JP3153708B2 - Automotive trim - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trim for a vehicle, which is mounted on a panel surface on the side of a vehicle compartment, such as a door inner panel or a rear side inner panel, and which decorates the panel surface.

[0002]

2. Description of the Related Art As disclosed in Japanese Utility Model Application Laid-Open No. 2-64422, for example, an energy absorbing portion having a honeycomb structure is provided on the back surface of a trim main body as a countermeasure in the event of a side collision of a vehicle. BACKGROUND ART When an occupant moves to the side of a passenger compartment due to, for example, a side collision of a vehicle, a buckling deformation of the honeycomb-shaped energy absorbing portion absorbs collision energy to protect the occupant. ing.

[0003]

Since the energy absorbing portion has a honeycomb structure, it is difficult to release the energy absorbing portion from a resin material regardless of whether the energy absorbing portion is formed integrally with the trim body or separately. It is undeniable that the moldability deteriorates.

Further, since the energy absorbing portion has a honeycomb structure, the initial reaction force at the time of buckling deformation becomes large, and it is difficult to obtain an ideal low reaction force deformation mode. When the input acts, the energy absorbing portion receives the load in the falling direction, so that a difference occurs in the collision energy absorbing performance between the case where the collision input acts in the axial direction and the case where the collision input acts in the oblique direction. .

Further, when the above-mentioned honeycomb structure is formed of a resin material, it is necessary to increase the thickness of the partition walls of the honeycomb to a certain extent in order to reduce the initial reaction force at the time of buckling deformation. It is necessary to increase the protruding height from the rear surface of the trim body, which not only reduces the cabin space, but also causes a problem that the weight of the trim increases and goes against weight reduction of the vehicle body.

Therefore, the present invention has good moldability, and
A collision energy absorbing rib that has a low initial reaction force at the time of buckling deformation, provides an ideal deformation mode, and can exhibit excellent collision energy absorption performance even for a collision input that acts obliquely. The present invention provides a vehicle trim having the following.

[0007]

According to a first aspect of the present invention, a collision energy absorbing device is mounted on a panel surface on the side of a vehicle compartment and formed on a rear surface of a trim body for decorating the panel surface in a rectangular cylindrical shape. A first auxiliary rib piece extending from a vertex of the corner to an extension of each side wall outside the corner of the rib,
A second auxiliary rib piece extending obliquely over the end of the first auxiliary rib piece and a side wall orthogonal to the first auxiliary rib piece is integrally formed.

According to the second aspect, the rib is formed integrally with the back surface of the resin trim main body.

According to a third aspect of the present invention, the rib is formed integrally with the base plate by a resin material, and is fixed to the back surface of the trim main body via the base plate.

[0010]

According to the first aspect, the occupant inertially moves to the side of the cabin at the time of a side collision of the vehicle, or the trim main body deforms and moves together with the vehicle body panel in the direction of the cabin. Causes interference between the trim main body and the vehicle body panel, the rectangular cylindrical ribs buckle and absorb the collision energy.

Here, when the collision input acts on the rib in the axial direction, the rib is smoothly buckled and deformed in a bellows-like manner, so that the initial reaction force at the time of deformation can be suppressed to a small value. The rib pieces and the second auxiliary rib pieces also smoothly buckle and deform, and the collision energy is absorbed by the buckling deformation of these ribs and the first and second auxiliary rib pieces.

When the collision input acts obliquely, the side walls of the ribs in the direction perpendicular to the collision input line tend to fall and deform, but the first auxiliary rib piece extending in the same direction as the collision input line. And the slanted second auxiliary rib piece connected to the terminal functions as a projecting material for the side wall that tends to fall, thereby suppressing the falling deformation and causing the rib to buckle substantially appropriately. Absorbs collision energy.

On the other hand, apart from such advantages in terms of collision energy absorption characteristics, the ribs have a rectangular cylindrical shape, so that when a resin material is used for molding, the mold can be easily removed from the mold, thereby improving moldability. be able to.

Further, since the buckling deformation of the rib is performed smoothly and a sufficient deformation effective stroke can be ensured, the height of the rib protruding from the rear surface of the trim body can be kept relatively small, and the space in the vehicle compartment is not narrowed. .

According to the second aspect, since the rectangular cylindrical rib is formed integrally with the back surface of the resin trim main body, the number of parts can be reduced and the cost can be reduced.

In addition, since the ribs have a rectangular cylindrical shape and the mold can be easily removed from the mold, there is no slight adverse effect on the formability of the trim main body.

According to the third aspect, since the rectangular tubular rib is formed separately from the trim main body, the trim main body can be used commonly for the specification with ribs and the specification without ribs.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings by taking a door trim as an example.

1 to 4, reference numeral 1 denotes a resin trim main body mounted on a door inner panel Da surface by a clip (not shown) or the like, and a collision energy absorption formed in a rectangular cylindrical shape on the back surface 1a of the trim main body 1. Ribs 2 are provided.

