| 摘要 |
The invention relates to a mechanism that secures a screw (1d) of a tension roller (15) during transport or to prevent it from coming loose. Said mechanism comprises a sleeve (6d) consisting of an elastic material that is fixed onto the shank (2) of the screw (1d). When fitted, the sleeve (6d) is elastically deformed and is supported against a central bore (19) of the spacer element (17), thus ensuring that the entire assembly consisting of the tension roller (15), centring disc (18), spacer (17) and screw (1d) is held together. |
