Tire

Abstract

To provide a tire in which air resistance is reduced and damage is prevented, the tire including a decorative part with improved visibility and design property.SOLUTION: A plurality of protrusions (10) are formed in a tire outer surface (3a) in a tire width direction outside from ground contact ends (14, 14) of a tread surface (12). On each of at least two side surfaces (S2, S3) continuous from the tire outer surface in surfaces (S1 to S5) of the protrusions, at least one recess (P2) is formed and a decorative part is formed by the recess.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a tire having a decorative portion that reduces air resistance, prevents trauma, and further enhances visibility and design.

Background Art

[0002] A tire is disclosed in which a logo consisting of predetermined characters, symbols or figures is disposed on the outer surface of the sidewall portion of the tire (see Patent Document 1). In the tire disclosed in Patent Document 1, when the logo is bordered by raised ridges and a logo inner ridge is provided in the surrounding area of the raised ridges to accentuate the difference between the logo and the background, the logo is disposed so as to protrude either radially outward or inward from a position overlapping the decorative band.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Since the logo described in Patent Document 1 is formed on the ridge of the decorative band, it protrudes considerably from the outer surface of the tire. For this reason, it is liable to receive air resistance and there is a risk of damage when the tire comes into contact with a curb.

[0005] In recent years, the logos formed on the outer surface of tires have also become more complex, and it is desired to improve the visibility and design of the logos, such as the logo being different depending on the viewing direction or the logo changing when the tire rolls.

[0006] Therefore, an object of the present invention is to provide a tire having a decorative portion that not only reduces air resistance and prevents trauma but also enhances visibility and design.

Means for Solving the Problem

[0007] The tire according to the present invention has a plurality of convex portions formed on the outer surface of the tire on the outer side in the tire width direction from each ground contact end of the tread surface, and at least one concave portion is formed on each of at least two side surfaces of the surface of the convex portion that is continuous with the outer surface of the tire, and a decorative portion is constituted by the concave portion.

Effect of the Invention

[0008] According to the present invention, the decorative portion is configured as a concave portion formed on the side surface of the convex portion. For this reason, although the decorative portion is located on the outer side in the tire width direction rather than the outer surface of the tire, it is located on the inner side in the tire width direction (or the inner side in the tire diameter direction) rather than the surface of the convex portion that is farthest from the outer surface of the tire. Therefore, since the decorative portion does not protrude from the outer surface of the tire beyond the convex portion of the tire, a tire with low air resistance can be provided. Further, due to such a positional relationship between the outer surface of the tire and the decorative portion, even when the convex portion comes into contact with a curb, a tire in which the decorative portion is hardly damaged can be provided. Furthermore, since the decorative portion is constituted by the concave portions formed on at least two side surfaces, a tire having a plurality of decorative portions and having enhanced visibility and design can be provided.

Brief Description of the Drawings

[0009]

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Mode for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that these embodiments do not limit the present invention. Further, the constituent elements of the above embodiments include those that can be replaced and are easy for those skilled in the art, or those that are substantially the same. Furthermore, various forms included in the above embodiments can be arbitrarily combined within the scope obvious to those skilled in the art.

[0011] In the following description, the tire radial direction refers to the direction orthogonal to the tire rotation axis. The inner side in the tire radial direction refers to the side facing the tire rotation axis in the tire radial direction, and the outer side in the tire radial direction refers to the side away from the tire rotation axis in the tire radial direction. Further, the tire circumferential direction refers to the circumferential direction centered on the tire rotation axis. Furthermore, the tire width direction refers to the direction parallel to the tire rotation axis. The inner side in the tire width direction refers to the side facing the tire equatorial plane (tire equator line) in the tire width direction, and the outer side in the tire width direction refers to the side away from the tire equatorial plane in the tire width direction. Note that the tire equatorial plane refers to a plane that is orthogonal to the tire rotation axis and passes through the center of the tire width of the tire.

