tire

Abstract

To provide a tire having an RFID tag which suppresses damage of the RFID tag.SOLUTION: A tire has: a carcass straddling between one bead part and the other bead part; a belt 26 which is arranged outside in a tire radial direction of the carcass, and is formed by spirally winding a resin-coated cord 34 constituted by coating a plurality of reinforcement cords 30 with a resin 32 in a tire circumferential direction; a resin-made base ring 38 which is arranged between the carcass and the belt, and extends in the tire circumferential direction; and an RFID tag 40 attached to the base ring.SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] 2. Description of the Related Art Tires having built-in RFID tags each equipped with an RFID chip and an antenna are known (see, for example, Patent Document 1).

[0003] In Patent Document 1, an RFID tag is disposed at a position spaced apart on the outer side of the tire from a carcass that forms the framework of the tire. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2011-256557 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the tire disclosed in Patent Document 1, the RFID tag is disposed on the tire side, specifically, at a position spaced apart from the carcass on the outer side of the tire, so that a force (tensile force) acts on the RFID tag located on the outer side of the carcass due to deformation of the tire side when the tire touches the ground. If an excessive force (tensile force) acts on the RFID tag, there is a risk that the RFID tag will be damaged.

[0006] An object of the present invention is to prevent damage to an RFID tag in a tire having an RFID tag. [Means for solving the problem]

[0007] A tire of a first aspect of the present invention includes a carcass spanning from one bead portion to the other bead portion, a belt disposed radially outside the carcass and formed by spirally winding a resin-coated cord formed by coating a plurality of reinforcing cords with resin in the circumferential direction of the tire, a resin base ring disposed between the carcass and the belt and extending in the circumferential direction of the tire, and an RFID tag attached to the base ring.

[0008] In the tire of the first embodiment, the RFID tag is attached to a resin base ring disposed between the carcass and the belt. In other words, the RFID tag is attached to the base ring disposed in the tire crown. In this way, in the tire, the RFID tag is disposed in the tire crown, so that the force acting on the RFID tag due to deformation when the tire comes into contact with the ground is smaller than that of a tire in which the RFID tag is disposed in the tire side. Furthermore, in the above tire, since the RFID tag is attached to the base ring, the force acting on the RFID tag due to deformation when the tire comes into contact with the ground is smaller than, for example, a tire in which the RFID tag is located at a position away from the carcass on the outside of the tire.

[0009] Therefore, in the tire of the first aspect, the force acting on the RFID tag is smaller than in a tire in which the above-mentioned RFID tag is provided in the tire side portion, and therefore damage to the RFID tag can be suppressed.

[0010] A second aspect of the tire of the present invention is the tire of the first aspect, wherein the tire width direction outer end of the base ring is positioned more outward in the tire width direction than the tire width direction outer end of the belt, and the RFID tag is arranged in the region of the base ring between the tire width direction outer end of the base ring and the tire width direction outer end of the belt.

[0011] In the tire of the second aspect, the RFID tag is disposed in a region of the base ring between an outer end of the base ring in the tire width direction and an outer end of the belt in the tire width direction. That is, in the tire, the RFID tag is not covered by the belt. Therefore, in the tire, the receiving sensitivity of the RFID tag is improved compared to, for example, a configuration in which the RFID tag is covered by the belt.

[0012] A tire of a third aspect of the present invention is the tire of the first or second aspect, wherein the RFID tag is disposed on a portion of the base ring opposite to the carcass.

[0013] In the tire of the third aspect, the RFID tag is disposed on the side of the base ring opposite the carcass. That is, in the tire, the RFID tag is separated from the carcass. Therefore, in the tire, the reception sensitivity of the RFID tag is improved compared to, for example, a configuration in which the RFID tag is in close contact with the carcass. Also, since the RFID tag is separated from the carcass, heat during tire vulcanization is less likely to be transmitted from the carcass to the RFID tag. Therefore, damage to the RFID tag due to heat during tire vulcanization is suppressed.

