Pneumatic tires and the use of a mounting surface assembly for a pneumatic tire

Abstract

Pneumatic tires (1), comprising: a rubber layer (130) of the inner tire surface, forming a tire inner surface; and an electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1), wherein at least a part of the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) is arranged on an inner cavity side of the rubber layer (130) of the inner surface of the tire, wherein the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) comprises a knitted fabric (50) which includes a yarn, wherein at least part of the yarn has electrical conductivity, wherein the knitted fabric (50) has elasticity, wherein the knitted fabric (50) is configured by mixing a yarn with electrical conductivity (511) and a yarn with electrical non-conductivity (611, 621), and wherein the knitted fabric (50) has in a top view: an electrically conductive section (51) corresponding to a range, which includes the electrically conductive yarn (511), and electrically non-conductive sections (61, 62) corresponding to an area that includes only the electrically non-conductive yarn (611, 621), wherein the electrically conductive section (51) is arranged between the non-electrically conductive sections (61, 62); an electrical device (7, 71, 72) which is provided in the tire (1), wherein the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) is electrically connected to the electrical device (7, 71, 72).

Description

Technical field

[0001] The present invention relates to a pneumatic tire and a mounting surface structure. State of the art

[0002] Wiring or an electrical component may be installed on the inner surface of a pneumatic tire. A technique for providing a sensor on the inner surface of the pneumatic tire is known (for example, patent document 1). In this technique, a conductor used as an antenna is provided inside the tire, and contactless communication is carried out between the sensor and a device outside the tire.

[0003] Furthermore, a technique is known in which a heating device is provided on an inner surface of a pneumatic tire (for example, patent document 2). In this technique, power is supplied to the heating device via an electrically conductive yarn that adheres to the inner surface of the tire.

[0004] WO 2018 011 001 A1 discloses a pneumatic tire 100 provided with an electrically conductive yarn 170, 200, 300, comprising a first yarn 262, 362 consisting of stainless steel fibers and a second yarn 264, 364 comprising organic fibers. The electrically conductive yarn 170, 200, 300 extends from a bead section 120 of the tire 100 through a carcass section 130 to a tread section 140 of the tire 100 (see paragraph 25). According to claim 1, the first yarn 170, 200, 300 and the second yarn 264, 364 are twisted or wired together, or the second yarn 264, 364 is wound around the first yarn 170, 200, 300.

[0005] DE 60 2004 007 607 T2 discloses a system with a tire 12 provided with an elongated antenna cable 32 having a conductive strand. The conductive strand comprises a metal strip 40, 42 made of conductive material, which surrounds an elongated strengthening element 36, 38. The elongated strengthening element 36, 38 is formed of non-conductive, stretchable or elastic material, which is surrounded by and attached to the metal strip 40, 42. Fig. 3, Fig. 4 to Fig. 5 The metal bands 40 and 42 are wrapped around the elongated strengthening element 38.

[0006] JP 2017 121 730 A discloses a bladder for tire vulcanization for pressing a tire onto a mold inner surface. The bladder is provided with a main section 2 comprising a rubber-elastic material and a heating element 3, which is attached to the main section 2 of the bladder and generates heat by the input of energy. The heating element 3 comprises a knitted part 8, which is knitted using an electric heating yarn 6, which includes a twisted wire formed by twisting together a plurality of thin metal threads, and a circumference of the twisted wire covered with an insulating layer of a synthetic resin (see paragraph 0019).

[0007] EP 3 181 340 A1 discloses a pneumatic tire 10 with a sealant component. The pneumatic tire 10 comprises a carcass ply 14, which is rubberized (see paragraph 36) and bonded to an inner coating 25. The pneumatic tire 10 further comprises a sealant component 101 made of sealant material 100, which is bonded to an inner surface of the inner coating 25. Fig. Figure 10 shows the sealant material 100 in detail. As shown from Fig. As can be seen from paragraph 10, it comprises a fabric 1001 with individual fibers (see paragraph 57). These fibers consist of (electrically conductive) carbon fibers, (non-electrically conductive) glass fibers or fibers made of a combination of these materials (see paragraph 56). List of literature on patent literature Patent Document 1: JP 2004-001716 A Patent Document 2: JP 2016-203829 A Brief description of the invention: Technical problem

[0008] With regard to laying wiring or installing an electrical component on the inner surface of the pneumatic tire, the technology described in patent document 1 has room for improvement with respect to a method for installing a conductor used as an antenna. Furthermore, the technology described in patent document 2 has room for improvement with respect to the installation of wiring through which power is supplied.

[0009] In view of the foregoing, it is an object of the present invention to provide a pneumatic tire and a mounting surface structure that makes it possible to install wiring and an electrical component in a suitable manner on the inner surface of the tire. Solution to the problem

[0010] To solve the problems and fulfill the above-described objective, a pneumatic tire according to one aspect of the present invention includes the following: a rubber layer of the inner tire surface enclosed within a tire inner surface, and an electrically conductive element, wherein at least a portion of the electrically conductive element is arranged on an inner cavity side of the rubber layer of the inner tire surface, and the electrically conductive element comprises a knitted fabric comprising a yarn, wherein at least a portion of the yarn has electrical conductivity, wherein the knitted fabric has extensibility, wherein the knitted fabric is configured by mixing a yarn with electrical conductivity and a yarn with electrical non-conductivity, and wherein the knitted fabric, in a top view, comprises: an electrically conductive section corresponding to an area enclosing the electrically conductive yarn,and electrically non-conductive sections corresponding to an area that includes only the electrically non-conductive yarn, wherein the electrically conductive section is arranged between the electrically non-conductive sections. Additionally, the pneumatic tire has an electrical device provided within the tire, wherein the electrically conductive element is electrically connected to the electrical device.

[0011] The electrically conductive element is electrically connected to an electrical device provided in the tire.

[0012] Preferably, the electrically conductive element is arranged so that it extends along the inner surface of the tire, and a direction in which the electrically conductive element extends is aligned with a direction in which the knitted fabric has extensibility.

[0013] The knitted fabric is configured by mixing a yarn with electrical conductivity and a yarn with electrical non-conductivity.

[0014] Preferably, the electrically conductive yarn has a color that differs from the color of the electrically non-conductive yarn.

[0015] Preferably, the rubber layer of the tire's inner surface is an inner liner layer, and at least a portion of the yarn forming the knit is partially embedded in the inner liner layer or a rubber layer arranged on the inner cavity side of the inner liner layer.

[0016] Preferably, the electrically conductive element includes a gap section formed between the yarns that form the knitted fabric, and the rubber layer of the tire's inner surface includes an exposed area on a surface of the knitted fabric through the gap section.

[0017] Preferably, the knitted fabric has an air permeability of 60 cm². 3 / cm 2 ·s or more.

[0018] Preferably, the pneumatic tire includes a plurality of electrically conductive elements, wherein each of the plurality of electrically conductive elements is electrically connected to an electrical device provided in the tire, and power is supplied to the electrical device via the electrically conductive element.

[0019] Preferably, the electrically conductive element is provided in a range of 40% or more and 70% or less of a tire's cross-sectional height.

[0020] The pneumatic tire may further include a rubber cover layer that is provided on an inner cavity side of the electrically conductive element and covers part of the electrically conductive element.

[0021] Preferably, the electrically conductive element on the inner surface of the tire extends beyond a bead section to at least a bead base section.

[0022] Preferably, the electrically conductive element electrically connects at least a part of an area between the electrical device provided in the tire and an electrode provided on a rim mounted on the tire.

[0023] Preferably, in the part of the area between the electrical device and the electrode, the electrically conductive element runs through a section of the inner tire cavity that is located away from the inner surface of the tire.

[0024] Preferably, the electrically conductive element is provided corresponding to each of a pair of bead base sections, the electrically conductive element is electrically connected to each of the electrodes that touch the pair of bead base sections and to the electrical device provided in the tire, and power is supplied to the electrical device via the electrically conductive element.

[0025] Preferably, a tensile force in a longitudinal direction of the electrically conductive element has a value per width of 0.01 N / mm or more and 1.0 N / mm or less.

[0026] Preferably, for the electrically conductive element, the ratio Imax / S of a maximum value Imax (A) of the transmitted current to a total cross-sectional area S (mm²) is 2) of the yarn with electrical conductivity 0.01 ≤ Imax / S ≤ 20, and a ratio Pmax / WH of a maximum value Pmax (W) of the transmitted power to a width WH (mm) orthogonal to a direction of the yarn with electrical conductivity is 0.01 ≤ Pmax / WH ≤ 2.

[0027] Preferably, the electrical device provided in the tire is arranged on the inner surface of the tire in an area other than a section directly below a circumferential groove or in an area from an end section of the inner surface of the tire to a position corresponding to 50% of the tire's cross-sectional height.

[0028] To solve the problems and achieve the above-described objective, a mounting surface structure according to one aspect of the present invention includes: an electrically conductive layer enclosing a knitted fabric configured by mixing an electrically conductive yarn and an electrically non-conductive yarn, wherein the knitted fabric has extensibility; and a rubber layer provided on at least one of a principal surface and another principal surface of the electrically conductive layer, wherein the mounting surface structure is configured by layers of the electrically conductive layer and the rubber layer.

