DE102007029781A1 - Airbag folding method, involves providing airbag with airbag chambers, where each airbag chamber is automatically, separately and randomly folded by devices for folding airbag and is spatially separated from each other - Google Patents

Abstract

The method involves providing an airbag (1) with airbag chambers (2, 3), where each airbag chamber is automatically, separately and randomly folded by folding devices e.g. sliders (15-18). The chambers are arranged in such a manner that the chambers extend along an extension plane and are placed opposite to each other in a direction running along the extension plane. The chambers are spatially separated from each other along the direction by a separating agent (10), which longitudinally extends along another direction running transverse to the former direction. An independent claim is also included for a device for folding an airbag for an airbag module.

Description

The The invention relates to a method for folding a gas bag for an airbag module and a device according to the The preamble of claim 23 for carrying out the method.

From the WO97 / 10124 is a method and apparatus for folding a known airbag with only one chamber known. According to the aforementioned method, the airbag to be folded is spread flat on a support (extension plane) and gathered by four sliders, which face each other in pairs and enclose the gas bag in its flat expanded state along said support to a center. This type of folding is also called chaotic folding.

Of these, The invention is based on the object, a method for folding a at least two separate airbag chambers having Airbag of an airbag module and a device for implementation to provide the method of reproducing the unfolding of the Airbag to ensure when inflating the airbag.

This Problem is solved by a method having the features of the claim 1 solved.

After that is provided, each of the at least two gas bag chambers by means a device for folding the airbag separately to folds, in particular in separate subspaces a folding room.

in this connection each airbag chamber is preferably by means of a plurality of slides folded separately, preferably different gas bag chambers associated slides do not interact with each other.

at the process, the folding (Zusammenraffen) of the airbag chambers takes place in a chaotic way, d. h., the wrinkles created by the sliders have no preferred direction.

In In a variant of the method, the airbag chambers are arranged in such a way that that they spread out flat along an extension plane and along a first, extending along the plane of extension Opposite each other, with the two airbag chambers along the first direction are separated from each other and to each a gas bag package to a desired pack size, d. h., volume, be folded. This is where the spatial Separation of the two airbag chambers characterized in that each airbag chamber can be folded for oneself, without losing sight of the other Interacting with the gas bag chamber, d. h. to change their position in space.

By the spatial separation of the to a gas bag package to be folded Airbag chambers is particularly prevented layers of different Airbag chambers are folded uncontrollably on each other, causing the Reproducibility of the inflation process is detrimental. In particular, it is thus in symmetrically formed airbag chambers prevents inconsistent deployment of the airbag chambers and already during inflation a (symmetrical) equal behavior of the gas bag chambers causes.

The inventive method is particularly suitable for folding so-called twin gas bags, the two preferably mutually mirror-symmetrically shaped separate (from each other separate) airbag chambers, which have a connection area are interconnected, the two gas bag chambers in the inflated Condition so close to each other that they are on a front the airbag facing a person to be protected is a column form through which the two airbag chambers the front of the airbag completely separated are. This gap can further from a flat Gas bag part be covered, which are the two airbag chambers connects with each other (strained) and an impact surface for a part of the body to be protected Person forms, preferably for the head or upper body that person. Each of the two chambers preferably has an inflow opening on, for inflating the respective airbag chamber over a gas generator is fixable. The two airbag chambers Connecting area connecting preferably connects an edge portion of the inflow opening of the one Airbag chamber with an edge portion of the inflow opening the other chamber. Alternatively, the two airbag chambers a common inflow opening.

The inventive method can also gas bags be applied with more than two separate chambers in this Case must be the appropriate number of separable folding rooms to be provided.

To the spatial separation of the two airbag chambers to be folded or a folding space surrounding the gas bag, is preferably a provided a wall forming release agent, which is between the two airbag chambers along a second direction along extending transversely to the first direction along the plane of extent runs.

There the two to be folded, separate airbag chambers over a connection region are connected to each other, the release agent preferably a recess, preferably in the form of an interruption the release agent along the second direction, d. h., the release agent is preferably carried out in two parts.

In this interruption is now the connection area arranged so that the two gas bags before folding flattened on both sides of the release agent along the plane of extent can extend. Preferably, the release agent is through formed two separate aligned separating elements, the each extending along the second direction along. there have the two separating elements facing each other and along the second direction spaced free ends, the define (limit) the said interruption.

The Separating elements are in a variant of the invention along the second Direction linearly displaceable. In this case, first the airbag to be folded spread flat and then the two Separators moved toward each other. This is preferably done such that one or both separators join the connection area take their movement and in the second direction position. In their final position form the two separating elements then the said interruption U out. In an alternative variant the method according to the invention are the two Separators arranged fixed and limit with their respective free end the said interruption.

To arranging the connection area in the interruption the connection area preferably by means of a normal in the interruption to the extent level insertable placeholder (as a Element of the release agent), so that the connection area normal to the plane of extent and fixed along that plane of extension is. Before insertion becomes transverse to the plane of extension below the interruption of the release agent, a module housing arranged. The module housing, for example, in a continuous recess one along the plane of extension extending lower plate, so that the connection area is fixed by the placeholder this when intervening in the Interruption along a transverse plane to the extension plane (lower plate) extending direction against the module housing or a intended area of the module housing presses. Particularly preferred are the two airbag chambers along the first Direction through the placeholder introduced into the interruption completely separated from each other (spatially).

