tire

Abstract

To provide a tire in which a spiral belt and an RFID tag are arranged outside in a tire radial direction of a crown part of a tire skeleton member, in which the width of the spiral belt with respect to the crown part is secured.SOLUTION: A tire comprises: an annular tire skeleton member which comprises a bead part, a side part leading to outside in a tire radial direction of the bead part and a crown part leading to inside in a tire width direction of the side part; a spiral belt, arranged outside in the tire radial direction of the crown part, which is formed by winding a resin-coated cord having one or a plurality of reinforcement cords coated with a resin, spirally in a tire circumferential direction; and an RFID tag, arranged outside in the tire radial direction of the crown part, at least a portion of which is arranged on the extension line of the resin-coated cord extending from one end part of the resin-coated cord in a planar view.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a tire.

Background Art

[0002] A tire incorporating an RFID tag having an RFID chip and an antenna is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, a tire is known in which a spiral belt in which a resin-coated cord is spirally wound in the tire circumferential direction is disposed on the outer side in the tire radial direction of the crown portion of a tire skeletal member. When an RFID tag is disposed on such a tire, the RFID tag is disposed on the crown portion and on the side of the end of the resin-coated cord from the viewpoint of preventing damage to the RFID tag. However, when securing the arrangement space for the RFID tag, the width of the spiral belt with respect to the crown portion becomes narrow by the amount of the arrangement space for the RFID tag.

[0005] An object of the present disclosure is to secure the width of a spiral belt with respect to a crown portion in a tire in which a spiral belt and an RFID tag are disposed on the outer side in the tire radial direction of the crown portion of a tire skeletal member.

Means for Solving the Problems

[0006] The tire according to the first aspect of the present disclosure includes an annular tire skeletal member having a bead portion, a side portion continuous with the outer side in the tire radial direction of the bead portion, and a crown portion continuous with the inner side in the tire width direction of the side portion, a spiral belt disposed on the outer side in the tire radial direction of the crown portion and formed by spirally winding a coated cord in which one or a plurality of reinforcing cords are coated with resin or rubber in the tire circumferential direction, and an RFID tag disposed on the outer side in the tire radial direction of the crown portion and at least partially disposed on an extension line of the coated cord extending from one end portion of the coated cord in a plan view.

[0007] In the tire according to the first aspect, since at least a part of the RFID tag is disposed on the extension line of the coated cord extending from one end portion of the coated cord in a plan view, for example, compared with the case where the RFID tag is disposed on the side of one end portion of the coated cord, the width of the spiral belt with respect to the crown portion can be ensured.

[0008] The tire according to the second aspect of the present disclosure is the tire according to the first aspect, wherein the coated cord is formed by coating the reinforcing cord with resin.

[0009] In the tire according to the second aspect, since the reinforcing cord is coated with resin, the weight of the tire can be reduced.

[0010] The tire according to the third aspect of the present disclosure is the tire according to the first aspect or the second aspect, wherein the RFID tag is close to one end portion of the coated cord.

[0011] In the tire according to the third aspect, since the RFID tag is close to one end portion of the coated cord, for example, compared with the case where the RFID tag is away from one end portion of the coated cord, the width of the spiral belt with respect to the crown portion can be ensured.

[0012] The tire according to the fourth aspect of the present disclosure is the tire according to any one of the first aspect to the third aspect, wherein in a plan view, the RFID tag is disposed such that the longitudinal direction of the RFID tag is along the extension line.

[0013] In the tire according to the fourth aspect, since the RFID tag is arranged such that the longitudinal direction of the RFID tag is along the extension line in a plan view, for example, compared with the case where the RFID tag is arranged such that the longitudinal direction of the RFID tag is orthogonal to the extension line, the width of the spiral belt with respect to the crown portion can be secured.

[0014] In the tire according to the fifth aspect of the present disclosure, in the tire according to any one of the first aspect to the fourth aspect, in a plan view, the RFID tag and the other end portion of the covering cord overlap in the tire circumferential direction.

[0015] In the tire according to the fifth aspect, since the RFID tag and the other end portion of the covering cord overlap in the tire circumferential direction in a plan view, for example, compared with the case where one end portion of the covering cord and the RFID tag and the other end portion of the covering cord do not overlap, the rigidity of the spiral belt can be secured.

[0016] In the tire according to the sixth aspect of the present disclosure, in the tire according to any one of the first aspect to the fifth aspect, the tire skeleton member is formed of a resin material.

