JP6549414B2 - tire - Google Patents

Description

  The present invention relates to a tire having a pattern formed on the outer surface.

  Heretofore, it has been practiced to form fine projections on the side portions of a tire to form a pattern having contrast. For example, Patent Document 1 discloses a technique for obtaining a marking that exhibits a large contrast on the surface of the same color by forming a plurality of projections distributed over the entire area of a pattern.

International Publication No. 2012/131089

  The pattern having the above-mentioned contrast exhibits contrast with the surrounding where light is reflected by controlling the reflection of light. However, in Patent Document 1, since the protrusions are anisotropic, the pattern portion may not look uniform when the viewing angle is changed. In order to improve the visibility by controlling the reflection of light with regard to the unevenness formed in the pattern, further devices are required.

  In view of the above facts, in the pattern area of the outer surface of the tire, the present invention improves the uniformity of the appearance when changing the viewing angle and improves the visibility, and the durability of the projections formed in the pattern area It is an object of the present invention to provide a tire with a secured property.

The tire according to the first aspect is formed on the outer surface of the tire, formed in a pattern area having a base portion, and in the pattern area, and having a projection height of 0.1 mm or more and 1.0 mm or less from the base portion And a plurality of unit patterns including extending portions extending in a plurality of directions from the bending point in plan view, and the distance between the bending points of the adjacent unit patterns is 0.2 mm or more and 1.0 mm or less And one unit pattern and another unit pattern adjacent to each other are connected by a connecting portion.

  The pattern area which has a base part is formed in the outer surface of the tire of this invention. Here, the outer surface of the tire refers to a surface visible from the outside, such as a tire side portion, a tread portion, a groove bottom of a tread, and a groove wall. In addition, the tire of the present invention includes both a pneumatic tire and a non-pneumatic tire.

  A plurality of unit patterns are formed in the pattern area. The unit pattern has a protruding height of 0.1 mm or more and 1.0 mm or less from the base portion, and is formed to include extending portions extending in a plurality of directions from the bending point in plan view. And the space | interval of the bending points of adjacent unit patterns is 0.2 mm or more and 1.0 mm or less. By forming such a unit pattern in the base portion, reflection of light incident on the pattern area can be suppressed and contrast with the outside of the pattern area can be obtained.

  In addition, one unit pattern and another unit pattern adjacent thereto are connected by a connecting portion. Therefore, the unit patterns support each other through the connecting portion, the unit patterns are prevented from falling down, and the durability can be improved.

The tire according to the second aspect is characterized in that the connecting portion connects the plurality of unit patterns so that the plurality of unit patterns are continuous from one end to the other end of the pattern area.

  Thus, when manufacturing a tire using a mold by connecting a plurality of unit patterns from one end of the pattern area to the other end, a pattern from the end of the unit pattern in which air at the time of vulcanization is continued It can escape outside the area. As a result, it is possible to suppress the generation of a bear due to air accumulation in the pattern area, and the formability is improved.

The tire according to a third aspect is characterized in that all the unit patterns in the pattern area are continuous from an end of the pattern area.

  As described above, since all unit patterns in the pattern area are continuous from the end of the pattern area, it is possible to further suppress the generation of a bear due to air stagnation in the pattern area.

The tire according to the fourth aspect is characterized in that a continuous zigzag is formed by the extension portions of the unit patterns connected to each other.

  Here, the term “zigzag” means that the extension portions of adjacent unit patterns are in the shape of a broken line extending in different directions with respect to one direction from one end to the other end of the pattern area.

  As described above, by forming the continuous zigzag shape by the extending portion, the reflection angle of the reflected light can be made different even if it is continuous, and the concentration of the reflected light is suppressed. Thereby, the uniformity of how the pattern part looks when the viewing angle is changed can be enhanced, and the visibility can be improved.

In the tire according to the fifth aspect , in the unit patterns adjacent to each other, at least one of the extension portions of one of the unit patterns is different from all the extension portions of the other unit patterns in a plan view It has been extended.

  As described above, by providing the extending portions in different directions in the unit patterns adjacent to each other, the reflection direction of the light reflected from the pattern region can be made different, and the concentration of the reflected light is suppressed. Thereby, when the angle to view is changed, the uniformity of how to look at a pattern part can be improved, and the visibility of the tire outer surface can be improved.

In the tire according to the sixth aspect , the number of the extending portions is three or more, and the angle formed by the adjacent extending portions is equal.

  Thus, by arranging the extending portions of the unit pattern, the extending portions can be supported in a well-balanced manner. Therefore, the unit pattern is less likely to fall apart than in the case where the angles formed by the extension portions are not equal angles, and the durability of the unit pattern can be improved.

The tire according to a seventh aspect is characterized in that the pattern area is formed in a tire side portion.

  The tire side portion can be visually recognized even after the tire is mounted on a vehicle, and thus the appearance can be further improved by forming a pattern region that enhances the contrast.

The tire according to an eighth aspect is characterized in that the pattern area is formed in a groove of the tread.

  Here, the groove of the tread includes both the groove bottom and the groove wall. By forming the pattern area in the tread groove, the contrast between the other tread surface and the tread groove becomes high, and the appearance of the tread portion can be improved by making the groove look deep.

  According to the present invention, in the pattern area of the outer surface of the tire, the uniformity of the appearance when changing the angle of view is enhanced to improve the visibility and secure the durability of the projections formed in the pattern area. Can.

