JP2003034209A - Airbag device for head protection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an airbag device for head protection which suppresses an increase in the number of assembling parts and regulates the movement of an airbag completely inflated for development to the outside of a vehicle easily. SOLUTION: The airbag device M1 for head protection is housed by being folded at the peripheral end of a window SW of the vehicle V1 and is provided with the airbag 13 which is inflated for development covering the window by an inflow of gas for inflation. The airbag 13 is provided with a body part 14 which is inflated for development by the inflow of gas for inflation and a support 30 which is arranged outside of the vehicle of the body part when development inflation is completed and regulates the movement of the body part to the outside of the vehicle. The support 30 is connected to the body part 14 and the peripheral end RR of the window. The support 30 is housed by being folded at the peripheral end of the window SW with the body part 14, drawn out from the peripheral end of the window SW and given tension by the body part 14 which is in the middle of development inflation, and supports the outside of the vehicle of the body part 14.

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 provided with an airbag which is folded and accommodated around the periphery of a window of a vehicle and expands and inflates so as to cover the window when inflating gas flows in. More particularly, the present invention relates to a head protection airbag device having a structure in which a main body of an airbag that is inflated by inflating an inflation gas is restrained from moving to the outside of the vehicle by a support portion.

[0002]

2. Description of the Related Art Heretofore, as a head protection airbag device of this type, there has been one in which a belt-shaped support member is used to support an airbag, which has been inflated and inflated, so as not to move to the outside of the vehicle. See Kaihei 5-193430).

The reason why the airbag is supported by a support member to restrict the movement of the airbag to the outside of the vehicle is to enhance the performance of restraining the occupant by the airbag.

[0004]

However, the support member described in the above publication is formed separately from the airbag, and can support the airbag by utilizing the pretensioner when the airbag is inflated and deployed. It was placed outside the airbag.

Therefore, as an airbag device, in addition to an inflator for inflating the airbag, a drive source for deploying the support member is required, which increases the number of parts to be mounted on the vehicle, which makes mounting on the vehicle troublesome. Was there.

The present invention has been made to solve the above-mentioned problems, and it is possible to suppress the increase in the number of constituent parts and to simply and conveniently regulate the movement of the airbag, which has been inflated and expanded, to the outside of the vehicle. An object is to provide an airbag device.

[0007]

A head protection airbag apparatus according to the present invention is folded and housed in the periphery of a window of a vehicle and expands and inflates so as to cover the window when inflating gas flows in. An air bag is provided, the air bag is provided with a main body portion for inflating by inflowing the inflating gas, and is arranged outside the vehicle body of the main body portion when the expansion and inflation are completed, and the main body portion moves to the outside of the vehicle. A head protection airbag device configured to include a support portion that regulates the body portion, the support portion being connected to the main body portion and the peripheral edge of the window, and the peripheral portion of the window together with the main body portion. It is folded and housed in the housing, and is arranged so as to be extended from the peripheral edge of the window and tensioned by the main body portion at the time of expansion and expansion so as to support the vehicle exterior side of the main body portion. Is characterized by.

Then, the main body portion has its upper edge side fixed at the time of completion of expansion and expansion to the upper edge of the window peripheral edge, and one end in the front-rear direction is a vertical edge arranged substantially in the vertical direction of the window peripheral edge. In the case of being configured to be expanded and inflated downward from the upper edge side of the window peripheral edge when fixed and fixed to, the supporting portion,
One end side away from the vertical edge side is fixed to the upper edge side of the window peripheral edge, and the other end side extending to the vertical edge side is connected to the vehicle outer side near the intermediate portion in the front-rear direction of the main body portion, A lateral contraction inflating portion that expands so as to contract in the front-rear direction so that tension can be applied to the supporting portion when the inflation gas flows in is provided at the portion closer to the vertical edge than the connecting portion with the supporting portion, You may comprise.

Further, the support portion may be arranged such that the length dimension flatly developed is shorter than the length dimension when the support portion is unrolled due to the expansion and expansion of the main body portion. desirable.

Further, a lateral expansion portion, which expands in a rod shape along the front-rear direction when the expansion gas flows in, is arranged at a support side portion of the main body portion supported by the support portion. Is desirable.

Further, when the expansion gas flows in, a supporting side portion of the main body portion supported by the supporting portion is separated from the end side of the main body portion, which is separated from the vertical edge side along the front-rear direction, It is desirable to dispose an L-shaped expanding portion that expands toward the lower edge side.

[0012]

In the head protecting airbag apparatus according to the present invention, when the main body of the airbag is inflated by inflating the inflation gas, the supporting portion is extended from the periphery of the window together with the main body of the airbag. Then, tension is applied to support the outside of the body of the vehicle. Then, the support portion can be extended from the storage portion by simply connecting it to the peripheral edge of the window and the main body portion without any drive source.

Therefore, in the head protection airbag device according to the present invention, an increase in the number of constituent parts can be suppressed and the head protection airbag device can be simply and easily
The support portion can restrict the movement of the airbag, which has been inflated and expanded, to the outside of the vehicle.

Further, in the case of the constitution as set forth in claim 2, the supporting portion does not support the outside of the vehicle at a portion on the vertical edge side of the window peripheral edge with respect to the connecting portion of the main body portion with the supporting portion, It will be the non-support side part. However, the main body portion fixes the upper edge side at the time of completion of expansion and expansion to the upper edge of the window peripheral edge, and
One end in the front-rear direction is fixed to a vertical edge that is arranged substantially vertically in the peripheral edge of the window, and is configured to expand and inflate downward from the upper edge side of the peripheral edge of the window when expanded and inflated. A lateral contraction expansion part that expands so as to contract in the front-rear direction so that tension can be applied to the support part when the expansion gas flows in is provided in the part on the vertical edge side of the connection part (that is, the non-support side part). There is. Therefore, if the non-supporting side portion of the main body part inflates the lateral contraction expanding portion by inflating the expansion gas, it applies a tension in the front-rear direction to the support portion, and the non-supporting side portion also extends in the front-rear direction. Will cause tension.

As a result, the non-support side portion of the main body portion, which is not supported on the vehicle exterior side by the support portion, also generates tension along the front-rear direction together with the support portion, so that the movement toward the vehicle exterior side can be regulated and expanded. The entire body of the body, which has completed the expansion, can regulate its movement to the outside of the vehicle.

