JPS5851602Y2 - Retreaded tires - Google Patents
Retreaded tiresInfo
- Publication number
- JPS5851602Y2 JPS5851602Y2 JP1181980U JP1181980U JPS5851602Y2 JP S5851602 Y2 JPS5851602 Y2 JP S5851602Y2 JP 1181980 U JP1181980 U JP 1181980U JP 1181980 U JP1181980 U JP 1181980U JP S5851602 Y2 JPS5851602 Y2 JP S5851602Y2
- Authority
- JP
- Japan
- Prior art keywords
- tire
- layer
- cushion rubber
- rubber layer
- tread
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Description
【考案の詳細な説明】
本考案は予め加硫されたトレッドを台タイヤにクッショ
ンゴムを介して結合し、タイヤ表面に環状に表われるそ
の結合部を補強層により被覆してなる更生タイヤの改良
に関するものである。[Detailed description of the invention] The present invention is an improvement of a retreaded tire in which a pre-vulcanized tread is bonded to a base tire via cushion rubber, and the bonded portion, which appears in an annular shape on the tire surface, is covered with a reinforcing layer. It is related to.
従来この種のタイヤにおいてはトレッドの両側面にクッ
ションゴム層が環状に露出しているそのクッションゴム
層は比較的軟質のゴムでありタイヤ使用時に接地面から
の作用力によって応力が集中的に生じ易い。Conventionally, in this type of tire, a cushion rubber layer is exposed in an annular shape on both sides of the tread.The cushion rubber layer is a relatively soft rubber, and when the tire is used, stress is concentrated due to the force acting from the ground contact surface. easy.
特にタイヤの両側面に露出している両側端部附近では応
力が集中し易い。In particular, stress tends to concentrate near both end portions exposed on both side surfaces of the tire.
またその更生過程において、台タイヤに未加硫のクッシ
ョンゴム層を介して加硫済みトレッドを接着した後にク
ッションゴム層の加硫が行われる。In the retreading process, the cushion rubber layer is vulcanized after the vulcanized tread is bonded to the base tire via the unvulcanized cushion rubber layer.
その加硫時に薄い袋を被せられ、リム組みの上加硫機に
入れられて加硫される。During vulcanization, the material is covered with a thin bag and placed in a rim-assembled vulcanizer for vulcanization.
その際のスチームによる加熱はクッションゴム層のタイ
ヤ両側面部、すなわち両側端部附近では薄い袋を介して
行われるため、トレッドを介し熱せられる中央部附近に
較べると適正加硫以上に加熱され易く、普通は過加硫に
よる劣化の傾向がある。At that time, the heating by steam is carried out through a thin bag on both side surfaces of the cushion rubber layer of the tire, i.e. near both ends, so it is more likely to be heated beyond proper vulcanization compared to the area near the center which is heated through the tread. Normally, there is a tendency for deterioration due to overvulcanization.
つまり、従来のこの種のタイヤはクッションゴム層の露
出しているタイヤ両側の端面部附近で引裂抵抗が弱めら
れているのである。In other words, in conventional tires of this type, tear resistance is weakened near the end surfaces on both sides of the tire where the cushion rubber layer is exposed.
従って前述した応力の集中と合わせて、クッションゴム
層のタイヤ両側端部で割れが生じ易いものであった。Therefore, in addition to the above-mentioned stress concentration, cracks were likely to occur in the cushion rubber layer at both end portions of the tire.
このことは更生タイヤの耐久性にも影響する。This also affects the durability of retreaded tires.
さらにこの種の更生タイヤは台タイヤとトレッドとの結
合においてタイヤ側面に小さい段が生じ易く、その段に
よって外観が損われる問題もあった。Furthermore, this type of retreaded tire has the problem that small steps are likely to occur on the side surface of the tire when the base tire and tread are connected, and the steps impair the appearance.
この考案は上述した各々の問題を解決しようとするもの
である。This invention attempts to solve each of the problems mentioned above.
