JP2007196881A - Seat belt device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce slack between a shoulder webbing and an occupant at the time of an operation, and to improve occupant restraining performance of the shoulder webbing. <P>SOLUTION: In this seat belt device 10, a buckle driving device 38 moves a buckle device 32 to a seat 16 side (the vehicle width direction inside) when the occupant 18 wears the webbing 20. An end part on an occupant waist side of the shoulder webbing 20B therefore is moved to the vehicle width direction inside, and slack between the shoulder webbing 20B and the occupant 18 is reduced. The shoulder webbing 20B is moved as a whole to an upper side of a vehicle, and thereby occupant restraining performance of the shoulder webbing 20B can be improved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a seat belt device for restraining an occupant by a seat belt webbing, and more particularly to a vehicle seat belt device for tightly attaching a webbing to an occupant in a vehicle emergency.

  There has been proposed a seat belt device that pulls in a buckle and tightly attaches a webbing to an occupant at the time of a vehicle collision (see, for example, Patent Document 1).

  In this seat belt device, a tongue plate attached to a connection point between a lap webbing and a shoulder webbing is engaged with a buckle, and the buckle is pulled downward in a vehicle collision. Thereby, the clearance gap (slack) between webbing and a passenger | crew decreases, and a passenger | crew's restraint property improves.

By the way, in this seat belt device, the shoulder webbing moves downward as the buckle is retracted. However, in order to improve the occupant restraint performance of the shoulder webbing, it is more efficient to restrain the part of the occupant chest that is far from the occupant waist, which is the center of rotation of the occupant's upper body in the occupant chest It is.
JP-A-7-315162

  In consideration of the above-described facts, the present invention can provide a vehicle seat belt device that can reduce a gap (slack) between a shoulder webbing and an occupant during operation and can improve the occupant restraint of the shoulder webbing. Is the purpose.

  According to a first aspect of the present invention, there is provided a vehicular seatbelt device comprising: a locking member that locks a waist side of a shoulder webbing to a vehicle; And a moving means that moves away from a side with respect to a seat on which the person sits.

  It should be noted that “after being worn” according to claim 1 is “immediately upon detection of the occupant's webbing” or “when a time set in a timer or the like has elapsed after detecting the occupant's webbing”. "After detecting occupant's webbing and driving condition of vehicle", "After detecting occupant's webbing condition, emergency state of vehicle (collision state, collision prediction state, vehicle sudden deceleration state) Etc.) ”and“ others ”are included.

  In the first aspect of the invention, the moving means separates the locking member of the shoulder webbing laterally with respect to the seat on which the occupant is seated. For this reason, the end of the shoulder webbing on the passenger waist side is moved to the side of the seat, and slack between the shoulder webbing and the passenger is reduced. In addition, since the shoulder webbing is entirely moved upward of the vehicle, the occupant restraint of the shoulder webbing can be improved.

  The vehicle seat belt device according to claim 2 is the vehicle seat belt device according to claim 1, wherein the locking member includes a tongue plate on which the shoulder webbing is locked, and the tongue plate. And when the detecting means for detecting that the tongue plate is engaged with the buckle detects the engagement, the moving means moves the buckle laterally with respect to the seat. It is characterized by separation.

  In the invention according to claim 2, since the moving means separates the buckle laterally with respect to the seat after the detecting means detects that the tongue plate is engaged with the buckle, in a state where the occupant wears the shoulder webbing, The shoulder webbing is always tightly attached to the occupant. Therefore, even if there is no means for predicting a vehicle collision or the like, the occupant can be restrained well in a vehicle collision prediction state or the like.

  A vehicle seat belt device according to a third aspect of the present invention is the vehicle seat belt device according to the second aspect, wherein the moving means has an actuator for moving the buckle toward and away from the seat sideways. It is characterized by that.

