JPH09226328A - Pneumatic tire having mark formed by many ridges - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the visibility of a mark by making the ridge interval measured in the circumferential direction substantially equal between a first area and a second area, and differentiating the ridge intervals measured in the direction right-angled to the ridge extending direction. SOLUTION: Various trade marks and marks such as a trade dress or the like are provided on the surface of a side wall of a tire. Small ridges 20.4mm high are disposed at equal intervals of small space 1mm long in the circumferential direction on the surface of a character 1 for forming the mark (D). First areas A, C on the surface of the character 1, the ridge 1 is extended linearly in the direction of being inclined at a fixed angle of 70 to the circumferential direction of the tire. In a second area B of the surface of the character 1, the ridge 1 is extended linearly and like a curve. The ridge interval measured in the circumferential direction in the first area and the second area is substantially 1mm, but the ridge interval measured in the direction right-angled to the ridge extending direction is different. That is, the density of the second area is made higher as compared with that of the first area.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic tire, and in particular, a sidewall is provided with a mark such as letters, numbers, symbols or figures, and a large number of small ridges are formed on the surface of the mark. The present invention relates to a pneumatic tire provided with a small interval in the direction.

[0002]

2. Description of the Related Art Generally, tire sidewalls are
Marks such as trade marks and trade dresses that consist of letters, numbers, symbols or figures are provided. Conventionally,
In order to make the marks such as these trademarks and trade dress stand out, place a small interval in the circumferential direction on the surface of the marks such as trademarks and trade dress, which are provided on the surface of the tire sidewall. It has been proposed to provide a large number of small ridges provided in a constant direction in the circumferential direction, radial direction or diagonal direction. For details of the prior art, U.S. Pat. Nos. 4,1987,744, 4,823,856, 5,303,758 and Japanese Utility Model Publication No. 6-
See 6967 and European Patent Publication No. 0611668.

[0003]

However, in the above-mentioned prior art, since the ridges are provided in a constant direction in the circumferential direction, the radial direction or the oblique direction, depending on the direction in which the light rays enter, letters, numbers, symbols or Trademarks and trade dresses made up of figures may be difficult to see.

An object of the present invention is to solve the above problems of the prior art and to provide a tire having excellent visibility of marks such as letters, numbers, symbols or figures provided on the surface of the sidewall. Is to provide.

[0005]

In order to achieve the above object, the pneumatic tire according to the present invention is provided with a mark such as letters, numbers, symbols or figures on the surface of the side wall, and the mark is formed on the surface of the mark. In a pneumatic tire in which small ridges having a height of about 0.3 to 2 mm are provided at equal intervals in the circumferential direction at small intervals of about 0.2 to 5 mm,
(1) In the first region on the surface of the mark, the ridge extends linearly in a direction inclined at a constant angle with respect to the circumferential direction of the tire in parallel or substantially parallel to the adjacent ridge,
(2) In the second region on the surface of the mark, the ridge is in a straight line and / or a curved line parallel or substantially parallel to the adjacent ridge in an inclination direction different from the first region with respect to the circumferential direction of the tire. (3) The ridge spacing measured in the circumferential direction is substantially the same in the first region and the second region, but the ridge spacing measured in the direction perpendicular to the extending direction of the ridge is different. It is a characteristic pneumatic tire.

In order to achieve the above object, in the pneumatic tire according to the present invention, the ridge spacing measured in the direction perpendicular to the extending direction of the ridge in the second region is 0.3 to 5 m.
m is preferable.

To achieve the above object, in the pneumatic tire according to the present invention, in the second region, the ridge spacing measured in the direction perpendicular to the direction in which the ridge extends is 0.5 to 1.
More preferably, it is mm.

In order to achieve the above-mentioned object, in the pneumatic tire according to the present invention, the radial width of the second region forming the mark is 5 to 8 of the radial width of the mark.
It is preferably 0%.

To achieve the above object, in the pneumatic tire according to the present invention, the radial width of the second region forming the mark is 20 to 50% of the radial width of the mark. Is more preferable.

