JP4259296B2 - Crew protection device - Google Patents

Description

  The present invention relates to an occupant protection device that restrains an occupant with a seat belt when the vehicle body is overturned.

In a conventional occupant restraint device, when a collision is detected by a signal from a collision detection means, a load is generated on the seat belt from the forward movement due to the inertia of the occupant at the initial stage of the collision, and then the seat belt is moved substantially backward in a predetermined pattern. In the middle stage of pulling and collision, the occupant is reduced by reducing the peak value of the deceleration applied to the occupant by suppressing the rearward movement of the seat belt so that the deceleration applied to the occupant substantially matches the deceleration of the vehicle body. There is known one that protects (see, for example, Patent Document 1).
JP 2000-264165 A (3rd page, FIG. 1)

  However, in such a conventional occupant protection device, the occupant is protected in response to a frontal collision, and when the collision is detected, a tension is generated on the seat belt to restrain the occupant from moving forward, Although it is possible to suppress occupants from interfering with interior parts at the front of the room, such as the front window glass and steering wheel, when the vehicle rolls over in the lateral or front-rear direction, The conventional occupant protection device is difficult to suppress effectively.

  Accordingly, the present invention provides an occupant protection device capable of effectively restraining the movement of an occupant in accordance with each case even when the vehicle body is overturned in the lateral direction or in the forward / backward direction.

The present invention comprises a shoulder belt for restraining the upper body of an occupant seated on a seat from one side of the waist to the other side of the shoulder, and a lower moving means for moving the upper support point of the shoulder belt downward of the vehicle body and the vehicle body Backward moving means for moving backwards;
Vehicle overturn detection means for detecting lateral rollover of the vehicle body, front / rear rollover,
A vehicle body rotation angle detecting means for detecting a rotation state at the time of lateral rollover of the vehicle body and front / rear rollover,
Seating position detection means for detecting the left and right seat positions where the occupant is seated, and
Based on the signals from the vehicle body rollover detection means and the vehicle body rotation angle detection means, the behavior of the occupant when the vehicle body is rotated by rollover is estimated, and the seating position is determined from the signal from the seating position detection means, The main feature is that the downward movement means and / or the backward movement means are operated and controlled to be restrained in the direction opposite to the centrifugal force acting on the occupant by the shoulder belt.

  According to the present invention, the behavior of the occupant can be estimated by detecting the rollover direction of the vehicle body and the rotation angle at the time of rollover by the vehicle rollover detection unit and the vehicle body rotation angle detection unit. By moving the upper support point of the shoulder belt downward and / or rearward by means, the occupant's restraint direction by the shoulder belt is set to be opposite to the centrifugal force acting on the occupant according to the rotational direction. It is possible to effectively restrain the occupant according to the seating position of the occupant by detecting the left and right seat positions where the occupant is seated by the seating position detecting means. .

  For this reason, when the vehicle body rolls over in the lateral direction or the front-rear direction, the occupant interferes with the vehicle interior components by reliably restraining the occupant's left-right direction, forward and upward movement regardless of the seating position of the occupant. Can be prevented or suppressed, and a passenger's protection function can be secured.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 to 17 show a first embodiment of an occupant protection device according to the present invention, FIG. 1 is a side view of a vehicle with a door removed for convenience, and FIG. 2 is a perspective view of a right seat constituting the occupant protection device, FIG. 3 is a perspective view showing the downward moving means by the upper part of (a) and the lower part of (b), FIG. 4 is a sectional view showing the downward moving means by the upper part of (a) and the lower part of (b), and FIG. FIG. 6 is a perspective view showing the function of the rearward movement means, FIG. 7 is a perspective view showing the function of the rearward movement means, and FIG. 8 shows the occupant behavior image at the time of lateral rollover. FIG. 9 is a perspective view showing the operation of the shoulder belt at the time of lateral rollover before and after the operation of (a), and FIG. 10 is an upper support of the shoulder belt at the time of horizontal rollover. The relationship between the downward movement amount of the point and the rotation angle of the vehicle body is shown in FIG. (B) is a graph showing the case where the occupant's seating position is opposite to the lateral rollover direction, FIG. 11 is an explanatory diagram showing the behavior image of the occupant at the time of forward rollover, and FIG. FIG. 13 is a perspective view showing the operation of the shoulder belt before the operation of (a), during the operation of (b), and after the completion of the operation of (c), and FIG. 13 shows the movement of the upper support point of the shoulder belt at the time of overturning forward FIG. 14 is a graph showing the relationship between the rearward movement amount and the vehicle body rotation angle in (a) and the relationship between the lower movement amount and the vehicle body rotation angle in (b), and FIG. FIG. 15 is an explanatory view, FIG. 15 is a perspective view showing the operation of the shoulder belt at the time of overturning before (a), during the operation of (b), and after the completion of the operation of (c), and FIG. The movement of the upper support point of the belt is expressed as follows: The graph indicated by the relationship between the rearward movement and the vehicle body rotational angle of engagement and (b), FIG. 17 is an explanatory view showing the algorithm of the control procedure of the occupant protection device.

  As shown in FIG. 1, the occupant protection device 1 according to the first embodiment includes a seat belt 3 including a shoulder belt 3S portion and a lap belt 3L portion, and the occupant seated on the seat 2 by the shoulder belt 3S. The upper body of M is restrained obliquely from one side of the waist Mw to the other side of the shoulder Ms, and the waist Mw of the occupant M is restrained by the lap belt 3L.

  The shoulder belt 3S supports its upper support point P on the vehicle body B via a downward movement means 10 that moves downward in the vehicle body and a backward movement means 20 that moves backward in the vehicle body.

  The occupant protection device 1 serves as a vehicle body rollover detection means for detecting a lateral rollover (hereinafter referred to as rollover) or a front / rear rollover (hereinafter referred to as forward roll or reverse roll) of the vehicle body B. The vehicle body inclination sensor 30, the vehicle body inclination sensor 30 and the inclination direction sensor 31 as the vehicle body rotation angle detecting means for detecting the rotation state of the vehicle body B at the time of rollover, forward rotation, and reverse rotation, and the left on which the occupant M is seated A weight sensor 32 as a seating position detecting means for detecting a right seat position, and the vehicle body inclination sensor 30 and the inclination direction sensor 31 are arranged in an engine room E in the front part of the vehicle body B; The weight sensor 32 is provided on the seat cushion 2A.

  The detection signals of the sensors 30, 31, and 32 are output to the controller 33 via the signal cable C, and the controller 33 obtains the movement amounts of the downward moving means 10 and the backward moving means 20 and drives them. A signal is output.

  In other words, the controller 33 estimates the behavior of the occupant M when the vehicle body B is rotating due to rollover based on the signals from the vehicle body tilt sensor 30 and the tilt direction sensor 31 and determines the seating position based on the signal from the weight sensor 32. Judgment is made to control the downward movement means 10 and / or the backward movement means 20 to tension the shoulder belt 3S, thereby restraining the occupant M in the direction opposite to the centrifugal force acting on it. .

  The downward moving means 10 and the backward moving means 20 include first and second rotary electric actuators 18 and 25, which will be described later, and are driven by their respective rotations.

  The vehicle body tilt sensor 30 as the vehicle body rollover detection means estimates the tilt angle of the vehicle body B, and the vehicle body B enters the rollover state when the tilt angle detected by the vehicle body tilt sensor 30 exceeds a preset threshold value. It comes to judge that there is.

  The vehicle body rotation angle detection means includes the vehicle body inclination sensor 30 and the inclination direction sensor 31, estimates the inclination angle of the vehicle body B by the vehicle body inclination sensor 30, estimates the rotation direction of the vehicle body B by the inclination direction sensor 31, and The vehicle body rotation angle is determined from the detection signals of the vehicle body tilt sensor 30 and the tilt direction sensor 31.

  A weight sensor 32 as a seating position detecting means is provided on the seat cushion and senses the weight of the occupant M to determine the presence or absence of seating.

  As shown in FIG. 2, the shoulder belt 3S has an upper end portion 3a inserted through an upper support point P provided outside the vehicle compartment, and then guides the front end portion 3a 'downward of the vehicle body to retract the seat belt retractor 4. On the other hand, the lower end 3b of the shoulder belt 3S is inserted into the tongue 5 that is engaged with the buckle 6 on the center side of the seat cushion 2A, and the front end 3b 'is seated on the seat cushion. A lap belt 3L is guided to the outside of the vehicle compartment 2A, and the tip 3b 'is fixed to the side sill Bs.

  The tongue 5 is detachably attached to the buckle 6 fixed to the frame on the center side of the passenger compartment of the seat cushion 2A.

  As shown in FIG. 2, the lower moving means 10 is inserted through the upper portion of the shoulder belt 3S and guides its tip portion downward, and the shoulder belt having the insertion guide portion of the shoulder belt 3S as an upper support point P. An anchor 11 is provided, and the shoulder belt anchor 11 is attached to an anchor rail 12 having a rectangular cross section disposed along the side of the vehicle interior of the center pillar Bp so as to be vertically movable.

  As shown in FIGS. 3 (a) and 4 (a), the anchor rail 12 has a rack shaft 14 inserted into a shaft hole 12a formed at the center of the upper end thereof so that the rack shaft 14 can be retracted and retracted. By being pressed and urged toward the shoulder belt anchor 11 by 13, the tip end portion thereof is fitted into a shaft hole 11 a formed in the shoulder belt anchor 11 to lock the movement of the shoulder belt anchor 11. .

