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 uniformity is suppressed from deteriorating.SOLUTION: A tire comprises: an annular tire skeleton member which comprises a bead part, a side part leading to outside in the tire radial direction of the bead part and a crown part leading to inside in the 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 coated cord having one or a plurality of reinforcement cords coated with a resin or rubber, spirally in a tire circumferential direction; and an RFID tag arranged in a second segmented region positioned at the opposite side in the tire radial direction with respect to a first segmented region including a region where one end part of the coated cord overlaps with the other end part thereof in the tire circumferential direction, of segmented regions where the tire skeleton member is segmented into four, outside in the tire radial direction of the crown part.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a tire.

Background Art

[0002] A tire incorporating an RFID tag including 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 the tire skeleton member. In such a tire, the spiral belt is formed by overlapping the start end portion and the end end portion of the resin-coated cord in the tire circumferential direction. However, in the spiral belt, in the region where the start end portion and the end end portion of the resin-coated cord are overlapped in the tire circumferential direction, the belt width becomes wider than other regions where they are not overlapped, that is, the number of resin-coated cords increases, resulting in an increase in weight. If there is a region where the weight increases in the tire circumferential direction in the spiral belt like this, there is a risk that the uniformity of the tire may decrease.

[0005] An object of the present disclosure is to suppress a decrease in uniformity 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 skeleton 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 formed by spirally winding a coated cord, which is disposed on the outer side in the tire radial direction of the crown portion and 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 in a second divided region located on the opposite side in the tire radial direction with respect to a first divided region including a region where one end portion and the other end portion of the coated cord overlap in the tire circumferential direction among the divided regions that divide the tire skeletal member into four in the tire circumferential direction.

[0007] In the tire according to the first aspect, among the divided regions that divide the tire skeletal member into four in the tire circumferential direction, the RFID tag is disposed in a second divided region located on the opposite side in the tire radial direction with respect to a first divided region including a region where one end portion and the other end portion of the coated cord overlap in the tire circumferential direction. Therefore, in the above tire, for example, compared with the case where the RFID tag is disposed in the first divided region, the weight difference between the first divided region and the second divided region is reduced, and a decrease in uniformity is suppressed.

[0008] The tire according to the second aspect of the present disclosure is the tire according to the first aspect, wherein the RFID tag is a region corresponding to a first circumferential region as a region where one end portion and the other end portion of the coated cord overlap in the tire circumferential direction, and at least a part of the RFID tag is disposed in a second circumferential region located on the opposite side in the tire radial direction with respect to the first circumferential region.

[0009] In the tire according to the second aspect, at least a part of the RFID tag is disposed in a second circumferential region located on the opposite side in the tire radial direction with respect to a first circumferential region where one end portion and the other end portion of the coated cord overlap in the tire circumferential direction. Therefore, in the above tire, for example, compared with the case where at least a part of the RFID tag is disposed in the first circumferential region, the weight difference between the first circumferential region and the second circumferential region is reduced, and a decrease in uniformity is suppressed.

[0010] In the tire according to the third aspect of the present disclosure, in the tire according to the second aspect, the entire RFID tag is disposed in the second circumferential direction region.

[0011] In the tire according to the third aspect, since the entire RFID tag is disposed in the second circumferential direction region, the weight difference between the first circumferential direction region and the second circumferential direction region can be further reduced.

[0012] In the tire according to the fourth aspect of the present disclosure, in the tire according to any one of the first to third aspects, the RFID tag is disposed on the side of the spiral belt.

[0013] In the tire according to the fourth aspect, since the RFID tag is disposed on the side of the spiral belt, for example, compared with the case where the RFID tag is disposed between the spiral belt and the crown portion, the RFID tag is not covered by the spiral belt, so that a decrease in the reception sensitivity of the RFID tag is suppressed.

[0014] In the tire according to the fifth aspect of the present disclosure, in the tire according to any one of the first to fourth aspects, the covering cord is formed by covering the reinforcing cord with resin.

[0015] In the tire according to the fifth aspect, since the reinforcing cord is covered with resin, it is possible to reduce the tire weight.

[0016] In the tire according to the sixth aspect of the present disclosure, in the tire according to any one of the first to fifth aspects, 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, it is possible to reduce the tire weight.

[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 accommodating 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 arranged on the outer side in the tire radial direction of the crown portion of the tire skeleton member, it is possible to suppress a decrease in uniformity.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode 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. In addition, 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 a plurality of drawings.

[0023] 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 described 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 described 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 described 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 described 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 Skeleton Member) The tire 10 of the present embodiment has an annular resin-made tire skeleton member 17 that forms the skeleton portion of the tire 10. The tire skeleton member 17 of the present embodiment is formed by joining a pair of tire halves 17A made of a resin material at the joint 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. In addition, the circumferential direction, width direction, and radial direction of the tire skeletal member 17 respectively correspond to the tire circumferential direction, tire axial direction, and tire radial direction.

[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 thermoplastic resin that is not an elastomer, and they are distinguished.

