JPS6411490B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an instrument panel mounting structure.

<Prior Art> Examples of conventional instrument panel mounting structures include those shown in FIGS. 1 to 4 (see Japanese Utility Model Publication No. 48-39303). That is, the entire instrument panel 1 is integrally molded from a synthetic resin material, and as shown in FIG.
is attached to the vehicle body by being bolted to the air conditioning unit 3 and reinforcement 4. The front side 3a of the air conditioning unit 3 is fixed to the dart lower panel 5, and the lower side 3b is fixed to the floor 6, and the rain force 4 is fixed to both sides 4a,
4b are each fixed to the vehicle body, that is, the side panel 7. On the other hand, the upper part 8 of the instrument panel 1 is attached to the vehicle body at multiple locations in the vehicle width direction. In the illustrated example, a mounting seat 11 is provided via a cylindrical part 15 recessed across a flat part 9 of the upper part 8 and a vertical part 10 continuous thereto. A bracket 13 corresponding to the mounting seat 11 is fixed to the panel 12, and by tightening the mounting seat 11 and the bracket 13 together with bolts 14, the upper part 8 of the instrument panel 1 is mounted on the vehicle body side. There is. Therefore, as shown in FIG. 4, the tip 9a of the flat portion 9 is cantilevered by the bracket 13 via the cylindrical portion 15 and the mounting seat 11 with a span 1 extending to the cylindrical portion 15. 16 is a shelf part of the instrument panel 1, 17 is a central part of the instrument panel 1, 18 is a radio and instruments installed in this central part 17, 19 is a front windshield panel, 20 is a weather strip, 21 indicate airboxes.

<Problems to be Solved by the Invention> However, in such a conventional instrument panel mounting structure, the entire instrument panel 1 is formed of a synthetic resin material, and the upper part 8 is made of a synthetic resin material. It was attached to the vehicle body at multiple locations, and the attachment was performed by fixing the mounting seat 11 of the cylindrical portion 15, which was previously formed integrally with the upper portion 8, to the vehicle body with bolts 14.
Even if the upper part 8 of the instrument panel 1, specifically the flat part 9, rapidly increases in temperature due to direct sunlight and tries to expand and expand in the vehicle width direction, the mounting seats 11 at multiple locations remain as "fixing points". As shown in Figure 1, these mounting seats 11
between points A, B, and C where the tip 9 is provided.
Shape 9'a where a is uneven up and down, ie "wavy phenomenon"
Even when the sun sets at night and the temperature outside the vehicle drops, the uneven deformation tends to remain as it is and become permanent deformation (see the imagination in Figures 1 and 3). Since the part where this occurs is a part that is easily visible in front of the driver, it looks bad not only from the inside of the vehicle, but also from the outside of the vehicle, and there is a problem that the quality and commercial value that are originally required for the instrument panel 1 cannot be guaranteed. be. The above-mentioned problems become more noticeable in the summer or in places where the climate is such that the days are high and the nights are low (for example, the Middle East).

<Means for Solving the Problems> In order to solve these conventional problems, the instrument panel mounting structure according to the present invention provides a heat deformable mounting structure that is located near the front windshield panel in the upper part of the instrument panel. A cylindrical portion is provided at a position where the barrel tip remains, and a cutout is formed on the surface of the cylindrical portion on the tip side.

<Example> The present invention will be explained below based on the drawings.

In the following, parts that are the same as or similar to those in the prior art will be indicated by the same reference numerals and repeated explanation will be omitted.

FIG. 5 to FIG. 7 are diagrams showing one embodiment of the present invention. The cylindrical portion 31 is located at a distal end portion Z of the upper portion 8 of the instrument panel 1 that is close to the front windshield panel 19 and is thermally deformable.
This cylindrical portion 31
A cutout 30 is formed on the surface of the tip Z side. This thermally deformable tip portion Z approximately corresponds to the flat portion 9 of the instrument panel 1,
This is a part of the instrument panel 1 that is particularly susceptible to thermal deformation.

Therefore, as shown in FIG. 6, the distal end Z is separated from the mounting seat 11 due to the existence of the cutout 30, and the mounting seat 11 is connected to the connecting wall portion remaining between the vertical surface portion 10. It is integrally formed with the instrument panel 1 only via the cylindrical portion 31 in the state. Therefore, so to speak, the tip 9a of the tip Z is cantilever-supported by the bracket 13 fixed to the vehicle body side via the cylindrical portion 31 and the mounting seat 11 remaining in the span L reaching the cylindrical portion 31.

