JP4186989B2 - Seal structure of vehicle hood airbag device - Google Patents

Description

  The present invention relates to a seal structure for a hood airbag device for a vehicle that inflates and deploys an airbag on the upper surface side of a hood at the time of collision with a collision body.

  In Patent Document 1 below, an opening that is long in the vehicle width direction is formed on the rear end side of the hood, and the opening is covered with a cover (lid) that can be unfolded. In order to prevent water from entering the airbag case, there is disclosed a vehicle hood airbag device provided with a bowl-shaped water receiving portion and drainage water guiding material.

According to the said structure, water, such as rain water, which entered from the parting part of a cover and opening enters into a bowl-shaped water receiving part, and is drained by a water conveyance material. This prevents water from entering the airbag case and prevents parts in the engine room from getting wet.
Japanese Patent No. 3245489

  However, according to the above prior art, there is room for improvement in the points described below.

  That is, the airbag module may be assembled from the lower side of the hood for some reason, for example, for ease of assembly. Specifically, it is conceivable that an opening for module assembly is formed in the hood inner panel, and the airbag module is assembled into the hood through the opening from the lower side of the hood inner panel.

  When the above configuration is adopted, it is necessary to seal the mating portion so that water does not fall into the engine room from the mating portion between the module assembly opening and the airbag module. However, when the airbag is large, the opening for module assembly also increases in the vehicle width direction, and it is difficult to completely seal the opening. Therefore, the prior art has room for improvement from this viewpoint.

  In view of the above fact, the present invention is a vehicle hood airbag apparatus that can effectively prevent water from entering the engine room from around the airbag module when the airbag module is assembled from the lower side of the hood. The purpose is to obtain a sealing structure.

According to a first aspect of the present invention, there is provided a seal structure for a vehicle hood airbag device according to the present invention, comprising: a gas generating means for injecting gas at the time of a frontal collision with a collision body; and a gas generating means stored in a folded state and generated by the gas generating means. An airbag that expands and deploys on the hood by expanding a cover that covers the bag inflation opening formed on the hood outer panel after receiving supply, and an airbag case that houses the gas generating means and the airbag; A hood airbag for a vehicle, in which an airbag module including the hood inner panel is inserted into an assembly opening formed in the hood inner panel from the lower side of the hood inner panel and fixed to the periphery of the assembly opening. a seal structure applied to the apparatus, together with the cover is assembled from the upper side of the bag-expansion opening, the cowl louver The sealing material which is held and forms a seal line is elastically pressed against the lower surface of the rear bottom portion of the airbag case, and the front and rear walls of the airbag case are connected to the hood inner panel from the assembly opening of the hood inner panel. and is inserted between the outer hood panel and the upper end portion of the front wall and the rear wall is located proximate to the cover, and, as seen in the bottom standard of the hood inner panel, the hood inner panel and the airbag case It is characterized in that the front side matching part is set at a position higher than the rear side matching part of the hood inner panel and the airbag case.

According to a second aspect of the present invention, in the seal structure of the hood airbag device for a vehicle according to the first aspect, the length in the hood front-rear direction of the bag bulging opening is an upper opening portion of the airbag case. The front and rear walls of the airbag case are housed inside the bag inflation opening so that the length of the front and rear walls of the airbag case is longer than the length of the hood in the front-rear direction. It is characterized by having a diaphragm shape bent toward the inner side of the case .

  According to the first aspect of the present invention, when a frontal collision with a collision body such as a pedestrian occurs, gas is ejected by the gas generating means. The ejected gas is supplied into the airbag stored in the airbag case in a folded state, and inflates the airbag. As a result, the cover is deployed by the bag inflation pressure, and the airbag is inflated and deployed on the hood from the bag inflation opening formed in the hood outer panel. As a result, a collision body such as a pedestrian is received by the inflated and deployed airbag, and the collision energy at the time of the collision is absorbed, so that the reaction force received by the collision body such as a pedestrian from the vehicle body can be reduced.

Here, in the present invention, the cover is assembled from the upper side of the bag inflation opening formed in the hood outer panel, and the airbag module is inserted into the assembly opening formed in the hood inner panel. Since it is inserted from the lower side of the panel and fixed to the periphery of the assembly opening, if water enters the hood inner panel, it is from the mating part with the hood inner panel in the airbag case There is a concern that water may leak and fall below the hood inner panel, that is, into the engine room.

