JPH02293206A - Pneumatic tire having directive tread pattern - Google Patents
Pneumatic tire having directive tread patternInfo
- Publication number
- JPH02293206A JPH02293206A JP1114047A JP11404789A JPH02293206A JP H02293206 A JPH02293206 A JP H02293206A JP 1114047 A JP1114047 A JP 1114047A JP 11404789 A JP11404789 A JP 11404789A JP H02293206 A JPH02293206 A JP H02293206A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- tread pattern
- pneumatic tire
- tread
- performance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009434 installation Methods 0.000 abstract description 4
- 208000035874 Excoriation Diseases 0.000 abstract 4
- 238000005299 abrasion Methods 0.000 abstract 4
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
Classifications
-
- 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
- B60C13/001—Decorating, marking or the like
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、指向性をもたせたトレッドパターンを有す
る空気入りタイヤに関し、該タイヤの指向性に応じた性
能をタイヤ摩耗の末期に至るまで効果的に発揮させよう
とするものである。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a pneumatic tire having a directional tread pattern, and the present invention relates to a pneumatic tire having a directional tread pattern, and the present invention relates to a pneumatic tire having a directional tread pattern. The aim is to make the most of this.
（従来の技術）
例えば氷雪路面等や悪路等を走行するタイヤではトレッ
ドの接地面における例えば駆動力や制動力などの接線入
力に対しその特性に差をもつようにトレッドパターンを
調整することで、走行性能を向上させることが可能であ
るが、かかるタイヤは目視による特性差の判別が難しい
とき、適切な車軸への適用ができずにその性能を充分に
発揮させることができない場合がある。(Prior art) For example, in tires that run on icy and snowy roads, rough roads, etc., the tread pattern is adjusted to have different characteristics in response to tangential inputs such as driving force and braking force on the contact surface of the tread. Although it is possible to improve driving performance, when it is difficult to visually distinguish the difference in characteristics of such a tire, it may not be possible to apply it to an appropriate axle and the tire may not be able to fully demonstrate its performance.
例えば、リア・ドライブ方式のような車両では、一般に
タイヤに負荷される接線入力が、車両の前軸で制動力主
体、後軸で駆動力主体となるが、このような車両に上記
のような指向性のあるタイヤとして例えばタイヤの回転
の一方が制動性の改善に、逆の回転が駆動性の改善に主
眼をおいたトレッドパターンを有するタイヤの場合、後
軸のタイヤについては前軸に装着したタイヤとはタイヤ
の回転が逆に反転する向きで装着する必要がある。For example, in a rear-drive vehicle, the tangential input applied to the tires generally consists of mainly braking force on the front axle of the vehicle and mainly driving force on the rear axle. For example, in the case of a directional tire, such as a tire with a tread pattern where one side of the tire's rotation focuses on improving braking performance and the opposite rotation focuses on improving drivability, the tire on the rear axle is attached to the front axle. It is necessary to install the tires in such a way that the rotation of the tires is reversed.
ところが、このようなトレッドパターンの指向性を無視
してタイヤが装着された場合には該タイヤの性能を充分
発揮させることができない。However, if a tire is mounted without regard to the directivity of the tread pattern, the performance of the tire cannot be fully demonstrated.
とりわけ重荷重用の車両等では新品の上記の如きタイヤ
を前軸に装着して期待の制動性能に寄与させ、ある程度
摩耗した段階ではその前軸のタイヤを後軸に付け替える
際、タイヤの回転の向きを反転させて再装着をしなけれ
ば後軸において期待する駆動性能の改善が得られない場
合、このような装着の向きの判別は、必ずしも容易でな
い。Particularly in heavy-duty vehicles, a new tire like the one above is installed on the front axle to contribute to the expected braking performance, and once the front axle tire has worn out to a certain extent, when replacing the front axle tire with the rear axle, the direction of rotation of the tire is changed. If the expected improvement in drive performance cannot be obtained at the rear axle unless it is reversed and reinstalled, it is not always easy to determine the orientation of the installation.
（発明が解決しようとする課題）
この発明は、指向性トレッドパターンをもつタイヤにお
いて、タイヤの接地面での接線入力の方向による特性差
を簡便に識別しそのタイヤの性能を車両の前軸、後軸で
効果的に発揮させることができる空気入りタイヤを提案
することを目的とする。(Problem to be Solved by the Invention) The present invention is an object of the present invention, in a tire having a directional tread pattern, by easily identifying the difference in characteristics depending on the direction of tangential input on the tire's ground contact surface, and evaluating the performance of the tire on the front axle of the vehicle. The purpose is to propose a pneumatic tire that can be effectively used on the rear axle.