[0017] In the tire according to the sixth aspect, since the tire skeleton member is formed of a resin material, the weight of the tire can be reduced.

[0018] In the tire according to the seventh aspect of the present disclosure, in the tire according to the sixth aspect, the RFID tag includes a flexible resin case, an RFID chip and an antenna housed in the case, and the case is welded to the crown portion.

[0019] In the tire according to the seventh aspect, since the case housing the RFID chip and the antenna is welded to the crown portion, the RFID tag can be easily and firmly attached to the tire skeleton member.

Advantages of the Invention

[0020] According to the present disclosure, in a tire in which a spiral belt and an RFID tag are disposed on the outer side in the tire radial direction of the crown portion of the tire skeletal member, the width of the spiral belt with respect to the crown portion can be ensured.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0022] Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. Components denoted by the same reference numerals in each drawing mean the same or similar components. In the embodiments described below, redundant descriptions and reference numerals may be omitted. Also, the drawings used in the following description are all schematic, and the dimensional relationships between the respective elements shown in the drawings, the ratios of the respective elements, etc. do not necessarily match the actual ones. Also, the dimensional relationships between the respective elements and the ratios of the respective elements do not necessarily match even between multiple drawings.

[0023] Also, in the drawings, arrow TC indicates the tire circumferential direction, arrow TW indicates the tire width direction, and arrow TR indicates the tire radial direction. Also, hereinafter, the side closer to the tire rotation axis along the tire radial direction will be referred to as the "inner side in the tire radial direction", and the side farther from the tire rotation axis along the tire radial direction will be referred to as the "outer side in the tire radial direction". On the other hand, the side closer to the tire equatorial plane CL along the tire width direction will be referred to as the "inner side in the tire width direction", and the side farther from the tire equatorial plane CL along the tire width direction will be referred to as the "outer side in the tire width direction". Note that the method for measuring the dimensions of each part is based on the method described in the 2023 edition YEAR BOOK issued by JATMA (Japan Automobile Tire Manufacturers Association).

[0024] As shown in FIG. 1, the tire 10 of the present embodiment is a pneumatic tire filled with air inside and has a cross-sectional shape substantially the same as that of a conventional general rubber pneumatic tire (hereinafter, appropriately referred to as a "rubber tire").

[0025] (Tire Skeletal Member) The tire 10 of the present embodiment has an annular and resin-made tire skeletal member 17 that forms the skeletal part of the tire 10. The tire skeletal member 17 of the present embodiment is formed by joining a pair of tire halves 17A made of a resin material with a joining member 17B at the tire equatorial plane CL.

[0026] The tire skeletal member 17 includes a pair of bead portions 12 arranged at intervals in the tire width direction, a side portion 14 continuous with the outside in the tire radial direction of the bead portion 12, and a crown portion 16 continuous with the inside in the tire width direction of the side portion 14 and connecting the outer ends in the tire radial direction of the respective side portions 14. Note that the circumferential direction, width direction, and radial direction of the tire skeletal member 17 correspond to the tire circumferential direction, tire axial direction, and tire radial direction, respectively.

[0027] The tire skeletal member 17 is formed mainly from a resin material. This resin material does not contain vulcanized rubber. Examples of the resin material include thermoplastic resins (including thermoplastic elastomers), thermosetting resins, and other general-purpose resins, as well as engineering plastics (including super engineering plastics).

[0028] The thermoplastic resin (including thermoplastic elastomers) refers to a polymer compound that softens, flows, and becomes relatively hard and strong when cooled as the temperature rises. In this specification, among these, a polymer compound that softens, flows, and becomes relatively hard and strong when cooled as the temperature rises and has rubber-like elasticity is defined as a thermoplastic elastomer, and a polymer compound that softens, flows, and becomes relatively hard and strong when cooled as the temperature rises but does not have rubber-like elasticity is defined as a non-elastomeric thermoplastic resin for distinction.

[0029] Examples of the thermoplastic resin (including thermoplastic elastomers) include polyolefin-based thermoplastic elastomers (TPO), polystyrene-based thermoplastic elastomers (TPS), polyamide-based thermoplastic elastomers (TPA), polyurethane-based thermoplastic elastomers (TPU), polyester-based thermoplastic elastomers (TPC), and dynamically crosslinked thermoplastic elastomers (TPV), as well as polyolefin-based thermoplastic resins, polystyrene-based thermoplastic resins, polyamide-based thermoplastic resins, and polyester-based thermoplastic resins.

