JP2019001213A - Side air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress swinging of an airbag main body in the front-back direction due to deployment and inflation. An outer shell portion of an airbag 40 includes an airbag main body 41 having an inflating portion. The inflatable section is provided with an inclined partition section 60 arranged in a state of being inclined so that it becomes higher toward the front side, and an upper inflatable section above the inclined partition section 60 and a lower inflatable section below the inclined partition section 60. And 68. The upper expansion part is located below the horizontal partition part 70 by the horizontal partition part 70 arranged in the same inflatable part so as to extend in the front-rear direction, and at least the gas ejection part 31a of the gas generator 30 is arranged. The expanded support portion 78 is divided into a support expansion portion 78 and a protection expansion portion 79 above the lateral partition portion 70. Vent holes 69 and 81 are formed in the inclined partition 60 and the lateral partition 70, respectively. [Selection diagram] Fig. 5

Description

  In the present invention, when an impact is applied to the vehicle from the side of the vehicle seat, the airbag is deployed and inflated on the side of the occupant seated on the vehicle seat to protect the occupant from the impact. The present invention relates to an airbag device.

  A side airbag device provided with an air bag and a gas generator as a device for protecting an occupant from an impact caused by a side collision or the like from the side of the vehicle seat on which the occupant is seated Is widely known. In this side airbag device, the airbag is folded together with the gas generator and incorporated in a storage portion in the seat back of the vehicle seat. The outer shell portion of the airbag is constituted by an airbag body having an inflating portion.

  In this side airbag device, when a side impact is applied to a side wall portion such as a side door of a vehicle, inflation gas is supplied from the gas generator to the airbag body. The airbag main body is deployed and inflated by the inflation gas, and jumps out of the vehicle seat with a part left in the storage portion. Thereafter, the airbag body is deployed and inflated forwardly between the occupant and the side wall. The airbag body that has been deployed and inflated is interposed between the occupant and the side wall portion that enters the inside of the vehicle, restrains the occupant, and mitigates the impact from the side that is transmitted to the occupant through the side wall portion.

  As one aspect of the side airbag device, there is one described in Patent Document 1, for example. In this side airbag device, the inflated part (bag-like part) is inclined upward so as to be higher toward the front side, and the inclined partition part (partition part) disposed in the inflated part is above the inclined partitioned part. Is divided into an upper expansion portion (first air chamber) and a lower expansion portion (second air chamber) below the inclined partition portion. The upper expansion part includes a support expansion part in which a gas generator (inflator) is disposed, and a protective expansion part located above the support expansion part. A vent hole (gas flow hole) is formed in the inclined section.

In addition, in description regarding the said patent document 1, the name in the parenthesis following a member name is a member name currently used by the said patent document 1. FIG.
According to the side airbag device described in Patent Document 1, the inflation gas from the gas generator is first supplied to the support inflation portion. Since the support expansion part has a shape that gradually expands from the lower end part toward the upper end part, the expansion gas from the gas generator flows through the support expansion part and flows into the protection expansion part. Therefore, it is possible to deploy the protective inflating portion at a stretch on the upper side of the passenger. Further, the expansion gas is supplied to the lower expansion portion through the vent hole of the inclined partition portion.

Japanese Patent Laying-Open No. 2015-85768

  However, in the side airbag device described in Patent Document 1, the occupant's head is also protected, and the upper portion of the airbag body is deployed and inflated on the side of the head. As an airbag main body, a thing longer than the airbag main body in a general side airbag apparatus is used. Moreover, the expansion gas is supplied to the protective expansion portion at once. Therefore, when the airbag main body starts to be deployed and inflated, the airbag main body swings forward by the inflating gas from the gas generator. Next, the airbag body swings backward by the reaction of the swinging forward. Since it swings in the front-rear direction in this way, it is difficult to position the airbag body in a stable posture on the side of the occupant.

  Such a problem may occur not only in the vehicle side airbag device but also in the vehicle side airbag device in which the inside of the inflating portion is partitioned into the upper inflating portion and the lower inflating portion by the inclined partitioning portion.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a side airbag device that can suppress the back-and-forth movement of the airbag body accompanying deployment and inflation. It is in.

  A side airbag device that solves the above problems is incorporated in a storage portion provided on a side of an occupant seated on a vehicle seat and is inflated in response to an impact applied from the side of the vehicle seat. In a state in which the gas generator is ejected from the gas ejection part, and is expanded by the expansion gas supplied from the gas generator, and is left in the storage part. An airbag that is deployed and inflated forward on the side of the occupant, wherein an outer shell portion of the airbag is configured by an airbag body having an inflating portion, and the inflating portion is The inclined partition portion disposed in the inflatable portion in a state of being inclined so as to be higher toward the front side, into an upper inflatable portion above the inclined partition portion and a lower inflatable portion below the inclined partition portion. Comparted, said upper swelling The support expansion part is located below the horizontal partition part by the horizontal partition part arranged in the same expansion part so as to extend in the front-rear direction, and at least the gas ejection part of the gas generator is arranged And a protective expansion part above the horizontal partition part, and further, vent holes are formed in the inclined partition part and the horizontal partition part, respectively.

  According to the above configuration, when an impact is applied to the vehicle from the side of the vehicle seat, the expansion gas is ejected from the gas ejection portion of the gas generator. The expansion gas is first supplied to the support expansion portion where the gas ejection portion is disposed. The expansion gas increases the internal pressure of the support expansion portion, and the support expansion portion starts to expand. The support expansion part is sandwiched between the upper and lower sides by the horizontal partition part and the inclined partition part. Therefore, the capacity of the support inflating part is smaller than the capacity of the upper inflating part (first air chamber) described in Patent Document 1 in which the horizontal partition part is not provided. Moreover, the inclined partition portion is inclined so as to be higher toward the front side. Therefore, the capacity | capacitance of a support expansion | swelling part is less than the case where an inclination division part is not inclined and it extends in the front-back direction. Therefore, the supporting and inflating portion becomes higher in pressure than the side airbag device described in Patent Document 1 and faster than the side airbag device in which the inclined partition portion is not inclined.

  From the middle of the expansion and expansion of the support expansion part, a part of the expansion gas in the support expansion part flows into the protective expansion part through the vent hole of the horizontal partition part. The expansion gas increases the internal pressure of the protective inflating portion, and the protective inflating portion starts to expand behind the supporting inflating portion.

  In addition, another part of the inflation gas in the support inflation portion flows into the lower inflation portion through the vent hole in the inclined partition portion. Due to the expansion gas, the internal pressure of the lower expansion portion rises, and the lower expansion portion starts to expand behind the support expansion portion.

The expansion of each of the support expansion portion, the protection expansion portion, and the lower expansion portion is performed with development on the side of the occupant seated on the vehicle seat.
When the protective inflating part and the lower inflating part are expanded and inflated, the supporting inflating part is at a high pressure as described above. Therefore, the support inflating portion supports the protective inflating portion and the lower inflating portion, and suppresses swinging of the protective inflating portion and the lower inflating portion in the front-rear direction. The support inflating portion, the protective inflating portion, and the lower inflating portion are positioned in a stable posture on the side of the occupant when deployment and inflation are completed. And a passenger | crew is restrained by these support expansion parts, a protection expansion part, and a lower expansion part, and it protects from the said impact.

