JP2005297846A - Occupant protecting device of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system capable of protecting properly an occupant against the vehicle roll-over by actuating several sorts of protecting means simultaneously, or one after another in order to heighten the degree of occupant protection gradually, or changing the control pattern in accordance with the rolling condition of the vehicle body. <P>SOLUTION: The occupant protecting device of the vehicle is equipped with means 31, 51, 53 to sense the roll angle and the rolling angular velocity of the vehicle body, means 54, 55, 56, 58, 59 to work when the rolling angular velocity is equal to or over the level to result in rollover ineviatably and control so as to simultaneously actuate pretentioners for seat belts 60 and 61, those of air bags 62a, 62b, 63a, 63b mounted on both sides of each seat which are located at least in front of the rollover direction and air bags 66 and 67 mounted ahead of the seat, and the means 52, 55, 56, 58, 59 to work when the rolling angular velocity is below the level to result in rollover ineviatably and control so as to actuate one after another the pretentioners for the seat belts 60 and 61, those of the air bags 62a, 62b, 63a, 63b mounted on both sides of the seat which are located at least in front of the rollover direction and the air bags 66 and 67 mounted ahead of the seat. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an apparatus for protecting an occupant from a vehicle rollover.

When turning the vehicle, when the roll angle or roll angular velocity of the vehicle body is increased, the vehicle is prevented from rolling over by control for reducing engine rotation or brake control. (Patent Document 1). Although it is a container carrier occupant protection device, a plurality of airbags are arranged in a layout that surrounds the occupant in the cab, and these airbags are determined when the inversion of the vehicle is determined to be inevitable based on the degree of inclination of the vehicle body. Is disclosed that functions as a cushion that protects an occupant from an impact at the time of roll-over (Patent Document 2).
2001-105927 JP-A-8-127305

  In the case of Patent Document 2 (device that protects an occupant from overturning), if it is determined that the inversion of the vehicle is inevitable, a plurality of airbags are inflated, so that the occupant cannot move due to the airbag surrounding the occupant after the rollover Can be considered. Traditionally, seat belts have been used to protect passengers, but in the seats of commercial vehicles such as trucks where the height of the vehicle is large and the position of the cab is high, the upper body of the passenger is seated vertically, The amount of movement of the occupant in the lateral direction cannot be sufficiently suppressed, although the amount of movement of the occupant in the front-rear direction can be well suppressed. As a result, the occupant's body may rub through the seat belt and roll out from the seat in the rollover direction. When the seat belt is a pretensional type, the pretensioner generates gas when the sensor detects the impact from the front, and the expansion force instantly winds up the slack of the seat belt. There is a possibility that the pretensioner does not work when the vehicle rolls over, because it is difficult for the sensor to detect the impact.

  This invention is not only based on one type of protective means, but also several types of protective means can be applied simultaneously, or in order to gradually increase the protection of the occupant, or depending on the roll condition of the vehicle body. An object is to provide a system capable of appropriately protecting an occupant from rollover by changing a control pattern of means.

  According to a first aspect of the present invention, there is provided a device for protecting an occupant from a rollover of a vehicle, a means for detecting a roll angle and a roll angular velocity of a vehicle body, and a seat belt pretensioner and both sides of a seat when the roll angular velocity is equal to or higher than a roll inevitable level. When the roll angular velocity is less than the inevitable rollover means, the airbag positioned at least in front of the airbag in the rollover direction, the airbag installed in front of the seat, and the roll angular velocity are controlled to operate simultaneously. Based on the roll angle, the seat belt pretensioner, the airbag provided at least in the rollover direction of the airbag provided on both sides of the seat, and the airbag provided in front of the seat are sequentially operated. And means for controlling.

