JP2019156391A - Side airbag device and side airbag manufacturing method - Google Patents

Abstract

To provide a side airbag device and a side airbag manufacturing method which inhibit a rib of an occupant from deflecting upon inflation and deployment of a side airbag, and which can improve performance for protecting the occupant.SOLUTION: A side airbag device 100 has a side airbag 108 that receives the supply of gas, thereby inflating and deploying between a vehicle seat 102 and a side door 106. The side airbag includes a first fold line 112 provided so as to descend from the back of an occupant 118 toward the front, along a longitudinal direction of an upper arm 120 of the occupant properly sitting on the vehicle seat, when viewed in a lateral direction of a vehicle. The first fold line overlaps the upper arm upon inflation and deployment. The side airbag is divided into: a first area 114 which is located above the first fold line upon inflation and deployment; and a second area 116 which is located below the first fold line, and in which an inflator 110 is stored. The first area receives the supply of gas later than the second area, and inflates and deploys later than the second area.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a side airbag device provided with a side airbag that inflates and deploys between a seat and a side door in a side collision or rollover (rollover) of a vehicle, and a side airbag manufacturing method for storing a side airbag. It is about the method.

  As a side airbag device installed in a vehicle such as an automobile, for example, a side airbag built in a side edge portion of a seat back of a vehicle seat is known. The side airbag is inflated and deployed between a seat in the vehicle and the side door, and absorbs an impact from the side of the vehicle, thereby protecting an occupant seated on the seat.

  When the side airbag is inflated and deployed, the upper arm of the occupant seated on the seat is located between the occupant's chest and the inflated side airbag as viewed from the side of the vehicle. Therefore, when the side airbag is inflated and deployed, the upper arm of the occupant strongly presses a specific rib on the chest locally and deflects the rib by the side airbag, which may increase the injury value to the occupant. .

  The side airbag described in Patent Literature 1 includes an arm facing portion that faces an arm portion of an occupant in a deployed state, and a string member that is provided on a base fabric that forms the arm facing portion. The string member has a shape in which the arm facing portion is recessed downward by pulling the base fabric inward in a state where the side airbag is deployed.

  In Patent Document 1, in the state where the side airbag is deployed, the arm facing portion pushes up the arm portion of the occupant to a position where it does not overlap the chest portion, so that the arm portion is pressed against the chest portion due to the inflation of the side airbag. While suppressing, it is said that it can fully absorb the shock toward the chest.

International Publication No. 2011/0887026

  However, in Patent Document 1, a string member is provided on the base fabric that forms the arm facing portion so that the arm facing portion is recessed downward when the side airbag is inflated and deployed. Need to pull inward. For this reason, the side airbag described in Patent Document 1 has to change the structure of the side airbag itself, and further complicates the structure.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a side airbag device and a side airbag manufacturing method that can suppress occupant's rib flexure and improve occupant protection performance when the side airbag is inflated and deployed. .

  In order to solve the above problems, a typical configuration of a side airbag device according to the present invention is a side airbag that inflates and deploys between a seat in a vehicle and a side door in response to supply of gas from an inflator. The side airbag device has a side airbag that descends from the rear side of the occupant toward the front direction along the longitudinal direction of the upper arm of the occupant normally seated on the seat as viewed from the side of the vehicle. A boundary portion that is provided on the upper arm and overlaps when inflated and deployed, so that the side airbag is positioned above the border portion when inflated and deployed, and below the border portion when inflated and deployed. The first region is divided into a second region in which the inflator is accommodated, and the first region is supplied with gas later than the second region, and is expanded and deployed later than the second region.

  Here, when the occupant is viewed from the side of the vehicle, a part of the occupant's upper arm is in a position overlapping a specific rib (for example, the second rib from the top) of the occupant's chest. Therefore, when the side airbag is inflated and deployed, the upper arm locally presses a specific rib strongly and deflects the rib by the side airbag, which may increase the injury value to the occupant.

  Therefore, in the present invention, the side airbag is provided with a boundary portion that overlaps with the upper arm of the occupant during inflation and deployment. According to such a configuration, the second region expands and deploys below the boundary portion before the first region expands and deploys above the boundary portion. In the second region, the upper arm of the occupant can be flipped up by being inflated and deployed first, so that the upper arm and the ribs do not overlap when viewed from the side of the vehicle.

