| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a chain driving device including a roller chain and sprockets between which the roller chain is wound, having reduced travelling noises during operation while improving the productivity of the sprockets. <P>SOLUTION: A roller 11 of the roller chain is formed into a symmetrical drum shape by uniformly increasing the outer diameter in a range from the center to both ends. The sprocket 20 has a tooth bottom 21a formed into a sectionally symmetrical mountain shape by uniformly reducing a distance from the axial center in a range from the center to both horizontal faces in a tooth cross direction. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
