JP2006192988A - Air bag device for coping with rolling over of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protector coping with rolling over of a vehicle, preventing a phenomenon that an occupant's body is partly moved from a back window to the outside of a vehicle in the case of rolling over in the vehicle having the back window disposed above a seat back to further improve the occupant protective performance. <P>SOLUTION: A back window curtain air bag device includes: an air bag body 20 installed on the lower side edge of the back window 4; two inflaters 21, 21 for jetting gas supplied to the air bag body 20; and communicating pipes 22, 22 for supplying the gas jetted from the inflaters 21, 21 to the air bag body 20. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rollover-compatible airbag device in a vehicle, for example, a vehicle rollover-compatible airbag device in which a back window of a sports car or the like is disposed above a seat back.

  Conventionally, in order to protect the occupant, when the vehicle rolls over, the airbag body provided on the periphery of the side window is deployed and inflated in the form of a curtain so that part of the occupant's body moves outward from the side window. 2. Description of the Related Art An airbag device for suppressing rollover is known.

  For example, in Patent Document 1 below, when a curtain-like airbag body in a housed state is installed on the pillars and side rails of the peripheral edge of the side window, when the rollover or the like is detected, the airbag body is made into a curtain shape. There has been disclosed a rollover-compatible curtain airbag device that protects an occupant by positioning an airbag main body on the side of a vehicle interior side of a side window.

  Further, a patent document 2 discloses a rear collision airbag device that deploys and inflates an airbag main body installed on a rear package tray to the front side of a vehicle in order to protect a rear seat occupant during a rear collision of the vehicle. Yes.

JP 2001-328503 A Japanese Patent Laid-Open No. 7-186870

  By the way, in a vehicle such as a sports car, for example, in order to reduce the vehicle height and reduce the air resistance during traveling, the back window at the rear of the vehicle may be disposed so as to be gently inclined in the horizontal direction. Many.

  When the back window is gently inclined in this way, the back window may be located above the seat back of the seat installed in the passenger compartment, and the occupant's head may be located below the back window.

  However, when the occupant's head is positioned below the back window in this way, when the vehicle rolls over, a part of the occupant's body may move outward from the back window.

  The above-described curtain airbag device of Patent Document 1 cannot sufficiently cope with this phenomenon because the airbag body is only provided at the peripheral edge of the side window.

  Further, in the airbag device disclosed in Patent Document 2, the airbag body is deployed and inflated on the vehicle interior side of the back wind, but there is no problem with respect to a phenomenon in which a part of the occupant's body moves outward from the back wind. It was not a countermeasure, and could not cope with this phenomenon sufficiently.

  Accordingly, the present invention provides a vehicle rollover-compatible airbag device in which a vehicle, in which a back window is disposed above a seat back, moves a part of an occupant's body from the back window toward the outside of the vehicle when the vehicle rolls over. It is an object of the present invention to provide a vehicle rollover compatible airbag device that can further improve passenger protection performance by suppressing the above.

  A vehicle rollover airbag apparatus according to the present invention is a vehicle rollover airbag apparatus in which a back window is disposed at least above a seatback in a standing state of a seat disposed in a vehicle interior. A rollover judging means for detecting or predicting a rollover of the vehicle, and a rollover judging means for determining a rollover in the retracted state near the lower side edge of the back window. An airbag main body that develops and inflates in a curtain shape to generate tension is provided.

  According to the above configuration, when a rollover is determined by the rollover determination means in a vehicle in which a backwind is disposed above the seatback, the airbag body installed near the lower side edge of the backwind faces the front side of the vehicle. As a result, it expands and expands in a curtain shape and generates tension.

  For this reason, even in a vehicle having a back window disposed above the seat back, the airbag body that expands and inflates in the form of a curtain when the vehicle rolls over or is predicted to roll over has a tension toward the vehicle interior side of the back window. Since it is located, it can suppress that a part of a passenger | crew's body moves to a vehicle outward direction.

  Here, the vicinity of the lower side edge of the back window includes the edge of the back window installed on the lower side of the back window, the rear package tray, the cross member that supports the lower end of the back window, and the like. There is no particular limitation as long as it is located on the lower side.

