JP2004338655A - Pneumatic tire - Google Patents
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- JP2004338655A JP2004338655A JP2003140237A JP2003140237A JP2004338655A JP 2004338655 A JP2004338655 A JP 2004338655A JP 2003140237 A JP2003140237 A JP 2003140237A JP 2003140237 A JP2003140237 A JP 2003140237A JP 2004338655 A JP2004338655 A JP 2004338655A
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- ridge
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Abstract
Description
【0001】
【発明の属する技術分野】
本発明は、空気入りタイヤの側面に刻まれた装飾体に関する。
【0002】
【従来の技術】
従来から、タイヤの側面にリッジと呼ばれる微細な溝を多数刻んで装飾体を構成し、該装飾体により標章などを表示していた。例えば、標章となる領域にのみリッジを刻み、リッジが刻まれていない背景とは光の反射の具合が異なることを利用して、標章を表示していた。
【0003】
あるいは、標章となる領域(標章領域)及び背景となる領域(背景領域)にリッジを刻み、両領域においてリッジの間隔及び/又は方向を互いに異ならせて、コントラストの違いを与えて標章の視認性を向上させていた。例えば、特許文献1に開示されたタイヤ側面に装飾体を備えた空気入りタイヤがある。
【0004】
【特許文献1】
特開平8−282215号公報(第1〜3頁、第1〜5図)。
【0005】
【発明が解決しようとする課題】
かかる従来の空気入りタイヤにおいては、標章領域内及び背景領域内では、リッジの間隔及び方向は変化していなかったので一様に視認される。したがって、見る角度によっては標章の視認性が低下することがあった。
【0006】
タイヤを車両に装着した状態ではタイヤ側面が視認されやすいので、該装飾体により自己の商品をアピールしてきた。しかし、標章領域及び背景領域は一様にリッジが刻まれているので、標章も一様に視認され需要者に与えるインパクトに欠けていた。そのため、タイヤ側面の装飾体に新たな視覚的な効果を生じせしめ、購買意欲を高めることが要求されていた。
【0007】
また、加硫成型においては、リッジを形成する部分の金型とタイヤとの間にエアが入り製造不良が発生しやすくなるため、金型に多数のベントホールを設けなければならず、金型加工のコスト高となっていた。また、成型後においても多数のベントスピューが発生するので装飾体の美観及び視認性を劣化させていた。
【0008】
したがって、本発明の目的は、タイヤ側面に刻まれた装飾体に従来にない視覚的な効果を与えると共に、加硫成型時のエア入りを防止することにある。
【0009】
【課題を解決するための手段】
上記課題を解決するため、鋭意検討した結果、請求項1に記載の発明は、タイヤ側面にリッジが刻まれた空気入りタイヤにおいて、
タイヤ子午線に対して第1方向に延びる第1リッジと、タイヤ子午線に対して前記第1方向と異なる第2方向に延び、標章を表示する第2リッジが刻まれて、
前記第1リッジと前記第2リッジとが交差していることを特徴とする空気入りタイヤとした。
【0010】
例えば、第1リッジをタイヤ側面の環状領域に刻まれたリッジとし、標章を表示する第2リッジを表示したい標章領域に前記第1リッジに交差するように第1リッジとは異なる方向に延びて刻まれたリッジとする。第1リッジ及び第2リッジが刻まれている標章領域において、両リッジは延びる方向が異なって交差しているので、第1リッジのみが刻まれている背景領域とは光の反射の具合などが異なる。その結果、標章領域は視認され、しかも、両リッジが密な箇所と、両リッジが疎な箇所ができ、濃淡が現れて視認され、従来にない視覚的な効果が生じる。
【0011】
請求項2に記載の発明は、前記第1方向と前記第2方向との交差角度が1度〜10度である請求項1に記載の空気入りタイヤとした。
【0012】
交差角度はいずれでも構わないが、1度〜10度であることが好ましい。該角度の範囲であれば、周期的にリッジの疎密が現れ、疎密に応じて標章に濃淡が現れ新たな視覚的効果が生じる。
【0013】
請求項3に記載の発明は、前記第1リッジの稜線と、前記第2リッジの稜線とが実質的に同一面上にある請求項1又は2に記載の空気入りタイヤとした。
【0014】
