JP2009234314A - Seat belt device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat belt device for a vehicle capable of quickly pulling in an occupant to an inner side in a vehicle width direction at a side collision. <P>SOLUTION: Webbing 22 drawn out of a drawing port 30 of a shoulder anchor 28 provided on a shoulder at an inner side in a vehicle width direction of a seat back 12 is obliquely crossed and constrained to the upper body of the occupant 11 and folded at a belt tongue 32, and the webbing constrains a lower limb of the occupant 11 as a wrap belt 26. The shoulder anchor 28 is made movable to a lower side of the vehicle body along a slit 13 formed at the shoulder at an inner side in a vehicle width direction of the seat back 12 as an arrow 29. Thereby, the drawing port 30 formed at the shoulder anchor 28 also becomes movable to a lower side of the vehicle body. A buckle 40 engaged with the belt tongue 32 is fixed to a movable part 44 moved in the seat back 12 along a rail 46 extended and fixed in the vehicle width direction at the inside of the seat back 12 by a constraining part 42, and made movable in the vehicle width direction accompanied by the movement of the movable part 44. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle seat belt device.

  Conventionally, there is a structure that restrains an occupant to a seat with a seat belt and moves the occupant inward in the vehicle width direction together with the seat at the time of a side collision (side collision) to avoid a collision with the occupant's door (for example, Patent Documents) 1).

Further, there is disclosed a structure in which an airbag is built in the tongue plate portion of the seat belt, the position of the shoulder belt portion is pushed up by inflating when the vehicle collides, and the shoulder belt portion is passed near the center of the chest of the occupant ( For example, see Patent Document 2).
JP 2002-362205 A JP 2007-203898 A

  However, in the structure disclosed in Patent Document 1, a gap between the side surface of the vehicle body and the occupant that is immersed in the vehicle interior at the time of a side collision is secured, but when the moving seat stops, the occupant is pushed inward in the vehicle width direction as it is. There is a fear.

  Further, in the structure disclosed in Patent Document 2, it is impossible to avoid contact between the side surface of the vehicle body that is immersed in the passenger compartment and the occupant during a side collision.

  In consideration of the above-described facts, an object of the present invention is to provide a vehicle seat belt device that can quickly draw an occupant inward in the vehicle width direction when a side collision occurs.

  A vehicle seat belt device according to a first aspect of the present invention is provided in a seat back, a first retractor that winds up one end of a webbing, and an inner shoulder in the vehicle width direction of the seat back. The webbing is drawn out, and the seatback is provided at the vehicle width direction outer side end and the vehicle body lower side end, and extends in the vehicle width direction in the seatback. An engaged means capable of moving inward in the vehicle width direction along the rail and a built-in airbag, holding an intermediate portion of the webbing pulled out from the pull-out port and engaging with the engaged means. And a second retractor that winds up the other end of the webbing and that is close to a sensor provided on the vehicle body. When the side collision is detected, the outlet moves in the vehicle width direction and the vehicle body downward, and after the airbag is inflated, the engaged means moves in the vehicle width direction and the first The webbing is wound up by a retractor and the second retractor.

  According to the above configuration, the outlet provided in the shoulder in the vehicle width direction of the seat back moves inward in the vehicle width and downward in the vehicle body, and is provided in the outer end in the vehicle width direction and lower end of the vehicle body in the seat back. The engaged portion is moved inward in the vehicle width direction, and both ends of the webbing are wound up by the first retractor and the second retractor, so that the occupant can be moved inward in the vehicle width direction while being restrained by the seat. it can. Further, the load on the occupant can be reduced by the expansion of the airbag built in the engaging means.

  The vehicle seat belt device according to a second aspect of the present invention is the configuration according to the first aspect, wherein the engaging means includes a plurality of engaging portions that are engaged with the engaged means. It is characterized by.

  According to the above configuration, the engaging means can withstand the load with high strength when the occupant is moved by being engaged with the engaged means by the plurality of engaging portions.

  According to a third aspect of the present invention, there is provided a vehicle seat belt device according to the first or second aspect of the present invention, wherein the seat back of the seat back is closer to the front of the vehicle than the rail in the vehicle width direction along the rail. It is characterized by having a weak part.

  According to the above configuration, the engaged means can move smoothly by moving inward in the vehicle width direction while cutting the weak portion provided in the seat back.

