JP2002308035A - Head protection airbag device - Google Patents

Abstract

(57) [Summary] [Problem] Even if the airbag during deployment and inflation rubs against the ground,
To provide a head protection airbag device capable of preventing gas leakage from an airbag. SOLUTION: The opening W is folded and stored at the upper edge side of an opening W on the inside of the vehicle so that the opening W
A head protection airbag device including an airbag 12 that is deployed and inflated to cover the airbag. The airbag 12 has a flexible airbag body 13, and a flexible cover sheet 32 disposed so as to substantially cover the outside O of the airbag body 13 when the airbag body 13 is deployed and inflated. , Is provided. The cover sheet 32 is disposed so as to be relatively movable with respect to at least the top portion of the vehicle exterior O in the inflatable portion 15 when the airbag body 13 is deployed and inflated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head protection air bag device mounted on a vehicle, and more particularly, to a head protection air bag device which is folded and stored at the upper edge of an opening inside the vehicle.
The present invention relates to a head protection airbag device that expands and inflates to cover an opening when inflation gas flows.

[0002]

2. Description of the Related Art Conventionally, as a head protection air bag device, as shown in Japanese Patent Application Laid-Open No. H11-235965, it can be deployed and inflated so as to cover an opening inside a vehicle when inflation gas flows. Some airbags include an airbag that is folded and stored at the upper edge of the periphery of an opening such as a door.

[0003] In this type of head protection airbag device, even if the outer surface of the expanded and inflated airbag comes into contact with the ground or the like and rubs when the vehicle falls (rolls over),
It is desirable that gas leaks do not occur in the airbag.

[0004] Even when protecting the outer side surface of the airbag, it is desirable that unnecessary tension is not generated at the inflation portion into which the inflation gas has flowed so that gas leakage does not occur.

[0005] It is an object of the present invention to provide a head protection airbag device capable of preventing gas leakage from an airbag even when the airbag rubs against the ground or the like during deployment and inflation. Another object of the present invention is to protect the outside of the airbag from inflating by introducing an inflation gas without causing unnecessary tension at an inflated portion of the airbag so that gas leakage does not occur. It is to provide a head protection airbag device which can be used.

[0006]

The head protection airbag device according to the present invention is provided with an airbag which is operated so as to allow inflation gas to flow in and expand and inflate when a vehicle rollover is detected. Is folded and stored at the upper edge side of the opening on the inside of the vehicle, and is deployed and inflated so as to cover the opening when the inflation gas flows in, the head protection airbag device comprising: The airbag body includes: a flexible airbag body; and a flexible cover sheet that is disposed so as to substantially cover the outside of the airbag body when the airbag body is deployed and inflated. A gas inflow portion that allows inflation gas to flow to separate the vehicle inner side wall portion and the vehicle outside wall portion from each other, and a non-inflow portion that does not allow inflation gas to flow in. Exhibition of the main body An inflatable portion is provided so as to cover the opening when inflated, and the cover sheet is arranged so as to be relatively movable with respect to at least a top portion on the vehicle outside in the inflated portion when the airbag body is deployed and inflated. It is characterized by being provided.

In another head protection airbag device having another configuration, the airbag device is folded and stored at the upper edge of the opening on the inside of the vehicle, and is expanded and inflated so as to cover the opening when inflation gas flows. A head protection airbag device provided with an airbag, wherein the airbag is arranged so as to substantially cover the airbag body having flexibility and the outside of the airbag body when the airbag body is deployed and inflated. A flexible cover sheet, wherein the airbag body is configured to allow an inflation gas to flow therein and to be inflatable so as to separate the inner side wall portion and the outer side wall portion; A non-inflow portion that does not allow the use gas to flow in. Less of Also a top portion of the exterior of the inflatable portion, so as to be relatively movable, it may be configured that is joined to the non-inlet portion of the air bag body.

Further, these cover sheets are folded and stored so that the upper end portion is joined to a non-inflow portion near the upper end portion of the airbag main body so as to be overlapped with the airbag main body. It is preferable to have a configuration.

Further, the cover sheet may have a structure in which the vicinity of the upper end and the vicinity of the lower end are joined to the non-inflow portion near the upper end and the lower end of the airbag body.

[0010] Furthermore, the cover sheet may be joined to a portion of the non-inflow portion disposed along the up-down direction.

Further, it is preferable that the cover sheet is formed integrally with the airbag body by bag weaving.

[0012]

According to the head protection airbag device of the first aspect, the airbag main body that expands and inflates by inflating gas when the rollover of the vehicle is detected, the outer side of the vehicle is flexible when the vehicle is deployed and inflated. Even if the vehicle rolls over and the outer surface of the airbag rubs against the ground or the like, the cover sheet protects the outer surface of the airbag body even if the vehicle rolls over and the vehicle is rolled over. be able to. In the head protection airbag device according to the first aspect, when the airbag body is deployed and inflated, the cover sheet is relatively movable with respect to at least the top portion of the inflatable portion on the vehicle outside. Therefore, even if the cover sheet rubs against the ground,
Unnecessary tension is not generated in the vicinity of the top portion of the expanding section, and the expanding section is not damaged.

