JPH11180236A - Attachment structure of energy absorbing material on upper part of car body - Google Patents

Abstract

(57) [Summary] [Problem] To mount an energy absorbing material on an upper part of a vehicle body, which can prevent a lattice-shaped energy absorbing material from slipping against a structural member and can secure sufficient deformation of the energy absorbing material. Providing structure. The energy absorbing material (22) is formed integrally with at least one longitudinal rib (32) extending substantially longitudinally along the structural member (14) and intersects the longitudinal rib. A plurality of lateral ribs (34) extending in the direction;
Mounting seat (3) for fixing the energy absorbing material to the structural member
6) and a holding seat (38) formed so as to be in contact with the flange joint portion (28) to which the weather strip (20) is attached and held by the holding portion (18) of the weather strip.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting an energy absorbing member on an upper portion of a vehicle body of an automobile, and more particularly to pillars, roof side rails and other structural members extending in a longitudinal direction, and from the structural members to a vehicle interior. The present invention relates to a structure for attaching the energy absorbing material to an upper portion of a vehicle body, which includes an interior material arranged at an interval and an energy absorbing material arranged within the interval.

[0002]

2. Description of the Related Art Various structures have been proposed and put into practical use, in which an energy absorbing material is disposed within a space between a structural member and an interior material, and the energy absorbing material is deformed to absorb impact energy. . As one of them, there is one in which the energy absorbing material is made of a grid-like resin composed of vertical ribs and horizontal ribs. According to this lattice-shaped energy absorbing material, the desired energy absorption characteristics can be relatively easily obtained by selecting the thickness, quantity, pitch, and the shape of the connecting portion between the vertical ribs and the horizontal ribs. It can be obtained.

Incidentally, a structural member having an energy absorbing material disposed inward generally has a high rigidity, and this rigidity obtains a closed cross-sectional structure of an inner panel and an outer panel, and a large section modulus or a second moment of area. And the cross-sectional shapes of the inner panel and the outer panel. The cross-sectional shape of each panel is formed by press forming of the panel, and a hole for fixing the energy absorbing material is punched in the inner panel simultaneously with the press forming.
As a result, the position of the hole for fixing the energy absorbing member is limited because the position of the hole is restricted by the direction in which the press die is removed.

[0004]

The above-mentioned problem can be solved by increasing the number of press forming steps or adding a punching step. However, in this case, one more step is required, and the workability is affected. Is affected. Therefore, the energy absorbing material is attached using the holes at the limited positions. In particular, in the case of the lattice-shaped energy absorbing material, the contact surface between the energy absorbing material and the inner panel is small. When an impact load is applied to a part far from the mounting position of the energy absorbing material due to low frictional resistance, the energy absorbing material slides against the inner panel of the structural member, and the energy absorbing material cannot be sufficiently deformed. Can occur.

In the energy absorbing structure proposed separately in view of the above (Japanese Patent Application No. 9-19678), a projection is projected from the outer surface of the interior material facing the energy absorbing material, and the projection is formed in the space of the lattice-shaped energy absorbing material. To restrain the energy absorbing material. However, even with this constraint, the contact surface between the energy absorbing material and the inner panel of the structural member does not change, so that the frictional resistance of the energy absorbing material is still small.

The present invention provides a structure for mounting an energy absorbing material on an upper portion of a vehicle body, which prevents a lattice-shaped energy absorbing material from slipping against a structural member and ensures sufficient deformation of the energy absorbing material. provide.

[0007]

According to the present invention, there is provided a structural member which is formed in a closed cross-sectional structure by joining two flanges of an inner panel and an outer panel and which extends in a longitudinal direction, and the inner panel of the structural member. And a weatherstrip attached to at least one of the two flange joints of the structural member, the weatherstrip having a clamping portion sandwiching the flange joint. And an energy absorbing material made of resin, which is disposed in the space, and the energy absorbing material is attached to an upper portion of a vehicle body of an automobile. The energy absorbing material includes at least one vertical rib extending substantially in the longitudinal direction along the structural member, and a plurality of horizontal ribs formed integrally with the vertical rib and extending in a direction intersecting the vertical rib. A mounting seat for fixing the energy absorbing material to the structural member, and formed to be in contact with the flange joint to which the weather strip is mounted;
And a holding seat sandwiched between the sandwiching portions of the weather strip.