（課題を解決するための手段）
この発明は、トレッドの全表面に溝部とこれによって隔
てられた陸部とを配設してなり、接地面での接線入力の
方向による特性の異なるトレッドパターンを有する空気
入りタイヤにおいて、車両への装着姿勢における外側の
サイドウォール表面に、タイヤの使用段階に応じて装着
位置を変更させる識別指標を設けるか、またはタイヤ摩
耗初期と摩耗中期、あるいは摩耗末期におけるタイヤの
回転方向を異なるものとし、トレッド端部側面にタイヤ
回転方向を表示した矢印をタイヤ径方向にて２段以上に
表示した指向性トレッドパターンをもつ空気入りタイヤ
である。(Means for Solving the Problems) This invention provides a tread pattern that has different characteristics depending on the direction of tangential input on the ground contact surface by disposing a groove portion and a land portion separated by the groove portion on the entire surface of the tread. For pneumatic tires with a tire, an identification indicator is provided on the outer sidewall surface of the tire to change the mounting position depending on the stage of use of the tire when mounted on a vehicle, or an identification indicator is provided to change the mounting position depending on the stage of use of the tire. This pneumatic tire has a directional tread pattern in which the rotation directions of the tires are different, and arrows indicating the tire rotation directions are displayed in two or more stages in the tire radial direction on the side surface of the tread end.
第１図にこの発明に従う空気入りタイヤの側面を車両へ
の装着姿勢における外側の要部について示し、図におけ
る１はトレッド表面ｔの溝部、２は同じく陸部であり、
この溝部１および陸部２はトレッドの全表面に、タイヤ
の接地面での接線入力の方向によって特性が異なる指向
性トレッドパターンを形成する。また３はサイドウォー
ルＳに設けた識別指標であり、この指標３に従って使用
段階（摩耗状況などによる）に応じてタイヤを適切な車
軸に装着する。FIG. 1 shows the side surface of the pneumatic tire according to the present invention with respect to the outer main parts when it is mounted on a vehicle. In the figure, 1 is the groove part on the tread surface t, and 2 is the land part,
The groove portions 1 and the land portions 2 form a directional tread pattern on the entire surface of the tread, the characteristics of which vary depending on the direction of tangential input on the tire's contact surface. Further, reference numeral 3 is an identification indicator provided on the sidewall S, and according to this indicator 3, the tire is mounted on an appropriate axle depending on the stage of use (depending on the state of wear, etc.).
第２図に新品時にはトレッド表面に近い指標３白抜き矢
印に従うタイヤの回転となるように車軸へ装着し、トレ
ッドの摩耗が進行して破線にまで達した時点で指標３′
（黒矢印）に従ってタイヤの回転を反転させる形式の
例を示す。Figure 2 shows that when new, the tire is mounted on the axle so that the tire rotates according to the white arrow with index 3 near the tread surface, and when the tread wear progresses and reaches the broken line, index 3'
An example of a format in which the rotation of the tire is reversed according to the (black arrow) is shown.
なお、上掲第１図、第２図に示したタイヤの内部構造は
一般のラジアルタイヤと同様であってここでは図示を省
略した。The internal structure of the tire shown in FIGS. 1 and 2 above is the same as that of a general radial tire, and is not shown here.
（作 用）
指向性トレッドパターンをもつ空気入りタイヤをリア・
ドライブ方式になる車両へ適用した場合を例にとると、
制動性を重視する前軸には第３図（ａ）に示すようにト
レッド表面もの陸部２を隔てる溝部１を車両の進行側に
傾斜した向きにして陸部のエッジｅ．を路面に食い込ま
せることができるように、一方駆動力を重視する後軸に
は第３図（ｂ）に示すようにトレッド表面ｔの溝部１を
車両の進行とは逆向きにして、エッジｅ２を路面に食い
込ませることができるように、それぞれの車軸に装着す
る必要がある。(Function) A pneumatic tire with a directional tread pattern is installed on the rear
For example, when applied to a vehicle with a drive system,
As shown in FIG. 3(a), the front axle, which emphasizes braking performance, has grooves 1 separating the land portions 2 on the tread surface so as to be inclined toward the vehicle's traveling side, and the edges of the land portions e. On the other hand, on the rear axle where driving force is important, the groove 1 on the tread surface t is oriented in the opposite direction to the direction of the vehicle's movement, and the edge e2 It must be mounted on each axle so that it can dig into the road surface.
ところでタイヤのもつ指向性の判別を誤って車両の後軸
に前軸と同じ向きでタイヤを装着した場合、後軸におい
て高い駆動力を得ることはできず、一方、前軸に後軸と
同じ向きでタイヤを装着した場合には制動性の劣化が避
けられないのは明らかである。By the way, if you make a mistake in determining the directivity of the tires and attach the tires to the rear axle of the vehicle in the same direction as the front axle, you will not be able to obtain high driving force on the rear axle, while the front axle will have the same orientation as the rear axle. It is clear that if tires are mounted in the wrong direction, deterioration in braking performance is inevitable.
