JP6427307B2 - Side airbag device - Google Patents

Description

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

  It is known to provide a vehicle with one or more airbags to protect the occupant in the event of a vehicle accident. The air bag is, for example, a so-called driver's air bag which inflates from near the center of the steering wheel of the car, protects the driver, deploys downward inside the window of the car, and performs lateral impact or rollover of the vehicle. There are various forms, such as a curtain airbag that protects the occupant in the event of a rollover accident, and a side airbag that is deployed between the occupant and the side panel to protect the occupant in the event of a lateral impact of the vehicle. The present invention relates to a side airbag device provided in a vehicle seat.

  The "airbag" of Patent Document 1 has an object to provide an air bag which can increase the thickness of a desired portion and widen the spread width of the portion, and the air bag comprises a first panel and a second panel. Are layered in a plane, and the peripheral edge portion is sealed with an outer peripheral seam to form a bag shape. Inside the air bag, the proximal end of the tether is joined to the upper end of the outer peripheral seam, and the distal end of the tether is joined to the thickness regulating portion. In the inflated and deployed state of the airbag, a deployment surface extending in the lateral direction of the vehicle is formed by the tether being tensioned therein. Then, a shoulder restraint portion is formed in the airbag as a thickness increasing region that promotes the expansion in the lateral direction of the vehicle as much as the deployment surface is formed.

  Patent Literatures 2 and 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 in which the vent hole is blocked by the door or the occupant when the air bag is deployed.

JP, 2006-224817, A Japanese Patent Application Laid-Open No. 11-78767 JP-A-8-225054

  By the way, in patent document 1, when adjusting the expansion form of an air bag, such as enlarging the deployment width of an air bag, a tether is provided in two panels, and there are many parts number, and, for that reason There is a problem that the assembling operation and the sewing operation are also complicated.

  Further, in the air bag devices described in Patent Documents 2 and 3, there is a possibility that the vent holes may not be opened quickly, 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, and at the same time as securely restraining the occupant, the thickness of the end portion provided with the vent hole at the time of deployment of the air bag is sufficiently secured, and the vent hole is promptly It is an object of the present invention to provide a side airbag that can optimize the deployment behavior of the airbag by opening the door.

  In order to solve the above problems, the present invention is a side airbag device that protects an occupant by inflating and deploying at the side of a vehicle seat, the airbag including a main base fabric facing each other at the time of folding; the airbag And an inflator for supplying inflation gas to the vehicle. The air bag has an additional cloth having an outer shape along the shape of the peripheral portion at the peripheral portion of the main base fabric. The additional fabric is bonded to the main base in the vicinity of the peripheral portion, and the additional fabric is folded inside of the airbag, and a pair of mountain ridges and a valley are formed between the pair of mountain ridges. It is formed. Further, the additional fabric includes a vent hole formed across the bottom of the valley.

  The additional fabric is configured to include a semi-partitioned portion having a graphic shape congruent with a straight line connecting between any two points of the peripheral portion of the airbag and a region surrounded by the peripheral portion between the two points. And the additional fabric has one side having a straight portion having the same length as a straight line connecting the two points of the half section as the valley bottom, and the two halfs are symmetrical with respect to the straight portion. The compartments can be of a combined shape.

The additional fabric may be configured to extend in the vertical direction of the vehicle at an end portion of the airbag in front of the vehicle.

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

The vent hole may be configured to be positioned at the foremost part of the inflated air bag when the air bag is deployed. Further, when the air bag is deployed, the vent hole can be configured to be located above the center in the vertical direction of the inflated air bag and located near the shoulder of the occupant.
By adopting such a structure, the vicinity of the shoulder of the occupant contacts the airbag first, so that the internal pressure of the airbag can be quickly and reliably reduced at that portion, and the occupant's damage is minimized. Can be suppressed.

  The air bag may be formed of a single base cloth and may have a sewn edge.

The additional cloth may extend in the longitudinal direction of the vehicle at the end of the vehicle in the vertical direction 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 longitudinal direction of the airbag.

  The additional fabric may be in the shape of a square, and the valley bottom may be configured by the diagonal of the square. Here, the square may have a diamond shape.

