JPH0214525Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reinforcement structure for a rear seat belt anchor, and more specifically, the present invention relates to a reinforcement structure for a rear seat belt anchor. In a rear floor structure of an automobile in which the front part of a tire well for an auxiliary tire, which is integrally formed by recessing the floor, is opened, a seat belt anchor reinforcement to which a seat belt anchor is fixed is attached to the open part of the front part of the tire well. This invention relates to a structure in which a huge load applied to a seat belt is supported by the vertical walls of the tire well via the seat belt anchors by welding along the back surfaces of the vertical walls on both sides of the tire well.

As shown in the drawings of the present application, the floor panel has a rear seat floor and a loading platform floor that rises one step rearward are integrally connected by an inclined part, and the loading platform floor is arranged in an approximately circular shape. By partially opening the upper part of the front wall of the tire well for the auxiliary tire, which is formed by recessing the tire well, into the inclined part, it becomes easier to draw the front part of the tire well, and the mechanical strength of this part is strengthened. A structure for the rear floor portion of an automobile that allows the length to be shortened has already been proposed, for example, in Japanese Utility Model Application Publication No. 57-20364.

By the way, in a car having a rear floor section with the above structure, the seat belt anchor is attached near the front open part of the tire well, but the attachment part of the conventional rear seat belt anchor is as shown in Fig. 1. As shown in , the cross member whose both ends are welded to the left and right side members is welded to the back surface of the floor panel so that it passes through the rear part of the rear seat mounting floor of the floor panel, that is, near the open part of the tire well. This increases the rigidity of this part of the floor panel, and the anchor nut is welded to the back surface of the floor panel via a suitable reinforcement material.

However, in the above configuration, it is impossible to avoid an increase in the manufacturing cost due to an increase in the cross member vehicle weight and an increase in the number of man-hours for welding the cross member.

This invention was devised in view of the above circumstances, and the structure of the rear floor is based on the premise that:
We focused on the fact that in a structure where the tire well is integrally formed by recessing the loading platform floor, its rigidity and strength increase due to the plastic work hardening of the floor and the increase in the section modulus due to floor deformation. The purpose is to make good use of the increased strength of the rear floor to support the load from the seatbelt, and to omit the cross member in the conventional example above to reduce costs and reduce the weight of the vehicle. do.

In order to achieve this purpose, in this invention,
The following technical measures have been taken:

In other words, the reinforcing structure of the rear seat belt anchor of the present invention is such that the rear seat mounting floor in the floor panel and the loading platform floor that rises one step rearward are integrally connected by an inclined portion, and the loading platform floor is connected to the loading platform floor. , in a rear floor structure including a tire well for an auxiliary tire formed by recessing a part of the tire well into a substantially circular shape, by recessing the boundary between the front wall of the tire well and the inclined part to have a concave shape when viewed from the front; While forming the front open part of the tire well, a reinforcement is provided on the back side of the front open part, a seat belt anchor is attached to this reinforcement, and the reinforcement is attached to the vertical walls on both sides of the tire well and the bottom plate of the tire well. The tire well extends along the bottom plate of the tire well, and these extensions are welded to the vertical wall and bottom plate of the tire well, respectively.

As a result, in the event of a collision or the like, the enormous load transmitted from the seatbelt to the seatbelt anchor is ultimately supported mainly by the vertical walls on both sides of the tire well via the reinforcement. As explained earlier, the tire well, especially the vertical wall of the tire well, is integrally formed by plastically deforming the floor panel, so it has inherent strength and rigidity, so it cannot be easily removed from the seatbelt. The strength of the part that should support the load is sufficient. Moreover, the direction of the load is not perpendicular to the vertical wall or the bottom of the tire well, but is applied in the plane direction, so from this perspective, the reinforcing structure of the seat belt anchor of the present invention reduces the load from the seat belt. This is advantageous in terms of strength compared to the conventional structure in which the load is applied almost perpendicularly to the floor panel.
For this reason, the present invention can omit the cross member in the conventional example, and therefore can reduce the vehicle weight and manufacturing cost.

Embodiments of the present invention will be specifically described below with reference to the drawings.

As shown in FIGS. 2 and 3, the floor panel 1 consists of a floor surface 2 on which the feet of a passenger seated in a rear seat (not shown) are located, a rear seat floor 3 which is raised in the rear of the floor surface 2, and a rear seat floor 3 which is raised in the rear of this surface. It is formed by being connected to a loading platform floor 4 whose rear part is stepped up. Also, as clearly shown in Figure 3,
The rear seat floor 3 and the cargo platform floor 4 are connected by an inclined portion 5 that extends diagonally rearward and upward.