[0014] A tire of a fourth aspect of the present invention is the tire of the first or second aspect, wherein the RFID tag is disposed in a portion of the base ring on the carcass side.

[0015] In the tire of the fourth aspect, the RFID tag is disposed on the carcass side of the base ring, so that defects such as cracks in the tread are unlikely to reach the RFID tag, and damage to the RFID tag is suppressed for a long period of time.

[0016] A tire according to a fifth aspect of the present invention is the tire according to the first or second aspect, wherein the RFID tag is embedded in the base ring.

[0017] In the tire of the fifth aspect, since the RFID tag is embedded in the base ring, defects such as cracks in the tread are less likely to reach the RFID tag. Also, in the tire, the rigidity of the base ring in the tire circumferential direction can be made more uniform than in a tire in which the RFID tag protrudes from the base ring.

[0018] A sixth aspect of the tire of the present invention is a tire according to any one of the first to fifth aspects, wherein the RFID tag comprises a flexible resin case, and an RFID chip and an antenna housed in the case, and the case is welded to the base ring.

[0019] In the tire of the sixth aspect, the RFID tag can be easily incorporated by welding the case that houses the RFID chip and the antenna to the base ring. In addition, since the case is welded to the base ring, the case is attached to the base ring more simply and firmly than, for example, a configuration in which the case is bonded to the base ring with an adhesive.

[0020] A seventh aspect of the present invention relates to the tire of the sixth aspect, wherein the case is formed from the same type of resin material as the resin material forming the base ring.

[0021] In the tire of the seventh embodiment, the resin material forming the RFID tag case is the same as the resin material forming the base ring, so that the case can be more firmly fixed to the base ring than, for example, a configuration in which the materials are different.

[0022] A tire according to an eighth aspect of the present invention is the tire according to the sixth or seventh aspect, wherein the base ring is formed with an accommodating recess for accommodating at least a portion of the case.

[0023] In the tire of the eighth embodiment, the accommodating recess formed in the base ring is used to position the case relative to the base ring, making it easy to position the RFID tag (case). Also, in the tire, since at least a part of the case is accommodated in the accommodating recess, the amount of protrusion of the case from the outer circumferential surface of the base ring is reduced, for example, compared to a configuration in which the case is disposed on the outer circumferential surface of the base ring.

[0024] A ninth aspect of the present invention relates to the tire of any one of the sixth to eighth aspects, wherein the antenna extends in the tire circumferential direction.

[0025] In the tire of the ninth embodiment, the antenna of the RFID tag extends circumferentially around the tire. This prevents the antenna from being pulled and coming off the RFID chip due to deformation when the tire comes into contact with the ground, compared to a configuration in which, for example, the antenna extends along the side portion from the bead side toward the crown side. Effect of the Invention

[0026] According to the present invention, in a tire having an RFID tag, damage to the RFID tag can be suppressed. [Brief description of the drawings]

[0027] [Figure 1] 1 is a cross-sectional view showing one side of a cross section taken along the tire width direction of a tire according to one embodiment of the present invention. [Diagram 2] 2 is an enlarged view of a portion indicated by an arrow 2X in FIG. [Diagram 3] FIG. 3 is a plan view of the portion shown in FIG. 2 as viewed from the outside of the tire. [Figure 4] 4(A) is a plan view of an RFID tag included in the tire of FIG 1. FIG 4(B) is a side view of the RFID tag of FIG 4(A). [Diagram 5] 3 is an enlarged view (enlarged view corresponding to FIG. 2) of a main part in a cross section along the tire width direction of a tire according to another embodiment of the present invention. [Figure 6]3 is an enlarged view (enlarged view corresponding to FIG. 2) of a main part in a cross section along the tire width direction of a tire according to another embodiment of the present invention. [Figure 7] 3 is an enlarged view (enlarged view corresponding to FIG. 2) of a main part in a cross section along the tire width direction of a tire according to another embodiment of the present invention. [Figure 8] FIG. 8 is a plan view of the part shown in FIG. 7 as seen from outside the tire. [Figure 9] 3 is an enlarged view (enlarged view corresponding to FIG. 2) of a main part in a cross section along the tire width direction of a tire according to another embodiment of the present invention. [Figure 10] 3 is an enlarged view (enlarged view corresponding to FIG. 2) of a main part in a cross section along the tire width direction of a tire according to another embodiment of the present invention. [Figure 11] 3 is an enlarged view (enlarged view corresponding to FIG. 2) of a main part in a cross section along the tire width direction of a tire according to another embodiment of the present invention. [Figure 12] FIG. 12 is a plan view of the part shown in FIG. 11 as viewed from the outside of the tire. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Components indicated by the same reference numerals in each drawing are the same or similar components. Note that duplicated descriptions and reference numerals in the embodiments described below may be omitted. In addition, all drawings used in the following description are schematic, and the dimensional relationship of each element, the ratio of each element, etc. shown in the drawings do not necessarily match the actual ones. In addition, the dimensional relationship of each element, the ratio of each element, etc. between multiple drawings do not necessarily match.

