JP6212440B2 - Pneumatic tire - Google Patents

Description

  The present invention relates to a pneumatic tire.

Conventionally, there are some which are indicated by patent documents 1 to 3 as a pneumatic tire.
Patent Document 1 includes a mark that is edged with a line on the outer surface of the side part, and the line has a light line part that is lighter than the color of the mark on one side in the tire radial direction and the tire circumferential direction, A configuration is disclosed in which the other side is a dark line portion darker than the color of the mark.
Patent Document 2 discloses a configuration in which a slightly protruding relief element is formed on a vulcanized surface of a molded rubber article, and a decal support on which colored ink is deposited is thermally transferred.
In Patent Document 3, a serration processing portion including a plurality of ridges arranged so as to extend in parallel is formed on the outer surface of the sidewall portion, and the trough portion located between the ridges of the serration processing portion is formed. A configuration in which a chromatic color layer is arranged is disclosed.

However, in Patent Document 1, a light color line portion and a dark color line portion are provided on a mark so that the mark can be seen three-dimensionally. For this reason, there is a problem that the stereoscopic effect is lost as the brightness of the bright line portion is lost due to dirt or the like.
In Patent Document 2, a decal support on which colored ink is deposited must be accurately positioned with respect to a relief element formed on a vulcanized surface of a molded rubber article, and cannot be thermally transferred to a desired position. There is a problem.
In Patent Document 3, since the chromatic color layer is only arranged on the side surface, there is a problem that durability and weather resistance are weak and decorativeness cannot be maintained.

JP 2012-61971 A Japanese Patent No. 4404384 JP 2014-19367 A

  This invention makes it a subject to enable it to display the mark formed in the side part of a tire in the state which was three-dimensional and excellent in visibility, without requiring highly accurate position alignment. .

As a means for solving the above problems, the present invention provides:
A pneumatic tire having a mark on the side,
The side portion includes a convex portion that protrudes from the outer surface of the side portion and has a display surface on which the mark is displayed.
The display surface includes a recess indicating a main body portion of the mark, and an edge portion of the mark formed so as to surround the recess.
A colored region is formed on the outer surface of the edging portion by being offset inward from the outer edge of the outer surface.

  With this configuration, the coloring region is formed on the inner side of the outer edge of the outer surface of the edging portion, so that highly accurate alignment is not required. Further, since the edge portion protrudes from the other portions, the function as a mark can be maintained by the protruded edge portion even if the colored region is removed by peeling or the like.

  It is preferable that the coloring region has different offset amounts from the outer edge of the outer surface of the border portion.

  For example, the color region may be different in the offset amount in the tire radial direction.

  Further, in the coloring region, the offset amount may be different in the tire circumferential direction.

  With such a configuration, it is possible to change the occupancy position of the colored portion on the outer surface of the rim portion so as to make a difference in luminance difference, thereby bringing about a change in visibility including a stereoscopic effect.

  It is preferable that the color areas have different width dimensions on the outer surface of the border portion.

  Moreover, you may make it the said coloring area | region make the said width dimension differ in a tire radial direction.

  The colored area may have the width dimension different in the tire circumferential direction.

  With these configurations, it is possible to make a difference in luminance difference by changing the area occupied by the colored portion on the outer surface of the edging portion, and bring about a change in visibility including a three-dimensional effect.

  The mark is preferably formed in the range of 30 to 75% of the tire cross-section height.

  The mark preferably has a length of 15 to 45% of the tire cross-sectional height in the tire radial direction.

  According to the present invention, the mark formed on the convex portion of the side portion is composed of the main body portion of the mark formed of the concave portion formed on the convex portion and the rim portion of the mark formed so as to surround the concave portion. The coloring region is formed on the outer surface of the edging portion by being offset inward from the outer edge. Therefore, it is possible to easily form the chromatic region without increasing the positioning accuracy, and it is possible to ensure the visibility with a stereoscopic effect. Further, even if the coloring region is peeled off, the distinguishability of the mark itself can be maintained by the protruding border portion.

