| 摘要 |
<p>PROBLEM TO BE SOLVED: To keep a desired purification capacity by an easy operation by forming a flat actuation piece in a spherical shell for forming through holes, housing a carrier comprising a porous material in the housing space of the shell, and floating it on water. SOLUTION: A spherical shell, with its whole shape made spherical, has a hollow housing space and forms semispherical spherical shell parts 27, 28. A through hole 25 is formed in one spherical shell part 27, and an engagement hole 31 is formed in the connection piece 30 of its connection end 29. The through hole 25 is formed in the other spherical shell part 28, and an engagement projection part 34 which is engaged with the hole 31 is formed in the connection piece 33 of its connection end 32. In the housing space of the spherical shell, space parts are formed by actuation pieces 19 and partition members 20, carriers 21, 22, 23 are put in these space parts to be floated on water. With the engagement projection part 34 engaged with the engagement hole 31, the free end part of the projection part 34 is fusion-bonded to the connection piece 30.</p> |