  According to a second aspect of the present invention, in the vehicle occupant protection device according to the first aspect of the invention, when the roll angular velocity is less than the inevitable rollover level, the seat belt pretensioner and the air installed on both sides of the seat are based on the roll angle. With respect to the means for controlling the airbag positioned at least in front of the rollover direction and the airbag installed in front of the seat in order, the continuation state where the roll angle is equal to or higher than the first determination level is a predetermined time. Means for actuating the seat belt pretensioner, and means for actuating the closing operation means for the power window located on the front side in the rollover direction when the roll angle exceeds the second determination level for a predetermined time. When the continuation state where the roll angle is equal to or higher than the third judgment level reaches a predetermined time, it is positioned at least on the front side in the rollover direction of the airbag installed on both sides of the seat. Means for actuating the air bag which is characterized in that it comprises the the air bag predetermined time from the actuation of has passed and means for actuating the air bag to be mounted to the front of the seat, the.

  According to a third aspect of the present invention, in the vehicle occupant protection device according to the first aspect, the airbag provided on both sides of the seat and the airbag provided in front of the seat do not have a vent hole. To do.

  According to a fourth aspect of the present invention, in the vehicle occupant protection device according to the first aspect of the present invention, the airbag installed in front of the seat is provided by a plug that closes the vent hole and an ON of a release switch disposed near the seat. And means for opening a plug of the gas vent hole.

  According to a fifth aspect of the present invention, in the vehicle occupant protection device according to the first aspect of the present invention, the vehicle occupant protection device includes means for generating alert information for rollover during the roll angle when the roll angle reaches or exceeds the alert level.

  In the first aspect of the invention, when the roll angular velocity is less than the inevitable rollover level, as the roll angle becomes larger, at least the front side of the rollover direction among the pretensioner of the seat belt and the airbags provided on both sides of the seat. It is effective in the order of the airbag and the airbag installed in front of the seat. When the seat belt pretensioner is actuated, the slack of the seat belt is taken up instantly, the occupant's restraint on the seat is strengthened, and the amount of movement of the occupant in the lateral direction is also minimized. When the airbag located on the front side in the rollover direction is actuated, the inflating airbag serves as a cushion that protects the occupant from impact during rollover. When the airbag located in front of the seat is activated, the airbag is inflated into the front space of the occupant and becomes a cushion for protecting the occupant. By sequentially operating these protection means, an appropriate protection state of the occupant can be obtained at the time of rollover without imposing a heavy burden on the occupant at one time. On the other hand, if the roll angular velocity suddenly increases and exceeds the inevitable rollover level, there is no room for sequentially operating these protection means, so all of them including the protection means already in operation must be operated simultaneously. become. For this reason, even in a roll state in which the change of the roll angle is steep, an appropriate protection state for the occupant can be obtained without delaying the rollover.

  In the second invention, the respective protection means are sequentially operated on the basis of the roll angle and the duration of each judgment level or higher. Even if the roll angle exceeds the judgment level, it may still return below the judgment level, but by setting the duration, it is possible to accurately judge that the risk of rollover gradually increases. . In addition, when the power window closing side operation means is activated, the window glass located on the front side in the rollover direction is closed or held in a closed state, so that the occupant's upper body exits from the opened window glass. You can prevent it.

  In the third invention, the airbags installed on both sides and the front of the seat do not have a gas vent hole unlike the existing ones, so that it takes time to deflate when inflated, and functions as a cushion for a long time. become.

  In the fourth aspect of the invention, the airbag installed in front of the seat includes a plug that closes the vent hole and a means that opens the vent hole by turning on the release switch, unlike the existing one. When the plug is opened after the rollover, the airbag is deflated, so that it is easy to escape from the vehicle. When escaping from the vehicle, the release switch is turned ON and the unlocking of the seat belt is operated.

  In 5th invention, since alerting information precedes, a passenger | crew can receive the action | operation of each protection means without resistance.

