WO2017047332A1

WO2017047332A1 - Side air bag apparatus

Info

Publication number: WO2017047332A1
Application number: PCT/JP2016/074432
Authority: WO
Inventors: 氏家　亨; 優斗小林
Original assignee: オートリブディベロップメントエービー; 氏家　亨; 優斗小林
Priority date: 2015-09-17
Filing date: 2016-08-23
Publication date: 2017-03-23
Also published as: JP6427307B2; JPWO2017047332A1

Abstract

[PROBLEM] To provide a side air bag capable of optimizing deployment motion of the air bag by ensuring a sufficient thickness at a front end part when the air bag is deployed and by, simultaneously when an occupant is surely restrained, opening a vent hole quickly. [SOLUTION] This side air bag apparatus, which expands and is deployed at a lateral portion of a vehicle seat to protect the occupant, is provided with: an air bag including main base fabrics opposed to each other when being folded; and an inflator that supplies an expansion gas to the air bag. The air bag is provided with, at the peripheral edge portion of the main base fabric, an additional fabric having an outer shape conforming to the shape of the peripheral edge portion. The additional fabric is connected to the main base fabric near the peripheral edge portion. In a configuration in which the additional fabric is folded inside the air bag, a pair of ridgeline parts is formed and a valley part is formed between the pair of ridgeline parts. Further, the additional fabric is provided with a vent hole formed across the valley bottom section of the valley part.

Description

Side airbag device

The present invention relates to a side airbag device mounted on a vehicle.

It is well known to provide a vehicle with one or more airbags to protect passengers in the event of a vehicle accident. The airbag is, for example, a so-called driver airbag that is inflated from the vicinity of the center of the steering wheel of the automobile to protect the driver, and is deployed in the downward direction inside the window of the automobile so as to impact or roll over in the lateral direction of the vehicle. There are various forms such as a curtain airbag that protects an occupant during a rollover accident, and a side airbag that is deployed between the occupant and a side panel to protect the occupant during an impact in the lateral direction of the vehicle. The present invention relates to a side airbag device provided in a vehicle seat.

The “airbag” of Patent Document 1 aims to provide an airbag that can increase the thickness of a desired portion and increase the deployment width of the portion, and the airbag includes a first panel and a second panel. Are formed in a bag shape by overlapping them in a plane and sealing the peripheral edge with an outer peripheral seam. Inside the airbag, the base end of the tether is joined to the upper end portion of the outer peripheral seam, and the tip end of the tether is joined to the thickness regulating portion. In the airbag in an inflated and deployed state, a deployment surface extending in the lateral direction of the vehicle is formed by tensioning a tether therein. And the shoulder restraint part is formed in the airbag as a thickness increase area | region which encourages the expansion | swelling of a vehicle lateral direction by the part which the deployment surface was formed.

Patent Document 2 and Patent Document 3 disclose an airbag device in which a vent hole is formed on the front surface in the deployment direction. According to this device, it is possible to avoid a situation where the vent hole is blocked by a door or an occupant when the airbag is deployed.

JP 2006-224817 A Japanese Patent Laid-Open No. 11-78767 JP-A-8-2225054

By the way, in Patent Document 1, in order to adjust the inflation form of the airbag, such as increasing the deployment width of the airbag, tethers are provided on the two panels, and the number of parts is large. In addition, there is a problem that assembly work and sewing work are also complicated.

Further, in the airbag devices described in

Patent Documents

2 and 3, the vent hole may not be quickly opened, and there is room for improvement in the stability of the exhaust operation.

The present invention has been made in view of the above situation. At the same time, the occupant is surely restrained, and at the same time, the thickness of the end portion provided with the vent hole is sufficiently secured when the airbag is deployed, and the vent hole is quickly formed. An object of the present invention is to provide a side airbag that can optimize the deployment behavior of the airbag by opening it to the front.

