JPH0664559A - Dash panel for automobile - Google Patents

Abstract

PURPOSE:To provide an automobile dash panel suppressing weight increase and preventing the generation of rust to a cowl top. CONSTITUTION:A dash panel 10 is fitted to the opening of an automobile of such structure that a partition part between the vehicle interior 12 and an engine room 14 is provided with a cowl top 18 above and a floor panel 20 below with the intermediate opening 16 placed in between. This dash panel 10 is provided with a wall part 24 of hollow structure and a gutter part 28 formed integrally of synthetic resin. The wall part 24 is provided with a joint part 22 to be jointed to the floor panel 20, and extended upward from this joint part 22. The gutter part 28 is extended backward from the intermediate part of the wall part 24, and the free end part is made into a joint part 26 to the cowl top 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dash panel of an automobile, and more particularly, a cowl top is provided in the upper part and a floor panel is provided in the lower part in front of a partition part between a vehicle compartment and an engine compartment. The invention relates to the dash panel of a motor vehicle, which has been arranged and which has a modular dash panel attached to the opening in the assembly line.

[0002]

2. Description of the Related Art A cowl top is arranged in advance above a partition between a vehicle compartment and an engine compartment of an automobile body, and a floor panel is arranged below the compartment, while an opening is provided between the cowl top and the necessary equipment and instruments. A front structure of a vehicle body has been proposed in which a modular dash panel is attached to the opening in an assembly line by mounting the above components (Japanese Patent Laid-Open No. 2-3039).
No. 78).

[0003]

Since the modularized dash panel is assembled to the vehicle body in the final step of the assembly line, it cannot be attached by spot welding. Therefore, adhesive joining or tightening joining with bolts and nuts is performed, which causes an increase in weight.

Further, there is another problem that is not directly related to the weight increase. That is, the cowl top of the vehicle body also functions as a gutter for rainwater, but since the cowl top is conventionally made of steel, rust may occur.

An object of the present invention is to provide an automobile dash panel which can suppress the increase in weight and prevent the cowl top from rusting.

[0006]

According to the present invention, a cowl top is attached to an upper part of a partition between a vehicle compartment and an engine compartment with an intermediate opening interposed therebetween, and the cowl top is attached to the opening of a vehicle having a floor panel below. A dash panel, which has a joining portion joined to the floor panel, extends upward from the joining portion, and extends rearward from an intermediate portion of the wall portion, and has a free end portion of the cowl top. It is provided with a gutter part as a joint part and is integrally molded with synthetic resin.

It is preferable that at least a portion of the wall portion below the gutter portion is hollow.

[0008]

[Operation and effect] The dash panel is brought to the opening of the partition in the assembly line and joined to the floor panel and the cowl top. Attach necessary equipment and instruments to the dash panel prior to assembly.

Since the dash panel is made of synthetic resin,
Since the weight can be reduced as compared with the conventional steel product, the weight increase can be suppressed as a whole even when the modularized dash panel is attached by adhesive joining or bolt and nut tightening joining.

A gutter part extending rearward from an intermediate part of the wall part and a part of the wall part located above the gutter part are combined to form a gutter. Since the gutter is made of synthetic resin, it is rusted. Will never occur.

According to a preferred embodiment, at least a portion of the wall portion below the trough portion is hollow, so that the rigidity can be increased and the sound insulation effect can be enhanced.

[0012]

EXAMPLE A dash panel 10 is shown in FIG.
A cowl top 18 is attached to an upper portion of a partition between the vehicle compartment 12 and the engine compartment 14 with an intermediate opening 16 interposed therebetween, and the floor panel 20 is attached to the lower opening 16 of the vehicle. In other words, the cowl top 18 and the floor panel 20 are arranged in advance on the body of the automobile, and the opening 16 having a predetermined size is provided between them. This is brought to an assembly line and the dash panel 10 is attached to the opening 16 to form a partition between the vehicle compartment 12 and the engine compartment 14.
With this configuration, the dash panel 10 can be attached in the final step of assembling the partition section, so that the dash panel 10 can be equipped with necessary devices and instruments to be modularized.

The dash panel 10 is a floor panel 20.
A trough portion having a joint portion 22 joined to the above, a wall portion 24 extending upward from the joint portion 22, and a rear end extending from an intermediate portion of the wall portion 24, and a free end portion thereof being a joint portion 26 with the cowl top 18. 28 and are integrally formed of synthetic resin. For the material of the dash panel 10, for example,
Thermoplastic polypropylene or nylon can be used.

In the illustrated embodiment, the wall portion 24 of the dash panel 10 has a hollow portion 25 and has a hollow cross-section structure. At the lower end of the wall portion 24, a downward groove 23 extending in the lateral direction of the vehicle body is provided to form a joint portion 22. on the other hand,
The floor panel 20 includes a floor inner 30 and a floor outer 32 welded to the floor inner 30. An adhesive is injected into the groove 23 of the joint portion 22 of the dash panel, the floor panel 20 is inserted into the groove 23, and the dash panel 10 and the floor panel 20 are joined.

The hollow sectional structure of the wall portion 24 of the dash panel needs to be provided at least in the portion of the wall portion 24 below the trough portion 28. Wall 24 below the trough 28
Receives a load from a brake pedal (not shown) attached thereto. In order to receive this load and suppress the deformation of the wall portion 24, the portion of the wall portion 24 below the gutter portion 28 has a hollow cross-section structure to have great rigidity. When the wall portion 24 has a hollow cross-section structure, it is preferable to seal the hollow portion 25, which can enhance the sound insulation effect.