[0030] In addition, as the above-mentioned thermoplastic material, for example, those having a deflection temperature under load (at a load of 0.45 MPa) defined in ISO 75-2 or ASTM D648 of 78°C or higher, a tensile yield strength defined in JIS K7113 of 10 MPa or higher, a tensile fracture elongation also defined in JIS K7113 of 50% or higher, and a Vicat softening temperature (Method A) defined in JIS K7206 of 130°C can be used.

[0031] A thermosetting resin refers to a polymer compound that forms a three-dimensional network structure and cures as the temperature rises. Examples of thermosetting resins include phenolic resins, epoxy resins, melamine resins, urea resins, and the like.

[0032] In addition to the aforementioned thermoplastic resins (including thermoplastic elastomers) and thermosetting resins, general-purpose resins such as (meth)acrylic resins, EVA resins, vinyl chloride resins, fluorine-based resins, and silicone-based resins may also be used as the resin material.

[0033] Note that the tire carcass member 17 may be formed of a single resin material or may be formed of resin materials having different characteristics for each part (such as the bead part 12, the side part 14, the crown part 16, etc.) of the tire carcass member 17.

[0034] The bead part 12 is a part that fits onto the standard rim via the covering rubber 24, and an annular bead core 18 extending along the tire circumferential direction is embedded inside. The bead core 18 is composed of a bead cord (not shown) such as a metal cord (for example, a steel cord), an organic fiber cord, an organic fiber cord coated with resin, or a hard resin. Regarding the bead core 18, it may be omitted as long as the rigidity of the bead part 12 can be sufficiently ensured.

[0035] As shown in FIG. 1, the side part 14 is a part that constitutes the side portion of the tire 10, and is gently curved so as to protrude outward in the tire width direction from the bead part 12 toward the crown part 16.

[0036] The crown portion 16 is a part that supports a tread 32, which will be described later, provided on the outer side in the tire radial direction, and the outer surface 16A is substantially flat along the tire width direction.

[0037] (Spiral belt) A spiral belt 29 is provided on the outer side in the tire radial direction of the crown portion 16. This spiral belt 29 is formed by spirally winding a resin-coated cord 28 (an example of a coated cord in the present disclosure), which is obtained by coating one or a plurality of reinforcing cords 26 with a resin 27, in the tire circumferential direction. In the present embodiment, the spiral belt 29 is formed by a resin-coated cord 28 obtained by coating one reinforcing cord 26 with a resin 27, but the present disclosure is not limited to this configuration.

[0038] (Reinforcing layer) A reinforcing layer 30 is disposed on the outer surface of the tire skeletal member 17. The reinforcing layer 30 extends from the inner side in the tire radial direction of the bead core 18 toward the outer side in the tire radial direction along the outer surface of the tire skeletal member 17, and further extends to the inner side in the tire radial direction of the bead core 18 on the opposite side beyond the tire equatorial plane CL.

[0039] The reinforcing layer 30 includes a plurality of reinforcing cords (not shown) covered with rubber (not shown). The reinforcing cords of the reinforcing layer 30 are monofilaments (single wires) of organic fibers or multifilaments (twisted wires) obtained by twisting organic fibers, and each extends in the radial direction and is arranged in parallel in the tire circumferential direction. Note that the reinforcing cords of the reinforcing layer 30 may be inclined at an angle within 10° with respect to the tire radial direction in a side view of the tire.

[0040] The reinforcing layer 30 of the present embodiment is formed by attaching a ply 30L and a ply 30R, which will be described later, in which a plurality of reinforcing cords arranged in parallel with each other are covered with rubber (unvulcanized), to the outer peripheral surface of the formed tire skeletal member 17. Specifically, at least the outer surface 14A of the side portion 14 is covered by the reinforcing layer 30.

[0041] As an example of the reinforcing cords of the reinforcing layer 30, polyester cords, nylon cords, PET cords, aromatic polyamide cords, etc. can be used. Note that as the material of the reinforcing cords of the reinforcing layer 30, a metal such as steel may be used. Note that the reinforcing layer 30 may be formed by coating the reinforcing cords with a resin instead of rubber.

