WO2019003521A1

WO2019003521A1 - Side airbag device

Info

Publication number: WO2019003521A1
Application number: PCT/JP2018/011762
Authority: WO
Inventors: 優斗小林; 輝幸浅田; 真夫馬
Original assignee: オートリブディベロップメントエービー; 優斗小林; 輝幸浅田; 真夫馬
Priority date: 2017-06-28
Filing date: 2018-03-23
Publication date: 2019-01-03
Also published as: JP6810264B2; JPWO2019003521A1

Abstract

[Problem] To provide a side airbag device capable of maintaining suitable internal pressure in an expanded and deployed cushion and more sufficiently protecting passengers, even in a situation in which the cushion is sandwiched between passengers or between a passenger and a side door. [Solution] This side airbag device 100 is provided with a bag-like cushion 118, which is provided on a side portion of a seat back 106 of a vehicle seat 104 and expands and deploys toward the side of a passenger in the vehicle seat by using a gas supplied from an inflator 120. The cushion includes: a first panel 124 near the passenger; a second panel 126 far away from the passenger; a tear seam 130 which sews upper edges 132, 136 of the first panel and the second panel together in a tearable manner; and a third panel 128 which continues on from the upper edge of the first panel to extend toward the inside of the cushion and is folded to continue on to the upper edge of the second panel, wherein the tear seam tears upon receiving a tensile force exceeding a predetermined value during the expansion and deployment of the cushion.

Description

Side airbag device

The present invention relates to a side airbag apparatus provided with a bag-like cushion that is inflated and deployed to the side of a passenger of a vehicle seat at the time of a side collision or the like of a vehicle.

In recent vehicles, air bag devices are almost equipped as standard. The airbag device is a safety device that operates in an emergency such as a vehicle collision, and inflates and deploys the cushion with gas pressure to receive and protect the occupant. As one example, the side airbag device includes a bag-like cushion that is inflated and deployed to the side of the occupant of the vehicle seat at the time of a side collision or the like of the vehicle.

Usually, when a vehicle receives a lateral impact, the occupant moves in the vehicle width direction. For example, when a side collision occurs when an object (collision object) such as another vehicle or utility pole collides on the side door on the passenger seat side, the side airbags for protecting the occupant are roughly classified into two types. The first is a so-called near-side airbag (Patent Document 1), which inflates and deploys between the passenger seat and the side door, and the passenger on the collision object side (the near-side passenger; in this case, the passenger side passenger ) To prevent collision with the side door. The second is a so-called far-side airbag, which is inflated and deployed between the driver's seat and the front-passenger's seat, and moved to the center of the vehicle by a lateral impact (far-side passenger; driver in this case) Protect the side passenger).

According to Patent Document 1, the third base cloth is interposed between the first base cloth on the passenger side and the second base cloth on the door side, so that the first bag half on the passenger side and the second bag half on the door side A body side airbag device is described. A communication hole is formed at an end of the third base cloth which is far from the inflator. The second base cloth and the third base cloth are sewn so as to be broken along a plurality of sewing lines extending in the vertical direction between the inflator and the communication hole.

In Patent Document 1, since the gas supplied from the inflator to the second bag half is supplied to the first bag half through the communication hole of the third base cloth, the second bag half is first expanded and the necessary minimum It is said that the vehicle occupant restraining performance can be enhanced by securing the vehicle occupant restraining performance and then deploying the first airbag half body. Furthermore, according to Patent Document 1, since the sewing of the sewing line is broken by the gas supplied from the inflator to the second bag half, the entire second bag half can be deployed to restrain the occupant when the sewing is broken. Can expand the

International Publication No. 2010/076881

Whether it is a near-side airbag or a far-side airbag, considering only the situation in which the cushion receives one occupant, adjusting the cushion to maintain an appropriate internal pressure according to this situation allows the one person to It can receive and protect occupants.

