JPH10287246A - Steering wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steering wheel which can prevent turning up of the end of a cover member and deteriorating of attraction in an outward appearance when the cover member is contracted. SOLUTION: Since an end 13a of a cover member 13 is extended to a side of a hard resin 9 to be secured, even when the cover member 13 is pressed in the vicinity of its end 13a, it is prevented from being turned up. The cover member 13, by securing its end 13a to the hard resin 9, is firmly secured. A connection part of a soft resin 9 and a hard resin 11 can be concealed to be covered with the cover member 13, attraction of outward appearance is prevented from deteriorating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering wheel, and more particularly to a combination type steering wheel having grip portions on both left and right sides.

[0002]

2. Description of the Related Art In a combination type steering wheel, a grip portion is distinguished from other portions by forming the entire rim portion of a hard synthetic resin or forming the entire rim portion of a soft synthetic resin. For this reason, a structure is adopted in which cover members are provided only on the left and right grip portions. As a method of manufacturing this type of steering wheel, a core metal of a rim portion and a spoke portion is set in a molding die, a hard or soft resin material is injected into the molding die, and a core metal of the rim portion and the spoke portion is formed. Cover with hard or soft resin. A cover member made of natural leather with neoprene rubber as a cushioning material attached to the back surface is attached to the surface of the rim portion manufactured in this manner by sewing the inner peripheral surface side of the ring portion under tension. Have been. (Refer to Japanese Utility Model Publication No. 7-9729 as a similar technique).

[0003]

However, in such a conventional technique, the entire rim portion is formed of a soft synthetic resin and the cover member is disposed on the surface of the soft resin. Pressing the cover member near the terminal may cause the terminal to be turned up. In the case where the rim portion is formed of a hard resin and a cover member made of natural leather having a back surface bonded with neoprene rubber as a cushioning material is disposed on the surface of the hard resin, the hardness or thickness of the elastic body is Depending on the case, there is a possibility that a feeling of bottoming may be caused when the handle cover is strongly gripped.

The present invention has been made by paying attention to such a conventional technique, and provides a steering wheel capable of preventing the cover member from being turned up at the end of the cover member and preventing the feel when pressing the cover member from being lowered. Is what you do.

[0005]

According to the first aspect of the present invention,
In a combination type steering wheel, a core metal other than the left and right grip portions in the rim portion is coated with a hard resin, each core metal of a grip portion and a spoke portion is coated with a soft resin, and a cover member is provided on the surface of the soft resin. The terminal of the cover member extends to the hard resin side and is fixed to the hard resin.

Here, "hard resin" refers to ABS, engineering plastic / ABS alloy, POM, PA, PAR, PSF,
Thermoplastic resins such as PES, PET, PC, PPE, PBT and PP are suitable. Most preferred are glass fiber containing ABS resins. The content of the glass fiber in the ABS resin is preferably 5 to 15% by weight. And
As the "soft resin", a thermosetting resin and a thermoplastic resin can be used. Typical examples of the former are urethane foam resins, and examples of the latter are low-hardness thermoplastic elastomers. Most preferred is a urethane foam resin having a density of 0.6 to 0.9. The preferred glass fiber-containing ABS resin has the following properties in order to satisfy the workability of injection molding and the resistance to environmental stress cracking.

(0) Glass fiber content 5
15wt% (1) Glass fiber length in molded product 0.2-2.8mm (2) Melt flow rate (JIS K7210, 220 ℃, 10
(Kg load) 4 ~ 60g / 10min (3) Tensile strength (ASTM ・ D638) 550 ~ 800kgf / c
m ² (4) Coefficient of linear expansion (3-6) X1
According to 0 ^-5 cm / cm ℃ invention of claim 1, wherein, since the terminal of the cover member is fixed extends to hard resin side, never terminal turned up by pressing the vicinity of the terminal of the cover member. Further, since the terminal of the cover member is fixed to the hard resin, the terminal is firmly fixed. In addition, the joint between the soft resin and the hard resin can be covered and hidden by the cover member, and the appearance does not deteriorate.

According to the second aspect of the present invention, the means for fixing the terminal of the cover member is an adhesive.

