JP2017001439A - tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tire capable of enhancing uniformity of appearance of a pattern part and improving visibility, when a viewing angle is changed in a pattern area of an outer surface of the tire.SOLUTION: The tire is configured so that: in a pattern area 20, wavy protrusions 24 which protrude from a base part 22 by protrusion height of 0.1 mm or longer and 1.0 mm or shorter, extend in a first direction, have an amplitude in a second direction being orthogonal to the first direction in plan view, and are arranged in the second direction with intervals, and linear protrusions 34 which extend in a linear state in the first direction, and are arranged between the wavy protrusions 24 are formed. An arrangement pitch P between the wavy protrusion 24 and the linear protrusion 34 arranged alternately, is 0.1 mm or longer and 1.0 mm or shorter.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a tire having a pattern formed on an outer surface.

  Conventionally, forming a fine projection on a side portion of a tire to form a pattern having a smooth tire surface and contrast. For example, Patent Literature 1 discloses a technique for obtaining a marking exhibiting a large contrast on the surface of the same color by forming a plurality of protrusions distributed over the entire pattern.

International Publication No. 2012/131089

  The pattern having the above contrast exhibits a contrast with the surroundings that reflect the light by controlling the reflection of the light. However, in Patent Document 1, since the protrusion has anisotropy, the pattern portion may not be seen uniformly when the viewing angle is changed. Further ingenuity is required for the irregularities formed in the pattern in order to improve the visibility by controlling the reflection of light.

  In consideration of the above facts, the present invention provides a tire in which visibility is improved by improving the uniformity of the appearance of the pattern portion when the viewing angle is changed in the pattern area on the outer surface of the tire. Is an issue.

  The tire according to claim 1 is formed on the outer surface of the tire, has a pattern region having a base portion, and is formed in the pattern region, and has a protruding height of 0.1 mm or more and 1.0 mm or less from the base portion, A plurality of wavy projections extending in the first direction and having an amplitude in a second direction orthogonal to the first direction and arranged in the second direction in a plan view; A projection height of 0 mm or less, linearly extending in the first direction, and arranged between the wavy projections, and the arrangement pitch of the wavy projections and the linear projections alternately arranged is , 0.1 mm or more and 1.0 mm or less.

  A pattern region having a base portion is formed on the outer surface of the tire of the present invention. Here, the outer surface of the tire refers to a surface that is visible from the outside of the tire, such as a tire side portion, a tread portion, a tread groove bottom, and a groove wall. The tire of the present invention includes both pneumatic tires and non-pneumatic tires.

  A plurality of wavy projections are arranged in the pattern region. The wavy projection has a protruding height of 0.1 mm or more and 1.0 mm or less from the base portion, and extends in the first direction in a plan view and has an amplitude in a second direction orthogonal to the first direction. Between these wavy projections, a linear projection having a projection height of 0.1 mm or more and 1.0 mm or less from the base portion and extending linearly in the first direction is disposed. And the arrangement pitch of the wavy projection and the linear projection arranged alternately is set to 0.1 mm or more and 1.0 mm or less.

  By alternately arranging the wave-like protrusions and the linear protrusions on the base portion, the light incident on the pattern region is suppressed from being reflected, and a contrast with the outside of the pattern region can be obtained. In addition, since the wavy projection has an amplitude in the second direction in plan view, the reflection direction of the light can be made different from that having no amplitude, and the concentration of reflected light is suppressed. The Thereby, the uniformity of the appearance of a pattern area | region at the time of changing a viewing angle can be improved, and the visibility of a tire outer surface can be improved.

  Further, linear protrusions are arranged between the wavy protrusions. Compared with the wavy protrusion, the linear protrusion is less likely to cause air accumulation when a tire is manufactured using a mold, and has good moldability and improved visibility.

  In the tire according to claim 2, the wavy protrusion has a sinusoidal shape in plan view.

  Thus, the wavy protrusion becomes a continuous curve by making the wavy protrusion into a sinusoidal shape in plan view. Therefore, the direction of the reflected light can be dispersed, the uniformity of the appearance of the pattern region when the viewing angle is changed can be further improved, and the visibility of the outer surface of the tire can be improved.

  In the tire according to claim 3, the wavy protrusion is formed from one end to the other end in the first direction in the pattern region.

