Container with functional parts and tire

Abstract

To provide a storage body with a functional component which prevents detachment of a functional component by increasing holding power of the functional component by devising an internal shape of a storage body for storing the functional body, and can avoid a deterioration in the durability of the storage body while facilitating storage work of the functional body to the storage body, and a tire.SOLUTION: In a storage body 1 with a functional component including a functional component 20 for acquiring tire information, and a storage body 10 for storing the functional component 20, the storage body 10 includes a bottom 11 fixed to a tire inner surface, a side wall part 12 projecting from the bottom 11, a storage part 13 formed by the bottom 11 and the side wall part 12, and an opening 14 communicating with the storage part 13, and at least a portion of an inner wall surface 12x of the side wall part 12 has an uneven region 15 composed of a plurality of protrusion parts 15a and / or recessed parts 15b.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a container with functional parts and a tire, and more specifically to a container with functional parts and a tire in which the internal shape of the container that houses the functional parts is devised to increase the holding force of the functional parts, prevent the functional parts from falling off, and make it possible to avoid deterioration of the durability of the container while facilitating the work of housing the functional parts in the container. [Background technology]

[0002] Functional components (e.g., sensor units including sensors) that acquire internal tire information such as tire 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 (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. During this process, the container elastically deforms and presses against the wall of the housing of the functional components, generating frictional force that holds the functional components inside the container. However, if this frictional force is excessively small, the container's ability to hold the functional components is weak, resulting in problems such as the functional components falling off the container when the tire receives a strong impact, or excessive movement of the functional components inside the container, resulting in increased heat generation. On the other hand, if the frictional force is excessively large, problems such as the functional components being difficult to install in the container, or the functional components being fixed in an unintended position when installed, which places a heavy load on the container and reduces its durability. [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] The object of the present invention is to provide a container with functional parts and a tire that, by devising the internal shape of the container that houses the functional parts, increases the holding force of the functional parts, prevents the functional parts from falling off, makes it easy to store the functional parts in the container, and avoids a deterioration in the durability of the container. [Means for solving the problem]

[0005] To achieve the above object, the container with functional parts of the present invention is a container with functional parts that includes a functional part for acquiring tire information and a container that houses the functional part, wherein the container has a bottom that is fixed to the inner surface of the tire, a side wall that protrudes from the bottom, a container formed by the bottom and the side wall, and an opening that communicates with the container, and is characterized in that at least a portion of the inner wall surface of the side wall has an uneven area consisting of a plurality of convex and / or concave parts. (However, this does not include a container with functional parts in which the concave and convex areas consisting of the convex and / or concave portions and the housing of the functional parts fit together.) .

[0006] The tire of the present invention is characterized in that the functional part-equipped container is fixed to the inner surface of the tire, and the functional part is housed in the housing. [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 inner surface of the tire, sidewalls that protrude from the bottom, a container formed by the bottom and the sidewalls, and an opening that communicates with the container. At least a portion of the inner surface of the sidewalls has a concave-convex region consisting of multiple protrusions and / or recesses. When the functional component is accommodated in the container, the contact area between the surface of the functional component and the inner surface of the sidewalls of the container is reduced compared to when the concave-convex region is not present. This reduces the frictional force at the contact surface between the surface of the functional component and the inner surface of the sidewalls of the container, thereby allowing for appropriate adjustment of the frictional force. This ensures sufficient retention of the functional component while preventing the functional component from falling off or excessive movement. This also facilitates the operation of accommodating the functional component in the container, while preventing excessive load from being applied to the container when the functional component is accommodated, thereby avoiding a deterioration in the durability of the container.

[0008] In the case of the functional part-equipped container of the present invention, the maximum height Rz from the deepest concave portion to the highest convex portion in the concave-convex region is preferably 10 μm to 2000 μm, thereby increasing the holding force of the functional parts and effectively preventing the functional parts from falling off or moving excessively, facilitating the process of accommodating the functional parts in the container, and preventing excessive load from being applied to the container when the functional parts are accommodated, thereby avoiding a deterioration in the durability of the container.

[0009] When a plane parallel to the inner wall surface of the side wall portion having a height half the maximum height Rz from the concave portion where the depth is greatest to the convex portion where the height is greatest in the uneven region is defined as a reference plane S, it is preferable that the total cross-sectional area A, which is the sum of the cross-sectional areas of the convex portions on the reference plane S, and the area As of the reference plane S satisfy the relationship 0.2≦A / As≦0.8. This ensures an appropriate frictional force between the surface of the functional component and the contact surface of the side wall portion of the container.

