JP2000211551A - Reinforcement structure for vehicular body skeleton member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily control an expansion ratio without generating a part not being rustproofed. SOLUTION: This reinforcement structure for a vehicular body skeleton member has a foaming material 9 which expands with receiving heat from a drying line at a rust-prevention process of the vehicular body filled in a closed section space 20 of a front side member 10 which consists of a closing plate 2 and a side member panel 1. A bracket 7 with an expanded sheet 8 fixed is placed along a longitudinal direction in the vehicular body skeleton member, and a bulkhead 7c which divides an inside of the front side member 10 is provided at both of tips of the bracket 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure of a vehicle body frame member, and more particularly, to a structure in which a foam material is filled in a sectional space of a front side member, a pillar or the like of an automobile composed of an outer panel and an inner panel. Structure.

[0002]

2. Description of the Related Art As this kind of reinforcing structure, for example, as shown in Japanese Patent Application Laid-Open No. Hei 6-278145, a foamed sheet is previously bonded to the inner surface of a vehicle body frame member, and this is used in a rust prevention process of the vehicle body. Some are foamed by the heat of the drying line.

[0003]

However, in such a reinforcing structure, since the vehicle body is immersed in a rust inhibitor after the foam sheet is bonded, a part of the frame member of the vehicle body, that is, the bonding surface of the foam sheet is rust-proof. Processing will not be performed. Further, since it is not easy to fill only the portion of the vehicle body frame member to be reinforced with the foaming material, there is a problem that it is difficult to control the expansion ratio, that is, the cured density.

SUMMARY OF THE INVENTION [0004] In view of such circumstances, an object of the present invention is to provide a reinforcement structure for a vehicle body skeleton member in which an unrusted portion is not generated and the expansion ratio can be easily controlled.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to receiving heat of a drying line in a rust prevention process of a vehicle body in a closed cross-sectional space of a vehicle body frame member composed of an outer panel and an inner panel. In a reinforcing structure for a vehicle body skeleton member filled with a foam material to be foamed by foaming, a bracket to which a foam sheet is fixed is disposed along the longitudinal direction inside the vehicle body skeleton member, and the inside of the vehicle body skeleton member is provided at both ends of the bracket. Characterized in that a partition portion for partitioning is provided.

The vehicle body frame member may be a front side member having an undercut, and the bracket may be disposed in a direction intersecting the undercut.

[0007] The surface of the bracket to which the foam sheet is fixed may be subjected to a rustproofing treatment.

[0008] A plurality of foam sheets may be fixed to one side of the bracket in the longitudinal direction, and holes may be provided between the fixing portions of the foam sheets so that the foam sheets can pass through at the time of foaming.

A plurality of foamed sheets may be alternately fixed on both sides of the bracket in the longitudinal direction, and holes may be provided between the fixed portions of the foamed sheet so that the foamed sheet can pass through at the time of foaming.

[0010] The bracket may be arranged so as to straddle the scooping portion of the front side member.

[0011]

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

FIGS. 1 to 6 show a first embodiment of the present invention. First, the structure will be described.
The front side member 10 including the closing plate 2 and the front side member 10 has a recessed portion 4 on the lower surface side in the vicinity of the joint portion of the engine mount bracket 3 for avoiding interference with the internal components of the engine room. In the closed section space 20 of the front side member 10, the bracket 7 is disposed so as to straddle the scoring portion 4. The bracket 7 has a flat plate portion 7a.
And a flat plate portion 7b.
A partition 7c is provided at both front and rear ends, and the partition 7c is also provided with a bent portion 7d (see FIG. 4).

The bracket 7 is entirely subjected to a rust prevention treatment. When assembling the bracket 7, a plurality of foamed sheets 8 having thermal foaming properties are adhered to both sides of the flat plate portion 7a in the longitudinal direction using an adhesive (see FIG. 5A), and partition walls are provided at both front and rear ends of the flat plate portion 7a. The portion 7c is joined (see FIG. 5B). The bracket 7 is disposed so as to extend from the front end of the undercut portion 4 of the front side member 10 to the mounting point of the suspension member 5, and the flat plate portion 7a and the bent portions 7b and 7d of the partition wall portion 7c are connected to the side member. Each is joined to the inner surface of the panel 1 (see FIG. 5C). In other words, the closed cross section space 20 of the front side member 10 is divided right and left by the partition walls 7c, 7c before and after the bracket 7, and this region is filled with the foam material 9. The foam sheet 8 is foamed by the heat of the drying line in the rust prevention process of the vehicle body to form the foam material 9.

