JP5704059B2 - Vehicle occupant restraint system - Google Patents

Description

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

  A vehicle occupant comprising a movable body arranged so as to cross the front of the occupant and a first airbag deployed toward the abdomen of the occupant and a second airbag deployed forward and upward of the vehicle. A restraint device is known (see, for example, Patent Document 1).

JP 2009-166774 A

  By the way, in the configuration in which the first airbag is deployed from the movable body to the occupant side, a front-rear direction gap is set between the occupant's abdomen and the movable body. In the meantime, it is difficult to obtain the effect of suppressing the forward movement of the occupant by the first airbag, and there is room for improvement from the viewpoint of occupant restraint performance.

  An object of the present invention is to obtain a vehicle occupant restraint device that can improve the initial restraint performance at the time of a vehicle frontal collision while suppressing a feeling of pressure given to a seated occupant during normal times.

The vehicular occupant restraint device according to the first aspect of the present invention is stored in a retracted position along the side edge of the vehicle seat and while being separated from the front side of the vehicle with respect to the abdomen of the occupant seated on the vehicle seat. A movable body that can be used along the vehicle width direction, and is supported by the movable body so as to be relatively rotatable about an axis along the vehicle width direction with respect to the vehicle seat ; An airbag developed between the upper body of the seated occupant and a vehicle structure located in front of the seated occupant upon receiving gas supply; and a gas supply means for supplying gas to the airbag by operation; A lap belt for restraining the waist of the seated occupant, and so that the lap belt is detached from the movable body toward the waist of the seated occupant when the lap belt receives a tension of a predetermined value or more. The lap bell on the movable body A belt holding means for holding the belt, a belt retracting means for pulling the lap belt while applying a tension equal to or greater than the predetermined value to the lap belt by operation, and a frontal collision of the vehicle in a state where the movable body is located at the use position. And a control device that operates the gas supply means when detecting a frontal collision of a vehicle in a state where the movable body is located at a use position when the belt retracting means is detected. .

  In the vehicle occupant restraint device according to claim 1, the movable body at the use position is disposed in a space in front of the vehicle with respect to the abdomen of the occupant seated on the vehicle seat so as to cross the abdomen in the vehicle width direction when viewed from the front. The Since the movable body is separated from the abdomen of the seated occupant (not in contact), the movable body does not give a direct (physical) feeling of pressure to the seated occupant during normal times.

  When a frontal collision of the vehicle is predicted or detected, the control device activates the belt retracting means. Then, the lap belt is pulled in with a tension of a predetermined value or more, is detached from the movable body, and is attached to the occupant's waist. Further, when a frontal collision of the vehicle is detected, the control device operates the gas supply means. Then, the airbag is deployed between the vehicle structure positioned in front of the seated occupant and the upper body of the seated occupant. As a result, the seated occupant of the vehicle seat is restrained by the airbag in the forward movement of the upper body while the forward movement of the waist is restrained by the lap belt. Here, the lap belt can be put into the occupant in a short time from the collision detection or before the collision detection by being pulled in by the belt retracting means. For this reason, the initial restraint performance at the time of a vehicle frontal collision improves compared with the structure which restrains a seat passenger | crew's waist | hip | lumbar part with an airbag.

  Thus, in the vehicle occupant restraint device according to the first aspect, the initial restraint performance at the time of a vehicle frontal collision can be improved while suppressing the feeling of pressure given to the seated occupant during normal times.

  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 belt holding means faces the lap belt from the side of the seated occupant, and the seat occupant faces the movable body of the lap belt A holding member that restricts movement to the side and deforms due to a load applied to the seated occupant side received from the lap belt that is pulled in by the belt pull-in means, thereby allowing the lap belt to be detached.

  In the vehicle occupant restraint device according to the second aspect, since the holding member normally faces the lap belt from the seat occupant side, the movement of the lap belt to the seat occupant side is restricted. That is, the lap belt is held by the movable body. On the other hand, when the belt retracting means is operated and the lap belt is pulled while receiving a tension of a predetermined value or more, the lap belt tries to move to the seat occupant side and applies a load to the seat occupant side to the holding member. When the holding member is deformed by this load, the lap belt is detached from the movable body and attached to the waist of the seated occupant. With such a simple structure, belt holding means for holding the lap belt on the movable body in a detachable manner is configured (a belt holding function is realized).

  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 holding member is elastically deformed by a load applied to the seated occupant side received from the lap belt pulled in by the belt retracting means. A plurality of holding pieces that allow detachment of the lap belt are arranged so as to face the lap belt at a plurality of positions in the longitudinal direction with respect to the lap belt and at both ends in the width direction of the lap belt. .

  In the vehicle occupant restraint device according to claim 3, the lap belt is normally held by the movable body by the plurality of holding pieces facing the lap belt at a plurality of positions in the longitudinal direction and at both ends in the width direction. Yes. On the other hand, when the belt retracting means is operated and the lap belt is pulled while receiving a tension of a predetermined value or more, a load toward the seated occupant is applied to each holding piece from the lap belt. Each holding piece is elastically deformed by this load, whereby the lap belt is detached from the movable body and attached to the waist of the seated occupant. Each holding piece is restored to its initial position by its own elasticity after the lap belt is detached from the movable body. For this reason, compared with the structure provided with the holding member that has been deformed to the seated occupant side, the belt holding means after the collision is easy to process.

  A vehicle occupant restraint device according to a fourth aspect of the present invention is the vehicle occupant restraint device according to any one of the first to third aspects, wherein the belt retracting means applies a tension equal to or greater than the predetermined value to the lap belt. A first pretensioner that pulls in the lap belt; and a second pretensioner that pulls in the lap belt while applying a tension higher than that applied by the first pretensioner to the lap belt. Operates the first pretensioner when a frontal collision of the vehicle is predicted in a state where the movable body is located at the use position, and operates the second pretensioner when a frontal collision of the vehicle is detected.

  In the vehicle occupant restraint device according to the fourth aspect, when the frontal collision of the vehicle is predicted, the control device operates the first pretensioner. Then, the lap belt is pulled in with a tension of a predetermined value or more, is detached from the movable body, and is attached to the occupant's waist. When a frontal collision of the vehicle is detected, the control device operates the second pretensioner and the gas supply unit. As a result, the seated occupant of the vehicle seat is restrained by the airbag in the forward movement of the upper body while the forward movement of the waist is restrained by the lap belt. Here, the lap belt is attached to the occupant before the collision is detected, and the required occupant waist restraint performance is exhibited in a short time in the initial stage of the collision. Thereby, the initial restraint performance at the time of vehicle front collision improves further.

