tire

Abstract

To provide a tire that can be suppressed from being defectively manufactured, while using a reinforcement belt using a cord extending along a tire width direction and a tire radial direction.SOLUTION: A pneumatic tire 10 comprises: a carcass 40 forming a tire skeleton; a pair of crossing belts 51 and 52, provided outside in a tire radial direction of the carcass 40, in which belt cords 51a and belt cords 52a cross each other; and a reinforcement belt 54 provided closer to outside in the tire radial direction than the crossing belts 51 and 52 and extended along a tire width direction and the tire radial direction to cover a plurality of reinforcement cords 54a arranged separately from each other with a predetermined interval. The reinforcement cords 54a, formed using predetermined metal materials, are arranged so that positions in a tire circumferential direction thereof are repeatedly changed between a position at one side in the tire circumferential direction and a position at the other side in the tire circumferential direction, with a straight line along a tire direction as a reference, in a tread surface view.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a tire including a reinforcing belt covering a reinforcing cord extending along the tire width direction and the tire radial direction. [Background technology]

[0002] Conventionally, pneumatic tires (hereinafter referred to as tires as appropriate) have a pair of intersecting belts with cords intersecting on the tire radially inner side of the tread that comes into contact with the road surface, and are structured to include a spiral belt (belt reinforcing layer) with cords extending in the tire circumferential direction, and a belt (protective layer) with cords extending in the tire width direction and tire radial direction (see Patent Document 1).

[0003] In a tire equipped with such a reinforcing belt, the protective layer suppresses the tensile strain of the cords in the belt reinforcing layer, thereby achieving both maintaining vehicle handling stability and improving tire durability, particularly in the final stages of tire wear. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5084834 Summary of the Invention [Problem to be solved by the invention]

[0005] On the other hand, tires equipped with the above-mentioned reinforcing belts have a problem of being prone to manufacturing defects. Specifically, when a green tire before vulcanization is expanded in the tire radial direction, the tread is compressed in the tire width direction, which makes it easy for the cords of the reinforcing belt to buckle or meander, resulting in manufacturing defects.

[0006] Therefore, the following disclosure has been made in consideration of the above circumstances, and aims to provide a tire that can suppress manufacturing defects while using a reinforcing belt made of cords extending along the tire width direction and the tire radial direction. [Means for solving the problem]

[0007] One aspect of the present disclosure is a tire (pneumatic tire 10) including a carcass (carcass 40) that forms a tire skeleton, and a pair of intersecting belts (intersecting belt 51, intersecting belt 52) ​​that are provided radially outward of the carcass and have cords (belt cord 51a, belt cord 52a) that intersect, and a reinforcing belt (reinforcing belt 54) that is provided radially outward of the intersecting belts, extends along the tire width direction and the tire radial direction, and covers a plurality of reinforcing cords (reinforcing cords 54a) that are arranged at a predetermined distance apart, and the reinforcing cords are formed using a predetermined metal material and are provided such that, when viewed from the tread surface, their positions in the tire circumferential direction repeatedly change between one side in the tire circumferential direction and the other side in the tire circumferential direction, based on a straight line (straight line L1) that runs along the tire direction. [Effects of the Invention]

[0008] According to the tire described above, manufacturing defects can be suppressed while using a reinforcing belt using cords extending in the tire width direction and the tire radial direction. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a cross-sectional view of a pneumatic tire 10 taken along the tire width direction and the tire radial direction. [Figure 2] FIG. 2 is an enlarged cross-sectional view of a portion of the pneumatic tire 10. As shown in FIG. [Figure 3] FIG. 3 is a partially exploded plan view of the carcass 40 and the belt layer 50. As shown in FIG. [Figure 4] FIG. 4 is a partially enlarged plan view of the reinforcing belt 54. As shown in FIG. [Figure 5] FIG. 5 is a partially enlarged plan view of a reinforcement belt 55 according to the first modified example. [Figure 6] FIG. 6 is a partially enlarged plan view of a reinforcement belt 56 according to the second modification. [Figure 7]FIG. 7 is a partially enlarged plan view of a reinforcement belt 57 according to the third modified example. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments will be described with reference to the drawings. Note that the same or similar reference numerals are used to designate the same functions or configurations, and descriptions thereof will be omitted as appropriate.

