JP4464799B2 - Air bag and air bag folding method - Google Patents

Description

  The present invention relates to an airbag that is folded and stored along, for example, the upper side of a side window portion of an automobile.

  Conventionally, an airbag apparatus having an airbag that inflates and deploys by introducing gas is formed into a flat bag shape by overlapping base fabrics and stitched, and deployed along a side window portion of an automobile. A so-called curtain airbag that protects the head is known. Before the operation, the airbag is folded and stored along the roof side rail of the automobile, and when subjected to an impact from the side, gas is introduced into the airbag, and downward along the window. Inflated and deployed.

Regarding such an airbag, a configuration is known in which the portion covered by the airbag is enlarged and, for example, the airbag is also deployed in a portion along the A pillar (see, for example, Patent Document 1). In this configuration, the airbag is attached to the vehicle body with the upper side portion fixed to the roof side portion at a predetermined interval, the front side portion fixed to the A pillar, and the rear side portion fixed to the C pillar. ing. In addition, the airbag is folded so that the lower edge is lifted upward.
JP 2003-267179 A (page 4, FIG. 1)

  However, as in the conventional case, the process of folding into a shape that can be stored along the curved portion, such as the portion from the roof side portion to the A-pillar, is complicated, and it is difficult to reduce the manufacturing cost. ing.

  The present invention has been made in view of these points, and an object of the present invention is to provide an airbag that can be easily arranged along a non-linear portion that is curved or the like.

The airbag according to claim 1 includes a base fabric constituting an outer shell, a connecting portion for connecting the base fabrics, a substantially straight upper edge portion, and a bent lower edge portion facing the upper edge portion . A deployment portion that is introduced from a folded state and is deployed along a predetermined surface that is a surface that covers the inside of the side window portion of the automobile body, and is disposed along the upper edge of the deployment portion. The non-linear other member provided on the roof side part provided at least partly along the upper side of the window part in a state where the unfolded part is bent from the straight line to the non-linear state. And the lower edge includes a parallel edge substantially parallel to the upper edge, a folding point that is a terminal part of the parallel edge, and a terminal part of the upper edge. The parallel edge and the inclined edge are substantially linear when the unfolded part is unfolded. Then, along the lower side of the window portion where the lower edge portion is substantially linear, the connecting portion is first from the first restricting portion and the upper edge portion raised from the folding point of the lower edge portion. A second restricting portion extending opposite to the distal end portion of the restricting portion, and restricting the unfolded dimension of the unfolded portion when the unfolded portion is unfolded, and the first restricting portion and the second restricting portion. A space between the main chamber and the sub-chamber that communicates with the main chamber by the communication passage is defined in the development portion .

In this configuration, the unfolded portion is configured to be folded in a straight line and then bent in a non-linear shape, so that the folding work is performed in comparison with a configuration in which it is directly folded in a non-linear shape. Becomes easier and the manufacturing cost is reduced. In addition, since the lower edge portion is almost straight when the unfolded portion is unfolded, it can cover the necessary protection area defined by a predetermined protection line, and one edge such as the window portion of an automobile is non-linear. An airbag that efficiently covers a portion where the other edge forms a straight line is provided, and the manufacturing cost of the airbag that is folded and stored in the non-linear roof side portion is reduced. In addition, since the lower edge portion is substantially linear when the deployment portion is deployed, an airbag that efficiently covers the window portion of an automobile in which one edge is non-linear and the other edge is linear is provided. Further, the connecting portion that regulates the deployment dimension of the deployment portion causes the upper and lower edge portions to bend and deform , deforms the airbag during deployment, follows other members, and follows a predetermined surface. The pressure when the passenger hits the main room becomes easier by smoothly deploying it , and the development part is divided into the main chamber and the sub chamber, and the communication passage regulates the flow of gas into the sub chamber. The escape function is realized.

