JP7006522B2 - tire - Google Patents

Description

The present invention relates to a tire.

Conventionally, fine protrusions are formed on the sidewall portion of a tire to form a pattern region having contrast. For example, Patent Document 1 discloses a technique of exhibiting a large contrast on a sidewall portion of a tire by a plurality of protrusions formed over the entire pattern region.

International Publication No. 2016/182876

By the way, for the purpose of improving the appearance design of the wheel part of the vehicle, it is widely practiced to increase the rim diameter of the applicable rim (wheel), but when the applicable rim having a large rim diameter is attached, the weight of the wheel is increased. Since the so-called unsprung weight increases, steering stability (hereinafter referred to as "safety") and fuel efficiency may decrease. Therefore, as in the above prior art, it is conceivable that the pattern area provided in the sidewall portion makes the rim diameter look larger without mounting an applicable rim having a large rim diameter, but in order to make the rim diameter look larger. Further ingenuity is required.

In consideration of the above facts, an object of the present invention is to obtain a tire having a large rim diameter without deteriorating maneuverability and fuel efficiency.

The tire according to the first aspect of the present invention is arranged only on the tread portion constituting the tread surface of the tire, the sidewall portion constituting the side surface of the tire, and the outside of the sidewall portion in the tire radial direction. It is extended in a line shape in the tire circumferential direction at the mold split position which is the boundary between the tread portion and the sidewall portion or near the mold split position, and is 0.1 mm or more and 1.0 mm from the base surface. It has an outer decorative portion provided with a unit pattern in which a plurality of protrusions protruding at the following heights are formed at intervals of 0.1 mm or more and 1.0 mm or less.

According to the first aspect of the present invention, the tread portion constituting the tread surface of the tire and the sidewall portion constituting the side surface of the tire are on the outside near the mold split position or the mold split position which is the boundary. A decorative part is provided. This outer decorative portion extends in the tire circumferential direction and has a unit pattern. In the unit pattern, a plurality of protrusions protruding 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, the light incident on the outer decorative portion is suppressed from being reflected, and the contrast with the outside of the outer decorative portion can be obtained. In other words, since the parts of the sidewall that have different contrasts are extended in the circumferential direction on the outer side in the radial direction of the tire, the viewpoint is easily directed to the outer side in the radial direction of the tire when the tire is viewed from the outside of the vehicle. You can make the diameter feel bigger.

The tire according to the second aspect of the invention is arranged only on the sidewall portion constituting the side surface of the tire and inside the sidewall portion in the tire radial direction, and is located near the rim portion of the applicable rim in the sidewall portion. The rim line is extended in a line shape in the tire circumferential direction, and a plurality of protrusions protruding 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. It has an inner decorative portion, which is provided with a unit pattern.

According to the second aspect of the present invention, an inner decorative portion is provided on the rim line in the vicinity of the rim portion of the applicable rim in the sidewall portion constituting the side surface of the tire. This inner decorative portion extends in the tire circumferential direction and has a unit pattern. In the unit pattern, a plurality of protrusions protruding 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 portion, the light incident on the inner decorative portion is suppressed from being reflected, and the contrast with the outside of the inner decorative portion can be obtained. In other words, since the parts with different contrasts are extended in the circumferential direction on the rim line in the sidewall part, the viewpoint is more likely to be directed to the outside in the tire radial direction than the rim part when the tire is viewed from the outside of the vehicle. You can feel the rim diameter large.

In the invention of claim 1, the tire according to the third aspect of the present invention is provided in the sidewall portion in a line shape in the tire circumferential direction at a rim line formed in the vicinity of the rim flange of the applicable rim. In addition, an inner decorative portion having the plurality of unit patterns is provided.

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

In the invention according to claim 1 or 3, the tire according to the fourth aspect of the present invention has a portion on the outer side in the radial direction of the tire integrally formed with the outer decorative portion in the sidewall portion, and the plurality of the tires. The outer character part composed of the unit pattern of is provided.

According to the invention of claim 4, the sidewall portion is provided with an outer character portion composed of a plurality of unit patterns. Therefore, the outer character portion of the sidewall portion can have a contrast with the outside of the outer character portion. In addition, since the outer portion of the outer character portion is integrally formed with the outer decorative portion in the tire radial direction, the viewpoint is more easily directed to the tire radial outer side when the tire is viewed from the outside of the vehicle. You can make the rim diameter feel larger.

In the invention according to claim 4, wherein the tire according to the invention according to claim 5 has a portion inside the tire radial direction in the sidewall portion in the invention according to claim 4, which cites claim 2, claim 3 or claim 3. An inner character portion that is integrally configured with the decorative portion and is composed of the plurality of unit patterns is provided.

According to the fifth aspect of the present invention, the sidewall portion is provided with an inner character portion composed of a plurality of unit patterns. Therefore, the inner character portion of the sidewall portion can provide a contrast with the outside of the pattern area. In addition, since the inner part of the inner character portion in the radial direction of the tire is integrally formed with the inner decorative portion, the inner character portion and the inner decorative portion can give a sense of unity when the tire is viewed from the outside of the vehicle. can. As a result, when the tire is viewed from the outside of the vehicle, the viewpoint can be more easily directed to the inner character portion and the inner decorative portion located on the outer side in the tire radial direction from the rim portion, so that the rim diameter can be felt larger.

The tire according to the invention of claim 6 has a tread portion constituting the tread surface of the tire, a sidewall portion constituting the side surface of the tire, and a boundary between the tread portion and the sidewall portion. A protrusion extending at a certain mold split position or near the mold split position in the tire circumferential direction and protruding from the base surface at a height of 0.1 mm or more and 1.0 mm or less is 0.1 mm or more and 1.0 mm or less. It has an outer decorative portion provided with a plurality of unit patterns formed at intervals of the above, and the sidewall portion is extended in the tire circumferential direction by a rim line formed near the rim flange of the applicable rim. In addition, an inner decorative portion having the plurality of unit patterns is provided, and the space between the outer decorative portion and the inner decorative portion in the sidewall portion is 0.1 mm or more from the base surface. It has a pattern region portion in which a plurality of protrusions having a protrusion height of 0 mm or less are formed and a gradually decreasing region is provided in which the heights of the plurality of protrusions arranged adjacent to each other are gradually reduced.

According to the sixth aspect of the present invention, a plurality of protrusions having a protrusion 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. Moreover, it has a pattern region portion provided with a tapering region in which the heights of a plurality of protrusions arranged adjacent to each other gradually decrease. That is, since the height of the protrusions gradually decreases in the gradually decreasing region, the light reflected to the outside of the tire in the gradually decreasing region increases from the high portion to the low portion of the protrusions and appears to be gradually brightened. That is, a gradation is added to the brightness in the gradually decreasing region, and the range of expression of the pattern region portion having the region where the protrusions are formed in the tire can be widened as compared with the case where the brightness is constant. Therefore, it is possible to further improve the appearance design while making the rim diameter feel larger by the outer decorative portion and the inner decorative portion.

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

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

(First Embodiment)
Hereinafter, the first embodiment of the tire according to the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 shows a side view of the tire 10 according to the present embodiment. In this embodiment, the tire circumferential direction is indicated by C and the tire radial direction is indicated by R.

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

An outer black line 18 as an outer decorative portion is formed at the mold split position 16. The outer black line 18 extends in the tire circumferential direction and is formed concentrically with the tire 10 around the tire central 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 split position 16, but the present invention is not limited to this, and the outer black line 18 may be provided in the vicinity of the mold split 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 20A and a second asterisk protrusion 20B as a unit pattern 20 are projected from the base surface 22. The outer black line 18 can be formed by providing the corresponding unevenness in the mold of the tire by laser processing.

As shown in FIG. 3, the first asterisk projection 20A has the same shape of the first extending portions 20AA-1, 20AA-2, and the first extending portions 20AA-1, 20AA-2, which are linearly extended in different directions from the center O1 which is the bending point. It is composed of two extension portions 20AB-1 and 20AB-2, and a third extension portion 20AC-1 and 20AC-2. Hereinafter, these six extension portions are collectively referred to as "extension portion 20AE". One extending portion 20AE and the other extending portion 20AE (excluding those extending in opposite directions from the center O1) form a curved line shape at the center O1. The first extension section 20AA-1 and the first extension section 20AA-2 are extended in opposite directions from the center O1, and the first extension section 20AA-1 and the first extension section 20AA-2 are formed. A linear and continuous shape is constructed. Hereinafter, the first extension section 20AA-1 and the first extension section 20AA-2 are collectively referred to as "first extension section 20AA". The second extension section 20AB-1 and the second extension section 20AB-2 are also extended from the center O1 in opposite directions to the second extension section 20AB-1 and the second extension section 20AB-2. A linearly continuous shape is formed by. Hereinafter, the second extension section 20AB-1 and the second extension section 20AB-2 are collectively referred to as a "second extension section 20AB". The third extension section 20AC-1 and the third extension section 20AC-2 are also extended from the center O1 in opposite directions to the third extension section 20AC-1 and the third extension section 20AC-2. A linearly continuous shape is formed by. Hereinafter, the third extension section 20AC-1 and the third extension section 20AC-2 are collectively referred to as a "third extension section 20AC".

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

As shown in FIG. 4A, in the first asterisk projection 20A, the cross section in the direction orthogonal to each extension direction of the extension portion 20AE is a substantially isosceles triangle shape 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 top 20AD, the second top 20AF, and the third top 20AG (hereinafter referred to as “protruding height H1”) is 0.1 mm or more and 1.0 mm or less. Hereinafter, the first top 20AD, the second top 20AF, and the third top 20AG are collectively referred to as the first top 20AD to the third top 20AG. It is more preferable that the protrusion height H1 is set within the range of 0.2 mm or more and 0.8 mm or less.

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

As shown in FIG. 4A, the first side wall surface 20WA constituting the isosceles triangle of the first extension 20AA and the isosceles triangle of the second extension 20AB constituting the hypotenuse. The second side wall surface 20WB and the third side wall surface 20WC constituting 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 extension direction. It becomes longer from the top side 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 the virtual vertical surface F with respect to the base surface 22 (only one is shown in the figure). 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 the reflected light from the first side wall surface 20WA to the third side wall surface 20WC returning to the outside from between the extending portions 20AE increases, and the improvement in visibility is small. Become. That is, the light is reflected, the difference in contrast from the outside of the outer black line 18 becomes small, and the improvement in visibility is reduced. On the other hand, if the angle θ is smaller than 5 °, the extending portion 20AE tends to fall down. Therefore, in consideration of the effect of suppressing the reflected light of the light incident between the extending portions 20AE from returning to the outside from between the extending portions 20AE and the durability of the extending portion 20AE, the angle θ is 5 °. It is preferably about 30 °.

Further, in the extending portion 20AE, the protruding 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 protrusion 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 to the outside from between the extension portions 20AE increases. There is less improvement in visibility. That is, the light is reflected, the difference in contrast from the outside of the outer black line 18 becomes small, and the improvement in visibility is reduced. On the other hand, when the protrusion height H1 is larger than 6 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, so that the extension portion 20AE becomes It becomes easy to fall down. Therefore, 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, the protrusion height H1 is the base. 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 so as to be rotated by 90 ° about the center O1 from the arrangement of the first asterisk projection 20A in a plan view. There is. In the second asterisk projection 20B, the first extension portions 20AA-1, 20AA-2, the second extension portions 20AB-1, 20AB-2, and the third extension portions 20AC-1, 20AC of the first asterisk projection 20A. -2, the part corresponding to the center O1 is the first extension part 20BA-1, 20BA-2, the second extension part 20BA-1, 20BB-2, and the third extension part 20BC-1, 20BC-2. , Called the center O2, which is the bending point. Hereinafter, the above-mentioned six extension portions are collectively referred to as "extension portion 20BE". Further, the portions corresponding to the first top 20AD, the second top 20AF, and the third top 20AG are referred to as the first top 20BD, the second top 20BF, and the third top 20BG. Hereinafter, the first top 20BD, the second top 20BF, and the third top 20BG are collectively referred to as the first top 20BD to the third top 20BG. Further, as shown in FIGS. 4A and 4B, the portions corresponding to the first side wall surface 20WA, the second side wall surface 20WB, and the third side wall surface 20WC are the first side wall surface 20ZA and the second side wall surface 20ZB. , 3rd 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 the first side wall surface 20ZA to the third side wall surface 20ZC, and the first side wall surface 20WA, the second side wall surface 20WB, and the first side wall surface 20WB. The three side wall surfaces 20WC are collectively referred to as the first side wall surface 20WA to the third side wall surface 20WC. By arranging the second asterisk protrusion 20B as described above, the extension portion 20AE and the extension portion 20BE have different extension directions.

As shown in FIG. 3, the first asterisk protrusion 20A and the second asterisk protrusion 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 done. The tips of the first extension portions 20AA-1 and 20AA-2 of the first asterisk protrusion 20A are the first extension portion 20BB-1 and the third extension portion 20BB-1 of the second asterisk protrusion 20B adjacent to each other in the tire circumferential direction C. It is inserted between the first extension portion 20BB-2 and the third extension portion 20BC-2, respectively, between the portions 20BC-1. The tips of the first extension portions 20BA-1 and 20BA-2 of the second asterisk protrusion 20B are the second extension portions 20AB-2 and the third extension portion 20AB-2 of the first asterisk protrusion 20A adjacent to each other in the tire radial direction R. It is inserted between the second extension portion 20AB-1 and the third extension portion 20AC-1 between the portions 20AC-2.

The distance between the center O1 and the center O2 (hereinafter referred to as "distance P") of the first asterisk protrusion 20A and the second asterisk protrusion 20B adjacent to each other in the tire radial direction R and the tire circumferential direction C is 0.1 mm or more and 1.0 mm. It is said to be as follows. Further, the length in the extension direction from the tip of the first extension 20AA-1 to the tip of the first extension 20AA-2, and the length from the tip of the second extension 20AB-1 to the second extension 20AB-2. The length in the extending direction to the tip of the third extending portion 20AC-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 are equal, and the first asterisk projection in a plan view is equal. It is said to have the longest length of 20A. This length is hereinafter referred to as "extended 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 20BA-1 to the tip of the first extension 20BA-2, and the length from the tip of the first extension 20BA-1 to the first extension 20BA-2. The length in the extending direction to the tip of the third extending portion 20BC-1 and the length in the extending direction from the tip of the third extending portion 20BC-1 to the tip of the third extending portion 20BC-2 are the second asterisk projection 20B in a plan view. It is said to be the longest length of, and is the same length as the extension length L. When 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 secure moldability at the time of manufacturing. On the other hand, when the distance P exceeds 1.0 mm, the first asterisk protrusion 20A and the second asterisk protrusion 20B are not densely arranged, and the visible light of the outer black line 18 is improved by the reflected light 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 to set the interval P within the range of 0.1 mm or more and 0.8 mm or less. The adjacent first asterisk protrusion 20A and the second asterisk protrusion 20B are spaced apart from each other.

The third extension portion 20AC-1 and the second extension portion 20BC-2 are continuous with each other 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 adjacent to the third extending portion 20AC-1 tip portion in the tire circumferential direction C. They are connected so as to form an angle of 90 °. The connecting portion 20E has the same cross section 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 extends from the tip of the second extending portion 20AB-2 in the same direction as the second extending portion 20AB-2, and is adjacent to the second extending portion 20BB-1 tip portion in the tire radial direction R. They are connected so as to form an angle of 90 °. The connecting portion 20E has the same cross section 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 protrusion 20A and the second asterisk protrusion 20B, the second extension portion 20AB-1 and the third extension portion 20BC-1 are each curved. The tip of the second extension 20AB-1 is curved so as to approach the first extension 20AA-1, and the tip of the third extension 20BC-1 is curved so as to approach the first extension 20BA-2. It is curved to.

(Action / effect of the first embodiment)
Next, the operation and effect of this embodiment will be described.

In the present embodiment, the outer black line 18 is provided at the mold split position 16 which is the 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 second asterisk protrusions 20B. As shown in FIGS. 4A and 4B, the first asterisk protrusion 20A and the second asterisk protrusion 20B are protrusions protruding from the base surface 22 at a height of 0.1 mm or more and 1.0 mm or less. A plurality of each are formed at intervals of 0.1 mm or more and 1.0 mm or less. By forming such a first asterisk protrusion 20A and a 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 contrasts 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 each other as shown in FIGS. 4A and 4B. It corresponds to the matching 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. Then, it 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. As a result, less light is reflected to the outside of the outer black line 18, and as shown in FIG. 1, the outer black line 18 looks black and the other region (other sidewall portion 14) looks relatively white. .. As described above, since the portions of the sidewall portion 14 having different contrasts extend in the circumferential direction on the outer side in the tire radial direction, the viewpoint is directed to the outer side in the tire radial direction when the tire 10 is viewed from the outside of the vehicle. Since it becomes easier, the rim diameter can be made to feel larger.

Further, in the outer black line 18, as shown in FIG. 2, the first asterisk protrusion 20A and the second asterisk protrusion 20B are alternately arranged in the tire radial direction R and the tire circumferential direction C, and the extension portion 20AE and the outer black line 18 are arranged. The extension direction is different from that of the extension portion 20BE. Therefore, the reflection direction of the light reflected by the outer black line 18 can be changed, and the concentration of the reflected light is suppressed. As a result, the uniformity of the appearance of the outer black line 18 when the viewing angle is changed can be improved, the viewpoint can be more easily directed to the outside in the tire radial direction, and the rim diameter can be felt larger.

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

Furthermore, the first asterisk projection 20A is formed by extending portions 20AE in which six asterisk projections 20A are extended in different directions and six are connected by the center O1, and the second asterisk projection 20B is extended in different directions. Six of them are composed of an extension portion 20BE connected by the center O2. Therefore, each of the first asterisk protrusion 20A and the second asterisk protrusion 20B is less likely to fall, and the durability of each of the first asterisk protrusion 20A and the second asterisk protrusion 20B can be improved. Further, since the extending portions 20AE and 20BE are extended in different directions within the same unit pattern (first asterisk projection 20A, second asterisk projection 20B), the reflection angle of the reflected light may be different. It can suppress the concentration of reflected light. As a result, the uniformity of the appearance of the outer black line 18 when the viewing angle is changed can be enhanced, and the visibility can be improved.

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

Further, by making the second extension portion 20AB-1 and the third extension portion 20BC-1 curved, the reflected light reflected by the second extension portion 20AB-1 and the third extension portion 20BC-1 is formed. Concentration is suppressed. As a result, it is possible to improve the uniformity of the appearance when the viewing angle is changed and improve the visibility. Further, the curved second extending portion 20AB-1 and the third extending portion 20BC-1 make it difficult to see the bottom surface of the base surface 22, and can suppress the reflection of the light incident on the outer black line 18. .. As a result, the contrast between the outer black line 18 and other parts is enhanced, 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 larger.

Furthermore, in the first asterisk protrusion 20A and the second asterisk protrusion 20B, the angles formed by the extension portions 20AE and the extension portions 20BE are equal angles (60 °). Therefore, since the extension portions 20AE and the extension portions 20BE can support each other in a well-balanced manner, each of the first asterisk projection 20A and the second asterisk projection 20B is formed by the extension portions 20AE and the extension portions 20BE. It is less likely to fall over than those with non-equal angles, and durability can be improved.

Further, as shown in FIGS. 4A and 4B, the extension portion 20AE and the extension portion 20BE have a substantially isosceles triangular cross section, and the first to third side wall surfaces 23WA to When 23WC and 28ZA to 28ZC are viewed in a cross section orthogonal to the extending direction, the distance S between the side wall surfaces on both sides becomes longer from the top side toward the base surface 22. Therefore, the distance between the adjacent top portions 23A to 23C and 28A to 28C is wider than the distance on the base surface 22 side, and light can be incident between the extension portions 20AE and the extension portions 20BE in a wide range. Then, since the light incident between the extension portions 20AE and the extension portion 20BE is repeatedly reflected on the side wall surface, it is possible to suppress the reflected light returning from between the extension portions to the outside and reducing the contrast. can.

Further, by forming the cross section of the extending portion 20AE and the extending portion 20BE in the direction orthogonal to the extending direction as described above, it becomes easy to die-cut at the time of manufacturing, and the moldability can be improved. As a result, the first asterisk protrusion 20A and the second asterisk protrusion 20B are less likely to collapse, and the durability can be improved.

(Second Embodiment)
Next, the tire according to the second embodiment of the present invention will be described with reference to FIG. The same components as those of the first embodiment described above will be assigned the same number and the description thereof will be omitted.

The tire 30 according to the second embodiment has the same basic configuration as that of the first embodiment, and is characterized in that the sidewall portion 14 is provided with the outer character portion 32 as the 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 strip-shaped arc shape, and is formed at two symmetrical positions with the tire central axis CE in between. The outer character portion 32 is represented by, for example, the characters "ABCDEFGH" displayed on the base surface 22, the plurality of first asterisk protrusions 20A and the plurality of second asterisk protrusions 20B (see FIG. 2) similar to the outer black line 18. Has been done.

In the outer character portion 32, a portion outside the tire radial direction R is integrally formed with the outer black line 18. Therefore, each character of "ABCDEFGH" is integrally configured 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 (the tire center axis CE side) in the tire radial direction R with respect to the outer black line 18.

(Action / effect of the second embodiment)
Next, the operation and effect of the second embodiment will be described.

Even with the above configuration, the same effect as that of the first embodiment can be obtained because the tire 10 is configured in the same manner as the tire 10 of the first embodiment except that the outer character portion 32 is provided on the sidewall portion 14. Further, the sidewall portion 14 is provided with an outer character portion 32 composed of a plurality of unit patterns. Therefore, the outer character portion 32 of the sidewall portion 14 can provide contrast with other than the outer character portion 32 and the outer black line 18. Further, since the outer portion 32 of the outer character portion 32 is integrally formed with the outer black line 18 at the outer portion in the tire radial direction, the viewpoint is more easily directed to the outer side in the tire radial direction when the tire is viewed from the outside of the vehicle. Therefore, the rim diameter can be made to feel larger.

(Third Embodiment)
Next, the tire according to the third embodiment of the present invention will be described with reference to FIG. The same components as those of the first embodiment described above will be assigned the same number and the description thereof will be omitted.

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

That is, as shown in FIG. 6, the inner black line 44 is provided on the rim line 42 in the sidewall portion 14. The rim line 42 is a portion corresponding to the rim portion of the 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 central axis CE. ing. The outer black line 18 has a base surface 22, a plurality of first asterisk projections 20A, and a plurality of second asterisk projections 20B (see FIG. 2) as in the first embodiment.

(Action / effect of the third embodiment)
Next, the operation and effect of the third embodiment will be described.

Even with the above configuration, since the tire 10 is configured in the same manner as the tire 10 of the first embodiment except that the inner black line 44 is provided on the rim line 42, the same effect as that of the first embodiment can be obtained. Further, an inner black line 44 is provided on the rim line 42 in the vicinity of 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 protrusions 20A and second asterisk protrusions 20B. The first asterisk protrusion 20A and the second asterisk protrusion 20B are protrusions protruding from the base surface 22 at a height of 0.1 mm or more and 1.0 mm or less, and a plurality of each are formed at intervals of 0.1 mm or more and 1.0 mm or less. Has been done. By forming such a first asterisk protrusion 20A and a 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 contrasts with the outside of the inner black line 44. be able to. That is, since the rim line 42 in the sidewall portion 14 extends in the circumferential direction, the viewpoint is more likely to be directed to the outside in the tire radial direction than the rim portion when the tire is viewed from the outside of the vehicle. Therefore, the rim diameter can be made to feel large.

(Fourth Embodiment)
Next, the tire according to the fourth embodiment of the present invention will be described with reference to FIG. 7. The same components as those of the first embodiment described above will be assigned the same number and the 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 the inner character portion 52 as the central decorative portion.

That is, as shown in FIG. 7, the inner character portion 52 is formed in the sidewall portion 14. The inner character portion 52 has a strip-shaped arc shape. The inner character portion 52 is displayed with, for example, the characters "225 / 45R17 90W" displayed by the base surface 22, the plurality of first asterisk protrusions 20A, and the plurality of second asterisk protrusions 20B similar to the inner black line 44. There is.

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

(Action / effect of the fourth embodiment)
Next, the operation and effect of the fourth embodiment will be described.

