JP4700410B2 - Pneumatic tire - Google Patents

Pneumatic tire Download PDF

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JP4700410B2
JP4700410B2 JP2005156021A JP2005156021A JP4700410B2 JP 4700410 B2 JP4700410 B2 JP 4700410B2 JP 2005156021 A JP2005156021 A JP 2005156021A JP 2005156021 A JP2005156021 A JP 2005156021A JP 4700410 B2 JP4700410 B2 JP 4700410B2
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bead
rim
tire
lubricant
capturing member
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JP2006327490A (en
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▲ろ▼ 余
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Sumitomo Rubber Industries Ltd
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Description

本発明は、リム組み時に塗布される潤滑剤に起因する周方向のリム滑りを防止する空気入りタイヤに関する。   The present invention relates to a pneumatic tire that prevents circumferential rim slip caused by a lubricant applied during rim assembly.

空気入りタイヤでは、ユニフォミティーに起因する振動、騒音等を改善するため、リム組み時、タイヤ単体のラジアルフォースバリエーション(RFV)の凸位置と、リム単体のラジアルランアウト(RRO)の凹位置との位相合わせを行ったり、重量アンバランスを打ち消す位置に鉛のバランスウェイトをリムに取付けたりすることなどが行われている。   In pneumatic tires, to improve vibration and noise due to uniformity, when the rim is assembled, the radial position of the radial force variation (RFV) of the tire itself and the concave position of the radial runout (RRO) of the rim alone For example, phasing is performed, and a lead balance weight is attached to the rim at a position where the weight imbalance is canceled.

他方、タイヤのリム組みでは、ビード部とリムとの滑りを良くし、組み付け後の内圧充填によってビード部がリムに対して正しく嵌合できるように、予めリムベース面に石鹸水等の潤滑剤が塗布される。   On the other hand, in the tire rim assembly, a lubricant such as soapy water is applied to the rim base surface in advance so that the bead portion and the rim can be smoothly slipped and the bead portion can be properly fitted to the rim by filling with internal pressure after assembly. Applied.

しかし、リム組み直後においては、この潤滑剤が乾かずにビード部とリムとの間に介在するため、タイヤの周方向へのリム滑りが発生しやすい傾向にある。そしてこのリム滑りが生じた場合には、タイヤとリムとの相対的な位置精度を損ねるため、前述のタイヤとリムとの位相合わせ、バランスウェイトの貼着等による効果(便宜上、ユニフォミティー修正効果という)を阻害し、振動、騒音等を誘起するという問題がある。なお、潤滑剤の塗布をやめた場合には、リム組み性を損ねるとともに、嵌合不良が起きてリムとビード部との間に不均一な隙間が発生し、RFVの悪化を招く恐れがある。   However, immediately after assembling the rim, the lubricant does not dry and is interposed between the bead portion and the rim, so that rim slip in the circumferential direction of the tire tends to occur. When this rim slip occurs, the relative positional accuracy between the tire and the rim is impaired, so the effects of the above-described phase alignment between the tire and the rim, sticking of balance weights, etc. (for convenience, uniformity correction effect) The problem of inducing vibration, noise, and the like. When the application of the lubricant is stopped, the rim assemblability is impaired, and a fitting failure occurs, and a non-uniform gap is generated between the rim and the bead portion, which may cause deterioration of RFV.

なお特許文献1には、ビード部のヒール部分に凹部を設け、ビード部がリムに嵌合する際、塗布された潤滑剤を前記凹部によって拭き取りかつ収容するタイヤが提案されている。しかしこのものは、前記凹部が、ビードベース面からヒール曲部又はビード立上げ面にかけて延在するため、タイヤの気密性を損ねる恐れがあり、しかもビードベース面との接触面積が減じるなどリムとの嵌合性を減じる傾向となる。   Patent Document 1 proposes a tire in which a concave portion is provided in a heel portion of a bead portion, and the applied lubricant is wiped and stored by the concave portion when the bead portion is fitted to a rim. However, in this case, since the concave portion extends from the bead base surface to the heel bent portion or the bead rising surface, there is a risk of impairing the airtightness of the tire, and the contact area with the bead base surface is reduced. It tends to reduce the fitting property.

