JP2013100033A - Pneumatic tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tire which satisfies user's taste for a tire having a large rim or flat side surface without increasing unsprung weight.SOLUTION: A pneumatic tire includes a pair of bead parts where a bead core is buried, a pair of sidewall parts which extend from the bead part to a radially outer side of the tire, and a tread part which extends across between the sidewall parts. The pneumatic tire further includes a printed annular outer decoration part which is disposed at a radially outer region of the tire of a side part which includes the bead part and the sidewall part, and a printed annular inner decoration part which is disposed at a radially inner side of the tire of the outer decoration part. To the inner decoration part, a decoration is applied to alternately repeat at least a first inner element and a second inner element in a circumferential direction of the tire. To the outer decoration part, a decoration is applied which is not continued to, and different from the decoration applied to the inner decoration part.

Description

  The present invention relates to a pneumatic tire in which an annular decorative portion is provided by printing on an outer surface of a side portion including a sidewall portion and a bead portion, and in particular, an applied rim is a large-diameter rim, The present invention proposes a technique for enhancing the added value by satisfying the preference of a user who prefers a tire having a flat side surface, and realizing sufficient differentiation in appearance from other tires.

  For the purpose of dressing up, etc., so-called inch-up is widely performed, in which the rim diameter of the wheel mounted on the car is changed to a larger one, and the side part is rounded as a user's preference for the tire There is a tendency to prefer a flat tire.

However, when a large-diameter tire is mounted on a large-diameter rim, there has been a problem that the ride comfort of the vehicle is deteriorated due to an increase in the unsprung weight due to an increase in the weight of the wheel.
Also, when manufacturing a tire with a flat side surface, it is necessary to increase the rubber gauge in the vicinity of the maximum width of the tire, and the same problem occurs due to an increase in unsprung weight due to an increase in the weight of the tire. It was.

  The present invention provides a tire that effectively solves such a conventional problem that has occurred when satisfying a user's preference for a tire equipped with a large-diameter rim or a tire having a flat side surface. It is the purpose.

  A pneumatic tire according to the present invention includes a pair of bead portions in which a bead core is embedded, a pair of sidewall portions extending outward from the bead portion in the radial direction of the tire, and a tread portion extending between both sidewall portions. An annular outer decorative portion made of printing and disposed on the inner side in the tire radial direction of the outer decorative portion, which is disposed on the outer side in the tire radial direction of the side portion including the bead portion and the sidewall portion. Provided with an annular inner decorative portion made of printing, and the inner decorative portion is subjected to at least a first inner element and a second inner element that are alternately repeated in the tire circumferential direction, The outer decoration portion is provided with a discontinuous and different decoration from the decoration applied to the inner decoration portion.

  Here, it is preferable that the brightness of the outer decorative portion is different from that of the inner decorative portion.

Further, when the width of the outer decorative portion in the tire radial direction is D _O , the width of the inner decorative portion in the tire radial direction is D _I, and the sum of D _O and D _I is D, D _O / D is A range of 0.3 to 0.6 is preferable.

  In such a pneumatic tire, it is preferable that a boundary between the outer decorative portion and the inner decorative portion is provided in the vicinity of the tire maximum width.

  In addition, it is desirable that the outer decorative portion has a maximum brightness difference in the tire circumferential direction and the radial direction within 5%.

  Moreover, in this pneumatic tire, it is preferable that the decoration of the inner decorative portion is alternately repeated 3 to 100 times in the tire circumferential direction by the first inner element and the second inner element.

  In such a pneumatic tire, it is preferable that the first inner element of the inner decorative portion is provided to be inclined in the tire circumferential direction with respect to the tire radial direction.

Further, the inner escutcheon, from its radially outer edge located radially inward tire, 3 mm or more 10mm or less, or, to a position spaced less than 50% of the tire radial width D _I of the inner escutcheon In the region, it is preferable that the brightness increases toward the inner side in the tire radial direction, and the maximum brightness difference is 30% or more.

In the above description, it is preferable that the second inner element of the inner decorative portion includes a color portion having a brightness range of 50% or more and a saturation range of 15% or more. It is more preferable to have a plurality of line portions that extend in the tire circumferential direction to form a decoration.
Further, the lightness and saturation of the color portion are 50 to 80% lightness, 50 to 100% saturation, or 75 to 100% lightness and 15 to 80% saturation, and the color It is preferable to make the hue of the portion substantially coincide with the hue of the vehicle on which the tire is mounted.

  Here, the outer decoration portion includes a decoration continuous in the tire circumferential direction with a saturation of 5% or less, or at least a width in the tire circumferential direction of the first inner element and the second inner element. It is preferable to apply decoration in which the first outer element and the second outer element, which are smaller than each other and have a saturation of 5% or less, are alternately repeated in the tire circumferential direction.

  Here, the brightness of the first outer element and the second outer element are both in the range of 10 to 90%, and the brightness difference between the first outer element and the second outer element is 50 to 80. %, And the first outer element and the second outer element are preferably alternately repeated 200 to 1500 times in the tire circumferential direction.

