JP2019217818A - tire - Google Patents

Abstract

To achieve a tire that can magnify a rim diameter without deteriorating steering stability and fuel efficiency.SOLUTION: A tire 10 comprises: a tread part 12 constituting a tread face of the tire 10; a side wall part 14 constituting a side surface of the tire 10; and an outer black line 18, extended in a tire circumferential direction at a mold split position 16, a boundary between the tread part 12 and the side wall part 14 or in the vicinity of the mold split position 16, which is provided with a unit pattern 20 in which a plurality of protrusions protruding from a base surface 22 by heights of 0.1 mm or more and 1.0 mm or less are formed at intervals of 0.1 mm or more and 1.0 mm or less.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tire.

  Conventionally, fine projections are formed on sidewall portions of a tire to form a pattern region having contrast. For example, Patent Literature 1 discloses a technique in which a plurality of protrusions formed over the entire pattern region provide a large contrast to a sidewall portion of a tire.

International Publication No. 2016/182076

  By the way, it is widely practiced to increase the rim diameter of an applied rim (wheel) for the purpose of improving the appearance and design of a wheel portion of a vehicle. Since the unsprung weight increases, steering stability (hereinafter referred to as “operability”) and fuel efficiency may decrease. Therefore, as in the above-described prior art, it is conceivable that the rim diameter can be made to appear larger without the use of an applied rim having a larger rim diameter by the pattern region provided in the sidewall portion. Further ingenuity is required.

  The present invention has been made in view of the above-described circumstances, and has as its object to obtain a tire that can make a rim diameter appear large without deteriorating drivability or fuel efficiency.

  The tire according to the first aspect of the present invention has a tread portion forming a tread surface of the tire, a sidewall portion forming a side surface of the tire, and a boundary between the tread portion and the sidewall portion. A protrusion extending from the base surface at a height of 0.1 mm or more and 1.0 mm or less from a base surface at a certain mold split position or near the mold split position and having a height of 0.1 mm or more and 1.0 mm or less. And an outer decorative portion provided with a plurality of unit patterns formed at intervals of.

  According to the first aspect of the present invention, the outer side is formed at or near the mold split position, which is the boundary between the tread portion forming the tread surface of the tire and the sidewall portion forming the side surface of the tire. A decorative part is provided. The outer decorative portion extends in the tire circumferential direction and has a unit pattern. In the unit pattern, a plurality of protrusions projecting from the base surface at a height of 0.1 mm or more and 1.0 mm or less are formed at intervals of 0.1 mm or more and 1.0 mm or less. By forming such a unit pattern on the outer decorative portion, light incident on the outer decorative portion is suppressed from being reflected, and a contrast with the outside of the outer decorative portion can be obtained. In other words, since a portion having a different contrast extends in the circumferential direction on the outer side in the tire radial direction in the sidewall portion, when the tire is viewed from outside the vehicle, the viewpoint is easily directed outward in the tire radial direction. The diameter can be felt large.

  The tire according to the second aspect of the present invention is configured such that the sidewall portion constituting the side surface of the tire and the rim line near the rim portion of the applied rim in the sidewall portion extend in the tire circumferential direction. An inner decorative portion provided with a unit pattern in which a plurality of protrusions projecting from the base surface at a height of 0.1 mm or more and 1.0 mm or less are formed at intervals of 0.1 mm or more and 1.0 mm or less. ing.

  According to the second aspect of the present invention, the inner decorative portion is provided on the rim line near the rim portion of the applicable rim in the sidewall portion forming the side surface of the tire. The inner decorative portion extends in the tire circumferential direction and has a unit pattern. In the unit pattern, a plurality of protrusions projecting from the base surface at a height of 0.1 mm or more and 1.0 mm or less are formed at intervals of 0.1 mm or more and 1.0 mm or less. By forming such a unit pattern on the inner decorative part, light incident on the inner decorative part is suppressed from being reflected, and a contrast with the outside of the inner decorative part can be obtained. In other words, since the rim line in the sidewall portion is provided with a portion having a different contrast extending in the circumferential direction, when the tire is viewed from outside the vehicle, the viewpoint is more easily directed outward in the tire radial direction than the rim portion. The rim diameter can be felt large.

  The tire according to the third aspect of the present invention is the tire according to the first aspect, wherein the sidewall portion is extended in a tire circumferential direction by a rim line formed near a rim flange of an applicable rim. And an inner decorative portion having the plurality of unit patterns.

  According to the third aspect of the present invention, the rim line formed near the rim flange of the applicable rim in the sidewall portion is provided with the inner decorative portion having a plurality of unit patterns similar to the outer decorative portion. . That is, the outer decorative portion and the inner decorative portion are provided on the sidewall portion, respectively. Therefore, the portion on the outer side in the tire radial direction than the rim portion is visually further emphasized, so that the rim diameter can be felt large.

  The tire according to a fourth aspect of the present invention is the tire according to the first or third aspect, wherein the sidewall portion has a radially outer portion integrally formed with the outer decorative portion, and the plurality of tires are formed integrally with the outer decorative portion. A central decorative portion configured by the unit pattern of is provided.

  According to the fourth aspect of the present invention, the side wall portion is provided with the central decorative portion constituted by a plurality of unit patterns. Therefore, the central decorative portion of the sidewall portion can provide contrast with the outside of the central decorative portion. In addition, since the central decorative portion is configured such that the portion on the outer side in the tire radial direction is integrally formed with the outer decorative portion, when the tire is viewed from outside the vehicle, the viewpoint is more easily directed outward in the tire radial direction, The rim diameter can be made to feel larger.