  The figure explains the application example to the tractor of the coupled vehicle according to the embodiment of the present invention. In FIG. 1, reference numeral 21 denotes a frame, which is suspended from the axle 15 via left and right suspension springs 19. On the left and right sides of the frame 21, vehicle height sensors 31 for detecting the height of the vehicle body are provided. The vehicle height sensor 31 employs a potentiometer, and one end of a lateral link 29 is connected to the rotation shaft (input shaft). The other end of the horizontal link 29 is pin-coupled to one end of the vertical link 27, and the other end of the vertical link 27 is attached to the axle 15. Reference numeral 23 denotes a fifth wheel coupler.

  When the vehicle body 13 (cab) is mounted on the frame 21 and the vehicle body 13 and the frame 21 are tilted to the left and right with respect to the axle 15, the distance from the axle 15 changes on the left and right of the frame 21 (see FIG. 3). The reciprocating motion of the longitudinal link 27 is converted into the rotational motion of the lateral link 29 and is input to the rotating shaft 33 of the vehicle height sensor 31 and the output of the vehicle height sensor 31 (electrical signal corresponding to the distance between the frame 21 and the axle 15). Is input to the control unit 50.

  The control unit 50 is constituted by a microcomputer including an input port and an output port, a ROM and a RAM, and a CPU. In addition to the vehicle height sensor 31, a release switch 70 described later is connected to the input port. Various occupant protection means to be controlled are connected to the output port.

  As for various occupant protection means, the driver seat belt pretensioner 60 and the passenger seat belt pretensioner 61, the airbag 62a installed on the right side of the driver seat, and the airbag installed on the right side of the passenger seat. 63a, an airbag 62b installed on the left side of the driver's seat, an airbag 63b installed on the left side of the passenger seat, a closing operation means of the power window 64 installed on the driver side door, and a door on the passenger side The closing operation means of the power window 65 to be installed, the airbag 66 and 67 installed in the instrument panel at the center of the steering wheel and the front of the passenger seat are set.

  Reference numeral 68 denotes means for generating alert information relating to the rollover of the vehicle. Unlike the existing airbags, the airbags 62a, 62b, 63a, 63b are provided with a plug that closes the vent hole and means for opening the plug when the release switch 70 is turned on. FIG. 5 illustrates the arrangement (layout) of each protection means around the driver's seat, where 60 is a seat belt and includes a pretensioner 60a. Reference numerals 62a and 62b indicate airbags mounted on the left and right sides of the seat, 66 indicates an airbag mounted on the center of the steering wheel, and 64a indicates a power window closing side operation means. Although not shown, the protection means are similarly arranged on the passenger seat side.

  FIG. 2 shows a functional block configuration of the control unit 50. The roll angle calculation means 51 for obtaining the roll angle θ, and the change θ ′ (differential value) per unit time of the absolute value of the roll angle θ. Based on these determinations, a roll angular velocity calculation means 53 to be obtained, a means 52 for determining the degree of risk that the vehicle will roll over based on the roll angle θ, a means 54 for determining whether the vehicle is inevitable of rollover based on the roll angular velocity θ ′. A means 55 for controlling each of the output means 56 to 60, and an occupant protection release determination means 61.

The roll angle θ is obtained by θ = tan ⁻¹ (HR−HL) / B. In FIG. 4, HR is the output of the right vehicle height sensor 31, HL is the output of the left vehicle height sensor 31, and H displays (HR-HL). PR is the other end (lower end attached to the axle 15) position of the right vertical link 27, PL is the other end (lower end attached to the axle 15) position of the left vertical link 27, and B is the PR position and PL. Displays the distance (interval) from the position. In the roll angle calculation means 51, the calculated value of the roll angle θ is output with a positive / negative sign relating to (HR−HL). When (HR-HL) is positive, it is determined to roll to the left, and when (HR-HL) is negative, it is determined to roll to the right.

