier for vehicle taxiways equipped with

  The present invention relates to safety barriers which are placed along vehicle taxiways and which comprise at least one rail parallel to the ground and vertical supports. These barriers have the disadvantage of leaving a lower space under the rail, of sufficient height that a motorcyclist injured and slipping on the ground can be seriously injured, either because it gets stuck between the ground and the bottom of the smooth, either because it is projected against the vertical supports behind the rail, supports

  which are numerous, rigid and blunt, that is, extremely dangerous.

  For these barriers to be protective not only for passengers of cars, trucks and coaches but also for motorcycle users with or without a sidecar, and generally for anyone who, accidentally, is projected on the road to circulation, it has already been thought to fill the lower space by means of a plane screen, formed

plates attached end to end.

  But the solutions known to date have not been entirely satisfactory, particularly because of the rigidity specific to the proposed screens and the difficulties of

fixation that they entail.

  To establish the state of the art, mention may be made of the following documents: Patent FR 2 556 755, which describes an intermediate piece placed between the rail and each vertical support, well known per se under the name of "spacer", and which differs from standard parts in that it has "mounting means for attaching additional bodies", the latter as far as

  this presentation, which can be a vertical screen placed under the rail.

  This solution is to be excluded because the mounting means are essentially holes to receive bolts, as specified in claim 2 of this patent, and these holes severely modify the mechanical characteristics of the spacer, and it is the barrier whole which should be redesigned to play its role

  despite the weakening of the spreaders.

  3n Patent FR 2 751 998 which describes a device intended in particular to "stop a motorcyclist after a fall", which is constituted by the assembly of box parts to surround the vertical supports of a safety barrier and joined by

horizontal metal rods.

  These boxes are very expensive, not only because of their cost of manufacture but also because of the difficulty of assembly, because it is necessary to assemble the boxes in place, engage the horizontal metal rods, achieve a correct alignment and ensure blocking the whole. When everything is in place, the result obtained is practically unusable because of the mechanical characteristics of this device which far from damping shocks and protect a person injured, on the contrary presents two drawbacks that accumulate: The caissons themselves are hollow and synthetic material, so that they have a clean elasticity whose major fault is to push back the person and / or the motorcycle accident in the lane when this person and / or this motorcycle is projected against them, while l we always try to avoid this elastic return effect for obvious reasons of safety; The horizontal metal rods are supported on the vertical supports and this set is very rigid, so very aggressive for an object projected against him, motorcycle or

human body.

  As a result, an object thrown against this device bounces back toward the taxiway when the impact is not too great and collapses against the support rod assembly when the impact is violent. It can be added that the boxes of synthetic material can be damaged and then have tears whose edges are

likely to hurt a body.

  The present invention deviates quite well from known solutions and makes it possible to produce protective screens which are easy to mount and which have the same absorption effects.

  of energy, without elasticity, that the rails of approved barriers.

  To this end, the subject of the invention is a safety barrier intended to be arranged along vehicle taxiways, which comprises at least one horizontal rail which is fastened to vertical supports and which furthermore comprises a lower screen called protection "having two edges respectively upper and lower, and intended to oppose the passage under the smooth of a vehicle with two wheels accident, sliding flat on the taxiway and / or its user fallen to the ground, characterized in the lower protection screen is suspended from the barrier by arms extending above the upper edge of the lower screen and which are attached to the single arm or to the rails which is closest to the ground, the lower screen extending in a substantially vertical middle plane located well below the vertical supports for a

  observer located on the taxiway.

  According to other features of this security barrier:> the arms are distinct from the lower screen and attached to it; the arms are configured to each have an upper attachment base intended to be secured to the rail, a lower attachment base intended to be secured to the lower protection screen, and a middle part which joins the two

  mounting bases and which extends directly or after folding (s) and / or bending (s)

