JPH0539528Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a molding that is attached to cover the joint line between a vehicle lamp and a vehicle body.

[Conventional technology]

FIG. 1 is a perspective view showing a conventional molding 1, and this conventional molding is injection molded from synthetic resin.

The molding is generally a hollow, elongated member that is gently curved to match the curved surface of the vehicle body.

In the drawing, 2 is a top wall, and 3 is a side wall.

A cross section of this molding 1 is shown in FIG. 5A.

The above-mentioned top wall and side wall are convenient names for explaining the shape of the molding as a single item, and when this molding is mounted on a vehicle body, the top wall is not necessarily placed upward.

In order to attach this molding 1 to the vehicle body, a boss 4 for a mounting screw is integrally molded.

FIG. 5B is a schematic cross-sectional view taken along a plane including the boss 4 described above. As shown in this figure, the top wall 2 and the side walls 3 are continuous at right angles, and the top wall 2 and the boss 4 are parallel.

However, since this molding is a member that also serves as a decoration, it may be constructed in a shape with various design changes. Therefore, the above-mentioned "right angle" and "parallel" are not right angles and parallel in the strict sense of three-dimensional geometry.

In FIG. 5B, the wall thickness is large in the part where the top wall 2, side wall 3, and boss 4 are continuous with each other, so there is a sink S on the surface near this thick part during injection molding.
tends to occur.

Since the side wall 3 is a part that appears on the outside, if a sink mark S occurs on the side wall 3, the commercial value will be significantly impaired.

Therefore, in order to prevent sink marks S from occurring on the surface of the side wall 3, a recess 5 for preventing sink marks is provided on the surface of the top wall 2, as shown in FIG. There is.

FIG. 7 is a cross-sectional view including the recess 5, and corresponds to an enlarged detailed view of FIG. 5B, which is a schematic cross-sectional view.

[The problem that the idea attempts to solve]

By providing the conventional recess 5 shown in FIGS. 6 and 7, the occurrence of sink marks can be reduced, but it is difficult to guarantee that the occurrence of sink marks will never occur.

In FIG. 7, if the depth of the recess 5 is increased in order to more fully prevent the sink mark S', the root of the boss 4 will be cut off, resulting in a strength problem. If it is expanded to the left in the figure, this concave portion will appear on the outside, which is not preferable.

Further, if the recess 5 is enlarged to the right in the figure, the connecting portion between the top wall 2 and the boss 4 will be cut out, which will cause problems in terms of strength.

This idea was created in view of the above circumstances.
The purpose of the present invention is to provide a molding that can completely prevent the occurrence of sink marks on the side wall surface without impairing the appearance or causing problems in strength.

[Means to solve the problem]

The basic idea of the present invention created to achieve the above object is as follows.

As previously explained with reference to FIG. 7, which shows the conventional example, the recess 5 for preventing sink marks cannot be enlarged any further in either the left-right direction or the depth direction. Therefore, in the present invention, this concave portion 5 is enlarged in a direction perpendicular to the paper surface.

A specific configuration based on the above principle will now be described with reference to FIG. 3, which corresponds to an embodiment of the present invention.

The top wall 2 is integrally molded with the side wall 3 and the boss 4.

An opening 8 is provided in the top wall 2 near the boss 4, and a rib 6 is provided between the boss 4 and the side wall 3 to connect them.

[Effect]

When the above-mentioned opening 8 is provided, the section c of the side wall 3 shown in FIG. 3 does not have a large wall thickness.
Does not cause sink marks.

Since the section d is not thick, no sink marks occur.

Since the thickness T of the rib connected to the section e is significantly smaller than the diameter D of the boss 4, no sink marks occur in this section e.

Then, the boss 4 is connected to the vicinity of point a by the top wall 2,
Since the vicinity of point b is supported by the ribs 6, no problems occur in terms of strength.

〔Example〕

FIG. 2 is an explanatory diagram of the shape of the molding according to the present invention.

(a) The top wall 2 and side wall 3 are integrally molded at approximately right angles.

(b) The top wall 2 and the boss 4 are integrally molded to be substantially parallel.

(c) An opening is provided in the top wall 2 at a portion 7 shown with spots (that is, a portion close to the boss 4).

(d) Rib 6 showing boss 4 and side wall 3 with imaginary lines
Connect with. This rib 6 is arranged parallel to the top wall 2 and spaced apart from the lower surface 2a of the top wall 2.

Since this top wall 2 is provided with an opening,
Specifically, the ribs 6 are provided apart from the plane on which the top wall 2 is located.

As described above, by providing openings in the spotted portions 7 and further providing ribs 6, a molding as shown in FIG. 3 is constructed.

A view in the direction of the A arrow is shown in FIG. 1A, and a view in the direction of the B arrow is shown in FIG. 1B, respectively.

In this embodiment, the boss 4 and the side wall 3 are not directly connected to each other as shown in FIG. 3, but are connected through the top wall 2 having an opening 8 and through the rib 6.

The boss 4 is supported by the top wall near point a at its base, and by a rib 6 near point b. For this reason, the boss 4
There is no risk of problems regarding the support strength of the

On the other hand, in the prior art, among the areas f where sink marks were likely to occur on the surface of the side wall 3, area c is close to the opening 8, so there is no risk of sink marks occurring.

Since the thickness of the area d is equal to the original thickness t of the side wall 3, there is no risk of sink marks occurring in this area.

The area e is connected to the rib 6, but since the thickness T of the rib 6 is much smaller than the diameter D of the boss 4, there is no risk of sink marks.

[Effect of idea]

As explained above, according to the molding of the present invention, it is possible to prevent sink marks from occurring on the side wall surface, and there is no risk of any problems in terms of strength. Furthermore, since the aperture, which is a component of the present invention, does not appear on the outside, there is no risk of spoiling the appearance by applying the present invention.

[Brief explanation of the drawing]

1 to 3 show one embodiment of the molding according to the present invention, in which FIG. 1 is a perspective view, FIG. 2 is an explanatory view of the shape, and FIG. 3 is a cross-sectional view. Figures 4 to 7
The figures show a conventional molding, with FIG. 4 being a perspective view, FIG. 5 being a schematic cross-sectional view, FIG. 6 being a partial perspective view, and FIG. 7 being an enlarged detailed cross-sectional view. 1, 1'...Mall, 2...Top wall, 3...Side wall,
4... Boss, 5... Recessed portion, 6... Rib, 7... Part where an opening is provided, 8... Opening.

Claims (1)

[Scope of Claim for Utility Model Registration] A molding made of synthetic resin that is attached to the connection between a vehicle lamp and a vehicle body, which includes a top wall, a side wall that continues approximately at right angles to the top wall, and a molding that includes a A boss that is substantially parallel to the wall surface of the wall is integrally formed, and the side wall is provided with an opening near the connection with the boss, and the side wall is provided with an opening between the boss and the side wall. A molding for a vehicle lamp, characterized in that the molding is connected by a rib that is spaced apart from a plane on which the top wall is located.