JP2006088986A - Head protection airbag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a head protection airbag capable of softly protecting a head of an occupant. <P>SOLUTION: The head protection airbag 18 is constituted such that it is folded and stored at an upper edge side of a window and is deployed and inflated so as to cover an indoor side of the window by making an inflation gas from an inflator flowing-in. The airbag 18 is provided with a bag body 19; and a cover part 37 arranged so as to cover a periphery of the bag body 19 at completion of inflation. The cover part 37 is provided with an outdoor side portion 38 covering the outdoor side of the bag body 19 at completion of inflation over the approximately whole surface; and an indoor side portion 39 for covering the indoor side of the bag body 19 over the approximately whole surface. The outdoor side portion 38 and the indoor side portion 39 are bonded to each other in the state that the portions at both front and rear edge 37b, 37c sides are separated from the bag body 19 respectively. The portion at the upper edge side 37a is bonded to the upper edge 19a side of the bag body 19. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a head protection airbag configured to be folded and housed on the upper edge side of a window inside a vehicle and to be expanded and inflated so as to cover the inside of the window by flowing in inflation gas from an inflator. About.

Conventionally, the head protection airbag has a configuration including a bag body that is inflated by inflating an inflating gas, and a protective cloth that covers at least the inside of the bag body when the inflation is completed (for example, Patent Document 1). In this head protection airbag, the bag body combines a gas inflow portion that inflates so that inflation gas flows in and separates the vehicle interior side wall and the vehicle exterior wall, and the vehicle interior side wall and vehicle exterior wall. And a non-inflow portion configured to prevent the inflating gas from flowing in, and when the airbag is completely inflated, the inside of the non-inflow portion is covered with a protective cloth.
JP 2004-182026 A

  In the conventional head protection airbag, when the airbag is completely inflated, the inside of the non-inflow portion is covered with a protective cloth that is supported by the gas inflow portion of the bag body. Even if it interferes with a portion near the inflow portion, the head of the occupant can be accurately protected by the protective cloth. However, in the conventional head protection airbag, since both ends of the protective fabric facing each other are coupled to the bag body, the protective fabric is provided when the airbag is completely inflated. When the bag body or the occupant's head moves while the bag body interferes with the occupant's head and the bag body and the head move relative to each other, the protective cloth follows the bag body. As a result, there is a problem in softly protecting the occupant's head because the friction is caused by shifting with respect to the occupant's head.

  The present invention solves the above-described problems, and an object of the present invention is to provide a head protection airbag capable of softly protecting an occupant's head.

The head protection airbag according to the present invention is folded and housed on the upper edge side of the window on the inner side of the vehicle, and is expanded and inflated so as to cover the inner side of the window by introducing an inflating gas from the inflator. Being configured,
The gas inflow portion configured to be inflatable so that the inflating gas is allowed to flow in to separate the vehicle inner wall portion and the vehicle outer wall portion from each other, and the vehicle inner wall portion and the vehicle outer wall portion are combined to prevent the inflation gas from flowing in. A bag body having a non-inflow portion configured as described above,
A cover portion arranged to cover the periphery of the bag body at the completion of the expansion;
In a head protection airbag having a configuration comprising:
The cover portion includes a vehicle outer side portion covering substantially the entire vehicle exterior side of the bag body at the time of completion of expansion, and a vehicle interior portion covering substantially the entire vehicle interior side of the bag body,
In the state where the front and rear both sides are separated from the bag body, the vehicle exterior part and the vehicle interior part are mutually coupled,
The upper edge side portion is combined with the upper edge side of the bag body, and is characterized in that it is configured.

  In the head protection airbag according to the present invention, the cover portion that covers the substantially entire outer peripheral side of the bag body when the inflation is completed is joined to the bag body side only on the upper edge side. On the other hand, it can be displaced in the front-rear direction or upward. Therefore, in the airbag when the inflation is completed, the bag body or the occupant's head moves with the occupant's head interfering with the cover part, and the bag body and the head move relatively. However, the cover portion does not follow the bag body but follows the occupant's head. As a result, in the head protection airbag of the present invention, it is possible to suppress the cover portion from being displaced with respect to the occupant's head and causing friction between the occupant's head and the cover portion.

