阅读说明：本技术 轮胎 (Tyre for vehicle wheels ) 是由 石原大雅 渡边润 山口卓 加藤庆一 向川友德 牛头诚 满田翔 于 2019-11-25 设计创作，主要内容包括：本公开的轮胎在轮胎的内表面上包括消音器,其中部分或全部消音器是橙色的。(The tire of the present disclosure includes a noise damper on the inner surface of the tire, wherein some or all of the noise damper is orange.)

1. A tire, comprising:

a noise damper located on an inner surface of the tire,

wherein part or all of the silencer is orange.

2. A tyre according to claim 1, characterized in that the wavelength of the visible light emitted by part or all of said noise damper is between 590nm and 620 nm.

3. The tire according to claim 1 or 2, wherein said noise damper is a porous body.

4. A tyre according to claim 3, characterized in that said porous body is a sponge material.

Technical Field

The present disclosure relates to a tire.

Background

In order to reduce the resonance vibration (cavity resonance) of air and gas generated in the tire inner cavity, for example, a muffler formed of a porous body such as a sponge material or the like has been disposed on the inner surface of the tire (see patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2005-254924

Disclosure of Invention

Problems to be solved by the invention

However, in some cases, insects may be attracted to the noise damper, particularly during storage of the tire prior to mounting on the rim.

It would be helpful to provide a tire that can protect a noise damper from insects.

Means for solving the problems

The summary of the present disclosure is as follows.

The tire according to the present disclosure includes:

a noise damper located on an inner surface of the tire,

wherein part or all of the silencer is orange.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present disclosure, a tire capable of protecting a muffler from insects can be provided.

Drawings

In the drawings:

fig. 1 is a sectional view of a tire in a tire width direction according to an embodiment of the present disclosure.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a sectional view of a tire in a tire width direction according to an embodiment of the present disclosure. As shown in fig. 1, the tire 1 is a pneumatic tire and includes a carcass 3 extending annularly between a pair of bead portions 2. The tire 1 further includes, in order on the outer side in the tire radial direction of the crown portion of the carcass 3, a belt 4 formed of two belt layers 4a, 4b in the illustrated example, and a tread 5. The pneumatic tire can be filled not only with air but also with an inert gas such as nitrogen or argon.

In this example, a bead core 2a is embedded in each of a pair of bead portions 2. In the present disclosure, the sectional shape and material of the bead core 2a are not particularly limited, and a configuration commonly used for tires can be adopted. The tire 1 in the illustrated example has a bead filler 2b of a triangular sectional shape on the tire radial direction outer side of the bead core 2 a. The sectional shape of the bead filler 2b is not limited to the present example, and the material is not particularly limited. Alternatively, the tire can be made lighter by being constructed without the bead filler 2 b.

In the example shown in fig. 1, the carcass 3 is formed of one carcass ply arranged in the radial direction (the carcass cords form an angle of 85 ° or more, preferably 90 ° with respect to the tire circumferential direction). On the other hand, in the present disclosure, the number of carcass plies is not particularly limited and can be two or more. In this example, the carcass 3 has a carcass body 3a extending annularly between the pair of bead portions 2 and a carcass folded-back portion 3b extending from the carcass body 3a and folded back around the bead core 2 a. On the other hand, in the present disclosure, the carcass folded-back portion 3b can be wrapped around the bead core 2a, or can be configured to be sandwiched between a plurality of divided small bead cores. In the present example, the turn-up end 3c of the turn-up portion 3b of the carcass 3 is located on the tire radial direction outside of the bead filler 2b and on the tire radial direction inside of the tire maximum width position (tire radial direction position where the width is maximum in the tire width direction), but the position of the turn-up end 3c is not limited to the present example and can be appropriately set. In the present disclosure, the carcass 3 can also be a bias carcass.

In the example shown in fig. 1, the tire 1 includes a belt 4 formed of two belt layers 4a, 4 b. In the present example, the belt layers 4a, 4b are inclined belt layers formed of belt cords inclined with respect to the tire circumferential direction and crossing each other between the layers. In the present disclosure, the number of belt layers is not particularly limited. The inclination angle of the belt cords in the belt layer is not particularly limited, but can be, for example, 35 ° to 85 ° with respect to the tire circumferential direction. One or more reinforcing belt layers can be disposed outside and/or inside the inclined belt layer in the tire radial direction. The reinforcing cords of the reinforcing belt layer are not particularly limited, but can extend at an angle of 0 ° to 5 ° in the tire circumferential direction, for example. The width of each belt layer and each reinforcing belt layer in the tire width direction is not particularly limited. The material of the belt cord and the reinforcing cord can use an appropriate known material, and the number of cords and the like can also be set as needed.

In the illustrated example, the tire 1 has a tread 5 formed of one layer of tread rubber. On the other hand, in the present disclosure, the tread rubber constituting the tread 5 may be formed of a plurality of different rubber layers. In this case, the different rubber layers can be stacked in the tire radial direction and/or arranged side by side in the tire width direction.