Even with the above configuration, the same effect as that of the third embodiment can be obtained because the tire 40 is configured in the same manner as the tire 40 of the third embodiment except that the inner character portion 52 is provided on the sidewall portion 14. Further, the sidewall portion 14 is provided with an inner character portion 52 composed of a plurality of unit patterns. Therefore, the inner character portion 52 of the sidewall portion 14 can provide contrast with other than the inner character portion 52 and the inner black line 44. Further, in the inner character portion 52, since the portion inside the tire radial direction R is integrally formed with the inner black line 44, the inner character portion 52 and the inner black line 44 are formed when the tire 50 is viewed from the outside of the vehicle. You can play a sense of unity. 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 outer side in the tire radial direction from the rim portion, so that the rim diameter is made to feel larger. Can be done.

(Fifth Embodiment)
Next, the tire according to the fifth embodiment of the present invention will be described with reference to FIG. The same components as those of the first embodiment described above will be assigned the same number and the 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, and 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. It is characterized by being tired.

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. Further, the rim line 42 of the sidewall portion 14 is provided with an inner black line 44. That is, a pair of an outer black line 18 and an inner black line 44 are provided.

(Action / effect of the fifth embodiment)
Next, the operation and effect of the fifth embodiment will be described.

Even with 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 split position 16 and the inner black line 44 is provided at the rim line 42. Therefore, the same effect as that of the first embodiment can be obtained. Further, since the outer black line 18 and the inner black line 44 are provided on the sidewall portion 14, the portion outside the tire radial direction R is visually emphasized more than the rim portion, so that the rim diameter can be increased. You can make it feel big.

In addition, 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 fifth embodiment described above.

(Sixth Embodiment)
Next, the tire according to the sixth embodiment of the present invention will be described with reference to FIG. 9. The same components as those of the first embodiment described above will be assigned the same number and the description thereof will be omitted.

The tire 70 according to the sixth embodiment has the same basic configuration as 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. It is characterized by the fact that it is.

That is, as shown in FIG. 9, a gradation portion 62 is provided between the outer black line 18 and the inner black line 44 in the sidewall portion 14. In this gradation portion 62, a plurality of protrusions (not shown) having a protrusion height of 0.1 mm or more and 1.0 mm or less from a base surface (not shown) are formed, and the heights of the plurality of protrusions arranged adjacent to each other are gradually reduced. An area is provided. Specifically, the height of the protrusions provided on the intermediate portion G (hereinafter referred to as "site G") between the outer black line 18 and the inner black line 44 in the sidewall portion 14 is the outer black line 18 and The heights of the first asterisk protrusion 20A and the second asterisk protrusion 20B of the inner black line 44 are substantially the same. That is, the portion G looks as 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, the height of the protrusion is gradually reduced as the outer black line 18 is approached. That is, the blackness appears to decrease toward the outer black line 18 from the portion G. Similarly, between the portion G in the gradation portion 62 and the inner black line 44, the height of the protrusion is gradually reduced as the inner black line 44 is approached. That is, the blackness appears to decrease toward the inner black line 44 from the portion G.

(Action / effect of the sixth embodiment)
Next, the operation and effect of the sixth embodiment will be described.

The above configuration is also the same as that of the tire 50 of the fifth embodiment except that the gradation portion 62 is provided between the outer black line 18 and the inner black line 44. A similar effect 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 protrusion 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 gradual reduction region in which the heights of the plurality of protrusions to be formed gradually decrease. That is, since the height of the protrusions gradually decreases in the gradually decreasing region, the 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 protrusions and appears to be gradually brightened. .. That is, a gradation is added to the brightness in the gradually decreasing region, and the range of expression of the gradation portion 62 having the region where the protrusions are formed in the tire 60 can be expanded as compared with the case where the brightness is constant. Therefore, it is possible to further improve the appearance design while making the rim diameter feel larger by the outer decorative portion and the inner decorative portion.

In the present embodiment, the portion G in the gradation portion 62 looks black, and the height of the protrusion is gradually reduced as the portion G approaches the outer black line 18 and the inner black line 44. That is, the blackness appears to decrease from the portion G toward the outer black line 18 and the inner black line 44. As a result, the shape of the sidewall portion 14 looks like a concave shape. Generally, the sidewall portion 14 is formed to be convex toward the outside in the tire width direction, but if the convex feeling is strong, the impression that the flatness is high 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 convex feeling can be reduced and the appearance design can be improved.