[0010] It is preferable that at least a portion of the uneven region is formed in a range of height equal to or less than half the height hb of the housing section on the inner wall surface of the side wall. This makes it easier to house the functional components in the housing, effectively improving the work of housing the functional components. In particular, when the uneven region is not provided on the upper half of the side wall, the lower half of the side wall where the uneven region is provided can ensure the holding force of the functional components, and the movement of the functional components inside the housing can be suppressed, thereby reducing heat generation.

[0011] It is preferable that the area A1 of the concave-convex region and the area A0 of the lower half of the inner wall surface of the side wall satisfy the relationship 0.5≦A1 / A0≦1.0, thereby ensuring an appropriate frictional force between the surface of the functional component and the contact surface of the side wall of the container.

[0012] It is preferable that at least a portion of the uneven region is formed continuously from the lower half of the inner wall surface of the side wall portion to the upper end of the housing portion. When a functional component is placed in the housing, the functional component and the side wall portion of the housing are in close contact with each other, which can cause air to remain between the housing and the functional component (for example, between the functional component and the bottom), preventing the functional component from being inserted in the appropriate position. In contrast, by providing the uneven region as described above, the uneven region formed continuously to the upper end of the housing portion functions as an air passage, allowing the remaining air to be released through the continuous uneven region, allowing the functional component to be inserted in the appropriate position. This improves the work of placing functional components.

[0013] The convex and / or concave portions constituting the concave-convex region are preferably made of vulcanized rubber having a modulus at 100% elongation of 1.0 MPa or more and less than 12.0 MPa, which allows for both durability of the housing body and ease of housing the functional component in the housing body.

[0014] The inclination angle of the side wall relative to the bottom, measured on the outer wall side of the side wall when the functional component is housed in the housing, is preferably smaller than the inclination angle of the side wall relative to the bottom, measured on the outer wall side of the side wall when the functional component is not housed in the housing, and the difference in angle is preferably in the range of 5° to 15°. This makes it possible to prevent excessive deformation of the housing when the functional component is housed in the housing while ensuring a binding force sufficient to bind the functional component. In particular, when the difference in the inclination angle between before and after housing the functional component is in the range of 5° to 15°, an excellent balance is achieved between the binding force of the housing to the functional component and the degree of deformation that does not cause damage to the housing. As a result, it is possible to prevent the functional component from falling out during travel while also preventing damage to the housing.

[0015] The opening width accommodates Department Narrower than the minimum width of Department The circumference of the upper part of 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.

[0016] 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]

[0017] [Figure 1](A) to (D) illustrate embodiments of a housing with functional components according to the present invention, where (A) is a perspective view showing the interior of the housing with a portion of the side wall cut away when no functional components are housed in the housing, (B) is a cross-sectional view of the entire housing of (A), (C) is a perspective view showing an enlarged view of the inner wall surface of the side wall of the housing of (A), and (D) is a cross-sectional view of the entire housing with functional components housed in it. [Figure 2] 10(A) to 10(E) are perspective views illustrating other embodiments of the uneven area formed on the inner wall surface of the side wall portion of the container. [Figure 3] FIG. 1A is a perspective view illustrating the dimensions of the concave-convex region, and FIG. 1B is a cross-sectional view illustrating the dimensions of the concave-convex region. [Figure 4] FIG. 10 is a cross-sectional view illustrating another embodiment of a container with functional components according to the present invention. [Figure 5] FIG. 10 is a cross-sectional view illustrating another embodiment of a container with functional components according to the present invention. [Figure 6] (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 7] 10A and 10B are half cross-sectional views of a housing with functional parts for explaining the dimensions of the housing. [Figure 8] 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 9] 9 is an enlarged cross-sectional view of the functional component-equipped container of FIG. 8. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] 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 contains the functional part 20. The container with functional parts 1 in Figures 1(A) to 1(C) shows a state in which the functional part 20 is not contained in the container 10, while the container with functional parts 1 in Figure 1(D) shows a state in which the functional part 20 is contained in the container 10.

[0019] The container 10 has a flat bottom 11 fixed to the inner surface of the tire, a cylindrical side wall 12 protruding from the bottom 11, a container section 13 formed by the bottom 11 and the side wall 12, and an opening 14 communicating with the container section 13.

