JPH02270610A - Pneumatic tire easy to attach - Google Patents

Pneumatic tire easy to attach

Info

Publication number
JPH02270610A
JPH02270610A JP1091725A JP9172589A JPH02270610A JP H02270610 A JPH02270610 A JP H02270610A JP 1091725 A JP1091725 A JP 1091725A JP 9172589 A JP9172589 A JP 9172589A JP H02270610 A JPH02270610 A JP H02270610A
Authority
JP
Japan
Prior art keywords
tire
rim
bead
heel portion
grooves
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
Application number
JP1091725A
Other languages
Japanese (ja)
Inventor
Hideo Hara
原 秀男
Ichiro Takahashi
一郎 高橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP1091725A priority Critical patent/JPH02270610A/en
Publication of JPH02270610A publication Critical patent/JPH02270610A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To make attachment of a tire to a rim easy by forming, on a heel portion of each bead of the tire attached to the rim, a plurality of stripped grooves which is extended in the radial direction of the tire while being apart from each other in the circumferential direction thereof. CONSTITUTION:On a heel portion 26 inserted into a rim 10 of each bead 14 of a tire 12, there is formed a plurality of stripped grooves which are extended in the radial direction of the tire slantly while being apart from each other in the circumferential direction thereof. In this case, the heel portion 26 stands for the part of the bead, except the base 13 and the outside, for airtightly holding the interior of the tire cooperated with the seat 20 and flange 22 of the rim, in the suitable assembling state of the tire 12 to the rim 10. Each stripped groove 28 is formed of side walls 28a which is crossed to the surface of the heel portion 26 and is parallelly apart from each other, and a semi-circular bottom portion 28b connected to respective side walls 28a.

Description

【発明の詳細な説明】 (産業上の利用分野) この発明は、タイヤのリムへの装着を容易なものとした
空気入りタイヤに関するものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pneumatic tire that can be easily mounted on a tire rim.

(従来の技術) タイヤはリムに一体的に装着されて初めてその機能を十
分に発揮するものであり、例えば、第4図に示すリム1
0にタイヤ12を一体的に組み合わせる場合には、まず
、仮想線で示したタイヤ12のビード部14を、リム中
央部の深底部16に落とし込み、次いで、リムに装着さ
れたバルブ(図示せず)を介してタイヤ内部に加圧空気
を適用することにより、タイヤのビード部14をタイヤ
幅方向に互いに離間するよう押し拡げて、そのベース部
18をリムのシート部20に、また、ビード部14の側
面をリムのフランジ部22にそれぞれ押圧し、タイヤ内
圧を気密に保持する構成をしている。
(Prior art) A tire fully demonstrates its function only when it is integrally attached to a rim.For example, the rim 1 shown in FIG.
0 and the tire 12, first, the bead part 14 of the tire 12 shown by the imaginary line is dropped into the deep bottom part 16 at the center of the rim, and then the valve (not shown) attached to the rim is inserted. ) by applying pressurized air inside the tire, the bead portions 14 of the tire are forced apart from each other in the tire width direction, and the base portion 18 is attached to the seat portion 20 of the rim and the bead portion 14 are pressed against the flange portions 22 of the rim, respectively, to maintain the tire internal pressure airtight.

そして、−数的には、リムIOのシート部20には、急
激な車両旋回、パンク等の突発的な事故によりタイヤに
加わる横力により、タイヤ12がリムから外れるのを防
ぐなめ、リムの少なくとも一方のシート部20にハンプ
と呼ばれる突起24が、タイヤ周方向に沿って形成され
ている。
Numerically speaking, the seat portion 20 of the rim IO has a rim plate that prevents the tire 12 from coming off the rim due to lateral forces applied to the tire due to sudden accidents such as sudden vehicle turns or punctures. A protrusion 24 called a hump is formed on at least one seat portion 20 along the tire circumferential direction.