  Also, the rollover judging means includes all sorts of things such as those that detect rollover by detecting the roll angle of the vehicle, gravity acceleration generated in the vehicle, etc., and those that predict rollover by making a rollover prediction based on the vehicle speed and steering wheel steering angle. It is a waste.

  In addition, the method of generating the tension of the airbag body is particularly limited, such as the one that generates tension by using the force that expands and inflates, and the one that provides a tensioner device to generate tension in the airbag body. It is not something.

  In one embodiment of the present invention, the airbag main body has attachment portions that are attached to both side edges of the back window at both ends in the vehicle width direction of the airbag main body. It is set so that it expands and expands to the vehicle front side position rather than the position of the upper end of the back.

  According to the above configuration, the airbag body is fixed in the vicinity of both side edges of the back window even in the deployed and inflated state, because the mounting portions are provided in the both ends of the airbag body in the vehicle width direction. Is done. Then, in a state where the inflation and inflation are completed, the airbag body is deployed and inflated in a curtain shape from the position of the upper end of the seat back to the vehicle front side position.

  For this reason, the airbag body can cover the entire width of the back window in the vehicle width direction, and can cover from the position of the upper end of the seat back to the vehicle front side position in the vehicle longitudinal direction.

  Therefore, by deploying and inflating the airbag body, it is possible to reliably cover the upper position of the seat on which the occupant is seated, and to more reliably protect the occupant during rollover.

  In one embodiment of the present invention, the airbag body is inflated by attachment portions attached to both ends of the airbag body in the vehicle width direction in the vicinity of both side edges of the back window, and a gas supplied during deployment and expansion. At least one inflatable portion, and when the inflated portion is in a deployed and inflated state, the inflatable portion has a thickness in the vertical direction on the vehicle front side that is greater than the thickness in the vertical direction on the vehicle rear side from the position of the upper end of the seat back. It is set.

  According to the above configuration, the inflatable portion of the airbag body is inflated and inflated with the thickness in the vertical direction on the vehicle front side larger than the thickness in the vertical direction on the vehicle front side in a state where deployment and inflation are completed.

  For this reason, the vehicle front portion of the inflatable portion located above the occupant has a large thickness in the vertical direction, and when the occupant moves upward during a rollover or the like, the shock can be reliably absorbed. it can.

  Further, the vehicle front portion of the inflating portion increases the thickness in the vertical direction, so that a tension in the vehicle width direction can be generated at the upper end portion (that is, the front end portion) of the airbag body.

  Therefore, it is possible to absorb the impact when the occupant moves upward, and it is possible to generate tension in the entire airbag body by generating tension in the upper end portion of the airbag body.

  In one embodiment of the present invention, the airbag body is inflated by attachment portions attached to both ends of the airbag body in the vehicle width direction in the vicinity of both side edges of the back window, and a gas supplied during deployment and expansion. At least one inflatable portion, and the inflatable portion is set in a state in which the inflated portion is completed, and the thickness in the vertical direction of the portion corresponding to the left and right seating positions of the occupant in the vehicle width direction is set small. The thickness in the vertical direction of the portion corresponding to the portion is set large.

  According to the above configuration, the inflatable portion of the airbag body is in a state where the inflated portion is completed, and the portion corresponding to the left and right seating positions of the occupant in the vehicle width direction has a small vertical thickness and corresponds to the center portion in the vehicle width direction. The vertical thickness of the portion to be expanded greatly expands and expands.

  For this reason, while the airbag body is in an expanded and inflated state, while suppressing the thickness in the vertical direction of the inflatable portion of the portion corresponding to the seating position of the occupant, The amount of expansion in the direction can be increased to generate tension in the vehicle width direction.

  Therefore, while the airbag body can be inserted into a narrow gap between the head of the occupant and the back window, tension in the vehicle width direction can be reliably generated in the airbag body.

  In one embodiment of the present invention, the inflatable portion of the airbag body includes a central portion provided in the center in the vehicle width direction and a side portion provided so as to be positioned above the seating position of the occupant on the side in the vehicle width direction. The gas supplied to the airbag body is first supplied to the side portion and then supplied to the central portion.

  According to the above configuration, when the airbag body is deployed and inflated, gas is first supplied to the side portion of the inflatable portion provided above the seating position of the occupant, and then to the central portion in the center in the vehicle width direction. Gas will be supplied.

