JPH04163209A - Pneumatic tire - Google Patents
Pneumatic tireInfo
- Publication number
- JPH04163209A JPH04163209A JP2289263A JP28926390A JPH04163209A JP H04163209 A JPH04163209 A JP H04163209A JP 2289263 A JP2289263 A JP 2289263A JP 28926390 A JP28926390 A JP 28926390A JP H04163209 A JPH04163209 A JP H04163209A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- carcass
- bead
- protecting
- layer
- 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
- 239000011324 bead Substances 0.000 claims abstract description 24
- 239000010410 layer Substances 0.000 claims description 18
- 239000011241 protective layer Substances 0.000 claims description 14
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 230000008929 regeneration Effects 0.000 abstract 1
- 238000011069 regeneration method Methods 0.000 abstract 1
- 230000035515 penetration Effects 0.000 description 8
- 230000001681 protective effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241000590631 Biblis hyperia Species 0.000 description 1
- 229920001875 Ebonite Polymers 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003233 aromatic nylon Polymers 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
Landscapes
- Tires In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、タイヤの接地面及び側部領域における耐カツ
ト貫通性能を高めることによりその使用寿命を大巾に向
上でき、特に悪路走行車両に好適に使用しうる空気入り
タイヤに関する。Detailed Description of the Invention [Industrial Field of Application] The present invention can greatly improve the service life of a tire by improving its cut penetration resistance in the ground contact area and side area, and is particularly suitable for vehicles traveling on rough roads. The present invention relates to a pneumatic tire that can be suitably used for.
例えば土木・建築現場、採石現場等の悪路で使用される
作業車両用のタイヤにあっては、路面から***する鋭利
な岩、石等によってバットレス部からサイドウオール部
に至る側部領域にカット等の亀裂損傷を受けやすく、従
来、この側部領域のゴム厚を増大することにより、カー
カスケースに直接達する深いカットの発生を抑制してい
る。For example, tires for work vehicles used on rough roads at civil engineering/construction sites, quarry sites, etc. are cut into the side area from the buttress part to the sidewall part by sharp rocks, stones, etc. that rise from the road surface. Traditionally, by increasing the rubber thickness in this side region, the occurrence of deep cuts that reach directly into the carcass case has been suppressed.
しかしながら、ときに深いカットが生じ、その局部的な
応力によって、カーカスコードの破断を招き、タイヤ更
生等の再使用を不可能とするなど使用寿命を著しく低下
する。However, deep cuts sometimes occur, and the local stress caused by this causes the carcass cord to break, making it impossible to reuse it for tire retreading or the like, significantly shortening its service life.
しかしながらゴム厚を増大する従来のものにあっては、
耐カツト貫通性を高めるとはいえ、その効果は極めて不
十分であり近年より効果の高いものの出現が強く望まれ
ている。However, with conventional products that increase the rubber thickness,
Although it improves cut penetration resistance, its effect is extremely insufficient, and in recent years there has been a strong desire for the emergence of a more effective one.
本発明は、ベルト層の半径方向外側を全面的に覆ってサ
イドウオール部に沿ってカーカス外側をのびる保護層を
設けることを基本として、タイヤのクラウン及び側部領
域に生ずるカットがカーカスに達するのを効果的に防止
でき、タイヤ更生を可能としタイヤのトータルライフを
大巾に向上しうるタイヤの提供を目的としている。The present invention is based on the provision of a protective layer that completely covers the radially outer side of the belt layer and extends outside the carcass along the sidewall portion, so that cuts occurring in the crown and side areas of the tire will not reach the carcass. The purpose of the present invention is to provide a tire that can effectively prevent this, enable tire retreading, and greatly improve the total life of the tire.
