JP2011168134A - Occupant protection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively protect occupants seated in a vehicular sheet upon vehicle side collision or rolling. <P>SOLUTION: The occupant protection device includes: a seat belt device 2 with a webbing 7 composed of a shoulder belt 5 and a lap belt 6; a pressure mechanism for applying tension to the webbing 7 upon vehicle collision and pressing the webbing 7 against an occupant; a drive mechanism for moving at least the upper body of an occupant under a pressure state of the webbing to the inward side in the vehicle width direction; and a side air bag device 3 for deploying the side air bag 34 upon vehicle side collision. The occupant protection device is structured to enable an occupant to move to the outward side in the vehicle width direction by canceling a lock state of the webbing 7 with a lock mechanism installed on a retractor 8 when a predetermined time has elapsed after the operation of the drive mechanism and the side air bag device. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an occupant protection device including a seat belt device that restrains an occupant seated on a vehicle seat by webbing.

  Conventionally, as shown in Patent Document 1 below, a shoulder belt that restrains the chest from the shoulder portion of the occupant, and a lap belt that restrains the waist portion of the occupant, the tip of the lap belt is a first tip belt portion, Bifurcating into the second leading end belt portion, the first leading end belt portion is fixed to a driving device provided below the seat seat surface through the lower portion of the seat seat surface, and the second There is known a seat belt device in which a front end belt portion is fixed to a seat belt anchor provided on a side surface of a vehicle body.

  Further, as shown in Patent Document 2 below, seat belt means for restraining an occupant seated on a vehicle seat by webbing and inflating and deploying a side airbag between the occupant and the vehicle side portion protect the occupant. In the vehicle seat including the side airbag means, the seat belt means includes a pretensioner that pulls the webbing so as to increase the restraining force of the occupant by the webbing at the time of a side collision or rollover of the vehicle, and the seat belt In a state where the means pulls the webbing with a pretensioner to increase the occupant's restraining force, the occupant is protected by inflating and deploying the side airbag.

JP 2006-290259 A JP 2008-207764 A

  In the seat belt device disclosed in the above-mentioned Patent Document 1, at the time of a collision in which a load is applied from the side of the vehicle or at the time of a collision prediction, a part of the lap belt is driven by operating the driving device to drive a part of the lap belt. The occupant is protected from a side impact load by moving toward the center of the vehicle body. However, it is difficult to move the upper body of the occupant sufficiently to the center of the vehicle body only by driving a part of the lap belt, so that the occupant can be protected more effectively in the event of a side collision of the vehicle. It was hoped that.

  In the vehicle seat disclosed in Patent Document 2, the pretensioner is actuated when the vehicle collides or rolls over to increase the restraining force of the occupant by webbing, so that the occupant can be used as a seat bag and a seat cushion. On the other hand, the side airbag is configured to be deployed in a state of being restrained in a normal sitting posture. And, in a vehicle having a function of protecting the occupant by the side airbag or the like that is deployed at the time of a side collision of the vehicle, the protection function cannot be maximized, and at the time of a side collision of the vehicle, It has been difficult to effectively protect an occupant seated in a vehicle seat.

  The present invention has been made in view of the above-described problems, and provides an occupant protection device that can effectively protect an occupant seated on a vehicle seat when the vehicle is side- impacted or rolls over. The purpose is that.

  The invention according to claim 1 is a webbing having a shoulder belt that is slanted from the shoulder portion of the occupant seated on the vehicle seat to the waist portion, and a lap belt that extends in the vehicle width direction across the waist portion of the occupant. A retractor that supports one end of the webbing so that it can be wound, a lap anchor that fixes the other end of the webbing to the vehicle body, and a buckle that removably supports a tongue provided on the webbing. An occupant protection device comprising a seat belt device having a pressure-bonding mechanism that applies tension to the webbing and presses the webbing against the vehicle occupant in the event of a vehicle collision, and at least the upper body of the vehicle occupant in the vehicle width direction when the webbing is compressed When the impact load is input from the drive mechanism that drives the webbing to move the webbing to the inward side of the vehicle, Seat belt control means for controlling the drive mechanism to operate after the webbing is crimped to the occupant by operating the pressure-bonding mechanism, and seated on the vehicle seat when an impact load is input from the side of the vehicle A side airbag device that deploys a side airbag between the upper body of the occupant and the side wall of the passenger compartment, and is provided in the retractor when a predetermined time elapses after the drive mechanism and the side airbag device are operated. The webbing lock state by the provided locking mechanism is released to allow the occupant to move outward in the vehicle width direction.

  The invention according to claim 2 is the occupant protection device according to claim 1, wherein the drive mechanism drives the shoulder belt and lap belt to push the occupant inward in the vehicle width direction. Yes, when an impact load is input from the side of the vehicle, the seat belt control means operates the crimping mechanism to crimp the webbing to the occupant and then activates the driving mechanism, thereby causing the occupant to While maintaining the seating posture, it is moved inward in the vehicle width direction, and after the operation of the drive mechanism, first, the lap belt is locked by the lock mechanism provided in the lap anchor installation portion to release the lap belt. After gradually feeding out, the shoulder belt is unlocked by the lock mechanism provided on the retractor that supports the shoulder belt so that it can be wound. It is those that you have configured so that.

  According to a third aspect of the present invention, in the occupant protection device according to the first or second aspect of the invention, the timing for releasing the webbing lock state by the lock mechanism is controlled according to the load acting on the webbing in the event of a side collision of the vehicle. When the load acting on the webbing is large, the unlocking control means is provided so that the unlocking timing is advanced as compared with the case where the tension is small.

  According to a fourth aspect of the present invention, in the occupant protection device according to any one of the first to third aspects, when the load acting on the webbing is large during a side collision of the vehicle, the load is small. Thus, the webbing lock state by the lock mechanism is released at a higher speed.

  The invention according to claim 5 is the occupant protection device according to claim 3 or 4, further comprising load detecting means for detecting a load acting on the webbing.

  The invention according to claim 6 is the occupant protection device according to any one of claims 1 to 5, wherein the side airbag covers the shoulder to the waist of the seated occupant in its deployed state. It has been done.

  According to a seventh aspect of the present invention, in the occupant protection device according to the first aspect, the drive mechanism swings and displaces the upper body of the occupant so as to move the shoulder portion inward in the vehicle width direction. The webbing is driven, and when an impact load is input from a side portion of the vehicle, the seat belt control means operates the crimping mechanism to crimp the webbing to the occupant and then activates the driving mechanism. As a result, the upper body of the occupant is oscillated and displaced to drive the webbing so that the shoulder moves inward in the vehicle width direction. Install the lap anchor after releasing the shoulder belt locked by the locking mechanism provided on the retractor that can be supported and gradually feeding the shoulder belt. It is obtained by configured to unlock the lap belt by the lock mechanism provided.

  In the invention according to claim 1, the shoulder belt and the lap belt are appropriately crimped to the occupant by applying a predetermined tension to the webbing by operating the crimping mechanism at the time of a side collision or rollover of the vehicle. After restraining the occupant, the drive mechanism is operated to swing and displace the upper body of the occupant and push the shoulder inward in the vehicle width direction. The side airbag interferes with the occupant by operating the side airbag device and inflating and deploying the side airbag in a state where a predetermined gap is secured between the seated occupant and the side of the vehicle body. This is advantageous in that it is possible to effectively prevent passengers and to effectively protect the occupant when the vehicle collides or rolls over. And after the operation of the drive mechanism and the side airbag device, the locked state of the webbing by the lock mechanism provided in the retractor is released to allow the occupant to move outward in the vehicle width direction. Due to this configuration, when the vehicle side impacts or rolls over, the occupant is brought close to the deployed side airbag gradually, so that the occupant suddenly approaches the side with a strong force according to the inertial force acting on the occupant. There is an advantage that it can be prevented from being pressed against the airbag and the like, and an occupant seated on the vehicle seat can be effectively protected.

