JPS6222402Y2 - - Google Patents
Info
- Publication number
- JPS6222402Y2 JPS6222402Y2 JP1981184893U JP18489381U JPS6222402Y2 JP S6222402 Y2 JPS6222402 Y2 JP S6222402Y2 JP 1981184893 U JP1981184893 U JP 1981184893U JP 18489381 U JP18489381 U JP 18489381U JP S6222402 Y2 JPS6222402 Y2 JP S6222402Y2
- Authority
- JP
- Japan
- Prior art keywords
- cross
- tire
- grooves
- sectional
- circumferential grooves
- 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.)
- Expired
Links
- 230000007704 transition Effects 0.000 claims description 5
- 239000011324 bead Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Description
【考案の詳細な説明】
本考案はラリー用空気入りタイヤに関し、さら
に詳しくは、冬期ラリーにおいて良好な操縦安定
性特に制動性と駆動性を改善したラリー用空気入
りタイヤに関するものである。[Detailed Description of the Invention] The present invention relates to a pneumatic tire for rally use, and more particularly to a pneumatic tire for rally use that has good handling stability, particularly improved braking performance and drive performance, in winter rallies.
従来冬期ラリー用タイヤには一般用スノータイ
ヤを使用したり、非積雪地用ラリータイヤを流用
したりしていた。 Conventionally, tires for winter rallies have been general snow tires or rally tires for non-snowy areas.
しかしラリー競技のレベル向上に伴ない、冬期
ラリー（氷上及び雪上のラリー）においてもより
高度なタイヤ特性を求められるようになつてき
た。 However, as the level of rally competition has improved, even winter rallies (on ice and snow) have come to require more advanced tire characteristics.
一般用スノータイヤは除雪路での走行もかなり
大きな部分を占めるため、乾燥した舗装路での操
縦安定性，騒音及び偏摩耗を考慮した接地面内で
横溝ができるだけ横一列に並ばないようなデザイ
ンとなつているが、これは氷上及び雪上において
は性能低下の原因となるため、如何に妥協した特
性とするかに注意が向けられている。 General-purpose snow tires spend a considerable amount of time driving on snow plowed roads, so they are designed so that the lateral grooves are not lined up horizontally in the contact patch as much as possible, taking into consideration steering stability, noise, and uneven wear on dry paved roads. However, since this causes performance degradation on ice and snow, attention is being focused on how to compromise on the characteristics.
一方、非積雪地用ラリータイヤは、不整地にお
ける耐久耐摩性を向上させるために、ブロツク剛
性を高く設定しており、スノータイヤとしては不
向きである。 On the other hand, rally tires for non-snowy terrain have high block rigidity in order to improve durability and wear resistance on uneven terrain, making them unsuitable as snow tires.
以上述べた如く、冬期ラリーにおいて高度の操
縦安定性を得るためには、一般用スノータイヤや
ラリー用タイヤの転用では不十分であつた。 As mentioned above, in order to obtain a high degree of steering stability in winter rallies, it has not been sufficient to repurpose general snow tires or rally tires.
そこで本考案は冬期ラリーにおいて良好な操縦
安定性特に制動性と駆動性に優れた性能を有する
ラリー用空気入りタイヤを提供することを目的と
するものである。 SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide a pneumatic rally tire that exhibits good handling stability, particularly excellent performance in braking and driving performance, in winter rallies.
そしてその特徴とするところは、トレツド中央
部に設けた中央周方向溝と、トレツド中央部とシ
ヨルダー部間に設けた左右一対の外側周方向溝
と、これら３本の周方向溝に連結する断面方向溝
が形成するブロツクデザインの空気入りタイヤに
おいて、前記各周方向溝を介して前記断面方向溝
をほぼ断面方向に連続させると共に、断面方向に
エツヂ量が多いブロツクを赤道面に対してそれぞ
れジグザグ状に配置することにより、特に氷雪路
での制動性及び駆動性を著しく向上せしめた点に
ある。 Its features include a central circumferential groove provided in the center of the tread, a pair of left and right outer circumferential grooves provided between the center of the tread and the shoulder, and a cross section that connects these three circumferential grooves. In a pneumatic tire with a block design formed by directional grooves, the cross-sectional grooves are made to continue substantially in the cross-sectional direction via the respective circumferential grooves, and the blocks having a large amount of edge in the cross-sectional direction are arranged in a zigzag pattern with respect to the equatorial plane. By arranging them in the same manner, braking performance and driving performance, especially on icy and snowy roads, are significantly improved.
