JP2016084041A - Pneumatic tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tire such that unevenness of a tire side part is made inconspicuous and external appearance of the tire side part is improved.SOLUTION: A decorative recessed part 18 has a first-directional ridge pattern and a second-directional ridge pattern arranged alternately. The first-directional ridge pattern 20 has a plurality of main ridges 22A-22D and sub-ridges 26A-26D, projecting from a bottom face 18A, formed. The respective ridges are arranged in parallel such that the ridges extend in the same direction.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a pneumatic tire in which a plurality of ridges are formed 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. In order to reduce the weight of the tire, the thickness of the tire side is reduced. However, when the thickness of the tire side is reduced, unevenness due to the end of a member such as a belt may appear on the surface of the tire side. In order to make such unevenness inconspicuous, the above-mentioned side decorative band is effective.

  For example, Patent Document 1 discloses a side decorative band composed of a decorative element A1, a decorative element B1, and a decorative element C1. By forming the side decoration band on the tire side portion, an effect of making the unevenness of the side portion of the tire inconspicuous can be obtained.

JP 2011-126335 A

  Since the tire side portion is visible even when the tire is mounted, further improvement in appearance is required.

  In view of the above facts, an object of the present invention is to provide a pneumatic tire in which the unevenness of the tire side portion is made inconspicuous and the appearance of the tire side portion is improved.

  The pneumatic tire according to claim 1 is a plurality of main parts arranged in parallel so that a decorative recess formed on the outer surface of the tire side part and a projecting direction extending from the bottom surface of the decorative recess become the first direction. A high ridge region having a ridge, and a plurality of subbridges that are arranged in parallel so that the extending direction of the decorative concave portion protrudes from the decorative recess is the first direction, and the protruding height from the bottom surface is lower than the main ridge. A first ridge pattern including a low ridge region, the high ridge region in which the extension direction of the main ridge is a second direction different from the first direction, and the extension direction of the subbridge is the first direction. A second direction ridge pattern including the low ridge region in the second direction different from the direction, and the first direction ridge pattern and the second direction ridge pattern include the mounting direction. And a plurality of alternately arranged in the recess.

  According to the first aspect of the present invention, a decorative recess is formed in the tire side portion, and a plurality of first direction ridge patterns and second direction ridge patterns are arranged in the decorative recess. The first direction ridge pattern is formed with a high ridge region having a plurality of main ridges and a low ridge region having a plurality of sub-bridges, which are arranged in parallel with each other extending in the first direction. The protruding height from the bottom surface of the bridge is lower than the protruding height from the bottom surface of the main ridge. On the other hand, the second direction ridge pattern includes a high ridge region in which the extending direction of the main ridge is a second direction different from the first direction, and a low ridge region in which the extending direction of the subbridge is a second direction different from the first direction. And. That is, the second direction ridge pattern is formed by rotating the first direction ridge pattern so that the extending direction of the main ridge and the sub-bridge is a second direction different from the first direction. It has the same main ridge and subbridge. The first direction ridge pattern and the second direction ridge pattern are alternately arranged. In this way, by alternately arranging ridge patterns including high ridge regions and low ridge regions having different ridge heights by changing the extending direction of the ridges, incident light can be reflected in multiple directions, and The part can be shown three-dimensionally. Therefore, in the tire side portion, a difference in shadow due to a difference in reflection of light (sunlight, ambient light, etc.) can be effectively produced.

  Further, by providing the decorative concave portion in which the ridge pattern capable of producing a difference in shadow is arranged in this way, the unevenness on the outer surface of the tire side portion having a relatively low spatial frequency can be made inconspicuous.

  The pneumatic tire according to claim 2, wherein the first direction ridge pattern and the second direction ridge pattern include a plurality of the high ridge region and the low ridge region in the decorative recess such that each of the high ridge region and the low ridge region extends in a zigzag shape. Has been placed.