As shown in fig. 1, the tire 1 of the present embodiment includes a muffler 7 on an inner surface 6 of the tire 1 (in the present example, more specifically, an inner surface of a tread portion including a tread 5). In the present embodiment, the muffler 7 is a porous body (a sponge material in the present example). In the present example, the muffler 7 is rectangular in a cross-sectional view in the tire width direction, but the shape of the muffler 7 is not particularly limited. The size and the like of the muffler 7 are also not particularly limited, but the volume of the muffler 7 is preferably 0.1% to 80% of the total volume of the inner cavity of the tire 1. The reason for this is that the noise deadening performance can be improved by setting the volume of the noise damper 7 to 0.1% or more of the total volume of the inner cavity of the tire 1, and the weight increase due to the noise damper 7 can be suppressed by setting the volume of the noise damper 7 to 80% or less of the total volume of the inner cavity of the tire 1. The "volume" referred to herein is a volume at normal temperature and normal pressure in the case where the tire 1 is removed from the rim. The "total volume of the inner cavity of the tire" means the total volume when the tire 1 is mounted on an applicable rim and filled to a predetermined internal pressure.

Here, the "applicable rim" refers to a standard rim (such as a measuring rim in a standard manual of the ETRTO in europe or a design rim in the TRA yearbook in the usa) of an applicable size described in or to be described in the future in an industrial standard (for example, the yearbook published by JATMA (japan automobile tire manufacturer association) in japan, a standard manual of the ETRTO in europe (european tire and rim technical organization), the yearbook of the TRA (tire and rim association) in the usa, and the like) effective in an area where the tire is manufactured and used. (in other words, "rim" includes not only existing dimensions but also dimensions that may be included in industry standards in the future. an example of "dimensions to be described in the future" is dimensions described under "future developments" in the 2013 edition of the ETRTO standards manual). In the case of dimensions not described in the above-mentioned industrial standards, "rim" means a rim having a width corresponding to the bead width of the tire.

The "predetermined internal pressure" refers to the air pressure (maximum air pressure) described in JATMA and the like and corresponding to the maximum load capacity of a single wheel in the applicable size/ply class. In the case of a size not described in the industrial standard, "predetermined internal pressure" refers to an air pressure (maximum air pressure) corresponding to a maximum load capacity predetermined for each vehicle on which a tire is mounted.

Here, in the present example, the muffler 7 extends continuously in the tire circumferential direction, but the muffler 7 can also be formed discontinuously. Further, in the present example, the muffler 7 is disposed on the inner surface of the tread portion, but the muffler 7 may be disposed in various other manners, for example, on the inner surface of the sidewall portion.

The material forming the muffler 7 can be any material that can be controlled to reduce the cavity resonance energy by, for example, mitigating, absorbing, or converting the cavity resonance energy into another form of energy (such as thermal energy), and is not limited to the above-described porous body. It is also possible to use, for example, nonwoven fabrics made of organic or inorganic fibers.

When the muffler 7 is a sponge material, as in the present embodiment, the sponge material can be a sponge-like porous structure including, for example, a sponge with open cells (bubbles) made of foamed rubber or synthetic resin. Examples of the sponge material include, in addition to the above-described sponge, a net-like material in which animal fibers, plant fibers, synthetic fibers, and the like are interwoven and integrally connected. The above-mentioned "porous structure" is not limited to a structure having continuous bubbles, but includes a structure having discontinuous bubbles. The above-described sponge material converts the vibration energy of the air vibrating in the voids formed on the surface and inside of the sponge material into heat energy. This suppresses cavity resonance in the tire inner cavity, thereby reducing road noise.

Examples of the sponge material include synthetic resin sponges such as ether polyurethane sponge, ester polyurethane sponge, and polyethylene sponge, and rubber sponges such as chloroprene rubber sponge (CR sponge), ethylene propylene diene monomer sponge (EPDM sponge), nitrile rubber sponge (NBR sponge). From the viewpoints of noise reduction, weight reduction, adjustability of foaming, durability, and the like, it is preferable to use a sponge such as a polyurethane sponge including an ether-based polyurethane sponge or a polyethylene sponge.

In the case where the muffler 7 is a sponge material, the hardness of the sponge material is not limited as in the present embodiment, but is preferably in the range of 5N to 450N. The sound deadening property can be improved by setting the hardness to 5N or more, and the adhesiveness of the muffler can be increased by setting the hardness to 450N or less. For the same reason, the hardness of the muffler is more preferably in the range of 8N to 300N. Here, "hardness" is defined as a value measured according to method a in section 6.3 of the measurement method in chapter 6 of JIS K6400.

