| 摘要 |
A shredder for shredding metal shavings, chips and the like includes a housing (10) containing a shredder assembly having first and second roller motor-operated shafts (40, 42) carrying spaced knives (50) for shredding metal. A sensor (66, 68) on at least one shaft (40, 42) senses a change in rotation of the shaft, indicative of a jammed condition. A microprocessor (70) responds to the sensor to open an ejection door (20) normally closing an ejection outlet (16) and to reverse rotation of the shaft (42) to dislodge the jamming object. When the jamming object is dislodged, the microprocessor halts rotation of one shaft (40) to permit the knives on the reverse rotating shaft (42) to carry the jamming object toward the open ejection outlet (16). After the object has been ejected, the microprocessor (70) returns the shafts (40, 42) to their normal operation to continue shredding metal. A cleaning assembly (54, 56) is provided with cleaning fingers (58) to clean debris from the space between the knives and is provided with guide fingers (72, 73) to guide metal to be shredded to the shredder assembly and to guide jamming objects from the shredder assembly to the ejection outlet (16).
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