  Further, in the head protection airbag of the present invention, the cover portion is configured such that the vehicle outer side portion and the vehicle inner side portion are combined with each other on the front and rear edge sides in a state separated from the bag body. As the bag body disposed on the inner peripheral side expands so as to separate the vehicle inner wall portion and the vehicle outer wall portion, the bag outer portion and the vehicle inner portion of the cover portion also complete the expansion of the bag main body. In some cases, they will be spaced apart from each other. That is, in the case of an airbag configured such that a non-inflow portion is disposed between the expansion portions of the gas inflow portion, when the bag body is completely inflated, the vehicle outer side portion and the vehicle inner side portion of the cover portion are portions near the non-flow portion. In this case, a space is provided between each non-inflow portion and the portion is arranged in a somewhat stretched state. For this reason, even when the head of the occupant interferes with a portion that is in the vicinity of the non-inflow portion when the expansion of the bag body is completed, the occupant is Can protect the head.

  Therefore, in the head protection airbag of the present invention, the passenger's head can be protected softly.

  Further, in the head protection airbag having the above-described configuration, if the cover portion has a configuration in which the vehicle outer side portion and the vehicle inner side portion are coupled to each other in a state where the lower edge side portion is separated from the bag body, In the completed air bag, it is preferable that the cover portion can be prevented from rolling upward, and the vehicle interior portion of the cover portion can be reliably interposed between the head of the occupant and the bag body.

Furthermore, in the head protection airbag of the above configuration, the cover portion and the bag body are both made of woven fabric,
The bag body is composed of a coated fabric with a coating layer for preventing gas leakage on the woven fabric,
You may comprise a cover part from the non-coat cloth which does not have a coating layer.

  If the head protection airbag is configured as described above, the bag body can maintain the internal pressure even after completion of the inflation, and at the same time, a coating layer having a high friction coefficient is applied to the outer surface of the cover portion that interferes with the head of the occupant. Since it is not arranged, the friction coefficient of the surface of the vehicle inner side in the cover part that interferes with the occupant's head can be reduced, and the friction generated between the occupant's head and the cover part can be further reduced. Can be suppressed.

Further, as the head protection airbag, the cover portion is composed of a coated fabric provided with a coating layer for preventing gas leakage on the woven fabric, and the vehicle outer portion and the vehicle inner portion disposed on the periphery. The binding site to which is bound is a substantially bag shape that is continuously arranged over the entire circumference,
You may comprise a bag main body from the uncoat cloth which does not have a coating layer.

  In the head protection airbag having the above-described configuration, the cover portion formed of the coated cloth has a substantially bag shape in which the coupling sites are continuously disposed over the entire circumference. Even if the inflation gas leaks from the bag body constituted by the above, the inflation gas can be prevented from flowing out of the cover portion, and the internal pressure of the airbag itself can be maintained for a long time. Further, in the head protection airbag having the above-described configuration, if the coating layer is provided on the inner surface side of the cover portion, the cover portion that interferes with the occupant's head as in the case of the head protection airbag described above. It is possible to reduce the coefficient of friction on the surface of the vehicle interior part, and it is possible to further suppress the friction generated between the occupant's head and the cover.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The head protection airbag according to the present invention is used in a head protection airbag device M mounted on a vehicle V shown in FIG. 1, and includes doors and windows W1 and W2 on the inside of the vehicle, and rear pillar portions RP. Folded and housed in a portion of the roof side rail portion RR on the upper edge side. In this vehicle V, a front pillar portion FP is disposed in front of the window W1, and a center pillar portion CP is disposed between the windows W1 and W2.

  As shown in FIG. 1, the head protection airbag device M is configured to include an inflator 8, mounting brackets 9 and 13, mounting bolts 10 and 14, and an airbag 18, and when mounted on the vehicle V, The vehicle interior side I is covered and stored in an airbag cover 16 (see FIG. 7). In the embodiment, the airbag cover 16 is configured from a lower edge side portion of the roof head lining 4 that covers the vehicle interior I of the roof side rail portion RR.