  In the invention according to claim 2, the occupant protection is configured such that the occupant is pushed inward in the vehicle width direction by driving the shoulder belt and the lap belt by operating the drive mechanism at the time of a side collision of the vehicle. In the apparatus, after the driving mechanism is operated, the shoulder portion of the occupant is restrained by the shoulder belt, and the locked state by the lock mechanism of the lap anchor is first released to release the waist restraint state by the lap belt, and then the shoulder Since the belt is configured to release the locked state, the occupant can move the waist and head to the outside in the vehicle width direction at the same time while maintaining a normal seating state. If it is possible to more effectively prevent the occupant from feeling uncomfortable by dispersing the pressing force when the occupant abuts on the shoulder and torso of the occupant Cormorants has the advantage.

  In the invention according to claim 3, the load acting on the webbing is large in the lock release control means for controlling the timing of releasing the webbing locked state by the lock mechanism according to the load acting on the webbing at the time of a side collision of the vehicle. In such a case, since the control is performed so that the unlocking timing is advanced as compared with the case where the tension is small, after the operation of the drive mechanism and the side airbag device, for example, when a large side impact load is applied. By moving the occupant outward in the vehicle width direction at an early stage, there is an advantage that it is possible to effectively prevent the occupant from being suddenly pressed against the side airbag or the like with a strong pressing force.

  The invention according to claim 4 is configured such that when the load acting on the webbing during a side collision of the vehicle is large, the speed at which the locked state of the webbing by the lock mechanism is released is faster than when the load is small. Therefore, after operating the drive mechanism and the side airbag device, for example, when a large side impact load is applied, the occupant is quickly moved to the outer side in the vehicle width direction so that the occupant is placed on the side airbag. There is an advantage that it is possible to more effectively prevent sudden pressing with a strong pressing force.

  In the invention according to claim 5, since the load detecting means for detecting the load acting on the webbing is provided, the occupant is moved outward in the vehicle width direction after the operation of the drive mechanism and the side airbag device with a simple configuration. By moving at an appropriate timing and speed, it is possible to effectively prevent the occupant from being suddenly pressed against the side airbag by a strong pressing force, and the occupant before the side airbag is sufficiently inflated. It is possible to appropriately prevent the occurrence of a situation in which the deployability of the side airbag is hindered due to the fact that the vehicle is allowed to move outward in the vehicle width direction.

  In the invention according to claim 6, since the side airbag is deployed, the side airbag can cover the shoulder to the waist of the occupant seated on the vehicle seat. Further, by deploying the side airbag, there is an advantage that an occupant can be effectively protected.

  In the invention according to claim 7, after the operation of the drive mechanism, first, by releasing the restraint state of the shoulder belt that holds the shoulder portion of the occupant, the upper body of the occupant in the tilted state is oscillated and displaced. After shifting to a normal sitting state that is almost upright according to the force, the waist is restrained by the lap belt, so the occupant's upper body is tilted out of the vehicle width direction in an unnatural state It is possible to move the waist and head of the occupant outward in the vehicle width direction at the same time while preventing the passenger from feeling uncomfortable by moving to the side, so that the occupant contacts the side airbag. There is an advantage that the occupant can be effectively protected in a state in which the pressing force at the time is distributed to the occupant's shoulder and torso.

1 is a front view showing a first embodiment of an occupant protection device according to the present invention. It is a side view which shows 1st Embodiment of the said passenger | crew protection apparatus. It is sectional drawing which shows the specific structure of a retractor. It is a disassembled sectional view which shows the specific structure of the installation part of a lap anchor. It is explanatory drawing which shows the operating state of the locking mechanism provided in the lap anchor. It is explanatory drawing which shows the specific structure of a 2nd pretensioner mechanism. It is a plane sectional view showing the concrete composition of a side airbag device. It is a block diagram which shows the specific structure of a control unit. It is a time chart which shows the effect | action of the passenger | crew protection device in 1st Embodiment of this invention. It is an operation | movement image figure which shows the effect | action of the said passenger | crew protection apparatus. It is a front view which shows 2nd Embodiment of the passenger | crew protection apparatus which concerns on this invention. It is a front view showing a 3rd embodiment of a crew member protection device concerning the present invention. It is a front view which shows the specific structure of the locking mechanism provided in the lap anchor. It is a side view which shows the specific structure of the said sending mechanism. It is a time chart which shows the effect | action of the passenger | crew protection device in 3rd Embodiment of this invention. It is an operation | movement image figure which shows the effect | action of the said passenger | crew protection apparatus.

  1 and 2 show a first embodiment of an occupant protection device according to the present invention. The occupant protection device includes a seat belt device 2 that protects an occupant seated on the vehicle seat 1 and a side impact load of the vehicle on the occupant seated on the vehicle seat 1 when an impact load is input from the side of the vehicle. A side airbag device 3 that protects from the above, and a control unit 4 to be described later that controls the side airbag device 3 and the seat belt device 2.

  The seat belt device 2 includes a webbing 7 including a shoulder belt 5 that is slanted from a passenger's shoulder to a waist and a lap belt 6 that is installed to extend in the vehicle width direction across the waist of the passenger, and the webbing. A retractor 8 that supports one end of the webbing 7 so that it can be wound, a lap anchor 9 that fixes the other end of the webbing 7 to the vehicle body, and a tongue 10 slidably provided along the webbing 7 are attached and detached. This is a three-point seat belt mechanism having a buckle 11 that can be locked.

  The retractor 8 is disposed on the outer side of the vehicle seat 1 in the vehicle width direction, and is fixed to a lower portion of the center pillar CP positioned behind the vehicle seat 1. Further, as shown in FIG. 3, the retractor 8 includes a first pretensioner mechanism 12 for applying a predetermined tension to the webbing 7 and crimping the webbing 7 to an occupant in the event of a vehicle collision. A load detecting means 13 comprising a tension sensor for detecting the load acting on the webbing 7 by detecting the tension of the shoulder belt 5 at the time of a vehicle collision, and the shoulder belt 5 by restraining the shoulder belt 5 at the time of a vehicle collision. And a lock mechanism 14 for restricting the pulling out of the retractor 8.

  The first pretensioner mechanism 12 includes a pinion gear 16 attached to a rotary shaft so as to rotate integrally with a take-up reel 15 that winds up the webbing 7, a rack gear 17 that rotationally drives the pinion gear 16, and the And an inflator 18 for driving the rack gear 17. Then, when a frontal or rearward collision of the vehicle is confirmed by a collision sensor provided on the vehicle body, or when an impact load is input from the side of the vehicle, etc., according to the gas pressure supplied from the inflator 18, By moving the rack gear 17 from the lower standby position to the upper drive position and rotationally driving the pinion gear 16, the shoulder belt 5 is rapidly wound and the webbing 7 is pressed against the occupant.

  The lock mechanism 14 of the retractor 8 has a pair of locking members 14a and 14b arranged opposite to each other with the shoulder belt 5 interposed therebetween, and is suddenly pulled on the shoulder belt 5 at the time of a frontal collision of the vehicle. When the output acts, the shoulder belt 5 is clamped by the locking members 14a and 14b to prevent the shoulder belt 5 from being pulled out suddenly. When it is confirmed that an abrupt pulling force is applied to the shoulder belt 5 according to the output signal of the load detecting means 13, an operation command signal is output to the driving portions of the locking members 14a and 14b. By reducing the holding force of the shoulder belt 5, the shoulder belt 5 has a function of allowing the shoulder belt 5 to be pulled out of the retractor 8 and relaxing the restraining force applied to the occupant from the shoulder belt 5. is doing.

  Further, the lock mechanism 14 of the retractor 8 is in accordance with the tension applied to the shoulder belt 5 when the drive mechanism including the second pretensioner mechanism 28 provided in the installation portion of the buckle 11 as described later. By outputting an operation command signal to the drive portions of the locking members 14a and 14b to weaken the holding force of the shoulder belt 5, the shoulder belt 5 is allowed to be pulled out from the retractor 8, and the shoulder is crimped to the occupant. A pull-out mechanism that allows the shoulder belt 5 to be pulled out from the retractor 8 while maintaining the pressure-bonding force of the belt 5 is configured.