However, in the present invention, since the front side matching part of the hood inner panel and the airbag case is set at a position higher than the rear side matching part of the hood inner panel and the airbag case, as viewed from the bottom surface of the hood inner panel, the engine Water is unlikely to leak from the front side mating portion of the airbag case closer to the room. In particular, since the hood is inclined with a downward slope from the rear end toward the front end, the effect of preventing water intrusion is great even by adopting the above structure.
In addition, since the sealing material, which is held by the cowl louver and forms a seal line, is elastically pressed against the lower surface of the rear bottom portion of the airbag case, water temporarily leaks from the rear mating portion below the hood inner panel. Even so, it is received by the cowl louver, flows into the cowl, and drains out of the vehicle from both sides of the cowl. Therefore, there is no worry of water falling into the engine room.

According to the second aspect of the present invention, the hood front-rear direction length of bag-expansion opening formed in the hood outer panel is set to be longer than the hood front-rear direction length of the upper opening of the airbag case As shown, the front and rear walls of the airbag case are housed inside the bag inflation opening, and the upper ends of the front and rear walls are bent inward of the airbag case. since there is a, enters the mating portion between the cover and the bag-expansion openings water can not enter into the air bag case and reaches the bottom falls onto the hood inner panel.

  Here, in the present invention, as described above, when viewed from the bottom surface of the hood inner panel, the front side matching portion of the hood inner panel and the airbag case is positioned higher than the rear side matching portion of the hood inner panel and the airbag case. Since it is set, it is very unlikely that water will leak from the front side mating part of the airbag case and fall into the engine room.

  As described above, the seal structure of the hood airbag device for a vehicle according to claim 1 has the hood inner panel and the airbag case at the front side of the hood inner panel and the airbag case as viewed from the bottom surface of the hood inner panel. Since it is set at a position higher than the rear side fitting part of the case, when the airbag module is assembled from the lower side of the hood, water can be effectively prevented from entering the engine room from around the airbag module. Has an excellent effect.

The seal structure of the hood airbag device for a vehicle according to the second aspect of the present invention is such that the length in the hood front-rear direction of the bag inflating opening is greater than the length in the hood front-rear direction of the upper open portion in the airbag case. The front and rear walls of the airbag case are housed inside the bag inflation opening and the upper ends of the front and rear walls are bent inward of the airbag case. In addition to the effect of the present invention as set forth in claim 1, water is effectively prevented from entering the airbag case from the mating portion of the cover and the bag inflating opening. It has an excellent effect of being able to.

  Hereinafter, an embodiment of a seal structure for a vehicle hood airbag device according to the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow IN indicates the vehicle width direction inner side.

  FIG. 3 is an external perspective view of the vehicle 12 in a state in which the vehicle hood airbag device 10 according to the present embodiment is activated. FIG. 2 is an external perspective view of the vehicle 12 on which the vehicle hood airbag device 10 is mounted. Further, FIG. 1 is a longitudinal sectional view (an enlarged sectional view taken along line 1-1 in FIG. 2) of a state in which the vehicle hood airbag device 10 in an assembled state is cut from the vehicle longitudinal direction. It is shown.

  As shown in these drawings, the vehicle hood airbag device 10 is disposed along the vehicle width direction on the rear end side of the hood 14 that opens and closes the engine room 13. The hood 14 constitutes a hood outer plate and a hood outer panel 16 constituting a design surface of the hood 14, and is arranged at a position spaced apart from the hood outer panel 16 by a predetermined distance to the vehicle lower side to constitute a hood inner plate. The hood inner panel 20 is configured to be included.

  As shown in FIG. 2, a bag inflation opening 18 that is long along the hood width direction (vehicle width direction) is formed on the rear end side of the hood outer panel 16. The bag bulge opening 18 is formed in a substantially rectangular shape in plan view. Correspondingly, as shown in FIG. 1, the assembly opening having the same shape as the bag bulging opening 18 is located at the position facing the bag bulging opening 18 in the hood inner panel 20. A hood inner side opening 26 as a part is formed.

  An airbag module 22 is disposed below the bag inflation opening 18. The airbag module 22 includes a high-strength lower plate 24 that closes the hood inner side opening 26 from below. The lower plate 24 is formed to be slightly larger than the hood inner side opening 26 in plan view, and is disposed in contact with the hood inner side opening 26 from the vehicle lower side, whereby the hood inner side opening 26. Is blocked.

