Container with functional parts and tire

Abstract

To provide a storage body with functional component which can be prevented from being damaged while preventing falling of functional components during travelling, and a tire.SOLUTION: A storage body 1 with functional component comprises a functional component 20 for acquiring tire information, and a storage body 10 for accommodating this functional component 20. The storage body 10 has: a bottom 11 fixed to a tire inner surface; a crown part 12 projecting from the bottom 11; a storage space 13 formed by the bottom 11 and the crown part 12; and an opening 14 communicating with the storage space 13. An inclination angle θ2 of the crown part 12 to the bottom 11 to be measured on an outer wall side of the crown part 12 in the state that the functional component 20 is accommodated in the storage space 13 is smaller than an inclination angle θ1 of the crown part 12 to the bottom 11 to be measured on the outer wall side of the crown part 12 in the state the functional component 20 is not accommodated in the storage space 13, and an angular difference (θ1-θ2) thereof falls within a range of is 5° to 15°.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a container with functional parts and a tire, and more particularly to a container with functional parts and a tire that can prevent the functional parts from falling off while driving, while preventing damage to the container that houses the functional parts. [Background technology]

[0002] Functional components (e.g., sensor units including sensors) that acquire internal tire information such as internal pressure and temperature are installed on the inner surface of a tire (see, for example, Patent Documents 1 and 2). When installing the functional components, a container made of rubber or the like is attached to the inner surface of the tire, and the functional components are housed inside the attached container. However, if the functional components are not sufficiently restrained by the container when housed in the container, for example, if there is a large gap between the functional components and the container, there is a problem that the functional components may fall off during driving. Furthermore, if the functional components are sufficiently restrained by the container but the restraining force is excessively strong, for example, if the container is excessively deformed when the functional components are housed in it, there is a problem that cracks may occur in the container during use. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6272225 [Patent Document 2] Special Publication No. 2016-505438 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a container with functional parts and a tire that can prevent the functional parts from falling off while driving, while preventing damage to the container that houses the functional parts. [Means for solving the problem]

[0005] In order to achieve the above-mentioned object, the functional part-equipped container of the present invention is a container with functional parts comprising a functional part for acquiring tire information and a container that accommodates the functional part, wherein the container has a bottom that is fixed to the inner surface of the tire, a crown that protrudes from the bottom, a storage space formed by the bottom and the crown, and an opening that communicates with the storage space, and wherein the inclination angle of the crown part with respect to the bottom measured on the outer wall side of the crown part when the functional part is accommodated in the storage space is smaller than the inclination angle of the crown part with respect to the bottom measured on the outer wall side of the crown part when the functional part is not accommodated in the storage space, and the angle difference is in the range of 5° to 15°.

[0006] The tire of the present invention is characterized in that the above-mentioned functional part-equipped container is fixed to the inner surface of the tire, and the functional part is housed in the housing space. [Effects of the Invention]

[0007] The present invention provides a functional component-equipped container that includes a functional component for acquiring tire information and a container that accommodates the functional component. The container has a bottom that is fixed to the tire's inner surface, a crown that protrudes from the bottom, a storage space formed by the bottom and the crown, and an opening that communicates with the storage space. The inclination angle of the crown relative to the bottom, measured on the outer wall of the crown when the functional component is accommodated in the storage space, is smaller than the inclination angle of the crown relative to the bottom, measured on the outer wall of the crown when the functional component is not accommodated in the storage space. This prevents excessive deformation of the container when the functional component is accommodated while ensuring sufficient restraint force for the functional component. In particular, when the difference in the inclination angle before and after accommodating the functional component is in the range of 5° to 15°, a good balance is achieved between the restraint force of the container relative to the functional component and the degree of deformation that does not damage the container. This prevents the functional component from falling off while driving and prevents damage to the container.

[0008] In the case of the functional part-equipped container of the present invention, the inclination angle of the crown portion relative to the bottom, measured from the outer wall side of the crown portion when the functional part is housed in the housing space, is preferably 90° or more. This reduces stress concentration at the base of the crown portion of the container, improving the durability of the container. Furthermore, the opening of the container is not excessively narrowed, making it convenient for removing the functional part.