第1リッジと第2リッジの稜線が同一面上にあれば、リッジを形成する金型の溝の深さもほぼ等しくなる。その結果、加硫成型時において、金型内の空気の流れが均一化され、空気が溜まることなくリッジを形成することができる。
【0015】
請求項4に記載の発明は、前記第1リッジの稜線間隔及び前記第2リッジの稜線間隔が0.5mm〜2.0mmである請求項1乃至3のいずれかに記載の空気入りタイヤとした。
【0016】
特に、前記第1リッジの稜線間隔及び前記第2リッジの稜線間隔が0.5mm〜2.0mmであることが好ましい。稜線間隔が0.5mm未満であると、稜線間隔が狭いため、リッジの疎密が顕在化せず、標章の濃淡がはっきりと現れない。また、稜線間隔が2.0mmを越えても、刻まれるリッジの本数が相対的に少なくなるので標章の濃淡が現れなくなる。
【0017】
【発明の実施の形態】
以下、図面を用いて、本発明に係る空気入りタイヤの実施形態を説明する。図1は、本発明に係るタイヤ側面に刻まれたリッジを示す概略図である。図1(a)において、第1リッジR1はタイヤ側面Sの表面に略環状に刻まれたリッジであり、その一部を示している。第1リッジR1の延びる方向D1は、タイヤ子午線Mと同じ方向となっている。標章を表示する第2リッジR2は、標章として「T」の字を示す様に刻まれており、D1とは異なる方向D2に延びている。
【0018】
交差角度θをなして、第1リッジR1と第2リッジR2は交差して刻まれているので、第1リッジR1を背景領域、第2リッジR2を標章領域として装飾体を成し、標章が視認される。しかも、標章領域において、第1リッジR1及び第2リッジR2の稜線が密な箇所と稜線が疎な箇所が周期的に現れ、標章に濃淡現れて視認され、従来のリッジによる装飾体にはなかった視覚的効果が生じる。
【0019】
また、図1(b)、(c)のA線断面図、B線断面図に示すように、第1リッジR1及び第2リッジR2の稜線間隔はdであり、dは0.5mm〜2.0mmが好ましい。両リッジR1、R2の稜線が同一面上になるように、リッジの高さhを等しくすることにより、リッジを形成する金型の溝の深さもほぼ等しくなる。その結果、加硫成型時において、金型内の空気の流れが均一化され、空気が溜まることなくリッジを形成することができる。
【0020】
なお、第1リッジR1は環状に刻まれていなくても、環状の一部に刻まれてもよく、要するに背景領域となっていればよい。また、刻まれる方向D1はタイヤ子午線Mと同じでなくてもよく、いずれの角度(0度〜90度)をなして刻まれてもよい。そして、第2リッジR2は、D1と異なる方向D2に延び第1リッジR1に交差して刻まれていればよく、交差角度は1度〜10度が好ましい。また、本発明においては、標章は文字、図形、記号などに限らず、例えば、縞模様や市松模様などの模様も含まれ、同様に上述した視覚的効果が生じる。
【0021】
【実施例】
実施例として本発明に係るリッジを備えた空気入りタイヤ、比較例として従来のリッジを備えた空気入りタイヤをそれぞれ試作した。実施例に係るリッジは、図1に示したリッジであり、寸法は表1に示す。比較例に係るリッジは、図2に示すように、背景領域となる第1リッジR1と標章領域となる第2リッジR2が交差せずに刻まれ、各リッジの高さは表1の通りである。
【0022】
評価項目及び結果は表1に示す通りである。表1において、エア入りは、同じベントホール数の金型により試作した100本のタイヤのうちエア入り不良が認められたタイヤの本数の逆数を示す。ベントホール数は、エア入り不良がなくなるまで金型にベントホールを追加したときのベントホール数の逆数を示す。視認性は、標章の視認性を官能評価した値である。いずれも比較例を100とした指数で表し、数字が大きいほど評価が高いことになる。
【0023】
【表1】
【0024】
表1の結果によれば、実施例においては、視認性をほぼ同等に保ちながら、加硫成型時のエア入りを防止でき、従来にない視覚的な効果を与えることができた。
【0025】
【発明の効果】
以上の通り、本発明の空気入りタイヤにおいて、タイヤ側面に、タイヤ子午線に対して第1方向に延びる第1リッジと、タイヤ子午線に対して前記第1方向と異なる第2方向に延び、標章を表示する第2リッジが刻まれて、第1リッジと第2リッジとが交差している構造とした。その結果、タイヤ側面に刻まれた装飾体に従来にない視覚的な効果を与えると共に、加硫成型時のエア入りを防止することができる。
【図面の簡単な説明】
【図1】本発明に係る空気入りタイヤの側面のリッジを示す要部概略図で、(a)は正面図、(b)はA線断面図、(c)はB線断面図である。
【図2】比較例に係るリッジを示す要部概略図である。
【符号の説明】
R1 第1リッジ
R2 第2リッジ
M タイヤ子午線
S タイヤ側面[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a decorative body engraved on a side surface of a pneumatic tire.
