Patent ID: 8109803

Claim:
An assembling block comprising: first and second block plates ( 1 ) having square and equilateral triangular plan shapes, respectively, and formed of molded plastic; and a joint ( 2 ) configured to connect said first and second block plates ( 1 ) together; wherein each of said block plates ( 1 ) includes seat portions ( 3 ) provided along respective sides of the block plate at both ends of each of the respective sides, each of said seat portions having a step at an inner portion thereof, and retaining pieces ( 4 ) extending from a center portion of the block plate to an outer edge thereof; wherein each of said block plates is provided with a pair of first engagement parts that are spaced apart from one another; wherein said joint is provided with a first pair of second engagement parts that are spaced apart from one another, and a second pair of second engagement parts that are spaced apart from one another; wherein said first engagement parts are constituted by one of engagement protrusions and engagement holes; wherein said second engagement parts are constituted by the other of engagement protrusions and engagement holes; wherein each of said pairs of first engagement parts are respectively configured and spaced apart so as to be engageable with each of said pairs of second engagement parts; wherein, for each of said block plates, said first engagement parts are formed at said seat portions thereof; wherein, for each of said block plates, said retaining pieces are spaced from respective ones of the seat portions ( 3 ) in a thickness direction of the respective block plate, such that said joint can be inserted between one of said retaining pieces and a pair of said seat portions; and wherein said first and second block plates and said joint are configured such that, when a first side part of said joint is inserted between a first one of said retaining pieces and a first pair of said seat portions of either one of said first and second block plates, a respective pair of the engagement protrusions engage in a respective pair of the engagement holes and a first side edge of said joint abuts against the steps of said first pair of said seat portions, and when a second side part of said joint is inserted between a second one of said retaining pieces and a second pair of said seat portions of the other one of said first and second block plates, a second pair of the engagement protrusions engage in a second pair of the engagement holes and a second side edge of said joint abuts against the steps of said second pair of said seat portions, such that said first and second block plates are connected together by said joint.