  The roof head lining 4 is made of synthetic resin and is attached to the vehicle inner side of the inner panel 2 that is a member on the body 1 side in the roof side rail portion RR by an attaching means (not shown). And these lower edge side parts are comprised so that the lower end side can be opened inside a vehicle so that the airbag 18 at the time of deployment inflation can be protruded.

  The inflator 8 has a substantially cylindrical shape, and has a structure in which a gas discharge port (not shown) capable of discharging an inflation gas is disposed on the tip (front end) side. And this inflator 8 inserts the vicinity of the front end including the vicinity of the gas discharge port into the gas inlet portion 22 of the airbag 18, and uses the clamp 11 that is externally installed near the rear end of the gas inlet portion 22. It is connected to the airbag 18. The inflator 8 is attached to the inner panel 2 using a mounting bracket 9 for holding the inflator 8 and a mounting bolt 10 for fixing the mounting bracket 9 to the inner panel 2 on the body 1 side. .

  The inflator 8 is mounted on the vehicle V as an airbag assembly in which the inflator 8 and the airbag 18 are assembled.

  In the folded state, the airbag 18 extends from the position above the rear end of the front pillar part FP to the position above the center pillar part CP and above the rear pillar part RP. , Stored. And the airbag 18 is comprised so that the vehicle inner side of each of the windows W1 and W2, the center pillar part CP, and the rear pillar part RP may be covered as shown by a two-dot chain line in FIG. In the case of the embodiment, as shown in FIGS. 2 to 5, the airbag 18 includes a bag body 19 and a cover portion 37 disposed so as to cover the outer peripheral surface of the bag body 18 when the inflation is completed. Has been.

  In the case of the embodiment, the bag body 19 is formed from a woven fabric using polyester yarn, polyamide yarn, or the like, and is integrally formed by bag weaving. The bag body 19 is formed in a substantially rectangular plate shape when the inflation is completed, and can inflate the inflation gas G into the interior so as to separate the interior wall portion 20a and the exterior wall portion 20b from each other. The gas inflow part 20 is constituted by a non-inflow part 29 that joins the inner wall part 20a and the outer wall part 20b to prevent the inflation gas G from flowing in.

  In the embodiment, the gas inflow portion 20 includes a gas supply path portion 21, a gas inflow port portion 22, and a protective expansion portion 23.

  The gas supply path portion 21 is disposed along the front-rear direction of the vehicle V on the upper edge 19 a side of the bag body 19. In the case of the embodiment, the gas supply path portion 21 is disposed so as to connect upper ends of vertical expansion portions 24A and 24C, which will be described later, in the protective expansion portion 23. Further, the gas supply path portion 21 is configured to guide the expansion gas G discharged from the inflator 8 to the protective expansion portion 23 disposed below the gas supply path portion 21. A gas inlet 22 connected to the inflator 8 is provided at an intermediate portion in the front-rear direction of the gas supply passage 21 (portion on the upper side of the longitudinal expansion portion 24B in the embodiment). 21 is disposed so as to project upward from the bag body 19. In the case of the embodiment, the gas inlet port 22 is configured by opening the rear end side.

  The protective inflating portion 23 is a portion that is disposed so as to cover the vehicle inner side of the windows W1 and W2 and protects the head of the occupant when the expansion of the bag body 19 is completed. In the case of the embodiment, the protective inflating portion 23 is configured by arranging three vertical inflating portions 24A, 24B, and 24C arranged in the front-rear direction at the time of completion of expansion. The two vertical expansion portions 24A and 24B disposed on the front end side are disposed in the region of the window W1 when the expansion is completed, and constitute a front side protection portion 25 that protects the head of the occupant seated in the front seat. Will be. One longitudinal expansion portion 24C on the rear end side is disposed in the region of the window W2 when expansion is completed, and constitutes a rear side protection portion 26 that protects the head of the occupant seated in the front seat. .

  The non-inflow portion 29 includes an attachment portion 30, a peripheral edge coupling portion 31, a partition portion 32, and a plate-like portion 33. The peripheral edge coupling portion 31 is disposed at the outer peripheral edge portion of the bag body 19 so as to surround the periphery of the gas inflow portion 20.

