| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the deformation of a column frame associated with vibration given to a vehicle body by improving the durability of a first bolt and a second bolt for fastening a girder section extending in the longitudinal direction of the vehicle body. <P>SOLUTION: A column frame structure for a working machine, which is provided on a hydraulic shovel, includes a first end plate 90B integrally provided at the front end of a girder section 90A of a beam 90 extending in the longitudinal direction of a revolving superstructure 2, and having a surface part included in a vertical plane perpendicular to the extending direction of the girder section 90A and abutting on a first column 80, a second end plate 90C integrally provided at the rear end of the girder section 90A, and having a surface part included in the vertical plane perpendicular to the extending direction of the girder section 90A and abutting on a second column 81, a first bolt 90D having a shaft part with its axial direction set along the extending direction of the girder section 90A, for fastening the first end plate 90B to the first column 80, and a second bolt 90E having a shaft part with its axial direction set along the extending direction of the girder section 90A, for fastening the second end plate 90C to the second column 81. <P>COPYRIGHT: (C)2013,JPO&INPIT |
