| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a sealing device capable of certainly preventing intrusion of a foreign matter to the inside of a main spindle, etc., reducing cost and coping with the sealing with energy saving even in the case when an electric power supply to the device is cut, etc. <P>SOLUTION: This sealing device is furnished with temperature detection sensors 4a, 4b to detect temperature inside the main spindle device 21, a temperature detection sensor 4c to detect temperature outside the main spindle device 21, a rotating speed detection sensor 5 to detect rotating speed of the main spindle 22, an air supplying device 2 to supply compressed air to the inside of the main spindle device 21 and a control device 3 electrically connected to each of the sensors 4a, 4b, 4c, 5 to control necessity of supply of the compressed air to the inside of the main spindle device 21 by the air supplying device 2 in accordance with the temperature inside the main spindle device 21, the temperature outside the main spindle device 21 and the rotating speed of the main spindle 22 detected by each of the sensors. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
