JP2016060453A - Side airbag apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a side airbag apparatus capable of appropriately moving a passenger's arm while suppressing an increase in the volume of a side airbag.SOLUTION: A side airbag apparatus comprising an airbag deployed laterally of a passenger, is provided with an inner tube 4 set upright toward upward of the airbag 2 in a state in which the airbag 2 is deployed, and a first inclined surface cloth 5 laid out into a triangular inclined surface shape between the airbag 2 and the inner tube 4. A shape of the inner tube 4 is a cylindrical shape having a closed upper end 4D and a lower end 4C open into the airbag 2. Furthermore, the first inclined surface cloth 5 is stitched into one side 8 of the airbag 2 facing a passenger shoulder and stitched into a part of the inner tube 4 above the airbag 2.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a side airbag device including an airbag deployed on a side of a vehicle occupant.

  2. Description of the Related Art Conventionally, a side airbag device that deploys an airbag (side airbag) between an occupant and a door panel is known as one of airbag devices mounted on a vehicle. The side airbag functions to protect the occupant's chest and trunk by instantly inflating along the side door in the event of a vehicle collision or the like. Further, it has been studied to improve the protection by adding features to the shape of the side airbag.

  For example, there has been proposed one in which the inside of a side airbag is partitioned into a plurality of spaces, and one of the partitioned spaces is inflated and deployed below the arm portion. Moreover, what formed the inclined surface in the part contact | abutted to a passenger | crew's shoulder part among side airbags is also proposed (refer patent documents 1-4). With these structures, the arm and shoulder of the occupant can easily be lifted upward, and the pressing load on the chest by the arm can be reduced.

JP 2013-154786 A Japanese Unexamined Patent Publication No. 2014-031051 JP 2013-252773 JP JP 2010-132072

  The conventional side airbag device as described above has a structure in which the arm portion of the occupant is lifted by the inflating surface of the side airbag. Therefore, there is a problem that the side airbag itself has a larger volume and the deployment time of the side airbag tends to be longer than that of a structure that does not have a structure for lifting the arms.

  The present case has been devised in view of the problems as described above, and provides a side airbag device capable of appropriately moving an occupant's arm while suppressing an increase in the volume of the side airbag. One of the purposes. It should be noted that the present invention is not limited to this purpose, and is an operational effect that is derived from each configuration shown in “Mode for Carrying Out the Invention” to be described later. Can be positioned as a purpose.

  (1) The side airbag device disclosed herein includes an airbag that is deployed to the side of a vehicle occupant. The side airbag device has an inner tube that is formed in a cylindrical shape with an upper end closed and a lower end opened in the airbag, and that stands upright above the airbag in the deployed state of the airbag. Prepare. In addition, the airbag is sewn to one side facing the shoulder of the occupant, and is sewn upward from the airbag of the inner tube, and between the airbag and the inner tube. A first slope cloth stretched in a triangular slope shape.

(2) It is preferable that the said inner tube is arrange | positioned at the rear-end part of the said airbag by the top view.
(3) The airbag is sewn to the other side opposite to the one side, and is sewn above the airbag among the inner tubes, and the airbag and the inner tube It is preferable to provide the 2nd slope cloth stretched in the shape of a triangular slope between.
Thereby, the cone shape which has a vertex on the said inner tube and into which said 1st slope cloth and said 2nd slope cloth become a slope is formed.

(4) A stitched portion between the first slope cloth and the airbag may be connected to a stitched portion between the second slope cloth and the airbag at a front end portion of the airbag in a top view. preferable.
(5) A stitching portion between the first slope cloth and the airbag and a stitching portion between the second slope cloth and the airbag are provided on two sides, and an upper surface cloth serving as an upper surface of the airbag is provided. preferable.

(6) It is preferable that said 1st slope cloth and said 2nd slope cloth are symmetrically arrange | positioned in the vehicle width direction on both sides of the said inner tube.
For example, it is preferable that the inner tube is disposed at the center of the first slope cloth and the second slope cloth. That is, the inner tube is disposed at a position that is equidistant in a top view with respect to a stitched portion between the first slope cloth and the airbag and a stitched portion between the second slope cloth and the airbag. It is preferable.

  According to the side airbag device disclosed herein, it is possible to appropriately move the occupant's arm while suppressing an increase in the volume of the airbag.