  Since the vehicle seat belt device according to the present invention has the above-described configuration, an excellent effect is obtained in that the occupant can be quickly drawn inward in the vehicle width direction at the time of a side collision.

<Outline of structure>
An embodiment of a resin member mounting structure according to the present invention will be described with reference to FIGS.

  In each figure, the arrow FR indicates the vehicle body front direction, the arrow RE indicates the vehicle body rear direction, the arrow UP indicates the vehicle body upward direction, the arrow IN indicates the vehicle body inner side, and the arrow OUT indicates the vehicle body outer side.

  FIG. 1 shows a seat 10 including a vehicle seat belt device according to an embodiment to which the present invention is applied.

  The seat 10 includes a seat cushion 14 disposed substantially parallel to the floor of the passenger compartment on the inner side in the vehicle width direction of the door 70, and a seat back 12 erected above the vehicle body from the rear end of the vehicle body of the seat cushion 14. Thus, the seat 10 is provided with a seat belt 20 for restraining a seated occupant on the seat 10. The seat belt 20 includes a webbing 22 composed of a shoulder belt 24 from a shoulder anchor 28 to a belt tongue portion 32 and a lap belt 26 from a belt tongue portion 32 to a retractor 34 and peripheral accessories. ing.

  That is, the webbing 22 pulled out from the outlet 30 of the shoulder anchor 28 provided on the shoulder portion on the inner side in the vehicle width direction of the seat back 12 restrains the upper body of the occupant 11 obliquely across the front of the vehicle body and restrains the belt tongue portion. It is folded at 32.

  The webbing 22 folded back by the belt tongue portion 32 is directed inward in the vehicle width direction, and is wound around a retractor 34 provided on the inner side in the vehicle width direction of the seat cushion 14 while restraining the occupant's lower limb from the upper side of the vehicle body.

  The shoulder anchor 28 is movable to the lower side of the vehicle body as indicated by an arrow 29 along the slit 13 provided in the shoulder portion on the inner side in the vehicle width direction of the seat back 12. Thereby, the outlet 30 provided in the shoulder anchor 28 can also be moved to the lower side of the vehicle body.

  The buckle 40 with which the belt tongue 32 is engaged is fixed by a holding portion 42 to a movable portion 44 that extends in the vehicle width direction inside the seat back 12 and moves along the fixed rail 46 in the seat back 12. As the movable portion 44 moves, it can move in the vehicle width direction.

  FIG. 3 shows a structure in the vicinity of the shoulder portion on the inner side in the vehicle width direction of the seat 10 according to the embodiment to which the present invention is applied.

  As shown in FIG. 3A, a slit 13 is provided in the shoulder portion of the seat back 12 on the inner side in the vehicle width direction, and a shoulder anchor 28 provided with a pull-out port 30 is movable along the slit 13. Yes.

  The shoulder anchor 28 is a rotating body provided in the seat back 12 so as to be rotatable in the direction of the arrow 60D on a plane orthogonal to the rotating shaft 60C around the rotating shaft 60C passed in the vehicle longitudinal direction. The shoulder anchor 28 is provided outside the seat back 12 through the slit 13.

  Further, the rotating body 60 is provided with a retractor 62 that winds up the webbing 22, and the webbing 22 is drawn out of the seat back 12 from the retractor 62 through the outlet 30, and becomes a shoulder belt 24.

  As shown in FIG. 3B, the rotating body 60 is held so as to be rotatable about a rotating shaft 60C, and the stopper 68 is normally engaged with an engaged portion 60A provided at the peripheral edge. It is fixed so that it does not rotate.

  In addition, an inner groove 61 that is recessed in the diameter direction is provided on a part of the outer periphery of the rotating body 60, and an absorber 66 is provided so as to fit into the inner groove 61. The absorber 66 is fitted into a hollow outer cylinder 66A rotatably supported on the seat back 12 by a rotating shaft 66C, and slidably fitted inside the outer cylinder 66A, and the end far from the rotating shaft 66C is a rotating shaft. The inner cylinder 66B is rotatably supported in the inner groove 61 by 60B. The inner cylinder 66B may have a hollow cylindrical structure as shown in FIG.