The said side airbag apparatus WHEREIN: It is preferable that the rear lower end of the said inclination division part is arrange | positioned above the lower end of the said lower expansion part.
According to said structure, the capacity | capacitance of a support expansion part becomes small compared with the case where the rear lower end of an inclination division part is arrange | positioned at the lower end of a lower expansion part. Accordingly, the expansion gas is quickly filled in the support expansion portion, and the support expansion portion becomes high pressure earlier. Therefore, the effect that the support inflating portion suppresses the swinging of the protective inflating portion and the lower inflating portion can be obtained early.

The said side airbag apparatus WHEREIN: It is preferable that the front upper end of the said inclination division part is arrange | positioned directly under the front end of the said horizontal division part.
According to said structure, the capacity | capacitance of a support expansion | swelling part becomes small compared with the case where the front upper end of an inclination division part is arrange | positioned in the location farther below rather than just under the front end of a horizontal division part. Accordingly, the expansion gas is quickly filled in the support expansion portion, and the support expansion portion becomes high pressure earlier. Therefore, the effect that the support inflating portion suppresses the swinging of the protective inflating portion and the lower inflating portion can be obtained early.

  In the side airbag device, in the initial stage of supplying the inflation gas from the gas generator, it is preferable that the internal pressure of the support inflating portion is higher than the internal pressure of the protective inflating portion and the internal pressure of the lower inflating portion. .

  According to the above configuration, at the initial stage of supplying the expansion gas from the gas generator, the internal pressure of the support expansion portion becomes higher than the internal pressure of the protective expansion portion and the internal pressure of the lower expansion portion. In this way, a difference occurs in the internal pressure characteristics between the support expansion portion, the protective expansion portion, and the lower expansion portion. Therefore, at the initial stage of supply of the inflation gas, the support inflating portion is deployed and inflated at the side of the high impact resistance portion of the upper body of the occupant, and the protective inflating portion and the side of the low impact resistance portion. If the lower inflating portion is expanded and inflated, the inflating portion can be expanded and inflated at the side of the upper body with an internal pressure that matches the impact resistance, and the upper body can be effectively protected from the impact.

  In the side airbag device, it is preferable that the total opening area of the vent holes in the inclined partition portion is set smaller than the total opening area of the vent holes in the horizontal partition portion.

  If the sum total of the opening area of the vent hole is set as in the above configuration, the amount of inflation gas flowing from the support inflating part through the vent hole in the horizontal partition part into the protective inflating part is from the supporting inflating part. The amount of the expansion gas flowing into the lower expansion portion through the vent hole of the inclined partition portion is larger. Therefore, the internal pressure of the protective expansion part starts to rise from a time earlier than the internal pressure of the lower expansion part. It becomes possible to start the expansion and expansion of the protective expansion portion earlier than the lower expansion portion.

  According to the above-described side airbag device, it is possible to suppress the swinging of the airbag body in the front-rear direction accompanying deployment and inflation.

The side view which shows schematic structure of the side airbag apparatus in one Embodiment. The top view which shows the positional relationship of a vehicle seat, an airbag, a passenger | crew, and a side wall part in one Embodiment. 1 is a cross-sectional view of a positional relationship among a vehicle seat, an airbag, an occupant, and a side wall portion as viewed from the front of the vehicle in an embodiment. In one embodiment, the partial plane sectional view showing the internal structure of the side part of the vehicle outside in the seat back in which the air bag module is incorporated. The side view which shows the airbag module with which the airbag main body was made into the non-expanded state with the passenger | crew and the vehicle seat in one Embodiment. FIG. 6 is a side sectional view showing an internal structure of the airbag module of FIG. 5 together with an occupant and a vehicle seat. In one embodiment, the exploded perspective view shown in the state where each constituent member of an airbag was developed, respectively. (A) is sectional drawing along the 8a-8a line of FIG. 5, (b) is a fragmentary sectional view which shows the state by which the horizontal division part of FIG. 8 (a) was strained. (A) is sectional drawing along the 9a-9a line of FIG. 5, (b) is a fragmentary sectional view which shows the state by which the inclination division part of FIG. 9 (a) was strained. (A), (b) is explanatory drawing which shows the state in the middle of manufacturing the airbag module precursor in one Embodiment. (A), (b) is explanatory drawing which shows the state in the middle of manufacturing an airbag module precursor similarly. (A), (b) is explanatory drawing which shows the state in the middle of manufacturing an airbag module precursor similarly. (A), (b) is explanatory drawing which shows the state in the middle of manufacturing an airbag module precursor similarly. The characteristic view which shows the time change of the internal pressure of each expansion part in one Embodiment. The characteristic view which shows the time change of the internal pressure of each expansion part in a modification.

Hereinafter, an embodiment of a side airbag device for a front seat of a vehicle will be described with reference to FIGS.
In the following description, the forward direction of the vehicle will be described as the front, and the reverse direction of the vehicle will be described as the rear. Further, with the center portion in the vehicle width direction (vehicle width direction) as a reference, the side approaching the center portion is referred to as “vehicle inside” and the side away from the center portion is referred to as “vehicle outside”. It is also assumed that an occupant having the same physique as the crash test dummy is seated on the vehicle seat in a predetermined regular posture.

  As shown in FIGS. 1 to 3, in a vehicle 10 as a vehicle, a vehicle seat 12 as a vehicle seat constituting the front seat is disposed in the vicinity of the vehicle interior of the side wall portion 11. Here, the side wall portion 11 refers to a vehicle constituent member disposed on a side portion of the vehicle 10, and mainly corresponds to a door, a pillar, and the like. The side wall 11 corresponding to the front seat is a front door, a center pillar (B pillar), or the like.

  The vehicle seat 12 includes a seat cushion 13 and a seat back 14. The seat cushion 13 is attached to the floor of the vehicle body so that the front-rear position can be adjusted. The seat back 14 stands up from the rear portion of the seat cushion 13 so as to be positioned rearward as it is upward, and is configured to be able to adjust the tilt angle. The vehicle seat 12 is disposed in the passenger compartment with the seat back 14 facing forward. The width direction of the vehicle seat 12 arranged in this way matches the vehicle width direction.

Next, the internal structure of the side portion on the vehicle outer side in the seat back 14 will be described.
Inside the seat back 14, a seat frame forming the skeleton is arranged. As shown in FIG. 4, a part of the seat frame is disposed in a side portion outside the vehicle in the seat back 14, and this portion (hereinafter referred to as “side frame portion 15”) is formed by bending a metal plate or the like. It is formed by doing. A seat pad 16 made of an elastic material such as urethane foam is disposed on the front side of the seat frame including the side frame portion 15. A backboard 17 made of synthetic resin or the like is disposed on the rear side of the seat frame. Although the seat pad 16 is covered with a skin, the skin is not shown in FIG.

  In the seat pad 16, a storage portion 18 is provided at a location adjacent to the vehicle exterior of the side frame portion 15. An air bag module ABM that forms the main part of the side air bag device is incorporated in the storage portion 18.

  A slit 19 extends diagonally forward and toward the outside of the vehicle from the front and outside corners of the storage portion 18. A portion sandwiched by the front corner 16c and the slit 19 on the side of the seat pad 16 outside the vehicle (a portion surrounded by a two-dot chain line in FIG. 4) is broken by an air bag 40 described later. The schedule part 22 is comprised.