[0009] The thickness Ga of the crown portion when the functional component is accommodated in the accommodation space is preferably 1.0 mm to 3.5 mm. This can prevent cracks from occurring in the crown portion of the enclosure and improve the durability of the enclosure. Furthermore, if the crown portion of the enclosure is too thick, the enclosure will generate a lot of heat, but if the thickness Ga is within the above range, the enclosure will generate less heat and the housing of the functional component will be prevented from being damaged.

[0010] The width of the opening is narrower than the minimum width of the storage space, and the perimeter of the upper part of the storage space is D2 u and the perimeter D1 of the upper part of the functional part u and 0.60≦D2 u / D1 u It is preferable that the relationship of ≦0.95 is satisfied. This increases the restraining force of the housing on the functional parts and suppresses movement of the functional parts, preventing damage to the housing of the functional parts when traveling at high speeds. Furthermore, a good balance is achieved between the restraining force of the housing on the functional parts and the degree of deformation that does not cause damage to the housing, preventing damage to the housing.

[0011] The end of the crown portion has a locking portion bent toward the opening, and it is preferable that the height H1 of the functional part and the total inner height H2 of the housing satisfy the relationship 0.85≦H2 / H1≦0.98, which provides a good balance between the housing's restraining force on the functional part and the degree of deformation that does not damage the housing, improving the durability of the functional part during high-speed driving.

[0012] Circumference of the container opening D2 O and the perimeter D1 of the upper part of the functional part u That is, 0.4≦D2 O / D1 u It is preferable that the relationship of ≦0.8 is satisfied. This provides a good balance between the restraining force of the housing on the functional part and the degree of deformation that does not cause damage to the housing, thereby improving the durability of the functional part during high-speed driving. Furthermore, the opening of the housing does not become excessively narrow, which is also suitable for removing the functional part.

[0013] Preferably, the modulus of the housing at 100% elongation at 20°C is 0.5 MPa or more and less than 10.0 MPa, and the loss modulus of the housing at 60°C is 0.4 MPa or more and less than 20.0 MPa. By appropriately setting the modulus in this way, it is possible to achieve both durability of the housing and ease of housing a functional component in the housing. Furthermore, by appropriately setting the loss modulus in this way, it is possible to prevent damage to the housing of the functional component caused by friction of the functional component against the housing or repeated deformation of the housing.

[0014] The container is preferably made of vulcanized rubber and is preferably fixed to the inner surface of the tire with an adhesive.

[0015] The tire of the present invention is preferably a pneumatic tire, but may also be a non-pneumatic tire. In the case of a pneumatic tire, the interior thereof can be filled with air, an inert gas such as nitrogen, or other gases. [Brief explanation of the drawings]

[0016] [Figure 1] (A) to (D) illustrate embodiments of a container with functional components before and after the functional components are accommodated, where (A) is an oblique view of a state in which no functional components are accommodated, (B) is a cross-sectional view of a state in which no functional components are accommodated, (C) is an oblique view of a state in which functional components are accommodated, and (D) is a cross-sectional view of a state in which functional components are accommodated. [Figure 2]10(A) to 10(C) are half cross-sectional views of a housing with functional parts for explaining the dimensions of the housing. [Figure 3] 1 is a meridian cross-sectional view illustrating an embodiment of a pneumatic tire in which a functional component-equipped container is fixed to the tire inner surface. [Figure 4] 4 is an enlarged cross-sectional view of the functional component-equipped container of FIG. 3. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments of a container with functional parts of the present invention will be described in detail with reference to the accompanying drawings. The container with functional parts 1 illustrated in Figures 1(A) to 1(D) includes a functional part 20 for acquiring tire information and a container 10 that houses the functional part 20. The container with functional parts 1 in Figures 1(A) and 1(B) shows a state in which the functional part 20 is not housed in the container 10, while the container with functional parts 1 in Figures 1(C) and 1(D) shows a state in which the functional part 20 is housed in the container 10.

[0018] The storage body 10 has a flat bottom 11 fixed to the inner surface of the tire, a cylindrical crown 12 protruding from the bottom 11, a storage space 13 formed by the bottom 11 and the crown 12, and an opening 14 communicating with the storage space 13.

