JPH06320922A - Pneumatic radial tire - Google Patents
Pneumatic radial tireInfo
- Publication number
- JPH06320922A JPH06320922A JP5115013A JP11501393A JPH06320922A JP H06320922 A JPH06320922 A JP H06320922A JP 5115013 A JP5115013 A JP 5115013A JP 11501393 A JP11501393 A JP 11501393A JP H06320922 A JPH06320922 A JP H06320922A
- Authority
- JP
- Japan
- Prior art keywords
- carcass
- reinforcing layer
- bead
- layer
- reinforcing
- 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
Landscapes
- Tires In General (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、空気入りラジアルタイ
ヤに係り、トラック、バス等のチューブレスタイヤに利
用される。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic radial tire and is used for tubeless tires such as trucks and buses.
【０００２】[0002]
【従来の技術】チューブレスの空気入りラジアルタイヤ
において、タイヤビード部の耐久性を向上したものとし
て図２に示すものがある。図２において、ビード部１に
ボードコア２を埋設し、該ビードコア２上に断面クサビ
形のビードフィラーゴム３を備え、ラジアルカーカス４
の端部を前記ビードコア２の外周に内側から外側に向か
って巻上げているとともに、該カーカス巻上げ部４Ａの
外周に、断面Ｕ字形のスチール補強層５を備え、該スチ
ール補強層５の外側補強部５Ｂのエッジ５Ｂ−１と巻上
げ部エッジ４Ａ−１の両者の動きを少なくするため、ナ
イロン、ケブラー、ポリエステル等の外側繊維補強層６
を設けるとともに、内側補強部５Ａのエッジ５Ａ−１の
動きを少なくするため、ナイロン、ケブラー、ポリエス
テル等の内側繊維補強層７を設けたものがある。2. Description of the Related Art In a tubeless pneumatic radial tire, there is one shown in FIG. 2 in which the durability of the tire bead portion is improved. In FIG. 2, a board core 2 is embedded in a bead portion 1, a bead filler rubber 3 having a wedge-shaped cross section is provided on the bead core 2, and a radial carcass 4 is provided.
Is wound around the bead core 2 from the inner side to the outer side, and the carcass winding portion 4A is provided with a steel reinforcing layer 5 having a U-shaped cross section on the outer periphery. The steel reinforcing layer 5 has an outer reinforcing portion. An outer fiber reinforcing layer 6 made of nylon, Kevlar, polyester, or the like in order to reduce movements of both the edge 5B-1 of 5B and the winding edge 4A-1.
And an inner fiber reinforcing layer 7 made of nylon, Kevlar, polyester or the like is provided in order to reduce the movement of the edge 5A-1 of the inner reinforcing portion 5A.
【０００３】[0003]
【発明が解決しようとする課題】図２に示した従来の技
術におけるタイヤＴでは、これをリム８に嵌合して走行
しているとき、内側繊維補強層７がラジアルカーカス４
に直接接触しているため、両者７，４の動きの違いに基
づいて補強層エッジ７−１の躍り等によってカーカス４
のコード（スチールコード）が切断するおそれがあっ
た。In the tire T according to the prior art shown in FIG. 2, when the tire T is fitted into the rim 8 and is running, the inner fiber reinforcing layer 7 is provided with the radial carcass 4
Since it is in direct contact with the carcass 4 due to the jump of the reinforcement layer edge 7-1, etc.
The cord (steel cord) could be cut.
【０００４】そこで本発明は、内側繊維補強度６とカー
カス４との直接接触をなくしてカーカス４の切断を防止
したことを目的とする。Therefore, an object of the present invention is to prevent the carcass 4 from being cut by eliminating direct contact between the inner fiber reinforcing degree 6 and the carcass 4.
【０００５】[0005]
【課題を解決するための手段】本発明は、ビード部１に
ビードコア２を埋設し、該ビードコア２上に断面クサビ
形のビードフィラーゴム３を備え、ラジアルカーカス４
の端部を前記ビードコア２の外周に内側から外側に向か
って巻上げているとともに、該カーカス巻上げ部４Ａの
外周に、断面Ｕ字形のスチール補強層５を備え、該スチ
ール補強層５の内側補強部５Ａ上に、該補強部エッジ５
Ａ−１を覆って内側繊維補強層７を備えている空気入り
ラジアルタイヤＴにおいて、前述の目的を達成するため
に、次の技術的手段を講じている。According to the present invention, a bead core 2 is embedded in a bead portion 1, a bead filler rubber 3 having a wedge-shaped cross section is provided on the bead core 2, and a radial carcass 4 is provided.
Is wound around the outer periphery of the bead core 2 from the inner side to the outer side, and a steel reinforcing layer 5 having a U-shaped cross section is provided on the outer periphery of the carcass winding portion 4A, and the inner reinforcing portion of the steel reinforcing layer 5 is provided. 5A on the reinforcement edge 5
In the pneumatic radial tire T having the inner fiber reinforcing layer 7 covering A-1, the following technical measures are taken in order to achieve the above-mentioned object.
