The present invention within the chimney to improve the structure of the ladder that apply to marine narrow chimney place, I offer each one as a ladder on the outside of the chimney, the orbital rotation along the outer circumference can be done in a desired position during maintenance work or cleaning of the chimney, and to improve space utilization. Ladder structure of the vessel according to the invention the chimney, chimney on one side of the lower vessel fitted removably coupled to the fitting groove in the periphery of the distal end 10, 320 is formed on the other side of the circumferential groove and the rail 310 are formed, a chimney (10) inside the operator's access to the available aperture 330 formed in the upper insertion hole having a central portion (300) and; Once the insertion hole in the upper part is coupled to the rail groove 310 of 300 is disposed a first caster members 140 are rotated along the inner circumferential surface of the rail groove 310, the chimney to the other end 10 first and second clamping members (410,420) of the guide rail 405, a second member rotatably coupled to the caster in accordance with 150 is disposed to be rotatable along the outer circumferential periphery of the bottom, up and down a plurality of spaced-apart the bar 120 and a ladder body (100) which is supported on either side side rails (110); And removably coupling the coupling member with each other to enclose the lower outer periphery of the ladder via the main body 100, the second caster members 150 are rotated so that the guide rail track 405 is formed in the first and second clamping members (410 420); And arranged on the other end of the ladder body 100, end rotatably disposed support 200 for supporting the lower end of the ladder body 100 by the frictional force with the ground during rotation of the end; with a characterized in that. ; 展开▼