  A vehicle occupant restraint device according to a fifth aspect of the present invention is the vehicle occupant restraint device according to any one of the first to fourth aspects, wherein the movable body is in the vehicle width direction inside of the vehicle seat and the movable body is in the use position and the storage position A support portion that supports one end in the longitudinal direction of the movable body, and the other end portion in the longitudinal direction of the movable body that is located at the use position on the outer side in the vehicle width direction of the vehicle seat. A releasably coupled portion to be coupled, and one end side in the longitudinal direction provided at the other end of the lap belt supported on the inner side in the vehicle width direction of the vehicle seat, and the movable body coupled to the coupled portion And a coupling portion releasably coupled to the coupled portion provided in the coupled portion.

  In the vehicle occupant restraint device according to claim 5, the movable body is positioned on the retracted position side before the occupant gets on the vehicle or when the occupant gets off, and the movable body is in the use position when the occupant is seated on the vehicle seat. It is moved (including displacement and deformation) and connected to the connected part. As the movable body is coupled to the coupled portion, the coupling portion of the lap belt is coupled to the coupled portion, and the tension can be supported. In this way, the lap belt is also combined in one action for connecting the movable body to the connected portion, and the wearability is good. The belt retracting means is interposed between the lap belt and the vehicle seat or the vehicle body so that tension can be applied to the lap belt on the inner side, the outer side, or both sides of the vehicle seat in the vehicle width direction.

  A vehicle occupant restraint device according to a sixth aspect of the present invention is the vehicle occupant restraint device according to the fifth aspect, wherein the coupled portion is coupled to the coupling portion independently of a coupling structure of the coupled portion and the movable body. It is comprised, and it is hold | maintained at this to-be-connected part so that it can detach | leave from the said to-be-connected part to the said seated passenger | crew side with the tension | tensile_strength which acts on the said lap | belt belt maintaining the coupling | bonding part.

  In the vehicle occupant restraint device according to the sixth aspect, the movable body and the coupled portion are coupled by a coupling structure, and the lap belt and the coupled portion are coupled by a structure independent of the coupling structure. When the belt retracting means is actuated, the coupled portion to which the coupling portion on the lap belt side is coupled is detached from the coupled portion due to the tension of the lap belt and approaches the waist of the seated occupant. As described above, since the coupling portion between the lap belt and the coupled portion approaches the passenger side by the operation of the belt retracting means, there are few restrictions on the coupling position between the lap belt and the coupled portion.

  A vehicle occupant restraint device according to a seventh aspect of the present invention is the vehicle occupant restraint device according to the fifth aspect, wherein the lap belt is supported on the vehicle seat or the vehicle body via the belt retracting means on one end side in the longitudinal direction. The coupled portion to which the coupling portion is coupled is configured as an anchor, and the movable body is integrated with the coupling portion, and the coupled portion is coupled to the coupled portion. It is set as the structure connected with the said to-be-connected part.

  The vehicle occupant restraint device according to claim 7, wherein the connection between the movable body and the coupled portion and the coupling between the lap belt and the coupled portion include a portion (coupled portion) that functions as an anchor of the lap belt. Are connected (linked) by the structure. For this reason, the structure is simple.

  The vehicle occupant restraint device according to an eighth aspect of the present invention is the vehicle occupant restraint device according to any one of the fifth to seventh aspects, wherein the movable body has a curved shape with an intermediate portion protruding upward in the vehicle at the retracted position. In addition, it is rotatably supported with respect to the support portion, and is configured to move between the use position and the storage position while maintaining the curved shape by the rotation.

  In the vehicle occupant restraint device according to claim 8, since the intermediate portion of the movable body is previously curved, the movable body is simply rotated (without bending) with respect to the support portion. Can be moved between the storage position and the use position.

  As described above, the vehicle occupant restraint device according to the present invention has an excellent effect that the initial restraint performance at the time of a vehicle frontal collision can be improved while suppressing the feeling of pressure given to the seated occupant during normal times.

It is a top view which shows the use condition of the passenger | crew restraint apparatus for vehicles which concerns on the 1st Embodiment of this invention. It is a top view which shows the passenger | crew restraint state by the vehicle passenger | crew restraint apparatus which concerns on the 1st Embodiment of this invention. (A) is the side view seen from the vehicle inner side which shows the state which the lap bar which comprises the passenger | crew restraint apparatus for vehicles which concerns on the 1st Embodiment of this invention is located in a storing position, (B) is FIG. 3 (A). It is a side view which expands and shows typically the area | region 3B shown in FIG. It is the side view seen from the vehicle inside which shows the state where the lap bar which constitutes the crew member restraint device for vehicles concerning a 1st embodiment of the present invention is located in a use position. It is the side view seen from the vehicle inner side which abbreviate | omitted illustration of an inner bar etc. which show the state by which the front collision airbag was expand | deployed from the lap bar which comprises the passenger | crew restraint apparatus for vehicles which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the non-use state of the passenger | crew restraint apparatus for vehicles which concerns on the 1st Embodiment of this invention. It is the perspective view which abbreviate | omitted illustration of the passenger | crew which shows the use condition of the vehicle passenger | crew restraint apparatus which concerns on the 1st Embodiment of this invention. (A) is a side sectional view showing an enlarged frontal airbag device and a belt holding structure constituting the vehicle occupant restraint device according to the first embodiment of the present invention, and (B) shows a belt holding structure. It is a perspective view which expands and shows a part. It is a block diagram which shows the structure of the control system of the passenger | crew restraint apparatus for vehicles which concerns on the 1st Embodiment of this invention. It is a top view which shows the use condition of the passenger | crew restraint apparatus for vehicles which concerns on the 2nd Embodiment of this invention. It is a top view which shows the passenger | crew restraint state by the vehicle passenger | crew restraint apparatus which concerns on the 2nd Embodiment of this invention. It is the side view seen from the vehicle inner side which shows the state which the lap bar which comprises the passenger | crew restraint apparatus for vehicles which concerns on the 2nd Embodiment of this invention is located in a storage position. It is a perspective view which expands and shows the bar | burr connection structure and buckle mechanism which comprise the passenger | crew restraint apparatus for vehicles which concern on the 2nd Embodiment of this invention. (A) is the side view seen from the vehicle inside which shows the state which the lap bar which comprises the passenger | crew restraint apparatus for vehicles which concerns on the 3rd Embodiment of this invention is located in a storage position, (B) is FIG. 14 (A). It is the side view which expands and shows typically the area | region 14B shown in FIG. It is a block diagram which shows the structure of the control system of the passenger | crew restraint apparatus for vehicles which concerns on the 3rd Embodiment of this invention.

