JP5364556B2 - tire - Google Patents

Description

  The present invention relates to a tire provided with a decorative portion on a tire side portion.

2. Description of the Related Art Conventionally, a side decoration band formed by arranging a plurality of straight or curved ridges in parallel on a side portion of a tire has been widely used.
For example, Patent Document 1 discloses an example in which a second ridge is formed in a first ridge to form a side decoration band. Patent Document 2 discloses an example in which a side decorative band having a first decorative element composed of only a first ridge and a second decorative element in which a second ridge is arranged in the first ridge is formed. Is disclosed.

US Pat. No. 5,807,446 JP 2008-273505 A

However, in Patent Document 1, although the effect of making the unevenness of the side portion of the tire inconspicuous is obtained, the change of the silhouette due to how the light hits is scarce, and the impact on the viewer is weak. In Patent Document 2, the effect of improving the appearance by changing the reflection state of light by combining two kinds of decorative elements can be obtained, but the change in the intensity of light and darkness due to the change in the ridge height is poor.
In view of the above facts, an object of the present invention is to provide a tire that makes the unevenness of the side portion inconspicuous and further improves the appearance of the side portion.

Invention of Claim 1 has a decoration part in a tire side part, The said decoration part has several decoration elements, The said decoration element is provided with the 1st ridge which forms a decoration element outline , a decorative element a enclosed within a region in the first ridge has a smooth surface, prior SL and decorative element B having a second ridge which is located within the first ridge, the second as compared with the decorative element B seen containing an arrangement and the second decorative element extending directions are different from the ridge C ridge, the combination of said decorative element a, the decoration element B, and said decorative element C, the tire circumferential direction and the tire radial Periodically formed in the direction .

  In the first aspect of the present invention, when the decorative elements A to C are adjacent to each other, even if the decorative elements share a part of the first ridge, a plurality of decorative elements A to C are combined. Will be.

  In the first aspect of the present invention, the tire side portion is provided with a decorative portion formed by combining a plurality of such decorative elements A to C, so that the unevenness of the tire portion provided with the decorative portion is inconspicuous. Can be made. And since the arrangement of the second ridge is different between the decorative element B and the decorative element C, it is possible to effectively produce the difference in shadow due to the difference in the way of reflecting light (sunlight, ambient light, etc.). In addition, the tire can be a tire in which the appearance (designability) of the tire side portion is remarkably improved.

According to one aspect of the present invention, in the decorative element A, a region within the first ridge is smooth surface.
Thereby, in the area | region in the 1st ridge which comprises the decoration element A, the reflectance of light is high and the reflection angle of light is uniform, and the silhouette is visually recognized effectively in the decoration element B and the decoration element C.

In the first aspect of the present invention, the extending direction of the second ridge is different between the decorative element B and the decorative element C.
Thereby, the difference of the brightness (shading of the shadow) by the difference in the reflection direction of light can be effectively produced by the decoration element B and the decoration element C.

In the invention according to claim 2 , the pitch of the second ridge is different between the decorative element B and the decorative element C.
Thereby, the difference in shadow by the difference in pitch between the decorative element B and the decorative element C can be effectively produced. This is particularly effective in sufficiently viewing the brightness difference between the decorative element B and the decorative element C when the amount of light incident on the tire side portion is small.

Invention of Claim 3 is provided with the mark part which displays a mark on the said tire side surface, and the said decoration element A and the said decoration element B are arrange | positioned in at least one part of the circumference | surroundings of the said mark part. Yes.
Thereby, the visibility of a mark part improves, ie, the visibility of a mark improves.

According to a fourth aspect of the present invention, ridges are arranged in a peripheral area excluding the mark in the mark portion, and the mark is displayed on a smooth surface.
Thereby, the visibility of the mark is further improved and the impact on the person who has seen the mark is great. It is preferable that two or more decorative portions are formed and the decorative portions are arranged on both sides in the tire circumferential direction of the mark portion from the viewpoint of making the mark having a high degree of visibility more conspicuous.

  ADVANTAGE OF THE INVENTION According to this invention, while making the unevenness | corrugation of a side part inconspicuous, it can be set as the tire which further improved the external appearance property of the side part.