The valley bottom of the valley can be formed in the center between the pair of mountain ridges in a state in which the additional fabric is opened. The valley bottom may extend through the center of the vent hole.
When such a structure is adopted, the vent hole is bent in the stored state of the air bag, and the vent hole is opened promptly at the initial stage of the expansion of the air bag. Further, the open timing of the vent hole can be easily grasped, and the control of the internal pressure according to the deployment stage of the airbag can be performed more precisely.

In the vicinity of the pair of mountain ridges, holes penetrating the base fabric are provided in the respective mountain ridges,
There are further provided string-like members passing through the respective holes,
It is possible to further include a cord-like member cutting device capable of cutting the cord-like member when the air bag is inflated and deployed.

  The respective holes may be provided in the non-inflated part of the airbag.

  Each of the holes may be provided at a position where at least a part of the holes overlap when the ridge portion is overlapped in the folded state of the air bag.

The cord-shaped member cutting device can control the cutting of the cord-shaped member so that the vent hole is closed before the operation of the cutting device, and the vent hole is opened after the operation of the cutting device. .

FIG. 1 shows a state in which the side airbag according to the present invention has been deployed as observed from the outside in the vehicle width direction. FIG. 2 is a front view showing an outline of the operating state of the side airbag apparatus according to the first embodiment of the present invention, and shows a state in which an inflated bag body and a vehicle seat are viewed from the front of the vehicle. FIG. 3 is a developed view of a base fabric forming the bag body of the side airbag device according to the first embodiment. 4A and 4B show the structure of an air bag apparatus constructed 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 A-A of FIG. FIG. 5 is a developed view of a base fabric forming a bag body of a side airbag device according to a modification of the first embodiment. 6A and 6B show the structure of an air bag 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 taken along line AA in FIG. FIG. 7 shows the structure of the side airbag apparatus according to the second embodiment of the present invention, in which (A) is a plan view and (B) is a partially enlarged view of (A). FIG. 8 is a developed view showing the shapes of a base cloth and an additional cloth forming the air bag body shown in FIG. FIG. 9 is a developed view showing the shapes of an air bag base cloth and an additional cloth used in a side air bag apparatus according to a third embodiment of the present invention.

  First, a vehicle seat equipped with a side airbag device according to the present invention will be described based on the attached drawings. The "front" shown in each figure is the front (traveling direction) of the vehicle, the "rear" is the back of the vehicle (opposite to the traveling direction), and the "in" is the inside of the vehicle width (passenger side) The "outside" indicates the outer side (door panel side) in the vehicle width direction. In addition, "left" and "right" indicate the left side and the right side respectively in the traveling direction of the vehicle. Furthermore, “upper” and “lower” indicate directions perpendicular to “front and rear” and “right and left”, and the head direction of the occupant seated from the center of the vehicle is “upper” and the foot lower direction is “lower”.

FIG. 1 shows a state in which the side airbag according to the present invention has been deployed as observed from the outside in the vehicle width direction. FIG. 2 is a front view showing an outline of the operating state of the side airbag apparatus according to the first embodiment of the present invention, and shows a state in which an inflated bag body and a vehicle seat are viewed from the front of the vehicle.
The side airbag apparatus 10 which concerns on a present Example is accommodated in the inside of the seat back 1 of a vehicle seat (1, 2, 3). For example, when the inflation gas is introduced inside, the airbag 12 stored in the driver's seat or the passenger's seat inflates and deploys from the seat back 1 toward the front of the passenger compartment at a position on the occupant side. The deployed air bag 12 is located, for example, in a gap between a passenger sitting on a vehicle seat and a vehicle interior surface such as a B pillar facing the passenger or a vehicle door, and the passenger from the vehicle compartment width direction Protect.
In addition, the code | symbol 2 shows the seat cushion of the part which a passenger | crew seats, and the code | symbol 3 shows the headrest connected with the upper end of the seat back 1. FIG.

  FIG. 3 is a developed view of the base cloth 14 forming 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 device 10 configured using the base fabric shown in FIG. 3, in which FIG. 4A is a plan view and FIG. 4B is a cross-sectional view taken along line A-A of FIG. .