It is a side view of the tire concerning a 1st embodiment. It is a part of pattern area of the tire concerning a 1st embodiment. It is a partially expanded view of the pattern area of the tire concerning a 1st embodiment. (A) is a cross-sectional view taken along the line A-A of FIG. 3, and (B) is a cross-sectional view taken along the line B-B of FIG. 3. It is a partially expanded view of the mark part of the tire concerning a 1st embodiment. It is sectional drawing of the part corresponding to FIG. 4 (A) (B) of the tire which concerns on the modification of 1st Embodiment. It is a part of pattern area of the tire concerning a 2nd embodiment. It is a partially expanded view of the pattern area of the tire concerning a 2nd embodiment. It is a part of pattern area of the tire concerning a 3rd embodiment. It is a partially expanded view of the pattern area of the tire concerning a 3rd embodiment. It is a part of pattern area of the tire concerning a 4th embodiment. It is a partially expanded view of the pattern area of the tire concerning a 4th embodiment. It is a part of pattern area of the tire concerning the modification of a 5th embodiment. It is a partially expanded view of the pattern area of the tire concerning a 5th embodiment. It is a partially expanded view of the pattern area of the tire concerning a 6th embodiment. It is Table 1 which shows the result of a test example.

  First Embodiment

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. A side view of a tire 10 according to the present embodiment is shown in FIG. In the present embodiment, the tire circumferential direction is indicated by C, and the tire radial direction is indicated by R.

  A mark portion 14 is formed on the tire side portion 12 of the tire 10. The mark portion 14 is in the shape of a belt-like arc and is formed at two symmetrical positions with respect to the tire center axis CE (see FIG. 1). A pattern area 20 and a character area 16 are disposed in the mark portion 14. The character area 16 is displayed by, for example, the characters "ABCDEFGH" displayed on a smooth surface. In the mark portion 14A on the upper side of the paper surface of FIG. 1, the pattern area 20 is a kind of decorative band except for the character area 16 of the mark section 14A, and is formed to surround the character area 16. On the other hand, in the mark portion 14B on the lower side of the drawing sheet of FIG. 1, the pattern area 20 is the same area as the character area 16 of the mark section 14B, and portions other than the character area 16 of the mark section 14B are tire side portions The outer surface is the same as that of the twelve marks 14. In the present embodiment, the mark unit 14A will be described. In addition, the mark part 14 containing the pattern area 20 can be formed by providing the unevenness | corrugation corresponding to the inside of the mold of a tire by laser processing. In addition, it is preferable that the pattern area 20 is disposed outside the tire radial direction R than the tire maximum width portion (the maximum portion of the linear distance between the tire side portions).

  As shown in FIG. 2, the pattern area 20 has a base 22. The base portion 22 forms a bottom surface in the pattern area 20, and a first asterisk protrusion 24 and a second asterisk protrusion 26 are formed as a unit pattern from the base portion 22.

  As shown in FIG. 3, the first asterisk protrusions 24 have the same first extension 25 A- 1, 25 A- 2, and the same shape extended linearly in different directions from the center O 1 as the inflection point. It is comprised by 2 extension part 25 B-1 and 25 B-2, and 3rd extension part 25 C-1 and 25 C-2. Hereinafter, these six extension parts are collectively called "the extension part 24E." The first extending portion 24E and the other extending portions 24E (excluding those extending in opposite directions from the center O1) form a linear shape bent at the center O1. The first extending portion 25A-1 and the first extending portion 25A-2 extend in opposite directions from the center O1, and the first extending portion 25A-1 and the first extending portion 25A-2 A linear and continuous shape is configured. Hereinafter, 1st extension part 25A-1 and 1st extension part 25A-2 are collectively called "1st extension part 25A." The second extension 25B-1 and the second extension 25B-2 also extend in the opposite direction from the center O1, and the second extension 25B-1 and the second extension 25B-2 And a linear continuous shape is formed. Hereinafter, the second extending portion 25B-1 and the second extending portion 25B-2 will be collectively referred to as a "second extending portion 25B". The third extending portion 25C-1 and the third extending portion 25C-2 also extend in opposite directions from the center O1, and the third extending portion 25C-1 and the third extending portion 25C-2 And a linear continuous shape is formed. Hereinafter, the third extension 25C-1 and the third extension 25C-2 will be collectively referred to as a "third extension 25C".

  The six extending portions 24E form an angle of 60 ° with the adjacent extending portions 24E. In other words, the first asterisk protrusion 24 has a shape in which six extending portions 24E are radially extended from the center O1. In the first asterisk protrusions 24, the first extending portions 25A-1 and 25A-2 extend substantially along the tire radial direction R.

  As shown in FIG. 4, in the first asterisk protrusion 24, the cross section in the direction orthogonal to the extending direction of each of the extending portions 24 </ b> E has a substantially isosceles triangle shape having a flat top. Hereinafter, the top of the first extension 25A will be referred to as the first top 23A, the top of the second extension 25B as the second top 23B, and the top of the third extension 25C as the third top 23C. The height from the base 22 to each of the first top 23A, the second top 23B, and the third top 23C (hereinafter referred to as "protruding height H1") is 0.1 mm or more and 1.0 mm or less. Hereinafter, the first top 23A, the second top 23B, and the third top 23C are collectively referred to as a first top 23A to a third top 23C. In addition, it is more preferable to set protrusion height H1 within the range of 0.2 mm or more and 0.8 mm or less.