【０００６】すなわち、本発明は、前記補強部エッジ５
Ａ−１の径外側でかつラジアルカーカス４と内側繊維補
強層７との間に両者４，７を隔離する絶縁ゴム層９を介
在していることを特徴とするものである。That is, according to the present invention, the reinforcing portion edge 5 is used.
It is characterized in that an insulating rubber layer 9 for separating the radial carcass 4 and the inner fiber reinforcing layer 7 between the radial carcass 4 and the inner side of A-1 is interposed.
【０００７】[0007]
【作用】本発明における空気入りラジアルタイヤＴをリ
ム８に嵌合して走行しているとき、内側補強部５Ａにお
けるエッジ５Ａ−１の躍りは、内側繊維補強層７によっ
て抑制されるとともに、内側繊維補強層７とカーカス４
とは絶縁ゴム層９で隔絶されていることから、補強層エ
ッジ７−１の躍り等は該ゴム層９で吸収緩和されてセパ
レーションを防止するとともにカーカス４との接触がな
いことからこれの切断等はなくなる。When the pneumatic radial tire T of the present invention is fitted to the rim 8 and is running, the edge 5A-1 of the inner reinforcing portion 5A is prevented from jumping by the inner fiber reinforcing layer 7 and Fiber reinforcement layer 7 and carcass 4
Since the rubber layer 9 is isolated by the insulating rubber layer 9, jumps and the like of the reinforcing layer edge 7-1 are absorbed and relaxed by the rubber layer 9 to prevent separation, and there is no contact with the carcass 4. Etc. will disappear.
【０００８】[0008]
【実施例】以下、図１を参照して本発明の実施例を説明
するが、図２を参照して既述した構成と共通する部分は
共通符号で示し、以下、相違点乃至改良部分について説
明する。図１において、内側補強部５Ａにおけるエッジ
５Ａ−１の径外側でかつラジアルカーカス４と内側繊維
補強層７との間に両者４，７を隔絶するための絶縁ゴム
層９が介在されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 1, but parts common to the configuration described with reference to FIG. explain. In FIG. 1, an insulating rubber layer 9 for isolating both the radial carcass 4 and the inner fiber reinforcing layer 7 is provided outside the edge 5A-1 in the inner reinforcing portion 5A and between the radial carcass 4 and the inner fiber reinforcing layer 7.
【０００９】この絶縁ゴム層９はエッジ５Ａ−１の躍り
を内側補強部５Ａと協働して抑制するとともに、内側補
強部５Ａのエッジ５Ａ−１の躍りを吸収緩和している。
本発明に係るタイヤと図２に示したタイヤと室内走行試
験機による走行試験した結果、図２に示した従来例では
カーカスコードのフィラメント切れが発生したのに対
し、本発明に係るタイヤにおいてはカーカスコードフィ
ラメントの損傷はなかった。The insulating rubber layer 9 suppresses the jump of the edge 5A-1 in cooperation with the inner reinforcing portion 5A and absorbs and relaxes the jump of the edge 5A-1 of the inner reinforcing portion 5A.
As a result of a running test using the tire according to the present invention, the tire shown in FIG. 2, and an indoor running tester, filament breakage of the carcass cord occurred in the conventional example shown in FIG. 2, whereas in the tire according to the present invention, The carcass cord filament was not damaged.
【００１０】但し、両者ともにテストタイヤサイズは、
１０．００Ｒ２０−１４ＰＲであり、走行条件は内圧
８．０Ｋｇ／ｃｍ2 、荷重３６５０Ｋｇ、速度５０Ｋｍ
／Ｈｒ、走行距離３０．０００Ｋｍである。However, the test tire size for both is
It is 10.00R20-14PR, and the running conditions are an internal pressure of 8.0 kg / cm 2 , a load of 3650 kg, and a speed of 50 km.
/ Hr and the traveling distance is 30.000 km.
【００１１】[0011]
【発明の効果】本発明は以上の通りであり、カーカスコ
ードの切断発生をなくしてビード部の耐久性を向上でき
る。The present invention is as described above, and the durability of the bead portion can be improved by eliminating the occurrence of cutting of the carcass cord.
【図１】本発明実施例における断面図である。FIG. 1 is a sectional view of an embodiment of the present invention.
【図２】従来例の断面図である。FIG. 2 is a sectional view of a conventional example.