  A main pinion 16 is disposed on the anchor rail 12 so as to face the upper side of the shaft hole 12a. The main pinion 16 is rotatably driven by the unlocking motor 15, and the shoulder belt anchor 11 is disposed on the upper side of the shaft hole 11a. A pinion 17 is rotatably coupled to a pin 17a.

  The main pinion 16 is always meshed with the rack shaft 14, and by driving the lock release motor 15, the rack shaft 14 fitted to the shoulder belt anchor 11 is pulled out from the shaft hole 11 a by the biasing force of the spring 13 to release the lock. It has become.

  Two guide grooves 12b are formed in the vertical direction on the inner wall of the anchor rail 12 where the shoulder belt anchor 11 is disposed. On the other hand, the shoulder belt anchor 11 is slidable in the guide grooves 12b. A pair of guide projections 11b that are engaged and prevented from coming off are formed, and the shoulder belt anchor 11 is movable in the vertical direction in a state where the guide grooves 12b and the guide projections 11b are fitted to each other. .

  As shown in FIGS. 3B and 4B, a storage recess 12c for storing the seat belt retractor 4 is formed at the lower end of the anchor rail 12, and the seat belt is accommodated in the storage recess 12c. A retractor 4 is attached.

  The seat belt retractor 4 is configured to drive the shoulder belt 3S at least in the direction of winding the shoulder belt 3S by the first rotary electric actuator 18, and the first rotary electric actuator 18 is unlocked with the shoulder belt anchor 11 unlocked. As shown in FIG. 5, the shoulder belt anchor 11 is moved downward as shown in FIG. 5 and the upper support point P of the shoulder belt 3S is moved downward.

  As shown in FIG. 2, the rearward movement means 20 includes a rotation mechanism 21 that rotates the anchor rail 12 toward the rear of the vehicle body with the upper end portion of the anchor rail 12 as a rotation center.

  As shown in FIG. 6, the rotating mechanism 21 has a casing 21a fixed to the roof side rail Br (see FIG. 2), and a worm shaft 22 in which a helical gear is formed inside the casing 21a. It arrange | positions in the front-back direction, and this worm shaft 22 is rotationally driven by the 2nd rotary electric actuator 25 via the gears 23 and 24 which mutually mesh | engage.

  Further, a worm wheel 26 is provided in the casing 21a so as to be located at an upper portion of the anchor rail 12 and meshes with the worm shaft 22, and a rotating shaft 26a that rotates integrally with the worm wheel 26 is arranged in the vehicle width direction. Arranged and supported rotatably on the casing 21a.

  Then, a pair of connecting shafts 27 project from the upper end of the anchor rail 12 on both sides of the worm wheel 26, and these connecting shafts 27 are inserted from openings 21b formed in the bottom of the casing 21a, The rotating shaft 26a of the worm wheel 26 is coupled.

  Therefore, by driving the second rotary electric actuator 25, the worm shaft 22 is rotated, and the rotation of the worm shaft 22 is taken out by the worm wheel 26 and the rotating shaft 26a is rotated, as shown in FIG. The anchor rail 12 is rotated to the rear of the vehicle body around the rotation shaft 26a, and the upper support point P of the shoulder belt 3S is moved to the rear of the vehicle body.

  And when the vehicle body B rolls over, the passenger | crew protection apparatus 1 comprised in this way also rotates the passenger | crew M with the vehicle body B laterally as shown to Fig.8 (a)-(i). When the seating position of M is a seat on the same side as the rollover direction of the vehicle body B, as shown in FIG. 9B, the downward movement means 10 is operated to move the upper support point P downward of the vehicle body. When the lateral rotation angle of B reaches 90 degrees (see FIG. 8C), the downward movement amount h of the upper support point P is set to a preset maximum downward movement position (see FIG. 10A). ). In FIG. 8, Cf represents the centrifugal force acting on the occupant M, and so on.

  On the other hand, when the seating position of the occupant M is a seat on the side opposite to the rollover direction of the vehicle body B, the lower moving means 10 is operated in the same manner as described above to move the upper support point P downward. When it is determined that the lateral rotation angle of B has reached 180 degrees (see FIG. 8E), the downward movement amount h of the upper support point P is set to a preset maximum downward movement position (FIG. 10 ( b)).

  Next, when the vehicle body B rotates forward, the occupant M also rotates forward together with the vehicle body B as shown in FIGS. 11 (a) to 11 (i), and as shown in FIG. Is operated to move the upper support point P rearward, and when the forward rotation angle of the vehicle body B reaches 90 degrees (see FIG. 11C), the rearward movement amount l of the upper support point P is set in advance. The maximum rearward movement position is set (see FIG. 13 (a)), and at this time, the downward movement means 10 is operated to move the upper support point P downward as shown in FIG. 12 (c). When the forward rotation angle of the vehicle body B reaches 180 degrees (see FIG. 11E), the downward movement amount of the upper support point P is set to a preset maximum downward movement position (see FIG. 13B). ). In FIG. 11, G indicates the center of gravity acting on the occupant M, and so on.

  Further, when the vehicle body B rotates backward, as shown in FIGS. 14A to 14I, the occupant M also rotates rearward together with the vehicle body B, and the rearward rotation angle of the vehicle body B reaches 90 degrees (FIG. 14). 14 (c)), as shown in FIG. 15 (b), the downward movement means 10 is operated to move the upper support point P downward in the vehicle body, and the rearward rotation angle of the vehicle body B reaches 180 degrees. When (see FIG. 14 (e)), the downward movement amount of the upper support point P is set to a preset maximum downward movement position (see FIG. 16 (a)), and as shown in FIG. 15 (c). When the rearward moving means 20 is operated to move the upper support point P rearward of the vehicle body and the rearward rotation angle of the vehicle body B reaches 270 degrees (see FIG. 14G), the upper support point P is moved rearwardly. The amount is set to a preset maximum rearward movement position (see FIG. 16B).

  The occupant protection device 1 according to the first embodiment having the above-described configuration is configured to control the movement of the upper support point P of the shoulder belt 3S with the algorithm shown in FIG. In step S1, the overturning state of the vehicle body B is determined based on the signal from the vehicle rollover detection means (the vehicle body tilt sensor 30). If it is determined that the vehicle has not overturned (NO), the system is terminated, but it is determined that the vehicle has overturned. In the case (YES), the rotation direction of the vehicle body B is determined based on the signals of the vehicle body rotation angle detection means (the vehicle body inclination sensor 30 and the inclination direction sensor 31) in step S2. In step S2, it is determined that the vehicle body B rolls over from the left side (Rsl), and in step S3, the seating position of the occupant M is determined from the left seat (Sl) by a signal from the seating position detection means (weight sensor 32). If it is determined that the vehicle body B is rolling over from the right side (Rsr) in step S2, and the signal from the seating position detecting means (weight sensor 32) is determined in step S4, the seating of the occupant M is performed. When it is determined that the position is the right seat (Sr), a drive voltage to the unlocking motor 15 is generated in step S5 and the first moving electric actuator 18 of the downward moving means 10 (seat belt retractor 4) is applied. By generating a driving voltage and winding the shoulder belt 3S, the shoulder belt anchor 11 (upper support point P) is moved downward in the vehicle body. (Refer to Figure 5).

  Next, in step S6, the side rotation angle of the vehicle body B is determined from the signals of the vehicle body rotation angle detection means (the vehicle body inclination sensor 30, the inclination direction sensor 31), and it is determined that the side rotation angle has reached 90 degrees. In this case, in step S7, the first rotary electric actuator 18 of the downward movement means 10 is continuously driven to move the shoulder belt anchor 11 (upper support point P) to a preset lower limit position (see FIG. 9B). .

  At this time, if it is determined in step S6 that the side rotation angle has not reached 90 degrees (rotation angle <90 degrees), the process returns to the determination of the body rollover in step S1.

  On the other hand, if it is determined in step S2 that the vehicle body B is a rollover from the right side (Rsr) and it is determined in step S4 that the seating position of the occupant M is the left seat (Sl), or the vehicle body is determined in step S2. If it is determined that B is a rollover from the left side (Rsl) and the seating position of the occupant M is the right seat (Sr) in step S3, the drive voltage to the unlocking motor 15 is determined in step S8. And the shoulder belt anchor 11 (upper support point P) moves downward in the vehicle body by generating a driving voltage for the first rotary electric actuator 18 of the downward movement means 10 and winding the shoulder belt 3S (see FIG. (See FIG. 5).

  Next, when it is determined in step S9 that the lateral rotation angle of the vehicle body B has reached 180 degrees from the signal of the vehicle body rotation angle detection means (vehicle body inclination sensor 30, inclination direction sensor 31), the downward movement means in step S10. The ten first rotary electric actuators 18 are continuously driven to move the shoulder belt anchor 11 (upper support point P) to a preset lower limit position (see FIG. 9B).

  At this time, if it is determined in step S9 that the side rotation angle has not reached 180 degrees (rotation angle <180 degrees), the process returns to the determination of the body rollover in step S1.

  If it is determined in step S2 that the vehicle body B is forward rotation (Rf), a drive voltage to the second rotary electric actuator 25 of the backward movement means 20 is generated in step S11, and the anchor rail 12 is rotated backward. As a result, the shoulder belt anchor 11 (upper support point P) is moved rearward of the vehicle body (see FIG. 7).

