JPH07102814B2 - Leather-wrapped steering wheel and manufacturing method thereof - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leather-wrapping method for a steering wheel and a leather-wrapped steering wheel manufactured by the method.

[Prior art]

A conventional leather-wrapped steering wheel is generally one in which a ring-shaped covering material is punched out from one piece of leather material and attached to the ring by hand sewing.

[Problems to be Solved by the Invention]

The above-mentioned hand-sewn one requires a processing time of 1 hour or more per piece and is low in efficiency, and the skin of the stitched portion is raised and does not have a good feel to the touch, so that the material is punched out from a single piece of leather material. There were problems such as a very poor yield. The present invention has been made for the purpose of solving these problems by paying attention to the above problems.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, in the manufacturing method of the present invention, a tape-shaped first skin material for respectively covering the outside and the inside of the ring of the steering wheel and the front side and the back side of the ring are respectively covered. A second skin material having a predetermined shape for preparing, by roller-bonding the first skin material on the outside and the inside of the ring, and press-bonding the second skin material on the front and back sides of the ring. I am trying to wrap it. In the steering wheel obtained by the above method, a tape-shaped first skin material is adhered to the outside and the inside of the ring, respectively, and a second skin material having a predetermined shape is adhered to the front side and the back side of the ring. It has been processed without any processing. In this processing, the portions where the leather materials are joined together are provided with inclined cutout portions at their respective edges so that the cutout portions overlap each other. Depending on the shape of the steering wheel, some of the spokes may be wrapped in leather, and in this specification,
The terms inside and outside of the ring are used to include the parts of the spokes that are wrapped in leather.

[Action]

According to the present invention, since there is no hand-sewn portion and all the processing can be performed by adhesion, the processing process is made efficient, and a smooth and comfortable finish can be obtained. Further, the first leather material is in the form of a tape, and the second leather material may also be formed by joining a plurality of small pieces, so that the material yield is improved. In particular, if the cut parts that are inclined are received at the part where the leather materials are joined and the cut parts are overlapped, the swelling of the joined parts is eliminated and the smoothness of the surface is improved, and a product with a better feel is obtained. .

【Example】

Next, the illustrated embodiment will be described. FIG. 1 shows the roller bonding process of the first leather material, FIG. 2 shows the press bonding process of the second leather material, and both processes are completed in FIGS. 3 (a) and 3 (b). FIGS. 4 to 6 are views showing the steering hole, and FIGS. 4 to 6 are views showing the shape of each leather material. 1 in FIG. 1 is the first leather material obtained by rolling a tape-like leather material, 11 in FIG. 4 is a material piece adhered to the outside of the ring,
Reference numerals 12 and 13 are pieces of material to be bonded to the inside of the ring. In this embodiment, each piece of material is obtained by roller-bonding the leather material 1 to the steering wheel and then cutting the material. It may be cut off. In addition, since FIG. 4 shows the case of the two-spoke type, there are two kinds of material pieces 12 and 13 adhered to the inside, which depends on the number of the spokes. Reference numeral 2 in FIGS. 5 (a) and 5 (b) is a second leather material that is adhered to the front side and the back side of the ring, and includes a material piece 21 having a spoke protrusion 21a and an arc-shaped material piece 22. Are combined and bonded at the joint 3 to form a shape corresponding to the steering wheel. FIG. 5 (a) shows the case of the two-spoke type, but in the case of the three-spoke type, as shown in FIG. 5 (b), for example, the material piece 21 and the protrusions 23 for the spokes.
It is composed of a combination of material pieces 23 provided with a. As described above, the second leather material 2 has a shape corresponding to the number of spokes, and can be punched from one leather material, but can be configured by joining a plurality of material pieces. The leather wrapping process is performed by roller adhesion of the first leather material 1 and press adhesion of the second leather material 2. First, as shown in FIG. 1, while the steering wheel 4 is being rotated, the adhesive is applied to the outside of the ring by the adhesive applicator 5, and the rolled first leather material 1 is sequentially fed out to form the hourglass roller 6
Then, the skin material 1 is adhered to the inside of the ring and cut by adhering to it while applying pressure while pressing. Then the second
As shown in the figure, the second skin material 2 is set in the concave groove 7a of the mold 7 formed corresponding to the shape of the steering wheel 4, and the adhesive is applied on the second skin material 2 to form the steering wheel 4
Are aligned and placed, and the process of pressing with a press is performed on both the front side and the back side. The leather material 2 may be adhered to the front and back simultaneously by a method in which the steering wheel 4 is erected and pressed from both sides, or the upper leather material 2 is vacuum-sucked and simultaneously pressed up and down. Here, as shown in FIG. 6, the portions where the respective skin materials are joined are provided with inclined cutout portions 8 at their edges, and the cutout portions 8 are made to overlap each other.
FIG. 3 (b) shows the T-shaped portion 4a at the tip of the spoke, 4b is a core metal, 4c is a urethane foam, and the skin materials 1 and 2 are adhered thereon. And the overlapping part 9
The inclined cutting portion 8 makes the surface thereof have the same height as that of the other portions, so that a surface having no unevenness is formed. The joint portion 3 of the material piece of the leather material 2 is also joined by providing an inclined cutout portion similarly to this. The skin materials 1 and 2 may be adhered in the reverse order of the above procedure, but the skin material 1 is adhered first so that the overlapping portions 9 are located at the inconspicuous positions on the outside and the inside of the ring. It is easy to obtain a good product.

