| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for adjusting the tension of a net rope such that the tension becomes a preset proper prescribed tension in an athletic net used for volleyball or the like, and to provide an assisting device for the adjustment. <P>SOLUTION: A condition is set with a position of the central part upper edge of the net set to be a prescribed height (H) as a first position (PO), and with a position to which the upper edge descends and stops when imparting a downward prescribed load (F) to the upper edge from a state that the net rope actually holds a prescribed tension (N) as a second position (P). In the tension adjustment of the net rope, the prescribed load (F) is imparted to the upper edge in a state where the rope holds the prescribed height (H) by a standard tension (T), it is decided whether descent positions (PL), (PH) of the upper edge having descended thereby is above or below the second position (P), and the tension is added/reduced to/from the net rope such that the descent positions (PL), (PH) of the upper edge approach the second position (P). <P>COPYRIGHT: (C)2012,JPO&INPIT |