  According to the pneumatic tire according to claim 2, the zigzag shape constituted by the high ridge region and the zigzag shape constituted by the low ridge region are respectively formed so as to extend incident light effectively in multiple directions. The difference in shading due to the difference in light reflection can be more effectively produced in the tire side portion.

  In the pneumatic tire according to a third aspect, the zigzag shape extends in a direction intersecting the tire circumferential direction.

  According to the pneumatic tire according to claim 3, the zigzag shape constituted by the high ridge region and the zigzag shape constituted by the low ridge region are extended in a direction intersecting the tire circumferential direction. Propagation of cracks that are likely to occur along the circumferential direction can be suppressed.

  In the pneumatic tire according to a fourth aspect, the high ridge region and the low ridge region are arranged alternately in the tire circumferential direction.

  According to the pneumatic tire according to claim 4, since the high ridge region and the low ridge region are alternately arranged in the tire circumferential direction, the portion is more effectively three-dimensionally using the height difference. Can show.

  The pneumatic tire according to claim 5 is characterized in that the ridge interval between the adjacent main ridges is wider than the ridge interval between the sub-bridges.

  According to the pneumatic tire of the fifth aspect, the height difference can be produced more effectively by setting the ridge intervals of the high ridge region and the low ridge region as described above.

  The pneumatic tire according to claim 6, wherein the ridge interval between the adjacent main ridges and the ridge interval between the sub-bridges are such that the high ridge region of the low ridge region from the side far from the low ridge region of the high ridge region. It is characterized by becoming narrower toward the far side.

  According to the pneumatic tire of the sixth aspect, the interval between adjacent ridges gradually decreases from the main ridge side arranged at one end in one ridge pattern toward the sub-bridge side arranged at the other end. Therefore, it is possible to produce a difference in shadow due to stepwise light reflection, and to more effectively produce a stereoscopic effect in the high ridge region and the low ridge region.

  The pneumatic tire according to claim 7 is characterized in that the main ridge and the bridge are zigzag-shaped.

  According to the pneumatic tire according to claim 7, since each of the high ridge and the low ridge is zigzag-shaped, the difference in shadow due to the difference in the reflection of light is effectively produced by reflecting the light in multiple directions. can do.

  The pneumatic tire according to claim 8, wherein the main ridge is connected to the main ridge in the high ridge region and in the adjacent high ridge region, and is continuous from one end to the other end of the decorative recess. Is configured.

  When processing the mold for forming the main ridge, if the main ridge is interrupted for each ridge pattern, the processing blade needs to be moved up and down each time the main ridge is interrupted. In the pneumatic tire according to the eighth aspect, the main ridge is connected to form a continuous main ridge line continuous from one end to the other end of the decorative recess. Therefore, the above-described vertical movement of the blade becomes unnecessary, and the groove for the main ridge can be easily processed.

  In the pneumatic tire according to claim 9, the protrusion height of the main ridge from the bottom surface is from the side far from the low ridge region of the high ridge region to the side far from the high ridge region of the low ridge region. It is characterized by gradually lowering.

  According to the pneumatic tire of the ninth aspect, the height of the ridge gradually decreases from the main ridge side arranged at one end in one ridge pattern toward the bridge side arranged at the other end. Accordingly, it is possible to extend the difference in shadow due to the stepwise reflection of light, and it is possible to more effectively produce a stereoscopic effect in each of the wide interval ridge region and the narrow interval ridge region.

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

1 is a side view of a pneumatic tire according to a first embodiment. It is a part of the side decoration part of the pneumatic tire which concerns on 1st Embodiment. It is a partial enlarged view of the side decoration part of the pneumatic tire which concerns on 1st Embodiment. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. It is sectional drawing of the modification of the side decoration part of the tire of 1st Embodiment. It is sectional drawing of the modification of the side decoration part of the tire of 1st Embodiment. It is a side view of the pneumatic tire which concerns on 2nd Embodiment. It is a part of side decoration part of the pneumatic tire which concerns on 2nd Embodiment. It is a partial enlarged view of the side decoration part of the pneumatic tire which concerns on 2nd Embodiment. It is sectional drawing of the 9-9 line | wire of FIG. It is sectional drawing of the modification of the side decoration part of 2nd Embodiment. It is sectional drawing of the modification of the side decoration part of 2nd Embodiment.

