JPS62268704A - Assembled body of wheel body and tire - Google Patents
Assembled body of wheel body and tireInfo
- Publication number
- JPS62268704A JPS62268704A JP61113199A JP11319986A JPS62268704A JP S62268704 A JPS62268704 A JP S62268704A JP 61113199 A JP61113199 A JP 61113199A JP 11319986 A JP11319986 A JP 11319986A JP S62268704 A JPS62268704 A JP S62268704A
- Authority
- JP
- Japan
- Prior art keywords
- bead
- tire
- bead core
- toe portion
- wheel rim
- 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.)
- Granted
Links
- 239000011324 bead Substances 0.000 claims abstract description 72
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003014 reinforcing effect 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〕
この発明はタイヤの内圧が低下した場合、あるいは急激
なコーナーリングをする場合、タイヤのビード部がリム
から外れることな（安全走行を可能ならしめるタイヤと
車輪リムの組立体に関する。[Detailed Description of the Invention] [Industrial Field of Application] This invention prevents the bead of the tire from coming off the rim (enables safe driving) when the internal pressure of the tire decreases or when cornering occurs sharply. Concerning tire and wheel rim assemblies.
従来、タイヤと車輪リムの組立体においてタイヤビード
部のビード座への保持は、タイヤ内圧の押圧力及びビー
ド座とタイヤビード底部のゴムの摩擦力によってなされ
ている。従ってタイヤ内圧が低下するとこの保持力が小
さくなるが特にパンク時の如く急激な内圧低下に伴い急
激にハンドルをきると旋回運動に伴う横方向力が生じビ
ード部から外れ不安定な状態となる。特にタイヤ取付け
の為に備えられるウェルを有するリムの場合タイヤはリ
ムから完全に外れてしまい重大な事故を招来するという
危険を伴う、つまり、タイヤのビード部のリム外れの機
構は次の如く説明できる。Conventionally, in an assembly of a tire and a wheel rim, the tire bead portion is held on the bead seat by the pressing force of the tire internal pressure and the frictional force between the bead seat and the rubber at the bottom of the tire bead. Therefore, as the internal pressure of the tire decreases, this holding force decreases, but if the steering wheel is suddenly turned due to a sudden decrease in internal pressure, such as in the case of a flat tire, a lateral force is generated due to the turning movement, causing the tire to come off the bead and become unstable. In particular, in the case of a rim with a well provided for mounting the tire, there is a danger that the tire may completely come off the rim, resulting in a serious accident.In other words, the mechanism by which the tire bead comes off the rim is explained as follows can.
車両の運転においてコーナリングをする時生ずる横方向
力は、トレッド部を車輪リムに対し横方向にずれ変形を
生ずるが、この変形はカーカスからビード部へと伝達さ
れる。その結果タイヤ接地部付近には軸方向（横方向）
の力と、ビードにおける円周線を中心とする回転モーメ
ントが生ずるのである。Lateral forces that occur when cornering when driving a vehicle cause the tread portion to shift laterally with respect to the wheel rim, and this deformation is transmitted from the carcass to the bead portion. As a result, near the tire contact area, there is an axial (lateral)
This results in a force and a moment of rotation about the circumference of the bead.
このとき、タイヤ内圧が低い場合には前記力はと一ド部
のヒールを持ち上げるため、ビード部保持力であるビー
ド底部とビード座間の摩擦力が小さくなる。その結果ビ
ード部はテーパ状のビード座を軸方向内側に移動し、こ
の移動に伴い、ビードコアの張力も小さくなるのでビー
ド部保持力は急激になくなってしまいビード部はウェル
内に落ち込むことになる。この問題を解決する為、ウェ
ルのないリムの使用、あるいはビードトウに当接する部
分に突起（ハンプ）を形成しビード部の軸向内側への移
動を防止したリムの使用、あるいはビード座の中に突起
（ハンプ）を設けるとともに該突起（ハンプ）と嵌合す
る環状溝をタイヤのビード底部に形成したタイヤリムと
の組立体（特開昭４９−１３８０２号）が提唱されてい
る。At this time, when the tire internal pressure is low, the force lifts the heel of the bead portion, so the frictional force between the bead bottom and the bead seat, which is the bead holding force, becomes small. As a result, the bead portion moves inward in the axial direction on the tapered bead seat, and with this movement, the tension in the bead core also decreases, so the bead holding force suddenly disappears and the bead portion falls into the well. . To solve this problem, it is possible to use a rim without a well, a rim with a hump formed in the part that contacts the bead toe to prevent the bead from moving inward in the axial direction, or a rim with a bead seat. A tire rim assembly has been proposed (Japanese Unexamined Patent Publication No. 13802/1983) in which a protrusion (hump) is provided and an annular groove that fits into the protrusion (hump) is formed at the bottom of the bead of the tire.
