| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a ladle crane which can protect a motor control device arranged in a crane body, from vibration of the crane body which is running. <P>SOLUTION: In the ladle crane including a girder 1, a main winding device 4 mounted on the girder 1, and a main hook 3 which is hung through a wire from the main winding device 4, and which is lifted up and down by winding up and down of the main winding device 4, the motor control device 20 is provided for controlling a winding up and down speed by a motor 6 of the main winding device 4, and speed control is performed by a high pressure matrix converter of the motor control device 20. The motor control device 20 attached to the girder 1 through a vibration prevention rubber 40 of all directions vibration attenuating type, includes a fixing bar 52 for fixing an upper part of a built-in multi-winding transformer 50 to a casing frame 24, a recess part 66 into which an upper part and a rear part of wheels 62 and 63 of the built-in cell 61 are inserted, and a fixed seat 65. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
