Pneumatic tire

Abstract

The present invention relates to pneumatic tires. A pneumatic tire is provided which produces a new visual effect. The pneumatic tire is provided with a decorative area (11) on the side wall (10), characterized in that the decorative area (11) is covered with three kinds of planes (21, 22, 23) which are different in inclination with respect to the profile surface, two of the three kinds of planes (21, 22, 23) are arranged in a first direction and form pairs, and a plurality of pairs of different combinations are arranged in a second direction, and between adjacent pairs in the second direction, the boundaries of the two planes (21, 22, 23) arranged in the first direction are staggered in the first direction.

Description

[0001] This application is based on Japanese Patent Application No. 2022-015753 (Filing date: February 3, 2022) and claims priority under Article 8.37 of the Patent Law. This application includes the entire content of Japanese Patent Application No. 2022-015753. TECHNICAL FIELD

[0002] The present application relates to a pneumatic tire. BACKGROUND

[0003] Conventionally, a pneumatic tire in which a pattern composed of concaves and convexes is provided on a side surface of a tire is known. The pattern composed of concaves and convexes is mostly a plurality of convex lines extending in a straight line shape and arranged at intervals. In addition, a pattern in which a plurality of three-dimensional portions of the same shape are arranged is also known. For example, the pattern disclosed in Patent Literature 1 is a pattern in which a plurality of portions of a quadrangular pyramid are respectively provided as concave surfaces with respect to a reference surface.

[0004] PRIOR ART DOCUMENTS

[0005] PATENT LITERATURE

[0006] Patent Literature 1: Japanese Patent Application Publication No. 2008-273505 SUMMARY

[0007] (I) PROBLEMS TO BE SOLVED BY THE INVENTION

[0008] In addition, although many beautiful patterns have been proposed so far, a pattern that is epoch-making in terms of visual effects has not been proposed.

[0009] Therefore, it is an object of the present application to provide a pneumatic tire that produces a new visual effect.

[0010] (II) SOLUTION TO THE PROBLEM

[0011] The pneumatic tire according to the embodiment is characterized in that three kinds of planes that differ in inclination with respect to a profile surface cover a decorative region provided on a side surface of a tire, two of the three kinds of planes are arranged in a first direction and form pairs, a plurality of the pairs of different combinations are arranged in a second direction, and boundaries between the two planes arranged in the first direction are staggered in the first direction between the pairs of the second direction.

[0012] (III) EFFECT OF THE INVENTION

[0013] A new visual effect is produced from the pneumatic tire according to the embodiment due to the above-described features. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a half cross-sectional view in the axial direction of the pneumatic tire.

[0015] Figure 2 is a view of a side surface of a tire as viewed in the tire axial direction.

[0016] Figure 3 is a perspective view of a portion of the decorative area.

[0017] Figure 4 is a view showing one assembly in Figure 3 .

[0018] Figure 5 is a D-D line cross-sectional view of Figure 4 .

[0019] Figure 6 is an E-E line cross-sectional view of Figure 4 .

[0020] Figure 7 is an F-F line cross-sectional view of Figure 4 .

[0021] Figure 8 is a G-G line cross-sectional view of Figure 4 .

[0022] Figure 9 is a cross-sectional view of the vicinity of the tire radial direction end of the decorative area.

[0023] Figure 10 is a cross-sectional view of the pair of the modification example.

[0024] Figure 11 is a cross-sectional view of the pair of the modification example.

[0025] Figure 12 is a cross-sectional view of the vicinity of the tire radial direction end of the decorative area of the modification example.

[0026] Figure 13 is a cross-sectional view of the vicinity of the tire radial direction end of the decorative area of the modification example.

[0027] Figure 14 is a cross-sectional view of the vicinity of the tire radial direction end of the decorative area of the modification example.

[0028] BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 1…pneumatic tire, 2…carcass ply, 2a…folded back portion, 3…rubber chafer, 4…belt, 5…belt reinforcement, 6…tread rubber, 7…sidewall rubber, 8…rim line, 9…bead portion, 9a…bead core, 9b…shoulder core, 10…sidewall surface, 11…decorative area, 12…inboard side line, 13…outboard side line, 20…contour surface, 21…first plane, 22…second plane, 23…third plane, 24…inner boundary of pair. DETAILED DESCRIPTION

[0030] Figure 1 The cross-sectional configuration of the pneumatic tire 1 of the embodiment is shown. Furthermore, Figure 1 The shown is only one half in the tire axial direction, and the actual pneumatic tire 1 is approximately left-right symmetrical with respect to the center line C. In Figure 1 The tire axial direction is indicated by an arrow A, and the tire radial direction is indicated by an arrow B in Figure 1 and Figure 2 The tire radial direction is indicated by an arrow B, and the tire circumferential direction is indicated by an arrow R in Figure 2

[0031] In the pneumatic tire 1, a bead portion 9 is provided on both sides in the tire axial direction. The bead portion 9 is configured to include a bead core 9a composed of a steel wire wound in a circular shape, and a rubber-made bead filler 9b provided on the radially outer side of the bead core 9a.

