V-ribbed belt and method for fabricating the same

A method for fabricating a V-ribbed belt in which a cord is embedded generally in a helical arrangement to form a row along the belt width and a plurality of ribs of approximately trapezoidal section are formed on each of bottom and back faces of the belt and in corresponding positional relation between the bottom and back faces to extend in parallel with each other along the belt length, the method comprising the steps of grinding a bottom face of a flat belt including a cord embedded therein generally in a helical arrangement to form a row along the belt width until a thickness d1 of the belt after ground satisfies the following formula:

• d1=hr+δc+C/2+H/2+(L1−L2)/(2π)
• where hr is a set height of the rib, δc is a set thickness from an end of the cord adjacent to the rib to a bottom of the rib, C is the diameter of the cord, H is a set thickness of the V-ribbed belt, L1 is a bottom-face-side inner length of the belt when the bottom face of the belt is faced on an inner peripheral side thereof, and L2 is a back-face-side inner length of the belt when the back face of the belt is faced on the inner peripheral side thereof, and
• grinding a back face of the ground flat belt until a thickness d2 of the belt after ground satisfies the following formula:
• d2=(hr+δc+C/2)×2.