そして、タイヤの内周寸法を規定すると共に、リムに対
するはめ合いを確保してタイヤが外れるのを阻止するた
め、通例、ビード部には、鋼線の束よりなるビードリン
グ、硬質ゴム、チエ−ファー等が用いられているので、
タイヤの他の部分に比してかなり剛固な構造をしている
In order to define the inner circumferential dimensions of the tire and to ensure fit to the rim and prevent the tire from coming off, the bead portion is usually equipped with a bead ring made of a bundle of steel wire, hard rubber, or a chain. Because fur etc. are used,
It has a fairly rigid structure compared to other parts of the tire.

(発明が解決すべき課題) このため、タイヤへの内圧の適用に際しては、剛性の高
い当該ビード部14、具体的には、そのヒ−小部分が、
リム10の深底部16から起立するベース部18に当接
し、タイヤのビード部14のリム10の所定位置への移
動を阻害すると言う問題があった。
(Problem to be Solved by the Invention) Therefore, when applying internal pressure to the tire, the bead portion 14, which has high rigidity, specifically, the small heel portion,
There has been a problem in that the tire bead 14 comes into contact with the base portion 18 rising from the deep bottom portion 16 of the rim 10 and prevents the bead portion 14 of the tire from moving to a predetermined position on the rim 10 .

特に、リムのベース部18に突起24が形成されたもの
にあっては、第4図(b)に模式的に示したように、剛
固なビード部14のヒール部分26が当該突起24を越
えてリムのフランジ部22方向へ移動する必要があるの
で、タイヤのリムへの組み込み作業を、更に困難なもの
としていた。
In particular, in the case of a rim in which a protrusion 24 is formed on the base portion 18, the heel portion 26 of the rigid bead portion 14 touches the protrusion 24, as schematically shown in FIG. 4(b). Since it is necessary to cross the tire and move toward the flange portion 22 of the rim, the task of assembling the tire onto the rim becomes even more difficult.

このことは、また、高速走行時における操縦安定性、+
i4久性、耐摩耗性、更には制動特性等のタイヤ要求性
能の高まりに応えるべく、その接地面積を増大させたタ
イヤ、即ち偏平率の低いタイヤにあっては、その構成上
、ビード部における剛性が一段と高くなることから、−
層顕著な問題となっている。
This also improves steering stability during high-speed driving.
i4In order to meet the increasing performance requirements for tires such as durability, wear resistance, and braking characteristics, tires with increased ground contact area, that is, tires with low profile ratio, have Since the rigidity is further increased, −
This has become a serious problem.

本発明は、このような問題に鑑みてなされたものであり
、リムへの装着を容易に行うことができるタイヤを提供
することをその目的とする。
The present invention has been made in view of such problems, and an object of the present invention is to provide a tire that can be easily mounted on a rim.

(課題を達成するための手段) この課題を達成するため、本発明タイヤにあ・っては、
タイヤのリムへの装着を担保するビード部の少なくとも
一方のヒール部分に、タイヤ半径方向成分を有しその周
方向に相互に離間して延在する複数の条溝を形成してな
る。
(Means for achieving the object) In order to achieve this object, the tire of the present invention has the following features:
A plurality of grooves having a radial component of the tire and extending spaced apart from each other in the circumferential direction are formed in at least one heel portion of the bead portion that ensures attachment of the tire to the rim.

(作用) タイヤのリムへの組み込みに際し、ビード部のヒール部
分に、タイヤ半径方向成分を有しその周方向に相互に離
間して延在する複数の条溝を形成することにより、リム
に当接しその組み込みを阻害する当該ビード部のヒール
部分のリムに対する実質的な接触面積が低減するので、
リム及びそれに当接するタイヤのビード部分との間に生
起される摩擦力を小さなものとすることができ、タイヤ
のリムへの組み込み作業を容易なものとする。
(Function) When assembling a tire onto a rim, a plurality of grooves having a radial component of the tire and extending apart from each other in the circumferential direction are formed in the heel portion of the bead to prevent the tire from coming into contact with the rim. Since the substantial contact area of the heel portion of the bead portion against the rim, which interferes with its incorporation, is reduced,
The frictional force generated between the rim and the bead portion of the tire in contact with the rim can be reduced, and the work of assembling the tire onto the rim can be facilitated.

