| 摘要 |
PURPOSE:To obtain stable oil-feeding by supplying lubricating oil for a predeter mined 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:When the pressurized air starts flowing in a pneumatic sending pipe passage 2, a diaphragm 2a goes downward, thereby opening a closing valve 24. As a result, the lubricating oil is supplied into a pipe joint 1. After a predetermined period of time, when the pressure in a chamber 38 becomes lower than a predetermined value, the closing valve 24 is closed, thereby suspending the supply of the lubricating oil. With this contrivance, 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 in accordance with the length of time of pneumatic sending. Thus, even a minute amount of lubricating oil can be supplied in a stable manner. |