[0019] The bottom portion 11 is the longest (has the largest diameter) of all the components constituting the housing body 10. The crown portion 12 is formed so as to slope inward from a direction perpendicular to the bottom portion 11. Therefore, the housing space 13 formed by the bottom portion 11 and the crown portion 12 has a substantially trapezoidal cross-sectional shape. That is, the cross-sectional width of the housing space 13 gradually decreases toward the upper portion and is narrowest at the maximum height. The crown portion 12 has a locking portion 12e at one end 12a that is bent toward the opening 14, and the other end 12b is fixed to the bottom portion 11. After the functional component 20 is accommodated, the locking portion 12e abuts against the upper surface of the functional component 20, thereby fixing the functional component 20 in place. The width of the opening 14, into which the functional component 20 is inserted, is narrower than the minimum cross-sectional width of the housing space 13 (the width at a position adjacent to the opening 14).

[0020] 1, the bottom 11, crown 12, and opening 14 all have a circular planar shape, and the storage space 13 has a truncated cone shape. The planar shapes of the bottom 11, crown 12, and opening 14 are not particularly limited, and they may be configured with any other planar shape, or may be configured with planar shapes different from each other. The shape of the storage space 13 is also not particularly limited.

[0021] As shown in FIG. 1(D), the functional component 20 includes a housing 21 and an electronic component 22. The housing 21 has a hollow structure and houses the electronic component 22 therein. The electronic component 22 can be configured to include a sensor 23, a transmitter, a receiver, a control circuit, a battery, and the like for acquiring tire information. Examples of tire information acquired by the sensor 23 include the internal temperature and pressure of the pneumatic tire, and the amount of tread wear. For example, a temperature sensor or a pressure sensor is used to measure the internal temperature and pressure. To detect the amount of tread wear, a piezoelectric sensor having a piezoelectric element can be used as the sensor 23. The piezoelectric element detects an output voltage corresponding to tire deformation during driving, and the amount of tread wear is detected based on the output voltage. Alternatively, an acceleration sensor or a magnetic sensor can be used. The functional component 20 is also configured to transmit the tire information acquired by the sensor 23 to an external device. Furthermore, in order to make it easier to grip the functional part 20, a knob protruding from the top surface of the housing 21 may be provided, and this knob may also have the function of an antenna.

[0022] 1(D) is an example, and is not intended to be limiting. The sensor 23 may be fixed to the housing 10 with adhesive tape, glue, or the like, or may not be fixed to the housing 10.

[0023] In such a functional-component-equipped container 1, the inclination angle θ2 of the crown portion 12 with respect to the bottom portion 11 when the functional component 20 is accommodated in the accommodation space 13 is configured to be smaller than the inclination angle θ1 of the crown portion 12 with respect to the bottom portion 11 when the functional component 20 is not accommodated in the accommodation space 13. These inclination angles θ1 and θ2 are both angles measured on the outer wall side of the crown portion 12. When the functional component 20 is accommodated in the accommodation space 13 through the opening 14, the crown portion 12 tilts outward, and the opening 14 deforms so as to expand in width, thereby reducing the inclination angle θ of the crown portion 12 with respect to the bottom portion 11. The angle difference (θ1 - θ2) between the inclination angle θ1 before accommodating the functional component 20 and the inclination angle θ2 after accommodating the functional component 20 is configured to be in the range of 5° to 15°.

[0024] Here, when measuring the inclination angle θ (θ1, θ2) of the crown portion 12, the angle can be calculated using a CT scan or the like. Furthermore, only when measuring the inclination angle θ of the crown portion 12, as shown in FIG. 2(A), a line L1 passing through two points on the outer surface of the crown portion 12, at 1 / 2 (0.5 × H) and 1 / 4 (0.25 × H) of the total height H of the housing body 10, is considered to be the crown portion 12, and the inclination angle θ1 before the functional component 20 is accommodated and the inclination angle θ2 after the functional component 20 is accommodated are measured. The total height H (maximum height H) of the housing body 10 changes before and after the functional component 20 is accommodated, and the inclination angle θ (θ1, θ2) of the crown portion 12 is measured based on these heights. Furthermore, if a protrusion is formed on the outer surface of the crown portion 12 at the 1 / 2 and / or 1 / 4 position of the total height H of the housing body 10, the inclination angle θ of the crown portion 12 is measured based on a line defined using the lower end of the protrusion as a new reference point, excluding the protrusion. The total height H of the container 10 is the height from the lower surface of the bottom 11 to the upper surface of the locking portion 12e.