[0032] One or two pieces of a carcass ply 2 are erected on the bead portion 9 on both sides in the tire axial direction. The carcass ply 2 is a sheet-like member in which a plurality of ply cords arranged in a direction orthogonal to the tire circumferential direction are covered with rubber. The carcass ply 2 forms a skeleton shape of the pneumatic tire 1 between the bead portions 9 on both sides in the tire axial direction, and is folded back and wound from the inner side to the outer side in the tire axial direction around the bead portion 9, thereby enclosing the bead portion 9. In addition, a rubber bead filler 3 is provided at a position on the outer side in the tire axial direction of a folded-back portion 2a of the carcass ply 2.

[0033] In addition, a plurality of belts 4 are provided on the radially outer side of the carcass ply 2, and a belt reinforcement 5 is provided on the radially outer side of the belt 4. The belt 4 is a member in which a plurality of cords made of steel are covered with rubber. The belt reinforcement 5 is a member in which a plurality of cords made of organic fiber are covered with rubber. A tread rubber 6 is provided on the radially outer side of the belt reinforcement 5. The tread rubber 6 is provided with a plurality of grooves to form a tread pattern.

[0034] In addition, a side rubber 7 is provided on both sides in the tire axial direction of the carcass ply 2. The tread rubber 6 and the side rubber 7 overlap each other at a shoulder reinforcement portion, but one of the tread rubber 6 and the side rubber 7 can overlap the other on the tire surface side. A portion of the side rubber 7 on the radially inner side thereof extends to the vicinity of the bead portion 9, and covers a portion of the rubber bead filler 3.

[0035] A small protrusion, i.e., a rim line 8, having a height of about 1 mm is formed at the boundary of the side rubber 7 and the tire surface of the rubber bead filler 3. The rim line 8 is circumferentially provided around one turn. Furthermore, instead of the rim line 8, a rim protector protruding in a substantially triangular cross-sectional shape can be provided at the same position as the rim line 8. In the tire radial direction, a range from the rim line 8 or the rim protector to a tread end is set as a side face 10.

[0036] ​Here, the tread end refers to the axial end of the tire where the tread rubber 6 contacts the road surface when mounted on a standard rim and subjected to standard internal pressure and a standard load. Here, the standard rim refers to the rim specified for the tire within the specification system, including the tire's base specification. For example, JATMA refers to the standard rim, while TRA and ETRTO refer to the "Measuring Rim". Furthermore, standard internal pressure refers to the tire pressure specified for each specification within the specification system, including the tire's base specification. For truck / bus tires and light truck tires, JATMA refers to the maximum pressure, TRA refers to the maximum value recorded in the table "TIRE LOAD LIMITS AT VARIOUS COLDINFLATION PRESSURES", and ETRTO refers to "INFLATION PRESSURE". For passenger car tires, the standard internal pressure is typically 180 kPa, but tires labeled "Extra Load" or "Reinforced" have a standard pressure of 220 kPa. Standard load refers to the load capacity specified for each tire within the specification system, including the tire's base specification. For JATMA, it's the "maximum load capacity"; for TRA, it's the maximum value listed in the table "TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES"; and for ETRTO, it's "LOAD CAPACITY". The standard load for passenger car tires is equivalent to 88% of the aforementioned load values. For small racing tires, the standard load is 392 N.

[0037] In addition, a sheet-like inner liner is attached to the inside of the tire carcass ply 2. This inner liner is made of rubber with low air permeability. Besides these components, belt underlays, bead wraps, and other components are also provided according to the functional requirements of the tire.