  An inflator 64 that generates gas during operation is provided in the vicinity of the absorber 66, and is connected to the outer cylinder 66A by a tube 65B. Similarly, the inflator 64 is connected to the engaged portion 60A by a tube 65A. Thereby, the gas generated in the inflator 64 is sent to the outer cylinder 66A through the tube 65B. At the same time, the gas is sent to the engaged portion 60A through the tube 65A.

  FIG. 4 shows the structure of the belt tongue portion of the seat 10 according to the embodiment to which the present invention is applied.

  As shown in FIG. 4, the belt tongue portion 32 is provided with a slit 32 </ b> A on the outer periphery, and guides the wound webbing 22 to the vicinity of the hipbone on the outer side in the vehicle width direction of the occupant.

  The belt tongue 32 has a substantially hollow box shape, and an inflator 36 that generates gas during operation is provided therein, and an airbag 38 that is inflated by the gas generated by the inflator 36 is folded and stored. Yes. Further, a fragile portion 38A serving as an outlet when the airbag 38 is inflated is provided inside the belt tongue portion 32 in the vehicle width direction.

  A pair of tongue plates 33 that are engaged with a buckle 40 described later are provided on the rear side of the vehicle body of the belt tongue portion 32. As shown in FIG. 4, a plurality of tongue plates 33 may be provided on substantially the same plane, and further, an operation signal of the inflator 36 is received from the buckle 40 by an electric circuit (not shown) via the tongue plate 33. It may be.

  5 and 6 show the structure inside the seat back of the seat 10 according to the embodiment to which the present invention is applied.

  As shown in FIG. 5, a rail 46 extends in the vehicle width direction inside the seat back 12. A movable portion 44 is provided on the rail 46 so as to be slidable as shown by an arrow 41 on the inner side in the vehicle width direction, and a buckle 40 is held on the front side of the vehicle body by a holding portion 42 protruding from the movable portion 44. . The buckle 40 is provided with an insertion hole 40A into which the tongue plate 33 is inserted and fixed.

  The rail 46 is fixed to the inside of the seat back 12 by a fixing portion 48 provided on the inner side in the vehicle width direction and a fixing member (not shown). Further, as shown in FIG. 5, a plurality of rails 46 may be provided or may have a rectangular cross section or the like, and the movable portion 44 is prevented from tilting in the vertical direction of the vehicle body during sliding movement.

  The skin 12A on the front side of the vehicle body of the seat back 12 is provided with a weak portion 43 such as a perforation or a thin portion along the trajectory of the holding portion 42 when the movable portion 44 moves. The resistance when sliding in the vehicle width direction inside, that is, in the direction of the arrow 41 is reduced.

  As shown in FIG. 6, an absorber 52 is connected to the movable portion 44, and the absorber 52 is connected to the inflator 50 by a tube 51. In the absorber 52, a hollow inner cylinder 53 is inserted into a hollow outer cylinder 52A having a substantially cylindrical shape so as to be slidable in the longitudinal direction, and extends substantially in parallel with the vehicle width direction, that is, the rail 46.

  The movable portion 44 is provided with an engaged portion 44A that is recessed along a surface substantially orthogonal to the rail 46, and the movable portion 44 is mounted on the rail 46 by a stopper 56 that is fitted to the engaged portion 44A. It is fixed in the width direction. A tube 53A is connected from the inner cylinder 53 to the engaged portion 44A and communicates to the outer cylinder 52A.

  An inflator 50 that generates gas during operation is provided in the vicinity of the absorber 52, and is connected to the outer cylinder 52 </ b> A by a tube 51. The gas generated in the inflator 50 is sent to the outer cylinder 52A through the tube 51. At the same time, the gas is sent to the engaged portion 44A through the inner cylinder 53 and the tube 53A. As a result, the gas that has reached the engaged portion 44 </ b> A pushes out the stopper 56, and the movable portion 44 can be moved along the rail 46. The inner cylinder 53 is pushed out in the longitudinal direction by the gas pressure from the outer cylinder 52A and moves inward in the vehicle width direction as indicated by an arrow 41.

  The inner cylinder 53 and the movable part 44 are connected by a tube 53A or a connecting member (not shown), and the movable part 44 also moves inward in the vehicle width as the inner cylinder 53 moves inward in the vehicle width direction. . Accordingly, the holding portion 42 provided in the movable portion 44 and the buckle 40 held by the holding portion 42 are also configured to move inward in the vehicle width direction.