[0025] The above-mentioned container with functional part is a container with functional part that includes a functional part 20 for acquiring tire information and a container 10 that contains the functional part 20, wherein the container 10 has a bottom 11 that is fixed to the inner surface of the tire, a crown part 12 that protrudes from the bottom 11, a container space 13 formed by the bottom 11 and the crown part 12, and an opening 14 that communicates with the container space 13, and the inclination angle θ2 of the crown part 12 with respect to the bottom 11 measured on the outer wall side of the crown part 12 when the functional part 20 is contained in the container space 13 is smaller than the inclination angle θ1 of the crown part 12 with respect to the bottom 11 measured on the outer wall side of the crown part 12 when the functional part 20 is not contained in the container space 13, so that in the container 10 when the functional part 20 is contained, excessive deformation can be prevented while ensuring a restraining force that is sufficient to restrain the functional part 20. In particular, when the difference in the inclination angle (θ1-θ2) between before and after housing the functional component 20 is in the range of 5° to 15°, there is an excellent balance between the restraining force of the housing body 10 on the functional component 20 and the degree of deformation that does not cause damage to the housing body 10. This makes it possible to prevent the functional component 20 from falling off while traveling, while also preventing damage to the housing body 10.

[0026] Here, if the difference in the inclination angles (θ1-θ2) is less than 5°, the restraining force of the housing body 10 on the functional part 20 decreases, increasing the risk that the functional part 20 will fall off while driving, and the movement of the functional part 20 will increase, reducing the durability of the housing body 10. Conversely, if the difference in the inclination angles (θ1-θ2) is greater than 15°, deformation of the housing body 10 will become excessively large, making it more likely that cracks will occur in the housing body 10 during long-distance driving.

[0027] In the above-described housing with functional parts, the inclination angle θ2 of the crown portion 12 relative to the bottom portion 11 when the functional parts 20 are housed in the housing space 13 is preferably 90° or more, and more preferably in the range of 90° to 115°. By appropriately setting the inclination angle θ2 after the functional parts 20 are housed in this manner, stress concentration at the base of the crown portion 12 of the housing 10 can be alleviated, thereby improving the durability of the housing 10. Furthermore, the opening 14 of the housing 10 is not excessively narrowed, which is convenient when removing the functional parts 20.

[0028] If the inclination angle θ2 after the functional component 20 is accommodated is less than 90°, stress concentration at the base of the crown portion 12 of the housing body 10 increases, and strain energy during travel increases, making it easier for cracks to occur at the base of the crown portion 12. On the other hand, if the inclination angle θ2 after the functional component 20 is accommodated is greater than 115°, the crown portion 12 remains excessively tilted even after the functional component 20 is accommodated, causing the width of the opening 14 to become excessively narrow, making it difficult to remove the functional component 20.

[0029] Furthermore, when the functional component 20 is accommodated in the accommodation space 13, the thickness Ga of the crown portion 12 is preferably 1.0 mm to 3.5 mm. Here, as shown in Fig. 2(B), half the height H of the accommodation body 10 after accommodating the functional component 20 is defined as h, and a range of ±30% (0.3 x h) of the height h is defined as a central range C, based on the position of this height h (center position). In this case, it is preferable that the thickness Ga of the crown portion 12 measured in the horizontal direction be in the range of 1.0 mm to 3.5 mm throughout the entire central range C.

[0030] By setting the thickness Ga of the crown portion 12 to an appropriate value in this manner, it is possible to suppress the occurrence of cracks in the crown portion 12 of the housing 10 and improve the durability of the housing 10. Furthermore, if the thickness Ga of the crown portion 12 of the housing 10 is excessively large, the housing 10 will generate a large amount of heat, but if the thickness Ga is within the above range, it is possible to suppress the heat generation of the housing 10 and prevent damage to the housing 21 of the functional component 20.

[0031] Here, if the thickness Ga of the crown portion 12 is less than 1.0 mm, the thickness Ga of the crown portion 12 is excessively thin, and cracks are likely to occur in the crown portion 12. Conversely, if the thickness Ga of the crown portion 12 is greater than 3.5 mm, heat generation in the housing 10 (e.g., rubber) increases, and the housing 21 of the functional component 20 is likely to be damaged.

