| 摘要 |
PURPOSE:To obtain stable lubricating-oil-feeding by supplying the lubricating oil for a predetermined period of time, in which the air starts flowing in a pneumatic sending pipe passage, and adjusting the lubricating oil supply rate through throttling of the air-flow by means of a throttle valve so as to control the lubricating oil supply time. CONSTITUTION:Pressurized air, which is supplied to an inlet port 6 of a pneumatic sending pipe passage 5a, passes through an oriffice 11 and flows into a throttling passage 10. It is then sent by pressure to an actuator. The pressurized air closes an opening/closing valve 46 so that the lubricating oil is sucked up. After a predetermined period of time, the pressure in the throttling passage 10 becomes nearly equal to that in an air chamber 4, thereby suspending the sucking-up of lubricating oil L. Accordingly, the lubricating oil is supplied only for a predetermined period of time at an initial stage, in which the pressurized air starts flowing, and the lubricating oil supply rate is adjusted by this air pressure. With this contrivance, even a minute amount of lubricating oil can be supplied in a stable manner. |
