JPH11301208A - Seamless tire for bicycle - Google Patents
Seamless tire for bicycleInfo
- Publication number
- JPH11301208A JPH11301208A JP10128335A JP12833598A JPH11301208A JP H11301208 A JPH11301208 A JP H11301208A JP 10128335 A JP10128335 A JP 10128335A JP 12833598 A JP12833598 A JP 12833598A JP H11301208 A JPH11301208 A JP H11301208A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- seamless
- fiber layer
- bicycle
- 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
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
- B60C3/00—Tyres characterised by the transverse section
- B60C3/02—Closed, e.g. toroidal, tyres
-
- 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
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/12—Tyres specially adapted for particular applications for bicycles
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自転車用シームレ
スタイヤに関するものであり、さらに詳しくは自転車の
リムへの装着が容易である自転車用シームレスタイヤに
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seamless tire for a bicycle, and more particularly, to a seamless tire for a bicycle that can be easily mounted on a rim of a bicycle.
【０００２】[0002]
【従来の技術】従来より、一般用自転車用タイヤには、
引掛式、針金式およびチューブラーの種類があるが、特
に競技用自転車には、一般に丸タイヤと称する縫合形チ
ューブラータイヤが使用されている。この縫合形チュー
ブラータイヤは、カーカス部となるすだれ布の両端を縫
い合わせているため、縫合部分が厚くなって段差を形成
し、リムへの座りが悪くなったり、縫合部分の隙間にチ
ューブが食い込んでパンクが多発したり、クッション性
や柔軟性が不足する等の欠点がある。これらの欠点を改
善するために、縫製を必要としないシームレスタイヤが
製造されるようになったが、以下の課題が未だに残され
ている。2. Description of the Related Art Conventionally, general bicycle tires include:
There are a hook type, a wire type, and a tubular type. In particular, a suture type tubular tire generally called a round tire is used for a racing bicycle. In this sewn-type tubular tire, since both ends of a blind cloth serving as a carcass portion are sewn together, a sewn portion is thickened to form a step, making it difficult to sit on the rim, and a tube biting into a gap between the sewn portions. This has drawbacks such as frequent occurrence of punctures and insufficient cushioning and flexibility. In order to improve these drawbacks, seamless tires that do not require sewing have been manufactured, but the following problems still remain.
【０００３】[0003]
【発明が解決しようとする課題】縫合形チューブラータ
イヤは、空気を注入するとトレッドゴムの収縮力が勝っ
て反転し、リムと接合する縫合面側が接地面側に反転す
る傾向がみられるものの、カーカス部は縫製されている
ので、寸法安定性に優れており、また、厚くなった縫合
部分の存在により、リムへの装着時にリムの外周方向の
中心線とタイヤの中心線がずれることがないので、芯が
出し易くタイヤをリムに装着する作業が容易である。In the suturing type tubular tire, when air is injected, the contraction force of the tread rubber prevails and the tread rubber reverses, and the suturing surface to be joined to the rim tends to reverse to the contact surface. Since the carcass part is sewn, it has excellent dimensional stability, and due to the presence of the thickened sewn part, the center line in the outer peripheral direction of the rim does not deviate from the center line of the tire when mounted on the rim. Therefore, the work is easy to mount the tire on the rim because the core is easily put out.
【０００４】一方、シームレスタイヤは、糸をチューブ
の外周にスパイラル状にエンドレス（無端）に巻き付け
ているため、空気を注入すると８の字形や蛇がとぐろを
巻いたようにねじれが生じたり、太さが不均一になった
りして、互いの中心線にずれが生じ易く、芯が出し難く
なる。また、空気の圧力により、タイヤの半径方向に必
要以上の収縮力が発生するので、タイヤをリムに装着す
るときは、タイヤの横振れを防いだり、天振れのない真
円を出すために、互いの中心線が合うように芯を固定す
る作業、さらに、タイヤの太さを均一にするために、タ
イヤを引き伸ばしたり、縮めたりする作業に大変な労力
を費やしているのが現状である。On the other hand, in a seamless tire, a yarn is wound endlessly (endlessly) in a spiral shape around the outer periphery of a tube, so that when air is injected, a figure-eight shape or a snake is twisted as if a snake is coiled, and a thick tire is formed. And the center lines are easily displaced due to unevenness, and the core is difficult to come out. In addition, due to the pressure of air, excessive contraction force is generated in the radial direction of the tire, so when mounting the tire on the rim, to prevent the tire from running sideways, or to get a perfect circle without swaying, At present, a great deal of labor is spent on the work of fixing the cores so that their center lines are aligned, and on the work of stretching and shrinking the tires in order to make the tires uniform in thickness.
