| 摘要 |
PURPOSE: A telescopic door apparatus for the entrance of a building is provided to facilitate a maintenance work by bending a horizontal door part vertically to a vertical door part. CONSTITUTION: A telescopic door apparatus for the entrance of a building comprises guiderails(6), multiple door frames(14), a lifting wire, and a lower truss. The guiderails are attached to both side surface of the entrance of a building, and both ends of the door frames are coupled thereto. The door frames have coupling grooves guided along the guiderails. The lifting wire is connected to an upper truss arranged on the uppermost end of the door frames, and one end is wound around a wire drum. The lower truss is connected to the lifting wire and is installed on the lowermost end of the door frames. When the lower truss is lifted, the door frames are successively folded. |