  For this reason, in the initial stage of rollover or rollover prediction, the airbag body will be deployed and inflated from the side, and in the narrow gap between the passenger's head located on the side of the passenger compartment and the back window, The airbag main body can be reliably inserted.

  Therefore, the airbag main body can be deployed and inflated above the occupant more reliably, and the occupant protection performance during rollover can be reliably improved.

  According to the present invention, even in a vehicle in which a back window is disposed above the seat back, the airbag main body that expands and inflates in the form of a curtain when the vehicle rolls over or is predicted to roll over has a tension in the back window. Since it is located on the side, it is possible to suppress a part of the occupant's body from moving outward in the vehicle.

  Therefore, in the airbag device for rollover of a vehicle, the movement of a part of the occupant's body from the backwind when the vehicle has a backwind above the seat back from the backwind at the time of rollover or the like is suppressed. The passenger protection performance can be further improved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an overall plan view of a vehicle adopting the vehicle rollover protection device of this embodiment.
The vehicle V of the present embodiment is a four-seater sports car that includes a front seat 1 and a rear seat 2 in a vehicle interior. A front window 3 is installed at the front of the vehicle compartment of the vehicle V, a back window 4 that is curved in the vehicle width direction is installed at the rear of the vehicle compartment, and side windows 5a and 6a are provided above the left and right doors 5 and 6, respectively. Each is installed.

  Of these, airbag bodies 10 and 20 that expand and inflate in a curtain shape when the rollover or rollover prediction of the vehicle V is detected are respectively provided on the upper peripheral edge of the side windows 5a and 6a and the lower peripheral edge of the back window 4. Installed in the stowed state.

  The airbag bodies 10 and 10 installed on the upper peripheral edge of the side windows 5a and 6a are the airbag bodies 10 and 10 of the side curtain airbag device, and the vehicles of the side windows 5a and 6a are used during a rollover or a side collision. It expands and expands in the form of a curtain on the indoor side, and suppresses movement of a part of the occupant's body in the vehicle exterior direction.

  The airbag main body 10 includes B pillars 9 and 9 via side rails 8 and 8 from the front A pillars 7 and 7 so as to surround the upper edges of the side windows 5a and 6a by attachment members (not shown). It is installed so that it may be covered with the trim member (not shown) in a vehicle interior.

  Further, the airbag body 10 has an A-pillar at its front and rear ends so that tension can be obtained in the vehicle front-rear direction in the vicinity of the opening lower edge (belt line) of the side windows 5a, 6a when deployed and inflated. 7 and 7 and the bottom ends of the B pillars 9 and 9.

In the B pillars 9 and 9, cylindrical inflators 11 and 11 for supplying gas to the airbag main bodies 10 and 10 at the time of rollover or the like are installed so that the longitudinal direction is directed in the vertical direction.
This side curtain airbag device is controlled by a control flow described later.

  The airbag main body 20 at the lower peripheral edge of the back window 4 is the airbag main body 20 of the back wind curtain airbag device, and expands and inflates in the form of a curtain on the vehicle interior side of the back wind 4 when it rolls over. Thus, the movement of a part of the occupant's body to the outside of the vehicle is suppressed.

  That is, in a sports car such as the present embodiment, the back window 4 is often inclined gently in the horizontal direction in order to lower the vehicle height and reduce the air resistance during travel. By the inclined arrangement, the back window 4 is positioned above the seat back 2 a in the standing state of the rear seat 2.

  If the back window 4 is positioned above the seat back 2a in this way, there is a possibility that a part of the occupant's body moves from the back window 4 to the outside of the vehicle when the vehicle rolls over, and the occupant protection performance may not be improved. there were.

  Therefore, in this embodiment, the airbag main body 20 is installed on the lower peripheral edge of the back window 4 to improve the occupant protection performance when the vehicle rolls over. A specific structure will be described later.

In the center of the front part of the passenger compartment, a rollover detection sensor 12 for detecting the rollover of the vehicle is installed. The rollover detection sensor 12 includes a roll angle sensor that detects a roll angle of the vehicle (an angle around the longitudinal axis of the vehicle) and a roll angular velocity, and detects, for example, a force generated in a predetermined mass according to the rotation. An angular velocity sensor, a vibration gyro, a gas rate gyro, or the like is used.
The rollover detection sensor 12 may be a rollover prediction sensor that performs a rollover prediction of the vehicle.

