| 摘要 |
PROBLEM TO BE SOLVED: To provide a crusher pivoting a rocking crushing arm preventing spaces between cutting blades from increasing with simple structure and at a low cost. SOLUTION: The crusher is provided with a movable arm pivoting part 11 pivoting a movable arm 20 to a frame 60, the movable arm pivoting part 11 comprising an arm pin 30, a press ring 31 restricting lateral moving of the movable arm 20, a fastening ring 35 pressing the pressing ring 31, and a fixing ring 34 fixing the fastening ring 35 to the frame. The fastening ring 35 is composed of a pair of large and small ring members 32, 33, the outer peripheral face of the arm pin 30 and the inner peripheral face of the smaller ring member 32, and the outer peripheral face of the larger member 33 and the inner peripheral face of the fixing ring 34 are respectively fastened by screws. The screw pitches of the two sets of the screw connection are made different. COPYRIGHT: (C)2010,JPO&INPIT
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