JPH0222354Y2 - - Google Patents

Description

[Detailed description of the invention] <Field of the invention> This invention relates to a reinforcing structure for an automobile rear parcel, and in particular to prevent deformation caused by resin contraction during press molding of an automobile rear parcel and protrusion of the ends of the reinforcement. related to things.

<Prior art and its problems> An automobile rear parcel is a member that divides the rear luggage compartment of a hatchback-type passenger car into an upper and lower part, and both side edges of the rear parcel are placed on steps provided on the side of the parcel. It is laid down by this.

In addition, it is necessary for the rear parcel to have sufficient resistance in the direction of loading, so the rear parcel is press-molded integrally with one or more reinforcements laid between resin sheets. Reinforce, which is a reinforcing core material, is embedded and fixed between the resin sheets.

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

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

As a means to solve the above problems, the fourth
As shown in Figure A, synthetic resin end caps 2 formed by injection molding are slidably fitted to both ends of the reinforcement 1, so that resin shrinkage is absorbed by the sliding of the end caps 2. things have been done.

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

For this reason, the rear parcel body part may be distorted,
As shown in FIG. 4B, the end portion 2a of the end cap 2 may break through the resin.

In addition, since a recess 4 is formed in the resin 5 near the fitting margin 3, the appearance is poor, and furthermore, the height of the stepped portion provided on the parcel side for placing the rear parcel is required to be L. It has been pointed out that this step is conspicuous when the rear parcel is not placed, and that it also causes a bad appearance.

《Purpose of the invention》 This invention prevents distortion or protrusion of the reinforcement end after press forming of the above-mentioned rear parcel for automobiles, and improves the appearance of the rear parcel mounting stepped section provided with the parcel side. The purpose is to improve.

《Structure and effects of the invention》 In order to achieve the above objectives, the present invention has the following features:
In a rear parcel equipped with a reinforcement that is embedded and fixed between resin sheets and with end caps slidably fitted to both ends thereof, the upper surface of the reinforcement is extended to form an extension piece integrally, and the extension piece is integrally formed with the extension piece. A flange is integrally formed below the side edge of the piece with a width smaller than the side surface width of the reinforcement, and an extension portion formed by forming a stepped portion between the flange and the side surface of the reinforcement into a tapered shape, and an extension portion of the end portion. The present invention is characterized in that it includes an end cap whose side surface has substantially the same shape and area as the side surface of the extension, and the end cap is slidably fitted into the reinforcement.

According to the above configuration, the extension part can prevent the resin from entering the fitting part between the end cap and the reinforcement.
The end cap can slide smoothly in response to resin shrinkage, and can reliably absorb resin shrinkage.

Furthermore, since the stepped portion between the flange and the side surface of the reinforcement is formed into a tapered shape, resistance to resin contraction is reduced, and resin contraction can be performed more smoothly.

Therefore, the flatness of the molded body can be maintained, and the ends of the reinforcement can be prevented from breaking through the resin, thereby improving the appearance of the product. In addition, since the width of the above flange is smaller than the width of the side of the reinforcement, the step part for placing the rear parcel provided on the parcel side can be made smaller to accommodate the above flange, so the rear parcel can be removed. The appearance of this part of the mushroom can be improved.

<<Description of Examples>> FIG. 1 shows a reinforcement used in a rear parcel according to this invention.

In the figure, reference numeral 1 denotes a reinforcement, and this reinforcement 1 is composed of an iron pipe having a square cross section.

Further, 6 is an extension piece integrally formed by extending the upper surface of the reinforcement 7, and 7 is a flange provided below both side edges of the extension piece 6. The width p of this flange 7 is the width p of the side surface of the reinforcement 1. Width q
It is formed smaller than.

Reference numeral 8 denotes a tapered portion formed by forming a stepped portion between the flange 7 and the side surface of the reinforcement 1 into a tapered shape. Note that the extension piece 6, the flange 7,
The tapered portion 8 is formed integrally with the reinforcement 1 and constitutes an extension portion 9.

