Patent ID: 8235457
Filing Date: 2012-08-07
Classification: B60R,E02F

Abstract:
1. A cabin provided for a base frame of an upper body mounted on a lower self-traveling body of a construction machine, comprising: a pair of right and left front supports disposed on the base frame; a right rear support disposed in the rear of said right front support on the base frame; a left rear support disposed in the rear of said left front support on the base frame; a right beam for coupling an upper part of said right front support and an upper part of said right rear support; a left beam for coupling an upper part of said left front support and an upper part of said left rear support; and a rear beam for coupling the upper parts of said right and left rear supports, wherein said rear beam has a first beam with right and left ends welded to said right and left rear supports respectively, and a second beam having a rear surface welded to a front surface of said first beam over the entire length of said first beam along the right and left direction, said second beam is welded to said first beam so that an upper end portion of said second beam is above an upper end portion of said first beam and a lower end portion of said second beam is above a lower end portion of said first beam, said first beam and said second beam are respectively formed by a tubular member extending in the right and left direction, and said second beam is welded to said first beam so that an upper portion of said rear surface of said second beam is above said front surface of said first beam and a lower portion of said front surface of said first beam is below said rear surface of said second beam.