JPS633876Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a steering wheel for an automobile or the like.

(Prior Art) Conventionally, as shown in FIG. 5, as shown in FIG. 4, the core metal 2 of the grip portion 1 and the core metal 4 of the spoke portions 3 are covered with an outer layer 6 made of soft synthetic resin, and a horn pad 7 is disposed on the boss 5.

However, according to such a structure, the outer layer 6 is made of soft synthetic resin except for the core metal 2 of the grip part 1 and the core metal 4 of the spoke parts 3, and especially the spoke parts 3
The majority of these are soft synthetic resins.
Therefore, sink marks, deformation, partial destruction, damage due to external stress, etc. are likely to occur in thick parts such as the spoke parts 3.

When trying to solve these points by changing the density of the soft synthetic resin of the outer layer 6, the density becomes denser,
This is undesirable as it increases the weight of the steering wheel.

For this reason, in the steering wheel as shown in FIG. 5, it has been considered to attach a core material to the core metal of the pair of spoke portions to prevent sink marks and increase strength.

For example, as shown in Japanese Unexamined Patent Publication No. 57-58556, a core material made of hard synthetic resin is fitted to the core metal of a pair of spokes, that is, the core metal is inserted and buried in the core material. Are known. However, according to this method, the core metal of the spoke portion must be inserted into the core material, which inevitably results in poor workability and an increase in weight.

Furthermore, as shown in Japanese Utility Model Application Publication No. 55-110371, it is known that hollow core members made of synthetic resin are respectively attached to the core metals of a pair of spoke parts. However, in this case, when the outer layer is molded, the inside of the hollow core material is filled with synthetic resin by injection molding, so it cannot be expected to reduce the weight.

(Problems to be Solved by the Invention) As described above, in the case where the core material is attached to the core metal of the pair of spoke parts, there is still a problem in terms of weight reduction.

The present invention is an attempt to solve the above-mentioned problems, and aims to reduce weight while reliably preventing sink marks and deformation in a pair of spoke parts.

[Effect of idea]

(Means for Solving the Problems) The present invention provides a steering wheel in which a grip part 1 and a boss 5 are connected by a core metal 4 of a pair of spoke parts 3 having an angle with each other. A core material 8 of a blow-molded hollow body 9 made of a hard synthetic resin with hooks 11 integrally formed on both sides of the core bar 4 is installed on the core bar 4 of No. 3, and its outer surface is It is coated with an outer layer 6 made of soft synthetic resin.

(Function) In the present invention, the thickness of the outer layer 6 is made uniform by the core material 8 of the hollow body 9 between the pair of spoke parts 3, and the core material 8 has a shape corresponding to the entire thick part. This achieves sufficient weight reduction.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. Note that parts corresponding to those in FIG. 5 will be described with the same reference numerals.

The core bar 2 and boss 5 of the annular grip portion 1 are
Core metal 4 of a pair of spoke parts 3 having angles with each other
Connect by welding. In this case, as shown in the figure, the core metals 4 of the pair of spoke parts 3 are integrally formed, and both outer ends are welded and fixed to the core metal 2 of the grip part 1, and the middle part is welded and fixed to the boss 5. Alternatively, the core metals 4 of the pair of spoke parts 3 may be formed separately, and both ends thereof may be welded and fixed to the core metal 2 of the grip part 1 and the boss 5.

Moreover, the core material 8 is engaged with the core metal 4 of the pair of spoke parts 3 and constructed. This core material 8 has a hollow body 9 formed by blow molding a hard synthetic resin, and clamping claws 11 having core metal engaging portions 10 inside are provided along both side edges of the hollow body 9. It is formed in one piece. Then, the core metal engagement parts 10 on both side edges of the hollow body 9 are engaged with the core metal 4 of the pair of spoke parts 3 by the clamping claws 11, and the core metals 2, 4 and the boss 5 are engaged.
At the same time, an outer layer 6 is integrally molded and coated with a soft synthetic resin on the outer surface of the core material 8. Note that a horn pad 7 is placed on the boss 5.

By embedding the core material 8 made of the hollow body 9 between the pair of spoke parts 3 in this way, the thickness of the soft synthetic resin of the outer layer 6 is made uniform, preventing sink marks, and the thickness of the core material 8 made of the hollow body 9 is buried between the pair of spoke parts 3. By forming the core material 8 in a shape corresponding to the entire thick-walled portion and burying it, it is possible to achieve sufficient weight reduction, and also to reduce the amount of raw materials due to the hollow space. . In addition, by fixing the core material 8 to the core metal 4 using the clamping claws 11 on both sides of the core material 8, the core material 8 can be
It is easy to attach the outer layer 6, and the outer layer 6 can be molded reliably without being fluctuated by the molding pressure during molding.

[Effect of idea]

According to the present invention, by embedding a core material made of a hollow body between a pair of spoke parts, the soft synthetic resin of the outer layer can be made thin and uniform, and while preventing sink marks, the thickness of the core material between a pair of spoke parts can be made uniform. By forming a core material in a shape that corresponds to the entire part that will become the part and burying it, it is possible to achieve sufficient weight reduction, and also to reduce the amount of raw material due to the hollow space. In addition, by fixing the core material to the core metal using the hooks on both sides of the core material, it is easy to attach the core material, and molding can be performed reliably without fluctuations due to molding pressure during molding of the outer layer. .

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the steering wheel of the present invention, Fig. 2 is a cross-sectional view of the section shown in Fig. 1, Fig. 3 is a perspective view of the core, and Fig. 4 is a front view thereof. FIG. 5 is a front view of a conventional steering wheel. 1...Grip part, 3...Spoke part, 4...
Core metal, 5... Boss, 6... Outer layer, 8... Core material, 9
...Hollow body, 11...Grasping claw.

Claims (1)

[Utility Model Registration Claim] A steering wheel in which a grip portion and a boss are connected by a pair of core metals of spoke portions which are angled from each other, characterized in that a blow-molded hollow core material made of hard synthetic resin is suspended over the core metals of the pair of spoke portions and has clamping claws formed integrally with the core metals along both side edges, and the outer surface of the core material is covered with an outer layer made of soft synthetic resin.