[0020] The bottom 11 is the longest (has the largest diameter) of all the components of the housing 10. The sidewalls 12 are formed so as to slope inward from a direction perpendicular to the bottom 11. Therefore, the housing section 13 formed by the bottom 11 and the sidewalls 12 has a substantially trapezoidal cross-sectional shape. That is, the cross-sectional width of the housing section 13 gradually decreases toward the upper portion and is narrowest at the maximum height. The sidewalls 12 have 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 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 section 13 (the width at a position adjacent to the opening 14).

[0021] 1, the bottom 11, side wall 12, and opening 14 all have a circular planar shape, and the storage section 13 has a truncated cone shape. The planar shapes of the bottom 11, side wall 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 section 13 is also not particularly limited.

[0022] In this container 10, an uneven region 15 having a finely uneven surface is formed on at least a portion of the inner wall surface 12x of the side wall portion 12. This uneven region 15 is composed of a plurality of convex portions 15a and / or concave portions 15b, and can be formed by regularly arranging these. For example, in FIG. 1(C), the convex portions 15a and concave portions 15b are alternately arranged so that adjacent convex portions 15a do not share sides with each other, thereby forming the uneven region 15. The uneven region 15 may be uniformly provided with the same shape and density over the entire inner wall surface 12x of the side wall portion 12, or may be provided with partially varying shapes and densities of the convex portions.

[0023] Furthermore, the shape of the uneven region 15 is not particularly limited, and any shape can be adopted. For example, examples of the uneven region 15 include cylindrical recesses 15b as shown in Fig. 2(A), square pillar recesses 15b as shown in Fig. 2(B), linear protrusions 15a with a portion bent as shown in Fig. 2(C), square pyramidal protrusions 15a as shown in Fig. 2(D), and protrusions 15a with a gradually decreasing diameter toward the tip and a curved tip as shown in Fig. 2(E).

[0024] 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.

[0025] 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.

[0026] In the present invention, the uneven region 15 consisting of the convex portions 15a and / or concave portions 15b and the housing 21 of the functional component 20 do not fit together, and there are no grooves, convex portions, or concave portions on the bottom surface of the housing 21, and there are no grooves, convex portions, or concave portions on the side surfaces of the housing 21 that fit together with the uneven region 15.

[0027] The above-mentioned container with functional part comprises a functional part 20 for acquiring tire information and a container 10 for accommodating the functional part 20, the container 10 having a bottom 11 fixed to the inner surface of the tire, a side wall 12 protruding from the bottom 11, a container section 13 formed by the bottom 11 and the side wall 12, and an opening 14 communicating with the container section 13, and at least a portion of the inner wall surface 12x of the side wall 12 has an uneven region 15 consisting of a plurality of convex portions 15a and / or concave portions 15b. Therefore, when the functional part 20 is accommodated in the container 10, the contact area between the surface of the functional part 20 and the inner wall surface 12x of the side wall 12 of the container 10 is reduced compared to when the uneven region 15 is not present, thereby reducing the frictional force at the contact surface between the surface of the functional part 20 and the side wall 12 of the container 10 and allowing the frictional force to be adjusted appropriately. This makes it possible to prevent the functional part 20 from falling off or moving excessively while ensuring sufficient holding force for the functional part 20, and also makes it easy to store the functional part 20 in the container 10, while preventing excessive load from being applied to the container 10 when the functional part 20 is stored, thereby avoiding deterioration in the durability of the container 10.

[0028] In the above-described housing with functional parts, the convex portions 15a and / or concave portions 15b constituting the concave-convex region 15 are preferably made of vulcanized rubber having a modulus at 100% elongation of 1.0 MPa or more but less than 12.0 MPa. Having such physical properties for the convex portions 15a and the concave portions 15b allows both durability of the housing 10 and ease of housing the functional parts 20 in the housing 10 to be achieved. Furthermore, the concave-convex region 15 can be made of the same material as the housing 10. For example, the concave-convex region 15 may be molded integrally with the housing 10 using a mold for the housing 10 using a rubber having a different hardness from that of the housing 10, or the concave-convex region 15 molded separately from the housing 10 may be bonded to the inner wall surface 12x of the side wall portion 12 of the housing 10.

