JPH08239057A - Jointing structure between floor side end part and center pillar lower part of vehicle - Google Patents

Abstract

PURPOSE: To relieve damage an occupant receives by reinforcing a part around a fixed part of the lower end part of a center pillar with a side sill without forming an excessive protrusion to the inside of a cabin, and reducing an inwardly deformed amount of the center pillar and the side sill at the time of side collision. CONSTITUTION: This vehicle body, where a doubler 3 is secured onto a floor 4 to form a closed cross section part in the vehicle cross direction at a part of center pillar 1, has such a structure as a reinforce outrigger 5 whose end is jointed to the lower side end surface of the floor 4 and secured onto a closed section part in the vehicle cross direction passes through the cross section of a side sill 2 and the center pillar 1 and is secured onto the pillar inner 11 of the center pillar 1 to reinforce a wide range from the side sill 2 to the lower part of the center pillar 1, from the inside of the cross section part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for connecting a floor side end of a vehicle and a center pillar lower portion.

[0002]

2. Description of the Related Art In a vehicle body, as shown in FIG. 5, a center pillar a is generally formed by a pillar inner and a pillar outer so as to have a closed cross section, and a lower end portion of the center pillar a is connected to a side sill b which forms a longitudinally closed cross section of a lower portion of the vehicle body. In general, the upper end portion is fixed to a roof side rail having a closed cross section in the front-rear direction on the upper part of the vehicle body. Further, the left and right sides of the floor c are fixed to the lower portion on the inner side of the side sill b, and the side end of the cross member d which is fixed on the floor c and forms a closed cross section in the vehicle width direction is a center pillar of the side sill b. In general, the structure is such that it is abutted and fixed to the inside of the lower end fixing portion of the pillar inner of a.

In the general center pillar structure described above, the side end of the cross member d and the lower end of the pillar inner of the center pillar a are directly connected by the bracket e as shown by the chain line in FIG. The one in which the load applied to the lower end of the center pillar is transmitted and distributed to a cross member having high rigidity to improve the rigidity of the entire body has been developed conventionally and is disclosed in Japanese Utility Model Laid-Open No. 61-7473.

[0004]

Since the center pillar of the vehicle is located almost directly beside the occupant in the front seat, the deformation of the center pillar to the inner side at the time of a side collision has a great influence on the obstacle to the occupant. . That is, in general, the center pillar is thicker below it (large cross-sectional area) and thinner above it (small cross-sectional area) at the height position of the window shoulder of the door. Often, the structure changes suddenly. Therefore, at the time of a side collision, the center pillar is likely to bend inward near the area where the cross section suddenly changes, that is, near the center in the vertical direction. However, there is a risk of serious damage to the front seat occupants.

Therefore, a strength discontinuity portion (a portion that is more easily bent than the above-mentioned sudden change in cross section) against the input load from the side is positively formed in the lower position of the center pillar, and the center pillar is set at the initial stage of the side collision. By bending and deforming inward at the strength discontinuity, the center and upper parts of the center pillar, which may give a shock to the front seat occupant, do not have any partial bends and are almost even as a whole. The present applicant has developed a structure that is displaced inward and the amount of displacement is relatively small so that the impact on the occupant can be minimized, and a utility model registration application has already been filed as Japanese Patent Application No. 5-20244. are doing.

In this way, in the case of a side collision, in order to accurately bend and deform the center pillar at the strength discontinuity portion which is positively provided in advance, that is, at the position below the center pillar, the upper and lower end portions of the center pillar, especially the lower end portion, are to be deformed. The structure and the side sill around it should be able to securely receive the collision load, and to effectively transfer the load from the lower end of the center pillar and the side sill to which it is fixed to the floor.
As in the prior art shown in Fig. 3, in the joint structure in which the side end of the bracket fixed to the side end of the cross member fixed to the floor is butted and fixed to the center of the inner surface of the lower end of the pillar inner, the collision load is It can only partially receive it, and it is difficult for the side sill to effectively absorb the initial input load. In addition, the width of the bracket is increased and the side end of the bracket rises gently upward, and is joined and fixed so as to wrap around the entire lower end of the pillar inner of the center pillar, thereby forming a wide closed cross section from the cross member to the center pillar. By doing so, the side sill and the cross member can firmly receive the collision load at the time of a side collision, and a stable bending deformation of the center pillar can be obtained.However, if a wide continuous closed cross section is formed in this way, the bracket interior This causes a problem that not only it becomes difficult to secure a space under the foot of the rear seat occupant, but also it becomes very difficult to attach the pipes, harnesses, etc. that pass back and forth along the inner surface of the side sill.

