| 摘要 |
In an impact crusher, a rise of an advancing-retracting portion ( 65 ) of a gap adjuster ( 60 ) caused when a rebound plate ( 33 ) touches a rotor ( 32 ) or the rotation amount of the rotor ( 32 ) is detected to determine a zero-point position of the rebound plate ( 33 ) is determined based on the detected result, so that the zero-point position can be securely determined since it is not necessary to touch and vibrate the rebound plate with the rotor rotating at a high speed, and since the rebound plate ( 33 ) is not vibrated, the zero-point position can be securely determined without being influenced by the abrasion of the rebound plate ( 33 ) and the impact plate ( 322 ), thereby accurately adjusting gap (C).
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