[0029] In the above-described functional component-equipped container, the dimensions and area of ​​the uneven region 15 may be set as follows. As shown in FIGS. 3A and 3B, the maximum height Rz is the height from the deepest recess 15bm to the highest protrusion 15am in the uneven region 15. This maximum height Rz is one of the JIS roughness indices and is measured in accordance with JIS-B0601. The maximum height Rz of the uneven region 15 is preferably 10 μm to 2000 μm, and more preferably 100 μm to 2000 μm. Here, when multiple recesses 15b are formed on the inner wall surface 12x of the side wall portion 12 (see, for example, FIG. 2A), the inner wall surface 12x is regarded as the highest protrusion 15am, and the maximum height Rz is measured in the same manner as above.

[0030] By appropriately setting the maximum height Rz of the concave-convex region 15 in this manner, the holding force of the functional component 20 can be increased, effectively preventing the functional component 20 from falling off or excessive movement. This also facilitates the process of housing the functional component 20 in the container 10, while preventing excessive load from being applied to the container 10 when housing the functional component 20, thereby avoiding a deterioration in the durability of the container 10. Here, if the maximum height Rz of the concave-convex region 15 is less than 10 μm, the height of the protrusions 15 a is insufficient, making it difficult to appropriately adjust the frictional force. Conversely, if the maximum height Rz of the concave-convex region 15 is greater than 2000 μm, the protrusions 15 a are easily damaged when housing the functional component 20, reducing durability, and the frictional force becomes too high, making it difficult to house the functional component 20.

[0031] In addition, in the uneven region 15, as shown in FIG. 3A, a plane having a height of 1 / 2 the maximum height Rz (0.5 × Rz) and parallel to the inner wall surface 12x of the side wall portion 12 is defined as a reference plane S. That is, the reference plane S is a plane having a height of 1 / 2 the maximum height Rz from the recessed portion 15bm, which has the greatest depth in the uneven region 15. In this case, it is preferable that the total cross-sectional area A, which is the sum of the cross-sectional areas of the protrusions 15a on the reference plane S, and the area As of the reference plane S satisfy the relationship 0.2≦A / As≦0.8. Here, the cross-sectional area of ​​one protrusion 15a on the reference plane S is the area of ​​the shaded portion shown in FIG. 3A, and the reference plane S can be set arbitrarily. Furthermore, when a plurality of recesses 15b are formed on the inner wall surface 12x of the side wall portion 12 (see, for example, FIG. 2(A)), the inner wall surface 12x is regarded as the protrusion 15am with the greatest height, and the total cross-sectional area A is the area calculated based on the reference plane S having a height that is half the maximum height Rz, as described above. Note that, as shown in FIGS. 3(A) and 3(B), in the uneven region 15, the heights and depths of the protrusions 15a and recesses 15b do not all need to be the same, and the overall shapes and cross-sectional shapes of the protrusions 15a and recesses 15b on the reference plane S may be different from each other.

[0032] By appropriately setting the ratio of the total cross-sectional area A to the area As in this way, it is possible to ensure an appropriate frictional force between the surface of the functional component 20 and the contact surface of the side wall 12 of the container 10. Here, if the ratio of the total cross-sectional area A to the area As is less than 0.2, the number of convex portions 15a in the uneven region 15 will be too few, making it impossible to ensure a sufficient frictional force. Conversely, if the ratio of the total cross-sectional area A to the area As is greater than 0.8, the number of convex portions 15a in the uneven region 15 will be too many, resulting in an excessively high frictional force.

[0033] Fig. 4 shows another embodiment of a housing with functional components of the present invention. In Fig. 4, at least a portion of the uneven region 15 is formed in the lower half of the inner wall surface 12x of the side wall portion 12. This lower half of the inner wall surface 12x is a range up to a height of 1 / 2 (0.5 × hb) of the height hb of the housing portion 13. In Fig. 4, the uneven region 15 is formed continuously from the lower end of the side wall portion 12, and the height h of the upper end of the uneven region 15 is greater than 1 / 2 of the height hb of the housing portion 13, but this is not limited to this. Alternatively, the uneven region 15 may be formed continuously from the lower end of the side wall 12, with the height h of the upper end of the uneven region 15 being equal to or less than half the height hb of the housing section 13. Alternatively, the uneven region 15 may be formed locally only in the center of the inner wall surface 12x so that the upper and lower ends of the uneven region 15 include half the height hb of the housing section 13. Alternatively, the uneven region 15 may be formed in a portion of the inner wall surface 12x so that the upper and lower ends of the uneven region 15 are included in the lower half of the inner wall surface 12x. When the functional component 20 is inserted into the housing 10, the opening 14 is widened and the functional component 20 is inserted. At this time, the portion of the housing 10 that comes into contact with the functional component 20 is mainly the lower half of the inner wall surface 12x of the side wall 12. Therefore, forming the uneven region 15 in the lower half of the inner wall surface 12x of the side wall 12 is beneficial for achieving the effects of the present invention. The height hb of the housing portion 13 is measured when the housing body 10 does not house any functional component 20 .