To provide a hollow portion in the wall portion 24 of the dash panel 10, gas injection of the core back method can be used. That is, as shown in FIG.
The resin 104 is injected into the mold 100 in which 2 is movably arranged (a in the figure), and gas is injected into the resin 104 through the gas injection port 106 to expand the resin 104 and the core back 1
02 is moved (b in the figure) to form a product 110 having a hollow portion 108 (c in the figure). Product 11 has holes 11
Since there is 2, the hole 112 is closed thereafter.

In the illustrated embodiment, the joint portion 26 is formed by providing an upward groove 27 extending in the lateral direction of the vehicle body at the free end of the trough portion 28 of the dash panel 10. on the other hand,
The cowl top 18 includes a cowl panel 34 and a cowl reinforcement 3 welded to the cowl panel 34.
6 and 6. Groove 27 of joint part 26 of dash panel
An adhesive is injected in advance, the cowl top 18 is inserted into the groove 27, and the dash panel 10 and the cowl top 18 are joined.

As shown in FIG. 3, the lateral side portions of the wall portion 24 of the dash panel 10 have a flat portion 38 having no hollow portion.
And the flat portion 38 is adhesively bonded or clamped to the peripheral edge of the opening. Cowl panel 34 of the cowl top 18
The cowl reinforcements 36 are welded to the left and right front pillars 40, and bear the load in the left-right direction acting on the vehicle body. Therefore, it is not necessary to give the gutter part 28 a large rigidity, and the thickness thereof is smaller than the total thickness of the wall part 24.

The gutter portion 28 of the dash panel 10 and the wall portion 2
The part 42 extending upward from the gutter part 28 of 4 together forms a gutter 44. Since this gutter 44 is made of synthetic resin, the problem of rust does not occur.

The dash panel 50 shown in FIG. 2 also has an intermediate opening 1 at the partition between the vehicle compartment 12 and the engine compartment 14.
The cowl top 18 is attached to the upper side of the vehicle 6 and the floor panel 20 is attached to the lower side of the cowl top 18.

The dash panel 50 is the floor panel 20.
A wall portion 54 that extends upward from the joint portion 52, and a rear end extending from an intermediate portion of the wall portion 54 and a free end portion that joins the cowl top 18
6 and a gutter portion 58, which are integrally formed of synthetic resin. However, in the dash panel 50, the wall portion 54 does not have a hollow portion, and in order to enhance rigidity, the thickness of the portion of the wall portion 54 below the trough portion 58 is large.

A downward groove 53 extending in the lateral direction of the vehicle body is provided at the lower end of the wall portion 54 of the dash panel 50 so that the joint portion 52 is further provided at the free end portion of the trough portion 58 in the lateral direction of the vehicle body. A joint portion 56 is formed by providing an upwardly extending groove 57. And the gutter 58 of the dash panel 50
And a portion 60 of the wall portion 54 extending above the gutter portion 58 form a gutter 62 of synthetic resin.

The transmission loss of a synthetic resin plate having a hollow thickness of 4 mm and having a thickness of 4 mm is calculated according to the frequency.
Is. On the other hand, the thickness d is 2 mm and the space D between the hollow portions is
The result of measuring the transmission loss of the molded product having a size of 34 mm and the ribs 21 provided between the hollow portions as shown in FIG. 1 is black circle B and white circle C in FIG. Here, a black circle B is a case where the hole 112 of FIG. 4 is closed, and a white circle C is a case where the hole is not closed.

From FIG. 5, it can be considered that the sound insulation effect of the product having the hollow portion is higher than that of the plate having no hollow portion, particularly in the range of engine noise. It is also effective to close the hole.

If a groove is provided in the joint portion as in the above-mentioned embodiment, this groove can be used as an adhesive reservoir and also serves as a guide when the adhesive is applied. It will be easy. In this case, an adhesive having a high viscosity such as urethane or epoxy is used.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an embodiment of an automobile dash panel according to the present invention taken along a vertical plane including a central axis extending in a front-rear direction of a vehicle body.

FIG. 2 is a cross-sectional view of another embodiment of the vehicle dash panel according to the present invention, taken along a vertical plane including a central axis extending in the front-rear direction of the vehicle body.

3 is a perspective view showing a lateral side portion of the vehicle body of the dash panel shown in FIG. 1 and a vehicle body.

FIG. 4 is a schematic diagram showing a method for obtaining a molded product having a hollow portion.

FIG. 5 is a diagram showing characteristics of transmission loss and frequency.

[Explanation of symbols]

 10, 50 Dash panel 12 Car room 14 Engine room 16 Opening 18 Cowl top 20 Floor panel 22, 26, 52, 56 Joint part 24, 54 Wall part 25 Hollow part 28, 58 Gutter part 44, 62 Gutter

Claims (2)

[Claims] 1. A dash panel that is attached to the opening of a vehicle having a cowl top on the upper side and a floor panel on the lower side of a partition between a vehicle compartment and an engine compartment, the cowl top being mounted on the floor. A wall portion having a joint portion joined to the panel, extending upward from the joint portion, and a trough portion extending rearward from an intermediate portion of the wall portion and having a free end portion as a joint portion with the cowl top. An automobile dash panel that is equipped with and integrally molded with synthetic resin. 2. The dash panel for an automobile according to claim 1, wherein at least a portion of the wall portion below the gutter portion is hollow.