JP5446972B2 - Air bag and air bag device - Google Patents

Description

  The present invention relates to an airbag and an airbag apparatus for restraining an occupant of an automobile or the like at the time of a collision or rollover, and more particularly to an airbag and an airbag apparatus in which an inflator is disposed in the airbag.

  As is well known, an airbag device is an airbag that is inflated by a gas generator at the time of collision or rollover of an automobile and the body of an occupant is received by the inflated airbag.

  In an airbag device in which an inflator is disposed in an airbag, a harness connected to the inflator is pulled out of the airbag and connected to an airbag operation control device. Japanese Patent Application Laid-Open No. 2009-166794 discloses an airbag in which a reinforcing cloth is provided on the inner surface of a bag-like base cloth in order to prevent gas leakage from the harness insertion hole. It is described that the reinforcing cloth is provided so as not to overlap the harness insertion hole.

  Japanese Patent Application Laid-Open No. 9-109821 describes that an air bag is provided with a slit-shaped opening and an inflator is inserted into the air bag through the opening.

JP 2009-166794 A JP-A-9-109821

  In Patent Document 1, the inflator is arranged in the airbag before the airbag is completely sewn (paragraph 0028 of Patent Document 1). However, if sewing is performed with the inflator being accommodated, the sewing operation is troublesome. It will be something.

  In Patent Document 2, the slit-shaped opening is provided so as to be positioned near the middle in the longitudinal direction of the inflator in a state where the inflator is disposed in the airbag. Therefore, when the inflator is disposed in the airbag, the entire inflator is inserted into the airbag from the slit-shaped opening, and then the inflator is moved backward in the direction opposite to the traveling direction at the time of insertion. Since it is necessary to arrange at the position, the inflator installation work is troublesome. Further, in Patent Document 2, since the slit-shaped opening communicates directly with the inside of the airbag, gas easily leaks from the slit-shaped opening.

  The present invention is easy to sew and can easily dispose the inflator in the inflator disposition portion in the airbag and prevent gas from leaking through the inflator insertion opening. An object is to provide a possible airbag and an airbag apparatus including the airbag.

An airbag of the present invention (Claim 1) is an airbag in which an inflator is disposed and inflated by gas from the inflator, and the bag body and an interior facing at least a part of the inner surface of the bag body A first opening for inserting an inflator is provided in the bag body, and a second opening for inserting an inflator is provided in the inner panel, the first opening and the second opening. Is disposed in the same direction away from the inflator disposition portion in the airbag, and the second opening is disposed closer to the inflator disposition portion than the first opening , An intermediate panel is disposed between the bag body and the inner panel. The intermediate panel is provided with a third opening for inserting an inflator at a position overlapping the first opening. of At least part of the edge portion of the side closer to the second opening of the parts are overhangs from the side edge closer to the second opening of the edge of the first opening toward the center of the first opening It is characterized by being.

According to a second aspect of the present invention, the airbag according to the first aspect is provided with a linear coupling portion that couples the intermediate panel and the inner panel, and the linear coupling portion includes the third opening and the second opening. It is characterized by extending so as to surround .

Airbag according to claim 3, in claim 2, wherein the linear coupling unit is characterized in that it is bound to said bag body and the intermediate panel and the inner panel.

According to a fourth aspect of the present invention, in the second or third aspect, the linear coupling portion is a stitched portion.

An airbag according to the present invention ( Claim 5 ) is an airbag in which an inflator is disposed and inflated by gas from the inflator, and the bag body and an interior facing at least a part of the inner surface of the bag body A first opening for inserting an inflator is provided in the bag body, and a second opening for inserting an inflator is provided in the inner panel, the first opening and the second opening. Is disposed in the same direction away from the inflator disposition portion in the airbag, and the second opening is disposed closer to the inflator disposition portion than the first opening, The proximal end side is located on the inner surface of the inner panel on the side farther from the first opening than the second opening, and the distal end side passes through the first opening from the second opening to the outside of the bag body. Extend the inn A guide panel for guiding the insertion of a flator is provided .

The airbag according to claim 6 is the airbag according to claim 5, wherein an intermediate panel is disposed between the bag main body and the inner panel, and the intermediate panel overlaps with the first opening or the second opening. Is provided with a third opening for inserting an inflator, extends so as to surround the second opening and the third opening, and a linear coupling portion that couples the intermediate panel and the inner panel. It is characterized by being provided .

Airbag according to claim 7, in claim 6, wherein the linear coupling unit is characterized in suture portion der Rukoto.

The airbag according to claim 8 is the airbag according to any one of claims 1 to 7, wherein each of the first opening and the second opening extends in a direction intersecting with a direction from each opening toward the inflator disposition portion. the is characterized in that you are a long hole shape.

An airbag apparatus according to the present invention (invention 9 ) includes the airbag according to any one of claims 1 to 8 and an inflator disposed in the airbag.

An airbag device according to a tenth aspect is the airbag device according to the ninth aspect , wherein the inflator has a substantially cylindrical shape, and a harness is connected to one end side in the axial center line direction of the inflator. The other end of the airbag is sequentially inserted into the first opening and the second opening and is disposed in the inflator disposition portion in the airbag.

The airbag according to the present invention (Claims 1 and 5 ) includes a bag body and an internal panel facing at least a part of the inner surface of the bag body, and the bag body includes a first for inserting an inflator. An opening is provided, and a second opening for inserting an inflator is provided in the inner panel. In the airbag of the present invention, since the first and second openings are large enough to allow the inflator to be inserted, the airbag is inserted into the airbag through the first and second openings after the airbag is sewn. Can be inserted in. Therefore, for example, as described in JP 2009-166794 A, the airbag can be sewn more easily than in the case where the inflator is disposed in the airbag before the airbag is completely sewn.

  In the airbag of the present invention, the first opening of the bag main body and the second opening of the inner panel are arranged in the same direction away from the inflator arrangement portion in the airbag, and the second The opening is disposed closer to the inflator disposition portion than the first opening. For this reason, when the inflator is disposed in the airbag, the inflator is guided through these openings toward the inflator disposition portion by sequentially inserting the inflator through the first opening and the second opening. So that it is inserted into the airbag. Thereby, it is possible to easily dispose the inflator at the inflator disposition portion in the airbag.

  In the airbag according to the present invention, as described above, the first opening of the bag body and the second opening of the inner panel are arranged so as not to overlap each other. Therefore, gas can be prevented from leaking from the inside of the airbag through these openings (including suppression, the same applies hereinafter).

As in Claim 8, the first opening and the second opening, respectively, it is preferable that a long hole shape extending in the transverse direction to the direction toward the inflator arranging portion from each opening. With this configuration, the inflator can be easily inserted into each opening.

In the airbag of the present invention ( Claim 1) , an intermediate panel is disposed between the bag main body and the inner panel, and the intermediate panel is used for inserting an inflator at a position overlapping the first opening of the bag main body. The third opening is provided. At least part of the edge of the third opening that is closer to the second opening of the inner panel is the edge of the edge of the first opening of the bag body that is closer to the second opening. It protrudes from the portion to the center side of the first opening. In this airbag, when the inflator is inserted into the airbag, the operator grasps the edge of the third opening protruding into the first opening with a finger or the like and pulls it out of the first opening. Leave it in a lip shape. In this state, the inflator is inserted between the first opening and the third opening through the gap between the edge of the first opening and the lip-shaped edge of the third opening, and is inserted between the intermediate panel and the inner panel. . The inflator is then inserted into the airbag through the second opening in the inner panel. In this airbag, since the edge of the third opening is pulled out of the first opening, the inflator does not enter between the bag main body and the intermediate panel, and the inner panel and the intermediate panel are smoothly connected. Led in between.