However, in the case of the far-side airbag in which the cushion is located between the driver's seat and the passenger's seat, the cushion after inflation and deployment may simultaneously receive the two occupants on both sides, and the cushion may be pinched by the two occupants. . Further, even in the case of a near side airbag in which a cushion is positioned between the vehicle seat and the side door, the cushion after inflation and deployment may be pinched between the occupant and the side door.

As described above, in a situation where the cushion is pinched from both sides, the internal pressure of the cushion may be excessively increased, which is not preferable from the viewpoint of protecting an occupant. That is, it is necessary to maintain an appropriate internal pressure in consideration of not only the situation in which the cushion receives one occupant, but also the situation in which two occupants or the occupant and the side door pinch each other.

According to the technique described in Patent Document 1, when gas is supplied from the inflator to the second bag half at the time of a collision, the sewing of the sewing line is always broken and only the entire second bag half is expanded. The measures against the above situation where the internal pressure of the cushion is excessively increased are not taken.

In view of such a problem, the present invention maintains an appropriate internal pressure of the cushion even under a situation where the inflated and deployed cushion is pinched between the occupants or between the occupant and the side door, and the occupants are further It is an object of the present invention to provide a side airbag device that can be fully protected.

In order to solve the above-mentioned subject, a typical composition of a side air bag device concerning the present invention is provided in the side of a seat back of a vehicular seat, and uses the gas supplied from an inflator for the vehicular seat. In the side airbag device having a bag-like cushion that inflates and deploys to the side of the occupant, the cushion comprises a first panel closer to the occupant, a second panel farther from the occupant, the first panel and the second panel A joint that joins the upper edges of the first panel, and a third panel that extends toward the inside of the cushion continuously to the upper edge of the first panel and is further folded back and continues to the upper edge of the second panel; The invention is characterized in that the joint is released when a tension exceeding a predetermined value is received at the time of inflation and deployment of the cushion.

In the present invention, when the internal pressure of the cushion rises excessively due to the cushion being pinched by two occupants or between the vehicle seat and the side door, the tension applied to the base cloth of the cushion is thereby increased. I used that. As the tension on the base fabric such as the first panel and the second panel increases, the tension on the joint also increases. When the tension applied to the joint exceeds a predetermined value, the joint releases the joint. Then, the third panel sagging inside the cushion is stretched between the first panel and the upper edge of the second panel. That is, the dimension in the vehicle width direction of the cushion is increased, and the internal pressure of the cushion can be reduced. By lowering the internal pressure of the cushion, it is possible to sufficiently absorb the impact energy received from the two occupants, especially from the head, and to prevent the deterioration of the head injury value.

The joint portion may be a tear seam that sews the upper edges of the first and second panels in a breakable manner. As a result, it is possible to form a joint only by sewing the upper edges of the first and second panels of the cushion.

The joint portion may be an adhesive that releasably adheres the upper edges of the first panel and the second panel. Thereby, a junction part can be formed only by adhering the upper edges of the 1st panel and the 2nd panel of a cushion.

The above-mentioned third panel may be a base cloth separate from the first panel and the second panel, which is continuous to the upper edge by being sewn to the upper edge of the first panel and the second panel, respectively. . In this manner, the flexible third panel can be formed by a base fabric separate from the first panel and the second panel.

The first panel, the second panel and the third panel described above may be composed of one base cloth. Thus, the third panel can also be formed by a backing integral with the first and second panels.

The above-mentioned joint part may have a convex part projected towards the inside of a cushion in the middle of the upper edge of the 1st panel and the 2nd panel. As described above, when the joint portion has the convex portion protruding toward the inside of the cushion in the middle of the upper edge of the first panel and the second panel, stress is concentrated on the convex portion at the time of expansion and deployment. For this reason, if the joint portion is a tear seam, it will be broken as a starting point, and if it is an adhesive, it will be peeled off as a starting point, and bonding can be more reliably released.

The third panel may have a vent hole for exhausting the gas to the outside. As a result, when the joint of the joint is released, not only the dimension of the cushion in the vehicle width direction becomes large, but also a vent hole provided in the third panel appears. Therefore, the gas inside the cushion is exhausted to the outside, and the internal pressure of the cushion can be further lowered.

