| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the environment of a working region by preventing a fall on a ground surface or the like of a lubricating oil such as grease. <P>SOLUTION: A boom cylinder 19 is pin-connected to a bracket 6C for the cylinder for a revolving frame 3 by using a bearing device 22. A box-shaped receiving vessel 27 is installed to the bottom plate 4 of the revolving frame 3 while being positioned on the lower side of the bearing device 22. Accordingly, lubricating oil G leaking out from the bearing device 22 can be received by the receiving vessel 27, and the fall on the ground surface or the like of the lubricating oil G can be prevented. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