  Therefore, the occupant's chest is pressed toward the center of the vehicle by the second region inflated and deployed first. However, at this time, the upper arm is no longer interposed between the second region and the specific rib. For this reason, the entire chest is directly pressed by the second region, but the specific ribs of the occupant are not strongly pressed locally.

  On the other hand, the upper arm of the occupant who has jumped up to a position where it does not overlap with the ribs is pressed toward the center of the vehicle by the first region that inflates and deploys behind the second region. However, since the upper arm of the occupant is in the position where it has already been flipped up, the occupant's ribs are not bent. Therefore, according to the present invention, the passenger protection performance can be improved by the above behavior.

  Said boundary part is good to be provided in the area | region where the passenger | crew's upper arm which seats normally sits, seeing from the vehicle side. The boundary portion may be provided in a region between an intermediate portion having a width in the vertical direction along the longitudinal direction of the upper arm and the upper edge portion of the upper arm. Further, the boundary portion may be provided along the intermediate portion.

  In this way, when the boundary portion is provided in each of the above regions, the boundary portion overlaps with the upper arm of the occupant during inflation and deployment. Therefore, by deploying the first region with a delay to the second region, the upper arm is first jumped up in the second region, and the upper arm in the next raised position is then moved toward the center of the vehicle in the first region. The behavior of pressing can be realized. Thereby, bending of a crew member's rib can be suppressed and crew protection performance can be improved.

  Said boundary part is good in it being the 1st folding line formed by folding a side airbag. In this way, the behavior of the side airbag and the upper arm of the occupant can be easily controlled with a simple configuration in which the side airbag is folded.

  Said 1st area | region is good to be folded by the opposite side to the passenger | crew who seated on the sheet | seat. Thereby, since the 1st field is developed from the opposite side to a crew member, it can be developed stably, without raising a crew member's upper arm.

  Said 1st area | region is good to be folded by the side of the passenger | crew who seated on the sheet | seat. As described above, even when the first region is folded toward the passenger, the first region can be deployed behind the second region.

  The side airbag described above is formed by folding a corner formed by the first folding line and the rear edge of the side airbag to the side opposite to the side where the first region is folded. It is good to include a line. Thus, since a side airbag turns up a corner part after folding up the 1st field to the 2nd field, a storing state can be made smaller. Further, since the corner portion is folded back to the side opposite to the side where the first region is folded, the first region can be smoothly expanded during the expansion and deployment.

  Said side airbag is good to be wound or folded upwards from the lower end. Thus, since the side airbag is wound (rolled) or folded upward from the lower end, the storage state can be further reduced, and the wound or folded portion can be smoothly deployed during inflation and deployment. It should be noted that this part can be deployed more smoothly when the side airbag is wound than when the side airbag is folded.

  The boundary portion is a temporary sewing portion for temporarily sewing the vehicle inner base fabric and the vehicle outer base fabric forming the side airbag, and the temporary sewing portion is broken by the gas pressure at the time of expansion and deployment of the second region. Good. Thus, since the temporary sewing part is broken by the gas pressure at the time of expansion and deployment of the second region, the gas is supplied to the first region with a delay from the second region. Therefore, the behavior of the side airbag and the upper arm of the occupant at the time of inflating and deploying can be easily controlled with a simple configuration in which the inner fabric and the outer fabric of the side airbag are temporarily sewn.

  In order to solve the above-described problems, a typical configuration of a method for manufacturing a side airbag according to the present invention is a side airbag that is inflated and deployed between a seat in a vehicle and a side door in response to supply of gas from an inflator. The side airbag manufacturing method for storing the vehicle is such that when viewed from the side of the vehicle, the vehicle descends from the rear side of the occupant toward the front direction along the longitudinal direction of the upper arm of the occupant seated normally on the seat. A first step of folding the first region above the first folding line with respect to the lower second region along the provided first folding line; a first folding line; and a rear edge of the side airbag; A second step of folding back the upper corner of the second fold line along the second fold line connecting the first region to the side opposite to the side where the first region is folded, and the side airbag upward from the lower end. Characterized in that it comprises a third step of digits by winding or folding.

  According to the above configuration, when the side airbag is stored, the first region is folded with respect to the second region along the first folding line, and then the corner portion is folded along the second folding line. It is wound or folded upward from the lower end. In this way, the storage state of the side airbag can be reduced.