[0034] Forming the uneven region 15 in this manner makes it easier to accommodate the functional components 20 in the housing 10, effectively improving the work of accommodating the functional components 20. In particular, when no uneven region is provided on the upper half of the inner wall surface 12x of the side wall portion 12, the holding force of the functional components 20 can be ensured by the lower half of the inner wall surface 12x of the side wall portion 12 on which the uneven region 15 is provided, and movement of the functional components 20 within the housing 10 can be suppressed, thereby reducing heat generation.

[0035] Furthermore, the area A1 of the uneven region 15 and the area A0 of the lower half of the inner wall surface 12x of the sidewall portion 12 preferably satisfy the relationship 0.5≦A1 / A0≦1.0. Here, the area A1 of the uneven region 15 refers to the area occupied by the portion of the lower half of the inner wall surface 12x of the sidewall portion 12 where the uneven region 15 is disposed, and does not take into account the surface area of ​​the convex portions 15a and concave portions 15b. Furthermore, if the uneven region 15 is disposed in multiple locations on the inner wall surface 12x, the area A1 of the uneven region 15 is the sum of the areas of the respective locations. Note that if the uneven region 15 is formed beyond the lower half of the inner wall surface 12x of the sidewall portion 12, the portion of the uneven region 15 beyond the lower half of the inner wall surface 12x is not considered in the area A1 of the uneven region 15.

[0036] By appropriately setting the ratio of area A1 to area A0 in this way, it is possible to ensure an appropriate frictional force between the surface of functional component 20 and the contact surface between side wall 12 of container 10. If the ratio of area A1 to area A0 is less than 0.5, the lower half of inner wall surface 12x of side wall 12 cannot sufficiently secure the holding force of functional component 20.

[0037] Fig. 5 shows another embodiment of a housing with a functional part of the present invention. In Fig. 5, a connecting portion 15x is formed in at least a part of the uneven region 15, continuing from the lower half of the inner wall surface 12x of the side wall portion 12 to the upper end of the housing portion 13. This connecting portion 15x functions as a passage for air remaining when the functional part 20 is housed.

[0038] Here, when the functional component 20 is accommodated in the housing body 10, the functional component 20 and the side wall portion 12 of the housing body 10 come into close contact with each other, which can cause air to remain between the housing body 10 and the functional component 20 (for example, between the functional component 20 and the bottom portion 11), making it impossible to insert the functional component 20 into an appropriate position. In response to this, by forming the connecting portion 15x in part of the uneven region 15 as described above, the connecting portion 15x functions as an air passage and can release the remaining air, allowing the functional component 20 to be inserted into an appropriate position. This improves the work of accommodating the functional component 20.

[0039] 6(A) to 6(D) show an embodiment of a container with functional components before and after the functional components are accommodated. The container 1 with functional components in Fig. 6(A) and (B) shows a state in which no functional components 20 are accommodated in the container 10, while the container 1 with functional components in Fig. 6(C) and (D) shows a state in which the functional components 20 are accommodated in the container 10.

[0040] 6(A) to 6(D), in the functional-component-equipped container 1, the inclination angle θ2 of the side wall 12 with respect to the bottom 11 when the functional component 20 is accommodated in the accommodation section 13 is configured to be smaller than the inclination angle θ1 of the side wall 12 with respect to the bottom 11 when the functional component 20 is not accommodated in the accommodation section 13. These inclination angles θ1 and θ2 are both angles measured on the outer wall side of the side wall 12. When the functional component 20 is inserted into the accommodation section 13 through the opening 14, the side wall 12 tilts outward, deforming so that the width of the opening 14 expands, thereby reducing the inclination angle θ of the side wall 12 with respect to the bottom 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 preferably configured to be in the range of 5° to 15°.

