Pneumatic tires

Abstract

The present invention provides a pneumatic tire. The sidewall portion of the pneumatic tire has a logo and a plurality of sidewall blocks. The plurality of sidewall blocks are respectively arranged to be spaced apart in the tire circumferential direction via grooves extending in the tire radial direction. The logo protrudes further outward in the tire axial direction than the outer surface around the logo, i.e., the reference plane. The plurality of sidewall blocks respectively have a high protrusion. The protrusion amount of the high protrusion relative to the reference plane is greater than the maximum protrusion amount of the logo relative to the reference plane. The plurality of sidewall blocks include: a first sidewall block that overlaps with the logo when viewed in the tire radial direction, and a second sidewall block that does not overlap with the logo when viewed in the tire radial direction. The inner end of the high protrusion of the first sidewall block in the tire radial direction is separated from the logo in the tire radial direction, and a part of the high protrusion of the second sidewall block overlaps with the logo when viewed in the tire circumferential direction.

Description

Technical Field

[0001] The present invention relates to a pneumatic tire. Background Art

[0002] Sometimes the sidewall of a pneumatic tire has: a protective protrusion for protecting the tire, and a logo indicating a product name or brand name, etc. The logo is a protrusion that protrudes from the surrounding contour surface (hereinafter sometimes referred to as the reference surface) toward the outside of the tire axial direction. For example, the sidewall of the pneumatic tire of Patent Document 1 has: a protective rib that extends continuously around the entire circumference of the tire as a protective protrusion, and a logo. In the specification of U.S. Patent No. 8733414, a recess is formed at the inner end of the protective rib in the tire radial direction, and a part of the logo is arranged in the recess, and the recess of the protective rib is separated from the logo.

[0003] The sidewall portion is configured to include a plurality of sidewall blocks spaced apart in the tire circumferential direction across the groove, replacing the protective rib described in Patent Document 1. In the configuration of the sidewall portion having a plurality of sidewall blocks, it is required to balance the visibility of the logo and the cut resistance performance provided by the sidewall blocks. Summary of the invention

[0004] The present invention provides a pneumatic tire capable of achieving both visibility of a logo and cut resistance performance brought about by a sidewall pattern block.

[0005] The pneumatic tire of the present invention comprises a sidewall portion extending in the radial direction of the tire, the sidewall portion having: a mark and a plurality of sidewall pattern blocks protruding toward the outside in the axial direction of the tire, the plurality of sidewall pattern blocks are respectively arranged to be spaced apart in the circumferential direction of the tire via a groove extending in the radial direction of the tire, the mark protruding toward the outside in the axial direction of the tire more than the outer surface around the mark, that is, a reference plane, the plurality of sidewall pattern blocks respectively have a high protrusion, the protrusion amount of the high protrusion relative to the reference plane is: greater than the maximum protrusion amount of the mark relative to the reference plane, the plurality of sidewall pattern blocks include: a first sidewall pattern block overlapping with the mark when viewed in the radial direction of the tire, and a second sidewall pattern block not overlapping with the mark when viewed in the radial direction of the tire, the inner end of the high protrusion of the first sidewall pattern block is separated from the mark in the radial direction of the tire, and a part of the high protrusion of the second sidewall pattern block overlaps with the mark when viewed in the circumferential direction of the tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is a side view of a part of the sidewall portion of the pneumatic tire according to the first embodiment of the present invention, viewed from a line of sight parallel to the tire axial direction.

[0007] Figure 2It is a cross-sectional perspective view showing a part of the tread portion and the sidewall portion according to the first embodiment.

[0008] Figure 3 yes Figure 1 Cross-sectional view of the A1-A1 area.

[0009] Figure 4 yes Figure 1 Cross-sectional view of the A2-A2 area.

[0010] Figure 5 yes Figure 1 Cross-sectional view of the A3-A3 area.

[0011] Figure 6 This is a side view of a part of the sidewall portion of the tire PT according to the second embodiment, viewed from a line of sight parallel to the tire axial direction.