[0042] (Tread) On the outer side in the tire radial direction of the reinforcing layer 30, a rubber tread 32 is disposed. This tread 32 covers the outer portion of the reinforcing layer 30 in the tire radial direction. The rubber material constituting the tread 32 is the same as the tread rubber of a conventional ordinary pneumatic tire or the tread rubber for a retread tire. Further, a tread pattern (not shown) is formed on the ground contact surface with the road surface of the tread 32.

[0043] (Covering rubber) As shown in FIGS. 1 and 2, covering rubber 24 is provided on the outer surface of the reinforcing layer 30 attached to the tire skeletal member 17, extending from the outer surface 14A on the outer side of the tire of the side portion 14 to the inner surface 12B on the inner side of the tire of the bead portion 12. Specifically, the covering rubber 24 is folded back from the outer surface 14A of the side portion 14, via the outer surface 12A of the bead portion 12, to the inner surface 12B side of the bead portion 12.

[0044] The outer end portion on the outer side in the tire radial direction of the covering rubber 24 is joined (vulcanization-bonded) to the tread 32 and the tire skeletal member 17 while being sandwiched between the reinforcing layer 30 attached to the tire skeletal member 17 and the outer end portion on the outer side in the tire width direction of the tread 32. Note that in the present embodiment, the entire outer surface of the reinforcing layer 30 attached to the tire skeletal member 17 is covered by the tread 32 and the covering rubber 24.

[0045] As the rubber material constituting the covering rubber 24, a rubber material having higher weather resistance and sealing property with the standard rim than the tire skeletal member 17 is used. The rubber material constituting the covering rubber 24 is the same as the rubber material used for the sidewall and the bead portion of a conventional ordinary rubber pneumatic tire.

[0046] (RFID tag) As shown in FIGS. 2 and 3, the tire 10 has an RFID tag 40. This RFID tag 40 is configured to be capable of wireless communication with a reader (not shown).

[0047] As shown in FIG. 3, the RFID tag 40 is disposed on the outer side in the tire radial direction of the crown portion 16. Specifically, the RFID tag 40 is attached to the outer surface 16A of the crown portion 16. In the present embodiment, as an example, the RFID tag 40 is welded to the outer surface 16A of the crown portion 16.

[0048] Also, as shown in FIG. 2, at least a part of the RFID tag 40 is disposed on an extension line 28EL of the resin-coated cord 28 extending from one end portion 28A of the resin-coated cord 28 in a plan view. Here, the extension line 28EL is a straight line obtained by extending a center line 28CL passing through the center of the resin-coated cord 28. Further, since the resin-coated cord 28 is wound in a spiral shape, the center line 28CL may be inclined at a slight angle with respect to the tire circumferential direction.

[0049] Also, the RFID tag 40 is close to one end portion 28A of the resin-coated cord 28 in a plan view. Here, the term "close" includes a state where the RFID tag 40 is in contact with the end face of the one end portion 28A of the resin-coated cord 28 and a state where a gap S between the end face of the one end portion 28A of the resin-coated cord 28 and the RFID tag 40 is 1 mm or less. In the present embodiment, as shown in FIG. 2, the RFID tag 40 is in contact with the end face of the one end portion 28A of the resin-coated cord 28 in a plan view. Note that a case 42 of the RFID tag 40 described later may be attached to a portion of the end face of the one end portion 28A of the resin-coated cord 28 that is made of the resin 27. As an example, the case 42 of the RFID tag 40 may be welded to a portion of the end face of the one end portion 28A of the resin-coated cord 28 that is made of the resin 27.

[0050] Also, the RFID tag 40 is disposed such that the longitudinal direction of the RFID tag 40 is along the extension line 28EL in a plan view.

[0051] As shown in FIGS. 4(A) and 4(B), the RFID tag 40 includes a flexible resin case 42, an RFID chip 44 and an antenna 46 housed in the case 42. In the present embodiment, a pair of antennas 46 extend from the RFID chip 44 in opposite directions. Specifically, the pair of antennas 46 extend in opposite directions along the longitudinal direction of the RFID tag 40. Further, in the present embodiment, the case 42 is formed of the same resin material as the resin material forming the crown portion 16 of the tire skeletal member 17. This case 42 is welded to the outer surface 16A of the crown portion 16 as described above. The case 42 of the present embodiment is plate-shaped and is a substantially square shape in which the short sides are curved in an arc shape in plan view, but the shape of the case 42 is not limited to this substantially square shape. Further, the case 42 may be formed, for example, in a film shape.

