WO2015146361A1

WO2015146361A1 - Curtain air bag system

Info

Publication number: WO2015146361A1
Application number: PCT/JP2015/054117
Authority: WO
Inventors: 哲也荻野
Original assignee: オートリブディベロップメントエービー; 哲也荻野
Priority date: 2014-03-28
Filing date: 2015-02-16
Publication date: 2015-10-01
Also published as: JPWO2015146361A1; JP6185653B2

Abstract

[Problem] To provide a curtain air bag system that not only does not hinder the deployment action when a cushion part is expandably deployed, but can also maintain occupant-protective performance when the head of an occupant collides. [Solution] A curtain air bag system (100) is provided with a cushion part (102) installed in an upper part of a body side wall and stored in a long, thin form, and a cover member (140) attached to the cushion part, the cover member being provided with: an outer side wall part (146) positioned on the vehicular outer side of the stored cushion part; a lower side wall part (148) inclined downward toward the vehicular inner side from near the lower end of the outer side wall part, the lower side wall part being positioned on a side below the cushion part; a first vertical wall part (150) extending downward from near the vehicular-inner-side end of the lower side wall part and facing a pillar garnish (144) for covering the vehicular inner side of the body side wall, the first vertical wall part facing the pillar garnish from the vehicular outer side thereof; and a rib (152) provided on the side of the outer side wall part and the lower side wall part opposite the side where the cushion part is installed, and the cover member having a cavity part (154) between the first vertical wall part and the rib below the lower side wall part.

Description

Curtain airbag device

The present invention includes a cushion part that inflates and expands along a side part in a vehicle compartment for the purpose of protecting an occupant at the time of a side collision or rollover (rollover) of a vehicle, and a cover member attached to the cushion part. The present invention relates to a curtain airbag device.

Modern vehicles are almost equipped with airbags as standard. An airbag is a safety device that operates in an emergency such as a vehicle collision, and inflates and deploys with gas pressure to receive and protect an occupant. There are various types of airbags depending on the installation location and application. For example, a front airbag is provided in the center of the steering wheel in order to protect the driver from collisions in the front-rear direction. In addition, a curtain airbag device having a cushion portion that inflates and deploys along the side window is provided in the vicinity of the ceiling of the side wall of the vehicle body in order to protect an occupant from a side collision and subsequent rollover (rollover). .

The cushion portion of the curtain airbag device has a large shape that covers a side window or the like of the side wall of the vehicle body, and is mounted on the upper side of the vehicle body side wall in a slender storage form that is wound or folded from below.

Patent Document 1 describes a curtain airbag device provided with a cover member that is attached to a part of a cushion portion and accommodates the folded cushion portion. The cover member includes a connection wall that connects a pair of opposing walls, a load transmission portion provided on the connection wall, and a locking portion that is disposed on the vehicle exterior side of the load transmission portion.

In Patent Document 1, when an operator presses the load transmission portion from the vehicle inner side toward the vehicle outer side (roof side rail side), the pressing load is efficiently transmitted to the locking portion via the load transmission portion, and the curtain airbag The device can be easily assembled to the roof side rail.

JP 2009-90703 A

The cover member not only holds the cushion portion in the storage form during normal times, but also has a role that enables the cushion portion to smoothly expand and deploy in an emergency. The cushion portion can be deployed in a target direction by obtaining a reaction force from the cover member during inflated deployment.

However, the cover member may be deformed by receiving a force from the cushion part during expansion and deployment. If the cover member is deformed, the cushion part is hung on a member on the side wall of the vehicle body at the time of inflating and deploying, so that the unfolding behavior is hindered and the cushion part may be unfolded in a direction other than the target direction. For this reason, the cover member is required to have rigidity in order to suppress deformation at the time of expansion and deployment of the cushion portion.