Therefore, in the head protection airbag device of the present invention, even when the airbag that expands and inflates when the rollover is detected and rubs against the ground or the like after the rollover, gas leakage from the airbag can be prevented.

Further, in the head protection airbag device according to the second aspect, the airbag main body that expands and inflates by inflation gas flows when a side collision of the vehicle is detected, etc.
Since the outer side of the vehicle is covered with a flexible cover sheet, even if the outer side surface of the airbag interferes with a surrounding interfering object, the outer side surface of the airbag body is covered by the cover sheet. Can be protected. Further, in the head protection airbag device according to the second aspect, the cover sheet is joined to the non-inflow portion of the airbag body, not to the inflated portion, and at least to the top portion of the inflatable portion on the vehicle outside. When the airbag body is deployed and inflated, the cover sheet interferes with the surrounding interfering object and the like, so that even if the airbag body is pulled, the tensile force does not directly act on the inflatable portion. In addition, unnecessary tension does not occur.

Therefore, in the head protection airbag device according to the second aspect, unnecessary tension is not generated at the inflated portion of the airbag which is inflated and inflated by inflation gas so that gas leakage does not occur. In addition, the outer surface of the airbag can be protected.

Further, according to the structure of the third aspect, since the cover sheet is folded so as to be overlapped with the airbag body, the cover sheet is unfolded when the airbag body is inflated and inflated. The seat is deployed and inflated together with the airbag body. as a result,
When the inflation of the airbag body is completed, the outside of the airbag body can be accurately covered with the cover sheet.

Furthermore, according to the structure described in claim 4, the cover sheet is joined at the vicinity of the upper end and the vicinity of the lower end to the non-inflow portion near the upper end and the lower end of the airbag body. With this configuration, the cover sheet can reliably cover the outside of the airbag body when the airbag body completes the deployment and inflation. And, for example, even when the airbag body and the cover sheet are separately folded, the outer surface of the inflated airbag body can be reliably covered with the cover sheet. It is not necessary to particularly limit the folded shape of the cover sheet, and the degree of freedom of the folded shape of the airbag body and the cover sheet is increased.

Further, according to the structure described in claim 5, the cover sheet is joined to the non-inflow portion along the folding direction of the airbag body, so that the airbag body and the cover are joined together. At the time of the folding operation with the seat, the airbag body and the cover sheet can be integrally folded without the cover sheet and the airbag body being mutually displaced, and the folding workability is improved.

Further, according to the structure as described in claim 6, the cover sheet and the airbag body can be formed integrally, and the joining work of the cover sheet to the airbag body can be minimized. It is possible to reduce the number of manufacturing steps and cost of the airbag.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a head protection airbag device (hereinafter, abbreviated as “airbag device”) M of the embodiment, as shown in FIG. Front pillar portion F at the upper edge side edge of W
P is folded and stored over the lower edge of the roof P, the lower edge of the roof side rail RR, and the upper side of the rear pillar RP. The vehicle V is configured to include a front seat 9 and a rear seat 10, and the airbag 12 has an upper opening W on the side of the front seat 9 when deployed and inflated.
1 and the upper opening W2 on the side of the rear seat 10.

The airbag device M is an airbag 1
2, inflator 39, mounting brackets 37 and 40,
The airbag cover 8 includes a control device 45, a rollover sensor 44, and a side collision sensor 43.

As shown in FIG. 1, the inflator 39 is of a cylinder type for supplying an inflation gas to the folded airbag 12, and an inflow port 20a of the airbag 12 described later is externally provided. The inflator 39 is electrically connected to a control device 45 to be described later, and is operated by inputting an operation signal from the control device 45.

The mounting bracket 40 is made of sheet metal and sandwiches the inflator 39 having the inflow portion 20a of the airbag 12 from the outer peripheral side together with the inflow portion 20a.
It is configured to be attached to the sheet metal inner panel 2 on the body 1 side inside the rear pillar portion RP using the book mounting bolts 41.

As shown in FIGS. 1 to 3, the mounting bracket 37 is made of sheet metal and sandwiches each mounting portion 24 of the airbag 12, which will be described later. And an outer plate 37b. The inner and outer plates 37a and 37b have mounting holes 37 corresponding to the mounting holes 24a of the respective mounting portions 24.
c is penetrated. Then, the mounting bolts 38 are inserted through the mounting holes 24 a and 37 c and screwed to the nuts 2 b fixed to the peripheral edges of the mounting holes 2 a of the inner panel 2, whereby each mounting portion 24 is mounted on the inner panel 2. .