In this airbag, it arrange | positions so that the 1st opening of a bag main body and the 3rd opening of an intermediate | middle panel, and the 2nd opening of an internal panel may not overlap, and the gas leak from the inside of an airbag is carried out. Is prevented.

In this airbag , as described in claim 2 , it is preferable that the intermediate panel and the inner panel are coupled by the third opening and the linear coupling portion surrounding the second opening. With this configuration, even if the gas that has passed through the second opening of the inner panel presses the intermediate panel in a direction away from the inner panel, the intermediate panel is prevented from separating from the inner panel, and gas leaks are prevented. Is prevented. Moreover, it is prevented by the linear coupling part that the gas in the bag body passes between the inner panel and the intermediate panel and reaches the third opening. Therefore, gas does not leak from between the intermediate panel and the inner panel through the third opening and the first opening. Further, when the inflator is inserted into the airbag through the first, second, and third openings, the inflator that has passed through the third opening is not inserted into the airbag unless passing through the second opening.

In this airbag , as described in claim 3 , it is preferable that peripheral portions of the opening of the bag main body, the intermediate panel, and the inner panel are coupled by the linear coupling portion. By comprising in this way, it is also prevented that the gas in a bag main body passes between an intermediate | middle panel and a bag main body, and reaches | attains a 1st opening. That is, the gas in the bag body is prevented from leaking from between the intermediate panel and the bag body through the first opening.

In the airbag of the present invention ( Claim 5) , the guide panel extends from the second opening to the outside of the bag body through the first opening. When the inflator is inserted into the airbag, the inflator is inserted into the airbag smoothly along the guide panel without entering between the bag body and the inner panel.

In this airbag , as described in claim 6 , an intermediate panel provided with a third opening for inserting an inflator that overlaps the first opening or the second opening is disposed between the bag body and the inner panel. It is preferable that the intermediate panel and the inner panel are coupled by a linear coupling portion surrounding the third opening and the second opening. With this configuration, even if the gas that has passed through the second opening of the inner panel presses the intermediate panel in a direction away from the inner panel, the intermediate panel is prevented from separating from the inner panel, and gas leaks are prevented. Is prevented. Moreover, it is prevented by the linear coupling part that the gas in the bag body passes between the inner panel and the intermediate panel and reaches the third opening. Therefore, gas does not leak from between the intermediate panel and the inner panel through the third opening and the first opening. In addition, since the linear coupling portion is provided so as to surround the third and second openings, the inflator that passes through the third opening of the intermediate panel is an air bag unless it passes through the second opening of the inner panel. It is not inserted in.

In the aspect of Claim 10, the substantially cylindrical inflator in which the harness is connected to one end side in the axial direction is connected to the first opening and the second opening from the other end side in the axial direction. Since they are sequentially inserted and disposed in the airbag, the inflator can be disposed in the airbag only by inserting the inflator into the airbag in one direction through each opening. Therefore, the work for disposing the inflator in the airbag can be easily performed.

It is an elevational view of the side airbag according to the embodiment. It is a cross-sectional perspective view which follows the II-II line | wire of FIG. (A) is sectional drawing which follows the III-III line of FIG. 1, (b) is an enlarged view of the B section of (a). It is sectional drawing which follows the IV-IV line of FIG. It is sectional drawing which follows the VV line of FIG. It is sectional drawing which shows the inflator equipped with the divider | distributor. It is a horizontal sectional view of the side airbag which concerns on different embodiment. It is a block diagram of the opening vicinity of the inflator insertion opening of the side airbag which concerns on another embodiment, (a) is the sectional view on the AA line of (b), (b) is an elevational view of opening vicinity. It is sectional drawing of the opening vicinity of the inflator insertion opening of the side airbag which concerns on another embodiment. It is a block diagram of the opening vicinity of the inflator insertion opening of the side airbag which concerns on different embodiment, (a) is an elevational view of the opening vicinity, (b) is a BB line sectional view of (a), (c) FIG. 3 is a cross-sectional perspective view taken along line BB in FIG. It is a block diagram of the vicinity of the opening for inflator insertion of the side airbag according to a different embodiment, (a) is an elevation view near the opening, (b) is a cross-sectional view along line BB in (a), (c) ) Is a cross-sectional perspective view taken along line BB in FIG. It is a partial cross-sectional perspective view of the side airbag which concerns on another embodiment. It is sectional drawing which follows the XIII-XIII line | wire of FIG. It is a XIV arrow line view of FIG. FIG. 5 is a partial cross-sectional view of a side airbag according to another embodiment. It is a side view of a car seat provided with a side airbag device concerning an embodiment. It is an expanded view of the panel of an outer bag. It is an expanded view of the panel of an inner bag. It is an expanded view of a patch cloth. It is an expanded view of a patch cloth. It is a perspective view which shows the folding method of the panel of an inner bag. It is a perspective view of an inner bag. It is a perspective view which shows the folding | turning method of an outer bag. It is a perspective view which shows the insertion method of the inflator in an airbag. It is an elevational view of the side airbag according to the embodiment. FIG. 26 is a cross-sectional view of the vicinity of the inflator insertion opening of the side airbag of FIG. It is an elevational view of the side airbag according to the embodiment.

  First, a first embodiment will be described with reference to FIGS. In the following embodiments, the airbag is a side airbag, but the present invention can also be applied to various airbags such as curtain airbags and knee airbags.

  As shown in FIG. 16, a seat 1 having a seat cushion 2 and a seat back 3 is installed in the vehicle. A side airbag device 5 is installed so as to inflate the side airbag 10 between an occupant sitting on the seat 1 and a door or pillar on the side of the seat 1. In this embodiment, the side airbag device 5 is installed on the side surface of the seat back 3 so that the side airbag 10 can be inflated forward from the side edge of the seat back 3 by the gas from the inflator 6. Yes. A vent hole 7 is provided in the upper portion of the side airbag 10. As shown in FIG. 16, in this embodiment, the side airbag 10 is inflated to the left of the occupant sitting on the seat 1 (that is, for the left seat of the vehicle). The left and right (left and right for the occupant; the same applies hereinafter) may be reversed so that the occupant expands to the right (that is, for the right seat of the vehicle).

  FIG. 1 is an elevational view of the side airbag 10 as viewed from the inside of the vehicle. The side airbag 10 includes an outer bag 20 and an inner bag 30 in the outer bag 20.

  The outer bag 20 constitutes the outermost bag body of the side airbag 10. In this embodiment, two outer bag panels (hereinafter also referred to as outer panels) 21 and 22 are overlapped, and the peripheral edges thereof are stitched together by stitches 11. However, the outer bag may be one in which a single panel having a size including the outer panels 21 and 22 is folded in two and stitched at the periphery like the side airbag 10A of FIG.

  As shown in FIGS. 1, 2, and 4, the outer panel 21 of the outer bag 20 is provided with a first opening 23 for inserting the inflator 6 into the airbag near the middle in the vertical direction. In this embodiment, the first opening 23 has an elongated slot shape (slit shape) extending in the front-rear direction (the vehicle front-rear direction when the side airbag 10 is inflated and deployed in the vehicle interior; the same applies hereinafter). ). The shape of the first opening 23 is not limited to this. In this embodiment, a small hole 25 through which a stud bolt 6 c of an inflator 6 described later is inserted is provided above the first opening 23. In this embodiment, two small holes 25 are provided at intervals in the vertical direction. The first opening 23 is disposed below the lower small hole 25. A vent hole 7 (FIG. 16) is provided in the upper portion of the other outer panel 22.