Next, the operation and effect of this embodiment will be described.

The foam sheet 8 is adhered to the relatively small bracket 7 and foamed, instead of the body frame member such as the side member panel 1 and the closing plate 2, so that rust prevention treatment before the body assembly can be performed at the component level. become,
The foam material 9 can be filled in the front side member 10 without any unrust-prevented portions. In addition, since the foamed area of the foamed sheet 8 is separated inside the front side member 10 by the partition walls 7c, 7c before and after the bracket 7, the expansion ratio of the foamed sheet 8, that is, the cured density can be controlled.

The front side member 10
Is offset by S from the axis L _{1 at the} front end and the axis L ₂ of the scooping part 4, and when a load F is applied to the front side member 10 from the front at the time of a frontal collision, the front side member 10 is disengaged from the scooping part 4. , A moment M (= FS) that causes the buckling to occur downward occurs (see FIG. 6). However, since the flat plate portion 7a of the bracket 7 is arranged in the vertical direction so as to intersect with the undercut portion 4, the flat plate portion 7a of the bracket 7 receives this moment load in the plane direction. Therefore, it is possible to suppress the occurrence of breakage due to buckling deformation in the undercut portion 4, and to crush the front end of the front side member 10 in a bellows shape, thereby improving the efficiency of absorbing the collision energy.

In this embodiment, the foam sheets 8 are adhered to both sides of the flat plate portion 7a of the bracket 7, but a plurality of foam sheets 8 are adhered to only one surface of the flat plate portion 7a as shown in FIG. At the same time, a hole 11 may be provided between the bonding portions of the foam sheet 8. By doing so, the number of the foam sheets 8 can be reduced and the labor of bonding can be omitted, but since the foam sheets 8 pass through the holes 11 and go to the back side during foaming, there is no problem in filling the foam material 9.

Alternatively, as shown in FIG. 8, a plurality of foamed sheets 8 may be alternately adhered to both sides of the flat plate portion 7a, and elongated holes 12 extending vertically may be provided between the adhered portions of the foamed sheets 8. Good. By doing so, the foam sheet 8
Not only does the number of the holes decrease, but it is not necessary to increase the length of the elongated hole 12, and a decrease in strength can be suppressed.

FIGS. 9 to 13 show a second embodiment of the present invention.

The front side member 10 of this embodiment is
In the vicinity of the joint of the bracket 3 on which the engine 13 is mounted, there is a recess 4 on the side surface to avoid interference with the tire 13. Also, in the closed cross section 20 of the front side member 10, the bracket 7 is disposed so as to straddle the scoring portion 4 as in the first embodiment, but the flat plate portion 7a is provided.
It is oriented transversely so as to intersect with the recess 4. The other components are configured in the same manner as in the first embodiment, and thus are denoted by the same reference numerals and description thereof will be omitted.

In the front side member 10 of this embodiment, since the axis L _{1 at the} front end and the axis L ₂ of the scooping portion 4 are offset by S, the front side member 1 is not affected by a frontal collision.
When a load F is applied to the front side member 0 from the front, a moment M (= FS) that causes the front side member 10 to buckle laterally at the undercut portion 4 (see FIG. 13). However, since the flat plate portion 7a of the bracket 7 is arranged in the lateral direction so as to intersect with the undercut portion 4, the flat plate portion 7a of the bracket 7 receives this moment load in the surface direction. For this reason, the occurrence of breakage due to the buckling deformation in the undercut 4 can be suppressed, and the front end of the front side member 10 can be crushed in a bellows shape to improve the efficiency of absorbing the collision energy.

The present invention relates to a front side member 10.
Even if the present invention is applied to a reinforcement structure near the door waistline of the center pillar 14 as shown in FIG. 14, similar effects can be expected with a similar configuration.