The airbag folding method according to claim 2 includes a base fabric constituting the outer shell, a connecting portion for connecting the base fabrics, a substantially straight upper edge portion, and a bent lower surface facing the upper edge portion. An unfolded portion that is provided with an edge portion and gas is introduced from a folded state and expands along a predetermined surface that is a surface that covers the inside of the window portion on the side of the automobile body, and the upper edge portion of the unfolded portion. A non-linear shape provided at a roof side portion provided at least partially along the upper side of the window portion in a state where the unfolded portion is arranged in a straight line and bent in a non-linear shape. The lower edge includes a parallel edge substantially parallel to the upper edge, a fold point that is a terminal portion of the parallel edge, and the upper edge of the upper edge. An inclined edge connecting the terminal portion, and when the unfolded portion is unfolded, the parallel edge portion and the inclined edge portion are The first restricting portion and the upper edge portion that are straight and have a lower edge portion that is substantially straight along the lower side of the window portion, and the connecting portion is raised from a break point of the lower edge portion. A second restricting portion extending from the first restricting portion to the tip of the first restricting portion, and restricting the unfolded dimension of the unfolded portion when the unfolded portion is unfolded, and the first restricting portion and the second restricting portion. A folding method for an airbag, in which a communication passage is formed between the main portion and a sub-chamber that communicates with the main chamber by the communication passage , and the development portion is the upper edge portion. When the attachment portion is attached to the other member, the portion folded linearly is bent non-linearly along the other member.

In this configuration, the unfolded portion is configured to be folded in a straight line and then bent in a non-linear shape, so that the folding operation is easier than the configuration in which the unfolded portion is directly folded in a non-linear shape. Is reduced. In addition, since the lower edge portion is almost straight when the unfolded portion is unfolded, it can cover the necessary protection area defined by a predetermined protection line, and one edge such as the window portion of an automobile is non-linear. An airbag that efficiently covers a portion where the other edge forms a straight line is provided, and the manufacturing cost of the airbag that is folded and stored in the non-linear roof side portion is reduced. In addition, since the lower edge portion is substantially linear when the deployment portion is deployed, an airbag that efficiently covers the window portion of an automobile in which one edge is non-linear and the other edge is linear is provided. Further, the connecting portion that regulates the deployment dimension of the deployment portion causes the upper and lower edge portions to bend and deform, deforms the airbag during deployment, follows other members, and follows a predetermined surface. The pressure when the passenger hits the main room becomes easier by smoothly deploying it, and the development part is divided into the main chamber and the sub chamber, and the communication passage regulates the flow of gas into the sub chamber. The escape function is realized.

According to the present invention, the unfolded portion is configured to be bent in a non-linear shape after being folded in a straight line, so that the folding operation can be easily performed and the manufacturing cost can be reduced as compared with a configuration in which the unfolded portion is directly folded in a non-linear shape. Can be reduced. In addition, since the lower edge portion is almost straight when the unfolded portion is unfolded, it can cover the necessary protection area defined by a predetermined protection line, and one edge such as the window portion of an automobile is non-linear. The airbag which efficiently covers the portion where the other edge forms a straight line can be provided, and the manufacturing cost of the airbag that is folded and stored in the non-linear roof side portion can be reduced. In addition, since the lower edge portion is substantially straight when the deploying portion is deployed, it is possible to provide an airbag that efficiently covers the window portion of an automobile in which one edge is non-linear and the other edge is straight. Further, the connecting portion that regulates the deployment dimension of the deployment portion causes the upper and lower edge portions to bend and deform, deforms the airbag during deployment, follows other members, and follows a predetermined surface. In addition to being able to deploy easily and smoothly, the expansion part is divided into a main chamber and a sub chamber, and by restricting the inflow of gas into the sub chamber by the communication path, it has a pressure relief function when a passenger hits the main chamber realizable.

  Hereinafter, an embodiment of an airbag and an airbag folding method of the present invention will be described with reference to the drawings.

  1 to 3, reference numeral 1 denotes an airbag. As shown in FIG. 2, an airbag device 2 including the airbag 1 is disposed on a roof side portion 5 of a vehicle body 3 of a vehicle as a vehicle. Has been. The airbag 1 is also called a curtain airbag, a side impact airbag, a side airbag, an inflatable curtain, or a head protection airbag. It is developed in a planar shape on the side of the occupant to protect the occupant as a protected object. Hereinafter, directions such as the front-rear direction, which is a predetermined direction, and the up-down direction, which is a direction intersecting with the predetermined direction, will be described according to the direction of the straight-ahead vehicle, and the direction of arrow F is the front, arrow D The direction is downward.