  That is, when the lock mechanism 14 is allowed to be pulled out of the shoulder belt 5, the amount of the shoulder belt 5 pulled out from the retractor 8 is pulled downward in accordance with the operation of the second pretensioner mechanism 28. A value corresponding to a tensile amount of 5 is set. As a result, the shoulder belt 5 stretched obliquely along the waist from the occupant's shoulder is pulled diagonally inward and downward while the pressure of the shoulder belt 5 against the occupant is maintained at a substantially constant value. It has become.

  Furthermore, when it is confirmed in a later-described seat belt control means 40 provided in the control unit 4 that a predetermined time has elapsed after the operation of the drive mechanism including the second pretensioner mechanism 28 as described later, The shoulder belt 5 is released from the locked state by the lock mechanism 14 provided in the retractor 8 and the holding force thereof is further weakened, so that the occupant's shoulder portion is adjusted to the vehicle width according to the inertial force at the time of a side collision. The lock mechanism 14 is configured as a movement allowance means for allowing movement outward in the direction.

  The shoulder belt 5 drawn upward from the retractor 8 is slidably supported by a shoulder anchor 19 provided on the upper portion of the center pillar CP. And the lap anchor 9 which latches the other end part of the said webbing 7 is being fixed to the side wall surface etc. of the side sill SS in the vehicle width direction outer side of the vehicle seat 1. FIG. A support member 21 that supports the lap anchor 9 is attached to the side wall surface of the side sill SS.

  As shown in FIGS. 4 and 5, the support member 21 is slidably supported by inserting a lap anchor 9 formed of a cylindrical body to which the base end portion of the lap belt 6 is connected. The first holding cylinder 22, the second holding cylinder 23 into which the first holding cylinder 22 is inserted to rotatably support the first holding cylinder 22, and the protrusion 9a protruding from the lap anchor 9 are engaged. It has a locking member 24 that removably locks, and driving means 25 that rotationally drives the first holding cylinder 23.

  The first holding cylinder 22 is formed with a guide groove 26 that slidably supports a protrusion 9 a protruding from the lap anchor 9. The lap anchor 9 is configured to be inserted into the first holding cylinder 22 in a state where the protrusion 9 a is inserted through the guide groove 26 of the first holding cylinder 22. The second holding cylinder 23 is formed with a guide groove 27 through which the protrusion 9 a is inserted, and the lap anchor 9 and the first holding cylinder 22 are inserted into the second holding cylinder 23. ing.

  The guide groove 26 of the first holding cylinder 22 is connected to a first groove part 26a that extends upward from the lower end part of the first holding cylinder 22 along the axial direction thereof, and an upper end part of the first groove part 26a. A second groove portion 26b extending in the circumferential direction of the first holding cylinder 22 and a third groove extending upward while being inclined at a constant angle with respect to the axial direction of the first holding cylinder 22 and connected to the second groove portion 26b. It consists of a groove part 26c. On the other hand, the guide groove 27 of the second holding cylinder 23 is formed by a single groove portion extending in the vertical direction along the axial direction of the second holding cylinder 22.

  The locking member 24 is composed of a solenoid actuator that drives the locking bar 24a in and out in response to a control signal output from the seat belt control means 40 of the control unit 4. As shown in FIG. The front end of the locking bar 24a protrudes from the case of the solenoid actuator, and the protrusion 9a is locked to the rear end of the guide groove 26, whereby the lap anchor 9 is engaged with the first holding cylinder 22. It has a function as a first lock mechanism configured to stop and restrict the sliding of the lap anchor 9 and to release the locked state of the first holding cylinder 22 at a predetermined timing. .

  That is, when an unlocking signal is output from the seat belt control means 40 to the locking member 24, the base end portion of the locking bar 24a is placed in the case of the locking member 24 as shown in FIG. It is pulled in and the locked state of the projection 9a is released. As a result, when the driving mechanism including the second pretensioner mechanism 28 provided in the installation portion of the buckle 11 is operated, the protrusion 9a protruding from the lap anchor 9 extends along the first groove portion 26a of the guide groove 26. The lower end of the lap belt 6 that restrains the waist of the occupant seated on the vehicle seat 1 is sent upward.

  The amount of movement of the lap anchor 9 that moves upward when the first locking mechanism including the locking member 24 and the like is in the unlocked state of the lap anchor 9 depends on the operation of the second pretensioner mechanism 28. It is set to a value corresponding to the pulling amount of the lap belt 6 pulled downward. Accordingly, the lap belt 6 that restrains the occupant's waist is pulled inward in the vehicle width direction while the pressure-bonding force of the lap belt 6 against the occupant is maintained at a substantially constant value.

  The driving means 25 of the support member 21 is composed of a worm gear driving mechanism for rotating the first holding cylinder 22 and the like, after the operation of the driving mechanism including the second pretensioner mechanism 28, and the retractor 8 At a predetermined timing before releasing the restraint of the shoulder belt 5 by the lock mechanism 14 provided on the lap anchor 9, the projection 9 a protruding from the lap anchor 9 is released from the locked state, so that the projection 9 a is guided into the guide groove 26. A function as a second lock mechanism that is configured to be slidable along the third groove portion 26c and to be able to release the locked state of the lap belt 6 that restrains the waist of the occupant seated on the vehicle seat 1 as necessary. have.

  That is, as shown in FIG. 5B, the first holding cylinder 22 is rotationally driven through the driving means 25 in a state where the projection 9a of the lap anchor 9 is locked to the second groove 26b, By sliding the second groove portion 26b along the protrusion 9a, the protrusion 9a is relatively moved to a position corresponding to the rear end portion of the third groove portion 26c. In this state, when the first holding cylinder 22 is further rotationally driven by the driving means 25, as shown in FIG. 5C, the lap anchor 9 and the projection 9a slide upward along the third groove portion 26b. Is allowed to do. As a result, the lap belt 6 that restrains the lumbar portion of the occupant seated on the vehicle seat 1 is sent out inward in the vehicle width direction in response to the load acting on the lap belt 6, thereby restraining the occupant. The state will be released.

  The timing at which the second locking mechanism including the driving means 25 and the like is in the unlocked state of the lap belt 6 is the load acting on the lap belt 6 by the unlocking control means 40a described later provided in the seat belt control means 40. It is comprised so that it may be controlled according to. Specifically, when the load acting on the lap belt 6 is large, the timing for releasing the locked state of the lap belt 6 by the second lock mechanism is set earlier than when the load is small. ing.

  Further, when the load acting on the lap belt 6 at the time of a side collision of the vehicle is large, the speed at which the lap belt 6 is unlocked by the second lock mechanism compared to when the load is small, specifically, The first holding cylinder 22 is configured to increase the rotation speed. By setting the lock release timing and the release speed of the lap belt 6 in this way, the occupant seated on the vehicle seat 1 after the side airbag 34 of the side airbag device 3 is deployed as will be described later. The wrap belt 6 that restrains the vehicle is gradually loosened so that the occupant can maintain the normal seating posture while the occupant moves outward in the vehicle width direction according to the inertial force that acts when the vehicle collides. It is configured to allow movement.

  Instead of the first embodiment in which the second locking mechanism is configured by the driving means 25 having a worm gear driving mechanism or the like that rotationally drives the first holding cylinder 22, the same as the locking mechanism 14 of the retractor 8. The lap belt 6 is detachably constrained by a pair of locking members arranged with the lap belt 6 interposed therebetween, or the cylindrical lap anchor 9 is held and the holding force can be adjusted. By configuring as above, the restraining force by the lap belt 6 may be gradually released as necessary.

  The buckle 11 to which the tongue 10 provided on the webbing 7 is locked is supported on the inner side in the vehicle width direction of the vehicle seat 1 by the second pretensioner mechanism 28 installed on the floor panel FP. (See FIG. 1). As shown in FIG. 6, the second pretensioner mechanism 28 includes an inflator 29 that generates a large amount of combustion gas in response to a control signal output from the seat belt control means 40 of the control unit 4 described below, and the inflator 29 It has a cylinder 30 into which the generated combustion gas flows, a piston (not shown) disposed in the cylinder 30, and a wire member 31 having a base end connected to the piston.

