JPH058764A - Rear spoiler - Google Patents

Abstract

PURPOSE:To provide a rear spoiler which is hollow so as to satisfy a weight reduction problem, and which can solve both of a problem of spoiling the aesthetic view due to a joint part and a problem of an insufficient strength. CONSTITUTION:An upper member 1 is composed of a long length planar part 13 and a pair of edge parts 11, 12. The edge parts 11, 12 has hollow parts 11a, 12a at least in a part thereof, and a planar lower member 2 is joined to end parts 1b, 1c of the wall parts 111, 121 of the pair of edge parts 11, 12 which are opposed together, below the upper member 1, and the planar part 13, a pair of the wall parts 111, 121 and the lower member 2 define a closed space 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a rear spoiler,
Specifically, it relates to improvement of a hollow rear spoiler.

[0002]

2. Description of the Related Art A rear spoiler is provided at the rear of a vehicle for the purpose of suppressing lift generated in the vehicle at high speeds and giving a pushing force to the vehicle to improve running stability and wheel ground friction. It may be done. As a conventional rear spoiler formed in a hollow shape in order to reduce the weight, as shown in FIG. 4, an upper member 81 constituting an upper side of the hollow portion 80 and a lower side of the hollow portion 80 joined to the upper member 81. And a lower member 82 that constitutes Further, as another conventional rear spoiler, as shown in FIG. 5, a hollow member 91 that constitutes a hollow portion 90 as a whole.
Are also known. The rear spoiler shown in FIG. 4 is obtained by manufacturing the upper member 81 and the lower member 82 by an injection molding method, joining them, and applying the coating to the upper member 81 and the lower member 82. The rear spoiler shown in FIG. 5 is obtained by manufacturing the hollow member 91 by a blow molding method and applying the coating to the hollow member 91.

[0003]

However, in the rear spoiler shown in FIG. 4, although the problem of insufficient strength due to the hollow shape can be solved by the rib 82a protruding from the lower member 82 to the upper member 81 side, for example, the undercut When it is necessary to perform injection molding without configuring the above, the joining portions 83 and 84 of the upper member 81 and the lower member 82 become both ends,
There is an adverse effect that the joint portions 83 and 84 impair the aesthetics when the vehicle is mounted and impair the luxury of the vehicle.

Further, in the rear spoiler shown in FIG. 5, since the hollow member 91 constitutes the hollow portion 90 as it is, the joint portion does not impair the aesthetics, but the hollow member 91 is not provided with ribs inside. For this reason, in this rear spoiler, if it is necessary to avoid the lack of strength due to the hollow shape, an increase in weight due to the increase in thickness and a high tapping sound, which also impairs the luxury feeling of the automobile, are also adversely affected. Will occur.

The present invention has been made in view of the above-mentioned drawbacks of the prior art.
Moreover, it is an object of the present invention to provide a rear spoiler that can simultaneously solve the problem of poor aesthetics due to the joint portion and the problem of insufficient strength.

[0006]

A rear spoiler according to the present invention is formed integrally with a long plate-shaped portion and on both sides of the plate-shaped portion and extends substantially parallel to the longitudinal direction of the plate-shaped portion and projects toward the lower surface side. And a pair of edge portions, which are made up of a pair of edge portions, and an upper member having a hollow portion in at least a part of the pair of edge portions; A substantially plate-shaped lower member, and a closed space is formed by the plate-shaped portion, the pair of wall portions, and the lower member.

The upper member and the lower member are made of a general thermoplastic resin, or a composite material of a general thermoplastic resin (for example, modified PPO (modified polyphenylene oxide)) and glass fiber (GF). can do. The upper member includes a long plate-shaped portion and a pair of edge portions integrally formed on both sides of the plate-shaped portion and extending substantially parallel to the longitudinal direction of the plate-shaped portion and projecting to the lower surface side. The upper member has a hollow portion on at least a part of the pair of edges. The rest of the pair of edges may be solid. Such an upper member can be molded using a thermoplastic resin, for example, by the gas injection injection molding method described in JP-A-50-71756.