以下本考案を実施例により図面を参照して詳細
に説明する。 Hereinafter, the present invention will be explained in detail by way of examples with reference to the drawings.
第１図は本考案のラリー用空気入りタイヤのト
レツド部の説明図、第２図は第１図Ｘ−Ｘ線断面
説明図、第３図は本考案のラリー用空気入りタイ
ヤのトレツド部の一部を示す平面視説明図であ
る。 Fig. 1 is an explanatory diagram of the tread portion of the pneumatic rally tire of the present invention, Fig. 2 is an explanatory cross-sectional view taken along the line X-X of Fig. 1, and Fig. 3 is an explanatory diagram of the tread portion of the pneumatic rally tire of the present invention. It is a planar view explanatory view which shows a part.
本ラリー用空気入りタイヤ１は本実施例におい
て第２図に示すように、一対のビード部２とこの
ビード部２につながるサイドウオール部３と、こ
のサイドウオール部３の間にまたがりほぼ円筒状
をなすトレツド部４とを備えており、前記各ビー
ド部２はその先端位置にビードワイヤ５が配置さ
れている。また本実施例においては、前記各ビー
ド部２間を結ぶタイヤ断面方向の繊維コードから
なるカーカス層６を有し、（ただし前記繊維コー
ドは２層のカーカス層６を用いる場合、タイヤ周
方向に対し、70゜〜90゜の角度を取り得る）また
前記トレツド部４には、タイヤの周方向に対し、
小さい角度で交わるよう配列された非伸張性コー
ド、例えばスチールコードのプライの複数枚を重
ね合わせたものよりなるベルト層７をトレツド部
４の巾に配置し、これらベルト層７の周囲全体を
外被ゴム８で覆つている。 As shown in FIG. 2 in this embodiment, the pneumatic rally tire 1 has a pair of bead portions 2, a sidewall portion 3 connected to the bead portions 2, and a substantially cylindrical shape spanning between the sidewall portions 3. Each bead portion 2 has a bead wire 5 disposed at its tip. Further, in this embodiment, there is a carcass layer 6 made of fiber cords in the cross-sectional direction of the tire that connects each of the bead portions 2 (However, when using two carcass layers 6, the fiber cords extend in the tire circumferential direction In contrast, the tread portion 4 may have an angle of 70° to 90°) with respect to the circumferential direction of the tire.
A belt layer 7 consisting of a plurality of plies of non-extensible cords, for example steel cords, arranged so as to intersect at a small angle, is placed over the width of the tread portion 4, and the entire periphery of these belt layers 7 is removed. It is covered with a rubber covering 8.
さらに前記トレツド部４の踏面は、タイヤ赤道
面上に位置しトレツド中央部Ａに設けられた中央
周方向溝９と、トレツド中央部Ａとシヨルダー部
Ｂのほぼ中間に位置する左右一対の外側周方向溝
１０と、前記中央周方向溝９と外側周方向溝１０
をタイヤ断面方向に結ぶ多数の断面方向溝１１と
を備えている。 Further, the tread surface of the tread portion 4 includes a central circumferential groove 9 located on the tire equatorial plane and provided in the tread center portion A, and a pair of left and right outer circumferential grooves located approximately midway between the tread center portion A and the shoulder portion B. a directional groove 10, the central circumferential groove 9 and the outer circumferential groove 10.
The tire is provided with a large number of cross-sectional grooves 11 that connect the tire cross-sectional direction.
そして本考案において前記各周方向溝９及び１
０は、同一ピツチＰ内においてそれぞれ前記周方
向溝９及び１０の溝幅t1，t2とほぼ同じ幅だけタ
イヤ断面方向にずれたタイヤ赤道面に平行な２つ
の直線部９１，１０１と、この直線部９１，１０
１を連結する移行部９２，１０２からなる千鳥形
状をなしており、また前記左右一対の外側周方向
溝１０は、前記中央周方向溝９に対して、相互に
同一方向にほぼ1/2ピツチずれており、左右同一
形状をなしている。さらに断面方向溝１１は移行
部９２，１０２と直線部９１，１０１の接合部付
近に連続している。断面方向溝１１は周方向溝
９，１０と同じ溝巾t1，t2に構成されている。 In the present invention, each of the circumferential grooves 9 and 1
0 is two straight portions 91 and 101 parallel to the tire equatorial plane that are shifted in the tire cross-sectional direction by approximately the same width as the groove widths t 1 and t 2 of the circumferential grooves 9 and 10, respectively, within the same pitch P; This straight part 91, 10
1, and the pair of left and right outer circumferential grooves 10 are arranged at approximately 1/2 pitch in the same direction with respect to the central circumferential groove 9. The left and right sides have the same shape. Further, the cross-sectional groove 11 is continuous near the joint between the transition portions 92, 102 and the straight portions 91, 101. The cross-sectional grooves 11 are configured to have the same groove widths t 1 and t 2 as the circumferential grooves 9 and 10 .