[0008]

[Operation and Effect] The energy absorbing material is attached to the structural member by tapping screws, clips or other attachments penetrating the mounting seat, and further, the holding seat is attached to the structural member in a state where the holding seat is sandwiched by the clamping portions of the weather strip. Can be

Since the energy absorbing member is fixed to the structural member by fixing it at two places by the mounting seat and the holding seat, the mounting is firm. As a result, when an impact load is applied to a portion distant from the mounting seat, the structural member does not slip on the inner panel, but is sufficiently deformed to absorb impact energy. Further, since the energy absorbing material itself has a holding seat and the holding seat is sandwiched and attached by the originally provided sandwiching portion of the weather strip, the number of parts is not increased.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1 showing a sectional state of an energy absorbing material mounting structure and FIG. 2 showing a perspective state of the energy absorbing material, two flanges 11A of an inner panel 10 and an outer panel 12 are shown. And 13A, 11
B and 13B are joined together to form a closed cross-sectional structure, and a structural member 14 extending in the longitudinal direction; and an interior material 16 disposed at a distance D from the inner panel 10 of the structural member 14 toward the vehicle interior; A weather strip 20 attached to at least one of the two flange joints of the structural member 14 and having a clamping portion 18 sandwiching the flange joint, and a resin energy absorbing member disposed within the interval D The energy absorbing member 22 is attached to the upper part of the body of the automobile including the member 22.

In the embodiment shown, the structural member 14 is a front pillar and extends in the vertical direction. In other words, the closed cross-sectional structure in FIG. The reinforcing panel 24 is disposed between the inner panel 10 and the outer panel 12, and its flange is overlapped and joined to the flanges of the inner panel 10 and the outer panel 12.

The interior material 16 is a pillar garnish made of a hard resin, and is located at a distance D from the inner panel 10 toward the vehicle interior. Although the size of the interval D varies everywhere, it can be set in a range of approximately 10 to 30 mm.

The weather strip 20 is made of rubber and has a holding portion 18 and a sealing portion 19. In the illustrated embodiment, since the structural member 14 is a front pillar,
Among the two flange joints 26 and 28 of the structural member 14, a windshield glass is disposed on the front flange joint 26. On the other hand, since the rear flange joint 28 has a door, the weather strip 20 is attached to the rear flange joint 28 to perform a door sealing function. The sandwiching portion 18 of the weather strip 20 has an insert 30 made of a steel plate and having a U-shaped cross section. The elastic joint of the rubber lip which covers the inside of the insert 30 sandwiches the flange joining portion 28, Joint 2
8 attached. The present invention utilizes the elasticity of the holding portion 18 of the weather strip.

The energy absorbing material 22 includes at least one longitudinal rib 32 extending substantially longitudinally along the structural member 14 and is formed integrally with the longitudinal rib 32.
A plurality of horizontal ribs 34 extending in a direction intersecting with a mounting member 36 for fixing the energy absorbing material 22 to the structural member 14.
And a holding seat 38 formed so as to be in contact with the flange joint portion 28 to which the weather strip 20 is attached, and held by the holding portion 18 of the weather strip.

In the illustrated embodiment, the energy absorbing material 22 is formed of a hard resin separately from the interior material 16,
A longitudinal rib 32 of the strip is provided. The vertical ribs 32 and the horizontal ribs 34 are preferably formed such that the larger number, that is, the horizontal ribs shear or buckle with respect to the vertical ribs. Are arranged in a lattice so as to define a space penetrating at right angles.

On the other hand, the mounting seat 36 and the holding seat 38
Is formed in a lid shape or a bottom shape so as to prevent penetration. That is, it extends in a direction intersecting the vertical ribs 32 and the horizontal ribs 34 on the inner panel 10 side, and faces the inner panel 10. The mounting seat 36 includes the vertical rib 32 and the horizontal rib 3.
4 is sufficient, but the holding seat 38 is formed larger than the mounting seat 36 so as to traverse several spaces, and furthermore, the shape of the inner panel 10 is substantially equal to that of the inner seat 10. It is bent to match. The side 39 of the holding seat 38 along the flange joint 28 is chamfered. Thus, when the holding portion 18 of the weather strip 20 and the flange joint portion 28 hold the holding seat 38 together, it is possible to ensure ease of holding.

The vertical ribs 32 and the horizontal ribs 34 are 1 to 3
It can be formed to a thickness of mm. On the other hand, the thickness t of the mounting seat 36 is about 5 mm, and the holding seat 38 has an intermediate thickness. This is for the following reason. The mounting seat 36 is mounted and fixed to the inner panel 10 by a fixing tool 40 such as a tapping screw. When a load more than a predetermined value is applied in this mounting state, stress concentration occurs near the fixture 40 and the mounting seat 36 may be broken, but this break occurs before the vertical ribs 32 and the horizontal ribs 34 are deformed. Then, the intended amount of energy cannot be absorbed. By increasing the thickness of the mounting seat 36, it is possible to prevent the mounting seat 36 from being broken and to achieve a predetermined energy absorption.
On the other hand, when the load 42 in the A direction is applied to the energy absorbing material 22 via the interior material 16, the holding seat 38 has a thickness necessary to prevent the energy absorbing material 22 from being deformed due to a tensile force from the load 42. This prevents the energy absorbing material 22 from slipping with respect to the inner panel 10,
And, the deformation of the lateral rib 34 is surely caused. For this purpose, a plurality of reinforcing ribs 44 can be provided at the bent portion of the holding seat 38 as shown by phantom lines in FIG.