[0032] The end 12a of the crown portion 12 has a locking portion 12e bent toward the opening 14, and the height H1 of the functional component 20 and the total interior height H2 of the housing 10 preferably satisfy the relationship 0.85≦H2 / H1≦0.98. Here, as shown in FIG. 2(B), the height H1 of the functional component 20 is the maximum height of the functional component 20 within the housing 10 after the functional component 20 is housed therein; in other words, the maximum height of the functional component 20 within the housing space 13. This means that, for example, if a tab provided on the top of the functional component 20 protrudes from the housing space 13, the height H1 of the functional component 20 does not include the height of the portion of the tab outside the housing space 13. The total interior height H2 of the housing 10 is the height from the upper surface of the bottom 11 to the lower surface of the locking portion 12e before the functional component 20 is housed therein.

[0033] By appropriately setting the height H1 of the functional part 20 and the total inner height H2 of the container 10 in this manner, a good balance is achieved between the restraining force of the container 10 on the functional part 20 and the degree of deformation that does not cause damage to the container 10, thereby improving the durability of the functional part 20 when driving at high speeds.

[0034] If the ratio H2 / H1 is less than 0.85, the locking portion 12e cannot accommodate the functional component 20 so as to cover it, which reduces the effect of improving the durability of the functional component 20 during high-speed driving. Conversely, if the ratio H2 / H1 is greater than 0.98, the restraining force of the housing body 10 weakens, which increases the movement of the functional component 20 within the housing body 10, making it impossible to obtain the effect of improving the durability of the functional component 20 during high-speed driving.

[0035] The width of the opening 14 is narrower than the minimum width of the storage space 13, and the perimeter D2 of the upper part of the storage space 13 is u and the perimeter D1 of the upper part of the functional part 20 u That is, 0.60≦D2 u / D1 u It is preferable that the relationship of ≦0.95 is satisfied. That is, the circumferential length D2 of the accommodation space 13 u The perimeter of the functional part 20 is D1 u The purpose of this is to increase the restraining force of the housing body 10 by setting the perimeter D2 of the housing space 13 to be smaller than the perimeter D2 of the housing space 13 within a specific range. u 2(C), before the functional component 20 is accommodated, the height h2 is defined as 3 / 4 (0.75×H2) of the total inner height H2 of the accommodation body 10, and the perimeter of the accommodation space 13 is measured at three positions: the position at this height h2 and a position equivalent to ±25% (0.25×h2) of the height h2 from the position of height h2, and the perimeter D1 of the upper part of the functional component 20 is calculated by averaging the perimeters measured at these three positions. u is obtained by measuring the perimeter of the functional component 20 at positions corresponding to the above three positions on the functional component 20 and averaging the perimeters measured at these three positions.

[0036] In this way, the perimeter D2 of the accommodation space 13 u and the perimeter D1 of the functional part 20 u By appropriately setting this, the restraining force of the housing 10 on the functional parts 20 can be increased and the movement of the functional parts 20 can be suppressed, thereby preventing damage to the housings 21 of the functional parts 20 when traveling at high speeds. Furthermore, since there is a good balance between the restraining force of the housing 10 on the functional parts 20 and the degree of deformation that does not cause damage to the housing 10, damage to the housing 10 can also be prevented.

[0037] Here, the ratio D2 u / D1 u If the ratio D2 is less than 0.60, the restraining force of the tire housing 10 increases, but the degree of deformation of the crown portion 12 also increases, so that cracks may occur in the tire housing 10 during long-distance driving, increasing the possibility of the tire housing 10 being damaged. u / D1 uIf is greater than 0.95, the restraining force of the housing 10 becomes smaller and the movement of the functional component 20 within the housing 10 becomes larger, which increases heat generation due to friction between the housing 10 and the functional component 20, leading to damage to the housing 21 of the functional component 20.