In the determining means 52 based on the roll angle θ, reference values for determining the degree of the roll angle θ (attention level θ ₀ , rollover danger alarm 1 level θ ₁ , rollover danger alarm 2 level θ ₂ , rollover inevitable 1 level) means for storing θ ₃ , inevitable rollover 2 level θ ₄ ), means for determining whether the roll angle θ is equal to or greater than a reference value, and a reference value (set time) for determining the duration T when the roll angle θ is greater than a specific level Means for storing T ₁ to set time T ₄ ), means for determining whether or not the duration T is equal to or greater than a reference value, and means for outputting these determination signals (signals for determining the degree of risk that the vehicle will roll over). Prepare. For the reference value for determining the degree of the roll angle θ, the alert level θ ₀ <the rollover danger alarm 1 level θ ₁ <the rollover danger alarm 2 level θ ₂ <the rollover inevitable 1 level θ ₃ <the rollover inevitable 2 level θ ₄ , The relationship is set.

In the determination means 54 based on the roll angular velocity θ ′, a means for storing a reference value (a roll inevitable level θ _a ′ to a roll inevitable level θ _d ′) for determining the degree of the roll angular velocity θ ′, and the roll angular velocity θ ′ is a reference value. Means for determining whether or not the above is satisfied, and means for outputting a determination signal (determination signal as to whether the vehicle is inevitable to roll over). 'The reference value determining the degree of rollover unavoidable level theta _a' roll velocity theta> rollover unavoidable level theta _b '> rollover unavoidable level theta _c' <rollover unavoidable level theta _d ', is set to the relationship.

6 and 7 are flowcharts for explaining the control contents of the control unit, which are executed every predetermined control cycle. A to D are symbols for displaying the connection relationship between the flowchart of FIG. 6 and the flowchart of FIG. In S1, the output (HR, HL) of the vehicle height sensor 31 is read. In S2, roll angle θ = tan ⁻¹ (HR−HL) / B is calculated. In S3, roll angular velocity θ ′ (change of roll angle | θ | per unit time) is calculated. In S4, it is determined whether or not roll angular velocity θ ′ ≧ rolling inevitable level θ _a ′. When the determination of S4 is yes, the process proceeds to S5, and when the determination of S4 is no, the process proceeds to S9.

In S5, the roll angle | determines whether ≦ rollover danger warning 2 levels theta ₂ | theta. If the determination in S5 is yes, the process proceeds to S6, and it is determined whether or not the roll angle | θ | ≧ attention level θ ₀ . When the determination of S6 is yes, the process proceeds to S7 and generates alert information, whereas when the determination of S6 is no, the process returns. When the determination of S5 is no, the process proceeds to S6 and S10, and the pretensioner of the seat belts 60 and 61 is activated together with the generation of alert information.

In S9, it is determined whether or not the roll angle | θ | ≧ 1 rollover risk level ₁ θ ₁ . If the determination in S9 is yes, in S10, the duration T of the roll angle | θ | ≧ rolling risk 1 level θ ₁ is measured. In S11, it is determined whether or not duration T ≧ set time T ₂ (roll angle | θ | ≧ rolling danger 1 level θ ₁ duration T reaches set time T ₂ ). When the determination in S11 is yes, the pretensioner for the seat belts 60 and 61 is operated in S12. If the determination in S11 is no, a return is reached.

In S4 to S12, when the roll angle | θ | ≧ the alert level θ ₀ (see FIG. 9) or the alert level θ ₀ <the roll angle | θ | ≦ the rollover danger alarm 2 level θ ₂ (see FIG. 10) Will generate alert information. When the roll angular velocity θ ′ <the inevitable rollover level θ _a ′, the roll angle | θ |> the rollover danger alarm 2 level θ ₂ , the pretensioner of the seat belts 60 and 61 operates immediately, while the roll angular velocity θ ′. When the roll angle unavoidable level θ _a ′ is satisfied, the pretensioner of the seat belts 60 and 61 is activated when the roll angle | θ | ≧ the rollover danger alarm level θ1 has a duration T that reaches the set time T1.