[0012] Figure 7 yes Figure 6 Cross-sectional view of the A4-A4 area.

[0013] Figure 8 It is a side view showing a part of the sidewall portion of the tire PT according to the third embodiment when viewed from a line of sight parallel to the tire axial direction.

[0014] Fig. 9 yes Figure 8 Cross-sectional view of the A5-A5 area.

[0015] Fig.10 It is a side view showing a part of the sidewall portion of the tire PT according to the fourth embodiment when viewed from a line of sight parallel to the tire axial direction.

[0016] Fig.11 yes Fig.10 Cross-sectional view of the A6-A6 area.

[0017] Description of Reference Numerals

[0018] 12…sidewall portion; 12b…position of maximum tire width; 12c…reference plane; 2…annular protrusion; 3…mark; 4…sidewall block; 40…first sidewall block; 40a…high protrusion of the first sidewall block; 40b…inner end of the high protrusion of the first sidewall block in the tire radial direction; 40c…low protrusion of the first sidewall block; 41…second sidewall block; 41a…high protrusion of the second sidewall block; 41b…inner end of the high protrusion of the second sidewall block in the tire radial direction; 5…groove; AD…axial direction of the tire; CD…circumferential direction of the tire; RD…radial direction of the tire. DETAILED DESCRIPTION

[0019] [First embodiment]

[0020] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

[0021] Figure 1 It is a side view of a part of the sidewall portion of the pneumatic tire PT (hereinafter simply referred to as “tire PT”) according to the first embodiment, viewed from a line of sight parallel to the tire axial direction. Figure 2 It is a cross-sectional perspective view showing a part of the tread portion and the sidewall portion according to the first embodiment. Figure 3 yes Figure 1 Cross-sectional view of the A1-A1 area (cross-sectional view of the tire meridian). Figure 4 yes Figure 1 Cross-sectional view of the A2-A2 area (cross-sectional view of the tire meridian). Figure 5 yes Figure 1 Cross-sectional view of the A3-A3 area (cross-sectional view of the tire meridian). Figure 3 It shows only one side of the tire axial direction AD from the tire equatorial plane TE.

[0022] <Basic structure>

[0023] like Figures 1 to 3 As shown, the pneumatic tire PT has: a pair of bead portions 11, a sidewall portion 12 extending from each bead portion 11 toward the outside of the tire radial direction RD, and a tread portion 13 connected to the outer ends of the pair of sidewall portions 12 in the tire radial direction RD and having a tread surface 13a in contact with the ground on the outside of the tire radial direction RD.

[0024] The so-called tire equatorial plane TE is a plane that is orthogonal to the tire rotation axis and is located at the center of the tire axial direction AD. The so-called tire meridian plane is a plane that includes the tire rotation axis and is orthogonal to the tire equatorial plane TE. In the tire axial direction AD, the so-called inner side is the side that is close to the tire equatorial plane TE, and the so-called outer side is the side that is away from the tire equatorial plane TE. In addition, in the tire radial direction RD, the so-called inner side is the side that is close to the tire rotation axis, and the so-called outer side is the side that is away from the tire rotation axis.

[0025] The bead portion 11 includes: a bead core 11a formed in an annular shape, and a bead outer rubber 11b arranged on the outer side of the bead core 11a in the tire radial direction RD. For example, the bead core 11a is formed by laminating rubber-coated bead wires (for example, metal wires). The bead outer rubber 11b is composed of a hard rubber having a higher rubber hardness than other rubber components adjacent to the bead outer rubber 11b, and its cross-sectional shape is formed to be tapered toward the outer side of the tire radial direction RD.

[0026] The tire PT also includes a carcass portion 14 spanned between a pair of bead cores 11a, and an inner liner 15 disposed on the inner side of the carcass portion 14 in the tire radial direction RD and facing the inner space of the tire PT filled with air. The carcass portion 14 and the inner liner 15 are disposed along the inner circumference of the tire within the bead portion 11, the sidewall portion 12, and the tread portion 13.