  [First Embodiment]

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a side view of a pneumatic tire 10 according to the present embodiment. In the present embodiment, the tire circumferential direction is indicated by U, and the tire radial direction is indicated by R.

  A mark portion 14 and a side decoration band 16 are formed on the tire side portion 12 of the pneumatic tire 10.

  The mark portion 14 has a belt-like arc shape and is formed at two symmetrical positions with the tire center axis CE (see FIG. 1) in between. In the mark part 14, a mark 14A is arranged. The mark 14A is displayed by, for example, characters “ABCDEFGH” displayed on a smooth surface.

  The side decorative strips 16 are formed in an arc shape along the tire circumferential direction U, and are formed so as to be adjacent to both end portions of the mark portion 14.

  As shown in FIG. 2, a decorative recess 18 is formed in the side decorative band 16. The decorative recess 18 has a shape recessed from the outer surface of the tire side portion 12 and constitutes the outer shape of the side decorative band 16. On the bottom surface 18 </ b> A of the decorative recess 18, the first direction ridge pattern 20 and the second direction ridge pattern 30 are alternately arranged. The first direction ridge pattern 20 and the second direction ridge pattern 30 have the same shape and differ only in the arrangement angle.

  As shown in FIG. 3, the first direction ridge pattern 20 has a substantially square shape, and includes a main ridge region 24 as a substantially rectangular high ridge region and a sub-bridge region 28 as a low ridge region. Yes. In the main ridge region 24, four main ridges 22A, 22B, 22C, and 22D are formed in parallel so as to be parallel to each other. The main ridges 22 </ b> A, 22 </ b> B, 22 </ b> C, and 22 </ b> D have a zigzag shape and extend in a first direction X <b> 1 that is slightly inclined with respect to the tire circumferential direction U. The zigzag bending angles θ1 to θ4 of the main ridges 22A, 22B, 22C, and 22D are the sharpest angles of the main ridge 22A, and the angles widen toward the main ridge 22D, and the main ridge 22D is the obtuse angle. That is, θ1 <θ2 <θ3 <θ4.

  As shown in FIG. 4, the main ridges 22A, 22B, 22C, and 22D protrude from the bottom surface 18A at a height H1. The height H1 is set within a range of 0.08 to 3.0 mm. The cross-sectional shapes of the main ridges 22A, 22B, 22C, and 22D are trapezoids that gradually taper from the bottom surface 18A. The bottom surfaces of the main ridges 22A, 22B, 22C, and 22D have a width W1. The width W1 is set within a range of 0.08 to 3.0 mm. A groove 23A having a groove width M1 is formed between the main ridge 22A and the main ridge 22B, and a groove 23B having a groove width M2 is formed between the main ridge 22B and the main ridge 22C. A groove 23C having a groove width M3 is formed between 22D.

  As shown in FIG. 3, the bridge region 28 is adjacent to the main ridge region 24. The four bridges 26A, 26B, 26C, and 26D are formed in parallel in the surbridge region 28 so as to be parallel to each other. The bridges 26A, 26B, 26C, and 26D have a zigzag shape and extend in the first direction X1 that is the same as the main ridges 22A, 22B, 22C, and 22D. The zigzag bending angles θ5 to θ8 of the sub-bridges 26A, 26B, 26C, and 26D are the acute angles of the sub-bridge 26A, the angles are widened toward the sub-bridge 26D side, and the sub-bridge 26D is the obtuse angle. That is, θ1 <θ2 <θ3 <θ4. The zigzag bending angle θ5 of the surbridge 26A is larger than the zigzag bending angle θ4 of the main ridge 22D.