[0029] Preferably, a 100% modulus in a state in which the electrically conductive layer is layered onto the rubber layer is 102% or more and 180% or less than a 100% modulus of the rubber layer alone. Advantageous effects of the invention

[0030] According to the pneumatic tire and the mounting surface structure according to an embodiment of the present invention, wiring and an electrical component can be suitably installed on the inner surface of the tire. Brief description of the drawings Fig. Figure 1 is a cross-sectional view in a tire meridional direction, showing a pneumatic tire according to an embodiment of the present invention. Fig. 2 is a top view showing a configuration example of a Fig. 1 illustrated electrically conductive element illustrated. Fig. Figure 3 is an enlarged view of electrically conductive sections and electrically non-conductive sections in Fig. 2. Fig. Figure 4 is a diagram illustrating an example of an adjustment range of an electrically conductive element. Fig. Figure 5 is a diagram of an area with a bending zone when viewed from one side of the inner tire cavity. Fig. Figure 6 is a diagram illustrating a state in which the tire is mounted on a rim. Fig. Figure 7 is a diagram illustrating an example of a path along which the electrically conductive element passes. Fig. Figure 8 is a diagram illustrating an example in which each of a pair of bead base sections is provided with a corresponding electrically conductive element. Fig. Figure 9 is a diagram illustrating an example of a placement area for an electrical device. Fig. Figure 10 is a diagram illustrating another example of the placement area for the electrical device. Fig. Figure 11 is a diagram illustrating a placement example of the electronic device. Fig. Figure 12 is a diagram illustrating a placement example of the electrical device. Fig. Figure 13 is a diagram illustrating a placement example of an electrically conductive element in relation to an inner surface of the tire. Fig. Figure 14 is a diagram illustrating an example of the placement of the electrically conductive element in relation to the inner surface of the tire. Fig. Figure 15 is a diagram illustrating an example of the placement of the electrically conductive element in relation to the inner surface of the tire. Fig. Figure 16 is a cross-sectional view illustrating a condition in which part of the electrically conductive section is embedded in rubber of an inner lining layer. Fig. Figure 17 is a cross-sectional view illustrating a condition in which part of the electrically conductive section is embedded in rubber of the inner core layer. Fig. Figure 18 is a top view showing a modified example of the electrically conductive element in Fig. 1 illustrates. Fig. Figure 19 is a top view showing a modified example of the electrically conductive element in Fig. 1 illustrates. Fig. Figure 20 is a top view showing a modified example of the electrically conductive element in Fig. 1 illustrates. Fig. Figure 21 is a top view showing a modified example of the electrically conductive element in Fig. 1 illustrates. Fig. Figure 22 is a top view showing a modified example of the electrically conductive element in Fig. 1 illustrates. Fig. Figure 23 is a visual appearance view illustrating an example of a mounting surface structure that can be used during the forming of the tire. Fig. Figure 24 is a visual appearance view illustrating an example of the mounting surface structure that can be used during the forming of the tire. Fig. Figure 25 is a visual appearance view illustrating an example of the mounting surface structure that can be used during the forming of the tire. Description of embodiments

[0031] Embodiments of the present invention are described in detail below with reference to the drawings. In the embodiments described below, components identical or substantially similar to those of other embodiments have identical reference numerals, and descriptions of these components are either simplified or omitted. The present invention is not limited by the embodiment. Components of the embodiments include elements that are substantially identical or that can be exchanged or easily devised by a person skilled in the art. It should be noted that the configurations described below can be combined as desired. Furthermore, various omissions, substitutions, and modifications to the configurations can be made within the scope of protection of the present invention. pneumatic tires

[0032] Fig. Figure 1 is a cross-sectional view in a tire meridional direction, showing a pneumatic tire according to an embodiment of the present invention. Fig. Figure 1 is a cross-sectional view of a half-area in a tire radial direction. Fig. Figure 1 also illustrates a radial tire for a passenger car as an example of a pneumatic tire.

[0033] In Fig. 1. “Cross-section in a tire meridian direction” refers to a cross-section of the tire along a plane that includes a tire rotation axis (not illustrated). The reference symbol CL denotes an equatorial plane of the tire and refers to a plane perpendicular to the tire rotation axis that passes through the center of the tire in the direction of the tire rotation axis. “Tire width direction” refers to the direction parallel to the tire rotation axis. “Tire radial direction” refers to the direction perpendicular to the tire rotation axis.

[0034] Furthermore, an inside and an outside in the vehicle width direction are defined when the tire is mounted on the vehicle. Additionally, a left and a right area, delimited by the equatorial plane of the tire CL, are defined as an outside area in the vehicle width direction and an inside area in the vehicle width direction. Furthermore, in a case where a tire mounting direction is specified with respect to the vehicle, a pneumatic tire 1 has a mounting direction indicator section (not shown) that indicates the tire mounting direction with respect to the vehicle. The mounting direction indicator section is, for example, composed of a marking or ridges / grooves on a sidewall section of the tire.For example, Regulation 30 of the Economic Commission for Europe (ECE R30) requires that the indication section for the mounting direction on the sidewall section on the outside in the vehicle width direction be provided when the tire is mounted on the vehicle.

[0035] The pneumatic tire 1 (which can simply be referred to as the tire) has a ring structure, the center of which is the tire rotation axis, and includes a pair of bead cores 11, 11, a pair of bead fillers 12, 12, a carcass layer 13, a belt layer 14, a tread rubber 15, a pair of sidewall rubbers 16, 16 and a pair of rim cushion rubbers 17, 17.

[0036] The pair of bead cores 11, 11 includes one or more bead wires made of steel, wound multiple times in a ring shape, and embedded in a bead section 10 to configure the core of the left and right bead sections 10. The pair of bead fillers 12, 12 is arranged on an outer circumference in the tire radial direction of the pair of bead cores 11, 11 to reinforce the bead sections 10.

[0037] The carcass layer 13 has a single-layer structure, consisting of a single carcass ply, or a multi-layer structure, consisting of multiple layered carcass plies, and extends between the left and right bead cores 11, 11 in a torus shape, thus forming the support structure for the tire. Furthermore, both end sections of the carcass layer 13 are bent back on one outer side in the tire width direction so that they are wrapped and fixed around the bead cores 11 and the bead fillers 12. The carcass layer 13 is manufactured by roller processing a multitude of carcass cord threads made of steel or an organic fiber material (e.g., aramid, nylon, polyester, rayon, or the like) and covered with a coating rubber.The carcass layup has a carcass angle (defined as an inclination angle of a longitudinal direction of the carcass cord threads relative to the tire circumferential direction) with an absolute value of 80 degrees or more to 90 degrees or less.

[0038] The belt layer 14 is a multi-layered structure comprising a pair of cross belts 141, 142 and a belt cover 143, and is arranged around the outer circumference of the carcass layer 13. The pair of cross belts 141, 142 are manufactured by roller processing a multitude of belt cord threads made of steel or an organic fiber material and covered with coating rubber. The cross belts 141, 142 have a belt angle ranging from 20 degrees to 55 degrees. Furthermore, the pair of cross belts 141, 142 exhibit belt angles (defined as the longitudinal inclination angles of the belt cord threads with respect to the tire circumference) of opposite signs, and the belts are layered such that the belt cord threads overlap longitudinally (a so-called cross-ply structure).Furthermore, the belt cover 143 is formed by covering belt cover cord threads made of steel or an organic fiber material with coating rubber. The belt cover 143 has a belt angle with an absolute value of 0 degrees or greater and 10 degrees or less. Additionally, the belt cover 143 is, for example, a strip material formed by coating one or a plurality of belt cord threads with coating rubber, wherein the strip material is wound multiple times spirally around the outer circumferential surfaces of the cross belts 141, 142 in the circumferential direction of the tire.

[0039] The pneumatic tire 1 has an inner liner 9 on one side of an inner cavity 30 of the carcass layer 13. The inner liner 9 is the inner surface of the tire, i.e., an inner circumferential surface of the carcass layer 13, and reaches each of the positions of the bead cores 11 of the pair of bead sections 10 at both end sections in the tire width direction, with the inner liner 9 being rolled and bonded in a torus-shaped form in the tire circumferential direction. The inner liner 9 suppresses permeation of air molecules to a tire exterior. The inner liner 9 is a rubber layer of the tire's inner surface. An inner surface of the inner liner 9 is a tire's inner surface. The inner liner 9 forms the tire's inner surface.

[0040] The tread rubber 15 is arranged around the circumference in the tire radial direction of the carcass layer 13 and the belt layer 14 and forms a tread section of a tire. The pair of sidewall rubbers 16, 16 are arranged on the outside in the tire width direction of the carcass layer 13 and form a left and a right sidewall section. The pair of rim cushion rubbers 17, 17 are arranged along the right and left bead core 11, 11 and the folded-over sections of the carcass layer 13 to form rim mating surfaces of the bead sections 10.

[0041] The bead section 10 includes a bead base section 19. The bead base section 19 is a surface on the inside of the bead section 10 in the tire radial direction and is inclined from the inside to the outside in the tire width direction with respect to the tire's axis of rotation in a direction that diverges to an outside in the tire radial direction. An end section on the inside of the bead base section 19 in the tire width direction is provided as a bead end 18, and the bead end 18 forms an innermost end of the bead section, corresponding to the innermost end section of the bead section 10 in the tire radial direction.

[0042] Furthermore, the pneumatic tire 1 includes in a tread surface a plurality of circumferential grooves 21 to 24 extending in the tire's circumferential direction; and a plurality of rib sections 31 to 35 defined by the plurality of main circumferential grooves 21 to 24. Electrically conductive element

[0043] As in Fig. As shown in Figure 1, the pneumatic tire 1 encloses an electrically conductive element 5 which is arranged on the inner surface of the tire. Fig. In Figure 1, the electrically conductive element 5 is arranged such that it runs along the inner surface of the tire in the radial direction. The electrically conductive element 5 comprises a yarn that has at least partial electrical conductivity and a knitted fabric that has elasticity. The electrically conductive element 5 can be provided on the inner surface of the tire 1 during or after the tire 1 has been formed.

[0044] Fig. 2 is a top view showing a configuration example of the in Fig. 1 illustrated electrically conductive element 5 illustrated. In Fig. 2. The longitudinal direction or orientation of the electrically conductive element 5 is defined as an X-direction, and the lateral direction of the electrically conductive element 5 is defined as a Y-direction. The Y-direction is a direction orthogonal to the X-direction.

