JP2019104381A - Occupant protection device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a vehicle occupant protection device capable of reducing a load acting on a occupant's waist from a lap belt at the time of a far side side collision with a simple structure. SOLUTION: A vehicle occupant protection device 10 is provided with a webbing 24 provided with a shoulder belt 24A and a lap belt 24B to restrain an occupant P seated on a vehicle seat 12, and a webbing provided at an end portion of the lap belt 24B. When the seatbelt device 14 including the winding device 26 for winding the 24 and the far side side collision of the vehicle are detected or predicted, the winding device 26 is operated to wind the webbing 24. The control unit 18 that pulls the buckle 30 and the vehicle seat 12 are arranged in a folded state, one end is connected to the buckle 30 and the other end is fixed to the vehicle body 38 or the seat cushion 20A, and the buckle. It has a protective member 16 that expands laterally to the waist L of the occupant P when the 30 is pulled. [Selection diagram] Fig. 1

Description

  The present invention relates to a vehicle occupant protection device.

  Patent Document 1 discloses an occupant restraint system in which an airbag is deployed between a center console and an occupant to restrain the occupant.

JP 2012-81958 A

  In the structure of Patent Document 1, the air bag is sandwiched between the center console and the occupant at the time of a side collision, so that the movement of the occupant's waist is suppressed and the local application of load from the lap belt to the waist is suppressed. can do. However, there is room for improvement from the viewpoint of reducing the load acting from the lap belt to the waist of the occupant at the time of a side collision with a simpler structure.

  An object of the present invention is to provide a vehicle occupant protection device capable of reducing the load acting from the lap belt to the waist of the occupant at the time of a far side collision with a simple structure in consideration of the above fact.

  A vehicle occupant protection device according to the invention according to the first aspect comprises a webbing provided with a shoulder belt and a lap belt for restraining an occupant seated on a vehicle seat, and provided at an end of the lap belt. A seat belt device including a take-up device for taking up the webbing, and a buckle by operating the take-up device to take up the webbing when a far-side collision of the vehicle is detected or predicted And a control unit for pulling the vehicle seat, and one end is connected to the buckle, the other end is fixed to the vehicle body or the seat cushion, and the buckle is pulled, and the occupant is And a protective member deployed on the side of the waist of the body.

  According to the first aspect of the present invention, the seat belt device is configured to include the webbing and the winding device, and the webbing includes the shoulder belt and the lap belt. That is, it is considered as a three-point seat belt device. In addition, when a far side collision of the vehicle is detected or predicted, the webbing is wound up by the control unit activating the winding device. This can increase the restraint on the occupant.

  Moreover, the protection member is arrange | positioned in the folded state by the side of the vehicle seat. Here, one end of the protection member is connected to the buckle, and the other end of the protection member is fixed to the vehicle body or the seat cushion. Then, when a side collision on the far side of the vehicle is detected or predicted, the control device operates the winding device and pulls the buckle, whereby the protective member is deployed on the side of the occupant's waist. Thereby, the inertial movement of the waist of the occupant can be suppressed by the protective member, and the local application of a load from the lap belt to the waist can be suppressed. That is, it is possible to reduce the load acting from the lap belt to the waist of the occupant at the time of a side collision on the far side without using parts such as an inflator and an air bag.

  As described above, according to the vehicle occupant protection device of the first aspect, it is possible to reduce the load acting on the waist of the occupant from the lap belt at the time of a side collision with a far side with a simple structure. Have.

FIG. 2 is a partially broken front view of a vehicle seat to which the vehicle occupant protection device according to the embodiment is applied, showing a state in which the vehicle occupant protection device is activated. FIG. 2 is a partially cutaway side view of a vehicle seat to which the vehicle occupant protection device according to the embodiment is applied, showing a state in which the vehicle occupant protection device is activated. It is a figure corresponding to FIG. 1 which shows the state before the passenger | crew protection apparatus for vehicles operate | moves. It is a figure corresponding to FIG. 2 which shows the state before the passenger | crew protection apparatus for vehicles operate | moves. (A) is a side view which expands and shows the state before the support belt which concerns on embodiment expand | deploys, (B) is sectional drawing which shows the state cut | disconnected by 5B-5B line | wire of (A). . 1 is a perspective view of a vehicle seat to which a vehicle occupant protection device according to an embodiment is applied. It is an expanded sectional view of a support belt which shows the modification of the crew member protection device for vehicles concerning an embodiment.

