JP2000095061A - Seat belt device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the damage of a retractor at the time of a rear-end collision of a vehicle without providing the retractor with a reinforcing member or the like in a seat belt device with the retractor fitted to a rear header of closed cross section structure provided at the rear end of a roof part of the vehicle. SOLUTION: A retractor 11 is provided in front of a rear header 25 so that the front end of the retractor 11 is a free end and that a seat belt 18 can be pulled out backward from the retractor 11. A sash guide 43 with a belt guide part 43a changing the pull-out direction of the seat belt 18 pulled out backward from the retractor 11, into the direction of an occupant restrained by the seat belt 18 is provided behind the retractor 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the technical field of a seat belt device for a vehicle including a seat belt and a retractor for winding the seat belt so that the seat belt can be wound up and pulled out.

[0002]

2. Description of the Related Art Conventionally, as a seat belt device for a rear row center seat, for example, French Patent Publication No.
As shown in FIG. 1, a seat belt is known in which a retractor is attached to a closed-section vehicle body member (a so-called rear header) having a closed-section structure provided at a rear end of a vehicle roof. In the apparatus, the retractor is provided in front of the rear header via a support bracket fixedly mounted on the rear header and a roof reinforcement disposed in front of the rear header. The seat belt is pulled forward from the front of the retractor, and the direction in which the seat belt is pulled out is set to the direction of the occupant restrained by the seat belt by a guide member provided in front of the retractor. Has been made to convert.

[0003]

However, in the above-mentioned conventional vehicle, when a rear collision occurs in the vehicle, the rear header moves forward with little deformation due to its relatively high strength. The located retractor may be pushed forward by its rear header, and may be damaged by being pinched between the high strength rear header and the roof reinforcement. In order to prevent such damage to the retractor, it is necessary to take measures such as providing a new reinforcing member to the retractor, resulting in an increase in cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to devise a method of attaching a retractor to a vehicle seat belt device in which a retractor is attached to a rear header. Accordingly, an object of the present invention is to prevent the retractor from being damaged at the time of a rear collision of the vehicle as much as possible without providing a reinforcing member or the like to the retractor.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, the retractor is provided in front of the rear header such that the front end of the retractor is a free end.

Specifically, according to the present invention, a closed cross-sectional structure including a seat belt and a retractor for winding the seat belt so as to be able to be wound up and pulled out, and the retractor is provided at a rear end of a vehicle roof portion. It is assumed that the vehicle seat belt device is attached to a closed cross-section vehicle body member.

The retractor is provided in front of the vehicle body member with the closed cross section so that the front end of the retractor is a free end and the seat belt can be pulled backward from the retractor. It is assumed that guide means having a belt guide for changing the direction in which the seat belt is pulled rearward from the retractor to the direction of the occupant restrained by the seat belt is provided.

Thus, even when the vehicle body member in the closed section moves forward during a rear collision of the vehicle, the retractor moves forward together with the vehicle body member in the closed section because the front end of the retractor is not supported. And since it is not necessary to provide a member having high strength to support the retractor in the moving space of the retractor, it is not possible for the retractor to be sandwiched between such a member having high strength and a vehicle body member having a closed cross section. Absent. As a result, the damage can be prevented without providing a reinforcing member or the like in the retractor. In addition, since the seat belt is once pulled backward from the retractor, the fit of the seat belt to the occupant can be improved regardless of the position in the front-rear direction of the seat on which the occupant restrained by the seat belt is seated. Can be.
On the other hand, when the retractor moves forward in the case of a rear collision, the seat belt is loosened. However, if the guide means is moved forward together with the retractor, for example, by providing the guide means on a vehicle body member having the same closed cross section as the retractor, And the distance between the guide means and the belt guide portion of the guide means can be hardly changed, and the slack of the seat belt can be suppressed as small as possible. Therefore, at the time of a rear collision, the occupant can be reliably restrained by the seat belt and effectively protected.

According to a second aspect of the present invention, there is provided a closed cross-sectional structure including a seat belt and a retractor for winding the seat belt so that the seat belt can be wound up and pulled out, and the retractor is provided at a rear end of a vehicle roof. It is assumed that a vehicle seat belt device is attached to a vehicle body member having a closed cross section.

The retractor is provided inside the vehicle body member having the closed cross section.

According to the present invention, since the retractor is provided inside the high-strength rear header, the retractor can be effectively protected against a rear collision of the vehicle as in the first aspect of the invention.

