JP2010058723A - Occupant restraint system for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an occupant restraint system for a vehicle capable of effectively restraining an occupant in relation to a vehicle body in a vehicle width direction by using a webbing to restrain an upper body of the occupant. <P>SOLUTION: A seat belt device 10 includes a shoulder webbing 12A to restrain the upper body of the occupant P seated in a vehicular seat 14 and a webbing driving mechanism 20. The webbing driving mechanism 20 is switched from a first state in which the shoulder webbing 12A is obliquely mounted on the upper body of the occupant P from an upper side of a shoulder part S toward a vehicle lower side to a second state in which the shoulder webbing 12A is obliquely mounted on the upper body of the occupant P from a side of the shoulder part S toward the vehicle lower side, when operated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle occupant restraint device for restraining an occupant seated on a seat.

A technique is known that extends a belt from the upper end of the seat back to the front end of the seat cushion on the outer side in the vehicle width direction with respect to the occupant when the possibility of a side collision of the vehicle increases (see, for example, Patent Document 1).
JP 2007-8194 A

  However, in the conventional technology as described above, it is necessary to provide the above-described belt and the belt extension / retraction mechanism separately from the three-point seat belt device for restraining the state of the occupant.

  In consideration of the above-described facts, the present invention provides a vehicle occupant restraint device that can effectively restrain an occupant in a vehicle width direction with respect to a vehicle body using a webbing for restraining the upper body of the occupant. Is the purpose.

  The vehicle occupant restraint device according to claim 1 is an upper body restraining webbing for restraining an upper body of an occupant seated on a seat, and the shoulder of the occupant with respect to the upper body of the occupant. From the first state in which the webbing is mounted obliquely from the top to the bottom of the vehicle, the webbing is mounted obliquely from the side of the shoulder of the occupant toward the bottom of the vehicle. A wearing state switching mechanism capable of switching to the second state.

  The vehicle occupant restraint device according to claim 1, wherein the webbing in the first state extends from above the shoulder of the seated occupant (between the shoulder and the neck) obliquely downward. Attached to the body. From this state, for example, when a backward external force is applied to the vehicle, the occupant is restrained by the seat by the webbing and is protected against the frontal collision. On the other hand, the webbing in the second state is attached to the upper body of the occupant so as to extend obliquely downward from the side of the shoulder (upper side of the arm) of the seated occupant.

  Here, for example, when an external force inward in the vehicle width direction acts on the vehicle from the shoulder side where the webbing is mounted, the occupant tries to relatively displace the vehicle (seat) outward in the vehicle width direction. In the case of taking the two states, the relative displacement of the occupant in the vehicle width direction can be restrained by webbing earlier than in the case of taking the first state (in a short time from the input of the external force).

  Thus, in the vehicle occupant restraint device according to claim 1, the upper body side of the webbing is moved by the mounting state switching mechanism to switch the webbing from the first state to the second state, thereby restraining the upper body of the occupant. Therefore, the occupant can be effectively restrained in the vehicle width direction with respect to the vehicle body using the webbing.

  The vehicle occupant restraint device according to a second aspect of the present invention is the vehicle occupant restraint device according to the first aspect, wherein the mounting state switching mechanism includes a webbing support portion in which the upper end side of the webbing is locked or inserted. From the first position positioned on the upper end side of the seat back so that the width direction of the webbing at the support position substantially matches the sheet width direction, the width direction of the webbing at the support position substantially matches the sheet vertical direction. The webbing is configured to be switched from the first state to the second state by moving the seatback to a second position located on the sheet width direction end portion side.

  In the vehicle occupant restraint device according to claim 2, the webbing support portion is configured such that the support portion of the webbing is supported by the webbing support portion from the first position where the support portion of the webbing is substantially parallel to the upper edge of the seat back. The relative displacement in the vehicle width direction with respect to the vehicle body of the occupant can be suppressed by using a state-constraining webbing with a simple configuration that moves to a second position that is substantially parallel to the side edge of the seat back.

  A vehicle occupant restraint device according to a third aspect of the present invention is the vehicle occupant restraint device according to the second aspect, wherein the wearing state switching mechanism moves the webbing when the side collision of the vehicle is detected or predicted. It is configured to switch from the first state to the second state.

  In the vehicle occupant restraint device according to the third aspect, the webbing is normally in the first state. When a side collision is detected or predicted, the webbing restraint device switches the webbing to the second state. For this reason, it is possible to effectively suppress the relative displacement of the occupant in the vehicle width direction at the time of a side collision.