  The air bag 12 is made of a base cloth 14 formed of various known materials. In the present embodiment, the airbag 12 is formed by forming a single base cloth 14 into a bag shape. Specifically, the base fabric 14 is formed in a bag shape by being folded in two and joining the outer peripheral edge by sewing 18. As shown in FIG. 4, an inflator 22 is disposed inside the bag-like shaped air bag 12, and the gas released from the inflator 22 inflates the air bag 12. The contours of the base cloth 14 shown in FIGS. 3 and 4 are merely examples, and various contours can be adopted.

  At the end of the base 14 forming the air bag 12 at the front of the vehicle, there are mountain ridges L1 and L2 which are a pair of mountain fold lines extending in the vertical direction of the vehicle, and an air bag between the pair of mountain ridges L1 and L2 A valley extending in the vertical direction of the vehicle at two points 14a and 14b in the peripheral portion of 12 and a valley bottom to be folded inside of the airbag 12 and a valley bottom L3 which is a valley-folded portion at the bottom of the valley are formed There is. In addition, 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 oval long in the vertical direction can be adopted. However, it is important to be located in the range between the ridges L1 and L2 and to form over the valley bottom L3.

  The pair of mountain ridges L1 and L2 and the valley bottom L3 are parallel to each other, and the valley bottom L3 extends to the center of the pair of ridges L1 and L2. That is, the distance D1 between the ridge portion L1 and the valley bottom L3 and the distance D2 between the ridge portion L3 and the valley bottom L2 are set to be the same. Here, a portion surrounded by the ridge portion L1 and the valley bottom portion L3 forms a half section 21a. Similarly, a portion surrounded by the ridge portion L2 and the valley bottom L3 also forms a half partition 21b. The half sections 21a and 21b are configured to be line symmetrical with respect to the straight part forming the valley bottom L3. As a result, the front portion of the airbag 12 can be deployed quickly without being biased to the left and right.

  Also, the valley bottom L3 extends through the center of the vent hole 16. With such a configuration, it is possible to prevent the situation in which the vent holes 16 are promptly opened and the vent holes 16 are in close contact with a part of the base cloth 14 adjacent to each other to delay the exhaust. This is because, in the structure having the folds L1, L2 and L3 at the front, the air bag 12 operates so as to open the fold portion before the airbag 12 is fully inflated.

  In addition, it is preferable to arrange the vent hole 16 so as to be positioned at the foremost part of the inflated air bag 12 when the air bag 12 is deployed. When the vent hole 16 is formed to be biased in the vehicle width direction, the vent hole 16 may come into contact with or approach the occupant or the inner surface of the vehicle, which may prevent the prompt and reliable exhaust operation. Such problems can be avoided by the present invention.

  Furthermore, when the air bag 12 is deployed, it is preferable to arrange the vent hole 16 above the vertically central position H of the inflated air bag 12 and in the vicinity of the shoulder of the occupant. In the sitting state, the occupant (person) projects near the shoulder most at the left and right, and the vicinity of the shoulder tends to contact the airbag 12 first, and by providing the vent hole 16 in the vicinity, the airbag The internal pressure of 12 can be quickly and surely depressurized, and damage to the occupant can be minimized.

  In this embodiment, a thickness forming portion (machi portion) 30 including a V-shaped valley portion between the pair of mountain ridge portions L1 and L2 on the base fabric 14 by the mountain ridge portions L1 and L2 and the valley bottom L3. Is formed. That is, the front end portion of the airbag 12 can be provided with a spread (mitch / thickness) in the vehicle compartment width direction. As described above, the arrangement of the mountain ridges L1 and L2 and the valley bottom L3 (setting of D1 and D2) makes it possible to control the spread of the airbag 12 at the time of deployment. In FIG. 4B, for convenience of explanation, the folds (L1, L2, L3) in the valley portion are U-shaped, but in actuality, they have an acute-angled shape 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 portion is positioned to expand toward the periphery of the occupant's shoulder. The airbag 12 in which inflation gas flows from the inflator 22 and starts to be inflated is located in the gap between the occupant and the vehicle interior surface, and protects the occupant from the width direction of the vehicle compartment.

  In the V-shaped thickness forming portion 30, the pressure of the expansion gas causes the valley bottom portion L3 to protrude outward from the inside of the valley portion, thereby opening the bent hole 16 at the same time as the pair of mountain ridge portions L1. , L2 expand apart from one another. The expansion mode 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 can be exhibited.