  The front end portion 24A of the lower plate 24 is disposed on the lower surface of the front edge of the hood inner side opening 26 in the hood inner panel 20 with a sealant 27 such as sponge interposed therebetween, and is formed in a substantially Z shape in a side view. The bolts and nuts are fastened to the hood inner panel 20 together with the lower end of the front reinforcement, not shown. Similarly, the rear end portion 24B of the lower plate 24 (in a state where the lower end flange portion of the rear wall 46B of the airbag case 46 is overlapped as will be described later) is located behind the hood inner side opening 26 in the hood inner panel 20. Sealing material 27 such as sponge is arranged on the lower surface of the edge, and is fastened to the hood inner panel 20 with bolts and nuts together with a lower end portion of a rear reinforcement (not shown) formed in a substantially Z shape in a side view. Has been. In addition, the upper end part of the front reinforcement which is not shown in figure and the upper end part of the rear side reinforcement are being fixed to the back surface of the hood outer panel 16 by fixing means, such as an adhesive agent (mastic).

  A portion of the lower plate 24 facing the hood inner side opening 26 has a shape recessed toward the vehicle lower side, and a deeply recessed front bottom 24C and a shallow recessed rear bottom 24D are formed. Then, with the front bottom portion 24C and the rear bottom portion 24D as the bottom wall portion, a metal and substantially box-shaped airbag case 46 having a front wall 46A and a rear wall 46B that are open on the upper side is attached.

  More specifically, the lower end portion of the front wall 46A of the airbag case 46 is bent at a predetermined angle toward the rear side of the hood so as to follow the inclined surface of the front bottom portion 24C of the lower plate 24, and an inflator 58 described later is fixed. The bolt 28 and the nut (not shown) are fastened together with the bracket 28 for the fastening to the inclined surface of the front bottom 24C. Further, the lower end portion of the rear wall 46B of the airbag case 46 is bent toward the rear side of the hood and overlapped with the upper surface of the rear end portion 24B of the lower plate 24. And it is spot-welded in this two-ply part. The aforementioned sealing material 27 such as sponge is interposed between the upper surface of the lower end flange portion of the rear wall 46B of the airbag case 46 and the lower surface of the rear edge of the hood inner side opening 26.

  In the airbag case 46 described above, an inflator 58 as a gas generating means formed in a substantially cylindrical shape is disposed with the vehicle width direction as a longitudinal direction, and an airbag 60 folded by a predetermined folding method is provided. Contained. The inflator 58 is disposed on the front bottom 24C of the lower plate 24, and the airbag 60 is disposed on the rear bottom 24D of the lower plate 24.

  Further, hexagonal brackets 28 are attached to the outer peripheral portion of the inflator 58 at several locations in the axial direction, and these brackets 28 are in contact with the lower end portion of the front wall 46A of the airbag case 46. The bolts and nuts (not shown) standing in the radial direction from the outer periphery of the inflator 46 are fastened together with the inclined surface of the front bottom 24C of the lower plate 24 and fixed.

  As the inflator 58, either a mechanical ignition type or an electric ignition type may be used, and either a gas generating agent enclosure type or a high pressure gas enclosure type can be applied. A plurality of gas ejection holes are formed in the circumferential direction of the inflator 58 at predetermined positions on the peripheral wall portion of the inflator 58.

  As shown in FIG. 3, the airbag 60 includes a main body portion 60 </ b> A composed of a plurality of cells and flattened along the vehicle width direction, and communicated with both sides of the main body portion 60 </ b> A and on the front pillar 66 side. And a pair of left and right extension portions 60B. In a state where the airbag 60 is inflated and deployed, the rear end portion 14A and the cowl 62 (and the lower end portion of the windshield glass 64) of the hood 14 are covered by the main body portion 60A, and the lower portion of the front pillar 66 is covered by the left and right extension portions 60B. Is supposed to be covered.

  On the other hand, the open side end 30 as the upper open portion of the airbag case 46, that is, the bag inflation opening 18 is closed so as to be openable by an airbag door 48 as a cover. Specifically, the bag inflating opening 18 is formed in a step shape that is stepped downward from the general surface 16A of the hood outer panel 16 to the vehicle lower side, and the airbag door 48 has a thickness that can be accommodated in the step 50. And is formed in a size. The airbag door 48 has a two-layer structure in which a resin layer 48B is provided on a metal plate 48A. A deployment hinge portion (not shown) is integrally formed at the rear end portion of the plate 48A of the airbag door 48, and is fixed to a rear reinforcement (not shown) with bolts and nuts. Therefore, the airbag door 46 is configured to be deployed toward the rear side of the hood while plastically deforming the deployment hinge portion around the fastening point of the deployment hinge portion. The airbag door 48 has a two-layer structure of metal and resin, but may be composed of only a panel made of aluminum alloy or the like.