Incidentally, of the first inner element of the inner escutcheon, from the inner edge position of the tire radially inward, radially outward of the tire, up to 30% positions spaced in the tire radial width D _I of the inner escutcheon The brightness of at least a part of the region and the average brightness of the continuous decorations of the outer decoration part, or the higher of the average brightness of each of the first outer element and the second outer element of the outer decoration part The brightness difference is set to a range of 0 to 15%, and the brightness is 10 to 30% in at least one of the regions adjacent to the second inner element of the first inner element of the inner decorative portion. It is preferable to provide a region in the range.

In the present invention, brightness, saturation, and hue are defined in the HSV model.
Here, the lightness is an index representing the brightness of the color, and 100% is the brightest color in each hue, and 0% lightness is true black.
The saturation is an index indicating the purity of the color in a range of 0 to 100%. A color with high saturation is a pure color, and a color with low saturation is a dull color.
The hue is an index indicating where the color is in the spectrum in the range of 0 to 360 degrees, where 0 degree is red, and yellow, green, cyan, blue, magenta every 60 degrees.
By the way, the combination of brightness, saturation, and hue is hereinafter referred to as “color”.
Further, the lightness difference refers to the difference between the absolute values of lightness at each location, and the average brightness refers to the average value of lightness at each location.

  Here, the brightness, saturation, and hue are measured by using a spectrocolorimeter (for example, manufactured by Konica Minolta Co., Ltd.), and the brightness of the measurement object such as the outer decorative portion or the inner decorative portion is measured in another system (for example, Lab color space). After the measurement, the measurement is performed by a method of converting into an HSV system using necessary software (for example, photoshop (registered trademark)).

Further, in this specification and claims, the measurement of each dimension such as the width in the tire radial direction of the inner decorative portion is performed in a no-load state in which a tire is mounted on an applicable rim and filled with a predetermined internal pressure unless otherwise specified. It shall be done in
Here, “applied rim” is an industrial standard effective in the region where tires are produced or used. In Japan, JATMA (Japan Automobile Tire Association) YEAR BOOK is used. In Europe, ETRTO (European Tire and Rim Technical Organization) is used. ) (STANDARDDS MANUAL) in the United States, and the rim defined in YEAR BOOK of TRA (THE TIRE and RIM ASSOCATION INC.) In the United States.
Furthermore, the “predetermined internal pressure” refers to the filling air pressure (maximum air pressure) corresponding to the maximum load capacity of the tire, which is defined according to the tire size in the standard such as JATMA, and the “maximum load capacity” The maximum mass allowed to be loaded on a tire according to the above standards.
The air here can be replaced with nitrogen gas or other inert gas.

  In addition, in this specification and the claims, the term “decoration” includes a plain with no pattern.

In the pneumatic tire according to the present invention, an annular outer decorative portion made of printing disposed in a tire radial outer region of a side portion including a bead portion and a sidewall portion, and an inner side in the tire radial direction of the outer decorative portion And an annular inner decorative portion made of printing, the inner decorative portion having at least a first inner element and a second inner element that are alternately repeated in the tire circumferential direction. The outer decorative part is discontinuous and different from the decoration applied to the inner decorative part, so that the inner decorative part looks different from the outer decorative part, and the inner decorative part is Because it is discontinuous in the direction, the inner decorative part can appear as if it is part of the wheel, meeting the needs of users seeking large diameter rims without increasing the weight of the rim it can.
Also, as a result of the inner decorative part appearing as if it is part of the wheel as described above, only the outer decorative part appears to be the side part of the tire, and is actually rounded. Since at least the outer decorative portion of the side portion appears to be a flat surface, it is possible to meet the user's needs for a tire having a flat surface side without increasing the weight of the tire.

  Here, by making the brightness of the outer decorative portion different from that of the inner decorative portion, the effect of making the inner decorative portion appear to be a part of the wheel, and the outer decorative portion described above, The effect of becoming visible on a flat surface can be enhanced.

When the width of the outer decorative portion in the tire radial direction is D _O , the width of the inner decorative portion in the tire radial direction is D _I, and the sum of D _O and D _I is D, D _O / D is 0. When it is in the range of 3 to 0.6, a visual balance between the outer decorative part visible on the flat surface side part and the inner decorative part visible on a part of the wheel is ensured, and the outer The visual effects of the decorative portion and the inner decorative portion can be made compatible.
That is, when the value of D _O / D is less than 0.3, the width of the outer decorative portion in the tire radial direction becomes too narrow, so that the outer decorative portion becomes difficult to be seen as a flat surface side portion, While the effect of improving the appearance quality is hardly exhibited, when the value of D _O / D exceeds 0.6, the width of the inner decorative portion in the tire radial direction becomes too narrow, so the rim diameter of the inner decorative portion The effect of showing large is difficult to be exhibited.