  FIG. 7 shows an operation sequence of the seat belt of the seat 10 according to the embodiment to which the present invention is applied.

  As shown in FIG. 7A, the occupant 11 is held by the shoulder belt 24 obliquely up to the belt tongue 32 from the inner shoulder direction in the vehicle width direction to the outer side in the vehicle width direction and the lower side of the vehicle body. In this state, when a collision from the outside in the vehicle width direction to the side surface closer to the seat 10 occurs, a signal from a side collision sensor (not shown) is transmitted to the belt tongue portion 32 via the buckle 40, and the belt tongue portion 32. The inner inflator 36 is activated and the airbag 38 is inflated.

  At the same time, a signal is also transmitted to the inflator 64 built in the seat back 12 to generate gas and extend the absorber 66. The rotating body 60 is pushed and rotated by the extended absorber 66, whereby the shoulder anchor 28 moves downward as shown by an arrow 29 as shown in FIG. 7B.

  Next, a signal is similarly transmitted to the inflator 50 in the seat back 12 to generate gas, and the absorber 52 is extended. The absorber 52 moves the movable portion 44 inward in the vehicle width direction, and moves the belt tongue portion 32 inward in the vehicle width direction as shown in FIG.

  At this time, the shoulder belt 24 and the lap belt 26 are wound up by the retractor 62 in the seat back 12 and the retractor 34 beside the seat cushion, respectively, so that the webbing 22 is not slackened and the occupant 11 is restrained as indicated by an arrow 41. To the inside in the vehicle width direction.

<Effect>
Next, the operation and effect of the present invention will be described.

  As shown in FIG. 2 (B), when the door 70 enters the vehicle interior (in the vehicle width direction) due to a side collision, the occupant 11 is moved as quickly as possible to the position that does not interfere with the door 70, that is, in the vehicle width direction. It is desirable.

  In the present embodiment, a shoulder anchor 28 provided on the inner shoulder in the vehicle width direction of the seat back 12 at the time of a side collision moves downward in the vehicle body as indicated by an arrow 29 while pulling the shoulder belt 24 while pulling the shoulder belt 24. . As a result, the retracting direction of the shoulder belt 24 approaches the horizontal direction, and the pulling force of the shoulder belt 24 can be increased.

  In the conventional example, since the anchor of the shoulder belt 24 is usually provided in the B pillar, it is difficult to retract the occupant 11 in the vehicle width direction while retracting the shoulder belt 24. Further, if the occupant 11 is retracted while pulling out the shoulder belt 24 in order to cope with a side collision, the shoulder belt 24 may be loosened.

  In the present embodiment, since the shoulder anchor 28 is provided on the inner shoulder in the vehicle width direction of the seat back 12, the occupant 11 can be retracted while the shoulder belt 24 is pulled. For this reason, there is no possibility that the shoulder belt 24 is loosened, and for example, it is possible to avoid a situation in which only the upper body of the occupant 11 is left outside in the vehicle width direction and interferes with the door 70.

  Further, since the shoulder position of the occupant 11 can be regulated on the inner side in the vehicle width direction, that is, on the passenger seat side, the passenger 11 goes too far inward in the vehicle width direction due to the pulling of the shoulder belt 24 and interferes with the passenger on the passenger seat or passenger seat side. Can be avoided.

  In addition, since the occupant 11 can be moved and regulated inward in the vehicle width direction while pulling the shoulder belt 24 even when the vehicle body rolls over, a situation where the occupant 11 falls from the seat 10 can be avoided.

  Further, as shown in FIG. 2A, at the same time, the belt tongue 32 moves inward in the vehicle width direction as indicated by an arrow 41. When the belt tongue 32 pushes the waist of the occupant 11 inward in the vehicle width direction, the occupant 11 can be moved smoothly in addition to the pulling force of the shoulder belt 24 and the lap belt 26.

  Furthermore, when the airbag 38 built in the belt tongue part 32 expand | swells, when pushing the waist | hip | lumbar part of the passenger | crew 11 from the vehicle width direction outer side, the load concerning the passenger | crew 11 can be reduced.

  Since the airbag 38 is built in the belt tongue portion 32, the size is large, and a large load is instantaneously applied between the buckle 40 and the belt tongue portion 32. For this reason, a plurality of tongue plates 33 for engaging the both are provided, and in addition to being able to withstand the load, the tongue plate 33 is used as a terminal for transmitting a signal for operating the inflator 36 built in the belt tongue 32 from the buckle 40. be able to.

