JPH0453325Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to the lower body structure of a motor vehicle, and particularly relates to an improvement in the mounting structure for attaching a belt retractor for a rear seat belt to the vehicle body.

(Prior Art) Various types of lower body structures of this type have been known in the past. For example, in the one disclosed in Japanese Utility Model Publication No. 60-27067, the lower window frame member of the rear side window and the center pillar part are combined. A reinforcing member is provided at the joint of the pillar outer panel and the pillar inner panel, and one end of the reinforcing member is clamped and fixed between each flange portion of the pillar outer panel and the pillar inner panel within the closed cross section formed by the pillar outer panel and the pillar inner panel. The belt retractor for the seat belt is housed in an opening provided at the other end of the reinforcing member.

(Problem to be solved by the invention) In this conventional method, one reinforcing member is attached between the closed cross sections formed by the pillar outer panel and the pillar inner panel, so that the reinforcing member is reinforced. It is possible to improve the support rigidity of the connecting portion between the center pillar portion and the lower window frame portion. However, on the other hand, since the other end of the reinforcing member to which the seat belt retractor is attached is not supported anywhere on the vehicle body, its support rigidity is low, and for example, when a car crashes, the seat belt is attached to the seat belt retractor. When a large tensile load is applied through the reinforcing member, there is a problem in that the reinforcing member alone cannot provide a sufficient reinforcing effect to cope with the large tensile load.

Therefore, the purpose of the present invention is to attach a seatbelt retractor to a predetermined strong reinforcing member that reinforces the vehicle body, so that the seatbelt retractor can be Even if a tensile load is applied, the purpose is to ensure high support rigidity against the tensile load.

(Means for Solving the Problem) In order to achieve the above object, the solution taken by the invention according to claim 1 is a rear pillar inner facing a suspension tower portion at the rear of the vehicle body as a lower body structure of the vehicle. on the panel,
In addition to joining the suspension housing reinforcement, which has a bottom wall portion and has a generally hat-shaped cross section, the pillar reinforcement for reinforcing the vehicle body pillar portion and the belt line reinforcement for reinforcing the belt line portion are used. At least one of the suspension housing reinforcements is joined to the bottom wall of the suspension housing reinforcement, and the rear pillar inner panel, the suspension housing reinforcement, and at least one of the pillar reinforcement and the belt line reinforcement are connected to each other. Forms a closed cross section. Further, a seat belt retractor for a rear seat seat belt is attached to at least one of the pillar reinforcement and the belt line reinforcement while being housed in the space within the closed cross section.

(Function) With the above configuration, in the present invention, the seat belt retractor of the seat belt is attached to the rear pillar inner panel and the suspension housing reinforcement, which has a substantially hat-shaped cross section, so as to form a closed cross section with them. attached to at least one of a pillar reinforcement for reinforcing the pillar part of a highly rigid vehicle body and a belt line reinforcement for reinforcing the belt line part, which are joined to the bottom wall part of the vehicle body, and Because it is stored in a space within a closed cross section between three parties,
Of the pillar reinforcements and belt line reinforcements mentioned above, which are joined to the bottom wall part of the suspension housing reinforcement, which has the highest rigidity, and can effectively obtain high rigidity and strength from the suspension housing reinforcement. Together with the reinforcing effect of at least one of the reinforcements, high support rigidity can be obtained. Therefore, even if a large tensile load is applied to the seatbelt retractor via the seatbelt during a car crash, for example, a sufficiently high support rigidity can be ensured against the tensile load. Moreover, at least one of the pillar reinforcement and the belt line reinforcement and the suspension housing reinforcement are both strong for reinforcing the inner panel near the suspension tower, Its supporting rigidity is higher.