The airbag module ABM includes a gas generator 30 and an airbag 40 as main components. Next, each of these structural members will be described.
Here, in the present embodiment, when the airbag module ABM and its constituent members are referred to as “vertical direction” and “front-rear direction”, the seat back 14 of the vehicle seat 12 is used as a reference. The direction in which the seat back 14 stands up is the “vertical direction” of the airbag module ABM, and the thickness direction of the seat back 14 is the “front-back direction” of the airbag module ABM. As described above, since the seat back 14 is slightly inclined rearward, the “vertical direction” of the airbag module ABM or the like does not exactly match the vertical direction (vertical direction) of the vehicle 10, and is somewhat Inclined. Similarly, the “front-rear direction” of the airbag module ABM or the like does not match the front-rear direction (horizontal direction) of the vehicle 10 and is slightly inclined.

<Gas generator 30>
As shown in FIGS. 3 and 5, the gas generator 30 includes an inflator 31 and a retainer 32 that covers the inflator 31, and has a long shape as a whole. Here, a type called a pyrotype is adopted as the inflator 31. The inflator 31 has a substantially cylindrical shape, and a gas generating agent (not shown) that generates an expansion gas is accommodated therein. The inflator 31 has a gas ejection part 31a at its lower end. Further, a harness serving as an input wiring for an operation signal to the inflator 31 is connected to an upper end portion of the inflator 31 via a connector (none of which is shown).

  As the inflator 31, instead of the pyro type using the gas generating agent, a type (hybrid type) in which a partition wall of a high pressure gas cylinder filled with a high pressure gas is broken with an explosive or the like to eject an expansion gas is used. May be.

  On the other hand, the retainer 32 is a member having a function of attaching the inflator 31 to the side frame portion 15 together with the airbag 40 while functioning as a diffuser for controlling the direction in which the inflation gas is ejected. Most of the retainer 32 is formed in a substantially cylindrical shape by bending a plate material such as a metal plate. Bolts 33 are fixed as a member for attaching the retainer 32 to the side frame portion 15 at a plurality of locations spaced apart from each other in the vertical direction of the retainer 32.

  The gas generator 30 may be one in which an inflator 31 and a retainer 32 are integrated. Further, the gas generator 30 may be configured only by the inflator 31 having the bolt 33 without using the retainer 32.

<Airbag body 41>
As shown in FIGS. 1 to 4, an outer shell portion of the airbag 40 is constituted by an airbag body 41.

  FIG. 5 shows the airbag module ABM with the occupant P1 and the vehicle seat 12 in a state where the airbag main body 41 is only deployed and is not inflated (hereinafter referred to as “deployed non-inflated state”). 6 shows the airbag module ABM in which the airbag body 41 of FIG. 5 is cut at the center in the vehicle width direction together with the occupant P1 and the vehicle seat 12 in order to show the internal structure of the airbag module ABM. Yes. Furthermore, FIG. 7 shows a state in which the constituent members of the airbag 40 including the airbag body 41 are deployed.

  As shown in FIGS. 5 to 8, the airbag main body 41 folds one piece of cloth (also referred to as a base cloth, panel cloth, etc.) to the front along a fold line 42 set at the center portion thereof. Thus, they are formed by overlapping in the vehicle width direction and joining the overlapped portions into a bag shape. Here, in the airbag main body 41, in order to distinguish the two overlapped portions, the one located on the inner side of the vehicle is referred to as a main body cloth portion 43, and the one located on the outer side of the vehicle is referred to as a main body cloth portion 44. And

  In the present embodiment, the cloth piece is folded in two so that the fold line 42 is located at the rear end of the airbag body 41. However, the fold line 42 has other ends such as a front end, an upper end, The cloth piece may be folded in half so as to be located at the lower end or the like. The airbag body 41 may be composed of two pieces of cloth divided along the fold line 42. In this case, the airbag main body 41 is formed by superimposing two pieces of cloth in the vehicle width direction and joining both pieces so as to form a bag. Furthermore, at least one of the main body cloth portions 43 and 44 may be composed of two or more pieces of cloth.

  In the airbag main body 41, the outer shapes of the two main body cloth portions 43 and 44 are in a line-symmetric relationship with respect to the folding line 42 as an axis of symmetry. The shape and size of each of the main body cloth portions 43 and 44 is such that when the airbag main body 41 has been deployed and inflated, it is lateral to many areas of the upper body of the occupant P1 (area from the head PH to the waist PP). It is formed in the shape and size which are located in.

A constricted portion 45 having a smaller size in the front-rear direction than other portions is formed at a location spaced downward from the top of each of the main body fabric portions 43 and 44.
As both the main body cloth portions 43 and 44, a woven fabric formed using a material having high strength and flexibility and can be easily folded, for example, polyester yarn, polyamide yarn or the like is suitable. Yes.

  The above-described coupling of the two main body cloth portions 43 and 44 is performed at a peripheral coupling portion 46 provided at the peripheral portion thereof. In the present embodiment, most of the peripheral edge coupling portion 46 sews (sews) a portion of the peripheral edge portions of the main body cloth portions 43 and 44 excluding the rear end portion (the vicinity of the folding line 42) with a sewing thread. It is formed by. Thus, the point by which the connection is made by sewing is the same for the various connection parts described later. The various coupling parts are protective coupling parts 48, 49, annular coupling parts 52, 56, endless coupling part 54, and coupling parts 65-67, 75-77.

  Regarding the above sewing, in FIGS. 5, 6, and 10 to 13, the sewing portion is represented by three line types. The first line type is a line (a kind of broken line) expressed by arranging a certain length of thick lines intermittently (a type of broken line), which shows a state where the stitched portion is viewed from the side (the peripheral edge in FIG. 5). (Refer to the coupling portion 46). The second line type is a line (a type of a broken line) in which fine lines of a certain length (longer than a general broken line) are intermittently arranged, which is the main body cloth portion 44 on the outside of the vehicle, etc. The sewing thread is located in the back of the sewing thread and is not directly visible (hidden) (see the coupling portion 67 in FIG. 5). The third line type is a line (a kind of broken line) in which points are arranged at regular intervals. This is a line between the main body cloth part 43 and the main body cloth part 44 to be stitched, or the cloth part 63. The state of the sewing thread between the cloth and the cloth part 64 is shown (see the peripheral joint part 46, the joint part 67, etc. in FIG. 6). That is, the drawing in which the sewing is expressed by the third line type shows a cross-sectional structure along a cross section passing through the sewing portion.

As shown in FIGS. 5 and 6, the space between both the body cloth portions 43 and 44 and surrounded by the peripheral edge coupling portion 46 constitutes an inflating portion that is expanded and inflated by the inflating gas.
In addition, the periphery coupling | bond part 46 may be formed by the means different from the sewing using the said sewing thread, for example, adhesion | attachment using an adhesive agent. This also applies to the various coupling portions.