  The rear seat 2 is provided with a seat belt device 13 for restraining an occupant. The seat belt device 13 is a three-point seat belt device including a pretensioner mechanism that applies tension to a belt member that directly restrains the upper body of an occupant.

  Next, based on FIGS. 2-6, detailed structure, such as a backwind curtain airbag apparatus, is demonstrated. 2 is a detailed plan view of the rear part of the vehicle, FIG. 3 is a rear view of the rear part of the vehicle when the vehicle starts to roll over, FIG. 4 is a sectional view taken along line AA in FIG. 2, and FIG. 6 is a cross-sectional view taken along the line CC of FIG.

  The back wind curtain airbag device of the present embodiment includes an airbag main body 20 installed at a lower side edge of the back wind 4, two inflators 21 and 21 for ejecting gas to be supplied to the airbag main body 20, and an inflator The communication pipes 22 and 22 supply the gas ejected from the gas tanks 21 and 21 to the airbag body 20.

  The airbag body 20 is located on the lower side edge of the back window 4, specifically, the front part of the cross member 23 that supports the lower end of the back window 4 and extending in the vehicle width direction, and both sides of the back window 4. At the rear end of the pillar 24, it is installed in a folded storage state so as to be substantially U-shaped in plan view.

  A fixed wind glass 25 is installed between the C pillar 24 and the B pillar 9.

  The airbag body 20 is a plane including a bag-like inflatable portion 26 and a cloth-like non-inflatable portion 27 that are deployed and inflated toward the upper end of the bag window 4 and an attachment portion 28 that is connected and fixed to the C pillar. It is constituted by a cloth back member having a substantially trapezoidal shape. The attachment portion 28 may be a single point on the top of the C pillar.

  FIG. 2 shows a state in which the airbag main body 20 is deployed and inflated in a curtain shape. As shown in this figure, when the airbag body 20 is deployed and inflated toward the front side of the vehicle, the airbag body 20 is deployed and inflated so as to cover almost all of the back window 4 (up to a position slightly ahead of the position of the upper end of the seat back 2a). To do.

  For this reason, the airbag main body 20 that is deployed and inflated in the form of a curtain is positioned between the occupant of the rear seat 2 and the back window 4, and when the vehicle V rolls over, It can suppress that a part moves to a vehicle outside direction.

  In particular, by deploying and inflating the airbag main body 20 from the rear side of the vehicle, even if the occupant's head H exists, the head H is easily displaced forward with respect to the action from the rear. Therefore, the airbag H can be reliably deployed and inflated between the occupant's head H and the back window 4.

  The aforementioned bag-like inflatable portion 26 extends on both sides of the airbag body 20 in the vehicle width direction, side portions 26b and 26b extending upward from the lower end portion, and extending upward from the center portion in the vehicle width direction center. The center portion 26a and the side portions 26b, 26b are formed in a three-pronged shape with the upper end portions communicating with each other. The side portions 26b and 26b are positioned in the vicinity of the upper side of the head of the occupant seated on the left and right, respectively, and the central portion 26a is located above the head of the occupant when the occupant is seated in the center in the vehicle width direction of the seat. Located near the side.

  Gas supply ports 26d and 26d are provided in the center in the vertical direction of the side portions 26b and 26b of the inflating portion 26 so that the gas from the inflators 21 and 21 is taken into the inflating portion 26. Therefore, when the airbag body 20 is deployed and inflated, the side portions 26b and 26b are first deployed and inflated, and then the central portion 26a is deployed and inflated.

  In the present embodiment, a seating position for the rear seat occupant (a position where the headrest 2b is installed) is set below the side portions 26b and 26b. Therefore, the airbag main body 20 can be inserted into the gap between the occupant's head H and the back window 4 at the initial timing of deployment and inflation of the airbag main body 20, and the airbag main body 20 can be surely placed above the occupant. Can be expanded and inflated.

  In particular, in a vehicle such as the present embodiment in which the back window 4 is curved in a horizontal section so as to be convex toward the vehicle rear side along the vehicle width direction, the space between the head H of the occupant and the back window 4 is Since the gap is particularly small, the effect of such a configuration can be enjoyed more remarkably.