  Hereinafter, the vehicle occupant protection device 10 according to the embodiment will be described with reference to the drawings. In addition, arrow FR suitably shown in each figure shows a sheet | seat front direction, arrow UP shows a sheet | seat upper direction, and arrow RH has shown the sheet | seat right side. Hereinafter, in the description using the front, rear, left, and right directions, unless otherwise noted, the front and rear directions of the seat, the left and right of the seat width direction, and the up and down directions of the seat are shown. Further, in the present embodiment, as an example, the seat front side matches the vehicle front side, and the seat width direction matches the vehicle width direction.

  As shown in FIG. 1, the vehicle occupant protection device 10 according to the present embodiment includes a seat belt device 14 provided on a vehicle seat 12, a support belt 16 as a protection member, and an ECU (control unit) And Electronic Control Unit) 18.

  As shown in FIG. 6, the vehicle seat 12 is a three-seat bench seat provided in the second and subsequent rows of the vehicle. The vehicle seat 12 is configured to include a first seat 20, a second seat 22, and a third seat (not shown) arranged side by side in the seat width direction.

  The first seat 20 constitutes a seat right side of the vehicle seat 12, and includes a first seat cushion 20A and a first seat back 20B. The thighs and buttocks of the occupant P are supported by the first seat cushion 20A. Further, the lower end portion of the first seat back 20B is connected to the rear end portion of the first seat cushion 20A. The first seat back 20B extends in the vertical direction of the vehicle, and the back of the occupant P is supported by the first seat back 20B.

  The second seat 22 constitutes a central portion of the vehicle seat 12 in the seat width direction, and includes a second seat cushion 22A and a second seat back 22B. The thighs and buttocks of the occupant can be supported by the second seat cushion 22A. Further, the lower end portion of the second seat back 22B is connected to the rear end portion of the second seat cushion 22A. The second seat back 22B extends in the vertical direction of the vehicle, and the second seat back 22B is configured to be able to support the back of the occupant. Further, a third seat (not shown) is provided on the left side of the second seat 22 relative to the second seat 22. The third seat constitutes the left side of the vehicle seat 12. And a 3rd sheet | seat is comprised including a seat cushion and a seat back like the 1st sheet | seat 20 and the 2nd sheet | seat 22. As shown in FIG.

  A seat belt device 14 is provided to the vehicle seat 12 configured as described above. As shown in FIG. 3, the seat belt device 14 is provided on the first sheet 20 and includes a webbing 24 and a retractor 26 as a winding device. Further, the webbing 24 includes a shoulder belt 24A and a lap belt 24B, and the occupant P is restrained to the first seat 20 (vehicle seat 12) by the shoulder belt 24A and the lap belt 24B.

  Specifically, the shoulder belt 24A extends diagonally from the shoulder S on the right side of the occupant P toward the waist L on the left side, and the lower end of the shoulder belt 24A is inserted into the tongue plate 28. Then, the tongue plate 28 is engaged with the buckle 30, so that the shoulder belt 24A restrains the upper body of the occupant P. On the other hand, the wrap belt 24B extends from the tongue plate 28 to the right side of the seat, and the end of the wrap belt 24B is wound around the retractor 26. The waist portion L of the occupant P is restrained by the lap belt 24B. Thus, the seat belt device 14 of this embodiment is a three-point seat belt device.

  The retractor 26 is attached to the vehicle body or the vehicle seat 12, and inside the retractor 26, a spool 26A around which the webbing 24 is wound is provided. Here, the retractor 26 of the present embodiment is a retractor with a pretensioner. Therefore, the spool 26A is rotated and the webbing 24 is forcibly taken up by activating the pretensioner based on a signal from the ECU 18, which will be described later, in the event of a vehicle collision or the like. As the pretensioner, for example, a pyrotechnic type can be used. In this case, when a collision of the vehicle is detected, the spool 26A is rotated by ignition of the explosive.

  Here, a support belt 16 is disposed between the first sheet 20 and the second sheet 22. As shown in FIGS. 5 (A) and 5 (B), the support belt 16 is provided with a folding portion 16A folded in a bellows shape such that the sheet vertical direction is the stacking direction, and this folding portion 16A Is sewn at two seam portions S1 at the front and back. Thus, the unfolding of the folding portion 16A of the support belt 16 is suppressed.

