JP2009154664A - Pneumatic tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pneumatic tire 2 superior in productivity and steering stability. <P>SOLUTION: This tire 2 includes a tread 4 of which outer surface is a tread surface 18, a pair of bead portions 8, a carcass 10 bridged between both bead portions 8 and a belt 12 located in the radial direction of the carcass 10. The belt 12 includes an inner layer 28, an outer layer 30 to be laminated outside in the radial direction of the inner layer 28 and a pair of folded layers 32 to be placed away from each other in the axial direction. The folded layers 32 are folded back at edges 34 of the inner layer 28. The folded layers 32 include a main portion 38 placed between the inner layer 28 and the carcass 10 and a folding-back portion 40 to be laminated outside in the radial direction of the inner layer 28. The folding-back portion 40 is located outside in the axial direction of the outer layer 30. Preferably, in the tire 2, a distance in the axial direction from an edge PA of the belt 12 to an edge 42 of the main portion 38 is ≥15 mm and ≥60 mm. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pneumatic tire.

  A tire is configured by combining a number of members such as a tread, a sidewall, a bead, a carcass, and a belt. The performance of the tire is improved by adjusting the specifications and combinations of these members.

  In this tire, the belt is located outside the carcass in the radial direction. The belt contains a number of cords in parallel. Each cord is inclined with respect to the equator plane. The belt reinforces the carcass.

Japanese Unexamined Patent Publication No. 4-365603 discloses a tire that is excellent in ride comfort and high-speed durability without deteriorating maneuverability. The tire belt includes an inner layer and an outer layer. The inner layer is folded from the radially inner side to the outer side at the end of the outer layer. Due to the folding of the inner layer, the end of the outer layer is wrapped with the inner layer. Such a structure is called a fold structure. This wrapping can contribute to the lateral stiffness of the tire while restraining the movement of the belt end.
JP-A-4-365603

  From the viewpoint of handling stability, adoption of the fold structure is being studied for tires that can be mounted on a vehicle equipped with a high output engine such as a racing car.

  As described above, in the belt having a fold structure, the inner layer is folded from the radially inner side toward the outer side at the end of the outer layer. This folded inner layer is laminated radially outward of the outer layer. In a tire provided with this belt, a step is formed on the tread side of the belt. In this tire, the thickness of the tread in the portion where the folded inner layer is located is thinner than the thickness of the other portion. In this tire, since the thickness of the tread is not uniform, the occurrence of uneven wear is a concern. This level difference affects the durability of the tire.

  In some tires, the outer layer is folded from the radially outer side toward the inner side at the end of the inner layer to form a fold structure. In this tire, no step is formed on the tread side of the belt. In this tire, the thickness of the tread is uniform. In this tire, the occurrence of uneven wear can be suppressed. Incidentally, as described above, the tire is formed by laminating various members. It is not easy to form the tire while forming the belt by folding the outer layer from the radially outer side toward the inner side at the end of the inner layer. Such a fold structure affects tire productivity.

  An object of the present invention is to provide a pneumatic tire excellent in productivity and steering stability.

  A pneumatic tire according to the present invention includes a tread whose outer surface forms a tread surface, a pair of beads, a carcass spanned between both beads, and a belt positioned on the outer side in the radial direction of the carcass. The belt includes an inner layer, an outer layer stacked on the outer side in the radial direction of the inner layer, and a pair of bent layers disposed apart from each other in the axial direction. The bending layer is folded at the end of the inner layer. The bending layer includes a main portion located between the inner layer and the carcass, and a folded portion that is stacked on the radially outer side of the inner layer. The folded portion is located on the outer side in the axial direction of the outer layer.

  Preferably, in this tire, the axial distance from the end of the belt to the end of the main part is 15 mm or more and 60 mm or less.

  Preferably, in the tire, the thickness of the tread at the boundary position between the outer layer and the folded portion of the tread is 10 mm or less.

  Preferably, in the tire, the inner layer includes a first cord that is inclined with respect to a circumferential direction. The outer layer includes a second cord that is inclined with respect to the circumferential direction. The bending layer includes a third cord that is inclined with respect to the circumferential direction. The inclination direction of the first cord is the same as the inclination direction of the third cord included in the main part constituting the bent layer. The inclination direction of the second cord is the same as the inclination direction of the third cord included in the folded portion constituting the bent layer.

