JPH0549515B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to an improvement in the structure of a joint between a pillar and a side sill in an automobile.

[Conventional technology]

To explain the conventional joint structure between a pillar and a side sill, taking the front pillar as an example, the front pillar 1 and the side sill 2 have outer panels 1a and 2, respectively, as shown in FIGS. 1 and 2.
It has a closed section structure in which the inner panels 1b and 2b are joined together, and the lower part of the front pillar 1 is
The lower part of the pillar outer panel 1a is overlapped with the outside of the sill outer panel 2a, and the lower part of the pillar inner panel 1b is overlapped with the inside of the sill inner panel 2b, so that it is bonded to the side sill 2. In addition, in FIG. 2, the reference numeral 6 is a floor panel. (For example, Utility Model Application Publication No. 57-47481) In such a conventional joint structure, the front pillar 1 has input from, for example, the front suspension 3 (hereinafter referred to as suspension).
is transmitted via the hood reinforcement 4, a bending moment will inevitably act on the front pillar 1, and the front pillar 1 will be supported at the joint S with the side sill 2. The vehicle body tends to fall and deform mainly in the front-rear direction, and a large bending stress is applied particularly to the vicinity of the joint S between the front pillar 1 and the side sill 2. In this case, since the bending rigidity of the joint S is relatively high, the joint S itself is unlikely to undergo bending deformation, but the rigidity of the front pillar 1 and side sill 2 portions adjacent to the joint S is , is usually smaller than the joint S, so the part adjacent to the joint S is suddenly bent and deformed by the large bending stress, and the problem is that it is easy to bend and deform plastically. have.

In order to solve this problem, conventionally, as shown in FIG. 2, a bulge 5 is formed in a portion of the front pillar 1 adjacent to the joint S to bulge toward the rear of the vehicle body. , this bulge 5 is installed on the upper wall of the side sill 2. According to this type, the bending rigidity itself of the portion of the front pillar 1 adjacent to the joint portion S is ensured to be large by the amount of the bulge portion 5, and the bulge portion 5 is secured to the side sill 2 adjacent to the joint portion S. Since it acts as a part that suppresses bending deformation of the portion, plastic bending deformation of the front pillar 1 and the like near the joint S is prevented to some extent. However, when an extremely large suspension input is transmitted to the front pillar 1, even if the bulge 5
Even if the bending rigidity in the vicinity is increased, there is a risk that the bending rigidity will be insufficient and the vicinity of the joint S will undergo plastic bending deformation. had become inadequate.

[Purpose of the invention]

The present invention has been made based on the above-mentioned viewpoints, and its purpose is to secure sufficiently large bending rigidity in the vicinity of the joint between the pillar and the side sill, and to reduce the plasticity in the vicinity of the joint. To provide a joint structure between a pillar and a side sill that reliably prevents bending deformation.

[Structure of the invention]

The basic structure of the present invention is a vehicle pillar and side sill joint structure in which a pillar outer panel and a side sill outer panel are constructed as separate members, and the portion adjacent to the joint between the pillar and the side sill and the joint erecting a rain force on the lower wall of the side sill portion adjacent to the side sill portion, connecting the pillar outer panel, the side sill outer panel, and the sill inner panel via the rain force, and connecting the lower wall of the side sill portion with the rain force; The leading edge of this reinforcement is extended toward the pillar inner panel to form a bent portion, and this bent portion is joined to the edge of a working hole formed in the pillar inner panel.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

In the first embodiment shown in FIGS. 3 to 5, a joint structure between a front pillar and a side sill is shown, and the lower part of the front pillar 1 is joined to the front end of the side sill 2 as in the conventional case. However, unlike the conventional model, a rain force 10 is installed between the front pillar 1 and the side sill 2.

In this example, the rain force 10
is a steel plate having a plate surface along the longitudinal direction of the side sill 2, and is a steel plate having a plate surface along the longitudinal direction of the side sill 2, and the upper and lower flanges 1 of the side sill 2.
1 and 12, and a protruding portion 15 that protrudes upward from the base portion 13 along the joining flange 14 at the bulging portion 5 of the front pillar 1. ing. The rain force 10 includes outer panels 1a and 2 of the front pillar 1 and the side sill 2.
a, the protruding portion 15 of the rain force 10, which is arranged to be sandwiched between the inner panels 1b and 2b;
The rear edge is sandwiched between the joining flanges 14 and spot welded, while the upper edge of the base portion 13 that is continuous with the rear edge of the protrusion 15 is sandwiched between the upper flanges 11 of the side sill 2 and spot welded. Note that the joining flange 14a on the pillar outer panel 1a side constituting the bulge 5 is connected to the pillar inner panel 1.
It extends downward from the joining flange 14b on the b side, and the extended portion is spot welded to the upper flange 11 of the side sill 2 together with the reinforcement 10. The front side of the lower edge of the base part 13 is sandwiched between the lower flanges 12 of the side sill 2 and spot welded together with the pillar inner panel 1b, and the rear side of the lower edge of the base part 13 is placed between the lower flanges 12 of the side sill 2. They are directly sandwiched in between and spot welded. Furthermore, in this embodiment, a bent piece 20 extending toward the pillar inner panel 1b is integrally formed on the front edge of the reinforcement 10.
A joining flange 21 formed at the end of the bent piece 20 on the pillar inner panel 1b side is spot welded to one side edge of a working hole 16 formed in the pillar inner panel 1b.