[0012] Similarly, in the following description, the standard rim refers to the "applicable rim" defined by JATMA, the "Design Rim" defined by TRA, or the "Measuring Rim" defined by ETRTO.

[0013] Similarly, in the following description, the normal internal pressure refers to the "maximum air pressure" defined by JATMA, the maximum value described in "TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES" defined by TRA, or "INFLATION PRESSURES" defined by ETRTO. The normal load refers to the "maximum load capacity" defined by JATMA, the maximum value described in "TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES" defined by TRA, or "LOAD CAPACITY" defined by ETRTO.

[0014] (1) Example of tire structure (when the convex portion is a ridge) An example of the tire structure of the present embodiment will be described below.

[0015] FIG. 1 is a perspective view showing the overall configuration of the tire of the present embodiment, and FIG. 2 is an enlarged view of the convex portion group formed on the outer surface of the tire shown in FIG. 1. The tire 1 includes a tire body 3 and a convex portion group 5 composed of a plurality of convex portions 10 formed on the outer surface 3a of the tire in the outer side in the tire width direction from each grounding end 14, 14 of the tread surface 12 of the tire body 3. Note that the tire 1 is not limited to a pneumatic tire, and may be a so-called solid tire that does not require filling with a gas such as air. Further, when the tire 1 is a pneumatic tire in FIG. 1, it shows a non-loaded state in which it is mounted on a normal rim and a normal internal pressure is applied.

[0016] As shown in FIG. 1, a convex portion group 5 composed of a plurality of convex portions 10 is formed on the outer surface 3a of the tire in the outer side in the tire width direction from the grounding end 14 of the tread surface 12 of the tire 1. Here, the region of the outer surface 3a of the tire where the convex portion 10 may be formed is not limited to the shoulder portion, the sidewall portion, and the bead portion, and also includes the tread portion (however, only the region on the outer side in the tire width direction from the grounding end).

[0017] Note that the examples shown in FIGS. 1 and 2 are examples in which the convex portion 10 of the present embodiment is a ridge. Here, the ridge refers to a convex portion among the convex portions that has an elongated shape in a plan view (the state of FIG. 2) of the convex portion group 5 such that the longitudinal direction can be confirmed. In this specification, in FIG. 2, a convex portion in which the dimension in the longitudinal direction (extending direction) is twice or more the dimension in the lateral direction (width direction) of the convex portion 10 is referred to as a ridge.

[0018] As shown in FIG. 1, on the outer surface 3a of the tire 1, a plurality of convex portions 10 arranged in parallel in the tire circumferential direction are formed at intervals in the central portion of the sidewall portion in the tire radial direction.

[0019] Also, each of the convex portions 10 shown in FIG. 1 projects from the outer surface 3a of the tire 1 toward the substantially outer side in the tire width direction, and the protruding direction gradually changes from the outer end to the inner end in the tire radial direction according to the shape change of the outer surface 3a of the tire, which is the formation base of the convex portion.

[0020] Here, the protruding direction of the convex portion 10 refers to the direction connecting the center of gravity of the boundary surface between the convex portion 10a (10) shown in FIGS. 1 and 2 and the outer surface 3a of the tire, and the point (or the center of gravity of the surface including the point) having the maximum distance from the outer surface 3a of the tire. Also, each of the convex portions 10 shown in FIG. 1 does not necessarily have the same size and shape.

[0021] Hereinafter, among the plurality of convex portions 10 (ten convex portions from 10a to 10c in the figure), the convex portion 10a will be described. The convex portion 10a has four side surfaces continuous from the outer surface 3a of the tire (in the figure shown, three side surfaces S1 to S3 and a side surface S4 located on the back side of the side surface S1 and not visible from the direction of the side surface S1). Here, the side surface S1 shown in FIG. 2 is the surface visible from the outer side in the tire width direction (or the inner side in the tire radial direction), the side surface S2 is the surface visible from the left side in the tire circumferential direction, S3 is the surface visible from the right side in the tire circumferential direction, and the side surface S4 is the surface visible from the outer side in the tire radial direction.

