PURPOSE: To facilitate a change of a seat position with a simple structure by connecting an upper frame and a lower frame via a deformable specific X- shaped link mechanism so as to be capable of being elevated or lowered and capable of changing its seat angle.
CONSTITUTION: In a seat with an adjusting mechanism in which both the height and the seat angle are simultaneously adjustable, in an operator's seat of a construction machine, the rear end side surface of an upper frame 1 and the front end side surface of a lower frame 2 are connected with a link 3, and also the rear end side surface of the lower frame 2 and the central part of the link 3 are connected with a link 5. Further, the front end side surface of the upper frame 1 and the central part of the link 3 are connected with a link 4; and the link pins 13, 7 provided on the upper end part of the link 4 and the lower end part of the link 3 respectively are slidably engaged with the adjusting grooves 14, 8 formed in the respective frames 1, 2. And the respective pins 13, 7 are locked by engagedly inserting them in any of the engaging holes in the locks 15, 9 which have been supported by the respective frames 1, 2.
SOGAWA MASANORI
HIRAOKA TAKESHI
NODA SHIGEHIRO
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