[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) specified in ISO 75-2 or ASTM D648 of 78°C or higher, a tensile yield strength specified in JIS K7113 of 10 MPa or higher, a tensile fracture elongation also specified in JIS K7113 of 50% or higher, and a Vicat softening temperature (Method A) specified 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 above-mentioned 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 for 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 part 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 part 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 part 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 filaments) of organic fibers or multifilaments (twisted filaments) twisted from 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 plies 30L and 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 part 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 one in which the reinforcing cords are coated 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. 3 and 4, 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. 4, 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. 5, the RFID tag 40 is located on the second divided region DR2, which is on the opposite side in the tire radial direction with respect to the first divided region DR1 including a region (a first circumferential region CR1 described later) where one end portion 28A and the other end portion 28B of the resin-coated cord 28 overlap in the tire circumferential direction, among the divided regions DR that divide the tire skeletal member 17 into four in the tire circumferential direction. Specifically, as shown in FIG. 2, the RFID tag 40 is disposed at least partially in a region corresponding to the first circumferential region CR1 where one end portion 28A and the other end portion 28B of the resin-coated cord 28 overlap in the tire circumferential direction and located on the opposite side in the tire radial direction with respect to the first circumferential region CR1. More specifically, as shown in FIG. 5, the second circumferential region CR2 is located on the opposite side in the tire radial direction with respect to the first circumferential region CR1. And the circumferential length of the first circumferential region CR1 is the same as the circumferential length of the second circumferential region CR2, and the first circumferential region CR1 corresponds to the second circumferential region CR2. Also, in the present embodiment, as shown in FIG. 3, the entire RFID tag 40 is disposed in the second circumferential region CR2. It should be noted that the present disclosure is not limited to this configuration, and a part of the RFID tag 40 may extend out of the second circumferential region CR2. In the present embodiment, as an example, the center of the first circumferential region CR1 in the tire circumferential direction coincides with the center of the first divided region DR1 in the tire circumferential direction.

[0049] Also, as shown in FIGS. 3 and 4, the RFID tag 40 is disposed on the side of the spiral belt 29 (outer side in the tire width direction). Specifically, the RFID tag 40 is disposed between the end portion 16E in the tire width direction of the crown portion 16 and the side surface of the spiral belt 29. And the RFID tag 40 is disposed along the side surface of the spiral belt 29. Note that the RFID tag 40 may be in contact with the side surface of the spiral belt 29 or may be separated from the side surface of the spiral belt 29. Also, the RFID tag 40 may be fixed to the side surface of the spiral belt 29 by an adhesive or welding.

[0050] In this embodiment, the RFID 40 is disposed on the left side in FIG. 3 on the side of the spiral belt 29, but the present disclosure is not limited to this configuration. The RFID 40 may also be disposed on the right side in FIG. 3.

[0051] In this 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, but 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.

[0052] As shown in FIGS. 6(A) and 6(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 this embodiment, a pair of antennas 46 extend from the RFID chip 44 in opposite directions to each other. Specifically, the pair of antennas 46 extend in opposite directions to each other along the longitudinal direction of the RFID tag 40. Also, in this embodiment, the case 42 is formed of the same resin material as the resin material forming the crown portion 16 of the tire skeleton member 17. This case 42 is welded to the outer surface 16A of the crown portion 16 as described above. The case 42 of this embodiment is plate-shaped and is a substantially rectangular shape with a short side curved in an arc shape in plan view, but the shape of the case 42 is not limited to this substantially rectangular shape. Also, the case 42 may be formed, for example, in a film shape.

[0053] Next, the operation and effect of this embodiment will be described. In the tire 10 of this embodiment, among the divided regions DR that divide the tire skeletal member 17 into four in the tire circumferential direction, the RFID tag 40 is disposed in the second divided region DR2 located on the opposite side in the tire radial direction with respect to the first divided region DR1 including the first circumferential region CR1 where one end portion 28A and the other end portion 28B of the resin-coated cord 28 overlap in the tire circumferential direction. By disposing the RFID tag 40 in this manner, the weight of the second divided region DR2 increases, and the weight difference between the first divided region DR1 including the first circumferential region CR1 where the weight is increased more than other regions in the spiral belt 29 and the second divided region DR2 becomes smaller. For this reason, in the tire 10, for example, compared with the case where the RFID tag 40 is disposed in the first divided region DR1, the weight difference between the first divided region DR1 and the second divided region DR2 becomes smaller, and the decrease in uniformity is suppressed. Particularly, in the tire 10 of this embodiment, at least a part of the RFID tag 40 is disposed in the second circumferential region CR2 in a plan view of the spiral belt 29 shown in FIG. 3. By disposing the RFID tag 40 in this manner, the weight of the second circumferential region CR2 increases, and the weight difference between the first circumferential region CR1 where the weight is increased more than other regions in the spiral belt 29 and the second circumferential region CR2 becomes smaller. For this reason, in the tire 10, for example, compared with the case where at least a part of the RFID tag 40 is disposed in the first divided region DR1 including the first circumferential region CR1, the weight difference between the first circumferential region CR1 and the second circumferential region CR2 becomes smaller, and the decrease in uniformity is suppressed.

