| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily absorb core dislocation of two joints for constituting a coupler. SOLUTION: A first valve chest 15 and a first valve seat 17 are arranged rightward in order in a left side first joint 1, and a second valve chest 65 and a second valve seat 67 are arranged leftward in order in a right side second joint 51. An annular sealing tool 21 is arranged on a first tip surface 19 arranged on a peripheral wall of the first valve seat 17, and the sealing tool 21 is projected rightward more than the first tip surface 19. A ball-like first closing member 23 inserted into the first valve chest 15 is allowed to abut to the first valve seat 17 by a first closing spring 25, and is projected rightward more than the first tip surface 19 and the sealing tool 21. A ball-like second sealing member 73 inserted into the second valve chest 65 is allowed to abut to the second valve seat 67 by a second closing spring 75, and is projected leftward more than a second tip surface 69.</p> |