前記目的を達成するために本発明は、トレッド部からサ
イドウオール部をへてビード部に至る本体部の両端に前
記ビード部のビードコアの廻りでタイヤの内側から外側
に折返される折返し部を設けた複数ブライよりなるバイ
アス構造のカーカスと、該カーカスの外側かつトレッド
部内方に配されるベルト層とを具えるとともに、タイヤ
円周方向に対して３０度以上かつ９０度以下の角度で補
強コードを配列しかつ前記ベルト層のタイヤ半径方向外
側を覆ってサイドウオール部に沿い前記カーカスの外側
をのびて終端する保護層を設ける一方、該保護層の前記
終端点の前記ビード部のベースラインからの高さＨは、
タイヤの標準リムのフランジ高さ近傍位置とした空気入
りタイヤである。In order to achieve the above object, the present invention provides a folded part that is folded back from the inside of the tire to the outside around the bead core of the bead part at both ends of the main body part extending from the tread part to the sidewall part to the bead part. a carcass with a bias structure consisting of a plurality of braises; a belt layer disposed outside the carcass and inside the tread portion; a protective layer is provided which covers the outside of the belt layer in the tire radial direction and extends along the sidewall part and ends on the outside of the carcass, and from the base line of the bead part at the end point of the protective layer. The height H of
This is a pneumatic tire that is positioned near the flange height of a standard tire rim.
このように構成する本発明のタイヤは、トレッド領域及
び側部領域においてカーカスを保護層のによって被覆保
護しているため、トレッド及び側部領域に深いカットが
生じる際に招く局部的な応力がカーカスに作用するのを
緩和でき、カーカスコードの破損を効果的に防止しうる
。In the tire of the present invention constructed in this way, the carcass is covered and protected by the protective layer in the tread area and the side areas, so that the local stress caused when deep cuts are made in the tread and side areas is absorbed by the carcass. damage to the carcass cord can be effectively prevented.
しかも保護層は、浅いカットがタイヤの繰返し変形に起
因してカーカスにまで成長するのを阻止しうるため、該
カットから浸入する水分等に原因するカーカスコードの
損傷、プライ剥離等をも防止でき、直接的な耐カツト貫
通性の向上と相まって、タイヤの寿命を大巾に向上しう
る。In addition, the protective layer can prevent shallow cuts from growing into the carcass due to repeated deformation of the tire, so it can also prevent carcass cord damage and ply peeling caused by moisture entering from the cuts. This, combined with the direct improvement in cut penetration resistance, can significantly improve tire life.
又保護層は標準リムのフランジ高さ相当位置の高さで終
端しているため、タイヤ変形の際に、保護層及びカーカ
スプライ折返し部の各端部に作用する応力を、その間の
ゴム伸縮によって緩和させることもでき、各端部でのコ
ードルースを抑制しうるとともに外傷を防止するのに役
立つ。In addition, since the protective layer terminates at a height equivalent to the flange height of a standard rim, when the tire deforms, the stress acting on the protective layer and each end of the carcass ply folds is absorbed by the elastic expansion and contraction of the rubber between them. It can also be relaxed, which can help reduce cord looseness at each end and help prevent trauma.
以下本発明の一実施例を図面に基づき説明する。 An embodiment of the present invention will be described below based on the drawings.
図において、タイヤ１は、ビードコア２が通るビード部
３と、該ビード部３に連なりかつタイヤ半径方向外向き
にのびるサイドウオール部４と、該サイドウオール部４
の外端間を継ぐトレッド部５とを具えている。又ビード
部３．８間には、前記トレッド部５からサイドウオール
部４を通ってビード部３に至る本体部７Ａ両端に、前記
ビードコア２の廻りでタイヤの内側から外側に折返され
る折返し部７Ｂを形成したカーカス７が架は渡されると
ともに、該カーカス７の外側にはベルト層９と、保護層
１０とが設けられる。In the figure, a tire 1 includes a bead portion 3 through which a bead core 2 passes, a sidewall portion 4 that is continuous with the bead portion 3 and extends outward in the tire radial direction, and a sidewall portion 4.