In a variant, the two flat spread gas bag chambers each by means of three independently movable Shifter by shirring on a gas bag package desired extent folded. For this purpose, each of the two airbag chambers first each with a transverse to the first direction first slide along the first direction to the other airbag chamber, wherein the respective airbag chamber lies in folds, in particular chaotic, so have no preferred direction.

To folding an airbag chamber along the first direction, that airbag chamber is moved by means of two along the second direction opposite each other and along the first direction extended second slider along the second direction gathered. The second slide slide on the one hand on the release agent or on a separating element and on the other hand on an adjacent first Slide along.

On this way, each airbag chamber is folded into a gas bag package, the transverse to the extension plane above the module housing, in which the folded gas bag to be stowed arranged is.

Prefers are the two folded airbag chambers (airbag packages) such along a direction transverse to the plane extending direction pressed into the module housing that part of the respective airbag chamber in a first receptacle and the other Part of the respective airbag chamber in a second receptacle of the Module housing is arranged.

The Volume ratio of the two distributed on the two shots Parts of a gas bag package is preferably by means of the second Slider set. These are the two shots of the module housing arranged behind one another along the second direction, wherein the Release agent along the second direction on the recordings passes. Both pictures are from both sides the release agent ago accessible. On both sides of the Release agent are each two second slide along the opposite direction. The opposite ones Sliders can independently of each other Shots are postponed. Will be a slider first along the first direction at least partially over the closer to him receiving the module housing shifted, so is the overlying place for The airbag chamber reduced accordingly and it can only a correspondingly smaller proportion of the relevant airbag chamber by means of the other second slider over the partially to be pushed undercover.

After this the two airbag chambers spatially separated from each other (above the module housing) along the plane of extent you have been bundled up to one airbag package each preferably by means of a packing punch transversely to the plane of extent pressed into the module housing, with each airbag chamber predefinable on the two receptacles of the module housing is distributed. In particular, the stowage of the two airbag packages takes place in separate receiving areas of the module housing.

The two recordings of the module housing are preferably by divided subdivisions so that said Parts of the airbag packages (airbag package halves) in the recordings are also spatially separated from each other.

Of Further, the problem of the present invention an apparatus for carrying out the inventive Method solved with the features of claim 23.

After that is in such a device, which has a folding space, which is set up and provided, one to a gas bag package to be folded airbag in a flat-spread state and in particular to surround it on all sides, wherein the volume of the folding space for folding the airbag to a Airbag package is reducible, a separable in the folding space release agent provided for the division of the folding space, which is designed to the folding space in two separate subspaces too subdivide, with the two subspaces to accommodate each an airbag chamber of a gas bag to be folded in a flat spread out condition and are provided so that the two airbag chambers by reducing the volume of the folding space spatially separated from each other to a gas bag package are foldable.

Of the The advantage of spatially separated folding is above all in that the folding of a gas bag chamber in a subspace no Has effect on the folding process in the other subspace.

Especially Preferably, the release agent is adapted to the two subspaces completely separate from each other. Since the two airbag chambers are connected to each other, is a recess on the release agent provided by the one the two airbag chambers each other connecting connecting region of the airbag from a subspace is guided in the other subspace, with the recess or the release agent is such that the connection area can be fixed in the recess. In particular, the connection area be tightly enclosed by the recess. This way will Ensures that moving (folding) an airbag chamber in subspace not above the connection area be transferred to the airbag chamber in the other subspace can.

Of the Faltraum is preferably formed such that a therein flat (wrinkle-free) spreading gas bag along an extension plane extends, wherein the flat spread airbag chambers of the Airbag preferably along a first, along the plane of extension extending direction opposite each other.

The Release agent is therefore longitudinal along a second direction extends formed transversely to the first direction along the Extension plane extends and preferably has two along the second direction longitudinally extending, aligned with each other Separating elements, which are preferred to form an interruption of the release agent along the second direction spaced from each other are arranged.

In the break is a placeholder can be arranged, so that the interruption preferably filled form-fitting. For this the placeholder is designed to be along a perpendicular to Extension plane oriented direction from a first position to be linearly shifted to a second position. In the first Position is the placeholder outside the break whereas in the second position it intervenes in the interruption, and preferably in such a way that the two separating elements with, respectively a free end on opposite sides of the placeholder issue. It is also possible to place the placeholder on a Forming folding space limiting top plate of the device stationary, so that it protrudes into the said interruption when the top plate in its intended, the folding space limiting Position is arranged.

Of the Wildcard is - depending on the shape of the free Ends of the two separating elements - in one along the extension plane extending cross-section, preferably cross-shaped or rectangular educated. For sliding back and forth along the second direction Separating elements, the placeholder is preferably cross-shaped in cross-section, wherein the free ends of the separating elements preferably transversely to the plane of extent have running grooves in each of the projecting areas (legs) of the cross-shaped cross-shaped spacer intervene, if it is located in the interruption. This will ensure that the dividers are not transverse to the first Direction can move when they are with their respective abut the free end on the placeholder to the folding space in the two Subdivide subspaces.

