EP1894483B1 - Manufacturing method for a protective helmet - Google Patents

Manufacturing method for a protective helmet Download PDF

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Publication number
EP1894483B1
EP1894483B1 EP07014881A EP07014881A EP1894483B1 EP 1894483 B1 EP1894483 B1 EP 1894483B1 EP 07014881 A EP07014881 A EP 07014881A EP 07014881 A EP07014881 A EP 07014881A EP 1894483 B1 EP1894483 B1 EP 1894483B1
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EP
European Patent Office
Prior art keywords
shell
yoke
helmet
panel
cap
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07014881A
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German (de)
French (fr)
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EP1894483A1 (en
Inventor
Hervé Favre-Felix
Patrick Leick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Salomon SAS
Original Assignee
Salomon SAS
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Filing date
Publication date
Application filed by Salomon SAS filed Critical Salomon SAS
Publication of EP1894483A1 publication Critical patent/EP1894483A1/en
Application granted granted Critical
Publication of EP1894483B1 publication Critical patent/EP1894483B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/003—Helmet covers

Definitions

  • the invention relates to a method of manufacturing a protective helmet.
  • helmets For recreational sports such as skating, ice skating, biking, skiing, etc., it is becoming more common to wear a hard hat.
  • These helmets generally comprise an outer shell made of a thin and rigid material, for example polycarbonate or ABS, and inside a damping cap for example made of polystyrene.
  • These helmets are further equipped with a chinstrap and optionally an auxiliary restraint that passes on the back of the neck of the user.
  • a chinstrap and optionally an auxiliary restraint that passes on the back of the neck of the user.
  • Most often they also have elements of comfort such as foam cushions, a textile trim, sometimes called a cap, on the inside of the cap or other.
  • vents at the outer shell and the cap which form air ducts.
  • the shell and the cap are manufactured separately and subsequently assembled, for example, using glue, or any other appropriate means.
  • the shell is made and then placed in a mold to inject a material which will form the cap after expansion and hardening.
  • the outer shell of the helmet is formed by the thin shell.
  • the shell is constituted by a very thin sheet of a PVC type material whose thickness is such that when bare, this shell has the rigidity necessary to provide the protection expected by the helmet final.
  • the cap is made of expanded polystyrene or an equivalent material. Since the assembly of the cap and the shell is done directly in the mold, during the polystyrene expansion phase, this helmet manufacturing technology is called "in-mold" technology.
  • Helmets are a protective accessory that does not directly affect the performance of the user in his sport practice. Also to make the helmet more attractive during its purchase and its use manufacturers have sought to improve its aesthetics.
  • a first way was to work the shape of the outer shell of the helmet and its vents. Another way has been to add accessories, for example a visor.
  • Another way has been to decorate the outer shell, for example by means of stickers, transfers, by a screen printing technique or by painting to directly print a pattern on the shell.
  • these devices can hardly be set up for helmets obtained by in-mold technology because the sheet of material which will constitute the outer skin of the helmet, that is to say the shell, is relatively fragile when not supported by the cap.
  • the document EP 1 038 455 discloses a helmet decoration process in which a layer of leather is disposed on the shell.
  • the object of the invention is achieved by providing a method according to claims 1 to 10 and a helmet obtained by such a method.
  • the seam line is visible from the outside.
  • the yoke comprises several widths and a seam line at the junction of two widths binds the yoke to the shell.
  • the widths have a different texture and / or color.
  • the yoke may also be attached to the shell by additional assembly means such as a strip of glue.
  • the shell may have openings to form vents, in which case the yoke has cuts coincident with said openings.
  • the flexible material may be a textile fabric, a leather band or any other flexible material.
  • the protective helmet comprises an outer shell and a damping cap disposed inside the shell, the assembly defining a plane of symmetry, the shell being formed by a thin shell.
  • the shell is covered at least locally by a yoke made of a flexible material, the yoke is stretched against the shell and is attached to the shell by at least one seam line along one of its edges.
  • the outer shell is produced, a yoke made of flexible material is prepared, the outer shell is bonded to the said yoke by means of at least one sewing line along one edge of the yoke, and then fill the inside of the shell with the cap.
  • the figure 1 shows the general construction of a helmet to which the invention applies.
  • the figure 2 represents in view of behind a helmet according to a first embodiment of the invention.
  • the figure 3 shows the helmet of the figure 2 seen from the side.
  • the figure 4 is a rear view of a helmet according to another embodiment of the invention.
  • the figure 5 represents the helmet of the figure 4 seen from the side.
  • the Figures 10 to 14 illustrate different ways of assembling the widths of a yoke.
  • the Figures 15 to 18 show different modes of mounting the yoke at an opening of the shell.
  • the Figures 19 to 21 show different modes of mounting the yoke along an edge of the shell.
  • the figure 22 illustrates a phase of the manufacturing process of the invention.
  • the figure 23 relates to an alternative embodiment of the method.
  • the figure 1 represents a helmet 10 which comprises an outer shell 11 and an inner cap 12.
  • the outer shell is formed by a shell made of a plastic material, and has a thin thickness of less than 1.5 millimeters. In particular, it can be obtained from a flat sheet of polycarbonate or PVC having a thickness of between 0.7 and 1.5 millimeters which has been cut and shaped by a thermoforming technique.
  • the shell optionally has openings, such as the openings 14, 15, 16, and other openings where appropriate, as well as recessed or raised areas, possibly with edges of rupture of shape, in correspondence or not with the openings.
  • the inner cap 12 forms a cushioning layer which is provided to envelop and protect the user's head. It is for example made of expanded polystyrene. It is intended to internally fill the shell 11.
  • the outer wall of the cap conforms to the inner shape of the shell. Preferably, it has openings coinciding with the openings of the shell so as to form overall vents to facilitate the circulation of air under the cap.
  • the shell and the cap have the shape of a symmetrical sphere portion relative to a median vertical plane that defines two hemispheres. This plan is parallel to the plan of figures 3 and 5 .
  • the term "longitudinal” designate a direction parallel to this plane and “transverse” designate a perpendicular direction, that is to say that passes from one hemisphere to another.
  • the cap is made and assembled to the hull by any appropriate means.
  • the shell and the cap are made separately and then assembled to each other for example by means of a glue or a single-sided or double-sided adhesive tape, or any other technical.
  • the shell already cut and shaped is placed in a mold, then the material is injected into the mold so as to form the cap.
  • the material is injected into the mold so as to form the cap.
  • polystyrene balls and water vapor under pressure are injected into the mold in such a way as to cause the polystyrene to expand and to form the cap directly against the shell.
  • the helmet further comprises a retaining device on the user's head and, where appropriate, comfort elements.
  • these means comprise a chinstrap formed with portions of strap connected to the cap which are intended to be hooked together under the chin of the user.
  • the Figures 2 and 3 represent a helmet according to a first embodiment of the invention.
  • This helmet has a shell 21 and a cap 22.
  • the shell 21 is dressed externally by a yoke 23 which covers the rear part and the lower part of the shell 21.
  • the openings 25, 26 which are in this area are disengaged.
  • the yoke 23 is made here in two widths 23a, 23b which are assembled together so that the yoke follows the curvature of the hull in the covered area. The assembly means will be described later.
  • the yoke is made of a flexible material such as a skin, a film or a fabric based on natural or synthetic fibers.
  • the material can be colored, embroidered or patterned. It can also be printed, screen printed or painted.
