JPH06278660A - Cabin structure for automobile - Google Patents

Abstract

PURPOSE:To maintain a required surface rigidity and also reduce the weight of a cabin structure of an automobile even if it is formed all out of resin. CONSTITUTION:An inner panel 2 and an outer panel 1 which constitute a cabin structure of automobile are formed out of resin. Also a rib 3 which is extended to the outer panel 1 and connected to the inner surface of the outer panel 1 is formed integrally with the inner panel 2. Then a honeycomb structure is formed with both panels 1 and 2 and the rib 3, and a coated layer 6 is applied on the surface of the inner panel 2 facing toward a cabin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved cabin structure for automobiles.

[0002]

2. Description of the Related Art Conventionally, there has been known an automobile cabin structure of a type in which, for example, a vehicle body having a large internal space is divided into a plurality of easy-to-handle parts and these are integrally assembled by bolts. Kaisho 60-154
959).

In this cabin structure, since the vehicle body is divided into a plurality of parts, each member is transported before assembly, and each divided part can be easily assembled with bolts. Therefore, there is an advantage that it can be easily assembled without special assembly equipment in the assembly process.

[0004]

However, in the above-mentioned conventional cabin structure, the left and right side bodies of the plurality of divided portions are formed of the fiber reinforced plastic material. Moreover, in order to secure the strength and surface rigidity required for the side body, the plastic material must be made relatively thick, and the weight of the side body itself becomes heavy accordingly, and the aim of using the resin body is good. Is not satisfied.

That is, in the above cabin structure, when recycling the car body of an abandoned car, the metal material and the plastic material forming the car body are separately collected,
Recycling suitable for each individual will be achieved, but the sorting work will be complicated and the recycling efficiency will be poor.

[0006] Then, the separated fiber-reinforced plastic material is finely crushed in a recycling factory after being collected. At that time, since the fiber-reinforced material such as the glass fiber mixed is shorter than the initial size, A remolded product of recycled plastic may not have sufficient fiber-reinforced effect. Therefore, in order to obtain a sufficient fiber-reinforced effect in the remolded product, it was necessary to additionally mix a predetermined amount of the fiber-reinforced material in the recovered plastic and remold it.

Further, since the ratio of the vehicle body constituent parts made of fiber reinforced plastic material to the entire cabin is low, there is a problem that the recycling efficiency is low and the cost of recycled products is high.

As described above, in the conventional plasticization of the cabin structure of an automobile, which was started with the aim of reducing the weight and recycling of the vehicle body, the surface rigidity and strength necessary for the vehicle body can be exhibited while utilizing the advantage of being lightweight. It was difficult, and it was not possible to efficiently recycle the collected plastic.

The present invention has been made in view of the above points, and an object of the present invention is to form a whole automobile cabin with a honeycomb structure made of a recyclable plastic material so as to be lightweight and necessary for a vehicle body. It is to enable efficient recycling of vehicle body members while exhibiting rigidity and strength.

[0010]

In order to achieve the above object, the invention of claim 1 is directed to an automobile cabin structure comprising a combination of a resin-molded inner panel and outer panel. In the present invention, the inner panel is integrally formed with a rib protruding toward the outer panel side and joined to the inner surface of the outer panel,
The ribs and both panels have a honeycomb structure, and the surface of the inner panel facing the interior of the vehicle is coated.

According to the second aspect of the invention, at least one of the inner panel and the outer panel constituting the cabin structure of the automobile has a liquid crystal transition temperature higher than the minimum moldable temperature of the matrix resin in the thermoplastic matrix resin. A thermoplastic liquid crystal resin having a high viscosity is used as a reinforcing member and is molded from a molding material.

[0012]

According to the invention of claim 1, the cabin structure of the automobile is formed by combining the outer panel and the inner panel, and the ribs facing the outer side of the inner panel are joined to the inner side surface of the outer panel to form a honeycomb structure. Therefore, the surface rigidity of resin (plastic), which is said to be lower than that of thin metal plates such as steel plates and aluminum plates, is dramatically improved. Therefore, while taking advantage of the characteristics of the resin, which has a small specific gravity and is excellent in terms of moldability and corrosion resistance, the cabin structure exhibits the same performance as a metal plate.

Since both the outer panel and the inner panel are made of resin, it is possible to remove only the cabin structure portion from the abandoned automobile and crush the whole cabin structure portion together without further separation. It can be used as a recycling material.

Furthermore, since the surface of the inner panel that faces the inside of the vehicle is coated, this coating can effectively cover the sink marks and texture deterioration that occur on the vehicle interior surface side due to the formation of the ribs, and as a separate member. No trim material is required and the interior of the cabin can be simplified.