According to a third aspect of the present invention, in the second aspect of the present invention, the retractor is attached to the closed section vehicle body member so that the seat belt can be pulled backward from the retractor. In the above, a guide means having a belt guide portion for changing a pull-out direction of the seat belt pulled out rearward from the retractor to a direction of an occupant restrained by the seat belt is provided behind the retractor.

[0013] Thus, as in the first aspect of the present invention, it is possible to improve the fit of the seat belt with respect to the occupant, and also to protect the guide means in the event of a rear collision, and to guide the belt between the retractor and the guide means. The distance between the seat belt and the seat belt can be kept substantially constant, and the loosening of the seat belt can be minimized.

According to a fourth aspect of the present invention, in the first aspect of the present invention, it is assumed that the belt guide portion of the guide means is located below the lower surface of the retractor.

In this way, even if the rear-end collision energy is large and the belt guide of the guide means moves to the retractor, the seat belt is sandwiched and fixed between the retractor and the belt guide of the guide means. Can be prevented.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, the retractor includes a pair of opposed portions extending in the up-down direction and opposed to each other in the vehicle width direction and the up-down direction of the two opposed portions. A frame comprising an attachment portion connecting one end thereof and attached to the vehicle body member having a closed cross section, and a winding shaft provided between both opposing portions of the frame so as to extend in the vehicle width direction and winding a seat belt. The seat belt is wound around the winding shaft so as to be pulled out from the mounting portion side in the vertical direction of the rear surface of the retractor.

As a result, even if a tensile load is applied to the retractor via the seat belt, the distance between the front end portions (end portions opposite to the mounting portion) of both opposing portions in the frame of the retractor increases (opening deformation). ) And an advantageous configuration is obtained in terms of ensuring the strength of the retractor frame.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects of the present invention, the tip tang engages with the first buckle disposed on one end of the seat belt in the width direction of the seat. Is provided on the other side in the width direction of the seat at the intermediate portion of the seat belt.
It is assumed that an intermediate tongue that engages with the buckle is provided. With this configuration, the three-point seat belt can be easily configured, and the occupant can be reliably restrained.

According to a seventh aspect of the present invention, in any one of the first to fifth aspects of the present invention, it is assumed that the vehicle seat belt device is set for a rear row center seat.

Thus, a three-point seat belt can be easily formed in the center seat in the rear row where only a two-point seat belt can be normally formed.

According to an eighth aspect of the present invention, in the seventh aspect of the present invention, the retractor is disposed substantially directly above the rear middle seat.

With this, when the seatbelt is worn, the twisting of the seatbelt can be suppressed, and a three-point seatbelt is formed on the left and right side seats located on both sides in the width direction of the central seat. In addition, interference with the seat belt can be prevented.

[0023]

(Embodiment 1) FIG. 2 shows a vehicle 1 equipped with a seat belt device according to Embodiment 1 of the present invention.
The rear portion of the vehicle 1 is provided with a rear row seat 2. The rear row seat 2 includes left and right side seats 3 and 3 and a central center seat 4 (rear row center seat). The seat belt device is set for the center seat 4.

A first buckle 5 is provided on one side (the right side in FIG. 2) in the seat width direction at the connecting portion between the seat back 4a and the seat cushion 4b of the center seat 3, and the other side (the left side in FIG. 2). 2) A second buckle 6 is provided on the side surface, and both buckles 5 and 6 project upward by a predetermined amount from the seating surface of the seat cushion 4b.

A retractor 11 is provided on a roof portion located almost directly above the central seat 4.
1, the seat belt 18 is pulled out as described later. As shown in FIG. 3, the retractor 11 includes a pair of opposing portions 13 a, 13 a extending in the up-down direction and opposed to each other in the vehicle width direction inside the outer case 12.
It has a frame 13 which connects the lower ends of the opposed portions 13a, 13a to each other and is attached to a rear header 25 (closed cross section vehicle body member) as will be described later. A winding shaft 14 that extends in the vehicle width direction and that winds a seat belt 18 is provided between the two opposing portions 13 a of the frame 13. And
The seat belt 18 is wound around the winding shaft 14 so as to be pulled out from the mounting portion 13b side (lower side) in the vertical direction of the rear surface of the retractor 11. That is, the retractor 11 is configured to be a so-called forward drawer, and has a different configuration from a reverse drawer that is pulled out from the opposite side (upper side) of the rear surface of the retractor 11 from the mounting portion 13b.