In the case of the second aspect of the invention, the airbag is provided with a support portion that overlaps the main body portion on the vehicle exterior side of the main body portion, and from the connecting portion of the support portion with the main body portion to the window peripheral edge. The other end side fixed to the upper edge side can be arranged outside the vehicle within the space of the main body itself in the front-rear direction. That is, since the support portion can be arranged in the space within the longitudinal dimension of the main body portion to restrict the movement of the main body portion to the outside of the vehicle, the airbag can be compactly mounted on the vehicle. be able to. As a result, it is deployed in pickup vehicles such as single cab vehicles and double cab vehicles that have a wall portion near the vertical edge on the rear side of the window periphery that extends inside the vehicle so as to be substantially orthogonal to the window covered with the airbag. It is possible to suppress the movement to the outside of the vehicle when the inflation is completed and to mount the airbag without any trouble.

Further, as described in claim 3, the length dimension of the support portion flatly developed should be shorter than the length dimension when the support portion is unrolled due to the expansion and expansion of the main body portion. For example, with the expansion and expansion of the airbag main body, it is possible to easily generate a high tension in the support portion.

Further, as described in claim 4, a support side portion supported by the support portion in the main body portion is provided with a lateral expansion portion which expands in a rod shape along the front-rear direction when the inflation gas flows in. With this configuration, even if the supporting side portion completes the expansion and expansion, it is difficult for the supporting side portion to contract in the front-rear direction, and the reduction of the protection area in the front-rear direction can be prevented.

Further, as described in claim 5, the support side portion expands from the end side of the main body portion, which is separated from the vertical edge side along the front-rear direction, to the lower edge side when the inflation gas flows in. If the L-shaped inflating portion is provided, the L-shaped inflating portion facilitates ensuring a rigid plate shape in the vicinity of the lower corner of the support-side portion. Therefore, the vicinity of the lower corner of the support-side portion can be restrained from moving to the outer side of the vehicle as much as possible when the pressing force to the outer side of the vehicle is applied, even if it is not directly supported by the supporting portion.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

The head protection airbag apparatus M1 of the first embodiment shown in FIG. 1 is mounted on a double cab vehicle V1, and comprises an airbag 13, an inflator 35, and
The airbag cover 11 is provided.

The double-cab vehicle V1 is arranged on the side of the front and rear seats on which the occupant is seated and is located on the side surface VS of the vehicle.
SW as a side window located in (SW1 ・ S
W2), and the window SW2 is provided on the rear side of the window SW2.
The rear wall portion 7 is arranged so as to be substantially orthogonal to the above. Furthermore, this double cab car V1 has window SW
1 is a front pillar portion F that extends diagonally downward from the roof side rail portion RR on the front side of the vehicle 1 and is disposed substantially vertically.
P, the center pillar portion CP extending downward from the roof side rail portion RR between the windows SW1 and SW2, and the window SW2
And a rear pillar portion RP extending downward from the roof side rail portion RR between the rear wall portion 7 and the rear wall portion 7.
The window SW1 is arranged on the side of the front seat, and in the case of the embodiment, it is a window of the front door.
Is arranged on the side of the rear seat, and in the case of the embodiment, is a window of the rear door.

Each of the pillars FP, CP, RP is provided with a synthetic resin garnish 3, 5, 6 so as to cover the sheet metal inner panel 1a on the vehicle body (body 1) side. . Also in the roof side rail portion RR, a roof head lining 4 made of synthetic resin is provided inside the vehicle so as to cover the inner panel 1a.

Further, as shown in FIG. 1, the rear wall portion 7 has a rear window RW arranged at an upper portion thereof, and a rear panel 8 made of sheet metal on the vehicle body (body 1) side and a rear panel 8 inside the vehicle. And a rear trim 9 made of synthetic resin for covering. The upper end side of the rear wall portion 7 is covered with the roof head lining 4 extending from the ceiling side, and the inflator 35 is covered with its lower edge 4a.

In the case of the embodiment, the airbag cover 11 is composed of the front pillar garnish 3 and the roof head lining 4 and the lower edges 3a and 4a. The airbag cover 11 is disposed so as to cover the inside of the folded and housed airbag 13 and also to cover the inside of the airbag 13 when the airbag 13 is deployed and inflated. It is configured to be pushed to open inside the vehicle.

The airbag 13 has a center pillar portion CP.
It is folded and stored on the upper edge side of the window SW (SW1, SW2) inside the vehicle, straddling. The airbag 13 is
As shown in FIGS. 1 to 3, a configuration is provided that includes a substantially rectangular plate-shaped main body portion 14 capable of covering the insides of the windows SW1 and SW2, the center pillar portion CP, and the rear pillar portion RP, and a support portion 30. Has been done.

The main body portion 14 is formed by a hollow weave using polyamide yarn, polyester yarn or the like. The main body portion 14 is a gas inflow portion 15 that inflates the inflation gas G from the inflator 35 to inflate so as to separate the vehicle inner side wall portion 15a and the vehicle outer side wall portion 15b, and a non-inflow portion that does not allow the inflation gas G to flow in. 24, and is comprised.

The gas inflow section 15 is an expansion inflow section 16 for inflowing the expansion gas G to expand and inflate so as to cover the insides of the windows SW1 and SW2, the center pillar section CP and the rear pillar section RP, and the supply passage section. 22 and. The expansion inflow portion 16 includes a front seat portion 17 that covers the front seat side window SW1 and a rear seat portion 1 that covers the rear seat side window SW2.
8 is provided. Front seat / rear seat part 1
Each of 7 and 18 is configured by arranging a plurality of vertical inflating portions 19 into which the inflating gas G is introduced to inflate vertically in a rod shape. Each vertical expansion part 19 becomes a lateral contraction expansion part that contracts the width dimension in the front-rear direction when expanded. The vertically inflated portions 19A and 19B of the front seat / rear seat portions 17 and 18 that are close to each other have their lower ends communicated with each other by a communication portion 21.