As shown in FIGS. 1 to 3, the airbag cover 8 is formed from the lower edges of the pillar garnish 4 disposed on the front pillar FP and the roof head lining 5 disposed on the roof side rail RR. It is configured. The front pillar garnish 4 and the roof head lining 5 are made of synthetic resin, and are attached and fixed to the inner panel 2 of the body 1 inside the front pillar portion FP and the roof side rail portion RR. Further, the roof head lining 5 is disposed from near the upper part of the front pillar part FP, to above the center pillar part CP, and to near the upper part of the rear pillar part RP.

The airbag 12 is manufactured by bag weaving using a polyamide yarn or the like, and has a flexible airbag body 13 and an outer side O of the airbag body 13 when the airbag body 13 is deployed and inflated. And a flexible cover sheet 32 that is arranged to cover. Note that a coating material such as silicon is applied to the outer surface side of the airbag body 13 in order to improve gas permeation resistance. This coating operation is performed after the weaving of the airbag body 13.

As shown in FIG. 4, the airbag body 13 allows the inflation gas G to flow into the inside of the airbag body 13 by separating the inner side wall portion 14a and the outer side wall portion 14b (see FIGS. 5 to 7). It comprises a gas inflow section 14 and a non-inflow section 23 into which the inflation gas G does not flow.

In the case of the embodiment, the gas inflow section 14 is provided with expansion shielding sections 15 and 17 arranged in front and behind, an inflow expansion section 20,
And a communication expanding portion 21. The front inflation shielding section 15 disposed on the front side of the vehicle V is disposed below the front side of the inflow inflation section 20, and when the airbag main body 13 is deployed and inflated, the side of the front seat 9 of the vehicle V ( Outside the car O)
Will expand so as to cover the opening W1 arranged on the upper side of the. Rear expansion shield 1 on the rear side of vehicle V
7 is disposed below the rear side of the inflow inflatable portion 20, and when the airbag body 13 is deployed and inflated, the rear seat 10 of the vehicle V
Opening W arranged on the upper side in the side of the vehicle (outside the vehicle O)
2 will be covered.

The communication inflatable portion 21 is provided below the rectangular plate portion 29c, which will be described later, so as to communicate between the lower rear end of the front inflatable shield portion 15 and the lower front end of the rear inflatable shield portion 17. On the lower edge side 13b, it is disposed in the front-rear direction along the lower edge 13b. Further, when the airbag body 13 is deployed and inflated, the top portion 21 a on the vehicle outside in the communication inflation portion 21 is movable relative to the cover sheet 32.

The inflow expansion section 20 has an inflow section 20 at the rear end side.
a. The inflow port portion 20a is formed in a substantially cylindrical shape so that its rear end is opened and protrudes from the airbag body 13. The inflow inflatable portion 20 extends linearly forward from the inflow portion 20a and is disposed above the front inflatable shielding portion 15. Further, the inflow port portion 20a is externally provided on the inflator 39 as described above.

The front and rear side expansion shielding sections 15 and 17 are partitioned by partitioning sections 28 described later, and a plurality of (four in the example in the figure) vertically elongated expansion sections 16 and 17 are respectively extended in the vertical direction.
18 are arranged. Then, each vertically elongated portion 16.
8 are juxtaposed along the front-back direction of the vehicle V. In addition, when the airbag body 13 is deployed and inflated, the top portions 16a and 18a on the outer side of the vehicle in the vertically elongated portions 16 and 18 are also provided.
Is relatively movable with respect to the cover sheet 32.

A vertically elongated portion 16D arranged on the rear end side of the front side expansion shielding portion 15 has a rectangular plate-like portion 29 to be described later.
c is in contact with the leading edge side, and the lower end 16 b is
1 communicates with the front end. And the vertical elongated portion 16D
Each of the vertically elongated portions 16A, 16B, and 16C other than the
The lower end side is closed by a lower edge side portion 25b of a peripheral edge portion 25 of the non-inflow portion 23 which will be described later, and all the vertically expanding portions 16A are closed.
The upper ends of 16B, 16C, and 16D are in communication with the inflow inflatable section 20.

A vertically elongated inflatable portion 18A disposed on the front end side of the rear inflatable shield portion 17 communicates with a lower end 18b and communicates with the inflatable portion 2A.
1 and communicate with the rear end. And the vertical elongated portion 18A
Each of the vertically elongated portions 18B, 18C, 18D other than the
A lower end side is closed by a lower edge side portion 25b of a peripheral edge portion 25 of the non-inflow portion 23, which will be described later.
The upper ends of 18B, 18C, and 18D are in communication with the inflow inflatable section 20.

