Patent ID: 7849654

Claim:
A flooring system, comprising a plurality of flooring blocks, each flooring block having: a square-shaped block main body with concave portions and convex portions which make concave-convex engagement with adjacent flooring blocks, the concave and convex portion being formed on respective sides of the block main body, block main body side pin insertion paths perforated across the concave portions in the block main body along the sides on which the concave portions are formed, convex portion side pin insertion paths perforated in the convex portions, which communicate coaxially with the block main body side pin insertion paths in a state that the convex portions are engaged with concave portions of adjacent flooring blocks, lock pins including pin main bodies and handle portions projecting sideways, the pin main bodies are inserted rotatably and slidably in the block main body side pin insertion paths, and each lock pin has a joining position wherein the lock pin is disposed across one of the concave portions and has a housed position wherein the lock pin is withdrawn from the one concave portion, each block main body side pin insertion path is partially formed into an open groove opened to a block main body surface, and in this open groove, a first lateral groove is provided in which the handle portion of the pin main body is sunk, when at the joining position, and a second lateral groove is provided in which the handle portion of the pin main body is sunk, when at the housed position, and adjacent flooring blocks type being joinable by sliding the pin main body of the lock pin to the joining position in the state that the concave portion and the convex portion of adjacent flooring blocks are engaged with each other.