JPS6094807A

JPS6094807A - Pneumatic tire

Info

Publication number: JPS6094807A
Application number: JP58203137A
Authority: JP
Inventors: Nobuhiro Sowa; 曽和　伸丕; Ritsuo Nakayasu; 中安　律夫
Original assignee: Sumitomo Rubber Industries Ltd
Current assignee: Sumitomo Rubber Industries Ltd
Priority date: 1983-10-28
Filing date: 1983-10-28
Publication date: 1985-05-28

Abstract

PURPOSE:To restrict movement of warp and uniformalize end distribution and further improve durability by using knitted cloth, knitted with knitting yarn instead of weaving warp and woof with predetermined intersecting angles, for the reinforcing layer of a bead part. CONSTITUTION:With respect to warp 2 which is organic fiber filament such as nylon or the like and fiber group of 5-50 denier, woof 3 of the same quality is arranged so as to intersect, instead of weaving, said warp 2 with density of arrangement with 80-140% of the warp 2 and at an angle of 60-90 deg.. Then, knitted cloth 1 is made with knitting yarn 4 of fine fiber, and, after its undergoing adhesion processing and heat treatment, a ply is made by burying cords in the rubber through topping rubber treatment. The ply is cut at an angle of 20-70 deg. with respect to the warp 2 and made into a strip to be pasted on a bead part. Thus, movement of the warp is restricted, end distribution is uniformalized and further duration is improved.

Description

【発明の詳細な説明】本発明はビード部補強層として編布を用いた空気入りタ
イヤに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pneumatic tire using a knitted fabric as a bead reinforcing layer.

一般に空気タイヤのビード部補強層は、主として補強要
素となるタイヤコードを経糸として配列するとともに該
経糸の間隔を保持するため経糸より細い緯糸を粗に平織
とした織物が採用されていこの平織物は経糸を交互に開
口し緯糸を杼によって打ちこみ蔵打ちして経糸の上下を
逆に開口し再び緯糸を打ちこむことによって製織する。Generally, the bead reinforcement layer of pneumatic tires is made of a fabric in which tire cords, which serve as reinforcing elements, are arranged as warp threads, and the weft threads, which are thinner than the warp threads, are loosely woven in a plain weave in order to maintain the spacing between the warp threads. Weaving is done by opening the warp threads alternately, driving the weft threads in with a shuttle, and then beating the warp threads upside down, opening the warp threads upside down, and driving the weft threads in again.

そして製織された平織物はデツプ処理、トッピング処理
を施すことにより、プライを製造するが、これらの工程
中に織物組織が乱れやすい（いわゆる目ずれ）という問
題点がある。したがって、織物組織の密度は一定以上粗
とすることができなくなる。The woven plain woven fabric is then subjected to a dip treatment and a topping treatment to produce plies, but there is a problem in that the fabric structure is easily disturbed during these steps (so-called misalignment). Therefore, the density of the textile structure cannot be made coarser than a certain level.

本発明でビード部補強層はカーカスプライの折り返し部
に隣接して配置され、ビード部を強化するとともに、前
記折り返し部の応力集中を緩和する機能を有し、乗用車
用タイヤ、重車両用タイヤ、ライトトラック用タイヤ、
自動二輪車用タイヤ等において使用される。In the present invention, the bead portion reinforcing layer is disposed adjacent to the folded portion of the carcass ply, and has the function of reinforcing the bead portion and alleviating stress concentration in the folded portion. light truck tires,
Used in motorcycle tires, etc.

織物の目ずれを防止する方法として２〜３本の経糸を用
いて緯糸を上下からはさんで織る、いわゆるからみ織が
あるが、織工程が複雑でコストが高く、生産性も劣る欠
点がある。そこで本発明は後述の編布をビード部補強層
に用いることにより、デツピング等の処理工程における
経糸の動きが抑制されて、エンド分布の均一性が保持さ
れ、しかもタイヤの耐久性が向上することが判明したこ
とに基づくものである。As a method to prevent fabrics from shifting, there is so-called karami-ori, which uses two or three warp threads to weave the weft threads from above and below, but this method has the drawbacks of a complicated weaving process, high cost, and low productivity. . Therefore, the present invention uses a knitted fabric, which will be described later, as a bead reinforcing layer, thereby suppressing the movement of warp yarns during processing steps such as depping, maintaining uniform end distribution, and improving tire durability. This is based on the fact that

本発明は経糸を相互に平行に配置するとともに該経糸に
６０°〜９０°の角度で交叉するように緯糸を織ること
なく、配置し、これらの経糸と緯糸を細いフィラメント
糸の絹糸で編成した編布よりなるプライをビード部補強
層に用いた空気入りタイヤである。In the present invention, the warp threads are arranged parallel to each other and the weft threads are arranged so as to intersect the warp threads at an angle of 60° to 90° without weaving, and these warp threads and weft threads are knitted with silk threads of thin filament yarns. This is a pneumatic tire that uses knitted fabric ply as the bead reinforcement layer.