  beyond the lowest part of the rail for an observer on the taxiway; > the upper attachment base is secured to the rail by the same or the same organs by which the rail is secured to the vertical supports; > the barrier comprising an intermediate element called "spacer" interposed between each vertical support and the rail, the upper mounting base is placed between the rail and said spacer, the fasteners joining the rail and each spacer through the holes of said base, the latter being tightly tightened by these members between the rail and each spacer; > the smooth of the barrier is constituted by segments fixed in line with each other and each formed by a metal profile with two superimposed waves extended by divergent inclined wings, upper and lower, whose edges are free and oriented to the opposite of the traffic lane, smooth which is fixed to the vertical supports by its median portion located between the two waves, the barrier being characterized in that the upper attachment base is applied to the lower part of the lower wing and secured at said lower part; the middle part of each arm is bent to follow the low profile of the lower wing of the arm; > the upper attachment base is applied under the upper part of the lower wave and secured to this upper part; the middle part of each arm is bent to follow the high profile of the lower wave of the arm; the lower protection screen has a substantially vertical plane face and at least one folded edge opposite the traffic lane; > The rim is folded obliquely towards the ground and is close to, or even in contact with, vertical supports; > the lower protection screen has a substantially vertical face having an alternation of at least two respectively convex and concave waves, for an observer located on the taxiway; > the lower screen has a convex lower part extended by a wing ending in a free edge which is oriented opposite the taxiway; > the arms are virtual and consist of an upper extension of the lower screen; the extension is shaped to conform to the outline of a part of the stringer to which it is attached; > the barrier comprises a wooden slant notched with a rear groove in which there is a metal section to which are attached support arms of the lower screen independently of the attachment of the bar to vertical supports; > the barrier comprises, in addition to the lower screen, an upper screen arranged horizontally and extending from the upper part of the rail, to which it is fixed by arms, beyond the vertical plumbs of the supports for an observer on the taxiway; > the arms are distinct from the horizontal upper screen and attached to it; the arms are configured to each have a so-called "front" mounting base intended to be secured to the upper part of the rail, a so-called "rear" mounting base intended to be fastened to the horizontal upper screen, and a middle part which joins the two fixing bases and which extends directly or after folding (s) and / or bending (s) to a level higher than that of the highest part of the lise and that of the top of the supports vertical; > the smooth of the barrier is constituted by segments fixed in line with each other and each formed by a metal profile with two superimposed waves extended by divergent inclined wings, upper and lower, whose edges are free and oriented to the opposite the taxiway, the barrier being characterized in that the front fixing base is applied to the upper part of the upper wing and secured to said upper part; the middle part of each arm is bent to follow the upper profile of the upper wing of the arm; the front fixing base is applied under the upper part of the upper wave and secured to this upper part; the middle part of each arm is bent to follow the high profile of the upper wave of the arm; > the upper protection screen has a substantially flat horizontal face

  and at least one flange folded towards the ground.

  The invention will be better understood from the detailed description given below with reference to

  attached drawing. Of course, the description and the drawing are given only as

  indicative and non-limiting example.

  FIG. 1 is a partial schematic view of a safety barrier according to the invention, the lower screen of which is suspended from arms fixed to the lower part of the wave.

lower of the smooth.

  FIG. 2 is a diagrammatic sectional view of the safety barrier of FIG. 1.

  Figure 3 is a schematic sectional view of a safety barrier according to the invention, the lower screen is suspended from the arms attached to the upper part of the wave

lower of the smooth.

  FIG. 4 is a schematic perspective view of a suspension arm of the screen

  bottom of the barrier of Figure 3.

  FIG. 5 is a diagrammatic sectional view of a safety barrier according to the invention, the lower screen of which is suspended from arms also fixed to the upper part;

  of the lower wave of the smooth, but having a particular profile.

  Figure 6 is a schematic perspective view of a suspension arm of the screen

  bottom of the barrier of Figure 5.

  Figures 7, 8 and 9 are schematic sectional views of a safety barrier according to the invention, the lower screen is suspended from the arms attached to the part

  median of the smooth, according to three different variants of the profile of these arms.

  FIG. 10 is a schematic sectional view of a safety barrier in accordance with FIG.

  the invention, of the type having three superimposed smooth closed section.

  FIGS. 11 and 12 are diagrammatic sectional views of a barrier according to the invention, of the type having a wooden rail attached to vertical supports also of wood, the lower screen being suspended from virtual arms constituted by an extension

top of the screen.

  FIG. 13 is a partial schematic perspective view of a safety barrier according to the invention, of the type having a wooden rail attached to vertical supports also of wood, the lower screen being suspended from arms fixed to the smooth by the party

back of it.