  As described above, the vehicle occupant restraint device according to the present invention is excellent in that the occupant can be effectively restrained in the vehicle width direction with respect to the vehicle body using the webbing for restraining the upper body of the occupant. Have

  A seat belt device 10 as a vehicle occupant restraint device according to a first embodiment of the present invention will be described with reference to FIGS. In addition, arrow UP, arrow IN, and arrow OUT that are appropriately described in each figure indicate the inside and the outside in the vehicle width direction substantially matching the upward direction and the seat width direction of the vehicle to which the seat belt device 10 is applied, respectively.

  FIG. 2 is a schematic front view of the seat belt device 10 in a passenger restraint state. As shown in this figure, the seat belt device 10 is configured as a device for restraining an occupant P seated on a vehicle seat 14 by an occupant restraining webbing 12. If supplementing about the vehicle seat 14, the vehicle seat 14 is mainly composed of a seat cushion 16 which is a seat portion on which the occupant P is seated and a seat back 18 for supporting the upper body of the occupant P from the rear. ing.

  The webbing 12 is supported so that one end in the longitudinal direction can be wound and pulled out by a retractor (not shown) that is fixed to the vehicle body on the vehicle width direction outer side (side door SD side) with respect to the vehicle seat 14. The retractor is arranged on the upper side of the seat back, or the webbing 12 is wound around a shoulder anchor (not shown) and folded to be arranged at the lower part of the vehicle body.

  The retractor is provided with a spring that urges the webbing 12 in the winding direction, and the webbing 12 is wound around the retractor in a non-mounted state to the occupant. On the other hand, the other end in the longitudinal direction of the webbing 12 is supported by the vehicle body via a webbing anchor (not shown) outside the vehicle seat 14 in the vehicle width direction.

  A tongue plate (not shown) is provided at an intermediate portion of the webbing 12 so as to be slidable in the longitudinal direction. The tongue plate is detachable (detachable) with respect to a buckle (not shown) supported by the vehicle body on the inner side in the vehicle width direction with respect to the vehicle seat 14. When the tongue plate is not locked to the buckle device, the webbing 12 extends along the substantially vertical direction outside the vehicle seat 14 in the vehicle width direction (not shown).

  On the other hand, in the state where the tongue plate is locked to the buckle, the webbing 12 mainly restrains the upper body of the occupant P by the shoulder webbing 12A which is a part from the retractor or the shoulder anchor to the tongue plate, and the webbing anchor. The lap webbing 12B, which is a part from the to the tongue plate, mainly restrains the occupant's P waist.

  As described above, the seat belt device 10 according to this embodiment is configured as a so-called three-point seat belt device. In the seat belt device 10, the shoulder webbing 12A as the upper body restraining webbing is usually from above the shoulder S on the outer side in the vehicle width direction (shoulder and neck) of the occupant P as shown in FIG. And a tongue plate extending obliquely downward in the vertical direction and inward in the vehicle width direction and reaching the tongue plate. This normal wearing state is referred to as a first state of the shoulder webbing 12A. In the first state, the width direction of the upper end portion of the shoulder webbing 12A (the insertion portion of the webbing clip 22 described later) is substantially aligned with the vehicle width direction (along the upper edge 18A of the seat back 18).

  Then, the seat belt device 10 raises and lowers the shoulder webbing 12A from the outer side (side) in the vehicle width direction with respect to the shoulder S on the outer side in the vehicle width direction of the occupant P as shown in FIG. A webbing drive mechanism 20 as a mounting state switching mechanism for switching to a second state that extends obliquely downward in the direction of the vehicle and inward in the vehicle width direction and reaches the tongue plate locked to the buckle ing. The width direction of the upper end portion (the insertion portion of a webbing clip 22 described later) of the shoulder webbing 12A taking the second state is substantially aligned with the vehicle vertical direction (along the side edge 18B of the seat back 18).

  The webbing drive mechanism 20 includes a webbing clip 22 as a webbing support part through which the upper end side of the shoulder webbing 12A is inserted. As shown in FIGS. 1 and 2, the webbing clip 22 is formed in a substantially rectangular frame shape that is flattened in the thickness direction of the shoulder webbing 12A.