As a modification of the first embodiment shown in FIGS. 3 and 4, the structure shown in FIGS. 5 and 6 can be adopted. In the modification shown in FIGS. 5 and 6, the components corresponding to those of the first embodiment shown in FIGS. 3 and 4 are denoted by the same reference numerals, and the redundant description will be omitted.
The modification shown in FIGS. 5 and 6 differs from the first embodiment in the developed shape of the base cloth of the air bag 14. As shown in FIG. 5, the upper edge and the lower edge of the base fabric which the ridges L1, L2 and the end of the valley bottom L3 reach are straight without being curved.

  As shown in FIG. 6, in the present modification, the length (height) of the front end portion of the airbag 14 in the vertical direction is longer than that of the rear end portion. As a result, the length of the ridge portions L1 and L2 can be formed to be equal to or longer than the length of the valley bottom L3. As a result, the front end portion of the air bag 14 can be widely spread, and the air bag 14 can be inflated and deployed more smoothly. The other effects and advantages are the same as in the first embodiment.

  In the first embodiment (FIG. 3 and FIG. 4) and its modification (FIG. 5 and FIG. 6) described above, for example, the thickness forming portion 30 including the valley portion is extended in the vehicle longitudinal direction at the upper and lower ends of the airbag 12 Can also be formed. Also in this case, it is possible to obtain the same effect as that of the above embodiment.

  FIG. 7 shows the structure of the side airbag apparatus according to the second embodiment of the present invention, in which (A) is a plan view and (B) is a partially enlarged view of (A). FIG. 8 is a developed view showing the shapes of a base cloth and an additional cloth forming the air bag body shown in FIG. The side airbag device according to the present embodiment includes an airbag main body formed of main base fabrics 114 (114a and 114b) facing each other at the time of folding; and an inflator 122 which supplies inflation gas to the airbag. As shown in FIG. 8, the air bag is surrounded by an edge 117 extending in the vehicle vertical direction from an edge 116 extending in the vehicle longitudinal direction after bag formation (after sewing) at the peripheral portion of the two main base fabrics 114a and 114b. At an end portion of the airbag formed, an additional cloth 132 having an outer shape along the peripheral shape is provided. The main base cloth 114 does not necessarily have a structure in which two sheets are bonded to each other, and one sheet of cloth may be folded and formed as in the first embodiment.

  In FIG. 7, the main base fabrics 114a and 114b are sewn together at the periphery by sewing 118 and are thereby formed into a bag shape. Inside the air bag, a small bag-like bag 130 called an inner tube is disposed, and the inflation gas released from the inflator 122 first enters the inner tube 130 and then the vent holes 130a and 130b inside the air bag. The entire air bag is filled via the air bag. The inner tube 130 is mainly provided to reduce the damage to the occupant of the OOP (non-regular riding position).

  The additional fabric 132 is bonded to the main fabric in the vicinity of the peripheral portion of the main fabric 114a, 114b. The additional cloth 132 is folded inside the airbag to form a valley between the pair of ridges 133a and 133b and the pair of ridges 133a and 133b. The ridge lines shown by the ridge portions 133a and 133b may be bent and formed so as to have the apexes (133a1 and 133b1). In addition, the additional cloth 132 is provided with a vent hole 120 formed across the valley bottom portion 134 of the valley portion.

  As shown in FIG. 8, the two main base fabrics 114a and 114b have the same shape, and are sewn together from both the left and right sides in a direction in which the center of the figure is valley-folded. The additional cloth 132 described above is connected by sewing near the lower end portions of the main base cloths 114a and 114b.