  The tire according to the fifth aspect of the present invention is the tire according to the second aspect of the present invention, wherein the sidewall portion has a radially inner portion in the sidewall portion. There is provided a central decorative part integrally formed with the decorative part and configured by the plurality of unit patterns.

  According to the fifth aspect of the present invention, the side wall portion is provided with the central decorative portion constituted by a plurality of unit patterns. Therefore, the central decorative portion of the sidewall portion can provide a contrast with the outside of the pattern region. In addition, since the central decorative portion is formed integrally with the inner decorative portion at a portion in the tire radial direction, when the tire is viewed from outside the vehicle, the central decorative portion and the inner decorative portion can exhibit a sense of unity. it can. Thereby, when the tire is viewed from the outside of the vehicle, the viewpoint can be more easily directed to the central decoration portion and the inner decoration portion located on the outer side in the tire radial direction than the rim portion, so that the rim diameter can be felt large.

  The tire according to the invention described in claim 6 is the tire according to claim 3, claim 4 or claim 3, wherein the outer decorative portion in the side wall portion and A plurality of protrusions having a height of 0.1 mm or more and 1.0 mm or less from the base surface are formed between the inner decorative portion and the height of the plurality of protrusions arranged adjacent to each other gradually decreases. It has a pattern area portion provided with a gradually decreasing area.

  According to the invention described in claim 6, a plurality of protrusions having a height of 0.1 mm or more and 1.0 mm or less from the base surface are formed between the outer decorative portion and the inner decorative portion in the sidewall portion. In addition, there is a pattern region portion provided with a gradually decreasing region in which the heights of the plurality of protrusions arranged adjacent to each other gradually decrease. That is, since the height of the protrusion gradually decreases in the gradually decreasing region, the amount of light reflected to the outside of the tire in the gradually decreasing region increases from a portion having a higher height to a portion having a lower height, and appears to be gradually brighter. In other words, the gradation is given to the brightness in the gradually decreasing region, and the width of the expression of the pattern region portion having the region where the protrusion is formed in the tire can be broader than when the brightness is constant. Therefore, the outer decorative portion and the inner decorative portion can make the rim diameter larger, and can further improve the appearance and design.

  The tire according to the present invention has an excellent effect that the rim diameter can be made large without deteriorating the steerability and the fuel efficiency.

It is a side view of the tire concerning a 1st embodiment. It is a part of the outer decoration part of the tire which concerns on 1st Embodiment. FIG. 2 is a partially enlarged view of an outer decorative portion of the tire according to the first embodiment. FIG. 3A is a cross-sectional view taken along line AA in FIG. 3, and FIG. 3B is a cross-sectional view taken along line BB in FIG. It is a side view of a tire concerning a 2nd embodiment. It is a side view of a tire concerning a 3rd embodiment. It is a side view of a tire concerning a 4th embodiment. It is a side view of a tire concerning a 5th embodiment. It is a side view of a tire concerning a 6th embodiment.

(1st Embodiment)
Hereinafter, a first embodiment of a tire according to the present invention will be described with reference to FIGS. FIG. 1 shows a side view of a tire 10 according to the present embodiment. In the present embodiment, C indicates the tire circumferential direction, and R indicates the tire radial direction.

  A mold split position 16 is provided at a boundary position between the tread portion 12 constituting the tread surface of the tire 10 and the sidewall portion 14 constituting the side surface of the tire 10. The mold split position 16 is defined as a boundary position between a tread mold for forming the tread portion 12 and a side mold for forming the sidewall portion 14. In the tire, the mold split position 16 can be visually recognized outside the sidewall portion 14 in the tire radial direction as a mark of abutment between the tread mold moving in the tire radial direction and the side mold moving in the tire axial direction. it can.

  At the mold split position 16, an outer black line 18 as an outer decorative portion is formed. The outer black line 18 extends in the tire circumferential direction, and is formed concentrically with the tire 10 around the tire center axis CE. The outer black line 18 has a plurality of unit patterns 20, as shown in FIG. The outer black line 18 is provided at the mold splitting position 16, but is not limited thereto, and may be provided near the mold splitting position 16.

  The outer black line 18 has a base surface 22. The base surface 22 forms a bottom surface within the outer black line 18, and a first asterisk protrusion 20 </ b> A and a second asterisk protrusion 20 </ b> B as unit patterns 20 project from the base surface 22. The outer black line 18 can be formed by providing corresponding unevenness in the tire mold by laser processing.

  As shown in FIG. 3, the first asterisk protrusion 20A has first extension portions 20AA-1 and 20AA-2 of the same shape linearly extending in different directions from the center O1 which is a bending point, respectively. It comprises two extending portions 20AB-1, 20AB-2, and third extending portions 20AC-1, 20AC-2. Hereinafter, these six extending portions are collectively referred to as “extending portion 20AE”. The one extension portion 20AE and the other extension portion 20AE (excluding those extending in opposite directions from the center O1) form a linear shape bent at the center O1. The first extension portion 20AA-1 and the first extension portion 20AA-2 extend in opposite directions from the center O1, and are formed by the first extension portion 20AA-1 and the first extension portion 20AA-2. A linearly continuous shape is configured. Hereinafter, the first extending portion 20AA-1 and the first extending portion 20AA-2 are collectively referred to as a "first extending portion 20AA". The second extending portion 20AB-1 and the second extending portion 20AB-2 also extend in the opposite directions from the center O1, and the second extending portion 20AB-1 and the second extending portion 20AB-2 , A linearly continuous shape is formed. Hereinafter, the second extending portion 20AB-1 and the second extending portion 20AB-2 are collectively referred to as a "second extending portion 20AB". The third extending portion 20AC-1 and the third extending portion 20AC-2 also extend in the opposite directions from the center O1, and are connected to the third extending portion 20AC-1 and the third extending portion 20AC-2. , A linearly continuous shape is formed. Hereinafter, the third extension part 20AC-1 and the third extension part 20AC-2 are collectively referred to as a "third extension part 20AC".