The lower member is a substantially plate-like member that is joined to the end portions of the wall portions of the pair of edge portions that face each other below the upper member. This lower member can be molded using a thermoplastic resin by an injection molding method, a blow molding method, or the like. The lower member may be integrally formed with a leg portion for mounting on an automobile. A closed space is formed by the plate-like portions of the lower member and the upper member and the pair of wall portions.

[0009]

In the rear spoiler of the present invention, if the upper member has a hollow portion in at least a part of the pair of edges and the upper member and the lower member are joined, the plate-like portion of the upper member and the pair of edges are joined. Since the closed space is formed by the wall portions facing each other of the portion and the lower member, the hollow portion is lightweight and contributes to material saving.

Further, in this rear spoiler, since the lower member is joined to the end portions of the opposite wall portions of the pair of edge portions projecting from the plate-like portion of the upper member to the lower surface side, these joint portions are mounted on a vehicle. Not noticeable at times. Further, in this rear spoiler, the wall portions facing each other of the pair of edge portions forming the hollow portion and the closed space serve as ribs connecting the upper member and the lower member to maintain the strength, so that the wall thickness can be reduced. Does not cause weight gain. Even if a tapping sound is produced, the ribbed wall portion produces a low tapping sound.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, this rear spoiler has an upper member 1 made of modified PPO and a lower member 2 made of modified PPO joined to the upper member 1. The upper member 1 includes a long plate-shaped portion 13 and a pair of edge portions 11, 12 integrally formed on both sides of the plate-shaped portion 13 and extending substantially parallel to the longitudinal direction of the plate-shaped portion 13 and projecting to the lower surface side. And consists.
The pair of edge portions 11 and 12 are hollow portions 11a and 12 respectively.
It has a and is formed in a continuous ring shape around the plate-shaped portion 13. The upper member 1 is formed by a gas injection injection molding method. That is, as shown in FIG. 2, molds 31 and 32 for forming the cavity 30 are prepared. Then, due to a part of the end portion 1c which has a recessed portion inward from the ring-shaped large space portion of the cavity 30,
The mold 32 is equipped with a gas injection and injection cylinder 42 to communicate with the large space. The gas injection / injection cylinder 42 stores modified PPO (made by GE Plastics, product number: PX-2623) 4 in front of the screw 421, and is connected to a gas injection cylinder (not shown) in the nozzle 422. Each pipe 423 is equipped.
Then, after evacuating the cavity 30, the screw 42
A predetermined amount of the modified PPO4 was injected into the cavity 30 according to No. 1, and then a predetermined amount of compressed air was sent into the cavity 30 through the pipe 423 while injecting the modified PPO4.
Thus, after cooling, the plate-like portion 13 shown in FIG. 1 is formed in the small space portion of the cavity 30, and the hollow portion 11a is formed in the large space portion.
Edges 11, 12 having 12a are formed.

The lower member 2 is a plate-shaped member having a convex portion 21 projecting like a ring around the lower member 2. The lower member 2 is molded by a general injection molding method. The upper member 1 and the lower member 2 thus obtained include the wall portions 111, 12 of the pair of edge portions 11, 12 below the upper member 1 which face each other.
By joining the lower member 2 to the ends 1b and 1c of 1,
The plate-shaped portion 13, the pair of wall portions 111 and 121, and the lower member 2 form a closed space 20. At this time, the convex portions 21 of the lower member 2 are fitted into the concave portions of the end portions 1b and 1c, and the upper member 1 and the lower member 2 are firmly joined. Then, two leg portions 51 and 52 protruding downward are fixed to the lower member 2. After that, the upper member 1, the lower member 2 and the leg portions 51 and 52 are given a predetermined coating to form a rear spoiler. In the rear spoiler, the legs 51 and 52 are attached to the rear portion of the automobile C, as shown in FIG.