The tread portion 5 connects the outer ends of the tread portion 5. Further, between the bead portions 3.8, there are folded portions that are folded back from the inside of the tire to the outside around the bead core 2 at both ends of the main body portion 7A extending from the tread portion 5 through the sidewall portion 4 to the bead portion 3. The carcass 7 in which the carcass 7B is formed is placed on a rack, and a belt layer 9 and a protective layer 10 are provided on the outside of the carcass 7.
前記カーカス７は、カーカスコードをタイヤ赤道に対し
て３０〜６０°の角度で配列した複数枚のカーカスプラ
イからなるバイアス構造のものが採用される。なおり−
カスコードとしては芳香族ポリアミド、ナイロン、ポリ
エステル等の有機繊維コードが用いられる。The carcass 7 has a bias structure consisting of a plurality of carcass plies in which carcass cords are arranged at an angle of 30 to 60 degrees with respect to the tire equator. Naori-
As the cascord, organic fiber cords such as aromatic polyamide, nylon, and polyester are used.
又該カーカス７の本体部７Ａ及びその両端の折返し部７
Ｂの間には、硬質ゴムからなりかつ前記ビードコア２か
ら半径方向外方にその厚さを漸減してのびる断面三角形
状のビードエーペックス８が設けられ、前記ビード部３
を補強している。Also, the main body portion 7A of the carcass 7 and the folded portions 7 at both ends thereof.
A bead apex 8 made of hard rubber and having a triangular cross section and extending radially outward from the bead core 2 with a gradually decreasing thickness is provided between the bead portions 3 and 3.
is reinforced.
また前記ベルト層９は、本例ではカーカス７からトレッ
ド表面に向かって順に配される第１、第２のベルトプラ
イ１１．１２からなる２層構造をなす。又最も広巾のベ
ルトプライ、本例では第２のベルトプライ１２は、その
タイヤ軸方向のプライ巾をイ也のベルトプライイ１１の
ブライ巾に比して大に形成され、最大中となるベルト層
９のベルト巾Ｌ１即ち本例では第２のベルトプライ１２
のブライ巾をトレッド巾ＴＷの０．８０倍以上かつ０．
９９倍以下とすることによりベルト層９は、トレッド部
５をそのほぼ全中に亘りタガ効果を有して補強する。In this example, the belt layer 9 has a two-layer structure consisting of first and second belt plies 11 and 12 arranged in order from the carcass 7 toward the tread surface. In addition, the widest belt ply, in this example, the second belt ply 12, is formed so that its ply width in the tire axial direction is larger than that of the second belt ply 11, and the width of the belt ply is the largest. Belt width L1 of layer 9, that is, second belt ply 12 in this example
The tread width should be at least 0.80 times the tread width TW and 0.80 times the tread width TW.
By setting the thickness to 99 times or less, the belt layer 9 reinforces the tread portion 5 almost entirely throughout it with a hoop effect.
又前記ベルトプライ１１．１２は、本例では弾性率が２
００ｋｇ／ｍｍ２以上のベルトコードをタイヤ赤道に対
して１０°以上かつ４５°以下の角度で互いに平行に配
列したコード配列体であり、ベルトプライ１１．１２は
、夫々各ベルトコードがプライ間相互で互いに交差する
向きに方向を違えて配置している。In addition, the belt ply 11.12 has an elastic modulus of 2 in this example.
It is a cord arrangement body in which belt cords of 00 kg/mm2 or more are arranged parallel to each other at an angle of 10 degrees or more and 45 degrees or less with respect to the tire equator. They are arranged in different directions so that they cross each other.
前記保護層１０は、本例では前記ベルト層９の外側に配
されることにより該ベルト層９を覆うトレッド保護部１
５の両端に、ベルト層９のタイヤ軸方向外端９ａ近傍か
らサイドウオール部４に沿ってカーカス７の外側をのび
て終端するサイド保護部１６を延設した一枚の連続した
保護プライから形成される。In this example, the protective layer 10 is a tread protection part 1 that is arranged on the outside of the belt layer 9 and covers the belt layer 9.