On the other hand, when an occupant's head collides with the inflated cushion portion, the impact is transmitted to the cover member via the cushion portion. If the cover member has high rigidity and does not deform at all even under impact, the occupant's head receives a large reaction force from the cover member via the cushion portion or the like. For this reason, there exists a possibility that the passenger | crew protection performance of a curtain airbag apparatus may fall.

That is, in the curtain airbag device, it is difficult to maintain the occupant protection performance simply by increasing the rigidity of the cover member so as not to hinder the deployment behavior of the cushion portion. Patent Document 1 only describes a configuration in which a curtain airbag device is easily assembled to a roof side rail, and achieves both the purpose of not hindering the deployment behavior of the cushion portion and the purpose of maintaining occupant protection performance. I can't let you.

In view of the above problems, the present invention provides a curtain airbag device that not only inhibits the deployment behavior of the cushion portion during inflation and deployment, but also maintains the occupant protection performance when the occupant's head collides. The purpose is that.

In order to solve the above-described problems, a typical configuration of a curtain airbag device according to the present invention is configured in a bag shape and is wound or folded so as to have an elongated storage form and is mounted on an upper portion of a vehicle body side wall. A curtain airbag device including a cushion part and a cover member attached to the cushion part, the cover member being located on the vehicle outer side of the cushion part in the storage form, and extending outside in the vehicle vertical direction A lower side wall portion that is inclined and extends downward from the lower end of the wall portion toward the lower side of the vehicle interior, and extends downward from the vicinity of the end portion of the lower side wall portion on the inner side of the vehicle, A first vertical wall portion facing the interior material on the vehicle exterior side of the interior material covering the vehicle interior of the side wall; and a rib provided on the opposite side to the side where the cushion portion is installed with respect to the outer wall portion and the lower wall portion; With the lower side In the lower parts, characterized by having a gap portion between the first vertical wall portion and the rib.

In the above, the lower side wall portion of the cover member receives force from the cushion portion during expansion and deployment. If the lower side wall portion is deformed by receiving a force from the cushion portion, the cushion portion may be caught between the side wall of the vehicle body and the interior material, and may expand in a direction other than the target direction. For this reason, the lower side wall portion of the cover member is required to have rigidity in order to suppress deformation at the time of expansion and deployment of the cushion portion.

On the other hand, when the occupant's head collides with the inflated cushion part, the impact is transmitted to the interior material through the cushion part. The interior material is deformed to the outside of the vehicle and presses the lower side wall portion of the cover member. If the lower wall portion pressed against the interior material is not deformed at all, the occupant's head receives a large reaction force from the lower wall portion via the interior material and the cushion portion.

Therefore, in the above configuration, ribs are formed on the side opposite to the side where the cushion portion is installed with respect to the outer wall portion and the lower wall portion of the cover member. For this reason, the rigidity of the outer side wall part and lower side wall part of a cover member is ensured, and the deformation | transformation at the time of expansion | deployment deployment of a cushion part can be suppressed. Thereby, it can avoid that the expansion | deployment behavior of a cushion part is inhibited.

Furthermore, in the above configuration, there is a gap between the first vertical wall and the rib below the lower wall of the cover member. For this reason, when a passenger | crew's head collides with a cushion part, the 1st vertical wall part pressed by the interior material can change to the vehicle outer side using the space | gap part in which a rib is not formed. As described above, the first vertical wall portion of the lower wall portion is deformed, so that it is possible to absorb an impact when the head of the occupant collides, the occupant's head does not receive a large reaction force, and the occupant protection performance is impaired. I can't. Therefore, according to the said structure, not only does the unfolding behavior at the time of expansion | swelling and deployment of a cushion part be inhibited, but the passenger | crew protection performance when a passenger | crew's head collides can also be maintained.

The above ribs may be erected from the vehicle outer side of the gap portion to the vehicle outer side of the outer wall portion. Thus, the rib is not formed in the gap.