  Next, the seal structure of the above-described vehicle hood airbag device 10 will be described in detail.

  In this embodiment, the hood inner side opening 26 is formed in the hood inner panel 20 as described above, and the airbag module 22 is inserted into the hood inner side opening 26 from the lower side of the hood and assembled. Therefore, a sealing material 27 such as a sponge is interposed between the upper surface of the front end portion 24A of the lower plate 24 and the upper surface of the lower end flange portion of the rear wall 46B of the airbag case 46 and the lower surface of the hood inner panel 20. Thus, the gap between the peripheral portion of the hood inner side opening 26 in the hood inner panel 20 and the airbag module 22 is sealed. In the case of the present embodiment, the “airbag case” according to claim 1 is constituted by two members of the airbag case 46 and the lower plate 24.

  Hereinafter, the mating portion between the front end portion 24A of the lower plate 24 and the hood inner panel 20 is referred to as “front mating portion 54A”, and the mating portion between the lower end flange portion of the rear wall 46B of the airbag case 46 and the hood inner panel 20 This is referred to as “rear-side mating portion 54B”, and when both are collectively referred to simply as “matching portion 54”.

  Further, on the lower surface of the rear bottom portion 24D of the lower plate 24, the front end portion of a resin cowl louver 52 extending along the vehicle width direction between the rear end portion 14A of the hood 14 and the lower end portion of the windshield glass 64 is provided. Is arranged.

  Specifically, the cowl louver 52 is disposed below the rear end of the hood inner panel 20 and tilts toward the vehicle front upper side at a gentle inclination angle, and the vehicle front upper side at a steep angle from the front end of the base 52A. And an inclined portion 52B that is inclined (rises) and a sealing material holding portion 52C that extends from the upper end of the inclined portion 52B to the front side of the vehicle along the rear bottom portion 24D of the lower plate 24. Has been. A sealing material 56 made of an elastic material such as rubber is attached to the sealing material holding portion 52C, and is elastically pressed against the lower surface of the hood inner panel 20. Thereby, the seal line S between the cowl louver 52 and the lower surface of the hood inner panel 20 is established.

  Here, the hood 14 is usually disposed as an inclined surface that is inclined forward by a predetermined angle from the rear end to the front end. When viewed from the bottom surface 20A of the hood inner panel 20 at this time (the bottom surface reference line is indicated by a one-dot chain line P), the front mating portion 54A is set at a higher position than the rear mating portion 54B. In this respect, there is a feature of the present embodiment. More specifically, the height of the front mating portion 54A is the height of a drain outlet (not shown) at both ends in the longitudinal direction of the bowl-shaped cowl 62 extending along the vehicle width direction toward the lower end of the windshield glass 64. Is set higher than Q.

  On the other hand, as described above, the hood outer panel 16 has a bag bulging opening 18 formed therein. The bag inflation opening 18 is closed by an airbag door 48 so as to be openable. The airbag door 48 is assembled from above the bag inflation opening 18. For this reason, a sealing material 68 such as a sponge is also interposed between the peripheral edge portion of the airbag door 48 and the bag inflation opening 18, whereby the hood inner side opening 26 in the hood outer panel 16 The front mating portion 70A and the rear mating portion 70B with the airbag door 48 are sealed.

  Furthermore, in the present embodiment, the length L1 in the hood front-rear direction of the bag inflation opening 18 is set to be longer than the length L2 of the open side end 30 in the airbag case 46 in the hood front-rear direction. Accordingly, the front wall 46 </ b> A and the rear wall 46 </ b> B of the airbag case 46 are housed inside the bag inflation opening 18. Note that the upper end portions of the front wall 46A and the rear wall 46B are bent inwardly of the airbag case 46 to have a throttle shape.

(Action / Effect)
Next, the operation and effect of this embodiment will be described.

  When the vehicle 12 collides with a colliding body such as a pedestrian, the inflator 58 is activated and gas is ejected from the plurality of gas ejection holes. For this reason, the airbag 60 stored in the airbag case 46 in a folded state is inflated to press the airbag door 48 from the lower surface side. When the bag inflation pressure acting on the airbag door 48 reaches a predetermined value, the airbag door 48 is deployed to the hood outward side (windshield glass 64 side) with the deployment hinge portion as the center. As a result, the bag inflation opening 18 formed on the rear end side of the hood is opened, and as shown in FIG. 3, the airbag 60 is inflated and deployed so as to be substantially U-shaped in plan view of the vehicle. The As a result, a collision body such as a pedestrian is received from the upper side of the hood by the main body 60A or the extension 60B of the inflated airbag 60, so that the collision energy at the time of the frontal collision is absorbed and the collision of the pedestrian or the like. The reaction force that the body receives from the body can be lowered.