In S13, determines whether the roll angular velocity theta '≧ rollover unavoidable level theta _b. When the determination of S13 is yes, the process proceeds to S34, and when the determination of S13 is no, the process proceeds to S14. In S14, it is determined whether or not the roll angle | θ | ≧ rolling inevitable 1 level θ ₃ . When the determination in S14 is yes, in S15, the duration T of the roll angle | θ | ≧ rolling inevitable 1 level θ ₃ is measured. In S16, it is determined whether or not roll angular velocity θ ′ ≧ rolling inevitable level θ _c . When the determination of S16 is yes, the process proceeds to S34, and when the determination of S16 is no, the process proceeds to S17. In S17, the roll angle | determines whether the duration T of ≧ rollover unavoidable 1 Level theta ₃ spans set time T ₂ | theta. If the determination in S17 is yes, it is determined in S18 whether the sign of the roll angle θ is positive (the front side in the rollover direction is left). When the determination of S18 is yes, the process proceeds to S19, while when the determination of S18 is no, the process proceeds to S25.

In S19, the closing side operation means of the left power window 65 is operated. In S20, it is determined whether or not the roll angle | θ | ≧ rolling inevitable 2 level θ ₄ . When the determination of S20 is yes, the process proceeds to S34, while when the determination of S20 is no, a return is reached. In S21, the duration T of the roll angle | θ | ≧ rolling inevitable 2 level θ ₄ is measured. In S22, it is determined whether or not roll angular velocity θ ′ ≧ rolling inevitable level θ _d . When the determination of S22 is yes, the process proceeds to S34, and when the determination of S22 is no, the process proceeds to S23. In S23, it is determined whether or not the duration T of the roll angle | θ | ≧ rolling inevitable 2 level θ ₄ reaches the set time T3. If the determination in S23 is yes, the airbag 62b on the left side of the driver seat and the airbag 63b on the left side of the passenger seat are actuated in S24. On the other hand, if the determination in S23 is no, a return is reached.

In S25 to S30, the same processing as S19 to S23 is performed on the closing operation means of the right power window 64, the right airbag 62a of the driver's seat, and the right airbag 63a of the passenger seat. In S31, an elapsed time T from the start of operation of the airbags 62b and 62b or the airbags 62a and 63a is measured. In S32, determines whether the elapsed time T from the start these operating reaches the set time T _4. When the determination in S32 is yes, the airbag 66 installed in front of the driver seat and the airbag 67 installed in front of the passenger seat are operated.

In S13～S33, when the roll angular velocity theta 'is less than the rollover unavoidable level theta _b below and rollover unavoidable level theta _c, roll angle | theta | overturned unavoidable 1 Level theta ₃ (FIG. 11, reference) or duration T Reaches the set value T ₂ , the closing side operation means of the power window 65 or 64 provided on the front side in the rollover direction is activated. When the roll angular velocity theta 'is less than the rollover unavoidable level theta _b below and rollover unavoidable level theta _c below and rollover unavoidable level [theta] d, the roll angle theta overturned unavoidable 2 levels theta ₄ (FIG. 12, reference) or duration T is When the set value T3 is reached, among the airbags 62a, 62b, 63a, 63b provided on both sides of the seat, the airbag 62b, 63b or 62a, 63a on the front side in the rollover direction operates. Thereafter, when the time measured from the start of the operation reaches the set time T4, the airbags 66 and 67 provided in front of the seat are operated.

If the determination in S13 is no or the determination in S16 is no or the determination in S22 is yes, the process proceeds to S34, and it is determined whether the sign of the roll angle θ is positive (the front side in the rollover direction is left). Depending on the determination of S34, in S35 or S39, among the airbags 62a and 62b installed on both sides of the driver's seat, the airbag 62a or 62b on the front side in the rollover direction, and the airbags 63a and 63b installed on both sides of the passenger seat. The airbag 63a or 63b on the front side in the rollover direction is activated. Thereafter, when the time measured from the start of these operations reaches the set time T ₄ , the airbags 66 and 67 provided in front of the seat are operated. When the determination at S13 is no or the determination at S16 is yes, the closing operation means for the power windows 64 and 65 will not operate. However, if necessary, the closing of the power windows 64 and 65 is closed at S35 and S39. You may make it operate a side operation means.

