JPH0569780A - Trim structure - Google Patents

Abstract

PURPOSE:To improve energy absorption characteristics. CONSTITUTION:In the trim basic material 26 of a door trim 10, plural small spheres and hollow balloons 28 are mixed. The balloons 28 are made of any of glass, steel and resin. With this constitution, when a prescribed load is applied to the door trim 10, the balloons are crushed to absorb energy. Since the balloons 28 are mixed at the time of forming the resin of the trim basic material 26, it is possible to mix them with a prescribed distributed density even for any shape of the trim basic material. It is also possible to improve energy absorption characteristics because the mixing amount of the balloons 28 and so forth can be set at a desired value easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trim structure provided with a trim base material which is arranged on a surface of an arbitrary outer wall portion of a vehicle on the vehicle interior side.

[0002]

2. Description of the Related Art A trim structure, for example, a door trim structure for an automobile, provided with a cushioning material has already been devised (see, for example, Japanese Utility Model Laid-Open No. 1-144112).

As shown in FIG. 3, this door trim 1
Reference numeral 00 denotes a core plate 104 disposed on the vehicle interior side of the side door 102, and a core plate 104 disposed on the vehicle interior side surface of the door inner panel 102A and a cushioning property disposed on the vehicle interior side surface of the core plate 104. And a covering member 106 having Further, a recess 112 that bulges toward the vehicle interior is formed at a position within the range before and after the forward and backward movement limit position of the seat 108 at the upper end of the door trim 100 and at a position facing the substantially center of the side portion 110A of the seat back 110. The recess 112 is filled with a urethane pad 114 having a predetermined hardness as a cushioning material.

In the door trim 100 having the above structure, the urethane pad 114 is plastically deformed to absorb the secondary load acting on the door trim 100 from the occupant when a high load acts on the side door 102, that is, energy. It is like this.

[0005]

However, in the above structure, in order to improve the energy absorption characteristics, it is necessary to fill and arrange the urethane pad 114 so that no gap is created between the recess 112 and the urethane pad 114. is there. Therefore, when the high hardness urethane pad is filled and arranged on the core plate provided with the complicated unevenness, it is difficult to fill and arrange it without a gap, and it is difficult to improve the energy absorption characteristics of the door trim.

In view of the above facts, the present invention has an object to obtain a trim structure which can easily improve the energy absorption characteristics.

[0007]

SUMMARY OF THE INVENTION A trim structure according to the present invention includes a trim base material disposed on a surface of an arbitrary vehicle outer wall portion on the vehicle interior side, and plastic deformation or brittleness mixed in the trim base material. A hollow and granular energy absorber that is destroyed.

[0008]

According to the trim structure of the present invention, the energy absorber has a hollow and granular shape that undergoes plastic deformation or brittle fracture, and the energy absorber is mixed during molding of the trim base material. Therefore, the energy absorber can be mixed in regardless of the shape of the trim base material after molding, and the energy absorption characteristics are easily improved due to the shape of the trim base material. Moreover, since the energy absorber is granular, it is possible to easily set the mixing amount, the distribution state, and the like. Therefore, the energy absorption characteristics can be improved easily and surely. Furthermore, since the energy absorber is hollow, it is possible to reduce the weight of, for example, a door trim to which the trim structure according to the present invention is applied.

[0009]

1 shows a door trim 10 to which a trim structure according to the present invention is applied. Door trim 10
Is attached to the vehicle interior side (front seat 34 side) of the inner panel of the front door 11 as an arbitrary vehicle outer wall portion. 2 and 1, arrow FR indicates the vehicle front side, arrow UP indicates the vehicle upper side, and arrow IN indicates the vehicle interior side, respectively.

An armrest 12 is provided at an intermediate portion of the door trim 10 in the vertical direction of the vehicle so as to bulge toward the inside of the vehicle. A door pocket 14 is provided on the vehicle lower side of the armrest 12, and a center ornament 16 is provided on the vehicle upper side of the armrest 12. An operating portion 18 such as a power window switch is provided on the vehicle front side of the armrest 12, and a speaker grill 20 is provided below the operating portion 18. Further, the operation unit 1
A defroster 22 is provided on the vehicle upper side of 8 to evaporate dew attached to the inner surface of the windshield glass by supplying warm air.

Now, the door trim 10 is provided with a substantially rectangular flat plate-shaped trim base 26 as shown in FIG. The trim base material 26 is formed of a thermoplastic resin (PP resin) having polypropylene as a main component and having crystallinity or an amorphous thermoplastic resin (ABS resin) made of three components of acrylonitrile, butadiene and styrene. .. The trim base material 26 may be formed of a thermosetting resin such as phenol resin.

A bulging portion 26A is formed at an intermediate portion in the vehicle vertical direction of the trim base material 26 so that the bulging portion 26A is bulged so as to have a U-shaped cross section in the vehicle width direction. It is said to be the core material. A portion of the trim base material 26 on the vehicle lower side of the bulging portion 26A is a base portion 26B that stands up along the vehicle vertical direction. An arc portion 26C that is bent in a substantially arc shape toward the outside of the vehicle compartment is formed at the vehicle upper end of the trim base material 26. Between the bulging portion 26A and the arc portion 26C, a bending portion 26D provided in the vehicle vertical direction intermediate portion is bent. A portion of the trim base material 26 between the bent portion 26D, the arc portion 26C, and the bulging portion 26A is a thick vertical portion 26E and a thin vertical portion 26F that stand up along the vehicle vertical direction.
The base portion 26B, the bulging portion 26A, and the thin-walled vertical portion 26F all have the same thickness, but the thick-walled vertical portion 26E has almost double the thickness.