The non-inflow portion 23 is configured such that the vehicle inner side wall portion 14a and the vehicle outer side wall portion 14b are connected to each other, and includes the mounting portion 24, the peripheral edge portion 25, the partition portion 28, and the plate-like portion 2.
9 is provided.

The peripheral portion 25 is formed around the gas inflow portion 14.
It is arranged at a portion in contact with the gas inflow portion 14 including the periphery of the rectangular plate portion 29c, and is densely woven so as not to cause gas leakage.

A plurality of mounting portions 24 are provided so as to protrude upward from the upper edge side portion 25a of the peripheral portion 25 and the plate portion 29 (triangular plate portions 29a and 29b) on the upper edge 13a side of the airbag body 13. In the embodiment, eight) are arranged, and the mounting bracket 37 for mounting to the inner panel 2 is fixed. Each mounting portion 24 has a mounting bolt 3
8 is opened.

The plate-like portion 29 has triangular plate-like portions 29a and 29b arranged on the front end side and the rear end side of the airbag body 13.
And a rectangular plate-like portion 29c disposed between the inflow inflatable portion 30 and the communication inflatable portion 21 between the front inflatable shield portion 15 and the rear inflatable shield portion 17. The plate-like portion 29 is set to secure the entire shape of the airbag body 13 and to reduce the volume of the gas inflow portion 14 to shorten the time until the completion of inflation. The front triangular plate portion 29a is disposed so as to protrude forward from the front edge side of the peripheral edge portion 25, and the rear triangular plate portion 29a is provided.
b is provided so as to protrude rearward from the rear edge side of the peripheral portion 25. Further, a peripheral portion 25 is also provided between the gas inflow portion 14 (each of the expansion shielding portions 15 and 17, the communication expansion portion 21, and the inflow expansion portion 21) around the rectangular plate portion 29 c.

The partitioning section 28 includes the front and rear side expansion shielding sections 15.
In the region 17, a plurality of substantially “T” -shaped members are provided in the front-rear direction of the vehicle V so as to extend upward from the lower edge side portion 25 b of the peripheral edge portion 25 to the inflow inflatable portion 20. Each partitioning section 28 partitions the inside of each of the expansion shielding sections 15 and 17 into a plurality of vertically elongated expansion sections 16 and 18 so as to make the thickness substantially uniform.
It is arranged. In addition, each partition 28 is provided with an inlet 20
a from the vicinity of a to the front of the airbag body 13, that is, from the mounting portion 24B at the rear end of the triangular plate portion 32b to the mounting portion 24F at the front end of the triangular plate portion 32a, tension is exerted in the front-rear direction. 13 is arranged such that it does not swing greatly even if it receives a pressing force on the inside I and outside O of the vehicle.

The cover sheet 32 is made of the airbag body 13.
It is formed of the same polyamide yarn, aramid fiber or the like, and has flexibility. The cover sheet 32 has a substantially rectangular shape as shown in FIG. 4 and substantially covers the outside O of the gas inflow portion 14 in the airbag body 13, and more specifically, as shown in FIGS. The gas inflow portion 14 (the front / rear side expansion shielding portions 15 and 17, the inflow expansion portion 20, and the communication expansion portion 21) except for the inflow portion 20 a in the expansion portion 20 is disposed so as to cover the entire surface.
Further, the cover sheet 32 is sewn to the airbag body 13 by sewing the upper end 32a and the upper edge side portion 25a of the peripheral edge portion 25 with a suture 33, as shown in FIGS. . That is, the cover sheet 32 has an upper end 32a.
Only is joined to the airbag body 13,
When the airbag body 13 is deployed and inflated, the vertically elongated inflatable portions 16 and 18 of the inflated front and rear inflatable shielding portions 15 and 17 are provided.
Are disposed so as to be relatively movable with respect to the top portions 16a and 18a of the vehicle outside O and the top portion 21a of the communication expansion portion 21 of the vehicle outside O.

As shown in FIGS. 2 and 3, the cover sheet 32 is folded and stored together with the airbag body 13 so as to be folded over with the airbag body 13.

The control device 45 connected to the inflator 39 receives the side collision detection signal from the side collision sensor 43 when a predetermined impact or more is applied to the side surface of the vehicle V, and determines whether the vehicle V falls. An operation signal is output to the inflator 39 when a rollover detection signal from the rollover sensor 44 such that (rollover) is predicted is input.
The side collision sensor 43, the rollover sensor 44, and the control device 45 are arranged at predetermined positions of the vehicle V and are electrically connected to each other.

Next, mounting of the airbag device M on the vehicle V will be described. First, the airbag 12 is folded. This folding is performed by flattening the airbag body 1
3 and the cover sheet 32 are overlapped with each other,
Insert the fold C between the mountain fold and the valley fold, and put the airbag body 1
3 is folded in a bellows so that the lower edge 13b side approaches the upper edge 13a (see FIGS. 2.4).