The above-mentioned gap portion may be constituted by a non-connection region where the first vertical wall portion and the rib are not connected, or may be a predetermined region extending from the first vertical wall portion to the vehicle outer side. As described above, the gap portion is located between the first wall portion and the rib and is a region where no rib is formed.

The above cover member may further include a second vertical wall portion that extends downward from the lower side of the lower wall portion and divides the vehicle exterior side of the gap portion. Thereby, when a passenger | crew's head collides with a cushion part, the 1st vertical wall part pressed against the interior material deform | transforms into a vehicle outer side using a space | gap part, and contact | abuts to a 2nd vertical wall part. That is, the second vertical wall portion restricts deformation of the first vertical wall portion toward the vehicle outer side. Therefore, the lower side wall portion of the cover member is deformed to the vehicle outer side until the first vertical wall portion comes into contact with the second vertical wall portion, and is not further deformed, so that rigidity can be ensured. The rib does not need to be in contact with the second vertical wall portion, but as an example, the second vertical wall portion and the rib may be joined. At this time, the second vertical wall portion may partition the outer side of the gap portion by contacting the rib on the inner side of the rib.

The rib includes a lower region located on the vehicle outer side of the second vertical wall portion, and the first dimension in the vehicle width direction of the gap is smaller than the second dimension that is the length of the lower region in the vehicle width direction. Good. Thus, the lower region is located on the vehicle lower side of the lower side wall portion, and is formed longer in the vehicle width direction than the gap portion. For this reason, in the cover member, even if the gap portion is formed, the rigidity of the lower side wall portion can be secured by the lower region.

The cover member may further include a partition wall that extends from the base of the second vertical wall portion toward the vehicle outer side in the vehicle width direction and further extends downward to partition the lower region from the rib. Thereby, in the cover member, the vehicle lower side of the lower wall portion is reinforced by the partition wall in addition to the second vertical wall portion and the lower region. For this reason, in the cover member, the lower side wall portion becomes more difficult to deform when the cushion portion is inflated and deployed, and rigidity can be secured.

It is preferable that at least a part of the above rib is in contact with the side wall of the vehicle body. Accordingly, in the cover member, the outer wall portion is hardly deformed to the vehicle outer side when the cushion portion is inflated and deployed, and the deformation of the lower side wall portion continuing to the outer wall portion is further suppressed. Therefore, the cover member can increase the rigidity of the lower side wall portion.

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the curtain airbag apparatus which not only does not inhibit the deployment behavior at the time of inflating and deploying the cushion portion but also can maintain the occupant protection performance when the occupant's head collides. .

It is a figure which illustrates the curtain airbag apparatus concerning embodiment of this invention. It is a figure which expands and illustrates the cover member vicinity of FIG. It is each sectional drawing of the cover member and cushion part of FIG. It is a figure which illustrates the state which the passenger | crew's head collided with the cushion part after further expansion | deployment from the state of FIG.3 (b). It is a figure which expands and illustrates the cover member vicinity of the airbag of a comparative example. It is each sectional drawing of the cover member and cushion part of FIG.

DESCRIPTION OF SYMBOLS 100 ... Air bag, 102 ... Cushion part, 102A ... A part of cushion part, 104 ... Roof side rail, 106 ... Vehicle, 108 ... Roof trim, 110 ... Inflator, 112 ... Side window, 114 ... Front seat, 116, 118, 122 ... Chamber, 120 ... Rear seat, 124 ... Upper edge, 126 ... Mounting tab, 128 ... Strap, 130 ... Front pillar, 132 ... Center pillar, 140 ... Cover member, 142a, 142b ... Hole, 144 ... Pillar Garnish, 146 ... outer wall portion, 148 ... lower wall portion, 150 ... first vertical wall portion, 152 ... rib, 154 ... gap portion, 156 ... lower region, 158 ... part of rib, 160 ... second vertical wall portion 164 ... partition wall, 166 ... root, 168 ... occupant, 170 ... head

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiment are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

FIG. 1 is a diagram illustrating a curtain airbag device (hereinafter, airbag 100) according to an embodiment of the present invention. FIGS. 1A and 1B are views of the interior of a vehicle as viewed from the inside of the vehicle in the vehicle width direction, illustrating the storage configuration of the cushion portion 102 of the airbag 100 and the state when inflated and deployed, respectively. .

