JP3671874B2 - Head protection airbag device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a head protection airbag device equipped in a vehicle, and in particular, an inflator is disposed at a substantially central portion in the vehicle front-rear direction, and the front seat inflating portion and the rear portion of the airbag are passed through a diffuser pipe. The present invention relates to a head protecting airbag device configured to be able to supply gas to a gas passage communicating with a seat inflating portion.
[0002]
[Prior art]
In U.S. Pat. No. 6,099,029, an inflator is disposed at a substantially central portion in the vehicle front-rear direction, and gas is passed from the inflator through a duct disposed in a gas passage between a hose and an airbag. A head protection airbag device configured to be able to be supplied to the front seat inflating portion and the rear seat inflating portion is shown. In Japanese Patent No. 3082140, an inflator is disposed in an intermediate portion in the vehicle longitudinal direction, and the inflator communicates with the front seat inflating portion and the rear seat inflating portion via a diffuser pipe. A head protection airbag device configured to be able to supply gas to a gas passage is shown.
[0003]
[Problems to be solved by the invention]
By the way, in each of the head protection airbag devices described above, the airbag that is folded and stored can be inflated and deployed in a curtain shape along the side wall of the vehicle interior, and is forward from the central portion (intermediate portion) of the airbag. Since gas is supplied to the inflatable portion for the seat and the inflatable portion for the rear seat, gas is supplied to the inflatable portion for the front seat and the inflatable portion for the rear seat from the front end portion or the rear end portion of the airbag. Although it is possible to shorten the time until the airbag deployment is completed, the airbag in the middle of deployment may be caught by the upper end of the pillar garnish arranged corresponding to the middle portion of the airbag. There is a risk of sinking between the pillar garnish and the pillar.
[0004]
The above-described problems (airbag catching and sinking) can be solved by providing a bag deployment guide (jump table) corresponding to the upper end of the pillar garnish. It is necessary to add a bag unfolding guide to these components, which may deteriorate the assembling property and also increase the cost.
[0005]
[Means for Solving the Problems]
In order to address the above-described problems, the present invention arranges an inflator at a substantially central portion in the vehicle longitudinal direction, and from the inflator to a front seat inflating portion and a rear seat inflating portion via a diffuser pipe. In the head protection airbag device configured to be able to supply gas to the communicating gas passage, the portion corresponding to the pillar garnish in the folded airbag is offset inward in the vehicle width direction from the other portions. It is characterized by being covered with a roof head lining (invention according to claim 1). In this case, it is also possible that the pillar garnish-corresponding portion of the airbag is disposed inside the tip of the diffuser pipe and the other portion is disposed below the tip of the diffuser pipe (the invention according to claim 2). It is.
[0006]
In addition, the present invention provides an inflator at a substantially central portion in the vehicle front-rear direction, and gas is passed from the inflator to a gas passage communicating with the front seat inflating portion and the rear seat inflating portion via the diffuser pipe. In the head protection airbag device configured to be capable of supplying the airbag, the airbag is housed along the roof side rail in a state of being folded by bellows folding in the vertical direction and covered with a roof head lining. The folding end surface of the bag is twisted at the portion corresponding to the pillar garnish so that the folding end surface faces inward in the vehicle width direction, and the folding end surface faces downward at the other portion (invention according to claim 3).
[0007]
[Operation and effect of the invention]
In the head protection airbag apparatus according to the present invention, when a gas is ejected from the inflator at the time of a side collision or rollover of the vehicle, and this gas is supplied to the gas passage of the airbag through the diffuser pipe, this gas Gas is supplied to the front seat inflatable portion and the rear seat inflatable portion of the airbag through the passage, and the airbag is inflated and deployed in a curtain shape along the side wall in the vehicle interior.
[0008]
By the way, in the head protection airbag device according to the present invention (the invention according to claim 1), the portion corresponding to the pillar garnish in the folded airbag is offset from the other portion on the inner side in the vehicle width direction. Therefore, at the part corresponding to the pillar garnish of the airbag, the force that pushes the roof head lining when the airbag is inflated and deployed is large, and the roof head lining can be easily pushed and opened. The airbag is not easily caught on the upper end portion of the pillar garnish, and is difficult to sink between the pillar garnish and the pillar. Therefore, it is possible to effectively suppress the above-described catching and sinking of the airbag.