[0045] In Fig. 2 includes the electrically conductive element 5, electrically conductive sections 51 and 52, and electrically non-conductive sections 61, 62, and 63. In Fig. In Figure 2, the electrically non-conductive section 61, the electrically conductive section 51, the electrically non-conductive section 62, the electrically conductive section 52, and the electrically non-conductive section 63 are arranged side by side in the Y direction. The electrically non-conductive section 61, the electrically conductive section 51, the electrically non-conductive section 62, the electrically conductive section 52, and the electrically non-conductive section 63 all extend in the X direction. Fig. Sections 51 and 52 are electrically conductive and contain an electrically conductive yarn. Sections 61, 62, and 63 are electrically non-conductive and contain only an electrically non-conductive yarn.

[0046] As in Fig. As illustrated in Figure 2, the electrically conductive section 51 is arranged between the electrically non-conductive section 61 and the electrically non-conductive section 62. The electrically conductive section 52 is arranged between the electrically non-conductive section 62 and the electrically non-conductive section 63. Thus, the Fig. The electrically conductive element 5 shown in Figure 2 is electrically isolated from the two electrically conductive sections 51 and 52 by the electrically non-conductive section 62. Since the electrically conductive section 51 is sandwiched between the electrically non-conductive section 61 and the electrically non-conductive section 62 in the Y-direction, the electrically conductive section 51 is electrically isolated from the other sections forming the tire 1 when the electrically conductive section 51 is located on the inner surface of the tire. Furthermore, since the electrically conductive section 52 is located between the electrically non-conductive section 62 and the electrically non-conductive section 63 in the Y-direction, the electrically conductive section 52 is electrically isolated from the other sections forming the tire 1 when the electrically conductive section 52 is located on the inner surface of the tire.The electrically conductive element 5 allows for the application of a power supply voltage. In other words, the power supply voltage can be applied by assigning the two electrically conductive sections 51 and 52 to a positive and a negative electrode, respectively.

[0047] Furthermore, the electrically non-conductive sections 61, 62, and 63 exhibit greater extensibility along the X-direction than the electrically conductive sections 51 and 52. This facilitates guidance when the electrically conductive element 5 is positioned on the inner surface of the tire 1. The use of the electrically conductive element 5 simplifies the process of positioning it along the inner surface of the tire 1. Knitted fabric of electrically conductive element

[0048] Fig. Figure 3 is an enlarged view of the electrically conductive section 51 and the electrically non-conductive sections 61 and 62 in Fig. 2. As in Fig. As illustrated in Figure 3, the electrically conductive element 5 includes the following: a knitted fabric 50 configured by mixing an electrically conductive yarn (hereinafter also referred to as the electrically conductive yarn) 511 and electrically non-conductive yarns (hereinafter also referred to as the electrically non-conductive yarns) 611 and 621. The knitted fabric 50 is a simple knitted fabric produced by knitting a mixture of the electrically conductive yarn 511 and the electrically non-conductive yarns 611 and 621 in an identical manner. The knitting of the in Fig. The knitted fabric 50 illustrated in Figure 3 is an example, and any other knitting method can be used as long as the knitted fabric exhibits stretchability along the X-direction. The X-direction is the direction in which the electrically conductive element 5 extends and in which the knitted fabric 50 is stretchable. Thus, the direction in which the electrically conductive element 5 extends is aligned with the direction in which the knitted fabric 50 is stretchable.

[0049] In a plan view, the knitted fabric 50 comprises: the electrically conductive section 51, corresponding to an area enclosing the electrically conductive yarn 511; and an electrically non-conductive section enclosing only the electrically non-conductive yarn 611. Furthermore, in a plan view, the knitted fabric 50 comprises: the electrically conductive section 51, corresponding to an area enclosing the electrically conductive yarn 511; and an electrically non-conductive section 62, corresponding to an area enclosing only the electrically non-conductive yarn 621. The electrically conductive section 51, corresponding to an area enclosing the electrically conductive yarn 511, extends continuously in the X-direction to function as an electrically conductive element.

[0050] In the area of ​​the knitted fabric 50, including the electrically conductive yarn 511, the electrically conductive yarn 511 is preferably exposed on both the front and back sides of the knitted fabric 50. For example, in Fig. 3. A front side of a front side, and a back side of the side corresponds to the back side. In other words, the electrically conductive element 5 has a uniform structure in one thickness direction.

[0051] The modulus of elasticity differs between the electrically conductive yarn 511 and the electrically non-conductive yarns 611 and 621. The knitted fabric 50 can include a section in the thickness direction that is embedded in the rubber layer of the tire's inner surface. In a case where the modulus of elasticity of the section embedded in the rubber layer of the tire's inner surface varies in the thickness direction, the strength of the knitted fabric 50 is reduced, and the electrically conductive yarn 511 may break.

[0052] The electrically conductive yarn 511 is preferably a metal wire coated with an insulating coating. The insulating coating can prevent a short circuit at an unintended location in the electrical wiring contained within the electrically conductive element 5. Furthermore, if the insulating coating is melted by applying heat, the electrically conductive element 5 and an electrical device can be electrically connected by soldering. The insulating coating is preferably a resin such as nylon, polyester, polyurethane, or a fluoropolymer. Copper wiring with an enamel coating having a heat resistance of at least 180 °C is most preferred.

[0053] The electrically conductive yarn 511 itself is a non-stretch-conforming yarn but is configured as a knitted fabric 50, which allows adaptation to local strain due to deformation of the tire 1. Thus, the change in electrical resistance is small. For example, the electrical resistance of the electrically conductive element 5 is in the range of 4 Ω / m or more and 15 Ω / m or less. The change in electrical resistance due to strain of the electrically conductive element 5 is 10% or less at a 35% strain. Furthermore, the electrically conductive element 5 preferably has: an elongation at break of 200% or more; and a rate of increase in electrical resistance of 30% or less after 500,000 repetitions of a 10% strain.It should be noted that the electrical resistance described above is a value measured over a single continuous section made of electrically conductive yarn. For example, the values ​​described above are obtained by measuring over two sections of electrically conductive section 51 in . Fig. 2 and not by simultaneously conducting electricity through the electrically conductive section 51 and the electrically conductive section 52.

[0054] A value T per width of the tensile force in the longitudinal direction of the electrically conductive element 5 is preferably given in the relationship of formula (1) at a 100% elongation. 0.01 N / mm≤T≤1.0 N / mm

[0055] In equation (1), a continuous electrically conductive element (which may include the electrically conductive yarn and the electrically non-conductive yarn) to be installed in the tire is pulled at a speed of 500 mm / min using a tensile testing device, and a tensile test force applied at the point of 100% elongation is denoted as T. The width, as used here, is a dimension obtained before the tensile test in a direction perpendicular to the direction of the entire electrically conductive element. In a case where the T described above is greater than the range of equation (1), the uniformity of the tire 1 is degraded, and this is not preferred. In a case where the T described above is less than the range of equation (1), the yarn may break due to iterative stress, and this is not preferred.

[0056] The electrically conductive element 5 can include electrically non-conductive yarns arranged intermittently in the Y-direction, which intersects the X-direction, the X-direction corresponding to the direction of travel. The electrically non-conductive yarns arranged in the Y-direction act as a cushion between the electrically conductive yarns 511. This prevents damage to the insulating coatings of the electrically conductive yarns 511 when the electrically conductive element 5 is stretched, thus preventing a short circuit between the electrically conductive yarns 511.

[0057] Furthermore, the electrically conductive yarn 511 preferably includes a plurality of bundled metal wires. In a case where the plurality of metal wires are bundled, the fatigue resistance of the electrically conductive yarn 511 against iterative deformation of the tire 1 is improved.

[0058] The diameter of the metal wire, including the insulating coating, is preferably 10 µm or longer and 100 µm or shorter, and more preferably 20 µm or longer and 80 µm or shorter. Preferably, three or more and 12 or fewer metal wires are bundled to form an electrically conductive yarn 511. The knitted fabric 50 is produced using a plurality of the electrically conductive yarns 511. For example, the electrically conductive yarn 511 can include a number of bundled metal wires, each having a diameter of 30 µm, the diameter including the insulating coating.

[0059] The knitted fabric 50 is formed by blending the electrically conductive yarn 511 with the electrically non-conductive yarns 611 and 621. The electrically non-conductive yarns 611 and 621, which are made of organic fibers or the like, are more readily impregnated with the rubber of the tire's inner surface than the electrically conductive yarn 511, which is made of metal. Thus, the electrically non-conductive yarns 611 and 621 and the rubber of the tire's inner surface exhibit excellent adhesion and improve durability. It should be noted that, for improved impregnation with the rubber, the electrically conductive element 5 can be stretched by 5% or less during the tire's molding process before being incorporated into the rubber material.

[0060] As with reference to Fig. As described in Figure 2, the electrically non-conductive section 62, which encloses the electrically non-conductive yarn 621, is preferably provided between the electrically conductive section 51 and the electrically conductive section 52, both of which enclose the electrically conductive yarn 511. By providing the electrically non-conductive section 62, several of the electrically conductive sections 51 and 52 can be incorporated into the single knitted fabric 50.

[0061] The electrically non-conductive yarns 611 and 621 are preferably fibers with high heat resistance to withstand soldering. For the electrically non-conductive yarns 611 and 621, aramid or the like is preferably used, for example, with regard to heat resistance and durability.

[0062] The electrically non-conductive yarns 611 and 621 can also each be formed by bundling a large number of fibers. In this case, the yarn can be formed from bundled fibers that are thinner and more numerous than the electrically conductive yarn 511. Thus, the flexibility of the knitted fabric 50 can be ensured instead of the electrically conductive yarn 511.