  In the present embodiment, the shape of the additional fabric 132 is a quadrangle (rhombic), and the side a of the base fabric 114a and the side a of the additional fabric 132 face each other, and the side c of the basic fabric 114a and the side of the additional fabric 132 c faces each other. Here, a quadrangle is a figure which has four vertices and is surrounded by four line segments. The line segment is mainly composed of a straight line, but in the present invention, it is not limited to a straight line, and may be composed of a curved line or a combination of a straight line and a curved line. Similarly, the side b of the base fabric 114b and the side b of the additional fabric 132 face each other, and the side d of the base fabric 114b and the side d of the additional fabric 132 face each other. The lengths of these same symbols (a, b, c, d) are basically the same. In other words, the additional fabric 132 is congruent with a straight line connecting between any two points of the peripheral portions of the main base fabrics 114a and 114b and a region surrounded by the peripheral portions of the two points (135ab1, 135ab2). It comprises two half compartments (139a, 139b) having a figure shape (137a, 137b). In addition, one side of the additional fabric 132 having a straight portion that is the same as a straight line connecting the two points in the half section is a valley bottom portion 134, and the two portions are line symmetrical in this straight portion (valley bottom portion). It has a shape in which the half compartments (139a, 139b) are joined.

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

  In the vicinity of the outer edge of the left and right mountain ridge portions 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. Then, the holes 136a of the main base fabric 114a and the holes 138a of the additional fabric 132 overlap, and the holes 136b of the main base fabric 114b and the holes 138b of the additional fabric 132 overlap, so that two through holes are formed.

  In the present embodiment, a cutting device (not shown) for cutting the string-like member 140 when the air bag is inflated and deployed is provided. Then, in a state before the operation of the cutting device, tension is applied to the string-like member 140, the mountain ridge portions 133a and 133b overlap each other, and the vent hole 120 is closed. When the cord-like member 140 is cut by the operation of the cutting device, the tension of the cord-like member 140 is released, the mountain ridge portions 133a and 133b open in the direction away from each other, and the vent hole 120 opens to inflate the airbag. Gas is released to the outside.

  As shown in FIG. 7B, sewing 142 and 144 are applied to surround the periphery of the two pairs of holes (136a + 138a) and (136b + 138b). As a result, the portion outside the stitching 142 and 144 (side of the apexes 133a1 and 133b1) is isolated from the inflation region of the airbag, and a non-inflatable portion is formed around the two pairs of holes (136a + 138a) and (136b + 138b) . Alternatively, one of the additional cloth or the main base cloth may be cut away in the vicinity of the through hole, and the portion may be sewn in a manner to avoid it. Then, the portion of the hole becomes a non-inflatable portion (non-bag-like portion) in which only one base cloth is present.

  FIG. 9 is a developed view showing the shapes of airbag base fabrics 214a and 214b and additional fabric 232 used in a side airbag apparatus according to a third embodiment of the present invention. The difference from the second embodiment described above is the shape and size of the additional fabric, and the joining position of the main fabric and the additional fabric. The other configurations are substantially the same, and in the reference numerals of the corresponding components, in the second embodiment, the hundreds digit is 1 and in the third embodiment the hundreds digit is 2.

  Also in the present embodiment, the shape of the additional fabric 232 is a quadrangle (diamond), and the side a of the base fabric 214a and the side a of the additional fabric 232 face each other, and the side c of the basic fabric 214a and the side of the additional fabric 232 c faces each other. Similarly, the side b of the base fabric 214b and the side b of the additional fabric 232 face each other, and the side d of the base fabric 214b and the side d of the additional fabric 232 face each other. The lengths of these same symbols (a, b, c, d) are basically the same. In other words, the additional fabric 232 is congruent with a straight line connecting between any two points of the peripheral portions of the main base fabrics 214a and 214b and a region surrounded by the peripheral portions of the two points (235ab1, 235ab2). It comprises two half compartments (239a, 239b) having a figure shape (237a, 237b). Further, the additional cloth 232 has one side having a straight line portion which is the same as a straight line connecting the two points of the half section as a valley bottom portion 234, and the two lines are symmetrical in this straight line portion (valley bottom portion). It has a shape in which the half compartments (239a, 239b) are joined.

  In the present embodiment, holes 236a, 236b, 238a, 238b through which the string-like member 140 passes are provided in the main base fabrics 214a, 214b and the additional fabric 232 near the outer edges of the left and right mountain ridges. Then, the holes 236a of the main base cloth 214a and the holes 238a of the additional cloth 232 overlap, and the holes 236b of the main base cloth 214b and the holes 238b of the additional cloth 232 overlap to form two through holes.