[0038] like Figure 1 and Figure 2 As shown, a decorative area 11 is provided on at least one of the tire sidewalls 10 on both sides of the tire's axial direction. The decorative area 11 is an annular shape centered on the tire's rotation axis. The decorative area 11 is a strip-shaped area of ​​a certain width enclosed by an inner diameter sidewall 12 of a smaller diameter circle and an outer diameter sidewall 13 of a larger diameter circle. The inner diameter sidewall 12 and the outer diameter sidewall 13 can be lines formed on the tire surface by concavity, convexity, or steps, or they can be imaginary lines that do not actually exist.

[0039] The decorative area 11 occupies a portion of the area from the maximum width position of the pneumatic tire 1 to the tread end. Here, the maximum width position of the pneumatic tire 1 refers to the position with the longest axial length of the tire, from the surface of the sidewall 10 on one side of the tire's axial direction to the surface of the sidewall 10 on the other side of the tire's axial direction, when mounted on a standard rim and subjected to standard internal pressure and a standard load. The width (radial length of the tire) of the decorative area 11 is, for example, 5 mm or more and 50 mm or less.

[0040] Alternatively, the decorative area 11 may be configured to include portions where steps are likely to appear on the surface of the tire sidewall 10. Typically, portions where steps are likely to appear on the surface of the tire sidewall 10 refer to the end positions of the tire components. Typical examples of such portions include: the portion where the interface between the tread rubber 6 and the sidewall rubber 7 appears on the tire surface, and the axial position of the tire at the rolled-up end of the carcass ply 2 (the end of the folded-back portion 2a of the carcass ply 2).

[0041] like Figure 3 As shown, the decorative area 11 is entirely covered with three types of planes 21, 22, and 23. These three planes 21, 22, and 23 differ in whether they are inclined relative to the profile surface of the tire sidewall 10, and in the direction of their inclination. The first plane 21 is parallel to the profile surface. The second plane 22 is inclined relative to the profile surface in a manner that is higher on one side of a first direction and lower on the other side. The third plane 23 is inclined relative to the profile surface in a manner that is lower on one side of a first direction and higher on the other side.

[0042] In this embodiment, the first direction is the tire radial direction, and one side of the first direction is the inner radial side of the tire ( Figures 3-9 (B1 side in the middle), the other side of the first direction is the radial outer side of the tire ( Figures 3-9 (B2 side in the middle). Furthermore, the second direction, described later, is the tire circumferential direction (…). Figure 3 as well as Figure 4 (in the R direction).

[0043] Here, the profile surface of the tire sidewall 10 refers to the tire surface without any irregularities or depressions, such as decorations. The profile surface is a curved surface that smoothly connects the areas without irregularities on both radial sides of the decorative area 11.

[0044] In addition, strictly speaking, the inclination direction of planes 21, 22, and 23 relative to the contour surface refers to the inclination direction of planes 21, 22, and 23 relative to the surface perpendicular to the normal of the contour surface (it should be noted that this is the normal passing through the center position of planes 21, 22, and 23).

[0045] The inclination angles of the second plane 22 and the third plane 23 relative to the contour surface are preferably 10° or more and 30° or less. Additionally, the height of the second plane 22 and the third plane 23 in the direction perpendicular to the contour surface, from the lower edge to the higher edge (for reference, in...) Figure 9 (The height is indicated by the reference numeral H in the attached figure) is preferably 2mm or more and 4mm or less.

[0046] Viewed from a direction perpendicular to the profile surface, all three planes 21, 22, and 23 are rectangles of the same shape and size. In this embodiment, planes 21, 22, and 23 are rectangles that are longer in the radial direction of the tire. The ratio of the shorter side to the longer side of the rectangle is preferably 1:1 to 1:20. Furthermore, a rectangle with the ratio of 1:1 is a square. Additionally, the area of ​​planes 21, 22, and 23 when viewed from a direction perpendicular to the profile surface is, for example, 3 mm². 2 Above, 7mm 2 the following.

[0047] Furthermore, the three planes 21, 22, and 23 only need to be easily identifiable as rectangles, and the lengths and angles of each part do not necessarily strictly conform to the definition of a rectangle. For example, some error may exist between the two opposite sides of the rectangle. The difference in length between the two opposite sides is preferably within 10% of the length of either side. In addition, some error may exist in the interior angles relative to 90°.

[0048] All planes 21, 22, and 23 are set in recesses relative to the contour surfaces. Furthermore, as... Figure 9 As shown, the decorative area 11 is recessed from the contour surface 20. The first plane 21, parallel to the contour surface 20, is the bottom surface of the decorative area 11. The lower edges of the inclined second plane 22 and third plane 23 are located at the bottom surface of the decorative area 11, while the higher edges are located at a position higher than the bottom surface of the decorative area 11 and lower than the contour surface 20.