[0041] Here, when measuring the inclination angle θ (θ1, θ2) of the side wall 12, the angle can be calculated using a CT scan or the like. Furthermore, only when measuring the inclination angle θ of the side wall 12, as shown in FIG. 7(A), a line L1 passing through two points on the outer surface of the side wall 12, namely, positions 1 / 2 (0.5×H) and 1 / 4 (0.25×H) of the total height H of the container 10, is regarded as the side wall 12, and the inclination angle θ1 before and the inclination angle θ2 after the container 10 is accommodated are measured. The total height H (maximum height H) of the container 10 changes before and after the container 10 accommodates the functional component 20, and the inclination angle θ (θ1, θ2) of the side wall 12 is measured based on these heights. Furthermore, if a protrusion is formed on the outer surface of the side wall 12 at a position that is 1 / 2 and / or 1 / 4 of the total height H of the housing 10, the inclination angle θ of the side wall 12 is measured based on a straight line that does not include the protrusion and that is defined using the lower end of the protrusion as a new reference point. The total height H of the housing 10 is the height from the lower surface of the bottom 11 to the upper surface of the locking portion 12e.

[0042] In such a functional-component-equipped container 1, the inclination angle θ2 of the side wall 12 relative to the bottom 11 measured on the outer wall side of the side wall 12 when the functional component 20 is accommodated in the container section 13 is smaller than the inclination angle θ1 of the side wall 12 relative to the bottom 11 measured on the outer wall side of the side wall 12 when the functional component 20 is not accommodated in the container section 13. This allows the container 10 to prevent excessive deformation while maintaining a sufficient restraining force for restraining the functional component 20. In particular, when the difference in the inclination angles (θ1 - θ2) before and after accommodating the functional component 20 is in the range of 5° to 15°, a good balance is achieved between the restraining force of the container 10 on the functional component 20 and the degree of deformation that does not cause damage to the container 10. This prevents the functional component 20 from falling off during travel while also preventing damage to the container 10.

[0043] 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.

[0044] In particular, when the functional component 20 is housed in the housing portion 13, the inclination angle θ2 of the side wall 12 relative to the bottom 11 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 component 20 is housed in this manner, stress concentration at the base of the side wall 12 of the housing body 10 can be alleviated, thereby improving the durability of the housing body 10. Furthermore, the opening 14 of the housing body 10 does not become excessively narrow, which is also suitable for removing the functional component 20.

[0045] If the inclination angle θ2 after the functional component 20 is accommodated is less than 90°, stress concentration at the base of the side wall 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 side wall 12. On the other hand, if the inclination angle θ2 after the functional component 20 is accommodated is greater than 115°, the side wall 12 will still be 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.

[0046] The width of the opening 14 is narrower than the minimum width of the storage section 13, and the perimeter D2 of the upper part of the storage section 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 storage portion 13 u The perimeter of the functional part 20 is D1 u The purpose of this is to increase the restraining force of the container 10 by setting the perimeter D2 of the container 13 to be smaller than the perimeter D2 of the container 13 within a specific range. u7(B), before the functional component 20 is accommodated, the perimeter D1 of the accommodation portion 13 is measured at three positions: a position at this height h1 and a position equivalent to ±25% (0.25×h1) of the height h1, and the perimeter D1 of the accommodation portion 13 is averaged. 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.

[0047] In this way, the perimeter D2 of the storage section 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.

[0048] Here, the ratio D2 u / D1 u If the ratio D2 is less than 0.60, the restraining force of the housing body 10 increases, but the degree of deformation of the side wall portion 12 also increases, so that cracks may occur in the housing body 10 during long-distance driving, increasing the possibility of the housing body 10 being damaged. u / D1 u If 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.

[0049] 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.

[0050] 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.

[0051] Fig. 8 shows a pneumatic tire in which a container with functional components is fixed to the inner surface of the tire. As shown in Fig. 8, 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.

[0052] 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.

[0053] 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.

[0054] The above-described tire internal structure is a typical example of a pneumatic tire, but is not limited to this.

[0055] In the above-mentioned pneumatic tire, the container 1 with functional parts can be attached to any part of the tire inner surface Ts, but 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, because it is less likely to deform during driving and is less likely to come off due to the application of centrifugal force.