  A plurality (five in the embodiment) of the attachment portions 30 are disposed so as to protrude upward from a portion 31a on the upper edge side of the peripheral edge coupling portion 31 on the upper edge 19a side of the bag body 19. An attachment bracket 13 for attaching the airbag 18 to the inner panel 2 is fixed to each attachment portion 30 (see FIG. 7). Each mounting portion 30 is fixed to the inner panel 2 on the body 1 side together with the mounting bracket 13 using the mounting bolts 14.

  The partition portion 32 is disposed so as to partition the longitudinal expansion portions 24A and 24B in the region of the front protection portion 25, and protrudes upward from a portion on the lower edge side of the peripheral joint portion 31 as a band shape. It is configured as such. The plate-like portion 33 is arranged in a rectangular plate shape below the gas supply path portion 21 between the front protection portion 25 and the rear protection portion 26.

  And the bag main body 19 of embodiment is the structure which has arrange | positioned the coating layer 35 over the outer peripheral surface over the whole surface (refer FIGS. 3-5). The coating layer 35 is formed by applying a gas leakage prevention coating agent made of silicon or the like. The coating layer 35 is formed on the outer surface side of the vehicle interior side wall portion 20a and the vehicle exterior wall portion 20b so as to cover the entire outer peripheral surface of the bag body 19 after the bag body 19 is woven by bag weaving. Yes.

  The cover portion 37 covers the vehicle inner side I and the vehicle outer side O of the bag main body 19 at the time of completion of expansion over substantially the entire region, and is disposed on the vehicle outer side of the bag main body 19 and has the same outer shape as the bag main body 19. The base fabric constituting the vehicle exterior portion 38 and the base fabric constituting the vehicle interior portion 39 arranged in the vehicle interior of the bag main body 19 with the same shape as the base fabric constituting the vehicle exterior portion 38. And two base fabrics. The base fabric constituting the cover portion 37 is composed of a woven fabric formed by plain weaving using polyester yarn, polyamide yarn or the like, and in the case of the embodiment, is composed of an uncoated fabric having no coating layer. .

  In the case of the embodiment, the cover portion 37 includes the suture thread 40 in a state where the vehicle outer side / vehicle inner side portions 38 and 39 are separated from the bag body 19 at the front and rear edges 37b and 37c side. Is used for sewing. Further, the cover portion 37 has a vehicle outer side / vehicle inner side portion 38/39 at a portion on the upper edge 37a side, a portion 31a on the upper edge side of the peripheral edge coupling portion 31 in the bag body 19, and a peripheral portion of the gas inlet portion 22. The sewing thread 40 is used for sewing. In the case of the embodiment, the cover portion 37 has a width dimension in the front-rear direction substantially equal to the width dimension in the front-rear direction of the bag body 19, and the stitched portions on the front and rear edges 37 b and 37 c side are connected to the bag body 19. It is set to be arranged in the vicinity of the edge. Further, the cover portion 37 is set to have a width dimension in the vertical direction that can cover up to the lower edge of the bag body 19 when the bag body 19 is completely inflated. In the case of the embodiment, the stitched portion 41 of the cover part 37 is removed from the front edge 37b of the cover part 37 through the upper edge 37a to the rear edge 37c, except for the opening part of the gas inlet part 22. Are arranged continuously over the entire circumference.

  Next, mounting of the airbag 18 of the embodiment on the vehicle V will be described. After the bag body 19 is manufactured by bag weaving, a coating layer 35 is formed by applying a coating agent over the entire outer surfaces of the vehicle inner wall portion 20a and the vehicle outer wall portion 20b. Thereafter, on the upper edge 19 a side of the bag main body 19, the vehicle outer side / vehicle inner side parts 38 and 39 constituting the cover part 37 are sewn using the suture thread 40, and both front and rear edges 37 b and 37 c of the cover part 37 are sewn. If the side is separated from the bag body 19 and sewn using the suture thread 40, the airbag 18 can be manufactured. Thereafter, the airbag 18 is folded. Specifically, as shown in a two-dot chain line in FIG. 2, the airbag 18 that is flatly spread is sequentially inserted into a crease C between a mountain fold and a valley fold along the front-rear direction, and the lower edge 18b. The bag body 19 and the cover part 37 are both folded in a bellows so that the side approaches the upper edge 18a side.