  FIGS. 14, 15 and 16 are diagrammatic cross-sectional views of a barrier according to the invention, having an upper protective screen attached to arms that are subjected to the rail in three different places, namely respectively in the upper part of the upper wave, in

  middle part of the smooth and lower part of the upper wave.

  Referring to Figures 1 and 2, there is shown a safety barrier according to the invention which, with this example, is made from a standard base, namely vertical supports 1 fixed to the ground, fixed spacers 2 at the upper part of the supports 1 and a rail 3 formed by segments of metal profiles fixed to each other with a slight overlap of the downstream ends by the upstream ends (in the direction of vehicle traffic), in "fish scales ", as is well known, the smooth having two superimposed longitudinal waves 4 and 5, symmetrical with respect to a flattened surface 6 and extended by wings respectively 7 and 8 whose free edges are directed to

  the opposite of the vehicle circulation lane A, situated at the front of FIG.

  According to the invention, the safety barrier comprises a lower protection screen 10 which, in FIG. 1, is presented in front of the barrier, before it is put in place, whereas in FIG. 2 it is represented in its place suspended on the beam 3 by

  arm 11 and completely masking the space between the bottom of the rail 3 and the ground.

  With the example of Figures 1 and 2, the barrier has an arm 11 to the right of each vertical support 1 and each of these arms 11 is constituted by a metal strip, in particular galvanized steel as the smooth 3, and folded to present a upper base 12, a lower base 13 and a middle portion 14 having here two

V-shaped branches 15 and 16.

  The upper base 12 is notched with a slot 17 intended to be located opposite one or more holes (not visible in the drawing) drilled for this purpose in the rail 3, the attachment of the arm 11 by its base i2 is by means of one or more bolts 18 passing through the holes of the rail 3 and the slot 17 behind which one locks each bolt

18 by a nut 19.

  The lower base 13 is traversed by a vertical light 20 intended to be opposite

  an equally vertical light 21 formed in the screen 10.

  The screen 10 is formed of a sheet folded near its two longitudinal sides to form a flat central portion and two flanges at 45, respectively upper 22 and lower 23. The upper flange 22 applies exactly on the branch 16 of the middle portion 14 in the position shown in Figure 2 which corresponds to the assumption o the lower edge 23 of the screen 10 must occupy its maximum low position to be close to the ground,

while sparing a small space.

  If the sill 3 was closer to the ground, it would be necessary that the screen 10 can be reassembled, which is obtained through the cooperation of the two lights 20 and 21 because they can occupy different relative positions in height without prevent fixation

  a bolt 18 and its locking nut 19.

  For the record, it is recalled that the beam 3 is fixed to the spacers 2 by bolts 18 engaged on the one hand in holes (not visible in the drawing) formed in the flat part 6 and on the other hand in the front face of each spacer 2, these bolts 18 being also

  blocked by standard nuts 19.

  A safety barrier according to the invention can be made from scratch by mounting new components, in which case the holes of the bar for fixing the arms 11 are made in the workshop. After that, we proceed as usual: setting up

  vertical supports 1 and spacers 2, then fixing the rail 3 (Figure 1).

  Then, the arms 11 are placed and fixed to the rail 3, then the screen 10 is presented (FIG. 1) and applied against the lower bases 13 of the arms 11, as suggested by the dashed arrows. . The bolts 18 are engaged in the adjoining lumens 20 and 21 and the height of the screen 10 is adjusted before locking the bolts 18

  by nuts 19, as explained above.

  This provides a safety barrier with a lower protection screen, such as

  this is shown in Figure 2.

  But a safety barrier according to the invention can also be made from a

  existing base and already mounted on site: vertical supports 1, spacers 2 and smooth 3.

  To do this, it suffices to drill on the spot the mounting holes of the arms 11. After drilling and fixing the arms 11, we find ourselves in the situation of FIG. 1, and we finish the production by fixing the screen segments to the arms 11, after adjusting their height. It is observed that here the upper attachment base 12 is applied against the part

  lower of the smooth, wave 4 and / or wing 7.

  The median portion 14 of the V-shaped arm 11 allows deformation at least partially by pivoting the screen 10 along the arrow F1, as shown schematically in FIG. 2. Since the arm 11 is manufactured in a metal strip, the deformation

  that the middle part 14 undergoes during a substantial horizontal shock is final, that is to say

  say that there is no elastic return and the resistance to deformation is established by properly calculating the thickness of the metal strip constituting the arm 11,

considering the chosen metal.