  Further, the lower end portion of the folding portion 16A is fixed to a floor panel 38 as a vehicle body via a base plate 36. The base plate 36 is a plate-like metal member, and two base plates 36 are provided at intervals in the sheet longitudinal direction. The folding portions 16A are disposed on the respective base plates 36. Although not shown, the lower end portion of the folding portion 16A is fastened to the floor panel 38 together with the base plate 36 by a stud bolt.

  Furthermore, the upper portion of the support belt 16 is not folded but is a tip portion 16B extended in the sheet vertical direction. Here, as shown by a phantom line (two-dot chain line) in FIG. 5A, the support belt 16 in the unfolded state is formed in a substantially triangular shape with the upper side of the sheet as a vertex when viewed from the sheet side. For this reason, the support belt 16 is formed such that the width in the sheet longitudinal direction becomes gradually shorter toward the upper side of the sheet, and the tip portion 16B has a length in the sheet longitudinal direction shorter than the folding portion 16A. ing.

  As shown in FIG. 4, a buckle 30 is attached to the tip end 16 </ b> B of the support belt 16. Specifically, the buckle 30 includes an engaged portion 30A with which the tongue plate 28 is engaged, and an extending portion (buckle stay) 30B extended from the engaged portion 30A to the seat lower side. It is configured. The extension 30 B of the buckle 30 is attached to the tip 16 B of the support belt 16.

  As shown in FIG. 3, the engaged portion 30 </ b> A of the buckle 30 is fixed to the upper end portion of the bracket 42 having an L-shaped cross section. And the bending part 42A bent along the floor panel 38 is formed in the lower end part of the bracket 42, This bending part 42A is fastened to the floor panel 38 by the fastening member which is not shown in figure.

  Here, a lock release mechanism (not shown) is provided in the engaged portion 30A of the buckle 30, and the lock release mechanism is electrically connected to the ECU 18. Then, the lock release mechanism is activated based on a signal from the ECU 18, whereby the fixed state of the engaged portion 30A of the buckle 30 and the bracket 42 is released. That is, the engaged portion 30A is configured to be disengaged from the bracket 42. An actuator such as a solenoid can be used as an example of the lock release mechanism.

  A side collision sensor (not shown) is electrically connected to the ECU 18 shown in FIG. The side collision sensor is configured to detect or predict a far-side side collision of the vehicle and output a signal to the ECU 18. When a side collision of the vehicle is detected or predicted by the side collision sensor, the lock release mechanism operates to release the fixed state of the engaged portion 30A of the buckle 30 and the bracket 42. Further, the pretensioner of the retractor 26 is operated, and the spool 26A is rotated to forcibly wind the lap belt 24B (webbing 24). As a result, as shown in FIGS. 1 and 2, the buckle 30 is pulled. As a result, the seam portion S1 (see FIG. 5 (B)) of the support belt 16 is broken, and the support belt 16 is developed toward the seat upper side. Then, the side of the waist L of the occupant P is covered by the support belt 16.

(Action and effect)
Next, the operation and effects of the present embodiment will be described.

  In the vehicle occupant protection device 10 according to the present embodiment, the seat belt device 14 is configured to include the webbing 24 and the retractor 26. The seat belt device 14 includes the shoulder belt 24A and the lap belt 24B. It is a three-point seat belt device. Then, when a far-side side collision of the vehicle is detected or predicted, the webbing 24 is wound up by activating the pretensioner of the retractor 26 based on the signal from the ECU 18. Thereby, the restraint to the occupant P can be enhanced.

  Also, when a side collision of the vehicle on the far side is detected or predicted, the support belt 16 folded to the side of the vehicle seat 12 moves upward as the buckle 30 moves upward. It unfolds and covers the side of the waist L of the occupant P (see FIG. 2). Thereby, the inertial movement of the waist L of the occupant P can be suppressed by the support belt 16, and the local application of a load from the lap belt 24B to the waist L can be suppressed. That is, without using parts such as an inflator and an air bag, it is possible to reduce the load acting on the waist portion L of the occupant P from the lap belt 24B at the time of a side collision with a far side with a simple structure.

  Furthermore, in the present embodiment, since the support belt 16 is disposed between the first seat cushion 20A and the second seat cushion 22A in the folded state, the support belt 16 is in the normal state before the support belt 16 is deployed. Is hard to see and does not lose design.