  • the patterns of the yoke can be coordinated with the decoration of the hull.
  • the widths can be of the same nature or of different nature in terms of texture or color.
  • the material has an extensible character so that it matches the rounded shape of the shell without wrinkling.
  • the material is leather, or a leatherette which has the advantage of being flexible and compressible in the direction of the thickness, which gives a volume effect. Such material contrasts well with the appearance of the hull itself.
  • Other materials are also suitable as a textile fabric, especially a jean cloth.
  • the yoke could cover the entire hull, or it could include more or less two widths. On the other hand, it could be expected that there are several inserts placed at different locations on the hull.
  • FIGS. 4 and 5 show a helmet 30 according to another embodiment of the invention.
  • the shell 31 of the helmet is dressed with a yoke 33 which covers the upper part of the hull, leaving unobstructed the front part and the rear part.
  • the yoke is here formed of five widths whose widths 33a, 33b, 33c, 33d which are visible in the figures. As previously the widths are assembled so that the yoke matches the rounded shape of the shell without forming folds. The yoke is cut at the vents of the helmet so as not to impede the flow of air between the outside and the inside.
  • the material of the yoke is the same as that described for the previous helmet. As in the previous case, the yoke can cover the cap in a different way, and present a number of more or less important widths.
  • a yoke comprises two transverse edges that extend from one hemisphere to the other of the shell, and connecting edges between these transverse edges.
  • the yoke is assembled to the shell by at least one seam which is made along an edge.
  • the edge in question is a transverse edge of the yoke. This edge is sewn to the hull in full surface or along one of its own edges.
  • the yoke can be sewn or glued to the shell, or the edge of the yoke can be folded on itself and sewn and then glued to the shell like this will be described later.
  • seams can also be made between the different widths of a yoke, by binding or without binding the shell and the yoke in this area.
  • the seams can be made simply, for example using a conventional sewing machine such as those used in the field of footwear.
  • a material such as polycarbonate or ABS easily withstands a needle and is well suited for sewing.
  • the seams ensure a close fit of the yoke on the shell, they maintain a durable tension in the yoke that prevents the formation of creases.
  • the seams guarantee an assembly that resists external aggression, including impacts or tears.
  • the seams form lines on the surface of the shell and they print in the yoke a relief imprint that highlight its texture and contribute to make the aesthetics of the helmet more attractive.
  • the yoke is irremovable, that is to say it can not be disassembled without deterioration, except where appropriate by an experienced person.
  • the helmet There may be areas of the helmet where the wall of the shell forms a hollow. In these areas, the yoke tends to depart naturally from the hull wall. These areas can be glued prior to the application of the yoke on the shell and exert a support on the yoke so that it stretches locally and matches the shape of the shell in these areas of hollow.
  • FIGS 6 to 21 illustrate different ways of mounting the connection between the yoke and the hull. They illustrate more particularly the mounting of the yoke 23 on the hull 21 of the first embodiment. To facilitate the understanding of the invention the references of Figures 2 and 3 will be included in these Figures 6 to 21 to designate the shell and the different widths of the yoke.
  • the Figures 6 to 9 illustrate different modes of mounting the yoke in full surface of the hull.
  • the upper transverse edge of the width 23b forms a hem whose flap is sewn to the shell 22 by a seam line 40.
  • the seam line is not visible in this case.
  • the edge of the width 23b forms a hem and the whole is sewn by a seam line 41.
  • the flap of the hem is sewn to the shell 22 by a first seam line 43, then the whole is sewn to the shell by a second line 44.
  • a hem is sewn by a seam line 45 and then the whole is glued to the shell by means of a glue strip 46.
  • the seam is visible, but it does not bind the yoke to the shell.
  • FIGS 10 to 14 illustrate the junction between the two widths 23a and 23b. According to figure 10 , the two widths are sewn edge to edge by a seam line 48 which is placed with the flaps on the side of the shell.
  • the figure 12 shows the same type of assembly, but the sewing line 50 also binds the shell.
  • both sides are sewn edge to edge by a seam line 52, then each flap is sewn by a line 53, 54.
  • the two widths are sewn edge by edge by a line 55 and each edge of width is sewn to the shell by a seam line 56, 57 visible from the outside.
  • the Figures 15 to 18 illustrate the mounting of the width 23a at the opening 26 of a vent.
  • the width is cut and the edges of the cut are folded through the opening 26, inside the shell. They are sewn by a seam 60.
  • the edges of the cut are passed through the cut, they are glued inside the shell by a band of glue 61.
  • the yoke is cut to the razor of the opening 26 and its edges are glued by an adhesive strip 63.
  • FIGS. 19 to 22 illustrate the mounting of an edge of the yoke along an edge of the shell 22.
  • the rim of the yoke 23 is folded and glued inside the shell 22 by an adhesive strip 64.
  • the edge is sewn by a seam line 65 which passes through the assembly and which is visible from the outside.
  • the flap of the yoke 23 is folded between the yoke and the shell, and the assembly is sewn by a seam line 66.
  • the yoke is then integrated completely into the structure of the helmet in terms of aesthetics.
  • the mounting mode is chosen according to the material used to make the yoke, the shape of the widths and also the desired aesthetic effect. Other mounting modes may also be suitable.
  • the shell of the helmet and the yoke is first made, these two elements are assembled, then the shell is filled with the cap according to one of the techniques mentioned above.
  • the figure 22 illustrates this step of the process.
  • a bare shell 68 On one side is prepared a bare shell 68.
  • the shell is cut and shaped by any appropriate technique, including thermoforming. It has its final shape, with the possible openings for vents and break edges for recessed or raised areas.
  • the yoke 69 On the other hand is prepared the yoke 69, with the appropriate if its different widths joined together.
  • the openings for the vents can be made before or after assembly of the yoke on the shell.
  • the yoke is then assembled to the shell along its different edges. Sewing is performed on at least one edge of the yoke. On the other edges, a seaming or gluing technique is used as described with reference to the preceding figures. At the level of openings it's the same thing.
  • the cap is made apart and is assembled inside the shell by glue or adhesive, or any other appropriate hub.
  • the shell is placed in an injection mold and material is injected into the mold to form the cap.
  • material is injected into the mold to form the cap.
  • the wall of the shell is pressed against the mold cavity, including in areas that are dressed by the yoke.
  • the assembly of the yoke can be provided to glue these areas to enhance the adhesion with the shell.
  • the injection can be used the same press and the same mold for helmets whose shell is dressed and helmets whose shell is bare. Indeed, the presence of the yoke does not change the establishment of the hull in the mold significantly.
  • the first filling technique it can be provided to carry out these operations in a recovery press where the dressed shell of the yoke is compressed and optionally heated.
  • the cap When the cap is put in place by injection inside the hull it traps all the flaps that are folded inside the hull, including in areas where the flaps were not linked to the hull.
  • the figure 23 illustrates another embodiment of the invention.
  • the yoke 70 is prepared, then it is assembled on the sheet 71 of thermoformable material from which the shell is made, for example with the aid of two seam lines 72 and 73 along each edge. cross section of the yoke.
  • the other edges are glued, or they are intended to be folded inside the shell after shaping.
  • the sheet coated yoke is shaped and then cut to form the shell dressed.
  • the heat necessary for the shaping of the sheet may be used for example to melt a film of glue between the yoke and the shell which enhances the adhesion between the shell and the yoke.
  • the helmet may be equipped with a retainer and comfort elements.
  • the yoke could be made in two independent parts, or more.