特開2002−225516号公報JP 2002-225516 A

そこで本発明は、ビードトウ部分かつ前記ビード内側面に、スポンジ材からなる潤滑剤捕獲部材を貼着することを基本として、気密性や嵌合性を損ねることなく、潤滑剤に起因したリム組み直後のリム滑りを効果的に抑制することができ、ユニフォミティーの修正効果の喪失による振動、騒音等の発生を防止しうる空気入りタイヤの提供を目的としている。   Therefore, the present invention is based on the fact that a lubricant capturing member made of a sponge material is attached to the bead toe portion and the inner surface of the bead, and immediately after assembling the rim caused by the lubricant without impairing airtightness and fitting properties. It is an object of the present invention to provide a pneumatic tire that can effectively prevent rim slippage and prevent generation of vibration, noise, and the like due to loss of uniformity correction effect.

前記目的を達成するために、本願請求項1の発明は、トレッド部からサイドウォール部をへてビード部に至るカーカスを具える空気入りタイヤであって、
前記ビード部は、リムのリムベース面に支持されるビードベース面と、タイヤ内腔に面するビード内側面とが交わるトウ端を有するビードトウ部分に、スポンジ材からなりかつ前記ビード内側面に貼着される潤滑剤捕獲部材を具えるとともに、
前記潤滑剤捕獲部材は、前記ビードベース面と面一をなしかつ前記リムベース面に接触する半径方向内端面を有することを特徴とする。
In order to achieve the above object, the invention of claim 1 of the present application is a pneumatic tire having a carcass extending from a tread portion to a sidewall portion to a bead portion,
The bead portion is made of sponge material and adhered to the inner surface of the bead at a bead toe portion having a toe end where the bead base surface supported by the rim base surface of the rim and the inner surface of the bead facing the tire lumen intersect. A lubricant capturing member to be used,
The lubricant capturing member has a radially inner end surface that is flush with the bead base surface and contacts the rim base surface .

又請求項2の発明では、前記潤滑剤捕獲部材は、前記半径方向内端面におけるタイヤ軸方向の厚さT1を、前記トウ端とビード外側面との間のタイヤ軸方向のビード巾W0の0.1倍より大かつ0.5倍より小、
かつ該潤滑剤捕獲部材の半径方向外端の前記トウ端からの半径方向高さHを、前記ビード巾W0の1.0倍より大かつ3.0倍より小、
しかも、前記半径方向高さHの1/2を前記トウ端から半径方向に隔てた1/2高さ位置における前記潤滑剤捕獲部材のタイヤ軸方向の厚さT2を、前記ビード巾W0の0.1倍より大かつ0.5倍より小としたことを特徴としている。
又請求項3の発明では、前記潤滑剤捕獲部材は、比重を0.005〜0.060としたことを特徴としている。
According to a second aspect of the present invention, the lubricant capturing member has a thickness T1 in the tire axial direction at the radially inner end surface and a bead width W0 in the tire axial direction between the toe end and the bead outer surface. Greater than 1 and less than 0.5 times,
And a radial height H from the toe end of the radially outer end of the lubricant capturing member is larger than 1.0 times and smaller than 3.0 times the bead width W0,
In addition, the thickness T2 in the tire axial direction of the lubricant capturing member at the 1/2 height position that is ½ of the radial height H separated from the toe end in the radial direction is set to 0 of the bead width W0. It is characterized by being larger than 1 times and smaller than 0.5 times.
According to a third aspect of the present invention, the lubricant capturing member has a specific gravity of 0.005 to 0.060.

なお本明細書では、特に断りがない限り、タイヤの各部の寸法等は、非リム組状態において、タイヤサイズで規定されるリム巾に合わせてビード部を保持したときに特定される値とする。   In this specification, unless otherwise specified, the dimensions and the like of each part of the tire are values specified when the bead part is held in accordance with the rim width defined by the tire size in a non-rim assembled state. .

本発明は叙上の如く、ビードトウ部分かつ前記ビード内側面に、潤滑剤捕獲部材を貼着している。この潤滑剤捕獲部材は、スポンジ材からなりかつその半径方向内端面がビードベース面と面一をなすとともにリムベース面に接触するため、ビードベース面とリムベース面との間に残る潤滑剤を吸収することができ、ビード部のリム滑りを抑制しうる。
In the present invention, as described above, a lubricant capturing member is attached to the bead toe portion and the inner surface of the bead. This lubricant trapping member is made of a sponge material, and its radially inner end surface is flush with the bead base surface and contacts the rim base surface, and therefore absorbs the lubricant remaining between the bead base surface and the rim base surface. It is possible to suppress the rim slip of the bead portion.

