JPH0299471A - Rear car body structure for vehicle - Google Patents

Abstract

PURPOSE:To cause a rear car body to deform downward during collision at a rear part and to prevent the occurrence of a trouble on opening and closing of a door by a method wherein, in rear car body structure of an automobile, e.g., van type, a plurality of bent parts are formed on a frame part in a longitudinal closed cross section. CONSTITUTION:In a vehicle, for example, an automobile, e.g., a van type, a frame part 4 in a longitudinal closed cross section is disposed to a car body rear side plate 2 positioned rearwardly of a door opening part 1. In this case, a plurality of bent parts 6-8 longitudinally offset and positioned vertically facing each other are formed in the frame part 4 in positions rearwardly of a sustower 5. When an impact is exerted on the rear part of a car body during collision, along with collapse of a car body rear side plate 2 from the rear, the frame part 4 is gradually collapsed in a manner that the bent parts 6-8 close a triangle. This constitution relieves collision, prevents forward movement of the frame part 4, and prevents propagation of an impact to the vicinity of a door opening part 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of the rear body of a vehicle, and more particularly to the structure of the rear side plate of the vehicle body behind the door of a pan-type or wagon-type vehicle.

[Conventional technology]

Conventionally, the quarter panel in the rear body structure of a passenger car has often been formed from a single plate, but in pan-type and wagon-type cars, the quarter panel extends relatively long from the door opening to the rear, so it is difficult to maintain rigidity. Due to the need for improvement, a quarter panel is often provided with a frame portion having a closed section extending longitudinally. For example, Japanese Utility Model Publication No. Sho 61-13402 describes a panel structure having such a closed cross section. In this type of structure, the quarter panel consists of two panels: an upper panel above the middle height of the vehicle, and a lower panel below the same height, and the lower end of the upper panel and the upper end of the lower panel are They are overlapped and welded to form a substantially rectangular longitudinally closed cross section.

[Problem to be solved by the invention]

By the way, in a rear vehicle body structure having a quarter panel formed with high rigidity by a longitudinal closed cross section as described above, in the event of a rear collision, the rear fender panel in the portion where the longitudinal closed cross section is provided will move forward. There is a risk that it may deform and move and cover the door, causing problems in opening and closing the door. That is,
This is because the lower portion of the vehicle body is prevented from deforming forward by the highly rigid suspension tower, so it is unlikely that the rear fender panel will cover the door, but the portion where the longitudinal closed cross section is provided is There is no member installed to prevent deformation, and the longitudinal closed section tends to move as it is with the entire front and back tensioned, making it easy for the collision load to propagate to the vicinity of the door opening. It's for a reason.

The present invention has been made in consideration of the above circumstances, and is designed to prevent the rear fender panel from covering the door and prevent the rear fender panel from interfering with the opening and closing of the door. The challenge is to

[Means to solve the problem]

The present invention is directed to a rear body structure of a vehicle in which a frame portion forming a vertical closed section is provided on a side plate of the vehicle body located behind a door opening in the side portion of the vehicle body, and in order to solve the problem described in iii. , the frame portion is formed with bent portions that are offset in the front-rear direction and are vertically opposed to each other.

[For production]

The collision load from the rear at the time of writing is relaxed and absorbed by the bent part formed in the frame part, and since the bent part is arranged offset in the front and rear direction facing below -L, the frame part , it becomes easier to bend in the vertical direction at the bent portion. Therefore, it is possible to prevent the frame portion from moving forward in a state where the entire frame portion is stretched in the front-rear direction, and it is possible to prevent the collision load from being propagated to the vicinity of the door opening portion 1]. Furthermore, for example, by arranging and forming the bending portion so that the frame portion is easily bent downward at a position rearward of the suspension tower, the entire rear vehicle body can be deformed downward during rearward movement.

Then, the highly rigid suspension tower prevents the rear vehicle body from deforming forward, effectively suppressing the propagation of the collision load until it reaches the vicinity of the door opening.
It is possible to reliably prevent the rear fender panel from covering the door.

〔Effect of the invention〕

According to the rear body structure of the vehicle of the present invention, as described above, the rear body can be adjusted to deform downward in the rear view, so that opening and closing of the door is not hindered. Can be done.

〔Example〕

The present invention will be explained in detail below based on examples.

The rear body structure of the vehicle shown in this embodiment is applied to a pan-type vehicle in which the body side plate behind the door is formed relatively long. It allows you to adjust the deformation of the car body,
It is composed as follows.