  Preferably, in the tire, an inclination angle of the second cord is larger than an inclination angle of the third cord included in the folded portion. The difference between the inclination angle of the second cord and the inclination angle of the third cord is 3 ° or more.

  Preferably, in this tire, the inclination angle of the third cord included in the folded portion is larger than the inclination angle of the second cord. The difference between the inclination angle of the third cord and the inclination angle of the second cord is 3 ° or more.

  In this tire, the belt includes a bent layer that wraps around the end of the inner layer. The bending layer can contribute to the lateral rigidity of the tire while restraining the end of the inner layer. This tire is excellent in handling stability. Since the folded portion formed by folding the bent layer is located on the outer side in the axial direction of the outer layer, no step due to the folding is formed on the belt. In this tire, since the tread has a uniform thickness, the occurrence of uneven wear can be suppressed. This tire is excellent in durability. In this tire, the belt is formed by wrapping the end of the inner layer with the bent layer and then laminating the outer layer on the inner layer. The formation of this belt is easy. This bending layer can contribute to an improvement in the productivity of a tire having a fold structure.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with appropriate reference to the drawings.

  FIG. 1 is a cross-sectional view showing a part of a pneumatic tire 2 according to an embodiment of the present invention. In FIG. 1, the vertical direction is the radial direction, the horizontal direction is the axial direction, and the direction perpendicular to the paper surface is the circumferential direction. The tire 2 has a substantially left-right symmetric shape centered on a one-dot chain line CL in FIG. This alternate long and short dash line CL represents the equator plane of the tire 2. The tire 2 includes a tread 4, a sidewall 6, a bead 8, a carcass 10, a belt 12, an inner liner 14, and a chafer 16. The tire 2 is a tubeless type.

  The tread 4 is made of a crosslinked rubber. The tread 4 includes a tread surface 18. The tread surface 18 is in contact with the road surface.

  The sidewall 6 extends substantially inward in the radial direction from the end of the tread 4. The sidewall 6 is made of a crosslinked rubber. The sidewall 6 absorbs an impact from the road surface by bending. Furthermore, the sidewall 6 prevents the carcass 10 from being damaged.

  The bead 8 is located substantially inward of the sidewall 6 in the radial direction. The bead 8 includes a core 20 and an apex 22 that extends radially outward from the core 20. The core 20 has a ring shape. The core 20 includes a plurality of non-stretchable wires (typically steel wires). The apex 22 is tapered outward in the radial direction. The apex 22 is made of a highly hard crosslinked rubber.

  The carcass 10 includes a first carcass ply 24 and a second carcass ply 26. The first carcass ply 24 and the second carcass ply 26 are bridged between the beads 8 on both sides, and are along the inside of the tread 4 and the sidewall 6. The first carcass ply 24 and the second carcass ply 26 are folded around the core 20 of the bead 8 from the inner side to the outer side in the axial direction.

  Although not shown, the first carcass ply 24 and the second carcass ply 26 are composed of a large number of cords arranged in parallel and a topping rubber. The absolute value of the angle formed by each cord with respect to the equator plane is usually 50 ° to 80 °. The cord is usually made of organic fibers. Examples of preferable organic fibers include polyester fibers, nylon fibers, rayon fibers, polyethylene naphthalate fibers, and aramid fibers. A carcass 10 having a bias structure may be employed.

  FIG. 2 is an enlarged cross-sectional view showing a part of the tire 2 of FIG. FIG. 2 shows a portion near the end of the tread 4 of the tire 2 (shoulder region). The belt 12 is located on the radially outer side of the carcass 10. The belt 12 is laminated with the carcass 10. The belt 12 reinforces the carcass 10. The belt 12 is located on the inner side in the radial direction of the tread 4. The belt 12 is located between the tread 4 and the carcass 10. The belt 12 includes an inner layer 28, an outer layer 30, and a pair of bending layers 32.

  The inner layer 28 is located on the radially outer side of the carcass 10. The inner layer 28 is laminated on the carcass 10. The end 34 of the inner layer 28 is located near the end of the tread 4. Although not shown, the inner layer 28 is composed of a large number of first cords arranged in parallel and a topping rubber. Each first cord is inclined with respect to the circumferential direction. The absolute value of the angle formed by the first cord with respect to the circumferential direction (hereinafter referred to as an inclination angle) is not less than 15 ° and not more than 30 °. The first cord is preferably made of aramid fiber. An organic fiber other than an aramid fiber may be used for the first cord. The material of the first cord may be steel.