A tire well 6 in which an auxiliary tire can be accommodated is formed in the loading platform floor 4 by recessing it into a substantially circular shape. However, this tire well 6 is provided slightly further forward than usual, and the fourth
As clearly shown in the figure, the front edge 7 thereof is arranged to rest on the inclined part 5. The front wall of the tire well 6 is recessed in a front view to form an open portion 8 that opens toward the rear seat floor 3. However, the bottom plate of the tire well 6 is made to be slightly lower than the rear seat floor 3, and the step wall 9
should restrict the front part of the tire (not shown) housed in the tire well 6 to prevent the tire from jumping out of the opening and hitting the rear seat in an emergency. Note that at least the rear seat floor 3 and the cargo bed floor 4 having the tire wells 6 are usually formed by pressing a single plate.
They may be formed separately and then joined by welding.

A reinforcement 11 to which a seat belt anchor nut 10 is welded and fixed is welded to the back surface of the open portion 8. As is clear from the drawings, this reinforcement 11 has extension pieces 13 that are curved and extend a certain length from the bottom surface of the open portion 8 along the left and right vertical walls 12 of the tire well 6. Ori,
These extension pieces 13... are respectively connected to the vertical walls 12...
It is welded on the back side of the Furthermore, the extension piece 1
3, a flange 14 bent along the sloped part 5 of the floor panel and a flange 15 bent along the bottom plate of the tire well 6 are formed, and these are welded to the sloped part and the bottom plate, respectively. . Thereby, the range in which the load from the seat belt is supported can be expanded, and the rigidity of the reinforcement 11 itself can be further increased. Further, as shown in FIGS. 2 and 3, the part of the reinforcement 11 located on the back side of the front step wall 9 of the tire well 6 is slightly separated from the step wall 9, and the closed cross-section structure part 16 It is preferable to form this because it further increases the rigidity of the floor panel in the vicinity of the seat belt anchor attachment portion.

The seat belt is fixed to a seat belt anchor nut fixed to the back surface of the reinforcement 11 via a bolt or the like.

In the above configuration, for example, when a strong force is applied to the seatbelt in the event of a collision, the force is applied to the left and right vertical walls 12 of the tire well 6 and the bottom plate through the reinforcement 11. It is accepted in a wide range of areas. This tire well 6 is integrally formed by press molding.
Since it has sufficient strength and rigidity, it can sufficiently support the load from the seat belt in the above case. Moreover, in an emergency, the load that is applied forward through the seat belt or seat belt anchor to the extended parts of the reinforcement that extend to the left and right vertical walls and bottom plate of the tire well is transferred to the extended parts of the tire well. It does not act to peel it off at right angles from the tire well, but acts in a direction along the back surface of the tire well. This load acts on the overlapping weld between the reinforcement and the tire well as a shearing force in the direction of the member surface, thereby further improving the fixing strength of the reinforcement to the tire well against the load. In general, spot welds are extremely resistant to forces that tend to displace the welded plates in the direction in which the surfaces of the plates extend. Therefore, in the reinforcing structure for the seat belt anchor attachment portion of the present invention, there is no need for a conventional cross member, and the manufacturing cost and vehicle weight can thereby be significantly reduced compared to the conventional method.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional perspective view showing a conventional example, Fig. 2 is a cross-sectional perspective view showing an embodiment of the present invention, Fig. 3 is a vertical cross-sectional view thereof, and Fig. 4 is a plan view thereof. . 1... Floor panel, 3... Rear seat placement floor, 4... Cargo platform floor, 5... Inclined part, 6...
Tire well, 8...opening part, 10...seat belt anchor (nut), 11...reinhose,
12... Vertical wall.

Claims (1)

[Scope of Claim for Utility Model Registration] The rear seat mounting floor in the floor panel and the loading platform floor that rises one step rearward are integrally connected by an inclined part, and a portion of the loading platform floor is In a rear floor structure including a tire well for an auxiliary tire that is recessed into a substantially circular shape, the boundary between the front wall of the tire well and the sloped portion is recessed in a concave shape when viewed from the front, so that the front part of the tire well is recessed. While forming an open part, a reinforcement is provided on the back side of the front open part, a seat belt anchor is attached to this reinforcement, and the reinforcement is placed along the vertical walls on both sides of the tire well and the back of the bottom plate of the tire well. A reinforcing structure for a rear seat belt anchor, characterized in that these extensions are welded to the vertical wall and bottom plate of a tire well, respectively.