  But above all, the total freedom of the screen 10 at its lower part (whose rim 23 is

  above the ground) and the fixing of the arm 11 on the rail 3, and particularly in the lower part thereof, allow to benefit from the deformability specific to the rail 3, so that the screen 10, the arms 11 and the beam 3 together constitute a deformable structure whose characteristics result from the more or less complex combination

  faculties specific to each component.

  In FIG. 1, it can be seen that the screen 10 is traversed by other lights in addition to the light 21. A light 24 is aligned and below the light 21, and two other lights 25 and 26 located one above the other. above each other, aligned horizontally respectively with the

light 21 and with light 24.

  These lights are intended to receive bolts fixing a screen segment to another identical segment (not shown), the end of one covering the end of

  the other in fish scales, as the segments constituting the bar 3.

  However, good results have been found in tests by not fixing the screen segments to each other but, on the contrary, leaving a narrow slot between them, which allows the screen segments to deform individually, depending on the point of impact, whereby the deformation is obtained with less kinetic energy, thus causing the injured person a less traumatic reaction. In addition, the neighboring screen segments are not deformed, the restoration of the barrier is done

  more simply and cheaply.

  Referring now to FIG. 3, it can be seen that the plate 12 of the arm 11 to which the screen 10 is suspended is still subject to the lower part of the beam 3, below

  of the flat 6, but at the top of the wave 4 and no longer at the bottom.

  In FIG. 4, we see the arm 11 only whose lower base 13 is vertical and in the

  extension of the middle part 14, itself flat and vertical.

  This embodiment is well suited to the barriers whose wings 7 and 8 extend slightly towards the rear of the barrier because the arm 11 can descend directly to below the

lowest level of wing 7.

  With this embodiment, the screen 10 has no upper rim 22 and its leveling is not simple vertical translation on the arms 11 previously fixed. FIG. 5 represents a variant of the previous embodiment adapted to the case where it is desired that the screen 10 also has the upper rim 22, in particular for reasons of rigidity, since, as we know, a longitudinal fold on a sheet to create a ledge is a means of stiffening, because of the impediment it creates to its

transverse deflection.

  However, it is necessary to be able to better adjust the height of the screen 10 relative to the

  ground, and the rim 22 must be able to be in height.

  The arm 11 (FIG. 6) thus has a median portion 14 whose profile is adapted to the correct positioning of the upper base 12 under the upper part of the lower wave 4, and of the lower base 13 behind the screen 10 , below the level of

edge 22.

  The upper base 12 is identical to that of the arm 11 of Figure 4, and is integral with an inclined plane 27 whose slope corresponds to that of the spacer 2 which it avoids (which it is not fixed) inclined plane 27 which connects to a vertical portion 28 itself

  connected to an oblique return 29 integral with the lower base 13.

  The fixing of the screen 10 to the lower base 13 is always done by bolting the lights 20 and 24 and it has been shown here that one could predict not only a single set

  bolt 18 - nut 19 but two superimposed (figure 5).

  It can be seen in FIG. 5 that the screen 10 is in the high position while it is in the lower position in FIG. 4, in accordance with the indications given above for the adjustment.

in height of the screen 10.

  Referring now to Figures 7 and 8, there are two embodiments similar to those of Figures 3 and 5 with respect to the profile of the arms 11 and having the characteristic of providing the attachment of the arms 11 to the rail 3 by the same system and in the same place as the attachment of the rail 3 to the spacers 2, that is to say that the upper attachment base 12 is placed between the front face of the spacer 2 and the rear face of the

flat 6 of the smooth 3.

  In addition to simplifying the fixing by the same bolts 18 - nuts 19 placed in the standard holes of the spacer 2 and the rail 3, this arrangement has the advantage of raising the attachment area of the arms 1 1 and gives them more height, so that their radius of rotation under the effect of a horizontal shock at the bottom of the screen 10 is longer. In FIG. 7, it can be seen that the pivoting along the arrow F2 has as its axis the horizontal line of the front face of the spacer 2 against which the arm 11 folds. In FIG. 8, the pivot axis is the line of folding which joins the inclined plane 27 and the part

vertical 28.

