| 摘要 |
A multistage folding door structure is provided to open and close a door structure in multistage automatically by using a door operating bar which is folded or unfolded in three stages, and to improve strength and visibility by making a door main body, a first door operating bar and a second door operating bar to have almost the same width and height when drawing out completely horizontally. A multistage folding door structure(1) comprises a door main body(10) formed in the C-shape and provided with at least one first guide rail groove, a first door operating plate(20) provided with at least one first guide projection to be guided along the first guide rail groove and at least one second guide rail groove, and formed in the inverse C-shape to be opposite to the C-shaped door main body, a second door operating plate(30) provided with at least one second guide projection to be guided along the second guide rail groove, and operation unit housing posts(40,40a) provided with a rectangular insertion groove to insert or separate the first and second door operating plates and the door main body of the overlapped state. |
