JP2000043757A - Pillar lower car body structure of tail gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the attaching accuracy of a side member and increase rigidity and strength in the vicinity of the rear end part of the side member without increasing the plate thickness of a rear floor corner plate in the tail gate pillar lower part of a van vehicle. SOLUTION: A closed portion 3a is provided in the end part of a cross member inner 3. A pair of side flanges 5a and 5b formed in the rear end parts of a side members 5 are welded to the outer surface of the closed portion 3a, and the shape deformation of the rear end side of the side members 5 is prevented. A rear floor corner plate 6 is provided beforehand on the pillar side. At the time of assembling a rear pillar, the rear floor corner plate 6 is welded to the inner surface of the closed portion 3a of the cross member inner 3 at the same welding points as those of the pair of side flanges 5a and 5b. Thus, rigidity and strength are secured in the vicinity of the rear end part of the side member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower vehicle body structure of a tailgate in a vehicle such as a van type.

[0002]

2. Description of the Related Art Conventionally, for example, a van type vehicle 1 shown in FIG.
The structure of the pillar lower part A of the tailgate in
The one shown in FIG. 6 is known (Japanese Utility Model Application Laid-Open No. Hei 5-6238).
No. 9).

The pillar lower portion A of the van-type vehicle 1 includes a rear end cross member 2 disposed mainly at the rear end of the vehicle body and a side member 5 disposed on a lower surface of a floor panel (not shown). And a rear floor corner plate 6 for connecting a rear pillar (not shown) to the rear end cross member 2. The rear end cross member 2 is composed of a cross member inner 3 and a cross member outer 4. A rear end of the side member 5 has a flange 5 bent to both sides in the vehicle width direction.
a, 5b are provided. Also, the cross member inner 3 sandwiches the side edge 6a of the rear floor corner plate 6 together with one flange 5b located on the vehicle body center side of both the flanges 5a and 5b of the side member 5,
In this state, it is spot-welded to the rear floor corner plate 6 together with the flange 5a. In addition,
The cross member outer 4 is provided with a working hole 7 for guiding the spot welding gun G to the cross member inner 3 at the time of the welding.

[0004]

However, in such a conventional structure, the side member 5 has only one flange 5b located on the center side of the vehicle body joined to the inner cross member 3 via the rear floor corner plate 6. When assembling the rear pillar,
The shape becomes unstable, for example, the rear end of the side member 5 tends to open sideways. For this reason, the shape of the rear end of the side member 5 is easily deformed at the time of the assembling operation on the pillar side, and it is difficult to make it the designated shape. Therefore, the mounting accuracy of the side member 5 is reduced due to the deformation of the rear end portion of the side member 5, and as a result, the rigidity of the tailgate of each vehicle body is varied.

Further, since the rear end of the side member 5 is welded only to the rear floor corner plate 6 which is not the frame member of the vehicle body, it is necessary to improve the rigidity near the rear end of the side member 5. There is also a problem that the thickness of the rear floor corner plate 6 must be increased.

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and improves the mounting accuracy of the side member and increases the thickness of the rear floor corner plate without increasing the thickness of the rear floor corner plate. It is an object of the present invention to provide a body structure below a tailgate pillar that improves rigidity.

[0007]

According to the first aspect of the present invention, there is provided a van type vehicle having a cross member formed at a tailgate of a van type vehicle at an end of a cross member inner side. In a lower pillar body structure in which a side member disposed on a vehicle and a rear floor corner plate connecting the rear pillar are connected, a closing portion for closing a rear end of the side member is provided in the cross member inner, A pair of side flanges bent at both sides in the vehicle width direction at the rear end of the side member are coupled to an outer surface on the vehicle body front side, and a corresponding inner surface on the vehicle body rear side of the closing portion corresponding thereto. To the rear floor corner plate.

In such a configuration, when assembling the tailgate, a pair of side flanges at the rear end of the side member are connected to the closing portion of the inner cross member in advance to freeze the shape of the rear end of the side member. As a result, deformation such as lateral opening at the rear end side can be prevented.

In addition, after assembly, the rear floor corner plate is joined to the closing portion of the cross member inner corresponding to the position where the rear end of the side member is joined. Has sufficient rigidity.

[0010] In the invention according to claim 2, the cross member outer forming the cross member together with the cross member inner is provided with a working hole used for connecting the cross member inner and the rear floor corner plate. On the other hand, the connection point of the rear floor corner plate in the cross member inner is made to coincide with the connection point of the pair of side flanges of the side member.

In such a configuration, the rear floor corner plate can be connected to the rear pillar in advance. Further, when the rear floor corner plate is joined to the cross member inner, the pair of side flanges at the rear end of the side member can be strongly joined at the same time.