This rear spoiler, as shown in FIG.
The upper member 1 has the hollow portions 11a and 12a at the edges 11 and 12, and the closed space 20 is formed by joining the upper member 1 and the lower member 2. Therefore, the hollow member is lightweight and the material is saved. Can also contribute to. Further, in this rear spoiler, the lower member 2 is joined to the end portions 1b and 1c of the wall portions 111 and 121 facing each other, and the runner marks generated when the upper member 1 is molded are lower than the end portions 1b and 1c. Since it is hidden by the joining with the member 2, the joining portion between the upper member 1 and the lower member 2 and the molding mark are inconspicuous even when mounted on the automobile C. Further, even if a tapping sound is generated, the wall portions 111 and 121, which are ribs, produce a low tapping sound.

In this rear spoiler, the hollow portion 1
1a, 12a and edges 11, 12 forming a closed space 20
Since the wall portions 111 and 121 serve as ribs that connect the upper member 1 and the lower member 2 to maintain the strength, the walls are thinned and the weight does not increase. Therefore, by mounting this rear spoiler on the rear portion of the automobile C, it is possible to improve running stability and wheel ground contact friction with excellent durability while being lightweight, and at the same time, it is possible to improve the aesthetics of the joint portion. There is no obstruction and high strength, and it is possible to simultaneously solve the problem of weight increase and high hammering sound. It can be seen that this also has a very important effect of improving the high-class appearance of the automobile C.

In the rear spoiler of the embodiment, the lower members 2 have separate legs 51 and 52, but the lower member 2 and the legs may be integrated, or the legs are required. It may have a shape that does not change. Further, in the rear spoiler of the embodiment, the edge portions 11 and 12 are formed in a continuous ring shape around the plate-shaped portion 13, but the both edge portions 11 and 12 are not ring-shaped and both sides of the plate-shaped portion 13 are formed. And may extend only in parallel.

[0016]

As described above in detail, in the rear spoiler of the present invention, since the upper member has a hollow portion and the upper member and the lower member are joined to each other to form a closed space, the rear spoiler has a hollow shape. It is possible to obtain effects such as light weight. Further, in this rear spoiler, since the joint portion between the upper member and the lower member is inconspicuous even when the automobile is attached, it is possible to eliminate the hindrance of aesthetics due to the joint portion. Further, in this rear spoiler, since the wall portion of the edge portion maintains the strength, the strength is high even if the wall thickness is reduced, the weight does not increase, and the wall portion has a lower tapping sound.

Therefore, when this rear spoiler is installed in an automobile, it is possible to increase the luxury of the automobile with excellent performance due to its light weight, high strength, suitable hitting sound, and suitable aesthetics.

[Brief description of drawings]

FIG. 1 is a cross-sectional view in a width direction of a rear spoiler of an embodiment.

FIG. 2 is a cross-sectional view showing one step of manufacturing the rear spoiler of the embodiment.

FIG. 3 is a perspective view showing a state in which the rear spoiler of the embodiment is installed in an automobile.

FIG. 4 is a cross-sectional view of a conventional rear spoiler in the width direction.

FIG. 5 is a widthwise sectional view of another conventional rear spoiler.

[Explanation of symbols]

1 ... Upper member 13 ... Plate-shaped part 1
1, 12 ... Edges 11a, 12a ... Hollow part 2 ... Lower member
20 ... Closed space 111, 121 ... Wall part 1b, 1c ... Wall part end part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Taiyo Teramoto 1 Ochiai, Nagachi, Kasuga-cho, Nishikasugai-gun, Aichi Prefecture Within Toyoda Gosei Co., Ltd. Address inside Toyota Gosei Co., Ltd.

Claims (1)

Claim: What is claimed is: 1. A long plate-shaped portion and a pair of edges integrally formed on both sides of the plate-shaped portion and extending substantially parallel to the longitudinal direction of the plate-shaped portion and projecting to the lower surface side. An upper member having a hollow portion in at least a part of a pair of the edge portions, and a substantially plate-like member that is joined to opposite wall end portions of the pair of the edge portions below the upper member. A rear member, wherein a closed space is formed by the plate-shaped portion, the pair of wall portions, and the lower member.