  Further, as shown in FIG. 5, the side portions 26b and 26b on both sides of the inflating portion 26 are in the unfolded and expanded state, and the vehicle is more than the vertical thickness t1 on the vehicle rear side from the position of the upper end of the seat back 2a. The front side vertical thickness t2 is set large.

  Thus, by setting the vertical thickness t2 on the vehicle front side of the side portion 26b to be large, the vehicle front side portion 26b2 located above the occupant has a large thickness, and the occupant moves upward during the rollover. When this occurs, the impact can be absorbed with certainty.

  Further, since the vehicle front side portion 26b2 is greatly expanded and inflated, a tension in the vehicle width direction can be generated in the upper end portion 20a of the airbag body 20.

  In addition, the vehicle rear side portion 26b1 of the side portion 26b does not have a large vertical thickness t1. This is because it is sufficient to secure an expansion amount enough to cause tension in the vehicle width direction at the lower portion of the airbag body 20.

  Further, since the vertical thickness t1 of the vehicle rear side portion 26b1 is not set to be large in this manner, the amount of gas supply can be reduced, so that the inflator 21 can be downsized and the airbag body 20 can be deployed and expanded early. Can be.

  Further, as shown in FIG. 4, the center portion 26a of the inflating portion 26 is set in a state in which the inflated and completed inflated state, the vertical thickness t3 on the vehicle rear side relative to the position of the upper end of the seat back 2a is set to a medium. The vertical thickness t4 on the side is set large.

  Thus, by setting the vertical thickness t4 of the vehicle front side portion 26a2 to be larger than that of the vehicle rear side portion 26a1, when the rear seat 2 has two persons, the vehicle is expanded and expanded at the vehicle center position where no passenger is present. The vehicle front side portion 26a2 in the direction can be greatly inflated, and a large tension can be generated in the upper end portion 20a of the airbag body 20 in the vehicle width direction.

  In particular, in the case of a vehicle in which the back window 4 is configured with a curved surface curved in the vehicle width direction as in the present embodiment, a large expansion space cannot be secured on the side of the vehicle interior. A tension in the vehicle width direction can be generated by greatly inflating the inflatable portion 26 in a place where it is easy to secure an inflatable space.

  6 is a cross-sectional view taken along the line CC in FIG. 2. As shown in FIG. 6, when the back window 4 is curved in the vehicle width direction, the vehicle interior (lower part of the drawing) It is possible to secure a space larger than the side position. For this reason, the vertical thickness t4 of the central portion 26a can be made larger than the vertical thickness t2 of the side portions 26b and 26b, and the vertical thickness t2 of the side portions 26b and 26b can be set to be not so large. A tension in the vehicle width direction can be generated in the upper end portion 20a of the airbag body 20.

  If the bag window 4 is a vehicle that is curved in the vehicle width direction as described above, the airbag main body can be deployed and inflated even by three persons who can sit in the center of the rear seat in the vehicle width direction. it can.

  As described above, the vehicle rear side portion 26a1 of the central portion 26a is set to a medium level, but this is only inflated to the extent that tension in the vehicle width direction at the center in the vertical direction of the airbag body 20 is generated. This is because the occupant's shock absorbing performance is not required. For this reason, the vertical thickness t3 of the vehicle rear side portion 26a1 may be small or not set at all if the vehicle width direction tension can be generated.

  It should be noted that the vertical thicknesses t1 and t2 of the side portions 26b and 26b described above can protect the occupant when the side portions 26b and 26b are inflated as much as possible. It is preferable to set the degree from large to large.

  Further, as indicated by a broken line in FIG. 2, the central portion 26a may be extended to the rear side of the vehicle, and gas may be supplied from the inflator 121 installed at the rear end of the central portion 26a. In this case, since the gas is supplied from the center in the vehicle width direction, the gas can be supplied uniformly to the entire airbag body 20, and the back wind It can install compactly in the peripheral part.

  The cloth-like non-expandable portion 27 is configured to be positioned between the expandable portions 26a, 26b, and 26b, and has a function of stabilizing the position of each of the expandable portions 26a, 26b, and 26b at the time of expansion and expansion, A function of suppressing upward movement of the occupant.

  The mounting portion 28 described above is provided at an end portion on the outer side in the vehicle width direction of the airbag body 20, and the airbag body 20 is firmly attached to the outer side edge portion of the back window 4.