[0056] 9, 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 side wall 12 and a straight line L2 passing through the other end 12b of each side wall 12 on both sides in a cross-sectional view is measured. Also, for example, even if there is no member equivalent to the bottom and the container with functional parts has side walls directly fixed to the tire inner surface, the measurement can be performed in a similar manner to the above.

[0057] 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]

[0058] Tires of the conventional example and examples 1 to 7 were manufactured with a tire size of 225 / 45R18, and were equipped with a functional component for acquiring tire information and a container that accommodated the functional component, the container having a bottom that was fixed to the inner surface of the tire, sidewalls that protruded from the bottom, a container formed by the bottom and the sidewalls, and an opening that communicated with the container, and the container with the functional component accommodated in the container was fixed to the inner surface of the tire, and the presence or absence of an uneven region and the characteristics of the uneven region (maximum height Rz of the unevenness, density of the unevenness (A / As), top end height position (h / hb), occupied area, presence or absence of connecting portions, and M100 of the unevenness) were set as shown in Table 1.

[0059] In Table 1, "top height position" is the ratio (h / hb) of the height h of the top of the uneven region to the height hb of the storage section, and a value of "1.0" means that the uneven region is arranged from the bottom to the top of the side wall, while any other value means that the uneven region is arranged continuously from the bottom to the set height of the side wall. Also, "Uneven M100" means the modulus [MPa] at 100% elongation, and is measured by a tensile test at 23°C in accordance with JIS K6251 (using a No. 3 dumbbell), and indicates the tensile stress at 100% elongation.

[0060] These test tires were evaluated for storage workability, crack resistance and high-speed durability by the following test methods, and the results are shown in Table 1.

[0061] Storage Ease: For each test tire, the time required to install the functional parts in the housing was measured. The evaluation results were expressed as an index using the reciprocal of the measured value, with the measured value for the conventional example being set at 100. The larger the index value, the shorter the work time and the better the installation workability.

[0062] Crack Resistance: Each test tire was mounted on a wheel with a rim size of 18 x 7.5JJ, and after aging in an oxygen atmosphere at 80°C for 5 days, a running test was conducted using a drum testing machine under conditions of a load 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, and the tire was run until cracks were observed on the surface of the tire housing, and the running distance at the time of crack appearance was measured. The evaluation results were expressed as an index, with the conventional example being set at 100. A higher index value indicates better crack resistance.

[0063] Fast durability: Each test tire was mounted on a wheel with a rim size of 18 x 7 1 / 2JJ, and a running test was conducted on 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 speed at which an abnormality occurred in the data sent from the functional parts was measured. The evaluation results were expressed as an index, with the measurement value of the conventional example being 100. The higher the index value, the better the high-speed durability.

[0064] [Table 1]

[0065] As can be seen from Table 1, the pneumatic tires of Examples 1 to 7 had improved ease of installation, crack resistance, and high-speed durability compared to the conventional tire. In the pneumatic tires of Examples 1 to 7, the functional components could be inserted into appropriate positions when installed, which led to improved crack resistance and high-speed durability, and therefore prevented deterioration of the durability of the installed body.

