JPH11254552A - Production of steering wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a method for producing a steering wheel having a grain pattern on the surface which enables the curtailment of processing time, mass production, and price reduction. SOLUTION: The production a steering wheel comprises a process in which a grip core material 2 having a peripheral ring adhesion part for covering a peripheral ring is shaped up, a process in which an adhesive is applied to the clearance between the grip core material 2 and a sliced plate 1 cut in advance, a process in which the sliced plate 1 covering the grip core material 2 is vacuum-pressed with heating through a soft rubber sheet 5, a process in which the adhesion surfaces of an upper side grip and a lower side grip are cut, a process in which an adhesive is applied on the adhesion surfaces of the upper side grip and the lower side grip and on the peripheral ring adhesion part, a process in which the upper half and lower half of the peripheral ring are covered with the upper side grip and the lower side grip and contact-bonded, and the step of the Joint outer surface is trimmed and sanded, and a process in which the outer surface of the grip is colored and clear-coated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method in which a wooden surface material and a plywood or resin core material are integrally formed, and the resulting material is covered on a steel core material of a steering wheel to cut a log. The present invention relates to a method for manufacturing a steering wheel capable of obtaining a high-class feeling and a luxury feeling.

[0002]

2. Description of the Related Art In a method of manufacturing a steering wheel capable of obtaining a feeling of shaving a raw wood, a veneer surface material having a grain is preformed to form a shell-like skin, which is made of wood, resin, or the like. Or by manually inserting the outer skin into a mold. However, these processing methods have the disadvantage that manual labor requires a lot of man-hours, and there is no compromise between productivity and price.
OEM supply was not possible. Although it is theoretically possible to use insert molding, commercialization is not easy in practice.

[0003]

SUMMARY OF THE INVENTION In view of the problems of the prior art, there is provided a method for manufacturing a steering wheel having a grain on its surface, which enables a reduction in processing time, mass production and a reduction in price. As an issue.

[0004]

According to the following steps (1) to (7), a steering wheel having a grain can be manufactured. (1) a step of shaping the grip core material 2 having the outer peripheral ring bonding portion 8 for covering the outer peripheral ring 7;
(2) Grip core 2 and precut veneer 1
(3) grip core material 2
Heating the veneer 1 covered with the soft rubber 5 and pressing it by vacuum suction; (4) upper grip G
A step of cutting _one and adhesive surface of the lower grip G _2, and applying an adhesive (5) upper grip G ₁ and a lower adhesive surface and an outer ring bonding portion 8 of the grip G _2, (6) a step of covering the upper and lower halves of the outer ring 7 by the upper grip G ₁ and lower grip G _2, pressurized bonded, trimming and sanding process the step of bonding outer surface, (7) outside of the grip The process of coloring and clear coating the surface.

[0005]

An embodiment of the present invention will be described with reference to the drawings. As shown in FIG.
A veneer plate 1 of about 0.6 mm is prepared. The veneer plate 1 has a grain pattern and is cut in advance into a predetermined shape, for example, an arc-shaped strip. The radial width w of the arc-shaped strip is larger than a half circumference of the cross section of the outer peripheral ring 7 of the steering wheel shown in FIG. Then, an adhesive (not shown) is applied to the back surface of the strip. The adhesive may be applied between the grip core 2 and the veneer 1, which will be described later, and may be applied to the surface of the grip core 2.

FIG. 3 shows the shape of the rim of the steering wheel with the gripping core 2, which is formed of wood or resin.
The grip core 2 and the veneer 1 having a grain attached to the surface of the grip core 2 are bonded by a vacuum pressure bonding apparatus shown in FIG. In FIG.
Reference numeral 3 denotes an upper die, and 4 denotes a lower die. A veneer 1 is placed on a grip core 2 made of wood or resin via a soft rubber 5 therebetween, and a vacuum (vacuum) is applied. Veneer plate 1 with grip core material 2 and adhesive applied to the back surface in advance
And glue. In a completely bonded state, the longitudinal end of the pushing plate 1 is attached to the longitudinal end of the grip core 2 by the reference numeral 1.
As shown in FIG. 1A (FIG. 1B), it has a bent portion.