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  • Helmets And Other Head Coverings (AREA)

Abstract

The safety helmet (10), for sports activities, has an outer shell (11) and a thin inner padded hood (12). The shell is covered at least locally by a flexible fabric cover, bonded to the shell along its edges by a seamed line. The shell is fitted with ventilation openings (14-16).

Description

L'invention concerne un procédé de fabrication d'un casque de protection.The invention relates to a method of manufacturing a protective helmet.

Pour la pratique de sports de loisir comme le patin en ligne, le patin à glace, le vélo, le ski, ou autre, il est de plus en plus courant de porter un casque de protection. Ces casques comprennent en règle générale une coque externe réalisée dans un matériau peu épais et rigide, par exemple en polycarbonate ou en ABS, et à l'intérieur une calotte amortissante par exemple réalisée en polystyrène. Ces casques sont équipés en outre d'une jugulaire et le cas échéant un dispositif de retenue auxiliaire qui passe sur l'arrière de la nuque de l'utilisateur. Le plus souvent ils ont aussi des éléments de confort comme des coussins de mousse, une garniture textile, appelée parfois coiffe, sur l'intérieur de la calotte ou autre.For recreational sports such as skating, ice skating, biking, skiing, etc., it is becoming more common to wear a hard hat. These helmets generally comprise an outer shell made of a thin and rigid material, for example polycarbonate or ABS, and inside a damping cap for example made of polystyrene. These helmets are further equipped with a chinstrap and optionally an auxiliary restraint that passes on the back of the neck of the user. Most often they also have elements of comfort such as foam cushions, a textile trim, sometimes called a cap, on the inside of the cap or other.

Pour rendre le port du casque plus agréable il est également prévu des évents au niveau de la coque externe et de la calotte qui forment des conduits d'aération.To make the wearing of the helmet more pleasant there are also provided vents at the outer shell and the cap which form air ducts.

Deux techniques principales sont utilisées pour réaliser de tels casques. Selon une première technique on fabrique séparément la coque et la calotte qu'on assemble ensuite par exemple à l'aide de colle, ou tout autre moyen approprié.Two main techniques are used to make such helmets. According to a first technique, the shell and the cap are manufactured separately and subsequently assembled, for example, using glue, or any other appropriate means.

Selon une autre technique, on réalise la coque que l'on place ensuite dans un moule pour injecter un matériau qui formera la calotte après expansion et durcissement.According to another technique, the shell is made and then placed in a mold to inject a material which will form the cap after expansion and hardening.

Dans les deux cas, l'enveloppe externe du casque est formée par la coque à fine épaisseur.In both cases, the outer shell of the helmet is formed by the thin shell.

Dans le deuxième cas, la coque est constituée par une très fine feuille d'un matériau de type PVC dont l'épaisseur est telle que lorsqu'elle est nue, cette coque n'a la rigidité nécessaire pour assurer la protection attendue par le casque final. Généralement, la calotte est réalisée en polystyrène expansé ou dans un matériau équivalent. Etant donné que l'assemblage de la calotte et de la coque se fait directement dans le moule, au cours de la phase d'expansion du polystyrène, on appelle cette technologie de fabrication de casque, la technologie "in-mold".In the second case, the shell is constituted by a very thin sheet of a PVC type material whose thickness is such that when bare, this shell has the rigidity necessary to provide the protection expected by the helmet final. Generally, the cap is made of expanded polystyrene or an equivalent material. Since the assembly of the cap and the shell is done directly in the mold, during the polystyrene expansion phase, this helmet manufacturing technology is called "in-mold" technology.

Les casques sont un accessoire de protection qui n'entre pas directement dans les performances de l'utilisateur dans sa pratique du sport. Aussi pour rendre le casque plus attrayant lors de son achat et de son utilisation les fabricants ont recherché à améliorer son esthétique. Une première voie a été de travailler la forme de la coque externe du casque et de ses évents. Une autre voie a été d'ajouter des accessoires, par exemple une visière. Une autre voie a été de décorer la coque externe, par exemple à l'aide d'autocollants, de transferts, par une technique de sérigraphie ou par peinture pour directement imprimer un motif sur la coque.Helmets are a protective accessory that does not directly affect the performance of the user in his sport practice. Also to make the helmet more attractive during its purchase and its use manufacturers have sought to improve its aesthetics. A first way was to work the shape of the outer shell of the helmet and its vents. Another way has been to add accessories, for example a visor. Another way has been to decorate the outer shell, for example by means of stickers, transfers, by a screen printing technique or by painting to directly print a pattern on the shell.

Une autre voie a été d'ajouter une enveloppe en matière souple pour modifier l'aspect externe de la coque. Les demandes de brevet FR2680305 , EP1256285 et 1358810 décrivent de tels dispositifs.Another way has been to add a flexible material envelope to modify the external appearance of the hull. Requests for FR2680305 , EP1256285 and 1358810 describe such devices.

Ces dispositifs ont en commun le fait d'être amovibles et le cas échéant interchangeables. En contrepartie l'effet esthétique qu'ils produisent n'est pas totalement satisfaisant car les systèmes d'attache ne permettent pas de tendre l'enveloppe sur toute la surface couverte sans avoir de plis.These devices have in common the fact of being removable and where appropriate interchangeable. In return the aesthetic effect they produce is not completely satisfactory because the fastening systems do not allow to stretch the envelope over the entire covered area without having folds.

D'autre part, ces dispositifs peuvent difficilement être mis en place pour des casques obtenus par la technologie "in-mold" car la feuille de matière qui constituera la peau extérieure du casque, c'est-à-dire la coque, est relativement fragile lorsqu'elle n'est pas supportée par la calotte.On the other hand, these devices can hardly be set up for helmets obtained by in-mold technology because the sheet of material which will constitute the outer skin of the helmet, that is to say the shell, is relatively fragile when not supported by the cap.

Le document EP 1 038 455 décrit un procédé de décoration pour casque dans lequel une couche de cuir est disposée sur la coque.The document EP 1 038 455 discloses a helmet decoration process in which a layer of leather is disposed on the shell.

