Patent ID: 8925663
Filing Date: 2015-01-06
Classification: B60H,E02F

Abstract:
1. A construction machine comprising: an automotive lower traveling structure, an upper revolving structure rotatably mounted on said lower traveling structure, and a working mechanism provided capable of moving upward/downward on said upper revolving structure, comprising: said upper revolving structure is provided with a revolving frame forming a support structural body, a floor member provided on said revolving frame, in which the rear side is an operator's seat mounting portion on which an operator's seat is mounted and the front side is a foot rest portion on which the operator places the foot, a cab box provided by covering a periphery and an upper part of said floor member in order to form an operator's room on said floor member, an indoor unit for an air conditioner arranged on said floor member and supplying sucked air into said cab box as conditioned air, an outdoor air inlet port provided by being opened to the outside of said cab box, and an outdoor air duct provided by connecting said outdoor air inlet port and said indoor unit and supplying the outdoor air introduced through said outdoor air inlet port into said indoor unit, wherein: said outdoor air duct is arranged so that an intermediate portion between said outdoor air inlet port and said indoor unit passes between a side surface portion of said cab box and a side portion of said operator's seat; said outdoor air duct is formed having an inverted U-shape so that said intermediate portion comes to a highest position; a filter accommodation portion is provided in said intermediate portion of said outdoor air duct and has a filter mounting port opened upward in said cab box; and an outdoor air filter for trapping dusts in the outdoor air flowing through said outdoor air duct is configured to be accommodated in said filter accommodating portion capable of being attached and removed through said filter mounting port.