  In the invention according to claim 3, since the buckle can be moved toward and away from the seat by the actuator, the buckle can be brought close to the seat after the engagement between the tongue plate and the buckle is released, for example. . Thereby, when the occupant engages the tongue plate with the buckle, that is, when the occupant wears the shoulder webbing, operability can be improved.

  According to a fourth aspect of the present invention, there is provided a vehicle seat belt apparatus according to the first aspect, further comprising a collision prediction means for predicting a collision of the vehicle, wherein the vehicle collision prediction means can predict a vehicle collision. When detected, the moving means separates the locking member laterally with respect to the seat.

  In the invention according to claim 4, when the collision prediction means detects the vehicle collision prediction, the movement means separates the locking member to the side with respect to the seat, so that the vehicle collision is predicted. The shoulder webbing is tightly attached to the occupant only. Therefore, in a normal traveling state, the shoulder webbing can be loosely attached to the occupant, and the comfort of the occupant can be ensured.

  The vehicle seat belt device according to claim 5 is the vehicle seat belt device according to claim 4, wherein the moving means includes an inflator that moves the locking member away from the seat sideways. It is characterized by having.

  In the invention according to claim 5, when the collision prediction means detects the vehicle collision prediction, the inflator quickly separates the locking member to the side with respect to the seat, so that when the vehicle collision is predicted, the shoulder webbing The occupant restraint can be improved quickly.

  A vehicle seat belt device according to a sixth aspect of the present invention is the vehicle seat belt device according to any one of the first to fifth aspects, further comprising a retractor for winding the shoulder webbing, The retractor has a pretensioner mechanism for forcibly winding the shoulder webbing around the retractor, and the pretensioner mechanism is operated after the moving means separates the locking member laterally with respect to the seat. It is characterized by that.

  In the sixth aspect of the present invention, after the locking member is moved laterally with respect to the seat by the moving means, that is, after the shoulder webbing is moved upward of the vehicle, the pretensioner mechanism is operated and the shoulder webbing is performed. It is forcibly taken up by the retractor. Therefore, for example, when a vehicle collision is predicted, the shoulder webbing can be more tightly attached to the occupant by the pretensioner mechanism while maintaining the appropriate mounting position of the shoulder webbing on the occupant upper body.

  A vehicle seat belt device according to a seventh aspect of the present invention is the vehicle seat belt device according to any one of the first to sixth aspects, wherein the buckle is attached to the tip of the stay, The base end portion of the stay is moved by the moving means.

  In the invention according to claim 7, the moving means can move the shoulder webbing via the buckle by moving the stay.

  As described above, in the vehicle seat belt device according to the present invention, the slack between the shoulder webbing and the occupant can be reduced by moving the locking member to the side of the seat, and the shoulder webbing is moved upward of the vehicle. Thereby, the occupant restraint of the shoulder webbing can be improved.

<First Embodiment>
1 to 5 show a vehicle seat belt device 10 to which a first embodiment of the present invention is applied.

  The seat belt device 10 is provided with a seat belt webbing 20 to be attached to an occupant 18 seated on a seat 16 (a driver seat in the first embodiment) as a seat having a seat cushion 12 and a seat back 14. . One end of the webbing 20 is locked to an anchor plate 24 attached to the lower part of the vehicle side wall 22, and the other end is wound up on a retractor 26 accommodated in the lower part of the vehicle side wall 22. The retractor 26 winds up the webbing 20 with an urging force, and has an emergency withdrawal stop mechanism (ELR) that stops the withdrawal of the webbing 20 with an inertial force in a vehicle emergency. Further, the retractor 26 is provided with a pretensioner mechanism that forcibly winds the webbing 20 around the retractor 26. This pretensioner mechanism is configured such that its operation is controlled by a control device 52 described later.