  The vehicle body 3 includes a front seat and a rear seat in which a passenger can sit, and a window portion (side window) 10 that can be opened at an upper portion corresponding to the front seat and the rear seat. A door is provided. The windows 10 and the surfaces along the inside of the door constitute a predetermined surface. Further, the door edge line 10a, which is the lower end of the window 10, is a substantially horizontal straight line. Further, on both sides of the passenger compartment, an A pillar 11 also called a front pillar, a B pillar 12 also called a center pillar, a C pillar 13 and a D pillar 14 also called a rear pillar, etc. are provided in order from the front side. , 12, 13, 14 is provided with a roof side rail 15 which is a vehicle body panel constituting a mounted portion as another member. The ceiling panel is supported via the roof side rail 15. Further, a pillar garnish is attached to the passenger compartment side of each pillar 11, 12, 13, and 14, and a soft or deformable ceiling plate is provided on the passenger compartment side of the portion from the ceiling panel to the roof side rail 15. A headlining is installed. Further, an elastically deformable packing body made of a soft resin or the like is attached to the lower end portion of the roof side rail 15. Each seat is provided with a seat belt 16, and the B pillar 12 is provided with a support portion for supporting these seat belts. A portion from the A pillar 11 to the D pillar 14 via the roof side rail 15 is formed in an arc shape that is smoothly continuous and bulges upward.

  The airbag device 2 is a so-called airbag for front and rear seats that can protect passengers in the front and rear seats, and is stored in an elongated state in a roof side portion 5 surrounded by a roof side rail 15 and a head lining. The airbag 1, the inflator 17 that is stored above the rear seat and supplies gas to the airbag 1, and the cylindrical covering shown in FIG. A sleeve 18 as a member, a bracket for attaching the airbag 1 to the roof side rail, and the like are provided.

  The airbag 1 is formed by combining and stitching one or a plurality of base fabrics. As shown in FIG. 3, the airbag main body 21 is formed in a flat bag shape, and the airbag main body 21 includes the airbag body 21. And an attachment piece portion 22 constituting an attachment portion extending from a plurality of locations. The airbag body 21 includes an outer base fabric portion 24 as a base fabric portion that is a base fabric disposed on the outer side and an inner base fabric portion 25 as a base fabric portion that is a base fabric disposed on the vehicle interior side. And is sewed at a predetermined sewing part 26 as a joint part, and basically a bulging part 27 as a bag-like development part that inflates and deploys when gas flows in, and an upper rear end of the airbag main body part 21 A gas introduction port 28 that communicates with the bulging portion 27 to the outside located at a position, and a sheet portion 29 that is an intermediate non-expandable portion that does not flow and do not flow in gas in a single sheet form. The outer base fabric portion 24 and the inner base fabric portion 25 use two base fabrics, or may be formed integrally by folding a main panel, which is a single base fabric, at the folding line at the lower end. it can. When the gas is not put in the bulging portion 27 and the airbag 1 is spread on the plane, the planar shape of each base fabric portion 24, 25 is an edge of the bulging portion 27. Although the upper edge portion 27a has a slight stepped portion 27d, the upper edge portion 27a has a substantially horizontal and substantially straight line shape as a whole. On the other hand, the lower edge portion 27b as the other edge portion of the bulging portion 27 is a non-linear shape that bends at a predetermined folding point (corner point) 27c as a terminal portion in a state where no gas is put into the bulging portion 27. The rear side of this folding point 27c is a parallel edge 27e, the front side of this folding point 27c is an inclined edge 27f, the parallel edge 27e is substantially parallel to the upper edge 27a, and the inclined edge 27f is the upper edge. It is formed so as to be inclined with respect to the upper edge portion 27a so as to be connected to a tip portion 27g as a terminal portion of 27a.

  Further, the bulging portion 27 is basically an air chamber that is a hollow portion, and a gas introduction path 31 provided along an upper portion in the longitudinal direction that is the front-rear direction of the airbag main body portion 21, and this gas introduction A front seat protection part (front seat protection area) 33 as a first air chamber (bulging part) communicating with the front side part of the passage 31 and a second air chamber (expansion part) communicating with the rear side of the gas introduction path 31 And a rear seat protection section (rear seat protection area) 34 as an occupant protection section.

