JPH0440207B2 - - Google Patents
Info
- Publication number
- JPH0440207B2 JPH0440207B2 JP58093185A JP9318583A JPH0440207B2 JP H0440207 B2 JPH0440207 B2 JP H0440207B2 JP 58093185 A JP58093185 A JP 58093185A JP 9318583 A JP9318583 A JP 9318583A JP H0440207 B2 JPH0440207 B2 JP H0440207B2
- Authority
- JP
- Japan
- Prior art keywords
- rim
- bead
- tire
- bead seat
- fitting groove
- 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 - Lifetime
Links
- 239000011324 bead Substances 0.000 claims description 45
- 230000007423 decrease Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920001875 Ebonite Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/0009—Tyre beads, e.g. ply turn-up or overlap features of the carcass terminal portion
- B60C15/0081—Tyre beads, e.g. ply turn-up or overlap features of the carcass terminal portion the carcass plies folded around or between more than one bead core
-
- 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
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/02—Seating or securing beads on rims
- B60C15/0209—Supplementary means for securing the bead
- B60C15/0226—Supplementary means for securing the bead the bead being secured by protrusions of the rim extending from the bead seat, e.g. hump or serrations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Description
【発明の詳細な説明】
本発明は、走行中にパンク等で内圧が低下した
場合にもタイヤとリムとの嵌合外れを防止でき、
安全性を向上させたモーターサイクル用タイヤと
リムの組立体に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention can prevent the tire from disengaging from the rim even if the internal pressure decreases due to a puncture or the like while driving.
Concerning a motorcycle tire and rim assembly with improved safety.
従来、モーターサイクル用タイヤとリムの組立
体においては、タイヤ内部の空気圧により、タイ
ヤビード部の底面及び外側面を、リムのビード座
及びリムフランジに押圧することによつて、タイ
ヤビード部をリムに固定している。従つてタイヤ
の内圧が低下すると、その保持力は低下し、特に
パンク等で内圧が急激に減少した場合には、ハン
ドル操作による横方向力を加わつてタイヤのビー
ド部がリムから外れ、安全性を損なう。 Conventionally, in the assembly of a motorcycle tire and rim, the bottom and outer surfaces of the tire bead are pressed against the bead seat and rim flange of the rim using air pressure inside the tire. It is fixed at Therefore, when the internal pressure of the tire decreases, its holding power decreases, and especially if the internal pressure decreases rapidly due to a puncture, etc., the lateral force applied by steering wheel operation can cause the tire bead to come off the rim, resulting in safety issues. damage.
特にモーターサイクル用タイヤにおいてはコー
ナリングの際に車輪は大きく傾斜し、この傾斜を
回復する方向へ働くキヤンバースラストによつて
ビード部にタイヤ内側方向に押圧力が作用するた
め、特に外れやすいものとなる。 Particularly in motorcycle tires, when cornering, the wheel tilts significantly, and the camber thrust, which works in the direction of recovering this tilt, applies pressure to the bead inward of the tire, making it particularly easy for the wheel to come off. Become.
本発明は、急激な内圧低下が生じても安全走行
をなしうるようにしたモーターサイクル用タイヤ
とリムの組立体の提供を目的とし、本発明は、タ
イヤのビード部に突起状のトウ部とリブとを形成
し、かつリムに、ビード座の軸方向内方端の嵌合
溝とリムフランジ下辺部の凹溝とを夫々形成する
ことを基本としている。 An object of the present invention is to provide a motorcycle tire and rim assembly that enables safe running even when a sudden drop in internal pressure occurs. The rim is basically formed with a fitting groove at the axially inner end of the bead seat and a concave groove at the lower side of the rim flange.