To down the fold space is preferred by a flat, along the extension plane extending lower plate limited, as Carrier (underlay) for the to be folded, flat spread airbag is furnished and provided. The Separating elements of the release agent are transverse to the substrate said level of extension, the height of the separating elements along that direction transverse to the plane of extension, the Height of the folding space defined.

In A variant of the invention is provided that the two separating elements at the lower plate respectively between a first position and a second position along the second direction back and forth are stored, wherein the two separating elements when moving out of the first position to their respective second position for dividing the Faltraumes are moved towards each other, and where they are in the second Position the interruption or rest on the placeholder, when this is arranged in its second position.

alternative For this purpose, the two separating elements can also be rigid with the Be connected to the lower plate, taking along the second direction spaced apart, so that between the two aligned with each other separating elements said interruption is formed, in which the placeholder is inserted.

To Upwards (along the vertical) is the folding space through an over the lower plate and limited to be arranged parallel to this top plate. The distance between the two plates to each other (transverse to the extension plane) determines the thickness of the airbag packages to be folded along a direction transverse to the plane extending direction. Along the in both other spatial directions is the pack size by the Travel of each slider determines and can through this be brought to a desired size.

In A variant of the invention is the placeholder on the top plate linearly displaceable, wherein the placeholder in its second Position protrudes from the top plate in the folding space. Alternatively to this The placeholder protrudes rigidly from the top plate, so that he intended arrangement of the top plate with respect engages the sub - plate in the interruption and the connection area of Airbag fixed to a module housing, which is preferred arranged in a recess formed centrally on the lower plate is and preferably one extending in the plane of the lower plate Mounting opening in the form of an open top surface has, through which along a transverse to the lower plate Direction of the folded gas bag, d. h., The two to airbag packages gathered airbag chambers, inserted into the module housing is or are, if the module housing (as intended) is arranged in the recess.

To the Receiving the airbag, the module housing has a first and a second, preferably by a gas generator from each other separate recording, wherein in the two shots each one part (Half) arranged a folded airbag chamber becomes.

In An embodiment of the invention are the two Shooting in each case divided in the middle, so that each in the two recordings arranged airbag package parts spatially can be arranged separately from each other in the module housing. hereby is an interaction of the two airbag chambers during inflation of the airbag minimized, so that the two airbag chambers during Inflate the most symmetrical behavior possible.

To the Attaching the gas bag to the module housing is the gas bag preferably fixed with a clamping ring on the module housing. To this end protrude from the clamping ring latching hooks, which when placing the Clamping ring on the open top surface of the module housing engage in corresponding recesses of the module housing, so that the clamping ring is fixed on the one hand on the module housing and on the other hand the gas bag between clamping ring and module housing is clamped. The gas bag is in an alternative variant connected to the clamping ring, for example sewn with this.

The Module housing can also be detached from the invention Device used. Another idea of the invention is therefore the provision of such a module housing. there are in such a module housing with two shots for receiving each part of a folded airbag chamber preferred the two shots each centered by a particular one piece formed with the module housing wall (subdivision) separated from each other, d. h., divided.

To the Folds of the airbag along the first direction are two along the second direction longitudinally extended first slider provided each between a first position and a second position along the first direction back and forth on the lower plate are stored, wherein the respective first slide during its movement his first position in his second position against one in each Subspace flat spread airbag chamber is pressed and pull them together while taking them with them (chaotic) Wrinkles lays.

To the subsequent folding of the airbag along the second Direction, each subspace is divided by two along the second Direction opposite second slide limited, the each between a first position and a second position along the first direction back and forth on the lower plate are stored, wherein the respective second slider in its movement his first in his second position against one in each Part space flat spread airbag chamber abuts and this when takeaway towards the opposite second slide zusammenrafft, with the gas bag chamber (chaotic) in wrinkles.

Around the gathered gas bag after folding out of the folding space or move the two subspaces into the module housing, a packing punch is provided between a first position and a second position along a transverse to the top plate Direction is slidably mounted back and forth on the top plate, allowing the packing punch to move to the second position entrains the folded gas bag and this through the open Cover surface of the module housing in that module housing suppressed.

Prefers the pack stamp is adapted to each a part of a Airbag package (airbag chamber) in the first receptacle and the other part to press into the second shot. For this purpose, the packing stamp preferably four stamp elements, each stamp element in each case a part (half) of a folded airbag chamber at Moves the movement of the pack punch in the second position and thereby shifts into the respective receptacle of the module housing.