In order to solve the above problems, the present invention provides a side airbag device that protects an occupant by inflating and deploying at a side portion of a vehicle seat, and includes an airbag including main base fabrics that face each other when folded; And an inflator for supplying an inflation gas. The airbag includes an additional cloth having an outer shape along the shape of the peripheral portion at a peripheral edge portion of the main base fabric. The additional fabric is coupled to the main base fabric in the vicinity of the peripheral edge, and the additional fabric is folded inside the airbag, and a valley portion is formed between the pair of mountain ridge portions and the pair of mountain ridge portions. Is formed. Moreover, the said additional cloth is provided with the vent hole formed ranging over the trough bottom part of the said trough part.

The additional cloth is configured to include a straight line connecting any two points on the peripheral part of the airbag and a semi-compartment part having a figure shape congruent with a region surrounded by the peripheral part between the two points. In addition, the additional cloth is formed so that the one side having a straight line portion having the same length as the straight line connecting the two points of the half-compartment part is the valley bottom part, and the two half-stripes are symmetrical with respect to the straight line part. It can be set as the shape which combined the division part.

The additional cloth can be configured to extend in a vehicle vertical direction at an end portion of the airbag in front of the vehicle.

The pair of mountain ridges and the valley bottom can be parallel to each other. By making the folds parallel, the thickness of the airbag can be reliably ensured.

When the airbag is deployed, the vent hole can be configured to be positioned at the foremost part of the airbag inflated. In addition, when the airbag is deployed, the vent hole is located above the center of the inflated airbag in the up-down direction, and can be configured to be located near the shoulder of the occupant.
By adopting such a structure, the vicinity of the shoulder of the occupant comes into contact with the airbag first, so that the internal pressure of the airbag can be quickly and reliably reduced at that portion, and occupant damage is minimized. Can be suppressed.

The airbag can be formed of a single base fabric and has a sewn edge.

The additional cloth may be configured to extend in the vehicle front-rear direction at a vehicle vertical end of the airbag.
The additional cloth may be provided at an end portion formed by an edge extending in the vehicle vertical direction from an edge extending in the vehicle front-rear direction of the airbag.

The additional cloth may have a quadrangular shape, and the valley bottom may be configured by diagonal lines of the quadrilateral. Here, the quadrangle can be a diamond shape.

The valley bottom of the valley can be formed at the center between the pair of mountain ridges with the additional cloth opened. The bottom of the valley may extend through the center of the vent hole.
When such a structure is adopted, the vent hole bends in the accommodated state of the airbag and opens quickly at the initial stage of inflation of the airbag. Further, it becomes easy to grasp the opening timing of the vent hole, and the internal pressure can be controlled more precisely according to the deployment stage of the airbag.

In the vicinity of the pair of mountain ridges, a hole penetrating the base fabric is provided in each mountain ridge,
A string-like member that passes through each of the holes is further provided,
A cord-like member cutting device capable of cutting the cord-like member when the airbag is inflated and deployed can be further provided.

The respective holes can be provided in a non-inflated portion of the airbag.

Each of the holes can be provided at a position where at least a part of the holes overlap when the mountain ridges are overlapped with the airbag folded.

The string-like member cutting device can control the cutting of the string-like member so that the vent hole is closed before the cutting device is operated and the vent hole is opened after the cutting device is operated. .

FIG. 1 shows a state where a side airbag according to the present invention is deployed as observed from the outside in the vehicle width direction. FIG. 2 is a front view showing an outline of an operating state of the side airbag device according to the first embodiment of the present invention, and shows a state in which the inflated bag body and the vehicle seat are viewed from the front of the vehicle. FIG. 3 is a development view of the base fabric forming the bag body of the side airbag device according to the first embodiment. 4A and 4B show the structure of the airbag device constructed using the base fabric shown in FIG. 3, wherein FIG. 4A is a plan view and FIG. 4B is a cross-sectional view in the AA direction of FIG. FIG. 5 is an exploded view of the base fabric forming the bag body of the side airbag device according to the modification of the first embodiment. 6A and 6B show the structure of the airbag device configured using the base fabric shown in FIG. 5, in which FIG. 6A is a plan view and FIG. 6B is a cross-sectional view in the AA direction of FIG. 7A and 7B show the structure of a side airbag device according to the second embodiment of the present invention, in which FIG. 7A is a plan view and FIG. 7B is a partially enlarged view of FIG. FIG. 8 is a development view showing the shapes of the base fabric and the additional fabric forming the airbag main body shown in FIG. FIG. 9 is a development view showing the shapes of the airbag base fabric and the additional fabric used in the side airbag device according to the third embodiment of the present invention.