[0002]
[Prior art]
Conventionally, a decorative body has been formed by carving a number of fine grooves called ridges on the side surface of a tire, and a mark or the like is displayed on the decorative body. For example, a ridge is engraved only in an area to be a mark, and the mark is displayed by utilizing the fact that the degree of light reflection is different from that of a background having no ridge.
[0003]
Alternatively, a mark is formed by engraving a ridge in an area serving as a mark (mark area) and an area serving as a background (background area), and making the intervals and / or directions of the ridges different in both areas to give a difference in contrast. Had improved visibility. For example, there is a pneumatic tire disclosed in Patent Literature 1 having a decorative body on a tire side surface.
[0004]
[Patent Document 1]
JP-A-8-282215 (pages 1 to 3, FIGS. 1 to 5).
[0005]
[Problems to be solved by the invention]
In such a conventional pneumatic tire, the interval and direction of the ridges are not changed in the mark area and the background area, so that they can be visually recognized uniformly. Therefore, the visibility of the mark may be reduced depending on the viewing angle.
[0006]
Since the side surface of the tire is easily visible when the tire is mounted on the vehicle, the decorative article has been used to appeal one's own product. However, since the ridges are uniformly formed in the mark area and the background area, the mark is also visually recognized uniformly and lacks an impact on the consumer. Therefore, there has been a demand for a new visual effect on the decorative body on the side of the tire to increase the purchase motivation.
[0007]
In addition, in the vulcanization molding, since air enters between the tire and the tire in the portion where the ridge is formed and manufacturing defects easily occur, a large number of vent holes must be provided in the mold. The cost of processing was high. Further, even after molding, a large number of bent spews are generated, which deteriorates the appearance and visibility of the decorative body.
[0008]
Accordingly, an object of the present invention is to provide a decorative body engraved on the side surface of a tire with a visual effect that has not been seen before, and to prevent air from entering during vulcanization molding.
[0009]
[Means for Solving the Problems]
As a result of intensive studies to solve the above-mentioned problems, the invention according to claim 1 provides a pneumatic tire in which a ridge is carved on the tire side surface,
A first ridge extending in a first direction with respect to the tire meridian, and a second ridge extending in a second direction different from the first direction with respect to the tire meridian and displaying a mark,
The pneumatic tire is characterized in that the first ridge and the second ridge intersect.
[0010]
For example, the first ridge is a ridge engraved in an annular area on the side surface of the tire, and a second ridge for displaying a mark is located in a mark area where the mark is desired to be displayed in a direction different from the first ridge so as to intersect the first ridge. The ridge is extended and carved. In the mark area where the first ridge and the second ridge are engraved, the two ridges extend in different directions and intersect with each other. Therefore, the background area where only the first ridge is engraved and the degree of light reflection are different. Are different. As a result, the mark area is visually recognized, and a portion where both ridges are dense and a portion where both ridges are sparse are formed.
[0011]
The invention according to
[0012]
The intersection angle may be any, but is preferably 1 degree to 10 degrees. When the angle is within the range, the density of the ridge appears periodically, and the mark becomes dark and light according to the density, and a new visual effect is generated.
[0013]
The invention according to claim 3 is the pneumatic tire according to
[0014]
If the ridge lines of the first ridge and the second ridge are on the same plane, the depths of the grooves of the mold forming the ridge become substantially equal. As a result, at the time of vulcanization molding, the flow of air in the mold is made uniform, and a ridge can be formed without accumulation of air.
[0015]
The invention according to claim 4 is the pneumatic tire according to any one of claims 1 to 3, wherein a ridge interval between the first ridges and a ridge interval between the second ridges is 0.5 mm to 2.0 mm. .