The energy absorbing member 22 allows the fixture 40 to pass through the mounting seat 36, and fixes the fixture 40 by grommets 46 inserted into corresponding holes of the inner panel 10.
It is attached to the inner panel 10. After that, the weather strip 20 is attached to the inner panel 10 with the flange joining portion 28 and the holding seat 38 being sandwiched by the holding portion 18.

In the above embodiment, the energy absorbing material 22 is formed separately from the interior material 16. Therefore, since the shapes, directions, and the like of the vertical ribs 32 and the horizontal ribs 34 of the energy absorbing member 22 can be selected independently of the interior material 16, the degree of freedom in designing the energy absorbing member 22 can be increased. In this case, the interior material 16 is directly
0 or attached to the energy absorbing material 22.

In the embodiment shown in FIG.
Is a center pillar formed by joining two flanges of the inner panel 50 and the outer panel 52 to form a closed cross-sectional structure and extending in the longitudinal direction. A pillar garnish 56 is arranged at a distance D from the inner panel 50 toward the vehicle interior, and a weather strip 62 is attached to each of the two flange joints 58 and 60 of the structural member 54. The weather strip 62 integrally has a holding portion 64 for holding the flange joints 58 and 60 and a sealing portion 65.

An energy absorbing material 66 made of resin is arranged within the interval D. The energy absorbing material 66 is
Four longitudinal ribs 6 extending substantially longitudinally along
8 and the vertical ribs 68 are formed integrally with the vertical ribs 68.
A plurality of lateral ribs 70 extending in a direction intersecting with the mounting member 72 for fixing the energy absorbing member 66 to the structural member 54;
And the two holding seats 7 formed so as to be in contact with the flange joining portions 58 and 60 to which the weather strip 62 is attached, and sandwiched by the holding portions 64 of the weather strip 62.
And 4. That is, in this embodiment, the structural member 5
Since 4 is a center pillar, two holding seats 74 are provided, the front holding seat 74 is in contact with the front flange joint 58, and the rear holding seat 74 is in contact with the rear flange joint 60. The holding seat 74 is held by the holding portion 64 of the weather strip 62 together with the flange joint portion, and is attached to the structural member 54.

In the above embodiment, the structural member is a pillar. In the case of the front pillar, one holding seat is provided on the energy absorbing material, and in the case of the center pillar, two holding seats are provided on the energy absorbing material. ing. If the structural member is a rear pillar or a roof side rail, one holding seat can be provided on the energy absorbing material.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view cut along a horizontal plane, showing an embodiment of a structure for mounting an energy absorbing material on an upper part of a vehicle body of an automobile according to the present invention.

FIG. 2 is a perspective view of the energy absorbing member, in which a holding seat is shown with a cross hatch for convenience of explanation.

FIG. 3 is a cross-sectional view cut along a horizontal plane, showing another embodiment of the mounting structure of the energy absorbing material on the upper part of the body of the automobile according to the present invention.

[Explanation of symbols]

 10, 50 Inner panel 12, 52 Outer panel 14, 54 Structural member 16, 56 Interior material 18, 64 Nipping part 20, 62 Weather strip 22, 66 Energy absorbing material 32, 68 Vertical rib 34, 70 Lateral rib 36, 72 Mounting Seats 38, 74 Holding seats

Claims (1)

[Claims] 1. A closed cross-sectional structure formed by joining two flanges of an inner panel and an outer panel, respectively.
A structural member extending in the longitudinal direction, an interior material arranged at a distance from the inner panel of the structural member toward the vehicle interior, and a weather attached to at least one of two flange joints of the structural member A structure for attaching the energy absorbing material to an upper portion of a vehicle body, comprising a weather strip having a sandwiching portion sandwiching a flange joint portion, and a resin energy absorbing material disposed in the space. The energy absorbing member includes at least one longitudinal rib extending substantially in the longitudinal direction along the structural member, and a plurality of horizontal ribs formed integrally with the longitudinal rib and extending in a direction intersecting with the longitudinal rib. A mounting seat for fixing the energy absorbing material to the structural member and a flange joint to which the weather strip is mounted. And a holding seat sandwiched between the sandwiching portions of the weather strip.