FR2540237A1 - RIGID PROTECTION ELEMENT WITH SEVERAL LAYERS, IN PARTICULAR A HELMET - Google Patents

Abstract

Rigid protective element with several layers, preferably for protecting the human body or parts thereof, in particular a helmet, consisting of an inner shell of plastic material, an intermediate layer, preferably textile, a plastic outer shell and a channel-shaped profiled molding connecting the two shells. The profiled molding 5 comprises a rib 8 which rests internally on the edge of this preferably outer shell 1, the edge 6 of the preferably outer shell 1 which hooks into the profiled molding 5 and which comprises a domed, bent portion or the like, being crimped by the outer flange 7 of the profiled molding 5. (CF DRAWING IN BOPI)

Description

The present invention relates to an element of

  intrinsically rigid, multi-layered, projectile and / or splinter arresting

  the protection of the human body or part of it,

  a helmet, comprising an inner shell made of: plastic material, at least one preferably textile interlayer, an outer shell of plastic material and a channel-shaped profiled molding which connects the shells

  outside and inside each other on their peripheral edge.

  that, the outer shell being movable relative to the inner shell in the peripheral junction zone of the two shells.

  Elements of protection in which the nap-

  of the textile intermediate layer are not impregnated with synthetic resin but are

  plastic shells, are known (patent DE-

  1,065,302, patent application GB-2,081,852, US-patent

  3,320,619) In these known protective elements arranged

  in the form of helmets or protective shields, the co-

  outer and inner pins of plastic material are rigidly connected to each other on the edge or in an area close to the edge, for example by conjugation of shapes by

  riveting or by conjugation of materials by welding,

  or by individual synthetic resin bridges.

  It has been found that protection elements of the type defined above tend to be damaged, especially in areas close to the edge, during stresses by impacts, for example when bouncing on hard surfaces or during an impact of fragments, even when these do not yet pass through the outer shell, but also during a bombardment, in particular by the fact that the outer shell and / or the inner shell of plastic material breaks in the zone of the peripheral edge This disadvantage can be avoided by the fact that, in the zone of the peripheral connection between the two shells, the outer shell is mobile with respect to the inner shell.

  known therefore provides in the peripheral edge zone

  that a flexible connection (not rigid) of the two shells in the form of a special profiled U-shaped molding (patent application FR 2 421 361) With such an edge connection, the degree of

  However, the relative displacement of the two hulls is very limited.

  In addition, there is the risk that the special U-shaped marginal molding is easily torn off the edge of the hulls. The object of the invention is therefore to create means which allow sufficient relative mobility.

  hulls in a peripheral marginal zone while guaranteeing

  However, a safer connection between the two hulls is still rife. This problem is solved according to the invention in that the channel shaped profiled molding, which is rigidly connected with the edge of one of the shells, preferably the inner shell, and which surrounds the edge of the other shell,

  preferably the outer shell, comprises a central rib

  trale applying internally on the edge of this shell preferably outer, the edge of the outer shell preferably which clings in the profiled molding and which has a convex, inflected or similar portion being

  surrounded by the outer wing of the profiled molding.

  2-5 The marginal connection according to the invention is

  However, it is not possible to unintentionally separate the outer shell from the inner shell. This results, on the one hand, from the influence of the curved or inflected part, hung backwards. by the outer flange of the profiled molding, the edge of the shell preferably outer and, secondly, also the influence of the central rib of the profiled molding

  in the form of a channel, by which the mobility of the shell ex-

  in the direction of the inner hull is limited and thus an exit from the outer hull out of the link

by conjugation of forms.

  For the inner shell and the outer shell

  of the protection element, it is appropriate to use

  solid and dense with a low specific gravity

  the protection element must not be too heavy.

  first place, it is therefore possible to use

  ticks (reinforced or unreinforced) as shell-making materials, especially hard plastics As hard plastics, for example, the most different types of duroplasts, and thermoplastics which are in a hard and elastic condition at the temperature of use (below

  freezing point), but also

  partially crystalline plastics, which are harder to

  For example, a polyamide having a Brinell hardness close to 100 N / m 2 and a modulus of elasticity of 2300 M / mm 2 is a particularly suitable example of a hard plastic material.

to be in one or more layers.