The cushion part 102 is a part that inflates and deploys to protect the occupant in an emergency. As illustrated in FIG. 1A, the cushion portion 102 is wound around in a normal state and has a long and narrow roll-shaped storage configuration in the front and rear of the vehicle, and is attached to the upper portion of the vehicle body side wall (the roof side rail 104). 106. The roof side rail 104 is usually covered with a roof trim 108 (see FIG. 3). For this reason, the mounted cushion part 102 is invisible from the vehicle compartment. The storage form of the cushion part 102 can also be realized by folding.

The upper part of the cushion part 102 is provided with, for example, a cylinder type (cylinder type) inflator 110 which is a gas generator. The cushion part 102 expand | swells by the pressure of the gas supplied from the inflator 110, and restrains a passenger | crew as illustrated in FIG.1 (b). Inflators that are currently popular are types that are filled with a gas generating agent and burn it to generate gas, types that are filled with compressed gas and supply gas without generating heat, and There are types including both a gas generating agent and a compressed gas. Any type of inflator 110 can be used.

In the state illustrated in FIG. 1A, when a side collision or rollover (rollover) occurs in the vehicle 106, first, a sensor (not shown) provided in the vehicle 106 senses an impact, resulting in this. Thus, a signal is transmitted to the inflator 110. In response to this signal, the inflator 110 operates and gas is supplied to the cushion portion 102. When gas is supplied from the inflator 110, the cushion portion 102 is directed downward along the side wall of the passenger compartment (such as the side window 112 in FIG. 1A) as illustrated in FIG. 1B. Inflate and deploy to protect passengers.

The cushion portion 102 has a large shape that can be expanded along the side surface of the passenger compartment as a curtain airbag. The cushion portion 102 is formed in a bag shape by overlapping two base fabrics constituting the surface thereof, sewing and bonding, or spinning using OPW (One-Piece Woven).

The expansion region of the cushion portion 102 is partitioned into a plurality of small rooms (chambers) in consideration of the position where the occupant can come into contact. For example,

chambers

116 and 118 are provided on the front side of the vehicle for the purpose of receiving the occupant of the front seat 114. Further, a chamber 122 and the like are provided on the side of the rear seat 120 on the rear side of the vehicle.

A plurality of attachment tabs 126 as attachment portions to the vehicle 106 are provided on the upper edge 124 of the cushion portion 102. The attachment tab 126 has a belt shape and is attached to the roof side rail 104 using a bolt or the like. For example, a string-like strap 128 is provided at the front end of the cushion portion 102. The strap 128 is a member that connects the cushion portion 102 to the front pillar 130, suppresses the swinging of the cushion portion 102 during expansion and deployment, stabilizes the deployment behavior, and gives the cushion portion 102 tension in the vehicle longitudinal direction. .

As illustrated in FIG. 1A, the airbag 100 includes a cover member 140 attached in the vicinity of the center pillar 132 (see FIG. 3) in the cushion portion 102. The cover member 140 is fixed to the roof side rail 104 at the top of the center pillar 132 using a bolt (not shown) inserted through the

holes

142a and 142b (see FIG. 2).

FIG. 2 is an enlarged view illustrating the vicinity of the cover member 140 of FIG. FIG. 2A is a view of the cover member 140 holding the cushion portion 102 in the storage form as seen from the vehicle outer side in the vehicle width direction. FIG. 2B is a view as seen from an arrow A in FIG. FIG. 3 is a cross-sectional view of the cover member 140 and the cushion portion 102 of FIG. 2, and illustrates the roof trim 108, the center pillar 132, and the pillar garnish 144. FIG. 3A is a cross-sectional view taken along the line BB in FIG. FIG. 3B is a cross-sectional view illustrating a state in which the cushion portion 102 of FIG.