[0011] (1) Overall tire configuration Fig. 1 is a cross-sectional view of a pneumatic tire 10 according to this embodiment. Specifically, Fig. 1 is a cross-sectional view of the pneumatic tire 10 taken along the tire width direction and tire radial direction. Note that cross-sectional hatching is omitted in Fig. 1 (the same applies below). A tire equator line CL indicates the center of the pneumatic tire 10 in the tire width direction and tire circumferential direction.

[0012] The pneumatic tire 10 is mainly used for four-wheeled automobiles (vehicles) such as passenger cars. Four-wheeled automobiles may include light automobiles and SUVs (Sport Utility Vehicles), as well as sports cars suitable for sports driving.

[0013] As shown in FIG. 1, a pneumatic tire 10 includes a tread 20, a tire side portion 30, a carcass 40, a belt layer 50, and a bead portion 60.

[0014] The tread 20 is the portion that comes into contact with the road surface. A pattern (not shown) is formed on the tread 20 according to the usage environment of the pneumatic tire 10 and the type of vehicle on which it is mounted. The tread 20 may be formed with circumferential grooves 21 that extend in the circumferential direction of the tire to ensure drainage performance at least on wet road surfaces.

[0015] The tire side portion 30 is continuous with the tread 20 and is located on the tire radially inward side of the tread 20. The tire side portion 30 is a region from the outer end of the tread 20 in the tire width direction to the upper end of the bead portion 60. The tire side portion 30 may also be called a sidewall or the like.

[0016] The carcass 40 forms the skeleton (tire skeleton) of the pneumatic tire 10. The carcass 40 is provided on the tire radial direction inner side of the belt layer 50. In the embodiment, the carcass 40 has a two-ply structure.

[0017] The carcass 40 has a radial structure in which carcass cords 40a (not shown in FIG. 1, see FIG. 3) arranged radially in the tire radial direction are covered with a rubber material. However, the carcass 40 is not limited to a radial structure, and may have a bias structure in which the carcass cords 40a are arranged to cross each other in the tire radial direction.

[0018] The belt layer 50 is provided on the inner side in the tire radial direction of the tread 20. The belt layer 50 may be composed of a plurality of belts. Specifically, the belt layer 50 includes a pair of intersecting belts, specifically, an intersecting belt 51 and an intersecting belt 52.

[0019] The intersecting belts 51 and 52 are provided on the outer side in the tire radial direction of the carcass 40. The intersecting belt 52 is provided on the outer side in the tire radial direction of the intersecting belt 51. The width of the intersecting belt 51 may be wider or shorter than the width of the intersecting belt 52.

[0020] The intersecting belts 51 and 52 have belt cords. Specifically, in a tread surface view, a belt cord 51a (not shown in FIG. 1, see FIG. 3) of the intersecting belt 51 intersects with a belt cord 52a (see FIG. 3) of the intersecting belt 52.

[0021] In addition to the intersecting belts 51 and 52, the belt layer 50 may include a reinforcing belt that reinforces the structure of the pneumatic tire 10. In this embodiment, the belt layer 50 includes a cap belt 53 and a reinforcing belt .

[0022] The cap belt 53 is provided between the intersecting belt 52 and the reinforcing belt 54. The cap belt 53 has a circumferential cord 53a (not shown in FIG. 1, see FIG. 3) extending in the tire circumferential direction.

[0023] As shown in FIG. 1, the cap belt 53 preferably has a layer portion 53b that covers the outer ends of the intersecting belts 51 and 52 in the tire width direction.

[0024] In this embodiment, the layer portion 53b is configured as a separate body from the cap belt 53, but the layer portion may be formed by folding back the cap belt 53. Also, the cap belt 53 (and the layer portion 53b) do not necessarily have to be provided.

[0025] The reinforcement belt 54 is provided on the outer side in the tire radial direction than the intersecting belts 51 and 52. In the present embodiment, the reinforcement belt 54 is provided on the outer side of the cap belt 53 in the tire width direction.

[0026] The bead portion 60 is continuous with the tire side portion 30 and is located radially inward of the tire side portion 30. The bead portion 60 is locked to a rim wheel (not shown).

