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    • 10. 发明专利
    • CRUSHER
    • JPH09215940A
    • 1997-08-19
    • JP4670296
    • 1996-02-08
    • HITACHI CONSTRUCTION MACHINERY
    • SHIOHATA TADASHIIIDA TAKEO
    • B02C21/02B02C23/02
    • PROBLEM TO BE SOLVED: To shorten time for transportation and arrangement in the field by providing a driving apparatus for supporting a feeder by means of an ascent/ descent frame and moving up and down the feeder by extending/contracting the ascent/descent frame. SOLUTION: During crushing operation, by elevating a feeder 8 by extending a hydraulic cylinder 18 and making a reciprocating frame 22 move back and forth by extending/contracting a hydraulic cylinder 23, a substance to be crushed fed in a hopper 20 by means of a hydraulic shovel, a loader etc., is made to fall down into the primary crushing part 3 and is crushed by means of a crushing roll 10 and furthermore, crushed by means of a crushing roll 11 in the secondary crushing part 4. On the other hand, during transportation, by contracting the hydraulic cylinder 18 and lowering the feeder 8 thereby, the height of the crusher is lowered. This height is the height so as to make the total height including a truck and the crusher within the limiting height for transportation when a trailer truck or a transport truck is loaded with this crusher.