[0052] Next, the operation and effect of the present embodiment will be described. In the tire 10 of the present embodiment, at least a part of the RFID tag 40 is disposed on an extension line 28EL extending from one end portion 28A of the resin-coated cord 28 in a plan view of the spiral belt 29 shown in FIG. 2. By disposing the RFID tag 40 in this manner, the amount by which the RFID tag 40 protrudes outward in the tire width direction from one end portion 28A of the resin-coated cord 28 is reduced, so that the resin-coated cord 28 can be disposed closer to the end portion 16E in the tire width direction of the crown portion 16. Therefore, the tire 10 of the present embodiment can dispose the resin-coated cord 28 closer to the end portion 16E in the tire width direction of the crown portion 16 than, for example, when the RFID tag 40 is disposed on the side of the end portion of the resin-coated cord 28. Therefore, the width of the spiral belt 29 with respect to the crown portion 16 (that is, the width along the tire width direction) can be ensured. As a result, the tire 10 can improve the tire rigidity by the spiral belt 29 while disposing the RFID tag 40 on the crown portion 16.

[0053] In addition, in the present embodiment, the end portion 16E in the tire width direction of the crown portion 16 in the tire 10 is defined as the boundary (inflection point) between the substantially flat outer surface 16A of the crown portion 16 and the curved outer surface 14A of the side portion 14. However, the present disclosure is not limited to this configuration, and the end portion in the tire width direction of the crown portion may be set according to the specifications of the tire.

[0054] Also, in the tire 10 of the present embodiment, the RFID tag 40 is close to one end portion 28A of the resin-coated cord 28. That is, in the tire 10, the RFID tag 40 is arranged so as to be close to one end portion 28A of the resin-coated cord 28 in a plan view. Here, the distance from the side surface of the spiral belt 29 to the end portion 16E of the crown portion 16 (the distance along the tire width direction) becomes narrower from the tip of one end portion 28A of the resin-coated cord 28 over one circumference of the tire. Therefore, by arranging the RFID tag 40 on the extension line 28EL of one end portion 28A of the resin-coated cord 28 and close to the one end portion 28A, for example, compared with the case where the RFID tag 40 is arranged at a position away from one end portion 28A of the resin-coated cord 28, it becomes possible to arrange the resin-coated cord 28 closer to the end portion 16E of the crown portion 16. Thereby, the width of the spiral belt 29 with respect to the crown portion 16 can be further ensured.

[0055] Also, in the tire 10 of the present embodiment, since the RFID tag 40 is arranged such that the longitudinal direction of the RFID tag 40 is along the extension line 28EL in a plan view, for example, compared with the case where the RFID tag 40 is arranged such that the longitudinal direction of the RFID tag 40 is orthogonal to the extension line 28EL, the amount by which the RFID tag 40 protrudes outward in the tire width direction from one end portion 28A of the resin-coated cord 28 decreases. Therefore, it becomes possible to arrange the resin-coated cord 28 closer to the end portion 16E of the crown portion 16. Thereby, the width of the spiral belt 29 with respect to the crown portion 16 can be further ensured.

[0056] Also, in the tire 10 of the present embodiment, since the reinforcing cord 26 is coated with the resin 27, the weight of the tire can be reduced. Further, since the tire skeleton member 17 is formed of a resin material, the weight of the tire can be further reduced. Also, the recyclability of the spiral belt 29 and the tire skeleton member 17 is improved.

[0057] Also, in the tire 10 of the present embodiment, the RFID tag 40 can be easily and firmly attached to the tire skeleton member 17 by welding the case 42 that houses the RFID chip 44 and the antenna 46 to the crown portion 16 of the tire skeleton member 17.

[0058] Also, in the tire 10 of the present embodiment, by making the resin material forming the case 42 of the RFID tag 40 the same type as the resin material forming the tire skeleton member 17, for example, the case 42 can be more firmly attached to the crown portion 16 compared to a configuration using different types of materials.