  And when the boundary between the outer decorative portion and the inner decorative portion is provided in the vicinity of the maximum tire width, the tire having a flat surface on the side portion is formed on the large-diameter rim without giving a strange feeling to the observer. Since it seems to be mounted, the user's preference can be more fully satisfied.

By the way, when the maximum brightness difference between the tire circumferential direction and the radial direction is within 5% in the outer decorative portion, the brightness of the outer decorative portion does not change in any of the tire circumferential direction and the radial direction. Thus, it is possible to enhance the effect that the outer decorative part looks like a smooth surface and the outer decorative part looks like a flat surface.
On the other hand, when the brightness difference of the outer decorative part is larger than 5%, it appears as if a shadow is formed in the tire circumferential direction or the tire radial direction, so that a three-dimensional effect is generated in the outer decorative part and the outer decorative part is formed. The part becomes difficult to be seen as a flat surface.

Further, here, when the first inner element and the second inner element are alternately repeated 3 to 100 times in the tire circumferential direction in the decoration of the inner decorative portion, the first inner element is as if It looks like a wheel spoke, allowing the rim to appear larger.
That is, when the repetition of the first inner element and the second inner element is greater than 100 times, the distance between the first inner elements is too small, so the first inner element is the spoke. The effect of making the rim look larger is reduced.

  When the first inner element of the inner decorative portion is provided to be inclined in the tire circumferential direction with respect to the tire radial direction, for example, the inner decorative portion may have a movement in the rotation direction of the tire. It is possible to make the difference in decoration with the outer decoration part remarkable, and more effectively demonstrate the function of the outer decoration part to make the side part look flat and the function of the inner decoration part to make the rim look larger. be able to.

Then, the inner escutcheon, from its radially outer edge position, radially inward tire, 3 mm or more 10mm or less, or until a position spaced less than 50% of the tire radial width D _I of the inner escutcheon In this area, the brightness increases toward the inside in the tire radial direction, and when the maximum brightness difference is 30% or more, the gradation area of the inner decorative part appears to be recessed compared to the outer decorative part. In addition to further enhancing the effect of making the decorative part look flat, the part of the inner decorative part other than the shadow of the first inner element appears to have lifted, so that the effect of making the inner decorative part appear on the large-diameter rim is also achieved. It can be further enhanced.

When the second inner element of the inner decorative portion includes a color portion with a brightness of 50% or more and a saturation of 15% or more, the second inner element has a saturation of a certain level or more. By changing the texture of the outer decorative portion and the inner decorative portion, it is possible to enhance the effect of making the side surface of the outer decorative portion look flat.
Furthermore, when the saturation of the outer decorative portion is 5% or less, the outer decorative portion is sufficiently close to an achromatic color. The texture of the part is greatly different, and the effect of making the side surface look flat can be further enhanced.

Furthermore, when the color portion has a plurality of line portions that extend in the circumferential direction of the tire to form a decoration, the first inner element is more than when the entire color portion is colored. The effect of making the inner decoration part appear to be a part of the rim can be further enhanced.
In addition, the inner decorative portion, a region from the radially outer edge located radially inward 3mm 10mm or more or less, or until a position spaced less than 50% of the tire radial width D _I of the inner escutcheon When the brightness increases toward the inner side in the tire radial direction and the maximum brightness difference is set to 30% or more, the outer decorative part and the inner decorative part are maintained while maintaining the effect of making the above-mentioned inner decorative part appear on the large-diameter rim. By making the textures of the parts different from each other, the first inner element appears to be further lifted, and the effect that the inner decorative part can be seen as a part of the rim can be further enhanced.

In the above description, the lightness and saturation of the color portion are 50 to 80% lightness, 50 to 100% saturation, or 75 to 100% lightness, and 15 to 80 saturation. %, And when the hue of the color portion is substantially the same as the hue of the vehicle on which the tire is mounted, the decorativeness is further improved by making the tire hue and the hue of the vehicle body uniform. be able to.
That is, when the lightness or saturation is lower than the above range, the decoration effect by the color portion is reduced, while when the lightness or saturation is higher than the above range, the outer decorative portion becomes less conspicuous and the outer decoration It becomes difficult for the portion to exhibit the effect of making the side portion look flat.

Furthermore, in the case of applying a continuous decoration in the tire circumferential direction to the outer decorative part, by increasing the difference in texture between the inner decorative part having a discontinuous decoration in the tire circumferential direction and the outer decorative part, The effect that the outer decorative portion looks like a flat surface can be enhanced.
Further, at least the first outer element and the second outer element having a width in the tire circumferential direction smaller than any of the first inner element and the second inner element are alternately repeated in the tire circumferential direction. When decoration is applied, the number of repetitions of the first outer element and the second outer element of the outer decoration portion is greater than the number of repetitions of the first inner element and the second inner element of the inner decoration portion. As a result, the difference in texture between the outer decorative part and the inner decorative part increases because the outer decorative part and the inner decorative part each have a different feeling of unevenness due to the effect of the illusion, and the outer decorative part becomes flat. The effect of appearing planar can be enhanced.
In addition, when the saturation of the outer decorative portion is set to 5% or less, the outer decorative portion becomes substantially achromatic, thereby further enhancing the effect that the outer decorative portion looks like a flat surface.