The rib 2 is formed in the shape of a rectangular tube that is horizontally long in the front-rear direction. The rib 2 interferes with an occupant seated on a seat (not shown) due to a side collision of the vehicle or the like, and is most likely to receive a load, for example, seated on the seat. A portion corresponding to the side of the waist, which is the center of gravity of the seated occupant, is integrally formed with the back surface 1a of the trim main body 1.

Outside the corners of the rib 2, a first auxiliary rib piece 5 and a second auxiliary rib piece 6 are integrally formed.

The first auxiliary rib piece 5 extends from the vertex of the corner on the extension of each of the vertical and horizontal side walls 3 and 4, and the second auxiliary rib piece 6 is provided with each of the first auxiliary rib pieces. The terminal of the piece 5 and the first
It is formed integrally with the side walls 3 and 4 orthogonal to the auxiliary rib piece 5 so as to straddle obliquely.

In this embodiment, the first auxiliary rib piece 5 and the second auxiliary rib piece 5
Although the auxiliary rib piece 6 is formed in a triangular side surface, it may be formed in a rectangular side surface.

Here, when the rectangular vertical dimension of the rib 2 is a and the horizontal dimension is b, the second auxiliary rib piece 6 is
Dimensions c and d between the point connected obliquely to the corner vertex are
In order to obtain a reinforcing effect, it is desirable that c ≧ a ^1/3 and d ≧ b ^1/3.
It has been confirmed from experiments that if /b=0.2 to 1.0, the initial reaction force at the time of buckling deformation can be kept low and a sufficient amount of collision energy can be absorbed.

According to the structure of the above-described embodiment, the occupant inertially moves to the side of the cabin at the time of a side collision of the vehicle, or the trim main body 1 deforms and moves in the direction of the cabin together with the door inner panel Da. When the waist of the occupant interferes with the trim body 1,
The rectangular cylindrical rib 4 buckles between the trim main body 1 and the door inner panel Da to absorb the collision energy.

This is specifically described, for example, by the arrow Fa in FIG.
When the collision input acts on the rib 2 in the axial direction as shown in FIG. 5, the collision energy absorbing rib 2 is formed in a rectangular cylindrical shape, and the bellows-like buckling deformation is performed smoothly. Can be suppressed small, and the first auxiliary rib pieces 5 and the second auxiliary rib pieces 6 outside the corners are smoothly buckled and deformed with the buckling deformation of the ribs 2. 2 and first and second auxiliary rib pieces 5, 6
Absorbs the collision energy by the buckling deformation.

When a collision input acts on the rib 2 obliquely as shown by an arrow Fb in FIGS. 3 and 4, the side wall of the rib 2 in a direction perpendicular to the collision input line, that is, in this example, in the lateral direction Side walls 4 and 4 have a tendency to collapse and deform,
The first auxiliary rib pieces extending in the same direction as the collision input line, in this example, the first auxiliary rib pieces 5 and 5 extending from the side walls 3 and 3 in the vertical direction, and obliquely provided at their ends. The second auxiliary rib pieces 6 and 6 function as a projecting member for the side walls 4 and 4 that tend to fall, thereby suppressing the falling deformation of the side walls 4 and 4 and causing the rib 2 to buckle and deform appropriately. Absorb energy.

Accordingly, good energy absorption performance can be obtained for any of the collision input of the axial input and the oblique input, and the occupant can be protected safely.

According to an experiment conducted by the present inventors, when a collision input acts obliquely on a horizontally long rectangular cylindrical rib having no first auxiliary rib piece and no second auxiliary rib piece at the corner, FIG. The deformation mode at the time of inputting in the axial direction shown by the line b is changed to the deformation mode shown by the line c in the same figure. Although the energy absorption performance is greatly reduced, even in the same diagonal direction input, in the case where the same first auxiliary rib piece and second auxiliary rib piece as in the above embodiment are provided outside the corners of the rib, a in FIG.
It has been confirmed that the deformation mode indicated by the line enables to obtain excellent performance asymptotic to the collision energy absorption performance when a collision input acts on a normal rectangular cylindrical rib in the axial direction.

On the other hand, apart from such a collision energy absorbing performance, since the rib 2 is formed in a rectangular cylindrical shape that is easy to cut out from the shape, the rib 2 is integrally formed on the back surface 1a of the trim main body 1. Even in this case, the moldability of the trim main body 1 is not adversely affected, and the moldability can be improved, which can greatly contribute to cost reduction.

As described above, since the buckling deformation of the rib 2 is performed smoothly and a sufficient deformation effective stroke can be ensured, the protrusion height of the trim body 1 from the back surface 1a can be kept relatively small. It does not narrow the cabin space.