  In this way, by forming a wavy protrusion from one end to the other end of the pattern region, when manufacturing a tire using a mold, it is possible to reduce the occurrence of air accumulation in the wavy protrusion and to improve the moldability. Can do. Further, reflection of incident light is suppressed from one end to the other end of the pattern area where the wavy projection is formed, and a contrast with the outside of the pattern area can be obtained.

  In the tire according to claim 4, the adjacent wavy projections have the same phase.

  Thus, by setting the wavy projections to the same phase, the interval between the wavy projections can be narrowed and the arrangement of the wavy projections can be made dense. Thereby, reflection of the light incident on the pattern region can be further suppressed, and contrast with the outside of the pattern region can be obtained to improve visibility.

  In the tire according to claim 5, the wavy protrusion and the linear protrusion have a distance between the side wall surfaces on both sides becoming longer from the top side toward the base portion when viewed in the cross section in the second direction.

  Thus, by forming the wavy protrusions and the side wall surfaces of the linear protrusions, the distance between the wavy protrusions on the top side can be widened, and light can be incident between the wavy protrusions in a wide range. And since the light which entered between the wavy protrusion and the linear protrusion is reflected by the inclined side wall surface, it can suppress that reflected light returns outside between the extension parts. Further, the wavy protrusion and the linear protrusion are stably suppressed from falling down, and the durability can be improved.

  According to the present invention, in the pattern region on the outer surface of the tire, the visibility can be improved by improving the uniformity of the appearance of the pattern portion when the viewing angle is changed.

1 is a side view of a tire according to a first embodiment. It is a part of pattern area | region of the tire which concerns on 1st Embodiment. (A) is sectional drawing of the AA line of FIG. 2, (B) is sectional drawing of the modification of (A). It is a partial enlarged view of the mark part of the tire concerning a 1st embodiment. It is sectional drawing (A)-(C) of the part corresponding to FIG. 3 (A) of the tire which concerns on the modification of 1st Embodiment. It is a part of pattern area | region of the tire which concerns on 2nd Embodiment. It is a partial perspective sectional view of the tread of the tire concerning a 3rd embodiment. It is Table 1 which shows the result of a test example.

[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 tire 10 according to this embodiment. In the present embodiment, the tire circumferential direction is indicated by C, and the tire radial direction is indicated by R.

  A mark portion 14 is formed on the tire side portion 12 of the 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. A pattern area 20 and a character area 16 are arranged in the mark portion 14. The character area 16 is displayed with characters “ABCDEFGH” displayed on a smooth surface, for example. In the mark portion 14 </ b> A on the upper side of FIG. 1, the pattern region 20 is a part of the mark portion 14 </ b> A other than the character region 16 and is a kind of decorative band, and is formed so as to surround the character region 16. On the other hand, in the mark portion 14B on the lower side of the paper surface of FIG. 1, the pattern region 20 is the same region as the character region 16 of the mark portion 14B, and the portion other than the character region 16 of the mark portion 14B is the tire side portion. The outer surface other than the twelve mark portions 14 is the same. In the present embodiment, the mark portion 14A will be described. In addition, the mark part 14 containing the pattern area | region 20 can be formed by providing the unevenness | corrugation in a tire mold by laser processing. Moreover, it is preferable that the pattern area | region 20 is arrange | positioned on the outer side of the tire radial direction R rather than the tire maximum width part (maximum part of the linear distance between tire side parts).

  As shown in FIG. 2, the pattern region 20 has a base portion 22. The base portion 22 forms a bottom surface in the pattern region 20, and wave-like protrusions 24 and linear protrusions 34 project from the base portion 22.

  The wave-like protrusion 24 has a sinusoidal shape extending in the tire radial direction R as the first direction and having an amplitude in the tire circumferential direction C as the second direction in a plan view of the pattern region 20. In the wavy protrusion 24, a plurality of wavy protrusions 24 having the same shape (having the same amplitude and the same wavelength) are arranged at the same phase and spaced in the tire circumferential direction C. Hereinafter, the amplitude of the wavy projection 24 is assumed to be the amplitude y and the wavelength is assumed to be the wavelength λ. The amplitude y of the wavy protrusion 24 is the length from the center in the amplitude direction (tire circumferential direction C) (indicated by a one-dot chain line in the figure) to the center portion of the width of the wavy protrusion 24 in the maximum amplitude portion in plan view To do.