  A vehicle occupant restraint device 10 according to a first embodiment of the present invention will be described with reference to FIGS. In addition, arrow FR, arrow UP, and arrow OUT that are appropriately described in each figure respectively indicate the front direction, the upper direction, and the outer side in the vehicle width direction of the automobile to which the vehicle occupant restraint device 10 is applied. The forward direction, the upward direction, and the vehicle width direction of the automobile substantially coincide with the front direction, the upward direction, and the width direction of the vehicle seat 11 to which the vehicle occupant restraint device 10 is applied. Hereinafter, when the description is made simply using the front-rear direction and the up-down direction, the front-rear direction of the vehicle and the up-down direction of the vehicle are indicated unless otherwise specified.

  FIG. 1 is a plan view showing a vehicle interior to which the vehicle occupant restraint device 10 is applied. As shown in this figure, the vehicle seat 11 is provided so that an occupant is seated facing forward. The vehicle seat 11 includes a seat cushion 12 forming a seating portion, a seat back 14 having a lower end connected to a rear end portion of the seat cushion 12 to form a backrest, and a headrest 16 provided at an upper end of the seat back 14. And the main part. The vehicle seat 11 in this embodiment is a driver's seat, and is disposed on one side in the vehicle width direction with respect to the center console 18 disposed in the center of the vehicle body in the vehicle width direction. Needless to say, the vehicle occupant restraint device 10 can be applied to the vehicle seat 11 serving as the passenger seat.

(Configuration of support structure)
The vehicle occupant restraint device 10 includes a lap device 20 that supports a front-impact airbag device 34 and a lap belt 56, which will be described later, at positions where the seated occupant P can protect. The lap device 20 includes a lap bar 22 as a movable body that can take a use position indicated by a solid line in FIG. 1 and a storage position indicated by an imaginary line in FIG. FIG. 7 is a perspective view showing the use position of the lap bar 22 (use form of the lap device 20) (illustration of the seated occupant P is omitted), and FIG. 6 shows the storage position of the lap bar 22 (flight entry / exit form form of the lap device 20). It is a perspective view.

  As shown in these drawings, the lap bar 22 located at the use position is opposed to the abdomen while being separated in front of the abdomen of the seated occupant P (hereinafter simply referred to as “seat occupant P”) of the vehicle seat 11. It is supposed to be. On the other hand, the lap bar 22 located at the retracted position takes a posture of extending in the front-rear direction along the side edge in the vehicle width direction of the vehicle seat 11 (seat cushion 12), that is, the center console 18 in plan view. ing.

  As shown in FIGS. 6 and 7 and FIG. 3 which is a side view of the storage position, the inner end of the lap bar 22 in the vehicle width direction is the upper end of the inner bar 24 as a support portion supported by the rear portion of the seat cushion 12. It is connected to. The lap bar 22 and the inner bar 24 are rotatable relative to each other around a shaft 25 (see FIG. 3A) along the longitudinal direction at a connection portion substantially along a plane orthogonal to the longitudinal direction of the inner bar 24. . The lap bar 22 is configured to be switched between a storage position and a use position mainly by relative rotation around the shaft 25. That is, the storage position and the use position of the lap device 20 are switched by the movement (posture change) of the lap bar 22 with respect to the inner bar 24. The lap device 20 is configured to reach the vicinity of the use position by rotation around the shaft 25 with respect to the inner bar 24, and from that state to the use position through an operation of connecting a buckle mechanism 60 described later. The operation allowance for the operation of coupling the buckle mechanism 60 is set by the bending of the lap bar 22 itself, the play of the connecting portion between the lap bar 22 and the inner bar 24, or the like.

  The lap bar 22 has a curved shape in which an intermediate portion excluding both ends thereof protrudes upward at the storage position shown in FIG. 3 and protrudes upward at the use position shown in FIGS. 1 and 7. More specifically, the lap bar 22 is configured such that a substantially straight connecting portion 22B extends substantially rearwardly and downwardly from the longitudinal end of the intermediate portion 22A having an arcuate shape in plan view. . As a result, the lap bar 22 is formed in a shape that moves (changes in posture) from the storage position to the use position without being bent or stretched, mainly due to the relative rotation operation with the inner bar 24 described above. The end of the lap bar 22 opposite to the inner bar 24 side in the retracted position is configured to be located near the knee of the seated occupant P. The connection of the lap bar 22 to the outer bar 30 may be regarded as positioning the lap bar 22 to the use position, or may be regarded as holding (locking) the lap bar 22 at the use position.

Further, as shown in FIG. 3, the lower end of the inner bar 24 is supported so as to be relatively rotatable around an axis 26 along the vehicle width direction with respect to the rear portion of the seat cushion 12. As a result, the inner bar 24 is appropriately rotated around the shaft 26 when the lap device 20 (lap bar 22) is switched between the use position and the storage position. When the lap bar 22 is positioned at the retracted position, the inner bar 24 is configured to be positioned at the rotational position where the inner bar 24 has risen so as to be closer to the vertical than the use position, as shown in FIG. Although illustration is omitted, when the lap bar 22 is switched between the use position and the storage position, the steering wheel 48 is positioned out of the operating range of the lap bar 22 by the tilt function.

On the other hand, on the outer side in the vehicle width direction with respect to the seat cushion 12, an outer bar 30 as a connected portion to which the outer end in the vehicle width direction of the lap bar 22 is attached and detached is disposed. The outer bar 30 is supported by the seat cushion 12 so as to be rotatable around an unillustrated shaft 31 (see FIGS. 6 and 7) coaxial with the shaft 26 on the lower end side. Between the upper end portion of the outer bar 30 and the outer end of the lap bar 22 in the vehicle width direction, a bar connecting structure 32 is provided for releasably connecting them. The bar connection structure 32 in this embodiment also serves as a buckle mechanism 60 of the seat belt device 54 described later.

(Configuration of front-impact airbag)
As shown in FIG. 1, the lap bar 22 of the lap device 20 described above is provided with a front collision airbag device 34 for restraining (protecting) the seated occupant P against a frontal collision (front collision). The front-impact airbag device 34 is disposed along the longitudinal direction of the lap bar 22 at a portion (curved portion) located in front of the seated occupant P in the lap bar 22 in the use position.

  Specifically, as shown in FIG. 8A, the lap bar 22 has a hollow structure at least in the arrangement range of the front-impact airbag device 34, and an airbag accommodating portion 36 that is an internal space of the lap bar 22. A front-impact airbag device 34 is disposed inside. The front-impact airbag device 34 includes an inflator 38 as a gas supply means that generates gas by operation, and a front-impact airbag 40 as an airbag that is inflated and deployed by receiving gas supply from the inflator 38. It is configured as.

