JP2003011766A - Head part protection air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head part protection air bag device capable of preventing the air bag during development, from being caught by an upper end part of a pillar garnish, and entering between the pillar garnish and a pillar with an inexpensive constitution. SOLUTION: In this head part protection air bag device provided with an inflator 14 mounted on an approximately central part in the longitudinal direction of a vehicle, and capable of supplying gas to gas passages 11b1, 11b2 (communicated with gas supply ports 11a1, 11a2) communicating with an inflating part for a front seat and an inflating part for a rear seat of an air bag 11, from the inflator 14 through a defuser pipe 13, a part P1 corresponding to the pillar garnish, of the air bag 11 in a folded state is offset to the inside in the car width direction with respect to the other part P2, and is covered by a roof head lining 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head protection airbag device mounted on a vehicle, and more particularly to an inflator arranged at a substantially central portion in the vehicle front-rear direction and an airbag of the airbag installed through a diffuser pipe. The present invention relates to a head protection airbag device configured to be able to supply gas to a gas passage that communicates with a front seat inflating portion and a rear seat inflating portion.

[0002]

2. Description of the Related Art In U.S. Pat. No. 6,099,029, an inflator is arranged at a substantially central portion in a vehicle front-rear direction, and a hose and a duct arranged in a gas passage of an airbag are provided from the inflator. There is shown a head protection airbag device configured to supply gas to the front seat inflating portion and the rear seat inflating portion of the airbag. Also, Japanese patent No. 3
In No. 082140, an inflator is arranged at an intermediate portion in the vehicle front-rear direction, and gas is supplied from the inflator to a gas passage communicating with the front seat inflating portion and the rear seat inflating portion of the airbag via a diffuser pipe. A possible head protection airbag device is shown.

[0003]

By the way, in each of the above-mentioned head protection airbag devices, the folded and accommodated airbag is inflatable and deployable in a curtain shape along the side wall in the vehicle compartment. Since gas is supplied from the central portion (intermediate portion) of the airbag to the front seat inflating portion and the rear seat inflating portion, the front seat inflating portion and the rear seat inflating portion are inflated from the front end portion or the rear end portion of the airbag. Although it is possible to shorten the time to complete the deployment of the airbag compared to the one that supplies gas to the parts, the airbag in the middle of deployment is located corresponding to the middle part of the airbag. There is a risk of getting caught in the upper end of the existing pillar garnish or slipping between the pillar garnish and the pillar.

Although the above-mentioned problems (such as catching or diving into the airbag) can be solved by providing a bag deployment guide (jump base) corresponding to the upper end of the pillar garnish, in such a case, protection of the head concerned. Since it is necessary to add a bag deployment guide to the components of the airbag device, not only the assemblability may be deteriorated, but also the cost may be increased.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention arranges an inflator at a substantially central portion in the vehicle front-rear direction, and inflates the airbag for a front seat through a diffuser pipe. In a head protection airbag device configured to be able to supply gas to a gas passage that communicates with the rear portion and the inflatable portion for the rear seat, a portion corresponding to the pillar garnish in the folded airbag is more than other portions. It is characterized in that it is arranged offset inside the vehicle width direction and is covered with a roof head lining (the invention according to claim 1). In this case, it is also possible that the pillar garnish corresponding part of the airbag is arranged inside the tip of the diffuser pipe and the other part is arranged below the tip of the diffuser pipe (the invention according to claim 2). Is.

Further, according to the present invention, an inflator is arranged at a substantially central portion in the vehicle front-rear direction, and a gas communicating from the inflator to the front seat inflating portion and the rear seat inflating portion of the airbag via the diffuser pipe. In a head protection airbag device configured to be able to supply gas to a passage, the airbag is housed along a roof side rail in a state of being folded by bellows folding in the vertical direction and covered by a roof head lining. In the pillar garnish corresponding portion of the airbag, the folding end surface faces inward in the vehicle width direction by being twisted, and the folding end surface faces downward in other portions (the invention according to claim 3). is there.