  The wavelength λ is preferably 1 to 20 times the amplitude y. When the wavelength λ exceeds 20 times the amplitude y, the change in the reflection direction of the light incident on the wavy projection 24 is reduced, and the uniformity of the appearance of the pattern portion when the viewing angle is changed is improved. Get smaller. When the wavelength λ is less than 1 time with respect to the amplitude y, the radius of curvature is small, and the wavy protrusion 24 is likely to be chipped during manufacturing. Therefore, the wavelength λ is preferably in the range of 1 to 20 times the amplitude y. The wavelength λ is more preferably 2 to 10 times the amplitude y.

  The linear protrusion 34 is disposed between the adjacent wavy protrusions 24. The linear protrusion 34 extends linearly in the tire radial direction R in the plan view of the pattern region 20.

  Each of the wavy protrusions 24 and the linear protrusions 34 extends from one end of the pattern region 20 in the tire radial direction R to the other end. In plan view, the first convex portion 25A is a convex portion on one side of the wavy protrusion 24 in the tire circumferential direction C (upper side of the paper surface), and the convex portion is on the other side of the tire circumferential direction C (lower side of the paper surface). This is referred to as two convex portions 25B.

  The wavy protrusions 24 and the linear protrusions 34 are alternately arranged from one end of the pattern region 20 in the tire circumferential direction C to the other end. Therefore, the wavy protrusion 24 and the linear protrusion 34 are formed over the entire pattern region 20. The arrangement pitch P in the tire circumferential direction C of the wavy projections 24 and the linear projections 34 that are alternately arranged is set to 0.1 mm or more and 1.0 mm or less. The arrangement pitch P is a distance between the amplitude direction center of the adjacent wave-like protrusions 24 and the amplitude direction center of the linear protrusion 34. When the arrangement pitch P is less than 0.1 mm, the interval between the wave-like protrusions 24 and the linear protrusions 34 becomes short, and it is difficult to ensure the moldability during manufacturing. On the other hand, when the arrangement pitch P exceeds 1.0 mm, the wavy projections 24 and the linear projections 34 are not densely arranged, and the improvement in the visibility of the pattern region 20 is reduced by the reflected light from the base portion 22. . Therefore, the arrangement pitch P is set to 0.1 mm or more and 1.0 mm or less. The arrangement pitch P is more preferably set within a range of 0.2 mm or more and 0.8 mm or less, and further preferably 0.3 mm or more and 0.6 mm or less. The arrangement pitch P is preferably set to be shorter than twice the amplitude y.

  As shown in FIG. 3A, the cross section in the direction orthogonal to the tire radial direction R of the wavy projection 24 is a substantially isosceles triangle having a flat top. The height (hereinafter referred to as “protrusion height H”) from the base portion 22 to the protruding tip portion (hereinafter referred to as “top portion 26”) of the wavy protrusion 24 is set to 0.1 mm or more and 1.0 mm or less. The protrusion height H is more preferably set within the range of 0.2 mm or more and 0.8 mm or less, and further preferably 0.3 mm or more and 0.6 mm or less.

  The side wall surface 28 constituting the oblique side of the isosceles triangle of the wavy projection 24 has a distance S between the side wall surfaces 28 on both sides as viewed from the cross section in the direction orthogonal to the extending direction of the wavy projection 24 from the top 26 side. It is longer toward the base portion 22. The side wall surface 28 forms an angle θ with respect to a virtual vertical plane F with respect to the base portion 22. The angle θ is preferably in the range of 5 ° to 30 °, and more preferably in the range of 10 ° to 20 °. When the angle θ is larger than the angle 30 °, the ratio of the reflected light on the side wall surface 28 returning from between the adjacent wavy projections 24 to the outside increases, and the improvement in visibility decreases. That is, the light is reflected, the difference in contrast with the outside of the pattern region 20 is reduced, and the improvement in visibility is reduced. On the other hand, when the angle θ is smaller than 5 °, the wavy protrusion 24 is likely to fall down. Therefore, the angle θ is 5 ° to 30 ° in consideration of the effect of suppressing the reflected light of the light incident between the wavy projections 24 from returning from between the wavy projections 24 and the durability of the wavy projections 24. It is preferable that