[0029] In the drawings, the arrow TC indicates the tire circumferential direction, the arrow TW indicates the tire width direction, and the arrow TR indicates the tire radial direction. Here, the tire radial direction means a direction perpendicular to the tire rotation axis (not shown). The tire width direction means a direction parallel to the tire rotation axis (arrow X direction). The tire width direction can also be referred to as the tire axial direction. In the following, the side closer to the tire rotation axis along the tire radial direction is referred to as the "tire radial inner side", and the side farther from the tire rotation axis along the tire radial direction is referred to as the "tire radial outer side". Meanwhile, the side closer to the tire equatorial plane CL along the tire width direction is referred to as the "tire width inner side", and the side farther from the tire equatorial plane CL along the tire width direction is referred to as the "tire width outer side".

[0030] The method for measuring the dimensions of each part is based on the method described in the 2021 edition of the YEAR BOOK published by JATMA (Japan Automobile Tire Manufacturers Association). If TRA or ETRTO standards are applicable in the place of use or manufacture, follow the respective standards.

[0031] In Fig. 1, a tire 10 according to this embodiment is, for example, a so-called radial tire used for passenger cars, and includes a carcass 16, a belt 26, a base ring 38, and an RFID tag 40. Fig. 1 shows the shape of the tire 10 in its natural state before being filled with air.

[0032] (Carcass) The carcass 16 spans from one bead portion 20 to the other bead portion 20. The carcass 16 is composed of, for example, one carcass ply 14. Note that in the pair of bead portions 20, bead cores 12 are embedded, respectively.

[0033] The carcass ply 14 is formed by covering, with a coating rubber (not shown), a plurality of cords (not shown) extending in the radial direction of the tire 10. The material of the cords of the carcass ply 14 is, for example, PET, but may be other conventionally known materials.

[0034] An end portion of the carcass ply 14 in the tire width direction is folded back from the inner side in the tire radial direction to the outer side of the bead core 12. Of the carcass ply 14, a portion spanning from one bead core 12 to the other bead core 12 is called a main body portion 14A, and a portion folded back from the bead core 12 is called a folded back portion 14B.

[0035] A bead filler 18 having a thickness gradually decreasing from the bead core 12 toward the tire radially outward is disposed between the main body portion 14A and the folded-back portion 14B of the carcass ply 14. In the tire 10, a portion of the bead filler 18 extending from an outer end 18A in the tire radial direction to an inner side in the tire radial direction is defined as a bead portion 20.

[0036] An inner liner 22 made of rubber is disposed on the tire inner side of the carcass 16, and a side rubber layer 24 is disposed on the outer portion (outer portion) of the carcass 16 in the tire width direction. In other words, the outer portion of the carcass 16 in the tire width direction is covered with a rubber material.

[0037] In this embodiment, the bead core 12, the carcass 16, the bead filler 18, the inner liner 22, and the side rubber layer 24 form a tire case 25. In other words, the tire case 25 is a tire frame member that forms the frame of the tire 10.