  FIG. 9 represents a variant of the embodiment of FIG. 8, according to which the lower fixing base 13 is provided with an oblique extension 30 whose length and the inclination towards the rear are determined in such a way that the free edge

  this extension is in contact with the vertical support 1 to the right of which it is placed.

  When an impact is applied to the screen 10, the latter moves back and pivots the arm 11 like that of FIG. 8, according to the arrow F4, but, in addition, the extension 30 deforms downwards and rubs against the vertical support 1 behaving like an element

  deforming which slows the pivoting of the screen 10 and adds to its resistance.

  We choose the parameters involved: nature and thickness of the metal, length of the pivoting radius (equivalent to a lever arm), profile of the arms, etc. depending on the flexibility sought, being reminded that this flexibility should not be confused with the elasticity which is a serious defect in this case, so that flexibility is here, for the security screen, the faculty more or less to deform in the direction of shock received, without return in the opposite direction, to better absorb the kinetic energy of the shock. In FIG. 10, a safety barrier of a type different from that of the

previous examples.

  This safety barrier comprises three superposed rails 40, 41 and 42 fixed directly to vertical supports 1, without the interposition of spacers, and whose profile does not

  presents no waves since it is closed on itself.

  The lower safety screen 10 is suspended from arms 11 of profile close to that of the arm of FIG. 7, although the middle part 14 which connects the upper attachment base 12 and the lower attachment base 13 is formed of a simple inclined segment whose utility is not to avoid the free edge of a wing since there is no wave or wing here, but to postpone towards the taxiway A vertical plane of the screen! , so that it is below (for an observer located on the taxiway A) of the front face of the lower rail 42 and a gusset 43 forming part of the structure of the barrier. The upper base 12 is secured to the rail 42 by the same fastening means as those which fix the rail 42 to a vertical support 1, which is similar to that described

  above with reference to Figures 7 and 8.

  The fixing of the screen 10 only requires bolt assemblies 18 nuts 19 for the lower base 13, the other fasteners being anyway necessary

  attaching the beam 42 to the vertical supports 1.

  The application of the invention to this type of barrier is therefore particularly simple since all the elements can be prepared in the workshop and mounted on site on a barrier already in place. The only possible adaptation is to replace the existing bolts that secure the beam 42 to the vertical supports 1 by bolts a little longer, to allow the insertion of the upper base 12, and that depending on

the thickness of it.

  FIGS. 11 and 12 show a known type of security barrier,

  comprising a wooden beam 50 secured to vertical supports 51 also of wood.

  There are variants of these barriers: some have a wooden rail and vertical metal supports, bare or dressed in wood, others have wooden rails reinforced with metal profiles interposed between the wooden part of the rail and supports vertical, etc. We wanted to show here the adaptation of the invention to a smooth part or totally

in wood.

  The solution of the wood is chosen for aesthetic reasons, so as not to modify the natural aspect of a landscape by a manufactured metal fence, the passing wood

  almost unnoticed or, in any case, still being very well integrated into a landscape. This concern leads to making the security barrier as discreet as

  possible and efforts are made to make the safety barrier (intended for vehicle traffic lanes) look like a traditional barrier, usually installed to prevent the wandering of vehicles.

animals.

  The security screen must therefore also "be forgotten" and we avoid the use of elements

  more or less visible metal, especially the arms 11 which are virtual here, that is to say

  say undifferentiated screen 10 itself.

  It is then designed to have a continuous upper extension 1 Oa, pierced with holes (not visible in the drawing) distributed over the entire length of the screen 10, at a distance from the free edge of the extension 10a and in each of which we engage

  a fixing member such as a lag screw 52 screwed into the wood of the beam 50.

  The extension 10Oa has a curved shape along an arc of the same radius as that of the rail 1 in order to be able to be applied against said rail 50, in a more or less extended arc. In FIG. 11, the extension 10a is applied under the rail 50 and in an area situated in front of the vertical axis x of the rail 50, the screen 10 thus suspended must always be located clearly in front of the vertical supports 51, as explained above

Many times.

  In this situation, the extension 10a is relatively small since it does not have

  apply only on a small arch.

  In FIG. 12, the extension 0la is applied under the rail 50 and in an area behind the vertical axis x of the rail 50 and since the screen 10 must always be suspended clearly in front of the vertical supports 51, the extension 1 Oa is here more extensive since it must be applied on an arc at least equal to that which covers the circumference of the rail 50 from the free edge of the extension 10after the line of

the vertical axis x.