  The inner bag 30 is formed by overlapping two inner bag panels (hereinafter also referred to as inner panels) 31 and 32 and stitching the peripheral edge thereof into a bag shape. The inner bag 30 is disposed at the lower part in the outer bag 20. The inner panel 31 corresponds to an inner panel. On the vertical side and the lower side of the inner bag 30, the inner panels 31 and 32 and the outer panels 21 and 22 are stitched together by the stitches 11. As shown in FIG. 5, the upper sides of the inner panels 31 and 32 are stitched together by stitches 36. In the upper part of the inner bag 30, a communication port 34 (FIG. 3A) that connects the inner bag 30 and the outer bag 20 is provided.

  The inner panel 31 is provided with a second opening 33 having substantially the same shape as the first opening 23 (that is, an elongated long hole extending in the front-rear direction) for inserting the inflator 6 into the side airbag 10. ing. The openings 23 and 33 are substantially parallel and substantially horizontal, and are arranged so as not to overlap each other. In this embodiment, the second opening 33 is provided below the communication port 34. A small hole 35 through which the stud bolt 6 c of the inflator 6 is inserted is provided in a portion of the inner panel 31 in the vicinity of the communication port 34. In this embodiment, two small holes 35 are provided at intervals in the vertical direction. As shown in FIG. 3A, each small hole 25 of the outer panel 21 is disposed so as to overlap with each small hole 35 of the inner panel 31. The second opening 23 is disposed below the lower small holes 25 and 35 and above the first opening 23.

  As shown in FIG. 1 and FIG. 3 (a), the distance from the lower small holes 25, 35 to the second opening 23 is the lower side of the inflator 6 (in the state where the inflator 6 is disposed in the inner bag 30). The lower side (the same applies hereinafter)) is longer than the length from the stud bolt 6c to the lower end surface of the inflator 6. In this embodiment, the first opening 23 is located about 25 mm below the second opening 33.

  As shown in FIG. 1, the first opening 23 and the second opening 33 are located in the middle in the left-right direction between the center of the upper small holes 25 and 35 and the center of the lower small holes 25 and 35. It arrange | positions so that it may be located on the straight line which passes both. In the present invention, the first opening 23 and the second opening 33 may be separated from the inflator disposition portion (that is, in this embodiment, the portion closest to the communication port 34 of the inner bag 30) in the same direction. Alternatively, it may be disposed above, in front of, or behind (including an oblique direction) the portion closest to the communication port 34.

  The outer panel 21 and the inner panel 31 are stitched together by the seam 12 as a linear coupling portion extending so as to surround the first opening 23 and the second opening 33.

  In this embodiment, the seam 12 extends in a substantially square annular shape on the outer surface of the panel 21. The openings 23 and 33 are located in an inner region surrounded by the annular seam 12. Note that the stitches 12 are not square but may be circular or elliptical.

  As shown in FIGS. 3 (a) and 6, the inflator 6 includes a cylindrical rod-shaped main body portion 6a, and a gas ejection portion 6b protruding from one end surface (upper end surface) of the main body portion 6a in the axial center line direction. And two stud bolts 6c erected in the radial direction from the side peripheral surface of the main body 6a. These stud bolts 6c, 6c are arranged at intervals in the axial direction of the main body 6a. A current-carrying harness 6d is connected to the other end surface (lower end surface) of the main body 6a in the axial direction. The gas ejection portion 6b has a smaller diameter than the main body portion 6a, and a plurality of gas ejection ports are provided on the outer peripheral surface thereof.

  A distributor 40 is attached to the inflator 6. The distributor 40 includes a cylindrical portion 41, an inward flanged portion 42 provided on one end surface of the cylindrical portion 41, a gas outflow hole 43 formed in the flanged portion 42, and the other end of the cylindrical portion 41. A tongue-shaped extension 44 extending from the side to be flush with the peripheral surface of the cylindrical portion 41, and a stud bolt (hereinafter simply referred to as a bolt) 6c provided in the extension 44 for insertion. And a small hole 45. The gas ejection part 6 b of the inflator 6 is inserted into the cylindrical part 41 and the bolt 6 c is inserted through the small hole 45.

  The inflator 6 with the distributor 40 assembled as shown in FIG. 6 is connected to the opening 23 of the outer bag 20 and the inner bag 30 from the distributor 40 side (that is, the upper end side of the inflator 6) as shown in FIGS. Insert into the inner bag 30 through the opening 33. The harness 6 d of the inflator 6 is pulled out of the side airbag 10 through the openings 33 and 23.

  The bolt 6c of the inflator 6 is projected out of the side airbag 10 through the small holes 35 and 25 of the inner bag 30 and the outer bag 20, as shown in FIG.

  The inflator 6 is disposed so that the distributor 40 is located in the portion closest to the communication port 34 in the inner bag 30. In other words, in this embodiment, the portion immediately adjacent to the communication port 34 in the inner bag 30 is an inflator arrangement portion. The inflator 6 is disposed in the portion closest to the communication port 34 with the axial direction of the main body 6a being substantially vertical and the distributor 40 facing upward.

  The bolt 6c is passed through a side airbag mounting member (not shown) such as a casing or a seat back frame of the side airbag device, and a nut (not shown) is fastened to the bolts 6c and 6c. The inflator 6 is fixed to the mounting member.

  The side airbag 10 is folded into a predetermined shape, and is accommodated in a casing of the side airbag device or a side airbag accommodating portion of the seat back 3, and a cover is covered to constitute the seat 1 with the side airbag device 5. The

  When a vehicle including the side airbag device 5 configured as described above receives a side collision or the like, the inflator 6 is activated to generate gas, and the side airbag 10 is inflated as shown in FIG. The inflated side airbag 10 restrains the occupant, and the gas in the side airbag 10 flows out of the vent hole 7 to absorb the impact.

In this embodiment, when the inflator 6 is actuated gas generation, is immediately supplied to the outer bag 20 through as arrow G ₁ in FIG. 6 is one half of the gas from the gas ejection portion 6b, the gas flow port 43 with other half of the gas is immediately fed into the inner bag 30 flows in the opposite direction from the street distributor cylinder portion 41 of the arrow G _2. For this reason, when the inflator 6 operates, the outer bag 20 and the inner bag 30 are inflated almost simultaneously. In addition, the gas pressure at the time of completion of expansion in the inner bag 30 is made higher than the gas pressure at the time of completion of expansion in the outer bag 20 by selecting the capacity in the inner bag 30 and the gas distribution characteristics by the distributor 40. It is preferable. The inner bag 30 inflated with high internal pressure restrains the occupant's waist.

  In the side airbag 10, since the inflator 6 can be inserted into the inner bag 30 from the openings 23 and 33 after the airbag 10 is sewn, the sewing operation of the airbag 10 can be easily performed. it can.

