Tire with functional component

Abstract

To provide a tire with a functional component which has excellent sensing strength of a sensor function included in the functional component provided on a tire inner surface of a tread part.SOLUTION: A tire with a functional component includes: a tread part extending in a tire circumferential direction and forming an annular form; a pair of side wall parts disposed at both sides of the tread part; and a pair of bead parts disposed at the inner side in a tire radial direction of the pair of side wall parts, and has: at least one carcass layer installed between the pair of bead parts; and a belt layer which is disposed at the outer periphery side of the carcass layer in the tread part and in which a plurality of steel cords are buried in parallel to each other on one surface. The tire includes a storage body containing a functional component on a tire inner surface of the tread part. The functional component has at least a contact surface which contacts with the tire inner surface; and a sensor function configured to detect tire information. A total thickness (Gb) of the belt layer is 2.3 mm or thicker.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a tire provided with a functional component having a sensor function for detecting tire information on the inner surface of the tire tread portion.

Background Art

[0002] In order to detect tire information, a functional component having a sensor function (such as an electronic component such as a sensor unit) is disposed in the tire. In particular, due to the ease of detecting air pressure and wear, such functional components are disposed on the inner surface of the tire tread portion (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, the functional component disposed on the inner surface of the tire tread portion is less likely to have a high sensing intensity of the sensor function due to the influence of tire rotation during running, and there is room for further improvement.

[0005] Therefore, an object of the present invention is to provide a tire with a functional component having an excellent sensing intensity of the sensor function of the functional component provided on the inner surface of the tire tread portion.

Means for Solving the Problems

[0006] To solve the above problems, the inventor of the present invention has conducted intensive studies and has provided a tire having a tread portion extending in the tire circumferential direction and forming an annular shape, a pair of sidewall portions disposed on both sides of the tread portion, and a pair of bead portions disposed on the inner side in the tire radial direction of the pair of sidewall portions. The tire further includes at least one carcass layer mounted between the pair of bead portions and a belt layer disposed on the outer circumferential side of the carcass layer in the tread portion, in which a plurality of steel cords are embedded in parallel on one surface. The tire further includes a container accommodating a functional component on the inner surface of the tread portion of the tire. The functional component has at least a contact surface that contacts the inner surface of the tire and a sensor function for detecting tire information. The inventors have found that when the total thickness (Gb) of the belt layer is 2.3 mm or more, the sensing intensity of the sensor function of the functional component is excellent, and thus the present invention has been completed.

[0007] That is, the present invention is as follows <1> to <7>. <1>A tire having a tread portion extending in the tire circumferential direction and forming an annular shape, a pair of sidewall portions disposed on both sides of the tread portion, and a pair of bead portions disposed on the inner side in the tire radial direction of the pair of sidewall portions. The tire further includes at least one carcass layer mounted between the pair of bead portions and a belt layer disposed on the outer circumferential side of the carcass layer in the tread portion, in which a plurality of steel cords are embedded in parallel on one surface, wherein the tire further includes a container accommodating a functional component on the inner surface of the tread portion of the tire, the functional component having at least a contact surface that contacts the inner surface of the tire and a sensor function for detecting tire information, and the total thickness (Gb) of the belt layer is 2.3 mm or more. <2>The tire according to <1>, wherein the belt layer contains 2.0 parts by mass or more of a vulcanizing agent with respect to 100 parts by mass of the rubber component constituting the belt layer. <3>The tire according to <1> or <2>, wherein the maximum wire diameter (Dw) of the steel cord and the Gb satisfy the relationship of the following formula (1). (1) Dw > 0.015Gb + 0.17 <4>The container includes a sheet-like base portion having one surface joined to the inner surface of the tire, and a side wall protruding from the surface of the base portion opposite to the surface joined to the inner surface of the tire, and includes a housing portion that houses the functional component so that the side wall surrounds the functional component. The tire according to any one of <1> to <3>, wherein a crown gauge (Gc), which is the thickness of the side wall at the midpoint of the straight-line distance from the surface of the base portion joined to the inner surface of the tire to the protruding end of the side wall, and the Gb satisfy the relationship of the following formula (2). (2) Gc ≧ 0.075Gb + 1.3 <5>The tire according to any one of <1> to <4>, wherein the container is fixed to the inner surface of the tire. <6>The tire according to <5>, wherein the container is fixed to the inner surface of the tire with an adhesive. <7>The tire according to any one of <1> to <6>, wherein the sensor function of the functional component is a sensor function using a piezoelectric element as a sensor element.