Further, in the invention according to claim 3, a first guide flange bent toward the front side of the vehicle body is provided at an edge of the closing portion of the cross member inner, and the rear floor corner plate is provided with a first guide flange. A second guide flange bent at the rear side of the vehicle body is provided at an end corresponding to the first guide flange.

In this configuration, when the rear pillar corner plate previously connected to the rear pillar is superimposed on the closing portion of the cross member inner from the side of the vehicle body when the rear pillar is assembled, the first guide flange and the second guide flange are provided. Are in contact with each other, so that the edge of the rear floor corner plate and the edge of the closing portion are prevented from being caught.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 4 is a schematic diagram showing a horizontal cross section of the lower pillar portion A when the present invention is applied to the van-type vehicle 1 shown in FIG.

That is, at the end of the cross member inner 3 constituting the cross member 2 in the present embodiment, a closing portion 3a for closing the rear end of the side member 5 is provided. A pair of side flanges 5a and 5b, which are formed at both ends in the vehicle width direction, are welded to the rear end of the side member 5 on the outer surface of the closing portion 3a on the front side of the vehicle body. A rear floor corner plate 6 extending from the pillar side is welded to the inner surface on the rear side of the vehicle body at the same point as the welding point of the pair of side flanges 5a and 5b. The side member 5 is formed in a hat shape with an open top, extends in the vehicle front-rear direction, and is provided on the lower surface of the floor panel 11.

Further, the cross member outer 4 constituting the cross member 2 together with the cross member inner 3 is provided with a working hole 7 used for welding the rear floor corner plate 6 to the cross member inner 3. Further, a first guide flange 3b bent at the front side of the vehicle body is provided at an end edge of the cross member inner 3, and correspondingly, an end edge of the rear floor corner plate 6 is provided at a rear side of the vehicle body. A bent second guide flange 6a is provided.

Next, a procedure for assembling the lower pillar A according to the above configuration will be described with reference to FIGS. That is,
When assembling the pillar lower section A, first, as shown in FIG. 1, the cross member inner 3 is spot-welded to the outer peripheral flange 11a of the floor panel 11 forming the rear floor of the vehicle body. At this time, the closing part 3 of the cross member inner 3 is
a at the rear end of the side member 5;
b is spot-welded and temporarily fixed, and the rear end of the side member 5 is closed. With this, the side member 5
The shape of the rear end portion is frozen, and deformation such as lateral opening on the rear end portion side is prevented. Then, cross member outer 4
Is attached to the inner cross member 3 and welded to form the cross member 2.

Subsequently, the rear pillar body 13 is assembled as shown in FIG. In FIG. 2, the cross member outer 4 is omitted. At this time, the rear pillar body 1
3, a rear floor corner plate 6 is attached in advance in a separate process. The rear floor corner plate 6 is attached in such a manner that the rear floor corner plate 6 is in contact with the back side of the pillar outer 14 so as to cover the cutout 15 provided in the pillar outer 14 forming the rear pillar body 13 from the inside. This is performed by spot welding the two at the peripheral portion 14a of the notch 15.

When assembling, the rear pillar body 13 is moved from the side of the vehicle body, and the rear floor corner plate 6 is overlapped with the closing portion 3a of the cross member inner 3. In this case, the first guide flange 3b on the side of the cross member inner 3 and the second guide flange 6a on the side of the rear floor corner plate 6 come into contact with each other, so that the edge of the rear floor corner plate 6 and the cross member The inner 3 is prevented from being caught by the edge.

Thereafter, as shown in FIG. 3, the rear floor corner plate 6 is spot-welded to the closing portion 3a of the cross member inner 3 through the working hole 7 provided in the outer cross member 4. Note that the cross member outer 4 is also omitted in FIG. In such a welding operation, one electrode of a spot welding gun G (not shown) is
The pair of side flanges 5a, 5 of the side member 5 described above.
b and the other electrode 5b, which is bent downward at the end of the side member 5 and the other electrode is applied to the rear floor corner plate 6 side, so that they can be simultaneously and firmly connected to the cross member. Closed part 3 of inner 3
a.

As described above, in the vehicle body structure according to the present embodiment, the cross member inner 3 and the side member 5
Since it is possible to prevent deformation such as lateral opening at the rear end side of the side member 5 at the time of joining with the side member 5, the mounting accuracy of the side member 5 can be improved. As a result, the rigidity as designed can be secured in the tailgate without variation.

Also, since the rear floor corner plate 6 is welded to the closing portion 3a of the cross member inner 3 at the same position as the joint position of the rear end of the side member 5, the rear member has a portion near the rear end of the side member 5. Sufficient rigidity can be secured. Therefore, the rigidity near the rear end of the side member 5 can be improved without increasing the thickness of the rear floor corner plate 6.