  In the side airbag 10, the first opening 23 of the outer bag 20 and the second opening 33 of the inner bag 30 form an inflator installation portion in the side airbag 10 (that is, inside the inner bag 30). The second opening 33 of the inner bag 30 is spaced apart from the first opening 23 of the outer bag 20. The second opening 33 of the inner bag 30 is spaced apart from the first opening 23 of the outer bag 20. It is arranged close to the portion closest to the communication port 34. Therefore, when the inflator 6 is disposed in the inner bag 30, the inflator 6 is inserted through the first opening 23 and the second opening 33 in order, so that the inflator 6 is opened to the openings 23 and 33. Is inserted into the inner bag 30 so as to be directed to the communication port 34. As a result, the inflator 6 can be easily disposed in the portion near the communication port 34 in the inner bag 30.

  In this embodiment, the inflator 6 has a substantially cylindrical shape, and is disposed with the axial center line direction being substantially vertical and the distributor 40 facing upward in the portion closest to the communication port 34. . When the inflator 6 is disposed in the inner bag 30, the inflator 6 is sequentially inserted from the distributor 40 side through the first opening 23 and the second opening 33 and disposed in the inner bag 30. By doing so, the inflator 6 is guided to the portion closest to the communication port 34 by the openings 23 and 33 only by inserting the inflator 6 into the inner bag 30 through the openings 23 and 33 in one direction. The axial center line direction is set to a substantially vertical direction, and the distributor 40 is placed on the upper side in a posture where the distributor 40 is on the upper side. Therefore, the disposition work of the inflator 6 in the inner bag 30 can be easily performed.

  In this embodiment, each of the first opening 23 and the second opening 33 has a long hole shape extending in a direction from the openings 23 and 33 toward the portion closest to the communication port 34 and a crossing direction (orthogonal direction). Therefore, it is easy to insert the inflator 6 into the openings 23 and 33.

  In the side airbag 10, the first opening 23 of the outer bag 20 and the second opening 33 of the inner bag 30 do not overlap, so that the gas in the inner bag 30 passes directly through the openings 33 and 23. The gas leakage from the inner bag 30 is prevented.

  Since the inner bag 30 restrains the occupant's waist when the side airbag 10 is inflated, it is desirable that the inflated inner bag 30 has a high internal pressure for a relatively long period of time. In this embodiment, the second opening 33 for inserting the inflator is provided in the inner bag 30 as described above, but the second opening 33 and the first opening 23 of the outer bag 20 do not overlap. Thus, gas leakage from the inner bag 30 is prevented, and the internal pressure of the inflated inner bag 30 can be maintained sufficiently high for a long period of time. As described above, according to the present invention, even if the inner bag 30 is provided with the second opening 33, gas leakage from the inner bag 30 is prevented and the internal pressure of the inflated inner bag 30 is maintained sufficiently high for a long period of time. Therefore, the degree of freedom of arrangement of the inflator insertion opening is high.

  In addition, since the inner panel 31 and the outer panel 21 are stitched in the outer peripheral portion of the openings 33 and 23 by the stitches 12 surrounding the openings 33 and 23, the gas in the inner bag 30 flows out of the opening 33, Even if the outer panel 21 is pressed away from the inner panel 31, the outer panel 21 is hardly separated from the inner panel 31, and the gas in the inner bag 30 is prevented from flowing out through the openings 33 and 23. . Further, since the inner panel 31 and the outer panel 21 are stitched together by the stitches 12 in this way, the upper gas in the outer bag 20 (the gas in the outer bag 20 and outside the inner bag 30) is exchanged with the inner panel 31. It is prevented that the air flows between the outer panel 21 and the opening 23. Therefore, the gas in the outer bag 20 is prevented from flowing out of the side airbag 10 through the first opening 23 from between the inner panel 31 and the outer panel 21.

  Since the seam 12 is provided, the inflator 6 that has passed through the opening 23 does not enter between the outer panel 21 and the inner panel 31 when the inflator 6 is inserted into the side airbag 10.

  That is, after the inflator 6 has passed through the opening 23, when trying to enter between the outer panel 21 and the inner panel 31, the inflator 6 hits the seam 12 and does not enter further inside. Therefore, the inflator 6 that has passed through the opening 23 is inserted into the inner bag 30 through the opening 33.

  In this embodiment, since the gas from the inflator 6 is distributed by the distributor 40 and supplied into the outer bag 20 and the inner bag 30 almost simultaneously, the outer bag 20 and the inner bag 30 expand almost simultaneously. For this reason, in comparison with the conventional case where the inner bag is first inflated and the outer bag is inflated by the outflow gas from the inner bag, the inflating completion time of the entire side airbag is shortened.

  In this embodiment, since the side and lower sides of the inner panels 31 and 32 are sewn together with the peripheral edge of the outer panel 21, sewing is easy.

  In the above embodiment, the inner bag is arranged in the outer bag 20, but the inner bag is eliminated, and a reinforcing patch cloth (clothing) is sewed as an inner panel on the inner surface of the outer bag 20 as the bag body. You may wear it.

  FIG. 8 shows the configuration of the side airbag 10B according to such an embodiment, and FIG. 8 (a) is a longitudinal section of the outer panel 21 in the vicinity of the opening 23 as in FIG. 3 (b). It is a figure and has shown the AA cross section of FIG. 8 (b). FIG. 8 (b) is an elevation view of the side airbag in the vicinity of the opening 21, and is a view taken along the line BB in FIG. 8 (a).

  The side airbag 10B of FIG. 8 is composed of an outer bag 20 which is a bag body, and the inner bag is omitted as described above. Similar to the side airbag 10, the outer bag 20 is formed by stitching the periphery of outer panels 21 and 22 (22 is not shown in FIG. 8) with stitches 11, and the outer panel 21 has a first opening. 23 is provided. A patch cloth 50 as an internal panel is provided on the inner surface of the outer panel 21 so as to cover the first opening 23. The patch cloth 50 is provided in the vicinity of at least the first opening 23 from the vicinity of the inflator 6. In this embodiment, the patch cloth 50 has the same shape as the upper half side of the outer panel 21, and the outer peripheral edge portion is stitched together with the outer panels 21 and 22 by the stitches 11.

  A patch cloth 50 is sewn to the outer panel 21 by the stitches 12 in the peripheral portion of the first opening 23. The seam 12 has an annular shape similar to the seam 12 of the above-described embodiment, and a first opening 23 and a second opening 51 of the patch cloth 50 are provided in an inner region thereof.

  The second opening 51 has the same shape as the first opening 23, and the openings 23 and 51 are substantially parallel. The openings 23 and 51 are spaced apart from the inflator 6 downward. The opening 51 is disposed above the opening 23 by a predetermined distance (that is, on the side closer to the inflator 6 than the opening 23), and the two do not overlap. The other configuration of the side airbag 10B is the same as that of the side airbag 10. The inflator 6 (not shown in FIG. 8) is inserted into the side airbag 10B through the openings 23 and 51.

  In FIG. 8, the patch cloth 50 is provided over the entire upper half of the outer panel 21, but it may be provided only in the vicinity of the first opening 23 from the inflator 6.

  Even in the side airbag 10B, since the inflator 6 can be inserted into the airbag 10B from the openings 23 and 51 after the airbag 10B is sewn, the sewing operation of the airbag 10B can be easily performed. it can.