[0049] The decorative area 11 is formed by using three planes 21, 22, and 23. The area near the higher edge of the second plane 22 and the third plane 23 is a raised part of the concave-convex shape, while the first plane 21 is a recessed part of the concave-convex shape.

[0050] The arrangement of the three planes 21, 22, and 23 in the decorative area 11 is regular. First, two of the three planes 21, 22, and 23 are arranged in the first direction, i.e., the radial direction of the tire, and form a pair. The two planes 21, 22, and 23 that form the pair are in contact.

[0051] In this embodiment, there exists Figures 4-8 The four pairs shown refer to the first pair of the second plane 22 on the outer radial side B2 of the tire and the first plane 21 on the inner radial side B1 of the tire (see reference).Figure 4 and Figure 5 ), the second pair of groups (refer to Figure 4 and Figure 6 ), the third pair of groups (refer to Figure 4 and Figure 7 ), and the fourth pair of groups (refer to Figure 4 and Figure 8 ).

[0052] As shown in Figure 4 , Figure 5 and Figure 8 , in the first and fourth pairs of groups, a step is formed at the boundary of the two planes 21, 22, 23 that constitute the pair of groups. In addition, in the second and third pairs of groups, the boundary of the two planes 21, 22, 23 that constitute the pair of groups is curved. In the following description, the boundary of the two planes that constitute the pair of groups is referred to as the "in-pair boundary".

[0053] The four types of pairs of groups are arranged in the second direction, i.e., the tire circumferential direction R. The arrangement order is the first pair of groups to the fourth pair of groups. Adjacent pairs of groups contact each other. By concentrating the four types of pairs of groups, one aggregate is formed. With respect to Figure 4 , the entire portion is one aggregate. The plurality of aggregates fill the decorative region 11 without gaps.

[0054] As shown in Figure 4 , between two groups of pairs of groups adjacent in the tire circumferential direction R, the positions of the in-pair boundaries 24 are offset in the tire radial direction (B1, B2 direction). The distance by which the in-pair boundaries 24 are offset in the tire radial direction is half the tire radial length of the planes 21, 22, 23. Therefore, the in-pair boundaries 24 in the odd-numbered pairs of groups in the tire circumferential direction R (the first and third pairs of groups) are arranged on one line, and the in-pair boundaries 24 in the even-numbered pairs of groups in the tire circumferential direction R (the second and fourth pairs of groups) are arranged on another line. In this way, the line through which the in-pair boundaries 24 pass is set as the reference line L (refer to Figure 4 ). The reference line L is an imaginary line that extends in the tire circumferential direction R.

[0055] Because the in-pair boundaries 24 are thus offset, two planes 21, 22, 23 adjacent in the tire circumferential direction R are offset in the tire radial direction (B1, B2 direction) by half the tire radial length of one plane 21, 22, 23.

[0056] With respect to the reference line L passing through the pair-group inner boundary 24 of one pair group, the reference line L passes through the center position in the tire radial direction of the planes 21, 22, 23 of another pair group adjacent in the tire circumferential direction R. On such a reference line L, a step is formed between the planes 21, 22, 23 adjacent in the tire circumferential direction R. For example, as shown in FIG. 6, the pair-group inner boundary 24 of the first pair group (also the end portion of the second plane 22) is positioned higher than the second plane 22 of the second pair group adjacent in the tire circumferential direction R. Also, a step is formed between the pair-group inner boundary 24 of the first pair group and the second plane 22 of the second pair group. Likewise, as shown in FIGS. 7 and 8, a step is formed between the second pair group and the third pair group, between the third pair group and the fourth pair group, and between the fourth pair group and the first pair group, that is, between the planes 21, 22, 23 adjacent in the tire circumferential direction R. Figure 5 Figure 4 Figures 6-8

[0057] Although not shown, a mark or the like can be provided outside the decorative area 11 of the side wall 10. The mark or the like is depicted with concavo-convex.

[0058] Such a decorative area 11 can be formed by a mold at the time of vulcanization molding of the pneumatic tire 1. The shape of the plurality of planes 21, 22, 23 is formed on the molding surface of the mold used for the vulcanization molding, respectively.