  Since the upper end of the attachment portion 28 is attached to the upper portion of the C pillar 24, when the airbag body 20 is deployed and inflated, tension can be generated at the upper end portion 20a.

Further, the rear side end portion of the airbag body 20 is also fixed to the rear side end portion of the bag window 4.
The inflators 21 and 21 described above are arranged inside the left and right C pillars 24 so that the longitudinal direction is directed in the vertical direction.

  This inflator 21 is not a general inflator that generates a high-temperature gas by igniting a gas generating agent such as sodium azide with an ignition device, but encloses a predetermined compressed gas and releases the closing valve during operation. This is a low-temperature gas type inflator 21 for supplying a low-temperature gas (a gas having a temperature slightly higher than the atmospheric temperature) to the airbag body 20.

  This low temperature gas type inflator 21 does not cause a phenomenon in which the gas volume is rapidly contracted by the constant temperature air in the passenger compartment and the gas volume is instantaneously contracted unlike the high temperature type when the airbag body 20 is deployed and inflated. Generally, it is used when the airbag body 20 is deployed and inflated for a long time.

  The communication pipes 22 and 22 are installed inside the C pillar 24 so as to connect the jet outlets at the upper ends of the inflators 21 and 21 and the gas supply ports 26d and 26d of the airbag body 20.

  By supplying gas from the gas supply ports 26d and 26d of the left and right side portions 26b and 26b to the airbag body 20 through the communication pipes 22 and 22, as described above, the airbag body 20 has the side portions 26b and 26b, Thus, the airbag body 20 can be deployed and inflated at an early stage in the narrow gap between the occupant's head H and the back window 4.

  As shown in FIG. 5, the seat belt device 13 includes a retractor device 14 with a pretensioner fixed to a vehicle body panel, a belt member 15 that restrains an occupant's upper body, and a buckle member 16.

  The seat belt device 13 is a type in which a shoulder anchor (a member that supports the upper end portion of the belt member) is installed in the B pillar, but is not limited thereto, and a type in which a retractor device is built in the seat back 2a. It may be.

  Although the pretensioner has a general structure and will not be described in detail, when a predetermined operation signal is received, the belt member 15 is forcibly pulled into the retractor 14 device, and the upper body of the occupant is lifted. It is constrained to the seat back 2a.

  In order to further increase the restraining force of the occupant, a wrap pretensioner that pulls the buckle member 16 toward the lower side of the vehicle may be provided and operated simultaneously with the pretensioner.

A control block for controlling the above configuration will be described with reference to FIG.
The vehicle rollover protection device of the present embodiment connects a vehicle speed sensor 31 that is an input means and a rollover detection sensor 12 to a central processing unit (CPU) 30 that is an arithmetic processing means, and a seat that is an output means. A control block is configured by connecting the pretensioner 31 of the belt device, the inflator 11 of the side curtain airbag device, and the inflators 21 and 21 of the back window curtain airbag device.

  Further, by connecting a side collision sensor or the like as the input means, these output means may be configured to operate even in the case of a side collision of the vehicle.

This control block is controlled by the control flow shown in FIG.
First, in S1, data obtained by the vehicle speed sensor 31 and the rollover detection sensor 12 are input. At this time, the vehicle speed, roll angle, and roll angular velocity are input to the central processing unit.

  Next, in S2, a rollover determination is performed. For example, when the vehicle speed is 100 km / h or more and the roll angle is 5 ° or more and the roll angular velocity is a predetermined value or more, it is determined that the possibility of rollover is high.

  In S3, it is determined whether the rollover possibility is determined to be large. If it is not determined that the rollover possibility is large (NO), the process proceeds to S1 again and the above-described control is performed.

  On the other hand, if it is determined in S3 that the rollover possibility is high (YES), the process proceeds to S4 and the pretensioner of the seat belt device 13 is operated.

  Thus, the pretensioner is actuated first by restraining the occupant's upper body immediately at the time of rollover judgment, thereby making it difficult for the occupant's head H to move and ensuring that the airbag body 20 This is for expanding and inflating between 4 and the head H of the occupant.

  Then, the process proceeds to S5, where the inflator 11 of the side curtain airbag device is operated, and the airbag body 10 is deployed and inflated in a curtain shape on the side of the side windows 5a, 6a.