  Even in the side airbag 10B, the openings 23 and 51 are arranged in the same direction (downward in this embodiment) from the inflator arrangement portion in the side airbag 10B. The second opening 51 of the patch cloth 50 inside the bag 10 </ b> B is disposed closer to the inflator disposition portion than the first opening 23 of the outer panel 21. Therefore, when the inflator 6 is arranged in the side airbag 10B, the inflator 6 is inserted into the first opening 23 and the second opening 51 sequentially, so that the inflator 6 It is inserted in the side airbag 10B so that it may be guided to 51 and heading for an inflator arrangement | positioning part. Thereby, it is possible to easily dispose the inflator 6 in the inflator disposition portion in the side airbag 10B.

  In the side airbag 10B, since the first opening 23 of the outer bag 20 and the second opening 51 of the patch cloth 50 do not overlap, the gas in the airbag 10B passes through the openings 51 and 23 directly. The gas leak from the inside of the airbag 10B is prevented.

  Further, since the patch cloth 50 and the outer panel 21 of the outer bag 20 are stitched at the outer peripheral portion of the openings 51 and 23 by the stitches 12 surrounding the openings 51 and 23, the gas in the airbag 10B is opened to the opening 51. Even if the outer panel 21 is pressed away from the patch cloth 50 and the outer panel 21 is pressed away from the patch cloth 50, the outer panel 21 hardly leaves the patch cloth 50, and the gas in the airbag 10 </ b> B flows out through the openings 51 and 23. Is prevented. Furthermore, since the patch cloth 50 and the outer panel 21 are stitched together at the stitches 12 in this way, the gas in the airbag 10B flows between the patch cloth 50 and the outer panel 21 and reaches the opening 23. It is prevented. Therefore, the gas in the airbag 10B is prevented from flowing out of the side airbag 10B through the first opening 23 from between the patch cloth 50 and the outer panel 21.

  Since the seam 12 is provided, the inflator 6 that passes through the opening 23 does not enter between the outer panel 21 and the patch cloth 50 when the inflator 6 is inserted into the side airbag 10B.

  That is, after the inflator 6 has passed through the opening 23, if the inflator 6 tries to enter between the outer panel 21 and the patch cloth 50, the inflator 6 hits the seam 12 and does not enter further inside. For this reason, the inflator 6 that has passed through the opening 23 is inserted into the airbag 10 </ b> B through the opening 51.

  Other functions and effects of the side airbag 10B are the same as those of the side airbag 10 shown in FIGS.

  Although the inner bag is omitted in FIG. 8 and the patch cloth is provided on the inner surface of the outer bag, the patch cloth may be provided on the inner surface of the inner bag. FIG. 9 is a longitudinal sectional view of the vicinity of the openings 23 and 33 of the side airbag 10C according to this embodiment, and shows a cross section of the same portion as FIG. 8 (a).

  In this embodiment, the opening 33 </ b> C of the inner panel 31 of the inner bag 30 substantially overlaps the first opening 23 of the outer panel 21. One or a plurality (two in this embodiment) of patch cloths 50 are superposed on the inner surface of the inner panel 31, and the panels 21, 31, 50, 50 is stitched. The seam 12 is annular, and openings 23, 33C, 51, 51 are provided in the inner region thereof. The second openings 51, 51 of the patch cloths 50, 50 overlap each other.

  The inner panel 31 is an intermediate panel, and the opening 33C is a third opening. The patch cloths 50 and 50 are internal panels. The opening 23 is a first opening, and the opening 51 is a second opening.

  The openings 51 and 51 and the opening 33 </ b> C have substantially the same shape as the opening 23. The opening 51 is substantially parallel and substantially horizontal with the openings 23 and 33C. Each of the openings 23, 33C, 51, 51 is arranged to be spaced downward from the inflator 6 (not shown in FIG. 9). The opening 51 is disposed a predetermined distance above the openings 23 and 33C (that is, the side closer to the inflator 6 than the openings 23 and 33C), and the two do not overlap. The other configuration of the side airbag 10C is the same as that of the side airbag 10, 10B, and the inflator 6 is inserted into the side airbag 10C through the openings 23, 33C, 51, 51.

  In FIG. 8, the patch cloth 50 is provided in the entire upper half side of the inner panel 31, but may be provided only in the vicinity of the opening 33C from the inflator 6.

  In the side airbag 10C, the inflator 6 can be inserted into the inner bag 30 from the openings 23, 33C, 51, 51 after the airbag 10C is sewn, so that the sewing operation of the airbag 10C is easy. Can be done.

  Further, even in the side airbag 10C, the openings 23, 33C, 51, 51 are arranged in the same direction (downward in this embodiment) from the inflator arrangement portion in the side airbag 10C. In addition, the second opening 51 of the patch cloth 50 disposed inside the side airbag 10C is more than the first opening 23 of the outer panel 21 and the third opening 33C of the inner panel 31 outside the patch cloth 50. It is arranged close to the inflator placement part. Therefore, when the inflator 6 is disposed in the side airbag 10C, the inflator 6 is inserted into the first opening 23, the third opening 33C, and the second opening 51 in sequence, so that the inflator 6 It is inserted into the side airbag 10 </ b> C so as to be guided by these openings 23, 33 </ b> C, 51 toward the inflator placement portion. Thereby, it is possible to easily dispose the inflator 6 in the inflator disposition portion in the side airbag 10C.

  In the side airbag 10C, the first opening 23 of the outer bag 20 and the opening 33C of the inner bag 30 do not overlap with the second opening 51 of the patch cloth 50. There is no direct passage through the openings 51, 33C, 23, and gas leakage from the inner bag 30 is prevented.

  In addition, since the patch cloth 50, the inner panel 31, and the outer panel 21 of the outer bag 20 are stitched in the outer peripheral portion of the openings 51, 33C, 23 by the stitches 12 surrounding the openings 51, 33C, 23, the inner Even if the gas in the bag 30 flows out from the opening 51 and presses the inner panel 31 and the outer panel 21 away from the patch cloth 50, the inner panel 31 and the outer panel 21 hardly move away from the patch cloth 50. The gas in the inner bag 30 is prevented from flowing out through the openings 51, 33C, 23. Furthermore, since the patch cloth 50, the inner panel 31, and the outer panel 21 are stitched together by the stitches 12 in this way, the gas in the inner bag 30 and the outer bag 20 is between the patch cloth 50 and the inner panel 31. In addition, it is prevented that the gas flows between the inner panel 31 and the outer panel 21 and reaches the openings 33C and 23. Therefore, the gas in the inner bag 30 and the outer bag 20 flows out from the side airbag 10C through the openings 33C and 23 from between the patch cloth 50 and the inner panel 31 and between the inner panel 31 and the outer panel 21. It is prevented.

  Since the seam 12 is provided, when the inflator 6 is inserted into the side airbag 10C, the inflator 6 that has passed through the opening 23 is between the outer panel 21 and the inner panel 31, and the inner panel 31 and the patch cloth. 50 or the patch cloth 50, 50.

  That is, for example, when the inflator 6 tries to enter between the outer panel 21 and the inner panel 31 after passing through the opening 23, or after entering the gap between the inner panel 31 and the patch cloth 50 after passing through the opening 33C, The inflator 6 hits the seam 12 and does not enter further. For this reason, the inflator 6 that has passed through the opening 23 is inserted into the inner bag 30 through the opening 51.

  Other functions and effects of the side airbag 10C are the same as those of the side airbag 10 shown in FIGS.

  FIG. 10 shows an airbag 10D according to an embodiment in which the inflator 6 is configured to be easily passed through the openings 23 and 33C in the embodiment of FIG. 9, and FIG. FIG. 5B is an elevation view of the vicinity of the opening 23, FIG. 5B is a sectional view taken along the line BB of FIG. 5A, and FIG.