An object of the present invention is to solve the above conventional problems.

[0008]

SUMMARY OF THE INVENTION The present invention provides a vehicle body structure in which a doubler that forms a flat closed section in the vehicle width direction is fixed to the upper surface of a floor, and the side end of the doubler is fixed to a side sill. The part is joined and fixed to the floor and the doubler at the lower surface of the side end part of the floor, and passes from the side end of the floor through the cross section of the side sill, and the other end is fixed to the pillar inner of the center pillar within the cross section of the center pillar. A phosphorus hose outrigger that is formed to form a closed cross section is provided, and the vehicle width direction closed cross section formed by a doubler joined and fixed to the floor by the phosphorus hose outrigger and the lower end portion of the center pillar are connected. To do.

[0009]

As described above, the lower portion of the center pillar and the doubler forming the vehicle width direction closed cross section are connected by the phosphorus hose outrigger that passes from the lower surface of the side end portion of the floor to the side sill cross section and the center pillar cross section. With this structure, the side sill below and around the center pillar firmly receives the load against the initial input load at the time of a side collision without being deformed over a wide range, whereby the center pillar is formed in the lower position. It bends reliably at the strength discontinuity, and it displaces almost uniformly inward from the center of the center pillar, which has a large impact on the occupant, to the upper part without partial bending, and the collision energy after that is the side sill. Since the vehicle slowly absorbs deformation, the amount of displacement of the center pillar inward is relatively small, and the impact on the occupant is large. It is possible to relax in. Further, as described above, the phosphorus hose outrigger that directly connects the vehicle width direction closed cross section formed by the doubler on the floor and the lower part of the center pillar is arranged from the bottom surface of the floor through the cross sections of the side sill and the center pillar. Since it is installed, there is no additional reinforcing member in the passenger compartment, sufficient foot space for the rear seat occupants is secured, and there is no adverse effect on the installation of piping, harnesses, etc. that pass back and forth along the inner surface of the side sill. Absent.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a general view of the present invention. Reference numeral 1 is a center pillar having a closed cross section composed of a pillar inner and a pillar outer, and has a structure reinforced by a phosphorus hose provided in the cross section. At a predetermined height position below the center pillar 1, a strength discontinuity 1a, which has the weakest strength against an input load from the side, is formed, and a collision load is applied to the center pillar by a side collision. When the is input, the center pillar is bent inward from the strength discontinuity portion 1a as shown by the broken line, so that the center pillar is displaced substantially uniformly inward from the central portion to the upper portion without being partially bent. ing.

The side sill 2 is, as conventionally known,
Reference numeral 3 denotes a doubler that is configured by a side sill inner 21 and a side sill outer 22 in a closed cross section, and is reinforced by a side sill lin hose 23 that divides the cross section. The side end of the doubler 3 is fixed to the inner surface of the side sill inner 21.

The reference numeral 5 passes from the lower surface of the floor 4 through the cross section of the side sill 2 and the cross section of the lower part of the center pillar 1, and the closed cross section formed on the floor 4 by the doubler 3 and the lower end of the center pillar 1. It is a phosphorus hose outrigger that connects the parts.

As shown in FIG. 2, the phosphorus hose outrigger 5 is composed of a phosphorus hose outrigger inner 51 and a phosphorus hose outrigger outer 52.

The phosphorus hose outrigger inner 51 has a curved surface having a width substantially the same as the width of the center pillar from the lower part of the floor 4 to the upper end of the side sill inner 21, and the thickness of the center pillar from both left and right ends of the curved surface. A curved hat-shaped cross section 51a formed by a vertical surface that rises and a flange that is parallel to the front-rear direction of the vehicle body, and side sillin hose coupling portions 51b and 51b that extend in the front-rear direction from the flange of the curved hat-shaped cross-section 51a. Has been done.