[0016]
In particular, it is preferable that the ridge interval between the first ridge and the ridge line between the second ridge is 0.5 mm to 2.0 mm. When the interval between the ridge lines is less than 0.5 mm, the interval between the ridge lines is small, so that the density of the ridge does not become apparent and the shading of the mark does not appear clearly. Further, even if the ridge line interval exceeds 2.0 mm, the number of ridges to be carved is relatively reduced, so that shading of the mark does not appear.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a pneumatic tire according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic view showing a ridge carved on a tire side surface according to the present invention. In FIG. 1A, a first ridge R1 is a ridge formed in a substantially annular shape on the surface of the tire side surface S, and a part thereof is shown. The direction D1 in which the first ridge R1 extends is the same direction as the tire meridian M. The second ridge R2 for displaying a mark is engraved so as to show a letter "T" as the mark, and extends in a direction D2 different from D1.
[0018]
Since the first ridge R1 and the second ridge R2 are carved so as to intersect at an intersection angle θ, a decorative body is formed with the first ridge R1 as a background region and the second ridge R2 as a mark region. Chapters are visible. Moreover, in the mark area, the places where the ridge lines of the first ridge R1 and the second ridge R2 are dense and the places where the ridge lines are sparse appear periodically, appear in the mark in dark and light, and are visually recognized. There was no visual effect.
[0019]
1B and 1C, the distance between the ridge lines of the first ridge R1 and the second ridge R2 is d, and d is 0.5 mm to 2 mm. 0.0 mm is preferred. By making the heights h of the ridges equal so that the ridge lines of both the ridges R1 and R2 are on the same plane, the depths of the grooves of the mold forming the ridges are also substantially equal. As a result, at the time of vulcanization molding, the flow of air in the mold is made uniform, and a ridge can be formed without accumulation of air.
[0020]
Note that the first ridge R1 may not be carved in a ring shape, or may be carved in a part of the ring shape, in short, as long as it is a background region. Further, the direction D1 to be carved may not be the same as the tire meridian M, and may be carved at any angle (0 to 90 degrees). The second ridge R2 only needs to extend in the direction D2 different from D1 and be cut across the first ridge R1, and the crossing angle is preferably 1 to 10 degrees. Further, in the present invention, the mark is not limited to characters, figures, symbols, and the like, but includes, for example, a pattern such as a striped pattern or a checkered pattern, and similarly, the above-described visual effect is generated.
[0021]
【Example】
A pneumatic tire provided with a ridge according to the present invention was manufactured as an example, and a conventional pneumatic tire provided with a ridge was manufactured as a comparative example. The ridge according to the example is the ridge shown in FIG. 1 and the dimensions are shown in Table 1. As shown in FIG. 2, the ridge according to the comparative example is carved without intersecting a first ridge R1 serving as a background region and a second ridge R2 serving as a mark region, and the height of each ridge is as shown in Table 1. It is.
[0022]
The evaluation items and results are as shown in Table 1. In Table 1, “air-filled” indicates the reciprocal of the number of tires having poor air-filling out of 100 tires prototyped with molds having the same number of vent holes. The number of vent holes indicates the reciprocal of the number of vent holes when a vent hole is added to the mold until there is no defective air entry. The visibility is a value obtained by sensory evaluation of the visibility of the mark. Each is represented by an index with the comparative example being 100, and the larger the number, the higher the evaluation.
[0023]
[Table 1]
[0024]
According to the results shown in Table 1, in the examples, it was possible to prevent air from entering at the time of vulcanization molding while maintaining the visibility substantially equal, and to provide a visual effect that was not present in the related art.
[0025]
【The invention's effect】
As described above, in the pneumatic tire of the present invention, on the tire side surface, the first ridge extending in the first direction with respect to the tire meridian, and the second ridge extending in the second direction different from the first direction with respect to the tire meridian. Is formed, and the first ridge and the second ridge intersect. As a result, the decorative body engraved on the side surface of the tire can have an unprecedented visual effect, and can prevent air from entering during vulcanization molding.
[Brief description of the drawings]
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a main part showing a ridge on a side surface of a pneumatic tire according to the present invention, wherein (a) is a front view, (b) is a cross-sectional view along line A, and (c) is a cross-sectional view along line B.
FIG. 2 is a schematic diagram of a main part showing a ridge according to a comparative example.