  The wire member 31 is wound around a pulley 32 rotatably supported by the casing of the second pretensioner mechanism 28, and a lead-out portion led upward from the pulley 32 is attached to a pin 33 provided on the buckle 11. It is supported. When a gunpowder (not shown) housed in the inflator 29 is ignited and burned according to the control signal of the seat belt control means 40, the piston moves in the cylinder 30 according to the gas pressure. The tongue 10 and the buckle 11 are configured to be pulled down via the wire member 31.

  Then, by pulling the boundary portion between the shoulder belt 5 and the lap belt 6 downward according to the urging force, the occupant seated on the vehicle seat 1 via the shoulder belt 5 and the lap belt 6 can be moved in the vehicle width direction. A drive mechanism that pushes inward is constituted by the second pretensioner mechanism 28. That is, when the second pretensioner mechanism 28 is in an operating state at the time of a side collision of the vehicle, the shoulder belt 5 that is slanted from the shoulder portion of the occupant to the waist portion is pulled obliquely inward and downward, The lap belt 6 installed so as to extend in the vehicle width direction across the occupant's waist is pulled inward in the vehicle width direction so that the occupant is pushed inward in the vehicle width direction. It has become.

  As shown in FIGS. 2 and 7, the side airbag device 3 is inflated between the occupant seated on the vehicle seat 1 and the side wall of the passenger compartment so as to cover the waist from the shoulder of the occupant. The vehicle includes a side airbag 34 that is deployed and an inflator 35 that supplies combustion gas for inflating the side airbag 34, and the side airbag 34 is folded and unitized with the inflator 35. The seat 1 is accommodated in a recess 36 a formed in the seat bag 36. The concave portion 36a is formed on the outer side in the vehicle width direction of the seat bag 36, and a slit S is formed on the front surface portion thereof, and the side airbag 34 expands and deforms the slit S to form a seat. The bag 36 is deployed to the front side.

  As shown in FIG. 8, the control unit 4 includes an impact detection means 39 for detecting an input of an impact load to the side of the vehicle based on an output signal of a side collision sensor 37 or a rollover sensor 38 provided on the vehicle body, A seat belt that outputs an operation command signal to the first and second pretensioner mechanisms 12, 28, the lock mechanism 14, the locking member 24, the driving means 25, and the like of the seat belt device 2 at a predetermined timing according to the detection result. Control means 40 and airbag control means 41 for outputting an operation command signal to the inflator 35 of the side airbag device 3 at a predetermined timing according to the detection result of the impact detection means 39 are provided. The seat belt control means 40 is provided with a lock release control means 40a for controlling the restraint release timing and the release speed of the lap belt 6.

  The control operation executed in the control unit 4 will be described based on the time chart shown in FIG. 9 and the operation image diagram shown in FIG. 9A to 9C show a change state of the reaction force acting on the retractor 8, the lap anchor 9 and the buckle 11 in accordance with the tension applied to the webbing 7. FIG. d) shows a supply state of combustion gas to the side airbag 34. When the impact detection means 39 detects that an impact load has been input from the side of the vehicle, at this time t1, the seat belt control means 40 applies to the first pretensioner mechanism 12 provided in the retractor 8. An operation command signal A is output, and an operation command signal B is output from the airbag control means 41 to the inflator 35 of the side airbag device 3.

  Then, when the first pretensioner mechanism 12 of the retractor 8 is activated according to the operation command signal A output at the time t1, the webbing 7 is moved to the retractor 8 as shown in FIG. The pulling force H1 in the pulling direction acts on the webbing 7, a predetermined tension is applied to the webbing 7, and the shoulder belt 5 and the lap belt 6 are pressed against the chest and waist of the occupant, respectively. At the time t1, the inflator 35 of the side airbag device 3 is activated in response to the operation command signal B, so that supply of combustion gas to the side airbag 34 is started and the side airbag 34 is inflated. Begin to.

  Provided in the installation portion of the buckle 11 at the time t2 when the webbing 7 is completely crimped to the occupant, for example, after a predetermined time has elapsed after the operation of the crimping means comprising the first pretensioner mechanism 12 provided in the retractor 8. The operation command signal C is output from the seat belt control means 40 to the second pretensioner mechanism 28, and the locking mechanism 14 provided in the retractor 8 and the locking member 24 provided in the lap anchor 9 are operated. Command signals D and E are output, respectively.

  When the second pretensioner mechanism 28 is activated according to the operation command signal C output at the time point 2, the tongue 10 provided on the webbing 7 is pulled downward as shown in FIG. 10B. A predetermined tensile force H2 is applied, and the shoulder belt 5 stretched obliquely downward along the waist from the occupant's shoulder is pulled downward inward and the vehicle width along the occupant's waist. The lap belt 6 installed so as to extend in the direction is pulled inward in the vehicle width direction.

  Further, at the time point 2, the shoulder belt 5 is released from the retractor 8 by the unlocking of the shoulder belt 5 by the retractor 8 in accordance with the operation command signal D output from the seat belt control means 40 to the locking mechanism 14. The belt 5 is allowed to be pulled out, and the lap anchor 9 of the first lock mechanism including the locking member 24 and the like according to the operation command signal E output from the seat belt control means 40 to the locking member 24 is used. When the locked state is released, the lower end portion of the lap anchor 9 moves upward, and the lap belt 6 that restrains the occupant's waist corresponding to the lap anchor 9 is sent out inward in the vehicle width direction. It will be.

  As a result, when the second pretensioner mechanism 28 provided on the buckle 11 is operated, the shoulder belt 5 and the lap belt 6 that are crimped to the occupant are maintained at a constant value in a state where the crimping force is maintained. 5 is pulled diagonally inward and downward along the waist from the occupant's shoulder, and the lap belt 6 is pulled inward in the vehicle width direction. As a result, as shown in FIG. Thus, a predetermined pushing force H3 for pushing the occupant seated on 1 inward in the vehicle width direction is applied.

  The capacity of the side airbag 34 and the side airbag device 3 are set so that the inflation and deployment of the side airbag 34 is completed at a time t3 when a predetermined time has elapsed from the output time of the command signals C to E. A supply speed of the combustion gas supplied from the inflator 35 to the side airbag 34 is set.

  In addition, it is locked to the second lock mechanism including the driving means 25 provided in the installation portion of the lap anchor 9 immediately before the time t3, or just before the inflation and deployment of the side airbag 34 is finished or just after the inflation and deployment. A release signal F is output, and the restraining force of the occupant by the lap belt 6 is gradually relaxed at a timing and speed corresponding to the load detected by the load detecting means 13. As a result, as shown in FIG. 10 (d), the inertial force K acting on the occupant corresponding to the side impact load J input at the time of a side collision of the vehicle, that is, the occupant is relatively moved outward in the vehicle width direction. In accordance with the force to be moved, the occupant's lower back seated on the vehicle seat 1 is allowed to move outward in the vehicle width direction.

  Further, at a time point 4 when a predetermined time elapses after the unlock signal is output to the second lock mechanism, a control signal G for releasing the locked state of the shoulder belt 5 is issued to the lock mechanism 14 provided in the retractor 8. The shoulder belt 5 is pulled out from the retractor 8, and the restraining force of the occupant by the shoulder belt 5 is relaxed. As a result, as shown in FIG. 10E, the inertial force K acting on the occupant corresponding to the side collision load J acting at the time of a side collision of the vehicle, that is, the occupant is relatively moved in the vehicle width direction. Depending on the force, the shoulder and head of the occupant seated on the vehicle seat 1 are allowed to move outward in the vehicle width direction.

