| 摘要 |
PCT No. PCT/JP93/01201 Sec. 371 Date Apr. 20, 1994 Sec. 102(e) Date Apr. 20, 1994 PCT Filed Aug. 26, 1993 PCT Pub. No. WO94/05932 PCT Pub. Date Mar. 17, 1994.The object of this invention is to reduce the cost of an autotensioner for keeping constant the tension of a belt. A pulley 13 is mounted on the pulley support 6 eccentrically supported by the support shaft 3. A tension imparting member is provided which rocks the pulley support in a direction in which the pulley stretches a belt. The pulley support 6 has a cylindrical portion 8a which is concentrical with the support shaft. Damper 20 is provided between the cylindrical portion 8a and the support shaft 3 to impart a rocking resistance to the pulley support. The pulley support 6 has an eccentric ring 7 and a rocking shaft 8. The rocking shaft has at one end the cylindrical portion 8a and at the other end a cylindrical small-diameter portion 8b which is inserted in the eccentric ring. The pulley support 6 is comprised of two members which are simple in shape and easy to manufacture.
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