【０００５】また、カーカス部とトレッド部との間にブ
レーカー（補強材）を挿入することにおいて、実開昭６
１−６４００３号公報では、繊維コード補強層をタイヤ
外周方向に直角に埋設したもの、特公平３−３９８４１
号公報では、織布製ブレーカーを使用したもの、あるい
は特開昭５９−１５３６０６号公報では、短繊維とゴム
との複合体を使用したものが記載されている。これら
は、いずれも路面からの尖鋭な釘、ガラス等によるタイ
ヤのパンクを防止するための補強材として用いられてい
る。[0005] Inserting a breaker (reinforcing material) between the carcass portion and the tread portion has been proposed in Japanese Laid-Open Utility Model Application
In Japanese Patent Application Publication No. 1-64003, a fiber cord reinforcing layer is buried at right angles to the tire outer peripheral direction.
In Japanese Patent Application Laid-Open Publication No. H05-153606, the use of a woven fabric breaker or in the use of a composite of short fibers and rubber is described. These are all used as reinforcing materials for preventing puncture of the tire due to sharp nails, glass or the like from the road surface.
【０００６】しかしながら、実開昭６１−６４００３号
公報や特開昭５９−１５３６０６号公報のブレーカーを
シームレスタイヤに使用しても、上記のねじれや収縮の
問題点は解消されない。また、特公平３−３９８４１号
公報などのようなブレーカーとして用いられる織物は、
一般的に単位長さ当りの経糸本数および緯糸本数を多く
した高密度な織物、あるいは経糸と緯糸をバイアス（織
目に対して斜めに配置）に形成させた織物であるが、い
ずれの織物であってもねじれによる芯のずれや収縮によ
る太さの不均一さは解消されず、リムへの装着は困難で
ある。However, even if the breaker disclosed in Japanese Utility Model Application Laid-Open No. 61-64003 or Japanese Patent Application Laid-Open No. 59-153606 is used for a seamless tire, the above-mentioned problems of torsion and shrinkage cannot be solved. Further, a woven fabric used as a breaker as disclosed in Japanese Patent Publication No. 3-39841,
Generally, it is a high-density woven fabric in which the number of warps and wefts per unit length is increased, or a woven fabric in which warps and wefts are formed in a biased manner (arranged diagonally with respect to the weave). Even if it does, unevenness of thickness due to misalignment or shrinkage of the core due to twisting is not eliminated, and mounting on the rim is difficult.
【０００７】すなわちシームレスタイヤにおいて、たと
え上記のブレーカーを挿入したところで空気を注入した
際に生じるねじれや収縮のない太さが均一なタイヤは未
だ得られていないのが実情である。本発明はかかる実情
を鑑みてなされたものであり、空気を注入した際にねじ
れや収縮の少ないリムへの装着が容易である自転車用シ
ームレスタイヤを提供することを目的とする。That is, in a seamless tire, even if the breaker is inserted, a tire having a uniform thickness without twisting or shrinkage generated when air is injected has not yet been obtained. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a bicycle seamless tire that can be easily mounted on a rim that is less likely to twist or contract when air is injected.
【０００８】[0008]
【課題を解決するための手段】本発明の自転車用シーム
レスタイヤは、タイヤチューブの外周に糸を一定の角度
に傾斜させて無端に巻いた第一層糸束の上に、反対方向
に同じ角度に傾斜させて無端に巻いた第二層糸束を重ね
合わせたカーカス部と、カーカス部の路面との外周接地
部に配設したトレッド部からなるシームレスタイヤにお
いて、カーカス部とトレッド部との間に、経糸がタイヤ
の外周方向に対して同方向に配列し、全周にわたって形
成させた繊維層が挿入されており、かつ圧力５．０kgf/
cm2 の空気注入時の未固定状態におけるタイヤの変形比
が１．０以上２．５以下であることを特徴とするもので
ある。かかる変形比とすることにより、リムにシームレ
スタイヤを装着する際に、特別な技能や労力を費やすこ
となくリムに装着できることが判り、本発明に至った。SUMMARY OF THE INVENTION A seamless tire for a bicycle according to the present invention is provided on a first layer yarn bundle in which a yarn is inclined at a fixed angle around the outer circumference of a tire tube and wound endlessly at the same angle in the opposite direction. In a seamless tire comprising a carcass portion in which a second layer yarn bundle wound endlessly and wound in an endless manner and a tread portion disposed on an outer peripheral grounding portion of a road surface of the carcass portion, a portion between the carcass portion and the tread portion is provided. The warp yarns are arranged in the same direction with respect to the outer circumferential direction of the tire, a fiber layer formed over the entire circumference is inserted, and the pressure is 5.0 kgf /
The tire is characterized in that a deformation ratio of the tire in an unfixed state at the time of air injection of cm 2 is 1.0 or more and 2.5 or less. By adopting such a deformation ratio, it has been found that, when the seamless tire is mounted on the rim, the tire can be mounted on the rim without spending special skills and labor, and the present invention has been achieved.
【０００９】本発明の自転車用シームレスタイヤは、繊
維層における外周方向の１cm四方当りの緯糸／経糸の構
成本数比が１．０未満であることが好ましい。かかる繊
維層を用いることにより、タイヤに空気を注入した際
に、ねじれや収縮が少なく、太さの均一であるタイヤの
変形比の小さいシームレスタイヤが得られる。In the bicycle seamless tire of the present invention, it is preferable that the ratio of the number of weft / warp yarns per 1 cm square in the outer circumferential direction in the fiber layer is less than 1.0. By using such a fiber layer, when air is injected into the tire, a seamless tire having a small twist ratio and a small thickness and a small deformation ratio of the tire can be obtained.