  A webbing 7 comprising a shoulder belt 5 that is slanted from the shoulder part of the occupant seated on the vehicle seat 1 to the waist part as described above, and a lap belt 6 that is installed so as to extend in the vehicle width direction across the waist part of the occupant. A retractor 8 that supports one end of the webbing 7 so that it can be wound, a lap anchor 9 that fixes the other end of the webbing 7 to the vehicle body, and a tongue 10 provided on the webbing 7 can be engaged and disengaged. In the occupant protection device having a seat belt device 2 having a buckle 11 supported on the vehicle, a pressure is formed of a first pretensioner mechanism 12 that applies tension to the webbing 7 to cause the webbing 7 to be crimped to the occupant during a vehicle collision. Mechanism and a second pretensioner that drives the shoulder belt 5 and the lap belt 6 to push the occupant inward in the vehicle width direction When an impact load is input from the side of the vehicle, the first pretensioner mechanism 12 is operated to press the webbing 7 against the passenger, and then the second pretensioner mechanism 28 is operated. And a side airbag device 3 for deploying the side airbag 34 between the upper body of the occupant seated on the vehicle seat 1 and the side wall of the passenger compartment. In addition, when a predetermined time has elapsed after the operation of the drive mechanism and the side airbag device 3, the webbing lock state by the lock mechanism provided in the retractor 8 is released, and the occupant moves outward in the vehicle width direction. Since it is configured to allow movement, it is possible to effectively protect an occupant seated on the vehicle seat 1 when the vehicle collides or rolls over. There is an advantage that it can be.

  That is, in the first embodiment, the retractor 8 is disposed on the outer side of the vehicle seat in the vehicle width direction, and the crimping mechanism is configured by the first pretensioner mechanism 12 provided on the retractor 8. The first pretensioner mechanism 12 is actuated when the vehicle collides or rolls over, so that one end of the webbing 7 is pulled into the retractor 8 and a predetermined tension is applied to the webbing 7. Since it comprised so, the said passenger | crew can be restrained by crimping | bonding the said shoulder belt 5 and the lap belt 6 appropriately to a passenger | crew, respectively. In addition, the first pretensioner mechanism 12 is provided to protect the occupant from a collision load acting on the vehicle by pressing the webbing 7 against the occupant and restraining the occupant at the time of the front collision or the rear collision of the vehicle. Can be used to apply tension to the webbing 7 to cause the webbing 7 to be pressure-bonded to the occupant during a side collision or rollover of the vehicle, thereby effectively simplifying the structure of the seat belt device 2. There is also an advantage.

  A buckle 11 to which the tongue 10 is locked is disposed on the inner side in the vehicle width direction of the vehicle seat 1, and the drive mechanism is moved by a second pretensioner mechanism 28 that pulls the buckle 11 downward. And the shoulder belt 5 that is crimped to the occupant by operating the second pretensioner mechanism 28 at a predetermined timing after the operation of the first pretensioner mechanism 12 and pulling the tongue 10 and the buckle 11 downward. Since the lap belt 6 is urged toward the inner side in the vehicle width direction, the occupant seated on the vehicle seat 1 can be actively moved toward the inner side of the vehicle body by a predetermined distance. . For example, by pulling the tongue provided on the webbing 7 downward by about 100 mm, the shoulder belt 5 and the lap belt 6 are each pulled inward by about 50 mm in the vehicle width direction. It moves to the inner side of the vehicle body by 50 mm. Therefore, when a side collision of the vehicle or a rollover occurs, a predetermined gap is secured between the occupant seated on the vehicle seat 1 and the side of the vehicle body, so that the impact load input from the side of the vehicle is reduced. The passenger can be effectively prevented from reaching the passenger and can be protected.

  Moreover, in the said 1st Embodiment, when operating the drive mechanism which consists of the 2nd pretensioner mechanism 28 provided in the installation part of the buckle 11, the crimping force of the shoulder belt 5 crimped | bonded to the passenger | crew is made into a substantially constant value. Since the retractor 8 including the lock mechanism 14 and the like that allows the shoulder belt 5 to be pulled out from the retractor 8 while being maintained is provided in the retractor 8, the retractor 8 and the second pretensioner mechanism 28 By applying the urging force to the shoulder belt 5 at the same time, it is possible to effectively prevent the passenger from feeling uncomfortable due to an excessive restraining force acting on the passenger from the shoulder belt 5. In addition, it is possible to effectively prevent the occurrence of a situation in which the driving force of the shoulder belt 5 by the driving mechanism including the second pretensioner mechanism 28 is reduced according to the tensile force of the retractor 8, and the like. The shoulder belt 5 can be appropriately driven by the pretensioner mechanism 28 to positively move the occupant toward the inward side of the vehicle body.

  In particular, when the second pretensioner mechanism 28 is operated, the lap belt 6 is released from being locked by the locking member 24 (first locking mechanism) formed of a solenoid actuator provided at the installation portion of the lap anchor 9 to release the lap belt. In the case where it is configured to allow the belt 6 to be fed inward in the vehicle width direction, the urging force of the second pretensioner mechanism 28 is applied to the lap belt 6 while the end portion of the lap belt 6 is fixed. The driving force of the second pretensioner mechanism 28 while effectively preventing the passenger from feeling uncomfortable due to the excessive pressure applied to the passenger from the lap belt 6 due to being applied to the passenger. Accordingly, there is an advantage that the lap belt 6 can be appropriately driven to push the occupant inward in the vehicle width direction.

  When the impact load is input from the side of the vehicle as described above, the second pretensioner mechanism is operated after the webbing 7 is crimped to the occupant by operating the crimping mechanism including the first pretensioner mechanism 12. The side airbag device 3 is operated and the side airbag is operated in a state where the occupant is pushed inward in the vehicle width direction by driving the shoulder belt 5 and the lap belt 6 by operating the drive mechanism comprising 28. By inflating and deploying 34, the side airbag 34 can be effectively prevented from interfering with the occupant. Therefore, there is an advantage that the occupant can be effectively protected by appropriately inflating and deploying the side airbag 34 at the time of a side collision or rollover of the vehicle.

  Then, after the operation of the drive mechanism including the second pretensioner mechanism 28 and the side airbag device 3, the webbing 7 by the lock mechanism provided in the retractor 8 at a time point 4 after the operation of the drive mechanism has elapsed. Since the configuration is such that the (shoulder belt 5) is unlocked and the occupant is allowed to move outward in the width direction of the vehicle, the side that is in the unfolded state when the vehicle side impacts or rolls over, etc. By effectively bringing an occupant close to the air bag 34, the occupant seated on the vehicle seat 1 is effectively protected by preventing the air bag 34 from being pressed against the side air bag 34 by reaction according to the inertial force acting on the occupant. Can do.

  That is, even if the occupant is restrained inward in the vehicle width direction by the webbing 7 even after the side airbag 34 is in the deployed state, the restraint force of the occupant by the webbing 7 is greater than the restraining force of the occupant. When the inertial force K that attempts to move the occupant outward in the vehicle width direction increases, the occupant suddenly moves outward in the vehicle width direction and is pressed against the side airbag 34. , Get a strong sense of incongruity. For this reason, after deployment of the side airbag 34, the restraint of the occupant by the webbing 7 is released at an early stage, and the occupant presses against the side airbag 34 with a strong force according to the inertial force acting on the occupant. It is desirable to be able to protect the occupant using the side airbag 34 and the webbing 7 while preventing the occupant from being strongly discomforted.

  In the first embodiment, the shoulder belt 5 and the lap belt 6 are driven by the driving mechanism including the second pretensioner mechanism 28 to push the occupant inward in the vehicle width direction. In the occupant protection device, when an impact load is input from the side of the vehicle, the vehicle width is maintained while maintaining the occupant in a normal seating posture by operating the drive mechanism with the webbing 7 being crimped to the occupant. At a predetermined time t3 after moving inward in the direction, the lap belt 6 is first unlocked by releasing the locked state of the lap belt 6 by the second locking mechanism comprising the driving means 25 provided in the installation portion of the lap anchor 9. The restraint of the occupant is gradually released, and the shoulder belt 5 is locked by the lock mechanism 14 provided on the retractor 8 at a predetermined time t4 thereafter. Therefore, after the driving mechanism and the side airbag device 3 are operated, the occupant can be moved outward in the vehicle width direction while maintaining a normal seating posture. There is an advantage that it is possible to prevent the occupant from being abruptly pressed by the strong force 34 and the contact occupant from feeling uncomfortable.