Compte tenu de cet état de la technique, il existe un besoin pour un casque et son procédé de fabrication qui soient améliorés en ce que l'habillage dont la coque est revêtue présente un meilleur aspect, et notamment en ce qu'il ne présente pas de plis.Given this state of the art, there is a need for a helmet and its manufacturing process that are improved in that the cladding with which the shell is coated has a better appearance, and in particular in that it does not present folds.

Ce but et d'autres buts qui apparaîtront dans la description qui va suivre sont atteints par le procédé de décoration selon l'invention et par le casque obtenu par la mise en oeuvre du procédé.This object and other objects which will appear in the description which follows are achieved by the decoration method according to the invention and by the helmet obtained by the implementation of the method.

Notamment, le but de l'invention est atteint par fourniture d'un procédé selon les revendications 1 à 10 ainsi que d'un casque obtenu par un tel procédé.In particular, the object of the invention is achieved by providing a method according to claims 1 to 10 and a helmet obtained by such a method.

Le but de l'invention est notamment obtenu par la mise en oeuvre du procédé de fabrication d'un casque ayant une coque externe de fine épaisseur et une calotte interne amortissante et qui comprend les étapes suivantes :

  • réalisation de la coque externe,
  • préparation d'un empiècement en matière souple,
  • liaison de la coque externe avec le dit empiècement au moyen d'au moins une ligne couture, et,
  • injection de la calotte à l'intérieur de la coque déjà habillée par l'empiècement.
The object of the invention is in particular obtained by implementing the method of manufacturing a helmet having a thin outer shell and a damping inner cap and which comprises the following steps:
  • realization of the outer shell,
  • preparation of a yoke made of flexible material,
  • binding the outer shell with said yoke by means of at least one seam line, and
  • injection of the cap inside the hull already dressed by the yoke.

De préférence, la ligne de couture est visible de l'extérieur.Preferably, the seam line is visible from the outside.

Dans un mode de réalisation préféré de l'invention, l'empiècement comprend plusieurs laizes et une ligne de couture à la jonction de deux laizes lie l'empiècement à la coque. Eventuellement, les laizes ont une texture et/ou un coloris différents.In a preferred embodiment of the invention, the yoke comprises several widths and a seam line at the junction of two widths binds the yoke to the shell. Optionally, the widths have a different texture and / or color.

L'empiècement pourra aussi être fixé à la coque par des moyens d'assemblage supplémentaire comme par exemple une bande de colle.The yoke may also be attached to the shell by additional assembly means such as a strip of glue.

La coque peut présenter des ouvertures pour former des évents d'aération, auquel cas l'empiècement a des découpes en coïncidence avec les dites ouvertures.The shell may have openings to form vents, in which case the yoke has cuts coincident with said openings.

La matière souple peut être un tissu textile, une bande de cuir ou de tout autre matériau souple.The flexible material may be a textile fabric, a leather band or any other flexible material.

Le casque de protection comprend une coque externe et une calotte amortissante disposée à l'intérieur de la coque, l'ensemble définissant un plan de symétrie, la coque étant formée par une coquille de fine épaisseur. La coque est couverte au moins localement par un empiècement en une matière souple, l'empiècement est tendu contre la coque et il est lié à la coque par au moins une ligne de couture le long d'un de ses bords.The protective helmet comprises an outer shell and a damping cap disposed inside the shell, the assembly defining a plane of symmetry, the shell being formed by a thin shell. The shell is covered at least locally by a yoke made of a flexible material, the yoke is stretched against the shell and is attached to the shell by at least one seam line along one of its edges.

Selon le procédé de fabrication on réalise la coque externe, on prépare un empiècement en matière souple, on lie la coque externe avec le dit empiècement au moyen d'au moins une ligne de couture le long d'un bord de l'empiècement, et ensuite on garnit l'intérieur de la coque avec la calotte.According to the manufacturing method, the outer shell is produced, a yoke made of flexible material is prepared, the outer shell is bonded to the said yoke by means of at least one sewing line along one edge of the yoke, and then fill the inside of the shell with the cap.

L'invention sera mieux comprise en se référant à la description ci-dessous et aux dessins en annexe qui lui sont attachés.The invention will be better understood by referring to the description below and attached drawings attached thereto.

La figure 1 montre la construction générale d'un casque auquel s'applique l'invention.The figure 1 shows the general construction of a helmet to which the invention applies.

La figure 2 représente en vue de derrière un casque selon un premier mode de mise en oeuvre de l'invention.The figure 2 represents in view of behind a helmet according to a first embodiment of the invention.

La figure 3 montre le casque de la figure 2 vu de côté.The figure 3 shows the helmet of the figure 2 seen from the side.

La figure 4 est une vue de derrière d'un casque selon un autre mode de mise en oeuvre de l'invention.The figure 4 is a rear view of a helmet according to another embodiment of the invention.

La figure 5 représente le casque de la figure 4 vu de côté.The figure 5 represents the helmet of the figure 4 seen from the side.

Les figures 6 à 9 illustrent de façon schématique différents modes de montage de l'empiècement en pleine surface sur la coque.The Figures 6 to 9 schematically illustrate different modes of mounting the full-surface yoke on the hull.

Les figures 10 à 14 illustrent différents modes d'assemblage des laizes d'un empiècement.The Figures 10 to 14 illustrate different ways of assembling the widths of a yoke.

Les figures 15 à 18 montrent différents modes de montage de l'empiècement au niveau d'une ouverture de la coque.The Figures 15 to 18 show different modes of mounting the yoke at an opening of the shell.

Les figures 19 à 21 montrent différentes modes de montage de l'empiècement le long d'un bord de la coque.The Figures 19 to 21 show different modes of mounting the yoke along an edge of the shell.

La figure 22 illustre une phase du procédé de fabrication de l'invention.The figure 22 illustrates a phase of the manufacturing process of the invention.

La figure 23 est relative à une variante de mise en oeuvre du procédé.The figure 23 relates to an alternative embodiment of the method.

La figure 1 représente un casque 10 qui comprend une coque externe 11 et une calotte interne 12.The figure 1 represents a helmet 10 which comprises an outer shell 11 and an inner cap 12.

La coque externe est formée par une coquille réalisée dans une matière plastique, et elle présente une fine épaisseur inférieure à 1,5 millimètre. Notamment, elle peut être obtenue à partir d'une feuille plane en polycarbonate ou en PVC ayant une épaisseur comprise entre 0,7 et 1,5 millimètre qui a été découpée et mise en forme par une technique de thermoformage. La coque présente éventuellement des ouvertures, comme les ouvertures 14, 15, 16, et d'autres ouvertures le cas échéant, ainsi que des zones en creux ou en relief, éventuellement avec des arêtes de rupture de forme, en correspondance ou non avec les ouvertures.The outer shell is formed by a shell made of a plastic material, and has a thin thickness of less than 1.5 millimeters. In particular, it can be obtained from a flat sheet of polycarbonate or PVC having a thickness of between 0.7 and 1.5 millimeters which has been cut and shaped by a thermoforming technique. The shell optionally has openings, such as the openings 14, 15, 16, and other openings where appropriate, as well as recessed or raised areas, possibly with edges of rupture of shape, in correspondence or not with the openings.