[0007]

In the head protection airbag device according to the present invention, gas is ejected from the inflator at the time of a side collision or a rollover of the vehicle, and this gas is passed through the diffuser pipe into the gas passage of the airbag. When supplied, the gas is supplied to the front seat inflating portion and the rear seat inflating portion of the airbag through the gas passage, and the airbag inflates and deploys in a curtain shape along the side wall in the vehicle compartment.

In the head protection airbag device according to the present invention (the invention according to claim 1), the portion of the folded airbag corresponding to the pillar garnish is located inward in the vehicle width direction with respect to the other portions. Because it is arranged offset, in the part corresponding to the pillar garnish of the airbag, the force to push the roof head lining when the airbag inflates and deploys is large, and the roof head lining can be easily pushed open, The airbag during deployment is hard to catch on the upper end of the pillar garnish, and it is difficult to slip between the pillar garnish and the pillar. Therefore, it is possible to effectively suppress the above-mentioned catching or diving of the airbag.

Further, in the head protecting airbag apparatus according to the present invention (the invention according to claim 1), in the folded airbag, the portion corresponding to the pillar garnish is located inside the other portion in the vehicle width direction. It can be carried out by offset placement, and since it does not require additional parts such as a bag deployment guide (jump base), it can be carried out at low cost without changing or increasing the number of constituent parts.

Further, in the head protecting airbag device according to the present invention (the invention according to claim 2), the pillar garnish corresponding portion of the airbag is arranged inside the tip of the diffuser pipe, and the other portion is the tip of the diffuser pipe. Since it is arranged on the lower side, the airbag can be positioned higher in the pillar garnish corresponding portion of the airbag, and the airbag can be brought into a state of being brought close to the vehicle compartment side wall in other portions. it can. As a result, in the portion corresponding to the pillar garnish of the airbag, the airbag which is in the process of being deployed is more difficult to be caught on the upper end portion of the pillar garnish, and it is more difficult to dive between the pillar garnish and the pillar. Further, in other parts of the airbag, the airbag can be appropriately deployed along the window glass.

Further, in the head protection airbag device according to the present invention (the invention according to claim 3), the folded end surface of the vehicle is twisted at the portion corresponding to the pillar garnish of the airbag folded by bellows folding. Since it faces the inner side in the width direction and the folded end surface faces downward in other parts, at the part corresponding to the pillar garnish of the airbag, the airbag can be deployed toward the inner side in the vehicle width direction, and At the site, the airbag can be deployed along the side wall of the vehicle compartment.

As a result, at the portion of the airbag corresponding to the pillar garnish, the force for pushing the roof head lining when the airbag is inflated and deployed is large, and the roof head lining can be easily pushed open and deployed. The airbag in the middle is unlikely to get caught in the upper end of the pillar garnish, and it is difficult to slip between the pillar garnish and the pillar. Further, in other parts of the airbag, the airbag can be quickly deployed along the window glass.

Further, in the head protecting airbag device according to the present invention (the invention according to claim 3), in the airbag folded by bellows folding, the portion corresponding to the pillar garnish is different from the other portion. It can be implemented by twisting and assembling it on the roof side rail, and since it does not require additional parts such as a bag deployment guide (jump base), it can be implemented inexpensively without changing or increasing the number of components. it can.

[0014]

BEST MODE FOR CARRYING OUT 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 vehicle of a passenger car system, and the airbag device of this embodiment is inflated in a curtain shape along a vehicle compartment side wall. Airbag 11 to deploy
A tension cloth 12 attached to the front end of the airbag 11 and the gas supply port 11a1 of the airbag 11.
The airbag module 10 includes an inflator 14 that is airtightly assembled to the 11a2 via a diffuser pipe 13.

The airbag 11 is formed of a hollow weave so that the weave direction is in the front-rear direction and the upper-lower direction. The surface of the airbag 11 is coated to maintain airtightness, and the gas supply port is provided at the upper end of the intermediate portion in the front-rear direction. 11a1 and 11a2, gas passages 11b1 and 11b2 extending in the front-rear direction from these gas supply ports 11a1 and 11a2, and these gas passages 1
Front seat inflatable portion 11 communicating with 1b1 and 11b2 at the upper end
c and the rear seat inflating portion 11d, the intermediate non-inflating portion 11e, the front end non-inflating portion 11f, and the four mounting piece portions 11g. In addition, each mounting piece portion 11g,
An attachment hole 11g1 for the roof side rail 21 is provided.