[0027] The bead portion 11 includes a rim rubber 11c disposed on the outer side of the carcass portion 14 in the tire axial direction AD. The rim rubber 11c forms an outer surface that contacts the rim. The sidewall portion 12 includes a sidewall rubber 12a disposed on the outer side of the carcass portion 14 in the tire axial direction AD. The sidewall rubber 12a forms an outer surface.

[0028] The tread portion 13 includes a tread rubber 13b forming a tread surface 13a, and a belt layer (not shown) disposed between the tread rubber 13b and the carcass portion 14. The belt layer includes a plurality of (e.g., four) belt cords (not shown). The belt cords (not shown) include a plurality of belt cords (e.g., organic fibers or metals) arranged in parallel, and an upper layer of rubber covering the belt cords.

[0029] The carcass portion 14 is composed of at least one carcass ply (not shown). The carcass ply (not shown) is folded around the bead core 11a in such a manner that the bead core 11a is wound therein. In addition, the carcass ply (not shown) includes: a plurality of ply cords (e.g., organic fibers or metals) arranged in a direction substantially orthogonal to the tire circumferential direction CD, and an upper layer of rubber covering the ply cords. In addition, Figure 3 In FIG. 1 , although the carcass portion 14 is omitted by a single-dot chain line, it actually has thickness.

[0030] The inner liner 15 has an excellent function of preventing gas from penetrating in order to maintain air pressure. In addition, in the sidewall portion 12, as in the first embodiment, it is possible to configure such that no other member is interposed between the inner liner 15 and the carcass portion 14.

[0031] The sidewall portion 12 has, on its outer surface, a position 12b which is the same as the position of the maximum tire width in the tire radial direction RD (specifically, the position where the distance W1 between the outer sides of the carcass portion 14 in the tire axial direction AD is the maximum). Hereinafter, this position 12b is referred to as the tire maximum width position 12b.

[0032] Although not shown, the tread rubber 13b has a plurality of main grooves (not shown) extending continuously along the tire circumferential direction CD and a plurality of auxiliary grooves 13f extending to the outer end in the tire axial direction AD over the entire area of ​​the tread surface 13a in the tire circumferential direction CD.

[0033] <Sidewall Structure>

[0034] like Figures 1 to 3 As shown, the sidewall portion 12 has: a reference plane 12c, a mark 3 protruding from the reference plane 12c toward the outside of the tire axial direction AD, and a plurality of sidewall blocks 4. The mark 3 may also be located at the tire maximum width position 12b. The reference plane 12c is: the outer surface around the mark 3. The reference plane 12c is located at least on the inner side of the tire radial direction RD of the mark 3, and on both sides of the mark 3 in the tire circumferential direction CD. In the first embodiment, the reference plane 12c is located on the outer side and the inner side of the tire radial direction RD of the mark 3. The reference plane 12c is: a so-called contour surface arranged at a position that is rotationally symmetrical with the tire rotation axis as the center. A portion of the reference plane 12c extends continuously over the entire circumference of the tire circumferential direction CD. The reference plane 12c may also be composed of a plurality of arcs with different curvature radii on the cross section of the tire meridian plane. In addition, the protrusion amount in this specification is: the amount protruding in the normal direction of the reference plane 12c.

[0035] like Figure 1 As shown, the mark 3 indicates a plurality of characters, graphics, symbols or a combination thereof when viewed in a line of sight parallel to the tire axial direction AD. The characters may include letters and numbers. The mark 3 indicates a brand name, a product name or a company name. As in the first embodiment, the size of the tire radial direction RD of the mark 3 may also be greater than 13 mm. If it is less than 13 mm, the visibility of the mark 3 will deteriorate. The size of the tire radial direction RD of the mark 3 may be less than 30 mm as long as it is greater than 13 mm, or may be less than 30% of the tire cross-sectional height R1.

[0036] The mark 3 of the first embodiment is a Latin letter, and the letter "O" and the letter "N" are arranged to be spaced apart in the tire circumferential direction CD. In the first embodiment, the protrusion amount of the mark 3 is constant, but it is not limited to this. For example, the mark 3 can be composed of multiple segments, and each segment has a different protrusion amount.