  As shown in FIG. 4A, in the first asterisk protrusion 24, the base portion 22 between the first extending portion 25A and the second extending portion 25B is flat, and the first extending portion 25A is formed. The base portion 22 between the second extension portion 25C and the third extension portion 25C is curved. Further, as shown in FIG. 4B, in the second asterisk projection 26 described later, the base portion 22 between the first extending portion 27A and the second extending portion 27B is flat, The base 22 between the extension 27A and the third extension 27C is curved. By forming the base portion 22 in a curved shape, reflection of incident light is suppressed, the contrast with the outside of the pattern region 20 is increased, and the visibility is improved.

  The first side wall surface 23WA that constitutes the oblique side of the isosceles triangle of the first extension portion 25A, the second side wall surface 23WB that constitutes the oblique side of the isosceles triangle of the second extension portion 25B, and the third extension The third side wall surface 23WC forming the oblique side of the isosceles triangle of the portion 25C is such that the distance S between the side wall surfaces on both sides increases from the top to the base portion 22 when viewed in a cross section orthogonal to the extending direction ing. The first side wall surface 23WA, the second side wall surface 23WB, and the third side wall surface 23WC form an angle θ with respect to the virtual vertical plane F with respect to the base portion 22. The angle θ 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 reflected light at the first side wall surface 23WA to the third side wall surface 23WC returning outward from between the extension portions 24E increases, and the improvement in visibility is small. Become. That is, the light is reflected, the difference in contrast with the outside of the pattern area 20 is reduced, and the improvement in visibility is reduced. On the other hand, when the angle θ is smaller than 5 °, the extension portion 24E tends to fall down. Therefore, the angle θ is 5 ° in consideration of the effect of preventing the reflected light of light entering between the extension portions 24E from coming back from between the extension portions 24E and the durability of the extension portions 24E. It is preferable that it is -30 degrees.

  Further, in the extension part 24E, the projection height H1 is preferably 0.8 to 6 times the base length B1 of the isosceles triangle (the distance between the bases of the side wall surfaces of the base part 22). When the projection height H1 is smaller than 0.8 times the base length B1, the ratio of reflected light at the first side wall surface 23WA to the third side wall surface 23WC to the outside from the extending portion 24E increases, There is less improvement in visibility. That is, the light is reflected, the difference in contrast with the outside of the pattern area 20 is reduced, and the improvement in visibility is reduced. On the other hand, when the projection height H1 is larger than six times the bottom side length B1, the first side wall surface 23WA to the third side wall surface 23WC have an angle close to perpendicular to the base portion 22. It becomes easy to fall down. Therefore, in consideration of the effect that the reflected light of the light entering between the extension parts 24E returns to the outside from between the extension parts 24E and the durability of the extension parts 24E, the protrusion height H1 is the bottom side It is preferable that it is 0.8 times to 6 times the length B1.

  The second asterisked projections 26 have the same shape as the first asterisked projections 24 and are arranged to be rotated by 90 ° around the center O1 from the arrangement of the first asterisked projections 24 in plan view. In the second asterisk projection 26, the first extending portions 25A-1, 25A-2, the second extending portions 25B-1, 25B-2, and the third extending portions 25C-1, 25C of the first asterisk protrusion 24. -2, part corresponding to the center O1 is a first extension 27A-1, 27A-2, a second extension 27B-1, 27B-2 and a third extension 27C-1, 27C-2 , Called center O2. Hereinafter, the above-mentioned six extension parts are collectively called "extension part 26E." Further, portions corresponding to the first top 23A, the second top 23B, and the third top 23C are referred to as a first top 28A, a second top 28B, and a third top 28C. Hereinafter, the first top 28A, the second top 28B, and the third top 28C will be collectively referred to as a first top 28A to a third top 28C. Further, portions corresponding to the first side wall surface 23WA, the second side wall surface 23WB, and the third side wall surface 23WC are referred to as a first side wall surface 28WA, a second side wall surface 28WB, and a third side wall surface 28WC. Hereinafter, the first side wall surface 23WA, the second side wall surface 23WB, and the third side wall surface 23WC will be collectively referred to as a first side wall surface 23WA to a third side wall surface 23WC. The three side wall surfaces 28WC are collectively referred to as a first side wall surface 28WA to a third side wall surface 28WC. As described above, by arranging the second asterisk projection 26, the extending portion 24E and the extending portion 26E have different extending directions.

  The first asterisk protrusions 24 and the second asterisk protrusions 26 are alternately arranged in the tire radial direction R and the tire circumferential direction C so as to fill the entire pattern area 20. The tip of each of the first extension portions 25A-1 and 25A-2 of the first asterisk protrusion 24 is a second extension portion 27B-2 and a third extension of the second asterisk protrusion 26 adjacent in the tire radial direction R. The second extension 27B-1 and the third extension 27C-2 are respectively inserted between the portion 27C-1. The tip of each of the first extending portions 27A-1 and 27A-2 of the second asterisk protrusion 26 is the second extending portion 25B-1 and the third extension of the first asterisk protrusion 24 adjacent in the tire circumferential direction C. Between the portion 25C-2, it is inserted between the second extending portion 25B-2 and the third extending portion 25C-1.

