JP2002079899A - Trim for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve moldability of a trim body having a collision energy absorbing rib, and to improve a collision energy absorbing effect. SOLUTION: A required part on the reverse 1a of the trim body 1 is provided with the collision energy absorbing rib 4 formed in a multistage shape by separately molding a first energy absorbing part 5 and a second energy absorbing part 6 by making the rib wall number different between a front stage part and a rear stage part with a rectangular cylindrical shape as a basic shape.

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.

In addition, since the energy absorbing portion has a honeycomb structure, the initial reaction force at the time of buckling deformation becomes large, and it becomes difficult to obtain an ideal low reaction force deformation mode.

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
An object of the present invention is to provide a trim for an automobile having a collision energy absorbing rib capable of obtaining an ideal deformation mode with a low initial reaction force at the time of buckling deformation.

[0007]

According to a first aspect of the present invention, a front surface of a trim body which is mounted on a panel surface on a side of a vehicle compartment and has a rectangular cylindrical shape as a basic shape is provided on a back surface of a trim body which decorates the panel surface. A first energy absorbing portion and a second energy absorbing portion formed in multiple stages by providing different numbers of rib walls between a portion and a rear portion, wherein a rib for impact energy absorption is provided.
The energy absorbing section and the second energy absorbing section are separately formed, and the first energy absorbing section and the second energy absorbing section are connected in abutting manner.

[0008]

According to the first aspect of the present invention, the occupant inertially moves to the side of the cabin during 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. When the rib interferes with the trim main body and a collision load acts on the rib on the rear surface of the trim main body in the axial direction, the rib buckles between the trim main body and the vehicle body panel to absorb collision energy.

At this time, the ribs for absorbing the collision energy are formed in a rectangular cylindrical basic shape, and the bellows-like buckling deformation is performed smoothly, so that the initial reaction force at the time of the deformation can be suppressed. .

In addition, since the rib has the first energy absorbing portion and the second energy absorbing portion having different numbers of rib walls formed in multiple stages, the amount of collision energy absorption can be arbitrarily adjusted, and the optimum collision energy absorption can be achieved. Properties can be obtained.

In addition to the above advantages in terms of collision energy absorption characteristics, the ribs have a rectangular cylindrical basic shape, so that when a resin material is used for molding, the molding die can be easily removed. Can be improved.

Furthermore, since the ribs can smoothly buckle and have a sufficient deformation effective stroke, the height of the ribs protruding from the rear surface of the trim body can be kept relatively small, and the space in the cabin is not reduced. .

Further, since the first energy absorbing portion and the second energy absorbing portion of the rib are formed separately, the formability can be further improved, and the amount of collision energy absorption of the rib can be easily adjusted. Can be.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail by taking a door trim as an example.

FIGS. 1 to 4 show a rib structure considered in the process leading to the present invention. Reference numeral 1 denotes a resin trim attached to a door inner panel Da of a door body D by a clip or the like (not shown). An armrest 2 is formed in a substantially central portion of the main body so as to bulge toward the vehicle compartment side, and a pocket portion 3 is provided on a lower side portion.

The rear surface 1a of the trim main body 1 is provided with a rib 4 for absorbing collision energy.

The rib 4 interferes with an occupant seated in a seat (not shown) due to a side collision of the vehicle or the like, and is most susceptible to load.
For example, a part corresponding to the side of the waist, which is the center of gravity of the occupant sitting on the seat, is integrally formed on the back surface of the trim main body 1.

The rib 4 has a basic shape of a rectangular tube, and the first energy absorbing portion 5 and the second energy absorbing portion 6 are formed by making the number of rib walls different between the front and rear portions. It is formed in multiple stages.

In the example shown in FIGS. 1 to 3, the first energy absorbing portion 5 is provided with upper and lower rib walls 7, 7 on the outer periphery and front and rear rib walls 8,
8 and two partitioning rib walls 9 and 10 provided crosswise on the inside to form a grid, while the second energy absorbing portion 6 is formed by the front and rear rib walls 8 and 8 described above. When,
The partition rib walls 9 and 10 are formed by the front and rear rib walls 8 and 8 and the parallel rib wall 10.