[0038] Furthermore, the perimeter D2 of the opening 14 of the container 10 O and the perimeter D1 of the upper part of the functional part 20 u That is, 0.4≦D2 O / D1 u It is preferable that the relationship of ≦0.8 is satisfied. O is the perimeter of the opening 14 measured when the functional component 20 is not housed in the container 10. In this way, the perimeter D2 of the opening 14 O and the perimeter D1 of the functional part 20 u By appropriately setting this, a good balance is achieved between the restraining force of the housing 10 on the functional part 20 and the degree of deformation that does not cause damage to the housing 10, thereby improving the durability of the functional part 20 during high-speed driving. Furthermore, the opening 14 of the housing 10 is not excessively narrowed, which is also suitable for removing the functional part 20.

[0039] Here, the ratio D2 O / D1 u If the ratio D2 is less than 0.4, the opening 14 becomes too narrow, making it difficult to remove the functional component 20. O / D1 u If is greater than 0.8, the restraining force of the housing 10 becomes smaller and the movement of the functional component 20 within the housing 10 becomes larger, so that friction between the housing 10 and the functional component 20 increases heat generation, leading to damage to the housing 21 of the functional component 20.

[0040] In the above-described housing with functional parts, housing 10 can be made of rubber, elastomer, resin, or the like. The material constituting housing 10 preferably has the following physical properties: the modulus of housing 10 at 100% elongation at 20°C is preferably 0.5 MPa or more and less than 10.0 MPa, and the loss modulus of housing 10 at 60°C is preferably 0.4 MPa or more and less than 20.0 MPa. By appropriately setting the modulus in this manner, both durability of housing 10 and ease of housing functional parts 20 in housing 10 can be achieved. Furthermore, by appropriately setting the loss modulus in this manner, damage to housing 21 of functional parts 20 caused by friction of functional parts 20 against housing 10 or repeated deformation of housing 10 can be prevented.

[0041] Furthermore, it is more preferable that the constituent material of the container 10 has the following physical properties: The breaking elongation measured in accordance with JIS K6251 is preferably 80% to 800% at 20°C, and the tan δ measured in accordance with JIS K6394 is preferably 0.04 to 0.40 at 60°C.

[0042] Fig. 3 shows a pneumatic tire in which a functional component-equipped container is fixed to the inner surface of the tire. As shown in Fig. 3, the pneumatic tire T has a tread portion t extending in the tire circumferential direction and forming an annular shape, a pair of sidewall portions s disposed on both sides of the tread portion t, and a pair of bead portions b disposed radially inward of the sidewall portions s.

[0043] A carcass layer 4 is mounted between the pair of bead portions b. This carcass layer 4 includes a plurality of reinforcing cords extending in the tire radial direction, and is folded back from the inside to the outside of the tire around a bead core 5 arranged in each bead portion b. A bead filler 6 made of a rubber composition and having a triangular cross section is arranged on the outer periphery of the bead core 5. An inner liner layer 9 is arranged in the region between the pair of bead portions b on the tire inner surface Ts. This inner liner layer 9 forms the tire inner surface Ts.

[0044] On the other hand, multiple belt layers 7 are embedded on the outer peripheral side of the carcass layer 4 in the tread portion t. These belt layers 7 include multiple reinforcing cords that are inclined with respect to the tire circumferential direction, and are arranged so that the reinforcing cords cross each other between the layers. In the belt layers 7, the inclination angle of the reinforcing cords with respect to the tire circumferential direction is set to a range of 10° to 40°, for example. Steel cords are preferably used as the reinforcing cords of the belt layers 7. At least one belt cover layer 8 is arranged on the outer peripheral side of the belt layer 7, with the aim of improving high-speed durability, and the reinforcing cords are arranged at an angle of, for example, 5° or less with respect to the tire circumferential direction. As the reinforcing cords of the belt cover layer 8, organic fiber cords such as nylon and aramid are preferably used.

[0045] The above-described tire internal structure is a typical example of a pneumatic tire, but is not limited to this.

[0046] In the pneumatic tire, at least one functional part-equipped container 1 is attached to the tire inner surface Ts. The functional part-equipped container 1 is fixed to the tire inner surface Ts by an adhesive. This adhesive has a storage modulus of 5.0×10 at −40° C. 8 Pa~1.0×10 10 Pa range, and the storage modulus at 150°C is 1.0×10 6 Pa ~ 5.0 × 10 7 It is preferable that the storage modulus is in the range of 100 Pa. Examples of adhesives having such physical properties include instant adhesives, epoxy adhesives, acrylic adhesives, rubber adhesives, and urethane adhesives. By appropriately setting the storage modulus of the adhesive as described above, it is possible to prevent the container 10 from falling off due to repeated deformations and loads applied while the tire is running. Furthermore, it is possible to sufficiently ensure the durability of the container 10 even if heat is generated during running.

