| 摘要 |
PURPOSE:To make operation easier and reliability higher by moving a fastener consisting of an N-T alloy in a concentrical state onto a coupler and tightening the coupler by the directional effect of the N-T alloy which restores the shape of the memorized base phase thereby fixing the coupler and inside frame. CONSTITUTION:The Ni-Ti alloy (expressed as N-T alloy hereunder) which is set at <=30 deg.C martensite transformation temp. is used for either case of a shape memory alloy or superelastic alloy. The fastener 11 formed of such N-T alloy to an annular shape is so formed that the inside diameter of the ring thereof is smaller by, for example, about 4% than the outside diameter of the coupler to be connected and fixed at the martensite transformation temp. or above. The inside diameter thereof is preliminarily expanded by about 7-8% and is held by a holding part. The coupler 62 is forced into an inside frame 12 by the force at which the N-T alloy restores the memorized shape by which an optical fiber cord 61 is held to the connector. |
