JP6423682B2 - Decoration for steering - Google Patents

Description

  The present invention relates to a decoration for steering provided as a decoration on a steering wheel mounted on a vehicle or the like.

  In recent years, in the field of vehicles, when it is roughly divided into so-called popular cars and luxury cars, the popular cars also use inexpensive parts. It is being requested.

  At this time, for example, even in a steering wheel for a vehicle, one in which a decorative portion is provided on a steering wheel rim by using a two-color molding technique is known (for example, see Patent Document 1).

  In addition to such a steering wheel rim, for example, it is also conceivable to dispose a resin decoration on a spoke portion that is not involved in the function of an airbag, a horn switch, or the like.

  FIG. 6 (A) shows such a decorative ornament 1 for steering, which has a substantially rectangular cylindrical shape when viewed from the front, is located on the outside, and has a first resin component 2 made of silver primary resin and an inside. And a second resin component 4 made of black secondary resin. The first resin component 2 and the second resin component 4 of the decorative ornament 1 for steering are for improving the decorativeness of the entire steering wheel by changing the color inside and outside, and the colors are the above-mentioned silver / black It is not limited to.

  The first resin component 2 is molded by a two-color molding (double mold) primary molding die, and the second resin component 4 is molded by the two-color molding secondary molding die so as to overlap the first resin component 2. Has been.

Japanese Patent Laid-Open No. 10-250519

  However, in the above prior art, as shown in FIG. 6C, for example, the secondary resin of the second resin component 4 is poured into the recess 2 a formed in the first resin component 2, so that the secondary resin A wall surface 2b that goes straight to the front end side (downstream side) with respect to the flow direction of the side resin (see arrow a) is an interface between the first resin component 2 and the second resin component 4.

  For this reason, when the secondary resin is poured into the recess 2a, the pressure causes the wall 2b of the recess 2a to sink into the wall 2b so that the secondary resin pushes in, and the front end surface (downstream end surface) 4a of the second resin component 4 is pushed. And the wall surface 2b has a difference in the amount of sinking T, and as shown in FIG. 6B, the front end surface (downstream end surface) 4a of the second resin component 4 and the wall surface 2b do not coincide with each other. There has been a problem that the appearance of the double appearance looks like a ripple.

  In optimizing the decorative item for steering having such a configuration, when the second resin part is molded into the first resin part, the pressure of the secondary resin from the second resin part toward the first resin part Therefore, the first resin component is pushed in and is inserted into the interface portion between the second resin component and the first resin component, and it is required to be molded so that the interface portion does not appear to be deformed or broken.

  An object of the present invention is to disperse the pressure applied to the first resin component by the second resin component, and to prevent the second resin component from entering the first resin component, and to prevent apparent deformation and breakage. It is in.

  In order to achieve the above-described object, the decorative item for steering according to the present invention includes a first resin component molded by molding a primary resin, and a secondary resin so that at least a part of the first resin component overlaps the first resin component. A second resin part molded by the molding process, and is a decoration for a steering wheel attached to a steering of a vehicle, and among the first resin parts, on the mating surface of the second resin part, A first taper surface having a shape protruding from the second resin component is provided.

  The decoration for steering includes, for example, a first resin component that is located on the outside and made of a primary resin, and a second resin component that is located on the inside and made of a secondary resin. The first resin component and the second resin component are molded by two-color molding (double mold), and the first resin component is molded by a molding process of a primary molding die using a primary side resin. The part is molded by a molding process of a secondary molding die of two-color molding using a secondary side resin so that at least a part of the part overlaps the first resin part.

  Here, the first resin component is integrally provided with a first taper surface having a shape protruding from the second resin component on a mating surface with the second resin component.

  In the decorative article for steering of the present invention, the second resin component has a flat portion (pressing allowance) at the distal end portion on the inflow side of the secondary side resin with respect to the second tapered surface fitted to the first tapered surface. As an overlap portion).