The illustrated features and advantages of the invention are characterized by the clarified the following figures. Show it:

1 a schematic plan view of an apparatus for folding a gas bag with two separate, interconnected via a connection region gas bag chambers, which are arranged flat on a lower plate of the device, wherein the folding of the gas bag chambers by means of six sliders, which are in pairs opposite each other;

2 a schematic sectional view of the in 1 shown device along the line II-II of 1 ;

3 : a schematic, perspective view of the in the 1 and 2 shown device;

4 a schematic, perspective view of a top plate in the 1 to 3 shown device over the in the 1 to 3 to arrange arranged sub-plate;

5A : a schematic plan view of an in the 1 to 3 shown sub-plate module housing for receiving the folded airbag;

5B : a schematic side view of the in 5A shown module housing;

6A a perspective, schematic view of a clamping ring for fixing the airbag to a module housing in the 5A and 5B shown type, protrude from the clamping ring latching hook by means of which the clamping ring with the said module housing can be latched;

6B : A schematic plan view of a latching hook in the 6A kind shown;

6C a schematic sectional view of the in 6B shown latching hook along the line VIc-Vic 6B ; and

7 FIG. 2 is a schematic perspective view of a modification of FIG 5A and 5B shown module housing;

1 shows in connection with the 2 to 4 a device for folding one of two airbag chambers 2 . 3 composite airbag 1 , The device has a (rectangular) flat lower plate extending along an extension plane 30 and one above the lower plate 30 to be arranged top plate 40 on, which together with six movable, between the lower plate 30 and the top plate 40 arranged sliders 15 . 16 . 17 . 18 limit a folding space F of the device. The lower plate 30 serves as a carrier of the gas bag to be arranged thereon in a flat spread state 1 ,

The folding space F can be by means of a release agent 10 into two subspaces T and T 'divide completely (by means of the release agent 10 ) are separable from each other. The release agent 10 , as well as the said slide 15 - 18 stand along a normal to the lower plate 30 extending direction N (normal) from the lower plate 30 from. The separating element 10 as well as the slides 15 - 18 along the transverse to the lower plate 30 extending direction N equal dimensions, which define the height of the folding space F and the two subspaces T, T 'along the normal N. While the release agent 10 divided the folding space F in the two subspaces T, T ', form the slide 15 - 18 (at least in sections) a lateral boundary of the folding space F or at the subspaces T, T '.

By means of the slides 15 - 18 the volumes of the two subspaces T, T 'are independently reducible, resulting in a tightening of the therein to both sides of the release agent 10 arranged airbag chambers 2 . 3 accompanied.

So the gathered gas bag 1 then in a module housing M is displaced without unpacking again, is centered on the lower plate 30 a continuous recess 35 provided, whose cross section corresponds to a cross section of the module housing M parallel to an open top surface O of the module housing M. As a result, the module housing M is precisely along the normal N in the recess 35 insertable, so that in the intended position of the module housing M, the open top surface O, which has a mounting opening for insertion of the airbag 1 forms in the module housing M along the normal N, is arranged parallel to a plane passing through a the gas bag 1 facing top of the lower plate 30 is formed.

The two subspaces T, T 'are opposite each other along a first direction Y, which is parallel to two opposite edges of the lower plate 30 runs and are through the release agent 10 separable from each other, for this purpose along a second direction X extends longitudinally, which extends transversely to the first direction Y and, together with this, the said plane of extent spans, along which both the lower plate 30 as well as the top plate 40 extend. The release agent 10 runs over the recess 35 the lower plate 30 in the middle, leaving the recess 35 from both subspaces T, T 'of the device is accessible.

For dividing the folding space F includes the release agent 10 two longitudinally extending separating elements along the second direction X. 11 . 12 which are aligned with each other along the second direction X and movable toward and away from each other along the second direction X at the lower plate 30 are stored. For movable separators 11 . 12 , these are initially arranged sufficiently spaced apart along the second direction X, so that the gas bag 1 flat on the lower plate 30 can be spread, in such a way that on both sides of the recess 35 the lower plate 30 one airbag chamber each 2 . 3 is arranged flat, ie, each of the two subspaces T, T 'is one of the airbag chambers 2 . 3 assigned, wherein one of the two airbag chambers 2 . 3 interconnecting connection area V along the normal N above the recess 35 to come to rest.

To fix the gas bag 1 on the module housing M is a clamping ring 50 provided, with a rectangular shaped annular body 50a , from the latching hook 51 protrude, which can be locked with the module housing M. On the ring body 50a is an edge area of the airbag 1 set, which is an inflow opening of the airbag 1 or adjacent inflow openings of the gas bag chambers 2 . 3 revolves, through which both airbag chambers 2 . 3 be filled with gas. This edge area of the gas bag 1 can also be between the ring body 50a and an edge of the module housing M bordering the mounting opening O of the module housing are clamped in order to fasten the gas bag to the module housing M. The fixing of the airbag 1 on the module housing M is preferably carried out after the module housing M in the recess 35 the lower plate 30 has been introduced and preferred before the gas bag 1 is arranged flat on the lower plate or the connecting portion V is fixed with respect to the lower plate.

After arranging the airbag 1 on the lower plate 30 become the two separating elements 11 . 12 on both sides of the recess 35 along the second direction X each to an edge of that recess 35 moved up so that two free ends 11a . 12a the two separating elements 11 . 12 opposite each other, along the second direction X an interruption U of the release agent 10 define. Maybe over the recess 35 Beyond standing portions of the connecting portion V are in the process of separating elements 11 . 12 along the lower plate 30 over the recess 35 pushed. When stationary with the lower plate 30 trained dividers 11 . 12 are those separating elements 11 . 12 arranged from the outset in the said position, in whose free ends 11a . 12a to the said, mutually opposite edges of the recess 35 come close.