(実施例) 以下図面を参照して本発明に係るタイヤの好適な実施例
について詳述する。
(Example) Preferred examples of the tire according to the present invention will be described in detail below with reference to the drawings.

第1図に示す、本発明に係るタイヤ12は、いわゆるラ
ジアル構造をしている。しかしながら、その構造は、本
発明に直接的に関係し2ないので、説明を簡略にするた
め、その詳しい説明はここでは省略し、本発明に直接的
に関係するビード部14のみ実線で示すこととする。
A tire 12 according to the present invention shown in FIG. 1 has a so-called radial structure. However, since its structure is not directly related to the present invention, in order to simplify the explanation, a detailed explanation thereof will be omitted here, and only the bead portion 14 that is directly related to the present invention will be shown with a solid line. shall be.

タイヤ12のビード部14は、図示しないリムとのはめ
合いを確保するそのヒール部分26に、タイヤI2の半
径方向に対して傾斜して延在するとともに、その周方向
に相互に離間する複数の条溝28が形成されている。
The bead portion 14 of the tire 12 has a plurality of heel portions 26 extending at an angle with respect to the radial direction of the tire I2 and spaced apart from each other in the circumferential direction at a heel portion 26 that ensures fit with a rim (not shown). A groove 28 is formed.

ここで、タイヤ12のビード部14におけるヒール部分
26とは、線A−Aに沿う断面を示す同図(b)に明示
したように、タイヤ12がリム10に適正に組み込まれ
た状態において、リムのシート部20及びフランジ部2
2に協働してタイヤ内部12aを気密に保持するビード
部のベース部18及びビード部の外側部分を除いた部分
を指すものであり、換言すれば、タイヤをリムに適正に
組み込んだ状態において、リム10のフランジ部22及
びシート部20との連結部分に対向して位置するものの
、当該連結部分に接触してタイヤ内部12aを気密に保
持することがない部分を指すものとする。
Here, the heel portion 26 of the bead portion 14 of the tire 12 refers to the heel portion 26 when the tire 12 is properly assembled into the rim 10, as shown in FIG. Seat part 20 and flange part 2 of the rim
This refers to the part excluding the base part 18 of the bead part and the outer part of the bead part, which cooperate with the tire inner part 12a to keep the tire interior 12a airtight.In other words, when the tire is properly assembled into the rim, , refers to a portion that is located opposite the connecting portion between the flange portion 22 and the seat portion 20 of the rim 10, but does not contact the connecting portion to maintain the tire interior 12a airtight.

それゆえ、条溝28が形成されたヒール部分26をを配
設したとしても、タイヤのビード部I4とリムのフラン
ジ部22及びシート部20との間のシールが阻害される
ことはない。
Therefore, even if the heel portion 26 in which the grooves 28 are formed is provided, the sealing between the bead portion I4 of the tire and the flange portion 22 and seat portion 20 of the rim is not impaired.