  In other words, the second resin component is integrally provided with the first resin component and the first resin component by integrally including a flat plate-like portion positioned at the distal end portion on the inflow side of the secondary resin with respect to the second taper surface that is fitted to the first taper surface. The outer peripheral circle of the flat plate-like portion that is not involved in the interface during molding with the two resin parts can be an apparent boundary with the first resin part, and the appearance can be improved.

  In the decorative item for steering according to the present invention, the first resin component has a cylindrical portion that is reduced in diameter toward the rear surface side from the front surface side of the steering wheel, and a front surface side end of the cylindrical portion that is on the front surface side of the steering wheel. And a flange portion that extends continuously in a plane direction of the steering, and the second resin component includes a cylindrical portion that overlaps inside the cylindrical portion of the first resin component, and the first resin component. A flange portion that overlaps a part of the outer side of the flange portion, and the first taper surface and the second taper surface are inclined so as to spread toward the front surface side of the steering at each flange portion. The front end of the flat plate portion forms an apparent boundary with the flange portion of the first resin part inside the outer peripheral end of the flange portion of the first resin component. .

  That is, the first resin component includes a cylindrical portion that is reduced in diameter toward the rear surface side from the front surface side of the steering wheel, and a flat surface of the steering wheel that is continuously on the front surface side end portion of the cylindrical portion on the front surface side of the steering wheel. A first tapered surface having a shape protruding from the second resin component is integrally provided on a mating surface of the flange portion extending in the direction and the second resin component.

  On the other hand, the second resin component has a cylindrical portion that overlaps with the inside of the cylindrical portion of the first resin component, a flange portion that overlaps with a part of the outside of the flange portion of the first resin component, and a second taper surface. And a flat plate-like portion that is positioned at the front end portion on the inflow side of the secondary side resin from the tapered surface.

  Thereby, the outer periphery circle | round | yen of the flat plate-shaped part which does not participate in the interface at the time of shaping | molding with a 1st resin component and a 2nd resin component can be made into an apparent boundary with a 1st resin component, and it can improve appearance. it can.

  According to the present invention, the pressure applied to the first resin component by the second resin component can be dispersed, and the second resin component can be prevented from entering the first resin component, thereby preventing apparent deformation and breakage. Can do.

It is a front view of a steering wheel provided with the decoration for steering of the present invention. It is a front view of the decoration for steering of the present invention. It is sectional drawing which follows the AA line of FIG. (A) is an enlarged front view of the principal part, (B) is an enlarged sectional view of the part enclosed by B part of FIG. It is sectional drawing which shows the modification of the decoration item for steering of this invention. (A) is a front view of a conventional decorative ornament for steering, (B) is an enlarged front view of the main part, and (C) is an enlarged cross-sectional view along the line CC in FIG. 6 (A).

  Next, a decorative ornament for steering according to an embodiment of the present invention will be described with reference to the drawings. In addition, although embodiment shown below is a suitable specific example in the decoration for steering of this invention, and there may be various technically preferable restrictions, the technical scope of this invention is especially this invention. Unless otherwise specified, the present invention is not limited to these embodiments. In addition, the constituent elements in the embodiments shown below can be appropriately replaced with existing constituent elements and the like, and various variations including combinations with other existing constituent elements are possible. Therefore, the description of the embodiment described below does not limit the contents of the invention described in the claims.

  In the figure, the steering wheel 10 is used in a state inclined at a predetermined angle with respect to the vehicle body. Hereinafter, the surface of the steering wheel 10 shown in FIG. 1, that is, the surface facing the driver is the surface. In the following description, the opposite side is the back side, the upper side in FIG. 1 is the (vehicle body) upper side, the lower side of the page is the (vehicle body) lower side, and the left and right sides of the page are (vehicle body) left and right.

  As shown in FIG. 1, the steering wheel 10 includes an annular rim portion 12 for a driver to hold and perform a driving operation, an airbag module portion 14 disposed in the center of the rim portion 12, and a rim portion 12. Between the airbag module 14 and the airbag module 14, that is, a spoke portion 16 disposed in a three-pronged manner in the left and right direction of the vehicle body with respect to the steering position in the straight traveling state of the vehicle, and one of the spoke portions 16 positioned below the vehicle body And a steering decoration 20 constituting the part.

