JPH08164810A - Interior member for vehicle and fitting structure thereof - Google Patents

Abstract

PURPOSE: To provide an interior member for a vehicle and fitting structure thereof eliminating the fear of bosses in the interior member protruding from the surface at the time of a side collision accident so as to protect an occupant's body further positively and to aim at safety at the time of the accident. CONSTITUTION: A hollow shell-like body 2 with the fitting face 3 side opened, and a cushioning grated rib 5 disposed inside the hollow shell-like body 2 are integrally formed of synthetic resin. Short-sized boss 6 with the tips not reaching the fitting face 3 are integrally protruded from the inner surface of the hollow shell-like body 2, and the tip parts of fitting screws 12 inserted through a fitted part 10 are screwed into the bosses 6. The tip faces of the bosses 6 are thereby fitted in the spaced state from the fitted part 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle interior member such as an armrest and its mounting structure.

[0002]

2. Description of the Related Art In recent years, high safety has come to be required not only for frontal collisions but also for side collisions (hereinafter referred to as "side collisions"). For these reasons, measures have been taken to enhance the safety of the occupant when the occupant makes a secondary collision with an interior member such as an armrest in the event of a side collision of an automobile. Specifically, a cushioning material such as urethane foam or foam beads has been provided inside an interior member such as an armrest (Japanese Patent Laid-Open No. 4-2936).
40, Japanese Patent Laid-Open No. 5-514, etc.). However,
Since this type of cushioning material is formed as a separate member from the main body of the interior member, it is inferior in productivity due to the cost of manufacturing and assembling. Therefore, the present inventors have already proposed an interior member integrally formed with a cushioning material, as shown in FIG. 6 as an example of an armrest. This is one in which a lattice-shaped rib b that can be destroyed by a shock at the time of a side impact is integrally formed inside a hollow shell-shaped body a formed of a thermoplastic resin such as polypropylene. According to this structure, it is not necessary to mold the two members, and the number of assembling steps is not required, which has an advantage of cost reduction. In the figure, reference numeral c indicates a hollow shell for screwing a mounting screw e inserted into a required mounting portion of a door inner panel, which is a mounted portion d, as shown in FIG. 7 in which the armrest is mounted. A mounting boss integrally provided on the inner surface of the body a, and a symbol f is a cross-shaped reinforcing rib formed on the outer peripheral surface of the boss c.

[0003]

However, in the case of the armrest, as shown in FIG. 8, even if the hollow shell a, the rib b, etc. buckle or deform with respect to the side collision, the boss c has a mounting screw. Since it is formed so as to have a mechanical strength and rigidity capable of screwing in e, buckling and deformation are hardly caused even by a strong external force applied at the time of a side collision. Therefore, when a side impact load is applied, the amount of buckling deformation differs from that of the other cushioning portions, and as a result, the root portion v of the boss c may project from the armrest design surface, and safety for the occupant is maintained. It wasn't the situation.

The present invention solves the above problems and eliminates the risk of the boss in the interior member projecting to the surface in the event of a side collision, ensuring more reliable protection of the occupant's body and ensuring safety in the event of an accident. It is an object of the present invention to provide a vehicle interior member and a mounting structure for the same as illustrated.

[0005]

SUMMARY OF THE INVENTION The gist of the first aspect of the present invention is to mold a hollow shell-like body having an opening on the mounting surface side with a synthetic resin and to screw the tip of a mounting screw penetrating a mounting portion. The interior member for a vehicle is characterized in that the boss is integrally raised from the inner surface of the hollow shell with a short dimension such that the tip surface does not reach the mounting surface. According to a second aspect of the present invention, in addition to the structure of the first aspect of the present invention, there is provided an interior member for a vehicle in which a cushioning grid rib is disposed inside the hollow shell-shaped body by integrally molding the hollow shell-shaped body. The third aspect of the present invention is to form a hollow shell-shaped body having an opening on the mounting surface side with a synthetic resin, and to integrally bulge a short boss whose tip does not reach the mounting surface from the inner surface of the hollow shell-shaped body. An interior member for a vehicle, characterized in that the tip end portion of a mounting screw penetrating the attachment portion is screwed into the boss so that the tip end surface of the boss can be attached in a state of being separated from the attachment portion. In the mounting structure, in the fourth invention,
In addition to the structure of the third invention, a cushioning grid rib disposed inside the hollow shell is integrally formed with the hollow shell.