  The inflator 38 is fixed to the bottom wall 22 </ b> C facing the seated occupant P side of the lap bar 22 at the center in the width direction of the lap bar 22. The front-impact airbag 40 is fixed to the bottom wall 22C via the inflator 38 in a state where the inflator 38 is accommodated inside. The front-impact airbag 40 is roll-folded on both the front and rear sides with respect to the inflator 38 and is covered with a protective cloth (not shown) to maintain a folded state. When this protective cloth is subjected to bag inflation pressure, it is broken at a perforated cut (not shown) to allow the front airbag 40 to be deployed.

  An air bag door 44 that is broken and opened by the inflating and deploying pressure of the front airbag 40 is formed on the top wall 22D of the lap bar 22 facing the bottom wall 22C. The airbag door 44 according to this embodiment is opened at a corner with the side wall 22E by being cleaved at a groove-like tear line TL (see FIG. 8) formed on the top wall 22D, and the top wall 22D. An opening is formed at the top. Through this opening, as shown in FIG. 5 in which a part of the lap bar 22 and the inner bar 24 are not shown, the front and rear airbag 40 is inflated and deployed outside the lap bar 22.

  As shown in FIGS. 2 and 5, the front collision airbag 40 is configured to be deployed between the vehicle structure positioned in front of the seated occupant P and the upper body of the seated occupant P. In the example of FIG. 2 applied to the driver's seat, the front collision airbag 40 is deployed between the steering wheel 48 as a vehicle structure and the upper body of the seated occupant P. Note that the front-impact airbag 40 (reference numeral 40P) indicated by an imaginary line in FIG. 5 is an example of a deployment shape of a passenger seat airbag. In this example, an instrument panel 46 and a seated occupant P as a vehicle structure are used. The front-impact airbag 40 is deployed between the upper body and the upper body.

  Supplementing the fixing structure of the inflator 38 to the lap bar 22, a nut 52 is screwed into a stud bolt 50 fixed to the inflator 38 and penetrating the bottom wall 22C. Thereby, the inflator 38 is fastened and fixed to the bottom wall 22 </ b> C of the lap bar 22. In this embodiment, a belt holder 62, which will be described later, is fixed to the outer surface side of the bottom wall 22C by fastening with a stud bolt 50 and a nut 52.

(Configuration of seat belt device)
As shown in FIG. 2, the vehicle occupant restraint device 10 includes a seat belt device 54 for restraining the waist of the seated occupant P. The seat belt device 54 includes a lap belt 56 attached to the waist of the seated occupant P, a pretensioner device 58 that supports one end of the lap belt 56 in the longitudinal direction, and the other end of the lap belt 56 with respect to the outer bar 30. And a buckle mechanism 60 to be attached and detached. In the seat belt device 54 according to this embodiment, the lap belt 56 is normally held by the lap device 20 (lap bar 22) as shown in FIG. 4, and the lap belt 56 is shown in FIGS. It is set as the structure with which the seated crew member P is mounted | worn. This will be specifically described below.

  As shown in FIG. 8A, the lap belt 56 is held by the lap bar 22 via a belt holder 62 as belt holding means. As shown in FIG. 8B, the belt holder 62 includes a substrate portion 62A fixed to the bottom wall 22C of the lap bar 22, and a plurality of belt holders 62 spaced apart in the longitudinal direction of the substrate portion 62A on both sides in the width direction of the substrate portion 62A. And holding claws 62B. In this embodiment, the board portion 62A and each holding claw 62B are connected by a connecting wall 62C. As a result, the belt holder 62 is formed in a flat C shape in a cross-sectional view orthogonal to the longitudinal direction at the portion where the holding claw 62B is formed. The belt holder 62 is formed of a synthetic resin or the like, and each holding claw 62B can be elastically deformed (flexed) in a direction in which it is in contact with or separated from the substrate portion 62A.

  The belt holder 62 is fastened to the bottom wall 22C of the lap bar 22 by a stud bolt 50 and a nut 52 together with the inflator 38 described above. In this state, both ends of the lap belt 56 in the width direction are inserted between the substrate portion 62A and the holding claws 62B. Each holding claw 62B faces the lap belt 56 from the side opposite to the lap bar 22 side (seat occupant P side) and regulates the movement of the lap belt 56 to the seat occupant P side. Corresponds to a holding piece. Thereby, the movement of the lap belt 56 in the thickness direction with respect to the lap bar 22 is regulated by the belt holder 62 and is held by the lap bar 22 via the belt holder 62.

  Further, the holding claws 62B of the belt holder 62 are arranged on the side of the seat occupant P in the thickness direction received from the lap belt 56 when the lap belt 56 is pulled while receiving a tension of a predetermined value or more by the operation of a pretensioner device 58 described later. It bends by the load on. That is, each holding claw 62B of the belt holder 62 is elastically bent and deformed by the load from the lap belt 56 that is pulled in while receiving the tension, and allows the lap belt 56 to be detached from the belt holder 62, that is, the lap bar 22. It is configured. The belt holder 62 may be divided into a plurality of parts in the longitudinal direction.

  As shown in FIGS. 3A and 5, one end of the lap belt 56 is connected to a pretensioner device 58 disposed outside the vehicle seat 11 in the vehicle width direction (may be below the seat cushion 12) through the inner bar 24. It is connected so that it can be retracted. That is, the lap belt 56 is supported on the vehicle seat 11 via the pretensioner device 58.

  As shown in FIG. 3B, the pretensioner device 58 includes a winding shaft 58A, a frame 58B, and a gas generator 58C. The end of the lap belt 56 is wound around a winding shaft 58A that is rotatably supported by the frame 58B. The gas generator 58C attached to the frame 58B drives the winding shaft 58A in the winding direction by operation. The pretensioner device 58 is configured to perform a function of pulling the lap belt 56 with a tension (described later) of a predetermined value or more by the operation of the gas generator 58C.

In this embodiment, the frame 58 </ b> B of the pretensioner device 58 is fixed to the lower end side of the inner bar 24 and is supported rotatably around the shaft 26. In other words, the inner bar 24 is rotatably supported around the shaft 26 via the pretensioner device 58. FIG. 3B shows an example in which a retractor type pretensioner device 58 that directly winds the lap belt 56 is used. As the pretensioner device 58, a wire that is connected to the lap belt 56 is drawn. May be used. The wire pull-in type pretensioner device 58 may not be rotatable around the shaft 26 but may be fixed to the seat cushion 12.