First, a vehicle seat equipped with a side airbag device according to the present invention will be described with reference to the accompanying drawings. Note that “front” displayed in each figure is the front of the vehicle (traveling direction), “rear” is the rear of the vehicle (opposite to the traveling direction), and “inside” is the inner side of the vehicle width (occupant side) "Outside" indicates the vehicle width direction outside (door panel side). “Left” and “right” respectively indicate the left side and the right side in the traveling direction of the vehicle. Further, “up” and “down” indicate directions perpendicular to “front and rear” and “left and right”, and the head direction of the occupant seated from the center of the vehicle is “up” and the foot direction is “down”.

FIG. 1 shows a state where a side airbag according to the present invention is deployed as observed from the outside in the vehicle width direction. FIG. 2 is a front view showing an outline of an operating state of the side airbag device according to the first embodiment of the present invention, and shows a state in which the inflated bag body and the vehicle seat are viewed from the front of the vehicle.
The side airbag device 10 according to the present embodiment is housed inside the seat back 1 of the vehicle seat (1, 2, 3). For example, the airbag 12 housed in the driver's seat or the passenger seat is inflated and deployed at the passenger's side position from the seat back 1 toward the front of the passenger compartment when inflation gas is introduced therein. The deployed airbag 12 is located, for example, in a gap between an occupant seated in the vehicle seat and a vehicle interior surface such as a B-pillar or a vehicle door facing the occupant, and is occupant from the vehicle interior width direction. Protect.
Reference numeral 2 denotes a seat cushion where a passenger sits, and reference numeral 3 denotes a headrest connected to the upper end of the seat back 1.

FIG. 3 is a development view of the base fabric 14 that forms the bag body (airbag) 12 of the side airbag device shown in FIGS. 1 and 2. 4A and 4B show the structure of the airbag apparatus 10 configured using the base fabric shown in FIG. 3, wherein FIG. 4A is a plan view and FIG. 4B is a cross-sectional view taken along the line AA in FIG. .

The airbag 12 is made of a base fabric 14 made of various known materials. In this embodiment, the airbag 12 is formed by forming a single base fabric 14 into a bag shape. Specifically, the base fabric 14 is formed in a bag shape by folding in half and joining the outer peripheral edge by sewing 18. As shown in FIG. 4, an inflator 22 is disposed inside a bag-shaped airbag 12, and the airbag 12 is inflated by a gas released from the inflator 22. Note that the outer contour of the base cloth 14 shown in FIGS. 3 and 4 is merely an example, and various outer contours can be employed.

At the front end of the base fabric 14 that forms the airbag 12, there are mountain ridges L1 and L2 that are a pair of mountain fold lines extending in the vehicle vertical direction, and an airbag between the pair of mountain ridges L1 and L2. A trough that extends in the vehicle vertical direction between two

points

14a and 14b on the periphery of 12 and is folded inside the airbag 12, and a trough bottom L3 that is a portion folded at the bottom of the trough is formed. Yes. A circular vent hole 16 is formed across the valley bottom L3. The shape of the vent hole 16 is not limited to a circle, and various shapes such as an ellipse that is long in the vertical direction can be adopted. However, it is important to be located within the range between the mountain ridges L1, L2 and to straddle the valley bottom L3.

The pair of mountain ridges L1, L2 and the valley bottom L3 are parallel to each other, and the valley bottom L3 extends to the center of the pair of mountain ridges L1, L2. That is, the distance D1 between the mountain ridge portion L1 and the valley bottom portion L3 and the distance D2 between the mountain ridge portion L3 and the valley bottom portion L2 are set to be the same. Here, the part enclosed by the mountain ridge part L1 and the valley bottom part L3 forms the half partition part 21a. Similarly, the part surrounded by the mountain ridge part L2 and the valley bottom part L3 also forms the half partition part 21b. The

semi-partition portions

21a and 21b are configured to be line symmetric with respect to the straight line portion that forms the valley bottom L3. Thereby, the front part of the airbag 12 can be quickly deployed without being biased left and right.