  The first asterisk protrusion 24 and the second asterisk protrusion 26 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 "interval P") of 0.2 mm or more and 1.0 mm. It is said that In addition, the extension direction length from the tip of the first extension 25A-1 to the tip of the first extension 25A-2, the second extension 25B-2 from the tip of the second extension 25B-1 The extension direction length to the tip of the same and the extension direction length from the tip of the third extension 25C-1 to the tip of the third extension 25C-2 are equal, and the first asterisk protrusion in plan view The longest length of 24 is considered. This length is hereinafter referred to as "extension length L". The extension length L is set to be longer than the interval P. The length in the extension direction from the tip of the first extension 27A-1 to the tip of the first extension 27A-2, the second extension 27B-2 from the tip of the second extension 27B-1 The extension direction length to the tip of the second extension 272 and the extension direction length from the tip of the third extension 27C-1 to the tip of the third extension 27C-2 are the second asterisk protrusions 26 in plan view. And the extension length L is the same length. If the distance P is less than 0.2 mm, the lengths of the extension portions 24E and 26E become short, and it is difficult to ensure formability at the time of manufacture. On the other hand, when the distance P exceeds 1.0 mm, the first asterisk protrusions 24 and the second asterisk protrusions 26 are not densely arranged, and the reflected light at the base portion 22 improves the visibility of the pattern area 20. Less. Therefore, the space | interval P is 0.2 mm or more and 1.0 mm or less. In addition, it is more preferable to set the space | interval P in the range of 0.2 mm or more and 0.8 mm or less. Adjacent first asterisk projections 24 and second asterisk projections 26 are spaced apart.

  A connecting portion 34A is formed between the second extending portion 25B-2 and the second extending portion 27B-1. A connecting portion 34B is formed between the second extending portion 25B-1 and the second extending portion 27B-2. The connecting portions 34A and 34B extend from both ends of the second extending portion 27B in the same direction as the second extending portion 27B and are each 90 ° to the end of the second extending portion 25B adjacent in the tire radial direction R. It is connected to make an angle of. Hereinafter, the connecting portion 34A and the connecting portion 34B will be collectively referred to as a connecting portion 34.

  The cross section of the connecting portion 34 has the same shape as that of the second extending portion 27B. The connecting portion 34, the second extending portion 27B, and the second extending portion 25B are integrally connected, and the second extending portion 27B and the connecting portion 34 are longer than the second extending portion 25B. The straight part is extended. The second extending portion 27B and the second extending portion 25B are continuous in the tire radial direction R via the connecting portion 34. Hereinafter, one continuous second extending portion 27B, the connecting portion 34, and the second extending portion 25B will be referred to as a continuous protrusion 36.

  The continuous projections 36 are formed in a zigzag shape having an amplitude in the tire circumferential direction C while passing through the centers O1 and O2 of the first asterisk protrusions 24 and the second asterisk protrusions 26 and are extended in the tire radial direction R as a whole. ing. The length of the straight line passing through the second extending portion 27B constituting the zigzag is longer than that of the second extending portion 25B. The continuous protrusions 36 are continuously formed in a zigzag shape from the inner end to the outer end of the pattern region 20 in the tire radial direction R.

  Next, the function and effect of the tire according to the present embodiment will be described.

  In the pattern area 20 of the tire side portion 12 as described above, light incident on the first asterisk protrusion 24 and the second asterisk protrusion 26 formed in the pattern area 20 is adjacent to the first side wall surface 23WA to the third side surface. The side wall surface 23WC corresponds to the first side wall surface 28WA to the third side wall surface 28WC. Then, the light is repeatedly attenuated while being repeatedly reflected between the first side wall surface 23WA to the third side wall surface 23WC and the first side wall surface 28WA to the third side wall surface 28WC. As a result, the light reflected to the outside of the pattern area 20 is reduced, and as shown in FIG. 5, the pattern area 20 looks black, and the other areas (the character area 16 and the other tire side portions 12) are relatively It looks white. Therefore, the contrast between the pattern area 20 and the other area can be obtained. As in the present embodiment, the contrast between the pattern area 20 and the character area 16 surrounded by the pattern area 20 is increased, so that the character area 16 can be clearly seen and the visibility can be improved.

  Further, in the pattern area 20 of the present embodiment, the first asterisk protrusions 24 and the second asterisk protrusions 26 are alternately arranged in the tire radial direction R and the tire circumferential direction C, and the extension portion 24E and the extension portion 26E Each has a different extension direction. Therefore, the reflection direction of the light reflected by the pattern area 20 can be made different, and the concentration of the reflected light is suppressed. Thereby, when the angle to look at is changed, the uniformity of how to look at a pattern part can be improved, and visibility can be improved.

  Further, in the present embodiment, the extension direction length L is longer than the distance P between the adjacent first and second asterisk protrusions 24 and 26. Therefore, the first asterisk protrusions 24 and the second asterisk protrusions 26 as unit patterns can be easily arranged in close proximity, and the unit patterns in the pattern area 20 can be densely arranged. By densely arranging the unit patterns, the reflection of light in the pattern area 20 can be further suppressed, and the visibility can be improved.