  On the other hand, as shown in FIGS. 3A and 6, a tongue plate 60 </ b> A as a coupling portion constituting the buckle mechanism 60 is attached to the other end of the lap belt 56. The buckle mechanism 60 has a buckle portion 60B as a coupled portion to which the tongue plate 60A is attached and detached. The buckle portion 60B is integrated with the outer bar 30 constituting the lap device 20, and is configured to function as an anchor of the lap belt 56 by coupling the tongue plate 60A. In this embodiment, the buckle mechanism 60 also serves as a bar connection structure 32 between the lap device 20 and the outer bar 30. That is, the tongue plate 60A is fixed to the end portion in the vehicle width direction at the use position of the lap bar 22, and the buckle portion 60B is integrated (fixed) to the upper end portion of the outer bar 30.

(Configuration of occupant protection ECU)
As shown in the block diagram of FIG. 9, the vehicle occupant restraint device 10 includes an occupant protection ECU 66 as a control device. The occupant protection ECU 66 is electrically connected to each of the inflator 38 of the front collision airbag device 34 and the gas generator 58C of the pretensioner device 58. The occupant protection ECU 66 also detects a frontal collision detection sensor 64 that detects a frontal collision of an automobile to which the vehicle occupant restraint device 10 is applied, and a buckle sensor 68 that detects the coupling between the tongue plate 60A and the buckle part 60B of the buckle mechanism 60. Is electrically connected. The buckle sensor 68 can also be regarded as a sensor that detects the connection between the lap bar 22 and the outer bar 30 of the lap device 20 (attachment of the lap bar 22).

  When the collision detection signal is input from the front collision detection sensor 64 (when a collision is detected based on the signal from the front collision detection sensor 64), the occupant protection ECU 66 operates the pretensioner device 58 and the front collision airbag device 34. It is like that. That is, when a frontal collision is detected, the inflator 38 and the gas generator 58C are operated. Thus, as described later in the description of the operation of the present embodiment, the forward movement of the seated occupant P is restrained by the front airbag 40 and the lap belt 56.

Next, the operation of the first embodiment will be described.
In the vehicle occupant restraint device 10 configured as described above, the lap bar 22 is positioned at the retracted position when the occupant gets on and off. Since the storage position is on the inner side in the vehicle width direction with respect to the vehicle seat 11, the lap bar 22 does not hinder getting on and off, and the passenger gets on and off smoothly. A passenger who gets on and sits on the vehicle seat 11 moves the lap bar 22 in the retracted position around the shaft 25 to move the lap bar 22 to the vicinity of the use position. Next, the seat occupant P couples the tongue plate 60A to the buckle portion 60B, whereby the lap bar 22 reaches the use position. In this use position, each part of the lap device 20 including the front collision airbag device 34 and the lap bar 22 holding the lap belt 56 is positioned away from the abdomen of the seated occupant P forward (front side). In this case, the buckle coupling signal from the buckle sensor 68 is input to the occupant protection ECU 66, and the occupant protection ECU 66 recognizes that the lap bar 22 is located at the use position.

  From this state, when the collision detection signal is input from the front collision detection sensor 64, the occupant protection ECU 66 operates the inflator 38 and the gas generator 58C. Then, the lap belt 56 is pulled out with a tension of a predetermined value or more by the pretensioner device 58, and is detached from the belt holder 62, that is, the lap bar 22 while bending each holding claw 62B. Thereby, the lap belt 56 is attached to the waist of the seated occupant P, and restrains the forward movement of the waist of the seated occupant P.

  Further, the front-impact airbag 40 breaks the protective cloth with the inflation and deployment pressure, and tears the tear line TL to deploy the airbag door 44. As a result, the front airbag 40 is inflated outside the lap bar 22. The front airbag 40 is deployed between the steering wheel 48 (instrument panel 46) and the upper body of the seated occupant P while the reaction force is supported by the inflator 38 (lap device 20). As a result, the forward movement of the upper body of the seated occupant P is restrained by the deployed frontal airbag 40.

  Here, in the vehicle occupant restraint device 10, as described above, normally, the lap belt 56 for restraining the waist of the seated occupant P is not in contact with the abdomen of the seated occupant P, and the lap bar 22 of the lap device 20. Is held in. For this reason, the lap device 20 and the lap belt 56 do not give a direct (physical) pressure (restraint) feeling to the seated occupant P at the normal time.

  The vehicle occupant restraint device 10 is configured to restrain the lumbar portion of the seated occupant P with a lap belt 56 attached to the waist of the seated occupant P by the operation of the pretensioner device 58. For this reason, for example, compared with a comparative example in which the waist of the seated occupant P is restrained by an airbag that is deployed from the lap bar 22 toward the lumbar, it is possible to set the occupant in a short time after detecting a frontal collision. it can.

  Thus, in the vehicle occupant restraint device 10 according to the present embodiment, the initial restraint performance at the time of a frontal collision can be improved while suppressing the feeling of pressure given to the seated occupant P at the normal time.

  Further, since the front-impact airbag 40 is configured to be deployed from the lap bar 22 to the steering wheel 48 (instrument panel 46) and the occupant P, the reaction force is supported by the windshield glass. There is no need. For this reason, the capacity of the front-impact airbag 40 can be reduced. In particular, in the case of an automobile that employs a thin instrument panel that is flattened in the vertical direction, in the configuration in which a front-impact airbag is disposed on the instrument panel, the case of an automobile that employs a normal instrument panel; In comparison, the capacity of the airbag is increased.

  On the other hand, in the vehicle occupant restraint device 10, the front impact airbag 40 is not required to support the reaction force by the windshield glass as described above. Therefore, even in a configuration using a thin instrument panel, the front impact air The capacity of the bag 40 can be kept small. Also. Since both the moving direction of the seated occupant P and the deployment direction of the front impact airbag 40 at the time of the front impact are in front of the vehicle, the load on the seat occupant P by the front impact airbag 40 is small.

  Further, in the vehicle occupant restraint device 10, the lap belt 56 held by the holding claws 62 </ b> B of the belt holder 62 is seated on the holding claws 62 </ b> B by pulling the lap belt 56 with a tension of a predetermined value or more. It is detached from the lap bar 22 while being bent toward the passenger P side. With such a simple structure, belt holding means for holding the lap belt 56 on the lap bar 22 so as to be detachable is configured (a belt holding function is realized). Furthermore, since each holding claw 62B is restored by its own elasticity after the lap belt 56 is detached from the lap bar 22, the belt holder after the collision is compared with a configuration that allows the lap belt 56 to be detached by plastic deformation, for example. The process 62 is easy.

