What should be the mechanism of opening the flap of the vacuum chamber of the welding machine?

1) we only Need to make grooves in the wall and doors to drown them a little deeper, and the axle is exactly where it should be.

2) it is Possible to take system from three hinges and the person, closing a door, will simply lean it or press into an aperture.

3) the simplest solution may be rails or guides.