Patent ID: 7980036

Claim:
A lining structure comprising lining plates each having supporting portions along the entire length of two opposite sides of a square lining plate body via bent step portions, and covering portions along the entire length of the remaining sides of the lining plate body, wherein the covering portions are flush with the lining plate body on an upper and lower surface; the lining plates being arranged in longitudinal and transverse directions on a surface to be lined; in the lining plates that are adjacent to each other in longitudinal and transverse directions, a covering portion of one of the lining plates being superposed directly over the entire length of a supporting portion of, and being butted against a lining plate body of, another of the adjacent lining plates, with the butted portion being joined by welding, with an adhesive, or a combination thereof, and the covering portion of the one of the lining plates and the butted lining plate body of the another of the lining plates providing a substantially flush surface; wherein the lining plates include first and second lining plates; wherein the first and second lining plates each have supporting portions extending from two opposite sides of a square lining plate body via bent step portions, and covering portions extending from the remaining sides of the lining plate body; wherein each first lining plate has protruding portions extending from the ends of the supporting portions in extending directions of the supporting portion-bearing sides of the lining plate body; wherein each second lining plate has spaces that are located at the sides of the ends of the supporting portions and that have a different level from the covering portions, the spaces being used as introduction portions for introducing supporting portions and protruding portions; wherein the first and second lining plates are arranged alternately in longitudinal and transverse directions to form a staggered pattern; wherein in the first and second lining plates that are adjacent to each other in longitudinal and transverse directions, a covering portion of one of the lining plates is superposed on a supporting portion of, and is butted against the lining plate body of, another of the lining plates; and wherein a protruding portion of a supporting portion of the first lining plates underlies a covering portion of the second lining plates through an introduction portion of the second lining plate, and is located between ends of supporting portions of the second lining plates that are adjacent to each other in a diagonal direction, so that the supporting portions and protruding portions restrict the movement of the lining plates.