JP3243291B2 - Core assembly for pneumatic tires - Google Patents
Core assembly for pneumatic tiresInfo
- Publication number
- JP3243291B2 JP3243291B2 JP20666792A JP20666792A JP3243291B2 JP 3243291 B2 JP3243291 B2 JP 3243291B2 JP 20666792 A JP20666792 A JP 20666792A JP 20666792 A JP20666792 A JP 20666792A JP 3243291 B2 JP3243291 B2 JP 3243291B2
- Authority
- JP
- Japan
- Prior art keywords
- core assembly
- pneumatic tire
- rim
- tire
- arc
- 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 - Fee Related
Links
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
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
- B60C17/04—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency
- B60C17/06—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient
-
- 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
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
- B60C17/04—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency
- B60C17/045—Rotatable supports relative to the rim
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明はパンクなどにより、空気
入りタイヤの内圧が低下した時でも、一定距離の安全走
行を可能にする空気入りタイヤ用中子組立体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core assembly for a pneumatic tire capable of driving safely for a certain distance even when the internal pressure of the pneumatic tire is reduced due to puncture or the like.
【０００２】[0002]
【従来の技術】従来、中子組立体をリムに取り付けた例
は過去多数ある。しかし、それらは殆どがリムにボルト
等で固定してあるため、ランフラット（低内圧走行）
時、タイヤと中子組立体の間の周長差の為にタイヤと中
子組立体の間に擦れを生じ、タイヤが破損を生じやすい
と言う欠点がる。2. Description of the Related Art There have been many examples in the past where a core assembly has been mounted on a rim. However, most of them are fixed to the rim with bolts etc., so run flat (low internal pressure running)
At the time, there is a disadvantage that the circumferential length difference between the tire and the core assembly causes friction between the tire and the core assembly, and the tire is easily damaged.
【０００３】これに対し、特開平２−２４６８１１にあ
る様な回転式の中子組立体がある。これは弾性体による
ものであり、リムと中子組立体の間が滑ることによって
タイヤの破損を著しく防止することに効果を上げてい
る。On the other hand, there is a rotary core assembly as disclosed in Japanese Patent Application Laid-Open No. 2-46811. This is due to the elastic body, which is effective in remarkably preventing the tire from being damaged by slipping between the rim and the core assembly.
【０００４】[0004]
【発明が解決しようとする課題】前述の特開平２−２４
６８１１にあるような回転式中子組立体は、タイヤの破
損は、リムと中子組立体の間が滑ることにより防止でき
る。しかし、それを装着したタイヤの使用条件のうち
で、実用上有りえる範囲の高荷重または高速度におい
て、ランフラット時、中子組立体のリムウエル部との接
触面が摩擦によって磨耗を起し振動が発生し走行不能に
なると言う欠点がある。また非舗装路で早期に変形や破
壊が起こり、著しくランフラット距離が短くなるという
欠点もある。SUMMARY OF THE INVENTION The aforementioned JP-A-2-24
In a rotating core assembly such as the 6811, tire breakage can be prevented by slipping between the rim and the core assembly. However, the contact surface between the core assembly and the rim well of the core assembly will wear due to friction during run-flat at high load or high speed within the practical range of the tires equipped with it, causing vibration. There is a drawback that running occurs and the vehicle cannot run. In addition, there is a disadvantage that deformation or destruction occurs early on an unpaved road, and the run flat distance is significantly shortened.
【０００５】従って、中子組立体の材料として耐熱性の
優れた樹脂を使用し、耐荷重性を考慮し肉厚に設計する
必要があるが、その場合大幅に重量アップとなり、通常
走行時の操縦安定性が悪くなる。Therefore, it is necessary to use a resin having excellent heat resistance as the material of the core assembly and design the core to be thick in consideration of the load resistance. Maneuvering stability deteriorates.