After the gas bag 1 so flat on the lower plate 30 has been spread (there are preferably only two gas bag layers of the airbag 1 one above the other), becomes the top plate 40 along the normal N above the lower plate 30 positioned so that the distance between the two plates 30 . 40 along the normal N through the separators 11 . 12 as well as the sliders 15 - 18 is bridged. The height of the airbag packages to be folded (gas bag chambers 2 . 3 ) is therefore determined by the distance between the two plates 30 . 40 determined along the normal N.

After that, one is on the top plate 40 along the normal N displaceably mounted placeholder P along the normal N in the interruption U introduced, whereby the two subspaces T, T 'and thus the two airbag chambers 2 . 3 be completely separated from each other. It pushes the Placeholder P the connection area V of the airbag 1 along the normal N against a part of the recess 35 arranged module housing M, wherein it may be a part arranged in the module housing M tubular gas generator G at that part. As a result, the connection area V with respect to the lower plate 30 fixed and can later fold the airbag chambers 2 . 3 not along the bottom plate 30 slip.

It is also conceivable that the placeholder P rigid from the top plate 40 protrudes, so he when arranging the top plate 40 above the lower plate 30 is introduced into the interruption U. 4 shows a perspective view of one of the lower plate 30 facing underside of the top plate 40 in which the placeholder P, as well as stamp elements S 'of a packing punch S for packing the module housing M are arranged in a retracted position and therefore do not stand beyond said underside.

For movably mounted separating elements 11 . 12 the placeholder P is preferably formed as a in cross-section (along the lower plate) is substantially cross-shaped body, ie, the placeholder P has on two opposite sides, each having a free end 11a . 12a the separator 11 . 12 facing, protruding areas 13 on, in corresponding grooves 14 the separating elements 11 . 12 can intervene positively.

By such intervention of those areas 13 into the respective groove 14 Ensures that the two dividers 11 . 12 in their respective second position, in which they contact the recess 35 can not be deflected along the first direction Y. Alternatively, especially for stationary separation elements 11 . 12 , the placeholder P may also have a simple rectangular cross-section (along the lower plate 30 ) exhibit.

After the folding space F has been subdivided into two subspaces T, T 'while fixing the connecting area V, the airbag chambers arranged flat in the two subspaces T, T' can be arranged 2 . 3 by means of the slides 15 - 18 be folded, as below using one of the two gas bag chambers 3 will be explained (the device is constructed mirror-symmetrically to a running along the separating elements mirror axis).

First, the said airbag chamber 3 whose flat spread state in the 1 is indicated by a dashed line, by means of a first slider 15 which extends longitudinally along the second direction X along an edge of the lower plate 30 is extended, in the direction of the two separating elements 11 . 12 gathered. This is the first slider 15 along the first direction Y displaceable with respect to the lower plate 30 arranged and is from a first position in which he is at the said edge of the lower plate 30 is positioned, towards the recess 35 or the separating elements 11 . 12 moved to a second position, the first slider 15 the airbag chamber 3 takes along, which thereby folds into folds.

The first slider 15 In this case, it is displaced along the first direction Y at least to the extent that it coincides with one of the recesses 35 side facing up to a along the second direction X extending edge of the recess 35 the lower plate 30 zoom ranges. As a result, the airbag chamber 3 gathered together and at the same time - along the first direction Y - above the recess 35 arranged.

Along the first direction X now corresponds to the distance between the separating elements 11 . 12 and the first slider 15 just the length of the second slider 17 . 18 that is between the first slider 15 and the dividing elements 11 . 12 along the first direction Y along and along the second direction X on both sides of the recess 35 are opposite. The two second sliders 17 . 18 be further folding the airbag chamber 3 also at least to the recess 35 moved towards each other, causing the airbag chamber 3 is also gathered along the second direction X and thereafter one along the normal N above the recess 35 arranged airbag package 3 forms, through the recess 35 through along the normal N in the module housing M can be moved. When moving the second slider 17 . 18 by means of the separating elements 11 . 12 guided along the second X direction.

Such a module housing M is in the 5A and 5B shown and has a bottom B, from which a circumferential wall W goes off, which limits an interior I of the module housing M. The interior I is in a first shot 20 and a second shot 21 divided, referring to one in the recess 35 arranged state of the module housing M - extend along the first direction Y and through one of another wall 22 surrounded chamber G 'are separated, extending between the two shots 20 . 21 extends along the first direction Y and receives the tube gas generator G. Preferably, each of the two shots 20 . 21 by means of a subdivision 60 . 61 , each of the wall W with the other wall 22 the chamber G 'connects, divided into two halves. Relative to one in the recess 35 arranged state of the module housing M extend the subdivisions 60 . 61 along the second direction X, namely below the place P or possibly below the dividing elements 11 . 12 ,

The wall W of the module housing M limits the open top surface O of the module housing M, through which the folded airbag chambers 2 . 3 can be inserted into the module housing M. Possibly. the gas generator G can also be arranged through the open top surface O in the chamber G.