  Further, in the present embodiment, the first asterisk protrusions 24 are each composed of the extension portions 24E which are extended in different directions and six are connected at the center O1 and the second asterisk protrusions 26 are each in different directions. It consists of an extension 26E which is extended and six are connected at the center O2. Therefore, each of the first asterisk projections 24 and the second asterisk projections 26 is less likely to fall down, and the durability of the individual first asterisk projections 24 and the second asterisk projections 26 can be improved. In addition, since the extension parts 24E and 26E are extended in different directions in the same unit pattern (the first asterisk protrusion 24 and the second asterisk protrusion 26), it is possible to make the reflection angles of reflected light different. And the concentration of reflected light is suppressed. Thereby, when the angle to look at is changed, the uniformity of how to look at a pattern part can be improved, and visibility can be improved.

  In addition, since the first asterisk protrusions 24 and the second asterisk protrusions 26 are disposed independently (spaced apart from each other), even when a crack occurs in the pattern area 20, the development of the crack is suppressed. Can.

  Further, in the first asterisk protrusion 24 and the second asterisk protrusion 26, the angle formed by the extension portions 24E and the extension portions 26E is equal (60 °). Therefore, since the extended portions 24E and 26E can be supported in a well-balanced manner, each of the first asterisk protrusion 24 and the second asterisk protrusion 26 is formed by the extended portions 24E and between the extended portions 26E. The angle is less likely to fall than a non-equal angle, and the durability can be improved.

  The extension 24E and the extension 26E have a substantially isosceles triangular cross section, and the first to third side wall surfaces 23WA to 23WC and 28WA to 28WC can be seen in a cross section orthogonal to the extension direction. Thus, the distance S between the side wall surfaces on both sides increases from the top to the base 22. Therefore, the distance between the adjacent tops 23A to 23C and 28A to 28C becomes wider than the distance on the base 22 side, and light can be made to enter between the extension parts 24E and between the extension parts 26E in a wide range. And since the light which injected between the extension parts 24E and between the extension parts 26E is repeatedly reflected by the side wall surface, it can suppress that reflected light returns outside from between the extension parts.

  Further, by setting the cross sections in the direction orthogonal to the extending direction of the extending portion 24E and the extending portion 26E as described above, it becomes easy to demold at the time of manufacture, and the formability can be improved. As a result, the falling-down of the first asterisk protrusion 24 and the second asterisk protrusion 26 is reduced, and the durability can be improved.

  Furthermore, since the first asterisk protrusion 24 and the second asterisk protrusion 26 are connected by the connecting portion 34, the first asterisk protrusion 24 and the second asterisk protrusion 26 support each other through the connecting portion 34, The fall-down of the 1 asterisk protrusion 24 and the 2nd asterisk protrusion 26 is suppressed, and the durability can be improved. Further, since the second extending portions 25B and 27B are connected to form continuous projections 36 which are continuous from the inner end to the outer end of the pattern area 20 in the tire radial direction R, air during vulcanization can be continuously projected. It can escape from the pattern area 20 from the end of 36. As a result, generation of a bear due to air stagnation in the pattern area 20 can be suppressed.

  In addition, since the continuous protrusions 36 extend in a zigzag shape, the reflection angle of the reflected light can be made different even if continuous, and concentration of the reflected light is suppressed. As a result, it is possible to improve the uniformity of the appearance when changing the viewing angle and to improve the visibility.

  In the present embodiment, the cross sections in the direction orthogonal to the extending direction of each of the extending portion 24E and the extending portion 26E are substantially isosceles triangle, but other shapes, for example, as shown in FIG. The vicinity of the first top 23A to the third top 23C and the first top 28A to the third top 28 may be curved to form the first top 23AR to the third top 23CR, and the first top 28AR to the third top 28CR.

  Moreover, in this embodiment, although the unit pattern (the 1st asterisk protrusion 24 and the 2nd asterisk protrusion 26) was comprised by the extension part 24E extended in 6 directions, and the extension part 26E, it extends in 2 different directions. A unit pattern may be formed by the extended portion to be extended, or extended portions may be extended in three or more different directions to form a unit pattern. In the case where the extension portions extend in three or more different directions, the angles formed by the adjacent extension portions may be equal or different. As in the present embodiment, the extension parts can be supported in a well-balanced manner by making the angles equal.

  Second Embodiment

  Next, a second embodiment of the present invention will be described. In the present embodiment, the same parts as those of the first embodiment are denoted by the same reference numerals, and the detailed description thereof is omitted.

  In the tire 10 of the present embodiment, a pattern region 20-2 is formed instead of the pattern region 20 of the first embodiment. The pattern area 20-2 mainly differs in that it does not have the connecting portion 34A in the first embodiment, but instead has the connecting portion 38.

  In the present embodiment, as shown in FIG. 7, a connecting portion 34B similar to that of the first embodiment is formed between the second extending portion 25B-1 and the second extending portion 27B-2.

  A connecting portion 38 is formed between the third extending portion 25C-2 and the third extending portion 27C-1. As also shown in FIG. 8, the connecting portion 38 extends from the tip of the third extending portion 25C-2 in the same direction as the third extending portion 25C-2, and the third connecting portion 38 is adjacent in the tire circumferential direction C. It is connected with the extension 27C-1 tip so as to form an angle of 90 °. The connecting portion 38 has the same shape as the third extending portion 25C in cross section. The connecting portion 38, the third extending portion 25C-2, and the third extending portion 27C-1 are integrally connected. The third extending portion 25C is extended by the connecting portion 38 to form a linear portion longer than the other extending portions. The connecting portion 34B, the second extending portion 27B-2, and the second extending portion 25B-1 are integrally connected. The second extending portion 27B is extended by the connecting portion 34B to form a linear portion longer than the other extending portions.