  Further, the holding portion 42 that holds the belt tongue portion 32 moves inward in the vehicle width direction while tearing the skin 12A on the front side of the vehicle body of the seat back 12. Since the fragile portion 43 such as a perforation or a thin portion is provided in advance along the locus of the holding portion 42, resistance when the holding portion 42 slides as indicated by an arrow 41 shown in FIG. Can be reduced.

  The embodiments of the present invention have been described above with reference to the embodiments. However, these embodiments are merely examples, and various modifications can be made without departing from the scope of the invention. Further, it goes without saying that the scope of rights of the present invention is not limited to these embodiments and can be implemented in various modes without departing from the gist of the present invention.

  That is, in the above embodiment, the driver's seat on the front side of the vehicle body is taken as an example. However, the present invention is not limited to this, and the present invention can also be applied to a passenger seat or a rear seat. Further, in the above embodiment, the case where the door enters the vehicle interior by side collision has been described as an example. However, the present invention can be applied to other cases such as a rear seat of a two-door body without a rear door. It is possible to apply.

  Further, for the rotation of the rotating body 60 and the movement of the belt tongue portion 32, a repulsive force by a spring, a motor, or the like may be used in addition to using an absorber that expands with a gas pressure generated by an inflator.

  Alternatively, instead of folding a single webbing at the belt tongue as in the above embodiment, a single shoulder belt is provided from the shoulder anchor to the belt tongue, and a single independent belt is provided from the belt tongue to the retractor. It is good also as a structure used as a lap belt.

It is a perspective view which shows a vehicle interior provided with the vehicle seatbelt apparatus which concerns on embodiment of this invention. It is the schematic diagram which showed the structure and operation | movement of the sheet | seat shown by FIG. It is an enlarged view which shows a part of structure of the sheet | seat shown by FIG. It is an expansion perspective view which shows the structure of the belt tongue part of the sheet | seat shown by FIG. It is a perspective view which shows the structure of the seat back of the sheet | seat shown by FIG. FIG. 6 is an enlarged view showing a part of the structure of the seat back shown in FIG. 5. It is a schematic diagram which shows operation | movement of the vehicle seatbelt apparatus which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Seat 11 Crew 12 Seat back 13 Slit 14 Seat cushion 20 Seat belt 22 Webbing 24 Shoulder belt 26 Lap belt 28 Shoulder anchor 30 Drawer 32 Belt tongue (engaging means)
33 tongue plate 34 retractor (second retractor)
36 Inflator 38 Airbag 40 Buckle (engaged means)
41 Arrow 42 Holding part 43 Fragile part 44 Movable part 46 Rail 48 Fixed part 50 Inflator 51 Tube 52 Absorber 56 Stopper 60 Rotating body 62 Retractor (first retractor)
64 Inflator 66 Absorber 68 Stopper 70 Door

Claims (3)

A first retractor built in the seat back and winding one end of the webbing;
Provided on the inner shoulder in the vehicle width direction of the seat back, movable inward in the vehicle width direction and downward in the vehicle body, and an outlet from which the webbing is drawn out;
An engaged means provided at an outer end in the vehicle width direction and at a lower end of the vehicle body of the seat back, and is movable inward in the vehicle width direction along a rail extending in the vehicle width direction in the seat back; ,
An engagement means that incorporates an air bag, holds an intermediate portion of the webbing drawn from the outlet, and is engaged with the engaged means;
A second retractor that is provided on the vehicle width direction inside of the seat back and on the vehicle body lower side and winds up the other end of the webbing,
When a sensor provided on the vehicle body detects a side collision from the near side, the outlet moves inward in the vehicle width direction and downward in the vehicle body, and after the airbag is inflated, the engaged means is moved in the vehicle width direction. A vehicle seat belt device that moves inward and winds up the webbing by the first retractor and the second retractor. The vehicle seat belt device according to claim 1, wherein the engaging means includes a plurality of engaging portions engaged with the engaged means. 3. The vehicle seat belt device according to claim 1, wherein a weak portion is provided in a vehicle width direction along the rail on a front side of the vehicle body relative to the rail of the seat back.

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