以下、本発明の実施の一形態を、図示例とともに説明する。図1は本発明の空気入りタイヤが乗用車用タイヤである場合を示す断面図、図2はそのビード部を拡大して示す断面図である。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a case where the pneumatic tire of the present invention is a passenger car tire, and FIG. 2 is an enlarged cross-sectional view showing a bead portion thereof.

図1において、空気入りタイヤ1は、トレッド部2からサイドウォール部3をへてビード部4のビードコア5に至るカーカス6と、トレッド部2の内方かつ前記カーカス6の半径方向外側に配されるベルト層7とを具える。   In FIG. 1, a pneumatic tire 1 is disposed on a carcass 6 extending from a tread portion 2 through a sidewall portion 3 to a bead core 5 of a bead portion 4, inside the tread portion 2, and radially outside the carcass 6. Belt layer 7.

前記ベルト層7は、スチールコード等の高強力のベルトコードをタイヤ周方向に対して例えば10〜35゜程度で配列した2枚以上、本例では2枚のベルトプライ7A、7Bから形成される。このベルト層7は、各ベルトコードがプライ間相互で交差することによりベルト剛性を高め、トレッド部2の略全巾をタガ効果を有して強固に補強する。本例では、ベルト層7の半径方向外側には、高速耐久性を高める目的で、例えばナイロン等の有機繊維のバンドコードを周方向に対して5度以下の角度で螺旋巻きしたバンド層9が配される。バンド層9としては、前記ベルト層7のタイヤ軸方向外端部のみを被覆する左右一対のエッジバンドプライ、及びベルト層7の略全巾を覆うフルバンドプライが適宜使用できる。   The belt layer 7 is formed of two or more belt plies 7A and 7B in this example, in which high-strength belt cords such as steel cords are arranged at, for example, about 10 to 35 ° with respect to the tire circumferential direction. . The belt layer 7 increases belt rigidity by crossing the belt cords between the plies, and reinforces substantially the entire width of the tread portion 2 with a tagging effect. In this example, on the radially outer side of the belt layer 7, for the purpose of enhancing high-speed durability, for example, a band layer 9 in which a band cord of an organic fiber such as nylon is spirally wound at an angle of 5 degrees or less with respect to the circumferential direction. Arranged. As the band layer 9, a pair of left and right edge band plies that covers only the outer end in the tire axial direction of the belt layer 7 and a full band ply that covers substantially the entire width of the belt layer 7 can be used as appropriate.

又前記カーカス6は、カーカスコードをタイヤ周方向に対して70〜90°の角度で配列する1枚以上、本例では1枚のカーカスプライ6Aから形成される。カーカスコードとして、ナイロン、ポリエステル、レーヨンなどの有機繊維コードが好適に採用される。又前記カーカスプライ6Aは、前記ビードコア5、5間を跨るプライ本体部6aの両端に、前記ビードコア5の廻りでタイヤ軸方向内側から外側に折り返されるプライ折返し部6bを一連に具えるとともに、このプライ本体部6aとプライ折返し部6bとの間には、前記ビードコア5から半径方向外方に向かって先細状にのびるビード補強用のビードエーペックスゴム8が設けられる。   The carcass 6 is formed of one or more carcass plies 6A in this example, in which carcass cords are arranged at an angle of 70 to 90 ° with respect to the tire circumferential direction. As the carcass cord, an organic fiber cord such as nylon, polyester, or rayon is suitably employed. The carcass ply 6A includes a series of ply turn-up portions 6b that are turned back from the inside in the tire axial direction around the bead core 5 at both ends of the ply main body portion 6a straddling the bead cores 5 and 5. A bead apex rubber 8 for bead reinforcement extending in a radially outward direction from the bead core 5 is provided between the ply body portion 6a and the ply turn-up portion 6b.