Formed from a single continuous protective ply, side protection parts 16 extend from near the outer end 9a of the belt layer 9 in the tire axial direction along the sidewall part 4 to the outside of the carcass 7 and terminate at both ends of the belt layer 5. be done.
又保護プライは、例えばスチール製の保護コードをタイ
ヤ円周方向に対して３０’以上かつ９０’以下の角度で
配列したコード配列体であって、前記サイド保護部１６
によりバトレス部１８からサイドウオール部４に至る側
部領域においてカーカス７へのカット貫通を阻止する一
方、トレッド保護部１５によりベルト層９を保護し、最
上層のベルトプライ１２がカット貫通を受けた際に生じ
るトラス構造の緩みに起因したトレッド剛性の低下
・及びそれに伴う耐摩耗性や操縦安定性の低下等を防
止する。The protective ply is, for example, a cord array body in which protective cords made of steel are arranged at an angle of 30' or more and 90' or less with respect to the tire circumferential direction, and
This prevents cut penetration into the carcass 7 in the side region from the buttress portion 18 to the sidewall portion 4, while the tread protection portion 15 protects the belt layer 9, and the top layer belt ply 12 receives cut penetration. Decreased tread rigidity due to loosening of the truss structure that occurs during
・Preventing the associated decline in wear resistance and handling stability.
又保護コードとして他にナイロン、ポリエステル等の有
機繊維コードが使用でき、かかる場合保護プライは１枚
以上より好ましくは２枚以上でかつ保護コードをプライ
間相互で互いに交差させることが望ましい。In addition, an organic fiber cord such as nylon or polyester can be used as the protective cord. In such a case, it is preferable that the protective ply is one or more, preferably two or more, and that the protective cords are crossed between the plies.
なお本例のごとくスチールコードを用いた場合、タイヤ
剛性の増大を抑制するために保護プライは１枚とするの
がよく、又かかる目的のために保護コード角度は前述の
ごとく３０°以上かつ９０゜以下としている。Note that when a steel cord is used as in this example, it is best to use only one protective ply in order to suppress an increase in tire rigidity, and for this purpose, the protective cord angle should be 30 degrees or more and 90 degrees as described above.゜ or less.
又保護層１０はその終端点１０ａのビード部ベースライ
ンＬからの高さＨはタイヤに対する標準リムＲのフラン
ジ高さＦＨの高さ近傍位置までとする。ここで近傍とは
、フランジ高さＦＨを中心として、フランジ高さＦ Ｈ
の５０％を上下する範囲をいう。このことによりカット
の発生頻度が高い前記側部領域での耐カツト貫通性を高
めている。Further, the height H of the end point 10a of the protective layer 10 from the bead base line L is set to a position close to the flange height FH of the standard rim R relative to the tire. Here, the neighborhood means flange height FH as the center, and flange height FH as the center.
This refers to the range above and below 50% of the This improves cut penetration resistance in the side regions where cuts occur frequently.
又終端点１０ａと、カーカス７の折返し部７Ｂの上端７
Ｂａとの間にゴムを介在させる。これにより各終端点１
０ａ１上端７Ｂａに作用する応力をゴム伸縮によって緩
和させうる。Also, the terminal point 10a and the upper end 7 of the folded part 7B of the carcass 7
Rubber is interposed between Ba and Ba. This allows each terminal point 1
The stress acting on the upper end 7Ba of 0a1 can be relaxed by the rubber expansion and contraction.
第１図に示すタイヤ構造をなしかつ第１表の仕様に基づ
きタイヤを試作するとともに、該試作タイヤを採石現場
にて実車走行させ、その時のタイヤ寿命を従来タイヤと
比較した。A tire having the tire structure shown in FIG. 1 was prototyped based on the specifications shown in Table 1, and the prototype tire was driven on an actual vehicle at a quarry site, and the tire life at that time was compared with that of a conventional tire.