  The screen 10 could be flat, as described and shown for the previous embodiments. However, when the arm 50 is formed by the abutment of sections of wood, its lowest part is higher than the lowest part of a metal profile with two waves, so that the lever arm, equal to the length of the pivot axis of the screen

  10 during a shock, is very large and could make the screen 10 too flexible.

  This is why FIGS. 11 and 12 show a screen 10 having a profile of

  wavy form for stiffening.

  In FIG. 11, the screen 10 presents, for an observer located on the vehicle circulation path A, two longitudinal concavities 10 0b and 10 Oc and two convexities.

longitudinal 1 Od and 10 Oe.

  The lower convexity 10e has a lower extension 1 Of of equal or similar radius of curvature, so as to form a wing capable of coming into contact with one or more vertical supports 51, in order to produce the same effects as those described in FIG.

  look at Figure 9 about the extension 30, and that we will not repeat here.

  In FIG. 12, the screen 10 presents, for an observer located on the vehicle circulation path A, a single longitudinal concavity 1 Og between two convexities.

longitudinal 1 Oh and l Oi.

  The lower convexity 10i has a lower extension 1 Oij of equal or similar radius of curvature, so as to form a wing capable of coming into contact with one or more vertical supports 51, in order to produce the same effects as those described in FIG.

  look at Figure 9 about the extension 30, and that we will not repeat here.

  FIG. 13 shows a particular embodiment of the invention according to which the barrier comprises a wooden rail 50 and vertical supports also made of wood 51, but the rail 50 has a longitudinal groove 53 in which there is a rail

metal 54 with "C" section.

  The core 55 of the profile 54 is placed in the bottom of the groove and the branches 56 have the same depth as the groove 53, so that the returns 57 are flush with the outer contour of the rail 50 and create, while facing the one of the other, a longitudinal slot 58

narrower than the groove 53.

  The screen 10 is suspended from the arm 50 by arms 11 having an upper fixing base 12 and a lower fixing base 13 both vertical and offset,

  joined by a central portion 14 slightly oblique.

  The base 12 is notched with a slot 17 for a bolt 18 tightened by a special nut 59 (of the type known to those skilled in the art) of oblong shape for introducing it horizontally into the slot 58 and which locks against the branches 56 of the profile 54

  when placed in a vertical position.

  Thanks to this blocking, the nut 59 is immobilized and the bolt 18 can be screwed from the outside to fix the base 12 of the arm 11 at any point of the section 54 and,

therefore, the smooth 3.

  The latter is fixed to the vertical supports 51 by any known means,

  regardless of the attachment of the arms 11 to support the screen 10.

  As already described, the screen 10 is fixed to the base 13 of the arm 11 by a bolt 18

and a nut 19.

  Referring now to FIGS. 14 to 16, one embodiment of the invention can be seen in three different variants and which consists in equipping the safety barrier with a top security screen, independently of the security screen.

  lower 10 which has been described with reference to Figures 1 to 13.

  Experience has shown that during an accident, vehicle passengers are sometimes thrown high and fall back onto the safety barrier. This is particularly the case for motorcycle users, drivers or passengers, although this also happens for users

  passenger cars or coaches that are sometimes ejected from the vehicle.

  However, the existing safety barriers are all designed to minimize the consequences

  side and not vertical shocks, from top to bottom.

  The vertical supports, with or without spacers, are particularly aggressive for a human body falling on them with force, because these supports have a very high vertical inertia and rigidity which makes them absolutely incapable of absorbing the kinetic energy of a falling body. on them and, if one admits to consider negligible material damage they can cause a vehicle, it is obviously not the same for assaults to people, because the vertical supports report the entire kinetic energy on the human body which, most of the time, does not resist and the result is very serious fractures, including that of the pelvis, spinal fractures, including cervical vertebrae, perforations of the stomach, etc. The smooth itself can become dangerous if a human body is thrown on it from top to bottom or back to front as the free edge of the upper wing becomes sharp and

  cases of almost complete decapitation have been observed.

  The upper screen 60 according to the invention extends horizontally from front to back and its free edge 61 furthest from the channel A is beyond the plumb of the supports.

  Vertical 1, in the manner of an awning.