[0063] Preferably, the color of the electrically conductive yarn 511 differs from the color of the electrically non-conductive yarns 611 and 621. The different colors make it easy to identify connection positions for the electrodes and the like, thus improving processability if the electrically conductive sections 51 and 52 are electrically connected to the electrical device by the electrically conductive yarn 511. Furthermore, the inner surface of tires is often black, and therefore the electrically conductive yarn 511 and the electrically non-conductive yarns 611 and 621 preferably each have a color that is brighter than black and provides sufficient contrast.

[0064] In other words, the yarns form the knitted fabric 50, wherein at least a portion of the electrically conductive yarn 511 and the electrically non-conductive yarns 611 and 621 are preferably embedded in the inner liner layer 9, which corresponds to the tire inner surface rubber layer. Of the yarns forming the knitted fabric 50, at least a portion of the yarns in contact with the rubber layer of the tire inner surface are embedded in the rubber layer, thus ensuring a strong bond and improving durability. It should be noted that if the minimum distance between the yarns forming the knitted fabric 50 and the carcass cord threads of the carcass layer 13 is set to be equal to or greater than 0.3 mm, then the air barrier properties of the inner liner layer 9 are preferably not inhibited and oxidative degradation is not promoted.

[0065] Gap sections G and H, formed between the yarns that make up the knitted fabric 50, are provided. When the electrically conductive element 5 is arranged on the inner surface of the tire, the inner core layer 9, corresponding to the rubber layer of the inner surface of the tire, is preferably exposed on the surface of the knitted fabric 50 through the gap sections G and H. That is, the inner core layer 9 preferably includes exposed areas on the surface of the knitted fabric 50 through the gap sections G and H. The electrically conductive yarn 511 can be fatigued and cut over time due to mutual contact and metal fatigue resulting from the structure of the knitted fabric 50.When the electrically conductive element 5 is installed, the inner core layer 9, corresponding to the rubber layer of the tire's inner surface, is exposed on the surface of the knitted fabric 50, and at least a portion of the electrically conductive element 5 is embedded in the rubber layer of the tire's inner surface, thus preventing it from fatigued and being cut. In a freely selected area of ​​the knitted fabric 50 in a top view, the proportion of the total value of the exposed area of ​​the rubber layer of the tire's inner surface is preferably, for example, 2% or more and 70% or less. In a case where the proportion of the total value of the exposed area of ​​the rubber in the freely selected area is less than 5%, the durability is reduced, and this is not preferred.Furthermore, in a case where the proportion of the total value of the exposed area of ​​the rubber in the freely selected area exceeds 70%, an electrical connection to the electrical device or the like by soldering or the like is prevented, and this is not preferred. It should be noted that in the freely selected area of ​​the fabric 50, in a top view, the proportion of the total value of the exposed area of ​​the rubber of the rubber layer of the tire inner surface is more preferably 4% or more and 50% or less.

[0066] It should be noted that the air permeability of the knitted fabric 50 according to the method of JIS L 1096 A is preferably equal to or greater than 60 cm². 3 / cm 2 Furthermore, the air permeability of the knitted fabric 50, according to the method of JIS L 1096 A, is preferably in a range of 60 cm. 3 / cm 2 ·s or more and 500 cm 3 / cm 2·s or less. In a case where the knitted fabric 50 has an air permeability within the range described above, the impregnation into the rubber is carried out in a suitable manner, and the adhesion is improved. Adjustment range of the electrically conductive element

[0067] Fig. Figure 4 is a diagram illustrating an example of an adjustment range of the electrically conductive element 5. The electrically conductive yarn 511, which forms the knitted fabric 50 of the electrically conductive element 5, can be easily cut due to mutual contact or metal fatigue, particularly in a flex zone FZ of the tire 1. The flex zone FZ is an area in the sidewall rubber 16 that absorbs various forces exerted by the road surface during vehicle travel.

[0068] In Fig. 4 The bending zone FZ is located, for example, in a region of 40% (0.4 Sh) or more and 70% (0.7 Sh) or less of a tire's cross-sectional height Sh. However, the tire's cross-sectional height Sh is measured from one side of the bead section 10, i.e., from the inside in the tire's radial direction. The electrically conductive element 5 is preferably provided on the side of the inner tire cavity 30 of the inner liner layer 9 in the region encompassing 40% or more and 70% or less of the tire's cross-sectional height Sh. The "cross-sectional height" refers to half the difference between a tire's outer diameter and a rim diameter when the tire 1 is mounted on a specified rim, inflated to a specified internal pressure, and in an unloaded state."Specified rim" refers to a "standard rim" as defined by JATMA, a "design rim" as defined by TRA, or a "measuring rim" as defined by ETRTO. "Specified inflation pressure" refers to a "maximum air pressure" as defined by JATMA, the maximum value in "TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES" as defined by TRA, or "INFLATION PRESSURES" as defined by ETRTO. It should be noted that for passenger car tires, JATMA specifies a maximum inflation pressure of 180 kPa. rubber top layer

[0069] The in Fig. The tire 1 shown in Figure 4 is provided with a rubber cover layer 130. In an area that includes the bending zone FZ, the rubber cover layer 130 is arranged on the side of the tire's inner cavity 30 of the electrically conductive element 5. The rubber cover layer 130 covers part of the electrically conductive element 5. Fig. Figure 5 is a view of an area that includes the bending zone FZ of the tire 1, viewed from the side of the tire's inner cavity 30.

[0070] As in Fig. As shown in Figure 5, the electrically conductive element 5 is arranged on an inner cavity side of the inner liner layer 9, which forms the inner surface of the tire. In the flex zone FZ, the electrically conductive element 5 is sandwiched between the inner liner layer 9 and the rubber cover layer 130 and is completely embedded in the rubber. This eliminates unproductive movement and mutual contact of the electrically conductive thread 511 in the flex zone FZ, thereby improving durability. It should be noted that in Fig. 4 and Fig. 5 both end sections 50T, 50T of the electrically conductive element 5 are not covered by the rubber cover layer 130 and are exposed to one side of the inner tire cavity. Contact with rim

[0071] With renewed reference to Fig. 4 The electrically conductive element 5 extends on the inner surface of the tire preferably beyond the bead heel 18 of the bead section 10 of the tire 1, at least to the bead base section 19. The extension of the electrically conductive element 5 to the bead base section 19 makes it possible to provide an electrical contact at a contact section with the rim.

[0072] Fig. Figure 6 is a diagram illustrating a state in which tire 1 is mounted on a rim. As in Fig. As shown in Figure 6, a rim 20 encloses an electrode 210 in a section that comes into contact with the bead base section 19 of the tire 1. When the tire 1 is mounted on the rim 20, a section of the electrically conductive element 5 is in electrical contact with the electrode 210. Thus, when an electrical device 7 is provided in the tire 1, the electrically conductive element 5 can electrically connect the electrode 210, which is provided on the rim 20 on which the tire 1 is mounted, to the electrical device 7. The electrically conductive element 5 is arranged to extend in a ribbon-like form to connect the bead section 10 and the electrical device 7. As shown in Figure 6, the electrically conductive element 5 is arranged to extend in a ribbon-like shape to connect the bead base section 10 and the electrical device 7. Fig. As shown in Figure 6, the wiring 220 is electrically connected to the electrode 210. Accordingly, the electrical device 7 can be supplied with power via the wiring 220, the electrode 210, and the electrically conductive element 5. It should be noted that the power supplied to the electrical device 7 includes a power supply voltage, a signal, and data.

[0073] It is not necessary for the entire area between the electrode 210 and the electrical device 7 to form the electrically conductive element 5 and be electrically connected; rather, only a part of the area can be electrically connected (e.g., the bending zone FZ). In other words, the electrically conductive element 5 electrically connects at least a part of the area between the electrical device 7 and the electrode 210, which is provided on the rim 20. Path of an electrically conductive element

[0074] As in Fig. 1, Fig. 4 and Fig. As illustrated in Figure 6, at least part of the electrically conductive element 5 extends through the inner surface of the tire. However, part of the electrically conductive element 5 may extend away from the inner surface of the tire through a section of the inner cavity 30 of the tire. Fig. Figure 7 is a diagram illustrating an example of a path along which the electrically conductive element 5 passes. In the diagram shown in Fig. In the illustrated example 7, a section 50A of the electrically conductive element 5 is not connected to the inner surface of the tire and floats in the inner cavity 30 of the tire. Part of the area between the electrical device 7 and the electrode 210 passes through a section of the inner cavity 30 that is located away from the inner surface of the tire, and this configuration makes the length of the electrically conductive element 5 shorter than a configuration in which the entire length of the electrically conductive element 5 passes through the inner surface of the tire. This allows for the suppression of an increase in power consumption or heating value and enables a reduction in the mass or cost of the electrically conductive element 5.

[0075] For example, a region of section 50A of the electrically conductive element 5 is preferably identical to a region contained within the bending zone FZ. In the bending zone FZ, if section 50A of the electrically conductive element 5 passes through the section of the inner cavity 30, the electrically conductive element 5 does not conform to the inner surface of the tire, even in cases where significant local deformation occurs in the sidewall section of the tire 1, for example, when the vehicle drives over a curb. Thus, damage to the electrically conductive yarn 511 is suppressed and its durability is improved.

