| 摘要 |
PURPOSE:To simply alter a set stop position by a method in which a set stop position memory is provided for both setters for stopping left and right slewing operations and a set stop position to be indicated to a controller from both the setters is taken out of the memory. CONSTITUTION:A slewing base 3 with a working device 1 is provided for a traveler vehicle 4 in a bilaterally drive turning manner, and bilaterally stopping setters 12A and 12B to store stop positions by operation of a setting switch 16 for stopping at a position to stop the base 3 automatically are provided. The setters 12A and 12B are provided with set stop position-memories 17. Automatic stoppage is made by providing a select switch 18 to select by switching operation as to whether set stop positions to be indicated from the setters 12A and 12B to the controller 13 are taken out of the memories 17 or not. The operating efficiency of the working device and also of slewing can thus be more raised.
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