La calotte 12 intérieure forme une couche amortissante qui est prévue pour envelopper et protéger la tête de l'utilisateur. Elle est par exemple réalisée en polystyrène expansé. Elle est prévue pour garnir intérieurement la coque 11. La paroi externe de la calotte épouse la forme intérieure de la coque. De préférence, elle présente des ouvertures en coïncidence avec les ouvertures de la coque de façon à former globalement des évents pour faciliter la circulation d'air sous la calotte.The inner cap 12 forms a cushioning layer which is provided to envelop and protect the user's head. It is for example made of expanded polystyrene. It is intended to internally fill the shell 11. The outer wall of the cap conforms to the inner shape of the shell. Preferably, it has openings coinciding with the openings of the shell so as to form overall vents to facilitate the circulation of air under the cap.

Globalement la coque et la calotte ont la forme d'une portion de sphère symétrique relativement à un plan vertical médian qui définit deux hémisphères. Ce plan est parallèle au plan des figures 3 et 5. Dans la suite, le terme "longitudinal" désignera une direction parallèle à ce plan et "transversal" désignera une direction perpendiculaire, c'est à dire qui passe d'un hémisphère à l'autre.Overall, the shell and the cap have the shape of a symmetrical sphere portion relative to a median vertical plane that defines two hemispheres. This plan is parallel to the plan of figures 3 and 5 . In the following, the term "longitudinal" designate a direction parallel to this plane and "transverse" designate a perpendicular direction, that is to say that passes from one hemisphere to another.

La symétrie de la coque et de la calotte relativement au plan médian permet de produire des casques dont la partie gauche est identique, quoique inversée, à la partie droite. Il ne s'agit, bien entendu, pas d'une caractéristique limitative de l'invention et on pourra envisager des casques selon l'invention qui ne présentent pas de symétrie droite-gauche.The symmetry of the shell and the cap relative to the median plane makes it possible to produce helmets whose left part is identical, although inverted, to the right part. This is, of course, not a limiting feature of the invention and we can consider helmets according to the invention that do not have right-left symmetry.

La calotte est réalisée et assemblée à la coque selon tout moyen approprié. Selon une première technique connue, la coque et la calotte sont réalisées de façon séparée puis assemblées l'une à l'autre par exemple à l'aide d'une colle ou d'un ruban adhésif simple face ou double face, ou toute autre technique.The cap is made and assembled to the hull by any appropriate means. According to a first known technique, the shell and the cap are made separately and then assembled to each other for example by means of a glue or a single-sided or double-sided adhesive tape, or any other technical.

Selon une autre technique connue, la coque déjà découpée et mise en forme est placée dans un moule, puis de la matière est injectée dans le moule de façon à former la calotte. Par exemple on injecte dans le moule des billes de polystyrène et de la vapeur d'eau sous pression de façon à provoquer l'expansion du polystyrène et à former la calotte directement contre la coque.According to another known technique, the shell already cut and shaped is placed in a mold, then the material is injected into the mold so as to form the cap. For example, polystyrene balls and water vapor under pressure are injected into the mold in such a way as to cause the polystyrene to expand and to form the cap directly against the shell.

D'autres techniques de fabrication peuvent aussi convenir.Other manufacturing techniques may also be suitable.

Le casque comprend par ailleurs un dispositif de retenue sur la tête de l'utilisateur et le cas échéant des éléments de confort. Par exemple ces moyens comprennent une jugulaire formée avec des portions de sangle reliées à la calotte qui sont prévues pour être accrochées ensemble sous le menton de l'utilisateur. Il peut y avoir aussi un système de retenue occipital associé ou non à la jugulaire, ainsi que des patins ou garnitures en mousse ou autre matériau d'hygiène ou de confort. Ces dispositifs sont connus et n'ont pas été représentés dans les figures.The helmet further comprises a retaining device on the user's head and, where appropriate, comfort elements. For example, these means comprise a chinstrap formed with portions of strap connected to the cap which are intended to be hooked together under the chin of the user. he there may also be an occipital restraint system associated or not with the jugular, as well as pads or pads made of foam or other material of hygiene or comfort. These devices are known and have not been shown in the figures.

Les figures 2 et 3 représentent un casque selon un premier mode de mise en oeuvre de l'invention. Ce casque présente une coque 21 et une calotte 22. La coque 21 est habillée extérieurement par un empiècement 23 qui couvre la partie arrière et la partie basse de la coque 21. Cependant les ouvertures 25, 26 qui se trouvent dans cette zone sont dégagées. L'empiècement 23 est réalisé ici selon deux laizes 23a, 23b qui sont assemblées entre elles de façon à ce que l'empiècement suive la courbure de la coque dans la zone couverte. Les moyens d'assemblage seront décrits ultérieurement.The Figures 2 and 3 represent a helmet according to a first embodiment of the invention. This helmet has a shell 21 and a cap 22. The shell 21 is dressed externally by a yoke 23 which covers the rear part and the lower part of the shell 21. However, the openings 25, 26 which are in this area are disengaged. The yoke 23 is made here in two widths 23a, 23b which are assembled together so that the yoke follows the curvature of the hull in the covered area. The assembly means will be described later.

L'empiècement est réalisé dans une matière souple comme une peau, un film ou un tissu à base de fibres naturelles ou synthétiques. La matière peut être colorée, brodée ou porter des motifs. Elle peut aussi être imprimée, sérigraphiée ou peinte. Les motifs de l'empiècement peuvent être coordonnés avec la décoration de la coque. Les laizes peuvent être de même nature ou de nature différente sur le plan de la texture ou du coloris. De préférence, la matière présente un caractère extensible de façon à ce qu'elle épouse la forme arrondie de la coque sans faire de plis. Par exemple la matière est du cuir, ou un similicuir qui présente l'avantage d'être souple et compressible dans le sens de l'épaisseur, ce qui donne un effet de volume. Une telle matière contraste bien avec l'apparence de la coque elle même. D'autres matières conviennent aussi comme une toile textile, notamment une toile à jean.The yoke is made of a flexible material such as a skin, a film or a fabric based on natural or synthetic fibers. The material can be colored, embroidered or patterned. It can also be printed, screen printed or painted. The patterns of the yoke can be coordinated with the decoration of the hull. The widths can be of the same nature or of different nature in terms of texture or color. Preferably, the material has an extensible character so that it matches the rounded shape of the shell without wrinkling. For example the material is leather, or a leatherette which has the advantage of being flexible and compressible in the direction of the thickness, which gives a volume effect. Such material contrasts well with the appearance of the hull itself. Other materials are also suitable as a textile fabric, especially a jean cloth.

D'autres modes de construction conviennent également. Notamment l'empiècement pourrait couvrir toute la coque, ou encore il pourrait comprendre plus ou moins de deux laizes. D'autre part, on pourrait prévoir qu'il y ait plusieurs empiècements placés à différents endroits de la coque.Other modes of construction are also suitable. In particular the yoke could cover the entire hull, or it could include more or less two widths. On the other hand, it could be expected that there are several inserts placed at different locations on the hull.