[0047] Furthermore, the container 1 with functional parts can be attached to any part of the tire inner surface Ts, but since it is less likely to deform during driving and is less likely to come off due to the application of centrifugal force, it is preferable to attach it to the tire inner surface Ts corresponding to the tread portion t, among the tread portion t, sidewall portion s, and bead portion b.

[0048] 4, when measuring the inclination angles θ1 and θ2 with the container 1 with functional parts fixed to the tire inner surface, the angle formed by the straight line L2 passing through the other end portions 12b of the crown portions 12 on both sides in a cross-sectional view and the crown portion 12 is measured. Also, for example, even if there is no member equivalent to the bottom portion and the container with functional parts has the crown portion directly fixed to the tire inner surface, the measurement can be performed in the same manner as above.

[0049] In the above-described embodiment, an example has been described in which the functional component-equipped container is attached to a pneumatic tire, but the present invention is not limited to this and can also be applied to a non-pneumatic tire. [Example]

[0050] The tire size is 225 / 45ZR18, and the tire is provided with a functional part for acquiring tire information and a housing for housing the functional part, the housing having a bottom portion fixed to the inner surface of the tire, a crown portion protruding from the bottom portion, a housing space formed by the bottom and the crown portion, and an opening portion communicating with the housing space, and the housing with the functional part housed in the housing is fixed to the inner surface of the tire, and the inclination angle θ1 of the crown portion before housing, the inclination angle θ2 of the crown portion after housing, the angle difference between the inclination angles before and after housing (θ1-θ2), the thickness Ga of the crown portion, and the ratio D2 u / D1 u , ratio H2 / H1, ratio D2О / D1 u The values ​​were set as shown in Tables 1 and 2, and tires of Conventional Examples 1 and 2 and Examples 1 to 23 were manufactured.

[0051] These test tires were evaluated for the presence or absence of detachment of functional parts, ease of removal, and high-speed durability using the following test methods, as well as for the crack resistance and durability of the housing. The results are shown in Tables 1 and 2.

[0052] Whether or not there is any missing parts (functional parts): Each test tire was mounted on a wheel with a rim size of 18x7 1 / 2JJ, and a running test was conducted using a drum testing machine under conditions of a temperature of -20°C, an air pressure of 160kPa, and a running speed of 81km, with a load of 88% of the maximum load at an air pressure of 200kPa. Specifically, one cycle consisted of running under the above conditions, then leaving the tire to cool for a certain period of time. After 50 cycles of this, the tire was visually inspected for any loss of functional parts. The evaluation results indicated whether or not any functional parts had fallen off.

[0053] Removability (functional parts): For each test tire's functional part-equipped container, the task of removing the functional part inserted into the container was repeated 10 times, and the time required for each removal task was measured. The evaluation results were shown on a three-point scale: if the time required for each of the 10 attempts was within 20 seconds, it was indicated as "◎ (excellent)", if the time required for each of the 10 attempts was more than 20 seconds but less than 60 seconds, it was indicated as "○ (good)", and if the time required for each of the 10 attempts was more than 60 seconds, it was indicated as "× (unacceptable)".

[0054] High-speed durability (functional parts): Each test tire was mounted on a wheel with a rim size of 18 x 7 1 / 2JJ, and a running test was conducted using a drum testing machine under conditions of a load of 88% of the maximum load capacity and an air pressure of 360 kPa. Specifically, the speed was increased by 10 km / h every 10 minutes from an initial speed of 120 km / h, and the tire was run until damage to the housing of the functional parts occurred, and the running distance was measured. The evaluation results were expressed as an index, with the measured value for Conventional Example 1 being 100. A higher index value indicates better high-speed durability.