[0038] (belt) A belt 26 is disposed on the outside of the crown portion of the carcass 16, in other words, on the outside in the tire radial direction of the carcass 16. This belt 26 is in close contact with the outer peripheral surface of a base ring 38 described below. As shown in Fig. 2, the belt 26 has a resin-coated cord 34 in which a plurality of (e.g., two) reinforcing cords 30 are coated with resin 32. This resin-coated cord 34 is wound around the outer periphery of the base ring 38 in the tire circumferential direction. Specifically, the resin-coated cord 34 is wound around the outer periphery of the carcass 16 in a spiral shape that turns around an axis along the tire axial direction.

[0039] The resins 32 of the resin-coated cord 34 adjacent to each other in the tire width direction are joined together to form the belt 26.

[0040] As described above, the resin-coated cord 34 is wound around the outer periphery of the carcass 16 in the tire circumferential direction, so that the multiple reinforcement cords 30 extend along the tire circumferential direction. That is, the multiple reinforcement cords 30 are arranged in a straight line when viewed in the tire radial direction. Furthermore, as shown in Fig. 2, the multiple reinforcement cords 30 are arranged side by side along the tire width direction in the tire width direction cross section.

[0041] It is preferable to use a reinforcing cord 30 that is thicker and has greater strength (tensile strength) than the cord of the carcass ply 14. The reinforcing cord 30 can be made of a monofilament (single wire) of metal fiber, organic fiber, or the like, or a multifilament (twisted wire) made of twisted wires using these fibers.

[0042] The resin 32 that covers the reinforcing cord 30 is made of a resin material having a higher tensile modulus than the rubber that constitutes the side rubber layer 24 and the rubber material that constitutes the tread 36, which will be described later. Elastic thermoplastic resin, thermoplastic elastomer (TPE), thermosetting resin, etc. can be used as the resin 32 that covers the reinforcing cord 30. Considering the elasticity during driving and moldability during manufacturing, it is preferable to use a thermoplastic elastomer.

[0043] Examples of thermoplastic elastomers include polyolefin thermoplastic elastomers (TPO), polystyrene thermoplastic elastomers (TPS), polyamide thermoplastic elastomers (TPA), polyurethane thermoplastic elastomers (TPU), polyester thermoplastic elastomers (TPC), and dynamically crosslinked thermoplastic elastomers (TPV).

[0044] Examples of the thermoplastic resin include polyurethane resin, polyolefin resin, vinyl chloride resin, polyamide resin, etc. Furthermore, the thermoplastic resin material may have a deflection temperature under load (at a load of 0.45 MPa) of 78°C or more as specified in ISO75-2 or ASTM D648, a tensile yield strength of 10 MPa or more as specified in JIS K7113, a tensile elongation at break of 50% or more as specified in JIS K7113, and a Vicat softening temperature (method A) of 130°C or more as specified in JIS K7206.

[0045] The tensile modulus of elasticity (defined in JIS K7113:1995) of the resin 32 covering the reinforcement cord 30 is preferably 50 MPa or more. The upper limit of the tensile modulus of elasticity of the resin 32 covering the reinforcement cord 30 is preferably 1000 MPa or less. The tensile modulus of elasticity of the resin 32 covering the reinforcement cord 30 is particularly preferably within the range of 200 to 700 MPa.

[0046] (Base Ring) As shown in FIG. 1 and FIG. 2, the base ring 38 is an annular resin member disposed between the carcass 16 and the belt 26 and extending in the tire circumferential direction. The base ring 38 is disposed in close contact with the crown portion of the carcass 16. An outer end 38A of the base ring 38 in the tire width direction is located outside the outer end 26A of the belt 26 in the tire width direction. That is, the width of the base ring 38 is wider than the width of the belt 26, and both end portions 38A of the base ring 38 in the tire width direction are located outside the outer end portions 26A of the belt 26 in the tire width direction. The resin material constituting the base ring 38 may be the same type of resin material as the resin 32 of the belt 26.