  The second extending portions 27B-2 and the second extending portions 25B-1 are continued in the tire radial direction R via the connecting portions 34B at every other set. The third extending portions 27C-1 and the third extending portions 25C-2 are continued in the tire circumferential direction C via the connecting portions 38 at every other set. Then, the second extending portion 27B-2, the connecting portion 34B, the second extending portion 25B-1, the third extending portion 25C-2, the connecting portion 38, and the third extending portion 27C-1 are connected in this order. A continuous single continuous projection 40 is formed. The continuous protrusion 40 is folded back to the adjacent extension at the center O1, O2 while passing through the centers O1, O2 of the first asterisk protrusion 24 and the second asterisk protrusion 26, and the other first asterisk protrusions 24 and second L Asterisk projection 26 is extended. The continuous projections 40 are extended at an inclination angle in the tire radial direction R as a whole. The continuous protrusions 40 are continuously formed from the inner end to the outer end of the pattern region 20-2 in the tire radial direction R.

  In the pattern area 20-2 of the present embodiment, since the adjacent first asterisk protrusions 24 and the second asterisk protrusions 26 are connected by the connecting portion 34 and the connecting portion 38 which are different in the extending direction, the reflection is performed by the connecting portion It is possible to make the direction of the emitted light different, improve the uniformity of the appearance when changing the viewing angle, and improve the visibility. In addition, the same effect as that of the first embodiment can be obtained.

  Third Embodiment

  Next, a third embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first and second embodiments are denoted by the same reference numerals, and the detailed description thereof is omitted.

  In the tire 10 of the present embodiment, a pattern region 20-3 is formed instead of the pattern region 20 of the first embodiment. The pattern area 20-3 mainly differs from the connecting portion 34 in the first embodiment.

  In the present embodiment, as shown in FIGS. 9 and 10, a connecting portion 42 is formed between the second extending portion 25B-1 and the second extending portion 27B-1. The connecting portion 42 extends from the end of the second extending portion 25B-1 in the same direction as the second extending portion 25B-1, and the end of the second extending portion 27B-1 adjacent in the tire circumferential direction C They are connected at an angle of 90 °. The connecting portion 42 has the same shape as that of the second extending portion 25B-1 in cross section. The second extending portion 27B-1 and the second extending portion 25B-1 are continuous in the tire circumferential direction C via the connecting portion 42. The connecting portion 42, the second extending portion 25B-1, and the second extending portion 27B-1 are integrally connected. The second extending portion 25B-1 is extended by the connecting portion 42, and a linear portion longer than the other extending portions is formed.

  A connecting portion 44 is formed between the third extending portion 25C-1 and the third extending portion 27C-1. The connecting portion 44 extends from the end of the third extending portion 27C-1 in the same direction as the third extending portion 27C-1, and is connected to the end of the third extending portion 25C-1 adjacent in the tire radial direction R They are connected at an angle of 90 °. The cross section of the connecting portion 44 has the same shape as that of the third extending portion 27-1. The third extending portion 27C-1 and the third extending portion 25C-1 are continuous in the tire radial direction R via the connecting portion 44. The connecting portion 44, the third extending portion 27C-1, and the third extending portion 25C-1 are integrally connected. The third extending portion 27C-1 is extended by the connecting portion 44 to form a linear portion longer than the other extending portions.

  The second extending portions 25B-1 and the second extending portions 27B-1 are continued in the tire circumferential direction C via the connecting portions 42 at every other set. The third extending portions 27C-1 and the third extending portions 25C-1 are continued in the tire radial direction R via the connecting portions 44 at every other set. The third extension 27C-1, the connection 44, the third extension 25C-1, the second extension 25B-1, the connection 42, and the second extension 27B-1 are connected in this order. A single continuous protrusion 46 is formed. The continuous projection 46 is bent to a non-adjacent extension at the centers O1 and O2 while passing through the centers O1 and O2 of the first asterisk projection 24 and the second asterisk projection 26, and the other first asterisk projections 24 and (2) extended to the asterisk projection 26; The continuous projection 46 is extended at an inclination angle in the tire radial direction R as a whole. The continuous protrusion 46 is continuously formed from the inner end to the outer end of the pattern region 20-3 in the tire radial direction R.

  In the pattern area 20-3 of the present embodiment, since the adjacent first asterisk protrusions 24 and the second asterisk protrusions 26 are connected by the connecting portion 42 and the connecting portion 44 having different extending directions, the reflection is performed at the connecting portion It is possible to make the direction of the emitted light different, improve the uniformity of the appearance when changing the viewing angle, and improve the visibility. In addition, the same effect as that of the first embodiment can be obtained.

  Fourth Embodiment

  Next, a fourth embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first to third embodiments are given the same reference numerals, and the detailed description thereof will be omitted.

  In the tire 10 of the present embodiment, a pattern region 20-4 is formed instead of the pattern region 20 of the first embodiment. The pattern area 20-4 mainly differs in that it has the connecting portion 42 of the third embodiment in place of the connecting portion 34 </ b> A in the first embodiment.