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、モータサイクル用タイヤ（以下タ
イヤという）１は、トレツド部５からサイドウオ
ール部をへてビード部９のビードコア３でタイヤ
内側から外側に折返す折返し部４ａを有するトロ
イド状のカーカス４と、トレツド部５の内方かつ
前記カーカス４の外側に配されるベルト層６とを
有し、又本例では折返し部４ａは、トレツド部５
の両側近傍で終端している。 In the figure, a motorcycle tire (hereinafter referred to as a tire) 1 has a toroidal carcass 4 having a folded part 4a that extends from a tread part 5 through a sidewall part and is folded back from the inside of the tire to the outside at a bead core 3 of a bead part 9. , a belt layer 6 disposed inside the tread portion 5 and outside the carcass 4, and in this example, the folded portion 4a has a belt layer 6 disposed inside the tread portion 5 and outside the carcass 4.
It terminates near both sides of.
タイヤ１は、前記ビード部９の底面をリム２の
ビード座１２に着座させかつビード部９の軸方向
外面をリム２のリムフランジ１３に支持させるこ
とにより、該リム２に装着されタイヤ１とリム２
との組立体を形成している。 The tire 1 is mounted on the rim 2 by seating the bottom surface of the bead portion 9 on the bead seat 12 of the rim 2 and supporting the axially outer surface of the bead portion 9 on the rim flange 13 of the rim 2. Rim 2
It forms an assembly with.
またビード部９には、軸方向内端に、突起状の
トウ部７，７が全周に亘つて形成されるととも
に、ビード部９には、トウ部７と反対側のヒール
部の外面、即ちビード部の軸方向外面に、その下
辺部で周方向にのびるリブ１０が形成される。 Further, the bead portion 9 has protruding toe portions 7, 7 formed all around the inner end in the axial direction. That is, a rib 10 extending in the circumferential direction is formed on the outer surface of the bead portion in the axial direction at the lower side thereof.
突起状の前記トウ部７は、ビードコア３から半
径方向内向きかつ軸方向内端に延在しており、周
方向と直角な方向に所定の柔軟性を有することに
よつてリム２との嵌合を容易にしかつ周方向には
剛性を有している。 The protruding toe portion 7 extends radially inward and axially from the bead core 3 to the inner end in the axial direction, and has a predetermined flexibility in a direction perpendicular to the circumferential direction, thereby making it easy to fit into the rim 2. It is easy to fit and has rigidity in the circumferential direction.
トウ部７として、JISA硬度が65°〜95°のエラス
トマー材料が使用され、又好ましくは第２図に示
すごとく、突起状のトウ部７の外輪郭線に沿つて
ビード部９内側から外側に亘る繊維層８で補強す
る。 An elastomer material having a JISA hardness of 65° to 95° is used as the toe portion 7, and preferably, as shown in FIG. It is reinforced with a fiber layer 8 extending over it.
なお突起状のトウ部７は、第１図に示すごと
く、単一エラストマー材料で構成するほか、第２
図に示すごとく周囲のエラストマー材料より硬度
の高い硬質ゴム、プラスチツクあるいは繊維の束
よりなる環状の芯部７ａを配置してもよく、この
場合リム２との嵌合は一層強固なものとなる。 The protruding tow portion 7 may be made of a single elastomer material as shown in FIG.
As shown in the figure, an annular core 7a made of hard rubber, plastic, or a bundle of fibers, which is harder than the surrounding elastomer material, may be arranged, in which case the fit with the rim 2 will be even stronger.
前記リム２は、第３図に示されるごとく、該リ
ム２の中央部に凹接されるリムウエル１１と、該
リムウエル１１の両端に連結する一対のビード座
１２と、更に該ビード座１２の両端で軸方向かつ
半径方向外方に配置されるリムフランジ１３とを
具え、ビード座１２は、該ビード座１２の軸方向
内方端ａに隣接して周方向に延在する嵌合溝１５
を備えている。また前記ビード部１２は、軸方向
外方から嵌合溝１５の底部にかけて滑らかな連続
した下降傾斜を形成し、嵌合溝１５底部からビー
ド座１２の軸方向内方端ａにかけて急激な上昇傾
斜を形成する。 As shown in FIG. 3, the rim 2 includes a rim well 11 that is in concave contact with the center of the rim 2, a pair of bead seats 12 connected to both ends of the rim well 11, and a pair of bead seats 12 connected to both ends of the bead seats 12. and a rim flange 13 disposed axially and radially outwardly, and the bead seat 12 has a fitting groove 15 extending circumferentially adjacent to the axially inner end a of the bead seat 12.