  Then, after folding, a predetermined portion of the airbag 18 is wrapped with a wrapping material (not shown) for preventing collapse, and the attachment bracket 13 is attached to each attachment portion 30. Further, while using the clamp 11, the inflator 8 is connected to the gas inlet portion 22, and then the mounting bracket 9 is attached to the periphery of the inflator 8, and the inflator 8 is assembled to the airbag 18 to form an airbag assembly. Keep it.

  Thereafter, the mounting brackets 9 and 13 are arranged at predetermined positions on the inner panel 2 and fastened with bolts 10 and 14, and the airbag assembly is attached to the body 1. Next, a lead wire (not shown) extending from a predetermined control device for operating the inflator is connected to the inflator 8, and the roof head lining 4 is attached and fixed to the body 1, and further, the front pillar garnish 3, the rear pillar garnish 6, and the center If the pillar garnish 5 is attached to the body 1, the airbag 18 is mounted on the vehicle V together with the airbag device M.

  If the inflator 8 is operated after the airbag device M is mounted on the vehicle V, the inflation gas G from the inflator 8 is supplied from the gas inlet 22 to the gas supply path as shown by the two-dot chain line in FIG. It flows in the part 21. Further, the expansion gas G flows from the gas supply passage portion 21 into the protective expansion portion 23, and the protective expansion portion 23 starts to expand together with the cover portion 37 while canceling the folding. Then, the airbag 18 breaks a wrapping material (not shown), and further pushes open the airbag cover 16 constituted by the lower edge of the roof head lining 4 so as to protrude downward, as shown by a two-dot chain line in FIG. The windows W1 and W2, the center pillar portion CP, and the rear pillar portion RP are greatly expanded so as to cover the inside of the vehicle.

  And, in the head protection airbag 18 of the embodiment, the cover portion 37 that covers the entire outer peripheral side of the bag body 19 at the completion of the inflation is coupled to the bag body 19 side only on the upper edge 37a side, The cover part 37 can be displaced in the front-rear direction or upward with respect to the bag body 19. Therefore, in the airbag 18 when the inflation is completed, the bag body 19 or the occupant's head moves with the occupant's head interfering with the cover portion 37, and the bag body 19 and the head relatively move. Even if this happens, the cover portion 37 does not follow the bag body 19 but follows the occupant's head. As a result, in the head protection airbag 18 according to the embodiment, it is possible to prevent the cover portion 37 from being displaced with respect to the occupant's head and causing friction between the occupant's head and the cover portion 37. .

  Further, in the airbag 18 of the embodiment, the vehicle outer side portion 38 and the vehicle inner side portion 39 are sewn in a state where the cover portion 37 is separated from the bag body 19 on both the front and rear edges 37b and 37c. Since the bag body 19 disposed on the inner peripheral side expands so as to separate the vehicle inner wall portion 20a and the vehicle outer wall portion 20b, the vehicle outer portion of the cover portion 37 is configured. 38 and the vehicle interior side portion 39 are also arranged so as to be separated from each other when the expansion of the bag body 19 is completed. That is, as in the embodiment, in the case of the airbag 18 having the configuration in which the partition portion 32 and the plate-like portion 33 are respectively disposed between the vertical inflating portions 24A, 24B, and 24C, when the inflating of the bag main body 19 is completed. The vehicle outside portion 38 and the vehicle inside portion 39 in the cover portion 37 are provided in the vicinity of the partition portion 32 and the plate-like portion 33 so as to provide a space between the partition portion 32 and the plate-like portion 33, respectively. It will be arranged in a stretched state to some extent (see FIGS. 3 and 5). Therefore, even if the occupant's head interferes with a portion near the partition portion 32 or the plate-like portion 33 in the vehicle interior portion 39 of the cover portion 37 when the expansion of the bag body 19 is completed, The occupant's head can be protected by the vehicle interior portion 39 in a state of floating away from the portion 32 and the plate-like portion 33.

  Therefore, in the head protection airbag 18 of the embodiment, the head of the occupant can be protected softly.