  As shown in FIGS. 5 and 8A, it is formed of the same material as that of the main body cloth portions 43 and 44 on the upper portion of the main body cloth portion 44 on the outside of the vehicle, more specifically, on the upper portion of the constricted portion 45. A protective cloth 47 is disposed. The protective cloth 47 has substantially the same shape and size as the upper part of the main body cloth part 44 (excluding the inner folding part 57) (see FIG. 7), and is overlapped on the upper part from the outside of the vehicle. . The protective cloth 47 is coupled to both the main body cloth sections 43 and 44 by protective coupling sections 48 provided along many peripheral edges thereof. Further, the protective cloth 47 is coupled to the main body cloth section 44 on the vehicle outer side by a linear protective coupling section 49 provided along the lower peripheral edge portion thereof.

  As shown in FIGS. 6 and 7, a reinforcing cloth 51 formed in a substantially rectangular shape by the same material as that of the main body cloth portions 43 and 44 at the center portion in the vertical direction at the rear portion in the airbag main body 41. Is arranged. The reinforcing cloth 51 is arranged in a state of straddling both the main body cloth portions 43 and 44 via the folding line 42 of the airbag main body 41. The reinforcing cloth 51 is coupled to both the main body cloth sections 43 and 44 by an annular coupling section 52 provided along the peripheral edge.

  A slit 53 extending in a direction perpendicular or substantially perpendicular to the folding line 42 is formed at the rear end portion of the airbag body 41 folded in half and in the central portion in the vertical direction. Slits 53 are also formed in corresponding portions of the reinforcing cloth 51.

  In both the main body cloth portions 43 and 44 and the reinforcing cloth 51, an endless coupling portion 54 having a horizontally long oval shape is provided around the slit 53. The endless coupling portion 54 is for reinforcing portions around the slits 53 in the main body cloth portions 43 and 44 and the reinforcing cloth 51.

  Further, in the body cloth portion 43 on the vehicle interior side, bolt holes for inserting the bolts 33 (see FIG. 4) of the retainer 32 into a plurality of locations near the fold line 42 and below the slits 53. 55 is opened. Bolt holes 55 are also formed in corresponding portions of the reinforcing cloth 51. In the main body cloth portion 43 and the reinforcing cloth 51, an annular coupling portion 56 is provided around each bolt hole 55. The annular coupling portion 56 is for reinforcing the portions around the bolt holes 55 in the main body cloth portion 43 and the reinforcing cloth 51.

  In both the main body cloth portions 43 and 44 and the reinforcing cloth 51, the upper portion of the slit 53 is an inwardly folded portion 57 that is inserted in a state of being folded inside the other portions. The upper end portion of the inner folding portion 57 is joined to the other portions of the main body cloth portions 43 and 44 by the above-described peripheral joint portion 46 and the protective joint portion 48 by co-sewing. In addition, with the formation of the inwardly folded portion 57, both slits 53 are opened, and the insertion port 58 of the gas generator 30 is formed.

<Inclined section 60>
As shown in FIGS. 6, 7, and 9 (a), an inclined partition portion 60 is disposed in the inflating portion in a state of being inclined so as to be higher toward the front side. The inclined partition 60 has the same configuration as that generally called a tether.

  The inclined partition portion 60 is formed by a single piece of cloth 61 having a substantially V shape made of the same material as the main body cloth portions 43 and 44. The inclined section 60 folds the cloth piece 61 forward along a fold line 62 set at the center portion thereof and overlaps the cloth piece 61 in the vehicle width direction, and the overlapped portion is placed between the two main body cloth portions 43 and 44. It is formed by crossing over.

  The rear lower end of the two-folded inclined partition portion 60 is a location farther upward than the lower end of the lower expansion portion 68 described later, and is disposed below the reinforcing cloth 51. In addition, the front upper end of the inclined partition portion 60 is disposed immediately below the front end of the horizontal partition portion 70 described later. Directly below is a position where the front upper end of the inclined partition 60 contacts or approaches the front end of the horizontal partition 70 from below. The inclined partition 60 may be composed of two pieces of cloth divided along the fold line 62.

  In order to distinguish the two overlapping portions of the inclined partition 60, the portion located inside the vehicle is referred to as a cloth portion 63, and the portion located outside the vehicle is referred to as a cloth portion 64. Both the cloth parts 63 and 64 are inclined so as to be higher toward the front side.

  The inclined section 60 folded in half is disposed between the two main body cloth portions 43 and 44 with the fold line 62 matched with the fold line 42 of the airbag main body 41. The cloth part 63 on the vehicle inner side is coupled to the main body cloth part 43 on the vehicle inner side by a coupling part 65 provided along the upper peripheral edge (see FIG. 6). Similarly, the cloth part 64 on the vehicle exterior side is coupled to the body cloth part 44 on the vehicle exterior side by a coupling part 66 provided along the peripheral edge on the upper side (see FIG. 5). The coupling portions 65 and 66 are both inclined so as to be higher toward the front side.

  Both the cloth parts 63 and 64 are mutually connected by the connection part 67 provided along the peripheral part of the lower side of them. Further, the front upper end portions of both the cloth portions 63 and 64 are coupled to the front end portions (constriction portions 45) of the main body cloth portions 43 and 44 by a part of the peripheral edge coupling portion 46 by co-sewing. By the coupling using the coupling parts 65 to 67, the inclined partition part 60 is bridged between the two main body cloth parts 43 and 44.

  In the inflating portion, a lower portion than the inclined partition portion 60 constitutes a lower inflating portion 68 that expands and inflates on the side of the front chest PTF and the waist PP of the occupant P1. In the inflating part, the upper part of the inclined partition part 60 constitutes the upper inflating part.

A vent hole 69 made of a round hole is formed at the rear lower end portion of each of the cloth portions 63 and 64, and the lower inflating portion 68 and the upper inflating portion are communicated with each other through these vent holes 69.
<Horizontal section 70>
As shown in FIGS. 6, 7, and 8 (a), a lateral partition 70 that extends in the front-rear direction is disposed in the upper expansion portion. Similarly to the inclined partition section 60, the horizontal partition section 70 has the same configuration as that called a tether.

  The horizontal partition part 70 is formed by a single horizontally long cloth piece 71 made of the same material as the main body cloth parts 43 and 44. The transverse section 70 folds the cloth piece 71 forward along a fold line 72 set at the center portion in the length direction and overlaps the cloth piece 71 in the vehicle width direction. It is formed by spanning between 43 and 44. In addition, the horizontal partition part 70 may consist of two cloth pieces divided along the fold line 72.

In order to distinguish the two overlapping parts of the horizontal partition part 70, the part located on the inside of the vehicle is referred to as a cloth part 73, and the part located on the outside of the car is referred to as a cloth part 74.
Then, the two-folded horizontal partition portion 70 is disposed between the main body fabric portions 43 and 44 in a state where the fold line 72 is matched with the fold line 42 of the airbag main body 41. The cloth portion 73 on the vehicle inner side is coupled to the main body cloth portion 43 on the vehicle inner side by a coupling portion 75 provided along the lower peripheral edge portion thereof. Similarly, the cloth part 74 on the vehicle exterior side is coupled to the body cloth part 44 on the vehicle exterior side by a coupling part 76 provided along the lower peripheral edge. The coupling portions 75 and 76 extend in the front-rear direction (lateral direction).

  Both the cloth parts 73 and 74 are mutually connected by the connection part 77 provided along the peripheral part of those upper side. Further, the front end portions of both the cloth portions 73 and 74 are coupled to the constricted portions 45 of both the main body cloth portions 43 and 44 by joint sewing by a part of the peripheral edge coupling portion 46 and a part of the protective coupling portion 48. ing. Due to the coupling using the coupling parts 75 to 77, the horizontal partition part 70 is bridged between the two main body cloth parts 43 and 44.