次に、前記ビード部4は、図2に拡大して示すように、リムのリムベース面に支持されるビードベース面10と、タイヤ内腔に面するビード内側面11とが交わるトウ端PAを有するビードトウ部分Pを具える。なお前記リムは、タイヤサイズに応じて適応される従来的な市販リムであり、乗用車用タイヤの場合、リムベース面がタイヤ軸方向線に対して5゜の角度で傾く5゜深底リムが好適に採用される。   Next, as shown in an enlarged view in FIG. 2, the bead portion 4 has a toe end PA where the bead base surface 10 supported by the rim base surface of the rim and the bead inner surface 11 facing the tire lumen intersect. It has a bead toe portion P having it. The rim is a conventional commercial rim adapted to the tire size, and in the case of a tire for a passenger car, a 5 ° deep rim in which the rim base surface is inclined at an angle of 5 ° with respect to the tire axial line is preferable. Adopted.

そして本発明では、該ビードトウ部分Pに、前記ビード内側面11に貼着されタイヤ周方向にのびる潤滑剤捕獲部材20を設けている。   In the present invention, the bead toe portion P is provided with a lubricant capturing member 20 that is adhered to the bead inner side surface 11 and extends in the tire circumferential direction.

この潤滑剤捕獲部材20は、前記ビードベース面10と面一に整一する半径方向内端面20sを少なくとも有する例えば断面略三角形状、略矩形形状、略台形形状等のスポンジ材から形成される。なお潤滑剤捕獲部材20は、タイヤ一周に亘って連続的に形成されるのが好ましい。しかし、潤滑剤捕獲部材20の周方向の一端部と他端部との間に隙間があいていてもよく、又潤滑剤捕獲部材20を複数に分割し、その分割片を間隔を有して配することもできる。斯かる場合には、潤滑剤捕獲部材20の周方向長さL(分割片の場合は各分割片の合計長さ)Lを、トウ端PAにおけるタイヤ一周長さL0の50%以上、さらには70%以上、さらには90%以上に設定するのが好ましい。 The lubricant capturing member 20 is formed of a sponge material having, for example, a substantially triangular shape, a substantially rectangular shape, or a substantially trapezoidal shape having at least a radially inner end surface 20s that is flush with the bead base surface 10. The lubricant capturing member 20 is preferably formed continuously over the entire circumference of the tire. However, there may be a gap between one end and the other end in the circumferential direction of the lubricant capturing member 20, or the lubricant capturing member 20 is divided into a plurality of pieces, and the divided pieces are spaced apart. It can also be arranged. In such a case, the circumferential length L of the lubricant capturing member 20 (the total length of each divided piece in the case of divided pieces) L is 50% or more of the tire circumferential length L0 at the toe end PA, and further It is preferable to set it to 70% or more, more preferably 90% or more .

又前記スポンジ材は、海綿状の多孔構造体であり、例えばゴムや合成樹脂を発泡させた連続気泡を有するいわゆるスポンジそのものの他、動物繊維、植物繊維又は合成繊維等を絡み合わせて一体に連結したウエブ状のものを含む。好ましくは、エーテル系ポリウレタンスポンジ、エステル系ポリウレタンスポンジ、ポリエチレンスポンジなどの合成樹脂スポンジ、クロロプレンゴムスポンジ(CRスポンジ)、エチレンプロピレンゴムスポンジ(EDPMスポンジ)、ニトリルゴムスポンジ(NBRスポンジ)などのゴムスポンジを好適に用いることができ、とりわけエーテル系ポリウレタンスポンジを含むポリウレタン系又はポリエチレン系等のスポンジは、軽量性、耐久性などの観点から好ましい。   The sponge material is a sponge-like porous structure. For example, in addition to the so-called sponge itself having open cells in which rubber or synthetic resin is foamed, animal fibers, plant fibers or synthetic fibers are entangled and integrally connected. Including web-like ones. Preferably, a synthetic resin sponge such as an ether polyurethane sponge, an ester polyurethane sponge, or a polyethylene sponge, a rubber sponge such as a chloroprene rubber sponge (CR sponge), an ethylene propylene rubber sponge (EDPM sponge), or a nitrile rubber sponge (NBR sponge). A polyurethane-based or polyethylene-based sponge including an ether-based polyurethane sponge is particularly preferable from the viewpoints of lightness and durability.

