RUBBER MEMBER AND METHOD FOR MANUFACTURING RUBBER MEMBER

To increase a junction area of junction surfaces so as to sufficiently secure tensile strength of a junction part 35 and to suppress local stress concentration when an external force is applied, in an annular rubber member 3 used as a tire constituting member.SOLUTION: An annular rubber member 3 has...

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Bibliographic Details
Main Authors KANEMARU YUSUKE, SHIBANO TOSHIHARU
Format Patent
LanguageEnglish
Japanese
Published 02.04.2020
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Summary:To increase a junction area of junction surfaces so as to sufficiently secure tensile strength of a junction part 35 and to suppress local stress concentration when an external force is applied, in an annular rubber member 3 used as a tire constituting member.SOLUTION: An annular rubber member 3 has: a junction part 35 formed by mutually laminating a sticking start end part 31 arranged on one side in a thickness direction and a sticking finish end part 33 arranged on the other side in the thickness direction; and a steady part 32 extending with a constant thickness in a circumferential direction between the sticking start end part 31 and the sticking finish end part 33. The sticking start end part 31 has an inclined surface 315 formed between a sticking start end edge 311 and a first boundary 312, and the first boundary 312 is the boundary between the sticking start end part 31 on the other side in the thickness direction of the rubber member 3 and the steady part 32, and the inclined surface 315 is curved so that an increase amount of the thickness of the sticking start end part 31 per unit length in the circumferential direction with the sticking start end edge 311 as a starting point has an indefinite value.SELECTED DRAWING: Figure 2 【課題】タイヤ構成部材として使用される環状のゴム部材3において、接合部35の引張強度を十分に確保し、外力が加わった際の局所的な応力集中を抑えられるよう、接合面の接合面積を大きくする。【解決手段】環状のゴム部材3は、厚み方向一方側に配置された貼り始め端部31と厚み方向他方側に配置された貼り終わり端部33とを互いに積層してなる接合部35と、貼り始め端部31と貼り終わり端部33との間で周方向に一定の厚みで延びる定常部32とを有し、貼り始め端部31は、貼り始め端縁311と第1の境界312との間に形成された傾斜面315を有し、第1の境界312は、ゴム部材3の厚み方向他方側における貼り始め端部31と定常部32との境界であり、貼り始め端縁311を起点とした周方向における単位長さ当たりの貼り始め端部31の厚みの増加量が不定値をとるように傾斜面315が湾曲している。【選択図】図2
Bibliography:Application Number: JP20180183946