The above cushion may be located between the vehicle seat and an adjacent seat adjacent in the vehicle width direction of the vehicle seat, and the upper end of the cushion may contact the ceiling of the vehicle at the time of inflation and deployment. As a result, when the vehicle seat and the next seat are, for example, the driver's seat and the passenger seat, respectively, the upper end of the cushion is on the vehicle ceiling even if both sides of the cushion after inflation and deployment are caught by two passengers. The cushion is less likely to fall because it contacts. Thus, the cushion can easily absorb impact energy and can more fully protect the occupant's head.

The above cushion may be located between the vehicle seat and the side door. As a result, even if both sides of the cushion after inflation and deployment are pinched by the occupant and the side door, the joint releases the joint when the tension applied to the joint exceeds the predetermined value. Then, the size of the cushion in the vehicle width direction increases, and by lowering the internal pressure, the impact energy received from the head of the occupant can be sufficiently absorbed, and the deterioration of the head injury value can be prevented.

According to the present invention, it is possible to maintain the appropriate internal pressure of the cushion even when the inflated and deployed cushion is pinched between the occupants or between the occupant and the side door, thereby protecting the occupants more fully. A side airbag device can be provided.

It is a figure showing an example of a part of vehicles to which a side airbag device in an embodiment of the present invention is applied. It is a figure explaining the cushion of FIG.1 (b), and a modification. It is a figure which illustrates the state which looked at the vehicle outer side from the vehicle width direction center side to the side airbag apparatus of FIG.1 (b). It is a figure which illustrates the side airbag apparatus of FIG.1 (b). FIG. 5 is a view illustrating a side airbag device when two occupants are seated in the vehicle of FIG. 4; It is a figure which illustrates the other modification of the cushion of FIG. It is a figure which illustrates the further another modification of the cushion of FIG.

DESCRIPTION OF SYMBOLS 100 ... Side airbag apparatus, 102 ... Vehicle, 104, 110 ... Seat for vehicles, 106, 112 ... Seat back, 108, 114 ... Seat cushion, 116 ... Side door, 118, 118A, 118B, 118C ... Cushion, 120 ... Inflator, 122, 146 ... occupant, 124, 124A ...

first panel

126, 126A ...

second panel

128, 128A, 128B ...

third panel

130, 130A ...

tear seam

132, 132A ... top edge of first panel , 134, 138 ... sewing line, 136, 136A ... upper edge of

second panel

140, 148 ... head of occupant, 142 ... upper end of cushion, 144 ... ceiling of vehicle, 150 ... convex portion of tear seam, 152 ... vent hole

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values and the like shown in the embodiments are merely examples for facilitating the understanding of the invention, and the invention is not limited except as otherwise described. In the present specification and drawings, elements having substantially the same functions and configurations are denoted by the same reference numerals to omit repeated description, and elements not directly related to the present invention are not illustrated. Do.

FIG. 1 is a view showing a part of a vehicle 102 to which a side airbag device 100 according to an embodiment of the present invention is applied. As shown by a dotted line in FIG. 1A, the side airbag device 100 is embedded in a side portion on the vehicle center side of the seat back 106 of the vehicle seat 104. The vehicle seat 104 is a right front seat (for example, a driver's seat) in the vehicle 102 and, in addition to the seat back 106, has a seat cushion 108 on which an occupant sits.

In the vehicle 102, a vehicle seat 110 adjacent to the vehicle seat 102 is disposed. The vehicle seat 110 is a left front seat (for example, a front passenger seat), and includes a seat back 112 and a seat cushion 114. Further, the side door 116 is located on the vehicle outer side of the vehicle seat 110. The side airbag device 100 may be embedded in the side surface of the vehicle seat 110 on the center side of the vehicle.