The inflatable portion 11c for the front seat includes the front seat (B pillar 2
3 protects the head (not shown) of an occupant seated on a seat (corresponding to No. 3) and has a plurality of expansion chambers (not shown) extending in the vertical direction. on the other hand,
The rear seat inflating section 11d protects the head (not shown) of an occupant seated in the rear seat, and has a plurality of vertically extending expansion chambers (cells not shown).

The tension cloth 12 is the airbag 11.
Of the uncoated woven fabric which is thinner and cheaper than the constituent fabric of FIG.
2a is sewn to the front end non-inflatable portion 11f of the airbag 11 and is attached to the mounting hole 12b1 provided in the front end portion 12b.
It is adapted to be assembled to the pillar 22 (see FIG. 1).

As shown in FIGS. 1 to 4, the diffuser pipe 13 has a T-shaped tip and has a pair of front and rear gas injection ports 13a1 and 13a2, and the gas inlet 1 at the base end.
A flare nut 15 is used to connect and fix the male screw portion 14b provided at the gas injection port 14a of the inflator 14 in an airtight and integral manner at 3b. The gas supply ports 11a1 and 11a2 of the airbag 11 are airtightly attached to the gas injection ports 13a1 and 13a2 of the diffuser pipe 13 by using a tightening band 16.

The inflator 14 is for supplying gas toward the airbag 11 at the time of a side collision or rollover of the vehicle, and a roof side is attached to the outer periphery of the inflator 14 by a bracket (not shown) previously assembled. It is assembled to the rail 21 using bolts (not shown). Further, the inflator 14 is disposed in the front-rear direction along the roof side rails 21 above the airbag 11 in a substantially central portion in the front-rear direction of the vehicle, and together with the folded airbag 11, the roof headlining 31. It is supposed to be covered by.

In the airbag device of this embodiment constructed as described above, normally, the airbag 11 and the tension cloth 12 are foldable in the vertical direction, for example, in a bellows fold so as to be multiply folded and breakable. As shown in FIG. 2, it is stored along the A pillar 22 and the roof side rail 21 in a state of being held (see FIG. 3 and FIG. 4), and by the A pillar garnish 32 and the roof headlining 31. It is covered.

When the vehicle is in a side collision or rolls over, gas is ejected from the inflator 14, and the gas is passed through the diffuser pipe 13 to each gas injection port 1.
3a1, 13a2 to each gas passage 11 of the airbag 11
When supplied to b1 and 11b2, the airbag 11 deforms the corresponding portion of the roof head lining 31 toward the interior of the vehicle and expands downward, and the tension cross 1
2 deforms the relevant portion of the A pillar garnish 32 toward the vehicle compartment and deploys it downward, and the airbag 11 inflates and deploys like a curtain along the side wall of the vehicle interior as shown in FIG. At this time, each inflating portion 11 of the airbag 11
The c and 11d inflate and deploy toward the head protection area located on the side of the head of each occupant.

By the way, in this embodiment, FIG.
As shown in FIG. 6, the portion P1 of the folded airbag 11 corresponding to the B pillar garnish 33 is arranged inside the tip of the diffuser pipe 13, and the other portion P2 is below the tip of the diffuser pipe 13. Which is located at the position P corresponding to the B pillar garnish 33.
1 is offset from the other part P2 inward in the vehicle width direction, and is covered by the roof head lining 31. The B-pillar garnish 33 is attached to the B-pillar 23 by using a clip 41 or the like, as shown in FIG.