しかしこの技術は、ビード座に突起を形成することによ
りタイヤの取付は取外しに問題があり、又内圧低下時に
急激な横方向力が加わった場合、ビード保持効果が充分
でない。However, this technique has problems in mounting and removing the tire due to the formation of protrusions on the bead seat, and also does not have a sufficient bead retention effect when a sudden lateral force is applied when the internal pressure decreases.
本発明は、タイヤ内圧の低下の際において効果的にタイ
ヤビード部の保持機構を維持しうる車輪リムおよび該車
輪リムとタイヤの組立体を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a wheel rim and an assembly of the wheel rim and tire that can effectively maintain a tire bead holding mechanism when the tire internal pressure decreases.
本発明は１対のビードを有するチューブレスのタイヤと
タイヤ取付は用のウェルを有する車輪リムとからなる組
立体において、前記タイヤの少なくとも一方のビード部
は非伸長性のビードコアと、該ビードコアの軸線方向内
側でかつ半径方向内側に向かって延びるトウ部分と、該
トウ部分を備えかつヒール端からビードコア中心迄の距
ｍＷ４に対するヒール端からトウ部分端迄の距離Ｗ６が
２゜５〜３．５倍に構成されており、一方前記車輪リム
は前記トウ部分の先端を受ける環状溝が形成されている
ことを特徴とする車輪リムとタイヤの組立体である
以下、図面に従ってこの発明の実施例を詳細に説明する
。The present invention provides an assembly comprising a tubeless tire having a pair of beads and a wheel rim having a well for mounting the tire, wherein at least one bead portion of the tire has a non-stretchable bead core, and an axis of the bead core. A toe portion extending inward in the direction and inward in the radial direction, and a distance W6 from the heel end to the end of the toe portion is 2°5 to 3.5 times the distance mW4 from the heel end to the center of the bead core. A wheel rim and tire assembly characterized in that the wheel rim is formed with an annular groove for receiving the tip of the toe portion.Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Explain.
第１図はこの発明の車輪リム１０とタイヤ１１の組立体
の部分断面図である。図においてタイヤ１１のビードは
非伸長性ビードコア１２と、該ビードコア１２の軸線方
向内側で半径方向内側に向かって延びるｉ・つ部分１３
とを備えている。前記トウ部分１３は車輪リム１０の環
状溝３と嵌合するため、トウ部分１３の形状、寸法はそ
れぞれ環状溝３に対応して形成される必要がある。なお
図示していないがビード部には従来タイヤと同様ビード
エペックス、ビード補強層チェーファーガその用途に応
じて通用できることは勿論であり、前記トウ部分１３の
ゴムは比較的硬いゴム例えばＪＩＳＡ硬度で７０°〜８
５°の範囲のものが好ましい。FIG. 1 is a partial sectional view of a wheel rim 10 and tire 11 assembly according to the present invention. In the figure, the bead of a tire 11 includes a non-stretchable bead core 12 and an i-shaped portion 13 extending radially inward on the axially inner side of the bead core 12.
It is equipped with Since the toe portion 13 fits into the annular groove 3 of the wheel rim 10, the shape and dimensions of the toe portion 13 must correspond to the annular groove 3, respectively. Although not shown in the drawings, it goes without saying that the bead part may be made of bead Epex or bead reinforcing layer Chaferga similar to conventional tires, depending on the application, and the rubber of the toe part 13 is a relatively hard rubber, for example, JISA hardness 70. °~8
A range of 5° is preferred.
又前記ビードコア１２は従来のタイヤよりも軸線方向外
側に位置しているのが特徴で例えばヒール端Ｊからビー
ドコア１２中心までの距ｉ？１ｌｉＷ４に対してヒール
端Ｊからトウ部分１３の端Ｎ迄の距シ１１Ｗ６の２．５
〜３．５倍、好ましくは２．９〜３．２倍の範囲に形成
されている。従来のタイヤでは上記数値はせいぜい２．
２倍程度でありミ本発明の如くこの数値を大きくするこ
とによりビードコア１２をリムフランジ６に近づけるこ
とが可能となり車輪リム１０との嵌合を一層強固に保持
しろる。なおヒール端Ｊはビード外側面Ｑとビード基底
部表面Ｍのそれぞれの延長線上の交点Ｔとして定義され
る０次に前記トウ部分１３の端Ｎは、ビード基底部表面
Ｍよりも半径方向内方に突出していることが必要であり
その突出ｆｆ１Ｌは通用されるタイヤの用途、サイズに
よって任意に選定しうる。Also, the bead core 12 is characterized by being located on the outer side in the axial direction than conventional tires, and for example, the distance i? from the heel end J to the center of the bead core 12? 1liW4, the distance from the heel end J to the end N of the toe portion 13 is 2.5 of 11W6.