  Then, the process further proceeds to S6, where the inflator 21 of the backwind curtain airbag device is operated, and the airbag body 20 is deployed and inflated in a curtain shape on the vehicle interior side of the backwind 4.

  The operation timing of the inflators 11, 21, and 21 may be set so that the side curtain airbag device and the back window curtain airbag device are substantially simultaneously, or the back wind curtain airbag device is delayed.

  In the case of substantially the same time, it is possible to cover the occupant's head H at an early stage, and safety can be improved. In addition, when the backwind curtain airbag device is slowed down, It becomes easy to insert the airbag body 20 at the timing when the gap between the back windows 4 is widened.

  In this backwind curtain airbag device, since two inflators 21 and 21 are set on the left and right, the operation timing of the inflators 21 and 21 may be changed according to the rollover direction. For example, when the vehicle V rolls over to the left, the left inflator 21 may be actuated first to control the airbag body 20 to be deployed and inflated from the left.

  Thus, when the operation timing is changed according to the rollover direction, the airbag body 20 can be appropriately deployed and inflated with respect to the behavior of the passenger's body that changes depending on the rollover direction. Can improve the safety protection performance.

  In this way, the airbag main bodies 10 and 20 are deployed and inflated in the shape of curtains on the side windows 5a and 6a and the back window 4, respectively, and the movement of a part of the occupant's body is prevented from moving outward. To do.

  Since the inflators 21 and 21 are composed of low-temperature type inflators as described above, this expanded and inflated state can be secured for a long time, and after the gas injection of the inflator is completed, the inflated and expanded state is maintained for a predetermined time. To maintain. Therefore, the airbag main body 20 can be deployed and inflated in a curtain shape until the vehicle rollover is completed.

  According to the control flow described above, the vehicle rollover protection device of the present embodiment is controlled, and the occupant protection performance during rollover can be improved.

  As described above, in the vehicle rollover protection device of the present embodiment, the airbag body 20 is deployed and inflated in a curtain shape not only on the side windows 5a and 6a but also on the vehicle interior side of the back window 4; Even if the vehicle is positioned above the seat back 2a of the rear seat, it is possible to suppress a part of the occupant's body from moving from the back window 4 toward the outside of the vehicle.

  In particular, the airbag main body 20 is installed on the lower peripheral edge of the back window 4 so that the airbag main body 20 is deployed and inflated from the rear on the vehicle interior side of the back wind 4 when the vehicle V rolls over or is predicted to roll over. Even if the head H of the occupant is present, the head H is easily displaced forward with respect to the action from the rear, so that the head H is less likely to affect the deployment and inflation of the airbag body 20. The airbag main body 20 can be reliably deployed and inflated between the head H of the occupant and the back window 4, and the occupant protection performance can be further improved.

  Next, another embodiment shown in FIGS. 9 and 10 will be described. In this embodiment, the configuration on the vehicle body side is different from the above-described embodiment, only the B pillar 9 is provided without providing the C pillar, and both end portions of the back window 104 are further rearward in the horizontal section along the vehicle width direction. It is configured as a curved surface.

  For this reason, the airbag main body 120 sets the installation positions of both ends thereof to the rear end of the B pillar 9 and sets the installation position of the lower end to the front end of the rear package tray 101 behind the seat back 2a of the rear seat 2. It is set.

  Also in this embodiment, the airbag main body 120 is installed in the vicinity of the lower side edge portion of the back window 104, and other components are the same as those in the above-described embodiment. In addition, about the same component, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In this embodiment, the airbag main body 120 is installed at the front end portion of the rear package tray 101, specifically, the front portion of the cross frame 101a at the front end of the rear package tray 101 and the attachment portion 128 at the rear end portion of the B pillar 9. At the time of deployment and expansion, the vehicle expands and expands in a state indicated by a one-dot chain line toward the vehicle front side (upper side).

Note that an inflator, a rollover detection sensor, and the like (not shown) are the same as those in the above-described embodiment.
Thus, the airbag main body 120 can be deployed and inflated in the form of a curtain between the occupant's head H and the back window 104 by deploying and inflating the airbag main body 120.

  In particular, in this embodiment, since the gap between the occupant's head H and the back window 104 is larger than that in the above-described embodiment, the thickness of the airbag body 120 during deployment is ensured to be larger than that described above. It is possible to improve the shock absorbing performance.