According to the second aspect of the present invention, since the fixing means of the end of the cover member is an adhesive, the cover member is reliably prevented from idling.

According to a third aspect of the present invention, a circumferential groove is formed at the end of the hard resin, and the end of the cover member is bent and pushed into the groove.

According to the third aspect of the present invention, since the end of the cover member is bent and pushed into the groove of the hard resin, the end of the cover member is completely prevented from being turned up, and the cover member is also prevented from spinning. Is prevented.

In the invention according to claim 4, the groove is formed obliquely with respect to the circumferential direction.

According to the fourth aspect of the present invention, since the groove is formed obliquely with respect to the circumferential direction, the idling of the cover member is more reliably prevented.

According to the fifth aspect of the present invention, the bending degree of the terminal of the cover member is 0.6 to 1.5 mmR.

According to the fifth aspect of the present invention, since the degree of bending of the end of the cover member is small (0.6 to 1.5 mmR) and bent at substantially a right angle, the end of the cover member and the edge of the groove are not bent. There is no gap between them. Therefore, there is no possibility that the driver's nail may be caught.

According to a sixth aspect of the present invention, an extension is formed at the end of the hard resin to enter the lower side of the soft resin, and a projection or a recess is formed on the extension to engage with the soft resin. Things.

According to the sixth aspect of the present invention, since the extension formed at the end of the hard resin has a protrusion or a recess which engages with the soft resin, the connection between the hard resin and the soft resin is reduced. Be certain. Further, since the extension is hidden by the soft resin, there is no problem in appearance.

In the invention according to claim 7, a decorative material is provided on the surface of the hard resin. Here, as a method of forming the "decorative material", for example, a pattern such as a woodgrain pattern is transferred by fluid printing, and thereafter, a fluid printing method of applying a clear coating on the surface, and a thin sheet of wood is attached with an adhesive. Veneer method, AB
Spray painting on S-resin surface or painting method in which paint is in-molded on the inner surface of mold before molding, film in-molding method in which pre-formed film is in-molded in mold, hard in decoration solution There is a dipping method for forming a decorative layer by sinking a resin portion.

According to the seventh aspect of the present invention, since the decorative material is provided on the surface of the hard resin, the appearance of the hard resin is good.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 to FIG. 6 are views showing a first embodiment of the present invention. Reference numeral 1 denotes a combination type steering wheel, which comprises an annular rim portion 2, a boss portion 3 forming a central portion, and a spoke portion 4 connecting the rim portion 2 and the boss portion 3. A pipe-shaped metal core 5 is provided inside the rim portion 2, a metal core 6 having another shape is provided inside the spoke portion 4, and a base 7 is provided inside the boss portion 3. .

The rim portion 2 is covered with hard resins 9 and 10 except for portions corresponding to the left and right grip portions 8.
The spokes 4 are covered with a soft resin 11.
In this embodiment, an ABS resin containing glass fiber (GF) is used as the hard resins 9 and 10, and urethane foam is used as the soft resin 11.

The surface of the hard resins 9 and 10 is provided with a wood-grain decorative material 12. The decorative material 12 is formed by a fluid printing method. Leather 13 as a “cover member” is adhered to the surface of the soft resin 11, and a terminal 13 a of the leather 13 extends to the hard resin 9, 10, and is attached to an end of the hard resin 9, 10. It is pushed into the formed groove portion 14 in a bent state via an adhesive. The adhesive used here is a two-component urethane-based adhesive.
The groove 14 is formed obliquely with respect to the circumferential direction to prevent the leather 13 from spinning.

Further, the hard resins 9 and 10 include soft resin 1
1 is formed with a cylindrical extension portion 15 which enters into the lower side, and a convex portion (a concave portion is also possible) 16 which engages with the soft resin 11 is formed around the extension portion 15. The engagement between the convex portion 16 and the soft resin 11 causes the hard resin 9, 10
And the end of the soft resin 11 is securely connected.