  Further, in the wavy protrusion 24, the protrusion height H is preferably 0.8 to 6 times the base length B of the isosceles triangle (the distance between the base portions 24B of the side wall surface 28 in the base portion 22). . When the protruding height H is smaller than 0.8 times the base length B, the ratio of the reflected light on the side wall surface 28 returning from between the wave-like projections 24 to the outside increases, and the visibility is reduced. That is, the light is reflected, the difference in contrast with the outside of the pattern region 20 is reduced, and the improvement in visibility is reduced. On the other hand, if the protruding height H is larger than 6 times the base length B, the side wall surface 28 is at an angle close to the vertical with respect to the base portion 22, so that the wavy protrusion 24 is likely to fall down. Therefore, in consideration of the effect of suppressing the reflected light of light incident between the wavy projections 24 from returning between the wavy projections 24 and the durability of the wavy projections 24, the protrusion height H is the bottom length. It is preferably 0.8 to 6 times the thickness B.

  The cross section in the direction orthogonal to the extending direction of the linear protrusion 34 (tire radial direction R) is the same shape as the cross section of the corrugated protrusion 24 in the same direction. In FIG. 3A, the portions of the linear protrusions 34 corresponding to the top 26, the side wall surface 28, and the base 24B of the wave-like protrusion 24 are indicated by the top 36, the side wall 38, and the base 34B, respectively.

  The base portion 22 between the adjacent wavy protrusions 24 and the linear protrusions 34 may be flat as shown in FIG. 3A or as shown in FIG. 3B. Alternatively, it may be curved. By making the base portion 22 a curved surface, reflection of incident light is suppressed, contrast with the outside of the pattern region 20 is increased, and visibility is improved.

  Next, the function and effect of the tire according to this embodiment will be described.

  In the pattern region 20 of the tire side portion 12 as described above, the light incident on the pattern region 20 hits the side wall surface 28 of the wave-like protrusion 24 and the side wall surface 38 of the linear protrusion 34, and the adjacent side wall surface 28 and side wall surface. Attenuating while repeating reflection between 38. Thereby, the light reflected to the outside of the pattern area 20 is reduced, and as shown in FIG. 4, the pattern area 20 looks black, and the other areas (the character area 16 and the other tire side portions 12) are relatively Looks white. Therefore, the contrast between the pattern region 20 and other regions can be obtained. As in the present embodiment, the contrast between the pattern region 20 and the character region 16 surrounded by the pattern region 20 increases, so that the character region 16 can be clearly seen and visibility can be improved.

  Further, since the wavy protrusion 24 of the present embodiment has an amplitude in the tire circumferential direction C, the light reflection direction can be made different from that of a linear protrusion having no amplitude, Concentration of light is suppressed. Thereby, the uniformity of the appearance of a pattern area | region at the time of changing a viewing angle can be improved, and the visibility of a tire outer surface can be improved.

  Moreover, since the wavy protrusion 24 of the present embodiment has a sinusoidal shape in plan view, it is a continuous curve. As a result, the light reflection direction can be dispersed, the uniformity of the appearance of the pattern region when the viewing angle is changed can be further increased, and the visibility of the tire outer surface can be improved.

  Further, each of the wavy protrusions 24 and the linear protrusions 34 extends from one end of the pattern region 20 in the tire radial direction R to the other end, so that when the tire 10 is manufactured using a mold, Air can escape to the outside of the pattern region 20 from the end portions of the wave-like protrusions 24 and the linear protrusions 34 during the vulcanization. Thereby, generation | occurrence | production of the bear by the air pool in the pattern area | region 20 can be suppressed, and a moldability improves.

  Moreover, since the linear protrusion 34 is linear, compared to the wavy protrusion, when a tire is manufactured using a mold, air accumulation is less likely to occur, the moldability is good, and the protrusion is present, thereby improving visibility.

  In the present embodiment, the cross section in the direction orthogonal to the extending direction of the wavy protrusion 24 and the linear protrusion 34 (tire radial direction R) is substantially isosceles triangular, and the side wall surfaces 28 and 38 extend. The distance S between the side wall surfaces on both sides increases from the top portions 26 and 36 toward the base portion 22 when viewed in a cross section orthogonal to the protruding direction. Therefore, the distance between the apex portion 26 and the apex portion 36 of the adjacent corrugated protrusion 24 and the linear protrusion 34 is wider than the distance on the base portion 22 side, and light is incident between the corrugated protrusion 24 and the linear protrusion 34 in a wide range. be able to. The light incident between the wavy protrusion 24 and the linear protrusion 34 is repeatedly reflected between the adjacent side wall surfaces 28 and 38, so that the reflected light returns from between the wavy protrusion 24 and the linear protrusion 34 to the outside. This can be suppressed.