The cover member 140 is made of resin, and has a long shape along the storage-type cushion portion 102 as illustrated in FIGS. 2A and 2B, and the storage-type cushion portion 140 102 covers, for example, the vehicle body side wall (the vehicle outer side) and the vehicle lower side. Moreover, the vehicle inner side of the cushion part 102 is covered with the roof trim 108 so that it may illustrate in Fig.3 (a). A pillar garnish 144 is disposed below the roof trim 108. The pillar garnish 144 is an interior material that covers the inside of the vehicle body side wall, and an upper end 144a of the pillar garnish 144 is in contact with the lower end 108a of the roof trim 108 from the inside of the vehicle.

The cover member 140 includes an outer wall portion 146, a lower wall portion 148, a first vertical wall portion 150, and a rib 152, as illustrated in FIG. The outer side wall part 146 is located on the vehicle outer side of the cushion part 102 in the storage form, and extends in the vehicle vertical direction. The lower wall portion 148 extends from the vicinity of the lower end 146a of the outer wall portion 146 in an inclined manner toward the lower inside of the vehicle, and is positioned below the cushion portion 102. The first vertical wall portion 150 extends downward from the vicinity of the end portion 148a on the vehicle inner side of the lower wall portion 148. The first vertical wall portion 150 faces the pillar garnish 144 on the outside of the pillar garnish 144 with the lower end 108a of the roof trim 108 interposed therebetween.

The ribs 152 are opposite to the outer wall portion 146 and the lower wall portion 148 on the opposite side where the stored cushion portion 102 is installed, that is, on the vehicle outer side of the outer wall portion 146 and the vehicle lower side of the lower wall portion 148. Is provided. Further, the cover member 140 has a gap portion 154 between the first vertical wall portion 150 and the rib 152 below the lower wall portion 148.

The gap portion 154 is a predetermined region extending from the first vertical wall portion 150 to the vehicle outer side, and is located between the first wall portion 150 and the rib 152 and is a region where the rib 152 is not formed. Or the space | gap part 154 is comprised by the non-connecting area | region where the 1st vertical wall part 150 and the rib 152 are not connected.

The rib 152 is erected from the vehicle outer side of the gap portion 154, which is a predetermined region extending from the first vertical wall portion 150 to the vehicle outer side, on the vehicle lower side of the lower wall portion 148, from the vehicle outer side of the outer wall portion 146. Yes. That is, as illustrated in FIG. 3A, the rib 152 has a first dimension L <b> 1 indicating the length in the vehicle width direction from the first vertical wall 150 to the outside of the vehicle below the lower wall 148. The gap 154 is not formed. Further, the rib 152 includes a lower region 156 located on the vehicle outer side of the gap portion 154. Furthermore, at least a part 158 of the rib 152 that is erected on the vehicle outer side from the outer wall portion 146 is in contact with the body panel (the side wall of the vehicle body).

The cover member 140 includes a second vertical wall portion 160 and a partition wall 164. The second vertical wall portion 160 extends downward from the lower side wall portion 148 and is formed at a position separating the gap portion 154 from the first vertical wall portion 150. The second vertical wall portion 160 is in contact with the lower region 156 on the inner side of the lower region 156, thereby defining the outer side of the gap portion 154. That is, the lower region 156 is located on the vehicle exterior side of the gap portion 154 and the second vertical wall portion 160. The partition wall 164 extends from the base 166 of the second vertical wall portion 160 toward the vehicle outer side in the vehicle width direction, and further extends downward to partition the lower region 156 from the rib 152.