[0022] In addition, the convex portion 10a shown in FIG. 2 is continuous from each of the side surfaces S1 to S4, and further includes an outer surface S5 including a position where the distance from the outer surface 3a of the tire is the maximum. The outer surface S5 is a surface visible from the outer side in the tire radial direction.

[0023] FIG. 3 is a cross-sectional view taken along line III-III of the convex portion 10a shown in FIG. 2. As shown in FIG. 3, the convex portion 10a has a trapezoidal shape, and the side surface S3 on the right side in the tire circumferential direction includes a flat portion P1 where no concave portion is formed and a concave portion P2 formed at the innermost portion in the tire radial direction.

[0024] Similarly, for the convex portions other than the convex portion 10a, the side surface S3 also includes a flat portion and a concave portion. When the ten convex portions are combined (i.e., connected together) and viewed from the right side in FIG. 2, the alphabet letter "A" as shown in FIG. 4 is represented.

[0025] On the other hand, the side surface S2 on the left side in the tire circumferential direction of the ten convex portions 10 shown in FIG. 2 includes at least a flat portion, and a concave portion is formed in some of the convex portions. As a result, when the ten convex portions are combined (i.e., connected together) and viewed from the left side in FIG. 2 for the side surface S3, the alphabet letter "y" as shown in FIG. 5 is represented.

[0026] Thus, the characters formed by the concave portions formed on the side surfaces S2 and S3 shown in FIGS. 2 and 3 respectively form decorative portions, and the plurality of decorative portions formed on each of the convex portions shown in FIG. 2 are combined to represent, as a whole, for example, certification markings of various countries, brand logos such as manufacturer brands or product brands, designs, trademarks or patterns (hereinafter, these may be collectively referred to as "patterns, etc.").

[0027] In the examples shown in FIGS. 2 and 3, among the side surfaces S1 to S4, the decorative portions are formed on S2 and S3. However, the present embodiment is not limited to such examples. That is, the present embodiment includes any example in which the decorative portions are provided on at least two of the side surfaces S1 to S4. In contrast, in this example, no decorative portion is provided on the outer surface S5.

[0028] Also, usually, when the vehicle with the tire mounted is stationary, the position of the human eye is often above the tire in the vertical direction. Therefore, it is desirable to provide the decorative portions on the side surfaces S2 to S4 that are more likely to come into the field of view among the side surfaces S1 to S4. In this example, it is more preferable to provide the decorative portions on the side surfaces S2 and S3 with a large area.

[0029] According to the tire 1 of the present embodiment described above, the decorative portions shown in FIGS. 2 and 3 are configured as the concave portions P2 formed on the side surfaces S2 and S3 of the convex portion 10. Therefore, although the decorative portions are located outside the tire outer surface 3a in the tire width direction, they are located inside the tire width direction from the point on the convex portion 10 that is farthest from the tire outer surface 3a or the surface including the point (in this example, the outer surface S5 shown in FIGS. 2 and 3). Therefore, in FIGS. 2 and 3, since the decorative portions formed by the respective concave portions P2 do not protrude from the tire outer surface 3a beyond the convex portion 10, it is possible to provide the tire 1 with less air resistance.

[0030] Also, due to the above-described positional relationship between the tire outer surface 3a and the decorative portions shown in FIGS. 2 and 3, even when the tire 1 comes into contact with a curb, the first contact with the curb is the outer surface S5 and not the side surfaces S2 and S3. Therefore, it is possible to provide the tire 1 in which the decorative portions are less likely to be damaged, and thus the durability performance of the tire 1 can be improved.

[0031] Furthermore, since different patterns or the like can be formed on the side surfaces S2 and S3 of the convex portion 10 shown in FIGS. 2 and 3, different patterns or the like can be provided depending on the viewing direction, and the visibility and designability of the appearance of the tire 1 can be improved.