  Each of the six extending portions 20AE forms an angle of approximately 60 ° with the adjacent extending portion 20AE. In other words, the first asterisk protrusion 20A has a shape in which six extending portions 20AE are radially extended from the center O1. In the first asterisk projection 20A, the first extension portions 20AA-1 and 20AA-2 extend substantially along the tire circumferential direction C.

  As shown in FIG. 4 (A), in the first asterisk projection 20A, a cross section of the extension 20AE in a direction orthogonal to each extension direction is a substantially isosceles triangle having a flat top. . Hereinafter, the top of the first extension 20AA is referred to as a first top 20AD, the top of the second extension 20AB is referred to as a second top 20AF, and the top of the third extension 20AC is referred to as a third top 20AG. The height from the base surface 22 to each of the first apex 20AD, the second apex 20AF, and the third apex 20AG (hereinafter referred to as “projection height H1”) is 0.1 mm or more and 1.0 mm or less. Hereinafter, the first top portion 20AD, the second top portion 20AF, and the third top portion 20AG are collectively referred to as a first top portion 20AD to a third top portion 20AG. In addition, it is more preferable that the protruding height H1 is set within a range of 0.2 mm or more and 0.8 mm or less.

  In the first asterisk protrusion 20A, the base surface 22 between the first extension portion 20AA and the second extension portion 20AB and the base surface 22 between the second extension portion 20AB and the third extension portion 20AC are: It is flat. Further, as shown in FIG. 4B, in a second asterisk projection 20B described later, the base surface 22 and the second extension part 20BB between the first extension part 20BA and the second extension part 20BB are formed. The base surface 22 between the third extension portion 20BC is flat. The base surface 22 is not limited to a flat shape, but may be a curved shape. By making the base surface 22 curved, reflection of incident light is suppressed, the contrast with the outside of the outer black line 18 is increased, and visibility is improved.

  As shown in FIG. 4A, a first side wall surface 20WA forming the hypotenuse of the isosceles triangle of the first extension 20AA, and a first side wall 20WA constituting the hypotenuse of the isosceles triangle of the second extension 20AB. The second side wall surface 20 </ b> WB and the third side wall surface 20 </ b> WC forming the hypotenuse of the isosceles triangle of the third extension portion 20AC have a distance S between the side wall surfaces on both sides when viewed in a cross section orthogonal to the extending direction. It is longer from the top toward the base surface 22. The first side wall surface 20WA, the second side wall surface 20WB, and the third side wall surface 20WC form an angle θ with respect to a virtual vertical plane F with respect to the base surface 22 (only one is shown in the figure). Is preferably in the range of 5 ° to 30 °, and more preferably in the range of 15 ° to 25 °. When the angle θ is larger than the angle 30 °, the ratio of the reflected light from the first side wall surface 20WA to the third side wall surface 20WC returning to the outside from between the extended portions 20AE increases, and the improvement in visibility is reduced. Become. That is, light is reflected, the difference in contrast between the outer black line 18 and the outer black line 18 is reduced, and the improvement in visibility is reduced. On the other hand, if the angle θ is smaller than 5 °, the extension portion 20AE tends to fall. Therefore, the angle θ is 5 ° in consideration of the effect of suppressing the reflected light of the light incident between the extension portions 20AE from returning to the outside from between the extension portions 20AE and the durability of the extension portion 20AE. It is preferably about 30 °.

  Further, in the extension portion 20AE, the protrusion height H1 is preferably 0.8 to 6 times the base length B1 (distance between the bases of the side wall surfaces on the base surface 22) of the isosceles triangle. When the protruding height H1 is smaller than 0.8 times the base length B1, the ratio of the reflected light from the first side wall surface 20WA to the third side wall surface 20WC returning outward from between the extending portions 20AE increases. The improvement in visibility is reduced. That is, light is reflected, the difference in contrast between the outer black line 18 and the outer black line 18 is reduced, and the improvement in visibility is reduced. On the other hand, if the protruding height H1 is greater than six times the base length B1, the first side wall surface 20WA to the third side wall surface 20WC have an angle close to perpendicular to the base surface 22. It becomes easy to fall down. Therefore, considering the effect of suppressing the reflected light of the light that has entered between the extension portions 20AE from returning to the outside from between the extension portions 20AE, and considering the durability of the extension portion 20AE, the protrusion height H1 is set at the bottom. It is preferably 0.8 to 6 times the length B1.