  As mentioned above, although the vehicle occupant protection device 10 which concerns on embodiment was demonstrated, of course in the range which does not deviate from the summary of this invention, it can implement in a various aspect. For example, as in the modification of FIG. 7, the support belt 16 may be fixed to the first seat cushion 20A.

(Modification)
As shown in FIG. 7, in this modification, the support belt 16 is housed in the case 44 in a folded state. The case 44 is formed in a substantially rectangular shape and is disposed on the side of the first seat cushion 20A.

  In addition, a base plate 48 is provided on the side wall of the case 44 on the inner side in the sheet width direction. The base plate 48 extends vertically with the sheet width direction as the thickness direction, and is fastened to the seat frame (side frame) 46 of the first seat cushion 20A in a state of being in contact with the side surface of the first seat cushion 20A. It is done.

  The seat frame 46 is provided at both ends in the seat width direction of the first seat cushion 20A, and extends in the longitudinal direction of the seat to form a framework of the first seat cushion 20A (in FIG. 7, the seat left side Only the seat frame 46 of Further, the seat frame 46 is formed in a flat, substantially U-like shape in which the center side in the width direction of the first seat cushion 20A is open when viewed from the vehicle longitudinal direction, and the vertical wall portion 46A extends in the seat vertical direction And a flange 46B extending from the upper and lower ends of the vertical wall 46A to the center in the width direction of the first seat cushion 20A.

  Here, the vertical wall portion 46A of the seat frame 46 is disposed on the opposite side of the base plate 48 with the skin 54 interposed therebetween. The base plate 48 and the case 44 are fastened to the vertical wall 46A of the seat frame 46 at two positions, upper and lower, of the upper fastening portion 50 and the lower fastening portion 52.

  The support belt 16 is configured to include a folding portion 16A housed in the case 44 and a tip portion 16B disposed outside the case 44. The folding portion 16A is folded in a bellows shape such that the sheet width direction is the stacking direction, and the base end portion (end portion of the sheet right side) of the folding portion 16A is a vertical wall 46A of the seat frame 46 together with the case 44. In the upper and lower two places.

  The end 16B of the support belt 16 is extended to the outside of the case 44 through an insertion hole (not shown) formed in the upper wall of the case 44, and the end of the end 16B is attached to the extension 30B of the buckle 30. It is done.

  As described above, in the present modification, since the support belt 16 is fastened to the seat frame 46, the support belt 16 can be supported further on the upper side of the seat compared to the structure in which the support belt 16 is fixed to the floor panel 38. Will be fixed. As a result, the load acting on the fastening portion of the support belt 16 when supporting the occupant P can be reduced, and as a result, the inertial movement of the waist L of the occupant P can be effectively suppressed at the time of a side collision with the far side. it can.

  In the above-mentioned embodiment and modification, although lock release mechanism which is not illustrated was provided in receiving part 30A of buckle 30, it is not limited to this, but other methods may be adopted. For example, the bracket 42 may be eliminated, and the extension 30B of the buckle 30 may be sewn to the first seat cushion 20A. In this case, if the sewing strength is set to break by the tension acting on the extension 30B when the pretensioner of the retractor 26 is actuated, the buckle 30 is separated from the first seat cushion 20A when the pretensioner is actuated. And the support belt 16 can be deployed.

  Moreover, in the said embodiment and modification, although the shape of the support belt 16 which is a protection member was made into the substantially triangular shape by seat side view, it is not limited to this, It is good also as another shape. For example, a substantially trapezoidal or substantially rectangular support belt may be used.

10 Vehicle occupant protection device 12 Vehicle seat 14 Seat belt device 16 Support belt (protective member)
18 ECU (control unit)
20A 1st seat cushion (seat cushion)
24 Webbing 24A Shoulder belt 24B Wrap belt 26 Retractor (take-up device)
30 buckle 38 floor panel (vehicle body)
P crew L waist

Claims (1)

A seat belt device comprising a webbing including a shoulder belt and a lap belt for restraining an occupant seated on a vehicle seat, and a winding device provided at an end of the lap belt for winding the webbing. When,
A control unit that pulls a buckle by activating the winding device and winding the webbing when a far-side collision of the vehicle is detected or predicted;
The vehicle seat is arranged in a folded state, one end is connected to the buckle, the other end is fixed to a vehicle body or a seat cushion, and the buckle is pulled, so that the side of the occupant's waist is Developing protection members,
Passenger protection device for a vehicle.