| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for washing a cutting edge capable of achieving a specified purpose with a relatively simple equipment by using water stored in a caisson as recycle use so that the ground water stored in the caisson can be effectively used for washing the cutting edge. SOLUTION: A cutting edge taper face 12 is washed by bottoming a washing device 13 on an inside bottom of a caisson skeleton 1 and moving an injection unit 15 up and down by elevation operation which is guided and supported by a guide frame 18 of a stand 14. The injection unit 15 connects an injection nozzle 23 to a discharge side of a side pump 22, injects a water air jet by mixing a compressed air with the water in the caisson skeleton 1 to the cutting edge taper face 12 and removes an earth and sand remained at a lower part area while washing the cutting edge taper face 12. COPYRIGHT: (C)2008,JPO&INPIT
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