1 is a side view of a pneumatic tire according to a first embodiment. 2A and 2B are a partially enlarged side view of FIG. 1 and an enlarged view of a main part of FIG. 2A, respectively. It is explanatory drawing of the concept of arrange | positioning a 1st decoration element and a 2nd decoration element in 1st Embodiment. It is sectional drawing seen from the arrow 4-4 of FIG. 2 (B). It is sectional drawing seen from the arrow 5-5 of FIG. 2 (B). It is a partial expanded side view of the side decoration belt of the pneumatic tire concerning a 2nd embodiment.

  Hereinafter, embodiments will be described and embodiments of the present invention will be described. In the second and subsequent embodiments, the same components as those already described are denoted by the same reference numerals, and description thereof is omitted.

[First Embodiment]
First, the first embodiment will be described. FIG. 1 is a side view of a pneumatic tire 10 according to the present embodiment. As shown in FIGS. 1 and 2, the side portion 14 of the pneumatic tire 10 has an arcuate side decoration band 16 (FIG. 1) formed by combining 0, a plurality of decoration elements A1, decoration elements B1, and decoration elements C1. , See FIG. 2). Two side decorative strips 16 are formed so as to be arranged at symmetrical positions with the tire center axis CE (see FIG. 1) in between.

  An arc-shaped mark portion 30 is formed on the side portion 14 so as to be adjacent to one side decorative strip 16 and the other side decorative strip 16 at both ends. Accordingly, the two mark portions 30 are also formed so as to be arranged symmetrically with respect to the tire central axis CE. The mark 32 is displayed with characters “ABCDEFGH” displayed on a smooth surface, for example. A large number of ridges 34 are arranged in the surrounding area 36 excluding the mark 32 in the mark portion 30.

As shown in FIG. 2, in the side decorative strip 16, a plurality of decorative elements A1, decorative elements B1, and decorative elements C1 are periodically combined. Two side decorative strips 16 are formed so as to be arranged symmetrically with respect to the tire central axis.
The decorative element A1 is formed only by the first ridge 46 that forms the outline of the rhombic smooth surface region 44 whose longitudinal direction is the tire circumferential direction U. In addition, as the reflected light in the smooth surface region 44, the reflected light when the light is incident from the normal direction of the smooth surface region 44 is most brightly visible.

  The decorative element B1 includes a first ridge 46 that forms an outline of a parallelogram-shaped region that rises to the left in the drawing, and a second ridge 49 that is arranged in the first ridge 46 so as to extend in the upper left direction on the drawing. The Note that, as the reflected light on the surface of the second ridge 49, the reflected light when the light is incident from the normal direction of the surface is most brightly visible.

The decorative element C1 includes a first ridge 46 that forms an outline of a parallelogram-shaped region that rises to the right in the drawing, and a second ridge 49 that is arranged in the first ridge 46 so as to extend in the upper right direction on the drawing. ing. In the present embodiment, the extending direction of the second ridge 49 differs by 90 ° between the decorative element B1 and the decorative element C1.
The decorative elements A1 to C1 have a structure in which overlapping portions are shared with each other. In the present embodiment, the height of the second ridge 49 is lower than that of the first ridge 46.

  The decorative elements A1 are arranged side by side in the tire circumferential direction U. The decorative element B1 and the decorative element C1 are alternately arranged in the tire circumferential direction U. The first decorative element row 54 in which the decorative elements A1 are arranged in the tire circumferential direction U and the second decorative element row 56 in which the decorative elements B1 and C1 are arranged in the tire circumferential direction U are the tire radial direction. R are alternately arranged. Further, the first decorative element rows 54 sandwiching the second decorative element row 56 from both sides in the tire radial direction are arranged so as to be displaced from each other in the tire circumferential direction U by half of the tire circumferential direction length of the decorative element A1. The second decorative element rows 56 sandwiching the first decorative element row 54 from both sides in the tire radial direction are arranged so as to be shifted from each other in the tire circumferential direction U by the tire circumferential direction length of the decorative element B1 or the decorative element C1. Yes.

  The concept of arranging the decorative element A1, the decorative element B1, and the decorative element C1 in this way will be described with reference to FIG. As shown in FIG. 3, in this embodiment, the decoration elements A1 to C1 are three rhombuses having the same shape, each of which constitutes a regular hexagon. Therefore, the decorative elements A1 to C1 have a rhombus shape with a wide angle of 120 ° and an included angle of 60 °.