[0032] In such a tire 1, the distance L between adjacent convex portions 10, 10 shown in Fig. 2 is preferably 0.5 mm or more and 5.0 mm or less. Here, the distance L means the shortest distance between adjacent convex portions 10, 10 as shown in Fig. 2. By setting the distance L to 0.5 mm or more, the air resistance during tire rolling can be further reduced because the air flow between the convex portions 10, 10 during tire rolling is made closer to a laminar flow state.

[0033] On the other hand, by setting the distance L to 5.0 mm or less, a sufficient number of convex portions 10 can be formed on the limited outer surface 3a of the tire. When a plurality of decorative portions provided on the convex portions 10 are combined, the amount of information can be further increased, and thus the visibility and design of the tire can be further enhanced. More preferably, the distance L is 0.8 mm or more and 4.7 mm or less, and most preferably 1.1 mm or more and 4.4 mm or less.

[0034] Also, the height H (the maximum dimension in the protruding direction of the above-described convex portion) of the convex portion 10a from the outer surface 3a of the tire shown in Fig. 3 is preferably 0.3 mm or more and 5.0 mm or less. By setting the height H to 0.3 mm or more, the size of the decorative portion that can be formed on the side surfaces S2, S3 described above can be sufficiently ensured, and the visibility of patterns and the like expressed by combining the respective convex portions can be further enhanced. On the other hand, by setting the height H to 5.0 mm or less, the air resistance during tire rolling can be further reduced without excessively increasing the protruding amount of the convex portion 10a from the outer surface 3a of the tire. More preferably, the height H is 0.6 mm or more and 4.7 mm or less, and most preferably 0.9 mm or more and 4.4 mm or less.

[0035] Furthermore, the depth from the side surface S3 of the recess P2 shown in FIGS. 2 and 3 (the maximum dimension measured in the direction perpendicular to each side surface assuming that the recess is not formed) is preferably 0.05 mm or less for each. By setting the above depth to 0.05 mm or less, it is possible to suppress the generation of turbulent flow of the air that has entered each recess during tire rolling, and thus it is possible to further reduce the air resistance during tire rolling. The above depth is more preferably 0.04 mm or less, and extremely preferably 0.03 mm or less.

[0036] In addition, the width of the recess P2 shown in FIGS. 2 and 3 (the dimension of the recess measured in the longitudinal direction of the ridge shown in FIG. 2) is preferably 25 mm or less. By setting the above dimension to 25 mm or less, it is possible to increase the rigidity of the convex portion 10a without excessively increasing the amount of the recess P2 formed in the convex portion 10a. Thereby, even when the convex portion 10a comes into contact with a curb, it is possible to suppress the peeling off of the convex portion 10a from the tire body 3, and thus further improve the tire durability performance. The above dimension is more preferably 20 mm or less, and extremely preferably 15 mm or less.

[0037] The recess P2 constituting the decorative portion shown in FIGS. 2 and 3 can be formed by embossing or laser processing. Further, after the formation of the recess P2, for example, by applying printing to the surface of the recess P2 using a paint such as ink, the decorative portion can be made more prominent.

[0038] When using a paint, it is preferable to use a fluorescent paint. Thereby, the visibility of the decorative portion can be improved even in a dark place such as a night road. Also, by using a normal paint and a fluorescent paint in combination, it is possible to partially change the appearance of the decorative portion between day and night. Thereby, the visibility of the decorative portion can be further refined and improved. Furthermore, machining using a vulcanizing mold or the like may be performed on the convex portion 10, and laser processing may be performed on the details of the convex portion 10. Thereby, it is also possible to improve the design quality by the cooperation of the efficiency of machining and the precision of laser processing.

[0039] (2) Tire structure modification example (when the convex part is a block) The following describes a modification example of the tire structure of the present embodiment.

[0040] (2-1) When the block is in the shape of a truncated square pyramid Fig. 6A is a diagram showing a modification example of the convex part group shown in Fig. 2, and Fig. 6B is a diagram showing one side surface of the convex part included in the convex part group shown in Fig. 6A. As shown in Fig. 6A, the convex part group 5 is composed of 99 truncated square pyramid-shaped blocks. Here, a block refers to a convex part among the convex parts that has a shape close to a square in a plan view (the state of Fig. 6A) such that the longitudinal direction cannot be confirmed. In this specification, in Fig. 6A, a convex part whose longitudinal dimension is less than twice the lateral dimension of the convex part 10 is referred to as a block.