Next, a method of manufacturing the steering wheel 1 will be described. First, the core metals 5, 6 of the rim portion 2 and the spoke portion 4 are set in an injection mold, and an ABS resin containing glass fibers is injected into the mold. The glass fiber content in the ABS resin is 10% by weight. In the gate G for injecting the ABS resin, the upper hard resin 9 is provided on one extension 15, and the lower hard resin 10 is formed on one extension 15.

Therefore, the flow length L1 of the upper hard resin 9
Is 510 mm, but since the glass fiber content of the ABS resin is 10 wt%, the fluidity is very good, and reliable injection into the mold can be performed.

The flow length L 2 of the lower hard resin 10 is 200
mm, and in this case, there is no problem in the fluidity of the ABS resin. As described above, since the hard resins 9 and 10 can be formed by injection molding that can be mass-produced, the hard resins 9 and 10 can be easily manufactured. Further, since there is only one gate G for the upper hard resin 9 and one gate G for the lower hard resin 10, there is no problem in strength. Through the above-described injection molding process, core metals 5 and 6 covered with hard resins 9 and 10 are obtained (see FIG. 2). Incidentally, when the hard resin 9 and 10 portions are long in design,
Alternatively, when the glass fiber content is large, the gate G for injecting the ABS resin is connected to the extension portions 15 on both sides of the hard resin
May be provided respectively.

Next, the metal cores 5, 6 partially covered with the hard resins 9, 10 are set in another mold 17 (see FIG. 6), the soft resin material 11 is injected, and the grip 8 and the spokes are formed. The core metals 5 and 6 of the part 4 are covered with a soft resin 11. As a result, the core metals 5, 6 are covered with the hard resins 9, 10 and the soft resin 11 (see FIG. 3). When injecting the soft resin 11, the soft resin 11 foams in the mold and the hard resin 9,
Since the shape corresponds to the convex portion 16 of the extension portion 15 of the ten, the convex portion 16 is engaged with the soft resin 11. In addition, although gate marks when the hard resins 9 and 10 are injection-molded are left on the extension portion 15, the gate marks are covered with the soft resin 11, so that the appearance is also excellent.

Further, as shown in FIG.
Mold 17 at a portion corresponding to the boundary between soft resin 11 and soft resin 11
Is provided with an elastic body 18, which is in contact with the edge E1 of the hard resin 9, 10 with a constant elastic force, so that the urethane material does not leak from the edge E1 and generate burrs. .

Then, a wood-grain decorative material 12 is applied to the surfaces of the hard resins 9 and 10 by a fluid printing method. Leather 13 is adhered to the surface of the soft resin 11 and its terminal 13a
Are pressed into the grooves 14 of the hard resins 9 and 10 by a spatula (not shown) via an adhesive. Finally, a pad is attached to the base 7 to form the boss 3 and the steering wheel 1 is completed.

In this embodiment, since the bent portion K of the leather 13 is bent at a substantially right angle at a small bending degree (the bending degree corresponding to an arc having a radius of 0.6 to 1.5 mm), the bent portion K of the leather 14 is formed. There is no gap between the groove and the edge E2 of the groove 14 (see FIG. 5). That is, if the bent portion K is bent at a large bending degree, a gap may be formed between the bent portion K and the edge E2, but this is not the case in this embodiment. Therefore, the appearance is good and the driver's claws are not caught.

Further, since the terminal 13a of the leather 13 extends to the hard resin 9 and 10 and is fixed, even if the vicinity of the terminal 13a of the leather 13 is pushed, the terminal 13a does not turn up. The terminal 13a of the leather 13 is a hard resin 9,
10, it is firmly fixed. Also,
The joint between the soft resin 11 and the hard resins 9 and 10 is made of leather 13
Can be concealed, and the appearance does not deteriorate.
In particular, in this embodiment, since the terminal 13a of the leather 13 is bent and pushed into the groove 14 of the hard resin 9, 10, the terminal 13a of the leather 13 is completely prevented from being turned over,
The idling of the leather 13 is also prevented.

FIG. 7 is a diagram showing a second embodiment of the present invention. In this embodiment, no groove is formed in the hard resin 19, and the terminal 20a of the leather 20 is adhered while being straight. In this manner, the terminal 20a may be adhered while being straight. The other configuration and operation and effect are the same as those in the first embodiment, and a duplicate description will be omitted.

