| 摘要 |
<p>A trolley 100 for mounting on a beam (12 fig. 1) of a gantry (10 fig. 1), comprising: first and second plates 103, 116, a roller assembly 102, 104 mounted at an end of the first plate 103 and a shaft 112 extending outwardly of the first plate 103. The second plate 116 is rotatably mounted on the shaft 112 such that the second plate 116 can move between a closed position, in which the second plate 116 engages with the roller assembly 102, 104 and an open position in which the second plate 116 does not engage with the roller assembly 102, 104. The trolley 100 may comprise a handle 106, a master link and/or a pulley wheel 114. The pulley wheel 114 may rotate on the shaft 112. The trolley 100 may be included on a gantry (10 fig. 1).</p> |