The valley bottom L3 extends through the center of the vent hole 16. With such a configuration, it is possible to avoid a situation in which the vent hole 16 is quickly opened and the exhaust is delayed due to the vent hole 16 being in close contact with a part of the adjacent base fabric 14. This is because, in the structure having the folds L1, L2, and L3 on the front side, the airbag 12 operates so as to open the fold before the airbag 12 is completely inflated.

Further, it is preferable that the vent hole 16 is disposed at the foremost part of the inflated airbag 12 when the airbag 12 is deployed. When the vent hole 16 is formed so as to be biased in the vehicle width direction, the vent hole 16 may contact or approach the occupant or the inner surface of the vehicle, and there is a risk that a quick and reliable exhaust operation is hindered. Such a problem can be avoided by the present invention.

Furthermore, when the airbag 12 is deployed, the vent hole 16 is preferably located above the center position H in the vertical direction of the airbag 12 and in the vicinity of the passenger's shoulder. In the seated state, the occupant (human) has the shoulder portion protruding most to the left and right, and the vicinity of the shoulder portion tends to come into contact with the airbag 12 first. By providing the vent hole 16 in the vicinity thereof, the airbag The internal pressure of 12 can be quickly and reliably reduced, and occupant damage can be minimized.

In the present embodiment, the thickness forming portion (gusset portion) 30 including a V-shaped valley portion between the pair of mountain ridge portions L1 and L2 on the base fabric 14 due to the mountain ridge portions L1 and L2 and the valley bottom portion L3. Is formed. That is, a spread (gusset / thickness) in the vehicle interior width direction can be provided at the front end portion of the airbag 12. In this way, the arrangement of the mountain ridges L1, L2 and the valley bottom L3 (setting of D1, D2) makes it possible to control the spread of the airbag 12 during deployment. In FIG. 4B, for convenience of explanation, the folds (L1, L2, L3) in the valleys are U-shaped, but in reality, they have an acute angle close to a V-shape.

The operation of the vehicle side airbag according to the present embodiment will be described. The airbag 12 is stored in the seat bag 1 or the like in a folded state. The thickness forming portion 30 including the V-shaped valley is positioned so as to expand toward the periphery of the shoulder of the occupant. The airbag 12 that has started to inflate when inflation gas flows in from the inflator 22 is positioned in a gap between the occupant and the vehicle interior surface, and protects the occupant from the vehicle interior width direction.

In the V-shaped thickness forming portion 30, the valley bottom portion L 3 urges outward from the inside of the valley portion due to the pressure of the expansion gas, and at the same time the bent hole 16 opened, the pair of mountain ridge portions L 1 is opened. , L2 expand so as to be separated from each other. The expansion form of the V-shaped thickness forming portion 30 can be adjusted by appropriately setting the separation distance between the pair of mountain ridge portions L1 and L2.

By the presence of the thickness forming portion 30 including the V-shaped valley portion, the thickness of the end portion of the airbag 12 at the time of inflation can be sufficiently secured, and the shoulder portion of the occupant is suitably and sufficiently restrained, Excellent occupant protection performance.

As a modification of the first embodiment shown in FIGS. 3 and 4, the structure shown in FIGS. 5 and 6 can be employed. In the modification shown in FIGS. 5 and 6, the same components as those in the first embodiment shown in FIGS. 3 and 4 are denoted by the same reference numerals, and redundant description is omitted.
The modification shown in FIGS. 5 and 6 differs from the first embodiment in the deployed shape of the base fabric of the airbag 14. As shown in FIG. 5, the upper and lower edges of the base fabric that reach the ends of the mountain ridges L1 and L2 and the valley bottom L3 are straight without being curved.

As shown in FIG. 6, in the present modification, the front end portion of the airbag 14 is longer in the vertical direction (height) than the rear end portion. Thereby, it can form so that the length of the mountain ridge parts L1 and L2 may become equal to or longer than the length of the valley bottom part L3. As a result, the front end portion of the airbag 14 is likely to expand greatly, and the airbag 14 can be inflated and deployed more smoothly. Other functions and effects are the same as in the first embodiment.

