DE102004042199A1 - Gas feeding lance for side air bag system of motor vehicle, has reinforced section, which is made up of rolls and/or folds of part of single-piece textile fabric ply and connected to gas generator, where lance is made up of fabric ply - Google Patents

Abstract

The lance has a reinforcing section (19), which is made up of multiple rolls and/or folds of a part of a single-piece textile fabric ply (12) and connected with a gas generator, at an end. Another end of the lance and/or a gas discharging opening (16) in between the lance, are fluidically connected to a gas sack. The lance has a tubular shape and is made up of the single-piece textile fabric ply. An independent claim is also included for a method of producing a gas feeding lance for a side airbag system of a motor vehicle.

Description

The The invention relates to a gas feed lance for a Side airbag system for a motor vehicle according to the preamble of patent claim 1. Furthermore, the invention relates to a method for producing such a gas supply lance according to the preamble of the patent claim 5th

It Security systems are known, the one in a motor vehicle sedentary person in case of a sudden delay of the Driving movement to protect against injury, as opposed to this person the deceleration movement against an in-vehicle base, such as the dashboard, the front seat, the side wall, etc., is thrown. This leads without the said security systems frequently cause serious injuries to the or the vehicle occupants, because then no adequate protection in particular of the head and thorax of the vehicle occupant is present.

at Modern motor vehicles usually come Side airbags used. These are passive retention components, in the case of the impact of the motor vehicle abruptly with gas filled when, for example, an abrupt lateral acceleration occurs. Such a side airbag is triggered by one of an acceleration sensor activated gas generator, between a vehicle occupant and the adjacent vehicle door or side wall a cushion between the vehicle occupant and the respective vehicle area. Side airbag systems are for example designed as so-called curtain or curtain airbags and in Roof frame and / or window pillar area of the motor vehicle above the or side windows.

The EP 0 849 129 A1 shows a side airbag system for a motor vehicle, consisting of a gas bag with a plurality of gas chambers, which are connected via valves with a fixedly formed in the roof frame and window column area Gasleitkanal. This gas duct is arranged in the roof frame and window pillar region of the motor vehicle and is filled in the case of restraint with gas, said valves being actuated independently of each other. In this case, the Gasleitkanal is blown by two gas generators or by means of a stage gas generator offset simultaneously or at different times. This solution is technically very complicated because of the many valves and gas generators.

As is known, can Such a gas duct also from a to the vehicle type individual roof frame geometry adapted metal pipe to be formed, which is relatively expensive is in production. In addition, the transport of such a metallic Gas guide tube not uncomplicated, since this comparatively long and thin-walled are. Due to these characteristics, high transport costs are incurred for their promotion from the manufacturer to the vehicle manufacturer.

Furthermore, the DE 197 27 832 A1 a flame retardant device for airbags of an airbag module in which a curtain-like airbag consists of a textile fabric, in which a tubular, a hot gas jet conductive part is introduced, which is also formed by the textile fabric. At one end of this part has a Einblasmund and, inter alia, at the other end an outlet for the gas in the gas bag.

The tubular Part consists of a fabric layer that is folded so that their Edges lie on each other. These edges and defined end faces are together with the upper part and lower part of the airbag by means of a Sewn on the edge seam. The fabric layer also has a breakthrough, which is provided with the injection mouth.

in the Area of the gas inlet of a tubular gas supply line arise high temperatures, making the high-energy, from the gas generator flowing Gas without separate measures holes in can burn the tube. When choosing a particularly stable and for higher Temperatures of suitable tissue, which may also be coated, is however with increased Material costs in the production and an increased component weight to count.

In front In this background, the invention is based on the object, a Gaszuführlanze for a side airbag system for a To provide motor vehicle of the aforementioned type and a method for Production of such a gas supply lance to disposal to provide easy to manufacture, inexpensive to transport, flexible can be laid in a motor vehicle and especially suitable for curtain-type airbags is. In addition, this gas supply lance is a inexpensive Protection against damage by the hot and allow high-energy gas of the gas generator.

The invention is based on the finding that a flexible gas supply lance solves this problem and can be laid in a simple manner in almost any arbitrary cavity of the vehicle body from the gas generator to the airbag airbag. In addition, it was recognized that by a process-favorable folding process of a tailored tissue layer in this amplification kungsbereich on the gas supply lance form, which is particularly suitable for receiving the gas generator and its comparatively hot gases.

The Invention is according to the features of Main claim of a gas supply lance for a side airbag system for a motor vehicle, the one-piece textile fabric layer exists. To solve the task is also provided that the gas supply lance has a tubular shape, which has a reinforced portion at one end portion, which multiple rolling or folding of a part of the fabric layer, the reinforced Section is connectable to the gas generator, and the other end the gas supply lance and / or at least one intermediate gas outlet opening with at least one gas bag fluidly is connectable.