Further, in the present embodiment, by connecting the rear floor corner plate 6 to the pillar outer 14 in advance as described above, compared with the case where the rear floor corner plate 6 is provided on the cross member inner 3 side, A high coupling strength can be secured between the rear pillar main body, 13 and the cross member inner 3.

When the rear floor corner plate 6 is spot-welded to the inner cross member 3, the pair of side flanges 5a and 5b of the side member 5 are simultaneously formed.
When the pair of side flanges 5a and 5b of the side member 5 are welded to the closing portion 3a of the inner cross member 3 as described above, it can be simplified to a degree of temporary fixing. . Therefore, the efficiency of the tailgate assembling work can be improved.

In the present embodiment, the first guide flange 3b on the side of the cross member inner 3 and the second guide flange 6a on the side of the rear floor corner plate 6 allow the rear pillar body 13 to be assembled at the time of assembly work. The edge of the rear floor corner plate 6 and the edge of the cross member inner 3 are prevented from being caught. Therefore, good workability can be ensured for the tailgate assembling work.

[0026]

As described above, according to the first aspect of the present invention, when assembling the tailgate, a pair of side flanges at the rear end of the side member are connected to the closing portion of the cross member inner in advance. The shape of the rear end of the side member is frozen to prevent deformation such as lateral opening at the rear end. Therefore, it is possible to improve the mounting accuracy of the side members, and as a result, it is possible to secure the rigidity as designed in the tailgate without variation.

After assembly, sufficient rigidity can be ensured near the rear end of the side member. Therefore, the rigidity near the rear end of the side member can be improved without increasing the thickness of the rear floor corner plate.

In addition to the above, in the invention of claim 2,
Since the rear floor corner plate can be connected to the rear pillar in advance, a higher bonding strength is secured between the rear pillar and the cross member inner than when the rear floor corner plate is provided on the cross member inner side. It becomes possible.

When the rear floor corner plate is joined to the inner cross member, the pair of side flanges at the rear end of the side member can be firmly joined at the same time. Therefore, when connecting the side member to the closing portion of the cross member inner prior to the rear floor corner plate, it can be simplified,
The efficiency of the tailgate assembling operation can be improved.

Further, according to the third aspect of the present invention, when the rear pillar is assembled, the first guide flange and the second guide flange come into contact with each other, so that the edge of the rear floor corner plate and the edge of the closing portion are provided. The edge was prevented from being caught. Therefore, good workability can be ensured for the tailgate assembling work.

[0031]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a joining process of a side member and a cross member inner at a lower portion of a pillar according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a rear pillar attaching process in the embodiment, with a cross member outer removed.

FIG. 3 is a perspective view showing a state where a cross member outer after a rear pillar is attached is removed in the embodiment.

FIG. 4 is a schematic view corresponding to FIG. 6 showing the embodiment.

FIG. 5 is a perspective view showing a tail gate portion of the van type vehicle.

FIG. 6 is a horizontal sectional view of a lower portion of a pillar showing a conventional technique.

[Explanation of symbols]

 Reference Signs List 2 cross member 3 cross member inner 3a closing portion 3b first guide flange 5 side member 5a pair of side flanges 5b pair of side flanges 6 rear floor corner plate 6a second guide flange 7 work hole 13 rear pillar body

Claims (3)

[Claims] 1. A side member disposed on a lower surface side of a floor and a rear floor corner plate connecting a rear pillar are connected to an end of a cross member inner forming a cross member at a tailgate of a van type vehicle. In the lower pillar body structure, a closing portion for closing a rear end portion of the side member is provided on the cross member inner, and a rear end portion of the side member is formed on an outer surface of the closing portion on a vehicle body front side in a vehicle width direction. A lower pillar body structure for a tailgate, wherein a pair of side flanges formed on both sides are connected to each other, and the rear floor corner plate is connected to an inner surface of the closing portion corresponding to the rear side of the vehicle body. 2. A cross member outer which forms the cross member together with the cross member inner is provided with a working hole used for connecting the cross member inner and the rear floor corner plate, while the rear floor corner in the cross member inner is provided. 2. The lower body structure of a tailgate pillar according to claim 1, wherein a connecting point of the plate coincides with a connecting point of the pair of side flanges of the side member. 3. A first guide flange bent toward the front of the vehicle body is provided at an edge of the closing portion of the inner cross member, and bent toward the rear of the vehicle body at an edge of the rear floor corner plate. The vehicle body structure according to claim 2, wherein the formed second guide flange is provided so as to correspond to the first guide flange.