~3.5 times, preferably 2.9 to 3.2 times. For conventional tires, the above value is at most 2.
By increasing this value as in the present invention, it is possible to bring the bead core 12 closer to the rim flange 6, and the fit with the wheel rim 10 can be held even more firmly. The heel end J is defined as the intersection T on the respective extension lines of the bead outer surface Q and the bead base surface M. Next, the end N of the toe portion 13 is located radially inward from the bead base surface M. It is necessary that the protrusion ff1L protrudes from the tire, and the protrusion ff1L can be arbitrarily selected depending on the intended use and size of the tire.
なお本発明のタイヤのビード基底部には前記トつ部分の
軸線方向外側にタイヤ周方向に延びるハンプ溝１４を形
成することができ、この場合ハンプ４を形成した車輪リ
ムとの嵌合に適する。但しハンプ溝１４を形成したタイ
ヤはハンプ４のない車輪リムにも同様に適用しうる。こ
の場合ヒール端Ｊからビードコア１２中心迄の距離Ｗ４
の２．１〜２．５倍の範囲に設定される。Note that a hump groove 14 extending in the tire circumferential direction can be formed at the bead base of the tire of the present invention on the axially outer side of the toe portion, and in this case, it is suitable for fitting with a wheel rim on which the hump 4 is formed. . However, the tire with the hump groove 14 formed therein can be similarly applied to a wheel rim without the hump 4. In this case, the distance W4 from the heel end J to the center of the bead core 12
is set in a range of 2.1 to 2.5 times.
第２図は本発明に用いられる車輪リムの部分断面図を示
す０図において車輪リム１０はタイヤを取り付けるため
のウェル２を備えており、このウェル２の軸線方向外側
に隣設してタイヤ周方向にのびる環状溝３が形成され、
この環状溝３の軸線方向外側はビード座５、更にリムフ
ランジ６が形成されている。ここで環状溝３の内側に形
成される内側突起７のビード座５から高さｈは好ましく
は５鰭以下であり、前記環状溝３のビード座５からの深
さＤは好ましくは１０龍以下である。なお前記第２図に
おいて、環状溝３の軸線方向内１りに位置する内側突起
７は前ビード座５より外側に突出しているが、第３図の
如く逆に段差にだけ内側に位置するように設けることに
よってタイヤビード部の取付を容易にすることができる
。又前記ビード座５は第４図に示す如く軸線方向Ｍに対
して一定角度（α）のテーパ状として形成することが可
能である。又本発明では環状溝の溝底３ｅはビード座５
よりも半径方向内方に位置することが必要である。FIG. 2 shows a partial sectional view of a wheel rim used in the present invention. In FIG. An annular groove 3 extending in the direction is formed,
A bead seat 5 and a rim flange 6 are formed on the outer side of the annular groove 3 in the axial direction. Here, the height h of the inner protrusion 7 formed inside the annular groove 3 from the bead seat 5 is preferably 5 fins or less, and the depth D of the annular groove 3 from the bead seat 5 is preferably 10 fins or less. It is. In FIG. 2, the inner protrusion 7 located in the axial direction of the annular groove 3 protrudes outward from the front bead seat 5, but as shown in FIG. By providing the tire bead part in the tire bead part, the tire bead part can be easily attached. Further, the bead seat 5 can be formed into a tapered shape at a constant angle (α) with respect to the axial direction M, as shown in FIG. Further, in the present invention, the groove bottom 3e of the annular groove is the bead seat 5.
It is necessary to be located radially inward than the
第５図はこの発明の組立体の断面図を示し、両側のビー
ド部に前述の特殊構造を採用したものである。しかし片
方のビード部にのみ前述の特殊構造を採用しうろことも
勿論である。本発明は乗用車、自動二輪車、三輪車、Ａ
ＴＶ、トラック、バス等各種車両に適用しうる。FIG. 5 shows a sectional view of the assembly of the present invention, in which the above-mentioned special structure is adopted for the bead portions on both sides. However, it is of course possible to adopt the above-mentioned special structure only in one bead portion. The present invention applies to passenger cars, motorcycles, tricycles, A
It can be applied to various vehicles such as TVs, trucks, and buses.
前述の如く本発明の車輪リムとタイヤの組立体はトウ部
分と嵌合する環状溝を設けるとともに、ビードコアの位
置をリムフランジ側に大きく近づけたため、内圧低下時
に、横方向の力が作用してもビード部の保持機能が一層
強化される。As mentioned above, the wheel rim and tire assembly of the present invention is provided with an annular groove that fits into the toe portion, and the bead core is positioned very close to the rim flange side, so that when the internal pressure decreases, lateral force acts. The holding function of the bead part is further strengthened.