ところで条溝28は、本実施例にあっては、第1図(c
)に示したように、ヒール部分26の表面にほぼ直交し
て互いに平行に離間するする側壁28aと、それら側壁
に接続する半円形形状の底部28bとを具備するものと
したが、この形状に限定されるものではなく、三角形断
面、半円形断面、また、ヒール部分26の表面に対して
斜交する側壁を有する形状をした溝孔、更にはそれらと
異なり、ヒール部分26の表面に形成した突条等も含む
ものであり、形状及びその深さ若しくはその高さは、タ
イヤ及びそれが組み込まれるリムの仕様に合わせて適宜
変更することができるものであって、リムとの接触面積
を低減することができるものであれば良い。
By the way, the grooves 28 in this embodiment are as shown in FIG.
), the heel portion 26 is provided with side walls 28a that are substantially orthogonal to the surface of the heel portion 26 and spaced apart from each other in parallel with each other, and a semicircular bottom portion 28b that is connected to these side walls. Although not limited to, grooves having a triangular cross section, a semicircular cross section, or a side wall oblique to the surface of the heel portion 26, or even a groove formed on the surface of the heel portion 26, are not limited thereto. It includes protrusions, etc., and its shape and depth or height can be changed as appropriate to suit the specifications of the tire and the rim in which it is installed, reducing the contact area with the rim. It is fine as long as it can be done.

それゆえ、リム10にタイヤ12を組み込む場合に、リ
ムの深底部16に連続して起立するそのシート部20と
、タイヤのビード部、特にはそのヒール部分26と接触
する面積を低減させることができるので、リムにタイヤ
組み込み場合に、それらの間に生起される摩擦力を大幅
に低下させることができる。
Therefore, when the tire 12 is assembled into the rim 10, it is possible to reduce the contact area between the seat portion 20, which stands continuously on the deep bottom portion 16 of the rim, and the bead portion of the tire, particularly the heel portion 26. Therefore, when a tire is assembled into a rim, the frictional force generated between them can be significantly reduced.

更に、本実施例にあっては、それら条溝28の延在方向
をタイヤ半径方向に対して所定の角度をなすとともに、
その周方向に一定間隔をなすよう形成した。
Furthermore, in this embodiment, the extending direction of the grooves 28 forms a predetermined angle with respect to the tire radial direction, and
They were formed at regular intervals in the circumferential direction.

このことにより、タイヤ内部12aに内圧を適用する場
合に、ビード部14は、その剛性が低い部分に沿って、
つまり条溝28の延在方向に沿って、タイヤ周方向に移
動しながら漸次リム】0の所定位置に組み込まれること
となる。
As a result, when applying internal pressure to the inside of the tire 12a, the bead portion 14 has a lower rigidity.
In other words, it is gradually assembled into a predetermined position on the rim while moving in the circumferential direction of the tire along the extending direction of the groove 28.

勿論、条溝28の延在方向は、種々変更することができ
、第1図(a)に示したタイヤのそれと異なり、例えば
、第2図に示した他のタイヤのように、実質的に逆向き
に形成したものであっても良い。
Of course, the extending direction of the grooves 28 can be changed in various ways, and is different from that of the tire shown in FIG. 1(a), for example, as in the other tire shown in FIG. It may be formed in the opposite direction.

更に、第3図に示す本発明に係る他の実施例にあっては
、複数の条溝28が、タイヤの赤道面に直交しその回転
軸を含む甲面Mに関して対称となるよう形成されており
、同一方向を指向する条溝28が形成されたビード部1
4の周長を、第1図(a)に示したタイヤのそれの約1
/2としたものである。
Furthermore, in another embodiment according to the present invention shown in FIG. 3, the plurality of grooves 28 are formed so as to be symmetrical with respect to the upper surface M that is perpendicular to the equatorial plane of the tire and includes its rotation axis. The bead portion 1 is formed with grooves 28 oriented in the same direction.
The circumference of 4 is approximately 1 that of the tire shown in Figure 1 (a).
/2.

それゆえ、互いに対称に形成された条溝28を具備する
ヒール部分26の半部は、タイヤへの内圧適用に際し、
同時にリムlOに組み込まれ、その移動距離が、第1図
(a)に示したタイヤのビード部のそれの172となる
ので、リムに組み込むのに要する時間をほぼ半減させる
ことができ、従って組み込みに要する時間をほぼ半減さ
せることができる。
Therefore, the halves of the heel portion 26 with grooves 28 formed symmetrically with respect to each other, when applying internal pressure to the tire,
At the same time, it is incorporated into the rim lO, and its moving distance is 172 times that of the bead of the tire shown in Figure 1(a), so the time required for assembling it into the rim can be almost halved. The time required can be almost halved.