  The intermediate portion of the webbing 20 passes through the tongue plate 28 and the shoulder anchor 30, and the shoulder anchor 30 is attached to the upper portion of the vehicle side wall 22. The tongue plate 28 can be engaged with a buckle device 32 disposed substantially in the center of the vehicle. For this reason, when the tongue plate 28 is engaged with the buckle device 32 after the occupant 18 is seated on the seat 16, the lap webbing 20A is formed between the anchor plate 24 and the tongue plate 28 of the webbing 20, and the tongue plate 28 and the shoulder anchor 28 are engaged. Between 30 and 30, the shoulder webbing 20B is attached to the occupant's waist and upper body.

  The seat cushion 12 of the seat 16 is mounted on the vehicle floor 36, and the seat cushion 12 is provided with a buckle driving device 38 as an actuator constituting a moving means. As shown in FIGS. 1 to 3, the buckle driving device 38 has a guide base 40. The guide base 40 has a longitudinal direction in the vehicle width direction, and its longitudinal cross-sectional shape is a frame shape and is fixed to the seat cushion 12.

  A slide block 42 is inserted into the guide base 40 so as to be movable in the vehicle width direction. A base end portion 44 </ b> A of the stay 44 is fixed to the inner end portion of the slide block 42 in the vehicle width direction. A buckle device 32 is fixed to the tip 44B of the stay 44. A rack 47 is formed on the upper surface of the slide block 42 and meshes with the pinion 48. The pinion 48 has a central shaft 48 </ b> A disposed in the longitudinal direction of the vehicle, and the axial end of the central shaft 48 </ b> A is connected to the output shaft 50 </ b> A of the motor 50. The motor 50 is attached to the guide base 40, and is driven to reciprocate by the output signal of the control device 52 constituting the moving means.

  The buckle device 32 is provided with a release button 32A. When the occupant presses the release button 32A, the engagement of the tongue plate 28 is released, and the occupant 18 can release the mounting of the webbing 20. ing. Further, the buckle device 32 is provided with a tongue plate detection sensor 28A as a detecting means so that the state where the tongue plate 28 is engaged with the buckle device 32 can be detected. The sensor 28A is electrically connected to the control device 52. The control device 52 detects the state in which the tongue plate 28 is engaged with the buckle device 32, drives the motor 50, and moves the slide block 42 to the guide base. The buckle device 32 is pushed out from 40 and moved laterally with respect to the seat 16 (in the first embodiment, in the vehicle width direction, in the solid line state in FIG. 4). When the sensor 28A detects the disengagement of the tongue plate 28, the control device 52 reverses the motor 50 and pulls the slide block 42 into the guide base 40, which is indicated by the imaginary line in FIG. In this way, the buckle device 32 is moved outward in the vehicle width direction in a direction to approach the seat 16.

  As shown in FIGS. 1 to 3, the guide base 40 is provided with a stopper 54 whose tip is chevron, and is moved up and down by the driving force of the solenoid 55. The solenoid 55 is controlled by the control device 52, and the stopper 54 is lowered when the slide block 42 is pushed out from the guide base 40 (FIG. 3) and pulled into the guide base 40 (FIG. 2). The slide block 42 can be fixed so as not to move by engaging with the groove 47.

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

  When the occupant 18 is not seated on the seat 16, the buckle device 32 is in the imaginary line position of FIG. When the tongue plate 28 is engaged with the buckle device 32 after the occupant 18 is seated on the seat 16, the lap webbing 20A is mounted on the waist of the occupant 18 and the shoulder webbing 20B is mounted on the upper body of the occupant 18. The webbing is put on. In this state, the sensor 28 </ b> A that detects the engagement of the tongue plate 28 with the buckle device 32 sends the detection signal to the control device 52. The control device 52 drives the solenoid 55 of the buckle drive device 38 to remove the stopper 54 from the rack 47 and drives the motor 50 to rotate the pinion 48. As a result, the rack 47 acts in the direction in which the slide block 42 is pushed out from the guide base 40, and the stay 44 attached to the tip of the guide base 40 moves toward the inside of the vehicle in the direction away from the seat 16, that is, the occupant 18. (See the solid line state in FIG. 4). Thereafter, the control device 52 drives the solenoid 55 to engage the tip chevron of the stopper 54 with the rack 47 and fix the movement of the slide block 42.