  In other words, the driving mechanism including the second pretensioner mechanism 28 is actuated to drive the shoulder belt 5 and the lap belt 6 at the time of a side collision of the vehicle, etc., so that the occupant is pushed inward in the vehicle width direction. In the constructed occupant protection device, according to the impact load J acting on the vehicle, an inertial force K that tends to move outward in the vehicle width direction on the shoulder and head of the occupant is stronger than the waist. Therefore, the head of the occupant may be suddenly pressed against a curtain airbag or the like deployed on the upper side wall of the vehicle body.

  However, after the operation of the drive mechanism as described above, while the shoulder portion of the occupant is restrained by the shoulder belt 5, the locked state by the lock mechanism of the lap anchor 9 is first released to release the restrained state of the waist by the lap belt 6. If the shoulder belt 5 is unlocked after that, the occupant can keep its waist, shoulder and head in the vehicle width direction substantially simultaneously while maintaining the normal seating state. It can be moved to the side. Accordingly, it is possible to disperse the pressing force when the occupant abuts on the side airbag 34 to the shoulder and the trunk of the occupant, thereby further effectively preventing the occupant from feeling uncomfortable. There are advantages.

  In the first embodiment, the webbing 7 is locked by the second locking mechanism (driving means 25) of the lap anchor 9 and the locking mechanism 14 of the retractor 8 according to the load acting on the webbing 7 at the time of a side collision of the vehicle. When the load acting on the webbing 7 is large, that is, when the inertial force acting on the occupant is large, the lock release control means 40a for controlling the timing for releasing the state is provided, compared with the case where the tension is small. Since the unlocking timing is made earlier, the occupant is moved outward in the vehicle width direction at an early stage after the operation of the drive mechanism and the side airbag device 3 when a large side impact load is applied. By moving, there is an advantage that it is possible to effectively prevent the occupant from being pressed against the side airbag 34 or the like with a strong pressing force. That.

  Furthermore, in the said 1st Embodiment, when the load which acts on the webbing 7 at the time of a side collision of a vehicle is large, the speed | rate which cancels | releases the locked state of the webbing 7 by the said lock mechanism is made faster compared with the case where this load is small. Thus, when the driving mechanism and the side airbag device 3 are actuated when a large side impact load is applied, the occupant is quickly moved outward in the vehicle width direction. There is an advantage that it is possible to more effectively prevent the occupant from being suddenly pressed against the bag 34 by a strong pressing force.

  In the first embodiment, the load acting on the webbing 7 is detected by the load detecting means 13 provided on the retractor 8, and the second lock mechanism (locking member) of the lap anchor 9 is detected according to the detected value. 24) and the example in which the timing and the release speed for releasing the webbing lock state by the lock mechanism 14 of the retractor 8 have been described, but instead of this configuration, the side collision sensor 37 or the rollover sensor 38 Based on the output signal, the impact detection means 39 for detecting the input of the impact load to the side portion of the vehicle detects the magnitude of the load acting on the vehicle body at the time of a side collision of the vehicle, and is installed in the vehicle seat 1. The weight of the seated occupant is detected by a pressure sensor or the like, and the load acting on the webbing 7 is indirectly detected based on these detected values. Rukoto is also possible.

  However, when the load detection means 13 for detecting the load acting on the webbing 7 is provided as shown in the first embodiment, the drive mechanism and the side airbag device 3 can be operated with a simple configuration. By moving the occupant to the outer side in the vehicle width direction at an appropriate timing and speed, it is possible to effectively prevent the occupant from being suddenly pressed against the side airbag 34 by a strong pressing force. Occurrence of a situation in which the deployability of the side airbag 34 is hindered by allowing the occupant to move outward in the vehicle width direction before the side airbag 34 is sufficiently inflated. Can be prevented appropriately.

  In the first embodiment, since the side airbag 34 is configured to cover the shoulder portion to the waist portion of the occupant seated on the vehicle seat 1 with the side airbag 34 in the deployed state, the side airbag 34 Further, by deploying the side airbag 34, it is possible to effectively protect the occupant. When the side airbag 34 is configured to cover from the shoulder to the waist of the occupant seated on the vehicle seat 1, the side airbag 34 is interposed between the occupant and the vehicle body side wall when deployed. As described above, the shoulder belt 5 and the lap belt 6 are driven by the drive mechanism including the second pretensioner mechanism 28 as described above to push the occupant inward in the vehicle width direction. Thus, the occupant can be protected more effectively.

  It should be noted that at the time of a frontal collision or a rearward collision of the vehicle, the first pretensioner mechanism 12 provided for restraining the occupant by pressing the webbing 7 against the occupant is used for a side collision or a rollover of the vehicle. Instead of the first embodiment in which a pressure-bonding mechanism is configured to apply tension to the webbing 7 to crimp the webbing 7 to the occupant, air is applied to the webbing 7 as in the second embodiment shown in FIG. The pressure-bonding mechanism may be configured by an air belt mechanism 42 that supplies and inflates the webbing 7.

  The air belt mechanism 42 according to the second embodiment includes an air pipe 43 connected to bag portions 5 a and 6 a provided on the shoulder belt 5 and the lap belt 6, and the bag portions 5 a and 6 a via the air pipe 43. And an inflator 44 for inflating the bag portions 5a and 6a by supplying combustion gas. When an impact load is input from the side of the vehicle, the inflator 44 is operated to inflate the bag portions 5a and 6a in accordance with the operation command signal output from the seat belt control means 40. The shoulder belt 5 and the lap belt 6 are each configured to be crimped to the occupant.

  According to the above configuration, the bag portions 5a and 6a are inflated at the time of a side collision or a rollover of the vehicle, and the shoulder belt 5 and the lap belt 6 are increased in area with respect to the occupant. Since the crimping can be performed properly, the occupant seated on the vehicle seat 1 can be moved more smoothly inward in the vehicle width direction by operating the drive mechanism including the second pretensioner mechanism 28. A gap for deploying the side airbag 34 can be effectively formed between the occupant and the side wall of the vehicle body.

  12 and 13 show a third embodiment of an occupant protection device according to the present invention. In the third embodiment, the webbing 7 is driven to move the upper body of the occupant inward in the vehicle width direction to the installation portion of the lap anchor 9 that locks the base end portion of the lap belt 6. A drive mechanism including a two pretensioner mechanism 45 is provided. As shown in FIG. 14, the second pretensioner mechanism 45 has the same configuration as the second pretensioner mechanism 28 shown in FIG. 6 except that the cylinder 30 is supported by a support member 46 so as to be movable back and forth. is doing. For this reason, the same code | symbol as each member of the said 2nd pretensioner mechanism 28 is attached | subjected to each member which comprises the said 2nd pretensioner mechanism 45, and the specific description is abbreviate | omitted.

  Further, the support member 46 supports the cylinder 30 of the second pretensioner mechanism 45 in place of the lap anchor 9 so as to be slidable from the first holding cylinder 22, and the first holding cylinder 22 and the like are mounted on the vehicle. Since it has the same structure as the support member 21 shown in FIGS. 4 and 5 except that it is installed in the front-rear direction, the structure of the support member 21 is included in each member constituting the support member 46. The same reference numerals as those of the members are attached, and the specific description thereof is omitted.

  Then, the upper body of the occupant seated on the vehicle seat 1 is oscillated and displaced in accordance with the pulling force applied to the lap belt 6 through the drive mechanism including the second pretensioner mechanism 45, and the shoulder portion is A drive mechanism that drives the webbing 7 to move inward in the width direction is constituted by the second pretensioner mechanism 28. That is, when the second pretensioner mechanism 45 is activated, the lap belt 6 installed so as to extend in the vehicle width direction across the occupant's waist is pulled outward in the vehicle width direction so that the occupant's waist is In addition to being pulled outward in the vehicle width direction, and correspondingly, the shoulder belt 5 stretched from the occupant's shoulder to the waist is pulled obliquely inward and downward, so that the upper body of the occupant swings and displaces. The shoulder of the lever is pushed inward in the vehicle width direction.