In the prior art, since the ridges are provided in a constant direction in the circumferential direction, the radial direction or the oblique direction and have a monotonous design, they may consist of letters, numbers, symbols or figures depending on the direction in which the light rays enter. Trademarks and trade dresses may be difficult to see. In the pneumatic tire according to the present invention, as mentioned above, the surface of the sidewall is provided with a mark such as letters, numbers, symbols or figures,
In a pneumatic tire in which small ridges having a height of about 0.3 to 2 mm are provided at equal intervals on the surface of the mark at small intervals of about 0.2 to 5 mm in the circumferential direction, In the first region of the surface, the ridge extends linearly in a direction inclined at a constant angle with respect to the circumferential direction of the tire, parallel to or substantially parallel to the adjacent ridge, and the second region of the surface of the mark. Then, the ridge extends in a straight line and / or a curved line parallel or substantially parallel to the adjacent ridge in an inclination direction different from the first region with respect to the circumferential direction of the tire, and the first region and the second region are formed. , The ridge spacing measured in the circumferential direction is substantially the same, but since the ridge spacing measured in the direction perpendicular to the direction in which the ridge extends is different, the balance between light and shadow and the strength of light reflection change slightly. In a situation where light enters from a certain direction I also, character provided on the surface of the side wall, numbers, marks, such as symbol or the figure is likely to be recognized in the visual.

Further, in the pneumatic tire according to the present invention,
In the second region, when the ridge spacing measured in the direction perpendicular to the direction in which the ridge extends is 0.3 to 5 mm, and preferably 0.5 to 1 mm, the letters and numbers provided on the surface of the side wall. It becomes easier to visually recognize a mark such as a trademark or a trade dress made up of symbols or figures.

Further, in the pneumatic tire according to the present invention,
If the radial width of the second region forming the mark is 5 to 80%, preferably 20 to 50% of the radial width of the mark, it is provided on the surface of the sidewall. Marks such as trade marks and trade dresses made up of letters, numbers, symbols, or figures become easier to visually recognize.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 according to the present invention will be described below.
The tires Nos. 3 to 3 and the tires of Conventional Examples 1 to 2 will be described with reference to the drawings.

FIG. 1 is an enlarged view of a main part of a tire according to a first embodiment of the present invention. The tire of Example 1 is provided with a mark such as a trademark or a trade dress made of various characters, numbers, symbols or figures on the surface of the side wall thereof, and the letter "D" forming the trademark DULER. Are shown in FIG. On the surface of the character 1 forming the mark, small ridges 2 having a height of 0.4 mm are provided at equal intervals at small intervals of 1 mm in the circumferential direction. In the first regions A and C of the surface of the character 1 forming the mark, the ridge 1 extends linearly in parallel with the adjacent ridges in a direction inclined at a constant angle of 70 degrees with respect to the circumferential direction of the tire. ing. In the second region B on the surface of the character 1 forming the mark, the ridge 1 extends linearly and curvedly. That is, in the central portion of the second region B, the ridge 1 has an inclination direction different from that of the first region with respect to the tire circumferential direction.
The first region of the second region B extends linearly in a direction inclined at a constant angle of 30 degrees and is substantially parallel to the adjacent ridge.
At both end portions in contact with the regions A and C, the ridges 1 of the first regions A and C extending linearly in a direction inclined at a constant angle of 70 degrees with respect to the tire circumferential direction and 3 with respect to the tire circumferential direction.
It is curved in a small arc smoothly connecting to the ridge 1 of the second region B, which linearly extends in a direction inclined at a constant angle of 0 degree. In the first region and the second region, the ridge spacing measured in the circumferential direction is about 1 mm, which is substantially the same, but the ridge spacing measured in the direction perpendicular to the extending direction of the ridge 1 is different, and is different from the first region. Thus, the density is high in the second region. The radial width h of the second region B is
It is 24% of the radial width H of the character 1 forming the mark.

FIG. 2 is an enlarged view of a main part of the tire according to the second embodiment of the present invention. The tire of Example 2 has the first area A,
In C, the ridge 1 extends in a direction inclined at an angle of 40 degrees with respect to the tire circumferential direction, and in the central portion of the second region B, the ridge 1 is inclined at an angle of 80 degrees with respect to the tire circumferential direction. The ridge spacing measured in the direction perpendicular to the direction in which the ridge 1 extends is larger than that in the first region.
The density is low in the second region, and the second
The radial width h of the area B is the character 1 forming the mark.
The tire is substantially the same as the tire of Example 1 except that it is 34% of the width H in the radial direction.

