JPH0634222Y2 - Wing type air spoiler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an automobile air spoiler, and more particularly to a wing type air spoiler.

(Prior Art) In recent years, air spoilers of various shapes made of plastics such as polyurethane and polypropylene have been mounted on the trunk lid of automobiles in order to increase the high-speed stability of automobiles. Above all, like a wing of an airplane, a wing type air spoiler that tends to float the spoiler main body S from the vehicle body to make the aerodynamic characteristics more effective as shown in FIG. 7 tends to be used.

However, although it is a wing type, it is necessary to fix the spoiler main body S to the vehicle body, and therefore it is necessary to hang the leg F from the lower surface of both ends or the central lower surface, and attach the leg F to the upper surface of the trunk lid or the like.

On the other hand, this air spoiler is made of plastic as described above and is lightweight, but since it has a fairly large cross section and a vehicle width that is substantially the same, its weight is also heavy. Therefore, it has been attempted to manufacture some air spoilers by blow molding to make them hollow (see No. 59-186192, No. 63-37390, etc.).

In blow molding, for example, a thermoplastic resin such as polypropylene is plasticized and melted by an extruder or the like, extruded from a die into a tubular shape or a sheet shape, and sandwiched by a split mold having a desired cavity shape. Compressed air is blown into a cylindrical body or sheet (usually a parison) consisting of, and the parison is expanded and stretched into a mold cavity shape to form a predetermined hollow shape. It can be said that this is an effective means for an air spoiler having a simple cross-sectional shape to be mounted as it is.

(Problems to be solved by the invention) However, in the wing type air spoiler,
As described above, it is necessary to suspend the mounting legs F from the longitudinal ends of the spoiler body and the center lower surface in some cases so that the spoiler body can be floated from the vehicle body. When manufacturing an air spoiler with such mounting legs hanging down by blow molding,
As shown in FIG. 6, since the mounting leg corresponding part of the parison 40 has a locally convex shape, the leg corresponding part has a larger expansion ratio than other general parts, and the side wall of the leg is different. There is a problem that the legs are made thinner than the general part and the strength of the legs is insufficient. In particular, as the angle between the inner surface of the side wall of the leg and the upper surface of the vehicle body, which is the mounting surface, at the tip of the leg approaches an acute angle, the degree of extension of the corner portion of the leg tip increases and the wall thickness becomes thinner. It is possible to mold the air spoiler from a parison with a large diameter and thick wall so that this drawback does not occur, but other general parts except the leg part become unnecessarily thick and the weight becomes large and the spoiler body and leg There is a problem that the product (air spoiler) is likely to be deformed due to the difference in shrinkage amount caused by the non-uniform thickness.

(Means for Solving the Problem) Therefore, the present invention intends to provide a wing type air spoiler having a structure that solves the above-mentioned problems, and the gist thereof is to provide a blow-molded hollow spoiler body. An air spoiler comprising a tubular or box-shaped hollow leg, wherein one end of the hollow leg is provided with a mounting portion for a vehicle body, and the other end is provided with a lid portion for closing the leg and an outwardly extending tension. Providing a protruding portion, the lower surface of the spoiler body is brought into close contact with the lid portion of the leg during blow molding of the spoiler body, and the protruding portion of the leg is held by the lower surface to secure the spoiler body to the hollow leg. It is in the structure of a wing type air spoiler that is characterized.

(Operation) The air spoiler configured as described above has a separate leg with a lightweight leg, which suppresses local bulging (stretching) of the lower surface of the spoiler at its lid portion during blow molding of the spoiler body. Therefore, the spoiler body can be designed in a relatively simple tubular shape, and a lightweight spoiler body having a predetermined uniform wall thickness can be configured with a small parison having a minimum necessary wall thickness when molding. Become. Further, at that time, since the overhanging portion of the leg is fixed so as to be attached to the lower surface of the spoiler main body, the fixing strength between the spoiler main body and the leg does not decrease. On the other hand, even if the leg is hollow, it is easy to design it so as to have a predetermined strength in advance, and the fixing structure between the leg and the vehicle body can be various structures. Therefore, it becomes easy to reduce the weight.

(Examples) Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view passing through a leg of a wing type air spoiler according to an embodiment of the present invention, and FIG. 2 is a vertical sectional view similar to FIG. 1 according to another embodiment.

The air spoiler 10 comprises a leg 12 and a wing-shaped spoiler main body 11, and is fixed so that the spoiler main body 11 is placed on the upper part of the leg 12.