[0037] As in the first embodiment, the sidewall portion 12 may also include an annular protrusion 2 that protrudes in the tire axial direction AD and extends along the tire circumferential direction CD. The annular protrusion 2 is arranged outside the mark 3 in the tire radial direction RD. The annular protrusion 2 is separated from the mark 3. As in the first embodiment, the annular protrusion 2 may also extend continuously along the tire circumferential direction CD over the entire area of ​​the sidewall portion 12 in the tire circumferential direction CD.

[0038] like Figure 1 as well as Figure 2As shown, in addition to the annular protrusion 2, the plurality of sidewall blocks 4 are also interrupted by the groove 5 over the entire length of the tire radial direction RD. The plurality of sidewall blocks 4 are respectively arranged to be spaced apart in the tire circumferential direction CD across the groove 5 extending along the tire radial direction RD. In the first embodiment, the plurality of sidewall blocks 4 are arranged on both sides of the outer side and the inner side of the annular protrusion 2 in the tire radial direction RD. The plurality of sidewall blocks 4 include: a first sidewall block 40 overlapping with the mark 3 when viewed in the tire radial direction RD, and a second sidewall block 41 not overlapping with the mark 3 when viewed in the tire radial direction RD. According to the arrangement relationship of the mark 3, two first sidewall blocks 40 may be adjacent in the tire circumferential direction CD, two second sidewall blocks 41 may be adjacent in the tire circumferential direction CD, or one first sidewall block 40 and one second sidewall block 41 may be adjacent in the tire circumferential direction CD.

[0039] In addition, the mark 3 is not arranged in the groove 5 but is located on the inner side of the groove 5 in the tire radial direction RD.

[0040] like Figures 1 to 5 As shown, the plurality of sidewall blocks 4 each have a high protrusion. The first sidewall block 40 has a high protrusion 40a. The second sidewall block 41 has a high protrusion 41a. The protrusion amount D1 of the high protrusions 40a and 41a relative to the reference plane 12c is greater than the maximum protrusion amount D2 of the mark 3 relative to the reference plane 12c. That is, D1≥D2. Of course, the protrusion amount D1 of the high protrusions 40a and 41a relative to the reference plane 12c may also be greater than the maximum protrusion amount D2 of the mark 3 relative to the reference plane 12c. That is, D1>D2. In addition, the reference plane 12c, which serves as the reference for the protrusion amount D1 of the high protrusions 40a and 41a, is both a contour surface and a groove bottom surface of the groove 5. The protrusion amount of the mark 3 relative to the reference plane 12c may also be greater than 0.4 mm and less than 4 mm.

[0041] As described above, the sidewall blocks 4 exhibit cut resistance. It is desirable to improve the cut resistance. It is also desirable that the visibility of the mark 3 be good. However, when the sidewall portion 12 is narrow, the sidewall blocks 4 and the mark 3 restrict each other. For example, if the size of the tire radial RD of the sidewall blocks 4 is reduced, the size of the tire radial RD of the mark 3 can be increased. Therefore, although the visibility of the mark 3 is improved, the cut resistance on the reverse side is reduced. On the other hand, if the size of the tire radial RD of the mark 3 is reduced, the size of the tire radial RD of the sidewall blocks 4 can be increased. Therefore, although the cut resistance is improved, the visibility of the mark 3 on the reverse side is reduced. This problem is more significant on low-profile tires.