Therefore, in this embodiment, if an extremely large suspension input is transmitted to the front pillar 1, an extremely large bending stress will act in the vicinity of the joint S between the front pillar 1 and the side sill 2. At this time, the front pillar 1 portion adjacent to the joint S tends to bend and deform, for example, in the direction indicated by arrow A in FIG. 4, but the reinforcement 10 acts to prevent the front pillar 1 portion from deforming. Accordingly, the bending rigidity of the front pillar 1 portion is sufficiently large, and there is no possibility that the front pillar 1 portion will undergo large bending deformation, and the fear that the front pillar 1 portion will be plastically bent is valid. be avoided. On the other hand, due to the large bending stress, the portion of the side sill 2 adjacent to the joint portion S also
Although the reinforcement 10 tries to bend and deform in the direction shown by the arrow B in the figure, the side sill 2
It works to prevent deformation of the part, so
Sufficient bending rigidity of the side sill 2 portion is also ensured, and the possibility that the side sill 2 portion is largely bent and deformed plastically is also effectively avoided. In addition, in this embodiment, since the bent piece 20 extending to the front edge of the reinforcement 10 is welded to the side edge of the working hole 16 of the pillar inner panel 1b, for example, when a load is applied to the front pillar 1, Even if the front pillar 1 attempts to fall and deform in the longitudinal direction of the vehicle body, as shown by arrow A in Fig. 4, or if the front pillar 1 attempts to fall and deform in the vehicle width direction, as shown by arrow C in Fig. 5, The bent piece 20 acts to prevent the pillar inner panel 1b from collapsing and deforming, and can sufficiently compensate for the lack of strength due to the large working hole 16 in the pillar inner panel 1b. As a result, the front pillar 1 is effectively prevented from collapsing.

In addition, in the second embodiment shown in FIGS. 6 and 7, the joint structure between the front pillar 1 and the side sill 2 has substantially the same structure as in the first embodiment, but Unlike the above, a bent piece 25 extending toward the sill outer panel 2a side is integrally formed on the rear edge of the base portion 13 of the reinforcement 10, and joining flanges 26, 27 are formed at the upper and lower ends of the bent piece 25. , respective joining flanges 26,
27 are welded to the inner surfaces of the upper and lower walls of the sill outer panel 2a.

Therefore, according to this embodiment, in addition to providing the same functions and effects as those of the first embodiment, the bent piece 25
Since the bending rigidity of the portion of the side sill 2 adjacent to the joint S is further increased, plastic bending deformation in the vicinity of the joint S is more reliably prevented.

Note that the specific shape of the rain force 10 is not limited to that shown in each of the above embodiments, and in each of the above embodiments,
Although each of the reinforcements 10 is constructed from a single plate, it is not necessarily limited to this, and may be constructed using a plurality of members. Further, in the above embodiment, the rain force 10 is disposed so that a part of the rain force 10 straddles the joint S between the front pillar 1 and the side sill 2, but the present invention is not limited to this. Without straddling the above joint S,
The reinforcement 10 may be constructed between a portion of the front pillar 1 and a lower wall portion of the side sill 2 adjacent to the joint portion S. Furthermore, in each of the above embodiments, the joining flanges 11, 12, 14a, 14b of the front pillar 1 and the side sill 2 are used as joining parts of the reinforcement 10, but the joining flanges 11, 12, 14a, 14b
There is no problem in using the wall surface of front pillar 1 etc. without using. Furthermore, in each of the above embodiments, the present invention is applied to the joint structure between the front pillar 1 and the side sill 2, but it goes without saying that the present invention can also be applied to the joint structure between the center pillar or rear pillar and the side sill 2. be.

〔Effect of the invention〕

As explained above, according to the structure of the joint between the pillar and the side sill according to the present invention, it is possible to ensure a sufficiently large bending rigidity in the vicinity of the joint between the pillar and the side sill, thereby causing large bending deformation in the vicinity of the joint. can be effectively suppressed, and to that extent, plastic bending deformation in the vicinity of the joint can be reliably prevented. In addition, the leading edge of the reinforcement is extended into the pillar and joined to the edge of the working hole opened in the pillar inner, which increases the strength of the peripheral edge of the working hole and reduces the lack of strength of the pillar inner due to the working hole. The effect is that the minute is reinforced by the rain force.

[Brief explanation of the drawing]

Fig. 1 is a side view of a structural member seen from the side of the automobile, showing the positional relationship between the front pillar and side sill, and Fig. 2 is the middle part of Fig. 1 showing an example of a conventional joint structure between the front pillar and side sill. FIG. 3 is an exploded perspective view showing a first embodiment of the joint structure between a front pillar and a side sill according to the present invention; FIG. 4 is an exploded perspective view showing the arrangement position of the reinforcement. FIG. 5 is a cross-sectional view taken along the line in FIG. 3, and FIG. 6 is an exploded perspective view showing a second embodiment of the joint structure between a front pillar and a side sill according to the present invention. , and FIG. 7 is a cross-sectional view taken along the line in FIG. 6. S...Joining part, 1...Front pillar (pillar), 2...Side sill, 10...Reinforce, 13...Base part, 15...Protrusion part, 20...
...Folded piece, 25...Folded piece.

Claims (1)

[Claims] 1 A pillar-side sill joint structure of a vehicle in which a pillar outer panel and a side sill outer panel are constructed as separate members, which includes a portion adjacent to the joint portion between the pillar and the side sill, and a lower wall of the side sill portion adjacent to the joint portion. erect a rain force, connect the pillar outer panel, side sill outer panel, and sill inner panel via this rain force, and connect the lower wall of the side sill portion to the rain force, and connect the front edge of this rain force to the pillar inner A joint structure between a pillar and a side sill, characterized in that a bent portion is formed by extending toward the panel side, and the bent portion is joined to an edge of a working hole formed in the pillar inner panel.