  Here, in the present embodiment, the airbag module 22 is inserted into the hood inner side opening 26 formed in the hood inner panel 20 from the lower side of the hood inner panel 20, and is formed on the peripheral edge of the hood inner opening 26. Since the fixed structure is adopted, if water enters the hood inner panel 20, the water leaks out from the mating portion 54 of the airbag case 46 and the lower plate 24 with the hood inner panel 20, and the hood inner panel 20. There is a concern that it will fall into the engine room 13. In particular, since the hood 14 is inclined at a predetermined angle from the rear end to the front end, there is a concern about water leakage at the front side matching portion 54A closer to the engine room 13. Even if water leaks from the rear mating portion 54B to the lower side of the hood inner panel 20, it is received by the cowl louver 52, flows into the cowl inner panel (not shown), and is drained from both sides of the cowl inner panel to the outside of the vehicle. Therefore, there is no worry that water falls into the engine room 13.

  However, in the present embodiment, when viewed from the bottom reference line P of the hood inner panel 20, the height of the front matching portion 54A is set higher than the height of the rear matching portion 54B. It is hard to go around with water. Therefore, there is no fear that water will fall into the engine room 13. As a result, according to the present embodiment, water can be effectively prevented from entering the engine room 13 from around the airbag module 22.

  In particular, in the present embodiment, the height of the front mating portion 54A is set not only to the bottom reference line P of the hood inner panel 20 but also to the height Q of the drain port (not shown) of the cowl inner panel. Even in a situation where water overflows from the cowl inner panel, it is possible to prevent water leakage from the front mating portion 54A.

  Further, in the present embodiment, the length L1 in the hood front-rear direction of the bag bulging opening 18 formed in the hood outer panel 16 is larger than the length L2 of the open side end 30 in the airbag case 46 in the hood front-rear direction. Since the length is set to be long, the water that has entered from the mating portion 70 between the airbag door 48 and the bag inflation opening 18 does not enter the airbag case 46 but falls onto the hood inner panel 20. Here, in the present embodiment, when viewed from the bottom reference line P of the hood inner panel 20, the height of the front mating portion 54A is set higher than the height of the rear mating portion 54B. There is a very low possibility that water that has fallen on 20 leaks from the mating portion 54A of the airbag case 46 and the hood inner side opening 26. Even if water leaks from the rear mating portion 54B, it does not exceed the seal line S with the hood inner panel 20 in the cowl louver 52 and is drained from the cowl inner panel to the outside in the same manner as described above. .

  In summary, the joint portion 70 between the airbag door 48 and the bag inflation opening 18 is sealed by the sealing material 68, but the bag inflation opening 18 is a large opening that is long in the vehicle width direction. The sealing material 68 is not necessarily disposed all around the mating portion 70. For this reason, it is conceivable that water such as rainwater enters from the mating portion 70, but the front / rear length L 1 of the bag inflation opening 18 is larger than the front / rear length L 2 of the open side end 30 of the airbag case 46. Therefore, even if water enters from the mating portion 70, the water does not fall into the airbag case 46, but falls outside the airbag case 46. This water flows and accumulates toward the lower plate 24 that closes the hood inner side opening 26 of the hood inner panel 20, but the front side mating portion 54A is set at a higher position than the rear side mating portion 54B. Water does not try to leak from the mating portion 54A, and even in the unlikely event it tries to leak from the rear mating portion 54B. Even if water leaks out from the rear mating portion 54B, it falls on the down cowl louver 52 that extends below the hood inner panel 20 and guides water to the cowl inner panel (not shown). It is drained inside. From the above, it is possible to effectively prevent water from entering the engine room 13.

  In the present embodiment, the cowl louver 52 includes the base portion 52A, the inclined portion 52B, and the sealing material holding portion 52C. However, the steeply inclined portion 52B is set before the final seal line S. Thus, the following effects can be obtained. That is, normally, water during rain flows down through the windshield glass 64 into the cowl inner panel and is drained from both ends in the longitudinal direction of the cowl inner panel to the outside of the vehicle. In some cases, it may not catch up, and in this case, water may flow into the cowl louver 52 side. However, the cowl louver 52 is provided with a steeply inclined portion 52B in front of the seal line S, so that the momentum of the water that flows backward is blocked by the inclined portion 52B. In other words, the inclined portion 52B has an effect of preventing the water flowing backward through the cowl louver 52 from striking the sealing material 56 with vigor.