[0076] The tire 1 can include electrically conductive elements 5 corresponding to the respective pair of bead base sections 19. Fig. Figure 8 is a diagram illustrating an example in which the electrically conductive elements corresponding to each pair of bead base sections 19 are provided. As in Fig. As illustrated in Figure 8, electrically conductive elements 5P and 5N are provided, corresponding to the respective pair of bead base sections 19. For example, electrically conductive element 5P is assigned to the positive electrode, electrically conductive element 5N is assigned to the negative electrode, and electrically conductive elements 5P and 5N are electrically connected to the electrodes that contact the corresponding bead base sections 19 and to the electrical device 7 provided in the tire 1. Electrically conductive element 5P is connected only to the positive electrode, and electrically conductive element 5N is connected only to the negative electrode.Thus, the tire 1 can provide a positive potential and a negative potential to the electrical device 7 provided in the tire 1 via the electrically conductive elements 5P and 5N, and can supply power to the electrical device 7 via the electrically conductive elements 5P and 5N.

[0077] In a case where the positive and negative electrodes are located on one side of the bead base section 19, the positive and negative electrodes must be aligned with the electrically conductive elements 5P and 5N in the circumferential direction of the tire during assembly on the rim. However, by using a configuration in which the electrically conductive element 5P is connected only to the positive electrode and the electrically conductive element 5N is connected only to the negative electrode, this alignment is unnecessary, thus improving work efficiency. Electrical device

[0078] The electrical device 7 is provided, for example, in the tire 1 after the tire has been formed. The electrical device 7 is provided on the inner side of the tread section in the tire radial direction and on the inner cavity side of the inner liner layer 9. The electrical device 7 is provided, for example, at a position that intersects the tire equatorial plane CL, as shown in Fig. Figure 8 illustrates this. A section of the electrical device 7 is electrically connected to the electrically conductive element 5. The electrical device 7 is a device that operates using electrical energy and includes an electronic circuit and an electrical actuator. For example, the electrical device 7 is a circuit that includes a power generating element, a circuit that includes a sensor for measuring a physical quantity such as pressure, temperature, acceleration, an electric field, a magnetic field, an electric potential, an electrical resistance, or the like, an actuator such as a motor or pump, a communication module, a radio tag, a rectifier circuit for a receiving or transmitting antenna for contactless electrical power supply, a secondary battery, or the like.The electrical device 7 includes any of various sensors, a motor, a heater, an electromagnetic coil, any of various actuators, a circuit board or the like, alone or in combination with each other.

[0079] The electrical device 7 can be a connector for connecting electronic circuits, electrical actuators, or the like. A connector can be installed on the inner surface of the tire during its molding process, and electronic circuits, electrical actuators, or the like can be connected to the connector after the tire has been formed. Connecting electronic circuits, electrical actuators, and the like via the connector allows for the replacement of these components, thus enabling improvements, modifications, and troubleshooting.

[0080] It should be noted that the electrical device 7 can be powered by the electrically conductive element 5 and can transmit and receive data via power line carrier communication over the electrically conductive element 5. In the Fig. In the illustrated example 8, the electrically conductive element 5 is positioned such that it extends from the electrical device 7 to an electrode provided on a rim of the bead base section 19. Thus, the electrical device 7 can, for example, receive power supplied by the electrode provided on the rim via the electrically conductive element 5. Furthermore, the electrical device 7 can, for example, transmit and receive data to and from the electrode provided on the rim via the electrically conductive element 5. Placement area of ​​the electrical device

[0081] A preferred placement area for the electrical device 7 is now described. It is difficult to attach the electrical device 7 to an inner surface of the tire 1. In various driving modes of the vehicle, such as starting, accelerating, decelerating, stopping, and the like, there are some areas where local deformation of the tire 1 is relatively significant, and other areas where local deformation of the tire 1 is relatively insignificant. To stably attach the electrical device 7 to the inner surface of the tire 1, an area where local deformation of the tire 1 is significant is preferably avoided, and the electrical device 7 is preferably arranged in an area where local deformation of the tire 1 is insignificant.Therefore, the electrical device is preferably arranged in a different area than sections of the sidewall of the tire 1 where the sections deform relatively strongly. The electrical device is preferably arranged in a different area than sections located directly beneath the circumferential grooves.

[0082] Fig. Figure 9 is a diagram illustrating an example of a placement area for the electrical device. Fig. Figure 9 is a cross-sectional view in the tire meridian direction. Fig. Figure 9 illustrates a tire in which four circumferential grooves are arranged in the tread section. Fig. 9 The circumferential grooves 21 to 24 have a groove width of 3 mm or longer in a tire outer surface and a maximum groove depth of 40% or more of the thickness of the tread rubber 15. The circumferential grooves 21 to 24 can have a serpentine or zigzag shape extending in the tire circumferential direction, with the position varying in the tire width direction.

[0083] In Fig. 9 is a normal extending from an end section of each of the circumferential grooves on an outer surface of the tire 1 to the inner surface of the tire 1, defined as a normal S1. Additionally, a normal extending from an outermost position defined by either the belt 141 or 142 or the belt cover 143 to the inner surface of the tire 1 is designated as a normal S2. The areas RA to RE are defined on the inner surface of the tire 1 using normals S1 and S2. The areas RA, RB, and RC are located on the inner surface of the tire 1, are areas other than the circumferential groove areas, and are each located between the adjacent normals S1. The areas RD and RE are located on the inner surface of the tire 1 and are each located between normals S1 and S2, respectively. Area RD is an area on a vehicle outer side of the tire equatorial plane CL.The RE area is an area on the inside of a vehicle of the tire equatorial plane CL.

[0084] Furthermore, a position 0.5 Sh, corresponding to 50% of the tire's cross-sectional height Sh, is used to define areas RF and RG on the inner surface of tire 1. Areas RF and RG are located on the inner surface of tire 1 and extend from the bead point 18, which corresponds to an end section of the inner surface of tire 1, to the 0.5 Sh position at 50% of the tire's cross-sectional height Sh. Area RF is an area on the vehicle's outer side of the tire's equatorial plane CL. Area RG is an area on the vehicle's inner side of the tire's equatorial plane CL. Areas RF and RG are located in a different area than sections of the tire's sidewall where these sections deform relatively significantly.

[0085] It should be noted that in the following description, “arrangement” for the electrical device 7 refers to the fact that half or more of the electrical device 7, viewed from a top view from the inner surface of the tire 1, is located within one of the areas RA to RG.

[0086] The electrical device 7, which includes an acceleration sensor, can be provided in the tire 1 to determine a contact patch shape by estimating the extent of deformation of the tire tread and the time required for the deformation. In this case, the electrical device 7 is preferably arranged at a position corresponding to the tread section. In particular, the electrical device 7 is preferably located in one of the Fig. The 9 illustrated areas RA, RB, RC, RD are arranged. If the electrical device 7 is located in area RD or area RE, the wiring from the bead section 10 to the electrical device 7 can be shortened. If the electrical device 7 is located in area RA, the measurement can be performed at the ground contact center of the tire 1.

[0087] The electrical device 7, which includes a magnetic sensor, can be provided within the tire 1. The electrical device 7, which includes a magnetic sensor, is provided for measuring geomagnetism or for measuring a magnetic field from a magnetic field generating element that is intentionally installed on the tire 1 or the vehicle body. In a case where the electrical device 7 includes a magnetic sensor, the electrical device 7 is preferably arranged on or near the bead section 10, rather than in a tread section located on or near the inner surface of the tire 1 where steel cords are arranged. Even in a case where the electrical device 7 is arranged on or near the bead section 20, the electrical device 7 is preferably positioned where there is a linear distance of 2 mm or more from the bead wire to the magnetic sensor.Accordingly, in a case where the electrical device 7 includes a magnetic sensor, the electrical device 7 is preferably arranged either in region RF or region RG. However, in a case where the belt cords are non-magnetic materials such as aramid, the electrical device 7 can be arranged in any of the regions RA, RB, RC, RD, and RE.

[0088] The tire 1 can be equipped with the electrical device 7, including a sensor for measuring electromagnetic fields; or with the electrical device 7, which utilizes an electromagnetic physical phenomenon. In line with the recent trend of equipping automobiles with electrical components, the types of electromagnetic waves generated by vehicles have increased. Furthermore, contactless power supply between the vehicle and the road surface or between the vehicle and the wheel has been developed. To suppress the effects of the electromagnetic waves generated by the vehicle and to achieve measurement accuracy of the sensors and precise actuation of the actuators, the electrical device 7 is preferably arranged on the outside of the vehicle, in a case where the electrical device is mounted on the vehicle.Thus, the electrical device 7 is preferably arranged in the area selected from the area RA on the outside of the vehicle with respect to the equatorial plane CL, the area RB, the area RD and the area RF according to other requirements.

[0089] Fig. Figure 10 is a diagram illustrating another example of the placement area of ​​the electrical device. Fig. Figure 10 is a cross-sectional view in the tire meridian direction. Fig. Figure 10 illustrates a tire in which three circumferential grooves are arranged in the tread section. Fig. Figure 10 illustrates a case in which the circumferential groove 23 is located on the equatorial plane CL. In the case described in Fig. 10 illustrated tires 1, as above with reference to Fig. As described in section 9, the electrical device is preferably arranged in a different area than sections of the sidewall section of the tire 1 where the sections deform relatively strongly. The electrical device is preferably arranged in a different area than sections located directly beneath the circumferential grooves. In particular, the electrical device 7 is preferably provided in one of the areas RB, RC, RD, RE, RF, and RG. One of the areas RB, RC, RD, RE, RF, and RG in which the electrical device 7 is preferably provided is an area as described above with reference to Fig. 9 described.