[0055] Crack resistance (housing): Each test tire was mounted on a wheel with a rim size of 18x7.5JJ and aged in an oxygen atmosphere at 80°C for five days. Afterward, a running test was conducted using a drum tester under conditions of 80% of the maximum load capacity and an air pressure of 250 kPa. Specifically, the speed was increased by 10 km / h every 24 hours from an initial speed of 120 km / h until a speed of 170 km / h was reached, after which the tire was visually inspected for cracks or wrinkles. The evaluation results were categorized into three levels: "Excellent" for no cracks or wrinkles, "Good" for wrinkles only, and "Poor" for cracks.

[0056] Durability (container): Each test tire was mounted on a wheel with a rim size of 18 x 7 1 / 2JJ, and a running test was carried out using a drum testing machine under the conditions of an air pressure of 540 kPa, 160% of the maximum load, a running speed of 81 km, and a running distance of 20,000 km. After that, the occurrence of breakage and cracks in the housing was visually inspected, and the total number of occurrences was counted. The evaluation results were expressed as an index using the reciprocal of the measurement value, with Conventional Example 1 being 100. The higher the index value, the better the durability.

[0057] [Table 1]

[0058] [Table 2]

[0059] As can be seen from Tables 1 and 2, the pneumatic tires of Examples 1 to 23 were improved in terms of whether or not functional parts fell off and in terms of crack resistance of the housing compared to Conventional Example 1. In particular, the pneumatic tires of Examples 20 to 23 were improved in terms of ease of removing functional parts compared to Conventional Example 1. The pneumatic tires of Examples 1 to 23 were improved in terms of high-speed durability of functional parts and durability of the housing compared to Conventional Example 1.

[0060] On the other hand, in Conventional Example 2, since the difference in the tilt angle (θ1-θ2) before and after storage was large, the crack resistance of the storage body deteriorated, although the functional parts did not fall off. [Explanation of symbols]

[0061] 1. Housing with functional parts 10 Containment Unit 11 Bottom 12 Crown part 13 Containment Space 14 Openings 20 Functional parts T Pneumatic tire Ts tire inner surface t Tread s Sidewall b Bead part

Claims

1. A functional part-equipped container including a functional part for acquiring tire information and a container for accommodating the functional part, the storage body has a bottom portion fixed to the tire inner surface, a crown portion protruding from the bottom portion, a storage space formed by the bottom portion and the crown portion, and an opening portion communicating with the storage space, A container with functional parts, characterized in that the inclination angle of the crown part relative to the bottom measured on the outer wall side of the crown part when the functional part is housed in the housing space is smaller than the inclination angle of the crown part relative to the bottom measured on the outer wall side of the crown part when the functional part is not housed in the housing space, and the angle difference is in the range of 5° to 15°.

2. 2. A container with functional parts as described in claim 1, characterized in that when the functional parts are contained in the containing space, the inclination angle of the crown part relative to the bottom measured on the outer wall side of the crown part is 90° or more.

3. 3. The container with functional parts according to claim 1, wherein a thickness Ga of the crown portion when the functional parts are housed in the housing space is 1.0 mm to 3.5 mm.

4. The width of the opening is narrower than the minimum width of the storage space, and the perimeter D2 of the upper part of the storage space u and the perimeter D1 of the upper part of the functional component u and 0.60≦D2 u / D1 u 4. The container with functional parts according to claim 1, wherein the relationship of ≦0.95 is satisfied.

5. A container with functional parts as described in any one of claims 1 to 4, characterized in that the end of the crown portion has a locking portion bent toward the opening, and the height H1 of the functional part and the total inner height H2 of the container satisfy the relationship 0.85≦H2 / H1≦0.

98.

6. The perimeter D2 of the opening of the container O and the perimeter D1 of the upper part of the functional component u and 0.4≦D2 O / D1 u 6. The container with functional parts according to claim 1, wherein the relationship of ≦0.8 is satisfied.

7. A housing with functional parts according to any one of claims 1 to 6, characterized in that the housing has a modulus at 100% elongation at 20°C of 0.5 MPa or more and less than 10.0 MPa, and a loss modulus at 60°C of 0.4 MPa or more and less than 20.0 MPa.

8. 8. The container with functional parts according to claim 1, wherein the container is made of vulcanized rubber.

9. 9. The container with functional parts according to claim 1, wherein the container is fixed to the inner surface of the tire with an adhesive.

10. A tire, characterized in that the functional part-equipped container according to any one of claims 1 to 9 is fixed to the tire inner surface, and the functional part is housed in the housing space.

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