  As shown in FIG. 4, the bridges 26A, 26B, 26C, and 26D protrude from the bottom surface 18A at a height H2 that is lower than the height H1. The height H2 is set within a range of 0.05 to 2.0 mm. The cross sections of the bridges 26A, 26B, 26C, and 26D are trapezoids that gradually taper from the bottom surface 18A. The bottom surfaces of the bridges 26A, 26B, 26C, and 26D have a width W2 that is narrower than the width W1. The width W2 is set within a range of 0.05 to 2.0 mm. A groove 23D having a groove width M4 is formed between the main ridge 22D and the sub-bridge 26A. A groove portion 27A having a groove width M5 is formed between the subbridge 26A and the subbridge 26B, a groove portion 27B having a groove width M6 is formed between the subbridge 26B and the subbridge 26C, and between the subbridge 26C and the subbridge 26D, A groove portion 27C having a groove width M7 is formed.

  In the first direction ridge pattern 20, the groove width between the ridges is the largest in the groove 23A and gradually decreases toward the support 26D side, and M1> M2> M3> M4> M5> M6> M7. It has become.

  The second direction ridge pattern 30 has the same shape as that of the first direction ridge pattern 20, but is arranged by rotating the first direction ridge pattern 20 by 90 degrees. The main ridge region 34 and the bridge region 38 of the second direction ridge pattern 30 correspond to the main ridge region 24 and the bridge region 28 of the first direction ridge pattern 20, respectively. The main ridges 32A, 32B, 32C, 32D of the second direction ridge pattern 30 correspond to the main ridges 22A, 22B, 22C, 22D of the first direction ridge pattern 20, and the sub-bridges 36A, 36B, 36C and 36D correspond to the sub-bridges 26A, 26B, 26C and 26D of the first direction ridge pattern 20.

  Further, the grooves 33A, 33B, 33C, 33D, 37A, 37B, and 37C of the second direction ridge pattern 30 correspond to the grooves 23A, 23B, 23C, 23D, 27A, 27B, and 27C of the first direction ridge pattern 20, respectively. ing. The main ridges 32A, 32B, 32C, 32D and the bridges 36A, 36B, 36C, 36D extend in a second direction Y1 that is slightly inclined with respect to the tire radial direction R.

  The first direction ridge pattern 20 and the second direction ridge pattern 30 are alternately arranged on the bottom surface 18 A of the decorative recess 18, and the entire decorative recess 18 is formed by the first direction ridge pattern 20 and the second direction ridge pattern 30. It is decorated. The main ridge region 24 and the main ridge region 34 of the adjacent first direction ridge pattern 20 and second direction ridge pattern 30 are adjacent to each other in the longitudinal direction at an angle of 90 degrees, and the zigzag main ridge line has a zigzag shape. 21 is formed. The zigzag main ridge line 21 extends in a direction intersecting the tire circumferential direction U.

The first bridge ridge pattern 20 and the second bridge ridge pattern 30 of the second ridge pattern 30 are adjacent to each other at an angle of 90 degrees to form a zigzag bridge line 31 having a zigzag shape. The zigzag bridge line 31 extends in the same direction as the zigzag main ridge line 21.

The zigzag main ridge lines 21 and the zigzag bridge lines 31 are alternately arranged in the tire circumferential direction.

  As described above, the side decoration band 16 has the first direction ridge pattern 20 including the main ridge region 24 and the bridge region 28, and the second direction including the main ridge region 34 and the bridge region 38, which have different protrusion heights of the ridges. The ridge pattern 30 is formed by alternately arranging ridge extending directions. As a result, the incident light can be reflected in multiple directions, and the side decoration band 16 can be seen in three dimensions, and shadows due to differences in the reflection of light (sunlight, ambient light, etc.) can be seen in the tire side portion. The difference can be effectively produced. Furthermore, since the main ridge regions 24 and 34 and the bridge regions 28 and 38 have different intervals between the ridges, the three-dimensional effect of the side decoration band 16 can be more effectively produced by the visual effect due to the density of the ridges. it can.