  For this reason, the vehicle inner side ends of the lap webbing 20A and the shoulder webbing 20B are moved inward in the vehicle width direction. As a result, the lap webbing 20A and the shoulder webbing 20B are tightly attached to the waist and upper body of the occupant 18, and the gap (slack) between the occupant 18 and the webbing 20 is reduced. As a result, a so-called pretensioner effect is obtained, and the restraint of the occupant is improved.

  Moreover, since the inner end of the shoulder webbing 20B in the vehicle width direction moves together with the buckle device 32 toward the side of the seat 16 on the inner side in the vehicle width, the shoulder webbing 20B is positioned before the operation of the buckle driving device 38 (see FIG. 4 (imaginary line position) as a whole, the vehicle moves upward (solid line position in FIG. 4). Therefore, the center of action Q1 of the restraining force (see arrow F in FIG. 5) of the shoulder webbing 20B on the occupant 18 upper body (chest) is also higher than the center of action Q2 of the restraining force before the buckle driving device 38 is actuated. Move to.

  That is, the distance L1 from the occupant 18 waist portion O to the action center point Q1, which is the rotation center of the forward tilt behavior of the occupant 18 upper body (see point O in FIGS. 4 and 5), is the occupant 18 before the buckle drive device 38 operates. Since it is longer than the distance L2 from the waist O to the action center point Q2, it is possible to efficiently suppress the forward leaning behavior of the upper body of the occupant 18 with a small load (restraint force). The restraint property of 18 can be improved.

  In addition, the stiffness of the bone in the human chest decreases as it goes from the upper part (first rib, clavicle) to the lower part (lower rib, rib cartilage), and in particular, the rib cartilage (the pigeon tail) is much lower. In the seatbelt device 10 according to the first embodiment, the shoulder webbing 20B restrains the upper part of the occupant chest, so that the upper body of the occupant 18 can be restrained efficiently.

  On the other hand, when the occupant 18 presses the release button 32 </ b> A of the buckle device 32, the sensor 28 </ b> A detects that the engagement between the tongue plate 28 and the buckle device 32 is released, and sends a detection signal to the control device 52. The control device 52 drives the solenoid 55 of the buckle drive device 38 to remove the stopper 54 from the rack 47 and drives the motor 50 to rotate the pinion 48. As a result, the rack 47 acts in the direction in which the slide block 42 is pulled into the guide base 40, and the stay 44 attached to the tip of the guide base 40 moves the buckle device 32 toward the seat 16, that is, the occupant 18, toward the outside of the vehicle. Move (see imaginary line state in FIG. 4). Thereafter, the control device 52 drives the solenoid 55 to engage the tip chevron of the stopper 54 with the rack 47 and fix the movement of the slide block 42.

  For this reason, the buckle device 32 is held close to the seat 16, so that when the occupant 18 again engages the tongue plate 28 with the buckle device 32, that is, when the occupant 18 mounts the webbing 20 again. Operability can be improved.

  In the first embodiment, when the sensor 28A detects that the tongue plate 28 is engaged with the buckle device 32, that is, the webbing 20 is attached to the occupant 18, the buckle device 32 is moved immediately. However, the present invention is not limited to this. For example, the buckle device 32 may be moved after a predetermined time has elapsed since the webbing 20 was attached to the occupant 18 using a timer or the like, or the running state of the vehicle may be changed. The buckle device 32 may be moved after the vehicle starts to travel after the webbing 20 is mounted on the occupant 18 by using the detecting means.

  Next, another embodiment of the present invention will be described. Note that configurations and operations that are basically the same as those of the first embodiment are given the same reference numerals as those of the first embodiment, and descriptions thereof are omitted.

<Second Embodiment>
FIG. 6 shows a second embodiment of the present invention.