The supply passage portion 22 is a portion 17 for front seats and rear seats.
It is arranged on the upper edge 14a side of the main body portion 14 so as to communicate with the upper ends of the vertical inflating portions 19 in 18 and extend in the front-rear direction. The rear end of the supply passage portion 22 is formed into a cylindrical shape and serves as an inlet portion 22a connected to the inflator 35.

The non-inflow portion 24 is configured to include a peripheral edge portion 25 arranged at the peripheral edge of the main body portion 14 so as to surround the gas inflow portion 15, a plate-like portion 28, and an extending portion 29. There is.
Furthermore, the non-inflow portion 24 extends upward from the peripheral edge portion 25 on the lower edge 14b side of the main body portion 14, and a plurality of thickness regulating portions 26 that partition each vertical expansion portion 19 in the front-rear direction, and the main body portion 1
4 and a plurality of mounting portions 27 extending upward from the peripheral edge portion 25 on the upper edge 14a side. Each mounting portion 27 has a mounting hole 27a through which the mounting bolt 33 is inserted.
Is provided. The attachment plate 32 is attached to each attachment portion 27, and is fixed to the inner panel 1a on the body 1 side using a bolt 33.

The plate-like portion 28 and the extending portion 29 are formed by the main body 14
Is provided in order to secure the overall shape of the above and reduce the volume of the gas inflow portion 15 to shorten the time until the completion of expansion and expansion. The plate-shaped portion 28 has a substantially rectangular plate shape and is arranged between the front seat portion 17 and the rear seat portion 18 of the expansion inflow portion 16 and between the communication portion 21 and the supply passage portion 22. It is set up.

The extending portion 29 has a triangular plate shape extending forward from the front end side of the main body portion 14, and the tip 29a is attached and fixed to the inner panel 1a on the body 1 side below the front pillar portion FP. That is, the extending portion 29 has a front end side, which is one end in the front-rear direction of the main body portion 14,
It is a portion to be fixed to the front pillar portion FP as a vertical edge that is arranged substantially vertically in the peripheral edge of the window SW1. The front end 29a of the extended portion 29 is provided with a mounting hole 29b into which the mounting bolt 33 is inserted. The backing plate 32 is fixed to the front end 29a of the front pillar portion FP by using the bolt 33.
Is fixed to the inner panel 1a at the bottom of the.

The support portion 30 is made of a woven fabric such as polyamide yarn or polyester yarn and can be folded together with the main body portion 14. The support portion 30 has a triangular plate shape that narrows the vertical dimension along the direction away from the vertical edge FP of the peripheral edge of the window SW (that is, the rearward direction in the embodiment). The support portion 30 is disposed on the vehicle outer side O of the support side portion 14B of the main body portion 14 (specifically, the portion from the center in the front-rear direction of the rear seat portion 18 of the expansion inflow portion 16 to the rear side). The outer side O of the support side portion 14B is supported. This support 3
Reference numeral 0 denotes a rear end portion 30a which is away from the front pillar portion FP as a vertical edge, and is located on the upper edge side of the peripheral edge of the window SW2 (specifically, the inner panel 1a on the body 1 side of the roof side rail portion RR above the rear pillar portion RP). The front end side extending toward the front pillar portion FP is connected to the main body portion 14. A bolt 33 is attached to the rear end 30a.
A mounting hole 30b is formed for inserting the. And
The rear end portion 30a is arranged on the vehicle outer side O of the mounting portion 27B on the rear end side, and is fastened together with the mounting portion 27B on the rear end side by a bolt 33, and is fixed to the inner panel 1a.

In the case of the first embodiment, the rear end portion 30a
The mounting hole 30b is arranged at a position corresponding to the mounting hole 27a of the mounting portion 27B when the main body portion 14 and the support portion 30 are flattened out, as shown in FIG.

The front end side of the support portion 30 is a front edge 30c forming a triangular side of the support portion 30, and the front edge 30c is located near the center in the front-rear direction of the rear seat portion 18 of the main body portion 14. O outside the thickness regulating portion 26B
It is sutured. The part of the thickness regulating portion 26B is
Support side portion 14B of the main body portion 14 supported by the support portion 30
It becomes the front end of. The portion 14c of the rear seat portion 18 on the lower edge 14b side of the main body portion 14 extends below the portion of the front seat portion 17, and the lower end 3 of the front edge 30c.
The airbag 13 is configured such that 0d is connected to the lower portion of the main body portion 14 as much as possible so that 0d is disposed in the extended portion 14c.

In the case of the first embodiment, the airbag 1
3 is expanded and inflated, the front side portion of the main body portion 14 on the front side of the support portion 30, that is, the non-support side portion 14F, the respective vertical expansion portions (lateral contraction expansion portion) 19 are expanded, Each of the vertical expansion parts 19 narrows the width dimension in the front-rear direction and applies a tensile force to the lower edge 30e side, and as a result, a tension in the front-rear direction is generated in the support part 30.

As shown in FIG. 1, the inflator 35 is of a substantially columnar cylinder type, and the rear end of the inflow port 22a in the supply passage 22 of the airbag body 14 is externally mounted and clamped (not shown). Is used to connect with the airbag body portion 14. The inflator 35 is attached and fixed to the upper edge side of the rear window RW of the rear wall portion 7 by using the bracket 36 while being covered by the lower edge 4a of the roof head lining 4.

Head protection airbag device M of the first embodiment
The mounting of the vehicle 1 on the vehicle V1 will be described. First, the airbag 13 is folded. This folding is performed along the front-rear direction so that the lower edge 14b side of the main body portion 14 approaches the upper edge 14a side in a state where the airbag 13 having the support portion 30 attached to the main body portion 14 is flatly deployed. Many folds C
(See the chain double-dashed line in FIG. 2) and fold it into a bellows. At this time, the support portion 30 is folded with the mounting hole 30b of the rear end portion 30a aligned with the mounting hole 27a of the mounting portion 27B of the main body portion 14. Then, it is appropriately wrapped with a tape material (not shown) for preventing breakage.

After that, the backing plate 32 is attached to the tip 29a of each attachment portion 27 and the extended portion 29. In addition, by eliminating the folding of the folded inlet port 22a and using the clamp, the inflator 35 is connected to the inlet port 22a, and then the mounting bracket 36 is attached around the inflator 35 to attach the inflator 35 to the airbag. Assemble to 13 to form an airbag assembly. The mounting part 2
7B and the rear end portion 30a of the support portion 30 share the contact plate 32.