【００１０】本発明の自転車用シームレスタイヤに使用
される繊維層の幅において、トレッド部の幅に対する幅
占有率が３０％以上６０％以下であることが好ましい。
以下、本発明の内容を具体的に説明する。[0010] In the width of the fiber layer used in the bicycle seamless tire of the present invention, the width occupancy of the tread portion is preferably 30% or more and 60% or less.
Hereinafter, the contents of the present invention will be specifically described.
【００１１】[0011]
【発明の実施の形態】本発明の自転車用シームレスタイ
ヤは、タイヤチューブの外周に糸を一定の角度に傾斜さ
せて無端に巻いた第一層糸束の上に、反対方向に同じ角
度に傾斜させて無端に巻いた第二層糸束を重ね合わせた
カーカス部と、カーカス部の路面との外周接地部に配設
したトレッド部からなるシームレスタイヤにおいて、カ
ーカス部とトレッド部との間に、経糸がタイヤの外周方
向に対して同方向に配列し、全周にわたって形成させた
繊維層が挿入されており、かつ圧力５．０kgf/cm2 の空
気注入時の未固定状態におけるタイヤの変形比が１．０
以上２．５以下である。より好ましいタイヤの変形比
は、１．０以上２．０以下である。ここでいう空気注入
時のタイヤの変形比とは、リム等の固定器具に固定しな
い状態（未固定状態）で、タイヤのバルブから圧力５．
０kgf/cm2 の空気を注入後、このタイヤを平地上に静
置し、平地面からタイヤのねじれや変形部の最大（最
高）頂点までの距離（高さ）を空気注入後のタイヤの外
径（太さ）で除した数値である。例えば、全くねじれや
変形のないタイヤはタイヤの変形比が１．０となり、ね
じれ等の度合いが大きくなるほどタイヤの変形比は大き
くなる。タイヤの変形比が２．５を超えるとタイヤの中
心線のずれが大きくなり、タイヤをリムに装着するのが
著しく困難となる。しかもタイヤとしての見栄えも悪
く、商品価値も劣る。BEST MODE FOR CARRYING OUT THE INVENTION A seamless tire for a bicycle according to the present invention is provided in such a manner that a yarn is slanted at a fixed angle on the outer circumference of a tire tube and is wound on the first layer yarn bundle endlessly at the same angle in the opposite direction. In a seamless tire consisting of a carcass portion in which a second layer yarn bundle wound and wound endlessly is overlapped, and a tread portion arranged on the outer peripheral grounding portion with the road surface of the carcass portion, between the carcass portion and the tread portion, The warp yarns are arranged in the same direction as the outer circumferential direction of the tire, the fiber layer formed over the entire circumference is inserted, and the deformation ratio of the tire in an unfixed state when air is injected at a pressure of 5.0 kgf / cm 2. Is 1.0
Not less than 2.5. A more preferable deformation ratio of the tire is 1.0 or more and 2.0 or less. Here, the deformation ratio of the tire at the time of inflation is the pressure from the valve of the tire when the tire is not fixed to a fixing device such as a rim (unfixed state).
After injecting 0 kgf / cm 2 of air, the tire is allowed to stand on a flat ground, and the distance (height) from the flat ground to the maximum (maximum) peak of the torsion and deformation of the tire is measured outside the inflated tire. It is a numerical value divided by the diameter (thickness). For example, a tire having no twist or deformation has a tire deformation ratio of 1.0, and the larger the degree of twist or the like, the larger the tire deformation ratio. If the deformation ratio of the tire exceeds 2.5, the deviation of the center line of the tire becomes large, and it becomes extremely difficult to mount the tire on the rim. Moreover, the appearance as a tire is poor, and the commercial value is also poor.
【００１２】本発明の自転車用シームレスタイヤは、カ
ーカス部とトレッド部との間に、経糸がタイヤの外周方
向に対して同方向に配列し、全周にわたって形成させた
繊維層を有することが好ましい。図１に本発明の自転車
用シームレスタイヤの斜視図を、図２に繊維層の正面拡
大図の一例を示す。１はカーカス部、２は繊維層、３は
トレッド部、４はタイヤチューブ、５は経糸、６は緯糸
である。ここでいう同方向とは、経糸の一部が捩れた
り、ずれたりしたものも含み、全体的な経糸の配列が、
外周方向に対して傾斜角度で１０度以内のものをいう。
傾斜角度が１０度を超えるとタイヤの外周方向に対する
矯正力が弱まり、タイヤにねじれが生じたり、太さが不
均一になったりするからである。より好ましくは、タイ
ヤの外周方向に対して平行に経糸を配列させることであ
る。[0012] The bicycle seamless tire of the present invention preferably has a fiber layer between the carcass portion and the tread portion, in which the warp yarns are arranged in the same direction with respect to the outer peripheral direction of the tire, and are formed over the entire circumference. . FIG. 1 shows a perspective view of a seamless tire for a bicycle of the present invention, and FIG. 2 shows an example of an enlarged front view of a fiber layer. 1 is a carcass part, 2 is a fiber layer, 3 is a tread part, 4 is a tire tube, 5 is a warp, and 6 is a weft. The same direction here includes a part of the warp that is twisted or displaced, and the overall arrangement of the warp is
It means that the inclination angle is within 10 degrees with respect to the outer peripheral direction.