Les figures 4 et 5 montrent un casque 30 selon un autre mode de mise en oeuvre de l'invention. La coque 31 du casque est habillée avec un empiècement 33 qui couvre la partie supérieure de la coque, en laissant dégagées la partie avant et la partie arrière.The Figures 4 and 5 show a helmet 30 according to another embodiment of the invention. The shell 31 of the helmet is dressed with a yoke 33 which covers the upper part of the hull, leaving unobstructed the front part and the rear part.

L'empiècement est ici formé de cinq laizes dont les laizes 33a, 33b, 33c, 33d qui sont visibles dans les figures. Comme précédemment les laizes sont assemblées de façon que l'empiècement épouse la forme arrondie de la coque sans former de plis. L'empiècement est découpé au niveau des évents du casque de façon à ne pas entraver la circulation d'air entre l'extérieur et l'intérieur.The yoke is here formed of five widths whose widths 33a, 33b, 33c, 33d which are visible in the figures. As previously the widths are assembled so that the yoke matches the rounded shape of the shell without forming folds. The yoke is cut at the vents of the helmet so as not to impede the flow of air between the outside and the inside.

La matière de l'empiècement est la même que celle qui a été décrite pour le casque précédent. Comme dans le cas précédent, l'empiècement peut couvrir la calotte de façon différente, et présenter un nombre de laizes plus ou moins important.The material of the yoke is the same as that described for the previous helmet. As in the previous case, the yoke can cover the cap in a different way, and present a number of more or less important widths.

Globalement un empiècement comprend deux bords transversaux qui s'étendent d'un hémisphère à l'autre de la coque, et des bords de liaison entre ces bords transversaux.Overall a yoke comprises two transverse edges that extend from one hemisphere to the other of the shell, and connecting edges between these transverse edges.

Selon une caractéristique de l'invention, l'empiècement est assemblé à la coque par au moins une couture qui est réalisée le long d'un bord. De préférence, le bord en question est un bord transversal de l'empiècement. Ce bord est cousu à la coque en pleine surface ou le long d'un de ses propres bords. Au niveau de l'autre bord transversal, également au niveau des évents l'empiècement peut être cousu ou collé à la coque, ou encore le bord de l'empiècement peut être replié sur lui-même et cousu puis collé sur la coque comme cela sera décrit dans la suite.According to a feature of the invention, the yoke is assembled to the shell by at least one seam which is made along an edge. Preferably, the edge in question is a transverse edge of the yoke. This edge is sewn to the hull in full surface or along one of its own edges. At the other transverse edge, also at the level of the vents the yoke can be sewn or glued to the shell, or the edge of the yoke can be folded on itself and sewn and then glued to the shell like this will be described later.

D'autres coutures peuvent aussi être réalisées entre les différentes laizes d'un empiècement, en liant ou sans lier la coque et l'empiècement dans cette zone.Other seams can also be made between the different widths of a yoke, by binding or without binding the shell and the yoke in this area.

Comme la coque présente une fine épaisseur, les coutures peuvent être réalisées simplement, par exemple à l'aide d'une machine à coudre classique comme celles qui sont utilisées dans le domaine de la chaussure. Une matière comme le polycarbonate ou l'ABS supporte facilement d'être perforée par une aiguille et se prête bien à un assemblage par couture.As the shell has a thin thickness, the seams can be made simply, for example using a conventional sewing machine such as those used in the field of footwear. A material such as polycarbonate or ABS easily withstands a needle and is well suited for sewing.

Les coutures assurent un maintien étroit de l'empiècement sur la coque, elles maintiennent une tension durable dans l'empiècement qui évite la formation de plis. Les coutures garantissent un assemblage qui résiste aux agressions externes, notamment les impacts ou les déchirures. En plus, les coutures forment des lignes à la surface de la coque et elles impriment dans l'empiècement une empreinte en relief qui mettent en relief sa texture et contribuent à rendre l'esthétique du casque plus attractive. Avec la couture, l'empiècement est inamovible, c'est-à-dire qu'il ne peut pas être démonté sans détérioration, sauf le cas échéant par une personne expérimentée.The seams ensure a close fit of the yoke on the shell, they maintain a durable tension in the yoke that prevents the formation of creases. The seams guarantee an assembly that resists external aggression, including impacts or tears. In addition, the seams form lines on the surface of the shell and they print in the yoke a relief imprint that highlight its texture and contribute to make the aesthetics of the helmet more attractive. With the seam, the yoke is irremovable, that is to say it can not be disassembled without deterioration, except where appropriate by an experienced person.

Il peut exister des zones du casque où la paroi de la coque forme un creux. Dans ces zones, l'empiècement a tendance à s'écarter naturellement de la paroi de la coque. On peut encoller ces zones préalablement à l'application de l'empiècement sur la coque et exercer un appui sur l'empiècement pour qu'il s'étire localement et épouse la forme de la coque dans ces zones de creux.There may be areas of the helmet where the wall of the shell forms a hollow. In these areas, the yoke tends to depart naturally from the hull wall. These areas can be glued prior to the application of the yoke on the shell and exert a support on the yoke so that it stretches locally and matches the shape of the shell in these areas of hollow.

Les figures 6 à 21 illustrent différents modes de montage de la liaison entre l'empiècement et la coque. Elles illustrent plus particulièrement le montage de l'empiècement 23 sur la coque 21 du premier mode de réalisation. Pour faciliter la compréhension de l'invention les références des figures 2 et 3 seront reprises dans ces figures 6 à 21 pour désigner la coque et les différentes laizes de l'empiècement.The Figures 6 to 21 illustrate different ways of mounting the connection between the yoke and the hull. They illustrate more particularly the mounting of the yoke 23 on the hull 21 of the first embodiment. To facilitate the understanding of the invention the references of Figures 2 and 3 will be included in these Figures 6 to 21 to designate the shell and the different widths of the yoke.

Les figures 6 à 9 illustrent différents modes de montage de l'empiècement en pleine surface de la coque.The Figures 6 to 9 illustrate different modes of mounting the yoke in full surface of the hull.

Selon la figure 6, le bord transversal supérieur de la laize 23b forme un ourlet dont le rabat est cousu à la coque 22 par une ligne de couture 40. La ligne de couture n'est pas visible dans ce cas.According to figure 6 , the upper transverse edge of the width 23b forms a hem whose flap is sewn to the shell 22 by a seam line 40. The seam line is not visible in this case.

Selon la figure 7, le bord de la laize 23b forme un ourlet puis l'ensemble est cousu par une ligne de couture 41.According to figure 7 , the edge of the width 23b forms a hem and the whole is sewn by a seam line 41.

Selon la figure 8, le rabat de l'ourlet est cousu à la coque 22 par une première ligne de couture 43, puis l'ensemble est cousu à la coque par une seconde ligne 44.According to figure 8 , the flap of the hem is sewn to the shell 22 by a first seam line 43, then the whole is sewn to the shell by a second line 44.