  In addition, the decoration of the outer decoration part has a brightness of the first outer element and the second outer element in the range of 10 to 90%, and the first outer element and the second outer element When the difference in brightness is in the range of 50 to 80% and the first outer element and the second outer element are alternately repeated 200 to 1500 times in the tire circumferential direction, the outer decoration part is molded as if Serrations, ridges and the like due to the formation of the carcass ply and the circular irregularities due to the presence of the folded end of the carcass ply that will be present on the tire side portion can be made less noticeable. .

Incidentally, of the first inner element of the inner escutcheon, from the inner edge position of the tire radially inward, radially outward of the tire, up to 30% positions spaced in the tire radial width D _I of the inner escutcheon The brightness of at least a part of the region and the average brightness of the continuous decorations of the outer decoration part, or the higher of the average brightness of each of the first outer element and the second outer element of the outer decoration part The brightness difference is set to a range of 0 to 15%, and the brightness is 10 to 30% in at least one of the regions adjacent to the second inner element of the first inner element of the inner decorative portion. If a region in the range of is provided, a pseudo three-dimensional effect can be given to the first inner element by forming a shadow on the first inner element. Is discontinuous with the second inner element And can be approximated by the spokes of the wheel, and the effect of making the rim look larger can be further enhanced.

FIG. 2 is a cross-sectional view in the width direction showing the half portion of the tire in an unloaded state in which the embodiment of the present invention is assembled to an applied rim and filled with a predetermined internal pressure. The other tire halves have a symmetric configuration with respect to the one shown in the figure. FIG. 2 is a partial side view showing the tire of the embodiment shown in FIG. 1 in an unloaded state in which the tire is assembled to an applied rim and filled with a predetermined internal pressure. It is a side view similar to FIG. 2 which shows other embodiment of this invention. It is a side view similar to FIG. 2 which shows the tire of further another embodiment of this invention. It is a partial side view which shows the vehicle which mounted | wore with the tire shown in FIG. It is a side view under the same conditions as FIG. 2 which shows the Example tire of this invention. It is a side view under the same conditions as FIG. 2 which shows the Example tire of this invention. It is a side view under the same conditions as FIG. 2 which shows the Example tire of this invention. It is a side view under the same conditions as FIG. 2 which shows the Example tire of this invention. It is a side view under the same conditions as FIG. 2 which shows the Example tire of this invention. It is a side view under the same conditions as FIG. 2 which shows the Example tire of this invention. It is a side view under the same conditions as FIG. 2 which shows the Example tire of this invention. It is a side view under the conditions similar to FIG. 2 which shows the comparative example tire of an Example. It is a side view under the conditions similar to FIG. 2 which shows the comparative example tire of an Example.

Embodiments of the present invention will be described below with reference to the drawings.
In addition, the following description is an illustration to the last, and the structure of each part of a tire, an effect, etc. are not limited to this.
A pneumatic tire 10 illustrated in FIG. 1 includes a tread portion 1, a pair of sidewall portions 2 extending inward in the tire radial direction continuously to the side portions of the tread portion 1, and tire radial directions of the sidewall portions 2. Each bead part 3 connected to the inner end is provided.
Hereinafter, the side wall portion 2 and the bead portion 3 are collectively referred to as a side portion 4.

  Here, the pneumatic tire 10 includes at least one carcass ply 6 that extends between the pair of bead portions 3 and that allows radial arrangement. It extends in a toroidal shape across the pair of bead portions 3 via the sidewall portions 2, and is locked by being folded around a bead core 5 embedded in the bead portion 3.

In FIG. 2, an annular outer decorative part 11 and an annular outer decorative part 11 arranged on the outer surface of the tire side part 4 of the pneumatic tire 10 shown together with the applied rim 41 are arranged on the inner side in the tire radial direction of the outer decorative part 11. While each of the inner decorative portions 21 is formed by printing, a marking made of a conventional uneven surface indicating, for example, a tire size or the like is applied between the inner decorative portion 21 and the rim line position 32.
In FIG. 2, the outer decorative portion 11 and the inner decorative portion 21 are formed adjacent to each other, but the outer decorative portion 11 and the inner decorative portion 21 may be disposed separately.
In the figure, the mark 31 indicating the company name or the like is formed on the outer decorative portion 11 by printing. Instead, the mark 31 is formed on the inner decorative portion 21 by printing. You can also.