Advantages of the Invention

[0008] According to the present invention, it is possible to obtain a tire with a functional component having excellent sensing strength of a sensor function provided on the inner surface of the tire in the tread portion.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0010] The present invention will be described. The present invention includes a tread portion that extends in the tire circumferential direction and forms an annular shape, a pair of sidewall portions disposed on both sides of the tread portion, and a pair of bead portions disposed on the inner side in the tire radial direction of the pair of sidewall portions. The tire has at least one carcass layer mounted between the pair of bead portions, and a belt layer in which a plurality of steel cords are embedded in parallel on one surface and disposed on the outer peripheral side of the carcass layer in the tread portion. The tire is provided with a container in which functional components are housed on the inner surface of the tire in the tread portion. The functional components have at least a contact surface that contacts the inner surface of the tire and a sensor function for detecting tire information. The tire is such that the total thickness (Gb) of the belt layer is 2.3 mm or more. Hereinafter, this will also be referred to as "the tire of the present invention".

[0011] In the present invention, the numerical range represented by "~" means a numerical range in which the numerical value described before "~" is the lower limit value and the numerical value described after "~" is the upper limit value, unless otherwise specified.

[0012] Hereinafter, the configuration of the tire (main body) of the present invention, the configuration of the container provided in the tire of the present invention, etc. will be described in detail with reference to the drawings. Note that the dimensional ratios (length, thickness, etc.), orientations, etc. of each member shown in the drawings may be different from the actual dimensional ratios, orientations, etc. in order to facilitate understanding of the invention. Also, in some cases, some reference signs etc. may be omitted.

[0013] [Tire] The main body of the tire of the present invention includes, for example, a tread portion 1 that extends in the tire circumferential direction and forms an annular shape as shown in the embodiment of FIG. 1, a pair of sidewall portions 2, 2 disposed on both sides of the tread portion 1 (both ends in the tire width direction), and a pair of bead portions 3, 3 disposed on the inner side in the tire radial direction of the pair of sidewall portions 2, 2. It includes at least one carcass layer 4 mounted between the pair of bead portions 3, 3, and a belt layer 7 in which a plurality of steel cords are embedded in parallel on one surface and disposed on the outer peripheral side of the carcass layer 4 in the tread portion 1.

[0014] In this embodiment, the carcass layer 4 includes a plurality of reinforcing cords extending in the tire radial direction, and is folded back from the inner side to the outer side around the bead core 5 disposed in each bead portion 3. A bead filler 6 made of a rubber composition having a triangular cross section is disposed on the outer periphery of the bead core 5.

[0015] Also, as described above, one or more (preferably a plurality of) belt layers 7 are disposed on the outer peripheral side of the carcass layer 4 in the tread portion 1. These belt layers 7 include a plurality of steel cords (a plurality of steel cords embedded in parallel on one surface) that are inclined in substantially the same direction with respect to the tire circumferential direction, and when a plurality of belt layers 7 are included, at least some of the layers are arranged such that the steel cords intersect each other. In the belt layer 7, the inclination angle of the steel cord with respect to the tire circumferential direction is set, for example, in the range of 10° to 60° at the smaller angle. On the outer peripheral side of the belt layer 7, at least one belt cover layer 8 formed by arranging reinforcing cords at an angle of, for example, 5° or less with respect to the tire circumferential direction may be disposed for the purpose of improving high-speed durability. As the reinforcing cords of the belt cover layer 8, organic fiber cords such as nylon and aramid are preferably used.

[0016] Here, the statement that a plurality of steel cords are "embedded in parallel on one side" in the belt layer 7 means that the center lines passing through the centers of the circumscribed circles in the radial direction of each of the plurality of steel cords included in the belt layer 7 are arranged on substantially the same plane and are substantially parallel to each other within the layer (so as to face in substantially the same direction). Note that the structure of each steel cord has a twisted structure composed of one or a plurality of strands (steel wire strands).