[0041] Taking the leftmost upper block 10y in Fig. 6A among these 99 blocks for explanation, the block 10y shown in the figure has side surfaces S11 to S14 and outer surface S15 corresponding to side surfaces S1 to S4 and outer surface S5 described in Fig. 2. Also, as shown in Fig. 6B, the block 10y has a side surface S11 corresponding to the isosceles trapezoid-shaped side surface S1 described in Fig. 3.

[0042] In the examples shown in Fig. 6A and Fig. 6B, the same or different decorative parts can be provided on at least two of the side surfaces S11 to S14. Note that the remaining 98 blocks can also be provided with decorative parts in the same manner.

[0043] Based on such a decorative mode of each block, by combining all the decorative parts of the 99 blocks, patterns and the like can be expressed. Specifically, by providing decorative parts on the lower, left, right, and upper side surfaces of the block 10y in Fig. 6A, when the entire convex part group 5 is viewed from each of the above sides, the same or different patterns and the like can be visually recognized respectively.

[0044] In this way, since the decorative portions can be provided on a plurality of side surfaces of one block, the surface space of the convex portion (block 10y) can be efficiently used, and thus the visibility and design property of the tire can be enhanced.

[0045] (2-2) When the block is in the shape of a square pyramid FIG. 7A is a view showing another modification example of the convex portion group shown in FIG. 2, and FIG. 7B is a view showing one side surface of the convex portion included in the convex portion group shown in FIG. 7A. As shown in FIGS. 7A and 7B, the convex portion group 5 is composed of 88 square pyramid-shaped blocks.

[0046] Taking the leftmost upper block 10z in FIG. 7A out of these 88 blocks for explanation, the block 10z has side surfaces S16 to S19 corresponding to the side surfaces S1 to S4 described in FIG. 2, but does not have an outer surface as shown in FIG. 2. Further, as shown in FIG. 7B, the block 10z has an isosceles triangle side surface S16, which is different from the trapezoidal side surface S1 described in FIG. 3.

[0047] In the example shown in FIGS. 7A and 7B, the same or different decorative portions can be provided on at least two surfaces of the side surfaces S16 to S19. Note that the remaining 87 blocks can also be provided with decorative portions in the same manner.

[0048] Based on such a decorative mode of each block, patterns and the like can be expressed by combining all the decorative portions of the 88 blocks. Specifically, by providing decorative portions on the lower, left, right, and upper side surfaces of the block 10z in FIG. 7A, when the entire convex portion group 5 is viewed from each of the above sides, the same or different patterns and the like can be visually recognized respectively.

[0049] In this way, since the decorative portions can be provided on a plurality of side surfaces of one block, the surface space of the convex portion (block 10z) can be efficiently used, and thus the visibility and design property of the tire can be enhanced.

[0050] Note that the square pyramid-shaped block 10z shown in FIG. 7A has no outer surface as compared with the frustum of a square pyramid-shaped block 10y shown in FIG. 6A. Therefore, in the example shown in FIG. 7A, since a relatively large amount of space is formed between the blocks, the air resistance can be further reduced.

[0051] (3) Examples of tire usage Examples of the usage of the tire of the present embodiment are shown below. (3-1) Examples where the type of pattern or the like changes FIGS. 8A to 10B show an example in which a convex portion group 5 composed of 99 frustum of a square pyramid-shaped blocks is formed on the outer surface 3a of the tire 1. FIGS. 8A, 9A, and 10A are side views of the tire showing the convex portion group of the present embodiment in the first position, the second position, and the third position, respectively. FIGS. 8B, 9B, and 10B are diagrams for explaining which side surfaces of the plurality of convex portions are visible in the tires shown in FIGS. 8A, 9A, and 10A, respectively.

