FR2886913A1 - Vehicle airbag manufacturing procedure uses semi-circular and square fabric panels for one surface of bag to reduce wastage of material - Google Patents
Vehicle airbag manufacturing procedure uses semi-circular and square fabric panels for one surface of bag to reduce wastage of material Download PDFInfo
- Publication number
- FR2886913A1 FR2886913A1 FR0505900A FR0505900A FR2886913A1 FR 2886913 A1 FR2886913 A1 FR 2886913A1 FR 0505900 A FR0505900 A FR 0505900A FR 0505900 A FR0505900 A FR 0505900A FR 2886913 A1 FR2886913 A1 FR 2886913A1
- Authority
- FR
- France
- Prior art keywords
- bag
- circular
- manufacturing procedure
- parts
- vehicle airbag
- Prior art date
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/235—Inflatable members characterised by their material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/235—Inflatable members characterised by their material
- B60R2021/23533—Inflatable members characterised by their material characterised by the manufacturing process
Abstract
Description
1 28869131 2886913
La présente invention concerne un procédé de fabrication d'un sac de sécurité gonflable de forme ovoïde et a trait également aux sacs obtenus par ce procédé. The present invention relates to a method of manufacturing an ovoid shaped inflatable safety bag and also relates to the bags obtained by this method.
Les sacs de sécurité gonflables destinés à la protection frontale des conducteurs de véhicules sont généralement réalisés par l'assemblage de deux panneaux de forme circulaire, ou plus ou moins elliptique. Ces panneaux sont découpés d'une seule pièce sur des rouleaux du matériau destiné à la confection des sacs, constitué par exemple par des tissus synthétiques. Les caractéristiques physiques ou mécaniques du panneau sont donc généralement uniformes sur toute sa surface. Inflatable bags for the frontal protection of vehicle drivers are generally made by assembling two panels of circular shape, or more or less elliptical. These panels are cut in one piece on rolls of material for making bags, consisting for example of synthetic fabrics. The physical or mechanical characteristics of the panel are therefore generally uniform over its entire surface.
Par ailleurs, la découpe desdits panneaux circulaires ou elliptiques sur la largeur du rouleau entraîne des chutes de tissu relativement importantes, ce qui accroît le coût de fabrication du sac de sécurité. Furthermore, the cutting of said circular or elliptical panels across the width of the roller causes relatively large tissue falls, which increases the cost of manufacturing the security bag.
La présente invention a donc pour but principal de remédier à cet inconvénient et, pour ce faire, elle a pour objet un procédé de fabrication qui se caractérise essentiellement en ce qu'il consiste à réaliser l'une au moins des faces du sac au moyen d'un assemblage de pièces comprenant une pièce de forme générale rectangulaire et deux pièces de forme générale semi-circulaire comportant une découpe centrale correspondant sensiblement à la moitié de la surface de la pièce rectangulaire. The main object of the present invention is therefore to remedy this drawback and, for this purpose, it relates to a manufacturing method which is essentially characterized in that it consists in producing at least one of the faces of the bag by means of an assembly of parts comprising a generally rectangular piece and two parts of generally semicircular shape comprising a central cut corresponding substantially to half the surface of the rectangular piece.
Grâce à cette disposition, en choisissant judicieusement les dimensions respectives de la pièce rectangulaire et des pièces semi-circulaires, il est possible de découper ces dernières en les imbriquant l'une dans l'autre, ce qui permet de réduire les chutes de tissu de manière significative, comme on le verra par la suite. With this arrangement, by judiciously choosing the respective dimensions of the rectangular piece and the semicircular pieces, it is possible to cut the latter by nesting them into one another, which reduces the tissue falls of significantly, as will be seen later.
Les différentes pièces formant la face du sac peuvent être assemblées entre elles par couture, par collage, ou par soudure. On peu également en profiter pour assembler au sac des accessoires divers comme par exemple des brides de retenue. The different pieces forming the face of the bag can be assembled together by stitching, gluing, or welding. It can also be used to assemble the bag various accessories such as retaining flanges.
