| 摘要 |
<p>Clamping means for a strap (12) of the kind adapted to be located between a strap storage location and a strap utilisation location, comprises a reaction member (86) pivotally mounted on a base member (60) for angular movement about a reaction member pivot axis (80, 82) a guide member (74) mounted for movement relative to the base member (60), and retention means (96) for retaining the guide member (74) and the reaction member (86) in respective rest positions in which the strap (12) is freely movable between the guide member (74) and reaction member (86) until the tension applied to the strap (12) exceeds a predetermined level. Coupling means (70) interconnects the reaction member (86) and the guide member (74) so that, when the tension in the belt exceeds said predetermined level, movement of the guide member (74) causes corresponding movement of the reaction member (86), thereby wrapping the strap (12) round both the reaction member (86) and the guide member (74) so that one layer of the strap (12) is clamped against the reaction member (86) by another layer of the strap (12). The reaction member (86) is pivotally mounted on the base member (60) by means of a first support link (84) and the guide member (74) is slidably mounted on guide means (66, 70, 72) secured to the base member (60) for movement in a direction having a component perpendicular to the reaction member pivot axis (80, 82).</p> |