  In the upper inflating part, a lower part than the horizontal partition part 70 constitutes a supporting inflating part 78 that expands and inflates on the side of the rear chest PTR of the occupant P1. In the upper inflating part, the upper part of the lateral partition part 70 constitutes a protective inflating part 79 that expands and inflates on the side of the head PH of the occupant P1.

  A vent hole 81 made of a round hole is formed in an intermediate portion in the front-rear direction of the cloth portions 73 and 74, and the support inflating portion 78 and the protective inflating portion 79 are communicated with each other through these vent holes 81. . Each vent hole 81 has a larger diameter than each vent hole 69.

The airbag 40 is configured by the airbag body 41, the protective cloth 47, the reinforcing cloth 51, the inclined partition part 60, and the lateral partition part 70.
Most of the gas generator 30 excluding the upper end of the gas generator 30 that extends in the substantially vertical direction is the rear end portion in the support inflating portion 78 through the insertion port 58 and is behind the reinforcing cloth 51 folded in half. It is inserted through the end. An upper end portion of the gas generator 30 is exposed to the outside of the airbag body 41. Most of the gas generator 30 except the upper end portion is disposed in the support expansion portion 78. Most of this includes a gas ejection portion 31a.

  The plurality of bolts 33 in the gas generator 30 are inserted into the reinforcing cloth 51 and the main body cloth portion 43 on the vehicle inner side through the corresponding bolt holes 55. By this insertion, the gas generator 30 is locked in a state of being positioned with respect to the airbag 40. The place where the bolt 33 is inserted in this manner is an area where the cloth is reinforced by being surrounded by the annular coupling portion 56.

In FIG. 4, illustration of the reinforcing cloth 51 is omitted.
Next, a method for manufacturing the airbag module ABM having the above-described configuration will be described with reference to FIGS. 10 to 13 (a) and (b). In this manufacturing, the airbag module ABM is manufactured at two different manufacturing bases (a first manufacturing base and a second manufacturing base).

  At the first manufacturing site, as shown in FIG. 13 (b), there is an air bag module (hereinafter referred to as "module precursor ABM '") in a distribution intermediate form in which a retainer 32 is disposed in an air bag body 41. Manufactured. At this stage, the inflator 31 is not inserted into the retainer 32. The module precursor ABM ′ is transported from the first manufacturing base to the second manufacturing base. In the second manufacturing base, the inflator 31 is inserted and locked in the retainer 32 in the module precursor ABM ′.

Here, the work performed when manufacturing the module precursor ABM ′ at the first manufacturing site will be mainly described.
<First step>
In the first step, as shown in FIG. 10A, the airbag main body 41 is deployed so that the vehicle body cloth portion 43 is located on the left side and the vehicle body cloth portion 44 is located on the right side. It is done. A protective cloth 47 is overlaid on the upper side of the body cloth part 44 on the outside of the vehicle from the front side of the sheet of FIG. The protective cloth 47 is stitched to the main body cloth portion 44 along the lower peripheral edge of the protective cloth 47, so that the protective coupling portion 49 is provided. The lower peripheral edge portion of the protective cloth 47 is connected to the main body cloth portion 44 on the vehicle outer side by the protective connecting portion 49.

<Second step>
In the second step, as shown in FIG. 10B, the airbag body 41 in the deployed state, in which the protective cloth 47 is stitched as described above, is turned over. That is, in this state, the main body cloth portion 43 on the inner side of the vehicle is positioned on the right side, and the main body cloth portion 44 on the outer side of the vehicle is positioned on the left side. The protective cloth 47 is located on the back side of the paper surface of FIG.

  The reinforcing cloth 51 is superimposed on the folding line 42 so as to straddle both the main body cloth portions 43 and 44. The reinforcing cloth 51 is sewn to the two main body cloth portions 43 and 44 along the peripheral edge portion thereof, so that the annular coupling portion 52 is provided. The reinforcing cloth 51 is in a state of being coupled to both the main body cloth portions 43 and 44 by the annular coupling portion 52.

  Further, the two main body cloth portions 43 and 44 and the reinforcing cloth 51 are stitched in an oval shape so as to straddle the folding line 42, thereby providing an endless coupling portion 54 on the two main body cloth portions 43 and 44 and the reinforcing cloth 51. It is done. Furthermore, the main body cloth part 43 and the reinforcing cloth 51 are sewn in an annular shape so as to extend along the folding line 42, whereby the main body cloth part 43 and the reinforcing cloth 51 are provided with an annular coupling part 56.

<Third step>
In the third step, as shown in FIG. 11 (a), the cloth piece 61 of the inclined partition part 60 and the cloth piece 71 of the horizontal partition part 70 are developed together.

  With the fold line 62 aligned with the lower part of the fold line 42, the cloth piece 61 is overlaid on the airbag body 41 and the reinforcing cloth 51 in the deployed state. The vehicle interior cloth portion 63 is stitched to the vehicle interior fabric cloth 43 and the reinforcing fabric 51 along the upper peripheral edge portion thereof, so that the vehicle interior coupling portion 65 is provided. Similarly, the outer fabric portion 64 is stitched to the outer fabric cloth 44 and the reinforcing fabric 51 along the upper peripheral edge thereof, thereby providing the outer coupling portion 66. In this way, the fabric piece 61 is coupled to the airbag body 41 and the reinforcing fabric 51 by the coupling portions 65 and 66 in a state of straddling both the body fabric portions 43 and 44.

  The cloth piece 71 is overlaid on the airbag body 41 in the deployed state with the fold line 72 aligned with the upper part of the fold line 42. The vehicle interior cloth portion 73 is stitched to the vehicle interior fabric cloth 43 along the lower peripheral edge thereof, thereby providing the vehicle interior coupling portion 75. Similarly, the vehicle outer side cloth portion 74 is stitched to the vehicle outer side main body cloth portion 44 along the lower peripheral edge portion thereof, whereby the vehicle outer side coupling portion 76 is provided. In this manner, the cloth piece 71 is coupled to the airbag main body 41 by the coupling portions 75 and 76 in a state of straddling the two main body fabric portions 43 and 44.

<4th process>
In the fourth step, as shown in FIG. 11 (b), the bolt hole 55 is formed in a region surrounded by the annular coupling portion 56 in the main body cloth portion 43 and the reinforcing cloth 51 inside the vehicle.

  In both the main body cloth portions 43 and 44 and the reinforcing cloth 51, a slit 53 extending in a direction orthogonal or substantially orthogonal to the fold line 42 is formed in a region surrounded by the endless coupling portion 54. It is formed across.

Vent holes 69 are formed in the cloth portions 63 and 64 of the cloth piece 61. In addition, vent holes 81 are formed in the cloth portions 73 and 74 of the cloth piece 71.
<5th process>
In the fifth step, as shown in FIG. 11 (b), the upper part 82 and the protective cloth 47 of the main body cloth portions 43 and 44 above the joint portions 75 and 76 use the joint portions 75 and 76 as fulcrums. 12A is folded in the direction indicated by the arrow A in FIG. By this folding, the portion 82 and the protective cloth 47 are overlapped from the back side of the sheet of FIG. In the horizontal partition part 70, the upper part of the coupling parts 75 and 76 is exposed.