The legs 12 are for mounting the spoiler body 11 in a floating manner on the vehicle body, for example, a trunk lid, and are made of a desired plastic cylindrical body or box body. A lid 13 is formed on the top of the lid so as to close the upper surface of the tubular body or the box, and an overhanging portion 14 is provided on the outer periphery of the lid 13 so as to project outward. The lid 13 and the overhanging portion 14 may be integrally provided from the side wall of the leg 12 as shown in FIG. 1, or the overhanging portion 14 may be provided so as to spread from the upper end of the side wall as shown in FIG. The cover 13 'may be mounted on the expansion protrusion. In the latter case, overhang 14
The lid 13 'is fixed to the upper ends of the legs 12 by interposing an adhesive means (not shown) of a double-sided adhesive tape between the cover 13' and the lid 13 'or by a fixing means such as a tapping screw as shown in FIG. Then, it is preferable to form the lid portion 13. On the other hand, the lower end of the leg 12 is formed in a shape that conforms to the shape of the upper surface of the vehicle body (not shown), and bolts 16 that are means for fixing the vehicle body to the vehicle body (not shown) are fixed at appropriate positions to form a mounting portion to the vehicle body. is doing. The lower end of the leg 12 may be opened as shown in FIG. 1 or may be closed as shown in FIG. Bolt again
The fixing means such as 16 may be inserted through the hole of the mounting piece 17 provided at the lower end of the leg 12, or the head portion such as the bolt 16 may be embedded at the lower end of the leg 12 to form the mounting portion as shown in FIG. .

The lower surface of the hollow spoiler body 11 having a desired cross-sectional shape is fixed to the upper portion of the leg 12. As shown in FIGS. 1 to 4, the fixing portion is configured so that the lower surface of the spoiler main body 11 is in close contact with the upper surface of the leg, that is, the lid portion 13 and the end portion of the projecting portion 14 is wrapped. .

In order to fix the spoiler body 11 and the leg 12 in this manner, as shown in FIG. 5, the leg 12 formed separately in advance is provided on the upper portion, that is, the lid portion 13 and the overhanging portion 14 of the blow molding die 30. The parison 40 is shaped into a predetermined shape of the cavity 31 by blowing compressed air into the parison 40 introduced into the mold so that a part of the parison 40 is projected into the cavity 31. Stick it to the upper part of leg 12,
In addition, it is formed by being attached to the overhanging portion 14. At this time, since the upper part of the leg 12 is closed by the lid body 13 ′ and the like as described above, the parison only adheres to the upper surface of the parison and is attached to the overhanging part 14 of the upper part of the leg 12 without being locally stretched. Become. When the overhanging portion 14 of the leg 12 and the lid portion 13 (lid 13 ') are made of the same or similar plastic that can be heat-welded to the ballison 40, the overhanging portion 14 is held by the heat retained by the parison 40. Also, the surface of the lid portion 13 is partially welded to the parison 40, and more firmly fixed to the molded spoiler body 11. Of course, the projecting portion 14 of the leg 12 is not limited to the above, and may be constituted by the peripheral edge of the lid 13 'as shown in FIG.

(Effect) Since the present invention is configured as described above, it is easy to give a predetermined strength to the leg and it is possible to form the spoiler body from a small parison of the minimum necessary, so that as a whole It was possible to provide a wing type air spoiler with uniform thickness and lighter weight.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view through a leg of the first embodiment of the present invention, FIG. 2 is a sectional view similar to FIG. 1 of the second embodiment, FIG. 3 and FIG.
The figure is an enlarged cross-sectional view showing an example of the connection between the leg upper part and the spoiler body, Fig. 5 is a cross-sectional view of a mold and a parison for molding the article (spoiler) of the present invention, and Fig. 6 is a conventional article (spoiler) molding method. FIG. 7 is a cross-sectional view of the mold and the parison, and FIG. 7 is a perspective view showing a mounted state of the air spoiler. Brief description of symbols 10 …… Air spoiler, 11 …… Spoiler body 12 …… Leg, 13 …… Lid part, 14 …… Overhang part 30 …… Mold, 31 …… Cavity, 40 …… Parison

Claims (1)

[Scope of utility model registration request] 1. An air spoiler comprising a blow-molded hollow spoiler main body and a tubular or box-shaped hollow leg, wherein one end of the hollow leg is provided with a mounting portion for a vehicle body and the other end is provided. A lid portion that closes the leg and an overhang portion that extends outward are provided, and the lower surface of the spoiler body is brought into close contact with the leg lid portion during blow molding of the spoiler body, and the leg overhang portion is formed by the lower surface. A wing type air spoiler in which the spoiler body is fixed to the hollow legs so as to be hugged.