[0006]

With the short boss shape in which the boss tip surface does not reach the mounting surface of the mounted portion as in the present invention, the boss tip surface and the mounted portion are separated from each other even if a strong external force acts in the event of a side collision. So, first, the interior materials around the boss are crushed,
Large load is not transmitted to passengers. Further, unlike the conventional product, stress is not concentrated on the boss base. That is,
The mounting screw moves along with the side collision so as to be pushed out of the attached portion.Therefore, the boss may project from the hollow shell to the design surface until the tip surface of the boss hits the attached portion. Absent. As in the second and fourth inventions, when the lattice ribs for cushioning are integrally formed in the hollow shell, the manufacturing is easy, and the lattice ribs function as an absorber that absorbs impact,
It will be more useful in protecting passengers and increasing safety.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The vehicle interior member and its mounting structure according to the present invention will be described in detail below with reference to embodiments. 1 to 3 show an embodiment of a vehicle interior member and its mounting structure. As an interior member for a vehicle, the present invention is applied to an armrest attached to the interior side of a vehicle door inner panel (attached portion). 1 is a perspective view showing the interior member alone from the mounting surface side, FIG. 2 is a vertical cross-sectional view of the interior member attached to a mounting portion, and FIG. 3 is a deformed state of the interior member of FIG. 2 during a side collision. 4 is a vertical cross-sectional view showing the above, and FIG. 4 is an explanatory cross-sectional view showing the time-dependent change of impact deformation at the time of a side collision of the interior member.

The interior member 1 is made of a crystalline thermoplastic resin (PP) containing polypropylene as a main component, an amorphous thermoplastic resin (ABS resin) containing three components of acrylonitrile, butadiene, and styrene. It is integrally molded by injection molding. In the figure, reference numeral 2 is a semi-circular dome-shaped hollow shell-shaped body having an opening on the mounting surface 3 side, and reference numeral 4 is an elbow pad portion integrally formed on one side of the hollow shell-shaped body 2. Then, the lattice-shaped ribs 5 for cushioning are integrally formed inside the hollow shell-shaped body 2. The grid-like ribs 5 are formed so that the ribs are thinner than the hollow shell-shaped body 2 so as to form a vertical and horizontal grid-like shape from the inner surface of the hollow shell-shaped body 2 toward the mounting surface 3 (FIG. 1). Such a grid-like rib 5 is easily buckled and deformed by a strong external force applied at the time of a side collision, and exhibits a cushioning function capable of absorbing the impact. In this embodiment, the grid-shaped rib 5 is integrally molded with the hollow shell-shaped body 2, but a separately molded body may be incorporated later.

Then, four cylindrical bosses 6 having sufficient mechanical strength and rigidity are integrally raised from the inner surface of the hollow shell-like body 2 at appropriate intervals (FIG. 2). here,
The length L of each boss 6 is short so that its tip 7 does not reach the mounting surface 3. A stop hole 8 is formed concentrically on the surface of the tip 7 of each boss 6.

On the other hand, a through hole 11 is formed in the attached portion 10 (inner panel) corresponding to the position of the boss 6. Then, as shown in FIG. 2, the mounting screw 12 is penetrated through the through hole 11, and the tip end portion of the mounting screw 12 is screwed into the stop hole 8 of each boss 6 and tightened.
The surface is firmly attached in a state of being separated from the attached portion 10 with a gap G. The gap G is appropriately set in consideration of the degree of buckling and deformation of the lattice rib 5 at the time of side collision.

When the armrest, which is the interior member 1 configured as described above, is attached to the attached portion 10, the safety of the occupant is ensured even in the event of a side collision or the like. The action and effect of the side collision accident will be described with reference to FIGS. 4 and 5. FIG. 4 is a transverse cross-sectional view of the vehicle interior member 1 according to the present embodiment mounted on the mounted portion 10, and FIG. 5 corresponds to FIG. 4, and a conventional boss in which the boss tip surface i abuts on the mounted portion 10. Figure 4 shows a cross-sectional view using c. 4 and 5, the upper side is inside the vehicle compartment R,
The symbol W represents the waist of the occupant. First, according to the conventional product, when an external force (arrow pointing upward from the lower side of FIG. 5B) which is a side impact load is applied from the stationary state of FIG. 5 (FIG. 5A),
The waist W of the occupant collides with the armrest (secondary impact force) due to the reaction, and the rib b deforms and contracts in response to the secondary impact force.
Since the boss c has high rigidity, stress concentrates on its root portion g (FIG. 5B). Then, the material of the root portion g may be destroyed, and the mounting boss c may project toward the waist W (FIG. 5C).