The clamping ring 50 is in accordance with the 5A to 6C preferably with the further wall 22 the chamber G 'locked. For this purpose, the clamping ring 50 such that the latching hook 51 when arranging the clamping ring 50 over or on the chamber G 'against the further wall 22 be biased so that they - with at least partial relaxation - with the locking hooks 51 protruding locking lugs 52 in on the wall 22 provided recesses 70 can intervene (cf. 6C ).

7 shows a modification of the in the 5A and 5B shown module housing M, in which, in contrast to the 5A and 5B the chamber G 'is substantially cylindrical and is designed and provided to surround the tubular gas generator G at least in sections in cross-section. For arranging the tubular gas generator G in that chamber G 'is on the wall W of the module housing M with the chamber G' communicating, preferably circular opening 71 provided through which the tubular gas generator G along the first direction Y (ie along its longitudinal axis) in the chamber G 'is inserted. The chamber G 'further comprises an open-top surface O (mounting opening) facing outflow opening 72 on, through the gas released by means of the gas generator G in the inflow opening (or inflow) of the fixed to the open deck O airbag 1 can flow in.

Furthermore, unlike the 5A and 5B the clamping ring 50 not locked with the chamber G ', but with the circumferential wall W of the module housing M, and preferably according to the in the 6C shown type.

Because the two shots 20 . 21 of the module housing M (both according to the 5A and 5B as well as after 7 ) - based on a in the recess 35 introduced state of the module housing M - extend along the first direction Y, is each of the two shots 20 . 21 accessible from half of each subspace T, T '. In particular, the airbag packages folded into gas bag packages are 2 . 3 of the gas bag 1 in each case along the normal N over the two recordings 20 . 21 arranged that each airbag chamber 2 . 3 to a part over a half of the first shot 20 and to the other part over one half of the second shot 21 is arranged, with the two halves of the shots 20 . 21 each along the second direction X opposite.

To move the two parts of each airbag package 2 . 3 in the assigned halves of the recordings 20 . 21 is at the top plate 40 a packing punch S linearly displaceable along the normal N stored, the four punch elements S ', each along the normal N over one of the four halves of the first and second recording 20 . 21 are arranged and can be driven individually or in association along the normal N down, where they each against a portion of the two airbag packages 2 . 3 and push it along the normal N so that those parts of the two airbag packages 2 . 3 in their assigned halves of the recordings 20 . 21 to be ordered.

Thereafter, the module housing M can be wrapped with an optionally evacuated envelope (cover) to the gas bag 1 to keep in its packed state, or the open top surface O are closed with a suitable cover. The thus arranged in the module housing M airbag 1 is with regard to its two airbag chambers 2 . 3 symmetrically packed, so that a symmetrical behavior of the two gas bag chambers 2 . 3 of the gas bag 1 when unfolding the airbag 1 is guaranteed.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• WO 97/10124 [0002]

Claims (49)