  In this embodiment, the stay 44 to which the buckle device 32 is attached is fixed to the slide block 42 via a bracket 56. The bracket 56 has a plate material bent in a substantially U shape, and is fixed to the tip of the slide block 42 by four bolts 58.

  Therefore, in this embodiment, the stay 44 and the buckle device 32 can be easily removed by removing the bolt 58, and the stay 44 is firmly attached to the slide block 42, so that tension is applied to the webbing 20. It is possible to prevent the buckle device 32 from being pulled toward the seat 16 when it is done.

<Third Embodiment>
FIG. 7 shows a third embodiment of the present invention.

  In this embodiment, a bolt 60 passes through the base end portion of the stay 44 in the vehicle width direction, and the bolt 60 is pivotally supported to the tip of the slide block 42 via the bracket 56. For this reason, the stay 44 can turn around the bolt 60, and the stay 44 is always vertical by the tension of the tension coil spring 62 stretched between the base end portion of the stay 44 and the seat cushion 12 (not shown). The position is maintained.

  The stay 44 turns in the vehicle front-rear direction around the bolt 60 in a state where the buckle device 32 is moved in the vehicle front-rear direction (imaginary line state in FIG. 7), but when the external force acting on the buckle device 32 is eliminated, the tension coil spring The urging force of 62 returns to the vertical position which is the solid line state of FIG.

  For this reason, in this embodiment, the stay 44 can be moved according to the mounting state of the webbing 20 by the occupant 18, and the mounting state can be more closely attached to the occupant's body.

<Fourth Embodiment>
8 and 9 show a fourth embodiment of the present invention.

  In this embodiment, an occupant sensor 66 is provided on the seat cushion 12, and a detection signal thereof is sent to the control device 52. The occupant sensor 66 can detect the weight of the occupant 18 seated on the seat 16 in three stages. That is, the detection signal is sent to the control device 52 in three stages: when the weight of the occupant is smaller than the weight W1, between the weight W1 and the weight W2, or larger than the weight W2.

  The control device 52 can adjust the distance at which the buckle device 32 is separated from the occupant 18 in three stages according to the weight of the occupant 18 detected from the occupant sensor 66. That is, the buckle device 32 is largely separated from the seat 16 according to the weight of the occupant 18.

  FIG. 9 shows an operation flow of the seat belt device according to this embodiment. In this embodiment, as shown in step 100, when an occupant tries to move the vehicle and the ignition key is inserted into the key cylinder and rotated, this is detected by the control device 52 (step 100). Next, when the occupant 18 sits on the seat 16 and engages the tongue plate 28 with the buckle device 32, the sensor 28A detects the engagement state of the tongue plate 28 and sends a signal to the control device 52 (step 102). ).

  Next, the control device 52 determines a signal from the occupant sensor 66 (step 104). Since the occupant sensor 66 detects the weight of the occupant 18, the control device 52 adjusts the driving amount of the motor 50 in accordance with the weight (step 106). According to the instruction from the control device 52, the motor 50 drives the slide block 42 greatly when the occupant 18 is large, and drives the slide block 42 in three stages when the occupant 18 is small. The buckle device 32 is moved from the seat 16 to the side of the vehicle when the occupant 18 is large, and the amount of movement from the seat 16 is moved small when the occupant 18 is small (step 110). . Thereafter, the control device 52 stops the motor 50 in step 112 (step 112), and drives the solenoid 55 to lower the stopper 54 to fix the moving positions of the slide block 42 and the buckle device 32 (step 114). . Thereby, the amount of movement of the buckle device 32 from the seat 16 can be changed according to the weight (≈physique) of the occupant 18.

  Next, when the occupant 18 stops the vehicle and presses the release button 32A of the buckle device 32 to release the engagement of the tongue plate 28, this is detected by the sensor 28A and a signal is sent to the control device 52 (step 118). ). As a result, the control device 52 releases the power supply to the buckle drive device 38 (step 120).