[0017] Furthermore, a tread rubber layer 15 is disposed on the tread portion 1. The tread rubber layer 15 includes at least a cap tread rubber layer 15A. In this embodiment, it is composed of two layers, namely, the cap tread rubber layer 15A forming the tread surface of the tread portion 1 and the under tread rubber layer 15B located on the inner side in the tire radial direction of the cap tread rubber layer 15A. Note that the tread rubber layer 15 may include a ground tread made of conductive rubber exposed on the tire contact surface and wing tips respectively disposed at both ends in the tire width direction of the cap tread rubber layer 15A.

[0018] The constituent components of the tire of the present invention (components constituting each member such as the tread portion 1 and each layer such as the belt layer 7) are not particularly limited, and known components for constituting a tire such as rubber components can be arbitrarily used. However, at least, the tread portion 1 and the belt layer 7 of the tire of the present invention contain a rubber component.

[0019] And in the tire of the present invention, the total thickness (Gb) of the aforementioned belt layer 7 is 2.3 mm or more. Thereby, the sensing intensity of the sensor function of the functional component accommodated in the container provided on the inner surface of the tire in the tread portion 1 becomes excellent. Note that it is more preferable that the total thickness (Gb) of this belt layer 7 is 2.4 mm or more. This upper limit may be 10.0 mm or less, may be 9.0 mm or less, or may be 8.0 mm or less.

[0020] Here, the "total thickness of the belt layer (total gauge, Gb)" means the thickness of one layer (the distance between both main surfaces) when the belt layer 7 is a single layer, and when the belt layer 7 is two or more layers, it means the sum of the distances (Gx) between the planes in which the center lines passing through the centers of the radially circumscribed circles of the plurality of steel cords embedded in each layer are arranged, plus the values obtained by taking half of the two Gx values that are arranged on the outermost side of the belt layer 7 (the belt layer 7 with a laminated structure) among these distances between the planes. That is, when the belt layer 7 is two or more layers, the value calculated as described above is made equal to the distance between both main surfaces (the outer surfaces of the belt layer 7 with a laminated structure). For example, when the belt layer 7 is two layers as shown in FIG. 4, the thickness (G1 + G1×1 / 2 + G1×1 / 2) obtained by adding the value obtained by taking half of the two (i.e., G1) of the distances (G1) between the planes (LF1 and LF2) in which the center lines passing through the centers of the radially circumscribed circles of the plurality of steel cords embedded in these two layers are arranged is the Gb of this two-layer structure. Also, when the belt layer 7 is four layers as shown in FIG. 5, the thickness (G1 + G2 + G3 + G1×1 / 2 + G3×1 / 2) obtained by adding the sum of the distances (G1, G2, and G3) between the planes (LF1, LF2, LF3, and LF4) in which the center lines passing through the centers of the radially circumscribed circles of the plurality of steel cords embedded in these four layers are arranged, plus the values obtained by taking half of the two (i.e., G1 and G3) of the distances between the planes that are arranged on the outermost side of the belt layer 7 is the Gb of this four-layer structure. And this thickness, the distance between the planes, etc. are the average values measured at any 10 locations. In FIGS. 4 and 5, for ease of understanding, the directions of the steel cords are all the same.

[0021] Furthermore, since the rigidity of the belt layer 7 is likely to be sufficient and the sensing intensity of the sensor function of the functional components is likely to be more excellent, it is more preferable that the belt layer 7 is an embodiment containing 2.0 parts by mass or more of a vulcanizing agent with respect to 100 parts by mass of the rubber component constituting the belt layer 7. And the lower limit of the content of this vulcanizing agent is more preferably 2.5 parts by mass or more, and even more preferably 3.0 parts by mass or more. The upper limit may be 5.0 parts by mass or less, and may be 4.5 parts by mass or less. As the vulcanizing agent, sulfur is typically exemplified, but as a component other than sulfur, a compound having a crosslinking function between polymers such as a peroxide may be used. Also, these may be used in combination.

[0022] Also, in the tire of the present invention, it is more preferable that the maximum wire diameter (Dw) of the steel cord embedded in the belt layer 7 and the total thickness (Gb) of the belt layer 7 described above satisfy the relationship of the following formula (1). This is because it is easy to further increase the rigidity of the belt layer 7 while maintaining a high sensing intensity of the sensor function of the functional components. (1) Dw > 0.015Gb + 0.17

[0023] And since the above effects are more likely to be exhibited, the maximum wire diameter (Dw) of this steel cord is more preferably a value larger than 0.015Gb + 0.20, even more preferably a value larger than 0.015Gb + 0.23, and even more preferably a value larger than 0.015Gb + 0.26. That is, it is more preferable that the above formula (1) is Dw > 0.015Gb + 0.20, even more preferably Dw > 0.015Gb + 0.23, and even more preferably Dw > 0.015Gb + 0.26. The upper limit may be Dw < 0.015Gb + 0.60, may be Dw < 0.015Gb + 0.50, or may be Dw < 0.015Gb + 0.40.