  The rim portion 12 is attached to a metal boss portion fixed to a steering column shaft (not shown). As a result, the rim portion 12 is connected to the boss portion via the spoke portion 16.

  Although the detailed cross-sectional structure is omitted, the rim portion 12 includes an annular core metal fixed to the outer end of the spoke portion 16, a foaming agent such as urethane covering the core metal, and a skin. The rim portion 12 is formed by forming urethane foam on the core metal including the spoke portion 16 by insert molding or the like, with at least the entire circumference of the rim portion 12 covered with the skin in a state where the core metal is assembled to the spoke portion 16. is there. In addition, the formation of the cushion body and the like for the rim portion 12 and the spoke portion 16 is not limited to urethane foam.

  The airbag module section 14 has an airbag apparatus including an inflator, an airbag, etc. (not shown), and is mounted on the boss section by a known configuration and attachment. Omitted. The airbag module unit 14 is mounted so as to be able to approach and separate from the boss portion, and has a function as a horn operation unit of a horn mechanism that sounds an alarm sound by a driver's pressing operation.

  The steering decoration 20 has a substantially rectangular cylindrical shape when viewed from the front. As shown in FIGS. 2 and 3, the first decorative resin component 22 made of silver primary resin is positioned on the outer side, and the inner side is positioned on the inner side. And a second resin component 24 made of a black secondary resin. The first resin component 22 and the second resin component 24 are molded by two-color molding (double molding), and the first resin component 22 is molded by a primary molding die (not shown) using a primary side resin. The second resin component 24 is molded by a two-color molded secondary molding mold using a secondary resin so that at least a part of the second resin component 24 overlaps the first resin component 22.

  The first resin component 22 is steered continuously from the front side of the steering wheel 10 and from the front side end of the cylindrical part 22a. A flange portion 22b extending in the plane direction of the wheel 10 and a first taper surface 22c having a shape protruding from the second resin component 24 are integrally provided on a mating surface of the second resin component 24.

  The second resin component 24 includes a cylindrical portion 24a that overlaps inside the cylindrical portion 22a of the first resin component 22, a flange portion 24b that overlaps a part of the outer side of the flange portion 22b of the first resin component 22, and a first tapered surface. And a flat plate-like portion 24d positioned at the leading end portion on the inflow side of the secondary side resin from the second tapered surface 24c fitted to 22c.

  The first tapered surface 22c and the second tapered surface 24c are inclined so as to spread on the surface side of the steering wheel 10 at the flange portion 22b and the flange portion 24b.

  The front end of the flat plate-like portion 24 d forms an apparent boundary with the flange portion 22 b of the first resin component 22 inside the outer peripheral end of the flange portion 22 b of the first resin component 22. At this time, the flat portion 24d may have a very small width W of, for example, about 0.3 mm from the outer peripheral end to the front end of the first tapered surface 22c.

  In addition, as a shaping | molding method by two-color shaping | molding (double mold), a well-known shaping | molding method, for example, the shaping | molding method which puts two metal mold | dies in one molding machine, and can shape | mold can be used.

  At this time, the primary molding mold for molding the first resin component 22 and the secondary molding mold for molding the second resin component are configured such that one (for example, convex side) of each mold can be rotated by a rotary table. The other mold (for example, the concave side) is molded so that it can approach and separate from the one side.

  Specifically, the other mold is brought close to one mold side, and the primary molding mold and the secondary molding mold are simultaneously clamped, and the primary side resin is injected only into the primary molding mold. .

  Next, the mold is opened, and one mold is rotated 180 degrees on the rotary table (the rotation rate varies depending on the product), and the first resin part 22 molded with the primary mold is turned into the secondary mold. And move.

