JP4248295B2 - Seat belt device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seat belt device.
[0002]
[Prior art]
Conventionally, in a three-seat bench seat in a front seat of a pickup truck, a rear seat of a sedan, etc., a two-point seat belt device with only a lap belt passed to the waist has been generally adopted for the center seat. However, from the viewpoint of ensuring higher safety, a shoulder belt that extends diagonally from the shoulder of the person over the chest and a lap belt that is passed to the waist are fixed and used in one place. Application of a belt device is under consideration.
[0003]
That is, in the three-point seat belt apparatus, when the webbing is pulled out from the retractor by grasping the tongue, and the tongue is fitted to the buckle, the webbing extending obliquely upward from the tongue forms a shoulder belt, and the lateral direction from the tongue. The extending webbing forms a lap belt.
[0004]
As prior art document information related to this type of three-point seat belt device, there is, for example, the following Patent Document 1.
[0005]
[Patent Document 1]
JP 2002-541008 A [0006]
[Problems to be solved by the invention]
However, in the left and right seats of the bench seat, the retractor is accommodated in the pillar on the vehicle body side and the webbing is pulled out. However, in the center seat away from the pillar, the retractor must be built in the seat back or the like. As a result, the seat frame, the seat back lock, and the like have to be significantly reinforced, resulting in a significant increase in mass and cost.
[0007]
The present invention has been made in view of the above circumstances, and an object thereof is to realize application of a three-point seat belt device to a center seat of a three-seat bench seat without causing an increase in mass or cost. Yes.
[0008]
[Means for Solving the Problems]
The present invention relates to a three-point seat belt device applied to a center seat of a three-seat bench seat, wherein a retractor for winding a webbing is provided at a position directly below a rear surface side of a seat back via a bracket having an L-shaped cross section. vehicle is attached by fastening from the front of the vehicle by bolts and nuts, the webbing pulled out to directly upward from said retractor to the upper reinforcement of the back panel shoulder anchor to fold on the front side of the seat back in the vicinity of the shoulder of the center seat It is characterized by being fastened with bolts and nuts from the front .
[0009]
Thus, in this way, when an impact load is applied to the vehicle and the occupant in the center seat receives a reaction force, the shoulder anchor and the retractor are restrained via the webbing that restrains the occupant to the center seat. Even if a load is input, the load input to the shoulder anchor is shared by the back panel reinforcement, and the load input to the retractor is shared by the floor reinforcement so that the load acts on the bench seat side. Instead, the load is handled only on the vehicle body side.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0011]
FIG. 1 and FIG. 2 show an example of an embodiment for carrying out the present invention, in which 1 indicates a center seat of a three-seat bench seat 2 (see FIG. 2). A retractor 4 that winds up the webbing 3 is attached to the floor reinforcement 6 at a lower position on the rear side of the seat back 5 and the webbing 3 drawn upward from the retractor 4 is near the shoulder of the center seat 1. The shoulder anchor 7 that is folded back to the front side of the seat back 5 is attached to the appli- force reinforcement 9 of the back panel 8 so that a three-point seat belt device is applied.
[0012]
More specifically, as shown in FIG. 1, the flange portion extending downward from the casing of the retractor 4 and one end portion of the bracket 10 having an L-shaped cross section are fastened by a bolt 11 and a nut 12. The other end portion of the steel plate and the upper end portion of the U-shaped cross-section reinforcing plate 13 spot welded to the inside of the floor reinforcement 6 are fastened with bolts 15 and nuts 16 in a three-layered manner with the floor pan 14 interposed therebetween. Like to do.
[0013]
Here, the rear end portion of the floor reinforcement 6 is spot-welded in three layers together with the rear end portion of the floor pan 14 and the lower end portion of the back panel 8, and the front end portion of the floor reinforcement 6 is bolted. In the vicinity of the fastening position by 15 and the nut 16, spot welding is performed on the floor pan 14 in a two-ply manner.
[0014]