とくに車体重量が重い車両などでは前述したように前軸
に新品のタイヤを、後軸にある程度磨耗した前軸のタイ
ヤを装着して使用する場合が多く、このような場合には
反転して装着しなければ期待した駆動性能を得ることが
できない。しかし摩耗が進行した状態におけるタイヤの
指向性を判別するのはなおさら難しい。As mentioned above, especially on vehicles with heavy vehicle weight, new tires are often installed on the front axle and slightly worn front tires are installed on the rear axle.In such cases, the tires are installed upside down. Otherwise, you will not be able to obtain the expected driving performance. However, it is even more difficult to determine the directionality of a tire in a state of advanced wear.
この発明においては、車軸への装着姿勢におけるタイヤ
のサイドウォールＳに特性差の識別指標３を設けるよう
にしたので、この識別指標３に従うタイヤの回転となる
ように車軸に装着すれば従来懸念された装着の間違いを
起こすうれいがな《、したがってタイヤのもつ性能を効
果的に発揮させる・ことができる。In this invention, since the identification index 3 of the characteristic difference is provided on the sidewall S of the tire in the mounting position on the axle, if the tire is mounted on the axle so that the rotation of the tire follows this identification index 3, the conventional concern will be solved. There is no risk of making mistakes in the installation of the tire, so the performance of the tire can be effectively demonstrated.
なお、上掲第２図に示したように識別指標３をサイドウ
ォールＳのリムから最も遠い位置で上下に互いに逆向き
に配設した場合には装着の間違いを防止するのはもちろ
ん、タイヤの交換時期を的確に示すこともできる利点が
ある。As shown in Fig. 2 above, if the identification indicators 3 are arranged in opposite directions vertically at the farthest position from the rim of the sidewall S, this will not only prevent incorrect installation, but also prevent the tire from being installed incorrectly. It also has the advantage of being able to accurately indicate when to replace it.
（実施例）
制動性、駆動性の改善に役立つ第３図に示した如き構成
になる指向性トレッドパターンをもつサイズ１０．０Ｏ
Ｒ２０のタイヤに、各性能が識別できるようにこの発明
に従いサイドウォールＳに性能差の識別指標を設け、こ
のタイヤを下記に示すようなケースで最大積載量の荷物
を積載した７ｔ積荷物車に装着した場合での圧雪路にお
ける制動性および駆動性について調査した。(Example) Size 10.00 with a directional tread pattern configured as shown in Figure 3, which is useful for improving braking performance and drivability.
In accordance with the present invention, the R20 tire is provided with performance difference identification indicators on the sidewall S so that each performance can be identified, and this tire is applied to a 7t cargo vehicle loaded with the maximum load capacity in the case shown below. We investigated the braking performance and driving performance on snow-packed roads when equipped.
なお、この調査では制動性は速度４０ｋｍ／ｈからの制
動距離を、駆動性は索引力を計測した。In this investigation, braking performance was measured by braking distance from a speed of 40 km/h, and drivability was measured by traction force.
その結果を表−１に併せて示す如く、識別指標にしたが
って車両の前軸、後軸に装着した場合では、基準タイヤ
として用いた第４図に示す如き断面形状になる無指向性
の従来のタイヤはもとより、車両の前軸後軸に第３図（
ａ）のように装着した比較例１、車両の前軸後軸に第３
図（ｂ）のように装着した比較例２の如き、何れか一方
の車軸に識別指標が逆向きとなるように装着した場合と
比べて高い性能が発揮されることが確かめられた。The results are shown in Table 1. When mounted on the front and rear axles of a vehicle according to the identification index, the non-directional conventional tire has a cross-sectional shape as shown in Figure 4, which was used as a reference tire. In addition to the tires, the front and rear axles of the vehicle are equipped with
Comparative example 1 installed as in a), the third
It was confirmed that higher performance was exhibited compared to the case where the identification indicator was mounted on one of the axles in the opposite direction, such as Comparative Example 2, which was mounted as shown in Figure (b).
表−１
また、識別指標に従って前記車両の前輪に装着し正規荷
重のもとで３万ｈ走行後このタイヤをやはり識別指標に
従って後軸に装着した場合と、これを無視した場合の制
動性および駆動性について調査したところ、表−２に示
すように制動性、駆動性について格段の差がみられた。Table 1 Also, the braking performance and braking performance when the tire is mounted on the front wheels of the vehicle according to the identification index and after running for 30,000 hours under the normal load, are mounted on the rear axle according to the identification index, and when this tire is ignored. When we investigated the drivability, we found a significant difference in braking performance and drivability, as shown in Table 2.