[0052] Normally, when the tire 1 is mounted on a vehicle, the human eye is located vertically above the tire 1. Therefore, when the convex portion is a square as shown in FIG. 8B and the areas of the four side surfaces S11 to S14 are substantially equal, the upper side surfaces of the frustum of a square pyramid-shaped blocks 10y shown in FIGS. 8B, 9B, and 10B are easily visible to humans in any of the cases where the convex portion group 5 is in the first position (FIG. 8A), the second position (FIG. 9A), and the third position (FIG. 10A).

[0053] Assume that when the convex portion group 5 is in the first position (FIG. 8A), the positions of the side surfaces S11 to S14 of the block 10y are the positions shown in FIG. 8B. In this case, at the first position, when a human looks down on the tire 1 from vertically above, the side surface S14 will be mainly visible.

[0054] Next, when the tire rolls and the convex portion group 5 moves from the first position (FIG. 8A) to the second position (FIG. 9A), since a person looks down on the tire 1 from directly above in the vertical direction, the side surface S12 will be mainly visible. When the tire further rolls and the convex portion group 5 moves from the second position (FIG. 9A) to the third position (FIG. 10A), since a person looks down on the tire 1 from directly above in the vertical direction, the side surface S11 will be mainly visible.

[0055] In this way, as the tire 1 rolls, the side surfaces of the block 10y that come into a person's eyes change, so that the person will sequentially visually recognize the decorative portions formed on each side surface. The same applies to the other 98 blocks other than the block 10y. Therefore, the decorative portions of all 99 blocks are combined (i.e., the blocks are joined together). For example, when the convex portion group 5 is in the first position, a tire manufacturer's logo can be made visible; when the convex portion group 5 is in the second position, a tire type logo can be made visible; and when the convex portion group 5 is in the third position, a design concept of the tire type can be made visible. Predetermined decorative portions can be provided on each side surface. As a result, the visibility and design property of the tire can be significantly improved as compared with the prior art.

[0056] (3-2) Example in which the size of a pattern or the like changes FIGS. 11A to 13B show an example in which a convex portion group 5 composed of 99 quadrangular frustum-shaped blocks is formed on the outer surface 3a of the tire 1. FIGS. 11A, 12A, and 13A are tire side views showing the cases where the convex portion group of the present embodiment is in the first position, the second position, and the third position, respectively. FIGS. 11B, 12B, and 13B are diagrams for explaining which side surfaces of a plurality of convex portions are visible in the tires shown in FIGS. 11A, 12A, and 13A, respectively.

[0057] Note that, in this example, unlike the example shown in FIGS. 8A to 10B, a pattern or the like composed of an aggregate of decorative portions visible in the first position, a pattern or the like composed of an aggregate of decorative portions visible in the second position, and a pattern or the like composed of an aggregate of decorative portions visible in the third position are different in size from each other.

[0058] That is, in FIG. 11B, the surface of block 10y that enters the human eye is mainly the side surface S14. Further, the blocks having a decorative portion formed on the side surface S14 are only the 35 blocks included inside the region α surrounded by the dotted line in the figure.

[0059] Next, when the tire rolls and the convex portion group 5 moves from the first position (FIG. 11A) to the second position (FIG. 12A), a human will mainly visually recognize the side surface S12 (FIG. 12B). Further, the blocks having a decorative portion formed on the side surface S12 are 63 blocks included inside the region β surrounded by the dotted line in the figure, and the number of side surfaces visible in FIG. 12B is larger than the number of side surfaces visible at the first position. As a result, the aggregate of the decorative portions formed on the side surfaces of the blocks becomes larger than the aggregate at the first position.

[0060] When the tire further rolls and the convex portion group 5 moves from the second position (FIG. 12A) to the third position (FIG. 13A), a human will mainly visually recognize the side surface S11. Further, the blocks having a decorative portion formed on the side surface S11 are 99 blocks included inside the region γ surrounded by the dotted line in the figure, and the number of side surfaces visible in FIG. 13B is even larger than the number of side surfaces visible at the second position. As a result, the aggregate of the decorative portions formed on the side surfaces of the blocks becomes even larger than the aggregate at the second position.

