| 摘要 |
PROBLEM TO BE SOLVED: To provide an oil supply nozzle closing a valve by securely operating an automatic valve closing mechanism even when the flow rate is restricted. SOLUTION: The oil supply nozzle includes: a main valve 23 that is opened by an oil supply lever 22; a check valve 40 disposed downstream of the main valve 23 and opened by the pressure of a liquid; and the automatic valve closing mechanism 30 that communicates with an air tube 52 (one end of which communicates with the a nozzle tube tip 10) and a negative pressure generating area disposed downstream of the check valve 40, and that closes the main valve 23 by a predetermined negative pressure. The check valve 40 is composed of a main check valve 41 of a large diameter and a sub-check valve of a small diameter located on the center axis of the main check valve. The downstream side of the sub-check valve communicates with the other end of the air end and the automatic valve closing mechanism 30. COPYRIGHT: (C)2009,JPO&INPIT
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