Vehicle seat belt system

Abstract

It uses a simple configuration to suppress the reduction of the EAP distance during collisions. [Solution] The seat belt device 100 comprises a seat belt anchorage 20 and a bracket 40. The seat belt anchorage 20 is a plate-shaped member with fastening portions 21 and connecting portions 22 arranged side by side in the longitudinal direction, and the bracket 40 is a longitudinal member with a hat-shaped cross section, fixed to the floor 10 so as to extend in a direction intersecting the longitudinal direction of the seat belt anchorage 20, and includes an end flange 45 that the side surface 22A of the connecting portion 22 abuts against when the seat belt anchorage 20 rotates.

Description

Technical Field

[0001] The present disclosure relates to the structure of a vehicle seat belt device including a seat belt anchor.

Background Art

[0002] Patent Document 1 describes a structure in which the rigidity of the floor at the portion where the seat belt anchor is fastened is improved by using a fuel tank to suppress the movement of the seat belt anchor due to the deformation of the floor during a collision.

[0003] Patent Document 2 relates to a seat belt device in which a center seat belt anchor and a side seat belt anchor are jointly fastened to the floor, and a structure is disclosed in which a stopper is provided on one of the anchors to prevent the rotation of the other anchor.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, even when a load is applied to the seat belt during a collision, it is required that the pitch (EAP (Effective Anchor Point) distance) of the belt anchor points of the seat belt anchor on the vehicle center side and the seat belt anchor on the vehicle outer side does not fall below a predetermined interval.

[0006] The conventional technology described in Patent Document 1 improves the rigidity of the vehicle body floor by using the fuel tank to reduce floor deformation during a collision, but this has the problem of making the structure complex. In addition, in the conventional technology described in Patent Document 2, when the anchorage equipped with a stopper rotates due to the load during a collision, other anchorages may also rotate together, which can increase the EAP distance.

[0007] Therefore, this disclosure aims to suppress the shortening of the EAP distance during a collision with a simple configuration. [Means for solving the problem]

[0008] The vehicle seat belt device of the present disclosure comprises a seat belt anchorage fastened to the floor and a bracket attached to the floor at a position adjacent to the seat belt anchorage, wherein the seat belt anchorage is a plate-shaped member having a fastening portion fastened to the floor and a connecting portion to which a seat belt is connected arranged in the longitudinal direction, and the bracket is a longitudinal member with a hat-shaped cross section, fixed to the floor so as to extend along the surface of the floor in a direction intersecting the longitudinal direction of the seat belt anchorage, and is provided with an end flange to which the side surface of the connecting portion abuts when the seat belt anchorage rotates.

[0009] This suppresses the rotation of the seatbelt anchorage due to the load during a collision, thereby preventing a reduction in the EAP distance. [Effects of the Invention]

[0010] This disclosure provides a simple configuration that can suppress the reduction of the EAP distance during a collision. [Brief explanation of the drawing]

[0011] [Figure 1] This is a plan view of a vehicle equipped with the seat belt device of the embodiment. [Figure 2] This is a perspective view of the seat belt device of an embodiment. [Modes for carrying out the invention]

[0012] The vehicle seat belt device 100 (hereinafter referred to as "seat belt device 100") of the embodiment will be described below with reference to the drawings. FR, UP, and RH in each figure indicate the front, upper, and right sides of the vehicle 200 to which the seat belt device 100 is installed, respectively. The opposite directions of FR, UP, and RH indicate the rear, lower, and left sides, respectively. Hereafter, when simply using the directions front / back, left / right, and up / down, unless otherwise specified, these refer to the front / back, left / right, and up / down directions of the vehicle 200.

[0013] In the rear seats of the vehicle 200, which can accommodate three people seated side-by-side in the width direction of the vehicle, a right-side seat belt device for the right seat, a center seat belt device for the middle seat, and a left-side seat belt device for the left seat are installed. The seat belt device 100 shown in Figure 1 is the right-side seat belt device for the right seat.

[0014] As shown in Figure 1, the seat belt device 100 includes a seat belt anchorage 20, a side seat belt anchorage 30, and a bracket 40.