以下本発明の一実施例を図面にしたがって詳細に説明す
る。第１図は本発明の空気入りタイヤの補強層に用いら
れる絹布の表側概略図、第２図は裏側概略図を示す。図
において編布（１）は経糸（２）を相互に平行に配置し
、該経糸にほぼ直角に交叉する経糸と同じ太さの緯糸（
３）を経糸と同じ密度で配置する。これらの経糸と緯糸
を、経糸の長手方向に沿って、細繊維の綿糸（４）で編
成することにより経糸と緯糸を一体化し絹布を形成する
。ここで編成する方法は従来から広く採用されているた
てメリヤス編、あるいはよこメリヤス編等の方法が採用
できる。An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a schematic diagram of the front side of the silk cloth used for the reinforcing layer of the pneumatic tire of the present invention, and FIG. 2 shows a schematic diagram of the back side. In the figure, the knitted fabric (1) has warp threads (2) arranged parallel to each other, and weft threads (
3) are arranged at the same density as the warp threads. These warp and weft threads are knitted with fine fiber cotton threads (4) along the longitudinal direction of the warp threads, thereby integrating the warp threads and weft threads to form a silk cloth. The knitting method here can be a conventionally widely used method such as warp stockinette knitting or horizontal stockinette knitting.

前記経糸に用いられる材料としてナイロン、ポリエステ
ノペレーヨン、芳香族ポリアミド等の有機繊維、スチー
ル、ガラスファイバー等の無機繊維等各種材料が使用で
きる。Various materials can be used for the warp threads, including organic fibers such as nylon, polyester pereyon, and aromatic polyamide, and inorganic fibers such as steel and glass fibers.

また前記緯糸は好ましくは経糸と同じ材質で同じ太さの
糸が使用されるが、接着処理時の張力やその他のタイヤ
製造工程中のゴム引き工程までの張力によって切断しな
い充分の強度を有していればよく、例えば接着処理後の
強力が１００ｇ以上である。尚緯糸は経糸より動きを抑
制する材料を特に選定する必要はない。更に平織では経
糸が滑るためあまり用いられていない長繊維でも本発明
では採用できる。また緯糸は経糸の太さの８０〜１４０
％の範囲のものが使用できる。In addition, the weft is preferably made of the same material and has the same thickness as the warp, but has sufficient strength to prevent it from being cut by the tension during the adhesion process or the tension during the rubberizing process during other tire manufacturing processes. For example, the strength after adhesion treatment is 100 g or more. It is not necessary to specifically select a material for the weft yarns that suppresses movement more than the warp yarns. Furthermore, long fibers, which are not often used in plain weave because the warp threads slip, can also be used in the present invention. Also, the weft is 80 to 140 thicker than the warp.
% range can be used.

次に本発明で用いられる絹糸はタイヤ製造工程における
一般的な接着処理、熱処理条件に充分耐え、しかも処理
後においてゴムと接着しうる材質であれば良く、例えば
ナイロン−６、ナイロン−６６、ポリエステル等の有機
繊維のフィラメントで、５〜５０デニールの繊維径のも
のが使用される。ここでフィラメント径が５デニールよ
り小さいと経糸と緯糸の固定強度が充分ではない。一方
フィラメント径が５０デニールを越えると編物の厚さが
増加し、その結果プライゲージが増加し軽量化の観点か
ら不利である。なお緯糸の配列密度は経糸の配列密度と
実質的に同じとすることが望ましく、通常８０−１４０
％の範囲で選定される。Next, the silk thread used in the present invention may be made of any material that can sufficiently withstand general adhesive treatment and heat treatment conditions in the tire manufacturing process and can adhere to rubber after treatment, such as nylon-6, nylon-66, polyester. Filaments of organic fibers such as those having a fiber diameter of 5 to 50 deniers are used. If the filament diameter is smaller than 5 deniers, the fixing strength between the warp and weft is not sufficient. On the other hand, when the filament diameter exceeds 50 deniers, the thickness of the knitted fabric increases, and as a result, the ply gauge increases, which is disadvantageous from the viewpoint of weight reduction. The arrangement density of the weft yarns is preferably substantially the same as that of the warp yarns, and is usually 80-140.
Selected within a range of %.