Thereafter, the tip 29a of each mounting portion 27 and the extended portion 29 is attached to the inner panel 1 by using the mounting bolt 33.
The airbag assembly can be attached to the body 1 of the vehicle V1 by attaching and fixing the attachment bracket 36a to a and the attachment bracket 36 to the rear panel 9 using bolts.

Then, a lead wire (not shown) extending from the inflator 35 is connected to a predetermined airbag operating circuit, and in the front pillar portion FP, the front pillar garnish 3 is attached and fixed to the inner panel 1a, and the roof side rail portion RR. Then, the inner panel 1a
If the roof head lining 4 is attached and fixed to the vehicle, and further the garnishes 5 and 6 of the center pillar portion CP and the rear pillar portion RP are fixed to the inner panel 1a of the body 1, the head protection airbag device M1 is mounted on the vehicle V1. be able to.

After that, when the inflator 35 is operated, the expansion gas G flows from the inflow port 22a to the expansion inflow part 1
6, the tape material (not shown) is ruptured, and the vertical expansion parts 19 are further expanded and inflated, so that the airbag 13 has the pillar garnish 3 as the airbag cover 11 and the roof head. Lower edge 3a of lining 4
・ 4a is pushed inside the vehicle to open it, and as shown by the chain double-dashed line in Fig. 1, it projects downward from the upper edge side of the windows SW1 and SW2,
The airbag body portion 14 covers the inside of the windows SW1 and SW2, the center pillar portion CP, and the rear pillar portion RP.

The body portion 14 of the airbag 13 is
When the expansion gas G is introduced and expanded, the support portion 30
With the airbag body portion 14, the body portion 1 is drawn out from the upper edge side of the peripheral edge of the window SW2 and is given tension.
The outer side O of the support side portion 14B in 4 is supported (see FIG. 3). Then, the support portion 30 can be extended from the storage portion without any drive source by simply connecting the support portion 30 to the peripheral edge of the window SW2 and the main body portion 14.

Therefore, in the head protecting airbag device M1 of the first embodiment, the supporting side of the airbag main body portion 14 whose expansion and expansion is completed by the supporting portion 30 can be simply suppressed while suppressing an increase in the number of constituent parts. The movement of the portion 14B to the outside O of the vehicle can be restricted.

Further, in the first embodiment, the support portion 30 supports the vehicle outer side O at a portion on the vertical edge FP side of the peripheral edge of the window SW with respect to the connection portion 26B of the airbag body portion 14 with the support portion 30. Instead, it becomes the non-support side portion 14F. However, when the main body portion 14 expands and expands, the upper edge 14a side is
Roof side rail RR located at the upper edge of the window SW periphery
The front edge 29a in the front-rear direction fixed to the inner panel 1a of FIG.
It is fixed to P and is configured to expand and expand downward from the upper edge side of the window SW when expanding and expanding. Further, when the inflation gas G flows in, a tension can be applied to the support portion 30 at a portion of the main body portion 14 on the longitudinal edge FP side of the connection portion 26B with the support portion 30 (that is, the non-support side portion 14F). ,
Lateral contraction expansion part 19 that expands so as to contract in the front-back direction
Are arranged. Therefore, the main body 14
The non-support side portion 14F of the inflows the expansion gas G,
When the lateral contraction expansion part 19 is expanded, tension is generated in the front-back direction in the support part 30 and the non-support side part 14F
Tension in the front-rear direction is also generated on the lower edge 14b side.

As a result, the non-supporting side portion 14F of the main body portion 14, which is not supported by the support portion 30 on the vehicle exterior side O, also moves to the vehicle exterior side O along with the support portion 30 by generating tension along the front-rear direction. The entire main body portion 14 that has been regulated and has completed the expansion and expansion can regulate its movement toward the outside O of the vehicle, and can enhance the occupant restraint performance.

Further, the airbag 13 of the first embodiment is provided with the support portion 30 that overlaps the body portion 14 on the vehicle outer side O of the body portion 14, and extends from the connection portion 30c of the support portion 30 with the body portion 14. The other end 30a side fixed to the upper edge side of the peripheral edge of the window SW2 can be arranged on the vehicle body outer side O within the range of the space in the front-rear direction of the main body portion 14 itself, particularly the expansion inflow portion 16. That is, since the support portion 30 is arranged in the space within the length dimension W (see FIG. 2) of the expansion / inflow portion 16 in the front-rear direction, the movement of the main body portion 14 to the vehicle exterior O can be restricted. Compact, airbag 1
3 can be mounted on the vehicle V1. As a result, the window S
In the vicinity of the vertical edge (rear pillar portion RP) on the rear side of the W2 peripheral edge,
Even in the double-cab vehicle V1 having the rear wall portion 7 extending inwardly of the vehicle so as to be substantially orthogonal to the windows SW (SW1 and SW2) covered by the airbag 13, the movement to the vehicle outer side O at the time of completion of the expansion and inflation is suppressed. The airbag 13 can be mounted without any trouble.

In the conventional airbag for a head protection airbag device, the front edge 30c of the support portion 30 is provided without providing the triangular support portion 30 so as to be overlapped with the outer side O of the main body portion 14. , The rear end 30a of the support portion 30 is connected to the upper edge side of the rear window edge of the main body portion 14 so as to be connected to the rear edge 14d of the main body portion 14.
A tension along the front-rear direction is generated on the 4b side to restrict the movement of the main body portion 14 to the outside O of the vehicle.
Therefore, the conventional airbag cannot be mounted on the vehicle V1 as shown in the figure.

In the first embodiment, the triangular plate-shaped support portion 30 is used, but a belt-shaped support portion 30A may be used as shown in FIG. Such a belt-shaped support portion 3
In 0A, the front edge 30c side is set to the main body portion 14 so that tension can be stably generated along the front-rear direction at the portion of the unsupported portion 14F on the lower edge 14b side of the main body portion 14.
It is desirable to connect to the extended portion 14c on the lower edge 14b side which is the lower side of the.