  Further, the side airbag in the stored state is unfolded when the portion wound or folded upward from the lower end is expanded, and the corner folded back along the second fold line is further expanded. Two areas develop. Note that an inflator is accommodated in the second region. Next, in the side airbag, the first region folded with respect to the second region along the first folding line is smoothly deployed. In other words, by folding the side airbag as in the above configuration and storing it, the gas is supplied to the first region later than the second region during inflation and deployment, and the first region is delayed from the second region. Inflates and expands.

  Further, as described above, a part of the upper arm of the occupant is in a position overlapping a specific rib on the occupant's chest. Therefore, in the present invention, the first folding line that overlaps the upper arm of the occupant when inflated and deployed is set in the side airbag. For this reason, prior to the first region inflating and deploying above the first folding line, the second region inflates and deploys below the first folding line to jump up the occupant's upper arm, The upper arm and ribs can be prevented from overlapping when viewed from the side.

  Therefore, the occupant's chest is pressed toward the center of the vehicle by the second region inflated and deployed first. However, at this time, the upper arm is no longer interposed between the second region and the specific rib. For this reason, the entire chest is directly pressed by the second region, but the specific ribs of the occupant are not strongly pressed locally. On the other hand, the upper arm of the occupant who has jumped up to a position where it does not overlap with the ribs is pressed toward the center of the vehicle by the first region that inflates and deploys behind the second region. However, since the upper arm of the occupant is in the position where it has already been flipped up, the occupant's ribs are not bent. Therefore, according to the present invention, the storage state can be reduced by folding the side airbag as described above, and further, the occupant protection performance can be improved by suppressing the flexion of the occupant's ribs when inflated and deployed.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the side airbag apparatus and the side airbag manufacturing method which can suppress a passenger | crew's rib bending | flexion at the time of the inflation deployment of a side airbag, and can improve a passenger | crew protection performance.

It is a figure which illustrates schematically the side airbag device in the embodiment of the present invention. It is a figure which illustrates the side airbag manufacturing method in embodiment of this invention. It is a figure which illustrates the mode in the middle of inflating and deploying the side airbag of FIG. FIG. 4 is a diagram illustrating a state in which the side airbag is inflated and deployed subsequent to FIG. 3. It is a schematic diagram which illustrates a mode that the side airbag of a comparative example expand | deploys. It is a figure which illustrates the modification of the side airbag of FIG. It is a schematic diagram which illustrates a mode that the side airbag of FIG. 6 expand | deploys. It is a figure which illustrates the boundary part of the side airbag of the side airbag device in the embodiment of the present invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a diagram schematically illustrating a side airbag device according to an embodiment of the present invention. Fig.1 (a) is a perspective view which shows a part in a vehicle. FIG.1 (b) is a figure which shows the state which looked at the inside of the vehicle of Fig.1 (a) from the vehicle front side. In the drawings, arrows X, Y, and Z respectively indicate the vehicle front side, the vehicle upper side, and the vehicle inner side.

  The side airbag device 100 is built in, for example, a seat back 104 of a vehicle seat 102 on the left side of the vehicle that serves as a passenger seat in the vehicle. The side airbag device 100 includes a side airbag 108 (see FIG. 2) that is provided outside the seat back 104 and that stands and inflates between the vehicle seat 102 and the side door 106.

  Further, the side airbag device 100 includes an inflator 110 (see FIG. 3A) that supplies a gas for inflation and deployment to the side airbag 108. The inflator 110 is a gas generator, and is configured to generate and supply gas by burning an internal gas generating agent. The inflator 110 is a cylinder type (cylinder type), and is fixed to the seat back 104 by a stud bolt (not shown) protruding from the main body.

  FIG. 2 is a diagram illustrating a side airbag manufacturing method for housing the side airbag 108 in the embodiment of the present invention. The side airbag 108 is formed into a bag shape by a method of sewing from a total of two base fabrics constituting the front and back surfaces, a method of spinning using OPW (One-Piece Woven), or the like.

  When the side airbag 108 is stored, first, the side airbag 108 in the unfolded state before folding shown in FIG. 2A is folded along the first folding line 112 shown in FIG. 2B (first step). ). As a result, the side airbag 108 has the first fold line 112 as a boundary portion, the first region 114 positioned above the first fold line 112, and the second region positioned below the first fold line 112. It is divided into areas 116.