  Next, when it is determined in step S12 that the forward rotation angle of the vehicle body B has reached 90 degrees based on signals from the vehicle body rotation angle detection means (the vehicle body inclination sensor 30 and the inclination direction sensor 31), the backward movement means 20 in step S13. The second rotary electric actuator 25 is continuously driven to move the shoulder belt anchor 11 (upper support point P) to a preset rear limit position (see FIG. 12B).

  When the shoulder belt anchor 11 moves to the rear limit position in this way, a drive voltage to the unlocking motor 15 is generated and a drive voltage to the first rotary electric actuator 18 of the seat belt retractor 4 is generated in step S14. Then, the shoulder belt anchor 11 (upper support point P) is moved downward in the vehicle body.

  At this time, if it is determined in step S12 that the forward rotation angle has not reached 90 degrees (rotation angle <90 degrees), the process returns to the determination of the body rollover in step S1.

  Next, when it is determined in step S15 that the forward rotation angle of the vehicle body B has reached 180 degrees based on the signals of the vehicle body rotation angle detection means (the vehicle body inclination sensor 30 and the inclination direction sensor 31), the downward movement means 20 in step S16. The first rotary electric actuator 18 is continuously driven to move the shoulder belt anchor 11 (upper support point P) to a preset lower limit position (see FIG. 12C).

  At this time, if it is determined in step S15 that the forward rotation angle has not reached 180 degrees (rotation angle <180 degrees), the process returns to the determination of the body rollover in step S1.

  If it is determined in step S2 that the vehicle body B is reverse (Rr), in step S17, the rear rotation angle of the vehicle body B is determined by signals from the vehicle body rotation angle detection means (the vehicle body inclination sensor 30 and the inclination direction sensor 31). If it is determined that the angle has reached 90 degrees, a drive voltage to the unlocking motor 15 is generated in step S18, and a drive voltage to the first rotary electric actuator 18 of the seat belt retractor 4 is generated to generate the shoulder belt anchor 11. (Upper support point P) is moved downward in the vehicle body.

  At this time, if it is determined in step S17 that the rearward rotation angle has not reached 90 degrees (rotation angle <90 degrees), the process returns to the determination of vehicle body rollover in step S1.

  Next, when it is determined in step S19 that the rearward rotation angle of the vehicle body B has reached 180 degrees based on signals from the vehicle body rotation angle detection means (the vehicle body inclination sensor 30 and the inclination direction sensor 31), the downward movement means 10 in step S20. The first rotating electric actuator 18 is continuously driven to move the shoulder belt anchor 11 (upper support point P) to a preset lower limit position (see FIG. 15B).

  When the shoulder belt anchor 11 moves to the lower limit position in this way, a drive voltage to the second rotary electric actuator 25 of the rearward movement means 20 is generated in step S21, and the shoulder rail 12 is rotated rearward. The belt anchor 11 (upper support point P) is moved rearward of the vehicle body.

  Next, when it is determined in step S22 that the rear rotation angle of the vehicle body B has reached 270 degrees based on signals from the vehicle body rotation angle detection means (the vehicle body inclination sensor 30 and the inclination direction sensor 31), the rearward movement means 20 is determined in step S23. The second rotary electric actuator 25 is continuously driven, and the shoulder belt anchor 11 (upper support point P) is moved to a preset rear limit position (see FIG. 15C).

  At this time, if it is determined in step S22 that the rearward rotation angle has not reached 270 degrees (rotation angle <270 degrees), the process returns to the determination of overturning of the vehicle body in step S1.

  According to the occupant protection device 1 of the first embodiment having the above configuration, the vehicle body tilt sensor 30 and the tilt direction sensor 31 can detect the rollover direction of the vehicle body B and the rotation angle at the time of rollover. Can be estimated.

  Therefore, the shoulder belt anchor 11, that is, the upper support point P of the shoulder belt 3 </ b> S is controlled to move downward or rearward by at least one of the downward moving means 10 and the backward moving means 20 according to the behavior of the occupant M. The movement direction of the occupant M can be effectively restrained by setting the restraint direction of the occupant M by 3S to be opposite to the centrifugal force acting on the occupant M according to the rotation direction.

  Further, by detecting the positions of the left and right seats 2 on which the occupant is seated by the weight sensor 32 provided on the seat cushion 2A, the occupant can be restrained appropriately according to the seating position of the occupant M.

  Therefore, when the vehicle body B rolls over in the lateral direction or the front-rear direction, the occupant M interferes with the vehicle interior components by reliably restraining the occupant M from moving in the left-right direction, forward and upward, regardless of the seating position of the occupant M. It is possible to prevent or suppress this, and ensure the passenger's protection function. The rearward and downward movement of the occupant M is restrained by the seat 2.

  Further, in the first embodiment, in addition to the above-described effects, when the vehicle body B rolls over, if the seating position of the occupant M is a seat on the same side as the vehicle rollover direction, the downward moving means 10 is operated. When the upper support point P is moved downward and the lateral rotation angle of the vehicle body B reaches 90 degrees, the downward movement amount h of the upper support point P is set to a preset maximum downward movement position, When the seating position of the occupant M is a seat on the side opposite to the rollover direction of the vehicle body B, the downward movement means 10 is operated to move the upper support point P downward and the lateral rotation angle of the vehicle body is 180 degrees. When the vehicle body B rolls over, the restraining effect of the occupant M can be further enhanced because the downward movement amount h of the upper support point P is set to the preset maximum downward movement position. .

  Further, when the vehicle body B rotates forward, the rearward movement means 20 is operated to move the upper support point P to the rear of the vehicle body, and when the front rotation angle of the vehicle body B reaches 90 degrees, the rear of the upper support point P When the movement amount l is set to a preset maximum backward movement position, the downward movement means 10 is operated at this point to move the upper support point P downward in the vehicle body, and when the forward rotation angle of the vehicle body reaches 180 degrees Since the downward movement amount h of the upper support point P is set to the preset maximum downward movement position, the restraining effect of the occupant M by the shoulder belt 3S can be further enhanced during the forward rotation of the vehicle body B.

  Furthermore, when the vehicle body B rotates backward, when the rearward rotation angle of the vehicle body B reaches 90 degrees, the lower moving means 10 is operated to move the upper support point P downward, and further to the rear of the vehicle body. When the rotation angle reaches 180 degrees, the downward movement amount h of the upper support point P is set to the preset maximum downward movement position, and the rearward movement means 20 is operated to move the upper support point P rearward of the vehicle body. When the rearward rotation angle of the vehicle body B reaches 270 degrees, the rearward movement amount l of the upper support point P is set at the preset maximum rearward movement position. The restraining effect can be further enhanced.

  Further, since the downward moving means 10 and the backward moving means 20 are provided with the first and second rotary electric actuators 18 and 25 and are driven by their respective rotations, the amount of pull-in and pull-in force of the shoulder belt 3S can be arbitrarily set. And the movement of the occupant can be arbitrarily restrained for each seating position of the occupant M according to the rotation angle and the rotation direction of the vehicle body B.

  Furthermore, when the vehicle body inclination sensor 30 is used as the vehicle body rollover detection means, the vehicle body inclination sensor 30 estimates the inclination angle of the vehicle body B, and the inclination angle detected by the vehicle body inclination sensor 30 exceeds a preset threshold value. Since the vehicle body B is determined to be in an overturned state, it is possible to reliably determine the overturned state of the vehicle body B, thereby reliably restraining the occupant M during the overturning and further enhancing the occupant protection function. Can do. Further, the vehicle body rotation angle detecting means is constituted by the vehicle body inclination sensor 30 and the inclination direction sensor 31, the inclination angle of the vehicle body B is estimated by the vehicle body inclination sensor 30, and the rotation direction of the vehicle body B is estimated by the inclination direction sensor 31. Since the vehicle body rotation angle is determined from the respective detection signals of the vehicle body inclination sensor 30 and the inclination direction sensor 31, even if the vehicle body B is rotated in the lateral direction, the front direction, or the rear direction (overturning), The state during rotation of the vehicle body B can be accurately grasped, and as a result, the occupant M can be reliably restrained during overturning.

  Further, since the weight sensor 32 is used as a seating position detection means and is provided in the seat cushion 2A, the weight of the occupant M seated on the seat cushion 2A is sensed to determine whether or not the seat is seated. 2 can be reliably detected, and when there is an existing vehicle equipped with the weight sensor 32, the occupant position can be detected easily and inexpensively using the occupant detection device.

  18 to 36 show a second embodiment of the present invention, in which the same components as those in the first embodiment are denoted by the same reference numerals and redundant description is omitted, and FIG. FIG. 19 is a perspective view of the right side seat constituting the occupant protection device, FIG. 20 is a perspective view showing the downward moving means with the upper part of (a) and the lower part of (b), and FIG. The perspective view of the operation state which shows the upper part of a movement means, FIG. 22 is sectional drawing which shows a downward movement means by the upper part of (a), and the lower part of (b), FIG. 23 is sectional drawing which shows the locked state of a downward movement means, 24 is a perspective view of the main part showing the locked state of the downward moving means, FIG. 25 is a front view of the main part showing the unlocked state of the downward moving means, FIG. 26 is a perspective view showing the function of the downward moving means, and FIG. Explanatory diagram showing the occupant's behavior image at the time of direction rollover in order, FIG. FIG. 29 is a perspective view showing the operation of the shoulder belt at the time of turning over before the operation of (a) and after the completion of the operation of (b). FIG. FIG. 30 is a graph showing a case where the occupant seating position coincides with the lateral rollover direction and (b) a case where the occupant seating position is opposite to the lateral rollover direction. FIG. 31 shows the operation of the shoulder belt at the time of forward rollover before (a) during operation and after (c) completion of operation. FIG. 32 is a perspective view, and FIG. 32 shows the movement of the upper support point of the shoulder belt at the time of forward rollover in the relationship between the rearward movement amount and the vehicle body rotation angle in (a) and the relationship between the lower movement amount and the vehicle body rotation angle in (b). The graph shown in Fig. 33 shows the behavior image of the occupant during rollover FIG. 34 is a perspective view showing the operation of the shoulder belt at the time of overturning before and after the operation of (a), after the operation of (b) and after the completion of the operation of (c), and FIG. FIG. 36 is a graph showing the movement of the upper support point of the shoulder belt by the relationship between the downward movement amount and the vehicle body rotation angle in (a) and the relationship between the backward movement amount and the vehicle body rotation angle in (b). It is explanatory drawing which shows a control procedure with an algorithm.