If the inclination angle exceeds 10 degrees, the correcting force in the outer peripheral direction of the tire is weakened, and the tire is twisted or the thickness becomes uneven. More preferably, the warps are arranged in parallel with the outer circumferential direction of the tire.
【００１３】上記構成を満足する繊維層の組織として
は、平織が最も効果的であり、経糸がタイヤの外周方向
に対して平行になるように形成させることが好ましい。
たとえ平織組織であっても、バイアス状に切断した織物
を用いると傾斜角度が１０度を超えて効果は得られな
い。As the structure of the fiber layer that satisfies the above configuration, plain weave is most effective, and it is preferable that the warp be formed so as to be parallel to the outer circumferential direction of the tire.
Even if the fabric has a plain weave structure, if a fabric cut in a bias shape is used, the effect cannot be obtained because the inclination angle exceeds 10 degrees.
【００１４】また、繊維層における外周方向の１cm四方
当りの緯糸／経糸の構成本数比が１．０未満であること
が好ましい。ここでいう構成本数比とは、繊維層のタイ
ヤの外周方向の１cm当りの緯糸の本数を繊維層のタイヤ
の幅方向の１cm当りの経糸の本数で除した数値である。
この構成本数比が、１．０以上になるとタイヤの幅方向
に力が分散され、タイヤの外周方向に対する矯正力が弱
まり、所定範囲の変形比が得られないからである。It is preferable that the ratio of the number of weft / warp yarns per 1 cm square in the outer circumferential direction in the fiber layer is less than 1.0. The ratio of the number of constituents is a value obtained by dividing the number of wefts per 1 cm in the outer circumferential direction of the tire of the fiber layer by the number of warps per cm in the width direction of the tire of the fiber layer.
This is because, when the number ratio of the components is 1.0 or more, the force is dispersed in the width direction of the tire, the correction force in the tire outer peripheral direction is weakened, and a deformation ratio in a predetermined range cannot be obtained.
【００１５】繊維層における緯糸の構成本数は、２５本
／cm以下が好ましい。より好ましくは、１本／cm以下で
あって、さらに緯糸本数が０本／cmであり、実質的に経
糸のみで構成するのが最も好ましい。本発明における緯
糸は、実質的に繊維層の形態維持の役割を果たすもので
あって、できるだけ少ないほうがよい。緯糸は、経糸と
の交叉点において、糸の重なりによる段差を生じせし
め、特に高速で走行する競技用自転車タイヤでは、この
部分で接地圧の集中が起こり、むしろパンクの原因とな
って弊害となり得るからである。The number of wefts in the fiber layer is preferably 25 yarns / cm or less. More preferably, it is 1 yarn / cm or less, and the number of weft yarns is 0 yarn / cm, and it is most preferable that the warp yarn is substantially composed of only warp yarns. The weft in the present invention substantially plays a role in maintaining the form of the fiber layer, and it is preferable that the weft be as small as possible. At the crossing point between the weft and the warp, a step is generated due to the overlapping of the yarns. In particular, in a racing bicycle tire running at a high speed, the contact pressure is concentrated at this portion, which may cause a puncture, which may be a bad effect. Because.
【００１６】また、実質的に経糸のみで構成される繊維
層は、経糸となる単糸間を接着剤により接合し固定され
る。例えば、並列させた経糸に接着剤を塗布または含浸
して予めリボン状に形成させておく方法、あるいはカー
カス部をタイヤ製作用リムに装着し、経糸を巻きながら
並列させた後、接着剤を塗布してカーカス部に経糸を固
定する方法が挙げられる。使用する接着剤としては、カ
ーカス部および経糸を構成する素材により適宜選択され
るが、自転車用シームレスタイヤに採用されている天然
ゴム系や合成ゴム系ものを使用すればよい。Further, in the fiber layer substantially composed of only warp yarns, single yarns serving as warp yarns are joined and fixed with an adhesive. For example, a method in which an adhesive is applied or impregnated to the parallel warps to form a ribbon in advance, or a carcass part is attached to a tire production rim, and the warps are wound and arranged in parallel, and then the adhesive is applied. Then, the warp is fixed to the carcass part. The adhesive to be used is appropriately selected depending on the material constituting the carcass portion and the warp, and may be a natural rubber or a synthetic rubber used in a seamless tire for a bicycle.
