PURPOSE: To provide a decorative tile wherein the strength of a joint between a decorative drum and a back drum is improved and a commercial value is high.
CONSTITUTION: A decorative tile is formed in such a manner that a box-form decorative drum 11 having a cylindrical protrusion edge part 11b protruding by a given length from the peripheral edge of a front plate part 11a to the back and being opened to the back side and a box-form back drum 12 having a protrusion edge part 12b protruding by a given length from the peripheral edge of a back plate part 12a to the obverse side and opening to the obverse side are joined in such a state that the two protruding edge parts 11b and 12b are fitted in each other. In the decorative tile, an annular fit-in recess 11c extending by a given length from an opening end to the obverse side is formed in the inner peripheral side of the protrusion edge part 11b of the decorative drum 11. The outer periphery of the protrusion edge part 12b of the back drum 12 is set approximately to the same size as that of the inner periphery of the engaging recess 11c and the length of the protrusion edge part 12b is set approximately to the same length as that of the engaging recess 11c. The protrusion edge part 12b of the back drum 12 is fitted in the fit-in recess 11c of the decorative drum 11 for joining. The length of a joint is increased and the joint is positioned on the reverse side.
MATSUNAGA HARUO
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