US Patent 8240745 Construction machine

In a construction machine wherein a cab is mounted on an upper frame of an upper rotating body through an anti-vibration mount, a guard member for protecting the cab in the event of a roll over of the construction machine is mounted so as to extend from a front face portion to a ceiling of the cab, and a lower end of a front portion of the guard member which front portion covers the front face portion of the cab is fixed to a front end portion of the upper frame by a fixing mechanism which permits movement of the cab created in both vertical and horizontal directions by the anti-vibration mount.