  Further, the lap belt 56 is held by the lap bar 22 that supports the front-impact airbag device 34 in front of the seated occupant P, and the tongue plate 60A on the lap belt 56 side and the buckle portion are connected with the operation of connecting the lap bar 22 to the outer bar 30. 60B is coupled. That is, the lap belt 56 is also joined by one action for connecting the lap bar 22 to the outer bar 30, and the wearability is good. In particular, since the buckle mechanism 60 has both a function of connecting the lap bar 22 to the outer bar 30 and a function of connecting the lap belt 56 to the outer bar 30 (anchor), the structure is simple.

  Furthermore, a lap bar 22 that is configured to form the lap device 20 and is curved so as to surround the occupant's abdomen from the front at the use position is also curved at the retracted position. For this reason, the lap device 20 moves the lap bar 22 between the use position and the storage position by rotating the lap bar 22 around the shaft 25 with respect to the inner bar 24 except for the fine operation for coupling and releasing the buckle mechanism 60. It can be switched and the wearability is good.

[Second Embodiment]
Next, a vehicle occupant restraint device 80 according to a second embodiment of the present invention will be described with reference to FIGS. In addition, about the structure fundamentally similar to the structure of the said 1st form, the code | symbol same as the structure of the said 1st form is attached | subjected, and the description and illustration may be abbreviate | omitted.

  FIG. 10 shows a plan view corresponding to FIG. 1, and FIG. 11 shows a plan view corresponding to FIG. As shown in these drawings, the vehicle occupant restraint device 80 includes a bar connection structure 82 and a buckle mechanism 84 in place of the bar connection structure 32 that the buckle mechanism 60 also functions. Is different.

  Specifically, as shown in FIG. 13, the bar connection structure 82 includes a tongue plate 82 </ b> A fixed to the lap bar 22 and a buckle portion 82 </ b> B provided on the outer bar 30 to which the tongue plate 82 </ b> A is attached and detached. Has been. On the other hand, the buckle mechanism 84 includes a tongue plate 84A as a coupling portion provided on the lap belt 56, and a buckle portion 84B and a buckle stay 84C as coupled portions to which the tongue plate 84A is attached and detached. Yes.

The buckle stay 84 </ b> C has an end opposite to the one end to which the buckle 84 </ b> B is fixed, supported together with the outer bar 30 so as to be rotatable around the shaft 31, and the support is an anchor of the lap belt 56. The buckle stay 84C has a long plate shape having flexibility, and in the coupled state of the buckle mechanism 84, the longitudinal direction and the thickness direction are substantially aligned with the longitudinal direction and the thickness direction of the lap belt 56. Has been. The buckle stay 84C is bent in the thickness direction by the tension of the lap belt 56 that is acted upon by the operation of the pretensioner device 58.

  The buckle stay 84 </ b> C is held by the outer bar 30 via a stay holder 86 having a structure similar to that of the belt holder 62. The stay holder 86 includes a base plate portion 86A fixed to the outer bar 30, a plurality of holding claws 86B spaced apart in the longitudinal direction of the base plate portion 86A on both sides in the width direction of the base plate portion 86A, the holding claws 86B and the base plate portion 86A. And a connecting wall 86C for connecting the two. Thereby, the stay holder 86 is formed in a flat C shape in a cross-sectional view orthogonal to the longitudinal direction at a portion where the holding claw 86B is formed. The stay holder 86 is formed of a synthetic resin or the like, and each holding claw 86B can be elastically deformed (flexed) in a direction in which it is in contact with or separated from the substrate portion 86A.

  The buckle stay 84C has both end sides in the width direction inserted between the substrate portion 86A and the holding claws 86B. That is, each holding claw 86B is opposed to the buckle stay 84C from the side opposite to the outer bar 30 side, and holds the buckle stay 84C in the vehicle width direction inner side (seat occupant P side). Can be caught. Accordingly, the buckle stay 84 </ b> C is configured such that movement in the thickness direction with respect to the outer bar 30 is restricted by the stay holder 86 and is held by the lap bar 22 via the stay holder 86.

  Further, each holding claw 86B of the stay holder 86 receives a thickness from the buckle stay 84C that bends inward in the vehicle width direction as described above when the lap belt 56 is pulled while receiving a tension of a predetermined value or more by the operation of the pretensioner device 58. It is bent by the load in the direction. Accordingly, the buckle stay 84C is configured to be allowed to be detached from the stay holder 86, that is, the outer bar 30, to the seated occupant P side when a tension of a predetermined value or more is applied to the lap belt 56. The stay holder 86 may be divided into a plurality of parts in the longitudinal direction.

  The belt holder 62 and the stay holder 86 are set to play with the lap belt 56 and the buckle stay 84C so that the rattling of the tongue plate 84A and the buckle portion 84B is within an allowable range. This allowable range is a range in which the tongue plate 84A is coupled (induced) to the buckle portion 84B in accordance with the operation of coupling the tongue plate 82A to the buckle portion 82B.

  As described above, in the vehicle occupant restraint device 80, the buckle stay 84 </ b> C coupled to the lap belt 56 by the coupling at the buckle mechanism 84 is configured to be close to the seated occupant P together with the lap belt 56. For this reason, the buckle mechanism 84 can be arrange | positioned ahead compared with the case where the buckle mechanism 60 which functions as an anchor of the lap belt 56 is used.

  In this embodiment, as shown in FIG. 10 and FIG. 11, the connection end of the lap bar 22 is positioned at the front upper side than the outer bar 30 in the first embodiment, that is, the outer bar that is longer than the first embodiment. 30 is used. Further, as shown in FIG. 12, in the present embodiment, the connecting end of the lap bar 22 is positioned at the front upper side than the inner bar 24 in the first embodiment, that is, the inner bar 24 that is longer than that in the first embodiment. It is set as the structure using. Accordingly, the lap bar 22 constituting the vehicle occupant restraint device 80 has a configuration in which substantially straight connection portions 22B at both ends are shorter than those in the first embodiment.

  Other configurations of the vehicle occupant restraint device 80 are configured in the same manner as the corresponding configurations of the vehicle occupant restraint device 10, including portions not shown. Hereinafter, the operation of the vehicle occupant restraint device 80 according to the second embodiment will be described mainly with respect to the difference from the operation of the vehicle occupant restraint device 10 according to the first embodiment.

  In the vehicle occupant restraint device 80 configured as described above, an occupant seated on the vehicle seat 11 rotates the lap bar 22 in the retracted position around the shaft 25 to move the lap bar 22 to the vicinity of the use position. Next, the seated occupant P couples the tongue plate 82A to the buckle portion 82B. Thereby, the lap bar 22 is connected to the outer bar 30, and the tongue plate 84A is coupled to the buckle portion 84B in accordance with the operation.