【００１７】繊維層に使用される原糸の番手は、特に限
定されるものではなく、１０番手以上１００番手以下の
原糸が適宜使用される。緯糸は繊維層の形態維持できる
程度のものであればよく、できるだけ細い原糸で十分で
ある。The yarn count of the yarn used in the fiber layer is not particularly limited, and a yarn count of 10 to 100 is suitably used. It is sufficient that the weft is of such a degree that the form of the fiber layer can be maintained, and the finest possible yarn is sufficient.
【００１８】また、繊維層を構成する原糸の素材は、
綿、絹等の天然繊維、ポリノジック、レーヨン等の再生
繊維、あるいはナイロン、ポリエステル、ビニロン、ポ
リプロピレン、アラミド等の合成繊維から適宜選択され
る。そのなかでも高強力で低伸度の繊維が好適であり、
それらの程度については、タイヤ使用時の空気圧の影響
を考慮する必要もあるが、繊維層の長さ方向において、
ＪＩＳ Ｌ １０９６における引張強度は４０kgf/cm以
上で、引張伸度は１０％以内が好ましい。The raw material of the yarn constituting the fiber layer is as follows:
The fibers are appropriately selected from natural fibers such as cotton and silk, regenerated fibers such as polynosic and rayon, and synthetic fibers such as nylon, polyester, vinylon, polypropylene and aramid. Among them, high-strength and low-elongation fibers are preferred,
For those degrees, it is necessary to consider the effect of the air pressure when using the tire, but in the length direction of the fiber layer,
The tensile strength according to JIS L 1096 is preferably 40 kgf / cm or more, and the tensile elongation is preferably within 10%.
【００１９】繊維層の幅において、トレッド部の幅に対
する幅占有率は３０％以上６０％以下であることが好ま
しい。ここでいう幅占有率とは、繊維層の幅をトレッド
部の幅で除して、それを１００倍して得られる数値であ
る。この幅占有率が、３０％未満であるとタイヤの外周
方向に対する矯正力が不足し、タイヤにねじれが生じた
り、太さが不均一になったりして、所定範囲の変形比が
得られない。また、６０％を超えるとねじれ防止の効果
が薄くなるとともに、繊維層とトレッド部の幅方向にお
ける余り幅が少なくなり、繊維層の厚みによってはトレ
ッド部とカーカス部に大きな段差が生まれ、それらの部
分の接合性に悪い影響を与えたり、走行中にトレッド部
の剥がれの原因となる。さらにトレッド部に窪みが生じ
て、タイヤとしての機能を損なう恐れがある。In the width of the fiber layer, the width occupancy of the tread portion is preferably 30% or more and 60% or less. The width occupancy here is a value obtained by dividing the width of the fiber layer by the width of the tread portion and multiplying it by 100. If the width occupation ratio is less than 30%, the correcting force in the outer peripheral direction of the tire is insufficient, and the tire is twisted or the thickness becomes uneven, so that a deformation ratio in a predetermined range cannot be obtained. . On the other hand, if it exceeds 60%, the effect of preventing torsion is reduced, and the excess width in the width direction of the fiber layer and the tread portion is reduced. This may adversely affect the joining properties of the parts and cause the tread to peel off during running. Further, a depression may occur in the tread portion, which may impair the function as a tire.
【００２０】以下、本発明の自転車用シームレスタイヤ
の製造方法について説明する。まず、タイヤチューブの
外周に糸を一定の角度に傾斜させて無端に巻いた第一層
糸束の上に接着剤を塗布する。次いで、この上から第一
層糸束と反対方向に同じ角度に傾斜させて糸を無端に巻
いて第二層糸束として重ね合わせ、さらにその上に接着
剤を塗布してカーカス部を形成する。得られたカーカス
部のバルブ取り付け側にリムテープを貼り付け、その反
対側に繊維層を接着剤で接合し、さらにその上にトレッ
ドゴムを貼り付けることによって、本発明の自転車用シ
ームレスタイヤが得られる。Hereinafter, a method of manufacturing a seamless tire for a bicycle according to the present invention will be described. First, an adhesive is applied onto the first layer yarn bundle which is wound around the outer circumference of the tire tube at a certain angle and wound endlessly. Next, from above, the yarn is wound endlessly at the same angle in the direction opposite to the first layer yarn bundle, overlapped as a second layer yarn bundle, and an adhesive is further applied thereon to form a carcass portion. . By attaching a rim tape to the valve mounting side of the obtained carcass part, bonding the fiber layer to the opposite side with an adhesive, and further applying tread rubber thereon, the seamless tire for a bicycle of the present invention is obtained. .
【００２１】リムテープ、繊維層、およびトレッドをそ
れぞれ貼り付け接合に用いる接着剤については、通常の
自転車用タイヤに使用される天然ゴム系や合成ゴム系の
ものを適宜使用するとよい。The rim tape, the fiber layer, and the tread are each used as an adhesive for bonding and bonding. Natural rubber or synthetic rubber used for ordinary bicycle tires may be appropriately used.
【００２２】[0022]
【実施例】以下、本発明の内容について、実施例を挙げ
て説明するが、本発明がこれらに限定されるものではな
い。EXAMPLES The contents of the present invention will be described below with reference to examples, but the present invention is not limited to these examples.