第１図は本発明の組立体の部分断面図、第２〜４図は本
発明で用いられる車輪リムの部分断面図、第５図は本発
明の組立体の断面図を示す。
２・−・ウェル、 ３・・・環状溝、 ４−ハンプ、１
０・−車輪リム、 １１・・・タイヤ、１２−・−ビ
ードコア、 １３・−・Ｉ・つ部分、１４−ハンプ溝
。FIG. 1 is a partial cross-sectional view of an assembly according to the present invention, FIGS. 2-4 are partial cross-sectional views of a wheel rim used in the present invention, and FIG. 5 is a cross-sectional view of the assembly according to the present invention. 2--Well, 3-Annular groove, 4-Hump, 1
0.-Wheel rim, 11.-Tire, 12.--Bead core, 13.--I section, 14-Hump groove.
Claims (1)
ウェルを有する車輪リムとからなる組立体において、前
記タイヤの少なくとも一方のビード部は非伸長性のビー
ドコアの軸線方向内側でかつ半径方向内側に向かっての
びるトウ部分を備えかつヒール端からビードコア中心迄
の距離Ｗ４に対するヒール端からトウ部分端までの距離
Ｗ６は２．５〜３．５倍に構成されており、一方前記車
輪リムは前記トウ部分の先端を受ける環状溝が形成され
ていることを特徴とする車輪リムとタイヤの組立体。(1) In an assembly consisting of a tire having a pair of beads and a wheel rim having a well for mounting the tire, at least one of the bead portions of the tire is axially inner and radially inner than a non-stretchable bead core. The wheel rim has a toe portion extending inward, and the distance W6 from the heel end to the toe portion end is 2.5 to 3.5 times the distance W4 from the heel end to the center of the bead core. A wheel rim and tire assembly, characterized in that an annular groove is formed to receive the tip of the toe portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61113199A JP2633832B2 (en) | 1986-05-16 | 1986-05-16 | Wheel rim and tire assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61113199A JP2633832B2 (en) | 1986-05-16 | 1986-05-16 | Wheel rim and tire assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62268704A true JPS62268704A (en) | 1987-11-21 |
| JP2633832B2 JP2633832B2 (en) | 1997-07-23 |
Family
ID=14606063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61113199A Expired - Lifetime JP2633832B2 (en) | 1986-05-16 | 1986-05-16 | Wheel rim and tire assembly |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2633832B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62158299A (en) * | 1985-12-23 | 1987-07-14 | イー・アイ・デュポン・ドゥ・ヌムール・アンド・カンパニー | Alabinonucleic acid probe for dna/rna assay |
| JPH01145208A (en) * | 1987-11-30 | 1989-06-07 | Sumitomo Rubber Ind Ltd | Assembly body of run flat tire for atv and rim |
| JPH01278806A (en) * | 1988-05-02 | 1989-11-09 | Sumitomo Rubber Ind Ltd | Safe tire |
| US5139067A (en) * | 1988-12-29 | 1992-08-18 | Bridgestone Corporation | Tire wheel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS532804A (en) * | 1976-06-04 | 1978-01-12 | Dunlop Co Ltd | Pneumatic tire and wheel rim assembly |
| JPS54113103A (en) * | 1978-01-21 | 1979-09-04 | Dunlop Co Ltd | Wheel rim |
| JPS58145508A (en) * | 1981-10-07 | 1983-08-30 | Sumitomo Rubber Ind Ltd | Tire-rim assembly for motorcycle |
-
1986
- 1986-05-16 JP JP61113199A patent/JP2633832B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS532804A (en) * | 1976-06-04 | 1978-01-12 | Dunlop Co Ltd | Pneumatic tire and wheel rim assembly |
| JPS54113103A (en) * | 1978-01-21 | 1979-09-04 | Dunlop Co Ltd | Wheel rim |
| JPS58145508A (en) * | 1981-10-07 | 1983-08-30 | Sumitomo Rubber Ind Ltd | Tire-rim assembly for motorcycle |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62158299A (en) * | 1985-12-23 | 1987-07-14 | イー・アイ・デュポン・ドゥ・ヌムール・アンド・カンパニー | Alabinonucleic acid probe for dna/rna assay |
| JPH0529439B2 (en) * | 1985-12-23 | 1993-04-30 | Ii Ai Deyuhon De Nimoasu Ando Co | |
| JPH01145208A (en) * | 1987-11-30 | 1989-06-07 | Sumitomo Rubber Ind Ltd | Assembly body of run flat tire for atv and rim |
| JPH01278806A (en) * | 1988-05-02 | 1989-11-09 | Sumitomo Rubber Ind Ltd | Safe tire |
| US5139067A (en) * | 1988-12-29 | 1992-08-18 | Bridgestone Corporation | Tire wheel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2633832B2 (en) | 1997-07-23 |
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