[0009]
In the head protection airbag device according to the present invention (the invention according to claim 1), in the folded airbag, the portion corresponding to the pillar garnish is offset from the other portion on the inner side in the vehicle width direction. This eliminates the need for additional parts such as a bag deployment guide (jump base), and thus can be implemented at low cost without changing or increasing the number of components.
[0010]
In the head protection airbag device according to the present invention (the invention according to claim 2), the pillar garnish-corresponding portion of the airbag is disposed inside the tip of the diffuser pipe, and the other portion is located below the tip of the diffuser pipe. Since it is arranged, the airbag can be positioned higher in the part corresponding to the pillar garnish of the airbag, and the airbag can be brought closer to the vehicle compartment side wall in the other part. As a result, at the portion corresponding to the pillar garnish of the airbag, the airbag in the middle of deployment is less likely to be caught on the upper end portion of the pillar garnish, and it is further difficult to sink between the pillar garnish and the pillar. Moreover, in other parts of the airbag, the airbag can be appropriately deployed along the window glass.
[0011]
In the head protection airbag device according to the present invention (the invention according to claim 3), the folded end surface is inward in the vehicle width direction by being twisted at the portion corresponding to the pillar garnish of the airbag folded by bellows folding. Since the folding end face faces downward in other parts, the airbag can be deployed toward the inner side in the vehicle width direction in the part corresponding to the pillar garnish of the airbag, and the air in other parts. The bag can be deployed along the side wall of the passenger compartment.
[0012]
As a result, at the part corresponding to the pillar garnish of the airbag, the force that pushes the roof head lining when the airbag is inflated and deployed is large, and the roof head lining can be easily pushed and opened. The bag is difficult to be caught on the upper end of the pillar garnish, and is difficult to sink between the pillar garnish and the pillar. Further, at other portions of the airbag, the airbag can be rapidly deployed along the window glass.
[0013]
Further, in the head protecting airbag device according to the present invention (the invention according to claim 3), in the airbag folded in a bellows fold, the part corresponding to the pillar garnish is twisted with respect to the other part. This can be carried out by assembling to the roof side rail, and no additional parts such as a bag unfolding guide (jump table) are required, so that it can be carried out at low cost without any change or increase in the components.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show an embodiment in which the present invention is applied to a head protection airbag device for a passenger vehicle system vehicle. The airbag device according to this embodiment is inflated in a curtain shape along a side wall of a passenger compartment. The airbag 11 to be deployed, the tension cloth 12 assembled to the front end portion of the airbag 11, and the inflator 14 that is airtightly assembled to the gas supply ports 11 a 1 and 11 a 2 of the airbag 11 via the diffuser pipe 13. The airbag module 10 is provided.
[0015]
The airbag 11 is formed by bag weaving so that the weave direction is front and rear and up and down, the surface is coated with an airtight holding, and the gas supply ports 11a1 and 11a2 provided at the upper end of the intermediate part in the front and rear direction. And gas passages 11b1 and 11b2 extending in the front-rear direction from the gas supply ports 11a1 and 11a2, and a front seat expansion portion 11c and a rear seat expansion portion 11d communicating with the gas passages 11b1 and 11b2 at the upper ends. In addition, an intermediate non-expandable portion 11e, a front end non-expandable portion 11f, and four attachment piece portions 11g are provided. Each attachment piece 11g is provided with an attachment hole 11g1 to the roof side rail 21.
[0016]
The front seat inflating portion 11c protects the head (not shown) of an occupant seated in the front seat (the seat disposed corresponding to the B pillar 23), and a plurality of inflating portions extending in the vertical direction. It has a chamber (cell not shown). On the other hand, the rear seat inflating portion 11d protects the head (not shown) of an occupant seated in the rear seat, and has a plurality of expansion chambers (not shown) extending in the vertical direction.