Next, reference numeral 10 denotes an end cap made of rubber, aluminum, etc., and an extension part 11 is integrally formed in this end cap 10, and the shape and area of the side surface 11a of this extension part 11 are as follows.
It is designed to be substantially the same as the side surface of the extension part 9 which is made up of the flange 7 and the tapered part 8.

Further, the fitting portion of the end cap 10 with the reinforcement 1 is formed to be slightly smaller than the opening of the reinforcement 1, so that the end cap 10 can slide inside the reinforcement 1.

It should be noted that the length of the fitting portion of the end cap 10 with the reinforcement 1 and the length of the extension portion 11 are of course designed in accordance with the degree of resin contraction. It goes without saying that the length of the extension part 6 is designed so that the rear parcel formed according to the present invention can be placed on the parcel side.

Next, the manufacturing process of the rear parcel according to this invention will be explained.

First, as shown in FIG. 2A, the end caps 10 are fitted onto both ends of the reinforcement 1 in a protruding state. That is, as shown in FIG. 2B, the end cap 10 is fitted with the reinforcement 1 protruding by an amount γ.

Next, as shown in FIG. 2B, the reinforcement 1 with the end cap 10 fitted is placed between a heated resin sheet 5a made of semi-molten polypropylene resin (polypropylene resin containing wood flour) or the like. In this state, the resin sheet 5a and the reinforcement 1 are placed on the lower mold 12.
Next, when the upper mold 13 is engaged with the lower mold 12 and sufficient pressure is applied, the heated and softened resin sheet 5a surrounds the reinforcement 1 and is fused to each other and integrated.

After that, it is cooled, the upper mold 13 is raised, and the rear parcel is removed from the lower mold 12 to obtain the rear parcel according to the present invention in which the reinforcement is embedded and fixed.

Although the rear parcel according to the present invention is obtained as described above, it is inevitable in resin molding that the resin cooled in the mold shrinks during the molding process or after molding.

However, in the present invention, as described above, the end cap 10 can slide within the rain force 1, and the end cap 10 slides against the resin shrinkage, so that the resin shrinkage as described above cannot be reliably absorbed. can.

In other words, the end cap 10 fitted in the state shown in FIG. It is surrounded and covered in a closed state.

Therefore, 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.

Furthermore, as shown in FIG. 3, the thickness of the edge of the rear parcel according to the present invention is
The rear parcel according to the present invention is
The height difference in the step part of the parcel side provided for installation on the parcel side only needs to be equivalent to K above, and it is smaller than before, so the appearance of this part can be improved when the rear parcel is removed. It is.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view of the reinforcement used in the rear parcel according to the present invention, Fig. 2 shows the process of manufacturing the rear parcel according to the present invention, and A is a schematic assembly of the reinforcement used in the present invention. Fig. 3 is an enlarged sectional view showing the end cap fitted into the same reinforcement, C is an explanatory view showing the press forming process, and Fig. 3 is an enlarged sectional view of the end of the reinforcement after forming the rear parcel according to the present invention. 4 shows a conventional rear parcel, A is a partial sectional view of the conventional reinforcement end, and B is a partial sectional view of the conventional reinforcement end of the rear parcel. 1...Reinforce, 9...Extension part, 10...
...end cap.

Claims (1)

[Scope of utility model registration request] A rear parcel having end caps slidably fitted to both ends thereof and a reinforcement embedded and fixed between resin sheets, the upper surface of the reinforcement being extended to integrally form an extension piece, an extension part having a flange integrally formed below the side edge of the extension piece with a width smaller than the side width of the reinforcement, and a stepped part between the flange and the side surface of the reinforcement formed in a tapered shape; 1. A rear parcel for an automobile, comprising: an end cap whose side surface has substantially the same shape and area as the side surface of the extension, and the end cap is slidably fitted into the reinforcement.