By the way, each of the annular outer decorative portion 11 and the inner decorative portion 21 is preferably formed to be completely annular, that is, continuously formed over one circumference in the tire circumferential direction, in order to more fully exhibit the effects of the present invention. However, it can also be formed intermittently. In this latter case, the number of repetitions of the first inner element and the second inner element, which will be described later, is counted by the number of repetitions when the inner decorative portion 21 is formed continuously without being interrupted in the tire circumferential direction. It shall be. Similarly, the number of repetitions of the first outer element and the second outer element is also counted by the number of repetitions when the outer decorative portion is formed continuously.
As shown in the figure, by forming the outer decorative portion 11, the inner decorative portion 21, and the mark 31 by printing, the decorativeness of the tire can be improved, and the side surface of the outer surface of the side portion can be eliminated by printing. By doing so, the air resistance at the time of driving | running | working decreases, a fuel consumption performance improves, and since it becomes difficult to generate | occur | produce the crack to a tire side part, durability can be improved.

On the other hand, an unintended disappearance due to wear or the like can be effectively prevented by marking the inscribed region 32 on the inner peripheral side of the inner decorative portion 21 with an uneven surface.
In addition, when the tire is mounted on the vehicle and traveled, the stamped region 32 is located on the inner side in the tire width direction with respect to the tire maximum width position, so that the air (wind pressure) from the front in the traveling direction of the vehicle Since the marking area 32 becomes a blind and most of the marking area 32 is not directly exposed to the air from the front in the vehicle traveling direction, the influence of the marking on the air resistance is relatively small.

Further, the outer decorative portion 11 and the inner decorative portion 21 are provided with different discontinuous and different decorations, and the inner decorative portion 21 is provided with a first inner element 22 and a second inner element 23. It is formed alternately and repeatedly. As a result, the inner decorative portion 21 is made different from the outer decorative portion 11, and the first inner element 22 and the second inner element 23 of the inner decorative portion 21 are discontinuous in the tire circumferential direction. By alternately and repeatedly forming, the inner decorative portion 21 can appear as if it is a part of the wheel 41, and the user's needs for a large-diameter rim can be met without increasing the weight of the rim. Can do.
In order to make the inner decoration part 21 appear as a part of the wheel, it is desirable that the coloring of at least a part of the inner decoration part 21 is matched with the coloring of the wheel.

  Further, by making the inner decorative portion 21 appear to be a part of the wheel 41, only the outer decorative portion 11 can be seen on the side portion of the tire, so in fact, the outer decorative portion of the rounded side portion 4 is visible. Since the portion 11 can be seen as a flat surface, it is possible to meet the user's needs for a tire having a flat surface on the side portion without increasing the weight of the tire.

  Here, when the brightness of the outer decorative portion 11 and that of the inner decorative portion 21 are different, the outer decorative portion 11 looks more different from the inner decorative portion 21, so that the inner decorative portion It is possible to enhance the effect of making it appear to be a part of the wheel and the effect of making the outer decorative part visible on a flat surface.

  By the way, as illustrated in FIG. 2, when the outer decoration portion 11 is a decoration that continues in the tire circumferential direction, or as illustrated in FIG. 3, the outer decoration portion 11 has a tire circumference such as a striped pattern. In the case of including the first outer element 11a and the second outer element 11b formed alternately and intermittently in the direction, the inner decorative part having discontinuous decoration in the tire circumferential direction, and the outer By increasing the difference in texture from the decorative part, the effect of making the outer decorative part appear to be a flat surface can be further enhanced.

Further, here, when the width in the tire radial direction between the outer decorative portion 11 and the inner decorative portion 21 is D _O and D _I and D is the sum of D _O and D _I , D _O / D Is in the range of 0.3 to 0.6. In this case, a visual balance between the outer decorative portion 11 that can be seen on the flat surface side portion 4 and the inner decorative portion 21 that can be seen as a part of the wheel 41 is ensured, so that the outer decorative portion 11 and the inner decorative portion can be secured. The decorative effect of the part 21 can be made compatible.
And in the case where the boundary between the outer decorative portion 11 and the inner decorative portion 21 is provided in the vicinity of the tire maximum width position 4a, the tire having a flat side surface without giving the viewer a sense of incongruity, Since it seems to be mounted on the large-diameter rim, the user's preference can be more fully satisfied.

Here, as shown in FIG. 3, in the outer decorative portion 11, the brightness of the first outer element 11 a and the second outer element 11 b in the tire circumferential direction are both in the range of 10 to 90%. The brightness difference between the one outer element 11a and the second outer element 11b can be in the range of 50 to 80%, and the arrangement of the first outer element 11a and the second outer element 11b is, for example, Except for the formation region of chapter 31, it can be repeated alternately 200 to 1500 times.
According to such a printing mode, it seems that serrations, ridges, and the like are formed on the outer decoration portion 11 by molding, and circular irregularities due to the presence of the folded end of the carcass ply 6. The portion can be made less noticeable and the appearance quality of the tire side portion 4 can be improved.
The first outer decorative portion 11a and the second outer decorative portion 11b can be formed radially around the tire rotation axis, and the first outer decorative portion 11a and the second outer decorative portion 11b, Alternatively, the boundary can be formed to be a curved line or a broken line.