  The function of the passenger protection device 1a of the second embodiment is substantially the same as that of the first embodiment, but the specific structure of the downward movement means 10a is different.

  That is, as shown in FIG. 18, the vehicle B to which the occupant protection device 1a of the second embodiment is applied is a shoulder that obliquely restrains the upper body of the occupant M seated on the seat 2 as in the first embodiment. A belt 3S is provided, and an upper support point P of the shoulder belt 3S is provided with a downward moving means 10a that moves downward in the vehicle body and a backward movement means 20 that moves backward in the vehicle body.

  The occupant protection device 1a detects the rollover, forward rotation, and reverse rotation of the vehicle body B with the vehicle body tilt sensor 30 as the vehicle rollover detection means, and the vehicle body B rolls over, forwards, and backwards as in the first embodiment. The rotation state at the time of rolling is detected by the vehicle body inclination sensor 30 and the inclination direction sensor 31 as the vehicle body rotation angle detection means, and the left and right seat positions where the occupant M is seated are detected by the weight sensor 32 as the seating position detection means. The signals of these sensors 30, 31 and 32 are processed by the controller 33 and drive signals are output to the downward moving means 10 a and the backward moving means 20.

  Here, the downward moving means 10a of the second embodiment is provided with an anchor cover 40 covering the shoulder belt anchor 11 and moving the anchor cover 40 downward along the anchor rail 12 as shown in FIG. Thus, the upper support point P of the shoulder belt 3S is moved downward.

  That is, the anchor cover 40 is formed in a rectangular cross section as shown in FIGS. 20 (a) and 22 (a), and the shoulder belt anchor 11 is accommodated in the closed cross section, so that the vehicle width direction The outer side surface 40a is inserted into guide grooves 12d formed on the front and rear side surfaces of the anchor rail 12 so as to be relatively movable. For this reason, the guide rail 12b (refer FIG. 3) of the inner wall shown in 1st Embodiment is abolished in the anchor rail 12 of this embodiment.

  As shown in FIGS. 20 (b), 22 (b), and 23 (b), a shelf 12e is formed on the lower inner side of the anchor rail 12 above the storage recess 12c for storing the seat belt retractor 4. A third rotary electric actuator 41 serving as a drive source for the downward moving means 10a is fixed to the upper surface of the shelf 12e.

  A pulley 42 that rotates integrally with the output shaft of the third rotary electric actuator 41 is attached, and a wire 43 wound around the pulley 42 is routed upward to the opening / closing hook 44 shown in FIG. It is connected.

  As shown in FIGS. 22 (a) and 23 (a), the opening / closing hook 44 has an opening / closing fulcrum 44 c of a pair of hook pieces 44 a, 44 b that opens and closes on the outer surface 40 a of the anchor cover 40. In addition to pivoting, the upper end of the wire 43 is bifurcated from the branch point 43a, and the branch tip portions 43b and 43c are connected to the intermediate portions of the hook pieces 44a and 44b that are most separated from each other.

  Further, a tension spring 45 is attached between the hook pieces 44a and 44b, and a biasing force in the normally closing direction is applied to the hook pieces 44a and 44b.

  At this time, as shown in FIGS. 22 (a) and 23 (a), the anchor cover 40 is located at the initial position, that is, the uppermost position of the opening / closing hook 44, on the inner surface of the outer wall of the anchor rail 12. A fixed shelf 46 is integrally projected at a position corresponding to the pair of hook pieces 44a and 44b.

  Therefore, when the anchor cover 40 is in the initial position and the open / close hook 44 is in a natural state, the hook pieces 44a and 44b are closed by the urging force of the tension spring 45 and the fixed shelf 46 is gripped as shown in FIG. In the gripping state, the hook pieces 44a, 44b engage with the fixed shelf 46 to be locked.

  When the third rotary electric actuator 41 is driven in a state where the anchor cover 40 is locked at the initial position (uppermost position), the wire 43 is wound around the pulley 42 and pulled downward. As shown in FIG. 25, the hook pieces 44a and 44b open around the opening / closing fulcrum 44c against the urging force of the tension spring 45.

  Then, the engagement between the opening / closing hook 44 and the fixed shelf 46 is released and unlocked, and then the third rotary electric actuator 41 is continuously driven to wind the wire 43 around the pulley 42, thereby The anchor cover 40 moves downward along the anchor rail 12.

  Then, as shown in FIG. 21, since the anchor cover 40 takes in the upper portion of the shoulder belt 3S from the lower edge portion thereof, the upper support point P of the shoulder belt 3S becomes the lower edge portion of the anchor cover 40. Since the lower edge portion is lowered by driving the third rotary electric actuator 41, the upper support point P can be moved downward in the vehicle body.

  Accordingly, in the second embodiment, the upper support point P of the shoulder belt 3S is moved downward by the lowering of the anchor cover 40, and the upper support point P is locked by the opening / closing hook 44. It is not necessary to move the illustrated shoulder belt anchor 11 with respect to the anchor rail 12, and the rack shaft 14 and the lock release motor 15 (see FIG. 3) can be eliminated.

  Further, the seat belt retractor 4 of the second embodiment only needs to have a conventional function of winding and unwinding the belt, and the first rotary electric actuator for winding the belt shown in the first embodiment. 18 has been abolished.

  As in the first embodiment, the rearward movement means 20 rotates the anchor rail 12 toward the rear of the vehicle body with the upper end of the anchor rail 12 as the rotation center. In the second embodiment, the first embodiment is the first embodiment. The description will be omitted by attaching the same reference numerals.

  And when the vehicle body B rolls over similarly to 1st Embodiment, as shown to FIG. 27 (a)-(i), the passenger | crew M of this passenger | crew protection apparatus 1a of this 2nd structure comprised in this way also becomes. When the vehicle seat B rotates laterally together with the vehicle body B and the seating position of the occupant M is a seat on the same side as the rollover direction of the vehicle body B, the anchor cover 40 is lowered as shown in FIG. When the upper support point P is moved downward and the lateral rotation angle of the vehicle body B reaches 90 degrees (see FIG. 27C), the downward movement amount h of the upper support point P is set to the maximum downward The moving position is set (see FIG. 29A).

  Further, when the seating position of the occupant M is a seat on the side opposite to the rollover direction of the vehicle body B, the anchor cover 40 is lowered and the upper support point P is moved downward in the same manner as described above. When it is determined that the side rotation angle has reached 180 degrees (see FIG. 27E), the downward movement amount h of the upper support point P is set to a preset maximum downward movement position (FIG. 29B). )reference).

  Next, when the vehicle body B rotates forward, the occupant M also rotates forward together with the vehicle body B as shown in FIGS. 30 (a) to 30 (i), and the anchor rail 12 is moved as shown in FIG. 31 (b). When the vehicle is rotated backward to move the upper support point P to the rear of the vehicle body and the front rotation angle of the vehicle body B reaches 90 degrees (see FIG. 30C), the rearward movement amount l of the upper support point P is set to A preset maximum rearward movement position is set (see FIG. 32 (a)), and at this time, the anchor cover 40 is lowered and the upper support point P is moved downward as shown in FIG. 31 (c). When the forward rotation angle of the vehicle body B reaches 180 degrees (see FIG. 30E), the downward movement amount of the upper support point P is set to a preset maximum downward movement position (FIG. 32B). reference).

  Further, when the vehicle body B rotates backward, as shown in FIGS. 33A to 33I, the occupant M also rotates rearward together with the vehicle body B, and the rearward rotation angle of the vehicle body B reaches 90 degrees (FIG. 33 (c)), as shown in FIG. 34 (b), the anchor cover 40 is lowered and the upper support point P is moved downward, and the rearward rotation angle of the vehicle body B reaches 180 degrees. At the time (see FIG. 33 (e)), the downward movement amount of the upper support point P is set to a preset maximum downward movement position (see FIG. 35 (a)), and as shown in FIG. 34 (c), When the anchor rail 12 is rotated rearward to move the upper support point P to the rear of the vehicle body and the rearward rotation angle of the vehicle body B reaches 270 degrees (see FIG. 33G), the rear of the upper support point P The movement amount is set to a preset maximum rearward movement position (see FIG. 35B).

  The occupant protection device 1 of the second embodiment having the above-described configuration is configured to control the movement of the upper support point P of the shoulder belt 3S with the algorithm shown in FIG. 36. This algorithm is the first algorithm shown in FIG. The control is substantially the same as the algorithm of the embodiment, and the same processing parts as those of the first embodiment are denoted by the same step numbers and redundant description thereof is omitted, and the similar processing parts are denoted by the step numbers of the first embodiment. It shall be explained with a dash (').