It is equipped with Furthermore, the bead portion 12 forms a smooth continuous downward slope from the axially outer side to the bottom of the fitting groove 15, and has a steep upward slope from the bottom of the fitting groove 15 to the axially inner end a of the bead seat 12. form.
前記トウ部７は嵌合溝１５底部と当接し互いに
嵌合する。これによつてトレツド部５にかかる軸
方向内向きの力がビード部分に伝達されると、半
径方向かつ軸方向外方の応力がビードコア３及び
前記突起状のトウ部７に生じ、その結果ビード部
９とリム２の嵌合を前記嵌合溝１５により一層強
固なものとする。 The toe portion 7 contacts the bottom of the fitting groove 15 and fits into each other. As a result, when the axially inward force applied to the tread portion 5 is transmitted to the bead portion, radial and axially outward stress is generated in the bead core 3 and the protruding toe portion 7, resulting in the bead The fitting between the portion 9 and the rim 2 is further strengthened by the fitting groove 15.
このため、ビード座１２の底部の長さWBは嵌
合溝１５の中央部からビード座１２の軸方向外方
端までの距離とほぼ一致し、嵌合溝１５とトウ部
７との嵌合を良好とする。 Therefore, the length WB of the bottom of the bead seat 12 is approximately equal to the distance from the center of the fitting groove 15 to the axially outer end of the bead seat 12, and the fitting groove 15 and the toe portion 7 are is considered good.
またリムフランジ１３の下辺部、本例ではビー
ド座１２との交わり部の内側には、周方向にのび
かつ前記リブ１０と嵌合するための凹溝１６が、
該リムフランジ１３を軸方向外側に凹ませること
により形成されている。 Further, on the lower side of the rim flange 13, in this example, on the inner side of the intersection with the bead seat 12, there is a groove 16 extending in the circumferential direction and fitting with the rib 10.
It is formed by recessing the rim flange 13 axially outward.
又凹溝１６の巾Ｗは３〜10mm、深さＤは0.5〜
1.5mmであつて、従つて前記リブ１０もこの深さ
Ｄに応じて、該凹溝１６に嵌入するように突出代
が定められる。又深さＤが0.5mmに近づくときに
は、リブ１０の突出代は第２図に示すように比較
的僅少となる。又前記幅Ｗを余り広くするとチユ
ーブレスタイヤとして使用する場合、内圧空気保
持性が低下し、また過小であるとリム外れの防止
効果が減じる。 Also, the width W of the groove 16 is 3 to 10 mm, and the depth D is 0.5 to 10 mm.
The depth D is 1.5 mm, and accordingly, the protrusion margin of the rib 10 is determined in accordance with this depth D so that the rib 10 fits into the groove 16. Further, when the depth D approaches 0.5 mm, the protrusion of the rib 10 becomes relatively small as shown in FIG. Moreover, if the width W is too wide, the internal pressure air retention property will be reduced when used as a tubeless tire, and if it is too small, the effect of preventing rim detachment will be reduced.
さらにリブ１０と凹溝１６とが嵌合することと
により、タイヤのリムはずれに際して、ビード部
が前記トウ部７の先端を中心として回動ヒール部
が浮き上がるのを、ビード部の軸方向外面におい
て阻止することなり、その結果、リムはずれを抑
制しうる。 Furthermore, by fitting the rib 10 and the concave groove 16, when the tire rim is dislocated, the bead part rotates around the tip of the toe part 7, and the heel part lifts up. As a result, the rim can be prevented from slipping.