With this configuration, when the vehicle is turning, when the alert level θ ₀ ≦ roll angle | θ | ≦ the rollover warning 2 level θ ₂ , the alert information is generated, so the driver avoids rollover. It is possible to take some measures (brake operation, accelerator operation, steering wheel operation) as much as possible. Roll angle | theta | when the ≧ rollover danger warning 2 levels theta _2, becomes the roll velocity theta '≧ rollover unavoidable level .theta.a, pretensioner of the seat belt 60, 61 along with generation of the alert information is activated (FIG. 15 and FIG. 16). Due to the operation of the pretensioner, the slack of the seat belts 60 and 61 is instantaneously wound, and the occupant is strongly bound to the seat. In other words, the amount of occupant movement to the side can be minimized.

Even after the pretensioner is activated, roll angular velocity θ ′ ≧ rolling inevitable level θ _b ′, roll angular velocity θ ′ ≧ rolling inevitable level θ _c ′, roll angular velocity θ ′ ≧ rolling inevitable level θ _d ′ are sequentially determined, If the roll angular velocity θ ′ becomes excessive and rollover inevitable is predicted, the airbag 62a or 62b, 63a or 63b immediately inflates, and then the airbags 66 and 67 also inflate, so that during rollover (see FIG. 13). The cushion function that protects the occupant from impact can be ensured without delay.

When roll angular velocity θ '<roll unavoidable level θ _a ' or roll angular velocity θ '<roll unavoidable level θ _b ' or roll angular velocity θ '≥ roll unavoidable level θ _c ' or roll angular velocity θ '≥ roll unavoidable level θ _d ' Is based on the degree of the roll angle | θ | and the duration T exceeding the specific level, the pretensioner of the seat belts 60 and 61, the closing side operation means of the power windows 64 and 65, the airbag 62a or 62b, 63a or Since the gas generating device 63b and the gas generating devices of the air bags 66 and 67 are sequentially operated, the possibility that these air bags are operated without necessity can be reduced. This is because in a roll state in which the roll angle | θ | is gradually increased, the roll angle | θ |

The reference value for determining the degree of the roll angular velocity θ ′ is the roll inevitable level θ _a '> the roll inevitable level θ _b '> the roll inevitable level θ _c '<the roll inevitable level θ _d '. It is also conceivable to set the relationship θ _a '= rolling inevitable level θ _b ' = rolling inevitable level θ _c '= rolling inevitable level θ _d '.

  Unlike the existing airbags 62a, 62b, 63a, 63b, 66, and 67, the airbags 62a, 62b, 63a, 63b, 66, and 67 are equipped with a plug that closes the vent hole. The cushion function can be maintained for a long time. FIG. 8 is a flowchart for explaining the control contents of the occupant protection cancellation determination means 61. In S41, it is determined whether the airbag 62a or 62b, 63a or 63b, 66, 67 has been activated. In S42, it is determined whether the release switch 70 is ON. If the determination in S41 is yes and the determination in S42 is yes, the process proceeds to S43, and a process of opening the plugs of the vent holes of the airbags 62a or 62b, 63a or 63b, 66, 67 is performed.

  Thus, after the rollover, the inflatable airbag 62a or 62b, 63a or 63b, 66, 67 can eliminate the state in which the occupant cannot move and can easily escape from the cab. The control object of the occupant protection release determination means 61 may be only the airbags 66 and 67 installed in front of the seat. When the release switch 70 is interlocked with the unlocking operation of the seat belts 60 and 61, the seat belt 60 , 61, the occupant protection release operation can be performed easily and easily.