  The outer layer 30 is located on the radially outer side of the inner layer 28. The outer layer 30 is laminated on the inner layer 28. The end 36 of the outer layer 30 is located near the end of the tread 4. As shown, the end 36 of the outer layer 30 is located axially inward of the end 34 of the inner layer 28. In the tire 2, the axial width of the outer layer 30 is smaller than the axial width of the inner layer 28. Although not shown, the outer layer 30 is composed of a number of second cords arranged in parallel and a topping rubber. Each second cord is inclined with respect to the circumferential direction. In the tire 2, the inclination direction of the second cord is opposite to the inclination direction of the first cord. The absolute value of the inclination angle of the second cord is not less than 15 ° and not more than 30 °. The second cord is preferably made of aramid fiber. An organic fiber other than an aramid fiber may be used for the second cord. The material of the second cord may be steel.

  The bending layer 32 is located in the shoulder region. The left and right bent layers 32 are spaced apart in the axial direction. Although not shown, the bending layer 32 is composed of a large number of parallel third cords and topping rubber. Each third cord is inclined with respect to the circumferential direction. The absolute value of the inclination angle of the third cord is not less than 15 ° and not more than 30 °. The third cord is preferably made of aramid fiber. An organic fiber other than an aramid fiber may be used for the third cord. The material of the third cord may be steel.

  As shown, the flex layer 32 is folded at the end 34 of the inner layer 28. Bending layer 32 wraps end 34 of inner layer 28. By this folding, the bent layer 32 is formed with a main portion 38 positioned between the inner layer 28 and the carcass 10 and a folded portion 40 positioned on the radially outer side of the inner layer 28. In other words, the bending layer 32 includes the main portion 38 and the folded portion 40. The main portion 38 extends axially inward from the end 34 portion of the inner layer 28. The main portion 38 is laminated on the inner side of the inner layer 28 in the radial direction. The main portion 38 is stacked on the carcass 10. In the tire 2, the end 42 of the main portion 38 is located on the inner side in the axial direction of the end 36 of the outer layer 30. The end 42 of the main portion 38 may be located outside the end 36 of the outer layer 30 in the axial direction. An end 42 of the main portion 38 is one end of the bending layer 32. The folded portion 40 extends inward in the axial direction from a portion of the end 34 of the inner layer 28. The folded portion 40 is stacked on the radially outer side of the inner layer 28. The folded portion 40 is located inside the tread 4. The folded portion 40 is located outside the outer layer 30 in the axial direction. An end 44 of the folded portion 40 is the other end of the bending layer 32.

  The tire 2 is manufactured as follows. First, an inner layer 28 including a first cord and a topping rubber, an outer layer 30 including a second cord and a topping rubber, and two bending layers 32 including a third cord and a topping rubber are formed. Next, the bending layers 32 are respectively arranged at positions corresponding to the left and right shoulder regions. Next, the inner layer 28 is arranged so as to bridge both the bending layers 32. At this time, the end 34 portion of the inner layer 28 is laminated on the bending layer 32. Next, the other end 44 side of the bending layer 32 is lifted upward, and the bending layer 32 is folded at the end 34 of the inner layer 28. By this folding, a main portion 38 located inside the inner layer 28 and a folding portion 40 located outside the inner layer 28 are formed. Next, the outer layer 30 is laminated to the inner layer 28. The outer layer 30 is disposed between the left and right folded portions 40. In this way, the belt 12 is formed. The belt 12 is assembled with members such as the tread 4, the sidewall 6, and the carcass 10 to obtain a low cover (also referred to as an unvulcanized tire 2). The process in which the raw cover is obtained in this way is called a molding process.

  Next, the raw cover is subjected to a vulcanization process. In the vulcanization process, this raw cover is first put into an opened mold. When thrown, the bladder is contracted. When thrown, the bladder is positioned inside the raw cover. Next, the bladder expands due to gas filling. Due to this expansion, the raw cover is deformed. This deformation is called shaping. Next, the mold is tightened. Next, the internal pressure of the bladder is increased. The raw cover is pressed between the cavity surface of the mold and the outer surface of the bladder. The raw cover is heated by heat conduction from the bladder and the mold. The rubber composition of the raw cover flows by pressurization and heating. The rubber composition causes a crosslinking reaction by heating, and the tire 2 is obtained.