  The clean or at least primary element of protection against splinters or projectiles is constituted

  by the intermediate layer This is preferably composed of

  It is advantageous if the plies of textile structure consist at least in the majority of aramid or polyamide threads or fibers. By the expression "ply of textile structure" is meant all the plies of textile structure. web structures consisting of textile yarns or fibers, such as, for example, fabrics, lattices, knits, warp knits, mesh structures, nonwoven structures, or the like. Depending on the shape of the protection element, it is advantageous to

  to form the different layers of a textile web of

  Sieurs segments interconnected by seams It is advantageous that the layers of the textile web are connected

  between them by stitches or lines of seam,

or by stapling.

  Between the textile layers of the intermediate layer

  In the case of the inner shell, an insert can be provided, consisting of a compressible elastic material, which replenishes the interposed volume between

  textile webs and the hull The item reported in

  elastically compressible material may advantageously be formed of an expanded material, in particular a soft foam based on plastics material or rubber.

  elastomers or elastically deformable plastics

  The elastically compressible material insert may be formed from one or, however, also from a plurality of partial layers.

  advantageous that the insert formed of an elastic material

  compression is incorporated in a compression and preload condition. This result can best be obtained when a prefabricated

  been oversized in thickness, is

  awarded when connecting the outer shell with the inner shell or also by subsequently filling with foam, after the junction of the inner shell with the outer shell, the internal volume existing between the plies of the textile structure and the hull Sub effect of the pressure that the compressed insert exerts on the two shells, there is also a complementary safety preventing a

  separation of the marginal link according to the invention,

  especially when the insert made of an elastic material

  compressible penetrates into the area of the

between the two hulls.

  In particular, the arrangement, in particular also the sequence and the number of the plies or partial layers of the inner layer (in this respect means all the materials arranged between the inner shell and the shell

  outside), can be chosen in accordance with

imposed conditions.

  Other features and advantages of the

  will be highlighted, in the following description

  given by way of non-limiting example, with reference to the appended drawings, in which:

  Figure 1 shows a helmet in cross-section

  tical; Figure 2 shows the marginal area A of Figure 1 on an enlarged scale; and Figure 3 shows, in a similar manner to Figure 2 on an enlarged scale, the edge arrangement in the

visor area of the helmet.

  The helmet represented consists of an outer shell

  plastic material, for example polycarbonate

  nate, a few (for example 4) layers of aramid fabric 2 and an inner shell 3 also made of hard plastic, for example polycarbonate Between the aramid fabric 2 and the inner shell 3 of plastic material, it is

  provided an insert 4 in elastically compressible material

  for example polyurethane foam The various layers of the aramid fabric 2 are placed loosely on one another and are not connected to each other

  between them only locally, for example by seams.

  In a peripheral marginal zone, the inner shell 3 made of plastic material has a profile 5 in the form of a channel, which is open towards the peripheral edges of the other layers 1, 2, 4 of the helmet The outer shell 4 of plastic material penetrates by its edge free device 6 in the profile 5 in the form of channel, the thickened edge 6 of the shell 1 of plastic material clinging behind the wing 7, bent inwards, profile 5 in the form of a channel The wing 7 is bent inwards,

  from the position shown in phantom, for example

  by heating with hot air, which establishes a bending connection The wing 7 has an inclined outer side,

  that is to say, it gradually joins the outer surface

  of the outer shell 3, so that one avoids in

  a large extent a non-invasive deflection or

  of the wing 7 The mobility of the free edge 6 of the outer shell 1 made of plastic in the direction of the

  inner shell 3 is bounded by rib 8 to prevent

  that the free edge 6 protrudes upwardly out of the channel-shaped profile 5 and that the outer shell 1 can lift from the rest of the layers of the helmet. The movable marginal connection shown also allows a torsional movement of the outer shell 1 by relative to the inner shell 3 around the vertical axis 9 (FIG. 1) of the helmet, this movement being however limited as a result of the shape of the helmet which

  classically has no symmetry of revolution

  port to the axis 9 The mobility of the outer shell 1 by

  wearing to the inner shell 3 is favored by the element

  reported 4 elastically deformable.