Furthermore, as mentioned above, the rear pillar inner panel whose rigidity can be increased by joining the suspension housing reinforcement with high rigidity, the suspension housing reinforcement, and the suspension housing reinforcement with the highest rigidity and strength. At least one of the pillar reinforcement and the belt line reinforcement, which are joined to the bottom wall, are members with high rigidity for the purpose of reinforcement, and the rigidity is increased by these members. A closed cross section with effectively increased rigidity and strength is formed by the three members each having a high rigidity.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

1 to 3 show, for example, the rear body structure of a five-door automobile having a hatchback-type rear door, 1 is a rear fender panel that constitutes the left surface of the vehicle body, and 2 is a rear fender panel of the rear fender panel 1. This rear pillar inner panel 2 is a rear pillar inner panel arranged on the inner side in the width direction.
A front rear pillar part 3, a rear rear pillar part 4, and a belt line part 5 are integrally formed in the upper part of the vehicle, and a wheel house panel 6 is integrally formed in the lower part thereof, and both the panels 1 and 2 form an internal space 7 between them. The rear window glass 8 is attached to the outer side surface of the peripheral flange 1a.

A suspension tower portion 9 is coupled and supported to the inner surface in the vehicle width direction (the upper surface in FIG. 2) of the rear pillar inner panel 2 via a coupling member 10, and a through-hole mounting hole 9a (not shown) in the upper wall is provided with a suspension tower portion 9. The upper end of the rear wheel suspension damper is fitted and fixed.
On the outer surface in the vehicle width direction of the rear pillar inner panel 2 facing the suspension tower part 9, there is provided a suspension housing rainforest having a substantially hat-shaped cross section for reinforcing the rear pillar inner panel 2 in the vicinity of the suspension tower part 9. The sment 11 has flange portions 11a on its front and rear sides,
11a to the rear pillar inner panel 2, and the lower bottom part 11b to the rear pillar inner panel 2.
The rear pillar inner panel 2 is fixedly fixed to the wheel house panel 6 of the rear pillar inner panel 2 so as to form a closed cross section 12 between the rear pillar inner panel 2 and the rear pillar inner panel 2.

Additionally, on the outside in the vehicle width direction of the rear pillar inner panel 2 corresponding to the suspension tower section 9, there is a pillar reinforcement 13 for reinforcing the front rear pillar section 3 and a pillar reinforcement 13 for reinforcing the belt line section 5. The belt line reinforcement 14 clamps and fixes the peripheral flange portions 13a and 14a between the peripheral flanges 1a and 2a of both panels 1 and 2, and the pillar reinforcement 13 has its rear edge connected to the suspension. At the front edge of the outer surface of the side wall 11c of the suspension housing reinforcement 11 (the bottom wall in terms of the cross-sectional shape of the suspension housing reinforcement 11), and at the front edge of the belt line reinforcement 14, They are respectively fixed to the rear edge of the outer surface of the side wall 11c of the seat 11 and are provided so as to form closed cross sections 15 and 16 with the rear pillar inner panel 2. Therefore, the suspension housing reinforcement 11 is fixedly supported by both the pillar reinforcement 13 and the belt line reinforcement 14.

Then, while forming the closed cross sections 15 and 16,
The pillar reinforcement 13 and belt line reinforcement 14 that reinforce the suspension tower portion 9 via the suspension housing reinforcement 11 include:
Belt retractors 19 and 20 for seat belts 17 and 18 for the rear seats, respectively, are stored in spaces 21 and 22 within the closed sections 15 and 16, with parts thereof fixed to the rear pillar inner panel 2. The seat belts 17 and 18 that are attached and wound around the seat belt retractors 19 and 20 are taken out into the vehicle interior through the openings 23 and 23 of the rear pillar inner panel 2 and the openings 25 and 25 of the trim 24. It's starting to become easier.