Therefore, in this embodiment, at the pillar garnish corresponding portion P1 of the airbag 11, the airbag 11 can be positioned inside the vehicle width direction above the other portion P2, and at the other portion P2. It is possible to bring the airbag 11 close to the vehicle compartment side wall.
As a result, when the airbag 11 is inflated and deployed, the force for opening the roof head lining 31 is large, and the roof head lining 31 can be easily pushed open, while the airbag 11 in the process of being deployed has the B pillar garnish 33. It is hard to get caught in the upper end portion 33a of the and is difficult to slip into between the pillar garnish 33 and the pillar 23. Therefore, it is possible to effectively suppress the above-mentioned catching or diving of the airbag 11. Further, in the other part P2 of the airbag 11, the airbag 11 can be appropriately deployed along the window glass.

Further, in this embodiment, in the folded airbag 11, the portion P1 corresponding to the B pillar garnish 33 is offset and arranged inward in the vehicle width direction above the other portion P2. Since it is possible and does not require additional parts such as a bag unfolding guide (jump base), it can be implemented at low cost without changing or increasing the number of constituent parts.

In the above-described embodiment, as shown in FIGS. 3 to 6, the portion P1 of the folded airbag 11 corresponding to the B pillar garnish 33 is located inside the other portion P2 in the vehicle width direction. Although it was carried out so as to be arranged offset, as shown in FIG. 7 and FIG.
The folding end surface S1 faces the inner side in the vehicle width direction by being twisted by approximately 90 degrees at the B-pillar garnish corresponding portion P1 of the airbag 11 in the state of being folded by bellows folding, and the folding end surface S2 is downward at the other portion P2. It is also possible to carry out face-to-face. It should be noted that it is also possible to employ the form of FIG. 9 instead of the form of FIG. 8 for implementation.

In the embodiment shown in FIG. 7 and FIG. 8 (or FIG. 9), the folded end surface S1 is vehicle width by being twisted at the pillar garnish corresponding portion P1 of the airbag 11 in the state of being folded by bellows folding. Facing inward,
Since the folded end surface S2 faces downward in the other portion P2, the portion P corresponding to the pillar garnish of the airbag 11
In No. 1, the airbag 11 can be deployed toward the inner side in the vehicle width direction, and in the other portion P2, the airbag 11 can be deployed along the vehicle compartment side wall.

As a result, at the portion corresponding to the pillar garnish P1 of the airbag 11, the force for pushing the roof head lining 31 when the airbag 11 is inflated and deployed is large, and the roof head lining 31 can be pushed easily. At the same time, the airbag 11 being deployed is unlikely to be caught by the upper end portion 33a of the pillar garnish 33, and is unlikely to slip between the pillar garnish 33 and the pillar 23. Therefore, it is possible to effectively suppress the above-mentioned catching or diving of the airbag 11. Further, in the other part P2 of the airbag, the airbag 11 can be quickly deployed along the window glass.

Further, in this embodiment, the pillar garnish corresponding portion P1 is twisted with respect to the other portion P2 of the airbag 11 in a state of being folded by bellows and assembled to the roof side rail 21. Since it can be carried out and does not require additional parts such as a bag deployment guide (jump base), it can be carried out at low cost without changing or increasing the number of constituent parts.

Further, in the above embodiment, as shown in FIGS. 1 to 4, the airbag 11 has a pair of front and rear gas supply ports 11a1 and 11a2, and the diffuser pipe 13 is provided.
The present invention is applied to the airbag module 10 having a pair of front and rear gas injection ports 13a1 and 13a2, but the present invention is also applicable to the airbag module 10 of the embodiment shown in FIGS. 10 to 12. Is possible. In addition, in the embodiment shown in FIGS. 10 to 12, in order to hold the airbag 11 folded by bellows folding, instead of the breakable binding tape 17, a breakable sock 1 is used.
8 and a mounting bracket 19 which is rupturable and fixed to the roof side rail 21 together with the attachment piece 11g of the airbag 11.

In the airbag module 10 of the embodiment shown in FIGS. 10 to 12, the airbag 11 has a single gas supply port 11a and a single gas passage 11b for communicating the same with both inflating parts 11b and 11c. With a diffuser pipe 1
3 has a single gas injection port 13a. Also in this embodiment, the airbag 1 in the folded state
Part P corresponding to B pillar garnish 33 in 1
Since 1 is offset inward in the vehicle width direction with respect to the other portion P2, it is possible to obtain the same effect as that of the embodiment shown in FIGS.