[0047] (RFID tag) As shown in FIG. 2 and FIG. 3, the RFID tag 40 is attached to the base ring 38. The RFID tag 40 is configured to be capable of wireless communication with a reader (not shown). The RFID tag 40 is disposed in a region 38R between an end 38A of the base ring 38 and an end 26A of the belt 26 in the base ring 38. The RFID tag 40 is disposed on the opposite side (tread 36 side) of the base ring 38 from the carcass 16. In other words, the RFID tag 40 is disposed on the outer periphery of the base ring 38. In this embodiment, the RFID tag 40 is attached to the outer periphery of the base ring 38. In this embodiment, the RFID tag 40 is disposed only in a region 38R on one side of the base ring 38 as shown in FIG. 1, but the present invention is not limited to this configuration, and the RFID tag 40 may be disposed in the regions 38R on both sides of the base ring 38.

[0048] As shown in FIG. 4(A) and FIG. 4(B), the RFID tag 40 includes a flexible resin case 42, and an RFID chip 44 and an antenna 46 housed in the case 42. In this embodiment, the pair of antennas 46 extend in opposite directions from the RFID chip 44. In this embodiment, the case 42 is made of the same resin material as the resin material forming the base ring 38. The case 42 is welded to the region 38R of the base ring 38. Specifically, the RFID tag 40 is welded to the outer peripheral surface of the base ring 38 corresponding to the region 38R. The case 42 in this embodiment is plate-shaped and has a substantially rectangular shape with short sides curved in an arc shape in a plan view, but the shape of the case 42 is not limited to this substantially rectangular shape. The case 42 may also be, for example, a film-shaped case.

[0049] In the tire 10 of this embodiment, the antenna 46 of the RFID tag 40 extends in the tire circumferential direction in a plan view as shown in Fig. 3. However, the present invention is not limited to this configuration, and the antenna 46 of the RFID tag 40 may extend in a direction inclined within a range of ±10 degrees with respect to the tire circumferential direction in a plan view.

[0050] As shown in Fig. 1, a tread 36 made of a rubber material is disposed on the outer side of the belt 26 in the tire radial direction. The rubber material used for the tread 36 is a conventionally known material. The tread 36 has drainage grooves 37 formed therein. The pattern of the tread 36 is also a conventionally known material.

[0051] (action) Next, the operation of this embodiment will be described. In the tire 10 of this embodiment, the RFID tag 40 is attached to a resin base ring 38 that is disposed between the carcass 16 and the belt 26. In other words, the RFID tag 40 is attached to the base ring 38 that is disposed in the tire crown portion. In this way, in the tire 10, since the RFID tag 40 is disposed in the tire crown portion, the force acting on the RFID tag 40 due to deformation when the tire comes into contact with the ground is smaller than, for example, a tire in which the RFID tag 40 is disposed in the tire side portion. Furthermore, in the tire 10, since the RFID tag 40 is attached to the base ring 38, the force acting on the RFID tag 40 due to deformation when the tire touches the ground is smaller than, for example, a tire in which the RFID tag 40 is positioned at a position away from the carcass 16 on the outside of the tire.

[0052] Therefore, in the tire 10 of the present embodiment, the force acting on the RFID tag 40 is smaller than in a tire in which the RFID tag 40 is provided in the tire side portion, and therefore damage to the RFID tag 40 can be suppressed.

[0053] In the tire 10 of the present embodiment, the RFID tag 40 is disposed in the region 38R of the base ring 38. That is, in the tire 10, the RFID tag 40 is not covered by the belt 26. Therefore, in the tire 10, the receiving sensitivity of the RFID tag 40 is improved compared to, for example, a configuration in which the RFID tag 40 is covered by the belt 26.