[Explanation of symbols]
R1 First ridge R2 Second ridge M Tire meridian S Tire side surface
Claims (4)
タイヤ子午線に対して第1方向に延びる第1リッジと、タイヤ子午線に対して前記第1方向と異なる第2方向に延び、標章を表示する第2リッジが刻まれて、
前記第1リッジと前記第2リッジとが交差していることを特徴とする空気入りタイヤ。For pneumatic tires with ridges engraved on the side of the tire,
A first ridge extending in a first direction with respect to the tire meridian, and a second ridge extending in a second direction different from the first direction with respect to the tire meridian and displaying a mark,
A pneumatic tire, wherein the first ridge and the second ridge intersect.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2003140237A JP4229320B2 (en) | 2003-05-19 | 2003-05-19 | Pneumatic tire |
Applications Claiming Priority (1)
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JP2003140237A JP4229320B2 (en) | 2003-05-19 | 2003-05-19 | Pneumatic tire |
Publications (2)
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JP2004338655A true JP2004338655A (en) | 2004-12-02 |
JP4229320B2 JP4229320B2 (en) | 2009-02-25 |
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JP2003140237A Expired - Lifetime JP4229320B2 (en) | 2003-05-19 | 2003-05-19 | Pneumatic tire |
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JP (1) | JP4229320B2 (en) |
Cited By (11)
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WO2006015667A1 (en) * | 2004-08-06 | 2006-02-16 | Continental Aktiengesellschaft | Motor vehicle pneumatic tyre |
WO2006015674A1 (en) * | 2004-08-06 | 2006-02-16 | Continental Aktiengesellschaft | Motor vehicle pneumatic tyre |
US20100000649A1 (en) * | 2006-12-04 | 2010-01-07 | Bridgestone Corporation | Tire |
JP2011037388A (en) * | 2009-08-12 | 2011-02-24 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
JP2011037387A (en) * | 2009-08-12 | 2011-02-24 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
CN102092245A (en) * | 2009-12-11 | 2011-06-15 | 横滨橡胶株式会社 | Pneumatic tire |
WO2013073128A1 (en) * | 2011-11-15 | 2013-05-23 | 横浜ゴム株式会社 | Pneumatic tire |
JP2015214186A (en) * | 2014-05-08 | 2015-12-03 | 東洋ゴム工業株式会社 | Pneumatic tire |
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CN109789739A (en) * | 2016-09-27 | 2019-05-21 | 大陆轮胎德国有限公司 | Vehicle tyre |
WO2020246236A1 (en) | 2019-06-03 | 2020-12-10 | 株式会社ブリヂストン | Tire |
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KR102530621B1 (en) | 2021-01-14 | 2023-05-08 | 한국타이어앤테크놀로지 주식회사 | Tire |
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2003
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Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2006015667A1 (en) * | 2004-08-06 | 2006-02-16 | Continental Aktiengesellschaft | Motor vehicle pneumatic tyre |
WO2006015674A1 (en) * | 2004-08-06 | 2006-02-16 | Continental Aktiengesellschaft | Motor vehicle pneumatic tyre |
US20100000649A1 (en) * | 2006-12-04 | 2010-01-07 | Bridgestone Corporation | Tire |
JP2011037388A (en) * | 2009-08-12 | 2011-02-24 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
JP2011037387A (en) * | 2009-08-12 | 2011-02-24 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
US8631847B2 (en) | 2009-12-11 | 2014-01-21 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
CN102092245A (en) * | 2009-12-11 | 2011-06-15 | 横滨橡胶株式会社 | Pneumatic tire |
DE102010061740B4 (en) * | 2009-12-11 | 2016-04-28 | The Yokohama Rubber Co., Ltd. | tire |
WO2013073128A1 (en) * | 2011-11-15 | 2013-05-23 | 横浜ゴム株式会社 | Pneumatic tire |
JP2013103631A (en) * | 2011-11-15 | 2013-05-30 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
CN103930287A (en) * | 2011-11-15 | 2014-07-16 | 横滨橡胶株式会社 | Pneumatic tire |
JP2015214186A (en) * | 2014-05-08 | 2015-12-03 | 東洋ゴム工業株式会社 | Pneumatic tire |
US10377187B2 (en) | 2014-05-08 | 2019-08-13 | Toyo Tire Corporation | Pneumatic tire |
CN109789739A (en) * | 2016-09-27 | 2019-05-21 | 大陆轮胎德国有限公司 | Vehicle tyre |
EP3427977A1 (en) * | 2017-07-11 | 2019-01-16 | Continental Reifen Deutschland GmbH | Vehicle tyre with side wall hatching |
WO2020246236A1 (en) | 2019-06-03 | 2020-12-10 | 株式会社ブリヂストン | Tire |
CN113874227A (en) * | 2019-06-03 | 2021-12-31 | 株式会社普利司通 | Tyre for vehicle wheels |
EP3978276A4 (en) * | 2019-06-03 | 2023-06-21 | Bridgestone Corporation | Tire |
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