[0027] (2) Configuration of the belt layer 50 Fig. 2 is a partially enlarged cross-sectional view of the pneumatic tire 10. Specifically, Fig. 2 shows a cross-section of one side of the pneumatic tire 10 based on the tire equator line CL. Fig. 3 is a partially exploded plan view of the carcass 40 and the belt layer 50.

[0028] 2 and 3, the carcass 40 has a main body portion 41 and a folded-up portion 42. The main body portion 41 is provided across the tread 20, the tire side portions 30, and the bead portions 60, and is the portion that extends up to the bead portions 60 where it is folded up.

[0029] The folded-up portion 42 is connected to the main body portion 41 and is folded back to the outside in the tire width direction via the bead portion 60. In this embodiment, a folded-up end 42e, which is the outer end of the folded-up portion 42 in the tire width direction, is provided so as to contact the intersecting belt 51. Such a structure of the carcass 40 may be called an envelope structure or the like. Note that the folded-up end 42e does not necessarily have to extend to the position of the intersecting belt 51, and may have a structure (high turn-up structure) in which it terminates at the center of the tire radial direction of the tire side portion 30.

[0030] The carcass 40 is formed by covering carcass cords 40a with a rubber material. The material of the carcass cords 40a is not particularly limited, but the carcass cords 40a can be formed using, for example, organic fiber or steel.

[0031] The intersecting belt 51 has belt cords 51a. The belt cords 51a are provided inclined with respect to the tire width direction (and tire circumferential direction). In this embodiment, the angle α (acute angle side) formed by the belt cords 51a with the tire width direction, specifically, angle α1, is approximately 45 degrees.

[0032] The intersecting belt 52 has belt cords 52a. The belt cords 52a are provided inclined with respect to the tire width direction (and tire circumferential direction). In this embodiment, the angle α (acute angle side) formed by the belt cords 52a with the tire width direction, specifically, angle α2, is approximately 45 degrees.

[0033] In this embodiment, the belt cords 51a and 52a are formed using steel. In this manner, the belt cords 51a and 52a are arranged to intersect with each other in a tread surface view. The intersecting belt 51 (intersecting belt 52) ​​is formed by covering the belt cords 51a (belt cords 52a) with a rubber material.

[0034] The cap belt 53 covers the end of the tread 20 in the tire width direction. The cap belt 53 is provided on the tire radial direction outer side of the pair of intersecting belts 51 and 52. Specifically, the cap belt 53 is provided between the intersecting belt 52 and the reinforcing belt 54.

[0035] The cap belt 53 has a circumferential cord 53a wound around the tire circumferential direction. The circumferential cord 53a extends along the tire circumferential direction. That is, the circumferential cord 53a is arranged to be substantially parallel to the tire circumferential direction, in other words, perpendicular to the tire width direction. Specifically, the angle β formed by the circumferential cord 53a and the tire width direction is approximately 90 degrees.

[0036] The cap belt 53 can be formed by spirally winding a strip-shaped member, in which a circumferential cord 53a is covered with a rubber material, around the tire circumferential direction. The cap belt 53 may also be called a spiral belt.

[0037] The circumferential cord 53a is preferably formed using an organic fiber having a strength equal to or greater than a predetermined value. Specifically, the circumferential cord 53a may be a polyamide synthetic fiber (specifically, nylon) or an aramid fiber (specifically, Kevlar), or a hybrid of both fibers.

[0038] In this embodiment, a layer portion 53b separate from the cap belt 53 is provided at the outer end of the cap belt 53 in the tire width direction. Specifically, the layer portion 53b is provided so as to cover the outer ends of the intersecting belts 51 and 52 in the tire width direction. Note that the layer portion 53b may be provided so as to cover the folded end 42e of the carcass 40.

[0039] The reinforcement belt 54 has a plurality of reinforcement cords 54a. The reinforcement cords 54a extend in the tire width direction and the tire radial direction and are arranged at a predetermined distance apart. The reinforcement belt 54 is formed by covering the plurality of reinforcement cords 54a with a rubber material.

[0040] The extension direction of the reinforcement cords 54a is substantially parallel to the tire width direction. The reinforcement cords 54a are formed using a predetermined metal material. Specifically, the reinforcement cords 54a can be formed using steel. However, the material is not necessarily limited to steel, and metal cords containing other metals may also be used. The reinforcement cords 54a may have a structure in which multiple filaments are twisted, but the size of the filaments, twist structure, and the like can be selected depending on the application of the pneumatic tire 10, and are not particularly limited.