The phosphorus hose outrigger outer 52 includes a curved surface that rises and curves from the lower part of the floor 4 to the lower part of the strength discontinuity, and a vertical surface that rises from the left and right ends of the curved surface by the thickness of the center pillar and the vehicle longitudinal direction. With a curved hat-shaped cross-section 52a formed by a flange parallel to the side hull, and a cross-section 52b in the front-rear direction corresponding to the side sill phosphorus hose couplings 51b and 51b of the phosphorus hose outrigger inner 51. . The phosphorus hose outrigger inner 51 and the phosphorus hose outrigger outer 52 form a substantially cross-shaped phosphorus hose outrigger 5.

At the connecting position of the lower end of the center pillar 1 of the side sill 2 composed of the side sill inner 21, the side sill outer 22, and the side sill outer hose 23, there is provided an opening 21a communicating from the side end of the floor 4 into the cross section of the side sill. 21 is formed in the vicinity of the lower part of the side pillar sill, and an opening 22a is formed in the upper part of the side sill outer 22, which communicates from the cross section of the center pillar 1 to the cross section of the side sill.
Further, the side sillin hose 23 is divided into front and rear portions at a predetermined range at the relevant portion, and these opening portions 21a, 2
The phosphorus hose outrigger 5 can be attached at the discontinuity of the 2a and the side sillin hose 23.

The inner portion of the lower end of the curved hat-shaped cross-sections 51a, 52a of the phosphorus hose outrigger 5 having the above-mentioned cross shape is applied to the lower surface of the side end portion of the floor 4 and welded and fixed to the floor 4 and the doubler 3. Horse outrigger 5
In the cross section of the side sill 2 from the opening 21a of the side sill inner 21 to extend upward and curve into the cross section of the center pillar 1 from the opening 22a of the side sill outer 22, the phosphorus hose outrigger 5 and the side sill inner. 21 and the side sill outer 22 are welded and fixed to each other, and the phosphorus hose outrigger 5 is welded and fixed to the pillar inner 11 of the center pillar 1 so that the side sill 2 and the vehicle width direction closed cross section formed by the floor 4 and the doubler 3 are fixed. The center pillar 1 has a structure in which it is firmly joined to the lower end portion of the phosphorus hose outrigger 5 by the curved hat-shaped cross-sections 51a and 52a of the phosphorus hose outrigger 5, and within the cross section of the side sill 2 the side sill phosphorus hose joint 51b of the phosphorus hose outrigger 5. 51b is a side silirin hose 23 divided into front and rear The side sillin hose 23 is integrally connected to the front and rear at the side silrin hose joints 51b and 51b by joining and welding and fixing to this portion, and the side sills 2 themselves are strongly reinforced by the phosphorus hose outrigger 5. The structure will be changed.

As described above, the phosphorus hose outrigger 5
By adopting a configuration in which the lower part of the floor 4 to the inside of the cross section of the side sill 2 and the center pillar inner 11 are strengthened from the inside of the cross section, the thickness of the doubler 3 fixed to the upper surface of the floor 4 (inside the passenger compartment) The side sill inner 2
It becomes easy to attach the pipes, harnesses, etc. arranged in front and back along the inner surface of 1.

It should be noted that in the embodiment shown in FIGS. 1 and 2, the phosphorus hose outrigger inner 51 is replaced by the curved hat-shaped cross section 51.
An example is shown in which front and rear side sillin hose coupling portions 51b and 51b separately formed on the flange of a are integrally welded and fixed. As shown in FIG. 3, the curved hat-shaped cross-section portion 51a and the side silrin hose are shown. Coupling parts 51b, 51
The phosphorus hose outrigger inner 51 having b may be configured as an integral body.

In the above, in the case of a side collision in which another vehicle has thrust into the center pillar portion from the side, the front bumper of the other vehicle first crashes near the lower portion of the center pillar.
At that time, the center pillar 1 is, as shown by the broken line in FIG.
A strength discontinuity 1a formed at a predetermined height position below
From the central part to the upper part of the center pillar 1 which has a large impact on the occupant and is displaced substantially uniformly inward without being partially bent, and the displacement amount is relatively small and the occupant suffers. The shock can be significantly reduced.

