JPH0427676A - Car body structure for automobile - Google Patents

Abstract

PURPOSE:To improve assembly workability for a sill inner by forming the sill inner of a longitudinally extending side sill in a U-shape in cross section in the both sides of a car body, forming the front end wall thereof in a slope, and joining the front end wall in a state to be superposed with a sill mounting surface. CONSTITUTION:In a dash lower panel 10, an oblique wall 12 is formed in succession to a longitudinal wall 11 and a floor part 13 is extended further rearward from the oblique wall 12. A front end wall 19 of a sill inner 17 is joined with the side edge part of the oblique wall 12 of the dash floor panel 10. Longitudinally extended side sills 16 in a closed shape in cross section are formed to both sides of a floor, each side sill being formed with an inner sill 17 and a sill outer 18. In which case, the sill inner 17 is formed in a U-shape in cross section, and the front end wall 19 is formed in a slope matching that of a sill mounting surface 14 of the dash floor panel 10. A flange 22 is formed throughout a range extending between upper and lower walls 20, 21 and the front end wall 19 of the inner sill 17, and the front end part of the sill inner 17 is closed in a bagform manner.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the body structure of an automobile, and in particular to a darts lower panel that separates an engine room from a passenger compartment, and a site that is a longitudinal frame member on both sides of the floor of the vehicle body. This invention relates to the structure of the joint between the sill and the sill inner.

BACKGROUND ART FIGS. 5 and 6 show a conventional structure. In the figures, 1 indicates a darts lower panel, and this darts lower panel l forms a diagonal wall 1b following a vertical wall 1a. A floor portion 1c extends further rearward from 1b. The DANNO EUROABARU 1 and the floor panel 2 are joined by spot welding, with the front end of the floor panel 2 superimposed on the rear end of the floor 1c. A site sill 3 extends in the front-rear direction on both sides of the floor of the vehicle body, and a sill inner 4 and a sill outer 5 form a closed cross section. Sill inner 4
is formed with an inverted cross section j-, and the upper edge flange 4a and the lower edge are connected to the upper and lower edge flanges 5a and sb of the sill outer 5.
A reinforcement 6 is joined in the middle with a clamp A7 to form a closed cross section as described above. Further, this sill inner 4 has a front end wall 4b bent at a right angle toward the outside/\ at the front end, and when assembling it to the vehicle body, the lower end edge of the sill inner 4 is folded before being joined to the sill outer 5. overlaps the flanges Id and 2a on each side edge of the floor part 1c of the lower deck panel 1 and the floor panel 2, and abuts the front end wall 4b against the side of the inclined wall 1b of the lower deck panel 1, and the front end wall 4b side. The edge flange 4c is overlapped with the flange 1d on the side edge of the darts lower panel l, and each overlapped surface is joined by spot welding. This similar structure is shown in, for example, Japanese Utility Model Application Publication No. 58-36769.

[Problems to be Solved by the Invention] When the inner 4 is assembled to the darts lower panel 2, it is held by a predetermined jig (not shown) and its lower edge is attached to the flange of the darts lower panel 1 and the floor panel 2. The sill inner 4 is rotated and positioned as shown by the arrows in FIG. During rotation 1 positioning work of the sill inner 4, a part of the bent corner of this front end wall 4b is attached to the dart lower panel 1.
easily interfere with the side edge of the inclined wall 1b. Kono Tanu, Shiluinna 4
When positioning the rotation 9, the installation of the sill inner 4 in the front-rear direction must be adjusted, which makes the joining work complicated. Furthermore, since the front end wall 4b is bent at right angles and is joined by abutting against the surface of the slanted wall 1b, when a tensile load is applied rearward to the sill inner 4, this load is transferred to the front end wall 4b and the slanted wall. This acts on the bonded portion with 1b in a peeling direction that is disadvantageous in terms of strength. Furthermore, the darts lower panel 1 and the floor IC are only spot-joined in a small and limited area between the side flange 1d and the lower end edge of the sill inner 4, so the darts lower panel 1 and the sill inner The bonding strength with 4 becomes lower.

Furthermore, since the front end wall 4b of the sill inner 4 is bent outward at a right angle, due to deep drawing during press forming,
To prevent cracks or wrinkles from occurring at the bent portion of the front end wall 4b,
In consideration of moldability, it is necessary to provide a notch 4d on the upper side of the front end wall 4b. If this notch 4d is left as it is, road noise and chipping noise will be transmitted from the closed surface of the side sill 3 to the vehicle interior through the notch 4d, and dust will enter the vehicle interior, so patch or fill it with another part. It is necessary to cover it with sole material or the like, which makes workability worse and becomes disadvantageous in terms of cost. Furthermore, even if the notch 4d is filled with a filler material, stress concentration will occur in the notch 4d during a frontal collision of the vehicle, which is disadvantageous in terms of strength.