【０００６】本発明は上記事実を考慮し、パンクなどに
より、空気入りタイヤの内圧が低下した時でも、比較的
長距離の安全走行を可能にするとともに、非舗装路を走
行しても走行距離が著しく低下せず、しかも軽量で通常
走行時の操縦安定性に優れた空気入りタイヤ用中子組立
体を得ることが目的である。[0006] In consideration of the above facts, the present invention enables relatively long-distance safe driving even when the internal pressure of the pneumatic tire is reduced due to puncture or the like, and the driving distance even when traveling on an unpaved road. It is an object of the present invention to obtain a core assembly for a pneumatic tire which is lightweight and has excellent steering stability during normal running.
【０００７】[0007]
【課題を解決するための手段】しかるに、請求項１に記
載の本発明の空気入りタイヤ用中子組立体は、曲げ弾性
率７００００〜１２００００kg/cm2の高弾性率樹脂の外
殻層と中空の内部層とからなるシェル構造を有してお
り、２個以上の弧状体の端部同志を重ね合わせて連結す
ることにより環状に組立てられ、空気入りタイヤを装着
したリムのウエル部外側に嵌合されてなる。また、請求
項２に記載の本発明は、請求項１に記載の空気入りタイ
ヤ用中子組立体において、前記シェル構造がガス射出成
形法で製造されている。 Means for Solving the Problems According to the first aspect,
The core assembly for a pneumatic tire according to the present invention has a shell structure including an outer shell layer of a high elastic modulus resin having a flexural modulus of 70,000 to 120,000 kg / cm 2 and a hollow inner layer. A plurality of arc-shaped members are assembled in an annular shape by overlapping and connecting the ends of the arc-shaped members, and fitted to the outside of the well portion of the rim on which the pneumatic tire is mounted. Also, billing
The invention according to claim 2 provides the pneumatic tie according to claim 1.
In the core assembly, the shell structure is formed by gas injection.
Manufactured in the form method.
【０００８】[0008]
【作用】本発明の空気入りタイヤ用中子組立体は、通常
走行時はその半径方向内端とリムのウエル部との摩擦に
よってリムと一体となって回転している。このとき、本
発明の空気入りタイヤ用中子組立体を構成する弧状体は
中空のため、従来の中子組立体に比べ軽量であり、操縦
安定性が悪化しない。また、パンク等により空気入りタ
イヤの内圧が低下すると、空気入りタイヤは接地側にお
いて潰れ、クラウン部内面が中子組立体の半径方向外端
に接触するようになる。この時、中子組立体は前記空気
入りタイヤを内側から支持してその潰れを阻止し、内圧
低下状態における空気入りタイヤの走行（ランフラッ
ト）を可能にするとともに、該空気入りタイヤから与え
られた力によりリムのウエル部上を滑って回転し、空気
入りタイヤのクラウン部内面と中子組立体の半径方向外
端との間の擦れを防止する。The pneumatic tire core assembly of the present invention rotates integrally with the rim during normal running due to friction between its radial inner end and the rim well. At this time, since the arc-shaped body constituting the pneumatic tire core assembly of the present invention is hollow, it is lighter in weight than a conventional core assembly, and steering stability does not deteriorate. When the internal pressure of the pneumatic tire decreases due to puncture or the like, the pneumatic tire collapses on the ground contact side, and the inner surface of the crown portion comes into contact with the radially outer end of the core assembly. At this time, the core assembly supports the pneumatic tire from the inside to prevent the pneumatic tire from collapsing, enables the pneumatic tire to run (run flat) in a state where the internal pressure is low, and is provided by the pneumatic tire. The force causes the rim to slide and rotate over the well, preventing friction between the inner surface of the crown of the pneumatic tire and the radially outer end of the core assembly.
【０００９】[0009]
【実施例】本発明に係る空気入りタイヤ用中子組立体の
一実施例を図１〜図３に従って説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a pneumatic tire core assembly according to the present invention will be described with reference to FIGS.