  As shown in FIG. 3, the second asterisk projection 20B has the same shape as the first asterisk projection 20A, and is arranged to be rotated by 90 ° about the center O1 from the arrangement of the first asterisk projection 20A in plan view. I have. In the second asterisk projection 20B, the first extension 20AA-1, 20AA-2, the second extension 20AB-1, 20AB-2, and the third extension 20AC-1, 20AC of the first asterisk projection 20A. -2, the portion corresponding to the center O1 is divided into the first extending portions 20BA-1, 20BA-2, the second extending portions 20BA-1, 20BB-2, and the third extending portions 20BC-1, 20BC-2. , The center O2 which is the bending point. Hereinafter, the above-mentioned six extending portions are collectively referred to as “extending portion 20BE”. Further, portions corresponding to the first top portion 20AD, the second top portion 20AF, and the third top portion 20AG are referred to as a first top portion 20BD, a second top portion 20BF, and a third top portion 20BG. Hereinafter, the first top portion 20BD, the second top portion 20BF, and the third top portion 20BG are collectively referred to as a first top portion 20BD to a third top portion 20BG. Further, as shown in FIGS. 4A and 4B, portions corresponding to the first side wall surface 20WA, the second side wall surface 20WB, and the third side wall surface 20WC are formed by the first side wall surface 20ZA and the second side wall surface 20ZB. , The third side wall surface 20ZC. Hereinafter, the first side wall surface 20ZA, the second side wall surface 20ZB, and the third side wall surface 20ZC are collectively referred to as a first side wall surface 20ZA to a third side wall surface 20ZC, and the first side wall surface 20WA, the second side wall surface 20WB, and the The three side wall surfaces 20WC are collectively referred to as a first side wall surface 20WA to a third side wall surface 20WC. As described above, by arranging the second asterisk protrusion 20B, the extending direction of the extending portion 20AE is different from that of the extending portion 20BE.

  As shown in FIG. 3, the first asterisk projections 20A and the second asterisk projections 20B are alternately arranged in the tire radial direction R and the tire circumferential direction C so as to fill the entire outer black line 18 (see FIG. 1). Has been. The tip of each of the first extending portions 20AA-1 and 20AA-2 of the first asterisk projection 20A is connected to the first extending portion 20BB-1 and the third extension of the second asterisk projection 20B adjacent in the tire circumferential direction C. The portion is inserted between the first extension portion 20BB-2 and the third extension portion 20BC-2. The tip of each of the first extension portions 20BA-1 and 20BA-2 of the second asterisk projection 20B is connected to the second extension portion 20AB-2 and the third extension portion of the first asterisk projection 20A adjacent in the tire radial direction R. It is inserted between the second extension 20AB-1 and the second extension 20AC-1.

  The first asterisk protrusion 20A and the second asterisk protrusion 20B adjacent in the tire radial direction R and the tire circumferential direction C have an interval between the center O1 and the center O2 (hereinafter, referred to as an "interval P") of 0.1 mm or more and 1.0 mm or more. It is as follows. The length in the extending direction from the tip of the first extension 20AA-1 to the tip of the first extension 20AA-2, and the length of the second extension 20AB-2 from the tip of the second extension 20AB-1. And the length in the extending direction from the tip of the third extending portion 20AC-1 to the tip of the third extending portion 20AC-2 is the same, and the first asterisk projection in plan view. It has a maximum length of 20A. This length is hereinafter referred to as “extended length L”. The extension length L is set longer than the interval P. The length in the extension direction from the tip of the first extension 20BA-1 to the tip of the first extension 20BA-2, and the length of the first extension 20BA-2 from the tip of the first extension 20BA-1. The length in the extension direction from the tip of the third extension portion 20BC-1 to the tip of the third extension portion 20BC-2 is the length of the second asterisk protrusion 20B in plan view. And the same length as the extension length L. If the interval P is less than 0.1 mm, the lengths of the extending portions 20AE and 20BE become short, and it is difficult to ensure the formability during manufacturing. On the other hand, when the interval P exceeds 1.0 mm, the first asterisk protrusion 20A and the second asterisk protrusion 20B are not densely arranged, and the visibility of the outer black line 18 is improved by the light reflected on the base surface 22. Is reduced. Therefore, the interval P is set to 0.1 mm or more and 1.0 mm or less. It is more preferable that the interval P is set in a range from 0.1 mm to 0.8 mm. Adjacent first asterisk projections 20A and second asterisk projections 20B are spaced apart.

  The third extending portion 20AC-1 and the second extending portion 20BC-2 are continuous in the tire circumferential direction C via the connecting portion 20E. The connecting portion 20E extends from the tip of the third extending portion 20AC-1 in the same direction as the third extending portion 20BC-2, and is connected to the tip of the third extending portion 20AC-1 adjacent in the tire circumferential direction C. They are connected so as to form an angle of 90 °. The cross section of the connecting portion 20E has the same shape as the third extending portion 20BC. The connecting portion 20E, the third extending portion 20AC-1, and the third extending portion 20BC-2 are integrally connected.

  The second extending portion 20AB-2 and the second extending portion 20BB-1 are continuous in the tire radial direction R via the connecting portion 20E. The connecting portion 20E is extended from the tip of the second extending portion 20AB-2 in the same direction as the second extending portion 20AB-2, and is connected to the tip of the second extending portion 20BB-1 adjacent in the tire radial direction R. They are connected so as to form an angle of 90 °. The cross section of the connecting portion 20E has the same shape as the second extending portion 20AB. The connecting portion 20E, the second extending portion 20AB-2, and the second extending portion 20BB-1 are integrally connected.

  In the first asterisk projection 20A and the second asterisk projection 20B, the second extension part 20AB-1 and the third extension part 20BC-1 are each curved. The second extending portion 20AB-1 is curved such that the distal end approaches the first extending portion 20AA-1, and the third extending portion 20BC-1 has the distal end approaching the first extending portion 20BA-2. It is curved.

(Operation and Effect of First Embodiment)
Next, the operation and effect of the present embodiment will be described.