[0042] In order to balance the cut resistance and the visibility of the logo 3, Figure 1 , Figure 3 as well as Figure 4 As shown, the inner end 40b of the high protrusion 40a of the first sidewall block 40 in the tire radial direction RD is separated from the mark 3 in the tire radial direction RD. Accordingly, by separating the high protrusion 40a that hinders the visibility of the mark 3 from the mark 3 in the tire radial direction RD, the deterioration of visibility can be suppressed. In addition, the inner end 40b of the high protrusion 40a of the first sidewall block 40 in the tire radial direction RD is located at a position closer to the inner side of the tire radial direction RD than the annular protrusion 2. Accordingly, the cut damage resistance performance can be further ensured. In addition, a part of the high protrusion 41a of the second sidewall block 41 overlaps with the mark 3 when viewed in the tire circumferential direction CD. That is, the inner end 41b of the high protrusion 41a of the second sidewall block 41 in the tire radial direction RD is arranged at a position closer to the inner side of the tire radial direction RD than the outer end 3a of the mark 3 in the tire radial direction RD. Accordingly, since the size of the tire radial direction RD of the second sidewall block 41 can be increased, the cut damage resistance performance can be improved.

[0043] like Figure 5 As shown, the inner end 41b of the high protrusion 41a of the second sidewall pattern block 41 in the tire radial direction RD may also be located at a position within a range (Ar1) of 10% of the tire cross-sectional height R1 in the tire radial direction RD with the tire maximum width position 12b as the center. Figure 3 As shown, the tire cross-sectional height R1 is a length along the tire radial direction RD from the outermost end of the tread portion 13 in the tire radial direction RD to the inner end of the bead portion 11 in the tire radial direction RD.

[0044] like Figure 5 As shown in FIG. 1 , if the inner end 41b of the high protrusion 41a of the second sidewall block 41 in the tire radial direction RD is located at a position closer to the outside of the tire radial direction RD than the range Ar1, it will be difficult to obtain the protection effect provided by the second sidewall block 41, that is, the cut damage resistance performance. In addition, if the inner end 41b is located at a position closer to the inside of the tire radial direction RD than the range Ar1, the cut damage resistance performance provided by the second sidewall block 41 can be obtained. However, since the inner side of the tire radial direction RD closer to the range Ar1 is a range that is difficult to contact the ground, the second sidewall block 41 is arranged in an unnecessary area, which will cause an increase in weight. Accordingly, if it is within the range Ar1, it is possible to properly balance the guarantee of the cut damage resistance performance and the suppression of the weight increase.

[0045] [Second embodiment]

[0046] Next, a second embodiment will be described. Figure 6 This is a side view of a part of the sidewall portion of the tire PT according to the second embodiment, viewed from a line of sight parallel to the tire axial direction. Figure 7 yes Figure 6 Cross-sectional view of the A4-A4 area (cross-sectional view of the tire meridian). Figure 6 A3-A3 section diagram and Figure 5 Same. Figure 6 as well as Figure 7 As shown in FIG. 1 , the first sidewall block 40 of the second embodiment has a shorter dimension in the tire radial direction RD than the first embodiment. Figure 6 as well as Figure 7 As shown, the high protrusion 40a of the first sidewall block 40 of the second embodiment is only arranged at a position closer to the outside of the tire radial direction RD than the annular protrusion 2, and is not arranged at a position closer to the inside of the tire radial direction RD than the annular protrusion 2. The inner end 40b of the high protrusion 40a of the first sidewall block 40 in the tire radial direction RD forms a terminal at the annular protrusion 2. Accordingly, compared with the first embodiment, since the separation distance between the first sidewall block 40 and the mark 3 along the tire radial direction RD is larger, the visibility of the mark 3 can be improved. The protrusion amount of the high protrusion 40a of the first sidewall block 40 is the same as the protrusion amount D1 of the high protrusion 40a of the first sidewall block 40 of the first embodiment.

[0047] Other than that, it is the same as the first embodiment.

[0048] [Third embodiment]

[0049] Next, a third embodiment will be described. Figure 8 This is a side view of a part of the sidewall portion of the tire PT according to the third embodiment, viewed from a line of sight parallel to the tire axial direction. Fig. 9 yes Figure 8 Cross-sectional view of the A5-A5 area (cross-sectional view of the tire meridian). Figure 8 A3-A3 section diagram and Figure 5 Same. Figure 8 as well as Fig. 9 As shown, the first sidewall block 40 has a low protrusion 40c. The protrusion amount D3 of the low protrusion 40c of the first sidewall block 40 relative to the reference plane 12c is less than: the maximum protrusion amount D2 of the mark 3 relative to the reference plane 12c. That is, D1≥D2>D3. The low protrusion 40c of the first sidewall block 40 extends from the high protrusion 40a of the first sidewall block 40 toward the inner side of the tire radial direction RD and is connected to the mark 3. Although the protrusion amount of the low protrusion 40c of the third embodiment is constant, it may not be constant.