この結果、タイヤ周方向にほぼ1/2ピツチごと
に３本の周方向溝９，１０に連結した断面方向溝
１１がほぼ横一列に配置されることになる。 As a result, the cross-sectional grooves 11 connected to the three circumferential grooves 9 and 10 are arranged approximately in a horizontal row at approximately every 1/2 pitch in the tire circumferential direction.
したがつて、断面方向溝１１が横一列に配置さ
れ、タイヤ断面方向のエツジ量が多いブロツク１
２が、赤道面を中心にジグザグ状に駆動性，制動
性に大きい効果を与えるようトレツド中央部に配
置されるので、雪路における周方向へのグリツプ
力、即ち駆動力及び制動力が最大となり駆動力，
制動力にすぐれた冬期ラリー用空気タイヤが得ら
れる。しかしながら、乾燥した舗装路において
は、走行時のタイヤ騒音が気になるが、本考案は
冬期ラリー用に供せられるものであり、氷雪路で
の性能を最大限に発揮することを目的とするた
め、タイヤ騒音については実用上の問題は発生し
ない。 Therefore, the cross-sectional grooves 11 are arranged horizontally in a row, and the block 1 has a large amount of edges in the tire cross-sectional direction.
2 is placed in the center of the tread in a zigzag pattern centered on the equatorial plane to have a great effect on driving and braking performance, so the gripping force in the circumferential direction on snowy roads, that is, the driving force and braking force, is maximized. driving force,
A pneumatic tire for winter rallies with excellent braking power can be obtained. However, on dry paved roads, tire noise when driving is a concern, but this invention is intended for winter rallies and is intended to maximize performance on icy and snowy roads. Therefore, there are no practical problems regarding tire noise.
また、各周方向溝９，１０の溝深さＨに対し、
各断面方向溝１１の溝深さh1を、h1＝0.80〜
0.92Hとすることにより、各周方向溝９，１０と
各断面方向溝１１により形成される各ブロツクの
剛性が断面方向に対し周方向が高くなるため、走
行中のブロツクの動きも断面方向に対し周方向が
少なくなり、氷雪路における良好な操縦性及び安
定性を得ることができる。 Moreover, with respect to the groove depth H of each circumferential groove 9, 10,
The groove depth h 1 of each cross-sectional groove 11 is h 1 =0.80~
By setting it to 0.92H, the rigidity of each block formed by the circumferential grooves 9 and 10 and the cross-sectional grooves 11 is higher in the circumferential direction than in the cross-sectional direction, so the movement of the block during traveling is also less in the cross-sectional direction. On the other hand, the circumferential direction is reduced, and good maneuverability and stability on icy and snowy roads can be obtained.
なお前記断面方向溝１１の溝深さh1が周方向溝
９，１０の溝深さＨの0.80未満だと柔かい氷雪路
における制動性と駆動性が低下して好ましくない
し、0.92を超えるとかたい氷雪路での制動性，駆
動性が低下するので好ましくない。 It should be noted that if the groove depth h 1 of the cross-sectional groove 11 is less than 0.80 of the groove depth H of the circumferential grooves 9 and 10, braking performance and drivability on soft ice and snow roads will deteriorate, which is undesirable, and if it exceeds 0.92, it will become hard. This is undesirable because braking performance and driving performance on icy and snowy roads deteriorate.
次に第３図に示す本考案のタイヤのトレツド部
の一部について説明する。 Next, a part of the tread portion of the tire of the present invention shown in FIG. 3 will be explained.