Par ailleurs, les différentes pièces du sac ainsi obtenu peuvent être réalisées en un même matériau, mais il est également possible d'utiliser, pour la pièce rectangulaire, un matériau différent. Moreover, the different parts of the bag thus obtained can be made of the same material, but it is also possible to use, for the rectangular piece, a different material.
2 2886913 La partie centrale du sac supporte en effet généralement le générateur de gaz et subit donc des contraintes spécifiques. On pourra ainsi avantageusement réaliser la pièce rectangulaire avec un tissu plus résistant et/ou renforcé localement. Dans un mode de réalisation particulier de l'invention, la pièce rectangulaire est carrée. 2 2886913 The central portion of the bag generally supports the gas generator and therefore undergoes specific constraints. It will thus be possible advantageously to produce the rectangular piece with a stronger and / or locally reinforced fabric. In a particular embodiment of the invention, the rectangular piece is square.
Plusieurs formes d'exécution de l'invention sont décrites ci-après à titre d'exemples en référence au dessin annexé dans lequel - les figures la à lc, illustrent les différentes étapes de la fabrication d'un sac de sécurité gonflable conforme à l'invention; - les figures 2a et 2b, illustrent le mode de découpe des pièces constituant le sac; - la figure 3 illustre le mode de découpe d'un sac traditionnel; et - la figure 4 représente une variante de réalisation de l'invention. Several embodiments of the invention are described hereinafter by way of example with reference to the accompanying drawing in which - Figures la to lc, illustrate the various steps of the manufacture of an air bag according to the invention. 'invention; - Figures 2a and 2b illustrate the cutting mode of the parts constituting the bag; - Figure 3 illustrates the cutting mode of a traditional bag; and - Figure 4 shows an alternative embodiment of the invention.
Le procédé de fabrication illustré par les figures la à le est décrit ici dans son application à un sac de sécurité gonflable de forme ronde destiné plus particulièrement à la protection frontale des conducteurs. Conformément à la présente invention, l'une au moins des faces rondes du sac est constituée par un assemblage de trois pièces, à savoir, une pièce de forme générale rectangulaire 1, constituée ici par un carré, et deux pièces semi-circulaires 2 et 3 comportant une découpe centrale qui correspond sensiblement à la moitié de la surface du carré 1. The manufacturing method illustrated in Figures la to l'is described here in its application to a round shaped inflatable safety bag for more particularly to the front protection of the conductors. According to the present invention, at least one of the round faces of the bag is constituted by an assembly of three pieces, namely, a piece of generally rectangular shape 1, here constituted by a square, and two semicircular pieces 2 and 3 having a central cut that corresponds substantially to half the area of the square 1.
Les différentes pièces 1 à 3 sont assemblées entre elles par couture, par collage, par soudure, ou par tout autre moyen approprié, comme représenté en 4 sur la figure lc, afin de constituer un panneau parfaitement circulaire. The various parts 1 to 3 are assembled together by sewing, gluing, welding, or by any other appropriate means, as shown at 4 in Figure lc, to form a perfectly circular panel.
Grâce à cette disposition, les pièces centrales 1 peuvent être découpées dans un rouleau de tissu sans aucune chute, comme illustré par la figure 2a. Quant aux pièces semi-circulaires 2 et 3, si l'on choisit judicieusement leurs dimensions par rapport aux pièces centrales, elles peuvent être découpées en étant imbriquées les unes dans les autres, comme illustré par la figure 2b, réduisant ainsi les chutes de tissu à environ 7%, alors que dans la méthode 3 2886913 traditionnelle illustrée par la figure 3, la découpe de pièces circulaires 5 engendre des chutes qui sont au moins du double, soit 14%. With this arrangement, the central parts 1 can be cut in a roll of fabric without any drop, as shown in Figure 2a. As for the semicircular pieces 2 and 3, if one chooses judiciously their dimensions with respect to the central parts, they can be cut by being nested inside one another, as illustrated by the figure 2b, thus reducing the falls of fabric at around 7%, whereas in the traditional method 2886913 illustrated in FIG. 3, the cutting of circular pieces 5 generates falls which are at least double, ie 14%.
