ADAPTER IMPARTED WITH FITTING, CONNECTING AND CLEANING FUNCTION AND SPRAY NOZZLE WITH SELF-CLEANING FUNCTION

摘要

PROBLEM TO BE SOLVED: To provide coupling constitution of a tubular body and an adapter which can self-clean the impurities sticking to the outer periphery of a coupling part inclusive of an injection hole and the inside of the coupling part of the tubular body and the adapter simultaneously with cleaning and cooling action by partly branching and refluxing the cleaning and cooling liquid supplied through the adapter to the tubular body and can prevent the dislodgment of the coupling of the tubular body and the adapter and the generation of foreign matter. SOLUTION: The outer peripheral surface of the adapter which is fitted and fixed to one end opening in the shaft hole direction of the tubular body and connects the tubular body to a liquid supply pipe is provided with a flange having a reflection surface to segment a spacing from the end face at the opening end of the tubular body and a liquid reflux path communicating with the spacing from the end face at the fitting end of the adapter to reflux part of the liquid supplied to the inside of the tubular body to the reflection surface of the flange and to inject the liquid toward the outer periphery in the coupling part of the tubular body and the adapter from the spacing. If a spray nozzle is used as the tubular body, the self-cleaning to the spraying part of the nozzle may be achieved by the refluxed and injected liquid.