[0054] In the tire 10 of this embodiment, the RFID tag 40 is disposed on a portion of the base ring 38 opposite the carcass 16. That is, in the tire 10, the RFID tag 40 is separated from the carcass 16. Therefore, in the tire 10, the receiving sensitivity of the RFID tag 40 is improved compared to a configuration in which the RFID tag 40 is in close contact with the carcass 16. Also, since the RFID tag 40 is separated from the carcass 16, heat during tire vulcanization is less likely to be transmitted from the carcass 16 to the RFID tag 40. This prevents the RFID tag 40 from being damaged by heat during tire vulcanization.

[0055] In the tire 10 of the present embodiment, the RFID tag 40 can be easily incorporated by welding the case 42, which houses the RFID chip 44 and the antenna 46, to the base ring 38. Furthermore, because the case 42 is welded to the base ring 38, the case 42 is attached to the base ring 38 more simply and firmly than, for example, a configuration in which the case 42 is bonded to the base ring 38 with an adhesive.

[0056] In the tire 10 of this embodiment, the resin material forming the case 42 of the RFID tag 40 is the same type as the resin material forming the base ring 38, so that the case 42 can be firmly fixed to the base ring 38 compared to, for example, a configuration in which the resin materials are different.

[0057] In the tire 10 of this embodiment, the antenna 46 of the RFID tag 40 extends in the tire circumferential direction. Therefore, compared to a configuration in which, for example, the antenna 46 extends along the tire side portion from the bead portion 20 side toward the tire crown portion side, the antenna 46 is prevented from being pulled and coming off the RFID chip 44 due to deformation when the tire comes into contact with the ground.

[0058] [Other embodiments] An example of an embodiment of the present invention has been described above, but the embodiment of the present invention is not limited to the above, and it goes without saying that various modifications can be made without departing from the spirit and scope of the present invention. 5, one half of the case 42 in the thickness direction may be embedded in the inner periphery of the base ring 38. An accommodating recess 38B for accommodating at least a part of the case 42 of the RFID tag 40 described later may be formed in the inner periphery corresponding to the region 38R of the base ring 38. Also, for example, as in a tire 52 shown in FIG. 6, the RFID tag 40 may be embedded in the base ring 38. Specifically, the RFID tag 40 is embedded in the base ring 38 so as not to protrude from the base ring 38. For example, a storage recess 38B in which the entire case 42 of the RFID tag 40 described later is stored may be formed in the outer periphery corresponding to the region 38R of the base ring 38, and the RFID tag 40 may be stored in this storage recess 38B. Also, the RFID tag 40 may be embedded when the base ring 38 is molded. By embedding the RFID tag 40 in the base ring 38 in this way, defects such as cracks occurring in the tread 36 are less likely to reach the RFID tag 40. Furthermore, in the tire 10, for example, the rigidity of the base ring 38 in the tire circumferential direction can be made closer to uniform compared to a tire in which the RFID tag 40 protrudes from the base ring 38. Furthermore, a decrease in the amount of rubber in the portion of the tread 36 corresponding to the region 38R of the base ring 38 is suppressed, and input to the RFID tag 40 during tire running can be mitigated. When the accommodating recess 38B is formed in the base ring 38, the case 42 (RFID tag 40) can be easily positioned relative to the base ring 38.

[0059] In the above-described embodiment, the antenna 46 of the RFID tag 40 extends in the tire circumferential direction, but the present invention is not limited to this configuration. For example, as in a tire 54 shown in Figures 7 and 8, the RFID tag 40 may be attached to the base ring 38 so that the antenna 46 extends in the tire width direction.

[0060] In the above-described embodiment, the antenna 46 of the RFID tag 40 extends in the tire circumferential direction, but the present invention is not limited to this configuration. For example, as in a tire 54 shown in Figures 7 and 8, the RFID tag 40 may be attached to the base ring 38 so that the antenna 46 extends in the tire width direction.

[0061] In the above-described embodiment, the RFID tag 40 is disposed on the outer periphery of the base ring 38, but the present invention is not limited to this configuration. For example, as in a tire 56 shown in FIG. 9, the RFID tag 40 may be disposed on the portion of the base ring 38 on the carcass 16 side (in other words, on the inner periphery of the base ring 38). When the RFID tag 40 is disposed on the inner periphery of the base ring 38 in this manner, defects such as cracks occurring in the tread 36 are less likely to reach the RFID tag 40. This prevents damage to the RFID tag 40 over a long period of time.

