Patent ID: 6257545
Filing Date: 2001-07-10
Classification: B28B,E04G

Abstract:
A tentative fixing mechanism used for tentatively fixing a decorative plate beforehand on a form panel in order to obtain a concrete product having the decorative plates attached on a surface thereof, the tentative fixing mechanism comprising:a tentative fixing element for pressing the decorative plates against a surface of the form panel to fix thereon tentatively, and an attachment hole for the tentative fixing element formed in the form panel,the tentative fixing element has a bolt, a nut, and a decorative-plate holding member, wherein the bolt has a head portion and a leg portion formed with an external thread, the leg portion of the bolt is inserted into the attachment hole for the tentative fixing element from a rear surface of the form panel, the nut is screwed on a projected portion of the leg portion from the form panel to press the decorative plate against the surface of the form panel via the decorative-plate holding member,the decorative-plate holding member has a hole-formed portion where a nut insert hole is formed, at least four arm portions formed so that they spread radially and separately from the hole-formed portion as a center, and a decorative-plate holding surface formed on each of the arm portions, said decorative-plate holding surface being elastically deformable in a nut-screwing direction, andafter concrete is hardened, only the bolt is removed, and the nut and the decorative-plate holding member are left embedded in the concrete product.