表−２
（発明の効果）
か《してこの発明によれば、指向性トレッドパターンを
もつ空気入りタイヤを性能差に応じて適切なタイヤ回転
となるように車軸に確実に装着して該タイヤのもつ性能
を有利に発揮させることができる。Table 2 (Effects of the Invention) Thus, according to the present invention, a pneumatic tire with a directional tread pattern is securely attached to an axle so that the tire rotates appropriately according to the difference in performance. It is possible to take advantage of the performance of the
第１図、第２図はこの発明の構成説明図、第３図（ａ）
（ｂ）は指向性トレッドパターンをもった空気入りタイ
ヤの要部拡大図、
第４図は従来タイヤの要部拡大図である。
１・・・溝部 ２・・・陸部３・・・識別指
標 ｔ・・・トレッドＳ・・・サイドウォール
第１
図
３油鍔ｌ廂掠
第２図
第３図
（ａ）
（ｂ）Figures 1 and 2 are explanatory diagrams of the configuration of this invention, and Figure 3 (a)
(b) is an enlarged view of the main parts of a pneumatic tire with a directional tread pattern, and Figure 4 is an enlarged view of the main parts of a conventional tire. 1...Groove portion 2...Land portion 3...Identification index t...Tread S...Sidewall No. 1 Fig. 3 Oil collar Fig. 2 Fig. 3 (a) (b)
Claims (1)
陸部とを配設してなり、接地面での接線入力の方向によ
る特性の異なるトレッドパターンを有する空気入りタイ
ヤにおいて、サイドウォール表面に、タイヤの摩耗段階 に応じて装着位置を変更させる識別指標を設けたことを
特徴とする指向性トレッドパターンをもつ空気入りタイ
ヤ。 ２、トレッドの全表面に溝部とこれによって隔てられた
陸部とを配設してなり、接地面での接線入力の方向によ
る特性の異なるトレッドパターンを有する空気入りタイ
ヤにおいて、サイドウォール表面に、タイヤの摩耗段階 に応じて正の回転方向を変更させる識別指標を設けたこ
とを特徴とする指向性トレッドパターンをもつ空気入り
タイヤ。 ３、トレッドの全表面に溝部とこれによって隔てられた
陸部とを配設してなり、接地面での接線入力の方向によ
る特性の異なるトレッドパターンを有する空気入りタイ
ヤにおいて、サイドウォール表面に、タイヤの装着位置 に応じて正の回転方向を変更させる識別指標を設けたこ
とを特徴とする指向性トレッドパターンをもつ空気入り
タイヤ。[Claims] 1. In a pneumatic tire having a tread pattern in which grooves and land portions separated by the grooves are arranged on the entire surface of the tread, and whose characteristics differ depending on the direction of tangential input on the ground contact surface. , a pneumatic tire with a directional tread pattern, characterized in that an identification indicator is provided on the sidewall surface to change the mounting position according to the wear stage of the tire. 2. In a pneumatic tire having a tread pattern in which grooves and land portions separated by the grooves are arranged on the entire surface of the tread, and whose characteristics differ depending on the direction of tangential input on the ground contact surface, the sidewall surface has: A pneumatic tire with a directional tread pattern characterized by having an identification index that changes the positive rotation direction depending on the wear stage of the tire. 3. In a pneumatic tire having a tread pattern in which grooves and land portions separated by the grooves are arranged on the entire surface of the tread, and whose characteristics differ depending on the direction of tangential input on the ground contact surface, the sidewall surface has: A pneumatic tire with a directional tread pattern characterized by having an identification index that changes the positive rotation direction depending on the mounting position of the tire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1114047A JPH02293206A (en) | 1989-05-09 | 1989-05-09 | Pneumatic tire having directive tread pattern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1114047A JPH02293206A (en) | 1989-05-09 | 1989-05-09 | Pneumatic tire having directive tread pattern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02293206A true JPH02293206A (en) | 1990-12-04 |
Family
ID=14627705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1114047A Pending JPH02293206A (en) | 1989-05-09 | 1989-05-09 | Pneumatic tire having directive tread pattern |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02293206A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2005233105B2 (en) * | 2004-04-12 | 2012-01-19 | Bridgestone Americas Tire Operations, Llc | Use of colored indicia on tires as a designator |
| AU2011265592B2 (en) * | 2004-04-12 | 2012-08-02 | Bridgestone Americas Tire Operations, Llc | Use of colored indicia on tires as a designator |
-
1989
- 1989-05-09 JP JP1114047A patent/JPH02293206A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2005233105B2 (en) * | 2004-04-12 | 2012-01-19 | Bridgestone Americas Tire Operations, Llc | Use of colored indicia on tires as a designator |
| AU2011265592B2 (en) * | 2004-04-12 | 2012-08-02 | Bridgestone Americas Tire Operations, Llc | Use of colored indicia on tires as a designator |
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