[0017]
The tension cloth 12 is formed in a triangular shape (the shape can be changed as appropriate) by a non-coated woven fabric that is thinner and cheaper than the constituent fabric of the airbag 11, and the front end non-inflatable portion 11f of the airbag 11 is formed at the rear end portion 12a. It is sewn and is assembled to the A pillar 22 through an attachment hole 12b1 provided in the front end portion 12b (see FIG. 1).
[0018]
As shown in FIGS. 1 to 4, the diffuser pipe 13 has a T-shaped tip portion and a pair of front and rear gas injection ports 13a1 and 13a2, and an inflator 14 at the proximal gas inlet portion 13b. A flare nut 15 is used to connect and fix the male screw portion 14b provided in the gas injection port 14a in an airtight and integrated manner. Further, the gas supply ports 11 a 1 and 11 a 2 of the airbag 11 are airtightly assembled to the gas injection ports 13 a 1 and 13 a 2 of the diffuser pipe 13 using a fastening band 16.
[0019]
The inflator 14 is for supplying gas to the airbag 11 in the event of a side collision or rollover of the vehicle. The inflator 14 is attached to the roof side rail 21 with a bracket (not shown) assembled in advance on the outer periphery thereof. They are assembled using bolts or the like (not shown). Further, the inflator 14 is disposed in the front-rear direction along the roof side rail 21 above the airbag 11 in a substantially central portion in the front-rear direction of the vehicle, and the roof head lining 31 together with the airbag 11 in a folded state. It is supposed to be covered by.
[0020]
In the airbag apparatus according to this embodiment configured as described above, the airbag 11 and the tension cloth 12 are normally folded in multiple directions, for example, by bellows folding in the vertical direction, and can be broken and broken (FIG. 3). 2) and is housed along the A pillar 22 and the roof side rail 21 and covered with the A pillar garnish 32 and the roof head lining 31 as shown in FIG. Yes.
[0021]
Further, in the event of a side collision or rollover of the vehicle, gas is ejected from the inflator 14, and this gas is supplied from the gas injection ports 13a1, 13a2 to the gas passages 11b1, 11b2 of the airbag 11 through the diffuser pipe 13. Then, the airbag 11 deforms the corresponding portion of the roof head lining 31 toward the vehicle interior and deploys downward, and the tension cloth 12 deforms the corresponding portion of the A pillar garnish 32 toward the vehicle interior and moves downward. The airbag 11 is inflated and deployed in the form of a curtain along the side wall of the vehicle interior as shown in FIG. At this time, the inflatable portions 11c and 11d of the airbag 11 are inflated and deployed toward the head protection area located on the side of each occupant's head.
[0022]
By the way, in this embodiment, as shown in FIGS. 3-6, the site | part P1 corresponding to the B pillar garnish 33 in the airbag 11 of the folded state is arrange | positioned inside the front-end | tip of the diffuser pipe 13, and other The part P2 is disposed below the tip of the diffuser pipe 13, the part P1 corresponding to the B pillar garnish 33 is offset from the other part P2 inward in the vehicle width direction, and is covered by the roof head lining 31. ing. The B pillar garnish 33 is assembled to the B pillar 23 using a clip 41 or the like as shown in FIG.
[0023]
For this reason, in this embodiment, the airbag 11 can be positioned on the inner side in the vehicle width direction above the other part P2 in the pillar garnish-corresponding part P1 of the airbag 11, and the airbag 11 can be located in the other part P2. Can be brought close to the side wall of the passenger compartment. As a result, the force to push open the roof head lining 31 when the airbag 11 is inflated and deployed is large, and the roof head lining 31 can be easily pushed open, and the airbag 11 in the middle of deployment has the B pillar garnish 33. It is difficult to get caught in the upper end portion 33 a of the garnish, and it is difficult to sink between the pillar garnish 33 and the pillar 23. Therefore, it is possible to effectively suppress the above-described catching and sinking of the airbag 11. Moreover, in the other site | part P2 of the airbag 11, the airbag 11 can be appropriately developed along a window glass.