  In the third embodiment, as shown in FIG. 15, when the impact detection means 39 detects that the impact load J has been input from the side of the vehicle, the seat belt control means 40 at this time t1. The operation command signal A is output from the airbag control means 41 to the inflator 35 of the side airbag device 3 while the operation command signal A is output to the first pretensioner mechanism 12 provided in the retractor 8. Further, when the inflator 35 of the side airbag device 3 is activated according to the operation command signal B output at the time t1, the supply of the combustion gas to the side airbag 34 is started and the side airbag 34 is activated. Begins to expand.

  Then, when the first pretensioner mechanism 12 of the retractor 8 is activated according to the operation command signal A output at the time t1, the webbing 7 is moved to the retractor 8 as shown in FIG. When the pulling force H1 in the pulling direction is applied, a predetermined tension is applied to the webbing 7, and the shoulder belt 5 and the lap belt 6 are pressed against the chest and waist of the occupant, respectively.

  At the time t2 when the press of the webbing 7 to the occupant is completed due to the elapse of a predetermined time after the operation of the crimping means comprising the first pretensioner mechanism 12 provided in the retractor 8, the support portion of the lap anchor 9 is The operation command signal C is output from the seat belt control means 40 to the second pretensioner mechanism 45 provided, and the operation command signal D is output to the lock mechanism 14 provided in the retractor 8.

  When the second pretensioner mechanism 45 is activated in response to the operation command signal C output at the time point 2, the lap anchor provided at the other end of the webbing 7 as shown in FIG. A predetermined tensile force H2 that pulls 9 downward is applied, and in response to this, the lap belt 6 installed so as to extend in the vehicle width direction along the occupant's waist is pulled outward in the vehicle width direction, The shoulder belt 5 that is slanted from the occupant's shoulder along the waist is pulled obliquely inward and downward.

  Further, at the time point 2, the retractor 8 is released from the restraint of the shoulder belt 5 by the retractor 8 in response to the operation command signal D output from the seat belt control means 40 to the lock mechanism 14 of the retractor 8. The webbing 7 is allowed to be pulled out from As a result, when the second pretensioner mechanism 45 provided at the installation portion of the lap anchor 9 is operated, the crimping force of the shoulder belt 5 and the lap belt 6 crimped to the occupant is maintained at a constant value. Then, the shoulder belt 5 is pulled obliquely inward and downward along the waist from the occupant's shoulder, and the lap belt 6 is pulled outward in the vehicle width direction, and as shown in FIG. 16 (c). In addition, a predetermined pressing force H3 for swinging and displacing the upper body of the occupant seated on the vehicle seat 1 in the counterclockwise direction is applied.

  A control signal E for releasing the locked state of the shoulder belt 5 to the lock mechanism 14 provided in the retractor 8 immediately before the time t3 or just before the inflation and deployment of the side airbag 34 is finished or just after the inflation and deployment is finished. Is output, and as shown in FIG. 16 (d), the restraining force of the shoulder belt 5 that restrains the occupant's shoulder and the like is loosened. As a result, the vehicle is seated on the vehicle seat 1 in accordance with the inertial force K acting on the occupant corresponding to the side impact load J acting at the time of a side collision of the vehicle, that is, the force for moving the occupant relative to the vehicle width direction. When the head of the occupant is allowed to move outward in the vehicle width direction, the upper body of the occupant in a tilted state as shown in FIG. 16C is shown in FIG. Thus, it can return to a normal seating state, that is, a substantially upright seating state.

  Further, at a time point 4 when a predetermined time has elapsed after the unlocking signal is output to the locking mechanism 14 of the retractor 8, the second locking mechanism comprising the driving means 25 provided in the installation portion of the lap anchor 9 is applied. An unlock signal F is output, and the restraining force of the occupant by the lap belt 6 is relaxed at the timing and speed corresponding to the load detected by the load detecting means 13, as shown in FIG. As a result, the vehicle responds to the inertial force K acting on the occupant corresponding to the side impact load J input at the time of a side collision of the vehicle, that is, the force for moving the occupant relative to the outer side in the vehicle width direction. The occupant's lower back seated in the seat 1 is allowed to move outward in the vehicle width direction.

  A webbing 7 comprising a shoulder belt 5 that is slanted from the shoulder part of the occupant seated on the vehicle seat 1 to the waist part as described above, and a lap belt 6 that is installed so as to extend in the vehicle width direction across the waist part of the occupant. A retractor 8 that supports one end of the webbing 7 so that it can be wound, a lap anchor 9 that fixes the other end of the webbing 7 to the vehicle body, and a tongue 10 provided on the webbing 7 can be engaged and disengaged. In the occupant protection device including the seat belt device 2 having the buckle 11 supported on the side airbag device 3, the side airbag device 3 that deploys the side airbag 34 between the occupant and the passenger compartment side wall at the time of a side collision of the vehicle, A pressure-bonding mechanism comprising a first pretensioner mechanism 12 that applies tension to the webbing 7 at the time of collision and press-bonds the webbing 7 to the passenger; A driving mechanism comprising a second pretensioner mechanism 45 for driving the webbing 7 so as to move the shoulder part inwardly in the vehicle width direction by swinging and displacing the half body, and an impact load is input from the side part of the vehicle. Since the first pretensioner mechanism 12 is operated and the webbing 7 is pressure-bonded to the occupant, the seatbelt control means 40 is provided for controlling the second pretensioner mechanism 45 to operate. There is an advantage that an occupant seated on the vehicle seat 1 can be effectively protected during a side collision or rollover.

  That is, in the third embodiment, the retractor 8 is disposed on the outer side in the vehicle width direction of the vehicle seat, and the first pretensioner mechanism 12 provided on the retractor 8 constitutes the crimping mechanism. The first pretensioner mechanism 12 is actuated when the vehicle collides or rolls over, so that one end of the webbing 7 is pulled into the retractor 8 and a predetermined tension is applied to the webbing 7. Since it comprised so, the said passenger | crew can be restrained by crimping | bonding the said shoulder belt 5 and the lap belt 6 appropriately to a passenger | crew, respectively.

  And the 2nd pretensioner mechanism which arrange | positions the lap anchor 9 which fixes the other end part of the said webbing 7 to the vehicle body at the vehicle width direction outer side of the said vehicle seat 1 and pulls down this lap anchor 9 downwards If the drive mechanism is configured by 45 and the second pretensioner mechanism 45 is operated at a predetermined timing after the operation of the first pretensioner mechanism 12 to pull the lap anchor 9 downward by about 50 mm, for example, The lap belt 6 crimped to the passenger can be pulled outward by about 50 mm in the vehicle width direction. Further, as a result of the webbing 7 being supported by the tongue 10 while the shoulder belt 5 is pulled obliquely inward and downward by about 50 mm, the upper body of the occupant is moved without moving the center of gravity of the occupant in the vehicle width direction. By swinging and displacing in the counterclockwise direction of (c), the shoulder portion of the occupant can be positively moved inward in the vehicle width direction.

  Accordingly, when a side collision of the vehicle or a rollover occurs, an impact input from the side portion of the vehicle is secured by securing a sufficient gap between the shoulder portion of the occupant seated on the vehicle seat 1 and the side portion of the vehicle body. It is possible to effectively prevent the load from reaching the passenger and protect the passenger. When the side airbag device 3 is actuated to inflate and deploy the side airbag 34, the side airbag 34 interferes with the shoulder of the occupant and the inflated and deployed state is obstructed. By effectively inflating and deploying the side airbag 34 at the time of a side collision or rollover of the vehicle, the passenger can be effectively protected.