Ｔ タイヤ １ ビード部 ２ ビードコア ３ ビードフィラーゴム ４ カーカス ４Ａ 巻上げ部 ５ スチール補強層 ５Ａ−１ エッジ ９ 絶縁ゴム層 T tire 1 bead part 2 bead core 3 bead filler rubber 4 carcass 4A winding part 5 steel reinforcing layer 5A-1 edge 9 insulating rubber layer
Claims (1)
設し、該ビードコア（２）上に断面クサビ形のビードフ
ィラーゴム（３）を備え、ラジアルカーカス（４）の端
部を前記ビードコア（２）の外周に内側から外側に向か
って巻上げているとともに、該カーカス巻上げ部（４
Ａ）の外周に、断面Ｕ字形のスチール補強層（５）を備
え、該スチール補強層（５）の内側補強部（５Ａ）上
に、該補強部エッジ（５Ａ−１）を覆って内側繊維補強
層（７）を備えている空気入りラジアルタイヤ（Ｔ）に
おいて、 前記補強部エッジ（５Ａ−１）の径外側でかつラジアル
カーカス（４）と内側繊維補強層（７）との間に両者
（４）（７）を隔離する絶縁ゴム層（９）を介在してい
ることを特徴とする空気入りラジアルタイヤ。1. A bead core (2) is embedded in a bead portion (1), a bead filler rubber (3) having a wedge-shaped cross section is provided on the bead core (2), and an end portion of a radial carcass (4) is provided with the bead core. The carcass hoisting portion (4) is wound around the outer circumference of (2) from the inside to the outside.
A) A steel reinforcing layer (5) having a U-shaped cross section is provided on the outer periphery of the inner reinforcing fiber (5A) on the inner reinforcing portion (5A) of the steel reinforcing layer (5) so as to cover the reinforcing portion edge (5A-1). In a pneumatic radial tire (T) having a reinforcing layer (7), both of the radial carcass (4) and the inner fiber reinforcing layer (7) are radially outside the reinforcing portion edge (5A-1). (4) A pneumatic radial tire having an insulating rubber layer (9) separating the (7) from each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5115013A JPH06320922A (en) | 1993-05-17 | 1993-05-17 | Pneumatic radial tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5115013A JPH06320922A (en) | 1993-05-17 | 1993-05-17 | Pneumatic radial tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06320922A true JPH06320922A (en) | 1994-11-22 |
Family
ID=14652107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5115013A Pending JPH06320922A (en) | 1993-05-17 | 1993-05-17 | Pneumatic radial tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06320922A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998052779A1 (en) * | 1997-05-20 | 1998-11-26 | The Goodyear Tire & Rubber Company | Tire with removable tire tread belt and improved apex design |
| US6352090B1 (en) | 1997-05-20 | 2002-03-05 | The Goodyear Tire & Rubber Company | Tire with reversed carcass ply turnup configuration |
| US6357498B1 (en) | 1997-05-20 | 2002-03-19 | The Goodyear Tire & Rubber Company | Tire with removable tire tread belt and improved apex design |
| US6390165B1 (en) | 1997-05-20 | 2002-05-21 | The Goodyear Tire & Rubber Company | Tire with improved carcass ply turnup configuration |
| US6526659B2 (en) | 1999-11-18 | 2003-03-04 | The Goodyear Tire & Rubber Company | Method of changing very large tires |
| JP2003531057A (en) * | 2000-04-25 | 2003-10-21 | ソシエテ ド テクノロジー ミシュラン | Miniaturized tire beads |
| US6701988B2 (en) * | 2000-10-19 | 2004-03-09 | Bridgestone Corporation | Pneumatic radial tires |
| CN104723804A (en) * | 2013-12-19 | 2015-06-24 | 东洋橡胶工业株式会社 | Pneumatic radial tire |
-
1993
- 1993-05-17 JP JP5115013A patent/JPH06320922A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998052779A1 (en) * | 1997-05-20 | 1998-11-26 | The Goodyear Tire & Rubber Company | Tire with removable tire tread belt and improved apex design |
| AU737362B2 (en) * | 1997-05-20 | 2001-08-16 | Goodyear Tire And Rubber Company, The | Tire with removable tire tread belt and improved apex design |
| US6352090B1 (en) | 1997-05-20 | 2002-03-05 | The Goodyear Tire & Rubber Company | Tire with reversed carcass ply turnup configuration |
| US6357498B1 (en) | 1997-05-20 | 2002-03-19 | The Goodyear Tire & Rubber Company | Tire with removable tire tread belt and improved apex design |
| US6390165B1 (en) | 1997-05-20 | 2002-05-21 | The Goodyear Tire & Rubber Company | Tire with improved carcass ply turnup configuration |
| US6526659B2 (en) | 1999-11-18 | 2003-03-04 | The Goodyear Tire & Rubber Company | Method of changing very large tires |
| JP2003531057A (en) * | 2000-04-25 | 2003-10-21 | ソシエテ ド テクノロジー ミシュラン | Miniaturized tire beads |
| JP4653923B2 (en) * | 2000-04-25 | 2011-03-16 | ソシエテ ド テクノロジー ミシュラン | Miniaturized tire beads |
| US6701988B2 (en) * | 2000-10-19 | 2004-03-09 | Bridgestone Corporation | Pneumatic radial tires |
| CN104723804A (en) * | 2013-12-19 | 2015-06-24 | 东洋橡胶工业株式会社 | Pneumatic radial tire |
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