[0024]
Moreover, in this embodiment, in the folded airbag 11, the part P1 corresponding to the B pillar garnish 33 can be implemented by being offset from the other part P2 inward in the vehicle width direction. In addition, since no additional parts such as a bag deployment guide (jump table) are required, the components can be changed and increased without cost.
[0025]
In the said embodiment, as shown in FIGS. 3-6, the site | part P1 corresponding to the B pillar garnish 33 in the airbag 11 of the folded state is offsetly arranged inside the vehicle width direction rather than the other site | part P2. Although implemented as described above, as shown in FIGS. 7 and 8, the folded end surface S1 is twisted by approximately 90 degrees at the B pillar garnish-corresponding portion P1 in the airbag 11 folded by bellows folding. It can also be carried out with the folding end face S2 facing downward in the other part P2 facing inward in the vehicle width direction. Note that the embodiment shown in FIG. 9 can be adopted instead of the embodiment shown in FIG.
[0026]
In the embodiment shown in FIG. 7 and FIG. 8 (or FIG. 9), the folded end surface S1 is turned inward in the vehicle width direction by being twisted at the pillar garnish-corresponding portion P1 of the airbag 11 in the folded state of the bellows. Since the folding end surface S2 faces downward in the other part P2, the airbag 11 can be deployed toward the inner side in the vehicle width direction in the pillar garnish corresponding part P1 of the airbag 11. In the region P2, the airbag 11 can be deployed along the side wall of the passenger compartment.
[0027]
As a result, at the pillar garnish-corresponding portion P1 of the airbag 11, the force that pushes the roof head lining 31 when the airbag 11 is inflated and deployed is large, and the roof head lining 31 can be easily pushed and opened. The airbag 11 in the middle is not easily caught by the upper end portion 33 a of the pillar garnish 33, and is difficult to sink between the pillar garnish 33 and the pillar 23. Therefore, it is possible to effectively suppress the above-described catching and sinking of the airbag 11. Moreover, in the other site | part P2 of an airbag, the airbag 11 can be rapidly expand | deployed along a window glass.
[0028]
Moreover, in this embodiment, in the airbag 11 folded by bellows folding, the pillar garnish corresponding part P1 can be twisted with respect to the other part P2 and assembled to the roof side rail 21. In addition, since additional parts such as a bag deployment guide (jump base) are not required, there is no change / increase in the number of component parts, which can be implemented at low cost.
[0029]
Moreover, in the said embodiment, as shown in FIGS. 1-4, the airbag 11 has a pair of front and rear gas supply ports 11a1, 11a2, and the diffuser pipe 13 has a pair of front and rear gas injection ports 13a1, 13a2. Although the present invention is implemented in the airbag module 10 having the present invention, the present invention can be similarly implemented in the airbag module 10 of the embodiment illustrated in FIGS. 10 to 12. In addition, in embodiment shown in FIGS. 10-12, in order to hold | maintain the airbag 11 of the state folded by the bellows fold, it can replace with the breakable binding tape 17, and can break | disconnect the breakable sock 18. A mounting bracket 19 that is fixed to the roof side rail 21 together with the mounting piece 11g of the airbag 11 is employed.
[0030]
The airbag module 10 of the embodiment shown in FIGS. 10 to 12 has a single gas supply port 11a and a single gas passage 11b that allows the airbag 11 to communicate with both inflatable portions 11b and 11c. The diffuser pipe 13 has a single gas injection port 13a. Also in this embodiment, the portion P1 corresponding to the B pillar garnish 33 in the folded airbag 11 is offset from the other portion P2 on the inner side in the vehicle width direction. It is possible to obtain the same effect as the embodiment shown in FIG.