[0024] Here, the "maximum wire diameter (Dw) of the steel cord" means that when the structure of the steel cord is composed of a single wire, the wire diameter of that wire (i.e., this is the maximum wire diameter) is selected. When it is a stranded structure composed of two or more wires, the maximum wire diameter among those stranded wires is selected (in the embodiment of FIG. 6, the wire diameter of the upper left wire), and further, when comparing the respective maximum wire diameters of all the steel cords included in the belt layer 7 (in the case of two or more layers, all the belt layers 7), it means the largest wire diameter. When all the wire diameters of the plurality of wire diameters included in the belt layer 7 and the wire diameters between the belt layers 7 are the same (for example, in FIGS. 4 and 5), it means that wire diameter. Note that the wire diameter is the average wire diameter of the wire (the average value when measuring the wire diameters at any three locations).

[0025] The size of the tire of the present invention can be arbitrarily selected from, for example, 145 / 80R13, 235 / 45R19, 11R22.5, etc. Also, the application is not particularly limited, and it can be various tires such as passenger car tires, truck bus tires, off-road tires, etc.

[0026] Note that the tire of the present invention is preferably a pneumatic tire. As the gas filled in this pneumatic tire, for example, air, nitrogen, argon, an inert gas such as helium, and other gases can be used.

[0027] [Container] The tire of the present invention is provided with a container 30 on the inner surface 12 of the tire of the tread portion 1 of the tire in the above-described embodiment. The arrangement position of this container 30 is not particularly limited as long as it is the inner surface 12 of the tread portion 1, and it may be a position that does not pass through the center point in the tire width direction on the inner surface 12 of the tread portion 1.

[0028] The container 30 provided in the tire of the present invention is composed of a rubber component. And this container 30 is provided on the inner surface 12 of the tread portion 1 of the tire, and houses a functional component 20 having a sensor function for detecting tire information so as to have a contact surface 21 that contacts the inner surface 12 of the tire. For example, as shown in FIGS. 1 to 3, the base portion 31 of the container 30 is joined and fixed to the inner surface 12 of the tread portion 1 of the tire (the inner surface 12 joined to the base portion 31 is omitted in FIGS. 2 and 3). The accommodating portion 33 houses the functional component 20 so as to be surrounded by the side wall 32. Further, an embodiment is shown in which the housed functional component 20 has a contact surface 21 that contacts the inner surface 12 of the tread portion 1 of the tire via the base portion 31.

[0029] Here, the container being "provided on the inner surface of the tread portion of the tire" means that the container 30 is connected and disposed on the inner surface 12 of the tread portion 1 of the tire (the inner peripheral surface of the tire at a position facing the tread surface of the tread portion). Also, the functional component having "a contact surface that contacts the inner surface of the tire (of the tread portion)" includes not only an embodiment in which the functional component 20 has a contact surface 21 that directly contacts the inner surface 12 of the tread portion 1 of the tire, but also an embodiment in which the functional component 20 has a contact surface 21 that contacts via a member (the base portion 31 in the embodiment of FIG. 3) that is in surface contact with the inner surface 12 of the tread portion 1 of the tire in the container 30. That is, an embodiment in which the functional component 20 is in direct surface contact with the inner surface 12 of the tread portion 1 of the tire, and an embodiment in which the functional component 20 is in surface contact via a member that is in surface contact with the inner surface 12 of the tread portion 1 of the tire in the container 30 are included.

[0030] And it is more preferable that the container 30 housing the functional component 20 is fixed to the inner surface 12 of the tread portion 1 of the tire (in a state where the position of the container 30 does not substantially change). Further, an embodiment in which the container 30 is fixed to the inner surface 12 of the tread portion 1 of the tire by an adhesive is more preferable. As this adhesive, an epoxy adhesive, an acrylic adhesive, or the like can be used. Also, a double-sided tape or the like may be used as the adhesive.