なお前記タイヤ１のリム２への装着は、通常の
タイヤとリムと同様に行うことができる。例えば
第１図においてビード部９をリムフランジ１３を
越えリムウエル１１にはめこんだ後、空気バルブ
１７から空気を充填することにより、ビード部９
は内圧でビード座１２及びリムフランジ１３方向
に押付けられ、突起状のトウ部７は嵌合溝１５内
に押入され、ビード部９はリム２に強固に保持さ
れ、かつリブ１０が凹溝１６に嵌合する。 Note that the tire 1 can be attached to the rim 2 in the same way as a normal tire and rim. For example, in FIG. 1, after the bead portion 9 is fitted into the rim well 11 beyond the rim flange 13, the bead portion 9 is filled with air from the air valve 17.
is pressed toward the bead seat 12 and the rim flange 13 by internal pressure, the protruding toe portion 7 is pushed into the fitting groove 15, the bead portion 9 is firmly held on the rim 2, and the rib 10 is pushed into the groove 16. Fits in.
なお前記カーカス４としては、ナイロン、ポリ
エステル、レーヨン、芳香族ポリアミド繊維等の
有機繊維のコードを平行に引揃えたプライを、少
なくとも２枚、プライ間コードが相互に交差する
ように配置したいわゆるクロスプライ構造あるい
は前記プライの１枚以上をタイヤ赤道面に対して
80°以内の角度で配置したラジアル構造にも形成
できる。なお第１図ではラジアル構造のものを示
す。 The carcass 4 is a so-called cross made of at least two plies of organic fiber cords such as nylon, polyester, rayon, aromatic polyamide fibers, etc., arranged in parallel so that the cords between the plies intersect with each other. Ply structure or one or more of the plies to the tire equatorial plane
It can also be formed into a radial structure arranged at an angle of up to 80°. Note that FIG. 1 shows a radial structure.
次に前記ベルト層６は、通常スチールコードで
構成され、該コードはタイヤ赤道面に対して10°
〜30°の範囲で傾斜して配置されるとともに、そ
の幅はトレツド全幅に亘つている。このベルト層
６の配置によりタイヤ接地面の剛性が改善され、
直進走行時に安定性が確保される。なおこのベル
ト層６はクロスプライ構造のタイヤでは必ずしも
必要としない。 Next, the belt layer 6 is usually composed of a steel cord, and the cord is oriented at an angle of 10° to the tire equatorial plane.
It is inclined at an angle of ~30° and its width spans the entire width of the tread. The arrangement of this belt layer 6 improves the rigidity of the tire contact patch,
Stability is ensured when driving straight. Note that this belt layer 6 is not necessarily required in a tire with a cross-ply structure.
このように、本発明のモーターサイクル用タイ
ヤとリムの組立体は、リムに嵌合溝及び凹溝を設
ける一方、タイヤビード部には、前記嵌合溝に嵌
着する突起状のトウ部と、凹溝に嵌合するリブと
を設けたため、両者の嵌合が一層強化され、内圧
低下時、また車輪を大きく傾斜して走行してもリ
ム外えを効果的に減じうる。 As described above, in the motorcycle tire and rim assembly of the present invention, the rim is provided with a fitting groove and a concave groove, and the tire bead portion is provided with a protruding toe portion that fits into the fitting groove. , and a rib that fits into the concave groove, the fit between the two is further strengthened, and rim dislodgement can be effectively reduced even when the internal pressure is low or when the wheel is driven at a large incline.
第１図は本発明の組立体の一実施例を示す断面
図、第２図はビード部の一部断面図、第３図はリ
ムの部分斜視図である。
１……タイヤ外皮、２……リム、３……ビード
コア、４……カーカス、５……トレツド部、６…
…ベルト層、７……トウ部、９……ビード部、１
０……リブ、１２……ビード座、１３……リムフ
ランジ、１５……嵌合溝、１６……凹溝。
FIG. 1 is a sectional view showing one embodiment of the assembly of the present invention, FIG. 2 is a partial sectional view of the bead portion, and FIG. 3 is a partial perspective view of the rim. 1... Tire outer skin, 2... Rim, 3... Bead core, 4... Carcass, 5... Tread portion, 6...