【The invention's effect】

As is apparent from the above-described embodiments, according to the present invention, the tape-shaped first leather material is roller-bonded to the outer side and the inner side of the ring, and the second leather material having a predetermined shape is press-bonded to the front and back sides of the ring. Then, a steering wheel that has been leather-wrapped is obtained. Therefore, it is possible to improve the production efficiency by automating the process, and by pressing the plate-shaped leather material to the three-dimensional ring portion by the pressing process, eliminating the rise of the leather such as the stitched portion in the case of hand-sewn. It is possible to obtain a steering wheel with a good feel. Particularly, in the case where an inclined cutout portion is provided at the portion where the leather materials are joined and the cutout portions are overlapped with each other, the smoothness of the joined portion is improved, and it is easy to obtain a product with a good feel. Furthermore, since it is not necessary to punch from one piece of leather material, the yield can be improved and the material cost can be saved. The first leather material that mainly covers the outer and inner circumferences of the ring is a tape shape with a width of 10 to 20 mm. Since it can be used in common regardless of the design of the steering wheel and the number of spokes, the cost can be reduced also in this respect.

[Brief description of drawings]

FIG. 1 is a diagram showing a procedure for roller bonding of a first leather material according to an embodiment of the present invention, FIG. 2 is a diagram showing a procedure for press bonding of a second leather material, FIG. 3 (a), (B) is a front view of the steering wheel after the skin material is adhered and a cutaway perspective view of a main part, FIG. 4 is a perspective view of the first skin material, FIG. 5 (a),
FIG. 6B is a perspective view of the second leather material, and FIG. 6 is a perspective view of a main part of the leather material. 1 ... First skin material, 2 ... Second skin material, 3 ... Joining portion, 4 ... Steering wheel, 4a ... T-shaped portion, 4b ...
… Core bar, 4c …… Urethane foam, 5 …… Adhesive applicator, 6 …… Hourglass roller, 7 …… Type, 7a …… Recessed groove, 8 ……
Cut-off part, 9 …… Overlap part, 11,12,13 …… Material piece, 21,22,
23 …… Material piece, 21a, 23a …… Projection.

Claims (2)

[Claims] 1. A tape-shaped first leather material (1) for covering the outer side and the inner side of a ring of a steering wheel (4), and a predetermined shape for covering the front side and the back side of the ring, respectively. Prepare the second leather material (2),
The first skin material (1) is roller-bonded to the outer side and the inner side of the ring, and the second skin material (2) is press-bonded to the front side and the back side of the ring to perform the skin winding process. Method for manufacturing a leather-wrapped steering wheel. 2. A tape-shaped first skin material (1) is adhered to the outside and the inside of the ring, respectively, and a second skin material (2) having a predetermined shape is adhered to the front side and the back side of the ring. In addition to performing the winding process, the portions where the leather materials (1) and (2) are joined are provided with inclined cutouts (8) at each end edge, and the cutouts (8) are overlapped with each other. A leather-wrapped threading wheel featuring.