このようなスポンジ材は、吸水性に優れ、かつその内端面20sがリムベース面に接触しうるため、リム組み後に残存する前記ビードベース面10とリムベース面との間の潤滑剤を吸い取ることができる。そして、このビードベース面10及びリムベース面の乾燥を早め、リム滑りを抑制しうる。   Such a sponge material is excellent in water absorption and its inner end surface 20s can come into contact with the rim base surface, so that the lubricant between the bead base surface 10 and the rim base surface remaining after assembling the rim can be absorbed. . Then, drying of the bead base surface 10 and the rim base surface can be accelerated, and rim slip can be suppressed.

そのためには、
(1)前記潤滑剤捕獲部材20の半径方向内端面20sにおけるタイヤ軸方向の厚さT1を、ビード巾W0の0.1倍より大かつ0.5倍より小とすること;
(2)前記潤滑剤捕獲部材20の半径方向外端20eの前記トウ端PAからの半径方向高さHを、前記ビード巾W0の1.0倍より大かつ3.0倍より小とすること; 及び
(3)前記半径方向高さHの1/2を前記トウ端PAから半径方向に隔てた1/2高さ位置Jにおける前記潤滑剤捕獲部材20のタイヤ軸方向の厚さT2を、前記ビード巾W0の0.1倍より大かつ0.5倍より小とすることが好ましい。
なお前記ビード巾W0は、前記トウ端PAとビード外側面4Sとの間のタイヤ軸方向距離を意味する。
for that purpose,
(1) The thickness T1 in the tire axial direction on the radially inner end face 20s of the lubricant capturing member 20 is set to be larger than 0.1 times and smaller than 0.5 times the bead width W0;
(2) The radial height H from the toe end PA of the radially outer end 20e of the lubricant capturing member 20 is larger than 1.0 times and smaller than 3.0 times the bead width W0. And (3) a thickness T2 of the lubricant capturing member 20 in the tire axial direction at a half height position J, in which a half of the radial height H is separated from the toe end PA in the radial direction, The bead width W0 is preferably larger than 0.1 times and smaller than 0.5 times.
The bead width W0 means a distance in the tire axial direction between the toe end PA and the bead outer surface 4S.

これは、潤滑剤捕獲部材20の前記厚さT1が過小であると、リムベース面と接触して潤滑剤を吸い取るための前記内端面20sの面積(即ち吸取り面積)が不足し、吸い取り効果が充分発揮されないからである。又潤滑剤捕獲部材20の前記半径方向高さHが過小、及び前記1/2高さ位置Jにおける厚さT2が過小なときには、吸い上げ速度や吸い上げ容量が不足し、同等に吸い取り効果が充分発揮されなくなる。   This is because if the thickness T1 of the lubricant capturing member 20 is too small, the area of the inner end surface 20s for contacting the rim base surface and sucking the lubricant (ie, the sucking area) is insufficient, and the sucking effect is sufficient. It is because it is not demonstrated. Further, when the radial height H of the lubricant capturing member 20 is too small and the thickness T2 at the half height position J is too small, the sucking speed and the sucking capacity are insufficient, and the sucking effect is sufficiently exhibited. It will not be done.

従って前記厚さT1は、前記ビード巾W0の0.1倍より大、好ましくは0.2倍以上、さらに好ましくは0.3倍以上に設定するのが望ましい。又前記半径方向高さHは、前記ビード巾W0の1.0倍より大、好ましくは1.2倍以上、さらには1.5倍以上に設定するのが望ましい。又前記厚さT2は、前記ビード巾W0の0.1倍より大、好ましくは0.2倍以上、さらに好ましくは0.3倍以上に設定するのが望ましい。   Accordingly, the thickness T1 is desirably set to be larger than 0.1 times the bead width W0, preferably 0.2 times or more, more preferably 0.3 times or more. The radial height H is set to be larger than 1.0 times, preferably 1.2 times or more, more preferably 1.5 times or more of the bead width W0. The thickness T2 is preferably set to be larger than 0.1 times the bead width W0, preferably 0.2 times or more, more preferably 0.3 times or more.