Further, the shoulder anchor 7 is formed in a rectangular frame shape when viewed from the front by a rod member having a circular cross section, and the lower portion is held by the holder 17. 9 and the reinforcing plate 18 having a U-shaped cross section are fastened by bolts 19 and nuts 20.
[0015]
Then, as shown in FIG. 2, a connector tongue 21 at the tip of the webbing 3 that has been pulled out from the retractor 4 and then turned back to the front side of the seat back 5 through the shoulder anchor 7 is attached to the floor side and attached to the right seat side. It is fixed to the connector buckle 23 exposed from the sheet notch 22.
[0016]
On the other hand, a buckle 25 attached to the floor side is exposed in the seat notch 24 on the right seat side, and a tongue 26 slidably provided in the middle of the webbing 3 along the front surface of the seat back 5. When used, it is adapted to be attached to the buckle 25 (see the two-dot chain line in FIG. 2).
[0017]
In the figure, 27 indicates a seat cushion of the center seat 1 and 28 indicates a lower reinforcement of the back panel 8.
[0018]
Thus, when the passenger sits on the center seat 1 after this, the webbing 3 is pulled out from the retractor 4 by grasping the tongue 26, and the tongue 26 is fitted and attached to the buckle 25. The webbing 3 extending upward forms a shoulder belt, and the webbing 3 extending laterally from the tongue 26 forms a lap belt, and the passenger is restrained by the center seat 1.
[0019]
When an impact load is applied to the vehicle and the occupant of the center seat 1 receives a reaction force, the load is input to the shoulder anchor 7 and the retractor 4 via the webbing 3 that restrains the occupant to the center seat 1. In this case, the load input to the shoulder anchor 7 is shared by the upper reinforcement 9 of the back panel 8, the load input to the retractor 4 is shared by the floor reinforcement 6, and the load is applied to the bench seat 2 side. The load is received only on the vehicle body side without acting.
[0020]
Therefore, according to the above-described embodiment, the load can be handled only on the vehicle body side without applying a load to the bench seat 2 side, and the existing high-strength portions such as the upper reinforcement 9 and the floor reinforcement 6 of the back panel 8 can be used. Since it is not necessary to add a new reinforcement on the vehicle body side, the three-point seat belt device can be applied to the center seat 1 without causing an increase in mass or cost.
[0021]
Note that the seat belt device of the present invention is not limited to the above-described embodiment, and the attachment type of the retractor to the floor reinforcement and the fixation type of the shoulder anchor to the back panel reinforcement are not necessarily illustrated. Of course, the present invention is not limited to the examples, and various modifications can be made without departing from the scope of the present invention.
[0022]
【The invention's effect】
According to the above-described seat belt device of the present invention, it is possible to handle the load only on the vehicle body side without applying a load to the bench seat side, and the existing high-strength portions of the back panel called up reinforcement and floor reinforcement can be used. By using it, it is not necessary to add a new reinforcement on the vehicle body side, so it is possible to realize the application of a three-point seat belt device to the center seat of a three-seat bench seat without causing an increase in mass or cost. An excellent effect can be achieved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of an embodiment of the present invention.
FIG. 2 is an overall perspective view of a bench seat provided with the center seat of FIG.
[Explanation of symbols]
1 Center seat 2 Bench seat 3 Webbing 4 Retractor 5 Seat back 6 Floor reinforcement 7 Shoulder anchor 8 Back panel 9 Appli reinforcement
10 bracket
11 volts
12 nuts
19 volts
20 nuts

Claims (1)

A three-point seat belt device applied to the center seat of a three-seat bench seat. The retractor that winds up the webbing is placed on the floor reinforcement at the position directly below the rear side of the seat back from the front of the vehicle via an L-shaped cross-section bracket. A bolt and nut are fastened with a bolt and a nut, and a shoulder anchor that turns back a webbing pulled out from the retractor to the front side of the seat back in the vicinity of the shoulder of the center seat is attached to the rear panel of the rear panel with bolts and A seat belt device, wherein the seat belt device is attached by fastening with a nut .

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