  Further, the sewing part 26 includes an outer peripheral sewing part 36 as an outer peripheral partition part for sewing the outer periphery of the bulging part 27, and a regulation part 37 that regulates the width dimension when the protective parts 33 and 34 are deployed. . The outer peripheral sewing portion 36 and the regulating portion 37 are formed by double sewing lines using threads, and a sealant is applied to most of the sewing lines so that air from seams or the like is applied. Leakage is suppressed, so to speak, an outer peripheral adhesive stitched portion and an inner bonded stitched portion are configured. That is, the bulging portion 27 is formed in a substantially airtight bag shape, and maintains the developed shape for a predetermined time.

  The restricting portion 37 is located at one or a plurality of locations of the bulging portion 27 and is formed integrally with or separately from the outer peripheral sewing portion 36. The front seat protection part 33 is formed with a first restricting part 41 as a connecting part, a second restricting part 42 as a connecting part, a third restricting part 43, and a fourth restricting part 44. In the rear seat protection part 34, a fifth restriction part 45 and a sixth restriction part 46 are formed. The first restricting portion 41 is formed so as to be raised from the outer peripheral sewing portion 36 located on the lower side toward the inner side of the bulging portion 27. In the present embodiment, the first restricting portion 41 It is formed in an arc shape that continues to the sewing portion 36 and bulges forward. Further, the second restricting portion 42 is formed from the outer peripheral sewing portion 36 located on the upper side toward the inside of the bulging portion 27 and bulges forward so as to face the tip portion of the first restricting portion 41. It is formed in an arc shape. The third restricting portion 43 is located in front of the first and second restricting portions 41 and 42 and is formed in a dot shape that does not connect to the outer peripheral sewing portion 36. The fourth restricting portion 44 is positioned in the rear of the first and second restricting portions 41 and 42 and is formed in a curved shape that is bent in a substantially square shape that does not connect to the outer peripheral sewing portion 36. . The first and second restricting portions 41 and 42 divide the front seat protecting portion 33 into a main chamber 33a located on the rear side and a sub chamber 33b located on the front side, and the first restricting portion 41 and The second restricting portion 42 communicates with each other via a communication path 33c.

  On the other hand, the fifth restricting portion 45 is connected to the outer periphery sewing portion 36 and extends linearly from the rear to the front, and the portion in the vicinity of the gas introduction port 28 of the gas introduction path 31 and the rear seat protection portion 34 Is partitioned. Furthermore, the sixth restricting portion 46 is positioned below the fifth restricting portion 45, is connected to the outer peripheral sewing portion 36, and is formed by bending in a substantially S shape from the front to the rear.

  In addition, an annular protective portion 37a is formed at the terminal portion of each restricting portion 37. Each protective portion 37a is formed of a double sewing line using a thread, as with the outer peripheral sewing portion 36 and the regulating portion 37, and is formed airtight by applying a sealing agent along the sewing line. . In addition, the 3rd control part 43 is formed only by the protection part 37a.

  In order to sew the sewing parts 26 and the like, first, a sealing agent is applied to either the outer base cloth part 24 or the inner base cloth part 25, and the outer base cloth part 24 and the inner base cloth part 25 are then applied. The outer peripheral sewing part 36 and the restricting part 37 are formed by sewing with a sewing machine. Further, by using a sewing machine provided with two needles, two rows of sewing lines are formed by one operation.

  Further, an inner sleeve 58, which is a conduit portion that is communicated with the gas introduction port 28 and formed into a cylindrical shape by folding the base cloth or the like, is inserted in the rear end portion of the gas introduction path 31. The inner sleeve 58 is positioned on the outer periphery sewing portion 36 by sewing together.

  A plurality of attachment pieces 22 are formed at predetermined intervals on the upper edge of the airbag main body 21, and each is attached with a metal bracket. For example, each attachment piece 22 is formed integrally with the base fabric constituting the airbag main body 21, and is formed by stitching each other in a state where the outer base fabric portion 24 and the inner base fabric portion 25 are overlapped. . In the present embodiment, as shown in FIG. 3 and the like, nine attachment pieces 22a to 22i are formed.