  The elasticity of the material used for

  1, 3, including the profiled molding 5 in the form of channel, allows to arrange the marginal connection described in the form of a connection by curling also in the form of a connection by interlocking with an outer wing 7 pre-profiled by fold

or by bending.

  Between the wing 7 of the profile 5 and the outer shell

  1, it is also possible to have a seal 10 made of

  elastomer, for example of silicone elastomer material

  not impeding the desired mobility of the market link.

  The seal 10 can be glued on both the wing 7 and the outer shell 1 or it can

  simply be fitted between the wing 7 and the cock Ue 1.

  In most cases, helmets comprise a visor. FIG. 3 shows the edge arrangement of a helmet according to FIGS. 1 and 2 in this zone.

  visor, the numerical references having the same

than in Figure 2.

  In the embodiment shown, the

  profiled molding 5 in the form of a channel forms a mono-

  block with the inner shell 3 of plastic material Although this corresponds to the most advantageous structure, it is also possible to use a special profiled marginal molding in

  channel shape with one wing glued to the inner hull

  This special profiled molding may for example be formed of an elastic and easily deformable material,

  for example a thermoplastic material with a low modulus of

  elasticity, in particular of polyethylene, or else of an elastomeric material, in which is, where appropriate, embedded

spring steel wire.

  As fields of application of the invention, mention may be made, apart from helmets, for example coatings

  of motor vehicles, protective shields

  portable or similar objects.

Claims (1)

1 intrinsically rigid protection element, formed of several layers, stopping projectiles and / or chips, preferably for the protection of the human body or parts thereof, including a helmet, having an inner shell of plastic material, at least one preferably textile interlayer, an outer shell of plastics material and a profiled channel-like molding which connects the outer and inner shells together on their peripheral edge, the outer shell being movable relative to the inner shell in the peripheral junction zone of the two shells, characterized in that the channel-shaped profiled molding (5), which is rigidly connected to the edge of one of the shells, preferably the inner shell (3), and which surrounds the rim the other shell, preferably the outer shell (1), has a rib (8) applied internally to the edge of this shell, the outermost shell (1), the edge (6) of the preferably outer shell (1), which hooks into the profiled molding (5) and which has a curved, inflected or similar part, being surrounded by the outer wing (7) of the profiled molding (5). Protective element according to claim 1, characterized in that the channel-shaped profiled molding (5) forms a one-piece assembly with a shell, preferably the inner shell (3). Protective element according to claim 1 or 2, characterized in that the edge of the outer shell (1) is preferably crimped by the outer flange (7) of the profiled molding (5), made of preferably thermoplastic material. Protective element according to claim 1 or 2, characterized in that the edge of the preferably outer shell (1) is embossed in the stripped groove formed between the central rib (8) and the outer wing ( 7). Protective element according to one of Claims 1 to 4, characterized in that an elastomer seal (10) is arranged between the outer flange (7) of the channel-shaped profiled molding (5) and the edge (6) of the outer shell (1) preferably. Protective element according to one of claims 1 to 5, characterized in that the outer flange (7) of the profiled molding (5) joins obliquely by its outer side the outer surface of the outer shell. Protective element according to one of the claims   1 to 6, characterized in that the intermediate layer disposed between the shells (1,3) contains at least one insert (4) of elastically compressible material, preferably of foam, which penetrates into the peripheral bond zone two hulls (1,3).