| 摘要 |
<p>The sliding gate (P) or door, which has rollers on its bottom edge that co-operate with a rail (G) fixed to the ground as it moves between two posts (P1, P2), one of which is fitted with a catch (11), has an upper guide rail (1) parallel to the lower rail and shaped to co-operate with at least one vertical roller to keep the gate or door gate vertical as it slides between open and closed positions. The vertical rollers are mounted on the opposite post (P2) to the one with the catch or in a support (6) fixed to the post and are fitted on axles allowing limited vertical movement.</p> |