  In the tire 2, the outer layer 30 is located between the left and right folded portions 40. The end 44 of the folded portion 40 is located outside the end 36 of the outer layer 30 in the axial direction. As illustrated, in the tire 2, no step is formed on the outer surface of the belt 12 constituted by the outer surface 46 of the outer layer 30 and the outer surface 48 of the folded portion 40. In the tire 2, the tread 4 has a uniform thickness. In the tire 2, the occurrence of uneven wear can be suppressed. The tire 2 is excellent in durability.

  In the tire 2, the bending layer 32 wraps the end 34 of the inner layer 28. The bent layer 32 can contribute to the lateral rigidity of the tire 2 while constraining the end 34 of the inner layer 28. The tire 2 is excellent in handling stability.

  In the tire 2, after the end 34 of the inner layer 28 is wrapped with the bending layer 32, the outer layer 30 is laminated on the inner layer 28 to form the belt 12. Formation of this belt 12 is easy. The bent layer 32 can contribute to the productivity improvement of the tire 2 having a fold structure.

  In the tire 2, it is preferable that the end 42 of the main portion 38 and the end 44 of the turned-up portion 40 are arranged apart from each other in the axial direction. In the tire 2 configured as described above, formation of a portion having a specific rigidity is suppressed. In the tire 2, the occurrence of uneven wear can be suppressed. The tire 2 is excellent in durability. As shown in the drawing, in the tire 2, the end 44 of the folded portion 40 is located on the outer side in the axial direction of the end 42 of the main portion 38. The end 44 of the folded portion 40 may be located on the inner side in the axial direction of the end 42 of the main portion 38.

  In the tire 2, the end 36 of the outer layer 30 and the end 44 of the folded portion 40 are preferably close to each other. Due to this proximity, formation of a portion having a specific rigidity is suppressed. In the tire 2, the occurrence of uneven wear can be suppressed. The tire 2 is excellent in durability. From this viewpoint, the distance between the end 36 of the outer layer 30 and the end 44 of the folded portion 40 is preferably 5 mm or less, and more preferably 3 mm or less. Particularly preferably, this distance is 0 mm.

  In the tire 2, the inclination direction of the second cord included in the outer layer 30 is preferably the same as the inclination direction of the third cord included in the folded portion 40. In the tire 2 configured as described above, the concentration of strain at the boundary between the outer layer 30 and the folded portion 40 is suppressed. The tire 2 is excellent in durability. As described above, in the tire 2, the inclination direction of the first cord included in the inner layer 28 is opposite to the inclination direction of the second cord, and the main portion 38 and the turn-up portion 40 are folded by the turn-up of the bending layer 32. Is formed. In the tire 2, the inclination direction of the first cord is the same as the inclination direction of the third cord included in the main portion 38.

  In the tire 2, the inclination direction of the second cord included in the outer layer 30 and the inclination direction of the third cord included in the folded portion 40 can be easily adjusted. In the tire 2, by this adjustment, performance different from the productivity and the steering stability can be easily controlled without impairing the productivity and the steering stability. In the tire 2 in which the inclination angle of the second cord is larger than the inclination angle of the third cord included in the folded portion 40, the grip property, the traction property, and the riding comfort can be improved. From this viewpoint, it is preferable that the difference between the inclination angle of the second cord and the inclination angle of the third cord is 3 ° or more. In the tire 2, the inclination angle of the third cord may be larger than the inclination angle of the second cord. In this case, heat generation and wear in the center region of the tire 2 can be suppressed. In this case, the difference between the inclination angle of the third cord and the inclination angle of the second cord is preferably 3 ° or more.

  In FIG. 2, the point PA is the end of the belt 12. A double arrow line WA represents the axial width of the main portion 38 of the bending layer 32. A double arrow line DA represents an axial distance between the end 42 of the main portion 38 and the end 44 of the folded portion 40. A double arrow line DB represents an axial distance from the end 34 of the inner layer 28 to the end 44 of the folded portion 40. A double arrow line DC represents an axial distance from the end 34 of the inner layer 28 to the end 42 of the main portion 38. A double-pointed arrow TA represents the thickness of the tread 4 at the boundary position between the outer layer 30 and the folded portion 40. This thickness TA is obtained by measuring the length from the outer surface 48 to the tread surface 18 at the end 44 of the folded portion 40.

