JP2016088220A - Pneumatic tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily form, on a side part of a tire, an emblem excellent in visibility.SOLUTION: A pneumatic tire has an emblem on a side part. The emblem is configured by a recess 11 or a protrusion 6 formed on the side part 3. An achromatic region 10 is formed on at least a part of a periphery along an outer edge of the emblem.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a pneumatic tire, and more particularly to a pneumatic tire having a mark on its side portion.

Conventionally, as a pneumatic tire, a line for bordering the mark formed on the side portion is provided, and the brightness of the color is changed on one side and the other side in the tire radial direction and the circumferential direction with respect to this line. Is disclosed (for example, see Patent Document 1).
Further, as another pneumatic tire, a configuration is disclosed in which a decorative portion formed on a side portion is positioned in the middle of an inclined surface that causes a height difference (for example, see Patent Document 2). .
Moreover, the structure which provided the convex part which protrudes rather than the surface of a display part in the adjacent area | region with the display part formed in the side part as another pneumatic tire is disclosed (for example, refer patent document 3).

  However, any of the pneumatic tires described above is insufficient to improve the visibility (particularly, the three-dimensionality) of the mark portion. In addition, it is difficult to form a colored region on the inclined surface of the convex portion formed on the side portion.

JP 2012-61971 A JP 2012-76649 A JP 2012-30768 A

  This invention makes it a subject to provide the pneumatic tire which can form easily the mark excellent in visibility in a side part.

As a means for solving the above problems, the present invention provides:
A pneumatic tire having a mark on the side,
The mark is constituted by a concave portion or a convex portion formed on the side portion,
A pneumatic tire is characterized in that a colored region is formed in at least a part of the periphery along the outer edge of the mark.

  With this configuration, that is, a configuration in which a colored region is formed in at least a part of the periphery along the outer edge of the mark, the visibility of the mark portion, particularly the three-dimensionality (degree of feeling three-dimensional) can be improved. . In addition, since the coloring region is formed on the surface of the substantially flat side portion, it can be easily obtained.

  The coloring area may include the mark.

  It is preferable that the coloring area is formed by shifting the position in any of the peripheral directions with respect to the mark.

  With this configuration, the visibility of the mark portion can be further enhanced.

  The colored region may be shifted in position from 0.5% to 40% of the maximum width of the mark with respect to the tire radial direction.

  The colored region may be shifted in position from 0.5% to 40% of the maximum width of the mark relative to the tire circumferential direction.

The concave portion or the convex portion has an inclined surface between an outer edge and a bottom surface or an upper surface,
It is preferable not to form a color region on the inclined surface.

  The said convex part is good also as an edging structure which has a protrusion part which protrudes upwards from an upper surface outer edge part.

  According to the present invention, the mark is composed of a concave portion or a convex portion formed on the side portion, and a colored region is formed on at least a part of the periphery thereof. Can be increased. Further, since the chromatic region is formed on the substantially flat surface of the side portion, it can be easily obtained.

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 of the convex part which concerns on Example 1. FIG. It is a front view of the convex part which concerns on Example 2. FIG. It is a front view of the convex part which concerns on Example 3. FIG. It is a front view of the convex part which concerns on Example 4. FIG. It is a front view of the convex part which concerns on Example 5. FIG. It is a front view of the convex part which concerns on the comparative example 1. FIG. It is sectional drawing which shows the other example of the convex part of FIG. It is sectional drawing which shows the other example of the convex part of FIG. It is sectional drawing which shows the other example of the convex part of 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. Further, 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 T-shaped in a plan view, and 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 (see FIG. 1) in the tire radial direction.

  As shown in FIG. 3, the convex portion 6 has a side surface 7 that extends perpendicularly from the surface of the side portion 3 and an upper surface 8 that is in a positional relationship parallel to the surface of the side portion 3. And the 1st coloring area | region 9 is formed in the upper surface 8 of the convex part 6 by coloring. Further, a second coloring region 10 is formed on the surface of the side portion 3 by coloring the region around the convex portion 6 with a uniform width. The chromatic regions 9 and 10 have colors different from the original colors of the tire. As shown in FIG. 4, the second coloring region 10 is larger than the first coloring region 9 in the circumferential direction of the tire in the maximum width dimension of the mark portion (in the case of T-shape, the length of the upper horizontal line). The position is shifted by a length corresponding to 0.5% to 40% (the range is widened). Further, in the radial direction of the tire, the position is shifted by a length corresponding to 0.5% to 40% of the maximum height dimension of the mark portion (the length in the vertical direction in the case of T-shape) (implementation) Example 1).

  As described above, since the colored region is formed not only on the upper surface 8 of the convex portion 6 but also in the peripheral region of the convex portion 6, the visibility of the convex portion 6 is improved and the state can be viewed more three-dimensionally. It can be.

  In addition, as a printing method of the chromatic regions 9 and 10, in addition to the inkjet method, pad printing, screen printing, thermal transfer, and the like can be given. In addition, the following various patterns are conceivable in the offset direction of the second coloring region 10.