[0041] The reinforcing cords 54a may be provided in a non-linear manner when viewed from the surface of the tread. In this embodiment, the plurality of reinforcing cords 54a are all provided in a repeating wave shape.

[0042] The layer portion 53b is located on the outer side in the tire width direction of the reinforcement belt 54. It is preferable that the outer end portion in the tire width direction of the cap belt 53, i.e., the position in the tire radial direction of the layer portion 53b, coincides with the position in the tire radial direction of the reinforcement belt 54. Specifically, it is preferable that the outer surface in the tire radial direction of the layer portion 53b and the outer surface in the tire radial direction of the reinforcement belt 54 are flush with each other so as to avoid any step.

[0043] In addition, in the tire radial direction, a rubber layer such as a cover rubber (not shown) may be provided between the cap belt 53 and the reinforcing belt 54, and between the plies of the two-ply carcass 40, etc.

[0044] In addition, a predetermined gap G may be provided between the cap belt 53 and the reinforcement belt 54 in the tire width direction.

[0045] (3) Reinforcement belt configuration Fig. 4 is a partially enlarged plan view of the reinforcement belt 54. Specifically, Fig. 4 shows an enlarged view of a portion of the reinforcement belt 54 along the tire width direction and the tire circumferential direction (that is, when viewed from the tread surface).

[0046] 4, the reinforcement cords 54a are arranged at approximately equal intervals in the tire circumferential direction. In a tread surface view, the reinforcement cords 54a are arranged such that their positions in the tire circumferential direction repeatedly change between one side in the tire circumferential direction and the other side in the tire circumferential direction with respect to a straight line L1 extending along the tire direction.

[0047] In this embodiment, the reinforcement cords 54a are arranged so as to have a repeated wave shape in the tread surface view. That is, the reinforcement cords 54a meander in the tire circumferential direction with the straight line L1 as the reference. In other words, the reinforcement cords 54a are arranged so as to continuously protrude alternately in the tire circumferential direction.

[0048] The amplitude W of the reinforcement cords 54a in the tire circumferential direction is preferably 10 mm or less. The spacing between the reinforcement cords 54a is not particularly limited, but may be set so as to ensure an appropriate spacing between adjacent reinforcement cords 54a in relation to the amplitude in the tire circumferential direction. Considering the configuration of the steel cord used as the reinforcement cords 54a, the use and size of the pneumatic tire 10, etc., the amplitude W is preferably about 2 to 3 mm.

[0049] Furthermore, the amplitude of the reinforcing cord 54a in the tire circumferential direction may be set to an extent that provides a compression tolerance in the tire width direction that can prevent buckling or meandering of the reinforcing cord 54a due to compression of the tread 20 in the tire width direction when the raw tire before vulcanization is expanded in the tire radial direction.

[0050] (4) Modified reinforcement belt Next, modified examples of the reinforcement belt will be described. Specifically, modified examples 1 to 3 of the reinforcement belt will be described with reference to Figures 5 to 7. Below, differences from the reinforcement belt 54 will be mainly described.

[0051] (4.1) Change example 1 Fig. 5 is a partially enlarged plan view of a reinforcement belt 55 according to Modification Example 1. As shown in Fig. 5, the reinforcement belt 55 has a plurality of reinforcement cords 55a. Similar to the reinforcement cords 54a, the reinforcement cords 55a extend in the tire width direction and the tire radial direction, and are arranged at a predetermined distance apart.

[0052] The reinforcement cords 55a are arranged so as to repeat rectangular shapes in the tread surface view. Similar to the reinforcement cords 54a, the reinforcement cords 55a are arranged so that their positions in the tire circumferential direction in the tread surface view repeatedly change from one side in the tire circumferential direction to the other side in the tire circumferential direction with respect to a straight line L1 extending along the tire direction.

[0053] Furthermore, the amplitude W of the reinforcing cord 55a, which is provided in a rectangular shape when viewed from the tread surface, may be the same as the amplitude W of the reinforcing cord 54a, or may be slightly smaller or larger.

[0054] (4.2) Change example 2 Fig. 6 is a partially enlarged plan view of a reinforcement belt 56 according to Modification Example 2. As shown in Fig. 6, the reinforcement belt 56 has a plurality of reinforcement cords 56a. The reinforcement cords 56a extend in the tire width direction and the tire radial direction, and are arranged at a predetermined distance apart.