In the lower region 156, the length in the vehicle width direction is indicated by the second dimension L2. The first dimension L1 is the length in the vehicle width direction of the gap portion 154, that is, the length in the vehicle width direction of the interval between the first vertical wall portion 150 and the second vertical wall portion 160. As illustrated in FIG. 3A, in the cover member 140, the first dimension L1 is smaller than the second dimension L2.

Here, as illustrated in FIG. 3A, the cover member 140 not only holds the cushion portion 102 in the storage form in a normal state, but also has a role to enable the cushion portion 102 to smoothly expand and deploy in an emergency. Have. In an emergency illustrated in FIG. 3B, the cushion portion 102 inflates and expands in the passenger compartment space over the upper end 144a of the pillar garnish 144 while pushing the roof trim 108 away. At this time, the lower wall portion 148 of the cover member 140 receives a force from the cushion portion 102 that expands and deploys.

If the lower wall portion 148 is deformed by receiving a force from the cushion portion 102, the cushion portion 102 is caught, for example, between the center pillar 132 and the pillar garnish 144 (see FIG. 6B). There is a risk of deployment in directions other than the intended direction. Therefore, the lower side wall portion 148 of the cover member 140 is required to have rigidity in order to suppress deformation of the cushion portion 102 during expansion and deployment.

In the present embodiment, the rib 152 is formed on the opposite side of the cover member 140 where the cushioned portion 102 is placed with respect to the outer wall portion 146 and the lower wall portion 148. In particular, a rib 152 including a lower region 156 is formed on the lower side wall portion 148. For this reason, in the cover member 140, the rigidity of the outer side wall part 146 and the lower side wall part 148 is ensured, and the deformation | transformation at the time of expansion | deployment deployment of the cushion part 102 is suppressed. Therefore, the cushion portion 102 can be smoothly deployed in the target direction without hindering the deployment behavior.

FIG. 4 is a diagram illustrating a state in which the head 170 of the occupant 168 collides with the cushion portion 102 after inflated and deployed from the state of FIG. When the head 170 of the occupant 168 collides with the inflated and deployed cushion portion 102, the impact is transmitted to the pillar garnish 144 via the cushion portion 102. The pillar garnish 144 subjected to the impact is deformed to the outside of the vehicle and presses the lower side wall portion 148 of the cover member 140.

If the lower wall portion 148 pressed against the pillar garnish 144 does not deform at all, the head 170 of the occupant 168 receives a large reaction force from the lower wall portion 148 via the pillar garnish 144 and the cushion portion 102. In other words, the cover member 140 can avoid the poor deployment of the cushion portion 102 only by securing the rigidity of the lower side wall portion 148, but cannot absorb the impact when the head 170 of the occupant 168 collides, and occupant protection performance. Will be damaged.

Therefore, in the present embodiment, as described above, the rib 152 is not formed from the first vertical wall portion 150 to a predetermined region outside the vehicle, and the gap is formed between the first vertical wall portion 150 and the lower region 156 of the rib 152. A configuration forming part 154 was adopted.

Therefore, when the head 170 of the occupant 168 collides with the cushion portion 102, the first vertical wall portion 150 is first pressed against the pillar garnish 144. Next, the first vertical wall portion 150 can be deformed to the vehicle outer side using the gap portion 154 until it abuts on the second vertical wall portion 160 in contact with the lower region 156 on the vehicle inner side of the lower region 156. The first vertical wall 150 can be deformed by the following modifications, as illustrated by the phantom line in FIG. 3B and the solid line in FIG. That is, the range from the root 166 of the second vertical wall portion 160 to the end portion 148a on the vehicle inner side of the lower wall portion 148 is made possible by displacing counterclockwise from the root 166 toward the vehicle outer side.

Thus, the first vertical wall portion 150 of the lower wall portion 148 can absorb the impact by being deformed to the vehicle outer side when the head 170 of the occupant 168 collides with the cushion portion 102. For this reason, the head 170 of the occupant 168 does not receive a large reaction force, and the occupant protection performance is not impaired. That is, the cover member 140 enables the first vertical wall portion 150 to be deformed to the vehicle outer side while ensuring the rigidity of the lower wall portion 148.