Therefore, the present invention is a darts lower panel for the inside. Assembly to the floor panel not only improves work efficiency, but also increases the bonding strength between the sill inner and the darts lower panel.Furthermore, even in the event of a frontal collision of the vehicle, the front end of the sill inner and the darts lower panel can be easily bonded. To provide an automobile body structure in which stress concentration does not occur in any part.

Means for Solving the Problem A sill mounting surface that is inclined diagonally forward is formed on the side edge of the slanted wall formed at the connection between the vertical wall of the darts lower panel and the floor part, while the sill mounting surface is formed on both sides of the floor of the vehicle body. A full inner side sill extending in the longitudinal direction is formed to have a U-shaped cross section, and its front end wall is formed into an inclined surface that aligns with the sill mounting surface of the darts lower panel, and the upper and lower walls of the sill inner Forming a continuous flange on the same plane across the end edge and the front end wall, closing the front end of the sill inner in a bag shape, and superimposing the lower wall of the sill inner on the side edge of the floor portion of the darts lower panel. , the front end wall is overlapped and joined to the sill mounting surface, respectively.

The action inner part of the lower panel. When assembling to the floor panel, attach the sill inner to the lower panel. When pressed against the side edge of the floor panel, the sill inner is moved and adjusted in the front-rear direction due to mutual guiding action between the front end wall of the sill inner and the sloped surface of the sill mounting surface of the darts lower panel, and the sill inner is positioned in the front-rear direction. .

Since the front end wall and the sill mounting surface are joined in a diagonally forwardly inclined state, when a tensile load is applied rearward to the sill inner, this joint between the front end wall and the sill mounting surface Loads can be received in the shear direction that is advantageous in terms of strength, and the sill inner and the floor part of the darts lower panel are joined at the lower wall of the sill inner, expanding the joint area. The bonding strength with the lower panel is increased.

Example Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In Figures 1 to 3, the lower panel lO is the vertical wall 1.
A slanted wall 12 is formed following the slanted wall 12, and a floor portion 13 extends further rearward from this slanted wall 12. The darts lower panel 10 and the floor panel 15 are joined by spot welding, with the front end of the floor panel 15 overlapping the rear end of the floor section 13. A sill attachment surface 14 to which a front end wall 19 of a sill inner 17, which will be described later, is joined is provided on the side edge of the sloped wall 12 of the darts lower panel IO.
It is curved and slopes diagonally forward.

! A side sill 6 extends in the front-rear direction on both sides of the floor of the vehicle body, and a sill inner 17 and a sill outer 18 form a closed cross section. The inner sill 17 is formed to have a U-shaped cross section, and the front end wall I9 is connected to the outer panel 10.
It is formed as an inclined surface that aligns with the sill mounting surface 14 of the sill. Specifically, this front end wall 19 is a thick lower panel I.
It is formed to be inclined forward in accordance with the inclination of the oblique wall 12 of O, and inclined obliquely forward in accordance with the obliquely forward inclination of the sill mounting surface 14. Upper wall 20 and lower wall 2 of sill inner 17
! and the front end wall 19 are formed to have the same width dimension,
A continuous flange 22 is formed on the same plane across the upper and lower walls 20, 21 and the front end wall 19, and the sill inner 1
The front end of 7 is closed like a bag. This sill inner 17
The sill outer 18. Prior to joining with Reinforce 24, attach the lower panel 10. It is joined to the side edge of the floor panel 15. Specifically, the lower wall 2 of the sill inner 17
1 and the flange 22 on the side of the front end wall 19 are superimposed on the flanges of the lower panel 10], the lower wall 21 is superimposed on the floor part 13, and the front end wall 19 is superimposed on the sill mounting surface 14. , joined by spot welding at each overlapping surface.

Further, in this embodiment, the flan 15a on the side edge of the floor panel 15 is bent upward to form the flan +5.
a to the side wall 23 of the sill inner 17 by welding.

According to the structure of the above embodiment, the front end of the sill inner 17 is closed like a bag, and no notch is provided as a countermeasure against deep drawing during press forming. Not only can the damper be highly wetted, but also the noise around the joint between the front end wall 19 and the darts lower panel 10 can be improved, and the sound insulation can be improved.

