| 摘要 |
PURPOSE:To prevent a toothed belt from moving in a zigzag direction by causing the primary twist angle to make a specified angle to the longitudinal direction of a twisted yarn cord so that the primary twist direction is roughly coincided with the longitudinal direction of a tension member and the chasing in the cross direction of the belt is suppressed. CONSTITUTION:A tension member 3 is made up of glass fiber twisted yarn cord, in which three strands are put together and twisted into a string of the primary twist, and then, thirteen strings as above are put together and twisted in the direction opposite to the primary twist direction into the final twist, and further, the final twist direction of the twisted yarn cord is opposite to the direction of inclination with respect to the longitudinal direction of a belt. Moreover, the primary twist angle is 87-93 deg. to the longitudinal direction of the twisted yarn cord, and the final twist coefficient is 3.0-3.8. Therefore, the primary twist direction can be roughly coincided with the longitudinal direction of the tension member 3, and accordingly, the chasing in the cross direction of the belt can be suppressed, and the belt can be prevented from moving in a zigzag direction.
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