| 摘要 |
<p>The sliding door is operated by a an endless drive belt or drive chain (9), passed around a pair of spaced deflection rollers (7,8) positioned above the door upper edge. The door has 2 opening panels (1,2), respectively coupled to opposite runs of the drive belt or drive chain, for movement in opposite directions to one another by the rotation of the drive belt or drive chain. The door drive is provided by an electric motor (12), coupled to one of the deflection rollers via an intermediate gearing (13) and a cog or friction wheel (11), cooperating with a cog or friction wheel attached to the deflection roller.</p> |