【００２３】（実施例１）幅２４mmの綿製リムテープを
天然ゴム系接着剤で貼り付けた７０／２×３の綿糸から
なる外径２１mmのシームレスカーカスをタイヤ製作用リ
ムにはめ、貼付作業をし易くするため、圧力２kgf/cm
2 程度の空気を注入する。繊維層として、２０番手ア
ラミド繊維（帝人（株）製）を用いた緯糸２１本／cm、
経糸４１本／cm（緯糸／経糸の構成本数比＝０．５１）
の幅１４mmのテープ状平織物を天然ゴム系接着剤で貼り
付け、次いで、その上に幅２８mm（幅占有率＝５０％）
の天然ゴム系トレッドを天然ゴム系接着剤で貼り付け
て、自転車用シームレスタイヤを得た。(Example 1) A seamless carcass having an outer diameter of 21 mm and made of 70/2 × 3 cotton yarn obtained by attaching a cotton rim tape having a width of 24 mm with a natural rubber-based adhesive was fitted to a tire production rim, and the attaching operation was performed. 2kgf / cm pressure for easy operation
Inject about 2 air. As the fiber layer, 21 wefts / cm using 20-count aramid fiber (manufactured by Teijin Limited),
41 warps / cm (composition ratio of weft / warp = 0.51)
14mm wide tape-like plain woven fabric is affixed with a natural rubber-based adhesive, and then 28 mm wide (width occupancy = 50%)
Was bonded with a natural rubber-based adhesive to obtain a seamless tire for bicycles.
【００２４】得られたシームレスタイヤの変形比は、
１．１であり、ほとんどねじれないものとなった。さら
に自転車用リムに接着剤を塗布し、タイヤを装着したと
ころ、特別な熟練を必要とせず、太さが均一でしかも横
振れや天振れがなく芯の出た真円となるリムに装着し易
いタイヤであった。The deformation ratio of the obtained seamless tire is
1.1, which was hardly twisted. After applying the adhesive to the bicycle rim and mounting the tire, it was mounted on a rim that had a uniform diameter without any special skills, had a uniform thickness, and had no core runout or sway. It was easy tire.
【００２５】（実施例２）幅１５mmの綿製耳付きリムテ
ープをクロロプレン系接着剤で貼り付けた２１中５×３
の絹糸からなる外径１８mmのシームレスカーカスをタイ
ヤ製作用リムにはめ、貼付作業をし易くするため、圧力
２kgf/cm2 程度の空気を注入する。繊維層として、２
０番手アラミド繊維（帝人（株）製）を用いた緯糸１２
本／cm、経糸４１本／cm（緯糸／経糸の構成本数比＝
０．２９）の幅９mmのテープ状平織物をクロロプレン系
接着剤で貼り付け、次いで、その上に幅２０mm（幅占有
率＝４５％）の天然ゴム系トレッドをクロロプレン系接
着剤で貼り付けて、自転車用シームレスタイヤを得た。Example 2 A rim tape with cotton ears having a width of 15 mm was adhered with a chloroprene-based adhesive.
A seamless carcass having an outer diameter of 18 mm made of silk thread is fitted on a rim for producing a tire, and air with a pressure of about 2 kgf / cm 2 is injected to facilitate the attaching work. 2 as a fiber layer
Weft 12 using 0-count aramid fiber (manufactured by Teijin Limited)
Yarn / cm, warp 41 yarn / cm (composition ratio of weft / warp =
0.29) of a 9 mm wide tape-like plain woven fabric is adhered with a chloroprene adhesive, and a natural rubber tread having a width of 20 mm (width occupancy = 45%) is adhered thereon with a chloroprene adhesive. , A seamless tire for bicycles was obtained.
【００２６】このシームレスタイヤの変形比は、１．２
となり、ねじれの少ないものとなった。また自転車用リ
ムにこれを装着したところ、太さが均一で横振れや天振
れのない、しかも絹糸のしなやかさが損なわれないリム
に適正に入れ易いタイヤであった。The deformation ratio of this seamless tire is 1.2
It became less twisted. Also, when the tire was mounted on a bicycle rim, the tire was uniform in thickness, free from lateral run-out and sway, and easily fit into a rim that did not impair the flexibility of the silk thread.
【００２７】（比較例１）繊維層を挿入しない点以外
は、実施例１と同様の方法で自転車用シームレスタイヤ
を得た。Comparative Example 1 A seamless tire for a bicycle was obtained in the same manner as in Example 1 except that no fiber layer was inserted.
【００２８】このシームレスタイヤの変形比を測定した
結果は、２．８であった。このタイヤを自転車用リムに
装着しようとしたところ、タイヤのねじれを直したり、
太さを均一にしている間に自転車用リム接着剤が乾燥し
始め、芯出し作業が困難になるなど相当な技能と労力を
要した。The result of measuring the deformation ratio of this seamless tire was 2.8. When I tried to attach this tire to the bicycle rim, I corrected the twist of the tire,
The bicycle rim adhesive began to dry out while the thickness was being made uniform, which required considerable skill and labor such as difficulty in centering.