[0061] As the tire 1 rolls in this way, the region of the decorative portion formed on the side surface of the block 10y that enters the human eye changes, so that the size of the pattern or the like as the aggregate of the decorative portions changes. In this example, for example, in any of the cases where the convex portion group 5 is in the first to third positions, the logo of the tire manufacturer can be visually recognized, and the size of this logo can be changed to enhance the observer's attention over time. As a result, the visibility and designability of the tire can be significantly improved as compared with the conventional ones.

[0062] The present invention includes the following aspects.

[0063] (1) A tire in which a plurality of convex portions are formed on the outer surface of the tire on the outer side in the tire width direction from each grounding end of the tread surface, and at least one concave portion is formed on at least two side surfaces of the surface of the convex portion that are continuous with the outer surface of the tire, and a decorative portion is constituted by the concave portion. A tire characterized by this.

[0064] (2) The tire according to (1), wherein the surface of the convex portion further includes an outer surface that is continuous from the side surface and includes a position where the height from the outer surface of the tire is maximum.

[0065] (3) The height of the convex portion from the outer surface of the tire is 0.3 mm or more and 5.0 mm or less, the distance between the convex portions is 0.5 mm or more and 5.0 mm or less, the depth of the concave portion from the side surface is 0.05 mm or less, and the dimension of the concave portion in a direction perpendicular to both the height direction of the convex portion and the depth direction of the concave portion is 0.05 mm or less. The tire according to (1) or (2).

[0066] (4) The decorative portion is composed of a logo, and different logos are formed on the first side surface and the second side surface where the concave portion is formed, respectively. The tire according to any one of (1) to (3).

[0067] (5) The tire according to (4), wherein the first logo formed on the first side surface and the second logo formed on the second side surface have different decorative areas.

[0068] (6) The convex portion has four side surfaces. The tire according to any one of (1) to (5).

[0069] (7) The convex portion has a frustum of a square pyramid shape. The tire according to any one of (1) to (6).

[0070] (8) The convex portion has a square pyramid shape. The tire according to any one of (1) to (7).

Explanation of Reference Numerals

[0071] 1 Tire 3 Tire body 3a Tire outer surface 5 Group of convex portions 10 Convex portion 10a, 10b, 10c Convex portion (ridge) 10y, 10z Block 12 Tread surface 14 Ground contact end H Height L Distance P1 Flat portion P2 Concave portion S1, S2, S3, S4, S11, S12, S13, S14 Side surface S5, S15 Outer surface α, β, γ Region

Claims

1. A tire in which a plurality of convex portions are formed on the outer surface of the tire on the outer side in the tire width direction from each grounding end of the tread surface, wherein at least one concave portion is formed on at least two side surfaces continuous from the outer surface of the tire among the surfaces of the convex portion, and a decorative portion is constituted by the concave portion.

2. The surface of the convex portion further includes an outer surface that is continuous from the side surface and includes a position having the maximum height from the outer surface of the tire. The tire according to claim 1.

3. The height of the convex portion from the outer surface of the tire is 0.3 mm or more and 5.0 mm or less, the distance between the convex portions is 0.5 mm or more and 5.0 mm or less, the depth of the concave portion from the side surface is 0.05 mm or less, the width of the concave portion is 0.05 mm or less. The tire according to claim 1.

4. The decorative portion is composed of a logo, and different logos are formed on the first side surface and the second side surface where the concave portion is formed, respectively. The tire according to claim 1.

5. The first logo formed on the first side surface and the second logo formed on the second side surface have different decorative areas. The tire according to claim 4.

6. The convex portion includes four of the side surfaces. The tire according to claim 1.

7. The convex portion has a frustum of a square pyramid shape. The tire according to claim 6.

8. The convex portion has a square pyramid shape. The tire according to claim 6.

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