After being folded, a predetermined portion of the airbag 12 is wrapped by a breakable tape 36 (see FIG. 2) for preventing collapse, and the inflator 39, the mounting brackets 37 and 40 are attached, and the air is blown. Form a bag assembly.

Thereafter, the respective mounting brackets 37 and 40 are arranged at predetermined positions on the inner panel 2, and the respective mounting holes 24a and the like are inserted and bolts 38 and 41 are fixed, and the respective mounting brackets 37 and 40 are fixed to the inner panel 2. Then, the airbag assembly is attached to the body 1. Next, the side collision sensor 43, the rollover sensor 44, and the control device 45 are connected to the vehicle V.
And a lead wire (not shown) for inputting an operation signal extending from the control device 45 is connected to the inflator 39. Further, the front pillar garnish 4 and the roof head lining 5 are attached to the body 1, and the rear pillar garnish 6 and the center pillar garnish are provided. By attaching the airbag device 7 to the body 1, the airbag device M can be mounted on the vehicle V.

After the airbag device M is mounted on the vehicle V, the control device 45 inputs the rollover detection signal from the rollover sensor 44 and activates the inflator 39. G is discharged. Then, the inflation gas G flows forward through the inflow inflation portion 20 of the gas inflow portion 14 from the inflow portion 20a as shown by the two-dot chain line in FIG. Further, the inflation gas G
Flows downward from the inflow inflatable portion 20, and the inflatable shielding portions 15 and 17 of the airbag body 13 start to inflate while eliminating folding. Then, the airbag body 13 breaks the wrapped tape 36, and further pushes and opens the airbag cover 8 on the lower edge side of the front pillar garnish 4 and the roof head lining 5, so that the two-dot chain line in FIGS. As shown by, while projecting downward from above the openings W1 and W2, the openings W1 and W2 and the center pillar portions CP and
It expands greatly so as to cover the inside I of the rear pillar portion RP. At the same time as the deployment and inflation of the airbag body 13, the cover sheet 32 is deployed, and as shown by the two-dot chain line in FIGS.
Outside O of the vehicle.

That is, in the airbag device M of the embodiment, the airbag body 13 that expands and inflates by inflating gas when the rollover of the vehicle V is detected detects the outside O of the vehicle during deployment and inflation. Since the vehicle V is rolled over and the surface of the vehicle outside O of the airbag 12 rubs against the ground or the like, the vehicle outer wall of the airbag body 13 is covered by the cover sheet 32 because the vehicle V is rolled over. Part 14b
(The outer side of the vehicle) can be protected. Further, in the airbag device M of the embodiment, when the airbag body 13 is deployed and inflated, the cover sheet 32 is provided with at least the top portions 16a, 18a. Since the cover sheet 32 is relatively movable with respect to the ground or the like, even if the cover sheet 32 is rubbed against the ground or the like, unnecessary tension is generated in the vicinity of the top portions 16a, 18a, and 21a of the vertically elongated portions 16 and 18 and the communication expanded portion 21. Does not occur, and does not damage each of the vertically expanding portions 16 and 18 and the communication expanding portion 21.

Therefore, in the airbag apparatus M of the embodiment, when the rollover is detected, the airbag 1 that is deployed and inflated is inflated.
Even if 2 rubs against the ground or the like after rollover, gas leakage from airbag 12 can be prevented.

Of course, in the airbag device M of the embodiment,
When the control device 45 receives the side collision detection signal from the side collision sensor 43, it also operates the inflator 39. In this case, the airbag body 13 is also expanded and inflated, and at the same time, the cover sheet is 32 is deployed so as to cover the vehicle outside O of the inflated airbag body 13.

In the airbag device M of the embodiment, the cover sheet 32 is not the inflated portion of the airbag main body 13 (each of the vertically elongated inflated portions 16 and 18 and the communication inflow portion 21).
At least each longitudinally expanding portion 1 is joined to the non-inflow portion 23.
6 and 18 and the top portion 16a, 18a, and 21a of the vehicle outside O in the communication inflow portion 21 can be relatively moved. Even if it is pulled, for example, by interfering with each other, the tensile force does not directly act on each of the longitudinally expanding portions 16 and 18 and the communication inflow portion 21, so that each of the vertically expanding portions 1
Unnecessary tension does not occur in 6.18 and the communication inflow section 21.

Therefore, in the airbag device M of the embodiment, the inflatable gas G is caused to flow in so as to prevent gas leakage from occurring.
The surface of the airbag 12 on the vehicle outside O can be protected without generating unnecessary tension on the airbag 18 and the communication inflow portion 21.