[0031] Note that the container 30 provided in the tire of the present invention is composed of a rubber component as described above, but may further contain components other than the rubber component as optional components as long as it does not significantly affect the effects of the present invention. For example, various additives generally used in rubber products such as carbon black, white fillers (such as silica, talc, mica, clay, calcium carbonate, etc.), resin components (such as terpene resin, coumarone resin, indene resin, rosin resin, etc.), zinc oxide (zinc white), oil (such as aroma oil), stearic acid, wax, lecithin, anti-aging agent, plasticizer, vulcanizing agent, vulcanization accelerator, vulcanization accelerator assistant, etc. can be contained in an appropriate amount. As the vulcanizing agent, the same ones as described above can be used.

[0032] And since the restraining force of the functional parts by the container is improved and the effects of the present invention are more easily exhibited, this container 30 has a sheet-like base 31 with one surface joined to the inner surface 12 of the tire tread portion 1 as shown in FIGS. 2, 3, or 7, and a side wall 32 protruding from the surface opposite to the surface joined to the inner surface 12 of the tire of the base 31, and includes a housing portion 33 for housing the functional parts 20 so that the side wall 32 surrounds them. It is more preferable that the crown gauge (Gc), which is the thickness of the side wall 32 at the midpoint (D1 / 2) of the straight-line distance (D, that is, the shortest straight-line distance from the joining surface at the protruding end) from the surface joined to the inner surface 12 of the tire of the base 31 to the protruding end of the side wall 32 (the end with the longest shortest straight-line distance from the joining surface), and the total thickness (Gb) of the belt layer 7 described above satisfy the relationship of the following formula (2). (2) Gc ≧ 0.075Gb + 1.3

[0033] Furthermore, since the above effects are more likely to be exerted, this crown gauge (Gc) is more preferably a value of 0.075Gb + 1.5 or more, even more preferably a value of 0.075Gb + 1.9 or more, and even more preferably a value of 0.075Gb + 2.2 or more. That is, the above formula (2) is more preferably Gc ≧ 0.075Gb + 1.5, even more preferably Gc ≧ 0.075Gb + 1.9, and even more preferably Gc ≧ 0.075Gb + 2.2. This upper limit may be Gc < 0.075Gb + 3.6, may be Gc < 0.075Gb + 3.5, or may be Gc < 0.075Gb + 3.2.

[0034] Incidentally, the specific thickness of this crown gauge (Gc) is not limited, but from the viewpoint of making it difficult to reduce the productivity and durability of the container, etc., it is more preferably 1.00 mm or more, even more preferably 1.50 mm or more, even more preferably 2.10 mm or more, and even more preferably 2.50 mm or more. The upper limit may be 4.50 mm or less, may be 3.90 mm or less, or may be 3.50 mm or less.

[0035] [Functional parts] As the functional component 20 to be housed in the housing of the tire of the present invention, there is no limitation as long as it has a sensor function for detecting tire information and has a contact surface 21 that contacts the inner surface 12 of the tread portion 1 of the tire. For example, electronic components including various sensors, transmitters, receivers, control circuits, batteries, etc. are exemplified. Examples of the tire information detected and acquired by the sensor function include the internal temperature and internal pressure (air pressure) of the pneumatic tire, the wear amount of the tread portion, etc. A temperature sensor or a pressure sensor can be used for measuring the internal temperature and internal pressure. For detecting the wear amount of the tread portion, a sensor element using a piezoelectric element is disposed on the contact surface, and the sensor element detects an output voltage corresponding to the tire deformation during traveling, and a functional component 20 that detects the wear amount of the tread portion based on the output voltage is exemplified as a preferable one. That is, when the sensor function of this functional component 20 is a sensor function using a piezoelectric element as a sensor element, it is more preferable from the viewpoint of detecting the wear amount of the tread portion 1. In addition, it is also possible to use an acceleration sensor or a magnetic sensor.

[0036] In the tire of the present invention (tire with a functional component) having the above-described configuration, the sensing intensity of the sensor function of the functional component provided on the inner surface of the tread portion of the tire is excellent.

[0037] Hereinafter, embodiments of the present invention will be described. However, the present invention is not limited to the following embodiments, and various modifications are possible within the technical idea of the present invention.