  In addition, in the space on the rear package tray 101, the airbag main body 20 does not expand and inflate, so even if there is a load on the rear package tray 101, the expansion and expansion of the air bag main body 120 is not affected. The airbag body 120 can be deployed and inflated more reliably.

In addition, about another effect, it is the same as that of the above-mentioned embodiment.
As described above, in the correspondence between the configuration of the present invention and the above-described embodiment,
The seat of this invention corresponds to the rear seat 2,
Similarly,
The rollover judging means corresponds to the central processing unit 30 of the embodiment,
The present invention is not limited to the above-described embodiment, but includes an embodiment applied to a rollover-compatible airbag device for any vehicle.

  For example, the present invention is not limited to a four-seater vehicle, and may be implemented by a five-seater vehicle that can seat three people in the rear seat, or a two-seater vehicle that does not have a rear seat. The “seat” in this case corresponds to a driver seat or a passenger seat.

  The inflator may also be a hot gas type inflator. Further, the shape of the airbag main body is not limited to a substantially trapezoidal shape in plan view, and may be a rectangular shape or a circular shape having a curvature according to the shape of the back window.

  In addition, regarding the structure that creates tension in the airbag body, if a sufficient space for deploying and inflating the airbag body cannot be secured, a separate tensioner device may be provided to create tension.

1 is an overall plan view of a vehicle that employs the present embodiment. The detailed top view of a vehicle rear part. The rear view of the vehicle rear part at the time of rollover start. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. FIG. 3 is a sectional view taken along line B-B in FIG. 2. The CC sectional view taken on the line of FIG. The control block diagram of this embodiment. The control flowchart of this embodiment. The detailed top view of the vehicle rear part of other embodiment. Sectional drawing corresponding to FIG. 4 of other embodiment.

Explanation of symbols

2 ... Rear seat (seat)
2a ... Seatback 4, 104 ... Back window 10, 20, 120 ... Airbag body 12 ... Rollover detection sensor 13 ... Seat belt device 30 ... Central processing unit (rollover judging means)
26 ... Expansion part 26a ... Center part 26b, 26b ... Side part

Claims (5)

A vehicle rollover-compatible airbag device in which a back window is disposed above a seat back in a standing state of a seat disposed in a vehicle interior,
A rollover judging means for detecting or predicting rollover of the vehicle and judging rollover;
An airbag main body that is installed in the vicinity of the lower side edge of the back window in the stowed state and that develops and inflates in the form of a curtain toward the front side of the vehicle when the rollover judging means determines rollover. Airbag device for vehicle rollover. The airbag body has attachment portions that are attached to both side edges of the back window at both ends in the vehicle width direction of the airbag body,
The airbag apparatus for rollover of a vehicle according to claim 1, wherein the airbag apparatus is set so as to be deployed and inflated from the position of the upper end of the seat back to a position on the front side of the vehicle in a state where deployment and inflation are completed. The airbag body is attached to both end portions of the back window at both ends in the vehicle width direction of the airbag body; and
And at least one inflatable portion that is inflated by a gas supplied at the time of expansion and expansion,
3. The vehicle according to claim 1, wherein the inflatable portion is set in a state in which the inflated portion has been deployed and expanded, and the thickness in the vertical direction on the vehicle front side from the position of the upper end of the seat back is set larger than the thickness in the vertical direction on the vehicle rear side. Airbag device for rollover. The airbag body is attached to both ends in the vehicle width direction in the vicinity of both side edges of the back window;
And at least one inflatable portion that is inflated by a gas supplied at the time of expansion and expansion,
The inflatable portion is set in a state in which the inflated portion is completed, and the thickness in the vertical direction of the portion corresponding to the left and right seating positions of the occupant in the vehicle width direction is set small, and the thickness in the vertical direction of the portion corresponding to the center side portion in the vehicle width direction The airbag device for rollover of a vehicle according to claim 1, wherein a large is set. The inflatable portion of the airbag body includes a central portion provided at the center in the vehicle width direction and a side portion provided so as to be positioned above the seating position of the occupant on the side in the vehicle width direction,
The airbag device for rollover of a vehicle according to claim 3 or 4, wherein gas supplied to the airbag body is first supplied to the side portion and then supplied to the central portion.

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