[0090] As described above, the electrical device 7 is preferably arranged on the inner surface of the tire 1 in areas other than the sections immediately beneath the circumferential grooves and other than the sections of the sidewall that deform relatively significantly. In such areas, the electrical device 7 can be stably attached to the inner surface of the tire 1. Furthermore, by selecting a suitable area and arranging the electrical device 7 in that area, the effects of electromagnetic waves generated by the vehicle can be suppressed, and the measurement accuracy of the sensors and the precise actuation of the actuators can be achieved. Placement example of an electrical device

[0091] Fig. 11 and Fig. Figure 12 are diagrams illustrating a placement example of the electrical device 7. Although Fig. 11. Where the electrical device 7 is illustrated in such a way that its interior can be understood, in practice a resin mold or the like is present in a dashed section to make the interior of the electrical device 7 invisible. As shown in Fig. As shown in Figure 11, the electrically conductive element 5 is provided on a surface of the inner core layer 9. The electrically conductive element 5 encloses the electrically conductive section 51 and the electrically conductive section 52. The electrically conductive section 51 and the electrically conductive section 52 each extend in a band-like fashion in the X direction. The distance between the electrically conductive section 51 and the electrically conductive section 52 is constant in the Y direction.

[0092] Furthermore, the electrical device 7 is provided at an end section of the electrically conductive element 5 on the surface of the inner core layer 9. The electrical device 7 encloses a substrate 700. A connection terminal 701 and a connection terminal 702 are provided on the substrate 700. The connection terminal 701 and the connection terminal 702 are fixedly connected to the electrical device 7, and the distance between the connection terminals 701 and 702 is constant. The connection terminal 701 and the connection terminal 702 serve, for example, to receive power. The substrate 700 is provided with electronic components 703, 704, and 705, such as an integrated circuit (IC) chip and a wireless communication module. The electronic component 703 is electrically connected to the connection terminal 701 and the connection terminal 702.Connection terminal 701 is electrically connected to electrically conductive section 51. Connection terminal 702 is electrically connected to electrically conductive section 52.

[0093] As described above, the electrical device 7 includes the connection terminals 701 and 702 to which the supplied power is applied, the electrically conductive element 5 includes the ribbon-shaped electrically conductive sections 51 and 52 corresponding to the connection terminals 701 and 702, and the connection terminal 701 and the connection terminal 702 are at least partially electrically connected to the electrically conductive section 51 and the electrically conductive section 52, respectively.

[0094] As in Fig. As shown in Figure 12, a distance W7 between the connection terminal 701 and the connection terminal 702 is preferably equal to a distance W5 between the electrically conductive section 51 and the electrically conductive section 52. Since the distance W7 and the distance W5 are equal, the connection terminal 701 and the connection terminal 702 can be easily positioned with respect to the electrically conductive section 51 and the electrically conductive section 52, which improves the efficiency of connecting the electrical device 7 and the electrically conductive element by soldering or the like. It should be noted that the distance W7 is located between the center of the connection terminal 701 in the Y-direction and the center of the connection terminal 702 in the Y-direction. The distance W5 is located between the center of the electrically conductive section 51 in the Y-direction and the center of the electrically conductive section 52 in the Y-direction.

[0095] Therefore, if a plurality of the connecting terminals 701 and 702, which are attached to the electrical device 7 mounted on the inner surface of the tire with a constant distance between the connecting terminals 701 and 702, are electrically connected to the electrically conductive element 5 by soldering or the like, the distance between the plurality of connecting terminals 701 and 702 overlaps the distance between the electrically conductive sections 51 and 52 in the Y-direction. In a case where the distance between the connecting terminals 701 and 702 does not overlap the distance between the electrically conductive sections 51 and 52 in the Y-direction, wiring must be provided separately to implement an electrical connection. The separately provided wiring or the like can be fatigued and cut due to vibrations associated with the rotation of the tire 1, and this is not preferred.Thus, it overlaps, as in . Fig. Figure 12 shows the distance between the multiple connection terminals 701 and 702, the distance between the electrically conductive sections 51 and 52 in the Y direction.

[0096] In Fig. 12 is a width W6 of the electrically non-conductive section 62 in the Y-direction, preferably equal to or greater than 0.5 mm. This serves to ensure the adhesion of the electrically non-conductive yarn forming the electrically non-conductive section 62 to the inner surface of the tire and to generate a minimal heat dissipation effect.

[0097] Fig. 13, Fig. 14 and Fig. Figure 15 are diagrams illustrating placement examples of the electrically conductive element 5 on the inner surface of the tire 1. Fig. 13, Fig. 14 and Fig. 15 illustrate examples in which the electrical device 7 is used in the context of which reference is made to Fig. 9 and Fig. The area RA described in section 10 is located there. Fig. 13, Fig. 14 and Fig. 15 The electrically conductive element 5 is arranged running along the inner surface of the tire. As in Fig. As shown in Figure 13, electrically conductive elements 5P and 5N, which have a wide width in the circumferential direction of the tire, are preferably used for a large electrical device 71 that requires relatively high power. End sections 5T of the electrically conductive elements 5P and 5N are arranged on the bead base sections 19. Fig. 13 The electrically conductive elements 5P and 5N extend in the tire width direction from the position of the electrical device 72 and then extend in the tire radial direction along the inner surface of the tire to reach the bead base section 19.

[0098] On the other hand, as in Fig. Figure 14 shows that for a small electrical device 72, which operates at relatively low power, electrically conductive elements 5P and 5N, arranged in the circumferential direction of the tire, are used. The end sections 5T of the electrically conductive elements 5P and 5N are arranged on the bead base sections 19. Fig. 14 is a direction Y1 of the electrically conductive elements 5P and 5N parallel to the tire width direction. The electrically conductive elements 5P and 5N extend in the tire width direction from the position of the electrical device 72 and then extend in the tire radial direction along the inner tire surface to reach the bead base section 19. In the present example, the electrical device 72 is aligned with the end sections 5T in the tire circumferential direction.

[0099] Furthermore, the direction of the electrically conductive element can be arranged in a direction that is inclined relative to the tire width direction and not parallel to the tire width direction. That is, as in Fig. As shown in Figure 15, electrically conductive elements 5P1 and 5N1, which are connected to the electrical device 72, can extend in a direction inclined with respect to the tire width direction. Fig. 15 The orientation Y2 of the electrically conductive elements 5P1 and 5N1 is not parallel to the tire width direction, and the orientation Y2 is inclined with respect to the tire width direction. The electrically conductive elements 5P1 and 5N1 extend in a direction inclined with respect to the tire width direction from the position of the electrical device 72 and extend in a direction inclined with respect to the tire radial direction along the inner tire surface to reach the bead base section 19. Because the electrically conductive elements 5P1 and 5N1 are inclined, the electrical device 72 is not aligned with the end sections 5T in the tire circumferential direction. Depending on the knitting pattern, the degree of extensibility and the repeatability of the knitted fabric 50 vary between the longitudinal direction (X-direction) and the lateral direction (Y-direction).Thus, in an area passing through the bending zone FZ described above, the stability can be improved by displacement inclined in the direction of the tire width. Wiring configuration

[0100] Unlike ordinary power wiring, at least part of the electrically conductive element 5 touches or is embedded in the rubber of the inner core layer 9, and thus heat generated by power transmission is difficult to release. Fig. 16 and Fig. Figure 17 are diagrams illustrating the heat generated by the electrically conductive element 5. Fig. 16 and Fig. Figure 17 shows cross-sectional views illustrating a state in which part of the electrically conductive section 51 is embedded in the rubber of the inner core layer 9. Fig. 16 and Fig. 17, even with the same cross-sectional area of ​​the electrically conductive section 51, a width WH orthogonal to the direction of the electrically conductive yarn exposed from the inner insulating layer 9 is present in the case of Fig. 17 greater than in the case of Fig. 16. Thus, the heat dissipation effect of the electrically conductive section 51 in the case of Fig. 17 more outstanding than in the case of Fig. 16.

[0101] The cross-sectional area and the placement shape of the electrically conductive element 5 must meet the conditions described below. In other words, there must be a ratio Imax / S of a maximum value Imax (A) of the transmitted current to a total cross-sectional area S (mm²). 2The cross-sectional area of ​​the electrically conductive yarn forming the electrically conductive element 5 is within a range of 0.01 ≤ Imax / S ≤ 20, and the ratio Pmax / WH of a maximum value Pmax (W) of the transmitted power to the width WH (mm) orthogonal to the direction of the electrically conductive yarn forming the electrically conductive element 5 is within a range of 0.01 ≤ Pmax / WH ≤ 2. However, in a case where the electrically conductive yarn includes an insulating coating, the cross-sectional area is calculated excluding the insulating coating. These ranges represent unique conditions for ensuring heat dissipation in a case where at least part of the metal wire is embedded in the rubber and a current flows through the metal wire.

[0102] In a case where these ranges are exceeded, the temperature rises if heat dissipation does not keep pace with heat generation, and this is not preferred. Within the ranges, there is no problem with heat generation, but the resulting tire incorporates an excessive amount of electrically conductive yarn and is heavy, and this is not preferred. In a case where multiple electrically conductive sections are installed for power supply, such as a positive electrode and a negative electrode, the conditions described above must be met for each of the electrically conductive sections. Unlike the electrically conductive section for power supply, the electrically conductive section that transmits measurement signals and data does not need to meet the conditions described above.This is because the transmission of measurement signals and data requires very little power, so heat generation is not a problem. It should be noted that the ratio Imax / S is preferably represented by 0.02 ≤ Imax / S ≤ 15 and that the ratio Pmax / WH is preferably represented by 0.02 ≤ Pmax / WH ≤ 1.5. Modified examples of electrically conductive elements

[0103] Fig. 18, Fig. 19, Fig. 20, Fig. 21 to Fig. 22 are top views, which are modified examples of the in Fig. 1 illustrated electrically conductive element 5 illustrate. In Fig. 18, Fig. 19, Fig. 20, Fig. 21 to Fig. In section 22, the longitudinal direction or direction of the electrically conductive element 5 is defined as the X-direction, and the lateral direction of the electrically conductive element 5 is defined as the Y-direction. The Y-direction is a direction orthogonal to the X-direction.