FIG. 5 shows a region in which the first coloring region 9 is offset obliquely downward to the right as a second coloring region 10. Specifically, the first coloring is performed in a direction in which the angle of the counterclockwise direction when the positive direction of the X axis is 0 ° is 315 ° with the XY coordinates having the origin at the center of gravity position on the upper surface 8 of the convex portion 6. The entire position of the region 9 is shifted, and the portion that protrudes from the first chromatic region 9 is defined as a second chromatic region 10 (Example 2). Note that the offset amount in this case is the maximum width dimension of the mark portion in the circumferential direction of the tire with respect to the first coloring region 9 (the upper horizontal line in the case of T-shape), as described in FIG. The length is equivalent to 0.5% to 40% of the maximum length of the mark portion in the radial direction (in the case of T-shape, the length in the vertical direction) is 0.5% to 40%. The length is equivalent to.
In FIG. 6, a region where the first coloring region 9 is offset diagonally to the left is defined as a second coloring region 10. In the XY coordinates, 225 ° is a direction in which the position of the first coloring region 9 is shifted (Example 3).
In FIG. 7, a region in which the first chromatic region 9 is offset diagonally to the upper left is defined as a second chromatic region 10. In the XY coordinates, 135 ° is the direction in which the position of the first coloring region 9 is shifted (Example 4).
FIG. 8 shows a region in which the first coloring region 9 is offset obliquely upward to the right as a second coloring region 10. In the XY coordinates, 45 ° is the direction in which the position of the first coloring region 9 is shifted (Example 5).
6 to 8, the offset amount is the same as that in FIG.
In FIG. 9, only the convex part 6 is formed as a mark, and the colored region is not formed (reference tire: Comparative Example 1).

  Table 1 below shows the results of evaluating the visibility of the tire formed with the mark shown in FIGS. 4 to 9. With respect to the evaluation method, a tire was mounted on a vehicle, and an average value of brightness difference and visibility (stereoscopic feeling and clearness) from a distance of 1 m were evaluated with an index of a reference tire shown in FIG.

  As is clear from Table 1, in any example in which the second color region 10 was formed, the average value of the luminance difference and the visibility could be improved. In particular, as in Example 1, the best index could be obtained by offsetting the second coloring region 10 diagonally downward to the right.

  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 second color region 10 is formed in each region shown in FIGS. 4 to 8. However, the second color region 10 is not necessarily limited to these positions. It is also possible to form at any offset position.

  Moreover, in the said embodiment, although the mark was comprised only with the convex part 6 formed in the side part 3, it can also be set as the following structures.

  In FIG. 10, a mark is formed by forming a recess 12 on the surface of the side portion 3. Here, the first color region 9 is formed on the bottom surface of the recess 12, and the second color region 10 is formed on a region outside the opening edge of the recess 12.

  FIG. 11 shows what formed the recessed part 11 in the outer surface of the convex part 6, and comprised the mark with what is called a border structure. Here, the depth dimension of the recess 11 is approximately half of the protrusion dimension of the protrusion 6 from the outer surface of the side part 3. In this case, the first coloring region 9 may also be formed on the bottom surface of the recess 11.

  In FIG. 12, the side surface 7 of the convex portion 6 is constituted by an inclined surface 13 that gradually decreases toward the outside. The inclined surface 13 is not colored, the first colored region 9 is formed on the upper flat surface, and the second colored region is formed on any part of the periphery of the convex portion 6, represented by FIGS. 4 to 8. Region 10 is formed.

  In the above embodiment, the first chromatic region 9 and the second chromatic region 10 are formed in the same color, but at least one of hue, lightness, and saturation, which are the three attributes of color, is used. May be changed.

  In the above-described embodiment, the chromatic area is configured with the same tone color, but the color density, brightness, darkness, and hue in various directions such as the circumferential direction and radial direction of the tire, or from the center to the periphery, etc. It may be a gradation that gradually changes step by step.

  In the above embodiment, the first color region 9 is formed on the upper surface of the convex portion 6 or the bottom surface of the concave portion 12, but the first color region 9 is not necessarily required.

DESCRIPTION OF SYMBOLS 1 ... Tread part 2 ... Shoulder part 3 ... Side part 4 ... Bead part 4 ... Bead core 6 ... Convex part 7 ... Side surface 8 ... Upper surface 9 ... 1st coloring area 10 ... 2nd coloring area 11 ... Concave part 12 ... Concave part 13 ... Inclination surface

Claims (7)

A pneumatic tire having a mark on the side,
The mark is constituted by a concave portion or a convex portion formed on the side portion,
A pneumatic tire characterized in that a colored region is formed in at least a part of the periphery along the outer edge of the mark.   The pneumatic tire according to claim 1, wherein the coloring region includes the mark.   3. The pneumatic tire according to claim 1, wherein the coloring region is formed by shifting a position in any one of peripheral directions with respect to the mark.   4. The pneumatic tire according to claim 3, wherein the coloring region is displaced in a dimension of 0.5% to 40% of a maximum width dimension of the mark with respect to a tire radial direction.   5. The pneumatic tire according to claim 3, wherein the coloring region is displaced in a dimension of 0.5% to 40% of a maximum width dimension of the mark with respect to a tire circumferential direction. The concave portion or the convex portion has an inclined surface between an outer edge and a bottom surface or an upper surface,
The pneumatic tire according to any one of claims 1 to 5, wherein a colored region is not formed on the inclined surface.   The pneumatic tire according to any one of claims 1 to 6, wherein the convex portion has an edged structure having a protruding portion protruding upward from an outer edge portion of the upper surface.

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