In addition, the decorative element A1 has the second ridge 49 so that the smooth surface region 44 is formed in the first ridge 46, and the second ridge 49 is arranged in the decorative element B1. The first ridge 46 and the second ridge are arranged so that the extending direction of the second ridge 49 of the decorative element C1 is different from that of the second ridge 49 of the decorative element B1 by 90 °. 49 and the arrangement position of the smooth surface region 44 are set in advance, and the first ridge 46, the second ridge 49, and the smooth surface region 44 are combined.
With such a configuration, the decorative element A1, the decorative element B1, and the decorative element C1 are periodically arranged on the side decorative band 16.

  As described above, the side decorative band 16 is formed on the side portion 14 in the present embodiment. In the side decorative band 16, decorative elements A1, decorative elements B1, and decorative elements C1 are periodically arranged in the tire circumferential direction U and the tire radial direction R. The first ridge 46 of the decorative element A1 is a smooth surface region 44, the second ridge 49 is arranged in the first ridge 46 of the decorative element B1, and the second ridge 49 of the decorative element B1 is arranged in the decorative element C1. A second ridge 49 having an angle of 90 ° with the ridge 49 is arranged. Therefore, three different gradations (gradations) are visually recognized on the side decoration band 16. Thereby, the decoration elements A to C can effectively produce a difference in lightness (shadow density) due to a difference in the light reflection direction. And in the smooth surface area | region 44, a reflectance is high and the reflection direction is the same direction. Therefore, it is possible to obtain the pneumatic tire 10 with clear and light gloss, high-quality feeling, and improved appearance (design). This is particularly noticeable when the side decorative strip 16 is coated with wax.

  The height of the first ridge 46 is higher than that of the second ridge 49. Accordingly, the first ridge 46 serves as an outer frame of the decorative pattern, and the second ridge 49 serves to improve visibility, so that the appearance is further improved. It should be noted that the ridge dimensions can be varied in this manner by varying the processing depth when forming the ridge by cutting or etching.

Further, in the side decorative band 16, the decorative element A1, the decorative element B1, and the decorative element C1 are periodically and continuously formed, so that the unevenness of the portion where the side decorative band 16 is formed is conspicuous. Can be eliminated.
The first ridges 46 forming the outer edges of the decorative elements A1 to C1 have the same shape and the same ridge height. Thereby, the uniformity and regularity appear remarkably in the side decoration band 16, and a further effect is obtained in making the unevenness of the side decoration band 16 inconspicuous. In addition, in a situation where the incident angle of light changes in a short time (especially a situation where the tire rotates), the reflected light from the decorative element A1, the decorative element B1, and the decorative element C1 is continuously viewed at regular intervals. In addition, the uniformity and regularity of the side decorations are strongly visible.

  Further, the extending direction of the second ridge 49 differs by 90 ° between the decorative element B1 and the decorative element C1. Therefore, when the pneumatic tire 10 is rotated at a rotation speed at which the decorative elements A1 to C1 can be visually recognized, the shade of the shade changes regularly, so that the appearance (design) of the side portion 14 is further improved.

  Moreover, in this embodiment, the pneumatic tire 10 is provided with the mark part in the side part 14, and this mark part 30 displays the mark 32, and is connected to the decoration element A1 and the decoration element B1 at both ends. Each is adjacent. Therefore, the visibility of the mark part 30 is improved, that is, the visibility of the mark 32 is improved.

  Further, the mark 32 is displayed on a smooth surface, and a ridge 34 (for example, a straight or curved ridge) is arranged in the surrounding area 36 excluding the mark 32 in the mark portion 30. Thereby, the visibility of the mark 32 is further improved, and the impact on the person who has seen the mark 32 is great. And since the two side decoration bands 16 are formed and this side decoration band 16 is arrange | positioned at the tire circumferential direction both sides of the mark part 30, the mark 32 with high importance of visibility can be made more conspicuous. it can.

  Hereinafter, preferred specific examples of the first ridge 46, the second ridge 49, and the arrangement interval thereof will be described.

  4 is a cross-sectional view as seen from the direction 4-4 in FIG. As shown in FIG. 4, the first ridge 46 constituting the decorative element B1 has a trapezoidal cross section. The width B1 of the flat surface 46F that forms the top of the first ridge 46 is 0.2 mm at the maximum. The angle α1 formed by the slope (side wall) 46S of the first ridge 46 with respect to the normal direction N of the side decorative strip 16 is 45 °. The height h1 of the first ridge 46 is 0.2 mm (h1 is preferably in the range of 0.15 to 0.35 mm). Moreover, the height of the partition ridge 38 (refer FIG. 1) extended in the tire radial direction R and partitioning the side decoration band 16 and the mark part 30 is 0.4 mm.