以下この考案を図示の実施例に基いて説明する。This invention will be explained below based on the illustrated embodiments.
第1図において、1は台タイヤ、2はトレッド、3はク
ッションゴム層である。In FIG. 1, 1 is a base tire, 2 is a tread, and 3 is a cushion rubber layer.
この構造は従来の更生タイヤと同じである。This structure is the same as a conventional retreaded tire.
この更生タイヤの、上記クッションゴム層3が環状に露
出したタイヤ両側面の台タイヤ1とトレッド2との結合
部を被覆するように、台タイヤ1とトレッド2との双方
に跨って補強層4を接着しである点で従来のものと異っ
ている。In this retreaded tire, a reinforcing layer 4 is applied over both the base tire 1 and the tread 2 so that the cushion rubber layer 3 covers the joint portion between the base tire 1 and the tread 2 on both sides of the tire where the cushion rubber layer 3 is annularly exposed. It is different from the conventional one in that it is glued together.
補強層4は、第2図に示すように、繊維組織層5の片面
又は両面にゴム層6を被着したものである。As shown in FIG. 2, the reinforcing layer 4 is made by covering a fiber tissue layer 5 with a rubber layer 6 on one or both sides.
繊維組織層5は例えば織布が用いられその材質はビニロ
ン、ナイロン、綿等がよく、繊維コード7は第3図に示
すように半径方向×−×に対して、被覆接着前は約65
°未満、望ましくは約45°の角度αで(被覆接着後は
約800未満の角度α)互いに交差している。The fiber tissue layer 5 is made of, for example, a woven fabric, and its material is preferably vinylon, nylon, cotton, etc., and the fiber cord 7 has a diameter of about 65 mm in the radial direction x-x as shown in FIG.
They intersect each other at an angle .alpha. of less than .degree., preferably about 45.degree. (after coating adhesion, an angle .alpha. of less than about 800).
被覆接着前の繊維コードの角度αが約65°を越えると
きは補強層4の貼付は巾が変化しにくいので貼付は作業
の能率が悪い。When the angle α of the fiber cord before the coating is bonded exceeds about 65°, the width of the reinforcing layer 4 is difficult to change, so the efficiency of the bonding process is poor.
ゴム層6は、例えば天然ゴムと合成ゴム、あるいは天然
ゴムとぐずゴムを配合したものが繊維組織層5を表面に
出さないように、また台タイヤ1とトレッド2との結合
部を平滑にする目的で使用されている。The rubber layer 6 is made of, for example, a combination of natural rubber and synthetic rubber, or natural rubber and gum rubber, so that the fibrous tissue layer 5 is not exposed to the surface, and the joint between the base tire 1 and the tread 2 is smoothed. used for a purpose.
この更生タイヤはその製造において、台タイヤ1に未加
硫のクッションゴム層3を介して予め整形加硫されたト
レッド2が接着され、さらに未加硫の補強層4が接着さ
れて、そのクッションゴム層6とが同時に加硫されて完
成する。In manufacturing this retreaded tire, a tread 2 which has been shaped and cured in advance is adhered to a base tire 1 via an unvulcanized cushion rubber layer 3, and an unvulcanized reinforcing layer 4 is further adhered to the cushion rubber layer 3. The rubber layer 6 is simultaneously vulcanized and completed.
その加硫の際にタイヤ両側面部のクッションゴム層3の
両端部は補強層4で被われているので部分的な過加硫が
防止される。During the vulcanization, both ends of the cushion rubber layer 3 on both side surfaces of the tire are covered with the reinforcing layer 4, so that partial over-vulcanization is prevented.