Consequently is done in a simple way, namely by repeated folding created a tubular gas supply lance, which in its gas inlet area receives a gain. It learns the From a textile fabric gas supply lance also a certain robustness. Nevertheless, the gas supply lance remains flexible and on the one hand connected to the gas generator and on the other hand with an example curtain-like airbag gas bag in Connection, allowing the gas from the gas generator via the gas supply lance can flow to the gas bag.

One particular advantage of the invention is that the gas supply lance with the reinforcement area from a one-piece Fabric layer exists. This is eliminated a composition of the textile blank from several parts, so that elaborate sewing or glueing unnecessary are. Only a seam or a border seam or a glue line is at the longitudinal edge the gas supply lance required.

The Gaszuführlanze is preferably within the gas bag aufzublasenden in the cavity the roof frame and / or window column area of a motor vehicle arranged above a side window.

The under claims describe preferred developments or refinements of Invention.

Around Accordingly, the tubular shape of the gas supply lance according to the invention to receive, has the one-piece cut the fabric layer on a Side of their longitudinal extent a lateral broadening on, initially in several steps each about their longitudinal extent tubular is foldable. Furthermore, in at least one further step the cut to its total length extent folded into a tube formation. The lateral broadening causes by the multiple folding process the reinforcement of the corresponding section the gas supply lance.

The closed tube shape receives the gas supply lance in that the long side the hose structure on which the folded longitudinal sides of the fabric layer end, Sewn together, welded or is glued.

Of the an end portion of the tubular gas supply lance is preferred with at least one chamber of the curtain-like airbag aerodynamically connected. In addition, according to a further embodiment of the invention the hose structure at the outside of the gain range lying portion have circumferentially at least one gas outlet opening, in the interior of another airbag chamber or a second Airbag is directed. In this case, this may be the entry area the hose opposite end be closed by, for example, sewn shut.

• – dass die Gewebelage derartig zugeschnitten wird, dass der Zuschnitt an einer Seite der Längsausdehnung eine seitliche Verbreiterung aufweist,
• – dass die seitliche Verbreiterung der Gewebelage dann zumindest einmal etwa hälftig um ihre Längsausdehnung schlauchartig gefaltet wird,
• – dass danach die Gewebelage in ihrer Gesamtlängsausdehnung zu einem Schlauchgebilde gefaltet wird, so dass dessen freien Längskanten im wesentlichen übereinander liegen, und
• – dass schließlich die Längskanten des Schlauchgebildes vernäht oder verklebt werden.

The object underlying the invention is also achieved by a method for producing a gas supply lance for a side airbag system for a motor vehicle, wherein the gas supply lance consists of a one-piece textile fabric layer. This process is characterized in terms of the process steps:

• That the fabric layer is cut to such an extent that the blank has a lateral broadening on one side of the longitudinal extent,
• - That the lateral broadening of the fabric layer is then at least once folded in a tube about its longitudinal extent,
• - That then the fabric layer is folded in its overall longitudinal extent to form a tube, so that its free longitudinal edges are substantially one above the other, and
• - That finally the longitudinal edges of the tube structure are sewn or glued.

Consequently becomes, so to speak a simple "roll folding" in several steps executed which the hose structure for the gas supply lance arise after sewing the folding process by sewing, welding and / or Gluing the free longitudinal edges in his final Form is set.

The Invention will be described below with reference to the accompanying drawings on some embodiments explained in more detail. In this shows

1 a schematic longitudinal sectional view of a motor vehicle with a side airbag system,

2 to 5 Views of the gas supply lance according to the invention in their production steps, and

6 and 7 Cross-sectional views of the gas supply lance in two different embodiments.

The car 1 according to 1 shows in longitudinal section a vehicle side, to which reference is made below. However, the following Ausfüh ments also apply to the other, not visible side of the motor vehicle 1 to.

On the motor vehicle 1 are two side windows 2 for the driver area 3 and the backseat area 4 arranged side by side. In the rear window column area 5 , usually the so-called C-pillar, and in the roof frame area 6 the vehicle body 7 , is in their cavities a side airbag system 8th accommodated.

The side airbag system 8th consists essentially of one in the window frame area 5 arranged gas generator 9 and one through this inflatable airbag 10 , In the inflated state of the airbag 10 This forms a gas-filled, cushion-like curtain, as in 1 is shown. The gas generator 9 and the gas bag 10 are through a flexible gas supply lance 11 fluidically interconnected, consisting of a one-piece textile fabric layer 12 consists.

