| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a crusher with a simple structure capable of dispensing with a return casing for a coarse crushing blade and many parts attached thereto. Ž<P>SOLUTION: In the crusher A configured to crush a material to be crushed dropped from a hopper by cooperation of the coarse crushing blade 10, and a rotary blade 20 and a fixed blade 30, a housing H is provided with a front and rear wall 2 disposed with a predetermined interval; tie-rod axes 3 and 3 looped over both lower ends of this front and rear wall; and right and left opening doors 4 and 5 roughly closely disposed between the front and the rear walls, and also capable of rising and falling toward the outside respectively with the lower end as a fulcrum 6. The right and left opening doors have a return casing part 60 integrally formed on the inner face facing the coarse crushing blade so as to cover the coarse crushing blade respectively, and also a radius of rotation connecting the fulcrum to be a rotation center and the inner edge of the return casing part is shortened so as to allow rise and fall without abutting the inner edge 60' of the return casing part on the rotary blade. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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