  When the additional cloth 232 is folded inside the airbag, a valley is formed between the pair of mountain ridges (equivalent to 133a and 133b) and the pair of mountain ridges. Further, the additional cloth 232 is provided with a vent hole 220 formed across the valley bottom 234 of the valley. The operation and operation of the third embodiment are the same as those of the above-described second embodiment, and duplicate explanations are omitted.

  The vehicle side airbag described above is a preferable example of the present invention, and other embodiment examples can also be implemented or carried out by various methods. In particular, the present invention is not limited to the shape, size, arrangement, and the like of the detailed parts shown in the attached drawings, unless otherwise specified. In addition, the expressions and terms used in the present specification are for the purpose of explanation and are not limited to the descriptions unless specifically stated.

  For example, the present invention is applicable not only to an airbag deployed on the near side (between the occupant and the door trim) but also to an airbag deployed on the far side (opposite to the door of the seat when viewed from the occupant). Moreover, it is also possible to combine the first embodiment and the second embodiment or the third embodiment described above.

  The side airbag of the present invention can secure the thickness of the front end at the time of deployment, so on the far side, when the occupant is in the next seat, the collision and interference with the next seat occupant can be reduced. On the other hand, when there is no occupant in the adjacent seat, it is possible to suppress the occupant from jumping out. Furthermore, even when a collision in the oblique direction of the vehicle occurs, since the front end of the bag is thick, it is possible to reduce the force by which the occupant moves diagonally forward.

Claims (12)

In a side airbag device that protects an occupant by inflating and deploying at the side of a vehicle seat,
An air bag comprising a main backing facing each other upon folding;
An inflator for supplying inflation gas to the air bag;
The air bag has an additional fabric having an outer shape along the shape of the peripheral portion at the peripheral portion of the main base fabric,
The additional fabric is bonded to the main base in the vicinity of the peripheral portion, and the additional fabric is folded inside of the airbag, and a pair of mountain ridges and a valley are formed between the pair of mountain ridges. Is formed,
The additional fabric includes a vent hole formed across the bottom of the valley,
In the vicinity of the pair of mountain ridges, holes penetrating the base fabric are provided in the respective mountain ridges,
There are further provided string-like members passing through the respective holes,
A side airbag device further comprising a cord-like member cutting device capable of cutting the cord-like member when the air bag is inflated and deployed.   The side airbag device according to claim 1, wherein each of the holes is provided in a non-inflatable portion of the airbag.   The side airbag according to claim 1 or 2, wherein each of the holes is provided at a position where at least a portion thereof overlaps when the mountain ridge portion is overlapped in a folded state of the airbag. apparatus.   The cord-like member cutting device is characterized in that the vent hole is closed before the operation of the cutting device, and the cutting of the string-like member is controlled such that the vent hole is opened after the operation of the cutting device. The side airbag apparatus according to any one of claims 1 to 3, wherein The additional fabric includes a semi-partitioned portion having a graphic shape congruent with a straight line connecting between any two points of the peripheral portion of the airbag and a region surrounded by the peripheral portion between the two points;
The additional fabric has one side having a straight portion having the same length as a straight line connecting the two points of the half section as the valley bottom, and the two half sections are symmetrical with respect to the straight section. The side airbag device according to any one of claims 1 to 4, wherein the side airbag device has a combined shape.   The side airbag device according to any one of claims 1 to 5, wherein the additional cloth extends in the vertical direction of the vehicle at an end portion of the airbag in front of the vehicle.   The side airbag device according to any one of claims 1 to 6, 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 7, wherein the vent hole is positioned at the foremost part of the inflated airbag when the airbag is deployed.   9. The air bag according to any one of claims 1 to 8, wherein the vent hole is above the vertical center of the inflated air bag when the air bag is deployed, and is located near the shoulder of the occupant. Side airbag device as described. The side airbag device according to any one of claims 1 to 5, wherein the additional cloth extends in the longitudinal direction of the vehicle at an end of the vehicle in the vertical direction of the vehicle. Side airbag device according to claim 10, characterized in that the said root portion and the front Symbol pair of Sanryo portions are parallel to each other. The said additional cloth is provided in the edge part formed by the edge extended in a vehicle up-down direction from the edge extended in the vehicle front-back direction of the said airbag, The edge part is characterized by the above-mentioned. Side airbag device.

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