【００１０】図１に示される如く、空気入りタイヤ用中
子組立体１０は、周知の如く少なくとも２個以上（本実
施例では３個）の弧状体１１により構成されており、各
弧状体１１の各両端部１１Ａ、１１Ｂをそれぞれ重ね合
わせて連結することにより環状に組立られている。As shown in FIG. 1, a core assembly 10 for a pneumatic tire is composed of at least two or more (three in this embodiment) arc-shaped bodies 11 as is well known. The two ends 11A and 11B are overlapped and connected to form an annular shape.
【００１１】図２に示される如く、空気入りタイヤ用中
子組立体１０を構成する弧状体１１の周方向から見た断
面形状はＩ字状とされており、外殻層２０と中空の内部
層２２とからなるシェル構造になっている。As shown in FIG. 2, the arc-shaped body 11 constituting the pneumatic tire core assembly 10 has an I-shaped cross section viewed from the circumferential direction, and has an outer shell layer 20 and a hollow interior. It has a shell structure including the layer 22.
【００１２】空気入りタイヤ用中子組立体１０の半径方
向内端１０Ａは、空気入りタイヤ１２のビード部１２Ａ
が固着されたリム１４のウエル部１４Ａの外周面に回転
可能に嵌合されている。また、空気入りタイヤ用中子組
立体１０の半径方向外端１０Ｂは空気入りタイヤ１２の
クラウン部１８の内面１８Ａのタイヤ幅方向中央部に対
応している。A radial inner end 10A of the pneumatic tire core assembly 10 is connected to a bead portion 12A of the pneumatic tire 12.
Is rotatably fitted to the outer peripheral surface of the well portion 14A of the rim 14 to which the rim 14 is fixed. The radially outer end 10B of the pneumatic tire core assembly 10 corresponds to the center of the inner surface 18A of the crown 18 of the pneumatic tire 12 in the tire width direction.
【００１３】空気入りタイヤ用中子組立体１０を構成す
る弧状体１１は曲げ弾性率７００００〜１２００００kg
/cm2でアイゾット衝撃値１０〜２５kg/cm2（ノッチ付）
で熱変形温度２２０°Ｃ（１８．５kg/cm2）以上の複合
樹脂材料で構成されている。The arcuate body 11 constituting the core assembly 10 for a pneumatic tire has a flexural modulus of 70,000 to 120,000 kg.
/ cm 2 at the Izod impact value 10~25kg / cm 2 (notched)
And a composite resin material having a heat distortion temperature of 220 ° C. (18.5 kg / cm 2 ) or more.
【００１４】従って、パンクなどで空気入りタイヤ１２
の内圧が低下した場合、タイヤ用中子組立体１０は、空
気入りタイヤ１２を内側から支持してその潰れを阻止
し、内圧低下状態における空気入りタイヤ１２の走行を
可能にする。更に、空気入りタイヤ１２から与えられた
力によりリム１４のウエル部１４Ａ上を滑って回転し、
空気入りタイヤ１２のクラウン部１８の内面１８Ａと空
気入りタイヤ用中子組立体１０の半径方向外端１０Ｂと
の間の摩擦を防止する。Therefore, the pneumatic tire 12 is punctured or the like.
When the internal pressure of the tire decreases, the tire core assembly 10 supports the pneumatic tire 12 from the inside to prevent the pneumatic tire 12 from being collapsed, and allows the pneumatic tire 12 to run in a state where the internal pressure is reduced. Further, the rim 14 rotates by sliding on the well portion 14A of the rim 14 by the force given by the pneumatic tire 12,
Friction between the inner surface 18A of the crown portion 18 of the pneumatic tire 12 and the radially outer end 10B of the pneumatic tire core assembly 10 is prevented.