  In the tire 2, the axial width WA is preferably 15 mm or more and 60 mm or less. By setting the width WA to 15 mm or more, the bending layer 32 can contribute to the lateral rigidity of the tire 2 while restraining the end 34 of the inner layer 28. The tire 2 is excellent in handling stability. From this viewpoint, the width WA is more preferably 20 mm or more, and particularly preferably 25 mm or more. By setting the width WA to 60 mm or less, the mass of the tire 2 can be appropriately maintained. In this respect, the width WA is more preferably equal to or less than 55 mm, and particularly preferably equal to or less than 50 mm.

  In the tire 2, the distance DA is preferably 10 mm or more. By setting the distance DA to 10 mm or more, formation of a portion having a specific rigidity is suppressed. In the tire 2, the occurrence of uneven wear can be suppressed. The tire 2 is excellent in durability. In this respect, the distance DA is more preferably 15 mm or more, and particularly preferably 20 mm or more. Note that, as described above, in the tire 2, it is preferable that the end 42 of the main portion 38 and the end 44 of the folded portion 40 are separated in the axial direction, and therefore the upper limit value of the distance DA is not determined.

  In the tire 2, the distance DB is preferably 10 mm or more. By setting the distance DB to be 10 mm or more, the bending layer 32 can contribute to the lateral rigidity of the tire 2 while restraining the end 34 of the inner layer 28. The tire 2 is excellent in handling stability. From this viewpoint, the distance DB is more preferably 15 mm or more, and particularly preferably 20 mm or more.

  In the tire 2, the distance DC is preferably 10 mm or more. By setting the distance DC to be 10 mm or more, the bending layer 32 can contribute to the lateral rigidity of the tire 2 while restraining the end 34 of the inner layer 28. The tire 2 is excellent in handling stability. From this viewpoint, the distance DC is more preferably 15 mm or more, and particularly preferably 20 mm or more. Since the upper limit value of the axial width of the main portion 38 is 60 mm, the upper limit value of the distance DC is also 60 mm.

  In the tire 2, the thickness TA is preferably 10 mm or less. In the tire 2 in which the thickness TA is set to 10 mm or less, the bending layer 32 can contribute to productivity while suppressing the occurrence of uneven wear. In this respect, the thickness TA is more preferably 7 mm or less, and particularly preferably 5 mm or less.

  In the present invention, the dimension and angle of each member of the tire 2 are measured in a state where the tire 2 is not filled with air without incorporating the tire 2 into the rim.

  Hereinafter, the effects of the present invention will be clarified by examples. However, the present invention should not be construed in a limited manner based on the description of the examples.

[Example 1]
A pneumatic tire of Example 1 having the basic configuration shown in FIG. 1 and having the specifications shown in Table 1 below was obtained. The tire size is 265 / 35R18. The tire belt includes an inner layer, an outer layer, and a bent layer. The bending layer is folded at the end of the inner layer. By this folding, a main part stacked on the radially inner side of the inner layer and a folded part stacked on the radially outer side of the inner layer are formed. The thickness TA of the tread at the boundary position between the outer layer and the folded portion is 5 mm. The width WA of the folded portion is 20 mm. The width WB of the main part is 30 mm. The inclination angle of the second cord included in the outer layer is 20 ° (degree). The inclination angle of the third cord included in the folded portion is 20 °. The inclination angle of the first cord included in the inner layer is −20 °. In this tire, the folded portion is located on the outer side in the axial direction of the outer layer, and the end of the outer layer and the end of the folded portion are joined together. The outer layer and the folded portion do not overlap. In Table 1, the case where there is no overlap is indicated as “A”.

[Examples 2 to 5]
Tires were obtained in the same manner as in Example 1 except that the width WA was as shown in Tables 1 and 2 below.

[Examples 6 and 7]
A tire was obtained in the same manner as in Example 1 except that the inclination angle of the folded portion cord and the inclination angle of the outer layer cord were as shown in Table 2 below.

[Example 8]
A tire was obtained in the same manner as in Example 1 except that the thickness TA was as shown in Table 2 below.

[Comparative Example 4]
A tire was obtained in the same manner as in Example 1 except that the folded portion was overlapped on the outer layer. In Table 2, this overlap is shown as “B”.

