| 摘要 |
<p>The present invention provides an anti-kickback for arresting movement of a rail (22) accommodated within an elongate channel (24), wherein the device comprises: a slide surface (40) located in one of the rail or channel and inclined in relation to an opposing side wall (42) of the other of the rail or channel; a slide member (32) arranged to slide along the slide surface between an extended position and a retracted position further from the side wall than the extended position; and a resilient member (36) which biases the slide member along the slide surface towards the extended position and into abutment with the side wall, wherein movement of the channel in relation to the rail in a longitudinal forward direction causes friction between the slide member and the side wall to push the slide member along the slide surface and towards the retracted position, wherein movement of the channel in relation to the rail in a longitudinal backward direction opposite to the forward direction causes friction between the slide member and the side wall to push the slide member along the slide surface towards the extended position thereby taking up clearance between the rail and the channel to the extent that the rail is wedged stationary against the channel, characterised in that the resilient member is at least partially received within a hollow elongate sleeve (54).</p> |