1 is a perspective view of a vehicle seat to which a side airbag device of an embodiment is applied. It is a disassembled perspective view of a side airbag apparatus. It is a side view which shows the positional relationship of a side airbag apparatus and a passenger | crew. (A) is a top view which shows the positional relationship of a passenger | crew's arm part and shoulder part, and an airbag, (B) is the front view.

  A side airbag device as an embodiment will be described with reference to the drawings. The embodiment described below is merely an example, and there is no intention of excluding various modifications and technical applications that are not explicitly described in the following embodiment. Each configuration of the present embodiment can be implemented with various modifications without departing from the spirit of the present embodiment, and can be selected or combined as necessary.

[1. Constitution]
The side airbag device 1 is housed by being folded inside the seat back of the vehicle seat 10 and inside the side surface facing the side door. FIG. 1 shows a deployed state of a side airbag device 1 arranged on the left side of a left side seat (a passenger seat in a right-hand drive vehicle and a driver seat in a left-hand drive vehicle). 2 is a partially exploded view of the side airbag device 1 of FIG. 1, and FIG. 3 is a side view showing the positional relationship with the occupant. 4A is a top view thereof, and FIG. 4B is a front view thereof.

The side airbag device 1 is provided with an airbag 2, an inflator 3, an inner tube 4, a first slope cloth 5, and a second slope cloth 6.
The airbag 2 is a cloth bag that is deployed to the side of the occupant in the event of a vehicle collision or the like, and functions to protect the occupant's chest, torso, and waist by instantly inflating along the side door of the vehicle. To do. As shown in FIGS. 2 and 3, the airbag 2 in the deployed state is formed in a vertically long shape that covers a portion from the chest of the occupant to the torso and waist at a side view.

  For example, it is good also as a shape which cut off the upper end part (upper end part of a long side direction) in a vertically long ellipse, and it is good also as a square shape near a rectangle. However, as shown in FIG. 3, the position of the upper surface of the airbag 2 is set at least slightly below the shoulder 11 of the occupant in a side view. That is, the airbag 2 of the present embodiment is arranged slightly below the existing side airbag. In addition, the passenger | crew's shoulder part 11 is protected by the effect | action of the 1st slope cloth 5 and the 2nd slope cloth 6 which are mentioned later.

  Moreover, the shape of the airbag 2 in top view can be set arbitrarily, for example, is a flat shape extending long in the vehicle front-rear direction. As shown in FIG. 4A, the airbag 2 according to the present embodiment has an isosceles triangle shape having a vertex on the front side of the vehicle and a base on the rear side of the vehicle. That is, an isosceles triangular symmetry axis is arranged in the vehicle front-rear direction, and is shaped to enter a wedge shape between the passenger and the door panel.

  The airbag 2 is formed by stitching three base fabrics composed of an upper surface cloth 7, a first side surface cloth 8, and a second side surface cloth 9. As shown in FIG. 2, the upper surface cloth 7 is a part that becomes the upper surface of the airbag 2 and is an isosceles triangular base cloth. Further, the first side cloth 8 forms a side face on the passenger side when the airbag 2 is deployed, and the second side cloth 9 forms a side face on the door panel side and a side face on the rear side of the vehicle when the airbag 2 is deployed. Eggplant. By stitching them together, a bag-like (triangular prism-like) space is formed inside the airbag 2. The gas filled in this space is supplied from the inflator 3.

  The inflator 3 is a device that supplies a filling gas for inflating the airbag 2, and is provided inside the seat back or inside the airbag 2. Here, the supply of the filling gas is started on the condition that a large impact force is applied to the vehicle or the vehicle acceleration becomes a predetermined value or more. The method for supplying the filling gas is arbitrary, and may be a method for releasing the pressurized gas stored in the container to the outside of the container, or a method for generating the filling gas by igniting explosives. Good. These filling gases are supplied into the airbag 2 through the inner tube 4.

  The inner tube 4 is a portion serving as a flow path for the filling gas supplied from the inflator 3. The inner tube 4 is formed by sewing a cloth made of the same material as the airbag 2 into a tubular shape. A lower end 4 </ b> C of the inner tube 4 is open to the inside of the airbag 2. On the other hand, the upper part of the inner tube 4 protrudes in a columnar shape toward the outside of the airbag 2, and its upper end 4D is closed.

