| 摘要 |
The present invention relates to a differential pulling device for successively opening and closing a plurality of sliding doors provided to various structures such as a gymnasium, a warehouse, and a sluice and, more specifically, to a differential pulling device provided between the adjacent sliding doors so as to successively open or close each sliding door provided at a plurality of openings arranged to be spaced from each other in a line. The differential pulling device of the present invention comprises: a first shaft of which one end portion is coupled to one sliding door and the other end portion has at an accommodation part, which has a pipe shape of which one side is open; and a second shaft of which one end portion is coupled to the other sliding door and the other end portion is inserted into the opened one side of the accommodation part of the first shaft and slidably accommodated therein, wherein the second shaft has a protruding part formed on the outer peripheral surface of the other end portion thereof and caught by one side of the accommodation part. |