It is a half section view in the meridian direction showing the outline of the tire concerning this embodiment. It is a front view which shows the side part of the tire shown in FIG. It is the sectional view on the AA line which shows the convex part of FIG. It is a front view which shows an example of the convex part of FIG. It is a front view which shows an example of the convex part of FIG. It is a front view which shows an example of the convex part of FIG. It is a front view which shows an example of the convex part of FIG. It is a front view which shows an example of the convex part of FIG. It is a front view which shows an example of the convex part of FIG. It is a front view which shows an example of the convex part of FIG. It is a front view which shows an example of the convex part of FIG. It is a front view which shows an example of the convex part of FIG. It is a front view which shows an example of the convex part of FIG. It is a front view which shows an example of the convex part of FIG. It is a fragmentary sectional view of the recessed part shown in FIG.

  Embodiments according to the present invention will be described below with reference to the accompanying drawings. In addition, the following description is only illustrations essentially and does not intend restrict | limiting this invention, its application thing, or its use. Furthermore, the drawings are schematic, and the ratio of each dimension is different from the actual one.

  FIG. 1 is a partial schematic cross-sectional view of the pneumatic tire according to this embodiment on the meridian surface. In this pneumatic tire, the external structure includes a tread portion 1, a shoulder portion 2, a side portion 3, and a bead portion 4. Note that the internal structure other than the bead core 5 is omitted.

As shown in FIG. 2, a convex portion 6 for displaying a mark is formed on the outer surface of the side portion 3. Here, the convex part 6 is formed in four equal parts in the circumferential direction of the tire. And this convex part 6 is formed so that it may have a length of 15 to 45% of the tire cross-section height in the tire radial direction.
As shown in FIG. 3, a concave portion 7 is formed on the outer surface of the convex portion 6, and constitutes a main body portion of the mark. Here, the depth dimension of the concave portion 7 is set to be approximately half of the projecting dimension of the convex portion 6 from the outer surface of the side portion 3. FIG. 2 shows a recess 7 having a shape corresponding to the letters “T” and “O”.

  A portion surrounding the concave portion 7 is an edge portion 8 of the mark, and a white coloring region 9 is formed on the outer surface thereof, for example. The chromatic region 9 is printed while being offset inward from the outer edge of the outer surface of the edging portion 8. As a printing method of the chromatic region 9, in addition to the inkjet method, pad printing, screen printing, thermal transfer, and the like can be given. In addition, the following various patterns can be considered as the offset method of the chromatic region 9. Here, the width dimension (border width) of the edge portion 8 is set to 3 mm or more, and the offset amount is in the range of 0.5% to 40% of the edge width.

4 to 9, the border width is set uniformly over the entire circumference of the mark.
In FIG. 4, the chromatic region 9 is formed at a reference position where the offset amount is uniform over the entire circumference of the mark (reference tire).
In FIG. 5, the offset amount of the coloring region 9 is shifted only in the tire outer diameter direction from the reference position shown in FIG. 4.
In FIG. 6, the offset amount of the coloring region 9 is shifted only in the tire inner diameter direction from the reference position shown in FIG. 4.
In FIG. 7, the offset amount of the coloring region 9 is shifted only from the reference position shown in FIG. 4 in the tire circumferential direction (rotation direction: rotation direction when the vehicle moves forward).
In FIG. 8, the offset amount of the coloring region 9 is shifted only in the circumferential direction of the tire (the direction opposite to the rotation direction) from the reference position shown in FIG. 4.
In FIG. 9, the offset amount of the coloring region 9 is shifted from the reference position shown in FIG. 4 in the tire radial direction and the tire circumferential direction.

