JPH06270678A - Automobile door trim - Google Patents

Abstract

PURPOSE:To effectively absorb a shock caused by a sidewise bump or the like, through a waist part, in an automobile door trim incorporating a core formed of a resin molding, or a waist garnish formed of a resin molding. CONSTITUTION:A height different part 51 to which shock load stress concentrates is provided to a stopper rib 50 formed on the rear surface of a west part 21 of a resin core 20 or on a waist garnish 80, a vertically long cut-out 52 is formed in a height different part 51 so as to induce buckling in the stopper rib 50 in order to absorb a shock. Further, the width and length of the cutout 52 is adjusted to control the buckling load.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile door trim, and more particularly to an automobile door trim which has improved impact absorbing performance in a waist portion.

[0002]

2. Description of the Related Art Conventionally, a door trim is installed on the interior side of a door panel for the purpose of enhancing the aesthetics of the room and protecting an occupant from an impact applied to a vehicle body.

The general structure of an automobile door trim and the structure for attaching it to a door panel will be described with reference to FIG.

First, the door trim 1 is often molded into a curved shape in terms of molding, and the surface of a core material 2 made of a resin molding molded into a required shape by injection molding or stamping molding has excellent cushioning properties. The skin material 3 is attached, and when the core material 2 is molded, the position regulating stopper ribs 5 are formed at appropriate intervals along the longitudinal direction of the vehicle.

When the door trim 1 is attached to the inner side of the door inner panel 6, the waist 4 is
The corner portion 5a of the stopper rib 5 abuts on the convex portion 6a of the door inner panel 6 to enhance the mounting stability of the door trim 1.

[0006]

As described above, in the conventional automobile door trim 1, the stopper rib 5 is formed in the waist portion 4, and the rigidity is enhanced by the stopper rib 5, so that the waist portion is improved. From the viewpoint of shock absorption in 4, the cushioning property of the skin material 3 can absorb the impact against a relatively small impact, but when a relatively strong impact such as a side impact is applied, the stopper rib 5 is easily formed. Since it does not deform into a large number, it is not possible to take effective shock absorption measures in the waist part 4, and a large number of expensive shock absorption pads are set, energy absorption means is installed on the door inner panel 6 side, and a significant cost increase. The reality is that they are being forced to.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an automobile door trim which can effectively reduce the impact at the waist portion of the door trim.

[0008]

In order to achieve the above object, the present invention is directed to a single core material molded into a required curved surface shape by injection molding or stamping molding, or a skin material is integrally attached to the surface of the core material. In the vehicle door trim mounted on the interior side of the door inner panel, stopper ribs are formed on the back surface of the waist portion of the core member at appropriate intervals along the longitudinal direction of the vehicle, and the stopper is provided. The rib is provided with a step portion where the load from the door inner panel is concentrated, while a notch is formed in the step portion in the vertical direction. By adjusting the width dimension and the length dimension of the notch, It is characterized in that the buckling load of the stopper rib is controlled.

Further, according to the present invention, a waist garnish made of a resin molding is installed on the back surface of the waist portion of a core material formed into a required curved surface shape, and a skin material is integrally attached to the surface of the core material to form a door. In an automobile door trim mounted on the interior side of an inner panel, stopper ribs are formed on the back surface of the waist garnish at appropriate intervals along the longitudinal direction of the vehicle, and the stopper rib is provided on the door inner panel. The step portion where the load from is concentrated is installed, while a notch is formed in this step portion in the vertical direction, and the buckling load of the stopper rib can be adjusted by adjusting the width and length dimensions of this notch. It is characterized in that it is controlled.

[0010]

[Function] As is apparent from the above construction, the stopper ribs for reinforcing and controlling the position are formed on the back surface of the waist portion of the core material or the back surface of the waist garnish, and the load from the door panel side is concentrated on these stopper ribs. While the step is set up, the step is provided with a notch in the vertical direction, so when a relatively strong impact such as a side impact is applied from the side of the vehicle, the notch serves as the starting point. A crack runs in the vertical direction on the rib, and the stopper rib buckles in the vehicle width direction at the boundary of this crack, and the impact load can be effectively absorbed by this buckling phenomenon.

Further, by adjusting the width dimension or the length dimension of the notch, the load causing the buckling of the stopper rib can be adjusted, so that the strength of the door panel, the rigidity of the door trim, and other shock absorbing means are combined. The buckling load of the stopper rib can be appropriately selected.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a vehicle door trim according to the present invention will be described below in detail with reference to the accompanying drawings.

1 to 4 show a first embodiment of the present invention. FIG. 1 is a perspective view showing a door trim according to the present invention, FIG. 2 is a sectional view of an essential part of the door trim for an automobile, and FIG. FIG. 4 is an explanatory view showing a shock absorbing state in a vehicle door trim, and FIG. 4 is a graph showing a shock absorbing characteristic of the vehicle door trim according to the present invention.

1 and 2, an automobile door trim 10 according to the present invention has a good cushioning property on a surface of a core member 20 made of a resin molded body formed into a required shape by injection molding or stamping molding. It is configured by covering and adhering the skin material 30, and is attached to the indoor side of the door inner panel 40 via a fixing means such as a clip (not shown).

The feature of the present invention is that the door trim 1
The point is to improve the shock absorption performance in the waist region of 0.

That is, on the back surface of the waist portion 21 of the core 20, stopper ribs 50 for reinforcement and position regulation are integrally formed at appropriate intervals along the longitudinal direction of the vehicle. The numeral 50 has a function of strengthening the rigidity of the waist portion 21 and a position regulation function of preventing the waist portion 21 from being fluttered when the door trim 10 is attached to the door inner panel 40.