<Fifth Embodiment>
10 to 12 show a fifth embodiment of the present invention. In this embodiment, a buckle driving device 71 different from the buckle driving device 38 according to each of the above embodiments is provided. The buckle drive device 71 is configured to move the buckle device 32 while drawing an arc locus instead of moving the buckle device 32 in the vehicle width direction.

  As shown in FIGS. 10 and 11, the buckle driving device 71 has a cylindrical portion 72 attached to the base end portion 44 </ b> A of the stay 44. The axial center of the cylindrical portion 72 is directed in the vehicle front-rear direction, and can turn around a support shaft 73 attached to the seat 16. A pinion 74 is fixed to one end in the longitudinal direction of the cylindrical portion 72. A rack 76 is engaged with the pinion 74. The rack 76 is movable in the vehicle width direction, and the base end portion is accommodated in the inflator 78. This inflator 78 is connected to the control device 52.

  The control device 52 is electrically connected to a collision prediction sensor 79 (millimeter wave radar in the fifth embodiment) as a collision prediction means attached to the vehicle. In the event of a vehicle emergency when the collision prediction sensor 79 detects a vehicle collision state or a vehicle collision prediction state, the control device 52 pushes the rack 76 out of the inflator 78 and rotates the pinion 74, thereby causing the buckle device 32 to move in the vehicle width. It is separated from the sheet 16 on the inner side in the direction (see arrow B in FIG. 12). For this reason, also in this embodiment, the slack between the webbing 20 and the occupant 18 can be reduced when the buckle driving device 71 is operated, and the occupant restraint of the shoulder webbing 20 can be improved.

  In addition, in this embodiment, the operation of the buckle drive device 71 is limited to a vehicle collision or a collision prediction state, so that the webbing 20 can be loosely attached to the occupant 18 without being in close contact with the occupant 18 in a normal traveling state. It has become. Further, in this embodiment, the buckle driving device 71 is configured to move the buckle device 32 and the stay 44 while drawing an arc locus, so that the movement space of the buckle device 32 and the stay 44 can be reduced.

  Note that the inflator 78 in this embodiment can be replaced with the motor 50 in each of the above embodiments, and also in each of the above embodiments, the webbing 20 is closely attached to the occupant 18 only in a vehicle collision or collision prediction state. It is possible.

<Sixth Embodiment>
13 to 15 show a sixth embodiment of the present invention. In this embodiment, an operating shaft 82 is attached to the inflator 78 of the buckle driving device 81, and the inflator 78 pushes the operating shaft 82 in the axial direction according to an instruction from the control device 52. A housing 84 is fixed to the tip of the operating shaft 82. The housing 84 has an arcuate portion 84A that accommodates the circular base end portion 44A of the stay 44, and holds the stay base end portion 44A rotatably within a range of a predetermined angle θ. For this reason, the stay 44 can rotate in the vehicle front-rear direction around the axis of the operating shaft 82 by the angle θ, and the occupant 18 can move the buckle device 32 according to the posture of the occupant 18 with the webbing 20 attached.

  As shown in FIGS. 13 and 14, a cover 86 is fixed to the housing 84 so that the stay base end portion 44 </ b> A is not detached. It can turn until it hits the end portions 84B and 84C.

  In this embodiment, since the buckle device 32 can turn in the vehicle longitudinal direction together with the stay 44 in the normal vehicle traveling state, the operability when the occupant engages the tongue plate 28 with the buckle device 32 is improved. At the same time, when the load acting on the webbing 20 becomes excessive, the load can be released. Further, the passenger can take a free riding posture with the webbing attached.

  Further, when the collision prediction sensor 79 detects that the vehicle has entered a collision or a collision prediction state, the inflator 78 pushes the operating shaft 82 from the inflator 78 inward in the vehicle width direction according to an instruction from the control device 52, so the buckle device 32. Like the above-described embodiments, the lap webbing 20 </ b> A and the shoulder webbing 20 </ b> B are closely attached to the occupant 18 apart from the seat 16. Also in this embodiment, since the buckle device 32 moves inward in the vehicle width direction, the shoulder webbing 20B can be moved upward in the vehicle, and the occupant restraint of the shoulder webbing 20B can be improved.