  The sleeve 18 is also called wrapping or the like. For example, as shown in FIG. 1 (c) and FIG. 1 (e), the edges 18c and 18d of nonwoven fabric made of polyester or the like are overlapped and sewn, and both ends are sewn. It is formed in an elongated cylindrical shape having openings 18e and 18f. The sleeve 18 is formed with perforations and the like along the longitudinal direction, and a planned fracture line 18a having a lower strength than other portions. Further, the sleeve 18 is formed with slots 18b which are cut at predetermined intervals along the longitudinal direction.

  And the manufacturing process of the airbag apparatus 2 starts the lower end part of the airbag main-body part 21 from the state which spread the airbag 1 on the plane, for example, the flat work table, as shown to Fig.1 (a). Fold it so that it is close to the upper end, for example, as shown in FIG. 1 (b), fold it so that it winds from the lower edge 27b of the airbag body 21, and fold the vicinity of the upper end in a long wave shape Then, the airbag body 21 is folded into a predetermined elongated and substantially straight bar shape along the upper edge portion 27a. In addition, although the cross-sectional shape of the folding of the airbag main body portion 21 can take various shapes, the folding cross-sectional shape forms a stacking portion by folding the lower side portion into a roll shape, and the upper side portion is The accumulation portion is a parasol-shaped guide portion that wraps from both sides, and the accumulation portion is arranged and folded inside the guide portion. Here, since the upper edge portion 27a of the bulging portion 27 of the airbag 1 is formed substantially in a straight line with the step portion 27d, the lower edge portion 27b is positioned at the folding tip, The folding method in which the edge portion 27a is positioned at the base end of the folding is easily realized.

  Then, as shown in FIGS. 1 (c) and 1 (d), the elongated airbag body 21 is inserted from the opening at the rear end of the sleeve 18 and pulled forward, and each mounting piece 22 is respectively connected to the sleeve. It is pulled out from a slot 18b provided in 18. Next, a bracket is attached to each attachment piece 22, and each attachment piece 22 is fixed to the roof side rail 15 together with this bracket with a bolt. At this time, as indicated by a broken line in FIG. 1 (d), the airbag main body 21 folded linearly is gently curved according to the shape of the roof side rail 15 and the like. Even if the airbag main body 21 is bent in this way, the sectional shape of the fold does not basically change, that is, no twist or sharp fold occurs.

  On the other hand, the inflator 17 is held by a bracket 17a of a holding bracket, which is also called a retainer, and is fixedly attached to the roof side rail 15 or the like, and the gas injection port is connected to the gas introduction port 28 via the gas introduction pipe 17b. Connecting. The gas introduction pipe 17b is also provided with a bracket 17c that is fixed to another member. The gas introduction pipe 17b is airtightly connected to the gas introduction port 28 of the airbag 1 by a hose band 17d.

  Further, the inflator 17 is electrically connected to a control device (not shown) via a harness 17e and the like.

  And the airbag apparatus 2 attached in this way is covered with a headlining, and the airbag apparatus 2 is attached to the roof side portion 5.

  In the airbag device 2, the inflator 17 is actuated by the control device in the event of a side collision that receives an impact from the side of the vehicle body 3, and the gas injected from the inflator 17 is the gas in the airbag 1. It is introduced into the front seat protection part 33 and the rear seat protection part 34 from the introduction port 28 via the gas introduction path 31, and the bulging part 27 is inflated while breaking the expected fracture line 18a of the sleeve 18, thereby deforming the head lining and the like. As shown in FIG. 2, the airbag 1 is inflated and deployed downward along the window 10 as shown in FIG. 2, that is, covers the front and rear windows 10 in the form of a curtain. The head and chest of each occupant in the seat and the rear seat will be protected, and the occupant will be released from the vehicle. The front seat protection section 33 is divided into a main chamber 33a and a sub chamber 33b, and the flow of gas into the sub chamber 33b is restricted by the communication passage 33c. Therefore, first, the internal pressure of the main chamber 33a increases. Then, the internal pressure of the sub chamber 33b increases. In this way, by delaying the expansion of the sub chamber 33b, a pressure relief function when an unoccupied occupant hits the main chamber 33a, that is, an action as a pressure adjusting vent in the airbag 1, is realized. Yes.

