| 摘要 |
PROBLEM TO BE SOLVED: To provide a saw-toothed lattice plate of a stepped filter, capable of being increased in its installation angle and capable of certainly transferring a solid upwardly. SOLUTION: The saw-toothed lattice plate comprising a long plate material has a plurality of step surfaces 100A and 200A formed so as to be downwardly inclined at a predetermined angle in a wastewater flow direction and stepped surfaces 100B and 200B connecting the respective step surfaces 100A and 200A and having recessed surface shapes. Since a plurality of the step surfaces 100A and 200A formed so as to be downwardly inclined at the predetermined angle in the wastewater flow direction, even if the installation angle of a stepped filter is made large, the solid on the fixed step surface 200A is certainly transferred upwardly without being interfered with the corner of the saw-toothed lattice plate on a movable side. Even if a water channel becomes deep, the dimension of the stepped filter can be reduced and the stepped filter can be structurally stabilized.
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