[0055] The reinforcing cord 56a, like the reinforcing cord 54a, is provided so as to have a repeating wave shape in the tread surface view. However, compared to the reinforcing cord 54a, the reinforcing cord 56a meanders more gently and has a smaller number of repetitions of the amplitude W in the tire width direction.

[0056] Similar to the reinforcement cord 54a, the reinforcement cord 56a is also arranged so that its position in the tire circumferential direction, as viewed from the tread surface, repeatedly changes between one side in the tire circumferential direction and the other side in the tire circumferential direction, based on a straight line L1 along the tire direction.

[0057] Furthermore, the amplitude W of the more gently meandering reinforcement cord 56a may be the same as, or slightly smaller or larger than, the amplitude W of the reinforcement cord 54a.

[0058] (4.3) Change example 3 Fig. 7 is a partially enlarged plan view of a reinforcement belt 57 according to Modification Example 3. As shown in Fig. 7, the reinforcement belt 57 has a plurality of reinforcement cords 57a. Similar to the reinforcement cords 54a, the reinforcement cords 57a extend in the tire width direction and the tire radial direction, and are arranged at a predetermined distance apart.

[0059] The reinforcing cords 57a are arranged so as to repeat triangular shapes in the tread surface view. Similar to the reinforcing cords 54a, the reinforcing cords 57a are arranged so that their positions in the tire circumferential direction repeatedly change from one side in the tire circumferential direction to the other side in the tire circumferential direction with respect to a straight line L1 extending along the tire direction in the tread surface view.

[0060] Furthermore, the amplitude W of the reinforcing cord 57a, which is provided in a rectangular shape when viewed from the tread surface, may be the same as the amplitude W of the reinforcing cord 54a, or may be slightly smaller or larger.

[0061] (5) Actions and Effects According to the above-described embodiment, the following advantageous effects can be obtained: Specifically, the pneumatic tire 10 is provided with the reinforcement belt 54 that is provided radially outward of the intersecting belts 51 and 52, extends along the tire width direction and the tire radial direction, and covers a plurality of reinforcement cords 54a that are arranged at a predetermined distance apart.

[0062] In addition, the reinforcing cord 54a is formed using a predetermined metal material (steel), and is arranged so that, when viewed from the tread surface, its position in the tire circumferential direction repeatedly changes between one side in the tire circumferential direction and the other side in the tire circumferential direction, based on a straight line L1 along the tire direction.

[0063] According to such a pneumatic tire 10, the reinforcement belt 54 can suppress tensile strain of the cap belt 53 (spiral belt), thereby improving the performance related to steering stability, particularly steering in critical areas, and durability. In addition, the reinforcement belt 54 also functions as a buffer layer for the intersecting belts 51 and 52 and the carcass 40 from the tread 20 side (input side), which is effective in reducing wiping, and in particular can effectively reduce wear due to slippage on the inner side when mounted on a vehicle.

[0064] Furthermore, because the reinforcing cords 54a are arranged so as to repeatedly change between one side in the tire circumferential direction and the other side in the tire circumferential direction, even if the tread is compressed in the tire width direction when the raw tire before vulcanization is expanded in the tire radial direction, the tolerance for deformation in the tire circumferential direction is high, and the reinforcing cords 54a are unlikely to buckle or meander due to the compression. Specifically, when the raw tire is expanded in the tire radial direction, the circumferential length of the belt layer 50 extends. As a result, the crossing belts 51 and 52 extend to a point close to the Poisson's ratio, and the crossing belt width decreases, so the width of the cap belt 53 is also likely to be compressed. Therefore, the reinforcing cords 54a are unlikely to buckle or meander.

[0065] According to the pneumatic tire 10, manufacturing defects can be suppressed while using the reinforcement belt 54 made of cords extending in the tire width direction and the tire radial direction. Note that, although to different degrees, this effect is similarly achieved by the reinforcement belts 55, 56, and 57 according to the modified examples.

[0066] Furthermore, by arranging the reinforcing cord 54a in a non-linear shape in advance, it is possible to use metal components such as steel, while suppressing compression of the cap belt 53 in the tire width direction due to high compression rigidity, which is difficult to achieve with organic fibers, and also suppress manufacturing defects such as those described above.