  The webbing clip 22 is configured to place the shoulder webbing 12A in the first state when the webbing clip 22 is positioned along the upper edge 18A in the vicinity of the outer end in the vehicle width direction of the seat back 18 as indicated by the imaginary line in FIGS. It is. The position of the webbing clip 22 at this time is referred to as a first position. On the other hand, as shown in FIG. 1, the webbing clip 22 is configured to place the shoulder webbing 12 </ b> A in the second state when positioned along the side edge 18 </ b> B near the upper end of the seatback 18. The position of the webbing clip 22 at this time is referred to as a second position.

  The webbing drive mechanism 20 includes a guide mechanism 24 that supports the webbing clip 22 on the seatback 18 so as to be movable between a first position and a second position. The guide mechanism 24 is configured, for example, as a rotating arm, a link, a slider, or the like whose one end is connected to the webbing clip 22 and whose other end is rotatably supported by the seat back 18. Further, the webbing drive mechanism 20 includes an actuator 26 for driving the webbing clip 22 from the first position to the second position. The actuator 26 may be one that reversibly drives the webbing clip 22 between the first position and the second position, such as a motor actuator, for example. It may be irreversibly driven from the first position to the second position.

  The webbing drive mechanism 20 is usually configured to hold the webbing clip 22 in the first position and move the webbing clip 22 to the second position in a predetermined case. That is, the seat belt device 10 is configured to switch the shoulder webbing 12A from the first state to the second state in a predetermined case.

  Specifically, the webbing drive mechanism 20 includes an ECU as a control device (not shown). The ECU is electrically connected to each of the actuator 26 and a side collision sensor for detecting or predicting a side collision of the vehicle to which the seat belt device 10 is applied. The ECU is configured to operate the actuator 26 when a side collision is detected or predicted based on a signal from the side collision sensor. Thereby, in the seatbelt apparatus 10, when the side collision of the applied vehicle is detected or predicted, the webbing clip 22 moves from the first position to the first position, and the shoulder webbing 12A moves from the first state to the second state. It is the structure switched to a state.

  The webbing clip 22 may be normally held in the first position by a holding means (not shown) or the like, and is held in the first position by using a self-locking function of a driving force transmission element constituting the actuator 26. Also good. In the configuration in which the webbing clip 22 is driven when a side collision is detected, it is preferable to use high-speed driving means such as a gas generator as the actuator 26, and the configuration in which the webbing clip 22 is driven when a side collision is predicted. Then, it is preferable to use reversible driving means such as a motor as the actuator 26. In the latter case, the ECU can be configured to return the webbing clip 22 from the second position to the first position when a side collision is avoided.

  Next, the operation of the first embodiment will be described.

  In the vehicle seat 14 to which the seat belt device 10 having the above configuration is applied, the webbing clip 22 constituting the webbing drive mechanism 20 is located at the first position, and the occupant P engages the tongue plate with the buckle. When the webbing 12 is attached, the shoulder webbing 12A is in the first state.

  From this state, for example, when a frontal collision of the vehicle to which the seat belt device 10 is applied is reached, the occupant P attempts to displace relative to the vehicle seat 14, but the webbing 12 (shoulder webbing 12A and lap webbing 12B). By being restrained by the vehicle seat 14, the forward relative displacement of the occupant P with respect to the vehicle seat 14 is suppressed. That is, the occupant P is protected by the seat belt device 10 against a frontal collision of the vehicle on which the occupant is riding.

  On the other hand, in the seat belt device 10, when a side collision of the vehicle is detected or predicted, the ECU operates the actuator 26 of the webbing drive mechanism 20. Then, the webbing clip 22 moves from the first position to the second position, whereby the shoulder webbing 12A is switched from the first state to the second state.

  As a result, the shoulder P on the outer side in the vehicle width direction of the occupant P is supported from the side by the shoulder webbing 12A. ) The restraint of the occupant P on the vehicle seat 14 is started by the shoulder webbing 12A.

  This point will be described in comparison with a comparative example shown in FIGS. 4 (A) and 4 (B). As shown in FIGS. 4A and 4B, the seat belt apparatus 100 according to the comparative example is configured in the same manner as the seat belt apparatus 10 except that the webbing driving mechanism 20 is not provided. Therefore, in the seat belt device 100, in the case of a side collision shown in FIG. 4B, the upper body of the occupant is restrained by the shoulder webbing 12A in the first state as in FIG. 4A.