...Belt layer, 7...Tow part, 9...Bead part, 1
0... Rib, 12... Bead seat, 13... Rim flange, 15... Fitting groove, 16... Concave groove.
Claims (1)
ムフランジとを有し前記ビード座により前記タイ
ヤのビード部の底面を受けかつリムフランジによ
りビード部の軸方向外面を支持することによつて
前記タイヤを装着するリムからなるモーターサイ
クル用タイヤとリムの組立体において、 前記タイヤのビード部の軸方向内端に突起状の
トウ部を設けかつ該ビード部の軸方向外面かつ下
辺部に周方向にのびるリブを形成するとともに、 前記リムのビード座に、周方向に延在し前記ト
ウ部が嵌入される嵌合溝を設け、 リムフランジの下辺部に、周方向にのびかつ前
記リブが嵌入される凹溝を前記リムフランジを軸
方向外側に凹ませることにより形成したことを特
徴とするモーターサイクル用タイヤとリムの組立
体。[Scope of Claims] 1. A motorcycle tire, comprising a bead seat and a rim flange, the bead seat receiving the bottom surface of the bead portion of the tire, and the rim flange supporting the axial outer surface of the bead portion. Therefore, in a motorcycle tire and rim assembly comprising a rim on which the tire is mounted, a protruding toe portion is provided at the axially inner end of the bead portion of the tire, and the axially outer surface and lower side of the bead portion is provided. a rib extending in the circumferential direction is formed in the bead seat of the rim, a fitting groove extending in the circumferential direction and into which the toe portion is fitted is provided in the bead seat of the rim, and a fitting groove extending in the circumferential direction and in the lower side of the rim flange is provided in the bead seat of the rim; A motorcycle tire and rim assembly, characterized in that a groove into which the rib is inserted is formed by recessing the rim flange axially outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58093185A JPS59220406A (en) | 1983-05-26 | 1983-05-26 | Assembly of tire and rim for motorcycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58093185A JPS59220406A (en) | 1983-05-26 | 1983-05-26 | Assembly of tire and rim for motorcycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59220406A JPS59220406A (en) | 1984-12-11 |
| JPH0440207B2 true JPH0440207B2 (en) | 1992-07-02 |
Family
ID=14075513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58093185A Granted JPS59220406A (en) | 1983-05-26 | 1983-05-26 | Assembly of tire and rim for motorcycle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59220406A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3780786T2 (en) * | 1986-05-16 | 1992-12-10 | Sumitomo Rubber Ind | RADIAL TIRES AND RIM AND RADIAL TIRE UNIT. |
| JPH089284B2 (en) * | 1992-05-11 | 1996-01-31 | 住友ゴム工業株式会社 | Radial tire and rim assembly for four-wheeled vehicles |
| JP2550284B2 (en) * | 1993-10-06 | 1996-11-06 | 株式会社日立製作所 | Head drive |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5715007A (en) * | 1980-07-02 | 1982-01-26 | Webasto Werk Baier Kg W | Method and apparatus for deciding energy necessary for preheating |
| JPS58145508A (en) * | 1981-10-07 | 1983-08-30 | Sumitomo Rubber Ind Ltd | Tire-rim assembly for motorcycle |
-
1983
- 1983-05-26 JP JP58093185A patent/JPS59220406A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5715007A (en) * | 1980-07-02 | 1982-01-26 | Webasto Werk Baier Kg W | Method and apparatus for deciding energy necessary for preheating |
| JPS58145508A (en) * | 1981-10-07 | 1983-08-30 | Sumitomo Rubber Ind Ltd | Tire-rim assembly for motorcycle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59220406A (en) | 1984-12-11 |
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