  In the present embodiment, an outer black line 18 is provided at a mold split position 16 which is a boundary between the tread portion 12 constituting the tread surface of the tire 10 and the sidewall portion 14 constituting the side surface of the tire 10. ing. The outer black line 18 extends in the tire circumferential direction C and has a plurality of first asterisk protrusions 20A and a plurality of second asterisk protrusions 20B. The first asterisk projection 20A and the second asterisk projection 20B are projections projecting from the base surface 22 at a height of 0.1 mm or more and 1.0 mm or less, as shown in FIGS. 4A and 4B. Each is formed with a plurality of intervals of 0.1 mm or more and 1.0 mm or less. By forming the first asterisk protrusion 20A and the second asterisk protrusion 20B on the outer black line 18, the light incident on the outer black line 18 is suppressed from being reflected, and provides a contrast with the outside of the outer black line 18. be able to. That is, in the outer black line 18, the light incident on the first asterisk protrusion 20A and the second asterisk protrusion 20B formed in the outer black line 18 is adjacent to the outer black line 18, as shown in FIGS. The first side wall surface 20WA to the third side wall surface 20WC, and the first side wall surface 20ZA to the third side wall surface 20ZC that match. The light is attenuated while repeating reflection between the first side wall surface 20WA to the third side wall surface 20WC and the first side wall surface 20WA to the third side wall surface 20WC. Thereby, light reflected to the outside of the outside black line 18 is reduced, and as shown in FIG. 1, the outside black line 18 looks black, and the other area (the other side wall portion 14) looks relatively white. . As described above, the portions having different contrasts extend in the circumferential direction outside the sidewall portion 14 in the tire radial direction, so that when the tire 10 is viewed from outside the vehicle, the viewpoint is directed outward in the tire radial direction. This makes it easier to feel the rim diameter large.

  As shown in FIG. 2, the outer black line 18 has first asterisk protrusions 20A and second asterisk protrusions 20B alternately arranged in the tire radial direction R and the tire circumferential direction C. The extending direction differs from the extending portion 20BE. Therefore, the reflection direction of the light reflected by the outer black line 18 can be made different, and the concentration of the reflected light is suppressed. As a result, when the viewing angle is changed, the uniformity of the appearance of the outer black line 18 is enhanced, and the viewpoint can be more easily directed outward in the tire radial direction, so that the rim diameter can be felt larger.

  Further, as shown in FIG. 3, the length L in the extending direction is longer than the interval P between the adjacent first asterisk projection 20A and second asterisk projection 20B. Therefore, the first asterisk projections 20A and the second asterisk projections 20B as unit patterns are easily arranged close to each other, and the unit patterns on the outer black line 18 can be densely arranged. By densely arranging the unit patterns, light reflection on the outer black lines 18 can be further suppressed, and the visibility of the outer black lines 18 can be improved.

  Furthermore, the first asterisk projections 20A extend in different directions, and each of the first asterisk projections 20A includes six extending portions 20AE connected at the center O1, and the second asterisk projections 20B extend in different directions. Six of them are constituted by extension portions 20BE connected at the center O2. Therefore, each of the first asterisk protrusion 20A and the second asterisk protrusion 20B is hard to fall down, and the durability of each of the first asterisk protrusion 20A and the second asterisk protrusion 20B can be improved. In addition, since the extending portions 20AE and 20BE extend in different directions within the same unit pattern (the first asterisk projection 20A and the second asterisk projection 20B), it is possible to make the reflection angles of reflected light different. And the concentration of reflected light is suppressed. Thereby, when the viewing angle is changed, the uniformity of the appearance of the outer black line 18 can be enhanced, and the visibility can be improved.

  In the outer black line 18, the adjacent first asterisk protrusion 20A and second asterisk protrusion 20B are connected by the connecting portions 20D and 20E having different extending directions. The direction of the light reflected by the light beam 20E can be made different, and the uniformity of the appearance when the viewing angle is changed can be increased, and the visibility can be improved.

  Furthermore, by making the second extension part 20AB-1 and the third extension part 20BC-1 curved, the reflected light reflected by the second extension part 20AB-1 and the third extension part 20BC-1 Concentration is suppressed. Thereby, the uniformity of the appearance when the viewing angle is changed can be enhanced, and the visibility can be improved. In addition, the curved second extension portion 20AB-1 and the third extension portion 20BC-1 make it difficult to see the bottom surface of the base surface 22 and can suppress reflection of light incident on the outer black line 18. . As a result, the contrast between the outer black line 18 and other portions is increased, so that the viewpoint can be more easily directed to the outer black line 18 on the outer side in the tire radial direction, and the rim diameter can be felt large.

  Furthermore, in the first asterisk projection 20A and the second asterisk projection 20B, the angle formed between the extended portions 20AE and between the extended portions 20BE is equal (60 °). Accordingly, the first asterisk protrusion 20A and the second asterisk protrusion 20B are formed by the extension portions 20AE and the extension portions 20BE, respectively, since the extension portions 20AE and the extension portions 20BE can support each other with good balance. This makes it harder to fall than the case where the angle is not equal, and can improve the durability.

  Further, as shown in FIGS. 4A and 4B, the cross section of each of the extending portion 20AE and the extending portion 20BE is substantially an isosceles triangle, and the first to third side wall surfaces 23WA to 23WA. 23WC, 28ZA to 28ZC, when viewed in a cross section orthogonal to the extending direction, the distance S between the side walls on both sides increases from the top to the base surface 22. Therefore, the interval between the adjacent top portions 23A to 23C and 28A to 28C is wider than the interval on the base surface 22 side, and light can be made to enter between the extension portions 20AE and between the extension portions 20BE in a wide range. Since the light incident between the extended portions 20AE and between the extended portions 20BE is repeatedly reflected on the side wall surface, it is possible to prevent the reflected light from returning from between the extended portions to the outside and lowering the contrast. it can.