  Further, the side decoration band 16 has a zigzag zigzag main ridge line 21 composed of main ridge regions 24, 34 and a zigzag zigzag bridge line 31 composed of support bridge regions 28, 38. . Therefore, incident light can be effectively reflected in more directions, and a difference in shadow due to a difference in light reflection can be effectively produced in the tire side portion.

In the side decorative band 16, the zigzag main ridge line 21 and the zigzag bridge line 31 extend in a direction intersecting the tire circumferential direction U. Therefore, propagation of cracks that are likely to occur along the tire circumferential direction U can be suppressed. Furthermore, since the zigzag main ridge line 21 and the zigzag bridge line 31 are alternately arranged in the tire circumferential direction, the portion can be more effectively viewed in three dimensions using the height difference.

  In the first direction ridge pattern 20 and the second direction ridge pattern 30, the groove width between adjacent ridges is gradually narrowed from the main ridges 22A and 32A toward the subbridges 26D and 36D. As a result, it is possible to produce the ridges in the main ridge regions 24 and 34 and the bridge regions 28 and 38 so as to change in height.

  In this embodiment, all the groove widths between adjacent ridges are changed. However, as shown in FIG. 5A, the groove portions 23A, 23B, 23C, 23D, 27A, 27B, 27C, and a groove portion 33A (not shown) 33B, 33C, 33D, 37A, 37B, and 37C may all have the same groove width M8.

  Further, as shown in FIG. 5B, the groove widths of the groove portions 23A, 23B, 23C, 33A, 33B, and 33C in the main ridge regions 24 and 34 are set to the same width M8, and the groove portions 27A, 27B in the surbridge regions 28 and 38, The groove widths of 27C, 37A, 37B, and 37C may be the same width M9. In this case, the groove widths of the groove portions in the main ridge regions 24 and 34 are made wider than the groove widths of the groove portions in the support bridge regions 28 and 38.

  In the present embodiment, in the first direction ridge pattern 20 and the second direction ridge pattern 30, the protrusion height of the ridge is two steps, but from the main ridge 22A, 32A side toward the subbridge 26D, 36D side. The protrusion height may be gradually lowered.

  [Second Embodiment]

  Next, a second embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 6, a mark portion 14 and a side decoration band 46 are formed on the tire side portion 12 of the pneumatic tire 40 of the present embodiment. A decorative recess 48 is formed in the side decorative band 46 (see FIG. 7). The decorative recess 48 has a shape recessed from the outer surface of the tire side portion 12 and constitutes the outer shape of the side decorative band 46.

  As shown in FIG. 7, the first direction ridge pattern 50 and the second direction ridge pattern 60 are alternately arranged on the bottom surface 48 </ b> A of the decorative recess 48. The first direction ridge pattern 50 has a substantially square shape, and includes a main ridge region 54 and a bridge region 58 each having a substantially rectangular shape as shown in FIG.

  In the main ridge region 54, two main ridges 52A and 52B are arranged in parallel so as to be parallel to each other. The main ridges 52 </ b> A and 52 </ b> B extend in a first direction X <b> 2 that is inclined with respect to the tire circumferential direction U, and extend from one end side to the other end side of the square of the first direction ridge pattern 50. As shown in FIG. 9, the main ridges 52A and 52B protrude from the bottom surface 48A at a height H3. The height H3 is set within a range of 0.08 to 3.0 mm.

  One end side of the main ridge 52A and one end side of the main ridge 52B are connected by an end ridge 52C. As with the main ridges 52A and 52B, the end ridge 52C protrudes from the bottom surface 48A at a height H3. The end ridge 52C extends from one end side of the main ridge 52A to one end side of the main ridge 52B in a direction orthogonal to the first direction X2. The main ridges 52A and 52B and the end ridge 52C form a substantially U-shaped ridge that extends from the other end of the first direction ridge pattern 50 to one end, folds back at one end, and returns to the other end. Yes.