The one-piece cut 13 the textile fabric layer 12 is in 2 shown. The 2 to 5 show the procedure for the production of gas supply lance 11 from this blank 13 , The essentially rectangular blank 13 owns on the right according to 2 on one side of its longitudinal extent a likewise rectangular broadening 14 , The dash-dot-dot-dash line is in 2 to 5 the folding line belonging to the respective folding step 15 shown. The right arrow shows the folding direction of the blank 13 at. In the left section of the blank 13 is a gas outlet 16 introduced, by as by the gas generator remote end of the gas supply lance 11 Gas towards the gas bag 10 can flow out. According to further embodiments of the invention, a plurality of outflow openings may be provided along the longitudinal extent, which may have different outflow areas.

First, the lateral broadening 14 the fabric layer 12 a first time about half of its longitudinal extent along the fold line 15 folded like a tube and reaches the state according to 3 , The fabric layer 12 is now double-layered in this area. Then the lateral broadening becomes 14 the fabric layer 12 once again about their longitudinal extent along the fold line 14 folded and reached the in 4 shown state. At the same time the lateral broadening forms 14 already a partial tube, wherein the fabric layer 12 now in three layers on top of each other. Then the fabric layer becomes 12 to their total length extent to a hose formation 17 folded, that has a pure rectangular shape, as in 5 is clarified. Now lie the free longitudinal edges 18 of the hose structure 17 one above the other. The following are the longitudinal edges 18 Sewn or glued along the dotted line, bringing the gas supply lance 11 in the finished state according to 5 located. The multiply folded broadening 14 results in a reinforced section 19 the gas supply lance 11 for receiving a gas generator 9 ,

In cross section, the gas supply lance 11 for example, the shape according to 6 or the form according to 7 taking. Other cross-sectional shapes are at the discretion of the skilled person. In the hose formation 17 to 6 are the long edges 18 simply sewn or glued while the longitudinal edges 18 to 7 are sewn twice and glued.

Finally, the reinforced section 19 the gas supply lance 11 end with the gas generator 9 connected, then in the gas bag 10 introduced and merged fluidically with the latter.

1

motor vehicle

2

sidewindow

3

driver's area

4

Back seat area

5

Window pillar area

6

Roof frame region

7

vehicle body

8th

Side airbag system

9

inflator

10

airbag or airbag curtain

11

Gaszuführlanze

12

fabric layer

13

cut

14

widening

15

fold line

16

Gas outlet

17

hose formation

18

longitudinal edge

19

reinforced section

Claims (5)

Gas supply lance for a side airbag system ( 8th ) for a motor vehicle ( 1 ) consisting of a one-piece textile fabric layer ( 12 ), characterized in that the gas supply lance ( 11 ) has a tubular shape, which at one end region has a reinforced section ( 19 ), which consists of multiple rolling or folding of a part of the fabric layer ( 12 ), the reinforced section ( 19 ) with the gas generator ( 9 ) is connectable, and the other end of the gas supply lance ( 11 ) and / or at least one intermediate gas outlet opening ( 16 ) with at least one gas bag ( 10 ) is fluidically connectable. Gas feed lance according to claim 1, characterized in that it consists of a one-piece blank ( 13 ) of the fabric layer ( 12 ) is formed on one side of its longitudinal extent a lateral broadening ( 14 ), which is tube-folded in several steps in each case by their longitudinal extent, and in that the one-piece blank ( 13 ) in at least one further step about its total length extension to a tubular structure ( 17 ) is folded. Gas feed lance according to claim 1 or 2, characterized in that the longitudinal side of the hose structure ( 17 ), on which the folded longitudinal sides of the fabric layer ( 12 ), sewn together, welded or glued together. Gas feed lance according to one of the preceding claims, characterized in that the hose structure ( 17 ) at the outside of the amplification area ( 19 ) lying portion circumferentially at least one gas outlet opening ( 16 ) having. Method for producing a gas feed lance ( 11 ) for a side airbag system ( 8th ) for a motor vehicle ( 1 ), wherein the gas supply lance ( 11 ) from a one-piece textile fabric layer ( 12 ), characterized in that - the fabric layer ( 12 ) is cut to such an extent that the blank ( 13 ) on one side of the longitudinal extent a lateral broadening ( 14 ), that the lateral broadening ( 14 ) of the fabric layer ( 12 ) is folded in a hose-like manner at least once about its longitudinal extent, - that after that the fabric layer ( 12 ) in its overall longitudinal extent to form a tubular structure ( 17 ) is folded so that its free longitudinal edges are substantially one above the other, and - that subsequently the longitudinal edges of the hose structure ( 17 ) are sewn or glued.