摘要 |
PROBLEM TO BE SOLVED: To provide a friction transmission device capable of preventing an excessive pressing force from occurring even when a transmission force from one roller to the other is large while simply forming its structure and facilitating the processing and the shape inspection of a finished product. SOLUTION: This friction transmission device comprises a cam face 51 having an angle relative to a tangent at a contact point between a drive roller 1 and a driven roller 2. When the center of a drive roller 1 under no-load is O<SB>1</SB>, the center of a driven roller 2 is O<SB>2</SB>, an xy coordinate is set with O<SB>1</SB>taken as an origin, a y-axis is passed through O<SB>2</SB>, and a distance between O<SB>1</SB>and O<SB>2</SB>is r<SB>0</SB>, the cam face 51 abuts on the rotating support part of the drive roller 1 to pressingly contact the rollers on each other and is formed in the first quadrant of the coordinate, the shape of its cross section at right angle to the roller shaft is formed in a recessed circular arc shape with a single radius, and the center of the circular arc is set in the third quadrant of the coordinate and on the inside of a circle drawn with a radius r<SB>0</SB>about O<SB>1</SB>. COPYRIGHT: (C)2007,JPO&INPIT
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