  The screen 60 is secured to the rail 3 by arms 62 similar to the arms 11, thus comprising a fastening base 63 for their attachment to the rail 3, a fastening base 64 for their attachment to the screen 60 and a part intermediate 65 may have different profiles depending on the particular shapes of the elements that make up the

security fence.

  It is observed that the screen 60 is held only by one of its longitudinal sides, in order to allow it to yield from top to bottom by pivoting according to the same principle as that which has been

described above for the screen 10.

  In FIG. 14, the arm 62 is fixed under the upper part of the rail 3 and its base 63 is shaped so that it is well pressed against the upper wing 8 of the rail 3 and, in certain cases, it can be provided that the base 63 is partially applied against the wing 8 and

  partly against the upper wave 5.

  The upper screen 60 is flat and has a stiffening flange 66 folded towards the ground

  to avoid any risk due to the sharpness of the free edge 61.

  In FIG. 15, we see a variant according to which the arm 11 of the lower screen 10 and the

  arm 62 of the upper screen 60 are in one piece and have a mounting base 12 -

  63 common, placed between the flat 6 of the smooth 3 and the front face of the spacer 2, whereby the lower arm 11 and upper 62 are made in a single folding operation and the single arm is fixed which results from the same fastening elements of the rail

  3 at the front of the spreader 2.

  In FIG. 16, the lower screen 10 is fixed by the base 12 of the arm 11 to the upper part of the lower wave 4 and the upper screen 60 is fixed by the base 63 of the arm

  62 at the lower part of the upper wave 5.

  This arrangement has the advantage that the fasteners of the two arms 11 and 62 are symmetrical

  relative to the flat part 6 and the fastening members of the rail 3 to the spacer 2.

  The fixing members are advantageously bolt assemblies 18 nuts 19 and so that the bolt heads are not aggressive in the event of impact, the bolts 18 are preferably of the round head type, and are engaged in holes stamped in a bowl, as well as this is well known in itself. This precaution is particularly recommended

  for fixing the upper screen 60 to the arms 62.

  The invention makes it possible to adapt a lower and / or upper protection screen 60 to all types of safety barriers since the profile of the safety barriers can be easily adapted.

  arm to that of the different smooth possible.

  Smooth 3 of FIG. 16 has a slightly different profile from that of the slats of the preceding figures, but the upper and lower relief portions have nevertheless been called "waves", although they both have flat frontal parts because this does not change the application of the invention. This profile is well known per se and we see that the lower wings 7 and 8 are relatively short. To prevent the free edge of the upper flange 8 from being freely exposed and thus presenting a potential danger, it would be possible to give the median portion 65 arms 62 a profile such that this median portion 65 is inclined towards the free edge of the wing 8, then bent backwards, to fill the space beyond this free edge, which does not diminish the flexing capacity of the arms 62.

Claims (24)

