JPS59106373A - Car frame member joint structure - Google Patents

Abstract

PURPOSE:To perform positioning of both outer side faces easily and accurately by forming a step in the way of curved face at lower end of pillar outer side face while forming a flat face section from the step section then lapping the flat face section over the sill outer upper face. CONSTITUTION:A step section 4c is provided in the way of curved face 4a at the lower end section of front side face of rear pillar outer 4A while a flat face section 4b is formed at the end. Then the flat face section 4b is lapped over the step section 1a at the rear end of sill outer 1A upper face and spot welded. Consequently the flat face section is made clear and the worker can confirm with eye to position the flat face section 4b accurately on the step section 1a of sill outer 1A upper face. While since the flat face projection length from curved face 4a to the end of flat face section 4b is shortened, the lower width is enlarged by that to improve getting on/off performance.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure for connecting a frame member of a vehicle body, and more particularly, a joint structure between a busy frame member of a vehicle body vertical frame member and a side sill of a lower longitudinal frame member of the vehicle body.

Fig. 1 shows the skeletal structure of an automobile body.A side sill 1 extends in the front and back direction on both 11111 parts of a single floor 2, and is connected to all front pillars 3 at the front end, while the side sill 1 is connected to all front pillars 3 at the rear end. It is connected to the rear villa 4 together with the house 5, and a center pillar 6 is connected to the intermediate portion, so that the rigidity of the unit can be improved by connecting the frame members to each other.

Here, the side sill 1 and each pillar 3, 4゜6 are
Both the inner and outer panels have a completely closed cross section, but is the required closed section protrusion? In order to ensure that the outer panel does not bulge out to the outside of the vehicle and narrow the interior space of the vehicle. Also, the joints between each pillar 3.4.6 and the side sill 1 in H1j are rounded, that is, rounded, to concentrate stress. It is important to avoid this, so the lower end of the side surface of each pillar outer in the longitudinal direction of the vehicle body is curved and joined onto the sill outer, so that the upper surface of the sill outer and the side surface of the pillar outer are smoothly continuous.

Figures 2 and 3 represent the joint between the sill outer and the pillar outer, and show the joint between the rear end of the sill outer 1 and the lower end of the rear villa outer 4A. Then, the curved surface 4aK is continuous with the flat surface portion 4b' at this end. ! : is formed, and the flat surface portion 4b is superimposed on the upper surface of the sill outer IA for spot bath contact. On the upper surface of the sill outer IA where the flat surface portion 4b overlaps, a step portion 1ai approximately corresponding to the plate thickness of the flat surface portion 4b is formed so that the flat surface portion 4b and the upper surface of the sill outer IA are flush with each other. In addition, a notch 1b'l is formed at the rear end of the rear end group of the sill outer 1, so that the closed section of the side sill 1 and the closed section of the door villa 4 are communicated with each other, and the connecting section between the side sill 1 and the rear villa 4 is closed. The strength of the joint part is considered to be the full size of the movement.

By the way, the flat surface portion 4b at the end of the curved surface 4a of the rear villa outer 4A is formed by extending the curved surface 4a in the tangential direction, so the flat surface portion 4bU! The length may vary due to the squeezing action of the bottom shape of the J Yapillar Outer 4A. It is difficult to keep it constant.

Therefore, if the length of the flat surface g4b is too short, a part of the curved surface 4a will protrude above the step 1a of the sill outer IA, as shown by the chain line in FIG. Welding may be too easy, but in such a case, the 1st curved surface 4a is above the step 1a! Since the curved surface 4a is lifted up, holes and depressions are generated in the spot welded portion of the curved surface 4a, leading to welding defects, resulting in defects that impair both the joint strength and the appearance. Therefore, in order to avoid such a situation, it may be possible to form the flat surface portion 4b sufficiently long, but this does not make the pillar outer 4
The developed shape of A originally has the lower end -114iIi11 widening towards the end, which is a shape that tends to cause punching loss of the steel plate phase, so the single punching loss of the steel plate material increases and the kimono product yield deteriorates. , which will lead to an increase in costs.

The present invention takes into consideration the conventional situation, and makes it possible to easily align the lower end floor part of the side surface of the pillar outer in the longitudinal direction of the vehicle body and the sill outer when joining, and to ensure bath contact.
Moreover, it is an object of the present invention to provide a skeleton part joining structure that can minimize the loss of parts when punching out the pillar outer shell.