  Incidentally, in the case of a side collision, as shown in FIG. 4B, the side door SD is relatively displaced toward the vehicle interior side (see arrow A), and the occupant P It tries to move outward in the vehicle width direction relative to the vehicle seat 14. When the webbing 12 of the seat belt device 100 is attached, the occupant P is restrained by the vehicle seat 14 by the shoulder webbing 12A (see arrow C in FIG. 4B), and the vehicle width direction with respect to the vehicle seat 14 The relative displacement of is suppressed. In this case, the shoulder webbing 12A restrains the lower neck portion of the occupant P (restraint force mainly acts on the lower neck portion). That is, in the seat belt device 100, the occupant P is displaced relative to the vehicle seat 14 in the seat width direction until the upper end portion of the shoulder webbing 12A in the first state reaches from the upper portion of the shoulder portion S to the neck portion of the occupant P. After that, the restraint of the occupant P by the shoulder webbing 12A is started.

  On the other hand, in the seat belt device 10, the shoulder webbing 12A is switched to the second position at the time of a side collision, so that the second time without waiting for the relative displacement of the occupant P with respect to the vehicle seat 14 in the seat width direction. The occupant P can be restrained from the side of the shoulder S by the shoulder webbing 12A located at the position (see arrow C in FIG. 1). That is, the seat belt device 10 restrains the occupant P at an earlier timing than the seat belt device 100 by a time related to the consumption of the travel distance (stroke) L shown in FIG. Can do.

  As described above, since the restraint of the occupant P is started in a short time after the collision, the seat belt device 10 can reduce the peak load acting on the occupant P due to the restraint. Specifically, as shown in FIG. 3, in the seat belt device 10 according to the present embodiment, the restraint load rises in a short time from the occurrence of the collision as compared to the seat belt device 100 according to the comparative example (see arrow D). ), The peak of the restraining load is suppressed to a low level (see arrow E).

  As described above, in the seat belt device 10 according to the embodiment of the present invention, the shoulder webbing 12A for restraining the upper body of the occupant P is used to attach the occupant P to the vehicle seat 14 (

The vehicle body) can be effectively restrained in the vehicle width direction.

  In the above-described embodiment, the webbing driving mechanism 20 has the webbing clip 22 and the guide mechanism 24. However, the present invention is not limited to this and employs webbing support portions and guide means having various configurations. Can do. Further, the present invention is not limited to the configuration in which the webbing support portion such as the webbing clip 22 is disposed outside the seat back 18. For example, in the configuration in which the retractor is disposed in the seat back 18, the webbing clip You may comprise so that 22 may be moved within the seat back 18. FIG.

It is a front view which shows the side collision corresponding state of the seatbelt apparatus which concerns on embodiment of this invention. It is a front view which shows the normal state of the seatbelt apparatus which concerns on embodiment of this invention. It is a diagram which shows the time change of the passenger | crew restraint force at the time of the side collision by the seatbelt apparatus which concerns on embodiment of this invention. It is a figure which shows the seatbelt apparatus which concerns on the comparative example with embodiment of this invention, Comprising: (A) is a front view at the time of normal time, (B) is a front view at the time of a side collision.

Explanation of symbols

10. Seatbelt device (vehicle occupant restraint device)
12 Webbing 12A Shoulder Webbing (Webbing for upper body restraint)
14 Vehicle seat (seat)
18 Seat back 20 Webbing drive mechanism (mounting state switching mechanism)
22 Webbing clip (webbing support)

Claims (3)

A webbing for restraining the upper body for restraining the upper body of an occupant seated on the seat;
From the first state in which the webbing is mounted obliquely from above the shoulder of the occupant toward the vehicle lower side with respect to the upper body of the occupant, the webbing of the occupant's shoulder with respect to the upper body of the occupant A mounting state switching mechanism that can switch to a second state that is mounted obliquely from the side toward the vehicle lower side;
An occupant restraint device for vehicles.   The mounting state switching mechanism is configured such that a webbing support portion in which the upper end side of the webbing is locked or inserted is positioned on the upper end side of the seatback so that the width direction of the webbing at the support position substantially coincides with the seat width direction. By moving the webbing from the first position to a second position located on the sheet width direction end portion side of the seat back so that the width direction of the webbing in the support position substantially coincides with the sheet vertical direction, the webbing is moved to the first position. The vehicle occupant restraint device according to claim 1, configured to switch from a state to a second state.   The vehicle occupant restraint according to claim 1, wherein the wearing state switching mechanism is configured to switch the webbing from the first state to the second state when a side collision of the vehicle is detected or predicted. apparatus.

Images