Further, in the airbag device M of the embodiment, since the cover sheet 32 is folded so as to be overlapped with the airbag body 13, the cover sheet 32 is unfolded when the airbag body 13 is deployed and inflated. 32 is
The airbag body 13 is integrated and expanded and inflated. As a result, when the inflation of the airbag body 13 is completed, the outside O of the airbag body 13 can be covered with the cover sheet 32 accurately.

In the above embodiment, the upper end 32a of the cover sheet 32 is sewn to the upper edge 25a of the peripheral portion 25, which is the non-inflow portion 23 of the airbag body 13, and the cover sheet 32 is joined to the airbag body 13. However, the joining portion of the cover sheet 32 to the airbag body 13 is not limited to this, and the airbag 12A is configured as shown in FIG.
As shown in 9, the upper end 32 a and the lower end 32 b of the cover sheet 32 are joined to the upper edge 25 a and the lower edge 25 b of the peripheral edge 25 which is the non-inflow portion 23 of the airbag body 13. May be used. Specifically, in the airbag 12A, the upper end 32a of the cover sheet 32 and the upper edge 25a of the peripheral portion are sewn with a suture 33, and the lower end 32b and the lower edge 25b are sewn with the suture 33. The cover sheet 32 is sewn to the airbag body 13.

When the airbag 12A is configured as described above, when the airbag body 13 has completed deployment and inflation,
The cover sheet 32 can reliably cover the outside O of the airbag body 13. Then, for example, as shown in FIG. 10, even when the airbag body 13 and the cover sheet 32 are separately folded, the surface of the airbag body 13, which has been inflated, on the vehicle outside O is covered with the cover sheet 32. Since the airbag body 13 and the cover sheet 32 can be reliably covered, there is no need to particularly limit the folded shape of the airbag body 13 and the cover sheet 32, and the degree of freedom of the folded shape of the airbag body 13 and the cover sheet 32 increases. Of course, this airbag 1
Even in the case of 2A, the airbag body 13 and the cover sheet 32 may be integrally folded in a bellows and stored.

As shown in FIGS. 11 and 12, the airbag 12B has a configuration in which the cover sheet 32 is joined to a portion of the non-inflow portion 23 of the airbag body 13 which is disposed along the vertical direction. May be used.
Specifically, the airbag 12 </ b> B connects the front end 32 c and the rear end 32 d of the cover sheet 32 to the front edge side 2 of the peripheral edge 25.
5c and the trailing edge side portion 25d are sewn using a suture 33, respectively, and the intermediate portion 32e of the cover sheet 32 is sewn.
Is sewn in the vicinity of the intermediate portion of the rectangular plate-like portion 29c using the suture thread 33 so that the sewn portion is substantially parallel to the vertical direction, and the cover sheet 32 is sewn to the airbag body 13. Configuration.

If the airbag 12B has the above-described configuration, the cover sheet 32 is moved along the direction in which the airbag body 13 is folded along the non-inflow portion 23 (the front edge side portion 25c, the rear edge side portion 25d, and the rectangular plate shape). Therefore, the cover sheet 32 and the airbag body 13 are not displaced from each other during the folding work of the airbag body 13 and the cover sheet 32, so that the airbag body 13 And the cover sheet 32 can be integrally folded, and the folding workability is improved. The non-inflow portion 32 to which the cover sheet 32 is sewn is formed by the front edge side portion 25c.
It is not limited to the trailing edge side portion 25d and the rectangular plate portion 29c, but may be configured to be sewn to the partition portion 28.
Further, in the above embodiment, the cover sheet 32 and the airbag body 13 are sewn at three places, but the number of sewn places is not limited to this, and the cover sheet 32 may be sewn.
It is good also as a structure sewn on the airbag main body 13 at two places of the front edge 32c and the rear edge 32d. However, from the viewpoint of the folding workability between the airbag body and the cover sheet 32, it is preferable to sew at three or more places.

It should be noted that the airbag 12 of each embodiment described above
In 12A and 12B, the joining of the cover sheet 32 to the airbag body 13 is performed by sewing with the use of the suture thread 33. However, the joining means of the two is not limited to this. May be welded using a high-frequency welder or the like, or may be bonded using an adhesive or the like.

In addition, the airbag 12 of each of the above embodiments is used.
12A and 12B, the cover sheet 32 and the airbag body 13 are formed separately, but the airbag 12C
Alternatively, the cover sheet 32 may be integrally formed with the airbag body 13 by bag weaving. Specifically, as shown in FIG. 13A, an airbag component 47 having the same outer shape as that of the above-described airbag 12 is formed by three-layer bag weaving. At this time, the base cloth 47a forming the cover sheet 32 and the base cloths 47b and 47c forming the airbag body 13 are separated from the upper, lower, front and rear edge side parts 25a, 25b, 25c and 25d of the peripheral part 25.
In, it is joined. Then, as shown in FIG. 13B,
Under / front / rear edge sides 25b / 25c / 25d of base cloth 47a
The surrounding area (in the illustrated example, the area near the joining area with the woven area 47e) is cut to form the cover sheet 32, and the remaining base cloths 47b and 47c and the woven areas 47d and 47 woven by the bag.
As shown in FIG. 13C, a coating material such as silicon is applied to the outer surface side of e, and a coating layer 48 is formed to form the airbag body 13.
The airbag 12C in which the upper end 32a of the airbag main body 13 is joined to the upper edge side portion 25a of the peripheral portion 25 which is the non-inflow portion 23 of the airbag body 13 can be manufactured.