  That is, in the processing of the algorithm of the second embodiment, the parts that are similar to the first embodiment but differ in specific processing contents are step S5 ', step S7', step S8 ', step S10', step S14 '. Step S16 ′, Step S18 ′ and Step S20 ′. In Step S5 ′, Step S8 ′ and Step S14 ′, a drive voltage is generated in the third rotary electric actuator 41 to operate the downward moving means 10a. Then, the process of moving the anchor cover 40 downward is executed.

  In step S7 ', step S10', step S16 ', and step S20', the third rotary electric actuator 41 of the downward moving means 10 is continuously driven to set the anchor cover 40 (upper support point P) to a preset lower limit. A process of moving to a position is executed.

  With the above configuration, according to the passenger protection device 1a of the second embodiment, the overturning direction of the vehicle body B and the rotation angle at the time of overturning are detected by the vehicle body inclination sensor 30 and the inclination direction sensor 31 as in the first embodiment. Thus, the behavior of the occupant M can be estimated.

  Then, according to the behavior of the occupant M, the anchor cover 40 is lowered by at least one of the downward movement means 10a and the backward movement means 20, and the upper support point P of the shoulder belt 3S is controlled to move downward. , And the upper support point P is controlled to move rearward of the vehicle body so that the restraining direction of the occupant M by the shoulder belt 3S is opposite to the centrifugal force acting on the occupant M according to the rotational direction. The movement of the occupant M can be effectively restrained.

  Further, by detecting the positions of the left and right seats 2 on which the occupant is seated by the weight sensor 32 provided on the seat cushion 2A, the occupant can be restrained appropriately according to the seating position of the occupant M. When B rolls over in the lateral direction or the front-rear direction, regardless of the seating position of the occupant M, the occupant M is reliably restrained from moving in the left-right direction, forward and upward, and the occupant M interferes with the vehicle interior components. It is possible to prevent or suppress the occupant protection function.

  37 to 53 show a third embodiment of the present invention, in which the same components as those in the first embodiment are denoted by the same reference numerals and redundant description is omitted, and FIG. FIG. 38 is a perspective view of the right side seat constituting the occupant protection device, FIG. 39 is a perspective view showing the rearward movement means with the upper part of (a) and the lower part of (b), and FIG. The perspective view which looked at the lower part of the moving means from the lower part, FIG. 41 is the perspective view which shows the operating state of the backward moving means, FIG. 42 is the perspective view which shows the downward moving means by the upper part of (a) and the lower part of (b) 43 is a cross-sectional view showing the downward movement means in the upper part of (a) and the lower part of (b), FIG. 44 is a perspective view showing the operating state of the downward movement means, and FIG. 45 is an image of the behavior of the occupant during lateral rollover FIG. 46 shows the operation of the shoulder belt during lateral rollover (a FIG. 47 is a perspective view showing the position of the occupant seating position before the operation of (b) and after the completion of the operation of (b). FIG. FIG. 48 is a graph showing the case where the occupant seating position is on the side opposite to the lateral rollover direction in FIG. 49 is a perspective view showing the operation of the shoulder belt at the time of forward rollover before (a), during the operation of (b) and after the completion of the operation of (c), and FIG. 50 is a shoulder belt at the time of forward rollover. FIG. 51 is a graph showing the movement of the upper support point of the vehicle in terms of the relationship between the rearward movement amount and the vehicle body rotation angle in (a) and the relationship between the lower movement amount and the vehicle body rotation angle in (b). FIG. 52 is an explanatory view showing the behavior image in order, FIG. FIG. 53 is a perspective view showing the belt operation before the operation of (a), during the operation of (b) and after the completion of the operation of (c), and FIG. 53 shows the movement of the upper support point of the shoulder belt at the time of reverse rollover. 4 is a graph showing the relationship between the downward movement amount of the vehicle and the vehicle body rotation angle, and the relationship between the backward movement amount and the vehicle body rotation angle of FIG.

  The function of the passenger protection device 1b of the third embodiment is substantially the same as that of the first embodiment, but the specific structure of the rearward moving means 20a is different.

  That is, as shown in FIG. 37, a vehicle B to which the occupant protection device 1b according to the third embodiment is applied is a shoulder that obliquely restrains the upper body of the occupant M seated on the seat 2 as in the first embodiment. A belt 3S is provided, and an upper support point P of the shoulder belt 3S is provided with a downward moving means 10 that moves downward in the vehicle body and a backward movement means 20a that moves backward in the vehicle body.

  The occupant protection device 1b detects the rollover, forward rotation, and reverse rotation of the vehicle body B with the vehicle body inclination sensor 30 as the vehicle rollover detection means, as in the first embodiment. The rotation state at the time of rolling is detected by the vehicle body inclination sensor 30 and the inclination direction sensor 31 as the vehicle body rotation angle detection means, and the left and right seat positions where the occupant M is seated are detected by the weight sensor 32 as the seating position detection means. The signals of these sensors 30, 31, 32 are processed by the controller 33, and drive signals are output to the downward moving means 10 and the backward moving means 20a.

  Here, as shown in FIGS. 37 and 38, the rearward moving means 20a of the third embodiment includes an upper rail 50 attached in the longitudinal direction of the vehicle body along the roof side rail Br and a longitudinal direction of the vehicle body along the side sill Bs. And a lower rail 51 attached in the longitudinal direction of the vehicle body along the direction, and an anchor rail 52 having a rectangular cross section is attached between the upper rail 50 and the lower rail 51 so as to be movable in the longitudinal direction of the vehicle body. The upper support point P of the belt 3S can be moved rearward of the vehicle body.

  The anchor rail 52 is moved rearward of the vehicle body by a drive mechanism 53 provided in the upper rail 50. The drive mechanism 53 is substantially the same as the turning mechanism 21 shown in the first embodiment. In the first embodiment, the anchor rail 12 is rotated backward, whereas in the third embodiment, as shown in FIG. 41, the anchor rail 52 is translated backward. In this embodiment, the same components as those of the rotation mechanism 21 of the first embodiment are denoted by the same reference numerals and described.

  That is, in the drive mechanism 53 of the third embodiment, as shown in FIG. 39A, a worm shaft 22 in which a helical gear is formed in the upper rail 50 is disposed in the longitudinal direction of the vehicle body. Are driven to rotate by a second rotary electric actuator 25 through gears 23 and 24 meshing with each other.

  Then, two inverted U-shaped shafts 54, 54 a protruding from the upper end of the anchor rail 52 are arranged in the upper rail 50 from the two parallel grooves 50 a formed on the lower surface of the upper rail 50, and these shafts 54, The worm wheels 55 and 55a are rotatably provided in the horizontal part of the center part of 54a, and these worm wheels 55 and 55a are meshed with the upper side of the worm shaft 22 in a suspended state.

  On the other hand, the lower end portion of the anchor rail 52 is provided with four rollers 56 that roll on the upper surface of the lower rail 51 as shown in FIGS. A guide shaft 57 is protruded, and this guide shaft 57 is fitted in a guide groove 51 a formed in the center of the upper surface of the lower rail 51 in the longitudinal direction of the vehicle body so as to be relatively movable.

  The backward movement means 20a of the third embodiment drives the second rotary electric actuator 25, so that the rotation of the second rotary electric actuator 25 is transmitted to the worm shaft 22 via the gears 23, 24. As the shaft 22 rotates, the two worm wheels 55, 55a rotate, and these worm wheels 55, 55a roll to the rear of the vehicle body.

  Therefore, the anchor rail 52 moves to the rear of the vehicle body due to the rolling of the worm wheels 55, 55a, and as a result, as shown in FIG. 41, the upper support point P (in FIG. 41, provided on the anchor rail 52). The shoulder belt anchor 11) can be moved backward.

  At this time, the anchor rail 52 smoothly moves on the lower rail 51 by the roller 56 provided at the lower end portion, and can move backward while maintaining the verticality of the anchor rail 52, and the guide shaft 57 is guided by the guide groove 51a. The anchor rail 52 can be prevented from swinging in the vehicle width direction.

  On the other hand, the downward moving means 10 is shown in FIGS. 42 and 43. The downward moving means 10 has the same configuration as that shown in the first embodiment. In the third embodiment, the same components as those in the first embodiment are used. The same reference numerals will be given and overlapping descriptions will be omitted.

  As shown in FIGS. 42A and 43A, the downward moving means 10 forms a shaft hole 52a into which the rack shaft 14 can be inserted and retracted at the center of the upper end portion of the anchor rail 52. The movement of the shoulder belt anchor 11 is locked by fitting the front end portion thereof into the shaft hole 11 a of the shoulder belt anchor 11.

  Similarly to the first embodiment, the rack shaft 14 is pulled out of the shaft hole 11a of the shoulder belt anchor 11 by the drive of the unlocking motor 15, and unlocked. The shoulder belt anchor 11 has the guide projection 11b thereof. It is possible to move downward while being guided by the guide groove 52 b of the anchor rail 52.

  Further, the seat belt retractor 4 housed in the housing recess 52c formed at the lower end of the anchor rail 52 is driven in the direction in which at least the shoulder belt 3S is wound by the first rotary electric actuator 18 as in the first embodiment. 44, when the first rotary electric actuator 18 winds up the shoulder belt 3S with the shoulder belt anchor 11 unlocked, the shoulder belt anchor 11 is lowered below the vehicle body as shown in FIG. Accordingly, the upper support point P of the shoulder belt 3S is moved downward.