  In the first to sixth embodiments, the case where the seat belt device of the present invention is applied to the driver's seat of the vehicle has been described. However, the seat belt device of the present invention is a vehicle. When applied to both a driver's seat and a passenger seat, for example, a buckle drive device for a driver seat and a buckle drive device for a passenger seat are connected by a link or a wire, and these two buckle drive devices are connected. May be driven by a single drive source.

It is a disassembled perspective view which shows the buckle drive device with which 1st Embodiment of this invention was applied. It is a perspective view which shows the slide block drawing-in state of the buckle drive device of 1st Embodiment of this invention. It is a perspective view which shows the state by which the slide block of the buckle drive device which concerns on 1st Embodiment of this invention was extruded from the guide base. It is the front view which looked at the seatbelt device to which a 1st embodiment of the present invention was applied from the vehicles front. FIG. 5 is a left side view of FIG. 4. It is a disassembled perspective view which shows 2nd Embodiment of this invention. It is a disassembled perspective view which shows 3rd Embodiment of this invention. It is the front view seen from the vehicle front which shows 4th Embodiment of this invention. It is a flowchart used for 4th Embodiment of this invention. It is a perspective view which shows 5th Embodiment of this invention. It is a perspective view of the operation state which shows 5th Embodiment of this invention. It is the front view seen from the vehicle front which shows the vehicle seat to which 5th Embodiment of this invention was applied. It is a disassembled perspective view which shows 6th Embodiment of this invention. It is a perspective view which shows 6th Embodiment of this invention. It is a perspective view which shows the normal driving | running | working state with which 6th Embodiment of this invention was applied.

Explanation of symbols

10 Seat belt device 16 Seat (seat)
18 occupant 20 webbing 20A lap webbing 20B shoulder webbing 28 tongue plate 28A tongue plate detection sensor (detection means)
32 Buckle device 38 Buckle drive device (actuator, moving means)
44 stay 52 control device (moving means)
71 Buckle drive (moving means)
78 Inflator 79 Collision prediction sensor (collision prediction means)
81 Buckle drive (moving means)

Claims (7)

A locking member for locking the passenger waist side of the shoulder webbing to the vehicle;
After the shoulder webbing is mounted on the occupant, the moving means for separating the locking member laterally with respect to the seat on which the occupant is seated;
A vehicle seat belt apparatus comprising:   The locking member includes a tongue plate to which the shoulder webbing is locked and a buckle to which the tongue plate is engaged, and detection means for detecting that the tongue plate is engaged with the buckle. The vehicle seat belt device according to claim 1, wherein when the engagement is detected, the moving means separates the buckle laterally with respect to the seat.   The vehicle seat belt device according to claim 2, wherein the moving means includes an actuator that moves the buckle toward and away from the seat sideways.   A collision prediction means for predicting a collision of a vehicle is provided, and when the vehicle collision prediction is detected by the collision prediction means, the moving means separates the locking member laterally with respect to the seat. The vehicle seat belt device according to claim 1.   The vehicle seat belt device according to claim 4, wherein the moving unit includes an inflator that moves the locking member away from the seat sideways.   The retractor that winds up the shoulder webbing, and the retractor has a pretensioner mechanism that forcibly winds the shoulder webbing onto the retractor, and the pretensioner mechanism is configured such that the moving means includes the locking member. The vehicle seat belt device according to any one of claims 1 to 5, wherein the vehicle seat belt device is operated after being separated from the seat sideways.   The seat belt device according to any one of claims 1 to 6, wherein the buckle is attached to a distal end portion of a stay, and a proximal end portion of the stay is moved by the moving means.

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