| 摘要 |
<p>PURPOSE:To enable safe, sure and quick work by outputting a signal to a warning means of an alarm, an operation cancellation device, etc., when a judgment function judges a separation line previously set to pass and the separation to be in a gradual decrease state. CONSTITUTION:One or plural separation lines 17a, 17c, 17f, etc., are optionally set up in a safer position having room than the minimum separation 16 by a command from the outside and stored to a controller 11. Then, a process signal to operate a warning means is output from the controller 11 by the action of an operation function and a judgment function within the controller 11 when an obstruction 13 gradually approaches a car body to positions a, b, c, d, e, f and g. A driver can detect an approximate distance between a counter weight 9 and the obstruction 13 because a different process signal is input to an alarm device, etc., every time the obstruction 13 passes the separation line 17a, 17c or 17f in this case.</p> |