ちなみに、第1図(a)に示す条溝が、ヒール部分26
に形成された本発明に係るタイヤと、ヒール部分にその
ような条溝が形成されていない従来構造のタイヤとを用
いて比較試験を行った結果を以下に示す。
By the way, the groove shown in FIG. 1(a) is the heel part 26.
The results of a comparative test using a tire according to the present invention formed in the following manner and a tire having a conventional structure in which such grooves are not formed in the heel portion are shown below.

◎供試タイヤ サイズが225150 ZRI6の一般的なラジアル構
造タイヤ。
◎The test tire size is 225150 ZRI6, a typical radial structure tire.

◇発明タイヤ 第1図に示す条溝をヒール部分に有するタイヤで、タイ
ヤ半径方向に対する条溝のなす角度45°、条溝の溝幅
0,7閣、条溝の深さ05鵡、周方向間隔5.1閣とし
たもの。
◇Invention Tire A tire having the grooves shown in Figure 1 in the heel part, the angle of the grooves with respect to the tire radial direction is 45°, the groove width is 0.7 degrees, the groove depth is 05 degrees, and the circumferential direction The interval is 5.1.

◇従来タイヤ ヒール部分に条溝を有しないもの。◇Conventional tires Those that do not have grooves on the heel part.

◎試験方法 タイヤをリムに取り付け、タイヤのビード部をリムに組
み込むのに必要なフィツト圧力及びりムに組み込まれた
タイヤのユニフォーミティについてそのラジアルフォー
スバリエーション(RPV)を求めた。
◎Test Method A tire was attached to a rim, and the radial force variation (RPV) was determined regarding the fit pressure required to incorporate the bead of the tire into the rim and the uniformity of the tire incorporated into the rim.

◎試験結果 試験結果を次表に示す。◎Test results The test results are shown in the table below.

表 上記表から明らかなように1、この発明タイヤによれば
、リムへの装着に必要な圧力を約35%低減させるとと
もに、タイヤにリムを確実に一体的に組み込んで、ユニ
フォーミティを向」−させることができる。
As is clear from the table above, 1. According to the tire of the present invention, the pressure required for mounting on the rim can be reduced by approximately 35%, and the rim can be reliably integrated into the tire to improve uniformity. - can be done.

なお、本発明はこれら実施例に限定されるものではなく
、タイヤ半径方向に対する条溝の角度を変更することは
勿論、条溝を湾曲させることもでき、更には、条溝のタ
イヤ周方向における間隔も適宜変更し得るものであって
、特許請求の範囲内で種々の変更を加えることができる
Note that the present invention is not limited to these examples, and it is possible to change the angle of the grooves with respect to the tire radial direction, as well as to curve the grooves, and furthermore, it is possible to change the angle of the grooves in the tire circumferential direction. The interval can also be changed as appropriate, and various changes can be made within the scope of the claims.

【図面の簡単な説明】[Brief explanation of drawings]