  That is, in the first step, the side airbag 108 is folded along the first folding line 112 in the first region 114 above the first folding line 112 with respect to the second region 116 below. As shown in FIG. 3A, the first folding line 112 is seen from the rear side of the occupant 118 along the longitudinal direction of the upper arm 120 of the occupant 118 seated normally on the vehicle seat 102 as viewed from the side of the vehicle. It is provided so as to descend toward the direction, and is further set to a position that overlaps with the center line 122 along the longitudinal direction of the upper arm 120 during inflation and deployment. The physique of the occupant 118 conforms to various dummies, but more preferably conforms to the body of World SID [World Side Impact Dummy] 50th Percentile Male Side Impact Dummy W50-00000.

  Subsequently, along the second fold line 124 in FIG. 2B, the corner 126 above the second fold line 124 and the side where the first region 114 is folded as shown in FIG. Is folded back to the opposite side (second step). As shown in FIG. 2C, the second folding line 124 is set at a position connecting the first folding line 112 and the rear edge 128 of the side airbag 108. Note that the first region 114 can be smoothly expanded during inflation and deployment by folding the corner 126 to the side opposite to the side where the first region 114 is folded.

  Subsequent to the second step, the side airbag 108 is wound or folded upward from the lower end 130 as shown in FIG. 2 (d) (third step). In the third step, the lower end 130 of the side airbag 108 is wound or folded on the same side as the corner portion 126. However, the present invention is not limited to this, and the first region 114 may be wound or folded on the folded side. Note that the portion 132 where the lower end 130 of the side airbag 108 is wound or folded can be deployed more smoothly when inflated and deployed than when folded.

  Subsequent to the third step, the side airbag 108 is folded so as to be reduced in the front-rear direction as shown in FIG. 2E, so that the side airbag 108 in the stored state (see FIG. 2F) is obtained. Can be formed. The stored side airbag 108 is built in the seat back 104 of the vehicle seat 102 together with the inflator 110 (see FIG. 3A) stored in the second region 116.

  As described above, when the side airbag 108 is stored, the first region 114 is folded with respect to the second region 116 along the first folding line 112, and then the corner portion 126 is folded along the second folding line 124. Further, it is wound or folded upward from the lower end 130. By folding in this way, the side airbag 108 in the stored state can be made smaller.

  FIG. 3 is a diagram illustrating a state where the side airbag 108 of FIG. 1 is in the middle of inflating and deploying. FIG. 3A is a diagram illustrating a state in which the side airbag device 100 is viewed from the side of the vehicle. FIG. 3B is a schematic diagram showing the state of FIG. 3A viewed from the front side of the vehicle. However, FIG. 3B shows a dummy simulating the occupant 118, and a specific rib 136 (for example, the second rib from the top) of the chest 134 is hatched. Further, FIG. 3B illustrates an impactor 138 that gives an impact from the side of the vehicle, instead of the side door 106 (see FIG. 1).

  Here, when the occupant 118 is viewed from the side of the vehicle, a part of the center line 122 of the upper arm 120 of the occupant 118 shown in FIG. 3A overlaps with the rib 136 of the chest 134 shown in FIG. 3B. is there. Therefore, when the upper arm 120 of the occupant 118 is pushed toward the center of the vehicle by the inflated and deployed side airbag 108 and the rib 136 is strongly pressed locally, the rib 136 is bent and the injury value to the occupant 118 increases. there is a possibility.

  Therefore, in the present embodiment, the first folding line 112 is set in the side airbag 108 as a boundary portion that overlaps the center line 122 of the upper arm 120 of the occupant 118 at the time of inflation and deployment. In such a side airbag device 100, when an impact is received from the impactor 138, gas is supplied from the inflator 110 to the second region 116 of the side airbag 108 (see FIG. 2F) in the stored state.

  Next, in the side airbag 108, the part 132 (refer FIG.2 (d) and FIG.2 (e)) wound or folded upwards from the lower end 130 expand | deploys. Then, in the side airbag 108, the corner | angular part 126 (refer FIG.2 (b) and FIG.2 (c)) folded along the 2nd folding line 124 expand | deploys.

  In the side airbag 108, as shown in FIG. 3B, the second region 116 is inflated and deployed below the first folding line 112. On the other hand, as shown to Fig.3 (a), the 1st area | region 114 is folded by the opposite side to the passenger | crew 118 seated on the vehicle seat 102, and is in the state which has not yet supplied gas.