  A short connection ridge 52D is formed on the other end side of the main ridge 52A. The short connecting ridge 52D is bent at a substantially right angle from the other end of the main ridge 52A to the opposite side of the main ridge 52B, and is formed to the corner of the first direction ridge pattern 50. A long connection ridge 52E is formed on the other end side of the main ridge 52B. The long connection ridge 52E is bent at a substantially right angle from the other end of the main ridge 52B to the opposite side of the main ridge 52A, and is formed to the corner of the first direction ridge pattern 50.

  The main ridges 52A, 52B, end ridges 52C, short connection ridges 52D, and long connection ridges 52E have a trapezoidal shape that gradually tapers from the bottom surface 48A, and the bottom surface has a width W3. The width W3 is set within a range of 0.08 to 3.0 mm.

  The four bridges 56A, 56B, 56C, and 56D are formed in parallel in the bridge region 58 so as to be parallel to each other. The bridges 56A, 56B, 56C, and 56D protrude from the bottom surface 48A at a height H4 that is lower than the height H3, and extend in the first direction X2. The other end is connected to the long connection ridge 52E, and one end extends to the other end of the square of the first direction ridge pattern 50. The height H4 is set within a range of 0.05 to 2.0 mm.

  One end side of the sub-bridge 56A and one end side of the sub-bridge 56B are connected by an end ridge 56E, and one end side of the sub-bridge 56C and one end side of the sub-bridge 56D are connected by an end ridge 56F. The end ridges 56E and 56F are arranged in a direction orthogonal to the first direction X2. Each of the bridges 56A and 56B, the end ridge 56E, the bridges 56C and 56D, and the end ridge 56F extends from the long connection ridge 52E of the first direction ridge pattern 50 to one end side, and is folded at one end side to be turned back into the long connection ridge 52E. A substantially U-shaped ridge is formed to return to the top.

  As shown in FIG. 9, the bridges 56A, 56B, 56C, 56D and the end ridges 56E, 56F are trapezoids that gradually taper from the bottom surface 48A, and the bottom surface has a width W4. The width W4 is set within a range of 0.05 to 2.0 mm.

  A groove 53A having a groove width M10 is formed between the main ridge 52A and the main ridge 52B, and a groove 53B having a groove width M12 is formed between the main ridge 52B and the bridge 56A. A groove portion 53C having a groove width M14 is formed between the sub-bridge 56A and the sub-bridge 56B, a groove portion 53D having a groove width M16 is formed between the sub-bridge 56B and the sub-bridge 56C, and between the sub-bridge 56C and the sub-bridge 56D, A groove 53E having a groove width M18 is formed. The groove width of these groove portions is the largest at the groove portion 53A, and becomes narrower in order toward the bridge 56D side, and M10> M12> M14> M16> M18.

  The second direction ridge pattern 60 has the same shape as the first direction ridge pattern 50, but is arranged by rotating the first direction ridge pattern 50 by 90 degrees. The main ridge region 64 and the bridge region 68 of the second direction ridge pattern 60 correspond to the main ridge region 54 and the bridge region 58 of the first direction ridge pattern 50, respectively. The main ridges 62A and 62B, the end ridge 62C, the short connection ridge 62D, and the long connection ridge 62E of the second direction ridge pattern 60 are the main ridges 52A and 52B, the end ridge 52C, and the short connection ridge of the first direction ridge pattern 50. 52D and the long connecting ridge 52E. The bridges 66A, 66B, 66C, 66D and the end ridges 66E, 66F of the second direction ridge pattern 60 correspond to the bridges 56A, 56B, 56C, 56D and the end ridges 56E, 56F of the first direction ridge pattern 50. doing. The main ridges 62A and 62B and the bridges 66A, 66B, 66C, and 66D extend in a second direction Y2 that is slightly inclined with respect to the tire radial direction R. The groove part 63A, groove part 63B, groove part 63C, groove part 63D, and groove part 63E of the second direction ridge pattern 60 correspond to the groove part 53A, groove part 53B, groove part 53C, groove part 53D, and groove part 53E of the first direction ridge pattern 50.