  When the airbag 1 is deployed, the deployment dimension of the bulging portion 27 is regulated by the regulation portion 37 that connects the base fabric portions 24 and 25, and the portion of the regulation portion 37, particularly the first and second portions. The restricting portions 41 and 42 and the fourth restricting portion 44 cause so-called wrinkles, so that the bulging portion 27 develops into a shape different from the state where no gas is introduced. In particular, the first restricting portion Due to the wrinkles generated along 41, the front side portion of the bulging portion 27 is deformed so as to be lowered downward, and smoothly expands along the shape of the window portion 10. That is, in the lower edge portion 27b of the airbag 1, the parallel edge portion 27e and the inclined edge portion 27f are bent at the break point 27c, but can be compared with FIG. 2 at the time of deployment and FIG. 3 before the deployment. After the expansion, the bending angle between the parallel edge portion 27e and the inclined edge portion 27f is relaxed, and the expansion is performed in a substantially linear shape approximating the line 10a of the linear door edge.

  As described above, according to the present embodiment, the airbag main body 21 is folded and stored along the roof side rail 15 that is a curved portion above the window frame of the vehicle body 3 of the automobile. The airbag 1 is deployed and covers at least a part of the window 10 in the window frame, and the upper edge 27a is attached to the upper edge 27a along the curved roof side rail 15. 27a is substantially straight in a state where gas is not introduced into the airbag 1 and is spread out on a plane. Therefore, the airbag 1 can be handled easily in the folding process, that is, the airbag 1 can be folded. It becomes easy and the manufacturing cost of the airbag 1 and the airbag apparatus 2 can be reduced.

  The airbag 1 folded into a straight bar shape can be easily attached along the roof side rail 15 while being curved, and the cost required for attaching the airbag device 2 to the vehicle body 3 can be reduced.

  In addition, since the airbag 1 can be easily disposed in a curved portion, it can be easily disposed and attached along the entire area of the body 3 of the automobile from the A pillar 11 to the D pillar 14. It becomes easy to smoothly develop the entire area along the entire length in the longitudinal direction, and the occupant protection performance can be easily improved.

  Further, since the airbag 1 is formed in such a shape that the lower edge portion 27b of the airbag body portion 21 extends along the door edge line 10a, which is the lower edge of the window frame, in the deployed state, Covers the entire area of the window 10 including the front end corner of the front window, secures a wide area that can absorb shocks, improves the occupant's protection performance, and effectively uses the gas from the inflator 17 to provide an airbag device 2 can be easily reduced in size and manufacturing cost. That is, the lower edge portion 27b of the airbag main body 21 is bent at a folding point 27c, and the deployment shape of the airbag 1 is controlled by the regulating portion 37 such as the first regulating portion 41 that is a connecting line. At the point 27c or the like, bending deformation can be generated in the lower edge portion 27b of the airbag main body 21, so that the shape of the airbag main body 21 at the time of deployment can easily follow the shape of the window portion 10. Further, since the second restricting portion 42 corresponding to the curved portion of the window frame of the window portion 10 and extending inward of the airbag 1 from the upper edge portion 27a is provided, the upper edge portion 27a is also bent and deformed. The shape of the airbag 1 when deployed can easily follow the shape of the window portion 10.

  In this way, it is possible to provide a so-called curtain airbag that can be easily folded and easily attached to the non-linear portion of the vehicle body 3 and that is stably and smoothly deployed.

  Further, the airbag 1 can be constituted by a regulating portion 37 constituted by a cut shape of a base fabric and a sewing line, and a member called a strap for supporting the front end portion of the airbag 1 can be eliminated and the structure is simplified. The manufacturing cost can be reduced.

  The upper edge 27a being substantially linear is not necessarily limited to a complete straight line, and includes a configuration in which the upper edge 27a is curved with a predetermined curvature, and this curvature is determined by the upper edge 27a. The same effect can be obtained as long as it is smaller than the attached roof side rail 15 and can be easily folded.

  Further, the restricting portion 37 is not limited to the above configuration, and various configurations can be adopted.

