| 摘要 |
PURPOSE:To prevent the occurrence of separation between a core wire and a rubber layer in case of use in oil or the like as well as to aim at improvements in durability, by surrounding the core wire with the rubber layer so as not to be exposed to the outside. CONSTITUTION:A rubber layer 12 is set up at upper and lower positions of each core wire, namely, a position orthogonal with a direction where core wires are superposed on each other, and it is constituted of a first rubber layer 12a holding these core wires in between and a second rubber layer 12b being solidly installed with the said first rubber layer 12a at both sides of this first rubber layer 12a. Therefore, these core wires are in no case exposed to the outside, thus no separation between these core wires and the rubber layer 12 due to oil occurs. |