  Furthermore, by making the cross section in the direction orthogonal to the extending direction of the extending portion 20AE and the extending portion 20BE as described above, the mold can be easily removed at the time of manufacturing, and the moldability can be improved. As a result, the fall of the first asterisk projection 20A and the second asterisk projection 20B is reduced, and the durability can be improved.

(2nd Embodiment)
Next, a tire according to a second embodiment of the present invention will be described with reference to FIG. Note that the same components as those of the above-described first embodiment and the like are denoted by the same reference numerals and description thereof will be omitted.

  The tire 30 according to the second embodiment has a basic configuration similar to that of the first embodiment, and is characterized in that the sidewall portion 14 is provided with an outer character portion 32 as a central decorative portion.

  That is, as shown in FIG. 5, the outer character portion 32 is formed in the sidewall portion 14. The outer character portion 32 has a belt-like arc shape and is formed at two symmetrical positions with respect to the tire center axis CE. The outer character portion 32 is indicated by, for example, the characters “ABCDEFGH” displayed on the base surface 22 similar to the outer black line 18, the plurality of first asterisk protrusions 20 </ b> A, and the plurality of second asterisk protrusions 20 </ b> B (see FIG. 2). Have been.

  The outer character portion 32 has an outer portion in the tire radial direction R formed integrally with the outer black line 18. Therefore, each character of "ABCDEFGH" is integrally formed via the outer black line 18, and the outer character portion 32 and the outer black line 18 have substantially the same appearance. In other words, the outer character portion 32 is arranged inside (in the tire center axis CE side) in the tire radial direction R with respect to the outer black line 18.

(Operation and Effect of Second Embodiment)
Next, the operation and effect of the second embodiment will be described.

  According to the above configuration, the tire 10 of the first embodiment is configured similarly to the tire 10 of the first embodiment except that the outer character portion 32 is provided on the sidewall portion 14. Therefore, the same effect as that of the first embodiment is obtained. Further, the side wall portion 14 is provided with an outer character portion 32 constituted by a plurality of unit patterns. Therefore, the outer character portion 32 of the side wall portion 14 can provide a contrast with portions other than the outer character portion 32 and the outer black line 18. In addition, since the outer character portion 32 is configured such that a portion on the outer side in the tire radial direction is integrally formed with the outer black line 18, the viewpoint is more easily directed outward in the tire radial direction when the tire is viewed from outside the vehicle. Therefore, it is possible to make the rim diameter feel larger.

(Third embodiment)
Next, a tire according to a third embodiment of the present invention will be described with reference to FIG. Note that the same components as those of the above-described first embodiment and the like are denoted by the same reference numerals and description thereof will be omitted.

  The tire 40 according to the third embodiment has a basic configuration similar to that of the first embodiment, and is characterized in that a rim line 42 is provided with an inner black line 44 as an inner decorative portion.

  That is, as shown in FIG. 6, an inner black line 44 is provided on the rim line 42 of the sidewall portion 14. The rim line 42 is a portion corresponding to the rim portion of an applicable rim (not shown), and the inner black line 44 extends in the tire circumferential direction and is formed concentrically with the tire 10 around the tire center axis CE. ing. The outer black line 18 has a base surface 22, a plurality of first asterisk protrusions 20A, and a plurality of second asterisk protrusions 20B (see FIG. 2) as in the first embodiment.

(Operation / Effect of Third Embodiment)
Next, the operation and effects of the third embodiment will be described.

  Also according to the above configuration, the configuration is the same as that of the tire 10 of the first embodiment except that the inner black line 44 is provided on the rim line 42, so that the same effect as that of the first embodiment is obtained. Further, an inner black line 44 is provided on the rim line 42 near the rim portion of the applicable rim in the sidewall portion 14 constituting the side surface of the tire 40. The inner black line 44 extends in the tire circumferential direction, and has a plurality of first asterisk projections 20A and second asterisk projections 20B. The first asterisk projections 20A and the second asterisk projections 20B are projections projecting from the base surface 22 at a height of 0.1 mm or more and 1.0 mm or less, and are formed in a plurality at intervals of 0.1 mm or more and 1.0 mm or less. Have been. By forming the first asterisk protrusion 20A and the second asterisk protrusion 20B on the inner black line 44, the light incident on the inner black line 44 is suppressed from being reflected, and a contrast with the outside of the inner black line 44 is obtained. be able to. In other words, since the rim line 42 in the sidewall portion 14 is provided with a portion having a different contrast extending in the circumferential direction, when the tire is viewed from outside the vehicle, the viewpoint is more easily directed outward in the tire radial direction than the rim portion. Therefore, it is possible to make the rim diameter feel large.

(Fourth embodiment)
Next, a tire according to a fourth embodiment of the present invention will be described with reference to FIG. Note that the same components as those of the above-described first embodiment and the like are denoted by the same reference numerals and description thereof will be omitted.

  The tire 50 according to the fourth embodiment has the same basic configuration as that of the third embodiment, and is characterized in that the sidewall portion 14 is provided with an inner character portion 52 as a central decoration portion.