  Further, in the airbag 18 of the embodiment, the bag body 19 is constituted by a coated cloth provided with a coating layer 35 for preventing gas leakage on a woven cloth, and the cover portion 37 is formed by a non-coated cloth having no coating layer. And make up. Therefore, the bag body 19 can maintain the internal pressure even after completion of the expansion, and at the same time, the coating layer 35 having a high friction coefficient is not disposed on the outer surface of the cover portion 37 that interferes with the head of the occupant. The friction coefficient of the surface of the vehicle interior side 39 in the cover portion 37 that interferes with the occupant's head can be reduced, and the friction generated between the occupant's head and the cover portion 37 can be further suppressed. .

  Next, the airbag which is 2nd Embodiment of this invention is demonstrated. As shown in FIGS. 8 to 10, the airbag 43 of the second embodiment is disposed so as to cover the bag body 44 and the outer peripheral surface of the bag body 44 when the inflation is completed, as with the airbag 18 described above. And a cover portion 46. The bag main body 44 is made of bag weaving, similar to the bag main body 19 described above. The bag body 44 has the same configuration as that of the above-described bag body 19 except that the bag body 44 is made of a non-coated cloth having no coating layer, and the same members are denoted by the same reference numerals and description thereof is omitted. .

  Similar to the cover portion 37 in the airbag 18 described above, the cover portion 46 covers the vehicle inner side I and the vehicle outer side O of the bag main body 44 when the inflation is completed, and covers the vehicle outer side of the bag main body 44. And a base fabric constituting the vehicle exterior portion 47 whose outer shape is set to be substantially the same as that of the bag main body 44, and the same shape as the base fabric constituting the vehicle exterior portion 47 so as to be located on the vehicle interior side of the bag main body 44. It is comprised from the base fabric which comprises the vehicle interior part 48 arrange | positioned, and two base fabrics. The base fabric constituting the cover portion 46 is composed of a woven fabric formed by plain weaving using polyester yarn, polyamide yarn or the like, and in the case of the embodiment, a coated fabric provided with a coating layer 35 on the inner peripheral surface side. Is made up of.

  And the cover part 46 is similar to the cover part 37 in the airbag 18 described above, and the vehicle outer side / inner vehicle side parts 47 and 48 are connected to the upper edge side of the peripheral edge coupling part 31 in the bag main body 44 at the part on the upper edge 46a side. The part 31a is sewn using a suture 40. In addition, the cover portion 46 is in a state where the vehicle outer side / vehicle inner side portions 47 and 48 are separated from the bag main body 44 at the front edge 46b side, the rear edge 46c side, and the lower edge 46d side. The sewing thread 40 is used for sewing. In the case of the embodiment, the stitched portion 49 of the cover portion 46 is continuously arranged around the entire periphery of the cover portion 46 except for the opening portion of the gas inflow port portion 22. That is, in the airbag 43 of the second embodiment, the cover portion 46 is configured in a bag shape.

  Also in the airbag 43 of the second embodiment, the cover 46 is sewn to the bag body 44 only on the upper edge 46a side, and the front edge 46b side and the rear edge 46c side are separated from the bag body 44, respectively. In this state, since the vehicle exterior portion 47 and the vehicle interior portion 48 are sewn together, the same effects as the airbag 18 described above can be achieved.

  In the airbag 43 of the second embodiment, the vehicle outer portion 47 and the vehicle inner portion 48 are sewn in a state where the cover portion 46 is separated from the bag body 44 at the portion on the lower edge 46d side. Due to this configuration, the cover portion 46 can be prevented from rolling upward in the airbag 43 when the inflation is completed, and the vehicle interior portion 48 of the cover portion 46 is reliably provided between the occupant's head and the bag body 44. Can be interposed, which is preferable.