Further, in the above embodiment, as shown in FIGS. 3 and 4, the gas supply ports 11a1 and 11a2 of the airbag 11 are arranged so as to be slightly lifted, and then the pillar garnish corresponding portion P1 is arranged. Was carried out so as to be offset inward in the vehicle width direction slightly above the other portion P2. However, as shown in FIGS. 13 and 14, the gas supply ports 11a1, 1a of the airbag 11 are
Alternatively, the pillar garnish corresponding portion P1 may be arranged so as to be offset more inward in the vehicle width direction than the other portion P2 after the 1a2 is arranged to be slightly pushed down. In this case, the airbag 11
It is also possible to offset the gas supply ports 11a1 and 11a2 in the vehicle width direction to the outer side (to move the position higher than the position in FIG. 14 to implement).

Further, in the above-described embodiment, the bag-woven bag is adopted as the airbag 11, but it is also possible to adopt a sewing bag or an adhesive (heat welding) bag. Further, in the above-described embodiment, the present invention is applied to the head protection airbag device for passenger car type vehicles, but it is also possible to appropriately change and implement the head protection airbag device for vehicles other than the passenger car type. Is.

[Brief description of drawings]

FIG. 1 is a side view schematically showing an embodiment of a head protection airbag device (which is mounted on the right side of a vehicle) according to the present invention.

FIG. 2 is a schematic side view showing a state where the airbag and the tension cloth shown in FIG. 1 are folded.

FIG. 3 is an enlarged side view of a main part of FIG.

FIG. 4 is a plan view of the portion shown in 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 sectional view corresponding to FIG. 6 showing another embodiment of the present invention.

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 cross-sectional view taken along the line XX of FIG.

12 is an enlarged cross-sectional view taken along the line YY of FIG.

FIG. 13 is a side view showing another embodiment of the portion shown in FIG.

FIG. 14 is a plan view showing another embodiment of the portion shown in FIG.

[Explanation of symbols]

10 ... Airbag module, 11 ... Airbag, 11
a1, 11a2, 11a ... Gas supply port, 11b1, 11
b2, 11b ... Gas passage, 11c ... Front seat inflating section, 11
d ... rear seat inflating part, 11e ... middle non-inflating part, 11f ... front end non-expanding part, 11g ... mounting piece part, 12 ... tension cross, 13 ... diffuser pipe, 13a1, 11a2, 1
3a ... Gas injection port, 14 ... Inflator, 21 ... Roof side rail, 22 ... A pillar, 23 ... B pillar, 31
... Roof head lining, 32 ... A pillar garnish, 33 ... B pillar garnish, P1 ... Pillar garnish corresponding part, P2 ... Other part, S1 ... Folding end surface of pillar garnish corresponding part, S2 ... Folding end surface of other part.

Claims (3)

[Claims] 1. An inflator is arranged at a substantially central portion in a vehicle front-rear direction, and gas is supplied from the inflator to a gas passage communicating with a front seat inflating portion and a rear seat inflating portion of an airbag via a diffuser pipe. In the head protection airbag device configured to be capable of supplying, a portion of the folded airbag corresponding to the pillar garnish is offset inward in the vehicle width direction with respect to other portions, and is covered by a roof head lining. A head protection airbag device characterized in that 2. The head protection airbag device according to claim 1, wherein a portion corresponding to the pillar garnish of the airbag is arranged inside a tip of the diffuser pipe, and another portion is below a tip of the diffuser pipe. A head protection airbag device characterized by being arranged. 3. An inflator is arranged at a substantially central portion in a vehicle front-rear direction, and gas is supplied from the inflator through a diffuser pipe to a gas passage communicating with an inflatable portion for a front seat and an inflatable portion for a rear seat of an airbag. In a head protection airbag device configured to be capable of supplying, the airbag is housed along a roof side rail in a state of being folded by bellows folding in the vertical direction and covered with a roof head lining. The head protection airbag device, characterized in that the folded end surface faces the inner side in the vehicle width direction by being twisted at the pillar garnish corresponding portion, and the folded end surface faces downward at the other portions.