  By inflating and deploying the second region 116 prior to the first region 114, the upper arm 120 of the occupant 118 jumps to the position of the upper arm 120A indicated by the chain line in the drawing as indicated by an arrow A in FIG. increase. The upper arm 120A that is flipped up is in a position that does not substantially overlap the rib 136 when viewed from the side of the vehicle (see FIG. 4B).

  FIG. 4 is a diagram illustrating a state in which the side airbag 108 is inflated and deployed subsequent to FIG. 3. FIG. 4A is a diagram illustrating a state in which the side airbag device 100 is viewed from the side of the vehicle. FIG. 4B is a schematic diagram showing a state of FIG. 4A viewed from the front side of the vehicle.

  In the side airbag 108, after the second region 116 is inflated and deployed, the gas is supplied to the first region 114 later than the second region 116. As a result, the first region 114 expands and expands above the first folding line 112 as shown in FIG. In FIG. 4B, the first region 114 is hatched.

  Since the first region 114 is folded on the side opposite to the occupant 118, the first region 114 is deployed from the side opposite to the occupant 118, and is stably deployed without further raising the upper arm 120A of the occupant 118. Therefore, the upper arm 120 </ b> A of the occupant 118 is pressed toward the vehicle center side by the first region 114 that expands and develops behind the second region 116. However, as shown in FIG. 4B, the upper arm 120A of the occupant 118 has not been bent by the second region 116 to a position where it has already almost overlapped with the rib 136.

  In the side airbag 108, the first region 114 may be folded toward the occupant 118. Even in such a case, the first region 114 can be deployed behind the second region 116.

  Further, the chest 134 of the occupant 118 is pressed toward the center of the vehicle by the second region 116 that has been inflated and deployed as shown in FIG. 4B. However, at this time, the upper arm 120A is not already interposed between the second region 116 and the rib 136. For this reason, in the side airbag 108, the entire chest 134 is directly pressed by the second region 116, but the specific rib 136 of the occupant 118 is not strongly pressed locally. Therefore, the rib 136 of the passenger | crew 118 does not bend.

  FIG. 5 is a schematic view illustrating how the side airbag 200 of the comparative example is inflated and deployed. The side airbag 200 of the comparative example does not set the first fold line 112 as a boundary portion, but is simply placed in the retracted state by being wound or folded along the vehicle front-rear direction or the vehicle vertical direction. Different from the airbag 108.

  The side airbag 200 is not divided into the first region 114 and the second region 116 because the first folding line 112 is not set. For this reason, as shown by the arrow B in FIG. 5A, the side airbag 200 is pressed toward the vehicle center side without jumping up the upper arm 120 of the occupant 118 at the time of inflation and deployment. At this time, the upper arm 120 is interposed between the side airbag 200 and the specific rib 136 when viewed from the side of the vehicle.

  Therefore, when the side airbag 200 is further inflated and deployed, the upper arm 120 of the occupant 118 comes into contact with the rib 136 as shown in FIG. 5 (b), and the rib 136 is locally moved as shown in FIG. 5 (c). It will be strongly pressed and bent. Therefore, the side airbag 200 may increase the injury value to the occupant 118.

  In contrast, in the present embodiment, the behavior of the side airbag 108 and the upper arm 120 of the occupant 118 at the time of inflating and deploying can be easily controlled with a simple configuration in which the side airbag 108 is folded along the first folding line 112. . Therefore, according to the side airbag device 100, when the side airbag 108 is inflated and deployed, the specific rib 136 of the occupant 118 is not bent, and the injury value to the occupant 118 can be reduced.

  FIG. 6 is a diagram illustrating a modification of the side airbag 108 of FIG. The side airbag 108A of the modified example has a temporary sewing portion 140 set instead of the first folding line 112 (see FIG. 2B) as a boundary portion that divides the first region 114 and the second region 116. Thus, the side airbag 108 is different.

  The temporary sewing portion 140 is set so that the vehicle interior base fabric 142 and the vehicle exterior base fabric 144 forming the side airbag 108A are temporarily sewn, and are ruptured by the gas pressure when the second region 116 is inflated and deployed. ing. For this reason, after the temporary sewing part 140 is broken, the first region 114 is supplied with gas behind the second region 116 and expands and develops behind the second region 116. That is, in the side airbag 108 </ b> A, before the first region 114 is inflated and deployed on the upper side of the temporary sewing portion 140, the second region 116 is inflated and deployed on the lower side of the temporary sewing portion 140.