[0031]
Moreover, in the said embodiment, as shown in FIG.3 and FIG.4, after arrange | positioning so that the gas supply ports 11a1 and 11a2 of the airbag 11 may be lifted slightly, the pillar garnish corresponding | compatible site | part P1 is set to other Although it was implemented so as to be offset slightly above the portion P2 and inward in the vehicle width direction, the gas supply ports 11a1 and 11a2 of the airbag 11 were slightly pushed down as shown in FIGS. The pillar garnish-corresponding portion P1 can be offset from the other portion P2 inward in the vehicle width direction. In this case, the gas supply ports 11a1 and 11a2 of the airbag 11 may be offset from the outer side in the vehicle width direction (moved upward from the position shown in FIG. 14).
[0032]
Moreover, in the said embodiment, although the bag-woven bag was employ | adopted as the airbag 11, it is also possible to employ | adopt and implement a sewing bag and an adhesion | attachment (heat welding) bag. In the above-described embodiment, the present invention is applied to the head protection airbag device for passenger vehicle vehicles. However, the invention can be appropriately modified and applied to a vehicle head protection airbag device other than the passenger vehicle system. It is.
[Brief description of the drawings]
FIG. 1 is a side view schematically showing an embodiment of a head protecting airbag device (mounted on the right side of a vehicle) according to the present invention.
FIG. 2 is a schematic side view showing a state in which the airbag and the tension cloth shown in FIG. 1 are folded.
FIG. 3 is an enlarged side view of the main part of FIG.
4 is a plan view of the portion shown in FIG. 3. FIG.
FIG. 5 is a cross-sectional view taken along line 5-5 of FIG.
6 is a cross-sectional view taken along line 6-6 of FIG.
FIG. 7 is a cross-sectional view corresponding to FIG. 5, showing another embodiment of the present invention.
FIG. 8 is a cross-sectional view corresponding to FIG. 6 showing another embodiment of the present invention.
FIG. 9 is a cross-sectional view showing another embodiment of the portion shown in FIG.
FIG. 10 is a side view corresponding to FIG. 3, showing another embodiment of the present invention.
11 is an enlarged sectional view taken along line XX in FIG.
12 is an enlarged sectional view taken along line YY in FIG.
FIG. 13 is a side view showing another embodiment of the part shown in FIG. 3;
FIG. 14 is a plan view showing another embodiment of the portion shown in FIG. 4;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Airbag module, 11 ... Airbag, 11a1, 11a2, 11a ... Gas supply port, 11b1, 11b2, 11b ... Gas passage, 11c ... Front seat inflating part, 11d ... Rear seat inflating part, 11e ... Non intermediate Inflatable portion, 11f ... front end non-inflatable portion, 11g ... mounting piece portion, 12 ... tension cross, 13 ... diffuser pipe, 13a1, 11a2, 13a ... gas injection port, 14 ... inflator, 21 ... roof side rail, 22 ... A pillar 23 ... B pillar, 31 ... Roof headlining, 32 ... A pillar garnish, 33 ... B pillar garnish, P1 ... Pillar garnish compatible part, P2 ... Other parts, S1 ... Folded end face of pillar garnish compatible part, S2 ... Others Folding end face of the part.

Claims (3)

An inflator is arranged at a substantially central portion in the vehicle front-rear direction, and gas can be supplied from the inflator to a gas passage communicating with the front seat inflating portion and the rear seat inflating portion via the diffuser pipe. In the head protection airbag device, the portion corresponding to the pillar garnish in the folded airbag is offset from the other portion inward in the vehicle width direction and covered with a roof head lining. Head protection airbag device. 2. The head protection airbag device according to claim 1, wherein a pillar garnish-corresponding portion of the airbag is disposed inside a distal end of the diffuser pipe, and another portion is disposed below the distal end of the diffuser pipe. A head protection airbag device characterized by the above. An inflator is arranged at a substantially central portion in the vehicle front-rear direction, and gas can be supplied from the inflator to a gas passage communicating with the front seat inflating portion and the rear seat inflating portion via the diffuser pipe. In the head protection airbag device, the airbag is housed along the roof side rail in a state of being folded by bellows folding in the vertical direction and covered with a roof head lining, and the airbag corresponding to a pillar garnish In the head protection airbag device, the folding end face faces inward in the vehicle width direction by being twisted, and the folding end face faces downward in other portions.

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