| 摘要 |
PROBLEM TO BE SOLVED: To secure a wide space within a cab while avoiding interference between a device which is mounted in a revolving super structure and the cab.SOLUTION: At an edge of a floor plate 31 of a cab 30, a floor-side expanding part 31a is provided while being expanded upward partially. A frame-side expanding part 34a is provided which is expanded upward partially in accordance with the floor-side expanding part 31a. A lower edge frame 34 is fastened and fixed onto the floor plate 31 by a fastening bolt 45. A swivel joint 50 is disposed at a lower side of the floor-side expanding part 31a so as to be overlapped with the floor-side expanding part 31a partially in a plan view. |