  In this embodiment, the opening 33 </ b> C of the inner panel 31 is disposed slightly below the opening 23 of the outer panel 21, and the upper edge of the opening 33 </ b> C is located at a height facing the opening 23. Other configurations are the same as those of the airbag 10C of FIG. In this embodiment, the same effect as in FIG. 9 can be obtained. Further, in the airbag 10D of FIG. 10, when the inflator 6 is inserted into the inner bag 30, the operator grasps the upper edge of the opening 33C with a finger or the like as shown in FIG. 10 (c). 23 is pulled out and kept in a lip shape. In this state, the inflator 6 (not shown in FIG. 10) is passed between the lower edge of the opening 23 and the lip-shaped upper edge of the opening 33C, and the inner panel 31 and the patch cloth 50 are passed through the openings 23 and 33C. It inserts in between, and also inserts in the inner bag 30 through opening 51,51. Since the upper edge of the opening 33C is pulled out of the opening 23, the inflator 6 does not enter between the outer panel 21 and the inner panel 31, but is smoothly guided between the inner panel 31 and the patch cloth 50.

  In the embodiment of FIG. 10, the stitches 12 are stitched to the patch cloths 50, 50, the inner panel 31 and the outer panel 21, but like the side airbag 10E of the embodiment of FIG. Only the patch cloths 50 and 50 and the inner panel 31 may be sewn.

  FIGS. 11 (a) and 11 (b) are a sectional view and a sectional perspective view corresponding to FIGS. 10 (b) and 10 (c) of the side airbag 10E.

  Also in this side airbag 10E, the inflator 6 (not shown in FIG. 11) is smoothly opened by picking the upper edge of the opening 33C and pulling it out of the opening 23 as shown in FIG. 11 (b). 23, 33C can be guided between the inner panel 31 and the patch cloth 50.

  FIGS. 12 to 14 show an embodiment of a side airbag according to an embodiment provided with a guide panel for introducing an inflator into an airbag. FIG. FIG. 13 is a sectional view taken along line XIII-XIII in FIG. 12, and FIG. 14 is a perspective view from the XIV direction in FIG.

  The side airbag 10F includes an outer bag 20 and an inner bag 30 in the outer bag 20 in the same manner as the side airbag 10 of FIGS. 1 to 5. Is a structure in which the peripheral portions of the outer panels 21 and 22 and the inner panels 31 and 32 are stitched together by the stitches 11. Similar to the side airbag 10, the outer panel 21 and the inner panel 31 are provided with an elongated first opening 23 and a second opening 33, respectively. The arrangement of the openings 23 and 33 is the same as that of the side airbag 10.

  In this embodiment, the outer bag 20 is a bag body, and the inner panel 31 is an inner panel. Patch cloths 61 and 62 are superimposed on the inner surfaces of the inner panels 31 and 32 of the inner bag 30. The peripheral portions of the patch cloths 61 and 62 are stitched together with the outer panels 21 and 22 and the inner panels 31 and 32 by the stitches 11.

  The patch cloths 61 and 62 are disposed above the opening 33. A tongue-like or strip-shaped guide panel 63 extends from the lower edge of the patch cloth 61. The guide panel 63 may be composed of a single base fabric that is integrated with the patch cloth 61, or may be one in which a belt-like cloth is sewn on the patch cloth 61.

  The guide panel 63 is drawn out of the outer bag 21 through the openings 33 and 23.

  In the side airbag 10F, the inflator 6 (not shown in FIGS. 12 to 14) is inserted into the inner bag 30 through the openings 23 and 33 after sewing. When inserting the inflator 6, the guide panel 63 is held and the inflator 6 is inserted between the lower edge of the opening 23 and the guide panel 63. The inflator 6 moves between the outer panel 21 and the inner panel 31 along the guide panel 63, is guided to the second opening 33, and is smoothly inserted into the inner bag 30. Since the guide panel 63 is provided, the inflator 6 is prevented from entering between the inner panel 31 and the outer panel 21.

  In FIGS. 12 to 14, the seam 12 surrounding the outer panel 21 and the inner panel 31 is not provided. However, the seam 12 is the same as the seam 12 of the side airbag 10 in FIGS. 1 to 5. Seams may be provided.

  The side airbag 10G in FIG. 15 is the patch cloth 50 (along the inner surfaces of the inner panel 32 and the inner panel 32) along the inner surfaces of the inner panels 31 and 32 in the side airbag 10F in FIGS. The patch cloth is not shown in FIG. 15, and the patch cloth 50 and the inner panel 31 are stitched together by the seam 52 around the opening 33C. The seam 52 has an annular shape like the seam 12, and openings 33 </ b> C and 51 are located in the inner area of the seam 52. The openings 23 and 33C overlap each other. The opening 51 is positioned higher than the openings 23 and 33C.

  In this embodiment, the patch cloth 50 is an inner panel, and the inner panel 31 is an intermediate panel.

  A patch cloth 61 is superimposed on the inner surface of the patch cloth 50. The lower edge of the patch cloth 61 is positioned above the opening 33C. A guide panel 63 connected to the patch cloth 61 is drawn out of the airbag 10G from the opening 51 through the openings 33C and 23.

  An inflator 6 (not shown in FIG. 15) is inserted into the sewn airbag 10G. At this time, the guide panel 63 is picked and the inflator 6 is inserted between the lower edge of the opening 23 and the guide panel 63. The inflator 6 is guided along the guide panel 63 and is disposed in the inner bag 30 through the openings 23, 33 </ b> C, 51. Since the seam 52 is provided, the inflator that has passed through the opening 33 </ b> C is prevented from entering between the inner panel 31 and the patch cloth 50. Further, it is possible to prevent the gas in the inner bag 30 from reaching the opening 33C by spreading between the inner bag 31 and the patch cloth 50. Further, since the seam 52 is provided, even if the gas pressure passing through the opening 51 acts on the inner panel 31, the inner panel 31 does not move away from the patch cloth 50, and gas leaks through the openings 51, 33 </ b> C, 23. Is prevented.

  In FIG. 15, the seam 52 sews the patch cloth 50 and the inner panel 31, but the outer panel 21 may also be sewn by the seam 52.

  A side airbag 110 in which two patch cloths are arranged on the inner surface of the inner bag and one of them is provided with a guide panel will be described with reference to FIGS.

  FIG. 25 is an elevation view of the side airbag 110 viewed from the inside of the vehicle. The side airbag 110 includes an outer bag 116 and an inner bag 117 in the outer bag 116. Hereinafter, a method of sewing the side airbag 110 will be described with reference to FIGS. 17 to 24 and 26. As shown in FIG. 25, in this embodiment, the side airbag 110 is placed on the right side of the occupant sitting on the seat 1, contrary to the side airbag 10 shown in FIGS. Although it is inflatable (i.e., for the right seat of the vehicle), it can also be inflated to the left of the occupant (i.e., for the left seat of the vehicle) by reversing the left and right configurations in the figure.

  The outer bag 116 is obtained by folding the outer bag panel (outer panel) 70 shown in FIG. 17 in two and sewing the peripheral portion. The inner bag 117 is formed by the inner bag panel (inner panel) shown in FIG. ) 80 is folded and sewn together with the two patch cloths 90 and 100 shown in FIGS.

  The outer panel 70 has a left half 71 and a right half 72, and recesses 73 and 74 are formed between the left half 71 and the right half 72 on the upper and lower sides.

