| 摘要 |
<p>PROBLEM TO BE SOLVED: To simplify structure of a rotary joint, to reduce weight thereof, to reduce cost of a sealing part, and reduce active energy. SOLUTION: A second connection passage 20B is located between a second passage 3B and a second communicating passage 13B and formed into a circular groove; sealing parts 30, 30 are provided at a gap 21 between facing circumferential surfaces of a case body 10 and a rotor 2, disposed on both sides of the second connection passage 20B so as to seal between the facing surfaces gap 21 between the facing circumferential surfaces.</p> |