【００１５】なお、本実施例では、空気入りタイヤ用中
子組立体１０を構成する弧状体１１の周方向から見た断
面形状をＩ字状としたが、弧状体１１の周方向から見た
断面形状はＩ字状に限定されず、図４（Ａ）に示される
如く直線状としても良く。また、図４（Ｂ）に示される
如く逆台形状としても良い。なお、図４（Ｂ）に示され
る如く、弧状体１１の周方向から見た断面形状を逆台形
状とした場合には、中空とされる内部の断面形状も逆台
形状としても良い。In this embodiment, the cross-sectional shape of the arcuate body 11 constituting the pneumatic tire core assembly 10 is I-shaped when viewed from the circumferential direction, but is viewed from the circumferential direction of the arcuate body 11. The cross-sectional shape is not limited to the I-shape, and may be a linear shape as shown in FIG. Further, as shown in FIG. 4B, an inverted trapezoidal shape may be adopted. As shown in FIG. 4 (B), when the cross-sectional shape of the arc-shaped body 11 as viewed from the circumferential direction is an inverted trapezoidal shape, the hollow internal cross-sectional shape may also be an inverted trapezoidal shape.
【００１６】（試験例）高弾性率樹脂としてナイロン６
６ガラス３０％を使用しガス射出成型法を使用して本発
明にかかるシェル構造の弧状体を得た。この弧状体を連
結して中子組立体とし空気入りタイヤのリムに装着した
（タイヤは１９５／７０Ｒ１４であり、リムのサイズは
５ 1/2Ｊ−１４とした）。(Test Example) Nylon 6 as high elastic modulus resin
An arc-shaped body having a shell structure according to the present invention was obtained by using a gas injection molding method using 30% of 6 glasses. The arc-shaped members were connected to form a core assembly, which was mounted on a rim of a pneumatic tire (the tire was 195 / 70R14, and the size of the rim was 51 / 2J-14).
【００１７】この中子組立体を空気入りタイヤの内圧を
０kg/cm2（バルブコアなし）にして、５２０kgの荷重を
作用させながら速度６０km/hで一般路（舗装路）を走行
させ、タイヤ及び中子組立体が故障するまでの距離を測
定した。また、同様に速度だけ４０km/hにして非舗装路
も走行させ、空気入りタイヤ及び中子組立体が故障する
までの距離を測定し、その結果を表１に示した。The core assembly is driven on a general road (paved road) at a speed of 60 km / h while applying a load of 520 kg with the internal pressure of a pneumatic tire being 0 kg / cm 2 (without a valve core). The distance until the core assembly failed was measured. Similarly, the vehicle was run on an unpaved road at a speed of 40 km / h, and the distance until the pneumatic tire and the core assembly failed was measured. The results are shown in Table 1.
【００１８】[0018]
【表１】 [Table 1]
【００１９】この結果、本発明を適用した実施例の中子
組立体は軽量にもかかわらず、充分なランフラツト走行
距離を示した。As a result, the core assembly of the embodiment to which the present invention was applied exhibited a sufficient ranflat running distance despite its light weight.
【００２０】[0020]
【発明の効果】本発明は上記構成としたので、軽量で通
常走行時の操縦安定性を損なうことなく、また、パンク
などにより、空気入りタイヤの内圧が低下した時でも、
比較的長距離の安全走行を可能にするとともに、非舗装
路を走行しても走行距離が著しく低下しないという優れ
た効果を有する。Since the present invention has the above-described structure, it is lightweight and does not impair the steering stability during normal running. Even when the internal pressure of the pneumatic tire is reduced due to puncture, etc.
It has an excellent effect that it enables a relatively long safe driving and that the running distance does not decrease significantly even when running on an unpaved road.
【図１】本発明の一実施例の空気入りタイヤ用中子組立
体を示す斜視図である。FIG. 1 is a perspective view showing a core assembly for a pneumatic tire according to an embodiment of the present invention.
【図２】本発明の一実施例の空気入りタイヤ用中子組立
体が装着された空気入りタイヤを示すタイヤ軸方向に沿
って切断した断面図である。FIG. 2 is a cross-sectional view of the pneumatic tire on which the pneumatic tire core assembly according to one embodiment of the present invention is mounted, taken along the tire axial direction.
【図３】本発明の一実施例の空気入りタイヤ用中子組立
体が装着された空気入りタイヤのランフラツト状態を示
すタイヤ軸方向に沿って切断した断面図である。FIG. 3 is a cross-sectional view along a tire axial direction showing a runflat state of a pneumatic tire to which a core assembly for a pneumatic tire according to an embodiment of the present invention is mounted.
