Door locking device and construction machine including same

A construction machine including a door locking device, comprising:

• a lower traveling structure;
• an upper frame swingably mounted on the lower traveling structure;
• a cabin, an engine room, and a work apparatus mounted on the upper frame;
• a side door openably/closably mounted on a side of the engine room;
• a locking device case mounted on the side door;
• a manipulation handle rotatably fixed to the case;
• a striker mounted on a door frame that openably/closably supports the side door;
• a link rotatably fixed to the case and connected at a lower end thereof to a rotary plate that operates in cooperation with the manipulation handle upon manipulating the manipulation handle;
• and
• a latch member having first and second latch plates connected to an upper end of the link so as to be separated from the manipulation handle and mounted on an inner surface of the side door so as to positioned above the case so that the first and second latch plates are operated in cooperation with the manipulation handle by means of the link so as to be locked to or unlocked from the striker when the manipulation handle is manipulated.