Further, in the first embodiment, the length L0 (see FIG. 2) of the lower edge 30e of the support portion 30 is extended from the lower end of the connecting portion 26B of the main body portion 14 in the flatly developed state to the mounting portion 27B. To match the length dimension of. But,
Like the airbag 13A of the head protection airbag apparatus M2 of the second embodiment shown in FIGS. 5 to 8, the length dimension L1 (see FIG. 6) of the flatly developed lower edge 30e of the support portion 30B is
The length dimension may be shorter than the length dimension L2 (see FIG. 8) of the lower edge 30e when the main body portion 14 is unrolled along with the expansion and expansion.

Head protection airbag device M of the second embodiment
In FIG. 2, as shown in FIGS. 5 and 6, the main body portion 14 of the airbag 13A is configured so that the inflow port portion 22a connected to the inflator 35 is projected upward from the upper edge 14a side of the substantially middle portion in the front-rear direction. The extension portion 29 on the front end side of the main body portion 14 is sewn and connected to the front end side of the peripheral edge portion 25 as a separate body from the peripheral edge portion 25.

Further, the thickness restricting portions 26C and 26D arranged in the rear seat portion 18 of the expansion inflow portion 16 do not connect the lower end side to the peripheral edge portion 25, so that the rear seat portion 18 is formed.
A lateral expansion portion 20 that expands in a rod shape along the front-rear direction when the expansion gas G flows in is provided on the lower edge side. In addition,
In the second embodiment, further, the longitudinal expansion portion 19C on the rear end side and the lateral expansion portion 20 are communicated with each other, so that when the expansion gas G flows in, the main body portion 14 is separated from the vertical edge FP side along the front-rear direction.
An L-shaped inflatable portion 16a (indicated by a diagonally downward-sloping line in FIG. 6) that inflates from the rear end 14d side to the lower edge 14b side is formed. Further, the vertical expansion section 19
The upper end side of C communicates with the supply passage portion 22, and the lateral expansion portion 2
The 0-longitudinal expansion portion 19C and the rear end side of the supply path portion 22 also form a U-shaped expansion portion 16b (a portion shown by a diagonal line descending to the right in FIG. 6).

Furthermore, the airbag 1 of the second embodiment.
In 3A, the front edge 30c of the support portion 30B is sewn to the front edge 28a side of the plate portion 28. In addition, the airbag 13
In A, the communication portion 21 such as the airbag 13 is not provided below the plate-shaped portion 28.

In addition to these, the shape of the support portion 30 is slightly different as will be described later, and other configurations are the same as those in the first embodiment. The same reference numerals are given and the description is omitted.

Then, the airbag 13A of the second embodiment.
Then, when the support portion 30B has a triangular plate shape that narrows the vertical dimension from the front edge 30c side toward the rear side and is flatly deployed, as shown in FIG. 6, the lower edge 30e is the front edge 30e.
The mounting hole 30b of the rear end portion 30a is set so as to extend rearward along the lower edge 14b of the main body portion 14c, and the mounting portion 27B on the rear end side of the main body portion 14 that is flattened out is positioned.
It corresponds to the position below the mounting hole 27b in.

Similar to the airbag 13 of the first embodiment, this airbag 13A also has a body portion 14 when mounted on a vehicle.
Together with the support portion 30B connected to the connection portion 28a of
The lower edge 14b side of the main body portion 14 is bellows-folded so as to approach the upper edge side 14a, the mounting hole 30b of the rear end portion 30a and the mounting hole 27b of the mounting portion 27B are aligned, and then the backing plate 32 is fixed. Then, the mounting bolts 33 are shared and mounted on the inner panel 1a of the roof side rail portion RR.

Also in the second embodiment, the steps of assembling the inflator 35 and the contact plate 32 and mounting them on the vehicle V1 are the same as those in the first embodiment.

Also in the second embodiment, even if the support portion 30B connects the front edge 30c to the main body portion 14, the main body portion 1
4, when the support portion 30B is bellows-folded, the mounting hole 30b of the rear end portion 30a is previously attached to the mounting hole 27 of the mounting portion 27B.
Since the air bag 13A is set so as to match a, mounting of the backing plate 32 after folding the airbag 13A and mounting of the rear end portion 30a to the vehicle can be performed integrally with the mounting portion 27B. Work can be performed easily.

If the inflator 35 operates after the head protection airbag device M2 is mounted on the vehicle V1,
The expansion gas G flows into the supply passage portion 22 of the expansion inflow portion 16 from the inflow port portion 22a, breaks the tape material (not shown), and further expands and expands the vertical expansion portions 19 and the horizontal expansion portions 20. The airbag 13A includes the pillar garnish 3 and the roof head lining 4 as the airbag cover 11.
The lower edges 3a and 4a are pushed toward the inside of the vehicle to be opened, and, as shown by the chain double-dashed line in FIG. 5 and the solid line in FIG. 8, the airbag body 14 projects downward from the upper edge side of the windows SW1 and SW2. S
W1, SW2, center pillar part CP, rear pillar part R
It will cover the inside of P.

At this time, the support portion 30B is extended together with the airbag body portion 14 from the upper edge side of the peripheral edge of the window SW2, and tension is applied by the expansion of each lateral contraction expansion portion 19 in the non-support side portion 14F. By supporting the vehicle outer side O of the support side portion 14B of the main body portion 14 (see FIG. 7), it is possible to obtain the same operation and effect as in the first embodiment.

In particular, at the lower edge 30e of the support portion 30B of the second embodiment, the flat length dimension L1 is shorter than the length dimension L2 when it is unrolled as the main body portion 14 expands and expands. The length is used. That is, the length dimension L1 of the main body portion 14 before the expansion and expansion is the length dimension from the front edge 30c in the front-rear direction along the lower edge 14b of the main body portion 14 to the mounting portion 27B. However, when the airbag 13A is deployed and inflated after being mounted on a vehicle, the lower edge 30e extends obliquely forward and downward with the rear end portion 30a being disposed on the upper edge side (roof side rail portion RR) of the window SW2 peripheral edge. And, as if it was pulled and stretched,
The length dimension L2 will be lengthened. Therefore, a high tension can be easily generated in the lower edge 30e of the support portion 30B along with the expansion and inflation of the airbag body portion 14, and a high front-back direction in the lower edge 14b of the non-support side inflatable portion 14F. It is possible to generate tension.