なお前記厚さT1が、前記ビード巾W0の0.5倍以上となると、リム組み作業の邪魔となり、しかも作業時や保管時などにスポンジを引っかけて、欠けや損傷を起こしやすくする。又前記半径方向高さHが、ビード巾W0の3.0倍以上、及び前記厚さT2は、ビード巾W0の0.5倍以上では、材料コストの不必要な無駄を招く他、貼付け作業性を損ねるとともに、蓄熱作用によってビード温度の上昇を招く傾向となる。なお前記厚さT1は、厚さT2以上(T1≧T2)であるのが好ましい。   When the thickness T1 is 0.5 times or more of the bead width W0, the rim assembling work is obstructed, and the sponge is easily caught during work or storage, thereby easily causing chipping or damage. If the height H in the radial direction is 3.0 times or more of the bead width W0 and the thickness T2 is 0.5 times or more of the bead width W0, an unnecessary waste of material cost is caused and affixing work is performed. In addition to impairing the properties, the heat storage action tends to increase the bead temperature. The thickness T1 is preferably equal to or greater than the thickness T2 (T1 ≧ T2).

又スポンジ材としては、その比重が0.005〜0.060のものが好ましく、0.060を超えると気孔比率が過小となって吸い取り効果を損ねる。又比重が0.005を下回ると、強度不足となって損傷を起こししやすくなる。このような観点から、比重の下限値は0.010以上、さらには0.016以上であるのがより好ましく、又上限値は0.050以下、さらには0.035以下であるのが好ましい。又このように低比重とすることにより、タイヤ重量バランスへの悪影響も低く抑えうる。   The sponge material preferably has a specific gravity of 0.005 to 0.060, and if it exceeds 0.060, the pore ratio becomes too small and the sucking effect is impaired. On the other hand, if the specific gravity is less than 0.005, the strength becomes insufficient and damage is likely to occur. From such a viewpoint, the lower limit value of the specific gravity is more preferably 0.010 or more, more preferably 0.016 or more, and the upper limit value is preferably 0.050 or less, more preferably 0.035 or less. In addition, by making the specific gravity low in this way, adverse effects on the tire weight balance can be kept low.

又潤滑剤捕獲部材20の貼着としては、例えば、合成ゴムを有機溶剤に溶解した溶液型、及び水に分散させたラテックス型などの合成ゴム系の液状の接着剤、或いは両面粘着テープが好適に採用しうる。特に両面粘着テープは、取扱いが容易でかつ貼着作業効率にも優れるため、好ましく用いうる。   Further, as the adhesion of the lubricant capturing member 20, for example, a synthetic rubber-based liquid adhesive such as a solution type in which a synthetic rubber is dissolved in an organic solvent and a latex type dispersed in water, or a double-sided adhesive tape is suitable. Can be adopted. In particular, the double-sided pressure-sensitive adhesive tape can be preferably used because it is easy to handle and has excellent adhesion work efficiency.

又本発明者の実験の結果、前記潤滑剤捕獲部材20は、ロードノイズの低減効果も有していることが判明した。これは前記スポンジ材が、吸水性以外にも、防振性や吸音性にも優れることに原因し、タイヤ内腔内で生じた共鳴音エネルギーを、前記スポンジ材が緩和、吸収し、タイヤの空洞共鳴を抑制しうるからと推測される。   As a result of experiments by the inventors, it has been found that the lubricant capturing member 20 also has an effect of reducing road noise. This is because the sponge material is excellent in vibration proofing and sound absorption in addition to water absorption, and the sponge material relaxes and absorbs the resonance sound energy generated in the tire lumen, so that the tire It is assumed that cavity resonance can be suppressed.

以上、本発明の特に好ましい実施形態について詳述したが、本発明は図示の実施形態に限定されることなく、種々の態様に変形して実施しうる。   As mentioned above, although especially preferable embodiment of this invention was explained in full detail, this invention is not limited to embodiment of illustration, It can deform | transform and implement in a various aspect.

タイヤサイズ195/65R15の乗用車用タイヤを表1の仕様に基づき試作するとともに、各試供タイヤのリム組み直後における周方向の耐リム滑り性能をテストした。又タイヤの騒音性を実車走行によりテストした。なお潤滑剤捕獲部材には、比重0.016のエーテル系ポリウレタンスポンジ(丸鈴株式会社 製品番号E16)を使用した。   A tire for a passenger car having a tire size of 195 / 65R15 was made on the basis of the specifications shown in Table 1, and the rim sliding resistance performance in the circumferential direction immediately after the rim assembly of each sample tire was tested. In addition, the noise characteristics of the tire were tested by running the vehicle. For the lubricant capturing member, an ether polyurethane sponge (product number E16, Maruzu Co., Ltd.) having a specific gravity of 0.016 was used.