  1. A safety barrier intended to be arranged along vehicle taxiways, which comprises at least one horizontal rail subject to vertical supports and which further comprises a lower screen called "protection" having two respectively upper and lower edges , and intended to oppose the passage under the smooth of a vehicle with two wheels accident, sliding flat on the taxiway and / or its user fallen to the ground, characterized in that the lower screen   protector (10) is suspended from the barrier by arms (11) which extend   above the upper edge of the lower screen (10) and which are attached to the single rail (3) or to that (42) of the smooth (40, 41 and 42) which is closest to the ground, the lower screen (10) extending in a substantially vertical middle plane substantially below the vertical supports (1) for an observer on the track of circulation (A).   Safety barrier according to claim 1, characterized in that the arms (11) are   separate from the lower screen (10) and attached to it.   3. Safety barrier according to claim 2, characterized in that the arms are configured to each have an upper attachment base (12) to be secured to the rail (3), a lower mounting base (13) for be secured to the lower shield (10), and a medial portion (14) which joins the two attachment bases (12 and 13) and extends directly or after folding (s) and / or bending (s) ) beyond the lowest part of the beam (3 - 42) for a   observer on the taxiway (A).   4. Safety barrier according to claim 3, characterized in that the base of   upper attachment (12) is secured to the beam (3) by the same or   10) than those by which the rail (3) is secured to the vertical supports (1).   5. Safety barrier according to claim 3, characterized in that the barrier comprising an intermediate element called "spacer" (2) interposed between each vertical support (1) and the rail (3), the upper mounting base ( 12) is placed between the beam (3) and said spacer (2), the fasteners (18 - 19) joining the arm (3) and each spacer (2) through holes in said base (12), this last being tightly tightened by these members (18 - 19) between the beam (3) and each spacer (2).   6. Safety barrier according to claim 3, the smooth (3) is constituted by segments fixed in line with each other and each formed by a metal profile with two superimposed waves (4 and 5) extended by diverging inclined wings , upper (8) and lower (7), whose edges are free and oriented away from the smooth running path (A) (3) which is fixed to the vertical supports (1) by its middle part (6). ) located between the two waves (4 and 5), characterized in that the upper attachment base (12) is applied to the lower part of the rail (3) and   subject to the said lower part.   7. Safety barrier according to claim 6, characterized in that the middle portion (14) of each arm (11) is bent to follow the low profile of the lower flange (7) of the smooth (3).   8. Safety barrier according to claim 6, characterized in that the upper attachment base (12) is applied under the upper part of the lower wave   (4) and subject to this upper part.   9. Safety barrier according to claim 8, characterized in that the middle part (14) of each arm (11) is bent to follow the high profile of the lower wave (4) of the smooth (3).   10. Safety barrier according to claim 1, characterized in that the lower protective screen (10) has a substantially vertical plane face and at least one   flange (22-23) folded away from the taxiway (A).   11. Safety barrier according to claim 10, characterized in that the flange (23) is folded obliquely towards the ground and is close to or even in contact with vertical supports (1). 18 2814766   12. Safety barrier according to claim 1, characterized in that the lower protective screen (10) has a substantially vertical face having an alternation of at least two respectively convex waves (10d and 10e, 10h and 10i   and concave (10b and 10c, 10Og), for an observer located on the taxiway (A).   13. Safety barrier according to claim 11, characterized in that the lower screen (10) has a convex lower portion ending in a free edge which is oriented to   the opposite of the taxiway (A).   Safety barrier according to claim 1, characterized in that the arms are   virtual and constituted by an upper extension (10a) of the lower screen (10).   15. Safety barrier according to claim 13, characterized in that the extension (10a) is shaped to fit the contour of a portion of the rail (50) to which it is attached.   16. Safety barrier according to claim 1, characterized in that it comprises a smooth (50) wood notched with a rear groove (53) in which there is a metal section (54) to which are attached arms (11). ) of lower screen support   (10) independently of the attachment of the beam (50) to vertical supports (51).   17. Safety barrier according to claim 1, characterized in that it comprises, in addition to the lower screen (10), an upper screen (60) arranged horizontally and extending from the upper part of the rail (3). , to which it is fixed by arms (62), beyond the vertical supports (1), for an observer   placed on the taxiway (A).   Safety barrier according to Claim 17, characterized in that the arms (62)   are distinct from the horizontal upper screen (60) and attached to it.   19. Safety barrier according to claim 18, characterized in that the arms (62) are configured to each have a so-called "front" mounting base (63) intended to be secured to the upper part of the rail (3), a so-called "rear" mounting base (64) intended to be fastened to the upper horizontal screen (60), and a middle part (65) which joins the two attachment bases (63 and 64) and which extends directly or after folding (s) and / or bending (s) to a level higher than that of the   highest part of the lise (3) and that of the top of the vertical supports (1).   20. A safety barrier according to claim 19, the arm of which consists of segments fixed in line with each other and each formed by a metal section with two superimposed waves extended by divergent inclined wings, upper and lower, whose edges are free and oriented opposite the traffic lane, characterized in that the front fixing base (63) is applied to   the upper part of the upper wing (8) and secured to said upper part.   21. Safety barrier according to claim 18, characterized in that the middle portion (65) of each arm (62) is bent to follow the upper profile of the wing upper (8) of the beam (3).   22. Safety barrier according to claim 18, characterized in that the front fixing base (63) is applied under the upper part of the upper wave (8) and   subject to this upper part.   23. Safety barrier according to claim 22, characterized in that the median portion (65) of each arm (62) is bent to follow the high profile of the wave upper (8) of the beam (3).   24. Safety barrier according to claim 1, characterized in that the upper protective screen (60) has a substantially horizontal plane face and at least a flange (66) folded towards the ground.