A front end tongue 19 for engaging with the first buckle 5 is fixed to the front end of the seat belt 18, while the second tongue 19 is fixed to an intermediate portion of the seat belt 18.
An intermediate tongue 20 that engages with the buckle 6 is provided movably in the length direction of the seat belt 18.

At the rear end of the roof portion of the vehicle 1, FIG.
As shown in FIG. 1, a rear header 25 (closed cross section vehicle body member) having a closed cross section structure is provided. This rear header 2
The upper and rear portions of 5 are constituted by a roof panel 26,
The lower part and the front part of the rear header 25
Rear header panel 27 fixed to the lower surface of 6 by welding
It consists of. Behind the rear header 25, a hinge shaft 30 attached to the rear header 25 is provided.
A back door 31 configured to be rotatable around is provided.

A bracket 34 is attached and fixed to the lower front portion of the rear header 25 with bolts 35 and nuts 36 so as to project forward of the rear header 25. The rear end of the mounting portion 13b of the frame 13 in the retractor 11 is mounted and fixed on the upper surface of the front end of the bracket 34 with bolts 38 and nuts 39 so that the retractor 11 is located in front of the rear header 25. I have. The front portion of the retractor 11 is not supported at all, so that the retractor 11 is attached to the rear header 25 via the bracket 34 such that the front end of the retractor 11 is a free end.

The retractor 11 is attached to a bracket 34 so that the seat belt 18 can be pulled out rearward.
A sash guide 43 having a belt guide portion 43a for converting the direction of withdrawal of the seat belt 18 pulled backward from the retractor 11 to the direction of an occupant restrained by the seat belt 18 (occupant seated on the central seat 4).
(Guide means) is provided. The sash guide 43 is provided with a bolt 44 and a nut at a mounting portion 43b formed on the rear side of the belt guide portion 43a at a rear portion of the lower portion of the rear header 25 so as to be located immediately below the lower portion of the rear header 25. It is attached and fixed by 45. And the belt guide portion 43a of the sash guide 43 is
The lower surface of the retractor 11, that is, the lower surface of the mounting portion 13b of the frame 13 of the retractor 11, is located slightly below. The bracket 34 has a through hole 34a through which the seat belt 18 can pass.

A roof trim 48 is provided below the roof of the vehicle 1 to separate the roof from the vehicle compartment.
The roof trim 48 is bent upward at a predetermined position in the horizontal direction with respect to the retractor 11 at a position in front of the retractor 11. This interval is set even if the retractor 11 moves forward during a rear collision of the vehicle 1 as described later.
The retractor 11 is set so as not to contact the roof trim 48.

The belt guide 4 of the sash guide 43
The seat belt 18 whose direction has been changed by 3a passes through a bezel 49 provided on the roof trim 48 and is guided into the vehicle interior. When the seat belt 18 is not worn, the seat belt 1 is
8 is wound up, the tip tongue 19 and the intermediate tongue 20
Are located immediately below the bezel 49. In addition, at the time of wearing, the seat belt 18 is pulled out from the retractor 11 by pulling the tip tang 19 downward, the tip tang 19 is engaged with the first buckle 5, and the intermediate tongue 20 is engaged with the second buckle 6. By combining them, a three-point seat belt is configured (see FIG. 1).

A rear collision occurs in the vehicle 1 and the rear header 2
5 moves forward, the front end of the retractor 11 is not supported, so that the retractor 11
5 and move forward. Since there is a sufficient space between the retractor 11 and the roof trim 48, the retractor 11 does not come into contact with the roof trim 48 and is not damaged at all. Even if the retractor 11 abuts on the roof trim 48, the roof trim 48 is not as strong as the rear header 25, so that in this case also, the retractor 11 can be prevented from being damaged. As a result, it is not necessary to provide the retractor 11 with a special reinforcing member or the like. Further, since the seat belt 18 is once pulled out rearward from the retractor 11, the fit of the seat belt 18 to the occupant sitting on the center seat 4 is improved regardless of the position of the center seat 4 in the front-rear direction. In addition, the seat belt 18 is loosened due to the forward movement of the retractor 11 at the time of a rear collision. However, since the sash guide 43 is fixedly attached to the rear header 25, the belt guide portion of the retractor 11 and the sash guide 43 is provided. 43a, the change in the distance to the seat belt 1 is small.
The slack of 8 can be kept very small. Therefore, the occupant of the center seat 4 can be reliably restrained by the seat belt 18 at the time of a rear collision.

Further, since the belt guide 43a of the sash guide 43 is located below the lower surface of the retractor 11, the belt guide 43a is
1 is applied to the rear header 25, the seat belt 18 is not fixed between the retractor 11 and the belt guide 43a. Can be prevented from being unable to be wound and pulled out.

