| 摘要 |
PURPOSE:To improve the reliability of a tie-wire by a method wherein the tie- wire is secured of a predetermined amount of movement by the provision of a specific gap between a hole in a movable wing and the tie-wire so that even when the tie-wire is rusted, the movement thereof is not obstructed. CONSTITUTION:The gap is provided between the hole 5b in the movable wing 3 and the tie-wire 4. This gap is so formed as to satisfy the equation of d1/d2<= 0.97 wherein d2 is the inner diameter of the hole 5b and d1 is the outer diameter of the tie-wire. With the above structure, even when the tie-wire gets scaled or rusted, the movement thereof is not obstructed because the above-mentioned proper gap is secured. |