  The left half 71 and the right half 72 have a substantially rectangular shape having lower sides 71 a and 72 a, vertical sides 71 b and 72 b and upper sides 71 c and 72 c, and pass between the left half 71 and the right half 72. Folded in half along the center line 70C. The outer shapes of the left half 71 and the right half 72 are symmetrical with the center line 70C as the axis of symmetry. In the right half 72, a small hole 75 for passing the bolt 6 c of the inflator 6 and the inflator 6 are inserted into the side airbag 110 in the vicinity of the center line 70 C, and the harness of the inflator 6 is passed through. A slit-shaped opening 76 is provided. The left half 71 is provided with a vent hole 77 in the upper part near the vertical side 71b.

  The inner panel 80 has a left half part 81 and a right half part 82, and extends upward in the center of the upper side of the inner panel 80 across the left half part 81 and the right half part 82. An extending projection 83 is formed. On the lower side of the inner panel 80, a recess 84 is formed between the left half 81 and the right half 82.

  The left half portion 81 and the right half portion 82 are directed to the lower side 81a, 82a, the first vertical sides 81b, 82b continuous to the lower sides 81a, 82a, and the center line 80C connected to the first vertical sides 81b, 82b. The first upper sides 81c and 82c extending, the second vertical sides 81d and 82d extending upward and connected to the center line 80C side of the first upper sides 81c and 82c, and the upper ends of the second vertical sides 81d and 82d Second upper sides 81e and 82e extending toward the center line 80C, and third vertical sides 81f and 82f extending toward the center line 80C of the second upper sides 81e and 82e and extending upward. The third vertical sides 81f and 82f are connected to the upper ends of the third vertical sides 81f and 82f and have third upper sides 81g and 82g facing the center line 80C. The third upper sides 81g and 82g are connected to form a straight line and are orthogonal to the center line 80C. However, the third upper sides 81g and 82g may intersect non-linearly so as to be convex or concave upward.

  The outer shapes of the left half portion 81 and the right half portion 82 are bilaterally symmetric shapes with the center line 80C as the axis of symmetry. A small hole 85 for passing the bolt of the inflator 6 through the right half 82 and a slit-like opening 86 for inserting the inflator 6 into the side airbag 110 and passing through the harness of the inflator are provided.

  The lower sides 71a and 72a of the outer panel 70 and the lower sides 81a and 82a of the inner panel 80 have the same shape and the same size so as to be exactly overlapped. The lower part of the vertical sides 71b and 72b of the outer panel 70 and the first vertical sides 81b and 82b of the inner panel 80 have the same shape and the same size so as to overlap exactly.

  The outer panel 70 has a larger vertical length along the center lines 70 </ b> C and 80 </ b> C of the outer panel 70 and the inner panel 80. In a state where the lower sides 71a, 72a, 81a, and 82a are aligned and overlapped, the small holes 75 and 85 are disposed at positions that overlap each other, but the openings 76 and 86 are disposed at positions that do not overlap each other. These openings 76 and 86 are disposed below the small holes 75 and 85, respectively, and the opening 76 is disposed below the opening 86, that is, at a position closer to the lower sides 72a and 82a.

  The patch cloth 90 has a shape in which the left and right ends of the inner panel 80 are cut off, and the patch cloth 100 has a shape in which the lower end side of the patch cloth 90 is cut off leaving the guide panel 106. The guide panel 106 extends in the form of a tongue piece downward from the lower side of the patch cloth 100. With respect to the sides corresponding to the sides 81d, 82d, 81e, 82e, 81f, 82f, 81g, and 82g of the inner panel 30, reference numerals 91d, 92d, 91e, 92e, 91f, 92f, 91g, and 92g are attached to the patch cloth 90. In the patch cloth 100, reference numerals 101d, 102d, 101e, 102e, 101f, 102f, 101g, and 102g are assigned. The patch cloths 90 and 100 are provided with small holes 95 and 105 at positions overlapping the small holes 85 of the inner panel, respectively. Further, the patch cloth 90 is provided with a slit-like opening 96 for inserting the inflator 6 into the side airbag 110 and for passing the harness of the inflator 6. The opening 96 is disposed at a position overlapping the opening 86 of the inner panel 80.

  As shown in FIG. 21, patch cloths 100 and 90 are aligned and overlapped with the inner panel 30, and are sewn by stitches 99. In addition, the patch cloth 90 and the inner panel 80 are sewn by an annular seam 98 around the guide panel 106. The seam 98 is formed to surround the patch cloth 90 and the openings 96 and 86 of the inner panel 80. The base end portion of the guide panel 106 is also sewn to the panels 80 and 90 by the seam 98. The leading end side of the guide panel 106 is passed through the opening 86.

  The inner panel 80 is folded in half along the center line 80C as shown in FIG. 21, and the left half 81 and the right half 82 are overlapped. Then, as shown in FIG. 22, the first upper sides 81c and 82c, the second vertical sides 81d and 82d, the second upper sides 81e and 82e, and the third vertical sides 81f and 82f are stitched together with sewing threads. Reference numeral 120 indicates this stitch. In the third vertical sides 81f and 82f, the seam 120 is provided halfway in the vertical direction, and the seam 120 does not reach the top.

  In FIG. 22, the lower sides 81a and 82a, the first vertical sides 81b and 82b, and the third upper sides 81g and 82g are not sewn. The third upper sides 81g and 82g are not finally sewn, and this portion constitutes a communication port 118 (FIG. 25) for communicating the inside of the outer bag 116 and the inside of the inner bag 117.

  Next, the inner bag 117 sewed in this way is stacked on the outer panel 70 as shown in FIG. 23, and the lower side 81a, 82a and the first vertical side 81b, 82b of the inner bag 117 are placed on the left half of the outer panel 70. It matches with the lower side 71a and the vertical side 71b of the part 71. At this time, the inner panel center line 80 </ b> C that is the folded side of the inner bag 117 overlaps the center line 70 </ b> C of the outer panel 70.

  Next, the outer panel 70 is folded in half along the center line 70 </ b> C, and the right half 72 is overlapped with the left half 71. Then, as shown in FIG. 24, the lower side 71a, 72a, the vertical side 71b, 72b, and the upper side 71c, 72c are sewn with a sewing thread. Reference numeral 121 indicates this stitch.

  During the stitching, the lower sides 81 a and 82 a of the inner bag 117 and the first vertical sides 81 b and 82 b are also stitched together by the stitches 121. Thereafter, or prior to this, as shown in FIGS. 24 and 26, the guide panel 106 is extended out of the airbag 110 through the opening 76. Thereby, the side airbag 110 is completed.

  Next, the inflator 6 with the distributor 40 is inserted into the inner bag 117 of the side airbag 110 through the openings 76, 86, and 96. The inflator 6 is guided by the guide panel 106 and smoothly passes through the openings 76 and 86 and is guided to the opening 96. Since the seam 98 surrounds the openings 86 and 96, the inflator 6 is inserted into the inner bag 117 through the opening 96. Even in the side airbag 110, the openings 76, 86, and 96 are arranged in the same direction from the inflator arrangement portion in the inner bag 117, and the inner panel 80 inside the side airbag 110 is arranged. The opening 86 of the patch cloth 90 and the opening 96 of the patch cloth 90 are disposed closer to the inflator disposition portion than the opening 76 of the outer panel 70. Therefore, when the inflator 6 is disposed in the inner bag 117, the inflator 6 is guided to the openings 76, 86, 96 by sequentially inserting the inflator 6 into the openings 76, 86, 96. Then, it is inserted into the inner bag 117 so as to face the inflator placement portion. Thereby, the inflator 6 can be easily disposed on the inflator disposition portion in the inner bag 117.

