| 摘要 |
PURPOSE: A drilling device for an automatic binder is provided to prevent the damage of the binder by operating a drilling motor and a drill in a load reducing state when an overload sensor detects the overload of a lifting motor. CONSTITUTION: In a drilling device for an automatic binder, an overload sensor(S) is installed at a lifting motor(M2). And, the overload sensor detects the overload of the lifting motor, and is connected to a motor control unit(30). The motor control unit moves a drilling motor(M1) and a drill(5) up/down in a load reducing state when the overload sensor detects the overload of the lifting motor.
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