  The first direction ridge pattern 50 and the second direction ridge pattern 60 are alternately arranged on the bottom surface 48A of the decorative recess 48, and the entire decorative recess 48 is formed by the first direction ridge pattern 50 and the second direction ridge pattern 60. It is decorated. The short connection ridge 52D and the long connection ridge 62E, and the long connection ridge 52E and the short connection ridge 62D of the adjacent first direction ridge pattern 50 and second direction ridge pattern 60 are connected to each other. As a result, the ridges having heights H3 and H4 are connected together from one end to the other end of the decorative recess 48 to form a zigzag continuous main ridge line 51. The continuous main ridge line 51 extends in a direction intersecting the tire circumferential direction.

Further, the sub-bridges 56A and 56B and the sub-bridges 66A and 66B of the adjacent first direction ridge pattern 50 and second direction ridge pattern 60 are adjacent to each other at an angle of 90 degrees to form a zigzag-shaped zigzag bridge line 61. doing. The zigzag bridge line 61 extends in the same direction as the continuous main ridge line 51.

The continuous main ridge line 51 and the zigzag bridge line 61 are alternately arranged in the tire circumferential direction.

  As described above, the side decoration band 46 has the first ridge pattern 50 including the main ridge region 54 and the bridge region 58, and the second direction including the main ridge region 64 and the bridge region 68, which have different ridge protrusion heights. The ridge pattern 60 is formed by alternately arranging ridge extending directions. As a result, the incident light can be reflected in multiple directions, and the side decoration band 16 can be seen in three dimensions, and shadows due to differences in the reflection of light (sunlight, ambient light, etc.) can be seen in the tire side portion. The difference can be effectively produced. Furthermore, since the main ridge regions 54 and 64 and the bridge regions 58 and 68 have different intervals between the ridges, the three-dimensional effect of the side decoration band 16 can be more effectively produced by the visual effect due to the density of the ridges. it can.

  The side decoration band 46 has a zigzag continuous main ridge line 51 composed of main ridge regions 54 and 64 and a zigzag zigzag bridge line 61 composed of support bridge regions 58 and 68. . Therefore, incident light can be effectively reflected in more directions, and a difference in shadow due to a difference in light reflection can be effectively produced in the tire side portion.

  The continuous main ridge line 51 is connected to one end from the one end to the other end of the decorative recess 48. When processing the mold for forming the main ridges 52A, 52B, 62A, 62B, if the main ridges 52A, 52B, 62A, 62B are interrupted for each ridge pattern, Need to move up and down. In the present embodiment, main ridges 52A, 52B, 62A, and 62B are connected to form a main ridge line 51 that continues from one end to the other end of the decorative recess. Therefore, the above-described vertical movement of the blade becomes unnecessary, and the groove for the main ridge can be easily processed.

In the side decorative strip 46, the continuous main ridge line 51 and the zigzag bridge line 61 extend in a direction intersecting the tire circumferential direction U. Therefore, propagation of cracks that are likely to occur along the tire circumferential direction U can be suppressed. Furthermore, since the continuous main ridge line 51 and the zigzag bridge line 61 are alternately arranged in the tire circumferential direction, the portion can be more effectively viewed three-dimensionally using the height difference.

  In the first direction ridge pattern 50 and the second direction ridge pattern 60, the groove width between adjacent ridges is gradually narrowed from the main ridges 52A and 62A side toward the subbridges 56D and 66D side. As a result, the ridge height in each of the main ridge regions 54 and 64 and the bridge regions 58 and 68 can be produced.

  In the present embodiment, the groove widths of the groove portions 53A to 53E formed between the main ridge 52A to the subbridge 56D and the main ridge 62A to the subbridge 66D are changed, but the groove widths M10 to M18 are shown in FIG. As shown, the groove widths of the groove portions 53A and 53B in the main ridge regions 54 and 64 may be the same width M19, and the groove widths of the groove portions 53D and 53E in the bridge regions 58 and 68 may be the same width M20. In this case, the groove widths M19 of the groove portions 53A and 53B in the main ridge regions 54 and 64 are made wider than the groove widths M20 of the groove portions 53C to 53E in the bridge regions 58 and 68.