In each of the above embodiments, the example in which the leathers 13 and 20 are provided as the "cover member" has been described, but the present invention is not limited to this.

[0035]

According to the first aspect of the present invention, since the end of the cover member extends to the hard resin side and is fixed,
Even if the cover member is pressed near the terminal, the terminal does not turn up. Further, since the terminal of the cover member is fixed to the hard resin, the terminal is firmly fixed. In addition, the joint between the soft resin and the hard resin can be covered and covered with a cover member,
The appearance does not deteriorate.

According to the second aspect of the present invention, since the terminal fixing means of the cover member is an adhesive, the cover member is reliably prevented from idling.

According to the third aspect of the present invention, since the terminal of the cover member is bent and pushed into the groove of the hard resin, the terminal of the cover member is completely prevented from being turned up, and the cover member is also prevented from spinning. Is prevented.

According to the fourth aspect of the present invention, since the groove is formed obliquely with respect to the circumferential direction, idling of the cover member is more reliably prevented.

According to the fifth aspect of the present invention, since the degree of bending of the end of the cover member is small (0.6 to 1.5 mmR) and bent at substantially a right angle, the end of the cover member and the edge of the groove are not bent. There is no gap between them. Therefore, there is no possibility that the driver's nail may be caught.

According to the sixth aspect of the present invention, since the extension formed at the end of the hard resin has a convex portion or a concave portion which engages with the soft resin, the connection between the hard resin and the soft resin is reduced. Be certain. Further, since the extension is hidden by the soft resin, there is no problem in appearance.

According to the seventh aspect of the present invention, since the decorative material is provided on the surface of the hard resin, the appearance of the hard resin is good.

[Brief description of the drawings]

FIG. 1 is a plan view of a steering wheel according to a first embodiment of the present invention.

FIG. 2 is a plan view of the steering wheel showing a state where a hard resin is formed on a cored bar.

FIG. 3 is a plan view of the steering wheel showing a state where a hard resin and a soft resin are formed on a cored bar.

FIG. 4 is a sectional view taken along the line SA-SA shown in FIG.

FIG. 5 is an enlarged sectional view showing a terminal portion of the leather in FIG. 4;

FIG. 6 is a cross-sectional view showing a mold for forming a soft resin.

FIG. 7 is a sectional view corresponding to FIG. 4, showing a steering wheel according to a second embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 2 rim part 3 boss part 4 spoke part 5, 6 core metal 8 gripping part 9, 10, 19 hard resin 11 soft resin 12 decorative material 13, 20 leather (cover member) 13a, 20a terminal 14 groove 15 extension 16 protrusion Department

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Sadayuki Kawakami 218 Aoshima-cho, Fuji-shi, Shizuoka Japan Nippon Plastics Co., Ltd.

Claims (7)

[Claims] 1. A combination type in which a core metal other than left and right grip portions in a rim portion is covered with a hard resin, each grip metal of a grip portion and a spoke portion is coated with a soft resin, and a cover member is provided on a surface of the soft resin. The steering wheel according to claim 1, wherein a terminal of the cover member extends to a hard resin side and is fixed to the hard resin. 2. The steering wheel according to claim 1, wherein the fixing means of the terminal of the cover member is an adhesive. 3. The steering wheel according to claim 1, wherein a peripheral groove is formed at an end of the hard resin, and a terminal of the cover member is bent and pushed into the groove. A special feature of the steering wheel. 4. The steering wheel according to claim 3, wherein the groove is formed obliquely with respect to a circumferential direction. 5. The steering wheel according to claim 3, wherein a bending degree of a terminal of the cover member is 0.6 to 1.5 mmR. 6. The steering wheel according to claim 1, wherein an extension portion is formed at an end of the hard resin to enter a lower side of the soft resin, and the extension portion is formed of a soft resin. A steering wheel, wherein a convex portion or a concave portion engaging with the steering wheel is formed. 7. The steering wheel according to claim 1, wherein a decorative material is provided on a surface of the hard resin.