第３図においては、第１図において説明した赤
道面に平行な直線部９１及び移行部９２並びに断
面方向溝１１で囲まれる赤道面に対しジグザグ状
に配置された断面方向のエツヂ量が多い各ブロツ
ク１２を、周方向に平行な溝１３によつてブロツ
ク片１２１と１２２とに２分し、この２分された
各ブロツク片１２１と１２２とが１ピツチＰ内に
左右交互に配置してある。そしてこの２分した各
ブロツク片１２１と１２２との面積比は、本実施
例において中央部Ａ側のブロツク片１２１を１と
すると、シヨルダー部Ｂ側のブロツク片１２２が
２の割合になるように成型されている。 In FIG. 3, each section having a large amount of edge in the cross-sectional direction is arranged in a zigzag manner with respect to the equatorial plane surrounded by the straight line portion 91 parallel to the equatorial plane, the transition portion 92, and the cross-sectional groove 11 described in FIG. The block 12 is divided into two block pieces 121 and 122 by a groove 13 parallel to the circumferential direction, and the two divided block pieces 121 and 122 are arranged alternately on the left and right sides within one pitch P. . In this embodiment, the area ratio of each of the two divided block pieces 121 and 122 is such that if the block piece 121 on the center part A side is 1, the area ratio of the block piece 122 on the shoulder part B side is 2. It is molded.
上述したように本実施例は、赤道面に対しジグ
ザグ状に配置された断面方向のエツヂ量が多い最
大の面積を有するブロツク１２を、周方向に２分
割し、かつ中央部Ａ側のブロツク片１２１の面積
をシヨルダー部Ｂ側のブロツク片１２２と比較し
て小さく設定することにより、つまり断面方向の
エツヂ量を少なくしないでブロツク１２の周方向
のブロツク剛性を弱めるとともに中央周方向溝側
のブロツク片１２１を動きやすくして、トレツド
中央部附近の溝内につまつた雪の排雪作用を容易
にすることにより、柔かい氷雪路における駆動
性，制動性をさらに高めたものである。 As described above, in this embodiment, the block 12 having the largest area with a large amount of edge in the cross-sectional direction, which is arranged in a zigzag pattern with respect to the equatorial plane, is divided into two in the circumferential direction, and the block piece on the central part A side is divided into two parts in the circumferential direction. By setting the area of the block piece 121 smaller than that of the block piece 122 on the shoulder portion B side, in other words, the circumferential block rigidity of the block 12 is weakened without reducing the edge amount in the cross-sectional direction, and the block piece on the center circumferential groove side is By making the piece 121 more movable and facilitating the removal of snow that has accumulated in the groove near the center of the tread, driving performance and braking performance on soft icy and snowy roads are further improved.
本考案は上述したように、トレツド中央部に設
けた中央周方向溝と、トレツド中央部とシヨルダ
ー部間に設けた左右一対の外側周方向溝と、これ
ら３本の周方向溝に連結する断面方向溝が形成す
るブロツクデザインの空気入りタイヤにおいて、
前記各周方向溝を介して前記断面方向溝をほぼ断
面方向に連続させると共に、断面方向にエツヂ量
が多いブロツクを赤道面に対してそれぞれジグザ
グ状に配置したから、冬期ラリーにおいて良好な
操縦安定性、特に制動性と駆動性に優れた性能を
有する冬期ラリー用空気入りタイヤを得ることが
できる。 As described above, the present invention consists of a central circumferential groove provided at the center of the tread, a pair of left and right outer circumferential grooves provided between the center of the tread and the shoulder, and a cross section connected to these three circumferential grooves. In pneumatic tires with a block design formed by directional grooves,
The cross-sectional grooves are continuous in the cross-sectional direction via the respective circumferential grooves, and blocks with a large amount of edge in the cross-sectional direction are arranged in a zigzag shape with respect to the equatorial plane, so that good steering stability is achieved in winter rallies. It is possible to obtain a pneumatic tire for winter rallies that has excellent performance, especially braking performance and driving performance.
第１図は本考案のラリー用空気入りタイヤのト
レツド部の説明図、第２図は第１図Ｘ−Ｘ線断面
説明図、第３図は本考案のラリー用空気入りタイ
ヤのトレツド部の一部を示す平面視説明図であ
る。
９……中央周方向溝、１０……外側周方向溝、
１１……断面方向溝、９１，１０１……直線部、
９２，１０２……移行部、Ａ……トレツド中央
部、Ｂ……シヨルダー部、Ｐ……ピツチ、１３…
…タイヤ周方向に平行な溝、１２１，１２２……
ブロツク片。
Fig. 1 is an explanatory diagram of the tread portion of the pneumatic rally tire of the present invention, Fig. 2 is an explanatory cross-sectional view taken along the line X-X of Fig. 1, and Fig. 3 is an explanatory diagram of the tread portion of the pneumatic rally tire of the present invention. It is a planar view explanatory view which shows a part. 9... Central circumferential groove, 10... Outer circumferential groove,
11... Cross-sectional direction groove, 91, 101... Straight part,
92, 102...Transition part, A...Tread center part, B...Shoulder part, P...Pitch, 13...