  Furthermore, in the airbag 43 of the second embodiment, the cover portion 46 is made of a coated cloth in which the coating layer 35 is disposed, and the vehicle exterior portion 47 and the vehicle interior portion 48 that are disposed at the periphery are provided. Since the sewn suture part 49 is formed in a substantially bag shape continuously arranged over the entire circumference, in the airbag 43 after the completion of the inflation, the inflation gas is supplied from the bag body 44 made of a non-coated cloth. Even if it leaks, the inflation gas can be prevented from flowing out of the cover portion 46, and the internal pressure of the airbag 43 itself can be maintained for a long time. Further, in the airbag 43 of the embodiment, since the coating layer 35 is disposed on the inner surface side of the cover portion 46, the cover portion 46 that interferes with the occupant's head, as with the airbag 18 described above. It is possible to reduce the friction coefficient of the surface 48 of the vehicle interior side, and to further suppress the friction generated between the head of the passenger and the cover 46. Of course, if such a point is not taken into consideration, the coating layer may be disposed on the outer surface side of the cover portion.

  In the embodiment, the bag main body 19/44 is formed of a bag weave. Of course, the bag main body is formed by stitching the periphery of a base fabric made of a woven fabric formed of a plain weave having a predetermined shape. A suture bag may be used. In the airbags 18 and 43 of the embodiment, either the bag body 19 or 44 or the cover part 37 or 46 is formed of a coated cloth. Of course, as the airbag, the bag body and the cover part are formed. Both may be formed from a coated cloth.

It is the schematic front view seen from the vehicle inner side of the head protection airbag apparatus in which the airbag which is one Embodiment of this invention is used. It is a front view which shows the state which expand | deployed the airbag of the embodiment flat. It is an expanded sectional view of the III-III site | part of FIG. It is an expanded sectional view of the IV-IV site | part of FIG. It is an expanded sectional view of the VV part of FIG. In the airbag of the same embodiment, it is the development which arranged the bag main body and the base fabric which comprises a cover part. It is a general | schematic expanded sectional view of the VII-VII site | part of FIG. It is a front view which shows the state which expand | deployed the airbag of other embodiment of this invention flatly. It is an expanded sectional view of the IX-IX part of FIG. It is an expanded sectional view of the XX site | part of FIG.

Explanation of symbols

8 ... Inflator,
18.46 ... Airbag,
19.44 ... Bag body,
20: Gas inflow part,
20a ... the inner wall of the vehicle,
20b ... car outer wall part,
29 ... non-inflow part,
35 ... coating layer,
37.46 ... cover part,
38.47 ... car exterior part,
39.48 ... car interior part,
49 ... suture site,
V ... Vehicle,
W1, W2 ... windows,
M: Head protection airbag device.

Claims (4)

Folded and stored on the upper edge side of the window on the vehicle interior side of the vehicle, and is configured to expand and expand so as to cover the vehicle interior side of the window by flowing in the inflation gas from the inflator,
A gas inflow portion configured to be inflatable so as to allow the inflation gas to flow in and separate the vehicle inner wall portion and the vehicle outer wall portion from each other, and the vehicle inner wall portion and the vehicle outer wall portion are coupled to each other. A bag body having a non-inflow portion configured not to flow in,
A cover portion disposed so as to cover the periphery of the bag body at the completion of the expansion;
In a head protection airbag having a configuration comprising:
The cover portion includes a vehicle exterior portion that covers substantially the entire vehicle exterior side of the bag body at the time of completion of expansion, and a vehicle interior portion that covers substantially the entire vehicle interior side of the bag body,
In the state where the front and rear edges are separated from the bag body, respectively, the vehicle outer portion and the vehicle inner portion are mutually coupled,
A head protection airbag characterized in that an upper edge side portion is coupled to an upper edge side of the bag body.   The said cover part is comprised by mutually connecting the said vehicle outer side part and the said vehicle inner side part in the state isolate | separated from the said bag main body in the part of a lower edge side. The head protection airbag described. The cover part and the bag body are both made of woven fabric,
The bag body is composed of a coated fabric provided with a coating layer for preventing gas leakage on the woven fabric,
The head protection airbag according to claim 1 or 2, wherein the cover part is made of a non-coated cloth not having the coating layer. The cover part and the bag body are both made of woven fabric,
The cover portion is composed of a coated cloth provided with a coating layer for preventing gas leakage on the woven cloth, and the vehicle outer portion and the vehicle inner portion disposed on the periphery are combined. The site is a substantially bag shape that is continuously arranged over the entire circumference,
The head protection airbag according to claim 2, wherein the bag body is made of an uncoated cloth that does not have the coating layer.

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