| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fire-fighting hose coupling metal fitting capable of reducing the mounting force of a male metal fitting to a female metal fitting while ensuring the urging force in the diametric direction of a coupling nail at a predetermined position and capable of relatively increasing the decoupling force of the male metal fitting from the female metal fitting. Ž<P>SOLUTION: The female metal fitting 2 constituting the fire-fighting hose coupling metal fitting includes a receiving metal fitting connectable to a fire-fighting hose, an almost cylindrical clamp ring 6 attached to the receiving metal fitting in a detachable manner, an almost annular nail seat 7 attached to the clamp ring 6 on its inner peripheral side, the coupling nail 8 inwardly protruded in its radial direction from the inner peripheral surface of the nail seat 7 to be coupled with the male fitting, and an urging member 9 arranged between the clamp ring 6 and the coupling nail 8 and inwardly urging the coupling nail 8 in the radial direction. The urging member 9 includes a first leaf spring 14 and the second leaf spring 15 arranged on the outside in the radial direction from the first leaf spring 14. The first leaf spring 14 is formed so as to be longer than the second leaf spring 15 and both end sides of the first leaf spring 14 abut on the inner peripheral surface 6c of the clamp ring 6. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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