[0059] [Other Embodiments] Although an example of the embodiment of the present disclosure has been described above, the embodiments of the present disclosure are not limited to the above, and it goes without saying that various modifications can be made without departing from the gist thereof. In the tire 10 of the foregoing embodiment, the RFID tag 40 is arranged such that the longitudinal direction of the RFID tag 40 is along the extension line 28EL. However, for example, as shown in FIG. 6, the RFID tag 40 may be arranged such that the longitudinal direction of the RFID tag 40 is oblique to the extension line 28EL. The inclination angle of the longitudinal direction of the RFID tag 40 with respect to the extension line 28EL is preferably within the range of ±15 degrees. Also, there may be a gap S between the RFID tag 40 and one end portion 28A of the resin-coated cord 28. This gap S is preferably 5 mm or less, and more preferably 3 mm or less.

[0060] In addition, in the tire 10 of the above-described embodiment, the RFID tag 40 is disposed on the extension line 28EL of one end portion 28A of the resin-coated cord 28. However, the present disclosure is not limited to this configuration, and in addition to the extension line 28EL of one end portion 28A of the resin-coated cord 28, it may be disposed on the extension line of the other end portion 28B of the resin-coated cord 28.

[0061] Further, in the tire 10 of the above-described embodiment, the RFID tag 40 is welded to the outer surface 16A of the crown portion 16. However, the present disclosure is not limited to this configuration, and a configuration may be adopted in which a part or all of the RFID tag 40 is housed in a recess (not shown) formed in the outer surface 16A of the crown portion 16. By housing the RFID tag 40 in the recess in this way, the amount by which the RFID tag 40 protrudes radially outward from the outer surface 16A of the crown portion 16 is reduced, and even if a crack or the like occurs in the tread 32, it is difficult for the influence of the crack to reach the RFID tag 40.

[0062] Moreover, in the tire 10 of the above-described embodiment, as shown in FIG. 1, one end portion 28A and the other end portion 28B of the resin-coated cord 28 overlap in the tire circumferential direction. However, the present disclosure is not limited to this configuration. For example, as shown in FIG. 5, one end portion 28A and the other end portion 28B of the resin-coated cord 28 do not overlap in the tire circumferential direction. Instead, the RFID tag 40 and the other end portion 28B of the resin-coated cord 28 may overlap in the tire circumferential direction. In FIG. 5, the region where one end portion 28A and the other end portion 28B of the resin-coated cord 28 overlap in the tire circumferential direction is indicated by the reference symbol OR. When the RFID tag 40 and the other end portion 28B of the resin-coated cord 28 overlap in the tire circumferential direction in this way, the narrow portion of the spiral belt 29, which becomes narrower when one end portion 28A and the other end portion 28B of the resin-coated cord 28 do not overlap, is reinforced by the RFID tag 40. Therefore, for example, compared with the case where it is not reinforced, the rigidity of the spiral belt 29 can be ensured.

[0063] In the above-described embodiment, the RFID tag 40 is welded to the outer surface 16A of the crown portion 16. However, the present disclosure is not limited to this configuration, and the RFID tag 40 may be adhered to the outer surface 16A of the crown portion 16 using an adhesive.

[0064] Furthermore, in the above-described embodiment, the resin material forming the case 42 and the resin material forming the crown portion 16 of the tire skeleton member 17 are the same type of resin material. However, the present disclosure is not limited to this configuration, and the resin material forming the case 42 and the resin material forming the crown portion 16 of the tire skeleton member 17 may be different types of resin materials.

[0065] Also, in the above-described embodiment, the reinforcing layer 30 is configured to include a plurality of reinforcing cords (not shown) covered with rubber (not shown). However, the present invention is not limited to this configuration. The reinforcing layer 30 may be configured to include a plurality of reinforcing cords (not shown) covered with a resin material (not shown).

[0066] Note that the RFID tag 40 may be attached to the outer surface 16A of the crown portion 16 after forming the spiral belt 29 on the tire skeleton member 17 during the manufacture of the tire 10, or may be attached to the outer surface 16A of the crown portion 16 before forming the spiral belt 29.