  Moreover, in the said 3rd Embodiment, when operating the drive mechanism which consists of the 2nd pretensioner mechanism 45 provided in the lap anchor 9, maintaining the crimping | compression-bonding force of the webbing 7 crimped | bonded to the passenger | crew at the substantially constant value. Since the retractor 8 is provided with a pull-out mechanism including the lock mechanism 14 that allows the webbing 7 to be pulled out of the retractor 8, the urging force of the retractor 8 and the second pretensioner mechanism 28 is increased. At the same time, it is possible to effectively prevent the occupant from feeling uncomfortable due to excessive restraining force acting on the occupant due to being applied to the webbing 7. In addition, the second pretensioner mechanism 28 effectively prevents the occurrence of a situation in which the driving force of the webbing 7 by the second pretensioner mechanism 28 is attenuated according to the pulling force of the retractor 8. There is an advantage that the webbing 7 can be driven properly.

  And when the impact load is input from the side of a vehicle as mentioned above, the side airbag apparatus 3 which expands the side airbag 34 between the passenger | crew seated in the vehicle seat 1 and the side wall of a compartment is provided. In the vehicle, the upper body of the occupant seated on the vehicle seat 1 is swung by driving the shoulder belt 5 and the lap belt 6 by the drive mechanism including the second pretensioner mechanism 45 provided in the installation portion of the lap anchor 9. In the occupant protection device configured to displace and move the shoulder portion inward in the vehicle width direction, first, provided at the retractor 8 at a time t3 when a predetermined time has elapsed after the operation of the drive mechanism. The locked state of the shoulder belt 5 by the locking mechanism 14 is released, and the restraint of the occupant by the shoulder belt 5 is gradually released, and at a predetermined time t4 thereafter. When configured to release the locked state of the lap belt 6 by the second locking mechanism comprising the driving means 25 provided in the installation portion of the lap anchor 9 and gradually release the restraint of the occupant by the lap belt 6, The advantage that after the driving mechanism and the side airbag device 3 are operated, the occupant can be prevented from receiving a strong sense of incongruity by moving the occupant outward in the vehicle width direction while maintaining a normal seating posture. There is.

  That is, after the operation of the drive mechanism, first, by releasing the restraint state of the shoulder belt 5 that holds the shoulder portion of the occupant, the upper body of the occupant in the inclined state as shown in FIG. As shown in d), since the waist is restrained by the lap belt 6 after shifting to a normal seating state that is substantially upright according to the inertial force J, the upper body of the occupant is tilted. The occupant's waist and head can be moved outwardly in the vehicle width direction substantially simultaneously while preventing a sense of discomfort by moving outward in the vehicle width direction in a natural state. Therefore, there is an advantage that the occupant can be effectively protected by dispersing the pressing force when the occupant abuts against the side airbag 34 to the shoulder and the trunk of the occupant.

  It should be noted that at the time of a frontal collision or a rearward collision of the vehicle, the first pretensioner mechanism 12 provided for restraining the occupant by pressing the webbing 7 against the occupant is used for a side collision or a rollover of the vehicle. Instead of the third embodiment in which tension is applied to the webbing 7 and the webbing 7 is crimped to the occupant, the crimping is performed by an air belt mechanism 42 having the same configuration as that of the second embodiment shown in FIG. A mechanism may be configured. According to the above configuration, when the vehicle side impact or rollover, the shoulder belt 5 and the bag portions 5a and 6a of the lap belt 6 are inflated, and these can be properly crimped to the occupant. Therefore, by operating the drive mechanism including the second pretensioner mechanism 45, the occupant seated on the vehicle seat 1 can be effectively moved inward in the vehicle width direction.

  Further, as shown in FIG. 14, the retractor 8 is replaced with the first embodiment in which the second locking mechanism is constituted by the driving means 25 having a worm gear driving mechanism for rotating the first holding cylinder 22. As in the case of the lock mechanism 14, the lap belt 6 is removably restrained by a pair of engaging members disposed with the lap belt 6 interposed therebetween, or the cylinder 30 of the second pretensioner mechanism 45 is held. In addition, a holding member configured to be able to adjust the holding force may be provided so that the restraining force by the lap belt 6 may be released as necessary.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat belt apparatus 3 Side airbag apparatus 5 Shoulder belt 6 Lap belt 7 Webbing 8 Retractor 9 Lap anchor 10 Tongue 11 Buckle 12 1st pretensioner mechanism (crimping mechanism)
13 Load detection means 14 First lock mechanism 25 Drive means (second lock mechanism)
28, 45 Second pretensioner mechanism (drive mechanism)
34 Side airbag 40 Seat belt control means 40a Lock release control means

Claims (7)

  A webbing having a shoulder belt that is slanted from the shoulder part of the occupant seated on the vehicle seat to the waist part and a lap belt that is installed to extend in the vehicle width direction across the occupant's waist part, and one end part of the webbing An occupant provided with a seat belt device having a retractor that can be wound up, a lap anchor that fixes the other end of the webbing to the vehicle body, and a buckle that removably supports a tongue provided on the webbing In the protective device, the webbing is driven so as to move at least the upper body of the occupant inward in the vehicle width direction by applying a tension to the webbing when the vehicle collides, and crimping the webbing to the occupant. When an impact load is input from the drive mechanism and the side of the vehicle, the crimping mechanism is activated to crimp the webbing to the occupant. Side belt for deploying a side airbag between the seat belt control means for controlling the drive mechanism to operate after the vehicle has been lifted, and the upper body of the occupant seated on the vehicle seat and the side wall of the passenger compartment at the time of a side collision of the vehicle A bag device, and when a predetermined time elapses after the drive mechanism and the side airbag device are operated, the webbing lock state by the lock mechanism provided in the retractor is released, and the occupant is moved out of the vehicle width direction. An occupant protection device configured to allow movement toward the passenger side.   The drive mechanism drives the shoulder belt and the lap belt to push the occupant inward in the vehicle width direction, and when the impact load is input from the side of the vehicle, the seat belt control means By operating the crimping mechanism to crimp the webbing to the occupant and then operating the driving mechanism, the occupant is moved inward in the vehicle width direction while maintaining the normal seating posture, and the driving is performed. After operation of the mechanism, first release the locked state of the lap belt by the lock mechanism provided in the installation part of the lap anchor and gradually feed out the lap belt, then install it on the retractor that supports the shoulder belt so that it can be wound up 2. The occupant protection device according to claim 1, wherein the occupant protection device is configured to release the locked state of the shoulder belt by the lock mechanism.   There is a lock release control means for controlling the timing of releasing the webbing lock state by the lock mechanism according to the load acting on the webbing at the time of a side collision of the vehicle, and when the load acting on the webbing is large, the tension The occupant protection device according to claim 1 or 2, wherein the unlocking timing is set earlier than when the vehicle is small.   The speed of releasing the locked state of the webbing by the lock mechanism is higher when the load acting on the webbing during a side collision of the vehicle is larger than when the load is small. The occupant protection device according to any one of 1 to 3.   The occupant protection device according to claim 3 or 4, further comprising load detection means for detecting a load acting on the webbing.   The occupant protection device according to any one of claims 1 to 5, wherein the side airbag is configured to cover from a shoulder part to a waist part of a seated occupant in the deployed state.   The drive mechanism drives the webbing so as to swing and displace the upper body of the occupant and move the shoulder part inward in the vehicle width direction. An impact load is input from the side part of the vehicle. The seat belt control means operates the crimping mechanism to crimp the webbing to the occupant, and then operates the drive mechanism to swing and displace the upper body of the occupant in the crimped state of the webbing. The webbing is driven so as to move the shoulder portion inward in the vehicle width direction, and after the operation of the drive mechanism, a shoulder by a lock mechanism provided on a retractor that supports the shoulder belt so as to be able to be wound is firstly provided. After releasing the belt lock state and gradually feeding out the shoulder belt, the lap bell by the lock mechanism provided in the installation part of the lap anchor Occupant protection device according to claim 1, characterized by being configured to release the locked state.

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