Il convient par ailleurs de noter que le procédé de fabrication conforme à l'invention permet d'utiliser des matériaux différents pour chacune des pièces constituant le sac, ce qui permet d'optimiser les caractéristiques en fonction des contraintes subies. Ainsi par exemple, la pièce centrale 1 va généralement supporter le générateur de gaz et subir par conséquent des contraintes spécifiques. On pourra donc utiliser pour cette pièce un matériau plus résistant. Le faible encombrement de cette pièce facilite en outre la mise en place de renforts mécaniques et/ou thermiques au moyen de machines et procédés industriels. It should also be noted that the manufacturing method according to the invention makes it possible to use different materials for each of the parts constituting the bag, which makes it possible to optimize the characteristics as a function of the stresses undergone. For example, the central part 1 will generally support the gas generator and therefore suffer specific constraints. We can therefore use for this piece a more resistant material. The small size of this part also facilitates the establishment of mechanical and / or thermal reinforcements by means of machines and industrial processes.
Enfin, on pourra avantageusement profiter de l'assemblage des différentes pièces 1, 2 et 3 du sac pour y fixer divers accessoires, réduisant ainsi le nombre d'opérations et donc le coût de fabrication. Il pourra s'agir par exemple, comme illustré sur la figure 4, des brides de retenue 6 qui sont de manière classique montés sur les sacs de sécurité gonflables pour la protection des conducteurs. Finally, we can advantageously enjoy the assembly of the various parts 1, 2 and 3 of the bag to attach various accessories, thereby reducing the number of operations and therefore the cost of manufacture. It may be for example, as shown in Figure 4, retaining flanges 6 which are conventionally mounted on the air bags for the protection of conductors.
4 28869134 2886913
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0505900A FR2886913B1 (en) | 2005-06-10 | 2005-06-10 | METHOD FOR MANUFACTURING AN OVOIDALLY SHAPED INFLATABLE SAFETY BAG AND BAG THUS OBTAINED |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0505900A FR2886913B1 (en) | 2005-06-10 | 2005-06-10 | METHOD FOR MANUFACTURING AN OVOIDALLY SHAPED INFLATABLE SAFETY BAG AND BAG THUS OBTAINED |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2886913A1 true FR2886913A1 (en) | 2006-12-15 |
FR2886913B1 FR2886913B1 (en) | 2007-09-07 |
Family
ID=35197671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR0505900A Expired - Fee Related FR2886913B1 (en) | 2005-06-10 | 2005-06-10 | METHOD FOR MANUFACTURING AN OVOIDALLY SHAPED INFLATABLE SAFETY BAG AND BAG THUS OBTAINED |
Country Status (1)
Country | Link |
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FR (1) | FR2886913B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10604259B2 (en) | 2016-01-20 | 2020-03-31 | Amsafe, Inc. | Occupant restraint systems having extending restraints, and associated systems and methods |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020177515A1 (en) * | 2001-04-20 | 2002-11-28 | Eduard Capdevilla | Bag turning device |
EP1493636A1 (en) * | 2003-06-30 | 2005-01-05 | Milliken & Company | Airbag and method for making an airbag |
-
2005
- 2005-06-10 FR FR0505900A patent/FR2886913B1/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020177515A1 (en) * | 2001-04-20 | 2002-11-28 | Eduard Capdevilla | Bag turning device |
EP1493636A1 (en) * | 2003-06-30 | 2005-01-05 | Milliken & Company | Airbag and method for making an airbag |
Also Published As
Publication number | Publication date |
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FR2886913B1 (en) | 2007-09-07 |
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CA | Change of address | ||
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Effective date: 20130228 |