  Further, by making the cross section in the direction orthogonal to the extending direction of the wave-like protrusions 24 and the linear protrusions 34 as described above, it becomes easy to remove the mold at the time of manufacture, and the moldability can be improved. As a result, the wavy protrusions 24 are less collapsed, and the durability can be improved.

  In the present embodiment, the wave-like protrusions 24 have the same wavelength, amplitude, and phase. However, the wave-like protrusions 24 having different wavelengths, amplitudes, and phases may be arranged. In this embodiment, since the wavelength, amplitude, and phase of the adjacent wave-like protrusions 24 are the same, the arrangement pitch P of the wave-like protrusions 24 and the linear protrusions 34 is constant, and the wave-like protrusions 24 are densely arranged in the pattern region 20. can do. Thereby, reflection of the light incident on the pattern region 20 can be further suppressed, and contrast with the outside of the pattern region 20 can be obtained to improve visibility.

  In this embodiment, the cross section in the direction orthogonal to the extending direction of each of the wave-like protrusions 24 and the linear protrusions 34 is substantially isosceles triangular, but other shapes, for example, as shown in FIG. Thus, the vicinity of the top portions 26 and 36 may be curved to form the top portions 26R and 36R. By using the curved top portions 26R and 36R, the light reflection direction at the top portions 26R and 36R can be dispersed, and when the viewing angle is changed, the uniformity of the appearance of the pattern region 20 is improved. The visibility of the tire outer surface can be improved.

  Further, as shown in FIG. 5B, the wave-like protrusions 24 and the linear protrusions 34 may have a semi-elliptical shape having the tops 26D and 36D. With such a cross-sectional shape, the side wall surfaces 28D and 38D have a curved shape, and the reflected light can be dispersed to improve visibility.

  Further, as shown in FIG. 5C, the wavy protrusion 24 and the linear protrusion 34 can be formed into an isosceles triangle shape having a sharp apex 26T36T. By using a sharp isosceles triangle, since the top of the flat shape is eliminated, reflection can be suppressed and visibility can be improved.

  Further, in the present embodiment, the wave-like protrusions 24 have a sine wave shape, but may have other amplitude shapes such as a rectangular wave shape, a triangular wave shape, a sawtooth wave shape, and a trapezoidal wave shape. Furthermore, a rectangular wave shape, a triangular wave shape, a sawtooth wave shape, a trapezoidal wave shape, or the like may be mixed.

  Further, in the present embodiment, the extending direction of the wavy protrusion 24 is the tire radial direction R, but the tire circumferential direction C may be the extending direction of the wavy protrusion 24, or another direction, for example, the tire radial direction R. The direction in which the wavy projection 24 extends may be a direction inclined with respect to the angle. In the present embodiment, since the extending direction of the wavy protrusion 24 is the tire radial direction R, the wavy protrusion 24 can suppress the propagation of cracks in the tire circumferential direction C.

[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, wave straight line mixing protrusions 40 are formed so as to protrude from the base portion 22 of the pattern region 20 of the present embodiment. The wave straight line mixing protrusion 40 is formed by alternately arranging the wavy protrusions 24 and the linear protrusions 34 of the first embodiment in the tire radial direction R (extending direction). In the present embodiment, a portion corresponding to the wavy protrusion 24 is referred to as a wavy portion 42, and a portion corresponding to the straight protrusion 34 is referred to as a straight portion 44. The wavy portion 42 is composed of a first convex portion 25A and a second convex portion 25B for three periods. The straight line portion 44 is configured by a straight line corresponding to the extended length corresponding to the wavy portion 42.

  The adjacent wave straight line mixing protrusions 40 are arranged such that the corrugated part 42 and the straight line part 44 overlap in the tire radial direction R. Accordingly, in the tire circumferential direction C, the straight portions 44 are disposed between the wavy portions 42 of the alternate wave straight line mixing protrusions 40, and the wavy portions are disposed between the straight portions 44 of the alternate wave straight line mixing protrusions 40. 42 is arranged.

  The wave straight line mixing projection 40 is arranged from one end to the other end in the tire circumferential direction C of the pattern region 20. Therefore, the wave line mixing projection 40 is formed over the entire pattern region 20. The arrangement pitch P in the tire circumferential direction C of the wave linear mixing protrusions 40 is set to 0.1 mm or more and 1.0 mm or less.