  FIG. 16 illustrates an embodiment in which a side armrest 80 of a seat is applied instead of the airbags 62a, 62b, 63a, 63b. The side armrest 80 is changed from a use state to a retracted state or vice versa according to a switch operation. A drive mechanism for displacing is provided. The drive mechanism is controlled by the control unit 50a in the same manner as the airbags 62a, 62b, 63a, 63b, and is set so as to hold the side armrest 80 in use during rollover. Of course, the side armrest 80 can be used in combination with the airbags 62a, 62b, 63a, 63b.

It is a system outline figure concerning the embodiment of this invention. It is the functional block block diagram of a control unit similarly. It is explanatory drawing of a roll state similarly. It is explanatory drawing similarly regarding calculation of roll angle (theta). It is the schematic which similarly illustrates the layout of a protection means. It is a flowchart explaining the control content of a control unit similarly. It is a flowchart explaining the control content of a control unit similarly. It is a flowchart explaining the control content of a control unit similarly. It is explanatory drawing of a roll state similarly. It is explanatory drawing of a roll state similarly. It is explanatory drawing of a roll state similarly. It is explanatory drawing of a roll state similarly. It is explanatory drawing of a roll state similarly. It is explanatory drawing of a protection means similarly. It is explanatory drawing of a protection means similarly. It is principal part explanatory drawing which concerns on another embodiment.

Explanation of symbols

31 Vehicle height sensor 50, 50a Control unit 51 Roll angle calculating means 52 Roll over determining means based on roll angle 53 Roll angular speed calculating means 54 Roll over determining means based on roll angular speed 55 Control means for protecting means 61 Passenger protection release determining means 60, 61 Pretensioner type seat belts 62a, 62b, 63a, 63b Airbags on both sides of the seat 66,67 Airbags on the front of the seat 64,65 Power window 68 Warning information generating means 70 Release switch

Claims (5)

  Means for detecting the roll angle and roll angular velocity of the vehicle body in the device for protecting the occupant from the rollover of the vehicle, and when the roll angular velocity is higher than the inevitable rollover level, the seat belt pretensioner and the airbag installed on both sides of the seat Means for simultaneously operating the airbag located at the front side in the rollover direction, the airbag installed in front of the seat, and when the roll angular velocity is less than the roll inevitable level, based on the roll angle A seat belt pretensioner, an airbag located at least in front of the airbag in the roll-over direction, and an airbag installed in front of the seat, and a means for controlling the airbag to be operated sequentially. An occupant protection device for a vehicle, comprising:   When the roll angular velocity is less than the inevitable rollover level, the seatbelt pretensioner, the airbag located at the front of the rollover direction of the airbag installed on both sides of the seat, and the front of the seat are installed. As for the means for controlling the airbags to be operated sequentially, the means for operating the seat belt pretensioner when the continuation state where the roll angle is equal to or higher than the first determination level reaches a predetermined time, and the roll angle is the second Means for operating the closing operation means of the power window located on the front side in the rollover direction when the continuation state at or above the determination level reaches a predetermined time, and when the continuation state at the roll angle of the third determination level or more reaches the predetermined time Means for activating the airbag located on the front side of at least the rollover direction of the airbag installed on both sides of the seat, and whether the airbag is activated Occupant protection apparatus for a vehicle according to the description of claim 1, characterized in that it comprises a means for actuating the air bag predetermined time is equipped when passed in front of the seat.   The vehicle occupant protection device according to claim 1, wherein the airbag installed on both sides of the seat and the airbag installed in front of the seat do not have a vent hole.   The airbag installed in front of the seat includes a plug that closes the vent hole, and means for opening the vent hole by turning on a release switch arranged near the seat. 1. A vehicle occupant protection device according to item 1.   The vehicle occupant protection device according to claim 1, further comprising means for generating alert information for rollover during a time when the roll angle is equal to or greater than the alert level.

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