Here, in the inner decoration portion 21, when the first inner element 22 and the second inner element 23 are alternately repeated 3 to 100 times in the tire circumferential direction, the number of repetitions of both the elements 22 and 23 is determined. For example, as shown in FIGS. 2 and 3, the number of spokes of the wheel currently on the market is 9 times or less, and the arc width W ₂ in the tire circumferential direction of the second inner element is set to be equal to that of the first inner element. When it is larger than the arc width W _{1 in the} tire circumferential direction, the wheel spokes appear to extend into the first inner element, so that it can appear as if a large-diameter rim is mounted.
Note that if the user purchases the tire and rim separately, the number and shape of the wheel spokes and the decoration of the first inner element of the tire do not necessarily match, but even if they do not match, they are similar. If it does, the effect which shows an inner side decoration part as a part of wheel will be exhibited.
Meanwhile, as shown in FIG. 4 illustrating another embodiment, substantially equal to the arcuate width W ₁ in the tire circumferential direction of the first inner element 22, and a circular arc width W ₂ tire circumferential direction of the second inner element 23 In addition, even when the number of repetitions of both elements 22 and 23 is 30 to 100 times, which is different from the number of wheels currently on the market, the entire inner decoration part 21 is part of the wheel 41. It will look like it can appear to be wearing a large rim.

Incidentally, in FIG. 2, the inner escutcheon 21, the radially inner edge position of the first inner element 22, radially outward of the tire, spaced 30% of the tire radial width D _I of the inner escutcheon The difference in brightness between the average brightness of the three-dimensional element 22a that is a part of the region up to the position and the average brightness of the continuous decoration of the outer decoration part 11 is set to a range of 0 to 15%, and the inner decoration part 21 In the case where the shadow element 22b, which is a region with a lightness in the range of 10 to 30%, is provided at one end portion of the first inner element 22 in the tire circumferential direction, in the drawing, at the right end portion in the circumferential direction, As a result, a shadow is formed on the inner element 22, and a pseudo three-dimensional feeling can be given to the first inner element 22, so that the first inner element 22 looks more like a wheel spoke. That can make the rim look bigger The fruit can be further enhanced.
When the mark 31 is formed in the outer decorative portion 11 or the inner decorative portion 21, the average brightness indicates the average brightness of the portion excluding the mark 31. The same applies to the average brightness of the first outer decorative portion 11a and the second outer decorative portion 11b described below.

  On the other hand, in FIG. 3, the average brightness of the three-dimensional element 22a of the first inner element 22 of the inner decorative portion 21 and the higher average brightness of the first outer decorative portion 11a and the second outer decorative portion 11b. Similarly, when the difference in brightness is in the range of 0 to 15% and the shadow element 22b of the first inner element 22 of the inner decorative portion 21 is provided, the effect of making the rim appear larger can be further enhanced.

Further, the first inner element 22 of the inner decoration portion 21 is provided to be inclined to either side in the tire circumferential direction with respect to the radial direction of the tire, and the inclination is, for example, as shown in FIGS. When the contour of the first inner element 22 is curved in a direction opposite to the direction of rotation of the first inner element 22 so as to be streamlined, the inner decorative portion 21 can have movement in the direction of rotation of the tire. In addition, the difference in decoration from the outer decorative part 11 becomes remarkable, and the effect of making the side part 4 appear as a flat surface by the outer decorative part 11 and the effect of making the rim look larger by the inner decorative part 21 are further enhanced. be able to.
In addition, it can also incline so that an outline may become a straight line, or it may become a polygonal line shape.

As shown in FIGS. 2 to 4, the inner decorative portion 21 is within the range of 3 mm or more and 10 mm or less from the outer edge position in the tire radial direction to the inner side in the tire radial direction, or from the outer edge position of the inner decorative portion 21. of up to a position spaced less than 50% of the radial width D _I, lightness increases toward the radially inside of the tire can be provided an annular gradation region 24 where the maximum brightness difference is 30% or more. In this case, in general, a portion with low lightness appears to be recessed and a portion with high lightness appears to protrude, so that the gradation region 24 appears to be recessed as compared with the outer decorative portion 11, so that the outer decorative portion 11 is flat. The effect of making the shape look like a shape can be further enhanced, and the portion other than the shadow of the first inner element 22 of the inner decorative portion 21 described above appears to be lifted, so that the inner decorative portion can be seen as a large-diameter rim. It can be further increased.
Here, in forming the gradation, the lightness can be changed in an arbitrary manner. For example, the lightness can be linearly increased toward the inside in the tire radial direction.

  Here, the second inner element 23 of the inner decorative portion 21 may include a color portion 23a having a brightness range of 50% or more and a saturation range of 15% or more. In this case, by giving saturation to the second inner element 23, the texture of the outer decorative portion 11 and the inner decorative portion 21 can be greatly different, and the side surface 4 by the outer decorative portion 11 is flattened. The effect of making it look planar can be enhanced.