  The inner tube 4 of the present embodiment incorporates an inflator 3 in which filling gas discharge ports are provided at two locations, an upper surface and a lower surface. Here, a portion below the inflator 3 provided in the airbag 2 is called a first inner tube 4A, and a portion above the inflator 3 is called a second inner tube 4B. The first inner tube 4 </ b> A mainly serves as a flow path for filling gas discharged from the lower surface of the inflator 3, and the second inner tube 4 </ b> B serves as a flow path for filling gas mainly discharged from the upper surface of the inflator 3. In addition, after the inside of the second inner tube 4B is filled with the filling gas, the filling gas discharged from the upper surface of the inflator 3 flows out to the first inner tube 4A side.

  The first inner tube 4A connects the inflator 3 and the internal space of the airbag 2, and extends downward from the inflator 3. On the other hand, the second inner tube 4B functions as a post of a first slope cloth 5 and a second slope cloth 6 to be described later, extends upward from the inflator 3 and faces the outside of the airbag 2. Standing up. Further, the upper part of the second inner tube 4B has a shape that penetrates the upper surface cloth 7 from the inside of the airbag 2 and protrudes to the outside of the airbag 2, and stands upright above the upper surface cloth 7. Provided. The term “upright” as used herein means not only a state in which the seat is vertically arranged, but also a state in which the seat is placed in a slightly inclined manner along the placement direction of the chest, torso, and waist of a seated passenger in a side view. In addition, a state of standing upright while drawing a smoothly curved curve so as to wrap around the shoulder of the passenger is also included.

  Regarding the arrangement of the second inner tube 4B in a top view, the position where the second inner tube 4B penetrates the upper surface cloth 7 is set at the center in the vehicle width direction at the rear end portion of the upper surface cloth 7. That is, as shown in FIG. 4A, the second inner tube 4B is disposed at the center in the width direction at the rear end of the airbag 2 (behind the shoulder 11 of the occupant) in the top view. . The penetration part of the 2nd inner tube 4B and the upper surface cloth 7 may be stitched | sutured, and the clearance gap may be formed slightly. Further, regarding the arrangement of the second inner tube 4B in a side view, the position of the upper end 4D of the second inner tube 4B is set to be slightly above the passenger's shoulder 11 in the side view as shown in FIG. Is done.

Each of the first slope cloth 5 and the second slope cloth 6 is a triangular cloth attached on the airbag 2. These slope cloths 5 and 6 are attached so as to cover the shoulder portion 11 of the occupant located above the airbag 2 in a side view.
First, as shown in FIG. 2, the bottom side 5 </ b> A of the first slope cloth 5 is stitched linearly with respect to one side (first side cloth 8) of the airbag 2 facing the occupant's shoulder 11. The On the other hand, the apex 5B of the first slope cloth 5 is stitched to a portion of the second inner tube 4B above the upper surface cloth 7 of the airbag 2.

  2 and 3, the bottom 5A of the first slope cloth 5 is sewn so as to overlap the stitched portions of the top cloth 7 and the first side cloth 8, and the apex 5B of the first slope cloth 5 is the second inner tube 4B. A state in which the upper end 4D is sewn is shown. As shown in FIG. 3, the first slope cloth 5 is stretched between the airbag 2 and the second inner tube 4 </ b> B in a triangular slope shape, and is attached to the shoulder 11 of the occupant when the airbag 2 is deployed. It arrange | positions in the position which opposes and opposes.

  Further, the second slope cloth 6 is arranged so as to face the vehicle outer side of the first slope cloth 5 through the upper face cloth 7. The shape of the 2nd slope cloth 6 is a shape (namely, symmetrical shape) which turned the 1st slope cloth 5 upside down. Further, the bottom side 6A of the second slope cloth 6 is one side of the airbag 2 facing the door panel (the other side opposite to the one side where the bottom side 5A of the first slope cloth 5 is sewn, the second side The side cloth 9) is stitched linearly. Similar to the first slope cloth 5, the second slope cloth 6 is also stretched between the airbag 2 and the second inner tube 4B in a triangular slope shape.

  The stitched portion between the first slope cloth 5 constituting one side of the upper face cloth 7 and the airbag 2 (the upper face cloth 7 and the first side face cloth 8) has a second slope cloth 6 constituting the other side of the upper face cloth 7. It connects with the sewing part with the airbag 2 (upper surface cloth 7 and the 2nd side surface cloth 9) by the front-end part of the airbag 2 by upper surface view. Further, the apex 6B of the second slope cloth 6 is stitched to a portion of the second inner tube 4B above the upper surface cloth 7 of the airbag 2. For example, the second sloped cloth 6 is sewn to the upper end 4D of the second inner tube 4B so that the vertex 6B of the second sloped cloth 6 is substantially at the same position as the vertex 5B of the first sloped cloth 5.