The side airbag device 100 includes a bag-like cushion 118 as shown in FIG. 1 (b). The cushion 118 is inflated and deployed to the side of the occupant 122 (see FIG. 3) of the vehicle seat 104 using the gas supplied from the inflator 120 which is a gas generator. The cushion 118 is formed in a bag shape, for example, by sewing the base fabric forming the surface on the front and back, or by using OPW (One-Piece Woven).

The cushion 118 shown in FIG. 1 (b) is a base cloth separate from the first panel 124 on the side closer to the occupant, the second panel 126 on the side farther from the occupant, and the first panel 124 and the second panel 126. It includes a third panel 128 and a tear seam 130 as a joint.

FIG. 2 is a view for explaining the cushion 118 and a modification of FIG. FIG. 2A is a side view showing the cushion 118 in an expanded state. FIG. 2 (b) is a cross-sectional view taken along line AA of FIG. 2 (a). FIG. 2 (c) is a cross-sectional view showing a modified example of the cushion 118.

The third panel 128 is sewn to the upper edge 132 of the first panel 124 at the sewing line 134 so as to be continuous with the upper edge 132 and extends toward the inside of the cushion 118 as shown in FIG. ing. Furthermore, the third panel 128 is continuous with the upper edge 136 by being folded inside the cushion 118 and sewn to the upper edge 136 of the second panel 126 at the sewing line 138.

The tear seam 130 brings the

upper edges

132, 136 of the first panel 124 and the second panel 126 close to each other, and brings the third panel 128 into a relaxed state, and sews the

upper edges

132, 136 together in a breakable manner. . Therefore, the third panel 128 is maintained in a relaxed state inside the cushion 118 before the tear seam 130 shown in FIG. 2 (b) is broken. The tear seam 130 will be described later in detail, but breaks when it receives a tension exceeding a predetermined value after expansion and deployment of the cushion 118 (see FIG. 5).

The “predetermined value” of tension, which is a threshold at which breakage occurs, is a value determined according to the strength of the tear seam 130, although not specifically specified in the text. Since tension increases as the internal pressure of the cushion 118 increases, using tension as a threshold is equivalent to using the internal pressure of the cushion 118 as a threshold. Therefore, an excessive increase in the internal pressure of the cushion 118 can be suppressed. The same applies to the case where means other than the tear seam 130 is used as the joint.

In the cushion 118 shown in FIG. 2B, the third panel 128 is a base cloth separate from the first panel 124 and the second panel 126, but is not limited thereto. As an example, like the cushion 118A shown in FIG. 2C, the first panel 124A, the second panel 126A, and the third panel 128A may be configured by one base cloth.

In the cushion 118A, the third panel 128A extends continuously toward the inside of the cushion 118A continuously with the upper edge 132A of the first panel 124A, and is further folded back and continuous with the upper edge 136A of the second panel 126A. The tear seam 130 is sewn so as to be broken in a state in which the

upper edges

132A and 136A of the first panel 124A and the second panel are brought close to each other. Even with such a cushion 118A, the third panel 128A can be maintained in a relaxed state inside the cushion 118A before the tear seam 130 is broken.

FIG. 3 is a view exemplifying a state in which the side airbag apparatus 100 of FIG. 1B is viewed from the center side in the vehicle width direction as viewed from the vehicle outer side. In the drawing, an occupant 122 (driver) seated on a vehicle seat 104 is shown.

The third panel 128 of the cushion 118 overlaps the head 140 of the occupant 122 in a side view as shown. The tear seam 130 extends along the upper end 142 of the cushion 118 in the vehicle longitudinal direction so as to cover the head 140 of the occupant 122. For this reason, the third panel 128 and a part of the tear seam 130 overlap a portion of the cushion 118 at the time of inflation and deployment for protecting the head 140 of the occupant 122.

FIG. 4 is a view illustrating the side airbag device 100 of FIG. 1 (b). FIG. 4A shows the side airbag device 100 as viewed from the front side of the vehicle when one occupant 122 is seated. FIG. 4 (b) is a cross-sectional view taken along the line BB in FIG. 4 (a).