Furthermore, as shown in FIGS. 2 to 4, when the color portion 23a has a plurality of line portions forming a decoration extending in the tire circumferential direction, the color portion 23a is more colored than the case where the entire color portion 23a is colored. By suppressing the effect that the second inner element 23 appears to rise, the effect that the inner decorative portion 21 appears as a part of the rim can be further enhanced.
Although not clearly shown in FIGS. 2 to 4, the color portion 23 a includes a line portion having a lightness of 90%, a saturation of 100%, and a hue of 200 ° (yellowish green), a lightness of 55%, and a saturation of 85. % And a hue of 130 degrees (blue) are formed repeatedly from the inner side in the tire radial direction. Here, the line is extended in the circumferential direction in a curved posture, but may be a wavy line or the like.

  FIG. 5 shows a vehicle 51 equipped with the pneumatic tire as described above according to the present invention. Here, the brightness and saturation of the color portion 23a are 50 to 80%, the saturation is 50 to 100%, or the brightness is 75 to 100% and the saturation is 15 to 80%. For example, when the difference between the hue of the portion 23a and the hue of the vehicle 51 to which the tire is mounted is adjusted to 0 degrees to 60 degrees, the decoration of the tire 23 and the hue of the vehicle is made uniform. For example, by making the hue of the outer decorative portion 11 different from the hue of the color portion 23 a and the vehicle 51, the outer decorative portion 11 is emphasized and the outer decorative portion 11 flattens the side portion 4. The effect of making it look planar can be further enhanced.

  Examples of tires 1 to 7 according to the present invention and comparative tires 1 and 2 will be prototyped. Each tire is mounted on a vehicle body and visually checked to confirm the size of the rim diameter and the side recognized by the viewer. The flatness of the part was investigated. Specifically, 10 observers observe each of the prototype tires and feel that the rim is larger than the tire without the outer decorative portion and the inner decorative portion, and the side portions feel flat. A questionnaire survey was conducted. The results are shown in Table 1. The size of the rim diameter and the flatness of the side portion are obtained by indicating the result of the survey of each tire as an index, with the result of the survey of the comparative example tire being 100. This shows that the side part is felt flat.

Here, the example tires 1 to 7 and the comparative example tires 1 and 2 have a size of 195 / 65R15, and the width of the tire in the radial direction of the tire is 75 mm. It is assumed that an inner decorative portion and an outer decorative portion, which are spaced apart and have a tire radial width as D _I and D _O , are sequentially adjacent to each other in the tire radial direction.
Note that the distance in the tire radial direction between the boundary between the outer decorative portion and the inner decorative portion and the tire maximum width position is ΔD. When ΔD is positive, it indicates that the inner decorative portion is disposed beyond the tire maximum width position, and when ΔD is negative, the outer decorative portion is disposed beyond the tire maximum width position. Indicates that

In addition, Example tires 1 to 7 were decorated with 80% lightness and 0% saturation on the outer decorative part.
The first inner element of the inner decoration portion was decorated with the saturation kept at 0% and the brightness decreased linearly from the inner side to the outer side in the tire radial direction from 80% to 10%.
On the other hand, the comparative tire 1 was decorated with 80% lightness and 0% saturation on the outer decorative portion and 70% lightness and 0% saturation on the inner decorative portion.
Comparative Example Tire 2 has a decoration of 80% lightness and 0% saturation on the outer decorative portion, a decoration of 10% lightness and 0% saturation in the region 10 mm from the outer edge in the tire radial direction of the inner decorative portion, The other interior decoration part was decorated with 70% lightness and 0% saturation.

  The second inner element of the inner decorative portion of the example tires 1 to 6 and the inner decorative portion of the comparative example tire 2 have a lightness of 90% and a saturation on a ground color of lightness of 80% and saturation of 0%. A line portion 1 having a degree of 100% and a hue of 200 ° (yellowish green) and a line portion 2 having a brightness of 55%, a saturation of 85%, and a hue of 130 ° (blue) are repeatedly formed from the inside in the tire radial direction. . The width in the tire width direction of the line portions 1 and 2 is 1 mm, and the interval in the tire width direction between the line portions is 1.5 mm.

Further, in Example tire 6, a first outer element having a brightness of 90% and a saturation of 0% and a second outer element having a brightness of 10% and a saturation of 0% were repeated 100 times on the outer decorative portion. A serrated decoration was formed.
Moreover, in Example tires 1-7, the brightness is reduced linearly from the inner side to the outer side in the tire radial direction from the outer side in the tire radial direction of the inner decorative part to the width of 10 mm, from 80% to 10%. A gradation area was formed in the area. The saturation of the gradation area was 0%.

From the test results, an example tire provided with an outer decorative portion and an inner decorative portion on the side portion, and a first inner element and a second inner element on the inner decorative portion has a larger rim diameter than the comparative tire. It became clear that the side portion looked flat as well as visible.
Also, by providing a serrated printing part on the outer decorative part, forming a gradation, or providing a color part on the inner decorative part, the rim diameter may appear larger and the side part may appear flat. It was revealed.