The seat belt 18 is connected to the retractor 1.
1 is wound around the winding shaft 14 so as to be pulled out from the mounting portion 13b side in the vertical direction of the rear surface of the retractor 11 even if a tensile load is applied to the retractor 11 via the seat belt 18. In this case, the distance between the upper ends of the opposed portions 13a, 13a (the end opposite to the mounting portion 13b) does not increase (the opening is deformed), and the reliability of the strength of the frame 13 can be improved. .

In the first embodiment, the retractor 11
The frame 13 is mounted on the upper surface of the bracket 34 with the mounting portion 13b of the frame 13 facing downward.
Upside down, that is, the bracket 13 may be mounted on the lower surface of the front end of the bracket 34 with the mounting portion 13b facing upward. Also in this case, in order to prevent the seat belt 18 from being pinched between the retractor 11 and the belt guide portion 43a, the lower surface of the outer case 12 (below the retractor 11) is a belt guide portion of the sash guide 43. 43
It is desirable to be located higher than a. For this purpose, the tip of the bracket 34 to which the retractor 11 is attached may be located near the roof panel 26.

(Embodiment 2) FIG. 4 shows Embodiment 2 of the present invention (note that the same parts as those in FIG. 1 are denoted by the same reference numerals and detailed description thereof is omitted). 25 is provided inside.

That is, in the second embodiment, the internal space of the rear header 25 is expanded forward from that of the first embodiment, and inside the rear header 25,
The front end of the mounting portion 13b of the frame 13 in the retractor 11 is mounted and fixed by bolts 38 and nuts 39. On the other hand, the sash guide 43 is provided at the same position as in the first embodiment, and a through hole 25a through which the seat belt 18 can pass is formed near the belt guide portion 43a of the sash guide 43 below the rear header 25. I have.

Therefore, in the second embodiment, the vehicle 1
Even if a rear collision occurs, the strong rear header 25
Thus, damage to the retractor 11 can be prevented.
Further, as in the first embodiment, since the seat belt 18 is once pulled out rearward from the retractor 11, the looseness of the seat belt 18 can be suppressed and the central seat 4 can be kept small.
The fit of the seat belt 18 to the occupant can be improved.

In the second embodiment, the sash guide 43 is provided below the lower portion of the rear header 25 as in the first embodiment. However, as shown in FIG. May be provided. That is, the sash guide 43 is connected to the rear header 2
5 At the rear of the upper part, a bolt 44
And the nut 45. By doing so, both the retractor 11 and the sash guide 43 are protected, and the retractor 11 and the sash guide 4 are protected.
The distance from the third belt guide portion 43a can be kept substantially constant, and the loosening of the seat belt 18 can be minimized.

Also, in the second embodiment, the mounting portion 13b of the frame 13 of the retractor 11 may be mounted on the upper portion of the rear header 25 with the mounting portion 13b facing upward.

Further, in each of the first and second embodiments, the rear row seat 2 is constituted by the three seats 3, 3, and 4. However, the rear seat 2 may be constituted by a single seat integrated with the three seats. In that case, the seatbelt device of the present invention may be applied to the central seat set at the center of the seat. In addition, the present invention can be applied to not only the center sheet 4 but also each side sheet 3.

[0042]

As described above, according to the first aspect of the present invention, a seat belt device for a vehicle in which a retractor is attached to a vehicle body member having a closed sectional structure provided at a rear end portion of a vehicle roof portion. In contrast, a retractor is provided in front of the vehicle body member with the closed cross section so that the front end of the retractor is a free end and the seat belt can be pulled backward from the retractor, and the seat belt is pulled out behind the retractor. The provision of the guide means having a belt guide portion for changing the direction to the direction of the occupant can prevent the retractor from being damaged at the time of a rear collision of the vehicle without providing a reinforcing member or the like to the retractor, and can provide a seat belt. Can be kept as small as possible.

According to the second aspect of the present invention, since the retractor is provided inside the vehicle body member having the closed cross section, it is possible to effectively protect the retractor against a rear collision of the vehicle.

According to the third aspect of the present invention, the retractor
A belt that is attached to the inside of a closed-section vehicle body member so that the seat belt can be pulled backward from the retractor, and converts the seat belt withdrawal direction to the direction of an occupant behind the retractor inside the closed-section vehicle body member. By providing the guide means having the guide portion, the loosening of the seat belt can be suppressed to a minimum.