Further, in FIG. 4A, the vehicle 102 receives a lateral impact (see arrow C) associated with a side collision, and the occupant 122 receives a lateral impact (see arrow D) toward the center of the vehicle by inertia, and the vehicle The state of moving to the center side is shown. That is, the flow line axes of the occupant 122 accompanying the side collision are in the lateral direction (that is, the vehicle width direction) indicated by the arrows C and D.

As shown in FIG. 4A, the side airbag device 100 receives the head 140 of the occupant 122 moved in the direction indicated by the arrow D by the inflated and deployed cushion 118. Since the cushion 118 is not broken at the tear seam 130 as shown in FIG. 4B, the third panel 128 is maintained in the cushion 118 in a slack state, and the dimension in the vehicle width direction is Wa. .

The dimension Wa in the vehicle width direction of the cushion 118 can be adjusted, for example, depending on how close the

upper edges

132 and 136 of the first panel 124 and the second panel 126 are sewn by the tear seam 130. Furthermore, the dimension Wa is preset so that the cushion 118 maintains an appropriate internal pressure when the cushion 118 receives the head 140 of one occupant 122.

Therefore, when the cushion 118 receives the head 140 of one occupant 122 at the time of inflation and deployment, as shown in FIG. 4A, the cushion 118 maintains an appropriate internal pressure by obtaining the dimension Wa in the vehicle width direction. The 122 heads 140 can be protected.

Furthermore, the upper end 142 of the cushion 118 is in contact with the ceiling 144 of the vehicle 102 during inflation and deployment. For this reason, the cushion 118 is less likely to fall down when receiving the head 140 of one occupant 122, and it becomes easy to absorb impact energy, and the head 140 of the occupant 122 can be more fully protected.

Incidentally, two

vehicle seats

104 and 110 are adjacent to the vehicle 102. Therefore, the cushion 118 after expansion and deployment may receive not only the occupant 122 seated on the vehicle seat 104 but also the occupant 146 seated on the vehicle seat 110 (see FIG. 5A). Hereinafter, the behavior of the cushion 118 in such a situation will be described.

FIG. 5 is a diagram illustrating the side airbag device 100 when two

occupants

122 and 146 are seated in the vehicle 102 of FIG. 4. FIG. 5A shows the side airbag device 100 as viewed from the front side of the vehicle when two

occupants

122 and 146 are seated. FIG. 5 (b) is a cross-sectional view taken along the line EE of FIG. 5 (a).

As shown in FIG. 5A, when the cushion 118 after inflation and deployment receives the two

occupants

122 and 146 at the same time and is pinched by the two

occupants

122 and 146, the internal pressure of the cushion 118 excessively increases. Then, when the internal pressure of the cushion 118 excessively increases, the tension applied to the first panel 124 and the second panel 126 of the cushion 118 increases.

The increased tension on the first panel 124 and the second panel 126 also increases the tension on the tear seam 130. When the tension applied to the tear seam 130 exceeds a predetermined value, the tear seam 130 breaks and the sewing of the

upper edges

132 and 136 of the first panel 124 and the second panel 126 is released.

For this reason, the third panel 128 which has been slackened inside the cushion 118 is stretched between the

upper edges

132, 136 of the first panel 124 and the second panel 126, as shown in FIG. 5 (b). As a result, since the cushion 118 has a dimension Wb larger than the dimension Wa shown in FIG. 4 in the vehicle width direction, the internal pressure can be lowered.

Therefore, in the side airbag device 100, the dimension in the vehicle width direction can be increased and the internal pressure of the cushion 118 can be reduced, in a situation where the cushion 118 is sandwiched by the two

occupants

122 and 146. Thus, the cushion 118 can maintain an appropriate internal pressure, and can sufficiently absorb impact energy received from the two

occupants

122 and 146, particularly from the

heads

140 and 148, thereby preventing deterioration of the head injury value.

