| 摘要 |
<p>The invention relates to a chain tensioning device for tensioning chain. The chain tensioning device comprises: a rotatable member adapted to be engagable with the chain so that, when engaged thereto, rotation of the member advances the chain in a direction to induce tension, wherein said rotatable member is coupled to a toothed ratchet wheel; an actuator means; a first pawl associated with the actuator means and biased into contact with said ratchet wheel such that, upon actuation, the actuator means rotates the ratchet wheel in a first direction which causes a corresponding rotation of the rotatable member and a resulting tension in the chain; and a second pawl which engages with the ratchet wheel to prevent rotation of the ratchet wheel in a second direction counter to said first direction and serves to inhibit the release of tension in the chain.</p> |