[0050] Accordingly, since the high protrusion 40a of the first tread block is separated from the logo 3 and there is no high protrusion 40a around the logo 3, the deterioration of the visibility of the logo 3 caused by the high protrusion 40a can be suppressed. In addition, by connecting the low protrusion 40c to the logo 3, the protection function and aesthetics brought by the high protrusion 40a and the low protrusion 40c of the first sidewall tread block 40 can be ensured. The shape of the low protrusion 40c in the line of sight along the tire axial direction AD is preferably the same as the shape of the second sidewall tread block 41. Thus, a unified aesthetics can be obtained.

[0051] [Fourth embodiment]

[0052] Next, a fourth embodiment will be described. Fig.10 This is a side view of a part of the sidewall portion of the tire PT according to the fourth embodiment, viewed from a line of sight parallel to the tire axial direction. Fig.11 yes Fig.10 Cross-sectional view of the A6-A6 area (cross-sectional view of the tire meridian). Fig.10 A3-A3 section diagram and Figure 5 Same. Fig.10 as well as Fig.11 As shown, the low protrusion 40c has a contour that protrudes from the reference plane 12c and is annular when viewed along the tire axial direction AD. The protrusion amount of the annular inner part of the contour relative to the reference plane 12c is less than the protrusion amount D3 of the contour. In the fourth embodiment, although the protrusion amount of the annular inner part of the contour relative to the reference plane 12c is 0 mm, it can also be greater than 0 mm and less than D3. The cross-sectional shape orthogonal to the extension direction of the contour can be a triangular protrusion composed of two straight lines, a protrusion with a rounded front end, or a trapezoidal shape with a flat front end.

[0053] According to this configuration, similarly to the third embodiment, the visibility of the logo 3 is not impaired, and the protection function and the appearance by the first side block 40 can be ensured.

[0054] The above-mentioned dimensional values, positional relationships, and size relationships are measured in a normal state without load, with the tire PT mounted on a normal rim and filled with a normal internal pressure. A normal rim is a rim that is determined for each tire in accordance with the specification in a specification system including the specification to which the tire is based. If it is JATMA, it is a "standard rim", and if it is TRA or ETRTO, it is a "measurement rim".

[0055] The normal internal pressure is: the air pressure determined for each tire according to each specification in the specification system including the specifications on which the tire is based. If it is JATMA, it is the maximum air pressure. If it is TRA, it is the maximum value recorded in the table "Tire load limit at various cold inflation pressures". If it is ETRTO, it is the "inflation pressure".

[0056] [Modifications]

[0057] (1) As in the first embodiment, the plurality of sidewall blocks 4 are arranged on both sides of the outer side and the inner side of the annular protrusion 2 in the tire radial direction RD, but the present invention is not limited thereto. For example, as in the second embodiment, the sidewall blocks 4 may be arranged only on the outer side of the annular protrusion 2 in the tire radial direction RD. Alternatively, the sidewall blocks 4 may be arranged only on the inner side of the annular protrusion 2 in the tire radial direction RD.

[0058] (2) In the first to fourth embodiments, the annular protrusion 2 is provided, but the annular protrusion 2 may be omitted. In the absence of the annular protrusion 2, the plurality of side blocks may be divided by the groove 5 over the entire length in the tire radial direction.

[0059] (3) In the first to fourth embodiments, the protrusion of the annular protrusion 2 and the protrusion of the side block 4 are the same and flush with each other, but the present invention is not limited thereto. For example, the protrusion of the annular protrusion 2 may be greater than that of the side block 4 .