[0066] The present disclosure includes the following inventions [1] to

[10] . Invention [1] is a container with functional parts, which comprises a functional part for acquiring tire information and a container that houses the functional part, wherein the container has a bottom that is fixed to the inner surface of the tire, a side wall that protrudes from the bottom, a container section formed by the bottom and the side wall, and an opening that communicates with the container section, and at least a portion of the inner wall surface of the side wall has an uneven area consisting of a plurality of convex and / or concave portions. Invention [2] is a container with functional parts according to invention [1], characterized in that the maximum height Rz from the recess with the greatest depth to the protrusion with the greatest height in the uneven area is 10 μm to 2000 μm. Invention [3] is a container with functional parts according to invention [1] or [2], characterized in that when a plane parallel to the inner wall surface of the side wall portion having a height that is 1 / 2 of the maximum height Rz from the recess with the greatest depth in the uneven area to the protrusion with the greatest height in the uneven area is taken as a reference plane S, the total cross-sectional area A, which is the sum of the cross-sectional areas of the protrusions on the reference plane S, and the area As of the reference plane S satisfy the relationship 0.2≦A / As≦0.8. Invention [4] is a container with functional parts described in any one of inventions [1] to [3], characterized in that at least a portion of the uneven area is formed in a range of height less than 1 / 2 of the height hb of the container section on the inner wall surface of the side wall section. Invention [5] is a container with functional parts according to any one of inventions [1] to [4], characterized in that the area A1 of the uneven region and the area A0 of the lower half of the inner wall surface of the side wall portion satisfy the relationship 0.5≦A1 / A0≦1.0. Invention [6] is a container with functional parts according to any one of inventions [1] to [5], characterized in that at least a portion of the uneven area is formed continuously from the lower half of the inner wall surface of the side wall portion to the upper end of the container portion. Invention [7] is a container with functional parts according to any one of inventions [1] to [6], characterized in that the convex portions and / or concave portions constituting the uneven area are made of vulcanized rubber having a modulus at 100% elongation of 1.0 MPa or more and less than 12.0 MPa. Invention [8] is a container with functional parts according to any one of inventions [1] to [7], characterized in that the inclination angle of the side wall part relative to the bottom measured on the outer wall side of the side wall part when the functional part is housed in the container is smaller than the inclination angle of the side wall part relative to the bottom measured on the outer wall side of the side wall part when the functional part is not housed in the container, and the angle difference is in the range of 5° to 15°. The invention [9] is such that the width of the opening is narrower than the minimum width of the storage section, and the perimeter D2 of the upper part of the storage section u and the perimeter D1 of the upper part of the functional component u and 0.60≦D2 u / D1 u The functional part-equipped container according to any one of inventions [1] to [8] is characterized in that it satisfies the relationship of ≦0.95. Invention

[10] is a tire in which the functional part-equipped container according to any one of inventions [1] to [9] is fixed to the tire inner surface, and the functional part is housed in the container. [Explanation of symbols]

[0067] 1. Housing with functional parts 10 Containment Unit 11 Bottom 12 Side wall 13 Storage section 14 Openings 15 Uneven area 15a Convex part 15b Recess 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 side wall portion protruding from the bottom portion, a storage portion formed by the bottom portion and the side wall portion, and an opening portion communicating with the storage portion, A container with functional parts characterized by having an uneven area consisting of a plurality of convex and / or concave portions on at least a portion of the inner wall surface of the side wall portion (excluding containers with functional parts in which the uneven area consisting of the convex and / or concave portions and the housing of the functional part fit together).

2. 2. The container with functional parts according to claim 1, wherein a maximum height Rz from a recessed portion having a maximum depth to a protruding portion having a maximum height in the uneven region is 10 μm to 2000 μm.

3. A container with functional parts as described in claim 1, characterized in that when a plane parallel to the inner wall surface of the side wall portion having a height that is 1 / 2 of the maximum height Rz from the recess with the greatest depth to the protrusion with the greatest height in the uneven area is defined as a reference plane S, a total cross-sectional area A, which is the sum of the cross-sectional areas of the protrusions on the reference plane S, and an area As of the reference plane S satisfy the relationship 0.2≦A / As≦0.

8.

4. 2. The container with functional parts according to claim 1, wherein at least a portion of the uneven area is formed in a range of height equal to or less than half the height hb of the container section on the inner wall surface of the side wall section.

5. 2. The container with functional parts according to claim 1, wherein an area A1 of the uneven region and an area A0 of the lower half of the inner wall surface of the side wall portion satisfy the relationship 0.5≦A1 / A0≦1.

0.

6. 2. The container with functional parts according to claim 1, wherein at least a part of the uneven area is formed continuously from a lower half of the inner wall surface of the side wall portion to an upper end of the container portion.

7. 2. The container with functional parts according to claim 1, wherein the convex portions and / or concave portions constituting the uneven region are made of vulcanized rubber having a modulus at 100% elongation of 1.0 MPa or more and less than 12.0 MPa.

8. The container with functional parts according to claim 1, characterized in that the angle of inclination of the side wall portion relative to the bottom measured on the outer wall side of the side wall portion when the functional part is housed in the container is smaller than the angle of inclination of the side wall portion relative to the bottom measured on the outer wall side of the side wall portion when the functional part is not housed in the container, and the angle difference is in the range of 5° to 15°.

9. The width of the opening is narrower than the minimum width of the storage portion, and the perimeter of the upper part of the storage portion is D2 u and the perimeter D1 of the upper part of the functional component u and 0.60≦D2 u / D1 u 2. The container with functional parts according to claim 1, wherein the relationship of ≦0.95 is satisfied.

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.

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