In the above embodiment, the rib 2 is formed integrally with the rear surface of the trim main body 1. However, the rib 2 is formed separately from the trim main body 1 so as to be fixed to a required portion of the rear surface 1a of the trim main body 1. You may.

For example, the trim main body denoted by reference numeral 1 in FIGS. 2 and 3 is replaced with a base plate 10 made of resin, and the rib 4 is integrated with the base plate 10 together with the first auxiliary rib piece 5 and the second auxiliary rib piece 6. What is necessary is just to shape | mold.

In this case, since the trim main body 1 and the rib 2 are separate bodies, there is an advantage that the trim main body 1 can be commonly used for the specification with ribs and the specification without ribs.

In the above-described embodiment, an example is shown in which one rectangular cylindrical rib 2 is provided at a required portion on the back surface of the trim main body 1. However, it is needless to say that a plurality of ribs 2 are collectively arranged at the required portion. Thus, the collision energy absorption amount may be increased.

[0036]

According to the present invention, the following effects can be obtained.

(1) Since the rib provided on the back surface of the trim body is formed in a rectangular cylindrical shape, when a collision input acts on the rib in the axial direction at the time of a side collision of the vehicle, the rib is formed in a bellows shape. Buckling deformation is performed smoothly, the initial reaction force during deformation can be suppressed to a small value, and the first auxiliary rib piece and the second auxiliary rib piece provided outside each corner of the rib can be smoothly buckled and deformed. As a result, the buckling deformation of these ribs and the first and second auxiliary rib pieces can absorb the collision energy and protect the occupant safely.

(2) The first auxiliary rib piece extends from the vertex of the corner of the rib on the extension of each side wall, and the second auxiliary rib piece is connected to the end of the first auxiliary rib piece and the first auxiliary rib piece. Since it is formed integrally with the side wall orthogonal to the oblique direction, when the collision input acts on the rib from an oblique direction, the side wall of the rib in the direction orthogonal to the collision input line tends to fall down, The first auxiliary rib piece extending in the same direction as the collision input line and the slanted second auxiliary rib piece connected to the end of the first auxiliary rib piece function as a projecting material for the side wall which tends to fall down. It is possible to suppress the collapsing deformation, absorb the collision energy by buckling the rib approximately appropriately, and exhibit an excellent collision energy absorption effect even for an oblique collision input.

(3) Since the ribs are formed in a rectangular cylindrical shape,
In the case of molding with a resin material, the molding die can be easily removed, moldability can be improved, and cost can be reduced.

(4) Since the rib is formed in a rectangular cylindrical shape so that the buckling deformation can be performed smoothly, the deformation effective stroke of the rib can be sufficiently ensured, and therefore, the protrusion height from the rear surface of the trim main body can be reduced. Can be kept relatively small,
It does not narrow the cabin space.

(5) By integrally forming the ribs on the back surface of the resin trim main body, the number of parts and the number of parts management steps can be reduced, which can greatly contribute to cost reduction.

(6) When the ribs are integrally formed on the back surface of the trim main body, the ribs are formed in a rectangular cylindrical shape, so that the molding die can be easily removed. Never.

(7) The rib is integrally formed with the base plate,
By forming the ribs separately from the trim main body so as to be fixed to the back surface of the trim main body via the base plate, the trim main body can be shared between the specification with ribs and the specification without ribs, thereby reducing costs. Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view of a trim main body according to an embodiment of the present invention as viewed from the back side.

FIG. 2 is an enlarged perspective view of a main part of the embodiment.

FIG. 3 is a side view of the rib of the embodiment.

FIG. 4 is a view taken in the direction of the arrow A in FIG.

FIG. 5 is a graph showing a collision energy absorption characteristic of a rib.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Trim main body 2 Rib 3, 4 Side wall 5 First auxiliary rib piece 6 Second auxiliary rib piece

Continuation of front page (72) Inventor Akira Kawai Nissan Motor Co., Ltd. 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture (58) Field surveyed (Int. Cl. ⁷ , DB name) B60J 5/00 B60R 13/02 B60R 21/02 B60R 21/04

Claims (3)

(57) [Claims] 1. A rectangular cylinder-shaped rib for absorbing collision energy is provided on a rear surface of a trim body which is mounted on a panel surface on a side portion of a vehicle compartment and decorates the panel surface, and a corner of the rib is provided. A first auxiliary rib piece extending outwardly from the vertex of the corner on the extension of each side wall, and a second auxiliary obliquely straddling a terminal of the first auxiliary rib piece and a side wall orthogonal to the first auxiliary rib piece. An automotive trim characterized by being integrally formed with a rib piece. 2. The automotive trim according to claim 1, wherein the rib is formed integrally with the back surface of the resin trim body. 3. The trim according to claim 1, wherein the rib is formed integrally with the base plate by a resin material, and is fixed to the back surface of the trim body via the base plate.