Title:
PNEUMATIC TIRE
Document Type and Number:
Japanese Patent JP2018079931
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a pneumatic tire capable of improving durability of a carcass layer in a bead part.SOLUTION: A bead core 5 includes: at least two layers of central layers 10A having six or seven layers in a tire radial direction and located in a central part in the tire radial direction; at least two layers of upper layers 10B located outside the tire radial direction than the central layer 10A; and at least two layers of lower layers 10C located inside the tire radial direction than the central layer 10A. The number of metal wires at a circulating portion in the central layers 10A is the same as each other and a maximum value and is in a range of 6 to 7 wires, and the number of the metallic wires at the circulating portion in the upper layer 10B and the lower layers 10C decreases one by one from the maximum value as becoming far from the central layer 10A. A total fineness of carcass cords constituting an inner carcass layer 4A is in a range of 4000 to 5500 dtex.SELECTED DRAWING: Figure 2
Inventors:
AKASHI YASUTAKA
Application Number:
JP2018005767A
Publication Date:
May 24, 2018
Filing Date:
January 17, 2018
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD
International Classes:
B60C15/04; B60C15/00
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Attorney, Agent or Firm:
Seiryu International Patent Service Corporation
Takayoshi in the daytime
Masao Sakaizawa
Takayoshi in the daytime
Masao Sakaizawa