In this case, in order for the center pillar 1 to be bent accurately at the strength discontinuity portion 1a, it is necessary to firmly receive the load at the initial stage of the collision around the lower end joint portion of the center pillar 1 of the side sill 2. As described above, since the phosphorus hose outrigger 5 is firmly coupled within a predetermined range from the lower portion of the floor 4 to the pillar inner 11 in the cross section of the side sill 2, the side sill portion is supported from the inside, and the load at the initial stage of collision is The center pillar 1 is securely received by the phosphorus hose outrigger 5, and the center pillar 1 is surely bent and deformed at the strength discontinuous portion 1a.
The input load effectively absorbs the collision energy due to the gentle deformation of the side sill portion and the wide dispersion from the side sill to the floor.

[0023]

As described above, according to the present invention, the side sill portion at the lower end portion of the center pillar is joined by the phosphorus hose outrigger from the lower end portion of the floor within the side sill cross section, and at the joint portion between the floor, the doubler and the side sill inner. ， By continuously reinforcing up to the lower part of the pillar inner, it receives the initial input load at the time of a side collision, so that the strength discontinuity set in the lower part of the center pillar surely bends, and the degree of impact on the occupant. The center pillar of the large-sized center pillar displaces almost uniformly inward from the center to the upper part without being bent, and its displacement amount is relatively small, and the collision energy is absorbed by the gentle deformation of the side sill to reach the floor. Therefore, the damage to the occupants can be minimized.
Further, since the phosphorus hose outrigger is arranged from the inside of the cross section of the side sill to the inside of the cross section of the center pillar, the side sill and the lower part of the center pillar can be strengthened without protruding to the inside of the room, and the foot space of the rear seat occupant can be saved. It can be secured sufficiently, and there is no risk of adversely affecting the installation of piping, harnesses, etc. that pass back and forth along the inner surface of the side sill. Further, since the phosphorus hose outrigger reinforces the inside of the cross section of the side sill to the inside of the cross section of the lower part of the center pillar, it is extremely effective in preventing the twisting behavior of the center pillar due to the pushing of the rear door.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (A) is a front view of a half of a vehicle body center pillar part, a broken line shows a deformed state of the center pillar part at the time of a side collision, and (B) shows ( It is an expanded longitudinal cross-sectional view of the X section of A).

FIG. 2 is an exploded perspective view of the phosphorus hose outrigger shown in FIG.

FIG. 3 is an exploded perspective view showing another example of a phosphorus hose outrigger.

FIG. 4 is an explanatory diagram showing a modified form of the center pillar due to a side collision, in which (A) is a configuration of the present invention,
(B) shows the case of the conventional structure.

FIG. 5 is a perspective view showing a structure in the vicinity of a connecting portion of a conventional general center pillar lower end portion to a side sill.

[Explanation of symbols]

 1 Center pillar 1a Strength discontinuous part 2 Side sill 3 Doubler 4 Floor 5 Linhose outrigger 11 Pillar inner 12 Pillar outer 21 Side sill inner 22 Side sill outer 23 Side sill rin hose 51 Linhose outrigger inner 51a Curved hat cross section 51b Side sill rin hose connection part 52 phosphorus hose outrigger outer 52a curved hat-shaped cross-section 52b front-back hat-shaped cross-section

Claims (3)

[Claims] 1. A lower end of a center pillar having an upper end coupled to a roof side rail is fixed to a floor side end and a side end of a doubler joined and fixed to the floor to form a vehicle width direction closed cross section. In a vehicle body structure of a vehicle coupled to a side sill of a closed cross section, one end is joined and fixed to the floor and a doubler on the lower surface of a side portion of the floor, and the other end passes through the cross section of the side sill from the side end of the floor. Is provided with a phosphorus hose outrigger that is joined and fixed to a lower portion of the center pillar inner in a cross section of the center pillar, and a connecting structure between a floor side end portion of a vehicle and a lower portion of the center pillar. 2. The vehicle structure according to claim 1, wherein the floor-side end portion and the lower portion of the center pillar are connected, the phosphorus hose outrigger includes a phosphorus hose outrigger inner and a phosphorus hose outrigger outer. Is provided integrally or integrally with a side sill rin hose connecting portion that is fixedly joined to the side sill rin hose within the cross section of the side sill, and is connected to the floor side end of the vehicle and the lower part of the center pillar. Construction. 3. The vehicle structure according to claim 1 or 2, wherein the floor side end portion and the center pillar lower portion are connected to each other, the predetermined position at the lower portion of the center pillar is the most responsive to an input load from the side. A structure for connecting a floor side end of a vehicle and a lower part of a center pillar, wherein a strength discontinuous portion having weak strength is formed.