As a result, the airbag 13 of the second embodiment.
In A, the non-support side portion 14F of the main body portion 14 is provided with a high front-rear tension, and the support side portion 14B of the main body portion 14 is supported by the support portion 30B to which a high front-rear direction tension is applied. With the outer side O being supported, the main body portion 14, particularly the entire inflow inflow portion 16, becomes difficult to move to the vehicle outer side O, and high occupant restraint performance can be obtained.

Further, in the airbag 13A of the second embodiment, the lateral expansion which expands in a rod shape along the front-rear direction when the inflation gas G flows into the support side portion 14B supported by the support portion 30B of the main body portion 14 is provided. A section 20 is provided. Therefore, even if the rear seat side portion 18 of the expansion inflow portion 16 in the support side portion 14B completes the expansion and expansion, it is difficult to contract in the front-rear direction, and the reduction of the protection area in the front-rear direction can be prevented.

Furthermore, the airbag 13A of the second embodiment.
Then, when the expansion gas G flows into the support side portion 14B,
An L-shaped inflating portion 16a that inflates is provided from the rear end 14d side of the main body portion 14 away from the vertical edge FP side along the front-rear direction to the lower edge 14b side. Therefore, near the lower corner DC of the support side portion 14B, it becomes easy to secure a rigid plate shape by the L-shaped expanded portion 16a. As a result, the vicinity of the lower corner DC of the support-side portion 14B is closer to the support portion 30B.
Even when it is not directly supported by the vehicle, it is possible to suppress the movement to the vehicle outer side O as much as possible when receiving the pressing force to the vehicle outer side O.

Furthermore, in the second embodiment, the L-shaped inflating portion 16a connects the upper end of the vertical inflating portion 19C to the rear end of the supply passage portion 22 and is connected to the rear end side of the support side portion 14B. The character-shaped inflating portion 16b is provided, and a part (front end side) of the character-shaped inflating portion 16b is overlapped with the inside of the supporting portion 30B to form the supporting portion 30B
Since it is configured to be supported by, the movement of the inflating portion 16b to the vehicle exterior side is further restricted.

In the head protection airbag apparatus M3 of the third embodiment shown in FIG. 9, the vehicle V2 to be mounted is used as a single cab vehicle, and when the airbag 43 is inflated and inflated, the front pillar portion FP to the rear pillar portion RP portion. Is arranged so as to cover the window SW as one side window up to. In the third embodiment as well, the same parts as those in the first and second embodiments are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIGS. 9 to 11, the airbag 43 comprises a main body portion 44 formed by hollow weaving using polyamide threads or polyester threads, and a belt made of woven cloth such as polyamide threads or polyester threads. Shaped support 60
And are provided.

The main body portion 44 allows the inflation gas G from the inflator 35 to flow in and expands so as to separate the vehicle interior side wall portion 45a and the vehicle exterior side wall portion 45b from each other, and the inflation gas G does not flow in. And a non-inflow portion 51.

The gas inflow section 45 is provided with an expansion inflow section 46 for inflowing the expansion gas G to expand and inflate so as to cover the inside of the window SW and the rear pillar section RP, and an inflow section 49. Has been done. The expansion inflow part 46 is arranged so as to cover the inside of the rear pillar part RP in the vertical direction, and the horizontal expansion part 47 is arranged so as to extend from the vertical expansion part 47 in the vertical direction in three stages in the front direction. Expansion part 48 (48A
48B / 48C).

The inflow port portion 49 extends rearward from the upper end of the rear end of the main body portion 14 and is projected in a cylindrical shape so as to be externally connected to the inflator 35 and connectable thereto.

The non-inflow portion 51 is configured to include a peripheral edge portion 52 arranged at the peripheral edge of the main body portion 44 so as to surround the gas inflow portion 45, and a plate-shaped portion 55. Further, the non-inflow portion 51 extends rearward from the peripheral edge portion 52 on the front side of the main body portion 44, and a plurality of (two in the embodiment) thickness regulating portions 53 that partition each lateral expansion portion 48 in the vertical direction. , A plurality of mounting portions 54 extending upward from the peripheral edge portion 52 on the upper edge 44a side of the main body portion 44. Each mounting portion 54 is provided with a mounting hole 54a through which the mounting bolt 33 is inserted. The attachment plate 32 is attached to each attachment portion 54, and is fixed to the inner panel 1a on the body 1 side using a bolt 33.

The plate-like portion 55 secures the entire shape of the main body portion 44 and reduces the volume of the gas inflow portion 45,
It is arranged in order to shorten the time until the completion of expansion and expansion. The plate-shaped portion 55 has a substantially triangular plate shape and is disposed on the front end side of the main body portion 44, and the tip 55 a is located on the body 1 side of the inner panel 1 on the lower side of the front pillar portion FP.
It is attached and fixed to a. That is, this plate-shaped portion 55
Is the window S on the front end side, which is one end in the front-rear direction of the main body portion 44.
It becomes a portion to be fixed to the front pillar portion FP as a vertical edge arranged in the substantially vertical direction of the W peripheral edge. The front end 55a of the plate-shaped portion 55 is provided with a mounting hole 55b into which the mounting bolt 33 is inserted, and the backing plate 32 is fixed to the front end 55a.
It is fixed to the inner panel 1a below the front pillar FP by using the bolt 33.

Further, on the front side of the lowermost lateral expansion section 48C on the lower side of the plate-like section 55 (the vertical edge FP side on the lower edge 44b side of the main body section 44), a support section 60 is provided from the vehicle interior I side. A slit 56 is formed to be inserted through the outside O.
The peripheral edge of the slit 56 is provided on the slit 56 with a support portion 60.
When it is inserted, it becomes a connection part 57 with the support part 60.

The support portion 60 is made of a woven fabric such as polyamide yarn or polyester yarn and can be folded together with the main body portion 44. The support portion 60 has a rear end portion 60a, which is separated from the front pillar portion FP as a vertical edge, at the upper edge side of the window SW peripheral edge (specifically, the inner panel on the body 1 side of the roof side rail portion RR above the rear pillar portion RP). 1a) and the front end portion 60c extending toward the front pillar portion FP is connected to the lower side of the front pillar portion FP.