In the first embodiment (FIGS. 3 and 4) and the modified examples (FIGS. 5 and 6) described above, for example, the thickness forming portion 30 including the valley portion extends in the vehicle front-rear direction at the upper and lower ends of the airbag 12. It can also be formed. Also in this case, it is possible to obtain the same effect as in the above embodiment.

FIG. 7 shows the structure of the side airbag device according to the second embodiment of the present invention, in which (A) is a plan view and (B) is a partially enlarged view of FIG. FIG. 8 is a development view showing the shapes of the base fabric and the additional fabric forming the airbag main body shown in FIG. The side airbag device according to the present embodiment includes an airbag body formed by main base fabrics 114 (114a and 114b) facing each other when folded, and an inflator 122 that supplies inflation gas to the airbag. As shown in FIG. 8, the airbag is surrounded by an edge 117 extending in the vehicle up-down direction from an edge 116 extending in the vehicle front-rear direction after the bag is formed (after sewing) at the peripheral edge portions of the two

main base fabrics

114a, 114b. An additional cloth 132 having an outer shape along the shape of the peripheral portion is provided at the end portion of the airbag formed in this manner. The main base fabric 114 does not necessarily have a structure in which two sheets are bonded to each other, and can be formed by folding a single sheet as in the first embodiment.

In FIG. 7, the peripheral edges of the

main base fabrics

114a and 114b are sewn together by sewing 118, thereby forming a bag shape. Inside the airbag, a small bag 130 called an inner tube is disposed. The inflation gas released from the inflator 122 first enters the inner tube 130 and then passes through the

vent holes

130a and 130b inside the airbag. The entire air bag is filled through. The inner tube 130 is provided mainly to reduce the harmfulness to the occupant of the OOP (non-regular boarding position).

The additional fabric 132 is coupled to the main base fabric in the vicinity of the peripheral edge portions of the

main base fabrics

114a and 114b. As the additional cloth 132 is folded inside the airbag, a trough is formed between the pair of

mountain ridges

133a and 133b and the pair of

mountain ridges

133a and 133b. The ridge lines indicated by the

mountain ridges

133a and 133b may be formed to be bent so as to have vertices (133a1 and 133b1). Further, the additional cloth 132 includes a vent hole 120 formed across the valley bottom 134 of the valley.

As shown in FIG. 8, the two

main base fabrics

114a and 114b have the same shape, and are sewn in an overlapping manner from the left and right sides in a direction that folds the center of the figure. The additional cloth 132 described above is connected to the vicinity of the lower end of the

main base cloth

114a, 114b by sewing.

In the present embodiment, the shape of the additional cloth 132 is a square (diamond), the side a of the base cloth 114a and the side a of the additional cloth 132 are opposed, and the side c of the base cloth 114a and the side of the additional cloth 132 c is opposite. Here, the rectangle is a figure having four vertices and surrounded by four line segments. Although the said line segment is mainly comprised by the straight line, in this invention, you may comprise not only a straight line but what mixed the combination of the curve and the straight line and the curve. Similarly, the side b of the base cloth 114b and the side b of the additional cloth 132 face each other, and the side d of the base cloth 114b and the side d of the additional cloth 132 face each other. The lengths of these same codes (a, b, c, d) are basically the same. In other words, the additional cloth 132 is congruent with the area surrounded by the straight line connecting any two points on the peripheral edge of the

main base fabric

114a, 114b and the peripheral edge between the two points (135ab1, 135ab2). Two half-compartments (139a, 139b) having graphic shapes (137a, 137b) are provided. Further, the additional cloth 132 has one side having the same straight line portion as the straight line connecting the two points of the half-compartment part as a valley bottom part 134, and the two cloth parts are symmetrical with respect to the straight line part (valley bottom part). It has a shape in which the half sections (139a, 139b) are combined.

8, a vent hole 120 penetrating the additional cloth 134 is formed in the middle of the valley bottom portion 134 that extends in the vertical direction of the additional cloth 132. In FIG. 7, the additional cloth 132 is folded so that the valley bottom part 134 enters the inside of the airbag.