この更生タイヤは、使用時に応力の集中し易いクッショ
ンゴム層3のタイヤ両側位置が引裂きに対する抵抗力の
大きい繊維組織層5で補強されているので、また前述し
たようにクッションゴム層3のその部分の過加硫が防止
されているので、割れを生ぜず耐久性が向上したもので
あるのみならず、繊維組織層5の繊維コード7を半径方
向に対して被覆接着前で約65°未満の角度で互いに交
差させたから、補強層4の貼付作業が著るしく容易とな
る。In this retreaded tire, the positions on both sides of the tire of the cushion rubber layer 3, where stress tends to concentrate during use, are reinforced with the fibrous tissue layer 5, which has a high resistance to tearing. Since over-vulcanization is prevented, not only does it not cause cracking and have improved durability, but also the fiber cords 7 of the fiber texture layer 5 are bent at an angle of less than about 65 degrees with respect to the radial direction before coating and bonding. Since they intersect with each other at an angle, the work of attaching the reinforcing layer 4 becomes significantly easier.
さらに外観においても、トレッド結合部に段が生じたと
しても補強材4によって被われて目立たないものとなる
。Furthermore, in terms of appearance, even if a step occurs at the tread joint, it will be covered by the reinforcing material 4 and will not be noticeable.
なお、実施例にお・ける補強層4の寸法について、帯状
の幅寸法は強度と外観と作業性とを考慮して5〜30朋
程度がよく、その厚さ寸法は強度と外観とを考慮して0
.3〜1.5朋程度がよい。Regarding the dimensions of the reinforcing layer 4 in the examples, the width of the strip should preferably be about 5 to 30 mm, taking into consideration strength, appearance, and workability, and the thickness should be about 5 to 30 mm, taking into consideration strength and appearance. and 0
.. Approximately 3 to 1.5 h is good.
以上のようにこの考案によれば、特に台タイヤとトレッ
ドとの結合部のタイヤ両面部の割れを防止できて耐久性
が改良されしかも補強層の貼付作業性が向上した、更生
タイヤを提供できる。As described above, according to this invention, it is possible to provide a retreaded tire that can prevent cracking on both sides of the tire, especially at the joint between the base tire and the tread, and has improved durability, as well as improved workability for attaching the reinforcing layer. .
第1図はこの考案の実施例のタイヤ断面概略図、第2図
は補強層の拡大図、第3図は繊維組織層のコードの交差
関係を示す説明図である。
1・・・台タイヤ、2・・・トレッド、3・・・クッシ
ョンゴム層、4・・・補強層、5・・・繊維組織層、6
・・・ゴム層、7・・・繊維コード。FIG. 1 is a schematic cross-sectional view of a tire according to an embodiment of the present invention, FIG. 2 is an enlarged view of a reinforcing layer, and FIG. 3 is an explanatory diagram showing the intersecting relationship of cords in a fibrous tissue layer. DESCRIPTION OF SYMBOLS 1... Tire, 2... Tread, 3... Cushion rubber layer, 4... Reinforcement layer, 5... Fibrous tissue layer, 6
...Rubber layer, 7...Fiber cord.
Claims (1)
に結合し、タイヤ表面に環状に表われるその結合部を補
強層により被覆してなる更生タイヤにおいて、上記補強
層を構成する繊維コードが半径方向に対して約80°未
満の角度で互いに交差していることを特徴とする更生タ
イヤ。In a retreaded tire in which a vulcanized tread is bonded to a base tire via a cushion rubber layer, and the bonded portion, which appears annularly on the tire surface, is covered with a reinforcing layer, the fiber cords constituting the reinforcing layer extend in the radial direction. A retreaded tire characterized by intersecting each other at an angle of less than about 80° with respect to the tire.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1181980U JPS5851602Y2 (en) | 1980-01-31 | 1980-01-31 | Retreaded tires |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1181980U JPS5851602Y2 (en) | 1980-01-31 | 1980-01-31 | Retreaded tires |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56113005U JPS56113005U (en) | 1981-09-01 |
JPS5851602Y2 true JPS5851602Y2 (en) | 1983-11-24 |
Family
ID=29608425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1181980U Expired JPS5851602Y2 (en) | 1980-01-31 | 1980-01-31 | Retreaded tires |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5851602Y2 (en) |
-
1980
- 1980-01-31 JP JP1181980U patent/JPS5851602Y2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS56113005U (en) | 1981-09-01 |
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