In a state in which the veneer plate 1 is bonded to the grip core material 2 by the method shown in FIG. 1, both the veneer plate 1 and the grip core material 2 are oversized as shown by the dotted line in FIG. ing. Therefore, the abutting plate 1 and the grip core 2 are connected, for example, with N
The adhesive surface 6 is cut off by a C milling machine. Reference numeral 7 denotes an outer peripheral ring serving as a core metal, preferably a hollow steel pipe ring, but may be formed by die casting using a metal such as aluminum or magnesium. The outer peripheral ring 7 includes a grip core member 2 covering the lower side manufactured in the same manner as the above-described upper grip G ₁ and a pushing plate 1.
Covered by preparative and lower grip G ₂ adhered to. Reference numeral 8 denotes an outer peripheral ring bonding portion to which the outer peripheral ring 7 fits.

[0008] Figure 5 shows step prior to bonding the upper grip G ₁ and the lower grip G ₂ which has been processed by the cutting process shown in FIG. 4 the peripheral ring 7, the upper grip G ₁ and the lower grip G ₂ A state in which a foaming or expansion reaction type adhesive is applied to the bonding surface 6 and the outer peripheral ring bonding portion 8 is shown.

[0009] In a state in which an adhesive is applied to the upper grip G ₁ and the lower grip G ₂ as shown in FIG. 5, as shown in FIG. 6, covers the lower half and upper half of the outer ring 7, pressurized adhesive I do. About this adhesion, it is desirable to apply sufficient pressure over a number of days and to dry. In this case although the step d is exerted on the junction of the upper grip G ₁ and the lower grip G ₂ (see FIG. 7), the level difference d trims and sanding process, is connected in a state of eliminating a step.

Next, after performing trimming and sanding treatments as shown in FIG. 8, coloring and clear coating are performed on the outer surface to form a coating layer 10. In addition, it is preferable to use polyester or polyurethane paint for clear coating.

FIG. 9 shows a steering wheel manufactured by the method according to the present invention. The wheel having a wood grain pattern formed by a veneer 1 is completed. Although the entire outer peripheral ring may have a plate-like pattern, FIG. 9 shows a product processed at about 175 ° with four spokes.

[0012]

According to the manufacturing method according to the present invention, veneer 1 and the build grip core 2 and the upper grip G ₁ is adhered to the lower grip G _2, upper and lower outer peripheral ring 7 in those Since it is only necessary to cover and adhere to the steering wheel, it is possible to extremely easily manufacture a steering wheel having a high-grade appearance. Since it can be easily performed, the processing time can be reduced, and the cost can be reduced by mass production.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a bonding step between a grip core material and a veneer plate.

FIG. 2 is a perspective view of a veneer plate.

FIG. 3 is a perspective view showing a state in which a grip core member and a veneer plate are bonded.

FIG. 4 is an explanatory view showing a bonding surface cutting step after bonding the grip core material and the veneer plate.

FIG. 5 is an explanatory view showing a step of applying an adhesive to a grip core material for bonding to an outer peripheral ring.

FIG. 6 is an explanatory view showing a step of bonding an upper grip and a lower grip to an outer peripheral ring.

FIG. 7 is an explanatory view showing a step of trimming and sanding a step on the outer surface of the joint between the upper and lower grips.

FIG. 8 is an explanatory view showing a step of coloring and clear-painting the outer surface of the grip.

FIG. 9 is a perspective view of a finished product of the steering wheel.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Veneer plate 2 Grip core material 3 Upper mold 4 Lower mold 5 Soft rubber 6 Adhesive surface 7 Outer ring 8 Outer ring adhesive part 9 Adhesive 10 Painting layer G ₁ Upper grip G ₂ Lower grip

Claims (1)

[Claims] 1. A method of manufacturing a steering wheel comprising the following steps (1) to (7). (1) Peripheral ring adhesive to cover the peripheral ring (7)
And (2) applying an adhesive between the grip core (2) and the precut veneer (1). Process and
Lower (5) a step of bonding by heating matterゝvacuum suction through a (4) upper grip (G ₁₎ - (3) veneer covering on the grip core (2) to (1) Sofutoraba Side grip
(5) a step of cutting the adhesive surface of (G ₂ ), and (5) a step of applying an adhesive to the adhesive surface of the upper grip (G ₁ ) and the lower grip (G ₂ ) and the outer peripheral ring adhesive portion (8); (6) The upper and lower halves of the outer peripheral ring (7) are covered with the upper grip (G ₁ ) and the lower grip (G ₂ ), adhered by pressing, and the step on the outer surface of the joint is trimmed and sanded. And (7) a step of coloring and clear coating the outer surface of the grip.