  When the collision detection signal is input from the front collision detection sensor 64, the occupant protection ECU 66 operates the gas generator 58C of the pretensioner device 58. Then, the lap belt 56 is pulled by the pretensioner device 58 with a tension equal to or higher than a predetermined value, and is detached from the belt holder 62, that is, the lap bar 22 while bending each holding claw 62 </ b> B, and is attached to the waist of the seated occupant P. The Similarly, the buckle stay 84C is detached from the stay holder 86, that is, the outer bar 30, while bending each holding claw 86B, and is moved (mounted or approached) to the waist side of the seated occupant P. Subsequent functions and effects are the same as the corresponding functions and effects of the vehicle occupant restraint device 10 according to the first exemplary embodiment.

  Here, in the vehicle occupant restraint device 80, the buckle stay 84C can be detached from the outer bar 30 in the coupled state of the tongue plate 84A and the buckle portion 84B, so the anchor of the lap belt 56 is compared with the buckle mechanism 60. Can be set backward. For this reason, in the vehicle occupant restraint device 80, the outer bar 30 and the inner bar 24 can be lengthened in comparison with the vehicle occupant restraint device 10, which contributes to the downsizing of the lap bar 22 that is a movable body. Thereby, the switching operation | movement between the storing position of the lap bar 22 by the seated passenger | crew P and a use position becomes easy. In other words, the interference of the lap bar 22 with the seated occupant P is prevented or effectively suppressed.

[Third Embodiment]
Next, a vehicle occupant restraint device 90 according to a third embodiment of the present invention will be described with reference to FIGS. 14 and 15. In addition, about the structure fundamentally similar to the structure of the said 1st or 2nd form, the code | symbol same as the structure of the said 1st or 2nd form is attached | subjected, and the description and illustration may be abbreviate | omitted. is there.

  FIG. 14A shows a vehicle occupant restraint device 90 in a side view corresponding to FIG. 3A, and FIG. 14B shows a region 14B shown in FIG. The side view which expands and shows the structure of is shown. As shown in these drawings, the vehicle occupant restraint device 90 is different from the first and second embodiments in that it includes a pretensioner device 92 instead of the pretensioner device 58. The pretensioner device 92 includes an electric motor 92D in addition to the winding shaft 92A, the frame 92B, and the gas generator 92C configured in the same manner as the winding shaft 58A, the frame 58B, and the gas generator 58C. The electric motor 92D attached to the frame 92B is configured to drive the winding shaft 92A in the winding direction by operation.

  Therefore, the pretensioner device 92 is configured to perform a first pretensioner function that pulls the lap belt 56 by the operation of the electric motor 92D and a second pretensioner function that pulls the lap belt 56 by the operation of the gas generator 92C. . The pretensioner device 92 is configured to draw the lap belt 56 with a tension (described later) equal to or higher than a predetermined value in the first pretensioner function. Further, the pretensioner device 92 is configured to draw the lap belt 56 with a tension exceeding the tension in the first pretensioner function in the second pretensioner function. That is, the pretensioner device 92 corresponds to the first pretensioner and the second pretensioner in the present invention. The configuration of the pretensioner device 92 can be diverted from the technology of a motor retractor including a belt slack removal function by a motor and a gas pretensioner, for example, and the detailed description thereof is omitted.

  As shown in FIG. 15, an occupant protection ECU 94 provided in place of the occupant protection ECU 66 is electrically connected to an electric motor 92D in addition to the inflator 38 and the gas generator 92C of the pretensioner device 92. In addition to the front collision detection sensor 64 and the buckle sensor 68, the occupant protection ECU 94 is electrically connected to a front collision prediction sensor 96 that predicts a frontal collision of an automobile to which the vehicle occupant restraint device 90 is applied. . When the collision prediction signal is input from the front collision prediction sensor 96 (when a collision is predicted based on the signal from the front collision prediction sensor 96), the occupant protection ECU 94 performs the first pretensioner function of the pretensioner device 92, that is, the electric motor. 92D is actuated. Thus, the vehicle occupant restraint device 10 is configured such that the lap belt 56 is detached from the lap bar 22 and attached to the waist of the seated occupant P without slack before a frontal collision occurs.

  When the collision detection signal is input from the front collision detection sensor 64 (when a collision is detected based on the signal from the front collision detection sensor 64), the occupant protection ECU 94 performs the second pretensioner function and the front of the pretensioner device 92. The crash airbag device 34 is actuated. That is, when a frontal collision is detected, the inflator 38 and the gas generator 92C are operated. Accordingly, the forward movement of the seated occupant P is restrained by the front collision airbag 40 and the lap belt 56.

  Other configurations of the vehicle occupant restraint device 90 are the same as the corresponding configurations of the vehicle occupant restraint device 10 or the vehicle occupant restraint device 80, including portions not shown. Hereinafter, the operation of the vehicle occupant restraint device 90 according to the third embodiment will be described mainly with respect to the difference from the operation of the vehicle occupant restraint device 10 according to the first and second embodiments.

  The occupant protection ECU 94 operates the electric motor 92D of the pretensioner device 92 when a collision prediction signal is input from the front collision prediction sensor 96 from a state where the lap bar 22 is located at the use position. Then, the lap belt 56 is pulled by the pretensioner device 92 with a tension equal to or greater than a predetermined value, so that the holding claws 62B are bent while being detached from the belt holder 62, that is, the lap bar 22, and the waist of the seated occupant P is slackened. Mounted in a removed state. When the collision detection signal is input from the front collision detection sensor 64, the occupant protection ECU 94 operates the inflator 38 and the gas generator 92C. Then, the lap belt 56 is further pulled in by the pretensioner device 58 and restrains the waist portion (forward movement thereof) of the seated occupant P. Further, the front-impact airbag 40 breaks the protective cloth with the inflation and deployment pressure, and tears the tear line TL to deploy the airbag door 44.

  As described above, since the pretensioner device 92 has the first and second pretensioner functions, the lap belt 56 is attached to the seated occupant P based on the collision prediction signal from the front collision prediction sensor 96 before the front collision is detected. Can be worn on the waist. Therefore, the vehicle occupant restraint device 90 further improves the initial restraint performance at the time of a vehicle frontal collision. The following functions and effects are the same as the corresponding functions and effects of the vehicle occupant restraint devices 10 and 80 according to the first and second embodiments.

  In each of the above-described embodiments, an example in which the lap bar 22 is positioned along the center console 18 at the storage position is shown, but the present invention is not limited to this. The storage position of the lap bar 22 may be a position that does not hinder the passenger P from getting on and off, such as a position standing along the side edge of the seat back 14.