(1)耐リム滑り性能;
・所定のリム(15×6.5JJ)およびタイヤの汚れをナフサで取り除いた後、リムに潤滑剤(30%希釈した市販の石鹸水)を刷毛塗りにより塗布してリム組みし、所定の内圧(200kPa)を充填してリムに嵌合させる。
・所定の経過時間(0.5時間)の後、タイヤの内圧を再調整し、図3に示す荷重負荷装置にセットする。
・リムに回転防止用の棒30をセットし、かつタイヤに一定の縦荷重(4.5kN)を負荷した状態で、移動台31を前後に牽引し、リム滑りが生じたときの牽引力を測定した。なお牽引力は最大4.5kN。
(1) Anti-rim sliding performance;
・ After removing dirt from the specified rim (15 × 6.5JJ) and tire with naphtha, apply a lubricant (commercial soap solution diluted 30%) to the rim by brushing and assemble the rim to the specified internal pressure. (200 kPa) is filled and fitted to the rim.
-After a predetermined elapsed time (0.5 hours), readjust the internal pressure of the tire and set it on the load application device shown in FIG.
-With the anti-rotation rod 30 set on the rim and with a constant longitudinal load (4.5 kN) applied to the tire, the moving base 31 is pulled back and forth to measure the traction force when rim slip occurs. did. The maximum traction force is 4.5kN.

(2)騒音性能;
試供タイヤを、リム(15×6.5JJ)、内圧(200kPa)にて車両(2000cc、FF国産車)の全輪に装着し、ロードノイズ計測路(アスファルト粗面路)を時速60km/hで走行したときの、運転席窓側耳位置における車内音を測定し、240Hz付近の気柱共鳴音のピーク値の音圧レベルを測定した。評価は、潤滑剤捕獲部材を具えない従来タイヤを基準とした低減値で示した。−(マイナス)表示は、ロードノイズの減少を意味する。
(2) Noise performance;
A sample tire was mounted on all wheels of a vehicle (2000cc, FF domestic car) with a rim (15 x 6.5 JJ) and internal pressure (200 kPa), and a road noise measurement path (asphalt rough road) at 60 km / h. The vehicle interior sound at the driver seat window side ear position when traveling was measured, and the sound pressure level of the peak value of the air column resonance sound near 240 Hz was measured. Evaluation was shown by the reduction value on the basis of the conventional tire which does not have a lubricant capture member. -(Minus) display means a reduction in road noise.

Figure 0004700410
Figure 0004700410

本発明の空気入りタイヤの一実施例の断面図である。It is sectional drawing of one Example of the pneumatic tire of this invention. そのビード部を拡大して示す断面図である。It is sectional drawing which expands and shows the bead part. 耐リム滑り性能のテストに使用した荷重負荷装置を説明する正面図及び側面図である。It is the front view and side view explaining the load apparatus used for the test of rim slip resistance.

符号の説明Explanation of symbols

2 トレッド部
3 サイドウォール部
4 ビード部
6 カーカス
11 ビードベース面
12 ビード内側面
20 潤滑剤捕獲部材
20s 潤滑剤捕獲部材の内端面
P ビードトウ部分
PA トウ端
2 Tread portion 3 Side wall portion 4 Bead portion 6 Carcass 11 Bead base surface 12 Bead inner surface 20 Lubricant capturing member 20s Inner end surface P of lubricant capturing member Bead toe portion PA Toe end

Claims (3)