FIG. 3 is an enlarged view of a main part of a tire of Example 3 according to the present invention. The tire of Example 3 has the first area A,
In C, the ridge 1 extends in a direction inclined at an angle of 50 degrees with respect to the tire circumferential direction, in the second region B, the ridge 1 extends in a curved shape, and is perpendicular to the extending direction of the ridge 1. The ridge spacing measured in the direction is smaller in density in the second region than in the first region, and the radial width h of the second region B is determined by the radial direction of the character 1 forming the mark. Except that it is 32% of the width H of
The tires of Example 1 are almost the same.

FIG. 4 is an enlarged view of a main part of a conventional tire. In the tire of this conventional example, the ridge 1 extends in the direction inclined at a constant angle with respect to the circumferential direction of the tire over the entire area of the character 1 forming the mark, and the first region like the tire of the above-described example. The tire is the same as the tire of Example 1 except that A, C and the second region B are not present.

FIG. 5 is an enlarged view of a main part of a conventional tire. In this conventional tire, the ridge 1 extends in the direction parallel to the circumferential direction of the tire over the entire area of the character 1 forming the mark, and the first regions A, C and The tire is the same as the tire of Example 1 except that the second region B does not exist.

The tires of Examples 1 to 3 and the tires of Conventional Examples 1 and 2 were visually evaluated for the visibility of the mark consisting of the English-language trademark. In the evaluation results, assuming that the evaluation result of the tire of Conventional Example 1 is 100, the tire of Conventional Example 2 is 95 and the tire of Example 1 is 12
0, the tire of Example 2 was 115, and the tire of Example 3 was 1
It was 10. The larger the number, the better the visibility.

[0020]

From the above evaluation results, it is understood that the pneumatic tire of the present invention is excellent in visibility of marks such as trade marks and trade dresses which are composed of letters, numbers, symbols or figures.

[Brief description of drawings]

FIG. 1 is an enlarged view of a main part of a tire according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of a tire according to an embodiment of the present invention.

FIG. 3 is an enlarged view of a main part of a tire according to an embodiment of the present invention.

FIG. 4 is an enlarged view of a main part of a conventional tire.

FIG. 5 is an enlarged view of a main part of a conventional tire.

[Explanation of symbols]

 1 Character forming the mark 2 Ridge

Claims (5)

[Claims] 1. The side wall is provided with a mark such as letters, numbers, symbols or figures, and the surface of the mark has a mark of 0.3.
A small ridge with a height of about 2 mm is 0.2 in the circumferential direction.
In pneumatic tires provided at equal intervals with a small interval of about 5 mm, (1) the first of the surface of the mark.
In the region, the ridge extends linearly in a direction inclined at a constant angle with respect to the circumferential direction of the tire in parallel or substantially parallel to the adjacent ridge, and (2) in the second region of the surface of the mark. The ridge extends in a straight line and / or a curved line parallel to or substantially parallel to the adjacent ridge in an inclination direction different from the first region with respect to the circumferential direction of the tire, (3)
A pneumatic tire characterized in that the ridge spacing measured in the circumferential direction is substantially the same in the first region and the second region, but the ridge spacing measured in the direction perpendicular to the direction in which the ridge extends is different. 2. The pneumatic tire according to claim 1, wherein in the second region, the ridge spacing measured in the direction perpendicular to the extending direction of the ridge is 0.3 to 5 mm. 3. The pneumatic tire according to claim 1, wherein in the second region, the ridge spacing measured in a direction perpendicular to the extending direction of the ridge is 0.5 to 1 mm. 4. The pneumatic product according to claim 1, wherein a radial width of the second region forming the mark is 5 to 80% of a radial width of the mark. tire. 5. The radial width of the second region forming the mark is 20 to 50% of the radial width of the mark.
The pneumatic tire according to any one of claims 1 to 4, wherein: