WO2020137211A1 - Tire - Google Patents
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- WO2020137211A1 WO2020137211A1 PCT/JP2019/044374 JP2019044374W WO2020137211A1 WO 2020137211 A1 WO2020137211 A1 WO 2020137211A1 JP 2019044374 W JP2019044374 W JP 2019044374W WO 2020137211 A1 WO2020137211 A1 WO 2020137211A1
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- pattern
- tire
- ridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
Definitions
- the present invention relates to a tire.
- Patent Documents 1 and 2 Conventionally, a technique of forming a pattern region in which a pattern or the like is processed on the outer surface of a tire has been proposed (for example, Patent Documents 1 and 2).
- the present invention while suppressing the increase of air resistance during tire running and the occurrence of cracks on the outer surface of the tire, it is possible to obtain the contrast in the pattern region of the outer surface of the tire, it is an object to provide a tire To do.
- the gist of the present invention is as follows.
- the tire of the present invention is Formed on the outer surface of the tire, having a pattern region having a base portion,
- the pattern region may have a plurality of ridges protruding from the base portion at a height of more than 0.02 mm and less than 0.1 mm.
- the "height" of the ridge means the height measured from the base portion in a direction perpendicular to the base portion when the tire is mounted on the applicable rim, filled with the specified internal pressure, and no load is applied. I will say. “Applicable rim” is an industrial standard that is effective in regions where tires are produced and used. In Japan, JATMA (Japan Automotive Tire Association) JATMA YEAR BOOK and in Europe, ETRTO (The European Tire and Rim Technical Organization).
- the “specified internal pressure” refers to the air pressure (maximum air pressure) that corresponds to the maximum load capacity of a single wheel in the applicable size and ply rating described in JATMA, etc., and has a size not listed in the above industrial standards.
- the “specified internal pressure” means the air pressure (maximum air pressure) corresponding to the maximum load capacity specified for each vehicle in which the tire is mounted.
- the “maximum load capacity” described later means a load corresponding to the maximum load capacity.
- the present invention it is possible to provide a tire capable of obtaining a contrast in a pattern area on the outer surface of the tire while suppressing an increase in air resistance during tire running and generation of cracks on the outer surface of the tire.
- FIG. 3 is a plan view showing a pattern area on the outer surface of the tire according to the embodiment of the present invention.
- FIG. 3 is a partial plan view showing four unit patterns in the pattern area of FIG. 2. It is a top view which shows the pattern area
- the internal structure of the tire is the same as that of the conventional one. Therefore, although detailed description is omitted, as an example, a tire diameter of a carcass crown portion that has a pair of sidewall portions and a tread portion that are continuous with a pair of bead portions and that extends in a toroidal shape on the pair of bead portions.
- a structure having a reinforcing structure such as a belt on the outer side in the direction can be adopted.
- FIG. 1 is a view of a tire 1 according to an embodiment of the present invention viewed from a side surface side.
- the tire 1 according to the present embodiment has two mark portions 3 (the tire circumferences on the circumference of the tire 1 in the illustrated example, on the outer surface (sidewall portion 2 in the present embodiment) of the tire. 180° apart in the direction).
- the mark part 3 includes a pattern region (processed part in which a pattern is processed) 3a (details of the pattern region 3a are not shown in FIG. 1, but are shown in detail in FIGS. 2 and 3), In the illustrated example, it has a mark 3b made of the characters "ABCDEFGH".
- the character is composed of a smooth surface, but it may be composed of irregularities or the like formed by processing such as laser.
- the mark 3b may be formed of figures, symbols, etc. in addition to characters, and in this case also, the mark 3b may be formed of a smooth surface or a structure having irregularities or the like.
- the mark portion 3 does not have to have the mark 3b such as a character, and may be composed of only the pattern region 3a so that only the pattern region 3a can function as the mark.
- the mark portion 3 includes the tire maximum width position (position where the width in the tire width direction is maximum) when the tire 1 is mounted on the applicable rim, filled with the specified internal pressure, and put in an unloaded state.
- the sidewall portion 2 is formed over a tire radial direction region of 1/4 or more and 1 or less of the tire radial direction region.
- the “sidewall portion” here means a tire radial direction region from the tire radial outside end of the bead core to the ground contact end.
- the “ground contact end” refers to both outer ends in the tire width direction of the ground contact surface that come into contact with the road surface when the tire 1 is mounted on the applicable rim, the specified internal pressure is filled, and the maximum load is applied. ..
- FIG. 2 is a plan view showing the pattern region 3a on the outer surface of the tire 1 according to the embodiment of the present invention.
- the mark 3b made of the characters “ABCDEFGH” is omitted.
- FIG. 3 is a partial plan view showing four unit patterns 6 (6a, 6b, 6c, 6d) in the pattern region 3b of FIG.
- the pattern region 3a includes a base portion 4 forming a bottom surface and a plurality of protrusions protruding from the base portion 4 at a height of more than 0.02 mm and less than 0.1 mm.
- the ridge 5 has a trapezoidal shape in a sectional view perpendicular to the extending direction of the ridge 5, and in the illustrated example, the width of the top of the ridge 5 is 0.01 to 0. The width of the bottom of the ridge 5 is 0.02 to 0.04 mm, and the difference between the width of the top and the width of the bottom of the ridge 5 is about 0.01 mm.
- the width of the top and the width of the bottom of the ridge 5 are not limited to the above range. Further, in the illustrated example, the ridge 5 has a trapezoidal shape in a cross-sectional view, but may have another shape such as a rectangular shape or a triangular shape.
- the ridge 5 is projected from the base portion 4 at a height of more than 0.02 mm and less than 0.1 mm in any cross-sectional shape.
- the width of the ridge when the ridge 5 has a rectangular shape is not particularly limited, but may be, for example, 0.015 to 0.035 mm, and the width of the ridge when the ridge 5 has a triangular shape is Although not particularly limited, for example, it can be 0.02 to 0.04 mm.
- the ridges 5 as described above can be formed by laser processing, for example.
- the pattern region 3a is composed of repeating unit patterns 6 each having a fan shape in plan view.
- one unit pattern 6 projects from the base portion 4 and a height of more than 0.02 mm and less than 0.1 mm from the base portion 4, and has a center of each fan shape in a plan view.
- a plurality of ridges 5 extending radially from are densely arranged.
- the central angle of the fan shape in plan view is 90°, and 19 ridges 5 of the same extension length are provided so as to divide it into 20. That is, in this example, each sector is 1/4 of a circle in a plan view.
- the extension length of the ridge 5 is the same between the sectors.
- the distance between the adjacent ridges 5 is toward one direction of the extending direction of the ridges 5 (in this example, toward the center of the fan shape). ) It is gradually decreasing (continuously decreasing).
- one arc and two radial lines forming the outer peripheral edge of each fan shape in plan view are also the ridges 5. Then, as shown in FIGS. 2 and 3, one side of one unit pattern 6a that is fan-shaped in plan view and one side of the other unit patterns 6b and 6c that are fan-shaped in plan view have the centers of the fan-shaped ones.
- Another unit pattern 6d having the same direction as that of one unit pattern 6a is arranged such that its arc is in contact with the arcs of the other unit patterns 6b and 6c. Then, as shown in FIG. 2, the set of unit patterns 6a to 6d in the state shown in FIG. 3 is repeated so that the ridge 5 intersecting the center of each fan-shaped arc is inclined by 45° with respect to the tire radial direction.
- the pattern area 3a is formed by being arranged.
- the small (dense) space between adjacent ridges 5 extends in a zigzag shape in a direction inclined in the tire radial direction.
- the dark-appearing portion while the dark-appearing portion is located in a straight line, the dark-appearing portion in a substantially triangular shape in a plan view is a unit pattern 6 that is adjacent in the tire radial direction with respect to the straight line. And are formed so as to be alternately opposite.
- the function and effect of the tire 1 of this embodiment will be described.
- the pattern region 3a has the plurality of protrusions 5 protruding from the base portion 4 at a height of more than 0.02 mm. It is possible to obtain contrast (shading) by reflection of. In particular, in the present embodiment, since the distance between the adjacent ridges 5 of the plurality of ridges 5 gradually decreases in one direction of the extending direction of the ridges 5, the distance between the adjacent ridges 5 is small. It is possible to obtain a contrast in which sparseness occurs in the distance, a dense part looks dark, and a sparse part looks bright.
- the fan-shaped unit patterns 6 are repeatedly arranged in a plan view in the pattern area 3a as described above, the unit patterns 6 are densely arranged and many ( Contrast can be obtained at (regularly located) locations. Furthermore, in the present embodiment, since the interval between the adjacent ridges 5 is small (dense portion), the ridges 5 extend in the zigzag shape in the direction inclined in the tire radial direction, so that the contrast can be obtained even between the unit patterns 6. .. Further, since the plurality of ridges 5 project at a height of less than 0.1 mm, the air resistance during running of the tire is increased and cracks on the outer surface of the tire (sidewall portion 2 in the present embodiment) are generated.
- Occurrence can also be suppressed.
- the tire 1 of the present embodiment it is possible to obtain the contrast in the pattern area on the outer surface of the tire while suppressing an increase in air resistance during tire running and the occurrence of cracks on the outer surface of the tire.
- the plurality of ridges 5 preferably protrude from the base portion 4 at a height of 0.03 mm or more and less than 0.1 mm. This is because the contrast effect can be further obtained by setting the height of the plurality of ridges 5 to 0.03 mm or more. For the same reason, it is more preferable that the plurality of ridges 5 protrude from the base portion 4 at a height of 0.04 mm or more and less than 0.1 mm, and the plurality of ridges 5 are 0.05 mm from the base portion 4. More preferably, the protrusion is formed at a height of not less than 0.1 mm.
- the height of the base portion 4 exceeds 0.02 mm and 0.08 mm or less.
- the height of the plurality of ridges 5 it is possible to further suppress the increase of air resistance during tire running and the generation of cracks on the outer surface of the tire.
- the plurality of ridges 5 project from the base portion 4 at a height of more than 0.02 mm and 0.07 mm or less, and the plurality of ridges 5 are 0.02 mm from the base portion 4.
- the protrusion is formed at a height of more than 0.06 mm.
- the height and the width are constant between the plurality of ridges 5. This is because the above-mentioned contrast can be made conspicuous by eliminating the contrast that can occur due to the difference in height and width.
- the central angle of the fan-shaped unit pattern 6 is 90° in plan view, but the central angle is not particularly limited to this.
- the central angle of the fan-shaped unit patterns 6 in plan view is preferably 80° to 100°, as in the above example. Most preferably, it is 90°.
- the central angle of the fan-shaped unit pattern 6 is 90° in plan view, and 19 ridges 5 are arranged excluding the outer peripheral edge of the fan, but the number of ridges 5 is not particularly limited. Instead, for example, the number can be 10 to 25. The number of ridges 5 can be appropriately increased or decreased according to the size of the central angle.
- FIG. 4 is a plan view showing a pattern area on the outer surface of a tire according to another embodiment of the present invention.
- the pattern area 3a areas adjacent to the outside of the pattern area 3a are referred to as end areas 7 (7a to 7d), and an area surrounded by the end areas 7 is referred to as a central area 8.
- the protruding height of at least a part of the ridges 5 in the end region 7 is lower than the protruding height of the ridges in the central region 8.
- the protrusion height of the protrusion 5 is equal to that of the protrusion of the central region 8. It is lower than the projecting height, and the projecting height of the ridge 5 in the end regions 7a and 7b gradually decreases (continuously decreases) from the central region 8 side toward the outside of the pattern region.
- the pattern area since the protruding height of at least a part of the ridges 5 in the end area 7 is lower than the protruding height of the ridges in the central area 8, the pattern area The contrast gradually disappears from 3a to the outside of the pattern area 3a.
- the projecting height of at least a part of the ridges 5 of the end region 7 gradually decreases from the central region 8 side toward the outside of the pattern region. The contrast disappears in a gradation pattern to the outside of 3a.
- the protruding height of the ridge 5 is although it is lower than the protruding height of the ridge, the protruding height of the ridge 5 is made lower than the protruding height of the ridge of the central area 8 in only one of the end regions 7a and 7b (for example, , Gradually decreasing from the central region 8 side toward the outside of the pattern region).
- the protrusion height of the protrusion 5 is set to the protrusion height of the center region 8.
- the height may be lower or higher than the protruding height, or may be the same as the protruding height of the ridge in the central region 8.
- the protruding height of the ridge 5 is set to be lower than the protruding height of the ridge in the central region 8 (for example, from the central region 8 side to the outside of the pattern region). Can be gradually reduced).
- the protruding height of the ridges 5 can be set lower or higher than the protruding height of the ridges in the central region 8, or the protruding height of the central region 8 can be increased.
- the height may be the same as the protruding height of the ridge.
- the heights and the widths of the plurality of ridges 5 are constant. This is because the above-mentioned contrast can be made conspicuous by eliminating the contrast that can occur due to the difference in height and width. Further, in the end region 7, it is preferable that the widths of the plurality of ridges 5 are constant.
- the width in the tire radial direction of the end regions 7a and/or 7b that lowers the protruding height of the ridges 5 as described above is not particularly limited, but while maintaining the area of the central region 8, the contrast From the viewpoint of obtaining visual sense as well, the width is preferably 3 to 20% of the width of the pattern region 3a in the tire radial direction. Similarly, the width of the end regions 7c and/or 7d in the tire circumferential direction is preferably 3 to 20% of the width of the entire pattern region 3a in the tire circumferential direction.
- the pattern region has a unit pattern in which a plurality of convex stripes are densely arranged, and the unit pattern is a sum Ls of extension lengths of a plurality of convex stripes included in the unit pattern and the entire unit pattern.
- the ratio Ls/S to the area S is preferably 1.5 to 5.5 (mm/mm 2 ).
- the ratio Ls/S is 1.5 (mm/mm 2 ). 2 )
- the ratio Ls/S is more preferably 2.5 to 4.5 (mm/mm 2 ).
- the number of ridges is 3 to 21 (lines/mm 2 ) with respect to the entire area S of the unit pattern.
- the number to be 3 (lines/mm 2 ) or more it is possible to effectively form a dense portion in the unit pattern, while, by setting the number to be 21 (lines/mm 2 ) or less, the dense area in the entire unit pattern can be formed. The area of the place can be prevented from becoming too large. Thereby, the contrast can be obtained more effectively.
- the number of ridges with respect to the entire area S of the unit pattern is 9 to 15 (lines/mm 2 ).
- the distance between the adjacent ridges gradually decreases in one direction of the extending direction of the ridges. This is because sparseness and denseness are formed in the distance between the adjacent ridges, so that it is possible to obtain a gradation effect in which dense areas are dark and sparse areas are bright. Thereby, the contrast can be obtained more effectively.
- the extension length of the ridge in the unit pattern is preferably 250 to 350 mm.
- the extension length L of the ridge is more preferably 275 to 325 mm.
- the pattern region is composed of repeating unit patterns that are fan-shaped in plan view. This is because the unit patterns can be arranged densely and contrast can be obtained in many places in the entire pattern region.
- the unit patterns can be arranged densely and contrast can be obtained in many places in the entire pattern region.
- by forming a plurality of convex stripes 5 radially extending from the center of the fan shape in the fan-shaped unit pattern 6 in a plan view it is more effective to form a sparse and dense pattern in order to obtain a contrast effect. preferable.
- the protrusion height of at least part of the ridge of the end area is defined. Is preferably lower than the protruding height of the ridge in the central region. This is because the contrast can be gradually lost from the pattern area to the outside of the pattern area.
- the protrusion height of at least a part of the ridges in the end region gradually decreases from the central region side toward the outside of the pattern region. This is because it is possible to make the contrast disappear like a gradation from the pattern area to the outside of the pattern area.
- the mark portions 3 are formed on the outer surface of the tire 1 at two locations on the circumference, which are 180° apart from each other in the tire circumferential direction. It may be formed at one or more locations on the outer circumference.
- the displayed mark (character) 3b is the same in both places, but it can be different.
- the mark part It is preferable to provide 3 in two or more places.
- the mark part 3 can be provided at two or more places or at one place.
- the pattern region 3a may be provided over the entire circumference of the outer surface of the tire 1.
- the unit pattern 6 has a fan shape in a plan view, but may have various shapes such as a triangular shape, a rectangular shape, a circular shape, and an elliptical shape in a plan view.
- a triangular shape a rectangular shape
- a circular shape a circular shape
- an elliptical shape in a plan view.
- by arranging the ridges 5 radially for example, sparseness and denseness can be formed and contrast can be obtained.
- tire 2 sidewall part 3: mark part, 3a: pattern region, 3b: mark 4: base part 5: ridges 6, 6a, 6b, 6c, 6d: unit patterns 7, 7a, 7b, 7c , 7d: edge area 8: central area
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Abstract
This tire includes a pattern region that is formed on the outer surface of the tire and that has a base section. The pattern region includes a plurality of ridges that protrude from the base section to a height of greater than 0.02 mm but less than 0.1mm.
Description
本発明は、タイヤに関するものである。
The present invention relates to a tire.
従来、タイヤの外面に、模様等が加工されたパターン領域を形成する技術が提案されている(例えば、特許文献1、2)。
Conventionally, a technique of forming a pattern region in which a pattern or the like is processed on the outer surface of a tire has been proposed (for example, Patent Documents 1 and 2).
このような技術では、パターン領域における濃淡のコントラストを得ることが望まれる場合がある。また、加工されたパターンによるタイヤ走行時の空気抵抗の増大やタイヤの外面におけるクラックの発生を抑制することも望まれる。
With such technology, it may be desired to obtain contrast of light and shade in the pattern area. In addition, it is also desired to suppress an increase in air resistance during running of the tire due to the processed pattern and generation of cracks on the outer surface of the tire.
そこで、本発明は、タイヤ走行時の空気抵抗の増大やタイヤの外面におけるクラックの発生を抑制しつつも、タイヤの外面のパターン領域におけるコントラストを得ることができる、タイヤを提供することを目的とする。
Therefore, the present invention, while suppressing the increase of air resistance during tire running and the occurrence of cracks on the outer surface of the tire, it is possible to obtain the contrast in the pattern region of the outer surface of the tire, it is an object to provide a tire To do.
本発明の要旨構成は、以下の通りである。
本発明のタイヤは、
タイヤの外面に形成され、ベース部を有するパターン領域を有し、
前記パターン領域は、前記ベース部から0.02mm超0.1mm未満の高さで突出した複数の凸条を有することを特徴とする。 The gist of the present invention is as follows.
The tire of the present invention is
Formed on the outer surface of the tire, having a pattern region having a base portion,
The pattern region may have a plurality of ridges protruding from the base portion at a height of more than 0.02 mm and less than 0.1 mm.
本発明のタイヤは、
タイヤの外面に形成され、ベース部を有するパターン領域を有し、
前記パターン領域は、前記ベース部から0.02mm超0.1mm未満の高さで突出した複数の凸条を有することを特徴とする。 The gist of the present invention is as follows.
The tire of the present invention is
Formed on the outer surface of the tire, having a pattern region having a base portion,
The pattern region may have a plurality of ridges protruding from the base portion at a height of more than 0.02 mm and less than 0.1 mm.
ここで、凸条の「高さ」とは、タイヤを適用リムに装着し、規定内圧を充填し、無負荷とした際に、ベース部から該ベース部に垂直な方向に計測した高さをいうものとする。
「適用リム」とは、タイヤが生産され、使用される地域に有効な産業規格であって、日本ではJATMA(日本自動車タイヤ協会)のJATMA YEAR BOOK、欧州ではETRTO(The European Tyre and Rim Technical Organisation)のSTANDARDS MANUAL、米国ではTRA(The Tire and Rim Association,Inc.)のYEAR BOOK等に記載されているまたは将来的に記載される、適用サイズにおける標準リム(ETRTOのSTANDARDS MANUALではMeasuring Rim、TRAのYEAR BOOKではDesign Rim)を指す(即ち、上記の「適用リム」には、現行サイズに加えて将来的に上記産業規格に含まれ得るサイズも含む。「将来的に記載されるサイズ」の例としては、ETRTO 2013年度版において「FUTURE DEVELOPMENTS」として記載されているサイズを挙げることができる。)が、上記産業規格に記載のないサイズの場合は、タイヤのビード幅に対応した幅のリムをいう。
また、「規定内圧」とは、上記JATMA等に記載されている、適用サイズ・プライレーティングにおける単輪の最大負荷能力に対応する空気圧(最高空気圧)を指し、上記産業規格に記載のないサイズの場合は、「規定内圧」は、タイヤを装着する車両毎に規定される最大負荷能力に対応する空気圧(最高空気圧)をいうものとする。また、後述の「最大負荷荷重」とは、上記最大負荷能力に対応する荷重をいうものとする。 Here, the "height" of the ridge means the height measured from the base portion in a direction perpendicular to the base portion when the tire is mounted on the applicable rim, filled with the specified internal pressure, and no load is applied. I will say.
“Applicable rim” is an industrial standard that is effective in regions where tires are produced and used. In Japan, JATMA (Japan Automotive Tire Association) JATMA YEAR BOOK and in Europe, ETRTO (The European Tire and Rim Technical Organization). ) STANDARDS MANUAL, TRA in the US (The Tire and Rim Association, Inc.) YEAR BOOK, etc., or described in the future, standard rims in application size (ETTRTO STANDARDS MANUAL, Measuring Rim, TRA Design Rim) in the YEAR BOOK of (i.e., the above-mentioned "applicable rim" includes a size that may be included in the industry standard in the future in addition to the current size. As an example, the size described as “FUTURE DEVELOPMENTS” in the ETRTO 2013 edition can be mentioned.) However, in the case of a size not listed in the above industrial standard, a rim having a width corresponding to the bead width of the tire is used. Say.
The "specified internal pressure" refers to the air pressure (maximum air pressure) that corresponds to the maximum load capacity of a single wheel in the applicable size and ply rating described in JATMA, etc., and has a size not listed in the above industrial standards. In this case, the “specified internal pressure” means the air pressure (maximum air pressure) corresponding to the maximum load capacity specified for each vehicle in which the tire is mounted. Further, the “maximum load capacity” described later means a load corresponding to the maximum load capacity.
「適用リム」とは、タイヤが生産され、使用される地域に有効な産業規格であって、日本ではJATMA(日本自動車タイヤ協会)のJATMA YEAR BOOK、欧州ではETRTO(The European Tyre and Rim Technical Organisation)のSTANDARDS MANUAL、米国ではTRA(The Tire and Rim Association,Inc.)のYEAR BOOK等に記載されているまたは将来的に記載される、適用サイズにおける標準リム(ETRTOのSTANDARDS MANUALではMeasuring Rim、TRAのYEAR BOOKではDesign Rim)を指す(即ち、上記の「適用リム」には、現行サイズに加えて将来的に上記産業規格に含まれ得るサイズも含む。「将来的に記載されるサイズ」の例としては、ETRTO 2013年度版において「FUTURE DEVELOPMENTS」として記載されているサイズを挙げることができる。)が、上記産業規格に記載のないサイズの場合は、タイヤのビード幅に対応した幅のリムをいう。
また、「規定内圧」とは、上記JATMA等に記載されている、適用サイズ・プライレーティングにおける単輪の最大負荷能力に対応する空気圧(最高空気圧)を指し、上記産業規格に記載のないサイズの場合は、「規定内圧」は、タイヤを装着する車両毎に規定される最大負荷能力に対応する空気圧(最高空気圧)をいうものとする。また、後述の「最大負荷荷重」とは、上記最大負荷能力に対応する荷重をいうものとする。 Here, the "height" of the ridge means the height measured from the base portion in a direction perpendicular to the base portion when the tire is mounted on the applicable rim, filled with the specified internal pressure, and no load is applied. I will say.
“Applicable rim” is an industrial standard that is effective in regions where tires are produced and used. In Japan, JATMA (Japan Automotive Tire Association) JATMA YEAR BOOK and in Europe, ETRTO (The European Tire and Rim Technical Organization). ) STANDARDS MANUAL, TRA in the US (The Tire and Rim Association, Inc.) YEAR BOOK, etc., or described in the future, standard rims in application size (ETTRTO STANDARDS MANUAL, Measuring Rim, TRA Design Rim) in the YEAR BOOK of (i.e., the above-mentioned "applicable rim" includes a size that may be included in the industry standard in the future in addition to the current size. As an example, the size described as “FUTURE DEVELOPMENTS” in the ETRTO 2013 edition can be mentioned.) However, in the case of a size not listed in the above industrial standard, a rim having a width corresponding to the bead width of the tire is used. Say.
The "specified internal pressure" refers to the air pressure (maximum air pressure) that corresponds to the maximum load capacity of a single wheel in the applicable size and ply rating described in JATMA, etc., and has a size not listed in the above industrial standards. In this case, the “specified internal pressure” means the air pressure (maximum air pressure) corresponding to the maximum load capacity specified for each vehicle in which the tire is mounted. Further, the “maximum load capacity” described later means a load corresponding to the maximum load capacity.
本発明によれば、タイヤ走行時の空気抵抗の増大やタイヤ外面におけるクラックの発生を抑制しつつ、タイヤの外面のパターン領域におけるコントラストを得ることができる、タイヤを提供することができる。
According to the present invention, it is possible to provide a tire capable of obtaining a contrast in a pattern area on the outer surface of the tire while suppressing an increase in air resistance during tire running and generation of cracks on the outer surface of the tire.
以下、本発明の実施形態について、図面を参照して詳細に例示説明する。なお、タイヤの内部構造等については、従来のそれと同様である。従って、詳細な説明は省略するが、一例としては、一対のビード部に連なる一対のサイドウォール部とトレッド部とを有し、該一対のビード部にトロイダル状に跨るカーカスのクラウン部のタイヤ径方向外側にベルト等の補強構造を有する構成とすることができる。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The internal structure of the tire is the same as that of the conventional one. Therefore, although detailed description is omitted, as an example, a tire diameter of a carcass crown portion that has a pair of sidewall portions and a tread portion that are continuous with a pair of bead portions and that extends in a toroidal shape on the pair of bead portions. A structure having a reinforcing structure such as a belt on the outer side in the direction can be adopted.
図1は、本発明の一実施形態にかかるタイヤ1を側面側から見た図である。図1に示すように、本実施形態のタイヤ1は、タイヤの外面(本実施形態ではサイドウォール部2)に、図示例で2つの標章部3が(タイヤ1の周上で互いにタイヤ周方向に180°離れて)形成されている。標章部3は、パターン領域(パターンが加工された加工部)3a(図1においては、パターン領域3aの詳細は図示されておらず、図2、図3で詳細に示している)と、図示例で「ABCDEFGH」との文字からなる標章3bとを有している。この例では、文字は、平滑面で構成されているが、レーザー等の加工によって形成された凹凸等を有する構成とすることもできる。また、標章3bは、文字の他、図形や記号等で構成することもでき、この場合も平滑面で構成したり、凹凸等を有する構成としたりすることができる。なお、標章部3は、文字等の標章3bを有していなくても良く、パターン領域3aのみから構成して、パターン領域3aのみに標章としての機能を発揮させることもできる。
なお、標章部3は、タイヤ1を適用リムに装着し、規定内圧を充填し、無負荷状態とした際に、タイヤ最大幅位置(タイヤ幅方向の幅が最大となる位置)を含む、サイドウォール部2のタイヤ径方向領域の1/4以上1以下のタイヤ径方向領域にわたって形成されていることが好ましい。ここでいう「サイドウォール部」とは、ビードコアのタイヤ径方向外側端から接地端までのタイヤ径方向領域をいうものとする。また、「接地端」とは、タイヤ1を適用リムに装着し、規定内圧を充填し、最大負荷荷重を負荷した際に、路面と接することとなる接地面のタイヤ幅方向両外側端をいう。 FIG. 1 is a view of a tire 1 according to an embodiment of the present invention viewed from a side surface side. As shown in FIG. 1, the tire 1 according to the present embodiment has two mark portions 3 (the tire circumferences on the circumference of the tire 1 in the illustrated example, on the outer surface (sidewall portion 2 in the present embodiment) of the tire. 180° apart in the direction). The mark part 3 includes a pattern region (processed part in which a pattern is processed) 3a (details of the pattern region 3a are not shown in FIG. 1, but are shown in detail in FIGS. 2 and 3), In the illustrated example, it has a mark 3b made of the characters "ABCDEFGH". In this example, the character is composed of a smooth surface, but it may be composed of irregularities or the like formed by processing such as laser. Further, the mark 3b may be formed of figures, symbols, etc. in addition to characters, and in this case also, the mark 3b may be formed of a smooth surface or a structure having irregularities or the like. The mark portion 3 does not have to have the mark 3b such as a character, and may be composed of only the pattern region 3a so that only the pattern region 3a can function as the mark.
Themark portion 3 includes the tire maximum width position (position where the width in the tire width direction is maximum) when the tire 1 is mounted on the applicable rim, filled with the specified internal pressure, and put in an unloaded state. It is preferable that the sidewall portion 2 is formed over a tire radial direction region of 1/4 or more and 1 or less of the tire radial direction region. The "sidewall portion" here means a tire radial direction region from the tire radial outside end of the bead core to the ground contact end. Further, the "ground contact end" refers to both outer ends in the tire width direction of the ground contact surface that come into contact with the road surface when the tire 1 is mounted on the applicable rim, the specified internal pressure is filled, and the maximum load is applied. ..
なお、標章部3は、タイヤ1を適用リムに装着し、規定内圧を充填し、無負荷状態とした際に、タイヤ最大幅位置(タイヤ幅方向の幅が最大となる位置)を含む、サイドウォール部2のタイヤ径方向領域の1/4以上1以下のタイヤ径方向領域にわたって形成されていることが好ましい。ここでいう「サイドウォール部」とは、ビードコアのタイヤ径方向外側端から接地端までのタイヤ径方向領域をいうものとする。また、「接地端」とは、タイヤ1を適用リムに装着し、規定内圧を充填し、最大負荷荷重を負荷した際に、路面と接することとなる接地面のタイヤ幅方向両外側端をいう。 FIG. 1 is a view of a tire 1 according to an embodiment of the present invention viewed from a side surface side. As shown in FIG. 1, the tire 1 according to the present embodiment has two mark portions 3 (the tire circumferences on the circumference of the tire 1 in the illustrated example, on the outer surface (
The
図2は、本発明の一実施形態にかかるタイヤ1の外面のパターン領域3aを示す平面図である。図2においては、説明の便宜上、「ABCDEFGH」との文字からなる標章3bは、省略している。図3は、図2のパターン領域3bのうち、4つの単位パターン6(6a、6b、6c、6d)を示す部分平面図である。
FIG. 2 is a plan view showing the pattern region 3a on the outer surface of the tire 1 according to the embodiment of the present invention. In FIG. 2, for the sake of convenience of explanation, the mark 3b made of the characters “ABCDEFGH” is omitted. FIG. 3 is a partial plan view showing four unit patterns 6 (6a, 6b, 6c, 6d) in the pattern region 3b of FIG.
図2、図3に示すように、本実施形態において、パターン領域3aは、底面を形成するベース部4と、ベース部4から0.02mm超0.1mm未満の高さで突出した複数の凸条(細長く平面方向に延びる凸部)5と、を有している。図示例では、凸条5は、当該凸条5の延在方向に垂直な断面視で台形状の形状をなしており、図示例では、凸条5の頂部の幅は、0.01~0.03mmであり、上記凸条5の底部の幅は、0.02~0.04mmであり、凸条5の頂部の幅と底部の幅との差は、0.01mm程度である。なお、凸条5の頂部の幅及び底部の幅は、上記の範囲に限定されない。
また、図示例では、凸条5は、断面視で台形状であるが、矩形状、三角形状等、他の形状とすることもできる。凸条5は、いずれの断面形状である場合も、ベース部4から0.02mm超0.1mm未満の高さで突出したものである。凸条5が矩形状の場合の凸条の幅は、特に限定されないが、例えば、0.015~0.035mmとすることができ、凸条5が三角形状の場合の凸条の幅は、特に限定されないが、例えば、0.02~0.04mmとすることができる。
上記のような凸条5は、例えば、レーザー加工により形成することができる。 As shown in FIGS. 2 and 3, in the present embodiment, thepattern region 3a includes a base portion 4 forming a bottom surface and a plurality of protrusions protruding from the base portion 4 at a height of more than 0.02 mm and less than 0.1 mm. Strips (elongated protrusions extending in the planar direction) 5. In the illustrated example, the ridge 5 has a trapezoidal shape in a sectional view perpendicular to the extending direction of the ridge 5, and in the illustrated example, the width of the top of the ridge 5 is 0.01 to 0. The width of the bottom of the ridge 5 is 0.02 to 0.04 mm, and the difference between the width of the top and the width of the bottom of the ridge 5 is about 0.01 mm. The width of the top and the width of the bottom of the ridge 5 are not limited to the above range.
Further, in the illustrated example, theridge 5 has a trapezoidal shape in a cross-sectional view, but may have another shape such as a rectangular shape or a triangular shape. The ridge 5 is projected from the base portion 4 at a height of more than 0.02 mm and less than 0.1 mm in any cross-sectional shape. The width of the ridge when the ridge 5 has a rectangular shape is not particularly limited, but may be, for example, 0.015 to 0.035 mm, and the width of the ridge when the ridge 5 has a triangular shape is Although not particularly limited, for example, it can be 0.02 to 0.04 mm.
Theridges 5 as described above can be formed by laser processing, for example.
また、図示例では、凸条5は、断面視で台形状であるが、矩形状、三角形状等、他の形状とすることもできる。凸条5は、いずれの断面形状である場合も、ベース部4から0.02mm超0.1mm未満の高さで突出したものである。凸条5が矩形状の場合の凸条の幅は、特に限定されないが、例えば、0.015~0.035mmとすることができ、凸条5が三角形状の場合の凸条の幅は、特に限定されないが、例えば、0.02~0.04mmとすることができる。
上記のような凸条5は、例えば、レーザー加工により形成することができる。 As shown in FIGS. 2 and 3, in the present embodiment, the
Further, in the illustrated example, the
The
図2に示すように、本実施形態では、パターン領域3aは、平面視で扇形の単位パターン6の繰り返しからなっている。具体的には、図3に示すように、1つの単位パターン6は、ベース部4と、該ベース部4から0.02mm超0.1mm未満の高さで突出し、平面視で各扇形の中心から放射状に延びる複数の凸条5が密集配置されている。図3に示すように、この例では、平面視で扇形の中心角は90°であり、それを20分割するように、同一延在長さの19本の凸条5が設けられている。すなわち、本例では、各扇形は、平面視で円の1/4である。本例では、凸条5の延在長さは、各扇形間でも同一とされている。図2、図3に示すように、複数の凸条5は、隣り合う凸条5間の距離が、凸条5の延在方向の一方向に向かって(この例では扇形の中心に向かって)漸減(連続的に減少)している。なお、本例では、平面視で、各扇形の外周縁をなす、1つの弧及び2つの径線も、凸条5とされている。
そして、図2、図3に示すように、平面視で扇形である1つの単位パターン6aの一辺と、平面視で扇形である他の単位パターン6b、6cの一辺とが、扇形の中心同士が離間するように互いに180°回転させた状態で合わせられている。また、1つの単位パターン6aと同じ向きの他の単位パターン6dが、その孤が、上記他の単位パターン6b、6cの孤と接するように配置されている。そして、図3に示した状態の単位パターン6a~6dの組を、図2に示すように、各扇形の孤の中央と交わる凸条5がタイヤ径方向に対して45°傾斜するように繰り返し配置して、パターン領域3aが形成されている。図示例では、隣り合う凸条5の間隔が小さい(密な)箇所が、タイヤ径方向に傾斜した方向にジグザグ状に延びている。具体的には、暗めに見える箇所が直線状に位置しつつも、平面視略三角形状の暗く見える箇所が、その直線を基準として、上記タイヤ径方向に傾斜した方向に隣り合う単位パターン6ごとに、交互に逆向きになるように形成されている。
以下、本実施形態のタイヤ1の作用効果について説明する。 As shown in FIG. 2, in the present embodiment, thepattern region 3a is composed of repeating unit patterns 6 each having a fan shape in plan view. Specifically, as shown in FIG. 3, one unit pattern 6 projects from the base portion 4 and a height of more than 0.02 mm and less than 0.1 mm from the base portion 4, and has a center of each fan shape in a plan view. A plurality of ridges 5 extending radially from are densely arranged. As shown in FIG. 3, in this example, the central angle of the fan shape in plan view is 90°, and 19 ridges 5 of the same extension length are provided so as to divide it into 20. That is, in this example, each sector is 1/4 of a circle in a plan view. In this example, the extension length of the ridge 5 is the same between the sectors. As shown in FIG. 2 and FIG. 3, in the plurality of ridges 5, the distance between the adjacent ridges 5 is toward one direction of the extending direction of the ridges 5 (in this example, toward the center of the fan shape). ) It is gradually decreasing (continuously decreasing). In addition, in this example, one arc and two radial lines forming the outer peripheral edge of each fan shape in plan view are also the ridges 5.
Then, as shown in FIGS. 2 and 3, one side of one unit pattern 6a that is fan-shaped in plan view and one side of theother unit patterns 6b and 6c that are fan-shaped in plan view have the centers of the fan-shaped ones. They are rotated 180° apart from each other and are fitted together. Further, another unit pattern 6d having the same direction as that of one unit pattern 6a is arranged such that its arc is in contact with the arcs of the other unit patterns 6b and 6c. Then, as shown in FIG. 2, the set of unit patterns 6a to 6d in the state shown in FIG. 3 is repeated so that the ridge 5 intersecting the center of each fan-shaped arc is inclined by 45° with respect to the tire radial direction. The pattern area 3a is formed by being arranged. In the illustrated example, the small (dense) space between adjacent ridges 5 extends in a zigzag shape in a direction inclined in the tire radial direction. Specifically, while the dark-appearing portion is located in a straight line, the dark-appearing portion in a substantially triangular shape in a plan view is a unit pattern 6 that is adjacent in the tire radial direction with respect to the straight line. And are formed so as to be alternately opposite.
Hereinafter, the function and effect of the tire 1 of this embodiment will be described.
そして、図2、図3に示すように、平面視で扇形である1つの単位パターン6aの一辺と、平面視で扇形である他の単位パターン6b、6cの一辺とが、扇形の中心同士が離間するように互いに180°回転させた状態で合わせられている。また、1つの単位パターン6aと同じ向きの他の単位パターン6dが、その孤が、上記他の単位パターン6b、6cの孤と接するように配置されている。そして、図3に示した状態の単位パターン6a~6dの組を、図2に示すように、各扇形の孤の中央と交わる凸条5がタイヤ径方向に対して45°傾斜するように繰り返し配置して、パターン領域3aが形成されている。図示例では、隣り合う凸条5の間隔が小さい(密な)箇所が、タイヤ径方向に傾斜した方向にジグザグ状に延びている。具体的には、暗めに見える箇所が直線状に位置しつつも、平面視略三角形状の暗く見える箇所が、その直線を基準として、上記タイヤ径方向に傾斜した方向に隣り合う単位パターン6ごとに、交互に逆向きになるように形成されている。
以下、本実施形態のタイヤ1の作用効果について説明する。 As shown in FIG. 2, in the present embodiment, the
Then, as shown in FIGS. 2 and 3, one side of one unit pattern 6a that is fan-shaped in plan view and one side of the
Hereinafter, the function and effect of the tire 1 of this embodiment will be described.
本実施形態のタイヤ1によれば、パターン領域3aは、ベース部4から0.02mm超の高さで突出した複数の凸条5を有しているため、ベース部4及び凸条5における光の反射により、コントラスト(濃淡)を得ることができる。特に、本実施形態では、複数の凸条5は、隣り合う凸条5間の距離が、凸条5の延在方向の一方向に向かって漸減しているため、隣り合う凸条5間の距離に疎密が生じ、密な箇所が暗く見えて、疎な箇所が明るく見えるというコントラストを得ることができる。そして、本実施形態では、パターン領域3aは、平面視で扇形の単位パターン6を上記のように繰り返し配置しているため、単位パターン6を密に配置して、パターン領域3a全体の多くの(規則的に位置した)箇所でコントラストを得ることができる。さらに、本実施形態では、隣り合う凸条5の間隔が小さい(密な箇所)が、タイヤ径方向に傾斜した方向にジグザグ状に延びているため、単位パターン6間でもコントラストを得ることができる。
そして、上記複数の凸条5は、0.1mm未満の高さで突出したものであるため、タイヤ走行時の空気抵抗の増大やタイヤ外面(本実施形態では、サイドウォール部2)におけるクラックの発生を抑制することもできる。
以上のように、本実施形態のタイヤ1によれば、タイヤ走行時の空気抵抗の増大やタイヤ外面におけるクラックの発生を抑制しつつ、タイヤの外面のパターン領域におけるコントラストを得ることができる。 According to the tire 1 of the present embodiment, thepattern region 3a has the plurality of protrusions 5 protruding from the base portion 4 at a height of more than 0.02 mm. It is possible to obtain contrast (shading) by reflection of. In particular, in the present embodiment, since the distance between the adjacent ridges 5 of the plurality of ridges 5 gradually decreases in one direction of the extending direction of the ridges 5, the distance between the adjacent ridges 5 is small. It is possible to obtain a contrast in which sparseness occurs in the distance, a dense part looks dark, and a sparse part looks bright. In the present embodiment, since the fan-shaped unit patterns 6 are repeatedly arranged in a plan view in the pattern area 3a as described above, the unit patterns 6 are densely arranged and many ( Contrast can be obtained at (regularly located) locations. Furthermore, in the present embodiment, since the interval between the adjacent ridges 5 is small (dense portion), the ridges 5 extend in the zigzag shape in the direction inclined in the tire radial direction, so that the contrast can be obtained even between the unit patterns 6. ..
Further, since the plurality ofridges 5 project at a height of less than 0.1 mm, the air resistance during running of the tire is increased and cracks on the outer surface of the tire (sidewall portion 2 in the present embodiment) are generated. Occurrence can also be suppressed.
As described above, according to the tire 1 of the present embodiment, it is possible to obtain the contrast in the pattern area on the outer surface of the tire while suppressing an increase in air resistance during tire running and the occurrence of cracks on the outer surface of the tire.
そして、上記複数の凸条5は、0.1mm未満の高さで突出したものであるため、タイヤ走行時の空気抵抗の増大やタイヤ外面(本実施形態では、サイドウォール部2)におけるクラックの発生を抑制することもできる。
以上のように、本実施形態のタイヤ1によれば、タイヤ走行時の空気抵抗の増大やタイヤ外面におけるクラックの発生を抑制しつつ、タイヤの外面のパターン領域におけるコントラストを得ることができる。 According to the tire 1 of the present embodiment, the
Further, since the plurality of
As described above, according to the tire 1 of the present embodiment, it is possible to obtain the contrast in the pattern area on the outer surface of the tire while suppressing an increase in air resistance during tire running and the occurrence of cracks on the outer surface of the tire.
本発明では、複数の凸条5は、ベース部4から0.03mm以上0.1mm未満の高さで突出してなることが好ましい。複数の凸条5の高さを0.03mm以上とすることにより、コントラスト効果をさらに得ることができるからである。同様の理由により、複数の凸条5は、ベース部4から0.04mm以上0.1mm未満の高さで突出してなることがより好ましく、複数の凸条5は、ベース部4から0.05mm以上0.1mm未満の高さで突出してなることがさらに好ましい。
一方で、本発明では、ベース部4から0.02mm超0.08mm以下の高さで突出してなることが好ましい。複数の凸条5の高さを0.08mm以下とすることにより、タイヤ走行時の空気抵抗の増大やタイヤ外面におけるクラックの発生をさらに抑制することができるからである。同様の理由により、複数の凸条5は、ベース部4から0.02mm超0.07mm以下の高さで突出してなることがより好ましく、複数の凸条5は、ベース部4から0.02mm超0.06mm以下の高さで突出してなることがさらに好ましい。
なお、複数の凸条5間では、高さや幅を一定にすることが好ましい。高さや幅が異なることにより生じ得るコントラストをなくすことにより、上述したコントラストを目立たせることができるからである。 In the present invention, the plurality ofridges 5 preferably protrude from the base portion 4 at a height of 0.03 mm or more and less than 0.1 mm. This is because the contrast effect can be further obtained by setting the height of the plurality of ridges 5 to 0.03 mm or more. For the same reason, it is more preferable that the plurality of ridges 5 protrude from the base portion 4 at a height of 0.04 mm or more and less than 0.1 mm, and the plurality of ridges 5 are 0.05 mm from the base portion 4. More preferably, the protrusion is formed at a height of not less than 0.1 mm.
On the other hand, in the present invention, it is preferable that the height of thebase portion 4 exceeds 0.02 mm and 0.08 mm or less. By setting the height of the plurality of ridges 5 to be 0.08 mm or less, it is possible to further suppress the increase of air resistance during tire running and the generation of cracks on the outer surface of the tire. For the same reason, it is more preferable that the plurality of ridges 5 project from the base portion 4 at a height of more than 0.02 mm and 0.07 mm or less, and the plurality of ridges 5 are 0.02 mm from the base portion 4. More preferably, the protrusion is formed at a height of more than 0.06 mm.
In addition, it is preferable that the height and the width are constant between the plurality ofridges 5. This is because the above-mentioned contrast can be made conspicuous by eliminating the contrast that can occur due to the difference in height and width.
一方で、本発明では、ベース部4から0.02mm超0.08mm以下の高さで突出してなることが好ましい。複数の凸条5の高さを0.08mm以下とすることにより、タイヤ走行時の空気抵抗の増大やタイヤ外面におけるクラックの発生をさらに抑制することができるからである。同様の理由により、複数の凸条5は、ベース部4から0.02mm超0.07mm以下の高さで突出してなることがより好ましく、複数の凸条5は、ベース部4から0.02mm超0.06mm以下の高さで突出してなることがさらに好ましい。
なお、複数の凸条5間では、高さや幅を一定にすることが好ましい。高さや幅が異なることにより生じ得るコントラストをなくすことにより、上述したコントラストを目立たせることができるからである。 In the present invention, the plurality of
On the other hand, in the present invention, it is preferable that the height of the
In addition, it is preferable that the height and the width are constant between the plurality of
上記の例では、平面視で扇形の単位パターン6の中心角を90°としたが、中心角は、特にこれに限定されるものではない。ただし、パターン領域3aに単位パターン6を略規則的に配置する観点からは、平面視で扇形の単位パターン6の中心角は、80°~100°とすることが好ましく、上記の例のように90°とすることが最も好ましい。
上記の例では、平面視で扇形の単位パターン6の中心角を90°とし、扇形の外周縁を除き、凸条5を19本配置しているが、凸条5の本数は、特に限定されず、例えば、10~25本とすることができる。中心角の大小に応じて、適宜凸条5の本数を増減させることができる。 In the above example, the central angle of the fan-shapedunit pattern 6 is 90° in plan view, but the central angle is not particularly limited to this. However, from the viewpoint of arranging the unit patterns 6 in the pattern region 3a in a substantially regular manner, the central angle of the fan-shaped unit patterns 6 in plan view is preferably 80° to 100°, as in the above example. Most preferably, it is 90°.
In the above example, the central angle of the fan-shapedunit pattern 6 is 90° in plan view, and 19 ridges 5 are arranged excluding the outer peripheral edge of the fan, but the number of ridges 5 is not particularly limited. Instead, for example, the number can be 10 to 25. The number of ridges 5 can be appropriately increased or decreased according to the size of the central angle.
上記の例では、平面視で扇形の単位パターン6の中心角を90°とし、扇形の外周縁を除き、凸条5を19本配置しているが、凸条5の本数は、特に限定されず、例えば、10~25本とすることができる。中心角の大小に応じて、適宜凸条5の本数を増減させることができる。 In the above example, the central angle of the fan-shaped
In the above example, the central angle of the fan-shaped
図4は、本発明の他の実施形態にかかるタイヤの外面のパターン領域を示す平面図である。図4に示すように、パターン領域3aのうち、パターン領域3a外に隣接する領域を端部領域7(7a~7d)とし、端部領域7に囲まれた領域を中央領域8とする。このとき、本例では、図4に示すように、端部領域7の少なくとも一部の凸条5の突出高さが、中央領域8の凸条の突出高さよりも低くなっている。図示例では、端部領域7のうち、パターン領域3a外に、タイヤ径方向内側及び外側に隣接する端部領域7a、7bにおいて、凸条5の突出高さが、中央領域8の凸条の突出高さよりも低くなっており、端部領域7a、7bにおける凸条5の突出高さは、中央領域8側からパターン領域外側へ向かって漸減(連続的に減少)している。
FIG. 4 is a plan view showing a pattern area on the outer surface of a tire according to another embodiment of the present invention. As shown in FIG. 4, of the pattern area 3a, areas adjacent to the outside of the pattern area 3a are referred to as end areas 7 (7a to 7d), and an area surrounded by the end areas 7 is referred to as a central area 8. At this time, in this example, as shown in FIG. 4, the protruding height of at least a part of the ridges 5 in the end region 7 is lower than the protruding height of the ridges in the central region 8. In the illustrated example, in the end regions 7, outside the pattern region 3a, in the end regions 7a and 7b that are adjacent to the inner side and the outer side in the tire radial direction, the protrusion height of the protrusion 5 is equal to that of the protrusion of the central region 8. It is lower than the projecting height, and the projecting height of the ridge 5 in the end regions 7a and 7b gradually decreases (continuously decreases) from the central region 8 side toward the outside of the pattern region.
図4に示す実施形態のタイヤ1によれば、端部領域7の少なくとも一部の凸条5の突出高さが、中央領域8の凸条の突出高さよりも低くなっているため、パターン領域3aからパターン領域3a外へと段階的にコントラストが消失する。特に、図4に示す例では、端部領域7の少なくとも一部の凸条5の突出高さが、中央領域8側からパターン領域外側へ向かって漸減しているため、パターン領域3aからパターン領域3a外へとグラデーション状にコントラストが消失するようになっている。
According to the tire 1 of the embodiment shown in FIG. 4, since the protruding height of at least a part of the ridges 5 in the end area 7 is lower than the protruding height of the ridges in the central area 8, the pattern area The contrast gradually disappears from 3a to the outside of the pattern area 3a. In particular, in the example shown in FIG. 4, the projecting height of at least a part of the ridges 5 of the end region 7 gradually decreases from the central region 8 side toward the outside of the pattern region. The contrast disappears in a gradation pattern to the outside of 3a.
図4に示す例では、端部領域7のうち、パターン領域3a外に、タイヤ径方向内側及び外側に隣接する端部領域7a、7bにおいて、凸条5の突出高さを、中央領域8の凸条の突出高さよりも低くしたが、上記端部領域7a及び7bのうちいずれか一方のみにおいて、凸条5の突出高さを、中央領域8の凸条の突出高さよりも低くする(例えば、中央領域8側からパターン領域外側へ向かって漸減させる)こともできる。このとき、端部領域7のうち、パターン領域3a外に、タイヤ周方向両側に隣接する端部領域7c及び/又は7dについては、凸条5の突出高さを、中央領域8の凸条の突出高さよりも低くすることも高くすることもできるし、中央領域8の凸条の突出高さと同じ高さとすることもできる。
また、上記端部領域7c、7dの少なくとも一方のみにおいて、凸条5の突出高さを、中央領域8の凸条の突出高さよりも低くする(例えば、中央領域8側からパターン領域外側へ向かって漸減させる)こともできる。このとき、上記端部領域7a及び/又は7bについては、凸条5の突出高さを、中央領域8の凸条の突出高さよりも低くすることも高くすることもできるし、中央領域8の凸条の突出高さと同じ高さとすることもできる。
なお、中央領域8においては、複数の凸条5間で高さや幅を一定にすることが好ましい。高さや幅が異なることにより生じ得るコントラストをなくすことにより、上述したコントラストを目立たせることができるからである。また、端部領域7においては、複数の凸条5の幅を一定にすることが好ましい。幅が異なることにより生じ得るコントラストをなくすことにより、上述したコントラストを目立たせることができるからである。
凸条5の突出高さを上記のように低くする端部領域7a及び/又は7bのタイヤ径方向の幅は、特に限定されないが、中央領域8の面積を確保しつつ、上記のコントラスト消失の視覚も得る観点から、それぞれ、パターン領域3aのタイヤ径方向の幅の3~20%とすることが好ましい。同様に、端部領域7c及び/又は7dのタイヤ周方向の幅は、それぞれ、パターン領域3a全体のタイヤ周方向の幅の3~20%とすることが好ましい。 In the example shown in FIG. 4, in theend regions 7, outside the pattern region 3a, in the end regions 7a and 7b that are adjacent to the inner side and the outer side in the tire radial direction, the protruding height of the ridge 5 is Although it is lower than the protruding height of the ridge, the protruding height of the ridge 5 is made lower than the protruding height of the ridge of the central area 8 in only one of the end regions 7a and 7b (for example, , Gradually decreasing from the central region 8 side toward the outside of the pattern region). At this time, of the end regions 7, outside the pattern region 3a, for the end regions 7c and/or 7d adjacent on both sides in the tire circumferential direction, the protrusion height of the protrusion 5 is set to the protrusion height of the center region 8. The height may be lower or higher than the protruding height, or may be the same as the protruding height of the ridge in the central region 8.
Further, in only at least one of the end regions 7c and 7d, the protruding height of theridge 5 is set to be lower than the protruding height of the ridge in the central region 8 (for example, from the central region 8 side to the outside of the pattern region). Can be gradually reduced). At this time, in the end regions 7a and/or 7b, the protruding height of the ridges 5 can be set lower or higher than the protruding height of the ridges in the central region 8, or the protruding height of the central region 8 can be increased. The height may be the same as the protruding height of the ridge.
In addition, in thecentral region 8, it is preferable that the heights and the widths of the plurality of ridges 5 are constant. This is because the above-mentioned contrast can be made conspicuous by eliminating the contrast that can occur due to the difference in height and width. Further, in the end region 7, it is preferable that the widths of the plurality of ridges 5 are constant. This is because the above-mentioned contrast can be made conspicuous by eliminating the contrast that can occur due to the different widths.
The width in the tire radial direction of the end regions 7a and/or 7b that lowers the protruding height of theridges 5 as described above is not particularly limited, but while maintaining the area of the central region 8, the contrast From the viewpoint of obtaining visual sense as well, the width is preferably 3 to 20% of the width of the pattern region 3a in the tire radial direction. Similarly, the width of the end regions 7c and/or 7d in the tire circumferential direction is preferably 3 to 20% of the width of the entire pattern region 3a in the tire circumferential direction.
また、上記端部領域7c、7dの少なくとも一方のみにおいて、凸条5の突出高さを、中央領域8の凸条の突出高さよりも低くする(例えば、中央領域8側からパターン領域外側へ向かって漸減させる)こともできる。このとき、上記端部領域7a及び/又は7bについては、凸条5の突出高さを、中央領域8の凸条の突出高さよりも低くすることも高くすることもできるし、中央領域8の凸条の突出高さと同じ高さとすることもできる。
なお、中央領域8においては、複数の凸条5間で高さや幅を一定にすることが好ましい。高さや幅が異なることにより生じ得るコントラストをなくすことにより、上述したコントラストを目立たせることができるからである。また、端部領域7においては、複数の凸条5の幅を一定にすることが好ましい。幅が異なることにより生じ得るコントラストをなくすことにより、上述したコントラストを目立たせることができるからである。
凸条5の突出高さを上記のように低くする端部領域7a及び/又は7bのタイヤ径方向の幅は、特に限定されないが、中央領域8の面積を確保しつつ、上記のコントラスト消失の視覚も得る観点から、それぞれ、パターン領域3aのタイヤ径方向の幅の3~20%とすることが好ましい。同様に、端部領域7c及び/又は7dのタイヤ周方向の幅は、それぞれ、パターン領域3a全体のタイヤ周方向の幅の3~20%とすることが好ましい。 In the example shown in FIG. 4, in the
Further, in only at least one of the end regions 7c and 7d, the protruding height of the
In addition, in the
The width in the tire radial direction of the end regions 7a and/or 7b that lowers the protruding height of the
本発明では、パターン領域は、複数の凸条を密集配置した単位パターンを有し、単位パターンは、単位パターンに含まれる複数の凸条の延在長さの和Lsと、単位パターンの全体の面積Sとの比Ls/Sが、1.5~5.5(mm/mm2)であることが好ましい。比Ls/Sを1.5(mm/mm2)以上とすることにより、単位パターンにおいて密な箇所を有効に形成することができ、一方で、比Ls/Sを5.5(mm/mm2)以下とすることにより、単位パターン全体における密な箇所の面積が大きくなり過ぎないようにすることができる。これにより、コントラストをより効果的に得ることができる。
同様の理由により、上記比Ls/Sは、2.5~4.5(mm/mm2)とすることがより好ましい。
また、本発明では、単位パターンの全体の面積Sに対する、凸条の本数は、3~21(本/mm2)とすることが好ましい。3(本/mm2)以上とすることにより、単位パターンにおいて密な箇所を有効に形成することができ、一方で、21(本/mm2)以下とすることにより、単位パターン全体における密な箇所の面積が大きくなり過ぎないようにすることができる。これにより、コントラストをより効果的に得ることができる。
同様の理由により、単位パターンの全体の面積Sに対する、凸条の本数は、9~15(本/mm2)とすることがより好ましい。 In the present invention, the pattern region has a unit pattern in which a plurality of convex stripes are densely arranged, and the unit pattern is a sum Ls of extension lengths of a plurality of convex stripes included in the unit pattern and the entire unit pattern. The ratio Ls/S to the area S is preferably 1.5 to 5.5 (mm/mm 2 ). By setting the ratio Ls/S to 1.5 (mm/mm 2 ) or more, it is possible to effectively form a dense portion in the unit pattern, while the ratio Ls/S is 5.5 (mm/mm 2 ). 2 ) By setting the following, it is possible to prevent the area of the dense portion in the entire unit pattern from becoming too large. Thereby, the contrast can be obtained more effectively.
For the same reason, the ratio Ls/S is more preferably 2.5 to 4.5 (mm/mm 2 ).
Further, in the present invention, it is preferable that the number of ridges is 3 to 21 (lines/mm 2 ) with respect to the entire area S of the unit pattern. By setting the number to be 3 (lines/mm 2 ) or more, it is possible to effectively form a dense portion in the unit pattern, while, by setting the number to be 21 (lines/mm 2 ) or less, the dense area in the entire unit pattern can be formed. The area of the place can be prevented from becoming too large. Thereby, the contrast can be obtained more effectively.
For the same reason, it is more preferable that the number of ridges with respect to the entire area S of the unit pattern is 9 to 15 (lines/mm 2 ).
同様の理由により、上記比Ls/Sは、2.5~4.5(mm/mm2)とすることがより好ましい。
また、本発明では、単位パターンの全体の面積Sに対する、凸条の本数は、3~21(本/mm2)とすることが好ましい。3(本/mm2)以上とすることにより、単位パターンにおいて密な箇所を有効に形成することができ、一方で、21(本/mm2)以下とすることにより、単位パターン全体における密な箇所の面積が大きくなり過ぎないようにすることができる。これにより、コントラストをより効果的に得ることができる。
同様の理由により、単位パターンの全体の面積Sに対する、凸条の本数は、9~15(本/mm2)とすることがより好ましい。 In the present invention, the pattern region has a unit pattern in which a plurality of convex stripes are densely arranged, and the unit pattern is a sum Ls of extension lengths of a plurality of convex stripes included in the unit pattern and the entire unit pattern. The ratio Ls/S to the area S is preferably 1.5 to 5.5 (mm/mm 2 ). By setting the ratio Ls/S to 1.5 (mm/mm 2 ) or more, it is possible to effectively form a dense portion in the unit pattern, while the ratio Ls/S is 5.5 (mm/
For the same reason, the ratio Ls/S is more preferably 2.5 to 4.5 (mm/mm 2 ).
Further, in the present invention, it is preferable that the number of ridges is 3 to 21 (lines/mm 2 ) with respect to the entire area S of the unit pattern. By setting the number to be 3 (lines/mm 2 ) or more, it is possible to effectively form a dense portion in the unit pattern, while, by setting the number to be 21 (lines/mm 2 ) or less, the dense area in the entire unit pattern can be formed. The area of the place can be prevented from becoming too large. Thereby, the contrast can be obtained more effectively.
For the same reason, it is more preferable that the number of ridges with respect to the entire area S of the unit pattern is 9 to 15 (lines/mm 2 ).
本発明では、単位パターンにおいて、複数の凸条は、隣り合う凸条間の距離が、凸条の延在方向の一方向に向かって漸減することが好ましい。隣り合う凸条間の距離に疎密が形成されるようにして、密な箇所が暗く、疎な箇所が明るいグラデーションの効果を得ることができるからである。これにより、コントラストをさらに効果的に得ることができる。
In the present invention, in the unit pattern, it is preferable that, in the plurality of ridges, the distance between the adjacent ridges gradually decreases in one direction of the extending direction of the ridges. This is because sparseness and denseness are formed in the distance between the adjacent ridges, so that it is possible to obtain a gradation effect in which dense areas are dark and sparse areas are bright. Thereby, the contrast can be obtained more effectively.
本発明では、単位パターンにおいて、凸条の延在長さが、250~350mmであることが好ましい。凸条の延在長さLを250mm以上とすることにより、密な箇所を有効に形成することができ、一方で、350mm以下とすることにより、密な箇所の面積が大きくなり過ぎないようにすることができる。これにより、コントラストをより効果的に得ることができる。
同様の理由により、凸条の延在長さは、275~325mmとすることがより好ましい。 In the present invention, the extension length of the ridge in the unit pattern is preferably 250 to 350 mm. By setting the extension length L of the ridge to 250 mm or more, it is possible to effectively form a dense portion, and by setting it to 350 mm or less, the area of the dense portion is prevented from becoming too large. can do. Thereby, the contrast can be obtained more effectively.
For the same reason, the extension length of the ridge is more preferably 275 to 325 mm.
同様の理由により、凸条の延在長さは、275~325mmとすることがより好ましい。 In the present invention, the extension length of the ridge in the unit pattern is preferably 250 to 350 mm. By setting the extension length L of the ridge to 250 mm or more, it is possible to effectively form a dense portion, and by setting it to 350 mm or less, the area of the dense portion is prevented from becoming too large. can do. Thereby, the contrast can be obtained more effectively.
For the same reason, the extension length of the ridge is more preferably 275 to 325 mm.
本発明では、パターン領域は、平面視で扇形の単位パターンの繰り返しからなることが好ましい。単位パターンを密に配置して、パターン領域全体の多くの箇所でコントラストを得ることができるからである。
特に、上記実施形態のように、平面視で扇形の単位パターン6に扇形の中心から放射状に延びる複数の凸条5を形成することにより、疎密を形成することが、コントラスト効果を得る上でより好ましい。 In the present invention, it is preferable that the pattern region is composed of repeating unit patterns that are fan-shaped in plan view. This is because the unit patterns can be arranged densely and contrast can be obtained in many places in the entire pattern region.
In particular, as in the above embodiment, by forming a plurality ofconvex stripes 5 radially extending from the center of the fan shape in the fan-shaped unit pattern 6 in a plan view, it is more effective to form a sparse and dense pattern in order to obtain a contrast effect. preferable.
特に、上記実施形態のように、平面視で扇形の単位パターン6に扇形の中心から放射状に延びる複数の凸条5を形成することにより、疎密を形成することが、コントラスト効果を得る上でより好ましい。 In the present invention, it is preferable that the pattern region is composed of repeating unit patterns that are fan-shaped in plan view. This is because the unit patterns can be arranged densely and contrast can be obtained in many places in the entire pattern region.
In particular, as in the above embodiment, by forming a plurality of
本発明では、パターン領域のうち、パターン領域外に隣接する領域を端部領域とし、端部領域に囲まれた領域を中央領域とするとき、端部領域の少なくとも一部の凸条の突出高さが、中央領域の凸条の突出高さよりも低いことが好ましい。パターン領域からパターン領域外へと段階的にコントラストが消失するようにすることができるからである。
In the present invention, when the area adjacent to the outside of the pattern area in the pattern area is defined as the end area and the area surrounded by the end area is defined as the central area, the protrusion height of at least part of the ridge of the end area is defined. Is preferably lower than the protruding height of the ridge in the central region. This is because the contrast can be gradually lost from the pattern area to the outside of the pattern area.
本発明では、端部領域の少なくとも一部の凸条の突出高さは、中央領域側からパターン領域外側へ向かって漸減することが好ましい。パターン領域からパターン領域外へとグラデーション状にコントラストが消失するようにすることができるからである。
In the present invention, it is preferable that the protrusion height of at least a part of the ridges in the end region gradually decreases from the central region side toward the outside of the pattern region. This is because it is possible to make the contrast disappear like a gradation from the pattern area to the outside of the pattern area.
以上、本発明の実施形態について説明したが、本発明は上記の実施形態に何ら限定されるものではない。例えば、上記の実施形態では、標章部3は、タイヤ1の外面の、周上の互いにタイヤ周方向に180°離れた2箇所に形成されているが、標章部3は、タイヤ1の外面の、周上の1箇所以上に形成されていれば良い。上記の実施形態では、表示している標章(文字)3bが2箇所とも同じであるが異ならせることもでき、特に複数の種類の標章(文字等)3bを設ける場合に、標章部3を2箇所以上設けることが好ましい。一方、1つの標章(文字等)3bを設ける場合には、標章部3を2箇所以上とすることも、1箇所とすることもできる。標章(文字等)3bを設けずに、パターン領域3aのみで標章部3を構成する場合には、タイヤ1の外面の、周上全域にわたってパターン領域3aを設けることもできる。
The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments. For example, in the above embodiment, the mark portions 3 are formed on the outer surface of the tire 1 at two locations on the circumference, which are 180° apart from each other in the tire circumferential direction. It may be formed at one or more locations on the outer circumference. In the above embodiment, the displayed mark (character) 3b is the same in both places, but it can be different. Especially when a plurality of types of mark (character etc.) 3b are provided, the mark part It is preferable to provide 3 in two or more places. On the other hand, when one mark (character etc.) 3b is provided, the mark part 3 can be provided at two or more places or at one place. When the mark portion 3 is composed of only the pattern region 3a without providing the mark (characters or the like) 3b, the pattern region 3a may be provided over the entire circumference of the outer surface of the tire 1.
さらに、上記の実施形態では、単位パターン6は、平面視で扇形としていたが、他にも、平面視で三角形状、矩形状、円形状、楕円形状等様々な形状とすることができる。いずれの形状においても、凸条5を例えば放射状に配置することにより、疎密を形成して、コントラストを得ることができる。
Furthermore, in the above-described embodiment, the unit pattern 6 has a fan shape in a plan view, but may have various shapes such as a triangular shape, a rectangular shape, a circular shape, and an elliptical shape in a plan view. In any shape, by arranging the ridges 5 radially, for example, sparseness and denseness can be formed and contrast can be obtained.
1:タイヤ
2:サイドウォール部
3:標章部、 3a:パターン領域、 3b:標章
4:ベース部
5:凸条
6、6a、6b、6c、6d:単位パターン
7、7a、7b、7c、7d:端部領域
8:中央領域 1: tire 2: sidewall part 3: mark part, 3a: pattern region, 3b: mark 4: base part 5: ridges 6, 6a, 6b, 6c, 6d: unit patterns 7, 7a, 7b, 7c , 7d: edge area 8: central area
2:サイドウォール部
3:標章部、 3a:パターン領域、 3b:標章
4:ベース部
5:凸条
6、6a、6b、6c、6d:単位パターン
7、7a、7b、7c、7d:端部領域
8:中央領域 1: tire 2: sidewall part 3: mark part, 3a: pattern region, 3b: mark 4: base part 5:
Claims (7)
- タイヤの外面に形成され、ベース部を有するパターン領域を有し、
前記パターン領域は、前記ベース部から0.02mm超0.1mm未満の高さで突出した複数の凸条を有することを特徴とする、タイヤ。 Formed on the outer surface of the tire, having a pattern region having a base portion,
The tire, wherein the pattern region has a plurality of ridges protruding from the base portion at a height of more than 0.02 mm and less than 0.1 mm. - 前記パターン領域は、前記複数の凸条を密集配置した単位パターンを有し、
前記単位パターンは、前記単位パターンに含まれる前記複数の凸条の延在長さの和Lsと、前記単位パターンの全体の面積Sとの比Ls/Sが、1.5~5.5(mm/mm2)である、請求項1に記載のタイヤ。 The pattern region has a unit pattern in which the plurality of ridges are densely arranged,
In the unit pattern, the ratio Ls/S of the sum Ls of the extended lengths of the plurality of protrusions included in the unit pattern and the total area S of the unit pattern is 1.5 to 5.5 ( mm/mm< 2 >) The tire according to claim 1. - 前記単位パターン内において、前記複数の凸条は、隣り合う前記凸条間の距離が、前記凸条の延在方向の一方向に向かって漸減する、請求項2に記載のタイヤ。 The tire according to claim 2, wherein in the unit pattern, a distance between the adjacent ridges of the plurality of ridges gradually decreases in one direction of an extending direction of the ridges.
- 前記単位パターン内において、前記凸条の延在長さが、250~350mmである、請求項2又は3に記載のタイヤ。 The tire according to claim 2 or 3, wherein an extension length of the ridge in the unit pattern is 250 to 350 mm.
- 前記パターン領域は、平面視で扇形の単位パターンの繰り返しからなる、請求項1~4のいずれか一項に記載のタイヤ。 The tire according to any one of claims 1 to 4, wherein the pattern area is formed by repeating unit patterns that are fan-shaped in a plan view.
- 前記パターン領域のうち、前記パターン領域外に隣接する領域を端部領域とし、前記端部領域に囲まれた領域を中央領域とするとき、
前記端部領域の少なくとも一部の前記凸条の突出高さが、前記中央領域の前記凸条の突出高さよりも低い、請求項1~5のいずれか一項に記載のタイヤ。 Of the pattern area, an area adjacent to the outside of the pattern area is an end area, and an area surrounded by the end areas is a central area,
The tire according to any one of claims 1 to 5, wherein a protruding height of the ridge in at least a part of the end region is lower than a protruding height of the ridge in the central region. - 前記端部領域の少なくとも一部の前記凸条の突出高さは、前記中央領域側から前記パターン領域外側へ向かって漸減する、請求項6に記載のタイヤ。
The tire according to claim 6, wherein a protruding height of the ridge in at least a part of the end region gradually decreases from the central region side toward the outside of the pattern region.
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0948217A (en) * | 1995-08-09 | 1997-02-18 | Bridgestone Corp | Pneumatic tire having decorative body constituted of many ridges |
US20020174928A1 (en) * | 2001-05-25 | 2002-11-28 | Ratliff Billy Joe | Tire sidewall |
JP2003246209A (en) * | 2002-02-22 | 2003-09-02 | Yokohama Rubber Co Ltd:The | Diene based rubber molded article, tire and its die |
JP2014037158A (en) * | 2012-08-10 | 2014-02-27 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
JP2016084041A (en) * | 2014-10-27 | 2016-05-19 | 株式会社ブリヂストン | Pneumatic tire |
JP2016523763A (en) * | 2013-07-01 | 2016-08-12 | ブリヂストン アメリカズ タイヤ オペレーションズ、 エルエルシー | Method and apparatus for creating visual effects on rubber articles |
JP2017001439A (en) * | 2015-06-05 | 2017-01-05 | 株式会社ブリヂストン | tire |
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2018
- 2018-12-25 JP JP2018241648A patent/JP7138039B2/en active Active
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Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0948217A (en) * | 1995-08-09 | 1997-02-18 | Bridgestone Corp | Pneumatic tire having decorative body constituted of many ridges |
US20020174928A1 (en) * | 2001-05-25 | 2002-11-28 | Ratliff Billy Joe | Tire sidewall |
JP2003246209A (en) * | 2002-02-22 | 2003-09-02 | Yokohama Rubber Co Ltd:The | Diene based rubber molded article, tire and its die |
JP2014037158A (en) * | 2012-08-10 | 2014-02-27 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
JP2016523763A (en) * | 2013-07-01 | 2016-08-12 | ブリヂストン アメリカズ タイヤ オペレーションズ、 エルエルシー | Method and apparatus for creating visual effects on rubber articles |
JP2016084041A (en) * | 2014-10-27 | 2016-05-19 | 株式会社ブリヂストン | Pneumatic tire |
JP2017001439A (en) * | 2015-06-05 | 2017-01-05 | 株式会社ブリヂストン | tire |
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