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

Further, the above-mentioned gradation portion 62 is configured to look like a concave shape, but the present invention is not limited to this, and the gradual reduction region may be appropriately adjusted so as to look like another shape.

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 the first asterisk protrusion 20A and the second asterisk protrusion 20B. The configuration is not limited to this, and a configuration in which protrusions having other shapes are provided may be used.

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

Further, in the first asterisk protrusion 20A and the second asterisk protrusion 20B, the second extension portion 20AB-1 and the third extension portion 20BC-1 are each curved, but the present invention is not limited to this. It may be configured without.

Further, the unit pattern 20 is not limited to the first asterisk protrusion 20A and the second asterisk protrusion 20B, but is not limited to this, and is formed in, for example, a V shape when viewed from a direction orthogonal to the base surface 22. They may be connected to each other to form rib-shaped protrusions formed in a zigzag shape in the tire circumferential direction. As an example, a plurality of zigzag-shaped rib-shaped protrusions are formed in the tire radial direction at intervals P. The cross-sectional shape of the rib-shaped protrusions and the distance P between the center of one rib-shaped protrusion and the center of the other rib-shaped protrusion in the adjacent rib-shaped protrusions are the cross-sectional shapes and spacings of the first asterisk protrusion 20A and the second asterisk protrusion 20B. It may be the same as P. 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. Further, the rib-shaped protrusions do not have to be connected in a V-shape, and the linear elements of the rib-shaped protrusions may be arranged independently of each other. Further, the protrusion is not limited to the rib-shaped protrusion, and may be a protrusion having other shapes.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above, and it is possible to carry out various modifications other than the above within a range not deviating from the gist thereof. Of course.

10 ... tire, 12 ... tread part, 14 ... sidewall part, 16 ... mold split position, 18 ... outer black line (outer decorative 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)

The tread that makes up the tread of the tire and
The sidewall portion that constitutes the side surface of the tire and
It is arranged only on the outer side of the sidewall portion in the tire radial direction, and extends in a line shape in the tire circumferential direction at the mold split position which is the boundary between the tread portion and the sidewall portion or near the mold split position. In addition, an outer decorative portion provided with a unit pattern in which a plurality of protrusions protruding 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.
Tires with. The sidewalls that make up the sides of the tire and
It is arranged only inside the tire radial direction of the sidewall portion, extends in a line shape in the tire circumferential direction at the rim line near the rim portion of the applicable rim in the sidewall portion, and is 0.1 mm or more from the base surface. An inner decorative portion provided with a unit pattern in which a plurality of protrusions protruding at a height of 1.0 mm or less are formed at intervals of 0.1 mm or more and 1.0 mm or less.
Tires with. The sidewall portion is provided with an inner decorative portion having the plurality of unit patterns as well as extending in a line shape in the tire circumferential direction at a rim line formed near the rim flange of the applicable rim. ing,
The tire according to claim 1. The sidewall portion is provided with an outer character portion in which a portion on the outer side in the tire radial direction is integrally formed with the outer decorative portion and is formed by the plurality of unit patterns.
The tire according to claim 1 or 3. The sidewall portion is provided with an inner character portion in which a portion inside the tire radial direction is integrally formed with the inner decorative portion and is formed by the plurality of unit patterns.
The tire according to claim 4, which cites claim 2, claim 3 or claim 3. The tread that makes up the tread of the tire and
The sidewall portion that constitutes the side surface of the tire and
It extends in the tire circumferential direction at or near the mold split position, which is the boundary between the tread portion and the sidewall portion, and 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 protruding protrusions are formed at intervals of 0.1 mm or more and 1.0 mm or less, and
Have,
The sidewall portion is provided with an inner decorative portion having the plurality of unit patterns as well as extending in the tire circumferential direction at a rim line formed near the rim flange of the applicable rim.
A plurality of protrusions having a protrusion 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. A tire having a pattern region portion provided with a tapering region in which the height of the plurality of protrusions gradually decreases.

Images