| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of blowout of a working liquid from a blowout nozzle being delayed, when supplying the working liquid from a supply source or working liquid is dripped from the blowout nozzle during the stop of supply in a working liquid supplying mechanism, for supplying the working liquid from the supply source through a channel to the blowout nozzle in a working region. SOLUTION: On a channel (16) located close to a blowout nozzle (14), a valve means (20) is provided for stopping the flow-out of the working liquid in the channel (16) toward the blowout nozzle (14), when supplying no working liquid from a working liquid supply source (18), and for permitting the flow-out by being opened by the flow of the working liquid when that working liquid is supplied. |