Figure 1 shows a perspective view of the right side of the vehicle body viewed from the outside of the vehicle.
A frame portion 4 forming a vertical closed section 3 (see FIGS. 2(c) to 2(C)) is provided on the holder. The frame part 4
The bent portions 6.7. are arranged at a position rearward of the suspension tower 5, offset in the front and back, and facing each other vertically.
8 is formed.

To explain in detail, the rear side plate 2 of the vehicle body is called a quarter panel, and includes a lower quarter panel 10 below the rear side window opening 9 and an upper quarter panel 11 above the rear side window opening 9. The edges are overlapped and welded together. As shown in FIG. 2(C), the overlapping portion is a frame portion 4 forming a longitudinal closed cross section 3 with a substantially rectangular cross section, which improves the longitudinal strength and rigidity of the quarter panel 2. It is planned.

The door opening edge 13 in the quarter panel upper 11 is
A rear villa having a vertical closed section 14 as shown in FIG. 2(a) is formed between the rear fender panel 15 and the rear fender panel 15. A cross section of the intersection of the rear villa and the frame portion 4 is shown in FIG. 2(b).

A rear wheel house outer 12 and a suspension tower 5 are provided at the lower part of the quarter panel lower IO, and the frame portion 4 of the quarter panel lower 10 at the rear upper blade of the suspension tower 5 has a structure shown in FIG. 2(d). As shown, a bent portion 6 is bent inward in a triangular shape of the vertical closed section 3.
is formed, and the impact at the time of post-texture is alleviated at this portion, and the frame portion 4 rearward from that portion is easily bent downward. This is because the suspension tower 5 has a highly rigid structure, so the quarter panel lower 10 in the area surrounded by the suspension tower 5, the door opening edge 13, and the rear wheel house outer 12 has high rigidity against rear collision loads. This is because the quarter panel lower 10 located behind the suspension tower 5, which has relatively low rigidity, is deformed downward in order to obtain a collapse mode as described below.

The frame portion 4 of the quarter panel upper 11 at a position slightly rearward of the bent portion 6 is provided with a portion shown in FIG.
As shown in e), a triangular bent portion 7.8 is formed inward of the longitudinal closed section 3. These two bent portions 7 and 8 not only reduce the impact of the backing, but also make it easier for the frame portion 4 to bend downward in a convex manner at these portions.
Coupled with the action of the bent portion 6, this is provided to obtain a collapse mode as described later.

A roof panel 16 (see FIG. 3) is joined to the upper part of the rear fender panel 15. Incidentally, the bent portion 7.8 formed at the upper part of the frame portion 4 is covered with a trim (not shown), so that the appearance is not spoiled.

In the rear body structure of the vehicle configured as described above, the deformation can be adjusted to the immersion mode 17 as shown by the dashed line in FIG. That is, the quarter panel 2 is crushed from the rear due to the collision load from the rear of the vehicle body, but each bent part 8, 7, and 6 of the frame part 4 is crushed one after another so as to close a triangle, and the impact is alleviated. In addition, by bending the rear part of the frame part 4 downward at different levels, the frame part 4 is prevented from moving forward while being stretched in the front-rear direction as a whole, and the collision load is transferred to the door opening l. Propagation to nearby areas can be effectively suppressed. In addition, since the entire rear part of the vehicle body is bent downward, the collision load is concentrated on the lower part of the vehicle body, but this is effectively blocked by the highly rigid suspension tower 5, preventing the rear part of the vehicle body from deforming and moving forward. . For this reason, the collision load can be more effectively alleviated and suppressed up to the vicinity of the door opening 1, and the fender panel 15 can be prevented from covering the door in the area where the frame portion 4 is provided. This prevents the occurrence of situations that would hinder the opening and closing of the door.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a perspective view of the rear side plate of the rear body structure of a vehicle according to the present invention, and FIGS. 2(a) to (e) are A-A in FIG.
BB, CC, DD, and EE line arrow sectional views, and FIG. 3 are schematic diagrams showing the soaking mode at the time of postscript. 1--Door opening, 2--Vehicle rear side plate (quarter panel), 3--Longitudinal closed section, 4--Frame part, 6
゜7.8-m-bending part. Patent applicant Mazda Co., Ltd. Agent Patent attorney Katsutoshi Yoshiso (and one other person) Figure (a) Figure (b) Figure (d) Figure (e)

Claims (1)

[Claims] (1) In a rear body structure of a vehicle in which a frame portion forming a longitudinal closed cross section is provided on the rear side plate of the vehicle body located behind the door opening in the side portion of the vehicle body, the frame portion has an offset in the longitudinal direction. A rear body structure for a vehicle, characterized in that a bent portion is formed to face each other vertically.