Mounting holes 60b and 60d for inserting the bolts 33 are formed in the rear end portion 60a and the front end portion 60c. The rear end portion 60a is attached to the rear end side mounting portion 54B.
Is disposed on the vehicle outer side O, is fastened together with the mounting portion 54B on the rear end side by the bolt 33, and is fixed to the inner panel 1a. Further, the front end portion 60c is the plate-shaped portion front end 55a.
It is arranged on the inner side I of the vehicle, and by the bolt 33, the front end 55
It is fastened together with a and fixed to the lower part of the front pillar portion FP. That is, the support portion 60 is arranged on the vehicle inner side I of the body portion 44 on the front end side of the body portion 44 and allows the slit 56 to be inserted therethrough, and is placed on the vehicle outer side O of the body portion 44 on the rear side of the body portion 44. It is arranged (see FIG. 11). Then, the rear side 60B which is inserted through the slit 56 of the supporting portion 60
Serves as a support portion that supports most of the outside O of the expansion / inflow portion 46 of the main body 44.

The front end portion 60c of the support portion 60 is
As shown in FIGS. 9 and 12, the length from the front end portion 60a to the rear end portion 60a is fixed to the inner panel 1a of the body 1 so that the support portion 60 extends from the front end portion 60c to the rear end portion 60a. Is the front pillar FP of the vehicle V2
It is set so as to be covered and stored by the airbag cover 11 in the range from the lower part of the vehicle to the upper side of the rear pillar portion RP through the roof side rail portion RR. Further, the length from the front end portion 60c to the rear end portion 60a of the support portion 60 is determined by the main body portion 4 with the front and rear end portions 60c and 60a fixed to the inner panel 1a of the body 1.
4 is expanded and inflated, and when the connecting portion 57 of the main body portion 44 is extended downward, the expanded main body portion 44 (expansion inflow portion 4
The length dimension is such that tension can be generated in the support portion 60 by the downward pressing force of 6).

To mount the airbag apparatus M3 on the vehicle V2, first, the airbag 43 is folded, as in the first and second embodiments. In this folding, the main body 44 is flattened in a state where the support portion 60 is inserted into the slit 56, and the lower edge 44b side of the main body portion 44 is brought closer to the upper edge 44a side together with the support portion 60. , A large number of folds C along the front-rear direction (see the chain double-dashed line in FIG. 10) are made, and the bellows is folded. When this folding is completed, the support portion 60 has the mounting hole 60d on the front end side and the mounting hole 55b on the front end 55a of the main body portion.
The mounting hole 60b on the rear end side of the main body 14
It is aligned with the mounting hole 54a of the mounting portion 54B on the rear end side. Then, it is appropriately wrapped with a tape material (not shown) for preventing breakage.

After that, the backing plate 32 is attached to the tips 55a of the mounting portions 54 and the plate portion 55. The mounting portion 54
B and the support portion rear end portion 60a, and the plate-shaped portion front end 55a and the support portion front end portion 60c share the contact plate 32, respectively. And again, the folded inlet port 49
Then, the inflator 35 is connected to the inflow port 49 while using the clamp, and then the mounting bracket 36 is attached to the periphery of the inflator 35.
5 is assembled to the airbag 43 to form an airbag assembly.

After that, each mounting portion 54 and the plate-shaped portion tip 55a
Is fixed to the inner panel 1a using the mounting bolts 33, and the mounting bracket 36 is fixed to the rear panel 9 using the bolts, the airbag assembly is mounted to the body 1 of the vehicle V2. be able to.

If the inflator 35 operates after the head protection airbag device M3 is mounted on the vehicle V2,
The inflation gas G flows from the inflow port 49 into the inflation inflow part 46, breaks the tape material (not shown), and further expands and inflates the vertical inflating parts 47 and 48, so that the airbag 43
The lower edges 3a, 4a of the pillar garnish 3 as the airbag cover 11 and the roof head lining 4 are pushed toward the inside of the vehicle to be opened, and as shown by the two-dot chain line in FIG. The bag body portion 44 covers the inside of the window SW and the rear pillar portion RP.

At this time, the support portion 60 is extended from the upper edge side of the window SW peripheral edge together with the airbag main body portion 44,
Tension is given by the downward force of the expansion inflow portion 46 acting through the connecting portion 57, and the portion 60B on the rear side of the slit 56 in the supporting portion 60.
Support most of the vehicle outer side O in the expansion / inflow portion 46 of the main body portion 44.

The supporting portion 60 can be extended from the storage portion without any drive source by simply connecting the support portion 60 to the peripheral edge of the window SW and the main body portion 44.

Therefore, even in the head protection airbag device M3 of the third embodiment, the vehicle of the airbag inflation / inflow portion 46 in which the expansion and inflation is completed by the support portion 60 can be simply suppressed while suppressing an increase in the number of constituent parts. Movement to the outside O can be restricted.

Also in the airbag 43 of the third embodiment, when the inflation gas G flows into the inflation inflow portion 46 supported by the support portion 60 of the main body portion 44, a plurality of rods are inflated along the front-rear direction. Lateral expansion part 48 (48A / 48B /
48C) is provided. Therefore, even if the expansion inflow part 46 that supports the vehicle outer side O by the support part 60 completes the expansion and expansion, it is difficult for the expansion inflow part 46 to contract in the front-rear direction, and the reduction of the protection area in the front-rear direction can be prevented.

Further, also in the airbag 43 of the third embodiment, the inflation / inflow portion 46 supported by the support portion 60 is
When the expansion gas G flows in, from the rear end 44d side of the main body portion 44, which is separated from the vertical edge FP side along the front-rear direction, to the lower edge 44b.
An L-shaped inflatable portion 46a (a portion indicated by a diagonal line descending to the left in FIG. 10) including a vertical inflatable portion 47 and a lateral inflatable portion 48C is provided toward the side. Therefore, near the lower corner DC of the expansion inflow portion 46, the L-shaped expansion portion 46a facilitates ensuring a rigid plate shape. As a result, even when the vicinity of the lower corner DC of the expansion inflow portion 46 is not directly supported by the support portion 60, when the pressing force to the outside O of the vehicle is received, the movement to the outside O of the vehicle is suppressed as much as possible.