The specific gravity of the sponge material is preferably between 0.001 and 0.090. The reason for this is that the sound deadening property can be improved by setting the specific gravity of the sponge material to 0.001 or more, and the increase in weight due to the sponge material can be suppressed by setting the specific gravity of the sponge material to 0.090 or less. For the same reason, the specific gravity of the sponge material is more preferably between 0.003 and 0.080. Here, the "specific gravity" is a value obtained by converting an apparent density into a specific gravity according to the measurement method in chapter 5 of JIS K6400.

The tensile strength of the sponge material is preferably between 20kPa and 500 kPa. This is because the adhesiveness can be improved by setting the tensile strength of the sponge to 20kPa or more, and the productivity of the sponge can be improved by setting the tensile strength of the sponge to 500kPa or less. For the same reason, the tensile strength of the sponge material is more preferably between 40kPa and 400 kPa. Here, "tensile strength" is defined as a value measured with a No. 1 dumbbell test piece according to the measurement method in chapter 10 of JIS K6400.

The elongation at break of the sponge material is preferably between 110% and 800%. The reason for this is that the formation of cracks in the sponge can be prevented by setting the elongation at break to 110% or more, and the productivity of the sponge can be improved by setting the elongation at break to 800% or less. For the same reason, the elongation at break of the sponge material is more preferably between 130% and 750%. Here, "elongation at break" is defined as a value measured with a No. 1 dumbbell test piece according to the measurement method in chapter 10 of JIS K6400.

The tear strength of the sponge material is preferably between 1N/cm and 130N/cm. The reason for this is that cracks can be prevented from being formed in the sponge by setting the tear strength to 1N/cm or more, and the manufacturability of the sponge can be improved by setting the tear strength to 130N/cm or less. For the same reason, the tear strength of the sponge material is more preferably between 3N/cm and 115N/cm. Here, "tear strength" is defined as a value measured with test piece No. 1 according to the measurement method in chapter 11 of JIS K6400.

The foaming ratio of the sponge material should be between 1% and 40%. This is because the sound deadening property can be improved by setting the foaming ratio of the sponge to 1% or more, and the productivity of the sponge can be improved by setting the foaming ratio of the sponge to 40% or less. For the same reason, the foaming ratio of the sponge material is more preferably between 2% and 25%. Here, the "foaming ratio" means a value obtained by subtracting 1 from the ratio A/B of the specific gravity A of the solid phase portion of the sponge to the specific gravity B of the sponge and multiplying the result by 100.

The total mass of the sponge material is preferably between 5g and 800 g. The reason for this is that the sound deadening property can be improved by making the mass 5g or more, and the weight increase due to the sponge material can be suppressed by making the mass 800g or less. For the same reason, the mass of the sponge material is preferably between 20g and 600 g.

In the present embodiment, a part or all (in the present example, all) of the muffler 7 is orange. In this example, a part or all (in this example all) of the silencer 7 emits visible light at a wavelength between 590nm and 620 nm.

The muffler 7 can be made orange using various techniques, such as dyeing the muffler 7 orange.

The following describes the effects of the tire according to the present embodiment.

First, according to the tire 1 of the present embodiment, the noise damper 7 is disposed on the inner surface 6 of the tire 1, thereby reducing resonance vibration (cavity resonance) and improving noise damping performance.

The muffler 7, which is a porous body (e.g., sponge material) or the like, easily retains heat even during storage. Due to the holes and gaps, the silencer 7 is also prone to attract insects, which may be left inside. In contrast, in the tire 1 of the present embodiment, a part or all (in the present example, all) of the muffler 7 is orange (in the present example, the wavelength of visible light emitted from a part or all (in the present example, all) of the muffler 7 is between 590nm and 620 nm). Therefore, the silencer 7 absorbs light in the ultraviolet region, which is a wavelength region easily perceived by insects. This prevents insects from being attracted to the silencer 7, thereby protecting against insects.

As described above, the tire 1 of the present embodiment can protect the muffler 7 from insects.

In the present disclosure, the wavelength of visible light emitted from a part or all (in this example, all) of the silencer is preferably between 590nm and 620 nm. The reason for this is that when the wavelength is within this range, light having a wavelength in the ultraviolet region can be absorbed more reliably, and the above-described effect can be achieved more reliably.

In the present disclosure, the silencer is preferably a porous body. This enables the weight of the tire to be reduced while still achieving the above-described effects.

In the above case, the porous body is preferably a sponge material. This is because the sponge material is inexpensive and facilitates the manufacture of orange mufflers.

In the present disclosure, in the case where only a part of the muffler 7 is orange, the remaining part can be, for example, green. The reason for this is that the green color contains wavelengths at which insects evade. The insect-proofing effect of absorbing ultraviolet rays combined with the insect-proofing effect by adding the color that the insects dodge can effectively prevent the invasion of various insects. In this case, for example, the orange portion and the green portion can be arranged side by side in the tire width direction.

Description of the reference numerals

1 tire

2 bead part

2a bead core

2b bead filler

3 tyre body

3a carcass body

3b carcass turn-back portion

3c end of turn

4 belted

4a, 4b belt layer

5 Tread

6 inner surface of tyre

7 silencer