Further, in the side airbag device 100, as shown in FIG. 5A, the upper end 142 of the cushion 118 contacts the ceiling 144 of the vehicle 102 in a situation where the cushion 118 is sandwiched by the two

occupants

122 and 146. ing. As a result, the cushion 118 is less likely to fall down, absorbs impact energy more easily, and the

heads

140 and 148 of the

occupants

122 and 146 can be more fully protected.

FIG. 6 is a view illustrating another modified example of the cushion 118 of FIG. The cushion 118B shown in FIG. 6 (a) has a point that the tear seam 130A has a projection 150 projecting toward the inside of the cushion 118B in the middle of the

upper edges

132 and 136 of the first panel 124 and the second panel 126. It differs from the cushion 118. 6 (b) is a view showing a cross section taken along the line F--F passing through the convex portion 150 of the tear seam 130A of FIG. 6 (a).

In the cushion 118B, in the FF cross section shown in FIG. 6B, the convex portion 150 of the tear seam 130A is on the sewing line 134 and the second panel 126 of the upper edge 132 of the first panel 124 and the third panel 128. The sewing line 138 between the edge 136 and the third panel 128 is located inside the cushion 118B.

According to such a cushion 118B, stress will be concentrated on the convex portion 150 of the tear seam 130A after expansion and deployment, and the convex portion 150 can be a starting point so that the tear seam 130A can be reliably broken. Therefore, in the cushion 118B, even if the internal pressure rises excessively after expansion and deployment, if the tension applied to the tear seam 130A exceeds a predetermined value, the tear seam 130A reliably breaks, so the dimension in the vehicle width direction increases and the internal pressure decreases. be able to. Therefore, the cushion 118B can maintain the appropriate internal pressure, and can thus receive and fully protect the

heads

140, 148 of the two

occupants

122, 146.

FIG. 7 is a view illustrating still another modified example of the cushion 118 of FIG. The cushion 118C shown in FIG. 7A differs from the cushion 118 in that a vent hole 152 for exhausting gas to the outside is provided in the third panel 128B. FIG. 7B is a view showing a GG cross section passing through a vent hole 152 provided in the third panel 128B of FIG. 7A. FIG. 7C is a view showing a part of the cushion 118C after inflation and deployment including the vent hole 152. As shown in FIG.

Inside the cushion 118C, as shown in FIG. 7B, a vent hole 152 provided in the third panel 128B is located. According to such a cushion 118C, when the tear seam 130 is broken after expansion and deployment, not only the dimension in the vehicle width direction becomes large, but as shown in FIG. 7C, the vent holes provided in the third panel 128B 152 will appear. Therefore, in the cushion 118C, the internal gas is exhausted to the outside through the vent hole 152, and the internal pressure can be further reduced. Therefore, the cushion 118C can maintain the appropriate internal pressure, and thus can receive and fully protect the

heads

140, 148 of the two

occupants

122, 146.

In the above-mentioned embodiment, although the tear seam 130 which sews the

upper edges

132 and 136 of the 1st panel 124 and the 2nd panel 126 so that breakage is possible was illustrated as a junction, it is not limited to this. That is, as long as the joint portion joins the

upper edges

132 and 136 of the first panel 124 and the second panel 126 and receives a tension exceeding a predetermined value when the cushion 118 inflates and deploys, it has the function of releasing the joint. Good. Therefore, the bonding portion may be, for example, an adhesive that releasably adheres the

upper edges

132 and 136 of the first panel 124 and the second panel 126.

Further, in the

cushions

118B and 118C shown in FIGS. 6 and 7, the

third panels

128 and 128B are different from the first panel 124 and the second panel 126, but are not limited thereto. As an example, the first panel 124, the second panel 126 and the third panel 128, 128b may be formed by an integral backing, such as the cushion 118A shown in FIG. 2 (c).