  FIG. 7 is a schematic view illustrating a state in which the side airbag 108A of FIG. 6 is inflated and deployed. FIG. 7A is a diagram illustrating a state in the middle of inflating and deploying the side airbag 108A. FIG. 7B is a diagram illustrating a state in which the side airbag 108A is inflated and deployed following FIG. 7A.

  When the side airbag 108A receives an impact from the impactor 138 as shown in FIG. 7A, the gas from the inflator 110 (see FIG. 3A) is supplied to the second region 116. For this reason, the second region 116 expands and deploys below the temporary sewing portion 140. On the other hand, since the temporary sewing part 140 is not broken, the first region 114 is in a state where the gas is not yet supplied and is not expanded.

  The second region 116 is inflated and deployed before the first region 114, so that the upper arm 120 of the occupant 118 jumps up as shown by the arrow A in FIG. 7 (b)) and the ribs 136 are not substantially overlapped.

  Subsequently, in the side airbag 108 </ b> A, the temporary sewing portion 140 is broken by the gas pressure when the second region 116 is inflated and deployed. In the side airbag 108 </ b> A, the gas is supplied to the first region 114 later than the second region 116. As a result, the first region 114 is inflated and deployed above the temporary sewing portion 140 after being broken, as shown by hatching in FIG.

  The first region 114 is inflated and deployed to press the upper arm 120A of the occupant 118 toward the vehicle center side. However, the upper arm 120 </ b> A of the occupant 118 has already been flipped up to a position that does not substantially overlap the rib 136 by the second region 116, so that the rib 136 of the occupant 118 is not bent.

  Further, the chest 134 of the occupant 118 is pressed toward the center of the vehicle by the second region 116 that has been inflated and deployed as shown in FIG. 7B. However, at this time, the upper arm 120A is not already interposed between the second region 116 and the rib 136. For this reason, in the side airbag 108A, the entire chest 134 is directly pressed by the second region 116, but the specific rib 136 of the occupant 118 is not strongly pressed locally. Therefore, the rib 136 of the passenger | crew 118 does not bend.

  As described above, in the modified example, the behavior of the side airbag 108A and the upper arm 120 of the occupant 118 at the time of inflating and deploying is simple, in which the inner base fabric 142 and the outer base fabric 144 are temporarily sewn by the temporary sewing unit 140. Can be controlled easily. Therefore, according to the side airbag 108A, it is possible to reduce the injury value to the occupant 118 without bending the specific rib 136 of the occupant 118 at the time of inflation and deployment.

  Moreover, in the said embodiment, in the side airbag 108, the 1st folding line 112 shown to Fig.3 (a) was made into the boundary part, and this was set to the position which overlaps with the centerline 122 of the upper arm 120 of the passenger | crew 118 at the time of inflation deployment. However, it is not limited to this. Hereinafter, a description will be given with reference to FIG.

  FIG. 8 is a diagram illustrating a boundary portion of the side airbag 108 of the side airbag device 100 according to the embodiment of the present invention. In the drawing, each region where the boundary portion can be set is hatched, and the positional relationship between each region and the upper arm 120 of the occupant 118 is illustrated.

  As an example, the first fold line 112 that is a boundary portion may be provided in each of the regions 146A, 146B, and 146C shown in FIGS. 8A, 8B, and 8C. The region 146A is a region where the upper arm 120 of the occupant 118 who sits normally is seen from the side of the vehicle as shown in FIG.

  As shown in FIG. 8B, the region 146 </ b> B is a region between the center line 122 of the upper arm 120 of the occupant 118 who sits normally and the upper edge 148 of the upper arm 120 as viewed from the side of the vehicle. As shown in FIG. 8C, the region 146 </ b> C is a region (intermediate portion) having a width in the vertical direction along the center line 122 of the upper arm 120 of the occupant 118 seated normally when viewed from the side of the vehicle. However, the present invention is not limited to this, and a boundary portion may be provided in a region between the region 146C that is an intermediate portion and the upper edge portion 148 of the upper arm 120 of the occupant 118.

  Even when the first fold line 112 that is a boundary portion is set in each of the regions 146A, 146B, and 146C, the first fold line 112 overlaps with the upper arm 120 of the occupant 118 at the time of inflating and deploying. For this reason, by deploying the first region 114 behind the second region 116, the upper arm 120 is first jumped up in the second region 116, and then the upper arm 120 in the raised position is moved up in the first region 114. The behavior of pushing toward the center of the vehicle can be realized. As a result, bending of the ribs of the occupant 118 can be suppressed and occupant protection performance can be improved.