DESCRIPTION OF SYMBOLS 1 Tread part 2 Side wall part 3 Bead part 4 Side part 4a Tire maximum width position 5 Bead core 6 Carcass ply 10 Tire 11 Outer decoration part 11a First outer element 11b Second outer element 21 Inner decoration part 22 First inner part Element 22a Solid element 22b Shadow element 23 Second inner element 23a Color part (line part)
31 Mark 32 Marking area 41 Wheel 51 Vehicle D _O Width of outer decoration part in tire radial direction D _I Width of inner decoration part in tire radial direction D Sum of D _O and D _I W ₁ Width in the tire circumferential direction of the first inner element W ₂ Width in the tire circumferential direction of the second inner element

Claims (14)

A pneumatic tire comprising a pair of bead portions in which a bead core is embedded, a pair of sidewall portions extending outward in the tire radial direction from the bead portion, and a tread portion extending between both sidewall portions,
An annular outer decorative portion made of printing disposed on the outer side in the tire radial direction of the side portion including the bead portion and the sidewall portion, and from the printing disposed on the inner side in the tire radial direction of the outer decorative portion. With an annular inner decorative part,
In the inner decoration portion, at least the first inner element and the second inner element are subjected to a decoration that repeats alternately in the tire circumferential direction,
A pneumatic tire in which the outer decoration portion is discontinuously different from the decoration applied to the inner decoration portion.   The pneumatic tire according to claim 1, wherein the outer decorative portion and the inner decorative portion have different brightness. When the width of the outer decorative portion in the tire radial direction is D _O , the width of the inner decorative portion in the tire radial direction is D _I, and the sum of D _O and D _I is D, D _O / D is 0. The pneumatic tire according to claim 1 or 2, wherein the pneumatic tire is in a range of 3 to 0.6.   The pneumatic tire according to any one of claims 1 to 3, wherein a boundary between the outer decorative portion and the inner decorative portion is provided in the vicinity of the maximum tire width.   The maximum brightness difference in the tire circumferential direction and the radial direction of the outer decorative portion is within 5% when the brightness of 100% is the brightest color in each hue and the brightness is 0% in the HSV color space. The pneumatic tire as described in any one of 1-4.   6. The decoration of the inner decoration part according to claim 1, wherein the first inner element and the second inner element are alternately repeated 3 to 100 times in the tire circumferential direction. Pneumatic tire.   The pneumatic tire according to any one of claims 1 to 6, wherein the first inner element of the inner decoration portion is provided to be inclined in the tire circumferential direction with respect to the tire radial direction. The inner escutcheon, from its radially outer edge position, the region of the radially inward tire, 3 mm or more 10mm or less, or until a position spaced less than 50% of the tire radial width D _I of the inner escutcheon The pneumatic tire according to any one of claims 5 to 7, wherein the lightness increases toward the inside in the tire radial direction, and the maximum lightness difference is 30% or more.   The pneumatic tire according to any one of claims 5 to 8, wherein the second inner element of the inner decoration portion includes a color portion having a brightness range of 50% or more and a saturation range of 15% or more.   The pneumatic tire according to claim 9, wherein the color portion includes a plurality of line portions that extend in the tire circumferential direction to form a decoration. The lightness and saturation of the color portion are 50 to 80% lightness, 50 to 100% saturation, or 75 to 100% lightness and 15 to 80% saturation,
The pneumatic tire according to claim 9 or 10, wherein a hue of the color portion is substantially matched with a hue of a vehicle on which the tire is mounted.   In the outer decoration portion, a decoration that is continuous in the tire circumferential direction with a saturation of 5% or less, or at least a width in the tire circumferential direction is smaller than any of the first inner element and the second inner element. The air according to any one of claims 1 to 11, wherein the first outer element and the second outer element having a saturation of 5% or less are subjected to decoration that is alternately repeated in the tire circumferential direction. Enter tire.   The decoration of the outer decorative portion is such that the brightness of the first outer element and the second outer element is in the range of 10 to 90%, and the brightness of the first outer element and the second outer element is The difference is set to a range of 50 to 80%, and the first outer element and the second outer element are alternately repeated 200 to 1500 times in the tire circumferential direction, according to any one of claims 1 to 12. The described pneumatic tire. Wherein the first inner element of the inner escutcheon, the inner edge position of the tire radially inward, radially outward of the tire, the region up to 30% positions spaced in the tire radial width D _I of the inner escutcheon The brightness of at least a part of the brightness and the average brightness of the continuous decorations of the outer decoration part, or the higher of the average brightness of the first outer element and the second outer element of the outer decoration part, respectively. And the difference between 0 and 15%,
The region according to any one of claims 1 to 13, wherein a region having a lightness in a range of 10 to 30% is provided in at least one of the regions adjacent to the second inner element of the first inner element of the inner decorative portion. A pneumatic tire according to claim 1.