Selon la figure 9, on forme un ourlet cousu par une ligne de couture 45 puis on colle l'ensemble à la coque au moyen d'une bande de colle 46. Dans ce cas, la couture est visible, mais elle ne lie pas l'empiècement à la coque. On s'arrange alors pour que ce soit l'autre bord transversal qui soit cousu à la coque.According to figure 9 a hem is sewn by a seam line 45 and then the whole is glued to the shell by means of a glue strip 46. In this case, the seam is visible, but it does not bind the yoke to the shell. We then arrange for it to be the other transverse edge that is sewn to the hull.

Les figures 10 à 14 illustrent la jonction entre les deux laizes 23a et 23b. Selon la figure 10, les deux laizes sont cousues bord contre bord par une ligne de couture 48 qui est placée avec les rabats du côté de la coque.The Figures 10 to 14 illustrate the junction between the two widths 23a and 23b. According to figure 10 , the two widths are sewn edge to edge by a seam line 48 which is placed with the flaps on the side of the shell.

Selon la figure 11 on forme un ourlet au bord de la laize 23b que l'on coud à la laize 23a par une ligne de couture 49.According to figure 11 forming a hem at the edge of the width 23b which is sewn at the width 23a by a seam line 49.

La figure 12 montre le même type de montage, mais la ligne de couture 50 lie aussi la coque.The figure 12 shows the same type of assembly, but the sewing line 50 also binds the shell.

Selon la figure 13 les deux laizes son cousues bord contre bord par une ligne de couture 52, puis chaque rabat est cousu, par un ligne 53, 54.According to figure 13 both sides are sewn edge to edge by a seam line 52, then each flap is sewn by a line 53, 54.

Selon la figure 14, les deux laizes sont cousues bord contre bord par une ligne 55 puis chaque bord de laize est cousu à la coque par une ligne de couture 56, 57 visible de l'extérieur.According to figure 14 , the two widths are sewn edge by edge by a line 55 and each edge of width is sewn to the shell by a seam line 56, 57 visible from the outside.

Les figures 15 à 18 illustrent le montage de la laize 23a au niveau de l'ouverture 26 d'un évent.The Figures 15 to 18 illustrate the mounting of the width 23a at the opening 26 of a vent.

Selon la figure 15, la laize est découpée et les bords de la découpe sont rabattus au travers de l'ouverture 26, à l'intérieur de la coque. Ils sont cousus par une couture 60.According to figure 15 , the width is cut and the edges of the cut are folded through the opening 26, inside the shell. They are sewn by a seam 60.

Selon la figure 16, les bords de la découpe sont passés au travers de la découpe, ils sont collés à l'intérieur de la coque par une bande de colle 61.According to figure 16 , the edges of the cut are passed through the cut, they are glued inside the shell by a band of glue 61.

Selon la figure 17, les bords de la découpe sont rabattus sur l'empiècement lui-même et l'ensemble est cousu sur la coque par une ligne de couture 62.According to figure 17 the edges of the cut are folded over the yoke itself and the whole is sewn on the shell by a seam line 62.

Selon la figure 18, l'empiècement est découpé au raz de l'ouverture 26 et ses bords sont collés par une bande de colle 63.According to figure 18 , the yoke is cut to the razor of the opening 26 and its edges are glued by an adhesive strip 63.

Les figures 19 à 22 illustrent le montage d'un bord de l'empiècement le long d'un bord de la coque 22.The Figures 19 to 22 illustrate the mounting of an edge of the yoke along an edge of the shell 22.

Selon la figure 19, le rebord de l'empiècement 23 est rabattu et collé à l'intérieur de la coque 22 par une bande de colle 64.According to figure 19 , the rim of the yoke 23 is folded and glued inside the shell 22 by an adhesive strip 64.

Selon la figure 20, au lieu d'être collé, le bord est cousu par une ligne de couture 65 qui traverse l'ensemble et qui est visible de l'extérieur.According to figure 20 instead of being glued, the edge is sewn by a seam line 65 which passes through the assembly and which is visible from the outside.

Selon la figure 21, le rabat de l'empiècement 23 est replié entre l'empiècement et la coque, et l'ensemble est cousu par une ligne de couture 66.According to figure 21 , the flap of the yoke 23 is folded between the yoke and the shell, and the assembly is sewn by a seam line 66.

Ces différents modes de montage permettent d'habiller la coque avec l'empiècement, et de tendre celui-ci sans qu'il forme de plis. L'empiècement est alors intégré complètement dans la structure du casque sur le plan de l'esthétique. Le mode de montage est choisi en fonction de la matière utilisée pour réaliser l'empiècement, de la forme des laizes et également de l'effet esthétique recherché. D'autres modes de montage peuvent aussi convenir.These different modes of assembly make it possible to dress the shell with the yoke, and to stretch it without forming folds. The yoke is then integrated completely into the structure of the helmet in terms of aesthetics. The mounting mode is chosen according to the material used to make the yoke, the shape of the widths and also the desired aesthetic effect. Other mounting modes may also be suitable.

Selon le procédé de fabrication de l'invention, on réalise dans un premier temps la coque du casque et l'empiècement, on assemble ces deux éléments, puis on garnit la coque avec la calotte selon l'une des techniques évoquées plus haut.According to the manufacturing method of the invention, the shell of the helmet and the yoke is first made, these two elements are assembled, then the shell is filled with the cap according to one of the techniques mentioned above.

La figure 22 illustre cette étape du procédé. D'un côté on prépare une coque nue 68. La coque est découpée et mise en forme par toute technique appropriée, notamment par thermoformage. Elle possède sa forme finale, avec le cas échéant les ouvertures pour les évents et les arêtes de rupture de forme pour les zones en creux ou en relief.The figure 22 illustrates this step of the process. On one side is prepared a bare shell 68. The shell is cut and shaped by any appropriate technique, including thermoforming. It has its final shape, with the possible openings for vents and break edges for recessed or raised areas.

D'un autre côté on prépare l'empiècement 69, avec le cas échéant ses différentes laizes jointes entre elles. Les ouvertures pour les évents peuvent être réalisées avant ou après l'assemblage de l'empiècement sur la coque.On the other hand is prepared the yoke 69, with the appropriate if its different widths joined together. The openings for the vents can be made before or after assembly of the yoke on the shell.

L'empiècement est ensuite assemblé à la coque le long de ses différents bords. On réalise un couture sur au moins un bord de l'empiècement. Sur les autres bords on utilise une technique de couture ou de collage comme cela a été décrit relativement aux figures précédentes. Au niveau des ouvertures c'est la même chose.The yoke is then assembled to the shell along its different edges. Sewing is performed on at least one edge of the yoke. On the other edges, a seaming or gluing technique is used as described with reference to the preceding figures. At the level of openings it's the same thing.

Ensuite on garnit la coque avec la calotte. Selon une première technique, la calotte est réalisée à part et elle est assemblée à l'intérieur de la coque par de la colle ou un adhésif, ou tout autre moyeu approprié.Then fill the hull with the cap. According to a first technique, the cap is made apart and is assembled inside the shell by glue or adhesive, or any other appropriate hub.