[0054] Further, in the tire 10 of this embodiment, since the entire RFID tag 40 is disposed in the second circumferential region CR2, the weight difference between the first circumferential region CR1 and the second circumferential region CR2 can be further reduced.

[0055] Also, in the tire 10 of the present embodiment, since the RFID tag 40 is disposed on the side of the spiral belt 29, for example, compared with the case where the RFID tag 40 is disposed between the spiral belt 29 and the crown portion 16, the RFID tag 40 is not covered by the spiral belt 29, so that a decrease in the reception sensitivity of the RFID tag 40 is suppressed.

[0056] Also, in the tire 10 of the present embodiment, since the reinforcing cord 26 is coated with the resin 27, the tire weight can be reduced. Further, since the tire skeleton member 17 is formed of a resin material, the tire weight 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, 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, the RFID tag 40 can be easily and firmly attached to 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, compared with a configuration using different types, the case 42 can be firmly attached to the crown portion 16.

[0059] [Other Embodiments] As described above, an example of the embodiment of the present disclosure has been described. However, 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 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 manner, the amount by which the RFID tag 40 protrudes radially outward of the tire 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 crack to reach the RFID tag 40.

[0060] In the tire 10 of the foregoing embodiment, the RFID tag 40 is arranged along the side surface of the spiral belt 29. However, the present disclosure is not limited to this configuration. For example, as shown in FIG. 7, the RFID tag 40 may be arranged obliquely with respect to the side surface of the spiral belt 29. Specifically, in plan view, the longitudinal direction of the RFID tag 40 is arranged obliquely with respect to the side surface of the spiral belt 29. Even in this case, the same operational effects as those of the foregoing tire 10 can be achieved.

[0061] Also, in the foregoing 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.

[0062] Furthermore, in the foregoing 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.

[0063] Also, in the foregoing 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).

[0064] 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.

[0065] 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. 8 and 9, 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. 8 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. 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, the end portion 138E on the outer side in the tire width direction of the base ring 138 corresponds to the 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, a resin material of the same type 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. 8, the spiral belt 126 is formed by winding a resin-coated cord 134 (an example of the coated cord of the present disclosure) in which a plurality of (for example, two) reinforcing cords 130 are coated with a resin 132 in the tire circumferential direction. The material constituting the spiral belt 126 may be the same as the material constituting the spiral belt 29. As shown in FIG. 9, the RFID tag 40 is located on the second divided region on the opposite side in the tire radial direction with respect to the first divided region including a region (a first circumferential direction region (not shown) described later) where one end portion (not shown) and the other end portion (not shown) of the resin-coated cord 134 overlap in the tire circumferential direction among the divided regions (not shown) that divide the tire skeletal member 117 into four in the tire circumferential direction.Specifically, the RFID tag 40 is located in a region corresponding to a first circumferential region where one end and the other end of the resin-coated cord 134 overlap in the tire circumferential direction, and at least a part of the RFID tag 40 is disposed in a second circumferential region located on the opposite side in the tire radial direction with respect to the first circumferential region. The RFID tag 40 is attached to the base ring 138 that constitutes 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. The tire 100 has a tire skeleton member 117 formed of a material containing vulcanized rubber, and can obtain the same operational effects as the tire 10 of the foregoing embodiment in which the tire skeleton member 17 is formed of only a resin material.

[0066] In the tire 10 of the foregoing embodiment, the spiral belt 29 is formed by spirally winding a resin-coated cord 28 obtained by coating one or more reinforcing cords 26 with a resin 27 in the tire circumferential direction. However, the present disclosure is not limited to this configuration. For example, a rubber-coated cord (not shown) obtained by coating one or more reinforcing cords 26 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 foregoing tire 10 can be obtained. Further, the configuration using a rubber-coated cord instead of the resin-coated cord may be applied to the foregoing tire 100.

Explanation of Reference Numerals

[0067] 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, 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), 138... Base ring, DR... Division region, DR1... First division region, DR2... Second division region, CR1... First circumferential direction region, CR2... Second circumferential direction region, 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 outside in the tire radial direction of the bead portion, and a crown portion continuous with the inside in the tire width direction of the side portion; A spiral belt disposed on the outside 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 opposite side in the tire radial direction to a first divided region including a region where one end portion and the other end portion of the coated cord overlap in the tire circumferential direction among divided regions that divide the tire skeletal member into four in the tire circumferential direction; A tire having the above.

2. The RFID tag is a region corresponding to a first circumferential direction region as a region where one end portion and the other end portion of the coated cord overlap in the tire circumferential direction, and at least a part thereof is disposed in a second circumferential direction region located on the opposite side in the tire radial direction to the first circumferential direction region. The tire according to Claim 1.

3. The entire RFID tag is disposed in the second circumferential direction region. The tire according to Claim 2.

4. The RFID tag is disposed on the side of the spiral belt. The tire according to Claim 1.

5. The coated cord is formed by coating the reinforcing cord with resin. The tire according to Claim 1.

6. The tire skeletal member is formed of a resin material. The tire according to any one of Claims 1 to 5.

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

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