[0059] As described above, in the pneumatic tire 1 of the present embodiment, the three kinds of planes 21, 22, 23 different in inclination from the profile surface are spread over the decorative area 11. Also, of the two kinds of planes 21, 22, 23, the two kinds of planes 21, 22, 23 are arranged in the tire radial direction and form pair groups, and the plurality of pair groups of different combinations are arranged in the tire circumferential direction R. Also, between the pair groups adjacent in the tire circumferential direction R, the pair-group inner boundaries 24 (boundaries of the two planes 21, 22, 23 arranged in the tire radial direction) are offset in the tire radial direction. Thus, a new visual effect is produced from the pneumatic tire 1.

[0060] Specifically, since the three kinds of planes 21, 22, 23 are different in inclination, light is reflected in different directions, respectively. Also, since the two kinds of planes 21, 22, 23 form pair groups, the plurality of pair groups of different combinations are arranged in the tire circumferential direction R, and the pair-group inner boundaries 24 are offset in the tire radial direction between the two pair groups adjacent in the tire circumferential direction R, light is reflected toward each direction from the plurality of planes 21, 22, 23 within a prescribed range. Thus, a complex light like a water surface (a water surface also reflects light in a plurality of directions) is produced from the decorative area 11, thereby producing a new visual effect.

[0061] ​​​In addition, since the concavo-convex is formed in the decorative region 11 by the planes 21, 22, 23, the decorative region 11 appears to be three-dimensional. Since it appears to be three-dimensional, the visual recognition of the decorative region 11 is improved.

[0062] In addition, it is known that, generally, when the so-called inflation in which the internal pressure is given to the pneumatic tire 1, the stripe-shaped depressions extending in the tire radial direction are generated in the side surface. However, in the side surface 10 of the present embodiment, the concavo-convex is formed by the three kinds of planes 21, 22, 23, so that the stripe-shaped depressions are not conspicuous.

[0063] Here, the direction in which the two kinds of planes 21, 22, 23 are arranged for each group is the tire radial direction, so that the light and shade of each plane 21, 22, 23 is clear when the pneumatic tire 1 is observed from the oblique upper side, and a more complex light is generated from the decorative region 11.

[0064] In addition, on the reference line L extending along the tire circumferential direction R through the group boundary 24, a step is formed between the adjacent planes 21, 22, 23 in the tire circumferential direction R, so that the reflection of the light from the adjacent planes 21, 22, 23 in the tire circumferential direction R is different. In addition, the step is not easy to reflect the light. Therefore, a complex reflection of the light is generated in the region of the plurality of groups arranged in the tire circumferential direction R, and a unique beauty is generated.

[0065] In addition, in the first group and the fourth group, a step is formed at the boundary of the two planes (two planes arranged in the tire radial direction) constituting the group, and the light is not easy to be reflected at the step. Therefore, a complex reflection of the light is generated in the decorative region 11 including the first group and the fourth group, and a unique beauty is generated.

[0066] In addition, since each plane 21, 22, 23 is an oblong shape which is long in the tire radial direction, the decorative region 11 appears to be brighter when the pneumatic tire 1 is observed from the oblique upper side. In addition, the planes 21, 22, 23 are oblong shapes which are long in the tire radial direction and are arranged in the tire radial direction along the profile surface which is a curved surface, so that the stripe-shaped depressions extending in the tire radial direction generated at the time of inflation are not conspicuous.

[0067] In addition, the decorative region 11 is a belt-shaped region which surrounds one turn in the tire circumferential direction R, and the planes 21, 22, 23 are spread over the belt-shaped region, so that a beauty is generated from the entire circumference of the side surface 10.

[0068] In addition, the decorative region 11 is recessed as a whole from the profile surface of the side surface 10, so that the planes 21, 22, 23 are difficult to be damaged by a curbstone or the like.

[0069] The above embodiments are merely examples, and the scope of the application is not limited to the above embodiments. Various modifications can be made to the above embodiments without departing from the spirit of the application. The following describes various modified examples, but any one of the modified examples or two or more of the modified examples can be applied to the above embodiments without causing a contradiction, within a range not causing a contradiction.

[0070] <Modified Example 1>

[0071] The decorative region can also be a region of a prescribed shape other than a circular ring. As the prescribed shape, a logo, a shape of a character with a design sense, a figure, or the like can be cited. In such a region of a prescribed shape, the plurality of planes 21, 22, 23 are respectively laid out so as to be full, as in the above embodiments. Thereby, the logo or the like appears to be beautiful.