  And even if it exists in the passenger | crew protection device 1b of this 3rd Embodiment comprised in this way, when the vehicle body B rolls over like 1st Embodiment, as shown to Fig.45 (a)-(i). When the occupant M also rotates in the lateral direction together with the vehicle body B, and the seating position of the occupant M is a seat on the same direction side as the rollover direction of the vehicle body B, as shown in FIG. Is moved downward to move the upper support point P downward, and when the lateral rotation angle of the vehicle body B reaches 90 degrees (see FIG. 45C), the downward movement amount h of the upper support point P is set in advance. The set maximum downward movement position is set (see FIG. 47A).

  Further, when the seating position of the occupant M is a seat on the side opposite to the rollover direction of the vehicle body B, the shoulder belt anchor 11 is lowered and the upper support point P is moved downward in the same manner as described above. When it is determined that the lateral rotation angle of B has reached 180 degrees (see FIG. 45 (e)), the downward movement amount h of the upper support point P is set to a preset maximum downward movement position (FIG. 47 ( b)).

  Next, when the vehicle body B rotates forward, the occupant M also rotates forward together with the vehicle body B as shown in FIGS. 48 (a) to 48 (i), and the anchor rail 52 is moved as shown in FIG. 49 (b). When the upper support point P is moved rearward by moving parallel to the rear of the vehicle body and the forward rotation angle of the vehicle body B reaches 90 degrees (see FIG. 48C), the rearward movement amount l of the upper support point P Is set to the preset maximum rearward movement position (see FIG. 50 (a)), and at this time, the shoulder belt anchor 11 is lowered and the upper support point P is set to the lower side of the vehicle body as shown in FIG. 49 (c). When the forward rotation angle of the vehicle body B reaches 180 degrees (see FIG. 48 (e)), the downward movement amount of the upper support point P is set to the preset maximum downward movement position (FIG. 50 ( b)).

  Further, when the vehicle body B rotates backward, as shown in FIGS. 51A to 51I, the occupant M also rotates rearward together with the vehicle body B, and the rearward rotation angle of the vehicle body B reaches 90 degrees (FIG. 51). 51 (c)), as shown in FIG. 52 (b), the shoulder belt anchor 11 is lowered and the upper support point P is moved downward, and the rearward rotation angle of the vehicle body B reaches 180 degrees. When this occurs (see FIG. 51 (e)), the downward movement amount of the upper support point P is set to a preset maximum downward movement position (see FIG. 53 (a)), and as shown in FIG. 52 (c). When the anchor rail 52 moves in parallel to the rear of the vehicle body and the upper support point P moves to the rear of the vehicle body, and the rearward rotation angle of the vehicle body B reaches 270 degrees (see FIG. 51 (g)), the upper support point P Is set to a preset maximum rearward movement position (see FIG. 53B).

  Incidentally, even in the occupant protection device 1b of the third embodiment, the upper support point P of the shoulder belt 3S is controlled to move with a predetermined algorithm. This algorithm is the same as the algorithm of the first embodiment shown in FIG. Since this is the same control, this embodiment omits the assumption that the algorithm of the first embodiment is used.

  With the above configuration, according to the passenger protection device 1b of the third embodiment, the vehicle body tilt sensor 30 and the tilt direction sensor 31 detect the rollover direction of the vehicle body B and the rotation angle at the time of rollover, as in the first embodiment. Thus, the behavior of the occupant M can be estimated, and according to the behavior of the occupant M, the shoulder belt anchor 11 is moved downward by at least one of the downward moving means 10a and the backward moving means 20, and the upper support point P of the shoulder belt 3S is moved downward. In addition, the anchor rail 52 is translated rearward and the upper support point P is controlled to move rearward, so that the restraint direction of the occupant M by the shoulder belt 3S acts on the occupant M according to the rotational direction. The movement of the occupant M can be effectively constrained in the direction opposite to the centrifugal force.

  Further, by detecting the positions of the left and right seats 2 on which the occupant is seated by the weight sensor 32 provided on the seat cushion 2A, the occupant can be restrained appropriately according to the seating position of the occupant M. When B rolls over in the lateral direction or the front-rear direction, regardless of the seating position of the occupant M, the occupant M is reliably restrained from moving in the left-right direction, forward and upward, and the occupant M interferes with the vehicle interior components. It is possible to prevent or suppress the occupant protection function.

  54 to 71 show a fourth embodiment of the present invention, in which the same components as those in the first to third embodiments are denoted by the same reference numerals and redundant description is omitted, and FIG. FIG. 55 is a perspective view of the right side seat constituting the occupant protection device, and FIG. 56 is a perspective view showing the downward moving means in the upper part of (a) and the lower part of (b). 57 is a perspective view of the operating state showing the upper part of the downward moving means, FIG. 58 is a sectional view showing the downward moving means by the upper part of (a) and the lower part of (b), and FIG. 59 shows the locked state of the downward moving means. 60 is a main part perspective view showing the locked state of the downward moving means, FIG. 61 is a front view of the main part showing the unlocked state of the downward moving means, and FIG. 62 is a perspective view showing the function of the downward moving means. 63 is an explanatory view showing the occupant's behavior image at the time of lateral rollover in order, FIG. FIG. 65 is a perspective view showing the operation of the shoulder belt at the time of overturning in the lateral direction before the operation of (a) and after the completion of the operation of (b), and FIG. FIG. 66 is a graph showing the relationship between the rotation angle and (a) when the occupant seating position coincides with the lateral rollover direction and (b) when the occupant seating position is on the opposite side of the lateral rollover direction. FIG. 67 is an explanatory diagram showing step by step an image of the behavior of an occupant during forward rollover, and FIG. 67 shows the operation of the shoulder belt during rollover before (a) during operation, (b) during operation, and (c) after completion of operation. 68 is a perspective view showing the movement of the upper support point of the shoulder belt at the time of overturning, (a) the relationship between the rearward movement amount and the vehicle body rotation angle, and (b) the relationship between the lower movement amount and the vehicle body rotation angle. In the graph shown in FIG. 69, the behavior image of the occupant during the overturning is shown in order. FIG. 70 is a perspective view showing the operation of the shoulder belt at the time of overturning before and after the operation of (a), after the operation of (b) and after the completion of the operation of (c), and FIG. 6 is a graph showing the movement of the upper support point of the shoulder belt at the time in the relationship between the downward movement amount and the vehicle body rotation angle in (a) and the relationship between the backward movement amount and the vehicle body rotation angle in (b).

  The passenger protection device 1c of the fourth embodiment has substantially the same function as that of the first embodiment, the downward movement means 10a has the same configuration as that of the second embodiment, and the rear movement means 20a has a third structure. The configuration is the same as that of the embodiment.

  As shown in FIG. 54, the vehicle B to which the occupant protection device 1c of the fourth embodiment is applied has a shoulder belt 3S that obliquely restrains the upper body of the occupant M seated on the seat 2 as in the first embodiment. The upper support point P of the shoulder belt 3S is moved downward by the lower moving means 10a and moved rearward by the rear moving means 20a.

  Further, as in the first embodiment, the occupant protection device 1c detects the rollover or forward rotation and reverse rotation of the vehicle body B with the vehicle body tilt sensor 30 as the vehicle overturn detection means, and the vehicle body B rolls over or forward and reverse. The rotation state at the time of rolling is detected by the vehicle body inclination sensor 30 and the inclination direction sensor 31 as the vehicle body rotation angle detection means, and the left and right seat positions where the occupant M is seated are detected by the weight sensor 32 as the seating position detection means. The signals of these sensors 30, 31, and 32 are processed by the controller 33, and drive signals are output to the downward moving means 10a and the backward moving means 20a.

  Here, the downward movement means 10a of the fourth embodiment has the same configuration as that of the second embodiment as shown in FIGS. 54 to 62. By moving the anchor cover 40 downward, the upper support of the shoulder belt 3S is supported. The point P is moved downward, and the third rotary electric actuator 41 is used as the drive source.

  Further, as shown in FIGS. 54 and 55, the rearward movement means 20a has the same configuration as that of the third embodiment. By providing the upper rail 50 and the lower rail 51 and translating the anchor rail 52 rearward, The upper support point P of the belt 3S is moved rearward of the vehicle body, and the second rotary electric actuator 25 (see FIG. 39) is used as the drive source.

  The specific structures of the downward moving means 10a and the backward moving means 20a are the same as those of the second embodiment and the third embodiment, and the same components are denoted by the same reference numerals and redundant description is omitted. .

  Even in the passenger protection device 1c of the fourth embodiment configured as described above, when the vehicle body B rolls over as in the first embodiment, as shown in FIGS. 63 (a) to (i). When the occupant M also rotates laterally together with the vehicle body B, and the seating position of the occupant M is a seat on the same direction side as the rollover direction of the vehicle body B, as shown in FIG. When the upper support point P is lowered and moved downward in the vehicle body and the lateral rotation angle of the vehicle body B reaches 90 degrees (see FIG. 63C), the downward movement amount h of the upper support point P is set in advance. The maximum downward movement position is set (see FIG. 65 (a)).

  Further, when the seating position of the occupant M is a seat on the side opposite to the rollover direction of the vehicle body B, the anchor cover 40 is lowered and the upper support point P is moved downward in the same manner as described above. Is determined to have reached 180 degrees (see FIG. 63E), the downward movement amount h of the upper support point P is set to a preset maximum downward movement position (FIG. 65B). )reference).