<6th process>
In the sixth step, the airbag body 41 is folded in two along the folding line 42 in the direction indicated by the arrow B in FIG. As shown in FIG. 12B, the two cloth portions 73 and 74 of the cloth piece 71 are overlapped by the two-folding.

In this state, the upper peripheral portions of the cloth portions 73 and 74 are stitched together to form the coupling portion 77.
<Seventh step>
In the seventh step, the portion 82 and the protective cloth 47 that are folded back in the two main body cloth portions 43 and 44 are inverted to the upper side in FIG. 12B with the coupling portions 75 and 76 as fulcrums. By this inversion, the part 82 and the protective cloth 47 are in a state of sandwiching the horizontal partition part 70 from both sides.

  Subsequently, in each of the main body cloth portions 43 and 44, the portion 84 below the joint portions 65 and 66 is folded back to the side away from the inclined partition portion 60 (upwardly obliquely upward) with the joint portions 65 and 66 as fulcrums. It is. The direction in which the portion 84 for each of the main body cloth portions 43 and 44 is folded back is a direction away from each other. For example, the direction in which the portion 84 of the body cloth portion 43 inside the vehicle is folded is the direction indicated by the arrow C in FIG. The direction in which the portion 84 of the body cloth portion 44 outside the vehicle is folded back is the direction opposite to the arrow C. By these folding, as shown in FIG. 13A, the lower part of the cloth piece 61 than the coupling parts 65 and 66 is exposed.

In this state, the joint portions 67 are formed by stitching the lower peripheral portions of the cloth portions 63 and 64 together.
<Eighth process>
In the eighth step, the portions 84 that are folded back in the two main body cloth portions 43 and 44 are inverted obliquely downward with the coupling portions 65 and 66 as fulcrums. By this inversion, as shown in FIG. 13 (b), the portions 84 of the two main body cloth portions 43 and 44 are in a state of sandwiching the inclined partition portion 60 from both sides.

In addition, the upper side portions of the main body cloth portions 43 and 44 above the slit 53 are inserted in a state of being bent inwardly of the other portions, so that the inner folding portion 57 is formed.
Thereafter, although not shown, the protective cloth 47 is folded back to the back side of the sheet of FIG. 13B with the protective coupling portion 49 as a fulcrum, so that the upper portion of the protective cloth 47 above the protective coupling portion 49 is the main body outside the vehicle. It is kept away from the upper part of the cloth part 44. In this state, the peripheral edge portions of the main body cloth portions 43 and 44 are stitched together to form the peripheral edge coupling portion 46. Both main body cloth parts 43 and 44 will be in the state joined by the peripheral edge joint part 46 at the bag shape.

  Subsequently, the protective cloth 47 is inverted with the protective coupling portion 49 as a fulcrum and is superimposed on the upper portion of the main body cloth portion 44. The protective joint portion 48 is formed by stitching the peripheral edge portion of the protective cloth 47 and the upper peripheral edge portions of the main body cloth portions 43 and 44 together. The protective cloth 47 is connected to the main body cloth parts 43 and 44 by the protective connecting part 48.

  The retainer 32 leaves the upper end portion of itself, and is located at the rear end portion between the main body fabric portions 43 and 44 (inside the airbag main body 41) through the insertion port 58 and at the rear end portion of the reinforcing cloth 51 folded in half. Inserted. The upper end portion of the retainer 32 is exposed to the outside of the airbag body 41 through the insertion port 58. The bolt 33 of the retainer 32 is inserted into the reinforcing cloth 51 and the bolt hole 55 of the main body cloth portion 43. Then, as shown in FIG. 13B, the retainer 32 is locked in a state of being positioned with respect to the airbag 40. In this manner, a module precursor ABM ′ in which the retainer 32 is disposed in the airbag 40 is obtained.

  The module precursor ABM ′ is made into a compact form by folding the airbag 40 and transported to the second manufacturing base. As a mode of folding the airbag 40, for example, roll folding, bellows folding or the like is suitable. Roll folding is a folding mode in which one end of the airbag 40 is the center and the other part is wound around the end. The bellows fold is a folding mode in which the airbag 40 is folded back while changing the folding direction alternately by a certain width.

  In the second manufacturing base, the inflator 31 is inserted into the retainer 32 in the module precursor ABM ′. The inflator 31 is locked to the retainer 32 by caulking the retainer 32 to the inflator 31. The airbag module ABM in a compact form (hereinafter referred to as “storage form”) that can be easily stored in the storage part 18 (see FIG. 4) having a limited size in the seat back 14 is obtained.

  When the airbag module ABM is assembled to the vehicle seat 12, the airbag module ABM is stored in the storage portion 18 as shown in FIG. 4. A bolt 33 extending from the gas generator 30 and inserted into the airbag 40 is inserted into the side frame portion 15 from the outside of the vehicle, and a nut 34 is tightened to the inserted bolt 33 from the inside of the vehicle. By this tightening, the gas generator 30 is attached to the side frame portion 15 together with the airbag 40. This operation may be performed at the second manufacturing site or may be performed at another site.

  Note that the gas generator 30 may be attached to the side frame portion 15 by a member different from the bolt 33 and the nut 34 described above. Further, the inflator 31 may be directly attached to the side frame portion 15 without using the retainer 32.

  The side airbag device includes an impact sensor 91 and a control device 92 shown in FIG. 1 in addition to the airbag module ABM described above. The impact sensor 91 includes an acceleration sensor or the like, and is provided on the side wall 11 of the vehicle 10 to detect an impact applied to the side wall 11 from the side. The control device 92 controls the operation of the inflator 31 based on the detection signal of the impact sensor 91.

  Furthermore, a seat belt device for restraining the occupant P1 seated on the vehicle seat 12 to the vehicle seat 12 is provided in the vehicle interior. Is omitted.

  As described above, the side airbag device of the present embodiment is configured. Next, the effect | action of this side airbag apparatus is demonstrated using FIG. FIG. 14 shows the change over time of the internal pressure of each expansion part in the initial stage of supply of the expansion gas. The characteristic line L1 shows the time change of the internal pressure of the support expansion part 78, the characteristic line L2 shows the time change of the internal pressure of the protective expansion part 79, and the characteristic line L3 shows the time change of the internal pressure of the lower expansion part 68. ing.

  When the impact sensor 91 does not detect that an impact is applied to the side wall portion 11 from the side, an operation signal for operating the inflator 31 is not output from the control device 92, and the inflation gas is not ejected. . The airbag body 41 continues to be stored in the storage portion 18 in the storage form.

  On the other hand, when the vehicle 10 is traveling, an impact of a predetermined value or more is applied to the side wall portion 11 due to a side collision or the like, and when this is detected by the impact sensor 91, the inflator 31 is controlled from the control device 92 based on the detection signal. On the other hand, an operation signal for operating this is output. In response to this operation signal, the expansion gas is ejected from the gas ejection portion 31a of the inflator 31. The jetted expansion gas is first supplied to the support expansion section 78, which is an expansion section where the gas ejection section 31a is disposed. Due to the expansion gas, the internal pressure of the support expansion portion 78 starts to increase (see the characteristic line L1 in FIG. 14), and the support expansion portion 78 starts to expand. At this time, the reinforcing cloth 51 protects the airbag body 41 from the heat and pressure of the inflation gas.