【００２９】（比較例２）繊維層として、２０番手の綿
糸を用いた緯糸２５本／cm、経糸２５本／cm（緯糸／経
糸の構成本数比＝１．００）の幅１４mm（幅占有率＝５
０％）のテープ状平織物（三協織物（株）製）を使用し
た以外は、実施例１と同様の方法で自転車用シームレス
タイヤを得た。(Comparative Example 2) As the fiber layer, a width of 14 mm (width occupancy rate) of a weft of 25 yarns / cm and a warp of 25 yarns / cm (composition ratio of weft / warp = 1.00) using 20th cotton yarn = 5
A seamless tire for a bicycle was obtained in the same manner as in Example 1 except that a tape-like plain woven fabric (0%) (manufactured by Sankyo Textile Co., Ltd.) was used.
【００３０】このシームレスタイヤの変形比は、２．６
となり、比較例１より若干よい傾向がみられたものの、
リムへの装着にかなりの労力を費やした。The deformation ratio of this seamless tire is 2.6.
Although slightly better than Comparative Example 1 was observed,
A lot of effort was spent on the rim.
【００３１】（比較例３）繊維層として、比較例２と同
じ２０番手の綿糸を用いた緯糸２５本／cm、経糸２５本
／cmの平織物を交叉角４５度のバイアス状に切断した幅
１４mm（幅占有率＝５０％）のテープ状のものを使用し
た以外は、実施例１と同様の方法で自転車用シームレス
タイヤを得た。(Comparative Example 3) As a fiber layer, a flat fabric of 25 wefts / cm and 25 warps / cm using the same 20th-number cotton yarn as in Comparative Example 2 was cut into a bias shape with a cross angle of 45 °. A seamless tire for a bicycle was obtained in the same manner as in Example 1, except that a 14 mm (width occupancy = 50%) tape-shaped thing was used.
【００３２】このシームレスタイヤの変形比は、２．９
であった。バイアス状の繊維層は、カーカス部に沿い易
くタイヤの変形比の低減を図ることができなかった。こ
のタイヤを自転車用リムに装着したところ、比較例１と
同様に、太さを均一にして横振れや天振れをなくすのに
苦労した。The deformation ratio of this seamless tire is 2.9.
Met. The biased fiber layer could easily follow the carcass part and could not reduce the deformation ratio of the tire. When this tire was mounted on a rim for a bicycle, it was difficult to make the thickness uniform and eliminate the lateral run-out and the top run-out, as in Comparative Example 1.
【００３３】（比較例４）繊維層として、２０番手の綿
糸を用いた緯糸２５本／cm、経糸２５本／cm（緯糸／経
糸の構成本数比＝１．００）の幅２３mm（幅占有率＝８
２％）のテープ状平織物を使用した以外は、実施例１と
同様の方法で自転車用シームレスタイヤを得た。(Comparative Example 4) A width of 23 mm (width occupancy ratio) of a weft of 25 yarns / cm and a warp of 25 yarns / cm (composition ratio of weft / warp = 1.00) using 20th cotton as a fiber layer. = 8
A seamless tire for bicycles was obtained in the same manner as in Example 1 except that the tape-shaped plain fabric (2%) was used.
【００３４】このシームレスタイヤの変形比は、２．８
であってねじれが大きなものとなり、リムへの装着性が
悪かった。また、繊維層の幅がトレッドの幅に近いた
め、繊維層の厚みによるトレッド部とカーカス部の段差
が目立ち見栄えが悪いうえ、トレッド部とカーカス部の
接合面が少ないので、実際にこのタイヤを走行させたと
ころトレッド部に剥がれが生じた。実施例１，２および
比較例１〜４の結果を表１に示す。The deformation ratio of this seamless tire is 2.8.
However, the torsion became large, and the mountability to the rim was poor. In addition, since the width of the fiber layer is close to the width of the tread, the step between the tread portion and the carcass portion due to the thickness of the fiber layer is conspicuous and the appearance is poor, and the joint surface between the tread portion and the carcass portion is small, so this tire is actually used. When running, the tread was peeled off. Table 1 shows the results of Examples 1 and 2 and Comparative Examples 1 to 4.
【００３５】[0035]
【表１】 [Table 1]
【００３６】[0036]
【発明の効果】本発明の自転車用シームレスタイヤにお
いて、カーカス部とトレッド部との間に、経糸がタイヤ
の外周方向に対して同方向に配列し、全周にわたって形
成させた繊維層を挿入し、かつ圧力５．０kgf/cm2 の空
気注入時の未固定状態におけるタイヤの変形比を１．０
以上２．５以下に調整することにより、特別な技能や労
力を必要としない優れたリム装着性を有するタイヤとな
る。そして、繊維層における外周方向の１cm四方当りの
緯糸／経糸の構成本数比を１．０未満に調整することに
より、上記のタイヤの変形比を満たすタイヤが容易に得
られる。In the bicycle seamless tire of the present invention, a fiber layer is formed between the carcass portion and the tread portion, in which the warp yarns are arranged in the same direction with respect to the outer peripheral direction of the tire and formed over the entire circumference. And the deformation ratio of the tire in an unfixed state at the time of air injection at a pressure of 5.0 kgf / cm 2 is 1.0.
