Tire
The RF tag known in the art incorporated in a tire has a problem that it can easily get distorted when the stresses occurring in the running tire converge on its vicinity. The present invention provides a tire ( 1 ) configured to prevent distortion from occurring in the RF tag ( 50 ) incorporated therein. The tire ( 1 ) includes an RF tag structure ( 50 A) which is constructed of the RF tag ( 50 ) covered with a coating rubber ( 51 ). The modulus of elasticity of the coating rubber ( 51 ) is higher than that of the rubbers of the adjacent members ( 13, 32 ) located adjacently on the respective axial sides of the coating rubber ( 51 ).
1. A tire incorporating an RF tag structure, the RF tag structure comprising:
an RF tag; and
a coating rubber covering the RF tag,
wherein a modulus of elasticity of the coating rubber covering the RF tag is higher than a modulus of elasticity of rubbers of adjacent members located adjacently on respective axial sides of the coating rubber, the RF tag being so located that it does not come in contact with a stiffener which reinforces a bead of the tire on a bead side, and the RF tag being located between a maximum width position of the tire and a rim flange parting point.
2. The tire according to claim 1 , wherein an axial inner portion of the coating rubber is adjacently located on a ply end reinforcing rubber being a rubber material in the axial inner portion amongst the adjacent members.
3. The tire according to claim 1 , wherein an axial outer portion of the coating rubber contacts with a side rubber being an outer surface of a wide wall, amongst the adjacent members.
4. The tire according to claim 2 , wherein an axial outer portion of the coating rubber contacts with a side rubber being an outer surface of a wide wall, amongst the adjacent members.
5. The tire according to claim 2 , wherein a length of the ply end reinforcing rubber in a tire radial direction is shorter than a length of the stiffener in the tire radial direction, the stiffener extending in the tire radial direction along with a body of carcass ply.
6. The tire according to claim 1 , wherein the coating rubber is so shaped in a cross section of the tire as to taper off at ends in a tire radial direction.
7. The tire according to claim 2 , wherein the coating rubber is so shaped in a cross section of the tire as to taper off at ends in a tire radial direction.
8. The tire according to claim 3 , wherein the coating rubber is so shaped in a cross section of the tire as to taper off at ends in a tire radial direction.
9. The tire according to claim 1 , volume of an axial inner portion of the coating rubber differs from volume of an axial outer portion of the coating rubber, as a border being an axial center line passing through a center of the RF tag in a tire axial direction.
10. The tire according to claim 2 , volume of the axial inner portion of the coating rubber differs from volume of an axial outer portion of the coating rubber, as a border being an axial center line passing through a center of the RF tag in a tire axial direction.
11. The tire according to claim 9 , an adjacent member with lower rubber hardness amongst the adjacent members, which are located adjacently on the respective axial sides of the coating rubber, is placed adjacently to a portion of the coating rubber whose volume is smaller.
12. The tire according to claim 10 , an adjacent member with lower rubber hardness amongst the adjacent members, which are located adjacently on the respective axial sides of the coating rubber, is placed adjacent to a portion of the coating rubber whose volume is smaller.
13. The tire according to claim 1 , wherein the modulus of elasticity of the coating rubber covering the RF tag is 10% or more higher than the modulus of elasticity of the rubbers of the adjacent members located adjacently on the respective axial sides of the coating rubber.
14. The tire according to claim 2 , wherein the modulus of elasticity of the coating rubber covering the RF tag is 10% or more higher than the modulus of elasticity of the rubbers of the adjacent members located adjacently on the respective axial sides of the coating rubber.
15. The tire according to claim 1 , wherein the modulus of elasticity of the coating rubber covering the RF tag is lower than the modulus of elasticity of the material whose modulus of elasticity is the highest of constituting materials of the RF tag in contact with the coating rubber.
16. The tire according to claim 2 , wherein the modulus of elasticity of the coating rubber covering the RF tag is lower than the modulus of elasticity of the material whose modulus of elasticity is the highest of the constituting materials of the RF tag in contact with the coating rubber.
17. The tire according to claim 1 , a length of the coating rubber covering the RF tag in the tire radial direction is shorter than a length of the adjacent members in a tire radial direction.
18. The tire according to claim 2 , a length of the coating rubber covering the RF tag in a tire radial direction is shorter than a length of the adjacent members in a tire radial direction.
19. The tire according to claim 1 , wherein the modulus of elasticity of the coating rubber covering the RF tag is 1.5 times or more higher than the modulus of elasticity of rubber of at least one of the adjacent members located adjacently on the respective axial sides of the coating rubber.
20. The tire according to claim 2 , wherein the modulus of elasticity of the coating rubber covering the RF tag is 1.5 times or more higher than the modulus of elasticity of rubber of at least one of the adjacent members located adjacently on the respective axial sides of the coating rubber.