The trim base material 26 has a balloon 2 as a large number of small spherical energy absorbers made of glass.
8 is mixed with a uniform distribution density. The inside of these balloons 28 is hollow. Also, the balloon 28
The mixing amount, the diameter dimension, the wall thickness dimension, and the distribution density are set so that a predetermined amount is crushed when a predetermined load is applied.

The trim base material 26 is covered with a leather skin material 30 on the surfaces of the circular arc portion 26C, the thick vertical portion 26E, the thin vertical portion 26F, the bulging portion 26A and the base portion 26B on the vehicle interior side. Has been done. The material of the skin material 30 may be a fabric.

The operation of this embodiment will be described below. First, a large number of balloons 28 are manufactured separately, and the required amount of balloons 28 is kneaded in the resin in advance. Next, this resin is poured into a mold (not shown) to mold the trim base material 26. The balloon 28 may be put in the concave portion of the mold in advance and the resin may be injected in this state. After the trim base material 26 is molded, the surface on the vehicle interior side is covered with the skin material 30 to manufacture the door trim 10 (note that the assembly of the operating portion 18 and the like is not directly related to the present invention, and therefore the description thereof is omitted. To). After that, the door trim 10
Is assembled to the surface of the inner panel of the front door 11 on the vehicle interior side.

When the shoulder portion of the occupant abuts the door trim 10 relatively weakly in a normal vehicle traveling state, the energy at this time is absorbed by the trim base material 26. Therefore, the occupant does not feel any discomfort such as pain even when hitting the door trim 10. It should be noted that the balloon 28 is not crushed when a load of this level is applied.

When another vehicle or the like comes into relatively strong contact with the front door 11 along the direction of arrow A in FIG. 1, the occupant is secondarily relatively strong against the door trim 10 along the direction of arrow B. When the contact is made, energy is absorbed by the deformation of the resin itself of the trim base material 26 and the crushing of the balloon 28 in the trim base material 26 according to the magnitude of the load.

As described above, in this embodiment, the door trim 10 is used.
Since the balloon 28 that is crushed when a predetermined load is applied is mixed into the trim base material 26 of the present invention, and the balloon 28 has a small spherical shape and can be preliminarily kneaded into the resin when the trim base material 26 is molded, the trim of the door trim 10 can be obtained. It is possible to mix the balloons 28 in the trim base material 26 with a predetermined distribution density regardless of the shape of the base material 26 having any unevenness. Therefore, the conventional high hardness urethane pad 114
It is not difficult to improve the energy absorption characteristics due to a gap as in the case of filling (see FIG. 3), that is, the energy absorption characteristics can be improved due to the shape of the trim base material 10. .

Further, the amount of the balloon 28 mixed, the diameter dimension, the wall thickness dimension, the distribution density and the like can be easily set to desired values, so that the energy absorption characteristics of the door trim 10 can be improved.

Furthermore, since the balloon 28 is hollow,
The weight of the door trim 10 can be reduced.

Although the trim structure according to the present invention is applied to the door trim 10 in this embodiment, the present invention is not limited to this, and
The present invention may be applied to a quarter trim arranged in a door vehicle.

Further, in this embodiment, the balloon 28 is made of glass, but it is not limited to this, and it may be made of steel, resin, or ceramic. Furthermore, balloons made of glass, steel, resin, and ceramic may be prepared, respectively, and appropriately combined to be mixed in the trim base material 26.

Further, in the present embodiment, the balloons 28 are uniformly mixed in the trim base material 26. However, for example, the distribution density inside the vehicle interior is increased, or the distribution density inside the thick vertical portion 26E is increased. You may change suitably, such as raising it.

[0024]

As described above, in the trim structure according to the present invention, since the energy absorber which is plastically deformed or brittlely fractures is mixed during the molding of the trim base material, the shape of the trim base material after the molding is different. Even if it seems, it is possible to mix the energy absorber, and since the energy absorber is granular, the energy absorption characteristics can be changed by changing the mixing amount, distribution status, etc. It has an excellent effect that the characteristics can be improved.

[Brief description of drawings]

1 is a sectional view taken along line 1-1 of FIG. 2 showing a door trim to which a trim structure according to the present invention is applied.

FIG. 2 is a perspective view showing a state where the door trim shown in FIG. 1 is viewed from the vehicle interior side.

FIG. 3 is a cross-sectional view corresponding to FIG. 1 showing a door trim according to a conventional example.

[Explanation of symbols]

 10 Door Trim 11 Front Door (External Wall Part of Vehicle) 12 Trim Base Material 28 Balloon (Energy Absorber)

Claims (1)

[Claims] 1. A trim base material disposed on a surface of a vehicle interior side of an arbitrary vehicle outer wall portion, and a hollow and granular energy absorber that is mixed in the trim base material and undergoes plastic deformation or brittle fracture. A trim structure characterized by having.