[0023]

According to the present invention, since a foam sheet is adhered to a bracket which is smaller than a body frame member and foamed, rust prevention treatment before the body assembly becomes possible at the component level.
The foaming material can be filled in the vehicle body frame member without generating any unrust-proofed portions.

Further, since the foamed region of the foamed sheet is separated by the partition wall of the bracket inside the frame member of the vehicle body, the expansion ratio of the foamed sheet, that is, the cured density can be controlled.

According to the second aspect of the present invention, the bracket 7 functions as a tension member against a moment that causes the front side member to buckle at the scooping portion in the event of a frontal collision. The occurrence of breakage due to deformation can be suppressed, and the front end of the front side member can be crushed in a bellows shape, thereby improving the efficiency of absorbing collision energy.

According to the third aspect of the present invention, the bracket is also subjected to a rust prevention treatment, and the rust prevention effect is enhanced.

According to the structure of the fourth aspect, the number of adhered foam sheets can be reduced, and labor can be saved.

According to the structure as described in claim 5, not only the number of adhered foam sheets is reduced, but also it is not necessary to increase the size of the holes, and a decrease in strength can be suppressed.

According to the sixth aspect of the present invention, the foaming material is filled in a portion of the front side member which forms the curving portion, which is advantageous in strength.

[Brief description of the drawings]

FIG. 1 is a side view showing a reinforcing structure according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1 when the foam sheet of the embodiment is not foamed.

FIG. 3 is a sectional view taken along line AA of FIG. 1 when a foam sheet is foamed.

FIG. 4 is an exploded perspective view of the embodiment.

FIG. 5 is an exemplary view for explaining an assembly procedure according to the embodiment;

FIG. 6 is a view for explaining an effect diagram of the embodiment.

FIG. 7 is a view showing a modification of FIG. 4;

FIG. 8 is a view showing another modification of FIG. 4;

FIG. 9 is a top view showing a reinforcing structure according to a second embodiment of the present invention.

FIG. 9 shows a foam sheet according to the same example when the foam sheet is not foamed.
BB sectional drawing of FIG.

FIG. 11 is a sectional view taken along the line BB of FIG. 9 when the foam sheet of the embodiment is foamed.

FIG. 12 is an exploded perspective view of the embodiment.

FIG. 13 is a view for explaining an effect diagram of the embodiment.

FIG. 14 is a perspective view showing an application portion of a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Side member panel 2 ... Closing plate 7 ... Bracket 7c ... Partition part 8 ... Foam sheet 9 ... Foam material 10 ... Front side member 20 ... Closed cross section

Claims (6)

[Claims] 1. A reinforcement of a vehicle body frame member which is filled with a foaming material which foams by receiving heat from a drying line in a rust prevention process of a vehicle body in a closed sectional space of a vehicle body frame member composed of an outer panel and an inner panel. In the structure, a bracket to which a foamed sheet is fixed is disposed along the longitudinal direction inside the body frame member, and partition walls for partitioning the inside of the body frame member are provided at both ends of the bracket. Reinforcement structure. 2. The vehicle body skeletal member according to claim 1, wherein the vehicle body skeletal member is a front side member having an undercut, and the bracket is disposed in a direction intersecting the undercut. Construction. 3. The reinforcing structure for a body frame member according to claim 1, wherein a rust-proofing treatment is applied to a foam sheet fixing surface of the bracket. 4. A plurality of foam sheets are fixed to one side of the bracket in the longitudinal direction, and holes are provided between fixing portions of the foam sheets so that the foam sheets can pass through at the time of foaming. The reinforcing structure for a vehicle body skeleton member according to claim 1. 5. A plurality of foam sheets are alternately fixed on both sides of the bracket in the longitudinal direction, and holes are provided between fixing portions of the foam sheets such that the foam sheets can pass through at the time of foaming. The reinforcing structure for a vehicle body skeleton member according to claim 1, wherein: 6. The reinforcing structure for a vehicle body frame member according to claim 2, wherein the bracket is disposed so as to straddle the scooping portion of the front side member.