  The second ridge 49 is also trapezoidal in cross section. The width B2 of the plane 49F that forms the top of the second ridge 49 is also 0.2 mm at the maximum. The angle α2 formed by the slope 49S of the second ridge 49 with respect to the normal direction N of the side decorative strip 16 is 35 °. The height h2 of the second ridge 49 is 0.15 mm (note that h2 is preferably in the range of 0.1 to 0.3 mm). The interval d2 between the adjacent second ridges 49 is 0.6 mm.

  FIG. 5 is a cross-sectional view taken along the line 5-5 in FIG. As shown in FIG. 5, the cross-sectional dimensions of the first ridge 46 and the second ridge 49 constituting the decorative element C1 are the same as those of the first ridge 46 and the second ridge 49 constituting the decorative element B1, respectively. However, the distance d3 between the adjacent second ridges 49 is 0.8 mm.

  As described above, the slopes 46S of the first ridge 46 and the slopes 48S of the second ridge 48 are different in angle (α1 and α2 are different), so that the first ridge 46 serves as an outer frame of the decorative pattern. The second ridge 49 can further clearly play the role of improving the visibility of the pattern. This is further manifested by the relationship of h1> h2 and α1> α2.

  Further, the pitch of the second ridges 49 arranged in the decorative element C1 (the adjacent second ridges 49) is larger than the pitch of the second ridges 49 arranged in the decorative element B1 (the distance d2 between the adjacent second ridges 49). The distance d3) between them is wider. Accordingly, the second ridges 49 are arranged at a higher density in the decorative element B1 than in the decorative element C1. Accordingly, it is possible to effectively produce a difference in shadow caused by a difference in pitch between the decorative element B1 and the decorative element C1. This is particularly effective in sufficiently visualizing the brightness difference between the decorative element B1 and the decorative element C1 when the amount of light incident on the tire side surface is small.

  In addition, if these dimensions are within a range of ± 50% of the values exemplified here, and preferably within a range of ± 30%, sufficient effects can be obtained in terms of visibility and durability.

[Second Embodiment]
Next, a second embodiment will be described. As shown in FIG. 6, a side decorative band 66 in which a decorative element C <b> 2 is arranged instead of the decorative element C <b> 1 (see FIG. 2) is provided in the side portion of the pneumatic tire according to the present embodiment as compared with the first embodiment. Is formed.
In the decorative element C2, the extending direction of the second ridge 49 is the same as that of the second ridge 49 of the decorative element B1 compared to the decorative element C1 described in the first embodiment.
Also according to this embodiment, three different gradations (gradations) are visually recognized on the side decoration band 66, and the same effect as that of the first embodiment can be obtained.

10 Pneumatic tire (tire)
14 Side part (tire side part)
16 Side decoration band (decoration part)
30 Mark part 32 Mark 34 Ridge 36 Surrounding area 44 Smooth surface area (area)
46 1st ridge 49 2nd ridge 66 Side decoration band (decoration part)
A1 decoration element (decoration element A)
B1 decoration element (decoration element B)
C1 decoration element (decoration element C)
C2 decoration element (decoration element C)

Claims (4)

Has a decorative part on the tire side,
The decorative portion has a plurality of decorative elements,
The decorative element comprises a first ridge forming a decorative element outline, the decoration element A is enclosed within a region in the first ridge is smooth plane, a second ridge positioned before Symbol the first ridge seen containing a decorative element B having a said a decorative element B decorative elements extending direction of arrangement and the second ridge of the second ridge compared different C, and combinations,
A tire in which the decorative element A, the decorative element B, and the decorative element C are periodically formed in a tire circumferential direction and a tire radial direction . The tire according to claim 1, wherein the decorative element B and the decorative element C have different pitches of the ridges. Provided with a mark part for displaying a mark on the side of the tire,
The tire according to claim 1 or 2, wherein the decorative element A and the decorative element B are arranged at least at a part around the mark portion. Ridge is arranged in the surrounding area excluding the mark in the mark part,
The tire according to claim 3, wherein the mark is displayed on a smooth surface.

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