  Then, mold clamping and injection are performed again, and two-color molding is performed by pouring a secondary side resin (or the same material that differs only in color) from the first molding onto the first resin component 22 by secondary molding. The steering decoration 20 is formed. Further, when performing secondary clamping and injection, production efficiency can be improved by performing clamping and injection on the primary side at the same time.

  Here, when silver PP (polypropylene) is used for the primary side resin constituting the first resin component 22 and black PP is used for the secondary resin constituting the second resin component 24, the injection pressure of the resin is increased. As a result, the second resin component 24 tends to be pushed (submitted) near the interface of the first resin component 22. In the above description, silver PP (polypropylene) is used for the primary side resin and black PP is used for the secondary side resin. However, the second resin part 24 can be welded to the first resin part 22. If so, the material is not particularly limited.

  However, in the present embodiment, the mating surface of the first resin component 22 with the second resin component 24 is different from, for example, a conventional perpendicular step shown by a two-dot chain line in FIG. By providing the taper-shaped first tapered surface 22c that protrudes toward the second resin component 24, it is difficult to cause subsidence. Note that the angle θ is an angle that does not go straight to the distal end side (downstream side) with respect to the flow direction of the secondary resin (see arrow a), and is about 30 ° in the present embodiment. On the other hand, the angle is not particularly limited as long as the secondary side resin is difficult to sink. In this case, for example, as shown in FIG. 5, the first tapered surface 22c may be formed in an R shape (arc shape).

  In addition, since the second resin component 24 includes the flat plate-like portion 24d at the front end portion on the inflow side of the secondary side resin from the second taper surface 24c fitted to the first taper surface 22c, the flat plate-like portion 24d. An apparent boundary between the first resin component 22 and the second resin component 24 on the outer side of the first tapered surface 22c can be formed at the tip (outer peripheral edge).

  Thereby, the outer periphery circle | round | yen of the plate-shaped part 24d which is not concerned in the interface at the time of shaping | molding with the 1st resin component 22 and the 2nd resin component 24 can be made into an apparent boundary with the 1st resin component 22, and appearance is good. Can be improved.

  In the above description, the steering decoration 20 has been disclosed as a rectangular cylinder disposed on the spoke portion 16 on the lower side. However, the shape and color are not limited thereto, and for example, a T-shape in front view. The present invention may be applied to steering decorations that overlap on the outside and the inside, such as a shape.

  In addition to those already described above, the methods according to the above-described embodiments and modifications may be used in appropriate combination.

  In addition, although not illustrated one by one, the present invention is implemented with various modifications within a range not departing from the gist thereof.

DESCRIPTION OF SYMBOLS 20 Steering decoration 22 1st resin part 22a Tube part 22b Flange part 22c 1st taper surface 24 2nd resin part 24a Tube part 24b Flange part 24c 2nd taper surface 24d Flat part

Claims (2)

A first resin component molded by molding a primary side resin;
A second resin part molded by molding a secondary resin so that at least a part of the first resin part overlaps;
Composed of
A steering decoration that is attached to the steering of a vehicle,
Among the first resin components, a first taper surface having a shape protruding from the second resin component is provided on the mating surface of the second resin component ,
The second resin component is
A steering decoration , comprising a flat plate-like portion at a front end portion on the inflow side of the secondary side resin with respect to the second tapered surface that is fitted to the first tapered surface . In the steering ornament according to claim 1 ,
The first resin component is
A cylindrical portion that reduces in diameter toward the back side from the front side of the steering;
A flange portion that is on the front surface side of the steering wheel and continuously spreads from the front surface side end portion of the cylindrical portion in the planar direction of the steering wheel;
With
The second resin component is
A cylindrical portion overlapping inside the cylindrical portion of the first resin component;
A flange portion overlapping with a part of the outside of the flange portion of the first resin component;
With
The first taper surface and the second taper surface are inclined so as to spread toward the front surface side of the steering at each flange portion,
A steering wheel characterized in that an end of the flat plate portion forms an apparent boundary with the flange portion of the first resin part inside an outer peripheral end of the flange portion of the first resin part. For decoration.

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