  That is, as shown in FIG. 7, an inner character portion 52 is formed in the sidewall portion 14. The inner character portion 52 has a belt-like arc shape. The inner character part 52 is displayed by the character of, for example, “225 / 45R17 90W” displayed on the base surface 22 similar to the inner black line 44, the plurality of first asterisk protrusions 20A and the plurality of second asterisk protrusions 20B. I have.

  In the inner character portion 52, a portion inside the tire radial direction R is formed integrally with the inner black line 44. Therefore, each character of "225 / 45R17 90W" is integrally formed via the inner black line 44, and the inner character part 52 and the inner black line 44 have substantially the same appearance. In other words, the inner character part 52 is disposed outside (the tread part 12 side) in the tire radial direction R with respect to the inner black line 44.

(Operation and Effect of Fourth Embodiment)
Next, functions and effects of the fourth embodiment will be described.

  According to the above configuration, the tire 40 of the third embodiment is configured similarly to the tire 40 of the third embodiment except that the inner side character portion 52 is provided on the sidewall portion 14. Therefore, the same effect as that of the third embodiment is obtained. Further, the side wall portion 14 is provided with an inner character portion 52 constituted by a plurality of unit patterns. Therefore, the inner character portion 52 of the side wall portion 14 can provide a contrast with portions other than the inner character portion 52 and the inner black line 44. In addition, since the inner character portion 52 is formed integrally with the inner black line 44 at the portion inside the tire radial direction R, the inner character portion 52 and the inner black line 44 are formed when the tire 50 is viewed from outside the vehicle. A sense of unity can be achieved. As a result, when the tire 50 is viewed from the outside of the vehicle, the viewpoint is more easily directed to the inner character portion 52 and the inner black line 44 located on the tire radial direction outer side than the rim portion, so that the rim diameter is felt large. Can be.

(Fifth embodiment)
Next, a tire according to a fifth embodiment of the present invention will be described with reference to FIG. Note that the same components as those of the above-described first embodiment and the like are denoted by the same reference numerals and description thereof will be omitted.

  The basic configuration of the tire 60 according to the fifth embodiment is the same as that of the first embodiment. The outer black line 18 is provided at the mold split position 16 and the inner black line 44 is provided at the rim line 42. The feature is that it is done.

  That is, as shown in FIG. 8, an outer black line 18 is formed at the mold split position 16 of the sidewall portion 14. The rim line 42 of the sidewall portion 14 is provided with an inner black line 44. That is, a pair of the outer black line 18 and the inner black line 44 is provided.

(Operation and Effect of Fifth Embodiment)
Next, the operation and effects of the fifth embodiment will be described.

  According to the above configuration, the tire 10 is configured in the same manner as the tire 10 of the first embodiment except that the outer black line 18 is provided at the mold splitting position 16 and the inner black line 44 is provided at the rim line 42. Therefore, the same effect as in the first embodiment can be obtained. In addition, since the outer black line 18 and the inner black line 44 are provided on the sidewall portion 14 respectively, a portion outside the tire radial direction R is more visually emphasized than the rim portion. It can make you feel big.

  Note that at least one of the outer character portions 32 and 52 may be provided between the outer black line 18 and the inner black line 44 in the above-described fifth embodiment.

(Sixth embodiment)
Next, a tire according to a sixth embodiment of the present invention will be described with reference to FIG. Note that the same components as those of the above-described first embodiment and the like are denoted by the same reference numerals and description thereof will be omitted.

  The tire 70 according to the sixth embodiment has a basic configuration similar to that of the fifth embodiment, and has a gradation portion 62 as a pattern region portion between the outer black line 18 and the inner black line 44. There is a feature in the point.

  That is, as shown in FIG. 9, the gradation part 62 is provided between the outer black line 18 and the inner black line 44 in the sidewall part 14. The gradation portion 62 has a plurality of projections (not shown) having a projection height of 0.1 mm or more and 1.0 mm or less formed from a base surface (not shown), and the heights of the plurality of projections arranged adjacent to each other gradually decrease. An area is provided. Specifically, the height of the protrusion provided at a portion G (hereinafter, referred to as “portion G”) between the outer black line 18 and the inner black line 44 in the sidewall portion 14 is equal to the height of the outer black line 18 and the height of the protrusion. The height of the first asterisk protrusion 20A and the height of the second asterisk protrusion 20B of the inner black line 44 are substantially the same. That is, the portion G appears black as the outer black line 18 and the inner black line 44.

  Between the portion G in the gradation portion 62 and the outer black line 18, a pattern in which the height of the projection is gradually reduced as approaching the outer black line 18 is formed. That is, the blackness appears to decrease from the portion G toward the outer black line 18. Similarly, between the portion G in the gradation portion 62 and the inner black line 44, a pattern in which the height of the protrusion gradually decreases as approaching the inner black line 44 side is formed. That is, the blackness appears to decrease from the portion G toward the inner black line 44.

(Operation and Effect of Sixth Embodiment)
Next, the operation and effects of the sixth embodiment will be described.

  Even with the above configuration, the tire 50 of the fifth embodiment is configured in the same manner as the tire 50 of the fifth embodiment except that a gradation portion 62 is provided between the outer black line 18 and the inner black line 44. Similar effects can be obtained. Further, between the outer black line 18 and the inner black line 44 in the sidewall portion 14, a plurality of protrusions having a height of 0.1 mm or more and 1.0 mm or less from the base surface are formed and arranged adjacent to each other. It has a gradation portion 62 provided with a gradually decreasing region in which the height of the plurality of projections gradually decreases. That is, since the height of the protrusion gradually decreases in the gradually decreasing region, the amount of light reflected to the outside of the tire 60 in the gradually decreasing region increases from the high portion to the low portion of the protrusion, and appears to be gradually brighter. . That is, the gradation is given to the lightness in the gradually decreasing region, and the expression width of the gradation portion 62 having the region where the protrusion is formed in the tire 60 can be broadened as compared with the case where the lightness is constant. Therefore, the outer decorative portion and the inner decorative portion can make the rim diameter larger, and can further improve the appearance and design.