  Next, when the vehicle body B rotates forward, the occupant M also rotates forward together with the vehicle body B as shown in FIGS. 66 (a) to 66 (i), and the anchor rail 52 is moved as shown in FIG. 67 (b). When the upper support point P is moved rearward by moving parallel to the rear of the vehicle body and the forward rotation angle of the vehicle body B reaches 90 degrees (see FIG. 66C), the rearward movement amount l of the upper support point P Is set to a preset maximum rearward movement position (see FIG. 68 (a)), and at this time, the anchor cover 40 is lowered, and the upper support point P is set to the lower side of the vehicle body as shown in FIG. 67 (c). When the forward rotation angle of the vehicle body B reaches 180 degrees (see FIG. 66 (e)), the downward movement amount of the upper support point P is set to a preset maximum downward movement position (FIG. 68 (b)). )reference).

  Further, when the vehicle body B rotates backward, as shown in FIGS. 69A to 69I, when the occupant M also rotates rearward together with the vehicle body B, the rearward rotation angle of the vehicle body B reaches 90 degrees (FIG. 69 (c)), as shown in FIG. 70 (b), the anchor cover 40 is lowered and the upper support point P is moved downward, and the rearward rotation angle of the vehicle body B reaches 180 degrees. At the time (see FIG. 69 (e)), the downward movement amount of the upper support point P is set to a preset maximum downward movement position (see FIG. 71 (a)), and as shown in FIG. 70 (c), When the anchor rail 52 is translated rearward of the vehicle body and the upper support point P is moved rearward of the vehicle body, and the rearward rotation angle of the vehicle body B reaches 270 degrees (see FIG. 69 (g)), the upper support point P The backward movement amount is set to a preset maximum backward movement position (see FIG. 71 (b)).

  By the way, even in the passenger protection device 1c of the fourth embodiment, the upper support point P of the shoulder belt 3S is controlled to move with a predetermined algorithm. This algorithm is the same as the algorithm of the second embodiment shown in FIG. Since this is the same control, this embodiment omits the assumption that the algorithm of the second embodiment is used.

  With the above configuration, according to the passenger protection device 1c of the fourth embodiment, the overturning direction of the vehicle body B and the rotation angle at the time of overturning are detected by the vehicle body inclination sensor 30 and the inclination direction sensor 31, as in the first embodiment. Thus, the behavior of the occupant M can be estimated, and the anchor cover 40 is moved downward by at least one of the downward moving means 10a and the backward moving means 20a according to the behavior of the occupant M, and the upper support point P of the shoulder belt 3S is moved downward. The movement control is performed, and the anchor rail 52 is translated rearward to control the movement of the upper support point P rearward of the vehicle body, whereby the restraining direction of the occupant M by the shoulder belt 3S acts on the occupant M according to the rotation direction. The movement of the occupant M can be effectively restrained in the direction opposite to the centrifugal force.

  Further, by detecting the positions of the left and right seats 2 on which the occupant is seated by the weight sensor 32 provided on the seat cushion 2A, the occupant can be restrained appropriately according to the seating position of the occupant M. When B rolls over in the lateral direction or the front-rear direction, regardless of the seating position of the occupant M, the occupant M is reliably restrained from moving in the left-right direction, forward and upward, and the occupant M interferes with the vehicle interior components. It is possible to prevent or suppress the occupant protection function.

  By the way, the occupant protection devices 1, 1a, 1b, and 1c shown in the first to fourth embodiments of the present invention use rotary electric actuators as drive sources for the respective downward moving means 10 and 10a and backward moving means 20 and 20a. However, the present invention is not limited to this, and although not shown, an explosive actuator that provides driving force by explosion and a rotary electric actuator are used in combination, so that the rotational amount of the shoulder belt 3S and the pulling force of the shoulder belt 3S can be reduced. Can be controlled arbitrarily and continuously according to the rotation angle and rotation direction of the vehicle body B, and the movement of the occupant can be restrained instantaneously by the explosive actuator, thereby further improving the occupant protection function. it can.

  The occupant protection device of the present invention has been described by taking the first to fourth embodiments as examples. However, the present invention is not limited to this, and various other embodiments can be adopted without departing from the gist of the present invention. it can.

The side view of the vehicle which removes and shows the door for convenience in a 1st embodiment of the present invention. The perspective view of the right side seat which comprises the passenger | crew protection device in 1st Embodiment of this invention. The perspective view which shows the downward movement means in 1st Embodiment of this invention by the upper part of (a) and the lower part of (b). Sectional drawing which shows the downward movement means in 1st Embodiment of this invention by the upper part of (a) and the lower part of (b). The perspective view which shows the function of the downward movement means in 1st Embodiment of this invention. The perspective view which shows the back movement means in 1st Embodiment of this invention. The perspective view which shows the function of the back movement means in 1st Embodiment of this invention. Explanatory drawing which shows order for the passenger | crew's behavior image at the time of the horizontal rollover in 1st Embodiment of this invention. The perspective view which shows the operation | movement of the shoulder belt at the time of the horizontal rollover in 1st Embodiment of this invention before the operation | movement of (a) and the completion of the operation | movement of (b). In the first embodiment of the present invention, the relationship between the downward movement amount of the upper support point of the shoulder belt and the vehicle body rotation angle at the time of the lateral rollover in FIG. ) Is a graph showing the case where the occupant seating position is on the side opposite to the lateral rollover direction. Explanatory drawing which shows order for the passenger | crew's behavior image at the time of forward rollover in 1st Embodiment of this invention. The perspective view which shows the action | operation of the shoulder belt at the time of the overturn in 1st Embodiment of this invention before the operation | movement of (a), the operation | movement middle of (b), and the completion of the operation | movement of (c). The movement of the upper support point of the shoulder belt at the time of overturning in the first embodiment of the present invention is the relationship between the rearward movement amount and the vehicle body rotation angle in (a), and the relationship between the lower movement amount and the vehicle body rotation angle in (b). And a graph. Explanatory drawing which shows order for the passenger | crew's behavior image at the time of the overturning in 1st Embodiment of this invention later on. The perspective view which shows the action | operation of the shoulder belt at the time of reverse rollover in 1st Embodiment of this invention before the operation | movement of (a), the operation | movement middle of (b), and the completion of the operation | movement of (c). In the first embodiment of the present invention, the movement of the upper support point of the shoulder belt at the time of overturning is related to the relationship between the downward movement amount and the vehicle body rotation angle in (a) and the relationship between the backward movement amount and the vehicle body rotation angle in (b). And a graph. Explanatory drawing which shows the control procedure of the passenger | crew protection apparatus in 1st Embodiment of this invention with an algorithm. The side view of the vehicle which removes and shows the door for convenience in 2nd Embodiment of this invention. The perspective view of the right side seat which comprises the passenger | crew protection device in 2nd Embodiment of this invention. The perspective view which shows the downward movement means in 2nd Embodiment of this invention by the upper part of (a) and the lower part of (b). The perspective view of the operation state which shows the upper part of the downward movement means in 2nd Embodiment of this invention. Sectional drawing which shows the downward movement means in 2nd Embodiment of this invention by the upper part of (a) and the lower part of (b). Sectional drawing which shows the locked state of the downward movement means in 2nd Embodiment of this invention. The principal part perspective view which shows the locked state of the downward movement means in 2nd Embodiment of this invention. The principal part front view which shows the lock release state of the downward movement means in 2nd Embodiment of this invention. The perspective view which shows the function of the downward movement means in 2nd Embodiment of this invention. Explanatory drawing which shows order for the passenger | crew's behavior image at the time of the horizontal rollover in 2nd Embodiment of this invention later on. The perspective view which shows the action | operation of the shoulder belt at the time of the horizontal rollover in 2nd Embodiment of this invention before the operation | movement of (a) and the completion of the operation | movement of (b). In the second embodiment of the present invention, the relationship between the downward movement amount of the upper support point of the shoulder belt and the vehicle body rotation angle at the time of overturning in the lateral direction is (a), and the case where the occupant seating position coincides with the lateral overturning direction (b) ) In the case where the occupant seating position is on the side opposite to the lateral rollover direction. Explanatory drawing which shows order for the passenger | crew's behavior image at the time of forward rollover in 2nd Embodiment of this invention. The perspective view which shows the action | operation of the shoulder belt at the time of the overturn in 2nd Embodiment of this invention before the operation | movement of (a), the operation | movement middle of (b), and after completion | finish of the operation | movement of (c). The movement of the upper support point of the shoulder belt at the time of overturning in the second embodiment of the present invention is the relationship between the rearward movement amount and the vehicle body rotation angle in (a), and the relationship between the lower movement amount and the vehicle body rotation angle in (b). And a graph. Explanatory drawing which shows order for the passenger | crew's behavior image at the time of rear capsizing in 2nd Embodiment of this invention. The perspective view which shows the action | operation of the shoulder belt at the time of reverse rollover in 2nd Embodiment of this invention before the operation | movement of (a), the operation | movement middle of (b), and the completion of the operation | movement of (c). In the second embodiment of the present invention, the movement of the upper support point of the shoulder belt at the time of reverse rollover is shown in (a) the relationship between the downward movement amount and the vehicle body rotation angle, and (b) the relationship between the backward movement amount and the vehicle body rotation angle. And a graph. Explanatory drawing which shows the control procedure of the passenger | crew protection apparatus in 2nd Embodiment of this invention with an algorithm. The side view of the vehicle which removes and shows the door for convenience in a 3rd embodiment of the present invention. The perspective view of the right side seat which comprises the passenger | crew protection device in 3rd Embodiment of this invention. The perspective view which shows the back movement means in 3rd Embodiment of this invention by the upper part of (a) and the lower part of (b). The perspective view which looked at the lower part of the back movement means in 3rd Embodiment of this invention from the downward direction. The perspective view which shows the operating state of the back movement means in 3rd Embodiment of this invention. The perspective view which shows the downward moving means in 3rd Embodiment of this invention by the upper part of (a) and the lower part of (b). Sectional drawing which shows the downward movement means in 3rd Embodiment of this invention by the upper part of (a) and the lower part of (b). The perspective view which shows the operating state of the downward movement means in 3rd Embodiment of this invention. Explanatory drawing which shows order for the passenger | crew's behavior image at the time of the horizontal rollover in 3rd Embodiment of this invention later on. The perspective view which shows the action | operation of the shoulder belt at the time of the horizontal rollover in 3rd Embodiment of this invention before the operation | movement of (a) and the completion of the operation | movement of (b). In the third embodiment of the present invention, the relationship between the downward movement amount of the upper support point of the shoulder belt and the vehicle body rotation angle at the time of overturning in the lateral direction is (a), and the case where the occupant seating position coincides with the lateral overturning direction (b) ) In the case where the occupant seating position is on the side opposite to the lateral rollover direction. Explanatory drawing which shows order for the passenger | crew's behavior image at the time of forward rollover in 3rd Embodiment of this invention. The perspective view which shows the action | operation of the shoulder belt at the time of the overturn in 3rd Embodiment of this invention before the action | operation of (a), the middle of the action | operation of (b), and after completion | finish of the action | operation of (c). The movement of the upper support point of the shoulder belt at the time of overturning in the third embodiment of the present invention is the relationship between the rearward movement amount and the vehicle body rotation angle in (a), and the relationship between the lower movement amount and the vehicle body rotation angle in (b). And a graph. Explanatory drawing which shows order for the passenger | crew's behavior image at the time of rear capsizing in 3rd Embodiment of this invention. The perspective view which shows the action | operation of the shoulder belt at the time of the overturn in 3rd Embodiment of this invention before the operation | movement of (a), the operation | movement middle of (b), and after the completion | finish of operation | movement of (c). In the third embodiment of the present invention, the movement of the upper support point of the shoulder belt at the time of overturning is related to the relationship between the downward movement amount and the vehicle body rotation angle in (a) and the relationship between the backward movement amount and the vehicle body rotation angle in (b). And a graph. The side view of the vehicle which removes and shows the door for convenience in 4th Embodiment of this invention. The perspective view of the right side seat which comprises the passenger | crew protection device in 4th Embodiment of this invention. The perspective view which shows the downward movement means in 4th Embodiment of this invention by the upper part of (a) and the lower part of (b). The perspective view of the operation state which shows the upper part of the downward movement means in 4th Embodiment of this invention. Sectional drawing which shows the downward movement means in 4th Embodiment of this invention by the upper part of (a) and the lower part of (b). Sectional drawing which shows the locked state of the downward movement means in 4th Embodiment of this invention. The principal part perspective view which shows the locked state of the downward movement means in 4th Embodiment of this invention. The principal part front view which shows the lock release state of the downward movement means in 4th Embodiment of this invention. The perspective view which shows the function of the downward movement means in 4th Embodiment of this invention. Explanatory drawing which shows order for the passenger | crew's behavior image at the time of the horizontal rollover in 4th Embodiment of this invention later on. The perspective view which shows the action | operation of the shoulder belt at the time of the horizontal rollover in 4th Embodiment of this invention before the operation | movement of (a) and the completion of the operation | movement of (b). The relationship between the downward movement amount of the upper support point of the shoulder belt and the vehicle body rotation angle during lateral rollover in the fourth embodiment of the present invention is shown in (a) when the occupant seating position coincides with the lateral rollover direction (b) ) In the case where the occupant seating position is on the side opposite to the lateral rollover direction. Explanatory drawing which shows order for the passenger | crew's behavior image at the time of forward rollover in 4th Embodiment of this invention. The perspective view which shows the action | operation of the shoulder belt at the time of the overturning in 4th Embodiment of this invention before the operation | movement of (a), the operation | movement middle of (b), and the completion of the operation | movement of (c). The movement of the upper support point of the shoulder belt at the time of overturning in the fourth embodiment of the present invention is the relationship between the backward movement amount and the vehicle body rotation angle in (a), and the relationship between the downward movement amount and the vehicle body rotation angle in (b). And a graph. Explanatory drawing which shows order for the passenger | crew's behavior image at the time of rear capsizing in 4th Embodiment of this invention. The perspective view which shows the action | operation of the shoulder belt at the time of the overturn in 4th Embodiment of this invention before the operation | movement of (a), the operation | movement middle of (b), and after completion | finish of the operation | movement of (c). In the fourth embodiment of the present invention, the movement of the upper support point of the shoulder belt at the time of overturning is related to the relationship between the downward movement amount and the vehicle body rotation angle in (a) and the relationship between the backward movement amount and the vehicle body rotation angle in (b). And a graph.