第１表に示すように、本発明のタイヤは、従来タイヤに
比して耐カツト貫通性を高めているため、従来タイヤに
比して完全摩耗終了率を大巾に向上でき、しかもこれら
完全摩耗したタイヤはさらにタイヤ更生によって再使用
しうるためそのトータルライフを大巾に高めることが可
能となる。As shown in Table 1, the tire of the present invention has improved cut penetration resistance compared to conventional tires, so it can greatly improve the complete wear rate compared to conventional tires. Worn tires can be reused through tire retreading, making it possible to greatly extend their total life.
又本発明のタイヤは、トラック、ショベルカー等悪路で
の作業車両用タイヤの他、乗用車両用タイヤとして形成
することができる。Further, the tire of the present invention can be formed as a tire for a passenger vehicle as well as a tire for a working vehicle on rough roads such as a truck or an excavator.
取上のごとく本考案のタイヤは、ベルト層の外端近傍か
らサイドウオール部に沿ってのびる保護層を設は耐カツ
ト貫通性を高めているため、カット等の亀裂に起因する
カーカスの破損を防止できタイヤの使用寿命を大巾に向
上しうる。As mentioned above, the tire of this invention has a protective layer that extends from near the outer edge of the belt layer along the sidewall to improve cut penetration resistance, thereby preventing damage to the carcass due to cracks caused by cuts, etc. This can greatly improve the service life of tires.
第１図は本発明の一実施例を示す断面図である。
２−・−ビードコア、 ３・−ビード部、４−−−一
−−サイドウオール部、 ５−トレッド部、７、−、
、、カーカス、 ７ Ａ−−−本体部、７Ｂ 、折返し
部、９、−、ベルト層、 Ｉ ＣＬ、、、、−保
護層、１６・・−・サイド保護部、Ｌ −ベースライン
、Ｒ・−リム。
特許出願人 住友ゴム工業株式会社代理人 弁理
士 苗 村 正第１表
タイヤサイズ １０．０Ｏ−２０１４ＰＲ。FIG. 1 is a sectional view showing one embodiment of the present invention. 2--bead core, 3--bead part, 4--1--side wall part, 5-tread part, 7,-,
,, carcass, 7 A---body part, 7B, folded part, 9, -, belt layer, I CL, ,,, -protective layer, 16... side protection part, L - baseline, R. -Rim. Patent Applicant Sumitomo Rubber Industries Co., Ltd. Agent Patent Attorney Tadashi Naemura Table 1 Tire Size 10.0O-2014PR.