[0060] (4) The second embodiment may be configured in combination with the third and fourth embodiments. That is, the first sidewall block 40 includes a high protrusion 40a and a low protrusion 40c, the inner end 40b of the high protrusion 40a of the first sidewall block 40 in the tire radial direction RD is terminated at the annular protrusion 2, and the low protrusion 40c of the first sidewall block 40 may extend from the high protrusion 40a (annular protrusion 2) toward the inner side in the tire radial direction RD and be connected to the mark 3.

[0061] As described above, as in the pneumatic tires of the first to fourth embodiments, the pneumatic tires may also be configured as follows: a sidewall portion 12 extending along the tire radial direction RD, the sidewall portion 12 having: a mark 3, and a plurality of sidewall pattern blocks 4 protruding outward in the tire axial direction AD, the plurality of sidewall pattern blocks 4 being respectively arranged to be spaced apart in the tire circumferential direction CD across a groove 5 extending along the tire radial direction RD, the mark 3 protruding outward in the tire axial direction AD more than the outer surface around the mark 3, i.e., the reference surface 12c, the plurality of sidewall pattern blocks 4 having high protrusions 40a, 41a, the high protrusions 40a, 41a The protrusion amount D1 relative to the reference plane 12c is: greater than the maximum protrusion amount D2 of the mark relative to the reference plane 12c, and the multiple sidewall pattern blocks 4 include: a first sidewall pattern block 40 overlapping with the mark 3 when observed in the tire radial direction RD, and a second sidewall pattern block 41 not overlapping with the mark when observed in the tire radial direction RD, an inner end 40b of the high protrusion 40a of the first sidewall pattern block 40 is separated from the mark 3 in the tire radial direction RD, and a part of the high protrusion 41a of the second sidewall pattern block 41 overlaps with the mark 3 when observed in the tire circumferential direction CD.

[0062] In this way, since the inner end 40b in the radial direction RD of the high protrusion 40a of the first sidewall pattern block 40 that overlaps with the mark 3 when viewed in the radial direction RD is separated from the mark 3 in the radial direction RD, the visibility of the mark 3 can be ensured. In addition, a part of the high protrusion 41a of the second sidewall pattern block 41 that does not overlap with the mark 3 when viewed in the radial direction RD can overlap with the mark 3 when viewed in the radial direction RD, and therefore the cut resistance performance can be ensured.

[0063] Therefore, both the visibility of the mark 3 and the cut resistance performance can be achieved.

[0064] As in the first, third and fourth embodiments, the sidewall portion 12 may also be constructed such that: the sidewall portion 12 has: an annular protrusion 2 extending continuously over the entire circumference of the tire in the circumferential direction CD; the inner end 40b of the high protrusion 40a of the first sidewall pattern block 40 in the tire radial direction RD is located at a position closer to the inside of the tire radial direction RD than the annular protrusion 2.

[0065] According to this configuration, visibility of the relatively large mark 3 can be ensured.

[0066] As in the second embodiment, the sidewall portion 12 may include the annular protrusion 2 extending continuously over the entire circumference in the tire circumferential direction CD, and the inner end 40 b of the high protrusion 40 a of the first sidewall block 40 in the tire radial direction RD may terminate at the annular protrusion 2 .

[0067] According to this configuration, it is possible to achieve both visibility of the logo 3 and the protective effect provided by the side blocks 4 .

[0068] As in the third and fourth embodiments, the structure may also be as follows: the first sidewall block 40 has a low protrusion 40c, the protrusion amount D3 of the low protrusion 40c relative to the reference plane 12c is smaller than the maximum protrusion amount D2 of the mark 3 relative to the reference plane 12c, and the low protrusion 40c extends from the high protrusion 40a of the first sidewall block 40 toward the inner side of the tire radial direction RD and is connected to the mark 3.

[0069] According to this configuration, it is possible to achieve both visibility of the logo 3 and a protective function provided by the side blocks 4 .