[0062] In the above embodiment, the width of the base ring 38 is wider than the width of the belt 26, but the present invention is not limited to this configuration. For example, as in a tire 58 shown in FIG. 10, a pair of base rings 59 narrower than the belt 26 may be arranged around the end of the belt 26. As shown in FIG. 10, the base ring 59 is arranged between the belt 26 and the carcass 16 so as to straddle the belt 26 in the tire width direction. In addition, the RFID tag 40 is arranged in a region 59R of the base ring 59 between an end 59A of the base ring 59 on the outer side in the tire width direction and the end 26A of the belt 26. In the tire 58, a storage recess 59B for the RFID tag 40 is formed in the region 59R of the base ring 59, and the RFID tag 40 is embedded (stored) in the storage recess 59B.

[0063] In the above-described embodiment, the antennas 46 of the RFID tag 40 extend from the RFID chip 44 in opposite directions, but the present invention is not limited to this configuration. For example, as in a tire 60 shown in Figures 11 and 12, the antenna 46 of the RFID tag 40 may extend from the RFID chip 44 to only one side (the outer side in the tire width direction in Figure 12). With such a configuration, the size of the case 42 of the RFID tag 40 can be made compact.

[0064] Furthermore, in the above-described embodiment, the case 42 of the RFID tag 40 is welded to the base ring 38, but the present invention is not limited to this configuration, and the case 42 may be adhered to the base ring 38 with an adhesive.

[0065] Furthermore, in the above-described embodiment, the resin material forming the case 42 and the resin material forming the base ring 38 are the same type of resin material, but the present invention is not limited to this configuration, and the resin material forming the case 42 and the resin material forming the base ring 38 may be different types of resin materials.

[0066] In the above-described embodiment, the antenna 46 of the RFID tag 40 extends in the tire circumferential direction or the tire width direction, but the present invention is not limited to this configuration. For example, the antenna 46 may meander in a wave-like shape (e.g., a triangular wave or a sine wave) with respect to the direction in which the antenna 46 extends. [Explanation of symbols]

[0067] 10... tire, 16... carcass, 20... bead portion, 38... base ring, 40... RFID tag, 42... case, 44... RFID chip, 46... antenna, 50, 52, 54, 56, 58, 60... tire, 59... base ring, 59R... area.

Claims

1. a carcass extending from one bead portion to the other bead portion; a belt disposed on an outer side of the carcass in a tire radial direction and formed by winding a resin-coated cord formed by coating a plurality of reinforcing cords with resin in a spiral shape in a tire circumferential direction; a resin base ring disposed between the carcass and the belt and extending in a tire circumferential direction; an RFID tag attached to the base ring; A tire having the above structure.

2. An outer end portion of the base ring in the tire width direction is located outer in the tire width direction than an outer end portion of the belt in the tire width direction, The tire according to claim 1 , wherein the RFID tag is disposed in a region of the base ring between an outer end of the base ring in the tire width direction and an outer end of the belt in the tire width direction.

3. The tire according to claim 1 or 2, wherein the RFID tag is disposed on a portion of the base ring opposite to the carcass.

4. The tire according to claim 1 or 2, wherein the RFID tag is disposed on a portion of the base ring on the carcass side.

5. The tire according to claim 1 or 2, wherein the RFID tag is embedded in the base ring.

6. The RFID tag includes a flexible resin case, and an RFID chip and an antenna housed in the case, The tire according to any one of claims 1 to 5, wherein the case is welded to the base ring.

7. The tire according to claim 6 , wherein the case is made of the same type of resin material as that of the base ring.

8. The tire according to claim 6 or 7, wherein the base ring has an accommodating recess for accommodating at least a portion of the case.

9. The tire according to any one of claims 6 to 8, wherein the antenna extends in a tire circumferential direction.

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