That is, the second energy absorbing portion 6 has a structure in which the upper and lower rib walls 7, 7 of the first energy absorbing portion 5 and the rib wall 9 for partitioning are removed. A slide die provided in a molding die (not shown) can easily be formed integrally with the first energy absorbing portion 5.

According to the rib structure shown in FIGS. 1 to 3, 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 is deformed in the cabin direction together with the door inner panel Da. When the occupant's waist and the trim main body 1 interfere with each other and an impact load acts on the rib 4 in the axial direction, the rib 4 buckles and deforms between the trim main body 1 and the door inner panel Da. The buckling deformation of the rib 4 absorbs the collision energy.

Here, since the ribs 4 are formed in a rectangular cylindrical shape as a basic shape, the ribs 4 are smoothly buckled and deformed in a bellows shape by the axial collision load, and the initial reaction force at the time of deformation is suppressed to a small value. And the collision energy can be efficiently absorbed.

Moreover, this rib 4 is a first rib having a large number of rib walls.
Since the energy absorbing portion 5 and the second energy absorbing portion 6 having a small number of rib walls are formed in multiple stages before and after, the collision energy absorption between the first energy absorbing portion 5 and the second energy absorbing portion 6 is large. The total energy absorption can be adjusted optimally by making the number of rib walls different.

In particular, the second energy absorbing portion 6 can be formed by changing the thickness of the rib walls 8, 8 and the rib wall 10 from the first energy absorbing portion 5 by a slide die (not shown). In addition, the adjustment of the collision energy absorption amount can be more easily performed.

On the other hand, apart from such a collision energy absorbing performance, the rib 4 is formed in a rectangular cylindrical shape whose basic shape is easy to be die-cut, so that the rib 4 is provided on the back surface 1a of the trim main body 1. Even in the case of integral molding, there is no slight adverse effect on the moldability of the trim main body 1, and the moldability can be improved and can greatly contribute to cost reduction.

Further, since the buckling deformation of the rib 4 is performed smoothly and the effective deformation stroke can be sufficiently secured as described above, the height of the rib 4 projecting from the rear surface of the trim main body 1 can be suppressed to a relatively small value. It does not reduce the indoor space.

As described above, in the example shown in FIGS.
Is integrally formed on the back surface of the trim main body 1. As shown in FIG. 4, the ribs 4 are integrally formed on the base plate 11 with a resin material, and the ribs 4 are separately formed from the trim main body 1. It may be fixed to a required portion of the back surface 1a of the trim main body 1 with, for example, a screw 12 or the like.

In the example shown in FIG. 4, the first energy absorbing portion 5 formed in a lattice shape with two partitioning rib walls 9 and 10 crossing in a cross shape on the inner side is provided on the base plate 1.
The first energy absorbing portion 6 is formed at the rear stage of the rib 4 so as to be on the first side, and the second energy absorbing portion 6 at the front stage is formed as a simple rectangular cylinder without the rib walls 9 and 10. The front and rear positions of the portion 5 and the second energy absorbing portion 6 and the number of rib walls are arbitrarily set according to required collision energy absorbing characteristics.

As described above, by forming the trim main body 1 and the rib 4 as 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.

FIG. 5 shows an embodiment of the present invention. The basic structure of the rib 4 disposed on the back surface 1a of the trim main body 1 is the first energy absorbing portion 5 and the second energy absorbing portion 6. As in each of the examples shown in FIGS. 1-3 and 4,
In this embodiment, the first energy absorbing portion 5 and the second energy absorbing portion 6 are separately formed.

The first energy absorbing portion 5 is integrally formed with the base plate 11 in a lattice shape having two partitioning rib walls 9 and 10 crossed in a cross shape on the inside, and the second energy absorbing portion 6 is formed of a trim body. Rib walls 8A, 8A, 10A respectively corresponding to the rib walls 8, 8 before and after the first energy absorbing portion 5 and the rib wall 10 for partitioning are formed on the rear surface of 1 in parallel and integrally. .