[0104] In a case where the adhesion between the electrically conductive yarn 511 and the rubber layer of the tire inner surface can be maintained despite a reduction in the area defined by the electrically non-conductive yarns 611 and 621, an electrically conductive element 5A, including the electrically conductive section 51, the electrically non-conductive section 62, and the electrically conductive section 52 arranged side by side in the Y direction, can be used instead of the electrically conductive element 5, as shown in Fig. 18 illustrated.

[0105] In Fig. 18 The electrically conductive element 5A includes the electrically conductive sections 51 and 52, which are arranged on the respective sides of the electrically non-conductive section 62 in the Y-direction. The electrically conductive section 51, the electrically non-conductive section 62, and the electrically conductive section 52 all extend in the X-direction. The electrically non-conductive section 62 is arranged between the electrically conductive section 51 and the electrically conductive section 52. Thus, in the Fig. Figure 18 illustrated electrically conductive element 5A, the two electrically conductive sections 51 and 52 electrically isolated by the electrically non-conductive section 62.

[0106] The in Fig. Figure 18 illustrates electrically conductive element 5A in a configuration in which the electrically non-conductive section 61 and the electrically non-conductive section 63 are in the Fig. The electrically conductive element 5 shown in Figure 2 has been omitted. The omission of the electrically non-conductive section 61 and the electrically non-conductive section 63 makes it possible to produce the electrically conductive element 5A more easily than the one shown in Figure 2. Fig. Figure 2 illustrated how to design electrically conductive element 5, and also enables cost reduction.

[0107] Furthermore, in a case where the insulation between the electrically conductive section 51 and the electrically conductive section 52 can be maintained, for example, if the electrically conductive section 51 and the electrically conductive section 52 are installed at a sufficient distance from each other, an electrically conductive element 5B may be used instead of the electrically conductive element 5, which has the electrically conductive section 51 and the electrically conductive section 52 separated from each other without an electrically non-conductive section being provided in between.

[0108] In Fig. 19 The electrically conductive element 5B includes the electrically conductive section 51 and the electrically conductive section 52, which are arranged side by side in the Y direction. The electrically conductive section 51 and the electrically conductive section 52 both extend in the X direction. The in Fig. Figure 19 illustrates electrically conductive element 5B having a configuration in which the electrically non-conductive sections 61, 62 and 63 are located in the Fig. The electrically conductive element 5 shown in Figure 2 has been omitted. The omission of the electrically non-conductive sections 61, 62, and 63 makes it possible to construct the electrically conductive element 5B much more easily than the one shown in Figure 2. Fig. Figure 2 illustrated how to design electrically conductive element 5, and also enables further cost reduction.

[0109] According to the information provided with reference to Fig. 18 and Fig. The power supply voltage can be applied to the electrically conductive elements 5, 5A and 5B described in section 19. In other words, the power supply voltage can be applied by connecting the two electrically conductive sections 51 and 52 to the positive and negative electrodes, respectively.

[0110] In addition to the two electrically conductive sections 51 and 52, another electrically conductive section may be required. For example, in addition to the power supply provided by the two electrically conductive sections 51 and 52, signals to be processed by the electrical device may be transmitted through another electrically conductive section. The addition of this electrically conductive section enables the transmission of signals to be processed within the electrical device.

[0111] A in Fig. The electrically conductive element 5C shown in Figure 20 has a configuration in which an electrically conductive section 53 and an electrically non-conductive section 64 are added to the one shown in Figure 20. Fig. The electrically conductive element 5 shown in Figure 2 is added. The electrically non-conductive sections 61, 62, 63, and 64 exhibit greater extensibility along the X-direction than the electrically conductive sections 51, 52, and 53. Thus, in a case where the electrically conductive element 5C is provided on the inner surface of the tire 1, guidance is facilitated. The use of the electrically conductive element 5C simplifies the task of providing the electrically conductive element 5C along the inner surface of the tire 1.

[0112] A in Fig. The electrically conductive element 5D shown in Figure 21 has a configuration in which the electrically conductive section 61 and the electrically non-conductive section 64 are located in the Fig. The electrically conductive element 5C shown in Figure 20 has been omitted. The omission of the electrically non-conductive section 61 and the electrically non-conductive section 64 makes it possible to produce the electrically conductive element 5D more easily than the one shown in Figure 20. Fig. 20 illustrated electrically conductive elements 5C to design, and also enables cost reduction.

[0113] A in Fig. The electrically conductive element 5E shown in Figure 22 includes the electrically conductive section 51, the electrically conductive section 52, and the electrically conductive section 53, which are separated from each other, with no electrically non-conductive section provided between them. In a case where adhesion between the electrically conductive yarn 511 and the rubber layer of the tire's inner surface can be maintained despite a reduction in the area defined by the electrically non-conductive yarns 611 and 621, for example, if the electrically conductive sections 51, 52, and 53 are installed at a sufficient distance from each other, the electrically conductive element 5E can be used instead of the electrically conductive element 5C.

[0114] In cases of Fig. 20, Fig. 21 to Fig. 22 A common negative electrode is used for power supply and signal transmission. Another electrically conductive section can be added if required, and the separate negative electrodes can be used for power supply and signal transmission.

[0115] It should be noted that the electrically conductive elements 5 and 5A to 5E described above can be used as electrically conductive materials that ensure the electrostatic removal function of the tire 1. In this case, at least a portion of the electrically conductive yarn 511 is preferably exposed on the inner surface of the tire. Thus, soldering or the like can be used to connect it to the electrical device 7 or the like after the tire has been formed.

[0116] A portion of the electrically conductive section of the electrically conductive element 5 described above can be used as an antenna, enabling contactless communication between a device outside the tire 1 and the electrical device 7. Accordingly, for example, data measured or processed by the electrical device 7 can be wirelessly transmitted to the device outside the tire 1, or the device outside the tire 1 can wirelessly transmit data to the electrical device 7. Mounting surface structures

[0117] Fig. 23, Fig. 24 to Fig. Figure 25 are appearance views illustrating examples of a mounting surface structure that can be used during the forming of tire 1.

[0118] A mounting surface structure 100A, which is in Fig. Figure 23 shows an electrically conductive layer enclosing the electrically conductive element 5, which in turn encloses a knitted fabric configured by mixing an electrically conductive yarn and a non-conductive yarn. The stretchable knitted fabric encloses a rubber layer that encloses an unvulcanized rubber sheet structure 8, and is produced by layers of these. In other words, the mounting sheet structure 100A has a structure in which the electrically conductive layer enclosing the electrically conductive element 5 is layered on top of the rubber layer enclosing the unvulcanized rubber sheet structure 8, which serves as the base. In the mounting sheet structure 100A, which is shown in Figure 23, the electrically conductive layer enclosing the electrically conductive element 5 is layered on top of the rubber layer enclosing the unvulcanized rubber sheet structure 8, which serves as the base. Fig. As shown in Figure 23, the unvulcanized rubber surface structure 8 and the electrically conductive element 5 can be press-fitted together.

[0119] The in Fig. The mounting surface structure 100A shown in Figure 23 is prefabricated, and the unvulcanized rubber surface structure 8 is connected to the inner surface of the tire 1 during the tire 1 molding step, with the electrically conductive element 5 located on the side of the inner cavity 30 of the tire. In other words, the mounting surface structure 100A is positioned on the surface of the inner liner layer 9 on the side of the inner cavity 30. Subsequently, vulcanization molding is performed. This facilitates tire molding. In other words, if the electrically conductive element 5 is attached to the rubber of the inner surface of the tire 1 alone during the tire 1 molding step, the appropriate adhesive force cannot be exerted, and the electrically conductive element 5 may detach after the molding step. By connecting the in Fig. A suitable adhesive force is achieved between the mounting surface structure 100A shown in section 23 and the inner surface of the tire.

[0120] The unvulcanized rubber sheet structure 8 preferably has a thickness of 1 mm or less. In a case where the unvulcanized rubber sheet structure 8 has a thickness of more than 1 mm, the uniformity of the tire 1 is affected, and this is not preferred.

[0121] Furthermore, the rubber material of the rubber layer enclosing the unvulcanized rubber sheet structure 8, which serves as the base in a case where the electrically conductive layer enclosing the electrically conductive element 5 is arranged in the tire 1 with respect to the adhesion between the inner liner layer 9 and the electrically conductive element 5, can be a rubber composition of the same type as that of the inner liner layer 9, and the rubber composition can be a rubber composition comprising: a rubber component; a condensation product of a compound represented by formula (2) and formaldehyde; a methylene donor; and a vulcanizing agent. It should be noted that in formula (2) R 1 , R 2 , R 3 , R 4 and R 5Each consists of hydrogen, a hydroxyl group, or an alkyl group with one to eight carbon atoms.

[0122] The in Fig. The mounting surface structure 100B shown in Figure 24 has a configuration such that the electrically conductive element 5, which is an electrically conductive layer, is layered onto the unvulcanized rubber surface structure 8, which is a rubber layer, and that the rubber cover layer 130, including another rubber layer, is layered onto the electrically conductive element 5. These layers may be pressed together. The in Fig. The mounting surface structure 100B shown in Figure 24 is prefabricated, and the unvulcanized rubber surface structure 8 is bonded to the inner surface of the tire 1 during the tire 1 molding step, with the rubber cover layer 130 located on the side of the inner tire cavity 30. Vulcanization molding is then performed. This facilitates tire molding, as in the case of Fig. 23.