Near the outer edges of the left and

right mountain ridges

133a and 133b, the

main base fabrics

114a and 114b and the additional fabric 132 are provided with

holes

136a, 136b, 138a, and 138b through which the string-like member 140 passes. And the hole 136a of the main base fabric 114a and the hole 138a of the additional cloth 132 overlap, and the hole 136b of the main base cloth 114b and the hole 138b of the additional cloth 132 overlap, so that two penetrating holes are formed.

In this embodiment, there is provided a cutting device (not shown) for cutting the string-like member 140 when the airbag is inflated and deployed. In the state before the operation of the cutting device, the string-like member 140 is tensioned, the

mountain ridges

133a and 133b are overlapped, and the vent hole 120 is closed. When the string-like member 140 is cut by the operation of the cutting device, the tension of the string-like member 140 is released, the

mountain ridges

133a, 133b are opened away from each other, the vent hole 120 is opened, and the inflation in the airbag is performed. Gas is released to the outside.

As shown in FIG. 7B,

sewing

142 and 144 are performed so as to surround the periphery of the two sets of holes (136a + 138a) and (136b + 138b). As a result, the portion outside the sewing 142, 144 (on the side of the apexes 133a1, 133b1) is isolated from the inflation region of the airbag, and a non-inflated portion is formed around the two sets of holes (136a + 138a), (136b + 138b). . Alternatively, the shape may be such that the vicinity of the through hole of one of the additional fabric or the main base fabric is missing, and sewing may be performed so as to avoid that portion. If it does so, the part of a hole will turn into a non-expandable part (non-bag-like part) in which only one base fabric exists.

FIG. 9 is a developed view showing the shapes of the

airbag base fabrics

214a and 214b and the additional fabric 232 used in the side airbag device according to the third embodiment of the present invention. The difference from the second embodiment described above is the shape and size of the additional cloth and the joining position between the main base cloth and the additional cloth. The other configurations are generally the same, and in the reference numerals of corresponding components, the hundreds digit is set to 1 in the second embodiment, and the hundreds digit is set to 2 in the third embodiment.

Also in this embodiment, the shape of the additional cloth 232 is a quadrangle (diamond), the side a of the base cloth 214a and the side a of the additional cloth 232 face each other, the side c of the base cloth 214a and the side of the additional cloth 232 c is opposite. Similarly, the side b of the base cloth 214b and the side b of the additional cloth 232 face each other, and the side d of the base cloth 214b and the side d of the additional cloth 232 face each other. The lengths of these same codes (a, b, c, d) are basically the same. In other words, the additional cloth 232 is congruent with a region surrounded by a straight line connecting any two points on the peripheral edges of the

main base cloth

214a, 214b and the peripheral edge between the two points (235ab1, 235ab2). Two half-compartments (239a, 239b) having graphic shapes (237a, 237b) are provided. Further, the additional cloth 232 has one side having the same straight line portion as the straight line connecting the two points of the half section portion as a valley bottom portion 234, and the two pieces so as to be symmetrical with respect to the straight line portion (valley bottom portion). It has a shape in which the half sections (239a, 239b) are combined.

In this embodiment,

holes

236a, 236b, 238a, and 238b through which the string-like member 140 passes are provided in the

main base fabrics

214a and 214b and the additional cloth 232 in the vicinity of the outer edges of the left and right mountain ridges. Then, the hole 236a of the main fabric 214a and the hole 238a of the additional fabric 232 overlap each other, and the hole 236b of the main fabric 214b and the hole 238b of the additional fabric 232 overlap each other, thereby forming two through holes.

When the additional cloth 232 is folded inside the airbag, a trough is formed between the pair of mountain ridges (equivalent to 133a and 133b) and the pair of mountain ridges. In addition, the additional cloth 232 includes a vent hole 220 formed across the valley bottom 234 of the valley. In addition, about the effect | action and operation | movement of 3rd Example, it is the same as that of 2nd Example mentioned above, and the overlapping description is abbreviate | omitted.

The vehicle side airbag described above is a preferred example of the present invention, and other embodiments can be implemented or performed by various methods. In particular, the present invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise stated in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless otherwise specified.

For example, the present invention can be applied not only to an airbag that is deployed on the near side (between the occupant and the door trim) but also to an airbag that is deployed on the far side (opposite the seat door as viewed from the occupant). It is also possible to combine the first embodiment and the second or third embodiment described above.