  The harness 11 d of the inflator 6 is pulled out of the side airbag 110 through the openings 96, 86, 76. As shown in FIG. 25, the distributor 40 is disposed in the inner bag 117 at a portion closest to the communication port 118.

  The bolt 6c of the inflator 6 is protruded out of the side airbag 110 through the patch cloths 90, 100, the inner bag 117, and the small holes 95, 105, 85, 75 of the outer bag 116.

  The inflator 6 has a main body portion 6 a extending along folded sides (center lines) 70 </ b> C and 80 </ b> C, and the distributor 40 is located in a portion near the communication port 118 in the inner bag 117.

  In this embodiment, when the inflator 6 is operated to generate gas, one half of the gas from the gas ejection portion 6b is immediately supplied into the outer bag 116, and the other half of the gas flows in the opposite direction to enter the inner bag 117. Supplied immediately. For this reason, when the inflator 6 is operated, the outer bag 116 and the inner bag 117 are inflated almost simultaneously. By selecting the capacity in the inner bag 117 and the gas distribution characteristics by the distributor 40, the gas pressure at the completion of expansion in the inner bag 117 is made higher than the gas pressure at the completion of expansion in the outer bag 116. It is preferable. The inner bag 117 inflated by high internal pressure restrains the occupant's waist.

  In this embodiment, the gas ejection portion 6 b of the inflator 6 is disposed in the inner bag 117 in the vicinity of the communication port 118, and the vicinity of the communication port 118 of the inner bag 117 is not sewn to the outer bag 116. Further, there is no seam in the folded side portion 70C of the outer bag 116. Therefore, there is no seam in the outer bag 116 near the communication port 118.

  As described above, since there is no seam in the outer bag 116 where the high-temperature and high-pressure gas ejected from the gas ejection part 6b of the inflator 6 directly acts, reinforcement near the seam to withstand the high-temperature and high-pressure gas. Is not required to be applied to the outer bag 116. For this reason, manufacture of the side airbag 110 becomes easy.

  There is no seam in the folded side portion 70C of the inner bag 117, and there is no gas leak from the folded side portion. Even if the gas in the inner bag 117 slightly leaks from the seam 120, this gas stops in the outer bag 116.

  Other functions and effects of the side airbag 110 are the same as those of the side airbag 10 shown in FIGS.

  In each of the above-described embodiments, the first opening, the second opening, and the third opening for inserting the inflator are arranged below the inflator arrangement part in the airbag, and the inflator arrangement part is provided from these openings. However, the arrangement of the openings and the insertion direction of the inflator are not limited to this. For example, like the side airbag 10H in FIG. 27, the first opening 23 and the second opening 33 may be arranged above the inflator arrangement portion in the side airbag 10H. In this embodiment, the inflator 6 is arranged with the distributor 40 (that is, the gas ejection part 6b) facing downward in the vicinity of the middle in the vertical direction in the side airbag 10H. The second opening 33 is disposed above the inflator disposition portion and below the first opening 23. The side airbag 10H has a structure in which an inner panel or a patch cloth (not shown) is overlapped on the inner side of the outer panel, similar to the side airbag 10, 10A or 10B described above. 1 opening 23 is provided, and a second opening 33 is provided in the inner panel or patch cloth.

  Other configurations of the side airbag 10H are the same as those of the side airbag 10, 10A, or 10B.

  When the inflator 6 is inserted into the side airbag 10H, the inflator 6 is sequentially inserted into the first opening 23 and the second opening 33 from the distributor 40 side. As a result, the inflator 6 is guided to the openings 23 and 33 and is guided to the inflator placement portion in a posture with the distributor 40 facing down. Therefore, the work of disposing the inflator 6 in the side airbag 10H can be easily performed.

  Each of the above embodiments is an example of the present invention, and the present invention may be configured other than illustrated.

DESCRIPTION OF SYMBOLS 1 Seat 5 Side airbag apparatus 6 Inflator 7 Vent hole 10, 10A-10H Side airbag 11, 12, 52 Seam 20 Outer bag 21, 22 Outer panel 23 First opening 30 Inner bag 31, 32 Inner panel 33 First 2 opening 33C 3rd opening 34 Communication port 40 Distributor 50, 61, 62 Patch cloth 63 Guide panel 70 Outer panel 80 Inner panel 90,100 Patch cloth 106 Guide panel 110 Side airbag

Claims (10)

An airbag in which an inflator is disposed and inflated by gas from the inflator,
A bag body, and an internal panel facing at least a part of the inner surface of the bag body,
A first opening for inserting an inflator is provided in the bag body;
A second opening for inserting an inflator is provided in the inner panel;
The first opening and the second opening are spaced apart from the inflator placement portion in the airbag in the same direction,
The second opening is disposed closer to the inflator disposition portion than the first opening ,
An intermediate panel is disposed between the bag body and the inner panel, and the intermediate panel is provided with a third opening for inserting an inflator at a position overlapping the first opening,
Of the edge of the third opening, at least a part of the edge close to the second opening is the first edge from the edge of the first opening close to the second opening. An airbag characterized by projecting toward the center of the opening . In Claim 1 , the linear coupling part which couple | bonded the said intermediate | middle panel and the internal panel is provided,
The airbag is characterized in that the linear coupling portion extends so as to surround the third opening and the second opening. 3. The airbag according to claim 2 , wherein the linear coupling portion couples the bag body, the intermediate panel, and the internal panel. According to claim 2 or 3, the air bag, characterized in that said linear coupling portion is sewn portion. An airbag in which an inflator is disposed and inflated by gas from the inflator,
A bag body, and an internal panel facing at least a part of the inner surface of the bag body,
A first opening for inserting an inflator is provided in the bag body;
A second opening for inserting an inflator is provided in the inner panel;
The first opening and the second opening are spaced apart from the inflator placement portion in the airbag in the same direction,
The second opening is disposed closer to the inflator disposition portion than the first opening,
The proximal end side is located on the inner surface of the inner panel on the side farther from the first opening than the second opening, and the distal end side passes through the first opening from the second opening to the outside of the bag body. An airbag comprising an extended guide panel for guiding inflator insertion. In claim 5 , an intermediate panel is disposed between the bag body and the inner panel,
The intermediate panel is provided with a third opening for inserting an inflator at a position overlapping the first opening or the second opening.
An airbag that extends so as to surround the second opening and the third opening, and is provided with a linear coupling portion that couples the intermediate panel and the inner panel. The airbag according to claim 6 , wherein the linear coupling portion is a stitched portion. In any 1 item | term of the Claims 1 thru | or 7, The said 1st opening and 2nd opening are respectively the elongate hole shape extended in the direction which goes to the said inflator arrangement | positioning part from each opening, and a crossing direction. An airbag characterized by that. An airbag device comprising: the airbag according to any one of claims 1 to 8 ; and an inflator disposed in the airbag. In claim 9 , the inflator is of a substantially cylindrical shape, a harness is connected to one end side in the axial direction of the inflator,
The inflator is sequentially inserted into the first opening and the second opening from the other end side in the axial direction, and is disposed in an inflator arrangement portion in the airbag. apparatus.

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