If the airbag 12C is configured as described above, the cover sheet 32 and the airbag body 13 can be formed integrally, and the work of joining the cover sheet 32 to the airbag body 13 is minimized. Thus, the number of manufacturing steps and cost of the airbag 12C can be reduced. Of course, in the airbag 12C,
The joining portion of the cover sheet 32 to the airbag body 13 is not limited to the upper end, and is joined at the upper end side and the lower end side, or at the front end side and the rear end side, similarly to the above-described airbags 12A and 12B. It may be configured.

Further, an airbag may be manufactured by using a band-shaped airbag material 51 as shown in FIGS. The airbag material 51 is disposed between two band-shaped airbag body forming portions 53, 53 arranged side by side in the width direction and the airbag body forming portions 53, 53 so that the two sheets overlap. Band-shaped cover sheet forming section 52 to be arranged
52, and is woven along the longitudinal direction. The airbag body 53a is connected to the airbag body forming section 5.
It is manufactured by weaving a predetermined portion of 3.53 with a bag weave. In the embodiment, the airbag bodies 53a of the respective airbag body forming portions 53 are arranged and manufactured so as to be symmetrical in the width direction of the airbag material 51.
In each of the cover sheet forming portions 52, a cover sheet 52a corresponding to the airbag body 53a arranged on one side in the width direction is woven by a bag. Each airbag body 53a and the cover sheet 52a are formed by joining the upper edge side of the mounting portion 24 projecting upward from the upper edge side portion 25a of the peripheral edge portion 25.

The airbag main body forming portions 53
After weaving a predetermined portion of the airbag main body 53a and the cover sheet forming portion 52 by bag weaving, the airbag body 53a and the cover sheet 52a located on the outside O of the vehicle are cut off. Then
By providing a coating layer on the outer surface of the airbag body 53a, an airbag can be manufactured.

Further, in the airbag device of the present invention,
You may use the airbag formed by the bag weave which consists of three base fabrics. When the airbag is configured as described above, two base cloths including the base cloth at an intermediate position are formed as an airbag main body that inflates by flowing an inflation gas, and the airbag main body is disposed on the vehicle outside. The base cloth disposed on O serves as a cover sheet. Also in this airbag, since the base fabrics are joined at the non-inflow portion, the base fabric as a cover sheet disposed on the vehicle outside and the outside of the vehicle constituting the inflated portion of the airbag body are formed. The base fabric is relatively movable at least at the top portion on the vehicle outside at the inflated portion when inflated.

In the above embodiment, the cover sheet 32 is joined and fixed to the airbag body 13, but the cover sheet 32 is inflated and completed.
3 is not particularly limited as long as it covers the vehicle outer side O. For example, the cover sheet 32 and the mounting portion 24 of the airbag body 13 are attached together with the mounting bracket 3.
A configuration may be adopted in which the device is attached to the inner panel 2 (body 1) via the connector 7. Of course, the cover sheet 32 is not limited to the mounting portion of the mounting bracket 37, and may be configured to be separately mounted to another portion of the body using bolts or the like.

Further, in the above embodiment, the airbag body 13 is formed by a bag weave, but the airbag body 13 may be manufactured by sewing, bonding, welding using a high frequency welder, or the like. Good.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing a use state of a head protection airbag device according to an embodiment of the present invention, as viewed from the inside of a vehicle.

FIG. 2 is a schematic enlarged cross-sectional view taken along a line II-II in FIG.

FIG. 3 is a schematic enlarged sectional view of a III-III part of FIG. 1,
FIG. 3 is a diagram showing a deployed and inflated state of the airbag by a two-dot chain line.

FIG. 4 is a front view showing a state in which the airbag used in the embodiment is deployed flat.

5 is a partially enlarged cross-sectional view showing a state where the airbag of the embodiment is inflated by itself, and shows a state where a VV portion in FIG. 4 is inflated.

6 is a partially enlarged cross-sectional view showing a state in which the airbag of the embodiment is inflated by itself, and shows a state in which a VI-VI portion in FIG. 4 is inflated.

FIG. 7 is a partially enlarged cross-sectional view showing a state where the airbag of the embodiment is inflated by itself, and shows a state where a portion VII-VII in FIG. 4 is inflated.