  As shown in FIG. 6, the support expansion portion 78 is sandwiched between the upper and lower sides by the horizontal partition portion 70 and the inclined partition portion 60. Therefore, the capacity of the support expansion part 78 is smaller than the capacity of the upper expansion part (first air chamber) described in Patent Document 1 in which the horizontal partition part 70 is not provided. Moreover, the inclined partition 60 is inclined so as to be higher toward the front side. Therefore, the capacity | capacitance of the support expansion part 78 is less than the case where the inclination division part 60 does not incline and extends in the front-back direction. Therefore, the support inflation portion 78 is filled with the inflation gas in a shorter time than the side airbag device described in Patent Document 1 and the side airbag device in which the inclined partition portion 60 is not inclined. . The support expansion part 78 becomes a high pressure at an earlier timing.

  Part of the expansion gas in the support expansion part 78 flows into the protective expansion part 79 through the vent hole 81 during the expansion and expansion of the support expansion part 78. Due to the expansion gas, the internal pressure of the protective expansion portion 79 begins to rise after the start of the increase of the internal pressure of the support expansion portion 78 (see the characteristic line L2 in FIG. 14). The protective inflating part 79 starts inflating behind the supporting inflating part 78.

  Further, another part of the inflation gas in the support inflation portion 78 flows into the lower inflation portion 68 through the vent hole 69. Due to the expansion gas, the internal pressure of the lower expansion portion 68 begins to rise after the start of the internal pressure increase of the support expansion portion 78 (see the characteristic line L3 in FIG. 14). The lower inflating part 68 starts inflating behind the supporting inflating part 78.

  In the present embodiment, the sum total of the opening areas of the vent holes 81 in the horizontal partition part 70 may be larger than the sum of the opening areas of the vent holes 69 in the inclined partition part 60. More inflation gas flows in. Therefore, the internal pressure of the protective expansion portion 79 starts to rise from a time earlier than the internal pressure of the lower expansion portion 68 (see characteristic lines L2 and L3 in FIG. 14). Accordingly, the expansion and expansion of the protective expansion portion 79 can be started earlier than the lower expansion portion 68.

  As described above, in the present embodiment, it is possible to start increasing the internal pressure in the order of the support expansion portion 78, the protection expansion portion 79, and the lower expansion portion 68. In other words, it is possible to cause a difference in the characteristics of the internal pressure between the support expansion portion 78, the protective expansion portion 79, and the lower expansion portion 68.

The expansion of the support expansion portion 78, the protective expansion portion 79, and the lower expansion portion 68 is performed with the cancellation (expansion) of the folded state.
The seat pad 16 of the seat back 14 is pressed by the airbag body 41 that is deployed and inflated, and the seat pad 16 is broken at the planned breaking portion 22 (see FIG. 4). The airbag main body 41 jumps forward from the seat back 14 through the broken portion with a part of the airbag main body 41 remaining in the storage portion 18.

  After that, the airbag main body 41 to which the inflation gas is supplied is located between the side wall portion 11 and the upper body of the occupant P1 seated on the vehicle seat 12, as shown by a two-dot chain line in FIGS. Expands and expands forward. As the airbag body 41 is deployed and inflated, the inclined section 60 is pulled to both sides in the vehicle width direction, and the tensioned state shown in FIG. Moreover, the horizontal partition part 70 is pulled to both sides in the vehicle width direction, and the tension state shown in FIG.

  As shown in FIG. 5, in the initial stage of supplying the inflation gas from the gas generator 30, the support inflation portion 78 is deployed and inflated at a high internal pressure on the side of the rear chest PTR of the occupant P <b> 1. The rear chest PTR is pressed toward the inside of the vehicle by the support expansion portion 78 having a high internal pressure. By this pressing, the vehicle outer side portion of the upper half of the occupant P1 is rotated so as to be positioned in front of the vehicle inner side portion. By this rotation, the impact from the side transmitted to the upper body through the side wall 11 is reduced.

  Further, the protective inflating portion 79 is deployed and inflated at an internal pressure lower than that of the supporting inflating portion 78 on the side of the head PH of the occupant P1. Further, the lower inflating portion 68 is deployed and inflated at an internal pressure lower than that of the support inflating portion 78 on the side of the front chest PTF and the waist PP of the occupant P1.

  As a result, the rear chest PTR, the head PH, the front chest PTF, and the waist PP are restrained by the support inflation portion 78, the protection inflation portion 79, and the lower inflation portion 68 that have been inflated with internal pressure characteristics that match shock resistance. Is done. The impact from the side transmitted through the side wall part 11 is relieved by the support expansion part 78, the protection expansion part 79, and the lower expansion part 68, and each part of the upper body is protected.

  By the way, when the protective inflating part 79 and the lower inflating part 68 are expanded and inflated, the support inflating part 78 is at a high pressure as described above. Therefore, the support inflating portion 78 supports the protective inflating portion 79 and the lower inflating portion 68, and suppresses the swinging of the protective inflating portion 79 and the lower inflating portion 68 in the front-rear direction. The support inflating portion 78, the protective inflating portion 79, and the lower inflating portion 68 are positioned in a stable posture on the side of the upper half of the occupant P1 when the deployment and the inflating are completed. The upper body of the occupant P1 is restrained and protected from the impact by the support inflating portion 78, the protective inflating portion 79, and the lower inflating portion 68 that have been expanded and inflated in this manner.

According to the present embodiment, the following effects can be obtained in addition to the above.
The rear lower end of the inclined partition part 60 is disposed above the lower end of the lower expansion part 68.
Therefore, the capacity of the support expansion portion 78 is reduced as compared with the case where the rear lower end of the inclined partition portion 60 is disposed at the lower end of the lower expansion portion 68. Accordingly, the expansion gas is quickly filled in the support expansion portion 78, and the support expansion portion 78 becomes high pressure earlier. Therefore, the effect that the support expansion part 78 suppresses the swinging of the protection expansion part 79 and the lower expansion part 68 can be obtained early.

The front upper end of the inclined partition part 60 is disposed immediately below the front end of the horizontal partition part 70.
Therefore, compared with the case where the front upper end of the inclined partition part 60 is arrange | positioned in the location far from the front end of the horizontal partition part 70 rather than just under, the capacity | capacitance of the support expansion part 78 decreases. Accordingly, the expansion gas is quickly filled in the support expansion portion 78, and the support expansion portion 78 becomes high pressure earlier. Therefore, the effect that the support expansion part 78 suppresses the swinging of the protection expansion part 79 and the lower expansion part 68 can be obtained early.

  The protective cloth 47 covers the upper part of the body cloth part 44 on the vehicle outer side (the upper part of the constricted part 45) from the vehicle outer side. In addition, the protective coupling portion 48 is located on the outer peripheral side of the peripheral edge coupling portion 46 and surrounds the peripheral edge coupling portion 46. Therefore, even if the constituent member (glass or the like) of the side wall portion 11 is broken due to a side collision or the like and scattered in the vehicle width direction, the scattered matter can be received by the protective cloth 47. Due to the scattered matter, the region surrounded by the peripheral joint portion 46 in the main body cloth portion 44 on the vehicle exterior and the peripheral joint portion 46 itself can be prevented from being damaged by the scattered matter.