10 to 14, the border width is changed. The offset amount of the chromatic region 9 is the same as that shown in FIGS.
In FIG. 10, the border width is further changed. The border width is offset only in the outer diameter direction of the tire from the reference width shown in FIG. 4 which is uniform over the entire circumference. Therefore, the border width becomes narrower on the outer diameter direction side of the tire and becomes wider on the inner diameter direction side.
In FIG. 11, the border width is offset only in the inner diameter direction of the tire from the reference width shown in FIG. 4 which is uniform over the entire circumference.
In FIG. 12, the border width is offset only in the tire circumferential direction (rotational direction) from the reference width shown in FIG. 4 which is uniform over the entire circumference.
In FIG. 13, the border width is offset only in the circumferential direction of the tire (the direction opposite to the rotational direction) from the reference width shown in FIG. 4 which is uniform over the entire circumference.
In FIG. 14, the border width is offset from the reference width shown in FIG. 4 which is uniform over the entire circumference in both the radial direction and the circumferential direction of the tire.

  Although the convex part 6 is provided in the side part 3 of a tire as above-mentioned, the position is the range of 30 to 75% of tire cross-section height. For example, in the case of a 225 / 50R18 tire, the tire cross-section height is 112.5 mm, and the convex portion 6 may be provided in the range of 33.75 mm to 84.375 mm.

  Table 1 below shows the evaluation results of the visibility of the tire on which the mark shown in FIGS. 5 to 14 is formed. In the evaluation method, a tire was mounted on a vehicle, and the visibility (three-dimensional effect and clearness) was evaluated from a distance of 1 m, with the index of the reference tire shown in FIG.

  As is clear from Table 1, the visibility could be improved even when the colored region was offset in either the radial direction or the circumferential direction of the tire. In particular, the visibility could be enhanced most by offsetting in both the radial direction and the circumferential direction of the tire.

  In addition, this invention is not limited to the structure described in the said embodiment, A various change is possible.

  For example, in the above-described embodiment, the case where the coloring region 9 is offset in the radial direction, the circumferential direction, and both of the tire has been described. Any value can be taken. And by these structures, the visibility which was excellent similarly to the above can be exhibited.

  Moreover, in the said embodiment, although the mark was provided in four places equally in the circumferential direction of the side part 3, the number is free and it is not necessary to arrange | position equally.

  In the above embodiment, the border width is changed only when the chromatic region 9 is offset. However, it is also possible to change only the border width while keeping the chromatic region 9 as the reference position.

  Moreover, in the said embodiment, although the bottom face of the recessed part 7 formed in the convex part 6 was comprised by the flat surface, as shown in FIG. 15, you may make it form an unevenness | corrugation. The unevenness can be formed by a plurality of protrusions or a plurality of parallel protrusions.

DESCRIPTION OF SYMBOLS 1 ... Tread part 2 ... Shoulder part 3 ... Side part 4 ... Bead part 5 ... Bead core 6 ... Convex part 7 ... Concave part 8 ... Border part 9 ... Colored area

Claims (9)

A pneumatic tire having a mark on the side,
The side portion includes a convex portion that protrudes from the outer surface of the side portion and has a display surface on which the mark is displayed.
The display surface includes a recess indicating a main body portion of the mark, and an edge portion of the mark formed so as to surround the recess.
A pneumatic tire characterized in that a colored region is formed on the outer surface of the edging portion by being offset inward from the outer edge of the outer surface.   2. The pneumatic tire according to claim 1, wherein the coloring region has a different offset amount from an outer edge of an outer surface of the edging portion.   The pneumatic tire according to claim 2, wherein the coloring region has the offset amount different in a tire radial direction.   The pneumatic tire according to claim 2 or 3, wherein the coloring region has the offset amount different in a tire circumferential direction.   The pneumatic tire according to any one of claims 1 to 4, wherein the coloring region has different width dimensions on the outer surface of the border portion.   The pneumatic tire according to claim 5, wherein the colored region has the width dimension different in a tire radial direction.   The pneumatic tire according to claim 5 or 6, wherein the colored region has the width dimension different in a tire circumferential direction.   The pneumatic tire according to any one of claims 1 to 7, wherein the mark is formed in a range of 30 to 75% of a tire cross-sectional height.   The pneumatic tire according to any one of claims 1 to 8, wherein the mark has a length of 15 to 45% of a tire cross-sectional height in a tire radial direction.

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