Therefore, in this embodiment, the pillar reinforcement 13 that reinforces the front rear pillar part 3 and the belt line reinforcement 14 that reinforces the belt line part 5 are used to strengthen the rear pillar inner panel 2 and the suspension tower part 9. Closed sections 15 and 16 are fixed to the front and rear edges of the outer surface of the side wall 11c, which has the highest rigidity and strength, of the reinforcing suspension housing reinforcement 11, respectively.
The pillar reinforcement 13 and the belt line reinforcement 14, which have effectively obtained high rigidity from the suspension housing reinforcement 11, are joined to the belt restraints of the seat belts 17 and 18 for the rear seats. Tractors 19, 20 have their closed sections 15, 1, respectively.
Moreover, these closed sections 15 and 16 are provided in the interior space 7 formed by the rear fender panel 1 and the rear pillar inner panel 2, and their support The strength is increasing. Therefore, in the event of a car collision, the seat belt 1 is placed in the belt retractors 19, 20 of the seat belts 17, 18
Even when a large tensile load is applied through the supports 7 and 18, high support rigidity can be ensured. Both reinforcements 13 and 14 to which seat belt retractors 19 and 20 are attached
is a strong material for reinforcing the inner panel near the suspension tower, and its support rigidity is higher.

Furthermore, the rear pillar inner panel 2 whose rigidity can be increased by joining the suspension housing reinforcement 11 with high rigidity as described above, the suspension housing reinforcement 11, and the most of the suspension housing reinforcement 11. Pillar reinforcements 13 or belt line reinforcements 14 are fixed to the front and rear edges of the outer surface of the side walls 11c, which have high rigidity, respectively. Closed cross sections 15 and 16 with effectively increased rigidity and strength can be formed at the front and rear of the suspension housing reinforcement 11 by using the three members that have increased rigidity and strength.

(Effects of the Invention) As described above, according to the lower vehicle body structure of the present invention, a closed cross section is formed together with the rear pillar inner panel and the suspension housing reinforcement that face the suspension tower portion at the rear of the vehicle body. The seatbelt retractor of the seatbelt is housed in the space within the closed section of at least one of the pillar reinforcement and the beltline reinforcement, which are connected to the bottom wall portion of the suspension housing reinforcement that has the highest rigidity and strength. Since the suspension housing reinforcement has effectively increased the rigidity, the reinforcement effect of at least one of the pillar reinforcement and the belt line reinforcement can provide high support rigidity. Even if a strong tensile load is applied to the seat belt retractor in the event of a car collision, the high support rigidity allows it to effectively cope with the tensile load, which is an excellent practical effect. It has the following. Furthermore, as mentioned above, the rear pillar inner panel whose rigidity can be increased by joining the suspension housing reinforcement with high rigidity, the suspension housing reinforcement, and the suspension housing reinforcement with the highest rigidity and strength. A member with high rigidity and strength for the purpose of reinforcement, consisting of at least one of a pillar reinforcement and a beltline reinforcement, which are joined to the bottom wall to increase rigidity, and these members Therefore, a closed cross section with effectively increased rigidity can be formed by the three members having increased rigidity and strength.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional view showing the reinforcing support structure of the rear pillar inner panel in the vicinity of the suspension tower; FIG. 2 is a sectional view taken along the line - - in FIG. 1; - line sectional view. 2...Rear pillar inner panel, 3...Front rear pillar part, 5...Belt line part, 9...Suspension tower part, 11...Suspension housing reinforcement, 11c...Side wall (bottom wall part), 13... Pillar reinforcement, 14... Belt line reinforcement, 15, 16... Closed section, 17, 18... Seat belt, 19, 20... Seat belt retractor, 21, 22... Space part .

Claims (1)

[Scope of utility model registration request] A suspension housing reinforcement having a bottom wall and a generally hat-shaped cross section is joined to the rear pillar inner panel facing the suspension tower at the rear of the vehicle body, and a pillar rain reinforcement for reinforcing the vehicle body pillar. At least one of the reinforcement and the belt line reinforcement for reinforcing the belt line portion is joined to the bottom wall portion of the suspension housing reinforcement, and the rear pillar inner panel, the suspension housing reinforcement, and the pillar are joined to the bottom wall portion of the suspension housing reinforcement. A closed section is formed by at least one of the reinforcement and the beltline reinforcement, and the rear seat belt is attached to at least one of the pillar reinforcement and the beltline reinforcement. A lower body structure for an automobile, characterized in that a belt retractor is housed and attached to the space within the closed section.