  In the pattern region 20 of the present embodiment, since one wave / line mixing protrusion 40 has the waved portion 42 and the straight portion 44, there is an advantageous effect that a balance between formability and visibility can be secured. Can do.

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

  The tire 10 of the present embodiment is different from the first and second embodiments in that the pattern region 20 is formed on the tread 30, and the configuration of the pattern region 20 is the same as that of the first and second embodiments. .

  As shown in FIG. 7, the tire 10 includes a tread 30 on the outer side in the tire radial direction. A plurality of circumferential grooves 32 are formed in the tread 30. A mark portion 14 having a character area 16 and a pattern area 20 is formed on the groove bottom 32 </ b> A of one circumferential groove 32. The pattern region 20 can be formed in the same configuration as in the first to fourth embodiments.

  In the present embodiment, the contrast between the character region 16 of the mark portion 14 formed on the groove bottom 32A of the tread 30 and the pattern region 20 can be increased, and the visibility of the tread 30 can be improved.

  Note that the tire 10 of the first to third embodiments may be a pneumatic tire or a non-pneumatic tire.

<Test example>
In order to prove the effect of the present invention, tires of Examples 1 to 7 to which the present invention was applied and tires of Comparative Examples 1 to 4 were prepared, and the following tests were performed.

(Test conditions)
As the test tires, tires having a size of 205 / 55R16 and a tire cross-section height SH of 114 mm were used.

  The tires of Examples 1 to 7 and Comparative Examples 1 to 4 are tires having the same structure as the tire according to the first embodiment of the present invention, and the wavy protrusions 24 formed in the pattern region 20 of the mark portion 14A, As shown in Table 1 of FIG. 8, the arrangement pitch P, the protrusion height H, and the angle θ of the linear protrusions 34 are different.

(Test 1)
In Test 1, the visibility when the pattern region was viewed from each direction was evaluated. First, each test tire was assembled on an applied rim, and then 20 observers observed and conducted a questionnaire survey to see if the pattern area appeared blacker than a normal tire. The results are shown in Table 1 as “visibility”. In Table 1, when the number of viewers who answered that the pattern area looked blacker than a normal tire was 18 or more, A, when 10 to 17 people were B, and when 9 or less people were evaluated as C did. Table 1 also shows the number of viewers who answered that the pattern portion looked black.

(Test 2)
In Test 2, the moldability of the protrusions constituting the pattern portion was evaluated.

  ○ is produced when the wavy projections 24 and linear projections 34 are less than 0.1% falling, and the falling rate is 0.1% or more and less than 0.3%. Those having an occurrence rate of 0.3% or more are shown in Table 1 as x.

  As shown in Table 1, it can be seen that the tires of Examples 1 to 7 to which the present invention is applied are improved in both visibility and moldability as compared with the tires of Comparative Examples 1 to 4.

10 tires, 20 pattern areas, 22 base parts, 24 wave-like protrusions 26 top parts, 28 side wall surfaces, 40 wave straight line mixed protrusions (wave-like protrusions, linear protrusions)
42 Wavy parts (Wavy protrusions), 44 Straight parts (Linear protrusions)
P arrangement pitch, C tire circumferential direction (second direction)
R tire radial direction (first direction), H protrusion height, λ wavelength, y amplitude

Claims (5)

A pattern region formed on the outer surface of the tire and having a base portion;
Formed in the pattern region, having a projection height of 0.1 mm or more and 1.0 mm or less from the base portion, and extends in a first direction and has an amplitude in a second direction orthogonal to the first direction in plan view. A plurality of wavy projections arranged in the second direction;
A protrusion height of 0.1 mm or more and 1.0 mm or less from the base portion, linearly extending in the first direction, and disposed between the wavy protrusions;
Have
The tire has an arrangement pitch of the wavy projections and the linear projections alternately arranged in a range from 0.1 mm to 1.0 mm.   The tire according to claim 1, wherein the wavy protrusion has a sinusoidal shape in plan view.   The tire according to claim 1, wherein the wavy protrusion is formed from one end to the other end in the first direction in the pattern region.   The tire according to any one of claims 1 to 3, wherein the adjacent wavy protrusions have the same phase. The distance between the side wall surfaces on both sides of the corrugated protrusion and the linear protrusion increases from the top side toward the base portion as viewed in the cross section in the second direction. The tire according to item 1.