On the other hand, in the interior member 1 of this embodiment, when an external force, which is a side impact load, is applied from the stationary state (FIG. 4 (a)), the waist of the occupant collides with the armrest by a reaction. At this time, the inner panel 10 and the boss 6 are in a separated state, and the lattice-shaped rib 5 in the gap G portion undergoes buckling deformation to absorb an external force (FIG. 4B). Even if a larger external force is applied, since the boss tip 7 is not in contact with the mounted portion 10, the lattice ribs 5 around the boss 6 are only buckled and deformed accordingly, and occupant safety can be improved ( FIG. 4 (c)). Then, along with the deformation of the lattice rib 5,
The mounting screw 12 relatively moves so as to be pushed out from the mounted portion 10 toward the door outer panel side (FIG. 3). Thus, the safety of passengers is guaranteed.

The present invention is not limited to those shown in the above embodiment, but can be variously modified within the scope of the present invention depending on the purpose and application. In the embodiment, the case where four bosses 6 are formed has been described, but the number of bosses 6 is appropriately set in consideration of the required mounting strength and the like. Ribs may be radially formed on the outer peripheral surface of the boss 6 for reinforcement. Further, the description has been given of the case where the lattice-shaped ribs 5 are integrally formed in the hollow shell-shaped body 2, but the lattice-shaped ribs 5 are formed in the hollow shell-shaped body 2.
Instead of this, other forms of cushioning ribs, cushioning foam, or the like may be integrally formed, or a cushioning material formed in a lattice shape or a porous shape may be incorporated as a separate member.
Further, it is applicable not only to armrests but also to mounting dashboards, console boxes, glove boxes, and other vehicle interior members. In such a case, the shape and shape of each part can be changed according to the function, application, required strength, etc. of the interior members. The constituent material and the like can be appropriately selected.

[0014]

As described above, in the vehicle interior member and its mounting structure according to the present invention, even when the interior member is deformed due to a strong external force in the event of a side collision, the boss changes from the hollow shell to the design surface. Since there is no fear of the occupant protruding, there is a beneficial effect in improving the safety of the occupant.

[Brief description of drawings]

FIG. 1 is a perspective view of an interior member for a vehicle showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a mounted state of the vehicle interior member of FIG.

3 is a vertical cross-sectional view showing a deformed state of the vehicle interior member of FIG. 2 during a side collision.

FIG. 4 is an explanatory cross-sectional view showing a change over time in impact deformation during a side collision of a vehicle interior member according to an embodiment.

FIG. 5 is an explanatory cross-sectional view showing changes over time in impact deformation of a conventional vehicle interior member during a side impact.

FIG. 6 is a perspective view showing an example of a conventional vehicle interior member.

FIG. 7 is a vertical cross-sectional view showing a mounted state of the conventional vehicle interior member of FIG.

8 is a vertical cross-sectional view showing a deformed state of the conventional vehicle interior member of FIG. 7 during a side collision.

[Explanation of symbols]

 1 Interior Member 2 Hollow Shell 3 Mounting Surface 5 Lattice Rib 6 Boss 7 Tip 8 Stop Hole 10 Attached Part 11 Through Hole 12 Mounting Screw G Gap

Claims (4)

[Claims] 1. A synthetic resin is used to form a hollow shell-shaped body having an opening on the mounting surface side, and a boss for screwing a tip end portion of a mounting screw penetrating a mounting portion is provided. An interior member for a vehicle, characterized in that the surface is raised integrally with the inner surface of the hollow shell with a short dimension such that the surface does not reach the mounting surface. 2. A hollow shell-shaped body having an opening on the mounting surface side made of a synthetic resin, and a cushioning grid rib disposed inside the hollow shell-shaped body are integrally molded, and the mounted portion is penetrated. A boss is provided for screwing the tip end of the mounting screw, and the boss is integrally raised from the inner surface of the hollow shell with a short dimension such that the tip surface does not reach the mounting surface. Characteristic vehicle interior member. 3. A hollow shell-shaped body having an opening on the mounting surface side is molded from a synthetic resin, and a short boss whose tip does not reach the mounting surface is integrally raised from the inner surface of the hollow shell-shaped body. Mounting of an interior member for a vehicle, characterized in that the tip end portion of a mounting screw inserted into the mounting portion is screwed into the boss so that the tip surface of the boss can be mounted in a state of being separated from the mounted portion. Construction. 4. A hollow shell-shaped body having a mounting surface opened by a synthetic resin, and a cushioning grid rib disposed inside the hollow shell-shaped body are integrally molded, and further, the tip end is the mounting portion. A short boss that does not reach the surface is integrally raised from the inner surface of the hollow shell-like body, and the tip end of the mounting screw that is inserted into the mounted portion is screwed into the boss The mounting structure for the vehicle interior member is characterized in that the mounting part is mounted in a state of being separated from the mounted part.