| 摘要 |
PROBLEM TO BE SOLVED: To lessen work effort which has to be exercised by an operator by reducing the outer diameter of an installed hood, in a jet nozzle disclosed previously in patent No.291701. SOLUTION: In the spray gun device of such a structure that a jet nozzle body of a coating liquid is formed in the center part and a hood body is mounted, in a freely attachable/detachable manner, surrounding the jet nozzle body, a ringlike recess chamber is formed in the hood body and a plurality of main through holes are perforates, at an equal interval, at the front of the hood body. Further, the main through holes are made to a communicate with the recess chamber and an introduction pipe through which compressed air is blown in from outside is connected to the interior of the recess chamber. Besides, a plurality of atmospheric inflow holes of a specified size for the inflow of open air are formed between the inner peripheral face, to which the nozzle body is fitted, of the hood body and the outer peripheral face of the nozzle body.
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