PROBLEM TO BE SOLVED: To control cord intervals not to become uneven in a wind-up part of a carcass ply.SOLUTION: A carcass ply member 6 for a pneumatic tire is provided with a carcass cord 61 comprising three cords 61A, 61B, 61C laterally going back and forth by turning at both ends 60A, 60B, while extending in a longitudinal direction A. The code is disposed having tapered shapes 65 with turning parts 63 as bottom sides 65A, and with each cord interval reduced as approaching each of the laterally opposite end parts 60A, 60B away from each of the bottom sides. The carcass ply member 6 is used for the pneumatic tire with a carcass ply 4 wound up from outside toward inside around the bead core 31 in a tire width direction.SELECTED DRAWING: Figure 3
【課題】カーカスプライの巻き上げ部においてコード間隔が不均等になるのを抑制する。【解決手段】空気入りタイヤ用カーカスプライ部材6において、カーカスコード61を、その横方向両端部60A,60Bで折り返して往復しつつ縦方向Aに延びる3本のコード61A,61B,61Cを構成し、折り返し部63を底辺65Aとして、当該底辺から反対側の横方向端部60A,60Bにかけてコード間隔が減少するテーパ形状65に、コードを配設する。このカーカスプライ部材6を、カーカスプライ4がビードコア31の周りをタイヤ幅方向外側から内側へ巻き上げられてなる空気入りタイヤに用いる。【選択図】図3
PNEUMATIC TIRE AND CARCASS PLY MEMBER THEREOF
空気入りタイヤ及びそのカーカスプライ部材
2017-06-08
Patent
Electronic Resource
Japanese