  In the present embodiment, the pattern is such that the portion G in the gradation portion 62 looks black, and the height of the protrusion gradually decreases as the portion G approaches the outer black line 18 and the inner black line 44 side. That is, the blackness appears to decrease from the portion G toward the outer black line 18 and the inner black line 44. Thereby, the shape of the sidewall portion 14 looks like a concave shape. In general, the sidewall portion 14 is formed in a convex shape toward the outer side in the tire width direction. However, if the convexity is strong, an impression with a high flatness is given, so that the appearance design is deteriorated. On the other hand, by applying the gradation portion 62 having the above-described configuration, even when the sidewall portion 14 is formed in a convex shape, the sense of convexity can be reduced and the appearance design can be improved.

  In the sixth embodiment described above, the gradation portion 62 may be provided with the outer character portions 32 and 52.

  Further, the above-described gradation portion 62 is configured to appear concave, but is not limited to this, and the gradually decreasing region may be appropriately adjusted so as to appear other shapes.

  Further, the outer black line 18, the inner black line 44, the outer character portion 32, and the inner character portion 52 are provided with a first asterisk projection 20A and a second asterisk projection 20B. The configuration is not limited to this, and a configuration in which projections of other shapes are provided may be used.

  Furthermore, the outer character portion 32 and the inner character portion 52 are characters, but are not limited thereto, and may be other than characters.

  In the first asterisk projection 20A and the second asterisk projection 20B, the second extension part 20AB-1 and the third extension part 20BC-1 are each formed in a curved shape, but are not limited thereto. There may be no configuration.

  Further, the unit patterns 20 are the first asterisk protrusions 20A and the second asterisk protrusions 20B, but are not limited thereto, and are formed, for example, in a V-shape when viewed from a direction perpendicular to the base surface 22. Together with each other to form rib-shaped projections formed in a zigzag shape in the tire circumferential direction. As an example, a plurality of zigzag rib-shaped protrusions are formed at intervals P in the tire radial direction. The cross-sectional shape of the rib-like protrusions and the distance P between the center of one rib-like protrusion and the center of the other rib-like protrusion in the adjacent rib-like protrusions are determined by the cross-sectional shape and the distance between the first asterisk protrusion 20A and the second asterisk protrusion 20B. It may be the same as P. Note that the cross-sectional shape of the rib-shaped protrusion may be different from the cross-sectional shape of the first asterisk protrusion 20A or the like. The rib-like projections need not be connected in a V-shape, and the linear elements of the rib-like projections may be arranged independently of each other. Further, the protrusions are not limited to the rib-like protrusions, and may have other shapes.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above, and various modifications other than the above can be made without departing from the spirit of the present invention. Of course.

DESCRIPTION OF SYMBOLS 10 ... tire, 12 ... tread part, 14 ... side wall part, 16 ... mold split position, 18 ... outside black line (outside decoration part), 20 ... unit pattern, 22 ... Base surface, 30 ... Tire, 32 ... Outer character part (center decoration part), 40 ... Tire, 42 ... Rim line, 44 ... Inner black line (Inner decoration part), 50 ... tire, 52 ... inner character part (center decoration part), 60 ... tire, 62 ... pattern area part, 70 ... tire

Claims (6)

A tread that constitutes the tread of the tire,
A sidewall portion constituting a side surface of the tire,
While extending in the tire circumferential direction at or near the mold split position which is the boundary between the tread portion and the sidewall portion, at a height of 0.1 mm or more and 1.0 mm or less from the base surface. An outer decorative portion provided with a unit pattern in which a plurality of projecting protrusions are formed at intervals of 0.1 mm or more and 1.0 mm or less,
A tire having: A sidewall portion constituting the side surface of the tire,
A protrusion extending from the base surface at a height of 0.1 mm or more and 1.0 mm or less from the base surface at a rim line near the rim portion of the applicable rim in the sidewall portion and having a height of 0.1 mm or more and 1 mm or more. An inner decorative portion provided with a plurality of unit patterns formed at intervals of 0.0 mm or less;
A tire having: The sidewall portion is provided with an inner decoration portion extending in the tire circumferential direction at a rim line formed near a rim flange of the applicable rim, and having the plurality of unit patterns,
The tire according to claim 1. The sidewall portion is provided with a central decorative portion in which a portion on the outer side in the tire radial direction is integrally formed with the outer decorative portion and configured by the plurality of unit patterns.
The tire according to claim 1 or claim 3. The side wall portion is provided with a central decoration portion in which a portion on the tire radial direction inner side is integrally formed with the inner decoration portion and is configured by the plurality of unit patterns.
The tire according to claim 4, wherein the tire according to claim 2, claim 3, or claim 3 is cited. A plurality of protrusions having a height of 0.1 mm or more and 1.0 mm or less from the base surface are formed between the outer decorative portion and the inner decorative portion in the sidewall portion, and are arranged adjacent to each other. Having a pattern region portion provided with a gradually decreasing region in which the height of the plurality of protrusions gradually decreases,
The tire according to Claim 3, wherein Claim 3 or Claim 3 refers to Claim 3.