Embodiment

[0038] (Fabrication and evaluation of a tire with a functional component) It has the configuration as shown in FIG. 1 and includes a two-layer belt layer in which a plurality of steel cords are embedded parallel to one surface. The total thickness (Gb) of the belt layer, the sulfur content of the belt layer (mass ratio of sulfur to 100 parts by mass of the rubber component constituting the belt layer), and the maximum wire diameter (Dw) of the steel cords embedded in the belt layer are the values shown in Table 1 below. For a tire of size 235 / 45R19 99V, a container having the shape as shown in FIGS. 2 to 3 and with the crown gauge (Gc) of the side wall of the accommodating portion being the value shown in Table 1 below is bonded and fixed to the inner surface of the tread portion of the tire with an adhesive as shown in FIG. 1. Further, a functional component using a piezoelectric element as a sensor element is mounted on the container such that the piezoelectric element is disposed on the contact surface contacting the inner surface of the tire, and a tire with various functional components is manufactured.

[0039] Then, for the obtained tires with functional components of Comparative Examples 1 to 4 and Examples 1 to 4, the sensing strength of the functional components was evaluated as follows.

[0040] <Sensing strength> For each tire with functional components, it was assembled on a wheel with an air pressure of 230 kPa and run on a drum at a speed of 30 km / h using a drum tester, and the peak height of the waveform detected by the sensor element of the functional component was measured. The results are shown in the lower part of Table 1 below. The results are expressed as an index with the value of Comparative Example 1 being 100.

[0041]

Table 1

[0042] From these results, in Examples 1 to 4 where the total thickness (Gb) of the belt layer of the tire was 2.4 mm or more, the sensing strength of the above functional components was excellent. On the other hand, in Comparative Examples 1 to 3 where the total thickness (Gb) of the belt layer of the tire was 2.2 mm or less, the sensing strength of the above functional components decreased.

Explanation of symbols

[0043] 100 Tire 1 Tread portion 2 Sidewall portion 3 Bead portion 4 Carcass layer 5 Bead core 6 Bead filler 7 Belt layer 8 Belt cover layer 9 Steel cord 11 Tire circumferential groove 12 Inner surface of the tread portion of the tire 20 Functional parts 21 Contact surface (piezoelectric element) 30 Container 31 Base portion 32 Sidewall 33 Accommodating portion

Claims

1. A tire comprising: a tread portion extending in the tire circumferential direction and forming an annular shape; a pair of sidewall portions disposed on both sides of the tread portion; and a pair of bead portions disposed on the inner side in the tire radial direction of the pair of sidewall portions, at least one carcass layer mounted between the pair of bead portions, and a belt layer disposed on the outer peripheral side of the carcass layer in the tread portion, in which a plurality of steel cords are embedded in parallel on one surface, wherein a container for accommodating functional components is provided on the inner surface of the tread portion of the tire, the functional components have at least a contact surface that contacts the inner surface of the tire and a sensor function for detecting tire information, the tire in which the total thickness (Gb) of the belt layer is 2.3 mm or more.

2. The tire according to claim 1, wherein the belt layer contains 2.0 parts by mass or more of a vulcanizing agent with respect to 100 parts by mass of the rubber component constituting the belt layer.

3. The tire according to claim 1 or 2, wherein the maximum wire diameter (Dw) of the steel cord and the Gb satisfy the relationship of the following formula (1). (1)Dw>0.015Gb+0.17

4. The container includes a sheet-like base portion having one surface joined to the inner surface of the tire, and a side wall protruding from the surface opposite to the surface joined to the inner surface of the tire of the base portion, and an accommodating portion for accommodating the functional components so that the side wall surrounds the functional components, The tire according to claim 1 or 2, wherein the crown gauge (Gc), which is the thickness of the side wall at the midpoint of the straight-line distance from the surface joined to the inner surface of the tire of the base portion to the protruding end of the side wall, and the Gb satisfy the relationship of the following formula (2). (2)Gc≧0.075Gb+1.3

5. The tire according to claim 1 or 2, wherein the container is fixed to the inner surface of the tire.

6. The tire according to claim 5, wherein the container is fixed to the inner surface of the tire by an adhesive.

7. The tire according to claim 1 or 2, wherein the sensor function of the functional component is a sensor function using a piezoelectric element as a sensor element.

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