| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a protective plug for three-way cocks which reliably prevents a chemical etc. from flowing into unused branch tubes by stably keeping the disconnected state of the unused branch tubes. <P>SOLUTION: The protective plug for the three-way cocks A, B is provided with: a cylinder part G; three branch tubes C1, C2 and C3 whose respectively one ends are communicated with the inside of the cylinder part G, which respectively have an open tube D at the other ends and which are provided projecting in the form of T at the outer periphery of the cylinder part G; a sliding part F which has a T-formed path inside and which is inserted to the inner peripheral surface of the cylinder part G liquid-tight and in a freely rotatable state; and one or a plurality of operation levers E which are connected with the sliding part F to rotate the sliding part F. The protective plug is provided with: a shielding part 4 which shields the tube mouth D1 of one of the branch tubes C1 and which is held by the branch tube C1; and an inhibition part 3 which is extended from the shielding part 4 to the side of the operation levers E to inhibit the rotation of the operation levers E. <P>COPYRIGHT: (C)2007,JPO&INPIT |