In addition, the front end wall 19 and the inclined wall 12 of the lower panel 10 are
Since the joint with the mounting surface 14 of
This load can be applied to the joint between the front end wall 19 and the mounting surface 14 in a shearing direction that is advantageous in terms of strength.
Furthermore, following the joint portion of the front end wall 19, the bottom wall 21 of the sill inner 17 is connected to the floor portion I of the lower panel 10.
3, the overlapping area of the bonded portion can be expanded, and therefore, the overall bonding strength between the sill inner 17 and the stiff lower panel 10 can be further increased. Furthermore, as described above, the front end wall 19 of the sill inner 17
The mounting surface 14 of the Gunono Yuroabaol lO is formed diagonally forward.
Sonokoro Abanel 10. When assembling the floor panel 15, sometimes the bottom wall 21 of the sill inner 17 is placed on the floor part 3 of the lower panel 10, and the side wall 23 is brought into contact with the flange 15a of the floor 7/tennel 15 to increase the vehicle width. Once the direction is determined, the front end wall 19 is aligned with the mounting surface 1 by the guide action of the inclined surfaces of the front end wall 19 and the mounting surface 14.
4. Since the position can be adjusted by moving it back and forth to an appropriate size, the installation can be easily adjusted and the joining work efficiency can be improved. Also, Silinna 17's Franz 2
2 is continuous on the same surface 1. Therefore, Rainforce 24
．． The positioning of the outer sill 18 and the joining work can be easily performed, and the workability of a series of joining operations of the side sill 16 to the vehicle floor side can be improved.

Effects of the Invention As described above, according to the present invention, the sill inner is formed into a U-shaped cross section, and the front end wall is formed into an inclined surface to match the mounting surface of the darts lower panel, which is formed obliquely forward. Since the mounting surface is joined in a diagonally forwardly inclined state, the tensile load acting on the sill inner toward the rear can be received at the joint part in a shearing direction that is advantageous in terms of strength. The floor portion of the sill inner and the bottom wall of the sill inner are bonded together by polymerization, thereby increasing the bonding area and significantly increasing the bonding strength between the sill inner and the darts lower panel. In addition, due to the mutual guiding action between the inclined front end wall and the mounting surface,
The sill inner construction material can sometimes be adjusted in the front and rear directions along with the positioning in the vehicle width direction, and the sill inner and darts lower panel. The ease of assembly with the floor panel can be improved. Furthermore, since the sill inner has flanges formed on the same plane from the upper and lower walls to the front end wall, alignment and joining operations with the sill outer can be improved. Since the front end of the sill inner that forms the front end wall is closed in a bag shape, the mechanical strength of the sill inner can be increased, and the sealing performance and sound insulation around the joint between the front end wall and the darts lower panel can be improved. This has a great practical effect in that it can improve the

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a portion corresponding to Fig. 4 A showing an embodiment of the present invention, Figs. 2 and 3 are sectional views taken along the lines ■-■ and ■-■ in Fig. 1, and Fig. 4 is a Side view showing the skeletal structure of the side part of the vehicle, No. 5
The figure is a perspective view of the part corresponding to FIG. 4A showing the conventional structure, and FIG.
FIG. 7 is a cross-sectional view taken along the lines ■--■ and ■--■ in FIG. lO... Datsushiroa panel, 11... Vertical wall, 12
...Slanted wall, 13...Floor part, 14...Mounting surface,
15. Floor panel, 16. Side sill, 17.
Sill inner, 19... Front end wall, 20. Upper wall, 21...
Lower wall, 22... flange. fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig.

Claims (1)

[Claims] (1) A sill mounting surface that is inclined diagonally forward is formed on the side edge of the slanted wall formed at the connection between the vertical wall of the dash lower panel and the floor section, while a sill mounting surface that is inclined diagonally forward is formed on both sides of the floor of the vehicle body in the front-rear direction. The sill inner of the extending side sill is formed to have a U-shaped cross section, and its front end wall is formed into an inclined surface aligned with the sill mounting surface of the dash lower panel, and the sill inner has upper and lower wall edges and a front end wall edge. The front end of the sill inner is closed in a bag shape by forming a continuous flange in the same plane over the edge, and the lower wall of the sill inner is overlapped with the side edge of the floor part of the dash lower panel, and the front end wall is attached to the sill. An automobile body structure characterized by overlapping and joining each mounting surface.