In order to achieve the object described in OjJ, in the present invention, a stepped portion is formed in the middle of the curved surface at the lower end of the rearward side surface of the vehicle body 1 of the pillar outer, and the flat surface portion is deformed with the stepped portion as a boundary, This flat surface portion is overlapped and bonded to the upper surface of the sill outer.

Hereinafter, the embodiments of the present invention will be described in detail with reference to all drawings of the embodiments of the present invention, with the same dimensions as -@ for the same parts as in the conventional structure.

In Figures 4 and 5, 4A indicates the rear villa outer 7
, a stepped portion 4c is provided in the middle of the curved surface 4a of the lower end bolt on the ff1J side surface of this rear pillar outer 4A, and a flat surface portion 4 is provided at the end.
b is formed, and this flat surface portion 4b is formed as a sill outer IA.
It is fitted onto the stepped portion 1a at the rear end of the upper surface and spot welded onto the stepped portion 1a.

In this way, since the flat m1 part 41) is formed from the middle of the i-curved surface 4a with the stepped part 4C as a boundary, the M1+curved surface 4
Since the flat projection width from a to the end of the flat surface portion 4b becomes shorter, the stepped portion 1a on the top surface of the sill outer IA may be set at the rear of the sill outer by that amount, or the rear end of the top surface of the sill outer IA was originally a side sill closed cross section and a cabin. In order to form the notch 1b for the purpose of communicating with the closed cross section, iIJ
Even if the stepped portion 1a is set at the sill outer position, as shown by the chain line in FIG. 5, there is no problem in forming the sill outer.

According to the construction of the above embodiment, since the flat surface portion 4b75i is formed with the stepped portion 40 as a boundary from the middle, the flat surface portion 4b is clearly defined, so that the operator cannot visually check it. The flat curved portion 4b'l can be properly aligned and overlapped with the stepped portion 1a on the upper surface of the sill outer IA, making the positioning work extremely easy.
Since b becomes clear, the sill outer IA can be reliably joined to the pillar outer 4A without causing the occurrence of erroneous welding on the curved surface 4a (i7 step portion ll).

Furthermore, since the length of the planar projection from the four curved surfaces 4a to the end of the flat surface portion 4b is shortened, the lower frontage of the vehicle body is widened by that much, and it is also possible to improve the ease of getting on and off the vehicle. Furthermore, a sparkling plate 7 is disposed on the upper surface of the side sill 1 as shown by the chain line in FIG. Since the cutting plate 7 can be made flush with the other parts, the end treatment of the glittering plate 7 can be performed at the same time.

Then, furthermore, as mentioned above, the curved surface 4a is moved from the flat surface portion 4.
Since the length to the end of b can be shortened, the punching loss of the rear villa outer 4A can be significantly reduced, and this can also greatly contribute to cost reduction.

Although the above description has been made by taking as an example six joints between the sill outer and the vehicle outer, it is of course equally applicable to the joints between the sill outer and the front pillar outer and center pillar outer.

As described above, according to the present invention, it is possible to visually check the terminal flat tTa portion at the lower end of the side surface of the pillar outer in the longitudinal direction of the vehicle body, and to properly join the vehicle fitting on the sill outer. There is no problem of joint failure caused by welding curved surfaces, and both quality and reliability can be improved. In addition, since the protrusion length from the general surface of the pillar outer side surface to the end of the flat surface part can be shortened, the cutting loss during punching of the pillar outer can be reduced and costs can be reduced. It's a huge amount.

[Brief explanation of drawings]

Figure 1 is a perspective view of the car body frame; Figure 2 is a perspective view of the structure of the vehicle; Figure 3 is taken along line III-III in Figure 2; Figure W'' and Figure 4 show the structure of the present invention. Figure 5 is a perspective view similar to Figure 1 and Figure 2, and Figure 5 is a sectional view taken along the line v-vH in Figure 4. 1...Side sill, IA...Sill outer, 3...
Front pillar, 4...Rear villa-16...Center pillar, 4A...Rear pillar outer, 4a...t
g Concave curved surface 4b, . . . flat surface portion, 4C . . . stepped portion. -404-

Claims (1)

[Claims] (1) Pillar outer 1t in the vehicle body longitudinal direction! It has a structure in which the lower end of the pillar is curved, and its terminal part is overlapped and joined to the upper surface of the sill outer, and a step is formed in the middle of the curved surface of the pillar outer sacrum, and the step is used as a border. car body m
A structure for joining frame members of a vehicle body, characterized in that a flat surface portion is formed in the rearward direction, and this flat surface portion is overlapped with the upper surface of a sill outer to be joined.