Patent ID: 7887124
Filing Date: 2011-02-15
Classification: B62D,E02F

Abstract:
1. A cab structure for a construction machine that is fixedly arranged on a revolving unit that is revolvably mounted on a lower traveling unit, and includes an arc part that is formed along a revolution circle on one side surface of a cab not to extend outside of a predetermined revolving radius, wherein the cab structure comprising: first pole members that extend from a front-right end to a rear-right end of the cab, and from a front-left end to a rear-left end of the cab, each of the first pole members including a pipe member that is bent in a substantially L shape, the pipe member including a pole portion that is substantially arranged along a vertical direction and a beam portion that is substantially arranged along a horizontal direction; second pole members that are substantially arranged along the vertical direction at the rear-right end and the rear-left end of the cab, wherein each of the second pole members includes a substantially straight pipe member, and an upper end of one of the second pole members that is arranged at a rear end of the one side surface on a side that includes said arc part is deviated from a plane that is defined by one of said first pole members on the side that includes said arc part, the second pole members and the pole portions of the first pole members being respectively disposed at four corners of a substantially box-shaped cab formed by the cab structure; and a first joint member disposed at a rear end part of the cab structure, and coupling the upper ends of said second pole members to each other, and coupling a rear end of said beam portion of the one of said first pole members and the upper end of the one of said second pole members to each other, the first joint member being a sheet metal member that has a substantially L shape in cross-section.