According to the fourth aspect of the present invention, since the belt guide portion of the guide means is positioned below the lower surface of the retractor, even if a rear impact with a large impact force occurs, the seat belt can move between the retractor and the guide means. It can be prevented from being sandwiched and fixed between the belt guide portion.

According to the fifth aspect of the present invention, since the seat belt is wound around the winding shaft so as to be pulled out from the mounting portion in the vertical direction of the rear surface of the retractor, the reliability of the retractor in terms of the strength of the frame is improved. Improvement can be achieved.

According to the sixth aspect of the present invention, the front end of the seat belt is provided with a front tongue that engages with the first buckle disposed on one side in the width direction of the seat, while the intermediate portion of the seat belt is provided with A second sheet disposed on the other side in the width direction of the sheet;
By providing an intermediate tongue that engages with the buckle,
A three-point seat belt can be easily configured.

According to the seventh aspect of the present invention, since the seat belt device is set for the rear center seat, a three-point seat belt for the rear middle seat can be easily achieved.

According to the eighth aspect of the present invention, the retractor is disposed substantially directly above the center seat in the rear row, so that the seat belt can be prevented from being twisted when the seat belt is worn, and the seat belts for the left and right side seats are provided. Interference can be prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a seat belt device according to a first embodiment of the present invention.

FIG. 2 is a schematic perspective view showing a rear portion of the vehicle.

FIG. 3 is a perspective view showing a retractor and a seat belt.

FIG. 4 is a view corresponding to FIG. 1 showing a second embodiment.

FIG. 5 is a diagram corresponding to FIG. 1 showing a modification of the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle 4 Central seat (rear row central seat) 5 First buckle 6 Second buckle 11 Retractor 13 Frame 13a Opposing portion 13b Mounting portion 14 Winding axis 18 Seat belt 19 Tip tongue 20 Intermediate tongue 25 Rear header 34 Bracket 43 Sash Guide (guide means) 43a Belt guide

Claims (8)

[Claims] 1. A closed-section vehicle body member having a closed-section structure comprising a seatbelt and a retractor that winds the seatbelt so that the seatbelt can be taken up and pulled out, wherein the retractor is provided at a rear end of a vehicle roof. In the seat belt device for a vehicle to be attached, the retractor is provided in front of the vehicle body member with the closed cross section so that a front end of the retractor is a free end and the seat belt can be pulled backward from the retractor. A vehicle provided with a belt means having a belt guide for changing the direction in which a seat belt pulled out rearward from the retractor is pulled out to the direction of an occupant restrained by the seat belt is provided behind the retractor. Seat belt equipment. 2. A closed-section vehicle body member having a closed-section structure including a seat belt and a retractor that winds the seat belt so that the seat belt can be taken up and pulled out, and the retractor is provided at a rear end of a vehicle roof portion. A seat belt device for a vehicle, wherein the retractor is provided inside the vehicle body member having a closed cross section. 3. The vehicle seat belt device according to claim 2, wherein the retractor is attached to the vehicle body member having a closed cross section so that the seat belt can be pulled backward from the retractor. A guide means having a belt guide for changing a pull-out direction of a seat belt pulled rearward from the retractor to a direction of an occupant restrained by the seat belt is provided behind the retractor. Vehicle seat belt device. 4. The vehicle seat belt device according to claim 1, wherein the belt guide portion of the guide means is located below the lower surface of the retractor. 5. The vehicle seat belt device according to claim 1, wherein the retractor includes a pair of opposing portions extending in a vertical direction and disposed to oppose each other in a vehicle width direction. A frame comprising an attachment portion connected to one end in the vertical direction and attached to the vehicle body member having a closed cross section, and a winding shaft provided between both opposing portions of the frame so as to extend in the vehicle width direction and winding a seat belt. The seat belt device for a vehicle, wherein the seat belt is wound around the winding shaft so as to be pulled out from the mounting portion side in a vertical direction of a rear surface of a retractor. 6. The seat belt device according to claim 1, wherein the front end of the seat belt is engaged with a first buckle disposed on one side in a width direction of the seat. The vehicle according to claim 1, wherein the tongue is provided, and an intermediate tongue is provided at an intermediate portion of the seat belt so as to engage with a second buckle disposed on the other side in the width direction of the seat. Seat belt device. 7. The vehicle seat belt device according to claim 1, wherein the seat belt device is set for a rear-row center seat. 8. The vehicle seat belt device according to claim 7, wherein the retractor is disposed substantially directly above the rear center seat.