Explanation of symbols

1, 1a, 1b, 1c Occupant protection device 2 Seat 3 Seat belt 3S Shoulder belt 10, 10a Downward moving means 18 First rotary electric actuator 20, 20a Backward moving means 25 Second rotary electric actuator 30 Car body inspection sensor (car body rollover detection means)
31 Inclination direction sensor (vehicle rotation angle detection means)
32 Weight sensor (sitting position detection means)
41 Third rotary electric actuator B Car body P Upper support point M Crew

Claims (7)

In the occupant protection device comprising a shoulder belt that restrains the upper body of the occupant seated on the seat diagonally from one side of the waist to the other side of the shoulder,
An upper support point of the shoulder belt, a downward movement means for moving downward in the vehicle body and a backward movement means for moving backward in the vehicle body;
Vehicle body rollover detection means for detecting lateral rollover of the vehicle body, front and rear rollover,
A vehicle body rotation angle detection means for detecting a rotation state at the time of lateral rollover of the vehicle body and front and rear rollover;
Seating position detection means for detecting the left and right seat positions where the occupant is seated, and
Based on the signals from the vehicle body rollover detection means and the vehicle body rotation angle detection means, the behavior of the occupant when the vehicle body is rotated by rollover is estimated, and the seating position is determined from the signal from the seating position detection means, The occupant protection device according to claim 1, wherein the occupant protection device controls the movement so as to restrain the centrifugal force acting on the occupant by a shoulder belt by operating the downward movement means and / or the backward movement means. When the vehicle body rolls over in the lateral direction, if the seating position of the occupant is a seat on the same side as the lateral rollover direction of the vehicle body, the lower moving means is operated to move the upper support point to the lower side of the vehicle body. When the direction rotation angle reaches 90 degrees, the downward movement amount of the upper support point is set to the preset maximum downward movement position,
When the seating position of the occupant is on the side opposite to the lateral rollover direction of the vehicle body, the downward movement means is operated to move the upper support point downward, and the lateral rotation angle of the vehicle body reaches 180 degrees. When it is determined that the upper support point downward movement amount is set to a preset maximum downward movement position,
When the vehicle body rolls forward, the rearward moving means is operated to move the upper support point to the rear of the vehicle body, and when the forward rotation angle of the vehicle body reaches 90 degrees, the rearward movement amount of the upper support point is set to a preset maximum. At the same time, the downward movement means is operated to move the upper support point downward in the vehicle body. When the forward rotation angle of the vehicle body reaches 180 degrees, the downward movement amount of the upper support point is set in advance. Set to the set maximum downward movement position,
When the vehicle rolls over backwards, when the rearward rotation angle of the vehicle body reaches 90 degrees, the downward movement means is operated to move the upper support point downward, and the rearward rotation angle of the vehicle body reaches 180 degrees. In this case, the downward movement amount of the upper support point is set to a preset maximum downward movement position, and the backward movement means is operated to move the upper support point to the rear of the vehicle body, so that the rearward rotation angle of the vehicle body reaches 270 degrees. The occupant protection device according to claim 1, wherein the rearward movement amount of the upper support point is set to a preset maximum rearward movement position.   The occupant protection device according to claim 1 or 2, wherein each of the downward movement means and the backward movement means includes a rotary electric actuator and is driven by each rotation.   The occupant protection device according to claim 1 or 2, wherein the downward moving means and the backward moving means use in combination an explosive actuator that gives a driving force by explosion and a rotary electric actuator.   The body rollover detection means is a vehicle body tilt sensor that estimates the tilt angle of the vehicle body, and determines that the vehicle body is in a rollover state when the tilt angle detected by the vehicle body tilt sensor exceeds a preset threshold value. The occupant protection device according to any one of claims 1 to 4.   The vehicle body rotation angle detecting means includes a vehicle body inclination sensor for estimating the vehicle body inclination angle and a vehicle inclination sensor for estimating the vehicle body rotation direction, and the vehicle body rotation angle is determined from the detection signals of the vehicle body inclination sensor and the inclination direction sensor. The occupant protection device according to any one of claims 1 to 5, wherein the occupant protection device is determined. The occupant protection device according to any one of claims 1 to 6, wherein the seating position detection means is a weight sensor provided on the seat cushion, and senses the weight of the occupant to determine whether or not the user is seated.

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