  The first slope cloth 5 and the second slope cloth 6 are arranged in a triangular pyramid shape like a tent stretched on the upper face cloth 7. That is, a triangular pyramid structure is formed on the upper portion of the airbag 2 in the deployed state, with the top cloth 7 as the bottom face and the first slope cloth 5 and the second slope cloth 6 as two side faces. At this time, the first slope cloth 5 and the second slope cloth 6 are arranged symmetrically in the vehicle width direction with the second inner tube 4B interposed therebetween.

  In this triangular pyramid structure, since the upper end 4D of the second inner tube 4B is connected to the vertex 5B of the first slope cloth 5, the position of the upper end 4D is restricted so as not to be too far from the bottom 5A. Similarly, the position of the upper end 4D is restricted by the second slope cloth 6 so as not to be too far from the bottom side 6A. Therefore, the movement of the upper end 4D is limited by each of the first slope cloth 5 and the second slope cloth 6, and is easily held stably at a position where the distances to the two bottom sides 5A and 6A are the same. Thus, each of the 1st slope cloth 5 and the 2nd slope cloth 6 functions so that it may cooperate and maintain the shape of a triangular pyramid.

  Further, since the first slope cloth 5 is disposed so as to face the occupant's shoulder 11, the occupant's shoulder 11 is elastically supported by the first slope cloth 5. At this time, the normal direction of the first slope cloth 5 is a direction toward the vehicle inner side, the upper side, and the vehicle front side. Therefore, the shoulder portion 11 in contact with the first slope cloth 5 receives a reaction force from the first slope cloth 5 toward the vehicle inner side and upward and toward the front of the vehicle, and easily moves upward and toward the front of the vehicle.

[2. Action]
Here, the movement of the arm part 12 accompanying the movement of the shoulder part 11 will be described with reference to FIGS. The acting direction of the reaction force acting on the shoulder 11 of the occupant from the first slope cloth 5 is the direction toward the vehicle inner side and the vehicle front as indicated by a black arrow in FIG. In response, the shoulder 11 moves toward the inside of the vehicle and the front of the vehicle. At this time, since the occupant's arm 12 is connected to the torso via the shoulder 11, as shown by the white arrow in FIG. It moves to the front of the vehicle along the slope of the cloth 5. Accordingly, the arm portion 12 changes from the state indicated by the broken line in FIG. 4A to the state indicated by the solid line.

  In addition, the direction of reaction force in front view is a direction toward the vehicle inner side and upward as indicated by a black arrow in FIG. Accordingly, the entire arm portion 12 moves upward along the slope of the first slope cloth 5 together with the shoulder portion 11, and changes from the state indicated by the broken line in FIG. 4B to the state indicated by the solid line. Thus, by moving the occupant's shoulder 11, the base end of the arm 12 moves, and the entire arm 12 moves in parallel forward and upward of the vehicle.

[3. effect]
(1) In the side airbag device 1 described above, the first slope cloth 5 is stretched on the upper portion of the airbag 2 with the second inner tube 4B standing upright from the upper surface of the airbag 2 as a support. The first slope cloth 5 acts so as to press the shoulder 11 of the occupant forward and upward when the airbag 2 is deployed and to translate the entire arm 12 in parallel. In this way, by sliding the arm portion 12 forward and upward of the vehicle, interference between the arm portion 12 and the chest can be suppressed.

The first slope cloth 5 is stitched to the first side cloth 8 of the airbag 2 and does not increase the volume of the space filled with the gas in the inflator 3. The interference suppression effect can be improved without adversely affecting the internal pressure. Furthermore, since the force acting on the shoulder 11 of the occupant is derived from the tension of the first slope cloth 5 rather than the gas pressure, the burden on the shoulder 11 and the arm 12 of the occupant can be reduced. it can.
Thus, according to said side airbag apparatus 1, while being able to suppress the volume increase of the airbag 2, while reducing the burden concerning a passenger | crew's shoulder part 11 and arm part 12, shoulder part 11, The arm part 12 can be moved appropriately.