[0067] In particular, the reinforcing cords 54a are arranged so as to have a repeating wave pattern when viewed from the surface of the tread, which makes it possible to ensure sufficient compression tolerance of the reinforcing cords 54a in the tire width direction while also facilitating manufacturing.

[0068] In this embodiment, the amplitude of the reinforcement cord 54a in the tire circumferential direction is preferably 10 mm or less, and is desirably about 2 to 3 mm in consideration of the type (for passenger cars) of the pneumatic tire 10. This makes it possible to suppress the above-mentioned manufacturing defects while allowing the reinforcement belt 54 to exhibit the desired performance.

[0069] In this embodiment, a gap G is provided between the cap belt 53 and the reinforcement belt 54. Therefore, adverse effects on the ground contact surface of the tread 20 caused by contact between the cap belt 53 and the reinforcement belt 54 can be eliminated.

[0070] In the reinforcement belt 55 according to Modification 1, the reinforcement cords 55a are arranged so as to have a repeated rectangular shape when viewed from the tread surface. Therefore, by forming the reinforcement cords 55a into a rectangular shape in advance, it is possible to effectively prevent buckling and meandering of the reinforcement cords 55a while ensuring sufficient compression tolerance in the tire width direction of the reinforcement belt 55. The same effect is also achieved in the reinforcement belt 57 according to Modification 3.

[0071] Furthermore, in the reinforcement belt 56 according to Modification 2, the reinforcement cords 56a meander more gently and have a smaller number of repetitions of the amplitude W in the tire width direction than the reinforcement cords 54a. This makes it easier to manufacture than the reinforcement belt 54, and also ensures sufficient compression tolerance of the reinforcement cords 56a in the tire width direction.

[0072] (6) Other embodiments Although the embodiments have been described above, it will be obvious to those skilled in the art that the present invention is not limited to the description of the embodiments and that various modifications and improvements are possible.

[0073] For example, the pneumatic tire 10 includes the cap belt 53 (spiral belt), but the cap belt 53 is not essential. Alternatively, instead of the cap belt 53, a reinforcing belt having reinforcing cords arranged at a different angle may be provided.

[0074] The outer end of the cap belt 53 in the tire width direction may be folded back toward the outer side in the tire radial direction. Alternatively, the layer portion 53b may not be provided.

[0075] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure. [Explanation of symbols]

[0076] 10 Pneumatic tires 20 Tread 21 Circumferential groove 30 Tire side 40 Carcass 40a carcass cord 41 Main body 42 Folded section 42e Folded end 50 belt layers 51 Cross Belt 51a Belt cord 52 Cross Belt 52a Belt cord 53 Cap Belt 53a circumferential cord 53b Layer section 54, 55, 56,57 Reinforcement belt 54a, 55a, 56a, 57a Reinforcement cord 60 Bead section

Claims

1. a carcass that forms a tire skeleton; a pair of intersecting belts provided on the outer side of the carcass in the tire radial direction, the intersecting belts having cords; A cap belt covering a tread end portion in the tire width direction; A tire comprising: a reinforcing belt provided radially outward of the intersecting belt, extending along the tire width direction and the tire circumferential direction, and covering a plurality of reinforcing cords arranged at a predetermined distance from each other; The reinforcing cord is It is formed using a predetermined metal material, In a tread surface view, the position in the tire circumferential direction is set so as to repeatedly change between one side in the tire circumferential direction and the other side in the tire circumferential direction with respect to a straight line along the tire width direction, The cap belt is provided on the outer side of the crossing belt in the tire radial direction, A predetermined gap is provided between the cap belt and the reinforcement belt in the tire width direction, The carcass has a folded portion folded outward in the tire width direction, A folded end, which is an outer end in the tire width direction of the folded portion, is covered by the cap belt and is positioned outer in the vehicle width direction than the gap.

2. The tire according to claim 1 , wherein the reinforcing cord is provided so as to have a repeating wave shape in a surface view of the tread.

3. The tire according to claim 1 , wherein the reinforcing cords are provided so as to repeat rectangular shapes in a surface view of the tread.

4. 4. The tire according to claim 1, wherein the amplitude of the reinforcing cord in the tire circumferential direction is 10 mm or less.

Images