Claims (1)
至る本体部の両端に前記ビード部のビードコアの廻りで
タイヤの内側から外側に折返される折返し部を設けた複
数プライよりなるバイアス構造のカーカスと、該カーカ
スの外側かつトレッド部内方に配されるベルト層とを具
えるとともに、タイヤ円周方向に対して３０度以上かつ
９０度以下の角度で補強コードを配列しかつ前記ベルト
層のタイヤ半径方向外側を覆ってサイドウォール部に沿
い前記カーカスの外側をのびて終端する保護層を設ける
一方、該保護層の前記終端点の前記ビード部のベースラ
インからの高さＨは、タイヤの標準リムのフランジ高さ
近傍位置とした空気入りタイヤ。1. A carcass with a bias structure consisting of multiple plies, which is provided with a folded part that is folded from the inside of the tire to the outside around the bead core of the bead part at both ends of the main body part extending from the tread part to the sidewall part to the bead part. , a belt layer disposed outside the carcass and inside the tread portion, reinforcing cords are arranged at an angle of 30 degrees or more and 90 degrees or less with respect to the tire circumferential direction, and the tire radius of the belt layer is A protective layer is provided that covers the outer side of the carcass and extends along the sidewall portion and terminates, and the height H of the termination point of the protective layer from the baseline of the bead portion is equal to that of the standard rim of the tire. A pneumatic tire positioned near the flange height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2289263A JPH04163209A (en) | 1990-10-25 | 1990-10-25 | Pneumatic tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2289263A JPH04163209A (en) | 1990-10-25 | 1990-10-25 | Pneumatic tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04163209A true JPH04163209A (en) | 1992-06-08 |
Family
ID=17740896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2289263A Pending JPH04163209A (en) | 1990-10-25 | 1990-10-25 | Pneumatic tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04163209A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007326403A (en) * | 2006-06-06 | 2007-12-20 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| US7624779B2 (en) * | 2005-09-01 | 2009-12-01 | Bridgestone Americas Tire Operations, Llc | Tire having a sidewall reinforcement |
| US7836929B2 (en) | 2005-09-01 | 2010-11-23 | Bridgestone Americas Tire Operations, Llc | Tire having a sidewall reinforcement |
| US8190681B2 (en) | 2005-07-27 | 2012-05-29 | Within3, Inc. | Collections of linked databases and systems and methods for communicating about updates thereto |
| US8412706B2 (en) | 2004-09-15 | 2013-04-02 | Within3, Inc. | Social network analysis |
| US8453044B2 (en) | 2005-06-29 | 2013-05-28 | Within3, Inc. | Collections of linked databases |
| US8577886B2 (en) | 2004-09-15 | 2013-11-05 | Within3, Inc. | Collections of linked databases |
| US8635217B2 (en) | 2004-09-15 | 2014-01-21 | Michael J. Markus | Collections of linked databases |
| US8880521B2 (en) | 2004-09-15 | 2014-11-04 | 3Degrees Llc | Collections of linked databases |
| US20170043625A1 (en) * | 2014-04-25 | 2017-02-16 | Bridgestone Corporation | Pneumatic tire |
| US10395326B2 (en) | 2005-11-15 | 2019-08-27 | 3Degrees Llc | Collections of linked databases |
-
1990
- 1990-10-25 JP JP2289263A patent/JPH04163209A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US9330182B2 (en) | 2004-09-15 | 2016-05-03 | 3Degrees Llc | Social network analysis |
| US8412706B2 (en) | 2004-09-15 | 2013-04-02 | Within3, Inc. | Social network analysis |
| US8577886B2 (en) | 2004-09-15 | 2013-11-05 | Within3, Inc. | Collections of linked databases |
| US8635217B2 (en) | 2004-09-15 | 2014-01-21 | Michael J. Markus | Collections of linked databases |
| US8880521B2 (en) | 2004-09-15 | 2014-11-04 | 3Degrees Llc | Collections of linked databases |
| US10733242B2 (en) | 2004-09-15 | 2020-08-04 | 3Degrees Llc | Collections of linked databases |
| US8453044B2 (en) | 2005-06-29 | 2013-05-28 | Within3, Inc. | Collections of linked databases |
| US8190681B2 (en) | 2005-07-27 | 2012-05-29 | Within3, Inc. | Collections of linked databases and systems and methods for communicating about updates thereto |
| US7624779B2 (en) * | 2005-09-01 | 2009-12-01 | Bridgestone Americas Tire Operations, Llc | Tire having a sidewall reinforcement |
| US7836929B2 (en) | 2005-09-01 | 2010-11-23 | Bridgestone Americas Tire Operations, Llc | Tire having a sidewall reinforcement |
| US10395326B2 (en) | 2005-11-15 | 2019-08-27 | 3Degrees Llc | Collections of linked databases |
| JP2007326403A (en) * | 2006-06-06 | 2007-12-20 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| US20170043625A1 (en) * | 2014-04-25 | 2017-02-16 | Bridgestone Corporation | Pneumatic tire |
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