FIG. 8 is a front view showing a state in which an airbag used in another embodiment is flatly deployed.

FIG. 9 is a partially enlarged cross-sectional view showing a state where the airbag shown in FIG. 8 is inflated by itself, and shows a state where an IX-IX portion in FIG. 8 is inflated.

10 is a schematic cross-sectional view showing a state in which the airbag body and the cover sheet are separately folded and stored in the airbag shown in FIG.

FIG. 11 is a front view showing a state in which an airbag used in still another embodiment is flatly deployed.

12 is a partially enlarged cross-sectional view showing a state in which the airbag shown in FIG. 11 is inflated by itself, and shows a state in which the XII-XII portion in FIG. 11 is inflated.

FIG. 13 is a schematic view showing a method of manufacturing an airbag according to still another embodiment.

FIG. 14 is a schematic view showing a method of manufacturing an airbag according to still another embodiment.

FIG. 15 is an enlarged sectional view of a portion XV-XV in FIG. 14;

[Explanation of symbols]

 12, 12A, 12B, 12C: airbag, 13: airbag body, 14: gas inflow portion, 14a: vehicle inner side wall portion, 14b: vehicle outer side wall portion, 15: front side inflatable shielding portion, 16: vertically elongated inflatable portion, 16a ... Top part (of the vertical expansion part), 17 ... Rear expansion shielding part, 18 ... Vertical expansion part, 18a ... Top part (of the vertical expansion part), 21 ... Communication expansion part, 21a ... Top of the communication expansion part 23, non-inflow portion, 25, peripheral edge, 25a, upper edge side (of the peripheral edge), 25b, lower edge side of the peripheral edge, 25c, front edge side (of the peripheral edge), 25d, (peripheral edge) 29) plate-like portion, 29c ... rectangular plate-like portion, 32 ... cover sheet, 32a ... upper end (of cover sheet), 32b ... lower end (of cover sheet), 32c ... (of cover sheet) Front end, 32d ... (of cover sheet) Rear end, 32e: Intermediate part (of cover sheet), 33: Suture, V: Vehicle, W (W1, W2): Opening, M: Head protection airbag device.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroyuki Takahashi 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation F-term (reference) 3D054 AA18 AA20 CC04 CC11 CC27 CC29 FF02

Claims (6)

[Claims] 1. An airbag which is operated so as to flow an inflation gas to expand and inflate when a rollover of a vehicle is detected, wherein the airbag is folded toward an upper edge side of an opening inside the vehicle. A head protection airbag device that is housed and configured to expand and inflate so as to cover the opening when the inflation gas flows in, wherein the airbag has a flexible airbag body,
A flexible cover sheet disposed so as to substantially cover the vehicle exterior of the airbag body when the airbag body is deployed and inflated. A gas inflow portion that can be inflated so as to separate the inner side wall portion and the outer side wall portion from each other, and a non-inflow portion that does not allow inflation gas to flow in, wherein the gas inflow portion expands the airbag body. An inflating portion disposed so as to cover the opening when inflated, wherein the cover sheet has a top portion on the vehicle exterior side in at least the inflating portion when the airbag body is deployed and inflated;
A head protection airbag device, which is provided so as to be relatively movable. 2. A head protection airbag device comprising an airbag which is folded and stored at an upper edge side of an opening on the inside of a vehicle and which is deployed and inflated so as to cover the opening when inflation gas flows. The airbag, a flexible airbag body,
A flexible cover sheet disposed so as to substantially cover the vehicle exterior of the airbag body when the airbag body is deployed and inflated. A gas inflow portion that can be inflated so as to separate the inner side wall portion and the outer side wall portion from each other, and a non-inflow portion that does not allow inflation gas to flow in, wherein the gas inflow portion expands the airbag body. An inflating portion disposed so as to cover the opening when inflated, wherein the cover sheet has a top portion on the vehicle exterior side in at least the inflating portion when the airbag body is deployed and inflated;
A head protection airbag device, which is joined to the non-inflow portion of the airbag body so as to be relatively movable. 3. The cover sheet is folded and stored in such a manner that an upper end portion thereof is joined to a portion of the non-inflow portion near an upper end portion of the airbag main body so as to overlap with the airbag main body. 3. The head protection airbag device according to claim 1, wherein 4. The airbag according to claim 1, wherein the cover sheet has an upper end portion and a lower end portion joined to the non-inflow portion near the upper end and the lower end of the airbag body. The head protection airbag device as described in the above. 5. The head protection airbag device according to claim 1, wherein the cover sheet is joined to a portion of the non-inflow portion disposed along a vertical direction. 6. The head protection airbag device according to claim 1, wherein the cover sheet is formed integrally with the airbag body by bag weaving. .