[0067] In the foregoing embodiments, the tire skeletal member 17 is made of a resin material, but the present disclosure is not limited to this configuration. For example, like the tire 100 shown in FIGS. 7 and 8, the tire skeletal member may be formed of a material containing vulcanized rubber. Specifically, the tire 100 is, for example, a so-called radial tire used for a passenger car, and includes a tire skeletal member 117, a spiral belt 126, and an RFID tag 40. FIG. 7 shows the shape of the tire 100 in a natural state before inflation. The tire skeletal member 117 includes a bead portion 120, a side portion 122, and a crown portion 124. The tire skeletal member 117 is configured to include a carcass 116 composed of vulcanized rubber and a reinforcing cord, and an annular base ring 138 formed of a resin material. Note that the crown portion 124 of the tire skeletal member 117 is composed of a central portion of the carcass 116 and a base ring 138 disposed on the outer periphery of the central portion. In the tire 100, an end portion 138E on the outer side in the tire width direction of the base ring 138 corresponds to an end portion on the outer side in the tire width direction of the crown portion 124, and the outer surface of the base ring 138 corresponds to the outer surface of the crown portion 124. As the resin material constituting the base ring 138, the same resin material as the resin 132 of the spiral belt 126 may be used. The spiral belt 126 is attached (welded as an example) to the outer surface of the base ring 138. As shown in FIG. 7, the spiral belt 126 is formed by winding resin-coated cords 134 (an example of the coated cords of the present disclosure) in which a plurality of (for example, two) reinforcing cords 130 are coated with resin 132 in the tire circumferential direction. Note that the material constituting the spiral belt 126 may be the same as the material constituting the spiral belt 29. As shown in FIG. 8, the RFID tag 40 is disposed on an extension line 134EL of one end portion 134A of the resin-coated cord 134. The RFID tag 40 is attached to the base ring 138 constituting the crown portion 124. A tread 136 made of a rubber material is disposed on the outer side in the tire radial direction of the spiral belt 126. Although the tire skeletal member 117 of the tire 100 is formed of a material containing vulcanized rubber, the same operational effects as those of the tire 10 in the foregoing embodiments in which the tire skeletal member 17 is formed of only a resin material can be obtained.Note that reference numeral 134B indicates the other end of the resin-coated cord 134.

[0068] In the tire 10 of the above-described embodiment, a resin-coated cord 28 in which one or a plurality of reinforcing cords 26 are coated with a resin 27 is spirally wound in the tire circumferential direction to form a spiral belt 29, but the present disclosure is not limited to this configuration. For example, a rubber-coated cord (not shown) in which one or a plurality of reinforcing cords 26 are coated with rubber may be spirally wound in the tire circumferential direction to form a spiral belt (not shown). Even in this case, the same operational effects as those of the above-described tire 10 can be obtained. Further, the configuration using a rubber-coated cord instead of the resin-coated cord may be applied to the above-described tire 100.

Explanation of Reference Numerals

[0069] 10... Tire, 12... Bead portion, 14... Side portion, 16... Crown portion, 17... Tire skeleton member, 26... Reinforcing cord, 27... Resin, 28... Resin-coated cord (an example of a coated cord), 28A... One end portion, 28B... The other end portion, 28EL... Extension line, 29... Spiral belt, 40... RFID tag, 42... Case, 44... Chip, 46... Antenna, 100... Tire, 117... Tire skeleton member, 120... Bead portion, 122... Side portion, 124... Crown portion, 126... Spiral belt, 130... Reinforcing cord, 132... Resin, 134... Resin-coated cord (an example of a coated cord), 134A... One end portion, 134B... The other end portion, 134EL... Extension line, 138... Base ring, TC... Tire circumferential direction, TR... Tire radial direction, TW... Tire width direction.

Claims

1. An annular tire skeletal member including a bead portion, a side portion continuous with the outer side in the tire radial direction of the bead portion, and a crown portion continuous with the inner side in the tire width direction of the side portion; A spiral belt disposed on the outer side in the tire radial direction of the crown portion and formed by spirally winding a coated cord in which one or a plurality of reinforcing cords are coated with resin or rubber in the tire circumferential direction; An RFID tag disposed on the outer side in the tire radial direction of the crown portion and at least partially disposed on an extension line of the coated cord extending from one end portion of the coated cord in a plan view; A tire having the above.

2. The tire according to claim 1, wherein the coated cord is formed by coating the reinforcing cord with resin.

3. The tire according to claim 1, wherein the RFID tag is close to one end portion of the coated cord.

4. The tire according to claim 1, wherein in a plan view, the longitudinal direction of the RFID tag is arranged along the extension line.

5. The tire according to claim 1, wherein in a plan view, the RFID tag and the other end portion of the coated cord overlap in the tire circumferential direction.

6. The tire according to any one of claims 1 to 5, wherein the tire skeletal member is formed of a resin material.

7. The RFID tag includes a flexible resin case, an RFID chip and an antenna accommodated in the case, The tire according to claim 6, wherein the case is welded to the crown portion.

Images