  In the present embodiment, as shown in FIGS. 11 and 12, the connecting portion 42 is formed between the second extending portion 25B-1 and the second extending portion 27B-1. The connecting portion 42 extends from the end of the second extending portion 25B-1 in the same direction as the second extending portion 25B-1, and the end of the second extending portion 27B-1 adjacent in the tire circumferential direction C They are connected at an angle of 90 °. The connecting portion 42, the second extending portion 25B-1, and the second extending portion 27B-1 are integrally connected. The second extending portion 25B-1 is extended by the connecting portion 42, and a linear portion longer than the other extending portions is formed.

  A connecting portion 34B is formed between the outer side in the tire radial direction R of the second extending portion 25B-1 and the tip of the second extending portion 27B-2. The connecting portion 34B extends from the tip end of the second extending portion 27B-2 in the same direction as the second extending portion 27B-2, and the tire diameter of the second extending portion 25B-1 adjacent in the tire radial direction R It is connected at an angle of 90 ° with the direction R outside. The connecting portion 34B, the second extending portion 25B-1, and the second extending portion 27B-1 are integrally connected. The second extending portion 27B-2 is extended by the connecting portion 34B to form a linear portion longer than the other extending portions.

  The second extending portion 25B and the second extending portion 27B are continuous in the tire circumferential direction C and the tire radial direction R via the connecting portions 34B and 42. Then, one continuous projection 48 is formed by being connected in the order of the second extending portion 27B, the connecting portion 34B, the second extending portion 25B-1, and the connecting portion 42. In other words, while the continuous projection 48 passes through the center O2 of the second asterisk projection 26, the second asterisk projections 26 adjacent to each other in the direction inclined with respect to the tire radial direction R are one end of the first asterisk projection 24 And the connecting portions 42, 34B. The continuous projection 48 is extended at an inclination angle in the tire radial direction R as a whole. The continuous protrusions 48 are continuously formed in a zigzag shape from the inner end to the outer end of the pattern region 20-4 in the tire radial direction R.

  In the pattern area 20-4 of the present embodiment, since the adjacent first asterisk protrusions 24 and the second asterisk protrusions 26 are connected by the connecting portion 34B and the connecting portion 42 which are different in the extending direction, the reflection is performed by the connecting portion It is possible to make the direction of the emitted light different, improve the uniformity of the appearance when changing the viewing angle, and improve the visibility. In addition, the same effect as that of the first embodiment can be obtained.

  Fifth Embodiment

  Next, a fifth embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first to fourth embodiments are denoted by the same reference numerals, and the detailed description thereof will be omitted.

  In the tire 10 of the present embodiment, a pattern region 20-5 is formed instead of the pattern region 20 of the first embodiment. The pattern area 20-5 is mainly different in that connecting portions 52 and 54 are formed instead of the connecting portion 34 in the first embodiment.

  The pattern area 20-5 of the present embodiment is, as shown in FIGS. 13 and 14, a connecting portion formed between the tip of the first extending portion 25A-1 and the center O2 of the second asterisk projection 26. 52 and a connecting portion 54 formed between the tip of the first extending portion 27A-1 and the center O1 of the first asterisk protrusion 24.

  The connecting portion 52 extends from the tip side of the first extending portion 25A-1 toward the center O2 of the second asterisk protrusion 26, and the second extending portion 27B-2 and the third extending portion 27C-1 It is connected with these between. The cross-sectional shape of the connection portion 52 is the same as that of the first extending portion 25A-1. The connecting portion 52, the first extending portion 25A-1, the second extending portion 27B-2, and the third extending portion 27C-1 are integrally connected. The first extending portion 25A-1 is extended by the connecting portion 52 to form a linear portion longer than the other extending portions. The first extending portion 25A-1 and the second asterisk protrusion 26 are continuous in the tire radial direction R via the connecting portion 52.

  The connecting portion 54 extends from the tip of the first extending portion 27A-1 toward the center O1 of the first asterisk protrusion 24 and between the second extending portion 25B-1 and the third extending portion 25C-2. Are linked with these. The cross-sectional shape of the connection portion 54 is the same as that of the first extending portion 27A-1. The connecting portion 54 and the first extending portion 27A-1, the second extending portion 25B-1, and the second extending portion 25C-2 are integrally connected. The first extending portion 27A-1 is extended by the connecting portion 54 to form a linear portion longer than the other extending portions. The first extending portion 27A-1 and the first asterisk protrusion 24 are continuous in the tire circumferential direction C via the connecting portion 54.

  The first asterisk protrusion 24 and the second asterisk protrusion 26 are connected in the order of the first extending portion 27A-1, the connecting portion 52, the first extending portion 25A-1, and the connecting portion 54, and one continuous one is formed. A continuous projection 50 is formed. The continuous projection 50 is extended by bending 90 ° at the centers O1 and O2 while passing through the centers O1 and O2 of the first asterisk projection 24 and the second asterisk projection 26, and the adjacent first asterisk projections 24 or the second projections 24 are extended. It is connected with the asterisk protrusion 26. The continuous protrusions 50 extend in a zigzag shape with an inclination angle in the tire radial direction R as a whole. The continuous protrusions 50 are continuously formed from the inner end to the outer end of the pattern region 20-5 in the tire radial direction R.

  In the pattern area 20-5 of the present embodiment, since the adjacent first asterisk protrusions 24 and the second asterisk protrusions 26 are connected by the connecting portion 52 and the connecting portion 54 having different extending directions, the reflection is performed at the connecting portion It is possible to make the direction of the emitted light different, improve the uniformity of the appearance when changing the viewing angle, and improve the visibility. In addition, the same effect as that of the first embodiment can be obtained.