【図４】（Ａ）及び（Ｂ）は本発明の他の実施例の空気
入りタイヤ用中子組立体を示すタイヤ軸方向に沿って切
断した断面図である。FIGS. 4A and 4B are cross-sectional views taken along a tire axial direction showing a pneumatic tire core assembly according to another embodiment of the present invention.
１０ 中子組立体 １０Ａ 半径方向内端 １０Ｂ 半径方向外端 １１ 弧状体 １２ 空気入りタイヤ １４ リム １４Ａ ウエル部 １８ クラウン部 １８Ａ 内面 ２０ 外殻層 ２２ 内部層 DESCRIPTION OF SYMBOLS 10 Core assembly 10A Radial inner end 10B Radial outer end 11 Arc-shaped body 12 Pneumatic tire 14 Rim 14A Well part 18 Crown part 18A Inner surface 20 Outer shell layer 22 Inner layer
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B60C 17/04 - 17/06 ────────────────────────────────────────────────── ─── Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) B60C 17/04-17/06
Claims (2)
せて連結することにより環状に組立られるとともに、空
気入りタイヤを装着したリムのウエル部外側に嵌合さ
れ、空気入りタイヤが内圧低下により潰れて空気入りタ
イヤのクラウン部内面とその半径方向外側とが接触する
ようになると、リムウエル部上を滑って回転する空気入
りタイヤ用中子組立体であって、前記弧状体は曲げ弾性
率７００００〜１２００００kg/cm2の高弾性率樹脂から
なる外殻層と中空の内部層とからなるシェル構造である
ことを特徴とする空気入りタイヤ用中子組立体。At least two arc-shaped members are assembled in an annular shape by overlapping and connecting the ends of the arc-shaped members, and are fitted to the outer side of a well portion of a rim on which a pneumatic tire is mounted. A core assembly for a pneumatic tire that rotates by sliding on a rim well portion when the inner surface of the crown portion of the pneumatic tire comes into contact with the radially outer portion when the inner surface of the crown portion comes into contact with the lower portion. A pneumatic tire core assembly having a shell structure comprising an outer shell layer made of a high elastic modulus resin having a modulus of 70,000 to 120,000 kg / cm 2 and a hollow inner layer.
されていることを特徴とする請求項１に記載の空気入り
タイヤ用中子組立体。 2. The shell structure is manufactured by a gas injection molding method.
The pneumatic device according to claim 1, wherein
Core assembly for tires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20666792A JP3243291B2 (en) | 1992-08-03 | 1992-08-03 | Core assembly for pneumatic tires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20666792A JP3243291B2 (en) | 1992-08-03 | 1992-08-03 | Core assembly for pneumatic tires |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0648125A JPH0648125A (en) | 1994-02-22 |
| JP3243291B2 true JP3243291B2 (en) | 2002-01-07 |
Family
ID=16527139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20666792A Expired - Fee Related JP3243291B2 (en) | 1992-08-03 | 1992-08-03 | Core assembly for pneumatic tires |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3243291B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004026596A1 (en) * | 2002-09-17 | 2004-04-01 | Bridgestone Corporation | Runflat tire support body and method of producing the same, and runflat tire |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69931636T2 (en) | 1998-12-17 | 2007-05-24 | Bridgestone Corp. | TIRE |
| CN104669953B (en) * | 2007-08-09 | 2018-11-23 | 马鞍山市土豪鑫轮胎技术研发有限公司 | A kind of aerated rubber loop inner tube |
-
1992
- 1992-08-03 JP JP20666792A patent/JP3243291B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004026596A1 (en) * | 2002-09-17 | 2004-04-01 | Bridgestone Corporation | Runflat tire support body and method of producing the same, and runflat tire |
| CN100387447C (en) * | 2002-09-17 | 2008-05-14 | 株式会社普利司通 | Runflat tire support body and method of producing the same, and runflat tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0648125A (en) | 1994-02-22 |
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