In the above embodiment, the side airbag device 100 is positioned between the

adjacent vehicle seats

104 and 110, and the cushion 118 after inflation and deployment simultaneously receives the two

occupants

122 and 146 on both sides. Although the situation in which the cushion 118 is pinched by the

occupants

122 and 146 is illustrated, it is not limited thereto. That is, the side airbag device 100 may be embedded in the side surface of the

vehicle seat

104, 110 outside the seat back 106, 112 in the vehicle width direction. In this case, there may be a situation where the cushion 118 after inflation and deployment is pinched by the occupant 122 and a side door (not shown) or the occupant 146 and the side door 116 (see FIG. 1A).

Furthermore, although the said embodiment demonstrated the case where the side airbag apparatus 100 was applied to the vehicle 102 provided with the two

sheets

104 and 110 for vehicles, it is not limited to this. As an example, the side airbag device 100 may be applied to a single-seat electric vehicle, a so-called micro EV. The micro EV is a vehicle equipped with one vehicle seat. In such a vehicle, the side airbag device 100 is positioned between the vehicle seat and the side door, and there may be a situation where the cushion 118 after inflation and deployment is caught between the occupant and the side door.

Under any circumstances, in the side air bag device 100, when the tension applied to the joint with the rise of the internal pressure of the cushion 118 exceeds a predetermined value, the joint can release the joint. Therefore, in the cushion 118, the dimension in the vehicle width direction is increased, and the internal pressure can be reduced. Therefore, according to the side airbag device 100, the cushion 118 can maintain an appropriate internal pressure, so that the cushion 118 can sufficiently absorb impact energy and prevent deterioration of the head injury value by receiving the occupant's head. it can.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is obvious that those skilled in the art can conceive of various changes or modifications within the scope of the claims, and it is understood that they are naturally within the technical scope of the present invention. Be done.

Further, although the example in which the side airbag apparatus 100 according to the present invention is applied to a car has been described in the above embodiment, the present invention can also be applied to an aircraft or a ship other than a car. be able to.

The present invention can be applied to a side airbag device provided with a bag-like cushion that is inflated and deployed to the side of the occupant of the vehicle seat at the time of a side collision or the like of the vehicle.

Claims

In a side airbag device provided on a side of a seat back of a vehicle seat and having a bag-like cushion that inflates and deploys to the side of an occupant of the vehicle seat using gas supplied from an inflator.
The cushion is
The first panel closer to the occupant,
The second panel far from the occupant,
A joint that joins upper edges of the first panel and the second panel;
And a third panel continuous with the upper edge of the first panel and extending toward the inside of the cushion and further folded back to be continuous with the upper edge of the second panel;
The side airbag device according to claim 1, wherein the joint portion releases the joint when receiving tension exceeding a predetermined value at the time of inflation and deployment of the cushion.
The side airbag device according to claim 1, wherein the joint portion is a tear seam that sews the upper edges of the first panel and the second panel in a breakable manner.
The side airbag device according to claim 1, wherein the joint portion is an adhesive that releasably adheres the upper edges of the first panel and the second panel.
The third panel is a base fabric separate from the first panel and the second panel which is continuous to the upper edge by being sewn to the upper edge of the first panel and the second panel, respectively. The side airbag apparatus of any one of Claim 1 to 3 characterized by the above-mentioned.
The side air bag device according to any one of claims 1 to 3, wherein the first panel, the second panel, and the third panel are formed of one base cloth.
The said junction part has a convex part which protrudes toward the inside of the said cushion in the middle of the upper edge of the said 1st panel and a 2nd panel, The any one of Claim 1 to 5 characterized by the above-mentioned. Side airbag device.
The side airbag device according to any one of claims 1 to 6, wherein the third panel has a vent hole for exhausting a gas to the outside.
The cushion is located between the vehicle seat and an adjacent seat adjacent in the vehicle width direction of the vehicle seat, and the upper end of the cushion contacts the ceiling of the vehicle when inflated and deployed. The side airbag device according to any one of 1 to 7.
The said airbag is located between the said vehicle seat and a side door, The side airbag apparatus of any one of Claim 1 to 7 characterized by the above-mentioned.