Further, according to the present invention, the stopper rib 5 is used.
0 is characterized in that, when a side impact such as a side collision is applied to the vehicle, the stress-concentrated stepped portions 51 are set at two places and the notch 52 is formed in the vertical direction in the stepped portion 51. is there.

Therefore, in the case where a relatively large impact is applied from the side such as a side collision, the waist portion 21 of the door trim 10 which is touched by the shoulder or chest of the occupant is exposed from the door inner panel 40 as shown in FIG. The impact load is concentrated on the step portion 51 which is the stress concentration portion of the stopper rib 50, and the notch 52 is formed in this step portion 51. Therefore, the crack 53 is generated in the vertical direction from the notch 52 as a starting point. Then, the stopper rib 50 is buckled and deformed based on the crack 53, and the impact applied to the buckling of the stopper rib 50 can absorb the impact applied to the occupant.

This is apparent from the graph of FIG. 4 showing the correlation between the impact load and the buckling reaction force of the stopper rib 50 with and without the notch 52. As described above, it can be easily understood that the provision of the notch 52 in the step portion 51 as in the present invention is superior in the energy absorption characteristic.

Further, the feature of the present invention is that by varying the width dimension and the length dimension of the notch 52 provided in the step portion 51 of the stopper rib 50, the impact load that causes the buckling phenomenon in the stopper rib 50 can be arbitrarily set. There is a point that can be set.

In other words, the buckling load can be controlled by adjusting the width dimension and the length dimension of the notch 52, and an appropriate buckling load can be taken into consideration in consideration of the strength of the door panel and the rigidity of the door trim 10. Can be set, and in particular, the impact absorption performance at the waist portion 21 of the door trim 10 can be improved.

Next, FIG. 5 shows another embodiment of the present invention. The automobile door trim 60 of this embodiment is obtained by press-forming a sheet material such as a wood fiber board or a composite resin board into a desired curved surface. A core material 70 having a shape is formed, and a waist garnish 80 made of a resin molding is fixed along the back surface of the waist portion 71 of the core material 70. A skin material 90 is integrally formed along the surface of the core material 70. In this vehicle door trim 60, stopper ribs 81 are provided on the waist garnish 80 at appropriate intervals along the longitudinal direction of the vehicle.
The stopper rib 81 is provided with a stepped portion 82 that receives the impact load from the door inner panel 40 in a concentrated manner, while a notch 83 is formed in the stepped portion 82 along the vertical direction, and the width of the notch 83 is formed. As in the first embodiment, the buckling load of the stopper rib 81 can be controlled by adjusting the dimensions and the length.

[0023]

As described above, the vehicle door trim according to the present invention has the following special operational effects.

(1) A stopper rib is provided on the back surface of the waist portion or the waist garnish, and a step portion functioning as a stress concentration portion is provided on the stopper rib, and a notch along the vertical direction is formed in the step portion. When a relatively strong impact is applied from the side such as a side impact, the notch serves as a starting point for cracking, and the buckling deformation of the stopper rib is promoted based on the crack, which causes buckling of the stopper rib. The effect of absorbing the impact is that the impact absorbing function in the waist portion of the door trim can be enhanced.

(2) The buckling load can be controlled by providing a step portion and a notch on the stopper rib provided on the back surface of the waist portion or the waist garnish, and particularly by adjusting the width dimension and the length dimension of the notch. Therefore, in combination with the shock absorbing means such as the strength of the door panel and the rigidity of the door trim, an appropriate shock absorbing function can be exhibited, and there is an effect that a detailed shock absorbing measure can be taken.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a vehicle door trim according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a cross-sectional view showing a shock absorbing state of a vehicle door trim according to the present invention.

FIG. 4 is a graph showing the impact absorption characteristics of a vehicle door trim according to the present invention.

FIG. 5 is a sectional view showing a second embodiment of a vehicle door trim according to the present invention.

FIG. 6 is a cross-sectional view showing a state in which a conventional automobile door trim is attached to a door inner panel.

[Explanation of symbols]

 10 60 Door trim for automobile 20,70 Core material 21 Waist portion 30 Skin material 40 Door inner panel 50 81 Stopper rib 51 82 Step portion 52 83 Notch 80 Waist garnish

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shozo Suzuki 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd.

Claims (2)

[Claims] 1. A door inner, which is formed by injection molding or stamping molding to form a core material (20) alone into a required curved surface shape, or by integrally adhering a skin material (30) to the surface of the core material (20). In an automobile door trim mounted on the interior side of a panel (40), stopper ribs (50) are formed on the back surface of the waist portion (21) of the core material (20) at appropriate intervals along the longitudinal direction of the vehicle. And the stopper rib (50)
The stepped portion (51) on which the load from the door inner panel (40) is concentrated is installed in the stepped portion (5).
A notch (52) is formed in the vertical direction in 1), and by adjusting the width dimension and the length dimension of the notch (52),
A vehicle door trim characterized by controlling a buckling load of a stopper rib (50). 2. A core material (70) formed into a required curved surface shape.
A waist garnish (80) made of a resin molded body is installed on the back surface of the waist portion (71) of the, and a skin material (90) is integrally attached to the surface of the core material (70) to form a door inner panel (40). In the interior door trim for an automobile, stopper ribs (81) are formed on the back surface of the waist garnish (80) at appropriate intervals along the longitudinal direction of the vehicle, and the stopper ribs (81) are also provided. A step portion (82) on which the load from the door inner panel (40) is concentrated is installed in the door, while the step portion (82) is provided.
A notch (83) is formed in the up and down direction, and the buckling load of the stopper rib (81) is controlled by adjusting the width dimension and the length dimension of the notch (83). The car door trim to be.