  Further, in each of the above-described embodiments, the example in which the pretensioner devices 58 and 92 are provided at the inner end in the vehicle width direction that is one end side of the lap belt 56 is shown, but the present invention is not limited to this. For example, the pretensioner device 58 or the like may be disposed at both ends of the lap belt 56, or may be provided only at the outer end in the vehicle width direction of the lap belt 56. In 3rd Embodiment, you may comprise so that the 1st, 2nd pretensioner function may be shared with the pretensioner apparatus arrange | positioned at the both ends of the lap belt 56. FIG.

  Furthermore, in the above-described embodiment, an example in which the vehicle occupant restraint device 10, 80, 90 is applied to a driver seat or a passenger seat is shown, but the present invention is not limited to this. For example, the vehicle occupant restraint devices 10, 80, 90 may be applied to the second and subsequent seats of a vehicle having a plurality of rows of seats.

  Further, in each of the above-described embodiments, the example in which the belt holder 62 holds the lap belt 56 on the lap bar 22 in a detachable manner has been described, but the present invention is not limited to this. The belt holding means is sufficient if it can hold the lap belt 56 to the lap bar 22 so as to be detachable, and other configurations such as a magnet and a planar fastener can be adopted. In addition, by employing a magnet, a planar fastener, or the like, the lap belt 56 can be held again by the lap bar 22 in a case where the collision does not occur after the collision prediction.

DESCRIPTION OF SYMBOLS 10 Vehicle occupant restraint apparatus 11 Vehicle seat 20 Lap device 22 Lap bar (movable body)
24 inner bar (support)
30 Outer bar (connected part)
32 bar connection structure (connection structure)
38 Inflator (gas supply means)
40 Front airbag (airbag)
46 instrument panel 56 lap belt 58 pretensioner device (belt retracting means)
60 Buckle mechanism (anchor)
60A tongue plate (joint)
60B Buckle part (joined part)
62 Belt holder (belt holding means, holding member)
62B Holding claw (holding piece)
66 Passenger Protection ECU (Control Device)
80/90 Vehicle occupant restraint system 82 Bar connection structure (connection structure)
84 Buckle mechanism 84A tongue plate (joint)
84C buckle stay (bonded part)
84B Buckle (joined part)
86 Stay holder (connected part)
92 Pretensioner device (belt retracting means)
92C gas generator (second pretensioner)
92D electric motor (first pretensioner)
94 Crew protection ECU (control device)

Claims (8)

A storage position stored along the side edge portion of the vehicle seat and a use position arranged along the vehicle width direction while being separated from the front side of the vehicle with respect to the abdomen of the occupant seated on the vehicle seat can be taken. And a movable body supported so as to be relatively rotatable about an axis along the vehicle width direction with respect to the vehicle seat ;
An airbag that is provided on the movable body and that is deployed between an upper body of the seated occupant and a vehicle structure positioned in front of the seated occupant upon receiving gas supply;
A gas supply means for supplying gas to the airbag by operation;
A lap belt for restraining the waist of the seated occupant;
Belt holding means for holding the lap belt on the movable body so that the lap belt is detached from the movable body to the waist side of the seated occupant when the lap belt receives a tension of a predetermined value or more;
Belt pulling means for pulling in the lap belt while applying tension equal to or higher than the predetermined value to the lap belt by operation;
When the frontal collision of the vehicle is detected or predicted when the movable body is located at the use position, the belt retracting means is operated, and when the frontal collision of the vehicle is detected while the movable body is located at the use position. A control device for operating the gas supply means;
An occupant restraint device for vehicles.   The belt holding means is opposed to the lap belt from the seated occupant side, restricts movement of the lap belt to the seated occupant side relative to the movable body, and receives the lap belt from the lap belt drawn by the belt retracting means. The vehicle occupant restraint device according to claim 1, further comprising a holding member that allows the lap belt to be detached by being deformed by a load applied to the seated occupant.   The holding member includes a plurality of holding pieces that are elastically deformed by a load applied to the seated occupant side that is received from the lap belt that is pulled in by the belt retracting means, and a plurality of holding pieces that allow detachment of the lap belt are longitudinal directions with respect to the lap belt. The vehicle occupant restraint device according to claim 2, wherein the vehicle occupant restraint device is arranged so as to be opposed to the lap belt at both ends of the lap belt in the width direction. The belt pull-in means applies a first pretensioner that pulls the lap belt while applying a tension equal to or higher than the predetermined value to the lap belt, and a tension that is higher than that applied by the first pretensioner to the lap belt. A second pretensioner that pulls in the lap belt,
The control device operates the first pretensioner when a frontal collision of the vehicle is predicted in a state where the movable body is in the use position, and operates the second pretensioner when a frontal collision of the vehicle is detected. The vehicle occupant restraint device according to any one of claims 1 to 3. A support portion that supports one end in the longitudinal direction of the movable body so that the movable body can move between the use position and the storage position on the inner side in the vehicle width direction of the vehicle seat;
A connected portion to which the other end in the longitudinal direction of the movable body located at the use position is releasably connected on the outer side in the vehicle width direction of the vehicle seat;
One end side in the longitudinal direction is provided at the other end of the lap belt supported on the inner side in the vehicle width direction of the vehicle seat, and the movable body is connected to the connected portion along with the operation to be connected to the connected portion. A coupling portion releasably coupled to the provided coupled portion;
The vehicle occupant restraint device according to any one of claims 1 to 4, further comprising:   The coupled portion is configured to be coupled to the coupled portion independently of the coupling structure of the coupled portion and the movable body, and is coupled to the coupled portion by a tension acting on the lap belt. The vehicle occupant restraint device according to claim 5, wherein the occupant restraint device for a vehicle is held by the coupled portion so as to be detachable from the coupled portion to the seated occupant side while maintaining a coupled state. The lap belt is supported by the vehicle seat or the vehicle body via the belt retracting means on one end side in the longitudinal direction, and the coupled portion to which the coupling portion is coupled is an anchor. ,
6. The vehicle according to claim 5, wherein the movable body is configured such that the coupling portion is integrated, and the coupling portion is coupled to the coupled portion by coupling the coupling portion to the coupled portion. Crew restraint device.   The movable body has a curved shape in which the middle portion is convex upward in the vehicle at the retracted position, and is supported rotatably with respect to the support portion, and remains in the curved shape as a result of the rotation. The vehicle occupant restraint device according to any one of claims 5 to 7, wherein the vehicle occupant restraint device is configured to move between the vehicle and the storage position.