| 摘要 |
<p>PURPOSE:To save a space and a cost by providing a circulating system for interconnecting the delivery port of an oil feed pump and the return port of a storage tank, and an oil feed system having opening closing control valves and feed oil tanks, located in a plurality of branch pipes, and connecting a device to feed oil to each device to be lubricated to each of the feed oil tanks. CONSTITUTION:When enough lubricating oil is present in a feed oil tank 9 of each machine tool MC, the feed of lubricating oil is continued by means of an oil feeding device 12, and an oil feed pump 3 is brought into a stop state. When an oil feed signal is outputted from the low level switch of the feed oil tank 9 of some machine tool 11, the oil feed pump 3 is started. After oil is circulated in a circulating system 1, a corresponding opening closing control valve 8 is opened and lubricating oil is supplied to the feed oil tank 9, and the opening closing control valve 8 is switched by means of a stop signal from a high level switch to close a switching branch pipe 7. When an oil feed signal from the one feed oil tank 9 is outputted during supply of oil through one branch pipe 7, respective control opening closing valves 8 are operated and a corresponding branch pipe 7 is released to feed oil. After a stop signal for a whole oil feed system is outputted, the oil feed pump 3 is brought into a stop.</p> |
