<p>The present invention includes an up-down door in a shelter and stops the up-down door in an area with door posts with partially rotatable upper parts through a location fixing sensor to open or close the door. The door posts rotate the upper rotor units when a crane passes through not to get in the way of the crane. Accordingly, the present invention enhances space utilization and enables equipment to be used without interference in the movement of the crane. The present invention can also safely protect an operator from rain, wind, and cold weather to enhance the work efficiency.</p>