By adjusting the value to 2.5 or less, a tire having excellent rim mountability that does not require special skills and labor can be obtained. By adjusting the ratio of the number of wefts / warps per 1 cm square in the outer circumferential direction in the fiber layer to less than 1.0, a tire satisfying the above-described tire deformation ratio can be easily obtained.
【図１】本発明の自転車用シームレスタイヤの斜視図を
示す。FIG. 1 is a perspective view of a seamless tire for a bicycle according to the present invention.
【図２】本発明の自転車用シームレスタイヤに使用され
る繊維層の正面拡大図の一例を示す。FIG. 2 shows an example of an enlarged front view of a fiber layer used in the bicycle seamless tire of the present invention.
１．カーカス部 ２．繊維層 ３．トレッド部 ４．タイヤチューブ ５．経糸 ６．緯糸 1. Carcass part 2. Fiber layer 3. Tread part 4. Tire tube 5. Warp yarn 6. Weft
Claims (3)
に傾斜させて無端に巻いた第一層糸束の上に、反対方向
に同じ角度に傾斜させて無端に巻いた第二層糸束を重ね
合わせたカーカス部と、カーカス部の路面との外周接地
部に配設したトレッド部からなるシームレスタイヤにお
いて、カーカス部とトレッド部との間に、経糸がタイヤ
の外周方向に対して同方向に配列し、全周にわたって形
成させた繊維層が挿入されており、かつ圧力５．０kgf/
cm2 の空気注入時の未固定状態におけるタイヤの変形比
が１．０以上２．５以下であることを特徴とする自転車
用シームレスタイヤ。1. A second layer yarn bundle in which the yarn is wound endlessly at an angle on the outer periphery of the tire tube and wound endlessly, and the second layer yarn bundle is wound in the opposite direction and endlessly wound at the same angle. In a seamless tire consisting of a carcass part where the carcass part is superimposed and a tread part disposed on the outer peripheral grounding part of the carcass part on the road surface, the warp is in the same direction with respect to the outer peripheral direction of the tire between the carcass part and the tread part. And a fiber layer formed over the entire circumference is inserted, and the pressure is 5.0 kgf /
A seamless tire for bicycles, wherein a deformation ratio of the tire in an unfixed state at the time of air injection of cm 2 is 1.0 or more and 2.5 or less.
の緯糸／経糸の構成本数比が１．０未満であることを特
徴とする請求項１記載の自転車用シームレスタイヤ。2. The seamless tire for a bicycle according to claim 1, wherein the ratio of the number of wefts / warps per 1 cm square in the outer circumferential direction in the fiber layer is less than 1.0.
対する幅占有率が３０％以上６０％以下であることを特
徴とする請求項１または２記載の自転車用シームレスタ
イヤ。3. The seamless tire for a bicycle according to claim 1, wherein a width occupation ratio of the width of the fiber layer to the width of the tread portion is 30% or more and 60% or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12833598A JP3718340B2 (en) | 1998-04-21 | 1998-04-21 | Seamless tires for bicycles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12833598A JP3718340B2 (en) | 1998-04-21 | 1998-04-21 | Seamless tires for bicycles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11301208A true JPH11301208A (en) | 1999-11-02 |
| JP3718340B2 JP3718340B2 (en) | 2005-11-24 |
Family
ID=14982257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12833598A Expired - Fee Related JP3718340B2 (en) | 1998-04-21 | 1998-04-21 | Seamless tires for bicycles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3718340B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7163736B2 (en) | 2003-04-17 | 2007-01-16 | The Yokohama Rubber Co., Ltd. | Rubber reinforcing fiber cord, method of manufacturing the same, and radial pneumatic tire for passenger car using the same |
| WO2019098121A1 (en) * | 2017-11-17 | 2019-05-23 | 株式会社クラレ | Reinforcing member for bicycle tire, and bicycle tire |
-
1998
- 1998-04-21 JP JP12833598A patent/JP3718340B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7163736B2 (en) | 2003-04-17 | 2007-01-16 | The Yokohama Rubber Co., Ltd. | Rubber reinforcing fiber cord, method of manufacturing the same, and radial pneumatic tire for passenger car using the same |
| WO2019098121A1 (en) * | 2017-11-17 | 2019-05-23 | 株式会社クラレ | Reinforcing member for bicycle tire, and bicycle tire |
| CN111344162A (en) * | 2017-11-17 | 2020-06-26 | 株式会社可乐丽 | Reinforcing member for bicycle tire and bicycle tire |
| JPWO2019098121A1 (en) * | 2017-11-17 | 2020-12-03 | 株式会社クラレ | Reinforcing members for bicycle tires and bicycle tires |
| CN111344162B (en) * | 2017-11-17 | 2022-09-27 | 株式会社可乐丽 | Reinforcing member for bicycle tire and bicycle tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3718340B2 (en) | 2005-11-24 |
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