In addition, the said embodiment can also be implemented as a modification which changed this as follows.
<About inflatable part>
The airbag main body 41 may be substantially entirely composed of an inflatable portion as in the above embodiment, but has a non-inflatable portion that does not inflate without being supplied with the inflation gas. It may be.

<About the gas generator 30>
-The gas generator 30 may be arrange | positioned in the aspect different from the said embodiment on condition that the gas ejection part 31a is arrange | positioned in the support expansion part 78 at least. For example, the entire gas generator 30 may be disposed in the support expansion portion 78. Further, only the gas ejection part 31 a and its peripheral part are located in the support expansion part 78, and the remaining part of the gas generator 30 is located outside the support expansion part 78, for example, in the lower expansion part 68 and the protective expansion part 79. As such, the gas generator 30 may be arranged.

<About the inclined partition 60 and the horizontal partition 70>
The inclined section 60 is sewn (coupled) in a state where the main body cloth portions 43 and 44 are in contact with each other, instead of a tether formed by tying a cloth piece between the main body cloth portions 43 and 44 of the airbag body 41. It may be configured by a seam. The same change may be made for the horizontal section 70.

The rear lower end of the inclined partition part 60 may be arranged at the lower end of the lower expansion part 68.
-The front upper end of the inclined partition part 60 may be arrange | positioned in the location far away from the front end of the horizontal partition part 70 rather than the said embodiment.

<About vent holes 69 and 81>
A plurality of vent holes 69 may be provided for each of the cloth portions 63 and 64, or only one of the cloth portions 63 and 64 may be provided.

A plurality of vent holes 81 may be provided for each of the cloth portions 73 and 74, or may be provided only on one of the cloth portions 73 and 74.
The magnitude relationship between the sum of the opening areas of the vent holes 81 and the sum of the opening areas of the vent holes 69 may be changed to a relationship different from that in the above embodiment. If it does in this way, the relationship between the quantity of the gas for expansion which flows into the protective expansion part 79 from the support expansion part 78, and the amount of the gas for expansion which flows into the lower expansion part 68 will be changed into the thing different from the said embodiment. Then, the relationship of the internal pressure increase start timing can be changed to a different one from the above embodiment.

  For example, FIG. 15 shows the change over time in the internal pressure of each expansion portion when the sum of the opening areas of the vent holes 81 and the sum of the opening areas of the vent holes 69 are set equal. In this case, the internal pressure (characteristic line L3) of the lower expansion part 68 can be started to increase from a time close to the increase start time of the internal pressure (characteristic line L2) of the protective expansion part 79.

  -The vent hole 81 in the horizontal division part 70 may be formed in the location different from the said embodiment. By doing so, it is possible to change the inflow mode of the expansion gas from the support expansion portion 78 to the protective expansion portion 79.

  -The vent hole 69 in the inclination division part 60 may be formed in the location different from the said embodiment. By doing so, the inflow mode of the expansion gas from the support expansion portion 78 to the lower expansion portion 68 can be changed.

<About the storage unit 18 of the airbag module ABM>
-The storage part 18 may be provided in the side wall part 11 instead of the seat back 14 of the vehicle seat 12, and the airbag module ABM may be incorporated therein.

<Applicable target>
The side airbag device can be applied not only to the front seat but also to the rear seat. In this case, the side wall portion 11 corresponding to the rear seat is a rear portion of a side door (rear door), a C pillar, a front portion of a tire house, a rear quarter, or the like.

  The airbag module ABM may be attached to a garnish disposed between the side wall portion 11 and the seat back. For example, a case in which the airbag module ABM is disposed may be attached to the garnish. The garnish may be formed with a planned break (tear line) that is broken by the airbag body 41.

  In this rear seat side airbag device, the garnish is pressed forward by the airbag body 41 that is deployed and inflated, and the garnish is broken at a planned breakage portion having a low strength. The airbag 40 jumps forward from the garnish through the broken portion with a part of the airbag 40 left in the case. Thereafter, the airbag main body 41 to which the inflation gas is supplied is deployed and inflated forward between the side wall portion 11 and the upper body of the occupant P1 seated on the vehicle seat (rear seat). The airbag body 41 restrains the upper body of the occupant P1. The impact from the side transmitted through the side wall portion 11 is alleviated by the airbag body 41, and the upper body is protected.

-A side airbag apparatus is applicable also to the side airbag apparatus which protects the area | region different from the said embodiment among the upper half of passenger | crew P1.
The side airbag device is configured such that in a vehicle in which the vehicle seat 12 is arranged in a posture in which the seat back 14 is different from the front of the vehicle, for example, in a sideward direction, When an impact is applied from the front-rear direction), the present invention can also be applied to a side airbag device that protects the occupant P1 from the impact.

The vehicle 10 to which the side airbag device is applied includes not only private vehicles but also various industrial vehicles.
The above-described side airbag device can also be applied to a side airbag device equipped on a vehicle seat other than the vehicle 10, for example, a vehicle or a ship.

  DESCRIPTION OF SYMBOLS 12 ... Vehicle seat (vehicle seat), 18 ... Storage part, 30 ... Gas generator, 31a ... Gas ejection part, 40 ... Air bag, 41 ... Air bag main body, 60 ... Inclined partition part, 68 ... Lower inflating part , 69, 81 ... vent hole, 70 ... horizontal partitioning part, 78 ... support inflating part (upper inflating part), 79 ... protective inflating part (upper inflating part), P1 ... occupant.

Claims (5)

A gas generator incorporated in a storage portion provided on a side of an occupant seated on a vehicle seat and ejecting an expansion gas from a gas ejection portion in response to an impact applied from the side of the vehicle seat; , Expanded by the expansion gas supplied from the gas generator, and deployed in a forward direction on the side of the occupant in a state where a part of the gas is left in the storage unit. And a side airbag device comprising an inflating airbag,
The outer shell portion of the airbag is constituted by an airbag body having an inflating portion,
The inflating portion is inclined in such a manner that the inflating portion becomes higher toward the front side, and an upper inflating portion on the upper side of the inclining division portion and a lower side on the lower side of the inclining division portion. Divided into inflatable parts,
The upper expansion portion is positioned below the horizontal partition portion by a horizontal partition portion disposed in the upper expansion portion so as to extend in the front-rear direction, and at least the gas ejection portion of the gas generator is disposed. It is divided into a support inflating part and a protective inflating part above the horizontal dividing part,
Furthermore, the side airbag apparatus in which the vent hole is formed in the said inclination division part and the said horizontal division part, respectively.   The side airbag device according to claim 1, wherein a rear lower end of the inclined partition portion is disposed above a lower end of the lower inflating portion.   The side airbag device according to claim 1 or 2, wherein a front upper end of the inclined partition portion is disposed immediately below a front end of the horizontal partition portion.   The internal pressure of the said support expansion part becomes high earlier than the internal pressure of the said protection expansion part, and the internal pressure of the said lower expansion part at the supply initial stage of the gas for expansion | swelling from the said gas generator. The side airbag device described in 1.   The side air according to any one of claims 1 to 4, wherein a total sum of opening areas of the vent holes in the inclined partition portion is set smaller than a sum of opening areas of the vent holes in the horizontal partition portion. Bag device.