The configuration of the lower edge portion 27b of the airbag main body 21 along the door edge line 10a that is the lower edge of the window frame is only required to match the direction, the lower edge portion 27b and the door edge line 10a In addition, the lower edge portion 27b may be positioned below the line 10a, or the lower edge portion 27b may be positioned above the line 10a .

  The present invention can be applied to, for example, an airbag that is deployed along a side window of an automobile.

It is explanatory drawing of the folding process which shows one embodiment of the airbag of the present invention, (a) is in a state where it is spread in a flat shape, (b) is in a state where it starts to fold from the lower edge, (c) is folded A state before the airbag is inserted into the sleeve, (d) is a state where the folded airbag is inserted into the sleeve and the inflator is connected, (e) is a sectional view taken along the line II of (d), and (f) is ( II) II-II sectional drawing of d), (g) is III-III sectional drawing of (d). It is explanatory drawing of the state which the airbag same as the above developed. It is explanatory drawing of the state unfolded on the plane of the airbag same as the above.

1 Airbag 3 Car body 5 Roof side
10 Window
15 Roof side rails as other components
22 Mounting piece constituting the mounting part
Outer base fabric part as 24 base fabric
Inner base fabric part as 25 base fabric
27 The bulging part as the development part
27a on the edge
27b lower edge
27c Break as terminal
27e Parallel edge
27f Inclined edge
27g Tip as terminal
33a main room
33b secondary room
33c passage
41 1st restricting part as connecting part
42 Second restriction part as connecting part

Claims (2)

It has a base fabric that constitutes the outer shell, a connecting portion that connects these base fabrics, a substantially straight upper edge portion, and a bent lower edge portion that opposes this upper edge portion, and gas is introduced from the folded state. An unfolding portion that unfolds along a predetermined surface that is a surface that covers the inside of the side window portion of the car body ;
A roof disposed along the upper edge portion of the unfolded portion, and at least partly provided along the upper side of the window portion in a state where the unfolded portion is folded from a straight line to a non-linear shape. An attachment part attached to another non-linear member provided on the side part ,
The lower edge portion has a parallel edge portion substantially parallel to the upper edge portion, and an inclined edge portion connecting a break point that is a terminal portion of the parallel edge portion and a terminal portion of the upper edge portion. When the portion is deployed, the parallel edge portion and the inclined edge portion are substantially linear, and the lower edge portion is substantially linear, along the lower side of the window portion,
The connecting portion includes a first restricting portion raised from a break point of a lower edge portion, and a second restricting portion extending from the upper edge portion to the front end portion of the first restricting portion, The expansion dimension of the expansion portion is restricted when the portion is expanded, and a communication passage is formed between the first restriction portion and the second restriction portion, and the main chamber and the sub chamber communicated with the main chamber by the communication passage. An air bag characterized in that a section is formed in the deployment part . It has a base fabric that constitutes the outer shell, a connecting portion that connects these base fabrics, a substantially straight upper edge portion, and a bent lower edge portion that opposes this upper edge portion, and gas is introduced from the folded state. An unfolding portion that unfolds along a predetermined surface that is a surface that covers the inside of the side window portion of the car body;
A roof disposed along the upper edge portion of the unfolded portion, and at least partly provided along the upper side of the window portion in a state where the unfolded portion is folded from a straight line to a non-linear shape. An attachment portion attached to another non-linear member provided on the side portion,
The lower edge portion has a parallel edge portion substantially parallel to the upper edge portion, and an inclined edge portion connecting a break point that is a terminal portion of the parallel edge portion and a terminal portion of the upper edge portion. When the part is deployed, the parallel edge part and the inclined edge part are substantially linear, and the lower edge part is substantially along the lower side of the window part,
The connecting portion includes a first restricting portion raised from a break point of a lower edge portion, and a second restricting portion extending from the upper edge portion to the front end portion of the first restricting portion, The expansion dimension of the expansion portion is restricted when the portion is expanded, and a communication passage is formed between the first restriction portion and the second restriction portion, and the main chamber and the sub chamber communicated with the main chamber by the communication passage. Is a folding method of an airbag in which a section is formed in the deployment part ,
The unfolded portion is folded linearly along the upper edge, and when the mounting portion is attached to the other member, the portion folded linearly is bent non-linearly along the other member. Air bag folding method.

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