... Grooves parallel to the tire circumferential direction, 121, 122...
Block piece.
Claims (1)
トレツド中央部Ａとシヨルダー部Ｂ間に設けた左
右一対の外側周方向溝１０と、これら３本の各周
方向溝９，１０に連結する断面方向溝１１とで形
成するブロツクからなるトレツドパターンを備え
た空気入りタイヤにおいて、前記３本の各周方向
溝９，１０は、同一ピッチＰ内にてそれぞれ前記
各周方向溝９，１０の溝幅t1，t2とほぼ同じ幅だ
けタイヤ断面方向にずれたタイヤ赤道面に平行な
２つの直線部９１，１０１と該各直線部９１，１
０１を連結する各移行部９２，１０２からなる千
鳥形状に配置すると共に、前記左右一対の外側周
方向溝１０は、前記中央周方向溝９に対して相互
に同一方向にほぼ1/2ピツチずれて同一形状に配
置され、また前記断面方向溝１１は、前記各周方
向溝９，１０の各直線部９１，１０１と各移行部
９２，１０２の接合部附近に連結してタイヤ断面
方向にほぼ並んで配置されており、さらに前記各
周方向溝９，１０及び各断面方向溝１１によつて
形成されるタイヤ断面方向に対してエツヂ量が多
い各ブロツク１２を、タイヤ赤道面を中心として
ジグザグ状に配置し、前記ブロツク１２をタイヤ
周方向に平行な溝１３によつてブロツク片１２１
と１２２とに分割したことを特徴とするラリー用
空気入りタイヤ。 A central circumferential groove 9 provided in the tread central portion A;
A tread pattern consisting of blocks formed by a pair of left and right outer circumferential grooves 10 provided between the tread center part A and shoulder part B, and cross-sectional grooves 11 connected to these three circumferential grooves 9 and 10. In the pneumatic tire, each of the three circumferential grooves 9 and 10 has a width approximately equal to the groove width t 1 and t 2 of each of the circumferential grooves 9 and 10 within the same pitch P, respectively. Two straight parts 91, 101 parallel to the tire equatorial plane shifted in the cross-sectional direction, and each straight part 91, 1
The left and right outer circumferential grooves 10 are arranged in a staggered manner, each consisting of transition portions 92 and 102 that connect the two outer circumferential grooves 9. The cross-sectional grooves 11 are connected to the vicinity of the joints between the linear portions 91 and 101 of the circumferential grooves 9 and 10 and the transition portions 92 and 102, and are arranged in the same shape in the cross-sectional direction of the tire. The blocks 12, which are arranged side by side and have a large amount of edge in the cross-sectional direction of the tire formed by the circumferential grooves 9, 10 and the cross-sectional grooves 11, are arranged in a zigzag pattern around the tire equatorial plane. The blocks 12 are formed into block pieces 121 by grooves 13 parallel to the circumferential direction of the tire.
A pneumatic rally tire characterized by being divided into 1 and 122 parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18489381U JPS5889403U (en) | 1981-12-14 | 1981-12-14 | Rally pneumatic tires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18489381U JPS5889403U (en) | 1981-12-14 | 1981-12-14 | Rally pneumatic tires |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5889403U JPS5889403U (en) | 1983-06-17 |
| JPS6222402Y2 true JPS6222402Y2 (en) | 1987-06-08 |
Family
ID=29985451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18489381U Granted JPS5889403U (en) | 1981-12-14 | 1981-12-14 | Rally pneumatic tires |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5889403U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS533521A (en) * | 1976-06-30 | 1978-01-13 | Kao Corp | Agri-horticultural fungicide |
-
1981
- 1981-12-14 JP JP18489381U patent/JPS5889403U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS533521A (en) * | 1976-06-30 | 1978-01-13 | Kao Corp | Agri-horticultural fungicide |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5889403U (en) | 1983-06-17 |
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