  In addition, since the engine parts arranged in the engine room 13 are arranged close to the lower side of the lower plate 24, the cowl louver 52 is extended in a narrow gap between the lower plate 24 and the engine parts itself. Is difficult and usually not done. That is, normally, the position of the seal line S of the cowl louver 52 is set on the lower surface of the rear bottom 24D of the lower plate 24. Under such circumstances, the ingenuity of this waterproof structure is to make the height of the front side mating portion 54A higher than the height of the rear side mating portion 54B. As a result, the position of the seal line S of the cowl louver 52 can be made the same as before, and it is not necessary to change the design.

  Further, the lower plate 24 constituting the bottom wall portion of the airbag case 46 of this embodiment includes a deep bottom front bottom portion 24C and a shallow bottom rear bottom portion 24D, which is considerably lower than the hood inner side opening portion 26. Although it is lowered to the position, this point also has an effect of suppressing water from reaching the front side matching portion 54A.

[Supplementary explanation of this embodiment]
In the present embodiment described above, when the airbag 60 is inflated and deployed, it covers not only the rear end portion 14A and the cowl 62 of the hood 14 but also the lower portions of the left and right front pillars 66 (the lower end portion of the windshield glass 64). However, it is only necessary to cover at least the rear end portion 14A of the hood 14 (the rear end portion 16A of the hood outer panel 16) and the cowl 62.

It is the longitudinal cross-sectional view (1-1 line expanded sectional view of FIG. 2) which looked at the state which cut | disconnected the hood airbag apparatus for vehicles which concerns on this embodiment along the vehicle front-back direction. It is an external appearance perspective view of the vehicle which shows the non-operation state of the hood airbag apparatus for vehicles shown by FIG. FIG. 3 is an external perspective view of a vehicle showing an operating state of the vehicle hood airbag device shown in FIG. 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle hood airbag apparatus 12 Vehicle 13 Engine room 14 Hood 14A Rear end part 16 Hood outer panel 18 Bag expansion opening 20 Hood inner panel 22 Air bag module 24 Lower plate (air bag case)
24D rear bottom 26 hood inner side opening (assembly opening)
27 Sealing material 30 Open side end (upper side open part)
46 Airbag Case
46A front wall
46B rear wall 48 air bag door (cover)
52 Cowl Louva
52C sealing material holding portion 54A front side matching portion 54B rear side matching portion 56 sealing material 58 inflator (gas generating means)
60 Airbag 64 Windshield glass P Bottom reference line
S seal line L1 length in the hood front-rear direction at the bag inflation opening L2 length in the hood front-rear direction of the open end of the airbag case

Claims (2)

Gas generating means for injecting gas at the time of a frontal collision with a collision body, and a bag bulging opening formed in the hood outer panel by expanding in response to supply of gas stored in a folded state and generated by the gas generating means An assembly in which an airbag module including an airbag that is inflated and deployed on a hood by deploying a cover, and an airbag case that accommodates the gas generation means and the airbag is formed on the hood inner panel A seal structure applied to a vehicle hood airbag device that is inserted into the opening for the vehicle from the lower side of the hood inner panel and fixed to the periphery of the opening for assembly,
The cover is assembled from the upper side of the bag bulge opening, and a seal member that is held by the cowl louver to form a seal line is elastically pressed against the lower surface of the rear bottom portion of the airbag case. The front and rear walls of the bag case are inserted between the hood inner panel and the hood outer panel through the hood inner panel assembly opening, and the upper ends of the front and rear walls are arranged close to the cover. And
And , when viewed from the bottom reference of the hood inner panel, the front side matching part of the hood inner panel and the airbag case is set at a position higher than the rear side matching part of the hood inner panel and the airbag case.
A seal structure for a vehicle hood airbag device. Food longitudinal length of the bag-expansion opening, the to be set longer than the length of the hood front-rear direction of the upper opening of the airbag case, the front and rear walls of the airbag case It is housed inside the bag bulge opening and has a throttle shape in which the upper end of the front wall and the rear wall are bent inward of the airbag case.
The seal structure for a vehicle hood airbag device according to claim 1.

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