  In addition, the second inner tube 4B that supports the first slope cloth 5 has a smaller volume than the airbag 2, so that it is filled with a filling gas before the airbag 2 is deployed, and serves as a support having a triangular pyramid structure. Start functioning. Thereby, when the airbag 2 expand | deploys, the 1st slope cloth 5 can be stretched reliably, and the protection property of a passenger | crew's shoulder part 11 can be improved.

  (2) In said side airbag apparatus 1, 2nd inner tube 4B is arrange | positioned at the rear-end part of the airbag 2 by the top view. Thereby, the 1st slope cloth 5 can be stretched in the range over the full length of the airbag 2 in the vehicle front-back direction, and the area of a triangular slope can be increased. Therefore, the first slope cloth 5 and the shoulder portion 11 can be easily brought into contact with each other, and the shoulder portion 11 and the arm portion 12 can be slid forward and upward more reliably.

  Further, since the apex of the triangular pyramid shape is located at the rear end portion of the airbag 2, the inclination of the first slope cloth 5 can be optimized. For example, if the apex of the triangular pyramid shape is arranged near the center in the vehicle front-rear direction, the first slope cloth 5 has a posture facing the vehicle inside, and the reaction force applied from the first slope cloth 5 to the shoulder 11 Among these, the component toward the vehicle inner side increases and the component toward the front of the vehicle decreases. On the other hand, if the apex of the triangular pyramid shape is arranged at the rear end portion in the vehicle front-rear direction, the component of the reaction force toward the vehicle inner side is minimized and the component toward the vehicle front is maximized. Therefore, the effect | action which moves the shoulder part 11 and the arm part 12 to the front can be maximized.

  (3) In the side airbag device 1 described above, not only the first slope cloth 5 but also the second slope cloth 6 is stretched on the airbag 2. The second slope cloth 6 functions to maintain a triangular pyramid shape (cone shape) in cooperation with the first slope cloth 5. In this way, by providing the first slope cloth 5 and the second slope cloth 6 that form two side faces in the triangular pyramid structure, the slackness of the first slope cloth 5 and the second slope cloth 6 in the deployed state of the airbag 2 can be reduced. Looseness can be suppressed (in other words, the first slope cloth 5 and the second slope cloth 6 are pinched). Therefore, the pressing force on the shoulder 11 of the occupant can be increased.

  (4) In the side airbag device 1 described above, the stitching line (stitched portion) between the first slope cloth 5 and the airbag 2 is in the airbag with respect to the stitching line between the second slope cloth 6 and the airbag 2. 2 are connected at the front end. That is, as shown in FIG. 4A, the triangular pyramid structure is arranged so as to have a V shape with the front end facing the front of the vehicle in a top view. Thereby, the 1st slope cloth 5 and the 2nd slope cloth 6 can be made easy to enter between a passenger | crew's shoulder part 11 and a door panel, and the whole arm part 12 can be made easy to translate. Further, the shape stability of the triangular pyramid structure can be improved as compared with the case where the two stitching lines are not joined.

  (5) In the side airbag device 1 described above, the upper surface cloth 7 having a triangular shape is provided on the upper surface of the airbag 2, and the stitching line is formed along the edge. Thereby, it is possible to easily change the inclination of the surface at the boundary between the portion forming the bottom surface of the triangular pyramid structure and the other portion of the surface of the airbag 2, and further improve the shape stability of the triangular pyramid structure. be able to.

  (6) In said side airbag apparatus 1, the 1st slope cloth 5 and the 2nd slope cloth 6 are symmetrically arranged in the vehicle width direction on both sides of the 2nd inner tube 4B. For example, the second inner tube 4 </ b> B is disposed at the center of the first slope cloth 5 and the second slope cloth 6. In other words, the second inner tube 4B is connected to a stitching line that is a stitched portion between the first slope cloth 5 and the airbag 2 and a stitching line that is a stitched portion between the second slope cloth 6 and the airbag 2. These are disposed at equidistant positions when viewed from above. Thereby, the shape stability of a triangular pyramid structure can be improved. Moreover, in the side airbag device 1 applied to each of the right seat and the left seat of the vehicle, the component shapes can be made common, and the configuration can be simplified.