[0015] The seat belt anchorage 20 is located in the center of the vehicle width direction. The seat belt anchorage 20 is a plate-shaped member with a fastening portion 21 and a connecting portion 22 arranged side by side in the longitudinal direction. The fastening portion 21 is fastened to the floor 10 of the vehicle 200 by bolts 29. The connecting portion 22 is provided with an elongated hole 23 to which a seat belt (not shown) is connected. The side seat belt anchorage 30 is located on the right side of the vehicle 200. The side seat belt anchorage 30 has a similar structure to the seat belt anchorage 20, and is a plate-shaped member with a fastening portion 31 and a connecting portion 32 arranged side by side in the longitudinal direction, and is fastened to the floor 10 by bolts 39. The connecting portion 32 is provided with an elongated hole 33.

[0016] The distance in the vehicle width direction between the center of the elongated hole 23 of the connecting portion 22 of the seat belt anchorage 20 and the center of the elongated hole 33 of the connecting portion 32 of the side seat belt anchorage 30 is the EAP (Effective Anchor Point) distance.

[0017] Bracket 40 is mounted to the floor 10 adjacent to the right side of the seat belt anchorage 20. As shown in Figure 2, bracket 40 is a longitudinal member with a hat-shaped cross section, including a web 41, a flange 42, and an arm 43. Bracket 40 is fixed to the floor 10 by spot welds 49 so as to extend along the surface of the floor 10 in a direction intersecting the longitudinal direction of the seat belt anchorage 20. The end of bracket 40 facing the seat belt anchorage 20 is provided with a plate-shaped end flange 45 extending upward from the arm 43.

[0018] When vehicle 200 is involved in a frontal collision, an impact force is applied to the seat belt anchorage 20 from the seat belt connected to the elongated hole 23 of the connecting portion 22, directed towards the front right of the vehicle, as shown by arrow 91 in Figure 2. Due to this impact force, the seat belt anchorage 20 attempts to rotate around the bolt 29, as shown by the white arrow 92 in Figure 2. However, as the seat belt anchorage 20 rotates, the side surface 22A of the connecting portion 22 comes into contact with the end flange 45 of the bracket 40. This prevents the EAP distance from narrowing.

[0019] Thus, the seat belt device 100, with its simple configuration, can suppress the rotation of the seat belt anchorage 20 when the vehicle 200 is involved in a frontal collision, thereby preventing a reduction in the EAP distance.

[0020] Furthermore, the bracket 40 is a longitudinal member with a hat-shaped cross-section and is fixed to the floor 10 so as to extend in a direction intersecting the longitudinal direction of the seat belt anchorage 20. Therefore, even if a large force is applied to the seat belt anchorage 20 during a collision, rotation of the seat belt anchorage 20 can be suppressed, and the reduction in the EAP distance can be prevented.

[0021] The seat belt device 100 for the right seat has been described above. However, the configuration of the left side seat belt device for the left side may be symmetric with the seat belt device 100 about the left and right.

Explanation of Signs

[0022] 10 Floor, 20 Seat belt anchorage, 21, 31 Fastening part, 22, 32 Connecting part, 22A Side surface, 23, 33 Long hole, 29, 39 Bolt, 30 Side seat belt anchorage, 40 Bracket, 41 Web, 42 Flange, 43 Arm, 45 End flange, 49 Spot welding, 100 Seat belt device (seat belt device for vehicle), 200 Vehicle.

Claims

[Claim 1] A vehicle seat belt device, Seat belt anchorages fastened to the floor, The system includes a bracket that is attached to the floor at a position adjacent to the seat belt anchorage, The seat belt anchorage is a plate-shaped member in which a fastening portion fastened to the floor and a connecting portion to which the seat belt is connected are arranged in a longitudinal direction. The bracket is a longitudinal member with a hat-shaped cross-section, fixed to the floor so as to extend along the surface of the floor in a direction intersecting the longitudinal direction of the seat belt anchorage, and is provided with an end flange against which the side surface of the connecting portion abuts when the seat belt anchorage rotates. A vehicle seat belt device characterized by the following.

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