FIG. 5 is an enlarged view illustrating the vicinity of the cover member 140A of the airbag 200 of the comparative example. FIG. 5A is a view of the cover member 140A holding the cushion portion 102 in the storage form as viewed from the vehicle outer side in the vehicle width direction. FIG.5 (b) is a C arrow directional view of Fig.5 (a). 6 is a cross-sectional view of the cover member 140A and the cushion portion 102 of FIG. FIG. 6A is a DD cross-sectional view of FIG. FIG. 6B is a cross-sectional view illustrating a state where the cushion portion 102 of FIG. 6A is inflated and deployed in an emergency.

As illustrated in FIG. 6A, the airbag 200 of the comparative example includes an outer wall portion 202 positioned on the vehicle outer side of the cushion portion 102 in a stored state, and a lower side wall portion 204 positioned on the lower side of the cushion portion 102. And a vertical wall portion 206 and a wall portion 208. The airbag 200 is different from the airbag 100 in that a rib 210 is erected on the vehicle outer side of the outer wall portion 202, but no rib is formed on the vehicle lower side of the lower wall portion 204.

The lower wall portion 204 extends from the lower end 202a of the outer wall portion 202 in an inclined manner downward on the vehicle inner side. The vertical wall portion 206 extends downward from an end portion 204 a on the vehicle inner side of the lower wall portion 204. The vertical wall portion 206 faces the pillar garnish 144 on the outside of the pillar garnish 144 with the lower end 108a of the roof trim 108 interposed therebetween. The wall 208 divides the outer wall 202 and the lower wall 204 and extends from the lower end 202a of the outer wall 202 toward the vehicle exterior. The end 208 a of the wall 208 on the vehicle exterior side is in contact with the center pillar 132 together with the rib 210.

For this reason, in the airbag 200, it is possible to prevent the outer wall portion 202 of the cover member 140A from being deformed to the vehicle outer side when the cushion portion 102 is inflated and deployed. However, the lower side wall portion 204 of the cover member 140A has no rib formed on the lower side of the vehicle, and thus cannot secure rigidity. For this reason, when receiving a force from the inflating and deploying cushion portion 102, the lower wall portion 204 is a vertical wall starting from the lower end 202a of the outer wall portion 202 as illustrated by the phantom line and the arrow E in FIG. Together with the portion 206, it is displaced counterclockwise toward the vehicle exterior.

Therefore, in the cover member 140A, as illustrated in FIG. 6B, when the lower wall portion 204 and the vertical wall portion 206 receive a force from the cushion portion 102 that expands and deploys in an emergency, the cover member 140A is deformed as indicated by a solid line in the drawing. To do. For this reason, for example, a gap 212 is generated between the center pillar 132 and the pillar garnish 144, more specifically between the vertical wall portion 206 and the pillar garnish 144.

Therefore, in the airbag 200 of the comparative example, as illustrated in FIG. 6B, a part 102A of the cushion portion 102 may be caught in the gap 212 at the time of inflation and deployment, and the deployment behavior may be hindered and deployed in a direction other than the target direction. is there.

On the other hand, according to the airbag 100 in the present embodiment, the first vertical wall portion 150 can be deformed to the vehicle outer side while the rigidity of the lower wall portion 148 of the cover member 140 is ensured. The deployment behavior of the portion 102 is not hindered, and further, the passenger protection performance can be maintained.

Further, the lower wall portion 148 of the cover member 140 is deformed to the vehicle exterior until the first vertical wall portion 150 comes into contact with the second vertical wall portion 160 and is not further deformed, so that rigidity can be ensured. Since the first dimension L1 that is the length of the gap 154 in the vehicle width direction is smaller than the second dimension L2 that is the length of the lower area 156 in the vehicle width direction, the lower area 156 is wider than the gap 154 in the vehicle width. It is long in the direction. For this reason, the cover member 140 can ensure the rigidity of the lower wall portion 148 even if the gap portion 154 is formed.