第1図(a)は、本発明に係るタイヤを示す模式第1図
(b)は、第1図(a)の線^−Aに沿う断面を示す図
、 第1図(c)は、第1図(a)の線B−8に沿う断面図
、第2図は、本発明タイヤの他の実施例を示す模式図、 第3図は、本発明タイヤの更に他の実施例を示す模式図
、そして 第4図(a)及び(b)は、タイヤが組み込まれるリム
の断面図及び、タイヤのリムへの組み込む様子を示す説
明図である。 10・・・リム      12・・・タイヤ14・・
・ビード部    16・・・深底部18・・・ベース
部    20・・・シート部22・・・フランジ部 
  24・・・突起26・・・ヒール部分   28・
・・条溝特許出願人株式会社ブリデストン 代理人弁理士  杉  村  暁  査問  弁理士 
 杉   村   興   杵築1図 (a) (b)(c) 第2図
FIG. 1(a) is a schematic diagram showing a tire according to the present invention. FIG. 1(b) is a diagram showing a cross section along the line ^-A in FIG. 1(a). FIG. 1 is a cross-sectional view taken along line B-8 in (a), FIG. 2 is a schematic diagram showing another embodiment of the tire of the present invention, and FIG. The schematic diagram and FIGS. 4(a) and 4(b) are a sectional view of a rim in which a tire is installed, and an explanatory view showing how the tire is installed in the rim. 10... Rim 12... Tire 14...
・Bead part 16... Deep bottom part 18... Base part 20... Seat part 22... Flange part
24... Protrusion 26... Heel part 28.
...Jomizo Patent Applicant Brideston Co., Ltd. Representative Patent Attorney Akira Sugimura Examiner Patent Attorney
Oki Sugimura Kitsuki Figure 1 (a) (b) (c) Figure 2

Claims (1)

【特許請求の範囲】[Claims] 1、リムへの装着を担保するタイヤのビード部の少なく
とも一方のヒール部分に、タイヤ半径方向成分を有しそ
の周方向に相互に離間して延在する複数の条溝を形成し
たことを特徴とする装着容易な空気入りタイヤ。
1. A plurality of grooves having a radial component and extending spaced apart from each other in the circumferential direction are formed in the heel portion of at least one of the bead portions of the tire that ensures attachment to the rim. A pneumatic tire that is easy to install.
JP1091725A 1989-04-13 1989-04-13 Pneumatic tire easy to attach Pending JPH02270610A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1091725A JPH02270610A (en) 1989-04-13 1989-04-13 Pneumatic tire easy to attach

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1091725A JPH02270610A (en) 1989-04-13 1989-04-13 Pneumatic tire easy to attach

Publications (1)

Publication Number Publication Date
JPH02270610A true JPH02270610A (en) 1990-11-05

Family

ID=14034480

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1091725A Pending JPH02270610A (en) 1989-04-13 1989-04-13 Pneumatic tire easy to attach

Country Status (1)

Country Link
JP (1) JPH02270610A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05201212A (en) * 1991-08-09 1993-08-10 Sumitomo Rubber Ind Ltd Pneumatic tire
JP2004098714A (en) * 2002-09-04 2004-04-02 Sumitomo Rubber Ind Ltd Pneumatic tire, manufacturing method for pneumatic tire and tire vulcanizing mold
JP2006290240A (en) * 2005-04-13 2006-10-26 Toyo Tire & Rubber Co Ltd Pneumatic tire and tire molding die
KR100839734B1 (en) * 2007-03-30 2008-06-19 금호타이어 주식회사 Tire being provided with projection on surface of bead part
JP2015205608A (en) * 2014-04-22 2015-11-19 住友ゴム工業株式会社 pneumatic tire

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05201212A (en) * 1991-08-09 1993-08-10 Sumitomo Rubber Ind Ltd Pneumatic tire
JP2004098714A (en) * 2002-09-04 2004-04-02 Sumitomo Rubber Ind Ltd Pneumatic tire, manufacturing method for pneumatic tire and tire vulcanizing mold
JP2006290240A (en) * 2005-04-13 2006-10-26 Toyo Tire & Rubber Co Ltd Pneumatic tire and tire molding die
JP4618597B2 (en) * 2005-04-13 2011-01-26 東洋ゴム工業株式会社 Pneumatic tire and tire mold
KR100839734B1 (en) * 2007-03-30 2008-06-19 금호타이어 주식회사 Tire being provided with projection on surface of bead part
JP2015205608A (en) * 2014-04-22 2015-11-19 住友ゴム工業株式会社 pneumatic tire

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