The rib walls 8A, 8A, 10A
The first energy absorbing portion 5 is provided at the end via a base plate 11.
And the base plate 11 is fixed to a boss 13 protruding from the back surface 1a of the trim main body 1 with a screw 12.

Therefore, according to this embodiment, FIGS.
3 and FIG. 4, the first energy absorbing portion 5 and the second energy absorbing portion 6 of the rib 4 are formed separately, so that the first energy absorbing portions 5 and 5 can be formed separately. The second energy absorbing portion 6 can be easily formed into a shape having the required number of rib walls, and the formability can be further improved, and the amount of collision energy absorption can be easily adjusted.

In this embodiment, the second energy absorbing section 6
Is integrally formed on the back surface 1a of the trim main body 1, but the second energy absorbing portion 6 may also be formed separately from the trim main body 1. In this case, for example, the trim main body indicated by reference numeral 1 in FIG. May be fixed to a required portion on the back surface of the trim main body 1 with the second energy absorbing portion 6 and the first energy absorbing portion 5 abutting each other.

In the above description, an example is shown in which one rib 4 having a rectangular cylindrical shape is provided at a required portion of the back surface 1a of the trim main body 1. Of course, a plurality of ribs 4 may be provided at the required portion. The individual pieces may be arranged to increase the collision energy absorption amount.

[0036]

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

(1) Since the collision energy absorbing rib provided on the back surface of the trim main body is formed in a rectangular cylindrical shape, a collision input acts on the rib in the axial direction at the time of a side collision of a vehicle or the like. In this case, the ribs can be smoothly buckled and deformed in a bellows-like manner so that the initial reaction force can be kept small.
The occupant can be safely protected by efficiently absorbing the collision energy.

(2) Since the first and second energy absorbing portions having different numbers of rib walls are formed in multiple stages, the amount of impact energy absorption can be arbitrarily adjusted, and the optimal impact energy absorption can be adjusted. Properties can be obtained.

(3) Since the basic shape of the rib is a rectangular cylindrical shape which is easy to mold in shape, it is easy to remove the mold when molding with a resin material, thereby improving moldability. As a result, cost reduction can be achieved.

(4) Since the buckling deformation can be performed smoothly by making the basic shape of the rib a rectangular cylindrical shape, 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. It can be kept relatively small, and does not narrow the cabin space.

(5) By separately forming the first energy absorbing portion and the second energy absorbing portion of the rib, the formability can be further improved and the amount of collision energy absorption of the rib can be easily adjusted. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing a trim main body having a rib structure considered in a process leading to the present invention.

FIG. 2 is a perspective view of the trim main body shown in FIG. 1 as viewed from the back side.

FIG. 3 is an enlarged perspective view of a rib shown in FIGS.

FIG. 4 is an enlarged perspective view showing a different example of a rib structure considered in a process leading to the present invention.

FIG. 5 is an enlarged perspective view of a rib according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Trim main body 4 Rib 5 1st energy absorption part 6 2nd energy absorption part 7, 8, 9, 10 Rib wall

Continued on the front page (72) Akira Kawai, Inventor Nissan Motor Co., Ltd., 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Prefecture (72) Inventor Nobuhiko Takahashi 2F, Takaracho, Kanagawa-ku, Yokohama, Kanagawa, F-term (reference) 3D023 BA01 BA07 BB08 BB14 BB22 BC01 BD03 BE03 BE09

Claims (1)

[Claims] 1. A rectangular cylindrical shape is formed on the back surface of a trim main body which is mounted on a panel surface on a vehicle compartment side and decorates the panel surface, and the number of rib walls is different between a front part and a rear part. A collision energy absorbing rib in which a first energy absorbing portion and a second energy absorbing portion are formed in multiple stages, wherein the first energy absorbing portion and the second energy absorbing portion are separately formed, An automotive trim, wherein the first energy absorbing portion and the second energy absorbing portion are connected in abutting manner.