JPH0353130B2 - - Google Patents

Description

[Detailed Description of the Invention] <Field of the Invention> The present invention relates to a reinforcing structure for a rear parcel for an automobile, and in particular for preventing deformation and protrusion of the ends of the reinforcement due to resin shrinkage after press molding of the rear parcel for an automobile. related to things.

<Prior art and its problems> An automobile rear parcel is a member installed in the rear luggage compartment of a hatchback-type passenger car to partition the luggage compartment into an upper and lower compartment, and is designed to provide sufficient resistance in the direction of the load. It is necessary. Therefore,
The rear parcel is integrally press-molded with one or more reinforcements interposed between the resin sheets, so that the reinforcing core material is embedded between the resin sheets.

According to the above method, since the rainforth is completely covered with resin, it is possible to eliminate the deterioration in appearance caused by the rainfuse being exposed on the back surface when the rear parcel is opened.

However, in such a structure, the resin shrinkage after the press molding causes the rear parcel main body portion to be distorted or both ends of the reinforcement to break through the resin material, causing a decrease in yield.

As a means to solve the above problems, the third
As shown in FIG. It has been done to

However, even with this method, the end cap 2 cannot slide sufficiently because the resin enters the fitting margin 3 between the reinforcement 1 and the end cap 2 during press molding and then hardens.

For this reason, the rear parcel body part may be distorted,
As shown in FIG. 3B, the end 2a of the end cap 2 may break through the resin.

Furthermore, it has been pointed out that the resin 5 has drawbacks such as poor appearance due to the formation of a recess 4 near the fitting margin 3.

<Objective of the Invention> The object of the present invention is to prevent the above-mentioned distortion of an automobile rear parcel after press molding or the protrusion of the reinforcement, and to improve the yield.

<Configuration and Effects of the Invention> In order to achieve the above object, the present invention embeds a rain force between resin sheets, and
A rear parcel for an automobile in which small-diameter fitting allowances provided on the end cap are fitted to both ends of the rain force so that the end cap slides into the rain force as the resin sheet contracts. A buffer member is provided around the outer periphery of the mating space, and by bringing the end of the reinforcement into contact with the buffer member, the end cap slides into the reinforcement while compressing and deforming the buffer member as the resin sheet contracts. It is characterized by

According to the above configuration, it is possible to prevent the resin from entering the fitting margin.

Furthermore, since the buffer member easily contracts, the end cap can slide smoothly.

Therefore, resin shrinkage can be almost completely absorbed.

As a result, it is possible to maintain the flatness of the molded body and at the same time to prevent the ends of the reinforcement from breaking through the resin.

Therefore, the appearance of the product is not impaired, and the product yield can be improved.

<Description of Examples> FIG. 1 shows a reinforcement used in an example of the present invention. Note that the same parts as in FIG. 3 are given the same reference numerals, and their explanations will be omitted.

In the figure, a reinforcement 1 used in the present invention is an iron pipe having a mouth-shaped cross section.

2 is a synthetic resin end cap formed by injection molding. This end cap 2 is
It is slidably fitted into the reinforcement 1 via a fitting 3.

Furthermore, a buffer member 6 made of porous foam is fitted into the fitting margin 3 .

Note that the length of the fitting margin 3 and the thickness of the buffer member 6 are adjusted to the degree of resin contraction.

The order of forming a rear parcel using the reinforcement configured as described above will be described in detail.

First, as shown in FIG. 2A, the end cap 2 is fitted to both ends of the reinforcement 1 with the buffer member 6 interposed.

Next, as shown in FIG. 2B, the reinforcement 1 is interposed between resin sheets 5 made of a heated semi-molten composite resin (polypropylene resin containing wood powder) or the like. In this state, the lower mold 10
The resin sheet 5 and reinforcement 1 are placed on the resin sheet 5 and the reinforcement 1.

Next, when the upper mold 10a is engaged with the lower mold 10 and sufficient pressure is applied, the thermoplasticized resin sheet 5 surrounds the reinforcement 1 and its joint end is They are mutually fused and integrated.

After that, it is cooled, the upper mold 10a is raised, and the rear parcel is demolded from the lower mold 10, thereby obtaining a rear parcel in which the reinforcement used in the present invention is embedded.

During the molding process or after molding, the resin cooled within the mold contracts.

However, as shown in FIG. 2C, the buffer member 6 prevents the resin from entering the fitting portion 3 and at the same time contracts itself.

As a result, the end cap 2 slides sufficiently and the resin shrinkage is almost completely absorbed.

Therefore, while maintaining the flatness of the molded body, it is possible to prevent the ends of the reinforcement from breaking through the resin.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of the end of the reinforcement used in the present invention, FIG. 2 A is a schematic diagram of the reinforcement used in the present invention, and FIG. 2 B is an explanatory diagram when press-molding a rear parcel according to the present invention. , Fig. 2C is a sectional view of the reinforcement end of the rear parcel according to the present invention, Fig. 3A is a sectional view of the conventional reinforcement end, and Fig. 3B is a sectional view of the rainforce end of the conventional rear parcel. It is a diagram. 1...Rainforce, 2...End cap, 3
...Fit, 6...Buffer member.

Claims (1)

[Claims] 1. A reinforcement is buried between the resin sheets, and small-diameter fitting allowances provided on the end cap are fitted into both ends of the reinforcement, so that as the resin sheet contracts, the end cap is inserted into the reinforcement. In a sliding rear parcel for an automobile, a buffer member is provided around the outer periphery of the fitting area of the end cap, and by bringing the end of the reinforcement into contact with the buffer member, the resin sheet shrinks. A rear parcel for an automobile, characterized in that an end cap slides within a reinforcement while compressing and deforming a buffer member.