Abstract

The present invention addresses the problem of providing a bill conveying roller base having an excellent swelling resistance. In order to solve this problem, the bill conveying roller base is provided with an elastic layer for covering at least part of the outer peripheral surface, the elastic layer comprising a thermosetting polyurethane which is obtained by reacting polyol components containing a lactone polyol with polyisocyanate components containing methylene diphenyl diisocyanate (MDI).

IPC Classes  ?

• B65H 5/06 - Feeding articles separated from piles; Feeding articles to machines by rollers

Abstract

In an autotensioner of a type in which a boss of an oscillating member is pivotally fitted on a spindle of a stationary member through a bush including a metal part and a resin layer formed on the inner periphery of the metal part, the clearance in its initially assembled state between the outer periphery of the spindle and the inner periphery of the bush is 60 µm or less to make it difficult to cause fretting between the spindle and the bush even upon input of large short quick vibrations to the autotensioner and thereby extend the service life of the autotensioner. Furthermore, the spindle has a surface hardness of Hv 500 or more to prevent wear of the spindle itself from progressing even upon occurrence of fretting.

IPC Classes  ?

• F16H 7/12 - Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
• F16H 7/08 - Means for varying tension of belts, ropes, or chains