| 摘要 |
PROBLEM TO BE SOLVED: To provide a screen having a double-layered structure, constituted so as to repel a powdery substance ready to adhere to ropes by largely undulating an upper screen by the vibration of sieving machine and improved in sieving efficiency to prevent the generation of the adhesion clogging or thrust clogging caused by a wicked substance to be treated containing much moisture such as a coal powder, a limestone powder or the like, and a vibration sieving machine using the same. SOLUTION: The screen 1 having the double layered structure consists of a lower screen 3, which is formed by allowing longitudinal ropes 6a and transvese ropes 7a to cross at right angles to laminate them and bonding the crossing parts of the ropes so as to form mesh parts 8 having an arbitrary shape and has hooked locking parts 5 provided to the end parts in the width direction thereof, and an upper screen 2 which is formed by allowing longitudinal ropes 6 and transverse ropes 7 to cross at right angles to laminate them and bonding the crossing points of the ropes so as to form mesh parts 8. The upper screen 2 is joined to the lower screen 3 at the upper end part 9 thereof and there is no gap between the upper and lower screens 2, 3.
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