Further, according to the invention of claim 2, since at least one of the panels is formed of a molding material in which a thermoplastic liquid crystal resin is oriented in a fibrous state in a thermoplastic matrix resin, this panel is When recycling, the panel is crushed and then heated above the liquid crystal transition temperature of the liquid crystal resin to obtain a liquid crystal resin composite material in a molten state. By extruding at a temperature of 1, it can be regenerated as a molding material again. By molding this molding material into a predetermined shape at a temperature lower than the liquid crystal transition temperature, molded products such as panels can be repeatedly produced, and the recycling efficiency is very good.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a cabin structure B of an automobile according to an embodiment of the present invention. As shown in FIG. 6, the cabin structure B includes an outer panel 1 as an outer cabin and an inner panel 2 as an inner cabin. It is configured by assembling the floor portion 10 to the combination, and all these members are formed by resin molding.

The cabin structure B shown in FIG.
The side body 7 and the roof 8 of FIG.
As shown in, a honeycomb structure having ribs 3 between the outer panel 1 and the inner panel 2 is formed.
Although the honeycomb structure is not formed in the portion of the front pillar 9 shown in FIG. 4, the honeycomb structure does not interfere with another step.

Specifically, both the side body 7 shown in FIG. 2 and the roof 8 shown in FIG. 3 have a honeycomb structure, and the outer panel 1 located outside the vehicle body and the inner panel located inside the vehicle body. The panels 1 and 2 are made of plastic (preferably reinforced plastic described later). In particular, a plurality of vertical and horizontal ribs 3 are integrally formed on the inner surface of the inner panel 2 that faces the outer panel 1.
And abutting surfaces of the inner peripheral surface of the outer panel 1 and both panels 1, 2.
The ends of the panel are integrally joined with adhesives 4 and 5, whereby the panels 1 and 2 are integrated to form a honeycomb structure.

Further, on the inner surface of the inner panel 2 (the surface opposite to the ribs 3), for example, an interior paint having a trim appearance (for example, a soft paint such as Hi-Shem under the trade name of Ohashi Chemical Industry Co., Ltd.). ) Is coated, and the coating layer 6 can effectively cover the sink marks and the deterioration in texture that occur when the ribs 3 are formed on the inner peripheral surface of the inner panel 2.

Here, the special reinforced plastics constituting the panels 1 and 2 will be described. This is because a thermoplastic liquid crystal resin having a liquid crystal transition temperature higher than the minimum moldable temperature of the matrix resin is reinforced in the thermoplastic matrix resin. For example, as a thermoplastic liquid crystal resin, Vectra A950 (aromatic polyester, liquid crystal transition temperature: about 280 ° C.) manufactured by Polyplastics Co., Ltd. PC / ABS (Techno Ace T105 manufactured by Sumitomo Nogatac Co., Ltd.) is used as the thermoplastic matrix resin, and is exemplified by a liquid crystal resin mixture material produced by mixing both at a predetermined ratio. .

In FIG. 4, 30 is a door and 31 is a front window.

Next, the assembling process of the vehicle adopting the vehicle cabin structure according to the present invention will be described with reference to FIG. 6. First, the outer panel 1 as an outer cabin and the inner panel 2 as an inner cabin.
And the resin are glued in place, and the resin floor part 1
By combining 0, a cabin structure B which is a cabin assembly is obtained. Then, the front unit 11 made of steel is assembled to the front part of the cabin assembly B to form a vehicle body C, the interior and exterior of the vehicle body are painted, and then the vehicle body C is attached to the chassis 12 to form a vehicle D.

On the other hand, FIG. 7 shows a disassembling process which is performed in the reverse order of the above assembling process. First, the chassis 12 is detached from the vehicle D to form a vehicle body C. Then, the steel front unit 11 is removed from the vehicle body C to form a cabin structure B which is a cabin assembly. This cabin structure B is finely crushed by a crusher in a crushing step 13, and then heated and melted to remove a coating film layer in a coating film removing step 14 to be recycled 15 as a recyclable molding material.