  Similarly, when the temporary sewing portion 140 that is a boundary portion of the side airbag 108A shown in FIG. 6 is set in each of the regions 146A, 146B, and 146C, the first region 114 is delayed from the second region 116 at the time of inflation and deployment. Since the above behavior can be realized, the bending of the ribs of the occupant 118 can be suppressed and the occupant protection performance can be improved.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  Moreover, in the said embodiment, although the example which applied the side airbag apparatus concerning this invention to the motor vehicle was demonstrated, it is also possible to apply to an aircraft, a ship, etc. besides a motor vehicle, and obtains the same effect. Can do.

  The present invention relates to a side airbag device provided with a side airbag that inflates and deploys between a seat and a side door in a side collision or rollover (rollover) of a vehicle, and a side airbag manufacturing method for storing a side airbag. Can be used in the way.

DESCRIPTION OF SYMBOLS 100 ... Side airbag apparatus, 102 ... Vehicle seat, 104 ... Seat back, 106 ... Side door, 108, 108A ... Side airbag, 110 ... Inflator, 112 ... First folding line, 114 ... First area, 116 ... 2nd area, 118 ... occupant, 120, 120A ... upper arm, 122 ... upper arm center line, 124 ... second folding line, 126 ... corner, 128 ... rear edge, 130 ... lower end, 132 ... site, 134 ... chest, DESCRIPTION OF SYMBOLS 136 ... Rib, 138 ... Impactor, 140 ... Temporary sewing part, 142 ... Car interior base fabric, 144 ... Car outer base fabric, 146A, 146B, 146C ... Area, 148 ... Upper edge of upper arm

Claims (11)

A side airbag device having a side airbag that inflates and deploys between a seat in a vehicle and a side door in response to supply of gas from an inflator,
The side airbag is provided so as to descend from the rear side of the occupant toward the front direction along the longitudinal direction of the upper arm of the occupant normally seated on the seat when viewed from the side of the vehicle, and is inflated on the upper arm. Including overlapping borders when unfolding,
The boundary portion causes the side airbag to have a first region located above the boundary portion when inflated and deployed, and a second region located below the boundary portion during inflation and deployment to accommodate the inflator. Divided into areas,
The side airbag device according to claim 1, wherein the first region is supplied with gas later than the second region, and is inflated and deployed later than the second region.   2. The side airbag device according to claim 1, wherein the boundary portion is provided in a region where the upper arm of the occupant who normally sits is present when viewed from the side of the vehicle.   3. The side according to claim 2, wherein the boundary portion is provided in a region between an intermediate portion having a width in a vertical direction along a longitudinal direction of the upper arm and an upper edge portion of the upper arm. Airbag device.   The side airbag device according to claim 3, wherein the boundary portion is provided along the intermediate portion.   5. The side airbag device according to claim 1, wherein the boundary portion is a first folding line formed by folding the side airbag.   The side airbag device according to claim 5, wherein the first region is folded to a side opposite to an occupant seated on the seat.   The side airbag device according to claim 5, wherein the first region is folded to a side of an occupant seated on the seat.   The side airbag is formed by folding a corner formed by the first folding line and a rear edge of the side airbag to the side opposite to the side where the first region is folded. The side airbag device according to any one of claims 5 to 7, comprising two folding lines.   The side airbag device according to any one of claims 1 to 8, wherein the side airbag is wound or folded upward from a lower end. The boundary portion is a temporary sewing portion that performs temporary sewing of an inner base fabric and an outer base fabric forming the side airbag,
The side airbag device according to any one of claims 1 to 4, wherein the temporary sewing portion is broken by a gas pressure when the second region is inflated and deployed. A side airbag manufacturing method for storing a side airbag that inflates and deploys between a seat in a vehicle and a side door in response to supply of gas from an inflator,
As viewed from the side of the vehicle, along the first folding line provided so as to descend from the rear side of the occupant toward the front direction along the longitudinal direction of the upper arm of the occupant normally seated on the seat, A first step of folding the first region above the one folding line with respect to the lower second region;
Along the second fold line connecting the first fold line and the rear edge of the side airbag, the corner above the second fold line is on the side opposite to the side where the first region is folded. A second step of turning back;
And a third step of winding or folding the side airbag upward from the lower end.

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