RUBBER MEMBER AND METHOD FOR MANUFACTURING RUBBER MEMBER

• Main Authors: KANEMARU YUSUKE, SHIBANO TOSHIHARU
• Format: Patent
• Language: English; Japanese
• Published: 02.04.2020
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

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