Further, FIG. 8 shows a recycling path for regenerating the cabin structure B, which is a cabin assembly obtained by removing the chassis and the front unit from a scrapped vehicle. As shown in the figure, when the cabin structure B, which is a discarded cabin assembly, is collected, it is finely crushed by the crusher 16, and the crushed material 18 is mixed with a new resin raw material 17 as required. Then, melt extrusion is performed by the melt extrusion device 19. At this time, the coating film removing filter 2
At 0 the coating is removed. Then, a sheet-shaped molding material 21 or a strand-shaped molding material 22 is obtained by the melt extrusion device 19. And the sheet-shaped molding material 21
Is preheated by, for example, a preheating device 23, and then press-formed into a predetermined shape by a press-forming device 24 to obtain a constituent member for obtaining a cabin structure B such as an inner panel.

On the other hand, the strand-shaped molding material 22 is
By injecting into a predetermined shape by the injection molding device 21, for example, a constituent member for constructing the cabin structure B such as an outer panel is obtained, and a constituent member of the cabin structure B such as the inner panel and a flow portion (not shown). A cabin structure B is combined.

According to the structure of the above embodiment, the cabin structure of the automobile has the outer panel 1 and the inner panel 2 having the honeycomb structure due to the existence of the ribs 3.
Even if a relatively thin panel material is used, there is an advantage that the surface rigidity and strength can be dramatically improved and the weight can be reduced. Therefore, it is extremely suitable for today's automobile industry in which the fuel economy is improved by reducing the weight of the vehicle body.

As described above, since the cabin structure of the automobile is constructed by combining the inner panel and the outer panel made of resin, the cabin structure can be collectively recycled at the time of recycling without selecting materials in advance.

When the outer panel 1 and the inner panel 2 are molded from a thermoplastic matrix resin containing the above-mentioned thermoplastic liquid crystal resin as a reinforcing member,
When these panels 1 and 2 are crushed at the time of recycling and then heated above the liquid crystal transition temperature of the liquid crystal resin, a liquid crystal resin composite material in a molten state can be obtained. Then, the molten liquid crystal resin composite material is extruded at a temperature not lower than the liquid crystal transition temperature to be repeatedly reused as a molding material again. Therefore, the recycling efficiency is extremely high, which is optimal for resource saving.

[0029]

As described above, according to the first aspect of the invention, the cabin structure of the automobile is composed of the inner panel and the outer panel made of resin, and the ribs provided on both panels and the inner panel side. Since the honeycomb structure is formed by using, the surface rigidity and strength required for the cabin structure of an automobile can be maintained even if the thickness of both panels is relatively thin. And if the cabin structure is all made of resin,
It is possible to use the material for recycling without selecting the material, which has the effect of improving the recycling efficiency. Further, since the weight of the entire cabin structure can be reduced, the weight of the automobile can be reduced and the fuel consumption can be improved. Furthermore, since the sink marks and texture during inner panel molding can be effectively covered by the paint film layer by painting,
Another effect is that the cabin structure can be simplified without the need for another trim material.

Further, according to the second aspect of the invention, since the inner panel and the outer panel are both formed of the composite material in which the liquid crystal resin is mixed in the thermoplastic matrix resin, the panel is crushed during the recycling process. After that, it is melted by heating it above the liquid crystal transition temperature of the liquid crystal resin, and the molding material obtained by extrusion molding this at a temperature above the liquid crystal transition temperature is formed into a predetermined shape at a temperature lower than the liquid crystal transition temperature. By molding, a molded product such as a desired panel can be repeatedly produced. Moreover, in the obtained molded product, the liquid crystal resin retains the dimensions before recycling,
Since it can be recycled without deteriorating the physical properties of the molded product, it has an effect of good recycling efficiency.

[Brief description of drawings]

FIG. 1 is a perspective view of a cabin structure of an automobile according to an embodiment of the present invention.

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

3 is a sectional view taken along line III-III in FIG.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a diagram showing a vehicle assembly process.

FIG. 6 is a diagram showing a vehicle dismantling process.

FIG. 7 is a diagram showing a process of recycling the cabin structure.

[Explanation of symbols]

 B Cabin structure 1 Outer panel 2 Inner panel 3 Rib

Claims (2)

[Claims] 1. A cabin structure of an automobile comprising a combination of a resin-molded inner panel and outer panel, wherein the inner panel is integrally formed with a rib protruding toward the outer panel and joined to an inner surface of the outer panel. A cabin structure for an automobile, characterized in that it is formed of a honeycomb structure by the both panels and ribs, and that the surface of the inner panel facing the interior of the vehicle is coated. 2. In at least one of the inner panel and the outer panel, a thermoplastic liquid crystal resin having a liquid crystal transition temperature higher than the minimum moldable temperature of the matrix resin is blended in a thermoplastic matrix resin as a reinforcing member. The cabin structure for an automobile according to claim 1, wherein the cabin structure is formed of a molding material.