Set of members forming upper frame of construction machine

Abstract

A set of members forming an upper frame of a construction machine includes a center section, a left side deck, and a right side deck. The left side deck has a left deck beam. The right side deck has a right deck beam. At least one of the left deck beam or the right deck beam is adjustment deck beams. The adjustment deck beam has a contacting part that is adapted to be brought into contact with and is also adapted to be welded to an external side surface of an adjustment-side longitudinal plate, a first opposing part that is adapted to be opposed to a side surface of the bottom plate and is also adapted to be welded to the side surface, and a second opposing part that is adapted to be opposed to an upper surface of the bottom plate with a height-adjustment gap therebetween.

What is claimed is: 
     
         1 . A set of members forming an upper frame of a construction machine, comprising:
 a center section having a bottom plate, a left longitudinal plate erected at an inner side of a left edge part of the bottom plate, and a right longitudinal plate erected at an inner side of a right edge part of the bottom plate, the left longitudinal plate and the right longitudinal plate extended in a front and rear direction;   a left side deck arranged at a left side of the center section; and   a right side deck arranged at a right side of the center section, wherein   the left side deck has a left side frame extended in a front and rear direction, and a left deck beam for coupling the left side frame to the left longitudinal plate of the center section,   the right side deck has a right side frame extended in a front and rear direction, and a right deck beam for coupling the right side frame to the right longitudinal plate of the center section,   at least one of the left deck beam or the right deck beam is an adjustment deck beam by which a height position relative to the center section can be adjusted, and   the adjustment deck beam has a contacting part that is adapted to be brought into contact with and is also adapted to be welded to an external side surface of an adjustment-side longitudinal plate opposing the adjustment deck beam out of the left longitudinal plate and the right longitudinal plate, a first opposing part that is adapted to be opposed to a side surface of the bottom plate and is also adapted to be welded to the side surface when the contacting part is brought into contact with the external side surface of the adjustment-side longitudinal plate, and a second opposing part that is adapted to be opposed to an upper surface of the bottom plate by having a height-adjustment gap in an up and down direction in a state where the contacting part is brought into contact with the external side surface of the adjustment-side longitudinal plate and also the first opposing part is opposed to the side surface of the bottom plate.   
     
     
         2 . The set of members according to  claim 1 , wherein
 the adjustment deck beam has: a beam member that has downward opening shapes and that couple an adjustment frame opposed to the adjustment-side longitudinal plate, out of the left side frame and the right side frame, to the adjustment-side longitudinal plate, an end part of the beam member at an adjustment-side longitudinal plate side configuring the contacting part; and a reinforcing plate that partially blocks the openings of the beam member, and   the reinforcing plate is arranged at a predetermined distance in a left and right direction from the contacting part such that when the contacting part of the beam member is brought into contact with the external side surface of the adjustment-side longitudinal plate, a portion of the reinforcing plate opposed to the side surface of bottom plate configures the first opposing part while a portion of the beam member opposed to an upper surface of the bottom plate configures the second opposing part.   
     
     
         3 . The set of members according to  claim 1 , wherein
 the first opposing part is opposed to the side surface of the bottom plate with a gap therebetween when the contacting part is brought into contact with the external side surface of the adjustment-side longitudinal plate, and the gap has a size small enough to allow the gap to be buried by welding between the first opposing part and the side surface of the bottom plate.   
     
     
         4 . The set of members according to  claim 2 , wherein
 the first opposing part is opposed to the side surface of the bottom plate with a gap therebetween when the contacting part is brought into contact with the external side surface of the adjustment-side longitudinal plate, and the gap has a size small enough to allow the gap to be buried by welding between the first opposing part and the side surface of the bottom plate.