A part 158 of the rib 152 is in contact with the body panel. For this reason, in the cover member 140, the outer wall portion 146 is hardly deformed to the vehicle outer side when the cushion portion 102 is inflated and deployed, and the deformation of the lower wall portion 148 continuous with the outer wall portion 146 is further suppressed.

Further, in the cover member 140, the vehicle lower side of the lower wall portion 148 is reinforced by the partition wall 164 in addition to the second vertical wall portion 160 and the lower region 156. For this reason, in the cover member 140, the lower side wall part 148 becomes more difficult to deform when the cushion part 102 is inflated and deployed, and rigidity can be ensured even if the gap part 154 is formed.

The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the embodiments described above are preferred examples of the present invention, and other embodiments can be implemented or performed in various ways. Can be carried out. The invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise specified in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless otherwise specified.

Therefore, it is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the claims, which naturally belong to the technical scope of the present invention. It is understood.

Moreover, in the said embodiment, although demonstrated supposing the case where the airbag 100 concerning this invention is applied to a motor vehicle, it is also possible to apply to an aircraft, a ship, etc. besides a motor vehicle, and the same effect is obtained. Obtainable.

The present invention includes a cushion part that inflates and expands along a side part in a vehicle compartment for the purpose of protecting an occupant at the time of a side collision or rollover (rollover) of a vehicle, and a cover member attached to the cushion part. It can be used for a curtain airbag device.

Claims

A curtain airbag device comprising a cushion portion that is configured in a bag shape and is wound or folded into a slender storage form and mounted on an upper portion of a vehicle body side wall, and a cover member attached to the cushion portion. ,
The cover member is
An outer wall portion located on the vehicle outer side of the cushion portion of the storage form and extending in the vehicle vertical direction;
A lower side wall portion that extends obliquely downward from the vicinity of the lower end of the outer wall portion and is located on the lower side of the cushion portion; and
A first vertical wall portion that extends downward from the vicinity of the vehicle inner side end portion of the lower side wall portion and faces the interior material on the vehicle exterior side of the interior material that covers the vehicle interior side of the vehicle body side wall;
A rib provided on the side opposite to the side where the cushion part is installed, with respect to the outer wall part and the lower wall part,
A curtain airbag device having a gap between the first vertical wall and the rib below the lower wall.
2. The curtain airbag device according to claim 1, wherein the rib is erected from the vehicle outer side of the gap portion to the vehicle outer side of the outer wall portion.
The curtain air bag apparatus according to claim 1 or 2, wherein the gap portion is configured by a non-connection region where the first vertical wall portion and the rib are not connected.
The curtain airbag device according to any one of claims 1 to 3, wherein the gap portion is a predetermined region extending from the first vertical wall portion to the vehicle exterior side.
The said cover member is further extended in the downward direction from the lower side of the said lower side wall part, The 2nd vertical wall part which divides the vehicle outer side of the said space | gap part is further provided, The any one of Claim 1 to 4 characterized by the above-mentioned. The curtain airbag device according to claim 1.
The curtain airbag device according to claim 5, wherein the second vertical wall portion and the rib are joined.
The rib includes a lower region located on the vehicle outer side of the second vertical wall portion,
The curtain airbag device according to claim 5 or 6, wherein a first dimension in the vehicle width direction of the gap is smaller than a second dimension that is a length in the vehicle width direction of the lower region.
The cover member further includes a partition wall extending from the base of the second vertical wall portion toward the vehicle outer side in the vehicle width direction and further extending downward to partition the lower region from the rib. The curtain airbag device according to any one of claims 5 to 7.
The curtain airbag device according to any one of claims 1 to 8, wherein at least a part of the rib is in contact with the side wall of the vehicle body.