  Sixth Embodiment

  Next, a sixth embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first to fifth embodiments are denoted by the same reference numerals, and the detailed description thereof will be omitted.

  The tire 10 of this embodiment is different from the first to fifth embodiments in that the pattern region 20 is formed in the tread 30, and the configuration of the pattern region 20 is the same as the first to fifth embodiments. .

  As shown in FIG. 15, the tire 10 is provided with a tread 30 on the outer side in the tire radial direction. The tread 30 has a plurality of circumferential grooves 32 formed therein. A mark portion 14 having a character area 16 and a pattern area 20 is formed at the groove bottom 32A of one circumferential groove 32. The pattern area 20 can have the same configuration as that of the first to fifth embodiments.

  In the present embodiment, the contrast between the character area 16 of the mark portion 14 formed in the groove bottom 32A of the tread 30 and the pattern area 20 can be increased, and the visibility of the tread 30 can be improved.

  The tires 10 according to the first to sixth embodiments may be pneumatic tires or non-pneumatic tires.

  <Test example>

  In order to prove the effect of the present invention, the tires of Examples 1 to 7 to which the present invention was applied and the tires of Comparative Examples 1 to 5 were prepared, and the following Tests 1 and 2 were performed.

  (Test conditions)

  As a test tire, a tire having a size of 205 / 55R16 and a tire cross-sectional height SH of 114 mm was used.

  The tires of Examples 1 to 7 and Comparative Examples 1 to 5 are tires having the same structure as the tire according to the first embodiment of the present invention, and the first asterisk protrusions formed in the pattern area 20 of the mark portion 14A. As shown in Table 1 of FIG. 16, the spacing P, the projecting height H1, and the angle θ of the second asterisk protrusions 26 are different from each other.

  The tire of Comparative Example 5 is further different in that the first asterisk protrusion 24 and the second asterisk protrusion 26 formed in the pattern area 20 are not connected by the connecting portion 34 (the connecting portion 34 is not formed). There is.

  (Test 1)

  In Test 1, the visibility when the pattern area was viewed from each direction was evaluated.

  First, each test tire was assembled to the application rim, and then 20 viewers observed it and conducted a questionnaire survey to see if the pattern area appeared darker than a normal tire. The results are shown in Table 1 as "visibility". In Table 1, when the number of viewers who answered that the pattern area looked darker than a normal tire is 18 or more, A is evaluated as B, 10 to 17 as B, and 9 or less as C. did. Table 1 also shows the number of viewers who answered that the pattern part appeared black.

  (Test 2)

  In Test 2, the moldability of the projections constituting the pattern portion was evaluated.

  The incidence rate of falling down of the first and second asterisk protrusions 24 and 26 after production is less than 0.1% ○, and the incidence rate of falling is 0.1% or more and less than 0.3% △ The occurrence rate of falling down is shown in Table 1 as x.

  As shown in Table 1, it is understood that the tires of Examples 1 to 7 to which the present invention is applied have both the visibility and the formability improved as compared with the tires of Comparative Examples 1 to 5.

10 tires, 12 tire side portions, 20 pattern areas, 22 base portions 24 first asterisk projections (unit pattern),
25A, 27A first extension (extension)
25B, 25BL, 27B, 27BL second extension (extension)
25C, 25CL, 27C, 27CL third extension (extension)
26 2nd asterisk protrusion (unit pattern), 30 tread 32 circumferential groove (groove)
34, 38, 42, 44, 52, 54 Connection part P distance, H1 protrusion height

Claims (7)

A pattern area formed on the outer surface of the tire and having a base portion;
A unit pattern which is formed in the pattern area and which constitutes a plurality of projections including a bending point and extending portions extending in a plurality of directions from the bending point in plan view;
It is formed in the pattern area, is adjacent to the unit pattern, and is parallel to the extension direction of the at least one extension from the other inflection point different from the inflection point in plan view and the other inflection point And other unit patterns constituting a plurality of other protrusions formed including other extending portions extended in a plurality of directions other than
Have
In the unit pattern and the other unit pattern, one extension portion in the unit pattern and one other extension portion in another unit pattern adjacent to the extension portion are connected by a connecting portion. And are alternately arranged multiple
The unit pattern and the other unit patterns, said base portion from 0.1mm or more, protrude below the projection height 1.0 mm, and the spacing between the other bending points and the bending points adjacent Is 0.2 mm or more and 1.0 mm or less,
tire. The connecting portion, wherein said from one end to the other end of the pattern area so that a plurality of the unit patterns and other unit patterns is continuous, connecting the plurality of the unit pattern and the other unit patterns, it The tire according to claim 1. The tire according to claim 2, wherein all the unit patterns and the other unit patterns in the pattern area are continuous from an end of the pattern area. 4. A continuous zigzag is formed by the extension of the unit patterns connected to each other and the other extension of the other unit pattern. Tires described in. The extending portion and the other extending portion is 3 or more, the angle of the extending portions and the other of the extending portions adjacent forms are an equal angle, claims 1 to 4 The tire according to any one of the above. The tire according to any one of claims 1 to 5 , wherein the pattern area is formed on a tire side portion. The tire according to any one of claims 1 to 5 , wherein the pattern area is formed in a groove of a tread.

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