| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a drain device designed so as not to stain a floor surface and a worker's hand by preventing drain from flowing outside during draining. SOLUTION: A piston 6 is pressed upward by a spring 7, an outer peripheral wall surface part 6b and an inner peripheral wall surface 10a of a slit pipe 10 make liquidtightly contact with each other in this state, and consequently, drain 5 is not discharged. In the meantime, at this time, a connecting click 6c on a lower end part of the piston 6 and a connecting click 11a on an upper end part of a drain cock 11 are engaged with each other or in a state nearly engaged, and in the case of manual operation, these connecting clicks 6c, 11a are engaged with each other by rotating the drain cock 11, and drain is discharged in arrow B, C directions by lowering the piston 6 downward with the drain cock 11.</p> |