Method for folding a gas bag ( 1 ) for an airbag module having at least two airbag chambers ( 2 . 3 ), characterized in that each airbag chamber ( 2 . 3 ) by means of a device for folding the airbag ( 1 ) is automatically folded separately. Method according to claim 1, characterized in that each airbag chamber ( 2 . 3 ) by means of a plurality of sliders ( 15 . 16 . 17 . 18 ) is folded separately. Method according to claim 1 or 2, characterized in that each airbag chamber ( 2 . 3 ) is folded chaotically. Method according to one of the preceding claims, characterized in that - the two gas bag chambers ( 2 . 3 ) are arranged to extend flat along an extension plane and to face each other with respect to a first direction (Y) along the plane of extent, and - the two airbag chambers ( 2 . 3 ) are spatially separated from each other along the first direction (Y), so that folding of a gas bag chamber ( 2 . 3 ), the other airbag chamber ( 2 . 3 ) leaves unchanged. A method according to claim 4, characterized in that the two airbag chambers ( 2 . 3 ) by means of a release agent ( 10 ) spaced apart along a second direction (X) which is transverse to the first direction (Y). Method according to claim 5, characterized in that one of the two airbag chambers ( 2 . 3 ) interconnecting connecting region (V) of the airbag ( 1 ) in an interruption (U) of the release agent ( 10 ) is arranged. A method according to claim 6, characterized in that the interruption (U) along the second direction (X) between two along the second direction (X) longitudinally extending and aligned with each other separating elements ( 11 . 12 ) of the release agent ( 10 ) is trained. A method according to claim 7, characterized in that the connection region (V) by means of a place (P) is set, which is normal to the plane of extent of the flat-spread airbag ( 1 ) is introduced into the interruption (U). A method according to claim 8, characterized in that the two airbag chambers ( 2 . 3 ) are spatially completely separated from each other along the first direction (Y) when the placeholder (P) is inserted into the break (U). Method according to one of claims 7 to 9, characterized in that the two airbag chambers ( 2 . 3 ) by means of the separating elements ( 11 . 12 ) are spatially separated, wherein the two separating elements ( 11 . 12 ) for the spatial separation of the two airbag chambers ( 2 . 3 ) each from a first position in which the two separating elements ( 11 . 12 ) along the second direction (X) have their greatest distance from each other, in each case a second position along the second direction are linearly displaced, wherein the two separating elements ( 11 . 12 ) form the interruption (U) in their respective second position. Method according to one of claims 7 to 9, characterized in that the two airbag chambers ( 2 . 3 ) with the aid of stationary with respect to the extension plane trained separating elements ( 11 . 12 ) are spatially separated from each other. Method according to claim 5 or one of claims 6 to 11 as far back referring to claim 5, characterized in that each of the two airbag chambers ( 2 . 3 ) in each case in the first and in the second direction (X, Y) is folded. Method according to claim 12, characterized in that each of the two airbag chambers ( 2 . 3 ) in the first direction (Y) by means of at least one first slider ( 15 . 16 ) are folded together. A method according to claim 12 or 13, characterized in that each of the two airbag chambers ( 2 . 3 ) in the second direction (X) by means of two mutually parallel slides ( 17 . 18 ) is folded. Method according to Claim 5 or one of Claims 6 to 14 as far as dependent on Claim 5, characterized in that each of the two airbag chambers ( 2 . 3 ) for folding together with one transverse to the first direction (Y) extending first slide ( 15 . 16 ) along the first direction (Y) to the other airbag chamber ( 2 . 3 ) is gathered. A method according to claim 15, characterized in that after the folding of an airbag chamber ( 2 . 3 ) along the first direction (Y), that airbag chamber ( 2 . 3 ) by means of two along the second direction (X) opposite each other and along the first direction (Y) extended second slide ( 17 . 18 ) is gathered along the second direction (X). Method according to claim 16, characterized in that the second slides ( 17 . 18 ) by means of the release agent ( 10 ) are guided along the second direction (X). Method according to claim 4 or any one of claims 5 to 17 as far as dependent on claim 4, characterized in that the two folded airbag chambers ( 2 . 3 ) are pushed into a module housing (M) normal to the extension plane. A method according to claim 18, characterized in that each of the airbag chambers ( 2 . 3 ) is pressed into different areas of the module housing (M). Method according to claims 18 or 19, characterized in that the two folded airbag chambers ( 2 . 3 ) are pressed into the module housing (M) in such a way that a part of the respective airbag chamber ( 2 . 3 ) in a first recording ( 20 ) and the other part of the respective airbag chamber in a second receptacle ( 21 ) of the module housing (M) are arranged. Method according to claim 20, characterized in that the two recordings ( 20 . 21 ) by subdivisions ( 60 . 61 ) are divided. Method according to one of the preceding claims, characterized in that each separately folded airbag chamber ( 2 . 3 ) after folding into a separate receptacle or receptacle ( 20 . 21 ) is introduced. Device for carrying out the method according to one of claims 1 to 22, comprising: a folding space, which is adapted and provided to receive a gas bag to be folded into a gas bag package in a flat spread state, wherein the volume of the folding space for folding the airbag to a gas bag package can be reduced, characterized by, in the folding space (F) can be arranged release agent ( 10 ), which is adapted and intended to subdivide the folding space (F) into at least two separate subspaces (T, T '), wherein the two subspaces (T, T') accommodate one airbag chamber each ( 2 . 3 ) of a gas bag to be folded ( 1 ) are arranged and provided in a flat spread state. Device according to claim 23, characterized in that the release agent ( 10 ) is arranged and provided, the two subspaces (T, T ') completely separate from each other. Apparatus according to claim 23 or 24, characterized in that the folding space (F) for receiving the airbag to be folded ( 1 ) is provided and set up in such a way that the airbag spread flatly in the folding space (F) ( 1 ) extends along an extension plane, and that the flat spread airbag chambers ( 2 . 3 ) of the airbag ( 1 ) are opposed to each other along a first direction (Y) extending along the plane of extent. Apparatus according to claim 25, characterized in that the release agent ( 10 ) along a second direction (X) extending longitudinally, which extends transversely to the first direction (Y) in the plane of extent. Device according to claim 26, characterized in that the release agent ( 10 ) two along the second direction (X) longitudinally extending, aligned separating elements ( 11 . 