上述の如くして得られた絹布は従来から一般に採用され
−Ｃいる接着処理、熱処理の後トッピングゴム処理を施
してゴム中にコードを埋設してプライを作成する。次に
このプライを経糸に対して２０°〜７０°の角度で裁断
して、ストリップを製造し、通常の成型ドラム上で円筒
状タイヤを組立てる際に、ビード部に貼設する。ここで
補強層の経糸は前述のプライの裁断角度に対応して、タ
イヤ赤道面に対して所定の角度で配列されるとともに、
この経糸と直角、もしくは６０°〜９０゜に配列されて
いる緯糸はバイアス構成することとなる。ここで緯糸は
経糸と実質的に同じ太さと埋設密度で構成されているた
め、経糸と同様に補強要素として機能する。The silk fabric obtained as described above is subjected to a conventional adhesive treatment and heat treatment, followed by a topping rubber treatment, and a cord is embedded in the rubber to form a ply. This ply is then cut at an angle of 20° to 70° with respect to the warp to produce strips, which are applied to the bead portion during the assembly of cylindrical tires on conventional building drums. Here, the warp threads of the reinforcing layer are arranged at a predetermined angle with respect to the tire equatorial plane, corresponding to the cutting angle of the ply described above, and
The weft yarns arranged at right angles to the warp yarns or at 60° to 90° form a bias configuration. Here, the weft yarns have substantially the same thickness and embedding density as the warp yarns, and thus function as reinforcing elements in the same way as the warp yarns.

このようにして形成された空気入りタイヤの断面図を第
３図に示す。図においてカーカス（１１）ハヒートコア
（１０）のまわりを折り返してその両端が係止されてふ
り、その折り返し部（１０ａ）の外側で、ビードコア（
１ｏ〉近傍がら前記折り返し部（１１ａ）に隣接して補
強層（１２）が配置されている。な右本発明では補強層
に２枚以上のプライを用いることができることは勿論で
ある。A cross-sectional view of the pneumatic tire thus formed is shown in FIG. In the figure, the carcass (11) is folded back around the heat core (10) so that its both ends are locked, and the bead core (
1o> A reinforcing layer (12) is arranged adjacent to the folded portion (11a). Of course, in the present invention, two or more plies can be used for the reinforcing layer.

しかして本発明の空気入りタイヤは従来の平織物を用い
たタイヤに較べて以下の利点を有する。The pneumatic tire of the present invention has the following advantages over tires using conventional plain weave fabrics.

（イ）補強材の経糸と緯糸が固定されているため、エン
ド分布が均一となりタイヤの均一性が向上し耐久性が改
善される。(b) Since the warp and weft of the reinforcing material are fixed, the end distribution is uniform, improving the uniformity of the tire and improving its durability.

（ロ）本発明の絹布は製織しないため生産性が向上する
とともに経糸の織り縮みがなくなるため材料費のコスト
低減が可能となる。(b) Since the silk fabric of the present invention is not woven, productivity is improved, and since there is no warp weaving shrinkage, material costs can be reduced.

尚本発明は第４図、第５図に編物の表側概略図、裏側概
略図をそれぞれ示す如く、編物（５）を２本の編糸（５
）（６）で構成することにより、経糸と緯糸の目ずれが
一層効果的に防止できる。In addition, in the present invention, the knitted fabric (5) is made of two knitting yarns (5), as shown in FIGS.
) (6), it is possible to more effectively prevent misalignment between warp and weft threads.

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

第１図、第２図、第４図、第５図は編布の概略図、第３
図は本発明のタイヤの断面図である。１．５　絹　布、４．６．７　編　糸２　経　糸　ｌＯ−ビードコア３　緯　糸　１１　カーカス１２　補強層特許出願人　住友ゴム工業株式会社代理人　弁理士　仲　村　義　平第　１　図第２図族１図Figures 1, 2, 4, and 5 are schematic diagrams of knitted fabrics;
The figure is a sectional view of the tire of the present invention. 1.5 Silk Cloth, 4.6.7 Knitting Yarn 2 Warp 1O-Bead Core 3 Weft 11 Carcass 12 Reinforcement Layer Patent Applicant Sumitomo Rubber Industries Co., Ltd. Agent Patent Attorney Yoshihira Nakamura No. 1 Figure 2 Group Figure 1

Claims

【特許請求の範囲】[Claims]

（１）経糸を相互に平行に配置するとともに該経糸に６
０°〜９０°の角度で交叉するように緯糸を織ることな
く配置し、これらの経糸と緯糸を細繊維の編糸で編成し
た編布よりなるブライをビード部補強層に用いた空気入
りタイヤ。(1) The warp threads are arranged parallel to each other, and the warp threads have 6
A pneumatic tire in which the weft yarns are arranged without weaving so as to intersect at an angle of 0° to 90°, and the warp yarns and weft yarns are knitted with fine fiber knitted yarns, and a braai fabric is used as the bead reinforcement layer. .

（２）編糸はナイロン−６、ポリエステル、ナイロン６
６等の有機繊維フィラメントで５〜５０デニールである
特許請求の範囲第１項記載のタイヤ。(2) Knitting yarn is nylon-6, polyester, nylon-6
2. The tire according to claim 1, wherein the tire is made of organic fiber filaments such as No. 6 and has a denier of 5 to 50.