トレッド部からサイドウォール部をへてビード部に至るカーカスを具える空気入りタイヤであって、
前記ビード部は、リムのリムベース面に支持されるビードベース面と、タイヤ内腔に面するビード内側面とが交わるトウ端を有するビードトウ部分に、スポンジ材からなりかつ前記ビード内側面に貼着される潤滑剤捕獲部材を具えるとともに、
前記潤滑剤捕獲部材は、前記ビードベース面と面一をなしかつ前記リムベース面に接触する半径方向内端面を有することを特徴とする空気入りタイヤ。
A pneumatic tire having a carcass from the tread portion to the sidewall portion to the bead portion,
The bead portion is made of sponge material and adhered to the inner surface of the bead at a bead toe portion having a toe end where the bead base surface supported by the rim base surface of the rim and the inner surface of the bead facing the tire lumen intersect. A lubricant capturing member to be used,
The pneumatic tire according to claim 1, wherein the lubricant capturing member has a radially inner end surface that is flush with the bead base surface and contacts the rim base surface.
前記潤滑剤捕獲部材は、前記半径方向内端面におけるタイヤ軸方向の厚さT1を、前記トウ端とビード外側面との間のタイヤ軸方向のビード巾W0の0.1倍より大かつ0.5倍より小、
かつ該潤滑剤捕獲部材の半径方向外端の前記トウ端からの半径方向高さHを、前記ビード巾W0の1.0倍より大かつ3.0倍より小、
しかも、前記半径方向高さHの1/2を前記トウ端から半径方向に隔てた1/2高さ位置における前記潤滑剤捕獲部材のタイヤ軸方向の厚さT2を、前記ビード巾W0の0.1倍より大かつ0.5倍より小としたことを特徴とする請求項1記載の空気入りタイヤ。
The lubricant trapping member has a tire axial thickness T1 at the radially inner end face that is greater than 0.1 times the tire axial bead width W0 between the toe end and the bead outer face, and is 0.1. Less than 5 times,
And a radial height H from the toe end of the radially outer end of the lubricant capturing member is larger than 1.0 times and smaller than 3.0 times the bead width W0,
In addition, the thickness T2 in the tire axial direction of the lubricant capturing member at the 1/2 height position that is ½ of the radial height H separated from the toe end in the radial direction is set to 0 of the bead width W0. The pneumatic tire according to claim 1, wherein the pneumatic tire is larger than 1 time and smaller than 0.5 times.
前記潤滑剤捕獲部材は、比重を0.005〜0.060としたことを特徴とする請求項1又は2記載の空気入りタイヤ。   The pneumatic tire according to claim 1 or 2, wherein the lubricant capturing member has a specific gravity of 0.005 to 0.060.
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS584608A (en) * 1981-06-30 1983-01-11 Sumitomo Rubber Ind Ltd Tire
JPH08132816A (en) * 1994-11-11 1996-05-28 Sumitomo Rubber Ind Ltd Tire assembly
JPH10138717A (en) * 1996-10-30 1998-05-26 Michelin & Cie Tire with bead designed to facilitate removal from rim
JPH10236115A (en) * 1997-02-26 1998-09-08 Yokohama Rubber Co Ltd:The Pneumatic tire
JP2000001110A (en) * 1998-06-17 2000-01-07 Yokohama Rubber Co Ltd:The Pneumatic tire
JP2002144809A (en) * 2000-08-31 2002-05-22 Sumitomo Rubber Ind Ltd Assembly unit of pneumatic tire and rim
JP2004066980A (en) * 2002-08-07 2004-03-04 Bridgestone Corp Pneumatic tire
JP2005081997A (en) * 2003-09-08 2005-03-31 Sumitomo Rubber Ind Ltd Pneumatic tire
JP2006224925A (en) * 2005-02-21 2006-08-31 Yokohama Rubber Co Ltd:The Pneumatic tire

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS584608A (en) * 1981-06-30 1983-01-11 Sumitomo Rubber Ind Ltd Tire
JPH08132816A (en) * 1994-11-11 1996-05-28 Sumitomo Rubber Ind Ltd Tire assembly
JPH10138717A (en) * 1996-10-30 1998-05-26 Michelin & Cie Tire with bead designed to facilitate removal from rim
JPH10236115A (en) * 1997-02-26 1998-09-08 Yokohama Rubber Co Ltd:The Pneumatic tire
JP2000001110A (en) * 1998-06-17 2000-01-07 Yokohama Rubber Co Ltd:The Pneumatic tire
JP2002144809A (en) * 2000-08-31 2002-05-22 Sumitomo Rubber Ind Ltd Assembly unit of pneumatic tire and rim
JP2004066980A (en) * 2002-08-07 2004-03-04 Bridgestone Corp Pneumatic tire
JP2005081997A (en) * 2003-09-08 2005-03-31 Sumitomo Rubber Ind Ltd Pneumatic tire
JP2006224925A (en) * 2005-02-21 2006-08-31 Yokohama Rubber Co Ltd:The Pneumatic tire

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