12 ) having, Apparatus according to claim 27, characterized in that the separating elements ( 11 . 12 ) for forming an interruption (U) of the release agent ( 10 ) are spaced apart along the second direction (X). Device according to one of claims 25 to 28, characterized in that the release agent ( 10 ) comprises a placeholder (P) arranged and arranged to be linearly displaced along a normal of the extension plane from a first position to a second position, the placeholder (P) being located in the first position outside the break (U) is engaged in the second position in the interruption (U), so that the two separating elements ( 11 . 12 ) each having a free end ( 11a . 12a ) abut on opposite sides of the spacer (P). Device according to claim 29, characterized in that the placeholder (P) has a cross-shaped cross-section is. Device according to claim 29, characterized in that that the placeholder (P) in cross section rectangular is trained. Device according to one of claims 25 to 31, characterized in that the folding space (R) by a along the extension plane extended lower plate ( 30 ), which serves as a support for a collapsible flat gas bag ( 1 ) is furnished and provided. Apparatus according to claim 27 or any one of claims 28 to 31 as far as dependent on claim 27 and claim 32, characterized in that the separating elements ( 11 . 12 ) across to Lower plate ( 30 ) stand out from this. Device according to claim 27 or 28 and one of claims 32 or 33, characterized in that the two separating elements ( 11 . 12 ) on the lower plate ( 30 ) are displaceably mounted in each case between a first position and a second position along the second direction (X), wherein the two separating elements ( 11 . 12 ) when moving from the first position to their respective second position for dividing the folding space (R) are approximated to each other. Device according to claim 27 or 28 and one of claims 32 or 33, characterized in that the two separating elements ( 11 . 12 ) rigidly on the lower plate ( 30 ). Device according to one of claims 32 to 35, characterized in that the folding space (F) by an over the lower plate ( 30 ) to be arranged and along the extension plane extended top plate ( 40 ) is limited. Device according to one of claims 29 to 31 and according to claim 36, characterized in that the placeholder (P) on the top plate ( 40 ) is movably mounted. Apparatus according to claim 32 or any one of claims 33 to 37 as far as dependent on claim 32, characterized by a module housing (M) for receiving the folded gas bag ( 1 ), which is set up and provided for, in one at the lower plate ( 30 ) centrally formed recess ( 35 ) to be arranged. Apparatus according to claim 38, characterized in that the module housing (M) has a mounting opening (O) in the form of an open top surface, through which along a direction transverse to the plane extending direction of the folded airbag ( 1 ) is insertable when the module housing (M) in the recess ( 35 ) is arranged. Apparatus according to claim 38 or 39, characterized in that the module housing (M) a first and a second by a gas generator (G) from each other separate receptacle ( 20 . 21 ) for receiving a respective part of a folded airbag chamber ( 2 . 3 ) of the airbag ( 1 ) having. Apparatus according to claim 40, characterized in that the two recordings ( 20 . 21 ) are each divided in the middle, so that the two folded airbag chambers ( 2 . 3 ) are spatially separated from each other in the module housing (M) can be arranged. Device according to one of claims 29 to 31 and according to claim 32 and any one of claims 38 to 41, characterized in that the placeholder (P) is arranged and provided, in its second position, one of the two airbag chambers ( 2 . 3 ) connecting the connecting region (V) of the gas bag ( 1 ) for fixing the airbag ( 1 ) with respect to the lower plate ( 30 ) against that in the recess ( 35 ) of the lower plate ( 30 ) to press module housing (M) arranged. Apparatus according to claim 32 or any one of claims 33 to 42 as far as dependent on claim 32, characterized by two first slides (22) extending longitudinally along the second direction (X). 15 . 16 ) which are displaceable in each case between a first position and a second position along the first direction (Y) so as to be displaceable on the lower plate ( 30 ), wherein the respective first slide ( 15 . 16 ) in the movement from its first to its second position in the respective subspace (T, T ') flat spread airbag chamber ( 2 . 3 ) takes along and pulls together. Apparatus according to claim 32 or any one of claims 33 to 43 as far as dependent on claim 32, characterized in that each subspace (T, T ') has two second slides (FIG. 2) opposite each other along the second direction (X) ( 17 . 18 ), which in each case can be displaced back and forth between a first position and a second position along the second direction (X) on the lower plate ( 30 ) are mounted, wherein the respective second slide ( 17 . 18 ) in its movement from its first to its second position in the respective subspace (T, T ') flat spread airbag chamber ( 2 . 3 ) and in the direction of the opposite second slider ( 17 . 18 ) zusammenrafft. Device according to one of claims 36 or 37 and according to claim 38 or one of claims 39 to 44 as far back referred to claim 38 characterized by a packing punch (S) for pressing the folded airbag ( 1 ) in the module housing (M), wherein the packing punch (S) between a first position and a second position along a transverse to the top plate ( 40 ) running direction back and forth on the upper plate ( 40 ) is mounted, so that the packing punch (S) in the movement into the second position the folded gas bag ( 1 ) and pushes it through the open top surface of the module housing (M) in the module housing (M). Apparatus according to claim 40 or 41 and according to claim 45, characterized in that the packing punch (S) is arranged and provided, in each case a part of a folded airbag chamber ( 2 . 3 ) in the first recording ( 20 ) and the other part in the second Admission ( 21 ). Device according to one of claims 45 or 46, characterized in that the packing punch (S) has four punch elements (S '), wherein each punch element (S') clearly a part of a folded airbag chamber ( 2 . 3 ) and the respective part in the movement of the packing punch (S) in the second position in the associated recording ( 20 . 21 ) of the module housing (M). Apparatus according to claim 38 or any one of claims 39 to 47 as far as dependent on claim 37, characterized by a clamping ring ( 50 ) for fixing the airbag ( 1 ) on the module housing (M). Device according to claims 38 and 48, characterized in that the clamping ring ( 50 ) Locking hooks ( 51 ), for fixing the clamping ring ( 50 ) on the module housing (M) into the mounting opening (O) of the module housing (M).