Selon une seconde technique, la coque est placée dans un moule d'injection et de la matière est injectée dans le moule pour former la calotte. Dans cette technique la paroi de la coque est plaquée contre l'empreinte du moule, y compris dans les zones qui sont habillées par l'empiècement. Ceci garantit une application de l'empiècement contre la coque, y compris dans les zones en creux. Eventuellement, à l'assemblage de l'empiècement, on peut prévoir d'encoller ces zones pour renforcer l'adhérence avec la coque. On peut prévoir aussi de placer un film de colle thermofusible entre l'empiècement et la coque au moment de son assemblage. Au moment de l'injection, le film de colle fond et contribue à l'adhérence de l'empiècement sur la coque. Pour l'injection on peut utiliser la même presse et le même moule pour des casques dont la coque est habillée et des casques dont la coque est nue. En effet, la présence de l'empiècement ne modifie pas la mise en place de la coque dans le moule de façon significative.According to a second technique, the shell is placed in an injection mold and material is injected into the mold to form the cap. In this technique the wall of the shell is pressed against the mold cavity, including in areas that are dressed by the yoke. This ensures application of the yoke against the shell, including in the recessed areas. Optionally, the assembly of the yoke can be provided to glue these areas to enhance the adhesion with the shell. One can also provide to place a hot melt glue film between the yoke and the shell at the time of assembly. At moment of injection, the glue film melts and contributes to the adhesion of the yoke on the shell. For the injection can be used the same press and the same mold for helmets whose shell is dressed and helmets whose shell is bare. Indeed, the presence of the yoke does not change the establishment of the hull in the mold significantly.

Pour la première technique de garniture, on peut prévoir de réaliser ces opérations dans une presse de reprise où la coque habillée de l'empiècement est compressée et le cas échéant chauffée.For the first filling technique, it can be provided to carry out these operations in a recovery press where the dressed shell of the yoke is compressed and optionally heated.

Lorsque la calotte est mise en place par injection à l'intérieur de la coque elle emprisonne tous les rabats qui sont repliés à l'intérieur de la coque, y compris dans les zones où les rabats n'auraient pas été liés à la coque.When the cap is put in place by injection inside the hull it traps all the flaps that are folded inside the hull, including in areas where the flaps were not linked to the hull.

La figure 23 illustre un autre mode de mise en oeuvre de l'invention. Dans un premier temps l'empiècement 70 est préparé, puis il est assemblé sur la feuille 71 de matériau thermoformable à partir de laquelle la coque est réalisée, par exemple à l'aide de deux lignes de couture 72 et 73 le long de chaque bord transversal de l'empiècement. Les autres bords sont collés, ou ils sont prévus pour être rabattus à l'intérieur de la coque après sa mise en forme. Ensuite, la feuille revêtue de l'empiècement est mise en forme puis découpée pour former la coque habillée. La chaleur nécessaire à la mise en forme de la feuille peut être utilisée par exemple pour faire fondre un film de colle entre l'empiècement et la coque qui renforce l'adhérence entre la coque et l'empiècement.The figure 23 illustrates another embodiment of the invention. Firstly, the yoke 70 is prepared, then it is assembled on the sheet 71 of thermoformable material from which the shell is made, for example with the aid of two seam lines 72 and 73 along each edge. cross section of the yoke. The other edges are glued, or they are intended to be folded inside the shell after shaping. Then, the sheet coated yoke is shaped and then cut to form the shell dressed. The heat necessary for the shaping of the sheet may be used for example to melt a film of glue between the yoke and the shell which enhances the adhesion between the shell and the yoke.

Naturellement la présente description n'est donnée qu'à titre indicatif et l'on pourrait adopter d'autres mises en oeuvre de l'invention sans pour autant sortir du cadre de celle-ci.Naturally, the present description is given only as an indication and other embodiments of the invention could be adopted without departing from the scope thereof.

En particulier le casque peut être équipé d'un dispositif de retenue et d'éléments de confort.In particular the helmet may be equipped with a retainer and comfort elements.

Egalement l'empiècement pourrait être réalisé en deux parties indépendantes, ou plus.Also the yoke could be made in two independent parts, or more.

Claims (10)

  1. Method for manufacturing a helmet having a thin outer shell (11, 21, 31, 68) and a shook absorbing inner cap (12, 22, 32), characterized in that the outer shell is made, in that a panel (23, 33, 69) made of a flexible material is prepared, in that the outer shell is connected to said panel by means of at least one seam line (40, 41, 44, 65, 66) along one edge of the panel, and in that the cap (12, 22, 32) is then made injection within the shell (11, 21, 31, 68) that is already covered by the panel (23, 33, 69).
  2. Manufacturing method according to claim 1, characterized in that said shell is formed by a shell made from a flat sheet having a thickness between 0.7 and 1.5 mm.
  3. Method according to one of claims 1 or 2, characterized in that the seam line (41, 44, 65, 66) is visible from the outside.
  4. Method according to one of claims I or 2, characterized in that the panel (23, 33) is formed by a plurality of widths (23a, 23b, 33a, 33b, 33c, 33d).
  5. Method according to claim 4, characterized in that a seam line (50, 56, 57) at the junction of two widths connects the panel to the shell.
  6. Method according to claim 4, characterized in that the widths (23a, 23b) have a different texture and/or different colors.
  7. Method according to one of claims 1 or 2, characterized in that at least one other edge of the panel is assembled to the shell by a seam line (40, 41, 44, 65, 66).
  8. Method according to one of claims I or 2, characterized in that at least one other edge of the panel is assembled to the shell by a strip of glue (46, 63, 64).
  9. Method according to one of claims 1 or 2, where the shell has openings (14, 15, 16, 25, 26) to form vents for ventilation, characterized in that the panel has cutouts coinciding with said openings.
  10. Method according to one of claims 1 or 2, characterized in that the flexible material is a textile fabric.
EP07014881A 2006-08-29 2007-07-30 Manufacturing method for a protective helmet Not-in-force EP1894483B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0607572A FR2905235B1 (en) 2006-08-29 2006-08-29 PROTECTIVE HELMET AND METHOD OF MANUFACTURING THE SAME

Publications (2)

Publication Number Publication Date
EP1894483A1 EP1894483A1 (en) 2008-03-05
EP1894483B1 true EP1894483B1 (en) 2009-10-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07014881A Not-in-force EP1894483B1 (en) 2006-08-29 2007-07-30 Manufacturing method for a protective helmet

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US (1) US20080052808A1 (en)
EP (1) EP1894483B1 (en)
AT (1) ATE446691T1 (en)
DE (2) DE602007002957D1 (en)
FR (1) FR2905235B1 (en)

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Also Published As

Publication number Publication date
EP1894483A1 (en) 2008-03-05
US20080052808A1 (en) 2008-03-06
DE602007002957D1 (en) 2009-12-10
FR2905235B1 (en) 2009-03-13
DE202007011997U1 (en) 2007-11-29
ATE446691T1 (en) 2009-11-15
FR2905235A1 (en) 2008-03-07

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