JPS642550B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION -Technical Field of the Invention- The present invention relates to an automobile body structure, and particularly to a seat belt anchor attachment structure.

-Prior art- Conventionally, an automobile front seal A shown in Fig. 1
Seat belt anchors a and b are shown in Figures 2 and 3.
It is fixed to the floor panel 1 with the structure shown in the figure. That is, FIGS. 2 and 3 are a plan view and a cross-sectional view of the mounting portions of seat belt anchors a and b, and the lower surface of the floor panel 1 has an inverted "U" shape along the inner surface of the tunnel portion 1a. A main reinforcement 2 in the width direction is arranged, and seat belt anchors a and b are fixed to the floor panel 1 by bolts 3 passing through both ends of the main reinforcement 2 (for example, the Publication No.).

However, according to such a seatbelt anchor attachment structure, when an external force in the direction of arrow F is applied to the seatbelt anchors a and b in the case of a collision, etc., if the bending rigidity of the tunnel part is not sufficient, the tunnel part 1a However, as shown by exaggerated imaginary lines in FIGS. 1 and 3, there is a possibility that waving in the length direction or collapse of the cross section may occur.

-Object of the Invention- In view of the above-mentioned problems with the strength of the conventional seat belt anchor attachment part, the present invention aims to prevent the tunnel part of the floor panel from being locally deformed even when an external force is applied to the seat belt anchor. The purpose is to obtain a structure that does not require

-Structure of the Invention- In order to achieve this object, the present invention prevents the expansion of the tunnel portion by using a sub-reinforce that short-circuits both ends of the main reinforcement. This is intended to prevent waviness in the longitudinal direction of the tunnel section rather than the extension section.

-Example- Hereinafter, details of an example of the present invention will be explained with reference to FIGS. 4 and 5.

In FIGS. 4 and 5 showing the embodiment of the present invention, the same reference numerals are given to the same structural parts as in FIGS. 2 and 3 of the conventional example. The illustrated embodiment is characterized by a plate-shaped sub-reinforcement 4 in the vehicle width direction that is fixed to the main reinforcement 2 with both ends of the main reinforcement 2 short-circuited. and prevents the main reinforcement 2 from being crushed and deformed. That is,
Since both ends of the sub-reinforcement 4 are firmly fixed to positions near both ends of the main reinforcement 2 via bolts 5, 5, the external force applied to the seatbelt anchors a and b causes the tunnel portion 1a to
When both ends of the main reinforcement 2 try to move in the left-right direction in FIG. 5, a tensile load acts on the sub-reinforcement 4.
A and the main reinforcement 2 are prevented from being crushed and deformed.

The illustrated embodiment is also characterized by an extension portion 2a extending forward from the center of the main reinforcement 2 disposed in the tunnel portion 1a. The attachment of the extension part 2a not only increases the bending rigidity of the main reinforcement 2, but also increases the bending rigidity of the main reinforcement 2.
Since a is jointly fastened to the tunnel portion 1a together with the mounting bracket 7 of the handbrake 6 installed on the tunnel portion 1a, the bending rigidity of the tunnel portion 1a in the longitudinal direction is increased. Therefore, due to the external force acting on the seat belt anchors a and b, the floor panel 1
Since the tunnel portion 1a no longer waves in the longitudinal direction, the external force can be reliably transmitted to the entire vehicle body. In the illustrated embodiment, the extension part 2a is provided in a flat plate shape along the top of the tunnel part, but it is possible to increase the rigidity by flange-up both sides of the extension part 2a or by making the flange-up part run along the side wall of the tunnel part. Needless to say.

In addition, since the illustrated example is for a FF vehicle, a straight sub-reinforce is shown as an example, but when a propeller shaft passes through a tunnel section, a "V"
It may be formed into a letter shape or a "U" shape.

-Effects of the Invention- As is clear from the above description, according to the present invention, bending deformation of the tunnel portion when an external force is applied can be prevented, so the external force acting on the seat belt anchor can be reliably dispersed throughout the vehicle body. The occupant can be restrained more reliably.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the interior of a conventional automobile, Fig. 2 is a plan view of the floor panel of the same automobile, Fig. 3 is a sectional view taken along the - line of Fig. 2, and Fig. 4 is a sectional view of the automobile according to the present invention. The plan view of the floor panel, FIG. 5, is a sectional view taken along the - line in FIG. 4. a, b...Seat belt anchor, 1...Floor panel, 1a...Tunnel part (of the floor panel), 2...Main reinforcement, 2a...Extension part (of the main reinforcement), 4... Sub-reinforce, 6...Handbrake.

Claims (1)

[Claims] 1 Seatbelt anchors that place an inverted "U"-shaped main reinforcement in the vehicle width direction along the inner surface of the floor tunnel section under the floor panel, and fix seatbelt anchors to both ends of the main reinforcement. In the attachment structure, a sub-reinforce that short-circuits both ends of the main reinforcement is fixed under the main reinforcement, and a central part of the main reinforcement inside the tunnel is extended forward to the extension part. A seatbelt anchor attachment structure characterized by attaching a handbrake.