[0123] The in Fig. The mounting surface structure 100C shown in Figure 25 includes the rubber cover layer 130, which is layered on an electrically conductive layer that encloses the electrically conductive element 5. In the Fig. In the 25 illustrated mounting surface structure 100C, in a case where the rubber cover layer 130 has a relatively high coverage rate in the X-direction of the electrically conductive element 5, sufficient adhesive force is exerted in an extension section in the Y-direction of the rubber cover layer 130 by increasing the width of the rubber cover layer 130 in the Y-direction. Thus, the unvulcanized rubber surface structure on the inner surface of the tire can be adhered in the manner shown in the illustration. Fig. The 25 illustrated mounting surface structures 100C are omitted.

[0124] As with reference to Fig. 23, Fig. 24 to Fig. As described in section 25, the mounting surface structures 100A, 100B, and 100C each include a rubber layer provided on at least one of a primary surface M1 and another primary surface M2 of the electrically conductive element 5, which is the electrically conductive layer. The mounting surface structures 100A, 100B, and 100C are configured by layers of the rubber layer and the electrically conductive element 5, which is the electrically conductive layer. The mounting surface structures 100A, 100B, and 100C, described with reference to Fig. 23, Fig. 24 to Fig. The components described in section 25 are arranged on the inner cavity side of the inner core layer 9. In this case, at least a part of the yarn forming the knitted fabric 50 is embedded in the rubber layer that encloses the sheet structure 8 made of unvulcanized rubber and is arranged on the inner cavity side of the inner core layer 9. 100%-Mode

[0125] Here, the 100% modulus of the composite material of the electrically conductive element 5 and the rubber layer of the tire's inner surface is preferably 102% or more and 180% or less than the 100% modulus of the rubber layer of the tire's inner surface alone. The 100% modulus of the composite material of the electrically conductive element 5 and the rubber layer of the tire's inner surface is measured using a sample obtained by peeling between the carcass layer 13 and the inner liner layer 9 of the tire 1. The 100% modulus varies depending on the ratio between the thickness of the electrically conductive element 5 and the thickness of the rubber layer of the tire's inner surface. Here, the 100% modulus is measured at the thickness of the actual tire 1.It should be noted that in a case where the unvulcanized rubber sheet or the rubber face sheet is layered, the 100% modulus is measured including the unvulcanized rubber sheet or the rubber face sheet. In other words, the 100% modulus is measured with all layers layered on the side of the inner cavity 30 of the carcass layer 13. In a case where the 100% modulus is smaller than the area described above, the innermost section of the rubber in the tire 1 flows to an outer side in the Y-direction during vulcanization. The innermost rubber layer becomes thinner, which degrades the air barrier performance, and this is not preferred. Since the 100% modulus is larger than the area described above, the installation section of the electrically conductive element 5 has increased stiffness, which degrades uniformity, and this is not preferred.

[0126] The 100% modulus of the composite material is determined as follows: Specifically, a sample of the composite material is taken from the electrically conductive element and the rubber layer of tire 1 on an inner side of the carcass layer, across the width of the electrically conductive element and along its longitudinal direction. The sample is then subjected to a tensile test. In the tensile test, the tensile stress (MPa) at 100% elongation is measured at a speed of 500 mm / min and a test temperature of 25 °C and determined according to JIS K6251. This value corresponds to the 100% modulus of the composite material. The 100% modulus of the tire inner surface rubber layer alone is measured in the same manner. List of reference symbols 1 pneumatic tire 5, 5A to 5E, 5N, 5N1, 5P, 5P1 Electrically conductive element 5T End Section 7, 71, 72 Electrical device 8 Unvulcanized rubber sheet structure 9 Inner Soul Layer 10 bead section 11 bead core 12 bead fillers 13 Carcass layer 14 Belt layer 15 tread rubber 16 side wall rubber 17 Rim pad rubber 18 bulging heaves 19 Bead base section 20 rim 21 to 24 Main circumferential groove 31 to 35 Bridge section 50 knitted fabrics 51 to 53 Electrically conductive section 61 to 64 Electrically non-conductive section 100A, 100B, 100C Mounting surface assembly 130 rubber top layer 141, 142 Cross belt 143 Belt cover 210 electrode 220 wiring 511 Electrically conductive yarn 611, 621 Electrically non-conductive yarn 700 substrate 701, 702 Connection port 703 Electronic Component FZ bending zone G, H Gap section RA to RG area

Claims

[1] Pneumatic tires (1), comprising: a rubber layer (130) of the inner tire surface, forming a tire inner surface; and an electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1), wherein at least a part of the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) is arranged on an inner cavity side of the rubber layer (130) of the inner surface of the tire, wherein the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) comprises a knitted fabric (50) which includes a yarn, wherein at least part of the yarn has electrical conductivity, wherein the knitted fabric (50) has elasticity, wherein the knitted fabric (50) is configured by mixing a yarn with electrical conductivity (511) and a yarn with electrical non-conductivity (611, 621), and wherein the knitted fabric (50) has in a top view: an electrically conductive section (51) corresponding to a range, which includes the electrically conductive yarn (511), and electrically non-conductive sections (61, 62) corresponding to an area that includes only the electrically non-conductive yarn (611, 621), wherein the electrically conductive section (51) is arranged between the non-electrically conductive sections (61, 62); an electrical device (7, 71, 72) which is provided in the tire (1), wherein the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) is electrically connected to the electrical device (7, 71, 72). [2] Pneumatic tires (1) according to claim 1, wherein the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) is arranged running along the inner surface of the tire, and a direction in which the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) extends is aligned with a direction in which the knitted fabric (50) has extensibility. [3] Pneumatic tire (1) according to claim 1, wherein the electrically conductive yarn (511) has a color that differs from a color of the electrically non-conductive yarn (611, 621). [4] Pneumatic tires (1) according to any one of claims 1 to 3, wherein the rubber layer (130) of the tire's inner surface is an inner liner layer, and at least part of the yarn forming the knitted fabric (50) is embedded in the inner core layer (9) or a rubber layer (130) arranged on the inner cavity side of the inner core layer (9). [5] Pneumatic tire (1) according to any one of claims 1 to 4, wherein the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) comprises a gap section (G, H) formed between the yarns that make up the knitted fabric (50), and the rubber layer (130) of the inner surface of the tire comprises an exposed area which is exposed on a surface of the knitted fabric (50) through the gap section (G, H). [6] Pneumatic tire (1) according to any one of claims 1 to 5, wherein the knitted fabric (50) has an air permeability of 60 cm³ 3 / cm 2 exhibits ·s or more. [7] Pneumatic tire (1) according to any one of claims 1 to 6, comprising a plurality of the electrically conductive elements (5, 5A to 5E, 5N, 5N1, 5P, 5P1), wherein each of the plurality of electrically conductive elements (5, 5A to 5E, 5N, 5N1, 5P, 5P1) is electrically connected to an electrical device (7, 71, 72) provided in the tire (1), and Power is supplied to the electrical device (7, 71, 72) via the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1). [8] Pneumatic tire (1) according to any one of claims 1 to 7, wherein the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) is provided in a region of 40% or more and 70% or less of a tire cross-sectional height (Sh). [9] Pneumatic tire (1) according to any one of claims 1 to 8, further comprising a rubber cover layer (130) which is provided on an inner cavity side of the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) and covers a part of the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1). [10] Pneumatic tire (1) according to any one of claims 1 to 9, wherein the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) extends on the inner surface of the tire beyond a bead tip (18) of a bead section (10) to at least a bead base section (19). [11] Pneumatic tire (1) according to claim 10, wherein the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) electrically connects at least a part of a region between the electrical device (7, 71, 72) provided in the tire (1) and an electrode (210) provided on a rim (20) mounted on the tire (1). [12] Pneumatic tire (1) according to claim 11, wherein in the part of the area between the electrical device (7, 71, 72) and the electrode (210) the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) extends through a section of the inner tire cavity that is located away from the inner surface of the tire. [13] Pneumatic tire (1) according to claim 11 or 12, wherein the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) is provided by each of a pair of bead base sections (19), the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) is electrically connected to each of the electrodes (210) that touch the pair of bead base sections (19) and to the electrical device (7, 71, 72) provided in the tire (1), and Power is supplied to the electrical device (7, 71, 72) via the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1). [14] Pneumatic tire (1) according to any one of claims 1 to 13, wherein a tensile force in a longitudinal direction of the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) has a value per width of 0.01 N / mm or more and 1.0 N / mm or less. [15] Pneumatic tire (1) according to any one of claims 1 to 14, wherein for the electrically conductive element (5, 5A to 5E, 5N, 5N1, 5P, 5P1) a ratio Imax / S of a maximum value Imax (A) of transmitted current to a total cross-sectional area S (mm²) 2 ) of the yarn with electrical conductivity 0.01 ≤ Imax / S ≤ 20, and a ratio Pmax / WH of a maximum value Pmax (W) of the transmitted power to a width WH (mm) orthogonal to a direction of the yarn with electrical conductivity (511) 0.01 ≤ Pmax / WH ≤ 2. [16] Pneumatic tire (1) according to any one of claims 1 to 15, wherein the electrical device (7, 71, 72) provided in the tire (1) is arranged on the inner surface of the tire in a region other than a section directly below a circumferential groove or in a region from an end section (5T) of the inner surface of the tire to a position (0.5 Sh) corresponding to 50% of a tire cross-sectional height (Sh). [17] Use of a mounting surface structure (100A, 100B, 100C) for a pneumatic tire according to any one of claims 1 to 16, comprising: an electrically conductive layer comprising the knitted fabric (50), wherein the knitted fabric (50) has extensibility, and; wherein the rubber layer (130) is provided on at least one of a main surface (M1) and another main surface (M2) of the electrically conductive layer, wherein the mounting surface structure is configured by layers of the electrically conductive layer and the rubber layer (130). [18] Use according to claim 17, wherein a 100% modulus in a state in which the electrically conductive layer is layered onto the rubber layer (130) is 102% or more and 180% or less of a 100% modulus of the rubber layer (130) alone.

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