[4. Modified example]
Regardless of the embodiment described above, various modifications can be made without departing from the spirit of the invention. Each structure of this embodiment can be selected as needed, or may be combined appropriately. For example, in the above-described embodiment, the first slope cloth 5 and the second slope cloth 6 are stitched on the airbag 2. However, if attention is paid to the function of pressing the shoulder 11 of the passenger, The slope cloth 6 can be omitted. Further, in the above-described embodiment, the triangular pyramid structure formed on the airbag 2 is illustrated, but instead, a pyramid structure (polygonal pyramid structure) such as a quadrangular pyramid structure or a pentagonal pyramid structure is used. It is also possible to apply. By adopting at least the structure in which the first slope cloth 5 is stretched in a triangular slope shape using the inner tube 4 as a support, the same effect as in the above-described embodiment can be obtained.

  In the above-described embodiment, as illustrated in FIG. 4A, an example in which the first slope cloth 5 and the second slope cloth 6 are not sewn is illustrated, but these may be sewn together. Moreover, in the above-mentioned embodiment, although the surface between the rear end side of the 1st slope cloth 5 and the rear end side of the 2nd slope cloth 6 is open | released, you may block this surface with a base fabric. By adding these ideas, the shape of the triangular pyramid can be more easily maintained, and the effect of moving the occupant's shoulder 11 upward and toward the front of the vehicle can be enhanced.

  If the number of stitched portions of the triangular pyramid structure is increased, the folded shape in the accommodated state may be complicated. Further, since the filling gas of the inflator 3 is not supplied into the triangular pyramid structure, the first slope cloth 5 and the second slope cloth 6 may be easily loosened when the airbag 2 is deployed. Therefore, it is considered preferable to provide a certain gap in the triangular pyramid structure.

  In the above-described embodiment, the inflator 3 is connected to the two inner tubes 4. However, the structures of the inflator 3 and the inner tube 4 are not limited thereto. For example, when there is one filling gas discharge port provided in the inflator 3, the discharge port and the internal space of the airbag 2 are connected by the first inner tube 4A, and the first inner tube 4A The two inner tubes 4B may be branched. The second inner tube 4B only needs to be provided so as to stand up upward from the upper surface cloth 7 at least when the airbag 2 is deployed.

  In the above-described embodiment, the bottom side 5A of the first slope cloth 5 is illustrated as being stitched linearly with respect to the first side cloth 8. However, the bottom slope 5A may be sewn in a curved shape. The same applies to the bottom side 6A of the second slope cloth 6, and the second side cloth 9 may be sewn in a curved shape. These slope cloths 5 and 6 can sew a stitched portion to the airbag 2 in a line shape (straight line, line shape such as a curve) according to the shape of the airbag 2 in the deployed state.

DESCRIPTION OF SYMBOLS 1 Side airbag apparatus 2 Air bag 3 Inflator 4 Inner tube 4A 1st inner tube 4B 2nd inner tube 4C Lower end 4D Upper end 5 1st slope cloth 6 2nd slope cloth 7 Upper surface cloth 8 1st side cloth 9 2nd side cloth 10 Vehicle Seat 11 Shoulder 12 Arm

Claims (6)

In the side airbag device equipped with the airbag deployed on the side of the occupant,
An inner tube that is closed at the upper end and is formed into a cylindrical shape with the lower end opened in the airbag, and that stands upright above the airbag in the deployed state of the airbag;
The airbag is stitched to one side facing the occupant's shoulder, and the inner tube is stitched upward from the airbag, and a triangle is formed between the airbag and the inner tube. A first slope cloth stretched in a slope shape;
A side airbag device comprising: The side airbag device according to claim 1, wherein the inner tube is disposed at a rear end portion of the airbag in a top view. The air bag is sewn to the other side opposite to the one side, and is sewn above the air bag in the inner tube, and a triangle is formed between the air bag and the inner tube. The side airbag device according to claim 1, further comprising a second slope cloth stretched in a slope shape. A stitched portion between the first slope cloth and the airbag is connected to a stitched portion between the second slope cloth and the airbag at a front end portion of the airbag in a top view. The side airbag device according to claim 3. A stitched portion between the first slope cloth and the airbag and a stitched portion between the second slope cloth and the airbag are provided on two sides, and an upper surface cloth serving as an upper surface of the airbag is provided. The side airbag device according to claim 3 or 4. 6. The side airbag device according to claim 5, wherein the first slope cloth and the second slope cloth are arranged symmetrically in the vehicle width direction with the inner tube interposed therebetween.

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