| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a performance line display unit by which a user can confirm how much a suspended load can be moved on an actually photographed image. <P>SOLUTION: In a crane having a rotation platform rotatably provided on a vehicle and an extendable boom provided on the rotation platform so that it can ascend and descend, the performance line display unit includes: a suspended load monitoring camera 30 that is attached to the proximity of an end of the boom; and a monitor 33 that displays the image photographed by the suspended load monitoring camera 30. A performance line of the crane is displayed to overlap a position of the image of the monitor 33 corresponding to the performance line. <P>COPYRIGHT: (C)2013,JPO&INPIT |
