# US 8,769,897 B2 · Remaining formwork for decoration, and wall surface structure of concrete structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,769,897 B2 - Document ID: US8769897B2 - Status: Granted - Kind: B2 - Application number: 14/003,839 - Filed: 2011-03-10 - Published: 2014-01-02 - Granted: 2014-07-08 - Earliest claimed: 2011-03-10 - Assignees: Wpc Corporation; Kengo Kuma and Associates - Applicants: Takeyasu Kikuchi; Seiichi Fukawa; Kengo Kuma - Inventors: Takeyasu Kikuchi; Seiichi Fukawa; Kengo Kuma - Web page: https://patentgrep.com/patent/US8769897B2 ## CPC - E04G 19/00: Auxiliary treatment of forms, e.g. dismantling; Cleaning devices (lubricating compositions C10M) - E02D 29/02: Retaining or protecting walls (piers or quay walls E02B3/06) - E04B 2/8647: {with ties going through the forms} - E04B 5/00: Floors; Floor construction with regard to insulation; Connections specially adapted therefor (elements for floors, e.g. bricks, stones, filling bodies, girders, E04C; flooring as finishing work, insulation of flooring, sectional false floors, e.g. for computers E04F15/00) - E04F 13/16: of fibres or chips, e.g. bonded with synthetic resins {, or with an outer layer of fibres or chips (E04F13/0864 takes precedence)} - E04F 2203/02: having particular shapes, other than square or rectangular, e.g. triangular, hexagonal, circular, irregular - E04G: SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS - E02D: FOUNDATIONS; EXCAVATIONS; EMBANKMENTS (specially adapted for hydraulic engineering E02B); UNDERGROUND OR UNDERWATER STRUCTURES {(tunnels, tunnelling, mining E21)} - E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001}) - E04F: FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS (windows, doors E06B) ## Abstract The present invention relates to a decorative remaining formwork formed by combining a plurality of single frame plates defined by 3 or more edges comprising one edge arranged horizontally and at least one inclined edge inclined with respect to the horizontal edge; arranging the single frame plates so as to form a predetermined gap in a joint-shape between respective edges of the single frame plates adjacent each other; and having a back plate on a concrete casting surface, the back plate covering the predetermined gap in a longitudinal direction, and being fixed to the single frame plate to connect the single frame plates adjacent each other, and a cross-sectional shape in a width direction of the back plate being formed into a shape enlarged from a contact surface with respect to the single frame plate toward an opposed surface with respect to the contact surface. ## Claims ### Claim 1 A decorative remaining formwork formed by combining a plurality of single frame plates defined by 3 or more edges comprising one edge arranged horizontally and at least one inclined edge inclined with respect to the horizontal edge, arranging the single frame plates so as to form a predetermined gap in a joint-shape between respective edges of the single frame plates adjacent each other, having a back plate on a concrete casting surface, the back plate covering the predetermined gap in a longitudinal direction, and being fixed to the single frame plate to connect the single frame plates adjacent each other, and a cross-sectional shape in a width direction of the back plate being formed into a shape enlarged from a contact surface with respect to the single frame plate toward an opposed surface with respect to the contact surface; and comprising a base unit formed by a combination of two single frame plates forming a rectangle shape by arranging the inclined edges in parallel via the predetermined gap, and having a pattern expressed by continuously arranging the base units in a predetermined direction or by continuously arranging the base units of which the directions are reversed and rotated or reversed or rotated in a predetermined pattern. ### Claim 2 (depends on 1) The decorative remaining formwork according to claim 1, further comprising a basic shape being defined as shapes of the two single frame plates constituting the base unit, and a component part composed of a single frame plate with a shape partially having a void in the single frame plate in the basic shape. ### Claim 3 (depends on 2) The decorative remaining formwork according to claim 2, wherein the single frame plate is a synthetic wood board obtained by forming synthetic resin filled with wood meals in a plate shape. ### Claim 4 (depends on 2) The decorative remaining formwork according to claim 2, wherein the back plate is a synthetic wood board obtained by forming synthetic resin filled with wood meals in a plate shape. ### Claim 5 (depends on 2) A wall surface structure of a concrete construction formed by using the decorative remaining formwork according to claim 2, wherein a surface of the concrete construction is covered with the decorative remaining formwork, and the back plate of the decorative remaining formwork is buried into a hardened concrete. ### Claim 6 (depends on 1) The decorative remaining formwork according to claim 1, wherein the single frame plates have a mixture of different colors. ### Claim 7 (depends on 6) The decorative remaining formwork according to claim 6, wherein the single frame plates adjacent each other have a uniform color to express a pattern by a combination of the single frame plates adjacent each other in the uniform color. ### Claim 8 (depends on 1) The decorative remaining formwork according to claim 1, wherein the single frame plate is a synthetic wood board obtained by forming synthetic resin filled with wood meals in a plate shape. ### Claim 9 (depends on 8) A wall surface structure of a concrete construction formed by using the decorative remaining formwork according to claim 8, wherein a surface of the concrete construction is covered with the decorative remaining formwork, and the back plate of the decorative remaining formwork is buried into a hardened concrete. ### Claim 10 (depends on 1) A wall surface structure of a concrete construction formed by using the decorative remaining formwork according claim 1, wherein a surface of the concrete construction is covered with the decorative remaining formwork, and the back plate of the decorative remaining formwork is buried into a hardened concrete. ### Claim 11 (depends on 10) The wall surface structure of the concrete construction according to claim 10, wherein the single frame plate is fixed to one end of a separator buried into the concrete of the concrete construction. ### Claim 12 (depends on 11) The wall surface structure of the concrete construction according to claim 11, wherein the single frame plate is fixed by threadedly engaging a nut to an axial screw of a frame plate distance regulation body, the frame plate distance regulation body being attached to one end of the separator, and the axial screw passing through and protruding from the single frame plate. ### Claim 13 (depends on 11) A wall surface structure of a concrete construction formed by using the decorative remaining formwork according to claim 11, wherein a surface of the concrete construction is covered with the decorative remaining formwork, and the back plate of the decorative remaining formwork is buried into a hardened concrete. ### Claim 14 (depends on 1) The decorative remaining formwork according to claim 1, wherein the back plate is a synthetic wood board obtained by forming synthetic resin filled with wood meals in a plate shape.