[Comparative Example 1]
A tire was obtained in the same manner as in Example 1 except that the belt was formed by folding the outer layer at the end of the inner layer. The tire belt is not provided with a bending layer. The axial distance from the end of this belt to the end of the folded outer layer is 30 mm.

[Comparative Examples 2 to 3]
A tire was obtained in the same manner as in Example 1 except that the inner layer was folded at the end of the outer layer to form a belt. The tire belt is not provided with a bending layer. The axial distance from the end of the belt to the end of the folded inner layer is 30 mm.

[Evaluation of tire mass]
The mass of the prototype tire was measured and evaluated based on this measured value. This evaluation result is represented by an index value with Comparative Example 1 as 100. A smaller value indicates a smaller tire mass. The results are shown in Tables 1 and 2 below.

[Real car running test]
The prototype tire was mounted on a race vehicle having a displacement of 2600 cc. The internal pressure of this tire was 200 kPa. The size of the wheel is 10J × 18. This vehicle traveled on a circuit course and was subjected to sensory evaluations regarding driver stability and ride comfort. The evaluation results are shown in Tables 1 and 2 below as index values with Comparative Example 2 taken as 100. Larger values indicate better results.

[Abrasion evaluation]
With respect to the prototype tires mounted on the vehicle after the above running test, the wear amount of the portion where the tread surface was effectively grounded was measured, and the ratio of the minimum value to the maximum value was calculated. The results are shown in Tables 1 and 2 below as index values with Comparative Example 2 taken as 100. Larger values indicate better results. Furthermore, the occurrence of wear in the center region was also confirmed, and the results of confirmation are shown in Tables 1 and 2 below as index values with Comparative Example 2 taken as 100. Larger values indicate better results.

[Productivity evaluation]
The time required to produce one prototype tire was measured. The results are shown in Tables 1 and 2 below as index values with Comparative Example 1 taken as 100. The smaller this value, the better the productivity.

  As shown in Tables 1 and 2, the tires of the examples are excellent in productivity and steering stability, and the occurrence of uneven wear is suppressed. From this evaluation result, the superiority of the present invention is clear.

  The tire according to the present invention can be mounted on various vehicles.

FIG. 1 is a cross-sectional view showing a part of a pneumatic tire according to an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view showing a part of the tire of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Tire 4 ... Tread 6 ... Side wall 8 ... Bead 10 ... Carcass 12 ... Belt 14 ... Inner liner 16 ... Chafer 18 ... Tread surface 20 ... Core 22 ... Apex 24 ... First carcass ply 26 ... Second carcass ply 28 ... Inner layer 30 ... Outer layer 32 ... Bending layer 38 ... Main part 40 ... turn-up section

Claims (6)

A tread whose outer surface forms a tread surface, a pair of beads, a carcass spanned between both beads, and a belt positioned radially outward of the carcass;
The belt includes an inner layer, an outer layer stacked on the outer side in the radial direction of the inner layer, and a pair of bent layers disposed apart from each other in the axial direction.
This bending layer is folded at the end of the inner layer,
The bending layer includes a main portion located between the inner layer and the carcass, and a folded portion laminated on the radially outer side of the inner layer,
A pneumatic tire in which the folded portion is located on the outer side in the axial direction of the outer layer.   The tire according to claim 1, wherein an axial distance from an end of the belt to an end of the main portion is 15 mm or more and 60 mm or less.   The tire according to claim 1 or 2, wherein a thickness of the tread at a boundary position between the outer layer and the folded portion of the tread is 10 mm or less. The inner layer includes a first cord inclined with respect to a circumferential direction;
The outer layer includes a second cord inclined with respect to the circumferential direction;
The bending layer includes a third cord inclined with respect to the circumferential direction;
The inclination direction of the first cord is the same as the inclination direction of the third cord included in the main part constituting the bending layer,
The tire according to any one of claims 1 to 3, wherein an inclination direction of the second cord is the same as an inclination direction of the third cord included in the folded portion constituting the bent layer. The inclination angle of the second cord is larger than the inclination angle of the third cord included in the folded portion,
The tire according to any one of claims 1 to 4, wherein a difference between an inclination angle of the second cord and an inclination angle of the third cord is 3 ° or more. The inclination angle of the third cord included in the folded portion is larger than the inclination angle of the second cord,
The tire according to any one of claims 1 to 4, wherein a difference between an inclination angle of the third cord and an inclination angle of the second cord is 3 ° or more.

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