Further, also in the third embodiment, the L-shaped inflating portion 46a makes the upper end of the vertical inflating portion 47 communicate with the rear end of the uppermost horizontal inflating portion 48A, and the rear end side of the inflating inflow portion 46. Is provided with a U-shaped inflating portion 46b (indicated by a diagonally downward-sloping line in FIG. 10), and a part (front end side) of the inflating portion 46b is overlapped with the inside of the supporting portion 60 so that the supporting portion 60 is provided. Since it is configured to be supported, the movement of the inflating portion 46b to the vehicle outer side O is further restricted.

In the airbag 43 of the third embodiment, the slit 56 for inserting the support portion 60 into the main body portion 44.
1 is provided and the periphery of the slit 56 serves as a connection portion 57 of the support portion 60 to the main body portion 44.
As shown in FIG. 3, the support portion 6 is provided on the vehicle exterior surface of the main body portion 44.
The loop portion 56A through which 0 is inserted may be fixed, and the loop portion 56A may be used as the connecting portion 57 of the support portion 60 to the main body portion 44. In this case, the entire length of the belt-shaped support portion 60 can be arranged outside the vehicle body of the main body portion 44.

In each of the embodiments, the airbag 13
The case where the front end sides of the main body portions 14 and 44 of 13A and 43 are connected and fixed to the lower side of the front pillar portion FP which is the vertical edge of the window peripheral edge is shown.
The rear pillar portion RP may be configured to fix the tips of the main body portions 14 and 44. In this case, the inflator 35 to be connected may be configured to be appropriately connected to the front end side or the rear end side of the main body portion 14/44, or an intermediate portion in the front-rear direction.

[Brief description of drawings]

FIG. 1 is a front view of a head protection airbag device according to a first embodiment of the present invention mounted on a vehicle as seen from the inside of the vehicle.

FIG. 2 is a front view showing a state in which the airbag used in the first embodiment is flatly deployed.

FIG. 3 is a partial transverse cross-sectional view showing an airbag used in the first embodiment when inflated, and corresponds to a III-III portion in FIG.

FIG. 4 is a view showing a modified example of the airbag of the first embodiment.

FIG. 5 is a front view of the head protection airbag apparatus according to the second embodiment mounted on a vehicle as seen from the inside of the vehicle.

FIG. 6 is a front view showing a state in which the airbag used in the second embodiment is flatly deployed.

FIG. 7 is a partial cross-sectional view showing an airbag used in the second embodiment when inflated, which corresponds to a portion VII-VII in FIG.

FIG. 8 is a view of the head protection airbag device according to the second embodiment when it is operating, as viewed from the inside of the vehicle.

FIG. 9 is a front view of the head protection airbag device according to the third embodiment mounted on a vehicle as seen from the inside of the vehicle.

FIG. 10 is a front view showing a state in which the airbag used in the third embodiment is flatly deployed.

11 is a partial cross-sectional view showing the airbag used in the third embodiment when inflated, and corresponds to the XI-XI portion in FIG. 10. FIG.

FIG. 12 is a diagram showing an airbag according to a third embodiment after being folded and in a stored state.

FIG. 13 is a diagram showing a modified example of the airbag of the first embodiment.

[Explanation of symbols]

13 ・ 13A ・ 43 ... airbags 14.44 ... Main body, 14F: non-supporting side portion, 14B ... supporting site, 19 ... (horizontal contraction expansion part) vertical expansion part, 20 ... Lateral expansion part, 26B / 30c / 57 ... connecting portion, 30, 30A, 30B, 60 ... Supporting part, SW, SW1, SW2 ... window, RR ... (upper edge side of the window edge) Roof side rail part, FP ... (vertical edge of the window edge) Front pillar part, O ... outside the car, V1, V2 ... Vehicles, M1, M2, M3 ... Head protection airbag device.

Continued front page    F-term (reference) 3D054 AA07 AA18 AA20 BB21 BB24                       CC06 CC10 CC30 FF15

Claims (5)

[Claims] 1. An air bag, which is folded and housed around the periphery of a window of a vehicle, is provided so as to expand and inflate so as to cover the window when the inflating gas flows in. The air bag inflows the inflating gas. Head protection configured by including a main body portion that is expanded and inflated by the above, and a support portion that is disposed outside the vehicle body of the main body portion when the expansion and inflation is completed and that restricts movement of the main body portion to the outside An airbag device, wherein the support portion is connected to the main body portion and the peripheral edge of the window, is folded and stored together with the main body portion in the peripheral edge of the window, and
The head protection airbag is arranged so as to be extended from the peripheral edge of the window and to be tensioned by the main body portion when expanded and inflated so as to support the vehicle exterior side of the main body portion. apparatus. 2. A vertical edge in which the main body portion fixes the upper edge side at the time of completion of expansion and expansion to the upper edge of the window peripheral edge, and has one end in the front-rear direction arranged substantially in the vertical direction of the window peripheral edge. The support portion is fixed to the upper edge side of the window peripheral edge, and the support portion is fixed to the upper edge side of the window peripheral edge to expand and inflate downward from the upper edge side of the window peripheral edge. The other end side extending to the edge side is connected to the vehicle outer side in the vicinity of the intermediate portion in the front-rear direction of the main body portion, and to the portion on the vertical edge side from the connection portion of the main body portion with the support portion, when the inflation gas flows in. 2. The head protection airbag device according to claim 1, wherein a lateral contraction inflating section that expands so as to contract in the front-rear direction so that tension can be applied to the support section is arranged. . 3. The support portion is arranged such that the length dimension flatly developed is a shorter length dimension than the length dimension when the support portion is extended as the main body portion is deployed and expanded. The head protection airbag device according to claim 1 or 2, characterized in that. 4. A support side portion of the main body portion supported by the support portion is formed by disposing a lateral expansion portion that expands in a rod shape along the front-rear direction when the expansion gas flows in. The head protection airbag device according to any one of claims 1 to 3, wherein: 5. The support side portion of the main body portion supported by the support portion is a lower edge side from an end side of the main body portion which is separated from the vertical edge side along the front-rear direction when the expansion gas flows in. The head protection airbag device according to any one of claims 1 to 4, wherein an L-shaped inflatable portion that inflates is disposed.