[0072] <Modified Example 2>

[0073] There can be pairs other than the first to fourth pairs of the above embodiments. Specifically, there can be a pair of the first plane 21 on the tire radial direction outer side B2 and the second plane 22 on the tire radial direction inner side B1 ( Figure 10 ), and a pair of the second plane 22 on the tire radial direction outer side B2 and the third plane 23 on the tire radial direction inner side B1 ( Figure 11 ).

[0074] <Modified Example 3>

[0075] The types of pairs included in one decorative region are not limited to the four types of the above embodiments. The types of pairs can be multiple, and pairs of different types can be adjacent to each other in the second direction (for example, the tire circumferential direction). For example, as the pairs, only any two of the first to fourth pairs of the above embodiments can exist.

[0076] <Modified Example 4>

[0077] The first direction can be the tire circumferential direction and the second direction can be the tire radial direction, contrary to the above embodiments. In this case, the two types of planes inclined differently are arranged in the first direction, that is, the tire circumferential direction, and form pairs, and such pairs are arranged in the second direction, that is, the tire radial direction. Also, between pairs adjacent in the tire radial direction, the pair inner boundaries (boundaries of the two planes arranged in the tire circumferential direction) are offset in the tire circumferential direction. In the case of this modified example, it is also preferable that each plane be an oblong shape that is longer in the tire radial direction.

[0078] <Modified Example 5>

[0079] Each plane can also be an oblong shape that is longer in the tire circumferential direction.

[0080] <Modified Example 6>

[0081] The height of each plane from the contour surface is not limited. As shown in Figure 12 the second plane 22 and the third plane 23 can be located lower than the contour surface 20 at the lower side and higher than the contour surface 20 at the upper side. In this case, the protrusions of the concave-convex formed by the planes 21, 22, 23 protrude higher than the contour surface 20, and light is easily irradiated, and the depressions are depressed lower than the contour surface 20, and light is difficult to be irradiated. Therefore, the contrast is enhanced.

[0082] In addition, as shown in Figure 13 the first plane 21 can also be at the same height as the contour surface 20. In addition, as shown in Figure 14 all the planes 21, 22, 23 can be higher than the contour surface 20.

Claims

1. A pneumatic tire provided with a decorative area in a side surface of a tire, characterized in that, three planes inclined differently with respect to a profile surface fill the decorative area, the planes are oblongs longer in a first direction, the three planes are respectively a first plane parallel to the profile surface, a second plane inclined with respect to the profile surface higher on one side in the first direction and lower on the other side in the first direction, and a third plane inclined with respect to the profile surface lower on one side in the first direction and higher on the other side in the first direction, the first plane is a bottom surface of the decorative area, an end portion of the second plane on the other side in the first direction and an end portion of the third plane on one side in the first direction are located at positions of the bottom surface of the decorative area, an end portion of the second plane on one side in the first direction and an end portion of the third plane on the other side in the first direction are located at positions lower than the profile surface, the first plane and the second plane are aligned in the first direction and form a first pair of groups, the first plane and the third plane are aligned in the first direction and form a second pair of groups, the second plane and the third plane are aligned in the first direction and form a third pair of groups, the first pair of groups, the second pair of groups, and the third pair of groups are aligned in a second direction, between the pair of groups adjacent in the second direction, boundaries of the two planes aligned in the first direction within the pair of groups are staggered in the first direction, the decorative area is recessed as a whole from the profile surface of the side surface of the tire.

2. The pneumatic tire according to claim 1, characterized in that, a step is formed between the planes adjacent in the second direction on a line extending in the second direction through the boundaries of the two planes aligned in the first direction.

3. The pneumatic tire according to claim 1 or 2, characterized in that, in at least a part of the pair of groups, boundaries of the two planes aligned in the first direction and constituting the pair of groups form a step.

4. The pneumatic tire according to claim 1 or 2, characterized in that, the decorative area is a belt-shaped area surrounding one turn in a tire circumferential direction, and a plurality of the planes fill the belt-shaped area.

5. The pneumatic tire according to claim 1 or 2, characterized in that, the decorative area is a prescribed shape area, and a plurality of the planes fill an inside of the prescribed shape area.

6. The pneumatic tire according to claim 1 or 2, characterized in that, the first direction is a tire radial direction, and the second direction is a tire circumferential direction.

7. The pneumatic tire according to claim 1 or 2, characterized in that, a distance by which the boundaries of the two planes aligned in the first direction between the pair of groups adjacent in the second direction are staggered in the first direction is half of a length of the first direction of the planes.

Images