  Further, in the present embodiment, in the first direction ridge pattern 50 and the second direction ridge pattern 50, the protrusion height of the ridge is two steps, but from the main ridge 22A, 62A side to the subbridge 56D, 66C side. The protrusion height may be gradually lowered.

  Further, the groove widths M10 to M18 may all be the same width M22 as shown in FIG. 10B.

DESCRIPTION OF SYMBOLS 10 Pneumatic tire 12 Tire side part 18 Decoration recessed part 18A Bottom face 20 1st direction ridge pattern 21 Continuous main ridge line 22A-22D Main ridge 23A-23D Groove part 24 Main ridge area | region (high ridge area | region)
26A-26D Surbridge 27A-27C Groove 28 Subbridge area (low ridge area)
30 Second direction ridge pattern 31 Continuous bridge line 32A to 32D Main ridge 33A to 33D Groove 34 Main ridge region (high ridge region)
36A to 36D Main ridge 38 Subbridge region (low ridge region)
40 Pneumatic tire 46 Side decoration band 48 Decoration recess 48A Bottom surface 50 First direction ridge pattern 51 Continuous main ridge line 52A, 53B Main ridge (main ridge)
53A to 53E Groove 54 Main ridge region (high ridge region)
56A-56D Subbridge (Subridge)
58 Surbridge area (low ridge area)
60 Second direction ridge pattern 61 Continuous bridge line 62A to 62B Main ridge 63A to 63E Groove 64 Main ridge region (high ridge region)
66A to 66D Surbridge 68 Subridge area (low ridge area)
R Tire radial direction U Tire circumferential direction X1 First direction Y1 Second direction X2 First direction Y2 Second direction

Claims (9)

A decorative recess formed on the outer surface of the tire side portion;
A high ridge region having a plurality of main ridges arranged in parallel so as to protrude from the bottom surface of the decorative recess and the extending direction is the first direction, and the extending direction protruding from the bottom surface of the decorative recess is the first direction. A first ridge pattern including a plurality of sub-bridges arranged in parallel so as to be in a direction and having a plurality of sub-bridges protruding from the bottom surface lower than the main ridge,
The high ridge region in which the extension direction of the main ridge is a second direction different from the first direction, and the low ridge region in which the extension direction of the subbridge is the second direction different from the first direction; A second direction ridge pattern including:
With
A plurality of the first direction ridge pattern and the second direction ridge pattern are arranged so as to be alternately arranged in the decorative recess,
Pneumatic tire.   2. The first direction ridge pattern and the second direction ridge pattern are arranged in the decorative recess so that the high ridge region and the low ridge region each extend in a zigzag shape. Pneumatic tires.   The pneumatic tire according to claim 2, wherein the zigzag shape extends in a direction intersecting the tire circumferential direction.   The pneumatic tire according to any one of claims 1 to 3, wherein the high ridge region and the low ridge region are alternately arranged in the tire circumferential direction.   The pneumatic tire according to any one of claims 1 to 4, wherein a ridge interval between the adjacent main ridges is wider than a ridge interval between the sub-bridges.   The ridge interval between the adjacent main ridges and the ridge interval between the sub-bridges are narrowed from the side far from the low ridge region of the high ridge region toward the side far from the high ridge region of the low ridge region. The pneumatic tire according to any one of claims 1 to 5, wherein:   The pneumatic tire according to any one of claims 1 to 6, wherein the main ridge and the bridge are zigzag-shaped.   The main ridge is connected to the main ridge in the high ridge region and in the adjacent high ridge region to form a continuous main ridge line that continues from one end to the other end of the decorative recess. The pneumatic tire according to claim 7.   The protruding height of the main ridge from the bottom surface gradually decreases from the side of the high ridge region far from the low ridge region toward the side of the low ridge region far from the high ridge region. The pneumatic tire according to any one of claims 1 to 8.