Since the side airbag of the present invention can secure the thickness of the front end portion when deployed, the far side can reduce collision / interference with the occupant in the adjacent seat when the occupant is in the adjacent seat. On the other hand, when there is no passenger in the adjacent seat, it is possible to suppress the passenger from jumping out. Furthermore, even when a collision in the oblique direction of the vehicle occurs, since the front end portion of the bag is thick, it is possible to reduce the force that the occupant moves obliquely forward.

Claims

In the side airbag device that protects the occupant by inflating and deploying at the side of the vehicle seat,
An airbag including main base fabrics facing each other when folded;
An inflator for supplying inflation gas to the airbag,
The airbag has an additional fabric having an outer shape along the peripheral shape at the peripheral edge of the main base fabric,
The additional fabric is coupled to the main base fabric in the vicinity of the peripheral edge, and the additional fabric is folded inside the airbag, and a valley portion is formed between the pair of mountain ridge portions and the pair of mountain ridge portions. Formed,
The side airbag device according to claim 1, wherein the additional cloth includes a vent hole formed across the valley bottom of the valley.
The additional cloth includes a semi-compartment portion having a graphic shape congruent with a straight line connecting any two points of the peripheral portion of the airbag and a region surrounded by the peripheral portion between the two points,
The additional cloth has the two half-partitioned portions such that one side having a straight line portion having the same length as the straight line connecting the two points of the half-partitioned portion is the valley bottom portion and is symmetrical with respect to the straight line portion. The side airbag device according to claim 1, wherein the side airbag device has a shape obtained by combining the two.
The side airbag device according to claim 1 or 2, wherein the additional cloth extends in a vehicle vertical direction at an end portion of the airbag in front of the vehicle.
The side airbag device according to any one of claims 1 to 3, wherein the pair of mountain ridges and the valley bottom are parallel to each other.
The side airbag device according to any one of claims 1 to 4, wherein when the airbag is deployed, the vent hole is positioned at the foremost portion of the airbag inflated.
6. The apparatus according to claim 1, wherein, when the airbag is deployed, the vent hole is located above the center of the airbag in the up-down direction and in the vicinity of an occupant's shoulder. 6. The side airbag device as described.
The side airbag device according to any one of claims 1 to 6, wherein the airbag is formed of a single base fabric and has a sewn edge.
3. The side airbag device according to claim 1, wherein the additional cloth extends in a vehicle front-rear direction at an end portion of the airbag in a vertical direction of the vehicle.
The side airbag device according to claim 8, wherein the pair of mountain ridges and the valley bottom are parallel to each other.
The side airbag device according to claim 1 or 2, wherein the additional cloth is provided at an end portion formed by an edge extending in a vehicle vertical direction from an edge extending in the vehicle front-rear direction of the airbag.
The side airbag device according to any one of claims 1 to 10, wherein the additional cloth has a quadrangular shape, and the bottom of the valley is formed by diagonal lines of the quadrilateral.
The side airbag device according to claim 11, wherein the quadrangle has a rhombus shape.
The side airbag according to any one of claims 1 to 12, wherein a valley bottom portion of the valley portion is formed at a center between the pair of mountain ridge portions in a state where the additional cloth is opened. apparatus.
The side airbag device according to any one of claims 1 to 13, wherein the bottom of the valley extends through the center of the vent hole.
In the vicinity of the pair of mountain ridges, a hole penetrating the base fabric is provided in each mountain ridge,
A string-like member that passes through each of the holes is further provided,
The side airbag device according to any one of claims 1 to 14, further comprising a string-like member cutting device capable of cutting the string-like member when the airbag is inflated and deployed.
The side airbag device according to claim 15, wherein each of the holes is provided in a non-inflatable portion of the airbag.
17. The side airbag according to claim 15, wherein each of the holes is provided at a position where at least a part thereof overlaps when the mountain ridges are overlapped with the airbag folded. apparatus.
The cord-like member cutting device controls the cutting of the cord-like member so that the vent hole is closed before the cutting device is operated and the vent hole is opened after the cutting device is operated. The side airbag device according to any one of claims 15 to 17.