The size of the cutout part 30, in other words, the size of the remaining cylindrical part 31 or the size of the span L, depends on the type of resin material of the instrument panel 1, the thickness of the panel, the presence or absence of ribs or other reinforcement, etc. Although it depends on the conditions, at least the amount of thermal deformation of the tip Z and its tip 9a can be absorbed and the mounting seat 11
The design shall be such that it does not affect the mounting rigidity or vibration resistance through. Although not shown, a lid body is appropriately attached to the recessed portion of the mounting seat 11 of the instrument panel 1 in order to hide the cutout portion 30.

Next, the effect will be explained.

In the instrument panel mounting structure according to the present invention, the upper part 8 of the instrument panel 1 is mounted to the vehicle body at multiple locations as in the conventional case, but the cylindrical portion 31 at each mounting location A, B, and C has a cutout. 30 is formed, each attachment point A,
The tips Z at B and C are separated from the mounting seat 11. And this mounting seat 11
Since it is only integrated with the vertical surface part 10 via the remaining cylindrical part 31, the span L from the tip 9a of the tip part Z to the cylindrical part 31 is longer than the conventional span l.

For this reason, when the tip Z thermally deforms due to the influence of direct sunlight and expands in the vehicle width direction, it extends without being restrained by the mounting points A, B, and C.
The tip 9a also does not cause much undulation. Also, when the temperature outside the vehicle decreases and the synthetic resin material attempts to shrink due to its reversibility to heat, each mounting point A,
Since it is not restrained by B and C, the tip Z is restored to its original state without any residual deformation during expansion, and no uneven shape remains between the attachment points A, B, and C.

- Test example - As shown in Figure 7, A, B,
Provide attachment points at C3 locations and attach the upper part 8 of the instrument panel 1 to the vehicle body side. Then, the size of the tip Z, which is heat deformable, is 90 m/m,
The span L was 120m/m. Therefore, the missing part 3
As for the size of 0, the difference is 30m/m. Next, each mounting point A, B, C is installed using the conventional method [Fig.
A heat cycle test was conducted using two types of mounting structures: one shown in FIG. In the case of the conventional structure, when expanding, the line X of the tip 9a between the mounting points A and B and between the same B and C has a convex shape of about 30 m/m, and permanent deformation remains even after returning to room temperature. The surface had an uneven shape of about 4 to 5 m/m. However, in the case of the structure of this invention, the line Y of the tip 9a during expansion is about 30 m/
Although the shape is convex due to thermal deformation by about m, the tip Z near the attachment point B has a line Y because the span L is not constrained.
As shown in the figure, the entire surface became gentle, and when the temperature was returned to room temperature, the line Y only exhibited a convex shape of about 1.0 to 1.5 m/m.

<Effects of the Invention> Since the instrument panel mounting structure according to the present invention has the content as described above, it can absorb thermal deformation due to the influence of direct sunlight, and can prevent undulations and uneven shapes from remaining on the upper part of the instrument panel. This greatly reduces the number of things that need to be done, and the quality of the appearance of the instrument panel can be improved accordingly. Moreover, there is no need to reduce the number of attachment points on the upper part of the instrument panel, and the lower part of the instrument panel is fixed to the vehicle body as before, so there is no negative impact on mounting rigidity, vibration resistance, etc., and there is no chatter. It is also possible to suppress the generation of sound.

[Brief explanation of drawings]

Figure 1 is a front view of the instrument panel showing the conventional instrument panel mounting structure;
The figure is a sectional view taken along the - line in Figure 1, Figure 3 is an enlarged sectional view of the main part, Figure 4 is a perspective view of the main part seen from the direction of the arrow in Figure 3, and Figure 5 is A sectional view corresponding to FIG. 3 showing an embodiment of the present invention, and FIG.
FIG. 7 is a perspective view of the main parts seen from the direction of the arrow in the figure, and FIG. 7 is a front explanatory view of the upper part of the instrument panel showing a test example. 1...Instrument panel, 2...Lower part,
3...Air conditioning unit, 4...Rainforce,
5, 6, 7, 12...Vehicle body, 8...Top, 9...
Flat part, 11...Mounting seat, 14...Bolt, 1
5, 31...Cylindrical part, 30...Cut out part, Z...Tip part which is thermally deformable.

Claims (1)

[Claims] 1. The lower part 2 of the instrument panel 1 is attached to the vehicle body via the air conditioning unit 3 or the reinforcement 4, and the upper part 8 is a cylindrical part 31 recessed in the upper part.
By fixing the mounting seat 11, which corresponds to the bottom of the cylindrical part integrally formed with the vehicle body, with the bolt 14,
In the instrument panel mounting structure in which the instrument panel is mounted at multiple locations in the vehicle width direction, the cylindrical portion is attached to the front windshield panel 1 of the upper part of the instrument panel.
The instrument panel mounting structure is provided at a position that leaves a thermally deformable tip Z close to the cylindrical portion 9, and a cutout 30 is formed on the surface of the cylindrical portion on the tip side.