[0070] As in the fourth embodiment, the low protrusion 40c may have a contour that protrudes from the reference plane 12c and is annular when viewed in the tire axial direction AD, and the protrusion amount of the annular inner portion of the contour relative to the reference plane 12c is smaller than the protrusion amount D3 of the contour.

[0071] According to this configuration, the visibility of the logo 3 is not impaired, and the protective function and aesthetic appearance of the side blocks 4 can be ensured.

[0072] As in the first to fourth embodiments, the inner end 41b of the high protrusion 41a of the second sidewall block 41 in the tire radial direction RD may be located within a range (Ar1) of 10% of the tire cross-sectional height R1 in the tire radial direction RD centered on the tire maximum width position 12b.

[0073] According to this configuration, it is possible to ensure the cut resistance performance provided by the second side blocks 41 and to suppress an increase in weight.

[0074] As in the first to fourth embodiments, the dimension of the mark 3 in the tire radial direction RD may be 13 mm or more.

[0075] According to this configuration, the visibility of the mark 3 can be ensured.

[0076] Although the embodiments of the present invention are described above in conjunction with the accompanying drawings, it should be understood that the specific configuration is not limited to these embodiments. The scope of the present invention is not only indicated by the description of the above embodiments but also by the claims, and furthermore, includes all changes within the meaning and scope equivalent to the claims.

[0077] The structures adopted in the above-mentioned embodiments can also be adopted in other arbitrary embodiments. The specific structure of each part is not limited to the above-mentioned embodiment, and various modifications can be made within the scope not departing from the spirit of the present invention.

Claims

1. A pneumatic tire, characterized in that: The pneumatic tire includes a sidewall portion extending in the tire radial direction. The sidewall portion includes: a logo and a plurality of sidewall pattern blocks protruding toward the outside in the tire axial direction, The plurality of sidewall blocks are arranged to be spaced apart in the tire circumferential direction via grooves extending in the tire radial direction. The mark protrudes outward in the tire axial direction from the outer surface around the mark, that is, the reference surface. The plurality of sidewall blocks each have a high protrusion, and the protrusion amount of the high protrusion relative to the reference plane is greater than or equal to the maximum protrusion amount of the mark relative to the reference plane. The plurality of sidewall pattern blocks include: a first sidewall pattern block overlapping the mark when viewed in the tire radial direction, and a second sidewall pattern block not overlapping the mark when viewed in the tire radial direction, The inner end of the high protrusion of the first sidewall pattern block in the tire radial direction is separated from the mark in the tire radial direction. A portion of the high protrusion of the second sidewall block overlaps the mark when viewed in the tire circumferential direction. The first sidewall pattern block has a low protrusion, The protrusion amount of the low protrusion relative to the reference plane is less than the maximum protrusion amount of the mark relative to the reference plane. The low protrusion portion extends from the high protrusion portion of the first sidewall block toward the inner side in the tire radial direction and is connected to the logo.

2. The pneumatic tire according to claim 1, characterized in that The sidewall portion has an annular protrusion extending continuously over the entire circumference of the tire. An inner end of the high protrusion of the first sidewall block in the tire radial direction is located further inward in the tire radial direction than the annular protrusion.

3. The pneumatic tire according to claim 1, wherein: The sidewall portion has an annular protrusion extending continuously over the entire circumference of the tire. An inner end in the tire radial direction of the high protrusion of the first sidewall block terminates at the annular protrusion.

4. The pneumatic tire according to claim 1, wherein: The low protrusion has a contour that protrudes from the reference plane and is annular when viewed along the tire axial direction. The protrusion amount of the annular inner portion of the contour relative to the reference surface is smaller than the protrusion amount of the contour.

5. The pneumatic tire according to any one of claims 1 to 4, characterized in that: The inner end of the high protrusion of the second side block in the tire radial direction is located at a position within a range of 10% of the tire cross-sectional height in the tire radial direction with the tire maximum width position as the center.

6. The pneumatic tire according to any one of claims 1 to 3, characterized in that: The dimension of the tire radial direction of the mark is greater than 13 mm.

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